Mechanical grate type waste gasifying incinerator and boiler power generation system thereof

Abstract

The invention discloses a mechanical grate type waste gasifying incinerator which is smaller in heat conversion efficiency loss and is higher heat recovery efficiency, and a boiler power generation system thereof. The mechanical grate type waste gasifying incinerator comprises a gasifying incinerator, a boiler system, an air supply system and a power generation system, wherein the gasifying incinerator comprises a gasifier and an incinerator, the gasifier and the incinerator can be sealed or communicated, and an upper end of the gasifier and the incinerator are respectively provided with a smoke outlet; the boiler system comprises a boiler body, the boiler body is provided with a cyclone combustion chamber, a furnace chamber a and a furnace chamber b which are communicated with one another, a water-cooled wall is arranged in the cyclone combustion chamber, superheaters are arranged in the furnace chamber a, an evaporator is arranged in the furnace chamber b, and a top end of the boiler body is provided with a steam drum; the power generation system comprises a steam turbine, a power generator and a steam input pipe, an output end of the steam turbine is sequentially connected with a condenser, a water pump, a low-pressure steam water heater, a deaerator, a booster pump and a high-pressure steam water heater, and first-stage and second-stage water-steam separators and first-stage and second-stage high-pressure steam-steam heaters are arranged between air cylinders of 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 a boiler power generation system 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 industr...

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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