Automatic scraping device for waste plastic

Abstract

The invention relates to an automatic scraping device for waste plastic. The automatic scraping device for waste plastic comprises a body and a speed-adjusting motor, wherein the speed-adjusting motoris arranged on the body, and the body is of a box-type structure; a feeding port and a discharging port are formed in the body, and a heating and ironing roller set, a cutter flat roller set, and a scraping device for the waste plastic are arranged in the body. By scraping the surface of the waste plastic, pollution and aging layers are thoroughly removed, thereby improving the recycling value ofthe waste plastic in quality, and simultaneously solving the technical problems of severe environmental pollution and waste of resources due to the water washing process during the recycling processof waste plastic; secondly, the pollution and aging layers on the surface of the waste plastic are removed by a scraping method, thereby pioneering disassembling in the field of recycling of waste plastic, and simultaneously achieving an unexpected technical effect.

Description

technical field [0001] The invention relates to the technical field of the reproduction of waste and old plastics in the recycling and utilization of solid waste resources, and relates to a cleaning device for the reproduction of waste and old plastics, in particular to an automatic scraping and washing device for waste and old plastics. Background technique [0002] With the rapid development of my country's industrial economy and the continuous improvement of the degree of modernization, the number of scrapped household appliances and industrial enterprises in urban and rural residents has increased sharply, and the amount of waste plastics generated after the scrapping of electrical appliances and production equipment has increased, making the recycling of solid waste resources. The recycling of waste plastics in China has become an important part of the national urban mining strategy. [0003] Because waste plastics enter into recycling, they must be thoroughly cleaned fi...

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Problems solved by technology

[0005] However, the long-term use of this poor and backward recycling method has caused serious pollution and damage to the environment in our country.

In many places in Zhejiang Province, the hardest-hit area for solid waste recycling, one of the biggest sources of pollution was found to be a large amount of waste water containing heavy metals and oil pollution generated by the rinsing and processing of solid plastic waste. After more than ten years of unchanged waste plastic recycling and rinsing processing operations, These sewage containing heavy metal debris and bacteria pollute water sources and land during discharge. Although various environmental protection measures including water treatment are currently being carried out, it is still difficult to avoid continued pollution. Within a radius of 100 kilometers in these areas The water cannot be eaten, the soil cannot be planted, and the air cannot be breathed, which has caused a great threat to the life of the residents in the area.

[0006] In order to reduce the spread of pollution, the Ministry of Environmental Protection has recently imposed strict restrictions on the cleaning process of recycling waste plastics. Investigate criminal responsibility; waste plastics recycling and washing must be carried out in the waste plastics recycling industrial park specially set up by the local environmental protection department. Pollution is controlled within a certain range, but pollution sources and pollution still exist, and it is difficult to control with the sharp increase in the amount of waste plastics. At present, the environmental protection department's waste plastics reproduction control measures are also expedient measures.

[0007] As for the waste plastic recycling industry, due to the strengthening of the environmental protection management of the industry by the government departments, the reproduction cost of the waste plastic recycling enterprises has greatly increased; the utilization cost of the recycled raw materials of the waste plastic is getting higher and higher, which seriously threatens the survival of the industry.

[0008] Secondly, because electrical appliances and equipment are scrapped after being used for many years, the outer surface of many recycled waste plastics has been seriously aged and differentiated. These aged and differentiated outer surfaces not only have no recycling value, but also Will affect the quality and use value of recycled raw materials after recycling waste plastics

[0009] Due to the aging and differentiation layer of the outer surface of the recycled waste plastic, the dust, residual oil and other pollutants adsorbed on the surface during long-term use, most of these pollutions are adsorbed on the waste plastic during the long-term use of electrical appliances or equipment; Pollutants have been embedded in the aging and differentiation layers of these aging and decomposing plastics, and are mixed with the outer surface of these waste plastics, making it difficult to clean them with water. limited

[0010] At present, more than 80% of the waste plastics recycled by solid waste recycling companies are large pieces of sheet-shaped waste plastics with uniform thickness dismantled from plastic containers, large household appliances, and large-scale production equipment; due to the classification of these waste plastics For PET, PE, PP, PS, ABS, etc., these waste plastics with different classifications have different economic values. In the process of collecting these waste plastics, accurate classification can maximize the value of recycled raw materials for waste plastics; Restricted by production equipment and technical problems, they are not sorted before processing. The current recycling and processing methods for waste plastics are seriously unreasonable, resulting in a serious waste of resources.

Existing recycling companies wash, dry, and crush the recovered waste plastics into pieces, then sort them, heat and melt them, extrude them, and granulate them into recycled raw materials. After that, the accuracy of sorting is very low and has little effect. This production method cannot realize the maximum value utilization of the above-mentioned waste plastic resources.

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