Method for one-step producing biomassfuel, biological haydite and active carbon using high wet mixed city garbage as raw material

Abstract

The process of producing biomass fuel, biological haydite and active carbon with city garbage with high water content as raw material includes the following steps: sorting and crushing garbage, drum screening, preparing biomass fuel, biologically fermenting and dewatering, preparing biological haydite and active carbon, etc. The present invention makes it possible to make best utilization of garbage resource.

Description

technical field [0001] The invention relates to the technical field of urban waste treatment, in particular to a method for one-time separation and preparation of biomass fuel, biological ceramsite and activated carbon from high-humidity mixed urban waste. 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. Garbage incineration has 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 generated during the bur...

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:

[0014] 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

[0016] 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

[0018] 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

[0020] 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.

[0022] 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

[0024] Technical defects: garbage treatment technology is incomplete, recycling is not thorough, non-combustible substances in garbage have not been effectively 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, the sorting process is complicated, the equipment is complicated, and the operating cost is high

[0026] 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

[0027] 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

[0028] 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

[0029] 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

Images