Treatment device for waste gas generated in release film coating process

Abstract

The invention relates to a device for treating waste gas generated in a release film coating process, which comprises a coating room, a first drying box, a second drying box, a third drying box and a fourth drying box which are communicated in sequence, a preheater is provided with a first inlet, a first outlet, a second inlet and a second outlet, and the output end of a waste gas pipeline is connected with the first inlet of the preheater; a first outlet of the preheater is connected to an inlet of the thermal oxidation furnace through a pipeline, an outlet of the thermal oxidation furnace is connected to a second inlet of the preheater through a pipeline, a second outlet of the preheater is connected with a heat conduction oil heater through a pipeline, and the heat conduction oil heater is provided with a first heat exchange channel and a second heat exchange channel. A variable-frequency induced draft fan is connected behind the first heat exchange channel, and an exhaust funnel is connected behind the variable-frequency induced draft fan. The device disclosed by the invention reaches national standard and required emission indexes; the energy consumption of the device can be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of release film coating, in particular to a treatment device for waste gas generated in a release film coating process. Background technique [0002] The coating components of the release film are mainly silicone oil and solvent, and the solvent content accounts for about 50%-80%. During the production process, the silicone oil and solvent are mixed in proportion and evenly coated on the film substrate, and then dried by hot air, the solvent It becomes volatilized gas, and the silicone oil adheres to the substrate and becomes a product. [0003] Due to the large amount of solvent used, all the solvent will be volatilized during the coating and drying process, and a large amount of organic waste gas will be generated, causing pollution to the environment. At the same time, in the drying process, in order to accelerate the volatilization of the solvent, it is necessary to use natural gas or electric heating a...

AI Technical Summary

Problems solved by technology

It is difficult to meet such stringent standard requirements by using activated carbon adsorption process

The regenerative thermal oxidation process can meet the emission requirements, but the silicone oil in the coating will also volatilize in a small amount. As the use time increases, it will gradually adhere to the regenerator, and a chemical reaction will occur at high temperature to form a solid product to block the regenerator. Hot body channel, reduce the service life of heat storage body

At the same time, the volatilized solvent is only processed by RTO thermal oxidation, but the heat energy is directly discharged along with the hot flue gas, resulting in energy waste

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