Pre-screening device and method of stale household waste

Abstract

The invention discloses a pre-screening device and method of stale household waste. The method comprises the following steps that the stable waste is excavated out of an excavating operation face andtransported to a treatment workshop; the stable waste is contained in a raw material conveying device, and continuous feeding is carried out; and the stable waste is conveyed to an n-shaped bar screen, waste screening is achieved through vibration of the bar screen, and the sorted waste is conveyed to respective collecting devices through a sorting and conveying device. The pre-screening device has the beneficial effects that n-shaped bars are stable in structure and cannot be bent easily, and materials cannot slide off easily; the interval of the bars can be adjusted at any time according toneeds, and screening of the waste of different specifications is achieved; soft materials prone to being wound and large hard materials in the waste can be screened out well, and the pressure of subsequent treatment equipment is reduced; compared with traditional smashing equipment, large removing equipment and the like, the treatment efficiency is improved by 50%, and the power is saved by 60%; the equipment blocking probability is reduced, the abrasion rate of the equipment is low, and the repairing and maintaining frequency is reduced; and the treatment equipment selectivity of the three types of screened materials is improved.

Description

technical field [0001] The invention belongs to the field of garbage treatment, and in particular relates to a pre-screening device and method for stale domestic garbage. Background technique [0002] Since the 1970s, my country has gradually begun to adopt landfill as a method of municipal solid waste disposal. However, as the amount of garbage increases every year, and a large number of landfills have reached or are about to reach saturation, the contradiction between the rapidly increasing amount of garbage and land resources has become increasingly prominent. Therefore, it is necessary to process the stale domestic waste in the landfill to make room for the landfill space. [0003] At present, there are mainly two ways to dispose of stale domestic waste: ex-situ relocation and in-situ treatment. In view of the environmental impact of stale waste, the comprehensive treatment of most domestic waste landfills adopts the technology of in-situ screening and off-site disposa...

AI Technical Summary

Problems solved by technology

However, there are the following technical problems in the current screening of stale domestic waste: (1) The traditional pre-screening equipment is mainly crushers and large-piece rejecting machines, which have problems such as poor pre-screening effect and easy material blockage; (2) ) Existing rod sieve sampling cylindrical rods cannot be extended too long, otherwise they are easy to bend, and the equipment wears heavily, which will affect the screening effect and efficiency; (3) The fixed distance between the rods cannot realize the screening of different types of garbage; ( 4) Soft materials are easy to slip on the round bar screen, resulting in soft materials that are easily entangled and large hard materials that are difficult to separate; (5) The amount of garbage pretreatment is small

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