Method for preparing regeneration pellet fuel of urban household garbage

Abstract

The invention provides a method for preparing the regeneration pellet fuel of urban household garbage, which adopts the following steps of: comprehensive treatment of household garbage, burdening, secondary mixing and crushing, material drying, fuel forming, cooling and packaging and the like. The regeneration pellet fuel of the urban household garbage prepared by the method has the advantages that: the burdening process is adopted in the process of preparing garbage fuel to balance a heat value of the garbage fuel; the garbage fuel is prepared by adopting fully-mechanized assembly line operation, the process of garbage disposal has no phenomenon of material retention, no secondary pollution and no generation of garbage percolate and reduces mosquitoes and flies and the stench grade to the lowest limit, and simultaneously, the heat value of combustible matters in the processing process is not lost basically; and the fuel is dried first before forming, and has the high heat efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of urban household garbage regenerated particle fuel. Background technique [0002] At present, my country's urban domestic waste is increasing at a rate of 10% every year, while the simple disposal of urban waste accounts for only 2.3% of the total. Since the per capita available land in my country is less than 3.85% of that in the United States, my country's garbage dump stock over the years has been Up to 6 billion tons, occupying 500 million square meters of arable land, and direct economic losses of 8 billion yuan. The number of cities across the country has grown to 660, of which 200 have been surrounded by garbage. Based on the urban population of 260 million, each person generates 440 kilograms of garbage every year, and the amount of garbage generated is 114 million tons, which can cover a city with a population of 1 mill...

AI Technical Summary

Problems solved by technology

[0005] ① Mixed and received components are complex, and the content of bags is high; general methods cannot be normally and effectively classified

Separation and dehydration are more difficult; improper treatment will consume more energy

[0007] ③The content of perishable substances is high; improper handling causes serious secondary pollution; meanwhile, the safety and commerciality of garbage recycling products are poor

[0016] Its main technical defects: the mixed combustion of RDF and coal has been successful in foreign countries; and because the pyrolysis steam generated by RDF in the combustion process has a high incineration temperature; Low-quality coal with a high ignition point has a better combustion-supporting effect

[0021] 1). According to the characteristics of Chinese garbage; kitchen wastes account for more than 60% of the mass of garbage; and they are mixed and received in bags; the separation and processing process is difficult to control

[0022] 2). The quality of compost, another recycling product of garbage disposal, is difficult to stabilize; the scope of application is narrow, the sales market is small, and the price is low

Cause serious backlog, affect the operation of the whole production line

[0023] 3) The technical route is complex; there are many devices and equipment but the amount of individual recycling is small; the operating cost of the equipment is much higher than the recycling output value of the product, and it is difficult to achieve profitability

[0024] 4) Lack of high-efficiency special processing equipment guarantee, the existing processing equipment is a substitute for mining equipment, poor in adaptability, high in operation failure, and seriously insufficient in operating rate

[0025] 5) The operating environment of the factory is harsh; the discharge of three wastes is relatively large, and if discharge standards are required, the treatment costs for normal operation are relatively high

[0033] 1. Using the method of draining and evaporating to remove water has a long cycle, a large amount of odorous gas emissions, a large amount of landfill leachate, and the high content of COD and BOD in the leachate. The treatment cost is high

[0034] 2. The fermentation process degrades a large amount of plant-like organic matter, resulting in a large loss of calorific value

[0035] 3. Due to changes in receiving places and seasons, the composition of garbage is quite different, and the calorific value of the fuel produced by it has a large deviation, and the operating conditions of the incinerator are extremely unstable.

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