JPS627446B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an incinerator for municipal waste, etc.

In an incinerator for municipal waste, etc., as shown in Fig. 1, the waste put into an input hopper 2' is led to a dust supply chute 3' connected to the hopper, and is fed with dust by a dust supply pusher. It is fed into the furnace 5' through the port 4'. The inside of the furnace 5' is divided into a plurality of zones, such as a drying zone 5a', a combustion zone 5b', and a post-combustion zone 5c'. be done.

However, the municipal waste sent into the furnace 5' is a variety of miscellaneous items, and the quality of the waste varies considerably depending on the type and season (300Kcal/Kg - 1700Kcal/
Therefore, the combustion state in the furnace and the flame state change depending on the quality of the waste. For example, in the case of high-calorie, easily combustible waste, ignition and combustion occur in the dry zone near the dust inlet. There is a risk that the flame may penetrate into the dust supply chute or cause combustion within the chute. Therefore, when the quality of the waste is high in calories, ignition occurs in the dry zone.
It is desirable to suppress the degree of combustion, especially so that the flame does not go toward the dust inlet. Conversely, in the case of low calorie waste materials, it is better to spread the flame across the drying zone to promote drying and combustion.

In view of the above, the present invention makes it possible to adjust the state of the flame in the drying zone in the furnace, especially the extent to which the flame moves toward the dust inlet, depending on the quality of the waste to be incinerated, that is, the degree of combustion in the furnace. This is how it was done. That is, the present invention suspends a movable baffle, mainly made of refractory material, from the ceiling wall so as to be movable up and down at a position approximately midway between the dust inlet and the flue in the drying zone following the dust inlet in the furnace. The interior of the movable buttful is formed hollow, and a cooling medium inlet and outlet are provided to the hollow part so that a cooling medium such as air or water can be flowed. This makes it possible to control the direction of the flame depending on the quality of the waste, and adjust the drying and combustion conditions.Furthermore, the cooling effect of the air and water flowing inside the Batsuful makes it possible to control the direction of the flame depending on the quality of the waste. The purpose is to prevent the heat from overheating and utilize that heat.

Next, one embodiment of the present invention will be described based on FIGS. 2 to 4.

1 is the furnace body of the incinerator, 2 is the input hopper for objects to be incinerated such as garbage, 3 is the chute for dust supply, 4 is the dust supply port,
5a is the drying zone in the furnace 5, 5b is the combustion zone, 5c is the rostrum of each zone, 7a, 7b, and 7c are the ash chute provided below each of the drying, combustion, and post-combustion zones, and 8 is the water seal. type conveyor, 9 is a flue.

Reference numeral 10 denotes a movable buttress which is suspended from the top wall 11 at a position approximately midway in the feed direction between the dust inlet 4 and the flue in the drying zone 5a so as to be movable up and down by a suitable lifting means outside the furnace. The movable buttful 10 is mainly made of refractory material 12 such as firebrick or asbestos and is hollow inside, and the upper part of the movable buttful 10 is normally provided so as to penetrate through the ceiling wall part 11 and protrude outside the furnace. In the case of the figure, iron plates 14, 14 are stretched on both sides of a framework 13 made of shaped steel or the like to form a core body 15, and a large number of engagement protrusions 16 are protruded from the outside of the core body 15. A refractory material 12 is installed to a required thickness so as to embed the core body 15, and the interior formed by the core body 15 is formed hollow. A plurality of hanging rods 17 are fixedly installed on the upper part of the framework 13 of the core body 15, and each hanging rod 1
A screw is provided at the upper part of the movable baffle 10, and the threaded portion 17' is fastened to a beam 18 provided above the furnace with a nut 19, so that the movable baffle 10 is suspended from the beam 18. And said nut 1
The movable buttful 10 is moved up and down by the tightening/loosening operation 9, and this serves as a lifting means. As a means for raising and lowering the movable baffle 10, a mechanical means such as a winch of the beam 18 may be used to move the movable baffle 10 up and down. These elevating and lowering means can be provided so as to be operated manually according to the combustion state in the furnace, but they can be connected to a temperature sensor 20 installed at an appropriate place in the furnace to detect the combustion state based on the combustion temperature. It is desirable to provide automatic control of the lifting and lowering drive in accordance with the detection by the sensor 20.

Furthermore, in the case of the present invention, the movable buttful 10 has a core body 15 at an appropriate location such as an upper part that can protrude outside the furnace, and has a cooling medium inlet 22 and an outlet 23 to the hollow part 21.
A cooling medium such as air or water can be passed through. Reference numeral 24 indicates a communication hole within the hollow portion 21. In the case of an air cooling system, a blower 25 is connected to the inlet 22 as shown in the figure, and the outlet 2
3 is connected to an appropriate place in the combustion section of the furnace through a duct, for example, to the ash chute 7b of the combustion zone 5b, and
The cooling air passing through the movable buffle 10 can be used as combustion air, that is, the movable buffle 10 can be provided to be used as an air preheater for combustion. In addition, in the case of water cooling system, movable buttful 10
Provision may also be made to utilize heated cooling water by passing through the tube.

In addition to the embodiments described above, the present invention can be practiced by making various changes to, for example, the internal structure of the movable baffle, the elevating device, etc., without departing from the scope of the claims.

In the incinerator of the present invention configured as described above, the dust inlet 4 in the drying zone 5a and the smoke The movable buttful 10, which is suspended at an approximately intermediate position between the road 9 and the road 9, is moved up and down to adjust the degree (dimensions) of the hanging protrusion from the ceiling wall 11. By controlling the extent to which the dust flows toward the dust inlet 4, the combustion state within the furnace can be adjusted and maintained in a favorable manner.

That is, when the waste supplied into the furnace is of high calorie and highly combustible waste, the movable buttful 10
is lowered so that its lower end is close to the garbage surface, and the combustion flame centered on the combustion zone 5b is brought to the dry zone 5a.
In particular, it is sufficient to block the dust from moving toward the dust inlet 4 and direct it toward the flue 9. In this way, the area on the side of the combustion zone 5b from the movable buttful 10 of the drying zone 5a Even if it ignites and burns, the flame is blocked in the area on the side of the dust inlet 4, so ignition and combustion are suppressed. There is no risk that the dust will burst into flames or that the flames will penetrate into the dust supply chute 3, and of course there is no risk of combustion within the chute. If the quality of the waste is lower than the above, it is only necessary to raise the movable buttful 10 according to the degree. If the Batsuful 10 is raised to such an extent that there is little or no drooping protrusion, and the combustion flame is sufficiently spread throughout the dry zone 5a,
The drying of the garbage in the drying zone 5a is not inhibited at all, and a good combustion state can be maintained.

Furthermore, the movable buttful 9 is configured so that a cooling medium such as air or water can be flowed into the hollow part inside, so that the movable buttful is directly heated by the flame due to the cooling effect caused by the flow of air or water. It is possible to prevent overheating of itself, prevent damage to the hanging support member and the connecting portion with the lifting means due to overheating, and maintain the above-mentioned combustion effect favorably for a long period of time. Moreover, since the cooling air and water are heated by the flow through the movable buttful 10, this heated air or hot water can be used.
For example, by sending heated air into the combustion zone, it can be used as air for promoting combustion.

As described above, the present invention suspends the movable buttful in the drying zone near the dust inlet so that it can move up and down,
Since we have made it possible to control the extent to which the flame moves towards the dust inlet depending on the quality of the garbage supplied to the furnace, even if it is easily flammable and high-calorie garbage, it can be burned and incinerated without any problems. Of course, there is no problem in burning low-calorie waste, and it can handle a very wide range of waste types, maintain good combustion conditions, and eliminate all the drawbacks of conventional incinerators.

Further, in the case of the present invention, there is an advantage that the movable baffle can be used as an air preheater for combustion or as a hot water heat exchanger, for example, by utilizing the movable baffle cooling method.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing an outline of a conventional incinerator, Fig. 2 is a schematic sectional view of an incinerator showing an embodiment of the present invention, Fig. 3 is a vertical sectional front view of the main parts, and Fig. 4 is an enlarged sectional view along the line shown in the previous figure. 1...Furnace body, 2...Charging hopper, 3...Dust supply chute, 4...Dust supply port, 5...Furnace interior, 5a...
Dry zone, 5b... Combustion zone, 5c... Post-combustion zone, 1
0...Movable buttful, 11...Ceiling wall, 12...
Refractory material, 15... core body.

Claims (1)

[Claims] 1 In the drying zone following the dust inlet in the furnace, a movable buttful made mainly of refractory material is suspended from the ceiling wall so as to be able to move up and down, at a position approximately midway between the dust inlet and the flue. A Batsuful is an incinerator characterized by having a hollow interior and providing a cooling medium inlet and an outlet to the hollow part so that a cooling medium such as air or water can be flowed therethrough.