CN112870956A - SNCR high-temperature-resistant two-stage atomizing spray gun and atomizing method thereof - Google Patents
SNCR high-temperature-resistant two-stage atomizing spray gun and atomizing method thereof Download PDFInfo
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- CN112870956A CN112870956A CN202110061126.XA CN202110061126A CN112870956A CN 112870956 A CN112870956 A CN 112870956A CN 202110061126 A CN202110061126 A CN 202110061126A CN 112870956 A CN112870956 A CN 112870956A
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- premixer
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- 239000007921 spray Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims description 4
- 238000009413 insulation Methods 0.000 claims abstract description 43
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 38
- 239000002826 coolant Substances 0.000 claims abstract description 30
- 238000000889 atomisation Methods 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims description 20
- 239000012494 Quartz wool Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 4
- 238000005538 encapsulation Methods 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses an SNCR high-temperature resistant two-stage atomization spray gun and an atomization method thereof, wherein the spray gun comprises a gun body assembly and a heat insulation sleeve; the gun body assembly comprises a premixer, an inner spray pipe, an outer spray pipe, an inner nozzle and an outer nozzle; a primary compressed air inlet is formed in one axial end of the premixer, the other axial end of the premixer is connected with the inner spray pipe, and a reducing agent inlet is formed in the radial direction of the premixer; the end part of the inner spray pipe is provided with an inner nozzle; the outer spray pipe is sleeved outside the inner spray pipe, one end of the outer spray pipe is provided with an outer spray nozzle, and the radial direction of the other end of the outer spray pipe is provided with a secondary compressed air inlet; the heat insulation sleeve is arranged outside the outer spray pipe, an annular cooling medium cavity is arranged in the heat insulation sleeve, a cooling medium inlet and a cooling medium outlet are arranged at one axial end of the heat insulation sleeve, and an expansion opening is arranged at the other axial end of the heat insulation sleeve. The spray gun provided by the invention adopts secondary atomization, the atomization effect is good, the denitration efficiency is high, and the influence of a reducing agent on the quality of the ceramic tile is effectively avoided. The invention relates to the technical field of SNCR (selective non-catalytic reduction) denitration equipment.
Description
Technical Field
The invention relates to the technical field of SNCR (selective non-catalytic reduction) denitration equipment, in particular to an SNCR high-temperature-resistant two-stage atomization spray gun and an atomization method thereof.
Background
The selective non-catalytic reduction (SNCR) is a widely used NOx control technology, and the main principle is that urea solution or ammonia water is sprayed into the smoke gas at 850-1150 ℃ without the action of a catalyst to serve as a reducing agent, and the reducing agent and NOx in the smoke gas undergo an oxidation-reduction reaction at high temperature to generate N2Thereby achieving NOx removal.
The main reaction of urea as a reducing agent: 4NO +2 (NH)2)2CO+O2→4N2+2CO2+4H2O
The main reaction of ammonia as a reducing agent: 4NO +2NH3+O2→4N2+6H2O
Because the denitration efficiency of the system is influenced to a certain extent by the mixing of the reducing agent and the flue gas, the structural design of the spray gun body, the atomization characteristic and the mist field coverage rate of the spray nozzle, and the thermal protection capability and the corrosion resistance capability of the spray gun in long-time operation are the key points of the design of the SNCR spray gun.
Existing SNCR spray guns are mainly divided into two categories: one type is a single-fluid spray gun, also called a double-layer spray gun and a rear-end atomizing spray gun, the gun body is divided into an inner layer and an outer layer, the inner layer passes through a reducing agent solution, the outer layer passes through compressed air, and the inner layer and the outer layer are mixed at a nozzle to realize atomizing and spraying; the other type is a double-fluid spray gun, also called a single-tube spray gun and a front-end atomizing spray gun, namely, the spray gun body only has one layer, and after the reducing agent and compressed air enter the spray gun body, the reducing agent is mixed and atomized in the spray gun body and finally sprayed through a nozzle at the tail end of the spray gun.
Aiming at the characteristics of the flue gas of the ceramic kiln, the prior spray gun has the following problems: due to the limited height of the ceramic roller kilns, the lances are positioned 50-100cm above the tile being fired. Therefore, if the atomization effect is not ideal, the reducing agent is difficult to spread over the whole flue cross section, so that the denitration effect of the system is low, and the quality of the tile may be affected. In addition, ceramic kiln flue gas temperature is high, the particulate matter content is high, and has stronger corrosivity, and the spray gun receives the impurity in the flue gas easily to pile up and blocks up, and corrodes the deformation easily. In order to improve the denitration efficiency, the structure of the spray gun body needs to be optimized aiming at the flue gas characteristics of the ceramic kiln, and the performance and the reliability of the spray gun are improved.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides an SNCR high-temperature-resistant two-stage atomizing spray gun which adopts two-stage atomization, has good atomizing effect and high denitration efficiency, and effectively avoids the influence of a reducing agent on the quality of a ceramic tile.
The invention also aims to provide an atomization method of the SNCR high-temperature-resistant double-stage atomization spray gun.
The purpose of the invention can be realized by the following technical scheme: an SNCR high-temperature resistant double-stage atomizing spray gun comprises a gun body assembly and a heat insulation sleeve;
the gun body assembly comprises a premixer, an inner spray pipe, an outer spray pipe, an inner nozzle and an outer nozzle; a primary compressed air inlet is formed in one axial end of the premixer, the other axial end of the premixer is connected with the inner spray pipe, and a reducing agent inlet is formed in the radial direction of the premixer; the end part of the inner spray pipe is provided with an inner nozzle; the outer spray pipe is sleeved outside the inner spray pipe, one end of the outer spray pipe is provided with an outer spray nozzle, and the radial direction of the other end of the outer spray pipe is provided with a secondary compressed air inlet;
the heat insulation sleeve is arranged outside the outer spray pipe, an annular cooling medium cavity is arranged in the heat insulation sleeve, a cooling medium inlet and a cooling medium outlet are arranged at one axial end of the heat insulation sleeve, and an expansion opening is arranged at the other axial end of the heat insulation sleeve.
Further, the outside of the heat insulation sleeve is covered with a quartz wool heat insulation layer. The quartz wool heat-insulating layer can further play a role in heat insulation protection.
Further, the thickness range of the quartz wool heat insulation layer is 0.5mm-1.0 mm.
Furthermore, the cooling medium inlet and the cooling medium outlet are externally connected with a circulating cooling device. The cooling medium enters the cooling medium inlet from the circulating cooling device, circulates in the cooling medium cavity and returns to the circulating cooling device from the cooling medium outlet.
Further, the cooling medium in the circulating cooling device is water or cooling oil.
Further, the flared opening is tapered. The conical expansion opening can protect an inner nozzle and an outer nozzle at the front end of the spray gun and prevent particles in smoke from accumulating near the nozzles to cause the nozzles to be blocked.
Furthermore, the spray gun is fixed with the wall of the kiln through a fixing device, the fixing device comprises a vertical fixing plate and a horizontal fixing plate, and the vertical fixing plate is vertically connected with the horizontal fixing plate.
Furthermore, a plurality of screw holes are formed in the vertical fixing plate and the horizontal fixing plate, the vertical fixing plate is fixed with the wall of the kiln through screws, and the horizontal fixing plate is fixed with the spray gun through screws.
Furthermore, the inner spray pipe and the outer spray pipe are of an integral packaging structure.
The other purpose of the invention can be realized by the following technical scheme: an atomization method of an SNCR high-temperature resistant double-stage atomization spray gun comprises the following steps:
part of compressed air enters the premixer from the first-stage compressed air inlet, the reducing agent enters the premixer from the reducing agent inlet, the compressed air and the reducing agent solution are mixed in the premixer, and first-stage atomization is realized in the inner spray pipe;
part of the compressed air enters the outer spray pipe from the second-stage compressed air inlet and is mixed with the reducing agent solution atomized at the first stage at the inner spray nozzle, so that second-stage atomization is realized.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the spray gun provided by the invention utilizes compressed air to replace a fan as an atomization air source, and is matched with the secondary atomization of the inner spray pipe and the outer spray pipe, so that the atomization effect of the spray gun is effectively improved, the denitration efficiency of a system is improved, and the influence of a reducing agent on the quality of a ceramic tile is effectively avoided.
2. The invention adopts the three-stage cooling and heat insulation of the outer spray pipe gas cooling, the heat insulation sleeve circulating cooling and the quartz wool heat insulation layer, reduces the erosion of high temperature to the spray gun, avoids the nozzle blockage and prolongs the service life of the spray gun.
3. The spray gun solves the technical problem of NOx control in the ceramic kiln, can stably run for a long time in the high-temperature and high-dust environment of the ceramic kiln, and finally realizes the control of the NOx in the flue gas.
Drawings
FIG. 1 is a schematic structural diagram of an SNCR high temperature resistant dual-stage atomizing spray gun in an embodiment of the invention;
fig. 2 is a schematic structural diagram of the fixing of the SNCR high-temperature resistant two-stage atomizing spray gun and the kiln wall in the embodiment of the invention.
Wherein: 1: primary compressed air inlet, 2: premixer, 3: secondary compressed air inlet, 4: cooling medium outlet, 5: cooling medium inlet, 6: thermal insulation layer, 7: insulating sleeve, 8: outer nozzle, 9: inner nozzle, 10: expanded port, 11: outer nozzle, 12: inner nozzle, 13: reducing agent inlet, 14: vertical fixing plate, 15: and (5) horizontally fixing the plate.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1, the SNCR high-temperature resistant dual-stage atomizing spray gun comprises a gun body assembly and a heat insulation sleeve assembly, wherein the heat insulation sleeve assembly is installed outside the gun body assembly.
The gun body assembly includes a premixer 2, an inner lance 9, an outer lance 8, an inner nozzle 12, and an outer nozzle 11. One axial end of the premixer is provided with a primary compressed air inlet 1, the other axial end of the premixer is connected with an inner spray pipe 9, and a reducing agent inlet 13 is arranged in the radial direction of the premixer. The first-stage compressed air inlet is connected with an external compressed air source and used for introducing compressed air. The reducing agent inlet is connected with an external reducing agent solution source and is used for introducing reducing agent solution. The end of the inner spray pipe is provided with an inner nozzle 12 which is used for spraying a first-stage atomized reducing agent solution formed by mixing a reducing agent solution entering from a reducing agent inlet and compressed air entering from a first-stage compressed air inlet. The outer spray pipe is sleeved outside the inner spray pipe, an outer nozzle 11 is arranged at one end of the outer spray pipe, a second-stage compressed air inlet 3 is arranged in the radial direction of the other end of the outer spray pipe and is connected with an external compressed air source, and compressed air is introduced into the outer spray pipe. Compressed air introduced from the secondary compressed air inlet is mixed with the primary atomized reducing agent solution at the inner nozzle to realize secondary atomization. The inner spray pipe and the outer spray pipe can adopt an integral packaging structure.
The thermowell assembly comprises a thermowell 7 and an insulation layer 6. The heat insulation sleeve is arranged outside the outer spray pipe, an annular cooling medium cavity is arranged in the heat insulation sleeve, a cooling medium inlet 5 and a cooling medium outlet 4 are arranged at one axial end of the heat insulation sleeve, and an expansion opening 10 is arranged at the other axial end of the heat insulation sleeve. The cooling medium inlet and the cooling medium outlet are respectively connected with an external circulating cooling device, and the cooling medium used by the circulating cooling device can be water or cooling oil. The cooling medium circulates in the cooling medium cavity, so that the gun body assembly can be effectively cooled. The heat insulation sleeve is covered with a heat insulation layer, the heat insulation layer is made of quartz wool, and the thickness range of the quartz wool heat insulation layer is 0.5mm-1.0 mm. The quartz wool heat-insulating layer can effectively play a role in heat insulation and protection, and erosion of high temperature to the spray gun is reduced. Compressed air introduced into the outer spray pipe not only plays a role of secondary atomization, but also can cool the inner spray pipe. The compressed air cooling in the outer spray pipe is adopted, and the three-stage cooling and heat insulation mode is combined with the circulating cooling in the heat insulation sleeve and the heat insulation of the quartz wool heat insulation layer, so that the erosion of high temperature to the spray gun can be effectively reduced, the nozzle blockage can be avoided, and the service life of the spray gun is prolonged. The expansion opening is conical, the inner nozzle and the outer nozzle are arranged in the conical expansion opening, the inner nozzle and the outer nozzle at the front end of the gun body assembly can be protected, and meanwhile, the blockage of the nozzles caused by the accumulation of particles in smoke nearby the nozzles is prevented.
As shown in fig. 2, the SNCR high-temperature resistant two-stage atomizing spray gun needs to be fixed on a kiln wall (not shown) when in use. In this embodiment, the fixing of the spray gun and the kiln wall is realized by a fixing device, and the fixing device includes a vertical fixing plate 14 and a horizontal fixing plate 15, and the vertical fixing plate is vertically connected with the horizontal fixing plate. The vertical fixing plate and the horizontal fixing plate are provided with a plurality of screw holes, the vertical fixing plate is fixed with the wall of the kiln through screws, and the horizontal fixing plate is fixed with the spray gun through screws. The spray gun can be stably installed on the wall body of the kiln through the upper fixing device and the lower fixing device, meanwhile, when the depth of the spray gun penetrating into the kiln needs to be adjusted, the screws on the horizontal fixing plate can be unscrewed, and after the horizontal position of the spray gun is adjusted, the proper screw holes are selected again to fix the screws. When the spray gun is not used, the gun body assembly can be taken out from the heat insulation sleeve assembly, and the heat insulation sleeve assembly can be embedded in the wall of the kiln all the time, so that the spray gun is convenient to use next time.
The working principle of the SNCR high-temperature resistant two-stage atomizing spray gun of the invention is as follows: after the spray gun is fixed with the wall of the kiln, compressed air enters the spray gun and then is divided into two paths, the first path of compressed air is introduced into the premixer from the primary compressed air inlet and is mixed with the reducing agent solution introduced from the reducing agent inlet for primary atomization, and then primary atomization is realized in the inner spray pipe and is sprayed out from the inner spray nozzle. The other path of compressed air is introduced into the outer spray pipe from the second-stage compressed air inlet, and is contacted with the reducing agent solution after the first-stage atomization of the inner spray pipe at the inner spray nozzle, so that the second-stage atomization is realized, the reducing agent solution is more refined and uniform, and finally is sprayed into the hearth in a conical shape through the outer spray nozzle.
In the atomizing in-process of realization second grade, carry out air cooling from the compressed air that second grade compressed air inlet let in to the internal spray tube, the circulative cooling medium in the heat insulating sleeve carries out circulative cooling to the rifle body subassembly, and the cotton insulating layer of quartz insulates against heat to the spray gun, effectively reduces the erosion of high temperature to the spray gun, and tertiary cooling, thermal-insulated while guarantee in the spray tube reductant solution can not lead to reductant solution to appear and block up interior nozzle because of being heated.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An SNCR high-temperature resistant two-stage atomizing spray gun is characterized by comprising a gun body assembly and a heat insulation sleeve;
the gun body assembly comprises a premixer, an inner spray pipe, an outer spray pipe, an inner nozzle and an outer nozzle; a primary compressed air inlet is formed in one axial end of the premixer, the other axial end of the premixer is connected with the inner spray pipe, and a reducing agent inlet is formed in the radial direction of the premixer; the end part of the inner spray pipe is provided with an inner nozzle; the outer spray pipe is sleeved outside the inner spray pipe, one end of the outer spray pipe is provided with an outer spray nozzle, and the radial direction of the other end of the outer spray pipe is provided with a secondary compressed air inlet;
the heat insulation sleeve is arranged outside the outer spray pipe, an annular cooling medium cavity is arranged in the heat insulation sleeve, a cooling medium inlet and a cooling medium outlet are arranged at one axial end of the heat insulation sleeve, and an expansion opening is arranged at the other axial end of the heat insulation sleeve.
2. The SNCR high temperature resistant dual stage atomizing spray gun of claim 1, wherein said heat insulating sleeve is externally covered with a layer of quartz wool insulation.
3. The SNCR high temperature resistant two-stage atomizing spray gun according to claim 2, wherein the thickness of the quartz wool heat insulation layer ranges from 0.5mm to 1.0 mm.
4. The SNCR high temperature resistant dual-stage atomizing spray gun according to claim 1, wherein the cooling medium inlet and the cooling medium outlet are externally connected with a circulating cooling device.
5. The SNCR high temperature resistant dual stage atomizing spray gun according to claim 4, wherein the cooling medium in the circulating cooling device is water or cooling oil.
6. The SNCR high temperature resistant dual stage atomizing spray gun of claim 1, wherein said flared mouth is tapered.
7. The SNCR high-temperature-resistant two-stage atomizing spray gun according to claim 1, wherein the spray gun is fixed to a kiln wall through a fixing device, the fixing device comprises a vertical fixing plate and a horizontal fixing plate, and the vertical fixing plate is vertically connected with the horizontal fixing plate.
8. The SNCR high-temperature resistant two-stage atomizing spray gun according to claim 7, wherein a plurality of screw holes are formed in the vertical fixing plate and the horizontal fixing plate, the vertical fixing plate is fixed to a kiln wall through screws, and the horizontal fixing plate is fixed to the spray gun through screws.
9. The SNCR high temperature resistant dual-stage atomizing spray gun according to claim 1, wherein the inner spray tube and the outer spray tube are of an integral encapsulation structure.
10. A method of effecting atomisation using a SNCR high temperature tolerant dual stage atomising spray gun as claimed in any one of claims 1 to 9, comprising the steps of:
part of compressed air enters the premixer from the first-stage compressed air inlet, the reducing agent enters the premixer from the reducing agent inlet, the compressed air and the reducing agent solution are mixed in the premixer, and first-stage atomization is realized in the inner spray pipe;
part of the compressed air enters the outer spray pipe from the second-stage compressed air inlet and is mixed with the reducing agent solution atomized at the first stage at the inner spray nozzle, so that second-stage atomization is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110061126.XA CN112870956A (en) | 2021-01-18 | 2021-01-18 | SNCR high-temperature-resistant two-stage atomizing spray gun and atomizing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110061126.XA CN112870956A (en) | 2021-01-18 | 2021-01-18 | SNCR high-temperature-resistant two-stage atomizing spray gun and atomizing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL339606A1 (en) * | 2000-04-12 | 2001-10-22 | Przemyslowy Inst Elektroniki | Method fo determining the content of glossy carbon carriers and pyrolysis products formed from carbon-producing additives, in particular those contained in foundry sandmixes and apparatus therefor |
| CN202921159U (en) * | 2012-09-10 | 2013-05-08 | 杨建华 | Double-atomization spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN204412055U (en) * | 2014-05-16 | 2015-06-24 | 湘潭大学 | A kind of dore furnace flue gas SNCR denitration device reducing agent high-efficiency atomizer |
| CN108116011A (en) * | 2017-12-08 | 2018-06-05 | 航天特种材料及工艺技术研究所 | The sandwich thermally protective materials of a kind of surface Jing Guo protective treatment and preparation method thereof |
| CN208260527U (en) * | 2018-05-02 | 2018-12-21 | 太原核清环境工程设计有限公司 | One kind being used for SNCR denitration Double layer high efficient atomizing lance |
| CN210206430U (en) * | 2019-05-31 | 2020-03-31 | 黄忠 | SNCR spray gun protection device |
-
2021
- 2021-01-18 CN CN202110061126.XA patent/CN112870956A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL339606A1 (en) * | 2000-04-12 | 2001-10-22 | Przemyslowy Inst Elektroniki | Method fo determining the content of glossy carbon carriers and pyrolysis products formed from carbon-producing additives, in particular those contained in foundry sandmixes and apparatus therefor |
| CN202921159U (en) * | 2012-09-10 | 2013-05-08 | 杨建华 | Double-atomization spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN204412055U (en) * | 2014-05-16 | 2015-06-24 | 湘潭大学 | A kind of dore furnace flue gas SNCR denitration device reducing agent high-efficiency atomizer |
| CN108116011A (en) * | 2017-12-08 | 2018-06-05 | 航天特种材料及工艺技术研究所 | The sandwich thermally protective materials of a kind of surface Jing Guo protective treatment and preparation method thereof |
| CN208260527U (en) * | 2018-05-02 | 2018-12-21 | 太原核清环境工程设计有限公司 | One kind being used for SNCR denitration Double layer high efficient atomizing lance |
| CN210206430U (en) * | 2019-05-31 | 2020-03-31 | 黄忠 | SNCR spray gun protection device |
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Application publication date: 20210601 |