JP3123836U - Rooster structure of wood burning and biomass pellet fired combustion chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rooster that suppresses the generation of clinker generated in a furnace when burning wood chips and biomass pellets.
SOLUTION: A rooster that constitutes the hearth of a furnace has a rising portion that forms a weir against the flow of combustion gas and fuel, and combustion air 5 that blows through a porous plate 1 from the lower portion of the rooster It hits the ceiling of the L-shaped plate 1 to make a strong flow parallel to the floor, and evenly distributes the fuel pellets supplied to the furnace on the rooster and burns the fuel pellets 4 that accumulate in front of the weir However, a rooster having a structure in which an L-shaped plate 1 is mounted on the air supply hole 3 in an inverted L-shape so as to carry pellets in the middle of combustion and the generated ash along the direction 6 of the combustion gas flow.
[Selection] Figure 1

Description

  The present invention relates to a structure of a rooster for burning fuel on a hearth so as not to generate clinker in a hot air / hot water / steam generator using wood chips and biomass pellets as fuel.

Conventionally, the combustion chamber of hot air / hot water / steam generators using wood chips and biomass pellets as the fuel is integrated with the combustion chamber, and a hole is formed in the flat castable hearth so that the combustion air is ejected in the swirling direction of the fuel. Or a fixed grate (see Patent Document 2) that has a flat hearth surface and is inclined so that combustion air is ejected obliquely upward in the fuel swirl direction.
Utility model registration No. 3099224 Japanese Patent Application No. 2005-337601

  In a conventional combustion chamber where the hearth is horizontal, the combustion is intense and the mass of the combustion is difficult to move near the fuel inlet and near the outlet of the air supply hole where the fuel pool happens to be stored on the downstream hearth. The so-called clinker that becomes excessively hot and is solidified by mixing ash and residual carbon in the fuel is likely to occur.

  When a clinker is generated, not only does it take time to clean the combustion chamber, but also the flammability becomes worse and soot and carbon monoxide are generated more. In addition, the thermal efficiency and durability of the device also deteriorate.

  As shown in FIG. 1, the rooster that forms the hearth of the combustion chamber has a rising portion that forms a weir against the flow of combustion gas and fuel, and the L-shaped plate 1 is perforated so as to cover the air supply hole 3. The structure attached to 2.

Combustion air 5 blowing up through the air supply hole 3 of the perforated plate 2 from the lower air chamber of the rooster collides with the ceiling of the L-shaped plate 1 forming the weir, and is ejected as a strong flow parallel to the floor and supplied to the furnace While the fuel pellets 4 are evenly dispersed on the rooster and the fuel pellets 4 accumulated in front of the weir are combusting, the pellets in the middle of combustion and the generated ash are carried along the direction 6 of the combustion gas flow.

  Having a large number of small weirs formed by the L-shaped plate 1 in the rooster causes the fuel pellets 4 to be dispersed and held in front of the weirs, making it difficult to form a large lump of fuel in the combustion chamber. If it burns with the air supplied from the air supply port 3 of the perforated plate 2 with a small lump in front of the weir, the lump of fuel does not become excessively high temperature and it is difficult to make a clinker. Thereby, not only the frequency of maintenance and inspection is lowered, but also the flammability is good, so that the thermal efficiency of the apparatus is easily maintained and the durability is also improved.

  Hereinafter, an example is given and the present invention is explained still in detail.

  FIG. 2 shows an example of a rooster in which an L-shaped long plate 1 is welded in an inverted L shape on the air supply hole 3 of the perforated plate 2 in the present invention. Combustion air that blows up from the combustion air chamber below the perforated plate 2 through the air supply hole 3, hits the ceiling surface of the L-shaped plate 1, and blows strongly in parallel with the floor is a weir formed by the downstream L-shaped plate 1 The fuel pellets collected before are uniformly dispersed on the rooster and burned, and the pellets that have become lighter during the combustion and the generated ash are conveyed downstream together with the combustion gas.

  FIG. 3 shows an example of a rooster according to the present invention in which corrugated plates 7 are arranged at appropriate intervals and fixed with support steel 8. The rising part of the corrugated plate becomes a weir, and the fuel pellets are dispersed and burned on the same principle as in FIG.

  FIG. 4 is a cross-sectional view of a pellet-fired hot water generator as an example of an apparatus to which the present invention is applied. The rooster of the present invention is used for the floor 14 of the furnace 9.

  FIG. 5 is a sectional view of FIG. 4 and is a downward view from AB, in which the floor surface is divided in the radial direction and the detachable structure of the present invention is placed. Since the furnace of the example apparatus is circular, the rooster in FIG. 5 is divided in the radial direction, but the dividing method and arrangement are not defined.

It is an operation | movement conceptual diagram of this invention rooster. It is a conceptual perspective view of the example which uses the perforated board in this invention rooster. It is a conceptual perspective view of the example which uses the corrugated board in this invention rooster. It is a conceptual diagram of the warm water generator which is an example which uses the rooster of this invention. It is a top view of an example of a warm water generator rooster part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reverse L-shaped plate 2 Perforated plate 3 Air supply hole 4 Fuel pellet 5 Combustion air 6 Combustion gas 7 Corrugated plate 8 Support steel 9 Furnace 10 Water pipe 11 Smoke pipe 12 Combustion air inlet 13 Air chamber 14 Rooster 15 Water inlet 16 Hot water inlet 17 Exhaust gas outlet 18 Fuel supply port 21 Furnace inspection port 20 Ash scraping port 21 Ignition burner port 22 Thermal insulation material

Claims (2)

It is a hot air / hot water / steam generator that uses wood chips and biomass pellets as fuel. In the rooster that constitutes the hearth of the furnace where the fuel is charged and burned, it forms a weir against the flow of combustion gas and fuel. Combustion air (5) that has a rising part and blows from the lower part of the rooster through the air supply hole (3) of the perforated plate (2) hits the ceiling of the L-shaped plate (1) that forms a weir, and is parallel to the floor As a strong flow, the fuel pellets supplied to the furnace are evenly distributed on the rooster, and the fuel pellets (4) that accumulate in front of the weir are burned, burning the pellets in the middle of combustion and the generated ash A rooster with a structure in which an L-shaped plate (1) is mounted in an inverted L shape on the air supply hole (3) so as to carry along the gas flow (6) direction. The rooster according to claim 1, having a detachable structure in the device.

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