CN207857132U - For electric precipitator skewed gas flow circulator - Google Patents
For electric precipitator skewed gas flow circulator Download PDFInfo
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- CN207857132U CN207857132U CN201820429493.4U CN201820429493U CN207857132U CN 207857132 U CN207857132 U CN 207857132U CN 201820429493 U CN201820429493 U CN 201820429493U CN 207857132 U CN207857132 U CN 207857132U
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- electric precipitator
- electric
- gas flow
- loudspeaker
- airflow
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Abstract
The utility model discloses one kind being used for electric precipitator skewed gas flow circulator, import loudspeaker and outlet loudspeaker including being located at electric precipitator tank ends, it is provided with the airflow-distribution board vertical with air motion direction in electric precipitator import loudspeaker, vertical channel-shaped plate is provided in electric precipitator outlet loudspeaker, the bottom of electric precipitator import loudspeaker is provided with reflux line, circulating fan is provided on reflux line；The lower section of electric precipitator babinet is equipped with the ash bucket being collected to dust.The utility model smoke backflow circulatory system is realizing partial fume forced refluence, while increasing the residence time of dust-contained airflow in the electric field, skewed gas flow also is formd in electric field region, improves the distribution of electric field region dust concentration, the dedusting potential of electric precipitator has been given full play to, efficiency of dust collection is improved.
Description
Technical field
The utility model belongs to industrial electro dust removal field, and in particular to skewed gas flow distribution, air-flow follow in a kind of electric precipitator
Loop device.
Background technology
One of an important factor for air flow method is influence ESP Efficiency, since air flow method can be by appropriate
Guiding device, distribution apparatus and forced-air blast or exhausting regulated and controled, and, economy and facility small with workload, not by
The advantage that place restricts, is often used by emphasis in Design of Electrostatic Precipitator, transformation process, to ensure that better dedusting is imitated
Fruit.It is both domestic and external studies have shown that air-flow is high using the low portion's flow velocity of top flow velocity in Electric Field in ESP entrance, in exit
Using the low distribution mode of top flow velocity relative superiority or inferiority portion flow velocity, i.e. skewed gas flow technology, each section powder inside electric precipitator can be improved
Dust concentration is distributed, and reduces reentrainment of dust, increases the residence time of air-flow in the electric field, to improve efficiency of dust collection.Electricity removes at present
Dirt device skewed gas flow distribution is mostly realized using various deflectors and airflow-distribution board, no matter deflector or air flow method
Plate, the effect is unsatisfactory for single use.In addition, disclosing a kind of skewed gas flow control electric precipitator (hair in power, Li Guodong et al.
The bright patent No.：200720026751.6), in the way of exhausting at the top of last electric field and import loudspeaker bottom blast, forcibly changing gas
Profile is flowed, to form skewed gas flow, but it is obvious that import air blast makes the processing tolerance of electric precipitator the shortcomings that this mode
Increase, the normal temperature air blasted so that flue-gas temperature declines in electric precipitator, once flue-gas temperature is less than acid dew point, will aggravate
The corrosion of equipment and pipeline, outlet exhausting can make the flue gas of Partial cleansing mistake be directly discharged in air, and this partial fume
There is no by further processing, the escape of dust and other noxious pollutants can be still caused.However, utilizing smoke backflow
The circulatory system, can be to avoid the adverse effect that the above problem is brought.Meanwhile flute profile is set in the outlet loudspeaker of electric precipitator
Plate can fail electric field the fine dust collected and reentrainment of dust etc. and be trapped again, further increase electric precipitator
Efficiency of dust collection.
Utility model content
To solve drawbacks described above existing in the prior art, the purpose of this utility model is to provide in a kind of electric precipitator
Skewed gas flow distribution, air current circulation.The device is realizing partial fume forced refluence, increases dust-contained airflow stopping in the electric field
While staying the time, skewed gas flow also is formd in electric field region, improves the distribution of electric field region dust concentration, has given full play to electric precipitator
Dedusting potential, improve efficiency of dust collection.
The utility model is realized by following technical proposals.
One kind being used for electric precipitator skewed gas flow circulator, including a horizontal type electric dust collector babinet, the electric precipitator
The both ends of babinet are respectively equipped with electric precipitator import loudspeaker and electric precipitator outlet loudspeaker, in the electric precipitator import loudspeaker
It is provided with the airflow-distribution board vertical with air motion direction, vertical channel-shaped plate is provided in electric precipitator outlet loudspeaker,
The bottom of electric precipitator import loudspeaker is provided with reflux line, and circulating fan is provided on reflux line, electric precipitator babinet
Lower section is equipped with the ash bucket being collected to dust.
On the basis of above technical scheme, there can also be improvement project further below：
The electric precipitator import loudspeaker are the rectangular centrum case that side plate is welded to each other the both ends open surrounded up and down；
Airflow-distribution board is distributed vertically in electric precipitator import loudspeaker.
The airflow-distribution board is 2~3 layers, and the stomata in array distribution, air-flow point are evenly equipped on the airflow-distribution board
The percent opening of fabric swatch is 30%~60%.
The airflow-distribution board is porous plate, X-shaped orifice plate or gullet plate.
When airflow-distribution board is porous plate, flow deflector is installed on airflow-distribution board, between flow deflector and airflow-distribution board
Angle be 45 °, flow deflector quantity and spacing are adjustable.
The vertical channel-shaped plate being arranged in the electric precipitator outlet loudspeaker is 1~2 row, adjacent according to being vertically uniformly distributed
Two rows are staggeredly arranged；Vertical channel-shaped plate is thin-wall channel.
The utility model has the beneficial effects that：
First, using the airflow-distribution board and flow deflector being arranged in the device import loudspeaker, make import primary air in level
It is uniformly distributed.
Secondly, the gas backstreaming circulatory system realizes partial fume forced refluence, and skewed gas flow may be implemented, and increases dust-contained airflow
Residence time in the electric field improves the distribution of electric field region dust concentration, can effectively improve the efficiency of dust collection of electric precipitator.Simultaneously should
Device may be implemented in electric precipitator internal electric field intermediate region by adjusting the wind speed that electric precipitator reflux line gas backstreaming recycles
Meet plane irrotational flow, vortex and three only will produce due to the friction between air and side wall in the part contacted with side wall
Dimension flowing, but streamline for entire electric precipitator and velocity field influence little, and electric field main body is in parallel skewed gas flow flow pattern.
Further more, outlet trough plate adjusts exit flow distribution and to the secondary trapping of dust, electric precipitation can be given full play to
The dedusting potential of device, further increases efficiency of dust collection.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 (a), 2 (b), 2 (c), 2 (d), 2 (e) are respectively the front view of three pieces of airflow-distribution boards of the utility model, left view
The partial enlarged view of figure, vertical view, the partial enlarged view of distribution grid (one) and distribution grid (two)；
Fig. 3 (a), 3 (b), 3 (c) are respectively front view, left view and the vertical view of the outlet vertical channel-shaped plate of the utility model
Figure；
Fig. 4 is source stream and confluence schematic diagram；
In figure：1, electric precipitator import loudspeaker；2, airflow-distribution board；3, flow deflector；4, electric precipitator babinet；5, valve；
6, reflux line；7, circulating fan；8, vertical channel-shaped plate；9, electric precipitator outlet loudspeaker.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples, but is not intended as to this practicality
The novel foundation for doing any restrictions.
As shown in Figure 1, one kind of the utility model is used for electric precipitator skewed gas flow circulator, including a Horizontal electric removes
The both ends of dirt device babinet 4, electric precipitator babinet 4 are respectively equipped with electric precipitator import loudspeaker 1 and electric precipitator outlet loudspeaker 9,
The airflow-distribution board 2 vertical with air motion direction is provided in electric precipitator import loudspeaker 1, in electric precipitator outlet loudspeaker 9
It is inside provided with vertical channel-shaped plate 8, is provided in the bottom of electric precipitator import loudspeaker 1 and is extended to 4 tail portion of electric precipitator babinet and arrive
The reflux line 6 at top is provided with valve 5 and circulating fan 7 on reflux line 6.
Wherein, electric precipitator import loudspeaker 1 are the rectangular centrum that side plate is welded to each other the both ends open surrounded up and down
Case；The reflux line of the electric precipitator gas backstreaming circulatory system be rectangle or square pipe, the blast orifice of electric precipitator babinet 4 and
The rectangular centrum case flanged joint of suction opening and electric precipitator import loudspeaker 1 and electric precipitator outlet loudspeaker 9.House outlet loudspeaker
Interior vertical channel-shaped plate 8 is thin-wall channel.Airflow-distribution board 2 is perpendicular perpendicular to airflow direction in electric precipitator import loudspeaker 1
Straight distribution.The circulating fan of the electric precipitator gas backstreaming circulatory system is the suitably common wind turbine of power or frequency conversion fan.Electricity removes
The valve of the dirt device gas backstreaming circulatory system is shut-off valve.The lower section of electric precipitator babinet 4 is equipped with the ash bucket to dust collection.
Smoke backflow cyclic system is set between at the top of the bottom of electric precipitator import loudspeaker 1 and electric precipitator end electric field
System, the circulatory system is by reflux line 6, valve 5, the accessories composition such as circulating fan 7 and connection flange, gasket used.Reflux
The circulatory system is the core of the device, and reflux ratio is the key that control skewed gas flow, is flowed back according to required skewed gas flow angle-determining
Than.
As shown in Fig. 2 (a)-Fig. 2 (e), airflow-distribution board 2, airflow-distribution board 2 are set in electric precipitator import loudspeaker 1
It is 2~3 layers, the stomata in array distribution is evenly equipped on airflow-distribution board 2, airflow-distribution board is porous plate, X-shaped orifice plate or sawtooth
Plate.When airflow-distribution board is porous plate, the percent opening of airflow-distribution board 2 is 30%~60%.Close to electric precipitator babinet 4
Two pieces of airflow-distribution boards on flow deflector 3 is installed, angle between flow deflector 3 and airflow-distribution board 2 is 45 °, flow deflector quantity with
Spacing is adjustable.
As shown in Fig. 3 (a), 3 (b), 3 (c), the vertical channel-shaped plate 8 being arranged in electric precipitator outlet loudspeaker 9 is 1~2 row,
Vertical channel-shaped plate be 8 thin-wall channels according to being vertically uniformly distributed, adjacent two rows are staggeredly arranged.
Frequency conversion circulating fan is selected, the design current velocity of the wind speed that the reflux line gas backstreaming of the present apparatus is recycled is 5~
The length to height ratio of 15m/s, electric precipitator are 2:When 1, corresponding reflux ratio is respectively 4.5%~8%, and it is wide to meet electric precipitator skewed gas flow
The bias current coefficient of line is less than 0.15m/s.
The utility model can also realize the different inclination angle of Electric Field in ESP area air-flow by adjusting smoke backflow ratio
Degree.When the value of air velocity vector and the angle α of horizontal direction is 1.1 °~1.9 ° at electric precipitator center, typical five electric fields
Electric precipitator (length to height ratio 2:1) preferable skewed gas flow flow pattern can be formed, skewed gas flow flow pattern can improve electric field region dust concentration
Distribution, effectively increases the efficiency of dust collection of electric precipitator.
For different flue gas and Dust Characteristics, different electrostatic precipitator structure forms, air velocity vector and level side
Size to angle α is also different, by adjusting the size of reflux ratio, can realize that preferable skewed gas flow is wide in electric precipitator
Line.
The operation principle of the utility model is：
1. airflow pattern
A kind of circulator for electric precipitator skewed gas flow technology is mainly characterized by and utilizes exhausting at the top of last electric field
The parallel oblique flowing of electric field region air-flow, i.e. skewed gas flow flow pattern are realized with import loudspeaker bottom blast mode.By blast orifice and
Suction opening is reduced in xoy planes, and coordinate is the source that an intensity at (- a, 0) is Q and coordinate is that there are one strong at (0, b)
Degree is the remittance of-Q, as shown in Figure 4.Meet if there is stream function Ψ：(1) x-axis, y-axis are parallel to x-axis at a distance of b and to be parallel to
Y-axis is apart all streamline by each axis of a and can be replaced with solid wall surface；(2) have in the flow gone out by source stream and only 1/4
It flows into and converges.Stream function Ψ can be then utilized to calculate the flow pattern of skewed gas flow.
It is following to give skewed gas flow VELOCITY DISTRIBUTION such as table 1 in electric precipitator, typical five electric field electric precipitators (long/height=2/
1) VELOCITY DISTRIBUTION of the compound skewed gas flow of each point such as table 2 in.
Skewed gas flow VELOCITY DISTRIBUTION unit in 1 electric precipitator of table：m/s
Composite inclined Velocity Profiles unit in 2 electric precipitator of table：m/s
3. skewed gas flow evaluation criterion
(1) bias current factor evaluation standard
The key of skewed gas flow technology is to determine that the optimum tilt angle of inlet and outlet speed, G.Hein introduce a kind of two dimension meter
Model is calculated, its maneuverability when changing using the import of technique study electric precipitator and the exit flow velocity flow profile of mesh generation
The variation of energy.The computation model specific method is：Assuming that air-flow is two-dimentional inviscid fluid, and from import to outlet air flow velocity
For linear change, coordinate system is established using the dust collector pole lower left corner as origin, it can according to the definition linearized from import to exit velocity
To calculate the horizontal wind speed of any point in electric field.
Selection exit flow flow velocity is characterized by bottom airflow flow velocity should be low, and top stream flow velocity should be high, and most
High point air-flow velocity is 1.3 times of section average value.Choose flow velocity u at the top of admission section1=0.78m/s, admission section bottom
Flow velocity u2=1.22m/s, Outlet Section top flow velocity u3=1.22m/s, Outlet Section bottom velocity u4=0.78m/s is calculated
Skewed gas flow velocity profile desired value.Take the bias current coefficient of desired airflow velocity profile as evaluation criteria, specific method is：Each
Horizontal line divided by after section mean wind speed subtracts desired value, and multiplied by with section mean wind speed, numerical value is less than their difference
Thinking for 0.15m/s is qualified.
Set mainstream speed u0For 1m/s, the area of blast orifice and suction opening is the 1/20 of electric field sectional area, is approximately considered
It is equal to the air velocity of blast orifice and suction opening close to the air velocity of source (- a, 0) and remittance (0, b).When reflux ratio is 5%,
Blast orifice and suction opening air velocity are 1m/s, calculate the velocity profile of electric precipitator (long/height=2/1) interior each point skewed gas flow
Desired value (not including electric field boundary) is shown in Table 3, and each point bias current coefficient is shown in Table 4.
Skewed gas flow velocity profile desired value (reflux ratio=5%) unit in 3 electric precipitator of table：m/s
Skewed gas flow bias current coefficient (reflux ratio=5%) in 4 electric precipitator of table
Can be seen that from above-mentioned computational chart when reflux ratio is 5%, in vertical direction flow velocity distribution theory calculate data with
The desired value fitness of ideal skewed gas flow velocity profile is fine, and entire section longitudinal direction velocity flow profile has been provided with the air-flow of skewed gas flow
Distribution trend, vertical deviation also substantially conform to the evaluation criteria less than 0.15m/s, and the horizontal velocity flow profile of cross sections is relatively equal
It is even.
By further calculating electric precipitator in the composite inclined air-flow velocity profile value of different reflux ratios, then carry out
Skewed gas flow is evaluated, and can show that the reflux ratio of the preferable skewed gas flow profile of typical five electric field electric precipitators (long/height=2/1) is about
4.5%~8%.
(2) air-flow angle α evaluation criterion
Set mainstream speed u0For 1m/s, the area of blast orifice and suction opening is the 1/20 of electric field sectional area, is approximately considered
It is equal to the air velocity of blast orifice and suction opening close to the air velocity of source (- a, 0) and remittance (0, b).When reflux ratio is 4.5%
When, blast orifice and suction opening air velocity are 0.9m/s, and when reflux ratio is 8%, blast orifice and suction opening air velocity are
1.6m/s, the inclination angle alpha distribution for calculating separately typical five electric field electric precipitators (long/height=2/1) interior each point skewed gas flow (are not wrapped
Boundary containing electric field) such as table 5 and table 6；
Skewed gas flow inclination angle alpha is distributed (reflux ratio=4.5%) unit in 5 electric precipitator of table：Degree
Skewed gas flow inclination angle alpha is distributed (reflux ratio=8%) unit in 6 electric precipitator of table：Degree
It can be seen that from above-mentioned computational chart when the value of α is 1.1 °~1.9 °, five electric field electric precipitators of typical case (long/
High=2/1) preferable skewed gas flow can be formed.Therefore, air velocity vector and horizontal direction at electric precipitator center can be used
Angle α is as evaluation index.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this
For the technical staff in field according to disclosed technology contents, not needing performing creative labour can be special to some of which technology
Sign makes some and replaces and deform, these are replaced and deformation is within the protection scope of the present utility model.
Claims (6)
1. one kind being used for electric precipitator skewed gas flow circulator, which is characterized in that including a horizontal type electric dust collector babinet (4),
The both ends of the electric precipitator babinet (4) are respectively equipped with electric precipitator import loudspeaker (1) and electric precipitator outlet loudspeaker (9),
It is provided with the airflow-distribution board vertical with air motion direction (2) in the electric precipitator import loudspeaker (1), is gone out in electric precipitator
It is provided with vertical channel-shaped plate (8) in mouth loudspeaker (9), the bottom of electric precipitator import loudspeaker (1) is provided with reflux line (6),
Circulating fan (7) is provided on reflux line (6)；The lower section of electric precipitator babinet (4) is equipped with the ash bucket being collected to dust.
2. according to claim 1 a kind of for electric precipitator skewed gas flow circulator, which is characterized in that the electric precipitation
Device import loudspeaker (1) are the rectangular centrum case that side plate is welded to each other the both ends open surrounded up and down；Airflow-distribution board (2) exists
It is distributed vertically in electric precipitator import loudspeaker (1).
3. according to claim 1 a kind of for electric precipitator skewed gas flow circulator, which is characterized in that the air-flow point
Fabric swatch (2) is 2~3 layers, and the stomata in array distribution, the trepanning of airflow-distribution board (2) are evenly equipped on the airflow-distribution board (2)
Rate is 30%~60%.
4. according to claim 1 a kind of for electric precipitator skewed gas flow circulator, which is characterized in that the air-flow point
Fabric swatch (2) is porous plate, X-shaped orifice plate or gullet plate.
5. according to claim 4 a kind of for electric precipitator skewed gas flow circulator, which is characterized in that work as air flow method
When plate (2) is porous plate, flow deflector (3), the angle between flow deflector (3) and airflow-distribution board (2) are installed on airflow-distribution board (2)
Degree is 45 °, and flow deflector quantity and spacing are adjustable.
6. according to claim 1 a kind of for electric precipitator skewed gas flow circulator, which is characterized in that the electric precipitation
The vertical channel-shaped plate (8) being arranged in device outlet loudspeaker (9) is 1~2 row, and according to being vertically uniformly distributed, adjacent two rows are staggeredly arranged；
Vertical channel-shaped plate is (8) thin-wall channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429493.4U CN207857132U (en) | 2018-03-28 | 2018-03-28 | For electric precipitator skewed gas flow circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429493.4U CN207857132U (en) | 2018-03-28 | 2018-03-28 | For electric precipitator skewed gas flow circulator |
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| Publication Number | Publication Date |
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| CN207857132U true CN207857132U (en) | 2018-09-14 |
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ID=63455901
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820429493.4U Expired - Fee Related CN207857132U (en) | 2018-03-28 | 2018-03-28 | For electric precipitator skewed gas flow circulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745646A (en) * | 2018-06-04 | 2018-11-06 | 广东电网有限责任公司 | A kind of electric precipitator and its airflow uniform distribution device |
| CN110193275A (en) * | 2018-09-08 | 2019-09-03 | 浙江大维高新技术股份有限公司 | A kind of garbage-incineration smoke purifying method and device |
-
2018
- 2018-03-28 CN CN201820429493.4U patent/CN207857132U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108745646A (en) * | 2018-06-04 | 2018-11-06 | 广东电网有限责任公司 | A kind of electric precipitator and its airflow uniform distribution device |
| CN110193275A (en) * | 2018-09-08 | 2019-09-03 | 浙江大维高新技术股份有限公司 | A kind of garbage-incineration smoke purifying method and device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180914 |