Falling film evaporator liquid distributor and use method thereof

Abstract

The invention relates to the technical field of liquid distributors, and discloses a falling film evaporator liquid distributor and a use method thereof.The falling film evaporator liquid distributor comprises a distribution assembly, a fixing assembly and a driving assembly, the driving assembly is located in the distribution assembly, and the fixing assembly is located at the top of the distribution assembly; after an external water source is input into the water conveying pipe through the water pump, water flow pushes the propeller disc to rotate through self impact force, at the moment, the propeller disc drives the rotating propeller disc to rotate through the rotating shaft, and in the water discharging process of the distribution pipe, the rotating rotating propeller disc breaks and scatters continuous water flow discharged by the distribution pipe; therefore, the contact sufficiency of water and a cloth film in the falling film pipe is improved, and the heat transfer effect of the falling film evaporator is further improved; and through mutual cooperation of the first sealing ring and the sealing gasket, the contact part of the fixing bolt and a threaded hole in the falling film evaporator can be effectively prevented from being in contact with water and rusting, so that the later disassembly and maintenance convenience of the device is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid distributors, and in particular relates to a falling film evaporator liquid distributor and a use method thereof. Background Art

[0002] Falling film evaporator is a typical evaporation equipment. Its advantages are high heat transfer coefficient and short material heating time. It is suitable for processing heat-sensitive materials. It is an efficient and energy-saving equipment and is widely used in chemical, light and food processing industries. The working performance of the falling film evaporator depends on the distribution of the liquid film in the falling film tube by the liquid distributor. Therefore, whether the distributor design is reasonable directly affects the heat transfer effect, heat exchange efficiency and operation stability of the falling film evaporator.

[0003] At present, common liquid distributors can be roughly divided into overflow type, trough plate type, tube type, spray type, etc. The main problem is that the downstream position of the liquid caused by the spraying and showering method is fixed, which leads to the fixed contact point between the liquid and the film in the falling film tube, which makes it difficult for the film in the falling film tube to fully contact with the liquid, affecting the film effect in the falling film tube, thereby reducing the heat transfer effect. For this reason, we propose a falling film evaporator liquid distributor and a method of using the same. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a falling film evaporator liquid distributor and a method of using the same, which effectively solves the problem that the downstream position of the liquid distributed by the common liquid distributor is fixed, resulting in the contact point between the liquid and the film in the falling film tube being fixed, which makes it difficult for the film in the falling film tube to fully contact with the liquid, affecting the film effect in the falling film tube, thereby reducing the heat transfer effect.

[0005] To achieve the above object, the present invention provides the following technical solution: a falling film evaporator liquid distributor, comprising a distribution component, a fixing component, and a driving component, characterized in that: the driving component is located inside the distribution component, and the fixing component is located on the top of the distribution component;

[0006] The distribution component comprises a connecting pipe, the top of the connecting pipe is connected with a water pipe, the left side of the water pipe is connected with a flange, and the bottom of the connecting pipe is evenly connected with a distribution pipe.

[0007] Preferably, the fixing assembly includes a support frame, a group of connecting seats are provided on the left and right sides of the support frame, a group of sealing gaskets are provided on the opposite sides of the two groups of connecting seats, first countersunk holes are evenly penetrated on the opposite sides of the two groups of connecting seats, a first sealing ring is provided on the inner wall of the first countersunk hole, and a first through hole is evenly penetrated on the outer wall of the sealing gasket, and the first through hole corresponds to the first countersunk hole.

[0008] Preferably, the driving assembly includes a propeller disk and a base plate, a propeller disk is arranged at the bottom of the propeller disk, a rotating shaft is arranged at the bottom of the propeller disk, a rotating propeller disk is arranged at the bottom of the rotating shaft, a mounting column is arranged at the top of the base plate, a mounting cavity is arranged inside the mounting column, a bearing is arranged in the mounting cavity, a first groove is arranged at the top of the mounting column, a second through hole is arranged through the bottom of the mounting column and the base plate, the second through hole and the first groove are both connected with the mounting cavity, the rotating shaft is fixedly arranged on the inner ring of the bearing, the outer side wall of the rotating shaft is sleeved with a second sealing ring, the second sealing ring is fixedly arranged in the first groove, the rotating shaft is rotatably arranged in the first groove, the mounting cavity and the second through hole, and the outer side wall of the mounting column is sleeved with a second sealing ring.

[0009] Preferably, the two groups of support frames are evenly arranged on the top of the distribution pipe, the propeller disk is rotatably arranged in the water pipe, and the rotating shaft is rotatably arranged in the water pipe and the connecting pipe.

[0010] Preferably, a second groove is provided at the bottom of the connecting pipe, a mounting groove is provided through the top of the second groove, the bottom plate is located in the second groove, the mounting column is located in the mounting groove, and the second sealing ring is fixedly arranged in the mounting groove.

[0011] Preferably, second countersunk holes are uniformly opened through the bottom of the base plate, and threaded holes are uniformly opened in the second groove at the bottom of the connecting pipe, and the second countersunk holes correspond to the threaded holes.

[0012] Preferably, a bolt is provided in the second countersunk hole of the base plate, and the bolt is threadedly connected to the threaded hole of the connecting pipe.

[0013] Preferably, an annular groove is provided on the inner side wall of the second countersunk hole of the base plate, a sealing plug is inserted in the second countersunk hole, a retaining ring is provided on the outer side wall of the sealing plug, the sealing plug is located at the bottom of the bolt, and the retaining ring is clamped in the annular groove.

[0014] Preferably, the rotating propeller disk is located below the distribution pipe and corresponds to the water outlet of the distribution pipe, and the diameter of the mounting groove at the bottom of the connecting pipe is 1.2 times the diameter of the propeller disk.

[0015] A method for using a falling film evaporator liquid distributor:

[0016] Step 1: Place the device in the falling film evaporator, use the fixing bolts to penetrate the first countersunk hole of the connecting seat and the first through hole of the sealing gasket and screw them with the threaded hole in the falling film evaporator to complete the installation of the device. At this time, the sealing gasket fits tightly with the inner wall of the falling film evaporator. The first sealing ring and the sealing gasket cooperate with each other to effectively prevent the fixing bolts from contacting with the threaded hole in the falling film evaporator and rusting due to contact with water, thereby ensuring that the device can be disassembled and repaired more easily in the later stage, and then connect the flange to the external water pump.

[0017] Step 2: Fix the base plate in the second groove at the bottom of the connecting pipe by bolts, so that the mounting column is stabilized in the mounting groove at the bottom of the connecting pipe. The sealing plug is clamped in the second countersunk hole at the bottom of the base plate by a snap ring. The bolts are sealed and protected by the sealing plug to prevent them from rusting due to contact with water. The bearing assists the rotating shaft to rotate. The second sealing ring is used to seal the connection gap between the rotating shaft and the mounting column to prevent the bearing from rusting due to contact with water. The second sealing ring is used to seal the connection gap between the mounting column and the connecting pipe. The cooperation between the second sealing ring and the second sealing ring can effectively prevent the connecting pipe from leaking, thereby ensuring the reliability of the device.

[0018] Step 3: When the external water source is input into the water pipe through the water pump, the water flow drives the propeller disc to rotate by its own impact force. At this time, the propeller disc drives the rotating paddle disc to rotate through the rotating shaft, and the water entering the water pipe will be input into the distribution pipe along the connecting pipe and discharged through the distribution pipe. During the drainage process of the distribution pipe, the rotating paddle disc will interrupt and disperse the continuous water flow discharged from the distribution pipe, thereby improving the contact between water and the cloth film in the falling film tube, thereby improving the heat transfer effect of the falling film evaporator.

[0019] Step 4: After prying off the sealing plug, you can use a screwdriver to unscrew the bolt. At this time, you can move the base plate connecting the mounting column downward and remove it. Since the diameter of the mounting groove at the bottom of the connecting pipe is larger than the diameter of the propeller disc, when the base plate and the mounting column are moved downward for disassembly, the propeller disc can be driven by the rotating shaft to move and disassemble synchronously, thereby improving the maintenance convenience of the device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When the device is fixedly installed in the falling film evaporator by fixing bolts, the first sealing ring and the sealing gasket cooperate with each other to effectively prevent the fixing bolts from contacting with the threaded holes in the falling film evaporator and rusting due to contact with water, so as to ensure that the device can be disassembled and repaired relatively easily in the later stage;

[0022] 2. When the external water source is input into the water pipe through the water pump, the water flow drives the propeller disc to rotate by its own impact force. At this time, the propeller disc drives the rotating paddle disc to rotate through the rotating shaft. During the drainage process of the distribution pipe, the rotating paddle disc will interrupt and disperse the continuous water flow discharged from the distribution pipe, thereby improving the contact between water and the film in the falling film tube, thereby improving the heat transfer effect of the falling film evaporator;

[0023] 3. After removing the sealing plug and the bolt, the base plate connecting the mounting column can be moved downward and removed. Since the diameter of the mounting groove at the bottom of the connecting pipe is larger than the diameter of the propeller disc, when the base plate and the mounting column are moved downward for removal, the propeller disc can be driven by the rotating shaft to be moved and removed synchronously, thereby improving the maintenance convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] In the attached picture:

[0026] Figure 1 It is a structural schematic diagram of a liquid distributor of a falling film evaporator of the present invention;

[0027] Figure 2 A bottom view of a liquid distributor of a falling film evaporator according to the present invention;

[0028] Figure 3 A falling film evaporator liquid distributor according to the present invention Figure 2 A magnified view of part A;

[0029] Figure 4 It is a front cross-sectional view of a liquid distributor of a falling film evaporator according to the present invention;

[0030] Figure 5 A falling film evaporator liquid distributor according to the present invention Figure 4 A magnified view of part B;

[0031] Figure 6 A falling film evaporator liquid distributor according to the present invention Figure 5 Enlarged view of part C;

[0032] Figure 7 The figure is a top partial cross-sectional view of a liquid distributor of a falling film evaporator according to the present invention.

[0033] In the figure: 100, distribution component; 200, fixing component; 300, driving component; 1, connecting pipe; 11, distribution pipe; 12, water pipe; 13, flange; 2, support frame; 21, connecting seat; 22, sealing gasket; 23, first sealing ring; 3, propeller disc; 31, rotating shaft; 32, rotating propeller disc; 33, bottom plate; 34, mounting column; 35, second sealing ring; 36, bearing; 37, second sealing ring; 4, bolt; 41, sealing plug; 42, retaining ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 7 As shown, the present invention provides a technical solution: a falling film evaporator liquid distributor, comprising a distribution component 100, a fixing component 200, and a driving component 300, wherein the driving component 300 is located inside the distribution component 100, and the fixing component 200 is located on the top of the distribution component 100;

[0036] The distribution component 100 includes a connecting pipe 1 , the top of the connecting pipe 1 is connected to a water pipe 12 , the left side of the water pipe 12 is connected to a flange 13 , and the bottom of the connecting pipe 1 is evenly connected to a distribution pipe 11 .

[0037] The fixing assembly 200 includes a support frame 2, a group of connecting seats 21 are fixedly provided on the left and right sides of the support frame 2, a group of sealing gaskets 22 are fixedly provided on the opposite sides of the two groups of connecting seats 21, and first countersunk holes are evenly penetrated on the opposite sides of the two groups of connecting seats 21, and a first sealing ring 23 is fixedly provided on the inner wall of the first countersunk hole, and a first through hole is evenly penetrated on the outer wall of the sealing gasket 22, and the first through hole corresponds to the first countersunk hole. The device is placed in the falling film evaporator, and the fixing bolts are used to penetrate the first countersunk hole of the connecting seat 21 and the first through hole of the sealing gasket 22 and are screwed with the threaded hole in the falling film evaporator to complete the installation of the device. The first sealing ring 23 and the sealing gasket 22 cooperate with each other to effectively prevent the fixing bolts from contacting the threaded hole in the falling film evaporator and rusting due to contact with water, thereby ensuring that the device can be disassembled and repaired more easily in the later stage, and then the flange 13 is connected to the external water pump.

[0038] The driving assembly 300 includes a propeller disk 3 and a base plate 33, wherein the propeller disk 3 is fixedly provided at the bottom of the propeller disk 3, a rotating shaft 31 is fixedly provided at the bottom of the propeller disk 3, a rotating propeller disk 32 is fixedly provided at the bottom of the rotating shaft 31, a mounting column 34 is fixedly provided at the top of the base plate 33, a mounting cavity is provided inside the mounting column 34, a bearing 36 is fixedly provided in the mounting cavity, a first groove is provided at the top of the mounting column 34, a second through hole is provided through the bottom of the mounting column 34 and the base plate 33, the second through hole and the first groove are both connected with the mounting cavity, the rotating shaft 31 is fixedly provided on the inner ring of the bearing 36, a second sealing ring 37 is sleeved on the outer wall of the rotating shaft 31, the second sealing ring 37 is fixedly provided in the first groove, the rotating shaft 31 is rotatably provided in the first groove, the mounting cavity and the second through hole, and a second sealing ring 35 is sleeved on the outer wall of the mounting column 34.

[0039] Two groups of support frames 2 are evenly fixed on the top of the distribution pipe 11, the propeller disc 3 is rotatably set in the water pipe 12, the rotating shaft 31 is rotatably set in the water pipe 12 and the connecting pipe 1, and the rotating shaft 31 is assisted by the bearing 36 to rotate, and the connecting gap between the rotating shaft 31 and the mounting column 34 is sealed by the second sealing ring 37 to prevent the bearing 36 from rusting when in contact with water.

[0040] A second groove is provided at the bottom of the connecting pipe 1, and a mounting groove is provided through the top of the second groove. The bottom plate 33 is located in the second groove, the mounting column 34 is located in the mounting groove, and the second sealing ring 35 is fixedly arranged in the mounting groove. The connecting gap between the mounting column 34 and the connecting pipe 1 is sealed by the second sealing ring 35. The mutual cooperation between the second sealing ring 35 and the second sealing ring 37 can effectively prevent the connecting pipe 1 from leaking, thereby ensuring the reliability of the device.

[0041] The bottom of the bottom plate 33 is evenly penetrated with second countersunk holes, and the second groove at the bottom of the connecting pipe 1 is evenly provided with threaded holes, and the second countersunk holes correspond to the threaded holes. A bolt 4 is rotatably arranged in the second countersunk hole of the bottom plate 33, and the bolt 4 is threadedly connected to the threaded hole of the connecting pipe 1. An annular groove is arranged on the inner wall of the second countersunk hole of the bottom plate 33, and a sealing plug 41 is inserted in the second countersunk hole. A retaining ring 42 is fixedly arranged on the outer wall of the sealing plug 41. The sealing plug 41 is located at the bottom of the bolt 4, and the retaining ring 42 is clamped in the annular groove. The rotating propeller disk 32 is located below the distribution pipe 11, and the sealing plug 41 is clamped in the second countersunk hole at the bottom of the bottom plate 33 through the retaining ring 42. The bolt 4 is sealed and protected by the sealing plug 41 to prevent it from rusting when in contact with water. Corresponding to the water outlet of the distribution pipe 11, the diameter of the mounting groove at the bottom of the connecting pipe 1 is 1.2 times the diameter of the propeller disk 3.

[0042] A method for using a falling film evaporator liquid distributor:

[0043] Step 1: Place the device in the falling film evaporator, use the fixing bolts to penetrate the first countersunk hole of the connecting seat 21 and the first through hole of the sealing gasket 22 and screw them with the threaded hole in the falling film evaporator to complete the installation of the device. At this time, the sealing gasket 22 fits tightly with the inner wall of the falling film evaporator. The first sealing ring 23 and the sealing gasket 22 cooperate with each other to effectively prevent the fixing bolts from contacting with the threaded hole in the falling film evaporator and rusting due to contact with water, thereby ensuring that the device can be disassembled and repaired more easily in the later stage, and then connect the flange 13 to the external water pump.

[0044] Step 2: Fix the bottom plate 33 in the second groove at the bottom of the connecting pipe 1 by means of the bolt 4, so that the mounting column 34 is stabilized in the mounting groove at the bottom of the connecting pipe 1, and the sealing plug 41 is clamped in the second countersunk hole at the bottom of the bottom plate 33 by the retaining ring 42, and the bolt 4 is sealed and protected by the sealing plug 41 to prevent it from rusting when in contact with water, and the rotating shaft 31 is assisted to rotate by the bearing 36, and the connecting gap between the rotating shaft 31 and the mounting column 34 is sealed by the second sealing ring 37 to prevent the bearing 36 from rusting when in contact with water, and the connecting gap between the mounting column 34 and the connecting pipe 1 is sealed by the second sealing ring 35, so that the cooperation between the second sealing ring 35 and the second sealing ring 37 can effectively prevent the connecting pipe 1 from leaking, thereby ensuring the reliability of the device.

[0045] Step three: When the external water source is input into the water pipe 12 through the water pump, the water flow drives the propeller disk 3 to rotate by its own impact force. At this time, the propeller disk 3 drives the rotating paddle disk 32 to rotate through the rotating shaft 31, and the water entering the water pipe 12 will be input into the distribution pipe 11 along the connecting pipe 1 and discharged through the distribution pipe 11. During the drainage process of the distribution pipe 11, the rotating rotating paddle disk 32 will interrupt and disperse the continuous water flow discharged from the distribution pipe 11, so as to improve the contact between the water and the cloth film in the falling film tube, thereby improving the heat transfer effect of the falling film evaporator.

[0046] Step 4: After prying off the sealing plug 41, you can use a screwdriver to unscrew the bolt 4. At this time, the bottom plate 33 connected to the mounting column 34 can be moved downward and removed. Since the diameter of the mounting groove at the bottom of the connecting pipe 1 is larger than the diameter of the propeller disc 3, when the bottom plate 33 and the mounting column 34 are moved downward for disassembly, the propeller disc 3 can be driven by the rotating shaft 31 to be moved and disassembled synchronously, thereby improving the maintenance convenience of the device.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A falling film evaporator liquid distributor, comprising a distribution component (100), a fixing component (200), and a driving component (300), characterized in that: The driving component (300) is located inside the distribution component (100), and the fixing component (200) is located on the top of the distribution component (100); The distribution component (100) comprises a connecting pipe (1), the top of the connecting pipe (1) is connected to a water pipe (12), the left side of the water pipe (12) is connected to a flange (13), and the bottom of the connecting pipe (1) is evenly connected to a distribution pipe (11).

2. The falling film evaporator liquid distributor according to claim 1, characterized in that: The fixing assembly (200) comprises a support frame (2), a group of connecting seats (21) are arranged on both left and right sides of the support frame (2), a group of sealing gaskets (22) are arranged on opposite sides of the two groups of connecting seats (21), first countersunk holes are uniformly penetrated on opposite sides of the two groups of connecting seats (21), a first sealing ring (23) is arranged on the inner side wall of the first countersunk hole, and a first through hole is uniformly penetrated on the outer side wall of the sealing gasket (22), and the first through hole corresponds to the first countersunk hole.

3. A falling film evaporator liquid distributor according to claim 2, characterized in that: The driving assembly (300) comprises a propeller disc (3) and a bottom plate (33), wherein the propeller disc (3) is provided at the bottom of the propeller disc (3), a rotating shaft (31) is provided at the bottom of the propeller disc (3), a rotating propeller disc (32) is provided at the bottom of the rotating shaft (31), a mounting column (34) is provided at the top of the bottom plate (33), a mounting cavity is provided inside the mounting column (34), a bearing (36) is provided in the mounting cavity, and a first groove is provided at the top of the mounting column (34). The bottom of the mounting column (34) and the bottom plate (33) are both penetrated by a second through hole, the second through hole and the first groove are both connected to the mounting cavity, the rotating shaft (31) is fixedly arranged on the inner ring of the bearing (36), the outer wall of the rotating shaft (31) is sleeved with a second sealing ring (37), the second sealing ring (37) is fixedly arranged in the first groove, the rotating shaft (31) is rotatably arranged in the first groove, the mounting cavity and the second through hole, and the outer wall of the mounting column (34) is sleeved with a second sealing ring (35).

4. A falling film evaporator liquid distributor according to claim 3, characterized in that: The two groups of support frames (2) are evenly arranged on the top of the distribution pipe (11), the propeller disc (3) is rotatably arranged in the water pipe (12), and the rotating shaft (31) is rotatably arranged in the water pipe (12) and the connecting pipe (1).

5. The falling film evaporator liquid distributor according to claim 4, characterized in that: The bottom of the connecting pipe (1) is provided with a second groove, the top of the second groove is provided with a mounting groove, the bottom plate (33) is located in the second groove, the mounting column (34) is located in the mounting groove, and the second sealing ring (35) is fixedly arranged in the mounting groove.

6. The falling film evaporator liquid distributor according to claim 5, characterized in that: The bottom of the bottom plate (33) is evenly penetrated with second countersunk holes, and the second groove at the bottom of the connecting pipe (1) is evenly provided with threaded holes, and the second countersunk holes correspond to the threaded holes.

7. A falling film evaporator liquid distributor according to claim 6, characterized in that: A bolt (4) is arranged in the second countersunk hole of the bottom plate (33), and the bolt (4) is threadedly connected to the threaded hole of the connecting pipe (1).

8. The falling film evaporator liquid distributor according to claim 7, characterized in that: An annular groove is formed on the inner side wall of the second countersunk hole of the bottom plate (33); a sealing plug (41) is inserted into the second countersunk hole; a retaining ring (42) is provided on the outer side wall of the sealing plug (41); the sealing plug (41) is located at the bottom of the bolt (4); and the retaining ring (42) is retained in the annular groove.

9. The falling film evaporator liquid distributor according to claim 8, characterized in that: The rotating propeller disc (32) is located below the distribution pipe (11) and corresponds to the water outlet of the distribution pipe (11). The diameter of the mounting groove at the bottom of the connecting pipe (1) is 1.2 times the diameter of the propeller disc (3).

10. The method for using a falling film evaporator liquid distributor according to any one of claims 1 to 9, characterized in that: The following steps are included. Step 1: Place the device in the falling film evaporator, use a fixing bolt to penetrate the first countersunk hole of the connecting seat (21) and the first through hole of the sealing gasket (22) and screw it with the threaded hole in the falling film evaporator to complete the installation of the device. At this time, the sealing gasket (22) is tightly fitted with the inner wall of the falling film evaporator. The first sealing ring (23) and the sealing gasket (22) cooperate with each other to effectively prevent the fixing bolt from contacting with the threaded hole in the falling film evaporator and rusting due to contact with water, thereby ensuring that the device can be disassembled and repaired more easily in the later stage, and then connect the flange (13) to the external water pump. Step 2: The bottom plate (33) is fixed to the second groove at the bottom of the connecting pipe (1) by means of bolts (4), so that the mounting column (34) is stabilized in the mounting groove at the bottom of the connecting pipe (1); the sealing plug (41) is clamped in the second countersunk hole at the bottom of the bottom plate (33) by means of a clamping ring (42); the bolt (4) is sealed and protected by the sealing plug (41) to prevent it from rusting due to contact with water; the rotating shaft (31) is assisted to rotate by means of the bearing (36); the connecting gap between the rotating shaft (31) and the mounting column (34) is sealed by means of the second sealing ring (37) to prevent the bearing (36) from rusting due to contact with water; the connecting gap between the mounting column (34) and the connecting pipe (1) is sealed by means of the second sealing ring (35); and the second sealing ring (35) and the second sealing ring (37) cooperate with each other to effectively prevent the connecting pipe (1) from leaking, thereby ensuring the reliability of the device. Step 3: When the external water source is input into the water pipe (12) through the water pump, the water flow pushes the propeller disc (3) to rotate by its own impact force. At this time, the propeller disc (3) drives the rotating paddle disc (32) to rotate through the rotating shaft (31), and the water entering the water pipe (12) will be input into the distribution pipe (11) along the connecting pipe (1) and discharged through the distribution pipe (11). During the drainage process of the distribution pipe (11), the rotating rotating paddle disc (32) will interrupt and disperse the continuous water flow discharged from the distribution pipe (11), thereby improving the contact between the water and the cloth film in the falling film tube, thereby improving the heat transfer effect of the falling film evaporator. Step 4: After the sealing plug (41) is pried off, the bolt (4) can be unscrewed using a screwdriver. At this time, the bottom plate (33) connected to the mounting column (34) can be moved downward for removal. Since the diameter of the mounting groove at the bottom of the connecting pipe (1) is larger than the diameter of the propeller disc (3), when the bottom plate (33) and the mounting column (34) are moved downward for removal, the propeller disc (3) can be driven by the rotating shaft (31) to be moved and removed synchronously, thereby improving the convenience of maintenance of the device.

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