Double-layer mechanical grate type garbage gasification and incineration system and treatment method adopting same

Abstract

The invention discloses a double-layer mechanical grate type garbage gasification and incineration system. The system comprises a double-layer garbage gasification and incineration furnace, wherein the double-layer garbage gasification and incineration furnace comprises a feeding bin, a gasification furnace and an ash combustion furnace which is located right below the gasification furnace; the feeding direction of the ash combustion furnace is opposite to that of the gasification furnace; a stacking sealing section is arranged between the feeding bin and the gasification furnace; a residue pusher is arranged between the gasification furnace and the ash combustion furnace; exhaust gas outlets are formed in the upper end of the gasification furnace and the upper end of the ash combustion furnace; the double-layer mechanical grate type garbage gasification and incineration furnace further comprises a circular air supply system. The garbage treatment method comprises steps as follows: step A, furnace ignition and drying are performed; step B, garbage is combustedin a hearth of the gasification furnace; step C, continuous garbage gasification and incineration treatment is realized; step D, the double-layer mechanical grate type garbage gasification and incineration furnace shuts down after ash combustion. With the adoption of the double-layer mechanical grate type garbage gasification and incineration furnace for treating the garbage, the garbage treatment amount is large, the recovery efficiency of heat is relatively high, and pollutant emission can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of solid waste incineration treatment, and in particular relates to a double-layer mechanical grate type garbage gasification incineration system and a treatment method thereof. Background technique [0002] The existing waste treatment technologies mainly include incineration, sanitary landfill, composting, and waste recycling. Among the conventional waste treatment technologies, incineration has the advantages of obvious reduction effect, complete harmlessness, small land occupation, utilization of waste heat energy, and less secondary pollution, which meets the strategic requirements of my country's sustainable development. However, with the continuous improvement of environmental protection requirements at home and abroad, how to strengthen the control of secondary pollution is particularly important. Therefore, waste pyrolysis and gasification incineration technology is gradually pushed to the road of ...

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Problems solved by technology

[0007] 2. With the increasing amount of garbage generated and piled up like mountains, the amount of garbage treatment must be effectively increased in order to meet market demand

[0010] The existing waste gasification incinerators are as follows two invention patents: multi-column segmented drive compound domestic waste incinerator (ZL200710092508.9) and two-stage waste incinerator (ZL201010268376.2) Unsolved problems: garbage The heat treatment mode is relatively backward, it is only the process of drying-burning-burning, and solid combustion releases heat; the thermochemical reaction in the furnace is dominated by oxidation reaction, supplemented by reduction reaction, which is easy to produce secondary pollutants; when garbage is burned in the furnace, peroxygen The coefficient is large, the input of primary air and secondary air is large, and the dust content in the flue gas is high, which has a great impact on the heat energy recovery system and the flue gas treatment system. It is easy to accumulate dust, and the amount of flue gas is large, which reduces the heat conversion efficiency. ; There is no separate gasification furnace and ember furnace, and the garbage can only be processed in batches, and large-scale continuous gasification and incineration of garbage cannot be realized, and the amount of garbage treated is small

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