Color-coating line waste gas treatment and heat recovery method and system based on concentration rotating wheels and RTO (regenerative thermal oxidizer)

Abstract

The invention relates to a color-coating line waste gas treatment and heat recovery method and system based on concentration rotating wheels and RTO (regenerative thermal oxidizer). The method comprises the following steps: low-temperature low concentration volatile organic compound waste gas discharged from a base coating machine room and top coating machine room is sent into an adsorption zone of the concentration rotating wheels through a low-temperature waste gas collection pipeline, so that the volatile organic compound waste gas is adsorbed by the adsorbent in the adsorption zone; high-temperature high-concentration volatile organic compound waste gas discharged by a base coating curing oven and a top coating curing oven is sent into a heat storage incinerator through a high-temperature waste gas collection pipeline; hot air mixed gas desorbed from the high-temperature waste gas collection pipeline and the high-temperature desorption zone of the concentration rotating wheels is sent into a heat storage incinerator oxidizing chamber to be combusted; and the discharged high-temperature clean gas is sent into a heat recovery system. Due to the adoption of the heat recovery system, the reheating of the concentration rotating wheels only needs to consume the heat quantity of the heat recovery system without additional heating, thereby saving abundant energy and making contribution to energy saving and emission reduction for the country. The invention also relates to a color-coating line waste gas treatment and heat recovery system based on concentration rotating wheels and RTO.

Description

technical field [0001] The invention belongs to the field of color coating line production of steel plates in the metallurgical industry, in particular to the field of waste gas treatment of organic compounds (VOC) produced in the color coating line production. Background technique [0002] VOC is the English abbreviation of volatile organic compounds (volatile organic compounds). The US ASTM D3960-98 standard defines VOC as any organic compound that can participate in atmospheric photochemical reactions. They not only have a stimulating effect on various organs of the human body, but also have certain toxicity. The environment is extremely harmful. Among them, toluene and xylene are moderately toxic solvents in the classification of solvents, which have anesthesia and stimulation effects on the human body. Toxic to the nervous system in high concentrations. According to the latest research data, toluene and xylene will produce a certain photoelectric reaction after enteri...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN103007682A discloses a paint shop exhaust gas treatment method and system based on a concentration rotor and RTO. This method uses a VOC concentration rotor and a regenerative incinerator RTO to treat VOC gas. Atmospheric gas, but this method needs to consume a lot of energy, and it needs to consume a lot of energy to generate hot air to heat the regeneration zone during the regeneration process of the runner

At the same time, the heat energy generated by the regenerative incinerator RTO is discharged into the atmosphere without being utilized, resulting in the waste of these high-grade energy

Images