Household garbage sorting process

Abstract

The invention relates to a household garbage sorting process. The household garbage sorting process comprises the following steps: after crushing garbage, performing biological drying treatment in the way that hot air is pumped in from the lower part of a material layer to heat up materials, the temperature is kept at 40-60 DEG C, natural fermentation is performed for 7-15 days, air extraction is performed at the upper part of the material layer to realize gas exchange, and gas is condensed to produce condensate water; after drying treatment, performing first-section roller screening, sorting magnetic materials out of the oversize material by a magnetic separator, then sorting out nonferrous metals by a vortex separator, after that, carrying out manual selection, and sorting chlorine-containing plastics out of the rest material by a photoelectric separator; and performing second-section roller screening on the undersize material subjected to the first-section roller screening, and sequentially sorting the oversize material by the magnetic separator, the vortex separator, manual selection and the photoelectric separator according to the process. By adoption of the sorting process, recyclable substances in household garbage can be maximally extracted, so that recycling is realized and pollution is avoided.

Description

technical field [0001] The invention relates to a garbage treatment technology, in particular to a domestic garbage sorting process. Background technique [0002] With the rapid development of my country's economy, the urbanization process is accelerating, and the amount of domestic waste is also increasing. At present, the annual output of domestic waste in my country exceeds 150 million tons. Most of this huge domestic waste is landfilled. From the perspective of resource recycling, it is not in line with the trend of sustainable development to dispose of domestic waste by landfill, which has caused serious pollution to the environment. Destruction, while a large number of renewable or reused resources are also wasted in the landfill process. [0003] At this stage, domestic waste is mainly disposed of in the world by incineration, which is also the domestic waste disposal method advocated by the Chinese government. However, since most domestic waste in our country is u...

AI Technical Summary

Problems solved by technology

However, since most domestic waste in our country is unsorted waste, which contains high water value and kitchen waste components, it has the characteristics of high moisture content, low calorific value, and miscellaneous components. Direct incineration of such domestic waste requires special care. Dispose of flue gas and fly ash, such incineration will cause serious air pollution

[0004] The problems caused by domestic waste treatment in my country are mainly due to the complex composition of domestic waste in China and the lack of garbage classification, which results in a single treatment method that is not suitable for mixed waste

my country also advocates waste classification, which can effectively deal with domestic waste. However, due to the lack of sound laws and regulations in our country and the low awareness of residents, it is very difficult to implement the method of classification of domestic waste at the source.

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