Abstract: A device, system and method are provided for treating water, in which a water treating agent is prepared and dispensed to an untreated drinking water source in discrete and consecutive control volumes enabling untreated water in the untreated water source to be treated thereby to provide potable water.

Abstract: A waste heat boiler which comprises a water chamber and a water vapor chamber, both surrounded by an opposed pair of tube plates, respectively, and a plurality of double tubes extending across the two chambers. The inner tubes within the double tubes are adapted to pass hot waste gases therethrough, while annular spaces defined between the inner and outer tubes within the double tubes are for directing water to be heated therethrough. At least one end area of the double tubes is of triplicate structure so that thermal stresses generated from thermal expansion of the tube elements may be absorbed effectively.

Abstract: A composite tube composed of an inner tube extending through and spaced from an outer tube by radial partition walls is coiled helically. The helical composite tube coil is housed in a tank having an interior silvered reflective surface and evacuated to minimize heat loss through the tank wall. A carburetor supplies a combustible gas mixture to one end of the inner tube, the gas mixture burns in such tube, and a centrifugal blower draws the combustion gas through the tube. A vaporizable liquid is supplied under pressure to the end of the outer tube adjacent to the centrifugal blower for passage of the vaporizable liquid through the outer tube in the direction opposite the flow of combustion gas through the inner tube for vaporization of the combustible liquid under pressure, such as for producing superheated steam from water.