HYDROGEN SULFIDE GAS PRODUCTION PLANT SYSTEM AND METHOD FOR RECOVERING AND USING HYDROGEN SULFIDE GAS

摘要

The present invention enables low-concentration hydrogen sulfide gas generated at the time of the regular inspection and starting up of a production plant to be efficiently recovered and effectively supplied to a treatment plant in which the hydrogen sulfide gas is used. This hydrogen sulfide gas production plant is provided with: a first supply pipe (14) through which hydrogen sulfide gas obtained from sulfur recovery equipment (13) is supplied to a treatment plant (X); and a second supply pipe (16) which branches off from a predetermined point (15) of the first supply pipe (14) and through which the hydrogen sulfide gas from the sulfur recovery equipment (13) is supplied to the treatment plant (X). In the first supply pipe (14), a concentration meter (22) for measuring a hydrogen sulfide gas concentration is provided on the upstream side from the branch point (15), and in the first supply pipe (14) and the second supply pipe (16), ON/OFF valves (23, 26) for performing ON/OFF control of supply to the treatment plant (X) via the respective supply pipes are provided on the downstream side from the branch point (15).