Pressurized stepping filter with closed chamber

Abstract

The utility model belongs to the technical field of filtering equipment, and relates to a pressurized stepping filter with a closed chamber, which comprises a rack, a pressing device, a slurry disc, filter cloth and a carrier roller group, the filter cloth is arranged in the rack through the carrier roller group, and the filter cloth is divided into filter section filter cloth and circulation section filter cloth; the slurry disc is arranged above the filter cloth of the filter section, a slurry cavity is formed in the slurry disc, the lower part of the slurry disc is open, and an output shaft of the pressing device is connected with the slurry disc so as to drive the slurry cavity to be close to or far away from the filter cloth; and a feeding hole and / or a compressed air inlet are / is also formed in the slurry disc. According to the filter disclosed by the utility model, by integrating multiple functions of pressurized feeding, compressed air purging, vacuumizing dehydration and the like, pressurized step-by-step extrusion filtration of materials is realized, and the filtration efficiency and quality are improved.

Description

Technical Field

[0001] This utility model relates to a pressurized step filter with a closed chamber, belonging to the technical field of filtration equipment. Background Technology

[0002] With the increasing awareness of industrial environmental protection in modern society, the effective treatment of industrial waste has become a key focus of industry development. For example, in environmental protection fields such as tailings treatment and power plant gypsum desulfurization, not only is efficient separation of solid and liquid components required, but also the environmental protection and economic efficiency of the treatment process is emphasized to meet the increasingly stringent environmental regulations and the demand for resource recycling.

[0003] Traditionally, widely used solid-liquid separation equipment in industry mainly includes filter presses, vacuum filters, and ceramic filters. Within their respective applications, these devices effectively separate solid-liquid mixtures, providing crucial support for industrial production. However, with continuous advancements in industrial technology and increasingly stringent environmental standards, traditional filtration equipment has gradually revealed some limitations, particularly when processing complex materials with high water content or high viscosity, where its performance often falls short of expectations.

[0004] Taking vacuum filters as an example, as an important piece of equipment in the field of solid-liquid separation, their working principle is to use the negative pressure generated by the vacuum system to extract the liquid components in the slurry through the filter cloth, thereby achieving solid-liquid separation. However, traditional vacuum filters typically use a distributor to directly spread the slurry onto the filter cloth during feeding. This process often makes it difficult to ensure the uniformity of slurry distribution, resulting in uneven filter cake thickness. This uneven filter cake layer is prone to cracking during vacuum filtration, which not only affects the overall structural strength of the filter cake but may also lead to vacuum leakage, thereby reducing dewatering efficiency and resulting in a filter cake with a high moisture content, making it difficult to meet the requirements of subsequent processing or resource recovery.

[0005] Therefore, a pressurized step filter with a closed chamber is needed to improve the quality of solid-liquid separation.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present invention, and therefore may include information that does not constitute prior art. Utility Model Content

[0007] The purpose of this invention is to provide a pressurized step filter with a closed chamber to improve or solve the technical problems of traditional vacuum filters in terms of filter cake uniformity and filter cake moisture content control.

[0008] The technical solution provided by this utility model is as follows: A pressure-type step filter with a closed chamber includes a frame, and further includes: a pressing device, a slurry tray, a filter cloth, and a roller assembly installed on the frame; the filter cloth is arranged in the frame through the roller assembly, and the filter cloth is divided into an upper filtration section filter cloth and a lower circulation section filter cloth; the slurry tray is arranged above the filtration section filter cloth, the slurry tray has a slurry chamber, and the lower part of the slurry tray is open; the output shaft of the pressing device is connected to the slurry tray to drive the slurry tray closer to or away from the filter cloth; the slurry tray is also provided with a feed inlet.

[0009] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: The filter of this utility model is provided with a slurry tray above the filter cloth. When the material is pumped into the slurry tray through the feed port on the slurry tray by the feed pump, pressurized feeding can be achieved, which can not only ensure that the filter cake thickness is consistent, but also squeeze and filter the material.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the slurry tray is also equipped with a compressed air inlet.

[0012] The beneficial effect of adopting the above-mentioned further solution is that compressed air can be injected into the slurry tray through the compressed air inlet on the slurry tray. The compressed air will pass through the filter cake layer, carry the water inside the filter cake out of the filter cloth, and blow the material with compressed air, which will further reduce the moisture content.

[0013] Furthermore, it also includes a filter tray and a porous filter plate. The filter tray is disposed below the filter cloth of the filter section, and the porous filter plate is disposed between the filter cloth of the filter section and the filter tray. A flow channel is formed between the bottom of the porous filter plate and the bottom plate of the filter tray, and a pipe is provided at the bottom of the filter tray.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the filter cloth is supported by the filter tray and the porous filter plate, preventing it from deforming due to pressure during the filtration process. At the same time, a filtrate flow channel is formed below the porous filter plate, and the pipe at the bottom of the filtrate flow channel is connected to the vacuum device. Under the action of vacuum suction, the material is further dehydrated, thereby further improving the filtration quality.

[0015] Furthermore, it also includes a filter cloth cleaning device, which includes a rinsing box and a rinsing water pipe disposed in the rinsing box. The rinsing box is disposed below the filter cloth in the circulation section, and the upper part of the rinsing box is open. The rinsing water pipe is provided with multiple water vapor nozzles for rinsing the lower surface of the filter cloth in the circulation section.

[0016] The beneficial effect of adopting the above-mentioned further solution is that rinsing the lower surface of the filter cloth in the circulation section with water vapor nozzles can effectively remove the residues attached to the filter cloth, maintaining the cleanliness of the filter cloth and the filtration efficiency.

[0017] Furthermore, the filter cloth cleaning device also includes air nozzles, with multiple air nozzles arranged side by side above the circulating section filter cloth for blowing the upper surface of the circulating section filter cloth.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the purging action of the air nozzle can further remove residues on the surface of the filter cloth, especially tiny particles and fibers, ensuring the filtration effect and service life of the filter cloth.

[0019] Furthermore, it also includes a water receiving tray, which is disposed below the filter cloth in the circulation section.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the water receiving tray can collect the liquid and residue washed off the filter cloth, preventing it from splashing onto other parts of the equipment or the working area, thus maintaining a clean and safe working environment.

[0021] Furthermore, it also includes a scraper, the scraping end of which is close to the lower surface of the filter cloth in the circulation section.

[0022] The beneficial effect of adopting the above-mentioned further solution is that, during the operation of the filter cloth, the scraper can continuously scrape off the residue on the surface of the filter cloth, which helps to maintain the filtration efficiency of the filter cloth and extend its service life.

[0023] Furthermore, the idler roller assembly includes a drive roller, a driven roller, a guide roller, and a correction roller rotatably mounted on the frame, wherein the drive roller is connected to a drive motor.

[0024] The beneficial effects of adopting the above-mentioned further solution are that the setting of the idler roller group not only realizes the smooth transmission of the filter cloth, but also controls the running speed and position of the filter cloth through the connection between the drive roller and the drive motor. At the same time, the correction roller can also ensure that the filter cloth maintains the correct direction during transmission, preventing deviation or jamming.

[0025] Furthermore, a pressing roller is rotatably mounted on the frame, and the pressing roller is positioned above the filter cloth in the filter section.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the pressure roller can apply a certain pressure to the filter cloth in the filtration section, which helps to achieve close contact between the filter cloth and the slurry tray and improves the filtration effect.

[0027] Furthermore, the slurry tray includes a top support plate and a surrounding plate, the upper end of the surrounding plate being sealed and connected below the top support plate, and the lower end of the surrounding plate being provided with a sealing ring.

[0028] The beneficial effects of adopting the above-mentioned further solutions are that the top support plate can be made of a material with strong compressive strength to ensure the stability of the slurry plate under pressure, and the surrounding plate can be made of a material with good corrosion resistance, such as nylon, which can not only enhance the durability of the slurry plate, but also effectively resist the corrosive effect of the material on the surrounding plate and extend the service life of the equipment. A sealing ring is set under the surrounding plate to prevent the material from moving out from the gap between the surrounding plate and the filter cloth and affecting the filtration effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the pressurized step filter with a closed chamber according to the present invention;

[0031] Figure 2 This is a schematic diagram of the internal filter cloth installation structure of the pressurized step filter with a closed chamber according to this utility model.

[0032] Figure 3 For the present utility model Figure 2 Top view;

[0033] Figure 4 For the present utility model Figure 3 Sectional view along axis AA;

[0034] Figure 5 For the present utility model Figure 4 A schematic diagram of the enlarged structure of part B;

[0035] In the diagram, 100 is the pressing device; 200 is the slurry tray; 201 is the top support tray; 202 is the surrounding plate; 203 is the sealing ring; 301 is the filter cloth in the filter section; 302 is the filter cloth in the circulation section; 401 is the drive roller; 402 is the driven roller; 403 is the steering roller; 404 is the correction roller; 405 is the pressing roller; 500 is the drive motor; 600 is the filter tray; 601 is the porous filter plate; 700 is the filter cloth cleaning device; 701 is the rinsing box; 702 is the rinsing water pipe; 703 is the water vapor nozzle; 704 is the air nozzle; 800 is the water receiving tray; 900 is the frame; 901 is the scraper; and 902 is the discharge hopper. Detailed Implementation

[0036] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0037] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0038] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0039] like Figure 1 - Figure 5 As shown, the technical solution provided by this utility model is as follows: A pressurized step filter with a closed chamber includes a frame 900, and further includes: a pressing device 100, a slurry tray 200, a filter cloth, and a roller assembly installed on the frame 900; the filter cloth is arranged in the frame 900 through the roller assembly, and the filter cloth is divided into an upper filtration section filter cloth 301 and a lower circulation section filter cloth 302; the slurry tray 200 is arranged above the filtration section filter cloth 301, the slurry tray 200 has a slurry chamber, and the lower part of the slurry tray 200 is open; the output shaft of the pressing device 100 is connected to the slurry tray 200 to drive the slurry tray 200 closer to or further away from the filter cloth; the slurry tray 200 is also provided with a feed inlet and a compressed air inlet.

[0040] In addition, in this embodiment:

[0041] The roller assembly includes a drive roller 401, a driven roller 402, a guide roller 403, and a correction roller 404. The drive roller 401, driven roller 402, guide roller 403, and correction roller 404 are all rotatably mounted on the frame 900. The drive roller 401 is connected to the drive motor 500. The guide roller 403 can change the direction of movement of the filter cloth. The correction roller 404 can ensure that the filter cloth maintains the correct direction during transmission and prevents deviation or jamming.

[0042] A pressure roller 405 is also rotatably mounted on the frame 900, and the pressure roller 405 is positioned above the filter cloth 301 in the filtration section. The pressure roller 405 can apply a certain pressure to the filter cloth 301 in the filtration section, which helps to ensure close contact between the filter cloth and the slurry tray 200 and improves the filtration effect.

[0043] In this embodiment, the slurry tray 200 includes a top support tray 201 and a surrounding plate 202. The upper end of the surrounding plate 202 is sealed to the bottom of the top support tray 201, and the lower end of the surrounding plate 202 is provided with a sealing ring 203. The top support tray 201 can be made of a material with strong pressure resistance to ensure the stability of the slurry tray 200 under pressure. The surrounding plate 202 can be made of a material with good corrosion resistance, such as nylon, which not only enhances the durability of the slurry tray 200 but also effectively resists the corrosive effect of materials on the surrounding plate 202, extending the service life of the equipment. The sealing ring 203 is provided below the surrounding plate 202 to prevent materials from moving out from the gap between the surrounding plate 202 and the filter cloth, thus affecting the filtration effect.

[0044] Of course, although this embodiment describes a split design of the slurry tray 200 consisting of a top support tray 201 and a surrounding plate 202, it does not mean that this is the only option. In practical applications, the slurry tray 200 can also adopt an integrated structural design made of the same material. As long as such a design can meet the performance requirements of the slurry tray 200 in terms of pressure resistance, corrosion resistance, and prevention of material leakage, it should be considered within the protection scope of this utility model.

[0045] The filter also includes a filter tray 600 and a porous filter plate 601. The filter tray 600 is disposed below the filter cloth 301 of the filter section, and the porous filter plate 601 is disposed between the filter cloth 301 of the filter section and the filter tray 600. A flow channel is formed between the bottom of the porous filter plate 601 and the bottom plate of the filter tray 600, and a pipe is provided at the bottom of the filter tray 600.

[0046] The pipe at the bottom of the filter tray 600 connects to the filtrate tank, which is connected to a vacuum device. A three-way valve is installed between the filtrate tank and the vacuum device. The main function of the three-way valve is to release the vacuum and discharge the filtrate. During operation, the three-way valve is switched to connect the vacuum device to the filtrate tank. After the vacuum device is activated, the filtrate will continuously flow from the flow channel of the filter tray 600 into the filtrate tank. When the filtrate tank is close to full, the three-way valve is switched to connect the filtrate tank to the external environment, thereby releasing the negative pressure inside the tank. Subsequently, the filtrate will be discharged from the tank through the drain port on the filtrate tank. The vacuum suction can be used to further dewater the material in the slurry tray 200, further improving the filtration quality.

[0047] The filter also includes a filter cloth cleaning device 700, which includes a rinsing tank 701 and a rinsing water pipe 702 disposed within the rinsing tank 701. The rinsing tank 701 is located below the circulating section filter cloth 302, and its upper part is open. The rinsing water pipe 702 is equipped with multiple steam nozzles 703 for rinsing the lower surface of the circulating section filter cloth 302. Rinsing the lower surface of the circulating section filter cloth 302 with steam nozzles 703 effectively removes residues adhering to the filter cloth, maintaining its cleanliness and filtration efficiency.

[0048] The filter cloth cleaning device 700 also includes air nozzles 704. A support plate is fixed on the rinsing box 701 and spans above the circulating section filter cloth 302. The support plate is provided with a plurality of air nozzles 704. The air nozzles 704 are used to blow on the upper surface of the circulating section filter cloth 302, which can further remove residues on the upper surface of the filter cloth, especially small particles and fibers, to ensure the filtration effect and service life of the filter cloth.

[0049] The filter also includes a water collection tray 800, which is disposed below the filter cloth 302 in the circulation section. The water collection tray 800 can collect liquid and residue washed off the filter cloth, preventing it from splashing onto other parts of the equipment or the working area, thus maintaining a clean and safe working environment.

[0050] The frame 900 is also equipped with a discharge hopper 902, and the discharge hopper 902 is equipped with a scraper 901. The scraping end of the scraper 901 is close to the lower surface of the filter cloth 302 in the circulation section. During the operation of the filter cloth, the scraper 901 can continuously scrape away the residue on the surface of the filter cloth.

[0051] The embodiments of this utility model do not limit the structure of the clamping device 100, and the clamping device 100 can be an existing hydraulic cylinder, oil cylinder or air cylinder.

[0052] The working method of this utility model's pressurized step filter with a closed chamber is as follows:

[0053] First, the clamping device 100 is activated, which drives the slurry tray 200 close to the filter cloth. The clamping device 100 applies a downward pressure to the slurry tray 200, pressing the slurry tray 200 against the porous filter plate 601 below, thus forming a relatively closed chamber that can withstand internal pressure. This ensures that the material will not leak during the filtration process and meets the requirements for pressurized internal feeding.

[0054] Subsequently, the material to be filtered is pumped into the filter chamber through the feed inlet reserved on the slurry tray 200 using a feed pump. During this process, the material is subjected to initial feeding compression, and the water inside is gradually squeezed out, passing through the filter cloth and porous filter plate 601 in sequence, and finally flowing into the buffer tank through the pipe connected to the bottom of the filter tray 600.

[0055] As material is continuously added, the filtration chamber gradually fills with it, forming a uniform and dense filter cake layer. Compressed air is then injected into the filtration chamber through the compressed air inlet. Because a uniform filter cake layer has already been formed, the compressed air carries away any residual moisture inside the filter cake as it penetrates the layer, ultimately discharging it into the filtrate tank.

[0056] After the vacuum device is started, the residual moisture in the material will be further squeezed out under the action of vacuum suction, and discharged into the buffer tank through the filter cloth, porous filter plate 601 and pipeline.

[0057] Finally, after the material has completed dewatering, the clamping device 100 is restarted to lift the slurry tray 200, releasing the clamping force on the filter cloth. At this time, the drive roller 401 begins to rotate, moving the filter cloth and the material on it together. At the end of the filter cloth, the material is discharged through the discharge hopper 902. This completes one filtration process and prepares for the next filtration operation.

[0058] The filter of this invention features a slurry tray 200 positioned above the filter cloth. In actual operation, when a feed pump pumps material into the slurry tray 200 through its inlet, pressurized feeding is achieved. This not only performs the first stage of compression filtration, effectively removing some moisture and impurities, but also ensures a consistent filter cake thickness, guaranteeing the filtration effect of vacuum filtration. Compressed air is then pumped into the slurry tray 200 through its inlet. This compressed air permeates the formed filter cake layer, carrying away residual moisture from the filter cloth, effectively purging the material. This process further reduces the moisture content of the material, improving the filtration effect. Furthermore, when the vacuum device is activated, the vacuum suction further dehydrates the material, removing residual moisture and significantly improving filtration quality, ensuring the dryness and purity of the final product. Therefore, the filter of this utility model integrates multiple functions such as pressurized feeding, compressed air purging and vacuum dehydration, and realizes pressurized step-by-step extrusion filtration of materials, thereby improving filtration efficiency and quality.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressurized step filter with a closed chamber, comprising a frame (900), characterized in that, Also includes: A clamping device (100), a slurry tray (200), a filter cloth, and a roller assembly are mounted on the frame (900); The filter cloth is set inside the frame (900) by the roller group, and the filter cloth is divided into an upper filtration section filter cloth (301) and a lower circulation section filter cloth (302). The slurry tray (200) is disposed above the filter cloth (301) of the filter section. The slurry tray (200) has a slurry chamber inside and the lower part of the slurry tray (200) is open. The output shaft of the pressing device (100) is connected to the slurry tray (200) to drive the slurry tray (200) to move closer to or away from the filter cloth. The slurry tray (200) is also provided with a feed inlet.

2. The pressurized step filter with a closed chamber according to claim 1, characterized in that, The slurry pan (200) is also provided with a compressed air inlet.

3. The pressurized step filter with a closed chamber according to claim 1, characterized in that, The slurry tray (200) includes a top support tray (201) and a surrounding plate (202). The upper end of the surrounding plate (202) is sealed and connected to the bottom of the top support tray (201), and the lower end of the surrounding plate (202) is provided with a sealing ring (203).

4. The pressurized step filter with a closed chamber according to claim 1, characterized in that, It also includes a filter tray (600) and a porous filter plate (601). The filter tray (600) is disposed below the filter cloth (301) of the filter section. The porous filter plate (601) is disposed between the filter cloth (301) of the filter section and the filter tray (600). A flow channel is formed between the bottom of the porous filter plate (601) and the bottom plate of the filter tray (600). The bottom of the filter tray (600) is provided with a pipe.

5. The pressurized step filter with a closed chamber according to any one of claims 1-4, characterized in that, It also includes a filter cloth cleaning device (700), which includes a rinsing box (701) and a rinsing water pipe (702) disposed in the rinsing box (701). The rinsing box (701) is disposed below the circulating section filter cloth (302), and the upper part of the rinsing box (701) is open. The rinsing water pipe (702) is provided with a plurality of water vapor nozzles (703) for rinsing the lower surface of the circulating section filter cloth (302).

6. The pressurized step filter with a closed chamber according to claim 5, characterized in that, The filter cloth cleaning device (700) also includes air nozzles (704), and multiple air nozzles (704) are arranged side by side above the circulating section filter cloth (302) for blowing the upper surface of the circulating section filter cloth (302).

7. The pressurized step filter with a closed chamber according to claim 5, characterized in that, It also includes a water receiving tray (800) disposed below the filter cloth (302) in the circulation section.

8. The pressurized step filter with a closed chamber according to claim 1, characterized in that, The frame (900) is also provided with a scraper (901), and the scraping end of the scraper (901) is close to the lower surface of the filter cloth (302) in the circulation section.

9. The pressurized step filter with a closed chamber according to claim 1, characterized in that, The roller assembly includes a drive roller (401), a driven roller (402), a guide roller (403), and a correction roller (404) rotatably mounted on the frame (900). The drive roller (401) is connected to a drive motor (500) for transmission.

10. The pressurized step filter with a closed chamber according to claim 9, characterized in that, The frame (900) is also rotatably equipped with a pressing roller (405), which is positioned above the filter cloth (301) of the filter section.

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