CN108099060B

CN108099060B - Scraping device of waste plastic scraping equipment

Info

Publication number: CN108099060B
Application number: CN201711449274.9A
Authority: CN
Inventors: 陆国君
Original assignee: Taizhou Jinfugui Renewable Resource Utilization Co ltd
Current assignee: Shanxi Zhihao Renewable Resources Recycling Co ltd
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2020-11-13
Anticipated expiration: 2037-12-27
Also published as: CN108099060A

Abstract

The scraping device is arranged behind the flattening slitting device and comprises a traction flat roller set and a scraper cutter set, the scraping device is a key component in automatic scraping series equipment, and a differentiated pollutant layer on the outer surface of a flattened slitting waste plastic strip is scraped and washed clean by a blade so as to avoid secondary pollution caused by water washing; thoroughly removing the polluted aging layer; therefore, the quality of the recycling value of the waste plastics is improved, the original disassembly is created in the field of waste plastics recycling, and meanwhile, unexpected technical effects are realized.

Description

Scraping device of waste plastic scraping equipment

Technical Field

The invention relates to the technical field of waste plastic reproduction in solid waste resource recycling, relates to cleaning equipment for waste plastic reproduction, and particularly relates to a scraping device of waste plastic scraping equipment.

Background

Along with the rapid development of industrial economy in China, the modernization degree is continuously improved, the scrappage quantity of household appliances and production equipment of industrial enterprises of urban and rural residents is increased sharply, the quantity of waste plastics generated after the electric appliances and the production equipment are scrapped is increased more and more, and the waste plastics in the recycling of solid waste resources become an important component of the national urban mineral production strategy.

Because the waste plastics are recycled, the waste plastics must be thoroughly cleaned, and a little residual pollution can seriously affect the quality and the utilization value of the processed recycled materials. The cleaning is a precondition that the waste plastics become industrial regeneration raw materials.

The current recycling production enterprises reproduce and process the recycled waste plastics: the method comprises the steps of firstly carrying out primary crushing, then washing with water, drying after washing, rolling into flakes, sorting, removing waste, finally heating and melting, extruding molten waste plastics through a plastic extruder, and then carrying out traction granulation to obtain the regenerated raw material.

However, the long-term use of the recycling method causes serious pollution and damage to the environment in China. In many places in Zhejiang province in serious disaster areas of solid waste recovery, one of the largest pollution sources is found, a large amount of waste water containing heavy metals and oil stains is generated by rinsing processing of solid plastic wastes, after ten years of invariable waste plastic recovery rinsing processing operation, the waste water containing heavy metal sundries and bacteria pollutes water sources and lands in discharge, at present, although various environmental protection treatment measures including water treatment and the like are carried out, continuous pollution is still difficult to avoid, water can not be eaten, soil can not be planted, and gas can not be breathed in square and hundred kilometers in the areas, and great threat is brought to the lives of residents in the areas.

In order to reduce the spread of pollution, the ministry of environmental protection of the state recently has strictly regulated and restricted the cleaning process of recycled waste plastics, and the ministry of environmental protection stipulates: strictly implementing an environment-friendly license management system for cleaning and reproducing the waste plastics, strictly forbidding private washing processing, and otherwise, pursuing criminal responsibility; the regeneration and cleaning of the waste plastics must be carried out in a waste plastics regeneration industrial park specially set by the local environmental protection department (the industrial park for the regeneration and cleaning of the waste plastics must be provided with system equipment reaching the regulation of the polluted water treatment); although the environmental regulations of government departments control environmental pollution to a certain extent, pollution sources and pollution still exist, and are difficult to control with the rapid increase of the production quantity of waste plastics, and the current waste plastic reproduction control measures of the environmental protection departments are also expedients without a way. .

For the waste plastic recycling industry, the regeneration cost of waste plastic regeneration enterprises is greatly increased due to the enhancement of environmental protection management strength of government departments in the industry; the recycling cost of the waste plastic is higher and higher, and the survival of the industry is seriously threatened.

Secondly, because electrical appliances and equipment are used for years and are scrapped, the outer surfaces of a plurality of recycled waste plastics are aged and differentiated seriously, the aged and differentiated outer surfaces have no recycling value, and the quality and the use value of recycled raw materials after the waste plastics are recycled are influenced without removing the aged and differentiated outer surfaces.

Due to the aging and differentiation layer on the outer surface of the recycled waste plastics, the surface of the recycled waste plastics adsorbs dust, residual oil stain and other pollution impurities in long-term use, and most of the pollution is adsorbed on the waste plastics in the long-term use process of electric appliances or equipment; pollutants are embedded into the aging layer and the differentiation layer of the aged and differentiated plastics and are mixed with the outer surfaces of the waste plastics into a whole, and the outer surfaces of other waste plastics are polluted by water-insoluble compounds such as paint and the like and are difficult to clean by water, so that the quality of the plastic regenerated raw materials produced and processed by water washing regeneration is low, and the utilization value is limited.

At present, more than 80 percent of waste plastics recycled by solid waste reproduction companies are large pieces of flaky waste plastics with uniform thickness which are disassembled from plastic containers, large household appliances and large production equipment; since the waste plastics are classified into PET, PE, PP, PS, ABS, etc., and the waste plastics classified differently have different economic values, accurate classification can maximize the value of the waste plastic recycled raw materials in the process of collecting the waste plastics; however, because the washing production equipment and technical problems of production enterprises are restricted, the waste plastics are not classified before processing, and the current reproduction processing mode of the waste plastics is seriously unreasonable, thereby causing serious waste of resources.

The existing waste plastic reproduction technology is disclosed in patent CN 1339351A; the recycling enterprises clean the recycled waste plastics with water, then dry and roll the waste plastics into chips, then carry out sorting process, and then heat and melt, extrude and granulate the waste plastics into regenerated raw materials; however, pollutants embedded in aged and differentiated plastic layers on the surfaces of the waste plastics cannot be cleaned completely by using water, chemical substance attachments such as paint and the like attached to the surfaces of the waste plastics cannot be cleaned, the sorting accuracy is low after the waste plastics are rolled into fragments, and the quality of the regenerated raw materials of the waste plastics is seriously influenced; the production method cannot realize the maximum value utilization of the waste plastic resources.

Disclosure of Invention

In order to solve the technical problems, the company develops a series of automatic scraping and washing equipment for waste plastics, and mainly aims at the reproduction and utilization of massive flaky shell waste plastics with uniform thickness which are disassembled from production equipment and facilities and account for 80 percent of scrapped electrical appliances recycled in the market at present; in the process of reproduction, waste plastics are classified according to the flatness of the recycled waste plastics, the surface aging and differentiation of the waste plastics, the degree of scratch pollution and the like, and the classified waste plastics are processed into the reproduction raw materials of the waste plastics by a scraping method by using serial automatic scraping equipment invented and developed by the company.

The waste plastic scraping and washing equipment comprises a machine body and a speed regulating motor, wherein the speed regulating motor is arranged on the machine body; the machine body is of a box-type structure, a feed inlet, a discharge outlet and a workbench are arranged on the machine body, the workbench is connected with the feed inlet, a flattening slitting device and a scraping device for waste plastics are arranged in the machine body, the flattening slitting device comprises a flattening flat roller, the flattening flat roller comprises an upper flattening flat roller and a lower flattening flat roller which are arranged in parallel up and down, at least three annular cutter blades are arranged on the axial circumference of at least one flattening flat roller, and a cutter groove matched with the cutter blades is arranged on the axial circumference of the other flat roller corresponding to the annular cutter blades; the flattening flat roller is connected with a speed regulating motor, so that the upper flattening flat roller and the lower flattening flat roller rotate oppositely, the scraping and washing device is arranged behind the flattening slitting device, and the scraping and washing device comprises a traction flat roller set and a scraper cutter; the traction flat roller group comprises an upper traction flat roller and a lower traction flat roller which are assembled up and down in parallel, the traction flat roller group is connected with a motor to enable the upper traction flat roller and the lower traction flat roller to rotate oppositely, the scraper cutter comprises an upper cutter and a lower cutter, the cutting edges of the upper cutter and the lower cutter are oppositely arranged, and the scraper cutter is arranged in parallel with the flattening flat roller and the traction flat roller; the connecting part of the blade connecting parts of the upper cutter and the lower traction flat roller of the upper traction flat roller and the lower flattening flat roller of the upper flattening flat roller are connected on the same plane; the flattening roller is a heating flattening roller and is fixed in the machine body by arranging a pressure adjusting device. The upper cutter comprises an upper scraping and washing blade and an upper scraping and washing shaft, the upper scraping and washing blade is arranged on the upper scraping and washing shaft, the lower cutter comprises a lower scraping and washing blade and a lower scraping and washing shaft, and the lower scraping and washing blade is arranged on the lower scraping and washing shaft; the scraper cutter is arranged on the machine body through an upper scraping shaft or/and a lower scraping shaft.

Large pieces of flaky waste plastics with uniform thickness disassembled from plastic containers, large household appliances and large production equipment; the waste plastics are classified into PET, PE, PP, PS, ABS and the like according to economic values, on the basis of the classification, the waste plastics are classified according to the surface aging and differentiation, scratch pollution degree, flatness and the like of the recycled waste plastics, and the classified waste plastics are subjected to anhydrous scraping and washing to reproduce raw materials according to the classification by using serial automatic scraping and washing equipment invented and developed by the company.

The working principle of the waterless scraping and washing regeneration raw material processing of the automatic scraping and washing equipment for waste plastics is as follows: the classified waste plastics are fed to a feeding port of the waste plastic automatic scraping and washing equipment, waste plastic sheets are flattened and/or ironed through a flattening and/or ironing device, and then the flattened and/or ironed straight waste plastic sheets are cut into regular waste plastic strips through a cutter device.

The width of the waste plastic strip is determined according to the material of the waste plastic, the more difficult the waste plastic strip to be scraped and washed is, the more thin the waste plastic strip is, the more the waste plastic strip is beneficial to scraping and washing processing; but can not be cut to be thinner than the thickness of the waste plastic strips, which can cause the waste plastic strips to be difficult to control when passing through the traction flat roller of the traction flat roller group, or to be cut by a scraper when in scraping, or to be pulled apart when passing through a scraping device; repeated experiments show that the distance between the annular cutting blades is reasonably set between 0.3 and 2 centimeters.

And (3) sending the waste plastic strips cut into rules into a scraper cutter through a traction flat roller set, and performing traction push-pull on the aged and polluted surfaces of the waste plastic strips on the cutting edges of the upper scraper and the lower scraper through the traction flat roller set to perform waterless scraping and washing on the aged, differentiated layers and polluted layers of the outer surfaces of the waste plastic strips. The traction push-pull speed of the waste plastic strips on the blade edge of the scraper is very important, the traction push-pull speed is too high, the waste plastic strips can slide on the blade edge of the scraper, the production efficiency is influenced due to too low speed, the waste plastic strips are easy to clamp on the blade edge of the scraper, the waste plastic strips which are out of the blade edge of the scraper can be broken, and the waste plastic strips behind the blade edge of the scraper block a scraper cutter; through repeated tests, the rotating speed of the outer circumference of the traction flat roller is determined to be reasonable in the range of 0.2 m to 1 m per second, the problems of local slipping and unclean scraping can be caused when the speed exceeds 1 m, and large resistance can be generated when the speed is lower than 0.2 m, so that the working efficiency of the traction flat roller is influenced.

However, the scraping device is a key component in automatic scraping series equipment, and a differentiated pollutant layer on the outer surface of the waste plastic strip after being flattened and cut into strips is scraped and cleaned by a blade so as to avoid secondary pollution caused by water washing; thoroughly removing the polluted aging layer; therefore, the quality of the recycling value of the waste plastics is improved, the original disassembly is created in the field of waste plastics recycling, and meanwhile, unexpected technical effects are realized.

The scraping device of the waste plastic scraping equipment is arranged behind the flattening slitting device and comprises a traction flat roller set and a scraper cutter set; the traction flat roller group comprises an upper traction flat roller and a lower traction flat roller which are assembled in parallel up and down, and the traction flat roller group is connected with a motor so that the upper traction flat roller and the lower traction flat roller rotate oppositely; the scraper knife group comprises an upper knife and a lower knife, the cutting edges of the upper knife and the lower knife are oppositely arranged, and the scraper knife group and the traction flat roller group are arranged in parallel. The scraper cutter group comprises a scraping and washing blade and a scraping and washing shaft, and the scraping and washing blade is arranged on the scraping and washing shaft; the scraper cutter is arranged on the machine body through a scraping shaft.

As a further modification, the scraping and washing device comprises a prewashing cutter set which is arranged at the front part of the scraper cutter set; the pre-washing cutter group is arranged between the front traction flat roller group and the rear traction flat roller group; the prewashing cutter group is arranged in parallel with the scraper cutter group and the traction flat roll; the prewashing cutter group comprises a prewashing blade and a prewashing shaft, the prewashing blade is arranged on the prewashing shaft, and the edge part of the prewashing blade is of a spine structure; the prewashing cutter group is arranged on the machine body through a prewashing shaft; the prewashing cutter group also comprises a prewashing upper cutter and a prewashing lower cutter; the pre-washing upper cutter and the pre-washing lower cutter are oppositely arranged on the cutting edge of the pre-washing blade.

As a further correction, the scraping and washing device also comprises a platform plate, wherein the platform plate is fixedly arranged between the front traction flat roller set and the rear traction flat roller set and is positioned on the same straight plane with the connection points of the upper traction flat roller and the lower traction flat roller; the middle position of the platform plate is provided with a working hole for scraping and washing the blade and/or the prewashing blade, the scraping and washing blade and/or the prewashing blade is arranged in the working hole, and the blade edge part of the scraping and washing blade and/or the prewashing blade is slightly higher than the plane of the platform plate.

As a further correction: the pre-washing blade is in a split strip-shaped structure; the strip-shaped prewashing blades are of elastic structures and are arranged on the prewashing shaft in parallel and tightly. The scraping and washing blade is of an elastic structure. An automatic pressure telescopic device is arranged between the upper cutter and the lower cutter.

As a further correction, an automatic pressure expansion device is arranged on the prewashing shaft.

As a further correction, the traction flat roller group is a rubber roller, and an automatic pressure expansion device is arranged between the upper traction flat roller and the lower traction flat roller.

As a further correction, the outer circumference of the set of drawing flat rollers rotates at a speed of 0.2 to 1 meter per second.

Drawings

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is an enlarged view of the prewash cutter set.

Fig. 3 is an enlarged view of the doctor blade group.

Fig. 4 is a schematic view of the whole structure.

1 machine body, 2 speed regulating motor, 3 material inlet, 4 material outlet, 5 flattening flat roller, 51 upper flattening flat roller, 52 lower flattening flat roller, 6 annular cutting blade, 81 upper cutter, 82 lower cutter, 811 upper scraping and washing blade, 812 upper scraping and washing shaft, 821 lower scraping and washing blade, 822 lower scraping and washing shaft, 883 washing blade, 884 prewashing shaft, 9 pressure regulating device, 10 workbench, 11 blower fan, 12 dust suction pipe, 13 dust collection box, 14 conveying belt, 15 conveying roller, 16 material collection box and 17 wheels.

Detailed Description

A scraping device of waste plastic scraping equipment is arranged behind a flattening slitting device and comprises a traction flat roller group 7 and a scraper cutter group 8; the traction flat roller group 7 comprises an upper traction flat roller 71 and a lower traction flat roller 72 which are assembled in parallel up and down, and the traction flat roller group 7 is connected with a motor to ensure that the upper traction flat roller 71 and the lower traction flat roller 72 rotate oppositely; the scraper knife group 8 comprises an upper knife 81 and a lower knife 82, the edges of the upper knife 81 and the lower knife 82 are oppositely arranged, and the scraper knife group 8 and the traction flat roller group 7 are arranged in parallel. The scraper knife group 8 comprises a scraping blade 811 and a scraping shaft 812, wherein the scraping blade 811 is arranged on the scraping shaft 812; the doctor blade 8 is mounted to the body 1 by means of a doctor shaft 812.

The scraping and washing device comprises a prewashing cutter group 88, and the prewashing cutter group 88 is arranged at the front part of the scraper cutter group 8; the prewashing cutter group 88 is arranged between the front traction flat roller group 7 and the rear traction flat roller group 7; the prewashing cutter group 88 is arranged in parallel with the scraper cutter group 8 and the traction flat roll; the prewashing cutter set 88 comprises a prewashing blade 883 and a prewashing shaft 884, the prewashing blade 883 is arranged on the prewashing shaft 884, and the blade part of the prewashing blade 883 is of a spine structure; the prewashing cutter group 88 is arranged on the machine body 1 through a prewashing shaft 884; the prewashing cutter set 88 also comprises a prewashing upper cutter 881 and a prewashing lower cutter 882; the pre-washing blades 883 of the pre-washing upper cutter 881 and the pre-washing lower cutter 882 are installed opposite to each other in edge.

As a further modification, the scraping and washing device further comprises a platform plate 41, wherein the platform plate 41 is fixedly arranged between the front traction flat roller group 7 and the rear traction flat roller group 7 and is positioned on the same straight plane with the connection point of the upper traction flat roller 71 and the lower traction flat roller 72; the middle position of the platform plate 41 is provided with a working hole 44 for a scraping blade 811 and/or a prewashing blade 883, the scraping blade 811 and/or the prewashing blade 883 are arranged in the working hole 44, and the blade edge parts of the scraping blade 811 and/or the prewashing blade 883 are slightly higher than the plane of the platform plate 41.

As a further correction: the pre-washing blade 883 is in a split strip structure; the strip-shaped pre-washing blades 883 are elastic structures and are arranged in parallel and tightly on the pre-washing shaft 884.

As a further correction: the scraping blade 811 is of an elastic structure. An automatic pressure expansion device 9 is arranged between the upper cutter 81 and the lower cutter 82.

As a further modification, an automatic pressure expansion device 9 is provided on the prewash shaft 884.

For further correction, the drawing flat roller group 7 is a rubber roller, and an automatic pressure telescopic device 9 is arranged between the upper drawing flat roller 71 and the lower drawing flat roller 72.

As a further correction, the outer circumference of the set of drawing flat rollers 7 is rotated at a speed of 0.2 to 1 meter per second.

The automatic scraping and washing series equipment invented and developed by the company can thoroughly remove the polluted aging layer by scraping and washing the surface of the waste plastics through the scraping and washing device; the method has the advantages that the quality of the recycling value of the waste plastics is improved, the technical problems of serious environmental pollution and resource waste caused by a washing process in the recycling process of the waste plastics are solved, the surface pollution and aging layer of the waste plastics are removed by a scraping method, the detachment is pioneered in the recycling field of the waste plastics, and unexpected technical effects are realized.

The invention has simple structure and few process steps, does not need to wash the waste plastic raw material, reduces the investment of cleaning equipment, reduces the recovery cost of the waste plastic, and increases the utilization rate and the economic value of the waste plastic raw material.

Claims

1. The utility model provides a scraping device of old and useless plastics scraping equipment, scraping device set up after the slitting device that flattens, its characterized in that: the scraping and washing device comprises a traction flat roller set (7) and a scraper cutter set (8); the traction flat roller group (7) comprises an upper traction flat roller (71) and a lower traction flat roller (72) which are assembled in parallel up and down, and the traction flat roller group (7) is connected with a motor to enable the upper traction flat roller (71) and the lower traction flat roller (72) to rotate oppositely; the scraper knife tool group (8) comprises an upper knife tool (81) and a lower knife tool (82), the cutting edges of the upper knife tool (81) and the lower knife tool (82) are symmetrically arranged relatively, and the scraper knife tool group (8) and the traction flat roller group (7) are arranged in parallel; the scraper knife tool group (8) comprises a scraping and washing blade (811) and a scraping and washing shaft (812), wherein the scraping and washing blade (811) is arranged on the scraping and washing shaft (812); the scraper cutter group (8) is arranged on the machine body (1) through a scraping shaft (812); the scraping and washing device comprises a prewashing cutter set (88), and the prewashing cutter set (88) is arranged at the front part of the scraper cutter set (8); the prewashing cutter group (88) is arranged between the front traction flat roller group (7) and the rear traction flat roller group (7); the prewashing cutter group (88) is arranged in parallel with the scraper cutter group (8) and the traction flat roll; the prewashing cutter group (88) comprises a prewashing blade (883) and a prewashing shaft (884), the prewashing blade (883) is arranged on the prewashing shaft (884), and the blade part of the prewashing blade (883) is of a spine structure; the prewashing cutter group (88) is arranged on the machine body (1) through a prewashing shaft (884); the prewashing cutter group (88) also comprises a prewashing upper cutter (881) and a prewashing lower cutter (882); the cutting edges of the prewashing blades (883) of the prewashing upper cutter (881) and the prewashing lower cutter (882) are oppositely arranged; the scraping and washing device also comprises a cutter washing platform plate (41), wherein the cutter washing platform plate (41) is fixedly arranged between the front traction flat roller set (7) and the rear traction flat roller set (7) and is positioned on the same plane with the middle point of the upper traction flat roller (71) and the lower traction flat roller (72); wash intermediate position of sword platform board (41) and leave work hole (44) of scraping and washing blade (811) and prewashing blade (883), scrape and wash blade (811) and prewashing blade (883) and install in work hole (44), the blade portion of scraping and washing blade (811) and prewashing blade (883) is higher than the plane of washing sword platform board (41) a little.

2. The scraping device of waste plastic scraping equipment as claimed in claim 1, wherein: the pre-washing blade (883) is in a split strip structure; the strip-shaped prewashing blades (883) are of elastic structures and are arranged on the prewashing shaft (884) in parallel and closely.

3. The scraping device of waste plastic scraping equipment as claimed in claim 1, wherein: the scraping and washing blade (811) is of an elastic structure.

4. The scraping device of waste plastic scraping equipment as claimed in claim 1, wherein: an automatic pressure telescopic device (9) is arranged on the scraping and washing shaft (812).

5. The scraping device of the waste plastic scraping equipment as claimed in claim 1, characterized in that an automatic pressure telescoping device (9) is arranged on the prewashing shaft (884).

6. The scraping device of waste plastic scraping equipment as claimed in claim 1, wherein: the traction flat roller group (7) is a rubber roller, and an automatic pressure telescopic device (9) is arranged between the upper traction flat roller (71) and the lower traction flat roller (72).

7. The scraping device of waste plastic scraping equipment as claimed in claim 1, wherein: the outer circumference rotating speed of the traction flat roller group (7) is 0.2-1 meter per second.