CN206391869U - A kind of SCR denitration system eddy flow chip static mixer - Google Patents
A kind of SCR denitration system eddy flow chip static mixer Download PDFInfo
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- CN206391869U CN206391869U CN201720039726.5U CN201720039726U CN206391869U CN 206391869 U CN206391869 U CN 206391869U CN 201720039726 U CN201720039726 U CN 201720039726U CN 206391869 U CN206391869 U CN 206391869U
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- flue
- support beam
- static mixer
- spray ammonia
- eddy flow
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Abstract
The utility model discloses a kind of SCR denitration system eddy flow chip static mixer, including the horizontal support beam being uniformly arranged in flue cross section, it is vertical uniform on the horizontal support beam that multiple vertical support beams are set, mixer unit is set below the horizontal support beam and the cross junction of vertical support beam, the mixer unit includes being uniformly arranged on four spinning disks below cross junction in four orientation and sets two spray ammonia pipes below the spinning disk, it is respectively provided with each spray ammonia pipe between two nozzles, every two groups of mixer units and demarcation strip is set.Nitrogen oxides on flue section can be well mixed by the static mixer with ammonia large area, moreover it is possible to reduce the quality and quantity of inner supporting structure, reduce the quantity of spray ammonia pipe and nozzle in ammonia-spraying grid, simple in construction, cost is low.
Description
Technical field
The utility model is related to coal-fired plant flue gas denitration technology field, more particularly, to a kind of SCR denitration system eddy flow
Chip static mixer.
Background technology
At present, SCR denitration technology is widely applied, SCR denitration technology as the prevailing technology of coal-fired plant flue gas denitration
Ammonia is sprayed into flue gas as reducing agent, with the nitrogen oxides in flue gas（NOx）After being sufficiently mixed, in catalyst
Nitrogen oxides is resolved into water and nitrogen under effect.In this technological process, nitrogen oxides in the flue gas of catalyst upper strata with
Being sufficiently mixed for reducing agent-ammonia is most important with concentration field uniformity, in NH3Place too high/NOx, the escaping of ammonia rate can rise
Height, in NH3Place too low/NOx, denitration efficiency cannot be guaranteed.In addition, nitrous oxides concentration is not in flue section
It is equally distributed.Therefore, nitrogen oxides and ammonia are sufficiently mixed uniformly in flue section, need to be by flue
Static mixer.
Chinese Patent Application No. 201420092177.4 discloses a kind of double vortex SCR blenders of tangential, and it utilizes ladder
Shape plate causes transient state hair fastener whirlpool, longitudinal Vortex etc. so that the reducing agent for spraying into adjacent longitudinal Vortex centering multiplies the vortex of flow forward,
Hair fastener vortex strengthization mixing by transient state, makes reducing agent reach catalyst upper strata uniform concentration distribution.It is anti-that the device is arranged on SCR
Answer the entrance straight section of device prolate type, installed due to single, it is oversized not to be suitable for flue, otherwise this kind of blender size compared with
Greatly, it is unfavorable for being sufficiently mixed for nitrogen oxides on flue section.In the case of flue more prolate, this kind of blender size compared with
It is small and installation number is more, also it is unfavorable for being sufficiently mixed for nitrogen oxides on flue section.
Chinese Patent Application No. 201310172323.4 discloses a kind of injector grid with two-stage blender.It leads to
The first order and second level mixed plate is crossed to be sufficiently mixed the ammonia that four nozzle grids of outfit spray with flue gas；The first order and
Not only its quantity is more for second level mixed plate, and its is complicated, in addition it is also necessary to a large amount of inner supporting structures, four nozzle cascades of outfit
Lattice need also exist for a large amount of supporting constructions, and complicated, cost is higher.
Utility model content
In view of this, the purpose of this utility model is that there is provided a kind of SCR denitration system eddy flow in view of the shortcomings of the prior art
Nitrogen oxides on flue section can be well mixed by chip static mixer, the static mixer with ammonia large area, moreover it is possible to
The quality and quantity of inner supporting structure is reduced, the quantity of spray ammonia pipe and nozzle in ammonia-spraying grid, simple in construction, cost is reduced
It is low.
To reach above-mentioned purpose, the utility model uses following technical scheme：
A kind of SCR denitration system eddy flow chip static mixer, including the horizontal support beam being uniformly arranged in flue cross section,
It is vertical uniform on the horizontal support beam that multiple vertical support beams are set, under the horizontal support beam and the cross junction of vertical support beam
Side sets mixer unit, and the mixer unit includes being uniformly arranged on four rotations in four orientation below cross junction
Two nozzles, described every two are respectively provided with two spray ammonia pipes below flow and the setting spinning disk, each spray ammonia pipe
Demarcation strip is set between group mixer unit；
The a length of L of flue1, width is L4, distance is L between the spray ammonia pipe and walling of flue of both sides walling of flue2, spray
The distance between ammonia pipe is 2L2, distance is L between nozzle and walling of flue3, the distance between nozzle is 2L3, the L2=1/8L1,
L3=1/4L4；
The spinning disk is quadrilateral structure, and top is 30 ° -60 ° with following angle α, and top is vertical with left adjacent side, thick
Degree t is 6-12mm, upper length of side S2For 1.0 L3-2.0L3, lower length of side S3For 0.4S2-0.6S2, the left long H of adjacent side2=S2+S3；
The spray ammonia pipe caliber D=ammonia spraying amount/ammonia flow velocity, nozzle length H3=1.2D-1.5D, the spinning disk bottom margin spray
Ammonia pipe distance H1=8H3-10H3。
Further, the incline direction of four spinning disks is consistent, with flowing flue gas angle β for 45-65 °.
Further, the spinning disk is made of the metal of wear resistant corrosion resistant.
Further, the left adjacent side of four spinning disks is fixedly connected with close walling of flue or demarcation strip.
Further, the following extended line of four spinning disks in the mixer unit is met at a bit.
The beneficial effects of the utility model are：
1st, the spinning disk in the utility model is the quadrangular plate of metal material, in horizontal support beam and the cross of vertical support beam
It is uniformly distributed in four orientation below intersection, and incline direction is consistent, with flowing flue gas in 45-65 ° of angle, when flue gas is logical
When crossing spinning disk, under the guide functions of spinning disk, flue gas is glanced off.Wherein spinning disk top and following angle α be 30 °-
60 °, top is vertical with left adjacent side, and thickness is that t is 6-12mm, and top, the length of following and left adjacent side are all in accordance with flue
Length and width is designed, and the following extended line of four spinning disks in additional mixing device unit is met at a bit, this structure
Purpose be：In the presence of four spinning disks, the ammonia of the lower section of spinning disk is transported to through spray ammonia pipe and to flow flue gas with four
Axle is influenced each other centered on piece spinning disk, is ultimately formed rotary fluid and under flue gas effect of inertia, is flowed up, and is completed
One group of mixed cell cross section is thoroughly mixed.Meanwhile, the eddy flow that ammonia advances with flue gas is constantly mixed so that NH3
Even concentration is distributed in flue cross section, mixes more uniform with flue gas.
The 2nd, two spray ammonia pipes are set below every group of mixer unit of the utility model, wherein caliber D=spray ammonia of spray ammonia pipe
Amount/ammonia flow velocity, it can be ensured that ammonia and flue gas constant speed spray, during spinning disk is flowed through, can be abundant and uniform must expand
It is dispersed in rotary body air-flow.Nozzle length H3=1.2D-1.5D, spinning disk bottom margin spray ammonia pipe distance H1=8H3-10H3, this design
It may insure in the case of less spray ammonia pipe and nozzle, to make ammonia and flue gas reach sufficient mixing, do not mix dead angle, this
Utility model mixer unit sets spray ammonia nozzle only below spinning disk, can reduce spray ammonia compared with traditional AIG arrangement forms
The quantity of ammonia pipe and nozzle is sprayed in grid, so that the quantity and weight of flue inner supporting structure is also accordingly reduced.
3rd, the left adjacent side of four spinning disks in every group of mixer unit in the utility model and close walling of flue or
Demarcation strip is fixedly connected, i.e., the left adjacent side of four spinning disks is fixedly connected when closing on walling of flue with walling of flue, when closing on demarcation strip,
It is fixedly connected with demarcation strip, and the two ends of demarcation strip are also fixedly connected with walling of flue, mounting means makes full use of walling of flue conduct
Supporting construction, can enhancing structure stability.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of embodiment 1；
Fig. 2 be embodiment 1 in spinning disk front view；
Fig. 3 Fig. 1 front view；
Fig. 4 is Fig. 1 left view；
Fig. 5 is Fig. 1 top view.
In figure：1- horizontal support beams, 2- indulges support beam, 3- spray ammonia pipes, 4- nozzles, 5- spinning disks, 6- demarcation strips, 7- flues
Wall, 8- cross junctions.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.
Embodiment 1
As Figure 1-5, a kind of SCR denitration system eddy flow chip static mixer, including be uniformly arranged on flue cross section
On horizontal support beam 1, it is vertical uniform in the horizontal direction of horizontal support beam 1 that flue cross section in multiple vertical support beams 2, the present embodiment is set
Length L1=6000 mm, L4It is 2 that support beam is indulged in=3000 mm, the present embodiment, in horizontal support beam 1 and the cross of vertical support beam 2
The lower section of intersection 8 sets mixer unit, and wherein mixer unit includes being arranged on four vertical orientations in the lower section of cross junction 8
On four spinning disks 5 and two spray ammonia pipes 3 of the lower section of spinning disk 5 are set, be respectively provided with two nozzles 4 on each spray ammonia pipe 3, often
Demarcation strip 6 is set between two groups of mixer units.
As shown in figure 3, distance is L between nozzle 4 and walling of flue 73, L in the present embodiment3For 750 mm, between two nozzles
Distance be 2L3For 1500mm, distance is L between the spray ammonia pipe 3 and walling of flue 7 of both sides walling of flue 72For 750 mm, and spray
The distance between ammonia pipe 3 is 1500mm.
What wherein four spinning disks 5 were made of stainless steel, spinning disk 5 is quadrilateral structure, and top is with following angle α
30 ° -60 °, the present embodiment α is 45 °, and top is vertical with left adjacent side, and thickness is that t is that t is 10mm in 6-12mm, the present embodiment, on
Edge lengths S2For 1300mm, lower edge lengths S3For 700mm, left adjacent side length H2=2000mm, the upper end of spinning disk 5 and horizontal support beam 1
Or vertical support beam 2 is fixed, incline direction is consistent, with come to flow flue gas angle β be that β is 50 ° in 45-65 °, the present embodiment, it is and mixed
The following extended line of four spinning disks 5 in clutch unit is met at a bit, its left adjacent side and close walling of flue 7 or demarcation strip 6
It is fixedly connected, i.e., is welded when the left adjacent side of spinning disk closes on walling of flue with walling of flue, it is this with separating plate weld when closing on demarcation strip
Structure design, is in order that ammonia centered on four spinning disks come the flue gas that flows in flue gas inertia with axle formation rotary fluid and being made
Under, flow up, complete being thoroughly mixed in one group of mixed cell cross section, no dead angle.
It is 89 mm, nozzle length H that the caliber D of ammonia pipe 3 is sprayed in the present embodiment3For 120 mm, the bottom margin of spinning disk 5 spray
Ammonia pipe distance H1For 1000 mm.
Eddy flow chip static mixer in the utility model embodiment 1 is applied to certain coal-burning power plant, boiler load
350MW, exhaust gas volumn 1048666Nm3NOx concentration is 500mg/Nm in/h, 300-400 DEG C of flue-gas temperature, flue gas3, ammonia nitrogen ratio
0.916, NOx concentration is reduced to 50mg/Nm in final flue gas3Within, denitration efficiency is 90%, and ammonia slip concentration is reduced to 3ppm
Hereinafter, the requirement of coal-fired boiler in power plant " minimum discharge " standard is met.
Embodiment 2
Embodiment 2 is identical with the structure of embodiment 1, and difference is that the length and width of walling of flue is different, therefore other
Design parameter also has corresponding change.Flue cross section length L wherein in the present embodiment1=9200 mm, L4=4600mm, sets 2 groups
Mixer unit, L2=1150mm, L3=1150 mm, S2=2300mm, S3=920, t=10mm, α=40 °, H1=1000 mm, H2=
3220mm, D=89 mm, H3=120 mm。
The eddy flow chip static mixer of embodiment 2 is applied to certain coal-burning power plant, boiler load 600MW, exhaust gas volumn
2270000Nm3NOx concentration is 600mg/Nm in/h, 300-400 DEG C of flue-gas temperature, flue gas3, ammonia nitrogen compares 0.93, finally makes flue gas
Middle NOx concentration is reduced to 50mg/Nm3Within, denitration efficiency is 91.7%, and ammonia slip concentration is reduced to below 3ppm, meets power plant
The requirement of coal-burning boiler " minimum discharge " standard.
Finally illustrate, above example only to illustrate the technical solution of the utility model and unrestricted, this area
Other modifications or equivalent substitution that those of ordinary skill is made to the technical solution of the utility model, without departing from this practicality
The spirit and scope of new technique scheme, all should cover among right of the present utility model.
Claims (5)
1. a kind of SCR denitration system eddy flow chip static mixer, it is characterised in that：Including being uniformly arranged in flue cross section
Horizontal support beam（1）, the horizontal support beam（1）The upper vertical uniform multiple vertical support beams of setting（2）, in the horizontal support beam（1）With
Vertical support beam（2）Cross junction（8）Lower section sets mixer unit, and the mixer unit includes being uniformly arranged on cross
Intersection（8）Four spinning disks in the orientation of lower section four（5）With the setting spinning disk（5）Two spray ammonia pipes of lower section（3）,
Each spray ammonia pipe（3）On be respectively provided with two nozzles（4）, demarcation strip is set between every two groups of mixer units（6）；
The a length of L of flue1, width is L4, close to both sides walling of flue（7）Spray ammonia pipe（3）With walling of flue（7）Between distance be
L2, spray ammonia pipe（3）The distance between be 2L2, nozzle（4）With walling of flue（7）Between distance be L3, nozzle（4）The distance between be
2L3, the L2=1/8L1, L3=1/4L4；
The spinning disk（5）For quadrilateral structure, top is 30 ° -60 ° with following angle α, and top is vertical with left adjacent side, thickness
T is 6-12mm, upper length of side S2For 1.0 L3-2.0L3, lower length of side S3For 0.4S2-0.6S2, the left long H of adjacent side2=S2+S3；
The spray ammonia pipe（3）Caliber D=ammonia spraying amount/ammonia flow velocity, nozzle length H3=1.2D-1.5D, the spinning disk（5）Bottom margin
Spray ammonia pipe distance H1=8H3-10H3。
2. a kind of SCR denitration system eddy flow chip static mixer according to claim 1, it is characterised in that：Described four
Individual spinning disk（5）Incline direction it is consistent, with flowing flue gas angle β for 45-65 °.
3. a kind of SCR denitration system eddy flow chip static mixer according to claim 1, it is characterised in that：The rotation
Flow（5）It is made of the metal of wear resistant corrosion resistant.
4. a kind of SCR denitration system eddy flow chip static mixer according to claim 1, it is characterised in that：Described four
Individual spinning disk（5）Left adjacent side and close walling of flue（7）Or demarcation strip（6）It is fixedly connected.
5. a kind of SCR denitration system eddy flow chip static mixer according to claim 1, it is characterised in that：It is described mixed
Four spinning disks in clutch unit（5）Following extended line meet at a bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720039726.5U CN206391869U (en) | 2017-01-13 | 2017-01-13 | A kind of SCR denitration system eddy flow chip static mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720039726.5U CN206391869U (en) | 2017-01-13 | 2017-01-13 | A kind of SCR denitration system eddy flow chip static mixer |
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| Publication Number | Publication Date |
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| CN206391869U true CN206391869U (en) | 2017-08-11 |
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ID=59513536
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720039726.5U Active CN206391869U (en) | 2017-01-13 | 2017-01-13 | A kind of SCR denitration system eddy flow chip static mixer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731810A (en) * | 2017-01-13 | 2017-05-31 | 国网河南省电力公司电力科学研究院 | A kind of SCR denitration eddy flow chip static mixer |
| CN107398175A (en) * | 2017-09-06 | 2017-11-28 | 国电科学技术研究院 | A kind of carbon base catalyst desulfurization and denitrification integral reactor |
-
2017
- 2017-01-13 CN CN201720039726.5U patent/CN206391869U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731810A (en) * | 2017-01-13 | 2017-05-31 | 国网河南省电力公司电力科学研究院 | A kind of SCR denitration eddy flow chip static mixer |
| CN106731810B (en) * | 2017-01-13 | 2022-08-09 | 国网河南省电力公司电力科学研究院 | Swirl sheet type static mixer for SCR denitration |
| CN107398175A (en) * | 2017-09-06 | 2017-11-28 | 国电科学技术研究院 | A kind of carbon base catalyst desulfurization and denitrification integral reactor |
| CN107398175B (en) * | 2017-09-06 | 2023-09-22 | 国家能源集团科学技术研究院有限公司 | Desulfurization and denitrification integrated reactor for carbon-based catalyst |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee after: Henan jiuyu enpai Power Technology Co., Ltd Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Co-patentee after: State Grid Corporation of China Address before: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Co-patentee before: State Grid Corporation of China |
|
| CP01 | Change in the name or title of a patent holder |