JPS62108918A - Burning and melting device - Google Patents

Abstract

PURPOSE:To make it possible to easily and precisely carry out supply of a molten substance and stop thereof, to arbitrarily set the staying time within the furnace and complete to maintain the processing step in an airtight manner by providing a furnace body provided with a molten substance supply port at a position eccentric from a center axis in a swingable manner with respect to a hood fixed at the side of the molten substance supply port. CONSTITUTION:On the side wall of a furnace body 1 a molten substance supply port 16 to the central axis O-O of the burnace body 1. On another end, a charging port 13 for a material to be processed is provided. Then, the furnace body 1 is placed on a pair of rollers 7 provided with a machine base 30 by setting its longitudinal direction horizontally or inclining slightly. A gear 6 provided around the outer periphery of the furnace body 1 is engaged with a pinion 21 rotating by a motor 8 rotatable in both normal and reverse directions, provided on the machine base 30 separately, and the furnace body 1 is installed in a swingable manner. In this case, the movable range is set to that it is sufficient if the molten substance is picked up from the molten substance supply port provided at least in the furnace body, and its range is selected according to necessity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an incineration and melting apparatus for incinerating and melting organic substances, inorganic substances, metals, and the like.

[Prior art]

Conventionally, incineration and melting equipment for incinerating and melting organic matter, inorganic matter, metals, etc., has been used for example, metal melting furnaces, sewage sludge melting furnaces, incineration and melting treatment equipment for municipal waste and industrial waste, and radioactive waste generated from nuclear power plants, etc. There are incineration, melting and solidification processing equipment, etc.

This type of incineration melting device should have the following three points in particular.

+t) /'fjj It is necessary to be able to easily tap and stop tapping the melt, and to be able to arbitrarily set the residence time of the material to be treated in the furnace.

It is essential that hot melt can be tapped and stopped safely and easily, and it is also possible to tap or stop tapping at will without being restricted by the amount of melt in the furnace. It is important that by doing this, it is possible to set the heating time depending on the object to be processed, that is, the residence time of the object in the furnace.

(2) It is necessary to reliably remove the molten material from the furnace.

In particular, the tap hole must not be blocked by partial weathering of the molten material or by unmelted materials.

(3) It is desirable that the series of processing steps of incineration melting, tapping, and cooling of the material to be processed be completed in an airtight processing device.

In order to prevent the scattering of fumes, dust, etc. that are generated when the processed material becomes molten, and when there is a possibility that harmful substances contained in the processed material may migrate into the atmosphere. In order to prevent the harmful substances from scattering, it is necessary to make the processing equipment airtight.

Conventionally, there have been various types of devices of this type known as follows, but each of them has the following drawbacks.

(a) A method in which a tap is provided at the bottom of the heating chamber, and the tap is opened and closed using a slide gate, etc. to tap and stop the tap of the molten material.

This method has the disadvantage that the hot water outlet is easily clogged, and the slide gate etc. are subject to severe wear and tear, requiring frequent maintenance.

(b) A tap hole is provided on the side wall or bottom of the heating chamber, and the area near the tap hole is forcedly cooled to partially solidify the molten material, thereby closing the tap hole. A method of heating and remelting the solidified material near the tap.

This method has the disadvantage that a large amount of equipment is required for tapping and stopping the hot water, and the operation is also complicated.

(c) A method in which the molten material is taken out by overflowing from the overflow port provided on the side wall of the heating chamber.

This method tends to cause blockage of the overflow port, and in order to control the residence time of the material to be treated in the furnace, it is necessary to
The disadvantage is that the properties of the melt must be carefully controlled.

(d) Heating the workpiece placed in the container or mold;
A method in which it is melted and then cooled.

This method has the disadvantage that the container or mold directly receives high heat from the heating source or the molten material, so it is difficult to provide heat resistance and insulation for the container, and it is not suitable for continuous or semi-continuous processing.

(e) A method in which the surface layer of the object to be treated is heated and melted, and the molten material is allowed to fall under its own weight and taken out from the bottom of the heating chamber.

Since this method does not create a pool of molten material, the residence time of the material to be processed in the furnace is short, and the drawback is that the material to be processed tends to be insufficiently melted.

(F) A method in which the material to be processed is heated and melted in an open heating chamber, and then the heating chamber is tilted to take out the molten material inside.

This method allows you to arbitrarily set the residence time of the material to be processed in the furnace.
Although the molten material can be taken out reliably, it has the disadvantage that it is difficult to make it airtight during tapping, and it is not suitable for continuous or semi-continuous processing.

[Purpose of the invention]

The present invention eliminates the drawbacks of the conventional method, and enables easy and reliable tapping and stopping of the melted material in the incineration melting device, as well as the ability to arbitrarily set the residence time of the material to be treated in the furnace. The object of the present invention is to provide an incineration and melting device that can complete a series of processing steps while maintaining airtightness.

[Structure of the invention]

The incineration and melting apparatus of the present invention is constructed by providing a furnace body with a tap hole located at a position eccentric from the central axis so as to be swingable relative to a hood fixed to the tap hole side.

〔Example〕

The present invention will be described in detail below with reference to the drawings. Fig. 1 is an external view of an incineration and melting apparatus in Embodiment 1 of the present invention, and Fig. 2 is an enlarged side sectional view of the furnace body and hood shown in Fig. 1. , 3rd
The figure is a front sectional view of the furnace body in the direction 1-1 of FIG. 2.

First, as shown in Figures 1 and 2, this incineration and melting equipment consists of the main parts of a furnace body 1 and a hood 2.As shown in Figure 2, the hollow furnace body l is made of cylindrical metal. The inner wall of the furnace shell 10 is covered with a fireproof/insulating material 11,
Furthermore, the furnace body 1 can be forcedly cooled if necessary.

Air-cooling or water-cooling is used for this forced cooling method depending on the purpose, but the material to be treated contains substances that generate hydrogen chloride when incinerated, such as vinyl chloride, and this hydrogen chloride condenses. If the furnace shell 10 is likely to be corroded, the furnace shell temperature should be increased from 100 to 2
It is desirable to control the furnace shell temperature by air cooling so as to maintain the furnace shell temperature at 00°C or higher and at 300 to 400°C or lower so as not to reduce the mechanical strength of the furnace shell 10.

A tap hole 16 is provided on the side wall of the furnace body I at a position eccentric from the central axis 0-0 of the furnace body I, and a workpiece inlet 13 is provided at the other end.

Here, as a flue for introducing the gas generated in the furnace body 1 to the hood 2 side, the outlet 16 may also be used as a flue as shown in FIG. 3, but the embodiment shown in FIG. As shown in FIG. 2, a flue 25 may be provided concentrically with the central axis O-O in addition to the tap 16'.

Next, as shown in FIG. 1, the furnace body 1 is rotatably placed, for example, on a pair of rollers 7 provided on a machine stand 30 with the length direction horizontal or slightly inclined. A gear 6 provided on the outer periphery of the furnace body 1 is meshed with a pinion 21 which is rotated by a motor 8 separately provided on a machine base 30 and rotatable in both forward and reverse directions, so that the furnace body 1 is swingably provided. In this case, the movable range may be such that the molten material can be taken out at least from a tap provided in the furnace body, and the range may be selected as necessary.

In addition, as shown in FIG. 3, there is also a burner 20 for heating the object to be processed in the furnace body l, and a burner 20 for incinerating the object to be processed.
A secondary air inlet 23 is provided. In addition, burner 20
The secondary air inlet 23 may be provided on the side surface in the circumferential direction of the cylindrical furnace body 1 as shown in FIG. 3, or may be provided in the axial direction.

Furthermore, as shown in FIG. 2, the fixed type hood 2 has the inner wall of a metal shell 14 covered with a fireproof/insulating material 15. The connecting portions are fixed in a connected state so as not to restrict the flow, and the connecting portions are sealed to prevent gas generated within the furnace body 1 from leaking outside the furnace.

Also, in this hood 2, a burner 19 is installed at the outlet 1 of the furnace body l.
6, and a secondary air inlet 24 is also provided.

On the other hand, a flue 22 is provided in the upper part of the hood 2, and the gas generated within the furnace body 1 passes through the outlet (6) and is discharged to the outside of the apparatus through the flue 22.

Here, the gas passing through the flue is sent to other exhaust gas treatment equipment, but in order to burn the flammable gas and combustible dust that are generated when the material to be treated is incinerated, this hood 2 It is desirable that the combustion chamber be provided with the function of a secondary combustion chamber so that the generated gas is subjected to secondary combustion through auxiliary combustion by the burner 19 and then discharged to the outside of the apparatus.

The bottom of the hood 2 is provided with a spout 17 through which the melt passes, and this spout 17 is opened and closed by a sliding damper 18 made of a fireproof and heat insulating material.

Further, as shown in FIG. 1, a receiver 3 for receiving the melt can be installed facing the pouring port 17, and this receiver 3 can be installed by a known means such as a hydraulic jack. It is pushed up in the direction of the hood 2 and is brought into close contact with the hood 2 while facing the hot water inlet 17.

Here, when the molten material is cooled and solidified in the receiver 3, the receiver 3 may be used as in Example 1 above, and when the melt is cooled and solidified in the mold, the mold is In this case, water tanks are installed facing the respective hot water inlets 17.

In addition, as shown in FIG.
The third side is connected to the material supply device 4 to be treated so as not to restrict the rotation of the furnace body l.
A known method such as a screw feeder type or a bushing type is used.

Regarding the incineration and melting processing work in the incineration and melting apparatus of Example 1 having the above-described configuration, Section 4-4 shows each work state.
To explain with reference to FIGS. A to 4-D, first, the tap hole 16 is closed to the
The furnace body l is rotated by the reversible motor 8, and the hood 2
The receiver 3 is crimped onto the bottom of the container 3 using the method described above.

Next, the burner 20 is ignited, and the workpiece is transferred to the workpiece supply device 4.
The material to be treated is continuously or intermittently introduced into the furnace body 1 through the inlet 13 and incinerated and melted. The furnace body 1 is rotated in the opposite direction, and the object to be processed in the furnace body 1 is stirred.

Thereby, the object to be processed is not only heated uniformly, but also the oxygen necessary for incineration of the object to be processed is evenly distributed, so that the object can be completely incinerated.

In addition, since the melt M is stirred, it becomes uniform, and the melt M
The solidified material obtained by cooling and solidifying is also homogeneous.

Note that the gas generated in the furnace body 1 is discharged through the outlet 16 which also serves as a flue, or in the case of the second embodiment shown in FIG. 5, a separate flue 25.
However, if the gas contains flammable gas or dust, it is secondary combusted in the hood 2 by auxiliary combustion in the burner 19, and then passed through the flue 22 to other exhaust gas treatment equipment. sent to.

Next, after a predetermined heating time has elapsed, first open the slide type damper 18 at the bottom of the hood 2 and open the hot water outlet 17 toward the receiver 3, as shown in the hot water tapping state in Figure 4-B. .

At this time, since the receiver 3 is in close contact with the hot water inlet 17, the atmosphere inside the hood 2 is not exposed to the outside air.

Next, as shown in Fig. 4-B, the furnace body 1 is rotated and stopped so that the tap hole 16 is located below the liquid level of the molten material M in the furnace body 1, and the molten material M is removed from the tap hole. 16. The molten metal is introduced into the receiver 3 through the inlet 17, and at this time, the tapping speed is controlled by controlling the position where the outlet 16 touches the molten material M by controlling rotation and stopping of the furnace body 1.

Further, by heating the vicinity of the tap hole 16 of the furnace body 1 by the burners 19 of the two hoods, the tap hole 16 is prevented from being clogged due to decrease in viscosity or solidification of the molten material M.

After a predetermined amount of melt has been tapped, the furnace body 1 is rotated so that the tap hole 16 is at a position away from the liquid level of the molten material M, as shown in the stopped state of tapping in Figure 4-C. , stop the hot water supply.

After this, it is sufficient to repeat the incineration melting, tapping, and stopping of tapping.Also, when replacing the receiver 3, as shown in the state of replacing the receiver in Fig. 4-D, the sliding damper 18 After closing the hood 2 and isolating the atmosphere inside the hood 2 from outside air, the receiver 3 is replaced.

Next, FIG. 6 shows the incineration melting apparatus of Example 3,
The same parts as in Example 1 are indicated by the same part numbers, but the configuration differs from Example 1 in that the hood 2 connected to the furnace body 1 is connected to the incinerator 26 via the flue 33. In the incinerator 26, the combustible material to be treated is incinerated using high-temperature exhaust gas generated within the furnace body 1.

On the other hand, in the furnace body 1, incineration and melting of retardant and non-combustible materials are mainly performed, and although combustible materials can be incinerated at relatively low temperatures, it is necessary to increase the internal volume of the furnace. On the other hand, in order to incinerate and melt flame retardant and non-combustible materials, the internal volume of the furnace may be relatively small, but it is necessary to heat the furnace to a high temperature.

Therefore, the furnace body 1 incinerates and melts flame retardant and non-combustible materials at high temperature.
Incinerator 2 which has a large volume to collect the exhaust gas generated from this
6 and incinerate the combustible material there, efficient incineration and melting can be performed.

The incinerator 26 is provided with a material inlet 27, a flue 28, and an incineration ash outlet 31, as well as a burner 34 for auxiliary combustion and a secondary air inlet 29.

Incidentally, the incinerator 26 may be of a vertical fixed bed type as in the third embodiment, or may be of a known grate type ring type.

The incineration and melting process using the incineration and melting apparatus of Example 3 having the above configuration is performed as follows.

First, the combustible material to be treated is put into the incinerator 26 from the material input port 27 and heated by high-temperature gas generated in the furnace body 1 and introduced into the incinerator 26 through the flue 33. , will be incinerated.

When the temperature of the generated gas in the furnace body 1 is low, such as during startup, auxiliary combustion is performed by the burner 34 as necessary.

The incinerated ash accumulates at the bottom of the incinerator 26 and is removed from the incinerated ash outlet 31.
This is done through the damper 32.

The incombustible materials, noncombustible materials, and even the incinerated ash taken out from the incinerator 26 are put into the furnace body I, and are incinerated and melted in the same process as described in the first embodiment.

〔Effect of the invention〕

The incineration melting apparatus of the present invention described above has the following remarkable effects.

(1) The furnace body of the incineration and melting device of the present invention is provided with a tap outlet at a position eccentric from its central axis, and the furnace body is swingable, so the furnace body can be rotated and stopped. This has the effect of easily and safely dispensing the melt, stopping the dispensing, and controlling the dispensing speed.

(2) The residence time of the material to be treated in the furnace can be set arbitrarily because the melt can be tapped and stopped at will without being restricted by the amount of molten material in the furnace.

(3) As mentioned in (11) above, the tap is eccentric, so if you keep the tap facing upward and swing it, the melt will not spill out, and the melt will flow out from the tap to the hood side. You can easily release the water by simply pointing the tap downward.

(4) Since the furnace body can be freely swung, the material to be processed inside the furnace is well agitated, allowing for efficient heating.Furthermore, ventilation can be improved, so the material to be processed can be incinerated efficiently. can do well.

(5) Since the molten material can be stirred and mixed by the rocking of the furnace body,
This can accelerate the melting rate, make the melt uniform, and promote the formation of bubbles in the melt, making the solidified material obtained by cooling the melt homogeneous and dense. can do.

[Brief explanation of drawings]

FIG. 1 is an external side view of the incineration and melting apparatus in Example 1 of the present invention, FIG. 2 is an enlarged side sectional view of the furnace body and hood of FIG. 1, and FIG. 3 is a 1- A front cross-sectional view in one direction,
4-A, 4-B, 4-C, and 4-D are sectional views showing a series of states regarding the incineration and melting process of the incineration and melting apparatus of Example 1 in FIG. 5 is a front sectional view of a furnace body according to a second embodiment of the present invention, and FIG. 6 is a side sectional view of an incineration and melting apparatus according to a third embodiment of the present invention. 1...furnace body, 2...hood, 7...roller, 8...
... Motor, 16.16'... Tap, 21... Binion, M... Melt, 0-0... Central axis.

Claims (1)

[Claims] An incineration and melting device in which a furnace body with a tap hole located eccentrically from the central axis is swingable relative to a hood fixed to the tap hole side.