CN113307319A

CN113307319A - High-throughput low-temperature vacuum evaporator

Info

Publication number: CN113307319A
Application number: CN202110477306.6A
Authority: CN
Inventors: 路建伟; 刘威; 汪慧星
Original assignee: Kunshan Wsd Environmental Protection Equipment Co ltd
Current assignee: Kunshan Wsd Environmental Protection Equipment Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-08-27

Abstract

The invention relates to a high throughput low temperature vacuum evaporator, comprising: the evaporator, at least two groups of heat pump systems and a pressure reducing device; the evaporation tank is provided with a steam outlet and a concentrated solution outlet; each group of heat pump systems respectively comprises: the heat exchanger is arranged in the evaporation tank, the compressor unit comprises a plurality of compressors which are arranged in parallel, the compressor unit is provided with an air inlet port, each compressor is respectively connected with the air inlet port and the heat exchanger, the air inlet port is used for distributing gaseous refrigerants to each compressor to form heat exchange media conveyed to the heat exchanger so as to heat waste liquid in the evaporation tank and evaporate the waste liquid to form steam; the decompression device is used for decompressing the inside of the evaporation tank. The high-throughput low-temperature vacuum evaporator can greatly increase the throughput and realize high heat exchange efficiency and high effluent quality at lower cost.

Description

High-throughput low-temperature vacuum evaporator

Technical Field

The invention relates to a high-throughput low-temperature vacuum evaporator, and belongs to the field of environment-friendly equipment.

Background

Energy and environmental issues have become increasingly prominent in industrial production, which puts higher demands on energy saving technology. The discharge of hazardous waste liquids such as industrial wastewater causes serious environmental pollution, and the sewage discharge needs to be strictly controlled in order to protect the environment. Therefore, enterprises need to discharge the sewage to a special sewage treatment plant for treatment, and the sewage treatment plant generally charges according to the treatment capacity, for example, one ton and several thousand yuan, so the cost of the enterprises on sewage treatment is greatly increased.

The heat pump technology is an efficient and environment-friendly energy-saving technology, and can be widely applied to the industrial production fields of chemical industry, low-grade heat energy utilization, seawater desalination, sewage treatment and the like. After the heat pump evaporation concentration, the distilled water meeting the discharge standard can be extracted from the sewage, the distilled water can be directly discharged, and the rest concentrate is discharged to a sewage treatment plant for treatment, so that the sewage treatment cost of an enterprise can be greatly reduced. However, most of the existing evaporation concentration equipment has low treatment capacity, poor heat exchange efficiency, high price and energy consumption, and large investment for purchasing a plurality of equipment for enterprises with large daily average treatment capacity. In addition, when the treatment capacity is improved by simply connecting a plurality of heat pumps in parallel, the load of the matched elements of the heat pumps is increased, and the matched elements are required to be correspondingly adjusted, so that the complexity of the whole equipment is greatly increased, and the cost of equipment maintenance and the like is further increased.

Therefore, it is necessary to design a high throughput low temperature vacuum evaporator to solve the above problems.

Disclosure of Invention

The invention aims to provide a high-throughput low-temperature vacuum evaporator, which can greatly increase the throughput of equipment and realize high heat exchange efficiency and high effluent quality at lower cost.

In order to achieve the purpose, the invention provides the following technical scheme: a high-throughput, low-temperature vacuum evaporator, comprising:

the evaporator, at least two groups of heat pump systems and a pressure reducing device;

the evaporation tank is provided with a steam outlet and a concentrated solution outlet;

each group of heat pump systems respectively comprises: the heat exchanger is arranged in the evaporation tank, the compressor unit comprises a plurality of compressors which are arranged in parallel, the compressor unit is provided with an air inlet port, each compressor is respectively connected with the air inlet port and the heat exchanger, the air inlet port is used for distributing gaseous refrigerants to each compressor to form heat exchange media conveyed to the heat exchanger so as to heat waste liquid in the evaporation tank and evaporate the waste liquid to form steam;

the decompression device is used for decompressing the inside of the evaporation tank.

Further, the heat exchanger includes a plurality of parallelly connected and along axial parallel arrangement's mosquito-repellent incense coil pipe, first pipeline and second pipeline, every mosquito-repellent incense coil pipe's import with first pipe connection, each mosquito-repellent incense coil pipe's export with second pipe connection, heat transfer medium can pass through first pipeline flows in each mosquito-repellent incense coil pipe, by the second pipeline flows out.

Further, each mosquito coil is arranged in such a way that the heat exchange medium flows into the inner side of the mosquito coil from the inlet and is coiled to the outer side to be output from the outlet.

Furthermore, the number of the heat pump systems is two, and the mosquito coil pipes of the two heat exchangers are sequentially staggered and stacked.

Furthermore, the heat exchanger also comprises a fixing device for fixing each mosquito coil, wherein the fixing device comprises a fixing plate corresponding to each mosquito coil and a positioning plate positioned on the outer side of each mosquito coil;

the fixing plates extend along the radial direction of the mosquito coil and are fixed on the positioning plates, each fixing plate is provided with a clamping groove corresponding to the pipe diameter of the mosquito coil, the mosquito coil is clamped with the clamping grooves, and the positioning plates extend along the axial direction of the mosquito coil; and/or the presence of a gas in the gas,

each mosquito-repellent incense coil corresponds to a plurality of fixing plates arranged at intervals along the circumferential direction of the mosquito-repellent incense coil, and a plurality of positioning plates are arranged at intervals along the circumferential direction; and/or the presence of a gas in the gas,

each fixing plate is provided with a plurality of clamping grooves which are distributed along the radial direction, and the pipeline of each mosquito coil is clamped in each clamping groove circle by circle.

Each group of heat pump systems further comprises a refrigerating device and a condensing tank, the condensing tank is connected with the steam outlet, and the heat exchange medium in the heat exchanger can flow into the refrigerating device and flow back to the compressor unit through the condensing tank; the steam flowing into the condensation tank can be cooled by the heat exchange medium.

Further, still include the distilled water jar, distilled water jar is connected the condensing jar and the pressure relief device.

Furthermore, the compressor unit further comprises an air suction pipe, the air inlet port is arranged on the air suction pipe, the air suction pipe comprises a main pipe and a plurality of branch pipes, the main pipe is transversely arranged, the branch pipes are perpendicular to the main pipe, and the branch pipes are respectively connected with each compressor and provide gaseous refrigerants into the compressors.

Further, the compressor unit further comprises an exhaust pipe, the exhaust pipe is respectively connected with each compressor and the heat exchanger, and the heat exchange medium formed by each compressor is supplied to the heat exchanger through the exhaust pipe.

Further, steam outlet below is equipped with steam purification device, steam purification device includes the edge the vertical direction dislocation set of evaporating pot is in a plurality of baffles of preventing smuggleing secretly in the heat exchanger top, and set up prevent pressing from both sides the filtration purification ware of taking the baffle top.

Compared with the prior art, the invention has the beneficial effects that:

1) by arranging at least two groups of heat pump systems, each group of heat pump systems is respectively provided with a compressor unit, and a plurality of compressors are connected in parallel, overlapped and integrated, so that the output energy of the integrated compressor unit is increased, and on one hand, the handling capacity of an evaporator is improved on the premise of ensuring high energy efficiency; on the other hand, when one of the heat pump systems fails, the other heat pump system can still work normally, and can be stopped, checked and maintained at a proper time without influencing the conventional use of the evaporator;

2) the number of the compressors in different heat pump systems can be set to be different or the same, and the compressor units of the same heat pump system can also adopt compressors with unequal size ratios to provide more regulating stages, so that the cold output is more smoothly and dynamically matched with the actual load;

3) the heat exchanger is arranged to enable the refrigerant to flow in the evaporating tank, so that the energy of the refrigerant can be fully converted in the evaporating tank, and the heat exchange efficiency of the refrigerant is improved;

4) the heat exchanger is formed by connecting a plurality of groups of mosquito-repellent incense coil pipes in parallel, so that the span and the circulation distance of a refrigerant in the heat exchanger are reduced, the heat exchange efficiency is stable, and the heat exchanger is convenient to manufacture, disassemble, assemble and maintain, and is convenient for later maintenance;

5) the fluid is configured to be output from the inner side to the outer side of the coil in the mosquito coil pipe so as to reduce the resistance applied to the fluid in the flowing process, thereby avoiding the pressure drop of the system and ensuring the heat treatment efficiency of the compressor unit;

6) the mosquito-repellent incense coil pipes of the heat exchangers of different heat pump systems are sequentially staggered and stacked, so that on one hand, heat can be transferred among different heat exchangers, the heat is uniformly output, and on the other hand, the occupied space of the heat exchangers is reduced on the premise of ensuring the heat exchange area;

7) a steam purification device is arranged below a steam outlet of the evaporation tank, so that the effluent quality of the evaporation system is improved; and the filtration purifier adopts the purification filler to purify the steam, avoids producing the scale deposit when purifying efficiently, and removable reuse, maintenance and maintenance cost reduce.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a high throughput low temperature vacuum vaporizer according to a preferred embodiment of the present invention.

Fig. 2 is a schematic diagram of the first heat pump system of fig. 1.

Fig. 3 is a schematic diagram of a second heat pump system of fig. 1.

Fig. 4 is a schematic flow diagram of the vapor of fig. 1.

FIG. 5 is a perspective view of the first heat exchanger and the second heat exchanger in the high-throughput low-temperature vacuum evaporator according to a preferred embodiment of the present invention.

Fig. 6 is an enlarged view of the circled portion in fig. 5.

Fig. 7 is a perspective view of the fixing device of fig. 5.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

It should be noted that: the terms "upper", "lower", "left", "right", "inner" and "outer" of the present invention are used for describing the present invention with reference to the drawings, and are not intended to be limiting terms. In addition, the connection structure between the components in the following embodiments may adopt various existing mechanical connection methods, such as welding, screwing, etc., unless otherwise specified. Meanwhile, except for special description, the number and the functions of the valve structures, the sensors and the like can be selected according to actual needs.

Referring to fig. 1 to 7, a high throughput low temperature vacuum evaporator according to a preferred embodiment of the present invention includes an evaporator tank 1, at least two sets of

heat pump systems

2a and 2b, a pressure reducing device 3, and a distilled water tank 4.

The evaporation tank 1 is provided with a steam outlet 11 and a concentrated solution outlet 12; in the present embodiment, it is preferable that the steam outlet 11 is provided at the top of the evaporation tank 1 and the concentrated liquid discharge port 12 is provided at the bottom of the evaporation tank 1. The pressure reducing device 3 is used for vacuumizing the evaporation tank 1.

In this embodiment, the number of the

heat pump systems

2a and 2b is two, and the two heat pump systems are the first heat pump system 2a and the second heat pump system 2 b. In other embodiments, the number of heat pump systems can be designed according to actual needs, and is not limited herein. The first heat pump system 2a includes a first heat exchanger 21a, a first compressor unit 22a, a first cooling tank 23a, a first refrigeration equipment 24a, and a first oil separator 25 a; the second heat pump system 2b includes a second heat exchanger 21b, a second compressor unit 22b, a second cooling tank 23b, a second refrigeration equipment 24b, and a second oil separator 25 b. The first heat pump system 2a and the second heat pump system 2b have substantially the same configuration, and the connection between the evaporator 1, the pressure reducing device 3, and the distilled water tank 4 is also the same, and therefore, the first heat pump system 2a will be described in detail below as an example.

Referring to fig. 1 and 2, a first heat exchanger 21a is disposed in the evaporation tank 1, and a first compressor unit 22a is connected to the first heat exchanger 21a through a pipe. The first compressor string 22a includes a plurality of first compressors arranged in parallel. In this embodiment, the number of the first compressors is three, and the number of the second compressors is two. In other embodiments, the number of compressors may be selected based on actual needs, and the integrated first and

second compressor strings

22a and 22b may employ compressors of unequal size ratios to provide more adjustment stages to more smoothly and dynamically match the refrigeration output to the actual load.

In the present embodiment, the first compressor unit 22a employs a heat pump compressor. The first compressor group 22a has an air inlet port, and each first compressor is connected to the air inlet port and the first heat exchanger 21 a. The inlet port is used for distributing gaseous refrigerant to each first compressor, and forms a heat exchange medium conveyed to the first heat exchanger 21a so as to heat the waste liquid in the evaporation tank 1 and evaporate the waste liquid to form steam. The first compressor unit 22a further includes a suction pipe (not shown), an inlet port is disposed on the suction pipe, the inlet port is used for providing gaseous refrigerant into the suction pipe, and an outlet port is disposed on the suction pipe, the outlet port is connected to each first compressor, so as to distribute the gaseous refrigerant in the suction pipe to each first compressor. The gas refrigerant is distributed to each compressor through the suction pipe, so that the first compressors can be promoted to uniformly suck the gas, the efficiency of each first compressor is fully exerted, the heat treatment efficiency of the whole first compressor unit 22a is improved, liquid impact can be prevented, and the service life of the compressor unit is prolonged.

Preferably, the suction pipe includes a main pipe and branch pipes corresponding to the first compressors one to one, the gaseous refrigerant enters the suction pipe through an inlet port of the main pipe, and each branch pipe distributes the gaseous refrigerant in the main pipe to each first compressor through an outlet port. By means of the arrangement, the gaseous refrigerant can be uniformly distributed into each first compressor. The number of the branch pipes is consistent with that of the first compressor and is three; in other embodiments, the number of manifolds is uniformly adjusted based on the number of compressors.

In the present embodiment, the oil separator 25a is disposed between the first compressor unit 22a and the first heat exchanger 21a, and preferably, one first oil separator 25a is correspondingly disposed for each first compressor unit 22 a. The oil separator 25a is connected to the air outlet port and the air inlet port through oil circulation pipes, respectively. The high-temperature and high-pressure heat exchange medium pressed out by the first compressor firstly passes through the first oil separator 25a to separate oil from the medium, and the first compressors with different sizes and proportions can realize stable oil return through the corresponding first oil separators 25a, so that the first compressors are ensured to work stably and have long service life. In this embodiment, the outlet port of the first compressor unit 22a may also be provided with an exhaust pipe (not shown) to uniformly exhaust air, the exhaust pipe connects the first heat exchanger 21a and each first oil separator 25a, and the high-temperature and high-pressure heat exchange medium from which the oil is separated uniformly enters the exhaust pipe and then enters the first heat exchanger 21a through the pipeline.

In this embodiment, the first heat exchanger 21a is a coil heat exchanger, which is connected to the exhaust pipe and the first refrigerating device 24a, and further, the coil heat exchanger is formed by a plurality of mosquito coil coils 211a arranged in parallel and axially in parallel. Specifically, the coil heat exchanger includes a mosquito coil 211a, first and

second tubes

213a and 212a, and a fixing device 214. The mosquito coil coils 211a are vertically and parallelly fixed on the fixing device 214, the first pipeline 213a and the second pipeline 212a are arranged on the periphery of the mosquito coil coils 211a and axially perpendicular to the radial direction of the mosquito coil coils 211a, and through holes (not shown) for respectively connecting each mosquito coil 211a are arranged on the first pipeline 213a and the second pipeline 212 a. The heat transfer medium is uniformly distributed to each mosquito coil 211a through the first pipe 213a and then collected and output from the second pipe 212 a.

In this embodiment, each coil 211a is configured to output fluid from the inside of the coil 211a to the outside, and specifically, the inside of the coil 211a is connected to the first pipe 213a, and the outside of the coil 211a is connected to the second pipe 212 a. By adopting the arrangement mode, the system pressure drop caused by the fluid in the mosquito coil 211a can be avoided, thereby ensuring the stability of the heat exchange efficiency.

Referring to fig. 7, the fixing device 214 corresponds to a plurality of fixing plates 2141 arranged at intervals along the circumferential direction of the mosquito coil 211a and a positioning plate 2142 arranged at the periphery of the mosquito coil 211a, each fixing plate 2141 extends along the radial direction, a clamping groove 2143 corresponding to the pipe diameter of the mosquito coil 211a is arranged on the fixing plate 2141, and the fixing plates 2141 are fixed on the positioning plate 2142. Specifically, the plurality of positioning plates 2142 are uniformly arranged on the periphery of the mosquito coil 211a, the fixing plates 2141 are arranged layer by layer in the vertical direction of the positioning plates 2142, and the tube of each mosquito coil 211a is clamped in the clamping groove 2143 loop by loop. Preferably, a gap is formed between adjacent coils 211a, thereby increasing the heat exchange area thereof and facilitating later maintenance.

The traditional coil heat exchanger has the advantages that when the rated heat exchange area is fixed, the span of a single whole group of coils is large, so that the manufacturing difficulty is large, the energy of a heat exchange medium cannot be fully converted, and the heat exchange efficiency is low. And the multiunit mosquito coil 31 of this application connects in parallel and parallel arrangement, and reducible its span and refrigerant (also be heat transfer medium) are at the circulation distance of its in, guarantee that its heat exchange efficiency is high and stable, are convenient for make simultaneously and dismouting installation to make things convenient for later maintenance and maintenance.

Referring to fig. 5 and 6, in accordance with the first heat exchanger 21a, the second heat exchanger 21b includes a mosquito coil 211b, a first pipe 213b, a second pipe 212b, and a fixing device 214. Preferably, the mosquito coil 211a of the first heat exchanger 21a and the mosquito coil 211b of the second heat exchanger 21b are stacked in an alternating manner in this order. That is, the

mosquito coil pipes

211a and 211b are alternately arranged in sequence. The plurality of fixing devices 214 simultaneously fix the mosquito coil 211a and the mosquito coil 211 b. So set up, make on the one hand can carry out thermal transmission between the different heat exchangers for heat output is even, and on the other hand has reduced the space that the heat exchanger occupy under the prerequisite of guaranteeing heat transfer area.

In this embodiment, the vapor outlet 11 is connected to the first condensation tank 23a, and the pressure reducing device 3 is connected to the distilled water tank 4. The first refrigeration device 24a is preferably a throttle valve, which is respectively connected with the first heat exchanger 21a and the first condensation tank 23a, and the heat exchange medium is introduced into the first heat exchanger 21a from the first condensation tank 23a through the first compressor unit 22a via a pipeline, in the process, the low-temperature gaseous heat exchange medium is compressed into a high-temperature and high-pressure liquid and/or gaseous state, so as to release a large amount of heat, and then exchanges heat with the waste liquid in the evaporation tank 1 in the first heat exchanger 21a, so as to heat the waste liquid. Then, the liquid heat exchange medium flows through the first refrigeration device 24a through the pipeline and enters the first condensation tank 23a, in the process, the liquid heat exchange medium with the medium temperature and the high pressure in the pipeline is converted into the gaseous heat exchange medium with the low temperature and the low pressure through the throttling function of the first refrigeration device 24a, and simultaneously a large amount of external heat is absorbed, so that the heat exchange is carried out on the steam from the evaporation tank 1 in the first condensation tank 23a, the temperature of the steam is reduced, and the cooling effect is achieved. Preferably, a first air condenser 26a is further disposed between the first refrigeration device 24a and the first heat exchanger 21a to primarily cool the heat exchange medium flowing out of the first heat exchanger 21 a. Similarly, a second air-cooled condenser 26b is provided between the second refrigeration apparatus 24b and the second heat exchanger 21 b.

In the present embodiment, the first condensation tank 23a includes an outer cylinder (not shown) and a cold water pipe group (not shown) provided in the outer cylinder and connected to the evaporation tank 1 and the distilled water tank 4, and the steam generated in the evaporation tank 1 enters the cold water pipe group through a pipeline, is cooled by the heat medium in the outer cylinder, and then enters the distilled water tank 4. The pressure reducing device 3 of the present embodiment is a centrifugal water pump, and is connected to the first condensation tank 23a, the second condensation tank 23b, and the distilled water tank 4. Preferably, the distilled water tank 4 is also provided with a heat exchanger 51 for cooling the steam which is not cooled in the first and

second condensing tanks

23a and 23b, the heat exchanger 51 is provided with a refrigerant and connected to a cooling device 52, and the cooling device 52 circularly cools the refrigerant to lower the temperature of the distilled water in the distilled water tank 4. The cooling device 52 may be a heat pump system, or may be other cooling devices, such as a semiconductor cooling plate. The number of coils in the heat exchanger 51 in the distilled water tank 4 can be selected according to actual needs. The distilled water stored in the distilled water tank 4 is cooled to a predetermined temperature and then discharged through a distilled water discharge line.

Referring to fig. 1 and 4, in the present embodiment, in order to avoid the evaporated steam from carrying other insoluble particles into the first condensation tank 23a, the second condensation tank 23b and the distilled water tank 4, a steam purification device is further disposed in the evaporation tank 1, and is disposed above the first heat exchanger 21a and the second heat exchanger 21b and below the steam outlet 11. The steam purifying device comprises a filtering purifier 15 and an anti-clamping belt baffle 16 which are arranged in sequence from top to bottom. Wherein, a plurality of baffle 16 of preventing smuggleing secretly misplaces along the vertical direction of evaporating pot 1 and sets up. During the rising process of steam formed by the evaporation of the wastewater, foam and other impurities are blocked by the anti-entrainment baffle 16 and attached to the anti-entrainment baffle 16, and gas continuously rises through the interval between the anti-entrainment baffles 16.

In conclusion, the large-throughput low-temperature vacuum evaporator has the following advantages:

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A high-throughput, low-temperature vacuum evaporator, comprising:

2. The high-throughput low-temperature vacuum evaporator according to claim 1, wherein the heat exchanger comprises a plurality of mosquito coil coils which are arranged in parallel and axially parallel, a first pipeline and a second pipeline, wherein an inlet of each mosquito coil is connected with the first pipeline, an outlet of each mosquito coil is connected with the second pipeline, and the heat exchange medium can flow into each mosquito coil through the first pipeline and flow out of the second pipeline.

3. The high-throughput low-temperature vacuum evaporator according to claim 2, wherein each of said coils is arranged such that said heat transfer medium flows from said inlet into the inside of said coil and out from said outlet to the outside.

4. The high-throughput low-temperature vacuum evaporator according to claim 2, wherein the number of the heat pump systems is two, and the mosquito coil pipes of the two heat exchangers are sequentially stacked in a staggered manner.

5. The high-throughput low-temperature vacuum evaporator according to claim 2, wherein the heat exchanger further comprises a fixing device for fixing each of the mosquito coil pipes, the fixing device comprises a fixing plate corresponding to each mosquito coil pipe, and a positioning plate located outside the mosquito coil pipes;

6. The high-throughput low-temperature vacuum evaporator according to claim 1, wherein each group of the heat pump systems further comprises a refrigeration device and a condensation tank, the condensation tank is connected with the steam outlet, the heat exchange medium in the heat exchanger can flow into the refrigeration device and flow back to the compressor unit through the condensation tank; the steam flowing into the condensation tank can be cooled by the heat exchange medium.

7. The large-throughput low-temperature vacuum evaporator according to claim 6, further comprising a distilled water tank, wherein the distilled water tank is connected to the condensing tank and the pressure reducing device.

8. The high throughput low temperature vacuum evaporator according to claim 1, wherein the compressor unit further comprises a suction pipe, the inlet port is disposed on the suction pipe, the suction pipe comprises a main pipe disposed horizontally and a plurality of branch pipes perpendicular to the main pipe, the branch pipes are respectively connected to each compressor and provide gaseous refrigerant into the compressor.

9. The high-throughput cryogenic vacuum evaporator of claim 1, wherein the compressor train further comprises a vent pipe connecting each compressor and the heat exchanger, respectively, the heat exchange medium formed by each compressor being supplied to the heat exchanger via the vent pipe.

10. The high-throughput low-temperature vacuum evaporator according to claim 1, wherein a steam purification device is arranged below the steam outlet, the steam purification device comprises a plurality of anti-entrainment baffles which are arranged above the heat exchanger along the vertical direction of the evaporation tank in a staggered manner, and a filter purifier which is arranged above the anti-entrainment baffles.