Abstract: A purification system can provide for efficient heating of liquid via film heating, which, rather than heating a large volume of liquid, can heat a thin layer of liquid thus reducing the amount of energy required to evaporate the liquid. Film heating can enable evaporation of liquids using less energy than other methods. In addition, when liquids (e.g., seawater) having dissolved solids (e.g., salts) are heated, both the liquid and the solids must be heated. As evaporation occurs, the concentration of solids increases and more energy must be supplied to the liquid in order to cause evaporation. Because purification system can heat only a layer of liquid, less energy is required to heat the solids, which can allow for higher energy efficiencies in purifying liquids. These efficiencies can lead to decreased cost of potable water. Related apparatus, systems, techniques, and articles are also described.

Abstract: A semi-submersible gas burner assembly for a fire-on-water feature, the assembly including a tubular void former having nominal waterline disposed between proximal and distal ends and a separable lid engaging the distal end. The lid includes inner and outer peripheral skirts projecting toward and past the waterline, respectively. At least one gas manifold arm extends through and outward from the tubular void former, and includes a gas port disposed proximate the sidewall. The sidewall at the distal end includes a communicating aperture which fluidly interconnects the interior of the tubular void former with a flame retention chamber defined by the sidewall, the lid, the inner peripheral skirt of the lid, and the nominal waterline.

Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.

Abstract: Apparatus for evaporating waste water having chemicals therein which cause foaming comprises a holding tank having an inlet for receiving waste water, one or more submerged combustion chambers with burners suspended within the holding tank, and, one or more foam skimming weirs located in an upper portion of the holding tank, the one or more foam skimming weirs defining one or more foam collection zones.

Abstract: A portable catalytic heating system for off grid application, in which the heating system comprises a heating unit with a handle (4) and an, in extension hereof arranged, heating pipe (5) containing a catalytic burner (20) for catalytic combustion of gases for providing infra-red radiation, where the heating pipe (5) is produced in a material that is transparent for infra-red radiation and fluid-proof for immersion in liquids.

Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.

Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.

Abstract: A compact hydronic space and water heating apparatus and system is disclosed for use in a recreational vehicle. A liquid heating medium, stored within a low pressure tank, is recirculated through a gas fired heater thereby maintaining a desired set point temperature. The liquid heating medium is further circulated through the vehicles hydronic space heaters to heat the interior of the vehicle. Further fresh domestic water is passed through a heat transfer coil within the tank whereby hot domestic water may be provided. An auxiliary heating device is attached to the tank whereby hot combustion engine coolant may assist in maintaining the temperature of the liquid heating medium within the tank and/or reversed to pre heat the combustion engine if and when needed.

Abstract: A method and apparatus for heating a liquid storage tank includes a liquid storage tank having an interior and a peripheral sidewall. An engine compartment is appended to the peripheral sidewall in front of the heat tube. An engine is disposed in the engine compartment. Heat given off from the engine during operation heats the engine compartment and such heat is transferred through peripheral sidewall to the interior of the liquid storage tank. An exhaust conduit extends into the interior of the liquid storage tank. Heat from hot exhaust gases passing through the exhaust conduit heats the interior of the liquid storage tank.

Abstract: A burner apparatus includes a first tube having a first longitudinal bore and a second tube having a second longitudinal bore. The second tube is disposed within the first longitudinal bore such that an annular space is defined between the second tube and the first tube. The burner apparatus further includes a nozzle formed at a tip of the second tube. A plurality of side holes are formed in the nozzle. The side holes are slanted relative to a longitudinal axis of the nozzle and are in communication with the second longitudinal bore.

Abstract: The general concept of this invention is to utilize the high efficiency of heat transfer that is obtained by allowing the exhausting gas from the burner to come into intimate contact with the liquid to be heated. A housing adapted for partial immersion in the liquid of the tank and has an internal liquid heating chamber and defines inlet and outlet openings. A burner tube is supported within the housing and extends into the liquid and provides a combustion gas discharge opening. A burner assembly having a supply of combustible gas and air is in communication with the burner tube and has a burner nozzle being positioned to direct a flame into the burner tube. The burner tube has sufficient length for substantially complete combustion of a gas/air mixture within said burner tube and to discharge hot combustion gas into the liquid within said internal liquid heating chamber. The flame and hot combustion gas efficiently heat the liquid circulating through the chamber via the inlet and outlet openings.

Abstract: A wholly self-contained pond heater for use in preventing ice from forming on a pasture pond, comprising a heater assembly secured in a casing which is partially submersible in the pond. The heater assembly has a fire box from which intake and exhaust stacks extend upwardly. The stacks terminate in tips which face one another. The casing has louvers for the movement of air into and out of the casing, and an LPG fuel supply provided on the casing and connected to the heater assembly.

Abstract: Ice melting apparatus having an elongated vertically disposed body member with a melting head at the lower end which is heated by a flame to melt the ice. The heat is concentrated near or within the melting head and exhaust gases are expelled through an exhaust passage. The generated heat melts a hole in the ice conforming generally to the configuration of the melting head which in most cases is circular.

Abstract: A hot water boiler and/or hot steam generator as well as a gas burner and a water vessel for the hot water boiler and hot steam generator are disclosed. The water boiler or hot steam generator includes a water vessel which includes an elongated flue pipe which is preferably convoluted and which is fully submerged in the water to be heated during normal operations so that the generated heat is distributed along the flue pipe which is also the gas combustion chamber and can be efficiently dispersed into the water surrounding the flue pipe. This invention also describes a gas burner having an elongated body whose internal aperture increases along its length to create a venturi effect to improve combustion of the fuel gas mixture.

Abstract: Ice melting apparatus having an elongated vertically disposed body member with a melting head at the lower end which is heated by a flame to melt the ice. The heat is concentrated near or within the melting head and exhaust gases are expelled through an exhaust passage. The generated heat melts a hole in the ice conforming generally to the configuration of the melting head which in most cases is circular.

Abstract: A hot water boiler and/or hot steam generator as well as a gas burner and a water vessel for the hot water boiler and hot steam generator are disclosed. The water boiler or hot steam generator includes a water vessel which includes an elongated flue pipe which is preferably convoluted and which is fully submerged in the water to be heated during normal operations so that the generated heat is distributed along the flue pipe which is also the gas combustion chamber and can be efficiently dispersed into the water surrounding the flue pipe. This invention also describes a gas burner having an elongated body whose internal aperture increases along its length to create a venturi effect to improve combustion of the fuel gas mixture.