JPS6026585B2 - Electric dust collector dust collector plate cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a dust collector plate cleaning device for an electrostatic precipitator.

(Prior Art) Conventionally, in this type of cleaning device, a method in which water or the like is jetted out from a small hole, a method in which water etc. is overflowed from a groove-shaped groove, etc. have been common.

On the other hand, in order to reduce pollution caused by wastewater and save water,
It has become necessary to use cleaning water repeatedly. In this case, with the conventional method, impurities contained in the water increase and adhere, resulting in blockage of the spout or uneven height of the overflowing part, and as a result, it has become difficult to operate the electrostatic precipitator. . For this reason, in overflow type devices,
Since the dust collection plate is washed in stripes, which causes inconvenience, the dust collection plate is made into a groove shape, which is cumbersome as the entire surface of the dust collection plate has to be washed intermittently by being overturned, and it is difficult to get wet with oily smoke. When processing gases containing substances or sticky substances, it becomes impossible to continuously clean the entire surface of the dust collecting plate, which causes problems due to the accumulation of dust on the surface of the collecting plate. Furthermore, in the cleaning water supply pipe that forms a water film on the surface of the dust collection plate, the amount of water ejected decreases as it goes downstream due to head loss in the supply pipe, so the thickness of the water film is not uniform. There was a drawback.

(Problems to be Solved by the Invention) It is an object of the present invention to provide a dust collection plate cleaning device that is free from the disadvantages and drawbacks of these conventional methods, has high dust collection efficiency, and is inexpensive. .

(Means for Solving the Problem) In order to achieve the above-mentioned object, the dust collecting plate cleaning device of the present invention has a cross-sectional shape that is suitably concave at the top and is in close contact with the dust collecting plate at the lower end. A dispersion plate curved so as to have a substantially heart-shaped shape is attached to the upper edge of the dust collection plate over its entire length via a support member covered by the dispersion slope member. } A cleaning liquid supply pipe having an appropriate number of outflow holes is arranged on the concave portion at the top of the dispersion slope member along the upper ridge of the dust collecting plate.

(Function) The cleaning liquid locally flows out from the outflow hole of the cleaning liquid supply pipe and flows into the recess at the top of the distribution plate member.

Although there is a difference in the amount of liquid flowing out from each outflow hole due to head loss in the cleaning liquid supply pipe, it is dispersed horizontally along the upper green part of the dust collection plate in the concave area, mixed and averaged, and forms a liquid film. When it crosses over the convex arc surface of the dispersion plate member, which has an almost heart-shaped cross-sectional shape, its thickness is equalized.
The liquid forms a continuous film that flows down evenly over the entire surface of the dust collecting plate, preventing dust from adhering to the collecting plate and cleaning it. Since the support member is covered by the dispersion plate member, dust, mist, etc. do not adhere to the support member and cause corrosion. (Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In the drawings, reference numeral 1 denotes a dust collecting plate, which is provided with reinforcing beams 2 on both sides of its upper twill.

3, 3 is a support bracket having an L-shaped cross section, the vertical pieces 4, 4 of which are fixed to the outer surfaces of the reinforcing beams 2, 2 by bolts 6, nuts 7, and washers 8, and 5, 5 are support brackets. 3.3 horizontal pieces.

Reference numerals 9 and 9 denote a pair of dispersion plates, and by fixing the substantially horizontal top portions 10, 10 of each dispersion plate 9, 9 to the upper surface of the horizontal pieces 5, 5 of the support brackets 3, 3, the dispersion plate 9 ，
9 indicates reinforcement beams 2, 2, support brackets 3, 3, bolts 6,
It is attached to the upper green part of the dust collecting plate 1 over its entire length, covering the nut 7, washer 8, etc.

The top parts 10, 10 of the dispersion plates 9, 9 are horizontal, and the lower ends 11, 11 are vertical so as to be in close contact with the dust collecting plate 1. The portion between the horizontal top portions 10, 10 and the vertical lower end portions 11, 11 of the dispersion plates 9, 9 is curved into a convex arcuate opening so as to form a heart-shaped lower portion. 12 is a gap formed between the vertical pieces 4, 4 of the support brackets 3, 3;
3 is a closing plate disposed on the dispersion plates 9, 9 so as to close the upper part of the gap 12, the cross-sectional shape of which is appropriately concave in the center, and has convex fox faces on both sides; It is curved to form a heart-shaped top.

The dispersion plates 9, 9 and the closing plate 13 form a dispersion slope member having a substantially heart-shaped cross section. Reference numeral 14 denotes a cleaning liquid supply pipe, which is disposed above the central concave portion of the blocking plate 13, that is, on the concave portion at the top of the dispersion slope member along the upper ridge of the dust collecting plate 1.

Reference numeral 15 designates relatively large-diameter outflow holes opened obliquely downward to the south outside at appropriate intervals along the length of the cleaning liquid supply pipe 14.

FIG. 3 is an explanatory view showing the process of attaching the dispersion plate 9 to the upper green part of the dust collecting plate 1 in order to bring the lower end 11 of the dispersion plate 9 into close contact with the bag dust plate 1.

The angle between the vertical piece 4 and the horizontal piece 5 of the support bracket 3 is set in advance to be slightly smaller than a right angle, and an elastically deformable corrugated part is formed at the lower end of the vertical piece 4. A groove-shaped notch 17 that engages with 16 from above
is formed. The top part 10 of the dispersion plate 9 is placed on the upper surface of the horizontal piece 5 of the support bracket 3 formed as described above,
It is fixed by an appropriate fixing means. The lower end of the vertical piece 4 of the support bracket 3 is press-fitted into the gap between the washer 8 and the reinforcing beam 2 created by tightening the nut 7 of the bolt 6 with the spacer 16 and the washer 8 interposed, and the notch 17 When engaged with the base plate 16, its corrugated portion is elastically deformed and firmly inserted into the foundation while maintaining its elasticity, and the dispersion plate 9 is attached to the upper edge of the dust collection plate 1. When the dispersion plate 3 is installed as described above, the angle between the vertical piece 4 and the horizontal piece 5 of the support bracket 3 is elastically deformed to be a right angle through the reinforcing beam 2, so that the dispersion is Board 9
Springback occurs, and the vertical lower end 11 of the dispersion plate 9 comes into elastic pressure contact with the dust collection plate 1. The dust collecting plate cleaning device is constructed as described above, and when cleaning liquid, for example, cleaning water, is supplied to the cleaning liquid supply pipe 14 via a pump (not shown), the cleaning water flows through the outflow holes 15 at appropriate intervals. It flows out locally and flows into the recessed part of the closing plate 13.

Although there is a difference in the amount of water flowing out from each outflow hole 15 due to head loss in the cleaning liquid supply pipe 14, the water is dispersed in the horizontal direction along the upper green part of the dust collection plate 1 in the recess, mixed and averaged, It becomes a film of water, and when it crosses the convex arc surface A of the blocking plate 13 and the convex arc surface opening of the dispersion plate 9, its thickness is equalized, and it becomes a continuous water film, forming a continuous layer of water on the dust collecting plate 1. Cleaning is performed by preventing dust from adhering to the dust collecting plate 1 while flowing down the entire surface uniformly without waste. Since the support part consisting of the support bracket 3, reinforcing beam 2, bolt 6, nut 7, washer 8, etc. is covered by the dispersion plate 9, dust, mist, etc. will not adhere to the support member and cause corrosion. Therefore, it can be used safely for a long period of time. Since the outflow hole 15 is 5 to 1 mm larger than the nozzle diameter of 0.5 to 2 mm in the spray method, there is less risk of blockage due to impurities in the cleaning water, and a large amount of cleaning water can be sprayed once or twice a day for a short period of time. If the holes are cleaned by squirting water, they will not become clogged even after long-term use. In addition, in the spray method, even if dust and mist are collected between the dust collection slopes, if cleaning water is sprayed at the top stage, the gas flowing out from the dust collector will carry out the mist.

Furthermore, even in the tumbling method, the generation of water droplets during tumbling is unavoidable, resulting in the same result as above. In addition, in both the above-mentioned fin fog method and the falling method, the density of water droplets between the collecting slopes increases, and as a result, the spatial electrical resistance decreases, and discharge occurs between the dust collecting plate and the electrode. , leading to a decrease in dust collection effectiveness. Furthermore, an increase in the amount of mist being carried out from between the dust collecting plates due to the gas to be treated causes the dust adsorbed to the mist to be carried out, resulting in a further decrease in dust collection efficiency. In contrast, in the cleaning device of the present invention, the cleaning water forms a continuous water film with an even thickness at all times over the entire surface of the dust collecting plate without any waste, without causing water droplets to splash between the dust collecting plates. Because the dust flows downward, there is no reduction in dust collection efficiency due to electrical discharge as in conventional methods, and even when processing gases that contain substances such as oil smoke that are difficult to wet with water or sticky asphalt, etc.
Dust does not adhere to the dust collecting plate, and the dust once collected in the water film does not scatter again and can be completely cleaned and collected.

For this reason, mist and dust are not carried away by the gas to be treated from between the dust collecting plates, so that the dust collection efficiency is higher than that of the conventional method described above. The gas to be treated generally contains corrosive gas and dust, but since the entire surface of the dust collecting plate is always covered with a water film and kept clean, corrosion of the dust collecting plate can be prevented. In addition, when the gas to be treated is acidic, an alkaline solution is used as the cleaning liquid, and in the case of alkaline gas, the acidic solution is used as the cleaning liquid to actively prevent corrosion of the dust collection plate, and at the same time, to absorb the gas. You can also expect good results. Since the dispersion plate 9 is constructed so that its lower end 11 is in close contact with the dust collecting plate 1, the dispersion plate 9 is made of a thin and bendable material and can be easily curved, and its lower end can be welded or riveted. Since it is not necessary to fix the dust collecting plate 1 to the dust collecting plate 1 by means of such methods, the dust collecting plate 1 can be manufactured at a low cost. On the other hand, in the case of the conventional tipping type, in addition to the tipping device, a mirror-like overflow part must be precisely machined on one side wall, which requires expensive thick wall parts. It required precision machining and was inevitably expensive. The present invention is not limited to the illustrated embodiment; instead, the vertical portion at the lower end of the dispersion plate is omitted, and the lower end is brought into close contact with the dust collecting plate using a caulking agent without relying on elasticity. It goes without saying that it is within the scope of the present invention to fill the gap 12 with a caulking agent or the like, recess the upper surface appropriately, and omit the cover plate 13.
(Effect of the invention) As is clear from the above explanation, the present invention provides
All the disadvantages and shortcomings of the conventional method can be solved, and a dust collecting plate cleaning device with high dust collection efficiency and low cost can be obtained.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with the first figure being a perspective view and the second figure being a perspective view.
The figure is a sectional view of the main part, and FIG. 3 is an explanatory diagram of the dispersion plate mounting process. 1: Dust collection plate, support member (2: reinforcement beam, 3: support bracket, 6: bolt, 7: nut, 8: washer), dispersion plate member (9: dispersion plate, 13: closing plate), 14: cleaning liquid Supply pipe, 15: Outflow hole. Tsutomu Figure 1 Figure 2 Tsutomu Figure 3

Claims (1)

[Claims] 1. A dispersion plate member whose cross-sectional shape is appropriately concave at the top and curved to have an almost heart-shaped cross-sectional shape that is in close contact with the dust collection plate at the lower end is covered by the dispersion plate member. A cleaning liquid supply pipe having an appropriate number of outflow holes is attached to the upper edge of the dust collecting plate over its entire length via a support member, and is connected to the upper edge of the dust collecting plate on the recessed portion of the top of the distribution plate member. A dust collecting plate cleaning device for an electrostatic precipitator, characterized in that it is arranged along the line.