JPS5840088B2 - Industrial waste incineration method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for incinerating various industrial wastes, such as municipal waste, heat-treated waste thereof, and molded and dried sludge generated from water treatment such as sewage.

In this type of incineration treatment method, the furnace is configured to effectively utilize radiation heat transfer in consideration of saving fuel during incineration, but there are limitations depending on the configuration of the furnace itself. This has not led to significant fuel savings.

Therefore, in order to increase the amount of radiant heat by increasing the flame brightness, the present invention supplies pulverized coal mixed with industrial waste to the combustion chamber, and combusts the pulverized coal as the waste burns in the combustion chamber. By constructing the pulverized coal so that it floats in the flame, it forms a bright flame with an extremely large amount of radiant heat, which can significantly save fuel, and prevents clogging of the burner nozzle when supplying the pulverized coal. The purpose is to enable supply without causing problems such as

The method for incinerating industrial waste according to the present invention consists in mixing pulverized coal into the industrial waste consisting of city garbage and other dry waste in the process of feeding it into the combustion chamber, and from this structure, the following steps are taken: It has the following effects.

In other words, by mixing pulverized coal into industrial waste such as urban garbage and dry waste during the process of feeding it into the combustion chamber, which is generally in a relatively dry state, this pulverized coal is This prevents moisture from absorbing moisture from the waste and dissolving it into the waste, resulting in a cake-like formation.As a result, when the pulverized coal is burned in the combustion chamber, the pulverized coal has a lower combustion gas ejection pressure from the combustion burner. It is stirred up by the flame and rises up, forming a bright flame within the combustion flame, and as a result, radiation heat transfer from the high-temperature gas in the combustion chamber to the processed material can be carried out extremely efficiently. Therefore, the amount of fuel required to apply heat from the outside can be significantly reduced, and a method useful for waste treatment, where economic efficiency is important, has been obtained.

In addition, when mixing pulverized coal into the industrial waste,
For example, it is conceivable to supply pulverized coal to the air supply path to the combustion burner, but compared to such a method, the present invention prevents the combustion gas of pulverized coal from adhering to the burner nozzle and clogging it. This is advantageous in that it avoids disadvantages such as those that occur.

Embodiments of the present invention will be described below based on the drawings.

First, to explain the apparatus used in the method of the present invention, a material to be treated is supplied under its own weight to a combustion chamber 3 having a conical heat reflecting wall 1 and a burner 2 disposed downward in the center thereof. A plurality of input hoppers 5 are installed at the upper part of the supply channel 4, and various industrial wastes such as municipal waste, heat-treated waste thereof, and molded dried sludge generated from water treatment such as sewage can be collected. The structure is such that the material is charged and lowered in the supply path 4 and then supplied to the combustion chamber 3.

A device 6 is provided to supply pulverized coal as a pulverized combustible material to a hopper 5 and mix it into the waste in the supply path 4, so that the pulverized combustible material is combusted as the waste is burned in the combustion chamber 3. It is configured so that it floats in the flame and forms a bright flame with extremely high radiation ability, thereby melting the waste only by self-combustion, or greatly reducing the amount of heat generated from the burner 2. The structure is such that it can be melted in a molten state.

In the center of the furnace bottom wall 7 extending from the combustion chamber 3 to the lower part of the supply path 4,
A gas discharge path/melt removal path 8 is connected, the furnace bottom inner surface 7a is formed into a conical shape with the center side being lower, and the furnace bottom wall 7 is configured to rotate by a drive device 9. The waste material from the combustion chamber 3 is moved along the inner surface 7a of the furnace bottom to the combustion chamber 3, and the waste material is combusted and then melted, and the molten material and combustion gas are discharged downward. be.

A post-combustion chamber 11 equipped with an auxiliary burner 10 is connected to the outlet passage 8, a horizontal flue 12 is connected to the post-combustion chamber 11, a cooling water tank 13 is provided below the post-combustion chamber 11, and the combustion gas is The unburned suspended matter is completely combusted and then sent to the flue 12, and the molten matter is cooled and solidified.

As shown in FIG. 2, the inner peripheral surface of the after-combustion chamber 11 is configured to have a circular shape or a shape close to it, and the ejection direction of the auxiliary burner 10 is set close to the tangential direction of the inner peripheral surface. The structure is configured to further ensure complete combustion of gas and unburned suspended matter from the combustion chamber 3 by swirling flow within the combustion chamber 3, and as shown in FIG. 3, a checker 14 is installed near the entrance of the flue 120. The structure is such that gas and unburned suspended matter are more completely combusted, and as a whole, odor pollution and dust pollution caused by exhaust gas being released into the atmosphere can be reliably prevented.

A plate-shaped catch 15 is provided in the cooling field water tank 13 with its lower surface sunk near the water surface, and the catch 15 is configured to be rotatable around a horizontal shaft 17 by a drive device 16 to melt the water. By slowly cooling the object on the catcher 15, it is possible to suppress the fineness of the solidified material and to suppress the generation of steam from the water tank 13 due to the radiant heat from the post-combustion chamber 11. The structure is such that when an appropriate amount of solidified material remains on the tool 15, the solidified material can be dropped into the water tank 13.

In addition, as shown in FIG. 4, a float 18 is connected to the catch 15 to raise and lower it according to changes in the liquid level in the water tank 13, and the distance between the catch 15 and one drive device 160 can be changed. Both 15 and 16 are configured to be allowed by the action of the tension wheel 20 on the interlocking winding transmission 19, and the above-mentioned solidified matter atomization is always suppressed by the catch 15 regardless of the liquid level in the water tank 13. and is configured to effectively suppress steam generation.

Furthermore, a belt conveyor 21 and a hopper 22 are provided to collect the solidified material in the water tank 13 into a container 24.

To perform incineration using the above-mentioned apparatus, first, various types of waste such as municipal garbage, heat-treated waste thereof, or molded dried sludge generated from water treatment such as sewage are transferred to the supply channel 4.
On the other hand, the pulverized coal was loaded into a device 6 for mixing the pulverized coal into the waste in the supply path 4, and the pulverized coal was mixed with the industrial waste. In this state, the supply path 4 is simultaneously lowered, and these are fed into the combustion chamber 1 and combusted.

[Brief explanation of the drawing]

The drawings show an apparatus used in the industrial waste incineration treatment method according to the present invention, in which Fig. 1 is a schematic vertical cross-sectional view, Fig. 2 is a cross-sectional view of the after-combustion chamber, and Fig. 3 is a main part of the flue. FIG. 4 is a perspective view, and FIG. 4 is a longitudinal sectional view of the cooling device. 3... Combustion chamber, 4... Supply path, 6... Pulverized coal mixing device.

Claims (1)

[Claims] 1. A method for incinerating industrial waste, which is characterized by mixing pulverized coal into industrial waste consisting of municipal garbage and other dry waste during the process of feeding it into a combustion chamber.