Method for preparing sludge derived fuel RDF, bio-organic fertilizer and inorganic building materials with garbage served as raw material

Abstract

The invention discloses a method for preparing a sludge derived fuel RDF, a bio-organic fertilizer and inorganic building materials with garbage served as the raw material. The method includes the steps of sorting and crushing of garbage, rolling screening, preparation of the sludge derived fuel RDF, biological fermentation dehydration, preparation of the bio-organic fertilizer and the inorganic building materials and the like. The high-humidity mixed urban garbage serves as the raw material to prepare the sludge derived fuel RDF, the bio-organic fertilizer and the inorganic building materials at a time, garbage resources are fully utilized, environmental pollution and energy consumption are lowered, and garbage treatment harmlessness is achieved thoroughly.

Description

technical field [0001] The invention relates to the technical field of urban garbage treatment, specifically a method for preparing derivative fuel RDF, bio-organic fertilizer and inorganic building materials at one time by using high-humidity mixed urban garbage as raw materials. Background technique [0002] Among the traditional waste disposal methods, the sanitary landfill method: due to the large area, high processing costs, and waste of a lot of land resources, the applicable value gradually decreases; the composting method: due to incomplete utilization of organic matter, complex fertilizer components, and reduced Factors such as smaller size will be gradually eliminated; garbage incineration will become the mainstream of harmless treatment of municipal solid waste because of its many unique advantages. The main manifestations are as follows: 1. After the garbage is incinerated, the pathogens in the garbage are completely eliminated, and the harmful gas and smoke gene...

AI Technical Summary

Problems solved by technology

[0006] ① Mixed and received ingredients are complex, and the contents of bags are high, so the general method cannot be normally and effectively classified;

[0007] ②Large moisture content: average moisture content is 50%, limit moisture content is as high as 70%; low calorific value: kitchen waste and dregs are high in content, accounting for about 50% on average, separation and dehydration are difficult, and processing energy consumption is relatively high;

[0008] ③The content of perishable substances is relatively high, and improper handling can easily cause serious secondary pollution. At the same time, the safety and commerciality of waste recycling products are poor. The typical components are shown in the following table:

[0021] 1. Poor technical integration, only selective recycling of garbage, single product types, limited by this, the existing technology has shown in engineering applications, small scale, high recycling costs, and the treatment of residues after garbage sorting Disposal costs are high, secondary pollution is generated in the production process, the level of resource utilization and reuse is low, and environmental protection projects are not environmentally friendly

[0022] 2. The waste sorting and sorting technology is backward, resulting in a large investment in equipment and labor in this process, low sorting efficiency, low recovery rate of usable materials, low purity, increased product production costs, low quality of finished products, and low resource recycling rate , it is difficult to reflect the recycling benefits

[0023] 3. The processing of the sorted raw materials adopts the process of drying first and then crushing. The production process requires a large investment in equipment and high energy consumption, which affects the popularization and application of the technology

[0024] 4. The potential danger of various pathogenic microorganisms in the garbage to operators is not considered in the production and processing process, and the sanitation and safety conditions are poor

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