Air separation device and method of garbage

Abstract

The invention relates to an air separation device for domestic garbage. The whole device comprises a preprocessing unit and an air separation unit, wherein the preprocessing unit contains a feed belt, a magnetic separator and a crusher, and the air separation unit comprises a charging belt, a dedusting filter cartridge, a first circulating fan, an air separation chamber, an air return pipeline, a first roller, a second roller, a second circulating fan, a heavy substance storage bin, an intermediate-weight substance storage bin, and a light substance storage bin. In the invention, the separation of the domestic garbage is realized by the following steps: the domestic garbage entering the magnetic separator for the magnetic separation through the feed belt, removing metal, after crushing the garbage entering the air separation chamber through the charging belt, the circulating fan controlling the an average section air speed in the air separation chamber of 8m / s, the air amount of 3400m<3> / h, separating the domestic garbage in the air separation chamber because of density variation; the heavy substance in the domestic garbage directly falling to the heavy substance storage bin because of large density; the heavy substance in the domestic garbage falling into the heavy substance storage bin after diversion under the joint action of the air force and the first roller, controlling the rotation speed of the first roller as 19rpm; while the light substance in the domestic garbage keeping on moving under the drive of the air force, and entering the light substance storage bin through a belt pulley under the drive of the second roller, controlling the rotation speed of the second roller as 38rpm, the returning air connecting the dedusting filter cartridge through the pipes for dust separation, then returning to the circulating fan.

Description

technical field [0001] The patent of the present invention relates to a winnowing device and method, in particular to a winnowing device and method for sorting heavy, medium-heavy and light waste from household waste. Background technique [0002] At present, a large amount of household garbage not only seriously affects people's lives, but also hinders the development of cities. The annual output of existing urban household garbage is close to 150 million tons, most of which are piled in the open air, seriously affecting the urban landscape and the health of residents. At the same time, domestic garbage is also a kind of resource, and some of it can be recycled. Therefore, the disposal of domestic waste should adhere to the goals of harmlessness, recycling and reduction. [0003] As we all know, the composition of domestic waste is very complex, with large differences in time and space, and it is difficult to deal with it. The treatment methods of domestic waste mainly in...

AI Technical Summary

Problems solved by technology

[0004] At present, in the winnowing device used for domestic waste treatment, there is only one stage of diversion drum for separating substances with different densities, which can only separate heavy and light substances, while the organic matter used for post-fermentation and other treatments belongs to medium and heavy substances. The traditional air separation device cannot effectively separate the medium-heavy substances and heavy substances in domestic waste

Most of the heavy substances in domestic waste are debris such as stones, which do not contain organic matter and are suitable for sanitary landfill treatment. If they are allowed to continue to be mixed with medium and heavy substances such as organic matter, it will also affect the subsequent treatment process

In the traditional method of winnowing domestic waste, usually without pretreatment processes such as magnetic separation and crushing, the mixed collected domestic waste is directly sent to the winnowing unit, resulting in high equipment load, low winnowing efficiency, and difficult equipment maintenance. Serious Problem

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