PL177854B1 - Combustion chamber of solid fuel fired boilers - Google Patents

Abstract

Central heating boiler combustion chamber for solid fuel, especially fine coal in the form of constituting an integral part of the spatial boiler an element formed from the walls of the water jacket, separated from the bottom by a solid grate from the chamber ash pan with compressed air blowing, one of the walls has an adjustable charging door a slot and a cleaning door, characterized by that in a zone of at least one, preferably back wall (1), has an incandescent plate (14) with holes (15) located above the fuel charging level (16), the top and side edges of the plate (14) they are tightly connected with the walls of the water jacket (5), and the lower edge of the plate (14) is located at in the area of the grate (6) in close proximity to the wall a water jacket (5) so that it communicates with the chamber ash pan (7)

Description

The subject of the invention is the combustion chamber of a solid fuel central heating boiler, which is used in boilers for heating installations in small and medium-sized facilities.

There are known combustion chambers of central heating boilers, in which the forced air movement flows through the fuel layer from the ash chamber. Additionally, secondary air is supplied through a slot in the cover of the charging door.

The disadvantages of these chambers are incomplete fuel combustion, a large amount of unbound carbon monoxide, cooling and extinguishing the flame in the secondary air gap zone, smoke, fumes planting, low boiler thermal efficiency.

The object of the invention is to remedy the above drawbacks and inconveniences.

The combustion chamber of the solid fuel central heating boiler, according to the invention, is an integral part of the furnace in the form of a spatial element formed from the walls of the water jacket. It is separated from the bottom by a solid grate from the ash chamber with a compressed air blast. On one of the walls, the chamber has a charging door with an adjustable slot and a cleaning door.

The essence of the invention consists in the fact that in the zone of at least one wall of the water jacket, the chamber has an incandescent plate with openings located above the fuel charging level. The upper and side edges of the board are tightly connected with the water jacket wall, and the lower edge of the board is located in the area of the grate, a short distance from the water jacket wall, so that it has a connection with the ash pan chamber.

Thanks to the use of the chamber according to the invention, the following technical and operational effects were obtained:

- combustion of fine coal in a regulated manner,

- obtaining high purity of exhaust gases in terms of CO content of less than 0.2%, which is comparable to the purity of exhaust gases from gas-fired boilers,

- complete combustion of fuel,

- increasing the thermal efficiency of the boiler,

- reduction of fuel consumption.

The subject of the invention, in an exemplary embodiment, is shown in the drawing.

The combustion chamber of the boiler, which is an integral part of the boiler, is a spatial element formed by the rear wall 1, side 2, top 3 and front 4, which are the walls of the water jacket 5. At the bottom, the chamber is separated by a fixed grate 6 from the ash-pan chamber 7. Ash-pan chamber 7 with a door 8 has a compressed air installation 9. In the front wall 4

ΠΊ 854 the chamber has a charging door 10 with an additional cover 11 having an adjusting screw 12. Below it has a cleaning door 13 with a seal, not shown in the drawing.

In the area of the rear wall 4, the chamber has an incandescent plate 14 with openings 15 located above the fuel charging level 16. The upper and side edges of the incandescent plate 14 are tightly connected to the wall 4, and the lower edge of the plate 14 is located in the area of the grate 6 at a short distance from the wall. 4 of the water jacket 5, so that it communicates with the ash chamber 7. Below the upper wall 3, the chamber has fire tubes 17, under which the heating tubes 18 are located.

The fuel 16, in the form of fine coal, burns from the top. The air forced by the compressed air installation 9 into the ash chamber 7 passes partially through the grate 6 and through the fuel stack 16, causing gasification of the fuel 16 in the combustion zone. At the same time, it passes through the gap between the glow plate 14 and the rear wall 4, heating up. The heated air is blown through the holes 15 in the plate 14 into the area above the burning fuel 16, causing the resulting carbon monoxide to be chemically bound. A symptom of this is the blue color of the flame, characteristic of the burning gas. When the compressed air installation 9 is switched off by the controller, not shown in the figure, the oxygen required for the combustion of the emitted gas is supplied through a gap of the size determined by the cover 11 through the adjusting screw 12. The hot exhaust gases flow around the heating tubes 18 and pass through the fire tubes 17 to the next. parts of the heat exchanger through the flue to the chimney.

177 854

Publishing Department of the UP RP. Circulation of 70 copies

Price PLN 2.00.

Claims (1)

Patent claim Combustion chamber of a central heating boiler fired with solid fuel, especially fine coal in the form of an integral part of the boiler, a spatial element formed from the walls of a water jacket, separated from the bottom by a solid grate from the ash-pan chamber with compressed air blown, with a charging door in one of the walls with adjustable a slot and a cleaning door, characterized in that in the area of at least one, preferably rear wall (1), it has an incandescent plate (14) with holes (15) located above the fuel charging level (16), the top and side edges of the plate ( 14) are tightly connected to the walls of the water jacket (5), and the lower edge of the plate (14) is located in the area of the grate (6) at a short distance from the wall of the water jacket (5), so that it has a connection with the ash chamber (7).