Multi-stage evaporative crystallization device for recycling boric acid

Abstract

The utility model discloses a multi-section evaporative crystallization device for boric acid recovery, which belongs to the technical field of boric acid water return and comprises a base. An evaporation tank is fixedly connected to one end of the base, a liquid inlet is formed in the top end of the evaporation tank, a discharge pipe is arranged at the bottom end of the evaporation tank, and an electric motor is arranged on the outer surface of the discharge pipe; an output shaft of the electric motor is in key connection with a supporting rod, the supporting rod is rotationally connected with the inner side wall of the discharging pipe through a rotating shaft, a stirring rod is arranged on the outer surface of the supporting rod, a stepping motor is arranged on the upper surface of the evaporating tank, an output shaft of the stepping motor is in key connection with a fixing rod, and the fixing rod is rotationally connected with the inner side wall of the evaporating tank through a rotating shaft. The bottom end of the fixing rod penetrates through the evaporation tank and is provided with a stirring structure, an evaporator is arranged in an inner cavity of the evaporation tank, and an evaporation mechanism is arranged at the other end of the base, so that the evaporation efficiency of the evaporative crystallization device can be improved, boric acid crystals are prevented from being accumulated at a discharging opening during discharging, and the discharging efficiency of the evaporative crystallization device is improved.

Description

Technical Field

[0001] This utility model relates to the field of boric acid recovery technology, specifically a multi-stage evaporation and crystallization device for boric acid recovery. Background Technology

[0002] Boric acid is an inorganic compound with the chemical formula H3BO3. It is a white crystalline powder with a slippery feel and no odor. It is widely used in the glass industry to improve the heat resistance and transparency of glass products, increase mechanical strength, and shorten melting time. It can also be used as a preservative and disinfectant. During the production of boric acid, some substandard boric acid solutions may be produced. To avoid wasting resources, boric acid solutions are usually recycled.

[0003] Current boric acid recovery methods typically involve placing the filtered boric acid solution in a multi-stage evaporator. The evaporator evaporates excess water vapor, producing boric acid crystals. However, since the evaporator generally uses an evaporator to evaporate the boric acid solution, and only one set of evaporation components is used for evaporation, the evaporator's evaporation efficiency is low. In addition, boric acid crystals tend to accumulate at the discharge port of the evaporator during feeding, causing blockages. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage evaporation and crystallization device for boric acid recovery, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage evaporation and crystallization device for boric acid recovery, including a base;

[0006] An evaporator is fixedly connected to one end of the base. An inlet is provided at the top of the evaporator, and a discharge pipe is provided at the bottom of the evaporator. An electric motor is provided on the outer surface of the discharge pipe.

[0007] The output shaft of the electric motor is keyed to a support rod, which is rotatably connected to the inner wall of the discharge pipe via a rotating shaft. A stirring rod is provided on the outer surface of the support rod, and a stepper motor is provided on the upper surface of the evaporator. A fixing rod is keyed to the output shaft of the stepper motor.

[0008] The fixing rod is rotatably connected to the inner wall of the evaporator via a rotating shaft. The bottom end of the fixing rod penetrates the evaporator and is equipped with a stirring structure for stirring the boric acid solution. An evaporator is provided in the inner cavity of the evaporator, and an evaporation mechanism is provided at the other end of the base for cooperating with the multi-stage evaporation of the boric acid solution.

[0009] In one embodiment, the stirring structure includes a rotating seat, the top end of which is fixedly connected to the bottom end of a fixed rod, and a rotating rod is rotatably connected to the bottom end of the rotating seat via a rotating shaft. The outer surface of the rotating rod is provided with stirring blades.

[0010] In one embodiment, a scraper is fixedly connected to the lower surface of the rotating seat. The scraper is arranged at an angle, and there are two sets of scrapers, which are symmetrically distributed on the lower surface of the rotating seat.

[0011] In one embodiment, the evaporation mechanism includes an evaporation chamber fixedly connected to the top of the base. One end of the evaporation chamber is provided with an evaporation heat exchanger. The air inlet of the evaporation heat exchanger is connected to an air inlet pipe. The other end of the air inlet pipe is connected to the inner cavity of the evaporation tank. The heat exchange port of the evaporation heat exchanger is connected to a heat exchange tube. The other end of the heat exchange tube is connected to the evaporation chamber. The other end of the evaporation chamber is provided with an air supply assembly. The other end of the air supply assembly is connected to the inner cavity of the evaporation tank.

[0012] In one embodiment, the inner cavity of the evaporator is provided with evaporating elements, and two sets of evaporating elements are provided, with the two sets of evaporating elements symmetrically arranged in the inner cavity of the evaporator.

[0013] In one embodiment, the gas supply assembly includes a steam compressor, the steam compressor's exhaust port being connected to an exhaust pipe, one end of the exhaust pipe being connected to the inner cavity of an evaporator, the steam compressor's exhaust port being connected to an exhaust pipe, the other end of the exhaust pipe being connected to the inner cavity of an evaporator, the steam compressor's gas supply port being connected to a gas supply pipe, and the other end of the gas supply pipe being connected to the inner cavity of an evaporator.

[0014] In one embodiment, the stirring rod is provided in several groups, and the several groups of stirring rods are distributed around the center on the outer surface of the support rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention provides a multi-stage evaporation crystallization device for boric acid recovery. During evaporation, the evaporator is activated to evaporate the boric acid solution in the evaporation tank. Then, the vapor generated by evaporation is extracted by the evaporation mechanism, heated, and sent back into the evaporation tank for further heating and evaporation, thus achieving multi-stage evaporation. Through the cooperation of an electric motor and a rotating rod, the rotating rod drives the stirring rod to rotate, which in turn stirs the material accumulated in the discharge pipe, thereby improving the evaporation efficiency of the evaporation crystallization device and preventing boric acid crystals from accumulating at the discharge port, thus improving the discharge efficiency of the evaporation crystallization device.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the evaporator of this utility model;

[0021] Figure 4 This is a schematic diagram of a partial cross-section of the discharge pipe of this utility model;

[0022] Figure 5 This is a schematic diagram of a partial cross-section of the evaporator of this utility model;

[0023] Figure 6 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0024] In the picture:

[0025] 1. Base;

[0026] 2. Evaporator;

[0027] 3. Liquid inlet;

[0028] 4. Discharge pipe;

[0029] 5. Electric motor;

[0030] 6. Support rod;

[0031] 7. Stirring rod;

[0032] 8. Stepper motor;

[0033] 9. Fixing rod;

[0034] 10. Stirring structure; 101. Rotating seat; 102. Rotating rod; 103. Stirring blades;

[0035] 11. Evaporator;

[0036] 12. Evaporation mechanism; 121. Evaporation chamber; 122. Evaporative heat exchanger; 123. Inlet pipe; 124. Heat exchange tube; 125. Steam compressor; 126. Extraction pipe; 127. Supply pipe;

[0037] 13. Scraper;

[0038] 14. Evaporator components. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see Figure 1-5 This utility model provides a technical solution: a multi-stage evaporation and crystallization device for boric acid recovery, including a base 1; an evaporator 2 is fixedly connected to one end of the base 1, an inlet 3 is provided at the top of the evaporator 2, a discharge pipe 4 is provided at the bottom of the evaporator 2, and an electric motor 5 is provided on the outer surface of the discharge pipe 4; a support rod 6 is keyed to the output shaft of the electric motor 5, the support rod 6 is rotatably connected to the inner wall of the discharge pipe 4 through a rotating shaft, a stirring rod 7 is provided on the outer surface of the support rod 6, a stepper motor 8 is provided on the upper surface of the evaporator 2, a fixing rod 9 is keyed to the output shaft of the stepper motor 8, the fixing rod 9 is rotatably connected to the inner wall of the evaporator 2 through a rotating shaft, the bottom end of the fixing rod 9 penetrates the evaporator 2 and is provided with a stirring structure 10 for stirring the boric acid solution, an evaporator 11 is provided in the inner cavity of the evaporator 2, and an evaporation mechanism 12 for cooperating with multi-stage evaporation of the boric acid solution is provided at the other end of the base 1;

[0041] The boric acid solution is poured into the evaporator 2 through the inlet 3. The evaporator 11 is started to heat and evaporate the solution. At the same time, the stepper motor 8 is started to drive the fixed rod 9 to rotate, so that the stirring mechanism at the bottom of the fixed rod 9 stirs the boric acid solution. When steam is generated in the evaporator 2, the steam is extracted through the evaporation mechanism 12 for heating, and then the heated steam is sent into the evaporator 2 to cooperate in evaporation and heating, realizing multi-stage heating. During discharge, the boric acid crystals are discharged through the discharge pipe 4. The drive motor is started to drive the stirring rod 7 to rotate through the support rod 6 to stir and disperse the boric acid crystals accumulated in the discharge pipe 4, thereby improving the evaporation efficiency of the evaporation crystallization device and avoiding the accumulation of boric acid crystals at the discharge port during discharge, thus improving the discharge efficiency of the evaporation crystallization device.

[0042] Optionally, the stirring structure 10 includes a rotating seat 101, the top end of which is fixedly connected to the bottom end of the fixed rod 9. The bottom end of the rotating seat 101 is rotatably connected to a rotating rod 102 via a rotating shaft. The outer surface of the rotating rod 102 is provided with stirring blades 103. The rotating seat 101 drives the rotating rod 102 to rotate, thereby causing the rotating rod 102 to drive the stirring blades 103 to rotate and stir the boric acid solution.

[0043] In one embodiment, a scraper 13 is fixedly connected to the lower surface of the rotating seat 101. The scraper 13 is arranged in an inclined manner. There are two sets of scrapers 13, which are symmetrically distributed on the lower surface of the rotating seat 101. The rotation of the rotating seat 101 can drive the scraper 13 to rotate, and the boric acid crystals adhering to the inner wall of the evaporator 2 are scraped off by the scraper 13.

[0044] In one embodiment, the evaporation mechanism 12 includes an evaporation chamber 121, which is fixedly connected to the top of the base 1. One end of the evaporation chamber 121 is provided with an evaporation heat exchanger 122. The air inlet of the evaporation heat exchanger 122 is connected to an air inlet pipe 123. The other end of the air inlet pipe 123 is connected to the inner cavity of the evaporation tank 2. The heat exchange port of the evaporation heat exchanger 122 is connected to a heat exchange pipe 124. The other end of the heat exchange pipe 124 is connected to the evaporation chamber 121. The other end of the evaporation chamber 121 is provided with a gas supply assembly. The other end of the gas supply assembly is connected to the inner cavity of the evaporation tank 2. The steam in the evaporation tank 2 enters the inner cavity of the evaporation heat exchanger 122 through the air inlet pipe 123. After being heated by the evaporation heat exchanger 122, the heated steam is sent into the evaporation chamber 121 through the heat exchange pipe 124. After being heated again by the evaporation chamber 121, the steam is sent into the evaporation tank 2 through the gas supply assembly for evaporation.

[0045] In one embodiment, the inner cavity of the evaporator 121 is provided with an evaporator 14, and two sets of evaporators 14 are provided. The two sets of evaporators 14 are symmetrically arranged in the inner cavity of the evaporator 121. The evaporator 14 is activated to heat the inside of the evaporator 121, thereby raising the temperature of the steam inside the evaporator 121.

[0046] In one embodiment, the gas supply assembly includes a steam compressor 125. The suction port of the steam compressor 125 is connected to a suction pipe 126. One end of the suction pipe 126 is connected to the inner cavity of the evaporator 121. The suction port of the steam compressor 125 is connected to the suction pipe 126. The other end of the suction pipe 126 is connected to the inner cavity of the evaporator 121. The gas supply port of the steam compressor 125 is connected to a gas supply pipe 127. The other end of the gas supply pipe 127 is connected to the inner cavity of the evaporator 2. When the steam compressor 125 is started, the steam in the evaporator 121 is extracted through the suction pipe 126. Then, the heated steam is sent into the evaporator 2 through the gas supply pipe 127 for auxiliary heating.

[0047] In one embodiment, several sets of stirring rods 7 are provided, and the several sets of stirring rods 7 are distributed around the center on the outer surface of the support rod 6. By setting the stirring rods 7, the efficiency of the stirring rods 7 in breaking up boric acid crystals is improved.

[0048] In practical use: Boric acid solution is poured into evaporator 2 through inlet 3. Evaporator 11 is started to heat and evaporate the solution. Simultaneously, stepper motor 8 is started to rotate fixed rod 9, causing fixed rod 9 to rotate through rotating seat 101, which in turn drives rotating rod 102 to rotate. Rotating rod 102 then drives stirring blade 103 to stir the boric acid solution. When steam is generated, it enters the inner cavity of evaporator heat exchanger 122 through inlet pipe 123. After heating, evaporator heat exchanger 122 sends the heated steam into evaporator box 121 through heat exchange tube 124. Evaporator 121 is reheated, and then steam compressor 125 is started to extract steam from evaporator 121 through suction pipe 126. The heated steam is then sent into evaporator 2 through gas supply pipe 127 for auxiliary heating. During discharge, discharge pipe 4 is opened and drive motor is started to drive stirring rod 7 to rotate through support rod 6 to stir and disperse the boric acid crystals accumulated in discharge pipe 4, thereby improving the evaporation efficiency of evaporation crystallization device and preventing boric acid crystals from accumulating at the discharge port during discharge, thus improving the discharge efficiency of evaporation crystallization device.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage evaporation crystallization device for boron acid recovery, comprising a base (1), characterized in that: one end of the base (1) is fixedly connected with an evaporation tank (2), the top end of the evaporation tank (2) is provided with a liquid inlet (3), the bottom end of the evaporation tank (2) is provided with a discharge pipe (4), the outer surface of the discharge pipe (4) is provided with an electric motor (5); the output shaft of the electric motor (5) is key connected with a support rod (6), the support rod (6) is rotatably connected with the inner side wall of the discharge pipe (4) through a rotating shaft, the outer surface of the support rod (6) is provided with a stirring rod (7), the upper surface of the evaporation tank (2) is provided with a stepping motor (8), the output shaft of the stepping motor (8) is key connected with a fixed rod (9), the fixed rod (9) is rotatably connected with the inner side wall of the evaporation tank (2) through a rotating shaft; the bottom end of the fixed rod (9) penetrates through the evaporation tank (2) and is provided with a stirring structure (10) for stirring boron acid liquid, the inner cavity of the evaporation tank (2) is provided with an evaporator (11), the other end of the base (1) is provided with an evaporation mechanism (12) for multi-stage evaporation of boron acid liquid.

2. The multi-stage evaporation crystallization device for boron acid recovery according to claim 1, characterized in that: the stirring structure (10) comprises a rotating seat (101), the top end of the rotating seat (101) is fixedly connected with the bottom end of the fixed rod (9), the bottom end of the rotating seat (101) is rotatably connected with a rotating rod (102) through a rotating shaft, the outer surface of the rotating rod (102) is provided with stirring blades (103).

3. The multi-stage evaporation crystallization device for boron acid recovery according to claim 2, characterized in that: the lower surface of the rotating seat (101) is fixedly connected with a scraper (13), the scraper (13) is arranged in an inclined manner.

4. The multi-stage evaporation crystallization device for boron acid recovery according to claim 1, characterized in that: the evaporation mechanism (12) comprises an evaporation box (121), the evaporation box (121) is fixedly connected with the top end of the base (1), one end of the evaporation box (121) is provided with an evaporation heat exchanger (122); the gas inlet of the evaporation heat exchanger (122) is communicated with a gas inlet pipe (123), the other end of the gas inlet pipe (123) is communicated with the inner cavity of the evaporation tank (2); the heat exchange port of the evaporation heat exchanger (122) is communicated with a heat exchange pipe (124), the other end of the heat exchange pipe (124) is communicated with the evaporation box (121), the other end of the evaporation box (121) is provided with a gas feeding assembly, the other end of the gas feeding assembly is communicated with the inner cavity of the evaporation tank (2).

5. The multi-stage evaporation crystallization device for boron acid recovery according to claim 4, characterized in that: the inner cavity of the evaporation box (121) is provided with evaporation pieces (14), the evaporation pieces (14) are provided in two groups, the two groups of evaporation pieces (14) are symmetrically arranged in the inner cavity of the evaporation box (121). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The multi-stage evaporation crystallization device for boron acid recovery according to claim 4, characterized in that: The air feeding assembly comprises a vapor compressor (125), the air suction pipe (126) is communicated with the air suction port of the vapor compressor (125), one end of the air suction pipe (126) is communicated with the inner cavity of the evaporation box (121); The air suction pipe (126) is communicated with the air suction port of the vapor compressor (125), the other end of the air suction pipe (126) is communicated with the inner cavity of the evaporation box (121), the air feeding pipe (127) is communicated with the air feeding port of the vapor compressor (125), and the other end of the air feeding pipe (127) is communicated with the inner cavity of the evaporation tank (2).

7. The multi-stage evaporation crystallization device for boron acid recovery according to claim 1, characterized in that: The stirring rods (7) are provided in multiple groups, and the multiple groups of stirring rods (7) are distributed around the center of the support rods (6) on the outer surfaces of the support rods (6).

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