JPS6089613A - Removing method of ash in circular agitating incinerator - Google Patents

Abstract

PURPOSE:To enable discharge of only completely-burnt ash even if an object to be incinerated enters a discharge port as it remains to be in an incomplete combustion condition, by a method wherein an ash discharging port forms an ash reservoir, and ash, entering the discharge port, is reserved therein temporarily. CONSTITUTION:The upper open end of an ash reservoir 12 is open approximately in the same level as that of the upper surface of a sand layer S to form a discharge port 5, and an openable cover 13 is attached to the bottom. The openable cover 13 is normally closed, and when ash is stored in the ash reservoir 12, the openable cover is opened to discharge the ash, and thereafter, the cover is closed immediately. One example is described by way of example in which the cover is pivotally attached to a pin 14 and operation of the cover is effected by means of an air cylinder 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for discharging ash in a circular stirring incinerator;
In particular, it is characterized by providing an ash discharge port near the center of the furnace (this discharge port is opened and closed intermittently to suppress the discharge of unburned materials).

When incinerating material to be incinerated, it is desirable to burn the entire material to be incinerated evenly in order to increase incineration efficiency or to suppress local temperature rise. In particular, in incinerators for incinerating powdery materials such as sludge, it is necessary to uniformly apply air to the entire material to ensure stable combustion. In view of these points, the present inventor has previously invented a vertical circular stirring incinerator and has already filed an application for the same.

FIG. 1 shows the above-mentioned circular stirring incinerator, and the reference numeral 1 in the figure is the circular incinerator body. An exhaust port 2 is formed at the top of the incinerator body 1, and sand S is spread to an appropriate thickness on the bottom 6 of the incinerator, and a stirring device is provided on top of the sand S. A feeder 4 for introducing the material to be incinerated is attached, and an ash outlet 5 is attached near the center of the bottom of the furnace. The stirring device stirs the material to be incinerated 3 that has been put into the furnace to prevent it from clumping together and to improve contact with air so that the entire material is evenly combusted. Two or more stirring blades 8 are mounted radially on the top of the stirring blade 8, and the stirring blades 8 are further provided with a number of stirring hands 9 projecting downward. Needless to say, the stirring hand 9 is used to stir the materials to be incinerated deposited on the sand layer S, so its lower end reaches near the top surface of the sand layer S, and the rotating shaft 7, stirring blades 8 and The stirring hands 9 are all hollow bodies and are electrically connected to each other.A blower 10 is connected to the rotating shaft 7, and the stirring hands 9 are provided with a large number of blowholes 1.
1 is perforated, from which air is blown out and sprayed directly onto the materials to be incinerated.

By the way, as mentioned above, the stirring hand 9 has the function of stirring the material to be incinerated and at the same time leveling it. Therefore, the material to be incinerated that is put into the incinerator main body 1 is spread throughout the inside of the incinerator. More specifically, the material to be incinerated gradually moves to the center in a spiral manner, during which time it burns and becomes ash, which eventually enters the ash outlet 5 and is discharged outside the furnace.

By the way, in order to operate this incinerator in a steady state,
The material to be incinerated placed in the furnace must remain there for a certain period of time and be discharged from the furnace after being completely combusted.

However, since the stirring device does not have the function of transporting the materials to be incinerated sequentially, the materials to be incinerated remain macroscopically for a certain period of time.
Due to differences in residence time between individual particles, some particles reach the outlet 5 before combustion is complete, and some particles are blown away by the air ejected from the fumarole hole 1 and reach the outlet 5. Some things get into it.

This causes a problem in that incompletely burned materials are mixed with the ash and discharged outside the furnace.

The present invention solves the above-mentioned problems, and allows the material to be incinerated that has entered the outlet 5 in an incompletely combusted state to temporarily stay there, and then discharges it out of the furnace.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments.

In the figure, 1 is the incinerator main body, 5 is the ash outlet, 6 is the bottom of the furnace,
7 is a rotating shaft, 8 is a stirring blade, and 9 is a stirring hand, which are the same as the conventional one shown in FIG.

Reference numeral 12 denotes an ash basin, and the opening end of the upper surface is opened at the same height as the upper surface of the sand layer S, and serves as an outlet 5.
Further, an opening/closing lid 13 is attached to the bottom surface. This opening/closing lid 13 is normally closed, and when ash accumulates in the ash basin 12, it is opened to release the ash and then immediately closed. At the same time, the opening and closing operations are performed by the air cylinder 15.

As described in detail above, in the present invention, the ash outlet is used as an ash reservoir, and the ash that has entered the outlet is temporarily stored therein. Therefore, even if the material to be incinerated enters the takeout D5 in a state of incomplete combustion, it will be stored in the ash basin 12 and temporarily stagnate, where it will be burned and turned into ashes, and as a result, it will not be completely burned out of the furnace. Only the ash left behind will be disposed of.

Note that the opening/closing lid 13 does not need to be completely sealed.

With an appropriate amount of ash remaining in the ash sump 12, open the lid 13 slightly to discharge an amount of ash commensurate with the amount of ash newly entering the ash sump j2.
One method is to allow the ash inside to stay for a certain period of time.

However, in this case, although the amount of ash that enters the ash sump 12 is constant, since this ash also contains clinker and other solids, it is not possible to keep the amount of ash discharged constant. Since the outlet is blocked and the amount of accumulated ash gradually increases, it becomes necessary to open the lid 13 from time to time to discharge this ash.

There is no need to strictly define when to open the opening/closing lid 13. For example, an increase in the amount of ash in the ash basin 12 is detected and the detection is performed when this reaches a certain amount, or a timer is used to open and close the ash basin at regular intervals.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional circular stirring incinerator, FIG. 2 is a partially cutaway longitudinal sectional view showing an embodiment of the present invention, and FIG. 3 is a plan view showing the main parts of the same. 12... Ash reservoir 13... Open/close Lid 14...
・Pin 15...Air cylinder patent applicant Okawara Seisakusho Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] An input feeder is attached to the side wall of the vertical circular incinerator body, a sand layer is formed at the bottom of the incinerator, a rotating shaft is erected in the center of the incinerator, and two or more stirring blades are attached radially to the top of the rotating shaft. Furthermore, in a circular stirring incinerator in which the stirring blades are provided with a number of stirring hands whose lower ends reach near the sand layer, an ash basin is installed near the center of the furnace, and its open end is opened at a height near the top surface of the sand layer. This is used as an ash outlet, and an opening/closing lid is attached to the bottom of the ash basin, so that the ash that has entered the outlet is temporarily accumulated in the ash basin and then discharged. Method