Patent ID: 9550674
Date: 2017-01-24
CPC Classifications: B01D,B01J,C01B

Claim:
1. A plant for manufacturing hydrogen sulfide gas, the plant comprising at least: a reaction facility configured to generate hydrogen sulfide gas from sulfur and hydrogen gas; a cooling facility configured to cool generated hydrogen sulfide gas; a sulfur removal facility configured to remove sulfur contained in the hydrogen sulfide gas; and a gas treatment facility configured to render the hydrogen sulfide gas harmless, wherein the plant has exhaust facilities which are provided in the reaction facility, the cooling facility, and the sulfur removal facility, respectively, and configured to exhaust hydrogen sulfide gas leaking from the facilities, and wherein each of the exhaust facilities comprises: an exhaust pipe whose one end branches out into a first exhaust pipe configured to exhaust leaking hydrogen sulfide gas to the air and a second exhaust pipe configured to exhaust leaking hydrogen sulfide gas to the gas treatment facility; a concentration measuring apparatus provided between the corresponding facility and a branch point in the exhaust pipe and configured to measure a concentration of the hydrogen sulfide gas; and a valve mechanism configured to perform control in such a manner that, when the concentration measuring apparatus detects a concentration less than a predetermined concentration, the hydrogen sulfide gas is exhausted from the first exhaust pipe to the air, and when the concentration measuring apparatus detects a concentration not less than a predetermined concentration, the hydrogen sulfide gas is exhausted from the second exhaust pipe to the gas treatment facility.