JPS5878011A - Combustion device for wood chips - Google Patents

Abstract

PURPOSE:To cause production of a large amount of formation gas from wood chips and to improve a heat efficiency, by a method wherein a rooster titling downward is placed in front of an outlet of a conveyor for conveying wood chips, and it is surrounded with a cylindrical covering member. CONSTITUTION:In case wood chips are burned chips in a hopper 1 are conveyed over a stationary rooster 13, consisting of a heating part 15 tilting downward and a rooster part 16 connected to the lower part thereof, through a transportation tube 3 by means of a conveyor 2. Meanwhile, combustion air is fed from primary and secondary air feed ports 25 and 26 through the working of a blower 8 to fire the chips on the rooster part 16. Then, the chips are lowered as they are bent, and an ash layer formed on the outer surface of the chips is raked down resulting from the reciprocating movement of a moving rooster 14 to perform a complete combustion. Resulting from said combustion, a generated heat gathers at the inside of a cylindrical member 21, a large amount of formation gas is produced through thermal decomposition of the chips on the heating part 15 resulting from heating of them, the produced gas is burned, and it is exhausted as flames.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the combustion of compressed wood chips-ii CPC.

Traditionally, compressed wood chip combustion equipment only forces combustion air into the wood chips to promote combustion.
The amount of generated gas that becomes the flame was small, the same as in the case of natural combustion, and even when complete combustion was performed, the amount of heat generated in the flame part O was low, and the amount of heat generated in the solid combustion part was high.

However, a large amount of heat is supplied by the above-mentioned combustion equipment from the flame, and only a small amount of heat from the solid combustion part is supplied by radiation, so conventional combustion equipment has poor thermal efficiency and is uneconomical. .

The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to heat the supplied compressed wood chips to a high temperature using the heat of combustion and cause them to pyrolyze, thereby generating a large amount of generated gas and causing a flame. It is an object of the present invention to provide a combustion device that increases the amount of heat generated and has excellent thermal efficiency.

An example of implementing the present invention will be described with reference to the drawings.
is a combustion device, (a) is a blast pipe, and (a) is a furnace.

The blast pipe (-) is a cylindrical body whose both ends are closed with a cover plate (axXai), and one end of which is fixed to the side wall of the furnace via a seven-piece (2), and is arranged horizontally.

A hopper (1) for storing compressed wood chips, etc. is formed at the end of the air pipe (-), and a conveyor (2) is installed inside the hopper (1).
Place.

The hopper (1) is equipped with a cylindrical opening by opening the upper surface of the blower pipe, and a partition plate (1s
) is fixed, and the bottom is formed into a substantially V-shape.

The conveyor (2) is a screw conveyor and a hopper (
It consists of a transport pipe (3) horizontally connected to the lower opening of the partition plate (13) of 1) and a screw shaft (4) that slides into the inside of the limb canal (3).

The transport pipe (3) is curved so that the outlet side thereof is higher, and the outlet portion penetrates the cover plate (a2) and the 7 langes (b) and protrudes into the furnace (b). Turn on the cover member (5) to open and close it.

The screw shaft (4) is rotatably supported by the lid plate (al) and the curved portion of the transport pipe (3) via bearings, respectively, and the end on the lid plate (&1) side projects outward. , the sprocket (6) is fixed, and the other end penetrates the curved part of the transport pipe (3) and protrudes from the side wall of the furnace Cb),
An eccentric cam member CLI is fixed to the protruding end.

In addition, the transport pipe (3) is provided at the bottom of the nine board (7).
A blower (8), a drive motor (9), and a speed reducer (to) are provided on the cough substrate (7).

The drive motor (9) is linked to the belt speed reducer 011, and the output shaft of the reducer (7) is linked to the tin rocket (6) of the screw shaft (4) via a chain or the like. The rotation of the motor (9) is reduced by a speed reducer and transmitted to the sprocket (6), and the screw shaft (4) is rotated to transfer the fuel from the hopper (1).

The blower (8) is connected to a blower motor (8).
) is rotated to generate air, and its air outlet is connected to the side of the air pipe (a), and the air is blown into the air pipe (a).

The fixed loss dollar (end) is made of heat-resistant casting material or the like, and consists of a trapezoidal heating part (2) that widens toward the end and a rectangular loss point (end) with a width equal to the base of the trapezoidal heating part (2). The heating part (2) of the fixed loss dollar (11) is fixed below the outlet opening of the transport pipe (3), and is formed with a slope so that it becomes lower as it goes away from the outlet opening, and widens as it gets lower. It is designed to become

゛ The loss point (g) is formed to have a gentler slope than the heating part (a), and has a large number of air supply grooves (to).

The movable I-strut a4 is an elongated heat-resistant cast member with a rectangular cross section, and is provided so as to protrude along the lower edge of the fixed p-strut (2), and is slidably supported by the nine guide rails.

Projections i- are provided on the upper surface of the moving p-stole α◆ and the side surface on the fixed loss dollar (b) side, respectively, to scrape off the ash layer formed on the surface of the burning fuel.

Further, a recess is formed in the center of the lower surface of the movable rotor α◆ in the longitudinal direction, and is engaged with a cam piece fixed to one end of a drive shaft wheel rotatably disposed below the fixed rotor.

A base end of a swinging rod that engages with the eccentric shaft (B) of the eccentric cam member (B) is fixed to the other end of the drive shaft (4), and is rotated by the rotation of the screw shaft (4). The drive shaft wheel rotates within a predetermined angle range, and the movable loss handle a◆ reciprocates in the horizontal direction.

The fixed Rosdol (2) above, the moving Rosdol a◆, Fire Roga)
so as to surround the outlet of the transport pipe (3) protruding inwardly from the side wall of the screw shaft (4) and the eccentric cam member α of the screw shaft (4).
A cylindrical member (6) is fixed to the 7 flange (b) and protrudes horizontally.

The above-mentioned cylindrical member (2) and the seven twisters cA″h surround the fixed Rosdol (B), thereby trapping the heat of the compressed wood chips burning on the Rosdol part α◆, and the heating part (B) K. K to heat and pyrolyze the supplied compressed wood chips.
It has become.

Furthermore, secondary air vents (2) are drilled on the left and right sides near the exit of the transport pipe (3), and a primary air vent (2) is drilled below that to connect the vent pipe (-) and the cylinder, respectively. It communicates with the inside of the shaped member (2).

Each of the air outlet g4) is provided with a cover plate that can be opened and closed, and the amount of air blown can be adjusted by adjusting the degree of opening of the cover plate.

The primary air outlet Sakaki is opened at the lower side of the fixed loss door (B), and the combustion air of the air pipe (&) is passed from the bottom of the fixed loss door (to) through the air supply groove (2) of the loss dollar part a◆ for combustion. It is designed to supply air for use.

The secondary air outlet (2) is opened above the fixed rostrum, and blows the air from the air duct above the four strands to aid combustion and eject the flame horizontally.

Then, when the conveyor (2) is operated, the hopper (1)
The compressed wood chips inside move through the transport pipe (3), swing a member provided at the outlet part to open the outlet, and are discharged in front of the fixed Rosdol (2).
) descends along the heating section (2) and reaches the stall section (2). .

The blower (8) is moved at the same time as the conveyor (2) is moved, and -
The primary and secondary air supply ports g4fi4 are opened to ignite the compressed wood chips on the Rosdol part (2).

The wood chips in the rosdol part (2) are supplied with air through the air supply groove and move to the moving rosdol a◆ while burning.
The ash layer formed on the outer surface is scraped off by the reciprocating motion of the moving Rosdol α◆, resulting in complete combustion.

The heat generated by the above combustion is trapped inside the cylindrical member (2), and the wood chips on the heating part (G) are heated and pyrolyzed to generate a large amount of generated gas, which is combusted and causes a flame. released as.

Furthermore, even if the conveyor (2) is stopped, the fuel in the early stage of Hiro combustion remains as a smoldering flame near the dispersion part (2) of the fixed loss dollar (to), and it is difficult to restart the conveyor (2). ) Automatically reburns.

Since the present invention is configured as described above, the Rosdol pipe is surrounded by the open cylindrical member in front of the Rosdol pipe, so that the A-compressed wood chips supplied to the heating section are heated and pyrolyzed to produce a large amount. It begins to generate gas.

The above-mentioned large amount of produced gas is released as a flame, and compared to conventional combustion devices, more of the produced gas is combusted as produced gas, thereby improving thermal efficiency.

Therefore, a large amount of heat can be obtained even with a small combustion device.

Furthermore, the thermal decomposition of compressed wood chips reduces the generation of ash and distillate, which has the effect of suppressing clinker generation and prevents deterioration of combustion efficiency.

Therefore, the intended purpose is achieved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the wood chip combustion apparatus of the present invention, and FIG. 2 is a cross-sectional perspective view of the main parts. In the figure (2)...Conveyor (6)...Cylindrical member 0...Fixed loss dollar α ...Flange patent applicant Masa Hayakawa, agent of Meiko Sangyo Co., Ltd.

Claims (1)

[Claims] In front of the outlet of the conveyor for transporting wood chips, a rosdol is provided that slopes downward as it approaches the front, and a rosdol part that burns wood chips on the upper surface is formed in the lower part of the rosdol. A wood chip combustion device is provided in which a heating section for thermally decomposing wood chips is formed between a conveyor outlet and a loss portion in the covering member by horizontally surrounding the wood chip with a covering member having an open front end.