A cooling crystallization apparatus for arsenic leach liquor

Abstract

The application discloses a cooling crystallization device for arsenic leaching solution, which comprises a cooling crystallization tank with a corresponding heat exchange jacket arranged on the periphery, a stirring mechanism comprising a hollow rotating shaft, the middle part of the hollow rotating shaft is connected with corresponding arc-shaped stirring plates through a plurality of material collecting pipes, a crystallization material discharging mechanism comprising a discharging one-way valve installed at the bottom of the hollow rotating shaft, a corresponding blocking push plate is installed in the hollow rotating shaft on the upper side of the material collecting pipe and can be lifted, the blocking push plate is rotationally connected to the end of the piston rod of a corresponding lifting drive oil cylinder through a corresponding connecting shaft, at least one liquid discharging one-way valve for discharging liquid material is installed on the blocking push plate, a corresponding filter screen plate is fixedly connected to the bottom side of the liquid discharging one-way valve, and the opening pressure of the liquid discharging one-way valve is smaller than that of the discharging one-way valve. The application can effectively separate the solid and liquid of part of the crystallized material, and can timely output the crystallization material after the solid-liquid separation.

Description

Technical Field

[0001] This invention relates to a cooling crystallization apparatus for arsenic leaching solution, which is mainly used to cool and crystallize arsenic leaching solution after reduction to obtain arsenic trioxide product. Background Technology

[0002] The flue gas generated during copper smelting can produce sulfuric acid products annually after collection and processing. However, it also leaves behind thousands of tons of difficult-to-treat arsenic filter cake. These filter cakes contain various heavy metals, and if discharged indiscriminately, they will not only cause resource loss but also lead to environmental pollution.

[0003] Currently, the processing of arsenic filter cake involves several steps. First, the arsenic filter cake needs to be pulped. The pulped arsenic filter cake slurry is then pumped into an oxygen pressure reactor for continuous oxygen pressure leaching to extract the metals from the arsenic filter cake slurry. Subsequently, a solid-liquid separation device is used to separate the arsenic filter cake slurry after oxygen pressure leaching, yielding filter residue and As-containing material. 5+ The leachate; subsequently, in an As-containing solution... 5+ Sulfur dioxide was added to the leachate for reduction, and the reduced leachate was cooled and crystallized, and finally dried to obtain arsenic trioxide product (99.5%).

[0004] Existing cooling crystallization devices for arsenic leachate mainly consist of cooling crystallization tanks equipped with heat exchange jackets. A stirring device within the tank effectively agitates the arsenic leachate, ensuring thorough cooling and crystallization to obtain the corresponding arsenic trioxide product. The crystallized material is then pumped to a solid-liquid separation unit for separation, and finally transferred to a drying unit for further drying. Because the crystallized material has a relatively high solids content, it not only hinders pumping but also results in a relatively large workload for subsequent solid-liquid separation, which is quite cumbersome.

[0005] Therefore, the research objective of this invention is to design a cooling crystallization device that can effectively separate the solid and liquid components of the crystallized material and output the arsenic leachate in a timely manner. Summary of the Invention

[0006] In view of the technical problems existing in the prior art, the present invention provides a cooling crystallization device for arsenic leaching solution, which can effectively solve the technical problems existing in the prior art.

[0007] The technical solution of this invention is:

[0008] A cooling crystallization apparatus for arsenic leachate, comprising:

[0009] A cooling crystallization tank is provided with a heat exchange jacket around its periphery. The heat exchange jacket is provided with a heat exchange medium inlet pipe and a heat exchange medium outlet pipe for the flow of the heat exchange medium. The upper and lower ends of the cooling crystallization tank are respectively provided with a feed pipe and a discharge pipe.

[0010] The stirring mechanism includes a hollow rotating shaft rotatably disposed inside the cooling crystallization tank. The hollow rotating shaft is connected to a corresponding arc-shaped stirring plate through multiple material collection pipes in the middle. The hollow rotating shaft is driven by a corresponding drive motor.

[0011] The crystallizer discharge mechanism includes a hollow rotating shaft with a bottom seal extending to the outside of the cooling crystallizer. The crystallizer discharge mechanism includes a discharge check valve installed at the bottom of the hollow rotating shaft. A corresponding baffle plate is vertically mounted inside the hollow rotating shaft on the upper side of the collecting pipe. The baffle plate is rotatably connected to the piston rod end of a corresponding lifting drive cylinder via a corresponding connecting shaft. At least one liquid removal check valve for discharging liquid material is installed on the baffle plate. A corresponding filter screen is fixed to the bottom side of the liquid removal check valve. The opening pressure of the liquid removal check valve is less than the opening pressure of the discharge check valve.

[0012] A corresponding support is fixedly installed on the bottom side of the hollow rotating shaft. The discharge check valve includes a fixed bearing connected to the upper part of the support through a first helical spring. An abutment seal with a spherical top is fixedly installed on the inner ring of the fixed bearing. The upper part of the abutment seal abuts against the bottom end of the hollow rotating shaft.

[0013] The sealing element has a corresponding guide hole in the middle. The connecting shaft can move through the guide hole and rotatably connect to the piston rod end of the lifting drive cylinder. A set of sealing gaskets with their inner ends abutting the connecting shaft are embedded in the guide hole.

[0014] The push plate has corresponding stepped holes at positions corresponding to the liquid removal check valve. The liquid removal check valve includes a ball valve core for closing the stepped holes and a second helical spring for providing fixed support to the ball valve core. The stiffness of the second helical spring is less than that of the first helical spring.

[0015] The hollow rotating shaft on the lower side of the collecting pipe is equipped with a corresponding isolation cover. Multiple corresponding filter holes are evenly distributed on the hollow rotating shaft in the area where the isolation cover is located, and several corresponding liquid discharge pipes are arranged at intervals on the outside of the isolation cover.

[0016] The liquid ejection pipes are arranged in an arc shape, and the arc trajectory of the liquid ejection pipes is opposite to the rotation direction of the hollow rotating shaft; the arc trajectory of the arc-shaped stirring plate is consistent with the rotation direction of the hollow rotating shaft.

[0017] The bottom side of the push plate is provided with at least one corresponding fixed mounting groove, and the push plate is provided with a connecting hole whose bottom is connected to the fixed mounting groove. A mounting block capable of closing the connecting hole is oscillatingly installed in the fixed mounting groove.

[0018] The insert is hollow. When the push plate moves downward, the insert contacts the material and swings upward to close the connecting hole.

[0019] The discharge pipe of the cooling crystallizer is connected in parallel to a set of corresponding discharge pumps through a set of corresponding discharge valves.

[0020] The top of the cooling crystallization tank is equipped with an opening and closing inspection port, and the inspection port is equipped with an opening and closing cover plate.

[0021] Advantages of this invention:

[0022] 1) The stirring mechanism of the present invention includes a hollow rotating shaft rotatably disposed in a cooling crystallization tank. The middle part of the hollow rotating shaft is connected to a corresponding arc-shaped stirring plate through multiple collection pipes. During the process of the hollow rotating shaft driving the arc-shaped stirring plate to stir the material, it can guide and collect the solid crystals after crystallization in a timely manner, so that they flow into the hollow rotating shaft through the collection pipes. On this basis, the present invention further adds a crystal discharge mechanism, which includes a discharge check valve installed at the bottom of the hollow rotating shaft. A corresponding baffle plate is installed in the hollow rotating shaft on the upper side of the collection pipe. The baffle plate is rotatably connected to the piston rod end of the corresponding lifting drive cylinder through a corresponding connecting shaft. At least one liquid removal check valve for discharging liquid material is installed on the baffle plate. A corresponding filter screen plate is fixed to the bottom side of the liquid removal check valve. Most importantly, the opening pressure of the liquid removal check valve is less than the opening pressure of the discharge check valve.

[0023] When outputting the solid crystals flowing into the hollow rotating shaft, the lifting drive cylinder drives the push plate downwards. The liquid material is discharged through the liquid removal check valve. After the liquid material is discharged, the push plate presses against the upper side of the solid crystals. As the thrust increases, the solid crystals effectively open the discharge check valve and are discharged. In this way, a portion of the crystallized material can be effectively separated into solid and liquid, and the separated crystals can be output in a timely manner, thereby effectively reducing the solid content in the material. This facilitates the pumping of the crystallized arsenic leachate and effectively reduces the workload of subsequent solid-liquid separation operations.

[0024] 2) A corresponding support is fixedly installed on the bottom side of the hollow rotating shaft of the present invention. The discharge check valve includes a fixed bearing connected to the upper part of the support via a first helical spring. The abutment seal is rotatably installed on the inner ring of the fixed bearing. A guide hole is provided in the middle of the abutment seal. The connecting shaft can move through the guide hole and rotatably connect to the piston rod end of the lifting drive cylinder. A set of sealing gaskets with their inner ends abutting against the connecting shaft are embedded in the guide hole. In this way, the rotatable setting of the abutment seal and the ball valve core can be effectively realized, thereby adapting to the stirring rotation requirements of the hollow rotating shaft, and effectively ensuring the installation sealing of the connecting shaft, thus ensuring the practical effect of the present invention.

[0025] 3) The hollow rotating shaft on the lower side of the collecting pipe of the present invention is equipped with an isolation cover. Multiple corresponding filter holes are evenly distributed on the hollow rotating shaft in the area where the isolation cover is located. Several corresponding liquid discharge pipes are arranged at intervals outside the isolation cover. These liquid discharge pipes are arc-shaped, and their arc trajectory is opposite to the rotation direction of the hollow rotating shaft, while the arc trajectory of the arc-shaped stirring plate is consistent with the rotation direction of the hollow rotating shaft. In this way, the arc-shaped stirring plate can perform shovel-style stirring of the material as the hollow rotating shaft rotates, thus ensuring both the stirring effect and effectively guiding the solid crystals in the material to the collecting pipe. The liquid discharge pipes, while assisting in stirring the material, effectively throw out the liquid material through centrifugal force, thereby ensuring the smooth collection of solid crystals.

[0026] 4) The bottom side of the baffle plate of the present invention is provided with at least one corresponding fixed insert groove and a connecting hole that connects to the fixed insert groove at the bottom. An insert block capable of sealing the connecting hole is oscillatingly installed in the fixed insert groove. The insert block is hollow and therefore has a certain buoyancy. When the baffle plate moves downward, the insert block contacts the material and swings upward to seal the connecting hole of the baffle plate, so as to facilitate solid-liquid separation of the material and smooth output of solid crystals. When the baffle plate moves upward, the insert block swings downward under the action of gravity, thereby releasing the seal of the connecting hole. This ensures that the baffle plate can be smoothly driven upward and reset, and effectively guides the material on the upper part of the baffle plate back to its bottom side, thereby further ensuring the practical effect of the present invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a diagram showing the usage state of the present invention.

[0029] Figure 3 This is a cross-sectional view of the present invention.

[0030] Figure 4This is an assembly diagram of the stirring mechanism of the present invention.

[0031] Figure 5 This is an assembly cross-sectional view of the stirring mechanism of the invention.

[0032] Figure 6 This is a schematic diagram of the assembly of the discharge check valve of the present invention.

[0033] Figure 7 This is a schematic diagram of the assembly of the liquid removal check valve of the present invention.

[0034] In the attached diagram: 1. Cooling crystallizer; 101. Feed pipe; 102. Discharge pipe; 2. Heat exchange jacket; 201. Heat exchange medium inlet pipe; 202. Heat exchange medium outlet pipe; 3. Stirring mechanism; 301. Hollow rotating shaft; 302. Collecting pipe; 303. Arc-shaped stirring plate; 4. Drive motor; 5. Crystallized material discharge mechanism; 501. Discharge check valve; 501. First helical spring; 5011. Fixed bearing; 5012. Abutment seal; 5013. Push plate; 502. Connecting shaft; 503. Lifting drive cylinder; 504. Filter screen; 505. Liquid removal check valve; 506. Ball valve core; 5061. Second helical spring; 5062. Support; 6. Sealing gasket; 7. Isolation cover; 8. Filter hole; 9. Liquid discharge pipe; 10. Fixed embedding groove; 11. Embedding block; 12. Discharge valve; 13. Discharge pump; 14. Cover plate; 15. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:

[0036] refer to Figure 1-7 A cooling crystallization apparatus for arsenic leachate, comprising:

[0037] A cooling crystallization tank 1 is provided with a heat exchange jacket 2 around its periphery. The heat exchange jacket 2 is provided with a heat exchange medium inlet pipe 201 and a heat exchange medium outlet pipe 202 for the flow of heat exchange medium. The upper and lower ends of the cooling crystallization tank 1 are respectively provided with a feed pipe 101 and a discharge pipe 102.

[0038] The stirring mechanism 3 includes a hollow rotating shaft 301 rotatably disposed inside the cooling crystallization tank 1. The middle part of the hollow rotating shaft 301 is connected to a corresponding arc-shaped stirring plate 303 through multiple material collection pipes 302, and the hollow rotating shaft 301 is driven by a corresponding drive motor 4.

[0039] The crystallizer discharge mechanism 5 has a bottom seal extending through the hollow rotating shaft 301 to the outside of the cooling crystallization tank 1. The crystallizer discharge mechanism 5 includes a discharge check valve 501 installed at the bottom of the hollow rotating shaft 301. A corresponding baffle plate 502 is vertically mounted inside the hollow rotating shaft 301 on the upper side of the collecting pipe 302. The baffle plate 502 is rotatably connected to the piston rod end of the corresponding lifting drive cylinder 504 through a corresponding connecting shaft 503. At least one liquid removal check valve 506 for discharging liquid material is installed on the baffle plate 502. A corresponding filter screen plate 505 is fixed to the bottom side of the liquid removal check valve 506. The opening pressure of the liquid removal check valve 506 is less than the opening pressure of the discharge check valve 501.

[0040] The stirring mechanism 3 of the present invention includes a hollow rotating shaft 301 rotatably disposed within the cooling crystallization tank 1. The central part of the hollow rotating shaft 301 is connected outwards to corresponding arc-shaped stirring plates 303 via multiple collecting pipes 302. During the process of the hollow rotating shaft 301 driving the arc-shaped stirring plates 303 to stir the material, it can promptly guide and collect the solid crystals after crystallization, allowing them to flow into the hollow rotating shaft 301 through the collecting pipes 302. Furthermore, the present invention further includes a crystal discharge mechanism 5, which includes components installed on the hollow rotating shaft... The bottom of 301 has a discharge check valve 501, and a corresponding baffle plate 502 is installed in the hollow rotating shaft 301 on the upper side of the collecting pipe 302. The baffle plate 502 is rotatably connected to the piston rod end of the corresponding lifting drive cylinder 504 through the corresponding connecting shaft 503. At least one liquid removal check valve 506 for discharging liquid material is installed on the baffle plate 502. A corresponding filter screen plate 505 is fixed to the bottom side of the liquid removal check valve 506. Most importantly, the opening pressure of the liquid removal check valve 506 is less than the opening pressure of the discharge check valve 501. When the solid crystals flowing into the hollow rotating shaft 301 are discharged, the lifting drive cylinder 504 drives the push plate 502 downward. The liquid material is discharged through the liquid removal check valve 506. After the liquid material is discharged, the push plate 502 presses against the upper side of the solid crystals. As the thrust increases, the solid crystals effectively open the discharge check valve 501 and are discharged. In this way, the solid-liquid separation of the crystallized material can be effectively performed, and the crystals after solid-liquid separation can be discharged in a timely manner, thereby effectively reducing the solid content in the material, facilitating the pumping of the crystallized arsenic leachate, and effectively reducing the amount of subsequent solid-liquid separation work.

[0041] A corresponding support member 6 is fixedly provided on the bottom side of the hollow rotating shaft 301. The discharge one-way valve 501 includes a fixed bearing 5012 connected to the upper part of the support member 6 by a first helical spring 5011. An abutment seal member 5013 with a spherical top is fixedly installed on the inner ring of the fixed bearing 5012. The upper part of the abutment seal member 5013 seals against the bottom end of the hollow rotating shaft 301.

[0042] A corresponding guide hole is provided in the middle of the abutting seal 5013. The connecting shaft 503 can be moved through the guide hole and rotatably connected to the piston rod end of the lifting drive cylinder 504. A set of sealing gaskets 7 with their inner ends abutting the connecting shaft 503 are embedded in the guide hole.

[0043] The push plate 502 is provided with corresponding stepped holes at positions corresponding to the liquid removal check valve 506. The liquid removal check valve 506 includes a ball valve core 5061 for closing the stepped holes and a second helical spring 5062 for providing fixed support for the ball valve core 5061. The stiffness of the second helical spring 5062 is less than the stiffness of the first helical spring 5011.

[0044] The hollow rotating shaft 301 of the present invention has a corresponding support member 6 fixedly installed on its bottom side. The discharge check valve 501 includes a fixed bearing 5012 connected to the upper part of the support member 6 by a first helical spring 5011. The abutment seal 5013 is rotatably installed on the inner ring of the fixed bearing 5012. A guide hole is provided in the middle of the abutment seal 5013. The connecting shaft 503 can move through the guide hole and rotatably connect to the piston rod end of the lifting drive cylinder 504. A set of sealing gaskets 7 with their inner ends abutting against the connecting shaft 503 are embedded in the guide hole. In this way, the abutment seal 5013 and the ball valve core 5061 can be rotatably set to meet the stirring and rotation requirements of the hollow rotating shaft (301) and can effectively ensure the installation sealing of the connecting shaft 503, so as to ensure the practical effect of the present invention.

[0045] The hollow rotating shaft 301 on the lower side of the collection pipe 302 is provided with a corresponding isolation cover 8. Multiple corresponding filter holes 9 are evenly distributed on the hollow rotating shaft 301 in the area where the isolation cover 8 is located, and several corresponding liquid discharge pipes 10 are arranged at intervals on the outside of the isolation cover 8.

[0046] The liquid discharge pipe 10 is arranged in an arc shape, and the arc trajectory of the liquid discharge pipe 10 is opposite to the rotation direction of the hollow rotating shaft 301; the arc trajectory of the arc-shaped stirring plate 303 is consistent with the rotation direction of the hollow rotating shaft 301.

[0047] The hollow rotating shaft 301 on the lower side of the collecting pipe 302 of this invention is sealed with an isolation cover 8. Multiple corresponding filter holes 9 are evenly distributed on the hollow rotating shaft 301 in the area where the isolation cover 8 is located. Several corresponding liquid ejection pipes 10 are arranged at intervals outside the isolation cover 8. These liquid ejection pipes 10 are arc-shaped, and their arc trajectory is opposite to the rotation direction of the hollow rotating shaft 301. The arc trajectory of the arc-shaped stirring plate 303 is consistent with the rotation direction of the hollow rotating shaft 301. In this way, the arc-shaped stirring plate 303 can perform shovel-style stirring of the material as the hollow rotating shaft 301 rotates, thus ensuring both effective stirring of the material and effectively guiding solid crystals in the material to the collecting pipe 302. The liquid ejection pipes 10, while assisting in stirring the material, effectively eject the liquid material through centrifugal force, thereby ensuring the smooth collection of solid crystals.

[0048] The bottom side of the push plate 502 is provided with at least one corresponding fixed mounting groove 11, and the push plate 502 is provided with a connecting hole whose bottom is connected to the fixed mounting groove 11. A mounting block 12 capable of closing the connecting hole is oscillatingly installed in the fixed mounting groove 11. The mounting block 12 is hollow. When the push plate 502 moves downward, the mounting block 12 contacts the material and swings upward to close the connecting hole. Therefore, the mounting block has a certain buoyancy. When the push plate 502 moves downward, the insert block 12 swings upward after contacting the material and being subjected to force, thereby sealing the connecting hole of the push plate 502 to facilitate solid-liquid separation of the material and smooth output of solid crystals. When the push plate 502 moves upward, the insert block 12 swings downward under the action of gravity, thereby releasing the seal of the connecting hole. This ensures that the push plate 502 can be smoothly driven upward and reset, and effectively guides the material on the upper part of the push plate 502 back to its bottom side, further ensuring the practical effect of the present invention.

[0049] The discharge pipe of the cooling crystallization tank 1 is connected in parallel to a set of corresponding discharge pumps 14 through a set of corresponding discharge valves 13. During the discharge process, one discharge pump 14 can be used for discharge operation, while the other is kept as a backup for maintenance of the discharge pump 14.

[0050] The top of the cooling crystallization tank 1 is provided with a corresponding inspection port that can be opened and closed, and a corresponding cover plate 15 is installed at the inspection port that can be opened and closed.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cooling and crystallization apparatus for arsenic leachate, characterized in that, include: Cooling crystallizer (1), the cooling crystallizer (1) is provided with a corresponding heat exchange jacket (2) on its periphery, the heat exchange jacket (2) is provided with a heat exchange medium inlet pipe (201) and a heat exchange medium outlet pipe (202) for heat exchange medium flow, and the upper and lower ends of the cooling crystallizer (1) are respectively provided with a corresponding feed pipe (101) and a discharge pipe (102). The stirring mechanism (3) includes a hollow rotating shaft (301) rotatably disposed in the cooling crystallization tank (1). The hollow rotating shaft (301) is connected to a corresponding arc-shaped stirring plate (303) through multiple material collection pipes (302) in the middle. The hollow rotating shaft (301) is driven by a corresponding drive motor (4). The crystal discharge mechanism (5) has a bottom seal extending through the hollow rotating shaft (301) to the outside of the cooling crystallization tank (1). The crystal discharge mechanism (5) includes a discharge check valve (501) installed at the bottom of the hollow rotating shaft (301). A corresponding baffle plate (502) is installed in the hollow rotating shaft (301) on the upper side of the collecting pipe (302). The baffle plate (502) is rotatably connected to the piston rod end of the corresponding lifting drive cylinder (504) through a corresponding connecting shaft (503). At least one liquid removal check valve (506) for discharging liquid material is installed on the baffle plate (502). A corresponding filter screen plate (505) is fixed to the bottom side of the liquid removal check valve (506). The opening pressure of the liquid removal check valve (506) is less than the opening pressure of the discharge check valve (501).

2. The cooling and crystallization apparatus for arsenic leachate according to claim 1, characterized in that, The hollow rotating shaft (301) is fixedly provided with a corresponding support member (6) on its bottom side. The discharge check valve (501) includes a fixed bearing (5012) connected to the upper part of the support member (6) by a first helical spring (5011). The inner ring of the fixed bearing (5012) is fixedly installed with an abutment seal (5013) with a spherical top. The upper part of the abutment seal (5013) seals against the bottom end of the hollow rotating shaft (301).

3. The cooling and crystallization apparatus for arsenic leachate according to claim 2, characterized in that, The abutting seal (5013) has a corresponding guide hole in the middle. The connecting shaft (503) can move through the guide hole and rotatably connect to the piston rod end of the lifting drive cylinder (504). A set of sealing gaskets (7) with their inner ends abutting the connecting shaft (503) are embedded in the guide hole.

4. The cooling and crystallization apparatus for arsenic leachate according to claim 2, characterized in that, The push plate (502) is provided with corresponding stepped holes at positions corresponding to the liquid removal check valve (506). The liquid removal check valve (506) includes a ball valve core (5061) for closing the stepped holes and a second helical spring (5062) for providing fixed support for the ball valve core (5061). The stiffness of the second helical spring (5062) is less than the stiffness of the first helical spring (5011).

5. The cooling and crystallization apparatus for arsenic leachate according to claim 1, characterized in that, A corresponding isolation cover (8) is provided on the hollow rotating shaft (301) on the lower side of the collecting pipe (302). Multiple corresponding filter holes (9) are evenly distributed on the hollow rotating shaft (301) in the area where the isolation cover (8) is located, and several corresponding liquid discharge pipes (10) are provided at intervals on the outside of the isolation cover (8).

6. The cooling and crystallization apparatus for arsenic leachate according to claim 5, characterized in that, The liquid ejection pipe (10) is distributed in an arc shape, and the arc trajectory of the liquid ejection pipe (10) is opposite to the rotation direction of the hollow rotating shaft (301); the arc trajectory of the arc-shaped stirring plate (303) is consistent with the rotation direction of the hollow rotating shaft (301).

7. The cooling and crystallization apparatus for arsenic leachate according to claim 1, characterized in that, The bottom side of the push plate (502) is provided with at least one corresponding fixed mounting groove (11), and the push plate (502) is provided with a connecting hole whose bottom is connected to the fixed mounting groove (11). A mounting block (12) capable of closing the connecting hole is oscillatingly installed in the fixed mounting groove (11).

8. The cooling and crystallization apparatus for arsenic leachate according to claim 7, characterized in that, The insert (12) is hollow. When the push plate (502) moves downward, the insert (12) contacts the material and swings upward to close the connecting hole.

9. The cooling and crystallization apparatus for arsenic leachate according to claim 1, characterized in that, The discharge pipe of the cooling crystallizer (1) is connected in parallel to a set of corresponding discharge pumps (14) through a set of corresponding discharge valves (13).

10. The cooling and crystallization apparatus for arsenic leachate according to claim 1, characterized in that, The top of the cooling crystallization tank (1) is provided with a corresponding inspection port that can be opened and closed, and a corresponding cover plate (15) is installed at the inspection port.

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