Rubbish gasification combustion heat source furnace for reducing tetrachlorodibenzo-p-dioxin emission

Abstract

The invention relates to a rubbish gasification combustion heat source furnace for reducing tetrachlorodibenzo-p-dioxin emission. Through controlling uniform feeding of rubbish and uniform distributing of the rubbish in a hearth, the rubbish in bulk is prevented from entering the hearth, so that the rubbish, air and combustion-supporting gas are sufficiently combined helpfully, and the rubbish ispromoted to be combusted sufficiently; in addition, through the matching of the lower end of a horn-shaped inner shell and a rotary water seal tank, caked glass slags can be discharged and cleaned intime, and the rubbish of a furnace body can be ensured to normally metabolize and run; meanwhile, the temperature of the inner part of the hearth is measured according to different temperature measurement points, and the height of the rubbish materials in the hearth is monitored, so that through combining temperature measurement and height monitoring, a feeding device and discharging on the lowerpart can be better controlled; and the opportunity for supporting combustion can be controlled coordinatively, so that the rubbish in the hearth is sufficiently gasified and pyrolyzed multi-directionally, the generation of tetrachlorodibenzo-p-dioxin is avoided maximally, meanwhile, combustible gas produced by rubbish gasification and pyrolysis is sufficiently combusted, the combustion time is prolonged, and the generation of the tetrachlorodibenzo-p-dioxin is further avoided.

Description

technical field [0001] The invention relates to the technical field of garbage combustion energy recovery, in particular to a garbage gasification combustion heat source furnace for reducing dioxin emissions. Background technique [0002] At present, the mainstream methods of waste disposal include landfill, comprehensive utilization and incineration. Garbage landfill occupies land, pollutes the environment, and is not suitable for promotion. A consensus has been reached. In the absence of strict classification of garbage in my country, many experts do not approve of the comprehensive utilization of garbage, and there are not many successful cases. Therefore, mainstream views at home and abroad tend to for waste incineration. [0003] However, waste incineration will inevitably produce dioxins. Dioxin is known as the most poisonous in the world. The continuous incineration of garbage and the accumulation of dioxin cannot but pose a serious threat to human health. At present...

AI Technical Summary

Problems solved by technology

Garbage landfill occupies land, pollutes the environment, and is not suitable for promotion. A consensus has been reached. In the absence of strict classification of garbage in my country, many experts do not approve of the comprehensive utilization of garbage, and there are not many successful cases. Therefore, mainstream views at home and abroad tend to incineration

[0003] However, waste incineration will inevitably produce dioxins

Dioxin is known as the most poisonous in the world. The continuous incineration of garbage and the accumulation of dioxin cannot but pose a serious threat to human health. At present, there is no better way to deal with garbage, so it can only be landfilled. Accumulation, causing garbage to besiege the city, causing a garbage crisis, the garbage problem is a headache

[0004] For the generation mechanism of dioxins during waste incineration, it is mainly due to incomplete combustion in the incinerator, below 750-800 degrees, the combination of hydrocarbons and chlorides, and the adsorption of chlorobenzene and chlorophenol in the flue gas, etc. A specific temperature (250-400) is generated by the catalysis of metal chlorides. In the process, the temperature needs to be controlled above 800 degrees, while ensuring that the high temperature residence time of the flue gas is more than 2 seconds, and the flue gas is fully mixed and stirred. gas to make it fully and completely combustible, and provide enough combustion air to reduce the production of dioxins. The existing waste incineration equipment itself has poor control over material feeding, resulting in uneven feeding, non-dispersion, and piles of dioxins. The material is thrown into the furnace, and there is no relevant turning facility in the furnace, resulting in insufficient combustion. In addition, the calorific value of the garbage itself is uneven and not high. Sometimes it is impossible to achieve high temperature and sufficient combustion by generating heat by itself, and garbage appears. Combustion is not a real big fire combustion, but a slow and insufficient combustion, which will produce a large amount of unburned dust and dioxins. It can timely assist garbage to achieve high-temperature complete combustion and avoid the generation of dioxins. Basically, the existing garbage incineration equipment is difficult to achieve full combustion due to its unreasonable structural design. This problem is imminent and it is necessary to solve it

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