Hydrofluoric acid recycling device

Abstract

The utility model discloses a hydrofluoric acid recycling device which comprises a filter box, a filter screen is fixed on the inner side of the filter box, a fixing plate is fixed on the right end face of the inner side of the filter box, a buffer box is fixed on the left end face of the inner side of the filter box, and a buoyancy block is further arranged in the filter box and located above the filter screen. A pump machine is fixed to the right end face of the filter box, a liquid outlet of the pump machine is connected with one end of a liquid discharging pipe, and the other end of the liquid discharging pipe is connected with a graphite boat cleaning machine. According to the hydrofluoric acid recycling device, the liquid inlet buffer mechanism is adopted, waste liquid can be directly located on the lower side of the filter screen when entering the filter box, waste liquid sedimentation and filtration are facilitated, and when the liquid level of the filter box is higher than the liquid outlet of the flow guide pipe, water flow impact can be effectively reduced, and stability of water flow in the filter box is guaranteed; impurities can be conveniently precipitated, the precipitated impurities can be prevented from being stirred, and the precipitation effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrofluoric acid recovery, in particular to a hydrofluoric acid recovery and reuse device. Background Art

[0002] During the operation of the TOPCon production line BSG removal equipment, the high-fluorine waste concentration of hydrofluoric acid is about 32%, and a single machine discharges about 550L (22 hours). As a result, if the wastewater containing hydrofluoric acid from the TOPCon production line BSG removal equipment is directly discharged, it will not only pollute the environment, but also cause waste of hydrofluoric acid. In addition, hydrofluoric acid is required during the use of the graphite boat cleaning machine. Therefore, in view of the above problems, a hydrofluoric acid recovery and reuse device is designed to better meet the actual use needs. Utility Model Content

[0003] The purpose of the utility model is to provide a hydrofluoric acid recovery and recycling device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrofluoric acid recovery and reuse device, comprising a filter box, a filter screen is fixed on the inner side of the filter box, a fixing plate is fixed on the inner right end face of the filter box, a buffer box is fixed on the inner left end face of the filter box, a buoyancy block is also arranged in the filter box, the buoyancy block is located above the filter screen, a pump is fixed on the right end face of the filter box, the liquid outlet of the pump is connected to one end of a drain pipe, and the other end of the drain pipe is connected to a graphite boat cleaning machine.

[0005] Preferably, a liquid inlet pipe is installed at the upper left end of the filter box, and the outlet end of the liquid inlet pipe is located in the buffer box. A drain valve port is installed on the lower end face of the filter box. Through the action of the liquid inlet pipe and the drain valve port, the entry of waste liquid and the discharge of sediment can be facilitated, thereby providing basic guarantee for the normal operation of the device.

[0006] Preferably, vertical rods are vertically fixed between the fixing plates, and the vertical rods are located above the filter net. Through the action of the vertical rods, basic guarantees can be provided for the guidance of the buoyancy blocks.

[0007] Preferably, a guide pipe is fixed to the lower end of the buffer box, and the lower end of the guide pipe is located below the filter screen. A horizontal plate is also fixed in the buffer box. Through the action of the guide pipe, the waste liquid can directly enter the lower side of the filter screen, which is convenient for filtering and precipitation of foreign matter.

[0008] Preferably, a sliding rod is slidably connected to the transverse plate, and the length of the sliding rod is greater than the distance between the transverse plate and the liquid inlet pipe. The sliding guiding effect between the sliding rod and the transverse plate can ensure that the sliding rod can perform stable linear movement.

[0009] Preferably, a buoyancy plate is fixed to the lower end of the slide rod, and a sealing ball is fixed to the upper end of the slide rod, and the sealing ball contacts the liquid inlet pipe to achieve a sealing effect. Through the action of the buoyancy plate, a force can be provided for the slide rod and the sealing ball when the liquid level in the filter box is too high. Through the sealing effect of the sealing ball on the liquid inlet pipe, the entry of external liquid can be prevented, thereby preventing the liquid level in the filter box from being too high and affecting the normal operation of the device.

[0010] Preferably, a connecting block is fixed to the right end of the buoyancy block, and the connecting block and the vertical rod are slidably connected. When the buoyancy block moves, the stability of the movement of the buoyancy block can be ensured by the sliding guiding effect between the connecting block and the vertical rod.

[0011] Preferably, the liquid inlet of the pump is interconnected with one end of the extraction tube, and the other end of the extraction tube passes through the buoyancy block and is connected to the extraction head, and the extraction head is fixed on the lower end surface of the buoyancy block. Through the action of the buoyancy block, the extraction head can be moved with the liquid level, so that the extraction head can extract pure liquid, so as to realize the recovery and utilization of hydrofluoric acid.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the hydrofluoric acid recovery and reuse device adopts a liquid inlet buffer mechanism, which can make the waste liquid directly located on the lower side of the filter screen when the waste liquid enters the filter box, so as to facilitate the sedimentation and filtration of the waste liquid, and when the liquid level in the filter box is higher than the liquid outlet of the guide pipe, the waste liquid entering at this time can effectively reduce the impact of the water flow, ensure the stability of the water flow in the filter box, facilitate the sedimentation of impurities, avoid stirring the precipitated impurities, and ensure the sedimentation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall left-side sectional structure of the device of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall right-side sectional structure of the device of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the buffer box of the utility model.

[0016] In the figure: 1. filter box; 101. liquid inlet pipe; 102. drain valve port; 2. filter screen; 3. fixed plate; 4. vertical rod; 5. buffer box; 501. guide pipe; 502. horizontal plate; 6. sliding rod; 601. buoyancy plate; 602. sealing ball; 7. buoyancy block; 701. connecting block; 8. pump; 801. extraction pipe; 802. extraction head; 9. drain pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-Figure 3 The utility model provides a technical solution: a hydrofluoric acid recovery and reuse device, including a filter box 1, a filter screen 2 is fixed inside the filter box 1, a fixing plate 3 is fixed to the right end face of the inner side of the filter box 1, a buffer box 5 is fixed to the left end face of the inner side of the filter box 1, a buoyancy block 7 is also arranged in the filter box 1, the buoyancy block 7 is located above the filter screen 2, a pump 8 is fixed to the right end face of the filter box 1, the liquid outlet of the pump 8 is connected to one end of a drain pipe 9, and the other end of the drain pipe 9 is connected to a graphite boat cleaning machine.

[0019] A liquid inlet pipe 101 is installed at the upper left end of the filter box 1, and the outlet end of the liquid inlet pipe 101 is located in the buffer box 5, and a sewage valve port 102 is installed on the lower end surface of the filter box 1; a vertical rod 4 is also vertically fixed between the fixed plates 3, and the vertical rod 4 is located above the filter screen 2; a guide pipe 501 is fixed to the lower end of the buffer box 5, and the lower end of the guide pipe 501 is located below the filter screen 2, and a horizontal plate 502 is also fixed in the buffer box 5; a sliding rod 6 is slidably connected to the horizontal plate 502, and the length of the sliding rod 6 is greater than the distance between the horizontal plate 502 and the liquid inlet pipe 101; a buoyancy plate 601 is fixed to the lower end of the sliding rod 6, and a sealing ball 602 is fixed to the upper end of the sliding rod 6, and the sealing ball 602 contacts the liquid inlet pipe 101 to achieve a sealing effect;

[0020] When using the hydrofluoric acid recovery and recycling device, if Figure 1-Figure 3As shown, first install the entire device, and connect the waste liquid pipe to the liquid inlet pipe 101 to facilitate the entry of waste liquid, and then connect the discharge pipe 9 to the graphite boat cleaning machine to facilitate the reuse of the filtered hydrofluoric acid. When the device is in use, the waste liquid enters the buffer box 5 through the liquid inlet pipe 101, and enters the filter box 1 through the guide pipe 501 at the lower end of the buffer box 5, and because the outlet of the guide pipe 501 is below the filter screen 2, the incoming hydrofluoric acid-containing waste liquid can be located below the filter screen 2, which is convenient for the precipitation of large particles of foreign matter in the waste liquid. As the liquid level rises, when the liquid level is higher than the outlet of the guide pipe 501, the waste liquid flowing out of the outlet of the guide pipe 501 directly enters the waste liquid inside the filter box 1, thereby effectively reducing the continuous The incoming liquid impacts the sediment to ensure the normal sedimentation. When the liquid level is higher than the filter screen 2, small particles of foreign matter can be filtered through the filter screen 2 (the number of filter screens 2 can be increased to two layers or more according to actual needs to ensure the filtering effect), so that the filtered pure liquid is located above the filter screen 2. When the pure liquid continues to rise above the position of the buoyancy plate 601, the waste liquid level in the buffer box 5 rises synchronously. When the waste liquid level in the buffer box 5 contacts the buoyancy plate 601, the buoyancy plate 601 can be driven by force to drive the slide bar 6 and the sealing ball 602 to move upward. When the sealing ball 602 contacts the liquid outlet of the liquid inlet pipe 101, a sealing effect can be achieved, thereby stopping the liquid inlet and ensuring the safety of the device.

[0021] A connecting block 701 is also fixed to the right end of the buoyancy block 7, and the connecting block 701 is slidably connected to the vertical rod 4; the liquid inlet of the pump 8 is connected to one end of the extraction pipe 801, and the other end of the extraction pipe 801 passes through the buoyancy block 7 and is connected to the extraction head 802, and the extraction head 802 is fixed to the lower end surface of the buoyancy block 7;

[0022] As the level of pure liquid above the filter 2 rises, Figure 1-Figure 3 As shown, when the pure liquid surface contacts the buoyancy block 7, the buoyancy block 7 moves with the pure liquid surface under the buoyancy, and the sliding guide effect between the connecting block 701 and the vertical rod 4 can ensure the stability of the movement of the buoyancy block 7, so that the real-time adjustment of the position of the extraction head 802 can be achieved to ensure that the extraction head 802 is located directly below the pure liquid surface, and then by starting the pump 8, cooperating with the extraction head 802, the extraction tube 801 and the discharge tube 9, the pure liquid containing hydrofluoric acid can be pumped to the ink boat cleaning machine for reuse, thereby realizing the reuse of hydrofluoric acid and effectively avoiding the waste of hydrofluoric acid. This is the working principle of the hydrofluoric acid recovery and reuse device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrofluoric acid recovery and recycling device, comprising a filter box (1), characterized in that: A filter screen (2) is fixed on the inner side of the filter box (1), a fixing plate (3) is fixed on the inner right end face of the filter box (1), a buffer box (5) is fixed on the inner left end face of the filter box (1), a buoyancy block (7) is also arranged in the filter box (1), the buoyancy block (7) is located above the filter screen (2), a pump (8) is fixed on the right end face of the filter box (1), a liquid outlet of the pump (8) is connected to one end of a liquid discharge pipe (9), and the other end of the liquid discharge pipe (9) is connected to a graphite boat cleaning machine.

2. A hydrofluoric acid recovery and recycling device according to claim 1, characterized in that: A liquid inlet pipe (101) is installed at the upper left end of the filter box (1), and the outlet end of the liquid inlet pipe (101) is located in the buffer box (5). A sewage discharge valve port (102) is installed at the lower end surface of the filter box (1).

3. A hydrofluoric acid recovery and recycling device according to claim 1, characterized in that: A vertical rod (4) is also vertically fixed between the fixing plates (3), and the vertical rod (4) is located above the filter screen (2).

4. A hydrofluoric acid recovery and recycling device according to claim 1, characterized in that: A flow guide pipe (501) is fixed at the lower end of the buffer box (5), and the lower end of the flow guide pipe (501) is located below the filter screen (2). A transverse plate (502) is also fixed inside the buffer box (5).

5. A hydrofluoric acid recovery and recycling device according to claim 4, characterized in that: A sliding rod (6) is slidably connected to the transverse plate (502), and the length of the sliding rod (6) is greater than the distance between the transverse plate (502) and the liquid inlet pipe (101).

6. A hydrofluoric acid recovery and recycling device according to claim 5, characterized in that: A buoyancy plate (601) is fixed to the lower end of the slide bar (6), and a sealing ball (602) is fixed to the upper end of the slide bar (6), and the sealing ball (602) contacts the liquid inlet pipe (101) to achieve a sealing effect.

7. A hydrofluoric acid recovery and recycling device according to claim 1, characterized in that: A connecting block (701) is also fixed to the right end of the buoyancy block (7), and the connecting block (701) is slidably connected to the vertical rod (4).

8. A hydrofluoric acid recovery and recycling device according to claim 1, characterized in that: The liquid inlet of the pump (8) is connected to one end of the extraction pipe (801), and the other end of the extraction pipe (801) passes through the buoyancy block (7) and is connected to the extraction head (802), and the extraction head (802) is fixed on the lower end surface of the buoyancy block (7).

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