Wastewater treatment equipment for ulinastatin production

Abstract

The invention is suitable for the technical field of wastewater treatment, and provides wastewater treatment equipment for ulinastatin production, the wastewater treatment equipment comprises an upper support plate, a middle support plate and a lower support plate which are sequentially mounted from top to bottom, the adjacent support plates are connected and fixed through a plurality of support columns, and the support columns for supporting are also fixedly mounted at four corners of the bottom of the lower support plate; the pretreatment tank is mounted at the top of the upper supporting plate; the adsorption tank is mounted at the top of the middle supporting plate; the recovery unit is mounted on the lower supporting plate; wherein a wastewater inlet pipe for conveying to-be-treated wastewater into the pretreatment tank is mounted at the top of the pretreatment tank, and a pretreatment unit is arranged in the pretreatment tank. The wastewater treatment equipment for ulinastatin production, provided by the scheme, is high in integration degree, adopts physical demulsification and catalytic oxidation cooperative treatment, is free of chemical pollution, synchronously realizes wastewater purification and salt recovery, and is adaptive to green production requirements.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device based on ulinastatin production. Background Technology

[0002] Ulinastatin, as a drug, is a glycoprotein protease inhibitor extracted from human urine or prepared through genetic engineering.

[0003] Wastewater is inevitably generated during the production of ulinastatin. This wastewater contains suspended solids (SS), emulsified organic matter, high-salt substances, and recalcitrant small-molecule organic matter, as well as recoverable salts and small-molecule peptides. Its complex composition and unique characteristics make it difficult to adapt to conventional treatment equipment. Existing technologies have limitations: filtration treatment is mostly single-stage, and demulsification relies on chemical agents, which can easily lead to secondary pollution.

[0004] Therefore, it is necessary to provide a wastewater treatment device based on ulinastatin production to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a wastewater treatment device based on ulinastatin production, aiming to solve the technical problems of single filtration treatment and reliance on chemical agents for demulsification, which easily leads to secondary pollution.

[0006] This invention is implemented as follows: a wastewater treatment device based on ulinastatin production includes: an upper support plate, a middle support plate, and a lower support plate installed sequentially from top to bottom; adjacent support plates are connected and fixed by multiple pillars, and pillars for support are also fixedly installed at the four corners of the bottom of the lower support plate; a pretreatment tank installed on the top of the upper support plate, an adsorption tank installed on the top of the middle support plate, and a recovery unit installed on the lower support plate; wherein, the top of the pretreatment tank is equipped with a wastewater inlet pipe for conveying the wastewater to be treated into the pretreatment tank, and the pretreatment tank is equipped with a pretreatment unit for treating suspended solids, macromolecular organic matter, emulsified organic matter, etc. in the wastewater; the adsorption tank is equipped with an adsorption catalytic oxidation unit for treating small molecule organic matter, residual emulsified organic matter, high-salt substances, etc. in the wastewater after treatment by the treatment mechanism; the recovery unit is used to recover salt substances in the regenerated waste liquid discharged from the adsorption tank.

[0007] Preferably, the pretreatment unit includes a filter cartridge disposed inside the pretreatment tank and with a filter membrane installed on its outer wall. An upper shaft tube and a lower shaft tube are installed at the top and bottom of the filter cartridge. The upper shaft tube and the lower shaft tube are respectively sealed and rotatably connected to the top and bottom of the pretreatment tank through sealed bearings. The lower shaft tube is connected to the inside of the filter cartridge for discharging the wastewater filtered by the filter cartridge. Several sets of dynamic demulsifying teeth are installed on the outer wall of the filter cartridge, and several sets of static demulsifying teeth are installed on the inner wall of the pretreatment tank. A drive mechanism is also installed at the bottom of the upper support plate for driving the filter cartridge and the dynamic demulsifying teeth to rotate, thereby demulsifying the emulsified organic matter in the wastewater (the rotating dynamic demulsifying teeth cooperate with the static demulsifying teeth to form a shearing force, cutting the emulsified droplets, causing the emulsified organic matter to demulsify and stratify, and be simultaneously intercepted by the filter membrane).

[0008] Preferably, the drive mechanism includes a main motor fixed to the bottom of the upper support plate via a frame, an upper main sprocket fixedly sleeved on the output shaft at the top of the main motor, a first flywheel fixedly sleeved on the lower shaft tube, and the first flywheel and the upper main sprocket connected by a first chain.

[0009] Preferably, the pretreatment tank is equipped with a backwashing mechanism for rinsing the outer wall of the filter cartridge to prevent filter membrane clogging. The backwashing mechanism includes a pump fixedly installed on the top of the upper support plate. The inlet and outlet of the pump are respectively connected to a first three-way valve and a second three-way valve. One port of the first three-way valve is connected to the inside of the pretreatment tank through a first liquid extraction pipe. One port of the second three-way valve is connected to a first delivery pipe. An installation vertical pipe with one end connected to the first delivery pipe and the other end closed is fixedly installed on the inner wall of the pretreatment tank. Several nozzles are installed on the installation vertical pipe, arranged at equal intervals and facing the outer wall of the filter cartridge.

[0010] Preferably, the bottom of the pretreatment tank is equipped with a discharge pipe for discharging concentrated waste liquid containing high concentrations of organic matter, and the top of the discharge pipe is provided with a first plug, and is equipped with an opening and closing mechanism for vertically moving the first plug to open and close the top of the discharge pipe. The opening and closing mechanism includes a first vertical rod, a connecting block and a first electric push rod. The first vertical rod is fixedly installed on the top of the first plug and extends to the top of the pretreatment tank and is vertically slidably connected to the top of the pretreatment tank. The connecting block is fixedly installed on the top of the first vertical rod, and the first electric push rod is fixedly installed on the top of the pretreatment tank and the top of the output rod is fixedly connected to the connecting block.

[0011] Preferably, the top and bottom of the adsorption tank are respectively equipped with an upper connecting pipe and a lower connecting pipe. A stationary sleeve is fixedly connected to the top of the upper connecting pipe, and the bottom of the lower shaft is rotatably connected to the stationary sleeve via a sealed bearing. The adsorption catalytic oxidation unit includes a cylindrical body with transparent sidewalls. Two vertically distributed support mesh plates are installed on the inner wall of the cylindrical body, and a resin bed is disposed between the two support mesh plates. The resin bed is loaded with TiO2 ion exchange resin, and the exchange groups of the ion exchange resin adsorb salt ions such as Na⁺ and Cl⁻ in the wastewater. An upper sleeve and a lower sliding pipe are fixedly installed at the top and bottom of the cylindrical body, respectively. Both are connected to the cylinder body. An upper sliding pipe and a lower sleeve are fixedly installed on the top inner wall and bottom inner wall of the adsorption tank, respectively. The upper sleeve is sealed and fitted on the outer wall of the upper sliding pipe and is vertically slidably connected to the upper sliding pipe. The lower sleeve is sealed and fitted on the lower sliding pipe and is vertically slidably connected to the lower sliding pipe. The upper sliding pipe is connected to the upper connecting pipe, and the lower sleeve is connected to the lower shaft pipe. Springs are slidably fitted on the upper sliding pipe and the lower sliding pipe. A first clean water outlet pipe is installed on the side wall of the lower shaft pipe. Solenoid valves are installed on both the first clean water outlet pipe and the lower shaft pipe. Water treated by the adsorption catalytic oxidation unit is discharged through the first clean water outlet pipe by controlling the valves. Preferably, a number of UV-C ultraviolet lamps are installed on the inner wall of the adsorption tank. The UV-C ultraviolet light irradiates the TiO2 exchange resin, activating it to generate hydroxyl radicals, which strongly oxidize and degrade recalcitrant organic matter (such as organic derivatives and residual emulsified organic matter).

[0012] Preferably, the second support plate is provided with a regenerated liquid tank and equipped with a regenerated liquid conveying mechanism for conveying regenerated liquid to the TiO ion exchange resin on the resin bed. The regenerated liquid conveying mechanism includes a vertical rotating pipe extending into the regenerated liquid tank. An outer sleeve is rotatably fitted onto the vertical rotating pipe through two sealed bearings, and the bottom end of the outer sleeve is fixedly connected to the top of the regenerated liquid tank. An inner cavity is formed between the outer sleeve and the vertical rotating pipe. Several through holes are opened on the outer wall of the section of the vertical rotating pipe inside the outer sleeve. A second liquid extraction pipe is connected to one side of the outer sleeve. One end of the second liquid extraction pipe is connected to the inside of the outer sleeve, and the other end of the second liquid extraction pipe is connected to the other port of the first three-way valve. The other port of the second three-way valve is connected to a second conveying pipe, and the other end of the second output pipe is connected to the upper shaft pipe.

[0013] Preferably, the regenerated liquid tank is also equipped with a linkage stirring mechanism. The linkage mechanism includes several stirring rods fixed on the vertical rotating pipe and located inside the regenerated liquid tank. A fixing frame is fixedly installed on the top of the regenerated liquid tank, and a central shaft is rotatably installed on the fixing frame via bearings. The bottom end of the central shaft is fixedly connected to the top end of the vertical rotating pipe. The main motor is a dual-shaft motor, and a lower main sprocket is fixedly sleeved on the output shaft at the bottom end of the main motor. A second flywheel is fixedly sleeved on the central shaft, and the second flywheel and the lower main sprocket are connected by a sleeved second chain.

[0014] Preferably, the adsorption tank is provided with a linkage vibration mechanism. The linkage mechanism includes a linkage shaft that passes through one side of the adsorption tank and is rotatably connected to the adsorption tank. The linkage shaft is arranged horizontally, and a bevel gear is fixedly sleeved at one end of the linkage shaft and the top of the central shaft. The two bevel gears mesh with each other. A cam is fixedly sleeved at one end of the linkage shaft inside the adsorption tank. A force-receiving wheel is rotatably installed at the top of the cylinder. The cam and the force-receiving wheel are parallel in axis. During the rotation of the cam, the cylinder vibrates up and down, causing the resin to disperse.

[0015] Preferably, the recovery unit includes a membrane distillation tank and a crystallization tank, which are located between a middle support plate and a lower support plate. A hydrophobic microporous membrane is installed inside the membrane distillation tank, supported by a membrane support mesh plate fixed to the inner wall of the tank. This divides the tank into upper and lower spaces: an upper chamber for the raw liquid and a lower chamber for distillation. A purified water outlet pipe is connected to the bottom of the distillation chamber. A spiral condenser is installed inside the distillation chamber, with one end connected to a cold water tank installed on the lower support plate via a pipe. A circulation pump is installed on one side of the cold water tank, with its inlet connected to the other end of the spiral condenser via a pipe, and its outlet connected to the cold water tank via a pipe. A concentrated liquid discharge pipe is installed on the membrane support mesh plate, extending to the bottom of the membrane distillation tank. The top of the concentrated liquid discharge pipe is flush with the top of the hydrophobic microporous membrane, and a second plug is provided to seal the top of the concentrated liquid discharge pipe.

[0016] Preferably, a crystallization tank is provided at the bottom of the membrane distillation tank. The crystallization tank is fixed to the lower support plate, and an agitation mechanism is provided inside the crystallization tank. The agitation mechanism includes: a protective shell disposed inside the crystallization tank, the protective shell being fixedly connected to the inner wall of the crystallization tank by a plurality of support rods fixed on the outer wall; a vertical shaft disposed inside the crystallization tank, a plurality of crystallization stirring paddles being mounted on the vertical shaft, and two scrapers being symmetrically mounted on the plurality of crystallization stirring paddles for scraping off the crystals on the inner wall of the crystallization tank when the crystals are discharged; a crystallization motor fixed inside the protective shell, a spur gear being fixedly mounted on the output shaft of the crystallization motor; and a spline sleeve fixedly sleeved on the vertical shaft, the spline sleeve meshing with the spur gear.

[0017] Preferably, a third plug is fixedly installed at the bottom end of the vertical shaft. The third plug is used to block the bottom opening of the crystallization tank, and a lifting mechanism is installed inside the protective shell for synchronously raising and lowering the third plug and the second plug. The lifting mechanism includes: a second vertical rod fixedly installed at the bottom of the second plug, the second vertical rod passing through the concentrated liquid discharge pipe; a second electric push rod fixedly installed inside the protective shell, the top end of the output rod of the second electric push rod being fixedly connected to a fixing block; and a rectangular slider passing through a rectangular hole opened at the top of the protective shell and vertically slidingly connected to the rectangular hole. The slider has a rotating hole and is rotatably mounted on the vertical shaft through a sealed bearing, and the rectangular slider is fixedly connected to the fixed block; the top of the vertical shaft is rotatably mounted on the bottom of the second vertical rod through the rotating hole and the sealed bearing installed in the hole. When the third plug and the second plug rise, the second plug opens the top opening of the concentrated liquid discharge pipe and simultaneously closes the bottom opening of the crystallizer, discharging the concentrated salt wastewater into the crystallizer; when the third plug and the second plug descend, the second plug closes the top opening of the concentrated liquid discharge pipe and simultaneously opens the bottom opening of the crystallizer, starting to discharge the crystals.

[0018] Compared with related technologies, the wastewater treatment equipment for ulinastatin production provided by this invention has the following beneficial effects: The pretreatment unit in this equipment integrates dynamic / static demulsifying teeth for mechanical shearing and demulsification with membrane filtration, eliminating chemical contamination. The backwashing mechanism prevents membrane clogging and simultaneously removes emulsified organic matter and suspended solids. The adsorption-catalytic oxidation unit combines TiO2-loaded ion exchange resin with a UV-C ultraviolet lamp to simultaneously achieve high salt adsorption and oxidation of recalcitrant organic matter. A linkage vibration mechanism assists in resin regeneration, simplifying operation. The recycling unit efficiently recovers salts and small molecule peptides through a combination of membrane distillation and crystallization stirring, achieving resource recycling. The layered integrated design has a small footprint, a high degree of automation, and balances processing efficiency with the needs of green production. Attached Figure Description

[0019] Figure 1 This invention provides a front view structural schematic diagram of a wastewater treatment device for ulinastatin production. Figure 2 This invention provides a frontal sectional view of a wastewater treatment device for ulinastatin production. Figure 3 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 4 for Figure 2 An enlarged structural diagram of part B shown in the figure; Figure 5 for Figure 2An enlarged structural diagram of section C shown in the figure; Figure 6 for Figure 2 An enlarged structural diagram of part D shown in the figure; Figure 7 for Figure 2 An enlarged structural diagram of part E shown in the figure; Figure 8 for Figure 2 An enlarged structural diagram of part F shown in the figure; Figure 9 This is a frontal cross-sectional view of the recycling mechanism in this invention; Figure 10 for Figure 9 An enlarged structural diagram of part G shown in the figure; Figure 11 This is a front view schematic diagram of the vibration mechanism in this invention; Figure 12 This is a top view of the assembly of the moving-breaking teeth and the filter cartridge in this invention; Figure 13 This is a side view of the cam structure in this invention; Figure 14 This is a frontal cross-sectional view of the concentrated liquid discharge tube in this invention; Figure 15 This is a top view of the assembly of the pretreatment tank and the static crushing tooth in this invention.

[0020] Numbered in the diagram: 1. Pretreatment tank; 2. Upper support plate; 3. Middle support plate; 4. Adsorption tank; 5. Regenerated liquid tank; 6. Lower support plate; 7. Membrane distillation tank; 8. Crystallization tank; 9. Clean water outlet pipe 1; 10. Filter cartridge; 11. Upper shaft tube; 12. Lower shaft tube; 13. Moving dewatering gear; 14. Static dewatering gear; 15. Wastewater inlet pipe; 16. Main motor; 17. Upper main sprocket; 18. First flywheel; 19. First chain; 20. Pump. ; 21. First three-way valve; 22. First suction pipe; 23. Second three-way valve; 24. First delivery pipe; 25. Installation riser; 26. Nozzle; 27. Discharge pipe; 28. First plug; 29. ​​First vertical rod; 30. Connecting block; 31. First electric push rod; 40. Upper pipe; 41. Static sleeve; 42. Lower pipe; 43. Cylinder; 44. Support mesh plate; 45. Resin bed; 46. Upper sleeve; 47. Sliding pipe; 4 8. Upper sliding tube; 49. Lower sleeve; 50. Spring; 51. Vertical rotating tube; 52. Outer sleeve; 53. Second suction tube; 54. Second delivery tube; 55. Stirring rod; 56. Fixing frame; 57. Central shaft; 58. Lower main sprocket; 59. Second flywheel; 60. Second chain; 61. Linkage shaft; 62. Bevel gear; 63. Cam; 64. Force-receiving wheel; 65. UV-C ultraviolet lamp; 70. Membrane support plate; 71. Hydrophobic microstructure 72. Membrane; 73. Concentrate discharge pipe; 74. Second plug; 75. Second vertical rod; 76. Spiral condenser; 77. Cold water tank; 78. Circulating pump; 79. Second electric push rod; 80. Fixing block; 81. Rectangular slider; 82. Protective shell; 83. Support rod; 84. Vertical shaft; 85. Crystallization agitator; 86. Scraper; 87. Crystallization motor; 88. Spur gear; 89. Spline sleeve; 90. Third plug; 91. Second purified water outlet pipe. Detailed Implementation

[0021] This invention provides a wastewater treatment device based on ulinastatin production, such as... Figure 1-15 As shown, the wastewater treatment equipment for ulinastatin production includes: an upper support plate 2, a middle support plate 3, and a lower support plate 6 installed sequentially from top to bottom. Adjacent support plates are connected and fixed by multiple pillars, and pillars for support are also fixedly installed at the four corners of the bottom of the lower support plate 6; a pretreatment tank 1 installed on the top of the upper support plate 2, an adsorption tank 4 installed on the top of the middle support plate 3, and a recovery unit installed on the lower support plate 6; wherein, the top of the pretreatment tank 1 is equipped with a wastewater inlet pipe 15 for conveying the wastewater to be treated into the pretreatment tank 1, and the pretreatment tank 1 is equipped with a pretreatment unit for treating suspended solids, macromolecular organic matter, emulsified organic matter, etc. in the wastewater; the adsorption tank 4 is equipped with an adsorption catalytic oxidation unit for treating small molecule organic matter, residual emulsified organic matter, high salt substances, etc. in the wastewater after treatment by the treatment mechanism; the recovery unit is used to recover salt substances in the regenerated waste liquid discharged from the adsorption tank 4.

[0022] In this embodiment, the wastewater to be treated enters the pretreatment tank 1 through the wastewater inlet pipe 15, where it undergoes demulsification and filtration. Then, it enters the adsorption tank 4, where it adsorbs salt ions such as Na⁺ and Cl⁻. Simultaneously, UV-C ultraviolet light irradiates TiO₂ in the adsorption tank 4, activating it to generate hydroxyl radicals, which strongly oxidize and degrade recalcitrant organic matter. The treated water is then discharged. The resin in the adsorption tank 4 is regenerated using a regeneration liquid to restore its catalytic activity. The regenerated waste liquid is then recycled to recover salts through a recovery unit.

[0023] In a further preferred embodiment of the present invention, the pretreatment unit includes a filter cartridge 10 disposed inside the pretreatment tank 1 and having a filter membrane installed on its outer wall. An upper shaft tube 11 and a lower shaft tube 12 are installed at the top and bottom of the filter cartridge 10. The upper shaft tube 11 and the lower shaft tube 12 are respectively sealed and rotatably connected to the top and bottom of the pretreatment tank 1 through sealed bearings. The lower shaft tube 12 is connected to the inside of the filter cartridge 10 and is used to discharge the wastewater filtered by the filter cartridge 10. Several sets of dynamic demulsifying teeth 13 are installed on the outer wall of the filter cartridge 10, and several sets of static demulsifying teeth 14 are installed on the inner wall of the pretreatment tank 1. A driving mechanism is also installed at the bottom of the upper support plate 2 to drive the filter cartridge 10 and the dynamic demulsifying teeth 13 to rotate, thereby demulsifying the emulsified organic matter in the wastewater (the rotating dynamic demulsifying teeth 13 and the static demulsifying teeth 14 cooperate to form a shearing force, cutting the emulsified droplets, causing the emulsified organic matter to demulsify and stratify, and be simultaneously intercepted by the filter membrane).

[0024] In this embodiment, after the wastewater to be treated enters the pretreatment tank 1, the filter cartridge 10 and the moving demulsifying teeth 13 on the outer wall are rotated by the drive mechanism. The rotating moving demulsifying teeth 13 cooperate with the static demulsifying teeth 14 on the inner wall of the pretreatment tank 1 to form a shearing force, which demulsifies the emulsified organic matter in the wastewater, causing the emulsion droplets to be cut into layers. The filter membrane on the outer wall of the filter cartridge 10 simultaneously intercepts the demulsified organic matter, suspended solids and macromolecular organic matter. The filtered wastewater is discharged through the lower shaft pipe 12 connected to the inside of the filter cartridge 10. This embodiment, through the structural design of demulsification and filtration integration, eliminates the need for additional demulsification equipment. The purely physical demulsification method avoids secondary pollution caused by the addition of chemical agents, improves pretreatment efficiency, and reduces equipment footprint and maintenance costs.

[0025] In a further preferred embodiment of the present invention, the driving mechanism includes a main motor 16 fixed to the bottom of the upper support plate 2 via a frame, an upper main sprocket 17 fixedly sleeved on the output shaft at the top of the main motor 16, a first flywheel 18 fixedly sleeved on the lower shaft tube 12, and the first flywheel 18 and the upper main sprocket 17 are connected by a first chain 19.

[0026] In this embodiment, when the main motor 16 rotates forward, its top output shaft drives the upper main sprocket 17 to rotate. The power is transmitted through the first chain 19 to the first flywheel 18 on the lower shaft tube 12, which in turn drives the lower shaft tube 12 and the filter cartridge 10 to rotate, so that the moving breaking teeth 13 and the stationary breaking teeth 14 cooperate to achieve breaking. The first flywheel 18 is a one-way drive structure. When the main motor 16 rotates in reverse, the power will not be transmitted to the lower shaft tube 12 in the opposite direction.

[0027] In a further preferred embodiment of the present invention, a backwashing mechanism is installed on the pretreatment tank 1 to rinse the outer wall of the filter cartridge 10 to prevent filter membrane blockage. The backwashing mechanism includes a pump 20 fixedly installed on the top of the upper support plate 2. The inlet and outlet of the pump 20 are respectively connected to a first three-way valve 21 and a second three-way valve 23. One port of the first three-way valve 21 is connected to the inside of the pretreatment tank 1 through a first liquid extraction pipe 22. One port of the second three-way valve 23 is connected to a first delivery pipe 24. A mounting vertical pipe 25 with one end connected to the first delivery pipe 24 and the other end being a closed structure is fixedly installed on the inner wall of the pretreatment tank 1. Several nozzles 26 are installed on the mounting vertical pipe 25, which are arranged at equal intervals and facing the outer wall of the filter cartridge 10.

[0028] In this embodiment, when the filter membrane on the outer wall of the filter cartridge 10 becomes clogged, the pump 20 starts and controls the first liquid extraction pipe 22 to extract liquid from the pretreatment tank 1 through the first three-way valve 21. After being pressurized by the pump 20, the liquid enters the first delivery pipe 24 through the second three-way valve 23, and then flows into the installation vertical pipe 25 on the inner wall of the pretreatment tank 1. Finally, it is sprayed out from several nozzles 26 on the installation vertical pipe 25 towards the outer wall of the filter cartridge 10 to backwash the filter membrane, promptly removing suspended solids, large molecular organic matter and other impurities trapped on the surface of the filter membrane. This effectively avoids filter membrane clogging from affecting the pretreatment efficiency, extends the service life of the filter membrane, and reduces the maintenance frequency and cost of the equipment.

[0029] In a further preferred embodiment of the present invention, a discharge pipe 27 for discharging concentrated waste liquid containing high concentrations of organic matter is installed at the bottom of the pretreatment tank 1, and a first plug 28 is provided at the top of the discharge pipe 27, and an opening and closing mechanism is provided for vertically moving the first plug 28 to realize the opening and closing of the top opening of the discharge pipe 27. The opening and closing mechanism includes a first vertical rod 29, a connecting block 30 and a first electric push rod 31. The first vertical rod 29 is fixedly installed on the top of the first plug 28 and extends to the top of the pretreatment tank 1 and is vertically slidably connected to the top of the pretreatment tank 1. The connecting block 30 is fixedly installed on the top of the first vertical rod 29, and the first electric push rod 31 is fixedly installed on the top of the pretreatment tank 1 and the top of the output rod is fixedly connected to the connecting block 30.

[0030] In this embodiment, when the concentrated waste liquid containing high concentrations of organic matter accumulated in the pretreatment tank 1 needs to be discharged, the first electric push rod 31 is activated. Its output rod drives the connecting block 30 and the first vertical rod 29 fixed thereto to move vertically upward. The first vertical rod 29 drives the first plug 28 at the bottom to move upward simultaneously, opening the top of the discharge pipe 27. The concentrated waste liquid is then discharged through the discharge pipe 27. After the discharge is completed, the first electric push rod 31 reverses its movement, driving the first plug 28 downward to close the top of the discharge pipe 27. This opening and closing mechanism, driven by the first electric push rod 31, achieves automated lifting and lowering of the first plug 28 without manual operation, ensuring the convenience and sealing of the discharge process. Timely discharge of concentrated waste liquid can prevent its accumulation in the pretreatment tank 1 from affecting the subsequent pretreatment effect, reducing the risk of internal contamination of the equipment, and further improving the operational stability of the pretreatment unit.

[0031] In a further preferred embodiment of the present invention, an upper connecting pipe 40 and a lower connecting pipe 42 are respectively installed at the top and bottom of the adsorption tank 4. A stationary sleeve 41 is fixedly connected to the top of the upper connecting pipe 40, and the bottom end of the lower shaft tube 12 is rotatably connected to the stationary sleeve 41 through a sealed bearing. The adsorption catalytic oxidation unit includes a cylindrical body 43 with transparent sidewalls. Two vertically distributed support mesh plates 44 are installed on the inner wall of the cylindrical body 43. A resin bed 45 is disposed between the two support mesh plates 44. The resin bed 45 is loaded with TiO2 ion exchange resin. The exchange groups of the ion exchange resin adsorb salt ions such as Na⁺ and Cl⁻ in the wastewater. An upper sleeve 46 and a lower sliding pipe 47 are respectively fixedly installed at the top and bottom of the cylindrical body 43. Both are connected to the inside of the cylinder 43. The upper sliding pipe 48 and the lower sleeve 49 are fixedly installed on the top inner wall and the bottom inner wall of the adsorption tank 4, respectively. The upper sleeve 46 is sealed and sleeved on the outer wall of the upper sliding pipe 48 and vertically slidably connected to the upper sliding pipe 48. The lower sleeve 49 is sealed and sleeved on the lower sliding pipe 47 and vertically slidably connected to the lower sliding pipe 47. The upper sliding pipe 48 is connected to the upper connecting pipe 40, and the lower sleeve 49 is connected to the lower shaft pipe 42. Springs 50 are slidably sleeved on the upper sliding pipe 48 and the lower sliding pipe 47. A purified water outlet pipe 9 is installed on the side wall of the lower shaft pipe 42. Solenoid valves are installed on both the purified water outlet pipe 9 and the lower shaft pipe 42. The water treated by the adsorption catalytic oxidation unit is discharged through the purified water outlet pipe 9 by controlling the valves. In this embodiment, the pretreated wastewater enters the adsorption tank 4 through the lower shaft pipe 12, the static sleeve 41, and the upper pipe 40. Then, it flows into the transparent cylinder 43 through the upper sliding pipe 48 and the upper sleeve 46, passing through the resin bed 45 composed of TiO2-loaded ion exchange resin between the two support mesh plates 44. The resin exchange groups adsorb salt ions such as Na⁺ and Cl⁻ in the wastewater. With the help of the UV-C ultraviolet lamp 65 in the adsorption tank 4, the recalcitrant organic matter can be oxidized. After treatment, the water flows to the lower shaft pipe 12 through the lower sliding pipe 47 and the lower sleeve 49. The water can be discharged from the clean water outlet pipe 9 by operating the solenoid valve.

[0032] In a further preferred embodiment of the present invention, a plurality of UV-C ultraviolet lamps 65 are installed on the inner wall of the adsorption tank 4. The UV-C ultraviolet light irradiates the TiO2 exchange resin, activating it to generate hydroxyl radicals, which strongly oxidize and degrade recalcitrant organic matter (such as organic derivatives and residual emulsified organic matter).

[0033] In this embodiment, when the adsorption-catalytic oxidation unit is working, several UV-C ultraviolet lamps 65 on the inner wall of the adsorption tank 4 are turned on, and the emitted UV-C ultraviolet light irradiates the ion exchange resin loaded with TiO2 in the resin bed 45, activating TiO2 to generate highly oxidizing hydroxyl radicals. These hydroxyl radicals can efficiently and strongly oxidize and degrade organic derivatives, residual emulsified organic matter, and other recalcitrant substances in wastewater. At the same time, the ion exchange resin simultaneously adsorbs salt ions such as Na⁺ and Cl⁻ in the wastewater, achieving synergistic treatment of degradation and adsorption. Compared with a single treatment method, this significantly improves the wastewater purification effect, is suitable for the characteristics of ulinastatin production wastewater containing a lot of recalcitrant organic matter, and UV-C ultraviolet photocatalysis does not require the addition of chemical oxidants, avoiding secondary pollution, ensuring the purity of subsequent resource recovery, and improving the environmental friendliness and treatment applicability of the equipment.

[0034] In another embodiment of the present invention, a regenerated liquid tank 5 is provided on the second support plate 3, and a regenerated liquid conveying mechanism is provided for conveying regenerated liquid to the TiO2 ion exchange resin on the resin bed 45. The regenerated liquid conveying mechanism includes a vertical rotating pipe 51 extending into the regenerated liquid tank 5. An outer sleeve 52 is rotatably sleeved on the vertical rotating pipe 51 through two sealed bearings, and the bottom end of the outer sleeve 52 is fixedly connected to the top of the regenerated liquid tank 5. An inner cavity is formed between the outer sleeve 52 and the vertical rotating pipe 51. Several through holes are opened on the outer wall of the section of the vertical rotating pipe 51 located inside the outer sleeve 52. A second suction pipe 53 is connected to one side of the outer sleeve 52. One end of the second suction pipe 53 is connected to the inside of the outer sleeve 52, and the other end of the second suction pipe 53 is connected to the other port of the first three-way valve 21. The other port of the second three-way valve 23 is connected to a second conveying pipe 54, and the other end of the second output pipe 54 is connected to the upper shaft pipe 11.

[0035] In this embodiment, when the TiO2-loaded ion exchange resin in the resin bed 45 needs regeneration, the pump 20 is started and switched to the second extraction pipe 53 via the first three-way valve 21 to extract the regenerated liquid from the regenerated liquid tank 5. The regenerated liquid enters the inner cavity formed by the outer sleeve 52 and the vertical rotating pipe 51 through the through hole on the vertical rotating pipe 51, and is then transported to the pump 20 via the second extraction pipe 53. After being pressurized, it is switched to the second delivery pipe 54 via the second three-way valve 23, and is then sent into the upper shaft pipe 11 and flows into the filter cartridge 10 through the second delivery pipe 54, finally entering the resin bed 45 to complete the resin regeneration. The sealed bearing between the vertical rotating pipe 51 and the outer sleeve 52 ensures both rotation and sealing. This regenerated liquid delivery mechanism reuses the pump 20 and three-way valve of the backwashing mechanism, eliminating the need for additional delivery equipment, simplifying the equipment structure and reducing costs. The function of backwashing and regenerated liquid delivery can be switched by valve switching, making operation convenient. At the same time, the sealing design prevents regenerated liquid leakage, ensuring the regeneration effect and the stability of equipment operation.

[0036] In another embodiment of the present invention, a linkage stirring mechanism is also installed on the regenerated liquid tank 5. The linkage mechanism includes a plurality of stirring rods 55 fixed on the vertical rotating pipe 51 and located inside the regenerated liquid tank 5. A fixing frame 56 is fixedly installed on the top of the regenerated liquid tank 5, and a central shaft 57 is rotatably installed on the fixing frame 56 through bearings. The bottom end of the central shaft 57 is fixedly connected to the top end of the vertical rotating pipe 51. The main motor 16 is a dual-shaft motor, and a lower main sprocket 58 is fixedly sleeved on the output shaft at the bottom end of the main motor 16. A second flywheel 69 is fixedly sleeved on the central shaft 57. The second flywheel 69 and the lower main sprocket 58 are connected by a sleeved second chain 60.

[0037] In this embodiment, when the main motor 16 reverses, its bottom output shaft drives the lower main sprocket 58 to rotate. The power is transmitted through the second chain 60 to the second flywheel 59 on the central shaft 57, which in turn drives the central shaft 57 and the vertical rotating tube 51 fixed thereto to rotate. The vertical rotating tube 51 drives several stirring rods 55 in the regenerated liquid tank 5 to rotate, thereby stirring the regenerated liquid in the regenerated liquid tank 5 and ensuring uniform concentration of the regenerated liquid. The second flywheel 59 has a unidirectional drive structure, so the power will not be transmitted to the central shaft 57 in the reverse direction when the main motor 16 rotates forward. This linkage stirring mechanism reuses the dual-shaft main motor 16 as the drive source and works with the unidirectional flywheel to achieve time-sharing linkage with the filter cartridge 10. There is no need to configure an additional stirring motor, which simplifies the equipment transmission structure and reduces energy consumption and maintenance costs. At the same time, the stirring action of the stirring rods 55 can prevent the regenerated liquid components from stratifying, improve the subsequent resin regeneration effect, and ensure the continuous and stable operation of the adsorption catalytic oxidation unit.

[0038] In another embodiment of the present invention, the adsorption tank 4 is provided with a linkage vibration mechanism. The linkage mechanism includes a linkage shaft 61 that passes through one side of the adsorption tank 4 and is rotatably connected to the adsorption tank. The linkage shaft 61 is arranged laterally, and a bevel gear 62 is fixedly sleeved on one end of the linkage shaft 61 and the top end of the central shaft 57. The two bevel gears 62 are meshing. A cam 63 is fixedly sleeved on one end of the linkage shaft 61 inside the adsorption tank 4. A force-receiving wheel 64 is rotatably installed on the top of the cylinder 43. The cam 63 and the force-receiving wheel 64 are parallel in axis. During the rotation of the cam 63, the cylinder 43 vibrates up and down, causing the resin to disperse.

[0039] When the main motor 16 rotates forward, it drives the lower shaft tube 12 to rotate through the transmission of the upper main sprocket 17, the first chain 19 and the first flywheel 18, thereby realizing the rotation of the filter cartridge 10, while the central shaft 57 does not rotate. When the main motor 16 reverses, it drives the central shaft 57 to rotate through the transmission of the lower main sprocket 58, the second chain 60 and the second flywheel, thereby agitating the regenerated liquid in the regenerated liquid tank 5 and causing the cylinder 43 to vibrate up and down, while the lower shaft tube 12 does not rotate.

[0040] In this embodiment, when the main motor 16 reverses, its bottom output shaft drives the central shaft 57 to rotate via the lower main sprocket 58, the second chain 60, and the second flywheel. The central shaft 57 drives the horizontally arranged linkage shaft 61 to rotate via the bevel gears 62 meshing at both ends. One end of the linkage shaft 61 located inside the adsorption tank 4 drives the cam 63 to rotate. During the rotation of the cam 63, it cooperates with the force wheel 64 at the top of the cylinder 43 to push the cylinder 43 to vibrate up and down, causing the resin in the resin bed 45 to be shaken apart. At the same time, the central shaft 57 drives the vertical rotating tube 51 and the stirring rod 55 to rotate. The regenerated liquid in the regenerated liquid tank 5 is stirred, and the unidirectional drive characteristics of the second flywheel and the first flywheel prevent the lower shaft tube 12 from rotating when the main motor 16 reverses. This linkage vibration mechanism reuses the dual-shaft main motor 16 and the central shaft 57 for transmission, eliminating the need for additional vibration drive equipment, simplifying the structure and reducing energy consumption. The up-and-down vibration of the cylinder 43 can fully disperse the resin, which, together with the regenerated liquid conveying mechanism, can improve the resin regeneration efficiency and effect, ensuring the continuous and stable operation of the adsorption catalytic oxidation unit. The unidirectional transmission design avoids mutual interference between mechanisms under different working modes.

[0041] In a further preferred embodiment of the present invention, the recovery unit includes a membrane distillation tank 7 and a crystallization tank 8, which are located between a middle support plate 3 and a lower support plate 6. A hydrophobic microporous membrane 71 is disposed inside the membrane distillation tank 7. The hydrophobic microporous membrane 71 is installed and supported by a membrane support mesh plate 70 fixed to the inner wall of the membrane distillation tank 7, dividing the membrane distillation tank 7 into upper and lower spaces. The upper space is the raw liquid chamber, and the lower space is the distillation chamber. A purified water outlet pipe 90 is connected to the bottom of the distillation chamber, and a spiral condenser 75 is installed inside the distillation chamber. One end of the condenser tube 75 is connected to the cold water tank 76 installed on the lower support plate 6 via a pipe. A circulation pump 77 is installed on one side of the cold water tank 76. The inlet of the circulation pump 77 is connected to the other end of the spiral condenser tube 75 via a pipe, and the outlet is connected to the cold water tank 76 via a pipe. A concentrated liquid discharge pipe 72 is installed on the membrane support plate 70, with its bottom end extending to the bottom of the membrane distillation tank 7. The top opening of the concentrated liquid discharge pipe 72 is flush with the top of the hydrophobic microporous membrane 71, and a second plug 73 is provided to block the top opening of the concentrated liquid discharge pipe 72.

[0042] In this embodiment, the saline wastewater from the regenerated liquid discharged from the adsorption tank 4 enters the feed chamber of the membrane distillation tank 7. The hydrophobic microporous membrane 71, supported by the membrane support mesh 70, divides the membrane distillation tank 7 into the feed chamber and the distillation chamber. Water molecules in the feed chamber vaporize and pass through the hydrophobic microporous membrane 71 into the distillation chamber. (The wastewater in the feed chamber contacts the upper surface of the hydrophobic microporous membrane 71. Due to thermal motion and temperature difference at room temperature, water molecules near the membrane surface gain sufficient energy to overcome the intermolecular forces of liquid water and vaporize into water vapor, i.e., gaseous molecules. The vaporization process only occurs at the "liquid-gas interface" on the membrane surface, without requiring overall heating of the wastewater to the boiling point, unlike traditional distillation, resulting in extremely low energy consumption.) The water vapor generated by vaporization... Under the gradient effect of "high vapor pressure in the raw liquid chamber and low vapor pressure in the distillation chamber," the vapor diffuses towards the distillation chamber. The circulating pump 77 drives the cold water in the cold water tank 76 to circulate in the spiral condenser tube 75, so that the water vapor in the distillation chamber is condensed into clean water and discharged from the clean water outlet pipe 90. The concentrated salt solution in the raw liquid chamber can be discharged through the concentrated liquid discharge pipe 72 after the second plug 73 is opened. This recovery unit achieves the initial separation of water and salt through membrane distillation. The cooperation between the spiral condenser tube 75 and the circulating pump 77 ensures the condensation efficiency. The membrane support plate 70 improves the stability of the hydrophobic microporous membrane 71. The overall pure physical separation method avoids secondary pollution, lays the foundation for subsequent salt recovery, and improves the resource utilization rate of wastewater.

[0043] In a further preferred embodiment of the present invention, a crystallization tank 8 is provided at the bottom of the membrane distillation tank 7. The crystallization tank 8 is fixed on the lower support plate 6. An agitation mechanism is provided inside the crystallization tank 8. The agitation mechanism includes: a protective shell 81 disposed inside the crystallization tank 8, the protective shell 81 being fixedly connected to the inner wall of the crystallization tank 8 by a plurality of support rods 82 fixed on the outer wall; a vertical shaft 83 disposed inside the crystallization tank 8, a plurality of crystallization stirring paddles 84 being mounted on the vertical shaft 83, and two scrapers symmetrically mounted on the plurality of crystallization stirring paddles 84 for scraping the crystals on the inner wall of the crystallization tank 8 when the crystals are discharged; a crystallization motor 86 fixed inside the protective shell 81, a spur gear 87 being fixedly mounted on the output shaft of the crystallization motor 86; and a spline sleeve 88 fixedly sleeved on the vertical shaft 83, the spline sleeve 88 meshing with the spur gear 87.

[0044] In this embodiment, after the concentrated brine discharged from the membrane distillation tank 7 enters the crystallization tank 8, the crystallization motor 86 inside the protective shell 81 starts, and its output shaft drives the spur gear 87 to rotate. Through the meshing transmission between the spur gear 87 and the spline sleeve 88, the vertical shaft 83 is driven to rotate. The vertical shaft 83 drives several crystallization stirring paddles 84 to rotate and stir the concentrated brine, promoting the crystallization and precipitation of salt. The symmetrical scrapers on the crystallization stirring paddles 84 can scrape off the crystals attached to the inner wall of the crystallization tank 8 when the crystals are discharged. The protective shell 81 is fixed to the inner wall of the crystallization tank 8 by the support rod 82, forming a protective barrier for components such as the crystallization motor 86. This stirring mechanism can prevent salt crystals from clumping and adhering to the wall surface, ensuring the uniformity of crystallization and the thoroughness of crystal discharge, improving the efficiency and purity of salt recovery. The protective shell 81 can prevent the concentrated brine from corroding the transmission components, extend the service life of the mechanism, and ensure the stable operation of the recovery unit.

[0045] In this scheme, the principle of crystallization is explained as follows: When a high-concentration salt solution enters the crystallizer, the stirring paddle rotates, and the resulting shear force and turbulence cause the salt ions (Na⁺, Cl⁻) to dehydrate (originally bound to water molecules to form hydrated ions). The freely moving salt ions collide and combine with each other to form tiny crystal nuclei (particle size <0.05mm).

[0046] In supersaturated solutions, the precipitation rate of salt ions is greater than the dissolution rate, leading to spontaneous aggregation of ions to form crystal nuclei. The role of the stirring paddle is to break the hydration layer of ions, promoting free collisions and preventing the localized aggregation of crystal nuclei (preventing crystal bursting). This design utilizes secondary nucleation (without the addition of additional seed crystals), leveraging the solution's supersaturation and the kinetics of stirring to form uniform, tiny crystal nuclei.

[0047] After crystal nuclei form, the stirring paddle speed is increased to homogenize the salt solution concentration in the crystallizer. Freely moving salt ions (Na⁺, Cl⁻) diffuse directionally to the surface of the crystal nuclei and are deposited in an orderly manner according to the crystal structure of NaCl (face-centered cubic structure), and the particle size of the crystal nuclei gradually increases.

[0048] The ion concentration gradient on the crystal nucleus surface is the driving force for growth—the ion concentration on the crystal nucleus surface is lower than the concentration in the bulk solution, and salt ions will spontaneously diffuse from the high concentration region (bulk solution) to the low concentration region (crystal nucleus surface) and combine with the crystal nucleus. The role of the stirring paddle is to enhance ion diffusion (reduce the concentration gradient and make ions deposit uniformly), while preventing crystal nuclei from sticking together (shear force breaks up the newly formed aggregates), ensuring that the crystal nuclei grow uniformly into regular cubic salt crystals.

[0049] After the predetermined time, the controller increases the agitator speed to 50 r / min to intensify stirring and loosen the salt crystals, suspending them in the solution. Then, the bottom opening of the crystallization tank is opened, and the salt crystals are discharged from the crystallization tank along with a small amount of residual liquid under the combined action of gravity and fluid dynamics.

[0050] In a further preferred embodiment of the present invention, a third plug 89 is fixedly installed at the bottom end of the vertical shaft 83. The third plug 89 is used to block the bottom opening of the crystallization tank 8, and a lifting mechanism is installed inside the protective shell 81 for synchronously lifting the third plug 89 and the second plug 73. The lifting mechanism includes: a second vertical rod 74 fixedly installed at the bottom of the second plug 73, the second vertical rod 74 penetrating the concentrated liquid discharge pipe 72; a second electric push rod 78 fixedly installed inside the protective shell 81, the top end of the output rod of the second electric push rod 78 being fixedly connected to a fixing block 79; and a rectangular slider 8 penetrating a rectangular hole opened at the top of the protective shell 81 and vertically slidingly connected to the rectangular hole. 0. The rectangular slider 80 has a rotating hole and is rotatably sleeved on the vertical shaft 83 through a sealed bearing, and the rectangular slider 80 is fixedly connected to the fixed block 79; the top end of the vertical shaft 83 is rotatably sleeved on the bottom end of the second vertical rod 74 through the rotating hole and the sealed bearing installed in the hole. When the third plug 89 and the second plug 73 rise, the second plug 73 opens the top opening of the concentrated liquid discharge pipe 72 and simultaneously closes the bottom opening of the crystallization tank 8, discharging the concentrated salt wastewater into the crystallization tank 8; when the third plug 89 and the second plug 73 descend, the second plug 73 closes the top opening of the concentrated liquid discharge pipe 72 and simultaneously opens the bottom opening of the crystallization tank 8, starting to discharge the crystals.

[0051] In this embodiment, when concentrated brine needs to be supplied to the crystallizer 8, the second electric push rod 78 inside the protective shell 81 is activated, causing the fixing block 79 to rise. The fixing block 79 causes the rectangular slider 80 to move vertically upward along the rectangular hole at the top of the protective shell 81. The rectangular slider 80 causes the vertical shaft 83 to rise synchronously. The top of the vertical shaft 83 drives the second vertical rod 74 and the second plug 73 to rise through the sealed bearing. At the same time, the bottom of the vertical shaft 83 drives the third plug 89 to rise. At this time, the second plug 73 opens the top opening of the concentrated brine discharge pipe 72, and the third plug 89 closes the crystallizer 8. The concentrated brine flows smoothly into the crystallization tank 8 through the bottom opening, and then the crystallization motor 86 can be started to perform stirring. After crystallization, the second electric push rod 78 moves in the opposite direction to drive the components to descend. The second plug 73 closes the top opening of the concentrated brine discharge pipe 72, and the third plug 89 opens the bottom opening of the crystallization tank 8 to discharge the crystals. The rectangular slider 80 is connected to the sealed bearing of the vertical shaft 83 to ensure that the vertical shaft 83 rotates without affecting the lifting. This lifting mechanism realizes the synchronous linkage control of the second plug 73 and the third plug 89, without the need for separate drive, simplifying the operation process.

[0052] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods. In summary, compared with related technologies, this invention specifically solves the problems of dispersed equipment, easy pollution from demulsification, cumbersome resin regeneration, and lack of resource recovery in the treatment of ulinastatin production wastewater. By integrating a pretreatment tank 1, an adsorption tank 4, and a recovery unit in a layered manner, the entire wastewater treatment process is integrated. The pretreatment unit integrates mechanical demulsification and filtration, and a backwashing mechanism ensures stable operation. The adsorption-catalytic oxidation unit coordinates salt adsorption and organic matter degradation, with a single main motor 16 and a unidirectional flywheel driving multiple mechanisms in a time-sharing manner, simplifying the structure and reducing energy consumption. The recovery unit achieves salt recovery through membrane distillation and crystallization, and a lifting mechanism synchronously controls the flow path switching. The overall process is free of chemical pollution, highly automated, and occupies a small footprint, balancing treatment efficiency and resource recycling, and is suitable for the green production needs of the biopharmaceutical industry.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A wastewater treatment device based on ulinastatin production, characterized in that, include: The upper support plate, middle support plate and lower support plate are installed from top to bottom. Adjacent support plates are connected and fixed by multiple pillars, and pillars for support are also fixedly installed at the four corners of the bottom of the lower support plate. The pretreatment tank is installed on the top of the upper support plate, the adsorption tank is installed on the top of the middle support plate, and the recovery unit is installed on the lower support plate. The pretreatment tank is equipped with a wastewater inlet pipe at the top for conveying the wastewater to be treated into the pretreatment tank, and a pretreatment unit is installed inside the pretreatment tank for treating suspended solids, macromolecular organic matter, and emulsified organic matter in the wastewater. The adsorption tank is equipped with an adsorption catalytic oxidation unit for treating small molecule organic matter and residual emulsified organic matter in the wastewater after treatment by the treatment mechanism; The recovery unit is used to recover salts from the regenerated waste liquid discharged from the adsorption tank.

2. The wastewater treatment equipment based on ulinastatin production according to claim 1, characterized in that, The pretreatment unit includes a filter cartridge installed inside a pretreatment tank and with a filter membrane mounted on its outer wall. An upper shaft tube and a lower shaft tube are installed at the top and bottom of the filter cartridge. The upper shaft tube and the lower shaft tube are respectively sealed and rotatably connected to the top and bottom of the pretreatment tank through sealed bearings. The lower shaft tube is connected to the inside of the filter cartridge and is used to discharge the wastewater filtered by the filter cartridge. Several sets of dynamic demulsifying teeth are installed on the outer wall of the filter cartridge, and several sets of static demulsifying teeth are installed on the inner wall of the pretreatment tank. A drive mechanism is also installed at the bottom of the upper support plate to drive the filter cartridge and the dynamic demulsifying teeth to rotate and demulsify the emulsified organic matter in the wastewater.

3. The wastewater treatment equipment for ulinastatin production according to claim 2, characterized in that, The drive mechanism includes a main motor fixed to the bottom of the upper support plate via a frame. An upper main sprocket is fixedly sleeved on the output shaft at the top of the main motor, and a first flywheel is fixedly sleeved on the lower shaft tube. The first flywheel and the upper main sprocket are connected by a first chain.

4. The wastewater treatment equipment based on ulinastatin production according to claim 2, characterized in that, The pretreatment tank is equipped with a backwashing mechanism for rinsing the outer wall of the filter cartridge. The backwashing mechanism includes a pump fixedly installed on the top of the upper support plate. The inlet and outlet of the pump are respectively connected to a first three-way valve and a second three-way valve. One port of the first three-way valve is connected to the inside of the pretreatment tank through a first liquid extraction pipe, and one port of the second three-way valve is connected to a first delivery pipe. A vertical installation pipe with one end connected to the first delivery pipe and the other end closed is fixedly installed on the inner wall of the pretreatment tank. Several nozzles are installed on the vertical installation pipe, which are arranged at equal intervals and facing the outer wall of the filter cartridge.

5. The wastewater treatment equipment for ulinastatin production according to claim 1, characterized in that, The bottom of the pretreatment tank is equipped with a discharge pipe for discharging concentrated waste liquid containing high concentrations of organic matter. The top of the discharge pipe is provided with a first plug and is equipped with an opening and closing mechanism for vertically moving the first plug to open and close the top of the discharge pipe. The opening and closing mechanism includes a first vertical rod, a connecting block and a first electric push rod. The first vertical rod is fixedly installed on the top of the first plug and extends to the top of the pretreatment tank and is vertically slidably connected to the top of the pretreatment tank. The connecting block is fixedly installed on the top of the first vertical rod. The first electric push rod is fixedly installed on the top of the pretreatment tank and the top of the output rod is fixedly connected to the connecting block.

6. The wastewater treatment equipment based on ulinastatin production according to claim 2, characterized in that, The top and bottom of the adsorption tank are respectively equipped with an upper connecting pipe and a lower connecting pipe. A stationary sleeve is fixedly connected to the top of the upper connecting pipe, and the bottom of the lower connecting pipe is rotatably connected to the stationary sleeve via a sealed bearing. The adsorption catalytic oxidation unit includes a cylindrical body with transparent sidewalls. Two vertically distributed support mesh plates are installed on the inner wall of the cylindrical body, and a resin bed is arranged between the two support mesh plates. The resin bed is loaded with TiO2 ion exchange resin. An upper sleeve and a lower sliding pipe are fixedly installed at the top and bottom of the cylindrical body, respectively, and both are connected to the inside of the cylindrical body. The top of the adsorption tank... An upper sliding pipe and a lower sleeve are fixedly installed on the inner wall and bottom, respectively. The upper sleeve is sealed and slidably connected to the outer wall of the upper sliding pipe. The lower sleeve is sealed and slidably connected to the lower sliding pipe. The upper sliding pipe is connected to the upper connecting pipe, and the lower sleeve is connected to the lower shaft pipe. Springs are slidably fitted on the upper sliding pipe and the lower sliding pipe. A purified water outlet pipe is installed on the side wall of the lower shaft pipe. Solenoid valves are installed on both the purified water outlet pipe and the lower shaft pipe. Water treated by the adsorption catalytic oxidation unit is discharged through the purified water outlet pipe by operating the valves.

7. The wastewater treatment equipment for ulinastatin production according to claim 4, characterized in that, The inner wall of the adsorption tank is equipped with several UV-C ultraviolet lamps. UV-C ultraviolet light irradiates TiO2 exchange resin, activating it to generate hydroxyl free radicals, which strongly oxidize and degrade recalcitrant organic matter.

8. The wastewater treatment equipment for ulinastatin production according to claim 7, characterized in that, The recovery unit includes a membrane distillation tank and a crystallization tank, located between a middle support plate and a lower support plate. A hydrophobic microporous membrane is installed inside the membrane distillation tank, supported by a membrane support mesh plate fixed to the inner wall of the tank. This divides the tank into upper and lower spaces: an upper chamber for the raw liquid and a lower chamber for distillation. A purified water outlet pipe is connected to the bottom of the distillation chamber. A spiral condenser is installed inside the distillation chamber, with one end connected to a cold water tank mounted on the lower support plate via a pipe. A circulation pump is installed on one side of the cold water tank, with its inlet connected to the other end of the spiral condenser via a pipe, and its outlet connected to the cold water tank via a pipe. A concentrated liquid discharge pipe is installed on the membrane support mesh plate, extending to the bottom of the membrane distillation tank. The top of the concentrated liquid discharge pipe is flush with the top of the hydrophobic microporous membrane, and a second plug is provided to seal the top of the concentrated liquid discharge pipe.

9. The wastewater treatment equipment for ulinastatin production according to claim 8, characterized in that, A crystallization tank is located at the bottom of the membrane distillation jar, and the crystallization tank is fixed to the lower support plate. An agitation mechanism is installed inside the crystallization tank, comprising: a protective shell disposed within the crystallization tank, the protective shell being fixedly connected to the inner wall of the crystallization tank via several support rods fixed to its outer wall; a vertical shaft disposed within the crystallization tank, on which several crystallization stirring paddles are mounted, and two scrapers are symmetrically mounted on each of the stirring paddles for scraping away crystals from the inner wall of the crystallization tank during discharge; a crystallization motor fixed within the protective shell, on which a spur gear is fixedly mounted; and a spline sleeve fixedly fitted onto the vertical shaft, the spline sleeve meshing with the spur gear.

10. The wastewater treatment equipment for ulinastatin production according to claim 9, characterized in that, A third plug is fixedly installed at the bottom of the vertical shaft. The third plug is used to block the bottom opening of the crystallization tank. A lifting mechanism is installed inside the protective shell to synchronously raise and lower the third plug and the second plug. The lifting mechanism includes: a second vertical rod fixedly installed at the bottom of the second plug, which passes through the concentrated liquid discharge pipe; a second electric push rod fixedly installed inside the protective shell, with a fixing block fixedly connected to the top of the output rod of the second electric push rod; a rectangular slider passing through a rectangular hole in the top of the protective shell and vertically slidingly connected to the rectangular hole, the rectangular slider having a rotating hole and being rotatably sleeved on the vertical shaft through a sealed bearing, and the rectangular slider being fixedly connected to the fixing block; the top of the vertical shaft is rotatably sleeved on the bottom of the second vertical rod through the rotating hole and the sealed bearing installed inside the hole.

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