CN102728208A - SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment - Google Patents
SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment Download PDFInfo
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- CN102728208A CN102728208A CN2012102538857A CN201210253885A CN102728208A CN 102728208 A CN102728208 A CN 102728208A CN 2012102538857 A CN2012102538857 A CN 2012102538857A CN 201210253885 A CN201210253885 A CN 201210253885A CN 102728208 A CN102728208 A CN 102728208A
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Abstract
The invention discloses an SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment, comprising a spray gun spray pipe, a sleeve which is sheathed on the spray gun spray pipe and a reducing agent inlet pipe, wherein the spray gun spray pipe is communicated with the reducing agent inlet pipe. The SNCR denitration automatic anti-blocking spray atomization spray gun device for smoke environment is characterized in that a ring-shaped dustproof plate is arranged between the sleeve and the spray gun spray pipe; the ring-shaped dustproof plate is located at a nozzle end of the spray gun spray pipe; a plurality of air holes are arranged on the ring-shaped dustproof plate; an air inlet pipe which is used for introducing compressed air from an air source is arranged on the sleeve; and the air holes are arranged on the ring-shaped dustproof plate in a circumferential equal manner. The SNCR denitration automatic anti-blocking spray atomization spray gun device for smoke environment is good in anti-blocking effect, simple in structure and easy for implementation.
Description
Technical field
The invention belongs to flue gas nitrogen oxide and reduce discharging (denitration) technical field, relate to a kind of SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment.
Background technology
SNCR (SNCR) denitrating technique is universally acknowledged high-temperature flue gas denitration mature technology, and is domestic from external introducing in recent years, at boiler of power plant, and extensive use in the high-temperature flue gas denitration engineerings such as cement plant.Its key problem in technology is the ad-hoc location installing spray gun in boiler (kiln) furnace wall, and denitrification reducing agent is sprayed into nitrogen oxide in burner hearth and the flue gas (NO and NO
2) carry out the SNCR reaction, with NO and NO
2Change into N
2And H
2O.The decisive factor of this reaction is a temperature, and only this reaction just can be carried out in 850 ° of C-1200 ° C temperature range.Being lower than this thermotonus can not carry out, and the reducing agent that sprays into when being higher than this temperature will be oxidized to NOx, not only can not fall nitrogen, also will increase its concentration.And the position that sprays into that will satisfy the said temperature requirement all is the high dirt section at boiler (kiln); Especially cement kiln; It meets spraying into a little at vertical decomposition furnace top and outlet section thereof of temperature requirement, and material concentration is high, and cement material very easily lumps; Harden after the moisture absorption, cause spray gun to stop up easily.
In the prior art, generally all be perforate pre-buried steel sleeve pipe on the furnace wall, the spray gun of injection reduction agent inserts burner hearth through sleeve pipe.After this device uses a period of time, dust stratification in sleeve pipe very easily, dust-contained airflow is brought the material dust into sleeve pipe and deposition in the stove; And; The larger particles material gets into sleeve pipe with air-flow easily, is stuck in the annulus between spray gun and sleeve pipe, has more accelerated the obstruction of sleeve pipe.Stop up and harden and constantly increase the weight of, will hinder also finally to cause spray nozzle clogging, reduce atomization quality, influence the mixed effect of reducing agent and flue gas, thereby reduce denitration efficiency.And after hardening in the sleeve pipe, spray gun is extracted difficulty out, and maintenance and maintenance all are difficult to carry out, and influence long-period stable operation.
Summary of the invention
Technical problem to be solved by this invention provides a kind of SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment; This SNCR denitration automatic block-resistant jet atomization spray gun device blocking-proof result that is used for the flue dust environment is good; And it is simple in structure, easy to implement.
The technical solution of invention is following:
A kind of SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment comprises the spray gun jet pipe, is sleeved on sleeve pipe and reducing agent inlet tube on the spray gun jet pipe; The spray gun jet pipe communicates with the reducing agent inlet tube, it is characterized in that, between sleeve pipe and spray gun jet pipe, is provided with annular dust excluding plate; Described annular dust excluding plate is positioned at the spout end of spray gun jet pipe.
The annular dust excluding plate is provided with a plurality of pores, and sleeve pipe is provided with and is used for introducing compressed-air actuated air inlet pipe from source of the gas.
Described a plurality of pore is arranged on the annular dust excluding plate with circumferential five equilibrium mode.
Sleeve pipe is provided with the air inlet pipe that is used for introducing from source of the gas gas, leaves the slit between annular dust excluding plate and spray gun jet pipe.
Annular dust excluding plate the inner has conical concave surface.
The sleeve pipe inner end is concordant with the furnace wall, and the outer section of sleeve pipe is in outside the furnace wall, and the outer section of sleeve pipe is provided with the Pressure gauge that is used to detect the cover intraductal atmospheric pressure, and air inlet pipe on the sleeve pipe and the gas circuit between the source of the gas are provided with barometric damper.
The outer end of sleeve pipe and spray gun jet pipe is provided with a lock-on connection.
The described SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment comprises also and is used to introduce compressed-air actuated spray gun compressed air inlet pipe that the spray gun gun barrel communicates with spray gun compressed air inlet pipe.
The inner end of sleeve pipe (the spout end of spray gun) is provided with increaser.
Beneficial effect:
The SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment of the present invention, the present invention prevents that through following a plurality of measures dust from stopping up spray gun:
1, in the spray gun sleeve pipe, introduces compressed air, keep pressure-fired in the sleeve pipe, prevent that dust-contained airflow from getting in the sleeve pipe;
2, in the spray gun exit, add annular micropore dust excluding plate in the annulus between spray gun jet pipe and sleeve pipe, stop that further in-furnace dust dirt particle gets in the sleeve pipe;
3, leave less slit between annular micropore dust excluding plate and spray gun jet pipe, and offer circular pore onboard, evenly distribute along circumference, compressed air blows out at a high speed through small gaps and pore, and the grit that is deposited on the sleeve pipe front end is blown away, and prevents its deposition and hardens;
4, spray gun sleeve pipe front end is made increaser, prevents that larger particles dirt slag from blocking to result in blockage.
More than each measure can adopt separately, when comprehensive the employing, effect is better;
In addition, also some parts have been carried out optimal design in the following aspects:
Spray gun is installed one with the sleeve pipe junction and is cooperated fast-assembled lock tight coupling closely, and one fixes spray gun, and two play the effect of envelope gas, prevent that gas releases outside stove in the sleeve pipe;
4, annular micropore dust excluding plate the inner is conical concave surface, makes things convenient for spray gun to insert and extracts out;
The present invention has following outstanding advantage:
(1) can not lump by dust stratification in the spray gun sleeve pipe, spray gun extraction and insertion activity are convenient to the spray gun inspection, safeguard and change nozzle etc. freely;
(2) stop the spray nozzle clogging phenomenon, keep spray effect not reduce, keep the stable and long-term operation of denitration effect;
(3) investment is little, compressed air consumption is minimum, does not increase operating cost basically;
(4) apparatus structure is simple, convenient processing and installation, no running gear, long service life.
On the whole, The present invention be directed to the high-temperature flue gas denitration and propose great optimal design, improve the spray gun device anti-blocking performance emphatically, safer on using, Maintenance and Repair are easy, security is higher, invest simultaneously little, operating cost is low, be suitable for promoting the use of.
Description of drawings
Fig. 1 is the general structure sketch map that is used for the SNCR denitration automatic block-resistant jet atomization spray gun device of flue dust environment;
Fig. 2 is that the A of Fig. 1 is to view.
Label declaration: 1: increaser; 2: annular dust excluding plate; 3: pore; 4: sleeve pipe; 5: the spray gun jet pipe; 6: Pressure gauge; 7: lock-on connection; 8: the reducing agent inlet tube; 9: spray gun compressed air inlet pipe; 10: sleeve pipe compressed air inlet pipe; 11: barometric damper.
The specific embodiment
Below will combine accompanying drawing and specific embodiment that the present invention is explained further details:
Embodiment 1:
A kind of SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment comprises the spray gun jet pipe, is sleeved on sleeve pipe and reducing agent inlet tube on the spray gun jet pipe; The spray gun jet pipe communicates with the reducing agent inlet tube, between sleeve pipe and spray gun jet pipe, is provided with annular dust excluding plate; Described annular dust excluding plate is positioned at the spout end of spray gun jet pipe.
The annular dust excluding plate is provided with a plurality of pores, and sleeve pipe is provided with and is used for introducing compressed-air actuated air inlet pipe from source of the gas.
Described a plurality of pore is arranged on the annular dust excluding plate with circumferential five equilibrium mode.Pore is a circular port.
Sleeve pipe is provided with the air inlet pipe that is used for introducing from source of the gas gas, leaves the slit between annular dust excluding plate and spray gun jet pipe.
The employing in pore and slit makes compressed air blow out at a high speed through small gaps and pore, and the grit that is deposited on the sleeve pipe front end is blown away, and prevents its deposition and hardens;
Annular dust excluding plate the inner has conical concave surface, makes things convenient for spray gun to insert and extraction, easy access;
The sleeve pipe inner end is concordant with the furnace wall, and the outer section of sleeve pipe is in outside the furnace wall, and the outer section of sleeve pipe is provided with the Pressure gauge (claiming vacuum meter again) that is used to detect the cover intraductal atmospheric pressure, and air inlet pipe on the sleeve pipe and the gas circuit between the source of the gas are provided with barometric damper.
The outer end of sleeve pipe and spray gun jet pipe is provided with a lock-on connection.
The described SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment comprises also and is used to introduce compressed-air actuated spray gun compressed air inlet pipe that the spray gun gun barrel communicates with spray gun compressed air inlet pipe.
The inner end of sleeve pipe (the spout end of spray gun) is provided with increaser, can prevent that larger particles dirt slag from blocking to result in blockage, and also can optimize the spray gun atomizing effect, improves the jet atomization performance.
Spray gun and sleeve pipe junction are installed one and are cooperated fast-assembled lock tight coupling closely (lock-on connection be configured to prior art), and one fixes spray gun, and two play the effect of envelope gas;
Said structure combines, and plays to prevent that in-furnace dust dirt from getting into sleeve pipe and deposit, harden, and forms and stops up, ward off exempt from ash harden plug nozzle with influence atomizing effect.
Adopt high density nozzle (nozzle is a prior art) to carry out mechanical atomization; Carry out the degree of depth through compressed air and spray, the dustproof sleeve pipe of gun design inserts in the high cloud of dust gas of furnace high-temperature through preset hole, furnace wall simultaneously; Design has the annular dust excluding plate and the pressure gauge of pore in the sleeve pipe; Through inserting compressed air, keep pressure-fired in the sleeve pipe, stop high cloud of dust gas entering sleeve pipe and cause spray gun and spray nozzle clogging.
The above has only described basic implementation process, is not the restriction to implementation process.The those skilled in the art also can make other multi-form variations on the basis of above-mentioned explanation; This explanation can't also need not the variation of all embodiments is all listed, and the conspicuous version of being drawn thus all is in protection scope of the present invention.
Claims (10)
1. a SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment comprises the spray gun jet pipe, is sleeved on sleeve pipe and reducing agent inlet tube on the spray gun jet pipe; The spray gun jet pipe communicates with the reducing agent inlet tube, it is characterized in that, between sleeve pipe and spray gun jet pipe, is provided with annular dust excluding plate; Described annular dust excluding plate is positioned at the spout end of spray gun jet pipe.
2. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 1 is characterized in that annular dust excluding plate is provided with a plurality of pores, and sleeve pipe is provided with and is used for introducing compressed-air actuated air inlet pipe from source of the gas.
3. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 2 is characterized in that described a plurality of pores are arranged on the annular dust excluding plate with circumferential five equilibrium mode.
4. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 1 is characterized in that, sleeve pipe is provided with the air inlet pipe that is used for introducing from source of the gas gas, leaves the slit between annular dust excluding plate and spray gun jet pipe.
5. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 1 is characterized in that annular dust excluding plate the inner has conical concave surface.
6. according to each described SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment of claim 2-4; It is characterized in that; The sleeve pipe inner end is concordant with the furnace wall; The outer section of sleeve pipe is in outside the furnace wall, and the outer section of sleeve pipe is provided with the Pressure gauge that is used to detect the cover intraductal atmospheric pressure, and air inlet pipe on the sleeve pipe and the gas circuit between the source of the gas are provided with barometric damper.
7. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 1 is characterized in that the outer end of sleeve pipe and spray gun jet pipe is provided with a lock-on connection.
8. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 1 is characterized in that also comprise being used to introduce compressed-air actuated spray gun compressed air inlet pipe, the spray gun gun barrel communicates with spray gun compressed air inlet pipe.
9. according to claim 1,2,3,4,5, the 7 or 8 described SNCR denitration automatic block-resistant jet atomization spray gun devices that are used for the flue dust environment, it is characterized in that the inner end of sleeve pipe is provided with increaser.
10. the SNCR denitration automatic block-resistant jet atomization spray gun device that is used for the flue dust environment according to claim 6 is characterized in that the inner end of sleeve pipe is provided with increaser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253885.7A CN102728208B (en) | 2012-07-20 | 2012-07-20 | SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment |
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|---|---|---|---|
| CN201210253885.7A CN102728208B (en) | 2012-07-20 | 2012-07-20 | SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment |
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| CN102728208A true CN102728208A (en) | 2012-10-17 |
| CN102728208B CN102728208B (en) | 2014-10-29 |
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| CN201210253885.7A Active CN102728208B (en) | 2012-07-20 | 2012-07-20 | SNCR (Selective Non Catalytic Reduction) denitration automatic anti-blocking spray atomization spray gun device for smoke environment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230741A (en) * | 2013-05-17 | 2013-08-07 | 南京凯盛国际工程有限公司 | Movable spray gun device |
| CN103506234A (en) * | 2013-09-27 | 2014-01-15 | 中节能六合天融环保科技有限公司 | SNCR flue gas denitration spray gun and double-cavity mixing double-layer injection technology thereof |
| CN106139851A (en) * | 2015-03-30 | 2016-11-23 | 杨建华 | A kind of Denitration in Boiler Multi-nozzle spray gun |
| CN108284035A (en) * | 2018-03-26 | 2018-07-17 | 中国华电科工集团有限公司 | A kind of system and method preventing spray tip fouling |
| CN109399747A (en) * | 2018-11-23 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | Spray gun and be suitable for desulfurization wastewater flue vaporising device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230741A (en) * | 2013-05-17 | 2013-08-07 | 南京凯盛国际工程有限公司 | Movable spray gun device |
| CN103506234A (en) * | 2013-09-27 | 2014-01-15 | 中节能六合天融环保科技有限公司 | SNCR flue gas denitration spray gun and double-cavity mixing double-layer injection technology thereof |
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| CN106139851A (en) * | 2015-03-30 | 2016-11-23 | 杨建华 | A kind of Denitration in Boiler Multi-nozzle spray gun |
| CN108284035A (en) * | 2018-03-26 | 2018-07-17 | 中国华电科工集团有限公司 | A kind of system and method preventing spray tip fouling |
| CN109399747A (en) * | 2018-11-23 | 2019-03-01 | 国网新疆电力有限公司电力科学研究院 | Spray gun and be suitable for desulfurization wastewater flue vaporising device |
| CN109399747B (en) * | 2018-11-23 | 2024-01-12 | 国网新疆电力有限公司电力科学研究院 | Spray gun and flue evaporation device suitable for desulfurization waste water |
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