CN119425375A - SCR denitration system - Google Patents
SCR denitration system Download PDFInfo
- Publication number
- CN119425375A CN119425375A CN202411702791.2A CN202411702791A CN119425375A CN 119425375 A CN119425375 A CN 119425375A CN 202411702791 A CN202411702791 A CN 202411702791A CN 119425375 A CN119425375 A CN 119425375A
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- Prior art keywords
- ammonia
- chamber
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- scr denitration
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 348
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 174
- 239000003546 flue gas Substances 0.000 claims abstract description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 61
- 239000007924 injection Substances 0.000 claims abstract description 61
- 238000005507 spraying Methods 0.000 claims abstract description 48
- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 239000000779 smoke Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 39
- 230000003197 catalytic effect Effects 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims 2
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 31
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses an SCR denitration system which comprises an SCR denitration tower, wherein a flue guide plate, a flue gas premixer, a main ammonia spraying grid, an ammonia-smoke spoiler, a main catalyst layer, a supplementary ammonia spraying grid and a supplementary catalyst layer are sequentially arranged in the SCR denitration tower along the smoke flowing direction, the main ammonia spraying grid comprises a plurality of first ammonia spraying branch pipes which are arranged in parallel at equal intervals and perpendicular to the smoke flowing direction, a row of first nozzles and a row of second nozzles are obliquely arranged on each first ammonia spraying branch pipe along the length direction, a plurality of nozzles are arranged in each row, the first nozzles and the second nozzles are staggered and face different directions, each ammonia spraying branch pipe is communicated with an ammonia supply pipe, and an ammonia control valve is arranged on each first ammonia spraying branch pipe. According to the invention, through the matched use of the main ammonia injection grid and the supplementary ammonia injection grid, ammonia escape is reduced, uniform injection of ammonia in the whole reaction space is realized, and the ammonia escape is ensured to be maintained at a reasonable level.
Description
Technical Field
The invention belongs to the technical field of flue gas denitration, and particularly relates to an SCR denitration system.
Background
In order to reduce the NOx emission of coal-fired power generation, a flue gas denitration technology is a method which is commonly adopted at present, wherein the Selective Catalytic Reduction (SCR) denitration technology is that under the action of a catalyst, a reducing agent (ammonia) reacts with nitrogen oxides in flue gas to generate harmless nitrogen and water, so that the NOx in the flue gas is removed. The high-efficient stable operation of SCR denitrification facility receives the commonality and pays attention to, in the present SCR denitrification facility, ammonia injection grid has been arranged to the level in the flue in certain high position, and ammonia injection grid's nozzle is arranged in ammonia injection grid's leeward, spout ammonia in the flue gas along flue gas flow direction, the mixed gas just catalyzes the storehouse with the flue gas and reacts, realize the denitration, but the in-process of reducing NOx in the flue gas to N 2 is unavoidable to have certain ammonia escape, when ammonia escape level is too big, the ammonia of escape will form serious ammonium bisulfate to block up with SO 3 in the flue gas in air preheater cold junction, easily cause air preheater to block up, and cause adverse effect to dust collecting equipment, the low pressure economizer etc. of low side, consequently, need develop can improve the device of ammonia injection's accuracy and reduce ammonia escape.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an SCR denitration system so as to solve the technical problems of high ammonia escape amount and easy blockage of the SCR denitration system in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
An SCR denitration system comprises an SCR denitration tower, wherein a flue guide plate, a flue gas premixer, a main ammonia injection grid, an ammonia-flue spoiler, a main catalyst layer, a supplementary ammonia injection grid and a supplementary catalyst layer are sequentially arranged in the SCR denitration tower along the flue gas flowing direction;
The main ammonia spraying grid comprises a plurality of first ammonia spraying branch pipes which are arranged in parallel at equal intervals and perpendicular to the fume flowing direction, a row of first nozzles and a row of second nozzles are obliquely arranged on each first ammonia spraying branch pipe along the length direction, a plurality of nozzles are arranged in each row, and the first nozzles and the second nozzles are staggered and face different directions;
each ammonia spraying branch pipe is communicated with an ammonia supply pipe, and each first ammonia spraying branch pipe is provided with an ammonia control valve.
The invention also has the following technical characteristics:
Specifically, the head ends of the first nozzle and the second nozzle are respectively provided with an anti-blocking spray head.
Furthermore, the two ends of the ammonia supply pipe are respectively provided with an air inlet and a mixed gas outlet, the pipe wall of the ammonia supply pipe is also provided with at least one mounting hole, an ammonia air supply pipe is arranged in the mounting hole in a penetrating way, the air inlet is communicated with the air pipe, and the mixed gas outlet is connected with the ammonia air supply pipe.
Furthermore, a plurality of ammonia air supply openings are formed in the ammonia air supply pipe.
Still further, the supplementary ammonia spraying grid includes the second ammonia spraying branch pipe that many parallels were laid, all is provided with a plurality of third nozzles on every second ammonia spraying branch pipe, the third nozzle is laid against the flue gas flow direction.
Furthermore, the ammonia-smoke spoiler comprises a base plate, wherein a plurality of blade mounting holes are formed in the base plate and are distributed at equal intervals along the longitudinal direction and the transverse direction, and spoiler blades are movably arranged in the blade mounting holes.
Further, a flue gas inlet is formed in the top of the SCR denitration tower, and a clean gas outlet is formed in the bottom of the SCR denitration tower;
the reaction bin between the flue gas inlet and the flue guide plate is a guide bin, the reaction bin between the flue guide plate and the flue gas premixer is a premixing bin, the reaction bin between the flue gas premixer and the main ammonia injection grid is a main ammonia injection bin, the reaction bin between the main ammonia injection grid and the ammonia-smoke spoiler is a turbulent bin, the reaction bin between the ammonia-smoke spoiler and the main catalyst layer is a main catalytic bin, the reaction bin between the main catalyst layer and the supplementary ammonia injection grid is a supplementary ammonia injection bin, the reaction bin between the supplementary ammonia injection grid and the supplementary catalyst layer is a supplementary catalytic bin, the reaction bin between the supplementary catalyst layer and the purified gas outlet is an air outlet bin, and the flue gas inlet is sequentially communicated with the guide bin, the premixing bin, the main ammonia injection bin, the turbulent bin, the main catalytic bin, the supplementary ammonia injection bin, the supplementary catalytic bin, the air outlet and the purified gas outlet.
Furthermore, the flue gas inlet is communicated with an air inlet pipeline, the purified gas outlet is communicated with an air outlet pipeline, and NOx concentration detectors are arranged in the air inlet pipeline, the supplementary ammonia spraying bin and the air outlet pipeline.
Furthermore, an ammonia detector is also arranged in the air outlet pipeline.
Compared with the prior art, the invention has the following technical effects:
(1) According to the SCR denitration system, ammonia escape is reduced through the cooperation of the main ammonia spraying grid and the supplementary ammonia spraying grid, uniform injection of ammonia in the whole reaction space is achieved, and ammonia escape is kept at a reasonable level, wherein the main ammonia spraying grid consists of a plurality of first ammonia spraying branch pipes, the flow rate of the ammonia in each first ammonia spraying branch pipe can be independently regulated, the adjustability of the concentration of the ammonia on the same cross section in the SCR denitration tower is achieved, and through the cooperation of the main catalyst layer and the supplementary catalyst layer, the conversion rate of NOx in flue gas is improved, the thickness of the supplementary catalyst layer is small, and the structure is simple.
(2) The pure ammonia and the diluted air in the SCR denitration system are uniformly mixed in the ammonia supply pipe, so that the uniform concentration distribution of ammonia in the ammonia spraying branch pipe is ensured, and the anti-wear and anti-blocking spray head is arranged on the ammonia nozzle, so that the nozzle is effectively protected, and the flow equalization and anti-blocking effects are realized.
(3) The flue flow guide plate and the flue gas premixer are uniformly distributed with the upstream flue gas, so that the flue gas flow field can be improved, the influence of the working condition change on the NOx distribution of the section of the denitration inlet flue is reduced, and the full-load adaptability of the ammonia spraying system is improved.
Drawings
FIG. 1 is a schematic overall structure of the device of the present invention, wherein arrows indicate the flow direction of flue gas;
FIG. 2 is a schematic perspective view of a main ammonia injection grid;
FIG. 3 is a schematic view of a partial structure of a main ammonia injection grid;
FIG. 4 is a schematic diagram of an ammonia supply pipe;
FIG. 5 is a rear view of the first ammonia injection branch pipe;
Fig. 6 is a schematic diagram of an ammonia-smoke spoiler.
The meaning of each reference numeral and symbol in the drawings is:
The device comprises a 1-SCR denitration tower, a 2-reaction bin, a 3-flue guide plate, a 4-flue gas premixer, a 5-main ammonia injection grid, a 6-ammonia-flue spoiler, a 7-main catalyst layer, an 8-supplementary ammonia injection grid, a 9-supplementary catalyst layer, a 10-ammonia control valve, a 11-air inlet pipeline, a 12-air outlet pipeline, a 13-NOx concentration detector and a 14-ammonia detector;
101-a flue gas inlet and 102-a clean gas outlet;
201-a diversion bin, 202-a premixing bin, 203-an ammonia spraying bin, 204-a turbulence bin, 205-a main catalytic bin, 206-a supplementary ammonia spraying bin, 207-a supplementary catalytic bin and 208-an air outlet bin;
501-a first ammonia spraying branch pipe, 502-a first nozzle, 503-a second nozzle, 504-an ammonia supply pipe, 505-an ammonia air supply pipe and 506-an anti-blocking spray head;
601-a baseplate, 602-a blade mounting hole, 603-a turbulence blade;
801-a second ammonia injection branch pipe, 802-a third nozzle;
5041-an air inlet, 5042-a mixed gas outlet and 5043-a mounting hole;
5051-ammonia supply port.
The following examples illustrate the invention in further detail.
Detailed Description
All parts and instruments of the present invention are known in the art, and for example, the flue baffle is a conventional gas baffle known in the art, such as a gas baffle composed of a plurality of baffles, unless specifically described otherwise.
The flue gas premixer employs a conventional gas premixer, also known as a flue gas mixer, as known in the art.
The NO X concentration detection detector employs a conventional nitrogen oxide detector known in the art, and the ammonia detector also employs a conventional ammonia detector in the art. The ammonia control valve is a conventional gas control valve.
The terms "upper," "lower," "front," "rear," "top," "bottom," and the like are used herein to refer to an orientation or positional relationship for ease of description and simplicity of description only, and are not intended to indicate or imply that the devices or elements being referred to must be oriented, configured and operated in a particular orientation, with "inner," "outer" referring to the inner and outer sides of the corresponding component profiles, and the above terms are not to be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
Unless otherwise indicated, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or both in internal communication or in an interactive relationship. It will be understood by those skilled in the art that the specific meaning of the terms in the present invention may be understood according to the specific circumstances
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Examples:
According to the above technical scheme, as shown in fig. 1, the embodiment provides an SCR denitration system, which comprises an SCR denitration tower 1, wherein a flue guide plate 3, a flue gas premixer 4, a main ammonia injection grid 5, an ammonia-flue spoiler 6, a main catalyst layer 7, a supplementary ammonia injection grid 8 and a supplementary catalyst layer 9 are sequentially arranged in the SCR denitration tower 1 along the flue gas flowing direction;
As shown in fig. 2, 3 and 5, the main ammonia spraying grid 5 comprises a plurality of first ammonia spraying branch pipes 501 which are arranged in parallel at equal intervals and perpendicular to the fume flowing direction, a row of first nozzles 502 and a row of second nozzles 503 are respectively arranged on the pipe wall of the upper half pipe of each first ammonia spraying branch pipe 501 in an inclined manner along the length direction, the first nozzles 502 and the second nozzles 503 are arranged in a staggered manner and face different directions, and the number of the first nozzles 502 and the second nozzles 503 is a plurality. In this embodiment, the first nozzle 502 is obliquely disposed towards the upper left, the second nozzle 503 is obliquely disposed towards the upper right, the included angle formed by the projections of the first nozzle 502 and the second nozzle 503 on the same vertical plane is 30-150 °, and spoilers are respectively sleeved on the first nozzle 502 and the second nozzle 503.
Each first ammonia spraying branch pipe 501 is communicated with an ammonia supply pipe 504, the ammonia supply pipe 504 is used for introducing mixed gas of ammonia and air into the ammonia supply pipe, and each first ammonia spraying branch pipe 501 is provided with an ammonia control valve 10.
In other schemes, the main ammonia injection grid 5 can be divided into a plurality of ammonia injection grid units, the flow of ammonia in each ammonia injection grid unit is regulated through an independently arranged ammonia control valve 10, and then the ammonia injection amount of each ammonia injection grid unit is regulated, so that the ammonia concentration at a certain cross section of the main ammonia injection grid 5 is regulated.
As a preferable scheme of the present embodiment, the head ends of the first nozzle 502 and the second nozzle 503 are provided with anti-blocking spray heads 506.
In the embodiment, a flue gas inlet 101 is formed in the top of the SCR denitration tower 1, a clean gas outlet 102 is formed in the bottom of the SCR denitration tower, a reaction bin 2 is formed in the inner space of the SCR denitration tower 1, flue gas moves along the flue gas flowing direction after entering the SCR denitration tower 1 from the flue gas inlet 101, and purified flue gas is discharged from the clean gas outlet 102. The flue guide plate 3 and the flue gas premixer 4 are mainly used for uniformly distributing upstream flue gas, improving a flue gas flow field, and the flue gas flow velocity distribution deviation is not more than 15%. Preferably, the SCR denitration tower 1 is also connected with a cold air bypass, and the temperature of the flue gas entering the SCR denitration tower 1 is adjusted by heat exchange between the input cold air and the high-temperature flue gas, so that the operation temperature in the SCR denitration tower 1 is kept at 320-420 ℃. The reaction of NOx in the flue gas with ammonia gas is performed in the main catalyst layer 7 and the supplementary catalyst layer 9, and the main catalyst layer 7 and the supplementary catalyst layer 9 are each filled with a known conventional catalyst for conventional denitration, for example, a catalyst having titania as a main component. The main catalyst layer 7 adopts a mounting mode of '2+1', namely a primary mounting middle layer and a primary mounting lower layer, and an upper layer is reserved, and the upper layer can be additionally arranged according to the original flue gas initial NOx concentration and the denitration efficiency. The supplementary catalyst layer 9 is installed as a single layer, and the supplementary catalyst layer 9 is used for further denitration reaction so as to improve denitration efficiency.
Through the cooperation of main catalyst layer and supplementary catalyst layer, improved the conversion rate of NOx in the flue gas, and supplementary catalyst layer suitable attenuate, simple structure.
As shown in fig. 4, the two ends of the ammonia supply pipe 504 are respectively provided with an air inlet 5041 and a mixed gas outlet 5042, the pipe wall of the ammonia supply pipe 504 is also provided with at least one mounting hole 5043, the mounting hole 5043 is internally provided with an ammonia supply pipe 505 in a penetrating way, the air inlet 5041 is communicated with an air pipeline, and the mixed gas outlet 5042 is communicated with the first ammonia spraying branch pipe 501. The ammonia supply pipe 504 extends to the outside of the SCR denitration tower 1 and is communicated with an ammonia storage tank.
As a preferable scheme of this embodiment, a plurality of ammonia supply ports 5051 are provided on the ammonia supply pipe 505. The ammonia gas in the ammonia gas supply pipe 505 enters the ammonia supply pipe 504 through the ammonia gas supply opening 5051, and is mixed with the air entering through the air inlet 5041 to obtain a mixed gas, and the mixed gas enters the first ammonia spraying branch pipe 501 through the mixed gas outlet 5042.
As a preferred solution of this embodiment, the supplemental ammonia injection grid 8 includes a plurality of second ammonia injection branch pipes 801 arranged in parallel, and each second ammonia injection branch pipe 801 is provided with a plurality of third nozzles 802, where the third nozzles 802 are arranged opposite to the flue gas flow direction.
As shown in fig. 6, as a preferred solution of the present embodiment, the ammonia-smoke spoiler 6 includes a base plate 601, a plurality of blade mounting holes 602 are formed in the base plate 601, the plurality of blade mounting holes 602 are arranged at equal intervals along the longitudinal direction and the transverse direction, and spoiler blades 603 are movably mounted in the blade mounting holes 602. The spoiler blade 603 is rotatable 360 degrees in the blade mounting hole 602 and is swingable with the middle portion as both sides in the axial direction.
As shown in fig. 1, a flue gas inlet 101 is formed in the top of an SCR denitration tower 1, a clean gas outlet 102 is formed in the bottom of the SCR denitration tower 1, a reaction chamber 2 between the flue gas inlet and a flue guide plate 3 is a guide chamber 201, a reaction chamber 2 between the flue guide plate 3 and a flue gas premixer 4 is a premixing chamber 202, a reaction chamber 2 between the flue gas premixer 4 and a main ammonia injection grid 5 is a main ammonia injection chamber 203, a reaction chamber 2 between the main ammonia injection grid 5 and an ammonia-smoke spoiler 6 is a turbulence chamber 204, a reaction chamber 2 between the ammonia-smoke spoiler 6 and a main catalyst layer 7 is a main catalyst chamber 205, a reaction chamber 2 between the main catalyst layer 7 and a supplementary ammonia injection grid 8 is a supplementary ammonia injection chamber 206, a reaction chamber 2 between the supplementary ammonia injection grid 8 and the supplementary catalyst layer 7 is a supplementary catalyst chamber 207, a reaction chamber 2 between the supplementary catalyst layer 7 and the clean gas outlet is an air outlet 208, and the flue gas inlet 101 is a turbulence chamber 204, the main ammonia injection chamber 205, the main ammonia injection chamber 203, the supplementary catalyst chamber 203, the clean gas outlet 102, the clean gas outlet 206 are sequentially communicated with the main ammonia injection chamber 202, the main ammonia injection chamber 203, the main ammonia injection chamber 204, the clean gas outlet 206, and the clean gas outlet.
As a preferred scheme of the embodiment, the flue gas inlet 201 is communicated with the air inlet pipeline 11, the purified gas outlet 102 is communicated with the air outlet pipeline 12, the air inlet pipeline 11, the supplementary ammonia spraying bin 206 and the air outlet pipeline 12 are all provided with the NOx concentration detector 13, the NO X detector 13 can detect the NOx concentration of a plurality of measuring points, the detection result is fed back to a connected control system, and the control system controls the opening of the ammonia control valve 10 through preloaded software so as to adjust the ammonia spraying amount, thereby realizing the accurate ammonia spraying of NO X in the flue gas.
As a specific scheme of this embodiment, as shown in fig. 1, an ammonia gas detector 14 is further disposed on the gas outlet pipe 12.
The working process of the invention mainly comprises the following steps:
Step 1, flue gas enters an SCR denitration tower 1 through a flue gas inlet 101, and enters an ammonia spraying bin 203 and a turbulent flow bin 204 after passing through a diversion bin 201, a flue diversion plate 3, a premixing bin 202 and a flue gas premixer 4 in sequence;
step 2, opening an ammonia control valve, enabling the ammonia mixed with air to enter an ammonia supply pipe, flowing into a first ammonia spraying branch pipe 501, and spraying into an ammonia spraying bin 203 and a turbulent flow bin 204 through a first nozzle 502 and a second nozzle 503;
Step 3, mixing the flue gas and the ammonia gas in an ammonia spraying bin 203 and a turbulent flow bin 204, entering a main catalytic bin 205, and then reacting under the action of a catalyst to realize primary denitration;
Step 4, after the flue gas subjected to primary denitration enters the supplementary ammonia spraying bin 206, the ammonia mixed with air enters the second ammonia spraying branch pipe 801 and is sprayed out through the third nozzle 802;
And 5, the flue gas after the secondary denitration enters an air outlet bin 208 and is finally discharged from the purified gas outlet 102.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411702791.2A CN119425375A (en) | 2024-11-26 | 2024-11-26 | SCR denitration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411702791.2A CN119425375A (en) | 2024-11-26 | 2024-11-26 | SCR denitration system |
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| CN119425375A true CN119425375A (en) | 2025-02-14 |
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| CN202411702791.2A Pending CN119425375A (en) | 2024-11-26 | 2024-11-26 | SCR denitration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119909536A (en) * | 2025-03-24 | 2025-05-02 | 浙江浙能科技环保集团股份有限公司 | A gas turbine denitrification ammonia injection mixing device and its operation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119909536A (en) * | 2025-03-24 | 2025-05-02 | 浙江浙能科技环保集团股份有限公司 | A gas turbine denitrification ammonia injection mixing device and its operation method |
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