CN203220850U - Jet system suitable for SNCR (selective non-catalytic reduction) flue gas denitrification system of cement kiln - Google Patents
Jet system suitable for SNCR (selective non-catalytic reduction) flue gas denitrification system of cement kiln Download PDFInfo
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- CN203220850U CN203220850U CN 201320146504 CN201320146504U CN203220850U CN 203220850 U CN203220850 U CN 203220850U CN 201320146504 CN201320146504 CN 201320146504 CN 201320146504 U CN201320146504 U CN 201320146504U CN 203220850 U CN203220850 U CN 203220850U
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- compressed air
- cement kiln
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- reducing agent
- spray gun
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Abstract
The utility model discloses a jet system suitable for an SNCR (selective non-catalytic reduction) flue gas denitrification system of a cement kiln. The jet system is characterized in that each jet device comprises a compressed air delivery annular total pipe and a reducing agent delivery annular total pipe, wherein six compressed air distributors are uniformly mounted on the periphery of the compressed air delivery annular total pipe, six reducing agent calculating distributors are uniformly mounted on the periphery of the reducing agent delivery annular total pipe, the six compressed air distributors are respectively connected with six spray guns, the six reducing agent calculating distributors are respectively connected with the six spray guns, and each compressed air distributor and the reducing agent calculating distributor corresponding to each compressed air distributor are connected with the same spray gun. According to the jet system, the disadvantages that the jet quantity of reducing agents cannot be regulated in real time according to the working condition of the cement kiln and the jet mode is single are effectively solved, and an efficient and independent reducing agent jet system which is capable of being automatically matched with the operation condition of the cement kiln and is simple and convenient to operate, and a control method are provided for the flue gas denitrification system of the cement kiln.
Description
Technical field
The utility model relates to a kind of spraying system that is applicable to cement kiln SNCR flue gas denitrification system.
Background technology
Nitrogen oxide has entered the overall control index during " 12 ", well-known cement industry is one of main emission source of China's nitrogen oxide, national correlation department has been put into effect a series of policy and pollutant emission standards at the control of manufacture of cement discharged nitrous oxides in succession, under the promotion of national policy and standard, the implementation phase that cement industry having entered denitrating flue gas engineering large tracts of land.The cement kiln flue gas denitration technology of main flow is SNCR (SNCR) technology at present, and it is simple that this technology has flow process, small investment, and the construction period is short, and denitration effect is obvious, to characteristics such as the cement kiln systematic influence are little.Key technology in the cement kiln SNCR flue-gas denitration process is the injection of reducing agent, traditional cement kiln SNCR denitrating flue gas spraying system is generally individual layer, fixed gun design, do not consider corresponding combinations of injections strategy, cause that denitrating system efficient is low, operating cost is difficult to control.Cement kiln is in running, and operating mode has certain fluctuation, so also fluctuation thereupon of nitrous oxides concentration in the exhaust gas volumn in the flue gas predecomposition furnace and the flue gas.
The utility model content
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of spraying system that is applicable to cement kiln SNCR flue gas denitrification system to be provided.
The utility model is achieved through the following technical solutions:
A kind of spraying system that is applicable to cement kiln SNCR flue gas denitrification system, include two-layer injection apparatus up and down, described injection apparatus includes compressed air delivery ring main and reducing agent conveying annular house steward, six compressed air distributors are installed on the circumference of compressed air delivery ring main uniformly, six reductant metering distributors are installed on reducing agent conveying annular house steward's circumference uniformly, six compressed air distributors are connected with six spray guns respectively, six reductant metering distributors are connected with described six spray guns respectively, each compressed air distributor is connected with same spray gun with the reductant metering distributor corresponding with its position, described six spray guns include three long spray gun and three short spray guns that have protecting pipe of having protecting pipe, and described long spray gun and short spray gun are spaced apart.
The work of described six spray guns, six compressed air distributors and six reductant metering distributors all is subjected to the control of PLC control system.
Described spray gun is telescopic spray gun.
Operation principle of the present utility model is: COMS flue gas monitoring system arrives the PLC control system with real-time flue gas condition feedback, the injection program signal that the PLC control system will be finished in advance according to the flue gas situation sends to injection apparatus, the situation that puts into operation of control spray gun comprises that two-layer all spray guns put into operation, one deck spray gun puts into operation separately, two-layer long spray gun puts into operation, two-layer short spray gun puts into operation, the short spray gun of one deck puts into operation, the long spray gun of one deck puts into operation; Control single spray gun compressed air distributor simultaneously in real time, single spray gun reductant metering distributor, the emitted dose that guarantees every spray gun reducing agent remains on reasonable range, thereby guarantee that the reducing agent that sprays into conversion zone is evenly distributed, reaction condition is suitable, reaches the optimized operational mode of cement kiln SNCR flue gas denitrification system, reaches best denitration effect, reduce operating cost, prolong the life-span of spray gun.
The utility model has the advantages that: the utility model has two-layer spray gun, arrange 6 spray guns for every layer, spray gun is telescopic design, every spray gun can be controlled separately, integrated reducing agent, compressed air distribution and computation system, every layer of spray gun length rifle alternately arranged, change to control the combination that puts into operation of spray gun by the real-time flue gas of cement kiln system of flue gas monitoring system feedback, effectively solved in the traditional design and can not regulate reducing agent injection amount in real time according to the cement kiln operating mode, the drawback that jet mode is single is for the cement kiln denitrating system provides a kind of efficient, independent, automatically mate the cement kiln operating condition, reductant injection system easy and simple to handle and control.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is every layer of injection apparatus vertical view.
The specific embodiment
As Fig. 1, shown in 2, a kind of spraying system that is applicable to cement kiln SNCR flue gas denitrification system, include two-layer injection apparatus up and down, described injection apparatus includes compressed air delivery ring main 1 and reducing agent conveying annular house steward 2, six compressed air distributors 3 are installed on the circumference of compressed air delivery ring main 1 uniformly, six reductant metering distributors 4 are installed on reducing agent conveying annular house steward 2 circumference uniformly, six compressed air distributors 3 are connected with six spray guns 5 respectively, six reductant metering distributors 4 are connected with described six spray guns 5 respectively, each compressed air distributor 3 is connected with same spray gun 5 with the reductant metering distributor 4 corresponding with its position, described six spray guns 5 include three long spray gun 5-1 and three short spray gun 5-2 that have protecting pipe of having protecting pipe, and described long spray gun 5-1 and short spray gun 5-2 are spaced apart.
The work of described six spray guns 5, six compressed air distributors 3 and six reductant metering distributors 4 all is subjected to the control of PLC control system.
Described spray gun 5 is telescopic spray gun.
Claims (3)
1. spraying system that is applicable to cement kiln SNCR flue gas denitrification system, it is characterized in that: include two-layer injection apparatus up and down, described injection apparatus includes compressed air delivery ring main and reducing agent conveying annular house steward, six compressed air distributors are installed on the circumference of compressed air delivery ring main uniformly, six reductant metering distributors are installed on reducing agent conveying annular house steward's circumference uniformly, six compressed air distributors are connected with six spray guns respectively, six reductant metering distributors are connected with described six spray guns respectively, each compressed air distributor is connected with same spray gun with the reductant metering distributor corresponding with its position, described six spray guns include three long spray gun and three short spray guns that have protecting pipe of having protecting pipe, and described long spray gun and short spray gun are spaced apart.
2. the spraying system that is applicable to cement kiln SNCR flue gas denitrification system according to claim 1, it is characterized in that: the work of described six spray guns, six compressed air distributors and six reductant metering distributors all is subjected to the control of PLC control system.
3. the spraying system that is applicable to cement kiln SNCR flue gas denitrification system according to claim 1, it is characterized in that: described spray gun is telescopic spray gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320146504 CN203220850U (en) | 2013-03-27 | 2013-03-27 | Jet system suitable for SNCR (selective non-catalytic reduction) flue gas denitrification system of cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320146504 CN203220850U (en) | 2013-03-27 | 2013-03-27 | Jet system suitable for SNCR (selective non-catalytic reduction) flue gas denitrification system of cement kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203220850U true CN203220850U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320146504 Expired - Fee Related CN203220850U (en) | 2013-03-27 | 2013-03-27 | Jet system suitable for SNCR (selective non-catalytic reduction) flue gas denitrification system of cement kiln |
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| CN (1) | CN203220850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801170A (en) * | 2015-04-09 | 2015-07-29 | 常熟市华能环保工程有限公司 | Annular reducer spraying device of pellet flue gas denitrification system |
| CN106422732A (en) * | 2016-09-13 | 2017-02-22 | 中国华能集团公司 | Thermal power plant W type boiler SNCR denitration system and control method thereof |
-
2013
- 2013-03-27 CN CN 201320146504 patent/CN203220850U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801170A (en) * | 2015-04-09 | 2015-07-29 | 常熟市华能环保工程有限公司 | Annular reducer spraying device of pellet flue gas denitrification system |
| CN106422732A (en) * | 2016-09-13 | 2017-02-22 | 中国华能集团公司 | Thermal power plant W type boiler SNCR denitration system and control method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20180327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |