Experimental Assessment of Water Sprays Utilization for Controlling Hydrogen Sulfide Releases in Confined Space

This paper reported the utilization of water spray for controlling H₂S release in a confined space, which is especially important in industry. A typical spray tower was modified to simulate the confined space for people's enter able routine operation (e.g., pump room), in which the dilution capacity of water sprays can also be evaluated. This work consists of two parts: the first part focuses on the influences of different operating conditions on chemical dilution capacities of water sprays in mechanisms; the second one is comparison between two nozzle configurations for evaluating their feasibilities of practical application. Water sprays express eligible performance for H₂S release control even though their dilution capacity was weakened at high gaseous concentrations and rates of releases. The presence of Na₂CO₃ can significantly improve absorption effectiveness of H₂S in water and the optimal Na₂CO₃ additive was found to be 1.0 g ·L^-1 in this test. Compared with Na₂CO₃, adjusting water flow rate may be an effective strategy in enhancing dilution capacity of water sprays due to the fact that larger flow rate led to both less dilution time (TD) and dilution concentration (CD). Furthermore, multi nozzle configuration is more efficient than single-nozzle configuration under the same water consumption.