Preparation method of city refuse incineration furnace granular fuel

Abstract

The invention discloses a produce method for grain fuel used in municipal refuse incinerator, which comprises: separating, breaking, draining, evaporating, secondary breaking, granulating and drying. This invention reduces the require to material, heat value and moisture, enlarges scope of application, cuts energy consumption and cost, decreases pollution greatly, and can be used to restart stop-production incinerator.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a production method of granular fuel for municipal solid waste incinerators. Background technique [0002] Municipal waste contains many organic substances that are easily fermented. Without treatment, it will produce odor and polluting leachate, which will affect the environment. In the traditional waste disposal methods, such as sanitary landfill method, it occupies a large area and has high disposal costs. It not only wastes a lot of land resources, but also brings environmental pollution, and its applicable value is getting lower and lower. This method has gradually Be eliminated; Another example is the composting method, which has incomplete utilization of organic matter, coupled with complex fertilizer components and small reductions, etc., and is gradually being eliminated. [0003] The harmlessness, reduction and energyization of urban w...

AI Technical Summary

Problems solved by technology

Now it is in the stage of development and research, the technology maturity is relatively low, and the operation effect of equipment is generally poor. The total number of operating factories accounts for less than 10% of the various waste disposal methods.

[0007] 1. Due to the high moisture content and low calorific value of domestic waste, it is necessary to add a large amount of combustion-supporting substances and heat supplementing substances;

[0008] 2. Affected by the particle size of garbage and the combustion characteristics of each component, the residence time of the incineration process is not easy to control, and the incomplete combustion is prominent, which not only increases the amount of slag discharge, but also affects the quality of exhaust emissions, and the heat energy utilization rate is low;

[0009] 3. Affected by the unstable components of the garbage, the temperature distribution in the furnace is uneven and the incineration quality is poor;

[0010] 4. After simple treatment, or even no treatment, the garbage directly enters the incinerator. The porosity in the furnace is low, and the filling factor of the furnace is large, so the degree of mixing with air is low, which is not conducive to combustion;

[0011] 5. Due to the large difference in ignition point after the original garbage is heated, it is prone to local collapse, which affects the oxygen supply and causes poor exhaust quality.

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