CN202983932U - Reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration - Google Patents
Reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration Download PDFInfo
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- CN202983932U CN202983932U CN 201220712468 CN201220712468U CN202983932U CN 202983932 U CN202983932 U CN 202983932U CN 201220712468 CN201220712468 CN 201220712468 CN 201220712468 U CN201220712468 U CN 201220712468U CN 202983932 U CN202983932 U CN 202983932U
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Abstract
The utility model provides a reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration. The reducing agent atomizing spray gun comprises a liquid pipe, a gas pipe, a gas and liquid mixing pipe, a tapered pipe, an injection spray pipe, a nozzle, a distributor and a liquid pipe sealing plate. The distributor is arranged between the gas and liquid mixing pipe and the tapered pipe, the gas and liquid mixing pipe is connected with the tapered pipe, the injection spray pipe and the distributor by means of welding, the gas pipe is arranged on a side surface of the gas and liquid mixing pipe, one end of the liquid pipe extends into the gas and liquid mixing pipe, spray holes are peripherally arranged at the tail of the liquid pipe, the liquid pipe sealing plate is arranged at an end of the liquid pipe, and spray holes are arranged on the liquid pipe sealing plate. The reducing agent atomizing spray gun has the advantages that the reducing agent atomizing spray gun is simple in structure, low in manufacturing cost, extremely convenient to install and detach, good in atomizing effect, free of water drops and high in denitration efficiency, and the running cost is reduced.
Description
Technical field
The utility model relates to coal-fired flue gas denitration, particularly a kind of reducing agent atomizing lance for the SNCR denitrating technique.
Background technology
Along with the develop rapidly of China's economy and industry, atmosphere pollution sulfur dioxide and nitrogen oxide emission also increase sharply.In recent years, some metropolitan air nitrous oxides concentrations of China exceed standard, and the environmental carrying capacity of nitrogen oxide is in saturation state substantially, and some places even produce the photochemical fog phenomenon.At present, due to the restriction that is subjected to the aspects such as operational management and expense, SNCR (Selective Non-Catalytic Reduction, SNCR) gas denitrifying technology is mainly selected in China's middle and small burn coal boiler and middle-size and small-size cement kiln flue gas denitration.The SNCR denitration technology is that the reducing agent (as ammoniacal liquor or urea etc.) that contains the NHx base is sprayed into temperature in burner hearth is the zone of 800-1100 ℃, and the rapid thermal decomposition of this reducing agent becomes NH
3With other accessory substance, NH subsequently
3Carry out the SNCR reaction and generate N with the nitrogen oxide (NOx) in flue gas
2
The key equipment of SNCR system is the reducing agent atomizing lance, by the reducing agent atomizing lance with spray into after reductant solution atomizing in burner hearth with flue gas in nitrogen oxide (NOx) carry out the SNCR reaction.
Because the environment temperature of work reaches as high as 1300 ℃, higher to the requirement of spray gun, the spray gun that present domestic SNCR system adopts is mainly take external import spray gun as main.This type of spray gun price is higher, and its atomization structure is only at the spray gun end, the mixed aerosol nozzle to be set, and gas-liquid is mixed aerosol endways, and gas-liquid contact time is short, atomizes inhomogeneous, easily produces drop; Simultaneously due to the atomizer of spray gun at high temperature for a long time, easily loss needs often to change, the spray gun atomizer and the rifle body that use at present are whole, change nozzle and change exactly whole spray gun, operating cost is higher.
Summary of the invention
For the defective of reducing agent atomizing lance in prior art, it is a kind of that the purpose of this utility model is to provide
Be used for the reducing agent atomizing lance of SNCR denitration, this spray gun structure is simple, cheap, atomizer is easily changed; Atomizing effect is good, does not have water droplet to produce.
The utility model is that the technical scheme that its technical problem of solution adopts is: comprise liquid line, flue, gas-liquid mixed pipe, conical pipe, injection spray pipe, nozzle, distributor, liquid line shrouding.Be provided with distributor between gas-liquid mixed pipe and conical pipe, gas-liquid mixed pipe and conical pipe, injection spray pipe, distributor are weldingly connected, gas-liquid mixed pipe side is provided with flue, one end of liquid line stretches in the gas-liquid mixed pipe, its afterbody circumferentially has spray-hole, the end is provided with the liquid line shrouding, has spray-hole on shrouding.
Described injection spray pipe external diameter is 20 ~ 40mm, and tail end arranges external screw thread.
The circumferential spray-hole quantity of described liquid line tail end is 25 ~ 40, diameter 1.2 ~ 6mm.
On described liquid line shrouding, spray-hole quantity is 4 ~ 6, and diameter is 1.2 ~ 5mm.
Described nozzle is the internal thread bellmouth, and the jet internal diameter is 2mm, and nozzle is threaded connection on injection spray pipe.
Evenly be provided with 18 ~ 25 filter openings on described distributor, diameter 2 ~ 6mm.
During work, liquid line is connected with the container that fills reductant solution, injects reductant solution in liquid line; Flue is connected with vapour source or compressed air source, injects atomization gas in the gas-liquid mixed pipe.When some spray-holes that reductant solution circumferentially has by the liquid line afterbody and the some spray-holes on the shrouding of end are ejected to the gas-liquid mixed pipe, tentatively be fractured into fine liquid particles or vaporific, again with after the atomization gas that injects at first contacts, rub first, mix in the gas-liquid mixed pipe, further reducing agent be broken into more tiny drop or be mixed near vaporific gas, then enter secondary friction after conical pipe and playpipe, mixing by the filter opening on distributor, current stabilization goes out by nozzle ejection.
The beneficial effects of the utility model are: the reducing agent atomizing lance is simple in structure, cost is low, it is very convenient to install, dismantle; Atomizing effect is good, does not have water droplet to produce, and denitration efficiency is high, has reduced operating cost; This reducing agent atomizing lance nozzle end can enter in boiler and caliber little, can not transform water-cooling wall during installation; Adopt compressed air as the atomizing source of the gas.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of distributor.
Fig. 3 is the structural representation of shrouding.
In figure, 1 is liquid line, and 2 is flue, and 3 is the gas-liquid mixed pipe, and 4 is conical pipe, and 5 is injection spray pipe, and 6 is nozzle, and 7 is distributor, and 8 is the liquid line shrouding.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
This specific embodiment comprises: liquid line 1, flue 2, gas-liquid mixed pipe 3, conical pipe 4, injection spray pipe 5, nozzle 6, distributor 7, liquid line shrouding 8.Be provided with distributor 7 between gas-liquid mixed pipe 3 and conical pipe 4, gas-liquid mixed pipe 3 and conical pipe 4, injection spray pipe 5, distributor 7 are weldingly connected, gas-liquid mixed pipe 3 sides are provided with flue 2, one end of liquid line 1 stretches in gas-liquid mixed pipe 3, the afterbody of liquid line 1 circumferentially has spray-hole, the end is provided with liquid line shrouding 8, has spray-hole on shrouding 8
Described injection spray pipe external diameter is 25mm, and tail end arranges external screw thread.
The circumferential spray-hole quantity of described liquid line tail end is 30, diameter 4mm.
On described liquid line shrouding, spray-hole quantity is 4, and diameter is 3mm.
Described nozzle is the internal thread bellmouth, and the jet internal diameter is 2mm, and nozzle is threaded connection on injection spray pipe.
Evenly be provided with 21 filter openings on described distributor, diameter 4mm.
During work, liquid line 1 is connected with the container that fills reductant solution, injects reductant solution in liquid line 1; Flue 2 is connected with vapour source or compressed air source, injects atomization gas in gas-liquid mixed pipe 3.When some spray-holes that reductant solution circumferentially has by liquid line 1 afterbody and the some spray-holes on end shrouding 8 are ejected to gas-liquid mixed pipe 3, tentatively be fractured into fine liquid particles or vaporific, contact with the atomization gas that injects at first again, rub first, mix in gas-liquid mixed pipe 3, further reducing agent be broken into more tiny drop or be mixed near vaporific gas, then enter conical pipe 4 and the rear secondary friction of playpipe 5, mixing by the filter opening on distributor 7, current stabilization ejects by nozzle 6.
Claims (5)
1. a reducing agent atomizing lance that is used for the SNCR denitration, comprise liquid line, flue, injection spray pipe, nozzle, it is characterized in that: also comprise gas-liquid mixed pipe, conical pipe, distributor, liquid line shrouding; Be provided with distributor between gas-liquid mixed pipe and conical pipe, gas-liquid mixed pipe and conical pipe, injection spray pipe, distributor are weldingly connected, and gas-liquid mixed pipe side is provided with flue, and an end of liquid line stretches in the gas-liquid mixed pipe.
2. a kind of reducing agent atomizing lance for the SNCR denitration according to claim 1, it is characterized in that: described injection spray pipe tail end arranges external screw thread, and nozzle is the internal thread bellmouth, and nozzle is threaded connection on injection spray pipe.
3. a kind of reducing agent atomizing lance for the SNCR denitration according to claim 1, is characterized in that: evenly be provided with 18 ~ 25 filter openings on described distributor, diameter 2 ~ 6mm.
4. described any is used for reducing agent atomizing lance of SNCR denitration according to claim 1 to 3, and it is characterized in that: the circumferential spray-hole quantity of described liquid line tail end is 25 ~ 40, diameter 1.2 ~ 6mm.
5. described any is used for reducing agent atomizing lance of SNCR denitration according to claim 1 to 3, and it is characterized in that: on described liquid line shrouding, spray-hole quantity is 4 ~ 6, and diameter is 1.2 ~ 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712468 CN202983932U (en) | 2012-12-21 | 2012-12-21 | Reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712468 CN202983932U (en) | 2012-12-21 | 2012-12-21 | Reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202983932U true CN202983932U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712468 Expired - Lifetime CN202983932U (en) | 2012-12-21 | 2012-12-21 | Reducing agent atomizing spray gun for SNCR (selective non-catalytic reduction) denitration |
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| CN (1) | CN202983932U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139871A (en) * | 2015-04-13 | 2016-11-23 | 北京美斯顿科技开发有限公司 | A kind of improved CO incinerator SNCR denitration device and method of denitration thereof |
-
2012
- 2012-12-21 CN CN 201220712468 patent/CN202983932U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139871A (en) * | 2015-04-13 | 2016-11-23 | 北京美斯顿科技开发有限公司 | A kind of improved CO incinerator SNCR denitration device and method of denitration thereof |
| CN106139871B (en) * | 2015-04-13 | 2019-10-11 | 北京美斯顿科技开发有限公司 | A kind of improved CO incinerator SNCR denitration device and its method of denitration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170831 Address after: 224051 Jiangsu environmental protection industrial park, No. 1, No. five road, Yancheng City Patentee after: JIANGSU KEHANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Address before: 753400 the Ningxia Hui Autonomous Region city Shizuishan Pingluo County farm (8 Youth Road) Patentee before: NINGXIA KEXING ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 224051 Jiangsu environmental protection industrial park, No. 1, No. five road, Yancheng City Patentee after: JIANGSU COHEN ENVIRONMENTAL PROTECTION CO.,LTD. Address before: 224051 Jiangsu environmental protection industrial park, No. 1, No. five road, Yancheng City Patentee before: JIANGSU KEHANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |