Toluene recovery solvent separation and filtration equipment for vitamin H production

Abstract

The invention provides toluene recovery solvent separation and filtration equipment for vitamin H production, which belongs to the technical field of vitamin H production. The equipment comprises a distillation tower, wherein a reboiler and a feed filter mechanism are provided on the left side of the distillation tower, and the reboiler is provided below the feed filter mechanism. The upper end of the distillation tower is connected to a condenser through a gas discharge pipe, the right side of the condenser is connected to a buffer tank through a connecting pipe, the lower end of the buffer tank is connected to a stratifier through a discharge pipe, a sampling mechanism is provided on the left side of the stratifier, and a buffer plate is provided on the right inner top wall of the stratifier. The feed filter mechanism can filter toluene waste liquid entering the interior of a filter box, so that solid impurities are screened out, and then flow to the left into a collection box through the vibration screen of the filter plate and the guide plate, thereby preventing impurities from continuously accumulating and clogging filter holes of the filter plate, reducing the number of cleaning times of the filter plate, and improving the filtration efficiency of the toluene waste liquid.

Description

Technical Field

[0001] The invention belongs to the technical field of vitamin H production, and in particular relates to toluene recovery solvent separation and filtration equipment for vitamin H production. Background Art

[0002] Vitamin H, also known as d-biotin and coenzyme R, is a water-soluble vitamin and also belongs to the B vitamins, B7. It is an indispensable substance for the normal metabolism of fat and protein, and is also a necessary nutrient for maintaining the natural growth, development and normal health of the human body. Toluene is a commonly used organic solvent in the pharmaceutical field, but it is a Class II drug and is carcinogenic to animals. Therefore, toluene waste solvent should be recycled to avoid pollution to the environment. Toluene needs to be used many times in the production process of vitamin H. During the production process, the toluene waste liquid generated needs to be recycled and treated to avoid pollution to the environment. It can also be recycled and reused in part to reduce the cost of use.

[0003] In the prior art, when toluene waste liquid is separated and filtered inside a distillation tower, it has the following defects:

[0004] 1. Generally, only one set of filter plates is set at the feed inlet of the distillation tower to filter out impurities in the toluene waste liquid. When there are many solid impurities in the toluene waste liquid, the impurities will gradually accumulate and adhere to the filter plates, causing blockage of the filter plates. This will make it impossible to continue the toluene recovery work and require the machine to be shut down to clean the filter plates, affecting the overall work efficiency.

[0005] 2. There is no sampling or detection mechanism inside the stratifier. Only after the toluene is stratified and the stratified liquid is gradually discharged and collected from the discharge port, can it be detected whether the toluene meets the standards. The toluene that meets the standards will be recycled, and the toluene that does not meet the standards will be re-fed into the distillation tower through the feed port for recycling. The operation steps are cumbersome and inefficient.

[0006] Therefore, we propose toluene recovery solvent separation and filtration equipment for vitamin H production to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem that only one set of filter plates is generally provided at the feed inlet of the existing distillation tower to filter impurities from toluene waste liquid. When there are many solid impurities in the toluene waste liquid, the impurities will gradually accumulate and adhere to the filter plates, causing blockage of the filter plates, resulting in the inability to carry out toluene recovery work continuously, and the filter plates need to be stopped and cleaned, affecting the overall work efficiency; no sampling or detection mechanism is provided inside the demixer, and only after the toluene is demixed and the demixed liquid is gradually discharged and collected from the discharge port can it be detected whether the toluene meets the standards. The toluene that meets the standards is recycled and reused, and the toluene that does not meet the standards is re-fed into the distillation tower through the feed inlet for recovery. The operation steps are cumbersome and the efficiency is low. A toluene recovery solvent separation and filtration device for vitamin H production is proposed.

[0008] The object of the present invention can be achieved by the following technical solution: comprising a distillation tower, a reboiler and a feed filter mechanism are provided on the left side of the distillation tower, and the reboiler is provided below the feed filter mechanism, the upper end of the distillation tower is connected to a condenser through a gas discharge pipe, the right side of the condenser is connected to a buffer tank through a connecting pipe, the lower end of the buffer tank is connected to a stratifier through a discharge pipe, a sampling mechanism is provided on the left side of the stratifier, a buffer plate is provided on the right inner top wall of the stratifier, and the discharge port of the discharge pipe is directly opposite to the buffer plate;

[0009] The filter mechanism includes a filter box, and the filter box is fixedly mounted on the left outer wall of the distillation tower through a mounting plate. A feed inlet is provided at the right end of the upper surface of the filter box, and a filter plate is movably connected to the interior of the filter box through a hinge block. A guide plate is abutted against the lower left end of the filter plate, and the guide plate is hinged to the left end of the filter box through a hinge shaft. A collecting box is provided on the left side of the guide plate, and the collecting box is fixedly mounted on the left wall of the filter box by bolts. A servo motor is provided on the right outer wall of the filter box, and the power output end of the servo motor is transmission-connected to a rotating shaft. Cam one and cam two are provided on the circumferential surface of the left side of the rotating shaft, and the cam two is provided on the left side of the cam one. A hollow connecting plate is provided on the circumferential surface of the cam one, and the raised end of the cam one abuts against the lower end of the hollow connecting plate. The upper end of the hollow connecting plate is connected to the lower end of the filter plate, and the raised end of the cam two abuts against the lower right end of the guide plate.

[0010] As a preferred embodiment of the present invention, baffles are provided on the front, rear and right sides of the upper surface of the filter plate, and the lower end of the feed port passes through the filter box and extends to above the right end of the filter plate.

[0011] As a preferred embodiment of the present invention, an impurity outlet is provided on the left side wall of the filter box, the middle part of the guide plate is arranged inside the impurity outlet, the left end of the guide plate is arranged above the inside of the collecting box, the right side wall of the collecting box is abutted against the left outer wall of the filter box through a sealing gasket, and a feed pipe is provided in the middle part of the lower end of the filter box, and the lower end of the feed pipe is inserted into the left side interior of the distillation tower.

[0012] As a preferred embodiment of the present invention, the sampling mechanism includes an electric lifting rod, and the electric lifting rod is arranged on the right outer wall of the distillation tower, a connecting block is provided at the upper end of the electric lifting rod, a splint one is provided on the right side of the connecting block, a splint two is connected to the right side of the splint one through a plug-in plate, a separating funnel is clamped between the splint one and the splint two, a rotating rod is provided inside the upper end of the plug-in plate, and the circumferential surface of the rotating rod is clamped to the inside of the plug-in plate through a clamping block.

[0013] As a preferred embodiment of the present invention, a slot one is opened inside the splint one, the plug-in board is plugged into the inside of the slot one, the lower end of the plug-in board abuts against an abutment block one, the lower end of the abutment block one is provided with a spring one, and the spring one and the abutment block one are both provided inside the lower end of the slot one.

[0014] As a preferred embodiment of the present invention, a slot two is opened inside the upper end of the splint one, the left end of the rotating rod is inserted into the inside of the slot two, the right end of the rotating rod passes through the splint two and is connected to the knob, the left end of the rotating rod abuts against the abutment block two, and the left end of the abutment block two is provided with a spring two, and both the spring two and the abutment block two are arranged inside the slot two.

[0015] As a preferred embodiment of the present invention, a movable groove is provided inside the upper end of the second splint and the plug-in board, the longitudinal width of the movable groove matches the card block, a rotating groove is provided inside the plug-in board, and the rotating groove is connected to the movable groove inside the plug-in board, the lateral width of the rotating groove is the same as the card block, and the card block is arranged inside the rotating groove.

[0016] As a preferred embodiment of the present invention, a movable through groove is opened on the left side of the upper end of the delamination device, the overall diameter of the splint one and the splint two matches the movable through groove, the lower ends of the splint one and the splint two can be sealed and inserted into the movable through groove through a sealing ring, and a transparent window is provided on the front of the delamination device.

[0017] As a preferred embodiment of the present invention, a liquid pump is provided at the rear lower end of the stratifier, the front end of the liquid pump is connected to the interior of the lower end of the stratifier through a liquid pumping pipe, and the upper end of the liquid pump is connected to the interior of the distillation tower through a liquid outlet pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Through the provided feed filter mechanism, the toluene waste liquid entering the filter box can be filtered, so that solid impurities are screened out, and then flow to the left into the collection box through the vibration screen of the filter plate and the guide plate, thereby preventing impurities from continuously accumulating and clogging the filter holes of the filter plate, reducing the number of times the filter plate is cleaned, and improving the filtration efficiency of the toluene waste liquid;

[0020] (2) Through the sampling mechanism, a certain amount of toluene layered liquid can be accumulated inside the stratifier, and then sampling can be performed. Then, according to the detection results, the layered liquid can be collected, or the liquid inside the stratifier can be pumped back into the distillation tower through the liquid pump. The operation is simpler, faster and more practical.

[0021] (3) By setting up a buffer tank, after a certain amount of stratified liquid is accumulated in the stratifier, the valve of the discharge pipe can be closed, so that the subsequent condensed liquid is temporarily stored in the buffer tank. At the same time, the liquid inside the stratifier is allowed to stand for stratification. After it is gradually discharged and collected, the valve of the discharge pipe is opened to carry out the discharge work. Through the buffer plate set up, the condensed liquid discharged from the discharge pipe slowly falls into the stratifier through the buffer plate, avoiding large vibration inside the stratifier. When the stratifier is collecting liquid, the stratification work can also be carried out, thereby improving the efficiency of subsequent static stratification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention;

[0024] Figure 2 is a schematic diagram of a second three-dimensional structure of the present invention;

[0025] Figure 3 It is a front cutaway perspective view of the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified view of the structure at point A;

[0027] Figure 5 It is a partial three-dimensional structural diagram of the feed filter mechanism of the present invention;

[0028] Figure 6 Schematic diagram of the three-dimensional structure of the sampling mechanism of the present invention;

[0029] Figure 7 It is a front sectional perspective view of the lower ends of the first and second splints of the present invention;

[0030] Figure 8 It is a front sectional perspective view of the upper ends of the first and second splints of the present invention;

[0031] Figure 9 It is a right side cutaway perspective view of the upper ends of the first and second splints of the present invention.

[0032] Figure 1: Distillation column; 2: Reboiler; 3: Feed filter mechanism; 301: Filter box; 302: Feed port; 303: Joint block; 304: Filter plate; 305: Baffle; 306: Guide plate; 307: Collecting box; 308: Servo motor; 309: Rotating shaft; 310: Cam 1; 311: Cam 2; 312: Hollow connecting plate; 313: Sealing gasket; 4: Condenser; 5: Buffer tank; 6: Separator; 7: Sampling mechanism; 701: Electric lift rod; 702: Connecting block; 703: Clamping plate 1 ; 704, splint two; 705, separating funnel; 706, plug-in board; 707, slot one; 708, spring one; 709, abutment block one; 710, slot two; 711, spring two; 712, abutment block two; 713, rotating rod; 714, movable slot; 715, rotating slot; 716, blocking block; 717, movable through slot; 8, feed pipe; 9, gas discharge pipe; 10, connecting pipe; 11, discharge pipe; 12, transparent window; 13, buffer plate; 14, liquid pump; 15, liquid pumping pipe; 16, liquid discharge pipe. DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0034] See also Figure 1 - Figure 9 As shown, a toluene recovery solvent separation and filtration device for vitamin H production comprises a distillation tower 1, a reboiler 2 and a feed filtering mechanism 3 are provided on the left side of the distillation tower 1, and the reboiler 2 is provided below the feed filtering mechanism 3, the upper end of the distillation tower 1 is connected to a condenser 4 through a gas discharge pipe 9, the right side of the condenser 4 is connected to a buffer tank 5 through a connecting pipe 10, the lower end of the buffer tank 5 is connected to a stratifier 6 through a discharge pipe 11, a sampling mechanism 7 is provided on the left side of the stratifier 6, a buffer plate 13 is provided on the right inner top wall of the stratifier 6, and a discharge port of the discharge pipe 11 is directly opposite to the buffer plate 13, a liquid pump 14 is provided at the lower end of the rear side of the stratifier 6, the front end of the liquid pump 14 is connected to the interior of the lower end of the stratifier 6 through a liquid pumping pipe 15, and the upper end of the liquid pump 14 is connected to the interior of the distillation tower 1 through a liquid discharge pipe 16;

[0035] The feed filtering mechanism 3 includes a filter box 301, and the filter box 301 is fixedly installed on the left outer wall of the distillation tower 1 through a mounting plate, and a feed port 302 is provided at the right end of the upper surface of the filter box 301, and the interior of the filter box 301 is movably connected to a filter plate 304 through a hinge block 303, and a guide plate 306 is abutted below the left end of the filter plate 304, and the guide plate 306 is hinged to the left end of the filter box 301 through a hinge shaft, and a collection box 307 is provided on the left side of the guide plate 306, and the collection box 307 is fixedly installed on the left side wall of the filter box 301 by bolts, so that the collection box 307 is easy to disassemble and assemble, and then easy to process the collected impurities, so as to avoid the collection box 307 being filled with impurities and affecting the filtration efficiency of the filter plate 304. The right outer wall of the filter box 301 is provided with a servo The motor 308 and the power output end of the servo motor 308 are connected to the rotating shaft 309 through a coupling transmission. The circumferential surface of the left side of the rotating shaft 309 is provided with a cam 1 310 and a cam 2 311, and the cam 2 311 is provided on the left side of the cam 1 310. The circumferential surface of the cam 1 310 is provided with a hollow connecting plate 312, and the raised end of the cam 1 310 abuts against the inner part of the lower end of the hollow connecting plate 312, and the upper end of the hollow connecting plate 312 is connected to the lower end of the filter plate 304. The raised end of the cam 2 311 abuts against the lower end of the right side of the guide plate 306. When the raised end of the cam 2 311 is not in contact with the guide plate 306, the guide plate 306 is also in a state of high right and low left, so that the solid impurities falling on the guide plate 306 can be smoothly guided to the inside of the collection box 307.

[0036] It should be noted that the raised ends of cam 1 310 and cam 2 311 are designed in reverse, that is, when the raised end of cam 1 310 is located directly below, the raised end of cam 2 311 is located directly above, so that when cam 1 310 and cam 2 311 rotate, the raised end of cam 1 310 drives the left end of the hollow connecting plate 312 and the filter plate 304 to move downward, and the raised end of cam 2 311 drives the right end of the guide plate 306 to move upward, and then the right end of the guide plate 306 collides with the left end of the filter plate 304, generating stronger vibration, so that the solid impurities on the filter plate 304 and the guide plate 306 are subjected to more violent vibration, and then are guided and transported more smoothly on the left side, so that the impurities can stably enter the interior of the collection box 307.

[0037] Baffles 305 are provided on the front and rear sides and the right side of the upper surface of the filter plate 304. The lower end of the feed port 302 passes through the filter box 301 and extends to the top of the right end of the filter plate 304. An impurity outlet is provided on the left wall of the filter box 301. The middle part of the guide plate 306 is arranged inside the impurity outlet to provide space for the movement of the guide plate 306, so that the guide plate 306 can smoothly rotate in a small range, avoiding the guide plate 306 from being stationary, so that solid impurities are stationary on the guide plate 306. The left end of the guide plate 306 is arranged in the collection box Above the interior of 307, the right side wall of the collecting box 307 abuts against the left outer wall of the filter box 301 through a sealing gasket 313. The provision of the sealing gasket 313 makes the connection between the filter box 301 and the collecting box 307 tighter, thereby preventing toluene gas from leaking through the connection between the filter box 301 and the collecting box 307. A feed pipe 8 is provided in the middle of the lower end of the filter box 301, and the lower end of the feed pipe 8 is inserted into the left interior of the distillation tower 1, so that the toluene waste liquid after the impurities are filtered can smoothly enter the interior of the distillation tower 1 through the feed pipe 8;

[0038] It should be noted that the lower end of the feed pipe inside the feed port 302 is located above the filter plate 304, which is relatively close to the filter plate 304. At the same time, the filter plate 304 will not contact the lower end of the feed pipe when it vibrates, and the discharge port of the feed pipe is lower than the height of the baffle 305, so that after the toluene waste liquid enters the filter box 301, the liquid will not splash, thereby avoiding the liquid splashing out from the upper end of the baffle 305 and affecting the filtration quality. Example 2

[0039] Please refer to Figure 6 - Figure 9 As shown, the sampling mechanism 7 includes an electric lifting rod 701, and the electric lifting rod 701 is arranged on the right outer wall of the distillation tower 1. A connecting block 702 is provided on the upper end of the electric lifting rod 701. A clamping plate 1 703 is provided on the right side of the connecting block 702. A clamping plate 2 704 is plugged into the right side of the clamping plate 1 703 through a plug-in plate 706. A separating funnel 705 is clamped between the clamping plate 1 703 and the clamping plate 2 704, so that the separating funnel 705 can be installed between the clamping plate 1 703 and the clamping plate 706. The first and second splints 703 and 704 are connected to each other, and when the first and second splints 703 and 704 move vertically, the separating funnel 705 is smoothly driven to move vertically. A rotating rod 713 is provided inside the upper end of the plug-in plate 706. The circumferential surface of the rotating rod 713 is clamped to the inside of the plug-in plate 706 through a clamping block 716. The clamping setting of the clamping block 716 makes the connection between the first and second splints 703 and 704 fast and convenient, with high stability. At the same time, no additional tools are required for disassembly and assembly, which makes it more convenient to use.

[0040] When the locking cam 708 is in the unlocking state, the locking cam 708 is in the unlocking state, and the locking cam 708 is in the unlocking state, so that the locking cam 708 is locked.

[0041] The second slot 710 is provided inside the upper end of the splint 1 703, and the left end of the rotating rod 713 is inserted into the interior of the second slot 710. The right end of the rotating rod 713 passes through the splint 2 704 and is connected to the knob. The left end of the rotating rod 713 abuts against the abutment block 2 712, and the left end of the abutment block 2 712 is provided with a spring 2 711. The spring 2 711 and the abutment block 2 712 are both provided inside the second slot 710. The setting of the second slot 710 enables the left end of the rotating rod 713 to be inserted into the interior of the first slot 707, thereby connecting the rotating rod 713 to the splint 1 703, and providing the spring 2 711 and the abutment block 2 712 with a force. Horizontal movement space, wherein, after the plug board 706 is inserted into the slot 1 707, the spring 1 708 can be pressed down, so that the spring 1 708 exerts an upward reaction force, thereby making the plug board 706 fit more tightly with the rotating rod 713. At the same time, the spring 2 711 is pressed by the rotating rod 713, exerting a lateral reaction force on the rotating rod 713, so that the rotating rod 713 and the block 716 fit more tightly with the plug board 706, so that the rotating rod 713 is stably installed inside the clamping plate 1 703, the plug board 706 and the clamping plate 2 704, thereby connecting and fixing the clamping plate 1 703, the plug board 706 and the clamping plate 2 704;

[0042] The upper ends of the second clamping plate 704 and the plug board 706 are both provided with a movable groove 714. The longitudinal width of the movable groove 714 matches the card block 716. The plug board 706 is provided with a rotation groove 715, and the rotation groove 715 is connected to the movable groove 714 inside the plug board 706. The transverse width of the rotation groove 715 is the same as that of the card block 716, and the card block 716 is arranged inside the rotation groove 715. The setting of the movable groove 714 provides the card block 716 with horizontal movement space left and right, and the setting of the rotation groove 715 provides the card block 716 with vertical rotation space, so that the rotating rod 713 can drive the card block 716 to move into and be connected to the inside of the plug board 706, or move out from the inside of the plug board 706;

[0043] A movable through slot 717 is provided on the left side of the upper end of the delimiter 6. The overall diameter of the first and second splints 703 and 704 matches the movable through slot 717. The setting of the movable through slot 717 enables the first and second splints 703 and 704 to smoothly drive the separating funnel 705 to move to any height inside the delimiter 6, which is convenient for the sampling work of the separating funnel 705. The lower ends of the first and second splints 703 and 704 can be sealed and plugged into the movable through slot 717 through a sealing ring. The setting of the sealing ring can close the gap at the connection between the first and second splints 703 and the delimiter 6 to prevent toluene volatilization from leaking from the connection and polluting the environment. A transparent window 12 is provided on the front side of the delimiter 6. The setting of the transparent window 12 makes it convenient for the staff to observe the height of the separating funnel 705 through the transparent window 12, which is convenient for the sampling work of the separating funnel 705.

[0044] It should be noted that when the toluene waste liquid recovery is completed, the electric lifting rod 701 is started, and the electric lifting rod 701 drives the connecting block 702 to move upward, so that the splint 1 703, the splint 2 704 and the separating funnel 705 are moved out of the delamination device 6 as a whole, and then the rotating rod 713 is rotated so that the rotating rod 713 drives the card block 716 to rotate flush with the moving groove 714. At this time, the elastic force of the spring 2 711 is released, and the rotating rod 713 is pushed to the right through the abutment block 2 712, and the rotating rod 713 is pulled to move to the right at the same time, so that the left end of the rotating rod 713 is moved out from the inside of the splint 1 703, and then the plug When the connecting plate 706 loses its limiting and fixing effect, the elastic force of spring 1 708 is released, and the plug-in plate 706 is pushed upward for a distance through the abutment block 1 709, so that the plug-in plate 706 and the second splint 704 move upward for a distance, so that the second splint 704 is staggered with the first splint 703, and then the second splint 704 continues to move upward. After the connecting plate 706 is moved out from the inside of the first splint 703 as a whole, the disassembly of the second splint 704 is completed. At this time, the separating funnel 705 can be taken out from the inside of the first splint 703 and the second splint 704, which is convenient for cleaning the separating funnel 705.

[0045] When the present invention is in use, the collected toluene waste liquid is first fed into the interior of the filter box 301 through the feed port 302, and the waste liquid falls on the filter plate 304. The solid impurities are blocked by the filter plate 304, so that the liquid passes through the filter holes and falls into the interior of the lower end of the filter box 301. Then, it flows into the interior of the distillation tower 1 through the feed pipe 8. At the same time, the servo motor 308 is started, and the servo motor 308 drives the rotating shaft 309, the cam 1 310 and the cam 2 311 to rotate. When the raised end of the cam 1 310 abuts against the upper end of the hollow connecting plate 312, it can drive the hollow connecting plate 312 and the left end of the filter plate 304 to rotate. When the cam 310 moves upward, and the raised end of the cam 1 310 contacts the inner bottom end of the hollow connecting plate 312, the left end of the filter plate 304 can be driven to move downward, so that the filter plate 304 can vibrate up and down, and the solid impurities can be shaken off to the left. At the same time, when the raised end of the cam 2 311 contacts the lower right end of the guide plate 306, the guide plate 306 can be driven to move upward, so that the guide plate 306 collides with the filter plate 304, generating greater vibration, and then the impurities can be shaken off more smoothly to the left side into the collection box 307, thereby preventing stubborn impurities from adhering to the filter holes of the filter plate 304 and affecting the filtration efficiency.

[0046] Then, the solution inside the distillation tower 1 is distilled through the reboiler 2, and the distilled gas flows into the condenser 4 through the gas discharge pipe 9, and after cooling and condensing, flows into the interior of the buffer tank 5 through the connecting pipe 10, and then flows into the interior of the stratifier 6 through the discharge pipe 11. When the liquid flows into the interior of the stratifier 6 through the discharge pipe 11, the liquid will hit the buffer plate 13, so that the liquid slowly flows downward into the interior of the stratifier 6 through the buffer plate 13, avoiding the liquid from falling directly into the stratifier 6, generating vibration or splashing, and affecting the liquid inside the stratifier 6. The liquid is automatically separated into layers. After the liquid is collected inside the separator 6 for a period of time, the electric lifting rod 701 is started. The electric lifting rod 701 drives the connecting block 702, the first clamping plate 703 and the second clamping plate 704 to move downward, so that the lower end of the separating funnel 705 contacts the liquid. A portion of the liquid is extracted through the separating funnel 705 for testing. When the toluene quality is found to be unqualified, the liquid extraction pump 14 is started. The liquid extraction pump 14 extracts the liquid inside the separator 6 through the liquid extraction pipe 15 and the liquid outlet pipe 16 back to the inside of the distillation tower 1 for further distillation.

[0047] After the stratifier 6 is filled with liquid, the valve inside the discharge pipe 11 is closed so that the condensate is temporarily stored in the buffer tank 5. After the liquid inside the stratifier 6 is allowed to stand for a period of time, the collected liquid is discharged in layers through the liquid outlet at the lower end of the stratifier 6.

[0048] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A toluene recovery solvent separation and filtration device for vitamin H production, comprising a distillation tower (1), characterized in that: A reboiler (2) and a feed filter mechanism (3) are provided on the left side of the distillation tower (1), and the reboiler (2) is provided below the feed filter mechanism (3); the upper end of the distillation tower (1) is connected to a condenser (4) via a gas discharge pipe (9); the right side of the condenser (4) is connected to a buffer tank (5) via a connecting pipe (10); the lower end of the buffer tank (5) is connected to a stratifier (6) via a discharge pipe (11); a sampling mechanism (7) is provided on the left side of the stratifier (6); a buffer plate (13) is provided on the right inner top wall of the stratifier (6); and the discharge port of the discharge pipe (11) faces the buffer plate (13); The feed filtering mechanism (3) comprises a filter box (301), and the filter box (301) is fixedly mounted on the left outer wall of the distillation tower (1) via a mounting plate, a feed port (302) is provided at the right end of the upper surface of the filter box (301), a filter plate (304) is movably connected to the interior of the filter box (301) via a hinge block (303), a guide plate (306) is abutted below the left end of the filter plate (304), and the guide plate (306) is hinged to the left end of the filter box (301) via a hinge shaft, a collecting box (307) is provided on the left side of the guide plate (306), and the collecting box (307) is fixedly mounted on the left side wall of the filter box (301) via bolts, and the right outer wall of the filter box (301) is provided with a A servo motor (308), wherein the power output end of the servo motor (308) is connected to a rotating shaft (309), and a cam 1 (310) and a cam 2 (311) are provided on the circumferential surface on the left side of the rotating shaft (309), and the cam 2 (311) is provided on the left side of the cam 1 (310), and the raised ends of the cam 1 (310) and the cam 2 (311) are designed in reverse, and a hollow connecting plate (312) is provided on the circumferential surface of the cam 1 (310), and the raised end of the cam 1 (310) is in contact with the inner portion of the lower end of the hollow connecting plate (312), the upper end of the hollow connecting plate (312) is connected to the lower end of the filter plate (304), and the raised end of the cam 2 (311) is in contact with the lower end of the right side of the guide plate (306); Baffles (305) are provided on both the front and rear sides and the right side of the upper surface of the filter plate (304). The lower end of the feed port (302) passes through the filter box (301) and extends to above the right end of the filter plate (304). The discharge port of the feed pipe is lower than the height of the baffle (305).

2. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 1, characterized in that: An impurity outlet is provided on the left side wall of the filter box (301), the middle portion of the guide plate (306) is arranged inside the impurity outlet, the left end of the guide plate (306) is arranged above the inside of the collecting box (307), the right side wall of the collecting box (307) is in contact with the left outer wall of the filter box (301) via a sealing gasket (313), a feed pipe (8) is provided in the middle portion of the lower end of the filter box (301), and the lower end of the feed pipe (8) is plugged into the left inner portion of the distillation tower (1).

3. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 1, characterized in that: The sampling mechanism (7) includes an electric lifting rod (701), and the electric lifting rod (701) is arranged on the right outer wall of the distillation tower (1), the upper end of the electric lifting rod (701) is provided with a connecting block (702), the right side of the connecting block (702) is provided with a clamping plate (703), the right side of the clamping plate (703) is connected to the clamping plate (704) through the plug-in plate (706), a separating funnel (705) is clamped between the clamping plate (703) and the clamping plate (704), the upper end of the plug-in plate (706) is provided with a rotating rod (713), and the circumferential surface of the rotating rod (713) is clamped to the inside of the plug-in plate (706) through the clamping block (716).

4. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 3, characterized in that: A slot one (707) is provided inside the splint one (703), the plug-in board (706) is plugged into the inside of the slot one (707), the lower end of the plug-in board (706) is abutted against an abutting block one (709), the lower end of the abutting block one (709) is provided with a spring one (708), and the spring one (708) and the abutting block one (709) are both provided inside the lower end of the slot one (707).

5. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 3, characterized in that: A slot 2 (710) is provided inside the upper end of the splint 1 (703), the left end of the rotating rod (713) is inserted into the inside of the slot 2 (710), the right end of the rotating rod (713) passes through the splint 2 (704) and is connected to a knob, the left end of the rotating rod (713) is abutted against abutment block 2 (712), the left end of the abutment block 2 (712) is provided with a spring 2 (711), and the spring 2 (711) and the abutment block 2 (712) are both provided inside the slot 2 (710).

6. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 3, characterized in that: A movable groove (714) is provided inside the upper ends of the second clamping plate (704) and the plug-in plate (706), and the longitudinal width of the movable groove (714) matches the card block (716). A rotating groove (715) is provided inside the plug-in plate (706), and the rotating groove (715) is connected to the movable groove (714) inside the plug-in plate (706). The transverse width of the rotating groove (715) is the same as that of the card block (716), and the card block (716) is arranged inside the rotating groove (715).

7. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 3, characterized in that: A movable through groove (717) is provided on the left side of the upper end of the delamination device (6), and the overall diameter of the splint 1 (703) and the splint 2 (704) matches the movable through groove (717). The lower ends of the splint 1 (703) and the splint 2 (704) can be sealed and inserted into the movable through groove (717) through a sealing ring. A transparent window (12) is provided on the front of the delamination device (6).

8. The toluene recovery solvent separation and filtration equipment for vitamin H production according to claim 1, characterized in that: A liquid extraction pump (14) is provided at the rear lower end of the stratifier (6), the front end of the liquid extraction pump (14) is connected to the interior of the lower end of the stratifier (6) through a liquid extraction pipe (15), and the upper end of the liquid extraction pump (14) is connected to the interior of the distillation tower (1) through a liquid outlet pipe (16).

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