Waste heat utilization device with hot air circulation system

Abstract

The invention discloses a waste heat utilization device with a hot air circulation system. The device comprises the hot air circulation system, an environment-friendly treatment system, a waste heat recycling system and an emission system. The hot air circulation system comprises a curing furnace and a curing furnace heat chamber, a to-be-cured workpiece after spraying is placed in the curing furnace, a first combustion machine is installed in the curing furnace heat chamber and used for heating waste gas generated by curing the workpiece and supplemented air, and the curing furnace and the curing furnace heat chamber are communicated with each other to form a circulation air flow passage. The environment-friendly treatment system comprises a high-temperature decomposition furnace communicated with the circulation air flow passage; the waste heat recycling system is communicated with the environment-friendly treatment system and the first combustion machine and is connected with the emission system. Toxic waste gas generated during curing of the workpiece in the curing furnace is oxidized and decomposed into standard waste gas in the high-temperature decomposition furnace, the waste gas is utilized by a waste heat utilization device in the process of discharging the waste gas to the outside, and besides, the waste heat generated by heating of the first combustion machine is also utilized by the waste heat utilization device, so that waste heat utilization and environment-friendly emission are achieved.

Description

technical field [0001] The invention relates to an environment-friendly and energy-saving equipment, in particular to a waste heat utilization device with a hot air circulation system which can fully incinerate waste gas produced in the spraying process and utilize the waste heat generated by the incineration. Background technique [0002] As the frontier cities in my country's economically developed regions, southern and coastal cities in China have a considerable number of industries, such as furniture, machinery and equipment, and automobile manufacturing. Paint is used to varying degrees in the production process, most of which are solvent-based paints. . Solvent-based paints are widely used in related industries due to their mature technology, relatively low cost, and good performance. [0003] But the paint contains a lot of organic solvents, and the organic solvents contain a lot of volatile organic compounds (VOC) with formaldehyde, benzene, toluene, xylene, TDI, etc...

AI Technical Summary

Problems solved by technology

Usually, the exhaust gas incinerator uses diesel oil, heavy oil or natural gas as fuel, and the exhaust gas sent to the incinerator burns in the flame of the above fuel to oxidize and decompose it. However, the higher the temperature of the incinerator furnace, the more fuel is consumed. In order to save fuel, some manufacturers adopt low-temperature combustion methods, that is, the incineration temperature is lower than 760°C (such as 700°C, or even below 600°C), so that organic solvents or other harmful components (such as phenol, formaldehyde, etc.) cannot be completely oxidized and decomposed. The above-mentioned harmful components can be detected on the exhaust chimney of the incinerator, which exceeds the national standard, and the smell of the above-mentioned organic substances can be smelled within hundreds of meters from the incinerator

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