CN208287788U - Cement decomposing furnace, which directly sprays ammonia, reduces NOx device - Google Patents
Cement decomposing furnace, which directly sprays ammonia, reduces NOx device Download PDFInfo
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- CN208287788U CN208287788U CN201721727865.3U CN201721727865U CN208287788U CN 208287788 U CN208287788 U CN 208287788U CN 201721727865 U CN201721727865 U CN 201721727865U CN 208287788 U CN208287788 U CN 208287788U
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- ammonia
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- ammonia water
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Abstract
The utility model relates to cement decomposing furnace low NOx combusting technology fields, specifically providing a kind of cement decomposing furnace and directly spraying ammonia reduces NOx device, described device includes ammonia water spray device and dore furnace combustion apparatus, it is characterised in that: the ammonia water spray device includes ammonium hydroxide preparation tank (1), flow control valve (2), flowmeter (3), defeated ammonia pump (4), ammonia spraying amount automatic control device (5) and connecting pipe；The dore furnace combustion apparatus includes decomposing furnace body (6), tertiary-air pipe (7), gas inlet (8), ammonia water spray gun (9).The utility model has the advantages that field fabrication ammonium hydroxide, easy construction and without geographical restrictions, utilization is at low cost.Ammonium hydroxide, which is injected directly into hypoxemia flame, makes it that reduction reaction occur with NOx in flue gas, final to realize NOx low emission.
Description
Technical field
The utility model relates to cement decomposing furnace low NOx combusting technology fields, and it is direct specifically to provide a kind of cement decomposing furnace
Spraying ammonia reduces NOx device.
Background technique
Environmental pollution is on the rise, the continuous improvement that Environmental protection requires.Industrial Boiler NOx emission is main big
One of the major source of gas pollution." the cement industry atmosphere pollutants emission standards " that China in 2013 promulgates provide newly-built enterprise
Since on March 1st, 2014, existing enterprise the nitrogen oxide pollutant discharge of 400mg/m3 is executed since on July 1st, 2015
Limit value, just to existing dore furnace low-NO_x combustion technology, more stringent requirements are proposed for this.
It is widely used at present, the mature low NOx technology of cement decomposing furnace, such as furnace air classification, fuel staging, the combustion of low nitrogen
Burn etc., these technologies must tie tail denitrating flue gas (such as selective catalytic reduction (SCR) and selective non-catalytic reduction
(SNCR) etc.) just it is able to satisfy national standard (GB4915-2013).SCR and SNCR technology is by spraying into ammonia reduction into flue gas
Agent restores NOx, SNCR technology there are reaction temperature windows it is relatively narrow, the escaping of ammonia is serious the problems such as, that there are catalyst lifes is short by SCR,
The unfavorable factors such as flue blockage and installation and operation are at high cost, in application also by larger limitation.Therefore, there is an urgent need to research and develop
Low operating cost, denitration efficiency be high, low NOx technology of strong applicability meets market needs.
Utility model content
For the problems in background technique, the purpose of this utility model is to provide a kind of cement decomposing furnaces directly to spray ammonia drop
Low NOx device, to solve dore furnace face when completing low NOx drainage index (GB4915-2013) in current cement producing line
Limited etc. the problem in the denitration operating cost height that faces, temperature window narrow (SNCR), equipment place.
To achieve the goals above, the technical solution of the utility model is as follows:
A kind of cement decomposing furnace, which directly sprays ammonia, reduces NOx device, and described device includes ammonia water spray device and dore furnace combustion
Burn equipment, it is characterised in that: the ammonia water spray device includes being sequentially connected the ammonium hydroxide preparation tank (1) connect, flow control valve
(2), flowmeter (3), defeated ammonia pump (4), ammonia spraying amount automatic control device (5) and connecting pipe；The dore furnace combustion apparatus packet
It includes and decomposes furnace body (6), tertiary-air pipe (7), gas inlet (8), ammonia water spray gun (9)；Ammonia water spray gun (9) setting is being decomposed
The upper end of furnace body (6), gas inlet (8) setting is in the bottom for decomposing furnace body (6), and the tertiary-air pipe (7) is closely
Gas inlet (8) setting.
Further, bottom gas inlet (8) wind speed is about 30m/s, and high-speed flow is conducive to optimization burner hearth entirety flow field, keeps away
Exempt from localized hyperthermia, while being also beneficial to reduce NOx emission concentration.
Further, ammonia water spray gun (9) eject position is above fuel-rich regions, which is between 850-900 DEG C,
It arranges that 4 ammonia water spray guns are located at furnace body wall surface equidistant in same absolute altitude, is symmetric.
Further, the ammonia water spray gun on low-NOx combustor (9) uses mechanical atomization, and is not necessarily to air distribution, passes through defeated ammonia pump
(4) the pressure high speed provided injects the NH in ascending air, decomposited in furnace3Ingredient is mixed with the NOx generated in flue gas is risen
Reduction reaction occurs, to substantially reduce the concentration of emission of coal dust firing NOx.
The beneficial effect of the utility model compared with the existing technology is:
Ammonium hydroxide is made, easy construction and without geographical restrictions, utilization is at low cost.Ammonium hydroxide is injected directly into hypoxemia flame
Make it that reduction reaction occur with NOx in flue gas, it is final to realize NOx low emission.
Detailed description of the invention
Fig. 1 is that cement decomposing furnace directly sprays ammonia reduction NOx schematic device.
Wherein, 1- ammonium hydroxide preparation tank；2- flow control valve；3- flowmeter；The defeated ammonia of 4-；5- ammonia spraying amount automatic control system；
6- decomposes furnace body；7- tertiary-air pipe；8- gas inlet；9- ammonia water spray gun.
Fig. 2 is the arrangement schematic diagram of ammonia water spray gun.
Specific embodiment
With reference to the accompanying drawings and detailed description, detailed elaboration is made to the specific embodiment of the utility model.This
A little specific embodiments are only not used to limit the scope of the utility model or implementation principle, the guarantor of the utility model for narration
Shield range is still subject to claim, including obvious changes or variations etc. made on this basis.
The technical principle of the utility model is: by bottom gas inlet air quantity and tertiary air air flow rate proportioning, firing winner
Burning area be fuel-rich combustion area, on this basis, by ammonium hydroxide preparation tank ammonia and water be mixed with ammonia content for 20% it is molten
Liquid inputs ammonia water spray gun by defeated ammonia pump, sprays into position between fuel-rich regions and burning-out zone.Coal dust is not filled in reducing zone
Divided combustion, low-oxygen environment are conducive to inhibit the generation of NOx, meanwhile, ammonium hydroxide sprays into the fuel-rich region of high temperature, hypoxemia, what fast decoupled went out
NH3Ingredient mixes generation reduction reaction with the NOx generated in flue gas is risen, so that the discharge for substantially reducing coal dust firing NOx is dense
Degree.Its reaction is as follows:
O+H2O→OH+OH
Even if increasing for flue gas OH amount of ions is enhanced with NO reduction effect, react as follows:
As shown in Figure 1, it includes that ammonia water spray device and dore furnace burning are set that cement decomposing furnace, which directly sprays ammonia to reduce NOx device,
It is standby.Wherein, ammonia water spray device includes that ammonium hydroxide preparation tank 1, flow control valve 2, flowmeter 3, defeated ammonia pump 4, ammonia spraying amount are controlled automatically
Device 5 processed and connecting pipe；Dore furnace combustion apparatus includes decomposing furnace body 6, tertiary-air pipe 7, gas inlet 8, ammonia water spray gun
9。
8 air quantity of gas inlet is directly inputted by rotary kiln, actual wind speed 30m/s, and it is whole that high-speed flow is conducive to optimization burner hearth
Body flow field avoids localized hyperthermia, while advantageously reducing NOx concentration.Ammonia water spray regional temperature be 850-900 DEG C between,
Same absolute altitude arranges that 4 spray guns are located at furnace body wall surface equidistant, is symmetric, spray gun layout drawing is as shown in Figure 2.Ammonium hydroxide
Spray gun 9 uses mechanical atomization, and is not necessarily to air distribution, and the pressure high speed provided by defeated ammonia pump 4 is injected in furnace in ascending air, decomposes
NH out3It is mixed with the NOx generated in flue gas and reduction reaction occurs, to reduce the concentration of emission of coal dust firing NOx.
By bottom gas inlet air quantity and tertiary air air flow rate proportioning, so that main burning area is fuel-rich combustion area, herein
On the basis of, the ammonia spirit of debita spissitudo will be produced in preparation tank, ammonia water spray gun is inputted by defeated ammonia pump, spray into position fuel-rich
Between material and burning-out zone.
Claims (3)
1. cement decomposing furnace, which directly sprays ammonia, reduces NOx device, described device includes ammonia water spray device and dore furnace combustion apparatus,
It is characterized by: the ammonia water spray device includes being sequentially connected the ammonium hydroxide preparation tank (1) connect, flow control valve (2), flow
Count (3), defeated ammonia pump (4), ammonia spraying amount automatic control device (5) and connecting pipe；The dore furnace combustion apparatus includes dore furnace
Furnace body (6), tertiary-air pipe (7), gas inlet (8), ammonia water spray gun (9)；Furnace body is being decomposed in ammonia water spray gun (9) setting
(6) upper end, in the bottom for decomposing furnace body (6), the tertiary-air pipe (7) is located next to flue gas for gas inlet (8) setting
Import (8) setting；Ammonia water spray gun (9) eject position above fuel-rich regions, the regional temperature be 850-900 DEG C between,
It arranges that 4 ammonia water spray guns are located at furnace body wall surface equidistant in same absolute altitude, is symmetric.
2. cement decomposing furnace according to claim 1 directly spray ammonia reduce NOx device, which is characterized in that bottom flue gas into
Mouth (8) wind speed is about 30m/s, and high-speed flow is conducive to optimization burner hearth entirety flow field, avoids localized hyperthermia, while being also beneficial to reduce
NOx emission concentration.
3. cement decomposing furnace according to claim 1, which directly sprays ammonia, reduces NOx device, which is characterized in that low-NOx combustor
On ammonia water spray gun (9) use mechanical atomization, and be not necessarily to air distribution, by defeated ammonia pump (4) provide pressure high speed inject furnace on
It rises in air-flow, the NH decomposited3Ingredient mixes generation reduction reaction with the NOx generated in flue gas is risen, to substantially reduce coal
The concentration of emission of powder burning NOx.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727865.3U CN208287788U (en) | 2017-12-12 | 2017-12-12 | Cement decomposing furnace, which directly sprays ammonia, reduces NOx device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727865.3U CN208287788U (en) | 2017-12-12 | 2017-12-12 | Cement decomposing furnace, which directly sprays ammonia, reduces NOx device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208287788U true CN208287788U (en) | 2018-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191089A (en) * | 2020-08-20 | 2021-01-08 | 广西鱼峰水泥股份有限公司 | Decomposing furnace for reducing ammonia water consumption in nitrogen oxide treatment process and application method thereof |
-
2017
- 2017-12-12 CN CN201721727865.3U patent/CN208287788U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191089A (en) * | 2020-08-20 | 2021-01-08 | 广西鱼峰水泥股份有限公司 | Decomposing furnace for reducing ammonia water consumption in nitrogen oxide treatment process and application method thereof |
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Effective date of registration: 20220215 Address after: 255000 No.1, 202 Jinjing Avenue, high tech Zone, Zibo City, Shandong Province Patentee after: Zibo hanergy Qingyuan Intelligent Technology Co.,Ltd. Address before: 100070 3rd floor, building 2, area 10, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee before: BEIJING HANERGY QINGYUAN TECHNOLOGY CO.,LTD. Patentee before: LANGFANG HANNENG QINGYUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20221012 Address after: 100070 Building 2, area 10, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee after: BEIJING HANERGY QINGYUAN TECHNOLOGY CO.,LTD. Address before: 255000 No.1, 202 Jinjing Avenue, high tech Zone, Zibo City, Shandong Province Patentee before: Zibo hanergy Qingyuan Intelligent Technology Co.,Ltd. |
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Effective date of registration: 20230621 Address after: 100070 3rd floor, building 2, area 10, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee after: BEIJING HANERGY QINGYUAN TECHNOLOGY CO.,LTD. Patentee after: Beijing Zhonghan Quanneng Technology Co.,Ltd. Address before: 100070 Building 2, area 10, 188 South 4th Ring Road West, Fengtai District, Beijing Patentee before: BEIJING HANERGY QINGYUAN TECHNOLOGY CO.,LTD. |
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