JP2005114212A - Waste incinerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively blow air for combustion supplied from a wind box into a furnace body. <P>SOLUTION: The cylindrical furnace body 1 is laid on its side and fixed so that it is tilted downward from an inlet side to an outlet side. A fire grate part 2 is provided in a lower part of the furnace body 1. The wind box 4 is attached to a lower side of the furnace body 1 in correspondence to the fire grate part 2. A divided passage 4a of the wind box 4 in a furnace body 1 longitudinal direction, and a top part of a bulkhead of a divided part 4 in a circumferential direction are attached to a bottom face of the fire grate part 2. A rotor 5 for agitation formed cylindrically by connecting both end parts of a plurality of water pipes 6 arranged in the circumferential direction in correspondence to a furnace body 1 inner circumference to each header pipe 7 and 8 of the inlet side and the outlet side in communicated states, is housed in the furnace body 1 so it can be rotatively driven, and circulation communication of boiler water is carried out. During transfer of waste 11 fed into the furnace body 1 to the outlet side by an inclination of the furnace body 1 while agitating the waste 11 by the rotating rotor 5 for agitation, the waste 11 is burned by the air 12 for combustion blown in from the wind box 4 through the fire grate part 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a waste incinerator used for incinerating waste such as municipal waste.

Rotating stoker-type incineration as one of the devices for incineration of waste, which can efficiently incinerate while continuously and three-dimensionally feeding and stirring waste by rotating a cylindrical stalker furnace body A furnace is known.

As shown in FIGS. 5 (a), (b), and (c), an example of such a rotary stoker type incinerator includes a large number of between the inlet side header pipe 102 and the outlet side header pipe 103 formed in a ring shape. The water pipes 104 are arranged at regular intervals in the circumferential direction, and both ends of the water pipes 104 are connected to the header pipes 102 and 103 on the inlet side and the outlet side, and the gaps between the water pipes 104 are connected. Furthermore, a stoker furnace main body 101 is formed which is formed into a cylindrical shape by attaching fins 107 having a large number of air holes 106 formed at required intervals in the longitudinal direction. Further, the stoker furnace main body 101 is placed in the cover casing 108 so as to be inclined so that the outlet-side header pipe 103 is lower than the inlet-side header pipe 102, and the end portions on the inlet side and the outlet side are placed. The tires 109 attached to the outer periphery are respectively placed on the turning roller 110 to drive the driving device 1.
11, the turning roller 110 is rotated to drive the stalker furnace body 101 to rotate. In each water pipe 104, boiler water is circulated through a rotary joint 112 connected to the outlet side header pipe 103. Furthermore,
Waste material 114 in the charging hopper 113 is supplied to the stalker furnace main body 101 from the inlet side by a dust feeder 115. On the other hand, the stoker furnace main body 101 is disposed at a lower position of the stalker furnace main body 101, and the cover casing 108 is disposed. The combustion air 105 can be blown into the furnace from the lower position in the stalker furnace main body 101 through the air hole 106 from the wind box 116 connected to the furnace.

In the rotary stoker type incinerator having such a configuration, the waste 114 supplied into the stalker furnace main body 101 that is rotated at a low speed is stirred by the rotation of the stalker furnace main body 101, and the stalker furnace main body 101 is inclined. While being sequentially transferred to the downstream side, the wind box 11
6 is combusted by the combustion air 105 supplied from 6 and incinerated.

The wind box 116 has divided flow passages 116 a that are divided into three in the longitudinal direction of the stoker furnace main body 101, and each of the divided flow passages 116 a includes a damper 117, and the supply amount of the combustion air 105 is adjusted by adjusting the damper 117. Is adjusted. As a result, the combustion state in each combustion zone on the inlet side, the middle part, and the outlet side in the stoker furnace main body 101, for example, the disposal in which the layer thickness sequentially decreases as the combustion progresses as the respective combustion zones are sequentially shifted It has been proposed to control the combustion by controlling the supply amount of the combustion air 105 according to the amount of the product 114 (see, for example, Patent Document 1).

Further, each of the divided flow paths 116a of the wind box 116 is divided into a plurality of parts in the circumferential direction as shown in FIG. 5B, and a damper 117 is provided in each divided portion 116b to supply the combustion air 105. As a configuration in which the amount can be adjusted, in addition to the change in the layer thickness of the waste 114 in the longitudinal direction of the stalker furnace body 1 as described above, the circumferential layer of the waste 114 staying at the bottom of the stalker furnace body 101 According to the change in thickness, the divided flow path 116a and the divided portion 1 of the wind box 116 are provided.
It has also been proposed to perform combustion control by controlling the amount of combustion air 105 blown into the furnace from 16b (see, for example, Patent Document 2 and Patent Document 3).

In order to allow the combustion air 105 to be blown into the corresponding positions in the stoker furnace main body 101 from the divided flow path 116a and the divided portion 116b of the wind box 116, the wind in the width direction of the cover casing 108 is determined. A fixed-side seal device 118 is attached to a position near the stalker furnace main body 101 of the connecting part to the box 116 and each of the divided parts 116b in the circumferential direction of the wind box 116. The seal plate 119 that can be bent by an elastic member such as a leaf spring that is attached radially outward to the outside of the water pipe 104 that is a part slides on each of the seal devices 118 while rotating, thereby performing a sealing action. (For example, refer to Patent Document 4).
120 is a secondary combustion chamber, 121 is a post-combustion device.

Japanese Patent Laid-Open No. 11-257616 JP 2000-291928 A JP 2000-291933 A JP 2001-108217 A

However, the stalker furnace body 101 which is the rotating part of the rotary stalker type incinerator has a large diameter (
For example, since it has a diameter of 2 to 3 m and is an integral structure by welding, it is difficult to manufacture a perfect circle with high accuracy, and there is also a swing of the rotating shaft. However, it is difficult to obtain sufficient sealing performance with the sealing device 118 that is a non-rotating part (fixed part), and therefore the combustion air 105 supplied from the wind box 116 is supplied from the stoker furnace body 101. It was not possible to completely prevent leakage to the upper side of the cover casing 108 or leakage of the combustion air 105 between the divided portions 116b of the wind box 116. For this reason, each division | segmentation flow path 116a of the wind box 116 or the division part 11 is carried out.
In 6b, the amount of leaked air is taken into consideration, so that the amount of leakage can be compensated, so that it is retained in the respective sections of the stoker furnace body 101 corresponding to the divided flow paths 116a and the divided portions 116b. In reality, it is necessary to blow in excess combustion air 105 in excess of the amount necessary for burning the waste 114. Therefore, the supply amount control of the combustion air 105 supplied from each divided flow path 116a of the wind box 116 as shown in Patent Document 1, or Patent Document 2
In addition, when performing combustion control by controlling the air supply amount from each divided flow path 116a and each divided portion 116b as shown in Patent Document 3, it is difficult to accurately control the air supply amount. For this reason, it is desired to be able to more accurately control the supply amount of the combustion air 105 according to the combustion state in the furnace.

Moreover, since the amount of combustion air 105 blown in is increased beyond the amount necessary for combustion in consideration of air leakage, it is necessary to make the attached air supply equipment and exhaust gas treatment equipment large.

Furthermore, since the stoker furnace main body 101 is a cylindrical integrated welded structure, it is difficult to repair the grate partially. Therefore, it is possible to repair the grate more easily. Is also desired.

Therefore, the present invention can ensure the sealing property between the furnace body equipped with the grate and the wind box, and can accurately control the air supply amount according to the combustion state in the furnace. Furthermore, an object of the present invention is to provide a waste incinerator that makes it possible to easily repair a grate partially.

In order to solve the above-mentioned problems, the present invention fixes a cylindrical furnace body so that the other end portion is lower than one end portion in the axial direction and is fixed to the lower portion of the furnace body. A wind box provided with a grate part formed with a large number of air holes over a required range in the circumferential direction, and supplying combustion air to the furnace body through the air holes outside the grate part And a water-rotating stirring rotor having a size corresponding to the inner diameter of the furnace body is housed in the furnace body so as to be able to rotate and circulate through the stirring rotor. While the waste supplied from one end side to the furnace body is sequentially transferred to the other end side by the inclined arrangement of the furnace body while stirring by the rotation of the stirring rotor, A structure that can be incinerated by the combustion air blown through the air holes in the grid. To.

Further, fins protruding in the outer peripheral direction of the stirring rotor are attached to the water pipes arranged on the outer periphery of the stirring rotor, and the protruding ends of the fins are connected to the furnace along with the rotation of the stirring rotor. It is configured to pass through a position near the inner peripheral surface of the body.

Further, the wind box is provided with a plurality of divided flow paths in the longitudinal direction of the furnace body, and each divided flow path is provided with a divided portion divided in the circumferential direction of the furnace body. Both the partition walls and the tops of the partition walls are in contact with the bottom surface of the grate portion of the furnace body.

Furthermore, a grate unit having a required size in which a large number of air holes that are curved along the circumferential direction of the furnace body and penetrated in the radial direction are formed in the longitudinal direction and the circumferential direction of the furnace body. A configuration is adopted in which a required number of each is arranged.

Furthermore, the grate unit is configured as a hollow box structure with a cooling water flow path provided therein.

Furthermore, it is set as the structure which attached the water cooling jacket to the outer side of the upper area | region except the grate part of a furnace body.

According to the waste incinerator of the present invention, the following excellent effects are exhibited.
(1) A cylindrical furnace body is horizontally placed and fixed so that the other end portion is lower than the one end portion in the axial direction, and a large number of parts are provided at the lower portion of the furnace body over a required range in the circumferential direction. A grate portion formed by punching air holes is provided, and a wind box for supplying combustion air to the furnace body through each air hole is integrally attached to the outside of the grate portion, and the furnace body A stirring rotator having a water tube structure having a size corresponding to the inner diameter of the agitator is housed in the furnace body so as to be rotationally driven so that water can circulate and circulate in the stirring rotator. While the waste supplied from the side is sequentially transferred to the other end side by the inclined arrangement of the furnace body while being stirred by the rotation of the stirring rotor, the combustion is blown from the wind box through the air hole of the grate part Since it is designed to be incinerated with industrial air, Combustion that is blown without leaking from the bottom of the furnace body through the air hole of the fixed grate part from the wind box while transferring the waste supplied inside to the other end side of the furnace body with three-dimensional stirring It can be incinerated by efficiently burning with industrial air.
(2) Since the wind box is integrally attached to the furnace body so as to correspond to the grate portion, a sealing mechanism for preventing air leakage is not required, and the entire amount of combustion air supplied from the wind box is eliminated. Therefore, the supply amount of combustion air does not need to be more than the amount necessary for burning the waste in the furnace body. Can be reduced in size.
(3) Since the rotating body for stirring can be cooled by circulating and circulating water, it can be protected from high-temperature combustion heat generated during combustion of waste in the furnace, and at the same time burned by the circulating and circulating water. It is possible to recover heat.
(4) A fin protruding in the outer peripheral direction of the stirring rotator is attached to each water pipe disposed on the outer periphery of the stirring rotator, and the projecting end of each fin is rotated along with the rotation of the stirring rotator. By adopting a configuration in which the position near the inner peripheral surface of the furnace body is passed,
Since the waste can be agitated by the water pipe and the fin, it is possible to improve the agitation efficiency of the waste.
(5) The wind box includes a plurality of divided flow paths in the longitudinal direction of the furnace body, and each divided flow path includes a plurality of divided portions divided in the circumferential direction of the furnace body. Each partition channel and each top of the partition wall of each divided channel are configured to be in contact with and attached to the bottom surface of the grate portion of the furnace body. The combustion air supplied through the dividing portion can be reliably blown into the corresponding portion in the furnace body through the grate portion. Therefore, it is possible to reliably control the amount of combustion air supplied from each of the divided flow paths and the divided parts into the furnace, and to accurately control the combustion of waste by controlling the amount of combustion air supplied. It becomes possible to carry out.
(6) A grate unit having a required size in which a large number of air holes that are curved along the circumferential direction of the furnace body and penetrate in the radial direction are formed in the longitudinal direction and the circumferential direction of the furnace body. By making the required number of each arranged and arranged, the grate part of the furnace body can be divided, so that when the grate part is damaged, the damaged grate unit is By replacing the grate unit with a new grate unit, it becomes possible to easily repair the grate part.
(7) In the above, the grate unit is configured as a hollow box structure and a cooling water flow path is provided therein, whereby each grate unit can be water-cooled to cool the grate part with water. Therefore, the grate portion can be protected from the high-temperature combustion heat generated when the waste is burned in the furnace, and the combustion heat of the waste can be recovered.
(8) By adopting a configuration in which a water cooling jacket is attached outside the upper region excluding the grate portion of the furnace body, the upper region other than the grate portion of the furnace body can be water-cooled, and waste in the furnace body It is possible to protect the grate portion from the high-temperature combustion heat generated during the combustion of and to recover the combustion heat of the waste.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

1 (a), (b) to FIG. 3 show an embodiment of the waste incinerator of the present invention. The other end of the cylindrical furnace body 1 is located on the outlet side rather than the end portion on the inlet side. Inclined so that the part is lower and placed sideways and fixed on the foundation via a support member (not shown), a plurality of air holes 3 are drilled at the lower required position of the peripheral wall of the furnace body 1 And the wind box 4 is integrally attached to the outer peripheral side of the lower portion of the furnace body 1 corresponding to the grate portion 2. On the other hand, both ends of a plurality of water pipes 6 arranged at regular intervals in the circumferential direction corresponding to the inner diameter of the furnace body 1 are connected to an inlet-side header pipe 7 and an outlet header pipe 8 formed in a ring shape, respectively, to form a cylinder. The stirring rotating body 5 is formed, and the stirring rotating body 5 is housed in the furnace body 1 so as to be rotationally driven. Further, a dust feeder 10 connected to the lower end of the charging hopper 9 is connected to the inlet side of the furnace body 1 in the same manner as the dust feeder 115 shown in FIGS. 5 (a), (b) and (c). Then, while the waste 11 supplied into the furnace body 1 by the dust feeder 10 is agitated by the rotation of the stirring rotating body 5, the waste 11 is sequentially transferred to the outlet side with the inclined arrangement of the furnace body 1. In addition, combustion can be performed by the combustion air 12 blown from the lower position in the furnace body 1 through the air holes 3 of the grate portion 2 from the wind box 4.

Details will be described below.
The lower part of the fixed furnace body 1 corresponds to the circumferential direction of the furnace body 1 as shown in FIGS. The grate portion 2 is formed by arranging a required number of rectangular steel grate units 13 having a plurality of air holes 3 curved in the circumferential direction and the longitudinal direction. Further, each of the grate units 13 is provided as a hollow box-shaped structure having a cross-sectional fan shape, and the air holes 3 are formed in a cylindrical shape so as to penetrate in the radial direction, and a required portion inside the box-shaped structure is provided. The cylindrical air holes 3 are connected to each other, or a partition plate 14 that connects the air holes 3 and the inner wall surface of the box structure is provided to form a cooling water flow path 17, which becomes the outer peripheral side of the furnace body 1. A required portion on the outer side surface, for example, a water supply port 15 and a water discharge port 16 provided at diagonal positions are configured to communicate with each other through the cooling water channel 17. Therefore, a boiler water circulation mechanism (not shown) is connected to the water supply port 15 and the water discharge port 16 via a water supply line 18 and a water discharge line 19, respectively, and the boiler water 20 is supplied to the water supply line 18, the water supply port 15, and the cooling water channel 17. ,
Circulating and circulating the drain port 16 and the drain line 19 in order allows each grate unit 13 to be water cooled, thereby enabling the entire grate unit 2 of the furnace body 1 to have a water cooling structure. The recovery of the combustion heat of the waste 11 burned in the furnace body 1 can be achieved.

Further, in the upper region of the peripheral wall portion excluding the grate portion 2 of the furnace body 1, a water cooling jacket 21 is provided on the outer peripheral side as shown in FIGS. By circulating the boiler water by a boiler water circulation mechanism (not shown) similar to the above, the upper region of the furnace body 1 is water-cooled, and at the same time, heat recovery when the waste 11 is burned in the furnace body 1 can be achieved. I can do it.

Further, on the downstream side of the furnace body 1, as in the secondary combustion chamber 120 and the post-combustion device 121 in the rotary stoker type incinerator shown in FIGS. 22 and a post-combustion device 23 are attached so that complete combustion of unburned gas and unburned matter that cannot be burned in the furnace body 1 can be achieved.

The wind box 4 has the divided flow paths 4a divided into three in the longitudinal direction of the furnace body 1 in the same manner as the wind box 116 shown in FIGS. A damper 24 is provided for each 4a, and by adjusting each damper 24, the supply amount of the combustion air 12 supplied through each of the divided flow paths 4a can be individually adjusted, and each of the divided flow paths 4a 1 is divided into a plurality of parts (three parts in the figure) in the circumferential direction as shown in FIG. 1B, and each of the divided parts 4b is provided with a damper 24. By adjusting each of the dampers 24, each of the divided parts is provided. Combustion air 12 supplied through 4b
The supply amount of each of the divided flow paths 4a and the top of the divided walls of the divided portions 4b can be adjusted to the lower surface of the grate portion 2 of the furnace body 1 without any gaps. It is designed to be in contact.

As shown in FIG. 3, the stirring rotating body 5 has the inlet-side header pipe 7, the outlet-side header pipe 8, and a number of water pipes 6 connected to both header pipes 7 and 8 in communication at both ends. doing.
The inlet side header pipe 7 extends outwardly on the inlet side on the axial center of the cylindrical rotating body 5 and feeds the dust inside the circumferentially required intervals (four in the figure). A base of an inlet-side central shaft 25 arranged so as to pass through a required portion of a front side wall (reactor body side wall) 9a of the charging hopper 9 through the charging hopper 9 at a position where it does not interfere with the apparatus 10 and protrudes to the outside. The end portions are integrally connected through a radial connecting member 26.

On the other hand, the outlet-side header pipe 8 is disposed outwardly on the outlet side on the axial center of the rotating body 5 for agitation, in the same manner as the inlet-side central shaft 25, at the required intervals in the circumferential direction (four in the figure). Extending towards
The outlet-side central shaft 27 having a double-pipe structure arranged so as to pass through the secondary combustion chamber 22 and pass through a required portion of the rear side wall (reactor body side wall) 22a of the secondary combustion chamber 22 to protrude outside. The base end is
A hollow pipe structure is integrally connected through a radial connecting pipe 28, and boiler water is supplied from the inner and outer pipes (not shown) of the outlet side central shaft 27 through the connecting pipes 28. A circulation flow path for boiler water that can be circulated through the header pipes 7 and 8 and the water pipes 6 on the inlet side and the outlet side of the rotating body 5 for stirring is formed.

Further, the front end portion of the inlet-side central shaft 25 is rotatably supported by a bearing 29 installed on a required support base (not shown) at a position outside the front side wall 9 a of the charging hopper 9. On the other hand, the front end portion of the outlet-side central shaft 27 is rotatably supported by a bearing 30 installed on the upper side of the casing of the post-combustion device 23 on the fixed side at a position outside the rear side wall 22a of the secondary combustion chamber 22. Let Furthermore, the front end portion of the inlet-side central shaft 25 is protruded to the outside of the corresponding bearing 29, and a rotary drive device 31 is connected to a required power transmission mechanism 32, for example, the rotary drive device. 31
A drive sprocket 33 attached integrally to the output shaft, a driven sprocket 34 attached integrally to the tip of the inlet side central shaft 25, and a chain 35 wound endlessly around the sprockets 33 and 34. The rotary drive device 31 is connected via a power transmission mechanism 32.
Further, the stirring rotator 5 can be rotationally driven in the furnace body 1 integrally with the inlet-side central shaft 25 by the rotational driving force transmitted through the power transmission mechanism 32. Further, the tip end portion of the outlet side central shaft 27 protrudes from the corresponding bearing 30, and the protruding end portion is connected to FIG.
B) Rotary joint 3 similar to the rotary joint 112 shown in (b) (c)
A boiler water circulation mechanism (not shown) is connected to the boiler water circulation mechanism 7 so that the boiler water can be circulated through the boiler water circulation passage formed in the stirring rotor 5 with the boiler water circulation mechanism. It is. As a result, as the stirring rotator 5 is driven to rotate, the water pipes 6 arranged at required intervals in the circumferential direction of the stirring rotator 5 are rotationally moved along the inner peripheral surface of the furnace body 1. The waste water 11 staying in the furnace body 1 can be agitated by using the water pipes 6 that are rotated and moved as the stirring rods. 5 can be cooled with water, and heat recovery during combustion of the waste 11 in the furnace body 1 can be achieved.

In the above, in order to perform the stirring of the waste 11 in the furnace body 1 accompanying the rotational driving of the stirring rotating body 5 more efficiently, as shown in FIGS. Each water pipe 6
Further, the stirring fins 36 are respectively provided so as to protrude outward in the radial direction of the stirring rotating body 5, and the projecting end portions of the fins 36 are in the furnace body 1 when the stirring rotating body 5 is driven to rotate. The furnace body 1 is formed by fins 36 that rotate in unison with the water pipes 6 so as to draw a locus close to the inner peripheral surface of the water pipe 6.
The waste 11 staying inside may be stirred from a position closer to the inner peripheral surface of the furnace body 1.

In addition, a sealing mechanism (not shown) is provided in a portion of the entrance-side central shaft 25 that penetrates the front side wall 9a of the charging hopper 9, so that waste 11 and gas in the charging hopper 9 can be prevented from leaking. Further, a sealing mechanism (not shown) is provided in a portion of the outlet side central shaft 27 that penetrates the rear side wall 22a of the secondary combustion chamber 22 so that the airtightness between the inside and the outside of the secondary combustion chamber 22 can be maintained. .

Furthermore, the cylindrical shape of the stirring rotating body 25 may be reinforced by a reinforcing material as long as the movement of the waste 11 from the inlet side to the outlet side in the furnace body 1 is not hindered. That is, for example, as shown in FIG. 3, the intermediate portions in the longitudinal direction of the water pipes 6 may be connected by a ring-shaped reinforcing material 38. Further, the portions of the reinforcing member 38 facing each other in the diametrical direction in the circumferential direction are connected to each other by the reinforcing member 39, or the base end portion of the inlet-side central shaft 25 is extended to the inside of the stirring rotator 5. It may be connected to the reinforcing member 39. In this case, the reinforcing members 38 and 39 and the base end portion of the inlet-side central shaft 25 to be disposed in the furnace body 1 are all hollow structures and are formed in the stirring rotor 5. It should be incorporated into a part of the water circulation channel.

When the waste incinerator of the present invention is used, the rotating body 5 for stirring is rotated by the rotation drive device 31.
And the dampers 24 of the divided flow paths 4a and 4b of the wind box 4 are adjusted as appropriate, and a required amount of combustion air 12 is supplied from the divided flow paths 4a and 4b.
Furthermore, the boiler water 20 is circulated through each of the grate units 13 of the grate unit 2 of the furnace body 1, the water cooling jacket 21, and the stirring rotor 5 by the boiler water circulation mechanism. Waste 11 in the hopper 9 is supplied into the furnace body 1 by a dust feeder 10. The waste 11 supplied in the furnace body 1 tends to stay in the lower position in the furnace body 1, but the water pipe 6 of the rotating body 5 for stirring and the stirring pipe attached to the water pipe 6. The fin 36 of
Since the water pipe 6 and the fins 36 pass through the lower part of the furnace body 1 because the water pipe 6 and the fin 36 pass through the inner peripheral surface of the furnace body 1, the staying waste 11 is three-dimensionally stirred in the vertical direction. At the same time, the furnace body 1 is sequentially transferred downstream as the furnace body 1 is inclined. For this reason, waste 11
Is the air hole 3 of the grate part 2 provided in the lower part of the furnace body 1 from each divided flow path 4a and the divided part 4b of the wind box 4 while the agitation and the transfer to the outlet side of the furnace body 1 are performed. Through the combustion air 12 blown from below through the air, it is efficiently burned and incinerated.

Although the inside of the furnace body 1 becomes high temperature due to the combustion heat of the waste 11, the grate part 2 at the lower part of the furnace body 1 has a water-cooled structure in which the boiler water 20 can be circulated through each grate unit 13. In addition, since the upper portion of the furnace body 1 has a water cooling structure by the water cooling jacket 21, the furnace body 1 is protected from high temperature combustion heat throughout. In addition, since the place arranged in the furnace body 1 of the rotating body 5 for stirring has a water pipe structure in which boiler water can be circulated and circulated, the rotating body 5 for stirring is also protected from high-temperature combustion heat. At the same time, the grate part 2 of the furnace body 1 and the water cooling jacket 2
1. Recovery of combustion heat of the waste 11 is efficiently performed by boiler water used for cooling the rotating body 5 for stirring.

Note that the unburned gas and unburned matter remaining after passing through the furnace body 1 are completely burned in the secondary combustion chamber 22 or the post-combustion device 23 as in the conventional rotary stoker type incinerator.

Thus, according to the waste incinerator of the present invention, the waste 11 supplied into the furnace body 1 is fixed while being transferred to the outlet side of the furnace body 1 while being stirred by the rotating body 5 for stirring. The combustion air 12 can be efficiently burned and incinerated while being blown through the air holes 3 of the grate portion 2 from the divided flow path 4a and the divided portion 4b of the wind box 4 without leaking.

At this time, the wind box 4 is integrally attached to the furnace body 1 so as to correspond to the grate portion 2,
Since both the partition wall of the divided flow path 4a and the partition wall of the divided portion 4b are attached with the top portion in contact with the bottom surface of the grate portion 2, a sealing mechanism between the wind box 4 and the furnace body 1 can be eliminated. At the same time, the combustion air 12 blown through the divided flow paths 4a and the divided portions 4b of the wind box 4 is surely blown into the respective attachment positions of the divided flow paths 4a and the divided portions 4b in the grate portion 2. Can do. Therefore, unlike the conventional rotary stoker type incinerator, it is possible to eliminate the need to consider the amount of air leaking out, so that the grate portion is separated from each divided flow path 4a and divided portion 4b of the wind box 4. The combustion air 12 in an amount necessary for the combustion of the waste 11 existing in each of the corresponding areas of the combustion air 12 may be blown in, and as shown in Patent Document 1, Patent Document 2, and Patent Document 3. The combustion air 12 according to the combustion state of the waste 11
Therefore, it is possible to accurately control the air supply amount when performing combustion control by controlling the supply amount.

Further, since it is not necessary to supply the combustion air 12 in an amount more than that required for burning the waste 11, it is possible to reduce the size of the air supply facility and the exhaust gas treatment facility.

Furthermore, since the grate portion 2 of the furnace body 1 is formed by arranging the grate units 13 in the circumferential direction and the longitudinal direction, when a part of the grate units 13 is damaged, If the grid unit 13 is replaced with a new grate unit 13, the grate unit 2 can be repaired easily.

The present invention is not limited to the above embodiment, and the rotary drive device 31 may be connected to the outlet-side central shaft 27 via the power transmission mechanism 32. If the stirring rotator 5 can be rotationally driven by the rotational driving force of the rotational driving device 31, the power transmission mechanism 32 can be
A type other than the type using 3, 34 and the chain 35 may be used. In the above,
The stirring rotator 5 is shown as being rotatably supported by the bearing via the central shafts 25 and 27 on the inlet side and the outlet side, but prevents leakage of waste 11 and combustion gas from the furnace body 1. If possible, as shown in FIG. 4, a fire-resistant tire 40 is provided on the outer periphery of both ends in the longitudinal direction of the furnace body 1.
The grate portion (not shown in the figure) of the furnace body 1 is attached to the tire 40 by a turning roller 41 similar to the turning roller 110 of the rotary stoker incinerator provided outside the furnace body 1. A support structure and a rotational driving force for the agitating rotating body 5 are provided such that the rotating roller 41 is supported by the opening 42 provided at the lower required position and the turning roller 41 applies a rotational driving force to the furnace body 1. The mechanism for this may be set freely. Although it is preferable that the furnace body 1 has a water-cooled structure from the viewpoint of recovering the combustion heat of the waste 11, a part or the whole of the furnace body 1 is refractory such as a refractory brick or a castable refractory inside the iron skin. As a structure formed by attaching the material, the water cooling structure of the furnace body 1 may be partially or entirely omitted in correspondence with the portion to which the refractory material is attached. In addition, it goes without saying that various changes can be made without departing from the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS One Embodiment of the waste incinerator of this invention is shown, (A) is a schematic cut | disconnection side view, (B) is an AA direction arrow enlarged view of (A). FIG. 2 is an enlarged view of a grate portion in the waste incinerator of FIG. It is an expansion perspective view of the rotary body for stirring in the waste incinerator of FIG. It is a schematic perspective view which shows the furnace body part in other form of implementation of the rotary body for stirring in the waste incinerator of this invention. It shows the outline of the rotary stoker type incinerator. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Furnace 2 Grate part 3 Air hole 4 Air box 4a Divided flow path 4b Divided part 5 Stirring rotating body 6 Water pipe 7 Inlet side header pipe (water pipe)
8 Outlet header pipe (water pipe)
11 Waste 12 Combustion Air 13 Grate Unit 17 Cooling Water Channel 20 Boiler Water (Water)
21 Water-cooled jacket 36 Fin

Claims (6)

A cylindrical furnace body is fixed in a horizontal position so that the other end is lower than one end in the axial direction, and a number of air holes are provided in the lower part of the furnace body over the required range in the circumferential direction. A grate portion formed by drilling is provided, and a wind box for supplying combustion air to the furnace body through the air holes is integrally attached to the outside of the grate portion, and the inner diameter of the furnace body is provided. A stirring rotor of a water tube structure having a corresponding size is housed in the furnace body so as to be rotationally driven, and water can be circulated and circulated through the stirring rotor, and supplied to the furnace body from one end side. While the waste to be discharged is sequentially transferred to the other end side by the inclined arrangement of the furnace body while being stirred by the rotation of the stirring rotor, the combustion air blown from the wind box through the air hole of the grate part A waste incinerator characterized in that it can be incinerated. A fin projecting in the outer circumferential direction of the stirring rotor is attached to each water pipe disposed on the outer periphery of the stirring rotor, and the projecting end of each fin is connected to the furnace body as the stirring rotor rotates. The waste incinerator according to claim 1, wherein the waste incinerator passes through a position near the inner peripheral surface. The wind box includes a plurality of divided flow paths in the longitudinal direction of the furnace body, and each divided flow path includes a plurality of divided portions divided in the circumferential direction of the furnace body. The waste incinerator according to claim 1 or 2, wherein both the partition walls of the road and the top portions of the partition walls of the respective divided portions are attached in contact with the bottom surface of the grate portion of the furnace body. The required number of grate units with the required dimensions in which a number of air holes that are curved along the circumferential direction of the furnace body and pierce in the radial direction are drilled in the longitudinal direction and the circumferential direction of the furnace body. The waste incinerator according to claim 1, 2 or 3, wherein the waste incinerator is arranged and formed. 5. The waste incinerator according to claim 4, wherein the grate unit has a hollow box structure and is provided with a cooling water passage. A water cooling jacket is attached outside the upper region excluding the grate part of the furnace body.
4 or 5 waste incinerator.

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