CN201244479Y - Ejection apparatus and injection grille containing the ejection apparatus - Google Patents
Ejection apparatus and injection grille containing the ejection apparatus Download PDFInfo
- Publication number
- CN201244479Y CN201244479Y CNU2008200004587U CN200820000458U CN201244479Y CN 201244479 Y CN201244479 Y CN 201244479Y CN U2008200004587 U CNU2008200004587 U CN U2008200004587U CN 200820000458 U CN200820000458 U CN 200820000458U CN 201244479 Y CN201244479 Y CN 201244479Y
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- Prior art keywords
- ammonia
- injection apparatus
- bluff body
- disturbance
- flue gas
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Abstract
The utility model relates to a structure used to improve an ammonia spray nozzle and/or an ammonia spray grating, so that flue gas and the ammonia are uniformly mixed in quite a short distance, so as to improve the denitrification efficiency. The technical proposal is as follows: the utility model provides a spraying device which comprises a pipe and a spray nozzle vertical to the pipe; the device is characterized in that the inner peripheral wall of the spray nozzle is provided with a plurality of separated disturbing pieces. The disturbing pieces are added at the outlet of the through way type ammonia spray nozzle, which enhances the disturbance to the jetted ammonia, so that the ammonia is quickly spreaded. In addition, the utility model also provides a spraying grating which comprises a plurality of spraying devices which are lined. The structure has the advantages that with the improved structure of the ammonia spray nozzle and/or the ammonia spray grating uniformly, the ammonia and the flue gas can be uniformly mixed in quite a short distance, the denitrification efficiency is improved, the leakage of the ammonia is reduced, and the expensive static mixer used in conventional flue gas denitrification devices is avoided.
Description
Technical field
The utility model relates to a kind of injection apparatus and comprises the injection grid of this injection apparatus, and this injection apparatus can be used to spray diversified chemical technology gas.Particularly, this injection apparatus can be under the jurisdiction of the technical field of environmental protection equipment, is injection apparatus on a kind of SCR (SCR) flue gas denitrification system that is used for station boiler, combined cycle system waste heat boiler, is used to spray ammonia.
Background technology
SCR (SCR) gas denitrifying technology is putative denitrating flue gas mainstream technology, is widely used in the purified treatment of all types of power plant boiler flue gases.In each key technology point of denitrating system, it is to guarantee to react completely that ammonia mixes with the even diffusion of flue gas, improves denitration rate and ammonia utilization rate, and controls the key factor that low ammonia is revealed, and its effect quality is concerning the success or failure of a whole set of denitrification apparatus.
At present ammonia-gas spraying device generally adopts ammonia-spraying grid (AIG) on the engineering, it by be arranged in together pipeline with and on aperture or straight-through nozzle forms, the spray ammonia of ammonia-spraying grid is operated and is controlled by subregion, to adapt to NO in the flue gas
xCONCENTRATION DISTRIBUTION.Ammonia in this ammonia-gas spraying device relies on flue gas purely with mixing of flue gas and the spontaneous diffusion of ammonia realizes, causes like this mixing apart from long, can not guarantee when flue length is not enough that especially ammonia and flue gas mix, thereby influence denitration efficiency.
The utility model content
Technical problem to be solved in the utility model is: improve the structure of spray ammonia nozzle and/or improvement ammonia-spraying grid, make flue gas and ammonia mix homogeneous in short distance, to improve denitration efficiency, reduce the escaping of ammonia.
On the one hand, the technical solution of the utility model is: a kind of injection apparatus is provided, comprises: pipeline; Nozzle with described pipeline perpendicular positioning; It is characterized in that the internal perisporium of described nozzle is provided with a plurality of isolated disturbance sheets.Outlet at improved like this through type spray ammonia nozzle installs the disturbance sheet additional, strengthened the disturbance of the ammonia that correlation flows out, and makes its rapid diffusion.
Preferably, the technical solution of the utility model also is included in a side relative with described nozzle and is connected bluff body disturbance member on the described pipeline, described bluff body disturbance member near the cross-sectional area of a side of described pipeline greater than at cross-sectional area away from a side of described pipeline.Like this, install bluff body disturbance member additional at the windward side of the tube bank of ammonia-spraying grid, the microcephaly of bluff body disturbance member puts down with the wind, and major part is fastened on the pipeline.Flue gas is flowed through behind the bluff body disturbance member, forms vortex street at its rear portion, ammonia in this vortex street zone and the incoming flow flue gas fully mix.
On the other hand, the technical solution of the utility model is: a kind of injection grid is provided, is formed by a plurality of above-mentioned injection apparatus arrangements.
The utility model beneficial effect is: by improving the structure of spray ammonia nozzle and/or improvement ammonia-spraying grid, reaching ammonia in short distance mixes with the even of flue gas, improve denitration efficiency, reduce the escaping of ammonia, and save the static mixer of the costliness of using in the conventional equipment for denitrifying flue gas.
Description of drawings
Followingly illustrate according to preferred embodiment of the present utility model, wherein in conjunction with example with reference to accompanying drawing:
Fig. 1 is the front elevational schematic according to the single pipe in the injection apparatus of the utility model preferred embodiment, is connected with bluff body disturbance member on it;
Fig. 2 is the schematic top plan view of injection apparatus shown in Figure 1;
Fig. 3 looks schematic diagram for the right side of injection apparatus shown in Figure 1, shows improved nozzle arrangements; And
Fig. 4 is the ammonia of flue gas and nozzle ejection of bluff body disturbance member of the utility model injection apparatus vortex street schematic diagram when mixing of flowing through.
The corresponding relation of the parts that Reference numeral and its referred among the figure is:
The specific embodiment
Below preferred embodiment be that the ammonia-gas spraying device used at gas denitrifying technology and ammonia-spraying grid are discussed and illustrated, but one of ordinary skill in the art will appreciate that, can be used to spray diversified chemical technology gas according to injection apparatus of the present utility model and injection grid, also can be used for needs and strengthen the various application scenarios of flow perturbation, and be not limited only in equipment for denitrifying flue gas, spray ammonia.
Fig. 1 shows according to injection apparatus of the present utility model, spray ammonia pipeline is wherein represented with Reference numeral 1, use the ammonia-spraying grid of forming by many such conduit arrangements alignment on actual selection catalytic reduction (SCR) reactor, several pipelines are one group, one group of pipeline is a spray ammonia controlled cell, and its flow is adjustable.Further as shown in Figure 3, spray ammonia nozzle 2 internal perisporiums are provided with a plurality of isolated disturbance sheets 21.Described disturbance sheet 21 is sheet or dentation preferably, and its shape is selected from least a in rectangle, trapezoidal, the triangle.A plurality of disturbance sheets so preferably distribute equally spacedly.The quantity of disturbance sheet 21 is not limit, preferably 2,3,4,5,6,8,10 or 12.In most preferred embodiment of the present utility model shown in Figure 3, include four rectangle disturbance sheets 21, the ammonia jet by 21 disturbances of disturbance sheet after, turbulence is strengthened, ammonia spreads rapidly, ammonia mixes further enhancing with flue gas, improved denitration efficiency.
Preferably, as illustrated in fig. 1 and 2, in a side relative with described nozzle 2, it is ammonia-spraying grid tube bank windward side, bluff body disturbance member 3 is installed, each nozzle 2 corresponding a bluff body disturbance member 3, the axis of bluff body disturbance member 3 and dead in line of nozzle 2 on described pipeline 1.Bluff body disturbance member 3 near the cross-sectional area of a side of described pipeline 1 greater than at cross-sectional area away from a side of described pipeline 1, that is to say that the microcephaly of bluff body disturbance member 3 puts down with the wind, major part is fastened on the pipeline.The shape of described bluff body disturbance member 6 can be selected arbitrarily, for example is at least a in cone-shaped, frustum shaped, the hemisphere bodily form.In the most preferred embodiment of the present utility model shown in Fig. 1 and 2, described bluff body disturbance member 3 is cone shapes, and its vertex of a cone is positioned at the side away from described pipeline, puts down with the wind, and cone angle is preferably 60 °.Described bluff body disturbance member 3 can be connected on the described pipeline 1 by connector 4, also can be integral with described pipeline 1 but those of ordinary skills also are appreciated that described bluff body disturbance member 3.Like this, the vortex street figure the when ammonia of the flue gas of the bluff body disturbance member 3 of flowing through that reference is shown in Figure 4 and nozzle 2 ejections mixes, after flue gas streamed bluff body disturbance member 3, crushing was less, formed vortex street, the NO in ammonia and the flue gas at its rear portion
xIn this zone, evenly mix rapidly.
It is noted that in addition and should select for use high-abrasive material to make according to ammonia-gas spraying device of the present utility model and ammonia-spraying grid when being used for fire coal boiler fume and handling, because contain a large amount of dust in the flue gas, dust can be denuded bluff body disturbance member 3.
Although above described injection apparatus of the present utility model and the preferred embodiment that comprises the injection grid of this injection apparatus in conjunction with the accompanying drawings, it should be understood by one skilled in the art that the utility model is not limited to the particular content of above preferred embodiment.In addition, certain functions of components of the utility model device can be realized by two or more parts, and vice versa.Generally speaking, those of ordinary skills can make various modification and improvement under the situation of the utility model scope that does not exceed the qualification of accompanying Claim book.
Claims (13)
1. injection apparatus comprises:
Pipeline;
Nozzle with described pipeline perpendicular positioning;
It is characterized in that the internal perisporium of described nozzle is provided with a plurality of isolated disturbance sheets.
2. injection apparatus according to claim 1 is characterized in that, described a plurality of disturbance sheets are sheet or dentation, and its shape is selected from least a in rectangle, trapezoidal, the triangle.
3. injection apparatus according to claim 1 is characterized in that, described a plurality of disturbance sheets distribute equally spacedly.
4. injection apparatus according to claim 3 is characterized in that, the quantity of described a plurality of disturbance sheets is 2,3,4,5,6,8,10 or 12.
5. injection apparatus according to claim 1 is characterized in that, also is included in a side relative with described nozzle and is connected bluff body disturbance member on the described pipeline.
6. injection apparatus according to claim 5 is characterized in that, described bluff body disturbance member near the cross-sectional area of a side of described pipeline greater than at cross-sectional area away from a side of described pipeline.
7. injection apparatus according to claim 6 is characterized in that, the shape of described bluff body disturbance member is at least a in cone-shaped, frustum shaped, the hemisphere bodily form.
8. injection apparatus according to claim 7 is characterized in that, described bluff body disturbance member is a cone shape, and its vertex of a cone is positioned at the side away from described pipeline.
9. injection apparatus according to claim 8 is characterized in that, the cone angle of described bluff body disturbance member is 60 °.
10. injection apparatus according to claim 5 is characterized in that, described bluff body disturbance member is connected on the described pipeline by connector.
11. injection apparatus according to claim 5 is characterized in that, described bluff body disturbance member and described pipeline are integral.
12. injection apparatus according to claim 1 is characterized in that, sprays ammonia in the described nozzle.
13. one kind is sprayed grid, is formed by a plurality of the arrangement according to each described injection apparatus among the claim 1-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200004587U CN201244479Y (en) | 2008-01-14 | 2008-01-14 | Ejection apparatus and injection grille containing the ejection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200004587U CN201244479Y (en) | 2008-01-14 | 2008-01-14 | Ejection apparatus and injection grille containing the ejection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201244479Y true CN201244479Y (en) | 2009-05-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200004587U Expired - Lifetime CN201244479Y (en) | 2008-01-14 | 2008-01-14 | Ejection apparatus and injection grille containing the ejection apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN201244479Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905120A (en) * | 2010-09-08 | 2010-12-08 | 上海电气石川岛电站环保工程有限公司 | Ammonia spray nozzle mixer for SCR denitrating device |
| CN101601965B (en) * | 2009-07-24 | 2011-12-28 | 华电环保系统工程有限公司 | Ammonia-spraying grid device for SCR-method flue gas denitrification, and SCR-method flue gas denitrification process |
| CN104524972A (en) * | 2014-12-22 | 2015-04-22 | 上海电气电站环保工程有限公司 | Design method of ammonia nozzle of SCR denitration device |
| WO2015127707A1 (en) * | 2014-02-26 | 2015-09-03 | 中国科学院过程工程研究所 | Flue ozone distributor applied in low-temperature oxidation denitrification technology and arrangement manner thereof |
| CN107081058A (en) * | 2017-05-09 | 2017-08-22 | 成都诚汇节能环保科技有限公司 | A kind of efficient hybrid system for contributing to denitration to mix |
| EP3299079A1 (en) * | 2016-09-21 | 2018-03-28 | Babcock Noell GmbH | Injection lance, gas treatment system and method for operating a gas treatment system with an injection lance |
-
2008
- 2008-01-14 CN CNU2008200004587U patent/CN201244479Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101601965B (en) * | 2009-07-24 | 2011-12-28 | 华电环保系统工程有限公司 | Ammonia-spraying grid device for SCR-method flue gas denitrification, and SCR-method flue gas denitrification process |
| CN101905120A (en) * | 2010-09-08 | 2010-12-08 | 上海电气石川岛电站环保工程有限公司 | Ammonia spray nozzle mixer for SCR denitrating device |
| WO2015127707A1 (en) * | 2014-02-26 | 2015-09-03 | 中国科学院过程工程研究所 | Flue ozone distributor applied in low-temperature oxidation denitrification technology and arrangement manner thereof |
| US10507427B2 (en) | 2014-02-26 | 2019-12-17 | Institute Of Process Engineering, Chinese Academy Of Sciences | Flue ozone distributor applied in low-temperature oxidation denitrification technology and arrangement manner thereof |
| CN104524972A (en) * | 2014-12-22 | 2015-04-22 | 上海电气电站环保工程有限公司 | Design method of ammonia nozzle of SCR denitration device |
| EP3299079A1 (en) * | 2016-09-21 | 2018-03-28 | Babcock Noell GmbH | Injection lance, gas treatment system and method for operating a gas treatment system with an injection lance |
| WO2018055049A1 (en) * | 2016-09-21 | 2018-03-29 | Babcock Noell Gmbh | Injection lance, gas treatment system and method for operating a gas treatment system with an injection lance |
| CN107081058A (en) * | 2017-05-09 | 2017-08-22 | 成都诚汇节能环保科技有限公司 | A kind of efficient hybrid system for contributing to denitration to mix |
| CN107081058B (en) * | 2017-05-09 | 2019-11-12 | 成都融科能源环境工程有限公司 | A kind of efficient hybrid system facilitating denitration mixing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090527 |