Filter cloth brush glue to prevent washing short circuit

Abstract

The utility model discloses a filter cloth glue brushing device capable of preventing short circuit during washing, which increases the filter cloth glue brushing surface, makes the filter cloth glue brushing surface completely cover the filter cake, makes the filter cloth permeation point break, cannot pass through the washing liquid, forces the washing liquid to change the washing path, makes it pass through the place with filter cake or thick filter cake, reduces the dosage of the washing liquid, and improves the economic benefit of enterprises.

Description

Technical Field

[0001] This utility model belongs to the field of filtration equipment (fluid machinery) in solid-liquid separation process, and relates to a method for brushing adhesive on filter cloth during the washing of a filter press. Background Technology

[0002] A filter press is a general-purpose solid-liquid separation device widely used in industries such as chemical, metallurgy, pharmaceutical, dye, food, brewing, ceramics, and environmental protection. Filter plates and filter cloth are the core filtration elements of a filter press. The filter cloth adheres tightly to the surface of the filter plates to filter the material. The filter plates are arranged and installed on the crossbeam of the filter press, with the recesses of two filter plates forming a filter chamber. The filtration process is as follows: Filter material is input under external pressure through the feed port of the filter chamber for low-pressure filtration. The filter cloth traps particles in the material to form a filter cake. The filtrate flows out through the liquid outlet of the filter chamber or a water outlet nozzle. The filter chamber carries the filter cake. After feeding, for models that require filter cake washing, washing liquid is introduced through a pipe. After the washing liquid cleans the filter cake, the water in the filter cake is squeezed out. Finally, the filter plates are pulled apart to achieve gravity discharge of the residue.

[0003] The existing filter presses have the following defects: In models that require filter cake washing, the washing liquid passes directly through the filter cloth at the edge of the filter chamber where there is no filter cake, short-circuit back to the pipeline, and does not wash the filter cake. This results in a large loss of washing liquid, which increases the amount of washing liquid used and affects the improvement of the company's economic benefits. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the washing process of existing filter presses, solve the corresponding technical problems, increase the adhesive surface of the filter cloth, and make the adhesive surface of the filter cloth completely cover the filter cake, thereby breaking the permeation points of the filter cloth and preventing the washing liquid from passing through. This forces the washing liquid to change its path and pass through the area with filter cake or thick filter cake, thereby improving washing efficiency and reducing energy consumption.

[0005] Furthermore, the increase in the adhesive application area of ​​the filter cloth is specifically reflected in the following aspects: 1. Increasing the contact width between the filter cloth and the sealing surface of the filter plate, that is, increasing the width of the adhesive application ring around the filter cloth. On the basis of the original sealing surface of the filter plate, the width of the adhesive application on the filter cloth is widened. The width of the adhesive application around the filter cloth is (20-30) mm wider than the sealing surface of the filter plate, ensuring that the adhesive application surface of the filter cloth completely covers the filter cake; 2. Applying adhesive to the support points of the filter plate and around them. The adhesive application range is based on the diameter of the support points of the filter plate, which is 1.75 times the diameter of the support points. This ensures that the support points are fully covered and the extension is long enough to contact the filter cake, ensuring that the washing liquid penetrates the filter cake; 3. Applying adhesive around the seam of the feed hole of the filter cloth, allowing the adhesive to be applied to the outside of the feed hole, extending at least 1.4 times the diameter of the feed hole. The washing liquid will not flow when the adhesive is applied to the feed hole, and will penetrate to the area with the filter cake, reducing the wasted effort of the washing agent and increasing the washing efficiency.

[0006] This utility model provides a filter cloth adhesive brush to prevent short circuits during washing. It has the advantages of simple structure, novel concept, energy saving and efficiency improvement, reducing the amount of washing liquid used and improving the economic benefits of enterprises. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the adhesive application method for filter cloth to prevent short circuits during washing, according to the present invention.

[0008] Attached reference numerals: 1-Filter cloth brushed with adhesive, 2-Filter plate sealing frame, 3-Filter plate support point, 4-Feed hole, 5-Washing liquid inlet hole, 6-Matching channel, 7-Washing hole. Detailed Implementation

[0009] The technical solutions of this utility model will be described below with reference to the accompanying drawings of an embodiment of the anti-short-circuit filter cloth adhesive application method. Obviously, the described embodiments are only a portion of the preferred embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model. Example

[0010] A filter cloth adhesive application method prevents short circuits during washing, increases the adhesive application area, and alters the flow direction of the washing liquid during filter cake washing, thus saving energy and increasing efficiency. The adhesive-coated surface 1 of the filter cloth is tightly attached to the filter plate sealing surface. The width of the adhesive-coated surface is greater than the filter plate sealing frame 2 and completely covers the filter cake in the filter chamber. The width of the filter plate sealing frame 2 is used to measure the adhesive-coated surface 1. At locations corresponding to the filter plate support points 3, the filter cloth must also be coated with adhesive. The adhesive application area is based on the diameter of the filter plate support point 3 and must be larger than the support point and contact the filter cake around the support point. The feed hole 4 is formed by sewing a rectangular adhesive-coated filter cloth onto two separate filter cloths, creating a connected whole. The two long sides of the rectangular adhesive-coated filter cloth are sewn to the central openings of the two filter cloths. The filter cloths are integrated into one piece; adhesive is applied around the circular holes of the two filter cloths, with the diameter of the adhesive ring being 1.4 times the diameter of the filter cloth holes to prevent the washing liquid from penetrating the filter cloth. The width of the rectangular adhesive-coated filter cloth is based on the thickness of the filter plate's feed hole, with appropriate allowance; washing inlet hole 5 is the hole for the washing liquid to enter the filter plate. The washing liquid flows into the washing inlet hole 5 of the filter plate through a pipe. At the same time, the filter cloth closely attached to this point has a hole of the same size as the filter plate, allowing the washing liquid to pass through each filter plate; the washing liquid flows out from the washing hole 7 through the washing inlet hole of each filter plate and then through the filter plate washing water collection channel 6, rinsing the filter cake in the filter chamber, thus achieving the function of washing the filter cake; the washing liquid flows out from the washing hole 7, i.e. Figure 1 On the right side, it passes horizontally through the filter cake in the filter chamber, carrying away the residue in the filter cake. After passing through the washing inlet hole on the left side of the next filter plate, it enters the pipeline to realize the filter cake washing process.

[0011] Washing and blowing are different operating processes of filter presses, but their principles are basically the same. Therefore, the above method of applying adhesive to filter cloth is also applicable to blowing.

Claims

1. A filter cloth adhesive to prevent short circuits during washing, characterized in that, The width of the adhesive-coated surface of the filter cloth is greater than the sealing edge of the filter plate, and the adhesive-coated surface of the filter cloth covers the filter cake; adhesive is applied to the filter plate support points and around them, and the area of ​​adhesive application is greater than the filter plate support points and contacts the filter cake around the support points; adhesive is applied around the seam of the filter cloth feed hole to force the washing liquid to change its path and pass through the area with filter cake or thick filter cake.

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