A plate and frame filter press with integrated sealing discharge and precision filtration

Abstract

This utility model provides a sealed discharge and precision filtration integrated plate and frame filter press, belonging to the field of solid-liquid separation technology. It includes a sleeve with one open end, with the plate and frame filter press vertically placed inside the sleeve. The drive unit of the plate and frame filter press is located at the end of the sleeve away from the open end. The feed inlet of the plate and frame filter press is located at the open end of the sleeve and connected to the feed pipe. A double-layer space is provided in the side wall of the sleeve. The liquid outlet of the plate and frame filter press is connected to the double-layer space through a pipe. A discharge pipe is also connected to the sleeve, with one end connected to the double-layer space inside the sleeve for discharging and guiding the filtered liquid. This utility model can filter liquid in a sealed manner, preventing contamination from dust or impurities in the working environment during processing, thus ensuring that product quality is not affected.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation equipment technology, specifically to a plate and frame filter press with sealed discharge and precision filtration integrated machine. Background Technology

[0002] In existing magnesium sulfate production processes, plate and frame filter presses are commonly used to separate magnesium sulfate solutions and slurries. Specifically, the process involves dissolving lightly calcined magnesium oxide in water to form a slurry, then adding sulfuric acid to generate a magnesium sulfate slurry, which is subsequently separated into solid and liquid components using a plate and frame filter press. During this process, the magnesium sulfate slurry is pressed into the plates and frames, the slurry is retained within the plates and frames, while the separated magnesium sulfate solution flows through taps on the plates and frames into a lower trough.

[0003] However, the existing plate and frame filter press discharge method has obvious drawbacks. Because the magnesium sulfate solution is directly exposed to the air during the discharge process, it is not only easy for foreign objects on the ground to be brought into the solution when people walk around, but it may also attract impurities such as mosquitoes, thus affecting the purity of the magnesium sulfate solution.

[0004] In addition, existing filtration systems mainly rely on filter cloth for preliminary filtration, but filter cloth may not be able to completely intercept all particulate impurities in the solution, resulting in the final product containing invisible particles and affecting product quality. Utility Model Content

[0005] In view of this, the present invention provides a plate and frame filter press with sealed discharge and precision filtration integrated machine. The present invention can filter liquid materials in a sealed manner, so that the liquid materials will not be contaminated by dust or impurities in the working environment during the processing, thereby ensuring that the quality of the product will not be affected.

[0006] To solve the above-mentioned technical problems, this utility model provides a plate and frame filter press with sealed discharge and precision filtration integrated machine, including a sleeve with an open end, the sleeve being open at the top and sealed at the bottom. The plate and frame filter press is placed vertically inside the sleeve, and the drive component of the plate and frame filter press is located at the end of the sleeve away from the open end. The feed port of the plate and frame filter press is located at the open end of the sleeve and is connected to the feed pipe. The liquid can enter the plate and frame filter press for filtration through the feed pipe. An interlayer space is provided in the side wall of the sleeve. The liquid outlet of the plate and frame filter press is connected to the interlayer space through a pipe. A discharge pipe is also connected to the sleeve. One end of the discharge pipe is connected to the interlayer space in the sleeve for discharging and guiding the filtered liquid.

[0007] A return pipe is connected between the feed pipe and the discharge pipe. The two ends of the return pipe are connected to the feed pipe and the discharge pipe, respectively. A first control valve is installed on the return pipe, and a second control valve is installed on the feed pipe. The second control valve is located on the side of the feed pipe away from the plate and frame filter press where it connects to the return pipe. A third control valve is installed on the discharge pipe, located on the side of the discharge pipe away from the plate and frame filter press where it connects to the return pipe. The first, second, and third control valves can all control or block the flow of liquid in the pipeline.

[0008] The return pipe is equipped with two first control valves, which are located at both ends of the return pipe. The first control valves can prevent liquid from flowing into the return pipe in a non-circulating state.

[0009] A pressure tank is also installed on the feed pipe, and a fourth control valve is also installed on the first pipe corresponding to the pressure tank. The fourth control valve is located between the pressure tank and the plate and frame filter press. The pressure tank can provide sufficient power during the initial feeding.

[0010] A pressure gauge is also installed on the feed pipe, which is located between the fourth control valve and the pressure tank.

[0011] A pressure valve is also installed on the feed pipe, which is located on the side of the pressure tank away from the plate and frame filter press.

[0012] A precision filter is also installed on the discharge pipe. The precision filter is located on the side of the third control valve on the discharge pipe away from the plate and frame filter press. The discharge port of the precision filter is connected to the next process through a pipeline. The liquid material filtered by the plate and frame filter press can be filtered again through the precision filter.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0014] 1. Seal the discharge port to prevent contamination: The integrated machine adopts a sleeve-sealed structure, placing the plate and frame filter press inside the sleeve. The liquid outlet is connected to the sleeve's interlayer space through a pipe, completely avoiding the problem of direct exposure of the solution to air in traditional liquid discharge methods. This effectively blocks the entry of impurities such as personnel movement, ground debris, and insects into the solution, significantly improving the hygiene quality and purity of the product.

[0015] 2. Precision filtration enhances quality: A precision filter is added to the discharge pipe to perform secondary precision filtration on the liquid material after the initial filtration by the plate and frame filter press. This intercepts particulate impurities in the solution that were not filtered by the filter cloth. This ensures that the final product is free of visible or invisible particles, meeting the production requirements of high-quality magnesium sulfate solution.

[0016] 3. Reflux rinsing to optimize the process: By setting up a reflux pipe and first, second, and third control valves, the function of reflux rinsing of the primary filtrate is realized. In the initial stage of pressure filtration, the primary filtrate can be returned to the pressure tank for secondary filtration, which not only reduces resource waste but also further improves the filtration effect through circulation rinsing, thus optimizing the overall process flow.

[0017] 4. Pressure control, stable and efficient: The pressure tank, pressure gauge, and pressurizing valve on the feed pipe can precisely control the feed pressure of the plate and frame filter press. The pressure tank provides the initial feeding power, the pressure gauge monitors pressure changes in real time, and the pressurizing valve adjusts the pressure as needed, ensuring the stability and efficiency of the filtration process.

[0018] 5. Compact structure and easy operation: The integrated machine combines a plate and frame filter press, sealing sleeve, precision filter, and control valves into one compact and easy-to-operate unit. The rational layout of each component facilitates installation, maintenance, and repair, reducing production costs and labor intensity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a plate and frame filter press with sealed discharge and precision filtration integrated machine according to the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Sleeve; 2. Plate and frame filter press; 3. Feed pipe; 4. Interlayer space; 5. Discharge pipe; 6. Return pipe; 7. First control valve; 8. Second control valve; 9. Third control valve; 10. Pressure tank; 11. Pressure gauge; 12. Pressurizing valve; 13. Fourth control valve; 14. Precision filter. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the appendices of the embodiments of this utility model. Figure 1 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0022] This embodiment provides a plate and frame filter press 2 with sealed discharge and precision filtration integrated machine, including a sleeve 1 with one end open and the other end sealed. The sealed end is placed on the ground, and the open end is arranged vertically upwards. The plate and frame filter press 2 is fixedly placed inside the sleeve 1. The top of the plate and frame filter press 2 and the top of the sleeve 1 are on the same horizontal plane. The drive component of the plate and frame filter press 2 is located at the end away from the open end of the sleeve 1. A feed pipe 3 is also provided. One end of the feed pipe 3 is connected to an external feeding mechanism, and the other end of the feed pipe 3 is connected to the feed port at the top of the plate and frame filter press 2. The feed pipe 3 can transport the liquid material into the plate and frame filter press 2, so that the liquid material can be filtered. Correspondingly, the plate and frame filter press 2 also has an interlayer space 4 in the wall of the sleeve 1. The outlet of the plate and frame filter press 2 is connected to the interlayer space 4 of the sleeve 1 through a pipe. In this way, the filtered liquid material can enter the interlayer space 4 in the sleeve 1. Correspondingly, the sleeve 1 is also provided with a discharge pipe 5. One end of the discharge pipe 5 is connected to the next process, and the other end of the discharge pipe 5 is connected to the interlayer space 4 of the sleeve 1. In this way, the liquid material in the interlayer space 4 can flow to the next process through the discharge pipe 5, thereby achieving sealed discharge.

[0023] It is worth mentioning that a return pipe 6 is also connected between the feed pipe and the discharge pipe 5. The two ends of the return pipe 6 are connected to the feed pipe 3 and the discharge pipe 5 respectively through a three-way pipe. The return pipe 6 is also equipped with a first control valve 7. The first control valve 7 is used to control the flow or blockage of liquid in the return pipe 6, so that the liquid will not enter the return pipe 6 when the plate and frame filter press 2 continuously filters the liquid.

[0024] Furthermore, a second control valve 8 is also provided on the feed pipe 3, corresponding to the return pipe 6. A third control valve 9 is also provided on the discharge pipe 5. The third control valve 9 is located on the side of the discharge pipe 5 away from the plate and frame filter press 2 at the connection between the discharge pipe 5 and the return pipe 6. That is, when the liquid initially enters the plate and frame filter press 2, the first control valve 7 can be opened and the second control valve 8 and the third control valve 9 can be closed. Thus, the liquid after filtration by the plate and frame filter press 2 can enter the discharge pipe 5. Since the third control valve 9 blocks the discharge pipe 5, the liquid in the discharge pipe 5 can enter the return pipe 6. Then the liquid in the return pipe 6 will flow into the feed pipe 3. Since the second control valve 8 blocks the feed pipe 3, the liquid in the feed pipe 3 will flow back into the plate and frame filter press 2 for filtration again.

[0025] Preferably, the feed pipe 3 is also equipped with a pressure valve 12. The pressure valve 12 is located on the side of the plate and frame filter press 2 near the connection between the feed pipe 3 and the return pipe 6. That is, the pressure valve 12 can be used to pressurize the liquid material flow when the liquid material is lost, so that the pressure remains normal when the liquid sulfur is circulating through the filter plate.

[0026] Preferably, there are two first control valves 7 on the return pipe 6, and the two first control valves 7 are located at both ends of the return pipe 6, so that when the feed pipe 3 is continuously fed for filtration, closing the two first control valves 7 can prevent liquid from flowing into the end of the return pipe 6.

[0027] Furthermore, a pressure tank 10 is also provided on the feed pipe 3. The pressure tank 10 is located between the pressure valve 12 and the plate and frame filter press 2. Correspondingly, a fourth control valve 13 is also provided on the feed pipe 3. The fourth control valve 13 is used to control the flow or blockage of liquid in the feed pipe 3. That is, during the initial filtration of liquid, the second control valve 8 should be closed and the first control valve 7 and the fourth control valve 13 should be closed. As a result, the liquid will move into the pressure tank 10 and be continuously pressurized in the pressure tank 10. After the pressure reaches the specified value, the fourth control valve 13 is opened, and the liquid will enter the plate and frame filter press 2. That is, sufficient pressure can be provided for the liquid during the initial filtration of liquid.

[0028] Correspondingly, a pressure gauge 11 is also provided on the feed pipe 3. The pressure gauge 11 is located between the fourth control valve 13 and the pressure tank 10, that is, the pressure inside the pressure tank 10 can be detected in real time through the pressure gauge 11.

[0029] Preferably, a precision filter 14 is also provided on the discharge pipe 5. The precision filter 14 is located on the side of the third control valve 9 on the discharge pipe 5 away from the plate and frame filter press 2. The discharge port of the precision filter 14 is connected to the downstream process through a pipe. That is, the plate and frame filter press 2 mainly relies on the filter screen to filter the liquid. After filtration by the filter screen, some impurities will still exist in the liquid. After filtration again by the precision filter 14, the quality of the liquid can be further improved.

[0030] Working principle: Connect the feed pipe 3 to the external feeding equipment. When filtering the liquid, first close the first control valve 7 and the fourth control valve 13. The feeding equipment can then transport the liquid into the feed pipe 3, which in turn will be transported into the pressure tank 10 and continuously pressurized. Once the pressure reaches the specified value, close the second control valve 8 and the third control valve 9, and open the first control valve 7 and the fourth control valve 13. The liquid in the pressure tank 10 will then enter the plate and frame filter press 2 for filtration. The liquid filtered by the plate and frame filter press 2 will then enter the sleeve 1. Within the interlayer space 4, the liquid material can enter the discharge pipe 5. Since the third control valve 9 on the discharge pipe 5 is in a blocked state, the liquid material in the discharge pipe 5 will flow back into the feed pipe 3 through the return pipe 6, thereby circulating and filtering the initially filtered liquid material. After circulating for a specified time, the first control valve 7 is closed, and the second control valve 8, the third control valve 9, and the fourth control valve 13 are opened, so that the liquid material in the discharge pipe 5 will enter the precision filter 14 for secondary filtration. The liquid material after secondary filtration will flow to the next process.

[0031] The feed pipe 3 is also equipped with a pressure valve 12, which is located on the side of the pressure tank 10 away from the plate and frame filter press 2. A precision filter 14 is also provided on the discharge pipe 5. The precision filter 14 is located on the side of the third control valve 9 on the discharge pipe 5 away from the plate and frame filter press 2. The discharge port of the precision filter 14 is connected to the downstream process through a pipe.

[0032] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A plate and frame filter press with integrated sealing discharge and precision filtration, characterized in that: The filter press includes a sleeve (1) with one end open, a plate and frame filter press (2) placed vertically inside the sleeve (1), and the drive unit of the plate and frame filter press (2) is located inside the sleeve (1) away from the open end. The feed port of the plate and frame filter press (2) is located at the open end of the sleeve (1) and is connected to the feed pipe (3). The sleeve (1) has an interlayer space (4) in its side wall. The liquid outlet of the plate and frame filter press (2) is connected to the interlayer space (4) through a pipe. The sleeve (1) is also connected to a discharge pipe (5). One end of the discharge pipe (5) is connected to the interlayer space (4) inside the sleeve (1) for discharging and guiding the filtered liquid.

2. The integrated plate and frame filter press (2) with sealed discharge and precision filtration as described in claim 1, characterized in that: A return pipe (6) is also connected between the feed pipe (3) and the discharge pipe (5). The two ends of the return pipe (6) are connected to the feed pipe (3) and the discharge pipe (5) respectively. A first control valve (7) is provided on the return pipe (6), and a second control valve (8) is provided on the feed pipe (3). The second control valve (8) is located on the side away from the plate and frame filter press (2) at the connection between the feed pipe (3) and the return pipe (6). A third control valve (9) is also provided on the discharge pipe (5). The third control valve (9) is located on the side away from the plate and frame filter press (2) at the connection between the discharge pipe (5) and the return pipe (6). The first control valve (7), the second control valve (8), and the third control valve (9) can all control the flow of liquid in the pipe or block it.

3. The integrated plate and frame filter press (2) with sealed discharge and precision filtration as described in claim 2, characterized in that: The return pipe (6) is equipped with two first control valves (7), which are located at both ends of the return pipe (6).

4. A plate and frame filter press (2) with sealed discharge and precision filtration integrated machine as described in any one of claims 1-3, characterized in that: The feed pipe (3) is also equipped with a pressure tank (10), and a fourth control valve (13) is also provided on the first pipe corresponding to the pressure tank (10). The fourth control valve (13) is located between the pressure tank (10) and the plate and frame filter press (2).

5. The integrated plate and frame filter press (2) with sealed discharge and precision filtration as described in claim 4, characterized in that: The feed pipe (3) is also equipped with a pressure gauge (11), which is located between the fourth control valve (13) and the pressure tank (10).

6. The integrated plate and frame filter press (2) with sealed discharge and precision filtration as described in claim 5, characterized in that: The feed pipe (3) is also equipped with a pressure valve (12), which is located on the side of the pressure pack (10) away from the plate and frame filter press (2).

7. A plate and frame filter press (2) with sealed discharge and precision filtration integrated as described in any one of claims 1-3, characterized in that: The discharge pipe (5) is also equipped with a precision filter (14). The precision filter (14) is located on the side of the third control valve (9) on the discharge pipe (5) away from the plate and frame filter press (2). The outlet of the precision filter (14) is connected to the next process through a pipe.

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