Low-temperature rectifying tower reboiler

Abstract

The utility model discloses a reboiler of a low-temperature rectifying tower. The reboiler comprises a reboiling shell and a cleaning mechanism, partition plates are respectively arranged at the upper end and the lower end of the inner wall of the reboiling shell, and uniformly distributed heat exchange copper pipes are arranged between the partition plates in a penetrating manner; the cleaning mechanism comprises a circular vertical moving seat and rotary scraping seats, the circular vertical moving seat is connected to the interior of the reboiling shell in a sliding mode, the rotary scraping seats which are evenly distributed are rotatably connected to the interior of the circular vertical moving seat through bearings, the rotary scraping seats and the adjacent heat exchange copper pipes are installed in a matched mode, the cleaning mechanism further comprises a single-chip microcomputer, and the single-chip microcomputer is located outside the reboiling shell. According to the low-temperature rectifying tower reboiler, impurities adhered to the surface of the heat exchange copper pipe can be automatically and rotationally scraped off through the transmission element, the heat conduction efficiency of the heat exchange part in the low-temperature rectifying tower reboiler is effectively improved, and the low-temperature rectifying tower reboiler is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of reboilers, in particular to a reboiler for a low-temperature rectification column. Background Technique

[0002] As the name implies, a reboiler (also known as a re-heater) is used to vaporize a liquid again. Its structure is similar to that of a condenser. However, one is used for cooling, while the reboiler is used for heating and vaporization. Reboilers are often used in combination with rectification columns. A reboiler is a special heat exchanger that can exchange heat and has a vaporization space at the same time. Some reboilers for low-temperature rectification columns include a reboiler tank body. An upper tank body is arranged at the top of the reboiler tank body, and a lower tank body is arranged at the bottom of the reboiler tank body. Several first heat exchange tubes are arranged on one side inside the reboiler tank body, and several second heat exchange tubes are arranged on the other side inside the reboiler tank body. Several baffle plates are arranged inside the reboiler tank body. A baffle is arranged inside the lower tank body. A liquid inlet chamber is arranged on one side inside the lower tank body, and a liquid outlet chamber is arranged on the other side inside the lower tank body. A material inlet pipe is arranged on one side of the lower tank body, a material outlet pipe is arranged at the bottom of the other side of the lower tank body, a second exhaust pipe is arranged at the top of the other side of the lower tank body, a first exhaust pipe is arranged at the top of the upper tank body, a steam inlet pipe is arranged at the top of the reboiler tank body, and a steam outlet pipe is arranged at the top of the reboiler tank body. The material inlet pipe is communicated with the liquid inlet chamber. This device improves the rectification effect through multiple rectifications. However, during the use of the heat exchange tubes, by contacting with the heat medium and using heat transfer, the liquid inside the heat exchange tubes is rectified and evaporated. The heat exchange tubes are in contact with the heat medium for a long time, and impurities in the heat medium adhere to the outer side of the heat exchange tubes, resulting in a reduction in the heat conduction efficiency of the heat exchange tubes, which needs to be improved. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a reboiler for a low-temperature rectification column. This device can automatically rotate and scrape the impurities adhering to the surface of the heat exchange copper tubes through transmission elements, effectively improving the heat conduction efficiency of the heat exchange part in the reboiler for a low-temperature rectification column, and is convenient to use, which can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A reboiler for a low-temperature rectification column, including a reboiler shell and a cleaning mechanism;

[0005] Reboiler shell: Partition plates are respectively arranged at the upper and lower ends of its inner wall, and uniformly distributed heat exchange copper tubes are arranged through between the partition plates;

[0006] Cleaning mechanism: It includes a circular vertical moving seat and a rotating scraping seat. The circular vertical moving seat is slidably connected to the inside of the reboiler shell. Inside the circular vertical moving seat, evenly distributed rotating scraping seats are rotatably connected through bearings. The rotating scraping seats are all installed in cooperation with the adjacent heat exchange copper tubes. This device can automatically rotate and scrape the impurities adhering to the surface of the heat exchange copper tubes through transmission elements, effectively improving the heat conduction efficiency of the heat exchange part in the reboiler of the low-temperature rectification tower, and is convenient to use.

[0007] Furthermore, it also includes a single-chip microcomputer. The single-chip microcomputer is located outside the reboiler shell, and the input end of the single-chip microcomputer is electrically connected to an external power supply, which is convenient for controlling electrical components.

[0008] Furthermore, an air outlet pipe penetrates through the top wall of the reboiler shell. A heat medium inlet pipe and a cold medium discharge pipe respectively penetrate through the side wall of the reboiler shell. A liquid inlet pipe penetrates through the bottom wall of the reboiler shell. The reboiler of the low-temperature rectification tower is connected to the corresponding external pipelines.

[0009] Furthermore, electromagnetic valves are connected in series in the middle of the air outlet pipe, the heat medium inlet pipe, the cold medium discharge pipe, and the liquid inlet pipe. The input ends of the electromagnetic valves are all electrically connected to the output end of the single-chip microcomputer, which controls the opening and closing of the pipelines in the reboiler of the low-temperature rectification tower.

[0010] Furthermore, the cleaning mechanism also includes spiral guide strips. The spiral guide strips are all arranged on the outside of the heat exchange copper tubes. The spiral guide strips are all slidably connected to the adjacent rotating scraping seats, so that while the rotating scraping seats move vertically, they rotate around the outside of the corresponding heat exchange copper tubes through the spiral guide strips.

[0011] Furthermore, the cleaning mechanism also includes a reciprocating lead screw, a driving shaft, and a motor. The reciprocating lead screw is rotatably connected between the partition plates through a sealed bearing. The circular vertical moving seat is threadedly connected to the reciprocating lead screw. A driving shaft is provided at the upper end of the reciprocating lead screw. A motor is provided on the upper side of the reboiler shell. The input end of the motor is electrically connected to the output end of the single-chip microcomputer, and the output shaft of the motor is fixedly connected to the upper end of the driving shaft, so that the cleaning part in the reboiler of the low-temperature rectification tower can move vertically up and down reciprocally.

[0012] Furthermore, a temperature sensor is provided on the side wall of the reboiler shell. The temperature sensor is bidirectionally electrically connected to the single-chip microcomputer, which detects and uploads the temperature of the heat medium in the reboiler of the low-temperature rectification tower.

[0013] Compared with the prior art, the beneficial effects of the present utility model are: This reboiler of the low-temperature rectification tower has the following advantages:

[0014] After the reboiler of the low-temperature rectification tower has been used for a certain period of time, the single-chip microcomputer starts the motor, and its output shaft drives the drive shaft to rotate. The drive shaft drives the reciprocating lead screw to rotate. The reciprocating lead screw is connected by threads, so that the circular vertical moving seat moves vertically up and down along the heat exchange copper tube. During this process, the rotating scraping seat is guided by the spiral guide strip, and thus rotates while moving vertically up and down along the outer side of the heat exchange copper tube, so as to rotate and scrape the impurities adhering to the surface of the heat exchange copper tube, avoiding the influence of impurities on the heat transfer efficiency of the heat exchange copper tube. The reboiler of the low-temperature rectification tower can automatically rotate and scrape the impurities adhering to the surface of the heat exchange copper tube through the transmission element, effectively improving the heat conduction efficiency of the heat exchange part in the reboiler of the low-temperature rectification tower, and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0017] Figure 3 is an enlarged structural diagram of part A of the present invention.

[0018] In the figure: 1 reboiler shell, 2 single-chip microcomputer, 3 gas outlet pipe, 4 hot medium inlet pipe, 5 cold medium discharge pipe, 6 liquid inlet pipe, 7 solenoid valve, 8 partition plate, 9 cleaning mechanism, 91 circular vertical moving seat, 92 rotating scraping seat, 93 spiral guide strip, 94 reciprocating lead screw, 95 drive shaft, 96 motor, 10 heat exchange copper tube, 11 temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-3 , this embodiment provides a technical solution: a reboiler for a low-temperature rectification tower, including a reboiler shell 1 and a cleaning mechanism 9;

[0021] Reboiling shell 1: Partition plates 8 are respectively arranged at the upper and lower ends of its inner wall. Heat exchange copper tubes 10 evenly distributed are arranged through between the partition plates 8. It also includes a single-chip microcomputer 2 which is located outside the reboiling shell 1. The input end of the single-chip microcomputer 2 is electrically connected to an external power supply. An air outlet pipe 3 penetrates through the top wall of the reboiling shell 1. A heat medium inlet pipe 4 and a cold medium discharge pipe 5 respectively penetrate through the side wall of the reboiling shell 1. A liquid inlet pipe 6 penetrates through the bottom wall of the reboiling shell 1. Electromagnetic valves 7 are connected in series in the middle of the air outlet pipe 3, the heat medium inlet pipe 4, the cold medium discharge pipe 5 and the liquid inlet pipe 6. The input ends of the electromagnetic valves 7 are all electrically connected to the output end of the single-chip microcomputer 2. A temperature sensor 11 is arranged on the side wall of the reboiling shell 1. The temperature sensor 11 is electrically connected to the single-chip microcomputer 2 bidirectionally. When using the low-temperature rectification tower reboiler, the air outlet pipe 3, the heat medium inlet pipe 4, the cold medium discharge pipe 5 and the liquid inlet pipe 6 are respectively connected to the corresponding external pipelines. Subsequently, the liquid enters the bottom of the device through the liquid inlet pipe 6. The heat medium enters between the two partition plates 8 through the heat medium inlet pipe 4. The heat medium heats the liquid in the heat exchange copper tube 10 through heat transfer through the heat exchange copper tube 10. After partial liquid evaporates, it is discharged along the air outlet pipe 3. After the heat of the heat medium is released, it is discharged through the cold medium discharge pipe 5, so as to reboil the liquid in the low-temperature rectification tower. The single-chip microcomputer 2 starts the temperature sensor 11 to detect the temperature of the heat medium in the device, and transmits the detection result to the single-chip microcomputer 2 in the form of an electrical signal, and controls the electromagnetic valve 7 through the single-chip microcomputer 2 to realize the opening and closing control of the internal pipeline of the device;

[0022] Cleaning mechanism 9: It includes a circular vertical moving seat 91 and a rotating scraping seat 92. The circular vertical moving seat 91 is slidably connected to the inside of the reboiler shell 1. Inside the circular vertical moving seat 91, evenly distributed rotating scraping seats 92 are rotatably connected through bearings. The rotating scraping seats 92 are all installed in cooperation with the adjacent heat exchange copper tubes 10. The cleaning mechanism 9 further includes spiral guide strips 93. The spiral guide strips 93 are all arranged on the outer sides of the heat exchange copper tubes 10. The spiral guide strips 93 are all slidably connected to the adjacent rotating scraping seats 92. The cleaning mechanism 9 further includes a reciprocating lead screw 94, a driving shaft 95, and a motor 96. The reciprocating lead screw 94 is rotatably connected between the partition plates 8 through a sealed bearing. The circular vertical moving seat 91 is threadedly connected to the reciprocating lead screw 94. The upper end of the reciprocating lead screw 94 is provided with a driving shaft 95. A motor 96 is provided on the upper side of the reboiler shell 1. The input end of the motor 96 is electrically connected to the output end of the single-chip microcomputer 2. The output shaft of the motor 96 is fixedly connected to the upper end of the driving shaft 95. When the low-temperature rectification tower reboiler is used for a certain period of time, the single-chip microcomputer 2 starts the motor 96 so that its output shaft drives the driving shaft 95 to rotate. The driving shaft 95 drives the reciprocating lead screw 94 to rotate. The reciprocating lead screw 94 makes the circular vertical moving seat 91 move vertically up and down along the heat exchange copper tube 10 through threaded connection. During this process, the rotating scraping seat 92 is guided by the spiral guide strip 93, so as to rotate while moving vertically up and down along the outer side surface of the heat exchange copper tube 10, thereby rotating and scraping the impurities adhered to the surface of the heat exchange copper tube 10, avoiding the influence of impurities on the heat transfer efficiency of the heat exchange copper tube 10. For this low-temperature rectification tower reboiler, the impurities adhered to the surface of the heat exchange copper tube 10 can be automatically rotated and scraped through the transmission components, effectively improving the heat conduction efficiency of the heat exchange part in the low-temperature rectification tower reboiler, and it is convenient to use.

[0023] The working principle of the reboiler of the low-temperature rectification column provided by the present utility model is as follows: When using the reboiler of the low-temperature rectification column, the gas outlet pipe 3, the hot medium inlet pipe 4, the cold medium discharge pipe 5 and the liquid inlet pipe 6 are respectively connected to the corresponding external pipelines. Subsequently, the liquid enters the bottom of the device through the liquid inlet pipe 6, and the hot medium enters between the two partition plates 8 through the hot medium inlet pipe 4. The hot medium heats the liquid in the heat exchange copper pipe 10 through heat transfer via the heat exchange copper pipe 10. After partial liquid evaporates, it is discharged along the gas outlet pipe 3, and after the heat of the hot medium is released, it is discharged through the cold medium discharge pipe 5, thereby realizing the reboiling treatment of the liquid in the low-temperature rectification column. The single-chip microcomputer 2 starts the temperature sensor 11 to detect the temperature of the hot medium in the device, and transmits the detection result to the single-chip microcomputer 2 in the form of an electrical signal. The solenoid valve 7 is controlled by the single-chip microcomputer 2 to realize the opening and closing control of the internal pipeline of the device. When the reboiler of the low-temperature rectification column has been used for a certain period of time, the single-chip microcomputer 2 starts the motor 96, and its output shaft drives the drive shaft 95 to rotate. The drive shaft 95 drives the reciprocating lead screw 94 to rotate. The reciprocating lead screw 94 makes the circular vertical moving seat 91 move vertically up and down along the heat exchange copper pipe 10 through threaded connection. During this process, the rotating scraping seat 92 moves vertically up and down along the outer side of the heat exchange copper pipe 10 while rotating under the guidance of the spiral guiding strip 93, so as to perform a rotating scraping treatment on the impurities adhering to the surface of the heat exchange copper pipe 10, avoiding the influence of impurities on the heat transfer efficiency of the heat exchange copper pipe 10.

[0024] It should be noted that in the above embodiments, the single-chip microcomputer 2 can adopt MCS-51, the solenoid valve 7 can adopt ZQDF-3Y-40, the motor 96 can adopt Y80M1-2, and the temperature sensor 11 can adopt AM2303. The single-chip microcomputer 2 controls the solenoid valve 7, the motor 96 and the temperature sensor 11 to work using the commonly used methods in the prior art.

[0025] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A cryogenic distillation tower reboiler, characterized in that: It comprises a reboiling shell (1) and a cleaning mechanism (9); Reboiler shell (1): partition plates (8) are respectively provided at the upper and lower ends of the inner wall thereof, and evenly distributed heat exchange copper tubes (10) are provided between the partition plates (8); The cleaning mechanism (9) comprises a circular vertical displacement seat (91) and a rotating scraper seat (92). The circular vertical displacement seat (91) is slidably connected to the interior of the reboiler shell (1). The interior of the circular vertical displacement seat (91) is rotatably connected to evenly distributed rotating scrapers (92) via bearings. The rotating scrapers (92) are all installed in cooperation with adjacent heat exchange copper tubes (10).

2. The cryogenic distillation tower reboiler according to claim 1, characterized in that: It also comprises a single chip microcomputer (2), wherein the single chip microcomputer (2) is located outside the reboiler shell (1), and an input end of the single chip microcomputer (2) is electrically connected to an external power supply.

3. The cryogenic distillation tower reboiler according to claim 2, characterized in that: An air outlet pipe (3) is provided through the top wall of the reboiling shell (1), a hot medium inlet pipe (4) and a cold medium outlet pipe (5) are provided through the side walls of the reboiling shell (1), and a liquid inlet pipe (6) is provided through the bottom wall of the reboiling shell (1).

4. The cryogenic distillation tower reboiler according to claim 3, characterized in that: The middle parts of the air outlet pipe (3), the hot medium inlet pipe (4), the cold medium discharge pipe (5) and the liquid inlet pipe (6) are all connected in series with a solenoid valve (7), and the input end of the solenoid valve (7) is electrically connected to the output end of the single chip computer (2).

5. The cryogenic distillation tower reboiler according to claim 1, characterized in that: The cleaning mechanism (9) further comprises spiral guide bars (93), which are arranged on the outside of the heat exchange copper tube (10) and are slidably connected to adjacent rotating scraper seats (92).

6. The cryogenic distillation tower reboiler according to claim 2, characterized in that: The cleaning mechanism (9) further comprises a reciprocating screw (94), a driving shaft (95) and a motor (96); the reciprocating screw (94) is rotatably connected between the partition plates (8) via a sealed bearing; the circular vertical displacement seat (91) is threadedly connected to the reciprocating screw (94); the driving shaft (95) is disposed at the upper end of the reciprocating screw (94); the motor (96) is disposed on the upper side of the reboiler shell (1); the input end of the motor (96) is electrically connected to the output end of the single chip microcomputer (2); and the output shaft of the motor (96) is fixedly connected to the upper end of the driving shaft (95).

7. The cryogenic distillation tower reboiler according to claim 2, characterized in that: A temperature sensor (11) is provided on the side wall of the reboiling shell (1), and the temperature sensor (11) is bidirectionally electrically connected to the single-chip computer (2).

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