Drying flue gas and increasing firing-installation draught - involves cooling gas below dew point, reheating partially using heat in coolant

摘要

The procedure for drying flue gas and increasing the draught of firing installations involves cooling the gas leaving the installation below its dew point in a first heat exchanger and extracting the moisture and impurities. In a second heat exchanger it is then reheated sufficiently for its inherent buoyancy to generate a natural draught in the chimney. Water used as coolant in the first exchanger circulates wholly or partially through the second. It may additionally serve a further exchanger heating water for industrial use.