KR20090132687A - Backfire prevention apparatus for solid fuel combustor - Google Patents

Abstract

PURPOSE: A backfire prevention device for a solid fuel combustor is provided to prevent the backflow of flame by automatically closing a flow path of a fuel supply pipe in case flame flows back inside a fuel transfer cylinder. CONSTITUTION: A backfire prevention device for a solid fuel combustor comprises a fuel transfer cylinder(1), a fuel supply pipe(10), a fuel supply port(12), an upper inclined plate, an overheat sensor(4), an electric damper(20), and a blocking plate(22). A fuel transfer screw axis(2) inside the fuel transfer cylinder transfers solid fuel to a combustion head. The fuel supply pipe is cut and inclined on the upper part of the fuel transfer cylinder at 45° angle. The fuel supply port is formed on the center of the fuel supply pipe. The upper inclined plate is attached on the fuel supply pipe. The electric damper is installed on one side of the upper part of the fuel supply pipe.

Description

Backfire prevention apparatus for solid fuel combustor

The present invention is to block the flow path of the wood pellets, wood chips supplied from the fuel supply pipe when the operation of the combustion device is stopped or overheated in the fuel transfer cylinder in the solid fuel combustor using wood pellets, wood chips as fuel It relates to a flashback prevention device for a solid fuel combustor to prevent fire.

In the solid fuel combustor where wood pellets and wood chips, which are solid fuels, are supplied to the fuel transport screw inside the fuel transport cylinder and combusted in all the combustion heads, the operation of the combustion device is temporarily performed through the upper fuel supply pipe at the rear of the fuel transport cylinder. If the combustion condition is overheated in the fuel transfer cylinder, or if the combustion condition is overheated, the flame from the burner head flows back to the wood pellet which is transferred to the fuel transfer screw, and backfires to the wood pellet inside the fuel supply pipe at the rear side of the fuel transfer cylinder. There was a risk of fire.

In the solid fuel combustor, when the operation of the combustion device is stopped or when the overheated combustion occurs due to the back flow of flame inside the fuel transfer cylinder, the flow path of the upper fuel supply pipe at the rear of the fuel transfer cylinder that supplies the wood pellets to the fuel transfer cylinder is automatically closed. Therefore, a method of preventing the supply of wood pellets and blocking the backflow of the flame was needed.

In the present invention, the upper rear side of the rear upper fuel supply pipe of the fuel transfer cylinder is inclined at an angle of 45 ° to attach a phase inclined plate having a fuel supply hole in the center thereof, and an electric damper is installed on the upper side of the fuel supply pipe to transmit the electric shaft. The damper is mounted at a 45 ° angle by the damper so that the electric damper is automatically activated when the combustion device is stopped or when the overheating sensor is detected inside the fuel transfer cylinder. The blocking plate was raised at an angle of 45 ° to block the central fuel inlet of the fuel pipe.

The present invention attaches a fuel supply pipe cut at an upper rear side to an inclined surface at an angle of 45 ° on the rear side of the fuel transfer cylinder, and installs an electric damper on an upper side of the fuel supply pipe and is upwardly rotated by 45 ° by an electric damper on the electric shaft. By attaching an operation barrier plate to prevent the fire from flowing back by stopping the fuel supply by stopping the fuel supply passage by blocking the fuel supply passage of the fuel supply pipe by stopping the operation of the combustion device or by the operation of the electric damper in the event of overheating. There is a number.

The fuel transfer screw shaft 2 inside the fuel transfer cylinder 1 carries all the combustion heads of wood pellets and wood chips, which are solid fuels supplied from the fuel supply pipe 10 by rotation of the rear motor 3 and the reduction gear. In the solid fuel combustor to be burned by burning in the upper phase of the fuel feed cylinder 1, the upper rear side of the upper fuel supply pipe 10 is inclined at an angle of 45 ° to cut the upper inclined plate 11 having a fuel supply port 12 in the center On the upper side of the fuel supply pipe 10, an electric damper 20 actuated by the combustion device is stopped or the overheat sensor 4 is installed, and the electric shaft 21 is 45 ° by the electric damper 20. When the combustion device is operated by attaching the blocking plate 22 which operates upward at an angle, the blocking plate 22 attached to the electric shaft 21 of the electric damper 20 maintains its vertical position downward under its own load to supply the fuel supply pipe. Through the central fuel inlet (10) of (10) When it is supplied and is transported by the fuel feed screw shaft to be burned in the combustion head, when the operation of the combustion device of the solid fuel combustor is stopped or when the overheated combustion occurs in the fuel transfer cylinder, it is detected by the overheat sensor 4. The damper 20 automatically operates to block the plate 22 of the electric shaft 21 at an angle of 45 ° to shut off the fuel supply by blocking the central fuel supply port 12 of the fuel supply pipe 10 and the combustion head. It is possible to prevent the fire by preventing the flame from flowing back to the solid fuel supplied from the fuel supply pipe due to the flow of flame back to the fuel transfer screw.

In addition, the fuel level detection sensor 5 is installed on the lower side of the fuel supply pipe 10 so that the wood pellets supplied into the fuel supply pipe 10 are transferred to the lower fuel transfer screw shaft 2 and burned in the combustion head. When the wood pellets pile up inside the fuel supply pipe 10 due to the oversupply of fuel, the wood pellets are accumulated inside the fuel supply pipe 10 due to the excessive supply of wood pellets. In order to prevent the obstacles that prevent the blocking plate 22 of the operation).

1 is a perspective view showing a state of use of the present invention

Figure 2a, b is a cross-sectional view showing the opening and closing state of the blocking plate by the operation of the electric damper in the present invention

Explanation of symbols for important parts of the drawings

1: fuel transfer cylinder 2: fuel transfer screw shaft

3: motor 4: overheat sensor

5: fuel level sensor 10: fuel supply pipe

11: upper slope plate 12: central fuel supply port

20: electric damper 21: electric shaft

22: blocking plate

Claims (2)

The fuel transfer screw shaft 2 inside the fuel transfer cylinder 1 carries all the combustion heads of wood pellets and wood chips, which are solid fuels supplied from the fuel supply pipe 10 by rotation of the rear motor 3 and the reduction gear. In the solid fuel combustor to be burned by burning in the upper phase of the fuel feed cylinder 1, the upper rear side of the upper fuel supply pipe 10 is inclined at an angle of 45 ° to cut the upper inclined plate 11 having a fuel supply port 12 in the center On the upper side of the fuel supply pipe 10, an electric damper 20 actuated by the combustion device is stopped or the overheat sensor 4 is installed, and the electric shaft 21 is 45 ° by the electric damper 20. Flashback prevention device for solid fuel combustor by attaching blocking plate 22 which operates upward at an angle The flashback preventing device for solid fuel combustor according to claim 1, wherein a fuel level sensor (5) is provided on the lower side of the fuel supply pipe (10).

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