Method for recycling agricultural films

Abstract

The application relates to a farmland film recycling treatment method, which comprises the following steps: (1) cutting and tearing the farmland film; (2) carrying out dry washing without adding water through friction of the farmland film after cutting and tearing, and screening and removing the mud and straws for the first time; (3) sending out and collecting the mud and straws screened and removed for the first time; (4) carrying out air negative pressure separation on the farmland film separated for the first time, and separating the farmland film from the mud and straws again; (5) carrying out dust removal treatment on the dust separated through air negative pressure separation; (6) carrying out rinsing separation and precipitation on the farmland film after air negative pressure separation, separating and precipitating the residual mud on the farmland film, straws, simultaneously wetting and absorbing water of the residual straws and precipitating the residual straws; (7) carrying out water-carrying friction cleaning and dewatering on the farmland film after rinsing separation and precipitation; (8) carrying out filtering and dewatering on the mud and straws precipitated after rinsing separation and precipitation; and (9) outputting and collecting the farmland film after water-carrying friction cleaning. The farmland film recycling treatment method has the advantages of small water consumption, high treatment efficiency and good treatment effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural film recycling, and in particular to a method for recycling and processing agricultural film. BACKGROUND

[0002] Agricultural film recycling is usually carried out by water washing treatment using an agricultural film recycling and processing device. The structure of the agricultural film recycling and processing device can be understood from the waste agricultural film recycling and processing device disclosed in Chinese Patent Application No. CN 202022208794.4. Since the proportion of agricultural film mud and sand is large and is mixed with a large amount of crop straw, the use of traditional water washing treatment process for recycling and processing has the disadvantages of large water consumption, low processing efficiency, and poor processing effect. Therefore, it is urgent to design a method for recycling and processing agricultural film with small water consumption, high processing efficiency, and good processing effect. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a method for recycling and processing agricultural film with small water consumption, high processing efficiency, and good processing effect.

[0004] The specific technical solution of the present application is as follows:

[0005] A method for recycling and processing agricultural film, comprising: (1) cutting and tearing the agricultural film; (2) dry washing the cut and torn agricultural film without adding water, and screening out mud and straw for the first time; (3) collecting the mud and straw screened out for the first time; (4) air negative pressure separation of the agricultural film separated for the first time, and re-separation of the agricultural film and mud and straw, so that more than 90% of the mud and more than 50% of the straw in the agricultural film can be separated and removed; (5) dust removal treatment of the dust separated by air negative pressure separation to avoid dust dispersion and environmental pollution; (6) rinsing and separating the agricultural film after air negative pressure separation to separate and precipitate the remaining mud and straw on the agricultural film, and to wet and absorb water of the remaining straw; (7) water washing and dehydrating the agricultural film after rinsing and separating to avoid too much water overflow when stacking; (8) filtering and dehydrating the mud and straw precipitated after rinsing and separating; and (9) outputting and collecting the agricultural film after water washing and cleaning.

[0006] As preferred, the agricultural film shearing and shredding is performed by a shearing shredder; the shearing shredder comprises a shearing shell provided with a shearing support, a shearing discharge port arranged at the lower end of the shearing shell, a shearing hopper arranged at the upper end of the shearing shell, shearing rollers pivotally connected to the two ends of the shearing shell, a plurality of moving knives arranged on the side wall of the shearing rollers and distributed along the circumferential direction, a plurality of fixed knives arranged on the inner side of the two side ends of the shearing shell, and a shearing driving device arranged on the shearing support and used for driving the shearing rollers to rotate; the moving knives are arranged along a spiral line; the fixed knives are arranged along the axial direction of the shearing rollers, the inner end of the fixed knife is lower than the outer end, and the angle between the fixed knife and the horizontal plane is 20-30 degrees; the shearing driving device is a belt driving device provided with a motor; the agricultural film shearing and shredding is performed by feeding the film to the shearing shredder by a chain plate conveyor with the inlet end located above the shredding hopper; the agricultural film is fed into the shredding hopper by the chain plate conveyor, and the film is sheared and shredded by the moving knives and the fixed knives and then falls from the shearing discharge port.

[0007] As preferred, the water-free friction dry cleaning is performed by a friction cleaning machine; the friction cleaning machine comprises a cleaning shell provided with a cleaning support, a cleaning sand discharge port arranged at the lower end of the cleaning shell, a cleaning hopper arranged on the upper side of one end of the cleaning shell, a cleaning discharge port arranged at the other end of the cleaning shell, a cleaning roller provided with spiral blades on the side wall and pivotally connected to the two ends of the cleaning shell, a cleaning screen cylinder arranged on the cleaning shell and outside the cleaning shell, and a cleaning driving device arranged on the cleaning support and used for driving the cleaning roller to rotate; the height of the cleaning roller near one end of the cleaning shell is 2-5 degrees lower than the height of the other end; the spiral blades comprise a friction cleaning section, a conveying section connected to the friction cleaning section and located near one end of the cleaning shell, and the pitch of the conveying section is smaller than the pitch of the friction cleaning section; the cleaning driving device is a belt driving device provided with a motor. The agricultural film is fed into the friction cleaning machine from the cleaning hopper, and the film is dry cleaned by high-speed friction without water, so as to shake out the sand and straw in the film; the cleaned film is discharged from the cleaning discharge port, and the sand, straw and other impurities screened by the cleaning screen cylinder are discharged from the cleaning sand discharge port.

[0008] As preferred, the sand and straw separated for the first time during the friction dry cleaning are fed out and collected by a sand belt conveyor provided with a cover on the upper end; the inlet end of the sand belt conveyor is located below the cleaning sand discharge port of the friction cleaning machine used for the water-free friction dry cleaning.

[0009] As preferred, the air negative pressure separation is carried out by using a sedimentation separation device; the sedimentation separation device comprises a separation bin, an air inlet pipe installed on the upper side of the side wall of the separation bin and located in the separation bin, an air supplementing port sequentially located on the lower side of the air inlet pipe, a film feeding pipe with the upper end communicated with the separation bin, a closing discharge valve with a rotating blade rotor installed on the lower end of the separation bin, a film feeding port installed on the upper side of the side wall of the lower end of the film feeding pipe, and a gas outlet located on the upper end of the separation bin; the air outlet end of the air inlet pipe is directed towards the direction of the gas outlet. Under the action of the fan communicated with the air inlet pipe, the negative pressure is generated in the separation bin, the dry cleaned agricultural film is drawn into the separation bin from the separation feeding port, and the stones, sands and straws are not drawn away due to their large density, and the agricultural film after the negative pressure separation is discharged from the closing discharge valve, the dust-containing gas is discharged from the separation gas outlet for dust removal, so as to realize the separation of the agricultural film and the impurities.

[0010] As preferred, the dust separated by the air negative pressure separation is subjected to dust removal treatment by using a dust removal device; the dust removal device comprises a cyclone dust collector with a tangential air inlet pipe installed on the upper side of the side wall, a dust discharging valve installed on the lower end of the cyclone dust collector, and a bag type dust collector with the inlet communicated with the upper end of the cyclone dust collector through a communication pipe; the tangential air inlet pipe is communicated with the gas outlet. The dry cleaned dust-containing gas after the air negative pressure separation is introduced into the cyclone dust collector from the tangential air inlet pipe for dust removal, the dust is discharged from the dust discharging valve and further introduced into the bag type dust collector through the communication pipe for dust removal, and the clean gas is discharged, so as to avoid the dust from escaping and polluting the environment.

[0011] As preferred, the air negative pressure separated agricultural film is rinsed and separated and precipitated by using a rinsing and precipitating tank; the rinsing and precipitating tank comprises: a water tank, a plurality of front and back distributed and both ends pivoted with the upper part of both side ends of the water tank one by one dolly electric roller, two rake material chain wheels provided on the front side of the dolly electric roller and provided with driving shafts, a plurality of circumferentially distributed dolly plates mounted on the side wall of the dolly electric roller, a rake material transmission chain respectively in transmission connection with the two rake material chain wheels, a rake driving device mounted on the outside of the water tank and connected with one end of the driving shaft, a material rake group mounted on the outside of the rake material transmission chain, a chain tensioning plate provided between the two rake material chain wheels and both ends connected with both side ends of the water tank one by one, an agricultural film discharge port provided on the water tank and located below the rake material transmission chain, a residue collecting screw provided with residue collecting spiral blades and both ends pivoted with both ends of the water tank one by one, a residue collecting driving device mounted on the rear end of the water tank and connected with one end of the driving screw, a residue discharging hole provided on the rear bottom of the water tank and located below the screw, an arc-shaped pipe mounted on the bottom of the water tank and the inner hole of which is communicated with the residue discharging hole, an inclined pipe connected with one end of the arc-shaped pipe, two cover plates connected with the other end of the arc-shaped pipe and the upper end of the inclined pipe one by one, two driven chain wheels connected with both sides of the other end of the arc-shaped pipe and the upper end of the inclined pipe one by one, two driving chain wheels connected with both sides of the upper end of the inclined pipe one by one, a residue discharging transmission chain provided with a scraper group on the outside and in transmission connection with the driven chain wheels and the driving chain wheels, a residue discharging driving device mounted on the outside of the upper end of the inclined pipe and connected with one end of the driving shaft, and a residue discharging pipe in communication with the upper end of the inclined pipe; the upper end of the residue discharging pipe is higher than the upper end of the water tank; the rake driving device, the residue collecting driving device and the residue discharging driving device are all speed reducers. The negative pressure separated agricultural film enters the separation and precipitation tank, the agricultural film is rinsed in the separation and precipitation tank, the remaining mud and sand are separated and precipitated into the water bottom from the agricultural film, and the remaining straws are absorbed and foamed to sink into the water bottom, further reducing the content of mud, sand and straws in the agricultural film; the floating agricultural film is pushed by the dolly plates mounted on the dolly electric roller and floats to the front end of the water tank, and then is raked by the material rake to the agricultural film discharge port and falls down, the screw mounted on the bottom of the water tank pushes the impurities such as mud and straws sunk in the bottom of the water tank to the residue discharging hole located on the rear bottom of the water tank, and is discharged from the lower end of the residue discharging pipe under the driving of the scraper group provided on the outside of the residue discharging transmission chain.

[0012] As preferred, the rinsed and separated and precipitated agricultural film is subjected to water friction cleaning and dewatering by using a friction cleaning machine; the friction cleaning machine for water friction cleaning and the friction cleaning machine for non-water friction cleaning have the same structure; the cleaning hopper of the friction cleaning machine is located below the agricultural film discharge port of the rinsing and precipitating tank. The rinsed and separated and precipitated agricultural film enters the friction cleaning machine from the cleaning hopper to be subjected to water friction cleaning and dewatering, so as to reduce the water content of the agricultural film and avoid too much water overflowing when stacking.

[0013] As a preferred, the filter dehydration of the silt, straw and other impurities in the silt, straw and other impurities after the rinsing and separation of the sediment is carried out by using the filter water roller; the filter water roller comprises a filter water base, a middle shaft pivotally connected to the two ends of the filter water base, a filter screen cylinder connected to the middle shaft through a plurality of fixing rods, a filter water driving device installed at one end of the filter water base for driving the middle shaft to rotate, a sewage inlet pipe connected to the filter water base and inserted into the inlet end of the filter screen cylinder, and the inlet end of the filter screen cylinder is 6 to 9 degrees higher than the outlet end; the other end of the sewage inlet pipe is in communication with the discharge pipe of the rinsing and separation of the sediment; the filter water driving device is a belt driving device provided with a motor. The silt, straw and other impurities after the rinsing and separation of the sediment are filtered and dehydrated from the sewage inlet pipe into the inlet end of the filter screen cylinder of the filter water roller, and the dehydrated silt, straw and other impurities are discharged from the outlet end of the filter water roller for convenient collection.

[0014] As a preferred, the filter dehydration of the silt, straw and other impurities in the silt, straw and other impurities after the rinsing and separation of the sediment is carried out by using the filter water roller; the filter water roller comprises a filter water base, a middle shaft pivotally connected to the two ends of the filter water base, a filter screen cylinder connected to the middle shaft through a plurality of fixing rods, a filter water driving device installed at one end of the filter water base for driving the middle shaft to rotate, a sewage inlet pipe connected to the filter water base and inserted into the inlet end of the filter screen cylinder, and the inlet end of the filter screen cylinder is 6 to 9 degrees higher than the outlet end; the other end of the sewage inlet pipe is in communication with the discharge pipe of the rinsing and separation of the sediment; the filter water driving device is a belt driving device provided with a motor. The silt, straw and other impurities after the rinsing and separation of the sediment are filtered and dehydrated from the sewage inlet pipe into the inlet end of the filter screen cylinder of the filter water roller, and the dehydrated silt, straw and other impurities are discharged from the outlet end of the filter water roller for convenient collection.

[0015] Compared with the prior art, the agricultural film recycling treatment method has the advantages that the traditional agricultural film recycling idea is broken, dry cleaning and air negative pressure separation are added, the characteristics of large amount of sand, straw and other impurities in agricultural land agricultural film are fully considered, more than 90% of the sand and more than 50% of the straw in the agricultural film are removed through dry cleaning and air negative pressure separation (in the past, all rely on water washing for cleaning), 1 ton of useful film is cleaned out, 5 tons of water are required in the past, and only 1 ton of water is required, the treatment capacity is large, the agricultural film treatment capacity is increased from less than 2 t / h in the past to 10 t / h, and the problem of capacity limitation of water washing treatment of the agricultural film is avoided; the water consumption is small, the treatment efficiency is high, and the treatment effect is good. The feeding conveying device is a chain plate conveyor, which has the characteristics of bearing more than 2 tons during conveying. The multiple moving knife assemblies of the shearing shredder are assembled on the side wall of the shearing cylinder and are distributed in the circumferential direction, the moving claw assembly is composed of multiple moving claws arranged in a spiral line, the fixed knife assembly is composed of multiple fixed knives distributed in the axial direction of the shredding roller, which is beneficial to improve the tearing effect and efficiency. The friction cleaning machine performs dry friction cleaning and water cleaning and dehydration on the agricultural film, the cleaning screen cylinder is located outside the cleaning shell, the side wall of the cleaning cylinder is provided with spiral blades, the pitch of the conveying section is smaller than that of the friction cleaning section, the height of the cleaning cylinder close to one end of the cleaning shell is 2 to 5 degrees lower than that of the other end, the agricultural film is frictionally cleaned or water cleaned and dehydrated between the high-speed rotating cleaning cylinder and the cleaning screen cylinder, the separation efficiency is high, and the effect is good. The settling separation device is provided with an agricultural film feeding port on the upper side of the side wall of the lower end of the agricultural film feeding pipe under the action of negative pressure, the agricultural film is sucked into the settling bin from the separation feeding port, and most of the stones, sand, straw and other impurities with large density cannot be sucked away and fall from the lower end of the separation feeding pipe. The settling bin is provided with a rotary blade rotor at the lower end, which can ensure that the air pressure in the settling bin does not leak while discharging. The air outlet end of the air inlet pipe is located in the settling bin and faces the direction of the separation gas outlet, which avoids incomplete separation of the agricultural film, and the agricultural film is brought into the air inlet pipe. The air inlet pipe is provided with an air inlet, and the area below the air outlet end of the air inlet pipe forms a wind mixed flow, which avoids the agricultural film from floating into the air inlet pipe with the air flow. The water in the water tank of the rinsing and sedimentation tank is floated to the discharge end under the stirring of the stirring plate installed on the stirring electric cylinder, and then is raked to the agricultural film discharge port by the rake and falls down, the rake tooth structure is adopted to avoid too much water from being taken out with the agricultural film, and the stirring plate is adopted to avoid the agricultural film from being hooked. The bottom residue collecting screw installed at the bottom of the water tank and the spiral push rod located at the rear side of the bottom of the water tank and below the bottom residue collecting screw are beneficial to the discharge of the sand and straw in the water tank at the bottom of the water tank, and avoid frequent cleaning of the water tank. The upper end of the inclined pipe is higher than the upper end of the water tank, which is beneficial to avoid water overflow when discharging the collected residue. The filter roller filters and dehydrates the sedimented sand, straw and other impurities after rinsing and separation, which is convenient for collection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the shearing shredder;

[0017] Figure 2 is a top view of Figure 1 ;

[0018] Figure 3 is a structural schematic view of a friction cleaning machine;

[0019] Figure 4 is a structural schematic view of a sedimentation separation device;

[0020] Figure 5 is a left view of Figure 4 ;

[0021] Figure 6 is a structural schematic view of a rinsing sedimentation tank;

[0022] Figure 7 is an A-A view of Figure 9 ;

[0023] Figure 8 is a structural schematic view of a dust removal device;

[0024] Figure 9 is a structural schematic view of a water filtering roller.

[0025] In the figure: shearing shredder 2, shearing support 21, shearing discharge port 22, shearing shell 23, shearing hopper 24, shearing roller 25, shearing driving device 26, moving knife 27, fixed knife 28, friction cleaning machine 3, cleaning support 31, cleaning sand outlet 32, cleaning shell 33, cleaning hopper 34, cleaning screen cylinder 35, cleaning discharge port 36, cleaning roller 37, cleaning driving device 38, friction cleaning section 39, conveying section 310, sedimentation separation device 4, gas outlet 41, separation bin 42, air inlet pipe 43, agricultural film feeding pipe 44, air supplementing port 45, air locking and discharging valve 46, agricultural film feeding port 47, rinsing sedimentation tank 5, water tank 51, stirring electric roller 52, rake chain wheel 53, slag collecting spiral blade 54, chain tensioning plate 55, rake group 56, raking transmission chain 57, agricultural film discharge port 58, spiral push rod 59, slag collecting driving device 510, slag discharging hole 511, stirring plate 512, arc-shaped pipe 513, cover plate 514, inclined pipe 515, driven chain wheel 516, driving chain wheel 517, scraper group 518, slag discharging transmission chain 519, slag discharging pipe 520, slag discharging driving device 521, dust removal device 7, tangential air inlet pipe 71, cyclone dust collector 72, ash discharging valve 73, communication pipe 74, bag-type dust collector 75, water filtering roller 8, water filtering seat 81, middle shaft 82, filter screen cylinder 83, water filtering driving device 84, sewage inlet pipe 85. DETAILED DESCRIPTION

[0026] The application will be further described in conjunction with the drawings.

[0027] As shown in the drawingsFigure 1 To the attached Figure 9 As shown:

[0028] A kind of agricultural film recycling processing method, (1) agricultural film is cut and torn;(2) agricultural film after cutting and tearing is not washed with water by friction, primary separation screen removes silt, straw;(3) silt, straw removed by primary separation screen is sent out collection;(4) agricultural film separated by primary separation is subjected to air negative pressure separation, agricultural film and silt, straw are separated again, more than 90% of silt in agricultural film, more than 50% of straw can be separated and removed;(5) dust separated by air negative pressure separation is subjected to dust removal treatment, to avoid dust dispersion pollution environment;(6) agricultural film after air negative pressure separation is subjected to rinsing separation and precipitation, so that the remaining silt, straw on agricultural film is separated and precipitated, and the remaining straw is wetted and precipitated;(7) agricultural film after rinsing separation and precipitation is subjected to water friction cleaning and dewatering, to avoid too much water overflow when stacking and affect storage;(8) silt, straw precipitated after rinsing separation is subjected to filtration and dewatering;(9) agricultural film after water friction cleaning is output for collection.

[0029] The agricultural film cutting and tearing is carried out by a cutting and tearing machine 2;The cutting and tearing machine 2 comprises: a cutting shell 23 provided with a cutting support 21, a cutting discharge port 22 arranged at the lower end of the cutting shell 23, a cutting hopper 24 arranged at the upper end of the cutting shell 23, a cutting roller 25 pivotally connected to the cutting shell 23 at both ends through bearings, a plurality of moving knife groups arranged on the side wall of the cutting roller 25 and distributed in the circumferential direction, two fixed knife groups arranged on the inner side of the two side ends of the cutting shell 23, and a cutting driving device 26 arranged on the cutting support 21 for driving the cutting roller 25 to rotate;The moving knife group is composed of a plurality of moving knives 27 distributed along a spiral line;The fixed knife group is composed of a plurality of fixed knives 28 distributed along the axial direction of the cutting roller 25, the inner end of the fixed knife 28 is lower than the outer end, and the angle between the fixed knife and the horizontal plane is 15 degrees;The cutting driving device 26 is a belt driving device provided with a motor;The imported chain conveyor (not shown) is arranged above the cutting hopper to supply the cutting and tearing machine 2 with materials.

[0030] The non-water friction dry cleaning is carried out by using the friction cleaning machine 3; the friction cleaning machine 3 comprises a cleaning shell 33 provided with a cleaning support 31, a cleaning sand outlet 32 arranged at the lower end of the cleaning shell 33, a cleaning hopper 34 arranged on the upper side of one end of the cleaning shell 33, a cleaning discharge port 36 arranged at the other end of the cleaning shell 33, a cleaning drum 37 provided with spiral blades on the side wall and pivotally connected to the two ends of the cleaning shell 33 through bearings, a cleaning screen cylinder 35 arranged outside the cleaning shell 33 and on the cleaning shell 33, and a cleaning driving device 38 arranged on the cleaning support 31 and used for driving the cleaning drum 37 to rotate; the height of the cleaning drum 37 near one end of the cleaning shell 33 is 3 degrees lower than the height of the other end; the spiral blades comprise a friction cleaning section 39 and a conveying section 310 connected to the friction cleaning section 39 and arranged near one end of the cleaning shell 33; the pitch of the conveying section 310 is smaller than the pitch of the friction cleaning section 39; the cleaning driving device 38 is a belt driving device provided with a motor.

[0031] The friction dry cleaning initially separated sand and straw are sent out and collected by using a sand belt conveyor (not shown) provided with a cover on the upper end; the inlet end of the sand belt conveyor is located below the cleaning sand outlet 32 of the friction cleaning machine 3 used for non-water friction dry cleaning.

[0032] The air negative pressure separation is carried out by using the sedimentation separation device 4; the sedimentation separation device 4 comprises a separation bin 42, an air inlet pipe 43 arranged on the upper side of the side wall of the separation bin 42 and having an air outlet end located in the separation bin 42, a supplementary air inlet 45 sequentially located below the air inlet pipe 43, a film feeding pipe 44 having an upper end in communication with the separation bin 42, a closing air discharge and discharging valve 46 arranged at the lower end of the separation bin 42, a film feeding port 47 arranged on the upper side of the side wall of the lower end of the film feeding pipe 44, and a gas outlet 41 arranged at the upper end of the separation bin 42; the air outlet end of the air inlet pipe 43 faces the direction of the gas outlet 41.

[0033] The dust separated by the air negative pressure separation is subjected to dust removal treatment by using the dust removal device 7; the dust removal device 7 comprises a cyclone dust collector 72 provided with a tangential air inlet pipe 71 on the upper side of the side wall, a dust discharging valve 73 arranged at the lower end of the cyclone dust collector 72, and a bag-type dust collector 75 having an inlet in communication with the upper end of the cyclone dust collector 72 through a communication pipe 74; the tangential air inlet pipe 71 is in communication with the gas outlet 41.

[0034] The air negative pressure separated agricultural film is rinsed and separated and precipitated by using a rinsing and precipitating tank 5; the rinsing and precipitating tank 5 comprises a water tank 51, a plurality of front and back distribution and both ends corresponding to the upper part of the two side ends of the water tank 51 through the bearing pivot connection of the stirring electric roller 52, the two rake chain wheels 53 provided on the front side of the stirring electric roller 52 and provided with a driving shaft, a plurality of circumferential distribution of the stirring plate 512 mounted on the side wall of the stirring electric roller 52, the rake transmission chain 57 respectively connected with the two rake chain wheels 53, the rake driving device (not shown) mounted on the outside of the water tank 51 and connected with one end of the driving shaft, the rake group 56 mounted on the outside of the rake transmission chain 57, the chain tensioning plate 55 provided between the two rake chain wheels 53 and both ends corresponding to the two side ends of the water tank 51 through the screw connection, the agricultural film discharge port 58 provided on the water tank 51 and located on the lower side of the rake transmission chain 57, the slag collecting screw 54 provided with a spiral blade 54 and both ends corresponding to the two ends of the water tank 51 through the pivot connection, the slag collecting driving device 510 mounted on the rear end of the water tank 51 and connected with one end of the driving screw 59, the slag discharge hole 511 provided on the rear side of the water tank 51 and located on the lower side of the screw 59, the arc-shaped pipe 513 mounted on the bottom of the water tank 51 and the inner hole is communicated with the slag discharge hole 511, the inclined pipe 515 connected with one end of the arc-shaped pipe 513 through the screw connection, the two cover plates 514 connected with the other end of the arc-shaped pipe 513 and the upper end of the inclined pipe 515 through the screw connection, the driven sprocket 516 provided with two driven shafts connected with the other end of the arc-shaped pipe 513 through the bearing pivot connection, the driving sprocket 517 provided with two driving shafts connected with the upper end of the inclined pipe 515 through the bearing pivot connection, the slag discharge transmission chain 519 provided with a scraper group 518 on the outside and respectively connected with the driven sprocket 516 and the driving sprocket 517, the slag discharge driving device 521 mounted on the outside of the upper end of the inclined pipe 515 and connected with one end of the driving shaft, the slag discharge pipe 520 connected with the upper end of the inclined pipe 515 through the upper end of the side wall; the upper end of the slag discharge pipe 520 is higher than the upper end of the water tank 51; the rake driving device, the slag collecting driving device 510 and the slag discharge driving device 521 are all speed reducers.

[0035] The rinsing and precipitating agricultural film is rinsed and precipitated by using a rinsing and precipitating tank 5; the rinsing and precipitating tank 5 comprises a water tank 51, a plurality of front and back distribution and both ends corresponding to the upper part of the two side ends of the water tank 51 through the bearing pivot connection of the stirring electric roller 52, the two rake chain wheels 53 provided on the front side of the stirring electric roller 52 and provided with a driving shaft, a plurality of circumferential distribution of the stirring plate 512 mounted on the side wall of the stirring electric roller 52, the rake transmission chain 57 respectively connected with the two rake chain wheels 53, the rake driving device (not shown) mounted on the outside of the water tank 51 and connected with one end of the driving shaft, the rake group 56 mounted on the outside of the rake transmission chain 57, the chain tensioning plate 55 provided between the two rake chain wheels 53 and both ends corresponding to the two side ends of the water tank 51 through the screw connection, the agricultural film discharge port 58 provided on the water tank 51 and located on the lower side of the rake transmission chain 57, the slag collecting screw 54 provided with a spiral blade 54 and both ends corresponding to the two ends of the water tank 51 through the pivot connection, the slag collecting driving device 510 mounted on the rear end of the water tank 51 and connected with one end of the driving screw 59, the slag discharge hole 511 provided on the rear side of the water tank 51 and located on the lower side of the screw 59, the arc-shaped pipe 513 mounted on the bottom of the water tank 51 and the inner hole is communicated with the slag discharge hole 511, the inclined pipe 515 connected with one end of the arc-shaped pipe 513 through the screw connection, the two cover plates 514 connected with the other end of the arc-shaped pipe 513 and the upper end of the inclined pipe 515 through the screw connection, the driven sprocket 516 provided with two driven shafts connected with the other end of the arc-shaped pipe 513 through the bearing pivot connection, the driving sprocket 517 provided with two driving shafts connected with the upper end of the inclined pipe 515 through the bearing pivot connection, the slag discharge transmission chain 519 provided with a scraper group 518 on the outside and respectively connected with the driven sprocket 516 and the driving sprocket 517, the slag discharge driving device 521 mounted on the outside of the upper end of the inclined pipe 515 and connected with one end of the driving shaft, the slag discharge pipe 520 connected with the upper end of the inclined pipe 515 through the upper end of the side wall; the upper end of the slag discharge pipe 520 is higher than the upper end of the water tank 51; the rake driving device, the slag collecting driving device 510 and the slag discharge driving device 521 are all speed reducers.

[0036] The filter water roller 8 is used for filtering and dewatering the silt and straw separated after the rinsing and precipitation; the filter water roller 8 comprises a filter water base 81, a middle shaft 82 pivoted to the filter water base 81 at both ends through bearings, a filter screen cylinder 83 connected to the middle shaft 82 through a plurality of fixing rods (not shown), a filter water driving device 84 mounted on one end of the filter water base 81 for driving the middle shaft 82 to rotate, and a sewage inlet pipe 85 screwed to the filter water base 81 and inserted into the inlet end of the filter screen cylinder; the inlet end of the filter screen cylinder 83 is 7.5 degrees higher than the outlet end; the other end of the sewage inlet pipe 85 is communicated with the discharge pipe 520 of the rinsing and precipitation tank 5; the filter water driving device 84 is a belt driving device provided with a motor.

[0037] The film output collection after the water adding and friction cleaning is performed by using a material collecting belt conveyor (not shown) provided with a cover at the upper end; the inlet end of the material collecting belt conveyor is located below the cleaning discharge port 36 of the friction cleaning machine 3 used for performing the water adding and friction cleaning.

[0038] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the present application, the technical features or technical data of the present application can be reselected and combined to form new embodiments, which can be realized by the skilled in the art without creative labor, and therefore these embodiments of the present application which are not described in detail should be regarded as the specific embodiments of the present application and within the protection scope of the present application.

Claims

1. A method for recycling agricultural film, characterized in that, (1) Cut and tear the agricultural film; (2) Dry wash the cut and torn agricultural film without adding water, and initially separate and screen out mud, sand and straw; (3) The mud, sand and straw that are initially separated and screened out are sent out for collection; (4) The agricultural film separated in the first stage is separated by negative air pressure, and the agricultural film is separated from the mud and straw again; (5) The dust separated by negative air pressure is treated by dust removal; (6) The agricultural film after negative air pressure separation is rinsed and separated to separate sediment, so that the remaining mud and sand on the agricultural film are separated and settled, and the remaining straw is moistened and absorbed water to settle; (7) The agricultural film after rinsing and separating sediment is washed and dehydrated by friction with water; (8) The mud and sand and straw settled after rinsing and separating sediment are filtered and dehydrated; (9) The agricultural film after adding water and friction washing is output and collected; The agricultural film shearing and shredding is carried out using a shearing shredder; the shearing shredder includes a shearing drum, multiple moving blade groups mounted on the side of the shearing drum and distributed circumferentially, and two fixed blade groups mounted one-to-one on the inner sides of the two sides of the shearing shell. The moving blade groups consist of multiple moving blades distributed along a spiral line; the fixed blade groups consist of multiple fixed blades distributed along the axial direction of the shearing drum, with the inner end of the fixed blade lower than the outer end, and the angle between the fixed blade and the horizontal plane is 20 degrees to 30 degrees. A friction cleaning machine is used for dry friction cleaning without water and wet cleaning and dehydration of agricultural film. The cleaning screen cylinder is located outside the cleaning shell, and the side of the cleaning drum is equipped with spiral blades. The pitch of the conveying section is smaller than the pitch of the friction cleaning section. The height of the cleaning drum near the cleaning shell is 2 to 5 degrees lower than the height of the other end. The agricultural film is dry-cleaned or wet-cleaned and dehydrated by friction between the high-speed rotating cleaning drum and the cleaning screen cylinder.

2. The method for recycling agricultural film according to claim 1, characterized in that, The shearing shredder includes: a shearing housing with shearing supports, a shearing discharge port located at the lower end of the shearing housing, a shearing hopper mounted at the upper end of the shearing housing, shearing drums pivotally connected at both ends to the ends of the shearing housing, and a shearing drive device mounted on the shearing supports for driving the shearing drums to rotate.

3. The method for recycling agricultural film according to claim 1, characterized in that, The aforementioned waterless friction dry cleaning is performed using a friction cleaning machine. The friction cleaning machine includes: a cleaning housing with a cleaning support, a cleaning mud and sand outlet located at the lower end of the cleaning housing, a cleaning hopper mounted on the upper side of one end of the cleaning housing, a cleaning discharge port located at the other end of the cleaning housing, a cleaning drum with spiral blades on its sides and pivotally connected to both ends of the cleaning housing, a cleaning screen cylinder located outside the cleaning housing and mounted on the cleaning housing, and a cleaning drive device mounted on the cleaning support for driving the rotation of the cleaning drum. The height of the cleaning drum near one end of the cleaning housing is 2 to 5 degrees lower than the height of the other end. The spiral blades include: a friction cleaning section and a conveying section near one end of the cleaning housing and connected to the friction cleaning section, wherein the pitch of the conveying section is smaller than the pitch of the friction cleaning section.

4. The method for recycling agricultural film according to claim 1, characterized in that, The mud, sand, and straw initially separated by the friction dry cleaning are collected by a mud and sand belt conveyor with a cover at the top; the inlet end of the mud and sand belt conveyor is located below the mud and sand outlet of the friction cleaning machine used for waterless friction dry cleaning.

5. The method for recycling agricultural film according to claim 1, characterized in that, The negative pressure air separation is carried out using a sedimentation separation device; the sedimentation separation device includes: a separation chamber, an air inlet pipe installed on the upper side of the separation chamber with its air outlet located inside the separation chamber, a makeup air port located below the air inlet pipe, an agricultural film feed pipe whose upper end is connected to the inside of the separation chamber, an air shut-off and unloading valve installed at the lower end of the separation chamber, an agricultural film feed port located on the upper side of the lower end of the agricultural film feed pipe, and a gas outlet located at the upper end of the separation chamber; the air outlet of the air inlet pipe faces the direction of the gas outlet.

6. The method for recycling agricultural film according to claim 1, characterized in that, The dust separated by the negative pressure of the air is treated by a dust removal device; the dust removal device includes: a cyclone dust collector with a tangential air inlet pipe on the upper side, an ash discharge valve installed at the lower end of the cyclone dust collector, and a bag dust collector whose inlet is connected to the upper end of the cyclone dust collector.

7. The method for recycling agricultural film according to claim 1, characterized in that, The agricultural film separated by negative pressure air is rinsed, separated, and precipitated using a rinsing and sedimentation tank. The rinsing and sedimentation tank includes: a water tank; multiple electric material-feeding rollers distributed front-to-back and pivotally connected at both ends to the upper sides of the two sides of the water tank; two rake sprockets located on the front side of the electric material-feeding rollers and equipped with drive shafts; multiple material-feeding plates circumferentially distributed around the sides of the electric material-feeding rollers; a rake transmission chain respectively connected to the two rake sprockets; a rake driving device mounted on the outside of the water tank and connected to one end of a drive shaft; a material rake assembly mounted on the outside of the rake transmission chain; a chain tensioning plate located between the two rake sprockets and pivotally connected at both ends to the two sides of the water tank; an agricultural film outlet located on the water tank and below the rake transmission chain; a spiral push rod equipped with slag-collecting spiral blades and pivotally connected at both ends to the bottom of both ends of the water tank; a slag-collecting driving device mounted at the rear end of the water tank and connected to one end of the driving spiral push rod; and a slag discharge hole located at the bottom of the rear side of the water tank and below the spiral push rod. An arc-shaped pipe installed at the bottom of the water tank with its inner hole connected to the slag discharge hole; an inclined pipe connected to one end of the arc-shaped pipe at its lower end; two cover plates connected to the other end of the arc-shaped pipe and the upper end of the inclined pipe respectively; driven sprockets pivotally connected at both ends to the two sides of the other end of the arc-shaped pipe respectively; driving sprockets pivotally connected at both ends to the two sides of the upper end of the inclined pipe respectively; a slag discharge transmission chain with a scraper assembly on the outside and connected to the driven sprockets and driving sprockets respectively; a slag discharge drive device installed on the outside of the upper end of the inclined pipe and connected to one end of the drive shaft; and a slag discharge pipe whose upper end is connected to the upper side of the inclined pipe; the upper end of the slag discharge pipe is higher than the upper end of the water tank; the rake drive device, the slag collection drive device, and the slag discharge drive device are all reducers.

8. The method for recycling agricultural film according to claim 1, characterized in that, The agricultural film after rinsing, separation, and sedimentation is dehydrated by friction cleaning with water using a friction cleaning machine; the structure of the friction cleaning machine used for friction cleaning with water is the same as that used for dry friction cleaning without water; the cleaning hopper of the friction cleaning machine is located below the agricultural film outlet of the rinsing and sedimentation tank.

9. The method for recycling agricultural film according to claim 1, characterized in that, The sludge and straw that have settled after rinsing, separation, and sedimentation are filtered and dewatered using a water filter drum; the water in the sludge is removed to reduce the water content; the water filter drum includes: a water filter base, a central shaft with both ends pivotally connected to the two ends of the water filter base, a filter screen cylinder connected to the central shaft via multiple fixed rods on the inner side, a water filter drive device installed at one end of the water filter base to drive the rotation of the central shaft, and a wastewater inlet pipe connected to the water filter base and inserted into the inlet end of the filter screen cylinder; the inlet end of the filter screen cylinder is 6 to 9 degrees higher than the outlet end.

10. The method for recycling agricultural film according to any one of claims 1 to 9, characterized in that, The agricultural film output and collection after water-washing and friction cleaning is carried out by a collection belt conveyor with a cover at the top.

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