JPH0148310B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is particularly aimed at efficiently and continuously burning particulate matter consisting of small combustible pieces such as rice husks and sawdust.
This relates to a granular combustion furnace that can extract the combustion heat in the form of hot air.

BACKGROUND TECHNOLOGY A conventional granule combustion furnace, as shown in Fig. 1,
A fumigation chamber f consisting of an inner peripheral porous wall a and an outer peripheral porous wall d is provided inside the combustion cylinder b, and particulate matter is fumigated inside the fumigation chamber f to generate combustible gas.

Further, a water-containing waste drying and incineration apparatus in which a central tower furnace and a leaning tower furnace are provided inside a cylindrical incinerator to form a cone-shaped grate is known as Japanese Patent Publication No. 45-8950.

Problems to be Solved by the Invention However, in the conventional granular material combustion furnace, when supporting the inner peripheral porous wall a inside the combustion cylinder b, there is a gap between the inner peripheral porous wall a and the outer peripheral porous wall d. Several stays e are welded to the fumigation chamber f.
The inner peripheral porous wall a cannot be easily removed from the inside of the combustion tube b, and
It was difficult to inspect the inner peripheral porous wall a and the inside of the fumigation chamber f, or to replace the inner peripheral porous wall.

In addition, those described in Japanese Patent Publication No. 45-8950 are
Flame or high-temperature hot air was injected from the injection holes of the central tower furnace and the leaning tower furnace into the cone-shaped grate, and the materials to be incinerated that fell into the cone-shaped grate from the inlet were incinerated.

It is an object of the present invention to address the above-mentioned problems and to
The granular material conveying means feeds the granular materials into the fumigation chamber from below, and the granular materials in the fumigation chamber are pushed up from below by the new granular materials fed by the granular material conveying means and moved upwards, creating an obstruction like a stay in the fumigation chamber. There are no objects at all, and the movement of particulates upwards in the fumigation chamber is smooth, ensuring uniformity in the rise of particulates inside the fumigation chamber, and the attachment part of the inner peripheral porous wall can be removed from the support of the combustion tube. It is an object of the present invention to provide a granular material combustion furnace in which the inner peripheral porous wall can be taken out to the outside of the combustion cylinder by removing it, and the inner peripheral porous wall and the fumigation chamber can be inspected or the inner peripheral porous wall can be easily replaced.

Means for Solving the Problems The granular material combustion furnace of the present invention includes a conical outer peripheral porous wall with a larger diameter at the top inside the combustion cylinder, and a predetermined interval above the outer peripheral porous wall. A separate inner peripheral porous wall is provided, and the inner peripheral porous wall is recessed in the center to form an inner cylinder, and a mounting part is formed on the upper peripheral edge of the inner cylinder, and an upper wall is formed on the lower part. A conical part having a large diameter is formed, a ventilation chamber is formed around the inner peripheral porous wall, and a space between the outer peripheral porous wall and the conical shape of the inner peripheral porous wall is used as a fumigation chamber. ,
The inside of the inner peripheral porous wall is a combustion chamber, a support body for removably supporting the attachment part of the inner peripheral porous wall is provided inside the combustion cylinder, and a lower part of the outer peripheral porous wall communicates with the fumigation chamber. The structure is characterized in that a particulate material conveying means is provided.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 2, 1 is a combustion furnace, and the combustion furnace 1
A machine room 3 is provided in the lower part of the combustion section 2.

Inside the combustion cylinder b of the combustion section 2, a conical outer porous wall d with a larger diameter at the top is disposed, and an outer porous wall d is provided at a predetermined interval above the outer porous wall d. A separate inner peripheral porous wall a is provided, an annular air passage 4 is formed outside the outer peripheral porous wall d, and a porous bottom plate 5 is provided below the outer peripheral porous wall d.

A recessed inner cylinder c is provided in the center of the inner peripheral porous wall a, and a flange 6 is integrally formed on the upper peripheral edge of the inner cylinder c as a mounting part, and a lower part of the inner cylinder c has a large upper part. A conical portion with a diameter is integrally formed, and the inner circumferential porous wall a is formed from a porous plate except for the flange 6.

The upper edge of the outer peripheral porous wall d is in contact with the inner wall of the annular air blowing passage 4, the lower part of the outer peripheral porous wall d is connected to a pressure feed pipe 18, which will be described later, and the outer peripheral porous wall d is formed from a conical perforated plate. has been done.

The outer peripheral porous wall d is substantially fixed to the combustion tube b.

The peripheral edge of the porous bottom plate 5 is fixed to the inner wall of the annular air passage 4.

A ventilation chamber 7 surrounded by the inner wall of the annular ventilation passage 4 and the porous bottom plate 5 is located around the outer peripheral porous wall d inside the combustion cylinder b.
is formed, and a fumigation chamber f communicating with the ventilation chamber 7 is formed between the conical part of the inner peripheral porous wall a and the outer peripheral porous wall d, and the inner cylinder c of the inner peripheral porous wall a and the circular A primary combustion chamber 9 communicating with the fumigation chamber f is provided inside the conical part.
A secondary combustion chamber 10 communicating with the primary combustion chamber 9 is formed in the space above the inner peripheral porous wall a, and the primary combustion chamber 9 communicates with the ventilation chamber 7 via the fumigation chamber f. There is.

An upper plate 11 is provided at the top of the annular air passage 4,
The upper plate 11 is formed from a perforated plate with holes having a circumferential component.

A ash removal cyclone 12 communicating with the fumigation chamber f is connected to the side wall of the combustion tube b, and a hot air outlet duct 13 communicating with the secondary combustion chamber 10 is connected to the upper part of the cyclone 12.

An annular support 14 that removably supports the flange 6 of the inner porous wall a is protruded from the inner circumferential surface of the combustion part b, and the flange 6 of the inner porous wall a is attached to the support 14 of the combustion tube b. It is fixed with bolts etc.

A top cover 15 is removably provided on the top of the combustion tube b, and the top end of the opening of the combustion tube b is closed by the top cover 15.

A blower 16 for blowing air to the blower chamber 7 is provided inside the machine room 3 at the bottom of the combustion section 2.
A pressure feeding pipe 18, which serves as a granular material conveying means and is equipped with a conveying spiral body 19 inside, is provided on the side of 6.
The upper end of a pressure feed pipe 18 communicating with the fumigation chamber f is connected to the lower end of the outer peripheral porous wall d, and a motor 17 for driving a spiral body 19 is provided on the side of the pressure feed pipe 18 opposite to the blower 16. The lower end of the spiral body 19 is operatively connected to the motor 17 via a belt pulley.

A particulate material supply chute 20 is connected near the lower end of the pressure feed pipe 18 .

The air outlet of the blower 16 is connected to the annular air passage 4 of the combustion section 2.
and the lower part of the ventilation section 7, which are branched and connected to each other.

Next, the operation of this embodiment will be explained.

First, when the power to the combustion furnace 1 is turned on, the machine room 3
The motor 17 and the blower 16 inside are respectively driven, and the motor 17 rotates the spiral body 19, and the blower 16 sends air to the annular air passage 4 and the air blowing chamber 7.

Next, when the particulate matter is supplied from the particulate matter supply chute 20, the particulate matter is sent upward through the pressure feed pipe 18 as the spiral body 19 rotates, and the fumigation chamber f is filled with the particulate matter.

Therefore, when the particulate matter that has risen to the top of the fumigation chamber f is ignited, the fire eventually spreads over the entire area of the fumigation chamber f, and almost the entire area inside the fumigation chamber f becomes high temperature, and the particulate matter inside the fumigation chamber f is and releases flammable gases.

This combustible gas enters the primary combustion chamber 9 on the air flow generated by the blower 16, as shown by arrows in FIG.

In the primary combustion chamber 9, this flammable gas is transferred to the blower 1.
6, passing through the blowing chamber 7 and fumigation chamber f, most of the oxygen is combusted, and enters the secondary combustion chamber 10 as hot air along with the air flow.

In the secondary combustion chamber 10, the remaining unburned gas is also completely combusted, and the airflow becomes hot air.

The combustion heat of the combustible gas heats the air from the blower 16 to become hot air, which enters the hot air outlet duct 13 from the secondary combustion chamber 10 and is sent to a paddy dryer, a greenhouse, etc.

As long as particulate matter is supplied from the particulate supply chute 20, particulate matter remains in the fumigation chamber f, and the particulate matter in the fumigation chamber f is pushed up from below by new particulate matter sent in by the spiral body 19. gradually move upwards.

The particulate matter that reaches the upper part of the fumigation chamber f becomes ash from which all combustible gases have been liberated, and the ashes of the particulate matter in the fumigation chamber f are distributed over the porous upper plate of the annular ventilation passage 4 as the particulate matter rises from below. 11, and is carried by the swirling wind blown from the upper plate 11 of the annular air passage 4 sent from the blower 16 and guided to the cyclone 12, where it is separated from the air.

The above combustion process is performed continuously.

In this way, the particulate matter in the fumigation chamber f is continuously and efficiently combusted, and the combustion heat is effectively utilized in various ways as hot air taken out from the hot air outlet duct 13.

Also, remove the upper cover 15 from the upper part of the combustion cylinder b,
Next, the flange 6 of the inner peripheral porous wall a is removed from the support 14 of the combustion cylinder b by unscrewing the bolts that fix the flange 6 of the inner peripheral porous wall a and the support 14 of the combustion cylinder b. , if the inner peripheral porous wall a is taken out from the upper end of the opening of the combustion cylinder b, the inner peripheral porous wall a
It is also possible to inspect the inside of the combustion cylinder b or replace the inner peripheral porous wall a.

Furthermore, after inspecting the inside of the inner peripheral porous wall a and the combustion tube b or replacing the inner peripheral porous wall a, insert the inner peripheral porous wall a into the combustion tube b from the upper end of the opening of the combustion tube b, and After the flange 6 of the porous wall a is placed on the support 14 of the combustion tube b, the flange 6 of the inner peripheral porous wall a and the support 14 of the combustion tube b are fixed with bolts.

FIG. 3 shows another embodiment of the present invention, in which a plurality of locking holes are provided at intervals in the flange 6 of the inner peripheral porous wall a, and the flange 6 of the inner peripheral porous wall a is provided with a plurality of locking holes. It is designed to be removably fixed to the support body 14 of the combustion tube b by bayonet connection.

Effects of the Invention As described above, according to the particulate matter combustion furnace of the present invention, the particulate matter conveying means sends the particulate matter into the fumigation chamber from below, so that the particulate matter in the fumigation chamber is transported by the particulate matter conveying means. The new granules brought in can be pushed up from below and moved upwards, and since there are no obstructions such as stays in the fumigation chamber, the granules can be moved upwards smoothly in the fumigation chamber. It is possible to ensure the uniformity of the rise of particulate matter inside the chamber, and in the case of such combustion furnaces, the inner peripheral porous wall is easily damaged by friction with particulate matter and high temperature. By removing the attachment part of the peripheral porous wall from the support of the combustion tube, the inner peripheral porous wall can be taken out to the outside of the combustion tube, making it easier to inspect the inner peripheral porous wall and the fumigation chamber or to replace the inner peripheral porous wall. can be done.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a conventional granular material combustion furnace, FIG. 2 is a vertical sectional view of a granular material combustion furnace according to an embodiment of the present invention, and FIG. 3 is a schematic longitudinal sectional view of a conventional granular material combustion furnace. FIG. 3 is a plan view of an inner peripheral porous wall. DESCRIPTION OF SYMBOLS 1... Combustion furnace, 2... Combustion part, 3... Machine room, 4... Annular ventilation path, 5... Porous bottom plate, 6... Flange, 7... Ventilation chamber, 9... Primary combustion chamber, 10... Secondary combustion chamber, 11
...Top plate, 12...Cyclone, 13...Hot air outlet duct, 14...Support, 15...Top lid, 16...Blower,
17...Motor, 18...Pressure pipe, 19...Spiral body, 20...Particulate matter supply chute, a...Inner peripheral porous wall, b...Combustion cylinder, c...Inner cylinder, d...Outer peripheral porous wall, e
...stay, f...fumigation chamber.

Claims (1)

[Claims] 1 A conical outer peripheral porous wall with a larger diameter at the top is provided inside the combustion cylinder, and a separate inner peripheral porous wall is provided above this outer peripheral porous wall at a predetermined interval. This inner peripheral porous wall is recessed in the center to form an inner cylinder, the upper peripheral edge of which is formed with a mounting part, the lower part of which is formed with a conical part with a larger diameter at the top, and the outer peripheral porous wall A ventilation chamber is formed around the wall, a fumigation chamber is formed between the outer peripheral porous wall and the conical shape of the inner peripheral porous wall, and a combustion chamber is formed inside the inner peripheral porous wall, and a combustion chamber is formed between the outer peripheral porous wall and the conical shape of the inner peripheral porous wall. A granular material combustion furnace, characterized in that a support body for removably supporting a mounting portion of the inner peripheral porous wall is provided therein, and a granular material conveying means communicating with the fumigation chamber is provided at a lower part of the outer peripheral porous wall. .