CN205361651U - Water logging self -purification yardage roll curtain wet -type electrostatic dust collector - Google Patents

Abstract

The utility model relates to a water-soaked self-cleaning cloth rolling curtain wet electrostatic dust collection device. The technical solution is: the dust collection device includes an air intake box (6), a dust collection device body (7), an air outlet box (10) and an ash hopper (8); the dust collection device body (7) is composed of a plurality of parallel or series arrangements Cloth roller blind unit (9) is formed, and cloth roller blind unit (9) comprises driving shaft (11), driven shaft (14), corona pole line (12) and cloth roller blind electrode (13). The cloth rolling shutter electrode (13) adopts corrosion-resistant fiber cloth. The driving shaft (11) is connected to the motor (3) through the power transmission device (4), and the cloth rolling electrode (13) is wound on the driving shaft (11) and the driven shaft (14), and the cloth rolling electrode (13) Both the inside and the outside are provided with corona pole lines (12), and the driven shaft (14) is immersed in the water of the ash hopper (8). The utility model solves the problems of uneven distribution of water film on the surface of the dust collecting pole and corrosion of the metal dust collecting pole plate, and realizes automatic mud cleaning and high-efficiency dust removal.

Description

A water-immersed self-cleaning cloth roller blind wet electrostatic precipitator

technical field

The utility model belongs to the technical field of dust removal, and relates to a wet electrostatic precipitator, in particular to a water-soaked self-cleaning cloth rolling curtain wet electrostatic precipitator.

Background technique

In recent years, in order to effectively control the emission of particulate matter pollutants, the state has formulated stricter emission standards. In general areas, the emission limit of coal-fired boiler smoke and dust is 30mg/m ³ , and in key areas, the limit of coal-fired boiler smoke and dust emission is 20mg/m ³ . This puts forward higher requirements for industrial dust removal technology.

As a high-efficiency and low-consumption dust removal equipment, dry electrostatic precipitator (ESP) is widely used in industry, but it has a series of problems. For example, it is easy to generate secondary dust when vibrating and cleaning. If the plate dust is too thick, it will cause back corona phenomenon, and the collection efficiency of fine particles (diameter less than 5μm) is low.

The use of wet electrostatic precipitator (WESP) can not only effectively prevent the generation of secondary dust, but also make it difficult to produce back corona phenomenon. At the same time, the collection efficiency of fine particles (diameter less than 5μm) is also very high. However, there are still three problems in the traditional wet electrostatic precipitator: First, most of the dust collecting plates are made of metal plates, and the metal plates are not flat, which causes the washing water to flow on the plates when spraying water to wash the plates. The distribution on the plate is not uniform, which leads to the phenomenon of "channel flow". If the water does not reach the place, it is easy to generate scale. If the scale is not removed in time, it will affect the dust removal efficiency of the dust collector, and even cause the failure of the dust collector; second, Industrial flue gas usually contains corrosive gases. In order to prevent the corrosion of the plates, the dust collector plates are made of corrosion-resistant alloy materials (such as stainless steel plates), which increases the cost of wet electrostatic precipitators; third, traditional wet electrostatic precipitators In the dust collector, a spray system must be installed in the dust collector. Under the action of the electric field force, the water mist is collected on the plate and flows down along the plate to achieve the purpose of cleaning the plate. However, part of the uncollected water mist is It is discharged with the gas, producing white plume.

In order to achieve uniform distribution of water film and avoid corrosion of metal plates, Shandong University proposed a water-distributed flexible dust-collecting electrode device (patent application number: 201210295051.2). The water pipe is arranged in the middle of the plate to realize the uniform distribution of the water film, but the dust collection pole of this device only collects dust on one side, and the area between the driving shaft and the driven shaft is not collected, which wastes a part of the space. In addition, the device uses a scraper to scrape mud to clear the mud. The friction between the scraper and the pole plate will wear the dust collection pole to a certain extent, and affect the service life of the dust collection pole.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a water-immersed self-cleaning cloth rolling curtain wet electrostatic dust collection device, which can distribute the water film evenly, collect dust on both sides of the dust collection pole, and avoid metal electrodes Corrosion problems, and can continuously remove the deposited dirt on the surface of the dust collector. In addition, the utility model can achieve the effect of wet electrostatic dust removal regardless of whether it is sprayed or not, thereby enhancing the adaptability to dust purification. The utility model has the advantages of simple and compact structure, safe and stable operation, and can realize high-efficiency capture of fine particles.

In order to achieve the above object, the utility model adopts the following technical solutions:

The water-soaked self-cleaning cloth roller blind wet electrostatic precipitator includes an air inlet box, a dust collector body, an air outlet box and an ash hopper.

The air intake box is fixedly connected with the air inlet end of the dust collection device body, the air outlet box is fixedly connected with the air outlet end of the dust collection device body, and the ash hopper is airtightly connected with the bottom of the dust collection device body.

The body of the dust collecting device is composed of a corona pole wire frame, a pull rod terminal, a motor, a power transmission device and a plurality of cloth roller shutter units arranged in parallel or in series.

The corona pole wire frame is fixed on the top of the dust collecting device body through the tie rod terminal and the insulator.

The cloth roller blind unit includes a driving shaft, a driven shaft, a corona pole line and a cloth roller blind electrode.

The driving shaft is connected with the motor through the power transmission device, the cloth rolling electrode is wound on the driving shaft and the driven shaft, and the inside and outside of the cloth rolling electrode are provided with corona pole lines.

The material used for the cloth rolling screen electrode is corrosion-resistant fiber cloth.

In the cloth rolling screen unit, the cloth rolling screen electrode rotates with the rotation of the drive shaft, and the distance from the corona pole line to the cloth rolling screen electrode is 100-500 mm.

The ash hopper is full of water, the lower half of the driven shaft is immersed in the water in the ash hopper, and the depth of the driven shaft immersed in the water is about 0.25 to 0.5 times the diameter of the driven shaft.

The corona pole wires are one of round wires, RS type prickly wires, star wires, zigzag wires, and angle steel prickly wires, and the corona pole wires are arranged in parallel and equidistantly on the corona pole wire frame, The corona pole wire frame is fixed on the top of the dust collecting device body through insulators and pull rod terminals.

In the utility model, corona wires are arranged on the inner side and the outer side of each cloth roller shutter unit, so that the inner side and the outer side of the cloth roller shutter electrodes collect dust at the same time, which improves the space utilization rate and reduces the volume of the dust collector.

The effects of the driven shaft being immersed in water are:

(1) Make the water film of the electrode of the cloth roller blind evenly distributed. The driven shaft is in the water, and the cloth roller blind electrode will pass through the water when it rotates, thus ensuring that the cloth roller blind electrode is completely wet and avoiding the problem of uneven distribution of water film.

(2) Dust collector automatically clears mud. The driven shaft is in the water, and there is relative motion between the cloth roller blind electrode and the water when it passes through the water, which is equivalent to washing the cloth roller blind electrode. Therefore, when the cloth roller blind moves in the water, the mud on the cloth roller blind electrode will It is automatically washed off, keeping the dust collector extremely clean.

Due to the adoption of the above-mentioned technical scheme, when the dust-laden airflow enters the dust collecting device, it first passes through the line-plate electric field composed of the high-voltage corona pole wire and the cloth roller shutter electrode, and the high-voltage corona pole wire corona discharges the dust-laden airflow to The dust is negatively charged, and the charged dust moves to the electrode of the cloth rolling screen under the action of the electric field force, and settles on the electrode of the cloth rolling screen. There is water on the cloth roller shutter electrode, when the dust settles on the cloth roller shutter electrode, the dust is stuck by the water and turns into mud, and at the same time, the charge on the dust is released immediately through the cloth roller shutter electrode, so there is no secondary dust after the dust settles. secondary dusting and anti-corona issues. The mud moves with the cloth rolling electrode. When the cloth rolling electrode moves to the driven shaft and enters the water, on the one hand, there is a relative motion between the cloth rolling electrode and the water, and the mud on the surface of the cloth rolling electrode will be washed off by the water. , to ensure that the dust-collecting surface of the cloth roller shutter electrode is clean and free from scaling. On the other hand, the cloth rolling screen electrode passes through the water, which ensures that the cloth rolling screen electrode is completely wet and realizes the uniform distribution of the water film. For acidic or alkaline dust-containing gas, use acid-resistant or alkali-resistant fiber cloth as the dust collector to avoid corrosion of the metal dust collector.

Compared with the traditional wet electrostatic precipitator, the utility model has the following advantages:

(1) The corrosion-resistant fiber cloth is used as the dust collector, which can effectively avoid the corrosion of the metal plate.

(2) The utility model arranges corona wires on the inner side and the outer side of each cloth roller shutter unit, so that the inner side and the outer side of the cloth roller shutter electrodes collect dust at the same time, which improves the space utilization rate and saves the occupied space.

(3) Make the water film of the electrode of the cloth roller blind evenly distributed. The driven shaft is in the water, and the cloth roller blind electrode will pass through the water when it rotates, thus ensuring that the cloth roller blind electrode is completely wet and avoiding the problem of uneven distribution of water film.

(4) Dust collector automatically clears mud. The driven shaft is in the water, and there is relative motion between the cloth roller blind electrode and the water when it passes through the water, which is equivalent to washing the cloth roller blind electrode. Therefore, when the cloth roller blind moves in the water, the mud on the cloth roller blind electrode will It is automatically washed off, keeping the dust collector extremely clean.

(5) The application range of the wet electrostatic precipitator is widened, and the cost is saved. The traditional wet electrostatic precipitator must be equipped with a spray system in the precipitator. Under the action of the electric field force, the water mist is collected on the plate and flows down along the plate to achieve the purpose of cleaning the plate. The collected water mist is expelled with the gas, producing a white plume. In the utility model, because the dust collection pole is kept moist all the time, and the dust collection pole is cleaned in the funnel, there is no need to set up a spray system for cleaning the dust collection pole in the whole dust removal system, and only need to set up a spray system for cleaning the dust collection pole in some special cases. The spray system is used to adjust the properties of the flue gas, thereby avoiding the generation of white plume, saving the water consumption of the wet electrostatic precipitator, and reducing the operation and maintenance costs.

The beneficial effect of the utility model is that it avoids the corrosion problem of the metal dust collector, can make full use of the surface of the dust collector, expands the dust collection area, saves the occupied space, and realizes the uniform distribution of the water film and efficient automatic dust removal , avoiding the generation of white plume, saving costs, and ensuring the safe, stable, economical and efficient operation of the water-immersed self-cleaning cloth roller shutter wet electrostatic precipitator.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of Embodiment 1 of the present utility model.

Fig. 2 is a schematic plan view of the first embodiment of the utility model.

Fig. 3 is an A-A view of Fig. 2 .

Fig. 4 is a structural schematic diagram of a cloth roller blind unit in Fig. 1 or Fig. 2 .

Fig. 5 is a front view of Fig. 4 .

detailed description

Below in conjunction with accompanying drawing and embodiment 1, the utility model is described further.

Example 1

A water-immersed self-cleaning cloth roller blind wet electrostatic precipitator, as shown in Fig. 1, Fig. 2 and Fig. 3, includes an air intake box 6, a dust collection device body 7, an air outlet box 10 and an ash hopper 8.

The air intake box 6 is fixedly connected with the intake end of the dust collection device body 7 , the air outlet box 10 is fixedly connected with the gas outlet end of the dust collection device body 7 , and the bottom of the ash hopper 8 and the dust collection device body 7 is airtightly connected.

The dust collection device body 7 is composed of a corona pole wire frame 5, a pull rod terminal 2, a motor 3, a power transmission device 4 and three cloth roller shutter units 9 arranged in series.

The corona pole wire frame 5 is fixed on the top of the dust collecting device body 7 through the tie rod terminal 2 and the insulator 1 .

As shown in FIG. 3 , FIG. 4 and FIG. 5 , the cloth rolling screen unit 9 includes five corona pole wires 12 , three sets of driving shafts 11 , three sets of driven shafts 14 , and three cloth rolling screen electrodes 13 .

The driving shaft 11 is connected to the motor 3 through the power transmission device 4, the cloth rolling electrode 13 is wound on the driving shaft 11 and the driven shaft 14, and the inner and outer sides of the cloth rolling electrode 13 are provided with corona wires 12.

The material used for the cloth roll-up electrode 13 is corrosion-resistant fiber cloth.

In the cloth rolling screen unit 9, the cloth rolling screen electrode 13 rotates with the rotation of the driving shaft 11, and the distance from the corona pole wire 12 to the cloth rolling screen electrode 13 is 300mm.

The ash hopper 8 is full of water, the lower half of the driven shaft 14 is immersed in the water in the ash hopper 8, and the depth of the driven shaft 14 immersed in water is about 0.4 times of the diameter of the driven shaft 14.

The working principle of the utility model is: when the dust-laden airflow enters the dust collecting device, it first passes through the wire-plate electric field composed of the high-voltage corona pole line and the cloth roller shutter electrode, and the high-voltage corona pole line is corona-discharged to make the dust-laden airflow The dust in the dust is negatively charged, and the charged dust moves to the electrode of the cloth rolling screen under the action of the electric field force, and settles on the electrode of the cloth rolling screen. There is water on the cloth roller shutter electrode, when the dust settles on the cloth roller shutter electrode, the dust is stuck by the water and turns into mud, and at the same time, the charge on the dust is released immediately through the cloth roller shutter electrode, so there is no secondary dust after the dust settles. secondary dusting and anti-corona issues. The mud moves with the cloth rolling electrode. When the cloth rolling electrode moves to the driven shaft and enters the water, on the one hand, there is a relative motion between the cloth rolling electrode and the water, and the mud on the surface of the cloth rolling electrode will be washed off by the water. , to ensure that the dust-collecting surface of the cloth roller shutter electrode is clean and free from scaling. On the other hand, the cloth rolling screen electrode passes through the water, which ensures that the cloth rolling screen electrode is completely wet and realizes the uniform distribution of the water film. For acidic or alkaline dust-containing gas, use acid-resistant or alkali-resistant fiber cloth as the dust collector, which can avoid the corrosion problem of the metal dust collector.

In the utility model, corona wires are arranged on the inner side and the outer side of each cloth rolling shutter unit, so that the inner side and the outer side of the cloth rolling shutter electrodes collect dust at the same time, and the space utilization rate is improved.

The effects of the driven shaft being immersed in water are:

(1) Make the water film of the electrode of the cloth roller blind evenly distributed. The driven shaft is in the water, and the cloth roller blind electrode will pass through the water when it rotates, thus ensuring that the cloth roller blind electrode is completely wet and avoiding the problem of uneven distribution of water film.

(2) Dust collector automatically clears mud. The driven shaft is in the water, and there is relative motion between the cloth roller blind electrode and the water when it passes through the water, which is equivalent to washing the cloth roller blind electrode. Therefore, when the cloth roller blind moves in the water, the mud on the cloth roller blind electrode will It is automatically washed off, keeping the dust collector extremely clean.

The beneficial effect of the utility model is that it avoids the corrosion problem of the metal dust collector, can make full use of the surface of the dust collector, expands the dust collection area, saves the occupied space, and realizes the uniform distribution of the water film and efficient automatic dust removal , to ensure the safe, stable and economical operation of the wet electrostatic precipitator, and at the same time realize the efficient capture of fine particles.

Although the preferred embodiment of the utility model has been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific implementation, those of ordinary skill in the art under the inspiration of the invention purpose and claims of the utility model, made A variety of similar representations, such as fully immersing the driven shaft in water, raising the water level, keeping the driven shaft from falling into the ash hopper, arranging the cloth roller blind electrode perpendicular to the airflow direction, setting the cloth roller blind cleaning device, setting the spray Or sprinkler system etc., such conversion all falls into protection domain of the present utility model.

Claims (4)

1. A water-immersed self-cleaning cloth roller blind wet electrostatic dust collection device, characterized in that the dust collection device includes an air intake box (6), a dust collection device body (7), an air outlet box (10) and an ash hopper (8) ; The air intake box (6) is fixedly connected with the air inlet end of the dust collection device body (7), the air outlet box (10) is fixedly connected with the air outlet end of the dust collection device body (7), and the ash hopper (8) and the dust collection device body (7) bottom airtight connection; The dust collection device body (7) consists of a corona pole wire frame (5), a tie rod terminal (2), a motor (3), a power transmission device (4) and a plurality of cloth roller shutter units (9) arranged in parallel or in series. composition; The corona pole wire frame (5) is fixed on the top of the dust collection device body (7) through the tie rod terminal (2) and the insulator (1): The cloth roller blind unit (9) includes a driving shaft (11), a driven shaft (14), a corona pole line (12) and a cloth roller blind electrode (13); The driving shaft (11) is connected to the motor (3) through the power transmission device (4), and the cloth rolling electrode (13) is wound on the driving shaft (11) and the driven shaft (14), and the cloth rolling electrode (13) Both the inside and the outside are provided with corona pole lines (12). 2. The water-immersed self-cleaning cloth rolling screen wet-type electrostatic precipitator according to claim 1, characterized in that the material used for the cloth rolling screen electrode (13) is corrosion-resistant fiber cloth. 3. The water-immersed self-cleaning cloth roller blind wet-type electrostatic precipitator according to claim 1, characterized in that in the cloth roller shutter unit (9), the cloth roller shutter electrode (13) follows the movement of the drive shaft (11) Rotate and rotate, the distance from the corona pole wire (12) to the cloth rolling screen electrode (13) is 100～500mm. 4. The water-immersed self-cleaning cloth rolling curtain wet electrostatic precipitator according to claim 1, characterized in that the ash hopper (8) is filled with water, and the lower half of the driven shaft (14) is immersed in the ash hopper ( 8) in the water, the depth of the driven shaft (14) immersed in water is about 0.25～0.5 times of the driven shaft (14) diameter.