Solvent rectification device for chemical waste liquid treatment

Abstract

The invention relates to the technical field of chemical waste liquid rectification separation, in particular to a solvent rectification device for chemical waste liquid treatment, which comprises a frame, two mounting boxes, a tower body and the like, the frame is connected with the two mounting boxes, the tower body is mounted on the two mounting boxes, and the mounting boxes are communicated with the tower body. Chemical waste liquid can be injected into the tower body through the waste liquid pipe, a high-boiling-point solvent can be injected into the tower body through the solvent pipe, the original azeotropic condition is broken, and the relative volatility among components is changed, so that rectification separation is realized, the filler can be conveyed upwards through the spiral conveyor, the filler is conveyed into the tower body for loading, and the production efficiency is improved. The sliding plate can be driven by the lead screw motor to move rightwards, so that the discharge hole corresponds to the tower body, old filler falls onto the material guide plate through the discharge hole and rolls leftwards to be discharged, the filler is automatically cleaned and replaced, manpower and material resources can be saved, and the safety can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical waste liquid distillation separation, and in particular to a solvent distillation device for chemical waste liquid treatment. Background Art

[0002] In the process of chemical wastewater treatment, distillation is a widely used separation technology for extracting and purifying valuable solvents or compounds from complex multi-component mixtures. As a highly efficient distillation equipment, packed towers are widely used because of their large gas-liquid contact area, low pressure drop and high mass transfer efficiency.

[0003] The working principle of a packed tower is to evenly distribute the liquid material on the surface of the packing in the tower and introduce hot gas (such as steam or hot air) at the same time so that the gas phase and liquid phase are fully in contact on the surface of the packing to achieve efficient mass transfer and separation.

[0004] The design of a packed tower usually includes components such as structured packing or random packing, a liquid distributor, a gas inlet, a condenser and a reboiler. Structured packing (such as corrugated plates and mesh packing) is suitable for large-scale continuous operation and has regular arrangement and high throughput characteristics; while random packing (such as Raschig rings and Pall rings) is suitable for small-scale or intermittent operation. Although the pressure drop is large, it can also provide good separation effects under specific conditions. In addition, the operating conditions of the packed tower (such as temperature, pressure, reflux ratio) need to be optimized according to the specific properties of the waste liquid to ensure the best separation effect and energy efficiency.

[0005] As the number of distillation times increases, the packing inside the packed tower will gradually accumulate impurities or suffer physical damage, leading to blockage. This blockage will not only reduce the gas-liquid contact efficiency in the tower and affect the separation effect, but may also cause the system pressure to increase, increasing operational risks. It is necessary to clean or replace the packing in time. The internal structure of the packed tower is compact, especially the gaps between the regular packing layers are small. Once blockage occurs, cleaning is very difficult and requires professional technicians and special tools. It will consume a lot of manpower and material resources. In addition, improper operation during the removal and reinstallation of the packing may cause safety accidents, further increasing maintenance costs and risks. Summary of the invention

[0006] In view of the problems existing in the above background technology, the purpose of the present invention is to provide a solvent distillation device for chemical waste liquid treatment, which can overcome the shortcomings of compact internal structure of the packing tower, especially small gaps between regular packing layers. Once blockage occurs, cleaning work is very difficult, requiring professional technicians and special tools, consuming a lot of manpower and material resources, and improper operation during the disassembly and reinstallation of the packing may cause safety accidents, further increasing maintenance costs and risks.

[0007] The technical scheme of the present invention is: a solvent distillation device for treating chemical waste liquid, comprising a frame, an installation box, a tower body, a waste liquid pipe, a solvent pipe, a hot air pipe, a hot air box, a diffusion nozzle, a heater, a discharge mechanism, a loading mechanism and a blocking mechanism, wherein two installation boxes are connected to the frame, a tower body is commonly installed on the two installation boxes, and the installation boxes and the tower body are communicated, a waste liquid pipe is connected to the upper part of the tower body, a solvent pipe is connected to the top of the waste liquid pipe, a hot air pipe is connected to the lower part of the tower body, a hot air box is connected to the hot air pipe, the hot air box is located in the tower body, a diffusion nozzle is installed on the top of the hot air box, a one-way valve is arranged in the diffusion nozzle, a heater is installed at the lower part of the tower body, the discharge mechanism is used to discharge the old filler in the tower body, the loading mechanism is used to load the new filler into the tower body, and the blocking mechanism is used to block the filler in the tower body.

[0008] In addition, it is particularly preferred that the unloading mechanism includes a guide frame, a sliding frame, a cylinder, a guide plate, a guide plate and a sealing assembly, the bottom of the installation box is connected to the guide frame, the guide frame is connected to the tower body, the bottom of the guide frame is slidably connected to the sliding frame, the guide frame is installed with a cylinder, the telescopic rod of the cylinder is connected to the sliding frame, the top of the sliding frame is connected to the guide plate, the guide plate is located in the guide frame, the guide frame is connected with a guide plate for guiding the guide plate, the guide plate is connected to the tower body, two discharge ports are opened on the tower body, the guide plate is located in the discharge port, and the guide plate can enter the tower body through the discharge port, the old filler in the tower body will fall onto the guide plate and be discharged through the guide plate, and the sealing assembly is used to seal the discharge port on the tower body.

[0009] In addition, it is particularly preferred that the sealing assembly includes a sealing plate, a spring and a push block, and two sealing plates for sealing the discharge port on the tower body are slidably connected to the tower body, the bottom of the sealing plate is in contact with the top of the guide plate, a spring is connected between the sealing plate and the tower body, and the top of the guide plate is connected to a push block, which is used to push the sealing plate to move upward so that the sealing plate no longer seals the discharge port on the tower body.

[0010] In addition, it is particularly preferred that the loading mechanism includes a screw conveyor, a feed frame and a sealing assembly, screw conveyors are installed on both the front and rear sides of the installation box, the lower part of the screw conveyor is connected to the feed frame, two feed ports are opened on the tower body, the discharge end of the screw conveyor faces the feed port on the tower body, the screw conveyor is used to transport new filler upwards, and the new filler enters the tower body through the feed port on the tower body, and the sealing assembly is used to seal the feed port on the tower body.

[0011] In addition, it is particularly preferred that the sealing assembly includes an electric push rod, a feed pipe and a baffle plate, and the electric push rod is installed on the top of the installation box. The telescopic rod of the electric push rod is connected to the feed pipe, and the feed pipe moves upward to correspond to the discharge end of the screw conveyor. The feed pipe is connected to a baffle plate for sealing the feed port on the tower body, and the baffle plate is in contact with the tower body.

[0012] In addition, it is particularly preferred that the blocking mechanism includes a slide plate, a blocking net and a screw motor, the slide plates are slidably connected in the installation box, the slide plates are connected to blocking nets for blocking the fillers in the tower body, the slide plates are opened with discharge holes, and the installation box is installed with a screw motor, the screw of the screw motor and the slide plate are threadedly connected to drive the slide plate to move so that the discharge hole and the tower body correspond.

[0013] In addition, it is particularly preferred that a diffusion box is further included, the lower end of the waste liquid pipe is connected to the diffusion box, and circular holes are evenly spaced at the bottom of the diffusion box.

[0014] In addition, it is particularly preferred that a diffusion plate is further included, the tower body is connected with the diffusion plate, and the diffusion plate has through holes evenly spaced apart.

[0015] In addition, it is particularly preferred that a support block is further included, and the tower body is connected with the support block. When the material guide plate moves into the tower body, the support block supports the material guide plate.

[0016] In addition, it is particularly preferred that a material guide frame is further included, and the frame is connected with the material guide frame, and the old filler will fall into the material guide frame along the material guide plate.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention can inject chemical waste liquid into the tower body through the waste liquid pipe, and can inject high-boiling point solvent into the tower body through the solvent pipe, so as to break the original azeotropic condition and change the relative volatility between components, thereby realizing distillation separation. The filler can be transported upward by the screw conveyor and transported into the tower body for loading. The slide plate can be driven to move rightward by the screw motor so that the discharge hole and the tower body correspond. The old filler falls onto the material guide plate through the discharge hole and rolls to the left for discharge. The filler can be automatically cleaned and replaced, which can save manpower and material resources and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0019] Figure 2 A three-dimensional structural schematic diagram of the hot air pipe and the heater of the present invention is shown.

[0020] Figure 3 A first cross-sectional view of the installation box and the tower body of the present invention is shown.

[0021] Figure 4 A three-dimensional structural schematic diagram of the hot air box and the diffusion nozzle of the present invention is shown.

[0022] Figure 5 The three-dimensional structural schematic diagram of the unloading mechanism of the present invention is shown.

[0023] Figure 6 A cross-sectional view of a guide frame of the present invention is shown.

[0024] Figure 7 A second cross-sectional view of the installation box and the tower body of the present invention is shown.

[0025] Figure 8 A three-dimensional structural schematic diagram of the sealing plate and the spring of the present invention is shown.

[0026] Fig. 9 The three-dimensional structural schematic diagram of the material guide plate, the blocking plate, the spring and the push block of the present invention is shown.

[0027] Fig.10 The three-dimensional structural schematic diagram of the charging mechanism of the present invention is shown.

[0028] Fig.11 A three-dimensional structural schematic diagram of the blocking mechanism of the present invention is shown.

[0029] Fig.12 A cross-sectional view of a mounting box of the present invention is shown.

[0030] Fig.13 A third cross-sectional view of the installation box and the tower body of the present invention is shown.

[0031] Fig.14 A three-dimensional structural schematic diagram of the diffusion box and the circular hole of the present invention is shown.

[0032] Fig.15 A three-dimensional structural schematic diagram of the diffusion plate and the through hole of the present invention is shown.

[0033] In the figure: 1. frame; 2. installation box; 3. tower body; 4. waste liquid pipe; 5. solvent pipe; 6. hot air pipe; 7. hot air box; 8. diffusion nozzle; 9. heater; 101. guide frame; 102. sliding frame; 103. cylinder; 104. guide plate; 105. guide plate; 106. blocking plate; 107. spring; 108. push block; 111. screw conveyor; 112. feed frame; 113. electric push rod; 114. feed pipe; 115. baffle plate; 121. slide plate; 122. baffle net; 123. discharge hole; 124. screw motor; 131. diffusion box; 132. round hole; 141. diffusion plate; 142. through hole; 15. support block; 16. guide frame. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Reference Figure 1-Figure 12 A solvent distillation device for treating chemical waste liquid comprises a frame 1, an installation box 2, a tower body 3, a waste liquid pipe 4, a solvent pipe 5, a hot air pipe 6, a hot air box 7, a diffusion nozzle 8, a heater 9, a discharging mechanism, a loading mechanism and a blocking mechanism. Two installation boxes 2 are connected to the upper part of the frame 1 by bolts. The two installation boxes 2 are arranged opposite to each other up and down. The tower body 3 is installed on the two installation boxes 2, and the installation boxes 2 and the tower body 3 are connected. The upper right part of the tower body 3 is connected to the waste liquid pipe 4, and the top of the waste liquid pipe 4 is connected to the solvent pipe 5. The lower right part of the tower body 3 is connected to the hot air pipe 6, and the upper end of the hot air pipe 6 is connected to the hot air box 7. The hot air box 7 is located in the tower body 3. Diffusor nozzles 8 are evenly spaced at the top of 7. The diffuser nozzles 8 are evenly spaced so that the hot air can be evenly distributed inside the tower body 3. There are check valves in the diffuser nozzles 8. Under the action of the check valve, the hot air in the hot air box 7 can be sprayed out through the diffuser nozzles 8, and the liquid cannot enter the hot air box 7 through the diffuser nozzles 8. Four heaters 9 are evenly spaced at the lower part of the tower body 3. The four heaters 9 surround the lower part of the tower body 3, which can make the lower part of the tower body 3 heated more evenly. The unloading mechanism is used to discharge the old filler in the tower body 3, the loading mechanism is used to load the new filler into the tower body 3, and the blocking mechanism is used to block the filler in the tower body 3.

[0037] Reference Figure 5-Figure 9The unloading mechanism includes a guide frame 101, a sliding frame 102, a cylinder 103, a guide plate 104, a guide plate 105 and a blocking assembly. The bottom of the installation box 2 is connected to the guide frame 101 by bolts, the guide frame 101 is connected to the tower body 3, the bottom of the guide frame 101 is slidably connected to the sliding frame 102, the front side of the guide frame 101 is installed with a cylinder 103 by bolts, the telescopic rod of the cylinder 103 is connected to the sliding frame 102, the top of the sliding frame 102 is connected to the guide plate 104, the guide plate 104 is located in the guide frame 101, and the guide plate 104 is located in the guide frame 101. The plate 104 is tilted so that the filler can roll to the left better along the guide plate 104. Guide plates 105 are connected to the front and rear sides of the bottom of the guide frame 101. The right side of the guide plate 105 is connected to the left side of the tower body 3. The guide plate 105 can guide the guide plate 104 to make the guide plate 104 move more smoothly. Discharge ports are opened on the upper and lower sides of the left side of the tower body 3. The guide plate 104 is located in this discharge port, and the guide plate 104 can enter the tower body 3 through this discharge port. The sealing component is used to seal the discharge port on the tower body 3.

[0038] Reference Figure 6 , Figure 8 and Fig. 9 The blocking assembly includes a blocking plate 106, a spring 107 and a push block 108. The upper and lower sides of the left side of the tower body 3 are slidably connected with the blocking plate 106. The bottom of the blocking plate 106 is in contact with the top of the guide plate 104. Four springs 107 are connected between the top of the blocking plate 106 and the tower body 3. The middle of the top of the guide plate 104 is connected with a push block 108, and the top of the push block 108 is an inclined surface.

[0039] Reference Fig.10 The loading mechanism includes a screw conveyor 111, a feed frame 112 and a sealing assembly. The screw conveyor 111 is installed on both the front and rear sides of the installation box 2 by bolts. The lower part of the screw conveyor 111 is connected to the feed frame 112. The feed frame 112 is inclined so that the filler can better roll into the screw conveyor 111 along the feed frame 112. Feed ports are opened on both the front and rear sides of the tower body 3. The discharge end of the screw conveyor 111 faces the feed port on the tower body 3. The sealing assembly is used to seal the feed port on the tower body 3.

[0040] Reference Fig.10 The sealing assembly includes an electric push rod 113, a feed pipe 114 and a baffle plate 115. The electric push rod 113 is installed on the top of the installation box 2 by bolts. The feed pipe 114 is connected to the telescopic rod of the electric push rod 113. The feed pipe 114 moves upward to correspond to the discharge end of the screw conveyor 111. The feed pipe 114 is connected to the baffle plate 115, and the baffle plate 115 is in contact with the tower body 3.

[0041] Reference Fig.11 and Fig.12The blocking mechanism includes a slide plate 121, a blocking net 122 and a screw motor 124. The slide plates 121 are slidably connected in the installation box 2, the blocking net 122 is connected to the right part of the slide plate 121, and the left part of the slide plate 121 is provided with a discharge hole 123. The front side of the installation box 2 is installed with a screw motor 124, and the screw of the screw motor 124 and the slide plate 121 are connected by threads.

[0042] In the initial state, the baffle plate 115 seals the feed port on the tower body 3. The staff can control the extension of the telescopic rod of the electric push rod 113 to drive the guide plate 104 and the baffle plate 115 to move upward. The feed pipe 114 moves upward to correspond to the discharge end of the screw conveyor 111. At this time, the baffle plate 115 no longer seals the feed port on the tower body 3, and the feed pipe 114 corresponds to the feed port on the tower body 3. Then the filler is poured into the feed frame 112, and the filler rolls along the feed frame 112 into the screw conveyor 111. The screw conveyor 111 transports the filler upward, and the filler enters the feed pipe 114 through the discharge end of the screw conveyor 111. Then the filler falls onto the baffle 122 through the feed pipe 114 and the feed port on the tower body 3. Loading is carried out, and the baffle 122 can block the filler. After the loading is completed, the screw conveyor 111 is closed, and then the telescopic rod of the electric push rod 113 is controlled to shorten, driving the guide plate 104 and the baffle plate 115 to move downward, the feed pipe 114 and the discharge end of the screw conveyor 111 are staggered, and the baffle plate 115 re-seals the feed port on the tower body 3. The staff then injects the chemical waste liquid into the tower body 3 through the waste liquid pipe 4, and injects a high-boiling point solvent (such as an extractant. Selecting a suitable extractant can significantly change the volatility of the target component and is easy to recycle and reuse) into the tower body 3 through the solvent pipe 5, breaking the original azeotropic condition and changing the relative volatility between the components, thereby realizing distillation separation, and the liquid phase falls from the top of the tower body 3 to the filler. The liquid phase can fall down through the baffle 122, and the hot air pipe 6 is connected to the hot air pump. The hot air enters the hot air box 7 through the hot air pipe 6 and is sprayed out through the diffusion nozzle 8. The diffusion nozzle 8 can diffuse the hot air so that the hot air can be evenly distributed inside the tower body 3. The gas phase flows upward from the bottom of the tower body 3. The gas phase and the liquid phase are in full contact on the surface of the filler. The filler can provide a large amount of gas-liquid contact area, so that the mass transfer process is carried out efficiently. Different components in the solvent evaporate and condense at the gas-liquid interface. The lighter components are more likely to evaporate into the gas phase, while the heavier components are retained in the liquid phase, thereby achieving separation. The gas phase is discharged from the top of the tower body 3, and the liquid phase is discharged from the bottom of the tower body 3. A condenser can be set at the top of the tower body 3 to cool the gas phase into liquid and then collect it. The device 9 can heat the bottom of the tower body 3 to determine the best operating temperature to ensure that the heavy components are fully evaporated. In the initial state, the telescopic rod of the cylinder 103 is in an extended state. When the filler in the tower body 3 needs to be replaced, the telescopic rod of the cylinder 103 is controlled to shorten, driving the sliding frame 102 to move to the right, and the sliding frame 102 drives the guide plate 104 to move to the right. The guide plate 104 will move into the tower body 3, and the guide plate 104 moves to the right and drives the push block 108 to move to the right. The inclined surface on the push block 108 can push the blocking plate 106 to move upward, and the spring 107 is compressed. The blocking plate 106 no longer blocks the discharge port on the tower body 3, and then the screw motor 124 is controlled to drive the slide plate 121 and the baffle 122 to move to the right, so that the baffle 122 and the tower body 3 are staggered.The discharge hole 123 is aligned with the tower body 3, and the old filler falls onto the guide plate 104 through the discharge hole 123. Then the old filler rolls to the left along the guide plate 104 and the guide frame 101. The automatic cleaning and replacement of filler can save manpower and material resources and improve safety. After all the old filler is discharged, the screw motor 124 is controlled to drive the baffle 122 to move to the left, so that the baffle 122 and the tower body 3 correspond, and the discharge hole 123 and the tower body 3 are staggered, and then new filler is added.

[0043] Reference Fig.13 and Fig.14 , and also includes a diffusion box 131. The lower end of the waste liquid pipe 4 is connected to the diffusion box 131. The bottom of the diffusion box 131 has circular holes 132 evenly spaced apart. Chemical waste liquid and solvent will enter the diffusion box 131, and the liquid will be discharged through the circular holes 132. The circular holes 132 are evenly spaced apart to ensure that the liquid can be evenly distributed on the filler to avoid channeling.

[0044] Reference Fig.12 and Fig.15 , and also includes a diffuser plate 141. The middle and lower parts of the tower body 3 are connected to the diffuser plate 141. The diffuser plate 141 is evenly spaced with through holes 142. The liquid will fall onto the diffuser plate 141 and be discharged through the through holes 142. The through holes 142 are evenly spaced to ensure that the liquid can be evenly distributed on the filler to avoid channeling.

[0045] Reference Figure 7 , also includes a support block 15, the upper and lower sides of the right side of the tower body 3 are connected with the support block 15, when the guide plate 104 moves to the right into the tower body 3, the bottom of the guide plate 104 will contact the top of the support block 15, the support block 15 can support the guide plate 104, and improve the stability of the guide plate 104.

[0046] Reference Figure 1 , also includes a material guide frame 16. The upper and lower sides of the left side of the frame 1 are connected with the material guide frame 16 by bolts. The old filler will roll to the left along the guide plate 104 and the guide frame 101 into the material guide frame 16. The material guide frame 16 can gather the old filler for subsequent collection.

[0047] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. They only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention.

[0048] It should be pointed out that, for ordinary technicians in this field, several modifications, increases and decreases in quantity, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

Claims

1. A solvent distillation device for treating chemical waste liquid, comprising a frame (1), an installation box (2) and a tower body (3), wherein two installation boxes (2) are connected to the frame (1), the tower body (3) is installed on the two installation boxes (2), and the installation boxes (2) and the tower body (3) are in communication, characterized in that: The tower body (3) further comprises a waste liquid pipe (4), a solvent pipe (5), a hot air pipe (6), a hot air box (7), a diffusion nozzle (8), a heater (9), a discharge mechanism, a loading mechanism and a blocking mechanism. The upper part of the tower body (3) is connected to the waste liquid pipe (4), the top of the waste liquid pipe (4) is connected to the solvent pipe (5), the lower part of the tower body (3) is connected to the hot air pipe (6), the hot air box (7) is connected to the hot air pipe (6), the hot air box (7) is located in the tower body (3), the top of the hot air box (7) is equipped with a diffusion nozzle (8), and a one-way valve is arranged in the diffusion nozzle (8). The lower part of the tower body (3) is equipped with a heater (9), the discharge mechanism is used to discharge the old filler in the tower body (3), the loading mechanism is used to load the new filler into the tower body (3), and the blocking mechanism is used to block the filler in the tower body (3).

2. A solvent distillation device for treating chemical waste liquid according to claim 1, characterized in that: The unloading mechanism comprises a guide frame (101), a sliding frame (102), a cylinder (103), a material guide plate (104), a guide plate (105) and a blocking assembly. The bottom of the installation box (2) is connected to the guide frame (101), the guide frame (101) is connected to the tower body (3), the bottom of the guide frame (101) is slidably connected to the sliding frame (102), the guide frame (101) is installed with a cylinder (103), the telescopic rod of the cylinder (103) is connected to the sliding frame (102), the top of the sliding frame (102) is connected to the material guide plate (104), and the guide frame (101) is connected to the guide frame (104). The plate (104) is located in the guide frame (101), and the guide frame (101) is connected with a guide plate (105) for guiding the guide plate (104). The guide plate (105) is connected to the tower body (3), and two discharge ports are opened on the tower body (3). The guide plate (104) is located in the discharge ports, and the guide plate (104) can enter the tower body (3) through the discharge ports. Old fillers in the tower body (3) will fall onto the guide plate (104) and be discharged through the guide plate (104). The blocking component is used to seal the discharge ports on the tower body (3).

3. A solvent distillation device for treating chemical waste liquid according to claim 2, characterized in that: The blocking component comprises a blocking plate (106), a spring (107) and a push block (108); two blocking plates (106) for sealing a material outlet on the tower body (3) are slidably connected to the tower body (3); the bottom of the blocking plate (106) contacts the top of the material guide plate (104); a spring (107) is connected between the blocking plate (106) and the tower body (3); the top of each material guide plate (104) is connected to a push block (108); the push block (108) is used to push the blocking plate (106) to move upwards so that the blocking plate (106) no longer blocks the material outlet on the tower body (3).

4. A solvent distillation device for treating chemical waste liquid according to claim 3, characterized in that: The loading mechanism comprises a screw conveyor (111), a feed frame (112) and a sealing assembly. The screw conveyors (111) are installed on both the front and rear sides of the installation box (2). The lower part of the screw conveyor (111) is connected to the feed frame (112). Two feed ports are opened on the tower body (3). The discharge end of the screw conveyor (111) faces the feed port on the tower body (3). The screw conveyor (111) is used to convey new fillers upwards. The new fillers enter the tower body (3) through the feed port on the tower body (3). The sealing assembly is used to seal the feed port on the tower body (3).

5. A solvent distillation device for treating chemical waste liquid according to claim 4, characterized in that: The sealing assembly comprises an electric push rod (113), a feed pipe (114) and a baffle plate (115). The top of the installation box (2) is equipped with an electric push rod (113). The telescopic rod of the electric push rod (113) is connected to the feed pipe (114). The feed pipe (114) moves upward to correspond to the discharge end of the screw conveyor (111). The feed pipe (114) is connected to a baffle plate (115) for sealing the feed port on the tower body (3). The baffle plate (115) is in contact with the tower body (3).

6. A solvent distillation device for treating chemical waste liquid according to claim 5, characterized in that: The blocking mechanism comprises a slide plate (121), a blocking net (122) and a screw motor (124); the slide plates (121) are slidably connected in the installation box (2); the slide plates (121) are connected to the blocking net (122) for blocking the filler in the tower body (3); the slide plates (121) are provided with a discharge hole (123); the screw motor (124) is installed in the installation box (2); the screw of the screw motor (124) and the slide plate (121) are connected by threads to drive the slide plate (121) to move so that the discharge hole (123) and the tower body (3) correspond to each other.

7. A solvent distillation device for treating chemical waste liquid according to claim 6, characterized in that: It also comprises a diffusion box (131), the lower end of the waste liquid pipe (4) is connected to the diffusion box (131), and the bottom of the diffusion box (131) is provided with circular holes (132) evenly spaced apart.

8. A solvent distillation device for treating chemical waste liquid according to claim 7, characterized in that: It also comprises a diffusion plate (141), the diffusion plate (141) is connected inside the tower body (3), and through holes (142) are evenly spaced on the diffusion plate (141).

9. A solvent distillation device for treating chemical waste liquid according to claim 8, characterized in that: It also includes a support block (15), which is connected to the tower body (3). When the material guide plate (104) moves into the tower body (3), the support block (15) supports the material guide plate (104).

10. A solvent distillation device for treating chemical waste liquid according to claim 9, characterized in that: It also includes a material guide frame (16), which is connected to the frame (1), and the old filler will fall into the material guide frame (16) along the material guide plate (104).

Images