Mechanical fire grate type garbage gasification incinerator and dual-boiler system thereof

Abstract

The invention discloses a mechanical fire grate type garbage gasification incinerator and a dual-boiler system thereof. The mechanical fire grate type garbage gasification incinerator is small in heat conversion efficiency loss and higher in heat recovery efficiency. The mechanical fire grate type garbage gasification incinerator comprises a gasification incinerator body, the boiler system and a circulating air supply system. The gasification incinerator body comprises a feeding bin, a gasifier and an ash combusting furnace. A stacking sealing segment is arranged between the feeding bin and the gasifier, a transitional slag falling segment is arranged between the gasifier and the ash combusting furnace, and exhaust gas outlets are formed in the upper end of the gasifier and the upper end of the ash combusting furnace. The boiler system comprises a boiler body a and a boiler body b. The boiler body a is provided with a cyclone combustion chamber, a boiler chamber a and a boiler chamber b. The boiler body b is provided with a boiler chamber d and a cyclone dust chamber. Water cooling walls are arranged in the cyclone combustion chamber and the cyclone dust chamber. A superheater is arranged in the boiler chamber a, and an evaporator is arranged in the boiler chamber b. A superheater and an evaporator are arranged in the boiler chamber d. Steam pockets are arranged at the top end of the boiler body a and the top end of the boiler body b, an exhaust gas inlet of the cyclone combustion chamber is connected with the exhaust gas outlet of the gasifier, and an exhaust gas inlet of the cyclone dust chamber is connected with the exhaust gas outlet of the ash combusting furnace.

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 double boiler 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 industrial applic...

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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