CN205269316U - Electrostatic and fabric composite filter - Google Patents

Electrostatic and fabric composite filter Download PDF

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Publication number
CN205269316U
CN205269316U CN201521006953.5U CN201521006953U CN205269316U CN 205269316 U CN205269316 U CN 205269316U CN 201521006953 U CN201521006953 U CN 201521006953U CN 205269316 U CN205269316 U CN 205269316U
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China
Prior art keywords
heat pipe
electric
dust collector
electric field
bag complex
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Active
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CN201521006953.5U
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Chinese (zh)
Inventor
陈奎续
詹永乐
卢宇明
黄志成
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Fujian Longking Co Ltd.
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Fujian Longking Co Ltd.
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Priority to CN201521006953.5U priority Critical patent/CN205269316U/en
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Abstract

The utility model discloses an electrostatic and fabric composite filter, this electrostatic and fabric composite filter include preceding stage electric field district (2), back level dirt pocket district (7) and set up in preceding stage electric field district (2) preceding imported loudspeaker (4), still including the heat transfer device who is used for the flue gas cooling, heat transfer device set up in import loudspeaker (4) later, preceding stage electric field district (2) before. The high temperature flue gas is at first lowered the temperature through heat transfer device, the large granule in the flue gas is filtered in preceding stage electric field district again, after further gathering dust of back level dirt pocket district flow to electrostatic and fabric composite filter's outside after purifying. Heat transfer device sets up after the import loudspeaker, can not influence the diffusion of imported loudspeaker position flue gas, is favorable to the flue gas evenly to spread to electrostatic and fabric composite filter's inside to before heat transfer device was located preceding stage electric field district, heat transfer device can reduce the dust specific resistance to a certain extent, reduces the exhaust gas volumn simultaneously, reduced the electric field wind speed, thereby improved the dust collection efficiency.

Description

A kind of electric-bag complex dust collector
Technical field
The utility model relates to dedusting technology field, in particular to a kind of electric-bag complex dust collector.
Background technology
Along with developing rapidly of modern industry, especially the development of coal-burning power plant, metallurgy, mine, cement and the industry such as chemical industry, casting, causes the severe contamination of China's air, therefore also constrains the development of China's economy. In recent years, particularly seriously PM2.5The various places haze weather that causes of pollution, become urgently to be resolved hurrily now and one of matter of utmost importance of control.
Although electric-bag complex dust collector has been widely used in the discharge of Industrial cleaning facility flue gas, but, there is certain defect in the electric-bag complex dust collector of prior art. Such as, the disadvantage of electric-bag complex dust collector is that traditional filter material works easily oxidation under worst hot case, affects life of bag filter, it is necessary to often change filter bag, it may also be useful to high temperature resistance filtration material cost of investment is relatively high again.
Two kinds are had in order to solve the main mode of method of above-mentioned filtrate high temperature oxidation:
Its one, adopt water spraying atomization heat sink, enter electric-bag complex dust collector with exhaust gas dust after fully mixing after making water fogging. Although playing the effect regulating electric-bag complex dust collector input gas temperature like this, but water loss is big, and the waste of the waste heat of flue gas, cannot again utilize, cause energy loss. And filter bag impact is relatively big, bag easily stuck with paste by filter bag after making moist, cause resistance to increase, and then affect life of bag filter.
Its two, heat-exchanger rig is set in the import loudspeaker position of electric-bag complex dust collector, but import loudspeaker position passage is regular not, and installation and repairing be not easy operation. The more important thing is, acting as of this position makes Flue Gas Diffusion, and the setting of heat-exchanger rig have impact on the diffusion of flue gas, causes the follow-up smoke distribution of electric-bag complex dust collector uneven, greatly affects the dust removing effects of fly-ash separator.
Given this, how getting rid of the impact that high funnel temperature brings, ensure filter bag safe and stable operation, maximumization extends life of bag filter, is both and is down to minimum by boiler exhaust gas thermosteresis, is the problem that those skilled in the art need to solve.
Practical novel content
For the defect of above-mentioned existence, the technical problems to be solved in the utility model is to provide a kind of electric-bag complex dust collector, by the optimization design to fly-ash separator structure, effectively gets rid of the impact that high funnel temperature brings, ensureing filter bag safe and stable operation, maximumization extends life of bag filter.
The electric-bag complex dust collector that the utility model provides, import loudspeaker before comprising prime electric field region, rear class dust settling pocket district and being arranged at described prime electric field region, also comprise the heat-exchanger rig for flue gas cool-down, after described heat-exchanger rig is arranged at described import loudspeaker, before described prime electric field region.
In practical work process, first high-temperature flue gas lowers the temperature through heat-exchanger rig, then filters the macrobead in flue gas through prime electric field region, flow to the outside of electric-bag complex dust collector after the further dust cleaning finally by rear class dust settling pocket district. After heat-exchanger rig is arranged at import loudspeaker, the diffusion of import loudspeaker position flue gas can not be affected, flue gas is conducive to evenly to diffuse to the inside of electric-bag complex dust collector, and before heat-exchanger rig is positioned at prime electric field region, heat-exchanger rig can reduce dust specific resistance to a certain extent, reduce exhaust gas volumn simultaneously, reduce field gas velocity, thus improve efficiency of dust collection.
In addition, before heat-exchanger rig is arranged in prime electric field region, even if leaking in heat-exchanger rig use procedure, the work of electric precipitator is not had an impact by substantially.
Can selection of land, described heat-exchanger rig is heat pipe assembly, and the heat pipe in each described heat pipe assembly is arranged side by side, described in adjacent two heat pipe formed exhaust gases passes, and each described heat pipe assembly formed heat exchange plane orthogonal flow of flue gas direction.
Can selection of land, the quantity of described heat pipe assembly is at least two, is arranged side by side before and after each described heat pipe assembly, and in each described heat pipe assembly heat pipe correspondence arrange.
Can selection of land, described heat-exchanger rig be also provided with further clearly ash parts, for removing the dust on described heat-exchanger rig surface.
Can selection of land, also comprise with lower component:
Flow control component, is arranged at the cooling medium inlet ductwork of described heat pipe assembly, for controlling to flow into cooling medium flow in described heat pipe assembly.
Can selection of land, also comprise with lower component:
Detection part, for detecting described prime electric field region or the current flue-gas temperature of described rear class dust settling pocket district or described electric-bag complex dust collector smoke outlet;
Controller, controls the aperture of described flow control component according to described current flue-gas temperature, so that maintaining in pre-determined range through the flue-gas temperature of described heat-exchanger rig.
Can selection of land, described controller inside also prestores acid dew point numerical value, described controller according to described in the aperture of flow control component described in the acid dew point numerical value that prestores and described current flue-gas temperature Comprehensive Control.
Can selection of land, the aperture of described controller flow control component according to the working parameter of the described electric-bag complex dust collector of its internal receipt and the acid dew point numerical value Comprehensive Control that prestores.
Can selection of land, the working parameter of described electric-bag complex dust collector at least comprises prime electric field region current parameters and voltage parameter, volt-ampere characteristic, inverse corona index and import flue gas pressures parameter, outlet flue gas pressures parameter one or a few person.
Can selection of land, also comprise rear class electric field region, described rear class electric field region is placed in the lower section in described rear class dust settling pocket district
In preferred version of the present utility model, described heat-exchanger rig is heat pipe assembly, and the heat pipe in each described heat pipe assembly is arranged side by side, and heat pipe described in adjacent two forms exhaust gases passes, and the heat exchange plane orthogonal flow of flue gas direction that each described heat pipe assembly is formed.
When above-mentioned electric-bag complex dust collector works, flue gas enters from import loudspeaker, in some passage processes that adjacent heat pipe is formed, heat exchange cooling can be carried out on the one hand with heat pipe, the passage that heat pipe is formed on the other hand is conducive to flue gas even distribution in device interior further, flue gas is evenly flowed into and enters prime electric field region, it is to increase the dust removing effects of prime electric field region, and then improve the dust removing effects of fly-ash separator.
Further, heat pipe assembly is arranged relatively more flexible, especially has important meaning for the fly-ash separator being applied in the flue gas discharge capacity overall situation such as Large-scale fire-electricity unit boiler.
In addition, condition advantageously is provided for improving the filter bag material selection in rear class dust settling pocket district, such that it is able to impel rear class dust settling pocket district to trap fine particle PM efficiently2.5, for reaching country to control fine particle PM2.5Requirement provide guarantee.
Accompanying drawing explanation
Fig. 1 is electric-bag complex dust collector structural representation described in embodiment;
Fig. 2 is the schematic diagram of B to shown heat pipe assembly of Fig. 1;
Fig. 3 is the schematic diagram of A to shown heat pipe assembly of Fig. 1;
Fig. 4 is the sectional view of heat pipe in heat pipe assembly.
In Fig. 1 to 4:
Insulation can 1, prime electric field region 2, heat pipe assembly 3, first heat pipe assembly 31, the 2nd heat pipe assembly 32, the 3rd heat pipe assembly 33, the 4th heat pipe assembly 34, support tube sheet 35, heat pipe 30, shell 301, tube core 302, condensation chamber 303, evaporation cavity 304, import loudspeaker 4, smoke outlet 5, deashing device 6, rear class dust settling pocket district 7, rear class electric field region 8, ash bucket 9, frame 10.
Embodiment
Based on the electric-bag complex dust collector that prior art provides, core of the present utility model is optimized design for its structure and arrangement form, effectively gets rid of the impact that high funnel temperature brings, ensures filter bag safe and stable operation, and maximumization extends life of bag filter.
In order to make those skilled in the art understand the utility model scheme better, below in conjunction with specification drawings and specific embodiments, the utility model is described in further detail.
It is please electric-bag complex dust collector structural representation described in embodiment referring to Fig. 1, Fig. 1 in the lump.
This electric-bag complex dust collector, comprises frame 10 and the prime electric field region 2 being arranged in frame 10, rear class dust settling pocket district 7, import loudspeaker 4, and each parts forming fly-ash separator are mainly played a supportive role by frame, and concrete structure is not described in detail. Before import loudspeaker 4 are arranged at prime electric field region 2, electric-bag complex dust collector herein also comprises the heat-exchanger rig for flue gas cool-down further, and heat-exchanger rig is arranged between prime electric field region 2 and import loudspeaker 4. Namely being provided with heat transfer zone herein between prime electric field region 2 and import loudspeaker 4 specially, heat-exchanger rig is installed on heat transfer zone. That is, when flue gas enters this electric-bag complex dust collector, successively through the filtration, purification effect in import loudspeaker 4, heat-exchanger rig, prime electric field region 2, rear class dust settling pocket district 7, concrete flow of flue gas direction please refer in Fig. 1 shown in arrow.
In practical work process, first high-temperature flue gas lowers the temperature through heat-exchanger rig, then filters the macrobead in flue gas through prime electric field region 2, flow to the outside of electric-bag complex dust collector after the further dust cleaning finally by rear class dust settling pocket district 7. After heat-exchanger rig is arranged at import loudspeaker 4, the diffusion of import loudspeaker 4 position flue gas can not be affected, flue gas is conducive to evenly to diffuse to the inside of electric-bag complex dust collector, and before heat-exchanger rig is positioned at prime electric field region 2, heat-exchanger rig can reduce dust specific resistance to a certain extent, reduce exhaust gas volumn simultaneously, reduce field gas velocity, thus improve efficiency of dust collection.
In addition, before heat-exchanger rig is arranged in prime electric field region 2, even if leaking in heat-exchanger rig use procedure, the work of electric precipitator is not had an impact by substantially.
Please refer to Fig. 2 to Fig. 4, Fig. 2 is the schematic diagram of B to shown heat pipe assembly of Fig. 1; Fig. 3 is the schematic diagram of A to shown heat pipe assembly of Fig. 1; Fig. 4 is the sectional view of heat pipe in heat pipe assembly.
Above-mentioned heat-exchanger rig can be heat pipe assembly 3, naturally it is also possible to be other forms, such as metal tube etc. Heat pipe 30 is a kind of thermal conduction artificial component preferably, please refer to Fig. 4, conventional heat pipe 30 is made up of three parts: main body is a closed metal tube (shell 301), having a small amount of working medium (working fluid) and capillary structure (tube core 302) in internal cavities, air and foreign material thereof in shell 301 must be got rid of in outside. Heat pipe 30 make use of three kinds of physics principles when working: the first, under vacuum conditions, and the boiling point of liquid reduces; Two, the latent heat of vaporization of material of the same race is more much higher than aobvious heat; Three, the suction power of liquid can be made liquid-flow by porous capillary structure. Specifically, above-mentioned heat pipe 30 can also be gravity heat pipe, and the bottom of heat pipe 30 is evaporation cavity 304, and top is condensation chamber 303. This paper is that heat pipe assembly 3 continues to introduce technical scheme for example taking heat-exchanger rig.
In a kind of embodiment, each heat pipe 30 in heat pipe assembly 3 is arranged side by side, and forms assembly by supporting tube sheet 35, and adjacent two heat pipes 30 form exhaust gases passes, and the heat exchange plane orthogonal flow of flue gas direction that heat pipe assembly 3 is formed. Specifically, each heat pipe 30 in heat pipe assembly 3 can vertically be arranged, it is also possible to horizontal arrangement, and wherein in Fig. 1, heat pipe 30 is vertically arranged, forms the flue vertically extended. For flue gas from from left to right horizontal flow, heat pipe assembly 3 is vertically placed.
When above-mentioned electric-bag complex dust collector works, flue gas enters from import loudspeaker 4, in some passage processes that adjacent heat pipe 30 is formed, heat exchange cooling can be carried out on the one hand with heat pipe 30, the passage that heat pipe 30 is formed on the other hand is conducive to flue gas even distribution in device interior further, flue gas is evenly flowed into and enters prime electric field region 2, it is to increase the dust removing effects of prime electric field region 2, and then improve the dust removing effects of fly-ash separator.
Further, heat pipe assembly 3 is arranged relatively more flexible, especially has important meaning for the fly-ash separator being applied in the flue gas discharge capacity overall situation such as Large-scale fire-electricity unit boiler.
In addition, condition advantageously is provided for improving the filter bag material selection in rear class dust settling pocket district 7, such that it is able to impel rear class dust settling pocket district 7 to trap fine particle PM efficiently2.5, for reaching country to control fine particle PM2.5Requirement provide guarantee.
Each heat pipe 30 in above-described embodiment can be relatively independent, and a breakage can not affect other heat pipe 30 disablers, and de-mineralized water can not be caused to reveal, also without the need to repairing in operational process. And heat pipe 30 indirect heat transfer, DW system demineralized water system is installed on flue outside, and flue, without the need to de-mineralized water, is eliminated de-mineralized water pipeline burst, revealed matters. Comparing, the serpentine tubes such as conventional H type extended surface tube, helical fin pipe have advantage.
Flue gas heat exchange demand according to electric-bag complex dust collector, when flue-gas temperature is higher, when required heat is bigger, electric-bag complex dust collector can install two or more heat pipe assembly 3, having illustrated the embodiment of four heat pipe assembly 3 in Fig. 2, four heat pipe assembly 3 are respectively: the first heat pipe assembly 31, the 2nd heat pipe assembly 32, the 3rd heat pipe assembly 33, the 4th heat pipe assembly 34. Each heat pipe assembly 3 can take before and after the form that is arranged side by side, in each row's heat pipe assembly 3, heat pipe 30 correspondence is arranged. That is, the flue that in the heat pipe assembly 3 that front and back are arranged, adjacent heat pipe 30 is formed is between identical two vertical planes or horizontal plane, flue gas is conducive to smoothly pass each heat pipe assembly 3, reduce many group heat pipe assembly 3 as far as possible and the interference to flow of flue gas is set, be conducive to flue gas evenly to enter prime electric field region 2.
In order to realize the Automated condtrol of electric-bag complex dust collector, electric-bag complex dust collector in the various embodiments described above can further include flow control component, detection part, controller, flow control component, the cooling medium inlet ductwork being arranged at heat pipe assembly 3, flows into cooling medium flow in heat pipe assembly 3 for controlling; Detection part, for detecting prime electric field region 2 or the current flue-gas temperature of described rear class dust settling pocket district 7 or described electric-bag complex dust collector smoke outlet 5; For electric-bag complex dust collector, the temperature of prime electric field region 2, rear class dust settling pocket district 7, smoke outlet 5 three's flue gas is substantially identical, it is possible to according to device interior spatial arrangement situation, selects correct position to carry out installing detection part. Detection part can be the parts such as temperature sensor.
Controller controls the aperture of flow control component according to current flue-gas temperature, so that maintaining in pre-determined range through the flue-gas temperature of heat-exchanger rig.
Specifically, controller inside can prestore a standard fume temperature, the more current flue-gas temperature of controller and standard fume temperature, when current flue-gas temperature is higher than standard fume temperature pre-determined range, increases the aperture of flow control component; When current flue-gas temperature is lower than standard fume temperature pre-determined range, reduce the aperture of flow control component.
Above-mentioned flow control component can be flowrate control valve, it is possible to think freq uency conversion supercharging pump. Controller, according to the detection signal of detection part, the valve port opening of control flow check control valve or the frequency of freq uency conversion supercharging pump, reaches the object that control flows into cooling medium flow in heat pipe assembly 3.
It is not limited to above-mentioned for flow control component aperture adjusting condition, it is also possible to take following means.
In the 2nd kind of embodiment, controller inside can also prestore acid dew point numerical value, and this acid dew point refers to the acid dew point of the flue gas before entering fly-ash separator, it is possible to is undertaken gathering by special instrument component and transfers to controller. Controller is according to the aperture of the acid dew point numerical value prestored and current flue-gas temperature Comprehensive Control flow control component.
In the third embodiment, controller is according to the aperture of the working parameter of the electric-bag complex dust collector of its internal receipt with flow control component described in the acid dew point numerical value Comprehensive Control prestored. The working parameter of electric-bag complex dust collector at least comprises prime electric field region 2 current parameters and voltage parameter, volt-ampere characteristic, inverse corona index and import flue gas pressures parameter, smoke outlet flue gas pressures parameter one or a few person. Certainly, working parameter can also be other numerical value, does not enumerate at this.
This enforcement mode fully considers that the serviceability of each parts of electric-bag complex dust collector regulates the flow flowing into cooling medium in heat pipe assembly 3, so that each parts reach preferably working order, the overall dust removal performance of raising equipment, avoid considering single factors, cause the generation of other component working penalty phenomenons of fly-ash separator.
Meanwhile, above-mentioned rear class dust settling pocket district 7 arranges the filter bag of vertical direction, and that is, the axis direction being in the filter bag in rear class dust settling pocket district 7 is perpendicular to flow of flue gas direction layout. The lower section in rear class dust settling pocket district 7 can also arrange rear class electric field region 8, eliminates the waste that the form that is arranged vertically brings the big quantity space of filter bag bottom, adequately and reasonably make use of the space of this electric-bag complex dust collector; In addition, additionally it is possible to adopt shorter filter bag so that the compact construction of electric-bag complex dust collector, save filtrate, reduce costs; The arrangement form of this kind of filter bag impels easy for installation, overhauls simple to operate.
It should be noted that, above-mentioned filter bag should require planning filtration area according to the degree of purification that need to arrive when the content of dust in concrete flue gas and filtration, and selects the model of filtrate, repeats no more herein.
In use for some time, dust will inevitably be adhered in its surface to heat-exchanger rig, and in order to not reduce the heat exchange efficiency of heat-exchanger rig, heat-exchanger rig is also provided with ash parts clearly further, for removing the dust on described heat-exchanger rig surface. Clear ash parts can be sound wave ashing parts, it is possible to thinks that liquid spraying cleans. Particular type according to clear ash parts is selected reasonably to install position at device interior and is installed.
In addition, the smoke outlet in rear class dust settling pocket district 7 can arrange the deashing device 6 covering whole filter bag, deashing device can be pulse ash remover, when this electric-bag complex dust collector is after a large amount of dedustings works, its attached dust in surface is cleared up by this pulse ash remover, makes it to fall into device for recovering powder. Like this, efficiency of dust collection and the work-ing life thereof of filter bag can greatly be improved, it is ensured that electric-bag complex dust collector high-level efficiency completes dedusting work.
Please referring again to Fig. 1, electric-bag complex dust collector can also arrange ash bucket 9 further below heat-exchanger rig, prime electric field region 2, rear class dust settling pocket district 7, for the dust collected in flue gas. In addition, electric-bag complex dust collector can also arrange insulation can 1 at the apparatus casing top of corresponding prime electric field region 2 and rear class dust settling pocket district 7 further.
Above electric-bag complex dust collector provided by the utility model is described in detail. Only having set forth for concrete example of the present utility model herein, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping. It is noted that for those skilled in the art, under the prerequisite not departing from the utility model feature, it is also possible to make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (10)

1. an electric-bag complex dust collector, comprise prime electric field region (2), rear class dust settling pocket district (7) and it is arranged at the front import loudspeaker (4) of described prime electric field region (2), it is characterized in that, also comprise the heat-exchanger rig for flue gas cool-down, after described heat-exchanger rig is arranged at described import loudspeaker (4), before described prime electric field region (2).
2. electric-bag complex dust collector according to claim 1, it is characterized in that, described heat-exchanger rig is heat pipe assembly (3), heat pipe (30) in each described heat pipe assembly (3) is arranged side by side, heat pipe (30) described in adjacent two forms exhaust gases passes, and the heat exchange plane orthogonal flow of flue gas direction that each described heat pipe assembly (3) is formed.
3. electric-bag complex dust collector according to claim 2, it is characterized in that, the quantity of described heat pipe assembly (3) is at least two, is arranged side by side before and after each described heat pipe assembly (3), and in each described heat pipe assembly (3), heat pipe correspondence is arranged.
4. electric-bag complex dust collector according to claim 1, it is characterised in that, described heat-exchanger rig is also provided with ash parts clearly further, for removing the dust on described heat-exchanger rig surface.
5. electric-bag complex dust collector according to the arbitrary item of claim 2 to 3, it is characterised in that, also comprise with lower component:
Flow control component, is arranged at the cooling medium inlet ductwork of described heat pipe assembly (3), flows into cooling medium flow in described heat pipe assembly (3) for controlling.
6. electric-bag complex dust collector according to claim 5, it is characterised in that, also comprise with lower component:
Detection part, for detecting described prime electric field region (2) or the current flue-gas temperature of described rear class dust settling pocket district (7) or described electric-bag complex dust collector smoke outlet (5);
Controller, controls the aperture of described flow control component according to described current flue-gas temperature, so that maintaining in pre-determined range through the flue-gas temperature of described heat-exchanger rig.
7. electric-bag complex dust collector according to claim 6, it is characterized in that, described controller inside also prestores acid dew point numerical value, described controller according to described in the aperture of flow control component described in the acid dew point numerical value that prestores and described current flue-gas temperature Comprehensive Control.
8. electric-bag complex dust collector according to claim 6, it is characterised in that, described controller is according to the aperture of the working parameter of the described electric-bag complex dust collector of its internal receipt with flow control component described in the acid dew point numerical value Comprehensive Control prestored.
9. electric-bag complex dust collector according to claim 8, it is characterized in that, the working parameter of described electric-bag complex dust collector at least comprises prime electric field region (2) current parameters and voltage parameter, volt-ampere characteristic, inverse corona index and import flue gas pressures parameter, outlet flue gas pressures parameter one or a few person.
10. electric-bag complex dust collector according to claim 1, it is characterised in that, also comprise rear class electric field region (8), described rear class electric field region (8) is placed in the lower section of described rear class dust settling pocket district (7).
CN201521006953.5U 2015-11-27 2015-11-27 Electrostatic and fabric composite filter Active CN205269316U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521006953.5U CN205269316U (en) 2015-11-27 2015-11-27 Electrostatic and fabric composite filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521006953.5U CN205269316U (en) 2015-11-27 2015-11-27 Electrostatic and fabric composite filter

Publications (1)

Publication Number Publication Date
CN205269316U true CN205269316U (en) 2016-06-01

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CN201521006953.5U Active CN205269316U (en) 2015-11-27 2015-11-27 Electrostatic and fabric composite filter

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112057970A (en) * 2020-09-08 2020-12-11 安徽智宇环保滤材有限公司 Cleaning and maintaining device for dust removal filter bag
CN115007314A (en) * 2022-05-30 2022-09-06 福建龙净环保股份有限公司 Coupling reinforcing electric bag composite dust removal device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112057970A (en) * 2020-09-08 2020-12-11 安徽智宇环保滤材有限公司 Cleaning and maintaining device for dust removal filter bag
CN115007314A (en) * 2022-05-30 2022-09-06 福建龙净环保股份有限公司 Coupling reinforcing electric bag composite dust removal device

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