BHC single-stage continuous crystallizer

Abstract

The utility model discloses a BHC single-stage continuous crystallizer, which belongs to the technical field of BHC type processing equipment and comprises a crystallizer body, a vertical axial flow pump is mounted at the fixed bottom of the crystallizer body, a slurry barrel is fixedly mounted at the output end of the crystallizer body, and a stirring structure for fully and uniformly stirring is fixedly mounted in the slurry barrel. The inclined stirring rod is controlled by the driving motor to drive the stirring blades to rotate, so that raw materials in the slurry barrel are comprehensively stirred, the action range of the stirring blades is reduced, the stirring effect is guaranteed, solute in the raw materials is uniformly distributed, and the continuous crystallization processing quality of crystals is improved; the control rod drives the sliding block to move up and down while the stirring blades rotate along the sliding groove, so that the stirring process is more uniform, the problem of local non-uniform stirring is avoided, the contact area between a solution and the surface of a crystal is increased, crystal growth is accelerated, a scraper is arranged to prevent the crystal from depositing at the bottom or the wall surface of the crystallizer, and the production efficiency is improved. The dispersed state of the crystals is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of BHC type processing equipment, in particular to a BHC single-stage continuous crystallizer. Background Technique

[0002] A continuous crystallizer is a device that can realize continuous crystallization production, is suitable for continuous crystallization processes of various products, and has higher automation levels, production efficiencies, and production capacities.

[0003] During the BHC single-stage crystallization process, it is necessary to stir and blend the raw materials. In the existing technology, the stirring structure in the market is limited to the area directly affected by the stirring blades. For the raw material part far from the stirring blades, the stirring effect will weaken, which may lead to uneven distribution of solutes in the raw materials, thus affecting the quality of continuous crystal crystallization processing.

[0004] Content of the Utility Model

[0005] The purpose of the utility model is to provide a BHC single-stage continuous crystallizer to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] The BHC single-stage continuous crystallizer includes a crystallizer body. A vertical axial flow pump is installed at the fixed bottom of the crystallizer body. The output end of the crystallizer body is fixedly installed with a slurry tank. The output end of the slurry tank is fixedly connected with a centrifuge. The output end of the centrifuge is fixedly installed with a mother liquor tank. The output end of the mother liquor tank is fixedly installed with a first mother liquor pump. A second mother liquor pump and a discharge pump are respectively fixedly installed on one side of the crystallizer body. The output end at the top of the crystallizer body is fixedly installed with a condenser. The input end of the condenser is fixedly installed with a liquid ring vacuum unit. The output end of the condenser is fixedly installed with a condensate water tank. The output end of the condensate water tank is fixedly installed with a condensate water pump. A stirring structure for fully stirring and mixing evenly is fixedly installed inside the slurry tank;

[0008] The stirring structure includes a rotating shaft. A toothed disc is fixedly sleeved on the outer wall of the rotating shaft. A gear is meshed with the outer wall of the toothed disc. A stirring rod is fixedly installed inside the gear. The stirring rod is integrally set at an inclined angle for comprehensive stirring, and a stirring blade is rotatably sleeved on the outer wall of the stirring rod.

[0009] As a further scheme of the utility model, the number of the stirring blades is set in two groups, upper and lower, and each group is rotatably connected to the stirring rod through a rotating ring. A control rod for controlling the up and down movement of the stirring blade is fixedly installed at the bottom end of the lower rotating ring, and the control rod is slidably connected to the stirring rod.

[0010] As a further solution of the present utility model, a fixed shaft is fixedly installed at the bottom end of the stirring rod, and a scraping plate for scraping the solution deposited at the bottom of the slurry barrel is fixedly installed at the bottom end of the fixed shaft. The scraping plate is in contact with the inner wall of the slurry barrel. A driving motor for providing rotational power for the stirring structure is fixedly installed at the top of the slurry barrel, and the output end of the driving motor is fixedly connected to the top end of the rotating shaft.

[0011] As a further solution of the present utility model, the output end of the first mother liquor pump is fixedly connected to the input end of the crystallizer body. The first mother liquor pump transports the mother liquor inside the mother liquor barrel to the inside of the crystallizer body for continuous cyclic heat exchange and cooling crystallization.

[0012] As a further solution of the present utility model, the input end of the second mother liquor pump is connected to the upper clear mother liquor inside the crystallizer body for pumping out the upper clear mother liquor from the inside of the crystallizer body.

[0013] As a further solution of the present utility model, a steam input pipe and a steam output pipe are arranged on one side of the condenser. The output end of the steam input pipe is fixedly connected to a heat exchange box. The output end of the condensate water pump is fixedly connected to a return pipe. One end of the return pipe is fixedly installed on the surface of the heat exchange box. A water outlet pipe is arranged at the bottom of the heat exchange box. Heat exchange pipes are arranged inside the heat exchange box. The input end of the heat exchange pipe is fixedly connected to the output end of the return pipe. The output end of the heat exchange pipe is fixedly connected to an inlet pipe. The output end of the inlet pipe is fixedly connected to a heat preservation box. The output end of the heat preservation box is fixedly connected to a drain pipe. A drainage cover is arranged inside the heat exchange box. One side of the drainage cover is fixedly connected to the inner wall of the heat exchange box through a fixing rod. A limiting slider is fixedly connected to the inner wall of the drainage cover. An adjusting motor is fixedly connected to one side of the inner wall of the drainage cover. The output end of the adjusting motor is fixedly connected to an adjusting screw rod. An internal thread groove is arranged on the outer surface of the adjusting screw rod. The inner surface of the internal thread groove is threadedly connected to the surface of the adjusting screw rod. A telescopic cover is fixedly connected to one side of the connecting sleeve. A connecting cover is fixedly connected to one side of the telescopic cover. The outer surface of the connecting cover is slidably connected to the inner surface of the drainage cover. A connecting groove is arranged inside the connecting cover. The inner surface of the connecting groove is slidably connected to the surface of the limiting slider.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. When the utility model is in use, the driving motor controls the inclined stirring rod to drive the stirring blades to rotate, comprehensively stirring the raw materials inside the slurry barrel, increasing the action range of the stirring blades, ensuring the stirring effect, ensuring the uniform distribution of solutes in the raw materials, improving the quality of continuous crystal crystallization processing, and driving the sliding block along the chute by the control rod to move it up and down while the stirring blades rotate, making the stirring process more uniform, avoiding the problem of uneven stirring in local areas, enhancing the stirring effect, improving the stirring efficiency, increasing the contact area between the solution and the crystal surface, thereby accelerating crystal growth, and setting a scraper to prevent crystals from depositing at the bottom or on the wall of the crystallizer, maintaining the dispersed state of the crystals.

[0016] 2. When the utility model is in use, the material liquid concentrated by evaporation to saturation is continuously operated in the crystallizer under the low-temperature condition in a vacuum state, having the advantages of short crystallization cycle, large crystal size, high product purity, beautiful appearance, high crystallization ability, low energy consumption, etc., and is widely used in many industries such as food, medicine, deep processing of grains, beverages, light industry, environmental protection, chemical industry, etc. The vacuum cooling crystallizer can be designed into different models and different technological processes according to the characteristics of different materials to be processed, and can also be equipped with an automatic control system according to the requirements of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the stirring structure in the BHC single-stage continuous crystallizer.

[0018] Figure 2 It is the detail of the stirring structure in the BHC single-stage continuous crystallizer Figure 1 .

[0019] Figure 3 It is the detail of the stirring structure in the BHC single-stage continuous crystallizer Figure 2 .

[0020] Figure 4 It is the connection diagram of the condensate water tank and the heat exchange tank in the BHC single-stage continuous crystallizer.

[0021] Figure 5 It is Figure 4 the structural schematic diagram of the drainage cover part shown.

[0022] Figure 6 It is the overall flow chart of the BHC single-stage continuous crystallizer (prior art).

[0023] In the figure: 1. Crystallizer body; 2. Vertical axial flow pump; 3. Slurry tank; 4. Centrifugal separator; 5. Mother liquor tank; 6. First mother liquor pump; 7. Second mother liquor pump; 8. Discharge pump; 9. Condenser; 91. Steam inlet pipe; 92. Steam outlet pipe; 10. Liquid ring vacuum unit; 11. Condensate water tank; 12. Condensate water pump; 121. Return pipe; 13. Heat exchange tank; 131. Outlet pipe; 14. Heat exchange pipe; 141. Inlet pipe; 15. Insulation box; 151. Drain pipe; 16. Drainage cover; 161. Fixed rod; 162. Limit slider; 17. Adjusting motor; 171. Adjusting screw; 172. Connecting sleeve; 173. Internal thread groove; 18. Telescopic cover; 181. Connecting cover; 182. Connecting groove; 19. Stirring structure; 191. Rotating shaft; 192. Tooth disc; 193. Gear; 194. Stirring rod; 195. Stirring blade; 196. Connecting piece; 197. Rotating ring; 198. Control rod; 199. Sliding block; 1910. Chute; 1911. Connecting rod; 1912. Fixed shaft; 1913. Scraper; 1914. Driving motor. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] Embodiment 1: Please refer to Figure 1 - Figure 3 、 Figure 6 . The BHC single-stage continuous crystallizer includes a crystallizer body 1. A vertical axial flow pump 2 is fixedly installed at the fixed bottom of the crystallizer body 1. The output end of the crystallizer body 1 is fixedly installed with a slurry tank 3. The output end of the slurry tank 3 is fixedly connected with a centrifugal separator 4. The output end of the centrifugal separator 4 is fixedly installed with a mother liquor tank 5, and the input end of the mother liquor tank 5 is fixedly connected with one side of the output end of the slurry tank 3. The output end of the mother liquor tank 5 is fixedly installed with a first mother liquor pump 6. A second mother liquor pump 7 and a discharge pump 8 are respectively fixedly installed on one side of the crystallizer body 1, and both the second mother liquor pump 7 and the discharge pump 8 are fixedly connected with the output end of the crystallizer body 1. The output end at the top of the crystallizer body 1 is fixedly installed with a condenser 9. The input end of the condenser 9 is fixedly installed with a liquid ring vacuum unit 10. The output end of the condenser 9 is fixedly installed with a condensate water tank 11. The output end of the condensate water tank 11 is fixedly installed with a condensate water pump 12. A stirring structure 19 for fully stirring and mixing evenly is fixedly installed inside the slurry tank 3;

[0026] The stirring structure 19 includes a rotating shaft 191. A toothed disc 192 is fixedly sleeved on the outer wall of the rotating shaft 191. A gear 193 is meshed with the outer wall of the toothed disc 192. A stirring rod 194 is fixedly installed inside the gear 193. The stirring rod 194 is integrally set at an inclined angle for thorough stirring, and a stirring blade 195 is rotatably sleeved on the outer wall of the stirring rod 194;

[0027] Specifically, the rotating shaft 191 is rotatably inserted into the inside of the slurry barrel 3. The toothed disc 192 is set as a conical toothed disc 192 for easy meshing with the outer wall of the gear 193. A connecting piece 196 for fixing the position of the stirring rod 194 is fixedly sleeved at the bottom end of the rotating shaft 191, and the other end of the connecting piece 196 is fixedly sleeved with the stirring rod 194;

[0028] The number of the stirring blades 195 is set in two groups, upper and lower, and each group is rotatably connected to the stirring rod 194 through a rotating ring 197. A control rod 198 for controlling the up and down movement of the stirring blade 195 is fixedly installed at the bottom end of the lower rotating ring 197, and the control rod 198 is slidably connected to the stirring rod 194;

[0029] Specifically, a sliding block 199 is rotatably installed at the bottom end of the stirring rod 194. A sliding groove 1910 for providing movement for the sliding block 199 is opened on the outer wall of the bottom end of the stirring rod 194, and the sliding block 199 is located in the sliding groove 1910. The two groups of rotating rings 197 are fixedly connected through a connecting rod 1911;

[0030] More specifically, the stirring rod 194 drives the stirring blade 195 to rotate through frictional connection to stir the raw materials inside the slurry barrel 3. At the same time, the stirring blade 195 rotates asynchronously with the stirring rod 194 under the push of the stirred solution, and drives the control rod 198 to connect the sliding block 199 to move up and down along the sliding groove 1910, and drives the fixed shaft 1912 to connect the scraper 1913 to scrape the solution deposited at the bottom of the slurry barrel 3, making the stirring process more uniform, avoiding the problem of uneven stirring in local areas, enhancing the stirring effect, and improving the stirring efficiency;

[0031] A fixed shaft 1912 is fixedly installed at the bottom end of the stirring rod 194. A scraper 1913 for scraping the solution deposited at the bottom of the slurry barrel 3 is fixedly installed at the bottom end of the fixed shaft 1912, and the scraper 1913 is attached to the inner wall of the slurry barrel 3. A driving motor 1914 for providing rotational power for the stirring structure 19 is fixedly installed at the top of the slurry barrel 3, and the output end of the driving motor 1914 is fixedly connected to the top end of the rotating shaft 191.

[0032] Embodiment 2: Please refer to Figure 4 - Figure 6 , the input end of the crystallizer body 1 is connected to the raw liquid input port, and the raw liquid input port inputs the raw liquid into the inside of the crystallizer body 1 for heat exchange and cooling crystallization.

[0033] The output end of the discharge pump 8 is fixedly connected to the input end of the slurry barrel 3. The discharge pump 8 sends the original liquid after heat exchange, cooling and crystallization into the slurry barrel 3 for stirring, and then sends the stirred original liquid into the centrifuge 4 for centrifugation. The mother liquor obtained after centrifugation is put into the inner part of the mother liquor barrel 5;

[0034] The output end of the first mother liquor pump 6 is fixedly connected to the input end of the crystallizer body 1. The first mother liquor pump 6 transports the mother liquor inside the mother liquor barrel 5 into the inside of the crystallizer body 1 for continuous cyclic heat exchange, cooling and crystallization. A stirring mechanism is arranged inside the mother liquor barrel 5;

[0035] The input end of the second mother liquor pump 7 is connected to the upper clear mother liquor inside the crystallizer body 1, and is used to extract the upper clear mother liquor from the inside of the crystallizer body 1;

[0036] The condenser 9 recovers and condenses the steam generated inside the crystallizer body 1 to obtain condensed water. The condensed water is input into the inside of the condensate water tank 11, and then the condensate water is sent out through the condensate water pump 12;

[0037] The first mother liquor pump 6, the second mother liquor pump 7, the discharge pump 8, the liquid ring vacuum unit 10 and the condensate water pump 12 are all connected with circulating pump cooling water for cooling and heat dissipation.

[0038] There is chilled water circulating inside the condenser 9 to help it exchange heat and condense the steam in the crystallizer.

[0039] The BHC type solution evaporated and concentrated to a concentration of 30% and a temperature of 80 °C continuously enters the crystallizer body 1. Part of the water is taken away by flashing to reduce the temperature to 48 °C. At the same time, BHC type crystals are initially crystallized. The solution containing a certain crystal slurry ratio continuously enters the cooling crystallizer and undergoes continuous heat exchange, cooling and crystallization to obtain large-grained BHC type crystal slurry. The crystals meeting the particle size requirements are thickened, centrifuged, and then qualified products are obtained; all processes of the process are continuous operations, with high automation, uniform product particle size, high purity, low operating costs and small floor area.

[0040] Please refer to Figure 1 、 Figure 3 、 Figure 5, on one side of the condenser 9, there are a steam input pipe 91 and a steam output pipe 92. The output end of the steam input pipe 91 is fixedly connected to a heat exchange box 13. The output end of the condensate water pump 12 is fixedly connected to a return pipe 121. One end of the return pipe 121 is fixedly installed on the surface of the heat exchange box 13. The bottom of the heat exchange box 13 is provided with a water outlet pipe 131. Inside the heat exchange box 13, there is a heat exchange pipe 14. The input end of the heat exchange pipe 14 is fixedly connected to the output end of the return pipe 121. The output end of the heat exchange pipe 14 is fixedly connected to an inlet pipe 141. The output end of the inlet pipe 141 is fixedly connected to a heat preservation box 15. The output end of the heat preservation box 15 is fixedly connected to a drain pipe 151. Inside the heat exchange box 13, there is a drainage cover 16. One side of the drainage cover 16 is fixedly connected to the inner wall of the heat exchange box 13 through a fixing rod 161. Inside the drainage cover 16, there are limiting sliders 162 fixedly connected to the inner wall. On one side of the inner wall of the drainage cover 16, there is an adjusting motor 17 fixedly connected. The output end of the adjusting motor 17 is fixedly connected to an adjusting screw rod 171. On the outer surface of the adjusting screw rod 171, there is a connecting sleeve 172. Inside the connecting sleeve 172, there is an internal thread groove 173. The inner surface of the internal thread groove 173 is threadedly connected to the surface of the adjusting screw rod 171. One side of the connecting sleeve 172 is fixedly connected to a telescopic cover 18. One side of the telescopic cover 18 is fixedly connected to a connecting cover 181. The outer surface of the connecting cover 181 is slidably connected to the inner surface of the drainage cover 16. Inside the connecting cover 181, there is a connecting groove 182. The inner surface of the connecting groove 182 is slidably connected to the surface of the limiting slider 162.

[0041] The heat preservation box 15 facilitates the storage of the warm water after heat exchange. The drain pipe 151 facilitates the discharge of the warm water inside the heat preservation box 15. The output end of the water outlet pipe 131 is connected to the condensate water tank 11, which facilitates the return of the condensed water source in the steam to the inside of the condensate water tank 11 for recovery.

[0042] The input end of the steam input pipe 91 is connected to the steam output end of the crystallizer body 1, which facilitates the heat exchange between the steam and the water source before the steam enters the inside of the condenser 9, so that part of the heat in the steam is heat-exchanged to the condensate water through the heat exchange pipe 14 to obtain warm water. The warm water is input into the inside of the heat preservation box 15 through the heat exchange pipe 14 and the inlet pipe 141 for storage, thus facilitating the storage of the warm water and providing a basis for the recovery and utilization of heat.

[0043] Inside the heat exchange box 13, there is a drainage cover 16 and a telescopic cover 18 that can be telescopically adjusted, which facilitates the overall drainage of the injected substance, enables the temperature in the steam to contact the heat exchange pipe 14 more comprehensively, and ensures the stability of heat exchange.

[0044] When it is necessary to adjust the telescopic range of the telescopic cover 18, start the adjustment motor 17. The adjustment motor 17 drives the adjustment screw 171 to rotate. When the adjustment screw 171 rotates, it drives the connecting sleeve 172 to move horizontally through the internal thread groove 173. When the connecting sleeve 172 moves horizontally, it is slidably connected to the inner surface of the connecting groove 182 through the limit slider 162, thereby ensuring the stability of the horizontal sliding of the connecting sleeve 172.

[0045] The working principle of the present utility model is as follows:

[0046] S1 First, it is necessary to turn on the compressed air before starting the machine. All automatic valves of this equipment need compressed air to open, and the compressed air pressure is 0.4 - 0.8 Mpa;

[0047] S2 Turn on the vacuum pump circulating water and the gland seal cooling water of each circulating pump. This step is very important. Starting the machine without cooling water will damage the mechanical seal of the circulating pump. The normal pressure display of the circulating water is about 0.2 Mpa;

[0048] S3 Check all valves of the equipment, close all vent valves and sewage valves of the equipment, and open the inlet and outlet valves of all pumps;

[0049] S4 Check the steam pressure and slowly open the steam condensate drain valve to drain the steam condensate;

[0050] S5 Turn the molded case circuit breaker in the control cabinet to "ON", and turn on the miniature circuit breaker and control power circuit breaker of the pump to be used;

[0051] S6 Click on the human - machine interface to enter the parameter setting screen, and input the parameters to be set into the system, such as: heating temperature set value, liquid level set value, pressure set value, feed set value and other system operation parameters;

[0052] S7 Turn on the cooling water circulation pump and the valves on the pipeline, and observe whether the pressure at the cooling water inlet is normal. The normal pressure display is about 0.2 Mpa. If the display is abnormal, it may be a circulating pump failure or the valve is not opened;

[0053] S8 Turn on the liquid ring vacuum unit 10 and inspect whether there is any leakage in the equipment. If there is leakage, the sound of air being sucked into the equipment can be heard;

[0054] S9 After the crystallizer vacuum degree display is greater than - 0.085 Mpa, turn on the stock solution pump to inject the stock solution into the interior of the crystallizer body 1 for heat exchange and cooling crystallization;

[0055] S10 After the liquid level of the crystallizer body 1 reaches 1 M, turn on the vertical axial - flow pump 2 at the bottom of the crystallizer body 1 to make the liquid material circulate in the crystallizer body 1;

[0056] After the material liquid level in the crystallizer body 1 reaches the set value, stop feeding the material;

[0057] After the material circulates in the crystallizer body 1 for 4 hours, turn on the vacuum pump and inspect whether the equipment leaks. If there is a leak, you can hear the sound of air being sucked into the equipment. Then turn on the discharge pump 8 to transport the material to the slurry tank 3;

[0058] Open the slurry tank 3. The discharge pump 8 sends the original liquid after heat exchange and cooling crystallization into the slurry tank 3. Start the stirring structure 19. The driving motor 1914 is connected to the rotating shaft 191 to drive the gear disk 192 to rotate. The gear 193 is connected to the stirring rod 194 to drive the rotating ring 197 to drive the stirring blade 195 to rotate accordingly, so as to stir the raw materials inside the slurry tank 3. At the same time, the stirring blade 195 rotates asynchronously with the stirring rod 194 under the push of the stirred solution, and drives the control rod 198 connected to the sliding block 199 to move up and down along the chute 1910, and drives the fixed shaft 1912 connected to the scraper 1913 to scrape the solution deposited at the bottom of the slurry tank 3, making the stirring process more uniform. Then open the discharge valve of the slurry tank 3 to make the material enter the centrifuge 4 for centrifugation. The mother liquor obtained after centrifugation is put into the mother liquor tank 5;

[0059] The first mother liquor pump 6 transports the mother liquor inside the mother liquor tank 5 to the inside of the crystallizer body 1 for continuous cyclic heat exchange and cooling crystallization. The second mother liquor pump 7 pumps out the upper clear mother liquor from the inside of the crystallizer body 1. The condenser 9 recovers and condenses the steam generated inside the crystallizer body 1 to obtain condensed water, and the condensed water is input into the inside of the condensate water tank 11, and then the condensate water pump 12 sends out the condensed water;

[0060] Before the steam enters the inside of the condenser 9, it exchanges heat with the water source, so that part of the heat in the steam is exchanged to the condensed water through the heat exchange tube 14 to obtain warm water. The warm water is input into the inside of the heat preservation box 15 through the heat exchange tube 14 and the inlet pipe 141 for storage. The condensed water source in the steam flows back to the inside of the condensate water tank 11 through the outlet pipe 131 for recovery;

[0061] Start the adjustment motor 17. The adjustment motor 17 drives the adjustment screw 171 to rotate. When the adjustment screw 171 rotates, it drives the connecting sleeve 172 to move horizontally through the internal thread groove 173. When the connecting sleeve 172 moves horizontally, it is slidably connected to the inner surface of the connecting groove 182 through the limit slider 162 to adjust the telescopic range of the telescopic cover 18, which is convenient for the drainage cover 16 and the telescopic cover 18 to drain the whole injected material, so that the temperature in the steam can contact the heat exchange tube 14 more comprehensively;

[0062] During normal production of the equipment, S17 needs to conduct inspections on the temperature, vacuum degree, liquid level, and pressure of the equipment. As described above, this is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A BHC single-stage continuous crystallizer, comprising a crystallizer body (1), characterized in that: A vertical axial flow pump (2) is installed at the fixed bottom of the crystallizer body (1); a slurry barrel (3) is fixedly installed at the output end of the crystallizer body (1); the output end of the slurry barrel (3) is fixedly connected to a centrifuge (4); a mother liquid barrel (5) is fixedly installed at the output end of the centrifuge (4); a first mother liquid pump (6) is fixedly installed at the output end of the mother liquid barrel (5); a second mother liquid pump (7) and a discharge pump (8) are fixedly installed on one side of the crystallizer body (1); a condenser (9) is fixedly installed at the output end of the top of the crystallizer body (1); a liquid ring vacuum unit (10) is fixedly installed at the input end of the condenser (9); a condensate tank (11) is fixedly installed at the output end of the condensate tank (11); a condensate pump (12) is fixedly installed at the output end of the condensate tank (11); a stirring structure (19) for fully stirring is fixedly installed inside the slurry barrel (3); The stirring structure (19) comprises a rotating shaft (191), the outer wall of the rotating shaft (191) is fixedly sleeved with a toothed disc (192), the outer wall of the toothed disc (192) is meshed with a gear (193), a stirring rod (194) is fixedly installed inside the gear (193), the stirring rod (194) is arranged with an inclination angle as a whole to facilitate comprehensive stirring, and a stirring blade (195) is rotatably sleeved on the outer wall of the stirring rod (194).

2. The BHC single-stage continuous crystallizer according to claim 1, characterized in that: The stirring blades (195) are provided in two groups, one upper and one lower, and each group is rotatably connected to the stirring rod (194) via a rotating ring (197). A control rod (198) for controlling the upward and downward movement of the stirring blades (195) is fixedly installed at the bottom end of the rotating ring (197) of the lower group, and the control rod (198) is slidably connected to the stirring rod (194).

3. The BHC single-stage continuous crystallizer according to claim 1, characterized in that: A fixed shaft (1912) is fixedly mounted on the bottom end of the stirring rod (194), a scraper (1913) for scraping off the solution deposited on the bottom of the slurry barrel (3) is fixedly mounted on the bottom end of the fixed shaft (1912), and the scraper (1913) is in contact with the inner wall of the slurry barrel (3), and a driving motor (1914) for providing rotational power to the stirring structure (19) is fixedly mounted on the top of the slurry barrel (3), and the output end of the driving motor (1914) is fixedly connected to the top end of the rotating shaft (191).

4. The BHC single-stage continuous crystallizer according to claim 1, characterized in that: The output end of the first mother liquor pump (6) is fixedly connected to the input end of the crystallizer body (1), and the first mother liquor pump (6) transports the mother liquor in the mother liquor barrel (5) to the inside of the crystallizer body (1) for continuous circulation, heat exchange, cooling and crystallization.

5. The BHC single-stage continuous crystallizer according to claim 1, characterized in that: The input end of the second mother liquor pump (7) is connected to the supernatant mother liquor inside the crystallizer body (1) and is used to extract the supernatant mother liquor from the inside of the crystallizer body (1).

6. The BHC single-stage continuous crystallizer according to claim 1, characterized in that: A steam input pipe (91) and a steam output pipe (92) are provided on one side of the condenser (9); the output end of the steam input pipe (91) is fixedly connected to a heat exchange box (13); the output end of the condensate pump (12) is fixedly connected to a return pipe (121); one end of the return pipe (121) is fixedly mounted on the surface of the heat exchange box (13); a water outlet pipe (131) is provided at the bottom of the heat exchange box (13); and a heat exchanger (13) is provided inside the heat exchange box (13). The heat exchange tube (14) is fixedly connected to the input end of the heat exchange tube (14) and the output end of the return tube (121); the output end of the heat exchange tube (14) is fixedly connected to the introduction tube (141); the output end of the introduction tube (141) is fixedly connected to the insulation box (15); the output end of the insulation box (15) is fixedly connected to the drainage pipe (151); a drainage cover (16) is arranged inside the heat exchange box (13); one side of the drainage cover (16) is connected to the drainage pipe (151) by a fixing rod (161). The heat exchange box (13) is fixedly connected to the inner wall of the drainage cover (16), the inner wall of the drainage cover (16) is fixedly connected to a limit slider (162), one side of the inner wall of the drainage cover (16) is fixedly connected to an adjustment motor (17), the output end of the adjustment motor (17) is fixedly connected to an adjustment screw (171), the outer surface of the adjustment screw (171) is provided with a connecting sleeve (172), the interior of the connecting sleeve (172) is provided with an internal thread groove (173), and the internal thread groove (173) is provided with a plurality of internal threads. The inner surface of the connecting sleeve (172) is threadedly connected to the surface of the adjusting screw (171), one side of the connecting sleeve (172) is fixedly connected to a telescopic cover (18), one side of the telescopic cover (18) is fixedly connected to a connecting cover (181), the outer surface of the connecting cover (181) is slidably connected to the inner surface of the drainage cover (16), a connecting groove (182) is provided inside the connecting cover (181), and the inner surface of the connecting groove (182) is slidably connected to the surface of the limiting slider (162).

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