JPS5838273Y2 - waste melting furnace - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waste melting furnace in which a combustion chamber is connected to a gas discharge passage and a molten material removal passage, and a cooling liquid tank is provided for solidifying the molten material from the connecting passage.

In the above furnace, there is room for improvement in terms of heat loss due to evaporation of the coolant due to radiant heat transfer from high-temperature exhaust gas from the combustion chamber, as well as miniaturization of solidified materials and reduction in strength due to rapid cooling of high-temperature molten material. The object of the present invention is to make it possible to effectively control the above-mentioned heat loss, miniaturization of solidified materials, and decrease in strength with relatively simple modifications.

Next, embodiments of the present invention will be described with reference to illustrative drawings.

A combustion chamber 3 having a conical heat reflecting wall 1 and a burner 2 disposed downward in the center thereof is connected to a supply path 4 for lowering the weight of the material to be treated over its entire circumference. A plurality of input hoppers 5 are provided in the supply channel 4, and various industrial wastes such as municipal waste, heat-treated waste thereof, or molded and dried sludge generated from water treatment such as sewage are charged and lowered in the supply path 4 and combusted. It is configured to supply to chamber 3.

In the center of the furnace bottom wall 6 extending from the combustion chamber 3 to the lower part of the supply path 4,
The gas discharge path/melt removal path 7 is connected, the furnace bottom inner surface 6a is formed into a conical shape with the center side lowered, and the furnace bottom wall 6 is configured to rotate by a drive device 8. The waste from the passage 4 is moved along the inner surface 6a of the furnace bottom to the combustion chamber 3, and the waste is combusted and then melted, and the molten material and combustion gas are discharged downward. It is.

A post-combustion chamber 10 equipped with an auxiliary burner 9 is connected to the outlet passage 7, a horizontal flue 11 is connected to the post-combustion chamber 10, and a cooling liquid tank 12 is provided below the post-combustion chamber 10, thereby discharging the combustion gas. After being completely combusted, the molten material is sent to the flue 11, and the molten material is cooled and solidified.

Furthermore, a belt conveyor 14 and a hopper 15 are provided to collect the solidified material in the cooling liquid tank 12 into a container 13.

A receiving device 16 is provided in the cooling liquid tank 12 in a partially or completely submerged state near the liquid surface, and the receiving device 1
6 is configured to be rotatable around a horizontal axis 18 by a drive device 17, and by slowly cooling the molten material on the receiver 16, it is possible to control the refinement and strength reduction of the solidified material, and also to control the reduction in the strength of the solidified material. The structure is configured to control the generation of steam from the tank 12 by radiant heat from the tank 12, and is further configured to allow the solidified material to fall into the tank 12 when a suitable amount of solidified material remains on the receiving fixture 16.

In addition, as shown in FIG. 2, a float 19 is connected to the catch 16 to raise and lower it as the liquid level in the tank 12 changes, and the distance between the catch 16 and the drive device 17 can be changed. Both 16 and 17 are configured to be allowed by the action of the tensioning wheel 21 on the interlocking winding transmission device 20,
Regardless of the liquid level in the tank 12, the structure is such that the above-mentioned solidified matter atomization control and steam generation control are always performed satisfactorily by the receiving device 16.

The specific configuration of the receiving device 16 can be modified in various ways, such as by sliding an inclined plate-like member to open and close the solidified material drop port.

In order to make the catch 16 follow the coolant level, for example, a drive device that moves the catch 16 up and down based on liquid level displacement detection may be provided, or a drive device manually operated may be used to make the catch 16 follow the coolant surface. The specific configuration can be modified in various ways, such as configuring the tool 16 to be moved up and down.

In summary, the present invention provides the above-mentioned waste melting furnace.
A melt receiving device 16 is provided in a state where it is located near the liquid surface of the cooling liquid tank 12, and the receiving device 16 can be changed to a state in which a placed object is dropped into the cooling liquid, and
It is characterized by being configured to be able to rise and fall following the vertical displacement of the coolant level.

That is, by the action of the receiver 16 and the solidified or molten material placed thereon, the radiation heat transfer from the high-temperature exhaust gas to the coolant can be controlled, thereby effectively suppressing heat loss due to evaporation of the coolant. Became.

By cooling most of the molten material slowly on the receiver 16 and then supplying it to the cooling liquid, it is possible to effectively suppress the fineness of the solidified material and the decrease in strength caused by cooling. It is now possible to prevent the harmful effects of pulverization during transportation and storage.

Furthermore, the coolant level is likely to shift due to changes in the amount of chemical substances below the liquid level, imbalances in supply and drainage, etc.
After configuring it so that it can be raised and lowered according to the displacement of the coolant level, the function of preventing heat loss, miniaturization of solidified materials, and strength reduction by the above-mentioned receiver 16 can always be reliably obtained. became.

In addition, a relatively simple modification of simply attaching the catch 16 so that it can be raised and lowered is sufficient, and the practical value can be increased, making it possible to provide a waste melting furnace that is useful as a whole.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the waste melting furnace according to the present invention, with FIG. 1 being a schematic longitudinal sectional view and FIG. 2 being a longitudinal sectional view of a cooling device. 3... Combustion chamber, 7... Gas discharge path and melt extraction path, 12... Cooling liquid tank, 16...
...Receiver, 17...Float.

Claims (1)

[Scope of Utility Model Registration Claim] ■ Connecting the combustion chamber 3 to the gas exhaust passage and melt extraction passage 7,
A waste melting furnace is provided with a cooling liquid tank 12 for solidifying the molten material from the extraction passage 7, and is provided with a molten material receiving device 16 located near the liquid surface of the cooling liquid tank 12. , the receiving device 16 is configured to be able to change the state in which the placed object falls into the cooling liquid, and to be able to move up and down following the downward displacement of the cooling liquid level. material melting furnace. (2) The catch 16 is formed of a plate-like member that can swing up and down, and a float 19 is provided to automatically move the catch 16 up and down to follow the coolant level. A waste melting furnace according to claim 2 of the utility model registration claim.