JPS60218504A - Burner - Google Patents

Abstract

PURPOSE:To prevent clinker based on cinder from generating, by a method wherein a ventilation side duct extending outward of a combustion furnace is provided on an appropriate position of an air passage supplying secondary air to a combustion chamber, which is communicated with a chute side of a fuel feeding device juxtaposed outside of the combustion furnace for leading air. CONSTITUTION:Air from a blower 9 is sent to an air taking-in chamber 4 and an air passage 15 from a blast path 13. The air entered into the air taking-in chamber 4 flows out into a combustion chamber 11 through a vent hole 5 of a combustion shelf 6. On the one hand, a part of the air entered into the air passage 15 is entered into a ventilation side duct 16 communicated between the combustion chamber 11 and a chute 8 side constituting a fuel feeding device 2. The air is sent to a combustion shelf 6 surface along with processing fuel by passing through a screw conveyor 2B provided on a lower stage of the fuel feeding device 2. With this construction, as for the processing fuel burning on the combustion shelf 6 surface, complete combustion of the same is made to accelerate by supplying the sufficient air and incomplete combustion based on clinker can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a combustion furnace that can effectively burn all of the processed fuel produced by processing waste materials such as wood bark and wood ends.

The combustion method of conventional combustion furnaces is to sequentially add fuel to the fuel being combusted on the combustion shelf and combust it, and the ventilation holes of the combustion shelf are filled with the burnt remains of the fuel piled up below. In order to eliminate such inconveniences, the inventors of the present invention first continuously conveyed the processed fuel from the hopper via a fuel feeder @. The ash is supplied to the combustion shelf of the combustion furnace along the surface of the combustion shelf, and the burnt scum is pushed by the processed fuel supplied in the above-mentioned manner and falls sequentially to the ash trap.

The ventilation holes on the above combustion shelf are always unblocked by burnt debris and fresh air is supplied from the air intake chamber, and the ventilation holes for blowing secondary air are installed at the top on the fuel supply side of the furnace body. A perforated air passage is formed using a partition plate, and sufficient air is supplied from this to the flammable gas produced by dry distillation in the combustion chamber, so that it can be completely combusted.

Furthermore, when the operation of the combustion furnace is stopped, there is a danger that the residual flame on the combustion shelf will ignite the processed fuel remaining in the fuel delivery device, which may spread to the fuel in the furnace and cause a fire. In order to prevent this, a combustion furnace was filed as Japanese Patent Application No. 123856 of 1982, in which a fuel feeding device installed at the bottom of a hopper was arranged with screw conveyors f arranged in different stages above and below.

However, as a result of carrying out the above invention, the flame retardant substances contained in the processed fuel solidify as non-combustible substances on the combustion shelf surface during combustion, forming clinker, which blocks the ventilation holes drilled in the combustion shelf, and Since the clinker is not removed by the pushing force of processed fuel fed into the combustion shelf surface by the combustion feed device, processed fuel accumulates near the combustion shelf entrance.

It was discovered that the amount of air supplied from the ventilation holes on the combustion shelf also decreased, resulting in insufficient combustion of processed fuel in the combustion furnace.

The inventors of the present invention focused on the fact that the formation of clinker can be prevented by supplying sufficient air to the burning fuel, and improved the above-described invention to prevent the formation of clinker due to burnt residue. In order to prevent this and promote combustion, a ventilation side pipe extending outside the combustion furnace is added to the air passage that supplies secondary air to the combustion chamber, and this is connected to the fuel supply pipe installed outside the combustion furnace. It is configured to communicate with the shooter side of the storage device and guide the air passing therethrough to the shooter side, so that sufficient air can be supplied to the combustion shelf of the combustion furnace.

The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

A fuel feed system is provided in the motor 10' for forcibly driving the screw conveyors 2A and 2Bk of each stage, which are arranged in two different stages, upper and lower, via the screw conveyor chute 8 to the processing fuel supply port of the hopper 1. A fuel supply section in which the device 2 is arranged, an air intake chamber 4 in which ventilation holes 5 are bored in the ceiling plate and most of the ceiling plate is used as a combustion shelf 6, and a burnt ash ash trap 7.4--the above-mentioned in the lower part. The upper part of the combustion shelf 6, which is the ceiling plate of the air intake chamber 4, is used as the combustion chamber 11, and an air passage 15 is formed that communicates with the outer wall 17Vc on the side where the combustion chamber 11 is arranged, and the air passage 13 provided in the blower 9. and a nozzle hole 14 at the upper part of the outer wall 17 for blowing air into the combustion chamber.
There is an air vent hole 14 at the bottom that blows air into the air intake chamber.
The combustion shelf 60 is provided with a combustion furnace 3 formed at A', and the outlet of the lower screw conveyor 2B constituting the fuel feeding device 2 arranged in the fuel supply section is passed through the air passage 13 and the lower part of the outer wall 17. A ventilation flow side pipe 16 is disposed so as to be visible from above, and communicates from the air passage 15 to a chute 8 disposed in the fuel supply device 2.

Note that 12 in the figure is an exhaust pipe.

Since the present invention is configured as described above, when the combustion apparatus according to the present invention is operated, the motor 10 rotates and the processing fuel input into the hopper 1 is first transferred to the screw conveyor 2 disposed at the upper stage of the fuel delivery device 2. Nuclear chute 8 is scraped out by a person and sent to chute 8 installed at the tip.
The fuel falls and is fed through the screw conveyor 2BK arranged in the lower stage toward the combustion shelf 6 of the combustion furnace 3, where it is ignited.

A blower 9 blows air into the air intake chamber 4 located inside the combustion furnace 3 through an air passage 13 and an air passage 15 through a vent hole provided at the bottom of the outer wall 17. Ventilation is conducted into the combustion chamber 11 from the combustion shelf □6 formed by drilling, and the processed fuel is combusted.

Additionally, air from the blower flows into the air passage 15 provided on the outer wall of the combustion chamber 11 as secondary air, and the air passage 1
The air flowing into the combustion chamber 5 is injected into the combustion chamber 11 from the nozzle holes 14 formed in the outer wall 17, and is generated in the working part of the combustion chamber 11 to burn the combustible gas. Exhaust gas inside the combustion chamber is exhaust stack 1
2 pieces are ejected.

As mentioned above, the two-stage structure of the fuel delivery device 211 is designed to prevent processing fuel remaining in the fuel delivery device from igniting from the remaining flames on the 6th surface of the combustion shelf when the operation is stopped. - This is to prevent the fire from spreading to the processed fuel inside and causing a fire.

If the vent hole 5 is blocked by the burnt residue of processed fuel burned on the surface of the fuel plate 6, it becomes difficult for air to be supplied from the air intake chamber 4 to the combustion chamber.

Since the invention is configured as described above, the fuel is sent sequentially over the combustion shelf 6 from the screw conveyor 2B disposed at the lower stage of the fuel feeding device 2 to the horizontal conveyor p, so that the burnt scum is Since the ash is moved in the direction of the ash dropping section 7 and pushed out by the processed fuel sent successively by the new fcVC, the above-mentioned inconvenience can be avoided for the time being.

However, in spite of this, the combustible substances contained in the processed fuel solidify as non-combustible substances on the combustion shelf 6 surface during combustion, causing a clinker phenomenon.
It is not possible to completely prevent clinker from being removed, and the resulting clinker blocks the ventilation hole 5 of the combustion shelf 6, which impedes the complete combustion of the newly fed processed fuel.

The focus of the present invention is also to prevent clinker generation due to incomplete combustion of the processed fuel.

This point will be explained in detail next. By operating this device, air from the blower 9 is sent to the air intake chamber 4 and air passage 15 through 13 air passages, and the air that has entered the air intake chamber is passed through the ventilation hole 5 of the combustion shelf 6 to the combustion chamber. 11, but the air sent to the air passage 15 enters the combustion chamber 11 from the nozzle hole 14 bored in the upper part of the outer wall, and the air ejected from the nozzle hole is the carbonized combustible gas generated in the combustion chamber. A part of the air that has entered the air passage mentioned above also passes through the ventilation flow side pipe 16 between the air passage 15 and the chute 8 side that constitutes the fuel delivery device 2. The air enters the connected ventilation flow side passage pipe, and this air is sent to the combustion shelf 6 along with processed fuel through a screw conveyor 2B arranged at the lower stage of the fuel delivery device 2.

As a result, sufficient air is supplied to the processed fuel burning on the combustion shelf 6, which promotes complete combustion.9 It is possible to prevent the incomplete combustion noise caused by the clinker mentioned above, and also to prevent the incomplete combustion noise caused by the clinker mentioned above. Since the air is always flowing into the combustion chamber 11 from the side wall of the combustion device, it is also possible to prevent smoke from flowing back into the hopper 1 from the combustion chamber 11. In the example described in this description, a square-shaped combustion furnace and the like are illustrated, but a cylindrical combustion furnace or an air passage can be arbitrarily selected.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional diagram of the present invention. FIG. 2 is a sectional view taken along line A--A in FIG. 1. 1...Hotsunoq- 2...Fuel feeder 2 people...Upper screw conveyor 2B...Lower screw conveyor 3...Combustion furnace 11...Combustion chamber 4...Air intake chamber 12. ...Smoke stack 6...Combustion shelf 13...Blower duct 7...Ashes trap 14...Nozzle hole 8...Chute 15...Air passage 9...Blower 16...Vent Airflow side pipe 10... Drive motor 1
7...Outer wall applicant Masakazu Shimura, agent of Marune Co., Ltd.

Claims (1)

[Scope of Claims] The processing fuel supply port of the hopper is provided with screw conveyors arranged in two different stages, upper and lower stages, through chutes, and a motor for forcibly driving each stage of screw conveyor. A fuel supply section in which the equipment (transmission) is arranged, an air intake chamber in which ventilation holes are bored in the ceiling plate and most of the ceiling plate is used as a combustion shelf, and a ceiling of the air intake chamber with a combustion ash trap at the bottom. The upper part of the combustion shelf, which is a plate, is used as a combustion chamber, and an air passage communicating with the air passage provided in the blower is formed on the outer wall on the side where the air intake chamber is arranged, and a 5. A lower screw that constitutes a fuel feeding device arranged in the fuel supply section, which is equipped with a combustion furnace with a machined nozzle hole for blowing air and a through hole formed in the lower part for blowing air into the air intake chamber. The outlet of the conveyor is arranged so as to pass through the air passage and the lower part of the outer wall and look into the surface of the combustion shelf, and from the air passage there is a ventilation flow side that communicates with a chute arranged in the fuel delivery device. A combustion device characterized by arranging pipes.