CN204656023U - Heat pump driven supergravity field enhanced evaporation system - Google Patents

Abstract

The utility model discloses a heat pump-driven supergravity field enhanced evaporation system, which comprises a solution storage tank (1), a first-stage heat recovery dehumidifier (2), a preheater (3), and a supergravity enhanced evaporation chamber (4) ), two-stage regenerative dehumidifier (5), packed dehumidification tower (6), crystallizer (7), cascade heat pump system (8), pump (9), hot water tank (10), pipeline fan (11 ) and other components. The heating and cooling capacity of the utility model all comes from the heat pump system. In the evaporation chamber, the supergravity rotating field and the liquid heating circulating gas are used to improve the humidity carrying capacity of the gas. The high temperature humidity carrying gas passes through the primary and secondary heat recovery dehumidifiers. After dehumidification and heat exchange, it enters the dehumidification packed tower, and after cooling and dehumidification, it enters the supergravity enhanced evaporation chamber to circulate humidity again. The utility model has independent heat recovery and dehumidification equipment, which is more energy-saving, and can also realize low-temperature evaporation and evaporation of heat-sensitive substances.

Description

A Heat Pump Driven Supergravity Field Enhanced Evaporation System

technical field

The invention relates to a heat pump-driven supergravity field enhanced evaporation system, which is widely used in petrochemical, food, light industry, pharmaceutical, sewage treatment, seawater desalination and other industries.

Background technique

In recent years, the living environment of human beings has been deteriorating day by day, and how to improve the living environment has become an important issue. With the continuous development of industrialized industries, the pollution of the environment caused by the unavoidable sewage in the production process is becoming more and more serious. The pollution concentration of wastewater produced by some industrial industries is getting higher and higher, the composition is more and more complex, and the discharge volume is increasing. In addition to organic pollutants, these wastewater also contain a large amount of inorganic salts. If these high-salt, high-organic waste water is discharged directly without treatment, it will inevitably cause great harm to aquatic organisms, drinking water, and industrial and agricultural production water.

At present, more sewage treatment still adopts biochemical treatment and physical and chemical treatment methods. Both methods can only remove organic matter and heavy metal ions, but lack corresponding treatment processes for inorganic salts in water bodies. Therefore, it is very important to apply evaporative desalination treatment process to desalinate the treated wastewater.

At present, multi-stage flash evaporation technology and mechanical vapor recompression technology are widely used. The heat source mainly adopts the continuous raw steam of the boiler. For enterprises that need to purchase steam, as the market steam price rises, the steam operation cost is getting higher and higher, and the burden on the enterprise is increasing sharply. How to reduce the steam operation cost of the device and save energy is the key current problem to be solved.

Compared with the currently mainly used wastewater evaporation process, the present invention uses a heat pump system to drive a supergravity field to strengthen the gas circulation to absorb moisture, and uses the moisture-carrying capacity of the gas to absorb moisture in the liquid. After multiple cycles of absorption, the absorption efficiency is higher. No secondary pollution discharge, more environmentally friendly. The dehumidification packed tower is used to condense and dehumidify the circulating humidity-carrying gas, and the condensed water is stored at the bottom of the dehumidified packed tower as a cooling medium for recycling, which reduces the volume of the equipment. The invention adopts the first-level and second-level heat recovery dehumidifiers to dehumidify and perform heat recovery at the same time, which greatly reduces the energy consumption of the system and is more energy-saving. Moreover, the present invention can not only realize high-temperature and high-efficiency evaporation at 90°C, but also realize low-temperature evaporation below 60°C for heat-sensitive substances.

Contents of the invention

Aiming at the problems existing in the prior art, the heating and cooling capacity of the heat pump-driven supergravity field enhanced evaporation system of the present invention all comes from the heat pump system, and the method of using the supergravity rotating field and liquid to heat the circulating gas in the evaporation chamber improves the gas Humidity-carrying capacity, the high-temperature humidity-carrying gas is dehumidified and heat-exchanged by the first-stage and second-stage regenerative dehumidifiers, and then enters the dehumidification packed tower. After cooling down and dehumidifying, it enters the high-gravity enhanced evaporation chamber again to carry moisture. The system has independent heat recovery and dehumidification equipment, which is more energy-saving, and can also achieve low-temperature evaporation and evaporation of heat-sensitive substances.

The purpose of the present invention is achieved by the following technical solutions, a heat pump driven supergravity field enhanced evaporation system, which consists of a solution storage tank (1), a primary regenerative dehumidifier (2), a preheater (3), Supergravity enhanced evaporation chamber (4), secondary heat recovery dehumidifier (5), dehumidification packed tower (6), crystallizer (7), cascade heat pump system (8), feed pump (9), hot water box (10) and pipeline fan (11); including 1) the liquid is injected into the filter type solution storage tank to remove the solids, and then sent to the first-stage regenerative dehumidifier and preheater by the feed pump for heating; 2) after preheating The liquid enters the supergravity enhanced evaporation chamber to heat the circulating gas; 3) The circulating gas is blown into the supergravity enhanced evaporation chamber by the pipeline fan, and after heating up, part of the water vapor is taken away; 4) The moisture-absorbed circulating gas passes through the primary and secondary After dehumidification and heat exchange, the stage regenerative dehumidifier enters the dehumidification seasoning tower, and the cold water cooled by the heat pump system is used for cooling and dehumidification; 5) The condensed water flows into the condensed water storage room at the bottom of the dehumidification packed tower; 6) The low-temperature and low-humidity circulating gas enters the secondary return After the heat exchange of the heat dehumidifier, the temperature rises and enters the supergravity enhanced evaporation chamber again; 7) At the bottom of the supergravity enhanced evaporation chamber, the concentrated liquid is transported by the forced circulation pump and mixed with the liquid transported by the solution storage tank through the feed pump, and the mixed liquid passes through After being heated by the first-stage regenerative dehumidifier and preheater, it enters the supergravity enhanced evaporation chamber again.

The invention realizes liquid evaporation by using the property that the moisture content increases after the gas is heated up, and strengthens the mass transfer and heat transfer process between the liquid and the circulating gas (air or nitrogen) through the supergravity rotating field. The present invention adopts a two-stage heat recovery and dehumidification method. The humidity-carrying gas first exchanges heat with the liquid, and then exchanges heat with the low-humidity gas, thereby greatly reducing the energy consumption required by the system. The circulating gas after the two-stage dehumidification is conducive to strengthening Intensifies the moisture absorption effect in the evaporation chamber.

The heat for preheating hot water and condensing cold water in the system is provided by the cascade heat pump system 8. The cascade heat pump system 8 is divided into a low temperature section and a high temperature section, and the low temperature section and the high temperature section are separated by an evaporative condenser. 804 heat exchange, the system can produce hot and cold water with a large temperature difference. The high-temperature hot water produced can preheat the liquid to a higher temperature, which is conducive to the moisture absorption of the gas in the supergravity-enhanced evaporation chamber 4 and improves the evaporation efficiency of the system.

In the liquid circulation of the heat pump-driven high-gravity enhanced evaporation system, the liquid is poured into the solution storage tank, and then the larger solid particles are filtered through a filter screen and enter the solution storage tank, and then injected into a liquid storage tank through a feed pump. The heated liquid enters the supergravity enhanced evaporation chamber to exchange heat with the circulating gas, part of the water vapor is taken away by the circulating gas, and the concentrated liquid falls to the bottom of the evaporation chamber through the circulating pump After being transported and mixed with the original liquid and preheated again, it enters the supergravity enhanced evaporation chamber, and the highly concentrated liquid is poured into the crystallizer for crystallization.

In the water cycle of the heat pump-driven supergravity enhanced evaporation system, 1) hot water enters the condenser from the hot water tank for heating, then enters the preheater to preheat the liquid, and then enters the hot water tank, Circulation. 2) The condensed water is pumped into the crystallizer from the storage room at the bottom of the dehumidified packed tower through the condensed water circulation pump to cool down the high-concentration liquid, then pumped into the evaporator to cool down, and the cooled condensed water enters the dehumidified packed tower The condensed water storage room at the bottom of the packed dehumidification tower directly contacts with the circulating gas for heat exchange, and then circulates.

In the gas cycle of the heat pump-driven supergravity enhanced evaporation system, the circulating gas enters the supergravity enhanced evaporation chamber under the action of the blower to carry moisture, and then leads out to the primary and secondary heat recovery dehumidifiers under the action of the induced draft fan. , into the dehumidification packed tower, after being cooled by condensed water, the moisture content of the circulating gas decreases, enters the regenerator to be heated again, enters the supergravity enhanced evaporation chamber, and circulates.

The heating and cooling required in the heat pump-driven supergravity enhanced evaporation system all come from the heat pump system, and different heat sources can be selected for different processing objects, such as low-grade steam, solar energy, etc.

The circulating gas in the heat pump-driven high-gravity enhanced evaporation system is different for different processing objects and processing requirements. Usually, air can be used, and nitrogen can be used when it involves industries such as medicine and food.

The top of the supergravity enhanced evaporation chamber is equipped with a frequency conversion motor, which is connected with the central tube. The concentric circular frame-type packing plate and the central tube are welded as a whole, and are driven by the frequency conversion motor to rotate together to form a supergravity field. A certain number of through holes are distributed on the pipe wall to facilitate the liquid spraying into the packing pan. The corrugated plate with evenly distributed through holes on the surface is inserted into the concentric circular frame packing pan at a specific angle. The wall is sprayed with liquid; the top of the supergravity enhanced evaporation chamber is equipped with a demister to prevent the entrainment of liquid in the circulating gas, and the bottom of the interior is a liquid storage chamber for temporary storage of concentrated liquid.

In order to further reduce the moisture content of the circulating gas entering the supergravity enhanced evaporation chamber 4, and enhance the moisture absorption effect of the circulating gas in the supergravity enhanced evaporation chamber 4, after cooling the secondary heat recovery dehumidifier 5, The circulating gas (c) is passed into the dehumidification packed tower 6, and the low-temperature cold water generated by the cascade heat pump 8 is used to further reduce the temperature, so as to achieve the purpose of reducing the moisture content of the circulating gas. The temperature of the circulating gas (c) of the dehumidifier 5 is lowered in the dehumidification packed tower 6, and the condensed water is precipitated, and flows into the condensed water storage chamber at the bottom of the dehumidified packed tower 6 to supplement cold water for refrigeration. The packed dehumidification tower is provided with a condensed water storage chamber at the bottom of the tower, and the condensed water storage chamber is provided with an overflow port. The condensed water flows into the storage chamber from the outlet pipe at the bottom of the packed dehumidified tower. Mouth overflowing.

The present invention differs from a waste water evaporation system (CN 104118918 A) utilizing solar energy in that:

(1) All the heating capacity and cooling capacity in a waste water evaporation system utilizing solar energy (CN 104118918 A) are derived from solar-driven lithium bromide refrigeration systems. Advanced lithium bromide refrigeration system, more stable operation.

(2) There is no independent heat recovery device in a wastewater evaporation system utilizing solar energy (CN 104118918 A). The present invention adopts a primary heat recovery dehumidifier and a secondary heat recovery dehumidifier as heat recovery dehumidification equipment. In the stage regenerative dehumidifier 2, the high-temperature humidity-carrying gas a from the high-gravity rotary evaporation chamber 4 exchanges heat with the mixed liquid from the solution storage tank 1 and the high-gravity enhanced evaporation chamber 4. Finally, the temperature of the high-temperature humidity-carrying gas a from the supergravity enhanced evaporation chamber 4 decreases, and condensed water is precipitated, and a large amount of heat is released at the same time. The mixed liquid absorbs the heat, and the temperature rises, thereby reducing the heating capacity required by the heat pump system; The humidity-carrying gas b from the dehumidification packed tower 6 exchanges heat with the low-temperature and low-humidity gas d that is about to enter the supergravity enhanced evaporation chamber 4. After the heat exchange, the higher The temperature of the humidity-carrying gas b is further reduced, condensed water is precipitated, and a large amount of heat is released. The reduction of the temperature of the humidity-carrying gas is conducive to reducing the cooling capacity required by the heat pump system when it is cooled in the dehumidification packed tower 6, from The dehumidification packed tower 6 is about to enter the high-gravity enhanced evaporation chamber 4. The low-temperature and low-humidity gas d absorbs heat, and the temperature rises. moisture absorption capacity.

(3) In a waste water evaporation system using solar energy (CN 104118918 A), the surface cooler is used to cool and dehumidify the circulating gas, the circulating gas exchanges heat with the cold water partition, and the precipitated condensed water is directly discharged into the condensed water storage tank. The invention adopts the dehumidification packing tower for cooling and dehumidification, the cold water is in direct contact with the circulating gas, and the heat is exchanged countercurrently, and the packing is arranged in the seasoning tower to strengthen the heat exchange process, so that the heat exchange efficiency is higher, and the condensed water is separated out and mixed with cold water to flow into the dehumidification packing tower The condensed water storage chamber at the bottom replenishes the cold water used for refrigeration.

(4) A waste water evaporation system utilizing solar energy (CN 104118918 A) in which the evaporation chamber adopts a straight wire mesh wound on the middle pipe as filler, which is easy to be blocked and needs to be cleaned and replaced frequently. Multi-layer concentric frame structure, the inner frame has a smaller concentric radius and the outer layer is larger, the concentric circles are connected by spokes, the upper and lower frames are fixed by tie rods, and the concentric frame is inserted at a specific angle The corrugated plate has fewer inner layers and more outer layers to ensure that the channel gap is more uniform and not easy to be blocked, which is more conducive to heat exchange between circulating gas and liquid.

The heat pump-driven supergravity enhanced evaporation system of the present invention has the following advantages or benefits: the present invention uses a cascaded heat pump system as a heat source to raise the liquid to a higher temperature and realize efficient evaporation. The invention adopts the first-level and second-level heat recovery dehumidifiers to dehumidify and perform heat recovery at the same time, which greatly reduces the energy consumption of the system and is more energy-saving. Moreover, the present invention can not only realize high-temperature and high-efficiency evaporation at 90°C, but also realize low-temperature evaporation below 60°C for heat-sensitive substances.

Description of drawings

Fig. 1 is a schematic diagram of the heat pump driven supergravity field enhanced evaporation system of the present invention.

Fig. 2 is a schematic diagram of the heat pump driven supergravity field enhanced evaporation system of the present invention.

Fig. 3 is an assembly diagram of the core body of the secondary heat recovery dehumidifier in the embodiment of the present invention.

Fig. 4 is an exploded view of the core body of the two-stage regenerative dehumidifier in the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. It should be understood that this embodiment is only used to illustrate the present invention and is not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art may modify or modify various equivalent forms of the present invention The expansion of the scope of application all falls within the scope defined by the appended claims of the present application.

Example

The principle diagram of the heat pump-driven supergravity field enhanced evaporation system in this embodiment is shown in Figure 1. After the gas temperature rises, the moisture content increases, and the water vapor mass per unit mass of gas increases, and the water vapor produced by the heat pump system High-temperature hot water preheats the liquid from the solution storage tank. The heated liquid exchanges heat with the circulating gas used to carry water vapor in the supergravity enhanced evaporation chamber. The temperature of the circulating gas increases, and the moisture carrying capacity increases, taking away more The heat exchange process is strengthened by the supergravity rotating field, and the moisture absorption effect of the circulating gas is enhanced.

This embodiment is realized through the following workflow, as shown in Figure 2, a schematic diagram of a heat pump driven supergravity field enhanced evaporation system, the system consists of a waste liquid storage tank 1, a primary dehumidifier 2, a preheater 3, and a supergravity enhanced Evaporation chamber 4, secondary dehumidifier 5, dehumidification packed tower 6, crystallizer 7, cascade heat pump system 8, pump 9, hot water tank 10, pipeline fan 11, etc. The implementations with arrows are pipelines, and the direction of the arrow represents the flow direction of the working medium in the pipeline.

The system adopts a two-stage heat recovery and dehumidification method, using the waste heat (latent heat and sensible heat) of the high-temperature humidity-carrying gas (a) coming out of the high-gravity enhanced evaporation chamber 4 to first combine with the heat from the solution storage tank 1 and the The mixed liquid in the supergravity enhanced evaporation chamber 4 exchanges heat, and then exchanges heat with the low-temperature and low-humidity gas (d) that is about to enter the supergravity enhanced evaporation chamber 4. This process makes full use of the high-temperature moisture-carrying gas (a) waste heat, reducing energy consumption of the entire system.

In the primary regenerative dehumidifier 2, the high-temperature humidity-carrying gas (a) from the supergravity enhanced evaporation chamber 4 is mixed with the mixed liquid from the solution storage tank 1 and the supergravity enhanced evaporation chamber 4 Carry out heat exchange, after heat exchange, the temperature of the high-temperature humidity-carrying gas (a) from the supergravity enhanced evaporation chamber 4 decreases, and condensed water is precipitated, and a large amount of heat is released at the same time, from the solution storage tank 1 and from the supergravity The mixed liquid mixed in the gravity-enhanced evaporation chamber 4 absorbs the heat, and the temperature rises, thereby reducing the heating capacity required to be provided by the heat pump system.

In the secondary heat recovery dehumidifier 5, the higher temperature humidity-carrying gas (b) from the primary heat recovery dehumidifier 2 and the dehumidification packed tower 6 are about to enter the supergravity strengthening The low-temperature and low-humidity gas (d) in the evaporation chamber 4 is heat-exchanged. After the heat exchange, the temperature of the higher-temperature humidity-carrying gas (b) from the first-stage regenerative dehumidifier 2 is further reduced, and condensed water is precipitated and released. A large amount of heat, the reduction of the temperature of the humidity-carrying gas is conducive to reducing the cooling capacity that the heat pump system needs to provide when it cools down in the dehumidification packed tower 6; The low-temperature and low-humidity gas (d) absorbs heat, the temperature rises, and the low-temperature and low-humidity gas (d) after the temperature rise is conducive to improving its moisture absorption capacity in the supergravity enhanced evaporation chamber 4 .

In order to fully understand the heat pump-driven supergravity enhanced evaporation system of the present invention, the following is an example of 500t/d industrial wastewater produced by a certain factory at 35°C. The industrial wastewater after production mainly contains magnesium sulfate with a mass fraction of 20%, and the mass fraction of magnesium sulfate in the treated waste liquid reaches 40%.

Inject industrial waste water into the filter type solution storage tank 1 through the inlet pipe of the solution storage tank, and filter to remove solids. When the system is started, first start the heat pump system 8, the top motor and pipeline fan of the supergravity enhanced evaporation chamber 4, and open the feed valve. The liquid is transported by the feed pump 901 and enters the preheater 3 through the first-stage heat recovery dehumidifier 2. The liquid in the preheater is preheated by the hot water heated by the working fluid of the heat pump system. After the liquid is preheated, it enters the supergravity enhanced evaporation chamber 4. Spray through the solution inlet pipe into the concentric circular frame packing pan driven by the motor to exchange heat with the circulating gas, the water is taken away, the concentrated solution falls into the bottom of the evaporation chamber, and after a certain amount of liquid is delivered, the feed valve is closed , open the circulation valve, the liquid is preheated in the first-stage heat recovery dehumidifier 2 and the preheater 3 again under the action of the circulation pump, and then enters the supergravity enhanced evaporation chamber 4, reciprocating in this way, and circulates until the liquid at the bottom of the evaporation chamber reaches The working condition requires concentration, and the circulating gas after the humidity load first enters the first-stage heat recovery dehumidifier 2 for cooling and dehumidification under the action of the induced draft fan, and the large amount of heat released is used to heat the liquid, and then enters the secondary heat recovery dehumidifier 5 to give The low-temperature and low-humidity circulating gas entering the supergravity enhanced evaporation chamber 4 is heated, and then enters the dehumidification packed tower 6 for cooling and dehumidification. Gravity strengthens the evaporation chamber 4, so the circulation effect. When the system is running stably, open the feed valve, circulation valve and discharge valve at the same time, the feed and discharge are carried out at the same time, the system is in continuous operation, the gas circulation is a closed cycle, and the system control is simple and stable.

The top of the super-gravity enhanced evaporation chamber 4 is equipped with a frequency conversion motor, which is connected with the center tube. The concentric circular frame-type packing plate and the center tube are welded as a whole, and rotate together under the drive of the frequency conversion motor to form a supergravity field. The center tube A certain number of through holes are distributed on the wall to facilitate liquid spraying into the packing pan. The corrugated plate with evenly distributed through holes on the surface is inserted into the concentric circular frame packing pan at a specific angle. The wall is sprayed with liquid; the top of the supergravity enhanced evaporation chamber 4 is provided with a demister to prevent entrainment of liquid in the circulating gas, and the bottom of the interior is a liquid storage chamber for temporary storage of concentrated liquid. The filling plate of the central tube in the supergravity enhanced evaporation chamber 4 is a multi-layer concentric frame structure. The concentric circles of the inner frame have a smaller radius and the outer layer is larger. The concentric circles are connected by spokes, and the upper and lower frames are fixed by tie rods. The corrugated plates with through-holes are inserted into the concentric frame at a specific angle. The number of inner layers is small and the number of outer layers is large, so as to ensure a more uniform channel gap and facilitate heat exchange between circulating gas and liquid.

According to the processing capacity and processing requirements, the low-temperature section of the cascade heat pump uses working fluid R410a, and the high-temperature section uses working fluid R134a, which can produce 85°C hot water. The waste liquid is heated to 80°C by hot water and enters the evaporation chamber. In the evaporation chamber, the relative humidity is 20%. After the air at 35°C is warmed and absorbs moisture, the temperature rises to 75°C and the relative humidity is 95%. In the primary dehumidifier, the air at 75°C is reduced to 53°C, and the mixed waste liquid is heated to 70°C. The 40°C concentrated liquid at the bottom of the evaporation chamber is mixed with the original 35°C waste liquid through the circulation pump and enters the regenerator. The mixed waste liquid in the preheater is heated to 80°C to absorb 1600kW of heat, the COP of the heat pump is 3.17, the power of the motor is 500kW, and the evaporation of 1 ton of water consumes 48 kWh of electricity.

The invention realizes liquid evaporation by using the characteristic of increasing moisture content after the gas is heated up, and strengthens the mass transfer and heat transfer process between the liquid and the circulating gas (air or nitrogen) through the supergravity rotating field, which is highly efficient and environmentally friendly, and has no secondary pollution discharge. The invention uses a dehumidification packing tower to condense and dehumidify the circulating humidity-carrying gas, and the condensed water is stored at the bottom of the dehumidification packing tower and used as a cooling medium for recycling, thereby reducing the volume of the equipment. The present invention adopts one-stage and two-stage heat recovery dehumidifiers, and performs heat recovery at the same time of dehumidification, which greatly reduces energy consumption of the system and is more energy-saving. Moreover, the present invention can not only realize high-temperature and high-efficiency evaporation at 90°C, but also realize low-temperature evaporation for heat-sensitive substances below 60°C. It has a wide range of applications and can be applied in many industries such as medicine, food, seawater desalination, and fine chemical industry.

The secondary dehumidifier is a finned plate heat exchanger, the assembly diagram and exploded diagram of its core body are shown in Figure 3 and Figure 4 respectively, the humidity-carrying gas with a higher temperature enters from the top inlet pipe of the regenerator, and the bottom outlet The pipe flows out, preheating the low-temperature circulating gas flowing out from the top of the packed dehumidification tower, so as to play the role of heat recovery and energy saving.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A heat pump-driven supergravity field enhanced evaporation system, characterized in that the system consists of a solution storage tank (1), a primary regenerative dehumidifier (2), a preheater (3), and a supergravity enhanced evaporation chamber ( 4), secondary heat recovery dehumidifier (5), dehumidification packed tower (6), crystallizer (7), cascade heat pump system (8), feed pump (9), hot water tank (10), pipeline Fan (11) is composed; After the liquid is injected into the solution storage tank (1) to remove solids, it is sent to the first-stage regenerative dehumidifier (2) and preheater (3) by the feed pump (9) for heating; the preheated The liquid enters the supergravity enhanced evaporation chamber (4) to heat the circulating gas; the circulating gas is blown into the supergravity enhanced evaporation chamber (4) by the pipeline fan (11), and takes away part of the water vapor after heating up; The circulating gas after moisture absorption is dehumidified and heat-exchanged by the first-stage heat recovery dehumidifier (2) and the second-stage heat recovery dehumidifier (5), then enters the dehumidification seasoning tower (6) and is cooled by cold water cooled by the heat pump system Dehumidification; condensed water flows into the condensed water storage room at the bottom of the dehumidification packed tower (6); at the bottom of the supergravity enhanced evaporation room (4), the concentrated liquid is transported by the forced circulation pump and the solution storage tank is transported by the feed pump The liquids are mixed, and the mixed liquid enters the supergravity enhanced evaporation chamber (4) after being heated by the first-stage heat recovery dehumidifier (2) and the preheater (3). 2. The supergravity field enhanced evaporation system according to claim 1, characterized in that the heat for preheating hot water and condensing cold water in the system is provided by the cascade heat pump system (8), and the cascade heat pump system (8) It is divided into a low-temperature section and a high-temperature section, and the heat exchange between the low-temperature section and the high-temperature section is through an evaporative condenser (804). 3. The supergravity field enhanced evaporation system according to claim 1, characterized in that the system adopts two-stage heat recovery and dehumidification, and utilizes the waste heat of the high-temperature humidity-carrying gas coming out of the supergravity enhanced evaporation chamber (4) to first Exchange heat with the mixed liquid from the solution storage tank (1) and the supergravity enhanced evaporation chamber (4), and then exchange heat with the low-temperature and low-humidity gas that is about to enter the supergravity enhanced evaporation chamber (4) . 4. The high-gravity field enhanced evaporation system according to claim 3, characterized in that, in the first-stage regenerative dehumidifier (2), the high-temperature humidity-carrying gas from the high-gravity enhanced evaporation chamber (4) is combined with the The solution storage tank (1) exchanges heat with the mixed liquid from the supergravity enhanced evaporation chamber (4), and after the heat exchange, the temperature of the high-temperature humidity-carrying gas from the supergravity enhanced evaporation chamber (4) decreases, And condensed water is precipitated, and a large amount of heat is released at the same time. The mixed liquid from the solution storage tank (1) and the supergravity enhanced evaporation chamber (4) absorbs the heat, and the temperature rises, reducing the heat pump system. The heating capacity to be provided. 5. The supergravity field enhanced evaporation system according to claim 3, characterized in that, in the secondary heat recovery dehumidifier (5), the load from the primary heat recovery dehumidifier (2) after cooling The wet gas exchanges heat with the low-temperature and low-humidity gas from the dehumidification packed tower (6) that is about to enter the supergravity enhanced evaporation chamber (4). The temperature of the humidity-carrying gas (b) is further lowered, and condensed water is precipitated. 6. The supergravity field enhanced evaporation system according to claim 1, characterized in that, the top of the supergravity enhanced evaporation chamber (4) is equipped with a frequency conversion motor, which is connected to the central tube, and the concentric circular frame packing plate is connected to the The center pipe is welded as a whole, and rotates together under the drive of the frequency conversion motor to form a supergravity field. A certain number of through holes are distributed on the wall of the center pipe to facilitate the liquid spraying into the packing pan. The corrugated plate with uniform holes on the surface forms a specific Inserted at an angle on the concentric frame-type packing plate, the liquid inlet pipe extends into the center of the through pipe, and sprays liquid on its wall; the top of the supergravity enhanced evaporation chamber (4) is equipped with a demister to prevent the liquid in the circulating gas The entrainment, the inner bottom is a liquid storage cavity, which is used for temporary storage of concentrated liquid. 7. The supergravity field-enhanced evaporation system according to claim 6, characterized in that, the center pipe packing plate of the supergravity enhanced evaporation chamber (4) is a multi-layer concentric circle frame structure, and the concentric circle radius of the inner frame is Small, large outer layer, spokes are used to connect the concentric circles, the upper and lower frames are fixed by tie rods, and the corrugated plate with evenly distributed through holes on the surface is inserted into the concentric frame at a specific angle, the number of inner layers is small, and the number of outer layers is large, ensuring The channel gap is more uniform, which is beneficial to the heat exchange between the circulating gas and the liquid. 8. The supergravity field enhanced evaporation system according to claim 1, characterized in that, the circulating gas after the cooling of the two-stage regenerative dehumidifier (5) is passed into the dehumidification packed tower (6), and the The low-temperature cold water generated by the cascade heat pump (8) is further cooled, and the temperature of the circulating gas of the secondary heat recovery dehumidifier (5) is lowered in the dehumidification packed tower (6), and the condensed water is precipitated and flows into the dehumidifier The condensed water storage chamber at the bottom of the packed tower (6) is used to supplement the cold water for refrigeration. The condensed water storage chamber is provided with an overflow port, and when the amount of condensed water is too much, it will overflow from the overflow port. 9. The supergravity field enhanced evaporation system according to claim 1, characterized in that, the solution storage tank (1) is a filter type solution storage tank, and the liquid enters the solution storage tank (1) and passes through a filter screen Filter out large solid particles and enter the solution storage tank (1), and then pump them into the first-stage regenerative dehumidifier (2) and preheater (3) through the feed pump (9) for heating. The final liquid enters the supergravity enhanced evaporation chamber (4) to exchange heat with the circulating gas, part of the water vapor is taken away by the circulating gas, and the concentrated liquid falls to the bottom of the evaporation chamber and is transported by the circulating pump to mix with the original liquid and then enters the The supergravity strengthens the evaporation chamber (4), and the highly concentrated liquid is poured into the crystallizer (7) for crystallization. 10. The supergravity field enhanced evaporation system according to claim 1, characterized in that, the secondary regenerative dehumidifier (5) is a finned plate heat exchanger.