Polymer waste liquid recovery system and purification process for polytetramethylene ether glycol

Abstract

The invention discloses a polymer waste liquid recovery system and purification process for polytetramethylene ether glycol, the polymer waste liquid recovery system comprises two groups of shells, the shells are connected with a treatment part, and the treatment part comprises: a feed pipe fixedly connected to the upper end of the side surface of the shell; the filter cartridge is fixedly connected to the inner side of the shell; and the guiding-out piece is installed on the shell and used for guiding out solid impurities in the filter cartridge, and the guiding-out piece comprises a guiding-out pipe fixedly connected to the bottom of the shell. According to the high polymer waste liquid recovery system for polytetramethylene ether glycol and the purification process, an eduction pipe, an adjusting column, an auger, a guide pipe, a cross shaft, a first hydraulic cylinder, a motor, a bevel gear assembly, a sleeve, a first butt joint shell, a branch pipe, a second butt joint shell, a discharging pipe, an air cylinder, a bearing barrel, a sliding rod and a filter element are matched with one another; and the solid impurities retained at the waste liquid solid filtering end are guided out.

Description

Technical Field

[0001] This invention relates to the field of polymer waste liquid recovery technology for polytetramethylene ether glycol, specifically to a polymer waste liquid recovery system and purification process for polytetramethylene ether glycol. Background Technology

[0002] When recovering polytetramethylene ether glycol (PTG) polymer waste liquid, a corresponding recovery system and purification process are required to treat the waste liquid. Referring to the patented announcement CN212818206U, a distillation column for separating and recovering acetone from acetone hydrolysis waste liquid includes a column body and a separation device. The bottom of the large-diameter section of the column body is equipped with a discharge pipe, the side wall with a feed pipe, and the top of the small-diameter section with an exhaust pipe. This effectively avoids the pressure drop increase caused by the adhesion of polymers such as pyrazoline and ketone polymers. As described in the aforementioned patent, existing PTG polymer waste liquid recovery systems often require interruption after a certain operating time to remove and replace solid impurities retained at the solid filtration end and the purification adsorption end filter element. Furthermore, the impurity removal and filter element replacement steps are relatively complex, thus affecting the purification and recovery efficiency of PTG polymer waste liquid. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a polymer waste liquid recovery system and purification process for polytetramethylene ether glycol, solving problems such as the need to interrupt system operation to remove impurities and replace filter cartridges, which affects system efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a polymer waste liquid recovery system for polytetramethylene ether glycol includes two sets of shells, each shell being connected to a processing unit for the recovery and purification of polytetramethylene ether glycol polymer waste liquid, the processing unit comprising: The feed pipe is fixedly connected to the upper side of the shell for introducing waste liquid; The filter cartridge is fixedly connected to the inside of the housing for filtering solid impurities in waste liquid; An export component, installed on the housing, is used to export solid impurities from inside the filter cartridge. The export component includes an export tube fixedly connected to the bottom of the housing and the bottom of the filter cartridge. An adjusting column is snapped onto the top of the export tube. An auger is coaxially fixedly connected to the bottom of the adjusting column near the inner side of the export tube. A cross shaft is coaxially fixedly connected to the top of the adjusting column. A first hydraulic cylinder for adjusting the height of the cross shaft is fixedly connected to the top of the outer side of the housing. A conduit is fixedly connected and communicated to the lower side of the housing near the outer end of the filter cartridge. Two sets of conduits are fixedly connected to a first three-way valve. A drive component for driving the cross shaft to rotate is installed on the upper side of the housing. Purification component, installed below the first three-way valve, is used for waste liquid purification treatment; Adjustment components, mounted on the housing, are used for cleaning and drying adjustments inside the housing.

[0005] Preferably, the filter cartridge is frustum-shaped and has several filter holes on its surface, the bottom of the adjusting column is provided with a sealing gasket, the bottom extension end of the first hydraulic cylinder is fixedly connected to an anti-detachment block that is rotatably connected to the top of the inside of the cross shaft, and the end of the guide tube near the housing is fixedly connected to a first solenoid valve.

[0006] Preferably, the driving component includes a sleeve rotatably connected to the middle of the top of the housing, a bevel gear assembly connected to the sleeve near the upper side of the housing, a motor for driving the bevel gear assembly fixedly connected to the outside of the housing, the output end of the motor being coaxially and fixedly connected to the driving bevel gear inside the bevel gear assembly, and the driven bevel gear inside the bevel gear assembly being coaxially and fixedly connected to the sleeve.

[0007] Preferably, the purification component includes a second three-way valve fixedly connected to the lower side of the first three-way valve. A set of branch pipes are fixedly connected to both sides of the second three-way valve. A first docking shell is fixedly connected to the top of the branch pipe. A support frame is fixedly connected to the outer sides of the two sets of first docking shells. Two sets of second docking shells are fixedly connected to the lower sides of the support frame corresponding to the two sets of first docking shells. A set of feed pipes is fixedly connected and communicated to the bottom of the two sets of second docking shells. A third three-way valve is fixedly connected to the bottom of the third three-way valve. A crystallization kettle for waste liquid crystallization purification is fixedly connected to the bottom of the third three-way valve. Two sets of adsorption components for waste liquid adsorption purification are installed on both sides of the support frame.

[0008] Preferably, the adsorption element includes a cylinder fixedly connected to the side of the support frame. A receiving cylinder, matching the first docking shell and the second docking shell respectively, is fixedly connected to the extended side of the cylinder. A sliding rod, slidably connected to the outside of the receiving cylinder, is fixedly connected to the support frame. A filter element made of activated carbon, used for adsorbing impurities in waste liquid, is snapped into the inside of the receiving cylinder. A set of blocking elements is installed on the upper and lower sides of the receiving cylinder. The blocking elements include a second hydraulic cylinder fixedly connected to the upper and lower ends of the outside of the receiving cylinder respectively. A connecting block, slidably connected to the interlayer end of the receiving cylinder, is fixedly connected to the upper end of the second hydraulic cylinder. Two sets of docking rings, slidably connected to the receiving cylinder, are fixedly connected to the end of the connecting block away from the second hydraulic cylinder. A set of docking grooves matching the docking rings is provided on the lower side of the first docking shell and the upper side of the second docking shell respectively.

[0009] Preferably, the adjusting component includes a water pump and an air pump fixedly connected to the top of the housing. The water pump's water intake end is fixedly connected to a water intake pipe, and the water pump's drain end is fixedly connected to a water supply pipe. The air pump's air intake end is fixedly connected to a condenser. A fourth three-way valve is fixedly connected between the water supply pipe and the condenser. A connecting plate is fixedly connected to the top of the housing. The connecting plate is hollow inside and has several connecting holes at the bottom. A second solenoid valve is fixedly connected to the upper end of the connecting plate. A connecting pipe fixedly connected to the second solenoid valve is fixedly connected to the bottom of the fourth three-way valve. A resistance heating wire for heating is provided in the interlayer of the inner wall of the housing.

[0010] This invention also discloses a purification process for a polytetramethylene ether glycol (PTE) polymer waste liquid recovery system, specifically including the following steps: Step 1: The user introduces the waste liquid to be treated into the housing through a set of feed pipes, allowing the filter cartridge to filter the solid impurities in the waste liquid. The filtered waste liquid is then introduced into the purification unit through the conduit and the first three-way valve. The waste liquid with filtered solid impurities is then introduced into the receiving cylinder through the second three-way valve, the branch pipe, and the first docking shell. The filter element in the receiving cylinder adsorbs trace impurities such as pigments and metal ions in the waste liquid. The waste liquid after adsorption is introduced into the crystallization kettle through the second docking shell, the discharge pipe, and the third three-way valve for crystallization and purification. When it is necessary to remove the solid impurities retained in the filter cartridge, stop injecting waste liquid into the original housing, reverse the first three-way valve, and inject the waste liquid into another set of feed pipes to repeat the above filtration and purification operation. Step 2: Adjust the height of the cross shaft, adjusting column, and auger through the first hydraulic cylinder. The auger extends into the bottom of the filter cartridge. The motor drives the sleeve to rotate through the bevel gear assembly. The rotating sleeve drives the cross shaft, adjusting column, and auger to rotate through the cross groove. The rotating auger guides the impurities retained at the bottom of the filter cartridge to the external impurity recovery end through the outlet pipe. The water pump draws external water from the external water source through the external water pipe. Then, the water flows through the water pipe, the fourth three-way valve, the connecting pipe, the second solenoid valve, and the connecting plate to flush the inner wall of the housing and the inner surface of the filter cartridge, promoting the shedding of solid impurities retained on the inner wall of the filter cartridge. Step 3: When the filter element needs to be replaced, reverse the second three-way valve and the third three-way valve. At this time, the waste liquid is introduced into another set of first docking shell, receiving cylinder and second docking shell through another set of branch pipes. The filter element in the other set of receiving cylinders adsorbs and purifies the waste liquid. The two sets of second hydraulic cylinders on the original receiving cylinder adjust the height of the two sets of connecting blocks and docking rings respectively, so that the two sets of docking rings are separated from the first docking shell and the second docking shell respectively. Adjust the horizontal position of the receiving cylinder, filter element and barrier component by the cylinder, replace the filter element stuck in the receiving cylinder, and then reset each link.

[0011] Preferably, in step two, after the inner wall of the filter cartridge is rinsed, the water pump is turned off, the fourth three-way valve is reversed, the inside of the shell is heated by the resistance wire, and the air pump and condenser are turned on. The heated shell promotes the evaporation of moisture inside, and the water vapor is introduced into the condenser along with the gas through the connecting plate, the second solenoid valve, the connecting pipe, and the fourth three-way valve. The condenser promotes the liquefaction of water vapor.

[0012] This invention provides a system and purification process for recovering polymer waste liquid from polytetramethylene ether glycol. Compared with existing technologies, it has the following advantages: (1) The polymer waste liquid recovery system and purification process for polytetramethylene ether glycol is designed by setting an outlet and a purification component in the system, allowing the first three-way valve, the second three-way valve, and the third three-way valve to cooperate with each other to switch the flow direction of the waste liquid to be treated. This facilitates the cooperation of the outlet pipe, regulating column, auger, guide tube, cross shaft, first hydraulic cylinder, motor, bevel gear assembly, sleeve, first docking shell, branch pipe, second docking shell, discharge pipe, cylinder, receiving cylinder, slide rod, and filter element to export the solid impurities retained at the solid filtration end of the waste liquid. It has the function of adsorbing pigments and metal ions in the waste liquid and the function of replacing the filter element. The device does not need to be interrupted when cleaning the outlet and exporting the filter end or replacing the filter element, thus improving the efficiency of the device.

[0013] (2) The polymer waste liquid recovery system and purification process for polytetramethylene ether glycol is designed by setting up a barrier in the system. After the first docking shell, the second docking shell and the receiving cylinder are aligned, the vertical height of the connecting block and the docking ring is adjusted by the second hydraulic cylinder so that the four sets of docking rings are respectively docked with the docking groove and the outer wall of the first docking shell and the second docking shell, which plays a sealing role and prevents the waste liquid from leaking during the adsorption and purification process.

[0014] (3) The polymer waste liquid recovery system and purification process for polytetramethylene ether glycol is designed with an adjusting component in the system. During the process of removing solid impurities retained in the filter cartridge, the water pump draws water from the outside through the water pipe. The water flows through the water pipe, the fourth three-way valve, the connecting pipe, the second solenoid valve, and the connecting plate to flush the inner wall of the shell and the inner surface of the filter cartridge, promoting the shedding of solid impurities retained in the inner wall of the filter cartridge and improving the solid removal efficiency. After the inner wall of the filter cartridge is flushed, the water pump is turned off and the fourth three-way valve is reversed. The heating wire heats the inside of the shell and turns on the air pump and condenser. The heating of the shell promotes the evaporation of water inside. The water vapor is introduced into the condenser along with the gas through the connecting plate, the second solenoid valve, the connecting pipe, and the fourth three-way valve. The condenser promotes the liquefaction of water vapor, realizing the removal of water retained in the shell and reducing the impact on the subsequent purification and recovery of polytetramethylene ether glycol. Attached Figure Description

[0015] Figure 1This is an enlarged cross-sectional view of the present invention; Figure 2 This is an enlarged view of the driving component of the present invention; Figure 3 This is a partial enlarged cross-sectional view of the purified component of the present invention; Figure 4 This is an enlarged view of the barrier element of the present invention; Figure 5 This is an enlarged view of the adjusting component of the present invention; Figure 6 This is an enlarged view of the present invention.

[0016] In the diagram: 1. Shell; 2. Feed pipe; 3. Filter cartridge; 4. Outlet component; 41. Outlet pipe; 42. Adjusting column; 43. Screwdriver; 44. Guide tube; 45. First three-way valve; 46. Cross shaft; 47. First hydraulic cylinder; 48. Drive component; 481. Motor; 482. Bevel gear assembly; 483. Sleeve; 5. Purification component; 51. Support frame; 52. First docking shell; 53. Branch pipe; 54. Second three-way valve; 55. Second docking shell 56. Feed pipe; 57. Third three-way valve; 58. Crystallization kettle; 59. Adsorption component; 591. Cylinder; 592. Receiving cylinder; 593. Slide rod; 594. Filter element; 595. Barrier component; 5951. Second hydraulic cylinder; 5952. Connecting block; 5953. Connecting ring; 6. Adjusting component; 61. Water pump; 62. Water pipe; 63. Fourth three-way valve; 64. Connecting pipe; 65. Connecting plate; 66. Condenser; 67. Air pump. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] refer to Figure 1-6 This invention provides the following three technical methods: The first embodiment: a polymer waste liquid recovery system and purification process for polytetramethylene ether glycol includes two sets of shells 1. The shells 1 are connected to a processing component for the recovery and purification of polytetramethylene ether glycol polymer waste liquid. The processing component includes: a feed pipe 2, which is fixedly connected to the upper side of the shell 1 for introducing waste liquid; and a filter cartridge 3, which is fixedly connected to the inside of the shell 1 for filtering solid impurities in the waste liquid. The outlet component 4 is installed on the housing 1 for exporting solid impurities from the filter cartridge 3. The outlet component 4 includes an outlet pipe 41 fixedly connected to the bottom of the housing 1 and the bottom of the filter cartridge 3. An adjusting column 42 is snapped onto the top of the outlet pipe 41. An auger 43 is coaxially fixedly connected to the bottom of the adjusting column 42 near the inner side of the outlet pipe 41. A cross shaft 46 is coaxially fixedly connected to the top of the adjusting column 42. A first hydraulic cylinder 47 for adjusting the height of the cross shaft 46 is fixedly connected to the top of the outer side of the housing 1. A conduit 44 is fixedly connected and communicated to the lower side of the housing 1 near the outer end of the filter cartridge 3. Two sets of conduits 44 are fixedly connected to a first three-way valve 45. A drive component 48 for driving the cross shaft 46 to rotate is installed on the upper side of the housing 1. Purification component 5 is installed below the first three-way valve 45 for waste liquid purification treatment; adjustment component 6 is installed on the housing 1 for internal cleaning and drying adjustment of the housing 1; filter cartridge 3 is frustoconical and has several filter holes on its surface; the bottom of adjustment column 42 is provided with a sealing gasket; the bottom extension end of the first hydraulic cylinder 47 is fixedly connected to an anti-detachment block that is rotatably connected to the top of the cross shaft 46; the end of the conduit 44 near the housing 1 is fixedly connected to a first solenoid valve; drive component 48 includes a sleeve 483 rotatably connected to the middle of the top of the housing 1; a bevel gear assembly 482 is connected to the sleeve 483 near the upper side of the housing 1; a motor 481 for driving the bevel gear assembly 482 is fixedly connected to the outside of the housing 1; the output end of the motor 481 is coaxially fixedly connected to the driving bevel gear in the bevel gear assembly 482; and the driven bevel gear in the bevel gear assembly 482 is coaxially fixedly connected to the sleeve 483. The purification component 5 includes a second three-way valve 54 fixedly connected to the lower side of the first three-way valve 45. A set of branch pipes 53 are fixedly connected to both sides of the second three-way valve 54. A first docking shell 52 is fixedly connected to the top of the branch pipes 53. A support frame 51 is fixedly connected to the outer side of the two sets of first docking shells 52. Two sets of second docking shells 55 are fixedly connected to the lower side of the support frame 51 corresponding to the two sets of first docking shells 52. A set of feed pipes 56 is fixedly connected and communicated to the bottom of the two sets of second docking shells 55. A third three-way valve 57 is fixedly connected to the two sets of feed pipes 56. A crystallization kettle 58 for waste liquid crystallization purification is fixedly connected to the bottom of the third three-way valve 57. Two sets of adsorption components 59 for waste liquid adsorption purification are installed on both sides of the support frame 51. The adsorption component 59 includes a cylinder 591 fixedly connected to the side of the support frame 51. A receiving cylinder 592, matching the first docking shell 52 and the second docking shell 55 respectively, is fixedly connected to the extended side of the cylinder 591. A slide rod 593, slidably connected to the outside of the receiving cylinder 592, is fixedly connected to the support frame 51. A filter element 594, made of activated carbon and used for adsorbing impurities in waste liquid, is snapped inside the receiving cylinder 592. A set of blocking components 595 are installed on the upper and lower sides of the receiving cylinder 592 respectively. The upper side of the filter element 594 is provided with a connection to the receiving cylinder 592; allowing the first three-way valve 45, the second three-way valve 54, and the third three-way valve to pass through. The valves 57 work together to switch the flow direction of the waste liquid to be treated, thereby facilitating the cooperation of the outlet pipe 41, adjusting column 42, auger 43, guide pipe 44, cross shaft 46, first hydraulic cylinder 47, motor 481, bevel gear assembly 482, sleeve 483, first docking shell 52, branch pipe 53, second docking shell 55, discharge pipe 56, cylinder 591, receiving cylinder 592, slide rod 593, and filter element 594 to remove solid impurities retained at the solid filtration end of the waste liquid. It also has the function of adsorbing pigments and metal ions in the waste liquid and the function of replacing the filter element 594. The main difference between the second implementation method and the first implementation method is that: The barrier 595 includes a second hydraulic cylinder 5951 fixedly connected to the upper and lower ends of the outer side of the receiving cylinder 592. A connecting block 5952 is fixedly connected to the upper end of the second hydraulic cylinder 5951 and slidably connected to the interlayer end of the receiving cylinder 592. Two sets of docking rings 5953 are fixedly connected to the end of the connecting block 5952 away from the second hydraulic cylinder 5951 and slidably connected to the receiving cylinder 592. A set of docking grooves matching the docking rings 5953 are respectively provided on the lower side of the first docking shell 52 and the upper side of the second docking shell 55. The inner wall of the other set of docking rings 5953 is flush with the outer side of the receiving cylinder 592, the first docking shell 52, and the second docking shell 55. After the first docking shell 52 and the second docking shell 55 are aligned with the receiving cylinder 592, the vertical height of the connecting block 5952 and the docking rings 5953 is adjusted by the second hydraulic cylinder 5951 so that the four sets of docking rings 5953 are respectively docked with the docking grooves and outer walls of the first docking shell 52 and the second docking shell 55, thereby achieving a sealing effect. The main difference between the third and second implementation methods is that: Adjusting component 6 includes a water pump 61 and an air pump 67 fixedly connected to the top of housing 1. The water pump 61 has a water intake pipe fixedly connected to its intake end and a water pipe 62 fixedly connected to its discharge end. The air pump 67 has a condenser 66 fixedly connected to its exhaust end. A fourth three-way valve 63 is fixedly connected between the water pipe 62 and the condenser 66. A connecting plate 65 is fixedly connected to the top of the interior of housing 1. The connecting plate 65 is hollow and has several connecting holes at its bottom. A second solenoid valve is fixedly connected to the upper end of the connecting plate 65. A connecting pipe 64, which is fixedly connected to the second solenoid valve, is fixedly connected to the bottom of the fourth three-way valve 63. A heating resistor is provided in the inner wall interlayer of housing 1. A heating element and a water pump 61 draw water from an external source through a water pipe. The water flows through a water pipe 62, a fourth three-way valve 63, a connecting pipe 64, a second solenoid valve, and a connecting plate 65 to flush the inner wall of the housing 1 and the inner surface of the filter cartridge 3, promoting the removal of solid impurities retained on the inner wall of the filter cartridge 3. After the inner wall of the filter cartridge 3 is flushed, the water pump 61 is turned off, and the fourth three-way valve 63 is reversed. The heating element heats the inside of the housing 1 and turns on the air pump 67 and the condenser 66. The heating of the housing 1 promotes the evaporation of moisture inside it, and the water vapor is introduced into the condenser 66 along with the gas through the connecting plate 65, the second solenoid valve, the connecting pipe 64, and the fourth three-way valve 63. The condenser 66 promotes the liquefaction of the water vapor.

[0019] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0020] Step 1: The user feeds the polytetramethylene ether glycol (PTE) waste liquid into the housing 1 via an external feeding device and a set of feed pipes 2. The filter cartridge 3 in the housing 1 filters the solid impurities in the waste liquid. The filtered waste liquid then flows through conduit 44 and the first three-way valve 45 into the purification unit 5. The waste liquid containing the filtered solid impurities then flows through the second three-way valve 54, branch pipe 53, and the first docking shell 52 into the receiving cylinder 592. Inside the receiving cylinder 592, a filter element 594 made of activated carbon filters the pigments and metal ions in the waste liquid. Trace impurities such as particles are adsorbed. The waste liquid is introduced into the crystallization kettle 58 through the second docking shell 55, the feed pipe 56, and the third three-way valve 57. The waste liquid is crystallized and purified in the crystallization kettle 58. This is the existing technology, so the specific internal structure and working principle of the crystallization kettle 58 will not be described in detail. When it is necessary to remove the solid impurities retained in the filter cartridge 3, stop injecting waste liquid into the original shell 1, and let the first three-way valve 45 switch so that the waste liquid is injected into another set of feed pipes 2 and the above filtration and purification operation is repeated. Step 2: Adjust the height of the cross shaft 46, adjusting column 42, and auger 43 using the first hydraulic cylinder 47. The cross shaft 46 slides along the cross groove inside the sleeve 483, the bottom of the adjusting column 42 disengages from the top of the outlet pipe 41, and the auger 43 extends into the bottom of the filter cartridge 3 and contacts the solid impurities retained inside. Position the auger 43 appropriately, and start the motor 481. The motor 481 drives the sleeve 483 to rotate via the bevel gear assembly 482. The rotation of the sleeve 483 drives the cross shaft 46, adjusting column 42, and auger 43 through the cross groove. The shaft 46, adjusting column 42, and auger 43 rotate. Rotating the auger 43 guides the impurities retained at the bottom of the filter cartridge 3 through the outlet pipe 41 to the external impurity recovery end. The second solenoid valve and water pump 61 are turned on. The water pump 61 draws external water from the external water source through the external water pipe. Then, the water flows through the water pipe 62, the fourth three-way valve 63, the connecting pipe 64, the second solenoid valve, and the connecting plate 65 to flush the inner wall of the housing 1 and the inner surface of the filter cartridge 3, promoting the removal of solid impurities retained on the inner wall of the filter cartridge 3. After the treatment is completed, the water pump 61 is turned off. Step 3: When the filter element 594 needs to be replaced, reverse the second three-way valve 54 and the third three-way valve 57. At this time, the waste liquid is introduced into another set of first docking shell 52, receiving cylinder 592 and second docking shell 55 through another set of branch pipes 53. The filter element 594 in the other set of receiving cylinders 592 adsorbs and purifies the waste liquid. The two sets of second hydraulic cylinders 5951 on the original receiving cylinder 592 adjust the height of the two sets of connecting blocks 5952 and docking rings 5953 respectively, so that the two sets of docking rings 5953 are separated from the first docking shell 52 and the second docking shell 55 respectively. Adjust the horizontal position of the receiving cylinder 592, filter element 594 and barrier 595 by the cylinder 591. The outside of the receiving cylinder 592 slides along the slide rod 593. After the receiving cylinder 592 is fully unfolded, replace the filter element 594 stuck in the receiving cylinder 592, and then reset each link.

[0021] In step two, after the inner wall of the filter cartridge 3 is rinsed, the water pump 61 is turned off, the fourth three-way valve 63 is reversed, the heating wire heats the inside of the housing 1 and the vacuum pump 67 and condenser 66 are turned on. Heating the housing 1 promotes the evaporation of moisture inside it, and the water vapor is introduced into the condenser 66 along with the gas through the connecting plate 65, the second solenoid valve, the connecting pipe 64, and the fourth three-way valve 63. The condenser 66 promotes the liquefaction of water vapor.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polymer waste liquid recovery system for polytetramethylene ether glycol, comprising two sets of shells (1), characterized in that: The housing (1) is connected to a processing unit for the recovery and purification of polytetramethylene ether glycol polymer waste liquid, the processing unit comprising: The feed pipe (2) is fixedly connected to the upper side of the shell (1) for waste liquid introduction; The filter cartridge (3) is fixedly connected to the inside of the housing (1) for filtering solid impurities in waste liquid; The outlet component (4) is installed on the housing (1) for exporting solid impurities from the filter cartridge (3). The outlet component (4) includes an outlet pipe (41) fixedly connected to the bottom of the housing (1) and the bottom of the filter cartridge (3). An adjusting column (42) is snapped onto the top of the outlet pipe (41). An auger (43) is coaxially fixedly connected to the bottom of the adjusting column (42) near the inner side of the outlet pipe (41). A cross shaft (46) is coaxially fixedly connected to the top of the adjusting column (42). A first hydraulic cylinder (47) for adjusting the height of the cross shaft (46) is fixedly connected to the top of the outer side of the housing (1). A conduit (44) is fixedly connected and communicated to the lower side of the housing (1) near the outer end of the filter cartridge (3). Two sets of conduits (44) are fixedly connected to a first three-way valve (45). A drive component (48) for driving the cross shaft (46) to rotate is installed on the upper side of the housing (1). Purification component (5) is installed below the first three-way valve (45) for waste liquid purification treatment; Adjustment component (6) is installed on housing (1) for cleaning and drying adjustment inside housing (1).

2. The polymer waste liquid recovery system for polytetramethylene ether diol according to claim 1, characterized in that: The filter cartridge (3) is frustum-shaped and has several filter holes on its surface. The bottom of the adjusting column (42) is provided with a sealing gasket. The bottom extension end of the first hydraulic cylinder (47) is fixedly connected to an anti-detachment block that is rotatably connected to the top of the cross shaft (46). The end of the guide tube (44) near the housing (1) is fixedly connected to a first solenoid valve.

3. The polymer waste liquid recovery system for polytetramethylene ether diol according to claim 2, characterized in that: The drive unit (48) includes a sleeve (483) rotatably connected to the middle of the top of the housing (1). A bevel gear assembly (482) is connected to the upper side of the sleeve (483) near the housing (1). A motor (481) for driving the bevel gear assembly (482) is fixedly connected to the outside of the housing (1). The output end of the motor (481) is coaxially fixedly connected to the driving bevel gear in the bevel gear assembly (482). The driven bevel gear in the bevel gear assembly (482) is coaxially fixedly connected to the sleeve (483).

4. The polymer waste liquid recovery system for polytetramethylene ether diol according to claim 3, characterized in that: The purification component (5) includes a second three-way valve (54) fixedly connected to the lower side of the first three-way valve (45). A set of branch pipes (53) are fixedly connected to both sides of the second three-way valve (54). A first docking shell (52) is fixedly connected to the top of the branch pipe (53). A support frame (51) is fixedly connected to the outer side of the two sets of first docking shells (52). Two sets of second docking shells (55) are fixedly connected to the lower side of the two sets of first docking shells (52). A set of feed pipes (56) is fixedly connected and communicated to the bottom of the two sets of second docking shells (55). A third three-way valve (57) is fixedly connected to the bottom of the third three-way valve (57). A crystallization kettle (58) for waste liquid crystallization purification is fixedly connected to the bottom of the third three-way valve (57). Two sets of adsorption components (59) for waste liquid adsorption purification are installed on both sides of the support frame (51).

5. The polymer waste liquid recovery system for polytetramethylene ether diol according to claim 4, characterized in that: The adsorption element (59) includes a cylinder (591) fixedly connected to the side of the support frame (51). A receiving cylinder (592) matching the first docking shell (52) and the second docking shell (55) is fixedly connected to the extended side of the cylinder (591). A slide rod (593) slidably connected to the outside of the receiving cylinder (592) is fixedly connected to the support frame (51). A filter element (594) made of activated carbon for adsorbing impurities in waste liquid is snapped inside the receiving cylinder (592). A set of barrier elements (595) is installed on the upper and lower sides of the receiving cylinder (592). The barrier (595) includes a second hydraulic cylinder (5951) fixedly connected to the upper and lower ends of the outer side of the receiving cylinder (592). The upper end of the second hydraulic cylinder (5951) is fixedly connected to a connecting block (5952) which is slidably connected to the interlayer end of the receiving cylinder (592). The end of the connecting block (5952) away from the second hydraulic cylinder (5951) is fixedly connected to two sets of docking rings (5953) which are slidably connected to the receiving cylinder (592). The lower side of the first docking shell (52) and the upper side of the second docking shell (55) are respectively provided with a set of docking grooves that match the docking rings (5953).

6. The polymer waste liquid recovery system for polytetramethylene ether diol according to claim 5, characterized in that: The regulating component (6) includes a water pump (61) and an air pump (67) fixedly connected to the top of the housing (1). The water pump (61) has a water pump pipe fixedly connected to its water pump end and a water pipe (62) fixedly connected to its water pump drain end. The air pump (67) has a condenser (66) fixedly connected to its air pump end. A fourth three-way valve (63) is fixedly connected between the water pipe (62) and the condenser (66). A connecting plate (65) is fixedly connected to the top of the housing (1). The connecting plate (65) is hollow inside and has several connecting holes at the bottom. A second solenoid valve is fixedly connected to the upper end of the connecting plate (65). A connecting pipe (64) fixedly connected to the second solenoid valve is fixedly connected to the bottom of the fourth three-way valve (63). A heating resistance heating wire is provided in the inner wall interlayer of the housing (1).

7. The purification process for the polytetramethylene ether glycol polymer waste liquid recovery system according to claim 6, characterized in that: Specifically, the following steps are included: Step 1: The user introduces the waste liquid to be treated into the housing (1) through a set of feed pipes (2), so that the filter cartridge (3) filters the solid impurities in the waste liquid. The filtered waste liquid is introduced into the purification component (5) through the conduit (44) and the first three-way valve (45). The waste liquid with filtered solid impurities is introduced into the receiving cylinder (592) through the second three-way valve (54), the branch pipe (53), and the first docking shell (52). The filter element (594) in the receiving cylinder (592) adsorbs the pigments, metal ions and other trace impurities in the waste liquid. The waste liquid after adsorption is introduced into the crystallization kettle (58) through the second docking shell (55), the discharge pipe (56), and the third three-way valve (57) for crystallization purification. When it is necessary to remove the solid impurities retained in the filter cartridge (3), stop injecting waste liquid into the original housing (1), and let the first three-way valve (45) switch to inject the waste liquid into another set of feed pipes (2) through another set of feed pipes (2) to repeat the above filtration and purification operation. Step 2: Adjust the height of the cross shaft (46), adjusting column (42), and auger (43) through the first hydraulic cylinder (47). The auger (43) is inserted into the bottom of the filter cartridge (3). The motor (481) drives the sleeve (483) to rotate through the bevel gear assembly (482). The rotating sleeve (483) drives the cross shaft (46), adjusting column (42), and auger (43) to rotate through the cross groove. The rotating auger (43) guides the impurities retained at the bottom of the filter cartridge (3) to the external impurity recovery end through the outlet pipe (41). The water pump (61) draws external water through the external water pipe. Then the water flows through the water pipe (62), the fourth three-way valve (63), the connecting pipe (64), the second solenoid valve, and the connecting plate (65) to flush the inner wall of the housing (1) and the inner surface of the filter cartridge (3), promoting the shedding of solid impurities retained on the inner wall of the filter cartridge (3). Step 3: When the filter element (594) needs to be replaced, switch the second three-way valve (54) and the third three-way valve (57). At this time, the waste liquid is introduced into another set of first docking shells (52), receiving cylinders (592) and second docking shells (55) through another set of branch pipes (53). The filter element (594) in the other set of receiving cylinders (592) adsorbs and purifies the waste liquid. The two sets of second hydraulic cylinders (5951) on the original receiving cylinder (592) adjust the height of the two sets of connecting blocks (5952) and docking rings (5953) respectively, so that the two sets of docking rings (5953) are separated from the first docking shell (52) and the second docking shell (55) respectively. Adjust the horizontal position of the receiving cylinder (592), filter element (594) and barrier (595) through the cylinder (591), replace the filter element (594) stuck in the receiving cylinder (592), and then reset each link.

8. The purification process for the polytetramethylene ether glycol polymer waste liquid recovery system according to claim 7, characterized in that: In step two, after the inner wall of the filter cartridge (3) is rinsed, the water pump (61) is turned off and the fourth three-way valve (63) is switched. The heating wire heats the inside of the shell (1) and the vacuum pump (67) and condenser (66) are turned on. The heating of the shell (1) promotes the evaporation of the water inside. The water vapor is introduced into the condenser (66) along with the gas through the connecting plate (65), the second solenoid valve, the connecting pipe (64), and the fourth three-way valve (63). The condenser (66) promotes the liquefaction of the water vapor.

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