CN220321324U - Natural gas emission reduction system - Google Patents
Natural gas emission reduction system Download PDFInfo
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- CN220321324U CN220321324U CN202321864342.9U CN202321864342U CN220321324U CN 220321324 U CN220321324 U CN 220321324U CN 202321864342 U CN202321864342 U CN 202321864342U CN 220321324 U CN220321324 U CN 220321324U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000003345 natural gas Substances 0.000 title claims abstract description 50
- 230000009467 reduction Effects 0.000 title claims abstract description 16
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 126
- 230000003647 oxidation Effects 0.000 claims abstract description 46
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 46
- 238000011282 treatment Methods 0.000 claims abstract description 39
- 239000002912 waste gas Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 3
- 239000002808 molecular sieve Substances 0.000 claims description 20
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 19
- 238000001179 sorption measurement Methods 0.000 claims description 15
- 230000001172 regenerating effect Effects 0.000 claims description 14
- 230000003197 catalytic effect Effects 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 239000011593 sulfur Substances 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
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- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
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- 238000011221 initial treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 methane hydrocarbons Chemical class 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 238000001824 photoionisation detection Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 239000000443 aerosol Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
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- 150000002429 hydrazines Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 231100000400 irritating Toxicity 0.000 description 1
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- 150000002576 ketones Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
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- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
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Landscapes
- Incineration Of Waste (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to the technical field of industrial waste gas treatment, in particular to a natural gas emission reduction system. The natural gas emission reduction system comprises at least two VOCs waste gas treatment units, VOCs discharge pipes, VOCs circulation main pipes and controllers, wherein the VOCs discharge pipes are arranged in parallel, the VOCs circulation main pipes are communicated with the VOCs discharge pipes, each VOCs waste gas treatment unit comprises a heat accumulating type oxidation furnace body for treating VOCs, the top of the heat accumulating type oxidation furnace body is connected with an RTO burner through a pipeline, and the RTO burner is connected with a natural gas pipeline for conveying natural gas; the heat accumulating type oxidation furnace body is also connected with VOCs circulation branch pipes communicated with the VOCs circulation main pipe, each VOCs circulation branch pipe is provided with an electric stop valve for controlling the on-off of the VOCs, and the VOCs circulation main pipe is provided with a VOCs on-line monitor for detecting the discharge amount of the VOCs; the controller is in communication connection with the VOCs on-line monitoring instrument and is in control connection with the electric stop valve so as to control the corresponding VOCs waste gas treatment unit to carry out treatment work, and then the corresponding consumption of natural gas is saved.
Description
Technical Field
The utility model relates to the technical field of industrial waste gas treatment, in particular to a natural gas emission reduction system.
Background
Volatile organic compounds, commonly referred to as VOCs, are generally classified into non-methane hydrocarbons, oxygenated organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, sulfur-containing organic compounds, and the like. VOCs are involved in the formation of ozone and secondary aerosols in the atmospheric environment, which have an important impact on regional atmospheric ozone pollution, PM2.5 pollution. Most VOCs have unpleasant and characteristic odors, and are toxic, irritating, teratogenic and carcinogenic, especially benzene, toluene and formaldehyde, which can cause serious harm to human health. VOCs are important precursors for causing city dust haze and photochemical smog, and are mainly derived from the processes of coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and use and the like.
At present, the method for treating VOCs waste gas by using an RTO (regenerative thermal oxidation furnace) regenerative combustion method is a common method, and compared with the traditional catalytic combustion method, the RTO has the advantages of about 95% of thermal efficiency, less system maintenance work, higher operation safety and reliability, capability of replacing or cleaning a heat accumulator, capability of comprehensively removing organic sediment and smaller pressure loss of the device. The burners used for RTO are typically burning natural gas, which plays an increasingly important role in energy supply as a low carbon energy source in fossil energy sources. The existing factory is used for solving the problem of processing the waste gas of the large-displacement VOCs, more than two RTO devices are usually arranged, each group works independently, the VOCs are opened together during processing, the waste gas is purified, but the waste gas is always supplied and required through long-time operation, namely, the waste gas of the VOCs exhausted by the factory is always not required to be provided with the RTO devices, the usage amount of the natural gas is increased, and certain waste is caused.
Disclosure of Invention
In view of the above, the utility model aims to provide a natural gas emission reduction system to solve the technical problem that the natural gas is easy to waste when VOCs waste gas is treated in the existing factory.
In order to solve the problems, the natural gas emission reduction system provided by the utility model adopts the following technical scheme:
the utility model provides a natural gas emission reduction system, includes at least two VOCs exhaust gas treatment units that arrange in parallel, is used for discharging the VOCs exhaust pipe, VOCs circulation main pipe and the controller that VOCs exhaust pipe communicates, every VOCs exhaust gas treatment unit all includes the regenerative oxidation furnace body that is used for handling VOCs, and the top of regenerative oxidation furnace body is connected with the RTO combustor through the pipeline, and the RTO combustor is connected with the natural gas pipeline that is used for carrying natural gas;
each heat accumulating type oxidation furnace body is also connected with a VOCs circulation branch pipe communicated with the VOCs circulation main pipe, each VOCs circulation branch pipe is provided with an electric stop valve for controlling the on-off of the VOCs, and the VOCs circulation main pipe is provided with a VOCs on-line monitor for detecting the discharge amount of the VOCs;
the controller is in communication connection with the VOCs on-line monitor and in control connection with the electric stop valve, and the controller controls the corresponding electric stop valve to be opened or closed according to the VOCs emission monitored by the VOCs on-line monitor so as to control the corresponding VOCs waste gas treatment unit to carry out treatment work.
The beneficial effects are that: according to the natural gas emission reduction system, the mutually independent VOCs treatment units are connected into a whole, and the opening and closing of the electric stop valves are reasonably controlled by detecting the emission of VOCs waste gas, so that the corresponding VOCs treatment units are controlled to be put into or stop working, the phenomenon that the supply is greater than the demand is avoided, the consumption of natural gas is reduced, the energy is saved, and the energy waste is avoided. In addition, each VOCs processing unit can be alternatively used under the control of the controller, so that the service life is prolonged.
Furthermore, the VOCs waste gas treatment unit further comprises a chimney and a heat exchanger, wherein the air inlet end at one side of the RTO burner is also connected with a combustion-supporting pipeline, and the combustion-supporting pipeline is connected with an RTO combustion-supporting fan in series; the bottom of the regenerative oxidation furnace body is connected with an RTO rotary valve, an inlet end at one side of the RTO rotary valve is connected with an RTO main fan through a pipeline, an inlet end of the RTO main fan is connected with the VOCs through a branch pipe, an outlet end at the other side of the RTO rotary valve is connected with the heat exchanger through a pipeline, and an inlet end at the bottom of the RTO rotary valve is connected with an RTO cleaning fan through a pipeline; one side of the top of the heat accumulating type oxidation furnace body, which is back to the RTO burner, is connected with a chimney through a pipeline, the top of the heat accumulating type oxidation furnace body is positioned below the position, which is connected with the chimney, of the heat accumulating type oxidation furnace body and is connected with the heat exchanger through a pipeline, and the controller is in control connection with the RTO combustion-supporting fan, the RTO main fan, the RTO rotary valve and the RTO cleaning fan.
The beneficial effects are that: is favorable for realizing the full decomposition of VOCs waste gas in the furnace body of the regenerative oxidation furnace.
Further, each VOCs waste gas treatment unit further comprises a catalytic oxidation furnace body, a CTO catalyst is arranged in the catalytic oxidation furnace body, one side end of the heat exchanger is connected with the catalytic oxidation furnace body through a pipeline, the other side of the heat exchanger is connected with a CTO main fan through a pipeline, and one side outlet end of the CTO main fan is connected with the chimney through a pipeline.
The beneficial effects are that: the heat accumulating type oxidation furnace body and the catalytic oxidation furnace body are combined, so that the problem that a single heat accumulating type oxidation furnace body cannot meet the requirement of emission standard can be solved, VOCs waste gas can be subjected to secondary purification treatment, the emission concentration of the VOCs is effectively reduced, and the purification efficiency is improved.
Further, the natural gas pipeline is connected in series with a molecular sieve adsorption box for adsorbing sulfur impurities in the natural gas, and the upstream and downstream of the natural gas pipeline are connected in series with natural gas on-off valves.
The beneficial effects are that: sulfur impurities in the natural gas can be removed, so that the gas entering the regenerative oxidation furnace body for combustion is free of sulfur, and the natural gas is fully combusted.
Further, one side of the molecular sieve adsorption box is connected with a superheated steam inlet pipe, the other side of the molecular sieve adsorption box is connected with a superheated steam outlet pipe, and the superheated steam outlet pipe is connected with the heat exchanger.
The beneficial effects are that: the superheated steam enters the molecular sieve adsorption box and then can regenerate the molecular sieve, sulfur impurities in the molecular sieve are regenerated, the steam with the sulfur impurities enters the heat exchanger from the molecular sieve adsorption box, heat is transferred to the VOCs waste gas after primary treatment, and the temperature of the VOCs waste gas is raised, so that the secondary decomposition of the VOCs waste gas in the catalytic oxidation furnace body is facilitated.
Preferably, the heat exchanger is a plate heat exchanger.
The beneficial effects are that: the plate heat exchanger has high heat transfer coefficient, small metal consumption and easy disassembly, washing and repair.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the utility model are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic diagram of a natural gas abatement system of the present utility model;
fig. 2 is a schematic diagram of the configuration of the VOCs exhaust treatment unit of fig. 1.
Reference numerals illustrate:
the device comprises a 1-heat accumulating type oxidation furnace body, a 2-catalytic oxidation furnace body, a 3-RTO main fan, a 4-RTO cleaning fan, a 5-RTO combustion-supporting fan, a 6-RTO combustor, a 7-natural gas pipeline, an 8-chimney, a 9-heat exchanger, a 10-RTO rotary valve, an 11-first electric stop valve, a 12-second electric stop valve, a 14-CTO catalyst, a 15-CTO main fan, a 16-VOCs on-line monitor, a 17-VOCs discharge pipe, an 18-VOCs flow main pipe, a 19-VOCs flow branch pipe, a 20-molecular sieve adsorption box, a 21-natural gas on-off valve, a 22-superheated steam inlet pipe and a 23-superheated steam outlet pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The principles and spirit of the present utility model are explained in detail below with reference to several representative embodiments thereof.
The utility model provides an embodiment 1 of a natural gas emission reduction system:
as shown in fig. 1 and 2, the natural gas emission reduction system includes two VOCs exhaust gas treatment units arranged in parallel, a VOCs discharge pipe 17 for discharging VOCs, a VOCs flow main pipe 18 communicating with the VOCs discharge pipe 17, and a controller. The two VOCs exhaust gas treatment units have the same structure, and in this embodiment, only the structure of one VOCs exhaust gas treatment unit is taken as an example for explanation. Here, it should be noted that the parallel arrangement means that two VOCs exhaust gas treatment units may work together, or one may work and the other may stand by, but is realized by control of a controller. In addition, the quantity of VOCs exhaust-gas treatment units can be reasonably input according to actual requirements of factories and corresponding occupied areas.
Specifically, as shown in fig. 1, the VOCs exhaust gas treatment unit includes a regenerative oxidation furnace body 1, a catalytic oxidation furnace body 2, a chimney 8, and a heat exchanger 9. Wherein, the top inlet end of one side of the regenerative oxidation furnace body 1 is connected with an RTO burner 6 through a pipeline, and one side of the top of the regenerative oxidation furnace body 1, which is back to the RTO burner 6, is connected with a chimney 8 through a pipeline. The RTO burner 6 is connected with a natural gas pipeline 7 for conveying natural gas, a molecular sieve adsorption box 20 for adsorbing sulfur impurities in the natural gas is connected in series on the natural gas pipeline 7, a natural gas on-off valve 21 is connected in series on the upstream and downstream of the natural gas pipeline 7, and a filter is further arranged on the natural gas pipeline 7 and used for filtering solid impurities. The molecular sieve adsorption tank 20 is a prior art, and is provided with a molecular sieve adsorbent, and the structure and the working principle thereof will not be described in detail herein. The air inlet end at one side of the RTO burner 6 is also connected with a combustion-supporting pipeline, the combustion-supporting pipeline is connected with an RTO combustion-supporting fan 5 in series, and the combustion-supporting effect of the organic waste gas is realized through the RTO combustion-supporting fan 5. The heat exchanger 9 adopts a common plate heat exchanger in the prior art, and the plate heat exchanger has high heat transfer coefficient and small metal consumption and is easy to disassemble, wash and repair.
An RTO rotary valve 10 is arranged on a pipeline connected with the bottom of the regenerative oxidation furnace body 1, one side inlet end of the RTO rotary valve 10 is connected with an RTO main fan 3 through a pipeline, the other side outlet end of the RTO rotary valve 10 is connected with a heat exchanger 9 through a pipeline, and the bottom inlet end of the RTO rotary valve 10 is connected with an RTO cleaning fan 4 through a pipeline.
The top of the regenerative oxidation furnace body 1 is positioned below the connection position of the regenerative oxidation furnace body and the chimney 8 and is connected with the heat exchanger 9 through a pipeline, one side outlet end of the heat exchanger 9 is connected with the catalytic oxidation furnace body 2 through a pipeline, and a CTO catalyst 14 is arranged in the catalytic oxidation furnace body 2. The other side of the heat exchanger 9 is connected with a CTO main fan 15 through a pipeline, and the outlet end of one side of the CTO main fan 15 is connected with a chimney 8 through a pipeline.
In addition, one side of the molecular sieve adsorption box 20 is connected with a superheated steam inlet pipe 22, the temperature of the introduced superheated steam is 200-300 ℃, the other side of the molecular sieve adsorption box is connected with a superheated steam outlet pipe 23, and the superheated steam outlet pipe 23 is connected with the heat exchanger 9. In this way, after superheated steam enters the molecular sieve adsorption box 20, the molecular sieve can be regenerated, sulfur impurities in the molecular sieve are regenerated, steam with the sulfur impurities enters the heat exchanger 9 from the molecular sieve adsorption box 20, heat is transferred to the primary treated VOCs waste gas, and the temperature of the primary treated VOCs waste gas is raised, so that the secondary decomposition of the VOCs waste gas in the catalytic oxidation furnace body 2 is facilitated.
The heat accumulating type oxidation furnace body 1 in each VOCs waste gas treatment unit is also connected with a VOCs circulation branch pipe 19 communicated with a VOCs circulation main pipe 18, wherein one VOCs circulation branch pipe is provided with a first electric stop valve 11 for controlling the on-off of the VOCs, and the other VOCs circulation branch pipe is provided with a second electric stop valve 12 for controlling the on-off of the VOCs; the VOCs on-line monitor 16 for detecting the discharge amount of VOCs is installed on the VOCs circulation main pipe 18. In this embodiment, the VOCs on-line monitor 16 is a fixed pollution source PID-TVOC on-line monitor in the prior art, and adopts the PID photoionization detection principle to realize the full-accurate monitoring of the total amount of VOCs in the fixed pollution source. The VOCs monitored contain aromatics: benzene, naphthalene, nitrobenzene, chlorobenzene, and the like; saturated hydrocarbons and unsaturated hydrocarbons: alkanes, alkenes, cyclohexanes, and the like; ketones, aldehydes, ethers; amines; halogenated hydrocarbons; thiocarbons, alcohols; esters; hydrazines, and the like. The method is widely applied to quantitative analysis of the total amount of the organic matters discharged by various industrial pollution sources, and plays a role in alarming in time. The system analysis flow is as follows: after the sample is extracted by the sampling tube, the sample is removed by an electric condenser after fine dust removal and filtration, so that the sample is prevented from being condensed in a rear end pipeline, and the total VOCs are analyzed by an analysis unit after constant pressure and constant flow adjusting device.
Before the VOCs waste gas treatment unit works, the VOCs emission is monitored by the VOCs on-line monitor 16, and when the monitored VOCs emission is lower than a set value, the controller only controls one of the electric stop valves to be opened, and the other electric stop valve is kept closed; when the monitored VOCs discharge amount is higher than the set value, the first and second electric shut-off valves 11 and 12 are controlled by the controller to be opened simultaneously so that the two VOCs exhaust gas treatment units are operated simultaneously. The two sets of VOCs waste gas treatment units can be used alternately, so that the running loss of equipment is reduced. When the VOCs waste gas treatment unit works, the RTO combustion-supporting fan 5 and the RTO burner 6 heat the inside of the heat accumulating type oxidation furnace body 1 to about 850 ℃, and then the RTO main fan 3 conveys VOCs generated by the production line to the heat accumulating type oxidation furnace body 1 in proportion through the RTO rotary valve 10 for first decomposition treatment. The VOCs after primary treatment are conveyed to the heat exchanger 9 by the RTO cleaning fan 4, are subjected to heat exchange with the tail gas after secondary treatment, are heated and enter the catalytic oxidation furnace body 2, and are subjected to secondary catalytic decomposition treatment under the action of the CTO catalyst 14 so as to reduce the concentration of the VOCs and reach the emission standard. The treated VOCs are discharged to the atmosphere through a chimney 8 by a CTO main blower 15.
According to the natural gas emission reduction system, the mutually independent VOCs treatment units are connected into a whole, and the opening and closing of the electric stop valves are reasonably controlled by detecting the emission of VOCs waste gas, so that the corresponding VOCs treatment units are controlled to be put into or stop working, the phenomenon that the supply is greater than the demand is avoided, the consumption of natural gas is reduced, the energy is saved, and the energy waste is avoided.
Those skilled in the art will also appreciate from the foregoing description of the present specification that terms such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," "outer" (which may be used interchangeably with the text employed in an individual case) and the like, which refer to an orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings of the present specification, which are merely for the purpose of facilitating the description of the present utility model and simplifying the description, and do not explicitly or implicitly refer to devices or elements that must have, be constructed and operated in the particular orientation, and therefore the above orientation or positional relationship terms should not be interpreted or construed as limiting the present utility model.
In addition, in the description of the present specification, the meaning of "plurality" means at least two, for example, two, three or more, etc., unless specifically defined otherwise.
Claims (6)
1. The natural gas emission reduction system is characterized by comprising at least two VOCs waste gas treatment units, VOCs discharge pipes, VOCs circulation main pipes and controllers, wherein the VOCs waste gas treatment units are arranged in parallel, the VOCs circulation main pipes are communicated with the VOCs discharge pipes, each VOCs waste gas treatment unit comprises a heat accumulating type oxidation furnace body for treating the VOCs, the top of the heat accumulating type oxidation furnace body is connected with an RTO (real-time oxygen) burner through a pipeline, and the RTO burner is connected with a natural gas pipeline for conveying natural gas;
each heat accumulating type oxidation furnace body is also connected with a VOCs circulation branch pipe communicated with the VOCs circulation main pipe, each VOCs circulation branch pipe is provided with an electric stop valve for controlling the on-off of the VOCs, and the VOCs circulation main pipe is provided with a VOCs on-line monitor for detecting the discharge amount of the VOCs;
the controller is in communication connection with the VOCs on-line monitor and in control connection with the electric stop valve, and the controller controls the corresponding electric stop valve to be opened or closed according to the VOCs emission monitored by the VOCs on-line monitor so as to control the corresponding VOCs waste gas treatment unit to carry out treatment work.
2. The natural gas emission reduction system according to claim 1, wherein the VOCs waste gas treatment unit further comprises a chimney and a heat exchanger, wherein a combustion-supporting pipeline is further connected to an air inlet end of one side of the RTO burner, and the combustion-supporting pipeline is connected with an RTO combustion-supporting fan in series; the bottom of the regenerative oxidation furnace body is connected with an RTO rotary valve, an inlet end at one side of the RTO rotary valve is connected with an RTO main fan through a pipeline, an inlet end of the RTO main fan is connected with the VOCs through a branch pipe, an outlet end at the other side of the RTO rotary valve is connected with the heat exchanger through a pipeline, and an inlet end at the bottom of the RTO rotary valve is connected with an RTO cleaning fan through a pipeline; one side of the top of the heat accumulating type oxidation furnace body, which is back to the RTO burner, is connected with a chimney through a pipeline, the top of the heat accumulating type oxidation furnace body is positioned below the position, which is connected with the chimney, of the heat accumulating type oxidation furnace body and is connected with the heat exchanger through a pipeline, and the controller is in control connection with the RTO combustion-supporting fan, the RTO main fan, the RTO rotary valve and the RTO cleaning fan.
3. The natural gas emission reduction system according to claim 2, wherein each VOCs exhaust gas treatment unit further comprises a catalytic oxidation furnace body, a CTO catalyst is arranged in the catalytic oxidation furnace body, one side end of the heat exchanger is connected with the catalytic oxidation furnace body through a pipeline, the other side of the heat exchanger is connected with a CTO main fan through a pipeline, and one side outlet end of the CTO main fan is connected with the chimney through a pipeline; the controller is in control connection with the CTO main fan.
4. A natural gas emission reduction system as defined in claim 2 or 3, wherein the natural gas pipeline is connected in series with a molecular sieve adsorption box for adsorbing sulfur impurities in the natural gas, and the upstream and downstream of the natural gas pipeline are connected in series with natural gas on-off valves.
5. The natural gas abatement system of claim 4, wherein one side of the molecular sieve adsorption tank is connected with a superheated steam inlet pipe, and the other side of the molecular sieve adsorption tank is connected with a superheated steam outlet pipe, and the superheated steam outlet pipe is connected with the heat exchanger.
6. A natural gas abatement system according to claim 2 or 3, wherein the heat exchanger is a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321864342.9U CN220321324U (en) | 2023-07-14 | 2023-07-14 | Natural gas emission reduction system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321864342.9U CN220321324U (en) | 2023-07-14 | 2023-07-14 | Natural gas emission reduction system |
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| CN220321324U true CN220321324U (en) | 2024-01-09 |
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| CN202321864342.9U Active CN220321324U (en) | 2023-07-14 | 2023-07-14 | Natural gas emission reduction system |
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