CN204911185U - Non - catalytic reduction SNCR reaction system of selectivity - Google Patents
Non - catalytic reduction SNCR reaction system of selectivity Download PDFInfo
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- CN204911185U CN204911185U CN201520543068.4U CN201520543068U CN204911185U CN 204911185 U CN204911185 U CN 204911185U CN 201520543068 U CN201520543068 U CN 201520543068U CN 204911185 U CN204911185 U CN 204911185U
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- reducing agent
- sncr
- spray gun
- reaction system
- boiler
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Abstract
The utility model discloses a non - catalytic reduction SNCR reaction system of selectivity, include: reductant supply unit, the air feed unit, the spray gun, the NOx content testing ware, ammonia concentration detection appearance and controller, wherein, spray gun one end with reductant supply unit and air feed unit connection, the other end sets up in the boiler, the spray gun with be provided with the governing valve of adjusting the reductant supply between the reductant supply unit, NOx content testing ware and ammonia concentration detection appearance all set up in the gas vent department of boiler, the controller with the NOx content testing ware reaches ammonia concentration detection appearance is connected, is used for the basis the NOx content testing ware reaches the testing result of ammonia concentration detection appearance is adjusted the governing valve. This non - catalytic reduction SNCR reaction system of selectivity simple structure, reasonable in design, simple to operate can adjust the injection quantity of reductant according to the escape rate of denitration efficiency and reductant in real time to reach better denitrification effect.
Description
Technical field
The utility model relates to denitrating flue gas field, specifically provides a kind of SNCR SNCR reaction system.
Background technology
SNCR SNCR denitration method utilizes reducing agent not having with the NOx in flue gas, chemical reaction to occur selectively under catalyst action, generates the method for nitrogen and water, is one of main at present method of denitration.When using SNCR technology, need constantly to carry reducing agent in boiler, and in existing technology, the concentration of injection reduction agent generally sets before boiler work, and remain unchanged in the course of work of boiler, that is: real-time automatic adjustment can not be made according to the emitted dose of escapement ratio to reducing agent of the denitration rate of flue gas and reducing agent.
Therefore, how structural improvement is carried out to existing SNCR SNCR reaction system, to realize detecting the efficiency of denitration and the escapement ratio of reducing agent in real time, and the emitted dose of reducing agent can be regulated according to testing result, become people's problem demanding prompt solution.
Utility model content
Given this, the purpose of this utility model is to provide a kind of SNCR SNCR reaction system, to solve existing SNCR SNCR reaction system cannot regulate the reducing agent sprayed in boiler in real time emitted dose problem according to the reductant concentration at boiler exhaust mouth place and denitration efficiency.
The technical scheme that the utility model provides is: a kind of SNCR SNCR reaction system, comprising:
Reducing agent feed unit, for providing amino reductive;
Air supply unit, for providing oxygen;
Spray gun, one end is connected with described reducing agent feed unit and air supply unit, the other end is arranged in boiler, for to injection reduction agent and oxygen in described boiler, wherein, be provided with between described spray gun and described reducing agent feed unit and regulate described reducing agent feed unit to reduce the control valve of dosage to described spray gun supply;
NOx content detector, is arranged at the exhaust ports of described boiler, for detecting the content of NOx in Exhaust Gas;
Ammonia density detector, is arranged at the exhaust ports of described boiler, for detecting the concentration of ammonia in Exhaust Gas;
Controller, is connected with described NOx content detector and described ammonia density detector, for regulating described control valve according to the testing result of described NOx content detector and described ammonia density detector.
Preferably, the reducing agent stoste feed unit that described reducing agent feed unit comprises dilution water unit and is connected with described dilution water unit, wherein, the liquid in described dilution water unit and described reducing agent stoste feed unit is by being mixed to form the reducing agent of prescribed concentration.
Further preferably, described boiler inner wall being provided with vertical section is leg-of-mutton smoke deflector, and wherein, described smoke deflector is positioned at the front of described spray gun, and wherein, described front refers to the direction of the first process of flue gas.
Further preferably, described spray gun is vertical with the flue gas direct of travel in boiler.
Further preferably, described spray gun is 2.
Further preferably, described reducing agent feed unit and be provided with equal sub-module between described air supply unit and described spray gun, on average supplying reducing agent and oxygen to described spray gun.
Further preferably, described reducing agent is liquefied ammonia, ammoniacal liquor or urea.
The SNCR SNCR reaction system that the utility model provides, reducing agent and oxygen is provided through spray gun to boiler by reducing agent feed unit and air supply unit, the NOx produced in described reducing agent and oxygen and boiler reacts, realize denitration, wherein, the exhaust outlet of described boiler is provided with NOx content detector and ammonia density detector, for the concentration of the content and escape ammonia that detect the NOx of discharge, wherein, the content of NOx reflects the denitration efficiency of system, described SNCR SNCR reaction system also comprises the controller be connected with described NOx content detector and described ammonia density detector, wherein, described controller can regulate described control valve according to the testing result of described NOx content detector and described ammonia density detector, realize the adjustment to reducing agent emitted dose, concrete: when the content height of the NOx of Exhaust Gas, increase the emitted dose of reducing agent, when the ammonia density height of discharging, reduce the emitted dose of reducing agent.
The SNCR SNCR reaction system that the utility model provides, structure is simple, reasonable in design, easy for installation, can adjust the emitted dose of reducing agent in real time, to reach better denitration effect according to the escapement ratio of denitration efficiency and reducing agent.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the utility model is described in further detail:
Fig. 1 is SNCR SNCR reaction system structural representation.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is further explained, but does not limit to the utility model.
As shown in Figure 1, the utility model provides a kind of SNCR SNCR reaction system, comprise: for providing the reducing agent feed unit 1 of amino reductive, for providing the air supply unit 2 of oxygen, one end is connected with described reducing agent feed unit 1 and air supply unit 2, the other end is arranged at the spray gun 3 in boiler 4, the NOx content detector 5 being arranged at the exhaust ports of described boiler 4 and ammonia density detector 6 and the controller 7 be connected with described NOx content detector 5 and described ammonia density detector 6, wherein, be provided with between described spray gun 3 and described reducing agent feed unit 1 and regulate described reducing agent feed unit 1 to supply to described spray gun 3 to reduce the control valve 10 of dosage, described NOx content detector 5 is for detecting the content of NOx in Exhaust Gas, described ammonia density detector 6 is for detecting the concentration of ammonia in Exhaust Gas, described controller 7 regulates described control valve 10 according to the testing result of described NOx content detector 5 and described ammonia density detector 6, realize the adjustment to reducing agent emitted dose, to reach better denitration effect, wherein, described reducing agent is liquefied ammonia, ammoniacal liquor or urea.
This SNCR SNCR reaction system, reducing agent and oxygen is provided through spray gun to boiler by reducing agent feed unit and air supply unit, the NOx produced in described reducing agent and oxygen and boiler reacts, realize denitration, wherein, the exhaust outlet of described boiler is provided with NOx content detector and ammonia density detector, for the concentration of the content and escape ammonia that detect the NOx of discharge, wherein, the content of NOx reflects the denitration efficiency of system, described SNCR SNCR reaction system also comprises the controller be connected with described NOx content detector and described ammonia density detector, wherein, described controller can regulate described control valve according to the testing result of described NOx content detector and described ammonia density detector, realize the adjustment to reducing agent emitted dose, concrete: when the content height of the NOx of Exhaust Gas, increase the emitted dose of reducing agent, when the ammonia density height of discharging, reduce the emitted dose of reducing agent.
Wherein, as shown in Figure 1, the reducing agent stoste feed unit 12 that described reducing agent feed unit 1 comprises dilution water unit 11 and is connected with described dilution water unit 11, wherein, described dilution water unit 11 and the liquid in described reducing agent stoste feed unit 12 are by mixing the reducing agent that can form prescribed concentration.
In order to ensure that flue gas fully can react with the reducing agent that sprays in spray gun, as the improvement of technical scheme, as shown in Figure 1, described boiler inner wall being provided with vertical section is leg-of-mutton smoke deflector 9, and wherein, described smoke deflector 9 is positioned at the front of described spray gun 3, before described, the side of putting is the direction of flue gas line process, described smoke deflector plays guide effect to flue gas, and flue gas is assembled to spray gun, avoids flue gas fully not react with reducing agent from the side-walls of boiler and just escapes from fast.
In order to make NOx in boiler, oxygen and reducing agent fully react, and as the improvement of technical scheme, as shown in Figure 1, described spray gun 3 is 2, and more preferably, described spray gun 3 is vertical with the flue gas direct of travel in boiler.
In order to avoid spray gun causes reduction effect not good because reducing agent is unequal, as the improvement of technical scheme, as shown in Figure 1, described reducing agent feed unit 1 and be provided with equal sub-module 8 between described air supply unit 2 and described spray gun 3, for described spray gun 3 on average supply reducing agent and oxygen.
Detailed description of the invention of the present utility model carries out writing according to the mode of going forward one by one, and highlight the difference of each embodiment, its similar portion can cross-reference.
By reference to the accompanying drawings embodiment of the present utility model is elaborated above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.
Claims (7)
1. a SNCR SNCR reaction system, is characterized in that, comprising:
Reducing agent feed unit (1), air supply unit (2), spray gun (3), one end is connected with described reducing agent feed unit (1) and air supply unit (2), the other end is arranged in boiler (4), for to the interior injection reduction agent of described boiler (4) and oxygen, wherein, be provided with between described spray gun (3) and described reducing agent feed unit (1) and regulate described reducing agent feed unit (1) to supply to described spray gun (3) to reduce the control valve (10) of dosage;
NOx content detector (5), is arranged at the exhaust ports of described boiler (4), for detecting the content of NOx in Exhaust Gas;
Ammonia density detector (6), is arranged at the exhaust ports of described boiler (4), for detecting the concentration of ammonia in Exhaust Gas;
Controller (7), is connected with described NOx content detector (5) and described ammonia density detector (6), for regulating described control valve (10) according to the testing result of described NOx content detector (5) and described ammonia density detector (6).
2. according to SNCR SNCR reaction system described in claim 1, it is characterized in that: the reducing agent stoste feed unit (12) that described reducing agent feed unit (1) comprises dilution water unit (11) and is connected with described dilution water unit (11), wherein, described dilution water unit (11) and the liquid in described reducing agent stoste feed unit (12) are by being mixed to form the reducing agent of prescribed concentration.
3. according to SNCR SNCR reaction system described in claim 1, it is characterized in that: described boiler inner wall being provided with vertical section is leg-of-mutton smoke deflector (9), wherein, described smoke deflector (9) is positioned at the front of described spray gun (3).
4. according to SNCR SNCR reaction system described in claim 1, it is characterized in that: described spray gun (3) is vertical with the flue gas direct of travel in boiler.
5. according to SNCR SNCR reaction system described in claim 1, it is characterized in that: described spray gun (3) is 2.
6. according to SNCR SNCR reaction system described in claim 5, it is characterized in that: described reducing agent feed unit (1) and be provided with equal sub-module (8) between described air supply unit (2) and described spray gun (3), for described spray gun (3) on average supply reducing agent and oxygen.
7. according to SNCR SNCR reaction system according to any one of claim 1 to 6, it is characterized in that: described reducing agent is liquefied ammonia, one of ammoniacal liquor or urea.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520543068.4U CN204911185U (en) | 2015-07-24 | 2015-07-24 | Non - catalytic reduction SNCR reaction system of selectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520543068.4U CN204911185U (en) | 2015-07-24 | 2015-07-24 | Non - catalytic reduction SNCR reaction system of selectivity |
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| CN204911185U true CN204911185U (en) | 2015-12-30 |
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| CN201520543068.4U Expired - Fee Related CN204911185U (en) | 2015-07-24 | 2015-07-24 | Non - catalytic reduction SNCR reaction system of selectivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105903331A (en) * | 2016-06-18 | 2016-08-31 | 杭州新际能源科技有限公司 | Full-automatic SNCR flue gas denitration system and flue gas denitration control method |
| CN111359414A (en) * | 2020-03-16 | 2020-07-03 | 中国华能集团清洁能源技术研究院有限公司 | CFB boiler deep peak regulation composite type adjustable SNCR denitration system and method |
-
2015
- 2015-07-24 CN CN201520543068.4U patent/CN204911185U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105903331A (en) * | 2016-06-18 | 2016-08-31 | 杭州新际能源科技有限公司 | Full-automatic SNCR flue gas denitration system and flue gas denitration control method |
| CN105903331B (en) * | 2016-06-18 | 2018-05-01 | 杭州新际能源科技有限公司 | Full-automatic SNCR flue gas denitrification systems and its denitrating flue gas control method |
| CN111359414A (en) * | 2020-03-16 | 2020-07-03 | 中国华能集团清洁能源技术研究院有限公司 | CFB boiler deep peak regulation composite type adjustable SNCR denitration system and method |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20190724 |