CN103611629A - Electric dust remover with double rotary polar plates - Google Patents
Electric dust remover with double rotary polar plates Download PDFInfo
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- CN103611629A CN103611629A CN201310640365.6A CN201310640365A CN103611629A CN 103611629 A CN103611629 A CN 103611629A CN 201310640365 A CN201310640365 A CN 201310640365A CN 103611629 A CN103611629 A CN 103611629A
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Abstract
The invention relates to an electric dust remover with double rotary polar plates. The electric dust remover comprises a dust remover shell, a fixed electric field, rotary electric fields, a dust hopper and a dust cleaning brush, and is characterized in that one or more fixed electric fields are arranged at the front end, close to an air inlet, of a dust remover body; two rotary electric fields are arranged at the rear end, close to an air outlet, of the dust remover. By the adoption of the technical, the concentration of dust entering the last-stage rotary electric field can be controlled effectively; moreover, the secondary dust re-entrainment can be prevented relatively well; the overall dust removal effect of the dust remover is improved; high-concentration dust-containing flue gas meets emission requirements easily, and key operating mechanisms work stably and reliably.
Description
Technical field
The present invention relates to a kind of novel double back and turn polar plate electric dust collector, belong to the flue gas ash removal field of air contaminant treatment.
Background technology
Current China coal-burning power plant and metallurgy, chemical industry, coal electricity, the cleaner great majority of building material industry adopt electrostatic precipitator, the major advantage of electrostatic precipitator is that smoke treatment amount is large, high temperature resistant, efficiency of dust collection is high, wide accommodation, equipment resistance is low, use simple and reliable in, low and the non-secondary pollution of operating cost, but also exist intrinsic drawback, the one, low to the efficiency of dust collection of the dust of high specific resistance, the 2nd, the caused secondary dust of rapping dust suction pole plate, make electric cleaner outlet dust concentration higher, serviceability is unstable, can not reach national requirements for environmental protection.In order to address the above problem, as far back as late 1970s, there is enterprise just to start on the basis of electrostatic precipitator abroad, most end one-level stationary electric field is transformed into revolution electric field, become the traveling electrode deduster of stationary electric field and the combination of a revolution electric field, part has solved the efficiency of dust collection problem of high resistivity dust, has also avoided part reentrainment of dust.But when the dust concentration that enters revolution electric field is when excessive, still there is the problem that efficiency of dust collection is not high.And the dust concentration that enters mobile electric field is higher, the dust concentration that deduster is discharged is higher.Existing traveling electrode deduster, owing to being difficult to control the dust concentration of the revolution electric field that enters into most end, causes being difficult to reach national dust emission standard.
Summary of the invention
Prior art problem to be solved by this invention is exactly the dust concentration that enters most end one-level revolution electric field by adopting technical solution of the present invention, controlling, and makes deduster relatively easily reach dust emission requirement.
To achieve these goals, the present invention has adopted following technical scheme: a kind of double back turns polar plate electric dust collector, comprise outer case of dust remover (1), stationary electric field (2), revolution electric field (15), ash bucket (12), dust cleaning brush (10), is characterized in that: described stationary electric field (2) is located at deduster by the front end of air inlet (13), and quantity is one or more, described revolution electric field (15) quantity is two, is located at deduster by the rear end of gas outlet (8).When deduster is worked, first flue gas enters stationary electric field (2), stationary electric field can and be disposed most adsorbing powder dust, remaining few part dust enters into first revolution electric field (15) with flue gas, revolution electric field positive plate (4) is under the effect of electric field force and the drive of chain, dust suction is on one side done reciprocating rotating motion along with connecting the chain (19) of its both sides along positive plate revolution chain link (7) on one side, when being turned back to the middle dust cleaning brush of ash bucket (12) position, having adsorbed the dust cleaning brush (10) that the positive plate (4) of a large amount of dust is arranged in ash bucket (12) brushes away the dust of absorption and shakes off in ash bucket, at this moment, the positive plate of being wiped clean (4) starts new one along positive plate revolution chain link (7) again and takes turns dust suction-deashing reciprocation cycle.This working method of revolution electric field (15), can make Yang Banban (4) often keep clean, overcomes that dust that stationary electric field dust collecting pole plate is easily collected into covers and the back corona phenomenon that occurs, the problem of avoiding the dust collecting pole plate ability of gathering dust obviously to reduce.Thereby can guarantee preferably that the exhaust gas dust concentration of going out by revolution electric field is very low.Prior art traveling electrode deduster is only considered and is adopted a revolution electric field, by improving the efficiency of dust collection of last electric field, reaches and improve the overall efficiency of dust collection object of deduster.But be also one of key factor that can dust up to standard owing to entering the fuel gas and dust concentration of revolution electric field, even if last electric field efficiency of dust collection is very high, when entering last electric field dust concentration also in very high situation, also the dust emission standard that is difficult to reach national regulation, can only approach and reach state emission standard.The present invention enters the last revolution electric field dust concentration from control and starts with, and adopts two revolution electric fields, correspondingly reduces stationary electric field setting.First revolution electric field plays a control action, as existing traveling electrode deduster, after an above stationary electric field and a revolution electric field, although fuel gas and dust concentration is difficult to directly reach the dust emission standard of national regulation, but at least also can reach the level that approaches national dust emission standard, this has just controlled the dust concentration that enters the last revolution electric field.After this, when flue gas enters second revolution electric field (16) again, owing to entering, the second electric field concentration is low, the second revolution electric field efficiency of dust collection is high again, and deduster just reaches dust emission requirement naturally with comparalive ease.
As preferably, described revolution electric field consists of some groups of positive plate revolution chain links (7), ash bucket (12) is located under positive plate revolution chain link (7), the bottom of positive plate revolution chain link (7) is located among ash bucket (12), positive plate revolution chain link (7) is set to electric field region on ash bucket (12), ash bucket is set to non-electric field district among (12), described dust cleaning brush (10) is located in ash bucket (12), every two dust cleaning brushs (10) correspondence be arranged in positive plate revolution chain link (7) positive plate (4) two sides and with positive plate (4) close contact.During deashing, because dust cleaning brush is located at non-electric field district, the dust under clear can again not adsorbed by electric field region pole plate in dropping process again, affect cleaning efficiency, meanwhile, the dust of removing drops in ash bucket rather than electric field region, the air-flow that can not crossed by electric field region Rapid Flow is taken away in a large number, causes secondary pollution.
Further, described ash bucket (12) mouthful position is provided with and opens and closes interrupter (9), dust cleaning brush (10) is located at and opens and closes under interrupter (9), the hole that only can allow that chain (19) and positive plate (4) and the dust adsorbing pass through is set opening and closing the chain (19) of interrupter (9) and positive plate revolution chain link (7) and positive plate (4) intersection, by ash bucket with turn round that electric field region is relative to be isolated.When dust cleaning brush (10) brushes away the dust attaching on pole plate, the dust falling, opening and closing under the buffer action of interrupter (9), can guarantee better can not go to electric field region and go, and substantially can in air, not remove to cause reentrainment of dust along with flue gas escapes into.In order to prevent from opening and closing dust fall on interrupter (9) plate, heap, can pass through to open and close interrupter (9) and open, remove the control of dust on division board, guarantee that deduster work is not affected by dust fall heap.
Further, the power-driven mechanism (3) of described positive plate revolution chain loop device (7) and the power-driven mechanism (11) of dust cleaning brush (10) adopt frequency conversion adjusting device.Because dust characteristic is ever-changing, cleaner and energy-conservation in order to guarantee on positive plate, maximum alleviates the wearing and tearing of revolution electric field mechanical facility, according to dust characteristic, can adjust positive plate speed of gyration and dust cleaning brush velocity of rotation by frequency conversion adjusting device, effectively adjust deashing frequency, avoid better back corona phenomenon to occur.
Further, described drive sprocket bearing (6) is arranged on plain bearing housing (17).Because chain (19) easy generation in motion process worn and torn and thermal expansion, cause chain (19) can become flexible after use a period of time, cause rotating positive plate (4) shake, polar plate spacing is often changed, electric field electric current shakiness, causes efficiency of dust collection decline.Plain bearing housing (17) is set, can slides up and down by plain bearing housing (17), drive drive sprocket to move up and down, thereby adjust the chain tension degree being linked easily, make LINK system motion stabilization reliable.Adjust rear fixedly plain bearing housing.
The invention has the beneficial effects as follows: adopt the present invention, compare with conventional traveling electrode deduster, can effectively control the dust concentration that enters the last revolution electric field of deduster, and can guarantee better to prevent the generation of reentrainment of dust, improve the overall efficiency of dust collection of deduster, the flue gas of the dust that makes to contain high concentration more easily reaches emission request, and crucial works working stability is reliable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is structure and the position view of positive plate of the present invention revolution link mechanism and dust cleaning brush, switching interrupter.
Fig. 3 is the schematic diagram of plain bearing housing of the present invention.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the A-A cutaway view of Fig. 3.
Mark in figure: 1 outer case of dust remover, 2 stationary electric fields, the power-driven mechanism of 3 anode revolution chain links, 4 positive plates, 5 drive sprockets, 6 drive sprocket bearings, 7 positive plate revolution chain links, 8 gas outlets, 9 open and close interrupter, 10 dust cleaning brushs, the power-driven mechanism of 11 dust cleaning brushs, 12 ash buckets, 13 air inlets, 14 holes, 15 revolution electric fields, 16 revolution electric fields, 17 plain bearing housings, 18 cathode line, 19 chains, 20 slide rails, 21 by movable sprocket, 22 axles, 23 adjust push rod, 24 fixed blade plates, 25 moving vane plates, 26 square bearing pedestals, 27 push rod pedestals, 28 trip bolts, 29 slide rail substrates, 30 hydrodynamic reciprocating sealing circles, 31 chutes, 32 nuts, 33 deduster wallboards, 34 attachment screws.
The specific embodiment
Below by embodiment, the invention will be further described by reference to the accompanying drawings.
As shown in Figure 1, a kind of double back of the present invention turns polar plate electric dust collector, comprise outer case of dust remover (1), a stationary electric field (2), two are turned round electric field (15), (16), ash bucket (12), dust cleaning brush (10), stationary electric field (2) is located at deduster by the front end of air inlet (13), and revolution electric field is located at deduster by the rear end of gas outlet (8).Deduster front end arrange stationary electric field be because its repair and maintenance workload is relatively little, better to absorption big particle effect, be also in order to alleviate the wearing and tearing to the higher revolution electric field of investment; Rear end arranges two revolution electric fields, to allow first revolution electric field play crucial control action, make to enter the exhaust gas dust concentration of second revolution electric field close to the level of national dust emission standard through after first revolution electric field dedusting, when now flue gas enters into second revolution electric field again, due to enter second revolution electric field dust concentration low, efficiency of dust collection is high, naturally than the discharge standard that is easier to reach national regulation.
As shown in Fig. 2, Fig. 1, revolution electric field consists of some groups of positive plate revolution chain links (7), before and after every group of positive plate revolution chain link (7), is arranged in parallel.Each positive plate revolution chain link (7) is by two chains (19), some positive plates (4), a pair of drive sprocket (5), a pair of by movable sprocket (21), two axles (22) form, two chains (19) of anode revolution chain link are connected with the both sides of positive plate (4) respectively, some positive plates (4) are longitudinally contacted, with drive sprocket, driven sprocket, axle form one complete can rotating positive plate chain link.Among positive plate revolution chain link (7) and between positive plate revolution chain link (7), be provided with cathode line (18), form the arrangement of yin, yang the two poles of the earth positioned opposite.During work, high voltage source puts on yin, yang the two poles of the earth, forms high voltage electric field, and positive plate is as dust suction pole plate, under the drive of the power-driven mechanism (3) of anode revolution chain link, on one side dust suction, move up and down on one side.If take, by movable sprocket (21), described as starting point, under the drive of the chain (19) that positive plate (4) connects in both sides, along positive plate revolution chain link (7), move from bottom to top, while arriving dust cleaning brush (10) position, the dust cleaning brush being rotated (10) brushes absorption dust thereon, while arriving drive sprocket (5), turn back and move downward, while arriving by movable sprocket (21), start new one and take turns revolution circulation.This structure and the working method of revolution electric field determined that revolution electric field compares stationary electric field, can often keep clean on dust collecting pole plate, can as fixed electrode, can not produce the dust cake that reaches anti-corona, thereby avoid dust collector pole to be capped and the problem of generation dust collection efficiency decline.
As shown in Figure 1 and Figure 2, ash bucket (12) is located under positive plate revolution chain link (7), the bottom of positive plate revolution chain link (7) is located among ash bucket (12), positive plate revolution chain link (7) is set to electric field region on ash bucket (12), ash bucket is set to non-electric field district among (12), dust cleaning brush (10) is located in ash bucket (12), every two dust cleaning brushs (10) correspondence be arranged in positive plate revolution chain link (7) positive plate (4) two sides and with positive plate (4) close contact.During deashing, because dust cleaning brush is located at non-electric field district, the dust under clear can again not adsorbed by electric field region pole plate in dropping process again, affect cleaning efficiency, meanwhile, the dust of removing drops in ash bucket rather than electric field region, the air-flow that can not crossed by electric field region Rapid Flow is taken away in a large number, causes secondary pollution.The preferred dust cleaning brush of the present embodiment is pulley type rotating ash removal brush.
As shown in Figure 1, ash bucket (12) mouthful position is provided with and opens and closes interrupter (9), and dust cleaning brush (10) is located at and opens and closes under interrupter (9).As shown in Figure 2, the present embodiment opens and closes interrupter (9) louvre type that preferably large power plant is conventional and opens and closes baffle ventilation door, at chain (19) and positive plate (4), only can allow with the upper setting of the fixed blade plate (24) that opens and closes baffle ventilation door intersection the hole that the dust of chain (19) and positive plate (4) and absorption passes through.In the normal operation of deduster, open and close moving vane plate (25) on baffle ventilation door in closure state, by ash bucket and revolution, electric field region is relative isolates, and the dust under is clearly isolated in ash bucket better, be unlikely to float to electric field region and go, guaranteed that deduster does not produce reentrainment of dust substantially.In order to prevent that the upper a small amount of dust fall of moving vane plate (25) from heaping for a long time, affect deduster normal operation, can, regularly by opening moving vane plate (25), make dust naturally fall into ash bucket.
As shown in Figure 1, the power-driven mechanism (3) of positive plate revolution chain link (7) and the power-driven mechanism (11) of dust cleaning brush (10) adopt variable-frequency motor.Because dust characteristic is ever-changing, cleaner and energy-conservation in order to guarantee on positive plate, maximum alleviates the wearing and tearing of revolution electric field mechanical facility, according to dust characteristic, can adjust positive plate speed of gyration and dust cleaning brush velocity of rotation by variable-frequency motor, adjust practically deashing frequency, avoid better back corona phenomenon to occur.
As shown in Figure 1 and Figure 2, drive sprocket bearing (6) is arranged on plain bearing housing (17).Can be loosening after the chain (19) that easily wearing and tearing and thermal expansion occurs for fear of chain (19) in motion process and cause uses a period of time, cause rotating positive plate (4) shake, polar plate spacing is often changed, electric field electric current is unstable, cause efficiency of dust collection to decline, drive sprocket bearing (6) is arranged on plain bearing housing (17).As shown in Fig. 3, Fig. 4, Fig. 5, plain bearing housing (17) is adjusted push rod (23), push rod pedestal (27), slide rail (20), slide rail substrate (29), drive sprocket bearing (6), trip bolt (28), attachment screw (34), hydrodynamic reciprocating sealing circle (30) formation by square bearing pedestal (26), chute (31).Described slide rail (20) is dovetail shape, totally two, is fixed on abreast side both sides of slide rail substrate (29).Described chute (31) is dove-tail, totally two, is distributed in abreast side both sides of square bearing pedestal (26).Chute (31) is chimeric mutually with slide rail (20), for moving, coordinates, and because slide rail (20) is dovetail shape, so after chimeric with dove-tail chute (31), chute (31) is positioned, can only be along slide rail (20) moving linearly.That is square bearing pedestal (26) can only be made linear slide along slide rail (20).It is upper that described slide rail (20) is fixed on slide rail substrate (29), and it is upper that slide rail substrate (29) is fastened on deduster wallboard (33) by trip bolt again, and keep slide rail in vertical direction, so square bearing pedestal (26) can slide up and down in the vertical direction.As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, when square bearing pedestal (26) is done vertical slip, the drive sprocket bearing (6) being attached thereto, axle (22), hydrodynamic reciprocating sealing circle (30), drive sprocket (5) also move up and down thereupon.In the time of drive sprocket (5) and chain (19) link get Tai Song, can be by square bearing pedestal (26) upward sliding, thereby drive drive sprocket (5) to move up, otherwise, when drive sprocket (5) and chain (19) link too tightly, can be by square bearing pedestal (26) down sliding, thus drive drive sprocket (5) to move down.To with time the suitable tightness of chain (19), four threaded adjustment push rods (23) on the push rod pedestal (27) being fixed on slide rail substrate (29) are withstood respectively to square bearing pedestal (26), and will adjust push rod (23) nut (32) screwed in place.Because push rod pedestal (27) is fixed on slide rail substrate (29), and slide rail substrate (29) is also fixed on deduster wallboard (33), therefore, when adjusting push rod (23) and hold out against, square bearing pedestal (26) also adjusted push rod (23) and slide rail (20) is fastened on no longer slip on the position of setting.In order to guarantee that drive sprocket axle (22) can move up and down and can not cause deduster body can not leak out in deduster certain limit, in slide rail substrate (29), deduster wallboard (33) offers the hole (14) that can supply drive sprocket axle (22) axle to move up and down, and on drive sprocket axle (22), be connected with hydrodynamic reciprocating sealing circle (30), seal diameter is (14) footpath much larger than hole, when being enough to meet drive sprocket axle (22) and moving on to high-low limit position, sealing ring can cover aperture all the time, and with corresponding seal approach sealing, as screw in compression, prevent that gas leakage from occurring.So, when chain tightness is inappropriate, can adjust by plain bearing housing (17).This design feature is easy to adjust, reliable.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, all fall among protection scope of the present invention.
Claims (5)
1. a double back turns polar plate electric dust collector, comprise outer case of dust remover (1), stationary electric field (2), revolution electric field (15), ash bucket (12), dust cleaning brush (10), it is characterized in that: described stationary electric field (2) is located at deduster by the front end of air inlet (13), quantity is one or more, and described revolution electric field (15) quantity is two, is located at deduster by the rear end of gas outlet (8).
2. a kind of double back according to claim 1 turns polar plate electric dust collector, it is characterized in that, described revolution electric field consists of some groups of positive plate revolution chain links (7), described ash bucket (12) is located under positive plate revolution chain link (7), the bottom of positive plate revolution chain link (7) is located among ash bucket (12), positive plate revolution chain link (7) is set to electric field region on ash bucket (12), ash bucket is set to non-electric field district among (12), described dust cleaning brush (10) is located in ash bucket (12), every two dust cleaning brushs (10) correspondence be arranged in positive plate revolution chain link (7) positive plate (4) two sides and with positive plate (4) close contact.
3. a kind of double back according to claim 1 turns polar plate electric dust collector, it is characterized in that, described ash bucket (12) mouthful position is provided with and opens and closes interrupter (9), dust cleaning brush (10) is located at and opens and closes under interrupter (9), in the chain (19) and the setting of positive plate (4) intersection that open and close interrupter (9) and positive plate revolution chain link (7), only can allow the hole that the dust of chain (19) and positive plate (4) and absorption passes through.
4. a kind of double back according to claim 1 turns polar plate electric dust collector, it is characterized in that, the power-driven mechanism (3) of described positive plate revolution chain loop device (7) and the power-driven mechanism (11) of dust cleaning brush (10) adopt frequency conversion adjusting device.
5. a kind of double back according to claim 1 turns polar plate electric dust collector, it is characterized in that, the drive sprocket bearing (6) of described positive plate revolution chain link (7) is arranged on plain bearing housing (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310640365.6A CN103611629B (en) | 2013-12-04 | 2013-12-04 | A kind of dual AC power polar plate electric dust collector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310640365.6A CN103611629B (en) | 2013-12-04 | 2013-12-04 | A kind of dual AC power polar plate electric dust collector |
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| CN103611629A true CN103611629A (en) | 2014-03-05 |
| CN103611629B CN103611629B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108816519A (en) * | 2018-07-10 | 2018-11-16 | 浙江菲达环保科技股份有限公司 | A kind of electric precipitator for 1300MW grade extra-supercritical unit |
| CN111871611A (en) * | 2020-08-14 | 2020-11-03 | 马培川 | Dust removal device with air purification, sterilization and disinfection functions and dust removal method |
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| CN111871611A (en) * | 2020-08-14 | 2020-11-03 | 马培川 | Dust removal device with air purification, sterilization and disinfection functions and dust removal method |
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| Publication number | Publication date |
|---|---|
| CN103611629B (en) | 2017-01-04 |
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