Efficient evaporation separation equipment set

Abstract

The invention provides an efficient evaporation separation equipment set, and relates to the technical field of evaporation separation equipment, the efficient evaporation separation equipment set comprises an evaporator equipment set shell, and the evaporator equipment set shell comprises a first-section falling film evaporator, a second-section falling film evaporator and a short-distance evaporator which are sequentially arranged from top to bottom; through the arrangement of the pressurization vaporization distributor, it can be guaranteed that entering materials are sprayed in a sheet shape, the evaporation area of the materials is increased, efficient evaporation is guaranteed, the pressure difference before and after evaporation is increased, and the flash evaporation effect is guaranteed, so that the evaporation efficiency is greatly improved; the feed liquid distributor and the tooth-shaped downcomer are arranged, so that the distribution uniformity of the feed liquid in the heating pipes can be obviously improved, and the flow rate and the flow velocity of the feed liquid in each heating pipe are more consistent, so that the overall evaporation efficiency is improved, and the stability of the product quality is ensured; and meanwhile, the design of the combined gas-liquid separator is adopted, so that the gas-liquid entrainment problem can be obviously reduced, the product purity is improved, and the product quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of evaporation separation equipment, and particularly to a group of high-efficiency evaporation separation equipment. Background Art

[0002] Evaporation separation equipment is an important basic task in industrial production. The falling film evaporation equipment used in current production devices is a traditional one-stage evaporator separation equipment, which has many drawbacks: firstly, there is a situation of liquid phase reflux entrainment, resulting in low evaporation separation efficiency and huge energy consumption; secondly, the separation effect is poor, making it difficult to meet the increasingly stringent requirements for product purity. With the continuous expansion of industrial production scale and the growing demand for energy conservation and environmental protection, it is of crucial practical significance to develop a group of evaporation separation equipment with high efficiency, energy conservation, excellent separation effect and adaptability to various material characteristics. Summary of the Invention

[0003] To solve the deficiencies of the above prior art, the present invention proposes a group of high-efficiency evaporation separation equipment that can effectively overcome the problems faced by existing evaporation separation equipment, such as low evaporation efficiency, poor separation effect, high energy consumption, complex equipment structure and poor adaptability to temperature-sensitive materials.

[0004] The technical solution of the present invention is realized as follows:

[0005] A group of high-efficiency evaporation separation equipment includes a housing of the evaporation separation equipment group. The housing of the evaporation separation equipment group includes a one-stage falling film evaporator, a two-stage falling film evaporator and a short-path evaporator arranged in sequence from top to bottom, wherein:

[0006] The one-stage falling film evaporator includes a one-stage evaporator cylinder body. One side of the one-stage evaporator cylinder body is provided with a one-stage evaporator feed inlet, a one-stage evaporator heating medium outlet and a one-stage evaporator heating medium inlet, and a one-stage pressurized vaporization distributor and a one-stage downcomer distributor are arranged inside the one-stage evaporator cylinder body. One end of the one-stage pressurized vaporization distributor is communicated with the one-stage evaporator feed inlet;

[0007] The two-stage falling film evaporator includes a two-stage evaporator cylinder body. One side of the two-stage evaporator cylinder body is provided with a two-stage evaporator feed inlet, a two-stage evaporator heating medium outlet and a two-stage evaporator heating medium inlet, and a two-stage pressurized vaporization distributor and a two-stage downcomer distributor are arranged inside the two-stage evaporator cylinder body. Spiral heat exchangers are arranged inside both the two-stage evaporator cylinder body and the one-stage evaporator cylinder body;

[0008] The short-path evaporator includes a short-path evaporator cylinder body. A labyrinth distributor, an internal cooler and a liquid collecting tray are arranged in sequence from top to bottom inside the short-path evaporator cylinder body, and a short-path evaporator discharge pipe orifice is arranged at the bottom of the short-path evaporator cylinder body.

[0009] Preferably, the first-stage pressurized vaporization distributor is equipped with evenly distributed pressurized nozzles, and the second-stage pressurized vaporization distributor has the same structure as the first-stage pressurized vaporization distributor.

[0010] Preferably, the spiral heat exchanger includes a heat exchange tube fixed tube sheet, on which a plurality of heat exchange tubes are installed, and spiral fins are evenly welded on the outer walls of the plurality of heat exchange tubes.

[0011] Preferably, gas phase outlets are provided at the top of the first-stage evaporator cylinder body, and on one side of the second-stage evaporator cylinder body and the short-path evaporator cylinder body. And the three gas phase outlets are respectively provided with a first gas-liquid separator, a second gas-liquid separator and a third gas-liquid separator. Support ears are also installed on the outer wall of the first-stage evaporator cylinder body. Material guiding trays are arranged inside the second-stage evaporator cylinder body and the short-path evaporator cylinder body.

[0012] Preferably, the first-stage downcomer distributor includes a plurality of fixed rods installed on the heat exchange tube fixed tube sheet. A downcomer primary distribution plate and a downcomer secondary distribution plate are jointly installed on the plurality of fixed rods. And distribution plate fixing bolts are screwed on the tops of the plurality of fixed rods. The downcomer secondary distribution plate is below the downcomer primary distribution plate. And secondary distribution plate downcomers are provided on the downcomer secondary distribution plate. Primary distribution plate downcomers are provided on the downcomer primary distribution plate. A plurality of toothed downcomers are also provided on the heat exchange tube fixed tube sheet. The second-stage downcomer distributor has the same structure as the first-stage downcomer distributor.

[0013] Preferably, one end of the labyrinth distributor is provided with a short-path evaporator inlet 1 extending to the outside of the short-path evaporator cylinder body, and the other end is provided with a short-path evaporator inlet 2 extending to the outside of the short-path evaporator cylinder body.

[0014] Preferably, both ends of the built-in cooler extend to the outside of both sides of the short-path evaporator cylinder body, and are respectively provided with a condenser refrigerant inlet and a condenser refrigerant outlet.

[0015] More preferably, the liquid collection tray is of a double-layer structure, and a liquid collection tray outlet pipe extending to the outside of the short-path evaporator cylinder body is provided at the bottom of the liquid collection tray in the lower layer.

[0016] Even more preferably, a heat medium jacket and a tracing coil are sleeved outside the short-path evaporator cylinder body. A short-path evaporator heat medium outlet is provided on one side of the heat medium jacket, and a short-path evaporator heat medium inlet is provided on the other side. The tracing coil is below the heat medium jacket. And one end of the tracing coil is provided with a short-path evaporator bottom tracing outlet, and the other end is provided with a short-path evaporator bottom tracing inlet.

[0017] Most preferably, a scraping mechanism is further provided on the short-path evaporator cylinder body, and the scraping mechanism includes a speed reducer and a motor installed at the bottom of the short-path evaporator cylinder body, and a stirring shaft rotatably installed at the inner bottom of the short-path evaporator cylinder body. The liquid collecting tray is welded to the top of the stirring shaft, and scraping plates are welded to both sides of the liquid collecting tray.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the present invention is in use, through the setting of the pressurized vaporization distributor, it can ensure that the incoming material is sprayed in flakes, increasing the evaporation area of the material and ensuring efficient evaporation; increasing the pressure difference before and after evaporation to ensure the flashing effect, thereby greatly improving the evaporation efficiency; and adopting a new type of liquid distributor and toothed downcomer, which can significantly improve the distribution uniformity of the liquid in the heating tubes, making the liquid flow rate and velocity in each heating tube more consistent, thereby improving the overall evaporation efficiency and ensuring the stability of product quality; at the same time, by adopting the design of the combined gas-liquid separator, the problem of gas-liquid entrainment can be significantly reduced, improving the product purity and ensuring the product quality.

[0020] 2. In the present invention, both the first-stage falling film evaporator and the second-stage falling film evaporator are provided with a feed inlet and a reflux port, improving the operating flexibility of the equipment group; and the inner surface of the heat exchange tube adopts a micro-nano rough structure, and spiral fins are provided on the outer surface, starting from two aspects of increasing heat transfer on the material side and heat transfer on the heating medium side respectively, greatly improving the heat transfer coefficient, while reducing the fouling and blockage phenomena on the surface of the heating tubes, reducing the equipment maintenance cost, extending the service life of the equipment, and thus saving energy and reducing consumption; the evaporation section of the short-path evaporator is set shorter, solving the problems of the formation of condensate reflux of the evaporated gaseous material and the deterioration of the material due to long residence time, and the built-in cooler solves the problem of the reflux of easily liquefied materials, directly cooling through the built-in cooler, collecting in the liquid collecting tray and externally extracting, improving the purity of the product and making the types of materials applicable to the equipment more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is the structural schematic diagram of the first-stage evaporator cylinder body of the present invention;

[0024] Figure 3It is a schematic structural diagram of the cylinder body of the second-stage evaporator of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the cylinder body of the short-path evaporator of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the built-in cooler of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the downcomer of the first-stage distribution plate, the downcomer of the second-stage distribution plate and the toothed downcomer of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the pressurized vaporization distributor of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the heat exchange tube of the present invention;

[0030] Figure 9 It is a schematic structural diagram of the pressurized nozzle of the present invention.

[0031] In the figure: 1. Cylinder body of the first-stage evaporator; 2. Cylinder body of the second-stage evaporator; 3. Cylinder body of the short-path evaporator; 4. First gas-liquid separator; 5. Second gas-liquid separator; 6. Third gas-liquid separator; 7. First-stage pressurized vaporization distributor; 8. Second-stage pressurized vaporization distributor; 9. Labyrinth distributor; 10. First-stage downcomer distributor; 11. Second-stage downcomer distributor; 12. Heat exchange tube; 13. Built-in cooler; 14. Liquid collection tray; 15. Scraper; 16. Reducer; 17. Motor; 18. Support ear; 19. Feed inlet of the first-stage evaporator; 20. Heat medium outlet of the first-stage evaporator; 21. Heat medium inlet of the first-stage evaporator; 22. Feed inlet of the second-stage evaporator; 23. Heat medium outlet of the second-stage evaporator; 24. Heat medium inlet of the second-stage evaporator; 25. First inlet of the short-path evaporator; 26. Second inlet of the short-path evaporator; 27. Heat medium outlet of the short-path evaporator; 28. Heat medium inlet of the short-path evaporator; 29. Bottom heat tracing outlet of the short-path evaporator; 30. Bottom heat tracing inlet of the short-path evaporator; 31. Discharge pipe orifice of the short-path evaporator; 32. Refrigerant inlet of the condenser; 33. Refrigerant outlet of the condenser; 34. Material guiding plate; 35. Outlet pipe orifice of the liquid collection tray; 36. Pressurized nozzle; 37. Spiral fin; 38. First-stage distribution plate of the downcomer; 39. Second-stage distribution plate of the downcomer; 40. Downcomer of the first-stage distribution plate; 41. Fixing bolt of the distribution plate; 42. Toothed downcomer; 43. Fixed tube sheet of the heat exchange tube; 44. Downcomer of the second-stage distribution plate. Detailed implementation mode

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention provides an efficient evaporation separation equipment group as Figures 1 - 9 shown, which includes a housing of the evaporation equipment group. The housing of the evaporation equipment group includes a first-stage falling-film evaporator, a second-stage falling-film evaporator, and a short-path evaporator arranged in sequence from top to bottom. Among them:

[0034] The first-stage falling-film evaporator includes a first-stage evaporator cylinder body 1. One side of the first-stage evaporator cylinder body 1 is provided with a first-stage evaporator feed port 19, a first-stage evaporator heat medium outlet 20, and a first-stage evaporator heat medium inlet 21. And a first-stage pressurized vaporization distributor 7 and a first-stage downcomer distributor 10 are arranged inside the first-stage evaporator cylinder body 1. One end of the first-stage pressurized vaporization distributor 7 is communicated with the first-stage evaporator feed port 19;

[0035] The two-stage falling film evaporator includes a two-stage evaporator cylinder body 2. On one side of the two-stage evaporator cylinder body 2, there are a two-stage evaporator feed port 22, a two-stage evaporator heating medium outlet 23, and a two-stage evaporator heating medium inlet 24. Inside the two-stage evaporator cylinder body 2, there are a two-stage pressurized vaporization distributor 8 and a two-stage downcomer distributor 11. Inside both the two-stage evaporator cylinder body 2 and the first-stage evaporator cylinder body 1, there are spiral heat exchangers. Uniformly distributed pressurized nozzles 36 are installed on the first-stage pressurized vaporization distributor 7. The two-stage pressurized vaporization distributor 8 has the same structure as the first-stage pressurized vaporization distributor 7. The spiral heat exchanger includes a heat exchange tube fixed tube sheet 43. A plurality of heat exchange tubes 12 are installed on the heat exchange tube fixed tube sheet 43. On the outer walls of the plurality of heat exchange tubes 12, uniformly distributed spiral fins 37 are welded. The inner surface of the heat exchange tube 12 is subjected to micro-nano roughening treatment of the inner surface of the heating tube by a special processing technology. The first-stage downcomer distributor 10 includes a plurality of fixed rods installed on the heat exchange tube fixed tube sheet 43. A downcomer primary distribution plate 38 and a downcomer secondary distribution plate 39 are jointly installed on the plurality of fixed rods. At the tops of the plurality of fixed rods, distribution plate fixing bolts 41 are screwed. The downcomer secondary distribution plate 39 is below the downcomer primary distribution plate 38. On the downcomer secondary distribution plate 39, there are secondary distribution plate downcomers 44. On the downcomer primary distribution plate 38, there are primary distribution plate downcomers 40. A plurality of toothed downcomers 42 are also provided on the heat exchange tube fixed tube sheet 43. The two-stage downcomer distributor 11 has the same structure as the first-stage downcomer distributor 10. Among them, the pressurized nozzles 36 are fixed by threaded connection, which is convenient for disassembly and assembly and easy to assemble. The toothed downcomers 42 are fixed in an inserted manner, which is convenient for maintenance and cleaning. The downcomer primary distribution plate 38 and the downcomer secondary distribution plate 39 are fixed by stacked nuts, which is convenient for maintenance. It has high evaporation efficiency, high product purity, simple operation, and good evaporation and separation effects on various materials.

[0036] The short-path evaporator includes a short-path evaporator cylinder body 3. Inside the short-path evaporator cylinder body 3, a labyrinth distributor 9, a built-in cooler 13, and a liquid collection tray 14 are arranged in sequence from top to bottom. At the bottom of the short-path evaporator cylinder body 3, there is a short-path evaporator discharge pipe orifice 31. The liquid collection tray 14 has a double-layer structure. At the bottom of the lower-layer liquid collection tray 14, there is a liquid collection tray outlet pipe orifice 35 extending to the outside of the short-path evaporator cylinder body 3. The lower-layer liquid collection tray 14 is used for external extraction of condensate. One end of the labyrinth distributor 9 is provided with a short-path evaporator inlet one 25 extending to the outside of the short-path evaporator cylinder body 3, and the other end is provided with a short-path evaporator inlet two 26 extending to the outside of the short-path evaporator cylinder body 3. Both ends of the built-in cooler 13 extend to the outside of both sides of the short-path evaporator cylinder body 3 and are respectively provided with a condenser refrigerant inlet 32 and a condenser refrigerant outlet 33.

[0037] Furthermore, gas phase outlets are provided at the top of the first-stage evaporator cylinder body 1, as well as on one side of the second-stage evaporator cylinder body 2 and the short-path evaporator cylinder body 3. A first gas-liquid separator 4, a second gas-liquid separator 5, and a third gas-liquid separator 6 are respectively provided at the three gas phase outlets. Support lugs 18 are also installed on the outer wall of the first-stage evaporator cylinder body 1. Material guiding trays 34 are provided inside both the second-stage evaporator cylinder body 2 and the short-path evaporator cylinder body 3.

[0038] Through the above, when evaporating and separating the material, the material is first fed into the first-stage pressurized vaporization distributor 7 through the first-stage evaporator feed port 19, and the material is sprayed onto the first-stage downcomer distributor 10 through the pressurized nozzle 36. At this time, the material first falls on the first-stage downcomer distribution tray 38, and a small amount of particulate matter can be retained in the first-stage downcomer distribution tray 38 to reduce blockage. When the liquid level reaches the height of the first-stage distribution tray downcomer 40, it is evenly discharged onto the second-stage downcomer distribution tray 39 through the first-stage distribution tray downcomer 40. When the liquid level reaches the height of the second-stage distribution tray downcomer 44, it is evenly distributed and flows onto the heat exchange tube fixed tube sheet 43 (the diameter of the second-stage distribution tray downcomer 44 is smaller than that of the first-stage distribution tray downcomer 40, and the number is higher than that of the first-stage distribution tray downcomer 40 to ensure more uniform distribution). After the liquid enters the heat exchange tube fixed tube sheet 43 and the liquid level reaches the tooth-shaped high point on the tooth-shaped downcomer 42, the liquid evenly flows into the heat exchange tube 12 along each tooth-shaped point to ensure uniform film formation. At this time, the heat medium is input into the first-stage evaporator cylinder 1 through the first-stage evaporator heat medium inlet 21 and discharged through the first-stage evaporator heat medium outlet 20, and this cycle is repeated to heat the liquid in the heat exchange tube 12, causing the material to evaporate. After evaporation, the gas phase rises and is separated by the first gas-liquid separator 4 and then discharged from the gas phase outlet at the top of the first-stage evaporator cylinder 1. The liquid in the heat exchange tube 12 is then fed into the second-stage pressurized vaporization distributor 8 through the second-stage evaporator feed port 22 through a pipeline, and then evenly discharged onto the second-stage downcomer distributor 11 by the second-stage pressurized vaporization distributor 8. Similarly, the liquid evenly flows into the heat exchange tube 12 inside the second-stage evaporator cylinder 2 through the second-stage downcomer distributor 11, and then the heat medium is added into the second-stage evaporator cylinder 2 through the second-stage evaporator heat medium inlet 24 and discharged through the second-stage evaporator heat medium outlet 23, and this cycle is repeated to heat the liquid in the heat exchange tube 12, causing the material to evaporate again. After evaporation, the gas phase rises and is separated by the second gas-liquid separator 5 and then discharged from the gas phase outlet, while the liquid is fed into the labyrinth distributor 9 through the short-path evaporator inlet 1 25 and the short-path evaporator inlet 2 26 through a pipeline, and then evenly flows down under the action of the labyrinth distributor 9. At this time, the refrigerant is added into the built-in cooler 13 through the condenser refrigerant inlet 32, and then the refrigerant is discharged through the condenser refrigerant outlet 33, and this cycle is repeated to condense the liquid through the built-in cooler 13. At this time, the liquid collecting tray 14 collects the condensate and discharges it for external extraction through the liquid collecting tray outlet pipe orifice 35, while the material is discharged through the short-path evaporator discharge pipe orifice 31, thereby realizing the evaporation and separation of the material.

[0039] Meanwhile, in this embodiment, as Figure 1 and Figure 4As shown in the figure, a heat medium jacket and a tracing coil are also sleeved outside the short-path evaporator cylinder body 3. A short-path evaporator heat medium outlet 27 is arranged on one side of the heat medium jacket, and a short-path evaporator heat medium inlet 28 is arranged on the other side. The tracing coil is located below the heat medium jacket. One end of the tracing coil is provided with a short-path evaporator bottom tracing outlet 29, and the other end is provided with a short-path evaporator bottom tracing inlet 30. Specifically, a vent and drain pipe orifice is also arranged on the heat medium jacket, and return water pipe orifices are arranged on both the tracing coil and the built-in cooler 13.

[0040] When the material is evaporated and separated in the short-path evaporator cylinder body 3, the heat medium can be added into the heat medium jacket through the short-path evaporator heat medium inlet 28, and then the heat medium is discharged through the short-path evaporator heat medium outlet 27, and circulated in this way, so that the heat medium jacket conducts auxiliary heating on the inside of the short-path evaporator cylinder body 3. At the same time, the tracing medium can be added into the tracing coil through the short-path evaporator bottom tracing inlet 30, and then the tracing medium is discharged through the short-path evaporator bottom tracing outlet 29, and circulated in this way, so that the tracing coil conducts auxiliary heating on the inside of the short-path evaporator cylinder body 3, so as to keep the inside of the short-path evaporator cylinder body 3 at the required temperature, thereby ensuring the effective evaporation and separation of the material in the short-path evaporator cylinder body 3.

[0041] In addition, in one embodiment, as Figure 1 and Figure 4 shown, a scraping mechanism is also arranged on the short-path evaporator cylinder body 3, and the scraping mechanism includes a speed reducer 16 and a motor 17 installed at the bottom of the short-path evaporator cylinder body 3, and a stirring shaft rotatably installed at the bottom inside the short-path evaporator cylinder body 3. A liquid collecting tray 14 is welded to the top of the stirring shaft, and scraping plates 15 are welded to both sides of the liquid collecting tray 14.

[0042] When the material is evaporated and separated in the short-path evaporator cylinder body 3, the stirring shaft can be driven to rotate by the motor 17 and the speed reducer 16, and then the stirring shaft drives the liquid collecting tray 14 and the scraping plates 15 to rotate. At this time, the scraping plates 15 stir the material, so that the material forms a large-area film on the inner side of the short-path evaporator cylinder body 3, thereby promoting the efficient evaporation and separation of the material and improving the evaporation and separation efficiency.

[0043] The above are only the 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 principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-efficiency evaporation separation equipment group, characterized in that: The evaporator device group shell includes a first-stage falling film evaporator, a second-stage falling film evaporator and a short-path evaporator arranged in sequence from top to bottom, wherein: The one-stage falling film evaporator comprises an evaporator cylinder (1), one side of which is provided with an evaporator feed port (19), an evaporator heat medium outlet (20) and an evaporator heat medium inlet (21), and the interior of the one-stage evaporator cylinder (1) is provided with a pressurized vaporization distributor (7) and a downcomer distributor (10), and one end of the pressurized vaporization distributor (7) is connected to the evaporator feed port (19); The two-stage falling film evaporator comprises a two-stage evaporator cylinder (2), one side of which is provided with a two-stage evaporator feed port (22), a two-stage evaporator heat medium outlet (23) and a two-stage evaporator heat medium inlet (24), and the interior of the two-stage evaporator cylinder (2) is provided with a two-stage booster vaporization distributor (8) and a two-stage downcomer distributor (11), and the interiors of the two-stage evaporator cylinder (2) and the one-stage evaporator cylinder (1) are both provided with spiral heat exchangers; The short-path evaporator comprises a short-path evaporator cylinder (3), wherein a labyrinth distributor (9), a built-in cooler (13) and a liquid collecting tray (14) are arranged in sequence from top to bottom inside the short-path evaporator cylinder (3), and a short-path evaporator discharge pipe opening (31) is arranged at the bottom of the short-path evaporator cylinder (3).

2. The high-efficiency evaporation separation equipment group according to claim 1 is characterized in that: The one-stage boosting vaporization distributor (7) is provided with evenly distributed boosting nozzles (36), and the two-stage boosting vaporization distributor (8) has the same structure as the one-stage boosting vaporization distributor (7).

3. The high-efficiency evaporation separation equipment group according to claim 1 is characterized in that: The spiral heat exchanger comprises a heat exchange tube fixed tube sheet (43), a plurality of heat exchange tubes (12) are mounted on the heat exchange tube fixed tube sheet (43), and the outer walls of the plurality of heat exchange tubes (12) are welded with evenly distributed spiral fins (37).

4. The high-efficiency evaporation separation equipment group according to claim 1 is characterized in that: Gas phase outlets are provided at the top of the first-stage evaporator cylinder (1) and at one side of the second-stage evaporator cylinder (2) and the short-path evaporator cylinder (3), and the three gas phase outlets are respectively provided with a first gas-liquid separator (4), a second gas-liquid separator (5) and a third gas-liquid separator (6). A support ear (18) is also installed on the outer wall of the first-stage evaporator cylinder (1), and a material diversion plate (34) is provided inside the second-stage evaporator cylinder (2) and the short-path evaporator cylinder (3).

5. The high-efficiency evaporation separation equipment group according to claim 3 is characterized in that: The one-stage downcomer distributor (10) comprises a plurality of fixing rods mounted on a heat exchange tube fixed tube sheet (43), a first-stage downcomer distribution plate (38) and a second-stage downcomer distribution plate (39) being mounted on the plurality of fixing rods, and distribution plate fixing bolts (41) are screwed onto the tops of the plurality of fixing rods, the second-stage downcomer distribution plate (39) is located below the first-stage downcomer distribution plate (38), and a second-stage distribution plate downcomer (44) is arranged on the second-stage downcomer distribution plate (39), a first-stage distribution plate downcomer (40) is arranged on the first-stage downcomer distribution plate (38), and a plurality of toothed downcomers (42) are also arranged on the heat exchange tube fixed tube sheet (43). The two-stage downcomer distributor (11) has the same structure as the one-stage downcomer distributor (10).

6. The high-efficiency evaporation separation equipment group according to claim 1, characterized in that: One end of the labyrinth distributor (9) is provided with a short-path evaporator inlet 1 (25) extending to the outside of the short-path evaporator cylinder (3), and the other end is provided with a short-path evaporator inlet 2 (26) extending to the outside of the short-path evaporator cylinder (3).

7. The high-efficiency evaporation separation equipment group according to claim 1 is characterized in that: Both ends of the built-in cooler (13) extend to both sides of the exterior of the short-path evaporator cylinder (3), and are respectively provided with a condenser refrigerant inlet (32) and a condenser refrigerant outlet (33).

8. The high-efficiency evaporation separation equipment group according to claim 1 is characterized in that: The liquid collecting pan (14) is a double-layer structure, and the bottom of the liquid collecting pan (14) in the lower layer is provided with a liquid collecting pan outlet pipe opening (35) extending to the outside of the short-path evaporator cylinder (3).

9. The high-efficiency evaporation separation equipment group according to claim 1, characterized in that: The short-path evaporator cylinder (3) is also covered with a heat medium jacket and a heating coil. A short-path evaporator heat medium outlet (27) is provided on one side of the heat medium jacket, and a short-path evaporator heat medium inlet (28) is provided on the other side. The heating coil is located below the heat medium jacket, and a short-path evaporator bottom heating outlet (29) is provided at one end of the heating coil, and a short-path evaporator bottom heating inlet (30) is provided at the other end.

10. The high-efficiency evaporation separation equipment group according to claim 1, characterized in that: The short-path evaporator cylinder (3) is also provided with a scraping mechanism, and the scraping mechanism comprises a reducer (16) and a motor (17) mounted at the bottom of the short-path evaporator cylinder (3), and a stirring shaft rotatably mounted at the bottom of the short-path evaporator cylinder (3); the liquid collecting pan (14) is welded to the top of the stirring shaft, and scrapers (15) are welded on both sides of the liquid collecting pan (14).

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