Arsenic oxide cooling crystallization liquid inlet device

Abstract

The utility model relates to the technical field of arsenic oxide crystallization, in particular to an arsenic oxide cooling crystallization liquid inlet device, which comprises a crystallization kettle, a guide plate, a diversion barrel and a circulating pump, a mounting hole is formed in the middle of the guide plate, a hollow sleeve is fixedly connected in the mounting hole, and the top of the hollow sleeve is fixedly connected with an upper cover of the crystallization kettle. The flow guide plate plays a role in dispersing water flow, the flow dividing barrel is fixedly connected to an upper cover of the crystallization kettle, and an inner cavity of the flow dividing barrel is fixedly communicated with flow dividing pipelines arranged in a circumferential array. Through the cooperative design of a flow guide plate, a flow dividing barrel, a flow dividing pipeline and a circulating pump, an arsenic solution in a crystallization kettle can be pumped by the circulating pump and conveyed into the flow dividing barrel, the arsenic solution flows out in a water flow column state through the flow dividing barrel, and under interception of the flow guide plate, the water flow column is scattered into a water curtain; and the water curtain is sprayed on the inner wall of the crystallization kettle and flows down from the inner wall for rapid cooling, so that the cold and heat transfer effect is good and the crystallization process of the arsenic solution is accelerated through a circulating cooling mode.

Description

Technical Field

[0001] The utility model relates to the technical field of arsenic oxide crystallization, in particular to a liquid inlet device for cooling and crystallizing arsenic oxide. Background Art

[0002] Arsenic oxide is mainly used in the preparation of arsenate, dye and printing industries, etc. It can also be used as an insecticide. Arsenic oxide is usually divided into two oxidation states: trivalent and pentavalent. The method for preparing trivalent arsenic is usually to first reduce pentavalent arsenic to trivalent arsenic, and then use the principle that trivalent arsenic has very low solubility at low temperatures to precipitate it by cooling crystallization to obtain a trivalent arsenic product.

[0003] Most of the existing cooling crystallization devices are designed with a cooling jacket on the outer wall of the crystallization kettle. This cooling method will cause a certain temperature difference between the solution in the middle of the kettle and the solution in contact with the inner wall of the kettle, and the cooling effect is uneven. There is also a stirring method to make the solution flow in the crystallization kettle to cool down, but the stirring trajectory of the stirring mechanism is fixed, and the heat transfer effect of the solution is not very good. The crystallization time period of the solution is long, and the efficiency needs to be improved. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an arsenic oxide cooling crystallization liquid inlet device, which effectively solves the problem that most of the existing cooling crystallization devices are designed with a cooling jacket on the outer wall of the crystallization kettle, so that there is a certain temperature difference between the solution in the middle of the kettle body and the solution in contact with the inner wall of the kettle body, and the cooling effect is uneven. There is also a stirring method to make the solution flow in the crystallization kettle to cool it, but the stirring trajectory of the stirring mechanism is fixed, the heat transfer effect of the solution is not good, the crystallization time period of the solution is long, and the efficiency needs to be improved.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: an arsenic oxide cooling crystallization liquid feeding device, including a crystallization kettle, a guide plate, a diversion barrel and a circulation pump;

[0006] The guide plate is horizontally arranged inside the crystallization kettle, and the outer side of the guide plate is close to the inner wall of the crystallization kettle;

[0007] A mounting hole is provided in the middle of the guide plate, and a hollow sleeve is fixedly connected inside the mounting hole, and the top of the hollow sleeve is fixedly connected to the crystallization kettle;

[0008] The diversion barrel is fixedly connected to the top of the crystallization kettle;

[0009] The inner cavity of the diversion barrel is fixedly connected with a diversion pipe in a circumferential array, the lower end of the diversion pipe is connected to the inner cavity of the crystallization kettle, and the lower end of the diversion pipe is inclined outward and close to the outer periphery of the guide plate;

[0010] The circulating pump is installed on the top of the crystallization kettle, the suction end of the circulating pump is connected to the inner cavity at the bottom of the crystallization kettle, and the output end of the circulating pump is connected to the inner cavity of the diversion barrel.

[0011] Furthermore, a drainage cone is fixedly connected to the outer surface of the hollow sleeve.

[0012] Furthermore, the outer periphery of the guide plate is fixedly connected with guide strips in a circular array.

[0013] Furthermore, a motor is installed on the top of the crystallization kettle, and a rotating shaft is fixedly connected to the output end of the motor. The rotating shaft is concentrically arranged with the hollow sleeve and rotatably connected to the hollow sleeve through a bearing, and a stirring shaft is fixedly connected to the outer surface of the rotating shaft.

[0014] Furthermore, the outer surface of the stirring shaft is fixedly connected with a bifurcated rod facing in different directions, the outer surface of the bifurcated rod is rotatably connected with a rotating cylinder, and the outer surface of the rotating cylinder is fixedly connected with an arc-shaped blade.

[0015] Furthermore, a scraper is fixedly connected to the end of the stirring shaft, and the scraper is in contact with the inner wall of the crystallization kettle.

[0016] Furthermore, a refrigeration jacket is fixedly arranged on the outer surface of the crystallization kettle.

[0017] Furthermore, the crystallization kettle comprises a kettle body and an upper cover, the kettle body and the upper cover are fixedly connected by bolts, and the circulation pump, the diversion barrel, the hollow sleeve and the motor are all fixed to the upper cover.

[0018] Furthermore, a feed pipe is fixed inside the upper cover, and a discharge pipe is fixedly connected to the bottom of the crystallization kettle.

[0019] The beneficial effects of the above technical solution are:

[0020] 1. The utility model, through the coordinated design of the guide plate, the diversion barrel, the diversion pipeline and the circulation pump, can enable the circulation pump to extract the arsenic solution in the crystallization kettle and transport it into the diversion barrel. The arsenic solution flows out through the diversion pipeline in the form of a water column. Under the interception of the guide plate, the water column is broken up into a water curtain, and the water curtain is sprayed on the inner wall of the crystallization kettle and flows down from the inner wall to quickly cool down. Through the circulation cooling method, the heat transfer effect is good, the cooling effect is uniform, and the crystallization process of the arsenic solution is accelerated.

[0021] 2. The utility model adopts the coordinated design of the stirring shaft, the bifurcated rod, the rotating cylinder and the arc-shaped blades. When the stirring shaft rotates, the arsenic solution blocks the arc-shaped blades, so that the arc-shaped blades rotate around the bifurcated rod, thereby further disturbing the arsenic solution, and the heat transfer effect is better. The end of the stirring shaft is fixedly connected with a scraper, and the scraper is in contact with the inner wall of the crystallization kettle. The scraper can be used to scrape off the crystals on the side wall of the crystallization kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 This is a cross-sectional view of the utility model;

[0024] Figure 3 For this utility model Figure 2 A magnified view of the structure at center;

[0025] Figure 4 This is a schematic diagram of the connection between the guide plate and the guide strip of the utility model;

[0026] Figure 5 This is a cross-sectional view of the connection between the bifurcated rod and the rotating cylinder of the utility model.

[0027] Figure numerals: 1. crystallization kettle; 2. circulation pump; 3. refrigeration jacket; 4. arc blades; 5. diversion barrel; 6. diversion pipe; 7. feed pipe; 8. guide strip; 9. bifurcated rod; 10. hollow sleeve; 11. guide plate; 12. drainage cone; 13. rotating shaft; 14. scraper; 15. stirring shaft; 16. rotating cylinder; 17. motor. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0029] Reference Figure 1-5 A liquid feeding device for cooling and crystallizing arsenic oxide comprises a crystallization kettle 1, a guide plate 11, a diversion barrel 5 and a circulation pump 2. The crystallization kettle 1 comprises a kettle body and an upper cover, which are fixedly connected with the upper cover by bolts. The kettle body and the upper cover can be separated by removing the bolts, which is convenient for later inspection and maintenance of the internal components of the crystallization kettle 1. A feed pipe 7 is fixed in the upper cover, and an appropriate amount of reduced arsenic solution is added into the crystallization kettle 1 through the feed pipe 7. A discharge pipe is fixedly connected to the bottom of the crystallization kettle 1, and the reacted solution in the crystallization kettle 1 is discharged through the discharge pipe. Solenoid valves are installed inside the feed pipe 7 and the discharge pipe.

[0030] The outer surface of the crystallization kettle 1 is fixedly provided with a refrigeration jacket 3, which can cool the side wall of the crystallization kettle 1. The refrigeration jacket is a prior art. The refrigeration jacket is a layered structure surrounding the outside of the crystallization kettle. It can adjust the temperature of the material in the kettle by cooling the wall of the crystallization kettle. The guide plate 11 is horizontally arranged inside the crystallization kettle 1. The outer side of the guide plate 11 is close to the inner wall of the crystallization kettle 1. A mounting hole is opened in the middle of the guide plate 11, and a hollow sleeve 10 is fixedly connected to the inside of the mounting hole. The top of the hollow sleeve 10 is fixedly connected to the upper cover of the crystallization kettle 1. The guide plate 11 plays a role in dispersing water flow. The diverter barrel 5 is fixedly connected to the upper cover of the crystallization kettle 1. The inner cavity of the diverter barrel 5 is fixedly connected with a diverter pipe 6 in a circumferential array. The lower end of the diverter pipe 6 is connected to the inner cavity of the crystallization kettle 1. The diverter pipe 6 can evenly distribute the arsenic solution in the diverter barrel 5. The arsenic solution in the crystallization kettle 1 is dispersed and flows out, the lower end of the shunt pipe 6 is inclined outward and close to the outer periphery of the guide plate 11, the circulation pump 2 is installed on the upper cover of the crystallization kettle 1, the suction end of the circulation pump 2 is connected with the inner cavity at the bottom of the crystallization kettle 1, and the suction end of the circulation pump 2 is installed with a filter cloth to prevent the arsenic crystals from being sucked in. The output end of the circulation pump 2 is connected with the inner cavity of the shunt barrel 5. Through the coordinated design of the guide plate 11, the shunt barrel 5, the shunt pipe 6 and the circulation pump 2, the circulation pump 2 can extract the arsenic solution in the crystallization kettle 1 and transport it into the shunt barrel 5. The arsenic solution flows out through the shunt pipe 6 in the form of a water column. Under the interception of the guide plate 11, the water column is broken up into a water curtain, and the water curtain is sprayed on the inner wall of the crystallization kettle 1 and flows down from the inner wall for rapid cooling. Through the circulation cooling method, the heat transfer effect is good, the cooling effect is uniform, and the crystallization process of the arsenic solution is accelerated.

[0031] The outer surface of the hollow sleeve 10 is fixedly connected with a drainage cone 12. The drainage cone 12 can prevent the water column flowing out of the diversion pipe 6 from flowing inward. The outer periphery of the guide plate 11 is fixedly connected with guide strips 8 in a circular array. The guide strips 8 that can be set can further enhance the dispersion effect of the water column.

[0032] The upper cover of the crystallization kettle 1 is equipped with a motor 17, and the output end of the motor 17 is fixedly connected to the rotating shaft 13. The rotating shaft 13 is concentrically arranged with the hollow sleeve 10 and is rotatably connected to the hollow sleeve 10 through a bearing. The outer surface of the rotating shaft 13 is fixedly connected to the stirring shaft 15, so that the motor 17 can drive the stirring shaft 15 to rotate through the rotating shaft 13, so that the stirring shaft 15 stirs the arsenic solution, so that the arsenic solution circulates in the crystallization kettle 1, and the heat transfer in the arsenic solution is enhanced, thereby accelerating the crystallization process.

[0033] The outer surface of the stirring shaft 15 is fixedly connected with a forked rod 9 facing differently, the outer surface of the forked rod 9 is rotatably connected with a rotating cylinder 16, the outer surface of the rotating cylinder 16 is fixedly connected with an arc-shaped blade 4, through the coordinated design of the forked rod 9, the rotating cylinder 16 and the arc-shaped blade 4, when the stirring shaft 15 rotates, the arsenic solution blocks the arc-shaped blade 4, so that the arc-shaped blade 4 rotates around the forked rod 9, thereby further disturbing the arsenic solution, and the heat transfer effect is better, the end of the stirring shaft 15 is fixedly connected with a scraper 14, the scraper 14 is in contact with the inner wall of the crystallization kettle 1, and the scraper 14 is arranged to scrape off the crystals on the side wall of the crystallization kettle 1.

[0034] After the reaction is completed, the solenoid valve of the discharge pipe is opened, and the solution containing arsenic crystals is discharged through the discharge pipe for subsequent collection steps. Then, clean water is injected from the feed pipe 7 and sent to the diversion pipe 6 through the circulation pump 2 to flush the inner wall of the crystallization kettle 1. The flushed water flows out from the discharge pipe.

Claims

1. A liquid inlet device for cooling and crystallizing arsenic oxide, characterized in that: It comprises a crystallization kettle (1), a guide plate (11), a diversion barrel (5) and a circulation pump (2); The guide plate (11) is horizontally arranged inside the crystallization kettle (1), and the outer side of the guide plate (11) is close to the inner wall of the crystallization kettle (1); A mounting hole is provided in the middle of the guide plate (11), and a hollow sleeve (10) is fixedly connected inside the mounting hole, and the top of the hollow sleeve (10) is fixedly connected to the crystallization kettle (1); The diversion barrel (5) is fixedly connected to the top of the crystallization kettle (1); The inner cavity of the diversion barrel (5) is fixedly connected to a diversion pipe (6) in a circumferential array, the lower end of the diversion pipe (6) is connected to the inner cavity of the crystallization kettle (1), and the lower end of the diversion pipe (6) is inclined outward and close to the upper periphery of the guide plate (11); The circulation pump (2) is installed on the top of the crystallization kettle (1), the suction end of the circulation pump (2) is connected to the inner cavity at the bottom of the crystallization kettle (1), and the output end of the circulation pump (2) is connected to the inner cavity of the diversion barrel (5).

2. The arsenic oxide cooling crystallization liquid inlet device according to claim 1, characterized in that: A drainage cone (12) is fixedly connected to the outer surface of the hollow sleeve (10).

3. The arsenic oxide cooling crystallization liquid inlet device according to claim 2, characterized in that: The outer periphery of the guide plate (11) is fixedly connected with guide strips (8) in a circumferential array.

4. The arsenic oxide cooling crystallization liquid inlet device according to claim 1, characterized in that: A motor (17) is installed on the top of the crystallization kettle (1), and a rotating shaft (13) is fixedly connected to the output end of the motor (17). The rotating shaft (13) is coaxially arranged with the hollow sleeve (10) and is rotatably connected to the hollow sleeve (10) via a bearing. A stirring shaft (15) is fixedly connected to the outer surface of the rotating shaft (13).

5. The arsenic oxide cooling crystallization liquid feeding device according to claim 4, characterized in that: The outer surface of the stirring shaft (15) is fixedly connected to a bifurcated rod (9) facing in different directions, the outer surface of the bifurcated rod (9) is rotatably connected to a rotating cylinder (16), and the outer surface of the rotating cylinder (16) is fixedly connected to an arc-shaped blade (4).

6. The arsenic oxide cooling crystallization liquid feeding device according to claim 5, characterized in that: A scraper (14) is fixedly connected to the end of the stirring shaft (15), and the scraper (14) is in contact with the inner wall of the crystallization kettle (1).

7. The liquid inlet device for cooling and crystallizing arsenic oxide according to claim 1, characterized in that: A refrigeration jacket (3) is fixedly arranged on the outer surface of the crystallization kettle (1).

8. The liquid inlet device for cooling and crystallizing arsenic oxide according to claim 1, characterized in that: The crystallization kettle (1) comprises a kettle body and an upper cover, wherein the kettle body and the upper cover are fixedly connected by bolts, and the circulation pump (2), the diversion barrel (5), the hollow sleeve (10) and the motor (17) are all fixed to the upper cover.

9. The liquid inlet device for cooling and crystallizing arsenic oxide according to claim 8, characterized in that: A feed pipe (7) is fixed inside the upper cover, and a discharge pipe is fixedly connected to the bottom of the crystallization kettle (1).

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