Water-saving honeycomb demister

Abstract

The utility model relates to a water-saving honeycomb demister, which comprises a cylinder body with an opening at the upper end and a bottom plate fixed at the lower end and a plurality of breathable filter cartridges arranged inside the cylinder body, each breathable filter cartridge comprises a filter cartridge bottom plate, a filter cartridge top plate and a plurality of support rods for connecting the filter cartridge bottom plate and the filter cartridge top plate, and the filter cartridge bottom plate is connected onto the bottom plate. A waterproof breathable film is arranged between the filter cartridge bottom plate and the filter cartridge top plate in a surrounding mode and supported by the supporting rods to form an inner space of the breathable filter cartridge. Water mist in delay can be basically intercepted through the arranged waterproof breathable film, water loss is reduced, the overall corrosion resistance and temperature influence resistance of the demister are greatly improved through the bearing structural part made of polytetrafluoroethylene materials, the overall quality is greatly reduced through the thin film materials, and due to the arrangement of the connecting plate, the service life of the demister is prolonged, and the service life of the demister is prolonged. And the overall structural strength is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas environment treatment, and particularly relates to a water-saving honeycomb demister. Background Art

[0002] During the operation of the absorption tower in the wet flue gas purification process, the discharged flue gas contains a large amount of moisture and forms "fog" with a particle size of 10 - 60 microns. This fog not only contains a large amount of moisture, but also dissolves sulfuric acid, nitric acid, sulfates, nitrates, etc. that are not completely removed. If untreated, it will stain and corrode subsequent equipment and cause a large amount of water loss. Therefore, the gas at the outlet of the absorption tower in the wet flue gas purification process needs to be demisted before leaving the tower body and entering the atmosphere.

[0003] Most of the existing technologies for flue gas demisting use the gravity principle, such as the demister with the publication number CN218687985U. This demister is a sealed device. When the flue gas with droplets enters the narrow and tortuous channels formed by the herringbone plates, due to the streamline deflection, centrifugal force is generated to separate the droplets. The droplets hit the plates, and part of them adhere to the plate walls to form a liquid film, which slowly flows down and converges into larger droplets and falls, thus realizing gas-liquid separation.

[0004] When the existing ridge-type demister is in use, due to the gravity centrifugal principle, it cannot completely intercept the smaller fog-like droplets, and there are still many droplets discharged into the atmosphere with the flue gas, forming white fog and causing visual pollution. At the same time, the discharge of a large amount of water vapor causes waste of water resources. After the demisting plate of the existing demister is used for a long time, a large amount of water stains and various crystalline scale will adhere to the surface of the demisting plate, which will seriously affect the demisting efficiency of the demisting plate in severe cases and does not meet people's usage requirements. Therefore, a new type of water-saving and scale-proof demister is needed. Utility Model Content

[0005] Aiming at the problems existing in the prior art, the purpose of the design of the present utility model is to provide a water-saving honeycomb demister, which is specifically realized through the following technical solutions:

[0006] A water-saving honeycomb demister includes a cylinder with an upper end opening and a bottom plate fixed at the lower end, and a plurality of breathable filter cartridges arranged inside the cylinder. The breathable filter cartridge includes a filter cartridge bottom plate, a filter cartridge top plate, and a plurality of support rods connecting the filter cartridge bottom plate and the filter cartridge top plate. The filter cartridge bottom plate is connected to the bottom plate, and a waterproof and breathable membrane is enclosed between the filter cartridge bottom plate and the filter cartridge top plate. The waterproof and breathable membrane is supported by the support rods to form the internal space of the breathable filter cartridge.

[0007] Among them, the support rods, the filter cartridge bottom plate and the filter cartridge top plate are all made of polytetrafluoroethylene material, which is convenient for improving the heat resistance and corrosion resistance of the product.

[0008] Furthermore, the breathable filter cartridge is a standard regular hexahedron, and the outer edge of the filter cartridge bottom plate is larger than the outer edge of the filter cartridge top plate. Multiple breathable filter cartridges are combined into a honeycomb structure.

[0009] Furthermore, there is a gap of 100 - 300 mm between multiple breathable filter cartridges. Adjacent breathable filter cartridges are connected by a connecting plate, and the connecting plate is connected to the adjacent filter cartridge top plate by screws.

[0010] Furthermore, the waterproof and breathable membrane is a hydrophobic porous membrane with a membrane thickness of 0.1 - 0.4 microns, a pore diameter of 50 - 100 nanometers, and an air permeability of 50 - 90%. This 50 - 100 - nanometer porous membrane can intercept the crystalline salts in the flue gas, such as calcium sulfite particles, to prevent the formation of gypsum rain.

[0011] Furthermore, the hydrophobic porous membrane is selected from PP non - woven fabric films coated with polytetrafluoroethylene, and the height of the waterproof and breathable membrane is 200 - 600 mm.

[0012] Furthermore, a layer of wire mesh is provided on the outer surface of the PP non - woven fabric film.

[0013] Furthermore, the side length of each side of the breathable filter cartridge is 300 - 600 mm.

[0014] In this utility model, the water mist in the flue gas can be basically intercepted by the provided waterproof and breathable membrane, reducing water loss. By using load - bearing structural parts made of polytetrafluoroethylene, the overall corrosion resistance and temperature resistance of the demister are greatly improved, and the use of thin - film materials significantly reduces the overall mass. The setting of the connecting plate greatly improves the overall structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is Figure 1 the top - view structure diagram of

[0017] Figure 3 is Figure 1 the bottom - view structure diagram of

[0018] In the figure, 1 - bottom plate, 2 - cylinder body, 3 - breathable filter cartridge, 301 - filter cartridge bottom plate, 302 - filter cartridge top plate, 303 - waterproof and breathable membrane, 4 - gap, 5 - connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes this utility model with reference to the accompanying drawings of the specification for a better understanding of the technical solution.

[0020] As shown in Figures 1-3As shown in the figure, a water-saving honeycomb demister includes a cylinder body 2 with an upper opening and a bottom plate 1 fixed at the lower end, and a plurality of breathable filter cartridges 3 screwed inside the cylinder body 2. The breathable filter cartridges 3 connected by bolts are convenient for disassembly and assembly, and are easy to clean and maintain. Each breathable filter cartridge 3 is in the shape of a regular hexagon, the side length of each side of the breathable filter cartridge 3 is 300 - 600 mm, there is a gap 4 of 100 - 300 mm between adjacent breathable filter cartridges 3, and adjacent breathable filter cartridges 3 are connected by a connecting plate 5. Specifically, the connecting plate 5 is arranged at the top of adjacent breathable filter cartridges 3. The setting of the connecting plate 5 can greatly improve the overall structural strength of the demister. A plurality of breathable filter cartridges 3 are connected by a plurality of connecting plates 5 to form a honeycomb structure. This honeycomb combination method can meet the needs of different flue gas flow rates from small to large.

[0021] The breathable filter cartridge 3 includes a filter cartridge bottom plate 301, a filter cartridge top plate 302, and a plurality of support rods connecting the filter cartridge bottom plate 301 and the filter cartridge top plate 302. The filter cartridge bottom plate 301 is connected to the bottom plate 1, the outer edge of the filter cartridge bottom plate 301 is larger than the outer edge of the filter cartridge top plate 302, and a waterproof breathable membrane 303 with a height of 200 - 600 mm is enclosed between the filter cartridge bottom plate 301 and the filter cartridge top plate 302. The waterproof breathable membrane 303 is supported by the support rods to form the internal space of the breathable filter cartridge. Among them, the bottom plate 1, the filter cartridge bottom plate 301, the filter cartridge top plate 302, and the support rods are all made of polytetrafluoroethylene material. Through the heat-resistant and corrosion-resistant characteristics of polytetrafluoroethylene, the bottom plate 1, the filter cartridge bottom plate 301, the filter cartridge top plate 302, and the support rods will not deform even when they are in a high-humidity and corrosive environment for a long time, improving the service life of the demister.

[0022] The waterproof breathable membrane 303 is a hydrophobic porous membrane, specifically a PP non-woven fabric film coated with tetrafluoroethylene, with a film thickness of 0.1 - 0.4 microns, a pore diameter of 50 - 100 nanometers, and a gas permeability of 50 - 90%. This breathable membrane can intercept a large amount of water mist and retain the crystalline salts of the flue gas, such as calcium sulfite particles, prevent the formation of gypsum rain, save water resources, and ensure sufficient air permeability, so that the flue gas resistance of the demister is within a controllable range. At the same time, because the thickness of the used membrane is only 0.1 - 0.4 microns, the overall quality of the demister is greatly reduced. To improve the strength, a layer of wire mesh is arranged on the outer surface of the PP non-woven fabric film.

[0023] In the present invention, the flue gas enters the corresponding breathable filter cartridge 3 through the air inlet arranged on the bottom plate 1, and the clean flue gas discharges to the surroundings through the waterproof breathable membrane 303 surrounded by the peripheral wall of the breathable filter cartridge 3. During the process of discharging the flue gas, the inner wall of the waterproof breathable membrane 303 intercepts the water mist, and the water mist is compounded into large water droplets by its own impact and falls into the absorption tower. At the same time, the crystalline salt particles with a particle size greater than 100 nanometers are intercepted and returned to the absorption tower.

Claims

1. A water-saving honeycomb demister, characterized in that, It includes a cylinder (2) with an open upper end and a bottom plate (1) fixed at the lower end, and a plurality of breathable filter cartridges (3) arranged inside the cylinder (2). The breathable filter cartridge (3) includes a filter cartridge bottom plate (301), a filter cartridge top plate (302), and a plurality of support rods connecting the filter cartridge bottom plate (301) and the filter cartridge top plate (302). The filter cartridge bottom plate (301) is connected to the bottom plate (1), and a waterproof and breathable membrane (303) is enclosed between the filter cartridge bottom plate (301) and the filter cartridge top plate (302). The waterproof and breathable membrane (303) is supported by the support rods to form the internal space of the breathable filter cartridge.

2. The water-saving honeycomb demister according to claim 1, characterized in that The breathable filter cartridge (3) is a regular hexagon, and the outer edge of the filter cartridge bottom plate (301) is larger than the outer edge of the filter cartridge top plate (302).

3. The water-saving honeycomb demister according to claim 1, characterized in that A gap (4) of 100 - 300 mm is left between the plurality of breathable filter cartridges (3), and adjacent breathable filter cartridges (3) are connected by a connecting plate (5). The connecting plate (5) is connected to the adjacent filter cartridge top plate (302) by screws.

4. The water-saving honeycomb demister according to claim 1, characterized in that The waterproof and breathable membrane (303) is a hydrophobic porous membrane with a membrane thickness of 0.1 - 0.4 microns, a pore diameter of 50 - 100 nanometers, and an air permeability of 50 - 90%.

5. The water-saving honeycomb demister according to claim 4, wherein The hydrophobic porous membrane is selected from a PP non-woven fabric film coated with tetrafluoroethylene, and the height of the waterproof and breathable membrane is 200 - 600 mm.

6. The water-saving honeycomb demister according to claim 5, characterized in that A layer of wire mesh is arranged on the outer surface of the PP non-woven fabric film.

7. The water-saving honeycomb demister according to claim 2, characterized in that The side length of each side of the breathable filter cartridge (3) is 300 - 600 mm.

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