CN111871610A - A vertical electric bag composite dust collector - Google Patents

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

A vertical electric bag composite dust collector

technical field

The invention relates to the technical field of dust removal, in particular to a vertical electric bag composite dust collector.

Background technique

With the rapid development of modern industry, especially the development of coal-fired power plants, metallurgy, mining, cement, chemical industry, foundry and other industries, it has caused serious air pollution in my country, thus restricting the development of my country's economy. Air pollution can have serious effects on people's health and environmental health.

In the field of dust removal, although the electrostatic bag composite precipitator has been widely used in industrial purification of flue gas emissions, the electrostatic precipitator area has a front-stage electric field, and the bag filter area has a filter bag. Part of the charge of the flue gas passing through the electrostatic precipitator area is captured in the front-stage electric field, and the other part of the charge continues to flow to the filter bag, which is filtered by the filter bag. Although the dust removal efficiency of the electric bag composite precipitator is improved compared with the bag precipitator, the prior art electric bag composite precipitator has certain defects. For example, when the current electric bag composite precipitator filters high-concentration and fast-flowing flue gas, the front-stage electric field cannot adequately capture the flue gas, and the flue gas flows to the filter bag, and the filtering capacity of the filter bag is limited and cannot efficiently collect dust. In addition, the existing electric bag composite dust collector generally occupies a large area, which will increase the industrial cost. In view of the above problems, it is necessary to improve the electric bag composite precipitator, so as to improve the dust removal efficiency and dust removal effect of the electric bag composite precipitator, reduce the industrial cost, and meet the requirements of modern industrial economy, energy saving and environmental protection.

SUMMARY OF THE INVENTION

Aiming at the deficiencies in the prior art, the present invention provides a vertical electric bag composite dust collector, which solves the problems of low dust removal efficiency, poor dust removal effect and large floor space in the prior art.

According to an embodiment of the present invention, a vertical electric bag composite dust collector includes an air inlet pipe, an air outlet pipe and a bag dust removal device; it also includes an electric field outer cylinder, an electric field inner cylinder located in the electric field outer cylinder, and an electric field inner cylinder located in the electric field outer cylinder. a cathode wire 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 accumulator connected with the electric field outer cylinder and the electric field inner cylinder;

The electric field outer cylinder and the electric field inner cylinder communicate with each other, the electric field outer cylinder communicates with the air inlet pipe, and the electric field inner cylinder is provided with a bag dust removal device and communicates with the air outlet pipe.

The technical principle of the invention is as follows: the dust-laden flue gas enters between the electric field outer cylinder and the electric field inner cylinder through the air inlet pipe, and the power supply device supplies power to the cathode line and the peripheral wall of the electric field inner cylinder to form an electric field. The dust is collected between the inner and outer cylinders, and the rest enters the inner cylinder of the electric field and is filtered by the bag dust removal device and then discharged through the air outlet pipe.

Compared with the prior art, the present invention has the following beneficial effects: compared with the prior art, the dust-laden flue gas can stay in the electric field sufficiently and then enter the bag dedusting device in the inner cylinder of the electric field for dedusting, thereby reducing the dedusting pressure of the bag dedusting , improve the dust removal efficiency and dust removal effect, and the arrangement of the above structure arranges the bag dust removal device inside the electric field, so that the two parts of "electricity" and "bag" are arranged together, which can reduce the footprint of the device.

Description of drawings

FIG. 1 is a schematic structural diagram of a vertical electric bag composite dust removal device according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic view of A in FIG. 1 .

FIG. 3 is an enlarged schematic view of B in FIG. 1 .

FIG. 4 is an enlarged schematic view of C in FIG. 1 .

FIG. 5 is a schematic structural diagram of another angle of the vertical electric bag composite dust removal device according to the embodiment of the present invention.

In the above drawings: 1, feeding pipe; 2, ash hopper; 3, electric field outer cylinder; 4, electric field inner cylinder; 41, peripheral wall of electric field inner cylinder; 5, filter bag; 6, skeleton; 7, cathode wire; 8. Insulation hanging; 9. Air inlet pipe; 10. Air bag assembly; 11. Electromagnetic pulse valve; 12. Blow pipe; 13. Nozzle; Door; 17. Fixing device for incoming wire rod; 18. High voltage incoming wire rod; 19. Transformer; 20. Rapping device.

Detailed ways

The technical solutions in the present invention will be further described below with reference to the accompanying drawings and embodiments.

1 to 5 together, FIG. 2 is an enlarged schematic diagram of A in FIG. 1 , FIG. 3 is an enlarged schematic diagram of B in FIG. 1 , and FIG. 4 is an enlarged schematic diagram of C in FIG. 1 . The embodiment of the present invention proposes a vertical electric bag composite dust collector, including an air inlet pipe 9, an air outlet pipe 15 and a bag dust removal device; including an electric field outer cylinder 3, an electric field inner cylinder 4 located in the electric field outer cylinder 3, an electric field The cathode line 7 arranged between the outer cylinder 3 and the electric field inner cylinder 4, the power supply device for supplying power to the cathode line 7 and the peripheral wall 41 of the electric field inner cylinder, the dust accumulation member communicating 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 the electric field inner cylinder 4 is provided with a bag dust removal device and communicated with the air outlet pipe 15. Further, as shown in FIG. 1 and FIG. 5 , the electric field outer cylinder 3 and the electric field inner cylinder 4 are both cylindrical, and the two are separated by the electric field inner cylinder peripheral wall 41, and the electric field inner cylinder 4 and the electric field outer cylinder 3 are separated. An annular channel is formed between them, the top of the annular channel is closed, a number of cathode lines 7 are arranged in the middle of the annular channel, and the outer side wall of the annular channel (that is, 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 near the top of the outer side wall of the annular channel. The bottoms of the electric field outer cylinder 3 and the electric field inner cylinder 4 are both completely open, and the ash hopper 2 is fixedly connected to the bottom of the electric field outer cylinder 3. The electric field outer cylinder 3 and the electric field inner cylinder 4 pass through the openings at the bottom of the two that are completely open. Connected, the dust-laden flue gas entering from the air inlet first enters the annular channel between the electric field inner cylinder 4 and the electric field outer cylinder 3, and then enters the electric field through the connection at the bottom of the electric field outer cylinder 3 and the electric field inner cylinder 4. The tube 4 is then processed by the bag dust removal device in the inner tube 4 of the electric field and then discharged through the air outlet pipe 15 .

Further, the power supply device includes a transformer 19 that is fixedly connected to the outer side wall of the electric field outer cylinder 3, and a high-voltage incoming bar 18 that is fixed on the top of the above-mentioned annular channel through the incoming bar fixing device 17. The power supply supplies power to the transformer 19, and then passes The high-voltage inlet rod 18 supplies power to the cathode wire 7 between the annular channels and the peripheral wall 41 of the electric field inner cylinder, forming an electric field between the annular channels, and most of the dust in the flue gas entering the annular channel from the air inlet pipe 9 will adsorb the cathode wire 7 and the electric field on the inner cylinder 4. The flue gas filtered by the electric field enters the inner cylinder 4 of the electric field through the connection between the inner and outer barrels of the electric field, and is subjected to a second dust removal treatment by the bag dust removal device in the inner cylinder 4 of the electric field, and finally the filtered flue gas is discharged through the air outlet 15 smoke. The flue gas entering from the air inlet pipe 9 will fully contact the electric field in the annular channel and then enter the electric field inner cylinder 4 from the connection between the inner and outer cylinders of the electric field at the bottom. Because the gap of the filter bag 5 in the bag dust removal device is too large, the small particles of dust cannot be effectively filtered, and the gap is too small, which affects the gas flow capacity, so the filtering efficiency of the filter bag 5 is limited. Allowing the dust-laden flue gas to stay in the electric field sufficiently can improve the filtering effect of the electric field on the dust-laden flue gas, reduce the dust removal pressure of the bag dust removal, and improve the dust removal efficiency and dust removal effect as a whole. It is arranged inside the electric field, and the two parts of the electric and the bag are arranged together, which can reduce the footprint of the device.

Further, as shown in FIG. 3 , an insulating hanger 8 is fixedly connected to the cathode line 7 and the top of the inner cylinder wall 41 of the electric field. Specifically, a porcelain shaft can be used to function as insulation and sealing. In addition, an electric field inspection door 16 is provided on the top of the annular channel, which can facilitate the inspection of the electric field inside the annular channel.

Further, the above-mentioned bag dust removal device includes a pattern plate assembly 14 fixedly connected to the inner cylinder 4 of the electric field, a plurality of frames 6 are installed on the flower plate assembly 14, and the outer surface of the frame 6 is provided with a filter bag 5. Specifically, an external filter type bag dust removal device is adopted, and the dust-laden flue gas is introduced from the outer surface of the filter bag 5 , and the dust is retained on the outer surface of the filter bag 5 . The pure gas is discharged from the inner cavity of the filter bag 5 to the top of the inner cylinder 4 of the electric field, and then discharged through the air outlet pipe 15 at the top. 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 above-mentioned 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 also provided above the bag dust removal device. Specifically, it is roughly the same as the pulse injection device in the prior art, and mainly includes an electromagnetic pulse valve 11 and an injection pipe 12 connected to the electromagnetic pulse valve. , the air bag assembly 10 and the nozzle 13 connected to the blowing pipe 12 . And the nozzle 13 is the air outlet facing the filter bag 5 . After the device runs for a period of time, the outer surface of the filter bag 5 will accumulate and adhere to a certain thickness of dust, and the pulse jet device can inject a pulsed airflow to the filter bag 5 to expand the filter bag 5, and then let the dust attached to the crawler track. Peel off the filter bag 5 and drop it into the ash hopper 2 below. Specifically, a rapping device 20 is also installed on the outer wall of the electric field outer cylinder 3, and the dust adhering to the electric field can be cleaned by the rapping device 20 and dropped into the ash accumulation hopper 2 below. Of course, the specific setting position and model of the rapping device 20 can be set by themselves according to actual needs. The specific ash hopper 2 is suspended and provided with a feeding pipe 1 at the bottom. It is convenient for the ash hopper 2 to discharge the ash inside it.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

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.

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