Mechanical fire grate type rubbish gasification incinerator and dual-boiler energy-saving power generation system thereof

Abstract

The invention discloses a mechanical fire grate type rubbish gasification incinerator which is smaller in heat efficiency conversion loss and higher in heat recovery rate and a dual-boiler energy-saving power generation system of the mechanical fire grate type rubbish gasification incinerator. The mechanical fire grate type rubbish gasification incinerator comprises a gasification incinerator body, a boiler system, a circulation air supply system and a power generation system; the gasification incinerator body comprises a gasification boiler and a burning ash boiler which can be sealed or communicated; the boiler system comprises boiler bodies a and b, the boiler body a is provided with a cyclone burning chamber and boiler chambers a and b, the boiler body b is provided with a boiler chamber d and a cyclone dust removal chamber, water cooling walls are arranged in the cyclone burning chamber and the cyclone dust removal chamber, a superheater unit is arranged in the boiler chamber a, and an evaporator is arranged in the boiler chamber b; and a superheater unit and an evaporator are arranged in the boiler chamber d, steam pockets are arranged at the top ends of the two boiler bodies, a smoke inlet of the cyclone burning chamber is connected with a smoke outlet of the gasification incinerator body, and a smoke inlet of the cyclone dust removal chamber is connected with a smoke outlet of the burning ash boiler. The power generation system comprises a steam input pipe, a steam turbine and a power generator, and the steam input pipe is connected with the superheater units a and b and the steam turbine.

Description

Technical field [0001] The invention belongs to the technical field of solid waste incineration treatment, and in particular relates to a mechanical grate type garbage gasification incinerator and its double boiler energy-saving power generation system. Background technique [0002] The existing waste treatment technologies mainly include incineration, sanitary landfill, composting, and waste recycling. Among the conventional technologies for waste treatment, incineration treatment has the advantages of obvious reduction effect, thorough harmlessness, small land occupation, waste heat energy utilization, and less secondary pollution, which is in line with 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, gasification and incineration technology has been g...

AI Technical Summary

Problems solved by technology

At the same time, the fly ash content in the flue gas after incineration is high, the boiler ash is heavy, and the ash cleaning maintenance period is short

[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] Existing gasification incinerators, such as the following two invention patents: Multi-column segmented drive compound domestic waste incinerator (ZL200710092508.9) and two-stage waste incinerator (ZL201010268376.2) Unsolved problems: heat treatment of waste The mode is relatively backward, just drying-burning-burning, the process of solid combustion releasing 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, the peroxygen coefficient Large, large amount of primary air and secondary air supply, high dust content in flue gas, great impact on heat energy recovery system and flue gas treatment system, easy to accumulate dust, large amount of flue gas, reducing heat conversion efficiency; Without a separate gasification furnace and ember furnace, waste can only be processed in batches, and large-scale continuous gasification and incineration of waste cannot be realized, and the amount of waste treated is small

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