CN202570412U - Cleaning device of pollution flashover resistant porcelain insulators for electrostatic dust collector - Google Patents
Cleaning device of pollution flashover resistant porcelain insulators for electrostatic dust collector Download PDFInfo
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- CN202570412U CN202570412U CN 201220117545 CN201220117545U CN202570412U CN 202570412 U CN202570412 U CN 202570412U CN 201220117545 CN201220117545 CN 201220117545 CN 201220117545 U CN201220117545 U CN 201220117545U CN 202570412 U CN202570412 U CN 202570412U
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Abstract
The utility model relates to a cleaning device of pollution flashover resistant porcelain insulators for an electrostatic dust collector. The cleaning device comprises a stopping plate, a base and a buffering cover which are arranged from top to bottom, the appearance of the base is annular, the base comprises an inside cavity, an air inlet and an air outlet, the air outlet is arranged on the upper surface of the base and communicated with the inside cavity, and the air inlet is arranged on an annular outer wall of the base and communicated with the inside cavity. The external diameter of the stopping plate is larger than or equal to the external diameter of upper edges of the porcelain insulators. The external diameter of the base is larger than or equal to the external diameter of lower edges of the porcelain insulators, and the air outlet is opposite to lower holes of the porcelain insulators. The buffering cover is arranged on the lower surface of the base, the buffering cover and the base are coaxially arranged, and the diameter of an upper edge of the buffering cover is larger than or equal to the internal diameter of the base. The cleaning device blocks dirty and wet objects out of the porcelain insulators, prolongs operational cycle of the electrostatic dust collector, fundamentally avoids pollution flashover of the porcelain insulators for an electrostatic dust collector and reduces maintenance frequency.
Description
Technical field
The utility model relates to the cleaning device of a kind of electrostatic precipitator with anti-pollution flashover porcelain insulator, belongs to the technical field of electrostatic precipitator with the anti-pollution flashover of porcelain insulator.
Background technology
Electrostatic precipitator is a kind of high-effective dust-removing equipment that is used for the captured gas fine solid particle, and it is to utilize electrostatic force to realize solid-state or liquid particle and flow separation, thus the device that ash-laden gas is purified.When applying with HVDC electric forming electric field between discharge electrode of arranging at the electric cleaner internal interval and the dust collector pole, keep a space that is enough to make gas ionization, the gas around discharge electrode will be formed gas ion and electronics by ionization.When dusty gas when the electric field, ion and electronics make it charged attached to the powder dust particle surface at the volley, charged particle moves and is deposited on the dust collector pole to dust collector pole under the effect of electric field force, thereby reaches the purpose of powder dust particle and flow separation.When the dust layer on the dust collector pole reaches certain thickness, fall under gravity into ash bucket.
Electrostatic precipitator has advantages such as arresting efficiency height, drag losses is little, the gas treatment amount is big; Be applicable to the operating mode of high temperature, high dust content, big exhaust gas volumn, industries such as coal-burning boiler, cement plant rotary kiln and metallurgy, petrochemical industry are used widely in the thermal power plant.
Electrostatic precipitator is used for corona discharge electrode hanging frame suspension rod and passes the sealing at housing place and an insulation protection with porcelain insulator-electroceramics sleeve.Profile according to product is divided into straight type electroceramics sleeve and tapered electroceramics sleeve and special-shaped electroceramics sleeve.Electroceramics hub insulation is made in strict accordance with GB772-87 " high tension insulator porcelain spare technical conditions " and B/T6746.3-93 " electrostatic precipitator is with porcelain insulator-electroceramics insulator ".Be applicable to that operating temperature is no more than 250 ℃, direct-current working volts 72kV～120kV, resistance to compression destroys load and is not less than 500kN, and the infield height above sea level is no more than 1000 meters working environment.The electroceramics sleeve outer surface is executed white or brown enamel, and both ends of the surface are ground.
High-voltage electrostatic dust separator in operation is used porcelain insulator, receives the pollution of surrounding environment, and the surface can deposit one deck dunghill gradually.When meeting with wet environment; Can form moisture film at insulator surface, but the lava class in the pollution layer can be soluble in water, thereby form the moisture film of conduction; The surface current mistake of Leakage Current along insulator so just arranged; And different because of degree of fouling and the degree of making moist, make the electric current and the voltage skewness of insulator surface, wherein dry zone is born higher voltage.When electric-field intensity is enough big, cross over the creeping discharge of doing the district with producing, electric discharge type possibly be glow discharge, spark discharge or produce local arc.Local arc is the discharge process at an intermittence, and the discharge condition at this intermittence possibly continue the long duration, and when dirty and dampness were serious, local arc can progressively develop; When reaching and surpass critical condition, electric arc can run through the two poles of the earth, accomplishes flashover, needs the maintenance of stopping transport, and is bigger to the ordinary production influence.
The pollution flashover of insulation is the acting in conjunction of dirty moisture performance and the result that produces.If make one of them improvement of terms or be false, will solve the pollution flashover problem largely.At present, the conventional way of electrostatic precipitator manufacturer is, with high voltage insulating materials sealing or semi-hermetic, and the protective cover or the electric panel room of dustproof, rainproof and security protection effect is installed in electroceramics sleeve and overhung construction outside to electroceramics sleeve upper end.Owing to must leave enough discharging gaps between a suspension rod and a housing and between a dust cover and a housing; Receive the influence of negative pressure fluctuation in the electric field; The dirty wet flue gas of part still can be got in the electroceramics sleeve by panting inevitably, causes electroceramics surface contamination insulation to reduce, and emotionally condition is different with suction wave according to process conditions; Just needed the stoppage in transit electrical tar precipitator to carry out the electroceramics sleeve in general 10～30 days and clean or change, so the continuous cycle of operation of equipment is short, maintenance workload is big, cost is high.
Way after the improvement has: the producer that has leaves two clean-out hatch in order effectively to avoid the generation of pollution flashover phenomenon on the insulator upper end cover, during the operation of deduster negative pressure; Ability inspiration clean air forms air-flow, and inwall is cleaned; Or check that inwall pollutes, utilize this hole to carry out hand sweeping.Air-flow that gets into by clean-out hatch or the inner suction function of deduster prevent pollution flashover, but the air-flow that gets into through clean-out hatch part in porcelain insulator inwall or cavity has formed malleation, and most of zone still is in negative pressure state; Simultaneously; Owing to must leave enough discharging gaps between a suspension rod and a housing and between a dust cover and a housing; Receive the influence of negative pressure fluctuation in the electric field, the dirty wet flue gas of part still can be got in the electroceramics sleeve by panting inevitably, thereby; And fail pollution flashover source-dirty wet flue gas is blocked in outside the porcelain insulator, operational effect does not have obvious improvement.
Way after further improving is: certain company introduces the electric cleaner of the U.S., leaves the hole of three inclinations in the above, and connect blower fan formation rotation wind with pipeline and force to purge the insulator inwall, the effect highly significant, the continuous cycle of operation of equipment improves greatly.But, have bigger potential safety hazard, because the about 350mm of diameter above the electroceramics sleeve; Circle centre position is that voltage is up to the negative electrode suspension rod more than the 72kV; After top perforate connected Fan pipeline, pipeline outer wall to high pressure negative electrode suspension rod was apart from about 100mm, and (creepage ratio is apart from the minimum requirements of 15.5mm/kV * 72kV) to be far smaller than electric creep age distance 1116mm; Even Fan pipeline adopts insulating materials to make; Under the dirty wet condition of high voltage and running environment, still exist the electrion flashover to cause blower fan to burn, even high-tension electricity is scurried into low-pressure system and is caused the superpotential risk of system.
Simultaneously; No matter blower fan is blown into is still leaned on negative pressure to suck the air cleaner sleeve inner; All do not consider the problem of domestic industry district air quality; The pollutants such as particle steam that air itself is brought into after operation a period of time still can cause sleeve surface to pollute, and can't fundamentally solve the problem of pollution flashover.
Summary of the invention
Deficiency to prior art; The utility model provides the cleaning device of a kind of electrostatic precipitator with anti-pollution flashover porcelain insulator; This device is blocked in the wet thing of dirt outside the porcelain insulator, prolongs the cycle of operation of electrostatic precipitator, has reduced the influence to producing; Fundamentally prevent the generation of electrostatic precipitator, reduce frequency of maintenance with porcelain insulator pollution flashover phenomenon.
The technical scheme of the utility model is following:
A kind of electrostatic precipitator is with the cleaning device of anti-pollution flashover porcelain insulator; Comprise the baffle plate, base and the impact-absorbing shell that from top to bottom are provided with; Described base profile ringwise; Said base comprises internal cavities, air inlet and gas outlet, and said gas outlet is arranged on the upper surface of base, and is connected with internal cavities; Said air inlet is arranged on the annular outer wall of base, and is connected with internal cavities; The external diameter of said baffle plate is more than or equal to the top edge external diameter of porcelain insulator; Said base external diameter is more than or equal to porcelain insulator lower limb external diameter, and the following hole of said gas outlet and porcelain insulator is relative; Described base lower surface is provided with impact-absorbing shell, impact-absorbing shell and the coaxial setting of base, and the diameter of impact-absorbing shell top edge is more than or equal to the internal diameter of base.
The quantity of said gas outlet is a plurality of, the rounded upper surface that is arranged in base.
Preferably, said gas outlet is arranged out circular diameter and is less than or equal to porcelain insulator lower limb internal diameter.
Described gas outlet is circular gas outlet.
The inwall of said gas outlet axis and porcelain insulator parallels.
Preferred according to the utility model, the material of said baffle plate is an epoxy resin.
Said impact-absorbing shell is a tubular.
Said impact-absorbing shell is an inverted tubaeform, and the diameter of impact-absorbing shell top edge is less than the diameter of impact-absorbing shell lower limb.
The applying step of the utility model is following:
The top edge sealing of baffle plate and porcelain insulator is installed; The lower limb sealing of base and porcelain insulator is installed, make the following hole of said gas outlet and porcelain insulator relative; Pressure-air upwards sprays into porcelain insulator inside along air inlet, base internal cavities and gas outlet along the porcelain insulator inwall, receives oppositely stopping of upper guard-plate, and final air-flow axially evenly flows out this cleaning device through base, impact-absorbing shell downwards along porcelain insulator.It is inner that described pressure-air gets into porcelain insulator, forms positive air pressure, not only hinders dirty humid air entering porcelain insulator inside in the electrostatic precipitator field; And can original dirty dirt that is trapped on the insulator inwall be blown off, finally derive along the annular inner wall of annular base.Said baffle plate is installed through the top edge sealing of asbestos pad and porcelain insulator; Said base is installed through the lower limb sealing of asbestos pad and porcelain insulator.
The advantage of the utility model is:
The utility model is installed between electrostatic dust collector cathode flap seat and the suspension rod, when electrostatic precipitator is carried out work, the hemi-closure space that baffle plate, porcelain insulator and base surrounded; The air inlet of base links to each other with the external high pressure source of the gas, and pressure-air gets into porcelain insulator inside along air inlet, gas outlet, upwards blows to electrostatic precipitator and uses the porcelain insulator inwall; Under the reaction force of porcelain insulator upper guard-plate, blow out porcelain insulator then downwards; Delay the fluctuate panting of dirty humid gas of negative pressure through the current-sharing effect of impact-absorbing shell again, so just in porcelain insulator, formed the air curtain of certain malleation, hindered the invasion and attack entering of dirty wet flue gas; Thereby the cleaning that has kept the porcelain insulator inwall; Guaranteed the insulating properties of electrostatic precipitator, prolonged the cycle of operation, improved guarantee coefficient producing with porcelain insulator.The utility model porcelain insulator is suitable for reading airtight, sets up cloth wind supercharging ring (being base) below the porcelain insulator, and base is set up impact-absorbing shell down to electric field; Pressure-air is blown into through base forces purging porcelain insulator inwall to make it to keep clean in the porcelain insulator, porcelain insulator is interior simultaneously forms tangible zone of positive pressure, buffer area and negative pressuren zone step by step down to electric field inside, fundamentally solves the problem of pollution flashover.And below porcelain insulator, set up base and device housings body equipotential, the generation of having stopped electric flashover risk accidents.
Description of drawings
Fig. 1 is the application structure sketch map of the utility model;
Fig. 2 is the vertical view of base described in the utility model;
Fig. 3 is the three-dimensional structure diagram of base described in the utility model;
In Fig. 1-3,1. baffle plate; 2. base; 2-1. gas outlet; 2-2. air inlet; 2-3. annular outer wall; 2-4. annular inner wall; 2-5. base internal diameter; 2-6. base external diameter; 3. porcelain insulator; 3-1. porcelain insulator top edge; 3-2. porcelain insulator lower limb; 4. impact-absorbing shell; 4-1. impact-absorbing shell top edge diameter; 5. the hanging beam of electrostatic precipitator; 6. the suspension rod of electrostatic precipitator; 7. the insulator of electrostatic precipitator; 8. the negative electrode flap seat of electrostatic precipitator.Wherein L is the axis of gas outlet; R is the round diameter that arrange out said gas outlet.
The specific embodiment
Below in conjunction with embodiment and Figure of description the utility model is done detailed explanation, but be not limited thereto.
Embodiment 1,
Shown in Fig. 1-3, the utility model is installed on the porcelain insulator of electrostatic precipitator, the specification of porcelain insulator described herein is: top edge external diameter 270mm, top edge internal diameter 215mm; Lower limb external diameter 450mm, lower limb internal diameter 390mm; The high 400mm of porcelain insulator.
Annular base 2 upper surfaces are provided with 300 circular gas outlet 2-1, rounded arrangement, and the round diameter R that said gas outlet 2-1 is arranged out is 380mm; The diameter 1mm of circular gas outlet 2-1, the pressure of pressure-air is 0.2～0.7Mpa, flow is 0.5～1.0m
3/ min.
A kind of electrostatic precipitator comprises the baffle plate 1, base 2 and the impact-absorbing shell 4 that from top to bottom are provided with the cleaning device of anti-pollution flashover porcelain insulator, described base 2 profiles ringwise, said baffle plate 1 is the epoxy resin material.Said base 2 comprises internal cavities, air inlet 2-2 and gas outlet 2-1, and said gas outlet 2-1 is arranged on the upper surface of base 2, and is connected with internal cavities; Said air inlet 2-2 is arranged on the annular outer wall 2-3 of base, and is connected with internal cavities; The external diameter of said baffle plate 1 equals the top edge 3-1 external diameter of porcelain insulator; Said base external diameter 2-6 is greater than porcelain insulator lower limb 3-2 external diameter, and the following hole of said gas outlet 2-1 and porcelain insulator is relative.Described base lower surface is provided with impact-absorbing shell 4, impact-absorbing shell 4 and base 2 coaxial settings, and the diameter 4-1 of impact-absorbing shell 4 top edges is greater than the internal diameter 2-5 of base, and said impact-absorbing shell 4 is a tubular.The inwall of said gas outlet axis L and porcelain insulator 3 parallels.
Embodiment 2,
Like embodiment 1 described cleaning device, its difference is: said impact-absorbing shell 4 is inverted tubaeform, and the diameter of impact-absorbing shell top edge is less than the diameter of impact-absorbing shell lower limb.
Claims (7)
1. an electrostatic precipitator is with the cleaning device of preventing the pollution flashover porcelain insulator; It is characterized in that; It comprises from top to bottom baffle plate, base and the impact-absorbing shell that is provided with, described base profile ringwise, said base comprises internal cavities, air inlet and gas outlet; Said gas outlet is arranged on the upper surface of base, and is connected with internal cavities; Said air inlet is arranged on the annular outer wall of base, and is connected with internal cavities; The external diameter of said baffle plate is more than or equal to the top edge external diameter of porcelain insulator; Said base external diameter is more than or equal to porcelain insulator lower limb external diameter, and the following hole of said gas outlet and porcelain insulator is relative; Described base lower surface is provided with impact-absorbing shell, impact-absorbing shell and the coaxial setting of base, and the diameter of impact-absorbing shell top edge is more than or equal to the internal diameter of base.
2. a kind of electrostatic precipitator according to claim 1 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator said gas outlet is circular, and the quantity of said gas outlet is a plurality of, the rounded upper surface that is arranged in base.
3. a kind of electrostatic precipitator according to claim 2 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator said gas outlet is arranged out circular diameter and is less than or equal to porcelain insulator lower limb internal diameter.
4. a kind of electrostatic precipitator according to claim 2 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator the inwall of said gas outlet axis and porcelain insulator parallels.
5. a kind of electrostatic precipitator according to claim 1 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator the material of said baffle plate is an epoxy resin.
6. a kind of electrostatic precipitator according to claim 1 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator said impact-absorbing shell is a tubular.
7. a kind of electrostatic precipitator according to claim 1 is characterized in that with the cleaning device of anti-pollution flashover porcelain insulator said impact-absorbing shell is an inverted tubaeform, and the diameter of impact-absorbing shell top edge is less than the diameter of impact-absorbing shell lower limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220117545 CN202570412U (en) | 2012-03-26 | 2012-03-26 | Cleaning device of pollution flashover resistant porcelain insulators for electrostatic dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220117545 CN202570412U (en) | 2012-03-26 | 2012-03-26 | Cleaning device of pollution flashover resistant porcelain insulators for electrostatic dust collector |
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| CN202570412U true CN202570412U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220117545 Expired - Fee Related CN202570412U (en) | 2012-03-26 | 2012-03-26 | Cleaning device of pollution flashover resistant porcelain insulators for electrostatic dust collector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614988A (en) * | 2012-03-26 | 2012-08-01 | 兖矿集团有限公司 | Cleaning device for pollution flashover preventive porcelain insulator for electrostatic dust collector and application of cleaning device |
| CN104689919A (en) * | 2014-12-30 | 2015-06-10 | 浙江南源环境工程技术有限公司 | Air sealing system device for wet electrical dust precipitator insulator compartment |
| CN104984831A (en) * | 2015-07-17 | 2015-10-21 | 中国重型机械研究院股份公司 | Hot air sealing venturi dustproof cover for electric dust collector insulating piece |
-
2012
- 2012-03-26 CN CN 201220117545 patent/CN202570412U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614988A (en) * | 2012-03-26 | 2012-08-01 | 兖矿集团有限公司 | Cleaning device for pollution flashover preventive porcelain insulator for electrostatic dust collector and application of cleaning device |
| CN102614988B (en) * | 2012-03-26 | 2014-06-11 | 兖矿集团有限公司 | Cleaning device for pollution flashover preventive porcelain insulator for electrostatic dust collector and application of cleaning device |
| CN104689919A (en) * | 2014-12-30 | 2015-06-10 | 浙江南源环境工程技术有限公司 | Air sealing system device for wet electrical dust precipitator insulator compartment |
| CN104984831A (en) * | 2015-07-17 | 2015-10-21 | 中国重型机械研究院股份公司 | Hot air sealing venturi dustproof cover for electric dust collector insulating piece |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130326 |