A kind of solid waste treatment method

Abstract

The invention relates to a solid waste processing method. The solid waste processing method includes the following steps: (1) particle soil with the solid waste weight being not smaller than 5% is added into solid waste; (2) a mixture obtained in the step (1) is burnt through dying fire under the condition that the temperature is not lower than 800 DEG C. By means of the solid waste processing method, on one hand, hazardous substance in gas generated through dying fire burning of the solid waste can be reduced, and tail gas generated through dying fire burning is easily processed so as to reach the standard to be discharged; on the other hand, heavy metal can be solidified in the particle soil, the leached heavy metal is less, residues obtained after dying fire burning can serve as a mixing material for producing concrete.

Description

technical field [0001] The invention relates to a solid waste treatment method, which belongs to the field of solid waste treatment. Background technique [0002] Garbage pollution is a major "disease" faced by most cities in the world. Only my country produces more than 100 million tons of garbage every year (for example, according to statistics, it reached 154 million tons in 2008, and 154 million tons of garbage is only the statistical data of 655 cities), and it is growing rapidly. This does not include the amount of garbage generated in rural areas, and the growth rate can be imagined. If this problem cannot be effectively resolved, it will have a serious negative impact on China's sustainable high-speed growth. [0003] At present, the municipal solid waste treatment methods widely used at home and abroad mainly include sanitary landfill, high-temperature composting and incineration. [0004] Landfill is currently the most commonly used waste disposal method in my c...

AI Technical Summary

Problems solved by technology

But there are also a series of problems: a lot of land resources are consumed, and it is now difficult for many cities to find new landfills; a large amount of leachate is produced, and most landfills have leachate pollution problems, etc.

[0007] However, the incineration treatment method that handles domestic waste better in foreign countries cannot be well used in China at present.

The reasons are as follows: 1. The imported technology is expensive; 2. It is difficult to adapt to the national conditions of our country

At present, the research on my country's garbage itself is not deep enough, so that even if the directly imported grate furnace incineration treatment is not pre-sorted, the composition is complex, the calorific value is low, the moisture content is high, and the variation range is large. When it comes to domestic waste in China, the effect of incineration treatment is not ideal; 3. The operating cost of incineration treatment method is also relatively high, which is unacceptable for most Chinese towns whose economic strength is not strong enough

In addition, foreign grate furnace incineration technology usually uses oil to support combustion, which has high operating costs and requires high government subsidies

Images