CN203484049U - Flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun - Google Patents
Flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun Download PDFInfo
- Publication number
- CN203484049U CN203484049U CN201320622596.XU CN201320622596U CN203484049U CN 203484049 U CN203484049 U CN 203484049U CN 201320622596 U CN201320622596 U CN 201320622596U CN 203484049 U CN203484049 U CN 203484049U
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- China
- Prior art keywords
- spray gun
- reducing agent
- lance tube
- pipe
- spout
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007921 spray Substances 0.000 title claims abstract description 127
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 title claims abstract description 18
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract 2
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 238000009434 installation Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun, which comprises a spray gun handle, wherein the spray gun handle is fixedly connected with one end of a spray gun pipe; a spray gun inner tube is arranged in the spray gun pipe; the other end of the spray gun pipe is provided with a spout; the spray gun pipe is provided with a spray gun casing close to the periphery of the spout; the spray gun casing is detachably connected with the spray gun pipe through a casing fixing device; the spray gun casing is fixedly connected with the furnace wall of a combustion furnace; the end parts, which are enclosed by the spray gun casing, of the spray gun casing and the spray gun pipe extend into the combustion chamber of the combustion furnace; the spray gun inner pipe is reduced in diameter close to the spout, and the top end of the spray inner pipe is semispherical. A slender semispherical atomization surface is formed at the front end of the spray gun inner pipe, so that the atomizing effect of a reducing agent is enhanced. A nozzle is made of a heat-resistant and wear-resistant material, and long service life is ensured under the conditions of high temperature and high dust content, so that the denitrification effect is ensured. The spray gun is fixed by adopting a spray gun fixing device, so that the spray gun is convenient to disassemble and assemble. Meanwhile, the position of the spout is adjusted, so that good atomization of the reducing agent is facilitated.
Description
Technical field
The utility model relates to a kind of flue gas SNCR denitrification reducing agent spray gun, is a kind of environmental protecting device, is a kind of device purifying for combustion of fossil fuel.
Background technology
Nitrogen oxide (NOx) is that fossil fuel and air produce when high-temp combustion.NOXShi power plant is to one of greatest contamination source of environment.A kind of technical equipment as power plant's environmental protection drops into, and denitration engineering can be subdued nitrogen compound, directly reduces the pollution of nitrogen oxide to environment.SNCR(SNCR) method of denitration is a kind of being widely used and respond well denitration technology.By relevant device, assembly, the reducing agent after dilution is sprayed into burner hearth after uniform distribution, atomization, thereby reach the object of denitration.There is the advantages such as equipment is few, construction and installation simple, be convenient to control, respond well.Spray gun is the critical component of SNCR denitration.Reducing agent after dilution is ejected into the correct position of burner hearth after by spray gun atomization, guarantees that reducing agent fully contacts with the NOx in flue gas.Because spray gun is in flue-gas temperature injection reduction agent under the condition of 850 ~ 1250 ℃ of temperature, and in flue gas environment, there is a large amount of dust to wash away.Reduce the service life of spray gun, affected SCNR denitration effect.
Traditional SNCR spray gun, the atomizing effect of spray gun is bad.Reductant solution in burner hearth, cannot make the abundant atomization of reducing agent through nozzle ejection, cannot reach the well-mixed object of reducing agent drop and flue gas.The speed portion that reducing agent drop goes out at jet expansion evenly causes having drop to stay, and causes reduction not make full use of, and may make furnace wall that corrosion phenomenon occurs when serious.Spray gun material does not possess good high temperature resistant, wearability, and spray gun front end serious wear in the short time reduces reducing agent atomizing effect.Every spray gun must have certain emitted dose, and the reductant concentration that causes being injected in burner hearth is lower, has increased that to spray in burner hearth most of be water.Can have a negative impact to the thermal efficiency of boiler.
Summary of the invention
In order to overcome the problem of prior art, the utility model proposes a kind of flue gas SNCR denitrification reducing agent spray gun.Described SNCR spray gun atomizing effect is good, and injection penetration of droplets ability is strong, easy installation and removal, and can be high temperature resistant, wear-resisting.
The purpose of this utility model is achieved in that a kind of flue gas SNCR denitrification reducing agent spray gun, comprise: spray gun handle, described spray gun handle is fixedly connected with one end of lance tube, in described lance tube, be provided with spray gun inner tube, the centre of gyration axis of described spray gun inner tube overlaps with the centre of gyration axis of lance tube, described lance tube is communicated with compressed air air supply pipe, described spray gun inner tube is communicated with reducing agent feed pipe, it is characterized in that, the other end of described lance tube is spout, lance tube approaches the outer spray gun sleeve pipe that is arranged with of spout, described spray gun sleeve pipe removably connects by sleeve fixing device and lance tube, described spray gun sleeve pipe is fixedly connected with the furnace wall of combustion furnace, described spray gun sleeve pipe and lance tube are gone along with sb. to guard him end by spray gun sleeve pipe and are divided in the combustion chamber of stretching into combustion furnace, described spray gun inner tube is approaching described nozzle reduced, and top is hemispherical.
The beneficial effect that the utility model produces is: what compared with prior art the utility model adopted forms elongated hemispherical atomization face at spray gun inner tube front end, the atomizing effect of reducing agent is better, forms the drop of small particle diameter through compressed air after mixing in spray gun.Reducing agent liquid after the atomization being sprayed by spray gun has certain jet velocity, guarantee when spraying with flue gas flow rate vertical direction, have good penetration capacity, assurance reducing agent fully contacts with nitrogen oxides in effluent, has effectively prevented the generation of reducing agent short circuit.Spray gun high temperature resistant, anti-wear performance is good.Nozzle adopts heat-resisting, high-abrasive material, and applies wear-resistant ceramic material at nozzle and spray gun sleeve pipe, can under the condition of high temperature, high dirt, guarantee long service life, thereby guarantee denitration effect.Owing to adopting gun fixture spray gun easy accessibility, as stop up, wear and tear, only change nozzle, need not change whole spray gun, maintenance cost is low.Utilize gun fixture to adjust the position of spout simultaneously, promote good reducing agent atomization, further improve denitration efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the structural representation of spray gun described in embodiment mono-of the present utility model;
Fig. 2 is the structural representation of sleeve fixing device described in embodiment tetra-of the present utility model, is the enlarged drawing that in Fig. 1, A is ordered.
The specific embodiment
Embodiment mono-:
The present embodiment is a kind of flue gas SNCR denitrification reducing agent spray gun, as shown in Figure 1.The present embodiment comprises: spray gun handle 1, described spray gun handle is fixedly connected with one end of lance tube 2, in described lance tube, be provided with spray gun inner tube 4, the centre of gyration axis of described spray gun inner tube overlaps with the centre of gyration axis of lance tube, described lance tube is communicated with compressed air air supply pipe 8, described spray gun inner tube is communicated with reducing agent feed pipe 7, the other end of described lance tube is spout 201, lance tube approaches the outer spray gun sleeve pipe 5 that is arranged with of spout, described spray gun sleeve pipe removably connects by sleeve fixing device 3 and lance tube, described spray gun sleeve pipe is fixedly connected with the furnace wall 6 of combustion furnace, described spray gun sleeve pipe and lance tube are gone along with sb. to guard him end by spray gun sleeve pipe and are divided in the combustion chamber of stretching into combustion furnace, described spray gun inner tube is approaching described nozzle 402 reduced, and top 401 is hemispherical.
Spray gun handle is the connector of lance tube, spray gun inner tube and air feed feed pipe.By the interface channel on spray gun handle and screwed connector thereof, compressed air and reducing agent can be sent into respectively in lance tube and spray gun inner tube, can not obscure and can not leak.Spray gun handle profile can be cylindrical or the cylinder of other regular polygons.Columniform end face sealing, another end face inserts and fixing lance tube.The other end of lance tube is spout.In the middle of lance tube, fixedly put into spray gun inner tube, spray gun inner tube is connected with compressed air air supply pipe with the space between lance tube, passage in the middle of spray gun inner tube is connected with reducing agent feed pipe, reducing agent from spray gun inner tube sprays around compressed-air actuated effect issue fog.
The present embodiment is in order to be the abundant atomization of reducing agent, the position that approaches spout in spray gun inner tube dwindles diameter of inner pipe, because spray gun diameter of inner pipe dwindles suddenly, space between spray gun inner tube and lance tube increases suddenly, compressed air is reduced suddenly at the flow velocity of this position, produce turbulent flow, disturb fully near flowing of the reducing agent of spout.And the exit of reducing agent is shaped as hemispherical, again disturbed compressed-air actuated flowing, produced more turbulent flow, make compressed air mix fully with reducing agent and make the abundant atomization of reducing agent drop, produce better atomizing effect.Reducing agent fully after atomization, is ejected in burner hearth, and reducing agent is evenly mixed with flue gas fully, produces better denitration effect.
Because the spout of spray gun is in burner hearth, therefore to bear certain high temperature, simultaneously due to compressed-air actuated effect, the spout of conventional lance is Rapid Damage usually.For reducing the damaged condition of spout, the present embodiment is provided with again spray gun sleeve pipe in the periphery of lance tube.Spray gun sleeve pipe is set and can solves a plurality of problems.First be the installation question of spray gun.Spray gun sleeve pipe can be fixed on furnace wall, and spray gun can use Quick Connect Kit to be combined with spray gun sleeve pipe, makes spray gun dismounting fast, and this maintenance for spray gun is very favourable.In Fast Installation, the position that can also make spray gun and spray gun sleeve pipe install changes, and is actually equivalent to adjust the position relationship of spout between exporting with spray gun sleeve pipe.This position relationship is very important, and both trams can promote the abundant atomization of reducing agent drop, and the reducing agent drop of the small particle diameter after atomization fully mixes with flue gas, guarantees denitration efficiency.Due to the combustible substance of flue gas, the variation of pressure, temperature, the distance between spout and the outlet of spray gun sleeve pipe will have certain adjusting range, and the present embodiment utilizes sleeve fixing device to solve the problem of Fast Installation, has also solved the problem of adjusting spout.
The part of going deep into burner hearth due to spray gun will stand high temperature, and simultaneously owing to containing a large amount of dust in flue gas, these dust can produce very large abrasive action with the rapid flow of flue gas to the surface of material.Therefore, lance tube described in the present embodiment, spray gun inner tube and spray gun sleeve pipe use high temperature resistant, wear-resisting material manufacture, implementation integral sealing is installed, and apply wear-resistant ceramic material at the front end outer surface that lance tube, spray gun inner tube, spray gun sleeve pipe go deep into burner hearth, guarantee the service life of whole spray gun under high temperature, high dirt condition.
Sleeve fixing device described in the present embodiment, can have multiple fixed solution, as adopted, is threaded, and jackscrew is fixed.Scheme is to adopt dismounting mode efficiently preferably.Can use the oval buckle with handle, utilizing ellipse is the variation of diameter in rotation, latched position.
Embodiment bis-:
The present embodiment is the improvement of embodiment mono-, is that embodiment mono-is about the refinement of lance tube.The part cover that lance tube described in the present embodiment stretches into combustion chamber has wear sleeve heat-resisting, that antifriction metal (AFM) is made.
The situation that lance tube is worn and torn by exhaust gas dust is under normal conditions the most serious; the present embodiment is for addressing this problem; at lance tube, go deep into the part of burner hearth (combustion chamber), put a protection tube on the periphery of lance tube again, this protection tube is used the material different from lance tube.Because high temperature resistant and anti abrasive material is conventionally more expensive, therefore, take the mode of this protection tube, can reduce the manufacturing cost of spray gun.
Embodiment tri-:
The present embodiment is the improvement of embodiment mono-, is that embodiment mono-is about the refinement of lance tube.Lance tube described in the present embodiment stretches into heat-resisting, the antifriction metal (AFM) coating of part spraying of combustion chamber.
The performance of damaging for improving the heat resistant and wear resistant of lance tube, the present embodiment gos deep into heat-resisting, the antifriction metal (AFM) layer of part spraying of burner hearth (combustion chamber) at lance tube.This heat-resisting, antifriction metal (AFM) coating can be: (please enumerate the title of one or two kind of coating)
Embodiment tetra-:
The present embodiment is implemented the improvement of above-described embodiment, is that above-described embodiment is about the refinement of sleeve fixing device.Sleeve fixing device described in the present embodiment comprises: be enclosed within the collar 304 being fixedly connected with spray gun sleeve pipe on lance tube, the described collar is provided with a plurality of oval buckles 302 with handle 303, described a plurality of oval buckle is distributed on the peripheral surrounding of the collar, be arranged side by side with the collar baffle ring 301 being enclosed within on lance tube, described baffle ring is provided with lock-screw 305.
The present embodiment fixes on oval-shaped snap close on spray gun sleeve pipe by hinges fixing, on snap close with handle.When spray gun is installed, by moving handle, oval-shaped snap close is rotated, utilize oval diameter when rotated to change, make to latch in spray gun sleeve surface and produce compared with large frictional resistance and latched position.During dismounting, press rightabout turning handle, unclamp snap close, spray gun can be extracted out easily from spray gun sleeve pipe.
In order to determine the installation site of spray gun, a baffle ring is installed on lance tube, utilize the lock-screw on baffle ring that baffle ring is fixed on spray gun sleeve pipe.Like this, because the position of baffle ring is fixed, while spray gun being installed, just can get back to easily the position of installing last time at every turn, too many deviation can not occur.Utilize the change in location of baffle ring simultaneously, can adjust the position of spout and the outlet of spray gun sleeve pipe, to adapt to the situation of different flame combustions, improve reducing agent atomization, improve denitration efficiency.
Finally it should be noted that, below only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred arrangement scheme, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model (such as the profile of lance tube and the connected mode between each pipe etc.), and not depart from the spirit and scope of technical solutions of the utility model.
Claims (4)
1. a flue gas SNCR denitrification reducing agent spray gun, comprise: spray gun handle, described spray gun handle is fixedly connected with one end of lance tube, in described lance tube, be provided with spray gun inner tube, the centre of gyration axis of described spray gun inner tube overlaps with the centre of gyration axis of lance tube, described lance tube is communicated with compressed air air supply pipe, described spray gun inner tube is communicated with reducing agent feed pipe, it is characterized in that, the other end of described lance tube is spout, lance tube approaches the outer spray gun sleeve pipe that is arranged with of spout, described spray gun sleeve pipe removably connects by sleeve fixing device and lance tube, described spray gun sleeve pipe is fixedly connected with the furnace wall of combustion furnace, described spray gun sleeve pipe and lance tube are gone along with sb. to guard him end by spray gun sleeve pipe and are divided in the combustion chamber of stretching into combustion furnace, described spray gun inner tube is approaching described nozzle reduced, and top is hemispherical.
2. reducing agent spray gun according to claim 1, is characterized in that, the part cover that described lance tube stretches into combustion chamber has wear sleeve heat-resisting, that antifriction metal (AFM) is made.
3. reducing agent spray gun according to claim 1, is characterized in that, described lance tube stretches into heat-resisting, the antifriction metal (AFM) coating of part spraying of combustion chamber.
4. according to the reducing agent spray gun one of claim 1-3 Suo Shu, it is characterized in that, described sleeve fixing device comprises: be enclosed within the collar being fixedly connected with spray gun sleeve pipe on lance tube, the described collar is provided with a plurality of oval buckles with handle, described a plurality of oval buckle is distributed on the peripheral surrounding of the collar, be arranged side by side with the collar baffle ring being enclosed within on lance tube, described baffle ring is provided with lock-screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622596.XU CN203484049U (en) | 2013-10-10 | 2013-10-10 | Flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622596.XU CN203484049U (en) | 2013-10-10 | 2013-10-10 | Flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun |
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| Publication Number | Publication Date |
|---|---|
| CN203484049U true CN203484049U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320622596.XU Expired - Lifetime CN203484049U (en) | 2013-10-10 | 2013-10-10 | Flue gas SNCR (Selective Non-catalytic Reduction) denitrification reducing agent spray gun |
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| Country | Link |
|---|---|
| CN (1) | CN203484049U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353567A (en) * | 2014-11-13 | 2015-02-18 | 河南海力特机电制造有限公司 | High pressure fine water mist spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN114985135A (en) * | 2022-04-29 | 2022-09-02 | 重庆三峰百果园环保发电有限公司 | Denitration spray gun |
-
2013
- 2013-10-10 CN CN201320622596.XU patent/CN203484049U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353567A (en) * | 2014-11-13 | 2015-02-18 | 河南海力特机电制造有限公司 | High pressure fine water mist spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN114985135A (en) * | 2022-04-29 | 2022-09-02 | 重庆三峰百果园环保发电有限公司 | Denitration spray gun |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |
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| CX01 | Expiry of patent term |