JPS6357684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an apparatus for incinerating and melting solid waste such as municipal waste and industrial waste.

The air outlet in the melting type after-combustion chamber of the conventional processing equipment of this type is disclosed in, for example, Japanese Patent Application No. 1983-
58031 (Japanese Unexamined Patent Publication No. 55-152584), since it was applied to the furnace wall of the post-combustion chamber, the inner surface of the furnace wall became a high-temperature molten zone, resulting in the following drawbacks. That is,
While melting the furnace wall made of castable,
This leads to clinker adhesion, and the generation of this clinker causes melting inhibition, and due to the clinker adhesion, it is extremely difficult to discharge the remaining ash in the furnace when the plant is shut down.

The present invention provides an apparatus for incinerating and melting solid waste, in which the air blowing position used for combustion and melting of incineration residue in a melting type post-combustion chamber is adjusted to
It is installed inside the post-combustion chamber slightly toward the center of the furnace wall surface, and actively creates an ash layer between the furnace wall surface and molten slag to protect the furnace wall and concentrate the high-temperature molten zone in the center of the furnace. The purpose of this is to enable stable operation of the furnace.

For this reason, the configuration of the present invention includes a main combustion chamber for burning solid waste, and a melting type that is connected to the combustion gas and combustion residue discharge side of the main combustion chamber to burn the residue and convert it into molten slag. In a solid waste incineration and melting treatment apparatus equipped with an after-combustion furnace having an after-combustion chamber, the position at which air is blown into the melting-type after-combustion chamber forms an ash layer on the inner surface of the furnace wall of the after-combustion chamber. an air blowing tube protruding inward from the furnace wall of the after-combustion chamber slightly toward the center, and the cross-sectional shape of the after-combustion chamber is rectangular from the opposing long sides and the opposing short sides. Moreover, several of the air blowing tubes are provided on each of the opposing long sides of the furnace wall, and the air blowing tubes are arranged so that the blowing ports of the air blowing tubes are in opposing positions. It is characterized by being

An embodiment of the present invention will be described below with reference to the drawings.

In the drawing, 1 is a main combustion chamber formed in a water tube type rotary cylindrical incinerator, and although not shown, the furnace includes an inlet for solid waste such as garbage, an ignition burner, a wind box, etc. It is provided. Reference numeral 2 denotes an after-combustion furnace, which is connected to the combustion gas and combustion residue discharge side of the main combustion chamber 1 to form a packed layer of the combustion residue, burn the residue, and convert it into molten slag. It has 3 rooms. 4 is an air supply device including a blower that sends air used for combustion and melting in the after-combustion chamber 3; 5 is a nozzle-type air blowing tube that blows air from the air supply device 4 into the after-combustion chamber 3; 6; is a gas suction port provided below the after-combustion chamber 3. Further, as shown in Fig. 2, the cross-sectional shape of the melting type after-combustion chamber 3 is a rectangle consisting of opposing long sides and opposing short sides. Each of them is provided with three air blow-off tubes 5, and the air blow-off tubes 5 are arranged so that the blow-off ports of the air blow-off tubes 5 are in opposing positions.

The air blowing tube 5 has a dimension x in FIG.
As shown by the dimension y in FIG. 2, it protrudes from the inner surface of the furnace wall of the post-combustion chamber 3 toward the center, and air is blown out at the protruding position.
The appropriate distance between x and y is 70 to 200 mm.

In the solid waste incineration and melting treatment apparatus configured as described above, the solid waste 7 of the garbage supplied into the main combustion chamber 1 is incinerated while being burned in the chamber 1, and the incineration residue 8 is It is guided to the melting type after-combustion chamber 3. This residue 8 is held in a filled state in the post-combustion chamber 3, and while it gradually moves downward,
As shown by arrow 9, high-temperature air of approximately 500°C supplied from air supply device 4 and blown out from air blow-off tube 5 burns the unresolved carbon in residue 8, and the heat generated at this time and after-combustion are The main combustion chamber 1 is forced to move through the chamber 3 in the same direction as the residue 8 moves.
It is heated and melted by the retained heat of a part of the combustion gas 10 from the main combustion chamber 1 and the radiant heat obtained from the combustion gas 11 in the main combustion chamber 1, becomes molten slag 13, reaches the slag cooling tank, and exhaust gas 14 is discharged through the gas suction port 6. Here, each of the air blowing tubes 5 protrudes from the furnace wall surface by x and y towards the center of the furnace, so by blowing out air at these protruding positions, as shown in FIG. In addition, an ash layer 15 is created on the furnace wall surface to prevent the generation of clinker and to protect the furnace wall. Also, after-combustion chamber 3
A high-temperature molten zone 12 is created in the center of the molten metal, a stable molten state is obtained, and stable operation can be maintained. In particular, since the air outlets of the respective air outlet pipes 5 provided on the furnace wall corresponding to the opposing long sides of the after-combustion chamber 3 are arranged at opposing positions, the opposing air outlets This prevents clinker from adhering to each air outlet from being blown off by the air blown from the air outlet, thereby preventing the air outlet from being blocked, and prevents ash from forming on the furnace wall surface between adjacent air blowing tubes 5. The layers are formed in an orderly manner.

As described above, the present invention allows the blowing position of the air used for combustion and melting of incineration residue in the melting-type post-combustion chamber connected to the main combustion chamber for burning solid waste to be adjusted to the furnace wall surface of the post-combustion chamber. Since it is located slightly more centrally, an ash layer is created between the furnace wall surface and the molten slag to protect the furnace wall, eliminating burn-through on the furnace wall and clinker adhesion. An ash layer is formed in an orderly manner on the furnace wall corresponding to the opposite long sides of the chamber, and a high-temperature molten zone is created in the center of the furnace, making it possible to maintain stable operation and stabilize the product. can.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention.
The figure is a partially cutaway longitudinal sectional front view, and FIG. 2 is a sectional plan view taken along cutting line A--A in FIG. 1. 1... Main combustion chamber, 2... After-combustion furnace, 3... Melting type after-combustion chamber, 4... Air supply device, 5... Air blow-off tube, 7... Solid waste, 8... Incineration residue, 12
...High temperature molten zone, 13... Molten slag, 15...
ash layer.

Claims (1)

[Claims] 1. An after-combustion furnace having a main combustion chamber for burning solid waste, and a melting-type after-combustion chamber connected to the combustion gas and combustion residue discharge side of the main combustion chamber to burn the residue and convert it into molten slag. In the solid waste incineration and melting processing apparatus, the position of air blowing into the melting type after-combustion chamber is such that an ash layer is formed on the inner surface of the furnace wall of the after-combustion chamber. an air blowing tube projecting inward from the furnace wall slightly toward the center, and the cross-sectional shape of the after-combustion chamber is rectangular with opposing long sides and opposing short sides, and A plurality of the air blowing tubes are provided on each of the opposing long sides of the furnace wall, and the air blowing tubes are arranged so that the blowing ports of each of the air blowing tubes are at opposing positions. Solid waste incineration and melting processing equipment.