Method for preparing refuse derived fuel (RDF) raw material, bioorganic fertilizer raw material and inorganic building material raw material with refuse as raw material

Abstract

The invention discloses a method for preparing a refuse derived fuel (RDF) raw material, a bioorganic fertilizer raw material and an inorganic building material raw material with refuse as a raw material. The method includes the steps of refuse separation and breakage, drum screening, preparation of the RDF raw material, biological fermentation dehydration, preparation of the bioorganic fertilizer raw material and the inorganic building material raw material, and the like, the RDF raw material, the bioorganic fertilizer raw material and the inorganic building material raw material can be prepared at a time with the high-humidity mixed urban refuse as the raw material, refuse resources are sufficiently utilized, the environment pollution is reduced, the energy consumption is lowered, and harmless refuse processing is thoroughly achieved.

Description

technical field [0001] The invention relates to the technical field of urban garbage treatment, in particular to a method for preparing derived fuel RDF raw materials, bio-organic fertilizer raw materials and inorganic building material raw materials by using garbage as raw materials. Background technique [0002] Among the traditional garbage disposal methods, the sanitary landfill method: due to the large area occupied, the high disposal cost, and the waste of a large amount of land resources, the applicable value is gradually reduced. Composting method: Due to incomplete utilization of organic matter, complex fertilizer components, and small reduction, it will be gradually eliminated. The incineration of garbage has become the mainstream of the harmless treatment of urban domestic garbage because of its many unique advantages, mainly in the following aspects: 1. After the garbage is incinerated, the pathogens in the garbage are completely eliminated, and the harmful gases...

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 may 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:

[0015] Technical defect: This technology is mainly used in the raw material pretreatment process of all waste-to-energy plants. However, due to the large investment and large processing capacity of waste-to-energy projects, the amount of waste required is particularly large, so it is not suitable for use in small and medium-sized cities, and its scope of application is limited; In addition, due to the complex composition of the fuel produced, its storage and combustion conditions are harsh, so it is not suitable for ordinary industrial boilers

[0017] Technical defects: garbage treatment technology is incomplete, recycling is not thorough, about 70% of the total amount of high-humidity and perishable substances have not been effectively utilized, and the remaining substances are treated by conventional methods, which is costly and prone to secondary pollution

[0019] Technical defects: incomplete garbage treatment technology, incomplete recycling, a large number of substances with a water content of more than 50%, high drying costs for raw materials, high organic matter in ceramsite products, and low strength of ceramsite after roasting and puffing, which affects the scope of application , in addition to the complex composition of raw materials, the exhaust gas emission indicators in the roasting process are poor, polluting the environment

[0021] Technical defect: Garbage is one of the raw materials for ceramsite production, and the consumption is small. Because the average moisture content of the garbage is higher than 50%, the cost of the production process is high, and the exhaust gas emission indicators during the roasting process are complex, which pollutes the environment.

[0023] Technical defects: garbage treatment technology is incomplete, recycling is not thorough, non-combustible substances in garbage have not been fully recycled, a large number of substances with water content exceeding 50% are directly dried, raw material drying costs are high, garbage sorting process is not good Perfect, due to the existence of a certain amount of inorganic components in the finished product, the grade of activated carbon products is low, and the scope of market application is limited

[0025] 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

[0026] 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

[0027] 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

[0028] 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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