Heat pump type low-temperature vacuum evaporator

Abstract

The invention discloses a heat pump type low-temperature vacuum evaporator, and belongs to the technical field of wastewater treatment equipment.The heat pump type low-temperature vacuum evaporator comprises a low-temperature evaporator body, the low-temperature evaporator body comprises a shell, a distillation still is fixedly connected into the shell, a rotary driving assembly is fixedly connected into the distillation still, and a water conveying assembly is rotationally connected to the upper side wall of the rotary driving assembly; the water conveying assembly comprises a rotating pipe rotationally connected to the rotating driving assembly, a water conveying pipe is arranged on the upper side of the rotating pipe, a rotating sleeve is rotationally connected between the opposite ends of the rotating pipe and the water conveying pipe, a connecting rod is fixedly connected between the rotating pipe and the water conveying pipe, the upper end of the water conveying pipe communicates with a water storage box, and a pump force assembly is fixedly connected to the upper side wall of the water storage box. The lower side wall of the water storage box is fixedly connected with a plurality of water sprinkling assemblies, the pump force assembly comprises a threaded rod fixedly connected to the water storage box, through cooperation of the water conveying assembly and the pump force assembly, after wastewater boils, the wastewater is pumped to a high position to be scattered, then the surface area of the wastewater is increased, and the evaporation efficiency of the wastewater is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically a heat pump type low-temperature vacuum evaporator. Background Technology

[0002] The heat pump-type low-temperature vacuum evaporator is a highly efficient and energy-saving evaporation device. Its core principle is based on heat pump circulation and vacuum evaporation technology. This equipment uses a vacuum pump to reduce the pressure in the evaporation chamber to -0.095 to -0.098 MPa, causing the liquid to boil and evaporate at a low temperature of 30-40℃. Simultaneously, the heat pump system uses the heat energy generated by the compressor to heat the material, and the cold energy released at the condenser end is used for steam condensation, achieving energy recycling. Compared to traditional evaporation technology, its energy consumption can be reduced by more than 90%, and it does not require an external steam source or cooling water system, significantly reducing the cost of supporting facilities. The equipment adopts a modular design, has a small footprint, a high degree of automation, can be started with one button and can operate unattended for 24 hours, has a low failure rate and is easy to maintain. Its low-temperature evaporation characteristics are particularly suitable for the treatment of heat-sensitive materials and corrosive wastewater, effectively extending equipment life and reducing the risk of scaling. The treated condensate is of excellent quality and can be reused or discharged in compliance with standards, while the concentrated liquid is discharged through an automatic sewage discharge system, achieving wastewater reduction and resource recovery. This equipment is widely used in chemical, pharmaceutical, food and environmental protection fields, and is an ideal solution for zero discharge of industrial wastewater and recycling of resources.

[0003] Chinese patent discloses a wastewater heat pump type low-temperature evaporator (authorization announcement number CN112093836B). This patent solves the shortcomings of the prior art and includes a demister, a first heat exchanger, a second heat exchanger, and a condensate circulation tank. The bottom of the demister is fixedly connected to a Teflon plate, and a defoaming device is installed on the top of the Teflon plate. The defoaming device is located inside the demister. A steam pipeline is fixedly connected to one side of the demister via a flange.

[0004] When treating wastewater, the efficiency of a low-temperature evaporator is closely related to the amount of distilled water discharged. Many existing low-temperature evaporators, including the patent mentioned above, suffer from low heating efficiency of the wastewater in the distillation vessel. Moreover, once the wastewater is heated to its boiling point, its evaporation rate does not change significantly and cannot be increased further. As a result, the efficiency of condensing the wastewater into steam and then into distilled water is also very low, which affects the overall effect of the low-temperature evaporator in treating wastewater. To address this, we propose a heat pump type low-temperature vacuum evaporator. Summary of the Invention

[0005] The purpose of this invention is to provide a heat pump type low-temperature vacuum evaporator to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heat pump type low-temperature vacuum evaporator includes a low-temperature evaporator, which includes a shell. A distillation vessel is fixedly connected inside the shell. A rotary drive assembly is fixedly connected inside the distillation vessel. A water supply assembly is rotatably connected to the upper side wall of the rotary drive assembly. The water supply assembly includes a rotating pipe rotatably connected to the rotary drive assembly. A water supply pipe is provided on the upper side of the rotating pipe. A rotating sleeve is rotatably connected between the opposite ends of the rotating pipe and the water supply pipe. A connecting rod is fixedly connected between the rotating pipe and the water supply pipe. A water storage box is connected to the upper end of the water supply pipe. A pump force assembly is fixedly connected to the upper side wall of the water storage box. Multiple water spraying assemblies are fixedly connected to the lower side wall of the water storage box.

[0008] The pump force assembly includes a threaded rod fixedly connected to a water storage box, a threaded sleeve threadedly connected to the threaded rod, a piston fixedly connected to the upper end of the threaded sleeve, a fixed cylinder on the upper side of the threaded rod, and the piston slidably connected inside the fixed cylinder. Two limiting blocks fixedly connected to the fixed cylinder are slidably connected to the side wall of the threaded sleeve. Two transmission pipes are connected to the upper end of the fixed cylinder, and the two transmission pipes are respectively connected to a pump cylinder. A movable plug is slidably connected inside the pump cylinder. A water pumping pipe is connected to the lower end of the pump cylinder. A delivery pipe is connected between the side wall of the pump cylinder and the rotating pipe. One-way valves are fixedly connected to both the water pumping pipe and the delivery pipe. A flow booster is installed on the delivery pipe, and a cleaning component is installed on the water delivery pipe.

[0009] As a further embodiment of the present invention, the low-temperature evaporator also includes a water inlet pipe connected to the side wall of the distillation vessel, a slag discharge pipe connected to the bottom of the distillation vessel, a condensation assembly connected to the upper end of the distillation vessel, and a vacuum pump connected to the condensation assembly inside the shell.

[0010] As a further embodiment of the present invention, a heat pump assembly is installed between the distillation vessel and the condensation assembly, and a heating coil connected to the heat pump assembly is fixedly connected inside the distillation vessel.

[0011] As a further embodiment of the present invention, the rotary drive assembly includes a mounting frame fixedly connected inside the distillation vessel, a driven block rotatably connected to the upper side wall of the mounting frame, a drive motor fixedly connected inside the mounting frame, a drive block fixedly connected to the output end of the drive motor, and the drive block and the driven block are magnetically coupled.

[0012] As a further embodiment of the present invention, the water spraying assembly includes an installation cylinder connected to the lower side wall of the water storage box, a sealing sleeve fixedly connected to the inner wall of the lower end of the installation cylinder, a water spraying cylinder inserted into the sealing sleeve, and a limit plate fixedly connected inside the installation cylinder.

[0013] As a further embodiment of the present invention, a top plate is fixedly connected to the upper end of the sprinkler cylinder, and a thrust spring is fixedly connected between the top plate and the inner wall of the lower end of the mounting cylinder. Multiple spray holes are drilled on the sprinkler cylinder.

[0014] As a further embodiment of the present invention, the flow boosting component includes a valve housing connected to the delivery pipe, a three-way valve core rotatably connected inside the valve housing, and a water spray pipe connected to the upper end of the valve housing.

[0015] As a further embodiment of the present invention, a fixed box is fixedly connected inside the distillation vessel, and worm gears are fixedly connected to both three-way valve cores. A worm is fixedly connected inside the fixed box and rotatably connected to the inner side wall of the distillation vessel, and the worm meshes with the worm gears.

[0016] As a further embodiment of the present invention, an adjusting motor is fixedly connected to the side wall of the distillation vessel, and the output end of the adjusting motor is fixedly connected to the worm gear.

[0017] As a further embodiment of the present invention, the scraping assembly includes a sliding sleeve slidably connected to the water supply pipe, a scraping sleeve sleeved on the heating coil, and a guide rod fixedly connected between the scraping sleeve and the sliding sleeve.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. When this invention is used, the water conveying component and the pumping component work together to pump the wastewater to a high place after it boils and then sprinkle it, thereby increasing the surface area of ​​the wastewater and improving the evaporation efficiency of the wastewater.

[0020] 2. When using this invention, the water spraying component can automatically adjust the size of the spray holes under pressure when the water becomes viscous due to the evaporation of wastewater. This not only reduces operating energy consumption but also reduces the pressure inside the water delivery component and the water spraying component, thus extending their service life.

[0021] 3. When using this invention, the flow booster can pump the wastewater to the heating coil through the spray pipe before it boils, thereby improving the flowability of the wastewater and thus improving the heating efficiency of the wastewater to a certain extent.

[0022] 4. When using this invention, the cleaning component can clean the surface of the heating coil during the rotation of the water pipe, preventing oil or other chemicals in the wastewater from adhering to the surface of the heating coil and affecting its heat transfer efficiency, thereby further improving the heating efficiency of the wastewater. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a heat pump-type low-temperature vacuum evaporator.

[0024] Figure 2 This is a schematic diagram of the structure of the low-temperature evaporator in a heat pump type low-temperature vacuum evaporator.

[0025] Figure 3 This is a schematic diagram of the internal structure of the distillation vessel in a heat pump-type low-temperature vacuum evaporator.

[0026] Figure 4 This is a schematic diagram of the rotary drive assembly in a heat pump-type low-temperature vacuum evaporator.

[0027] Figure 5 This is a schematic diagram of the pump force component in a heat pump type low-temperature vacuum evaporator.

[0028] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 for Figure 5 Enlarged view of point B in the middle;

[0030] Figure 8 This is a schematic diagram of the water spraying component in a heat pump-type low-temperature vacuum evaporator.

[0031] Figure 9 for Figure 8 Enlarged view of point C in the middle;

[0032] Figure 10 This is a schematic diagram of the flow booster and cleaning components in a heat pump-type low-temperature vacuum evaporator.

[0033] In the picture:

[0034] 1. Low-temperature evaporator; 101. Shell; 1011. Water inlet pipe; 1012. Slag discharge pipe; 102. Distillation kettle; 103. Vacuum pump; 104. Condensation assembly; 105. Heat pump assembly; 106. Heating coil;

[0035] 2. Rotary drive assembly; 201. Mounting frame; 202. Driven block; 203. Drive motor; 204. Drive block;

[0036] 3. Water delivery components; 301. Spinner pipe; 302. Water delivery pipe; 303. Spinner sleeve; 304. Connecting rod; 305. Water storage box;

[0037] 4. Pump force assembly; 401. Threaded rod; 402. Threaded sleeve; 403. Limiting block; 404. Piston; 405. Fixed cylinder; 406. Transmission pipe; 407. Pump cylinder; 408. Moving plug; 409. Pumping pipe; 410. Delivery pipe; 411. Check valve;

[0038] 5. Sprinkler assembly; 501. Mounting cylinder; 502. Sealing sleeve; 503. Sprinkler cylinder; 504. Limiting plate; 505. Top plate; 506. Thrust spring; 507. Sprinkler hole;

[0039] 6. Flow booster assembly; 601. Valve housing; 602. Three-way valve core; 603. Spray pipe; 604. Fixing box; 605. Worm gear; 606. Worm; 607. Regulating motor;

[0040] 7. Scraping assembly; 701. Sliding sleeve; 702. Scraper sleeve; 703. Guide rod. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1: Please refer to Figures 1 to 9 In this embodiment of the invention, a heat pump type low-temperature vacuum evaporator includes a low-temperature evaporator 1. The low-temperature evaporator 1 includes a shell 101. A distillation vessel 102 for storing and heating wastewater is fixedly connected inside the shell 101. The lower end of the distillation vessel 102 has a conical structure to facilitate the discharge of the remaining concentrate after the wastewater evaporates. A rotary drive assembly 2 for driving a water supply pipe 302 to rotate is fixedly connected inside the distillation vessel 102. A water supply assembly 3 for transporting wastewater from the bottom to a higher position is rotatably connected to the upper side wall of the rotary drive assembly 2. The water supply assembly 3 includes a rotating pipe 301 rotatably connected to the upper side wall of the mounting frame 201 via a driven block 202, and a driven block 202. The 204 assembly is a magnetic coupler, which is existing technology and will not be described in detail here. A water supply pipe 302 is vertically arranged on the upper side of the rotating pipe 301, and the water supply pipe 302 is located at the center of the heating coil 106. A rotating sleeve 303 is rotatably connected between the opposite ends of the rotating pipe 301 and the water supply pipe 302 through a mechanical seal. A connecting rod 304 is fixedly connected between the opposite ends of the rotating pipe 301 and the water supply pipe 302 by welding. A water storage box 305 is connected to and fixed at the upper end of the water supply pipe 302. A pump force component 4 for providing water pumping driving force is fixedly connected to the upper side wall of the water storage box 305. Multiple water spray components 5 for adjusting the water spray size are fixedly connected to the lower side wall of the water storage box 305.

[0043] The pump force assembly 4 includes a threaded rod 401 fixedly connected to the center of the upper side wall of the water storage box 305. A threaded sleeve 402 is threadedly connected to the threaded rod 401. A piston 404 is fixedly connected to the upper end of the threaded sleeve 402. A fixed cylinder 405 is provided on the upper side of the threaded rod 401, and the piston 404 is slidably connected inside the fixed cylinder 405. Two limiting blocks 403 are slidably connected to the side wall of the threaded sleeve 402 and fixedly connected to the inner side wall of the fixed cylinder 405. The limiting blocks 403 can prevent the threaded sleeve 402 from rotating. Two transmission pipes 406 are connected to the upper end of the fixed cylinder 405. The two transmission pipes 406 are respectively connected to the pump cylinder 407. The fixed cylinder 405, the transmission pipes 406 and the pump cylinder 407 are all filled with hydraulic oil. When the piston 404 moves upward, the hydraulic oil inside the fixed cylinder 405 flows through the transmission pipes. 406 pushes the movable plug 408 downward, and vice versa, the movable plug 408 moves upward. The movable plug 408 is slidably connected inside the pump cylinder 407. The lower end of the pump cylinder 407 is connected to a pumping pipe 409 for pumping in wastewater. The side wall of the pump cylinder 407 is connected to the rotating pipe 301 for conveying wastewater through a conveying pipe 410. One-way valves 411 are fixedly connected to both the pumping pipe 409 and the conveying pipe 410. When the movable plug 408 moves up and down back and forth, it can continuously pump in wastewater through the pumping pipe 409 and then discharge it into the rotating sleeve 303 through the conveying pipe 410. The structure of the two one-way valves 411 is similar to that of an air pump. A flow booster component 6 for adjusting the direction of water flow is installed on the conveying pipe 410. A cleaning component 7 for cleaning the oil stains on the surface of the heating coil 106 is installed on the water supply pipe 302.

[0044] The low-temperature evaporator 1 also includes an inlet pipe 1011 connected to the side wall of the distillation vessel 102 for discharging wastewater, a slag discharge pipe 1012 connected to the bottom of the distillation vessel 102 for discharging waste residue, and a condenser assembly 104 connected to the upper end of the distillation vessel 102 for condensing water vapor into water. The condenser tube of the condenser assembly 104 is connected to the heat pump assembly 105. A vacuum pump 103, connected to the condenser assembly 104, is also installed inside the shell 101 for evacuating the distillation vessel 102 and storing distilled water. When the inside of the distillation vessel 102 is evacuated by the vacuum pump 103, the boiling point of the wastewater will decrease. A connection is established between the distillation vessel 102 and the condenser assembly 104. The heat pump assembly 105 is equipped with a heat pump component 105 for heating wastewater and condensing water vapor. The temperature of the refrigerant after compression by the compressor rises. When the refrigerant is transported in the heating coil 106, it heats the wastewater and lowers the boiling point of the wastewater. Therefore, the wastewater only needs to be heated to 30-40 degrees Celsius to boil. The other end of the heating coil 106 is connected to the condenser tube of the condensation assembly 104. After the refrigerant cools down, the water vapor cools down rapidly and condenses into water after encountering the condenser tube. The heating coil 106, which is connected to the heat pump assembly 105, is fixedly connected inside the distillation vessel 102. The structure and principle of the low-temperature evaporator 1 are well known to those skilled in the art and will not be described in detail here.

[0045] The rotary drive assembly 2 includes a mounting frame 201 fixedly connected inside the distillation vessel 102. The distillation vessel 102 has open structures at both ends of the mounting frame 201 to facilitate the connection of the drive motor 203 to the power supply. A driven block 202 is rotatably connected to the upper side wall of the mounting frame 201 via a rotating shaft. The drive motor 203 is fixedly connected inside the mounting frame 201 by bolts. A drive block 204 is fixedly connected to the output end of the drive motor 203, and the drive block 204 and the driven block 202 are magnetically coupled. When the drive motor 203 starts, it can drive the driven block 202 to rotate through the drive block 204, so that the driven block 202 can drive the water pipe 302 to rotate through the rotating pipe 301 and the connecting rod 304.

[0046] The water spraying assembly 5 includes an installation cylinder 501 connected to and fixed to the lower side wall of the water storage box 305. A sealing sleeve 502 for blocking the spray holes 507 is fixedly connected to the inner wall of the lower end of the installation cylinder 501. A water spraying cylinder 503 is inserted into the sealing sleeve 502. Wastewater is discharged from the spray holes 507 through the water storage box 305 and the water spraying cylinder 503. A limiting plate 504 is fixedly connected inside the installation cylinder 501. A top plate 505 is fixedly connected to the upper end of the water spraying cylinder 503. A thrust spring 506 is fixedly connected between the top plate 505 and the inner wall of the lower end of the installation cylinder 501. The top plate 505 abuts against the limiting plate 504 through the thrust spring 506. Multiple inverted T-shaped spray holes 507 are drilled on the water spraying cylinder 503. This structure allows the wastewater to pass through the bottom of the spray holes 507 when sprayed before evaporation and concentration, forming a flat shape when spraying. This can further increase the surface area of ​​the wastewater and improve the evaporation efficiency.

[0047] Example 2: Please refer to Figure 10 Based on Embodiment 1, the flow booster assembly 6 includes a valve housing 601 connected to and fixed on the delivery pipe 410. A three-way valve core 602 is rotatably connected inside the valve housing 601. A T-shaped valve hole is drilled inside the three-way valve core 602. A water spray pipe 603 for spraying water is connected to the upper end of the valve housing 601. Multiple evenly distributed water spray nozzles are drilled on the water spray pipe 603. During water spraying, the heating effect on the wastewater and the area around the heating coil 106 is improved. A fixing box 604 for isolating wastewater is fixedly connected inside the distillation vessel 102. Two three-way valve cores... Worm gears 605 are fixedly connected to each of the 602. A worm 606 is fixedly connected inside the fixed box 604 and is rotatably connected to the inner side wall of the distillation vessel 102. The worm 606 meshes with the worm gears 605. An adjusting motor 607 is fixedly connected to the side wall of the distillation vessel 102. The output end of the adjusting motor 607 is fixedly connected to the worm 606. When the adjusting motor 607 is started, it can drive the worm gear 605 to rotate through the worm 606, so that the worm gear 605 drives the three-way valve core 602 to rotate, thereby realizing the connection and switching between the water spray pipe 603 and the delivery pipe 410.

[0048] The cleaning and scraping assembly 7 includes a sliding sleeve 701 slidably connected to the water supply pipe 302. The water supply pipe 302 has a groove. The sliding sleeve 701 slides in the groove through a locking block fixed to its inner wall. When the water supply pipe 302 rotates, the water supply pipe 302 drives the scraper sleeve 702 to move on the heating coil 106 through the sliding sleeve 701, so that the scraper sleeve 702 can scrape off the oil stains on the surface of the heating coil 106. The scraper sleeve 702 for cleaning oil stains is sleeved on the heating coil 106. A guide rod 703 is fixedly connected between the scraper sleeve 702 and the sliding sleeve 701. When the scraper sleeve 702 scrapes from the upper end to the lower end of the heating coil 106, the drive motor 203 will reverse.

[0049] The working principle of this invention is:

[0050] When using this invention, the operator first discharges wastewater into the distillation vessel 102 through the inlet pipe 1011. Then, the vacuum pump 103 is started to evacuate the distillation vessel 102 and the condenser assembly 104, thereby lowering the boiling point of the wastewater inside the distillation vessel 102. Subsequently, the heat pump assembly 105 is started, and the heating coil 106 is used to heat the wastewater inside the distillation vessel 102. When the wastewater is heated to 30-40 degrees Celsius, it will boil. The water vapor will quickly cool down and condense into water after encountering the condenser.

[0051] After the wastewater is heated and boiled, the operator starts the drive motor 203 and the regulating motor 607. The regulating motor 607 drives the worm gear 605 to rotate, which in turn drives the three-way valve core 602 to rotate. This connects the pump cylinder 407 to the delivery pipe 410 via the three-way valve core 602. The drive motor 203 drives the driven block 202 to rotate via the drive block 204, allowing the driven block 202 to rotate the water delivery pipe 302 in both directions via the rotating pipe 301 and the connecting rod 304. During the rotation of the water delivery pipe 302, the water storage box 305 moves the threaded sleeve 402 up and down via the threaded rod 401. The threaded sleeve 402 then moves the piston 404 up and down. The hydraulic oil inside the fixed cylinder 405 moves through the transmission pipe 406. The movable plug 408 moves up and down. When the movable plug 408 moves up and down repeatedly, wastewater can be continuously drawn in through the pumping pipe 409 and discharged into the rotating sleeve 303 through the conveying pipe 410. Through two one-way valves 411, the structure and principle are similar to an air pump. The wastewater is discharged to the water storage box 305 through the rotating sleeve 303 and finally sprayed out through the spraying component 5. Before the wastewater evaporates and concentrates, the wastewater can pass through the bottom of the spray hole 507 and form a flat shape when spraying. This can further increase the surface area of ​​the wastewater and improve the evaporation efficiency. As the wastewater gradually evaporates and concentrates, the wastewater conveying pressure increases, causing the spraying pipe 503 to gradually move downward, and more and more of the spray hole 507 is exposed. This effectively reduces the wastewater conveying pressure.

[0052] Before the wastewater boils, the pump cylinder 407 is connected to the spray pipe 603 through the three-way valve core 602. At this time, the wastewater will be discharged through the spray pipe 603, which increases the flow of wastewater around the heating coil 106 and improves the wastewater heating efficiency. In addition, when the water supply pipe 302 rotates in both directions, the water supply pipe 302 drives the scraper sleeve 702 to move up and down along the heating coil 106 in a spiral trajectory through the sliding sleeve 701, so that the scraper sleeve 702 can scrape off the oil stains on the surface of the heating coil 106, improve the heat conduction efficiency of the heating coil 106, and further improve the wastewater heating efficiency.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heat pump type low-temperature vacuum evaporator, comprising a low-temperature evaporator (1), characterized in that, The device includes a low-temperature evaporator (1), which includes a shell (101). A distillation vessel (102) is fixedly connected inside the shell (101). A rotary drive assembly (2) is fixedly connected inside the distillation vessel (102). A water supply assembly (3) is rotatably connected to the upper side wall of the rotary drive assembly (2). The water supply assembly (3) includes a rotating pipe (301) rotatably connected to the rotary drive assembly (2). The upper side of the rotating pipe (301) is provided with... There is a water supply pipe (302), and a rotating sleeve (303) is rotatably connected between the rotating pipe (301) and the opposite end of the water supply pipe (302). A connecting rod (304) is fixedly connected between the rotating pipe (301) and the water supply pipe (302). A water storage box (305) is connected to the upper end of the water supply pipe (302). A pump force assembly (4) is fixedly connected to the upper side wall of the water storage box (305). Multiple water spraying assemblies (5) are fixedly connected to the lower side wall of the water storage box (305). The pump force assembly (4) includes a threaded rod (401) fixedly connected to a water storage box (305), a threaded sleeve (402) threadedly connected to the threaded rod (401), a piston (404) fixedly connected to the upper end of the threaded sleeve (402), a fixed cylinder (405) provided on the upper side of the threaded rod (401), and the piston (404) slidably connected inside the fixed cylinder (405). Two limiting blocks fixedly connected to the fixed cylinder (405) are slidably connected to the side wall of the threaded sleeve (402). 403), the upper end of the fixed cylinder (405) is connected to two transmission pipes (406), the two transmission pipes (406) are respectively connected to the pump cylinder (407), the pump cylinder (407) is slidably connected to the moving plug (408), the lower end of the pump cylinder (407) is connected to the water pumping pipe (409), the side wall of the pump cylinder (407) is connected to the rotating pipe (301) and the conveying pipe (410) are connected to the conveying pipe (409) and the conveying pipe (410) respectively. One-way valves (411) are fixedly connected to both the water pumping pipe (409) and the conveying pipe (410).

2. The heat pump type low-temperature vacuum evaporator according to claim 1, characterized in that, The low-temperature evaporator (1) also includes a water inlet pipe (1011) connected to the side wall of the distillation vessel (102), a slag discharge pipe (1012) connected to the bottom of the distillation vessel (102), a condenser assembly (104) connected to the upper end of the distillation vessel (102), and a vacuum pump (103) connected to the condenser assembly (104) is also provided inside the shell (101).

3. A heat pump type low-temperature vacuum evaporator according to claim 2, characterized in that, A heat pump assembly (105) is installed between the distillation vessel (102) and the condensation assembly (104), and a heating coil (106) connected to the heat pump assembly (105) is fixedly connected inside the distillation vessel (102).

4. A heat pump type low-temperature vacuum evaporator according to claim 1, characterized in that, The rotary drive assembly (2) includes a mounting frame (201) fixedly connected inside the distillation vessel (102). A driven block (202) is rotatably connected to the upper side wall of the mounting frame (201). A drive motor (203) is fixedly connected inside the mounting frame (201). A drive block (204) is fixedly connected to the output end of the drive motor (203), and the drive block (204) and the driven block (202) are magnetically coupled.

5. A heat pump type low-temperature vacuum evaporator according to claim 1, characterized in that, The water spraying assembly (5) includes an installation cylinder (501) connected to the lower side wall of the water storage box (305). A sealing sleeve (502) is fixedly connected to the inner wall of the lower end of the installation cylinder (501). A water spraying cylinder (503) is inserted into the sealing sleeve (502). A limiting plate (504) is fixedly connected inside the installation cylinder (501).

6. A heat pump type low-temperature vacuum evaporator according to claim 5, characterized in that, A top plate (505) is fixedly connected to the upper end of the sprinkler cylinder (503), and a thrust spring (506) is fixedly connected between the top plate (505) and the inner wall of the lower end of the mounting cylinder (501). Multiple sprinkler holes (507) are drilled on the sprinkler cylinder (503).

7. A heat pump type low-temperature vacuum evaporator according to claim 1, characterized in that, A flow booster assembly (6) is installed on the delivery pipe (410). The flow booster assembly (6) includes a valve housing (601) connected to the delivery pipe (410). A three-way valve core (602) is rotatably connected inside the valve housing (601). A water spray pipe (603) is connected to the upper end of the valve housing (601).

8. A heat pump type low-temperature vacuum evaporator according to claim 7, characterized in that, A fixed box (604) is fixedly connected inside the distillation vessel (102). Worm gears (605) are fixedly connected to both three-way valve cores (602). A worm (606) is fixedly connected inside the fixed box (604) and is rotatably connected to the inner side wall of the distillation vessel (102). The worm (606) meshes with the worm gear (605).

9. A heat pump type low-temperature vacuum evaporator according to claim 8, characterized in that, An adjusting motor (607) is fixedly connected to the side wall of the distillation vessel (102), and the output end of the adjusting motor (607) is fixedly connected to the worm gear (606).

10. A heat pump type low-temperature vacuum evaporator according to claim 3, characterized in that, A cleaning assembly (7) is provided on the water supply pipe (302). The cleaning assembly (7) includes a sliding sleeve (701) slidably connected to the water supply pipe (302). A scraper sleeve (702) is sleeved on the heating coil (106). A guide rod (703) is fixedly connected between the scraper sleeve (702) and the sliding sleeve (701).

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