System for preparing granular fertilizer by dry anaerobic digestion of biogas residues of kitchen garbage and operation process

Abstract

The utility model relates to a system for preparing a granular fertilizer by dry anaerobic digestion of biogas residues of kitchen garbage, which is formed by connecting an impurity removal crushing system, a dehydration and aging system and a guniting, drying and granulating system, wherein the impurity removal crushing system is formed by connecting a spiral impurity removal machine and a wet ball-milling crusher, the dehydration and aging system is formed by sequentially connecting a plate frame dehydrator, a crusher and a stack turning and aging stacking bin, and the guniting, drying and granulating system is formed by connecting a blending tank, a guniting, granulating and drying machine, a cooling and screening machine, a crusher and a coating machine. According to the system, the granular fertilizer is produced by utilizing impurity removal, crushing, aging, guniting, drying and granulating processes, so that the problems of low resource rate, land resource occupation and the like of traditional treatment are solved, and the system is applied to kitchen garbage resource utilization engineering.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and in particular relates to a granular fertilizer system and an operation process for dry anaerobic digestion of kitchen waste to digest biogas residues. Background technique [0002] Kitchen waste mainly comes from pre-meal and post-meal waste generated by household life, which belongs to perishable organic waste from domestic sources, with a solid content of 20-30%. At present, due to the high solid content of kitchen waste, dry anaerobic treatment is one of the main treatment methods. However, because its digestion residue contains debris such as broken glass and plastic, which affects its soil application effect, it is often disposed of by incineration or landfill after dehydration. However, the disposal technology of incineration or landfill cannot make full use of the rich nutrients in the biogas residue, and at the same time consumes energy, occupies land and other shortcomings...

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to propose a granular fertilizer system for dry anaerobic digestion of kitchen waste, which uses impurity removal, crushing, stale and spray drying granulation processes to produce granular fertilizers, solving the problem of traditional disposal resources Low recycling rate, occupation of land resources, etc., to be applied to kitchen waste resource utilization projects

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