CN203044243U - Smoke denitration ammonia spraying device - Google Patents
Smoke denitration ammonia spraying device Download PDFInfo
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- CN203044243U CN203044243U CN 201220697797 CN201220697797U CN203044243U CN 203044243 U CN203044243 U CN 203044243U CN 201220697797 CN201220697797 CN 201220697797 CN 201220697797 U CN201220697797 U CN 201220697797U CN 203044243 U CN203044243 U CN 203044243U
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Abstract
The utility model provides a smoke denitration ammonia spraying device and belongs to the technical field of smoke denitration systems. The smoke denitration ammonia spraying device comprises a set of main pipes and is characterized in that the main pipes are arranged in a layered mode along the direction of smoke. The main pipes in each arrangement layer are arranged in equal distance and in parallel and perpendicular to the direction of the smoke. Two sides of each main pipe are respectively provided with a set of branch pipes which are perpendicularly connected with the each pipe and arranged in parallel. A step-shaped structure is formed by the branch pipes in the same perpendicular plane parallel to the direction of the smoke. Conic spraying holes are formed in the front branch pipes and the rear branch pipes with the connected main pipe serving as a centrally symmetrical axis, wherein the front branch pipes and the rear branch pipes are corresponding to each other. The smoke denitration ammonia spraying device can be widely used in the various smoke denitration systems, reducing agent spraying flow can be adjusted in time according to smoke flow information which is fed back in real time, an optimized matching and mixing effect between a reducing agent and smoke fluid in different spraying zones can be maintained in a dynamic mode, and the smoke denitration ammonia spraying device has the advantages of being easy to adjust, strong in load adaptability, even in ammonia spraying, good in mixing effect, simple in structure, convenient to install and maintain, low in manufacturing and operating cost, capable of guaranteeing efficient and stable operation of the smoke denitration systems and the like.
Description
Technical field
The utility model belongs to the flue gas denitrification system technical field, is specifically related to a kind of a kind of denitrating flue gas ammonia-gas spraying device that is applicable to the selective-catalytic-reduction denitrified technology of flue gas.
Background technology
At present, the most widely used gas denitrifying technology of power plant is SCR technology (SCR) both at home and abroad, its cardinal principle is: under the effect of catalyst, reducing agent (generally using ammonia and air gas mixture) is fully mixed with nitrogen oxide in the boiler tail flue gas and react, generate the nitrogen G﹠W, reach the denitration purpose.The reducing agent that uses in this technology needs evenly to spray into flue by corresponding ammonia-gas spraying device to be mixed with flue gas, the even mixability of reducing agent and flue gas will directly have influence on operational efficiency and the operational effect of denitrating system, adverse effects such as denitration efficiency is low, the escaping of ammonia rate height, the increase of air preheater running resistance can appear when mixed effect is not good, the serious safe and stable operation that also can influence the boiler main frame.
Usually the ammonia-gas spraying device that adopts is nozzle-type substantially in the prior art, and generally all be arranged in the same plane, find many deficiencies in actual applications: at first, the effect of spray ammonia depends primarily on the nozzle quantity in the unit are, when denitration efficiency is had relatively high expectations, need a large amount of nozzle of configuration, complex structure, make and the maintenance cost height, lack economy; Secondly, when the layout quantity of nozzle is restricted, as satisfying higher mixing requirement, often the Forced Mixing device need be installed behind ammonia-gas spraying device, this structure can increase the straight section length space of flue, is subjected to the restriction of site condition; The 3rd, be subjected to the large economy ambient influnence, power plant need often carry out peaking generation, make the boiler variable load operation increased, traditional nozzle-type ammonia-gas spraying device sprays the ammonia poor effect under running on the lower load, therefore, because device lacks adjustability, and is not strong to the applicability of varying load condition.
The utility model content
The utility model aims to provide a kind of adjustable a kind of denitrating flue gas ammonia-gas spraying device technical scheme of taper hole formula layering that the ammonia district may be partitioned into some independent zones of control of spraying, to overcome problems of the prior art.
Described a kind of denitrating flue gas ammonia-gas spraying device, comprise one group of person in charge, it is characterized in that being responsible for along flue gas direction layered arrangement, each arranges layer interior person in charge's equidistant parallel setting and vertical with the flue gas direction respectively, each is responsible for the both sides correspondence one group of perpendicular arm that joins, is arranged in parallel is set, arm in the same vertical plane parallel with the flue gas direction constitutes step structure, is symmetrical arranged the conical jet hole on the corresponding arm in front and back centered by the person in charge of joining with it.
Described a kind of denitrating flue gas ammonia-gas spraying device, it is characterized in that described person in charge's tail end connects respectively arranges blind plate, each arrival end of being responsible for is connected cooperation by adpting flange respectively with tube connector, tube connector cooperates with the walling of flue cross-under, and its arrival end connection arranges control valve.
Described a kind of denitrating flue gas ammonia-gas spraying device is characterized in that described with identical to arrangement pitches L with the front and back in conical jet hole to arrangement pitches H about the arm in one deck.
Described a kind of denitrating flue gas ammonia-gas spraying device is characterized in that described conical jet hole is equipped with the taper hole structure of lee face, employing cylindrical portion and conical section combination at arm.
Described a kind of denitrating flue gas ammonia-gas spraying device is characterized in that described conical jet hole is equipped with the lee face at arm, and is symmetrical arranged two conical jet holes formation injection hole groups on same periphery centered by perpendicular bisector.
Described a kind of denitrating flue gas ammonia-gas spraying device is characterized in that the described person in charge's the spacing that layer is set is 200～400mm.
Described a kind of denitrating flue gas ammonia-gas spraying device, the circulation area that it is characterized in that the described person in charge is preferably 1.6～2.0 times for 1.5～3.0 times of the circulation area sum of the arm that connects on this person in charge; The circulation area of described arm is 2.0～5.0 times of conical jet hole arrival end circulation area sum set on this arm, is preferably 2.5～4.0 times.
Described a kind of denitrating flue gas ammonia-gas spraying device, more than it is characterized in that the described person in charge is two-layer and two-layer along flue gas direction layout, the person in charge of equidistant parallel setting is more than two and two in each layer, and the corresponding arm that arranges was more than two groups and two groups before and after each was responsible for and goes up.
Described a kind of denitrating flue gas ammonia-gas spraying device, the taper hole structure that it is characterized in that described conical jet hole employing cylindrical portion and conical section combination, the larynx footpath d of cylindrical portion correspondence is 4～10mm, preferred 6～8mm, the injection angle of flare α of conical section correspondence is 15 °～45 °, preferred 20 °～35 °, and the center line angle β on the same periphery between two conical jet holes is 60 ° ~ 150 °, preferred 80 °～120 °.
Described a kind of denitrating flue gas ammonia-gas spraying device is characterized in that injection hole groups set on each arm is more than two groups and two groups.
Above-mentioned a kind of denitrating flue gas ammonia-gas spraying device, novel, rational in infrastructure, can be widely used in large thermal power plant, the cement plant, the SCR flue gas denitrification system of industry kilns such as steel plant, can in time regulate the interior injection of reducing agent amount of jet of different inlet zones according to the flow of flue gas change in information of feeding back in real time, dynamically keep optimum Match and mixed effect between the interior reducing agent of different inlet zones and flue gas fluid, have and be easy to regulate, load adaptability is strong, spray ammonia is even, good mixing effect and simple in structure, convenient for installation and maintenance, characteristics such as build and operating cost is low, provide safeguard for the efficient stable of SCR denitrification apparatus moves.
Description of drawings
Fig. 1 is the utility model syndeton schematic diagram;
Fig. 2 be among Fig. 1 A-A to the sectional structure schematic diagram;
Fig. 3 be among Fig. 1 B-B to the sectional structure schematic diagram;
Fig. 4 is C-C cross section structure schematic diagram among Fig. 1;
Fig. 5 arranges that for using three layers of the utility model fashionable dress deposits the reductant concentration distribution map at 1 meter of trip;
Fig. 6 is for being arranged that by the utility model individual layer fashionable dress deposits the reductant concentration distribution map at 1 meter of trip;
Fig. 7 deposits 1 meter reductant concentration distribution map of trip for using conventional spout formula ammonia-gas spraying device fashionable dress;
Among the figure: 1-control valve, 2-tube connector, 3-adpting flange, the 4-person in charge, 5-arm, 6-conical jet hole, 7-blind plate, 8-walling of flue.
The specific embodiment
Now in conjunction with Figure of description, describe the specific embodiment of the present utility model in detail:
Be a kind of denitrating flue gas ammonia-gas spraying device as shown in Figure 1, 2, 3, comprise that one group is responsible for 4, be responsible for 4 along flue gas direction layered arrangement, direction is the flow of flue gas direction shown in Fig. 2, Fig. 3 arrow, and being responsible for 4 values that the interval S between the layer is set is 200～400mm; Each arranges the interior person in charge's 4 equidistant parallel setting of layer and vertical with the flue gas direction respectively, and each is responsible for 4 front and back correspondences one group of perpendicular arm that joins, is arranged in parallel 5 is set, as shown in Figure 1 and Figure 2; Arm 5 in the same vertical plane parallel with the flue gas direction constitutes step structure, as shown in Figure 3; Same arrange arm 5 in the layer about identical to arrangement pitches L with the front and back in conical jet hole 6 to arrangement pitches H, span is generally 150～450mm, each be responsible for 4 with its on arm 5 one of the formation that are connected independently spray the ammonia zone; Be symmetrical arranged conical jet hole 6 on the corresponding arm 5 in front and back centered by the person in charge 4 of joining with it, conical jet hole 6 is equipped with at the lee face of arm 5, adopts the taper hole structure of cylindrical portion and conical section combination and be symmetrical arranged two conical jet holes, 6 formation injection hole groups on same periphery centered by perpendicular bisector; The larynx footpath d of conical jet hole 6 cylindrical portion correspondences is 4～10mm, preferred 6～8mm, the injection angle of flare α of conical section correspondence is 15 °～45 °, preferred 20 °～35 °, and the center line angle β on the same periphery between two conical jet holes 6 is 60 ° ~ 150 °, preferred 80 °～120 °; Be responsible for 4 circulation area and be 1.5～3.0 times of the circulation area sum of the arm 5 that connects on this person in charge 4, preferred version is 1.6～2.0 times; The circulation area of described arm 5 is 2.0～5.0 times of circulation area sum of cylindrical portion for set conical jet hole 6 arrival ends on this arm 5, be preferably 2.5～4.0 times, basic identical to guarantee that each conical jet hole 6 in the same spray ammonia district all has a flow of sufficient injection flow and ejection; Being responsible for 4 tail ends connects respectively blind plate 7 is set, each is responsible for 4 arrival end and is connected cooperation by adpting flange 3 with tube connector 2 respectively, tube connector 2 arrival ends stretch out walling of flue 8 back and connect control valve 1 is set, each by be responsible for 4 with its on the spray ammonia district that constitutes of the arm 5 that is connected regulate separately, do not disturb mutually by the control valve 1 on this person in charge 4.
In above-described embodiment, more than the person in charge 4 is two-layer and two-layer along flue gas direction layout, each arranges that the person in charge 4 of equidistant parallel setting in the layer is more than two and two, corresponding arm 5 that arranges was more than two groups and two groups before and after each was responsible on 4, was responsible for that set injection hole groups is more than two groups and two groups on the corresponding arm 5 that arranges in 4 front and back.
In above-described embodiment, each be responsible for 4 and arm 5 one of the formation that are connected on it independently spray the ammonia zone, suppose to be responsible for 4 and along the flue gas direction m layer is set, the person in charge 4 quantity is the n root in each layer, then the interior spray of flue ammonia zone is slit into by average mark and there is not m * n the zone that size is identical, the parameter value of m and n does not have relevance, as long as more than or equal to 1, specifically should determine according to the specification of flue, nitrous oxides concentration in the flue gas and the removal efficiency of device etc.
In above-described embodiment, consider that the concrete running environment of each member and working life require to be responsible for 4, the pipe thickness of arm 5 should be more than or equal to 6mm, makes that the taper hole structure of opening has had injection and diffusion space preferably on the arm 5; Conical jet hole 6 adopts arm 5 bilateral symmetry grouping perforate design that the distributed quantity of spray orifice can be doubled, adopt the taper hole form of band larynx footpath and angle of flare can effectively improve spraying into and diffusion effect of reducing agent, along with arm 5 constitutes the diffusion area that stepped arrangement can enlarge reducing agent, extend the blending space of reducing agent in flue, further improve mixed effect.Below further combined with embodiment illustrate the utility model denitrification reducing agent spray into and mixing aspect the obvious application advantage that has, reducing agent adopts ammonia among the embodiment, its flow is 14kg/h, suppose that the person in charge 4 arranges number of stories m and gets 3, be responsible for 4 radicals that are arranged in parallel in each layer and get 3, inlet zone is divided into 3 * 3 totally 9 zones, correspondence is established 3 groups of arms 5 before and after on the every person in charge 4, establish 2 groups of totally 4 conical jet holes 6 on each arm 5, be that each spray ammonia district is furnished with 24 conical jet holes 6, the larynx in conical jet hole 6 is directly got 6mm, angle of flare α, center line angle β is respectively by 20 °, 120 ° of designs, the reducing agent distributed density at device 1m place, downstream as shown in Figure 5, distribution bias is about ± 30%; It is constant to install other condition, to be responsible for 4 arranges number of stories m and gets 1, be that individual layer adopts conical jet described in the utility model hole 6, be equivalent to replace nozzle of the prior art with the structure in conical jet hole 6, at the reducing agent distributed density at device 1m place, downstream as shown in Figure 6, distribution bias is about ± and 51%; And when adopting individual layer nozzle-type ammonia-gas spraying device of the prior art, the reducing agent distributed density at device 1m place, downstream as shown in Figure 7, distribution bias is about ± 88%; This shows that adopt corrugated cone cellular type ammonia-gas spraying device to compare with adopting individual layer taper hole formula ammonia-gas spraying device, the mixed effect of reducing agent and flue gas can improve about 40%; Adopt corrugated cone cellular type ammonia-gas spraying device to compare with adopting individual layer nozzle-type ammonia-gas spraying device, the mixed effect of reducing agent and flue gas can improve more than 60%.
In the utility model each be responsible for 4 and arm 5 one of the formation that are connected on it independently spray the ammonia zone, each reducing agent flow that sprays in the ammonia district can be controlled separately, not disturb mutually by control valve 1, has stronger varying duty adaptability; For the bigger flue of sectional dimension, the flue gas flow rate in each zone is not quite similar, and by the injection of reducing agent inbound traffics in the different spray with adjusting of the control ammonia district, can realize the reasonable distribution of reducing agent in the whole flue scope; Unit for variable load operation, the parameter fluctuation of flow of flue gas is bigger in its flue, can in time regulate the reducing agent amounts of spraying in the different spray ammonia district according to the fluctuate real time information feedback of parameter of flue gas, dynamically keep the optimum Match between reducing agent and flow of flue gas parameter.
Be responsible for 4 in the utility model, arm 5 all adopts low-carbon steel material, employing is welded to connect, spray ammonia in the flue be responsible for 4 by adpting flange (3 are connected cooperation with tube connector 2, tube connector 2 passes walling of flue 8 backs and control valve 1, can realize the integral demounting of internals during maintenance, the member that also each can be sprayed the ammonia district based on layering and zoning independence arrangement mounts and dismounts separately, installs, operation maintenance is more convenient; The on-the-spot installation do not need to arrange complicated support system, each structural member all supports, fixes by the simple and easy steelframe of establishing in addition in the flue, do not relate to nozzle, Forced Mixing device etc. yet, structure is simple relatively, to compare province's material obvious with traditional nozzle-type ammonia-gas spraying device, SCR denitrating flue gas project with a 300MW unit is example, only the buying of nozzle and installation quantity just can reduce about more than 300, simultaneously because the utility model need not to arrange the Forced Mixing device, make the flow resistance of flue gas in the flue on average can reduce about 80Pa, have the low advantage of operating cost; Simultaneously the straight section installation length because of package unit generally is not more than 1.3m, to the design of flue with arrange that the place has no special requirements, for old unit transformation and the restricted occasion of site condition, has significantly application advantage especially.
Claims (10)
1. denitrating flue gas ammonia-gas spraying device, comprise one group of person in charge (4), it is characterized in that being responsible for (4) along flue gas direction layered arrangement, each arranges layer interior person in charge (a 4) equidistant parallel setting and vertical with the flue gas direction respectively, each is responsible for (4) both sides correspondence one group of perpendicular arm that joins, is arranged in parallel (5) is set, arm (5) in the same vertical plane parallel with the flue gas direction constitutes step structure, and the corresponding arms in front and back (5) are gone up and be symmetrical arranged conical jet hole (6) centered by the person in charge (4) of joining with it.
2. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1, it is characterized in that the described person in charge (4) tail end connects respectively arranges blind plate (7), each arrival end of being responsible for (4) is connected cooperation by adpting flange (3) with tube connector (2) respectively, tube connector (2) cooperates with walling of flue (8) cross-under, and its arrival end connection arranges control valve (1).
3. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1 is characterized in that described with identical to arrangement pitches L with the front and back of conical jet hole (6) to arrangement pitches H about the arm in one deck (5).
4. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1 is characterized in that described conical jet hole (6) is equipped with the taper hole structure of lee face, employing cylindrical portion and conical section combination in arm (5).
5. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1, it is characterized in that described conical jet hole (6) is equipped with the lee face in arm (5), and on same periphery, centered by perpendicular bisector, be symmetrical arranged two conical jet holes (6) formation injection hole groups.
6. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1 is characterized in that the described person in charge's (4) the spacing that layer is set is 200～400mm.
7. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1, the circulation area that it is characterized in that the described person in charge (4) is 1.5～3.0 times of the circulation area sum of the arm (5) that connects on this person in charge (4); The circulation area of described arm (5) is 2.0～5.0 times that this arm (5) is gone up set conical jet hole (6) arrival end circulation area sum.
8. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 1, more than it is characterized in that the described person in charge (4) is two-layer and two-layer along flue gas direction layout, the person in charge (4) that equidistant parallel arranges in each layer is more than two and two, and the corresponding arm (5) that arranges was more than two groups and two groups before and after each person in charge (4) went up.
9. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 5, the taper hole structure that it is characterized in that described conical jet hole (6) employing cylindrical portion and conical section combination, the larynx footpath d of cylindrical portion correspondence is 4～10mm, the injection angle of flare α of conical section correspondence is 15 °～45 °, and the center line angle β on the same periphery between two conical jet holes (6) is 60 °～150 °.
10. a kind of denitrating flue gas ammonia-gas spraying device as claimed in claim 5 is characterized in that it is more than two groups and two groups that each arm (5) is gone up set injection hole groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220697797 CN203044243U (en) | 2012-12-17 | 2012-12-17 | Smoke denitration ammonia spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220697797 CN203044243U (en) | 2012-12-17 | 2012-12-17 | Smoke denitration ammonia spraying device |
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| Publication Number | Publication Date |
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| CN203044243U true CN203044243U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220697797 Expired - Lifetime CN203044243U (en) | 2012-12-17 | 2012-12-17 | Smoke denitration ammonia spraying device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007750A (en) * | 2012-12-17 | 2013-04-03 | 浙江天地环保工程有限公司 | Ammonia spraying device for flue gas denitrification |
| CN108246089A (en) * | 2018-03-14 | 2018-07-06 | 中国华电科工集团有限公司 | A kind of denitrating flue gas urea liquid spray gun |
| CN109499358A (en) * | 2018-12-26 | 2019-03-22 | 福建龙净脱硫脱硝工程有限公司 | Flue gas mixing heat riser and middle low temperature SCR denitration system |
| CN109718650A (en) * | 2019-02-28 | 2019-05-07 | 中国华能集团清洁能源技术研究院有限公司 | The staged injection apparatus of SNCR denitration system and the denitrating system for using the device |
| CN110124514A (en) * | 2019-06-04 | 2019-08-16 | 上海众仕环境科技股份有限公司 | A kind of dedicated upstream injection formula ammonia-spraying grid of Novel anti-blockage SCR denitration |
| CN110355011A (en) * | 2019-07-08 | 2019-10-22 | 北京清新环境技术股份有限公司 | A kind of pollutant solids removal agent injection apparatus |
-
2012
- 2012-12-17 CN CN 201220697797 patent/CN203044243U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007750A (en) * | 2012-12-17 | 2013-04-03 | 浙江天地环保工程有限公司 | Ammonia spraying device for flue gas denitrification |
| CN103007750B (en) * | 2012-12-17 | 2014-12-17 | 浙江天地环保工程有限公司 | Ammonia spraying device for flue gas denitrification |
| CN108246089A (en) * | 2018-03-14 | 2018-07-06 | 中国华电科工集团有限公司 | A kind of denitrating flue gas urea liquid spray gun |
| CN109499358A (en) * | 2018-12-26 | 2019-03-22 | 福建龙净脱硫脱硝工程有限公司 | Flue gas mixing heat riser and middle low temperature SCR denitration system |
| CN109718650A (en) * | 2019-02-28 | 2019-05-07 | 中国华能集团清洁能源技术研究院有限公司 | The staged injection apparatus of SNCR denitration system and the denitrating system for using the device |
| CN110124514A (en) * | 2019-06-04 | 2019-08-16 | 上海众仕环境科技股份有限公司 | A kind of dedicated upstream injection formula ammonia-spraying grid of Novel anti-blockage SCR denitration |
| CN110355011A (en) * | 2019-07-08 | 2019-10-22 | 北京清新环境技术股份有限公司 | A kind of pollutant solids removal agent injection apparatus |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310012, building 12, building 99, Huaxing Road, Hangzhou, Zhejiang, Xihu District Patentee after: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 310012, building 12, building 99, Huaxing Road, Hangzhou, Zhejiang, Xihu District Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 310012, building 12, building 99, Huaxing Road, Hangzhou, Zhejiang, Xihu District Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 310012, building 12, building 99, Huaxing Road, Hangzhou, Zhejiang, Xihu District Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
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| CX01 | Expiry of patent term |