Abstract: An apparatus and method for recovering thermal energy from boiler stack exhaust gases and using the thermal energy in biomaterial processing. The apparatus and method include means to improve the boiler's operation and reduce emission of certain regulated compounds.

Abstract: The present invention is a system and method for generating a mixture of steam and combustion gas in a direct contact rotating steam generator, using high solids content water, and without waste liquid discharge. The invention includes removing the solids with controllable water content in a stackable form. The system includes a longitudinally rotatable and controlled pressure enclosure being mounted at a slope and having a steam producing section, a water injection section and a discharge section. The enclosure can include a mixing and mobilizing rotating element to enhance the mixture and the heat transfer. The system can have an additional wet section to scrub contaminates and produce saturated steam. The system can be integrated with an enhanced oil recovery facility or with an open mine oil facility that generates non-segregate tailings to consume their discharge liquid waste and generate steam, heat and a stable solids waste.

Abstract: Heat can be recovered from hot gas produced in a thermal reactor (1), by injecting water into the gas at one or more injection zones (4) in such an amount and in such a way that the gas temperature due to water evaporation is reduced to below 400° C., preferably below 300° C., possibly below 150-200° C., and the gas dew point becomes at least 60° C., preferably at least 70° C., possibly 80 or 85° C. The gas can then be led through a condensing heat exchanger unit (8), where at least some of the gas contents of water vapour are condensed, and the condensing heat can be utilized for heating of a stream of fluid, mainly water. Hereby, a method for production of hot water is obtained, which is cheap and simple and has low maintenance costs, and which moreover has a high efficiency degree and good environmental qualities The method can be used for a broad spectrum of fuels and conversion technologies.

Abstract: Methods and apparatus for generating a vapor to be injected into a flue gas stream are described. The apparatus includes a fluid vaporization and injection assembly including an input for receiving a non-flue gas, e.g., clean, fluid heat transfer medium, e.g., air; a first sealed coil having an input and an output through which a fluid, such as ammonia, to be vaporized is passed; and a second sealed coil having an input and an output through which a heated second fluid, such as water or steam, is passed. The second sealed coil is arranged to transfer heat from the heated second fluid to the non-flue gas fluid heat transfer medium. The first sealed coil is arranged to absorb heat from the non-flue gas fluid heat transfer medium. An injection unit is coupled to an output of the first sealed coil for injecting the vaporized fluid into a flue gas stream.

Abstract: A vapor generator comprising an evaporator unit, which in turn includes an inner chamber for containing a first fluid in a liquid state, and further includes a preheated liquid inlet and a vapor outlet, the evaporator unit having a heating device therein which can be activated for vaporizing the first fluid contained in the inner chamber to generate vapor. The vapor generator further comprises a preheating tank defining an inner chamber and comprising a liquid inlet for injection of the first fluid in a liquid state in the inner chamber, and a liquid outlet. Moreover, the vapor generator comprises an opened liquid channel connecting the preheating tank liquid outlet to the evaporator unit liquid inlet, and establishing free and continuous fluid communication between the preheating tank inner chamber and the evaporator unit inner chamber.