Rectification tank

Abstract

The rectification tank comprises a tank body, a driving motor and a heating pipe, a water inlet pipe is arranged on one side of the upper portion of the tank body, a discharging pipe is arranged in the middle of the lower end of the tank body, the driving motor is fixedly installed in the middle of the upper portion of the tank body, and a connecting shaft is fixed to the output end of the driving motor. Stirring rods are uniformly fixed to the surface of the connecting shaft, a scraping plate is fixed to the outer end of each stirring rod, a heating pipe is installed at the bottom of the tank body, an access door is rotationally connected to the upper surface of the tank body, an air guide pipe is installed on one side of the upper portion of the tank body, and a filtering assembly is connected to the upper portion of the air guide pipe; and an arc-shaped pipe is mounted above the filtering assembly. According to the rectification tank, impurities in gas can be filtered through the filter screen cylinder by using the filter assembly mounted between the gas guide pipe and the arc-shaped pipe, so that the influence of the impurities in the gas on the purity of rectification liquid is avoided, and the use effect of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to chemical polysilicon, in particular to a rectification tank. Background Art

[0002] Polycrystalline silicon is a form of elemental silicon. When molten elemental silicon solidifies under supercooling conditions, silicon atoms are arranged in a diamond lattice to form numerous crystal nuclei. If these nuclei grow into grains with different crystal plane orientations, these grains will combine and crystallize into polycrystalline silicon. During the polycrystalline silicon production process, the liquid containing elemental silicon needs to be distilled in advance through a distillation device to facilitate subsequent solidification and crystallization.

[0003] The existing publication number CN218529834U discloses a double-tower distillation device, which can effectively improve the distillation purity, including a first distillation tank, a mixed gas inlet pipe is provided in the middle of the first distillation tank, a liquid discharge pipe is provided at the bottom end of the first distillation tank, a first connecting pipe is provided at the top of the first distillation tank, a second distillation tank is provided at one end of the first connecting pipe, a second connecting pipe is provided at the bottom end of the second distillation tank, a condenser evaporator is provided between the first connecting pipe and the second connecting pipe, a gas discharge pipe is provided at the top of the second distillation tank, and a gas deflection device is provided inside the first distillation tank and the second distillation tank;

[0004] The above document can effectively increase the flow of gas inside the distillation tank by setting the gas baffle device, so that the gas to be liquefied contacts the top baffle, bottom baffle, top baffle, and bottom baffle, effectively improving the liquefaction effect, thereby effectively improving the distillation purity;

[0005] However, the distilled gas will contain impurities, and direct collection will lead to the problem of impure distillate. In addition, during distillation, crystals are likely to adhere to the surface of the distillation tank, affecting the discharge effect of the crystals. Therefore, we propose a distillation tank to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a distillation tank to solve the problems raised by the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a distillation tank comprising a tank body, a driving motor and a heating pipe, a water inlet pipe being provided on the upper side of the tank body, and a discharge pipe being provided on the lower middle part of the tank body, a driving motor being fixedly installed on the upper middle part of the tank body, and a connecting shaft being fixed on the output end of the driving motor, a stirring rod being evenly fixed on the surface of the connecting shaft, and a scraper being fixed on the outer end of the stirring rod, a heating pipe being installed on the bottom of the tank body, an inspection door being rotatably connected to the upper surface of the tank body, an air guide pipe being installed on the upper side of the tank body, a filter assembly being connected above the air guide pipe, and an arc pipe being installed above the filter assembly, a sleeve being connected below the arc pipe, and a condenser being provided inside the sleeve, and a drain pipe being connected below the sleeve.

[0008] Preferably, control valves are installed on the surfaces of the discharge pipe, the air guide pipe and the drain pipe.

[0009] Preferably, the stirring rods are arranged in five groups at equal angles on the surface of the connecting shaft, and the stirring rods and the scraper plates are distributed vertically.

[0010] Preferably, the outer end surface of the scraper plate on the surface of the stirring rod is arranged to fit the inner end surface of the tank body, and the bottom of the scraper plate is located above the heating tube.

[0011] Preferably, the filter assembly consists of a connecting pipe, a connecting head, a fastening bolt, a filter mesh cylinder and a sealing ring. The connecting pipe is arranged in a "U" shape, and the two ends of the connecting pipe are connected with a connecting head. A sealing ring is bonded to the inner surface of the connecting head, and a fastening bolt is installed on the surface of the connecting head. The filter mesh cylinder is installed inside the connecting pipe.

[0012] Preferably, the connectors at both ends of the connecting pipe are fixedly connected to the air guide pipe and the arc pipe by fastening bolts.

[0013] Preferably, the diameter of the end portion of the filter screen cylinder is equal to the inner tube diameter of the air guide tube and the arc tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the distillation tank,

[0015] The driving motor can drive the stirring rod on the surface of the connecting shaft to rotate, thereby accelerating the distillation rate of the device. At the same time, the use of the scraper plate at the end of the stirring rod can facilitate the scraping of the crystals flowing down the distillation tank, thereby improving the cleanliness of the discharge of the device.

[0016] By using the filter assembly installed between the air guide pipe and the arc tube, impurities in the gas can be filtered through the filter cylinder, thereby preventing the impurities in the gas from affecting the purity of the distillate and improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a rear view structural diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the top cross-sectional structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the filter component of the utility model.

[0022] In the figure: 1. Tank body; 2. Water inlet pipe; 3. Discharge pipe; 4. Drive motor; 5. Connecting shaft; 6. Agitating rod; 7. Scraper; 8. Heating pipe; 9. Inspection door; 10. Air duct; 11. Filter assembly; 1101. Connecting pipe; 1102. Connecting head; 1103. Fastening bolt; 1104. Filter screen; 1105. Sealing ring; 12. Arc pipe; 13. Sleeve; 14. Condenser; 15. Drain pipe; 16. Control valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The utility model provides a technical solution: a distillation tank, including a tank body 1, a driving motor 4 and a heating pipe 8. A water inlet pipe 2 is provided on one side of the upper side of the tank body 1, and a discharge pipe 3 is provided in the middle part of the lower end of the tank body 1. The driving motor 4 is fixedly installed in the middle part of the upper part of the tank body 1, and the output end of the driving motor 4 is fixed with a connecting shaft 5. A stirring rod 6 is evenly fixed on the surface of the connecting shaft 5, and a scraper plate 7 is fixed on the outer end of the stirring rod 6. The stirring rod 6 is provided with five groups at equal angles on the surface of the connecting shaft 5, and the stirring rod 6 and the scraper plate 7 are distributed vertically. The stirring rod 6 can be used to accelerate the internal distillation speed by using the stirring rod 6 evenly distributed on the surface of the connecting shaft 5. The outer end surface of the scraper plate 7 on the surface of the stirring rod 6 is fitted with the inner end surface of the tank body 1, and the bottom of the scraper plate 7 is located above the heating pipe 8. The scraper plate 7 at the end of the stirring rod 6 can be used to facilitate the scraping of crystals on the inner surface of the tank body 1.

[0025] See also Figure 1-5, a heating pipe 8 is installed at the bottom of the tank body 1, and an inspection door 9 is rotatably connected to the upper surface of the tank body 1. An air guide pipe 10 is installed on one side of the upper part of the tank body 1. A filter assembly 11 is connected to the upper part of the air guide pipe 10, and an arc tube 12 is installed above the filter assembly 11. The filter assembly 11 is composed of a connecting pipe 1101, a connecting head 1102, a fastening bolt 1103, a filter cylinder 1104 and a sealing ring 1105. The connecting pipe 1101 is arranged in a "U" shape, and the two ends of the connecting pipe 1101 are connected and provided with a connecting head 1102. The inner surface of the connecting head 1102 is bonded with a sealing ring 1105, and the surface of the connecting head 1102 is installed with a fastening bolt 1103. A filter cylinder 1104 is installed inside the connecting pipe 1101, which is convenient for filtering impurities in the gas through the filter cylinder 1104 inside the connecting pipe 1101 to avoid impurities. The quality affects the purity of the distillate. The connectors 1102 at both ends of the connecting pipe 1101 are fixedly connected to the air guide pipe 10 and the arc pipe 12 by fastening bolts 1103, which facilitates the installation and disassembly between the connecting pipe 1101 and the air guide pipe 10. The end diameter of the filter mesh cylinder 1104 is equal to the inner tube diameter of the air guide pipe 10 and the arc pipe 12, which can facilitate the docking of the filter mesh cylinder 1104 with the air guide pipe 10, facilitate the inflow of gas, and also facilitate the discharge of the filter mesh cylinder 1104 from the connecting pipe 1101. A sleeve 13 is connected to the bottom of the arc pipe 12, and a condenser 14 is provided inside the sleeve 13. A drain pipe 15 is provided below the sleeve 13. Control valves 16 are installed on the surfaces of the discharge pipe 3, the air guide pipe 10 and the drain pipe 15, which facilitates the flow control of liquid and gas in the discharge pipe 3, the air guide pipe 10 and the drain pipe 15 through the control valve 16.

[0026] Working principle: First, when in use, by turning on the heating tube 8 and the drive motor 4 inside the tank body 1, the heating tube 8 heats and distills the liquid inside, and at the same time cooperates with the drive motor 4 to drive the stirring rod 6 on the surface of the connecting shaft 5 to rotate, so that the stirring rod 6 accelerates the distillation rate of the internal liquid. The end of the stirring rod 6 is fixed with a scraper plate 7 attached to the inner surface of the tank body 1. As the connecting shaft 5 rotates, the scraper plate 7 can scrape off the crystals produced by distillation on the inner wall of the tank body 1 to facilitate the discharge of the crystals, thereby improving the crystal discharge effect of the device.

[0027] The distilled gas will be discharged through the air duct 10, the arc tube 12, the condenser 14 and the drain pipe 15, and a filter assembly 11 is installed between the air duct 10 and the arc tube 12. The filter mesh cylinder 1104 inside the connecting tube 1101 on the filter assembly 11 can be used to filter and remove impurities from the passing gas, thereby preventing impurities in the gas from affecting the purity of the distillate. The connectors 1102 at both ends of the connecting tube 1101 are connected to the air duct 10 by fastening bolts 1103, and the end diameter of the filter mesh cylinder 1104 is equal to the inner tube diameter of the air duct 10, so that the filter mesh cylinder 1104 can be removed and cleaned. This is the operating principle of the distillation tank.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A distillation tank, comprising a tank body (1), a drive motor (4) and a heating tube (8), characterized in that: A water inlet pipe (2) is provided on one side of the upper part of the tank body (1), and a discharge pipe (3) is provided in the middle of the lower end of the tank body (1). A driving motor (4) is fixedly installed in the middle of the upper part of the tank body (1), and a connecting shaft (5) is fixed to the output end of the driving motor (4). A stirring rod (6) is evenly fixed on the surface of the connecting shaft (5), and a scraper plate (7) is fixed to the outer end of the stirring rod (6). A heating pipe (8) is installed at the bottom of the tank body (1). An inspection door (9) is rotatably connected to the upper surface of the tank body (1). An air guide pipe (10) is installed on one side of the upper part of the tank body (1). A filter assembly (11) is connected to the upper part of the air guide pipe (10), and an arc tube (12) is installed above the filter assembly (11). A sleeve (13) is connected to the lower part of the sleeve (13), and a condensation pipe (14) is provided inside the sleeve (13). A drain pipe (15) is provided below the sleeve (13).

2. A distillation tank according to claim 1, characterized in that: Control valves (16) are installed on the surfaces of the discharge pipe (3), the air guide pipe (10) and the drain pipe (15).

3. A distillation tank according to claim 1, characterized in that: The stirring rods (6) are arranged in five groups at equal angles on the surface of the connecting shaft (5), and the stirring rods (6) and the scraper plates (7) are vertically distributed.

4. A distillation tank according to claim 1, characterized in that: The outer end surface of the scraper plate (7) on the surface of the stirring rod (6) is arranged to fit the inner end surface of the tank body (1), and the bottom of the scraper plate (7) is located above the heating tube (8).

5. A distillation tank according to any one of claims 1 to 4, characterized in that: The filter assembly (11) is composed of a connecting pipe (1101), a connecting head (1102), a fastening bolt (1103), a filter screen cartridge (1104) and a sealing ring (1105). The connecting pipe (1101) is arranged in a "U" shape, and the two ends of the connecting pipe (1101) are connected and provided with connecting heads (1102). The inner surface of the connecting head (1102) is bonded with a sealing ring (1105), and the surface of the connecting head (1102) is installed with fastening bolts (1103). The filter screen cartridge (1104) is installed inside the connecting pipe (1101).

6. A distillation tank according to claim 5, characterized in that: The connectors (1102) at both ends of the connecting tube (1101) are fixedly connected to the air guide tube (10) and the arc tube (12) via fastening bolts (1103).

7. A distillation tank according to claim 5, characterized in that: The diameter of the end of the filter screen cylinder (1104) is equal to the inner diameter of the air guide tube (10) and the arc tube (12).

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