RECOVERY METHOD FOR LIQUID CHEMICAL PRODUCT IN CHEMICAL PRODUCT MANUFACTURING APPARATUS

摘要

A method of efficiently and safely recovering a liquid chemical product remaining in the handling devices of a chemical product manufacturing apparatus without allowing the chemical product to leak to the outside of a system. In the method, the chemical product is drained from the bottom drain pipes (14), (15), (16), and (17) of the handling devices, directly collected, by its own weight, to a common tilted collecting pipe (13) installed lower than these bottom drain pipes and connected thereto, and carried, by its own weight, through the tilted collecting pipe (13) to a recovery tank (1) installed lower than the tilted collecting pipe and connected to the downstream side end part of the tilted collecting pipe.