The utility model provides an emission reduction
system for producing
tetrahydrofuran from 1, 4-
butanediol, and relates to the technical field of
chemical production equipment. By arranging the 1, 4-
butanediol raffinate separation unit, the 1, 4-
butanediol raffinate generated in the
tetrahydrofuran production unit can directly enter the film
evaporator to be separated, the light component 1, 4-butanediol is rapidly evaporated and flows out from the first
gas phase outlet, and the light component 1, 4-butanediol is condensed by the
gas phase condenser and then returns to the
tetrahydrofuran production unit to serve as a
raw material to be recycled. And heavy components of
tar in the film
evaporator flow out from a first
liquid phase outlet at the bottom and are discharged and incinerated. The
system can further separate the 1, 4-butanediol
raffinate generated in the tetrahydrofuran
production unit, and recycle the 1, 4-butanediol in the raffinate, so that the material waste of the 1, 4-butanediol is reduced, and the
utilization rate of the 1, 4-butanediol
raw material is improved. And meanwhile, the 1, 4-butanediol residual liquid
discharge incineration treatment amount is greatly reduced,
energy conservation and emission reduction are achieved, and the production cost is reduced.