Mechanical grate type waste gasification incinerator and boiler system thereof

Abstract

The invention discloses a mechanical grate type waste gasification incinerator with less conversion thermal efficiency loss and higher thermal recovery efficiency and a boiler system of the waste gasification incinerator. The mechanical grate type waste gasification incinerator comprises a gasification incinerator, the boiler system and a circulating air supply system, wherein the gasification incinerator comprises a feeding bin, a gasifier and a burnout furnace, a stockpiling sealing section is arranged between the feeding bin and the gasifier, a transition slag blanking section is arranged between the gasifier and the burnout furnace, and flue gas outlets are formed in the upper ends of the gasifier and the burnout furnace respectively. 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 mutually communicated, a water cooling wall is arranged in the cyclone combustion chamber, a superheater is arranged in the furnace chamber a, an evaporator is arranged in the furnace chamber b, a steam drum is arranged at the top end of the boiler body, a steam-water inlet is formed in the steam drum, the steam drum is connected with water inlets of the water cooling wall and the evaporator and used for outputting water, steam outlets of the water cooling wall and the evaporator are connected with a steam inlet of the steam drum for backflow of steam, and a saturated steam outlet of the steam drum outputs superheated steam through the superheater.

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 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 application, ...

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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