Belt-type acid separation system for chlorinated polyethylene

Abstract

The invention discloses a belt-type acid liquid separation system for chlorinated polyethylene, wherein a transmission belt and a filter cloth belt are synchronously rotated in a base frame, the transmission belt is located within the range of the filter cloth belt, the transmission belt is driven by a transmission roller A, the top surface of the upper transmission belt is horizontal, the filter cloth belt is driven by a transmission roller B, the bottom of the upper filter cloth belt is in contact with the top surface of the upper transmission belt, the transmission roller A is driven by a driving device, the base frame is located above the filter cloth belt and is provided with a cloth device and a cake washing water outlet device in sequence, a plurality of liquid holes are evenly distributed on the central axis of the transmission belt, a drainage device is fixed in the base frame, the top of the drainage device is sealed with the bottom of the upper transmission belt, the drainage device is connected to a drainage tank, the top of the drainage tank is connected to a vacuum pump, a drainage port is provided at the bottom of the drainage tank, and a filter cake receiving trough is fixed at the transmission end of the upper transmission belt in the base frame. From the above structure, it can be seen that the belt-type acid liquid separation system for chlorinated polyethylene of the present invention can effectively ensure the deacidification washing effect while effectively reducing the maintenance rate.

Description

Technical Field

[0001] The invention relates to the technical field of producing chlorinated polyethylene, in particular to a belt-type acid liquid separation system for chlorinated polyethylene. Background Art

[0002] The preparation methods of chlorinated polyethylene generally include solid phase method and solvent method. The former is to pass chlorine gas into polyethylene solid powder and directly carry out gas-solid reaction in a fluidized bed. However, this method has unstable quality, is difficult to control and easily causes environmental pollution. Therefore, it has been gradually eliminated in recent years. The latter is to dissolve polyethylene in carbon tetrachloride solution and react homogeneously after passing chlorine gas. Although this method is easy to control and has stable quality, carbon tetrachloride is easy to destroy the ozone layer when it enters the atmosphere, thereby causing harm to the environment. Therefore, in recent years, the production of chlorinated polyethylene by aqueous suspension method and acid suspension method has gradually been accepted by more people and widely used in industrial production.

[0003] Since the acid phase suspension method faces the problems of high corrosion resistance requirements for post-processing equipment, high equipment investment costs, and the need to grind the dried materials, which leads to high production costs, more manufacturers are willing to use the water phase suspension method to prepare chlorinated polyethylene. Compared with other methods for preparing chlorinated polyethylene, the water phase suspension method usually has the advantages of less equipment investment, stable product quality and low raw material consumption.

[0004] Chlorinated polyethylene is produced by the aqueous suspension process, wherein polyethylene fine powder is dispersed into an aqueous solution containing a dispersant and an emulsifier, chlorine gas is introduced under stirring for chlorination, and after reaching the desired chlorine content, deacidification washing, neutralization, waste liquid removal, centrifugation, and fluidized bed drying are performed to obtain the chlorinated polyethylene product. In order to improve the deacidification efficiency and equipment utilization rate, the deacidification washing process of this method during the production process also uses a centrifugal dehydration device for deacidification, and then the material is washed and neutralized and the waste liquid is filtered and removed before further dehydration by a centrifugal dehydration device. However, due to the corrosiveness of the acid, the centrifugal device will still be corroded after being used for a period of time, resulting in a high maintenance frequency of the centrifugal device, which will affect the production progress. It is now urgent to provide a new deacidification washing device that is not easy to corrode while ensuring the deacidification efficiency and reducing the maintenance rate. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a belt-type acid liquid separation system for chlorinated polyethylene, which can effectively separate the acid liquid in the chlorinated polyethylene acid liquid from the chlorinated polyethylene through the action of negative pressure, and can also simultaneously perform water washing and then filter and collect again, thereby effectively ensuring the deacidification and water washing effect and effectively reducing the maintenance rate, thereby ensuring the normal production of chlorinated polyethylene.

[0006] The technical solution adopted by the invention is:

[0007] A belt-type acid liquid separation system for chlorinated polyethylene comprises a base frame, wherein a transmission belt and a filter cloth belt are synchronously rotatably connected in the base frame, the transmission belt is located in a ring range surrounded by the filter cloth belt, and the two ends of the transmission belt are respectively transmission-connected to a transmission roller A rotationally connected to the base frame, the top surface of the transmission belt of the upper layer is horizontal, the filter cloth belt is transmission-connected by a transmission roller B rotationally connected to the base frame, the bottom of the filter cloth belt of the upper layer is in contact with the top surface of the transmission belt of the upper layer, the transmission roller A is driven by a driving device fixed to the base frame, the base frame is located above the filter cloth belt, and a plurality of cloth devices and at least one cake washing water outlet device are sequentially provided along the transmission direction of the transmission belt of the upper layer, a plurality of liquid through holes are uniformly distributed at the central axis position of the transmission belt and along the central axis, a drainage device is fixed in the base frame at the position of the liquid through holes distributed corresponding to the central axis at the bottom of the transmission belt of the upper layer, and the drainage device The top of the drainage device is sealed with the bottom of the upper transmission belt, and the drainage device is communicated with the drainage tank, and the top of the drainage tank is connected with the vacuum pump through a negative pressure pipe. A drainage port is provided at the bottom of the drainage tank, and a filter cake collecting trough is fixedly provided at one end of the transmission end of the transmission belt on the upper side of the base frame. After the upper filter cloth belt is separated from the transmission belt, it extends into the filter cake collecting trough from the top notch of the filter cake collecting trough and leaves the filter cake collecting trough from the belt outlet hole above the end face of one side of the filter cake collecting trough facing the transmission belt. The base frame is fixedly connected with stopper strips symmetrically arranged along the transmission direction parallel to the upper transmission belt at the two side edges of the top surface where the filter cloth belt is attached to the transmission belt of the upper layer, and the bottom edge of the stopper strip is sealed with the top surface of the filter cloth belt attached to the transmission belt of the upper layer.

[0008] A further improvement of the present invention is that the surface of the transmission belt facing away from the transmission roller A is respectively provided with strip-shaped liquid collecting grooves corresponding to the positions of the liquid-passing holes along the transmission direction perpendicular to the transmission belt, and the liquid-passing holes are located in the middle of the groove bottom of the strip-shaped liquid collecting grooves, and the surface of the transmission belt facing the transmission roller A is symmetrically and parallelly provided with annular sealing strips corresponding to the two sides of the liquid-passing holes along the distribution direction parallel to the liquid-passing holes, and the roller body surface of the transmission roller A is provided with annular positioning grooves with matching cross-sections at the positions of the annular sealing strips, and the drainage device includes a drainage groove with a notch upwardly arranged along the transmission direction of the upper transmission belt, and the notch sealing solid of the drainage groove A strip block is fixedly connected to seal with the bottom of the transmission belt of the upper layer, a liquid suction port matching the notch of the liquid drainage groove is provided in the middle of the strip block corresponding to the position of the liquid drainage groove, the liquid drainage groove is connected with the liquid through holes respectively through the liquid suction port, the top end faces of the strip block are located on the top end faces on both sides of the liquid suction port, and a liquid sealing groove with a matching cross-section is provided corresponding to the annular sealing strip, a sealing water outlet hole is provided at the bottom of the liquid sealing groove, a sealing water inlet connected with the sealing water outlet hole is provided on the outer side wall of the strip block, a plurality of drainage branch pipes are provided at equal intervals on one side of the liquid drainage groove along the extension direction of the drainage groove, and the drainage branch pipes are connected with the drainage tank through the drainage main pipe.

[0009] A further improvement of the present invention is that the bottom of the strip-shaped liquid collecting groove is inclined downward from both ends to the middle, the inclination angle of the bottom of the groove is less than or equal to 3 degrees, and the groove depth of the strip-shaped liquid collecting groove is in the range of 1 to 5 mm.

[0010] A further improvement of the present invention is that arc-shaped transitions are formed between the groove wall and the groove bottom, and between the groove wall and the groove opening of the strip-shaped liquid collecting groove.

[0011] A further improvement of the present invention is that the bottom cross-section of the strip-shaped liquid collecting groove is a concave arc structure.

[0012] A further improved solution of the present invention is that the cross-section of the end faces of the groove openings of the groove walls on both sides of the strip-shaped liquid collecting groove is a convex arc structure.

[0013] A further improvement of the present invention is that at least one strip groove A is provided at the bottom of the strip liquid collecting groove along the extension direction of the strip liquid collecting groove, and the strip groove A extends from the end of the strip liquid collecting groove to communicate with the liquid through hole.

[0014] A further improvement of the present invention is that the surface of the transmission belt facing away from the transmission roller A is provided with strip grooves B at positions corresponding to the liquid through holes and along the distribution direction of the liquid through holes, and the strip grooves B are connected with each liquid through hole in sequence.

[0015] A further improvement of the present invention is that the inner end surface of the annular sealing strip is provided with a sealing ring along the transmission direction of the transmission belt, and the sealing ring is provided in plurality and distributed at equal intervals along the extension direction parallel to the strip-shaped liquid collecting groove.

[0016] A further improvement of the present invention is that the top height of the groove wall of the liquid seal groove close to the liquid through hole is higher than the bottom height of the annular sealing strip corresponding to the bottom of the upper transmission belt, the top height of the groove wall of the liquid seal groove away from the liquid through hole is higher than the top height of the groove wall of the liquid seal groove close to the liquid through hole, and the bottom height of the upper transmission belt is higher than the top height of the groove wall of the liquid seal groove away from the liquid through hole.

[0017] A further improvement of the present invention is that driven transmission belts are symmetrically arranged between the upper transmission belt and the lower transmission belt and on both sides of the drainage device, and the transmission roller C of the driven transmission belt is rotatably connected to the top surface of the supporting plate through a bracket, the supporting plate is fixedly connected to the base frame, and the top surface of the upper driven transmission belt is connected to the bottom surface of the upper transmission belt by static friction.

[0018] A further improvement of the present invention is that a plurality of driven transmission belts are provided on both sides of the liquid discharge device and are evenly spaced and distributed in a direction away from the liquid discharge device.

[0019] A further improvement of the present invention is that the width of the top of the liquid suction port is smaller than the width of the bottom of the liquid suction port.

[0020] A further improved solution of the present invention is that the bottom of the strip block is provided with strip installation grooves corresponding to both sides of the liquid suction port and along the extension direction of the liquid discharge device.

[0021] A further improvement of the present invention is that the main drainage pipe is arranged on a side of the base frame corresponding to the drainage pipe, and a plurality of drainage branch pipes are provided and are arranged at equal intervals along the extension direction of the drainage trough.

[0022] A further improvement of the present invention is that a pressure roller is rotatably connected to the base frame at the transmission starting end position above the top surface of the upper transmission belt, and the upper filter cloth belt is pressed and attached to the top surface of the upper transmission belt by the pressure roller.

[0023] A further improvement of the present invention is that the material blocking strip is inclined toward the middle of the transmission belt along a direction from top to bottom.

[0024] A further improvement of the present invention is that the bottom of the transmission belt on the lower layer on the base frame is also rotatably connected to a transmission roller, the top of the transmission roller is in contact with the bottom of the transmission belt of the lower layer, and there are multiple transmission rollers arranged at equal intervals along the transmission direction of the transmission belt of the lower layer.

[0025] A further improvement of the present invention is that a tensioning roller is rotatably connected to the base frame, bearing seats at both ends of the tensioning roller are adjustably fixedly connected to the base frame, and the filter cloth belt is wound around the tensioning roller.

[0026] A further improvement of the present invention is that a filter cloth belt correction device and a sensor are provided on one side of the filter cloth belt on the base frame, and the filter cloth belt correction device drives the filter cloth belt to move along the axial direction of the drive roller B according to the axial position signal of the drive roller B corresponding to the position of the sensor obtained by the sensor.

[0027] A further improvement of the present invention is that the material distribution device includes side upright plates symmetrically arranged at the positions of the material retaining strips, the top edges between the side upright plates are sealed and fixed with a top plate, the feed pipe passes through the top plate downward from the side of the top plate close to the filter cake receiving trough, and the end upright plates A and end upright plates B are sealed and fixed respectively between the side upright plates and the edges corresponding to the side of the top plate close to the filter cake receiving trough and the side away from the filter cake receiving trough, the bottom edge of the end upright plate B facing the end face of the end upright plate A is sealed and fixed with a bulk material slope plate B, the bulk material slope plate B is inclined downward along the direction facing the end upright plate A, the end face of the end upright plate A facing the end upright plate B and the bulk material slope plate A is sealed and fixed between the feed pipe and the bulk material slope plate B, and the bulk material slope plate A is tilted in the direction facing the end upright plate B. The bulk material ramp B is downwardly inclined, and a material guide vertical plate is sealed and fixed downwardly on the edge facing the end vertical plate A. A bulk material ramp C is sealed and fixed on the bottom edge of the end surface of the end vertical plate A facing the end vertical plate B. The bulk material ramp C is downwardly inclined along the direction facing the end vertical plate B. Both sides of the end vertical plate A, both sides of the end vertical plate B, both sides of the bulk material ramp A, both sides of the bulk material ramp B, both sides of the material guide vertical plate and both sides of the bulk material ramp C are all sealed and fixedly connected with the side vertical plates on the corresponding sides. A material guide hole is formed between the material guide vertical plate and the end vertical plate A. The inclination angle of the bulk material ramp B is smaller than the inclination angle of the bulk material ramp A. The inclination angle of the bulk material ramp A is smaller than the inclination angle of the bulk material ramp C. A material mixing bin is surrounded by the side vertical plates, the top plate, the end vertical plate A, the end vertical plate B and the bulk material ramp B.

[0028] A further improvement of the present invention is that the top pipe opening of the feed pipe is connected and fixed to the bottom of a horizontal material pipe, the horizontal material pipe is perpendicular to the conveying direction of the upper transmission belt, the feed pipe is provided with multiple ones, which are evenly spaced along the extension direction of the horizontal material pipe, and the top of the horizontal material pipe is connected and fixed with a feeding pipe.

[0029] A further improvement of the present invention is that the bottom opening of the feed pipe is an oblique opening, and the oblique opening is inclined downward in a direction away from the end plate A.

[0030] A further improvement of the present invention is that a plurality of material leveling protrusions are fixed on the end surface of the end stand plate B facing the end stand plate A and located above the bulk material ramp plate B, and the material leveling protrusions include material leveling protrusions A evenly distributed above the end stand plate B and evenly distributed protrusions.

[0031] The material leveling protrusion B is arranged below the end plate B.

[0032] A further improvement of the present invention is that the material leveling protrusion A is an inclined rod that is inclined downward along the direction from the middle of the end upright plate B to the side upright plate on the corresponding side, and the inclined rod is inclined downward along the direction away from the end upright plate B.

[0033] A further improvement of the present invention is that the material-distributing protrusions B are conical protrusions evenly distributed below the end stand plate B.

[0034] A further improvement of the present invention is that a plurality of bulk material protrusions are evenly distributed on the top surface of the bulk material ramp A, and the surface of the bulk material protrusions is a smooth curved surface.

[0035] A further improvement of the present invention is that the bulk material ramp A is also evenly provided with a plurality of blanking through holes, and a bulk material ramp D is sealed and fixed to the end surface of the end stand A facing the end stand B and between the bulk material ramp A and the bulk material ramp B, and the bulk material ramp D is inclined downward in the direction facing the end stand B, the inclination angle of the bulk material ramp A is smaller than the inclination angle of the bulk material ramp D, and the inclination angle of the bulk material ramp D is smaller than the inclination angle of the bulk material ramp C.

[0036] A further improvement of the present invention is that a plurality of bulk material protrusions are evenly distributed on the top surface of the bulk material ramp D, and the surface of the bulk material protrusions is a smooth curved surface.

[0037] A further improvement of the present invention is that the top surface of the bulk material ramp D and the corresponding bottom of the material drop through hole are respectively provided with bulk material protrusions.

[0038] A further improvement of the present invention is that the bottom edge of the bulk material ramp D is located above the material leveling protrusion B.

[0039] A further improvement of the present invention is that a rib plate is further provided at the bottom of the bulk material ramp B, and two sides of the rib plate are fixedly connected to the side upright plates on the corresponding sides.

[0040] A further improvement of the present invention is that the bulk material ramp B is sealed and fixedly connected to the material guide vertical plate through the material guide ramp A, the material guide ramp A is inclined downward in the direction facing the end vertical plate A, the two sides of the material guide ramp A are sealed and fixedly connected to the side vertical plates on the corresponding sides, and the inclination angle of the material guide ramp A is greater than the inclination angle of the bulk material ramp B.

[0041] A further improvement of the present invention is that a material guide ramp B is also sealed and fixed to the bottom edge of the material guide vertical plate, the material guide ramp B is parallel to the bulk material ramp C, the material guide hole extends downward to the bottom edge of the material guide ramp B, and the two sides of the material guide ramp B are sealed and fixed to the side vertical plates on the corresponding sides.

[0042] A further improvement of the present invention is that a curved plate is sealed and fixed to the bottom edge of the bulk material ramp C, the bottom edge of the curved plate is bent downward toward the end plate A, the curved plate is tangent to the bulk material ramp C, and both sides of the curved plate are sealed and fixed to the side plates on the corresponding sides.

[0043] A further improved solution of the present invention is that the arc-shaped plate is located in the middle of the bottom edge of the side plate.

[0044] A further improvement of the present invention is that the inclination angle of the bulk material ramp B is less than or equal to 3 degrees, the inclination angle of the bulk material ramp A and the inclination angle of the bulk material ramp D are both within the range of 5 to 10 degrees, and the inclination angle of the bulk material ramp C, the inclination angle of the guide ramp A and the inclination angle of the guide ramp B are all within the range of 30 to 60 degrees.

[0045] A further improvement of the present invention is that the cake washing water outlet device includes a horizontally arranged cake washing water strip tank, the extension direction of the cake washing water strip tank is perpendicular to the transmission direction of the upper transmission belt, and the bottom of the cake washing water strip tank is evenly distributed with multiple cake washing water outlet pipes along the extension direction of the cake washing water strip tank.

[0046] A further improvement of the present invention is that a cloth washing spray pipe is horizontally fixed in the filter cake receiving trough, and the extension direction of the cloth washing spray pipe is perpendicular to the transmission direction of the upper transmission belt. The filter cloth belt transmitted to the filter cake receiving trough is passed through a transmission roller B wound around the filter cake receiving trough so that the outer end surface of the filter cloth belt facing away from the upper transmission belt faces downward and is located within the cloth washing spray range above the cloth washing spray pipe.

[0047] A further improvement of the present invention is that a cloth washing air jet pipe is horizontally fixed in the filter cake collecting trough, the extension direction of the cloth washing air jet pipe is perpendicular to the transmission direction of the upper transmission belt, the cloth washing air jet pipe is located above the filter cloth belt corresponding to the cloth washing spray pipe, the air nozzle of the cloth washing air jet pipe is downward, and the air jet range of the cloth washing air jet pipe is located on the transmission rear side of the filter cloth belt sprayed by the cloth washing spray pipe.

[0048] A further improvement of the present invention is that a filter cake discharge port is provided at the bottom of the filter cake receiving trough.

[0049] A further improvement of the present invention is that a cover is fixedly connected to the top of the base frame, and a plurality of air vents connected to the outside atmosphere are arranged in sequence on the top of the cover along the transmission direction of the upper transmission belt, and the transmission belt, the cloth device, the cake washing water outlet device and the filter cake collecting trough are all located within the range of the cover.

[0050] The beneficial effects of the present invention are:

[0051] First, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention can separate chlorinated polyethylene by negative pressure.

[0052] The acid in the olefinic acid solution is effectively separated from the chlorinated polyethylene, and can be filtered and collected again after water washing at the same time, which effectively ensures the deacidification and water washing effect while effectively reducing the maintenance rate and ensuring the normal production of chlorinated polyethylene.

[0053] Second, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention facilitates the effective separation and filtration of chlorinated polyethylene and acid liquid through the strip-shaped liquid collecting grooves and strip-shaped grooves A and B provided by the transmission belt.

[0054] Third, in the belt-type acid liquid separation system of chlorinated polyethylene of the present invention, the strip groove B can also form a micro-deformation at the bottom of the upper transmission belt corresponding to the position of the liquid through hole under the negative pressure of the drainage device, thereby ensuring that all the liquid flowing out of the bottom of the liquid through hole is sucked into the drainage device to avoid escaping from both sides along the bottom of the transmission belt.

[0055] Fourthly, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention can not only form a liquid seal with the liquid seal groove of the drainage device through the action of the annular sealing strip, thereby avoiding the negative pressure leakage of the drainage device and affecting the filtering effect of the chlorinated polyethylene, but also can make the direct contact medium during the sliding connection between the transmission belt and the base frame be sealing water, so that there will be no sliding friction between the transmission belt and the base frame during the transmission process, thereby extending the service life of the transmission belt.

[0056] Fifth, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention can not only further convert the sliding friction between the transmission belt and the base frame into rolling friction between the transmission roller of the transmission belt and the bracket fixed to the base frame through the action of the transmission belt, thereby further reducing the friction force, reducing energy consumption, and extending the service life of the transmission belt; in addition, the transmission belt can play a role in uniformly supporting the bottom of the upper transmission belt, thereby ensuring the level of the upper transmission belt.

[0057] Sixth, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention can form a sealing cavity between two adjacent sealing rings through the effect of sealing water, thereby further improving the sealing effect of the annular sealing strip.

[0058] Seventh, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention ensures the dynamic stability of the lateral direction of the filter cloth belt and the transmission belt during the transmission process through the filter cloth belt correction device and the sensor, thereby ensuring the filtering effect of the filter cloth belt.

[0059] Eighth, the belt-type acid-liquid separation system for chlorinated polyethylene of the present invention can completely separate the residual chlorinated polyethylene on the filter cloth belt from the filter cloth belt and drop it into the filter cake collecting trough through the functions of the cloth washing spray pipe and the cloth washing air jet pipe, which not only facilitates the next step of the process after the chlorinated polyethylene is collected, but also ensures that the filter cloth belt is transmitted again to fit with the upper transmission belt to filter the material mixed with chlorinated polyethylene and acid liquid again.

[0060] Ninth, the belt-type acid liquid separation system of chlorinated polyethylene of the present invention can make the mixture of chlorinated polyethylene and acid liquid fall onto the filter cloth belt effectively and evenly through the function of the cloth distribution device, thereby facilitating efficient filtration by the filter cloth belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the front cross-section of the acid separation system.

[0062] Figure 2 This is a top view schematic diagram of the acid separation system after the cover and cloth device and the cake washing water outlet device are hidden.

[0063] Figure 3 It is a right side cross-sectional schematic diagram of the acid separation system.

[0064] Figure 4 It is a schematic diagram of an enlarged partial cross-section of the longitudinal section of the transmission belt.

[0065] Figure 5 It is a schematic enlarged cross-sectional view of the connection between the transmission belt and the drainage device.

[0066] Figure 6 It is an enlarged schematic diagram of the front cross-section of the material distribution device. DETAILED DESCRIPTION

[0067] Combination Figure 1 ~ Figure 6It can be seen that the belt-type acid liquid separation system of chlorinated polyethylene includes a base frame 1, in which a transmission belt 2 and a filter cloth belt 3 are synchronously rotated and connected, the transmission belt 2 is located in the annular range surrounded by the filter cloth belt 3, and the two ends of the transmission belt 2 are respectively connected to the transmission roller A10 connected to the base frame 1, the top surface of the upper transmission belt 2 is horizontal, the filter cloth belt 3 is connected to the transmission roller B12 connected to the base frame 1, the bottom of the upper filter cloth belt 3 is in contact with the top surface of the upper transmission belt 2, and the transmission roller A10 is driven by a driving device 35 fixed to the base frame 1. The base frame 1 is located above the filter cloth belt 3 and is provided with two cloth devices 5 and a cake washing water outlet device 6 in sequence along the transmission direction of the upper transmission belt 2. A plurality of liquid holes 36 are evenly distributed at the central axis of the transmission belt 2 and along the central axis. A drainage device 7 is fixed in the base frame 1 at the bottom of the upper transmission belt 2 corresponding to the liquid holes 36 distributed on the central axis. The drainage device 7 The top of the drainage device 7 is sealed and connected to the bottom of the upper transmission belt 2, and the drainage device 7 is connected to the drainage tank 23. The top of the drainage tank 23 is connected to the vacuum pump through a negative pressure pipe 31. The bottom of the drainage tank 23 is provided with a drainage port 32. A filter cake receiving trough 8 is fixedly provided at one end of the transmission end of the transmission belt 2 on the upper side of the base frame 1. The filter cloth belt 3 on the upper layer is sealed and connected to the bottom of the transmission belt 2 on the upper layer. After the moving belt 2 is separated, it extends into the filter cake receiving trough 8 from the top notch of the filter cake receiving trough 8, and leaves the filter cake receiving trough 8 from the belt outlet hole above the end face of the filter cake receiving trough 8 facing the transmission belt 2. On the base frame 1, the two side edges of the top surface where the filter cloth belt 3 is attached to the upper transmission belt 2 are fixedly connected with stopper strips 34 symmetrically arranged along the conveying direction parallel to the upper transmission belt 2, and the bottom edge of the stopper strip 34 is sealed with the top surface of the filter cloth belt 3 attached to the upper transmission belt 2.

[0068] The surface of the transmission belt 2 facing away from the transmission roller A10 is provided with strip-shaped liquid collecting grooves 37 corresponding to the positions of the liquid holes 36 along the transmission direction perpendicular to the transmission belt 2. The liquid holes 36 are located in the middle of the bottom of the strip-shaped liquid collecting grooves 37. The surface of the transmission belt 2 facing the transmission roller A10 is provided with annular sealing strips 40 symmetrically and parallelly located on both sides of the liquid holes 36 and along the distribution direction parallel to the liquid holes 36. The roller surface of the transmission roller A10 is provided with annular positioning grooves with matching cross-sections at the positions of the annular sealing strips 40. The drainage device 7 includes a drainage groove 43 with an upward notch arranged along the transmission direction of the upper transmission belt 2. The notch of the drainage groove 43 is sealed and fixedly connected with a groove for connecting with the upper transmission belt 2. A strip block 67 with a bottom seal, a liquid suction port 42 matching the notch of the liquid drainage groove 43 is provided in the middle of the strip block 67 corresponding to the position of the liquid drainage groove 43, the liquid drainage groove 43 is connected with the liquid through hole 36 respectively through the liquid suction port 42, the top end surface of the strip block 67 is located at the top end surface on both sides of the liquid suction port 42, and a liquid sealing groove 44 with a cross-section matching is provided corresponding to the annular sealing strip 40, the bottom of the liquid sealing groove 44 is provided with a sealing water outlet hole 46, the outer side wall of the strip block 67 is provided with a sealing water inlet 45 connected with the sealing water outlet hole 46, one side of the liquid drainage groove 43 is provided with a plurality of drainage branch pipes 24 at equal intervals along the extension direction of the drainage groove 43, and the drainage branch pipe 24 is connected with the drainage tank 23 through the drainage main pipe 33.

[0069] The bottom of the strip-shaped liquid collecting groove 37 is inclined downward from both ends to the middle, and the inclination angle of the bottom of the groove is less than or equal to 3 degrees. The groove depth of the strip-shaped liquid collecting groove 37 is in the range of 1 to 5 mm.

[0070] The groove wall and the groove bottom of the strip-shaped liquid collecting groove 37 are both arc-shaped transitions, as well as the groove wall and the groove opening.

[0071] The bottom cross section of the strip-shaped liquid collecting groove 37 is a concave arc structure.

[0072] The cross-section of the end faces of the groove openings of the groove walls on both sides of the strip-shaped liquid collecting groove 37 is a convex arc structure.

[0073] At least one strip groove A38 is provided at the bottom of the strip liquid collecting groove 37 and along the extension direction of the strip liquid collecting groove 37 . The strip groove A38 extends from the end of the strip liquid collecting groove 37 to communicate with the liquid through hole 36 .

[0074] The surface of the transmission belt 2 facing away from the transmission roller A10 is provided with strip grooves B39 at positions corresponding to the liquid holes 36 and along the distribution direction of the liquid holes 36 , and the strip grooves B39 are connected with each of the liquid holes 36 in sequence.

[0075] The inner end surface of the annular sealing strip 40 is provided with a sealing ring 41 along the transmission direction of the transmission belt 2 . The sealing ring 41 is provided in plurality and is evenly spaced and distributed along the extension direction parallel to the strip-shaped liquid collecting groove 37 .

[0076] The top height of the groove wall of the liquid sealing groove 44 on the side close to the liquid hole 36 is higher than the bottom height of the annular sealing strip 40 corresponding to the bottom of the upper transmission belt 2, the top height of the groove wall of the liquid sealing groove 44 on the side away from the liquid hole 36 is higher than the top height of the groove wall of the liquid sealing groove 44 on the side close to the liquid hole 36, and the bottom height of the upper transmission belt 2 is higher than the top height of the groove wall of the liquid sealing groove 44 on the side away from the liquid hole 36.

[0077] Driven transmission belts 4 are symmetrically arranged between the upper transmission belt 2 and the lower transmission belt 2 and on both sides of the drainage device 7. The transmission roller C of the driven transmission belt 4 is rotatably connected to the top surface of the supporting plate 17 through the bracket 16. The supporting plate 17 is fixedly connected to the base frame 1. The top surface of the upper driven transmission belt 4 is connected to the bottom surface of the upper transmission belt 2 by static friction.

[0078] There are multiple driven transmission belts 4 located on both sides of the liquid discharge device 7 , and they are evenly spaced and distributed in a direction away from the liquid discharge device 7 .

[0079] The width of the top of the liquid suction port 42 is smaller than the width of the bottom of the liquid suction port 42 .

[0080] The bottom of the strip block 67 is provided with strip mounting grooves 47 corresponding to the two sides of the liquid suction port 42 and along the extending direction of the liquid discharge device 7 .

[0081] The drainage main pipe 33 is arranged on one side of the base frame 1 corresponding to the drainage tank 23 , and a plurality of drainage branch pipes 24 are provided and are arranged at equal intervals along the extension direction of the drainage groove 43 .

[0082] A pressure roller 15 is rotatably connected to the base frame 1 at the conveying starting end position above the top surface of the upper transmission belt 2, and the upper filter cloth belt 3 is pressed and attached to the top surface of the upper transmission belt 2 by the pressure roller 15.

[0083] The material blocking strip 34 is inclined toward the middle of the transmission belt 2 from top to bottom.

[0084] The bottom of the transmission belt 2 on the lower layer on the base frame 1 is also rotatably connected with a transmission roller 11, and the top of the transmission roller 11 contacts the bottom of the transmission belt 2 of the lower layer. There are multiple transmission rollers 11, which are arranged at equal intervals along the transmission direction of the transmission belt 2 of the lower layer.

[0085] The base frame 1 is also rotatably connected to a tensioning roller 26 , and the bearing seats at both ends of the tensioning roller 26 are adjustably fixedly connected to the base frame 1 , and the filter cloth belt 3 is wound around the tensioning roller 26 .

[0086] A filter cloth belt deviation correction device 27 and a sensor 28 are also provided on one side of the filter cloth belt 3 on the base frame 1. The filter cloth belt deviation correction device 27 drives the filter cloth belt 3 to move along the axial direction of the transmission roller B12 according to the axial position signal of the transmission roller B12 at the position of the sensor 28 obtained by the sensor 28.

[0087] The material distribution device 5 includes side upright plates 48 symmetrically arranged at the positions of the material blocking strips 34, and a top plate 49 is sealed and fixed on the top edges between the side upright plates 48. The feed pipe 20 passes through the top plate 49 downward from the side of the top plate 49 close to the filter cake receiving groove 8, and an end upright plate A50 and an end upright plate B51 are sealed and fixed respectively between the side upright plates 48 and the edges corresponding to the side of the top plate 49 close to the filter cake receiving groove 8 and the edge away from the filter cake receiving groove 8. A bulk material slope plate B55 is sealed and fixed on the bottom edge of the end face of the end upright plate B51 facing the end face of the end upright plate A50, and the bulk material slope plate B55 is inclined downward in the direction facing the end upright plate A50, and a bulk material slope plate A53 is sealed and fixed on the end face of the end upright plate A50 facing the end upright plate B51 and between the feed pipe 20 and the bulk material slope plate B55, and the bulk material slope plate A53 is inclined downward in the direction facing the end upright plate B51. The edge of the plate B55 facing the end plate A50 is sealed downwardly fixed with a guide plate 56, and the bottom edge of the end plate A50 facing the end surface of the end plate B51 is sealed and fixed with a bulk material ramp C58, and the bulk material ramp C58 is inclined downward along the direction facing the end plate B51. The two sides of the end plate A50, the two sides of the end plate B51, the two sides of the bulk material ramp A53, the two sides of the bulk material ramp B55, the two sides of the guide plate 56 and the bulk material ramp Both sides of plate C58 are sealed and fixedly connected to the side upright plate 48 on the corresponding side, a material guide hole 57 is formed between the material guide upright plate 56 and the end upright plate A50, the inclination angle of the bulk material ramp plate B55 is smaller than the inclination angle of the bulk material ramp plate A53, and the inclination angle of the bulk material ramp plate A53 is smaller than the inclination angle of the bulk material ramp plate C58, and a material mixing bin is formed between the side upright plate 48, the top plate 49, the end upright plate A50, the end upright plate B51 and the bulk material ramp plate B55.

[0088] The top pipe opening of the feed pipe 20 is connected and fixed to the bottom of the horizontal material pipe 18. The horizontal material pipe 18 is perpendicular to the conveying direction of the upper transmission belt 2. The feed pipe 20 is provided with multiple ones, which are evenly spaced along the extension direction of the horizontal material pipe 18. The top of the horizontal material pipe 18 is connected and fixed with a feeding pipe 19.

[0089] The bottom pipe opening of the feed pipe 20 is an oblique opening 52, and the oblique opening 52 is inclined downward in a direction away from the end stand A50.

[0090] A plurality of material leveling protrusions are fixed on the end surface of the end stand B51 facing the end stand A50 and located above the bulk material slope plate B55. The material leveling protrusions include material leveling protrusions A62 evenly distributed above the end stand B51 and material leveling protrusions B63 evenly distributed below the end stand B51.

[0091] The material leveling protrusion A62 is an inclined rod that is inclined downward in a direction from the middle of the end vertical plate B51 to the side vertical plate 48 on the corresponding side, and the inclined rod is inclined downward in a direction away from the end vertical plate B51.

[0092] The material-distributing protrusions B63 are conical protrusions evenly distributed below the end stand plate B51.

[0093] A further improvement of the present invention is that a plurality of bulk material protrusions 54 are evenly distributed on the top surface of the bulk material ramp A53, and the surface of the bulk material protrusions 54 is a smooth curved surface.

[0094] The bulk material ramp A53 is also evenly provided with a plurality of blanking through holes 60. A bulk material ramp D61 is sealed and fixed on the end surface of the end stand A50 facing the end stand B51 and between the bulk material ramp A53 and the bulk material ramp B55. The bulk material ramp D61 is inclined downward in the direction facing the end stand B51. The inclination angle of the bulk material ramp A53 is smaller than the inclination angle of the bulk material ramp D61, and the inclination angle of the bulk material ramp D61 is smaller than the inclination angle of the bulk material ramp C58.

[0095] A plurality of bulk material protrusions 54 are evenly distributed on the top surface of the bulk material ramp D61, and the surface of the bulk material protrusions 54 is a smooth curved surface.

[0096] The top surface of the bulk material ramp D61 and the corresponding bottom of the material dropping through hole 60 are respectively provided with bulk material protrusions 54 .

[0097] The bottom edge of the bulk material ramp D61 is located above the material leveling protrusion B63.

[0098] A rib plate 66 is also provided at the bottom of the bulk material ramp B55, and two sides of the rib plate 66 are fixedly connected to the side vertical plates 48 on the corresponding sides.

[0099] The bulk material ramp B55 is sealed and fixedly connected to the material guide vertical plate 56 through the material guide ramp A64. The material guide ramp A64 is inclined downward in the direction facing the end vertical plate A50. The two sides of the material guide ramp A64 are sealed and fixedly connected to the side vertical plates 48 on the corresponding sides. The inclination angle of the material guide ramp A64 is greater than the inclination angle of the bulk material ramp B55.

[0100] A material guide ramp B65 is also sealed and fixed to the bottom edge of the material guide vertical plate 56. The material guide ramp B65 is parallel to the bulk material ramp C58. The material guide hole 57 extends downward to the bottom edge of the material guide ramp B65. Both sides of the material guide ramp B65 are sealed and fixed to the side vertical plates 48 on the corresponding sides.

[0101] The bottom edge of the bulk material ramp C58 is sealed and fixed with an arc plate 59, the bottom edge of the arc plate 59 is bent downward toward the end plate A50, the arc plate 59 is tangent to the bulk material ramp C58, and both sides of the arc plate 59 are sealed and fixed to the side plates 48 on the corresponding sides.

[0102] The arc-shaped plate 59 is located at the middle of the bottom edge of the side plate 48 .

[0103] The inclination angle of the bulk material ramp B55 is less than or equal to 3 degrees, the inclination angle of the bulk material ramp A53 and the inclination angle of the bulk material ramp D61 are both within the range of 5 to 10 degrees, and the inclination angle of the bulk material ramp C58, the inclination angle of the guide ramp A64 and the inclination angle of the guide ramp B65 are all within the range of 30 to 60 degrees.

[0104] The cake washing water outlet device 6 includes a horizontally arranged cake washing water strip tank 22, the extension direction of which is perpendicular to the transmission direction of the upper transmission belt 2, and a plurality of cake washing water outlet pipes are evenly distributed at the bottom of the cake washing water strip tank 22 along the extension direction of the cake washing water strip tank 22.

[0105] A cloth washing spray pipe 13 is horizontally fixed in the filter cake receiving trough 8, and the extension direction of the cloth washing spray pipe 13 is perpendicular to the transmission direction of the upper transmission belt 2. The filter cloth belt 3 transmitted to the filter cake receiving trough 8 is wound around the transmission roller B12 in the filter cake receiving trough 8 so that the outer end surface of the filter cloth belt 3 facing away from the upper transmission belt 2 faces downward and is located within the cloth washing spray range above the cloth washing spray pipe 13.

[0106] A cloth washing air jet pipe 14 is also horizontally fixed in the filter cake collecting trough 8. The extension direction of the cloth washing air jet pipe 14 is perpendicular to the transmission direction of the upper transmission belt 2. The cloth washing air jet pipe 14 is located above the filter cloth belt 3 corresponding to the cloth washing spray pipe 13. The air jet nozzle of the cloth washing air jet pipe 14 is downward, and the air jet range of the cloth washing air jet pipe 14 is located at the transmission rear side of the filter cloth belt 3 sprayed by the cloth washing spray pipe 13.

[0107] The bottom of the filter cake receiving trough 8 is connected to a filter cake discharge port 9 .

[0108] The top of the base frame 1 is also fixedly connected to a cover 29, and the top of the cover 29 is provided with a plurality of air vents 30 connected to the outside atmosphere in sequence along the transmission direction of the upper transmission belt 2. The transmission belt 2, the cloth device 5, the cake washing water outlet device 6 and the filter cake collecting trough 8 are all located within the range of the cover 29.

[0109] The material of the transmission belt 2 is rubber.

[0110] When the present application is used, the driving device 35 drives the transmission roller A10 to rotate, and the transmission roller A10 drives the transmission belt 2 to rotate. Since the upper filter cloth belt 3 is pressed against the top surface of the upper transmission belt 2 by the pressure roller 15, the top surface of the upper driven transmission belt 4 is connected to the bottom surface of the upper transmission belt 2 by static friction. Therefore, under the action of the static friction force of the transmission belt 2 with the filter cloth belt 3 and the driven transmission belt 4 respectively, the transmission is transmitted in the same direction at the same linear speed.

[0111] The sealing water supply device supplies sealing water, and the sealing water enters the liquid sealing groove 44 through the sealing water inlet 45 and the sealing water outlet 46 in turn. Then the sealing water level in the liquid sealing groove 44 is higher than the bottom surface of the annular sealing strip 40, and even the sealing water in the liquid sealing groove 44 overflows from the groove opening of the groove wall of the liquid sealing groove 44 on the side close to the liquid through hole 36 to the liquid suction port 42 of the discharge device 7; and then through the action of the sealing ring 41, a sealed cavity can be formed between two adjacent sealing rings 41 through the sealing water, thereby ensuring that the discharge device can only communicate with the outside atmosphere through the liquid through hole 36.

[0112] Then the vacuum pump is started and connected with the top of the drainage tank 23 through the negative pressure pipe 31. The drainage tank 23 is connected with the drainage device 7 through the drainage main pipe 33 and the drainage branch pipe 24, so that the suction port 42 of the drainage device 7 is connected with the top surface of the upper transmission belt 2 through the liquid hole 36 of the transmission belt 2.

[0113] At this time, the feeding pipe 19 is opened, and the cake washing water supply device is made to supply water to the cake washing water strip tank 22 at the same time.

[0114] The material mixed with chlorinated polyethylene and acid solution enters the horizontal material pipe 18 from the feeding pipe 19. The material entering the horizontal material pipe 18 is quickly dispersed at the bottom of the horizontal material pipe 18. Then the material enters the top surface of the bulk material ramp A53 in the material mixing bin through multiple feeding pipes 20 at the bottom of the horizontal material pipe 18 along the length direction of the horizontal material pipe 18. The inclined mouth 52 provided at the bottom pipe mouth of the feeding pipe 20 makes the material fall to the top of the bulk material ramp A53 as much as possible after falling, thereby ensuring the bulking distance of the material on the bulk material ramp A53. The material falling on the bulk material ramp A53 moves downward and slides down along the bulk material ramp A53 under the action of gravity and the continuous falling of the feeding pipe 20. In the process of the material moving along the bulk material ramp A53, Through the action of the bulk material protrusion 54, the material on the bulk material ramp A53 is more dispersed and flows more evenly on the top surface of the bulk material ramp A53. When the material flows through the blanking through hole 60 of the bulk material ramp A53, part of the material will fall through the blanking through hole 60 to the top surface of the bulk material ramp D61 and move downward along the bulk material ramp D61, so that the excess material on the top surface of the bulk material ramp A53 is diverted to the bulk material ramp D61, thereby making the material on the surface of the bulk material ramp A53 more dispersed; in the process of the material moving along the bulk material ramp D61, through the action of the bulk material protrusion 54, the material on the bulk material ramp D61 is more dispersed and flows more evenly on the top surface of the bulk material ramp D61; from the bottom edge of the bulk material ramp A53, the material on the bulk material ramp D61 is more dispersed and flows more evenly on the top surface of the bulk material ramp D61. The materials sliding down from the bottom edge of the bulk material ramp D61 rush toward the end face of the end stand B51 facing the end stand A50. The materials on the end face of the end stand B51 flow downward under the action of gravity. When the materials pass through the material leveling protrusion A62, the material leveling protrusion A62 will make the materials flowing through flow to both sides of the end stand B51 while they are sliding down, so as to avoid the materials gathering in the middle of the end stand B51. When the materials pass through the material leveling protrusion B63 downward, the material leveling protrusion B63 will further disperse the materials flowing through. The materials slide down from top to bottom along the end stand B51 to the bulk material ramp B55. Since the inclination angle of the bulk material ramp B55 is very small, the materials can form a laminar flow along the bulk material ramp B55 and continue to slide downward and pass through. The material passes through the guide plate A64 and enters the guide hole 57 formed between the guide plate 56 and the end plate A50 and between the guide plate B65 and the bulk material slope C58. After passing through the guide hole 57, the material flows downward at a faster speed due to gravity. Finally, the material continues to flow downward along the bulk material slope C58 to the arc plate 59 at the bottom. Due to the Coanda effect, the flow direction of some materials on the surface of the arc plate 59 deviates along the arc plate 59 and then separates from the arc plate 59. The part of the material far from the surface of the arc plate 59 will separate from the bulk material slope C58 along the direction of the bulk material slope C58 due to inertia, so that the material can be more dispersed and evenly dropped on the top surface of the filter cloth belt 3 just passing under the material distribution device 5.After leaving the bulk material ramp C58 and the curved plate 59, the material will be affected by its own gravity and form a parabola before falling onto the top surface of the filter cloth belt 3, and the falling speed will be further accelerated. ;

[0115] Due to the action of the pressure roller 15 and the negative pressure of the drainage device 7, the filter cloth belt 3 will fit tightly to the top surface of the transmission belt 2; so when the material finally falls onto the top surface of the filter cloth belt 3, during the transmission process of the filter cloth belt 3 and the transmission belt 2, the material will flow along the surface of the transmission belt 2 to the strip liquid collecting groove 37, and quickly converge along the bottom of the strip liquid collecting groove 37 to the liquid through hole 36 in the middle, and the acid in the material can pass through the filter cloth belt 3 and downward into the drainage groove 43 of the drainage device 7 through the liquid through hole 36, and then the acid enters the drainage tank 23 through the drainage branch pipe 24 and the drainage main pipe 33 in turn through the negative pressure. When the acid in the drainage tank 23 is more, it is discharged and collected through the drainage port 32 at the bottom of the drainage tank 23; while the chlorinated polyethylene in the material is blocked by the filter cloth belt 3 and filtered out, and still remains on the top surface of the filter cloth belt 3 to gather to form a material cake. The strip grooves A38 and B39 in the strip liquid collecting tank 37 can not only facilitate the rapid separation of the acid liquid from the chlorinated polyethylene at the corresponding position, but also enable the separated acid liquid to quickly converge to the liquid through hole 36, and also facilitate the chlorinated polyethylene after filtration to gather and form cakes. The strip grooves B39 can also facilitate the transmission belt 2 at the corresponding position of the liquid through hole 36 to be slightly deformed downward under the negative pressure of the liquid discharge device 7, so that the bottom of the upper transmission belt 2 corresponding to the position of the liquid through hole 36 is tilted downward along the direction close to the liquid through hole 36, thereby further ensuring that the acid liquid flowing out of the liquid through hole 36 can be completely immersed in the liquid discharge device 7, and the acid liquid is prevented from escaping to both sides along the bottom of the transmission belt 2.

[0116] As the transmission belt 2 continues to drive, the chlorinated polyethylene cake from which the acid has been filtered out on the filter cloth belt 3 is transmitted to the position directly below the cake washing water outlet device 6, so that the cake washing water rinses the chlorinated polyethylene cake; then the rinse water that has rinsed the chlorinated polyethylene cake is separated from the chlorinated polyethylene through the drainage device 7 like the previous acid liquid and enters the drainage tank 23, while the chlorinated polyethylene remains on the top surface of the filter cloth belt 3 and still gathers to form a cake.

[0117] After the filter cloth belt 3 is separated from the transmission belt 2, the chlorinated polyethylene cake continues to be transmitted under the action of the filter cloth belt 3 until the filter cloth belt 3 transmits the chlorinated polyethylene cake to the filter cake receiving trough 8; when the filter cloth belt 3 in the filter cake receiving trough 8 is wound around the transmission roller B12 in the filter cake receiving trough 8 so that the filter cloth belt 3 gathers the chlorinated polyethylene cake with the end face facing downward, the chlorinated polyethylene cake will be separated from the filter cloth belt 3 under the action of gravity and fall into the filter cake receiving trough 8; when passing through the cloth washing spray pipe 13, the cloth washing spray pipe 13 sprays the filter cloth belt 3 is sprayed at the bottom, so that the chlorinated polyethylene remaining on the bottom of the filter cloth belt 3 is separated from the filter cloth belt 3 and falls into the filter cake collecting trough 8; when the filter cloth belt 3 after being sprayed by the cloth washing spray pipe 13 is transmitted to the cloth washing air jet pipe 14, the cloth washing air jet pipe 14 sprays the top surface of the filter cloth belt 3 downward, so that the chlorinated polyethylene and cloth washing water remaining at the bottom of the filter cloth belt 3 are completely separated from the filter cloth belt 3, thereby ensuring that the filter cloth belt 3 can filter the material mixed with chlorinated polyethylene and acid solution again after being driven by the transmission belt 2.

[0118] When the mixture of chlorinated polyethylene and water in the filter cake receiving tank 8 is relatively large, it can be discharged through the filter cake discharge port 9 and transferred to the next process.

[0119] During the transmission process of the transmission belt 2, the transmission belt 2 cooperates with the annular positioning groove corresponding to the transmission roller A10 through the annular sealing strip 40, so that the transmission belt 2 will not deviate laterally.

[0120] During the transmission process of the filter cloth belt 3, when the filter cloth belt 3 deviates laterally, the sensor 28 detects the lateral deviation of the filter cloth belt 3, sends a signal to the filter cloth belt correcting device 27, and controls the filter cloth belt correcting device 27 to correct the lateral deviation of the filter cloth belt 3; thereby, the filter cloth belt 3 is in dynamic stability with the side of the transmission belt 2 during the transmission process.

[0121] During the transmission process of the transmission belt 2, the transmission belt 2 is connected to the driven transmission belt 4 through static friction, thereby avoiding sliding friction between the transmission belt 2 and the base frame 1, extending the service life of the transmission belt 2, and the driven transmission belt 4 plays a role of uniformly supporting the entire upper transmission belt 2, ensuring the horizontal state of the upper transmission belt 2.

Claims

1. Belt-type acid liquid separation system for chlorinated polyethylene, characterized by: The invention comprises a base frame (1), wherein a transmission belt (2) and a filter cloth belt (3) are synchronously rotatably connected inside the base frame (1), the transmission belt (2) is located within a ring range surrounded by the filter cloth belt (3), and the two ends of the transmission belt (2) are respectively connected to a transmission roller A (10) rotatably connected to the base frame (1), the top surface of the upper transmission belt (2) is horizontal, the filter cloth belt (3) is connected to the transmission roller B (12) rotatably connected to the base frame (1), the bottom of the upper filter cloth belt (3) is in contact with the top surface of the upper transmission belt (2), and the transmission roller A (10) is connected to the transmission roller B (12) rotatably connected to the base frame (1), the bottom of the upper filter cloth belt (3) is in contact with the top surface of the upper transmission belt (2), and the transmission roller A (10) is connected to the transmission roller B (12) rotatably connected to the base frame (1). The filter cloth (3) is driven by a driving device (35) fixed to a base frame (1); the base frame (1) is located above the filter cloth belt (3) and is provided with a plurality of cloth distribution devices (5) and at least one cake washing water outlet device (6) in sequence along the transmission direction of the upper transmission belt (2); a plurality of liquid through holes (36) are evenly distributed along the central axis of the transmission belt (2); a liquid discharge device (7) is fixed in the base frame (1) at the bottom of the upper transmission belt (2) at a position corresponding to the liquid through holes (36) distributed along the central axis; the liquid discharge device (7) is arranged along the transmission belt (2 ) and passes in sequence below each material distribution device (5) and the cake washing water outlet device (6); the top of the drainage device (7) is sealedly connected to the bottom of the upper transmission belt (2); the drainage device (7) is communicated with a drainage tank (23); the top of the drainage tank (23) is connected to a vacuum pump via a negative pressure pipe (31); a drainage port (32) is provided at the bottom of the drainage tank (23); a filter cake receiving trough (8) is fixedly provided at one end of the transmission end of the transmission belt (2) located on the upper side in the base frame (1); the filter cloth belt (3) on the upper layer is connected to the transmission belt (2) via a negative pressure pipe (31); and the filter cloth belt (3) on the upper layer is connected to the transmission belt (2) via a negative pressure pipe (31). (2) after separation, the filter cake receiving trough (8) is extended into the filter cake receiving trough (8) from the top notch of the filter cake receiving trough (8), and leaves the filter cake receiving trough (8) from the belt outlet hole above the end surface of the filter cake receiving trough (8) facing the transmission belt (2). The two side edges of the top surface of the base frame (1) at the position where the filter cloth belt (3) is attached to the upper transmission belt (2) are respectively fixedly connected with the symmetrically arranged material blocking strips (34) along the transmission direction parallel to the upper transmission belt (2). The bottom edge of the material blocking strip (34) is sealed with the top surface of the filter cloth belt (3) attached to the upper transmission belt (2); The surface of the transmission belt (2) facing away from the transmission roller A (10) is provided with strip-shaped liquid collecting grooves (37) at positions corresponding to the liquid through holes (36) along the transmission direction perpendicular to the transmission belt (2); the liquid through holes (36) are located in the middle of the groove bottom of the strip-shaped liquid collecting grooves (37); the surface of the transmission belt (2) facing the transmission roller A (10) is provided with annular sealing strips (40) symmetrically and parallel to the distribution direction parallel to the liquid through holes (36) at the positions corresponding to the liquid through holes (36); the roller surface of the transmission roller A (10) is provided with annular positioning grooves with matching cross-sections at positions corresponding to the annular sealing strips (40); the drainage device (7) comprises a drainage groove (43) with an upward notch arranged along the transmission direction of the upper transmission belt (2); the notch of the drainage groove (43) is sealed and fixedly connected to a sealing member for sealing the bottom of the upper transmission belt (2); A strip block (67), wherein a liquid suction port (42) matching the notch of the liquid drainage groove (43) is provided at a position in the middle of the strip block (67) corresponding to the position of the liquid drainage groove (43), the liquid drainage groove (43) is communicated with the liquid through hole (36) respectively through the liquid suction port (42), the top end surface of the strip block (67) is located at the top end surfaces on both sides of the liquid suction port (42), and is provided with a liquid sealing groove (44) with a cross-section matching the top end surface corresponding to the annular sealing strip (40), the bottom of the liquid sealing groove (44) is provided with a sealing water outlet hole (46), the outer side wall of the strip block (67) is provided with a sealing water inlet (45) communicating with the sealing water outlet hole (46), and a plurality of liquid drainage branch pipes (24) are provided at equal intervals on one side of the liquid drainage groove (43) along the extension direction of the liquid drainage groove (43), and the liquid drainage branch pipes (24) are communicated with the liquid drainage tank (23) through the liquid drainage main pipe (33); At least one strip groove A (38) is provided at the bottom of the strip liquid collecting groove (37) and along the extension direction of the strip liquid collecting groove (37), and the strip groove A (38) extends from the end of the strip liquid collecting groove (37) to communicate with the liquid through hole (36); a strip groove B (39) is provided on the surface of the transmission belt (2) facing away from the transmission roller A (10) at a position corresponding to the liquid through hole (36) and along the distribution direction of the liquid through hole (36), and the strip groove B (39) is respectively connected with each liquid through hole (36) in sequence; The material distribution device (5) comprises side upright plates (48) symmetrically arranged at positions corresponding to the material blocking strips (34); a top plate (49) is sealed and fixed to the top edges between the side upright plates (48); a feed pipe (20) passes through the top plate (49) downward from a side of the top plate (49) close to the filter cake receiving groove (8); and end upright plates A (50) and end upright plates B are sealed and fixed to the edges between the side upright plates (48) and the edges of the top plate close to the filter cake receiving groove (8) and the edges of the top plate away from the filter cake receiving groove (8). (51), a bulk material ramp plate B (55) is sealed and fixed at the bottom edge of the end face of the end stand plate B (51) facing the end face of the end stand plate A (50), and the bulk material ramp plate B (55) is inclined downward along the direction facing the end stand plate A (50). A bulk material ramp plate A (53) is sealed and fixed between the feed pipe (20) and the bulk material ramp plate B (55) on the end face of the end stand plate A (50) facing the end stand plate B (51), and the bulk material ramp plate A (53) is inclined downward along the direction facing the end stand plate B (51). (55) A guide plate (56) is sealed and fixed downwardly on the edge facing the end plate A (50); a bulk material ramp C (58) is sealed and fixed at the bottom edge of the end plate A (50) facing the end surface of the end plate B (51); the bulk material ramp C (58) is inclined downwardly in the direction facing the end plate B (51); both sides of the end plate A (50), both sides of the end plate B (51), both sides of the bulk material ramp A (53), both sides of the bulk material ramp B (55), both sides of the guide plate (56) and the bulk material ramp C Both sides of the bulk material ramp (55) are sealed and fixedly connected to the side upright plates (48) on the corresponding sides, a material guide hole (57) is formed between the material guide upright plate (56) and the end upright plate A (50), the inclination angle of the bulk material ramp plate B (55) is smaller than the inclination angle of the bulk material ramp plate A (53), the inclination angle of the bulk material ramp plate A (53) is smaller than the inclination angle of the bulk material ramp plate C (58), and a material mixing bin is formed between the side upright plates (48), the top plate (49), the end upright plate A (50), the end upright plate B (51) and the bulk material ramp plate B (55); An arc plate (59) is sealed and fixed to the bottom edge of the bulk material ramp C (58); the bottom edge of the arc plate (59) is bent downward toward the end stand A (50); the arc plate (59) is tangent to the bulk material ramp C (58); and both sides of the arc plate (59) are sealed and fixed to the side stand (48) on the corresponding side.

2. The belt type acid liquid separation system of chlorinated polyethylene as claimed in claim 1, characterized in that: A driven transmission belt (4) is symmetrically arranged between the upper transmission belt (2) and the lower transmission belt (2) and on both sides of the liquid discharge device (7); a transmission roller C of the driven transmission belt (4) is rotatably connected to the top surface of a support plate (17) via a bracket (16); the support plate (17) is fixedly connected to the base frame (1); and the top surface of the upper driven transmission belt (4) is connected to the bottom surface of the upper transmission belt (2) via static friction; A plurality of driven transmission belts (4) are provided on both sides of the liquid discharge device (7), and are distributed at equal intervals in a direction away from the liquid discharge device (7).

3. The belt type acid liquid separation system of chlorinated polyethylene according to claim 1, characterized in that: A plurality of material leveling protrusions are fixed on the end surface of the end stand plate B (51) facing the end stand plate A (50) and located above the bulk material ramp plate B (55), wherein the material leveling protrusions include material leveling protrusions A (62) evenly distributed above the end stand plate B (51) and material leveling protrusions B (63) evenly distributed below the end stand plate B (51); The material distribution protrusion A (62) is an inclined rod that is inclined downward in a direction from the middle of the end stand plate B (51) to the side stand plate (48) on the corresponding side, and the inclined rod is inclined downward in a direction away from the end stand plate B (51); The material distribution protrusions B (63) are conical protrusions evenly distributed below the end stand plate B (51).

4. The belt-type acid liquid separation system for chlorinated polyethylene according to claim 3, characterized in that: A plurality of bulk material protrusions (54) are evenly distributed on the top surface of the bulk material ramp A (53); The bulk material ramp A (53) is also uniformly provided with a plurality of blanking through holes (60); a bulk material ramp D (61) is sealed and fixed between the bulk material ramp A (53) and the bulk material ramp B (55) on the end surface of the end stand A (50) facing the end stand B (51); the bulk material ramp D (61) is inclined downward in a direction facing the end stand B (51); the inclination angle of the bulk material ramp A (53) is smaller than the inclination angle of the bulk material ramp D (61); and the inclination angle of the bulk material ramp D (61) is smaller than the inclination angle of the bulk material ramp C (58); The bottom edge of the bulk material ramp D (61) is located above the material leveling protrusion B (63); A plurality of bulk material protrusions (54) are evenly distributed on the top surface of the bulk material ramp D (61); The surface of the bulk material protrusion (54) is a smooth curved surface.

5. The belt-type acid liquid separation system for chlorinated polyethylene according to claim 1, characterized in that: The cake washing water outlet device (6) comprises a horizontally arranged cake washing water strip tank (22), the extension direction of the cake washing water strip tank (22) being perpendicular to the transmission direction of the upper transmission belt (2), and a plurality of cake washing water outlet pipes being evenly distributed at the bottom of the cake washing water strip tank (22) along the extension direction of the cake washing water strip tank (22).

6. The belt-type acid liquid separation system for chlorinated polyethylene according to claim 1, characterized in that: A cloth washing spray pipe (13) is fixedly arranged horizontally in the filter cake receiving trough (8), and the extension direction of the cloth washing spray pipe (13) is perpendicular to the transmission direction of the upper transmission belt (2). The filter cloth belt (3) transmitted to the filter cake receiving trough (8) is wound around the transmission roller B (12) in the filter cake receiving trough (8) so that the outer end surface of the filter cloth belt (3) facing away from the upper transmission belt (2) faces downward and is located within the cloth washing spray range above the cloth washing spray pipe (13); A cloth-washing air jet pipe (14) is also horizontally fixed in the filter cake receiving trough (8), the extension direction of the cloth-washing air jet pipe (14) being perpendicular to the transmission direction of the upper transmission belt (2), the cloth-washing air jet pipe (14) being located above the filter cloth belt (3) corresponding to the cloth-washing spray pipe (13), the air jet nozzle of the cloth-washing air jet pipe (14) being downward, and the air jet range of the cloth-washing air jet pipe (14) being located at the transmission rear side of the filter cloth belt (3) sprayed by the cloth-washing spray pipe (13).

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