JPH0560316A - Vertical incinerator - Google Patents

Abstract

PURPOSE:To shorten the interruption time period of incineration operation of solid refuse to increase the efficiency of incineration operation, efficiently perform after-burning and prevent unburnt and incomplete-combustion matters from sticking and piling on a movable bottom cover which forms the hearth of an incineration space. CONSTITUTION:An after-burning chamber 10 is provided under an incinerator main body 2 and an ash collecting chamber 15 is located under the after- combustion chamber 10. First, the bottom of an incineration space 2b is closed by a movable bottom cover 8A to form a hearth, and mixed solid refuse 6 is fed by a feeder 1 to burn the solid refuse to burned matters 5. Next, the movable bottom cover 8A is moved inside the after-burning chamber 10 and the incineration space 2b is closed by the other movable bottom cover 8B to perform incineration operation. Hot air is supplied into the after-burning chamber 10 as shown by an arrow D to further burn unburnt and incomplete- combustion matters contained in the burnt matter 5 and also to burn sticking matters 5a on the surface 13 of the movable bottom cover 8A to ash.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical incinerator for incinerating ash-rich solid waste such as miscellaneous solid waste in nuclear facilities.

[0002]

2. Description of the Related Art In nuclear power plants and the like, a large amount of radioactive miscellaneous solid waste containing a large amount of ash, such as vinyl chloride sheet, gum tape, and neoprene gloves, is generated. Such radioactive solid waste is incinerated and stored in drum cans or the like after incineration in order to reduce the volume of the waste as much as possible.

FIG. 3 is a schematic partial sectional view showing a vertical incinerator for incinerating such radioactive miscellaneous solid waste. A charging machine 1 is installed on the upper side of the vertically long incinerator body 2, a combustion exhaust gas discharge port 7 is provided on an upper side wall of the incinerator body 2, and a lower side wall of the incinerator body 2 is provided for combustion. An air supply port 3 for supplying the air and a hot air supply port 4 for supplying the hot air for raising the temperature of the furnace body are provided. A movable bottom lid 14 is fixed to the bottom of the incineration space 2b, and the bottom lid 14 forms a furnace bottom.

During the incineration work, after preheating the inside of the incinerator body 2, the combustible miscellaneous solid waste 6 is charged by the charging machine 1 into the incineration space 2b from the charging port 2a. This solid waste 6
Is ignited and is incinerated mainly near the bottom of the incineration space 2b. At this time, air is supplied from the air supply port 3 as shown by arrow A or hot air is supplied from the hot air supply port 4 as shown by arrow B. As a result, the miscellaneous solid waste 6 is incinerated and converted into the incinerated material 5 and deposited on the movable bottom lid 14. The exhaust gas generated by the incineration is discharged from the discharge port 7 to the outside of the furnace as indicated by arrow C.

The incinerator 5 deposited on the furnace bottom here is not completely incinerated and contains a considerable amount of unburned portion. Further, as the amount of the incinerated matter 5 accumulated increases, it becomes difficult for the air to come into contact with the unburned matter, so that the combustion efficiency is greatly reduced. Thus, for example, after incineration operation for 1 day, the incineration material 5 is burned for about 1 hour to promote its ashing and its volume is reduced, and then the movable bottom lid 14 is opened to remove the ash. Drop to 15. Then, after the ash is left to cool, it is filled into the drum can 16.

[0006]

However, in the incinerator as described above, the temperature near the bottom of the furnace is maintained at a high temperature of, for example, about 900 ° C. during the incineration process, but the temperature near the bottom of the furnace is maintained at 200 ° C. during the afterburning. Since the temperature drops to about 300 ° C, it is necessary to repeat such a temperature increasing / decreasing cycle in the incineration space 2b. However, once the temperature near the bottom of the furnace is lowered,
Next, it takes a considerable time to raise the temperature in the incineration space 2b again to a high temperature suitable for incineration,
Very uneconomical. On the other hand, if the incineration operation is continued for a long period of time, for example, 5 hours or more, the amount of the incineration material 5 deposited becomes very large, the combustion efficiency is greatly reduced, the unburned portion becomes very large, and the afterburning takes a long time. As a result, it becomes difficult to reduce the ash volume. In addition, a movable bottom lid
Unburned materials such as tar and incompletely burned materials adhere to the surface of 14,
As it accumulates, surface deposits can become an obstacle when closing the furnace bottom with the movable bottom lid 14 during long-term use.

An object of the present invention is to maintain the combustion efficiency of the solid waste even if the incineration operation of the solid waste is continued for a long period of time, and to efficiently burn the incineration of the incinerator. An object of the present invention is to provide a vertical incinerator capable of preventing unburned substances and incompletely burned substances from sticking to and depositing on the movable bottom lid to be formed.

[0008]

The present invention is directed to a vertical incinerator body for incinerating solid waste to convert it into incineration material; charging the solid waste into the incineration space of the incinerator body. Machine; a plurality of movable bottom lids that alternately form the bottom of the incinerator space; and a vertical incinerator having an afterburning chamber provided below the incinerator space for burning the incineration. The solid waste is incinerated in a state where one movable bottom lid is arranged at the bottom of the incineration space to form the furnace bottom, and the movable bottom lid is moved into the afterburning chamber. A vertical incinerator configured to be moved so as to drop the incinerator into the afterburning chamber and arrange the other movable bottom lid at the bottom of the incineration space to form the furnace bottom. It is related.

[0009]

1 is a schematic partial sectional view showing a vertical incinerator according to an embodiment of the present invention. The same functional members as those of the vertical incinerator shown in FIG. 3 are designated by the same reference numerals, and the description thereof may be omitted.

In this vertical incinerator, an afterburning chamber 10 is provided below the vertically long incinerator body 2. A pair of movable bottom lids 8A and 8B are housed in the afterburning chamber 10, and the pair of movable bottom lids 8A and 8B alternately form the furnace bottom of the incineration space 2b. A lower part of the afterburning chamber 10 is closed by a movable bottom cover 14, and an ash storage chamber 15 is provided below the movable bottom cover 14. A hot air supply port 11 and a gas discharge port 12 are provided on the side wall of the afterburning chamber 10. A ring-shaped flange 9 is provided on the peripheral surface of each of the movable bottom lids 8A and 8B, and the flange 9 comes into contact with the lowermost end of the incinerator body 2 directly or via a packing.

Next, the operating procedure of the vertical incinerator of this embodiment will be described. The bag-shaped miscellaneous solid waste 6 is charged from the charging machine 1 into the incineration space 2b through the charging port 2a. Space for incineration
Combustion air is supplied as indicated by arrow A or hot air is supplied as indicated by arrow B to the bottom of 2b. The miscellaneous solid waste 6 is ignited, incinerated to be converted into the incinerated matter 5, and the exhaust gas generated by combustion is discharged from the discharge port 7 to the outside of the furnace as shown by an arrow C. The exhaust gas discharged as indicated by arrow C is passed through a ceramic filter to remove dust, and the exhaust gas after dust removal is passed through a high performance particulate filter to remove dust again. Then, the exhaust gas is discharged into the atmosphere by an exhaust gas blower.

At the bottom of the incineration space 2b, first one movable bottom lid 8A is arranged, and the furnace bottom is formed by the movable bottom lid 8A. When the above incineration treatment is continuously performed for a certain period of time, for example, about 3 hours, a considerable amount of incinerated matter 5 is left on the surface 13 of the movable bottom lid 8A.
Deposits, and some unburned materials and incompletely burned materials are present on the surface.
Stick to 13. Here, one movable bottom lid 8A is attached to the afterburning chamber 10
Then, the incineration material 5 is dropped into the afterburning chamber 10. Next, the bottom of the incinerator body 2 is closed by the other movable bottom lid 8B to form the furnace bottom, and the state shown in FIG. 1 is obtained.

The other movable bottom lid 8B is provided at the bottom of the incineration space 2b.
The above incineration process is continued for a certain period of time again in the state of being arranged. As a result, the incineration material 5 is deposited on the surface 13 of the movable bottom lid 8B. During this time, the arrow D from the hot air supply port 11
Hot air (for example, about 500 ° C) is supplied into the afterburning chamber 10 to further burn the unburned portion of the incineration material 5 accumulated in the afterburning chamber 10 to promote its ashing and incineration. Reduce the volume of the object 5. Along with this, the adhered matter 5a fixed to the surface 13 of the one movable bottom lid 8A is further burned, ashed, and dropped to the bottom of the afterburning chamber 10. Then, the movable bottom cover 14 is opened, and the ash after the residual combustion is dropped into the ash storage chamber 15, where it is cooled, and then the drum can.
Housed in 16.

According to such a vertical incinerator, since the incinerator 5 is burnt in the afterburning chamber 10, the temperature inside the incinerator main body 2 can be maintained at a high temperature, and therefore the interruption time of the incineration process is short. Thus, the incineration operation can be started immediately. For this reason,
The efficiency of the incineration operation of the incinerator body 2 is greatly improved. Moreover, since the incineration material 5 deposited on the bottom of the incineration space 2b is dropped into the afterburning chamber 10 every predetermined time, it is possible to prevent the combustion efficiency from decreasing due to an increase in the amount of deposition.

Further, in the afterburning chamber 10, a movable bottom cover 8A is provided.
(Or 8B) The adhered matter 5a adhered to the surface 13 is also burnt and ashed, so that the adhered matter is adhered also when the bottom of the incineration space 2b is closed with this movable bottom lid 8A (or 8B). Does not get in the way. Further, when the movable bottom lids 8A and 8B are grid-like ones having a large number of slits, the hot air supplied into the afterburning chamber 10 as shown by an arrow D is
Furthermore, through the slits of the movable bottom lids 8A and 8B, the incineration space 2b
Since it blows out toward the bottom of the surface of the incineration space 2b
It is possible to further incinerate unburned substances and incompletely burned substances that are accumulated and fixed around 13 at the stage of incineration.

FIG. 2 is a schematic view showing an example of a mechanism suitable for moving the movable bottom lids 8A and 8B in the afterburning chamber 10.
The arm 18 is fixed to the movable bottom cover 8A (8B).
Are fixed to the rotary shaft 23. Further, a substantially fan-shaped arm 19 is fixed to the rotary shaft 23, and an end portion of the arm 19 is connected to a piston 21 of a cylinder 22 via a metal fitting 20. When the piston 21 moves to the left and right in FIG. 2, the arm 19 and the rotary shaft 23 rotate, and the arm 18 and the movable bottom lid 8A (8B) follow the rotation.

The vertical incinerator according to the present invention is used for the incineration of miscellaneous solid waste discharged from facilities handling radioactive materials such as nuclear power plants, as well as solid waste discharged from facilities handling toxic chemical substances, toxic gases, toxic microorganisms, etc. It can also be applied to the incineration of materials.

[0018]

According to the vertical incinerator according to the present invention, since the incinerated matter is burnt in the afterburning chamber provided below the incinerator space, the afterburning is performed in the incinerator body. Unlike the furnace, the temperature of the incineration space can be maintained at a high temperature, and therefore the incineration process can be started quickly and the incineration operation can be started quickly, so that the efficiency of the incineration operation in the incinerator main body is greatly improved.

Moreover, the movable bottom lid is moved into the afterburning chamber to drop the incinerated material from the incineration space into the afterburning chamber, and another movable bottom lid is arranged at the bottom of the incineration space to set the furnace. Since the bottom is formed, by repeating this, it is also possible to prevent a decrease in combustion efficiency due to an increase in the amount of incinerated material deposited.

Further, since the movable bottom lid is moved into the afterburning chamber to promote the combustion of the unburned portion and the incompletely burned portion in the incinerated material in the afterburning chamber, it is fixed to the surface of the movable bottom lid. At the same time, the adhered substances are also burned and ashed. Therefore, when the movable bottom lid again closes the bottom of the incineration space, the adhered matter on the surface does not interfere.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view showing a vertical incinerator according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an example of a mechanism suitable for moving a movable bottom cover.

FIG. 3 is a schematic partial cross-sectional view showing a vertical incinerator according to a conventional example.

[Explanation of symbols]

 1 Injector 2 Incinerator body 2b Incinerator space 5 Incinerator 6 Miscellaneous solid waste 8A, 8B Movable bottom lid 10 Afterburn chamber 11 Hot air supply port 13 Surface of movable bottom lid 15 Ash pool chamber

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[Procedure amendment]

[Submission date] September 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (1)

1. A vertical incinerator body for incinerating solid waste to convert it into incineration material; a charging machine for loading the solid waste into the incinerator space of the incinerator body; a furnace for the incinerator space. A vertical incinerator having a plurality of movable bottom lids alternately forming bottoms; and an afterburning chamber provided below the incineration space to burn the incinerated material afterburning. Incinerating the solid waste with one movable bottom lid placed at the bottom to form the furnace bottom,
The movable bottom lid is moved into the afterburning chamber to drop the incineration material into the afterburning chamber, and the other movable bottom lid is arranged at the bottom of the incineration space to close the furnace bottom. A vertical incinerator configured to be formed.