BDO waste liquid treatment device

Abstract

The invention relates to the technical field of wastewater treatment, and particularly discloses a BDO waste liquid treatment device, the upper end of a heat exchange pipe is communicated with a liquid discharge cavity, the lower end of the heat exchange pipe is communicated with a liquid inlet cavity, a cleaning assembly comprises a first sleeve, a second sleeve and a cleaning rod, the first sleeve is rotatably mounted at the bottom end of the heat exchange pipe and can move up and down, and a liquid inlet is formed in the peripheral side of the first sleeve; the second sleeve is rotationally installed at the top end of the heat exchange pipe and connected with the partition plate on the uppermost side in an up-down sliding mode, a liquid outlet is formed in the peripheral side of the second sleeve, when the second sleeve moves upwards till the liquid outlet completely enters the collecting cavity, the liquid inlet can further communicate with the liquid inlet cavity, and the cleaning rod is arranged in the heat exchange pipe and can be attached to the inner wall of the heat exchange pipe. The upper end of the cleaning rod is connected with the sleeve II, and the lower end is connected with the sleeve I; the cleaning rod rotates to clean impurities attached to the inner wall of the heat exchange pipe, the cleaned impurities are pushed into the collecting cavity, and the heat exchange efficiency of waste liquid and superheated steam can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a BDO waste liquid treatment device. Background Art

[0002] BDO, or 1,4-butanediol, is an important organic and fine chemical raw material. BDO waste liquid refers to a large amount of waste liquid containing components such as methanol, n-propanol, and n-butanol generated in the process of producing 1,4-butanediol. The treatment of these waste liquids has always been one of the challenges faced by the chemical industry, because they not only contain valuable chemicals, but also may cause pollution to the environment.

[0003] When treating BDO waste liquid, a distillation tower and a thermosyphon reboiler, condenser and other equipment used in conjunction with the distillation tower are usually used for treatment. During the distillation process, the liquid at the bottom of the distillation tower enters the thermosyphon reboiler through natural circulation. In the thermosyphon reboiler, the liquid is heated by superheated steam, and part of the liquid begins to vaporize to form a gas-liquid mixture. Since the density of the gas-liquid mixture is less than that of the unvaporized liquid, this density difference becomes a driving force, causing the unvaporized liquid to continue to be "siphoned" into the reboiler for heating and vaporization. The heated and vaporized gas-liquid mixture automatically returns to the distillation tower through the outlet pipeline of the reboiler.

[0004] The patent document with the authorization announcement number CN206635064U discloses a modularly installed energy-saving membrane distillation wastewater treatment device, including a primary treatment module and a post-treatment module. The primary treatment module includes a first membrane distiller submodule, a second membrane distiller submodule and a heat pump submodule. The heat pump submodule includes a first reboiler, a second reboiler and at least one compressor; the hot material outlet of the first reboiler is connected to the gas-liquid mixed feed inlet of the first membrane distiller submodule, the concentrated liquid outlet of the first membrane distiller submodule is connected to the cold material inlet of the second reboiler, the hot material outlet of the second reboiler is connected to the gas-liquid mixed feed inlet of the second membrane distiller submodule, and the concentrated liquid outlet of the second membrane distiller submodule is connected to the post-treatment module; the top steam of the first membrane distiller submodule and the second membrane distiller submodule are connected to the compressor inlet after merging, and the compressor outlet is connected to the steam inlet of the first reboiler; the device is easy to assemble, has good energy-saving effect, and is suitable for various types of sewage treatment.

[0005] The above technical solution adopts a thermosyphon reboiler, and partially vaporizes the pretreated raw water in the thermosyphon reboiler to form a gas-liquid mixture. After the pretreated raw water is heated, its volume expands, its density becomes smaller and lighter, and it rises. Using the density difference as a driving force, it enters the membrane distiller from the gas-liquid mixed feed inlet of the membrane distiller module, and is supplemented by the surrounding cold liquid to form a forced circulation, which not only saves the circulation pump, but also achieves a higher gas-water ratio inside the membrane distiller. However, since the BDO waste liquid contains impurities such as photoresist that are not volatile when heated, when the BDO waste liquid is treated, when the BDO waste liquid is heated in the heat exchange tube in the reboiler, the impurities such as photoresist will be concentrated and adhere to the inner wall of the heat exchange tube, which will reduce the heat exchange efficiency between the waste liquid and the superheated steam in the reboiler, thereby affecting the heating effect of the waste liquid. Summary of the invention

[0006] The present invention provides a BDO waste liquid treatment device, which aims to solve the problem in the related art that when the BDO waste liquid is heated in the heat exchange tube in the reboiler, impurities such as photoresist will be concentrated and adhere to the inner wall of the heat exchange tube, which will reduce the heat exchange efficiency between the waste liquid and the superheated steam in the reboiler.

[0007] A BDO waste liquid treatment device comprises a shell and a plurality of heat exchange tubes arranged in the shell, and also comprises three partitions, a cleaning assembly, a driving assembly 1 and a driving assembly 2. The three partitions are fixedly installed in the shell and arranged in the up-down direction. The three partitions divide the internal space of the shell into a collecting chamber, a drainage chamber, a heat exchange chamber and a liquid inlet chamber from top to bottom in sequence. The upper end of the heat exchange tube is connected to the drainage chamber, and the lower end is connected to the liquid inlet chamber. The cleaning assembly comprises a sleeve 1, a sleeve 2 and a cleaning rod. The sleeve 1 is rotatably installed at the bottom end of the heat exchange tube and can move up and down. The outer peripheral side of the sleeve 1 is provided with a liquid inlet The second sleeve is rotatably installed at the top of the heat exchange tube and is connected to the uppermost partition for sliding up and down. A drainage port is provided on the outer peripheral side of the second sleeve, and when the second sleeve moves upward until the drainage port completely enters the collecting chamber, the liquid inlet can also be connected to the liquid inlet chamber. The cleaning rod is arranged in the heat exchange tube and can fit the inner wall of the heat exchange tube. The upper end of the cleaning rod is connected to the second sleeve, and the lower end is connected to the first sleeve. The driving component one can drive the first sleeve and the second sleeve to rise and fall, and the driving component two can drive the second sleeve and the cleaning rod connected to the second sleeve to rotate.

[0008] The beneficial effects of the present invention are as follows: by controlling the operation of drive assembly one and drive assembly two, the cleaning rod can be driven to rotate and impurities adhered to the inner wall of the heat exchange tube can be cleaned, and the cleaned impurities can be pushed into the collection chamber, thereby improving the heat exchange efficiency of waste liquid and superheated steam.

[0009] Preferably, the lower end of the cleaning rod is hinged with a rotating rod, the lower end of the rotating rod is hinged with sleeve one, and a sealing plate is connected to the inner side of sleeve two for sliding up and down, and the sealing plate can rotate synchronously with the sleeve two, and the upper end of the cleaning rod is hinged with the sealing plate, and the hinge points of the cleaning rod and the sealing plate and the hinge points of the rotating rod and the sleeve one are respectively located on both sides of the heat exchange tube, and a torsion spring is provided at the hinge of the rotating rod and the cleaning rod, and the force applied by the torsion spring to the cleaning rod is away from the side where the hinge point of the cleaning rod and the sealing plate is located. The effect is that, during normal waste liquid treatment, the cleaning rod can be prevented from fitting against the inner wall of the heat exchange tube, thereby improving the heat exchange efficiency between the waste liquid and the superheated steam.

[0010] Preferably, a push rod corresponding to the upper and lower parts of the sealing plate is provided in the collecting chamber, and an elastic member is provided at the push rod, and the elastic member can apply a downward elastic force to the push rod.

[0011] Preferably, the driving assembly 1 includes a support plate 1 and a driving member 1, the support plate 1 is arranged at the bottom of the liquid inlet chamber, the sleeve 1 is rotatably connected to the support plate 1, and the driving member 1 can drive the support plate 1 to rise and fall.

[0012] Preferably, the second driving component includes a second supporting plate, a gear ring, a gear one and a second driving member. The second supporting plate is arranged at the bottom of the collecting chamber and can be raised and lowered synchronously with the second sleeve. The gear ring is fixedly mounted on the upper end of the second sleeve. The gear one is rotatably mounted on the second supporting plate and meshes with the gear ring. The second driving member can drive the gear one to rotate.

[0013] Preferably, a plurality of baffles arranged in the up-down direction are provided in the heat exchange chamber, and the plurality of baffles are staggered to form an S-shaped channel in the heat exchange chamber. The effect is that the S-shaped channel formed by the plurality of baffles can extend the flow path of the superheated steam in the heat exchange chamber, thereby improving the heating effect on the liquid in the heat exchange tube.

[0014] Preferably, the cleaning components have two groups, which has the effect that the two groups of cleaning components are used to operate alternately, which can ensure the normal and uninterrupted operation of the waste liquid treatment and is convenient to use.

[0015] Preferably, the uppermost partition includes a filter plate for filtering impurities in the waste liquid, which has the effect that the liquid and impurities entering the collection chamber will be filtered by the filter plate, and the impurities will be retained on the upper part of the filter plate, which is convenient for collecting impurities. The liquid after filtering the impurities will enter the drainage chamber and can flow back into the distillation tower.

[0016] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: when the present invention processes waste liquid, by controlling the operation of drive component one and drive component two, the cleaning rod can be driven to rotate and impurities adhered to the inner wall of the heat exchange tube can be cleaned, and the cleaned impurities can be pushed into the collection chamber, which can improve the heat exchange efficiency between the waste liquid and the superheated steam and ensure the heating effect of the superheated steam on the waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the installation structure of the driving component 2 of the present invention.

[0020] Figure 4 It is a schematic diagram of the installation structure of the rotating rod of the present invention.

[0021] Figure 5 It is a schematic diagram of the installation structure of the sealing plate of the present invention.

[0022] Figure 6 It is a schematic diagram of the installation structure of the filter plate of the present invention.

[0023] Reference numerals: 1. Shell; 11. Collecting chamber; 12. Liquid discharge chamber; 13. Heat exchange chamber; 14. Liquid inlet chamber; 15. Steam inlet; 16. Steam outlet; 2. Heat exchange tube; 31. Partition plate 1; 311. Filter plate; 32. Partition plate 2; 33. Partition plate 3; 34. Top plate; 35. Baffle plate; 41. Casing pipe 1; 411. Liquid inlet; 42. Casing pipe 2; 421. Liquid outlet; 422. Vertical slot; 43. Cleaning rod; 44. Rotating rod; 45. Sealing plate; 46. Push rod; 47. Elastic member; 51. Support plate 1; 52. Driving member 1; 61. Support plate 2; 62. Ring gear; 63. Gear 1; 64. Gear 2; 65. Gear 3; 66. Driving member 2; 67. Rotating shaft; 7. Distillation tower. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] like Figures 1 to 6As shown, the BDO waste liquid treatment device according to the embodiment of the present invention includes a shell 1 and a plurality of heat exchange tubes 2 arranged in the shell 1, and also includes three partitions, a cleaning component, a driving component 1 and a driving component 2. The three partitions are fixedly installed in the shell 1 and arranged in the up and down directions. The three partitions divide the internal space of the shell 1 into a collecting chamber 11, a drainage chamber 12, a heat exchange chamber 13 and a liquid inlet chamber 14 from top to bottom. The upper end of the heat exchange tube 2 is connected to the drainage chamber 12, and the lower end is connected to the liquid inlet chamber 14.

[0026] Specifically, the shell 1 is vertically arranged, and the three partitions are defined from top to bottom as partition one 31, partition two 32 and partition three 33 respectively. The collecting chamber 11 is located at the upper part of partition one 31, the drainage chamber 12 is located between partition one 31 and partition two 32, the heat exchange chamber 13 is located between partition two 32 and partition three 33, and the liquid inlet chamber 14 is located at the lower part of partition three 33. A plurality of heat exchange tubes 2 are evenly arranged in the shell 1, the upper liquid outlet of the heat exchange tube 2 is located in the drainage chamber 12, and the lower liquid inlet is located in the liquid inlet chamber 14, and the liquid inlet chamber 14 is connected with the liquid outlet at the bottom of the distillation tower 7, and the drainage chamber 12 is connected with the liquid inlet at the upper part of the distillation tower 7. The shell 1 is also provided with a steam inlet 15 and a steam outlet 16 connected with the heat exchange chamber 13, and the steam inlet 15 is located above the steam outlet 16.

[0027] During the treatment, the liquid at the bottom of the distillation tower 7 first enters the liquid inlet chamber 14, and then flows upward through the heat exchange tube 2. The superheated steam enters the heat exchange chamber 13 from the steam inlet 15 and gradually flows downward. During this process, the superheated steam will heat the liquid in the heat exchange tube 2, causing part of the liquid to begin to vaporize. Then, the gas-liquid mixture in the heat exchange tube 2 will first enter the liquid discharge chamber 12, and then flow back to the distillation tower 7.

[0028] Among them, a plurality of baffles 35 arranged in the up and down directions are provided in the heat exchange chamber 13, and the plurality of baffles 35 are staggered to form an S-shaped channel in the heat exchange chamber 13. The S-shaped channel formed by the plurality of baffles 35 can extend the flow path of the superheated steam in the heat exchange chamber 13, and can improve the heating effect on the liquid in the heat exchange tube 2.

[0029] like Figures 2 to 5As shown, the cleaning assembly includes a sleeve 1 41, a sleeve 2 42 and a cleaning rod 43. The sleeve 1 41 is rotatably installed at the bottom end of the heat exchange tube 2 and can move up and down. The outer peripheral side of the sleeve 1 41 is provided with a liquid inlet 411. The sleeve 2 42 is rotatably installed at the top end of the heat exchange tube 2 and is connected to the uppermost partition by sliding up and down. The outer peripheral side of the sleeve 2 42 is provided with a drain port 421, and when the sleeve 2 42 moves upward until the drain port 421 completely enters the collecting chamber 11, the liquid inlet 411 can also be connected with the liquid inlet chamber 14, that is, the height of the liquid inlet 411 is higher than the height of the drain port 421. The cleaning rod 43 is arranged in the heat exchange tube 2 and can fit the inner wall of the heat exchange tube 2. The upper end of the cleaning rod 43 is connected to the sleeve 2 42, and the lower end is connected to the sleeve 1 41.

[0030] Specifically, the cleaning assembly includes multiple sleeves 41, multiple sleeves 42 and multiple cleaning rods 43. The multiple sleeves 41 are rotatably installed at the bottom end of the heat exchange tube 2, and the multiple sleeves 42 are rotatably installed at the top of the heat exchange tube 2. The sleeves 42 are connected to the partition 31 for up and down sliding, and the multiple cleaning rods 43 are arranged in the multiple heat exchange tubes 2 one by one.

[0031] The lower end of the cleaning rod 43 is hinged with a rotating rod 44, and the lower end of the rotating rod 44 is hinged with the bottom of the sleeve 1 41. The sleeve 2 42 is provided with a vertical groove 422, and the sealing plate 45 is installed in the vertical groove 422 in a sliding manner, so that the sealing plate 45 and the sleeve 2 42 can rotate synchronously. The upper end of the cleaning rod 43 is hinged with the sealing plate 45, and the hinge point of the cleaning rod 43 and the sealing plate 45 and the hinge point of the rotating rod 44 and the sleeve 1 41 are respectively located on both sides of the heat exchange tube 2, that is, when the hinge point of the cleaning rod 43 and the sealing plate 45 is located in the heat exchange tube 2 When the rotating rod 44 is turned to the right side, the hinge point between the rotating rod 44 and the sleeve 41 is located on the left side of the heat exchange tube 2. At this time, the cleaning rod 43 does not fit the inner wall of the heat exchange tube 2. A torsion spring (not shown in the figure) is provided at the hinge of the rotating rod 44 and the cleaning rod 43. The two ends of the torsion spring are respectively fixedly connected to the rotating rod 44 and the cleaning rod 43. The force applied by the torsion spring to the cleaning rod 43 is away from the side where the hinge point between the cleaning rod 43 and the sealing plate 45 is located, that is, the torsion spring can apply a force to the cleaning rod 43 so that the cleaning rod 43 does not fit the inner wall of the heat exchange tube 2.

[0032] A push rod 46 corresponding to the sealing plate 45 is provided in the collecting chamber 11, and an elastic member 47 is provided at the push rod 46. The elastic member 47 can apply a downward elastic force to the push rod 46. Specifically, a top plate 34 is fixedly installed in the shell 1, and the top plate 34 is located above the partition 31. There are multiple push rods 46, and the multiple push rods 46 correspond one by one to the sealing plates 45 arranged in the multiple sleeves 42. An elastic member 47 is provided between each push rod 46 and the top plate 34. The elastic member 47 can be a spring, and its upper and lower ends are respectively fixedly connected to the top plate 34 and the push rod 46. When the push rod 46 moves upward, the elastic member 47 can apply a downward force to the push rod 46.

[0033] like Figure 2 and Figure 3 As shown, the driving component 1 can drive the sleeve 1 41 and the sleeve 2 42 to rise and fall. Specifically, the driving component 1 includes a support plate 151 and a driving member 152. The support plate 151 is arranged at the bottom of the liquid inlet chamber 14. The sleeve 141 is rotatably connected to the support plate 151. The driving member 152 can be a hydraulic cylinder, and its upper telescopic end is fixedly connected to the support plate 151. The driving member 152 is controlled to extend, and can drive the support plate 151 and the sleeve 141 to rise. Through the cleaning rod 43 and the sealing plate 45, the sleeve 2 42 can also be pushed to rise.

[0034] It can be understood that in some other embodiments, the rising of sleeve one 41 and sleeve two 42 can be achieved without adopting the above-mentioned drive component one. For example, a telescopic drive member is installed at the bottom of each sleeve one 41, and the telescopic drive member is vertically arranged. The telescopic drive member can be a cylinder or a hydraulic cylinder. By controlling the extension of the telescopic drive member, the sleeve one 41 can also be driven to rise, and the sleeve two 42 can also be pushed to rise through the cleaning rod 43 and the sealing plate 45.

[0035] like Figures 2 to 6As shown, the driving assembly 2 can drive the sleeve 2 42 and the cleaning rod 43 connected to the sleeve 2 42 to rotate. Specifically, the driving assembly 2 includes a support plate 2 61, a gear ring 62, a gear 1 63 and a driving member 2 66. The support plate 2 61 is arranged at the bottom of the collection chamber 11. The sleeve 2 42 passes through the support plate 2 61 from the bottom of the support plate 2 61. The sleeve 2 42 can be raised and lowered synchronously with the support plate 2 61, and the sleeve 2 42 can rotate relative to the support plate 2 61. The upper end of each sleeve 2 42 is fixedly mounted with a gear ring 62, and the gear ring 62 is located in the collection chamber 11. The two adjacent sleeves 42 are fixedly mounted with the gear ring 62. The gear ring 62 is located in the collection chamber 11. The gear rings 62 are meshed with each other, the gear one 63 is rotatably mounted on the support plate two 61 and meshed with at least one of the gear rings 62, the gear two 64 is coaxially connected to the top of the gear one 63, the gear two 64 is rotatably mounted on the upper part of the top plate 34, the driving member two 66 can be a motor, and its output end is fixedly connected with the gear three 65, the gear three 65 is meshed with the gear two 64, so as to control the operation of the driving member two 66, and can drive the gear three 65, the gear two 64 and the gear one 63 to rotate, and through the meshing of the gear one 63 and the gear ring 62, multiple sleeves two 42 can be driven to rotate at the same time.

[0036] Among them, gear one 63 can be raised and lowered synchronously with support plate two 61, and a rotating shaft 67 is coaxially fixedly connected to gear one 63. The rotating shaft 67 movably passes through the top plate 34, and the rotating shaft 67 and gear two 64 are connected by a key slot so that the rotating shaft 67 and gear two 64 can rotate synchronously, and the rotating shaft 67 can be raised and lowered relative to gear two 64.

[0037] It can be understood that in some other embodiments, the rotation of the sleeve 2 42 and the cleaning rod 43 connected to the sleeve 2 42 can be achieved without adopting the above-mentioned drive component 2. For example, a ring gear 62 is fixedly installed on the upper end of each sleeve 2 42, and two adjacent ring gears 62 are meshed. A motor is fixedly installed on the upper part of the support plate 61, and a gear is fixedly installed on the output end of the motor, and the gear is meshed with one of the ring gears 62. At this time, the motor can be controlled to operate, and the rotation of the sleeve 2 42 and the cleaning rod 43 connected to the sleeve 2 42 can also be achieved.

[0038] During normal waste liquid treatment, the liquid inlet 411 on the sleeve 1 41 and the liquid outlet 421 on the sleeve 2 42 are both in an open state, and the cleaning rod 43 is in an inclined state and does not fit the inner wall of the heat exchange tube 2. When it is necessary to clean the impurities adhering to the inner wall of the heat exchange tube 2, the driving member 1 52 is first controlled to extend to drive the support plate 1 51 and the sleeve 1 41 to move upward. When the sleeve 1 41 moves upward, the sealing plate 45, the sleeve 2 42, the support plate 2 61 and the gear 2 are driven by the rotating rod 44 and the cleaning rod 43. When the sealing plate 45 moves upward and contacts the push rod 46, as the driving member 1 52 continues to extend and drives the sealing plate 45 to continue to move upward, the elastic member 47 will be compressed and exert a downward force on the sealing plate 45, the rotating rod 44 will rotate, and the lower end of the cleaning rod 43 will gradually approach the inner wall of the heat exchange tube 2 until the cleaning rod 43 is completely attached to the inner wall of the heat exchange tube 2. In this process, the drain port 421 on the sleeve 2 42 will first completely enter the collecting chamber 11, and then the drain port 421 on the sleeve 1 41 will The liquid inlet 411 of the heat exchange tube 2 will be completely blocked, and then the second sleeve 42 will be driven to rotate by controlling the operation of the second driving member 66. When the second sleeve 42 rotates, the sealing plate 45 and the cleaning rod 43 are driven to rotate. At this time, the cleaning rod 43 can clean the impurities adhering to the inner wall of the heat exchange tube 2. Next, the driving member 52 is controlled to shrink, and the sleeves 41 and the second sleeve 42 will gradually descend. When the liquid inlet 411 on the sleeve 41 is just partially opened, the liquid discharge port 421 on the second sleeve 42 is still completely closed. In the collecting chamber 11, at this time, the liquid entering the liquid inlet chamber 14 at the bottom of the distillation tower 7 will enter the heat exchange tube 2 through the liquid inlet 411, and push the impurities cleaned out of the heat exchange tube 2 upward until it enters the collecting chamber 11 through the discharge port 421. As the sleeve 1 41 and the sleeve 2 42 continue to move downward, the liquid inlet 411 is in a fully open state, and the discharge port 421 completely enters the discharge chamber 12. The cleaning rod 43 will no longer fit the inner wall of the heat exchange tube 2 under the action of the torsion spring, and normal waste liquid treatment can be carried out again at this time.

[0039] Among them, the partition 31 includes a filter plate 311 for filtering impurities. The liquid and impurities entering the collection chamber 11 will be filtered by the filter plate 311, and the impurities will be retained on the upper part of the filter plate 311. The liquid after filtering the impurities will enter the discharge chamber 12 and can flow back to the distillation tower 7.

[0040] Furthermore, during normal waste liquid treatment, the cleaning rod 43 does not adhere to the inner wall of the heat exchange tube 2, which can improve the heat exchange efficiency between the waste liquid and the superheated steam.

[0041] In addition, if Figure 2As shown, there are two groups of cleaning components, and the two groups of cleaning components are arranged in parallel in the shell 1. Each group of cleaning components is respectively provided with a driving component 1 and a driving component 2. It can be understood that the sum of the sleeves 1 41 and the sum of the sleeves 2 42 in the two groups of cleaning components are the same as the number of heat exchange tubes 2. When the cleaning rod 43 in one group of cleaning components rotates to clean the inner wall of the heat exchange tube 2, the driving component 1 corresponding to the other group of cleaning components can be started to operate at the same time, and the sleeves 1 41 and the sleeves 2 42 connected thereto can be driven to move upward. The two groups of cleaning components are used to operate alternately, which can ensure the normal and uninterrupted operation of the waste liquid treatment and is convenient to use.

[0042] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A BDO waste liquid treatment device, comprising a shell and a plurality of heat exchange tubes arranged in the shell, characterized in that: The heat exchanger also includes three partitions, a cleaning assembly, a driving assembly 1 and a driving assembly 2. The three partitions are fixedly installed in the shell and arranged in the up-down direction. The three partitions divide the internal space of the shell into a collecting chamber, a drainage chamber, a heat exchange chamber and a liquid inlet chamber from top to bottom. The upper end of the heat exchange tube is connected to the drainage chamber, and the lower end is connected to the liquid inlet chamber. The cleaning assembly includes a sleeve 1, a sleeve 2 and a cleaning rod. The sleeve 1 is rotatably installed at the bottom end of the heat exchange tube and can move up and down. The outer peripheral side of the sleeve 1 is provided with a liquid inlet. The sleeve 2 is rotatable. It is installed at the top of the heat exchange tube and is connected to the uppermost partition by sliding up and down. A drain port is provided on the outer peripheral side of the sleeve two, and when the sleeve two moves upward until the drain port completely enters the collecting chamber, the liquid inlet can also be connected to the liquid inlet chamber. The cleaning rod is arranged in the heat exchange tube and can fit with the inner wall of the heat exchange tube. The upper end of the cleaning rod is connected to the sleeve two, and the lower end is connected to the sleeve one. The driving component one can drive the sleeve one and the sleeve two to rise and fall, and the driving component two can drive the sleeve two and the cleaning rod connected to the sleeve two to rotate.

2. The BDO waste liquid treatment device according to claim 1, characterized in that: The lower end of the cleaning rod is hinged with a rotating rod, and the lower end of the rotating rod is hinged with sleeve one. A sealing plate is connected to the inner side of sleeve two for sliding up and down movement. The sealing plate can rotate synchronously with sleeve two. The upper end of the cleaning rod is hinged with the sealing plate. The hinge points of the cleaning rod and the sealing plate and the hinge points of the rotating rod and the sleeve one are respectively located on both sides of the heat exchange tube. A torsion spring is provided at the hinge of the rotating rod and the cleaning rod. The force applied by the torsion spring to the cleaning rod is away from the side where the hinge point of the cleaning rod and the sealing plate is located.

3. The BDO waste liquid treatment device according to claim 2, characterized in that: A push rod corresponding to the upper and lower parts of the sealing plate is arranged in the collecting chamber, and an elastic member is arranged at the push rod, and the elastic member can apply a downward elastic force to the push rod.

4. The BDO waste liquid treatment device according to claim 1, characterized in that: The driving component 1 comprises a supporting plate 1 and a driving member 1, wherein the supporting plate 1 is arranged at the bottom of the liquid inlet cavity, the sleeve 1 is rotatably connected to the supporting plate 1, and the driving member 1 can drive the supporting plate 1 to rise and fall.

5. The BDO waste liquid treatment device according to claim 1, characterized in that: Driving component 2 includes supporting plate 2, a gear ring, gear 1 and driving member 2. Support plate 2 is arranged at the bottom of the collecting chamber and can be raised and lowered synchronously with sleeve 2. The gear ring is fixedly installed at the upper end of sleeve 2. Gear 1 is rotatably installed on supporting plate 2 and meshes with the gear ring. Driving member 2 can drive gear 1 to rotate.

6. The BDO waste liquid treatment device according to claim 1, characterized in that: A plurality of baffles arranged in the up-down direction are arranged in the heat exchange chamber, and the plurality of baffles are staggered to form an S-shaped channel in the heat exchange chamber.

7. The BDO waste liquid treatment device according to claim 1, characterized in that: There are two sets of cleaning components.

8. The BDO waste liquid treatment device according to claim 1, characterized in that: The uppermost partition plate includes a filter plate for filtering impurities in the waste liquid.

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