CN111871610A

CN111871610A - Vertical electrostatic fabric filter

Info

Publication number: CN111871610A
Application number: CN202010867938.9A
Authority: CN
Inventors: 任俊; 任刚; 殷鹏
Original assignee: Chongqing Biwei Environmental Protection Engineering Equipment Co ltd
Current assignee: Chongqing Biwei Environmental Protection Engineering Equipment Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2020-11-03

Abstract

The invention relates to the technical field of dust removal, in particular to a vertical electrostatic fabric filter. Comprises an air inlet pipe, an air outlet pipe and a cloth bag dust removal device; the device also comprises an electric field outer cylinder, an electric field inner cylinder positioned in the electric field outer cylinder, a cathode wire arranged between the electric field outer cylinder and the electric field inner cylinder, a power supply device for supplying power to the cathode wire and the peripheral wall of the electric field inner cylinder, and a dust deposition part communicated with the electric field outer cylinder and the electric field inner cylinder; the electric field outer barrel is communicated with the electric field inner barrel, the electric field outer barrel is communicated with the air inlet pipe, and a cloth bag dust removal device is arranged in the electric field inner barrel and is communicated with the air outlet pipe. Compared with the prior art, the dust-containing flue gas can fully stay in the electric field and then enters the cloth bag dust removal device in the electric field inner cylinder for dust removal, the dust removal pressure of cloth bag dust removal is reduced, the dust removal efficiency and the dust removal effect are improved, and the occupied area of the device is small.

Description

Vertical electrostatic fabric filter

Technical Field

The invention relates to the technical field of dust removal, in particular to a vertical electrostatic fabric filter.

Background

With the rapid development of modern industries, especially the development of coal-fired power plants, metallurgy, mines, cement, chemical industry, casting and other industries, serious pollution to the atmosphere in China is caused, so that the development of economy in China is restricted. Atmospheric pollution can have serious effects on human health and environmental health.

In the field of dust removal, although electric-bag composite dust collectors have been widely used for discharging industrial purified flue gas, an electric dust removal area has a preceding-stage electric field, and a bag dust removal area has a filter bag. One part of the electric charge of the flue gas passing through the electric dust removal area is trapped in a front-stage electric field, and the other part of the electric charge continuously flows to the filter bag and is filtered by the filter bag. Although the dust removal efficiency of the electric-bag composite dust remover is improved compared with that of a bag dust remover, the electric-bag composite dust remover in the prior art has certain defects. For example, when the existing electrostatic fabric filter filters high-concentration and high-flow-rate flue gas, the flue gas cannot be fully captured by the front-stage electric field and flows to the filter bag, the filtering capacity of the filter bag is limited, the high-efficiency dust collection effect cannot be achieved, the general floor area of the existing electrostatic fabric filter is too large, and the industrial cost can be increased. In view of the above problems, the electrostatic and fabric composite precipitator needs to be improved, so as to improve the dust removal efficiency and effect of the electrostatic and fabric composite precipitator, reduce the industrial cost, and meet the requirements of modern industry on economy, energy conservation and environmental protection.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a vertical electrostatic fabric filter, which solves the problems of low dust removal efficiency, poor dust removal effect and overlarge occupied area in the prior art.

According to the embodiment of the invention, the vertical electric-bag composite dust remover comprises an air inlet pipe, an air outlet pipe and a bag dust removing device; the device also comprises an electric field outer cylinder, an electric field inner cylinder positioned in the electric field outer cylinder, a cathode wire arranged between the electric field outer cylinder and the electric field inner cylinder, a power supply device for supplying power to the cathode wire and the peripheral wall of the electric field inner cylinder, and a dust deposition part communicated with the electric field outer cylinder and the electric field inner cylinder;

the electric field outer barrel is communicated with the electric field inner barrel, the electric field outer barrel is communicated with the air inlet pipe, and a cloth bag dust removal device is arranged in the electric field inner barrel and is communicated with the air outlet pipe.

The technical principle of the invention is as follows: the dusty flue gas passes through the air-supply line and gets into between electric field urceolus and the electric field inner tube, and power supply unit forms the electric field to negative pole line and electric field inner tube perisporium power supply, and most dust is collected between the urceolus including under the effect of electric field in the flue gas, and remaining part gets into the electric field inner tube and passes through the play tuber pipe after cloth bag dust collector's filtration and discharge.

Compared with the prior art, the invention has the following beneficial effects: compared with the prior art, the dust-containing flue gas can fully stay in the electric field and then enters the cloth bag dust removal device in the electric field inner cylinder to remove dust, the dust removal pressure of cloth bag dust removal is reduced, the dust removal efficiency and the dust removal effect are improved, the cloth bag dust removal device is arranged in the electric field in the arrangement mode of the structure, the two parts of electricity and bags are arranged together, and the occupied area of the device can be reduced.

Drawings

Fig. 1 is a schematic structural view of a vertical electrostatic fabric filter device according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Fig. 3 is an enlarged schematic view of fig. 1 at B.

Fig. 4 is an enlarged schematic view at C in fig. 1.

Fig. 5 is a schematic structural view of the vertical electrostatic fabric filter device according to another angle in the embodiment of the present invention.

In the above drawings: 1. a discharging pipe; 2. a dust accumulation hopper; 3. an electric field outer cylinder; 4. an electric field inner cylinder; 41. the peripheral wall of the electric field inner barrel; 5. a filter bag; 6. a framework; 7. a cathode line; 8. hanging in an insulating way; 9. an air inlet pipe; 10. an air bag assembly; 11. an electromagnetic pulse valve; 12. a blowing pipe; 13. a nozzle; 14. a faceplate assembly; 15. an air outlet pipe; 16. an electric field access door; 17. an inlet bar fixing device; 18. a high voltage wire inlet rod; 19. a transformer; 20. a rapping device.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

Fig. 1 to 5 are also referred to, in which fig. 2 is an enlarged schematic view at a in fig. 1, fig. 3 is an enlarged schematic view at B in fig. 1, and fig. 4 is an enlarged schematic view at C in fig. 1. The embodiment of the invention provides a vertical electrostatic fabric filter, which comprises an air inlet pipe 9, an air outlet pipe 15 and a cloth bag dust removal device; the device comprises an electric field outer cylinder 3, an electric field inner cylinder 4 positioned in the electric field outer cylinder 3, a cathode wire 7 arranged between the electric field outer cylinder 3 and the electric field inner cylinder 4, a power supply device for supplying power to the cathode wire 7 and the peripheral wall 41 of the electric field inner cylinder, and a dust deposition part communicated with the electric field outer cylinder 3 and the electric field inner cylinder 4; the electric field outer cylinder 3 is communicated with the electric field inner cylinder 4, the electric field outer cylinder 3 is communicated with the air inlet pipe 9, and a cloth bag dust removal device is arranged in the electric field inner cylinder 4 and is communicated with the air outlet pipe 15. Further, as shown in fig. 1 and 5, the electric field outer cylinder 3 and the electric field inner cylinder 4 are both cylindrical, and are separated by the electric field inner cylinder peripheral wall 41, an annular channel is formed between the electric field inner cylinder 4 and the electric field outer cylinder 3, the top of the annular channel is closed, a plurality of cathode wires 7 are arranged in the middle of the annular channel, and the outer side wall of the annular channel (i.e., the peripheral wall of the electric field outer cylinder 3) is communicated with the air inlet pipe 9, specifically, the air inlet pipe 9 is located at the position, close to the top, of the outer side wall of the annular channel. The bottom of electric field urceolus 3 and electric field inner tube 4 all is open completely, and 2 fixed connection of deposition hopper are in the bottom of electric field urceolus 3, the bottom of electric field urceolus 3 and electric field inner tube 4 through both is open-ended opening intercommunication completely, the dusty flue gas that gets into from the air intake, take the annular channel between electric field inner tube 4 and the electric field urceolus 3 earlier, the intercommunication department of rethread electric field outer tube 3 and electric field inner tube 4 bottom gets into electric field inner tube 4, rethread electric field inner tube 4's sack dust collector handles the back through air-out pipe 15 discharges.

Further, the power supply device comprises a transformer 19 fixedly connected to the outer side wall of the electric field outer cylinder 3 and a high-voltage wire inlet bar 18 fixed to the top end of the annular channel through a wire inlet bar fixing device 17, a power supply supplies power to the transformer 19, then the high-voltage wire inlet bar 18 supplies power to the cathode wire 7 between the annular channels and the peripheral wall 41 of the electric field inner cylinder, an electric field is formed between the annular channels, and most dust in smoke entering the annular channel from the air inlet pipe 9 can be adsorbed to the cathode wire 7 and the electric field inner cylinder 4. The flue gas filtered by the electric field enters the electric field inner barrel 4 through the communication part between the electric field inner barrel and the electric field outer barrel, is subjected to secondary dust removal treatment by a cloth bag dust removal device in the electric field inner barrel 4, and is finally discharged through the air outlet pipe 15. The flue gas entering from the air inlet pipe 9 can be fully contacted with the electric field in the annular channel and then enters the electric field inner barrel 4 from the communication position of the electric field inner barrel and the electric field outer barrel at the bottom. Because the clearance of the filter bag 5 in the cloth bag dust removing device is too large, small particle dust can not be effectively filtered, and the clearance is too small, the circulation capacity of air is influenced, so the filtering efficiency of the filter bag 5 is limited. Let the abundant filter effect that can improve the electric field to the dusty flue gas that stays in the electric field of dusty flue gas, lighten the dust removal pressure that the sack removed dust, improve dust collection efficiency and dust removal effect on the whole, and the arrangement mode of above-mentioned structure arranges sack dust collector in the inside of electric field, lets electricity, two parts of bag arrange together, can reduce the area of device.

Further, as shown in fig. 3, an insulating hanger 8 is fixedly connected to the cathode line 7 and the top end of the inner cylinder peripheral wall 41 of the electric field, specifically, a ceramic shaft can be used to perform the insulating and sealing functions. And an electric field access door 16 is arranged at the top of the annular channel, so that the electric field inside the annular channel can be conveniently overhauled.

Furthermore, the cloth bag dust removal device comprises a pattern plate assembly 14 fixedly connected in the electric field inner cylinder 4, a plurality of frameworks 6 are mounted on the pattern plate assembly 14, and filter bags 5 are arranged on the outer surfaces of the frameworks 6. Specifically, an external filtering type cloth bag dust removal device is adopted, dust-containing smoke is introduced from the outer surface of the filter bag 5, and dust is retained on the outer surface of the filter bag 5. Pure gas is discharged from the inner cavity of the filter bag 5 to the top end of the electric field inner barrel 4 and then is discharged through the air outlet pipe 15 at the top end. As shown in FIG. 1, the electric field inner cylinder 4 is higher than the electric field outer cylinder 3 by a section, and the air outlet pipe 15 is fixedly connected to the outer side wall of the electric field inner cylinder 4 higher than the electric field outer cylinder 3. Specifically, a pulse injection device is further arranged above the bag-type dust collector, and specifically, the pulse injection device is substantially the same as the pulse injection device in the prior art, and mainly comprises an electromagnetic pulse valve 11, an injection pipe 12 connected to the electromagnetic pulse valve, an air bag assembly 10 connected to the injection pipe 12 and an injection nozzle 13. And the nozzle 13 is an air outlet facing the filter bag 5. After the device runs for a period of time, dust with a certain thickness is accumulated on the outer surface of the filter bag 5, pulse air flow can be sprayed to the filter bag 5 through the pulse spraying device, the filter bag 5 is expanded, and then the dust attached to the crawler belt is stripped from the filter bag 5 and falls into the dust collecting hopper 2 below. Specifically, a rapping device 20 is also arranged on the outer wall of the electric field outer cylinder 3, and dust attached in the electric field can be cleaned through the rapping device 20 and falls into the dust collecting hopper 2 below. Of course, the specific location and type of the rapping device 20 can be set by itself according to the actual requirements. The specific dust deposition hopper 2 is arranged in a suspended manner, and the bottom of the dust deposition hopper is provided with a discharging pipe 1. The accumulated dust in the dust accumulation hopper 2 can be conveniently discharged.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A vertical electrostatic fabric filter comprises an air inlet pipe (9), an air outlet pipe (15) and a cloth bag dust collector; the method is characterized in that: the device is characterized by also comprising an electric field outer cylinder (3), an electric field inner cylinder (4) positioned in the electric field outer cylinder (3), a cathode wire (7) arranged between the electric field outer cylinder (3) and the electric field inner cylinder (4), a power supply device for supplying power to the cathode wire (7) and the peripheral wall (41) of the electric field inner cylinder, and a dust deposition part communicated with the electric field outer cylinder (3) and the electric field inner cylinder (4);

the electric field outer cylinder (3) is communicated with the electric field inner cylinder (4), the electric field outer cylinder (3) is communicated with the air inlet pipe (9), and a cloth bag dust removal device is arranged in the electric field inner cylinder (4) and is communicated with the air outlet pipe (15).

2. The vertical electrostatic fabric filter of claim 1, wherein: the dust deposition part is a dust deposition hopper (2), the top of the electric field outer cylinder (3) is sealed and is communicated with the air inlet pipe (9), the bottom of the electric field outer cylinder is provided with an opening communicated with the dust deposition hopper (2), and the bottom of the electric field inner cylinder (4) is provided with an opening communicated with the electric field outer cylinder (3) and the dust deposition hopper (2) in a lump.

3. The vertical electrostatic fabric filter according to claim 2, wherein: the power supply device comprises a transformer (19) and a high-voltage wire inlet rod (18) which are fixedly connected to the outer wall of the electric field outer cylinder (3).

4. The vertical electrostatic fabric filter according to claim 3, wherein: and the cathode wire (7) and the top of the peripheral wall (41) of the electric field inner barrel are fixedly connected with an insulating hanger (8).

5. The vertical electrostatic fabric filter according to claim 4, wherein: the cloth bag dust removal device comprises a pattern plate assembly (14) fixedly connected to the inner wall of an electric field, a framework (6) arranged on the pattern plate assembly (14) and a filter bag (5) arranged on the surface of the framework (6).

6. The vertical electrostatic fabric filter according to claim 5, wherein: and a pulse blowing device is also arranged above the cloth bag dust removing device, and the air outlet is also positioned above the cloth bag dust removing device.

7. The vertical electrostatic fabric filter of claim 1, wherein: an electric field access door (16) is arranged at the top between the electric field outer cylinder (3) and the electric field inner cylinder (4).

8. The vertical electrostatic fabric filter of claim 1, wherein: the outer peripheral wall of the electric field outer cylinder (3) is also fixedly connected with a rapping device (20).

9. The vertical electrostatic fabric filter according to claim 4, wherein: the insulating hanger (8) adopts a porcelain shaft.

10. The vertical electrostatic fabric filter according to claim 2, wherein: the dust collecting hopper (2) is arranged in a suspended mode, and a discharging pipe (1) is further arranged at one end, facing the ground, of the dust collecting hopper.