Compound modification method for optimizing thermal performance of refuse derived fuel

Abstract

The invention relates to compound modification method for optimizing the thermal performance of refuse derived fuel (RDF). The method comprises the steps of: (1) selecting initial refuse with a moisture content of less than 30wt%, adding a dewetting agent to the refuse, and conducting drying for 1-2 days; and (2) adding a solid combustible material and a combustion supporting agent into the dried refuse, and then mixing them evenly, thus obtaining the refuse derived fuel. The method provided by the invention can effectively regulate and control the heat value, and can reduce water and regulate the moisture content of RDF within 10-15%. With the moisture content controlled in the range, the cost can be low, and effective molding and preparation of RDF can also be ensured. With a heat value stabilized at 2000-3500kcal / kg, the refuse derived fuel can meet the demands of serving as a fossil alternative fuel.

Description

technical field [0001] The invention relates to a compound modification method for optimizing thermal performance of garbage-derived fuel, which belongs to the field of materials. Background technique [0002] Survey data show that more than one-third of the cities in the country are currently surrounded by garbage. The accumulative accumulation of urban garbage in the country has occupied more than 500 million square meters of land, and the annual economic loss is as high as 30 billion yuan. "Garbage siege" is not only an urban disease, but also spreads to rural areas. Most of the 40,000 townships and nearly 600,000 administrative villages across the country have no environmental protection infrastructure, and generate 280 million tons of domestic waste every year. "Garbage siege" is becoming more and more serious, but my country's current overall garbage disposal capacity is far from enough. Taking Wuhan City as an example, the designed total processing capacity of the e...

AI Technical Summary

Problems solved by technology

[0003] With the rapid advancement of the country's industrialization and modernization, the disposal of urban domestic waste has been deeply concerned by the country. At present, the domestic waste disposal method is mainly landfill, which seriously pollutes the urban environment and restricts the development of the city. It has become a considerable trend to prepare it into refuse-derived fuel (RDF) as an alternative fuel

However, this method belongs to the mechanical method of water removal, which has the disadvantages of high energy consumption, difficult operation, and inability to deal with a large amount of municipal solid waste; the patent "System for preparing waste-derived fuel from high calorific value components of domestic waste" uses high calorific value The components of paper, plastic and cloth are used for the preparation of waste-derived fuel. This method has great requirements on the sorting of waste, and the components with low calorific value are eliminated. Although the prepared RDF has a high calorific value, but Increased sorting power, not easy to use widely

In addition, some domestic garbage-derived fuels are prepared by adding high calorific value components such as coal. Although the high calorific value is guaranteed, this method only adds a single component and only plays a role in supplementary combustion.

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