A device for radically eliminating the running of filtrate from a flat disc system

Abstract

The utility model aims at providing a device of root cause flat disc system run filtrate, including flat disc filter, mother liquor vacuum liquid receiving tank, weak filtrate vacuum liquid receiving tank, strong filtrate vacuum liquid receiving tank, gas-liquid separator, liquid seal box, its characterized in that: the liquid seal box is the box of top opening, the flat disc filter bottom is connected mother liquor vacuum liquid receiving tank, weak filtrate vacuum liquid receiving tank, strong filtrate vacuum liquid receiving tank through mother liquor filtrate pipe, weak filtrate pipe, strong filtrate pipe respectively, based on potential energy will corresponding filtrate send into corresponding vacuum liquid receiving tank, the mother liquor vacuum liquid receiving tank, weak filtrate vacuum liquid receiving tank, strong filtrate vacuum liquid receiving tank top is equipped with gas outlet branch pipe respectively, each gas outlet branch pipe is connected gas pipe respectively, the gas pipe is connected with the import of gas-liquid separator.The device overcomes the defects of prior art, can realize real-time monitoring flat disc system oil dirt run filtrate phenomenon, realizes the function of root cause flat disc run filtrate pollution circulating water.

Description

Technical Field

[0001] This utility model relates to the chemical industry and the metallurgical industry, and in particular to a device for completely eliminating the leakage of filtrate in a flat plate system. Background Technology

[0002] The flat disc filter is a high-performance solid-liquid separation device characterized by high efficiency, automation, energy saving, and strong adaptability. It works by pumping aluminum hydroxide slurry onto the disc surface, where the filtrate is vacuum-absorbed through the filter cloth, while the solids remain on the cloth, achieving solid-liquid separation. The flat disc filter has high filtration efficiency and can effectively remove solid particles from liquids, making it suitable for separating high-concentration, fine-particle materials.

[0003] Currently, flat-plate filters are widely used in the solid-liquid separation and washing of aluminum hydroxide slurry in the alumina production process. However, flat-plate filters have certain shortcomings in alumina production. The filtrate vacuum receiving tank and the cone and downcomer of the gas-liquid separator frequently become clogged. After clogging, the filtrate in the gas-liquid separator cannot fall normally into the filtrate clarification tank and instead enters the circulating water system with the vacuum system. This phenomenon is called filtrate runoff in the flat-plate system. Because the entire filtrate runoff process in the flat-plate system is carried out in a closed system, alkaline contamination of the circulating water is only detected when the alkalinity exceeds the standard. Further investigation and treatment take time, leading to severe alkaline contamination of the circulating water. This necessitates replacement with fresh water, which can only be returned to the process, increasing the steam cost of the evaporation process and requiring a large amount of additional evaporation condensate. Utility Model Content

[0004] In view of the technical problems existing in the background art, the present invention aims to provide a device for completely eliminating filtrate leakage in a flat-plate system. This device overcomes the defects of the prior art, promptly detects blockages in the vacuum receiving tank, and ensures that the filtrate is returned to the production process through the device when the vacuum receiving tank is blocked, preventing it from entering the vacuum pump through the vacuum pipeline and contaminating the circulating water system. This eliminates the factors that cause filtrate leakage from the flat-plate system to affect the circulating water at the source, improving equipment efficiency. Furthermore, by promptly and quickly detecting blockages in the vacuum receiving tank, it also prevents the blockage from extending further to the gas-liquid separator.

[0005] To solve the above problems, the technical solution of this utility model is as follows: A device for completely eliminating filtrate leakage in a flat-pan filter system, comprising a flat-pan filter, a mother liquor vacuum receiving tank, a weak filtrate vacuum receiving tank, a strong filtrate vacuum receiving tank, a gas-liquid separator, and a liquid seal box, characterized in that: the liquid seal box is a box with an open top; the bottom of the flat-pan filter is connected to the mother liquor vacuum receiving tank, the weak filtrate vacuum receiving tank, and the strong filtrate vacuum receiving tank respectively through a mother liquor filtrate pipe, a weak filtrate pipe, and a strong filtrate pipe, based on potential energy to... The filtrate should be sent into the corresponding vacuum receiving tank; the top of the mother liquor vacuum receiving tank, the weak filtrate vacuum receiving tank, and the strong filtrate vacuum receiving tank are respectively provided with gas outlet branch pipes, and each gas outlet branch pipe is connected to a gas supply pipe, which is connected to the inlet of the gas-liquid separator; the top of the gas-liquid separator is connected to the vacuum system through the gas outlet pipe, and the bottom of the gas-liquid separator is provided with a liquid outlet pipe A, the outlet of the lower end of the liquid outlet pipe A extends from the top opening into the liquid surface inside the liquid seal box; the upper part of the side wall of the liquid seal box is provided with an overflow pipe.

[0006] The lower outlet of the overflow pipe extends above the sewage tank.

[0007] The liquid seal tank is equipped with a water supply pipe at the top, which is connected to a water source via a water pump, and a water valve is installed on the water supply pipe.

[0008] The vacuum system includes a vacuum pump and a circulating water tank, with the inlet and outlet pipes of the vacuum pump connected.

[0009] A camera is installed next to the liquid seal tank to observe the drainage situation at the lower outlet of the overflow pipe and the changes at the top of the liquid seal tank.

[0010] The lower ends of the mother liquor vacuum receiving tank, the weak filtrate vacuum receiving tank, and the strong filtrate vacuum receiving tank are respectively connected to the top of the mother liquor clarification tank, the weak filtrate clarification tank, and the strong filtrate clarification tank through the outlet pipe B, so that the filtrate is sent into the corresponding clarification tank based on potential energy.

[0011] The lower ends of the mother liquor clarification tank, the weak filtrate clarification tank, and the strong filtrate clarification tank are each equipped with a liquid outlet pipe C. The lower outlet of each liquid outlet pipe C extends to the top of the sewage tank. Each liquid outlet pipe C is equipped with a valve. When needed, the alkaline solution in the clarification tank is discharged into the sewage tank by potential energy.

[0012] The mother liquor filtrate pipe, the weak filtrate pipe, and the strong filtrate pipe are respectively connected to the upper middle part of the side wall of the mother liquor vacuum receiving tank, the weak filtrate vacuum receiving tank, and the strong filtrate vacuum receiving tank.

[0013] One end of the gas supply pipe is closed, and the other end is connected to the upper part of the side wall of the gas-liquid separator. The gas outlet branch pipe is connected to the gas supply pipe.

[0014] The beneficial effects of this utility model are as follows:

[0015] The device for eliminating alkali leakage in the flat plate system of this invention can realize real-time monitoring of oil and filtrate leakage in the flat plate system, thus solving the problem of frequent filtrate leakage affecting the quality of circulating water.

[0016] This invention features an open-type liquid seal tank that can quickly identify filtrate runoff from the flat-panel system. This avoids the risk of filtrate entering the gas-liquid separator, then the vacuum system, and finally the circulating water system due to blockage of the vacuum receiving tank, thus preventing the circulating water from being contaminated by alkaline solutions. It eliminates the pollution of circulating water by filtrate runoff from the flat-panel system at the source. Furthermore, by promptly detecting blockages in the vacuum receiving tank, it also prevents the blockage from extending further to the gas-liquid separator and from causing equipment failure due to alkaline buildup in the pump chambers of the vacuum pump and compressor that use circulating water. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] The names and numbers of the parts in the diagram are as follows:

[0019] 1 is a flat plate filter, 2 is a mother liquor vacuum receiving tank, 3 is a gas-liquid separator, 4 is a weak filtrate vacuum receiving tank, 5 is a strong filtrate vacuum receiving tank, 6 is a liquid seal tank, 7 is an overflow pipe, 8 is a water supply pipe, 9 is a water valve, 10 is a sewage tank, 11 is a vacuum system, 12 is a vacuum pump, 13 is a circulating water tank, 14 is a mother liquor filtrate pipe, 15 is a weak filtrate pipe, 16 is a strong filtrate pipe, 17 is an air outlet branch pipe, 18 is an air supply pipe, 19 is an air outlet pipe, 20 is a liquid outlet pipe A, 21 is a liquid outlet pipe B, 22 is a mother liquor clarification tank, 23 is a weak filtrate clarification tank, 24 is a strong filtrate clarification tank, 25 is a liquid outlet pipe C, and 26 is a valve. Detailed Implementation

[0020] The following description, in conjunction with the accompanying drawings, details the implementation methods and embodiments of this utility model and their working processes.

[0021] Referring to the accompanying drawings, an apparatus for eliminating filtrate leakage in a flat-panel filter system according to this embodiment includes a flat-panel filter 1, a mother liquor vacuum receiving tank 2, a weak filtrate vacuum receiving tank 4, a strong filtrate vacuum receiving tank 5, a gas-liquid separator 3, and a liquid-sealed tank 6. The liquid-sealed tank 6 is characterized by having a top-opening design. The bottom of the flat-panel filter 1 is connected to the mother liquor vacuum receiving tank 2, the weak filtrate vacuum receiving tank 4, and the strong filtrate vacuum receiving tank 5 respectively via a mother liquor filtrate pipe 14, a weak filtrate pipe 15, and a strong filtrate pipe 16, respectively, allowing the corresponding filtrate to be delivered into the appropriate tank based on potential energy. In the vacuum receiving tank; the top of the mother liquor vacuum receiving tank 2, the weak filtrate vacuum receiving tank 4, and the strong filtrate vacuum receiving tank 5 are respectively provided with gas outlet branch pipes 17, and each gas outlet branch pipe 17 is connected to a gas supply pipe 18. The gas supply pipe 18 is connected to the inlet of the gas-liquid separator 3; the top of the gas-liquid separator 3 is connected to the vacuum system 11 through a gas outlet pipe 19, and the bottom of the gas-liquid separator 3 is provided with a liquid outlet pipe A20. The outlet at the lower end of the liquid outlet pipe A20 extends from the top opening into the liquid surface of the liquid seal box 6; the upper part of the side wall of the liquid seal box 6 is provided with an overflow pipe 7.

[0022] The lower outlet of the overflow pipe 7 extends above the sewage tank 10.

[0023] The liquid seal tank 6 is equipped with a water supply pipe 8 at the top, which is connected to a water source via a water pump. A water valve 9 is installed on the water supply pipe 8. Each time the pan is stopped for maintenance, the liquid seal tank 6 needs to be emptied, and water is added through the water supply pipe 8 to rinse away any accumulated material inside. The tank is then filled with water again before feeding material into the pan.

[0024] The vacuum system 11 includes a vacuum pump 12 and a circulating water tank 13. The inlet of the vacuum pump 12 is connected to the outlet pipe 19. The vacuum system 11 is used to extract the gas separated by the gas-liquid separator and discharge it into the atmosphere. The circulating water tank 13 provides a power source for the vacuum pump 12.

[0025] A camera is installed next to the liquid seal box 6 to observe the drainage situation at the lower outlet of the overflow pipe 7 and the changes at the top of the liquid seal box 6.

[0026] The lower ends of the mother liquor vacuum receiving tank 2, the weak filtrate vacuum receiving tank 4, and the strong filtrate vacuum receiving tank 5 are respectively connected to the top of the mother liquor clarification tank 22, the weak filtrate clarification tank 23, and the strong filtrate clarification tank 24 through the outlet pipe B21, so that the filtrate is sent into the corresponding clarification tank based on potential energy.

[0027] The lower ends of the mother liquor clarification tank 22, the weak filtrate clarification tank 23, and the strong filtrate clarification tank 24 are each equipped with an outlet pipe C25. The lower outlet of each outlet pipe C25 extends above the wastewater tank 10. Each outlet pipe C25 is equipped with a valve 26. When needed, the alkaline solution in the clarification tank is discharged into the wastewater tank 10 using potential energy. The valve 26 is used to control the time when the filtrate is discharged into the wastewater tank 10.

[0028] The mother liquor filtrate pipe 14, the weak filtrate pipe 15, and the strong filtrate pipe 16 are respectively connected to the upper middle part of the side wall of the mother liquor vacuum receiving tank 2, the weak filtrate vacuum receiving tank 4, and the strong filtrate vacuum receiving tank 5.

[0029] One end of the air supply pipe 18 is closed, and the other end is connected to the upper middle part of the side wall of the gas-liquid separator 3. The air outlet branch pipe 17 is connected to the air supply pipe 18.

[0030] The working process of this embodiment is as follows:

[0031] The filtrate first enters the flat plate filter 1. The slurry filtered by the flat plate filter 1 undergoes liquid-solid separation under vacuum. The filtrate that hasn't been washed is the mother liquor, the filtrate that has been washed with washing water is the weak filtrate, and the filtrate that has undergone a first weak filtrate wash is the strong filtrate. The weak filtrate enters the weak filtrate clarification tank 23 and is pumped back to the flat plate filter as washing liquid again. Therefore, the filtrate is divided into three types. These three types of filtrate enter the mother liquor vacuum receiving tank 2, the weak filtrate vacuum receiving tank 4, and the strong filtrate vacuum receiving tank 5 respectively from the flat plate filter 1 through different filtrate pipes for gas-liquid separation. After vacuum... The gases obtained from the initial gas-liquid separation in the vacuum receiving tank enter the gas supply pipe 18 through the gas outlet branch pipe 17 above their respective vacuum receiving tanks, and are then sent to the gas-liquid separator 3 for further gas-liquid separation. The liquids are discharged downwards to the corresponding mother liquor clarification tank 22, weak filtrate clarification tank 23, and strong filtrate clarification tank 24, respectively. Finally, each filtrate is discharged into the wastewater tank 10 through the liquid outlet pipe C. The gas separated by the gas-liquid separator is extracted by a vacuum pump and discharged into the atmosphere, while the remaining liquid is discharged into the liquid seal tank 6 through the liquid outlet pipe A20, and finally into the wastewater tank 10 through the overflow pipe 7. Under normal conditions, no white bubbles will appear at the upper opening of the liquid seal tank 6, and the amount of liquid flowing out of the overflow pipe 7 is extremely small.

[0032] If any conical part of the vacuum receiving tank or the outlet pipe B that discharges the liquid to each clarification tank becomes blocked, the liquid cannot be discharged into the clarification tank normally and will overflow upwards, entering the gas-liquid separator 3 along with the gas. The liquid entering the gas-liquid separator 3 will be discharged into the liquid seal tank 6 through the outlet pipe A20, while the gas will be extracted by the vacuum pump and discharged into the atmosphere. When the filtrate is discharged into the liquid seal tank 6, white bubbles can be clearly seen overflowing from the upper opening of the liquid seal tank 6. At the same time, a large amount of liquid can be observed flowing into the sewage tank 10 through the overflow pipe 7. This indicates that a blockage has occurred. If necessary, manual intervention is required to clear the blockage to prevent it from extending further to the gas-liquid separator 3 and causing pollution of the circulating water tank.

Claims

1. An apparatus for eliminating filtrate leakage in a flat-plate filter system, comprising a flat-plate filter (1), a mother liquor vacuum receiving tank (2), a weak filtrate vacuum receiving tank (4), a strong filtrate vacuum receiving tank (5), a gas-liquid separator (3), and a liquid seal tank (6), characterized in that: The liquid-sealed box (6) is a box with an open top; The bottom of the flat plate filter (1) is connected to the mother liquor vacuum receiving tank (2), the weak filtrate vacuum receiving tank (4), and the strong filtrate vacuum receiving tank (5) respectively through the mother liquor filtrate pipe (14), the weak filtrate pipe (15), and the strong filtrate pipe (16), respectively, so that the corresponding filtrate is sent into the corresponding vacuum receiving tank based on potential energy; the top of the mother liquor vacuum receiving tank (2), the weak filtrate vacuum receiving tank (4), and the strong filtrate vacuum receiving tank (5) are respectively provided with air outlet branch pipes (17), each The gas outlet branch pipe (17) is connected to the gas supply pipe (18), and the gas supply pipe (18) is connected to the inlet of the gas-liquid separator (3); the top of the gas-liquid separator (3) is connected to the vacuum system (11) through the gas outlet pipe (19), and the bottom of the gas-liquid separator (3) is provided with a liquid outlet pipe A (20), and the outlet at the lower end of the liquid outlet pipe A (20) extends from the top opening into the liquid level in the liquid seal box (6); the upper part of the side wall of the liquid seal box (6) is provided with an overflow pipe (7).

2. The apparatus for treating the filtrate runoff of the rotary disc system according to claim 1, characterized in that: The lower outlet of the overflow pipe (7) extends above the sewage tank (10).

3. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: The liquid seal box (6) is equipped with a water supply pipe (8) at the top. The water supply pipe (8) is connected to a water source via a water pump. A water valve (9) is installed on the water supply pipe (8).

4. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: The vacuum system (11) includes a vacuum pump (12) and a circulating water tank (13). The inlet of the vacuum pump (12) is connected to the outlet pipe (19).

5. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: A camera is installed next to the liquid seal box (6) to observe the drainage situation at the lower outlet of the overflow pipe (7) and the changes at the top of the liquid seal box (6).

6. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: The lower ends of the mother liquor vacuum receiving tank (2), the weak filtrate vacuum receiving tank (4), and the strong filtrate vacuum receiving tank (5) are respectively connected to the top of the mother liquor clarification tank (22), the weak filtrate clarification tank (23), and the strong filtrate clarification tank (24) through the outlet pipe B (21), so that the filtrate is sent into the corresponding clarification tank based on potential energy.

7. The apparatus for treating the filtrate runoff of a rotary disc system according to claim 6, characterized in that: The lower ends of the mother liquor clarification tank (22), the weak filtrate clarification tank (23), and the strong filtrate clarification tank (24) are respectively provided with outlet pipes C (25), and the lower outlet of each outlet pipe C (25) extends to the top of the sewage tank (10). Each outlet pipe C (25) is provided with a valve (26); when needed, the alkaline solution in the clarification tank is discharged into the sewage tank (10) by potential energy.

8. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: The mother liquor filtrate pipe (14), the weak filtrate pipe (15), and the strong filtrate pipe (16) are respectively connected to the upper middle part of the side wall of the mother liquor vacuum receiving tank (2), the weak filtrate vacuum receiving tank (4), and the strong filtrate vacuum receiving tank (5).

9. The apparatus for treating the runoff of filtrate in a rotary disc system according to claim 1, characterized in that: One end of the gas supply pipe (18) is closed, and the other end is connected to the upper middle part of the side wall of the gas-liquid separator (3). The gas outlet branch pipe (17) is connected to the gas supply pipe (18).

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