JP3085778B2 - Melt treatment equipment for sludge, incinerated ash, crushed incombustibles, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to incineration ash after incineration of sewage sludge or municipal waste after treating municipal wastewater and the like.
In addition, the present invention relates to a melting treatment device for melting crushed incombustibles and the like to convert the slag into slag.

[0002]

2. Description of the Related Art A conventional apparatus for processing sludge, incineration ash, crushed incombustibles, and the like will be described below with reference to the drawings. FIG. 2 is a cross-sectional view of a conventional melting apparatus for sludge, incinerated ash, crushed incombustibles, and the like, and FIG. 3 is an enlarged sectional view of a main part. The apparatus for melting sludge and the like in this embodiment is a rigid rotary furnace, in which a main combustion chamber 3 is formed by an inner cylinder 1 and an outer cylinder 2, and a combustion device 4 is provided at the center of the inner cylinder 1 forming a ceiling. Is provided. Combustion air is supplied from a blower 5 to the combustion device 4, and fuel such as kerosene is supplied from a fuel tank 6 and burns.
A heat source is provided for heating and melting the melt 7 such as sewage sludge, incinerated ash, and crushed incombustibles stored in the inside. A supply hopper 8 is provided on the outer peripheral portion of the outer cylinder 2, and is configured to charge the melt 7 into the main combustion chamber 3. The supply of the melt 7 into the main combustion chamber 3 is uniformly performed over the entire circumference by the rotation of the outer cylinder 2. In this melting apparatus, the furnace load can be adjusted by vertically moving the inner cylinder 1, which is the ceiling of the main combustion chamber 3. A secondary combustion chamber 9 is provided below the main combustion chamber 3, and is configured to completely burn unburned gas. A combustion device for secondary combustion is provided on a side wall of the secondary combustion chamber 9.
A flue for exhausting combustion gas, with 10 provided
11 are provided. A slag conveyor 12 is provided below the secondary combustion chamber 9, and is configured to transport the molten slag out of the furnace.

[0003] In the melting apparatus for sludge, incinerated ash, crushed incombustibles, etc., when the melt 7 is supplied from the supply hopper 8 to the main combustion chamber 3, the melt 7 is rotated by the rotation of the outer cylinder 2. Is distributed evenly over the entire circumference of. Then, the inner peripheral surface side of the melt 7 is burned and melted by the high-temperature combustion heat of the combustion device 4. The melt 7 thus burned and melted is turned into a molten slag, and continuously flows down from the slag port 13 at the furnace bottom together with the high-temperature combustion gas. This molten slag solidifies in a pit at the lower part of the secondary combustion chamber 9 and is taken out by the slag conveyor 12 in a safe state. In the secondary combustion chamber 9, the unburned gas that has not been burned in the main combustion chamber 3 is completely burned and exhausted from the flue 11, and is processed by a flue gas treatment device (not shown) and released to the outside air.

[0004]

However, in the combustion apparatus 4 provided in the above-described conventional melting processing apparatus, the combustion apparatus 4 shown in FIG.
As shown in the figure, since the spread of the flame of the burner (not shown) of the combustion device 4 is small, the molten material 7A remains in a lump without burning and melting at the lower portion of the outer periphery of the inner cylinder 1 in the main combustion chamber 3. I will. In addition, in the above-mentioned conventional melting apparatus, there is a problem that the melting processing capacity is reduced because the melting area is reduced accordingly.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and does not cause the molten material to be solidified without melting in the main combustion chamber.
An object of the present invention is to provide a melting apparatus for incinerated ash and crushed incombustibles.

[0006]

Means for Solving the Problems The sludge, incinerated ash of the present invention,
Melt processing equipment for crushed incombustibles, etc., uses sludge, incinerated ash, and combustion heat for burning crushed incombustibles, etc., as heat sources by the combustion device provided in the main combustion chamber to produce sludge, incinerated ash, crushed incombustibles, etc. In a melt processing apparatus that melts a melt, a low frequency generator that irradiates a low frequency to the combustion air is provided in the middle of an air duct that supplies combustion air to a combustion device in a main combustion chamber.

[0007]

According to the above construction, by irradiating the combustion air flowing through the air duct with a low frequency, the combustion air receives low-frequency energy and becomes air vibrating at a low frequency.
This low-frequency air is sent into the combustion device, mixed with fuel and burned, so that the flame from the burner of the combustion device has a spread, and the melting area of the molten material in the main combustion chamber is expanded to cover a wide area. In addition to enabling melting of the melt, the melting ability of sludge, incinerated ash, crushed incombustibles, and the like is improved.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a melting apparatus for sludge, incinerated ash, crushed incombustibles, and the like according to one embodiment of the present invention. The melting treatment apparatus for sludge and the like of this embodiment has the same basic structure as the conventional melting treatment apparatus, and includes a main combustion chamber 23 including an inner cylinder 21 and an outer cylinder 22 at an upper portion, and is provided by a supply hopper. Main combustion chamber
A melt 24 such as sewage sludge, incineration ash, crushed incombustibles, etc. is charged into 23. A combustion device 25 protrudes from the center of the inner cylinder 21, and combustion air and fuel such as kerosene are supplied into the combustion device 25 and burned.
Is melted. A secondary combustion chamber is provided at a lower portion of the main combustion chamber 23, and a side wall of the secondary combustion chamber is provided with a combustion device for secondary combustion and a flue for discharging burned combustion gas. ing. In addition, a slag conveyor is provided at a lower part of the secondary combustion chamber, and is configured to transport the molten slag to the outside of the furnace.

This embodiment is different from the conventional example in that
The point is that a low-frequency generator 28 that changes combustion air flowing through the air duct 27 into low-frequency air is provided in the middle of an air duct 27 that communicates the combustion device 25 with the combustion device 25. The low frequency generator 28 is a device for generating a low frequency of 10 Hz to 20 Hz, and uses a known low frequency device.

Next, the operation of the above-structured sludge, incinerated ash, crushed incombustibles, etc. melting apparatus which is different from the conventional example will be described.
By irradiating the combustion air flowing through the air duct 27 with a low frequency, the combustion air receives low-frequency energy and vibrates to become low-frequency vibrating combustion air. When this low-frequency combustion air is sent into the combustion device 25 to burn fuel, the flame from a burner (not shown) of the combustion device 25 spreads into the main combustion chamber 23. The flame spread in the main combustion chamber 23 in this manner can burn and melt the melt 24 that has solidified at the lower portion of the outer periphery of the inner cylinder 21 that could not be burned and melted by the conventional melting processing apparatus. As described above, by expanding the melting area of the melt 24 in the main combustion chamber 23, the melt 24 can be melted over a wide range, and the melting ability is improved.

In the above embodiment, the rigid rotary furnace having the inner cylinder 21 and the outer cylinder 22 has been described. However, it is needless to say that the present invention is not limited to this type of melting furnace.

[0012]

As described above, according to the present invention, with the above-described structure, the flame of the burner of the combustion device is spread into the main combustion device, thereby reducing sludge, incinerated ash, crushed incombustibles and the like in the main combustion chamber. The melting area of the melt is enlarged, the melt in the main combustion chamber is melted, and a wide range of melt can be melted, and the melting ability can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a melting apparatus for sludge, incinerated ash, crushed incombustibles, and the like according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional apparatus for melting sludge, incinerated ash, crushed incombustibles, and the like.

FIG. 3 is a cross-sectional view of a main part of a conventional melting processing apparatus.

[Explanation of symbols]

 23 Main Combustion Device 24 Melt 25 Combustion Device 27 Air Duct 28 Low Frequency Generator

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23G 5/00 F23G 5/44 F23L 7/00 F23L 1/00-1/02 F23L 9/00-9 / 06 F23C 7/00-7/08 F23C 11/00 F23C 11/04 F23D 14/84

Claims (1)

(57) [Claims] 1. A melting device for melting sludge, incinerated ash, crushed incombustibles, etc., using heat of combustion by a combustion device provided in a main combustion chamber and combustion heat of burning sludge, incinerated ash, crushed incombustibles, etc. as a heat source. Sludge, incineration characterized by providing a low frequency generator for irradiating combustion air with a low frequency in the middle of an air duct that supplies combustion air to the combustion device in the main combustion chamber in the melting treatment device Melting equipment for ash, crushed incombustibles, etc.