JPS61107011A - Method and apparatus for incinerating plastic waste material - Google Patents

Abstract

PURPOSE:To enable a uniform combustion of plastic waste material to be carried out in an entire incinerator by a method wherein the plastic waste material is ignited while being agitated together with several iron balls in the incinerator. CONSTITUTION:In order to incinerate and treat plastic waste material in an incinerator the plastic waste material P is fed into a rotary incinerator A at the inlet port 1, a flame of a burner 3 is blown from the inlet port 1 while the rotary incinerator A is rotated. At the secondary rotating incinerator B, air is injected from a pipe 11. Under a rotation of the rotary incinerator A, the plastic waste material P is agitat ed with the iron balls R, and the plastic waste material P is floated over the iron balls R due to its specific weight, so that the flame of the burner 3 is directly applied to the plastic waste material, the iron balls R are also exposed sometimes from the plastic waste material P under an agitation and exposed to the flame and both of them are heated. Further, the iron balls R are struck against the plastic waste material P to break the plastic into fine pieces, the balls are rotated on the inner circumferential surface of the rotary incinerator A or scrapes against the surface. Under such an activity of iron balls R, the molten material of plastic waste P does not adhered to the outer surfaces of the iron balls or the inner circumferential surface of the rotary incinerator A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of incinerating plastic waste and an incinerator used to carry out the method.

(Prior art) Conventionally, when disposing of plastic waste by incineration, the plastic waste placed in an incinerator is heated and combusted with a burner, and after burning, the burner is turned off and heated air is injected to continue combustion. The embers were scraped out and thrown away.

(Problem to be solved by the invention) However, since plastic burns after going through a melting stage, in places where it is relatively easy to cool and where it is difficult to burn even in the furnace.
Clinker is generated by solidifying the melted plastic snacks. This clinker can be combusted by re-igniting the burner, but the combustion of the -11° talin force takes time and poses a problem in terms of energy saving. In addition, the heated air blower (1) is installed at the bottom of the furnace because it is necessary to distribute air to the plastic, which causes clogging with melted plastic and prevents combustion. There were problems such as the generation area expanding further and causing a state in which combustion was impossible.

(Means for Solving the Problems) The present invention aims to solve the above problems. In other words, the method of this invention burns plastic waste while stirring it together with a large number of iron balls in a furnace.By doing this, the plastic waste is crushed into fine pieces by the iron balls, and on average, the plastic waste is crushed by the iron balls. To receive heat, plastic waste is burned on average throughout the furnace. Note that the second stirring can be performed by rotating or shaking the furnace.

In addition, the device of this invention consists of a rotary furnace containing a large number of iron balls and a secondary combustion furnace connected to the outlet of the rotary furnace, and the lower edge of the outlet of the converter is formed lower than the lower edge of the inlet. When constructing a plastic incinerator, it is possible not only to implement the above method, but also to completely burn the plastic so that it does not become a pollution problem, and also to transfer the plastic scum to the rotation of the rotary furnace. ) Gradually drains and torrents.

(Example) The drawing shows an example of this invention.
The burner 3 is installed at the inlet 1 of the rotary furnace A so as to be removable, and the secondary combustion furnace B is connected to the outlet 2. The diameter of the outlet 2 is made smaller toward the end, and the inlet 1 is opened at the front end, and the outlet 2 is opened at the rear end. L is lower than the position I-2 of the lower edge of the inlet 1, and annular rails 7.7 are provided protruding from the outer peripheral surface of both front and rear ends of the body 4. In addition, a large number of iron balls R are placed inside, and one iron ball is punched out at the rear end of the body (7L).
8 is provided, and the extraction hole 8 is filled with a plug 9.

In addition, the secondary combustion furnace "3" connected to the rotary furnace A is flue-shaped, with a chimney 10 connected to the tip and a chimney 10 connected to the base end.
□ indicates that a pipe 11 for blowing air into the incompletely combusted gas from the rotary furnace A is inserted, and the tip of the pipe 11 is bent toward the chimney 10. In addition, a discharge port 14 for the slag 13 is provided by cutting out the lower edge of the cap 12, and a barrier 27 is provided at the rear of the discharge port 14 to stop the movement of the slag 3 overflowing from the rotary furnace A. 29 is attached so as to be openable and closable, and 30 is a container for storing the cinders 13.

Regarding the support device for the converter A, a movable table 17 is provided on the base 16 so as to be tiltable, and a pair of rollers 18 for receiving the rails 7 of the rotary furnace A are provided on the movable table 17, one pair on the front and one on the front side. 18 is supported by a bracket 19, and the edge of the bracket 19 serves as an id to prevent the rail 7 from coming off.A motor 20 is provided at the rear end of the shaft 15 of one roller 18.

Regarding the tilting VC position of the movable base 17, the branches 2], 21 are attached to the rear end of the base 16, and the arms 22., 21 are attached to the rear end of the movable base 1f.
A pair of arms 22 and 22 are provided in a protruding manner, and an arm 22.22 is pivotally attached to the tip of the support column 3f3, and its pivot shaft 23 serves as an inclined fulcrum of the rotary furnace A. In addition, a rotary furnace A is mounted on the base 16.
A pair of cylinders 24 and 24 to be tilted are fixed rotatably.
1, and the receiving part 4 of the cylinder 24.24 is mounted on the movable base 17.
The receiving member 25 is formed into a case shape, and the piston rods 26, 26 of the cylinders 24, 24 are rotatably fixed to the upper end of the receiving member 25.

When plastic waste is incinerated in the incinerator described in Section 2, plastic waste P is put into rotary furnace A from inlet 1, and while rotary furnace A is rotated = 4-, the flame of burner 3 is In the secondary combustion furnace B, air is injected through the pipe 11.

Then, due to the rotation of rotary furnace A, plastic waste P
is stirred with the iron ball R, but due to its specific gravity, the plastic waste P floats above the iron ball R, so it is directly exposed to the flame of the burner 3, and the iron ball L (also stirred): plastic waste P is sometimes exposed and exposed to the flame, so both are heated.Moreover, the iron ball R hits the plastic waste P and breaks it into pieces, and also rotates on the inner peripheral surface of the rotary furnace A. The melted plastic waste P does not adhere to the outer surface of the iron ball R or the inner peripheral surface of the rotary furnace A due to such activity of the iron ball R.

In addition, since the flame of burner 3 is directed toward the outlet 2 side, air is sucked into the rotary furnace A from the inlet 1 due to its momentum.
In the secondary combustion furnace B, air is injected from the pipe 11 toward the chimney 10 and the secondary combustion furnace B becomes under negative pressure, so that air is also drawn into the rotary furnace A from the inlet 1.

The injection port of pipe 11 is equipped with a propeller.
The air is stirred and injected into stages.M↑:
After the plastic waste P is forcibly combusted in the burner 3 with the complete combustion gas being completely combusted, the combustion power is When it becomes quite strong, turn off the burner 3, pull out the inlet 1, let the combustion heat burn the plastic waste P, and add the fuel amount little by little to the population 1. Then, the inside will be stirred. As a result, the additional amount gradually advances toward the outlet 2, diffuses into the furnace, and burns while being equalized.

When the slag gradually accumulates in the furnace due to the addition and combustion of the plastic waste P, it overflows from the outlet 2 into the secondary combustion furnace B and is stopped by the barrier 27 therein. , after burning all the plastic waste remaining in the rotary furnace A, open stage 29 of the discharge r-1171. , 2-J: If the rotary furnace A is kept rotating in this way, the slag will be discharged until it reaches the height of the lower edge of the outlet 2, since the slag will be at an average height due to stirring. When the discharge to that extent is finished, close the discharge port 14 again with the lid 2.
9, and plastic waste P is newly introduced through the inlet 1 and burned. In this case, burner 3 is reignited if necessary.

If you want to discharge a larger amount of slag, pull the rotary furnace A away from the secondary combustion furnace B, as shown in Figure 4.
By activating the shilling 24, the rotary furnace A is rotated with the outlet 2 tilted downward. Therefore, at least one of the rotary furnace A and the secondary combustion furnace B is made movable.

Discharge of the slag 13 will be carried out using one of the methods described in 2. However, it is better to discharge the slag 13 with the secondary combustion furnace B connected, as this will reduce heat radiation during discharge and prevent the inside of the furnace from cooling down. This is also advantageous because it can prevent the combustion gas of plastic waste from being exhausted into the factory.

However, since the pongee 23 that serves as the fulcrum for tilting the rotary furnace A is located near the outlet 2 at the rear end, and even when the rotary furnace A is tilted, the position of the outlet 2 does not change much. Even when discharging the slag 1:], it is possible to do something like 2, which greatly reduces the deviation of the outlet 2 from the population 12 of the secondary combustion furnace B.

(Effects of the Invention) As explained above, according to the method and apparatus of this invention, plastic waste is stirred together with a large number of iron balls and then burned, and the plastic waste is crushed into small pieces by the iron balls. , and because it is heated by the iron ball,
Since combustion is carried out very well and the temperature inside the furnace is evened out, combustion is carried out evenly, and the generation of talin force can be reliably prevented. In addition, the cinders are easily disposed of because they become powdery.

Furthermore, according to the device of this invention, a secondary combustion furnace is connected to the outlet of the rotary furnace to burn plastic waste.
The incomplete combustion gas generated in the rotary furnace can be completely combusted and released into the flame, and the lower edge of the outlet of the rotary furnace is formed lower than the lower edge of the inlet, so slag can be discharged without overturning the rotary furnace. .

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[Brief explanation of drawings]

The drawings show an embodiment of the device according to the invention, with FIG. 1 being a vertical sectional view of the main parts of the device seen from the side, and FIG. 2 being a side view of the device.
FIG. 3 is a rear view of the rotary furnace, and FIG. 4 is a side view showing the tilting state of the rotary furnace. A... Rotary furnace B... Secondary combustion furnace P... Plastic waste R... Iron ball 1... Inlet 2... Outlet 3... Burner 10... Chimney 1
2...Population 14...Emission low 10=

Claims (1)

[Claims] 1) A method for incinerating plastic waste, which comprises burning the plastic waste in a furnace while stirring the plastic waste together with a large number of iron balls. 2) Incineration of plastic waste consisting of a rotary furnace containing a large number of iron balls and a secondary combustion furnace connected to the outlet of the rotary furnace, characterized in that the lower edge of the outlet of the rotary furnace is formed lower than the lower edge of the inlet. Device.