Abstract: A ground supported single drum power boiler is described combining a refractory lined and insulated stepped floor; refractory lined and insulated combustion chamber; integrated fuel chutes configured to pre-dry wet solid fuel; internal chamber walls; configurable combustion air systems; a back pass with after-burner ports and cross flow superheaters; and a rear wall that acts as the downcomers feeding the other walls. A second embodiment is adaptable as a gasifier.

Abstract: The invention relates to a steam generator (D1, D2) having a first passage, which is formed by one or more pipes (R1, R2) and through which a medium can be conducted in liquid and/or vapour form, and having a second passage (F1, F2), through which a hot gas can be conducted along the outer side of each of the pipes (R1, R2) which form the first passage. Each of the pipes (R1, R2), which form the first passage, of the steam generator (D1, D2) is surrounded by a pressure-resistant casing (M1, M2) which has a heat-insulating coating (W1, W2) on the inner side thereof and through the interior space of which the second passage (F1, F2) runs.

Abstract: The heat exchanger is constructed with a single pressure vessel to contain the ducts for the hot gas flow and the heating surfaces for the secondary medium. The heat exchanger is provided with a central duct for the hot process gas and two parallel branch ducts through which sub-flows of the process gas pass. A throttle member is provided in at least one of the branch ducts in order to throttle the flow of hot gas therethrough. Additional hot gas can be bypassed from the duct section into the exhaust gas from the pressure vessel.