CN202366621U - Automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration - Google Patents
Automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration Download PDFInfo
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- CN202366621U CN202366621U CN 201120529953 CN201120529953U CN202366621U CN 202366621 U CN202366621 U CN 202366621U CN 201120529953 CN201120529953 CN 201120529953 CN 201120529953 U CN201120529953 U CN 201120529953U CN 202366621 U CN202366621 U CN 202366621U
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- reducing agent
- compressed air
- pipeline
- agent pipeline
- anemostat
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Abstract
The utility model provides an automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration. The automatic regulation-type reducing agent jetting device comprises a compressed air pipeline and a reducing agent pipeline, wherein the outer side face of the compressed air pipeline is provided with a compressed air inlet adaptor; the rear end of the reducing agent pipeline is provided with a reducing agent inlet adaptor; the compressed air pipeline is sheathed outside the reducing agent pipeline, and a closed jacket is formed; the front end part of the reducing agent pipeline is provided with a diffusing pipe of which the pipe diameter is amplified; the diffusing pipe is provided with a mixing orifice; the front end of the diffusing pipe is provided with a sprayer; the side face and the front end face of the sprayer are respectively provided with spray orifices; the axial front and the axial back of the reducing agent pipeline are controlled by an automatic regulation mechanism comprising a stepping motor, a guide slider and a fixed arm; both ends of the fixed arm are respectively connected with the reducing agent pipeline and the stepping motor; and the stepping motor is arranged on the guide slider. The automatic regulation-type reducing agent jetting device has the advantages that the structure is reasonable; the manufacturing cost is lower; the utilization rate of a reducing agent is increased; the operating cost is reduced; and the secondary pollution caused by the reason that the reducing agent is not fully reacted to be discharged is also reduced.
Description
Technical field
The utility model belongs to the flue gases purification field, specifically, is a kind of automatic adjustment type injection of reducing agent injection device of the SNCR of being applicable to denitration.
Background technology
Along with NO
XThe continuous increase of discharge capacity is by NO
XThe problem of environmental pollution paid more and more attention that causes.What at present, denitrating flue gas was comparatively commonly used is SCR method and SNCR method.SCR and SNCR method all be with NHx be reducing agent spray in the reacting furnace have " selectivity " under the effect of catalyst or catalyst-free, with NOx in flue gas reaction, generate the nitrogen (N of nontoxic pollution-free
2) and water (H
2O).In the SCR method, catalyst costs accounts for about half of SCR system initial outlay usually, and catalyst in use can because of poison, that abrasion was lost efficacy etc. was former thereby need to change, thereby existed operating cost height, shortcoming that equipment investment is big.And the SNCR method is that the reducing agent (like ammonia, urea) that contains NHx base is sprayed in the reacting furnace, is 800～1100 ℃ zone in temperature, and reducing agent resolves into NH3 rapidly, reacts with NOx in the flue gas to generate N
2Research shows: under the situation of good mixing, nitrogen reductant such as ammonia and urea and being reflected at of NOx reach balance basically in 0.3 second, and SNCR is owned by France in fast response, and the mixed effect of reducing agent and NOx and speed are done crucial influence for denitration efficiency.What existing injection of reducing agent injection device adopted usually is strength atomized spray equipment; Like spray gun and wall formula nozzle; All exist following shortcoming: the one, promptly fixing once the position that the back spray orifice is installed, can't effectively adjust with the fluctuation of flue gas operating mode, do not reach desirable denitration efficiency; The 2nd, the spray orifice projected area is fixed, and the reducing agent that sprays into is fully mixed with flue gas, and the reducing agent that causes not participating in reaction is wasted with the flue gas emptying, causes second environmental pollution.
Summary of the invention
Technical problem to be solved by this invention is, to the weak point of prior art, a kind of rational in infrastructure, automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration of being easy to make is provided, to improve the utilization rate and the denitration effect of reducing agent.
The technical scheme that the present invention is adopted for its technical problem of solution: comprise compressed air piping and reducing agent pipeline, the lateral surface of compressed air piping is provided with the compressed air air inlet tube, and the rear end of reducing agent pipeline is provided with the reducing agent entrance sleeve; Compressed air piping is placed on outside the reducing agent pipeline, and forms airtight chuck; The leading section of reducing agent pipeline is the anemostat that caliber amplifies, and on this anemostat, offers mix aperture; And the front end at above-mentioned anemostat is provided with shower nozzle, offers spray orifice on the side of shower nozzle and the front end face; The reducing agent pipeline realizes that by automatic governor motion it axially seesaws; Described automatic governor motion comprises stepper motor, guide runner and fixed arm; The two ends of fixed arm link to each other with reducing agent pipeline and stepper motor respectively; Stepper motor is loaded on the guide runner, like this through stepper motor advancing or retreat on guide runner, thereby drives fixed arm and the reducing agent pipeline seesaws.
The front end of above-mentioned compressed air piping is the closing in shape, makes compressed air sudden contraction here and gets in the reducing agent pipeline.
On the outer peripheral face of above-mentioned compressed air piping, mounting flange is housed, so that this Unit Installation.
The mix aperture of offering on the above-mentioned anemostat is one group of taper mix aperture and the square grid mix aperture of a group leader; The import and export diameter ratio of taper mix aperture is for changing 1.6 ~ 1.4:1 into; The perforate direction of rectangle grid mix aperture and the tube wall of anemostat are tangent.
The spray orifice ovalize of offering on the above-mentioned shower nozzle front end face, its line of apsides ratio is 6.5 ~ 5.5:1, spraying angle is 70 ~ 72 °; The spray orifice that the shower nozzle side is offered is the square spray orifices of two group leaders, and its spray angle is respectively 35 ~ 38 ° and 20～22 °; Thereby the reducing agent that has guaranteed three kinds of spray orifice ejections on the shower nozzle is 180 ° of fan-shaped distributions on the cross section perpendicular to flue gas flow direction.
During work, compressed air gets into from air inlet tube in the chuck that is made up of compressed air piping and reducing agent pipeline, and denitrification reducing agent is got in the reducing agent pipeline by the reducing agent entrance sleeve; Both under pressure; Flow forward in the chuck in the reducing agent pipeline, between reducing agent pipeline and compressed air piping respectively, when denitrification reducing agent flow to anemostat, the reducing agent flow velocity was owing to the expansion of caliber is slowed down; Simultaneously because the sudden contraction that compressed air hose closes up; Most of compressed air in the chuck gets into back level entering nozzle cavity from the taper mix aperture of anemostat, and remainder gets in the reducing agent pipeline from rectangle grid mix aperture tangential, produces eddy flow jointly with reducing agent; After nozzle cavity fully mixes, spray in the flue gas through the spray orifice of nozzle.
When fluctuation took place operating condition, the inner flue gas of the stove flow velocity is also corresponding to fluctuate, at this moment, and according to exhaust gas volumn, outlet NO
XThe data-signal that Monitoring Data such as concentration and the escaping of ammonia calculates; The length that reducing agent pipeline on the fixed arm is stretched in the stove through the forward and back of stepper motor on directive slide track of controlling automatic governor motion changes; The rectangle nozzle hole area of shower nozzle side direction changes, thereby the total area of nozzle hole size is changed.Because the pressure of nozzle cavity remains unchanged basically; When the reducing agent pipeline moves backward; The nozzle hole area of shower nozzle side diminishes, and it is big that the expulsion pressure of reducing agent and compressed air mixture becomes, and the reducing agent atomizing particle that from spray orifice, sprays can reach jet length far away; Otherwise when the reducing agent pipeline travelled forward, when total area of nozzle hole increased, the expulsion pressure of reducing agent and compressed air mixture diminished, and the jet length of the reducing agent atomizing particle that from spray orifice, sprays diminishes.
Beneficial effect of the present invention is: the one, and it is rational in infrastructure, does not have complicated making parts, and cost of manufacture is lower; The 2nd, through automatic governor motion, regulate effective adjustment that the degree of depth in the insertion stove of injection apparatus realizes reducing agent is sprayed into distance, fluctuation that can adaptation condition guarantees the higher denitration effect of SNCR system; The 3rd, through the adjusting of nozzle hole area; Reach the penetrability scalable of reducing agent in flue gas; Guarantee fully mixing of on the flue cross section reducing agent and flue gas; Improve the utilization rate of reducing agent, reduced operating cost, also reduced reducing agent simultaneously and discharged the secondary pollution that is caused because of fully not reacting.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of shower nozzle part of the present invention.
Among the figure: 1 is that reducing agent entrance sleeve, 2 is that automatic governor motion, 2-1 are that stepper motor, 2-2 are that guide runner, 2-3 are that fixed arm, 3 is that end socket, 4 is that compressed air air inlet tube, 5 is that mounting flange, 6 is that compressed air piping, 7 is that reducing agent pipeline, 8 is that anemostat, 8-1 are that taper mix aperture, 8-2 are that rectangle grid mix aperture, 9 is that shower nozzle, 9-1 are that oval spray orifice, 9-2 and 9-3 are the rectangle spray orifice.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
The automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration of the present invention comprises compressed air piping 6, reducing agent pipeline 7 and automatic governor motion; Mounting flange 5 is housed, so that this Unit Installation on the outer peripheral face of above-mentioned compressed air piping 6.Lateral surface at compressed air piping 6 is provided with compressed air air inlet tube 4, and the rear end of reducing agent pipeline 7 is provided with reducing agent entrance sleeve 1; Compressed air piping 6 is placed on outside the reducing agent pipeline 7; The front end of compressed air piping 6 is the closing in shape; Become tight fit with the outer surface of reducing agent pipeline 7; The rear end of compressed air piping 6 is provided with end socket 3, makes between the outer surface of inner chamber and reducing agent pipeline 7 of compressed air piping 6 and forms airtight chuck.The leading section of reducing agent pipeline 7 is the anemostat 8 that caliber amplifies, and on this anemostat 8, offers one group of taper mix aperture 8-1 and the square grid mix aperture of group leader 8-2; The import and export diameter of taper mix aperture 8-1 is than being 1.5:1; The perforate direction of rectangle grid mix aperture 8-2 and the tube wall of anemostat 8 are tangent.The front end of above-mentioned anemostat 8 is provided with shower nozzle 9, offers the square spray orifice 9-2 of two group leaders, 9-3 and oval spray orifice 9-1 on the side of shower nozzle 9 and the front end face; The line of apsides of oval spray orifice 9-1 is than being 6:1, and it sprays angle is 72 °; Spray orifice 9-2 that two group leaders are square and the spray angle of 9-3 are respectively 36 ° and 20 °; Thereby the reducing agent that has guaranteed three kinds of spray orifice ejections on the shower nozzle is 180 ° of fan-shaped distributions on the cross section perpendicular to flue gas flow direction.Described automatic governor motion 2 comprises stepper motor 2-1, guide runner 2-2 and fixed arm 2-3; The two ends of fixed arm 2-3 are fixedly linked with reducing agent pipeline 7 and stepper motor 2-1 respectively; Stepper motor 2-1 is loaded on the guide runner 2-2; Reducing agent pipeline 7 can axially seesaw under the effect of automatic governor motion 2 in realization like this, thereby regulates nozzle hole area on the shower nozzle 9, reaches the purpose of the distance of regulating the reducing agent ejection.
During work; Compressed air is taken over 4 from compress inlet air and is got in the chuck that is made up of compressed air piping 6 and reducing agent pipeline 7; Denitrification reducing agent is got in the reducing agent pipeline 7 by entrance sleeve 1, both under the effect of pressure, respectively reducing agent pipeline 7 in, mobile forward in the chuck of 6 of reducing agent pipeline 7 and compressed air pipings; When reducing agent flow to anemostat 8; Because the enlarged-diameter of anemostat 8, the reducing agent flow velocity diminishes rapidly, and the compressed air in the chuck gets in the reducing agent pipeline 7 via taper mix aperture 8-1 on the anemostat 8 and rectangle grid mix aperture 8-2; After in the inner chamber of shower nozzle 9, fully mixing, spray in the flue gas through side direction rectangle spray orifice 9-2,9-3 and oval spray orifice 9-1.The reducing agent of ejection is 180 ° of fan-shaped distributions on the cross section perpendicular to flue gas flow direction, guaranteed and fully the mixing of flue gas.
When fluctuation took place operating condition, the inner flue gas of the stove flow velocity is also corresponding to fluctuate, at this moment, and according to exhaust gas volumn, outlet NO
XThe data-signal that Monitoring Data such as concentration and the escaping of ammonia calculates; Control the forward or backward slip of stepper motor 2-1 on directive slide track 2-2 in the automatic governor motion 2; Regulate the built-in length of reducing agent pipeline 7; Cause the area of rectangle spray orifice 9-3 that change has taken place, thereby the total area of nozzle hole size that stretches in the stove is changed.Because the pressure of shower nozzle 9 inner chambers remains unchanged basically; When reducing agent pipeline 7 moves backward; The nozzle hole area of shower nozzle 9 sides diminishes, and it is big that the expulsion pressure of reducing agent and compressed air mixture becomes, and the reducing agent atomizing particle that from spray orifice, sprays can reach jet length far away; Otherwise when reducing agent pipeline 7 travelled forward, when total area of nozzle hole increased, the expulsion pressure of reducing agent and compressed air mixture diminished, and the jet length of the reducing agent atomizing particle that from spray orifice, sprays diminishes.Reach the purpose of automatic adjusting reducing agent spraying distance with this.
Claims (5)
1. be applicable to the automatic adjustment type injection of reducing agent injection device of SNCR denitration, comprise compressed air piping and reducing agent pipeline, the lateral surface of compressed air piping is provided with the compressed air air inlet tube, and the rear end of reducing agent pipeline is provided with the reducing agent entrance sleeve; Compressed air piping is placed on outside the reducing agent pipeline, and forms airtight chuck; It is characterized in that: the leading section of reducing agent pipeline is the anemostat that caliber amplifies, and on this anemostat, offers mix aperture respectively; And the front end at above-mentioned anemostat is provided with shower nozzle, offers spray orifice on the side of shower nozzle and the front end face; The reducing agent pipeline realizes that by automatic governor motion it axially seesaws, and described automatic governor motion comprises stepper motor, guide runner and fixed arm, and the two ends of fixed arm link to each other with reducing agent pipeline and stepper motor respectively, and stepper motor is loaded on the guide runner.
2. the automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration according to claim 1, it is characterized in that: the front end of above-mentioned compressed air piping is the closing in shape.
3. the automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration according to claim 1 and 2 is characterized in that: on the outer peripheral face of above-mentioned compressed air piping, mounting flange is housed.
4. the automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration according to claim 1 is characterized in that: offering mix aperture on the above-mentioned anemostat respectively is one group of taper mix aperture and the square grid mix aperture of a group leader; The import and export diameter ratio of taper mix aperture is for changing 1.6 ~ 1.4:1 into; The perforate direction of rectangle grid mix aperture and the tube wall of anemostat are tangent.
5. the automatic adjustment type injection of reducing agent injection device that is applicable to the SNCR denitration according to claim 1 is characterized in that: the spray orifice ovalize of offering on the above-mentioned shower nozzle front end face, and its line of apsides ratio is 6.5 ~ 5.5:1, spraying angle is 70 ~ 72 °; The spray orifice that the shower nozzle side is offered is the square spray orifices of two group leaders, and its spray angle is respectively 35 ~ 38 ° and 20～22 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120529953 CN202366621U (en) | 2011-12-19 | 2011-12-19 | Automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120529953 CN202366621U (en) | 2011-12-19 | 2011-12-19 | Automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration |
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| Publication Number | Publication Date |
|---|---|
| CN202366621U true CN202366621U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120529953 Withdrawn - After Issue CN202366621U (en) | 2011-12-19 | 2011-12-19 | Automatic regulation-type reducing agent jetting device suitable for selective non-catalytic reduction (SNCR) denitration |
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|---|---|
| CN (1) | CN202366621U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489137A (en) * | 2011-12-19 | 2012-06-13 | 江苏科行环境工程技术有限公司 | Self-regulation reducing agent injection device suitable for SNCR denitration |
| CN108499359A (en) * | 2018-05-15 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of whirlpool of automatic adjustment is mixed and anti-blocking ammonia-spraying grid device and its application process |
-
2011
- 2011-12-19 CN CN 201120529953 patent/CN202366621U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489137A (en) * | 2011-12-19 | 2012-06-13 | 江苏科行环境工程技术有限公司 | Self-regulation reducing agent injection device suitable for SNCR denitration |
| CN108499359A (en) * | 2018-05-15 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of whirlpool of automatic adjustment is mixed and anti-blocking ammonia-spraying grid device and its application process |
| CN108499359B (en) * | 2018-05-15 | 2023-11-03 | 华电电力科学研究院有限公司 | Automatic-adjusting vortex-mixing anti-blocking ammonia spraying grid device and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120808 Effective date of abandoning: 20130911 |
|
| RGAV | Abandon patent right to avoid regrant |