JP6923209B2 - Garbage incinerator - Google Patents

Description

The present invention relates to a waste incineration facility that incinerates combustible waste in a combustion chamber while supplying pressurized combustion air from a plurality of air supply pipes fixed to an incinerator to a combustion chamber.

In the field of waste incinerator, Patent Document 1 discloses that an air supply pipe for supplying pressurized combustion air to a combustion chamber is provided. The incinerator described in Patent Document 1 is composed of 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. NS. The inside of the incinerator is divided into an upper combustion chamber and a lower ash chamber by a rostrum provided on the hearth. A pair of front and rear air supply tubes are fixed to each of the inlet block and the flue port block, and each air supply tube is inserted into the combustion chamber while penetrating the ceiling wall of each block, and the lower end is the rostrum. It faces upward. A group of fumaroles are formed at regular intervals on the peripheral surface of the air supply pipe facing the combustion chamber. A pair of front and rear cyclone type dust collectors are arranged inside the exhaust device connected to the flue mouth block.

Special Fair 07-056371 Gazette

In the incinerator of Patent Document 1, a group of fumaroles are formed at regular intervals on the peripheral surface of the air supply pipe facing the combustion chamber. Therefore, most of the combustion air supplied under pressure 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 tube is located in the upper part near the rostrum, and is easily exposed to high-temperature heat. Therefore, it is unavoidable that the lower part of the air supply tube is overheated and melted at an early stage, and it is necessary to replace the air supply tube frequently. In addition, the combustion air discharged from the lower part of the air supply pipe does not easily reach the combustible waste burning near the hearth, and it takes a lot of time to completely burn the combustible waste.

An object of the present invention is to prevent the lower part of the air supply pipe from being overheated and melted at an early stage to reduce the frequency of replacement of the air supply pipe, and further, the combustion air released from the lower part of the air supply pipe is brought into the vicinity of the hearth. The purpose is to provide a waste incineration facility that can reliably feed combustible waste that is being burned in Japan and incinerate combustible waste in a shorter time.

The waste incinerator of the present invention burns in an incinerator 1 provided with a waste inlet 24, a dust collector 3 connected to the incinerator 1 to remove dust in the combustion exhaust gas, and a combustion chamber 101 of the incinerator 1. It is equipped with an air supply device that supplies air. The air supply device includes a blower 28 that pressurizes and supplies combustion air, a plurality of upper area air supply pipes 30 that supply combustion air supplied from the blower 28 to the upper half of the combustion chamber 101, and a blower 28. It is provided with a plurality of hearth area air supply pipes 31 that supply the combustion air supplied from the combustion chamber 101 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 body 110 whose lower end is closed and a group of fumaroles 112 are 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. 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 pipe body 110 made of a steel pipe 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 the refractory cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, and the lower end of the pipe body 110 reaches the hearth 102.

The holder body 114 is formed of a ring-shaped refractory material bulging on the hearth 102, and a holding hole 115 for holding the lower end of the hearth area air supply pipe 31 is formed in the center thereof. A refractory wall 106 around the holding hole 115 covers the periphery of the lower end of the hearth area air supply pipe 31.

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

The fumaroles 112 are formed at a plurality of locations in the circumferential direction of the lower portion of the pipe body 110 at equal intervals and in a multi-stage shape in the vertical direction, and the fumaroles 112 in each stage are adjacent to each other in a staggered manner. Of the fumarole 112 forming regions, the upper and lower adjacent pitches P1 of the fumaroles 112 formed on the lower half side are set smaller than the upper and lower adjacent pitches P2 of the fumaroles 112 formed on the upper half side.

The incinerator 1 is configured by connecting an end block 4, an end block 5 connected to a dust collector 3, and a plurality of intermediate blocks 6 arranged between the blocks 4 and 5. When the length direction of the incinerator 1 which is the connection direction of these 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 end block 4 and the intermediate block 6 are before and after. The upper area air supply pipe 30 and the hearth area air supply pipe 31 are alternately arranged.

The combustion chamber 101 includes a front-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 next-stage combustion chamber 8 is the front-stage combustion chamber 7. It is provided in a stepped-down shape with respect to the hearth 9. The hearth 10 of the next-stage combustion chamber 8 is provided with an ash discharge port 15 for dropping and discharging incinerator ash to the outside of the combustion chamber 101. A first pusher 13 that intermittently sends 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 that intermittently feeds the incinerated ash in the next-stage combustion chamber 8 toward the ash discharge port 15 is provided inside the next-stage combustion chamber 8. Each of the first-stage combustion chamber 7 and the second-stage combustion chamber 8 is provided with a plurality of upper area air supply pipes 30 and a plurality of hearth area air supply pipes 31. A plurality of upper area air supply pipes 30 and a plurality of hearth area air supply pipes 31 are arranged with the transfer blade 20 of the first pusher 13 and the transfer blade 21 of the second pusher 14 sandwiching the advance-retract trajectory in the front-rear direction. ing.

In the waste incinerator of the present invention, the air supply device includes a blower 28, a plurality of upper area air supply pipes 30, and a plurality of hearth area air supply pipes 31. Further, it is assumed that 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. The periphery of the furnace was covered with a holder body 114 made of a fireproof material provided on the hearth 102.

According to the waste incinerator configured as described above, the upper area air supply pipe 30 and the hearth area air supply pipe 31 can evenly fill the inside of the combustion chamber 101 with combustion air. Further, since the lower end of the hearth area air supply pipe 31 reaches the hearth 102, the combustion air discharged from the lower part of the hearth area air supply pipe 31 is surely made into combustible waste burning in the vicinity of the hearth 102. The combustible waste can be effectively incinerated in the combustion chamber 101, and the combustible waste can be incinerated in a shorter time. Further, 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 a high temperature and being 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 incinerator is stopped due to the replacement of the hearth area air supply pipe 31 can be prolonged. In other words, the waste incinerator equipment can be replaced. Since the operating time of the waste can be lengthened, the operating cost of the waste incinerator can be reduced accordingly.

The upper area air supply pipe 30 and the hearth area air supply pipe 31 are formed of a pipe body 110 made of steel pipe having the same structure and vertical length, and the hearth area air supply pipe 31 is fixed to the bottom wall of the fireproof cylinder 113 and is a pipe. The lower end of the main body 110 reaches the hearth 102. When each of the air supply pipes 30 and 31 is formed of a pipe body 110 having the same structure and vertical length in this way, two types of air supply pipes, long and short, are prepared and each air supply pipe is connected from the ceiling wall of each combustion chamber 101. Since it is sufficient to prepare one type of pipe main body 110 as compared with the case of projecting into the furnace, 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 refractory cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, the low temperature combustion air supplied to the refractory cylinder 113 is used to feed the hearth area. 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 the lower end of the hearth area air supply pipe 31 is formed in the center thereof. By covering the periphery of the lower end of the hearth area air supply pipe 31 with the refractory wall 106 around the holding hole 115 in this way, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperatures and melting. .. Therefore, the frequency of replacement of the hearth area air supply pipe 31 can be further reduced.

The air supply passage 103 connected to the upper opening of the refractory cylinder 113 and the hearth area air supply pipe 31 are connected via the in-cylinder space 109 of the refractory cylinder 36 having a larger cross-sectional area than these passages. According to such an air supply structure, since the inside of the refractory cylinder 36 is filled with low-temperature combustion air, it is possible to cool the upper part of the hearth area air supply pipe 31 and prevent the pipe 31 from becoming hot. Further, since the in-cylinder space 109 is large, the replacement work of the hearth area air supply pipe 31 can be performed smoothly and quickly.

Of the fumarole 112 forming regions, the upper and lower adjacent pitches P1 of the fumaroles 112 formed on the lower half side are set smaller than the upper and lower adjacent pitches P2 of the fumaroles 112 formed on the upper half side. .. According to such an air supply structure, more combustion air can be blown out from the lower end of the pipe body 110 to effectively cool the lower end portion of the pipe body 110, so that the lower end portion of the pipe body 110 which is easily exposed to high temperature is overheated. Therefore, it can be well prevented from being worn out at an early stage.

The incinerator 1 is configured by connecting the end block 4, the end block 5, and a plurality of intermediate blocks 6 arranged between the blocks 4 and 5. According to such a waste incinerator, each block 4, 5, 6 manufactured at the factory can be transported to the construction site for assembly, and the cost required for manufacturing and transporting each block 4, 5, 6 can be reduced. Waste incinerators can be built in a shorter period of time. Further, since the upper area air supply pipe 30 and the hearth area air supply pipe 31 are alternately arranged before and after the end block 4 and the intermediate block 6, the combustion air is evenly supplied to every corner inside the combustion chamber 101. , Combustible waste can be incinerated more effectively.

The combustion chamber 101 is composed of 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 step-down manner with respect to the hearth 9 of the front-stage combustion chamber 7. Further, a first pusher 13 is provided inside the first-stage combustion chamber 7, and a second pusher 14 is provided inside the next-stage combustion chamber 8, so that combustible waste and incineration ash are intermittently sent by the pushers 13 and 14. I made it. According to such an incinerator, combustible waste on the hearth 9 of the first-stage 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, thereby causing combustible waste. The unburned waste inside can be agitated and exposed on the surface of the waste lump, and 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 stage combustion chamber 7 and the next stage combustion chamber 8, and the air supply pipes 30 and 31 are transferred to the transfer blades of the pushers 13 and 14. 20.21 advance-regression trajectory is arranged so that it is sandwiched between the front and back. According to such a waste incinerator, 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 or the incinerator collides with the pipe end of the hearth area air supply pipe 31. Combustion air can be evenly supplied to the first-stage combustion chamber 7 and the second-stage combustion chamber 8 to further promote the combustion of combustible waste and unburned waste during combustion.

It is a vertical sectional front view which omitted a part of the waste incinerator equipment which concerns on Example 1 of this invention. It is an overall plan view of a waste incinerator. It is a vertical sectional front view which shows the schematic structure of the waste incinerator. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is a longitudinal side view which shows the outline of the air supply device. It is a longitudinal front view which shows the air supply pipe in the first stage combustion chamber and the second stage combustion chamber. It is sectional drawing which shows the fumarole of the air supply pipe and the pipe holding structure. It is a vertical sectional front view which shows the structure of a waste input port. It is sectional drawing which shows the operation of a rotary drum and a flame-shielding damper. It is a vertical sectional front view which omitted a part of the waste incinerator equipment which concerns on Example 2 of this invention.

(Example 1) FIGS. 1 to 9 show Example 1 of the waste incinerator according to the present invention. The front / rear, left / right, and up / down in the present invention follow the notations of the crossing arrows shown in FIGS. 1 and 2 and the front / back / left / right / up / down in the vicinity of the crossing arrows. In FIG. 2, the waste incinerator is arranged between the first incinerator (incinerator) 1, the second incinerator (incinerator) 2, and both incinerators 1 and 2, and is arranged from each incinerator 1 and 2. It is provided with a dust collecting device 3 for removing soot and the like in the supplied combustion exhaust gas. In the waste incinerator according to this embodiment, each incinerator 1 and 2 are configured to be able to operate independently, and each incinerator 1 and 2 can independently incinerate. Further, in the waste incinerator according to the present embodiment, soot and dust contained in the combustion exhaust gas discharged from these incinerators 1 and 2 are 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 designated by the same reference numerals and the description thereof will be omitted. do.

The first incinerator 1 uses an incinerator case 11 formed in a horizontally long rectangular box shape as a base. More specifically, the first incinerator 1 includes an end block 4 at the left end, an end block 5 at the right end, and five intermediate blocks 6 arranged between the two blocks 4 and 5 as shown in FIG. It is connected to form a horizontally long rectangular box, and a front-stage combustion chamber 7 and a next-stage combustion chamber 8 continuous with the chamber 7 are provided inside the rectangular box. 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 in a step-down manner with respect to the former hearth 9. (See FIG. 1). In this embodiment, the first-stage combustion chamber 7 and the next-stage combustion chamber 8 may be simply collectively referred to as the combustion chamber 101, and the hearth 9 of the first-stage combustion chamber 7 and the hearth 10 of the next-stage combustion chamber 8 may be collectively referred to. May be simply collectively referred to as the hearth 102.

Inside the first-stage combustion chamber 7, a first pusher 13 is provided to send combustible waste burned in the hearth 9 toward the next-stage combustion chamber 8, and incinerator ash is discharged into the next-stage combustion chamber 8. A second pusher 14 for feeding toward the outlet 15 is provided. The ash discharge ports 15 are provided at three locations in front of and behind the end of the hearth 10 (see FIG. 4). Each of the pushers 13 and 14 is configured by using the hydraulic cylinders 16 and 17 as a drive source and fixing the transfer blades 20 and 21 to the tips of the piston rods 18 and 19. By intermittently reciprocating the transfer blades 20 and 21 with the hydraulic cylinders 16 and 17, combustible waste in the front combustion chamber 7 is sent to the next combustion chamber 8 along the hearth 9, or the next combustion chamber 8 is burned. The incineration ash in the chamber 8 can be sent to the ash discharge port 15 along the hearth 10.

At the end of the first incinerator 1 on the front-stage combustion chamber 7 side, a waste input port 24 for charging combustible waste into the front-stage combustion chamber 7 is provided, and the end wall 5a 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 combustion exhaust gas discharge port 25. The dust inlets 24 are provided at two locations in front of and behind the ceiling wall of the intermediate block 6 adjacent to the end block 4, and further, a combustion assist burner 26 is provided on the rear wall of the block 6. Combustion exhaust gas discharge ports 25 are formed at five locations in front of and behind the end wall 5a corresponding to the dust collector 49 described later (see FIG. 4).

An air supply device is provided in the first incinerator 1 in order to supply 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 (blower fan) 28 that is rotationally driven by a motor, a damper 29 that changes the destination of the combustion air pressurized and supplied by the blower 28, and each combustion chamber 7 for the combustion air. Two types of air supply pipes 30 and 31 to be supplied to 8 (combustion chamber 101), a pair of smoke exhaust nozzles 32 provided inside the chimney 57 described later, and an air supply passage 103 connecting these devices. I 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. It consists of an area air supply tube 31. The damper 29 supplies all of the combustion air pressurized by the blower 28 to the air supply pipes 30 and 31, and supplies most of the combustion air pressurized by the blower 28 to the pair of smoke exhaust nozzles 32. It is possible to switch to the state of

According to the above air supply device, the combustion air supplied from the blower 28 is supplied to the air supply pipes 30 and 31 or to the smoke exhaust nozzle 32 simply by switching the damper 29, respectively. 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 the air supply pipes 30 and 31, the internal pressure of each combustion chamber 7 and 8 is set to a pressure higher than the atmospheric pressure to burn combustible waste. Can be promoted. Further, in a state where 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 nozzles 32, and the combustion air to each of the air supply pipes 30 and 31. By reducing the amount of feed, it is possible to make the insides of the incinerators 1 and 2 negative pressure and eliminate the flame and the combustion gas from being blown out from the waste inlet 24. Further, since it is sufficient that each incinerator 1 and 2 is provided with one air supply device, it is not necessary to solve the complicated air supply structure for each incinerator 1 and 2, and the incinerators 1 and 2 have. The introduction cost can be reduced.

As shown in FIG. 6, the upper area air supply pipe 30 in the front combustion chamber 7 includes a pipe body 33 formed of a steel pipe or a cast pipe, and a flange 34 fixed to the upper end of the pipe body 33. A group of air jet 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 formed of a castable fireproof material. In this embodiment, as shown in FIG. 7, four fumaroles 35 are opened at equal intervals on the peripheral surface of the pipe body 33, and a set of four fumaroles 35 are provided in a multi-stage shape (6 stages). , The fumaroles 35 of each stage are adjacent to each other in a staggered pattern. Further, the upper and lower adjacent pitches P1 of the air jet holes 35 from the lower 1st to 3rd stages of the pipe body 33 are the upper and lower adjacent pitches of the air jet holes 35 from the lower 4th to 6th stages of the pipe body 33. By setting it smaller than P2, more combustion air is blown out from the lower end of the pipe body 33 so that the lower end portion of the pipe body 33 can be effectively cooled. By cooling the lower end portion of the pipe body 33 in this way, it is possible to prevent the lower end portion of the pipe body 33, which is easily exposed to high temperatures, from overheating and being worn at an early stage. The plug body 104 can be formed by arranging and fixing a thick metal plate material having excellent heat resistance at the lower end of the pipe body 33.

A total of six air supply pipes 30 and 31 are provided in the front stage combustion chamber 7, three of which are upper area air supply pipes 30 and penetrate through mounting holes provided in the ceiling wall of the front stage combustion chamber 7. It is inserted in the furnace. The remaining three are the hearth area air supply pipe 31, which is inserted from the upper opening of the refractory cylinder 36 projecting downward from the ceiling wall of the front combustion chamber 7, and the flange 34 is fixed by the bottom wall of the refractory cylinder 36. It is inserted into the furnace in a supported state (see FIG. 6). The refractory cylinder 36 is formed of a castable refractory material in a cylindrical shape, and its inner diameter is set to about three times the inner diameter of the pipe body 33. Specifically, when the inner diameter of the pipe body 33 and the air supply passage 103 is 73 mm, the inner diameter of the refractory cylinder 36 is 220 mm. In this way, when the air supply passage 103 and the hearth area air supply pipe 31 are connected via the in-cylinder space 109 of the refractory cylinder 36 having a larger cross-sectional area than these pipelines, the inside of the refractory cylinder 36 has a low temperature. Since it is filled with the combustion air of the above, it is possible to cool the upper part of the hearth area air supply pipe 31 and prevent the pipe 31 from becoming hot. Further, since the in-cylinder space 109 is large, the replacement work of the hearth area air supply pipe 31 can be performed smoothly and quickly.

The lower end of the upper area air supply pipe 30 attached to the ceiling wall of the front combustion chamber 7 is located at a height of about half of the vertical height of the front combustion chamber 7, and is mainly located in the upper half of the front combustion chamber 7. Combustion air is blown out. Further, the lower end of the hearth area air supply pipe 31 attached to the refractory cylinder 36 reaches the hearth 9 of the front combustion chamber 7, and mainly blows out combustion air to a portion near the hearth 9 of the front combustion chamber 7. .. The upper opening of the refractory cylinder 36 is exposed to the outside of the ceiling wall and is closed by a flange 105 provided in the air supply passage 103. The structure and vertical length of the pipe body 33 of the upper area air supply pipe 30 and the pipe body 33 of the hearth area air supply pipe 31 in the front combustion chamber 7 are the same. In this way, when each of the air supply pipes 30 and 31 is formed by the pipe body 33 having the same structure and vertical length, two types of air supply pipes, long and short, are prepared, and each air supply pipe is placed in the furnace from the ceiling wall of the front combustion chamber 7. Since it is sufficient to prepare one type of pipe main body 33 as compared with the case of projecting, 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 refractory cylinder 113 projecting downward from the ceiling wall of the combustion chamber 101, the low temperature combustion air supplied to the refractory cylinder 113 is used to feed the hearth area. 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 front combustion chamber 7 and the hearth area air supply pipe 31 attached to the refractory cylinder 36 are arranged in a staggered manner in the front-rear direction. Both air supply tubes 30 and 31 are arranged so as to sandwich the advance-retract trajectory of the transfer blade 20 (see FIG. 4). In this way, the upper area air supply pipes 30 are arranged in a staggered pattern with the advance-regression trajectory of the transfer blade 20 in between, and the lower end positions of the upper area air supply pipes 30 are made different so that the front combustion chamber The inside of the combustion chamber 7 can be evenly filled with combustion air to promote the combustion of combustible waste in the combustion chamber 7 and effectively incinerate the waste. The upper area air supply pipe 30 attached to the ceiling wall and the hearth area air supply pipe 31 attached to the refractory cylinder 36 are provided only in front of and behind the two intermediate blocks 6 facing the front 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 waste inlet 24 is formed.

In this embodiment, the front-rear pitch of the upper area air supply pipe 30 and the hearth area air supply pipe 31 is about twice the front-rear width of the transfer blade 20. In this way, if the front-rear pitch of both air supply tubes 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 transferred to the transfer blade 20. Even if it protrudes from the front and rear ends, it is possible to prevent the protruding combustible waste from hitting the lower end of the hearth area air supply pipe 31 reaching the hearth 9.

The hearth 9 of the front combustion chamber 7 is provided with a holder body 37 that covers the lower end of the hearth area air supply pipe 31. The holder body 37 is a refractory wall 106 formed of a ring-shaped refractory material (castable refractory material) formed by bulging on the hearth 9, and a holding hole 38 for receiving the lower end of the hearth area air supply pipe 31 is provided in the center thereof. It is formed. By covering the periphery of the lower end of the hearth area air supply pipe 31 with the refractory wall 106 around the holding hole 38 in this way, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperatures and melting. Therefore, the frequency of replacement of the air supply pipe 31 can be reduced, and the interval at which the operation of the waste incinerator is stopped can be prolonged due to the replacement of the hearth area air supply pipe 31, in other words, the waste incinerator. The operating time of the can be lengthened. Further, even if a part of the lower end of the hearth area air supply pipe 31 is melted, the plug body 104 supported by the hearth 9 does not fall off, so that the combustion air is continuously blown out from the air jet hole 35 and fed. As a result, waste incineration can be continued, and the frequency of replacement of the hearth area air supply pipe 31 can be further reduced. In addition, when a large amount of combustible waste is sent to 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 The floor area air supply pipe 31 can be prevented from tilting, and the hearth area air supply pipe 31 can be maintained in a vertical posture.

Similar to the previous combustion chamber 7, the next-stage combustion chamber 8 is provided with an upper area air supply pipe 30 and a hearth area air supply pipe 31. The upper area air supply pipe 30 of the next stage combustion chamber 8 is provided with a pipe body 40 and a flange 41 like the upper area air supply pipe 30 of the previous stage combustion chamber 7, and a group of air jet holes 42 are provided at the lower part of the pipe body 40. It is opened and the lower end of the tube body 40 is closed with a plug body 104. The arrangement pattern of the fumaroles 42 and the relationship between the upper and lower adjacent pitches P1 and P2 of the fumaroles 42 are the same as those of the fumaroles 35 of the upper area air supply pipe 30 of the front combustion chamber 7. Further, more combustion air is blown out from the lower end of the pipe body 40 to effectively cool the lower end portion of the pipe body 40, and the lower end portion of the pipe body 40 on the side closer to the hearth 9 is overheated and worn. It is the same in that it makes it possible to eliminate. The upper opening of the refractory cylinder 43 is exposed to the outside of the ceiling wall and is closed by a flange 105 provided in the air supply passage 103.

The structure and 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. When each of the air supply pipes 30 and 31 is formed of a pipe body 40 having the same structure and vertical length, two types of long and short 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 type of pipe main body 40 as compared with the case where the pipe main body 40 is projected into the furnace, the cost of each of the air supply pipes 30 and 31 can be reduced accordingly. However, since the vertical height of the next-stage combustion chamber 8 is larger than the vertical height of the previous-stage combustion chamber 7, the vertical lengths of the air supply pipes 30 and 31 of the next-stage combustion chamber 8 are the vertical lengths of the air supply pipes of the previous-stage combustion chamber 7. It is set larger than the vertical lengths of 30 and 31 (see FIG. 6).

A total of four air supply pipes 30 and 31 are provided in the next-stage combustion chamber 8, and two of them are inserted into the furnace through the mounting holes provided in the ceiling wall of the next-stage combustion chamber 8. The remaining two are inserted through the upper opening of the fireproof cylinder 43 protruding downward from the ceiling wall of the next-stage combustion chamber 8, and the furnace 41 is fixedly supported by the bottom wall of the fireproof cylinder 36. It is inserted inside (see FIG. 6). The refractory cylinder 43 is formed of a castable refractory material in a cylindrical shape, and its upper opening is exposed to the outside of 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 of about 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 refractory cylinder 43 reaches the hearth 10 of the next-stage combustion chamber 8.

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) formed by bulging on the hearth 10. By covering the periphery of the lower end of the hearth area air supply pipe 31 with the refractory wall 106 around the holding hole 45 in this way, it is possible to prevent the lower end of the hearth area air supply pipe 31 from being exposed to high temperatures and melting. Therefore, the frequency of replacement of the air supply pipe 31 can be reduced, and the operation time of the incinerator 1 is lengthened by prolonging the interval at which the operation of the incinerator 1 is stopped due to the replacement of the air supply pipe 31 in the hearth area. be able to. Further, even if a part of the lower end of the hearth area air supply pipe 31 is melted, the plug body 104 supported by the hearth 10 does not fall off, so that the combustion air is continuously blown out from the air jet hole 35 and fed. As a result, waste incineration can be continued, and the frequency of replacement of the hearth area air supply pipe 31 can be further reduced. Further, when a large amount of combustible waste or incineration ash was sent to the ash discharge port 15 by the transfer blade 21 of the second pusher 14, the combustible waste or incinerator ash protruding from the transfer blade 21 collided with the hearth area air supply pipe 31. Even so, the hearth area air supply pipe 31 is prevented from tilting and is maintained in a 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 refractory cylinder 43 are arranged in a staggered manner in the front-rear direction. , Both air supply tubes 30 and 31 are arranged so as to sandwich the advance-retract trajectory of the transfer blade 21 (see FIG. 4). In this way, the air supply tubes 30 and 31 are arranged in a staggered pattern with the advance-retraction trajectory of the transfer blade 21 in between, and the lower end positions of the air supply tubes 30 and 31 are made different so that the next stage combustion is performed. The inside of the chamber 8 can be evenly filled with combustion air to promote the combustion of combustible waste in the next-stage combustion chamber 8 and effectively incinerate the waste. The relationship between the front-rear pitch of the front-rear air supply tubes 30 and 31 and the front-rear width of the transfer blade 21 is the same as the relationship between the front-rear air supply tubes 30 and 31 in the front combustion chamber 7. In this 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 collectively referred to simply as the pipe main body 110, and the flanges 34 and 41 and the air jet hole. The 35.42, the refractory cylinder 36.43, the holder body 37/44, and the holding holes 38/45 may also be collectively referred to simply as the flange 111, the air jet hole 112, the refractory cylinder 113, the holder body 114, and the holding hole 115.

Below the ash discharge port 15, a heat-resistant conveyor (incineration ash transfer device) 46 for transferring the incinerated ash that has fallen 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 incinerator is lowered, receives the incinerator by the conveyor belt, transfers it to the front of the first incinerator 1, and puts it in a container (not shown).

In FIGS. 1 and 4, the dust collector 3 is composed of a square box-shaped dust collector case 48 having four side surfaces and a total of 10 dust collectors 49 housed in the dust collector case 48 in a multi-cyclone structure. Has been done. The first incinerator 1 and the second incinerator 2 are based on an incinerator case 11 formed in a rectangular box shape, and the end walls 5a thereof are connected in a state of being in contact with the left and right side surfaces of the dust collecting case 48. There is. 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. A smoke exhaust chamber 50 for collecting dust and smoke discharged from the dust collector 49 is provided above the dust collection case 48. The end walls 5a of each incinerator 1 and 2 are connected to the left and right opposite side surfaces of the dust collecting case 48, and the dust collectors 49 for the first incinerator 1 are arranged in a row along the left side surface, and the right side. Dust collectors 49 for the second incinerator 2 are arranged in a row along the surface. Each dust collector 49 includes an outer cylinder 52 provided with a downwardly squeezed dust exhaust port 51, and a smoke exhaust cylinder 53 that penetrates the upper wall of the outer cylinder 52 up and down and has an upper opening opened in the smoke exhaust chamber 50. The inlet cylinder 54 connected to the discharge port 25 is provided. The combustion exhaust gas introduced from the inlet cylinder 54 drops dust such as soot and dust in the combustion exhaust gas toward the dust discharge port 51 while swirling around the smoke exhaust cylinder 53, and only the smoke exhaust after dust removal is exhausted from the smoke exhaust cylinder 53. It is sent to the room 50. The lower part of the dust discharge port 51 faces the dust chamber 55 partitioned in the lower part of the dust collection case 48. Dust and the like accumulated in the soot chamber 55 can be taken out from a scraping port (not shown). As shown in FIG. 5, a flue 56 is led out to the rear part of the smoke exhaust chamber 50 and is connected to the chimney 57. Reference numeral 58 is an emergency exhaust stack branched into the flue 56.

As described above, according to the multi-cyclone structure dust collector 49, since it is not necessary to provide a movable part in the dust collector 49, the structure of the dust collector 49 can be simplified and the device can be configured at low cost. The overall cost of the waste incinerator can be reduced by that amount. Further, it is generated in the first-stage combustion chamber 7 and the next-stage combustion chamber 8 in which the exhaust ports 25 are formed at five locations on the end walls 5a of the incinerators 1 and 2 corresponding to the five dust collectors 49. The entire amount of the combustion exhaust gas produced can be reliably sent from each discharge port 25 to each corresponding dust collector 49 to properly remove dust. Further, since the discharge port 25 and the inlet cylinder 54 of the dust collector 49 can be communicated with each other simply by directly connecting the end wall 5a of each incinerator 1 and 2 to the dust collector 3, the incinerators 1 and 2 can be collected. There is also an advantage that time and effort can be saved when connecting to the dust device 3.

FIG. 8 shows the detailed structure of the waste inlet 24. The waste input port 24 includes a waste catching chute 61 fixed to the outer surface of the dust passing port 66 on the ceiling wall of the front combustion chamber 7, a rotary drum 62 arranged in the upper and lower parts of the dust receiving chute 61, and a rotary drum 62. It is composed of a dust receiving hopper 63 on the upper part of the above, a flame shield damper 65 that opens and closes the outlet 64 of the dust receiving chute 61, and the like. The rotary drum 62 is composed of a cylindrical drum having a dust receiving port 67 opened on the upper surface thereof, and its peripheral surface is rotatably supported by a pair of partially arcuate drum support walls 68 provided on the dust receiving chute 61. ing. The rotary drum 62 is reciprocally rotated by a drum drive structure 69 provided on the rear surface of the dust receiving chute 61, and has a dust receiving posture (state shown in FIG. 8) in which the dust receiving port 67 opens toward the dust receiving hopper 63. The dust receiving port 67 can be switched to the dust dropping posture (state shown in FIG. 9) in which the dust receiving port 67 opens toward the outlet 64. Further, the flame shield damper 65 is opened and closed by a damper drive structure (not shown) to communicate the outlet 64 and the dust passage 66 in an open posture (state shown in FIG. 9), and the outlet 64 and the dust passage 66. It is possible to switch to a blocking posture (state shown in FIG. 8) that cuts off the space.

A crane device 71 is arranged on the ceiling of the building in order to transfer combustible waste collected in a waste pit (not shown) to the waste inlets 24 of the first incinerator 1 and the second incinerator 2. The crane device 71 includes a pair of traveling rails 72 fixed to the beams of the building, a pair of saddles 73 that reciprocate left and right on the traveling rails 72, a girder 74 that is fixedly supported between the saddles 73, and a girder 74. It is composed of a traveling carriage 75 that moves back and forth on the top, a grab bucket 77 that is raised and lowered by a hoisting device 76 provided on the carriage 75, and the like. The traveling carriage 75 and the grab bucket 77 move between the garbage inlets 24 and 24 and the garbage pit, grab the combustible waste accumulated in the garbage pit with the grab bucket 77, and transport the combustible waste to the garbage inlets 24 and 24. And throw it in.

When the combustible waste grabbed by the grab bucket 77 is thrown into the waste inlet 24, the rotary drum 62 is placed in the waste receiving posture as shown in FIG. Drop it inside. Next, the flame-shielding damper 65, which has been in the shut-off posture, is raised to switch to the open posture, and in that state, the rotary drum 62 is rotated in the clockwise direction toward the dust-dropping posture. When the rotary drum 62 rotates from the dust receiving posture, the space between the lower ends of the pair of drum support walls 68 is blocked by the peripheral wall of the rotary drum 62. Further, when combustible waste is introduced, 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. Can be held in a negative pressure state. Therefore, the flame and the combustion gas in the front-stage combustion chamber 7 do not blow out from the waste inlet 24.

When the rotary drum 62 rotates a little more than 90 degrees from the garbage receiving posture, one end of the garbage receiving port 67 goes over the lower end of the drum support wall 68 and faces the outlet 64, and the combustible garbage in the rotary drum 62 becomes garbage. It gradually begins to fall from the socket 67. Then, when the rotary drum 62 rotates about 180 degrees from the waste receiving posture, the entire waste receiving port 67 opens toward the outlet 64, so that all the combustible waste in the rotary drum 62 is discharged to the outlet 64 and the waste outlet 66. It can be dropped into the pre-stage combustion chamber 7 via the above. After that, the flame-shielding damper 65 is tilted to return to the blocking posture, and the rotary drum 62 is returned to the dust receiving posture in a state where flames and combustion gas are prevented from flowing back into the dust receiving chute 61.

The waste incinerator configured as described above has a left-right length of 16 m from the end of the first incinerator 1 to the end of the second incinerator 2, and the front-rear length of each incinerator 1 and 2 is 2400 mm, up and down. 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 incinerator capacity of each incinerator 1 and 2 is 5 tons / Hr. Therefore, the incinerator capacity when the waste incinerator is operated continuously for 8 hours is (5 tons x 2 units x 8 hours = 80 tons). Converting this to the incineration capacity when the waste incinerator is fully operated for 24 hours continuously, it is 240 tons / day, which is comparable to that of a large waste incinerator. However, in many cases, the waste incinerator is operated for only 8 to 16 hours, so the waste incinerator according to this example is a relatively small municipality with a population of tens of thousands to hundreds of thousands. It can be a medium-sized waste incinerator suitable for use. By the way, while the introduction cost of a conventional large-scale incinerator is several billion yen or more, the total cost of introducing the waste incinerator described in this example is 300 to 400 million yen, which is 10 minutes. It can be said that it is a waste incinerator suitable for local governments with a relatively small population.

Next, the outline of the procedure for incinerating combustible waste with a waste incinerator will be described. When incinerating combustible waste, dry paper or corrugated cardboard with a low ignition temperature is put into the front combustion chamber 7 to ignite, and after waiting for the flame to spread, the blower 28 is started to activate each air supply tube 30/31. Blow out combustion air from. In this state, a predetermined amount of combustible waste is charged into the pre-stage combustion chamber 7 from the waste input port 24 of each incinerator 1 and 2 and incinerated. At this time, pressurized combustion air is blown out from the air supply pipes 30 and 31 toward the combustible waste inside each incinerator 1 and 2, and the ignited combustible waste is incinerated by the self-combustion action. Therefore, the operating cost can be significantly reduced as compared with the conventional incinerator that always operates the burner to incinerate the waste. Exceptionally, when flame-retardant combustible waste with a water content of 80% or more is continuously introduced throughout the day, the combustion assist burner 26 is operated to assist the combustion of combustible waste, but in many cases. Is introduced in a state where flame-retardant combustible waste and combustible waste with low water content are mixed, so it is not necessary to operate the combustion auxiliary burner 26, and the waste can be incinerated only by the self-combustion action of the combustible waste. .. Therefore, fuel consumption can be significantly reduced. Each combustible waste is additionally charged by 1.5 cubic meters at 15-minute intervals, and is dried and incinerated by the combustion heat of the previously charged combustible waste.

Since the combustible waste put into the first-stage combustion chamber 7 burns from its surface, the combustible waste on the side close to the hearth 9 receives the heat of combustion and dries to some extent, but does not burn. By intermittently sending the combustible waste in such a state toward the next-stage combustion chamber 8 by the transfer blade 20 of the first pusher 13, the combustible waste in the middle of combustion and the unburned waste near the hearth 9 are removed from the furnace. By dropping from the end of the floor 9 and stirring, the drying and burning of the unburned waste can be promoted, and the entire combustible waste 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. The inside of the next-stage combustion chamber 8 at the time of incinerating waste is exposed to a high temperature of about 850 ° C. by the radiant heat of the ceiling, the hearth 10, and the inner peripheral wall of the furnace. Therefore, it is possible to completely burn the unburned waste and prevent the generation of dioxins, and it is possible to surely prevent harmful substances from being discharged into the atmosphere.

The combustion ash deposited on the hearth 10 of the next-stage combustion chamber 8 is exposed to a high temperature of about 850 ° C. and completely burns to become charcoal gray or white powdery ash with low bulk. Therefore, the remaining amount of ash (heat reduction) with respect to the combustible waste put into the pre-stage combustion chamber 7 is only about 0.6%. Does not need to be ashed at the end of incineration. The ash removal work may be performed by operating the second pusher 14 and the heat-resistant conveyor 46 before the incinerator operation on the next day when the temperature inside the furnace drops sufficiently. Incidentally, since the remaining amount of ash in a conventional incinerator having the same amount of waste incinerated per day may reach about 15%, it is often necessary to carry out the ashing work continuously with the incinerator work.

In the waste incinerator according to the present embodiment, the dust collecting case 48 constituting the dust collecting device 3 is formed in a square box shape having four side surfaces, and the incinerators 1 and 2 are formed on the left and right side surfaces of the dust collecting case 48. Was connected. In addition, in the waste incinerator of this embodiment, each incinerator 1 and 2 are operated independently to incinerate the waste put into the waste input port 24 of each incinerator 1 and 2, and these incinerators are incinerated. The dust collector 3 can intensively remove soot and dust contained in the combustion exhaust gas discharged from 1 and 2. According to the waste incinerator according to the present embodiment having the above configuration, a plurality of incinerators 1 and 2 can be operated independently, so that a conventional incinerator equipped with only one incinerator or a conventional incinerator Compared with the conventional incinerator that operates two incinerators alternately, it is easy to double the amount of waste incinerator, and the incinerator capacity can be significantly improved. Further, since the combustion exhaust gas sent from the incinerators 1 and 2 can be collectively treated 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 and 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 collector case 48, and the discharge port 25 provided in the incinerator case 11 is the dust collector 49. Since the incinerators 1 and 2 and the dust collector 3 are installed separately because they communicate with the inlet cylinder 54, compared with the configuration in which the incinerators 1 and 2 are connected by a flue consisting of pipes such as pipes. , The length of the flue from incinerators 1 and 2 to the dust collector 49 can be shortened, and therefore a large attraction capacity for guiding the combustion exhaust gas from the incinerators 1 and 2 to the dust collector 49 becomes unnecessary, and the waste 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 step-down manner with respect to the hearth 9 of the previous-stage combustion chamber 7, and combustible waste is directed to the next-stage combustion chamber 8 along the hearth 9 in the front-stage combustion chamber 7. A first pusher 13 for intermittent feeding was provided. According to such an incinerator, combustible waste on the hearth 9 of the first-stage 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 to be combustible. Unburned waste in the waste can be agitated and exposed on the surface of the waste mass, and effectively dried and burned in the next-stage combustion chamber 8. Further, since the first pusher 13 and the second pusher 14 intermittently feed combustible waste and incineration ash, the delivery stroke of each pusher 13 and 14 should be about 2.5 m from the standby position at the maximum. The delivery operation of the pushers 13 and 14 can be performed in a stable state, and the delivery stroke of the pushers 13 and 14 is set to be the same as the left and right length of the hearth 9, as compared with the case where the pushers 13 and 14 are delivered. There is also the advantage that the overall cost of 14 can be reduced.

In the first incinerator 1 and the second incinerator 2, each of the end walls 5a of the next-stage combustion chamber 8 provided with the discharge port 25 is connected to the case walls facing the left and right sides 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 overall structure of the waste incinerator can be simplified and the space required for its installation can be reduced. Therefore, when introducing a waste incinerator, it is not necessary to secure a vast site, and it is possible to easily construct a waste incinerator even in an open area in a mountainous area, for example.

A crane device 71 for transporting combustible waste is arranged above each incinerator 1 and 2, and incinerator ash that has fallen from the ash discharge port 15 is transferred to the front of each incinerator 1 and 2 below the ash discharge port 15. Since the heat-resistant conveyor 46 is provided, it is possible to put combustible waste into each incinerator 1 and 2 and to automate the removal of incinerated ash that has fallen from the ash discharge port 15, which puts a burden on workers involved in incinerator. It can be reduced and safety can be improved.

Each incinerator 1 and 2 is configured as a sectional structure furnace with an end block 4, an end block 5, and five intermediate blocks 6 arranged between both blocks 4 and 5, so that the incinerators 1 and 2 are constructed at the factory. A waste incinerator can be constructed in a short period of time simply by transporting each of the manufactured blocks 4, 5 and 6 to the construction site and assembling them. Further, even in the existing incinerator, the incinerator capacity of the incinerator can be increased by adding the intermediate block 6. Furthermore, there is an advantage that the damaged incinerator can be restored in a short time without having 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 block of the damaged part. Even if it is necessary to stop the operation of one of the incinerators 1 and 2 due to 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-mentioned waste incinerator, a total of 10 air supply pipes 30 and 31 for supplying combustion air to the combustion chamber 101 are alternately arranged before and after the ceiling walls of the end block 4 and the intermediate block 6. Therefore, the combustion air can be evenly supplied to every corner of the inside of the combustion chamber 101, and the combustible waste can be effectively incinerated. Further, since the end of each of the air supply pipes 30 and 31 faces the outside of the delivery locus of the first pusher 13 and the second pusher 14, combustible waste is moved by the first pusher 13, or the incinerator ash is transferred to the first pusher 13. 2 When moving with the pusher 14, the combustion air is evenly sent to the first stage combustion chamber 7 and the next stage combustion chamber 8 while surely preventing combustible waste and incinerator ash from colliding with the pipe end of the hearth area air supply pipe 31. It can be supplied to promote the burning of combustible waste and unburned waste during combustion.

Further, since the waste input port 24 is formed in front of and behind the ceiling wall of the intermediate block 6 adjacent to the end block 4, the waste mass shape of the combustible waste input from the waste input port 24 into the front combustion chamber 7 is input. The surface area can be increased by arranging it in a chevron shape just below the mouth 24. Therefore, as the surface area of the waste mass is large, the drying and combustion of combustible waste can be promoted and the time required for incineration can be reduced. Incidentally, when combustible waste is thrown into the inner surface of the end block 4 and the corner of the hearth 9, the waste mass accumulates so as to fill the previous corner, so that the surface area of the waste mass becomes smaller.

Since the dust inlet 24 is configured by the dust receiving chute 61, the rotary drum 62, the flame-shielding damper 65 that opens and closes the outlet 64 of the dust receiving chute 61, and the like, the posture of the rotary drum 62 and the flame-shielding damper 65 can be changed. When combustible waste is dropped into the front-stage combustion chamber 7 by alternately switching, the rotary drum 62 or the flame-shielding damper 65 ensures that the flame and combustion gas in the front-stage combustion chamber 7 try to be ejected from the waste input port 24. Can be prevented. Therefore, the combustible waste can be put into the front-stage combustion chamber 7 in a safe state, and the high-temperature combustion gas can be surely prevented from being discharged to the outside of the furnace to lower the temperature inside the furnace.

The air supply device is a blower 28, a plurality of upper area air supply pipes 30 that mainly supply combustion air to the upper half of the combustion chamber 101, and combustion air is mainly supplied to the vicinity of the hearth 102 of the combustion chamber 101. It is assumed that a plurality of hearth area air supply pipes 31 are provided. 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 reaches the hearth 102 of the combustion chamber 101. The periphery was covered with a holder body 114 made of a fireproof material provided on the hearth 102. According to such a waste incinerator, 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 reaches the hearth 102, the combustion air discharged from the lower part of the hearth area air supply pipe 31 is surely made into combustible waste burning in the vicinity of the hearth 102. The combustible waste can be incinerated in a shorter time by effectively incinerating the combustible waste in the combustion chamber 101. Further, 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 a high temperature and being melted. Therefore, the frequency of replacement of the air supply pipe 31 can be reduced, and the operating cost of the waste incinerator can be reduced accordingly.

(Example 2)
FIG. 10 shows a waste incinerator according to the second embodiment. There, the incinerator 1 and the dust collector 3 constitute a waste incineration facility, and a total of 10 air supply pipes 30 and 31 are provided in the combustion chambers 7 and 8 of the front stage and the rear stage. Since the structures of the incinerator 1 and the dust collector 3 are the same as the structures of the incinerator 1 and the dust collector 3 described in the first embodiment, the same members are designated by the same reference numerals and the description thereof will be omitted. As can be seen from this embodiment, the waste incinerator does not need to be equipped with multiple incinerators. Further, the combustion chamber 101 does not need to be composed of the first stage combustion chamber 7 and the next stage combustion chamber 8, and a single combustion chamber may be provided inside the incinerator 1.

In the above embodiment, a total of 10 dust collectors 49 are provided inside the dust collecting case 48, but for example, only 5 dust collectors 49 are provided on the peripheral surface thereof for the first incinerator 1. An inlet cylinder 54 and an inlet cylinder 54 for the second incinerator 2 may be provided.

1 1st incinerator (incinerator)
2 Second incinerator (incinerator)
3 Dust collector 4 End block 5 End block 6 Intermediate block 7 Pre-stage combustion chamber 8 Next-stage combustion chamber 9 Pre-stage combustion chamber hearth 10 Next-stage combustion chamber hearth 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 front combustion chamber 7 and next combustion chamber 8)
102 Hearth (general term for hearth 9 in the first-stage combustion chamber and hearth 10 in the second-stage combustion chamber)
103 Air supply passage 106 Fireproof wall 109 In-cylinder space 110 Pipe body (collective term for pipe body 33 and pipe body 40)
112 Fumaroles (general term for fumaroles 35 and 42)
113 Refractory cylinder (general term for refractory cylinder 36 and refractory cylinder 43)
114 Holder body (collective term for holder body 37 and holder body 44)
115 Holding hole (collective term for holding hole 38 and holding hole 45)
P1 Adjacent pitch of fumaroles P2 Adjacent pitch of fumaroles

Claims (7)

An incinerator (1) provided with a waste inlet (24), a dust collector (3) connected to the incinerator (1) to remove soot and dust in the 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) that pressurizes and feeds the combustion air, and a plurality of upper area air supply pipes that feed 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 supplying the combustion air supplied 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 of a steel pipe body (110) whose lower end is closed and a group of fumaroles (112) are opened on the lower peripheral surface. Has been
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 waste incinerator characterized in that the circumference 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 pipe body (110) made of steel pipe 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 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 the refractory cylinder (113) projecting downward from the ceiling wall of the combustion chamber (101), and the lower end of the pipe body (110) is the hearth (102). ), The waste incinerator according to claim 1. A holding hole (115) in which the holder body (114) is formed of a ring-shaped refractory material bulging on the hearth (102) and holds the lower end of the hearth area air supply pipe (31) in the center thereof. Is formed,
The waste incinerator according to claim 1 or 2, wherein the lower end of the hearth area air supply pipe (31) is covered with a refractory wall (106) around the holding hole (115). The upper opening of the refractory cylinder (113) is exposed to the outside of the ceiling wall of the combustion chamber (101) and is connected to an air supply passage (103) for supplying combustion air.
The waste 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 cylinder (113) having a larger cross-sectional area than these passages. Incinerator. Fumaroles (112) are formed at a plurality of locations in the circumferential direction of the lower part of the pipe body (110) at equal intervals and in multiple stages in the vertical direction, and the fumaroles (112) in each stage are adjacent to each other in a staggered manner. And
Of the fumarole (112) forming regions, the upper and lower adjacent pitches (P1) of the fumaroles (112) formed on the lower half side are the upper and lower adjacent pitches of the fumaroles (112) formed on the upper half side. The waste incinerator according to any one of claims 2 to 4, which is set smaller than (P2). A plurality of intermediate blocks (4, 5) in which the incinerator (1) is arranged between the end block (4), the end block (5) connected to the dust collector (3), and both blocks (4.5). It is configured by connecting to 6).
When the length direction of the incinerator (1), which is the connecting 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) is referred to. The waste incinerator according to any one of claims 2 to 5, wherein the upper area air supply pipe (30) and the hearth area air supply pipe (31) are alternately arranged before and after the intermediate block (6). The combustion chamber (101) includes a front-stage combustion chamber (7) facing the waste inlet (24) and a next-stage combustion chamber (8) continuous with the combustion chamber (7), and the next-stage combustion chamber (8). ) Is provided in a stepped-down manner with respect to the hearth (9) of the front 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 incinerator ash to the outside of the combustion chamber (101).
A first pusher (13) that intermittently sends combustible waste burning in the first-stage combustion chamber (7) toward the next-stage combustion chamber (8) is provided inside the front-stage combustion chamber (7).
A second pusher (14) that intermittently sends incineration ash in the next-stage combustion chamber (8) toward the ash discharge port (15) is provided inside the next-stage 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 next stage combustion chamber (8).
A plurality of upper area air supply pipes (30) and a plurality of hearth area air supply pipes (31) advance the transfer blade (20) of the first pusher (13) and the transfer blade (21) of the second pusher (14). -The waste incinerator according to claim 6, which is arranged so as to sandwich the retreat locus in the front and back.

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