CN215027547U - SNCR reaction unit for cement production - Google Patents
SNCR reaction unit for cement production Download PDFInfo
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- CN215027547U CN215027547U CN202120662622.6U CN202120662622U CN215027547U CN 215027547 U CN215027547 U CN 215027547U CN 202120662622 U CN202120662622 U CN 202120662622U CN 215027547 U CN215027547 U CN 215027547U
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- reaction
- mixing
- reducer
- reaction chamber
- sncr
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 42
- 239000004568 cement Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 239000007792 gaseous phase Substances 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- 230000008676 import Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 244000261422 Lysimachia clethroides Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a SNCR reaction unit for cement manufacture, include tuber pipe interface, reducer, mixed reaction chamber, choke and the connecting pipe of being connected with the pre-heater air outlet, the macrostoma and the branch pipe interface connection of reducer, the osculum of reducer and the bottom of mixing the reaction chamber are connected, the top of mixing the reaction chamber is connected with the one end of choke, and the other end and the connecting pipe of choke are connected, still be equipped with several evenly distributed's denitration reductant import on the lateral wall of reaction mixing chamber. The utility model discloses utilize the venturi principle, effectively improved the gas-liquid mixture degree, and then improved denitration reaction rate and reaction efficiency, the dust concentration is low in the air current simultaneously, and under strong negative pressure entrainment effect, the difficult deposit that produces of granule in the air current, the gaseous phase is comparatively balanced, and then alleviates the skinning phenomenon.
Description
Technical Field
The utility model belongs to the technical field of cement manufacture, concretely relates to SNCR reaction unit is used in cement manufacture.
Background
At present, cement plants are mostly provided with SNCR denitration systems for reducing the emission of nitrogen oxides. The reduction denitration agent used by the SNCR is ammonia water with the concentration of 20%, theoretically, the reaction temperature range is 850-1050 ℃, the reaction temperature range corresponds to the outlet from a kiln tail smoke chamber of a cement burning system to a C5 preheater, at present, most cement factories arrange SNCR ammonia water spray guns at the positions of a decomposing furnace, a gooseneck and the like, the decomposing furnace and the gooseneck are used as SNCR denitration reactors, the positions belong to areas with unburnt coal powder and have decomposition heat absorption interference of raw material powder, the SNCR denitration efficiency can be reduced, the further burning-out of the coal powder can be influenced by the injection heat absorption of the ammonia water, and the SNCR denitration agent is not beneficial to cement production and waste gas treatment.
Disclosure of Invention
The utility model aims to solve the technical problem that just not enough to above-mentioned prior art provides a SNCR reaction unit for cement manufacture, and it utilizes the venturi principle for gas-liquid mixture is more even, has alleviateed the stove crust, has improved the efficiency and the effect of denitration.
The utility model adopts the technical proposal that: the SNCR reaction device for cement production comprises an air pipe connector, a reducer, a mixed reaction chamber, a throat pipe and a connecting pipe, wherein the air pipe connector, the reducer, the mixed reaction chamber, the throat pipe and the connecting pipe are connected with an air outlet of a preheater, a large opening of the reducer is connected with a branch pipe connector, a small opening of the reducer is connected with the bottom of the mixed reaction chamber, the top of the mixed reaction chamber is connected with one end of the throat pipe, the other end of the throat pipe is connected with the connecting pipe, and a plurality of denitration reducing agent inlets which are uniformly distributed are further arranged on the side wall of the reacted mixing chamber.
Preferably, the air pipe connector is connected with an air outlet of a preheater of the smoke chamber connected with the discharge port.
Preferably, the denitration reducing agent inlet is an ammonia water spray gun.
Preferably, four denitration reducing agent inlets are arranged, and the four denitration reducing agent inlets are uniformly distributed in the middles of four sides of the mixing reaction chamber.
The beneficial effects of the utility model reside in that:
(1) the reducing pipe is adopted, the space of the gas entering the mixing reaction chamber is suddenly enlarged, the flow rate of the gas is reduced and the gas is dispersed to the periphery, and the negative pressure effect of the mixing reaction chamber can be enhanced, so that the gas and the sprayed liquid are quickly mixed and uniformly mixed, and the denitration efficiency and effect are improved;
(2) set up the choke, because the structure that the choke is middle thin, both ends are big for mist produces the effect of spouting when getting into the connecting pipe, further strengthens gas-liquid mixture degree, thereby further improves SNCR and takes off a round trip reaction efficiency.
(3) The device is arranged on a connecting pipeline between a C5 preheater and a C4 preheater, the dust concentration in the gas flow is low, the gas temperature is generally 850-880 ℃, and the device is suitable for SNCR denitration reaction.
The utility model discloses utilize the venturi principle, effectively improved the gas-liquid mixture degree, and then improved denitration reaction rate and reaction efficiency, the dust concentration is low in the air current simultaneously, and under strong negative pressure entrainment effect, the difficult deposit that produces of granule in the air current, the gaseous phase is comparatively balanced, and then alleviates the skinning phenomenon.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the present invention.
In the figure: 1. an air pipe connector; 2. a reducer; 3. a mixing reaction chamber; 4. a throat; 5. a connecting pipe; 6. denitration reductant import.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 and fig. 2, the SNCR reaction apparatus for cement production provided in this embodiment includes an air duct connector 1, a reducing pipe 2, a mixing reaction chamber 3, a throat 4 and a connecting pipe 5, wherein one end of the air duct connector 1 is connected to an air outlet of a preheater whose discharge port is communicated with a smoke chamber, that is, there are five-stage preheaters C1, C2, C3, C4 and C5 from top to bottom, the present invention is installed on an air duct connected to C5 and C4, that is, one end of the air duct connector 1 is connected to an air outlet of the C5 preheater, the other end of the air duct connector 1 is connected to the reducing pipe 2, the reducing pipe 2 is funnel-shaped with a large opening and a small opening, one end of the large opening of the reducing pipe 2 is matched and connected to the air duct connector 1, one end of the small opening of the reducing pipe 2 is connected to the bottom of the mixing reaction chamber 3, the side walls around the mixing reaction chamber 3 are respectively provided with a denitration reducing agent inlet 6, the denitration reducing agent inlet 6 is an ammonia water spray gun in this embodiment, the denitration reducing agent adopts ammonia water, and is sprayed into the mixed reaction chamber 3 through an ammonia water spray gun, the top of the mixed reaction chamber 3 is connected with the throat pipe 4, the throat pipe 4 is a conventional airflow conduit with two large ends and a small middle part, one end of the throat pipe 4 is communicated with the top of the mixed reaction chamber 3, the other end of the throat pipe is connected with the connecting pipe 5, and one end of the connecting pipe 5, which is far away from the throat pipe 4, is communicated with an air pipe connected with a C4 preheater.
The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a cement manufacture is with SNCR reaction unit which characterized in that: the denitration reducing agent mixing device comprises an air pipe connector (1) connected with an air outlet of a preheater, a reducer (2), a mixing reaction chamber (3), a throat (4) and a connecting pipe (5), wherein a large opening of the reducer (2) is connected with a branch pipe connector, a small opening of the reducer (2) is connected with the bottom of the mixing reaction chamber (3), the top of the mixing reaction chamber (3) is connected with one end of the throat (4), the other end of the throat (4) is connected with the connecting pipe (5), and a plurality of denitration reducing agent inlets (6) which are uniformly distributed are further formed in the side wall of the reaction mixing chamber.
2. The SNCR reaction apparatus for cement production according to claim 1, wherein: the air pipe connector (1) is connected with an air outlet of a preheater of the smoke chamber connected with the discharge hole.
3. An SNCR reaction apparatus for cement production according to claim 1 or 2, wherein: the denitration reducing agent inlet (6) is an ammonia water spray gun.
4. The SNCR reaction device for cement production according to claim 3, wherein: the denitration reducing agent inlet (6) is provided with four, and the four denitration reducing agent inlets (6) are uniformly distributed in the middle of four sides of the mixing reaction chamber (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662622.6U CN215027547U (en) | 2021-03-31 | 2021-03-31 | SNCR reaction unit for cement production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662622.6U CN215027547U (en) | 2021-03-31 | 2021-03-31 | SNCR reaction unit for cement production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215027547U true CN215027547U (en) | 2021-12-07 |
Family
ID=79151252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120662622.6U Active CN215027547U (en) | 2021-03-31 | 2021-03-31 | SNCR reaction unit for cement production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215027547U (en) |
-
2021
- 2021-03-31 CN CN202120662622.6U patent/CN215027547U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240823 Address after: 422000 Building 11, Ziwei Shangcheng Ziwei Garden, Building Materials Road, Shiqiao Street, Shuangqing District, Shaoyang City, Hunan Province 0113004 Patentee after: Hunan Rujun Building Materials Co.,Ltd. Country or region after: China Address before: No. 904, unit 2, building 1, federal wealth center, No. 18, Wuke East 4th Road, Wuhou District, Chengdu, Sichuan 610000 Patentee before: SICHUAN ZHONGKEJUN ENERGY SAVING AND ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |