Vinyl chloride high-boiling residue rectification device and vinyl chloride high-boiling residue rectification separation method

Abstract

The invention relates to the technical field of chemical product rectification separation and provides a vinyl chloride high-boiling residue rectification device and a vinyl chloride high-boiling residue rectification separation method. The vinyl chloride high-boiling residue rectification device comprises a batch rectifying tower, a stock tank, a residue storage tank, a condenser, a reflux tank, a dichloroethylene storage tank, a dichloroethane storage tank, a trichloroethylene storage tank, a trichloroethane storage tank, a transition storage tank and a control main pipe, wherein a reboiler communicated with the interior of the batch rectifying tower is fixedly installed at the lower end of the batch rectifying tower; a heat source inlet pipe is fixedly installed at a heat source inlet of the reboiler; a heat source outlet pipe is fixedly installed at a heat source outlet of the reboiler; a feed pipeline is fixedly installed at an upper feeding hole of the stock tank. By adopting the device and the method, not only can the equipment cost and corresponding supporting facilities be saved, but also the heat loss can be simultaneously reduced, the heat energy utilization rate can be increased, pollution can be reduced and the vinyl chloride high-boiling residues can be furthest separated and converted, so that the vinyl chloride high-boiling residues can be fully recycled.

Description

technical field [0001] The invention relates to the technical field of rectification and separation of chemical products, and relates to a rectification device for high-boilers of vinyl chloride and a method for rectification and separation of high-boilers of vinyl chloride. Background technique [0002] Polyvinyl chloride (PVC) is one of the most widely used plastic varieties, and the current annual output in my country has reached one million tons. The rectification process of vinyl chloride is an important link in the production of PVC. The rectification process of vinyl chloride usually consists of a low boiling column system and a high boiling column system. The light component impurities are removed in the low boiling column, and the heavy component impurities are removed in the high boiling column. The mixture of vinyl chloride, vinyl chloride low boilers and vinyl chloride high boilers from the total condenser enters the low boiling tower after passing through the s...

AI Technical Summary

Problems solved by technology

Due to the scattered origin of vinyl chloride high boiling products, complex components, strong odor, and its volatility, inflammability, explosiveness and toxicity, it has not been recycled in most production plants, and some are directly discharged into sewage ditch as waste, and some will be discharged It is burned, and some use very complicated processes to separate the mixture, recover the dichloroethane, and discharge or burn other components. This not only causes environmental pollution, but also is a serious waste of resources.

Images