Composite filter screen block of demister

Abstract

The utility model relates to the technical field of gas-liquid separation, in particular to a composite filter screen block of a demister, which comprises a composite filter screen layer, a grating and a distance rod, and is characterized in that the composite filter screen layer is formed by alternately inserting and stacking a plurality of layers of metal nets and a plurality of layers of non-metal nets. According to the novel design provided by the utility model, the metal net in the composite filter screen block supports the non-metal net, so that the non-metal net is not easy to deform, the elasticity of the net block is increased, and the net block is resistant to high temperature; the net blocks are not prone to thermal shrinkage deformation in a high-temperature environment, gas short circuit is avoided, and the service life of the net blocks can be effectively prolonged; due to the fact that the metal net supports the non-metal net, the specific surface area of the wire mesh demister can be increased by reducing the diameter of wires when materials with the same weight are used, and the defoaming efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation, in particular to a composite filter screen block for a demister. Background Art

[0002] The wire mesh demister is a gas-liquid separation device. The existing wire mesh demister consists of a gas-liquid filter mesh pad (the larger mesh pad is composed of several mesh blocks, and the smaller mesh pad can be a mesh block) and a support. The mesh block is composed of several layers of flat wire mesh, grilles and fixed distance rods. The wire mesh is a gas-liquid filter mesh made of various metal or non-metallic materials. The wire mesh demister can not only filter out larger liquid foam suspended in the airflow, but also filter out smaller and tiny liquid foam. Generally, a wire mesh demister is installed on the top of the tower, which occupies less space in the tower and can effectively remove droplets of 3-5um. The wire mesh demister is mainly used for gas-liquid separation and is now widely used in gas-liquid separation devices in chemical, petroleum, sulfuric acid, medicine, light industry, metallurgy, machinery, and environmental protection.

[0003] At present, the wire mesh of the wire mesh demister is usually made of metal materials or non-metallic plastics such as polypropylene and polytetrafluoroethylene; the wire mesh of metal materials is relatively heavy, has poor corrosion resistance and short service life; the wire mesh of plastic non-metallic materials such as polypropylene and polytetrafluoroethylene is not resistant to high temperature and has low strength. In a high temperature environment, the mesh blocks made of plastic non-metallic materials are prone to heat shrinkage and deformation, forming a gas short circuit, which reduces the defoaming efficiency and cannot be used for high temperature gases in industries such as metallurgy. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and provide a composite filter mesh block for a demister. The metal mesh in the composite filter mesh block supports the non-metal mesh, making it resistant to high temperatures. In a high temperature environment, the mesh block is not easily deformed by heat shrinkage, thereby avoiding gas short circuit, improving the defoaming efficiency and extending the service life.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A composite filter screen block for a demister comprises a composite filter screen layer, a grid and a distance rod, and is characterized in that the composite filter screen layer is composed of several layers of metal screens and several layers of non-metal screens, which are alternately interlaced and stacked.

[0007] The composite filter mesh layer is composed of at least one metal mesh layer and several more non-metal mesh layers than the metal mesh layers.

[0008] The composite filter mesh layer is composed of at least one layer of non-metal mesh and several layers of metal mesh which are more than the number of non-metal mesh layers.

[0009] The metal mesh and non-metal mesh in the composite filter layer are wire mesh woven from monofilaments or twisted wires, or are different types of plate mesh made of metal or non-metal plates.

[0010] The metal mesh in the composite filter mesh layer is a corrugated metal mesh.

[0011] The non-metallic mesh in the composite filter layer is made of organic polymer material, inorganic material, carbon fiber material, ceramic fiber material or glass fiber material.

[0012] The metal material of the metal mesh in the composite filter layer includes austenitic stainless steel, ferritic stainless steel, high silicon stainless steel and high alloy stainless steel.

[0013] The surface of the metal mesh in the composite filter mesh layer is provided with an anti-corrosion layer made of anti-corrosion material.

[0014] When the metal mesh in the composite filter layer is woven with metal monofilaments or twisted wires, the cross-sectional diameter of each metal monofilament is in the range of 0.1mm to 3mm; when the non-metal mesh is woven with non-metal monofilaments or twisted wires, the cross-sectional diameter of each non-metal monofilament is in the range of 0.003mm to 0.8mm.

[0015] The thickness of the composite filter mesh layer is 50 mm to 500 mm.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The new design provided by the utility model has the following advantages: the metal mesh in the composite filter mesh block supports the non-metal mesh, making it less likely to deform, increasing the elasticity of the mesh block and making it resistant to high temperatures; the mesh block is less likely to shrink and deform in a high-temperature environment, avoiding gas short-circuiting and effectively prolonging its service life; because of the support of the metal mesh, the non-metal mesh can increase the specific surface area of the wire mesh demister by reducing the diameter of the wire when using materials of the same weight, thereby improving the defoaming efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application.

[0019] Figure 1 This is a structural diagram of a composite filter screen block for a defoamer according to the present invention;

[0020] In the figure: 1. composite filter mesh layer, 2. distance rod, 3. grille, 4. metal mesh, 5. non-metal mesh. DETAILED DESCRIPTION

[0021] The present invention is further described below through examples. The examples are for further illustrating the features of the present invention and are not equivalent to limiting the present invention. Any changes made by those skilled in the art in accordance with the present invention should be included in the scope of protection of the present invention.

[0022] Figure 1 This is a structural schematic diagram of Example 1 of the utility model with better effect. The utility model provides a demister composite filter mesh block, including a composite filter mesh layer 1, a grille 3, and a distance rod 2, and is characterized in that: the composite filter mesh layer 1 is composed of several layers of metal mesh 4 and several layers of non-metal mesh 5, which are formed by alternating the metal mesh 4 and the non-metal mesh 5 and overlapping them, and has a multi-layer structure; in this mesh block, the metal mesh forms a support for the non-metal mesh, making the composite filter mesh block less likely to deform, increasing the elasticity of the mesh block, avoiding gas short circuit, and effectively improving its service life; because of the support of the metal mesh, the non-metal mesh can increase the specific surface area of the wire mesh demister by reducing the diameter of the wire when using materials of the same weight, thereby improving the defoaming efficiency.

[0023] Example 2 of the present application is a simplified example of Example 1, and the composite filter mesh layer 1 is composed of at least one layer of metal mesh 4 and several more layers of non-metal mesh 5 than the metal mesh 4.

[0024] Example 3 of the present application is another simplified example of Example 1, and the composite filter mesh layer 1 is composed of at least one layer of non-metallic mesh 5 and several more layers of metal mesh 4 than the number of non-metallic mesh 5 layers.

[0025] Furthermore, the metal mesh 4 and non-metal mesh 5 in the composite filter layer 1 described in Example 1, Example 2, and Example 3 can be wire mesh woven from single filaments or twisted wires, or different types of plate mesh made of metal or non-metal plates.

[0026] Furthermore, the metal mesh 4 in the composite filter mesh layer 1 is a corrugated metal mesh.

[0027] Furthermore, the non-metallic mesh 5 in the composite filter layer 1 is made of organic polymer materials, inorganic materials, carbon fiber materials, ceramic fibers or glass fibers, and may also be various types of fluoroplastics.

[0028] Furthermore, the metal material of the metal mesh 4 in the composite filter mesh layer 1 includes austenitic stainless steel, ferritic stainless steel, high silicon stainless steel, and high alloy stainless steel.

[0029] Preferably, the surface of the metal mesh 4 in the composite filter layer 1 has an anti-corrosion layer made of an anti-corrosion material. The material of the anti-corrosion layer is a polymer material or fluoroplastic, and can also be an anti-corrosion layer of various types of ceramics.

[0030] Preferably, when the metal mesh 4 in the composite filter layer 1 is woven with metal monofilaments or twisted wires, the cross-sectional diameter of each metal monofilament is in the range of 0.1 mm to 3 mm, and when the non-metal mesh 5 is woven with non-metal monofilaments or twisted wires, the cross-sectional diameter of each non-metal monofilament is in the range of 0.003 mm to 0.8 mm.

[0031] Preferably, the mesh thickness of the composite filter mesh layer 1 is 50 mm to 500 mm; the shape of the composite filter mesh block can be a flat rectangular, circular, annular, crescent-shaped, half-crescent-shaped or rectangular mesh block with one side being an arc of the mesh thickness, and the composite filter mesh block can also be V-shaped; when the mesh block shape of the demister is a flat mesh block, the demister produced is a flat standard demister; when the mesh block shape of the demister is a V-shaped mesh block, the demister produced is a corrugated demister. Those skilled in the art should know that the shape of the above-mentioned composite filter mesh block is only exemplary, and the size and shape of the mesh block can also be determined according to the size of the space in the equipment to be installed and the manhole size of the equipment, and this application does not impose any restrictions on this.

[0032] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A composite filter screen block for a demister, comprising a composite filter screen layer (1), a grid (3), and a distance rod (2), characterized in that: The composite filter layer (1) is composed of several layers of metal mesh (4) and several layers of non-metal mesh (5), which are formed by alternately interlacing and stacking the metal mesh (4) and the non-metal mesh (5).

2. The composite filter screen block for a demister according to claim 1, characterized in that: The composite filter mesh layer (1) is composed of at least one layer of metal mesh (4) and several more layers of non-metal mesh (5) than the metal mesh (4).

3. The composite filter screen block for a demister according to claim 1, characterized in that: The composite filter mesh layer (1) is composed of at least one layer of non-metal mesh (5) and a number of metal meshes (4) which are more than the number of layers of the non-metal mesh (5).

4. A composite filter screen block for a demister according to any one of claims 1 to 3, characterized in that: The metal mesh (4) and non-metal mesh (5) in the composite filter layer (1) are wire mesh woven from single filaments or twisted wires, or are different types of plate mesh made of metal or non-metal plates.

5. The composite filter screen block for a demister according to claim 4, characterized in that: The metal mesh (4) in the composite filter mesh layer (1) is a corrugated metal mesh.

6. The composite filter screen block for a demister according to claim 4, characterized in that: The non-metallic mesh (5) in the composite filter mesh layer (1) is made of organic polymer material, inorganic material, carbon fiber material, ceramic fiber material or glass fiber material.

7. The composite filter screen block for a demister according to claim 4, characterized in that: The metal material of the metal mesh (4) in the composite filter mesh layer (1) includes austenitic stainless steel, ferritic stainless steel, high-silicon stainless steel, and high-alloy stainless steel.

8. A composite filter screen block for a demister according to any one of claims 5 to 7, characterized in that: The surface of the metal mesh (4) in the composite filter layer (1) is provided with an anti-corrosion layer made of anti-corrosion material.

9. A composite filter screen block for a demister according to any one of claims 5 to 7, characterized in that: The metal mesh (4) in the composite filter layer (1) is woven with metal monofilaments or twisted wires, and the cross-sectional diameter of each metal monofilament is in the range of 0.1 mm to 3 mm. The non-metal mesh (5) is woven with non-metal monofilaments or twisted wires, and the cross-sectional diameter of each non-metal monofilament is in the range of 0.003 mm to 0.8 mm.

10. A composite filter screen block for a demister according to any one of claims 5 to 7, characterized in that: The mesh layer thickness of the composite filter mesh layer (1) is 50 mm to 500 mm.

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