Evaporation system with refrigeration circuit

Abstract

The invention relates to the technical field of wastewater treatment equipment, in particular to an evaporation system with a refrigerating loop, which comprises an evaporation separator, a crystallizer, a dryer, a refrigerating loop, a conical circular truncated cone, a fixing frame, an electromagnetic telescopic rod, an extension spring and a liquid sealing plate, a high-salinity wastewater concentrated solution which just reaches a saturated state quickly flows downwards into the crystallizer along the surface of the conical circular truncated cone, so that a large amount of crystallized salt is prevented from being crystallized and separated out in the evaporation separator and is immediately mixed with the concentrated solution to be adhered to the inner wall of the evaporation separator, and adverse effects on subsequent high-salinity wastewater treatment are avoided; the high-salinity wastewater is cooled in the crystallizer through the refrigerating loop, so that the technical effect of rapidly and greatly reducing the salt content of the high-salinity wastewater concentrated solution is realized.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment equipment, in particular to an evaporation system with a refrigeration circuit. Background Art

[0002] In recent years, with the rapid development of industrialization and modernization in my country, more and more high-salt wastewater is produced in the daily industrial production process in the fields of petroleum, chemical industry, metallurgy and electricity. In order to accommodate these high-salt wastewater, in many places, such as some industrial parks in the northern region, people have built evaporation ponds for temporary storage, but as time goes by, the evaporation ponds will inevitably be filled and will not be able to continue to store more high-salt wastewater; and if the high-salt wastewater is to be discharged, for the sake of environmental protection and full utilization of resources, before discharge, the salt in the high-salt wastewater needs to be concentrated and crystallized, the salt is separated from the wastewater, and the salt content of the high-salt wastewater is reduced, so that it can be discharged only after it meets the discharge standards for saline wastewater.

[0003] In the existing technology, evaporation and concentration desalination is the most economical and effective method for desalination of high-salt wastewater. Other methods such as cultivating salt-containing bacteria are difficult to operate in industrial practice. In the process of applying evaporation desalination technology to different wastewater treatment scenarios at different development stages, various evaporation and concentration technologies for high-salt wastewater have gradually developed, such as single-effect evaporation, multi-effect evaporation, multi-stage flash evaporation, steam compression condensation, mechanical compression, etc. When the above evaporation and concentration process treats the wastewater concentrate obtained by evaporation, the crystallized salt is usually not separated from the mother liquor, but directly discharged for biochemical treatment by subsequent processes, or the crystallized salt that has been crystallized during the evaporation and concentration process is separated by centrifugation.

[0004] At normal temperature and pressure, the solubility of salt components in water is usually high. Therefore, in the process of treating the wastewater concentrated mother liquor through these treatment methods, it is usually difficult to fully remove the salt in the mother liquor, resulting in the mother liquor after separating the crystallized salt in the concentrate may still be wastewater with a high salt content, which has not yet reached the standard for entering the subsequent process for biochemical treatment. There is a possibility that it will need to re-enter the evaporator for evaporation and concentration multiple times, thereby reducing the treatment effect of the evaporator on high-salt wastewater. When the stock of high-salt wastewater to be treated is large, the mother liquor that has been evaporated will be reintroduced into the evaporator for treatment, which will inevitably increase the burden on the evaporator, thereby reducing the wastewater treatment capacity of the evaporator per unit time, and there is even a risk that the high-salt wastewater in the production process cannot be treated in time, and the established industrial production plan cannot proceed as usual.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes an evaporation system with a refrigeration circuit. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the technical solution adopted by the present invention to solve the technical problem is: an evaporation system with a refrigeration circuit described in the present invention comprises:

[0007] An evaporation separator, wherein the side wall of the evaporation separator is provided with a plurality of connecting pipes and connecting flanges necessary for evaporating and separating the water in the high-salinity wastewater;

[0008] Also includes:

[0009] A crystallizer, the top end of which is connected to the outer wall of the bottom end of the evaporation separator via a crystallization flange;

[0010] A dryer, the dryer is located below the crystallizer and is used to remove moisture on the surface of the crystallized salt in a timely manner;

[0011] A refrigeration circuit acts on the crystallizer and the dryer at the same time to improve the working efficiency of the crystallizer and the dryer.

[0012] Preferably, a conical cone closing inwardly is fixedly connected to the bottom of the evaporation separator, and a cross-shaped fixing frame is fixedly connected to the bottom of the conical cone; an electromagnetic telescopic rod is fixedly connected to the center position of the upper end of the fixing frame, and the electromagnetic telescopic rod is controlled in real time by the evaporation system control center; a tension spring is fixedly connected to the outer shell of the electromagnetic telescopic rod, and a liquid sealing plate is fixedly connected to the upper end of the electromagnetic telescopic rod, and the liquid sealing plate is slidably and sealingly connected to the bottom end of the conical cone.

[0013] Preferably, the crystallizer comprises:

[0014] A crystalline outer wall, which has a relatively high thickness and is made of a thermal insulation material with low thermal conductivity and low linear expansion coefficient, such as thermal insulation mortar;

[0015] A crystalline inner wall, wherein the crystalline inner wall is relatively thin and is made of a metal material with high thermal conductivity and low linear expansion coefficient, such as an aluminum alloy;

[0016] Preferably, the evaporation copper tube of the refrigeration circuit is surrounded in the gap between the crystal inner wall and the crystal outer wall, and the evaporation copper tube passes through the crystal outer wall and is connected to the compression device and the expansion valve of the refrigeration circuit.

[0017] Preferably, the evaporation copper tube is fixed to the crystal inner wall by welding, and the inner wall of the crystal inner wall is evenly and fixedly connected with capillary copper tubes arranged obliquely downward, and the capillary copper tubes are all encapsulated with phase change coolant.

[0018] Preferably, a water pump is connected through the bottom of one side of the crystallizer, the pipe mouth of the water pump is fixedly connected to a solid-liquid filter plate, and the water pipe cross-section of the water pump located inside the crystallizer is designed to be upwardly inclined conical.

[0019] Preferably, the bottom end of the crystallizer is rotatably connected with evenly distributed electric-controlled blades, and a non-metallic thermal insulation layer is fixedly bonded to the surface of the electric-controlled blades. When the electric-controlled blades are rotated to the closest horizontal position, the crystallizer and the dryer can be sealed and isolated.

[0020] Preferably, the side wall of the compression device of the dryer close to the refrigeration circuit is evenly provided with hot air holes, and one end of the compression device close to the hot air holes is fixedly connected to a hot air pipe. It is worth noting that the hot air holes are not connected to the heat branch pipe and there is a certain interval between them.

[0021] Preferably, a ventilation hole is provided at the bottom of the dryer, a negative pressure fan is rotatably connected to the inner wall of the bottom of the dryer, a filter baffle for only air to pass through is provided at the upper end of the negative pressure fan, and the filter baffle is fixedly connected to the inner wall of the dryer.

[0022] Preferably, the bottom end of the crystallizer and the top end of the dryer are detachably connected.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. Once it is detected that the salt concentration of the high-salt wastewater is no longer increasing, the control center immediately controls the electromagnetic telescopic rod, one end of which is fixed on the fixed frame and the other end is fixed on the sealing plate, to be energized and extended upward, thereby driving the sealing plate at the bottom of the conical cone to slide upward, causing the sealing effect between the sealing plate and the conical cone to fail and expose a gap. The high-salt wastewater concentrate that has just reached saturation quickly flows downward along the surface of the conical cone, passes through the gap and falls into the crystallizer, preventing a large amount of crystalline salt from crystallizing and precipitating in the evaporation separator, and then mixing with the concentrated liquid and adhering to the inner wall of the evaporation separator, thereby having an adverse effect on the subsequent high-salt wastewater treatment.

[0025] 2. Let it stand for a while until the detection result of the salt monitor in the crystallizer no longer decreases and remains unchanged, which means that the salt components in the high-salt wastewater have dropped to a level that meets the standards for subsequent biochemical treatment, thereby achieving the technical effect of rapidly and significantly reducing the salt content of the high-salt wastewater concentrate, avoiding repeated treatment of high-salt wastewater, and reducing the workload of the evaporation system.

[0026] 3. Capillary copper tubes arranged obliquely downward are evenly fixed and connected on the inner wall of the crystallization inner wall, and phase change coolant is encapsulated inside, so that the high-salt wastewater located at the center can also participate in the heat exchange with the refrigerant in the evaporating copper tube, thereby achieving the technical effect of further improving the cooling rate of the high-salt wastewater with the help of the gas-liquid change of the phase change coolant, and further accelerating the precipitation rate of crystallized salt in the high-salt wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a three-dimensional structural cross-sectional view of the crystallizer of the present invention;

[0030] Figure 3 It is a cross-sectional view of the overall structure of the conical truncated cone and its related structures of the present invention;

[0031] Figure 4 The present invention Figure 3 The enlarged view of point A in the middle;

[0032] Figure 5 It is a schematic structural diagram of the water pumping pipe of the present invention;

[0033] Figure 6 is a three-dimensional structural cross-sectional view of the dryer of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the refrigeration circuit of the present invention.

[0035] In the figure: 1. evaporation separator; 2. crystallizer; 3. dryer; 4. refrigeration circuit; 5. conical frustum; 6. fixing frame; 7. electromagnetic telescopic rod; 8. tension spring; 9. sealing liquid plate; 10. crystallization outer wall; 11. crystallization inner wall; 12. evaporation copper tube; 13. compression device; 14. expansion valve; 15. capillary copper tube; 16. water pumping pipe; 17. solid-liquid filter plate; 18. electric control blade; 19. hot air hole; 20. hot air pipe; 21. ventilation hole; 22. negative pressure fan; 23. filter partition. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figures 1 to 7 As shown, an embodiment of the present invention provides an evaporation system with a refrigeration circuit, comprising:

[0038] An evaporation separator 1, wherein the side wall of the evaporation separator 1 is provided with a plurality of connecting pipes and connecting flanges necessary for evaporating and separating the water in the high-salinity wastewater;

[0039] Also includes:

[0040] A crystallizer 2, wherein the top position of the crystallizer 2 is connected to the outer wall of the bottom end of the evaporation separator 1 through a crystallization flange;

[0041] A dryer 3, the dryer 3 is located below the crystallizer 2, and the dryer 3 is used to remove moisture on the surface of the crystallized salt in a timely manner;

[0042] The refrigeration circuit 4 acts on the crystallizer 2 and the dryer 3 at the same time, so as to improve the working efficiency of the crystallizer 2 and the dryer 3.

[0043] As an embodiment of the present invention, the bottom of the evaporation separator 1 is fixedly connected to a conical cone 5 with an inward closing, and the bottom of the conical cone 5 is fixedly connected to a cross-shaped fixing frame 6; an electromagnetic telescopic rod 7 is fixedly connected to the center position of the upper end of the fixing frame 6, and the movement of the electromagnetic telescopic rod 7 is controlled in real time by the evaporation system control center; a tension spring 8 is fixedly connected to the outer sleeve of the electromagnetic telescopic rod 7, and a liquid sealing plate 9 is fixedly connected to the upper end of the electromagnetic telescopic rod 7, and the liquid sealing plate 9 is slidably and sealingly connected to the bottom end of the conical cone 5.

[0044] As an embodiment of the present invention, the crystallizer 2 comprises:

[0045] A crystalline outer wall 10, wherein the crystalline outer wall 10 has a relatively high thickness and is made of a thermal insulation material with low thermal conductivity and low linear expansion coefficient, such as thermal insulation mortar;

[0046] The crystal inner wall 11 is relatively thin and made of a metal material with high thermal conductivity and low linear expansion coefficient, such as aluminum alloy;

[0047] As an embodiment of the present invention, the evaporation copper tube 12 of the refrigeration circuit 4 is surrounded in the gap between the crystal inner wall 11 and the crystal outer wall 10, and the evaporation copper tube 12 passes through the crystal outer wall 10 and is connected to the compression device 13 and the expansion valve 14 of the refrigeration circuit 4.

[0048] In the process of desalting high-salt wastewater through evaporation and concentration technology, taking the MVR mechanical vapor recompression process as an example, first, the high-salt wastewater is introduced into the evaporation concentrator through a connecting pipe, and then the high-salt wastewater is heated and flash evaporated, so that the water in the high-salt wastewater is separated from the mother liquor in the form of water vapor, and the concentration of the high-salt wastewater is increased, that is, the concentrated solution of the high-salt wastewater is obtained; as the concentration of the high-salt wastewater gradually increases, the salt components therein gradually reach the upper limit of their solubility at the current temperature, and crystallize out from the high-salt wastewater. In order to reduce the salt concentration of high-salt wastewater in the evaporation system as quickly as possible, the present invention uses an intermittent feeding method to treat the high-salt wastewater. When the high-salt wastewater in the evaporation separator 1 reaches the target water level, the water level monitor sends a signal to the evaporation system control center, and the control center closes the water inlet valve, so that the salt concentration of the high-salt wastewater in the evaporation separator 1 increases rapidly under the action of evaporation and concentration. When the concentration monitor in the evaporation separator 1 detects that the salt concentration of the high-salt wastewater is no longer increasing, it means that the high-salt wastewater in the evaporation separator 1 has reached a saturated state at this temperature. If evaporation and concentration continue, crystallized salt will be in the high-salt wastewater concentrate. Crystallization and precipitation; in order to prevent a large amount of crystalline salt from crystallizing and precipitating in the evaporation separator 1, and then mixing with the concentrated liquid and adhering to the inner wall of the evaporation separator 1, thereby having an adverse effect on the subsequent high-salt wastewater treatment, once it is detected that the salt concentration of the high-salt wastewater is no longer increasing, the control center immediately controls the electromagnetic telescopic rod 7, one end of which is fixed on the fixed frame 6 and the other end is fixed on the sealing plate 9, to be energized and extended upward, thereby driving the sealing plate 9 located at the bottom of the conical cone 5 to slide upward, so that the sealing effect of the sealing plate 9 and the conical cone 5 fails, exposing a gap, and the high-salt wastewater concentrate that has just reached the saturated state quickly flows downward along the surface of the conical cone 5, passes through the gap and falls into the crystallizer 2.

[0049] When the concentration monitor in the evaporation separator 1 detects that the salt concentration in the evaporation separator 1 is zero, it means that all the high-salt wastewater concentrate in the evaporation separator 1 has entered the crystallizer 2, so a signal is sent to the control center at this time, and the control center cuts off the power of the electromagnetic telescopic rod 7, so that the sealing plate 9 is quickly reset under the action of its own gravity and the tension of the tension spring 8, and the bottom end of the conical truncated cone 5 is re-sealed. After the sealing is completed, the control center can open the connecting pipe and introduce the high-salt wastewater to be treated again for evaporation and concentration treatment; in this process, the staff can understand the time for the sealing plate 9 to restore the seal, so that the control center delays the opening of the connecting pipe after cutting off the power of the electromagnetic telescopic rod 7, and can also set a pressure sensor at the sliding sealing position of the conical truncated cone 5 and the sealing plate 9, so that after the pressure sensor senses that the conical truncated cone 5 and the sealing plate 9 have completed the seal and sends a signal to the control center, the control center will open the connecting switch.

[0050] Since the evaporation copper tube 12 of the refrigeration circuit 4 is connected and fixed between the crystal inner wall and the crystal outer wall of the crystallizer 2 in the present invention, the temperature inside the crystallizer 2 is much lower than the temperature inside the evaporation separator 1 under the action of the gaseous low-temperature refrigerant in the evaporation copper tube 12. After the high-salt wastewater concentrate in the high-temperature saturated state in the evaporation separator 1 enters the low-temperature crystallizer 2, the solubility of the salt-containing component in the low-temperature environment decreases, and the salt in the high-salt wastewater quickly undergoes supersaturated crystallization and precipitation. After standing for a period of time until the detection result of the salt monitor in the crystallizer 2 no longer decreases and remains unchanged, it indicates that the salt-containing component in the high-salt wastewater has dropped to a level that meets the standards for subsequent biochemical treatment, thereby achieving the technical effect of rapidly and substantially reducing the salt content of the high-salt wastewater concentrate, avoiding repeated treatment of high-salt wastewater, and reducing the workload of the evaporation system.

[0051] As an embodiment of the present invention, the evaporation copper tube 12 is welded and fixed to the crystal inner wall 11, and the inner wall of the crystal inner wall 11 is evenly and fixedly connected with capillary copper tubes 15 arranged obliquely downward, and the capillary copper tubes 15 are encapsulated with phase change coolant.

[0052] During operation, in order to allow the high-salt wastewater entering the crystallizer 2 to be cooled more quickly and comprehensively, thereby quickly precipitating a large amount of crystallized salt, the evaporating copper tube 12 is fixedly connected to the crystallization inner wall 11 made of aluminum alloy, and the high thermal conductivity of the aluminum alloy is used to accelerate the heat exchange efficiency between the high-salt wastewater and the refrigerant in the evaporating copper tube 12 to a certain extent; further, the capillary copper tube 15 arranged obliquely downward is evenly fixedly connected to the inner wall of the crystallization inner wall 11, and a phase-change coolant is encapsulated therein, so that the high-salt wastewater located at the center can also participate in the heat exchange with the refrigerant in the evaporating copper tube 12, thereby achieving the technical effect of further improving the cooling speed of the high-salt wastewater with the help of the gas-liquid change of the phase-change coolant, and further accelerating the precipitation rate of the crystallized salt in the high-salt wastewater.

[0053] As an embodiment of the present invention, a water pumping pipe 16 is connected to the bottom of one side of the crystallizer 2, and the pipe mouth of the water pumping pipe 16 is fixedly connected to a solid-liquid filter plate 17, and the water pipe cross-section of the water pumping pipe 16 located inside the crystallizer 2 is an upward inclined conical design.

[0054] During operation, after the detection result of the salt monitor in the crystallizer 2 no longer decreases and remains unchanged, the control system turns on the pump connected to the pumping pipe 16 to extract the salt-containing wastewater that has completed the crystallization of the salt from the pumping pipe 16 at the bottom of the crystallized salt; in order to prevent the precipitated crystallized salt from flowing with the water flow, the solid-liquid filter plate 17 at the mouth of the pumping pipe 16 is blocked, and the mouth section of the pumping pipe 16 is designed to be an upwardly inclined conical structure. When the crystallized salt flows along the inclined mouth to the top under the action of the water flow, it will fall from the mouth, thereby avoiding the blockage of the pumping pipe 16 to a certain extent.

[0055] As an embodiment of the present invention, the bottom end of the crystallizer 2 is rotatably connected with evenly distributed electric-controlled blades 18, and a non-metallic insulation layer is fixedly bonded to the surface of the electric-controlled blades 18. When the electric-controlled blades 18 are rotated to the closest horizontal position, the crystallizer 2 and the dryer 3 can be sealed and isolated.

[0056] As an embodiment of the present invention, the side wall of the compression device 13 of the dryer 3 close to the refrigeration circuit 4 is evenly provided with hot air holes 19, and one end of the compression device 13 close to the hot air holes 19 is fixedly connected with a hot air pipe 20.

[0057] During operation, although the suction pipe 16 can drain most of the salt-containing wastewater in the crystallizer 2, on the one hand, there will inevitably be some residue in the crystallizer 2, and on the other hand, a layer of salt-containing wastewater will inevitably adhere to the surface of the crystallized salt. If it is not air-dried in time, when it leaves the crystallizer 2 and returns to normal temperature, the solubility will decrease, and the crystallized salt will inevitably be partially dissolved in the salt-containing wastewater on the surface, thereby causing the crystallized salt to adhere. Therefore, after the suction pipe 16 drains the salt-containing wastewater in the crystallizer 2, the control center starts the electric control blade 18 at the bottom of the crystallizer 2 to rotate it to a vertical position, thereby removing the crystallized salt in the crystallizer 2. The salt is poured into the dryer 3; a hot air hole 19 is opened at the compression device 13 of the dryer 3 near the refrigeration circuit 4. The heat emitted when the condenser in the compression device 13 condenses passes through the hot air hole 19 along the hot air pipe 20 and is blown into the dryer 3, so that the salt-containing wastewater on the surface of the crystallized salt in the dryer 3 is air-dried. It is worth pointing out that in order to prevent the temperature of the hot air blown out from the compression device 13 from being too high, which will cause the crystallized salt to dissolve, the hot air hole 1919 is not connected to the hot air pipe 2020, and there is a certain interval between them, so that the heat carried by the hot air blown out from the hot air pipe 20 will not all enter the dryer 3.

[0058] As an embodiment of the present invention, a ventilation hole 21 is opened at the bottom of the dryer 3, and a negative pressure fan 22 is rotatably connected to the inner wall of the bottom of the dryer 3. A filter baffle for only air to pass is provided at the upper end of the negative pressure fan 22, and the filter baffle is fixedly connected to the inner wall of the dryer 3.

[0059] During operation, the negative pressure fan 22 is rotated on the inner wall of the bottom of the dryer 3 to further ensure that the crystallized salt in the dryer 3 will not be dissolved by the hot air, and at the same time, the air circulation is accelerated, thereby improving the drying efficiency of the crystallized salt.

[0060] As an embodiment of the present invention, the bottom end of the crystallizer 2 and the top end of the dryer 3 are detachably connected.

[0061] During operation, by setting a detachable connection such as a snap connection or a threaded connection between the bottom end of the crystallizer 2 and the top end of the dryer 3, it is convenient to clean and transfer the crystallized salt that has been dried in the dryer 3.

[0062] The above shows and describes the basic principles, main features and significant advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. Without departing from the spirit and scope of the present invention, the present invention may also be modified and improved to adapt to different usage environments and customer needs. These modifications and improvements fall within the scope of protection of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An evaporation system with a refrigeration circuit, comprising: An evaporation separator (1), wherein the side wall of the evaporation separator (1) is provided with a plurality of connecting pipes and connecting flanges necessary for evaporating and separating water in high-salinity wastewater; It is characterized by further comprising: A crystallizer (2), wherein the top end of the crystallizer (2) is connected to the outer wall of the bottom end of the evaporation separator (1) via a crystallization flange; A dryer (3), the dryer (3) being located below the crystallizer (2), and the dryer (3) being used to promptly remove moisture from the surface of the crystallized salt; A refrigeration circuit (4) acts on the crystallizer (2) and the dryer (3) at the same time, and is used to improve the working efficiency of the crystallizer (2) and the dryer (3).

2. An evaporation system with a refrigeration circuit (4) according to claim 1, characterized in that: The bottom of the evaporation separator (1) is fixedly connected to a conical truncated cone (5) with an inwardly constricted opening; the bottom of the conical truncated cone (5) is fixedly connected to a cross-shaped fixing frame (6); an electromagnetic telescopic rod (7) is fixedly connected to the center position of the upper end of the fixing frame (6); a tension spring (8) is fixedly connected to the outer shell of the electromagnetic telescopic rod (7); the upper end of the electromagnetic telescopic rod (7) is fixedly connected to a liquid sealing plate (9), and the liquid sealing plate (9) is slidably and sealingly connected to the bottom end of the conical truncated cone (5).

3. An evaporation system with a refrigeration circuit (4) according to claim 1, characterized in that: The crystallizer (2) comprises: A crystalline outer wall (10), wherein the crystalline outer wall (10) has a relatively high thickness and is made of a thermal insulation material with low thermal conductivity and low linear expansion coefficient; The crystal inner wall (11) is relatively thin and is made of a metal material with high thermal conductivity and low linear expansion coefficient.

4. An evaporation system with a refrigeration circuit (4) according to claim 3, characterized in that: The evaporation copper tube (12) of the refrigeration circuit (4) is surrounded in the gap between the crystal inner wall (11) and the crystal outer wall (10), and the evaporation copper tube (12) passes through the crystal outer wall (10) and is connected to the compression device (13) and the expansion valve (14) of the refrigeration circuit (4).

5. An evaporation system with a refrigeration circuit (4) according to claim 4, characterized in that: The evaporation copper tube (12) is fixedly connected to the crystal inner wall (11), and the inner wall of the crystal inner wall (11) is evenly and fixedly connected with capillary copper tubes (15) arranged obliquely downward, and the capillary copper tubes (15) are all encapsulated with phase change cooling liquid.

6. An evaporation system with a refrigeration circuit (4) according to claim 3, characterized in that: A water extraction pipe (16) is passed through the bottom of one side of the crystallizer (2), the pipe mouth of the water extraction pipe (16) is fixedly connected to a solid-liquid filter plate (17), and the water pipe cross-section of the water extraction pipe (16) located inside the crystallizer (2) is designed to be upwardly inclined in a conical shape.

7. An evaporation system with a refrigeration circuit (4) according to claim 1, characterized in that: The bottom end of the crystallizer (2) is rotatably connected to electrically controlled blades (18) that are evenly distributed, and a non-metallic thermal insulation layer is fixedly bonded to the surface of the electrically controlled blades (18). When the electrically controlled blades (18) are rotated to the closest horizontal position, the crystallizer (2) and the dryer (3) can be sealed and isolated.

8. An evaporation system with a refrigeration circuit (4) according to claim 7, characterized in that: Hot air holes (19) are evenly arranged on the side wall of the compression device (13) of the dryer (3) close to the refrigeration circuit (4), and a hot air pipe (20) is fixedly connected to one end of the compression device (13) close to the hot air holes (19).

9. An evaporation system with a refrigeration circuit (4) according to claim 8, characterized in that: A ventilation hole (21) is provided at the bottom of the dryer (3); a negative pressure fan (22) is rotatably connected to the inner wall of the bottom of the dryer (3); a filter baffle (23) is provided at the upper end of the negative pressure fan (22); and the filter baffle (23) is fixedly connected to the inner wall of the dryer (3).

10. An evaporation system with a refrigeration circuit (4) according to claim 7, characterized in that: The bottom end of the crystallizer (2) and the top end of the dryer (3) are detachably connected.

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