Efficient reboiler and rectifying tower

Abstract

The invention relates to an efficient reboiler and a rectifying tower, and belongs to the technical field of reboilers. Comprising a shell and a U-shaped heat exchange tube arranged in the shell, a shell pass inlet and a shell pass outlet are formed in the shell, a liquid inlet cavity and a liquid outlet cavity are formed in one end of the shell, and the two ends of the U-shaped heat exchange tube are communicated with the liquid inlet cavity and the liquid outlet cavity respectively. The shell is provided with a tube pass inlet and a tube pass outlet corresponding to the liquid inlet cavity and the liquid outlet cavity respectively, the U-shaped heat exchange tubes are sleeved with cleaning plates, the cleaning plates are provided with through holes corresponding to the U-shaped heat exchange tubes in a one-to-one mode, and cleaning pieces are arranged in the through holes. The shell is provided with a driving piece used for driving the cleaning plate to reciprocate in the length direction of the shell. According to the invention, the problem that the internal structure of the reboiler is difficult to clean in the prior art is solved.

Description

Technical Field

[0001] The invention relates to a high-efficiency reboiler and a distillation tower, belonging to the technical field of reboilers. Background Art

[0002] In my country's petroleum, chemical, rubber, plastic, chemical fiber, food and other production fields, the reboiler is one of the important equipment in the process system. It re-vaporizes the liquid phase material at the bottom of the distillation tower, thereby realizing the heat and mass transfer between the vapor and liquid phases in the distillation tower.

[0003] As the production operation time increases, scaling is easy to form, resulting in reduced heat exchange efficiency, increased fluid resistance, reduced production efficiency, increased production costs, and even safety hazards. Therefore, the cleaning of the reboiler has become an issue that cannot be ignored. Commonly used descaling methods include mechanical descaling such as high-pressure water guns, alkaline washing (boiling) descaling, acid washing descaling, etc. Descaling work is time-consuming and labor-intensive, and also causes economic losses to the factory. In addition, the scale in the reboiler heating tube is mostly carbonized coke scale, which is composed of complex chemical substances. It is difficult to pickle like calcium and magnesium scale, and it is also difficult to clean with a high-pressure water gun.

[0004] After searching, a Chinese patent with announcement number CN219091093U discloses an anti-scaling structure and a reboiler for producing 2-biphenylmethanol, the technical key points of which are: comprising: a shell; a drive assembly, arranged on the outside of a support away from the open end of the shell; a stirring mechanism, which is transmission-connected to the drive assembly and rotates through the closed end of the shell; a support, which is symmetrically arranged on the lower side of the shell. The utility model further improves the material stirring force and the complexity of liquid movement, increases the impact force and disorder of the material liquid, ensures uniform heat exchange of the liquid in each area, and can further significantly delay and reduce the occurrence of precipitation and scaling of the material in the reboiler.

[0005] The above solution delays the precipitation and scaling phenomenon, but after long-term use, dirt will still form on the outer wall of the heat exchange tube, which needs to be manually cleaned. However, due to the dense heat exchange tubes inside the shell, it is impossible to enter the interior for cleaning through the manhole. It is more difficult to clean with a high-pressure water gun, and there are many dead corners that are difficult to clean thoroughly.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a high-efficiency reboiler and a distillation tower, which solves the problem that the internal structure of the reboiler is difficult to clean in the prior art.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A high-efficiency reboiler and distillation tower, comprising a shell, a U-shaped heat exchange tube arranged in the shell, the shell being provided with a shell-side inlet and a shell-side outlet, one end of the shell being provided with a liquid inlet cavity and a liquid outlet cavity, two ends of the U-shaped heat exchange tube being respectively connected to the liquid inlet cavity and the liquid outlet cavity, the shell being provided with a tube-side inlet and a tube-side outlet corresponding to the liquid inlet cavity and the liquid outlet cavity, a cleaning plate being sleeved on the U-shaped heat exchange tube, the cleaning plate being provided with through holes corresponding to the U-shaped heat exchange tubes, the through holes being provided with cleaning parts, and the shell being provided with a driving part for driving the cleaning plate to reciprocate along the length direction of the shell.

[0009] The present invention is further configured as follows: the through hole is in the shape of a regular polygon and has a plurality of supporting surfaces, each of the supporting surfaces is provided with a cleaning member, the cleaning member comprises a roller brush rotatably supported on the supporting surface, the roller brush has a square cross-section, and two opposite corners have fillets whose centers coincide with the rotation axis of the roller brush, the two surfaces of the roller brush adjacent to one fillet are respectively a first cleaning surface and a second cleaning surface, the two surfaces of the roller brush adjacent to another fillet are respectively a first abutting surface and a second abutting surface, the first abutting surface is opposite to the first cleaning surface, the second abutting surface is opposite to the second cleaning surface, the first cleaning surface is provided with a silver wire cloth layer, and the second cleaning surface is configured as a flexible cleaning surface.

[0010] The present invention is further configured as follows: a sewage pipe is provided at the bottom of the shell, the cleaning plate is hollow, an annular water storage cavity is provided at the periphery of the through hole and inside the cleaning plate, a plurality of the annular water storage cavities are interconnected through a connecting pipe, and one of the annular water storage cavities is connected to a water inlet main extending to the outside of the shell, the roller brush comprises a roller body and a covering layer, the covering layer is made of a cleaning sponge material, and the silver wire cloth layer is attached to the outside of the covering layer to form a first cleaning surface; A closing piece is provided on the inner wall of the annular water storage chamber corresponding to each of the supporting surfaces, and the closing piece includes a sealing plate elastically hinged to the inner wall of the annular water outlet groove, and an abutment rod fixedly connected to the sealing plate, passing through the supporting surface and extending into the through hole, the abutment rod extends in an arc shape around the hinge axis of the sealing plate, and is slidably connected to the supporting surface of the through hole, a number of evenly distributed water outlet holes connected to the annular water storage chamber are provided on the supporting surface, a number of evenly distributed closing holes are provided on the sealing plate, and when the sealing plate rotates to abut against the inner wall of the annular water storage chamber, the several closing holes and the several water outlet holes are staggered.

[0011] The present invention is further configured as follows: elastic sealing rings are fixedly connected to both ends of the through hole, the inner wall of the elastic sealing ring is fitted to the U-shaped heat exchange tube, and the inner edge of the elastic sealing ring is provided with a folded edge folded toward the roller brush.

[0012] The present invention is further configured as follows: an annular cavity is provided inside the peripheral wall of the shell, and a thermal insulation plate is provided inside the annular cavity.

[0013] The present invention is further configured as follows: the driving member comprises a first sliding groove provided on the peripheral wall of the shell and extending along the length direction thereof, a second sliding groove provided on the insulation board and extending spirally around the axis thereof, a sliding member slidably connected to the first sliding groove and the second sliding groove, a protective shell fixedly connected to the outer wall of the shell and covering the first sliding groove, a driving block slidably connected to the protective shell and fixedly connected to the outer wall of the sliding member, a driving screw rotatably connected to the protective shell and threadedly connected to the driving block, a driving motor fixedly installed at one end of the protective shell and connected to the driving screw, an extension groove for the water inlet main pipe to extend out is provided on the top of the protective shell, and the cleaning plate is connected to the sliding member; The sliding member includes a first plate body and a second plate body which are respectively slidably connected to the first sliding groove and are respectively located at the inner and outer sides of the insulation board, and a third plate body which is fixedly connected between the first plate body and the second plate body and slidably connected to the second sliding groove.

[0014] The present invention is further configured as follows: a connecting piece is provided between the sliding member and the cleaning plate, the cleaning plate includes a first semicircular plate and a second semicircular plate, the connecting piece includes a support plate and a driving plate arranged on one side of the support plate, one end of the driving plate is fixedly connected to the sliding member, the cut edges of the first semicircular plate and the second semicircular plate are elastically hinged on the other side of the support plate, and when there is no external force, the first semicircular plate and the second semicircular plate are in an unfolded state, and the upper and lower sides of the driving plate are respectively fixedly connected with an upper push rod and a lower push rod slidably penetrated by the support plate, the ends of the upper push rod and the lower push rod are provided with rollers that respectively roll and abut against the first semicircular plate and the second semicircular plate, and a supporting spring is provided between the support plate and the driving plate.

[0015] A distillation tower comprises a tower body and a reboiler, wherein the tower body is connected to a shell side inlet of the reboiler through a first connecting pipe, and the tower body is connected to a shell side outlet of the reboiler through a second connecting pipe.

[0016] The beneficial effects of the present invention are: 1. By setting a cleaning plate and a driving member, in cooperation with the cleaning member set in the through hole, after the reboiler has been used for a long time, when the outer wall of the U-shaped heat exchange tube needs to be cleaned due to scaling, the driving motor is started, and the sliding member is driven by the driving motor to reciprocate along the axial direction of the shell, thereby driving the cleaning plate slidably sleeved on the U-shaped heat exchange tube to move, and the dirt on the outer wall of the U-shaped heat exchange tube is scraped off by the cleaning member, and the cleaning plate is moved to one end of the shell relative to the liquid inlet cavity and the liquid outlet cavity when not in use, so as to support the U-shaped heat exchange tube, reduce the occupation of the internal space of the shell, and do not affect the use of the heat exchanger; 2. During the reciprocating movement of the cleaning plate along the U-shaped heat exchange tube, the cleaning piece arranged in the through hole is attached to the outer wall of the U-shaped heat exchange tube. When the cleaning piece moves toward one end of the shell, the roller brush rotates 90° in the positive direction under the action of friction, so that the first cleaning surface of the roller brush is attached to the outer wall of the U-shaped heat exchange tube. Since the silver wire cloth layer is provided on the first cleaning surface, the dirt on the outer wall of the U-shaped heat exchange tube can be effectively wiped off. When the cleaning piece moves toward the other end of the shell, the roller brush rotates 90° in the opposite direction under the action of friction, so that the second cleaning surface of the roller brush is against the outer wall of the U-shaped heat exchange tube. Connected to the outer wall of the U-shaped heat exchange tube, since the second cleaning surface is a flexible cleaning surface, when the second cleaning surface abuts against the U-shaped heat exchange tube, the second abutting surface pushes the abutting rod to open the sealing plate. At this time, the staff inputs the cleaning liquid into the annular water storage cavity at the periphery of the through hole through the water inlet main pipe. The cleaning liquid in the annular water storage cavity flows out through the water outlet and the closed hole and penetrates into the coating layer of the roller brush. The outer wall of the U-shaped heat exchange tube is scrubbed with the cleaning liquid through the second cleaning surface to wipe off the dirt scraped off the outer wall of the U-shaped heat exchange tube, thereby improving the cleaning effect of the U-shaped heat exchange tube. 3. By arranging a heat-insulating plate in the shell, and respectively opening a first sliding groove on the shell and a second sliding groove on the heat-insulating plate, the sliding member can not only always ensure the sealing inside the shell during the sliding process, but also ensure the heat preservation of the reboiler under normal working conditions by arranging the interlayer, reduce the heat escape to the outside, and thus reduce energy waste; 4. By setting a connecting piece between the driving piece and the cleaning plate, with the cooperation of the support plate, the driving plate, the upper push rod and the lower push rod, when the driving piece pushes the cleaning plate to move to the bending part of the U-shaped heat exchange tube, the cleaning plate is restricted from moving by the U-shaped heat exchange tube. At this time, the driving plate overcomes the elastic force of the supporting spring between the driving plate and the support plate, and applies the force directly to the first semicircular plate and the second semicircular plate through the upper push rod and the lower push rod, so that the first semicircular plate and the second semicircular plate can be folded to clean the bending part of the U-shaped heat exchange tube, thereby ensuring the cleaning efficiency of the U-shaped heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the distillation tower in the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the reboiler in the present invention.

[0019] Figure 3 It is an overall cross-sectional view of the reboiler part of the present invention.

[0020] Figure 4 yes Figure 3 A partial enlarged view of part A.

[0021] Figure 5 yes Figure 4 A partial enlarged view of part B.

[0022] Figure 6 It is a cross-sectional view of the through hole portion of the cleaning plate in the present invention.

[0023] Figure 7 It is an overall cross-sectional view of the reboiler part of the present invention.

[0024] Figure 8 yes Figure 7 A partial enlarged view of part C In the figure: 1, shell; 2, U-shaped heat exchange tube; 3, shell side inlet; 4, shell side outlet; 5, liquid inlet cavity; 6, liquid outlet cavity; 7, tube side inlet; 8, tube side outlet; 9, sewage pipe; 10, annular cavity; 11, insulation plate; 12, cleaning plate; 13, through hole; 14, supporting surface; 15, cleaning member; 16, roller brush; 17, roller body; 18, coating layer; 19, fillet; 20, first cleaning surface; 21, second cleaning surface; 22, first abutting surface; 23, second abutting surface; 24, silver wire cloth layer; 25, annular water storage cavity; 26, connecting pipe; 27, water inlet main pipe; 28, closing member; 29, sealing plate; 30, abutting rod; 31. Water outlet hole; 32. Closing hole; 33. Elastic sealing ring; 34. Driving member; 35. First sliding groove; 36. Second sliding groove; 37. Sliding member; 38. Protective shell; 39. Driving block; 40. Driving screw rod; 41. Driving motor; 42. Extension groove; 43. First plate body; 44. Second plate body; 45. Third plate body; 46. First semicircular plate; 47. Second semicircular plate; 48. Connecting member; 49. Support plate; 50. Driving plate; 51. Upper push rod; 52. Lower push rod; 53. Roller; 54. Support spring; 55. Tower body; 56. First connecting pipe; 57. Second connecting pipe; 58. Reboiler. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0026] like Figure 1-Figure 8As shown, a distillation tower includes a tower body 55 and a reboiler 58 , wherein the tower body 55 is connected to the shell side inlet 3 of the reboiler 58 via a first connecting pipe 56 , and the tower body 55 is connected to the shell side outlet 4 of the reboiler 58 via a second connecting pipe 57 .

[0027] A high-efficiency reboiler comprises a shell 1, a U-shaped heat exchange tube 2 arranged in the shell 1, a shell side inlet 3 and a shell side outlet 4 are arranged on the top of the shell 1, a liquid inlet cavity 5 and a liquid outlet cavity 6 are arranged at one end of the shell 1, two ends of the U-shaped heat exchange tube 2 are respectively connected to the liquid inlet cavity 5 and the liquid outlet cavity 6, the shell 1 is respectively provided with a tube side inlet 7 and a tube side outlet 8 corresponding to the liquid inlet cavity 5 and the liquid outlet cavity 6, a sewage pipe 9 is arranged at the bottom of the shell 1, an annular cavity 10 is opened inside the peripheral wall of the shell 1, and a thermal insulation plate 11 is arranged in the annular cavity 10.

[0028] A cleaning plate 12 is sleeved on the U-shaped heat exchange tube 2. The cleaning plate 12 is provided with through holes 13 corresponding to the U-shaped heat exchange tube 2. The through holes 13 are regular polygonal and have multiple supporting surfaces 14. Cleaning pieces 15 are provided in the through holes 13, and each supporting surface 14 is provided with a cleaning piece 15.

[0029] Specifically, the cleaning member 15 includes a roller brush 16 rotatably supported on a supporting surface 14, the roller brush 16 includes a roller body 17 and a covering layer 18, the covering layer 18 is made of a cleaning sponge material, the roller brush 16 has a square cross-section, and two opposite corners have fillets 19 whose centers coincide with the rotation axis of the roller brush 16, the two surfaces of the roller brush 16 adjacent to one fillet 19 are respectively a first cleaning surface 20 and a second cleaning surface 21, the two surfaces of the roller brush 16 adjacent to the other fillet 19 are respectively a first abutting surface 22 and a second abutting surface 23, the first abutting surface 22 is opposite to the first cleaning surface 20, the second abutting surface 23 is opposite to the second cleaning surface 21, the first cleaning surface 20 is provided with a silver wire cloth layer 24, the silver wire cloth layer 24 is attached to the outer side of the covering layer 18 to constitute the first cleaning surface 20, the second cleaning surface 21 is set to be a flexible cleaning surface, and the flexible cleaning surface is a flexible cleaning surface constituted by a cleaning sponge material dog.

[0030] The cleaning plate 12 is hollow, and an annular water storage chamber 25 is provided inside the cleaning plate 12 on the periphery of the through hole 13. Several annular water storage chambers 25 are interconnected by connecting pipes 26, and one of the annular water storage chambers 25 is connected to a water inlet main pipe 27 extending to the outside of the shell 1. Since the cleaning sponge has a certain water absorption capacity, the cleaning liquid in the annular water storage chamber 25 can penetrate into the cleaning liquid and be rubbed onto the outer wall of the U-shaped heat exchange tube 2.

[0031] To facilitate the control of the cleaning liquid in the annular water storage chamber 25, a closing member 28 is provided on the inner wall of the annular water storage chamber 25 corresponding to each supporting surface 14. The closing member 28 includes a sealing plate 29 elastically hinged to the inner side wall of the annular water outlet groove, and an abutment rod 30 fixedly connected to the sealing plate 29 and passing through the supporting surface 14 and extending into the through hole 13. Specifically, a torsion spring (not shown in the figure) is provided at the hinge axis of the sealing plate 29. The abutment rod 30 extends in an arc shape around the hinge axis of the sealing plate 29 and is slidably connected to the supporting surface 14 of the through hole 13. A number of evenly distributed water outlet holes 31 connected to the annular water storage chamber 25 are provided on the supporting surface 14, and a number of evenly distributed closed holes 32 are provided on the sealing plate 29. When the sealing plate 29 rotates to abut against the inner wall of the annular water storage chamber 25, the several closed holes 32 and the several water outlet holes 31 are staggered.

[0032] During the reciprocating movement of the cleaning plate 12 along the U-shaped heat exchange tube 2, the cleaning member 15 arranged in the through hole 13 is attached to the outer wall of the U-shaped heat exchange tube 2. When the cleaning member 15 moves toward one end of the shell 1, the roller brush 16 rotates 90° in the positive direction under the action of friction, so that the first cleaning surface 20 of the roller brush 16 is attached to the outer wall of the U-shaped heat exchange tube 2. Since the silver wire cloth layer 24 is provided on the first cleaning surface 20, the dirt on the outer wall of the U-shaped heat exchange tube 2 can be effectively wiped off. When the cleaning member 15 moves toward the other end of the shell 1, the roller brush 16 rotates 90° in the opposite direction under the action of friction, so that the second cleaning surface 21 of the roller brush 16 abuts against The outer wall of the U-shaped heat exchange tube 2, since the second cleaning surface 21 is a flexible cleaning surface, when the second cleaning surface 21 abuts against the U-shaped heat exchange tube 2, the second abutting surface 23 pushes the abutting rod 30, so that the sealing plate 29 is opened. At this time, the staff inputs cleaning liquid into the annular water storage cavity 25 on the outer periphery of the through hole 13 through the water inlet main pipe 27. The cleaning liquid in the annular water storage cavity 25 flows out through the water outlet hole 31 and the closed hole 32, and penetrates into the coating layer 18 of the roller brush 16. The outer wall of the U-shaped heat exchange tube 2 is scrubbed with the cleaning liquid through the second cleaning surface 21, and the dirt scraped off the outer wall of the U-shaped heat exchange tube 2 is wiped off, thereby improving the cleaning effect of the U-shaped heat exchange tube 2.

[0033] In order to improve the sealing inside the through hole 13 and reduce the intrusion of liquid into the shell 1 under normal working conditions of the reboiler, elastic sealing rings 33 are fixedly connected at both ends of the through hole 13, and the inner wall of the elastic sealing ring 33 is attached to the U-shaped heat exchange tube 2. The inner edge of the elastic sealing ring 33 is provided with a folded edge folded toward the roller brush 16.

[0034] The housing 1 is provided with a driving member 34 for driving the cleaning plate 12 to reciprocate along the length direction of the housing 1. The driving member 34 includes a first sliding groove 35 opened on the peripheral wall of the housing 1 and extending along the length direction thereof, a second sliding groove 36 opened on the insulation plate 11 and extending in a spiral shape around its axis, a sliding member 37 slidably connected to the first sliding groove 35 and the second sliding groove 36, a protective shell 38 fixedly connected to the outer wall of the housing 1 and covered by the first sliding groove 35, a driving block 39 slidably connected to the protective shell 38 and fixedly connected to the outer wall of the sliding member 37, and a rotating member 39 connected to the outer wall of the housing 1. A driving screw 40 is threadedly connected to the driving block 39 in the protective shell 38, and a driving motor 41 is fixedly installed at one end of the protective shell 38 and connected to the driving screw 40, wherein the insulation plate 11 is provided with avoidance grooves (not shown in the figure) extending along its circumference corresponding to the shell inlet 3, shell outlet 4 and sewage pipe 9, so that the insulation plate 11 does not affect the use of the shell inlet 3, shell outlet 4 and sewage pipe 9 when it is rotating, and an extension groove 42 is provided on the top of the protective shell 38 for the water inlet main pipe 27 to extend, and the cleaning plate 12 is connected to the sliding part 37.

[0035] The sliding member 37 includes a first plate 43 and a second plate 44 which are respectively slidably connected to the first sliding groove 35 and are respectively located on the inner and outer sides of the insulation plate 11 , and a third plate 45 which is fixedly connected between the first plate 43 and the second plate 44 and slidably connected to the second sliding groove 36 .

[0036] By arranging a thermal insulation plate 11 in the shell 1, and by respectively opening a first sliding groove 35 on the shell 1 and a second sliding groove 36 on the thermal insulation plate 11, the sliding member 37 can not only always ensure the sealing inside the shell 1 during the sliding process, but also ensure the thermal insulation of the reboiler under normal operating conditions by setting the insulation layer, reduce heat escape to the outside, and thus reduce energy waste.

[0037] In order to further improve the cleaning effect of the cleaning plate 12 on the U-shaped heat exchange tube 2, a connecting member 48 is provided between the sliding member 37 and the cleaning plate 12. The cleaning plate 12 includes a first semicircular plate 46 and a second semicircular plate 47. The connecting member 48 includes a support plate 49 and a driving plate 50 arranged on one side of the support plate 49. One end of the driving plate 50 is fixedly connected to the sliding member 37. The cut edges of the first semicircular plate 46 and the second semicircular plate 47 are elastically hinged to the other side of the support plate 49. When there is no external force, the first semicircular plate 46 and the second semicircular plate 47 are in an unfolded state. The upper and lower sides of the driving plate 50 are respectively fixedly connected with an upper push rod 51 and a lower push rod 52 that are slidably penetrated through the support plate 49. The ends of the upper push rod 51 and the lower push rod 52 are provided with rollers 53 that respectively roll and abut against the first semicircular plate 46 and the second semicircular plate 47. A supporting spring 54 is provided between the support plate 49 and the driving plate 50.

[0038] With the cooperation of the support plate 49, the drive plate 50, the upper push rod 51 and the lower push rod 52, when the drive member 34 pushes the cleaning plate 12 to move to the bending part of the U-shaped heat exchange tube 2, since the cleaning plate 12 is restricted from moving by the U-shaped heat exchange tube 2, the drive plate 50 overcomes the elastic force of the support spring 54 between the support plate 49 and the support plate 49, and applies the force directly to the first semicircular plate 46 and the second semicircular plate 47 through the upper push rod 51 and the lower push rod 52, so that the first semicircular plate 46 and the second semicircular plate 47 can be folded to clean the bending part of the U-shaped heat exchange tube 2, thereby ensuring the cleaning efficiency of the U-shaped heat exchange tube 2.

[0039] The implementation principle of the present invention is: By providing a cleaning plate 12 and a driving member 34, in cooperation with a cleaning member 15 provided in the through hole 13, after the reboiler has been used for a long time, when the outer wall of the U-shaped heat exchange tube 2 needs to be cleaned due to scaling, the driving motor 41 is started. Driven by the driving motor 41, the sliding member 37 moves back and forth along the axial direction of the shell 1, thereby driving the cleaning plate 12 slidably sleeved on the U-shaped heat exchange tube 2 to move, and the dirt on the outer wall of the U-shaped heat exchange tube 2 is scraped off by the cleaning member 15. When not in use, the cleaning plate 12 moves to one end of the shell 1 relative to the liquid inlet chamber 5 and the liquid outlet chamber 6, so as to support the U-shaped heat exchange tube 2, reduce the occupation of the internal space of the shell 1, and do not affect the use of the heat exchanger.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency reboiler, comprising a shell (1), and a U-shaped heat exchange tube (2) arranged in the shell (1), wherein the shell (1) is provided with a shell-side inlet (3) and a shell-side outlet (4), and one end of the shell (1) is provided with a liquid inlet cavity (5) and a liquid outlet cavity (6), and both ends of the U-shaped heat exchange tube (2) are respectively connected to the liquid inlet cavity (5) and the liquid outlet cavity (6), and the shell (1) is respectively provided with a tube-side inlet (7) and a tube-side outlet (8) corresponding to the liquid inlet cavity (5) and the liquid outlet cavity (6), characterized in that: A cleaning plate (12) is sleeved on the U-shaped heat exchange tube (2), and a through hole (13) corresponding to the U-shaped heat exchange tube (2) is formed on the cleaning plate (12), and a cleaning member (15) is provided in each of the through holes (13). The shell (1) is provided with a driving member (34) for driving the cleaning plate (12) to reciprocate along the length direction of the shell (1); The through hole (13) is in the shape of a regular polygon and has a plurality of supporting surfaces (14), each of the supporting surfaces (14) being provided with a cleaning member (15), the cleaning member (15) comprising a roller brush (16) rotatably supported on the supporting surface (14), the roller brush (16) having a square cross section and two opposite corners having rounded corners (19) whose centers coincide with the rotation axis of the roller brush (16), the two surfaces of the roller brush (16) adjacent to one rounded corner (19) being respectively a first cleaning surface (20) and a second cleaning surface (21), the two surfaces of the roller brush (16) adjacent to another rounded corner (19) being respectively a first abutting surface (22) and a second abutting surface (23), the first abutting surface (22) being opposite to the first cleaning surface (20), the second abutting surface (23) being opposite to the second cleaning surface (21), the first cleaning surface (20) being provided with a silver wire cloth layer (24), and the second cleaning surface (21) being arranged as a flexible cleaning surface.

2. A high efficiency reboiler according to claim 1, characterized in that: The bottom of the shell (1) is provided with a sewage pipe (9); the cleaning plate (12) is hollow; an annular water storage chamber (25) is provided on the outer periphery of the through hole (13) and inside the cleaning plate (12); a plurality of the annular water storage chambers (25) are interconnected via a connecting pipe (26); and one of the annular water storage chambers (25) is connected to a water inlet main pipe (27) extending to the outside of the shell (1); the roller brush (16) comprises a roller body (17) and a coating layer (18); the coating layer (18) is made of a cleaning sponge material; and the silver wire cloth layer (24) is attached to the outside of the coating layer (18) to form a first cleaning surface (20); The inner wall of the annular water storage chamber (25) is provided with a closing member (28) corresponding to each of the supporting surfaces (14), and the closing member (28) comprises a sealing plate (29) elastically hinged to the inner wall of the annular water outlet groove, and an abutment rod (30) fixedly connected to the sealing plate (29), passing through the supporting surface (14) and extending into the through hole (13), wherein the abutment rod (30) extends in an arc shape around the hinge axis of the sealing plate (29) and is in contact with the supporting surface of the through hole (13). The supporting surface (14) is slidably connected therebetween, the second abutting surface (23) is rotatably abutted against the abutting rod (30), a plurality of evenly distributed water outlet holes (31) connected to the annular water storage cavity (25) are provided on the supporting surface (14), a plurality of evenly distributed closed holes (32) are provided on the sealing plate (29), and when the sealing plate (29) is rotatably abutted against the inner wall of the annular water storage cavity (25), the plurality of closed holes (32) and the plurality of water outlet holes (31) are staggered.

3. A high efficiency reboiler according to claim 2, characterized in that: Elastic sealing rings (33) are fixedly connected to both ends of the through hole (13), the inner wall of the elastic sealing ring (33) is in contact with the U-shaped heat exchange tube (2), and the inner edge of the elastic sealing ring (33) is provided with a folded edge folded toward the roller brush (16).

4. A high efficiency reboiler according to claim 3, characterized in that: An annular cavity (10) is provided inside the peripheral wall of the shell (1), and a temperature insulation plate (11) is provided inside the annular cavity (10).

5. A high efficiency reboiler according to claim 4, characterized in that: The driving member (34) comprises a first sliding groove (35) provided on the peripheral wall of the housing (1) and extending along the length direction thereof, a second sliding groove (36) provided on the heat-insulating plate (11) and extending in a spiral shape around the axis thereof, a sliding member (37) slidably connected to the first sliding groove (35) and the second sliding groove (36), a protective shell (38) fixedly connected to the outer wall of the housing (1) and covering the first sliding groove (35), and a sliding member (37) slidably connected to the protective shell (38). A driving block (39) is provided in the protective shell (38) and fixedly connected to the outer wall of the sliding member (37); a driving screw (40) is rotatably connected to the protective shell (38) and is threadedly connected to the driving block (39); a driving motor (41) is fixedly installed at one end of the protective shell (38) and connected to the driving screw (40); an extension groove (42) is provided on the top of the protective shell (38) for the water inlet main pipe (27) to extend out; and the cleaning plate (12) is connected to the sliding member (37); The sliding member (37) comprises a first plate body (43) and a second plate body (44) which are respectively slidably connected in the first sliding groove (35) and are respectively located on the inner and outer sides of the insulation plate (11), and a third plate body (45) which is fixedly connected between the first plate body (43) and the second plate body (44) and is slidably connected in the second sliding groove (36).

6. A high efficiency reboiler according to claim 5, characterized in that: A connecting member (48) is provided between the sliding member (37) and the cleaning plate (12), the cleaning plate (12) comprising a first semicircular plate (46) and a second semicircular plate (47), the connecting member (48) comprising a supporting plate (49) and a driving plate (50) arranged on one side of the supporting plate (49), one end of the driving plate (50) being fixedly connected to the sliding member (37), the cutting edges of the first semicircular plate (46) and the second semicircular plate (47) being elastically hinged to the other side of the supporting plate (49), and no external When force is applied, the first semicircular plate (46) and the second semicircular plate (47) are in an unfolded state, and the upper and lower sides of the driving plate (50) are respectively fixedly connected with an upper push rod (51) and a lower push rod (52) which are slidably arranged in the supporting plate (49), and the ends of the upper push rod (51) and the lower push rod (52) are respectively provided with rollers (53) which roll against the first semicircular plate (46) and the second semicircular plate (47), and a supporting spring (54) is provided between the supporting plate (49) and the driving plate (50).

7. A distillation tower, characterized in that: It comprises a tower body (55) and a reboiler (58) according to any one of claims 1 to 6, wherein the tower body (55) is connected to a shell side inlet (3) of the reboiler (58) via a first connecting pipe (56), and the tower body (55) is connected to a shell side outlet (4) of the reboiler (58) via a second connecting pipe (57).

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