CN119189121A

CN119189121A - Multi-stage separation and recovery method and system for ground film

Info

Publication number: CN119189121A
Application number: CN202411579984.3A
Authority: CN
Inventors: 包小红
Original assignee: Huasu Saisi Suzhou Intelligent Equipment Co ltd
Current assignee: Huasu Saisi Suzhou Intelligent Equipment Co ltd
Priority date: 2024-11-07
Filing date: 2024-11-07
Publication date: 2024-12-27

Abstract

The present application discloses a method and system for multi-stage separation and recovery of ground film, comprising: a first screening of a part of waste materials of materials and a first discharge of the part of waste materials separated in the first screening process; a first crushing and breaking up of the materials after the first discharge, separation of materials and a part of waste materials by blowing and a second discharge of the part of waste materials separated in the blowing process; and a second crushing and friction washing of the materials after the second discharge, and a second screening of a part of waste materials of the friction washed materials to obtain ground film separated from waste materials; the present application effectively realizes the separation of materials and waste materials through multi-step separation, washing, crushing, breaking up, friction washing and other processing steps, which is beneficial to the recovery or reuse of resources.

Description

Mulch multistage separation and recovery method and system

Technical Field

The application relates to the field of mulch recycling, and more particularly relates to a mulch multistage separation recycling method and system.

Background

In the current recycling treatment of waste plastic films, a water washing mode is mostly adopted. However, in the cotton planting field in Xinjiang, the mulching film is usually attached by a large amount of sand, straw, cotton and other impurities, and the water washing process is difficult to effectively remove the attachments. Because the cleaning effect is poor, the waste plastic film can not reach the pure recovery standard, and is further not suitable for recovery applications such as subsequent granulation. This prior art disadvantage severely limits the reuse of plastic films and increases the difficulty and cost of waste disposal.

Disclosure of Invention

The application provides a mulch multistage separation and recovery method and a mulch multistage separation and recovery system, which can effectively separate mulch and waste materials and are beneficial to resource recovery or reutilization.

The application provides a mulch multistage separation and recovery method, which comprises the steps of carrying out first screening on a part of waste materials and carrying out first discharge on the part of waste materials separated in the first screening process, carrying out first crushing and scattering on the first discharged material, carrying out second discharge on the part of waste materials separated in the blowing-assisted process by utilizing the blowing-assisted material and the part of waste materials, carrying out second crushing and friction scrubbing on the second discharged material, carrying out second screening on the part of waste materials after friction scrubbing to obtain the mulch separated from the waste materials, and carrying out waste film cleaning without consuming a large amount of water.

In an alternative of the first aspect, the first screening includes a first step of screening a portion of the waste material and a second step of screening, wherein the material is screened for waste material smaller than a first predetermined size during the first step of screening, the screened material is screened for second step of screening, and the material is screened for waste material smaller than a second predetermined size during the second step of screening.

In an alternative of the first aspect, the first discharging includes a first step of discharging a portion of the waste material separated during the first screening and a second step of discharging, wherein the waste material separated during the first screening is sucked and the belt is deslagged when the first step is discharged, and the waste material separated during the second screening is sucked and the belt is deslagged when the second step is discharged.

In an alternative scheme of the first aspect, the blowing-assisting comprises a first step of blowing-assisting part of the broken materials and a second step of blowing-assisting part of the waste materials, wherein the blowing-assisting part is used for carrying out unidirectional conveying on the materials during the first step of blowing-assisting, separating part of the waste materials during the conveying process, and the separated materials and part of the waste materials are reversely conveyed during the second step of blowing-assisting, and the materials and the waste materials are respectively stored.

In an alternative of the first aspect, the second discharging includes a third step of discharging a portion of the waste material separated during the blow-assist process and a fourth step of discharging, wherein the waste material separated during the first step of blow-assist process is sucked and belt-discharged during the third step of discharging, and the waste material separated during the second step of blow-assist process is sucked and belt-discharged during the fourth step of discharging.

In one alternative of the first aspect, the friction wash comprises a first step of friction wash and a second step of friction wash on the crushed material, wherein the crushed material is friction washed during the first step of friction wash and the material subjected to the first step of friction wash is friction washed during the second step of friction wash.

In a second aspect, the application provides a mulch multistage separation and recovery system, which comprises a screening device, a discharging device, a shredding device, a scattering device and a friction washing device, wherein the screening device is used for carrying out first screening and second screening on a part of waste materials, the discharging device is connected with the screening device and is used for carrying out first discharging on a part of waste materials separated in the first screening process and carrying out second discharging on a part of waste materials separated in the blowing-assisted separation process, the shredding device is used for carrying out first shredding on the first discharged material and carrying out second shredding on the second discharged material, the scattering device is used for scattering the first shredded material, the air chamber is used for separating the material and a part of waste materials by utilizing the blowing-assisted separation, and the friction washing device is used for scrubbing the second shredded material.

In an alternative of the second aspect, the screening device comprises a first screening assembly for performing a first step of screening of the material for waste material smaller than a first preset size, a second screening assembly for performing a second step of screening of the material for waste material smaller than a second preset size, the discharge device comprises a first dust removal assembly respectively connected to the first screening assembly and the second screening assembly for sucking out a portion of the waste material separated in the first screening process, and a first conveying assembly respectively connected to the first screening assembly and the second screening assembly for discharging a portion of the waste material separated in the first screening process.

In an alternative of the second aspect, the air chamber comprises a first air flow area and a second air flow area, a first air blowing component used for providing air flow for separating materials from waste materials in the first air flow area, a second air blowing component used for providing air flow for separating materials from waste materials in the second air flow area, a second dust removing component connected with the first air flow area and the second air flow area respectively and used for sucking out part of waste materials separated in the blowing assisting process, and a second conveying component connected with the first air flow area and the second air flow area respectively and used for discharging part of waste materials separated in the blowing assisting process.

In an alternative of the second aspect, the friction washing device comprises a first friction washing component, a second friction washing component and a third screening component, wherein the first friction washing component is used for carrying out first-step friction washing on materials subjected to second fragmentation, the second friction washing component is used for carrying out second-step friction washing on the materials subjected to the first-step friction washing, and the third screening component is used for carrying out second screening on waste materials subjected to the friction washing.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate one or more embodiments of the present application and, together with the description, serve to explain the principles of the application and to enable a person skilled in the pertinent art to make and use the application.

FIG. 1 is a flow chart of an exemplary mulch multistage separation recovery method according to some embodiments of the present application;

FIG. 2 is an exemplary screening method flow diagram according to some embodiments of the present application;

FIG. 3 is a flowchart of an exemplary method of draining according to some embodiments of the application;

FIG. 4 is a flow chart of an exemplary blow-down assist separation method according to some embodiments of the application;

FIG. 5 is a flowchart of an exemplary method of draining according to some embodiments of the application;

FIG. 6 is a flowchart of an exemplary method of friction wash separation according to some embodiments of the application;

FIG. 7 is a schematic diagram of an exemplary trommel separation system according to some embodiments of the application;

FIG. 8 is a schematic structural view of an exemplary dust extraction assembly according to some embodiments of the application;

FIG. 9 is a top view of an exemplary trommel separation system according to some embodiments of the application;

FIG. 10 is a schematic diagram of an exemplary air separation system according to some embodiments of the application;

FIG. 11 is a top view of an exemplary air separation system according to some embodiments of the application;

FIG. 12 is a schematic illustration of an exemplary mechanical friction wash separation system according to some embodiments of the application;

FIG. 13 is a schematic diagram of an exemplary vibratory screen separation system according to some embodiments of the application;

FIG. 14 is a top view of an exemplary mechanical friction wash separation system and vibratory screen separation system according to some embodiments of the application.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the examples set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application.

The example provides a multi-stage separation and recovery method for agricultural mulch films, which is mainly divided into three stages of dry separation processes, and specifically comprises three processing processes of drum screen separation, air separation and mechanical friction scrubbing.

S1, a drum screen separation process

The materials processed in this example include plastic waste mulch, sand, straw, cotton boll, dust, etc., wherein the plastic waste mulch is the main material required in this example, and the remaining components can be regarded as waste materials. As shown in fig. 1, in the process of separating a trommel, materials with different sizes are separated according to sizes by rotating the trommel, and when the waste rolls on the surface of the screen, the waste with a size smaller than the screen holes rapidly passes through the screen holes, so that the waste is separated from other materials. Specifically, use the drum sieve to carry out the first screening of a part of waste material and carry out first discharge to the waste material, remove a part of waste material from the material promptly, it is understood that the waste material refers to sand, straw and cotton boll, and the waste material also possesses certain recovery value, and for example sand possesses planting value, and the waste material that separates can be discharged automatically when the drum sieve rotates, makes the flow more continuous, automatic, avoids the waste material to pile up in equipment simultaneously, then will pass through the material of first screening and send into the air separation flow.

It is conceivable that when handling the material of different composition, the trommel can adjust the size of the sieve hole as required to realize the customization screening, rely on like this, the waste material can accurately separate from the material, improves the screening precision of whole technological process.

S2, air separation process

As shown in fig. 1, in the air separation process, the first discharged material is subjected to the first crushing treatment, and it is to be noted that the first discharged material refers to a material from which a part of waste is discharged, and it is to be understood that, in the first crushed material, a material with a lighter weight is more easily separated by an air flow, and through crushing, the size of the material is reduced, and the suspension characteristics of materials with different weights are more remarkable, so that the air flow assisted separation is more efficient. The crushed materials can be adhered or agglomerated, and before the blowing-assisted separation, the first crushed material is subjected to scattering treatment, and the scattering process further disperses the materials in a mechanical vibration, rolling or impact mode and the like, so that the independence of individual materials is ensured, and the waste materials and the main materials are distributed more uniformly, so that ideal conditions are provided for the blowing-assisted separation. And finally, separating the scattered materials and a part of waste materials by utilizing blowing-assisted separation, separating the main materials with lighter weight from the heavier waste materials by airflow, performing secondary discharge on the waste materials in the blowing-assisted process, and conveying the materials subjected to the blowing-assisted separation into a mechanical friction washing separation process. The separation flow of the crushing, scattering and blowing-assisting is progressive layer by layer, so that the separation is more accurate and efficient, the advantages of each step are fully utilized, and high-purity materials are provided for subsequent treatment.

It is conceivable that the air separation process can separate the lighter main materials from the heavier waste materials by adjusting the air flow speed and the angle according to the weight difference of the crushed materials, thereby improving the separation precision and the flexibility of the separation process.

S3, mechanical friction washing separation process

As shown in fig. 1, in the mechanical friction washing separation process, the material is subjected to the second crushing treatment, it can be understood that in the air separation process, the size of the material is primarily reduced by the first crushing, and the requirement of subsequent crushing is reduced, so that the second crushing can be more efficiently aimed at smaller materials, in addition, excessive crushing caused by one-time crushing can be avoided by the distribution crushing, more uniform particle distribution can be obtained by the distribution crushing, and the quality of the finished product material is improved. And then carrying out mechanical friction cleaning on the materials after the second crushing treatment, wherein the waste materials and impurities attached to the materials can be removed by the action of mechanical friction, so that the effective separation effect is achieved, and particularly, for light or tiny waste materials, the friction effect can separate the waste materials from the main materials, and it can be understood that the main materials refer to mulching films. And finally, carrying out second screening on the friction-washed material to finally obtain the required mulching film.

Roller screen classification

In another specific example, for a drum screen separation process, a classification step is added, specifically, as shown in fig. 2, S11, the first screening includes a first screening and a second screening, the materials include sand, straw and cotton boll of different sizes, the first screening uses a small-aperture screen, firstly, the waste materials smaller than a first preset size are screened out, the waste materials are separated from the materials, the first screening mainly screens out the sand, the sand can be used for improving soil, increasing the organic matter content of the soil, the remainder is screened out by a large-aperture screen, the waste materials smaller than a second preset size are further screened out, the waste materials are separated from the materials, the second screening mainly screens out straw and cotton boll, wherein the first preset size is smaller than the second preset size, the small-sized and large-sized classification screening mode can fully recover small-particle waste materials, effectively remove large-particle waste materials, the screening process is more economical and targeted, and high-quality raw materials are provided for subsequent processing.

As shown in fig. 3, in the trommel classification process, dust removal and waste disposal measures corresponding to classification screening include S13 first-step discharge and S14 second-step discharge. Specifically, during the first screening process, fine waste materials (such as dust and the like) are generated along with the air flow, and the dust remover can effectively absorb the waste materials and prevent the waste materials from being mixed into the materials again, and the waste materials (such as sandy soil, straw, cotton boll and the like) with larger particles separated by the drum screen are conveyed to a waste material treatment area by using a belt.

It will be appreciated that in a large-scale screening process, a large amount of dust is produced, so that two separate dust collectors may be used for the first and second screening steps, and that for a small-scale screening process, one dust collector may be used.

It is conceivable to add a cyclone separation step between the trommel and the suction of the dust separator, using the principle of centrifugal force to separate the larger particles from the air stream.

Blowing-assisted classification

In another specific example, a grading step is additionally arranged for an air separation process, specifically, as shown in fig. 4, the auxiliary blowing comprises a first auxiliary blowing step and a second auxiliary blowing step, in the first auxiliary blowing step, a preset air flow strength is set firstly, the air flow blows materials to a second auxiliary blowing step, the air flow not only pushes the materials to advance, but also has a certain dust raising effect, the lighter dust particles are facilitated to be separated from the materials, meanwhile, the equipped conveyor belt ensures that the materials stably advance in the moving process to avoid offset or accumulation caused by air flow disturbance, and in the S22, the air flow exerts an action on the materials to push the materials along the set conveying direction after the materials enter the second auxiliary blowing step, in the process, the auxiliary blowing conveying force and direction can be adjusted, so that the pushing of the materials can be maintained, the layered separation can be realized, two reversely-operated conveyor belts are respectively arranged below the areas, the two reversely-operated conveyor belts are respectively used for receiving the materials with different weights, and the two reversely-operated conveyor belts fall in different directions, and the opposite directions are respectively separated from each other, so that the materials fall in different directions are clearly separated.

In the assisted blowing classification scheme, dust removal and waste treatment measures corresponding to classification assisted blowing include a first step discharge and a second step discharge. Specifically, as shown in fig. 5, S23, in the first step of blowing-assisting process, the material moves to the second step of blowing-assisting area under the pushing of the air flow, dust raised by the air flow is sucked by using a dust collector, the dust collector effectively sucks dust and light particles on the surface of the material through a dust suction port arranged on a material conveying path, S24, in the second step of blowing-assisting process, dust raised by the air flow is sucked by using the dust collector, and a conveying belt for receiving the waste is connected with a waste conveying belt, so that the waste is discharged.

Mechanical friction wash classification

In another specific example, for the mechanical friction washing separation process, a grading step is added, specifically, as shown in fig. 6, friction washing comprises a first friction washing step and a second friction washing step, wherein in the first friction washing step, liquid medium is not introduced, but the waste is removed by virtue of the force generated by friction, in the friction washing step, the waste is continuously stripped and released due to kinetic energy generated by friction, and in the S32, the second friction washing step is carried out synchronously with the first friction washing step, in the step, no liquid medium is introduced, the waste on the surface of the material is continuously removed by friction force, the second friction washing step receives the material from the first friction washing step, and the cleanliness of the material is further improved by further friction and collision of the second friction washing step.

This example provides a multistage separation recovery system of plastic film, including screening plant, discharge device, shredding device, break up the device, plenum and friction washing device, screening plant is used for carrying out the first screening and the second screening of partly waste material to the material, discharge device is connected with screening plant, be used for carrying out first discharge to the partly waste material of first screening in-process separation and carrying out the second discharge to the partly waste material of helping blowing separation in-process separation, shredding device is used for carrying out first breakage to the material after first discharge and carrying out the second breakage to the material after the second discharge, break up the device and be used for breaking up the material after first breakage, the plenum is used for utilizing helping blowing separation material and partly waste material, friction washing device is used for carrying out friction scrubbing to the material after the second breakage.

Partial system for processing separation flow of rotary screen

This example illustrates a separation recovery system in the order of a separation recovery process in which:

as shown in fig. 7, the screening apparatus includes a first screening assembly 11 and a second screening assembly 12, the first screening assembly 11 and the second screening assembly 12 are designed as a trommel, in this example, waste mulch occupies about 15% of the total amount of material, waste occupies about 85% of the total amount of material, the mesh size of the first screening assembly 11 is smaller than the mesh size of the second screening assembly 12, and the material is classified according to size, thereby realizing separation of waste, the first screening assembly 11 is used for screening sand and soil, and the second screening assembly 12 is used for screening straw and cotton bolls, wherein the trommel body is made of metal material, and is a cylindrical drum shell, and the trommel body is inclined so that the material in the screening process rolls downward under the finishing effect, which contributes to uniform distribution of the material in the drum and improves the screening effect.

Still further, the first screen assembly 11 includes a first housing and a first trommel, a first mounting frame is provided in the first housing, the first trommel is mounted on the first mounting frame, the second screen assembly 12 includes a second housing and a second trommel, a second mounting frame is provided in the second housing, the second trommel is mounted on the second mounting frame, and a plurality of openings are provided in the first housing and the second housing.

As shown in fig. 7, the discharging device comprises a first dust removing assembly 21 and a first conveying assembly 22, the first dust removing assembly 21 is used for sucking dust generated in the first screening process, the first dust removing assembly 21 comprises a first pipeline 211, a first dust remover 212, a first dust removing belt 213, a second pipeline 214, a second dust remover 215 and a second dust removing belt 216, one end of the first pipeline 211 is communicated with the first screening assembly 11, the other end of the first pipeline is communicated with the first dust remover 212, the first dust removing belt 213 is connected with the discharging end of the first dust remover 212, one end of the second pipeline 214 is communicated with the second screening assembly 12, the other end of the second pipeline is communicated with the second dust remover 215, the second dust removing belt 216 is connected with the discharging end of the second dust remover 215, the first conveying assembly 22 is used for discharging sand, soil and cotton bolts separated in the first screening process, the first conveying assembly 22 comprises a first slag removing belt 221 and a second slag removing belt 222, the first belt 221 is arranged below the first screening assembly 11, a discharge port below the first screening assembly 11 is received, one end of the first slag removing assembly is communicated with the second screening assembly 12, the second slag removing assembly is axially communicated with the second slag removing assembly 222, and the first slag removing assembly is axially communicated with the second slag removing assembly 12, and the second slag removing assembly is axially communicated with the second slag removing assembly 222 is axially communicated with the first dust and discharged by the first dust.

For the dust removing assembly, this example provides a cyclone separator structure, as shown in fig. 8, the first dust removing assembly 21 may adopt this kind of structure, specifically, this kind of dust removing assembly includes first branch road 01, cyclone bucket 02, second branch road 03, dust removing fan 04, dust remover 05 and dust removing belt 06, taking first screening assembly 11 as an example for illustration, one end of first branch road 01 is connected with the discharge gate above first screening assembly 11, its other end is connected with the side opening of cyclone bucket 02, one end of second branch road 03 is connected with the top opening of cyclone bucket 02, its other end is connected with the inlet end of dust remover 05, dust removing fan 04 sets up in the middle section of second branch road 03, dust removing belt 06 is connected with the discharge end of dust remover 05.

Furthermore, flange connection or sealing joint is adopted among all branches to ensure that no gas leaks under the high negative pressure operation condition, the first branch 01 is used as an air inlet pipeline to be connected to the side upper part of the cyclone hopper 02, one end close to the cyclone hopper 02 is designed to be at a downward inclined angle so that the air flow can enter the cyclone hopper 02 along the tangential direction to form rotary air flow, heavy waste is sunk along the wall surface of the cyclone hopper 02 due to centrifugal force generated by rotation to realize primary separation, a rotary valve is arranged at the bottom of the cyclone hopper 02, the rotary valve can ensure that the lower part of the cyclone hopper 02 is isolated from the air flow at the upper part to avoid secondary dust emission, a dust removing fan 04 is arranged between the cyclone hopper 02 and the dust remover 05 to provide power, the dust removing fan 04 pumps the air flow in the cyclone hopper 02 and enables the air flow to enter the dust remover 05 at the next stage to continuously, the air flow is ensured to maintain the negative pressure state in the whole structure to generate continuous air flow circulation, the dust remover 05 is arranged at the tail end of the structure to catch waste with smaller particles, the air flow is further filtered by the structure without the dust remover or the dust remover, and the dust remover has a fine dust removing effect is increased from the dust removing device to achieve high cleanliness.

In the cyclone separator structure, the cyclone hopper 02 and the dust remover 05 separate particle waste materials with different sizes through graded filtration, the dust removing fan 04 and the dust remover 05 provide a double air draft function, so that the sufficient negative pressure can be formed in each dust removing link, and a stable air flow path is maintained by double air draft, and the air flow is effectively prevented from flowing back or accumulating.

To facilitate cleaning of the waste, in another example, as shown in fig. 9, the first conveyor assembly 22 further includes a third deslagging belt 223 and a fourth deslagging belt 224, the third deslagging belt 223 is connected to the first deslagging belt 221, the conveying direction of the third deslagging belt 223 forms an angle with the conveying direction of the first deslagging belt 221, the fourth deslagging belt 224 is connected to the second deslagging belt 222, the conveying direction of the fourth deslagging belt 224 forms an angle with the conveying direction of the second deslagging belt 222, and the third deslagging belt 223 and the fourth deslagging belt 224 facilitate guiding of the waste from below the screening device to the waste treatment area.

It will be appreciated that in the trommel separation process, as shown in fig. 7, the separation and recovery system further includes a feeding device, where the feeding device includes a first feeding component 71, a second feeding component 72 and a third feeding component 73, where a discharge end of the first feeding component 71 is connected to a feed inlet of the first screening component 11 to feed the material into the first screening component 11, a feed end of the second feeding component 72 is connected to a discharge inlet of the first screening component 11 to receive the material after the first screening, a discharge end of the second feeding component 72 is connected to a feed inlet of the second screening component 12 to feed the material after the first screening to the second screening component 12, and a feed end of the third feeding component 73 is connected to a discharge inlet of the second screening component 12 to receive the material after the second screening and to feed the material into the next process.

Partial system for treating air separation process

In the air separation process, as shown in fig. 10 and 11, the shredding device comprises a first shredding assembly 31 and a first feeding assembly 32, the first shredding assembly 31 adopts the design of a double-shaft shredder, materials enter the first shredding assembly 31 through a feeding hole, blades of the first shredding assembly 31 rotate to tear and cut the materials into small blocks, the shredded materials flow out through a discharging hole to form uniform fragments so as to enter the subsequent scattering device 1, and the shredded materials are quantitatively fed into the scattering device 1 in batches by the first feeding assembly 32, so that the materials are prevented from being piled up.

The scattering device 1 comprises a rotatable scattering device, a plurality of tooth plates are arranged on a rotating part of the scattering device, the materials after being torn up fall into the scattering device 1, the scattering device runs, and the scattering device pushes the materials to roll forwards and achieves the scattering effect.

As shown in fig. 10, the air chamber comprises a third box 51 and a fourth box 52, the third box 51 is communicated with a first air blowing component 53, the first air blowing component 53 is arranged on one side of the scattering device 1, when materials roll off from the scattering device, the first air blowing component 53 helps to blow the materials to advance, a first air flow area is formed in the third box 51, a feeding hole of a second air blowing component 54 is communicated with a discharging hole of the third box 51, a discharging hole of the second air blowing component 54 is communicated with a feeding hole of the fourth box 52, and the second air blowing component 54 sends the materials into the fourth box 52, and a second air flow area is formed in the fourth box 52.

Another example provides a box structure, as shown in fig. 10, in the third box 51, the third box 51 includes a first filter screen 511 and a first cleaning device 512, multiple groups of first filter screens 511 are arranged in the third box 51 in a spaced manner, the first cleaning device 512 is arranged between every two first filter screens 511 and is used for cleaning impurities attached to the first filter screens 511, the first filter screens 511 are used for separating a part of waste materials, in the fourth box 52, the fourth box 52 includes a second filter screen 521 and a second cleaning device 522, multiple groups of second filter screens 521 are arranged in the fourth box 52 in a spaced manner, the second cleaning device 522 is arranged between every two second filter screens 521 and is used for cleaning impurities attached to the second filter screens 521, and the second filter screens 521 are used for separating a part of waste materials.

As shown in fig. 10, the discharging device further includes a second dust removing assembly 23 and a second conveying assembly 24, the second dust removing assembly 23 is used for sucking dust generated in the blowing-assisted process, the second dust removing assembly 23 includes a third pipeline 231, a third dust remover 232, a third dust removing belt 233, a fourth pipeline 234, a fourth dust remover 235, a fourth dust removing belt 236, a fifth pipeline 237, a fifth dust remover 238 and a fifth dust removing belt 239, specifically, one end of the third pipeline 231 is communicated with the third dust remover 232, the other end thereof is communicated with the third dust remover 232, the third dust removing belt 233 is connected with the discharge end of the third dust remover 232, one end of the fourth pipeline 234 is communicated with the fourth box 52, the other end thereof is communicated with the fourth dust remover 235, the fourth dust removing belt 236 is connected with the discharge end of the fourth dust remover 235, one end of the fifth pipeline 237 is communicated with the fourth box 52, the other end thereof is communicated with the fifth dust remover 238, the fifth dust removing belt 239 is connected with the discharge end of the fifth dust remover 238, wherein the fourth dust remover 235 is combined with the fourth dust remover 52 in the fourth dust remover box 52; the second conveying assembly 24 comprises a fifth slag discharging belt 241, a sixth slag discharging belt 242 and a seventh slag discharging belt 243, the fifth slag discharging belt 241 is arranged in the third box body 51, receives the materials output by the scattering device 1 and the first air blowing assembly 53 and conveys the materials to the second air blowing assembly 54, the sixth slag discharging belt 242 and the seventh slag discharging belt 243 are arranged in the fourth box body 52, receives the materials output by the second air blowing assembly 54, wherein the conveying directions of the sixth slag discharging belt 242 and the seventh slag discharging belt 243 are opposite, the sixth slag discharging belt 242 is close to the second air blowing assembly 54, heavier waste materials (such as straws and cotton bolls) fall onto the sixth slag discharging belt 242 firstly due to larger inertia, the lighter materials (such as waste mulch film) fall to the seventh slag discharging belt 243 at a far position, so that the sixth slag discharging belt 242 and the seventh slag discharging belt 243 separate materials with different weights along opposite directions and respectively convey the materials to different collecting areas, thereby realizing clear grading effect.

It is contemplated that the second dust collection assembly 23 may take the cyclone configuration described above.

To facilitate cleaning of the waste, in another example, as shown in fig. 11, the second conveying assembly 24 further includes an eighth slag discharging belt 244, the eighth slag discharging belt 244 is connected to the sixth slag discharging belt 242, and a conveying direction of the eighth slag discharging belt 244 forms an angle with a conveying direction of the sixth slag discharging belt 242, so that the waste is led out from the fourth tank 52.

In order to further improve the purity of the material, as shown in fig. 11, a check assembly 25 is added, the inlet end of the check assembly 25 is connected to the outlet end of the eighth slag discharging belt 244, the outlet end of the check assembly is connected to the third box 51, the check assembly 25 absorbs the waste conveyed by the eighth slag discharging belt 244 and sends the waste into the third box 51 again, and the blowing-assisted separation is performed on the waste.

It will be appreciated that in the air separation process, as shown in fig. 10, the feeding device further includes a fourth feeding assembly 74 and a fifth feeding assembly 75, the first shredding assembly 31 is disposed at a discharge end of the fourth feeding assembly 74 and above the fifth feeding assembly 75, the first shredding assembly 31 puts the shredded materials at a feed end of the fifth feeding assembly 75, the first feeding assembly 32 is disposed on the fifth feeding assembly 75, and the materials are quantitatively conveyed in batches through the feeding assemblies in a conveying process of the fifth feeding assembly 75.

Partial system for treating mechanical friction washing separation process

In the mechanical friction washing separation process, before the materials enter the process, the sand, the straw, the cotton boll and other large-particle waste materials are removed, the waste plastic film surface is still attached with small-particle waste materials, as shown in fig. 12, the shredding device further comprises a unpacking component 33, a second feeding component 34 and a second shredding component 35, the unpacking component 33 unpacks the wrapped materials, the unpacking component 33 cuts or tears the wrappers in a cutting or rolling mode to release the internal materials, it is understood that if the materials are not packed, the materials can be directly thrown into the second feeding component 34 without unpacking, the second feeding component 34 controls the flow of the materials entering the second shredding component 35, specifically, the second feeding component 34 limits the flow of the materials passing through a rotary pulling piece, and the second shredding component 35 adopts the design of a crusher, and compared with the first shredding component 31, the second shredding component 35 carries out further shredding treatment on the materials, and the shredding degree is larger than that of the first shredding component 31.

As shown in fig. 12, the rubbing device includes a first rubbing component 61 and a second rubbing component 62, the crushed material firstly enters a rubbing cavity of the first rubbing component 61, a plurality of rotatable blades or brushes are arranged in the rubbing cavity and are used for contacting the material and applying friction force, the blades can be sequentially arranged and reversely rotated, or different angles are set to ensure that the material is rubbed and cleaned in all aspects so as to remove waste materials attached to the surface of the waste mulching film, the first rubbing component 61 and the second rubbing component 62 have the same structure, a discharge hole of the first rubbing component 61 is communicated with a feed hole of the second rubbing component 62, and the material subjected to first step rubbing enters the rubbing cavity of the second rubbing component 62 for deeper cleaning.

As shown in fig. 13, the screening device further comprises a third screening component 13, the third screening component 13 comprises a third air blowing component 131, a separating drum 132, a vibrating screen 133, a fourth air blowing component 134 and a fifth air blowing component 135, a feeding port of the third air blowing component 131 is connected with a discharging port of the second friction washing component 62, a discharging port of the fourth air blowing component 134 is communicated with the separating drum 132, a plurality of separating holes are formed in a wall surface of the separating drum 132, a first feeding port of the fourth air blowing component 134 is communicated with the separating drum 132, the vibrating screen 133 is arranged at a discharging port of the separating drum 132, the third air blowing component 131 supplies air to the separating drum 132, the fourth air blowing component 134 forms an exhaust for the separating drum 132, materials with a size smaller than that of the separating holes are sucked off from the separating drum 132 and fall on the vibrating screen 133 under the action of gravity, the vibrating screen 133 further screens the materials on the materials, a second feeding port of the fourth air blowing component 134 is communicated with a discharging port of the vibrating screen 133, light materials are sucked off from above, the heavy materials are sucked off from the separating drum 134, the fourth air blowing component 135 is left in the lower side, the fourth air blowing component is separated from the fourth air blowing component 135, the fourth air blowing component is communicated with the fifth air blowing component is again, the light materials are blown off the fourth air blowing component 135, and the fourth air blowing component is communicated with the fifth air blowing component is separated from the fourth air blowing component, and the fourth air blowing component is communicated with the fourth air blowing component, and the fourth air blowing component is separated from the fourth air blowing component and the air blowing component is separated.

It is contemplated that in one example, as shown in fig. 12, the cyclone structure described above is added between the second shredding assembly 35 and the first abrasive cleaning assembly 61. Specifically, the feed inlet of the cyclone is communicated with the discharge outlet of the third air blowing component 131, the third air blowing component 131 sends materials into the cyclone, and the discharge outlet of the cyclone is communicated with the feed inlet of the first friction washing component 61.

As shown in fig. 14, the discharging device further includes a third dust removing assembly 26 and a third conveying assembly 27, the third dust removing assembly 26 is used for sucking dust generated during the friction scrubbing and the second sieving process, the third dust removing assembly 26 includes a sixth pipeline 261, a sixth dust remover 262, a sixth dust removing belt, a seventh pipeline 264, a seventh dust remover 265 and a seventh dust removing belt, specifically, one end of the sixth pipeline 261 is respectively communicated with the open ends of the tops of the first and second friction washing assemblies 61 and 62, the other end thereof is communicated with the sixth dust remover 262, the sixth dust removing belt is connected with the discharge end of the sixth dust remover 262, the seventh pipeline 264 is communicated with the open end of the top of the third sieving assembly 13, the other end thereof is communicated with the seventh dust remover 265, the seventh dust removing belt is connected with the discharge end of the seventh dust remover 265, the third conveying assembly 27 includes a ninth slag removing belt 271 and a tenth slag removing belt 272, the ninth slag removing belt is connected with the discharge end of the first friction washing assembly 61, the waste material separated by the first friction washing assembly 61 is received, the tenth slag removing belt 272 is connected with the discharge end of the second friction washing assembly 62, and the waste material separated by the second friction washing assembly 62 is received by the discharge end 271.

It is contemplated that the third dust removal assembly 26 may take the cyclone configuration described above.

It will be appreciated that in the mechanical friction wash separation process, as shown in fig. 12, the loading apparatus further includes a sixth loading assembly 76 and a sixth air blowing assembly 77. Specifically, a feeding port of the sixth feeding assembly 76 is connected with a discharging port of the unpacking assembly 33, the second feeding assembly 34 is arranged on the sixth feeding assembly 76, a discharging port of the sixth feeding assembly 76 is connected with a feeding port of the second shredding assembly 35, unpacking assembly 33 puts unpacked materials on the sixth feeding assembly 76, the materials pass through the second feeding assembly 34 in the conveying process of the sixth feeding assembly 76, the materials are quantitatively fed into the second shredding assembly 35 by the second feeding assembly 34, an air outlet of the sixth air blowing assembly 77 is communicated with a discharging port of the second shredding assembly 35, and the sixth air blowing assembly 77 blows the materials output by the second shredding assembly 35 into the friction scrubbing device.

In another example, as shown in fig. 12, the feeding device further includes a heater assembly 78, where the heater assembly is disposed at an air outlet of the sixth air blowing assembly 77, and is used to heat the air flow output by the sixth air blowing assembly 77, and the hot air flow acts on the material output by the second shredding assembly 35, so as to dry and loosen the waste mulch film.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Reference numerals illustrate: first screening assembly 11, second screening assembly 12, third screening assembly 13, third air blowing assembly 131, separating drum 132, vibrating screen 133, fourth air blowing assembly 134, fifth air blowing assembly 135, first dust removing assembly 21, first transporting assembly 22, second dust removing assembly 23, second transporting assembly 24, check assembly 25, third dust removing assembly 26, third transporting assembly 27, first line 211, first dust remover 212, first dust removing belt 213, second line 214, second dust remover 215, second dust removing belt 216, first slag discharging belt 221, second slag discharging belt 222, third slag discharging belt 223, fourth slag discharging belt 224, third line 231, third dust remover 232, third dust removing belt 233, fourth line 234, fourth dust remover 235, fourth dust removing belt 236, fifth line 237, fifth dust remover 238, fifth dust removing belt 239, fifth slag discharging belt 241, third dust removing belt 237 a sixth slag discharging belt 242, a seventh slag discharging belt 243, an eighth slag discharging belt 244, a sixth pipeline 261, a sixth dust remover 262, a seventh pipeline 264, a seventh dust remover 265, a ninth slag discharging belt 271, a tenth slag discharging belt 272, a first branch 01, a cyclone 02, a second branch 03, a dust removing fan 04, a dust remover 05 and a dust removing belt 06, a first shredding assembly 31, a first feeding assembly 32, an unpacking assembly 33, a second feeding assembly 34, a second shredding assembly 35, a scattering device 1, a third box 51, a fourth box 52, a first blowing assembly 53, a second blowing assembly 54, a first filter net 511, a first cleaning device 512, a second filter net 521, a second cleaning device 522, a first abrasive cleaning assembly 61, a second abrasive cleaning assembly 62, a first feeding assembly 71, a second feeding assembly 72, a third feeding assembly 73, a fourth feeding assembly 74, a third abrasive assembly, A fifth feeding assembly 75, a sixth feeding assembly 76, a sixth blowing assembly 77, and a heater assembly 78.

Claims

1. The mulch multistage separation and recovery method is characterized by comprising the following steps of:

first screening a portion of the material for waste and first discharging said portion of the waste separated during said first screening;

first crushing and scattering the first discharged material, separating the material and a part of the waste by using assisted blowing and discharging a part of the waste separated in the assisted blowing process for the second time, and

And carrying out second crushing and friction scrubbing on the second discharged material, and carrying out second screening on a part of waste materials on the friction scrubbed material to obtain the mulching film separated from the waste materials.

2. The method of claim 1, wherein the first screening comprises:

A first step of screening and a second step of screening a portion of the waste material from the material;

When the first step of screening is carried out, screening the waste materials with the size smaller than the first preset size, and carrying out the second step of screening on the screened materials;

And during the second step of screening, screening the materials by waste materials smaller than a second preset size.

3. The method of claim 2, wherein the first draining comprises:

discharging a part of waste materials separated in the first screening process in a first step and discharging in a second step;

when the first step is discharged, sucking and removing waste materials separated in the first step screening process and discharging slag by a belt;

and when the second step is discharged, sucking and removing waste materials separated in the second step screening process and discharging slag by a belt.

4. The method of claim 1, wherein the blow-assist comprises:

Carrying out a first step of blowing-assisted and a second step of blowing-assisted on a part of waste materials on the scattered materials;

wherein, when the first step is assisted blowing, the assisted blowing is utilized to carry out unidirectional conveying on the materials, and the separation of a part of waste materials is realized on the materials in the conveying process;

and during the second step of blowing assisting, reversely conveying the separated materials and a part of waste materials, and respectively storing the materials and the waste materials.

5. The method of claim 4, wherein the second draining comprises:

discharging a part of waste materials separated in the blowing-assisted process in a third step and a fourth step;

wherein, when the third step is discharged, the waste materials separated in the first step blowing-assisting process are sucked and discharged by a belt;

And when the fourth step is discharged, sucking and removing the waste materials separated in the blowing-assisted process of the second step and discharging slag by a belt.

6. The method of claim 1, wherein the rubbing comprises:

the crushed materials are subjected to first-step friction scrubbing and second-step friction scrubbing;

wherein during the first step of friction scrubbing, the crushed materials are subjected to friction scrubbing;

and during the second scrubbing, the material scrubbed in the first step is scrubbed in a scrubbing way.

7. A mulch multistage separation recovery system, comprising:

Screening means for first and second screening of a portion of the waste material;

the discharging device is connected with the screening device and is used for carrying out first discharging on part of waste materials separated in the first screening process and carrying out second discharging on part of waste materials separated in the blowing-assisted separation process;

The shredding device is used for carrying out first shredding on the first discharged material and carrying out second shredding on the second discharged material;

The scattering device is used for scattering the first crushed materials;

A plenum for separating material and a portion of waste material using a blow-assist process, and

And the friction scrubbing device is used for scrubbing the materials after the second crushing.

8. The system of claim 7, wherein the screening device comprises:

A first screen assembly for first screening material for waste material of less than a first predetermined size;

a second screen assembly for a second step of screening the material for waste material smaller than a second predetermined size;

The discharging device comprises:

the first dust removal component is connected with the first screening component and the second screening component respectively and is used for sucking part of waste materials separated in the first screening process;

And the first conveying assembly is respectively connected with the first screening assembly and the second screening assembly and is used for discharging a part of waste materials separated in the first screening process.

9. The system of claim 7, wherein the plenum comprises:

a first air flow zone and a second air flow zone;

a first air-blowing assembly for providing an air flow separating material and waste in a first air flow zone;

The second air blowing assembly is used for providing air flow for separating materials and waste materials in a second air flow area;

the discharging device further comprises:

the second dust removing assembly is connected with the first airflow area and the second airflow area respectively and is used for sucking and removing a part of waste materials separated in the blowing-assisted process;

And the second conveying assembly is connected with the first airflow area and the second airflow area respectively and is used for discharging a part of waste materials separated in the blowing-assisted process.

10. The system of claim 7, wherein the friction washing device comprises:

The first friction washing assembly is used for carrying out first-step friction washing on the second crushed material;

The second friction washing assembly is used for carrying out second-step friction washing on the material after the first-step friction washing;

And the third screening assembly is used for carrying out second screening on the waste materials after friction washing.