A hazardous waste waste heat preheating economizer

Abstract

The invention belongs to a pre-incineration preheating device for solid granular hazardous waste (VOC components wrapped in particles) produced in the chemical process, and relates to a new type of hazardous waste waste heat preheating economizer, including multi-wave inner spiral finned tubes, lattice Topological composite layer coupling heating wall, porous multi-directional inclined sieve plate; multi-wave inner spiral fin tube and lattice topological composite layer coupling heating wall together constitute the shell of waste heat economizer, which is surrounded by the shell to form a device with a rectangular cross section and densely porous Multi-directional inclined sieve plate. The invention adopts flue gas waste heat as a heat source, and has a clear structure, which not only promotes the efficient utilization of flue gas waste heat, saves energy, but also reduces the weight of the structure, and effectively improves heat uniformity and eliminates local overheating by means of porous multi-directional inclined sieve plates inside the device effectively expand the contact surface, greatly prolong the residence time of hazardous waste in the device, significantly reduce the moisture content in hazardous waste, increase the initial temperature of incineration, stabilize the subsequent combustion temperature in the furnace, and greatly reduce secondary pollution of danger.

Description

technical field [0001] The invention relates to a novel hazardous waste waste heat preheating economizer. Background technique [0002] Granular solid hazardous waste is produced in the chemical process, which is usually treated by high-temperature harmless incineration. In the process of high-temperature treatment, the incineration temperature is often lower than the set temperature due to the hazardous waste has a certain moisture content and uneven temperature, and the overall combustion efficiency is low, so that a large amount of dioxin gas generated during the incineration process cannot be burned. Cause secondary pollution to the environment. Therefore, a preheating device will be installed before the hazardous waste enters the incinerator. The current preheating device does not fully utilize the waste heat energy, the heat exchange efficiency is low, the equipment is bulky, the insulation performance is weak, the heat loss is serious, there is local overheating or ...

AI Technical Summary

Problems solved by technology

The current preheating device does not fully utilize the waste heat energy, the heat exchange efficiency is low, the equipment is bulky, the insulation performance is weak, the heat loss is serious, there is local overheating or overburning, and because the granular solid hazardous waste is often accompanied by VOC substances, Therefore, vigorous mixing or stirring is not allowed, so that the hazardous waste cannot effectively reduce the moisture content during the preheating process, and the temperature uniformity cannot be guaranteed, which will have a negative impact on the subsequent incineration process.

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