The invention belongs to the technical field of
dehydration systems, particularly relates to a low-boiling
tower feed
dehydration system before VC rectification, and aims to solve the problems that in the prior art, when
vinyl chloride is dehydrated by adopting a
solid caustic soda particle layer, local excessive consumption and edge waste of
solid caustic soda are easily caused due to non-uniform distribution of
vinyl chloride, and the
solid caustic soda is easily caked to block a channel, so that the product quality is influenced. According to the technical scheme, the device comprises a low-boiling
tower feeding pump, an alkali liquor collecting tank, two
drying boxes and a low-boiling
tower, the right side of the low-boiling tower feeding pump is connected with a first connecting
pipe, and the bottom ends of the two
drying boxes are fixedly connected with fourth connecting pipes; the two fourth connecting pipes are fixedly connected with the first connecting
pipe, and Y-shaped connecting pipes are fixedly connected to the top end of the alkali liquor collecting tank and the bottom ends of the two
drying boxes. By optimizing
vinyl chloride distribution and vibrating a solid caustic soda particle layer, vinyl
chloride is made to make uniform contact with solid caustic soda, meanwhile, lumps are shaken to avoid blockage, and the drying efficiency is improved; the
dehydration efficiency is improved; and the solid caustic soda replacement frequency is reduced.