JPS6119313Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an incinerator and melting furnace for incinerating, melting, and cooling treatment materials such as sewage sludge, urban garbage, and various industrial wastes. A secondary combustion chamber is connected to the side, and a flow tube for discharging the melted product and high-temperature exhaust gas is connected to the secondary combustion chamber, and the melted product from the opening is directed downward through the flow tube. The present invention relates to an incinerator and melting furnace configured to supply high-temperature exhaust gas from the opening to a direct water-cooled cooling device disposed in the combustion chamber, and to discharge high-temperature exhaust gas from the opening through a flue connected to the secondary combustion chamber.

When the material to be processed is incinerated and melted and then cooled,
Conventionally, in general transportation, a water cooling type cooling device is installed directly below the downward opening of the melting furnace, and a secondary combustion chamber is installed in the middle of the flow path of the melt. In addition to incinerating and deodorizing the odor components in the exhaust gas, the molten material was solidified by direct water cooling to recover slag for use in backfilling. Combined with the heating effect of radiant heat from the combustion chamber,
A large amount of water vapor is generated in a direct water-cooled cooling system, which lowers the temperature of the secondary combustion chamber, resulting in a decrease in deodorizing efficiency and adverse effects on heat exchange when exhaust gas waste heat is used. Or, to compensate for this, there are problems such as an increase in fuel consumption.

Conventionally, as a means to eliminate such inconveniences, as shown in Japanese Utility Model Application No. 52-165583, a large amount of water vapor generated when the melt is dropped into a water tank is transferred to a secondary combustion chamber. In this case, (a) the suction pipe for the generated steam is separated from the flue of the secondary combustion chamber, and the water tank serving as a cooling device and the secondary combustion Because it is provided between the chamber and the chamber, the falling path of the molten material becomes long, and the overall size of the apparatus cannot be avoided.

(b) When the molten material is directly cooled, the recovered slag is fragmented into powder particles due to the shocking and sudden cooling of the material.

There was a drawback.

The technical problem to be solved by the present invention is to solve the above-mentioned drawbacks of the conventional technology, and to reduce the size of the entire device by reducing the amount of molten material from the secondary combustion chamber to the water surface of the cooling device. By shortening the falling path, the distance between the secondary combustion chamber, which is the heat source, and the water surface becomes shorter, making it easier to generate water vapor. By overcoming the difficulty that was thought to exist under mutually contradictory conditions, the means to prevent the decrease in water level have been overcome, and a. The generation of water vapor is suppressed to avoid a drop in temperature in the secondary combustion chamber.

b. Avoid fragmentation of the melt while using direct water-cooled cooling equipment.

This purpose can be achieved.

The technical means of the present invention taken to solve the above problems is to provide a secondary combustion chamber below the downward opening of the melting furnace, and to discharge the melted product and high-temperature exhaust gas into the secondary combustion chamber. A flow tube is arranged in series, and the molten material from the opening is supplied to a direct water-cooled cooling device disposed below via the flow tube,
An incinerator and melting furnace configured to discharge high-temperature exhaust gas from the opening through a flue connected to the secondary combustion chamber, the melted product of the cooling device being delivered to the lower end of the downflow tube from a lower position of the downflow tube. A slanted supply tube having a molten material receiving surface that descends toward the cooling device side is arranged in series across the receiving port of the molten material, so that the entire flow path of the molten material is formed into a curved path,
At least the molten material receiving surface of the inclined supply tube is configured to be an indirect cooling type, and the pusher is slidable along the molten material receiving surface, and the extrusion surface is configured to be an indirect cooling type. Further, the length of the slanted supply tube for transferring the molten material is determined by the length of the opening of the downstream tube to the secondary combustion chamber in the flow direction of the molten material in the slanted supply tube. Near an extension line of an imaginary line segment connecting an upper opening edge portion in the flow direction and a lower opening edge portion in the flow direction of the opening for the inclined supply tube of the downstream tube, and The length is set to be sufficient to position the melt receiving port of the cooling device on the downstream side in the flow direction.

The effects obtained by taking the above technical measures are as follows.

In other words, the flow path of the molten material is configured to be a curved path, and the molten material receiving port of the direct water cooling type cooling device is set further away from the range of action of radiant heat from the secondary combustion chamber than the virtual line segment. By locating it on the downstream side in the flow direction of the molten material, it is possible to bring the secondary combustion chamber and the cooling device close enough together to downsize the entire device. Therefore, a large amount of water vapor is generated from the water surface on the cooling equipment side.
There is an advantage that the flow can be effectively suppressed by the curved flow path itself.

In addition, the molten material receiving surface of the inclined supply tube that constitutes the flow path of the molten material is configured to be an indirect cooling type, and an extrusion tool that is slidable along the molten material receiving surface is provided. Therefore, not only can the molten material be slowly cooled by the indirect cooling type receiving surface that has a slow cooling effect,
When attempting to further promote the slow cooling effect by making the slope of the receiving surface gentle, the extrusion action of the extrusion tool prevents the fluidity of the melted material from decreasing and depositing on the receiving surface. Therefore, by making the slope of the receiving surface more gentle and making full use of its slow cooling effect,
It is advantageous in that it can effectively avoid fragmentation of the melted material, and it can also suppress the generation of a large amount of water vapor in the melted material that is fed into the cooling device after being sufficiently slowly cooled. Furthermore, making the slope of the receiving surface gentle in this manner is effective in further shortening the vertical length of the flow path of the melted material, thereby reducing the size of the entire apparatus.

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

The incineration and melting furnace for recovering slag by incinerating, melting and cooling materials to be treated such as urban garbage and various industrial wastes is a melting furnace A consisting of a storage and supply section 1 for materials to be treated and a combustion melting chamber 2. and a secondary combustion chamber B, into which the melted material and high-temperature exhaust gas flow through the downward opening 3 of the melting furnace A, incinerate and deodorize the odor components in the exhaust gas, and discharge the melted material from the flue 4; It consists of a direct water-cooled cooling device C that cools and recovers the water.

The incinerator melting furnace A includes a hopper 5 and a damper 6.
A burner 8 that horizontally transfers and supplies the material to be processed, which is supplied through the storage and supply section having a downward supply path, to the rotary hearth 7 of the melting chamber 2 and burns it downward.
The molten material is incinerated and melted through the opening 3 and supplied to the cooling device C through the opening 3, and the high-temperature exhaust gas is incinerated and deodorized by the burner 9 in the secondary combustion chamber B. It is discharged through a flue 4 connected to B.

The flow path for the melted material extends from the lower end of the flow tube 3A connected to the lower end opening of the secondary combustion chamber B to the melted material receiving port 19a of the cooling device C. Inclined supply tube 1 installed
0, the entire path is configured into a curved path.

The inclined supply cylinder 10 has a double-walled structure as a whole, and is configured to connect a cooling water supply pipe 11 and a discharge pipe 12 so as to indirectly cool the melted product, and has at least A pushing tool 14 is provided in the downstream route range for the treated material to push out the treated material adhering to the treated material receiving surface 13 toward the lower end of the slope.

This extrusion tool 14 includes an extruder 14a that slides along the processed material receiving surface 13, and a receiving surface 14b that receives the flowing material in the extruded state, and has a double wall entirely provided with a partition wall. In this structure, flexible pipes 15, 15 for supplying and discharging cooling water are connected, that is, it has an indirect cooling structure, and a cylinder 16 is operated intermittently by manual operation or a timer. Therefore, the sliding operation is automatically performed.

Furthermore, the inclined supply pipe 10 is arranged in a secondary combustion chamber B.
The water tank 19 of the cooling device C is
The secondary combustion chamber B of the downstream tube 3A is designed so that the surface of the cooling water stored therein is not directly heated.
and the inclined supply tube 1 of the downstream tube 3A.
0, the inclined supply cylinder 10
The radiant heat represented by the imaginary line segment The length in the flow direction is set so that the molten material receiving port 19a of the cooling device C is located near the action limit and on the downstream side in the flow direction.

The cooling device C includes a water tank 19 that directly cools the melted material supplied from the inclined supply tube 10 side.
and a bucket conveyor 18 that collects the cooled and solidified slag in a water-sealed state.

In the figure, reference numeral 17 denotes a scraper, which scrapes off material to be treated that has adhered to the receiving surface 14b or both side surfaces of the extruder 14 during its return stroke.

[Brief explanation of the drawing]

The drawings show an embodiment of the incinerator and melting furnace according to the present invention, with FIG. 1 being an overall longitudinal side view and FIG. 2 being a detailed view of the main parts. A...Melting furnace, B...Secondary combustion chamber, C...Recooling device, X...Virtual line segment, 3...Downward opening, 3
A... Flow tube, 4... Flue, 10... Inclined supply tube, 13... Melt processed material receiving surface, 14... Extrusion tool, 14a... Extrusion surface, 19a... Melted processed material receiving port.

Claims (1)

[Scope of utility model registration request] Secondary combustion chamber B is located below the downward opening 3 of the melting furnace A.
are connected in series, and a downstream cylinder 3A for discharging the melted product and high-temperature exhaust gas is installed in the secondary combustion chamber B,
The structure is such that the molten material from the opening 3 is supplied to a direct water-cooled cooling device C disposed below via the flow tube 3A, and the high-temperature exhaust gas from the opening 3 is supplied to the secondary combustion chamber B. It is an incinerator and melting furnace configured to discharge through a flue 4 that is connected to a pipe, and at the lower end of the downflow tube 3A, from a position below the downflow tube 3A to the reception port 19a of the molten processed material of the cooling device C, Inclined supply cylinders 10 each having a molten material receiving surface 13 that descends toward the cooling device C side are arranged in series to configure the entire flow path of the molten material into a curved path. An extrusion tool 14 is configured such that at least the molten product receiving surface 13 is of an indirect cooling type, and is slidable along the molten product receiving surface 13, and the extrusion surface 14a thereof is configured of an indirect cooling type. Further, the length of the inclined supply tube 10 in the direction of transporting the melted material is set such that the opening of the downstream tube 3A to the secondary combustion chamber B in the flow direction of the melted material within the inclined supply tube 10. An extension line of an imaginary line segment near, and
The incinerator and melting furnace is set to have a length sufficient to position the melt receiving port 19a of the cooling device C on the downstream side in the flow direction.