RDF (Refuse Derived Fuel) off-line burning technology and system

Abstract

The invention relates to an RDF (Refuse Derived Fuel) off-line burning technology and system. According to the RDF (Refuse Derived Fuel) off-line burning technology, an off-line burning furnace for burning RDF is arranged outside a cement kiln decomposing furnace. The RDF off-line burning technology is characterized in that the RDF and a part of cement raw material powder are put into the off-line burning furnace and are burned, meanwhile, kiln hood tertiary air is fed into a furnace body of the off-line burning furnace so as to ensure that the RDF is burned at a high temperature, and meanwhile, oxygen is supplied for the burning of the RDF; a blower device is used for blasting from the bottom of the off-line burning furnace, so that the RDF and the cement raw material powder are suspended in the furnace body of the off-line burning furnace; waste gas generated in the off-line burning furnace through burning, another part of cement raw material powder and low-density fly ash generated after the RDF is burned are directly fed into the cement kiln decomposing furnace and are decomposed and burned, and high-density waste residues generated by the off-line burning furnace and hot raw materials enter a feed-end chamber together and are calcined to become clinker. The low-nitrogen combustion can be realized in the cement kiln decomposing furnace. The burning temperature in the off-line burning furnace reaches up to 1000 to 1200 DEG C, so that the RDF is fully and effectively burned, and the generation of dioxin is avoided; meanwhile, the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of domestic waste treatment, in particular to a system and process for treating domestic waste by using a cement rotary kiln. Background technique [0002] With the acceleration of the urbanization process, the output of urban domestic waste in our country continues to increase, which has brought serious harm to the society. How to deal with the increasing municipal solid waste has become a major research topic in China today. At present, the main treatment methods of domestic waste include landfill, composting, incineration, and classified recycling, and the comprehensive utilization of RDF (refuse derived fuel) technology. [0003] The traditional way of disposing of municipal solid waste in China is the landfill method, which is more suitable for a small amount of domestic waste in small cities. The disadvantage of landfilling is that it takes up a lot of valuable land resources, and the garbage disposa...

AI Technical Summary

Problems solved by technology

[0007] 1. High moisture and low calorific value may affect the firing temperature in the cement rotary kiln;

[0008] 2. Some difficult-to-burn materials may not burn through;

[0009] 3. Most of the ash after incineration is large-sized particles, which are easy to form balls in the cement kiln and affect the quality of cement clinker

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