Compact wastewater concentrator using waste heat

摘要

Abstract A compact and portable liquid concentrator (10) includes a gas inlet (20), a gas exit (22) and a flow corridor (24) connecting the gas inlet (20) and the gas exit (22). The flow corridor (24) includes a narrowed portion (26) that accelerates the gas through the flow corridor. A liquid inlet (30) injects liquid into the gas stream at a point prior to the narrowed portion (26) so that the gas-liquid mixture is thoroughly mixed within the flow corridor (24), causing a portion of the liquid to be evaporated. A demister (34) downstream of the narrowed portion (26) removes entrained liquid droplets from the gas stream and re-circulates the removed liquid to the liquid inlet (30) through a re-circulating circuit (42). Fresh liquid to be concentrated is also introduced into the re-circulating circuit (42) at a rate sufficient to offset the amount of liquid evaporated in the flow corridor (24). t