The IM 400 is a wall-mounted flue-gas dryer,and is designed to prepare flue-gases for a widevariety of gas monitoring applications. The IM 400 is a 'stand-alone' system that works automatically. The rugged wall mounted enclosure meets NEMA type 4 (IP65) classification.The first step of the flue-gas conditioningprocess is filtering the gas sample. The filteredflue-gas enters the system through a heated hose. The heated hose keeps the sample hot until it reaches the IM 400. The system then removes the water vapor with a permeation dryer or a peltier-cooler from the hot sample.The IM 400 is designed to prepare flue-gasesfor the IM 5000 flue-gas analyzing sytem.
The peltier cooler is designed to reduce the dew-point of the flue-gas to about 5°C, this eliminates condensation. The hot flue-gas enters the heat exchanger and the flue-gas comes in contact with the cold wall of the heat exchanger. The immediate separation of the water vapor is the result. Again virtually all elements of the flue-gas sample are retained, except the water vapor. The condensed water exits through a tubing pump. The filtered and dried flue-gas can now be analyzed by the IM 5000 or any other flue-gas analyzer.
The filtered gas is led directly to the IM 500 P through a heated hose without being cooled. The selective and continuous removal of water vapor is performed by a special tubing that is highly selective in the removal of water. The exhaust gas flows through the tubing and on the outside of the tubing dry gas is flowing over it. Now the water vapor permeates and is drawn off by the dry gas while the other constituents remain. At the end of the operation dry and filtered gas is left.