LT5919B - Gas generator mouth - Google Patents

Abstract

The invention relates to heating systems, namely, solid fuel-burning equipment. A mouth consists of a firesnone brick (1), packed in a steel housing (2), surrounded with an outer metal casing (3), a level (7) for the fuel incensing it scroll, installed aslant between a screw conveyor (5) and hearth grill (6 ). An initial heating grate (8), gas generated smoldering fuel, assembly chamber (9) connected to mouth and a burner (10) with openings (11) through which warm air is fed from the cavity (4) formed between the firebox masonry (1) housing (2) and the outer shell (3) wall are fitted under a level (7). Angle of aslant level with horizontal plane is not less 25o

Description

The invention relates to a heating technique, namely to solid fuel combustion equipment.

Known boiler furnace (see LT patent No. 5652, publ. 2010), consisting of fuel and air supply and fuel burning equipment in the form of a tapered cone with open ends and air side openings for supplying combustion zone and distribute. There is a screw conveyor for fueling.

The known technical solution does not ensure sufficiently efficient combustion of fuel, which can result in the formation of slag.

The object of the invention is to ensure complete and efficient combustion of solid fuel, avoiding the formation of slag, and to increase the intensity of generation of generator gases at lower temperatures and their combustion efficiency.

To achieve the object of the present invention, the furnace is comprised of: a fireclay brick enclosed in a steel heat-resistant casing encased in an outer metal double-walled casing, the walls of which contain an insulating material, a gully for sliding fuel, slanted between a screw conveyor and a grating a preheating grate on which fuel is fired only for initial preheating of the bunker, a gas chamber formed by the combustion of fuel, and a burner with openings for the supply of heat from a cavity formed between the masonry body and the outer body walls, into which air is supplied from the environment through an air outlet at the bottom of the furnace. Furthermore, for the purpose of the invention, the angle of the sloping bed with the horizontal plane is at least 25 °. Also, for the purpose of the invention, the combustion burner of the generator gas is arranged in the furnace at the grate of the wound.

The invention is illustrated by a schematic diagram of a gas generating furnace (see figure).

The gas generating furnace consists of fireclay brick 1, housed in a steel heat-resistant body 2. The body 2 is enclosed in an outer metal double-walled body 3 with insulating material between the walls. The cavity 4 formed between the walls 2 of the firebox masonry 1 and the outer casing 3 is intended for the production of warm air. Inside the furnace masonry 1, a slope 7 is provided inclined between the fuel feed screw 5 and the grate 6 for sliding the feed fuel as it slides towards the grate 6. The angle 7 of the slope 7 must be at least 25 °. It is set depending on the fuel type. The length of the gully depends on the power of the firebox. The bearing 7 may be made of materials which do not necessarily have to withstand high temperatures. Underfloor 7 is provided with a preheating grate 8. Also, inside the furnace masonry 1 is a gas collection chamber 9. A burner 10 is connected to the furnace and has openings 11 for supplying warm air to it from the cavity 4. an air inlet 12 is provided, and an air outlet 13 for air inlet to the gutter grille. The air inlets 12, 13 are located at the bottom of the furnace. For efficient combustion of the generator gas, a burner 10 is provided adjacent to the grate 6.

The gas generator firebox operates as follows.

For example, solid fuel, such as shredded wood, is fed by a helical conveyor 5 on a sloping gully 7. On the preheat grate 8, the prime heating of the gully 7 is fired by opening the door and supplying air. As the solid fuel slides freely down the slider 7 towards the grate 6, it heats up from the initial heating grate 8 and burns (fuel pyrolysis).

The unburned fuel residue from the bunker 7 enters the grate 6 of the gutter and ends there completely without burning any slag. During combustion - when sanding on a bunker, even at low combustion temperature (about 400 ° C), an intense flammable generator gas is generated which collects in the gas collection chamber 9 and enters the burner 10 where it mixes with warm air fed from cavity 4 into the burner openings 11. The supply air draft is less than the burner 10 draft. The air from the environment introduced into the cavity 4 through the air inlet 12 heats up in the cavity. Combustible generator gas mixed with warm air ignites the flames of low temperature gas (up to 800 ° C) that is emitted to the grate 6 at the end of combustion. The resulting flammable gas mixture burns efficiently at high temperatures, leaving the burner at a temperature of at least 1200 ° C. In order to efficiently burn the fuel, to release the combustible low-temperature gas, air is supplied to the grate 6 through the opening 13.

The stated advantage of the gas generator furnace is that the design of the fuel-burning bed ensures intense combustion of the generator gas even at low (400 ° C) furnace temperature (about 400 ° C). The furnace cavity creates a space between the furnace masonry housing and the outer housing walls to allow the air entering the cavity to warm up. The supply of warm air to the burner results in intense mixing of the combustible generator gas with the air and its efficient combustion in the burner at high temperatures and without polluting the environment. Another advantage is that when the burner is installed near the grate, the flammable generator gas is ignited by the flames of low-temperature gas emitted by the burning of fuel residue on the grate. The temperature of the burner exiting the burner is at least 1200 ° C. In addition, due to the ongoing pyrolysis of fuel on the bed, unburnt fuel residues entering the lattice grate burn completely without forming any slag.

Claims (3)

DEFINITION OF INVENTION 1. A gas generating furnace consisting of a housing, a fuel burning zone, a fuel feed screw conveyor and air supply elements, characterized in that the furnace consists of: fireclay brick, enclosed in a steel heat-resistant casing, enclosed by an outer metal double-walled casing, insulated material for sliding down the fuel, inclined between the screw conveyor and the grate, underneath a pre-heated grate on which the fuel is fired only for the initial heating of the fuel, and the combustion chamber of the fuel formed by the fuel, with openings for the supply of warm air from a cavity formed between the walls of the furnace masonry housing and the outer casing, to which air is supplied from the environment through an air outlet provided in the lower part of the furnace. 2. The gas generator set according to claim 1, wherein the angle of the inclined bed is at least 25 ° with the horizontal plane. 3. The gas generator furnace according to claim 1, characterized in that the generator gas firing burner is mounted in the furnace grate.