JP3477525B2 - Incinerator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for medical waste such as waste paper diapers, kitchen waste such as vegetable waste, self-combustible oil-containing sludge and other incineration treatments. It relates to an incinerator. 2. Description of the Related Art Conventionally, as this kind of incinerator, FIG.
As shown in the figure, the inlet (51), the auxiliary burner (52) and the combustion air nozzle (53) for the thing to be incinerated (called incineration) are provided on the peripheral wall, and the exhaust gas outlet (54) is Furnace body equipped with a bottom (55) at the bottom of the waste (called incineration)
(56), and a stirrer (58) arranged along the bottom wall of the furnace body (56), that is, above the fixed hearth (57). The stirrer (58) includes a vertical rotating shaft (59) provided through the fixed hearth (57), a horizontal rod (60) provided at an upper end of the rotating shaft (59), and a rod (60). ) Comprises a plurality of agitating blades (61) provided in a hanging manner, and a drive motor (62) provided at the lower end of the rotating shaft (59). [0003] In the incinerator of this structure, when the incinerated material is put into the fixed hearth (57) from the charging port (51), the incinerated material is broken by the stirring blades (61) of the stirring device (58). A new surface is exposed. By repeating this, a new surface of the incinerated material is sequentially exposed, and the generated incinerated material is gradually pushed toward the discharge port (55) by the stirring blade. [0004] However, in the structure in which the hearth (57) is a fixed bed as described above, medical waste such as waste paper diapers and kitchen waste such as vegetable waste are used. When wastes packed in a cardboard case or a polyethylene bag are thrown into the hearth through the inlet, the incinerated materials are hardly broken by the stirring blades (61) of the stirring device (58), and a new surface is not easily exposed. Therefore, it takes a long time to disintegrate the incinerated material, and the stirring cardboard case or polymer bag of the waste is caught on the stirring blade (61), which hinders the rotation of the stirring device (58), and as a result, combustion is impossible. It can even be. Further, the lower end of the stirring blade (61) and the rotary hearth (5
There is a considerable amount of clearance between 7), and the ash and other inorganic substances deposited in this clearance melt during high-temperature combustion to form clinkers, which hinder the rotation of the stirrer (58) and impede combustion. Becomes SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-described problems, and the burning portion of the incineration material easily collapses.
It is an object of the present invention to provide an incinerator capable of exposing a new surface, efficiently performing incineration of an incineration object, and preventing generation of clinker due to melting of ash and other inorganic substances. [0007] In order to achieve the above object,
For this purpose, the combustion apparatus according to the present invention is a Rostor made of a plurality of agitating blades provided in a hanging manner at the bottom of a furnace body having an inlet for incineration, an auxiliary burner, an exhaust gas outlet, and an outlet for incineration. A rotary hearth is provided, and a combustion burner and
The firing air nozzle is oriented so that it is off-center.
As a result, the combustion chamber above the rotary hearth in the furnace body
Incineration in which a swirling flow of flame is formed
In the apparatus, an air supply pipe along the rotating hearth is attached to the peripheral wall of the furnace body so as to be rotatable around the center line of the pipe, and crushed.
A plurality of crushing blades are fixed in the furnace of the blade cooling air supply pipe in a hanging manner, and are arranged at regular intervals in the length direction of the pipe.
And extends downward to near the rotary hearth.
Is hollow, and a plurality of crushing blade cooling air
It has a nozzle and air for cooling the crushing blades on the side of the peripheral wall of the furnace body.
A large diameter supply pipe is provided in a penetrating manner on the side of the peripheral wall of the furnace body.
Through the tube insertion tube and rotate in the circumferential direction with respect to the tube insertion tube
The air supply pipe for cooling the crushing blades is
So that it extends along and along the upper side, near the center of the combustion chamber
An air supply pipe is provided outside the furnace of the air supply pipe for cooling the crushing blades.
The crushing blade is suspended from the lower end of the arm.
Weight is provided outside the air supply pipe for cooling the crushing blades.
Air conduit connected to end via rotary joint
Waste with a high water content, such as waste paper diapers
Stuffed into a cardboard case etc. as incineration
When thrown into the rotary hearth through the inlet, the incinerated material
Both rotate slowly in the combustion chamber, and the combustion air is lost.
Is supplied to the incinerated material from both above and below the rotary hearth made of
The ash and other inorganic matter produced by
Rarely stays on the hearth and passes through a rostrole hearth.
Falling on the cold bottom wall, discharged from the furnace,
If the incineration rate is slow and the incineration is in a hard state,
The incinerated material hits the lower end of the crushing blade and
Push the crushing blades forward in the air supply pipe for cooling the crushing blades.
Rotate around the core wire and disintegrate the incinerated material as it is
After passing under the wings, the original weight and weight
Returning to the hanging state, the incinerated material is
Of fuel and air nozzle for combustion and multiple crushing
Formed from the air blown out from the blade cooling air nozzle.
Is gradually burned by the swirling flame,
Turn and hit the lower end of the crushing blade again to incinerate the incinerated material
However, when the upper part has advanced enough to be crushed
Indicates that the incinerated material hits the crushing blades and
Is disintegrated and a new surface is exposed,
Push the lower end forward in the rotation direction to cool the crushing blades
Around the center line of the air supply pipe for
The lower end of the root scraped the burning part of the incineration material backward
Later, the crushing blades return to their original drooping shape due to their own weight and weight.
Returning to the state, by repeating this, a new table of incineration
As the surface is exposed, the resulting incineration is rotated by Rostor
After falling on the low-temperature bottom wall through the hearth, air for cooling the crushing blades
Air for cooling the crushing blades always passes through the supply pipe.
The air for cooling the crushing blades accelerates the heat received by the crushing blades.
Suppress the temperature rise of the crushing blades
Promotes combustion of rejects, especially in the center of the combustion chamber
It is also characterized by being used to advance . Next, an embodiment of the present invention will be described.
Will be described with reference to the drawings. In FIG. 1, the combustion apparatus according to the present invention mainly comprises a furnace body (4) and a rotary hearth (6) arranged at the bottom of the furnace. The furnace body (4) is composed of a shell (26) made of a steel plate and a lining (27) of refractory material. The furnace body (4) has an inlet for incineration material (1) formed in the front of the peripheral wall, and a combustion burner (2) formed in the upper part of the peripheral wall.
And a combustion air nozzle (20) formed at the intermediate height of the peripheral wall
And an exhaust gas outlet (3) formed at the center of the top wall, and a discharge port (5) for incinerated material formed at the side of the bottom wall. The rotary hearth (6) is composed of a rostrum, that is, a grating, and its lower surface is supported by a frame (17). The frame (17) has a vertical rotating shaft (15) extending downward at the center thereof, and the rotating shaft (15) passes through a center hole of the bottom wall of the furnace body (4) via a sealing member (14). The lower end is connected to the drive shaft of the motor (16). Frame (17)
A plurality of ash scraping plates (12) are provided in a hanging manner on the lower surface. The ash scraping plate (12) removes ash and other inorganic substances falling on the bottom wall (18) of the furnace body (4) as described later,
With the rotation of (6), it is inclined with respect to the rotation direction so that it can be sequentially sent to the discharge port (5). [0010] The combustion burner (2) and the combustion air nozzle (20) are arranged on the peripheral wall of the furnace body (4) in a direction away from the center. Rotary hearth
(6) A swirling flow of the flame is formed in the upper combustion chamber (13). One air supply pipe is provided on the side of the peripheral wall of the furnace body (4).
(11) is rotatably mounted around the center line of the pipe. That is, the air supply pipe (11) is passed through a large-diameter pipe insertion tube (26) provided in a penetrating manner on the side of the peripheral wall of the furnace body (4),
It is rotatable in the circumferential direction with respect to the tube insertion tube (26). The air supply pipe (11) extends above and along the rotary hearth (6) to near the center of the combustion chamber (13). Air supply pipe (1
An arm (27) is fixed to the outside of the furnace of (1), and a weight for returning a crushing blade (9) described later to a hanging position is provided at a lower end of the arm (27).
(8) is provided. An air conduit (29) is connected to an outer end of the air supply pipe (11) via a rotary joint (28). The height of the tube insertion tube (26), that is, the crushing blade
The height of the air supply pipe (11) having (9) is preferably adjustable. A plurality of crushing blades (9) are fixed inside the furnace of the air supply pipe (11). These are located at regular intervals along the length of the tube and extend down to near the rotary hearth (6). Each crushing blade (9) is hollow and has a plurality of crushing blade cooling air nozzles (10) near the lower end. In a large-scale incinerator, another air supply pipe (11) having the crushing blades (9) having the above structure may be provided on the side of the peripheral wall opposite to the furnace body (4). is there. [0014] In the incinerator of the above construction, medical waste such as waste paper diapers, or waste having a high water content such as kitchen waste such as vegetable waste packed in a cardboard case or polyethylene bag is used as the incinerator. When thrown into the rotary hearth (6) from the inlet (1), the incinerated material rotates slowly in the combustion chamber (3) together with the hearth (6). The air for combustion is supplied to the incinerated material from both the upper and lower sides of the Rostor rotary hearth (6), so that the in contact with the incinerated material and the air are in good contact. Therefore, the incineration surface area of the incineration material increases, and the incineration speed increases. The ash and other inorganic substances generated by the incineration hardly stay on the high-temperature rotary hearth (6), but fall on the low-temperature bottom wall (18) through the Rostor rotary hearth (6). Therefore, there is no fear that ash and other inorganic substances are melted at the time of high-temperature combustion to generate clinker. The ash and other inorganic substances that have fallen on the bottom wall (18) are sequentially sent to the discharge port (5) by the ash scraper (12) as the rotary hearth (6) rotates, and are discharged from the furnace. You. When the incineration speed of the incinerated material is low and the incinerated material is in a hard state, as shown in FIGS. 2 (a) and 2 (b), the incinerated material (A) is connected to the crushing blade (9). It hits the lower end and pushes it forward in the direction of rotation to rotate the crushing blade (9) about the center line of the air supply pipe (11) as shown in FIG. 2 (c). Incineration
(A) passes under the crushing blade (9) in this state, and then returns to the original hanging state by its own weight and the weight (8) as shown in FIG. 2 (d). The incinerated material (A) is then used as a burner burner.
(2) is gradually burned by a spiral flame formed from the fuel jetted from the combustion air nozzle (20) and the air jetted from the plurality of crushing blade cooling air nozzles (10),
It rotates together with the hearth (6) and again hits the lower end of the crushing blade (9). If the incineration of the incinerated material (A) has progressed to such an extent that the upper part can be disintegrated, as shown in FIGS. 3 (a) and 3 (b), The burning portion (A1) on the upper part of the crushing blade (9) is crushed to expose a new surface, and the lower end of the crushing blade (9) is pushed forward in the rotating direction to push the crushing blade (9). Rotate around the center line of the air supply pipe (11).
Next, as shown in FIGS. 3 (c) and 3 (d), after the lower end of the crushing blade (9) scrapes the burning portion (A1) of the incinerated material (A) backward, the crushing blade (9) ) Returns to its original hanging state due to its own weight and weight (8). By repeating this process, a new surface of the incineration material is exposed, and the resulting incineration material falls on the low-temperature bottom wall (18) through the Rostor rotary hearth (6). The air supply pipe (11) always has a crushing blade cooling
Use air is passing through. The air for cooling the crushing blades quickly removes the heat received by the crushing blades (9) to suppress the temperature rise of the crushing blades (9), and as described above, combusts the incinerated materials, particularly the combustion chamber (13). ) Is also used to promote combustion in the central part. When 15 pieces of paper diapers containing water (320 g per sheet on average) were filled in a polyethylene bag, and the bag was incinerated at 850 ° C. in a combustion apparatus described in JP-B-54-42549. It took 25 minutes to incinerate almost completely, and unburned substances were found in the incinerated material. On the other hand, in the incinerator according to the present invention, it took only four minutes to completely incinerate the same material under the same conditions, and no unburned material remained. As described above, the incinerator according to the present invention has a plurality of agitators at the bottom of the furnace body provided with the inlet for the incinerated material, the auxiliary burner, the exhaust gas outlet, and the outlet for the incinerated material. A rotary hearth made of Rostor with blades hanging down is arranged, and the furnace body
Burner and combustion air nozzle are off center
Oriented within the furnace body
Swirl flow of flame is formed in the combustion chamber above the rotary hearth
In the incinerator, an air supply pipe along the rotary hearth is rotatably mounted on the peripheral wall of the furnace body around the center line of the pipe, and the air supply pipe for cooling the crushing blades is provided inside the furnace.
A plurality of crushing blades are fixed to the part in a hanging manner.
Are located at regular intervals in the length direction of the
Each crushing blade is hollow, near its lower end.
A plurality of crushing blade cooling air nozzles, and a peripheral wall of the furnace body
An air supply pipe for cooling the crushing blades is provided on the side of the peripheral wall of the furnace body.
Through a large-diameter pipe insertion tube
It is made rotatable in the circumferential direction with respect to the cylinder, and crushing blade cooling
The air supply pipe is located above the rotary hearth along the combustion chamber.
It is provided to extend near the center, and is used for cooling the crushing blades.
An arm is fixed outside the furnace of the gas supply pipe, and the lower end of the arm
Is provided with a weight that returns the crushing blades to the hanging position.
A rotary joint is provided at the outer end of the blade cooling air supply pipe.
Air pipes are connected through the
Waste with high water content in cardboard cases
And put it on the rotary hearth from the input port as incineration
Then, the incinerated material rotates slowly in the combustion chamber together with the hearth.
The combustion air is either above or below the Rostor rotary hearth.
Ash generated by incineration
Other minerals hardly stay on the hot rotary hearth,
After falling on the low-temperature bottom wall through the rostral hearth,
After being discharged from the furnace, the incineration rate of
If the slag is in a hard state, the incinerated material is the lower end of the crushing blade.
And push it forward in the direction of rotation to break the crushing blades
Rotate around the center line of the blade cooling air supply pipe to incinerate
After the object passes under the crushing blade in this form,
The weight and weight return to the original hanging state, and this incineration
Then, the fuel and the combustion air that erupted from the burner burner
Air nozzles and multiple air nozzles for cooling the crushing blades
With a swirling flame formed from the outgoing air
, And rotates with the hearth again to lower the bottom of the crushing blade
Incineration of the incinerated material, the upper part of which can be crushed
If it has progressed to the extent, the incinerated material hit the crushing blades
The upper burning part is disintegrated and a new surface is exposed
And push the lower end of the crushing blade forward in the rotation direction,
Turn the crushing blade around the center line of the air supply pipe for cooling the crushing blade.
Then, the lower end of the crushing blade is
After scraping the minutes backward, the crushing blades
The weight returns to the original hanging state.
The new surface of the incineration material is exposed and the resulting incineration
The rejected material falls on the cold bottom wall through the Rostor rotary hearth
The air supply pipe for cooling the crushing blades
Cooling air is passing through,
The heat received by the crushing blades is quickly taken away and the temperature of the crushing blades rises
Combustion of incinerated materials, especially in combustion chambers.
It has also been used to promote combustion in the center.
Characterized in that it is, according to the combustion apparatus of the present invention, since the rotary hearth is composed of grate, good contact state of the incinerated air, burning speed increases At the same time, the ash and other inorganic substances generated by incineration fall on the low-temperature bottom wall through the rostral hearth, and there is no danger of clinker generation due to the melting of the inorganic substances. Further, the peripheral wall of the furnace main body extends along the rotary hearth.
A crushing blade cooling air supply pipe is rotatably attached,
Since a plurality of crushing blades are fixed in a hanging manner to the crushing blade cooling air supply pipe, the incinerated material hits the crushing blades, the burning part is crushed and the new surface is exposed, and the incinerated material is Push the lower end of the crushing blade forward in the rotation direction, rotate the crushing blade around the center line of the air supply pipe for cooling the crushing blade , and then the lower end of the crushing blade moves the burning part of the incineration material backward. Scrape off. By repeating this, a new surface of the incineration material is sequentially exposed, incineration is promoted , and since each crushing blade is provided with a crushing blade cooling air nozzle, the air supply amount is increased. It is possible to promote incineration of the incineration, especially in the central part of the combustion chamber. Therefore, according to the combustion apparatus of the present invention,
For example, there is an effect that even incinerated materials having a high water content such as medical waste such as waste paper diapers and kitchen waste such as vegetable waste can be incinerated without any trouble.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an incinerator according to the present invention. FIG. 2 is a schematic view showing a state in which an incineration object hits a crushing blade and passes through. FIG. 3 is a schematic diagram showing a state in which a burning portion of an incineration object is crushed by crushing blades. FIG. 4 is a longitudinal sectional view showing a conventional incinerator. [Description of Signs] A: Incinerated material A1: Combustion part 1: Incinerated material input port 2: Combustion burner 3: Exhaust gas outlet 4: Furnace main body 5: Incinerated material outlet 6: Rotating hearth 8: Weight 9: crushing blade 10: crushing blade cooling air nozzle 11: crushing blade cooling air supply pipe 12: stirring blade 13: combustion chamber 18: bottom wall 20: combustion air nozzle 26: large-diameter pipe insertion tube 27: Arm 28: Rotary joint 29: Air conduit

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) F23G 5/00 111 F23G 5/00 119 F23G 5/00 ZAB F23G 5/033 ZAB F23G 5/44 ZAB F23G 5/00 108

Claims (1)

(57) [Claims] [Claim 1] An inlet (1) for the incinerated material (A ) and a combustion burner
At the bottom of the furnace body (4) equipped with (2), an exhaust gas outlet (3) and an incineration material discharge port (5), a Rostor rotary hearth equipped with a plurality of hanging stirring blades (12) 6) is arranged around the furnace body (4).
An auxiliary burner (2) and a combustion air nozzle (20) are
It is placed facing away from the
The rotating hearth (6) in the body (4)
In an incinerator where a diversion is formed
Te, the peripheral wall of the furnace body (4), an air supply pipe along a rotary hearth (6) (11) is rotatably mounted on the center line around the tube, the solution
The furnace internal 砕羽root cooling air supply pipe (11) multiple solutions砕羽roots (9) is fixed to the hanging shape, these one in the length direction of the pipe
It is located at regular intervals and extends downward near the rotary hearth (6).
Each crushing blade (9) is hollow, and a plurality of
It has an air nozzle (10) for cooling the crushing blades, and
An air supply pipe (11) for cooling the crushing blades is provided on the side of the wall, and the furnace body (4)
To the large-diameter pipe insertion tube (26)
Through the pipe insertion tube (26) so as to be rotatable in the circumferential direction.
The air supply pipe (11) for cooling the crushing blades
Along the upper side, near the center of the combustion chamber (13)
Outside the furnace of the air supply pipe (11) for cooling the crushing blades.
The arm (27) is fixed to the arm, and the lower end of the arm (27) is
A weight (8) for returning the crushing blades (9) to the hanging position
The outer end of the blade cooling air supply pipe (11) is
The air conduit (29) is connected via the
Dispose of waste with a high water content such as disposable diapers
Inlet (1) as the material to be incinerated (A)
From the furnace to the rotary hearth (6), the incinerated material (A)
(6) rotates slowly in the combustion chamber (3) together with
Ki is incinerated from both the top and bottom of the Rostor rotary hearth (6).
(A) to the ash and other waste generated by incineration
The aircraft hardly stays on the hot rotary hearth (6),
Drops on the cold bottom wall (18) through the rotary hearth (6) made of Stor
The incinerator (A)
If the incinerated material (A) is in a hard state, the incinerated material (A)
Strikes the lower end of the crushing blade (9) and
To the crushing blade (9) and the air supply pipe for cooling the crushing blade (11).
Of the incinerator (A) as it is
After passing under the crushing blades (9)
(8) returns to the original hanging state, and this incinerated material (A)
Next, the fuel injected from the auxiliary burner (2) and the fuel
Air nozzle (20) and multiple air nozzles for crushing blade cooling
A spiral flame formed from the air ejected from (10)
Therefore, it is gradually burned, rotates with the hearth (6),
At the lower end of the crushing blade (9), incineration of the incinerated material (A)
If the crushing of the upper part has progressed to the extent that it can be
The incinerated material (A) hits the crushing blades (9) and the upper combustion section
(A1) is disintegrated and a new surface is exposed,
Push the lower end of the blade (9) forward in the rotation direction, and disintegrate the blade (9).
Is rotated around the center line of the air supply pipe (11) for cooling the crushing blades.
Then, the lower end of the crushing blade (9)
After scraping the baked part (A1) backward, the crushing blade (9)
The original weight and weight (8) return to the original
New surface of incinerator (A) is exposed
In addition, the incineration produced is a rotary hearth made by Rostor (6).
And falls onto the low-temperature bottom wall (18),
The air for cooling the crushing blades always passes through the supply pipe (11).
The air for cooling the crushing blade was received by the crushing blade (9).
When the heat is quickly removed and the temperature rise of the crushing blade (9) is suppressed,
In both cases, combustion of the incineration (A), especially in the center of the combustion chamber (13)
Also used to promote combustion in the head
Incinerator, characterized by being.