CN116734594B - Wet material drying system - Google Patents

Abstract

The invention discloses a wet material drying system; the system comprises a pipe chain conveyor, a plurality of centrifuges, a plurality of dryers, storage bins which are the same as the centrifuges in number and correspond to each other one by one, and port anti-accumulation devices which are the same as the dryers in number and correspond to each other one by one; the number of the feed inlets of the pipe chain conveyor is the same as the number of the storage bins and corresponds to the number of the storage bins one by one; the feeding end of the storage bin is in sealing connection with the feeding end of the centrifugal machine, and the discharging end of the storage bin is in sealing connection with the feeding port of the pipe chain conveyor; the port anti-accumulation device is arranged on the pipe chain conveyor at intervals and is in sealing connection with the feeding port of the dryer. The invention solves the problems that the wet material treatment efficiency is low and the effective conveying of the wet material can not be realized in the production of the triazolesulfone and the fenpyraclonil through the improvement.

Description

A wet material drying system

Technical field

The invention belongs to the technical field of chemical product production and processing, and specifically relates to a wet material drying system.

Background technique

In the fields of chemical industry, medicine and other industries, when wet materials containing organic solvents are dried, nitrogen sealing is required during the transportation process to suppress the volatilization of organic solvents and avoid dangerous situations such as explosions or fires, such as the production of triazulfentrione, Effective nitrogen sealing is required when using drugs such as fenacetate.

During the production of triazulfentrione and fenfluruben, the wet material (containing 20% organic solvent) processed by the centrifuge is transported to the corresponding dryer for drying processing using a pipe chain conveyor. The centrifuge and Dryers are available individually. The amount of material after centrifugation is large, and the centrifuge needs to continuously cooperate with the feeding, and cannot be separated from the discharge for subsequent production. There is a technical problem that cannot improve the operating efficiency of the entire system. When the same batch of materials is discharged into different dryers, a single pipe chain conveyor cannot achieve effective transportation. When the materials cross the previous discharge port, it is easy to accumulate materials at the previous discharge port, causing the previous discharge port to be blocked, and the lower When a batch of materials is put in, it will also be mixed with accumulated materials. The mixing of different batches of materials affects product quality.

Contents of the invention

The purpose of the present invention is to provide a wet material drying system to solve the technical problems of low wet material processing efficiency and inability to realize effective transportation of wet materials during the production of triazulfentrione and fentrizotrione.

In order to achieve the above object, the technical solution adopted by the present invention is:

A wet material drying system includes a pipe chain conveyor, multiple centrifuges, and multiple dryers. The system also includes storage silos with the same number and one-to-one correspondence as the centrifuges, and the same number and one-to-one correspondence with the dryers. A corresponding port material accumulation prevention device; the number of feed ports of the pipe chain conveyor is the same as the number of storage silos and corresponds one to one; the entire storage silo is tapered, and the upper end of the storage silo is provided with a cover. The cover is provided with a first electric butterfly valve, the lower end of the storage bin is provided with a second electric butterfly valve, and the outer wall of the storage bin is provided with a material level meter and a pulse air cushion; the first electric butterfly valve is sealingly connected to the discharge port of the centrifuge, so The second electric butterfly valve is sealingly connected to the feed inlet of the pipe chain conveyor; the port material accumulation prevention device is arranged at intervals on the pipe chain conveyor, and the port material accumulation prevention device includes a valve member and is rotatably connected to both sides of the valve member. Two connecting pipes arranged side by side and symmetrically, a T-shaped pipe with a central space surrounding the valve member, and a stepper motor located outside the T-shaped pipe and drivingly connected to the valve member; the two coaxial pipes of the T-shaped pipe The pipe mouth also surrounds the two connecting pipes and is sealingly connected with the connecting pipes. One port of the T-shaped pipe is sealingly connected with the dryer feed port.

Further, the valve component includes a rotating tube, a toothed ring provided on the outer circumference of the rotating tube, a gear shaft engaged with the toothed ring and rotatably connected to the T-shaped tube, arranged on the T-shaped tube and sliding with the outer circumference of the rotating tube. A matching gland device; a through-hole is provided on the outer wall of the rotating tube. When the through-port is rotated upward, it cooperates with the gland device and achieves sealing of the through-port. The two ends of the rotating tube are provided with first connecting rings. , the port of the connecting pipe is provided with a second connecting ring, and the first connecting ring and the second connecting ring taper fit.

Further, the capping device includes an arc-shaped plate that is in sliding fit with the outer circumference of the rotating tube, a guide tube that is arranged vertically on the T-shaped tube, a guide rod that is in sliding fit with the guide tube and is also connected to the arc-shaped plate. A spring is set on the guide rod and located outside the T-shaped tube; one end of the spring is connected to the end of the guide tube and the other end is connected to the outer wall of the guide rod and is in a stretched state.

Further, a wear-resistant gasket is provided between the first connecting ring and the second connecting ring.

Further, a third electric butterfly valve is provided between the T-shaped pipe and the dryer.

The beneficial effects of the present invention are:

The invention uses the storage bin to temporarily store the centrifuged wet material, so that the centrifuge can be separated from the continuous discharging process and continue to centrifuge the material, which is conducive to improving the operating efficiency of the entire system; the port anti-accumulation device is provided to keep the wet material in the tube When switching the discharge port in the chain conveyor, there will be no material accumulation at the previous discharge port, which can avoid blockage of the previous dryer feed port or mixing of different batches of materials, ensuring product quality.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is an enlarged structural diagram of position I in Figure 1;

Figure 3 is a schematic structural diagram of the A-A direction capping device in Figure 2 in a state of cooperation with the rotating tube.

Among them, 1-pipe chain conveyor; 2-centrifuge; 3-storage silo; 4-first electric butterfly valve; 5-second electric butterfly valve; 6-material level meter; 7-pulse air cushion; 8-connecting pipe; 9-T-shaped tube; 10-stepper motor; 11-second connecting ring; 12-third electric butterfly valve; 13-rotating tube; 14-gear ring; 15-gear shaft; 16-port; 17-first Connecting ring; 18-arc plate; 19-guide cylinder; 20-guide rod; 21-spring; 22-dryer; 23-wear-resistant gasket.

Detailed ways

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in Figures 1 to 3, a wet material drying system; the system includes a pipe chain conveyor 1, at least two centrifuges 2, and at least two dryers 22. In the drawings of the description, two centrifuges 2 Take two dryers 22 as an example for illustration. Centrifuge 2, pipe chain conveyor 1 and dryer 22 are arranged longitudinally in the workshop; the number of feed inlets of pipe chain conveyor 1 is the same as that of centrifuge 2 and corresponds one to one, and the pipe chain conveyor 1 is spaced apart A plurality of port material accumulation prevention devices are provided, and the number of port material accumulation prevention devices is the same as the number of dryers 22 and corresponds one to one. When the centrifuge 2 discharges to the pipe chain conveyor 1, it usually discharges continuously. The discharging process takes a long time and subsequent processing cannot be carried out in time. Therefore, between the feed port of each centrifuge 2 and the pipe chain conveyor 1 A storage bin 3 is added in the room to temporarily store a large amount of wet materials. When the pipe chain conveyor 1 is equipped with multiple discharge ports and the discharge is switched, the previous discharge port is easy to accumulate material and block the previous discharge port; the accumulation of material in the previous discharge port will also cause problems with the subsequent batches of materials. Mixing and drying different batches of materials at the same time cannot ensure product quality, so a port material accumulation prevention device is added to the system to solve this problem. The port material accumulation prevention device is installed at intervals on the pipe chain conveyor 1. Since the entire system needs to maintain a nitrogen-sealed state, the centrifuge 2, storage bin 3, pipe chain conveyor 1 and dryer 22 should be connected in a sealed manner.

The storage bin 3 is cone-shaped as a whole; the upper end of the storage bin 3 is provided with a blocking cover, and the blocking cover is provided with a first electric butterfly valve 4. The first electric butterfly valve 4 is sealingly connected to the discharge port at the lower end of the centrifuge 2; the storage bin 3 A second electric butterfly valve 5 is provided at the lower end, and the second electric butterfly valve 5 is sealingly connected to the feed port of the pipe chain conveyor 1 . In order to facilitate the determination of the amount of material in the storage silo 3, a material level meter 6 is provided on the outer wall of the storage silo 3; a pulse air cushion 7 is also provided on the outer wall of the storage silo 3, and the pulse air cushion 7 is used to promote effective discharge of materials in the storage silo 3 , the pulse air cushion 7 is composed of a rectangular box and a rubber air bag located in the rectangular box. The rubber air bag is equipped with an air pipe and is led to the outside of the box. The external air source is used to control the expansion or contraction of the rubber air bag, and then directly compress the storage bin 3 The materials inside or the sealed space at the upper part of the compressed storage bin 3 are compressed, and the wet materials are extruded and discharged through the pressure created by the compressed air.

The port material accumulation prevention device is integrated with the pipe chain conveyor 1, so that the pipe chain conveyor 1 forms an annular structure as a whole. The port material accumulation prevention device includes a valve component, a connecting pipe 8, a T-shaped pipe 9 and a stepper motor 10. Among them, the connecting pipe 8 is rotatably connected on both sides of the valve member and is arranged symmetrically. The two free ends of the connecting pipe 8 are connected to the pipe body of the pipe chain conveyor 1 through flanges, and can also be connected by welding; The inner diameter is the same as the inner diameter of the pipe of the pipe chain conveyor 1; a second connecting ring 11 is fixed on the port where the connecting pipe 8 matches the valve component. The T-shaped pipe 9 is similar to a tee pipe in structure. The difference is that the two coaxial pipe openings of the T-shaped pipe 9 are provided with internal flanges or the pipe openings are welded with baffle rings; the two symmetrical connecting pipes 8 have pipe ends. are all deep into the coaxial pipe mouth, and the outer wall of the connecting pipe 8 is connected and fixed with the inner flange or retaining ring; the middle space of the T-shaped pipe 9 surrounds the valve component; one port of the T-shaped pipe 9 is connected to the feed port of the dryer 22 Connection, a third electric butterfly valve 12 is also provided between the two. The combination of the T-shaped pipe 9 and the third electric butterfly valve 12 can realize the sealing of the valve component and also the sealing of the feed inlet of the dryer 22. The stepper motor 10 is fixed on the upper side of the T-shaped tube 9. The stepper motor 10 is transmission connected with the valve member and is used to control the opening and closing of the valve member. The valve components include a rotating tube 13, a toothed ring 14, a gear shaft 15 and a gland device; the inner diameter of the rotating tube 13 is the same as the inner diameter of the pipe body of the pipe chain conveyor 1, and a through-hole 16 is provided in the middle of the outer wall of the rotating tube 13, through which When the port 16 rotates to the top, it cooperates with the gland device and realizes the sealing of the port 16. When the port 16 rotates to the bottom, it realizes the discharge function of the valve component; a first connecting ring 17 is fixed at both ends of the rotating tube 13, and the first connecting ring 17 is fixed at both ends of the rotating tube 13. The inner wall of the ring 17 is formed with a tapered surface, and the outer wall of the second connecting ring 11 on the connecting pipe 8 is formed with a tapered surface. The first connecting ring 17 and the second connecting ring 11 have tapered surfaces that match, and a tapered wear-resistant can be set between the matching surfaces. The gasket 23 uses the wear-resistant gasket 23 to reduce wear and clearance. The tapered surface matching structure makes the coaxiality of the connecting tube 8 and the rotating tube 13 better, so that the connecting tube 8 plays a supporting and positioning role for the rotating tube 13. ; The gear ring 14 is fixed on the outer circumference of the rotating tube 13; the gear shaft 15 is directly processed to form a gear on the shaft, and the gear shaft 15 meshes with the gear ring 14; the gear shaft 15 is also rotatably connected to the flange or flange of the T-shaped tube 9 On the baffle ring, the specific structure of the rotary connection is to fix a transversely arranged sleeve on the flange of the T-shaped tube 9 or the baffle ring. The shaft section of the gear shaft 15 is rotatably connected to the sleeve. The shaft section of the gear shaft 15 A circlip is provided on both ends of the sleeve to achieve axial fixation of the gear shaft 15; one end of the gear shaft 15 extends to the outside of the T-shaped tube 9, and passes between the gear shaft 15 and the output shaft of the stepper motor 10. Gear transmission or belt transmission is used for transmission connection, and a belt transmission mechanism composed of a synchronous belt and a synchronous wheel is preferably used. The capping device includes an arc plate 18, a guide cylinder 19, a guide rod 20 and a spring 21; the arc plate 18 is slidingly matched with the outer circumference of the rotating tube 13, and the opening 16 can be blocked by the arc plate 18 during the rotation, realizing the entire rotation. To seal the outer wall of the tube 13, a sealing ring can be set around the opening 16 on the outer wall of the rotating tube 13 to improve the sealing performance. The sealing ring can also be set on the wall of the arc plate 18; two guide tubes 19 can be arranged vertically at intervals. Straightly fixed on the T-shaped tube 9; the guide rod 20 is slidingly matched with the guide cylinder 19 and is also fixedly connected to the arc plate 18; the spring 21 is sleeved on the guide rod 20 and is located outside the T-shaped tube 9, and one end of the spring 21 is connected to the arc plate 18. One end of the guide tube 19 is connected to the outer wall of the guide rod 20 and the other end is connected to the outer wall of the guide rod 20. The spring 21 is in a stretched state under normal conditions. The spring 21 relies on the cooperation between the guide rod 20 and the guide tube 19 to elastically press the arc plate 18 on the outer wall of the rotating tube 13. , can improve sealing performance.

The working process and principle of the present invention is: after a centrifuge 2 has processed the material, the corresponding first electric butterfly valve 4 is controlled to open, and the bottom valve of the centrifuge 2 is controlled to open. At this time, the wet material is discharged into the corresponding storage bin 3 , after the discharge is completed, close the first electric butterfly valve 4 and the bottom valve of the centrifuge 2; after the discharge of the centrifuge 2 is completed, continue to centrifuge the material. After the storage bin 3 is loaded, the second electric butterfly valve 5 is opened, and the wet material is discharged into the pipe chain conveyor 1 under the action of gravity. At the same time, the pulse air cushion 7 is started and the contraction and expansion changes of the pulse air cushion 7 are used to effectively discharge the wet material. Pipe chain conveyor 1. When the first electric butterfly valve 4 is started, it also synchronously controls the operation of the pipe chain conveyor 1. According to the design requirements, it controls the opening of the material accumulation prevention device of one port, and the third electric butterfly valve 12 corresponding to the material accumulation prevention device of this port also opens. During the operation of the pipe chain conveyor 1, the materials are introduced into the corresponding dryer 22. After completing the feeding operation of the dryer 22, the third electric butterfly valve 12 is closed. After the previous dryer 22 completes feeding, if the dryer 22 that needs to be fed is replaced, the pipe chain conveyor 1 is first controlled to suspend operation, the previously opened port anti-accumulation device is controlled to close, and the subsequent dryer 22 that needs to be fed is controlled. The corresponding port material accumulation prevention device is turned on, and after it is turned on, the pipe chain conveyor 1 is used for feeding. At this time, a single centrifuge 2 can be used to feed multiple dryers 22 one by one.

The working process and principle of the port material accumulation prevention device is: control the stepper motor 10 to rotate at a fixed angle and then stop. The stepper motor 10 controls the rotation of the gear shaft 15 through the belt transmission mechanism, and uses the meshing relationship between the gear shaft 15 and the gear ring 14 to control the rotation. The tube 13 rotates 180°. At this time, the opening 16 rotates from the upward position to the downward position and is connected with the corresponding feed port of the dryer 22. When the port material accumulation prevention device is closed, the stepper motor 10 reversely rotates or continues to rotate at a fixed angle to reset the position of the opening 16. After reset, the opening 16 faces upward and is elastically pressed by the arc plate 18 to seal it. The inner diameters of the connecting pipe 8, the rotating pipe 13 and the pipe chain conveyor 1 are the same and are arranged coaxially. Therefore, when the opening 16 faces the upper position, the wet material can smoothly pass through the pipe section of the anti-accumulation device at this port. Wet materials will not accumulate in this pipe section.

In this system, the control of centrifuge 2, first electric butterfly valve 4, second electric butterfly valve 5, third electric butterfly valve 12, pulse air cushion 7, material level meter 6, pipe chain conveyor 1 and stepper motor 10 are all connected to the processing Centralized and unified control is carried out in the comprehensive control room of the workshop.

Claims (3)

1. A wet material drying system, including a pipe chain conveyor, multiple centrifuges, and multiple dryers. It is characterized in that it also includes the same number of storage bins as the centrifuges and one-to-one correspondence, and dryers. The number of port material accumulation prevention devices is the same and corresponds one to one; the number of feed ports of the pipe chain conveyor is the same as the number of storage silos and corresponds one to one; the storage silo is conical as a whole, and the upper end of the storage silo is equipped with There is a cover, a first electric butterfly valve is provided on the cover, a second electric butterfly valve is provided at the lower end of the storage bin, and a material level meter and a pulse air cushion are provided on the outer wall of the storage bin; the first electric butterfly valve is connected to the discharge port of the centrifuge Sealing connection, the second electric butterfly valve is sealingly connected with the feed inlet of the pipe chain conveyor; the pulse air cushion is composed of a rectangular box and a rubber air bag located in the rectangular box. The rubber air bag is provided with an air pipe and is led out to the box. On the outside of the body, the pulse air cushion uses an external air source to control the expansion or contraction of the rubber airbag, and then directly compresses the materials in the storage bin or compresses the sealed space in the upper part of the storage bin, and the wet material is squeezed by the pressure formed by the compressed air. Discharge; the port material accumulation prevention device is located at intervals on the pipe chain conveyor. The port material accumulation prevention device includes a valve member, two connecting pipes rotatably connected to both sides of the valve member and arranged symmetrically, with a middle space surrounding the valve. The T-shaped tube of the component and the stepper motor located outside the T-shaped tube and drivingly connected to the valve component; the two coaxial openings of the T-shaped tube also surround two connecting pipes and are sealedly connected to the connecting pipes. , one port of the T-shaped tube is sealingly connected to the dryer feed inlet; the valve component includes a rotating tube, a toothed ring arranged on the outer circumference of the rotating tube, meshed with the toothed ring and rotatably connected to the T-shaped tube The gear shaft and the gland device are arranged on the T-shaped tube and are slidingly matched with the outer circumference of the rotating tube; a through hole is provided on the outer wall of the rotating tube, and when the through hole is rotated upward, it cooperates with the gland device and realizes communication. To seal the mouth, the two ends of the rotating tube are provided with first connecting rings, the port of the connecting tube is provided with a second connecting ring, the first connecting ring and the second connecting ring taper surface fit; the gland The device includes an arc plate that slides with the outer circumference of the rotating tube, a guide tube that is installed on the T-shaped tube and arranged vertically, a guide rod that slides with the guide tube and is also connected to the arc plate, and is sleeved on the guide rod. And a spring located outside the T-shaped tube; one end of the spring is connected to the end of the guide tube and the other end is connected to the outer wall of the guide rod, and is in a stretched state; the inner diameters of the connecting pipe, the rotating pipe and the pipe chain conveyor are the same And arranged coaxially. 2. A wet material drying system according to claim 1, characterized in that a wear-resistant gasket is provided between the first connecting ring and the second connecting ring. 3. A wet material drying system according to claim 1, characterized in that a third electric butterfly valve is provided between the T-shaped tube and the dryer.