CN103159231A - Device for guiding air flow on urea pyrolysis reactor - Google Patents
Device for guiding air flow on urea pyrolysis reactor Download PDFInfo
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Abstract
The invention relates to a device for guiding air flow on a urea pyrolysis reactor. The urea pyrolysis reactor comprises a reactor inlet, a reactor body and a reactor outlet. The reactor body is provided with a spray gun which is used for providing urea solution. The device for guiding the air flow is arranged in the reactor inlet and / or in the reactor body. The device for guiding the air flow at least comprises a rotational flow device for guiding the air flow to form rotational flow. A certain distance exists between the rotational flow device and the inner wall of the reactor, and a ring-shaped open region is formed. The device comprises the rotational flow device and the ring-shaped open region, wherein the middle portion of the rotational flow device guides the air flow to form the rotational flow and slows down a flow rate, the peripheral portion of the ring-shaped open region guides the air flow to flow in a high-speed mode, reaction time and dwell time are prolonged, the urea solution is prevented from crystallizing and adhering to the wall, and reaction efficiency is improved.
Description
Technical field
The present invention relates to urea pyrolysis and react field, the device of directing air flow on especially a kind of urea pyrolysis reactor.
Background technology
Oxynitride (NOx) is one of main atmospheric polluting material, enforcement along with strict environmental protection standard, flue gas denitrification system becomes one of requisite equipment of thermal power plant, selective catalytic reduction reaction (Selective CatalystReduction, abbreviation SCR) become the technology first-selection of power plant's denitration project with the high advantage of its denitration efficiency, obtained using more and more widely.In the SCR technology, the source of reductive agent NH3 has 3 kinds: liquefied ammonia, ammoniacal liquor and urea, and select urea as reductive agent, have safe, wide material sources, be easy to the characteristics such as transportation and storage, be widely used at field of Environment Protection.
The decomposition of urea is mainly carried out in pyrolysis reactor, pyrolysis reactor is the complete empty container in an inside, warm air enters from entrance, urea provides fully the injector that distributes to be injected in warm air through one to react, pyrolysis reactor partly is comprised of entrance, amplification section, body, contraction section, outlet etc.In order to increase ureaclastic reaction time, must reduce the flow velocity of hot blast in pyrolysis reactor, therefore be provided with on body top and amplify section, be used for amplifying the body diameter, thereby reach the purpose that reduces the warm air flow velocity.In traditional pyrolysis reactor design, adopt and amplify the requirement that this single method of body diameter reaches the pyrolytic reaction residence time, has certain limitation, perhaps entrance is set to Venturi tube structure, need long stable section, comprise that entrance reduces, throat, outlet flaring, length requirement is higher, owing to being subjected to on-the-spot space constraint, this method is for the more difficult realization of the design arrangement of large-scale reactor in Practical Project, and the reaction chamber of pyrolysis installation made by stainless steel, and the pyrolysis installation manufacturing cost of large volume is higher.
When air-flow enters reactor, there is no drainage system, can cause the air-flow skewness in pyrolysis reactor, because the urea decomposition reaction is completed in a short period of time, the time of generally only having several seconds, requirement to gas flowfield and temperature field is very high, if gas flowfield and temperature field skewness, urea just can not decompose fully, undecomposed urea can be on the tail pipe tube wall crystallization deposition, the increasing of urea crystals phenomenon can be caused the increase of maintenance number of times, serious also can the operation of urea pyrolysis system be impacted.
Disclose in patent documentation CN101574616A a kind of bicarbonate of ammonia ammonia processed pyrolysis oven, the described pyrolysis lower portion of furnace body four warm air inlet tubes that distributed, the deflection of described four warm air inlet tubes has certain spin intensity after arranging and making warm air enter pyrolysis oven, make the fluid field in furnace degree of filling good, uniformity of temperature profile in pyrolysis oven.Yet because bicarbonate of ammonia used is solid particulate, for being decomposed, described solid particulate needs fierce percussion movement, so the warm air in described pyrolysis oven need to be designed to rotational flow, and hot air inlet is located at the pyrolysis oven bottom, the swirling eddy of bottom guarantees that solid particulate does not land, and urea ammonia processed urea used is solution, and what need is the warm air that has steady flow speed from top to bottom, and therefore the pyrolysis installation of above-mentioned bicarbonate of ammonia is not suitable for the pyrolysis of urea.
the disclosed pyrolysis installation for urea ammonia processed of patent documentation CN201907975U, comprise the gas inlet, inside is provided with reaction chamber and the pneumatic outlet of spray gun, described gas inlet is arranged at described reaction chamber top, described pneumatic outlet is arranged at described reaction chamber bottom, also comprise the sieve plate type flow distributor that is arranged at the inner and described spray gun of described reaction chamber top, inner and be provided with on spray gun top the sieve plate type flow distributor that is provided with a plurality of perforates at reaction chamber, make the hot gas flow that enters pyrolysis installation in diffusion process, obtained quickly the hot gas flow flow field that evenly flows downward, improved the positioned opposite position of spray gun, make pyrolysis installation that shorter length requirement be arranged, effectively reduce the height of pyrolysis installation, but, air-flow must be by entering with very multiporous orifice plate, resistance is very large, can the build-up of pressure loss.
Given this present invention is proposed.
Summary of the invention
Purpose of the present invention provides the device of directing air flow on a kind of urea pyrolysis reactor for overcoming the deficiencies in the prior art, is provided with swirl-flow devices in the centre, forms eddy flow to extend the residence time after making gas flow into reactor; Be annular open base area around swirl-flow devices, the gas that the guiding of this annular region enters is in reactor wall place's formation direct current high velocity, prevents that the drop crystallization from gluing wall.
In order to realize this purpose, the present invention adopts following technical scheme:
The device of directing air flow on a kind of urea pyrolysis reactor, described urea pyrolysis reactor comprises reactor inlet, reactor body and reactor outlet, the spray gun of the solution of supplying urea is set on described reactor body, the described device that is provided with directing air flow in reactor inlet and/or reactor body, the device of described directing air flow comprises that at least a guiding gas forms the swirl-flow devices of eddy flow, this device has certain distance apart from reactor wall, forms a ring-type open base area.
Described swirl-flow devices comprises the eddy current curved surface bucket of at least two spirane structures on a cylinder and column side face, and the helical centre of described eddy current curved surface bucket arranges along the column axis direction.
Described cylinder closed at both ends, a plurality of eddy current curved surface buckets rotate in the same direction and evenly distribute at column side face, and described eddy current curved surface bucket is for comprising at least the spirane structure of 0.5 pitch.
Described a plurality of eddy current curved surface bucket shape is identical, and the eddy current curved surface bucket is arranged on column side face by cylinder top to cylinder bottom.
The number of described eddy current curved surface bucket is 4 to 10, preferred 6.
Described eddy current curved surface bucket outermost end arranges the cylindrical surface coaxial with column side face, and the ratio of the diameter of described cylinder and the diameter on described cylindrical surface is less than 1:2.
The air input of described reactor inlet is Q, and the width of described eddy current curved surface bucket is W, and the width of described eddy current curved surface bucket is H, Q/W
2=N, N are certain value; W/H at 1:2 between 2:1.
The ratio of the reactor inlet at the device place of the diameter on described cylindrical surface (9) and directing air flow or the diameter of reactor body at 1:2 between 4:5.
Arrange between described reactor inlet and reactor body and amplify section, the described device that directing air flow is set in section and/or reactor inlet and/or reactor body that amplifies, the device of described directing air flow is with the inwall assembly connection that amplifies section and/or reactor inlet and/or reactor body or be welded to connect.
The device of described directing air flow is arranged on the top of the spray gun of reactor body.
After adopting technical solutions according to the invention, bring following beneficial effect:
1, swirl-flow devices is set, forms eddy flow after the guiding hot gas flow enters reactor, to extend the residence time.
2, swirl-flow devices adopts a plurality of eddy current curved surface buckets, and air-flow is even.
3, the cylinder of closed at both ends is set in the middle of swirl-flow devices, and middle cylinder plays the effect of guiding gas air inlet, and gas with not having cylinder to compare, can be avoided the phase mutual interference between a plurality of inlet mouths around the cylinder rotating inlet.
4, gas that the guiding of ring-type open base area enters is set around swirl-flow devices and forms the direct current high velocity at the reactor wall place, prevent that the drop crystallization from gluing wall.
5, efficient improves, and reaction efficiency improves more than 14%.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Description of drawings
Fig. 1: urea pyrolysis reactor structure iron of the present invention
Fig. 2: the structure drawing of device of directing air flow in urea pyrolysis reactor of the present invention
Fig. 3: swirl-flow devices structure iron of the present invention
Wherein: 1, reactor inlet, 2, amplify section, 3, spray gun, 4, reactor body, 5, contraction section, 6, reactor outlet, 7, cylinder, 8, the eddy current curved surface bucket, 9, the cylindrical surface, 10, the ring-type open base area, the device of 11 directing air flows, 12, swirl-flow devices.
Embodiment
As shown in Figure 1, the device of directing air flow on a kind of urea pyrolysis reactor of the present invention, described urea pyrolysis reactor comprises reactor inlet 1, reactor body 4 and reactor outlet 6, the spray gun 3 of the solution of supplying urea is set on described reactor body 4, the described device 11 that is provided with directing air flow in reactor inlet 1 and/or reactor body 4, the device 11 of described directing air flow comprises that at least a guiding gas forms the swirl-flow devices 12 of eddy flow, this swirl-flow devices 12 has certain distance apart from reactor wall, forms a ring-type open base area.Can also be provided with between described reactor inlet 1, reactor body 4 and amplify section 2, can also be provided with contraction section 5 between described reactor body 4, reactor outlet 6,
Described swirl-flow devices 12 comprises the eddy current curved surface bucket 8 of at least two spirane structures on a cylinder 7 and column side face, and the helical centre of described eddy current curved surface bucket 8 is along cylinder 7 axis direction settings.Described cylinder 7 closed at both ends, a plurality of eddy current curved surface buckets 8 rotate in the same direction in cylinder 7 sides and evenly distribute, and described eddy current curved surface bucket (8) is for comprising at least the spirane structure of 0.5 pitch.Middle cylinder 7 plays the effect of guiding gas air inlet, and gas with not having cylinder 7 to compare, can be avoided the phase mutual interference between a plurality of inlet mouths around cylinder 7 rotating inlets.
Described a plurality of eddy current curved surface bucket 8 shapes are identical, and eddy current curved surface bucket 8 is arranged on column side face by cylinder 7 tops to cylinder bottom.The number of described eddy current curved surface bucket 8 is 4 to 10, preferred 6.
The cylindrical surface (9) that described eddy current curved surface bucket (8) outermost end setting is coaxial with column side face, this cylindrical surface 9 is between swirl-flow devices 12 and ring-type open base area 10, be used for isolation vortex gas-flow and straight-flow air, the ratio of the diameter on the diameter of described cylinder and described cylindrical surface 9 is less than 1:2.These cylindrical surface 9 isolated DC high velocity airs and slow vortex gas-flow have been avoided the phase mutual interference between air-flow.
The air input of described reactor inlet 1 is Q, and the width of described eddy current curved surface bucket 8 is W, and the width of described eddy current curved surface bucket 8 is H, Q/W
2=N, N are certain value, and the N value is relevant with the distribution form in flow field, determine according to different reactors and different Flow Field Distribution forms; W/H at 1:2 between 2:1.
The ratio of the reactor inlet 1 at the diameter on described cylindrical surface 9 and the device of directing air flow 11 places or the diameter of reactor body 4 at 1:2 between 4:5.
The device 11 of described directing air flow is arranged on reactor inlet 1 or amplifies section 2 or reactor body 4, preferably be arranged on reactor inlet 1 place, this device comprises that the middle portion directing air flow forms eddy flow slow down swirl-flow devices 12 and the swiftly flowing ring-type open base area 10 of peripheral portion directing air flow of flow velocity.
The height of described eddy current curved surface bucket 8 is consistent with the height of cylinder 7, and upper and lower ends is concordant respectively.
Described amplification section 2 and/or reactor inlet 1 and/or the interior device 11 that directing air flow is set of reactor body 4, the device 11 of described directing air flow is with the inwall assembly connection that amplifies section 2 and/or reactor inlet 1 and/or reactor body 4 or be welded to connect.
The device 11 of described directing air flow should be arranged on the top of spray gun 3 when being arranged in reactor body 4.
Warm air is heated to approximately 600 ℃ of left and right by external heat source, by entering reactor body after reactor inlet, amplification section, during by reactor inlet, due to the device that directing air flow is installed in reactor inlet, the guiding function of the swirl-flow devices by middle portion enters the warm air of swirl-flow devices, guiding function by the eddy current curved surface bucket, the middle part forms slow vortex gas-flow, and by the guiding function of peripheral ring-type open base area, the position forms the High-speed DC air-flow on every side.
after thereby warm air enters and amplifies section and reactor body, inertia when entering, make warm air form the middle slow eddy flow that is, be the flow field of High-speed DC on every side, be connected to the two-way entrance on spray gun: the one tunnel is the urea soln that configures, one the tunnel is atomizing air, urea soln by lance ejection in reactor body, react in the warm air of urea soln in reactor body of atomizing, because warm air forms the middle slow eddy flow that is, be the flow field of High-speed DC on every side, middle slow vortex gas-flow can extend the time of stop, thereby react fully, High-speed DC air-flow on every side can form high velocity at the reactor body inwall, prevent that the urea soln crystallization from gluing wall, all right extruding center eddy flow district, the effective scope in the restriction Swirl inner circulating reflux district that causes.
Warm air before comparing is vertical passes through pyrolysis reactor, owing to forming eddy flow, in the situation that reactor body length is constant, increased the residence time of mixed airflow in reactor body, thereby be conducive to the abundant decomposition of urea, in the situation that the residence time is constant, can reduce the height of reactor body, thereby reduction manufacturing cost, form the High-speed DC air-flow on every side and can isolate internal solution and reactor wall, avoid internal solution contact reactor inwall to cause crystallization, affect reaction efficiency.
Under hot conditions, urea generation decomposition reaction, its chemical reaction is as follows:
CO(NH
2)
2→NH
3+HNCO
HNCO+H
2O→NH
3+CO
2
Resultant of reaction and warm air form mixed gas discharges through reactor outlet, then enters the SCR reactor.
Embodiment one
As shown in Figure 3, swirl-flow devices 12 of the present invention comprises the eddy current curved surface bucket 8 of 6 spirane structures on a cylinder 7 and cylinder 7 sides, the helical centre of described eddy current curved surface bucket 8 is along cylinder 7 axis direction settings, the height of described 6 eddy current curved surface buckets 8 is consistent with the height of cylinder 7, and upper and lower ends is concordant respectively.
Described cylinder 7 closed at both ends, middle cylinder 7 plays the effect of guiding gas air inlet, gas is around cylinder 7 rotating inlets, with not having cylinder 7 to compare, can avoid the phase mutual interference between a plurality of inlet mouths, a plurality of eddy current curved surface buckets 8 rotate in the same direction in cylinder 7 sides and evenly distribute, and are conducive to the even distribution of air-flow, and described eddy current curved surface bucket 8 is for comprising at least the spirane structure of 0.5 pitch.
Also can be regarded as an end of a strip thin plate is fixed, the other end along the strip thin plate perpendicular to the medullary ray of inboardend clockwise or counterclockwise reverse gradually the gradual change that certain angle obtains and turn round tabular spirane structure, described certain angle is determined with diameter by flow velocity, the height of entrance 1, the present embodiment is preferably turned round turnback, is the spirane structure of 0.5 pitch; After the medullary ray that plate is turned round in the gradual change of three above-mentioned identical spirane structures overlaps, position of center line arranges the cylinder of a closed at both ends, cylinder is turned round plate with three gradual changes and is divided into respectively two eddy current curved surface buckets, namely forms 6 the eddy current curved surface buckets 8 that sense of rotation is identical that evenly distribute on the side of cylinder 7.
Embodiment two
As shown in Figure 2, the device 11 of directing air flow of the present invention preferably is arranged in reactor inlet 1, and the device 11 of described directing air flow comprises that the middle portion directing air flow forms eddy flow slow down swirl-flow devices 12 and the swiftly flowing ring-type open base area 10 of peripheral portion directing air flow of flow velocity.
Between swirl-flow devices 12 and ring-type open base area 10, cylindrical surface 9 is set, cylindrical surface 9 isolated DC high velocity airs and slow vortex gas-flow have been avoided the phase mutual interference between air-flow.
The zone that surrounds in the middle of cylindrical surface 9 is that directing air flow forms the slow down swirl-flow devices 12 of flow velocity of eddy flow, and the zone between cylindrical surface 9 and reactor inlet 1 inwall is the swiftly flowing ring-type open base area 10 of directing air flow.
warm air enters after reactor inlet 1 device 11 through directing air flow, during through middle swirl-flow devices 12, gas passes through from the helical channel between eddy current curved surface bucket 8, the air-flow of slow eddy flow in the middle of forming, air-flow through High-speed DC around the guiding of ring-type open base area forms on every side, the residence time of the air-flow of the slow eddy flow in the middle of can making like this in reactor extends, react fully, the air-flow of High-speed DC prevents that with the spray reaction zone of inside and reactor body 4 isolation the drop crystallization from gluing wall on every side, all right extruding center eddy flow district, the effective scope in the restriction Swirl inner circulating reflux district that causes.
Embodiment three
The device 11 of directing air flow of the present invention can also be arranged in the amplification section 2 of reactor (not shown in FIG.), and the device 11 of described directing air flow comprises that the middle portion directing air flow forms eddy flow slow down swirl-flow devices 12 and the swiftly flowing ring-type open base area 10 of peripheral portion directing air flow of flow velocity.
Between swirl-flow devices 12 and ring-type open base area 10, cylindrical surface 9 is set, cylindrical surface 9 isolated DC high velocity airs and slow vortex gas-flow have been avoided the phase mutual interference between air-flow.
The zone that surrounds in the middle of cylindrical surface 9 is that directing air flow forms the slow down swirl-flow devices 12 of flow velocity of eddy flow, and cylindrical surface 9 and the zone of amplifying between section 2 inwalls are the swiftly flowing ring-type open base area 10 of directing air flow.
The device 11 of directing air flow and amplification section 2 assembly connections perhaps are welded to connect with amplification section 2 inwalls.
warm air enters the device 11 that amplifies the directing air flow in section 2 after entering reactor inlet 1, during through middle swirl-flow devices 12, gas passes through from the helical channel between eddy current curved surface bucket 8, the air-flow of slow eddy flow in the middle of forming, air-flow through High-speed DC around the guiding of ring-type open base area forms on every side, the residence time of the air-flow of the slow eddy flow in the middle of can making like this in reactor extends, react fully, the air-flow of High-speed DC prevents that with the spray reaction zone of inside and reactor body 4 isolation the drop crystallization from gluing wall on every side, all right extruding center eddy flow district, the effective scope in the restriction Swirl inner circulating reflux district that causes.
Embodiment four
The device 11 of directing air flow of the present invention can also be arranged in reactor body 4 (not shown in FIG.), but be arranged on the interior spray gun of reactor body 4 above position, the device 11 of described directing air flow comprises that the middle portion directing air flow forms eddy flow slow down swirl-flow devices 12 and the swiftly flowing ring-type open base area 10 of peripheral portion directing air flow of flow velocity.
Between swirl-flow devices 12 and ring-type open base area 10, cylindrical surface 9 is set, cylindrical surface 9 isolated DC high velocity airs and slow vortex gas-flow have been avoided the phase mutual interference between air-flow.
The zone that surrounds in the middle of cylindrical surface 9 is that directing air flow forms the slow down swirl-flow devices 12 of flow velocity of eddy flow, and the zone between cylindrical surface 9 and reactor body 4 inwalls is the swiftly flowing ring-type open base area 10 of directing air flow.
warm air enters to enter after reactor inlet 1 and amplifies section 2 and be amplified into the device 11 of the directing air flow of reactor body 4 through amplifying section 2 directing air flow sectional areas, during through middle swirl-flow devices 12, gas passes through from the helical channel between eddy current curved surface bucket 8, the air-flow of slow eddy flow in the middle of forming, air-flow through High-speed DC around the guiding of ring-type open base area forms on every side, the residence time of the air-flow of the slow eddy flow in the middle of can making like this in reactor extends, react fully, the air-flow of High-speed DC prevents that with the spray reaction zone of inside and reactor body 4 isolation the drop crystallization from gluing wall on every side, all right extruding center eddy flow district, the effective scope in the restriction Swirl inner circulating reflux district that causes.
Embodiment five
The device 11 of directing air flow of the present invention can also be arranged on simultaneously reactor inlet 1, amplify two or three structures interior (not shown in FIG.) in section 2 and reactor body 4, will be arranged on spray gun above position but be arranged on to make in reactor body 4, the device 11 of described directing air flow comprises that the middle portion directing air flow forms eddy flow slow down swirl-flow devices 12 and the swiftly flowing ring-type open base area 10 of peripheral portion directing air flow of flow velocity.
Between swirl-flow devices 12 and ring-type open base area 10, cylindrical surface 9 is set, cylindrical surface 9 isolated DC high velocity airs and slow vortex gas-flow have been avoided the phase mutual interference between air-flow.
The zone that surrounds in the middle of cylindrical surface 9 is that directing air flow forms the slow down swirl-flow devices 12 of flow velocity of eddy flow, and cylindrical surface 9 and reactor inlet 1 or the zone of amplifying between section 2 or reactor body 4 inwalls are the swiftly flowing ring-type open base area 10 of directing air flow.
The device 11 of directing air flow is set simultaneously, better the formation two-dimensional flow field of directing air flow in a plurality of structures.
The device 11 of directing air flow is with reactor inlet 1 or amplify section 2 or reactor body 4 assembly connections, perhaps with reactor inlet 1 or amplify section 2 or reactor body 4 inwalls are welded to connect.
warm air enters after reactor inlet 1 device 11 through directing air flow, during through middle swirl-flow devices 12, gas passes through from the helical channel between eddy current curved surface bucket 8, the air-flow of slow eddy flow in the middle of forming, air-flow through High-speed DC around the guiding of ring-type open base area forms on every side, the residence time of the air-flow of the slow eddy flow in the middle of can making like this in reactor extends, react fully, the air-flow of High-speed DC prevents that with the spray reaction zone of inside and reactor body 4 isolation the drop crystallization from gluing wall on every side, all right extruding center eddy flow district, the effective scope in the restriction Swirl inner circulating reflux district that causes.
The above is only the preferred embodiment of the present invention, should be pointed out that for the ordinary skill in the art, not breaking away under principle of the invention prerequisite, can also make various deformation and improvement, and this also should be considered as protection scope of the present invention.
Claims (10)
1. the device of directing air flow on a urea pyrolysis reactor, described urea pyrolysis reactor comprises reactor inlet (1), reactor body (4) and reactor outlet (6), the upper spray gun (3) that the solution of supplying urea is set of described reactor body (4), it is characterized in that: the described device (11) that is provided with directing air flow in reactor inlet (1) and/or reactor body (4), the device of described directing air flow (11) comprises that at least a guiding gas forms the swirl-flow devices (12) of eddy flow, this swirl-flow devices (12) has certain distance apart from reactor wall, form a ring-type open base area.
2. the device of directing air flow on urea pyrolysis reactor according to claim 1, it is characterized in that: described swirl-flow devices (12) comprises the eddy current curved surface bucket (8) of at least two spirane structures on a cylinder (7) and column side face, and the helical centre of described eddy current curved surface bucket (8) is along cylinder (7) axis direction setting.
3. the device of directing air flow on urea pyrolysis reactor according to claim 2, it is characterized in that: described cylinder (7) closed at both ends, a plurality of eddy current curved surface buckets (8) rotate in the same direction in cylinder (7) side and evenly distribute, and described eddy current curved surface bucket (8) is for comprising at least the spirane structure of 0.5 pitch.
4. the device of directing air flow on urea pyrolysis reactor according to claim 3, it is characterized in that: described a plurality of eddy current curved surface buckets (8) shape is identical, and eddy current curved surface bucket (8) is arranged on column side face by cylinder (7) top to cylinder bottom.
5. the device of directing air flow on urea pyrolysis reactor according to claim 4, it is characterized in that: the number of described eddy current curved surface bucket (8) is 4 to 10, preferred 6.
6. the device of directing air flow on urea pyrolysis reactor according to claim 3, it is characterized in that: the cylindrical surface (9) that described eddy current curved surface bucket (8) outermost end setting is coaxial with column side face, the ratio of the diameter of the diameter of described cylinder and described cylindrical surface (9) is less than 1:2.
7. the device of directing air flow on urea pyrolysis reactor according to claim 3, it is characterized in that: the air input of described reactor inlet (1) is Q, the width of described eddy current curved surface bucket (8) is W, and the width of described eddy current curved surface bucket (8) is H, Q/W
2=N, N are certain value; W/H at 1:2 between 2:1.
8. the device of directing air flow on urea pyrolysis reactor according to claim 6 is characterized in that: the ratio of the reactor inlet (1) at device (11) place of the diameter of described cylindrical surface (9) and directing air flow or the diameter of reactor body (4) at 1:2 between 4:5.
9. the device of directing air flow on urea pyrolysis reactor according to claim 1, it is characterized in that: arrange between described reactor inlet (1) and reactor body (4) and amplify section (2), the described device (11) that directing air flow is set in section (2) and/or reactor inlet (1) and/or reactor body (4) that amplifies, the device of described directing air flow (11) is with the inwall assembly connection that amplifies section (2) and/or reactor inlet (1) and/or reactor body (4) or be welded to connect.
10. the device of directing air flow on urea pyrolysis reactor according to claim 9, it is characterized in that: the device of described directing air flow (11) is arranged on the top of the spray gun (3) of reactor body (4).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016374A (en) * | 2014-04-29 | 2014-09-03 | 大唐科技产业集团有限公司 | Novel urea pyrolysis furnace for denitrifying flue gas |
| CN105011380A (en) * | 2015-08-11 | 2015-11-04 | 深圳市新宜康科技有限公司 | Blade partition type electronic cigarette smoke flue structure |
| CN110065955A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN110065954A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372929A (en) * | 2007-08-24 | 2009-02-25 | 丰田纺织株式会社 | swirl generator |
| CN201907975U (en) * | 2010-11-25 | 2011-07-27 | 北京洛卡环保技术有限公司 | Pyrolysis device for utilizing urea for ammonia preparation |
| CN102261659A (en) * | 2010-05-07 | 2011-11-30 | 通用电气公司 | Turbomachine injection nozzle assembly |
-
2013
- 2013-02-06 CN CN201310047260.XA patent/CN103159231B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372929A (en) * | 2007-08-24 | 2009-02-25 | 丰田纺织株式会社 | swirl generator |
| CN102261659A (en) * | 2010-05-07 | 2011-11-30 | 通用电气公司 | Turbomachine injection nozzle assembly |
| CN201907975U (en) * | 2010-11-25 | 2011-07-27 | 北京洛卡环保技术有限公司 | Pyrolysis device for utilizing urea for ammonia preparation |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016374A (en) * | 2014-04-29 | 2014-09-03 | 大唐科技产业集团有限公司 | Novel urea pyrolysis furnace for denitrifying flue gas |
| CN105011380A (en) * | 2015-08-11 | 2015-11-04 | 深圳市新宜康科技有限公司 | Blade partition type electronic cigarette smoke flue structure |
| CN110065955A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN110065954A (en) * | 2019-05-22 | 2019-07-30 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN110065954B (en) * | 2019-05-22 | 2023-12-01 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
| CN110065955B (en) * | 2019-05-22 | 2023-12-08 | 湖南省约伯能源科技有限公司 | Ammonia gas generating device |
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| CN103159231B (en) | 2015-03-04 |
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