Device and method for purifying boron-10 acid crude product solution

Abstract

The invention discloses a boron-acid crude product solution purifying device which comprises a placing frame, a heating and dissolving assembly is installed at the top of the placing frame, the output end of the heating and dissolving assembly is connected with a low-temperature crystallization assembly, a water storage tank is formed in the middle of a cooling cylinder, and a crystallization cylinder is fixed to the inner side of the water storage tank; according to the invention, a purifying agent and a boric acid crude product solution are added through the liquid adding funnel, are heated and dissolved and then are conveyed to the crystallization cylinder, and cold water is stored through the cooling cylinder for cooling crystallization and impurity separation; and then the crystallization barrel is driven by the electric telescopic rod to be opened, crystals can be quickly cleaned, so that solid-liquid separation is quick, solid crystals are convenient to clean, the filtered liquid flows back to the heating barrel again and can be circularly purified, and a boric acid solution with higher purity is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of boric acid purification, and in particular to a device and method for purifying a crude boric acid 10 solution. Background Art

[0002] Boric acid is an inorganic compound with the chemical formula H3BO3. It is a white crystalline powder with a smooth feel and no odor. Natural boron has two stable isotopes, namely B-10 and B-11. B-10 has the unique characteristic of high absorption of neutrons. The absorption cross section of B-10 for thermal neutrons is 3837 bar (1b = 10, Pa). Boron-10 isotope is a highly efficient thermal neutron absorber. Therefore, it is indispensable in the safety and control system of nuclear power plants. Special grade (SQ) boric acid is used in the nuclear industry and has the characteristic of high proportion of boron-10, which makes the related products of B-10 isotope widely used. The related product of B-10 isotope, boric acid, will be doped with more impurities during the production process and needs to be purified many times.

[0003] However, in the current purification device for crude boric acid 10 solution, when purifying crystals, it is difficult to separate the solid and liquid in the crystallization container, the container is troublesome to open, and the treatment of the internal crystals is time-consuming. Summary of the invention

[0004] The present invention provides a device and method for purifying a crude boric acid 10 solution, which can effectively solve the problems in the prior art that, during purification and crystallization, solid-liquid separation in a crystallization container is difficult, the container is troublesome to open, and the treatment of internal crystals is time-consuming.

[0005] To achieve the above object, the present invention provides the following technical solution: a boric acid crude solution purification device, comprising a placement rack, a heating and dissolving component is installed on the top of the placement rack, and a low-temperature crystallization component is connected to the output end of the heating and dissolving component;

[0006] The low-temperature crystallization assembly includes a cooling cylinder, a water storage tank, a crystallization cylinder, a water inlet pipe, a drain pipe, a clamping cylinder, a water injection vertical cylinder, a support plate, an electric telescopic rod, a connecting rod, a filter pipe, a liquid discharge short pipe, a second solenoid valve, a collecting cylinder, a water pump and a reflux pipe;

[0007] A water storage tank is provided in the middle of the cooling cylinder, a crystallization cylinder is fixed on the inner side of the water storage tank, a water inlet pipe is embedded and installed on the top of the cooling cylinder, a drain pipe is embedded and installed at the position of the top of the cooling cylinder corresponding to the water inlet pipe, a clamping cylinder is clamped inside the crystallization cylinder, a water injection vertical cylinder is embedded and installed on the top of the clamping cylinder, a support plate is installed on one side of the cooling cylinder, an electric telescopic rod is installed on the top of the support plate, a connecting rod connected with the water injection vertical cylinder is installed on the top of the electric telescopic rod, a filter tube is fixed in the middle of the crystallization cylinder, a short drainage tube is connected to the bottom end of the filter tube, a second solenoid valve is installed on the bottom of the short drainage tube, a collecting cylinder is placed on the bottom of the cooling cylinder, a reflux pipe is embedded and installed on one side of the collecting cylinder, and a water pump connected with the reflux pipe is installed inside the collecting cylinder.

[0008] According to the above technical solution, the water inlet pipe is connected to an external water source, the drain pipe is connected to a water recovery device, and both the water inlet pipe and the drain pipe are connected to a water storage tank.

[0009] According to the above technical solution, the water pump, the second solenoid valve and the input end of the electric telescopic rod are all electrically connected to the output end of the external power supply;

[0010] The bottom end of the cooling cylinder is provided with supporting legs, which are placed on the ground.

[0011] According to the above technical solution, the opening of the clamping tube is downward, and a sealing ring is bonded at the opening of the clamping tube;

[0012] The water injection vertical cylinder is communicated with the clamping cylinder, and a connecting circular hole is opened at the top of the water injection vertical cylinder.

[0013] According to the above technical solution, the short drainage pipe passes through the cooling tube and the crystallization tube and is installed at the bottom end of the filtration tube. The top end of the filtration tube is sealed, and a plurality of filtration holes are opened in the middle of the filtration tube.

[0014] According to the above technical solution, the heating and dissolving assembly includes a support seat, a heating plate, a heating cylinder, a sealing cover, a driving motor, a stirring rod, a stirring blade, a liquid inlet hole, a liquid inlet tube, a first solenoid valve, a liquid adding funnel, a liquid infusion hole and a liquid infusion tube;

[0015] A support seat is installed at the top of the placement rack, a heating plate is installed inside the support seat, a heating tube is placed on the top of the heating plate, a sealing cover is clamped on the top of the heating tube, a driving motor is installed on the top of the sealing cover, a stirring rod is connected to the bottom of the driving motor, a stirring blade is connected to the bottom of the stirring rod, a liquid inlet hole is opened at the top of the sealing cover, a liquid inlet pipe is clamped inside the liquid inlet hole, a first solenoid valve is installed on the top of the liquid inlet pipe, a liquid adding funnel is connected to the top of the liquid inlet pipe, an infusion hole is opened at the top of the sealing cover, and an infusion pipe is clamped inside the infusion hole.

[0016] According to the above technical solution, the input ends of the heating plate, the driving motor and the first solenoid valve are all electrically connected to the output end of the external power supply;

[0017] One end of the reflux pipe is communicated with the bottom, the water inlet end of the infusion pipe is connected to a water pump, and one end of the water outlet end of the infusion pipe is clamped in the connecting circular hole at the top of the water injection vertical cylinder.

[0018] According to the above technical solution, a motor seat is fixed to the top of the sealing cover, and the driving motor is installed on the top of the sealing cover through the motor seat.

[0019] According to the above technical scheme, the following purification steps are included:

[0020] S1. First, add the crude boric acid solution from the addition funnel, transport it to the heating cylinder through the liquid inlet pipe, then add the purifying agent, and heat the heating cylinder through the heating plate to completely dissolve the purifying agent and the crude boric acid solution;

[0021] S2. The completely dissolved crude boric acid solution is transported into the crystallization cylinder through the infusion tube, and the external cold water is input into the water storage tank of the cooling cylinder through the water inlet pipe. The water after absorbing heat is discharged from the drain pipe to cool the crystallization cylinder, and the impurities in the crude boric acid solution are quickly cooled and crystallized;

[0022] S3. After the crude solution is crystallized, the second solenoid valve is opened, and the crystallized solution is filtered through the filter tube and then flows into the collecting tube through the short drainage tube. The connecting rod, the clamping tube and the water injection vertical tube are driven upward by the electric telescopic rod, and the crystallization tube is opened to clean the crystals inside. After the cleaning is completed, the clamping tube is driven downward by the electric telescopic rod to seal the crystallization tube;

[0023] S4, start the water pump, transport the filtered solution to the liquid inlet pipe again, enter the heating cylinder through the liquid inlet pipe, add the purifying agent again and heat to dissolve, continue to transport it to the crystallization cylinder, repeat the operations of steps S1-S3, and finally obtain the purified boric acid solution from the collection cylinder.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. By arranging a cooling cylinder, a water storage tank, a crystallization cylinder, a water inlet pipe, a drain pipe, a clamping cylinder, a support plate, an electric telescopic rod, a filter pipe, a collecting cylinder and a reflux pipe, the crude boric acid solution after heating and dissolving is transported to the crystallization cylinder through the infusion pipe, and cold water enters the water storage tank through the water inlet pipe, and the crude boric acid solution is quickly cooled and crystallized to separate solid impurities. The water after absorbing heat is discharged from the drain pipe, so that the crystallization cylinder can be continuously cooled to crystallize the crude boric acid solution, and can be better separated. Subsequently, the second solenoid valve is opened, and the crystallized solution is filtered from the filter pipe and flows into the collecting cylinder through the drainage short pipe, and is transported to the heating and dissolving component again through the reflux pipe, and then the water injection vertical cylinder is driven upward by the electric telescopic rod to open the crystallization cylinder, so that the internal crystals can be cleaned, and the operation is convenient and quick.

[0026] 2. By setting a heating plate, a heating cylinder, a liquid inlet hole, a liquid inlet pipe, a liquid adding funnel and a liquid infusion tube, the crude boric acid solution is added from the liquid adding funnel, the first solenoid valve is opened to connect the liquid inlet pipe, and the crude boric acid solution enters the heating cylinder through the liquid inlet pipe, and then the purifying agent is added, the heating cylinder is heated by the heating plate, the driving motor drives the stirring rod and the stirring blades to rotate, and the solution in the heating cylinder is stirred to completely dissolve the purifying agent and the crude boric acid solution, and the purified solution is received again, cyclically heated and dissolved, and the purification effect is better through repeated operations.

[0027] In summary, the purifying agent and the crude boric acid solution are added through the liquid adding funnel, heated and dissolved, and then transported to the crystallization cylinder. The cold water is stored in the cooling cylinder for cooling and crystallization, impurities are separated, and the remaining solution is filtered out. The crystallization cylinder is then opened by the electric telescopic rod, and the crystals can be quickly cleaned, so that the solid-liquid separation is fast and the solid crystals are cleaned conveniently. The filtered liquid is refluxed to the heating cylinder again, and can be circulated for purification, so as to obtain a higher purity boric acid solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0029] In the attached picture:

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 is a cross-sectional view of the heating tube of the present invention;

[0032] Figure 3 It is a schematic diagram of the installation of the stirring rod of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the liquid inlet pipe of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the filter tube of the present invention;

[0035] Figure 6 It is a purification method step diagram of the present invention;

[0036] Numbers in the figure: 1, placement rack;

[0037] 2. Heating and dissolving assembly; 201. Support seat; 202. Heating plate; 203. Heating cylinder; 204. Sealing cover; 205. Driving motor; 206. Stirring rod; 207. Stirring blade; 208. Liquid inlet hole; 209. Liquid inlet pipe; 210. First solenoid valve; 211. Liquid adding funnel; 212. Liquid infusion hole; 213. Liquid infusion pipe;

[0038] 3. Low-temperature crystallization assembly; 301. Cooling cylinder; 302. Water storage tank; 303. Crystallization cylinder; 304. Water inlet pipe; 305. Drain pipe; 306. Connecting cylinder; 307. Water injection vertical cylinder; 308. Support plate; 309. Electric telescopic rod; 310. Connecting rod; 311. Filter pipe; 312. Drain short pipe; 313. Second solenoid valve; 314. Collecting cylinder; 315. Water pump; 316. Reflux pipe. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0040] Example: Figure 1-5 As shown, the present invention provides a technical solution, a crude boric acid-10 solution purification device, comprising a placement rack 1, a heating and dissolving component 2 is installed on the top of the placement rack 1, and a low-temperature crystallization component 3 is connected to the output end of the heating and dissolving component 2;

[0041] The low temperature crystallization assembly 3 includes a cooling cylinder 301, a water storage tank 302, a crystallization cylinder 303, a water inlet pipe 304, a drain pipe 305, a clamping cylinder 306, a water injection vertical cylinder 307, a support plate 308, an electric telescopic rod 309, a connecting rod 310, a filter pipe 311, a liquid discharge short pipe 312, a second solenoid valve 313, a collection cylinder 314, a water pump 315 and a return pipe 316;

[0042] A water storage tank 302 is provided in the middle of the cooling cylinder 301, and a support leg is installed at the bottom of the cooling cylinder 301, and the support leg is placed on the ground to facilitate the placement of the cooling cylinder 301. A crystallization cylinder 303 is fixed on the inner side of the water storage tank 302, and a water inlet pipe 304 is embedded and installed on the top of the cooling cylinder 301. A drainage pipe 305 is embedded and installed at a position corresponding to the water inlet pipe 304 on the top of the cooling cylinder 301. The water inlet pipe 304 is connected to an external water source, and the drainage pipe 305 is connected to a water recovery device. The water inlet pipe 304 and the drainage pipe 305 are connected to the water recovery device. 5 are connected to the water storage tank 302, which is convenient for passing cold water to cool down and accelerate crystallization. The inside of the crystallization tube 303 is clamped with a clamping tube 306, the opening of the clamping tube 306 is downward, and a sealing ring is bonded at the opening position of the clamping tube 306 to make the clamping tube 306 and the crystallization tube 303 seal firmly. The top of the clamping tube 306 is embedded with a water injection vertical tube 307, which is connected to the clamping tube 306. The top of the water injection vertical tube 307 is provided with a connecting circular hole, which is convenient for connecting with the infusion tube 213 to receive the injection. A support plate 308 is installed on one side of the cooling cylinder 301, an electric telescopic rod 309 is installed on the top of the support plate 308, a connecting rod 310 connected to the water injection vertical cylinder 307 is installed on the top of the electric telescopic rod 309, a filter tube 311 is fixed in the middle of the crystallization cylinder 303, and a drainage short pipe 312 is connected to the bottom of the filter tube 311. The drainage short pipe 312 passes through the cooling cylinder 301 and the crystallization cylinder 303 and is installed at the bottom of the filter tube 311. The top of the filter tube 311 is sealed. A plurality of filter holes are provided in the middle of 1 to facilitate filtering out the upper solution after crystallization to obtain a boric acid solution with higher purity. A second solenoid valve 313 is installed at the bottom of the discharge short tube 312. A collecting tube 314 is placed at the bottom of the cooling tube 301. A reflux pipe 316 is embedded in one side of the collecting tube 314. A water pump 315 connected to the reflux pipe 316 is installed inside the collecting tube 314. The input ends of the water pump 315, the second solenoid valve 313 and the electric telescopic rod 309 are all electrically connected to the output end of the external power supply.

[0043] The heating and dissolving assembly 2 includes a support base 201, a heating plate 202, a heating cylinder 203, a sealing cover 204, a driving motor 205, a stirring rod 206, a stirring blade 207, a liquid inlet hole 208, a liquid inlet tube 209, a first solenoid valve 210, a liquid adding funnel 211, a liquid infusion hole 212 and a liquid infusion tube 213;

[0044] A support base 201 is installed at the top of the placement rack 1, a heating plate 202 is installed inside the support base 201, a heating cylinder 203 is placed on the top of the heating plate 202, a sealing cover 204 is clamped on the top of the heating cylinder 203, a driving motor 205 is installed on the top of the sealing cover 204, a motor base is fixed on the top of the sealing cover 204, the driving motor 205 is installed on the top of the sealing cover 204 through the motor base, the installation of the driving motor 205 is convenient, so that it can stably drive the stirring, the bottom end of the driving motor 205 is connected to a stirring rod 206, the bottom end of the stirring rod 206 is connected to a stirring blade 207, the top end of the sealing cover 204 is provided with a liquid inlet hole 208, the liquid inlet hole 20 8 has a liquid inlet pipe 209 clamped inside, a first solenoid valve 210 is installed on the top of the liquid inlet pipe 209, the input ends of the heating plate 202, the drive motor 205 and the first solenoid valve 210 are all electrically connected to the output end of the external power supply, the top of the liquid inlet pipe 209 is connected to a liquid adding funnel 211, the top of the sealing cover 204 is provided with an infusion hole 212, the inside of the infusion hole 212 is clamped with an infusion pipe 213, one end of the reflux pipe 316 is connected to the bottom, the water inlet end of the infusion pipe 213 is connected to a water pump 315, and one end of the water outlet end of the infusion pipe 213 is clamped in the connecting circular hole at the top of the water injection vertical cylinder 307, so as to facilitate the transportation of the crude boric acid solution after heating and dissolution.

[0045] like Figure 6 As shown, the purification steps include the following:

[0046] S1. First, the crude boric acid solution is added from the addition funnel 211, transported to the heating cylinder 203 through the liquid inlet pipe 209, and then the purifying agent is added, and the heating cylinder 203 is heated by the heating plate 202 to completely dissolve the purifying agent and the crude boric acid solution;

[0047] S2, the completely dissolved boric acid crude solution is transported into the crystallization cylinder 303 through the infusion tube 213, and the external cold water is input into the water storage tank 302 of the cooling cylinder 301 through the water inlet pipe 304, and the water after absorbing heat is discharged from the drain pipe 305, the crystallization cylinder 303 is cooled, and the impurities in the boric acid crude solution are quickly cooled and crystallized;

[0048] S3. After the crude solution is crystallized, the second solenoid valve 313 is opened, and the crystallized solution is filtered through the filter tube 311 and flows into the collecting tube 314 through the drainage short tube 312. The connecting rod 310, the clamping tube 306 and the water injection vertical tube 307 are driven upward by the electric telescopic rod 309, and the crystallization tube 303 is opened to clean the crystals inside. After the cleaning is completed, the clamping tube 306 is driven downward by the electric telescopic rod 309 to seal the crystallization tube 303.

[0049] S4, start the water pump 315, and transport the filtered solution to the liquid inlet pipe 209 again, and enter the heating cylinder 203 through the liquid inlet pipe 209, and heat and dissolve after adding the purifying agent again, and continue to transport it to the crystallization cylinder 303, and repeat the operations of steps S1-S3, and finally obtain the purified boric acid solution from the collection cylinder 314.

[0050] The working principle and use process of the present invention are as follows: first, a crude boric acid solution is added from a liquid adding funnel 211, and the first solenoid valve 210 is opened to connect the liquid inlet pipe 209, so that the crude boric acid solution enters the heating cylinder 203 through the liquid inlet pipe 209, and then a purifying agent is added, and the heating cylinder 203 is heated by the heating plate 202, and the driving motor 205 drives the stirring rod 206 and the stirring blade 207 to rotate, and the solution in the heating cylinder 203 is stirred to completely dissolve the purifying agent and the crude boric acid solution;

[0051] After the purification agent and the crude boric acid solution are completely dissolved, they are transported to the inside of the water injection vertical cylinder 307 through the infusion tube 213, and finally enter the inside of the crystallization cylinder 303. External cold water is input into the water storage tank 302 of the cooling cylinder 301 through the water inlet pipe 304 to cool the crystallization cylinder 303, so that the impurities in the crude boric acid solution are quickly cooled and crystallized, and the solid impurities are separated. As the water is continuously introduced, the water after absorbing heat is discharged from the drain pipe 305, so that the crystallization cylinder 303 can be continuously cooled, the crude boric acid solution can be crystallized, and the separation can be better performed;

[0052] After the crude solution is crystallized, the second solenoid valve 313 is opened, and the crystallized solution is filtered from the filtration tube 311 and flows into the collecting tube 314 through the drainage short tube 312, and then the second solenoid valve 313 is closed, and the connecting rod 310 is driven upward by the electric telescopic rod 309 to move the clamping tube 306 and the water injection vertical tube 307 upward, so that the crystallization tube 303 is opened, and the crystals inside can be cleaned. The operation is convenient and quick. After the cleaning is completed, the clamping tube 306 is driven downward by the electric telescopic rod 309 to seal the crystallization tube 303;

[0053] At this time, the water pump 315 is started again, and the filtered solution is transported to the liquid inlet pipe 209 again through the water pump 315 and the reflux tank 316, and enters the heating cylinder 203 through the liquid inlet pipe 209. After the purifying agent is added again, it is heated and dissolved, and then continued to be transported to the crystallization cylinder 303. The above operation is repeated to obtain a higher purity boric acid solution from the crude boric acid solution.

[0054] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. 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 replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for purifying a crude boric acid 10 solution, comprising a rack (1), Features: A heating and dissolving component (2) is installed on the top of the placement rack (1), and a low-temperature crystallization component (3) is connected to the output end of the heating and dissolving component (2); The low-temperature crystallization assembly (3) comprises a cooling cylinder (301), a water storage tank (302), a crystallization cylinder (303), a water inlet pipe (304), a drainage pipe (305), a clamping cylinder (306), a water injection vertical cylinder (307), a support plate (308), an electric telescopic rod (309), a connecting rod (310), a filter tube (311), a liquid discharge short pipe (312), a second solenoid valve (313), a collection cylinder (314), a water pump (315) and a return pipe (316); A water storage tank (302) is provided in the middle of the cooling cylinder (301), a crystallization cylinder (303) is fixed inside the water storage tank (302), a water inlet pipe (304) is embedded and installed at the top of the cooling cylinder (301), a drainage pipe (305) is embedded and installed at a position corresponding to the water inlet pipe (304) at the top of the cooling cylinder (301), a clamping cylinder (306) is clamped inside the crystallization cylinder (303), a water injection vertical cylinder (307) is embedded and installed at the top of the clamping cylinder (306), a support plate (308) is installed on one side of the cooling cylinder (301), and an electric telescopic Rod (309), a connecting rod (310) connected to the water injection vertical cylinder (307) is installed at the top of the electric telescopic rod (309), a filtering tube (311) is fixed in the middle of the crystallization cylinder (303), the bottom of the filtering tube (311) is connected to a short drainage tube (312), a second solenoid valve (313) is installed at the bottom of the short drainage tube (312), a collecting tube (314) is placed at the bottom of the cooling cylinder (301), a return pipe (316) is embedded in one side of the collecting tube (314), and a water pump (315) connected to the return pipe (316) is installed inside the collecting tube (314).

2. A crude boric acid solution purification device according to claim 1, It is characterized in that The water inlet pipe (304) is connected to an external water source, the water discharge pipe (305) is connected to a water recovery device, and both the water inlet pipe (304) and the water discharge pipe (305) are in communication with a water storage tank (302).

3. A crude boric acid solution purification device according to claim 1, It is characterized in that The input ends of the water pump (315), the second solenoid valve (313) and the electric telescopic rod (309) are all electrically connected to the output end of the external power supply; The bottom end of the cooling cylinder (301) is provided with a supporting leg, which is placed on the ground.

4. The device for purifying a crude boric acid solution according to claim 1, It is characterized in that The opening of the clamping tube (306) faces downward, and a sealing ring is bonded at the opening of the clamping tube (306); The water injection vertical cylinder (307) is communicated with the clamping cylinder (306), and a connecting circular hole is provided at the top of the water injection vertical cylinder (307).

5. The device for purifying a crude boric acid solution according to claim 1, It is characterized in that The short drain pipe (312) passes through the cooling tube (301) and the crystallization tube (303) and is installed at the bottom end of the filtration tube (311). The top end of the filtration tube (311) is sealed, and a plurality of filtration holes are opened in the middle of the filtration tube (311).

6. The device for purifying a crude boric acid solution according to claim 1, It is characterized in that The heating and dissolving component (2) comprises a support base (201), a heating plate (202), a heating cylinder (203), a sealing cover (204), a driving motor (205), a stirring rod (206), a stirring blade (207), a liquid inlet hole (208), a liquid inlet pipe (209), a first solenoid valve (210), a liquid adding funnel (211), a liquid infusion hole (212) and a liquid infusion pipe (213); A support seat (201) is installed at the top of the placement rack (1), a heating plate (202) is installed inside the support seat (201), a heating cylinder (203) is placed at the top of the heating plate (202), a sealing cover (204) is clamped at the top of the heating cylinder (203), a driving motor (205) is installed at the top of the sealing cover (204), a stirring rod (206) is connected to the bottom of the driving motor (205), and the bottom of the stirring rod (206) is connected to A stirring blade (207) is provided, a liquid inlet hole (208) is provided at the top of the sealing cover (204), a liquid inlet pipe (209) is clamped inside the liquid inlet hole (208), a first solenoid valve (210) is installed on the top of the liquid inlet pipe (209), a liquid adding funnel (211) is connected to the top of the liquid inlet pipe (209), a liquid infusion hole (212) is provided at the top of the sealing cover (204), and a liquid infusion pipe (213) is clamped inside the liquid infusion hole (212).

7. The device for purifying a crude boric acid solution according to claim 6, It is characterized in that The input ends of the heating plate (202), the driving motor (205) and the first solenoid valve (210) are all electrically connected to the output end of the external power supply; One end of the reflux pipe (316) is in communication with the bottom of the tank, the water inlet end of the liquid infusion pipe (213) is connected to a water pump (315), and one end of the water outlet end of the liquid infusion pipe (213) is clamped in the connecting circular hole at the top of the water injection vertical cylinder (307).

8. The device for purifying crude boric acid 10 solution according to claim 6, It is characterized in that A motor seat is fixed to the top of the sealing cover (204), and the driving motor (205) is installed on the top of the sealing cover (204) through the motor seat.

9. A method for purifying a crude boric acid solution according to any one of claims 1 to 8, It is characterized in that The method comprises the following purification steps: S1. First, a crude boric acid solution is added from a liquid addition funnel (211), and transported to a heating cylinder (203) through a liquid inlet pipe (209), and then a purifying agent is added, and the heating cylinder (203) is heated by a heating plate (202) to completely dissolve the purifying agent and the crude boric acid solution; S2, the completely dissolved crude boric acid solution is transported into the crystallization cylinder (303) through the infusion tube (213), and external cold water is input into the water storage tank (302) of the cooling cylinder (301) through the water inlet pipe (304), and the water after absorbing heat is discharged from the drain pipe (305), the crystallization cylinder (303) is cooled, and the impurities in the crude boric acid solution are quickly cooled and crystallized; S3. After the crude solution is crystallized, the second solenoid valve (313) is opened, and the crystallized solution is filtered through the filter tube (311) and then flows into the collecting tube (314) through the liquid discharge short tube (312). The connecting rod (310), the clamping tube (306) and the water injection vertical tube (307) are driven upward by the electric telescopic rod (309), and the crystallization tube (303) is opened to clean the crystals inside. After the cleaning is completed, the clamping tube (306) is driven downward by the electric telescopic rod (309) to seal the crystallization tube (303); S4, start the water pump (315), transport the filtered solution to the liquid inlet pipe (209) again, enter the heating cylinder (203) through the liquid inlet pipe (209), add the purifying agent again and heat to dissolve, continue to transport to the crystallization cylinder (303), repeat the steps S1-S3, and finally obtain the purified boric acid solution from the collection cylinder (314).

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