CN219897619U - Pump control SNCR denitration gas-liquid distribution device - Google Patents
Pump control SNCR denitration gas-liquid distribution device Download PDFInfo
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- CN219897619U CN219897619U CN202320989943.6U CN202320989943U CN219897619U CN 219897619 U CN219897619 U CN 219897619U CN 202320989943 U CN202320989943 U CN 202320989943U CN 219897619 U CN219897619 U CN 219897619U
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- Prior art keywords
- pump
- valve
- compressed air
- reducing agent
- branch
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- 239000007788 liquid Substances 0.000 title claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a pump-control SNCR denitration gas-liquid distribution device, which comprises a reducing agent distribution system and a compressed air distribution system; the reducing agent distribution system comprises a reducing agent main pipeline and a plurality of reducing agent branch pipelines, wherein each reducing agent branch pipeline is sequentially provided with a first ball valve, a constant-pressure variable-frequency pump, a first check valve, a first flowmeter, a first pressure transmitter and a needle valve; the compressed air distribution system comprises a compressed air main pipeline and a plurality of compressed air branch pipelines, wherein the compressed air main pipeline is sequentially provided with a second ball valve, a first pressure reducing valve, a regulating valve and a second check valve, and the compressed air branch pipeline is sequentially provided with a second flowmeter, a second pressure transmitter and a second pressure reducing valve. The utility model utilizes the pump to control the flow of each reducing agent branch, the flow regulation of each reducing agent branch can not affect each other, the control logic is simpler, and the cost is saved.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration, in particular to a pump-control SNCR denitration gas-liquid distribution device.
Background
The cement plant adopts ammonia water or urea as a reducing agent, the injection flow and pressure of the reducing agent are regulated in real time by utilizing a distribution device, the flow of each branch reducing agent is regulated timely according to the requirement, and the distributed reducing agent and compressed air are injected into a flue through an atomization spray gun together to reduce the content of nitrogen oxides in the flue gas.
The conventional distribution device utilizes a pneumatic or electric regulating valve to distribute flow, and has the following technical problems:
on the one hand, the opening degree of the regulating valve of the branch circuit can influence the flow of the reducing agent of other branch circuits, namely, the problem of mutual interference among the branch circuits exists.
On the other hand, when the pneumatic regulating valve is adopted, the air source is required to be operated by a clean oil-free and water-free instrument air source to play a regulating function because the quality requirement on the air source is higher, and various filtering and drying devices are added at the front end of the pneumatic regulating valve to prevent water or other impurities in the air from entering the pneumatic regulating executing mechanism. From the field installation angle, the field instrument air source pipeline material and the pipeline installation cost can be increased, meanwhile, the pipeline is complex, the fault points are increased, and the later operation cost is increased. In addition, the pneumatic regulating valve is usually imported and has high price.
Disclosure of Invention
The utility model aims to: the utility model aims to provide a pump-control SNCR denitration gas-liquid distribution device which has low cost and does not affect each other in the flow regulation of each reducing agent branch
The technical scheme is as follows: the utility model provides a pump-control SNCR denitration gas-liquid distribution device which comprises a reducing agent distribution system and a compressed air distribution system, wherein the reducing agent distribution system comprises a reducing agent main pipeline and a plurality of reducing agent branch pipelines separated by the reducing agent main pipeline, each reducing agent branch pipeline is provided with a constant-pressure variable-frequency pump, a first flowmeter and a first pressure transmitter, and the constant-pressure variable-frequency pump is used for independently regulating the reducing agent flow of each reducing agent branch pipeline.
Furthermore, the reducer branch pipelines are connected through an intercommunication valve, so that all constant-pressure variable-frequency pumps are mutually backed up.
Further, the communicating valve adopts an electric ball valve.
Further, a needle valve is arranged at the inlet of the spray gun on the reducing agent branch pipeline and used for manually adjusting the reducing agent flow of the reducing agent branch pipeline and balancing the different reducing agent branch pipelines and the resistance of the spray gun.
Further, a safety valve is arranged on the constant-pressure variable-frequency pump, and when the pressure of a pump port is overlarge, the safety valve is automatically opened to ensure that the output pressure is constant.
Further, each reductant branch line corresponds to one or more lances.
Further, a first ball valve is arranged at the front end of the constant-pressure variable-frequency pump on the reducing agent branch pipeline, and a first check valve is arranged at the rear end of the constant-pressure variable-frequency pump.
Further, the compressed air distribution system comprises a compressed air main pipeline and a plurality of compressed air branch pipelines separated by the compressed air main pipeline, and the compressed air main pipeline is sequentially provided with a second ball valve, a first pressure reducing valve, a regulating valve and a second check valve.
Further, a second flowmeter, a second pressure transmitter and a second pressure reducing valve are arranged on the compressed air branch pipeline.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages: the flow of the reducing agent branch is controlled by a pump, the flow regulation of each reducing agent branch cannot affect each other, and the control logic is simpler; the cost is saved, a clean oil-free and water-free gas source for instruments is not considered, a large number of filtering and drying equipment is reduced, fault points are reduced, and an expensive inlet regulating valve is not needed; the distribution device is of a modularized structure, and is convenient to install.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the embodiments of the present utility model, and it is obvious that the drawings described below are only embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a pump-controlled SNCR denitration gas-liquid distribution device according to an embodiment of the present utility model;
reference numerals: 1, a main reducing agent pipeline; 2, a reducing agent branch pipeline; 201, a first ball valve; 202, a constant-pressure variable-frequency pump; 203, a first check valve; 204, a first flow meter; 205, a first pressure transmitter; 206, needle valve; 3, compressing an air main pipeline; 301, a second ball valve; 302, a first pressure reducing valve; 303, regulating a valve; 304, a second check valve; 4, compressed air branch pipelines; 401, a second flowmeter; 402, a second pressure transmitter; 403, a second pressure relief valve; 5, communicating the valve; 6, a spray gun.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is obvious that the described embodiments are not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model based on the embodiments of the present utility model.
As shown in fig. 1, a pump-controlled SNCR denitration gas-liquid distribution device according to an embodiment of the present utility model includes a reductant distribution system and a compressed air distribution system.
The reducing agent distribution system comprises a reducing agent main pipeline 1 and four reducing agent branch pipelines 2 separated by the reducing agent main pipeline 1, wherein the four reducing agent branch pipelines 2 are respectively connected with four spray guns 6. Each reducing agent branch pipeline 2 is sequentially provided with a first ball valve 201, a constant-pressure variable-frequency pump 202, a first check valve 203, a first flowmeter 204, a first pressure transmitter 205 and a needle valve 206, wherein the needle valve 206 is positioned at the inlet of the spray gun 6.
The flow rate of the reducing agent in each reducing agent branch pipeline 2 can be adjusted by changing the frequency of the corresponding constant-pressure variable-frequency pump 202, and the flow rate of other reducing agent branch pipelines 2 is not influenced. The flow of reductant in each reductant leg 2 may be manually adjusted using the needle valve 206 to balance the different reductant leg 2 and lance 6 resistances.
In this embodiment, each reductant branch line 2 corresponds to one spray gun 6, and it is understood that each reductant branch line 2 may also correspond to a plurality of spray guns 6, i.e. the end of each reductant branch line 2 is further divided into a plurality of branches and connected to a plurality of spray guns 6 respectively.
In addition, the reducing agent branch pipelines 2 are connected through the communicating valve 5, so that the constant-pressure variable-frequency pumps 202 are mutually backed up. When one constant pressure variable frequency pump 202 fails, the intercommunication valve 5 between the reducing agent branch pipelines 2 is opened, and the operation of the distribution device is not affected. In this embodiment, the communication valve 5 is an electrically operated ball valve.
The constant pressure variable frequency pump 202 output pressure is constant through a safety valve on the pump, and when the pump port pressure is too high, the safety valve is automatically opened.
The compressed air distribution system comprises a compressed air main pipeline 3 and four compressed air branch pipelines 4 separated by the compressed air main pipeline 3, wherein the four compressed air branch pipelines 4 are respectively connected with four spray guns 6.
The compressed air main pipeline 3 is provided with a second ball valve 301, a first pressure reducing valve 302, a regulating valve 303 and a second check valve 304 in sequence. The compressed air branch line 4 is provided with a second flowmeter 401, a second pressure transmitter 402 and a second pressure reducing valve 403 in this order. The second pressure reducing valve 403 on the compressed air branch 4 can adjust the pressure and flow of the compressed air branch 4 to match the reducing agent flow.
In this example, ammonia is used as the reducing agent.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions that may be easily conceived by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a pump accuse SNCR denitration gas-liquid distributor, includes reductant dispensing system and compressed air dispensing system, and the reductant dispensing system includes reductant main line (1) and a plurality of reductant branch pipelines (2) that divide by reductant main line (1), and its characterized in that all is equipped with constant voltage variable frequency pump (202), first flowmeter (204) and first pressure transmitter (205) on every reductant branch pipeline (2), and constant voltage variable frequency pump (202) are used for independently adjusting the reductant flow of each reductant branch pipeline (2).
2. The pump-control SNCR denitration gas-liquid distribution device as claimed in claim 1, wherein the reducer branch pipelines (2) are connected through an intercommunicating valve (5) so as to make each constant-pressure variable-frequency pump (202) mutually back up.
3. The pump-control SNCR denitration gas-liquid distribution device according to claim 2, wherein the intercommunicating valve (5) adopts an electric ball valve.
4. The pump-controlled SNCR denitration gas-liquid distribution apparatus according to claim 1, wherein a needle valve (206) is provided on the reducing agent branch pipe (2) at the inlet of the spray gun (6) to manually adjust the reducing agent flow rate of the reducing agent branch pipe (2) and balance the resistances of the reducing agent branch pipe (2) and the spray gun (6).
5. The pump-controlled SNCR denitration gas-liquid distribution apparatus according to claim 1, wherein a safety valve is provided on the constant-pressure variable-frequency pump (202), and the safety valve is automatically opened when the pump port pressure is too large to ensure the output pressure to be constant.
6. Pump-controlled SNCR denitration gas-liquid distribution device according to claim 1, characterized in that each reductant branch line (2) corresponds to one or more lances (6).
7. The pump-control SNCR denitration gas-liquid distribution device according to claim 1, wherein a first ball valve (201) is arranged at the front end of a constant-pressure variable-frequency pump (202) on a reducer branch pipeline (2), and a first check valve (203) is arranged at the rear end of the constant-pressure variable-frequency pump (202).
8. The pump-controlled SNCR denitration gas-liquid distribution apparatus according to any one of claims 1 to 7, wherein the compressed air distribution system includes a compressed air main pipe (3) and a plurality of compressed air branch pipes (4) branched from the compressed air main pipe (3), and a second ball valve (301), a first pressure reducing valve (302), a regulating valve (303) and a second check valve (304) are sequentially provided on the compressed air main pipe (3).
9. The pump-control SNCR denitration gas-liquid distribution device according to claim 8, wherein a second flowmeter (401), a second pressure transmitter (402) and a second pressure reducing valve (403) are arranged on the compressed air branch pipeline (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320989943.6U CN219897619U (en) | 2023-04-27 | 2023-04-27 | Pump control SNCR denitration gas-liquid distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320989943.6U CN219897619U (en) | 2023-04-27 | 2023-04-27 | Pump control SNCR denitration gas-liquid distribution device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219897619U true CN219897619U (en) | 2023-10-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320989943.6U Active CN219897619U (en) | 2023-04-27 | 2023-04-27 | Pump control SNCR denitration gas-liquid distribution device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219897619U (en) |
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2023
- 2023-04-27 CN CN202320989943.6U patent/CN219897619U/en active Active
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