The chemical production of coal tar inevitably contains moisture. The use of coal tar has a strict quality standard water content which is less than 1%.
Dehydration of coal tar via a decanter centrifuge can accelerate the separation of oil and water.
Tar contains water in the form of diluted ammonia. With water into the corrosive medium fixed ammonia salt and heated to 220 ~ 250 ℃, it will cause the equipment a pipeline corrosion. In addition, the water in the coal tar is a kind of waste water containing many toxic and harmful substances such as ammonia, cyanide and phenol, especially when the water content is too high. The pollutant will make the production suffer and will definitely affect the environment. This is a burden that will add further costs.