HORIZONTAL TYPE PIG STATION, ITS OPERATION METHOD, AND SWITCHING/SUPPLYING SYSTEM AND METHOD FOR A PLURALITY OF FLUIDS USING THE PIG STATION

摘要

PROBLEM TO BE SOLVED: To provide a horizontal type pig station alternately using a plurality of pigs which can clean the inside of the pig station and the pigs during supply and circulation of fluids, make replacement life of the pig longer and enhance efficiency of a system, and reduce amount of contamination, an automatic switching/supplying system of a plurality of fluids using the pig station, and an automatic switching/supplying method of a plurality of fluids by the system.;SOLUTION: A horizontal type pig station 1 which alternately uses a plurality of pigs is provided with a chamber 6, a pig launching site 5 and a pig stoppage site 4 on the inlet side and outlet side in the traveling direction of pigs 9a and 9b in the chamber 6. The station 1 is provided with stop valves 7 and 8 adjacent to each of the sites 5 and 4. Furthermore, the station 1 is provided with a pig holder 10 which is connected to the sites 5 and 4 in the chamber 6, and the chamber 6 is provided with a cleaning liquid supply pipe 2 and a waste liquid discharge pipe 3.;COPYRIGHT: (C)2002,JPO