CN202555173U - Cement kiln SNCR (Selective Non Catalytic Reduction) denitration device - Google Patents
Cement kiln SNCR (Selective Non Catalytic Reduction) denitration device Download PDFInfo
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- CN202555173U CN202555173U CN201220178365XU CN201220178365U CN202555173U CN 202555173 U CN202555173 U CN 202555173U CN 201220178365X U CN201220178365X U CN 201220178365XU CN 201220178365 U CN201220178365 U CN 201220178365U CN 202555173 U CN202555173 U CN 202555173U
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- kiln sncr
- denitrification apparatus
- dore furnace
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Abstract
The utility model discloses a cement kiln SNCR (Selective Non Catalytic Reduction) denitration device which comprises a preheater (1), a decomposing furnace (2), a nozzle (3) and an ammonia water storage tank (7), wherein the nozzle (3) is arranged on the side wall of the decomposing furnace (2); the nozzle (3) is connected with a flowmeter (4), an addition pump (5), a filter (6) and the ammonia water storage tank (7) in sequence through an ammonia water conveying pipeline; the decomposing furnace (2) is internally provided with a combustor (8); and the smoke discharge pipeline of the decomposing furnace (2) is provided with the preheater (1). The cement kiln SNCR denitration device disclosed by the utility model has the advantages of high denitration efficiency and simple equipment structure, and the comprehensive denitration efficiency can be over 70%.
Description
Technical field
The utility model relates to a kind of denitrification apparatus, and particularly a kind of cement kiln SNCR denitrification apparatus belongs to the gas denitrifying technology field.
Background technology
Along with development, the progress of society, the cement use amount of China is increasingly high, so cement output is just more and more; When cement output increased, the discharge capacity of NOx was also increasing, and NOx is mainly derived from cement kiln in the manufacture of cement; Traditional method of denitration is SCR (SCR) and non-selective catalytic reduction (SNCR); Because it is little that SCR (SNCR) denitration has the combustion apparatus of taking space, advantages such as transformation cycle weak point are extensively adopted; But present SCR (SNCR) method of denitration denitration efficiency is merely about 30%, and denitration efficiency is lower.
The utility model content
The purpose of the utility model is, a kind of cement kiln SNCR denitrification apparatus is provided, and it has the denitration efficiency height, the simple advantage of device structure.
The technical scheme of the utility model: a kind of cement kiln SNCR denitrification apparatus; Comprise preheater, dore furnace, nozzle and tank used for storing ammonia; Nozzle is located on the sidewall of dore furnace, and nozzle is connected with flowmeter, interpolation pump, filter, tank used for storing ammonia through the ammoniacal liquor transfer pipeline successively; Be provided with burner in the dore furnace; The smoke evacuation pipeline of dore furnace is provided with preheater.
In the aforesaid this cement kiln SNCR denitrification apparatus, said burner adopts low NO.
In the aforesaid this cement kiln SNCR denitrification apparatus, said nozzle is installed on the furnace wall in 750 ℃ of dore furnaces～950 ℃ of intervals.
In the aforesaid this cement kiln SNCR denitrification apparatus, the quantity of said nozzle is more than 1.
In the aforesaid this cement kiln SNCR denitrification apparatus, said nozzle adopts biliquid solid-cone or flat burner, and the outside of nozzle is provided with protection wind sleeve pipe.
Compared with prior art, the utility model is owing to adopted low NO, and adjustable pulverized coal bias combustion has bistable combustion measure, and promptly surely fire bias combustion and combustion stabilizing body two aspects, thereby effectively reduce the generation of NOx, prolongs the burning time of coke.
Owing to arrange atomizer at the dore furnace higher slice, spray into ammoniacal liquor or urea liquid, carry out NOx is reduced into the nitrogen G&W in 750 ℃～950 ℃ intervals, reach the purpose of denitration.
Because nozzle adopts biliquid solid-cone or flat burner, atomizing particle size is 50 μ m～350 μ m, and atomizing angle can reach 30 degree～120 degree.
In sum, the denitration efficiency of the utility model can reach more than 70%.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation that nozzle is provided with protection wind sleeve pipe outward.
Being labeled as in the accompanying drawing: the 1-preheater, the 2-dore furnace, the 3-nozzle, the 4-flowmeter, 5-adds pump, 6-filter, 7-tank used for storing ammonia, 8-burner, 9-protection wind sleeve pipe.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described, but not as the foundation to the utility model restriction.
The embodiment of the utility model: a kind of cement kiln SNCR denitrification apparatus; As shown in Figure 1; Comprise preheater 1, dore furnace 2, nozzle 3 and tank used for storing ammonia 7; Nozzle 3 is located on the sidewall of dore furnace 2, and nozzle 3 is connected with flowmeter 4, interpolation pump 5, filter 6, tank used for storing ammonia 7 through the ammoniacal liquor transfer pipeline successively; Be provided with burner 8 in the dore furnace 2; The smoke evacuation pipeline of dore furnace 2 is provided with preheater 1.Said burner 8 adopts low NO.The quantity of nozzle 3 is more than 1.Nozzle 3 is installed on the furnace wall in 750 ℃ of dore furnaces～950 ℃ of intervals.
As shown in Figure 2, nozzle 3 adopts biliquid solid-cone or flat burner, and the outside of nozzle 3 is provided with protection wind sleeve pipe 9.
The operation principle of the utility model is following: at first filter through filter 6 after ammoniacal liquor comes out from tank used for storing ammonia 7; Add pump 5 through ammoniacal liquor then and send into flowmeter 4; Ammonia spirit through metering gets into nozzle 3; In nozzle 3, mix, spray into dore furnace 2 after the ammonia atomization, react with NOx with compressed air.
In addition,, and keep reducing atmosphere, just can lower the NOx that in kiln internal combustion band, forms in the feed end fire fuel of kiln;
Through adjustment combustion air amount, make that roasting fuel is in reducing atmosphere, to burn at first, with the generation of reduction NOx, and then completing combustion in oxidizing atmosphere; Addition through the control raw material is regulated sintering temperature; Introduce tertiary air and adjust reducing atmosphere in the roasting device, make it reach suitable reducing atmosphere, adopt the SCC technology of this mode can reduce heating power type and fuel type NOx.
Claims (5)
1. cement kiln SNCR denitrification apparatus; It is characterized in that: comprise preheater (1), dore furnace (2), nozzle (3) and tank used for storing ammonia (7); Nozzle (3) is located on the sidewall of dore furnace (2), and nozzle (3) is connected with flowmeter (4), interpolation pump (5), filter (6), tank used for storing ammonia (7) through the ammoniacal liquor transfer pipeline successively; Be provided with burner (8) in the dore furnace (2); The smoke evacuation pipeline of dore furnace (2) is provided with preheater (1).
2. a kind of cement kiln SNCR denitrification apparatus according to claim 1 is characterized in that: said burner (8) adopts low NO.
3. a kind of cement kiln SNCR denitrification apparatus according to claim 1, it is characterized in that: said nozzle (3) is installed on the furnace wall in (2) 750 ℃～950 ℃ of intervals of dore furnace.
4. according to claim 1 or 2 or 3 described a kind of cement kiln SNCR denitrification apparatus, it is characterized in that: the quantity of said nozzle (3) is more than 1.
5. a kind of cement kiln SNCR denitrification apparatus according to claim 4 is characterized in that: said nozzle (3) adopts biliquid solid-cone or flat burner, and the outside of nozzle (3) is provided with protection wind sleeve pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220178365XU CN202555173U (en) | 2012-04-24 | 2012-04-24 | Cement kiln SNCR (Selective Non Catalytic Reduction) denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220178365XU CN202555173U (en) | 2012-04-24 | 2012-04-24 | Cement kiln SNCR (Selective Non Catalytic Reduction) denitration device |
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| CN202555173U true CN202555173U (en) | 2012-11-28 |
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| CN201220178365XU Expired - Lifetime CN202555173U (en) | 2012-04-24 | 2012-04-24 | Cement kiln SNCR (Selective Non Catalytic Reduction) denitration device |
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| CN (1) | CN202555173U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206865A (en) * | 2013-03-22 | 2013-07-17 | 上海三融环保工程有限公司 | Efficient reburning denitrification device and technical method |
| CN103418228A (en) * | 2013-09-05 | 2013-12-04 | 杨盛林 | Intelligent SNCR denitrifying system |
| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| WO2016113049A1 (en) * | 2015-01-14 | 2016-07-21 | Thyssenkrupp Industrial Solutions Ag | Method for reducing nitrogen oxides in the exhaust gas of an entrained-flow treatment plant, and entrained-flow treatment plant |
| WO2017012880A1 (en) * | 2015-07-23 | 2017-01-26 | Thyssenkrupp Industrial Solutions Ag | Process and plant for producing cement clinker or other mineral products and for removing nitrogen oxides from bypass gases |
| CN109289520A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of low energy consumption distribution out of stock system and the method that is pyrolyzed urea liquid |
| CN109569239A (en) * | 2018-12-06 | 2019-04-05 | 山东中旭节能环保科技有限公司 | A kind of method of new dry process rotary kiln denitrification |
| CN110170245A (en) * | 2019-06-15 | 2019-08-27 | 南京碧霞环保工程有限公司 | A kind of rotary kiln flue gas denitrification system and device |
-
2012
- 2012-04-24 CN CN201220178365XU patent/CN202555173U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206865A (en) * | 2013-03-22 | 2013-07-17 | 上海三融环保工程有限公司 | Efficient reburning denitrification device and technical method |
| CN103206865B (en) * | 2013-03-22 | 2015-09-30 | 上海三融环保工程有限公司 | Efficient denitration by refueling device and process |
| CN103418228A (en) * | 2013-09-05 | 2013-12-04 | 杨盛林 | Intelligent SNCR denitrifying system |
| CN103418228B (en) * | 2013-09-05 | 2015-10-14 | 杨盛林 | Intelligent sncr denitration system |
| WO2016113049A1 (en) * | 2015-01-14 | 2016-07-21 | Thyssenkrupp Industrial Solutions Ag | Method for reducing nitrogen oxides in the exhaust gas of an entrained-flow treatment plant, and entrained-flow treatment plant |
| CN104785093A (en) * | 2015-04-07 | 2015-07-22 | 中国华能集团清洁能源技术研究院有限公司 | Multi-nozzle type ammonia spraying grid device applicable to SNCR (selective non-catalytic reduction) |
| WO2017012880A1 (en) * | 2015-07-23 | 2017-01-26 | Thyssenkrupp Industrial Solutions Ag | Process and plant for producing cement clinker or other mineral products and for removing nitrogen oxides from bypass gases |
| CN109289520A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of low energy consumption distribution out of stock system and the method that is pyrolyzed urea liquid |
| CN109569239A (en) * | 2018-12-06 | 2019-04-05 | 山东中旭节能环保科技有限公司 | A kind of method of new dry process rotary kiln denitrification |
| CN110170245A (en) * | 2019-06-15 | 2019-08-27 | 南京碧霞环保工程有限公司 | A kind of rotary kiln flue gas denitrification system and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |