Abstract: Embodiments provide a combustion structure that can achieve stable combustion by addressing the aforementioned drawbacks in the prior art such as low flame stability, backfire, deflagration, blockage and/or any other drawbacks. The combustion chamber structure in accordance with the disclosure can include: a grate structure including a first set of elongated components, a fire retention structure including a second set of elongated components. The first set of first elongated components can be arranged along an axial direction within the combustion chamber structure. The second set of elongated components can be arranged along the axial direction in a same direction as the first elongated components. The second set of elongated components can be configured to generate a negative pressure zone within the combustion chamber. The first set of elongated components can form apertures that can be aligned with apertures formed by the second set of elongated components.

Abstract: An atmospheric water heating system is presented, where hot gasses from a burner are introduced directly to water. The water is exposed to the burner exhaust gasses as a film upon a series of rotating discs partially submerged in a reservoir. The water vaporizes and then re-condenses on subsequent discs, cooling the exhaust gas and heating the reservoir water. The heated reservoir water may be used to heat space heating water with a water-to-water heat exchanger. The water vapor may be used to heat environmental forced hot air with a vapor-to-air heat exchanger.

Abstract: A boiler including a water jacket surrounding upper and lower combustion chambers for receiving heat for heating water or other fluid therein, which chambers are defined by a refractory structure that extends entirely across the inner casing. A vertical passage through the refractory structure provides for flow of combustion gases from the upper to lower combustion chamber. Oxygen is provided through a first forced air inlet to the upper combustion chamber for burning of wood or biomass, and is provided through a forced air passage in the refractory structure and opening into the vertical passage thereby providing at least one second forced air inlet for burning of the combustion gases and particulates passing therethrough. The refractory structure sealingly engages the inner casing in a manner to seal the upper combustion chamber from the lower combustion chamber so that the upper combustion chamber can be made substantially air tight.

Abstract: The invention relates to a method for estimating the fuel supply of a boiler, for a building (2) having a boiler (4) and energy accumulation means (4?), in order to ensure a desired indoor temperature during an autonomy period P, this method including the following steps: a) making an estimation of the average outdoor temperature during the autonomy period P, b) determining the consumption of the building (2) in order to ensure said desired indoor temperature, depending on the previous estimation of the average outdoor temperature, c) determining the amount of energy to be provided depending on the previous consumption, and the amount of fuel required for providing this energy.

Abstract: A novel Biomass Combustion Unit apparatus purposefully designed to be uniquely fueled with Non-To-Minimally Fractionalized Biomass for the intentional production of heat for conversion to a multiplicity of useful energy forms. More particularly, said apparatus provides useful heat for: (i) Power Generation, (ii) Heating Applications, (iii) Cogeneration or Combined Heat and Power (CHP), (iv) Trigeneration or Combined Cooling, Heat, and Power (CCHP), (v) Mechanical Energy and (vi) Facilitating the production of Biofuels. Additionally, methods and systems are presented wherein the abovementioned forms of energy deploy organic and inorganic working fluids, in both Subcritical and Supercritical Power Generation Cycles, via Organic Rankine Cycle and a modified Rankine Cycles, respectively. Further, Woody Biomass Energy Crops and Biofuel components are presented as well.

Abstract: A boiler has a tank, a hearth contained in the tank, a gas pipe having one end in communication with a gas exit of the hearth and the other end passing through the hearth, a combustor in communication with a bottom of the hearth, and a fuel supply device being connected to a fuel inlet of the combustor.

Abstract: A wood burning hydronic heater comprises a primary firebox into which the wood is loaded and wherein initial combustion occurs. The heater also includes a secondary combustion chamber below the primary firebox into which the combustible gases from the primary firebox are forced and into which a fresh air stream is passed to burn the gases. A primary heat exchanger downstream of the secondary combustion chamber is adapted to reduce the temperature of the exhaust exiting from the secondary combustion chamber. A catalytic combustor, located in a chamber downstream of the secondary combustion chamber and primary heat exchanger, completes combustion and reduces emissions.

Abstract: Methods are disclosed for providing recovered lignin of suitable quantity and quality to provide sufficient heating value to power the generation of supercritical or near critical water without the need for outside sources of energy. Supercritical or near critical water generator devices and systems are also disclosed.

Abstract: The present invention relates to a firewood boiler, comprising: a boiler main body including a feeding hole through which wood fuel and air for combustion are fed, a smoke exhaust hole defined in the top thereof so as to be connected to an exhaust pipe, an air inlet defined adjacent to the smoke exhaust hole, and a heating-water store in which heating water is stored; a main opening/closing unit installed on the boiler main body to open and close the feeding hole and selectively supply and block the entry of outside air into the boiler main body when the feeding hole is closed; an auxiliary opening/closing unit for supplying outside air into the boiler main body when the entry of outside air is blocked by the main opening/closing unit; a temperature sensor for sensing the temperature of the heating water; and a control unit for controlling the inflow and blocking of air by means of the main opening/closing unit on the basis of information on the temperature sensed by the temperature sensor.

Abstract: A boiler for combustion of solid fuel, especially biomass, a first combustion stage with a primary air supply, an igniter, a fuel supply, a second combustion stage a burn-up and calcination space, a combustion chamber which is upwardly open and with a flue, the burn-up and calcination space being located underneath the combustion site such that fuel can be moved from the combustion site of the first combustion stage into the burn-up and calcination space. The primary air supply is located within the combustion chamber above the combustion site such that air can be blown into the first combustion stage, flue gases which form in the burn-up and calcination space are routed essentially passed the primary air supply means and the combustion site so that the flue gases of the second combustion stage do not adversely affect the combustion of the fuel at the combustion site.

Abstract: A pellet burner has inner and outer housings for defining a high pressure air plenum between. Angled perforations at strategic locations in the inner housing supplied pressurized primary and secondary combustion air so that, with pellets supplied to a burn pot of the inner housing and activation of a blower and an ignitor cartridge, the pellets auto-ignite and the air flow establishes a swirling flame in the burn pot that travels to a flame conduit of the inner housing where further swirling occurs in a venture section for shaping the flame into a clean, hot, symmetrical form.

Abstract: A heating system has a heating unit with a combustion chamber for burning wood pellets or other pelletized fuel. The heating unit is controlled by a process control module that automatically keeps all operating functions within predetermined limits for safe, efficient and easy operation. The unit also includes a combustion air distribution assembly with a stir shaft that rotates within the combustion chamber and introduces combustion air through orifices along the length of the shaft to enhance fuel combustion. A thermo cycle plumbing assembly serves as a safety feature by preventing overheating in the event of a power failure or pump failure. Also included in the unit is a removable insulated firebox burn chamber that provides a high temperature combustion atmosphere and a heat/particulate recovery module which provides maximum heating efficiency and reduces emissions, meeting EPA requirements and contributing to a cleaner environment.

Abstract: A fluid heat exchange system with a fluid flow circuit having a heat exchange fluid flow loop, a heat absorption component (as in a domestic hot water tank inclusive of small commercial use tanks as in tanks of 20 to 120 gallons), a heat exchanger and preferably also a pump. A controlled and automated fuel supply source based heater (as in a pellet stove) is in heat passage communication with the said heat exchanger. A control unit triggers activation of the pump upon fluid in the heat absorption component reaching or dropping below a preset temperature, and the fluid flow circuit is arranged such that, during times of non-activation of the pump, fluid is free to flow in a unidirectional flow within the fluid circuit based on thermodynamic temperature differentials alone. A retrofitting of a domestic hot water tank is also featured preferably making use of preexisting drain and safety vent porting for in-feed and out-feed porting in the exchange loop side.

Abstract: A hot water heating system is provided for heating water that is utilized to heat a structure such as a tobacco barn. The hot water heating system includes a base and a vessel, movably mounted on the base, for holding water supported on the base. The vessel is movable back and forth on the base between a heating position and a loading position. In the heating position, the vessel overlies a fire chamber. When the vessel moves to the loading position, the fire chamber is open at the top so as to permit solid fuel, such as wood, to be loaded through the open top of the fire chamber.

Abstract: Heat exchanger for thermo boiler 1 with a tube bundle 6 using solid fuel in particles constituted from an inner furnace 7 and a double wall jacket connected from the tube bundle 6 characterized by the fact that space 14 over the inner furnace 7 and the tube bundle 6 is divided from a slab 13, that tubes 6 which cross said slab 13 in openings 15 are rigidly fixed to said slab 13, that at least a bar 10, 11 which can be controlled from outside crosses the slab 13 and the double wall jacket 20 on at least one side, that said bar/s 10, 11 bring/s at least two scraping plates 8 and 9, of which an at least intermediate one positioned on one side of said slab 13 and at least an other one from the opposite part of slab 13, of which at least one positioned at the end of tubes 6.

Abstract: The present invention provides a solid fuel burner, which, while rendering the capacity larger than that in the conventional art, can suppress an increase in an unignited region and thus can realize the prevention of an increase in NOx concentration in a combustion gas and the prevention of a lowering in combustion efficiency, and a combustion equipment and boiler including the burner. The burner includes a fuel-containing fluid supply nozzle (12) which supplies a fuel-containing fluid, from a connecting part in a fluid transfer flow passage (10) for transferring a fuel-containing fluid including a fuel and a medium for transfer of the fuel, toward an outlet part provided on the wall of a furnace (4).

Abstract: The present invention relates to a solid fuel boiler, comprising a fire place with a burner, a flue gas passage with a flue gas outlet, an inlet for cold air, a convection space for heat exchange of cold air with the flue gas passage, and an outlet for hot air, wherein the flue gas passage comprises a tube kit with a plurality of tubes arranged adjacent to each other to create a flow space for air between the tubes, wherein at least one of said tubes is arranged so that it extends obliquely upwards in an acute angle in relation to the vertical line of the boiler from a lower attachment point to an upper attachment point.

Abstract: An embodiment of the invention consists of a process heater with a radiant section and an overhead convection section, the radiant section having a vertical cylindrical, contiguous, helical, tubular coil, having a bottom process fluid inlet and top process fluid outlet. The process fluid coil is contained in a refractory lined enclosure of square cross section and is exposed to an up flowing stream of combustion products, generated by burning coal on a continuous, traveling, chain grate stoker. The stoker is located at the base of the radiant section, receives a continuous deposit of coarse coal, with a minimum of fines, from a hopper located at one end of the stoker chain grate and discharges essentially coal free ash at the opposite end of the chain grate, thru a nozzle provided with a water seal.

Abstract: A boiler comprising a water jacket surrounding upper and lower combustion chambers for receiving heat for heating water or other fluid therein. The upper and lower combustion chambers are defined by a refractory structure which extends entirely across the inner casing. A vertical passage through the refractory structure provides for flow of combustion gases from the upper to lower combustion chamber. Oxygen is provided through a first forced air inlet to the upper combustion chamber for burning of wood or biomass in the upper combustion chamber. Oxygen is provided through a forced air passage in the refractory structure and opening into the vertical passage thereby providing at cast one second forced air inlet to the vertical passage for burning of the combustion gases and particulates passing therethrough from the upper combustion chamber.

Abstract: The invention relates to a gasification boiler for the combustion of solid fuels, in particular bales of straw, for heating purposes and for the production of hot water. The inventive boiler is characterised by optimal combustion and ash separation. The aim of the invention is to carry out the combustion of small particles in the most complete manner possible and to achieve an almost total separation of the ashes from the combustion gas upstream of the heat exchangers. To achieve this, according to the first feature of claim 1, the combustion and gasification chamber comprises lateral depressions that are configured next to the central grating and combustion chamber. Coarse particles collect in said depressions, leaving the fine particles to be carried with the combustion gas into the combustion chamber. According to the second feature of said claim, a cylindrical combustion chamber, configured as an additional component, is connected to the outlet of the combustion chamber.

Abstract: A heating system has a heating unit with a combustion chamber for burning wood pellets or other pelletized fuel. The heating unit is controlled by a process control module that automatically keeps all operating functions within predetermined limits for safe, efficient and easy operation. The unit also includes a combustion air distribution assembly with a stir shaft that rotates within the combustion chamber and introduces combustion air through orifices along the length of the shaft to enhance fuel combustion. A thermo cycle plumbing assembly serves as a safety feature by preventing overheating in the event of a power failure or pump failure. Also included in the unit is a removable insulated firebox burn chamber that provides a high temperature combustion atmosphere and a heat/particulate recovery module which provides maximum heating efficiency and reduces emissions, meeting EPA requirements and contributing to a cleaner environment.

Abstract: A wood-burning boiler is provided, comprising a combustion chamber having a first air intake, and being adapted for holding combustible wood. An exhaust chamber is fluidly coupled to the combustion chamber, and is adapted to receive burnt gases from the combustion chamber. A preheat chamber is included, having a second air intake, and the preheat chamber is fluidly coupled to the combustion chamber and is conductively proximate to the exhaust chamber such that the burnt gases in the exhaust chamber heat the air within the preheat chamber prior to the air in the preheat chamber entering the combustion chamber. The boiler also includes a water jacket conductively proximate the combustion chamber.

Abstract: A swimming pool heater that heats a private swimming pool and can be used to provide heating for a house, a cottage or a commercial swimming pool. Wood, that is often found around pools, is used as primary fuel. This oven has a cylindrical external appearance and is disposed horizontally. It is made of an interior wall and an exterior wall in between which water circulates. The interior wall plays the role of fire chamber and heat exchanger; the section having the shape of an annular zig-zag offers more surface for heat exchange than a simple cylinder thus increasing the overall heater efficiency. The left-over ashes insulate the bottom of the heating chamber replacing often used tiles. For general use, logs and branches are used as fuel, and an increase of 20 to 30 degrees F. of the water of a typical garden pool is attained overnight.