100 applications of activated carbon - PTA oxidation device to purify gas

PTA is the English abbreviation of purified terephthalic acid. It is one of the important bulk organic raw materials. Its main purpose is to produce polyester fiber (polyester), polyester bottle flakes and polyester film, which are mainly used in packaging materials, films and magnetic tapes. It is widely used in various aspects of the national economy such as chemical fibers, light industry, electronics, and construction, and is closely related to the high level of people's living standards.

Since the 1980s, the market demand for PTA has increased sharply, resulting in a rapid increase in PTA production capacity, which has also led to the development of PTA processing technology.

The waste gas generated in the PTA production process mainly includes organic waste gas containing PX, acetic acid, and acetate produced in the oxidation stage, as well as the tail gas discharged from separation, filtration, drying and silos. The emission of exhaust gas from the PTA device is very large, which causes serious pollution to the surrounding environment and endangers human health. It must be purified.

Activated carbon itself has a unique pore structure. It is a kind of microcrystalline carbon material mainly made of carbonaceous materials with black appearance, developed internal pore structure, large specific surface area and strong adsorption capacity. There are a large number of micropores invisible to the naked eye in the activated carbon material, and the surface area of 1g of activated carbon material can be as high as 800-1500 square meters after it is unfolded.
Due to the attractive force between the activated carbon molecules, the molecules of those harmful substances can be captured by the inner pores of the activated carbon and enter the pores of the activated carbon, so the harmful substances in the exhaust gas generated by the PTA oxidation reaction can pass through the activated carbon absorption tower. Purify.