Method for sorting waste paper pulp, plastic and dust impurities from urban garbage

Abstract

The invention discloses a method for sorting waste paper pulp, plastic and dust impurities from urban garbage. The method comprises the following steps: firstly, carrying out sterilization and deodorization on the garbage, then putting the processed mixed garbage into clean water, adequately stirring the mixed garbage by utilizing a hinge type stirrer, and standing for a plurality of minutes so as to separate light plastic (such as films and foams) from the mixed garbage; secondly, adding a hydrogen dioxide solution into a precipitated mixture of the paper pulp, dust and other heavy plastic (such as rigid plastic fragments), and continuously stirring by utilizing the stirrer, so as to separate the paper pulp from the mixture; finally, separating the dust from the mixture of the heavy plastic and dust particles by utilizing a slag separator, so as to obtain the heavy plastic. According to the method, the high-purity paper pulp and plastic products can be further respectively obtained when dust impurities are removed and can be further machined into secondary fibers and regenerated plastic particles; the repeated recycling of garbage resources is realized, and the comprehensive utilization ratio of urban garbage raw materials is substantially increased.

Description

technical field [0001] The invention relates to a process for separating and sorting three components of waste paper pulp, plastics and lime-soil impurities from urban garbage, in particular to a separation method for waste paper pulp, plastics and lime-soil impurities in urban garbage. Background technique [0002] In densely populated cities, waste disposal has always been a thorny issue. Common way is to send to landfill after collecting, or burn with incinerator. But it creates environmental problems, and ending overconsumption can further reduce landfill saturation. Improper disposal of waste in landfills pollutes groundwater and emits odors, and many cities are running out of landfill space. Incineration inevitably produces toxic gases that harm living organisms. [0003] At present, the world produces 490 million tons of waste every year, and China alone produces nearly 150 million tons of urban waste every year. The average annual growth rate of garbage in the wo...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficult problem of sorting plastic and waste paper raw materials in the current municipal solid waste treatment, the purpose of the present invention is to provide a sorting method for waste pulp, plastic and dust impurities in municipal solid waste, which has good separation purity and is easy to operate It is suitable for the sorting process of plastics and waste paper in municipal solid waste. The process does not produce secondary pollution, and realizes the recycling of municipal solid waste resources.