Condensation plume mitigation system for exhaust stacks

摘要

An exhaust gas plume mitigation process and system includes either mixing secondary heat into a moisture rich exhaust gas stream, or diverting a moisture rich exhaust gas stream into a primary exhaust stack having hot exhaust gases flowing therethrough. Moisture rich exhaust gas from a liquid concentrator may be diverted into a high temperature exhaust stack of an engine, a generator, or a flare. The high temperature exhaust gases from the engine, the generator, or the flare raise the temperature of the moisture rich exhaust gas from the concentrator. The high temperature exhaust gases from the engine, the generator, or the flare are also lower in moisture content, so that the moisture rich exhaust gas from the concentrator is diluted by the drier high temperature exhaust gas. As a result, the mixed gas is less likely to develop a moisture plume upon exit to the atmosphere.

主权项

1. A plume mitigation system for a wastewater concentrator, the plume mitigation system comprising:
a primary transfer pipe at all times during operation fluidly connected to an exhaust stack, the primary transfer pipe diverting a portion, but not all, of exhaust gas flowing through the exhaust stack to the wastewater concentrator; and a return pipe fluidly connected to the concentrator and to the exhaust stack, the return pipe directing a moisture rich gas flow from the concentrator to the exhaust stack, wherein the primary transfer pipe is fluidly connected to the exhaust stack at a first location and the return pipe is fluidly connected to the exhaust stack at a second location, the second location being downstream of the first location in a direction of gas flow through the exhaust stack, and wherein moisture rich gas exiting the concentrator is mixed with exhaust gas in the exhaust stack, thereby effectively lowering a relative humidity of the moisture rich gas, which makes the combined exhaust gas and moisture rich gas less likely to form a condensation plume upon exiting the exhaust stack to the atmosphere.