Residual film recovery method and recovery unit

Abstract

The invention relates to the field of agricultural mulching film cleaning, recovery and reutilization, overcomes the defects in the prior art, and provides a residual mulching film recovering method and a residual mulching film recovering machine set capable of recovering residual mulching films left on the ground surface and buried under the ground surface. The method concretely comprises the following steps that a soil layer with residual mulching films at the ground surface is scarified; the scarified soil and the residual mulching films are scooped up; the scooped soil and residual mulching films are flapped so that the residual mulching films fall off from the soil, and in addition, the residual mulching films and the soil are centrifugally separated; finally, the residual mulching films are collected. The method and the machine set have the advantages that the ground surface soil layer buried with the mulching films is directly scarified, then, the scarified soil is collected together with the turned residual mulching films, mixtures of the soil and the residual mulching films are subjected to centrifugal separation, and finally, the separated mulching films are collected.

Description

technical field [0001] The invention relates to the field of agricultural plastic film cleaning, recovery and reuse, and more specifically relates to a method for recovering residual plastic film and a recovery unit. Background technique [0002] Thirty years ago, the promotion of agricultural mulch film helped increase China's agricultural production and income. At present, my country's plastic film technology development and the use of covering plastic film have ranked first in the world. With the continuous promotion and application of agricultural mulch over the years, more and more mulch remains in the farmland, which cannot be degraded under natural conditions for hundreds of years, seriously polluting the environment. The hazards of residual plastic film are mainly manifested in the following aspects: first, destroying the soil structure, affecting the quality of cultivated land and the air permeability and water permeability of the soil, resulting in a decrease in c...

AI Technical Summary

Problems solved by technology

[0007] Even if the biodegradable mulch can be completely degraded, the application of the new mulch cannot reduce the waste film that has remained in the farmland, that is, the application of the new mulch cannot solve the problem of the mulch that has caused serious land pollution.

[0008] 2. The combination of manual and mechanical recycling takes a lot of manpower and material resources to recover the residual mulch film on the soil surface by hand or rakes. The existing recycling waste film machinery is mainly multi-layer comb rake or ring rolling nail-tooth type pulled by tractors. Residual mulch removal machine, there are also some new types of waste film machinery to recycle the mulch buried in the soil (0~8cm depth)

With the extension of the land cultivation period, the amount of residual mulch film in the farmland will increase rapidly, and the land will not be cultivated after 50 years. Even now, the survival rate of crops will decline with the increase of the content of mulch film in the soil.

Images