Condensation crystallization system

Abstract

The utility model discloses a condensation crystallization system. The condensation crystallization system comprises an air inlet, an air outlet, a refrigeration module, a condensation module and a liquid discharge module, the condensation module comprises a plurality of condensation sub-modules, and each condensation sub-module comprises a condensation crystallizer; the air inlet ends of the condensation crystallizers of the plurality of condensation sub-modules are communicated with the air inlet, and the air outlet ends of the condensation crystallizers of the plurality of condensation sub-modules are communicated with the air outlet; a first switch valve is connected between the air inlet end and the air inlet of each condensation crystallizer; the refrigeration module is used for cooling the interior of the condensation crystallizer; the liquid discharging ends of the condensation crystallizers are all connected with the liquid discharging module, and the liquid discharging module is used for discharging liquid. By adopting the scheme, the problem that a channel is easily blocked during condensation is solved, meanwhile, shutdown waiting is avoided, and the production efficiency of a factory is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a condensation crystallization system. Background Art

[0002] During the drying process of new energy batteries, the vacuum pump needs to evacuate the gas in the high-temperature furnace within a short time. However, there is a very small amount of water and NMP solvent in the high-temperature gas. To improve production efficiency, it is necessary to condense and crystallize the water and NMP solvent in the high-temperature gas to make the high-temperature furnace reach a better vacuum degree.

[0003] During the condensation crystallization process, the gas channels in the condensation crystallizer are easily blocked, seriously affecting the condensation crystallization effect. Summary of the Utility Model

[0004] The utility model provides a condensation crystallization system to solve the problem that the gas channels are easily blocked.

[0005] According to one aspect of the utility model, a condensation crystallization system is provided. The condensation crystallization system includes an air inlet, an air outlet, a refrigeration module, a condensation module, and a liquid discharge module.

[0006] The condensation module includes a plurality of condensation sub-modules, and each of the plurality of condensation sub-modules includes a condensation crystallizer.

[0007] The air inlet ends of the condensation crystallizers of the plurality of condensation sub-modules are all communicated with the air inlet, and the air outlet ends of the condensation crystallizers of the plurality of condensation sub-modules are all communicated with the air outlet.

[0008] A first switching valve is connected between the air inlet end of each condensation crystallizer and the air inlet for detecting the air inlet pressure of the air inlet.

[0009] The refrigeration module is used to cool the inside of the condensation crystallizer.

[0010] The liquid discharge ends of the plurality of condensation crystallizers are all connected to the liquid discharge module, and the liquid discharge module is used to discharge liquid.

[0011] In an alternative embodiment of the utility model, the condensation module further includes an air inlet pressure detection component and an air outlet pressure detection component. The air inlet pressure detection component is connected between the air inlet and the first switching valve for detecting the air inlet pressure of the air inlet.

[0012] An air outlet pressure detection component, the air outlet pressure detection component is connected between the air outlet end of the condensation crystallizer and the air outlet for detecting the air outlet pressure of the air outlet.

[0013] In an alternative embodiment of the utility model, the condensation module further includes at least one of the following:

[0014] An intake air temperature detector, which is connected between the intake port and the first switching valve and is used to detect the intake air temperature of the intake port;

[0015] An outlet air temperature detector, which is connected between the outlet end of the condensation crystallizer and the outlet port and is used to detect the outlet air temperature of the outlet port;

[0016] A condensation temperature detector, which is internally communicated with the condensation crystallizer and is used to detect the internal temperature of the condensation crystallizer;

[0017] A first one-way valve, which is connected between the liquid discharge end of the condensation crystallizer and the liquid discharge module, and the first one-way valve is used to allow liquid to flow from the liquid discharge end of the condensation crystallizer to the liquid discharge module.

[0018] In an alternative embodiment of the present invention, the liquid discharge module includes a recovery tank, a circulation pump, a second switching valve and a liquid discharge port;

[0019] The liquid inlet end of the recovery tank is communicated with the liquid discharge end of the condensation crystallizer, and the liquid outlet end of the recovery tank is communicated with the liquid discharge port;

[0020] The circulation pump and the second switching valve are both connected between the liquid outlet end of the recovery tank and the liquid discharge port.

[0021] In an alternative embodiment of the present invention, the liquid discharge module further includes at least one of the following:

[0022] A liquid level detector, which is connected to the recovery tank and is used to detect the liquid level height in the recovery tank;

[0023] A second one-way valve, which is connected between the recovery tank and the liquid discharge port, and the second one-way valve is used to allow liquid to flow from the recovery tank to the liquid discharge port.

[0024] In an alternative embodiment of the present invention, the refrigeration module includes a cascade refrigeration unit.

[0025] In an alternative embodiment of the present invention, the cascade refrigeration unit includes a primary refrigeration unit and a secondary refrigeration unit;

[0026] The primary refrigeration unit includes a first compressor, a first oil separator, a first water-cooled condenser, a first flow switch, a first liquid storage tank, a first dryer filter, a regenerator, a third switching valve, and an evaporative condenser. The first compressor, the first oil separator, the first water-cooled condenser, the first flow switch, the first liquid storage tank, the first dryer filter, the regenerator, the third switching valve, and the evaporative condenser are sequentially connected through pipelines to form a first refrigeration circuit;

[0027] The secondary refrigeration unit includes a second compressor, a second water-cooled condenser, a second oil separator, a second dryer filter, and a fourth switching valve. The second compressor, the second water-cooled condenser, the second oil separator, the second dryer filter, the regenerator, the fourth switching valve, and the evaporative condenser are sequentially connected to form a second refrigeration circuit.

[0028] In an alternative embodiment of the present invention, the refrigeration module further includes a cooling water inlet, a cooling water outlet, a cooling water inlet pipeline, and a cooling water outlet pipeline;

[0029] The cooling water inlet ends of the first water-cooled condenser and the second water-cooled condenser are both connected to the cooling water inlet through the cooling water inlet pipeline;

[0030] The cooling water outlet ends of the second water-cooled condenser and the second water-cooled condenser are both connected to the cooling water outlet through the cooling water outlet pipeline;

[0031] The first flow switch is disposed in the cooling water inlet pipeline and / or the cooling water outlet pipeline.

[0032] In an alternative embodiment of the present invention, the primary refrigeration unit further includes at least one of the following:

[0033] A first pressure detection component, which is connected between the first compressor and the first oil separator;

[0034] A first temperature detection component, which is connected between the first compressor and the first oil separator;

[0035] A second pressure detection component, which is connected between the first compressor and the evaporative condenser;

[0036] A second temperature detection component, which is connected between the first compressor and the evaporative condenser.

[0037] In an alternative embodiment of the present invention, the secondary refrigeration unit further includes at least one of the following:

[0038] The third temperature detector, which is connected between the second compressor and the regenerator;

[0039] The third pressure detector, which is connected between the second compressor and the evaporative condenser;

[0040] The fourth temperature detector, which is connected between the second compressor and the evaporative condenser;

[0041] The defrosting valve, which is connected between the second compressor and the fourth switching valve;

[0042] The buffer tank, the inlet of which is connected to the regenerator, the outlet of which is connected to the evaporative condenser, and a right-angle valve and a relief valve are connected between the outlet of the buffer tank and the evaporative condenser.

[0043] In the technical solution of the embodiment of the present invention, by providing a plurality of condensation sub-modules, each of the plurality of condensation sub-modules includes a condensation crystallizer; at the same time, the intake ends of the condensation crystallizers of the plurality of condensation sub-modules are all communicated with the intake port, and the outlet ends of the condensation crystallizers of the plurality of condensation sub-modules are all communicated with the outlet port; a first switching valve is connected between the intake end of each condensation crystallizer and the intake port. Thus, it is possible to switch to different condensation sub-modules for condensation through the opening and closing of the first switching valve, enabling at least one set of condensation sub-modules to normally carry out condensation work, and at least one set of condensation sub-modules discharging the liquid to the liquid discharge module for recovery, avoiding the problem that the condensation channel is easily blocked when only one set of condensation sub-modules continuously carries out condensation work, solving the problem that the channel is easily blocked during condensation, and at the same time avoiding downtime waiting, greatly improving the production efficiency of the factory.

[0044] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 FIG. is a schematic structural diagram of a condensation crystallization system provided according to an embodiment of the present invention.

[0047] Wherein: 1. Air inlet; 2. Air outlet; 3. Refrigeration module; 31. First compressor; 32. First oil separator; 33. First water-cooled condenser; 34. First flow switch; 35. First liquid storage tank; 36. First dryer filter; 37. Regenerator; 38. Third switching valve; 39. Evaporative condenser; 310. Second compressor; 311. Second water-cooled condenser; 312. Second oil separator; 313. Second dryer filter; 314. Fourth switching valve; 315. Cooling water inlet; 316. Cooling water outlet; 317. Cooling water inlet pipeline; 318. Cooling water outlet pipeline; 319. First pressure detector; 320. First temperature detector; 321. Second pressure detector; 322. Second temperature detector; 323. Third pressure detector; 324. Third temperature detector; 326. Fourth temperature detector; 327. Defrosting valve; 328. Buffer tank; 329. Angle valve; 330. Unloading valve; 4. Condensation module; 41. Condensation sub-module; 411. Condensation crystallizer; 42. First switching valve; 43. Inlet air pressure detector; 44. Outlet air pressure detector; 45. Inlet air temperature detector; 46. Outlet air temperature detector; 47. Condensation temperature detector; 48. First check valve; 5. Liquid drainage module; 51. Recovery tank; 52. Circulation pump; 53. Second switching valve; 54. Liquid drainage port; 55. Liquid level detector; 56. Second check valve. Detailed implementation manners

[0048] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0050] An embodiment of the present utility model provides a condensation crystallization system, which is used for condensing high-temperature gas. In some embodiments, the condensation crystallization system is used for condensing and crystallizing water and NMP solvent in the high-temperature gas during the drying process of new energy batteries. In some embodiments, the condensation crystallization system is used for condensing and recovering oil and gas. In this embodiment, the condensation crystallization system condensing the high-temperature gas during the drying process of new energy batteries is taken as an example. As Figure 1 shown, the condensation crystallization system includes an air inlet 1, an air outlet 2, a refrigeration module 3, a condensation module 4, and a liquid discharge module 5.

[0051] The condensation module 4 includes a plurality of condensation sub-modules 41, and each of the plurality of condensation sub-modules 41 includes a condensation crystallizer 411. Among them, the condensation sub-module 41 is a module for condensing high-temperature gas, and the condensation crystallizer 411 is a device that crystallizes by condensation, mainly used for separating crystals from liquids, and can also be used for separating liquids from gases. It can be understood that the specific number of the condensation sub-modules 41 can be set according to user needs. In this embodiment, the number of the condensation sub-modules 41 is taken as two for example.

[0052] The inlet ends of the condensation crystallizers 411 of the plurality of condensation sub-modules 41 are all communicated with the air inlet 1, and the outlet ends of the condensation crystallizers 411 of the plurality of condensation sub-modules 41 are all communicated with the air outlet 2. The air inlet 1 is the inlet of the high-temperature gas to be condensed, and the air outlet 2 is the outlet of the gas after condensation. A first switch valve 42 is connected between the inlet end of each condensation crystallizer 411 and the air inlet 1. That is, each condensation sub-module 41 forms a condensation channel, and each condensation channel has a first switch valve 42 to control the opening and closing of the condensation channel. When the first switch valve 42 is opened, the gas entering from the air inlet 1 will enter the condensation crystallizer 411 in the condensation channel where the first switch valve 42 is located for condensation. When the first switch valve 42 is closed, the gas entering from the air inlet 1 cannot enter the condensation crystallizer 411 in the condensation channel where the first switch valve 42 is located for condensation.

[0053] The inlet end of the condensation crystallizer 411 is communicated with the air inlet 1 through a pipeline. The first switch valve 42 is a valve that can control the pipeline channel. In some embodiments, the first switch valve 42 is a solenoid valve. By connecting the first switch valve 42, which is a solenoid valve, to the pipeline between the inlet end of the condensation crystallizer 411 and the air inlet 1, the first switch valve 42 can control the gas entering from the air inlet 1 to enter or not enter the condensation crystallizer 411.

[0054] The refrigeration module 3 is used to cool the interior of the condensation crystallizer 411. Among them, the refrigeration module 3 refers to a module that can cool the interior of the condensation crystallizer 411. By making the interior of the condensation crystallizer 411 have a lower temperature, the condensation crystallizer 411 can condense the high-temperature gas entering its interior. In some embodiments, the refrigeration module 3 includes a cascade refrigeration unit. Among them, the cascade refrigeration unit uses a multi-stage refrigeration method, which can achieve higher refrigeration efficiency and lower working temperature, thereby saving energy and reducing costs. At the same time, the lower working temperature can make the interior temperature of the condensation crystallizer 411 lower, facilitating the attainment of the saturation concentration of the substances to be condensed in the high-temperature gas.

[0055] The liquid discharge ends of multiple condensation crystallizers 411 are all connected to the liquid discharge module 5, and the liquid discharge module 5 is used to discharge liquid. Among them, after the condensation crystallizer 411 condenses the gas, liquid will be generated, and this liquid can be discharged through the liquid discharge module 5.

[0056] When the amount of condensation crystallization in a condensation sub-module 41 is too large, the channel will be blocked, affecting the subsequent effect; at the same time, the liquid after condensation crystallization also needs to be recovered. In the above solution, by setting multiple condensation sub-modules 41, multiple condensation sub-modules 41 all include condensation crystallizers 411; at the same time, the intake ends of the condensation crystallizers 411 of multiple condensation sub-modules 41 are all connected to the intake port 1, and the outlet ends of the condensation crystallizers 411 of multiple condensation sub-modules 41 are all connected to the outlet port 2; a first switching valve 42 is connected between the intake end of each condensation crystallizer 411 and the intake port 1. Thus, it is possible to switch to different condensation sub-modules 41 for condensation through the on-off of the first switching valve 42, enabling at least one group of condensation sub-modules 41 to normally carry out condensation work, and at least one group of condensation sub-modules 41 discharging the liquid to the liquid discharge module 5 for recovery, avoiding the problem that the condensation channel is easily blocked when only one group of condensation sub-modules 41 continuously carries out condensation work, solving the problem that the channel is easily blocked during condensation, and at the same time avoiding downtime waiting, greatly improving the production efficiency of the factory.

[0057] In an alternative embodiment of the present utility model, as Figure 1 shown, the condensation module 4 further includes an intake pressure detection member 43 and an outlet pressure detection member 44. The intake pressure detection member 43 is connected between the intake port 1 and the first switching valve 42 and is used to detect the intake pressure of the intake port 1; the outlet pressure detection member 44, the outlet pressure detection member 44 is connected between the outlet end of the condensation crystallizer 411 and the outlet port 2 and is used to detect the outlet pressure of the outlet port 2.

[0058] Among them, the intake pressure detection member 43 and the outlet pressure detection member 44 refer to components that can monitor the pressure value. The intake pressure refers to the pressure during the intake process, and the outlet pressure refers to the pressure during the outlet process.

[0059] In some embodiments, the intake pressure detection component 43 includes a pressure transmitter, which is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electric signals. Therefore, the pressure transmitter can monitor the pressure value. By arranging the intake pressure detection component 43 between the intake port 1 and the first switching valve 42, the intake pressure can be detected. In some embodiments, the outlet pressure detection component 44 includes a pressure transmitter. By connecting the outlet pressure detection component 44 between the outlet end of the condensation crystallizer 411 and the outlet port 2, the outlet pressure can be detected. It can be understood that in other embodiments, the intake pressure detection component 43 and the outlet pressure detection component 44 may also include components for detecting pressure such as pressure sensors and pressure gauges, which are not specifically limited here and are only for illustration purposes.

[0060] When the amount of condensation crystallization in the condensation crystallizer 411 is relatively large, it is easy to block the condensation channel. When the condensation channel is blocked, the pressure difference between the intake pressure and the outlet pressure will be relatively large. Therefore, by knowing the intake pressure and the outlet pressure, it is possible to timely know whether the current condensation channel is blocked, so as to timely switch the condensation crystallizer 411 for condensation crystallization.

[0061] In an alternative embodiment of the present utility model, the condensation module 4 further includes an intake temperature detection component 45, which is connected between the intake port 1 and the first switching valve 42 and is used to detect the intake temperature of the intake port 1. Among them, the intake temperature detection component 45 refers to a component that can monitor the temperature value, and the intake temperature refers to the temperature during the intake process. In some embodiments, the intake temperature detection component 45 includes a temperature sensor. By arranging the intake temperature detection component 45 between the intake port 1 and the first switching valve 42, the intake temperature can be conveniently detected.

[0062] In an alternative embodiment of the present utility model, as Figure 1 shown, the condensation module 4 further includes an outlet temperature detection component 46, which is connected between the outlet end of the condensation crystallizer 411 and the outlet port 2 and is used to detect the outlet temperature of the outlet port 2. Among them, the outlet temperature detection component 46 refers to a component that can monitor the temperature value, and the outlet temperature refers to the temperature during the outlet process. In some embodiments, the outlet temperature detection component 46 includes a temperature sensor. By arranging the outlet temperature detection component 46 between the outlet end of the condensation crystallizer 411 and the outlet port 2, the outlet temperature can be conveniently detected. Since when condensing a substance, the substance usually has a corresponding condensation temperature point, by detecting the outlet temperature, it is possible to assist the staff in determining the condensation effect.

[0063] In an alternative embodiment of the present utility model, the condensation module 4 further includes a condensation temperature detector 47. The condensation temperature detector 47 is internally connected to the condensation crystallizer 411 and is used to detect the internal temperature of the condensation crystallizer 411. Among them, the condensation temperature detector 47 refers to a component that can monitor the temperature. In some embodiments, the condensation temperature detector 47 includes a temperature sensor, so that the temperature can be conveniently detected. Since the high-temperature gas condenses and crystallizes inside the condensation crystallizer 411, the substances to be condensed in the high-temperature gas usually have corresponding temperature points for condensation. By detecting the internal temperature of the condensation crystallizer 411, it is convenient to judge whether the corresponding temperature point is reached inside the condensation crystallizer 411, which is beneficial to improving the condensation effect and achieving the effect of removing a very small amount of water and NMP solvent in the high-temperature gas.

[0064] In an alternative embodiment of the present utility model, the outside of the condensation crystallizer 411 is a metal sleeve, and a set of finned heat exchangers is provided inside. The finned heat exchanger is one of the most widely used heat exchange devices in gas-liquid heat exchangers. It achieves the purpose of enhancing heat transfer by adding fins to ordinary base tubes. The high-temperature gas inside the condensation crystallizer 411 exchanges heat with the cold fluid of the refrigeration module 3 through the finned heat exchanger, realizing the cooling of the high-temperature gas inside the condensation crystallizer 411.

[0065] In an alternative embodiment of the present utility model, as Figure 1 shown, the condensation module 4 further includes a first check valve 48. The first check valve 48 is connected between the liquid discharge end of the condensation crystallizer 411 and the liquid discharge module 5. The first check valve 48 is used to allow the liquid to flow from the liquid discharge end of the condensation crystallizer 411 to the liquid discharge module 5. Among them, the first check valve 48 is a valve through which the fluid can only flow along the water inlet, and the medium at the water outlet cannot flow back. The water inlet of the first check valve 48 is connected to the liquid discharge end of the condensation crystallizer 411, and the water outlet of the first check valve 48 is connected to the liquid discharge module 5. Thus, the liquid inside the condensation crystallizer 411 can flow to the liquid discharge module 5, while the liquid in the liquid discharge module 5 cannot flow back into the condensation crystallizer 411, preventing the liquid from backflowing into the condensation crystallizer 411 and affecting the condensation effect.

[0066] In an alternative embodiment of the present utility model, the liquid discharge module 5 includes a recovery tank 51, a circulation pump 52, a second switching valve 53, and a liquid discharge port 54; the liquid inlet end of the recovery tank 51 is connected to the liquid discharge end of the condensation crystallizer 411 through a pipeline. Therefore, the liquid condensed by the condensation crystallizer 411 will be discharged into the recovery tank 51. The liquid outlet end of the recovery tank 51 is connected to the liquid discharge port 54 through a pipeline, and the liquid discharge port 54 can be connected to the public pipeline in the production workshop for unified recovery. The circulation pump 52 and the second switching valve 53 are both connected to the pipeline between the liquid outlet end of the recovery tank 51 and the liquid discharge port 54. Preferably, the second switching valve 53 is a solenoid valve. Therefore, when the circulation pump 52 is started and the second switching valve 53 is opened, the liquid in the recovery tank 51 will be discharged through the liquid discharge port 54.

[0067] In an alternative embodiment of the present utility model, as Figure 1 shown, the liquid discharge module 5 further includes a liquid level detection component 55. The liquid level detection component 55 is connected to the recovery tank 51 and is used to detect the liquid level height in the recovery tank 51. Among them, the liquid level detection component 55 refers to a component that can monitor the liquid level height. By detecting the liquid level height, the opening and closing of the second switching valve 53 and the start and stop of the circulation pump 52 can be automatically controlled according to the liquid level height, and the liquid in the recovery tank 51 can be discharged, reducing the manual monitoring and operation processes, enabling full-day operation, and further improving the automation level of the factory.

[0068] Preferably, the liquid level detection component 55 includes a liquid level transmitter. The liquid level transmitter is an extension and development of the pressure transmitter technology. According to the principle that the pressure generated by liquids with different specific gravities at different heights is linearly related, it can accurately measure and transmit the volume, liquid height, and weight of water, oil, and pastes. Therefore, through the liquid level transmitter, the liquid level height in the recovery tank 51 can be monitored. It can be understood that in other embodiments, the liquid level detection component 55 may also include components such as liquid level sensors for detecting the liquid level height, which are not specifically limited herein.

[0069] In an alternative embodiment of the present utility model, as Figure 1 shown, the liquid discharge module 5 further includes a second check valve 56. The second check valve 56 is connected between the recovery tank 51 and the liquid discharge port 54, and the second check valve 56 is used to allow the liquid to flow from the recovery tank 51 to the liquid discharge port 54. Among them, the second check valve 56 is a valve through which the fluid can only flow along the inlet, and the medium at the outlet cannot flow back. The inlet of the second check valve 56 is connected to the recovery tank 51, and the outlet of the second check valve is connected to the liquid discharge port 54. Thus, the liquid inside the recovery tank 51 can flow to the liquid discharge port 54, and the liquid discharged from the liquid discharge port 54 cannot flow back into the recovery tank 51, preventing the liquid from flowing back into the recovery tank 51.

[0070] In an alternative embodiment of the present utility model, as Figure 1As shown in the figure, the cascade refrigeration unit includes a primary refrigeration unit and a secondary refrigeration unit; the primary refrigeration unit includes a first compressor 31, a first oil separator 32, a first water-cooled condenser 33, a first flow switch 34, a first liquid storage tank 35, a first dryer filter 36, a regenerator 37, a third switching valve 38 and an evaporative condenser 39. The first compressor 31, the first oil separator 32, the first water-cooled condenser 33, the first flow switch 34, the first liquid storage tank 35, the first dryer filter 36, the regenerator 37, the third switching valve 38 and the evaporative condenser 39 are connected in sequence through pipelines to form a first refrigeration circuit.

[0071] Among them, the main function of the first liquid storage tank 35 is to store the refrigerant and maintain the normal operation of the refrigeration system. The main function of the first oil separator 32 is to separate the lubricating oil in the high-pressure steam discharged by the first compressor 31 to ensure the safe and efficient operation of the device. The function of the first compressor 31 is to compress the low-pressure refrigerant gas into a high-pressure gas, increase the temperature of the refrigerant gas, and transfer the high-pressure refrigerant gas to other refrigeration cycle components to complete the refrigeration cycle. The first flow switch 34 is used to control the entry and stop of the cooling water. The first dryer filter 36 is specifically used to remove moisture and humidity, and it can effectively keep the primary refrigeration unit dry and stable. The regenerator 37 is a heat exchange device. The evaporative condenser is the main heat exchange device in the refrigeration system, and its principle of action is as follows: the superheated high-pressure refrigerant gas discharged by the compressor in the refrigeration system passes through the condensation pipes in the evaporative condenser, so that the high-temperature gaseous refrigerant exchanges heat with the sprayed water and air outside the pipes. That is, the gaseous refrigerant enters the pipes from the upper opening and is gradually condensed into a liquid refrigerant from top to bottom. The third switching valve 38 refers to a valve used to control the on-off of the first refrigeration circuit. Preferably, the third switching valve 38 includes an electronic expansion valve.

[0072] The secondary refrigeration unit includes a second compressor 310, a second water-cooled condenser 311, a second oil separator 312, a second dryer filter 313 and a fourth switching valve 314. The second compressor 310, the second water-cooled condenser 311, the second oil separator 312, the second dryer filter 313, the regenerator 37, the fourth switching valve 314 and the evaporative condenser 39 are connected in sequence to form a second refrigeration circuit. The function of the second compressor 310 is to compress the low-pressure refrigerant gas into a high-pressure gas, increase the temperature of the refrigerant gas, and transfer the high-pressure refrigerant gas to other refrigeration cycle components to complete the refrigeration cycle. The main function of the second oil separator 312 is to separate the lubricating oil in the high-pressure steam discharged by the second compressor 310 to ensure the safe and efficient operation of the device. The second dryer filter 313 is specifically used to remove moisture and humidity, and it can effectively keep the secondary refrigeration unit dry and stable. The fourth switching valve 314 refers to a valve used to control the on-off of the second refrigeration circuit. Preferably, the fourth switching valve 314 includes an electronic expansion valve.

[0073] In an embodiment, the evaporative condenser 39 includes a first heat exchange channel and a second heat exchange channel. The first heat exchange channel is connected to the first refrigeration circuit, and the second heat exchange channel is connected to the second refrigeration circuit.

[0074] Both the first water-cooled condenser 33 and the second water-cooled condenser 311 are used for heat exchange with cooling water to cool down the refrigerant. Both the first water-cooled condenser 33 and the second water-cooled condenser 311 include a first channel and a second channel. The first channel of the first water-cooled condenser 33 is connected to the first refrigeration circuit, and the first channel of the second water-cooled condenser 311 is connected to the second refrigeration circuit. The second channels of both the first water-cooled condenser 33 and the second water-cooled condenser 311 are for the cooling water to flow through.

[0075] The high-temperature and high-pressure refrigerant discharged from the first compressor 31 exchanges heat with the cooling water in the first water-cooled condenser 33 to cool down, and then the refrigerant enters the evaporative condenser 39 through the third switching valve 38, exchanges heat with the refrigerant of the secondary refrigeration unit in the evaporative condenser 39, and then returns to the first compressor 31. The high-temperature and high-pressure refrigerant discharged from the second compressor 310 exchanges heat with the cooling water in the second water-cooled condenser 311 to cool down, then flows to the evaporative condenser 39, exchanges heat with the refrigerant in the first refrigeration circuit in the evaporative condenser 39 to further cool down, then flows to the regenerator 37 to exchange heat with the gas inside the condensation crystallizer 411, so that the temperature inside the condensation crystallizer 411 is reduced, and finally flows back to the second compressor 310.

[0076] In an alternative embodiment of the present invention, as Figure 1 shown, the refrigeration module 3 further includes a cooling water inlet 315, a cooling water outlet 316, a cooling water inlet pipeline 317, and a cooling water outlet pipeline 318; the cooling water inlet ends of both the first water-cooled condenser 33 and the second water-cooled condenser 311 are connected to the cooling water inlet 315 through the cooling water inlet pipeline 317; the cooling water outlet ends of both the second water-cooled condenser 311 and the second water-cooled condenser 311 are connected to the cooling water outlet 316 through the cooling water outlet pipeline 318. The cooling water inlet end and the cooling water outlet end are the two ends of the second channel of both the first water-cooled condenser 33 and the second water-cooled condenser 311; the first flow switch 34 is disposed on the cooling water inlet pipeline 317 and / or the cooling water outlet pipeline 318. Through the above solution, the cooling water can enter the first water-cooled condenser 33 and the second water-cooled condenser 311 to exchange heat with the refrigerant.

[0077] In an alternative embodiment of the present invention, as Figure 1As shown, the primary refrigeration unit further includes a first pressure detector 319, which is connected between the first compressor 31 and the first oil separator 32; wherein, the first pressure detector 319 refers to a component capable of monitoring pressure. Preferably, the first pressure detector 319 includes a pressure transmitter, so as to be able to monitor the pressure of the refrigerant discharged from the first compressor 31.

[0078] In an alternative embodiment of the present invention, as Figure 1 shown, the primary refrigeration unit further includes a first temperature detector 320, which is connected between the first compressor 31 and the first oil separator 32; wherein, the first temperature detector 320 refers to a component capable of monitoring temperature. Preferably, the first temperature detector 320 includes a temperature sensor, so as to be able to monitor the temperature of the refrigerant discharged from the first compressor 31.

[0079] In an alternative embodiment of the present invention, the primary refrigeration unit further includes a second pressure detector 321, which is connected between the first compressor 31 and the evaporative condenser 39; wherein, the second pressure detector 321 refers to a component capable of monitoring pressure. Preferably, the second pressure detector 321 includes a pressure transducer, so as to be able to monitor the pressure of the refrigerant entering the first compressor 31.

[0080] In an alternative embodiment of the present invention, the primary refrigeration unit further includes a second temperature detector 322, which is connected between the first compressor 31 and the evaporative condenser 39. Wherein, the second temperature detector 322 refers to a component capable of monitoring temperature. Preferably, the second temperature detector 322 includes a temperature sensor, so as to be able to monitor the temperature of the refrigerant entering the first compressor 31.

[0081] In an alternative embodiment of the present invention, as Figure 1 shown, the secondary refrigeration unit further includes a third temperature detector 324, which is connected between the second compressor 310 and the regenerator 37; wherein, the third temperature detector 324 refers to a component capable of monitoring temperature. Preferably, the third temperature detector 324 includes a temperature sensor, so as to be able to monitor the temperature of the refrigerant entering the second compressor 310.

[0082] In an alternative embodiment of the present invention, the secondary refrigeration unit further includes a third pressure detector 323, which is connected between the second compressor 310 and the evaporative condenser 39; wherein, the third pressure detector 323 is used to detect pressure. Preferably, the third pressure detector 323 includes a pressure transmitter, so as to be able to monitor the pressure of the refrigerant discharged from the second compressor 310.

[0083] In an alternative embodiment of the present utility model, as Figure 1 shown, the secondary refrigeration unit further includes a fourth temperature detector 326, which is connected between the second compressor 310 and the evaporative condenser 39; wherein, the fourth temperature detector 326 is used to detect the temperature. Preferably, the fourth temperature detector 326 includes a temperature sensor, so as to be able to monitor the temperature of the refrigerant discharged by the second compressor 310.

[0084] In an alternative embodiment of the present utility model, as Figure 1 shown, the secondary refrigeration unit further includes a defrosting valve 327, which is connected between the second compressor 310 and the fourth switching valve 314; wherein, when the second compressor 310 stops working, frost will form in the evaporative condenser 39. In order to avoid excessive frost affecting the refrigeration effect, a defrosting operation is required. During defrosting, the defrosting valve 327 needs to be opened so that the refrigerant flows through the evaporative condenser 39 under the exhaust pressure of the second compressor 310, melts the frost in the evaporative condenser 39, and finally flows back to the second compressor 310.

[0085] In an alternative embodiment of the present utility model, as Figure 1 shown, the secondary refrigeration unit further includes a buffer tank 328. The inlet of the buffer tank 328 is connected to the regenerator 37, and the outlet of the buffer tank 328 is connected to the evaporative condenser 39. A right-angle valve 329 and a relief valve 330 are connected between the outlet of the buffer tank 328 and the evaporative condenser 39. Wherein, a certain amount of refrigerant is contained in the buffer tank 328, which can absorb or release a certain amount of refrigerant, avoiding too high or too low refrigerant pressure caused by insufficient or excessive refrigerant flow during the refrigeration or shutdown process of the refrigeration module 3. When the refrigeration module 3 is in an operating state, the refrigerant pressure in the high-pressure chamber of the buffer tank 328 will increase, while the refrigerant in the low-pressure chamber is restricted by the partition of the high-pressure chamber and cannot flow freely, thus playing a role in smooth refrigeration. When the refrigeration module 3 is in a shutdown state, the refrigerant in the buffer tank 328 can flow into the high-pressure chamber, relieving the pressure in the refrigeration module 3 and avoiding damage to the refrigeration module 3 caused by too high or too low pressure. The right-angle valve 329 and the relief valve 330 are used to control the outflow and stop of the refrigerant in the buffer tank 328.

[0086] In summary, the primary refrigeration unit and the secondary refrigeration unit can keep the temperature in the condensation crystallizer 411 relatively low, achieving ultra-low temperature refrigeration of -85°C, with extremely low water and NMP solvent content. They can cool the extremely low content of water and NMP solvent in the high-temperature gas to the temperature point corresponding to their saturation concentration, thereby achieving the effect of removing the extremely low content of water and NMP solvent in the high-temperature gas.

[0087] In addition, if there is too much condensation crystallization in the condensation crystallization system, the condensation channel will be blocked, affecting the subsequent effects. At the same time, the water and NMP solvent from the condensation crystallization also need to be recycled. The present utility model can switch to different condensation sub-modules 41 for condensation by opening and closing the first switching valve 42, enabling at least one group of condensation sub-modules 41 to normally carry out the condensation work. At least one group of condensation sub-modules 41 discharges the liquid to the liquid discharge module 5 for recycling, avoiding the problem that the condensation channel is easily blocked when only one group of condensation sub-modules 41 continuously carries out the condensation work, solving the problem that the channel is easily blocked during condensation, and at the same time avoiding downtime waiting, greatly improving the production efficiency of the factory.

[0088] Meanwhile, the present utility model has an automatic liquid discharge and recycling function. By detecting the liquid level height through the liquid level detection member 55, the opening and closing of the second switching valve 53 and the start and stop of the circulation pump 52 can be automatically controlled according to the liquid level height, discharging the liquid in the recovery tank 51, reducing the manual monitoring and operation processes, enabling full-day operation, and further improving the automation level of the factory.

[0089] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in the present utility model can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present utility model can be achieved. No limitations are imposed herein.

[0090] The above specific embodiments do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A condensation crystallization system, characterized in that: It includes an air inlet, an air outlet, a refrigeration module, a condensation module and a drainage module; The condensation module includes a plurality of condensation submodules, and each of the plurality of condensation submodules includes a condensation crystallizer; The air inlet ends of the condensation crystallizers of the plurality of condensation submodules are all connected to the air inlet, and the air outlet ends of the condensation crystallizers of the plurality of condensation submodules are all connected to the air outlet; A first switch valve is connected between the air inlet end of each condensation crystallizer and the air inlet; The refrigeration module is used to cool the interior of the condensation crystallizer; The discharge ends of the plurality of condensation crystallizers are all connected to the discharge module, and the discharge module is used to discharge liquid.

2. The condensation crystallization system according to claim 1, characterized in that: The condensing module further includes an inlet pressure detection component and an outlet pressure detection component, wherein the inlet pressure detection component is connected between the air inlet and the first switch valve and is used to detect the inlet pressure of the air inlet; An outlet pressure detection component is connected between the outlet end of the condensation crystallizer and the outlet port, and is used to detect the outlet pressure of the outlet port.

3. The condensation crystallization system according to claim 1, characterized in that: The condensation module further includes at least one of the following: an intake air temperature detection element, the intake air temperature detection element being connected between the air inlet and the first switch valve and being used to detect the intake air temperature of the air inlet; An outlet gas temperature detection component, the outlet gas temperature detection component is connected between the outlet end of the condensation crystallizer and the outlet port, and is used to detect the outlet gas temperature of the outlet port; A condensation temperature detection element, the condensation temperature detection element is connected to the interior of the condensation crystallizer and is used to detect the internal temperature of the condensation crystallizer; A first one-way valve, wherein the first one-way valve is connected between the discharge end of the condensation crystallizer and the discharge module, and the first one-way valve is used to allow liquid to flow from the discharge end of the condensation crystallizer to the discharge module.

4. The condensation crystallization system according to any one of claims 1 to 3, characterized in that: The liquid discharge module comprises a recovery tank, a circulation pump, a second switch valve and a liquid discharge port; The liquid inlet end of the recovery tank is connected to the liquid discharge end of the condensation crystallizer, and the liquid outlet end of the recovery tank is connected to the liquid discharge port; The circulation pump and the second switch valve are both connected between the liquid outlet of the recovery tank and the liquid discharge port.

5. The condensation crystallization system according to claim 4, characterized in that: The drainage module further includes at least one of the following: A liquid level detection component, which is connected to the recovery tank and is used to detect the liquid level height in the recovery tank; A second one-way valve is connected between the recovery tank and the liquid discharge port, and is used to allow liquid to flow from the recovery tank to the liquid discharge port.

6. The condensation crystallization system according to any one of claims 1 to 3, characterized in that: The refrigeration module includes a cascade refrigeration unit.

7. The condensation crystallization system according to claim 6, characterized in that: The cascade refrigeration unit comprises a primary refrigeration unit and a secondary refrigeration unit; The primary refrigeration unit comprises a first compressor, a first oil separator, a first water-cooled condenser, a first flow switch, a first liquid storage tank, a first drying filter, a regenerator, a third switch valve and an evaporative condenser, wherein the first compressor, the first oil separator, the first water-cooled condenser, the first flow switch, the first liquid storage tank, the first drying filter, the regenerator, the third switch valve and the evaporative condenser are sequentially connected through pipelines to form a first refrigeration circuit; The secondary refrigeration unit includes a second compressor, a second water-cooled condenser, a second oil separator, a second drying filter and a fourth switch valve. The second compressor, the second water-cooled condenser, the second oil separator, the second drying filter, the regenerator, the fourth switching valve and the evaporative condenser are connected in sequence to form a second refrigeration circuit.

8. The condensation crystallization system according to claim 7, characterized in that: The refrigeration module also includes a cooling water inlet, a cooling water outlet, a cooling water inlet pipeline and a cooling water outlet pipeline; The cooling water inlet ends of the first water-cooled condenser and the second water-cooled condenser are both connected to the cooling water inlet through the cooling water inlet pipeline; The cooling water outlet end of the second water-cooled condenser and the second water-cooled condenser are both connected to the cooling water outlet through the cooling water outlet pipeline; The first flow switch is arranged on the cooling water inlet pipeline and / or the cooling water outlet pipeline.

9. The condensation crystallization system according to claim 7, characterized in that: The primary refrigeration unit further comprises at least one of the following: a first pressure detection member connected between the first compressor and the first oil separator; a first temperature detecting member connected between the first compressor and the first oil separator; a second pressure detection member connected between the first compressor and the evaporative condenser; A second temperature detecting member is connected between the first compressor and the evaporative condenser.

10. The condensation crystallization system according to claim 7, characterized in that: The secondary refrigeration unit further comprises at least one of the following: a third temperature detecting member connected between the second compressor and the regenerator; a third pressure detection member connected between the second compressor and the evaporative condenser; a fourth temperature detecting member connected between the second compressor and the evaporative condenser; a defrost valve connected between the second compressor and the fourth switch valve; A buffer tank, wherein the inlet of the buffer tank is connected to the regenerator, the outlet of the buffer tank is connected to the evaporative condenser, and a right-angle valve and a unloading valve are connected between the outlet of the buffer tank and the evaporative condenser.

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