Abstract: A highly efficient boiler made up of a housing containing upper and lower manifolds. Identical tubes connect the manifolds on the right and left sides to form a plurality of superimposed passages which the combustion gases must successively traverse laterally front to back and upwardly back to front.

Abstract: A suppression chamber in a nuclear reactor containment includes a heat exchanger disposed in a gas space above water in the suppression chamber. A gravity-driven pool contains a supply of make-up water that is gravity fed to the heat exchanger through a conventional level-maintaining valve such as a float valve. A top header in the heat exchanger includes a free surface area for permitting separation of steam from water, thereby permitting venting of vapor only, while retaining the liquid coolant in the heat exchanger. A downcomer tube permits return of excess water to a lower location for further use in the heat exchanger. The heat exchanger is normally sealed, whereby internal surfaces in the heat exchanger require only a small amount of low-volatility corrosion inhibitors to prevent corrosion on internal surfaces thereof. Locating the heat exchanger in the gas space in the suppression chamber reduces the amount of corrosion on its external surfaces.

Abstract: A boiler is made up of a housing containing upper and lower manifolds. First and second sets of tubes connect the upper manifold with the lower manifold. One set of tubes joins the upper and lower manifold on the right and the other set joins the upper and lower manifold on the left. The first set rise from the lower manifold in crossing and recrossing pattern. The other set rise from the lower manifold and along the side wall of the housing to the upper manifold.

Abstract: A mobile coal-fired fluidized bed furnace system (10) is provided for generating steam to power a locomotive. Coal is combusted within the fluidized bed furnace chamber (30) in the fluidizing air to produce a hot flue gas which pass from the furnace chamber (30) through a boiler tank (90) and an economizer (34). The steam generated in the boiler bank and the walls of the furnace chamber is collected in steam drum (40) and passed therefrom through an in-bed superheater (100) and thence to the power generating means (22) to produce the power which drives the locomotive.

Abstract: Furnace performance is controlled during start-up or very low load operation at a time when the minimum air flow required to be supplied to the furnace is significantly greater than that required to burn the fuel being supplied to the furnace. Decreased furnace heat absorption is accomplished by supplying a larger quantity of the air immediately adjacent the fuel input location for the purpose of diluting the combustion gases and immediately decreasing their temperature level. Increased furnace heat absorption is obtained by introducing a greater portion of the air flow into the furnace at a location remote from the fuel being burned so that the gases at the fuel location remain at a high temperature, and transfer heat to the walls, before being diluted by the incoming air.

Abstract: A boiler including a combustion chamber having an open upper end and a boiler section having an inlet above the furnace and extending generally horizontally therefrom. The combustion chamber includes a blower, a nozzle or burner for gas or liquid fuels and a coal combustion system. Water tubes lining the combustion chamber are interconnected with water tubes in the boiler section.