CN102784719B - Water internally-distributed type flexible dust collecting electrode device - Google Patents

Abstract

The invention discloses a water-distributed flexible dust-collecting pole device, which comprises a driving shaft, a driven shaft and a flexible dust-collecting pole. The flexible dust-collecting pole is wound on the driving shaft and the driven shaft, and the driving shaft and the driven A number of water distribution devices are arranged between the flexible dust collecting poles between the shafts, the driving shaft is connected with the power device, and electrodes are provided on at least one side of the flexible dust collecting poles. The dust-collecting poles of the present invention adopt two arrangements: mobile and fixed. The water distribution device adopts steel pipes with small holes or grooves at a certain angle, and is placed between the flexible dust-collecting poles. The supporting structure of the flexible dust collecting pole. The device can realize the uniform distribution of water film and automatic and efficient dust removal, and avoid the corrosion problem of the metal dust collecting pole, ensure the stable, economical, safe and reliable operation of the wet electrostatic precipitator equipment, and realize the efficient collection of fine particles.

Description

Inner cloth water type flexible dust collector device

technical field

The invention relates to a flue gas pollution treatment technology, in particular to a water-distributed flexible dust collecting electrode device applied to a wet electrostatic precipitator.

Background technique

At present, with the official implementation of the "Pollutant Emission Standards for Thermal Power Plants" (GB132232011) and the official release of the "Ambient Air Quality Standards" (GB30952012), the emission control of ultrafine particles is officially launched. As an important emission source of particulate matter in the atmosphere, coal-fired power plants are all equipped with dust collectors, but dry electrostatic precipitators (ESP) are commonly used. The dust collectors of this kind of dust collectors operate in a dry state. The collection efficiency of dust particles with high specific resistance that is easy to form back corona is low, and for fine particles below 10 μm (especially 2.5 μm), it is difficult to charge the fine particles, and the secondary dust generated by electrode vibration is easy to make the collected fine particles Particles escape, resulting in a sharp drop in removal efficiency. The escape of a large number of fine dust particles causes excessive smoke concentration, which is not only difficult to meet the new standard requirements, but also because most of the main pollutants that are toxic and harmful to the human body are concentrated in fine dust particles below 10 μm, the escape of a large number of fine dust particles is also difficult. It has seriously affected people's health and caused huge economic losses.

The use of wet dust collecting poles can effectively overcome the back corona problem of dry dust collecting poles and prevent secondary dusting of fine particles, so it can effectively improve the efficiency of electrostatic dust removal, especially the removal of fine dust. However, the wet dust collecting poles currently used in industrial applications are generally composed of hard materials such as metals. Due to problems such as surface tension and machining flatness deviations, it is impossible for the flushing water to be completely evenly distributed on the entire surface of the dust collecting poles, and it is easy to flow on the dust collecting poles. The surface forms a "channel flow", so that the dust particles are easy to accumulate and scale in places where the water flow cannot wash. If it is not disassembled and cleaned in time, it will eventually lead to the failure of the dust collection; the acid mist and other components contained in the flue gas are more likely to corrode ordinary materials. Therefore, most of the metal dust collecting poles are made of high-cost alloy materials. The above problems have seriously affected the operational stability, safety, reliability, and economy of electrostatic precipitators using wet dust collectors.

In addition, Chinese patent ZL200910019222.7 discloses a device and process for homogenizing the water film on the surface of the fiber fabric dust collecting pole. In this process, water holes of Φ1-Φ2 mm are densely distributed on the upper end of the dust collecting pole, and the water flows downward under the action of gravity. , using fiber capillary action to achieve uniform distribution of water film. Since this kind of process device only installs the water distribution device on the upper end of the dust collecting pole, the water film can only extend downward from the upper end. The problem of insufficient thickness affects the dust collection efficiency of the dust collector; in addition, in the above-mentioned patents, the dust removal of the dust collector is only achieved by the difference in the surface tension and shrinkage ratio between the dust cake layer and the dust collector, which may easily lead to incomplete dust removal. Affect the follow-up dust removal efficiency.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a flexible dust collector device with inner water distribution, which can realize the uniform distribution of water film and automatic and efficient dust removal, and avoid the corrosion of metal dust collectors To solve the problem, ensure the stable, economical, safe and reliable operation of the wet electrostatic precipitator equipment, and realize the efficient capture of fine particles.

To achieve the above object, the present invention adopts the following technical solutions:

A water-distributed flexible dust-collecting pole device, comprising a driving shaft, a driven shaft and a flexible dust-collecting pole, the flexible dust-collecting pole is wound on the driving shaft and the driven shaft, and the A number of water distribution devices are arranged between the flexible dust collecting poles, the driving shaft is connected with the power device, and electrodes are provided on at least one side of the flexible dust collecting poles.

The outer surface of the flexible dust collecting pole is provided with at least one dust cleaning device in contact with its outer surface.

The dust removal device is a scraper.

At least one end of the driving shaft and the driven shaft is provided with a limiting device.

The limiting device is a limiting block or a limiting protrusion.

The flexible dust collecting pole is a plate-like body made of flexible fabric.

The water distribution device is a pipe with small holes or grooves.

The angle between the small hole or groove on the tube and the horizontal direction is greater than 0° and less than 90°.

An inner water-distributing flexible dust-collecting pole device, comprising a pair of flexible dust-collecting poles arranged in parallel, a water-distributing device is arranged between the pair of flexible dust-collecting poles, and a conductive As for the test device, electrodes are provided on at least one side of the flexible dust collecting pole.

The distance between the pair of flexible dust collecting poles is between 20-80mm.

The flexible dust collecting pole is a plate-like body made of flexible fabric.

The water distribution device is a pipe with small holes or grooves.

The angle between the small hole or groove on the tube and the horizontal direction is greater than 0° and less than 90°.

The flexible dust-collecting poles of the present invention adopt two arrangements: mobile and fixed. The water distribution device adopts a steel pipe with small holes or grooves at a certain angle, which is placed between the flexible dust-collecting poles, and water is distributed from the dust-collecting poles. Make the supporting structure of the flexible dust collecting pole.

When the mobile flexible dust collecting pole is adopted, the dust collecting pole adopts the up and down circular movement mode, and the water distribution device is fixed between the flexible dust collecting poles that rotate up and down, through the up and down circular movement of the dust collecting pole and the regular water spraying of the water distribution device , to achieve stable and even water distribution of the dust collector. There is a dust cleaning device on the lower and/or upper part of the dust collecting pole, and the deep dust cleaning of the dust collecting pole is realized through the contact friction or spraying with the dust cleaning device during the movement of the dust collecting pole. When the above structure is adopted, the position of the driving shaft is fixed and the speed is adjustable, and the position of the driven shaft is adjustable and relatively fixed, so as to ensure that the flexible dust collecting pole is always kept vertical and in a tensioned state;

When using fixed flexible dust collecting poles, the dust collecting poles are arranged in a double-layer structure, the distance between the two layers is between 20-80mm, the water distribution device is fixed between the two dust collecting poles, and the dust collecting poles are installed with The conductivity test device determines the water spray volume and water spray interval through the change of the conductivity of the dust collecting electrode, so as to realize the stable and uniform water distribution and dust cleaning of flexible dust collection. In order to prevent the dust collection pole from shaking, the dust collection pole is fixed in layers.

In application, multiple sets of the present invention can be combined side by side and placed in a wet electrostatic precipitator for use according to needs, and the distance between adjacent dust collecting electrodes is between 200-800mm; each set of water spraying flexible dust collecting device The dust collection pole is a whole, and the inner water spray device can be installed with multiple sets according to the needs.

The beneficial effects of the present invention are that the present invention can realize uniform distribution of water film and automatic and efficient dust removal, and avoid the corrosion problem of metal dust collecting poles, ensure the stable, economical, safe and reliable operation of the wet electrostatic precipitator equipment, and realize fine particle dust removal. efficient capture.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a schematic structural view of Embodiment 2 of the present invention;

Fig. 4 is the top view of Fig. 3;

Among them 1. Drive shaft, 2. Flexible dust collection pole, 3. Water distribution device, 4. Ash cleaning device, 5. Electrode, 6. Driven shaft, 7. Limiting device, 8. Conductivity testing device.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: As shown in Figures 1 and 2, the water-distributed flexible dust-collecting pole device includes a driving shaft 1, a driven shaft 6 and a flexible dust-collecting pole 2, and the flexible dust-collecting pole 2 is wound around the driving shaft 1 And on the driven shaft 6, several water distribution devices 3 are arranged between the flexible dust collecting pole 2 between the driving shaft 1 and the driven shaft 6, the driving shaft 1 is connected with the power device, and at least one outside of the flexible dust collecting pole 2 An electrode 5 is provided on the side. The exterior of the flexible dust collecting pole 2 is provided with at least one dust cleaning device 4 in contact with its outer surface. At least one end of the driving shaft 1 and the driven shaft 6 is provided with a limiting device 7 . The limiting device 7 is a limiting block or a limiting protrusion. The flexible dust collecting pole 2 is a plate-shaped body made of flexible fabric. The water distribution device 3 is a steel pipe with small holes or grooves. The angle between the small hole or groove on the steel pipe and the horizontal direction is greater than 0° and less than 90°.

As the voltage rises, the tip of the electrode 5 discharges to ionize the air and generate a large amount of negative ions; the dust particles in the flue gas combine with the negative ions and move towards the flexible dust collecting pole 2; the flexible dust collecting pole 2 realizes the up and down cycle movement through the driving shaft 1 , through the cooperation with the water distribution device 3 during the movement, the uniform distribution of the water film is realized; the flexible dust collecting pole 2 with a uniform water film captures the dust particles moving to the dust collecting pole, due to the viscous force of the water, the particles In particular, the problem of secondary back-mixing of fine particles will not occur, and the efficient collection of fine particles will be realized; during the rotating movement of the flexible dust collecting pole 2, not only the continuous and uniform distribution of the water film can be maintained, but also through the friction with the cleaning device 4 , to realize the cleaning of the flexible dust collecting pole 2.

Embodiment 2: As shown in Figures 3 and 4, the inner water-distributing flexible dust-collecting pole device includes a pair of flexible dust-collecting poles 2 arranged in parallel, and a water-distributing device is arranged between the pair of flexible dust-collecting poles 2 3. A conductivity testing device 8 is implanted in the flexible dust-collecting pole 2, and an electrode 5 is provided on at least one side of the flexible dust-collecting pole 2. The distance between a pair of flexible dust collecting poles 2 is between 20-80mm. The flexible dust collecting pole 2 is a plate-shaped body made of flexible fabric. The water distribution device 3 is a steel pipe with small holes or grooves. The angle between the small hole or groove on the steel pipe and the horizontal direction is greater than 0° and less than 90°.

As the voltage rises, the tip of the electrode 5 discharges to ionize the air and generate a large amount of negative ions; the dust particles in the flue gas combine with the negative ions and move towards the flexible dust collecting pole 2; the flexible dust collecting pole 2 is equipped with a conductivity testing device 8 According to the change of conductivity, the water distribution device 3 is used to distribute water to the dust collection pole; the flexible dust collection pole 2 with a uniform water film captures the dust particles moving to the dust collection pole. Due to the viscous force of water, the particles are particularly The problem of secondary back-mixing of the fine particles will not occur, and the efficient capture of the fine particles is realized; the cleaning of the flexible dust collecting pole is realized through the water distribution device 3 .

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (6)

1. A kind of inner cloth water type flexible dust collecting pole device, it is characterized in that, comprises driving shaft, driven shaft and flexible dust collecting pole, and described flexible dust collecting pole is wound on driving shaft and driven shaft, and driving shaft and A number of water distribution devices are provided between the flexible dust collecting poles between the driven shafts, and the water distributing devices are pipes with small holes or grooves; the driving shaft is connected with the power device, and at least one side of the flexible dust collecting poles is An electrode is provided; at least one cleaning device in contact with the outer surface of the flexible dust collecting pole is provided outside; the cleaning device is a scraper. 2. The inner-distributed water-type flexible dust collector device according to claim 1, wherein at least one end of the driving shaft and the driven shaft is provided with a limiting device. 3. The inner-distributed water-type flexible dust collector device according to claim 2, wherein the limiting device is a limiting block or a limiting protrusion. 4. An inner water-distributing flexible dust-collecting pole device, comprising a pair of flexible dust-collecting poles arranged in parallel, a water distribution device is provided between the pair of flexible dust-collecting poles, and the water distribution device is equipped with a small A tube with holes or grooves; a conductivity testing device is implanted in the flexible dust collecting pole, and electrodes are provided on at least one side of the flexible dust collecting pole; the flexible dust collecting pole is a plate-shaped body made of flexible fabric. 5. The inner-distributed water-type flexible dust collector device according to claim 1 or 4, wherein the angle between the small hole or groove on the tube and the horizontal direction is greater than 0° and less than 90°. 6. The inner-distributed water-type flexible dust-collecting pole device according to claim 5, wherein the distance between the pair of flexible dust-collecting poles is between 20-80mm.