Wet separation method for domestic garbage

Abstract

The invention relates to a water selection method for domestic waste, which includes the following steps: (1) ragging, wherein, massive recoverable materials and other materials are separately sorted out; (2) crushing; (3) natural floatation, wherein, materials after crushing are put into water and left standing, and materials with a specific gravity lighter than that of water float up onto the water surface naturally; (4) air floatation, wherein, air is inflated from a bottom, bubbles attached to material pellets are formed, and secondary light materials which have a lighter specific gravity float up onto the water surface by carrying the bubbles; (5) swirl separation, wherein, the swirl is formed in the water, heavy materials with a larger specific gravity are left at the water bottom, middle materials which are lighter than the heavy materials flow together with the water under the impact of the swirl, and the middle materials and the heavy materials are separately screened and filtered from the water; and (6) flocculating settling, wherein, a flocculant is added in so as to carry out the flocculating settling to the water, sludge in the water is sunk at the water bottom, and upper clean water is recycled. The water selection method of the invention effectively classifies the domestic waste into a plurality of types according to the difference of quality and density, thus providing favorable conditions for recycling domestic waste.

Description

technical field [0001] The invention relates to a treatment method for solid waste, in particular to a water separation method for domestic garbage, and belongs to the technical field of environmental protection. Background technique [0002] Most of the solid waste in urban living quarters is the garbage generated by ordinary residents in daily life, mainly including waste paper, plastic, metal, glass, ceramics, dust, food waste, etc. Due to the complex composition of these solid waste, it is difficult to unify At present, the recycling and utilization of waste are basically treated by landfill and incineration. These treatment methods have insurmountable defects. The danger of pollution, it is difficult to find suitable landfill sites for many large and medium-sized cities; for incineration, the construction and operation costs of incineration facilities are relatively high, energy consumption is required, and there is still smoke pollution. Continuously develop new incin...

AI Technical Summary

Problems solved by technology

[0002] Most of the solid waste in urban living quarters is the garbage generated by ordinary residents in daily life, mainly including waste paper, plastic, metal, glass, ceramics, dust, food waste, etc. Due to the complex composition of these solid waste, it is difficult to unify At present, the recycling and utilization of waste are basically treated by landfill and incineration. These treatment methods have insurmountable defects. The danger of pollution, it is difficult to find suitable landfill sites for many large and medium-sized cities; for incineration, the construction and operation costs of incineration facilities are relatively high, energy consumption is required, and there is still smoke pollution. Continuously develop new incineration technology and flue gas treatment technology, but this inherent defect of converting one pollution method to another pollution method is still impossible to fundamentally overcome, so in view of the complexity of domestic waste components, the domestic waste According to the difference in mass density, it is sorted into several different types of materials, and it is very necessary to recycle these different materials

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