CN107143402B

CN107143402B - Exhaust gas processing device

Info

Publication number: CN107143402B
Application number: CN201710447131.8A
Authority: CN
Inventors: 王如双; 秦勇; 王康乐; 张尧
Original assignee: Beijing Foton Daimler Automobile Co Ltd
Current assignee: Beijing Foton Daimler Automobile Co Ltd
Priority date: 2017-06-14
Filing date: 2017-06-14
Publication date: 2019-06-04
Anticipated expiration: 2037-06-14
Also published as: CN107143402A

Abstract

The invention discloses a kind of exhaust gas processing device, exhaust gas processing device includes: vent gas treatment pipeline, and the input end of vent gas treatment pipeline is connected with the outlet end of tail gas collecting device, and including main pipeline and by-pass line in parallel；Catalytic oxidation unit, selective catalytic reduction unit, the import of selective catalytic reduction unit are connected with the outlet of catalytic oxidation unit；The outlet of reducing agent supply unit, reducing agent supply unit is connected with the import of selective catalytic reduction unit；Wherein, catalytic oxidation unit and selective catalytic reduction unit are each provided on main pipeline, and the inlet end of main pipeline is optionally connected to the inlet end of outlet side and by-pass line with outlet side.Exhaust gas processing device of the invention focuses on the tail gas of engine emission in which can be convenient, and will not generate secondary pollution during processing, security risk is small, in the long-term use process, need to only supplement reducing agent, use cost is low, and the maintenance of exhaust gas processing device is convenient.

Description

Exhaust gas processing device

Technical field

The invention belongs to tail gas disposal technique fields, in particular to a kind of exhaust gas processing device.

Background technique

Motor exhaust is that a big principal element of air pollution was producing for car engine engineer's workshop In journey on each rack engine continuous work, caused by pollute more prominent, pollution of the environmental protection administration to enginepiston Considerable limitation has been made in object discharge.

In the related technology, the equipment for treating engine tail gas of mainstream is Dual alkali and chemical method, wherein the former nitrogen oxidation Object detergent power is lower, and equipment can generate the pollution sources such as harmful waste water, waste heat, and the latter mostly uses the chemicals such as strong acid to locate Exhaust gas is managed, it is with high costs, need to be separately provided memory space for hazardous chemical, and generate secondary pollution.

Just because of these problems, equipment for treating engine tail gas in the related technology is not suitable for engine and vehicle producer Daily operation operation, not by wanting after causing most car engine engineer's workshop to be unwilling to increase tail gas treatment device or equipment installation It asks and starts, to increase difficulty to environmental improvement work.

Summary of the invention

The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention proposes a kind of tail Flash Gas Compression Skid System, the exhaust gas processing device can safely and efficiently focus on the tail gas of engine emission.

Exhaust gas processing device according to an embodiment of the present invention, comprising: vent gas treatment pipeline, the vent gas treatment pipeline into Mouth end is connected with the outlet end of tail gas collecting device, and including main pipeline and by-pass line in parallel；Catalytic oxidation unit, selection Property catalytic reduction unit, the import of the selective catalytic reduction unit are connected with the outlet of the catalytic oxidation unit；Reduction The outlet of agent supply unit, the reducing agent supply unit is connected with the import of the selective catalytic reduction unit；Wherein, institute State catalytic oxidation unit and the selective catalytic reduction unit be each provided on the main pipeline, the inlet end of the main pipeline with The inlet end of outlet side and the by-pass line is optionally connected to outlet side.

Exhaust gas processing device according to an embodiment of the present invention focuses on the tail gas of engine emission in which can be convenient, place It manages that high-efficient, low energy consumption, and secondary pollution will not be generated during processing, security risk is small, in the long-term use process, Reducing agent only need to be supplemented, use cost is low, easily operated and maintenance, NO_XEfficiency is eliminated up to 90%-95% or more, And the maintenance of exhaust gas processing device is convenient.

Exhaust gas processing device according to an embodiment of the invention, the reducing agent supply unit include: urea supply dress It sets and is connected with urea injection pipe, the urea device for supplying with the urea injection pipe, the ejection section of the urea injection pipe is stretched Enter the vent gas treatment pipeline and be located at the front side of the selective catalytic reduction unit, is equipped in the vent gas treatment pipeline mixed Device is flowed, the flow mixing device is mounted between the ejection section and the import of the selective catalytic reduction unit.

Preferably, the urea device for supplying includes: air purifier, urea pump and urea tank, the air purifier Outlet be connected with the import of the urea pump with the outlet of the urea tank, the outlet of the urea pump and the urea spray The import for penetrating pipe is connected.

Preferably, the axial direction of the ejection section and the axial direction at the vent gas treatment pipeline where the ejection section are flat Row, the peripheral wall of the ejection section are equipped with the nozzle of multiple settings spaced apart.

Further, the urea injection pipe is multiple, and multiple urea injection pipes are along the vent gas treatment pipeline Circumferentially spaced arrangement, so that multiple ejection sections circumferentially spaced arrangement in the vent gas treatment pipeline.

Exhaust gas processing device according to an embodiment of the invention, further includes: temperature compensation unit, the temperature-compensating list Member is located on the main pipeline, and is located at the front side of the catalytic oxidation unit.

Further, the temperature compensation unit include multiple groups can independent control heating tube, in heating tube described in multiple groups At least one set by SCR control, remaining group passes through A.C. contactor control.

Further, the exhaust gas processing device further include: oxygen device for supplying, the outlet of the oxygen device for supplying It is connected with the main pipeline, and junction is located at the front side of the temperature compensation unit.

Exhaust gas processing device according to an embodiment of the invention, the catalytic oxidation unit and the selective catalysis are also Former unit includes corresponding catalytic reaction cell and catalyst module, and the catalytic reaction cell connection is in the main pipeline On, the catalytic reaction cell includes multiple for installing the loading area of the catalyst module.

Preferably, multiple loading areas include main loading area and preparation loading area, and described are under normal conditions urged Agent module is mounted in the main loading area.

Exhaust gas processing device according to an embodiment of the invention, the vent gas treatment pipeline further include: inlet manifold and The both ends of exhaust main, the main pipeline and by-pass line are connected with the inlet manifold and exhaust main respectively, the master Pipeline is equipped with maintenance valve, and the by-pass line is equipped with bypath valve, and the inlet manifold is equipped with electronic total valve.

Preferably, the vent gas treatment pipeline further include: the first branch pipe, first branch pipe are connected with the main pipeline, First branch pipe is equipped with the first normally opened relief valve；Second branch pipe, second branch pipe is connected with the exhaust main, and institute The second branch pipe is stated equipped with the second normally closed relief valve.

Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the structure principle chart of exhaust treatment system according to an embodiment of the present invention；

Fig. 2 is that the structural schematic diagram of tail gas collecting device according to an embodiment of the present invention (shows vent gas treatment pipeline etc. Component)；

Fig. 3 be I in Fig. 2 at partial enlarged view；

Fig. 4 and Fig. 5 is that the structural schematic diagram of vent gas treatment pipeline according to an embodiment of the present invention (shows temperature-compensating list The components such as member)；

Fig. 6 is the structural schematic diagram of urea injection pipe according to an embodiment of the present invention and flow mixing device cooperation；

Fig. 7 and Fig. 8 is the structural schematic diagram of urea injection pipe according to an embodiment of the present invention；

Fig. 9 be exhaust gas processing device according to an embodiment of the present invention structural schematic diagram (mainly show lower layer's accommodating chamber and Upper layer accommodating chamber)；

Figure 10 is the structural schematic diagram on the floor of upper layer accommodating chamber according to an embodiment of the present invention；

Figure 11 is the structural schematic diagram of catalytic reaction cell according to an embodiment of the present invention；

Figure 12 is the half-section diagram of catalytic reaction cell according to an embodiment of the present invention；

Figure 13 is the end view of catalytic reaction cell according to an embodiment of the present invention.

Appended drawing reference:

Exhaust treatment system 1000,

Tail gas collecting device 100, bye-pass 110, first segment 111, second segment 112, bellows 112a, third section 113, cone Shape open-mouth section 113a, the 4th section 114, pressure-regulating valve 115, sensor connector 116, shut-off valve 117, fire-fighting responds shut-off valve 118, muffler 119 collects pipeline 120, gas collecting tube 121, delivery pipe 122,

Vent gas treatment pipeline 200, inlet manifold 210, the first branch pipe 211, the first relief valve 211a, electronic total valve 212, Main pipeline 220 overhauls valve 221, and by-pass line 230, bypath valve 231, exhaust main 240, the second branch pipe 241, second lets out Pressure valve 241a, blower 250, chimney 260,

Temperature compensation unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500,

Reducing agent supply unit 600, urea device for supplying 610, air purifier 611, urea tank 612, urea pump 613, Urea injection pipe 620, sucting 621, mixing unit 622, linkage section 623, ejection section 624, nozzle 625, jeting area 626 mix Stream device 630, flow deflector 631,

Control unit 700, controller 710, temperature sensor 721, lambda sensor 722, pressure sensor 723, NO_xConcentration Sensor 724, flow sensor 725, differential pressure pickup 726, liquid level sensor 727；

Lower layer's accommodating chamber 810, lower vent window 811, upper layer accommodating chamber 820, the first movable plate 821, the second movable plate 822, Third movable plate 823, upper vent window 824, ladder mouth 825, inspection platform 830 overhaul ladder 831；

Catalytic reaction cell 900, the first connector 910, main cylinder 920, preparation section 921, linkage section 922, principal piece 923 are main Loading area 924, preparation loading area 925, the second connector 930, truncated rectangular pyramids section 941, cylindrical segment 942.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " axial direction ", The orientation or positional relationship of the instructions such as " radial direction ", " circumferential direction " is to be based on the orientation or positional relationship shown in the drawings, merely to just In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with Specific orientation construction and operation, therefore be not considered as limiting the invention.In addition, defining " first ", " second " Feature can explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, The meaning of " plurality " is two or more.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.

Exhaust treatment system 1000 according to an embodiment of the present invention, exhaust treatment system are described below with reference to Fig. 1-Fig. 8 1000, for the vent gas treatment in workshop, are mainly used for the vent gas treatment of engine in enginepiston.

As Figure 1-Figure 8, exhaust treatment system 1000 according to an embodiment of the invention includes: tail gas collecting device 100, exhaust gas processing device and control unit 700, exhaust gas processing device include: vent gas treatment pipeline 200, temperature compensation unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500 and reducing agent supply unit 600.

Wherein, for collecting tail gas, the inlet end of tail gas collecting device 100 is suitably connected to survey tail gas collecting device 100 The inlet end of engine exhaust port on test stand frame, vent gas treatment pipeline 200 is connected with the outlet side of tail gas collecting device 100, The tail gas of engine discharge enters back into centralized processing in vent gas treatment pipeline 200 by the collection of tail gas collecting device 100, to increase The efficiency of strong vent gas treatment, reduces the equipment investment of exhaust treatment system 1000.

Temperature compensation unit 300 is located on vent gas treatment pipeline 200, to adjust the temperature of tail gas to be processed, such as temperature Degree compensating unit 300 may include electric heating tube, electric heating tube can be it is multiple, multiple electric heating tubes can with independent control, with Just the temperature of tail gas to be processed is preferably adjusted on demand.

Catalytic oxidation unit 400 and selective catalytic reduction unit 500, which are sequentially connected in series, to be located in vent gas treatment pipeline 200, The outlet of reducing agent supply unit 600 is connected to vent gas treatment pipeline 200, and outlet and the tail gas of reducing agent supply unit 600 The connectivity part of processing pipeline 200 is located at the front side of selective catalytic reduction unit 500.

Along exhaust gas flow direction, temperature compensation unit 300, catalytic oxidation unit 400 and selective catalytic reduction unit 500 sequentially arrange, corresponding catalyst is mounted in catalytic oxidation unit 400 for catalysis oxidation partial reductive substance, choosing Selecting property catalytic reduction unit 500 is then for selectively restoring NO_X。

For example catalytic oxidation unit 400 can be mainly made of ceramics, main purpose is to reduce hydrocarbon (HC), the content of carbon monoxide (CO) and partial particulate object (PM), particularly, catalytic oxidation unit 400 can effectively catalyze Dissolved organic matter (SOF) in particulate matter (PM) is oxidized, and dissolved organic matter (SOF) may include polycyclic aromatic hydrocarbons (PAH), second The harmful components that do not limit also of regulation at present such as aldehyde, the oxidant of the oxidation reaction that 400 stage of catalytic oxidation unit occurs can be with The oxygen or the oxygen in mixed air that can be carried in tail gas for oxygen, oxygen etc..

The related purification equation of catalytic oxidation unit 400 includes: 2CO+O₂=2CO₂；SOF+O₂→CO₂+H₂O；2NO+O₂ =2NO₂；C+O₂→CO+CO₂。

It is found by many experiments, catalytic oxidation unit 400 can make hydrocarbon reduce 75-90%, and CO reduces 75- 90%, PM reduce 20% or so, and polycyclic aromatic hydrocarbon discharge reduces 60%, and acetaldehyde reduces 70%.Catalytic oxidation unit NO also effectively can be oxidized to NO by the prime of 400 alternatively property catalytic reduction units 500₂, to increase selective catalysis The catalytic performance of reduction unit 500.

Selective catalytic reduction unit 500 under the action of certain temperature and catalyst, can it is selective with tail gas in NO_XIt reacts and generates nontoxic and pollution-free N₂And H₂O, the reducing agent in reaction process are supplied by reducing agent supply unit 600, Reducing agent can be hydrocarbon (such as methane, propylene), NH₃, urea etc..

Control unit 700 is connected with temperature compensation unit 300 and reducing agent supply unit 600, and control unit 700 can root The supply of the power and reducing agent supply unit 600 of temperature compensation unit 300 is controlled according to the design parameter of tail gas to be processed Amount, to make tail gas is more efficient in catalytic oxidation unit 400 and selective catalytic reduction unit 500 more fully to react.

That is, the tail gas of the engine emission on each testboard bay collecting by tail gas collecting device 100, then Enter centralized processing in vent gas treatment pipeline 200 together, control unit 700 is according to state modulators temperature such as temperature, the flows of tail gas The power for spending compensating unit 300, enters tail gas after catalytic oxidation unit 400 and selective catalytic reduction unit 500 suitable Reaction temperature, tail gas in catalytic oxidation unit 400 with oxygen occur oxidation reaction, specifically, hydrocarbon is oxidized For CO₂And H₂O, NO are oxidized to NO₂, the tail gas through peroxidization enters back into selective catalytic reduction unit 500 and is reduced agent The reducing agent reduction that supply unit 600 is supplied, specifically, NO_XIt reacts and generates nontoxic and pollution-free N₂And H₂O, and reducing agent Supply amount is adjustable, and such tail gas is cleaned as non-toxic components, and unharmful substance generates during processing.

Exhaust treatment system 1000 according to an embodiment of the present invention, focuses on the tail of engine emission in which can be convenient Gas, treatment effeciency is high, low energy consumption, and will not generate secondary pollution during processing, and security risk is small, uses in long-term Cheng Zhong only need to supplement reducing agent, and use cost is low, easily operated and maintenance, NO_XEfficiency is eliminated up to 90%-95% More than.

Exhaust treatment system 1000 in accordance with a preferred embodiment of the present invention, as shown in Figure 4 and Figure 5, vent gas treatment pipe Road 200 includes: inlet manifold 210, main pipeline 220 and by-pass line 230, exhaust main 240.

One end of inlet manifold 210 is connected with the outlet side of tail gas collecting device 100, the other end of inlet manifold 210 with The inlet end of main pipeline 220 and the inlet end of by-pass line 230 are connected, and inlet manifold 210 optionally cuts off, main pipeline 220 and by-pass line 230 be connected in parallel between inlet manifold 210 and exhaust main 240, and the inlet end of main pipeline 220 with The outlet side of main pipeline 220 is optionally connected to, and the outlet side of the inlet end and by-pass line 230 of by-pass line 230 is optional It is connected to selecting property, main pipeline 220 is equipped with maintenance valve 221, and by-pass line 230 is equipped with bypath valve 231, temperature compensation unit 300, catalytic oxidation unit 400 and selective catalytic reduction unit 500 are each provided on main pipeline 220, the outlet side of main pipeline 220 And the outlet side of by-pass line 230 is connected with exhaust main 240.

It is understood that the inlet end of inlet manifold 210 is connected with the outlet side of tail gas collecting device 100, main pipeline 220 inlet end is connected with the outlet side of inlet manifold 210, the inlet end of by-pass line 230 and the outlet side of inlet manifold 210 It is connected, the outlet side of main pipeline 220 is connected with the inlet end of exhaust main 240, the outlet side of by-pass line 230 and exhaust main 240 inlet end is connected, and the inlet end of main pipeline 220 is optionally connected to the outlet side of main pipeline 220, by-pass line 230 inlet end is optionally connected to the outlet side of by-pass line 230.

The catalytic oxidation unit 400 and selective catalysis that tail gas catalyzed reaction member may include above-described embodiment description are also Former unit 500, temperature compensation unit 300 can also be located on main pipeline 220, specifically, along airflow direction, temperature-compensating list Member 300, catalytic oxidation unit 400 and selective catalytic reduction unit 500 can be sequentially arranged on main pipeline 220, and temperature is mended The part that unit 300 is disposed adjacent to the inlet end of main pipeline 220 is repaid, selective catalytic reduction unit 500 can be arranged in and lean on The part of the outlet side of nearly main pipeline 220, catalytic oxidation unit 400 can be arranged in catalytic oxidation unit 400 and selectivity is urged Change between reduction unit 500.

Main pipeline 220 is equipped with the first branch pipe 211, and the first branch pipe 211 is equipped with the first normally opened relief valve 211a, exhaust main 240 are equipped with the second branch pipe 241, and the second branch pipe 241 is equipped with the second normally closed relief valve 241a.

There are many effects for first branch pipe 211: first, the first relief valve 211a is opened when carrying out tail gas clean-up, first Pipe 211 is for being mixed into fresh air, to supplement the required oxygen of reaction；Second, control is single after the engine on testboard bay is shut down The 700 electronic total valve 212 of control of member is automatically closed, the 250 Delayed shutdown predetermined time of blower, such as 30 minutes, to pass through the One branch pipe 211 sucks the tail gas catalyzed reaction member on the cooling main pipeline 220 of air and main pipeline 220；Third, can be first Tail gas before handling is extracted at branch pipe 211, the content applied to each ingredient in detection tail gas.

Second branch pipe 241 is connected with exhaust main 240, and the second branch pipe 241 is equipped with the second normally closed relief valve 241a.The Two branch pipes 241 are mainly for detection of the toxic component content after Tail gas measuring after processing, such as environmental protection administration's detection vent gas treatment When, without the second relief valve 241a can be directly opened, at the second branch pipe 241 as climbed in the related technology onto chimney 260 Sampling, in this way, sampling process is safer.

When needing cleaning of off-gas, the inlet end of by-pass line 230 and the outlet side of by-pass line 230 are cut off, main pipeline 220 connections, the first relief valve 211a are opened, the tail gas that tail gas collecting device 100 is enriched with by main pipeline 220, and with from first The fresh air mixing that branch pipe 211 sucks, is cleaned under the action of the tail gas catalyzed reaction member on main pipeline 220, that is to say, that The purified treatment reaction of tail gas mainly occurs in main pipeline 220.

Be not necessarily to perhaps temporarily can not cleaning of off-gas when such as service conduits during or the tail gas catalyzed reaction of maintenance During unit, the outlet side of the inlet end of main pipeline 220 and main pipeline 220 can be cut off, by-pass line 230 is connected to, The tail gas that tail gas collecting device 100 is enriched with can overhaul the same of tail gas catalyzed reaction member in this way by by-pass line 230 When, guarantee the normal exhaust of entire pipeline.

Exhaust treatment system 1000 can also include: blower 250 and chimney 260, import and the vent gas treatment pipe of blower 250 Road 200 is connected, and chimney 260 is connected with the outlet of blower 250, wherein blower 250 is electrically connected with control unit 700, and is set as 250 work of blower is controlled when tail gas collecting device 100 stops supply tail gas and reducing agent supply unit 600 stops supply reducing agent Make the predetermined time (such as 30 minutes) to shut down afterwards.

Blower 250 be it is multiple, the outlet side of exhaust main 240 be it is multiple, each outlet of exhaust main 240 be adapted to One blower 250 connects, and blower 250 can be connected with control unit 700, by controlling the unlatching number of blower 250, can control The flow velocity of tail gas processed, at least one of blower 250 can be frequency conversion fan 250, in this way can be by adjusting single blower 250 Power adjust the flow velocity of tail gas, to make the reaction efficiency phase of the flow velocity of tail gas with tail gas catalyzed reaction member inner exhaust gas Match.

As shown in Fig. 2, the branch road where each blower 250 can be equipped with shut-off valve 117, do not opened in the blower 250 When dynamic, corresponding shut-off valve 117 is closed, and to prevent tail gas from blower 250 being driven to rotate, shut-off valve 117 can be electric-controlled type, and with Control unit 700 is connected.

Optionally, the vent gas treatment pipeline 200 of the embodiment of the present invention can also include: chimney 260, chimney 260 be suitable for The outlet of blower 250 is connected, and chimney 260 can be made of stainless steel, and the height of chimney 260 and the internal diameter of chimney 260 can roots It is determined according to the number of testboard bay and the exhaust emissions amount of engine, guarantees the engine standard-sized sheet on all testboard bays, And tail gas with predetermined peak flow rate (PFR) (such as 8m/s) circulation when, chimney 260 can effectively discharge fume.

As Figure 1-Figure 8, exhaust treatment system 1000 according to an embodiment of the invention includes: tail gas collecting device 100, vent gas treatment pipeline 200, vent gas treatment pipeline 200 is for being connected to tail gas treatment device, such as 400 He of catalytic oxidation unit Selective catalytic reduction unit 500, as shown in Figures 2 and 3, tail gas collecting device 100 include: to collect pipeline 120 and multiple Pipeline 110.

Wherein, the input end of each bye-pass 110 is adapted to be connected with the engine exhaust port on corresponding testboard bay, The number of bye-pass 110 can be identical as the number of the testboard bay in workshop, and multiple bye-passes 110 and multiple testboard bays It corresponds, the outlet end of each bye-pass 110 is connected with the input end for collecting pipeline 120, collects the outlet end of pipeline 120 It is connected with the input end of vent gas treatment pipeline 200, is equipped with pressure-regulating valve 115 on each bye-pass 110.

It is understood that the engine on each testboard bay passes through the collection of each bye-pass 110, then it is pooled to Collect pipeline 120, is transported in vent gas treatment pipeline 200 and is purified by collecting the concentration of pipeline 120, tail gas can be reduced in this way The arrangement quantity of processing equipment reduces the hall space that exhaust treatment system 1000 occupies, and pressure-regulating valve 115 can be effective Ground controls tail gas collecting device 100 to the suction of engine exhaust emission, is maintained at the pressure of the exhaust port of engine Suitable test value, that is to say, that the suction of tail gas collecting device 100 does not influence the test accuracy of engine.

Exhaust treatment system 1000 according to an embodiment of the present invention, by by the tail gas of the engine on each testboard bay It is enriched with the mode being uniformly processed again, can effectively enhance the treatment effeciency of exhaust treatment system 1000, and exhaust treatment system 1000 do not influence the pressure at expulsion of engine.

The exhaust treatment system 1000 of the embodiment of the present invention can also include that the exhaust collection of any one following embodiment fills Set 100.

The exhaust treatment system 1000 of the embodiment of the present invention can also include the vent gas treatment pipe of any one following embodiment Road 200.

The exhaust treatment system 1000 of the embodiment of the present invention can also include that the vent gas treatment of any one following embodiment fills It sets.

The exhaust treatment system 1000 of the embodiment of the present invention can also include the urea mixed flow knot of any one following embodiment Structure.

It is received below with reference to Fig. 2 and Fig. 3 tail gas for further describing exhaust treatment system 1000 according to an embodiment of the present invention Acquisition means 100.

Exhaust treatment system 1000 can also include blower 250, and blower 250 is connected with vent gas treatment pipeline 200, such as wind Machine 250 can be connected with the outlet end of vent gas treatment pipeline 200, and blower 250 can provide the suction of exhaust gas flow, prevent tail gas Flow backward.

Exhaust treatment system 1000 in accordance with a preferred embodiment of the present invention, as shown in figure 3, bye-pass 110 include according to Secondary connected first segment 111 and second segment 112, one end of the separate second segment 112 of first segment 111 is suitable for and engine exhaust port It is connected, one end of the separate first segment 111 of second segment 112 is suitable for being connected with the input end for collecting pipeline 120, needs to illustrate It is that connection described herein can be to be directly connected to, or be indirectly connected with.

As shown in figure 3, pressure-regulating valve 115 is located on first segment 111, the pressure of the adjustable front end of pressure-regulating valve 115 Power prevents air-breathing from influencing engine, and pressure-regulating valve 115 can be electrically-controlled valve.

As shown in figure 3, first segment 111 is also provided with: the both ends of sensor connector 116, sensor connector 116 can lead to It crosses flange to be connected on first segment 111, and sensor connector 116 is located at the rear end of pressure-regulating valve 115, sensor connector 116 Equipped with the installation position for installing sensor, it is inserted into sensor with can be convenient in this way, sensor can be used for detecting tail gas Discharge pressure or ingredient etc..

Further, as shown in Figures 2 and 3, the tail gas collecting device 100 can also include shut-off valve 117, shut-off valve 117 are connected between first segment 111 and second segment 112, for example first segment 111 and second segment 112 can pass through 117 phase of shut-off valve Even, specifically, shut-off valve 117 can be butterfly valve, optionally to cut off the front and back end of tail gas collecting device 100, such as When changing on engine stop work or testboard bay on testboard bay without engine, shut-off valve 117 is operated, first segment is made 111 cut off with second segment 112, will not suck air at the first segment 111.

Preferably, at least part of second segment 112 is bellows 112a.It is understood that first segment 111 and second Section 112 can be connected by ring flange, and at least part of second segment 112 is designed as bellows 112a, on the one hand can be dropped On the other hand the mount stress of low pipeline can play the role of vibration damping, the operational vibration of invention machine is prevented to be transmitted to tail backward Gas processing system 1000 facilitates engine in another aspect, the surface area of bellows 112a is big in the case where length is certain Exhaust heat dissipation,

Preferably, as shown in figure 3, bye-pass 110 can also include: third section 113, second segment 112 can pass through third Section 113 is connect with pipeline 120 is collected, and one end that third section 113 is connected with second segment 112 has taper open-mouth section 113a, taper Open-mouth section 113a is located at outside second segment 112, and is in communication with the outside.

It is understood that third section 113 is connected with second segment 112 and non-tight, when the power of blower 250 is excessive, The open-mouth of taper open-mouth section 113a can prevent the pressure to 115 front end of pressure-regulating valve from having an impact from extraneous air-breathing.

With reference to Fig. 3, one end of the separate second segment 112 of third section 113 is equipped with fire-fighting and responds shut-off valve 118, fire-fighting response Shut-off valve 118 can be motor-driven valve.It is understood that fire-fighting response shut-off valve 118 can be automatically closed when catching fire, prevent It is only evacuated combustion-supporting, and the closing when the testboard bay does not work, prevents the fresh air of sucking excessive.

With reference to Fig. 3, bye-pass 110 can also include: the 4th section 114, and third section 113 passes through the 4th section 114 and manifold trunk Road 120 connects, and the 4th section 114 is equipped with muffler 119, and muffler 119 reduces the gas in workshop for reducing pneumatic noise It makes an uproar.

In some preferred embodiments, meet: S1 < S2 < S3 < S4, wherein S1 is the flow area of first segment 111 Product, S2 are the actual internal area of second segment 112, and S3 is the actual internal area of third section 113, and the circulation that S4 is the 4th section 114 is cut Area.First segment 111 second segment 112, third section 113, can all have circular ring section for the 4th section 114, and can be steel Pipe is made, for example first segment 111 can be made of diameter of the steel pipe of 150mm, and second segment 112 can be that diameter is 200mm's Steel pipe is made, and third section 113 can be made of diameter of the steel pipe of 250mm, and the 4th section 114 can be steel that diameter is 300mm Pipe is made.

Exhaust treatment system 1000 in accordance with a preferred embodiment of the present invention, as shown in Fig. 2, collecting pipeline 120 can be with Including gas collecting tube 121 and delivery pipe 122, multiple bye-passes 110 are divided to the two sides that gas collecting tube 121 is arranged in for two groups, and every Multiple bye-passes 110 in group are spaced apart along the length direction of gas collecting tube 121 to be connected with gas collecting tube 121, the import of delivery pipe 122 End is connected with the middle part of gas collecting tube 121, and the outlet end of delivery pipe 122 is connected with the input end of vent gas treatment pipeline 200.This The distance of sample, the input end of each bye-pass 110 to vent gas treatment pipeline 200 is more balanced, the tail gas on each testboard bay Collection efficiency is more consistent.

Further, temperature compensation unit 300, catalytic oxidation unit 400 and choosing are arranged in sequence on vent gas treatment pipeline 200 Selecting property catalytic reduction unit 500.Temperature compensation unit 300 is used to adjust the temperature of tail gas to be processed, catalytic oxidation unit 400 The dissolved organic matter (SOF) that can effectively catalyze in particulate matter (PM) is oxidized, and selective catalytic reduction unit 500 is one It, can the selective NO with tail gas under the action of determining temperature and catalyst_XIt reacts and generates nontoxic and pollution-free N₂And H₂O。

Vent gas treatment pipeline 200 according to an embodiment of the invention is described below with reference to Fig. 1, Fig. 4 and Fig. 5.

As shown in Figure 1, Figure 4 and Figure 5, vent gas treatment pipeline 200 according to an embodiment of the invention includes: main pipeline 220, by-pass line 230, exhaust main 240, main pipeline 220 and by-pass line 230 are connected in parallel, and the air inlet of main pipeline 220 End is connected with the outlet side of tail gas collecting device 100, the inlet end of by-pass line 230 and the outlet side of tail gas collecting device 100 It is connected, the outlet side of main pipeline 220 is connected with the inlet end of exhaust main 240, the outlet side of by-pass line 230 and exhaust main 240 inlet end is connected, and the inlet end of main pipeline 220 is optionally connected to the outlet side of main pipeline 220, by-pass line 230 inlet end is optionally connected to the outlet side of by-pass line 230, is suitable for installing on main pipeline 220 tail gas catalyzed anti- Unit is answered, the outlet side of exhaust main 240 is suitable for being connected with the suction inlet of blower 250.

It is understood that tail gas catalyzed reaction member may include the catalytic oxidation unit 400 of above-described embodiment description With selective catalytic reduction unit 500, temperature compensation unit 300 can also be located on main pipeline 220, specifically, along air-flow Direction, temperature compensation unit 300, catalytic oxidation unit 400 and selective catalytic reduction unit 500 can sequentially be arranged in supervisor On road 220, temperature compensation unit 300 is disposed adjacent to the part of the inlet end of main pipeline 220, selective catalytic reduction unit 500 can be disposed adjacent to the part of the outlet side of main pipeline 220, and catalytic oxidation unit 400 can be arranged in catalysis oxidation list Between member 400 and selective catalytic reduction unit 500.

When needing cleaning of off-gas, the inlet end of by-pass line 230 and the outlet side of by-pass line 230 are cut off, main pipeline 220 connections, the tail gas that tail gas collecting device 100 is enriched with pass through main pipeline 220, and the tail gas catalyzed reaction on main pipeline 220 It is cleaned under the action of unit, that is to say, that the purified treatment reaction of tail gas mainly occurs in main pipeline 220.

Vent gas treatment pipeline 200 according to an embodiment of the present invention, can carry out the switching of multiple-working mode, and pipeline and The maintenance of equipment on pipeline does not influence the normal production in workshop.

As shown in Figure 1, Figure 4 and Figure 5, vent gas treatment pipeline 200 according to an embodiment of the invention includes: inlet manifold 210, it is total that main pipeline 220, by-pass line 230, exhaust main 240, main pipeline 220 and by-pass line 230 are connected in air inlet in parallel Between pipe 210 and exhaust main 240, and the inlet end of main pipeline 220 is optionally connected to the outlet side of main pipeline 220, The inlet end of by-pass line 230 is optionally connected to the outlet side of by-pass line 230, and main pipeline 220 is equipped with the first branch pipe 211, the first branch pipe 211 is equipped with the first normally opened relief valve 211a, and exhaust main 240 is equipped with the second branch pipe 241, the second branch pipe 241 are equipped with the second normally closed relief valve 241a, are suitable for installing tail gas catalyzed reaction member on main pipeline 220.

Second branch pipe 241 is connected with exhaust main 240, and the second branch pipe 241 is equipped with the second normally closed relief valve 241a.The Two branch pipes 241 are mainly for detection of the toxic component content after Tail gas measuring after processing, such as environmental protection administration's detection vent gas treatment When, without such as being climbed in the related technology onto chimney 260, the second relief valve 241a can be directly opened, at the second branch pipe 241 Sampling, in this way, sampling process is safer.

Vent gas treatment pipeline 200 according to an embodiment of the present invention, can carry out the switching of multiple-working mode, and pipeline and The maintenance of equipment on pipeline does not influence the normal production in workshop, tail gas before treatment after safety easy to detect.

Vent gas treatment pipeline 200 according to an embodiment of the present invention is further described below with reference to Fig. 1, Fig. 4 and Fig. 5.

Vent gas treatment pipeline 200 in accordance with a preferred embodiment of the present invention can also include: inlet manifold 210, supervisor Road 220 and by-pass line 230 are connected by inlet manifold 210 with the outlet side of tail gas collecting device 100, and inlet manifold 210 Equipped with electronic total valve 212.

The inlet end of inlet manifold 210 can be connected with the outlet side of tail gas collecting device 100, specifically, inlet manifold 210 inlet end can be connected with the outlet end of delivery pipe 122.

Electronic total valve 212 can be connected with control unit 700, when the engine on each testboard bay is all shut down Or when all without engine, control unit 700 can control electronic total valve 212 and close, and make entire vent gas treatment pipeline 200 It is cut off with tail gas collecting device 100, prevents chimney 260 and flue from remaining toxic tail gas " reverse irrigation ".

As shown in Figure 4 and Figure 5, main pipeline 220 is equipped with maintenance valve 221, and maintenance valve 221 can be located at tail gas catalyzed anti- The front of unit is answered, by-pass line 230 is equipped with bypath valve 231, overhauls valve 221 and bypath valve 231 can be manual Valve.

When needing cleaning of off-gas, maintenance valve 221 is in the open state, and bypath valve 231 is in close state；In nothing When needing cleaning of off-gas, maintenance valve 221 is in close state, and bypath valve 231 is in the open state；It should be noted that valve Door is in the open state to indicate that corresponding pipeline be in connected state, and valve, which is in close state, indicates corresponding pipeline in cutting Disconnected state.

Further, maintenance valve 221 can distinguish tail gas catalyzed reaction at least two, and two maintenance valves 221 The front and back of unit.In this way, can prevent tail gas from pouring into tail gas catalyzed reaction member from both ends when being not necessarily to cleaning of off-gas.

Vent gas treatment pipeline 200 in accordance with a preferred embodiment of the present invention, as shown in Figure 4 and Figure 5, vent gas treatment pipeline 200 can also include: the first branch pipe 211 and the second branch pipe 241.

Wherein, the first branch pipe 211 is connected with main pipeline 220, and the junction of the first branch pipe 211 and main pipeline 220 is located at It overhauls between valve 221 and tail gas catalyzed reaction member, wherein the maintenance valve 221 is located at tail gas catalyzed reaction member and supervisor Between the inducer in road 220, that is to say, that the junction of the first branch pipe 211 and main pipeline 220 is located at temperature compensation unit 300 Input end and upstream maintenance valve 221 between, the junction of the first branch pipe 211 and main pipeline 220 can be adjacent to front end Maintenance valve 221 rear side, the first branch pipe 211 be equipped with the first normally opened relief valve 211a.

Optionally, the open end of the first branch pipe 211 and the second branch pipe 241 is downward.Thus, it is possible to prevent dust and other impurities Fall inlet pipe road.

As shown in Figure 4 and Figure 5, exhaust main 240 can be T shape, and opposite two inlet end of exhaust main 240 is distinguished It is connected with the outlet side of main pipeline 220 and by-pass line 230, the other end of exhaust main 240 is outlet side, and exhaust main 240 outlet side is connected with the suction inlet of blower 250.

Vent gas treatment pipeline 200 in accordance with a preferred embodiment of the present invention, main pipeline 220, by-pass line 230, exhaust Heat-insulating, fire-preventing set is all covered with outside general pipeline 240, vent gas treatment pipeline 200 is arranged indoors, for example can be arranged in container and be built At workshop in, be high-temperature tail gas due to being passed through in pipeline, and be equipped with temperature compensation unit 300 heated, heat-insulating, fire-preventing The heat radiation of pipeline can be effectively reduced in set, reduces the temperature in workshop, and prevent high temperature on fire.Specifically, heat-insulating, fire-preventing set It may include rock wool layer, glass layer and aluminum layer from inside to outside, rock wool layer and glass layer can play heat-insulated Effect, rock wool layer, glass layer and aluminum layer can play the role of fireproof, and aluminum layer can prevent rock wool layer, glass fibers The fiber of dimension layer is fallen, convenient for building clean power house environment.

Vent gas treatment pipeline 200 in accordance with a preferred embodiment of the present invention, as shown in Figure 4 and Figure 5, exhaust main 240 Outlet side be it is multiple, each outlet of exhaust main 240 is adapted to connect with a blower 250.Blower 250 can be with control Unit 700 is connected, and by controlling the unlatching number of blower 250, can control at least one of the flow velocity of tail gas, blower 250 It can be frequency conversion fan 250, the flow velocity of tail gas can be adjusted by adjusting the power of single blower 250 in this way, to make tail The flow velocity of gas and the reaction efficiency of tail gas catalyzed reaction member inner exhaust gas match.

Exhaust gas processing device according to an embodiment of the invention is described below with reference to Fig. 1, Fig. 4-Fig. 8.

As shown in Fig. 1, Fig. 4-Fig. 8, exhaust gas processing device includes: vent gas treatment pipeline 200, catalytic oxidation unit 400, choosing Selecting property catalytic reduction unit 500 and reducing agent supply unit 600.

Wherein, the input end of vent gas treatment pipeline 200 is connected with the outlet end of tail gas collecting device 100, and vent gas treatment Pipeline 200 includes main pipeline 220 and by-pass line 230, and main pipeline 220 and by-pass line 230 are connected in parallel, main pipeline 220 Inlet end is optionally connected to the inlet end of outlet side and by-pass line 230 with outlet side, catalytic oxidation unit 400 It is each provided on main pipeline 220 with selective catalytic reduction unit 500, the import of selective catalytic reduction unit 500 and catalysis oxygen The outlet for changing unit 400 is connected, and the outlet of reducing agent supply unit 600 is connected with the import of selective catalytic reduction unit 500.

It is understood that the inlet end of main pipeline 220 is optionally connected to the outlet side of main pipeline 220, bypass The inlet end of pipeline 230 is optionally connected to the outlet side of by-pass line 230.

It is connected to the outlet side of main pipeline 220 and the inlet end and bypass of by-pass line 230 in the inlet end of main pipeline 220 When the outlet side cutting of pipeline 230, the tail gas imported from tail gas mobile device enters main pipeline 220, and first by catalysis oxidation list Member 400 is catalyzed, and oxidation reaction occurs, the fractions in tail gas are oxidized, such as carbon monoxide (CO), part carbon in tail gas Hydrogen compound (HC), partial particulate object (PM) part dissolved organic matter (SOF) are oxidized, and catalytic oxidation unit 400 can also be with NO is oxidized to NO₂。

Tail gas after peroxidization is mixed with the reducing agent that reducing agent supply unit 600 is supplied, and enters selection Property catalytic reduction unit 500, the NO under the catalytic action of catalyst, in reducing agent and tail gas_XIt reacts and generates nontoxic no dirt The N of dye₂And H₂O, the reducing agent in reaction process are supplied by reducing agent supply unit 600, and reducing agent can be hydrocarbon (such as methane, propylene), NH₃, urea etc..

When carrying out overhaul of the equipments, the outlet side of the inlet end and main pipeline 220 that can make main pipeline 220 is cut off, bypass The inlet end of pipeline 230 is connected to the outlet side of by-pass line 230, in this way, tail gas does not interfere with the maintenance of equipment.

As shown in Figure 1, in a preferred embodiment of the invention, exhaust gas processing device can also include: temperature-compensating Unit 300, temperature compensation unit 300 are located on main pipeline 220, and temperature compensation unit 300 is located at catalytic oxidation unit 400 Front side.Temperature compensation unit 300 is used to adjust the temperature of tail gas to be processed, so that corresponding to oxidation reaction and reduction reaction The activity of catalyst is more preferable, the efficiency of intensified response.

Such as temperature compensation unit 300 may include electric heating tube, electric heating tube can be it is multiple, multiple electric heating tubes can With independent control, preferably to adjust the temperature of tail gas to be processed on demand.

Further, temperature compensation unit 300 may include multiple groups can independent control heating tube, in multiple groups heating tube At least one set is controlled by SCR control, remaining group by A.C. contactor.

It is understood that A.C. contactor is the circuit connection for having contact in kind, it can control heating tube and open or close It closes, by controlling the unlatching quantity of heating tube, the temperature of tail gas can be controlled stepsly, and the price of A.C. contactor is just Preferably, facilitate the cost of reduction temperature compensation unit 300.

It is silicon-controlled to can control adjusting output, such as the heating tube for being controlled, it can continuously control heating tube Heating power increases or reduces, but silicon-controlled price is higher, can by the temperature compensation unit 300 of above structure form To realize the continuous control of exhaust temperature, and the cost of temperature compensation unit 300 is low.

Further, exhaust gas processing device can also include: oxygen device for supplying, the outlet of oxygen device for supplying and supervisor Road 220 is connected, and junction is located at the front side of temperature compensation unit 300.Oxygen device for supplying can be oxygen tank, tail gas with And when oxygen and content deficiency in the fresh air of air-breathing, by filling into oxygen, the efficiency of purification reaction can be accelerated, improve purification Efficiency.

Exhaust gas processing device in accordance with a preferred embodiment of the present invention, catalytic oxidation unit 400 include corresponding catalysis Reaction vessel and catalyst module, selective catalytic reduction unit 500 include corresponding catalytic reaction cell and catalyst module, Catalytic reaction cell is connected on main pipeline 220, and catalytic reaction cell includes multiple for installing the loading area of catalyst module Domain, multiple loading areas include main loading area and preparation loading area, and catalyst module is mounted on main loading under normal conditions In region.

It is understood that when the gross exhaust gas of engine increases, for example the number of testboard bay increases, or replacement When the engine of huge discharge, if detecting, tail gas clean-up rate is not up to standard, can be by increasing catalyst mould in preparation loading area The mode of block is designed by the transfiguration to catalytic reaction cell, can not be changed at entire tail gas to promote the efficiency of catalysis reaction The structure of device is managed, the transformation of exhaust gas processing device is simple and convenient, at low cost.

The catalyst module of catalytic oxidation unit 400 can use honeycomb carrier, in this way, the specific surface of catalyst module Product is high, and the activity of catalyst is high, and the hole of multiple bents can be equipped on catalyst coat, can be with shape at the inflection point in hole The efficiency of oxidation reaction is helped to improve in this way, the activity of catalytic oxidation unit 400 is high at catalyst activity point.

The catalyst module of selective catalytic reduction unit 500 can use honeycomb carrier, in this way, catalyst module Specific surface area is high, and the activity of catalyst is high, can be equipped with the hole of multiple bents on catalyst coat, at the inflection point in hole Catalyst activity point can be formed, in this way, the activity of selective catalytic reduction unit 500 is high, helps to improve reduction reaction Efficiency.

Exhaust gas processing device in accordance with a preferred embodiment of the present invention, vent gas treatment pipeline 200 further include: inlet manifold 210 and exhaust main 240, the both ends of main pipeline 220 and by-pass line 230 respectively with inlet manifold 210 and exhaust main 240 It is connected, main pipeline 220 is equipped with maintenance valve 221, and by-pass line 230 is equipped with bypath valve 231, and inlet manifold 210 is equipped with electronic Total valve 212.

The inlet end of inlet manifold 210 is connected with the outlet side of tail gas collecting device 100, the inlet end of main pipeline 220 with The outlet side of inlet manifold 210 is connected, and the inlet end of by-pass line 230 is connected with the outlet side of inlet manifold 210, main pipeline 220 outlet side is connected with the inlet end of exhaust main 240, the outlet side of by-pass line 230 and the inlet end of exhaust main 240 Be connected, the inlet end of main pipeline 220 is optionally connected to the outlet side of main pipeline 220, the inlet end of by-pass line 230 and The outlet side of by-pass line 230 is optionally connected to.

When needing cleaning of off-gas, bypath valve 231 is closed, the inlet end of by-pass line 230 and going out for by-pass line 230 The cutting of gas end, maintenance valve 221 are opened, and main pipeline 220 is connected to, and the tail gas that tail gas collecting device 100 is enriched with passes through main pipeline 220, and be cleaned under the action of the tail gas catalyzed reaction member on main pipeline 220, that is to say, that the purified treatment of tail gas is anti- Should mainly it occur in main pipeline 220.

Be not necessarily to perhaps temporarily can not cleaning of off-gas when such as service conduits during or the tail gas catalyzed reaction of maintenance During unit, maintenance valve 221 is closed, and the inlet end of main pipeline 220 and the outlet side of main pipeline 220 are cut off, and prevents tail Gas leakage, bypath valve 231 are opened, and by-pass line 230 is connected to, and form interim exhaust emissions channel, and tail gas collecting device 100 is rich The tail gas of collection is discharged by by-pass line 230, can guarantee entire pipeline while overhauling tail gas catalyzed reaction member in this way Normal exhaust.

Further, vent gas treatment pipeline 200 further include: the first branch pipe 211 and the second branch pipe 241.

It should be noted that the exhaust treatment system 1000 of the embodiment of the present invention can also include any of the above-described a embodiment Vent gas treatment pipeline 200.

As shown in Figure 1, in a preferred embodiment of the invention, reducing agent supply unit 600 includes: urea supply dress 610 and urea injection pipe 620 are set, urea device for supplying 610 is connected with urea injection pipe 620, the ejection section of urea injection pipe 620 624 protrude into vent gas treatment pipeline 200, and the ejection section 624 of urea injection pipe 620 is located at selective catalytic reduction unit 500 Front side, vent gas treatment pipeline 200 is interior to be equipped with flow mixing device 630, and flow mixing device 630 is mounted on ejection section 624 and selective catalytic reduction Between the import of unit 500.

It is understood that urea device for supplying 610 passes through urea injection pipe 620 to vent gas treatment pipeline 200 and interior spray Urea is penetrated, the tail gas being catalyzed by catalytic oxidation unit 400 flows together by spraying with urea, and under the action of flow mixing device 630 It is sufficiently mixed, enters selective catalytic reduction unit 500 by well-mixed urea and tail gas, and in selective catalytic reduction NO under the action of the catalyst of unit 500, in urea and tail gas_XIt reacts, reaction principle is as follows:

Urea high temperature heat hydrolysis NH₃, (NH2) 2CO=HNCO+NH3, HNCO+H2O=CO2+NH3；4NH₃+4NO+O₂ =4N₂+6H₂O；2NH₃+NO+NO₂=2N₂+3H₂O；4NH₃+2NO₂+ O2=3N₂+6H₂O。

Exhaust gas processing device will not generate secondary pollution, and buying and the convenient storage of urea as a result, without such as related skill Individual dangerous material storeroom is arranged in art like that, and the buying of urea is convenient, not by control, and it is cheap, help to reduce tail The cost of gas disposal.

Specifically, as shown in Figure 1, urea device for supplying 610 includes: air purifier 611, urea pump 613 and urea tank 612, the outlet of air purifier 611 is connected with the import of urea pump 613 with the outlet of urea tank 612, and urea pump 613 goes out Mouth is connected with the import of urea injection pipe 620.

Air purifier 611 is used to provide free from admixture, cleanliness high compressed air for urea pump 613, to prevent urea Pump 613 and urea injection pipe 620 block, and guarantee that equipment can continue, steadily work.

Urea pump 613 can be metering pump and be connected with control unit 700 that urea pump 613 sucks urea from urea tank 612 Solution, and clean air is sucked by air purifier 611, air is pumped into urea injection pipe together with urea liquid 620, the mixture fair current for measuring urea liquid and air that urea pump 613 is sent can be sprayed into tail gas by urea injection pipe 620 Pipeline 200 is handled, and makes the mixture uniform atomizing sprayed, to promote the contact area of urea and tail gas, enhancing reduction is anti- The efficiency answered.

Urea mixed-flow structure according to an embodiment of the present invention, the following any realities of the present invention are described below with reference to Fig. 6-Fig. 8 The urea mixed-flow structure for applying example can be used for the exhaust treatment system 1000 and exhaust gas processing device of any of the above-described kind of embodiment.

As Figure 6-Figure 8, urea mixed-flow structure includes: vent gas treatment pipeline 200, urea injection pipe 620 and flow mixing device 630。

Wherein, vent gas treatment pipeline 200 can be any of the above-described kind of implementation for the tail gas that circulates, vent gas treatment pipeline 200 The input end of the vent gas treatment pipeline 200 of example, urea injection pipe 620 can be connected with urea device for supplying 610, urea injection pipe 620 have ejection section 624, and the peripheral wall of ejection section 624 is equipped with the nozzle 625 of multiple settings spaced apart, and ejection section 624 protrudes into tail gas Pipeline 200 is handled, specifically, ejection section 624 can be between catalytic oxidation unit 400 and selective catalytic reduction unit 500 Main pipeline 220 protrude into, the angle of the flow direction of the injection direction and tail gas of nozzle 625 is greater than or equal to 90 °, the spray of nozzle 625 The axial direction that direction is the spray area that nozzle 625 ejects is penetrated, flow mixing device 630 is located in vent gas treatment pipeline 200, and flow mixing device 630 are located at after ejection section 624.

It is sprayed it is understood that urea forms urea after spraying into vent gas treatment pipeline 200 by nozzle 625, due to Nozzle 625 is located on the peripheral wall of ejection section 624, and multiple nozzles 625 in ejection section 624 are sprayed towards different directions It penetrates, the mutual jeting area 626 of multiple nozzles 625 is non-overlapping or overlapping area is small, and the atomizing effect of urea is more preferable, and nozzle The angle of the flow direction of 625 injection direction and tail gas is greater than or equal to 90 °, can extend urea in this way and be sprayed at flow mixing device 630 The flowing time in region, flow mixing device 630 is spraying for mixed tail gas and urea, makes anti-in selective catalytic reduction unit 500 Should more sufficiently, reaction efficiency is higher.

Urea mixed-flow structure according to an embodiment of the present invention can effectively promote the mixed effect of urea and tail gas, mist The urea and tail gas of shape can be sufficiently mixed, and are conducive to catalytic conversion reaction and sufficiently carried out.

In some preferred embodiments of the invention, as shown in fig. 6, urea injection pipe 620 can be multiple, multiple urine Plain injection pipe 620 along vent gas treatment pipeline 200 circumferentially spaced arrangement so that multiple ejection sections 624 are in vent gas treatment pipeline Circumferentially spaced arrangement in 200.

In this way, the jeting area 626 of nozzle 625 can cover most of region of vent gas treatment pipeline 200, and different sprays The registration penetrated between region 626 is small, or even without coincidence, urea is spraying and the mixing of tail gas more sufficiently and uniformly, facilitate It is catalyzed the efficient progress of reaction.

In a specific embodiment, with reference to Fig. 6, the center of multiple ejection sections 624 concyclic can be arranged, and multiple sprays The center of circle of the circle being centrally formed in portion 624 is penetrated on the axis of vent gas treatment pipeline 200.In this way, the jeting area of nozzle 625 626 distribution in vent gas treatment pipeline 200 is more balanced.Vent gas treatment pipeline 200 is cylindrical, in multiple ejection sections 624 The diameter of a circle being formed centrally is equal to the half of the internal diameter of vent gas treatment pipeline 200, so that the coincidence before jeting area 626 Degree and registration between jeting area 626 and the internal perisporium of vent gas treatment pipeline 200 are minimum.For example, as shown in fig. 6, urine Plain injection pipe 620 can be four, four urea injection pipes 620 can along vent gas treatment pipeline 200 circumferential direction it is evenly-spaced Arrangement, accordingly, urea pump 613 can be four, and four urea pumps 613 and urea injection pipe 620 correspond.

As shown in fig. 6, the axial direction of ejection section 624 can be axial parallel with vent gas treatment pipeline 200, and specifically, injection The axial direction in portion 624 can be axial parallel at the vent gas treatment pipeline 200 where ejection section 624, and the injection side of nozzle 625 To axially vertical with vent gas treatment pipeline 200.In this way, the spraying initial velocity of urea that nozzle 625 sprays is along vent gas treatment The axial direction of pipeline 200 is substantially zeroed, helps to extend that urea is spraying and the incorporation time of tail gas.

Urea mixed-flow structure according to an embodiment of the present invention, flow mixing device 630 may include multiple flow deflectors 631, multiple to lead At least two extending direction in flow 631 is different from angle formed by the axial direction of vent gas treatment pipeline 200, further, Multiple flow deflectors 631 divide for multiple groups, and every group of multiple flow deflectors 631 can be formed as the dendriform of bifurcated.In this way, being equivalent to tail Gas and the spraying mixture of urea will make the movement of bent locating for flow mixing device 630 in 200 sections of vent gas treatment pipeline, can To extend, urea is spraying and the mixed path of tail gas.

Urea mixed-flow structure according to an embodiment of the present invention, with reference to Fig. 6-Fig. 8, urea injection pipe 620 may include: mixing Portion 622 and ejection section 624, mixing unit 622 is used for mixing air and urea liquid, so that the nozzle 625 of ejection section 624 sprayed The atomizing effect of urea is good, and one end of the separate nozzle 625 of ejection section 624 is vertical with mixing unit 622 to be connect, 624 edge of ejection section It is radially into vent gas treatment pipeline 200.The evenly-spaced setting of multiple nozzles 625 in each ejection section 624.

Urea injection pipe 620 according to an embodiment of the present invention, the following any realities of the present invention are described below with reference to Fig. 6-Fig. 8 Apply example urea injection pipe 620 can be used for the exhaust treatment system 1000 of any of the above-described kind of embodiment, exhaust gas processing device and Urea mixed-flow structure.

As Figure 6-Figure 8, urea injection pipe 620 according to an embodiment of the present invention includes: sucting 621, mixing unit 622 With ejection section 624.

Wherein, the import of sucting 621 be suitable for be connected with the outlet of urea device for supplying 610, such as sucting 621 into Mouth is suitable for being connected with the outlet of urea pump 613, and suction pump is mixed for receiving the urea liquid and air that urea pump 613 pumps out The import in portion 622 is connected with the outlet of sucting 621, and mixing unit 622 is used for mixing urea solution and air, ejection section 624 One end is connected with the outlet of mixing unit 622, and ejection section 624 is equipped with multiple nozzles 625, and nozzle 625 can be located at ejection section 624 The other end, at least multiple peripheral walls along ejection section 624 in multiple nozzles 625 are arranged spaced apart.

It is understood that ejection section 624 can be for cylinder, the multiple nozzles 625 being located on the peripheral wall of ejection section 624 It can be sprayed towards different directions, the mutual jeting area 626 of these nozzles 625 is non-overlapping or degree of overlapping is small, the mist of urea It is more preferable to change effect.

Urea mixed-flow structure according to an embodiment of the present invention can effectively promote the atomizing effect of urea, to promote urine The mixing uniformity of element and tail gas.

The urea injection pipe 620 of an alternative embodiment according to the present invention, a part in multiple nozzles 625 are located at injection The other end in portion 624.For example, in a specific embodiment, one or more sprays can be equipped on the end face of ejection section 624 Mouth 625, the jeting area 626 that such ejection section 624 ejects it is three-dimensional more preferable.

The urea injection pipe 620 of another preferred embodiment according to the present invention, all nozzles 625 are along ejection section 624 Peripheral wall it is arranged spaced apart, in this way, the spraying initial velocity along exhaust gas flow direction that all nozzles 625 spray is identical, Facilitate urea to mix with the uniform of tail gas by spraying.

As shown in figure 8, the multiple nozzles 625 for being located at the peripheral wall of ejection section 624 are evenly-spaced along the peripheral wall of ejection section 624 Arrangement, specifically, as shown in fig. 7, being located at multiple nozzles 625 of the peripheral wall of ejection section 624 can be located on same circumference.This Sample, the degree of overlapping between the jeting area 626 of two adjacent nozzles 625 is small, and the integral spray that urea injection pipe 620 is formed The distribution in region 626 is more balanced.

In a specific embodiment, as shown in figure 8, the cross section of ejection section 624 include square inner peripheral surface and With circular outer peripheral surface, circle is external in square, and the nozzle 625 for being located at the peripheral wall of ejection section 624 is four, and four nozzles 625 are respectively provided on four sides of square.

The urea injection pipe 620 of another preferred embodiment according to the present invention, as shown in fig. 7, the axial direction of ejection section 624 with Mixing unit 622 it is axially vertical, ejection section 624 and mixing unit 622 are connected by the linkage section 623 of arc.In this way convenient for injection Portion 624 is radially into along vent gas treatment pipeline 200.

The urea injection pipe 620 of another preferred embodiment according to the present invention, nozzle 625 include that spray-hole and hole are stifled, spray Perforation runs through the peripheral wall of ejection section 624, and the stifled radial direction along ejection section 624 in hole is movably located on spray-hole, and hole blocking package includes cone Shape section, and the diameter of conical section gradually becomes smaller from outside to inside along the radial direction of ejection section 624, the diameter of spray-hole is 0.45mm- 0.55mm, such as 0.5mm.

It is understood that urea liquid and air are transported to urea injection pipe under the pressure effect of urea pump 613 620 ejection section 624, mixed solution open hole and block up, the stifled axial movement along spray-hole in hole, so that urea ejection fog-like, and The shape of jeting area 626 can be generally conical, and the atomizing effect of nozzle 625 is good, and atomizing particle average diameter is 40 micro- Rice, reasonable in design, anti-clogging performance is good.

As shown in Figure 1, exhaust treatment system 1000 in accordance with a preferred embodiment of the present invention, control unit 700 include: Controller 710 and sensor, controller 710 are connected to control temperature compensation unit according to the signal of sensor feedback with sensor 300 or reducing agent supply unit 600.

Wherein, sensor may include: the temperature sensor 721 for being arranged in 300 upstream of temperature compensation unit, be arranged in temperature Degree compensating unit 300 in temperature sensor 721, be arranged in 300 downstream of temperature compensation unit temperature sensor 721, arrangement It is passed in the temperature sensor 721 in urea tank 612, the oxygen that is arranged between temperature compensation unit 300 and catalytic oxidation unit 400 Sensor 722, is arranged in temperature at the pressure sensor 723 being arranged between temperature compensation unit 300 and catalytic oxidation unit 400 NOx concentration sensor 724 between compensating unit 300 and catalytic oxidation unit 400, the flow being arranged in main pipeline 220 pass Sensor 725, both ends are connected with the outlet end of the input end of catalytic oxidation unit 400 and selective catalytic reduction unit 500 respectively Differential pressure pickup 726 and the liquid level sensor 727 that is arranged in urea tank 612.

Controller 710 can be according to unlatching power, the urine for the signal control temperature compensation unit 300 that the sensor detects The power of element pump 613, the unlatching number of blower 250 and unlatching power etc..

Exhaust gas processing device according to an embodiment of the present invention is described below with reference to Fig. 9-Figure 10.

Exhaust gas processing device according to an embodiment of the present invention includes: vent gas treatment pipeline 200, temperature compensation unit 300, urges Change oxidation unit 400, selective catalytic reduction unit 500, reducing agent supply unit 600, lower layer's accommodating chamber 810 and upper layer to accommodate Room 820.

Wherein, vent gas treatment pipeline 200 can be the vent gas treatment pipeline 200 of any of the above-described kind of embodiment, temperature-compensating Unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500 are sequentially arranged on vent gas treatment pipeline 200, are restored The outlet of agent supply unit 600 is connected with the import of selective catalytic reduction unit 500, temperature compensation unit 300, catalysis oxidation Unit 400, selective catalytic reduction unit 500, the structure of reducing agent supply unit 600 and connection type are referred to above-mentioned The description of each embodiment.

Upper layer accommodating chamber 820 is located at the top of lower layer's accommodating chamber 810, is equipped in upper layer accommodating chamber 820 and leads to upper layer receiving The ladder of room 820 can be equipped with ladder mouth 825 on the floor of upper layer accommodating chamber 820, pass through for personnel.

The floor of upper layer accommodating chamber 820 has the first movable plate 821, the second movable plate 822 and third movable plate 823, temperature Degree compensating unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500 are arranged in upper layer accommodating chamber 820, and Be arranged in correspondingly the top of the first movable plate 821, the top of the second movable plate 822, third movable plate 823 top.

It is understood that the area of the first movable plate 821 is greater than projection of the temperature compensation unit 300 on floor, the One movable plate 821 covers view field of the temperature compensation unit 300 on floor, and it is living that temperature compensation unit 300 is arranged in first The top of movable plate 821, when the first movable plate 821 is opened, the floor of upper layer accommodating chamber 820 is opened wide at the first movable plate 821, Temperature compensation unit 300 can enter lower layer's accommodating chamber 810 from unlimited, and then easy to repair.

The area of second movable plate 822 is greater than projection of the catalytic oxidation unit 400 on floor, and the second movable plate 822 covers View field of the lid catalytic oxidation unit 400 on floor, catalytic oxidation unit 400 are arranged in the top of the second movable plate 822, When the second movable plate 822 is opened, the floor of upper layer accommodating chamber 820 is opened wide at the second movable plate 822, catalytic oxidation unit 400 can enter lower layer's accommodating chamber 810 from unlimited, and then easy to repair.

The area of third movable plate 823 is greater than projection of the selective catalytic reduction unit 500 on floor, third movable plate 823 view fields of the covering selective catalytic reduction units 500 on floor, selective catalytic reduction unit 500 are arranged in the The top of three movable plates 823, when third movable plate 823 is opened, the floor of upper layer accommodating chamber 820 is at third movable plate 823 It opens wide, selective catalytic reduction unit 500 can enter lower layer's accommodating chamber 810 from unlimited, and then easy to repair.

First movable plate 821, the second movable plate 822, third movable plate 823 mounting means there are many, for example can lead to Hinge installation is crossed, or passes through the installation such as threaded fastener, buckle.

Exhaust gas processing device according to an embodiment of the present invention carries out all parts of exhaust gas processing device with can be convenient Maintenance.

Exhaust gas processing device in accordance with a preferred embodiment of the present invention, temperature compensation unit 300 can be supported on first It on movable plate 821, for example can be supported on by support frame on the first movable plate 821, catalytic oxidation unit 400 is supported on second It on movable plate 822, for example can be supported on by support frame on the second movable plate 822, selective catalytic reduction unit 500 supports It on third movable plate 823, for example can be supported on by support frame on third movable plate 823, in this way, eliminating temperature-compensating The suspension of unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500.

Further, suspension (not shown) can be equipped in upper layer accommodating chamber 820, suspension is arranged in temperature Spend compensating unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500 top, and optionally with temperature Compensating unit 300, catalytic oxidation unit 400, selective catalytic reduction unit 500 are connected.

Specifically, suspension includes: the first hook, the second hook, third hook.First hitch arrangements are in temperature-compensating The top of unit 300, the second hitch arrangements in the top of catalytic oxidation unit 400, third hitch arrangements selective catalysis also The top of former unit 500.Suspension can be hydraulic-driven or motor driven, and the first hook, the second hook, third hook can To realize lifting by pulley or pulley blocks.Such as when needing repairing catalytic oxidation unit 400, by catalytic oxidation unit 400 It hangs on the second hook, opens the second movable plate 822, catalytic oxidation unit 400 is dropped in lower layer's accommodating chamber 810.

Reducing agent supply unit 600 may include urea tank, and urea tank can be arranged in lower layer's accommodating chamber 810, so as to In supplement urea.

As shown in figure 9, being equipped with vent window, lower layer's accommodating chamber on the peripheral wall of lower layer's accommodating chamber 810 and upper layer accommodating chamber 820 810 are equipped with lower vent window 811, and upper layer accommodating chamber 820 is equipped with upper vent window 824, are held with realizing to lower layer's accommodating chamber 810 and upper layer The ventilation of room 820 is received, it is, of course, also possible to forced ventilation equipment, such as blower are equipped with, in lower layer's accommodating chamber 810 and upper layer appearance Receive room 820 temperature it is higher when force air draft.

As shown in figure 9, can be equipped with inspection platform 830 outside upper layer accommodating chamber 820, inspection platform 830 can be held by lower layer The portion top wall of room 810 received is formed.It is understood that one end of upper layer accommodating chamber 820, which can be equipped with, passes through inspection platform 830 Maintenance door, upper layer accommodating chamber 820 be located at inspection platform 830 at periphery wall be equipped with maintenance ladder 831, in order to repair Personnel's maintenance.

In a specific example, upper layer accommodating chamber 820 and lower layer's accommodating chamber 810 can be container system at.By This, can reduce the construction cost of exhaust gas processing device, convenient for resettlement.

The catalytic reaction cell 900 of exhaust gas processing device according to an embodiment of the present invention is described below with reference to Figure 11-Figure 13, Catalytic reaction cell 900 is used to place catalyst module, such as when catalytic reaction cell 900 is used as catalytic oxidation unit 400 Catalyst module corresponding with catalytic oxidation unit 400 can be placed when shell, in catalytic reaction cell 900；When catalysis is reacted When container 900 is used as the shell of selective catalytic reduction unit 500, it can place in catalytic reaction cell 900 and be urged with selectivity Change the corresponding catalyst module of reduction unit 500.

The catalytic reaction cell 900 of exhaust gas processing device according to an embodiment of the present invention includes: the first connector 910, main cylinder Body 920, the second connector 930.

Wherein, the first connector 910 and the second connector 930 are used to be connected with vent gas treatment pipeline 200, such as the first connector One end of 910 separate main cylinder 920 can be equipped with ring flange, and one end of the separate main cylinder 920 of the second connector 930 is equipped with method Blue disk, such catalytic reaction cell 900 is easy to be connected with vent gas treatment pipeline 200, and in the event of a failure, is readily disassembled.

The both ends open of main cylinder 920 limits main loading area 924 and preparation loading area 925 in main cylinder 920, First connector 910 is connected with one end of main cylinder 920, and the second connector 930 is connected with the other end of main cylinder 920.

It is understood that when the gross exhaust gas of engine increases, for example the number of testboard bay increases, or replacement When the engine of huge discharge, if detecting, tail gas clean-up rate is not up to standard, can be by increasing catalyst in preparation loading area 925 The mode of module, to promote the efficiency of catalysis reaction.

Catalytic reaction cell 900 according to an embodiment of the present invention, is designed by transfiguration, can not change entire vent gas treatment On the basis of the structure of device, catalytic efficiency is adjusted, the transformation of exhaust gas processing device is simple and convenient, at low cost.

Catalytic reaction cell 900 in accordance with a preferred embodiment of the present invention, as shown in figure 12, main 924 He of loading area Preparation loading area 925 can may include: the preparation section being sequentially connected along the axially spaced of main cylinder 920, main cylinder 920 921, linkage section 922, principal piece 923.

First connector 910 is connected with preparation section 921, and the second connector 930 is connected with principal piece 923, prepares separate the of section 921 One end of one connector 910 is connected with linkage section 922, one end and the principal piece 923 far from preparation section 921 of linkage section 922 it is separate One end of second connector 930 is connected.

Principal piece 923 limits main loading area 924, and preparation section 921 limits prepared loading area 925, preparation section 921 with It is equipped with axial limit structure between linkage section 922, axial limit structure, axial limiting are equipped between linkage section 922 and principal piece 923 Structure is for preventing catalyst module from facilitating axial limit structure by the way that the main cylinder 920 of three-stage is arranged along axial float Formation, for example axial limit structure between prepared section 921 and linkage section 922 can be the flange that extends radially inwards, The flange can be located on prepared section 921 or linkage section 922, and the axial limit structure between linkage section 922 and principal piece 923 can be with For the flange extended radially inwards, which can be located in linkage section 922 and principal piece 923.

As shown in Figure 11-Figure 12, the first connector 910 is connected with preparation section 921 by ring flange, the second connector 930 and master Section 923 overlap weldings connection, linkage section 922 are connect with preparation 921 overlap welding of section, and linkage section 922 and the equal overlap welding of principal piece 923 connect It connects.It is understood that above structure makes the convenient disassembly between the first connector 910 and preparation section 921, convenient for addition catalysis Agent module.Certainly, linkage section 922 can also be connected with principal piece 923 by ring flange.

Catalytic reaction cell 900 in accordance with a preferred embodiment of the present invention, as shown in figures 11-13, main cylinder 920 can With with rectangular section, the first connector 910 and the second connector 930 include truncated rectangular pyramids section 941 and cylindrical segment 942, truncated rectangular pyramids Section 941 is connected with main cylinder 920.First connector 910 and the second connector 930 and axial limit can be formed to catalyst module automatically Position.Specifically, main cylinder 920 can have square section, and truncated rectangular pyramids section 941 can be positive truncated rectangular pyramids section 941.

The invention also discloses a kind of exhaust gas processing device, the exhaust gas processing device of the embodiment of the present invention is provided with above-mentioned A kind of catalytic reaction cell 900 of embodiment.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description Point can be combined in any suitable manner in any one or more of the embodiments or examples.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this The range of invention is defined by the claims and their equivalents.

Claims

1. a kind of exhaust gas processing device characterized by comprising

The input end of vent gas treatment pipeline, the vent gas treatment pipeline is connected with the outlet end of tail gas collecting device, and including simultaneously The main pipeline and by-pass line of connection；

Catalytic oxidation unit, selective catalytic reduction unit, the import of the selective catalytic reduction unit and the catalysis oxygen The outlet for changing unit is connected；

Reducing agent supply unit, the outlet and the import phase of the selective catalytic reduction unit of the reducing agent supply unit Even；

Wherein, the catalytic oxidation unit and the selective catalytic reduction unit are each provided on the main pipeline, the supervisor The inlet end in road is optionally connected to the inlet end of outlet side and the by-pass line with outlet side；

The reducing agent supply unit includes: urea device for supplying and urea injection pipe, the urea device for supplying and the urine Plain injection pipe is connected, and the ejection section of the urea injection pipe protrudes into the vent gas treatment pipeline and is located at the selective catalysis also The front side of former unit, the vent gas treatment pipeline is interior to be equipped with flow mixing device, and the flow mixing device is mounted on the ejection section and the choosing Between the import of selecting property catalytic reduction unit；

Axial parallel, the ejection section at the vent gas treatment pipeline of the axial direction of the ejection section where with the ejection section Peripheral wall be equipped with multiple settings spaced apart nozzle.

2. exhaust gas processing device according to claim 1, which is characterized in that the urea injection pipe is multiple, Duo Gesuo Urea injection pipe is stated along the circumferentially spaced arrangement of the vent gas treatment pipeline, so that multiple ejection sections are at the tail gas Manage circumferentially spaced arrangement in pipeline.

3. exhaust gas processing device according to claim 2, which is characterized in that the urea device for supplying includes: that air is net Change device, urea pump and urea tank, the outlet of the outlet of the air purifier and the urea tank with the urea pump into Mouth is connected, and the outlet of the urea pump is connected with the import of the urea injection pipe.

4. exhaust gas processing device according to any one of claim 1-3, which is characterized in that further include: temperature-compensating list Member, the temperature compensation unit are located on the main pipeline, and are located at the front side of the catalytic oxidation unit.

5. exhaust gas processing device according to claim 4, which is characterized in that the temperature compensation unit includes that multiple groups can be only The heating tube of control is found, for at least one set in heating tube described in multiple groups by SCR control, remaining group passes through A.C. contactor Control.

6. exhaust gas processing device according to claim 4, which is characterized in that further include: oxygen device for supplying, the oxygen The outlet of device for supplying is connected with the main pipeline, and junction is located at the front side of the temperature compensation unit.

7. exhaust gas processing device according to any one of claim 1-3, which is characterized in that the catalytic oxidation unit and The selective catalytic reduction unit includes corresponding catalytic reaction cell and catalyst module, and the catalytic reaction cell connects Lead on the main pipeline, the catalytic reaction cell includes multiple for installing the loading area of the catalyst module.

8. exhaust gas processing device according to claim 7, which is characterized in that multiple loading areas include main loading area Domain and preparation loading area, and the catalyst module is mounted in the main loading area under normal conditions.

9. exhaust gas processing device according to any one of claim 1-3, which is characterized in that the vent gas treatment pipeline is also Include: inlet manifold and exhaust main, the both ends of the main pipeline and by-pass line respectively with the inlet manifold and exhaust General pipeline is connected, and the main pipeline is equipped with maintenance valve, and the by-pass line is equipped with bypath valve, and the inlet manifold is equipped with electronic Total valve.

10. exhaust gas processing device according to claim 9, which is characterized in that the vent gas treatment pipeline further include:

First branch pipe, first branch pipe are connected with the main pipeline, and first branch pipe is equipped with the first normally opened relief valve；

Second branch pipe, second branch pipe are connected with the exhaust main, and second branch pipe is equipped with the second normally closed pressure release Valve.