WO2020017373A1

WO2020017373A1 - Garbage incineration facility

Info

Publication number: WO2020017373A1
Application number: PCT/JP2019/026953
Authority: WO
Inventors: 中田　進
Original assignee: 株式会社ブルークロス
Priority date: 2018-07-17
Filing date: 2019-07-08
Publication date: 2020-01-23
Also published as: JP6923209B2; JP2020012583A

Abstract

Provided is a garbage incineration facility wherein the replacement frequency of an air duct can be reduced by preventing premature melting loss of a lower portion of the air duct due to overheating, combustion air released from the lower portion of the air duct can be reliably fed to flammable garbage being burned near the hearth floor, and complete incineration can be achieved more quickly. An air supply device for supplying combustion air is equipped with a blower 28, upper area ducts 30 for supplying combustion air to the upper half of a combustion chamber 101, and hearth floor area ducts 31 for supplying combustion air near the hearth floor 102 of the combustion chamber 101. Each duct 30, 31 is formed of a pipe main body 110 the lower end of which is covered by a plug 104, and on the lower peripheral surface of which a group of air spray holes 112 is formed. The lower end of the upper area ducts 30 is positioned near the center of the vertical height of the combustion chamber 101. The lower end of the hearth floor area ducts 31 is positioned at the hearth floor 102 of the combustion chamber 101, and the periphery of the lower end portion is covered by a holder body 114 made of a fire-resistant material and provided on the hearth floor 102.

Description

Waste incineration equipment

The present invention relates to a refuse incineration facility for incinerating combustible refuse in a combustion chamber while supplying pressurized combustion air from a plurality of air pipes fixed to the incinerator to the combustion chamber.

Patent Document 1 discloses that in the field of refuse incineration equipment, an air supply pipe for supplying pressurized combustion air to a combustion chamber is provided. The incinerator described in Patent Literature 1 has a furnace main body including an inlet block provided with an inlet and a door, a flue port block provided with a flue port, and an intermediate block arranged between these blocks. You. The interior of the incinerator is divided into a combustion chamber on the upper side and an ash chamber on the lower side by a roster provided on the hearth. A pair of front and rear air supply pipes are fixed to the inlet block and the stack port block, respectively. Looking upwards. A group of fuze holes are formed at regular intervals on the pipe peripheral surface of the air supply pipe facing the combustion chamber. A pair of front and rear cyclone type dust collectors are disposed inside the exhaust device connected to the stack block.

Japanese Patent Publication No. 07-056371

では In the incinerator disclosed in Patent Document 1, a group of blowout ports are formed at regular intervals on the pipe peripheral surface of the air supply pipe facing the combustion chamber. Therefore, most of the pressurized and supplied combustion air is discharged from the upper half of the air supply pipe to the combustion chamber, and only a small amount of combustion air is discharged from the lower part of the air supply pipe. In addition, the lower end of the air supply pipe is located in the upper part near the rostrum, and is easily exposed to high-temperature heat. Therefore, it is inevitable that the lower part of the air pipe is overheated and melted early, so that the air pipe needs to be replaced frequently. Further, the combustion air discharged from the lower part of the air pipe does not easily reach the combustible waste burning near the hearth, and it takes much time to completely burn the combustible waste.

An object of the present invention is to prevent the lower part of the air pipe from being overheated and being melted early, thereby reducing the frequency of replacement of the air pipe, and further reducing the combustion air released from the lower part of the air pipe near the hearth. It is an object of the present invention to provide a refuse incineration facility capable of surely feeding combustible waste burning in a refuse and incinerating combustible waste in a shorter time.

The refuse incineration equipment of the present invention includes an incinerator 1 having a refuse inlet 24, a dust collector 3 connected to the incinerator 1 for removing dust in combustion exhaust gas, and a combustion chamber 101 of the incinerator 1. An air supply device for supplying air. The air supply device includes a blower 28 for supplying combustion air under pressure, a plurality of upper area air supply pipes 30 for supplying the combustion air supplied from the blower 28 to the upper half of the combustion chamber 101, and a blower 28. And a plurality of hearth area air supply pipes 31 for feeding the combustion air fed from the furnace to the vicinity of the hearth 102 of the combustion chamber 101. The upper area air supply pipe 30 and the hearth area air supply pipe 31 are formed of a steel pipe main body 110 whose lower end is closed and a group of fuze holes 112 is opened on the lower peripheral surface. The lower end of the upper area air supply pipe 30 is located near the center of the vertical height of the combustion chamber 101. The lower end of the hearth area air supply pipe 31 reaches the hearth 102 of the combustion chamber 101. A feature is that the periphery of the lower end of the hearth area air supply pipe 31 is covered with a holder body 114 made of a refractory material provided on the hearth 102.

The upper area air supply pipe 30 and the hearth area air supply pipe 31 are formed of a steel pipe main body 110 having the same structure and vertical length. The upper area air supply pipe 30 is fixed to the ceiling wall of the combustion chamber 101, and the lower end of the pipe main body 110 is located near the center of the vertical height of the combustion chamber 101. The hearth area air supply pipe 31 is fixed to the bottom wall of a fireproof cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, and the lower end of the tube body 110 reaches the hearth 102.

The holder body 114 is formed of a ring-shaped refractory material swelling on the hearth 102, and has a holding hole 115 formed at the center thereof for holding the lower end of the hearth area air supply pipe 31. The lower end of the hearth area air supply pipe 31 is covered by the fireproof wall 106 around the holding hole 115.

の上 The upper opening of the fireproof cylinder 113 is exposed outside the ceiling wall of the combustion chamber 101 and connected to the air supply passage 103 for supplying combustion air. The air supply passage 103 and the hearth area air supply tube 31 are connected via an in-cylinder space 109 of the refractory tube 36 having a larger sectional area than these passages.

噴 At a plurality of locations in the circumferential direction at the lower portion of the pipe main body 110, fume holes 112 are formed at equal intervals and in multiple stages in the up-down direction, and the fume holes 112 of each stage are adjacent in a staggered manner. In the formation region of the fumarole 112, the upper and lower adjacent pitch P1 of the fumarole 112 formed on the lower half side is set smaller than the upper and lower adjacent pitch P2 of the fumarole 112 formed on the upper half side.

The incinerator 1 is configured by connecting an end block 4, an end block 5 connected to the dust collecting device 3, and a plurality of intermediate blocks 6 arranged between the

blocks

4,5. When the length direction of the incinerator 1, which is the connection direction of the

blocks

4, 5, and 6, is defined as the left-right direction, and the direction orthogonal to the left-right direction is defined as the front-rear direction, the front-rear direction of the end block 4 and the intermediate block 6 is defined. Upper area air supply pipes 30 and hearth area air supply pipes 31 are alternately arranged.

The combustion chamber 101 includes a first-stage combustion chamber 7 facing the waste inlet 24 and a next-stage combustion chamber 8 continuous with the combustion chamber 7, and the hearth 10 of the second-stage combustion chamber 8 is It is provided in a stepped manner with respect to the hearth 9. The hearth 10 of the next combustion chamber 8 is provided with an ash discharge port 15 for dropping and discharging incinerated ash outside the combustion chamber 101. A first pusher 13 that intermittently sends combustible waste burning in the first-stage combustion chamber 7 to the next-stage combustion chamber 8 is provided inside the first-stage combustion chamber 7. A second pusher 14 for intermittently sending the incineration ash in the next combustion chamber 8 toward the ash outlet 15 is provided inside the next combustion chamber 8. A plurality of upper area air supply pipes 30 and a plurality of hearth area air supply pipes 31 are provided in each of the first-stage combustion chamber 7 and the second-stage combustion chamber 8. A plurality of upper area air supply pipes 30 and a plurality of hearth area air supply pipes 31 are arranged so as to sandwich the forward-retreat trajectory of the transfer blade 20 of the first pusher 13 and the transfer blade 21 of the second pusher 14 back and forth. ing.

In the refuse incineration plant of the present invention, the air supply device is provided with the blower 28, the plurality of upper area air supply pipes 30, and the plurality of hearth area air supply pipes 31. The lower end of the upper area air supply pipe 30 is located near the center of the vertical height of the combustion chamber 101, and the lower end of the hearth area air supply pipe 31 reaches the hearth 102 of the combustion chamber 101. Is covered with a holder body 114 made of refractory material provided on the hearth 102.

According to the refuse incineration system configured as described above, the inside of the combustion chamber 101 can be evenly filled with the combustion air by the upper area air pipe 30 and the hearth area air pipe 31. Further, since the lower end of the hearth area air supply pipe 31 reaches the hearth 102, the combustion air released from the lower part of the hearth area air supply pipe 31 is reliably discharged to the combustible waste burning near the hearth 102. , The combustible waste in the combustion chamber 101 can be effectively incinerated, and the combustible waste can be incinerated in a shorter time. Furthermore, since the lower end of the hearth area air supply pipe 31 is covered with the holder body 114 made of a refractory material, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperatures and melted. As a result, the frequency of replacement of the air supply pipe 31 can be reduced, and the interval at which the operation of the waste incineration equipment is stopped for replacing the hearth area air supply pipe 31 can be prolonged. In other words, the waste incineration equipment can be extended. The operation time of the waste incinerator can be reduced by that much since the operating time of the incinerator can be prolonged.

The upper area air supply pipe 30 and the hearth area air supply pipe 31 are formed of a steel pipe main body 110 having the same structure and the same vertical length, and the hearth area air supply pipe 31 is fixed to the bottom wall of the fireproof cylinder 113. The lower end of the main body 110 reached the hearth 102. As described above, when each of the

air supply pipes

30 and 31 is formed by the pipe body 110 having the same structure and the same vertical length, two types of air supply pipes are prepared, and each air supply pipe is separated from the ceiling wall of each combustion chamber 101. Since it is sufficient to prepare one kind of pipe main body 110 as compared with the case where the pipes are protruded in the furnace, the cost of each of the

air supply pipes

30 and 31 can be reduced correspondingly. Further, since the hearth area air supply pipe 31 is fixed to the bottom wall of the fireproof cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, the low temperature combustion air supplied to the fireproof cylinder 113 supplies the hearth area air supply pipe. The upper part of the trachea 31 can be cooled.

The holder body 114 is formed of a ring-shaped refractory material, and a holding hole 115 for holding a lower end portion of the hearth area air supply pipe 31 is formed at the center thereof. As described above, when the periphery of the lower end portion of the hearth area air supply pipe 31 is covered with the refractory wall 106 around the holding hole 115, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperature and melted well. . Therefore, the replacement frequency of the hearth area air supply pipe 31 can be further reduced.

(4) The air supply passage 103 and the hearth area air supply pipe 31 connected to the upper opening of the fireproof tube 113 are connected via the in-cylinder space 109 of the fireproof tube 36 having a larger sectional area than these passages. According to such an air supply structure, since the inside of the refractory tube 36 is filled with the low-temperature combustion air, the upper portion of the hearth area air supply tube 31 can be cooled to prevent the tube 31 from becoming high temperature. In addition, the replacement of the hearth area air supply pipe 31 can be performed smoothly and promptly by an amount corresponding to the large in-cylinder space 109.

In the formation region of the fumarole 112, the upper and lower adjacent pitch P1 of the fumarole 112 formed on the lower half side is set smaller than the upper and lower adjacent pitch P2 of the fumarole 112 formed on the upper half side. . According to such an air supply structure, more combustion air is blown out from the lower end of the pipe main body 110, and the lower end of the pipe main body 110 can be effectively cooled. Thus, it is possible to prevent early wear.

The incinerator 1 is configured by connecting the end block 4, the end block 5, and the plurality of intermediate blocks 6 arranged between the two

blocks

4,5. According to such a refuse incinerator, it is only necessary to transport each

block

4, 5, 6 manufactured in the factory to the construction site and assemble it, and reduce costs required for manufacturing, transport, etc. of each

block

4, 5, 6; Waste incineration facilities can be built in a shorter period of time. Further, since the upper area air supply pipes 30 and the hearth area air supply pipes 31 are alternately arranged before and after the end block 4 and the intermediate block 6, the combustion air is uniformly supplied to every corner inside the combustion chamber 101. In addition, combustible waste can be incinerated more effectively.

(4) The combustion chamber 101 is constituted by the first-stage combustion chamber 7 and the next-stage combustion chamber 8, and the hearth 10 of the next-stage combustion chamber 8 is provided in a stepped manner with respect to the hearth 9 of the first-stage combustion chamber 7. Also, a first pusher 13 is provided inside the pre-combustion chamber 7 and a second pusher 14 is provided inside the next-combustion chamber 8, so that combustible waste and incinerated ash are intermittently sent by the

respective pushers

13 and 14. I made it. According to such an incinerator, the combustible waste on the hearth 9 of the pre-combustion chamber 7 is intermittently sent to the next-stage combustion chamber 8 by the transfer blade 20 of the first pusher 13 and dropped, so that the combustible waste is dropped. The unburned refuse in the refuse is stirred and exposed to the surface of the refuse lump, and can be effectively dried and burned in the next-stage combustion chamber 8. Further, a plurality of upper area air supply pipes 30 and a plurality of hearth area air supply pipes 31 are provided in each of the first combustion chamber 7 and the next combustion chamber 8, and each of the air supply pipes 30 is connected to a transfer blade of each

pusher

13, 14. The entry and exit trajectories of 20 and 21 are arranged so as to sandwich them back and forth. According to such a waste incineration facility, when the combustible waste is moved by the first pusher 13 or the incineration ash is moved by the second pusher 14, the combustible waste and the incineration ash hit the pipe end of the hearth area air supply pipe 31. The combustion air is evenly supplied to the pre-combustion chamber 7 and the next-stage combustion chamber 8 while reliably preventing the combustion of combustible waste and unburned waste during combustion.

It is the longitudinal front view which omitted some refuse incineration facilities concerning Example 1 of the present invention. It is an overall plan view of a refuse incineration facility. It is a vertical front view which shows the schematic structure of a refuse incinerator. FIG. 2 is a sectional view taken along line AA in FIG. 1. It is a vertical side view which shows the outline of an air supply apparatus. It is a vertical front view which shows the air supply pipe in a front stage combustion chamber and a next stage combustion chamber. It is sectional drawing which shows the blowing hole of an air supply pipe, and a pipe holding structure. It is a vertical front view which shows the structure of a refuse inlet. It is sectional drawing which shows operation | movement of a rotary drum and a flame insulation damper. It is the longitudinal front view which omitted a part of refuse incineration equipment concerning Example 2 of the present invention.

Embodiment 1 FIGS. 1 to 9 show Embodiment 1 of a refuse incineration plant according to the present invention. The front, rear, left, right, and up and down in the present invention follow the cross arrows shown in FIGS. 1 and 2 and the front, rear, left, right, and top and bottom notations near the cross arrows. In FIG. 2, the waste incineration equipment is disposed between a first incinerator (incinerator) 1, a second incinerator (incinerator) 2, and both incinerators 1.2, and from each incinerator 1.2 A dust collector 3 for removing dust and the like in the supplied combustion exhaust gas. In the refuse incineration equipment according to the present embodiment, each of the

incinerators

1 and 2 is configured to be independently operable, and each of the

incinerators

1 and 2 can perform incineration processing independently. Further, in the refuse incinerator according to the present embodiment, dust contained in the combustion exhaust gas discharged from these

incinerators

1 and 2 is intensively removed by the dust collector 3. Since the first incinerator 1 and the second incinerator 2 have the same structure, the first incinerator 1 will be described below, and the same members of the second incinerator 2 will be assigned the same reference numerals and the description thereof will be omitted. I do.

The first incinerator 1 is based on an incinerator case 11 formed in a rectangular box shape that is horizontally long on the left and right. More specifically, the first incinerator 1 has a left end block 4, a right end block 5, and five intermediate blocks 6 disposed between these two blocks 4. The front combustion chamber 7 and the next combustion chamber 8 continuous with the same chamber 7 are provided inside the rectangular combustion chamber. The hearth 9 of the first-stage combustion chamber 7 is provided at a position higher than the hearth 10 of the next-stage combustion chamber 8, and the latter hearth 10 is provided stepwise with respect to the former hearth 9. (See FIG. 1). In this embodiment, the pre-combustion chamber 7 and the next-stage combustion chamber 8 may be simply referred to as a combustion chamber 101, and the hearth 9 of the pre-combustion chamber 7 and the hearth 10 of the next-stage combustion chamber 8 may be referred to. Is sometimes simply referred to as the hearth 102.

A first pusher 13 for feeding combustible waste combusted in the hearth 9 toward the next-stage combustion chamber 8 is provided inside the first-stage combustion chamber 7. A second pusher 14 that feeds toward the outlet 15 is provided. Ash outlets 15 are provided at three places before and after the end of the hearth 10 (see FIG. 4). Each of the

pushers

13 and 14 is configured by using

hydraulic cylinders

16 and 17 as a drive source and fixing

transfer blades

20 and 21 to tips of

piston rods

18 and 19, respectively. By intermittently reciprocating the

transfer blades

20 and 21 with the

hydraulic cylinders

16 and 17, combustible waste in the pre-combustion chamber 7 is sent to the next-stage combustion chamber 8 along the hearth 9 or the next-stage combustion is performed. The incinerated ash in the chamber 8 can be sent to the ash outlet 15 along the hearth 10.

At the end of the first incinerator 1 on the side of the pre-combustion chamber 7, there is provided a refuse inlet 24 for injecting combustible waste into the pre-combustion chamber 7, and the end wall 5 a of the end block 5 of the first incinerator 1 ( The end wall 5a) of the next stage combustion chamber 8 is provided with a discharge port 25 for combustion exhaust gas. The garbage inlets 24 are provided at two locations before and after the ceiling wall of the intermediate block 6 adjacent to the end block 4, and further, a combustion support burner 26 is provided on the rear wall of the block 6. The discharge ports 25 for the combustion exhaust gas are formed at five places before and after the end wall 5a corresponding to the dust collector 49 described later (see FIG. 4).

第 The first incinerator 1 is provided with an air supply device for supplying combustion air to the first-stage combustion chamber 7 and the second-stage combustion chamber 8. In FIG. 5, the air supply device includes a blower (blowing fan) 28 that is rotationally driven by a motor, a damper 29 that changes the destination of the combustion air that is pressurized and supplied by the blower 28, and the combustion air that is supplied to each combustion chamber 7. 8 (combustion chamber 101), two kinds of

air supply pipes

30 and 31, a pair of smoke exhaust nozzles 32 provided inside a chimney 57 described later, and an air supply passage 103 connecting these devices. Have. The

air supply pipes

30 and 31 include an upper area air supply pipe 30 that mainly supplies combustion air to the upper half of the combustion chamber 101 and a plurality of hearths that mainly supply combustion air to the vicinity of the hearth 102 of the combustion chamber 101. And an area air supply pipe 31. The damper 29 supplies all of the combustion air pressurized by the blower 28 to each of the

air supply pipes

30 and 31 and supplies most of the combustion air pressurized by the blower 28 to a pair of smoke exhaust nozzles 32. Can be switched to a state in which

According to the air supply device described above, by simply switching the damper 29, the combustion air supplied from the blower 28 is supplied to the

air supply pipes

30 and 31 or the combustion air supplied to the smoke exhaust nozzle 32. The pressure state of the

combustion chambers

7 and 8 can be suitably adjusted. Specifically, when all of the combustion air pressurized by the blower 28 is supplied to each of the

air supply pipes

30 and 31, the internal pressure of each of the

combustion chambers

7 and 8 is set to a pressure higher than the atmospheric pressure to burn the combustible waste. Can be promoted. In a state in which most of the combustion air pressurized by the blower 28 is sent to the pair of smoke exhaust nozzles 32, most of the combustion air is sent out from the smoke exhaust nozzle 32, and the combustion air is sent to each of the

air supply pipes

30 and 31. By reducing the feed rate of the incinerators, the pressure inside the

incinerators

1 and 2 can be reduced to a negative pressure to prevent the flame and the combustion gas from blowing out from the refuse inlet 24. In addition, since each

incinerator

1, 2 only needs to be provided with one air supply device, it is possible to eliminate the complexity of the air supply structure for each of the

incinerators

1, 2 and to reduce the

incinerator

1, 2 Introduction costs can be reduced.

As shown in FIG. 6, the upper area air supply pipe 30 in the pre-combustion chamber 7 includes a pipe main body 33 formed of a steel pipe or a cast pipe, and a flange 34 fixed to an upper end of the pipe main body 33. A group of flammable holes 35 are opened in the lower part of the main body 33, and the lower end of the pipe main body 33 is closed with a plug 104 made of castable refractory material. In this embodiment, as shown in FIG. 7, four bleed holes 35 are opened at equal intervals on the peripheral surface of the pipe main body 33, and a set of four bleed holes 35 is provided in a multistage (six stages). The fumaroles 35 of each stage are arranged in a staggered manner. Further, the pitch P1 above and below the fumarole holes 35 from the lower first stage to the third tier of the pipe main body 33 is changed to the adjacent pitch P4 above and below the fuze holes 35 from the lower fourth stage to the sixth tier below the pipe main body 33. By setting it smaller than P2, more combustion air is blown out from the lower end of the pipe main body 33 so that the lower end part of the pipe main body 33 can be effectively cooled. As described above, by cooling the lower end portion of the pipe main body 33, it is possible to prevent the lower end portion of the pipe main body 33, which is easily exposed to high temperature, from being overheated and quickly worn away. The plug 104 can be formed by arranging and fixing a thick metal plate excellent in heat resistance at the lower end of the tube main body 33.

The pre-combustion chamber 7 is provided with a total of six

air supply pipes

30 and 31, three of which are upper area air supply pipes 30, which pass through mounting holes provided in the ceiling wall of the pre-combustion chamber 7. Is inserted into the furnace. The remaining three are the hearth area air supply pipes 31, which are inserted from the upper opening of the fireproof cylinder 36 projecting downward from the ceiling wall of the pre-combustion chamber 7, and the flange 34 is fixed to the bottom wall of the fireproof cylinder 36. It is inserted into the furnace while being supported (see FIG. 6). The refractory cylinder 36 is formed of a castable refractory material and has a cylindrical shape, and the inner diameter thereof is set to be about three times the inner diameter of the pipe main body 33. Specifically, when the inner diameter of the pipe main body 33 and the air supply passage 103 was 73 mm, the inner diameter of the fireproof cylinder 36 was 220 mm. As described above, when the air supply passage 103 and the hearth area air supply pipe 31 are connected via the in-cylinder space 109 of the fire-resistant cylinder 36 having a larger cross-sectional area than these pipes, the inside of the fire-resistant cylinder 36 has a low temperature. Is filled with the combustion air, so that the upper part of the hearth area air supply pipe 31 can be cooled to prevent the pipe 31 from becoming high temperature. In addition, the replacement of the hearth area air supply pipe 31 can be performed smoothly and promptly by an amount corresponding to the large in-cylinder space 109.

The lower end of the upper area air supply pipe 30 attached to the ceiling wall of the pre-combustion chamber 7 is located at a height of about half of the vertical height of the pre-combustion chamber 7 and mainly located in the upper half of the pre-combustion chamber 7. It is blowing out combustion air. The lower end of the hearth area air supply pipe 31 attached to the fireproof cylinder 36 reaches the hearth 9 of the pre-combustion chamber 7, and mainly blows out combustion air to the vicinity of the hearth 9 of the pre-combustion chamber 7. . The upper opening of the fireproof cylinder 36 is exposed outside the ceiling wall and is closed by a flange 105 provided in the air supply passage 103. The structure and the vertical length of the pipe main body 33 of the upper area air supply pipe 30 and the pipe main body 33 of the hearth area air supply pipe 31 in the former combustion chamber 7 are the same. As described above, when each of the

air supply pipes

30 and 31 is formed by the pipe body 33 having the same structure and the same vertical length, two types of air supply pipes are prepared, and each of the air supply pipes is inserted into the furnace from the ceiling wall of the pre-combustion chamber 7. Compared to the case of projecting, only one kind of pipe main body 33 needs to be prepared, so that the cost of each of the

air supply pipes

30 and 31 can be reduced accordingly. Further, since the hearth area air supply pipe 31 is fixed to the bottom wall of the fireproof cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, the low temperature combustion air supplied to the fireproof cylinder 113 supplies the hearth area air supply pipe. The upper part of the trachea 31 can be cooled.

As shown in FIG. 2, the upper area air supply pipe 30 attached to the ceiling wall of the pre-combustion chamber 7 and the hearth area air supply pipe 31 attached to the fireproof cylinder 36 are arranged alternately in front and rear (staggered). Both

air supply pipes

30 and 31 are arranged so as to sandwich the advance-retreat trajectory of the transfer blade 20 (see FIG. 4). As described above, the upper area air supply pipes 30 are arranged in a zigzag manner with the advance-retreat trajectory of the transfer blade 20 interposed therebetween, and the lower end positions of the upper area air supply pipes 30 are made different, so that the pre-stage combustion chamber is formed. The inside of the combustion chamber 7 is evenly filled with the combustion air, and the combustion of the combustible waste in the combustion chamber 7 is promoted, so that the waste incineration can be effectively performed. The upper area air pipe 30 mounted on the ceiling wall and the hearth area air pipe 31 mounted on the fireproof cylinder 36 are provided only in front of and behind the two intermediate blocks 6 facing the pre-combustion chamber 7 and the end block 4. The

air supply pipes

30 and 31 are not provided in the intermediate block 6 in which the dust inlet 24 is formed.

In this example, the front-rear pitch between the upper area air supply pipe 30 and the hearth area air supply pipe 31 was set to be about twice the front-rear width of the transfer blade 20. As described above, when the front-rear pitch of the

air supply pipes

30 and 31 is set to be about twice the front-rear width of the transfer blade 20, when the combustible waste is sent by the transfer blade 20, the combustible waste is removed by the transfer blade 20. Even if it protrudes from the front and rear ends, the protrudable combustible waste can be prevented from hitting the lower end of the hearth area air supply pipe 31 reaching the hearth 9.

ホルダー A holder body 37 that covers the lower end of the hearth area air supply pipe 31 is provided on the hearth 9 of the pre-combustion chamber 7. The holder body 37 is a refractory wall 106 made of a ring-shaped refractory material (castable refractory material) bulging out on the hearth 9, and a holding hole 38 for receiving the lower end of the hearth area air supply pipe 31 is provided at the center thereof. Is formed. As described above, when the periphery of the lower end portion of the hearth area air supply pipe 31 is covered with the refractory wall 106 around the holding hole 38, the lower end of the hearth area air supply pipe 31 can be prevented from being exposed to high temperature and melted. Therefore, the frequency of replacement of the air supply pipe 31 can be reduced, and the interval at which the operation of the waste incineration equipment is stopped for replacing the hearth area air supply pipe 31 can be prolonged. In other words, the waste incineration equipment can be extended. Operation time can be extended. Furthermore, even if a part of the lower end of the hearth area air supply pipe 31 is partially melted, the plug 104 supported by the hearth 9 does not fall off, so that the combustion air is continuously blown out from the fumarole 35 and fed. The waste incineration can be continued, and the replacement frequency of the hearth area air supply pipe 31 can be further reduced. In addition, when a large amount of combustible waste is sent into the next-stage combustion chamber 8 by the transfer blade 20 of the first pusher 13, even if the combustible waste protruding from the transfer blade 20 collides with the hearth area air supply pipe 31, the furnace By preventing the floor area air supply pipe 31 from tilting, the hearth area air supply pipe 31 can be maintained in a vertical posture.

In the next-stage combustion chamber 8, an upper-area air supply pipe 30 and a hearth-area air supply pipe 31 are provided similarly to the preceding-stage combustion chamber 7. The upper area air supply pipe 30 of the next combustion chamber 8 includes a pipe main body 40 and a flange 41, similarly to the upper area air supply pipe 30 of the previous combustion chamber 7, and a group of blow holes 42 is provided at a lower part of the pipe main body 40. It is opened and the lower end of the tube main body 40 is closed with a plug 104. The arrangement pattern of the blast holes 42 and the relationship between the upper and lower adjacent pitches P1 and P2 of the blast holes 42 are the same as those of the blast holes 35 of the upper area air supply pipe 30 of the pre-stage combustion chamber 7. Also, more combustion air is blown out from the lower end of the pipe main body 40 to effectively cool the lower end of the pipe main body 40, and the lower end of the pipe main body 40 near the hearth 9 is overheated and worn. It is the same in that it is possible to solve the problem. The upper opening of the fireproof cylinder 43 is exposed outside the ceiling wall and is closed by a flange 105 provided in the air supply passage 103.

構造 The structure and the vertical length of the pipe body 40 of the upper area air supply pipe 30 and the pipe body 40 of the hearth area air supply pipe 31 in the next stage combustion chamber 8 are the same. As described above, when each of the

air supply pipes

30 and 31 is formed by the pipe main body 40 having the same structure and the same vertical length, two types of air supply pipes are prepared, and each air supply pipe is connected to the ceiling wall of the next-stage combustion chamber 8. Since it is sufficient to prepare one kind of pipe main body 40 as compared with the case where the pipes are protruded into the furnace, the costs of the

air supply pipes

30 and 31 can be reduced correspondingly. However, since the vertical height of the next combustion chamber 8 is larger than the vertical height of the previous combustion chamber 7, the vertical length of each of the

air supply pipes

30 and 31 of the next combustion chamber 8 is the same as that of the previous combustion chamber 7. The length is set to be larger than the vertical length of 30 and 31 (see FIG. 6).

The next combustion chamber 8 is provided with a total of four

air supply pipes

30 and 31, two of which are inserted into the furnace through the mounting holes provided in the ceiling wall of the next combustion chamber 8. The remaining two are inserted through the upper opening of the fireproof cylinder 43 projecting downward from the ceiling wall of the next stage combustion chamber 8, and the furnace 41 is fixed with the flange 41 fixed to the bottom wall of the fireproof cylinder 36. (See FIG. 6). The refractory cylinder 43 is formed of a castable refractory material in a cylindrical shape, and its upper opening is exposed outside the ceiling wall and is closed by a flange 105 provided in the air supply passage 103. The lower end of the upper area air supply pipe 30 attached to the ceiling wall of the next-stage combustion chamber 8 is located at a height that is approximately half the vertical height of the next-stage combustion chamber 8. Further, the lower end of the hearth area air supply pipe 31 attached to the fireproof tube 43 reaches the hearth 10 of the next-stage combustion chamber 8.

下端 The lower end of the hearth area air supply pipe 31 provided in the next stage combustion chamber 8 is covered with a holder body 44 formed of a ring-shaped refractory material (castable refractory material) bulging and formed on the hearth 10. In this manner, when the periphery of the lower end of the hearth area air supply pipe 31 is covered with the refractory wall 106 around the holding hole 45, the lower end of the hearth area air supply pipe 31 can be prevented from being exposed to high temperature and melted. Therefore, the frequency of replacement of the air supply pipe 31 can be reduced, and the interval at which the operation of the incinerator 1 is stopped for replacement of the hearth area air supply pipe 31 is prolonged, so that the operating time of the incinerator 1 is extended. be able to. Furthermore, even if a part of the lower end of the hearth area air supply pipe 31 is melted, the plug 104 supported by the hearth 10 does not fall off, so that the combustion air is continuously blown out from the fumarole 35 and fed. Thus, the waste incineration can be continued, and the replacement frequency of the hearth area air supply pipe 31 can be further reduced. Further, when a large amount of combustible waste and incinerated ash are sent to the ash discharge port 15 by the transfer blade 21 of the second pusher 14, the combustible waste and incinerated ash protruding from the transfer blade 21 collided with the hearth area air supply pipe 31. Also, the hearth area air supply pipe 31 is prevented from tilting, and is maintained in the vertical posture.

As shown in FIG. 2, the upper area air supply pipe 30 attached to the ceiling wall of the next-stage combustion chamber 8 and the hearth area air supply pipe 31 attached to the fireproof tube 43 are arranged alternately in front and rear (staggered). The two

air supply pipes

30 and 31 are arranged so as to sandwich the advance / retreat trajectory of the transfer blade 21 (see FIG. 4). As described above, the air-

supply pipes

30 and 31 are arranged in a staggered manner with the advancing-retreat trajectory of the transfer blade 21 interposed therebetween, and the lower end positions of the air-

supply pipes

30 and 31 are made different, so that the next stage combustion is performed. The inside of the chamber 8 is evenly filled with the combustion air, and the combustion of combustible waste in the next-stage combustion chamber 8 is promoted, so that the incineration of the waste can be performed effectively. The relationship between the front and rear pitches of the front and rear

air supply pipes

30 and 31 and the front and rear width of the transfer blade 21 was the same as the relation between the front and rear

air supply pipes

30 and 31 in the pre-combustion chamber 7. In the present embodiment, the steel pipe

main bodies

33 and 40 constituting the upper area air supply pipe 30 and the hearth area air supply pipe 31 may be simply referred to as the pipe main body 110, and the

flanges

34 and 41 and the

fumarole

35, 42,

fireproof cylinders

36, 43,

holder bodies

37, 44, and holding

holes

38, 45 may be collectively referred to simply as flange 111, fumarole 112, fireproof cylinder 113, holder body 114, and holding hole 115.

耐熱 Below the ash discharge port 15, a heat-resistant conveyor (incineration ash transfer device) 46 for transferring incinerated ash dropped from the ash discharge port 15 to the front (outer surface) of the first incinerator 1 is provided. The heat-resistant conveyor 46 is started in a state where the temperature of the incinerated ash is lowered, receives the incinerated ash by a conveyor belt, transfers it to the front of the first incinerator 1, and puts it into a container (not shown).

1 and 4, the dust collecting device 3 has a multi-cyclone structure including a square box-shaped dust collecting case 48 having four side surfaces and a total of 10 dust collectors 49 accommodated in the dust collecting case 48. Have been. The first incinerator 1 and the second incinerator 2 are based on an incinerator case 11 formed in a rectangular box shape, and are connected in such a manner that the end walls 5 a thereof are in contact with the left and right side surfaces of the dust collecting case 48. I have. Five of the ten dust collectors 49 are dust collectors 49 for the first incinerator 1, and the remaining five dust collectors 49 are dust collectors 49 for the second incinerator 2. At the upper part of the dust collecting case 48, there is provided a smoke exhausting chamber 50 for collecting dust and smoke exhausted from the dust collector 49. The end walls 5a of the

incinerators

1 and 2 are connected to the left and right opposed side surfaces of the dust collecting case 48, and the dust collectors 49 for the first incinerator 1 are arranged along the left side surface, and the right side. A dust collector 49 for the second incinerator 2 is arranged along the surface. Each of the dust collectors 49 includes an outer cylinder 52 having a downwardly discharging exhaust port 51, a smoke exhaust pipe 53 penetrating vertically through the upper wall of the outer cylinder 52, and an upper opening opening in the smoke exhaust chamber 50. , And an inlet cylinder 54 connected to the discharge port 25. The flue gas introduced from the inlet tube 54 causes dust such as dust in the flue gas to drop toward the dust discharge port 51 while turning around the flue gas tube 53, and only the flue gas after dust removal is discharged from the flue gas tube 53. It is sent to the room 50. The lower part of the dust outlet 51 faces the dust chamber 55 defined below the dust collecting case 48. Dust and the like accumulated in the dust chamber 55 can be taken out from a scraper (not shown). As shown in FIG. 5, a flue 56 is led out of the rear part of the flue gas chamber 50 and connected to a chimney 57. Reference numeral 58 denotes an emergency exhaust stack branched off from the flue 56.

As described above, according to the dust collector 49 having the multi-cyclone structure, it is not necessary to provide a movable part in the dust collector 49, so that the structure of the dust collector can be simplified, and the dust collector can be configured at low cost. The total cost of the waste incineration equipment can be reduced by a corresponding amount. In addition, the discharge ports 25 are generated in the front-stage combustion chamber 7 and the next-stage combustion chamber 8 formed at five places on the end wall 5a of each of the incinerators 1.2 corresponding to the five dust collectors 49. The entire amount of the combustion exhaust gas thus discharged can be reliably sent from each exhaust port 25 to the corresponding dust collector 49 so that dust can be accurately removed. Furthermore, since the discharge port 25 and the inlet tube 54 of the dust collector 49 can be communicated simply by directly connecting the end wall 5a of each incinerator 1.2 to the dust collector 3, the incinerators 1.2 can be collected. There is also an advantage that labor and time when connecting to the dust device 3 can be saved.

Fig. 8 shows the detailed structure of the refuse inlet 24. The refuse input port 24 includes a refuse receiving chute 61 fixed to an outer surface of a refuse entrance 66 on a ceiling wall of the pre-combustion chamber 7, a rotary drum 62 arranged in the upper and lower portions of the refuse receiving chute 61, and a rotary drum 62. And a flame-shielding damper 65 that opens and closes an outlet 64 of the dust-receiving chute 61. The rotary drum 62 is formed of a cylindrical drum having a dust receiving opening 67 opened on the upper surface, and its peripheral surface is rotatably supported by a pair of partially arc-shaped drum supporting walls 68 provided on the dust receiving chute 61. ing. The rotary drum 62 is reciprocatingly rotated by a drum drive structure 69 provided on the rear surface of the dust receiving chute 61, so that the dust receiving opening 67 opens toward the dust receiving hopper 63 (the state shown in FIG. 8). The waste receiving position can be switched to the waste dropping posture (the state shown in FIG. 9) in which the waste receiving opening 67 opens toward the outlet 64. Further, the flame-shielding damper 65 is opened and closed by a damper drive structure (not shown) to open and communicate the outlet 64 with the garbage port 66 (the state shown in FIG. 9). It can be switched to a blocking posture (a state shown in FIG. 8) for blocking the space.

A crane device 71 is provided on the ceiling of the building for transferring combustible waste accumulated in a waste pit (not shown) to the waste inlet 24 of the first incinerator 1 and the second incinerator 2. The crane device 71 includes a pair of traveling rails 72 fixed to beams of the building, a pair of saddles 73 that reciprocate left and right on the traveling rails 72, a girder 74 fixed and supported between the saddles 73, and a girder 74. It is composed of a traveling cart 75 that reciprocates on the front and back, a grab bucket 77 that is moved up and down by a hoisting device 76 provided on the cart 75, and the like. The traveling cart 75 and the grab bucket 77 move between each of the waste input ports 24 and the waste pit, and the combustible waste accumulated in the waste pit is grasped by the grab bucket 77 and transported to each of the

waste input ports

24 and 24. And put it in.

When the combustible waste grasped by the grab bucket 77 is thrown into the waste inlet 24, the rotary drum 62 is set to the dust receiving position as shown in FIG. Drop inside. Next, the flame-shielding damper 65, which has been in the blocking position, is raised and switched to the open position, and in this state, the rotary drum 62 is rotated clockwise toward the dust-dropping position. When the rotary drum 62 rotates from the dust receiving position, the space between the lower ends of the pair of drum support walls 68 is closed by the peripheral wall of the rotary drum 62. In addition, when the combustible waste is charged, the amount of combustion air supplied to each of the

air supply pipes

30 and 31 is reduced, and most of the combustion air is sent out from the smoke exhaust nozzle 32. Negative pressure can be maintained. Therefore, the flame and the combustion gas in the pre-combustion chamber 7 do not blow out from the refuse inlet 24.

When the rotary drum 62 is rotated slightly more than 90 degrees from the dust receiving position, one end of the dust receiving port 67 goes to the outlet 64 beyond the lower end of the drum support wall 68, and the combustible waste in the rotary drum 62 is removed. It starts to fall gradually from the receiving port 67. Then, when the rotary drum 62 rotates about 180 degrees from the dust receiving position, the entire dust receiving port 67 opens toward the outlet 64, so that all of the combustible waste in the rotary drum 62 is transferred to the outlet 64 and the dust inlet 66. Can be dropped into the pre-combustion chamber 7. Thereafter, the rotary drum 62 is returned to the dust receiving position while the flame or the combustion gas is prevented from flowing back into the dust receiving chute 61 by tilting the flame shielding damper 65 back to the shutting position.

The left and right length from the end of the first incinerator 1 to the end of the second incinerator 2 is 16 m, the front and rear length of each incinerator 1.2 is 2400 mm, It is a medium-sized waste incinerator with a height of 2100 mm, and the installation area per incinerator is 38.4 square meters. The incineration capacity of each incinerator 1.2 for combustible waste is 5 tons / Hr per unit. Therefore, the incineration capacity when the refuse incineration equipment is operated continuously for 8 hours is (5 tons × 2 units × 8 hours = 80 tons). This is 240 tons / day in terms of incineration capacity when the refuse incineration facility is operated continuously for 24 hours at full capacity, and can exhibit an incineration capacity comparable to a large refuse incineration facility. However, in many cases, the waste incinerator is operated for only 8 to 16 hours, so the waste incinerator according to the present embodiment is a relatively small municipal government with a population of tens of thousands to hundreds of thousands. It can be a medium-scale refuse incineration facility suitable for use. Incidentally, while the cost of introducing a large conventional incineration facility is several billion yen or more, the total cost of introducing the waste incineration equipment described in this embodiment is 300 to 400 million yen, which is 10 minutes. It can be said that the waste incineration facility is suitable for municipalities with a relatively small population.

Next, the outline of the procedure for incinerating combustible waste with the waste incineration equipment will be explained. When incinerating combustible waste, dry paper or cardboard having a low ignition temperature is put into the pre-combustion chamber 7 and ignited. After the flame spreads, the blower 28 is started to activate each of the

air supply pipes

30 and 31. Blow out combustion air from In this state, a predetermined amount of combustible waste is thrown into the pre-combustion chamber 7 through the waste inlet 24 of each of the

incinerators

1 and 2 for incineration. At this time, pressurized combustion air is blown out and sent from each air supply pipe 30/31 toward combustible waste inside each incinerator 1/2, and the incineration is performed by the self-combustion action of the ignited combustible waste. Therefore, the operating cost can be significantly reduced as compared with a conventional incinerator which always operates a burner to incinerate waste. Exceptionally, when flame-retardant combustible waste having a water content of 80% or more is continuously supplied throughout the day, the auxiliary burner 26 is operated to assist the combustion of the combustible waste. Is supplied in a state where flammable combustible waste and flammable combustible waste having a low water content are mixed, so that there is no need to operate the auxiliary burner 26, and refuse incineration can be performed only by the self-combustion action of the combustible waste. . Therefore, fuel consumption can be greatly reduced. Each combustible waste is additionally charged at intervals of 15 minutes by 1.5 cubic meters, and is dried and incinerated by the heat of combustion of the combustible waste previously charged.

可 Since the combustible waste introduced into the pre-combustion chamber 7 burns from its surface, the combustible waste on the side near the hearth 9 receives combustion heat and dries to some extent but does not burn. The combustible waste in such a state is intermittently sent toward the next combustion chamber 8 by the transfer blade 20 of the first pusher 13, so that the combustible waste in the middle of combustion and the unburnable waste near the hearth 9 are removed from the furnace. Dropping and stirring from the end of the bed 9 promotes drying and burning of the unburned refuse, so that the entire combustible refuse can be effectively burned in a shorter time. Further, since the combustion air is continuously supplied to the next-stage combustion chamber 8 from the

air supply pipes

30 and 31, the concentration of the combustion air inside the next-stage combustion chamber 8 can be maintained at a high level. During the incineration of the refuse, the interior of the next-stage combustion chamber 8 is exposed to a high temperature of about 850 ° C. due to radiant heat of the ceiling, the hearth 10, and the inner peripheral wall of the furnace. Therefore, it is possible to prevent the generation of dioxins by completely burning the previously unburned waste, and it is possible to reliably prevent harmful substances from being discharged into the atmosphere.

(4) The combustion ash deposited on the hearth 10 of the next stage combustion chamber 8 is completely burned by being exposed to a high temperature of about 850 ° C., and becomes charcoal gray or white powdery ash with low bulk. Therefore, the remaining ash (burning loss) for combustible waste introduced into the pre-combustion chamber 7 is only about 0.6%. For example, when incineration work is performed for a certain period of time per day (for example, 8 hours). Does not require ashing work at the end of incineration. The ash removal operation may be performed by operating the second pusher 14 and the heat-resistant conveyor 46 before the incineration operation on the next day when the furnace temperature is sufficiently lowered. Incidentally, the amount of ash remaining in conventional incineration facilities having the same amount of waste incineration per day can reach as much as about 15%, so that it is often necessary to carry out ash extraction work consecutively with incineration work.

In the refuse incineration equipment according to the present embodiment, the dust collecting case 48 constituting the dust collecting device 3 is formed in a rectangular box shape having four side surfaces, and the

incinerators

1 and 2 are provided on the left and right side surfaces of the dust collecting case 48. Connected. In addition, in the refuse incinerator of this embodiment, the

incinerators

1 and 2 are operated independently to incinerate the refuse introduced into the refuse inlet 24 of each of the

incinerators

1 and 2. The dust collecting device 3 can collectively remove dust contained in the combustion exhaust gas discharged from the

fuel cell

1 and 2. According to the refuse incinerator according to the present embodiment having the above-described configuration, a plurality of

incinerators

1 and 2 can be operated independently. 2. It is easier to double the amount of refuse incinerated than conventional incinerators in which two incinerators are operated alternately, and it is possible to significantly improve the incineration capacity. Further, since the combustion exhaust gas sent from each of the

incinerators

1 and 2 can be collectively processed by one dust collector 3, the overall structure of the incinerator can be simplified, and the manufacturing cost and the operating cost can be reduced. In the

incinerators

1, 2, the end wall 5a located on the other end side of the incinerator case 11 is in contact with the side surface of the dust collection case 48, and the discharge port 25 provided in the incinerator case 11 is connected to the dust collector 49. Since the

incinerators

1 and 2 and the dust collector 3 are separately installed because they communicate with the inlet cylinder 54, compared to a configuration in which the two are connected by a flue made of pipes such as pipes. In addition, the length of the flue from the incinerators 1.2 to the dust collector 49 can be shortened, so that there is no need for a large attraction capacity for guiding the combustion exhaust gas from the incinerators 1.2 to the dust collector 49, and The structure of the incinerator can be simplified, and the manufacturing cost of the waste incinerator can be reduced.

The hearth 10 of the next-stage combustion chamber 8 is provided in a stepped manner with respect to the hearth 9 of the first-stage combustion chamber 7, and combustible waste is transferred to the next-stage combustion chamber 8 along the hearth 9 in the first-stage combustion chamber 7. And a first pusher 13 for intermittently feeding. According to such an incinerator, the combustible waste on the hearth 9 of the pre-combustion chamber 7 is intermittently sent toward the next-combustion chamber 8 by the transfer blade 20 of the first pusher 13 and dropped, thereby making the combustible waste. The unburned refuse in the refuse is stirred and exposed to the surface of the refuse lump, and can be dried and burned effectively in the next-stage combustion chamber 8. In addition, since the first pusher 13 and the second pusher 14 intermittently feed combustible waste and incinerated ash, the push stroke of each pusher 13/14 needs to be at most 2.5 m from the standby position, The pushing operation of the

pushers

13 and 14 can be performed in a stable state, and the pushing strokes of the

pushers

13 and 14 are set to be equal to the left and right lengths of the hearth 9. There is also an advantage that the overall cost of the system can be reduced.

In the first incinerator 1 and the second incinerator 2, each end wall 5a of the next combustion chamber 8 provided with the discharge port 25 is connected to a case wall facing the left and right of the dust collecting case 48. The first incinerator 1, the dust collector 3, and the second incinerator 2 are integrated in a straight line. According to such an incinerator, the entire structure of the refuse incinerator can be simplified, and the space required for its installation can be reduced. Therefore, it is not necessary to secure a vast site when introducing the refuse incineration equipment, and it is possible to easily construct the refuse incineration equipment even in, for example, an open ground in a mountainous area.

A crane device 71 for transporting combustible waste is arranged above each incinerator 1.2, and the incinerated ash dropped from the ash outlet 15 is transferred below the ash outlet 15 to the front of each incinerator 1.2. Since the heat-resistant conveyor 46 is provided, it is possible to automatically inject combustible waste into each of the

incinerators

1 and 2 and to take out the incinerated ash dropped from the ash discharge port 15, thereby reducing the burden on the workers involved in the incineration of waste. It can reduce and improve safety.

Each of the

incinerators

1 and 2 is configured as a sectional structural furnace with an end block 4, an end block 5, and five intermediate blocks 6 arranged between the two blocks 4.5. A garbage incineration facility can be constructed in a short time only by transporting the manufactured

blocks

4, 5, and 6 to the construction site and assembling them. In addition, even in the existing incinerator, the incineration capacity of the incinerator can be enhanced by adding the intermediate block 6. Further, there is an advantage that the incinerator can be restored in a short time without the need to stop the operation of the incinerator for a long period of time, for example, the repair of the incinerator can be completed only by replacing the damaged block. Even when it is necessary to stop the operation of one of the

incinerators

1 and 2 for the occurrence of a failure or maintenance, there is an advantage that the other incinerator can be operated to incinerate the waste.

Further, in the above waste incineration equipment, a total of ten

air supply pipes

30 and 31 for supplying combustion air to the combustion chamber 101 are alternately arranged before and after the ceiling wall of the end block 4 and the intermediate block 6. As a result, the combustion air can be evenly supplied to every corner inside the combustion chamber 101, and the combustible waste can be effectively incinerated. In addition, since the pipe ends of the

air supply pipes

30 and 31 face outside the feed trajectories of the first pusher 13 and the second pusher 14, the combustible waste is moved by the first pusher 13 or the incinerated ash is removed. When moving with the two pushers 14, the combustion air is uniformly sent to the first-stage combustion chamber 7 and the second-stage combustion chamber 8 while reliably preventing combustible dust and incineration ash from hitting the end of the hearth area air supply pipe 31. To promote the combustion of combustible and unburned waste during combustion.

Further, since the refuse inlet 24 is formed before and after the ceiling wall of the intermediate block 6 adjacent to the end block 4, the refuse lump shape of the combustible refuse introduced into the pre-combustion chamber 7 from the refuse inlet 24 is introduced. Immediately below the mouth 24, it can be shaped like a mountain to increase its surface area. Therefore, drying and burning of combustible waste can be promoted by an amount corresponding to the large surface area of the refuse lump, and the time required for incineration can be reduced. Incidentally, when combustible waste is thrown into the corner between the inner surface of the end block 4 and the hearth 9, the lump is deposited so as to fill the corner, so that the surface area of the lump becomes small.

Since the refuse input port 24 is constituted by the dust receiving chute 61, the rotary drum 62, and the flame-insulating damper 65 for opening and closing the outlet 64 of the dust-receiving chute 61, the postures of the rotary drum 62 and the flame-insulating damper 65 are changed. When the combustible waste is dropped into the pre-combustion chamber 7 by switching alternately, it is ensured that the flame or the combustion gas in the pre-combustion chamber 7 tries to blow out from the refuse inlet 24 by the rotary drum 62 or the flame-insulating damper 65. Can be prevented. Therefore, the combustible waste can be charged into the pre-combustion chamber 7 in a safe state, and the high-temperature combustion gas can be reliably prevented from being discharged outside the furnace to lower the temperature inside the furnace.

An air supply device, a blower 28, a plurality of upper area air pipes 30 for supplying combustion air mainly to the upper half of the combustion chamber 101, and a supply of combustion air mainly to the vicinity of the hearth 102 of the combustion chamber 101. And a plurality of hearth area air supply pipes 31. Further, the lower end of the upper area air supply pipe 30 is located near the center of the vertical height of the combustion chamber 101, and the lower end of the hearth area air supply pipe 31 is assumed to reach the hearth 102 of the combustion chamber 101, and the lower end of The periphery was covered with a holder body 114 made of a refractory material provided on the hearth 102. According to such a waste incineration facility, the inside of the combustion chamber 101 can be evenly filled with combustion air. Further, since the lower end of the hearth area air supply pipe 31 is made to reach the hearth 102, the combustion air discharged from the lower part of the hearth area air supply pipe 31 is surely combustible waste burning near the hearth 102. To combustible waste in the combustion chamber 101, thereby effectively burning the combustible waste in a shorter time. Furthermore, since the lower end of the hearth area air supply pipe 31 is covered with the holder body 114 made of a refractory material, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperatures and melted. Therefore, the replacement frequency of the air supply pipe 31 is reduced, and the operating cost of the waste incineration equipment can be reduced accordingly.

(Example 2)
FIG. 10 shows a refuse incineration facility according to the second embodiment. There, the incinerator 1 and the dust collector 3 constitute a refuse incineration facility, and a total of ten

air supply pipes

30 and 31 are provided in each of the first and second combustion chambers 7.8. The structures of the incinerator 1 and the dust collecting device 3 are the same as those of the incinerator 1 and the dust collecting device 3 described in the first embodiment. As can be seen from this embodiment, the refuse incineration plant need not be equipped with multiple incinerators. Further, the combustion chamber 101 does not need to be composed of the preceding combustion chamber 7 and the next combustion chamber 8, and a single combustion chamber may be provided inside the incinerator 1.

In the above embodiment, a total of ten dust collectors 49 are provided inside the dust collecting case 48. However, for example, only five dust collectors 49 are provided, and the peripheral surface of the dust collector 49 for the first incinerator 1 is provided. An inlet tube 54 and an inlet tube 54 for the second incinerator 2 may be provided.

1 first incinerator (incinerator)
2 Second incinerator (incinerator)
Reference Signs List 3 Dust collector 4 End block 5 End block 6 Intermediate block 7 Precombustion chamber 8 Next combustion chamber 9 Hearth of previous combustion chamber 10 Hearth of next combustion chamber 13 First pusher 14 Second pusher 20 Transfer blade 21 Transfer blade 24 Garbage inlet 28 Blower 30 Upper area air supply pipe 31 Hearth area air supply pipe 101 Combustion chamber (general term for former combustion chamber 7 and next combustion chamber 8)
102 Hearth (collective name of hearth 9 of the first combustion chamber and hearth 10 of the next combustion chamber)
103 air supply passage 106 fireproof wall 109 in-cylinder space 110 pipe main body (general term for pipe main body 33 and pipe main body 40)
112 fumarole (collective name of fumarole 35 and fumarole 42)
113 fireproof cylinder (generic term for fireproof cylinder 36 and fireproof cylinder 43)
114 Holder body (general term for holder body 37 and holder body 44)
115 Holding hole (general term for holding hole 38 and holding hole 45)
P1 Adjacent pitch of fumarole P2 Adjacent pitch of fumarole

Claims

An incinerator (1) having a refuse inlet (24), a dust collector (3) connected to the incinerator (1) for removing dust in combustion exhaust gas, and a combustion chamber of the incinerator (1) (101) is provided with an air supply device for supplying combustion air,
The air supply device includes a blower (28) for supplying combustion air under pressure, and a plurality of upper area air supply pipes for supplying the combustion air supplied from the blower (28) to the upper half of the combustion chamber (101). (30), and a plurality of hearth area air supply pipes (31) for feeding the combustion air fed from the blower (28) to the vicinity of the hearth (102) of the combustion chamber (101),
The upper area air supply pipe (30) and the hearth area air supply pipe (31) are formed by a steel pipe main body (110) having a lower end closed and a group of blow holes (112) opened in the lower peripheral surface. Has been
The lower end of the upper area air pipe (30) is located near the center of the vertical height of the combustion chamber (101),
The lower end of the hearth area air pipe (31) reaches the hearth (102) of the combustion chamber (101),
A refuse incineration facility characterized in that the periphery of the lower end of the hearth area air pipe (31) is covered with a holder body (114) made of refractory material provided on the hearth (102).
The upper area air pipe (30) and the hearth area air pipe (31) are formed of a steel pipe body (110) having the same structure and the same vertical length,
The upper area air pipe (30) is fixed to the ceiling wall of the combustion chamber (101), and the lower end of the pipe body (110) is located near the center of the vertical height of the combustion chamber (101).
The hearth area air pipe (31) is fixed to the bottom wall of the fireproof cylinder (113) projecting downward from the ceiling wall of the combustion chamber (101), and the lower end of the pipe body (110) is connected to the hearth (102). 2. The refuse incineration plant according to claim 1, wherein
A holder body (114) is formed of a ring-shaped refractory material bulged on the hearth (102), and has a holding hole (115) at the center thereof for holding a lower end of the hearth area air supply pipe (31). Is formed,
The refuse incineration plant according to claim 1 or 2, wherein a fireproof wall (106) around the holding hole (115) covers a periphery of a lower end portion of the hearth area air supply pipe (31).
The upper opening of the fireproof cylinder (113) is exposed outside the ceiling wall of the combustion chamber (101) and is connected to an air supply passage (103) for supplying combustion air.
The refuse according to claim 2, wherein the air supply passage (103) and the hearth area air supply pipe (31) are connected via an in-cylinder space (109) of a refractory tube (113) having a larger sectional area than those passages. Incineration equipment.
Fumaroles (112) are formed at a plurality of locations in the circumferential direction below the pipe body (110) at equal intervals and in multiple stages in the up-down direction. And
In the formation region of the fumarole (112), the upper and lower adjacent pitches (P1) of the fumarole (112) formed on the lower half side are the upper and lower adjacent pitches of the fumarole (112) formed on the upper half side. The refuse incineration plant according to any one of claims 2 to 4, which is set to be smaller than (P2).
An incinerator (1) comprises an end block (4), an end block (5) connected to a dust collector (3), and a plurality of intermediate blocks (4, 5) arranged between the blocks (4.5). 6) is connected to
When the length direction of the incinerator (1), which is the connection direction of these blocks (4, 5, 6), is defined as the left-right direction, and the direction orthogonal to the left-right direction is defined as the front-rear direction, the end block (4) The refuse incineration plant according to any one of claims 2 to 5, wherein upper area air pipes (30) and hearth area air pipes (31) are alternately arranged before and after the intermediate block (6).
The combustion chamber (101) includes a first-stage combustion chamber (7) facing the waste inlet (24) and a next-stage combustion chamber (8) continuous with the combustion chamber (7). ) Is provided in a stepped manner with respect to the hearth (9) of the pre-combustion chamber (7),
The hearth (10) of the next-stage combustion chamber (8) is provided with an ash discharge port (15) for dropping and discharging incinerated ash out of the combustion chamber (101).
A first pusher (13) for intermittently sending combustible waste burning in the first-stage combustion chamber (7) toward the next-stage combustion chamber (8) is provided inside the first-stage combustion chamber (7),
A second pusher (14) for intermittently sending incineration ash in the next combustion chamber (8) toward the ash discharge port (15) is provided inside the next combustion chamber (8),
A plurality of upper area air pipes (30) and a plurality of hearth area air pipes (31) are provided in each of the preceding combustion chamber (7) and the next combustion chamber (8),
A plurality of upper area air pipes (30) and a plurality of hearth area air pipes (31) are advanced by the transfer blade (20) of the first pusher (13) and the transfer blade (21) of the second pusher (14). The refuse incineration plant according to claim 6, wherein the refuse trajectory is disposed so as to sandwich the trajectory back and forth.