CN202497790U - Injection device for selective non-catalytic reduction denitration - Google Patents
Injection device for selective non-catalytic reduction denitration Download PDFInfo
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- CN202497790U CN202497790U CN2012200799203U CN201220079920U CN202497790U CN 202497790 U CN202497790 U CN 202497790U CN 2012200799203 U CN2012200799203 U CN 2012200799203U CN 201220079920 U CN201220079920 U CN 201220079920U CN 202497790 U CN202497790 U CN 202497790U
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Abstract
The utility model discloses an injection device for selective non-catalytic reduction denitration, and relates to a flue gas purification denitration device; the injection device comprises a spray gun provided with a compressed air channel and a urea solution channel, and a compressed air pipeline and a urea solution pipeline which are respectively communicated with the spray gun; the urea solution pipeline comprises a urea water solution storage tank, a first filter group, a urea solution pump, a static mixer and a second filter group which are sequentially communicated by a pipeline; an inlet end of the static mixer is also communicated and provided with a dilution water pipeline provided with a dilution water pump; the compressed air pipeline comprises a compressed air source, a compressed air buffer tank and a third filter group which are sequentially communicated by a pipeline; and outlet pipelines of the second filter group and the third filter group are communicated with the spray gun. The injection device is high in denitration efficiency, more reliable in running and simple and easy to maintain.
Description
Technical field
The utility model relates to a kind of gas cleaning denitrification apparatus.
Background technology
China's nitrogen oxide emission is huge, and oneself becomes the atmosphere pollution that is only second to sulfur dioxide, and acid rain problem, air quality problems, atmosphere ozone layer destroying are more and more outstanding.China becomes big acid rain district, third place in the world after Europe and North America at present, thereby causes serious environmental pressure for the sustainable development of China's economy.
The SNCR cardinal principle is not have under the catalyst action, in 870～1150 ℃ of high-temperature flue gas, sprays denitrfying agent, and the NOx reaction generates N in reducing agent and the flue gas
2But the injection apparatus that is used to spray denitrfying agent at present exists the problem that denitration efficiency is not high, operational reliability is not high.
The utility model content
The purpose of the utility model is: propose a kind of injection apparatus that is used for the SNCR denitration, its denitration efficiency is higher, operation is more reliable, be simple and easy to maintenance.
The purpose of the utility model realizes through following technical proposals:
A kind of injection apparatus that is used for the SNCR denitration; Comprise the spray gun that is provided with compressed air channel and urea liquid passage; And compressed air line that is communicated with spray gun respectively and urea liquid pipeline; Said urea liquid pipeline comprises aqueous solution of urea storage tank, first filter set, urea solution pump, static mixer, second filter set of passing through pipeline connection successively; The arrival end of said static mixer also is communicated with the dilution water pipeline that is provided with the dilution water pump; Said compressed air line comprises that successively through compressed air source, compressed air surge tank, the 3rd filter set of pipeline connection, the export pipeline of said second and third filter set is communicated with said spray gun.
Above-mentioned first filter set can prevent in the aqueous solution of urea impurity and not dissolved urea to the damage of urea solution pump.Because storage is the aqueous solution of urea of 40-50% mass concentration in the urea storage tank, all can make the aqueous solution of urea crystallization under the situation of the low and excessive concentration of temperature, if it is excessive to the infringement of pump directly to get into the pump housing.Second and third filter set can effectively avoid reducing agent injector liquid road to stop up, thereby avoids causing spray gun to damage.Static mixer can guarantee the abundant mixing of aqueous solution of urea and dilution water, and blender can make two fluid streams mix fast, will make the concentration of aqueous solution of urea enter in each spray gun to differ, influence denitration effect as not adopting.The compressed air surge tank, thus can prevent that the compressed air pressure instability from causing that SNCR injection apparatus flow is unstable to cause problems such as denitration effect is not good.
As optimal way, also be provided with between said urea solution pump and the static mixer one lead to the aqueous solution of urea storage tank reflux line.
Above-mentioned reflux line can guarantee the easy adjusting of aqueous solution of urea flow and the safety of aqueous solution of urea pump.
As optimal way, also be communicated with the aqueous solution of urea scavenging pipeline that is provided with valve between the export pipeline of said second and third filter set.
Above-mentioned compressed air scavenging pipeline; When this injection apparatus does not move, open this pipe valve, the urea liquid pipeline is purged; To prevent urea liquid residual in pipeline; Urea liquid will make aqueous solution of urea stop transport also can't to purge more than 30 minutes clean residual in the pipeline, through this device, will make that raffinate purges clean in 5 minutes in the pipeline.
As optimal way, inner ring is a compressed air channel in the inner passage of said spray gun, and the outer ring is the urea liquid passage.
Existing spray gun is that urea is walked inner ring, and compressed air is walked the structure of outer ring, aqueous solution of urea often takes place in the production in gun barrel, just gasified, and makes the operation that spray gun can't be normally and efficiently.In this programme, outer ring denitrfying agent aqueous solution of urea flows, and inner ring compressed air flows, and flows through its outer ring denitrfying agent aqueous solution spray gun is cooled off, and simple change can prevent effectively that spray gun from inserting back high-temperature flue gas ablation spray gun.
As optimal way, said spray gun comprise the spray gun sleeve pipe that is furnished with the airtight wind of compressed air in it, can be in the spray gun sleeve pipe stretching motion and the gun barrel that stretches out.
In the such scheme, the spray gun gun barrel has flexible ability, when spray gun uses, inserts; Withdraw from when not using; And have compressed air sealing wind in the spray gun sleeve pipe,, prevent the particles clog nozzle in the flue gas simultaneously to prevent spray gun malleation high-temperature flue gas ablation spray gun in the stove when not moving.
Preferred as further, said second filter set is that a work filter and a reserve filter compose in parallel.
In the above-mentioned parallel-connection structure, in the time of work plugged filter maintenance etc., the operation reserve filter; Making does not influence the normal operation of SNCR denitrification apparatus, existing single filter, and it causes plugged filter; Whole system need be stopped transport and cleared up filter; After adopting this configuration, need not the stoppage in transit system, also can clear up.
The workflow of the utility model: the aqueous solution of urea in the aqueous solution of urea storage tank pumps in the static mixer through urea solution pump after first filter set is filtered; Behind the dilution water mixed diluting that pumps into of dilution water pump; After filtering once more through second filter set, together get into spray gun with compressed air in the compressed air line.
The beneficial effect of the utility model: take into full account and overcome existing injection apparatus and exist and variously cause that efficient is low, the defective of operation stability difference, operation is more reliable, be simple and easy to safeguard.Adopt this injection apparatus can make the SNCR denitration efficiency reach 30%～60%, satisfy national requirements for environmental protection.Be derived from simultaneously the system of SCR technology relatively, the complicacy of having saved traditional SCR technology and expensive ammonia spray barrier and control system thereof, static mixer, make the low and good operation stability of flue gas resistance.Need not to adopt expensive catalysts.Reduced the requirement of technology, also reduced cost of investment simultaneously arrangement space.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the insertion view of the spray gun of the utility model embodiment;
Fig. 3 be the utility model embodiment spray gun extract view;
Among the figure, 1-aqueous solution of urea storage tank, 2-agitator, 3-first filter set, 4-urea solution pump; The 5-reflux line, 6-dilutes water pump, 7-static mixer, 8-second filter set, 9-the 3rd filter set; 10-compressed air surge tank, 11-spray gun, 12-aqueous solution of urea scavenging pipeline, 13-spray gun sleeve pipe, 14-gun barrel; The 15-compressed air channel, 16-urea liquid passage, 17-heat-insulation layer, 18-furnace wall.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing the utility model is further described.
Like Fig. 1,2, shown in 3; A kind of injection apparatus that is used for the SNCR denitration; Comprise the spray gun 11 that is provided with compressed air channel and urea liquid passage; And compressed air line that is communicated with spray gun 11 respectively and urea liquid pipeline; The urea liquid pipeline comprise successively aqueous solution of urea storage tank 1 through pipeline connection (storage be the aqueous solution of urea of 40-50% mass concentration; Be provided with agitator 2 in it), first filter set 3, urea solution pump 4, static mixer 7, second filter set 8, also be provided with between urea solution pump 4 and the static mixer 7 one lead to aqueous solution of urea storage tank 1 reflux line 5, the arrival end of static mixer 7 also is communicated with the dilution water pipeline that is provided with dilution water pump 6.Compressed air line comprises successively compressed air source, compressed air surge tank 10, the 3rd filter set 9 through pipeline connection.The export pipeline of second and third filter set 8,9 is communicated with spray gun 11, also is communicated with the aqueous solution of urea scavenging pipeline 12 that is provided with valve between the export pipeline of second and third filter set 8,9.Said spray gun 11 passes heat-insulation layer 17 and furnace wall 18, comprise the spray gun sleeve pipe 13 that is furnished with the airtight wind of compressed air in it, can be in spray gun sleeve pipe 13 stretching motion and the gun barrel 14 that stretches out.Inner ring is a compressed air channel 15 in the gun barrel 14, and the outer ring is a urea liquid passage 16.First, second and third filter set 3,8,9 can be used for one or more filter series, parallel simultaneously, or the mode of work and subsequent use parallel connection use, and its filter form is preferably y-type filter, and material is 316 anti-aqueous solution of urea corrosion steel.Shown in present embodiment, first and third filter set 3,9 is a single filter, and second filter set 8 is that a work filter and a reserve filter compose in parallel.The filter of first filter set 3, its order number is preferably the 10-50 order, and filter order number is too many, is prone to cause resistance excessive, and exerting oneself of pump can't meet the demands, and crosses can cause at least and can't cause good filter effect.The filter of second and third filter set 8,9, its order number need to dispose according to the difference of rifle, are preferably the 50-100 order.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (6)
1. injection apparatus that is used for the SNCR denitration; It is characterized in that: comprise the spray gun that is provided with compressed air channel and urea liquid passage; And compressed air line that is communicated with spray gun respectively and urea liquid pipeline; Said urea liquid pipeline comprises aqueous solution of urea storage tank, first filter set, urea solution pump, static mixer, second filter set of passing through pipeline connection successively; The arrival end of said static mixer also is communicated with the dilution water pipeline that is provided with the dilution water pump; Said compressed air line comprises that successively through compressed air source, compressed air surge tank, the 3rd filter set of pipeline connection, the export pipeline of said second and third filter set is communicated with said spray gun.
2. the injection apparatus that is used for the SNCR denitration as claimed in claim 1 is characterized in that: also be provided with between said urea solution pump and the static mixer one lead to the aqueous solution of urea storage tank reflux line.
3. the injection apparatus that is used for the SNCR denitration as claimed in claim 1 is characterized in that: also be communicated with the aqueous solution of urea scavenging pipeline that is provided with valve between the export pipeline of said second and third filter set.
4. the injection apparatus that is used for the SNCR denitration as claimed in claim 1 is characterized in that: inner ring is a compressed air channel in the inner passage of said spray gun, and the outer ring is the urea liquid passage.
5. the injection apparatus that is used for the SNCR denitration as claimed in claim 1 is characterized in that: said spray gun comprise the spray gun sleeve pipe that is furnished with the airtight wind of compressed air in it, can be in the spray gun sleeve pipe stretching motion and the gun barrel that stretches out.
6. the injection apparatus that is used for the SNCR denitration described in arbitrary claim in the claim 1 to 5 is characterized in that: said second filter set is that a work filter and a reserve filter compose in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200799203U CN202497790U (en) | 2012-03-06 | 2012-03-06 | Injection device for selective non-catalytic reduction denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200799203U CN202497790U (en) | 2012-03-06 | 2012-03-06 | Injection device for selective non-catalytic reduction denitration |
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| Publication Number | Publication Date |
|---|---|
| CN202497790U true CN202497790U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200799203U Expired - Lifetime CN202497790U (en) | 2012-03-06 | 2012-03-06 | Injection device for selective non-catalytic reduction denitration |
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| CN (1) | CN202497790U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015021644A1 (en) * | 2013-08-16 | 2015-02-19 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| US9822685B2 (en) | 2013-08-16 | 2017-11-21 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
-
2012
- 2012-03-06 CN CN2012200799203U patent/CN202497790U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015021644A1 (en) * | 2013-08-16 | 2015-02-19 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN105492731A (en) * | 2013-08-16 | 2016-04-13 | 天纳克汽车经营有限公司 | Water injection exhaust treatment system |
| US9334775B2 (en) | 2013-08-16 | 2016-05-10 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| US9822685B2 (en) | 2013-08-16 | 2017-11-21 | Tenneco Automotive Operating Company Inc. | Water injection exhaust treatment system |
| CN105492731B (en) * | 2013-08-16 | 2018-09-11 | 天纳克汽车经营有限公司 | Water injection type exhaust-gas treatment system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |
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| CX01 | Expiry of patent term |