Steam stripping falling film evaporator applied to protein production

Abstract

The utility model relates to the technical field of steam stripping falling film evaporators, and provides a steam stripping falling film evaporator applied to protein production, which comprises a tube box and a material distributor, the tube box comprises an evaporator main body, two blocking plates, a plurality of heat exchange tubes, a steam tube, an air inlet tube and a feeding tube; the steam pipe and the air inlet pipe are both fixed to the peripheral side of the evaporator body in a sealed mode, the steam pipe is located between the two blocking plates, and the air inlet pipe is located above the two blocking plates. The feeding pipe is fixed to the top side of the evaporator body in a sealed mode and communicated with the interior of the evaporator body. And the material distributor is arranged in the evaporator main body. By arranging the material distributor, materials can uniformly flow into the heat exchange pipe, and by arranging the air inlet pipe, circulating air is introduced into the evaporator main body, so that the flowing speed of the materials can be increased by utilizing the circulating air, and the heating efficiency of the materials can also be increased, thereby improving the operation efficiency of the evaporator.

Description

Technical Field

[0001] The utility model relates to the technical field of stripping falling film evaporators, in particular to a stripping falling film evaporator applied to protein production. Background Art

[0002] Protein is the material basis of the morphological structure of organisms. In addition to high-quality protein and vegetable oil, soybeans also contain various physiologically active substances beneficial to human health, such as soy isoflavones, soy phospholipids, soy polypeptides, soy dietary fiber, etc., which play an inestimable role in human health. In addition, soybeans can reduce cholesterol and prevent heart disease, and soy protein also helps prevent breast cancer. During the production process of soy protein, since the non-protein components in the raw materials are still relatively high, in order to meet the needs of food processing and food nutrition, a stripping falling film evaporator is usually used to concentrate soy protein.

[0003] The utility model with the patent publication number CN213912354U discloses a novel evaporator distribution plate, which includes a first tube sheet and a second tube sheet arranged in sequence from top to bottom; a first distribution hole is arranged on the first tube sheet; a second distribution hole is arranged on the second tube sheet; the second distribution holes are multiple and are distributed around the projection position of the first distribution hole, there are more than three second distribution holes, and they are evenly distributed around the projection position of the first distribution hole; there are six second distribution holes, and the first distribution holes are multiple and are evenly distributed on the first tube sheet. In this utility model, the material distribution is uniform. When heating and evaporating the material, coking, wall sticking and pipe blocking will not occur, the service life of the equipment is prolonged, and the production efficiency of the evaporator is improved.

[0004] In the above technical solution, in order to improve the processing efficiency of the evaporator, a first tube sheet and a second tube sheet are provided to evenly distribute the material. However, the material naturally falls under the action of gravity in the evaporator and the heat exchange tubes, and its flow velocity performance is relatively poor, which is not conducive to improving the operating efficiency of the evaporator. Summary of the Utility Model

[0005] In view of this, the utility model provides a stripping falling film evaporator applied to protein production, which can accelerate the falling speed of the material and improve the operating efficiency of the evaporator.

[0006] The technical solution of the utility model is realized as follows: The utility model provides a stripping falling film evaporator applied to protein production, which includes a tube box and a material distributor. The tube box includes an evaporator main body, two blanking plates, a plurality of heat exchange tubes, a steam tube, an air inlet tube and a feed tube, wherein,

[0007] The two blanking plates are hermetically fixed in the evaporator main body and are arranged at intervals;

[0008] The heat exchange tubes are fixedly penetrated between the two end plates and are hermetically connected thereto;

[0009] The steam pipe and the inlet pipe are both hermetically fixed on the peripheral side of the evaporator body and are communicated with its interior. The steam pipe is located between the two end plates, and the inlet pipe is located above the two end plates;

[0010] The feed pipe is hermetically fixed on the top side of the evaporator body and is communicated with its interior;

[0011] The material distributor is arranged in the evaporator body and is located between the heat exchange tubes and the feed pipe, and is used for evenly distributing the material entering the evaporator body through the feed pipe into each of the heat exchange tubes.

[0012] On the basis of the above technical solutions, preferably, the material distributor includes a receiving tray. The receiving tray is fixedly arranged in the evaporator body and is located between the heat exchange tubes and the feed pipe. A plurality of material holes are formed in the receiving plate.

[0013] More preferably, the feed pipe penetrates through the evaporator body;

[0014] The material distributor includes an impact plate. The impact plate is fixedly arranged at one end of the feed pipe located inside the evaporator body, is arranged at an interval therewith, and the impact plate is perpendicular to the axis of the feed pipe.

[0015] More preferably, the material distributor further includes a retaining wall. The retaining wall is fixedly arranged on the top side of the receiving tray, and a plurality of the material holes are located inside the retaining wall.

[0016] More preferably, the receiving tray and the retaining wall are both arranged in a vertically arranged manner and there are two of each, and the two correspond to each other one by one;

[0017] The impact plate is located inside the upper retaining wall, and the axis of the inlet pipe intersects with the lower retaining wall.

[0018] More preferably, the positions of the plurality of material holes on the upper receiving tray correspond to the positions of the upper ends of the heat exchange tubes one by one and are alternately arranged with the positions of the plurality of material holes on the lower receiving tray.

[0019] More preferably, the evaporator body includes a cylinder body and two covers. Among them,

[0020] The two end plates are respectively hermetically fixed at both ends of the cylinder body, and the steam pipe is fixedly penetrated on the peripheral side of the cylinder body;

[0021] The two enclosures are detachably fixed to both ends of the cylinder body, and the air inlet pipe and the feed pipe are fixedly penetrated in the upper enclosure.

[0022] The material distributor further includes a fixator which is detachably fixed to the upper plug plate and is detachably and fixedly connected to the two receiving trays.

[0023] More preferably, the fixator includes a sleeve, a first screw, a first abutting rod, a second abutting rod, a second screw and a nut, wherein,

[0024] The sleeve is fixedly arranged between the two receiving trays;

[0025] The first screw is threadedly connected to the upper plug plate;

[0026] The first abutting rod is fixedly arranged on the first screw and abuts against the bottom side of the lower receiving tray;

[0027] The second abutting rod is fixedly arranged on the first abutting rod, penetrates through the lower receiving tray and abuts against the bottom side of the upper receiving tray, and the second abutting rod is located inside the sleeve;

[0028] The second screw is fixedly arranged on the second abutting rod and penetrates through the upper receiving tray;

[0029] The nut is threadedly connected to the second screw and abuts against the top side of the upper receiving tray.

[0030] On the basis of the above technical solutions, preferably, the steam pipe includes a steam inlet pipe and a steam outlet pipe, and the steam inlet pipe and the steam outlet pipe are fixedly arranged on the peripheral side of the evaporator body in a vertically arranged manner;

[0031] The outer diameter of the position on the evaporator body where the steam inlet pipe is arranged is larger than the outer diameter of the position where the steam inlet pipe is not arranged.

[0032] More preferably, the tube box further includes a discharge pipe, an evaporate discharge pipe, a liquid level control pipe and an exhaust pipe, wherein,

[0033] The discharge pipe is fixedly arranged at the bottom side of the evaporator body and is communicated therewith

[0034] The evaporate discharge pipe, the liquid level control pipe and the exhaust pipe are all hermetically fixed on the peripheral side of the evaporator body and are communicated with its interior.

[0035] The stripping falling-film evaporator for protein production of the present utility model has the following beneficial effects compared with the prior art:

[0036] (1) By providing a material distributor, the material can flow evenly into the heat exchange tubes. By providing an intake pipe to introduce circulating gas into the evaporator main body, not only can the circulating gas be used to accelerate the flow rate of the material, but also the heating efficiency of the material can be increased, thereby improving the operating efficiency of the present evaporator;

[0037] (2) By providing an impact plate, the problem of the receiving tray being deformed due to the direct impact of the material on the receiving tray can be avoided. By providing two receiving trays, the distribution uniformity of the material can be improved. By providing a retaining wall, the splashing range of the material can be reduced and the influence of the circulating gas on the distribution of the material can be avoided, thereby ensuring that the material evenly falls into the heat exchange tubes;

[0038] (3) By providing a cylinder body, a cover and a fixator, the disassembly and assembly of the tube box and the material distributor can be facilitated for the subsequent maintenance operation of the present evaporator. By providing a liquid level control pipe, it can cooperate with the liquid level sensor to warn the operator of the liquid level height of the concentrated material, thereby improving the convenience of use of the present evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a cross-sectional view of the material distributor in the stripping falling-film evaporator for protein production of the present utility model;

[0041] Figure 2 is Figure 1 the enlarged view of part A in

[0042] Figure 3 It is a cross-sectional view of the stripping falling-film evaporator for protein production of the present utility model;

[0043] Figure 4 It is a top view of the stripping falling-film evaporator for protein production of the present utility model.

[0044] Wherein: 1. Tube sheet; 11. Evaporator body; 111. Cylinder; 112. Enclosure; 12. Plug plate; 13. Heat exchange tube; 14. Steam pipe; 15. Inlet pipe; 16. Feed pipe; 17. Discharge pipe; 18. Evaporation product discharge pipe; 19. Liquid level control pipe; 10. Exhaust pipe; 141. Steam inlet pipe; 142. Steam outlet pipe; 2. Material distributor; 21. Receiving tray; 22. Impact plate; 23. Enclosure; 24. Fixer; 241. Sleeve; 242. First screw; 243. First abutting rod; 244. Second abutting rod; 245. Second screw; 246. Nut; 201. Material hole. Detailed implementation manners

[0045] The technical solutions in the present utility model will be clearly and completely described below in conjunction with the specific implementation manners of the present utility model. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0046] As Figures 1-4 shown, a stripping falling film evaporator applied to protein production of the present utility model includes a tube sheet 1 and a material distributor 2.

[0047] The tube sheet 1 is used to concentrate the soybean protein raw material (hereinafter referred to as material). The tube sheet 1 includes an evaporator body 11, two plug plates 12, a plurality of heat exchange tubes 13, a steam pipe 14, an inlet pipe 15 and a feed pipe 16. The two plug plates 12 are hermetically fixed inside the evaporator body 11 and are arranged at intervals; the heat exchange tubes 13 are fixedly penetrated between the two plug plates 12 and are hermetically connected thereto; the steam pipe 14 is hermetically fixed on the periphery of the evaporator body 11 and is communicated with its interior. The steam pipe 14 is located between the two plug plates 12; the feed pipe 16 is hermetically fixed on the top side of the evaporator body 11 and is communicated with its interior; as Figure 3 shown, steam enters the evaporator body 11 through the steam pipe 14 and is located between the two plug plates 12. At the same time, the material enters the interior of the evaporator body 11 through the feed pipe 16 and then enters the heat exchange tubes 13. The material in the heat exchange tubes 13 exchanges heat with the steam, thereby increasing the temperature to evaporate the moisture inside the material and achieving the concentration effect.

[0048] The inlet pipe 15 is hermetically fixed on the periphery of the evaporator body 11. The inlet pipe 15 is located above the two plug plates 12; as Figure 1As shown in the figure, by filling the evaporator main body 11 with circulating gas through the intake pipe 15, a thrust can be provided for the flow of the material, thereby accelerating the flow rate of the material. At the same time, the circulating gas will also heat up during the flow process. By using its contact with the material, the heating efficiency of the material can also be accelerated, thereby improving the operating efficiency of this evaporator.

[0049] The material distributor 2 is used to evenly distribute the material entering the evaporator main body 11 through the feed pipe 16 into each heat exchange tube 13, improving the concentration efficiency of the material. The material distributor 2 is arranged in the evaporator main body 11 and is located between the heat exchange tube 13 and the feed pipe 16.

[0050] As Figure 1 shown in the figure, the material distributor 2 includes a receiving tray 21, an impact plate 22, a retaining wall 23 and a fixer 24. The receiving tray 21 is fixedly arranged in the evaporator main body 11 and is located between the heat exchange tube 13 and the feed pipe 16. A plurality of material holes 201 are provided in the receiving plate. When the material enters the evaporator main body 11 from the feed pipe 16 and touches the receiving tray 21, it can uniformly fall from each material hole 201, thereby preventing the material from falling into several heat exchange tubes 13 in the middle position.

[0051] In order to prevent the material from falling along the inner wall of the evaporator main body 11, it is preferred that the feed pipe 16 penetrates the evaporator main body 11, that is, a section of interval is provided between its inner end and the inner wall of the evaporator main body 11; the impact plate 22 is fixedly arranged at one end of the feed pipe 16 located in the evaporator main body 11. When the material enters the evaporator main body 11, it first contacts the impact plate 22. The impact plate 22 can buffer the material and prevent the material from directly impacting the receiving tray 21 and causing the receiving tray 21 to be squeezed and deformed. The impact plate 22 is arranged at an interval from one end of the feed pipe 16 located in the evaporator main body 11, and the impact plate 22 is perpendicular to the axis of the feed pipe 16, so that the material can be evenly scattered onto the receiving tray 21 after impacting the impact plate 22.

[0052] The retaining wall 23 is used to store the material on the receiving tray 21 and prevent it from flowing to the periphery of the receiving tray 21. The retaining wall 23 is fixedly arranged on the top side of the receiving tray 21, and a plurality of material holes 201 are located inside the retaining wall 23, so that the material only passes through the material holes 201.

[0053] As Figure 1 shown in the figure, in order to improve the effect of the material distributor 2 in evenly distributing the material, it is preferred that both the receiving tray 21 and the retaining wall 23 are arranged in a vertically arranged manner with two, and they correspond to each other one by one; the impact plate 22 is located inside the upper retaining wall 23 to prevent the material from splashing outside the upper retaining wall 23 after impacting the impact plate 22, and the axis of the intake pipe 15 intersects with the lower retaining wall 23, so as to prevent the introduction of the circulating gas from affecting the distribution of the material.

[0054] As Figure 2 shown, the positions of the plurality of material holes 201 on the upper receiving tray 21 correspond one-to-one with the positions of the upper ends of the heat exchange tubes 13, and are alternately arranged with the positions of the plurality of material holes 201 on the lower receiving tray 21, that is, the upper ends of the two layers of material holes 201 and the heat exchange tubes 13 are alternately arranged, thereby also improving the evenness of material distribution.

[0055] To facilitate the cleaning of the interior of the evaporator main body 11, as Figure 3 shown, the evaporator main body 11 includes a cylinder body 111 and two covers 112. Among them, two plug plates 12 are respectively sealed and fixed at both ends of the cylinder body 111, and the steam pipe 14 is fixedly penetrated on the circumferential side of the cylinder body 111; the two covers 112 are detachably fixed at both ends of the cylinder body 111, and the intake pipe 15 and the feed pipe 16 are fixedly penetrated in the upper cover 112; when problems such as material caking occur, the interior of the evaporator can be cleaned and maintained by opening the cover 112.

[0056] The fixator 24 is used to facilitate the fixing and installation of the material distributor 2. The fixator 24 is detachably fixed on the upper plug plate 12 and is detachably fixedly connected to the two receiving trays 21.

[0057] As Figure 2As shown in the figure, the fixer 24 includes a sleeve 241, a first screw 242, a first abutting rod 243, a second abutting rod 244, a second screw 245 and a nut 246. Among them, the sleeve 241 is fixedly arranged between two material receiving trays 21; the first screw 242 is threadedly connected to the upper baffle 12; the first abutting rod 243 is fixedly arranged on the first screw 242 and abuts against the bottom side of the lower material receiving tray 21; the second abutting rod 244 is fixedly arranged on the first abutting rod 243, penetrates through the lower material receiving tray 21 and abuts against the bottom side of the upper material receiving tray 21. The second abutting rod 244 is located inside the sleeve 241; the second screw 245 is fixedly arranged on the second abutting rod 244 and penetrates through the upper material receiving tray 21; the nut 246 is threadedly connected to the second screw 245 and abuts against the top side of the upper material receiving tray 21. That is, the lower end of the fixer 24 can be connected and fixed to the baffle 12 by rotating the fixer 24, and each part of the fixer 24 abuts against a component, which can improve the stability of the entire fixer 24. At the same time, the sleeve 241 connects the two material receiving trays 21, which can facilitate the installation of the two material receiving trays 21. And the second abutting rod 244 is located inside the sleeve 241, which can isolate and protect it to prevent materials from falling down along its fixed position, so as to avoid affecting the uniform distribution of materials. Because of this design, the outer diameters of the second abutting rod 244 and the second screw 245 can be set relatively smaller to facilitate insertion into the corresponding installation holes.

[0058] As Figure 3 shown in the figure, the steam pipe 14 includes a steam inlet pipe 141 and a steam outlet pipe 142. One is used to input steam into the evaporator main body 11, and the other is used to output the steam in the evaporator main body 11, so as to form a circulating supply of steam. The steam inlet pipe 141 and the steam outlet pipe 142 are fixedly arranged on the periphery of the evaporator main body 11 in a vertically arranged manner; preferably, the outer diameter of the position on the evaporator main body 11 where the steam inlet pipe 141 is arranged is larger than the outer diameter of the position where the steam inlet pipe 141 is not arranged, so as to realize the rapid entry of steam and the compression of steam.

[0059] As Figure 3 shown in the figure, the tube box 1 further includes a discharge pipe 17, an evaporation product discharge pipe 18, a liquid level control pipe 19 and an exhaust pipe 10. Among them, the discharge pipe 17 is fixedly arranged at the bottom side of the evaporator main body 11 and is communicated with it. The concentrated material can be discharged to the outside of the evaporator along the discharge pipe 17.

[0060] The evaporation product discharge pipe 18 is hermetically fixed on the periphery of the evaporator main body 11 and is communicated with its interior. Substances such as water vapor evaporated from the material can be discharged along the evaporation product discharge pipe 18.

[0061] The liquid level control pipes 19 are hermetically fixed on the peripheral side of the evaporator body 11 and are in communication with its interior. Two liquid level control pipes 19 are arranged in a vertical row. By installing liquid level sensors inside them, it can prompt the operator whether the liquid level height of the concentrated material in the tube box 1 exceeds the highest standard or is lower than the lowest standard, so as to take corresponding measures in time.

[0062] The exhaust pipes 10 are all hermetically fixed on the peripheral side of the evaporator body 11 and are in communication with its interior to cooperate with the intake pipe 15 for the maintenance, repair or airtight test of the device.

[0063] The usage method of a stripping falling film evaporator applied to protein production of the present utility model is as follows:

[0064] First, connect the steam circulation equipment to the steam inlet pipe 141 and the steam outlet pipe 142 respectively to make the steam circulate and supply heat between the two baffles 12. Then connect the discharge pipe 17, the evaporate discharge pipe 18 and the exhaust pipe 10 to the corresponding equipment respectively. Hermetically fix the liquid level sensors in the liquid level control pipes 19. Then add the material through the feed pipe 16. After the material is evenly distributed by the material distributor 2 first, it evenly flows into a plurality of heat exchange pipes 13, so as to exchange heat with the steam to achieve the concentration effect on it. The concentrated material is discharged and collected through the discharge pipe 17, and the steam and the circulating gas are discharged through the evaporate discharge pipe 18 for heating other equipment, etc. During the operation of the device, the circulating gas can push the material to fall and heat the central position of the material, thereby improving the processing efficiency of this evaporator.

[0065] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A stripping falling film evaporator used in protein production, characterized in that: The invention comprises a pipe box (1) and a material distributor (2), wherein the pipe box (1) comprises an evaporator body (11), two blocking plates (12), a plurality of heat exchange tubes (13), a steam tube (14), an air inlet tube (15) and a feed tube (16), wherein: The two blocking plates (12) are sealed and fixed in the evaporator body (11) and are arranged at intervals; The heat exchange tube (13) is fixed between the two blocking plates (12) and is sealed therewith; The steam pipe (14) and the air inlet pipe (15) are both sealed and fixed on the peripheral side of the evaporator body (11) and are connected to the interior thereof; the steam pipe (14) is located between the two blocking plates (12), and the air inlet pipe (15) is located above the two blocking plates (12); The feed pipe (16) is sealed and fixed on the top side of the evaporator body (11) and is connected to the interior thereof; The material distributor (2) is arranged in the evaporator body (11) and is located between the heat exchange tube (13) and the feed tube (16), and is used to evenly distribute the material entering the evaporator body (11) through the feed tube (16) into each of the heat exchange tubes (13).

2. A stripping falling film evaporator for protein production according to claim 1, characterized in that: The material distributor (2) comprises a material receiving tray (21), the material receiving tray (21) being fixedly arranged in the evaporator body (11) and located between the heat exchange tube (13) and the feed tube (16), and a plurality of material holes (201) being provided in the material receiving tray.

3. A stripping falling film evaporator for protein production as claimed in claim 2, characterized in that: The feed pipe (16) passes through the evaporator body (11); The material distributor (2) comprises an anti-collision plate (22), which is fixedly arranged on one end of the feed pipe (16) located inside the evaporator body (11) and is spaced therefrom, and the anti-collision plate (22) is perpendicular to the axis of the feed pipe (16).

4. A stripping falling film evaporator for protein production as claimed in claim 3, characterized in that: The material distributor (2) further comprises a baffle (23), wherein the baffle (23) is fixedly arranged on the top side of the material receiving tray (21), and the plurality of material holes (201) are located in the baffle (23).

5. A stripping falling film evaporator for protein production as claimed in claim 4, characterized in that: The receiving tray (21) and the enclosure (23) are both arranged vertically, and two of them correspond to each other one by one; The anti-collision plate (22) is located in the upper enclosure (23), and the axis of the air intake pipe (15) intersects with the lower enclosure (23).

6. A stripping falling film evaporator for protein production as claimed in claim 5, characterized in that: The positions of the plurality of material holes (201) on the upper material receiving tray (21) correspond one-to-one to the positions of the upper ends of the heat exchange tubes (13), and are arranged alternately with the positions of the plurality of material holes (201) on the lower material receiving tray (21).

7. A stripping falling film evaporator for protein production according to claim 5, characterized in that: The evaporator body (11) comprises a cylinder (111) and two sealing covers (112), wherein: The two blocking plates (12) are respectively sealed and fixed at the two ends of the cylinder (111), and the steam pipe (14) penetrates and is fixed on the peripheral side of the cylinder (111); The two sealing covers (112) are detachably fixed at the two ends of the cylinder (111), and the air inlet pipe (15) and the feed pipe (16) are passed through and fixed in the sealing cover (112) located above; The material distributor (2) further comprises a fixer (24), wherein the fixer (24) is detachably fixed to the blocking plate (12) located above and is detachably fixedly connected to the two material receiving trays (21).

8. A stripping falling film evaporator for protein production according to claim 7, characterized in that: The fixer (24) comprises a sleeve (241), a first screw rod (242), a first abutting rod (243), a second abutting rod (244), a second screw rod (245) and a nut (246), wherein: The sleeve (241) is fixedly arranged between the two receiving trays (21); The first screw rod (242) is connected to the blocking plate (12) located above by threaded engagement; The first abutting rod (243) is fixedly arranged on the first screw rod (242) and abuts against the bottom side of the receiving tray (21) located below; The second abutting rod (244) is fixedly arranged on the first abutting rod (243), passes through the material receiving tray (21) located below, and abuts against the bottom side of the material receiving tray (21) located above, and the second abutting rod (244) is located in the sleeve (241); The second screw rod (245) is fixedly arranged on the second supporting rod (244) and penetrates the material receiving tray (21) located above; The nut (246) is connected to the second screw rod (245) by threaded engagement, and abuts against the top side of the receiving tray (21) located above.

9. The stripping falling film evaporator used for protein production according to claim 1, characterized in that: The steam pipe (14) comprises a steam inlet pipe (141) and a steam outlet pipe (142), and the steam inlet pipe (141) and the steam outlet pipe (142) are fixedly arranged on the peripheral side of the evaporator body (11) in a vertically arranged manner; The outer diameter of the position on the evaporator body (11) where the steam inlet pipe (141) is arranged is greater than the outer diameter of the position where the steam inlet pipe (141) is not arranged.

10. A stripping falling film evaporator for protein production according to claim 9, characterized in that: The pipe box (1) further comprises a discharge pipe (17), an evaporation discharge pipe (18), a liquid level control pipe (19) and an exhaust pipe (10), wherein: The discharge pipe (17) is fixedly arranged on the bottom side of the evaporator body (11) and is connected to the evaporator body (11). The evaporation discharge pipe (18), the liquid level control pipe (19) and the exhaust pipe (10) are all sealed and fixed on the peripheral side of the evaporator body (11) and are connected to the interior thereof.

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