Abstract:
An outside air intake hood for receiving combustion air for delivery to a direct vent, fuel-fired heating appliance such as a water heater has an opposing pair of side inlets positionable to face parallel to an outside wall upon which the hood is mounted, an outer side wall extending between the inlets, and an outlet passage with an entry portion facing and spaced inwardly apart from the outer side wall. A generally V-shaped baffle member is positioned within the hollow body of the hood, with an apex portion of the baffle member facing the entry portion of the outlet passage. When the wind is horizontally blowing generally parallel to the outside wall, a side wall of the baffle member deflects the wind-driven outside air entering one of the hood side inlets into the outlet passage in a manner converting momentum of the entering air into pressure in a manner preventing the creation of an undesirable vacuum at the hood outlet. A bypass passage disposed within the hood outwardly of the outlet passage entry portion communicates the two side outlets and prevents undesirable wind-created overpressurization of the outlet passage. Such bypass passage representatively extends through a gap between the baffle and the entry portion of the outlet passage and may also extend through the baffle itself.
Abstract:
A solid fuel burner mountable on a boiler furnace. The forward portion of the burner is insertable through an opening in the casing of the furnace so as to extend into the furnace's combustion zone. The burner includes a tubular main body accommodating a feed screw for the solid fuel. The free end of the screw terminates in the forward portion of the burner. The other, closed end of the burner is mounted rotatably in a bearing. A drive rotates the feed screw inside the main body. An ignition chamber is disposed at the forward end portion. One open end of the ignition chamber meets up with the main body and the feed screw terminating within the chamber. An air supply duct with its delivery end in the chamber supplies combustion air to the fuel. An inlet in the main body gives access to the screw and thus permits the supply of fuel from a solid fuel container to the feed screw.
Abstract:
An air nozzle (3) mounted in the wall of a recovery boiler for supplying air from a supply duct (4) into the recovery boiler. The air nozzle (3) comprises a nozzle duct (7) attached to the wall of the recovery boiler and a separate nozzle part (3a) insertable into the nozzle duct in its longitudinal direction, air being supplied into the recovery boiler through a duct provided in the nozzle part (3a).
Abstract:
A solid fuel burning stove is provided and includes a housing within which a combustion chamber is located. The combustion chamber receives combustion air via an adjustable inlet formed through a channel member running along the base of the housing. The channel member defines a combustion air duct which communicates with a combustion air intake in the rear wall of the housing. Combustion air is drawn into the stove via the air intake and is forced through the combustion air duct by a fan. The combustion air passes through the adjustable inlet into the combustion chamber. A fire box is located within the combustion chamber above the adjustable inlet and holds the solid fuel to be combusted. Hot flue gases heat air flowing through a plurality of heat exchange tubes passing through the combustion chamber. The heated air flowing through the heat exchange tubes is directed into the room in which the stove is located via a plurality of vents in the front wall of the housing. The hot flue gases are then discharged from the stove via an exhaust in the rear of the stove. A hopper is also located within the housing and provides solid fuel to a delivery system which automatically replenishes the solid fuel in the fire box.
Abstract:
A gasification shaft in the reactor collects a loose heap of solid waste matter on a support at the bottom of the shaft in the form of a triangular hollow prism having longitudinal edges leaving gaps between it and the walls of the shaft. The support can be swung about its axis to open the gaps wider and shake the solid material. Oxygen containing gas is supplied at the top of the shaft and supports partial combustion of the solid material. Gas and partly burned solid material pass down through the variable gaps into a combination chamber below the shaft into which more oxygen containing gas is fed both from above through the prismatic support and from below through an ash chamber at the bottom of the combustion chamber after passing through lower gaps between an emptying device of triangular prism shape, below which is an ash removal chamber. The additional oxygen supplied from below into the combustion chamber assures the complete combustion of the solid material so that treatment of the ash outside of the reactor becomes unnecessary.
Abstract:
A primary air duct for a chemical recovery furnace is rectangular in cross section. Smelt accumulates on the walls of the air duct at the furnace end. A scraper structure is comprised of a pair of C-channels hinged together at one end. A mechanism moves the hinged scraper forward so it can be guided into scraping contact with the duct walls. The edges of the C-channels are guided by pin and groove engagement between the channels and the duct walls. The scraper is reciprocated from an inoperative position to a scraping mode by a rod to which force is applied.
Abstract:
The invention reads on a heating boiler for solid fuel, comprising a combustion volume with fuel feeding aperture, air entry apertures and chimney flue, and a water volume, the latter bordering on said combustion volume by mediation of convection plates. As taught by the invention, the boiler comprises air guiding elements for guiding the combustion air substantially across the combustion volume so that the point of air entry moves with time from one point in the combustion volume across the combustion volume for burning the fuel in the combustion volume zonally. The air guiding elements may consist of air entry apertures provided in the wall, disposed in a row across the combustion volume, and they may incorporate closing members for consecutively opening and closing the apertures e.g. with the aid of a governing apparatus from one margin to the opposite margin of the combustion volume. The air guiding elements may comprise an air inlet tube disposed to swivel or alternatively move in translation over the combustion volume.
Abstract:
A balancing air device for a heating unit in a building having a flue for the passage of waste combustion gases from a combustion chamber of the heating unit into a stack capable of having a draft flowing therein, comprising, a fresh outside air line connected to the combustion chamber of the heating unit for supplying air from outside the building and an air return line connected directly between the outside fresh air line and the stack for returning air supplied from outside the building to the stack when the heating unit is not operating. The cross-sectional flow areas of the outside fresh air line extending to the combustion chamber and the air return line are chosen so that, when the heating unit is not operating, the air return line satisfies a substantially constant draft flowing in the stack so that fresh outside air is not supplied to the combustion chamber when the heating unit is not operated.
Abstract:
The improved furnace of this invention may be used to produce heat by the burning of wood or other combustible matter. The furnace has a combustion chamber with a generally vertical axis and a chamber access door for loading combustible matter into the furnace. The access door in its normally closed position lies in a plane extending upwardly and outwardly from the axis of the chamber. A smoke limiting means which is positioned above the access door extends to the plane of closure of the door. This smoke limiting means limits the escape of smoke and other combustion products when the access door is open. The smoke limiting means may have a port for visually observing the interior of the chamber and for admitting a poker therein. An air injector extending through the door directs air to the burning material within the combustion chamber. The access door may have attached to it a grate extending into the chamber for holding the combustible material as it burns. The grate moves with the door making it easier to load fresh combustible matter onto the grate when the door is open and also shaking down previously burned material from the grate as the door is opened and closed. Finally, the furnace may be adapted with a latch means which automatically engages as the access door is opened but requires manual operation for release thereby preventing accidental closure of the door.
Abstract:
A fireplace stove that is quickly and easily installed in a conventional fireplace with little or no modification of the fireplace or chimney comprises a firebox that is shaped and dimensioned to be at least partly received in a fireplace but with clearance between it and at least some of the walls of the fireplace to facilitate heat transfer by convection. A flue leading from the top of the firebox extends a short distance up into the chimney flue. Oxygen to support combustion in the firebox is supplied by a duct that leads from the chimney flue into the firebox, the inlet opening to the duct being located some distance below the outlet from the stove flue. The space between the stove flue and duct and the chimney flue is closed off so that there is no communication between the fireplace, and thus the living space, and the chimney flue, thereby eliminating loss of heat from the living space by natural draft up the chimney flue and providing for delivery of heat by radiation, convection and conduction from the stove to the room efficiently.