A multi-stage heat exchange separator

Abstract

The present invention discloses a multi-stage heat exchange separator, which relates to the technical field of separators, including a cylinder, which is a vertical structure, a bottom head is provided at the bottom of the cylinder, a heat exchange separation chamber is provided in the cylinder, and a raw material medium inlet pipe is provided on one side of the cylinder, and the raw material medium is transported to the heat exchange separation chamber through the raw material medium inlet pipe; a medium distributor and a heat exchange unit are provided in the heat exchange separation chamber, and the cylinder is connected to a vacuum system; the heat exchanger separator of the present invention can realize modular design, and while separating the raw material medium and utilizing the waste heat, the requirements of the heat exchange element for the corrosion resistance of the material are reduced, and the equipment cost is low; the distribution of the raw material medium and the residual liquid medium is more uniform; the erosion and corrosion of the medium distributor is effectively reduced, and the blockage of the downcomer by the precipitated salt and impurities in the medium is reduced; the deposition of impurities is reduced; the separation of gas impurities can be realized; the heat transfer efficiency is high, it can be cleaned online, and the equipment operation cycle is long.

Description

Technical Field

[0001] The present invention relates to the technical field of separators, and in particular to a multi-stage heat exchange separator. Background Art

[0002] Separator is a commonly used process equipment in industry for separating multiphase media. Existing separation technologies generally include three-phase separators, filter separators, cyclone separators, etc. Homogeneous media are generally treated by evaporation and crystallization.

[0003] Traditional three-phase separators use the principle of density difference for separation and are generally used in oil and gas fields and other occasions. The medium is generally oil, gas, and water. For occasions with complex medium environments and large flow rates, the equipment is generally large in size. For occasions with media containing solid impurities, the separated solids need to be manually cleaned regularly.

[0004] Traditional filter separators use the adsorption properties and pore size of the filter element to filter, and can only separate suspended particles and suspended droplets. In environments with dirty media, the filter element needs to be replaced frequently, which is costly and affects the long-term operation of the equipment.

[0005] Traditional cyclone separators use the cyclone separation principle to separate oil, water and gas three-phase mixed media. However, in situations where there are many solid media impurities, the cyclone tube is easily clogged, resulting in a short service life and low long-term effectiveness.

[0006] The above existing separators have the following technical deficiencies:

[0007] Neither traditional three-phase separators nor filter separators can process salt-containing wastewater; in addition, existing structural separators only have separation functions and cannot recycle the waste heat of the raw medium; for homogeneous media such as high-salt water, density difference or gravity cannot be used for separation, and generally, partition-type heat exchange evaporation crystallization and other methods are used for separation. However, since solids and salts are easily precipitated during the heat exchange process, the equipment is easily blocked and causes equipment failure. In addition, the evaporator and separator are generally arranged separately, with more connecting pipelines and a larger footprint; therefore, the present invention proposes a multi-stage heat exchange separator. Summary of the Invention

[0008] The purpose of the present invention is to solve the defects in the prior art and to propose a multi-stage heat exchange separator.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A multi-stage heat exchange separator comprises a cylinder, the cylinder being a vertical structure, a bottom end cap being provided at the bottom of the cylinder, a heat exchange separation chamber being provided in the cylinder, and a raw material medium inlet pipe being provided on one side of the cylinder, through which the raw material medium is transported to the heat exchange separation chamber;

[0011] The heat exchange separation chamber is provided with a medium distributor and a heat exchange unit, and the cylinder is connected to a vacuum pumping system. After the raw material medium enters the heat exchange separation chamber, the medium is stabilized and guided by the medium distributor. The vacuum pumping system is used to reduce the pressure inside the heat exchange separation chamber, so that the raw material medium is vaporized. After the raw material medium is vaporized, a steam medium is formed. The steam medium enters the heat exchange unit. A cold medium inlet pipe is provided on one side of the cylinder. The cold medium is transported to the heat exchange unit through the cold medium inlet pipe. The heat exchange unit is also provided with a cold medium outlet pipe. The steam medium and the cold medium exchange heat through the heat exchange unit to form a condensed water medium.

[0012] A drain pipe 1 is provided at the bottom of the bottom end cap, and the residual liquid medium remaining after the raw material medium is vaporized is discharged through the drain pipe 1;

[0013] A second drain pipe is provided on one side of the cylinder, and the condensed water medium is discharged through the second drain pipe.

[0014] Furthermore, a plurality of heat exchange separation chambers are vertically provided in the cylinder, and two adjacent heat exchange separation chambers are interconnected up and down, and the heat exchange units in the two adjacent heat exchange separation chambers are interconnected through series pipes, and the cold medium is input into each heat exchange unit from bottom to top in sequence through the cold medium inlet pipe, and finally output from the cold medium outlet pipe. In this process, the steam medium and the cold medium realize heat exchange through the heat exchange unit to form a condensed water medium, and the salt impurities therein are precipitated.

[0015] Furthermore, the medium distributor includes a bottom plate fixed to the inner wall of the cylinder, and a medium buffer zone, a medium distribution zone and a downcomer zone are provided on the bottom plate. The medium distribution zone is located between the medium buffer zone and the downcomer zone, and both the medium buffer zone and the medium distribution zone are sloped toward the downcomer zone.

[0016] The medium distribution area is provided with a plurality of guide plates fixed on the top surface of the bottom plate at intervals, and the downcomer area is provided with a downcomer fixed on the lower side of the bottom plate. The two adjacent heat exchange separation chambers are connected to each other up and down through the downcomer, and the bottom end of the downcomer located at the lowest side is connected to a drainage pipe.

[0017] Furthermore, a reducer and a reducer are provided at the bottom end of the downcomer, the reducer and the reducer form an angle of 45° with the vertical direction, and the bottom outlet of the reducer and the reducer is a 30° notch.

[0018] Furthermore, the heat exchange unit includes a shell, and a heat exchange element 1 and a heat exchange element 2 are provided inside the shell. The heat exchange element 1 and the heat exchange element 2 are arranged in parallel up and down, and one end located on the same side is connected to each other through a U-shaped rotary cavity. A cold medium outlet pipe is provided on the side of the heat exchange element 1 opposite to the U-shaped rotary cavity, and a cold medium inlet pipe is provided on the side of the heat exchange element 2 opposite to the U-shaped rotary cavity. The cold medium flows from the cold medium inlet pipe into the heat exchange element 2, and then flows from the U-shaped rotary cavity into the heat exchange element 1;

[0019] A steam distributor is provided on the top of the shell. The steam medium flows through the steam distributor in sequence through the heat exchange element 1 and the heat exchange element 2. During this process, the steam medium and the cold medium exchange heat through the heat exchange element 1 and the heat exchange element 2. After the heat exchange, the steam medium forms a condensed water medium.

[0020] The bottom of the shell is provided with a vacuum port pipe and a condensed water outlet pipe. The vacuum port pipe is connected to the vacuum system through a vacuum pipe. When the vacuum system is running, the pressure in the shell and the heat exchange separation chamber can be reduced, so that the raw material medium can be vaporized into steam medium, and the non-condensable gas can be extracted at the same time.

[0021] The condensed water medium is connected to the drain pipe 2 through the condensed water outlet pipe and is finally discharged from the cylinder.

[0022] Furthermore, a flushing nozzle is provided at a position corresponding to each heat exchange separation chamber inside the cylinder, and the flushing nozzle is connected to the cold medium outlet pipe through a flushing pipe. A first valve is installed on the flushing pipe. When the first valve is opened, the cold medium can be sprayed out from the flushing nozzle for cleaning the inside of the cylinder;

[0023] A sewage outlet pipe is also provided at the bottom of the shell, and the sewage outlet pipe is also connected to the second drain pipe. A second valve is installed on the sewage outlet pipe, and a third valve is installed on the condensed water outlet pipe. The cold medium sprayed by the flushing nozzle flushes the inside of the shell and the heat exchange element 1 and the heat exchange element 2. When the second valve is opened, the sewage is discharged. When the third valve is opened, the condensed water medium can be discharged from the second drain pipe.

[0024] Furthermore, the cylinder is provided with an inspection manhole at a position corresponding to each heat exchange separation cavity;

[0025] There is also an exhaust port on the top of the cylinder;

[0026] An equipment leakage signal port is also provided at the bottom of the bottom head.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The heat exchange separator of the present invention is a vertical multi-stage heat exchange separation device that integrates multiple heat exchange separation chambers and heat exchange units. The heat exchange separation chambers are separated by a medium distributor and a float valve, which can realize an integrated modular design, reduce the connecting pipes between different units, and have a highly compact structure.

[0029] 2. After the raw material medium enters the heat exchange separation chamber, it is vaporized due to the pressure reduction inside the heat exchange separation chamber. The generated steam medium enters the heat exchange unit for condensation. The residual liquid medium after vaporization enters the next stage heat exchange separation chamber through the downcomer, which can avoid direct contact between the raw material medium and the heat exchange unit, realize the separation of the raw material medium and the utilization of residual heat, and avoid the corrosion of the raw material medium and the residual liquid medium on the heat exchange element, reduce the requirements of the heat exchange element for the corrosion resistance of the material, reduce the cost of the heat exchange equipment, and improve the long-term performance.

[0030] 3. The medium distributor consists of a medium buffer zone, a medium distribution zone and a downcomer zone. The medium distribution zone is provided with guide vanes, and the downcomer zone is provided with downcomers. The bottom plate of the medium distributor slopes toward the downcomers, so the distribution of the raw medium and the residual liquid medium is more uniform.

[0031] 4. A reducer is set at the bottom of the downcomer of the medium distributor, with a 45° angle to the vertical direction and a 30° notch at the outlet, which can effectively reduce the erosion and corrosion of the next-level medium distribution plate by the residual liquid, and at the same time reduce the blockage of the downcomer by the salt and impurities precipitated from the raw medium and the residual liquid medium.

[0032] 5. The guide vane of the medium distributor adopts a slope design, which can increase the residence time of the raw medium on the medium distributor, while improving the steady flow of the medium and reducing the salt and impurity deposition in the medium.

[0033] 6. Connect a vacuum system to the heat exchange unit to achieve decompression in the heat exchange separation chamber, vaporize the raw material medium, and at the same time extract the separated non-condensable gas (the gas contained in the steam medium that will not condense into liquid) to achieve the separation of gas impurities.

[0034] 8. The connecting pipes of the upper and lower heat exchange units of the separator are arranged on the same side, which facilitates the arrangement of on-site equipment.

[0035] 9. A flushing pipe is provided at the cold medium outlet pipe of the heat exchange separation chamber, and the flushing pipe is equipped with a flushing nozzle located inside the heat exchange separation chamber, which can realize online cleaning inside the cylinder and extend the equipment operation cycle.

[0036] In summary, the heat exchanger separator of the present invention can realize modular design, can realize the separation of raw material medium and waste heat utilization, and at the same time can reduce the requirements of heat exchange elements for material corrosion resistance, reduce equipment costs; the distribution of raw material medium and residual liquid medium is more uniform; it can effectively reduce the erosion and corrosion of the residual liquid medium of the upper level on the medium distributor of the lower level, and at the same time reduce the blockage of the downcomer by the salt and impurities precipitated in the raw material medium and the residual liquid medium; reduce impurity deposition; can realize the separation of gas impurities; high heat transfer efficiency, small heat exchange unit size; convenient on-site equipment layout; can be cleaned online, and the equipment operation cycle is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a structural side view of the medium distributor in the present invention;

[0040] Figure 3 Schematic diagram of a top view of the guide vane on the bottom plate in the medium distributor;

[0041] Figure 4 It is a structural schematic diagram of the heat exchange unit in the present invention.

[0042] In the figure: 1 cylinder, 2 heat exchange separation chamber, 3 raw medium inlet pipe, 4 medium distributor, 5 heat exchange unit, 6 cold medium inlet pipe, 7 cold medium outlet pipe, 8 vacuum pipe, 9 vacuum system, 10 inspection manhole, 11 series pipe, 12 float valve, 13 flushing nozzle, 14 exhaust port, 15 equipment leakage signal port, 16 base head, 17 drain pipe 1, 18 drain pipe 2, 19 condensate pipe, 20 sewage outlet pipe;

[0043] 101 raw material medium, 102 cold medium, 103 steam medium, 104 condensed water medium, 105 residual liquid medium;

[0044] 40 bottom plate, 41 guide vane, 42 downcomer area, 43 downcomer, 44 medium distribution area, 45 medium buffer area, 46 reducer and reducer;

[0045] 50 shell, 51 heat exchange element 1, 52 heat exchange element 2, 53 steam distributor, 54 U-shaped rotary chamber, 55 cold medium outlet pipe, 56 cold medium inlet pipe, 57 vacuum port pipe, 58 sewage outlet pipe, 59 condensate outlet pipe. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention;

[0047] Reference Figure 1-4 A multi-stage heat exchange separator includes a cylinder 1, which is a vertical structure. A bottom head 16 is provided at the bottom of the cylinder 1. A heat exchange separation chamber 2 is provided in the cylinder 1. A raw material medium inlet pipe 3 is provided on one side of the cylinder 1. The raw material medium 101 is transported to the heat exchange separation chamber 2 through the raw material medium inlet pipe 3.

[0048] A medium distributor 4 and a heat exchange unit 5 are provided in the heat exchange separation chamber 2. The cylinder 1 is externally connected to a vacuum pumping system 9. After the raw material medium 101 (referring to high-salt wastewater in the present invention) enters the heat exchange separation chamber 2, it is stabilized and guided by the medium distributor 4. The vacuum pumping system 9 is used to reduce the pressure inside the heat exchange separation chamber 2, so that the raw material medium 101 is vaporized. After vaporization, the raw material medium 101 forms a steam medium 103, which enters the heat exchange unit 5. A cold medium inlet pipe 6 is provided on one side of the cylinder 1. The cold medium 102 is transported to the heat exchange unit 5 through the cold medium inlet pipe 6. The heat exchange unit 5 is also provided with a cold medium outlet pipe 7. The steam medium 103 and the cold medium 102 exchange heat through the heat exchange unit 5 to form a condensed water medium 104.

[0049] A drain pipe 17 is provided at the bottom of the bottom end cap 16, and the residual liquid medium 105 remaining after the raw material medium 101 is vaporized is discharged through the drain pipe 17;

[0050] A second drain pipe 18 is provided on one side of the cylinder 1 , and the condensed water medium 104 is discharged through the second drain pipe 18 .

[0051] There are multiple heat exchange and separation chambers 2 vertically arranged in the cylinder 1, such as Figure 1 As shown, in this embodiment, three heat exchange separation chambers 2 are provided inside the cylinder 1, and two adjacent heat exchange separation chambers 2 are interconnected up and down. The heat exchange units 5 in two adjacent heat exchange separation chambers 2 are interconnected through a series pipe 11, and the cold medium 102 is sequentially input into each heat exchange unit 5 from bottom to top through the cold medium inlet pipe 6, and finally output from the cold medium outlet pipe 7. During this process, the steam medium 103 and the cold medium 102 realize heat exchange through the heat exchange unit 5 to form a condensed water medium 104, and the salt impurities therein are precipitated.

[0052] like Figure 2 As shown, the medium distributor 4 includes a bottom plate 40 fixed to the inner wall of the cylinder 1, and a medium buffer area 45, a medium distribution area 44 and a downcomer area 42 are provided on the bottom plate 40. The medium distribution area 44 is located between the medium buffer area 45 and the downcomer area 42. The medium buffer area 45 and the medium distribution area 44 are both inclined toward the downcomer area 42.

[0053] The medium distribution area 44 is provided with a plurality of guide plates 41 arranged at intervals and fixed on the top surface of the bottom plate 40, and the downcomer area 42 is provided with a downcomer 43 fixed on the lower side of the bottom plate 40. The two adjacent heat exchange separation chambers 2 are connected to each other in the upper and lower directions through the downcomer 43, and the bottom end of the downcomer 43 located at the lowermost side is connected to the drain pipe 17.

[0054] like Figure 2 As shown, a reducer 46 is provided at the bottom end of the downcomer 43. The reducer 46 forms an angle of 45° with the vertical direction, and the bottom outlet of the reducer 46 is a 30° notch.

[0055] The structural design of the reducer and reducer 46 can effectively reduce the erosion of the residual liquid medium 105 on the next-stage medium distributor 4, while preventing the salt in the residual liquid medium 105 from being separated out and the impurities from clogging the outlet.

[0056] like Figure 3 As shown, the guide plate 41 adopts a sloped design, which can increase the residence time of the raw material medium 101 and the residual liquid medium 105 on the distribution plate, and at the same time improve the flow stability of the medium and prevent the deposition of salt and impurities in the medium.

[0057] The heat exchange unit 5 includes a shell 50, and a heat exchange element 1 51 and a heat exchange element 2 52 are arranged inside the shell 50. The heat exchange element 1 51 and the heat exchange element 2 52 adopt plate heat exchange elements in the prior art, that is, plate heat exchangers.

[0058] Heat exchange element 1 51 and heat exchange element 2 52 are arranged in parallel up and down, and are interconnected at one end on the same side via a U-shaped rotary cavity 54. A cold medium outlet pipe 55 is provided on the side of heat exchange element 1 51 facing away from the U-shaped rotary cavity 54, and a cold medium inlet pipe 56 is provided on the side of heat exchange element 2 52 facing away from the U-shaped rotary cavity 54. Cold medium 102 flows from the cold medium inlet pipe 56 into heat exchange element 2 52, and then flows from the U-shaped rotary cavity 54 into heat exchange element 1 51.

[0059] A steam distributor 53 is provided at the top of the housing 50. The steam medium 103 flows through the steam distributor 53 and sequentially through the heat exchange element 1 51 and the heat exchange element 2 52. During this process, the steam medium 103 exchanges heat with the cold medium 102 through the heat exchange element 1 51 and the heat exchange element 2 52. After the heat exchange, the steam medium 103 forms a condensed water medium 104.

[0060] The bottom of the shell 50 is provided with a vacuum port pipe 57 and a condensed water outlet pipe 59. The vacuum port pipe 57 is connected to the vacuum system 9 through a vacuum pipe 8. When the vacuum system 9 is in operation, the pressure in the shell 50 and the heat exchange separation chamber 2 can be reduced, so that the raw material medium 101 can be vaporized into a steam medium 103. At the same time, non-condensable gas (gas contained in the steam medium 103 that will not condense into liquid) can be extracted.

[0061] The condensed water medium 104 is connected to the drain pipe 2 18 through the condensed water outlet pipe 59 and is finally discharged from the cylinder 1, wherein the condensed water outlet pipe 59 penetrates the head by 200 mm.

[0062] After the raw material medium 101 enters the heat exchange separation chamber 2, it is vaporized due to the pressure reduction inside the heat exchange separation chamber 2, and the generated steam medium 103 enters the heat exchange unit 5 for condensation. The residual liquid medium 105 remaining after vaporization enters the next-level heat exchange separation chamber 2 through the downcomer 43, which can avoid direct contact between the raw material medium 101 and the heat exchange element 1 51 and the heat exchange element 2 52 in the heat exchange unit 5, and can realize the separation of the raw material medium 101 and the utilization of the residual heat. At the same time, it can avoid the corrosion of the raw material medium 101 and the residual liquid medium 105 on the heat exchange element 1 51 and the heat exchange element 2 52, reduce the requirements for the corrosion resistance of the materials of the heat exchange element 1 51 and the heat exchange element 2 52, reduce the cost of the heat exchange equipment, and improve the long-term effectiveness.

[0063] In addition, a flushing nozzle 13 is provided at a position corresponding to each heat exchange separation chamber 2 inside the cylinder 1. The flushing nozzle 13 is connected to the cold medium outlet pipe 7 through a flushing pipe. A first valve is installed on the flushing pipe. When the first valve is opened, the cold medium 102 can be sprayed out from the flushing nozzle 13 for cleaning the inside of the cylinder 1.

[0064] A sewage outlet pipe 58 is also provided at the bottom of the shell 50, and the sewage outlet pipe 58 is also connected to the drain pipe 2 18. A second valve is installed on the sewage outlet pipe 58, and a third valve is installed on the condensed water outlet pipe 59. The cold medium 102 sprayed by the flushing nozzle 13 flushes the interior of the shell 50 and the heat exchange element 1 51 and the heat exchange element 2 52. When the second valve is opened, the sewage is discharged. When the third valve is opened, the condensed water medium 104 can be discharged from the drain pipe 2 18.

[0065] In addition, a maintenance manhole 10 is provided at the position of each heat exchange separation chamber 2 of the cylinder 1; the maintenance manhole 10 facilitates personnel to inspect the interior of the cylinder 1;

[0066] An exhaust port 14 is also provided on the top of the cylinder 1 ; the exhaust port 14 is used to discharge the gas inside the cylinder 1 ; or to install a pressure sensor to detect the air pressure inside the cylinder 1 .

[0067] The bottom of the bottom cover 16 is also provided with an equipment leakage signal port 15 for installing a liquid sensor to detect whether there is leakage in the cylinder 1.

[0068] A float valve 12 is provided at the downcomer area 42 for closing the top of the downcomer 43 at the downcomer area 42 , thereby separating the upper and lower adjacent heat exchange and separation chambers 2 .

Claims

1. A multi-stage heat exchange separator, comprising a cylinder (1), characterized in that: The cylinder (1) is a vertical structure, a bottom end cap (16) is provided at the bottom of the cylinder (1), a heat exchange separation chamber (2) is provided in the cylinder (1), a raw material medium inlet pipe (3) is provided on one side of the cylinder (1), and the raw material medium (101) is transported to the heat exchange separation chamber (2) through the raw material medium inlet pipe (3); The heat exchange separation chamber (2) is provided with a medium distributor (4) and a heat exchange unit (5). The cylinder (1) is externally connected to a vacuum pumping system (9). After the raw material medium (101) enters the heat exchange separation chamber (2), the medium distributor (4) is used to achieve steady flow and flow guidance. The vacuum pumping system (9) is used to reduce the pressure inside the heat exchange separation chamber (2), so that the raw material medium (101) is vaporized. After the raw material medium (101) is vaporized, a steam medium (103) is formed. The steam medium (103) enters the heat exchange unit (5). A cold medium inlet pipe (6) is provided on one side of the cylinder (1). The cold medium (102) is transported to the heat exchange unit (5) through the cold medium inlet pipe (6). The heat exchange unit (5) is also provided with a cold medium outlet pipe (7). The steam medium (103) and the cold medium (102) are heat-exchanged through the heat exchange unit (5) to form a condensed water medium (104). A drain pipe (17) is provided at the bottom of the bottom cover (16), and the residual liquid medium (105) remaining after the raw material medium (101) is vaporized is discharged through the drain pipe (17); A second drain pipe (18) is provided on one side of the cylinder (1), and the condensed water medium (104) is discharged through the second drain pipe (18); A plurality of heat exchange separation chambers (2) are vertically provided in the cylinder (1), and two adjacent heat exchange separation chambers (2) are interconnected vertically. The heat exchange units (5) in the two adjacent heat exchange separation chambers (2) are interconnected via a series pipe (11). The cold medium (102) is sequentially input into each heat exchange unit (5) from bottom to top via the cold medium inlet pipe (6), and finally output from the cold medium outlet pipe (7). During this process, the steam medium (103) and the cold medium (102) are heat-exchanged through the heat exchange unit (5) to form a condensed water medium (104), and salt impurities therein are precipitated; The medium distributor (4) includes a bottom plate (40) fixed to the inner wall of the cylinder (1), and a medium buffer zone (45), a medium distribution zone (44), and a liquid drop zone (42) are provided on the bottom plate (40). The medium distribution zone (44) is located between the medium buffer zone (45) and the liquid drop zone (42), and the medium buffer zone (45) and the medium distribution zone (44) are both inclined toward the liquid drop zone (42). The medium distribution area (44) is provided with a plurality of guide plates (41) fixed to the top surface of the bottom plate (40) at intervals, and the downcomer area (42) is provided with a downcomer (43) fixed to the lower side of the bottom plate (40). The two adjacent heat exchange separation chambers (2) are connected to each other in the upper and lower directions through the downcomer (43), and the bottom end of the downcomer (43) located at the lowermost side is connected to the drain pipe (17); A reducer (46) is provided at the bottom end of the downcomer (43), the reducer (46) forms a 45° angle with the vertical direction, and the bottom outlet of the reducer (46) is a 30° notch.

2. A multi-stage heat exchange separator according to claim 1, characterized in that: The heat exchange unit (5) includes a shell (50), wherein a heat exchange element 1 (51) and a heat exchange element 2 (52) are provided inside the shell (50), the heat exchange element 1 (51) and the heat exchange element 2 (52) are arranged in parallel up and down, and the ends located on the same side are connected to each other through a U-shaped rotary cavity (54), a cold medium outlet pipe (55) is provided on the side of the heat exchange element 1 (51) opposite to the U-shaped rotary cavity (54), and a cold medium inlet pipe (56) is provided on the side of the heat exchange element 2 (52) opposite to the U-shaped rotary cavity (54), and the cold medium (102) flows from the cold medium inlet pipe (56) into the heat exchange element 2 (52), and then flows from the U-shaped rotary cavity (54) into the heat exchange element 1 (51); A steam distributor (53) is provided on the top of the shell (50), and the steam medium (103) flows through the first heat exchange element (51) and the second heat exchange element (52) in sequence through the steam distributor (53). During this process, the steam medium (103) and the cold medium (102) are heat-exchanged through the first heat exchange element (51) and the second heat exchange element (52). After the heat exchange, the steam medium (103) forms a condensed water medium (104). The bottom of the shell (50) is provided with a vacuum port pipe (57) and a condensed water outlet pipe (59). The vacuum port pipe (57) is connected to the vacuum system (9) through a vacuum pipe (8). When the vacuum system (9) is in operation, the pressure in the shell (50) and the heat exchange separation chamber (2) can be reduced, so that the raw material medium (101) can be vaporized into a steam medium (103), and at the same time, the non-condensable gas can be extracted; The condensed water medium (104) is connected to the second drain pipe (18) through the condensed water outlet pipe (59) and is finally discharged from the cylinder (1).

3. A multi-stage heat exchange separator according to claim 2, characterized in that: A flushing nozzle (13) is provided at a position corresponding to each heat exchange separation chamber (2) inside the cylinder (1), and the flushing nozzle (13) is connected to the cold medium outlet pipe (7) through a flushing pipe. A first valve is installed on the flushing pipe. When the first valve is opened, the cold medium (102) can be sprayed out from the flushing nozzle (13) for cleaning the inside of the cylinder (1); The bottom of the shell (50) is also provided with a sewage outlet pipe (58), and the sewage outlet pipe (58) is also connected to the second drain pipe (18). A second valve is installed on the sewage outlet pipe (58), and a third valve is installed on the condensate outlet pipe (59). The cold medium (102) sprayed by the flushing nozzle (13) flushes the interior of the shell (50) and the heat exchange element 1 (51) and the heat exchange element 2 (52). When the second valve is opened, the sewage is discharged. When the third valve is opened, the condensate medium (104) can be discharged from the second drain pipe (18).

4. The multi-stage heat exchange separator according to claim 1, characterized in that: The cylinder (1) is provided with an inspection manhole (10) at a position corresponding to each heat exchange separation chamber (2), an exhaust port (14) is also provided at the top of the cylinder (1), and an equipment leakage signal port (15) is also provided at the bottom of the bottom cover (16).

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