JP7272630B2 - Ash removal method and ash removal system for dry distillation gasification incineration treatment equipment - Google Patents

Description

The present invention relates to an ash removal method and an ash removal system for a dry distillation gasification incineration treatment apparatus.

Conventionally, there has been known a dry distillation gasification and incineration apparatus that includes a dry distillation furnace and a combustion furnace, and guides combustible gas generated in the dry distillation furnace to the combustion furnace for complete combustion (see, for example, Patent Document 1). .

In the dry distillation gasification and incineration equipment, part of the waste such as waste tires stored in the dry distillation furnace is burned, and the remaining waste is dry distilled (thermally decomposed) by the combustion heat to produce a combustible gas. and the combustible gas produced by the dry distillation gasification is introduced from the dry distillation furnace into the combustion furnace and burned. The waste stored in the dry distillation furnace is incinerated into ash in the dry distillation furnace when there is no part of the waste that can generate combustible gas by dry distillation.

By the way, since the dry distillation gasification and incineration treatment equipment is of a batch type (batch type), if the waste contained in the dry distillation furnace is incinerated into ash, the ash is transferred to the dry distillation furnace. You need to take it outside and prepare it for the next waste disposal. In the present application, the operation of removing the ash from the dry distillation furnace is referred to as "ash removal".

The dry distillation furnace is provided with a pair of bottom doors which are vertically swingable with both sides of the bottom as fulcrums and open and close the bottom by swinging, for the removal of the ash. is opened vertically like a double door so that the ash is dropped onto a receiving carriage or the like below the bottom (see, for example, Patent Document 2).

When the pair of swingable bottom doors are opened vertically like double doors, the waste can be dropped without remaining on the bottom doors, and the ash can be removed in a short time.

JP 2015-143615 A JP-A-8-166114

However, when the pair of swingable bottom doors are opened vertically like double doors to drop the ash, the fine ash is scattered around and the surrounding environment deteriorates. When the bottom doors of the furnace are respectively swung by cylinders, the waste and ash materials increase as the dry distillation furnace becomes larger. Since the load of the waste is applied to the portions where the doors are joined together in the closed position, the bottom door tends to open, which causes a problem that the airtightness in the dry distillation furnace is deteriorated.

Moreover, as the size of the dry distillation furnace increases, the amount of the ash increases, which makes it difficult to dispose of the ash removed from the dry distillation furnace.

The present invention eliminates such inconveniences and allows the pair of bottom doors to swing freely without damaging the equipment even in a large-sized dry distillation furnace, while maintaining the airtightness inside the dry distillation furnace. A dry distillation gasification that can easily and efficiently treat the ash removed from the dry distillation furnace without deteriorating the surrounding environment due to the scattering of fine ash when the ash is dropped. An object of the present invention is to provide an ash removal method and an ash removal system for an incinerator.

In order to achieve such an object, the method for removing ash from a dry distillation gasification and incineration treatment apparatus of the present invention burns a part of the stored waste and dry distills the rest of the waste by means of the combustion heat to sequentially make it combustible. A method for removing ash from a dry distillation gasification incineration apparatus comprising a plurality of dry distillation furnaces for generating flammable gases and a combustion furnace for burning the combustible gas introduced from the dry distillation furnaces, wherein the waste in the dry distillation furnaces A step of spraying an aqueous solution of a surfactant to the ash deposited on the bottom of the dry distillation furnace when all the substances are incinerated to become an ash, and a pair of bottom doors are suspended to open vertically. a floor which is located on a line connecting the bottoms of a plurality of dry distillation furnaces and has an inclination that gradually descends from the upstream side to the downstream side; a step of dropping the ash onto the ash conveying path having side walls standing on both sides of the surface; closing the bottom; discharging the ash that has fallen onto the ash conveying path to first ash containing means provided below the downstream end of the ash conveying path; and a step of transferring the ash stored in the second ash storage means to the second ash storage means.

The ash removing method of the present invention comprises a plurality of dry distillation furnaces for burning a part of the stored waste while dry distilling the rest of the waste with the combustion heat to generate a combustible gas, and introducing from the dry distillation furnace It is suitably used for removing ash from a dry distillation gasification incineration treatment apparatus equipped with a combustion furnace for burning combustible gas.

In the dry distillation gasification and incineration equipment, part of the waste stored in the dry distillation furnace is burned, and the remaining waste is dry distilled (pyrolyzed) by the combustion heat to generate combustible gas. A combustible gas is introduced into the combustion furnace for complete combustion. The waste stored in the dry distillation furnace is incinerated into ash in the dry distillation furnace when there is no part of the waste that can generate combustible gas by dry distillation.

Therefore, in the ash removal method of the present invention, when all the waste in the dry distillation furnace is incinerated into ash, first, a surfactant is added to the ash deposited at the bottom of the dry distillation furnace. Spray aqueous solution. Next, a pair of bottom doors are hung and opened like double doors to open the bottom, and the ash is dropped onto the ash transport path located below the dry distillation furnace.

At this time, since the waste is wetted with the aqueous solution of the surfactant, even if the waste is dropped from the dry distillation furnace onto the ash transport path, the fine ash will not scatter and the surrounding environment will not be affected. aggravation can be prevented. In addition, since the pair of bottom doors are hung and opened vertically like double doors, even when the dry distillation furnace is enlarged and the amount of the ash is increased, the load of the ash is resisted. The bottom door can be supported by suspension and can be made swingable without damaging the device.

In the ash removing method of the present invention, next, after the ash is dropped onto the ash transport path, a pair of bottom doors opened like double doors are lifted to close the bottom of the dry distillation furnace. In the dry distillation gasification incineration apparatus, when the bottom of the dry distillation furnace is closed, new waste is supplied to the dry distillation furnace to prepare for dry distillation gasification of the waste. At this time, if the dry distillation furnace is enlarged, the amount of waste to be accommodated also increases, and the weight of the waste is applied to the joints of the bottom doors in the closed position, and the bottom doors may open freely. Concerned.

However, in the ash removal method of the present invention, the bottom of the dry distillation furnace is closed by lifting the pair of bottom doors. In the closed position, the bottom door can be lifted and supported against the load of the waste ash material applied to the joints, thereby maintaining the airtightness of the dry distillation furnace.

In the ash removing method of the present invention, next, the ash that has fallen onto the ash conveying path is moved along the ash conveying path, and the first ash that is provided below the downstream end is moved along the ash conveying path. Then, the ash stored in the first ash storage means is transferred to the second ash storage means.

In the ash removal method of the present invention, the ash that has fallen onto the ash transport path can be easily disposed of by discharging it into the first ash storage means, and the ash can be stored in the first ash storage means. In addition, the ash is transferred to the second ash storage means, and the ash after a plurality of times of ash removal is collected in the second ash storage means, so that the ash can be efficiently treated. .

In the ash removing method of the present invention, when the ash is dropped onto the ash conveying path, it is preferable to open the bottom of the dry distillation furnace in a plurality of steps while adjusting the degree of opening. By doing so, it is possible to reliably prevent the waste accumulated on the bottom door from remaining on the bottom door by dropping the waste onto the ash transport path. can.

In addition, since the ash removal method of the present invention can easily and efficiently treat the ash taken out from the dry distillation furnace, the dry distillation gasification and incineration equipment can be used in a plurality of dry distillation furnaces that sequentially generate combustible gas. can be used when providing

The ash removal method of the present invention includes, for example, a plurality of dry distillation furnaces for burning part of the stored waste and dry distilling the rest of the waste with the heat of combustion to sequentially generate combustible gas; An ash removal system for a dry distillation gasification and incineration treatment apparatus comprising a combustion furnace for burning combustible gas introduced from the furnace, the bottom being provided at the bottom of the dry distillation furnace and being opened and closed like a double door by swinging the bottom up and down. a pair of bottom doors, a means for lifting or suspending the pair of bottom doors to make them swingable, and the ash of the wastes provided in the dry distillation furnace and deposited on the bottom doors. a surfactant aqueous solution spraying means for spraying an aqueous solution of a surfactant to the surface of the dry distillation furnace; a floor surface located on a line connecting the bottoms of the plurality of dry distillation furnaces and having a slope that gradually descends from the upstream side to the downstream side; an ash-conveying passage having side walls standing on both sides of a floor surface; and a transfer means for transferring the ash stored in the first ash storage means to the second ash storage means. It can be carried out by the ash removal system of the equipment.

The ash removal system of the present invention includes a plurality of dry distillation furnaces that sequentially generate combustible gas, so that while the waste is dry distilled in the first dry distillation furnace to generate combustible gas, the second In the dry distillation furnace, after the completion of the generation of the combustible gas, the waste is incinerated and the ash is removed. Each can perform a different action, such as preparing a dry pile of things . The ash conveying path is preferably positioned on a line connecting the bottoms of the plurality of dry distillation furnaces, and the ash taken out from the plurality of dry distillation furnaces is treated by the single ash conveying path. It can be carried out.

Further, the ash transport path includes a floor having a slope that gradually descends from the upstream side to the downstream side, and side walls that stand up on both sides of the floor. By providing the above-described configuration, the ash transport path can easily move the ash that has fallen onto the floor along the slope of the floor from upstream to downstream. In addition, since the ash transport path has side walls that stand up on both sides of the floor, when the ash is moved along the slope of the floor, the waste is transported from both sides of the floor. It is possible to prevent the ash from falling out of the conveying path.

Moreover, in the ash removal system of the present invention, it is preferable that the discharge means includes a frame that is movable back and forth along the ash conveying path, and a removal plate attached to the frame. According to the discharging means, the waste is moved forward along the ash conveying path by the frame, and the waste is pushed by the unloading plate to push the waste away from the slope of the floor of the ash conveying path. can be easily moved from upstream to downstream along the

Also, in the ash removal system of the present invention, the transfer means includes a straight portion that stands obliquely at a predetermined angle with respect to the vertical direction, and a curved portion that curves downward in the direction of inclination at the upper end of the straight portion. It is preferable to provide a pair of rail members and moving means for moving the first ash containing means along the rail members.

According to the transfer means, the first ash containing means containing the ash is moved by the moving means along the linear portion of the rail member to the upper end of the linear portion. Then, at the upper end of the straight portion, the first ash containing means is moved along the curved portion to be inverted. As a result, the ash stored in the first ash storage means can be easily transferred from the first ash storage means to the second ash storage means.

1 is a system configuration diagram showing the configuration of a dry distillation gasification incineration apparatus used in the present invention; FIG. A is a side view of the dry distillation furnace shown in FIG. 1, and B is a bottom view of the dry distillation furnace shown in FIG. A is a plan view of the dispensing means shown in FIG. 1, B is a front view of the dispensing means shown in FIG. 1, and C is a side view of the dispensing means shown in FIG. FIG. 2 is a side view of the transfer means shown in FIG. 1;

Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

The dry distillation-gasification incineration apparatus ash removing method of the present embodiment can be applied to the dry distillation-gasification incineration apparatus 1 shown in FIG.

The dry distillation gasification and incineration treatment apparatus 1 contains three dry distillation furnaces 2a, 2b, and 2c for storing waste A such as waste tires, and performing dry distillation gasification and incineration. and a combustion furnace 4 connected via passages 3a, 3b, 3c.

On the upper surface of the dry distillation furnaces 2a, 2b and 2c, inlets 6a, 6b and 6c having openable and closable inlet doors 5a, 5b and 5c are formed. It can be thrown into the furnaces 2a, 2b and 2c. The interiors of the dry distillation furnaces 2a, 2b, 2c are substantially isolated from the exterior when the input doors 5a, 5b, 5c are closed. The dry distillation furnaces 2a, 2b, and 2c are provided with a weighing device (not shown) for weighing a predetermined amount of waste A and throwing it into the dry distillation furnaces 2a, 2b, and 2c through inlets 6a, 6b, and 6c. may

A water jacket (not shown) isolated from the inside of the dry distillation furnaces 2a, 2b and 2c is formed as a cooling structure around the outer periphery of the dry distillation furnaces 2a, 2b and 2c. The water jacket is supplied with water by a water supply device (not shown) so that the amount of water inside is maintained at a predetermined level.

Bottom doors 7a, 7b, and 7c are provided in the lower portions of the dry distillation furnaces 2a, 2b, and 2c. It is designed to be physically cut off from the outside. Empty chambers 8a, 8b, 8c isolated from the interiors of the dry distillation furnaces 2a, 2b, 2c are formed below the bottom doors 7a, 7b, 7c. It communicates with the inside of the dry distillation furnaces 2a, 2b, 2c through a plurality of air supply nozzles 9a, 9b, 9c provided in 7b, 7c.

Dry distillation oxygen supply paths 11a, 11b, and 11c branching off from an oxygen supply path 10 are connected to the empty chambers 8a, 8b, and 8c, respectively. It is connected to the. Control valves 13a, 13b and 13c are provided in the dry distillation oxygen supply paths 11a, 11b and 11c, respectively, and the opening degrees of the control valves 13a, 13b and 13c are controlled by valve drivers 14a, 14b and 14c. ing. In this case, the valve drivers 14a, 14b and 14c are controlled by a control device 15 which is composed of an electronic circuit including a CPU.

Ignition devices 16a, 16b, and 16c for igniting the waste A contained in the dry distillation furnaces 2a, 2b, and 2c are attached to the lower portions of the dry distillation furnaces 2a, 2b, and 2c, respectively. The ignition devices 16a, 16b, 16c are composed of ignition burners, etc., and burn fuel supplied through fuel supply paths 18a, 18b, 18c from fuel supply devices 17a, 17b, 17c in which fuel such as light oil is stored. A combustion flame is supplied to the waste A by causing the

Further, the dry distillation furnaces 2a, 2b and 2c further have surfactant aqueous solution spraying means for spraying an aqueous solution of a surfactant on the incinerated matter deposited on the bottom doors 7a, 7b and 7c after the waste A is completely incinerated. (not shown).

The combustion furnace 4 includes a burner unit 19 for mixing combustible gas generated by dry distillation of the waste A and oxygen (air) necessary for complete combustion of the combustible gas, and a combustion unit for burning the combustible gas mixed with oxygen (air). The combustion section 20 communicates with the downstream side of the burner section 19 . A gas passage 3 is connected to the upstream side of the burner portion 19, and the combustible gas generated by the dry distillation of the waste A in the dry distillation furnaces 2a, 2b, and 2c is supplied to the gas passage 3 on the upstream side of the gas passage 3. The gas passages 3a, 3b and 3c to guide are connected through dampers 21a, 21b and 21c , respectively, so that the combustible gas is introduced into the burner section 19 through the gas passage 3. As shown in FIG.

A space (not shown) isolated from the inside is formed in the outer peripheral portion of the burner portion 19 , and the space is formed by a plurality of nozzle holes (not shown) drilled in the inner peripheral portion of the burner portion 19 . ) to the inside of the burner section 19 . A combustion oxygen supply passage 22 branching from the oxygen supply passage 10 is connected to the empty chamber. The combustion oxygen supply passage 22 is arranged so as to pass through the combustion section 20 on the way, and oxygen (air) preheated in the combustion section 20 is supplied to the empty chamber.

A control valve 23 is provided in the combustion oxygen supply passage 22 , and the opening degree of the control valve 23 is controlled by a valve driver 24 . In this case the valve driver 24 is controlled by the control device 15 .

A combustion device 25 is attached to the upstream side of the burner section 19 . The combustion device 25 is composed of an ignition burner or the like, and heats the combustion furnace 4 by burning fuel supplied through a fuel supply passage 27 from a fuel supply device 26 in which fuel such as light oil is stored. The combustion device 25 is also used when igniting the combustible gas introduced into the burner section 19 .

A hot water boiler 28 that is heated by combustion exhaust gas burned in the combustion furnace 4 is attached to the downstream side of the combustion section 20 . The hot water boiler 28 heats water supplied by a water supply device (not shown) using combustion heat of the waste A, and the hot water thus generated can be used for air conditioning or the like.

A duct 29a for discharging combustion exhaust cooled by the hot water boiler 28 is provided on the outlet side of the hot water boiler 28, and the duct 29a is connected to the upper end of an air-cooled heat exchanger 31 via an on-off valve 30. ing. The air-cooled heat exchanger 31 is circulated with air supplied from a not-shown compulsory fan or the like, and exchanges heat with the combustion exhaust introduced from the duct 29a to cool the combustion exhaust. The combustion exhaust cooled by the air-cooled heat exchanger 31 is taken out through a duct 29b connected to the lower portion of the air-cooled heat exchanger 31 via an on-off valve 32. As shown in FIG.

On the other hand, a duct 29c branches from the duct 29a on the upstream side of the on-off valve 30, and the duct 29c is connected to the upper end of the quenching tower 34 via the on-off valve 33. The quenching tower 34 is provided with a sprayer 35 for cooling the combustion exhaust gas introduced from the duct 29c by sprinkling water, and the sprayer 35 is connected to a water supply device (not shown) for supplying cooling water and an air compressor.

The combustion exhaust cooled in the quenching tower 34 is taken out through a duct 29d connected to the lower part of the quenching tower 34 through an on-off valve 36. The duct 29d joins the duct 29b on the downstream side of the on-off valves 32,36.

The duct 29b is connected to one end of the bag filter 37, and the combustion exhaust introduced from the duct 29b into the bag filter 37 is mixed with slaked lime and activated carbon supplied from the chemical silo 38, and desulfurization and deodorization are performed. will be

The bag filter 37 includes a filter portion and a recovery portion for recovering ash or the like separated from the combustion exhaust by the filter portion, and an air compressor (not shown) for cleaning the filter portion is connected to the filter portion. there is A duct 29 e is connected to the other end of the bag filter 37 , and the duct 29 e is connected to a chimney 40 via an induction fan 39 that induces combustion exhaust in the combustion furnace 4 .

A duct 29f is provided downstream of the combustion furnace 4 to discharge combustion exhaust when the hot water boiler 28 is not used. Furthermore, in the dry distillation gasification incineration treatment apparatus 1 of the present embodiment, a temperature sensor (not shown) for detecting the temperature inside the combustion furnace 4 is provided at a position facing the downstream side of the burner section 19 . A detection signal from the temperature sensor is input to the control device 15 .

The dry distillation gasification and incineration treatment apparatus 1 further includes a slope 42 as an ash transport path on a line connecting the bottoms of the dry distillation furnaces 2a, 2b, and 2c, and the slope 42 gradually descends from the upstream side to the downstream side. It has a floor surface 43 with a slope and side walls 44 standing on both sides of the floor surface 43 . Here, the dry distillation furnaces 2a, 2b, and 2c are linearly arranged in the order of the dry distillation furnace 2a, the dry distillation furnace 2b, and the dry distillation furnace 2c along the length direction of the slope 42 from the downstream side.

On the floor surface 43 of the slope 42, an earth removing device 45 is provided as a discharge means for moving the ash deposited on the floor surface 43 along the floor surface 43 so as to move back and forth. A first bucket 46a as first ash storage means is arranged below the downstream end of the slope 42, and a second bucket 46b is arranged below the upstream end of the slope 42. are placed.

Each of the first bucket 46a and the second bucket 46b is a rectangular parallelepiped having a pair of side surfaces 461 and 462 parallel to the slope 42 and extending in the width direction of the slope 42 in plan view. The long side of the shape has a length that accommodates the length of the slope 42 in the width direction.

A container 47 as a second ash storage means is movably arranged on the side of the first bucket 46a. A lift 48 is provided as transfer means for transferring the ash stored in the container 46 a to the container 47 .

Next, referring to FIG. 2, the construction of the dry distillation furnaces 2a, 2b and 2c will be described. The dry distillation furnaces 2a, 2b, and 2c all have the same configuration, and the configuration will be described below taking the dry distillation furnace 2a as an example.

As shown in FIG. 2B, the dry distillation furnace 2a has a pair of bottom plate members 202a and 202b as a bottom door 7a for closing the circular bottom portion 201. The bottom plate members 202a and 202b extend the bottom portion 201 along its diameter. It has a semi-circular shape that divides into two.

Further, as shown in FIG. 2A, the bottom surfaces of the bottom plate members 202a and 202b are supported by arm members 203a and 203b. , and supported by support members 204a and 204b provided at the bottom of the dry distillation furnace 2a. The arm members 203a and 203b are provided with support posts 205a and 205b erected on the diametrical ends of the semicircular bottom plate members 202a and 202b. 206b. The bottom plate members 202a and 202b are joined together at their diametrical ends to form a joint 207 in the closed position.

On the other hand, in the dry distillation furnace 2a, bottom plate members 202a and 202b as the bottom door 7a are lifted or suspended from the side walls at both ends in the length direction of the joint portion 207, and each pair serves as a lifting means for swinging. Motor blocks 209a and 209b are provided, and the motor blocks 209a and 209b are arranged so as to sandwich the joint portion 207 therebetween. The motor blocks 209a and 209b are chain blocks that drive chains by motors. Next, the configuration of the motor block 209a will be described as an example.

The motor block 209a includes a motor block body 210a containing a plurality of gears (not shown) and a motor for rotating the gears, an upper hook 211a directly connected to the motor block body 210a, and a chain 212a attached to the motor block body 210a. It is provided with a lower hook 213a connected via. The upper hook 211a is engaged with an engaging member 214a provided on the side wall of the dry distillation furnace 2a, and the lower hook 213a is engaged with an engaging member 206a provided on the post 205a of the arm member 203a supporting the bottom plate member 202a. ing.

The chain 212a is wound around a plurality of gears built into the motor block body 210a, and is extended or retracted from the motor block body 210a by rotating the gears by the motor. As a result, when the chain 212a is let out from the motor block body 210a, the bottom plate member 202a is suspended by the chain 212a and swings downward, and when the chain 212a is drawn into the motor block body 210a, the bottom plate member 202a is lifted by the chain 212a and swings upward. , and cooperates with a bottom plate member 202b that operates similarly to open and close the bottom portion 201 of the dry distillation furnace 2a.

Next, referring to FIG. 3, the configuration of the earth removing device 45 will be described.

The earth unloading device 45 includes a frame 451 having a length that traverses the slope 42 in the width direction, a main earth unloading plate 452 attached to the front of the frame 451 , and a secondary unloading plate 452 attached to the back of the frame 451 . It has a soil plate 453 and a motor 454 arranged between the main soil removal plate 452 and the sub soil removal plate 453 .

As shown in FIG. 3A , the main earth removing plate 452 has a “<” shape in plan view, and both side surfaces of the main earth removing plate 452 protrude slightly forward with respect to the central portion of the slope 42 . Further, as shown in FIG. 3C, the main earth removing plate 452 has a "<" shape when viewed from the side. It is designed to touch. The secondary blade 453 is linear in plan view as shown in FIG. 3A, while its lower end portion is bent rearward and contacts the floor surface 43 in side view as shown in FIG. 3C. In addition, in FIG. 3B, the main blade 452 and the sub blade 453 are omitted.

A driven shaft 455 extending in the width direction of the slope 42 is connected to the drive shaft of the motor 454 , and pinions 456 are attached to both ends of the driven shaft 455 . The pinion 456 is meshed with a rack (not shown) provided on the upper surface of a flat plate-like member (not shown) horizontally protruding from the side wall 44 of the slope 42 toward the earth removing device 45 side. The flat member extends in the length direction of the slope 42 . As a result, the frame 451 can move back and forth along the length of the slope 42 by engaging the pinion 456 rotated by the motor 454 with the rack.

Further, the frame 451 has ground rollers 457 on the four corners of the bottom surface, which are in contact with the floor surface 43 of the slope 42 , and a pair of side rollers 458 on both side surfaces, which are in contact with the side walls 44 of the slope 42 . The ground roller 457 and the side roller 458 contact the floor surface 43 or the side wall 44 and rotate together with the advance and retreat of the earth removing device 45 , so that the attitude of the frame 451 is adjusted to the floor surface 43 and the side wall of the slope 42 . parallel to 44.

Next, referring to FIG. 4, the configuration of the lift 48 will be described.

The lift 48 includes a first frame 481 surrounding the container 47, a second frame 483 installed on the first frame 481, and rail members supported by the first frame 481 and the second frame 482. 483 and a motor block 484 as a moving means attached to the upper part of the second frame 482 to move the first bucket 46 a along the rail member 483 .

The first frame 481 consists of four pillars 485 erected vertically on the ground surface at predetermined intervals with respect to the four corners of the container 47, and a beam 486 horizontally connecting the upper ends of the pillars 485 and 485. The long side of the rectangular shape has a length that accommodates the length of the slope 42 in the width direction. The second frame 482 is composed of four pillars 487 erected vertically on the beams 486 of the first frame 481 and a beam 488 horizontally connecting the upper ends of the pillars 487 , 487 . The second frame 482 is provided on the slope 42 side on the first frame 481 , and in the direction parallel to the length direction of the slope 42 , the distance between the pillars 487 and 487 is the pillars 485 and 487 of the first frame 481 . It is narrower than the 485 interval.

The rail members 483 are provided at positions sandwiching the slope 42 in the width direction of the slope 42 , forming a pair on both sides of the slope 42 . The pair of rail members 483, 483 are provided so that the surfaces facing each other are in contact with the outer surface of the side surface 461 of the first bucket 46a parallel to the slope 42, and are angled at a predetermined angle, for example, 3 to 3 to the vertical direction. It is provided with a straight portion 489 that stands obliquely at an angle of 10° and is supported by the first frame 481 and the second frame 482, and a curved portion 490 that curves downward in the direction of inclination at the upper end of the straight portion 489. .

The motor block 484 is a chain block that drives the chain by a motor, and is provided on each beam 488 parallel to the length direction of the slope 42 of the second frame 482 . The motor block 484 includes a motor block body 491 containing a plurality of gears (not shown) and a motor for rotating the gears, an upper hook 492 directly connected to the motor block body 491, and a chain 493 attached to the motor block body 491. and a lower hook 494 connected via. The upper hook 492 is engaged with an engaging member 495 provided on the beam 488 of the second frame 482, and the lower hook 494 is engaged with an engaging member 463 provided on the slope 42 side of the bottom side surface of the first bucket 46a. Locked. The chain 493 is wound around a plurality of gears built in the motor block body 491, and is extended or retracted from the motor block body 491 by rotationally driving the gears by the motor.

Here, the first bucket 46 a has a diagonal member 464 parallel to the rail member 483 on the outer surface of the side surface 461 of the slope 42 parallel to the slope 42 . Therefore, when the chain 493 is pulled into the motor block body 491 , the first bucket 46 a is lifted while the skew member 464 is in contact with the rail member 483 and moves upward along the rail member 483 .

Next, the operation of the dry distillation gasification incineration treatment apparatus 1 of this embodiment and the ash removal system will be described.

In the dry distillation gasification incineration treatment apparatus 1 of the present embodiment, when incinerating the waste A, for example, while the waste A is dry distilled in the first dry distillation furnace 2a to generate combustible gas, the first In the dry distillation furnace 2b of No. 2, new waste is accommodated after the completion of the removal of the ash, and dry distillation of the waste is prepared. Ashing and removing the ash are performed. When the generation of the combustible gas is completed in the first dry distillation furnace 2a, the waste A is dry distilled in the second dry distillation furnace 2b to generate combustible gas, and during this period the third dry distillation furnace 2c is used. In the first dry distillation furnace 2a, the waste is incinerated and the ash is removed in the first dry distillation furnace 2a. As a result, the dry distillation furnaces 1a, 2b and 2c can be continuously operated.

In this embodiment, the waste A is dry distilled in the first dry distillation furnace 2a to generate combustible gas, and after the ash removal is completed in the second dry distillation furnace 2b, dry distillation of new waste is prepared, The operation of the dry distillation gasification and incineration treatment apparatus 1 will be described assuming that the third dry distillation furnace 2c performs the incineration of the waste and the removal of the ash.

In this case, in the first dry distillation furnace 2a, first, with the bottom plate members 202a and 202b of the bottom door 7a closed, the input door 5a of the dry distillation furnace 2a is opened, and the waste A such as waste tires is dry-distilled from the input port 6a. It is put into the furnace 2a. Next, when the controller 15 completes charging the waste A into the dry distillation furnace 2a and detects that the dry distillation furnace 2a contains the waste A, the charging door 5a is closed to allow the inside of the dry distillation furnace 2a to move. Preheating of the combustion furnace 4 is started by operating the combustion device 25 of the combustion furnace 4 after the sealed state.

Next, when the temperature in the combustion furnace 4 gradually rises to, for example, 760° C., the control device 15 drives the valve driver 14a to open the control valve 13a to a predetermined degree of opening, for example, 25%. The supply of oxygen (air) to 2a is started. Next, when the control device 15 detects that the introduction of the waste A into the dry distillation furnace 2a is completed, that the waste A is contained in the dry distillation furnace 2a, and that the damper 21a is opened, The ignition device 16a of the dry distillation furnace 2a is actuated to ignite the waste A, and partial combustion of the waste A is started.

Next, in the dry distillation furnace 2a, the controller 15 controls the valve driver 14a to increase the opening of the control valve 13a in stages. Along with this, the partial combustion of the waste A in the dry distillation furnace 2a gradually expands and stabilizes, forming a grate at the bottom of the waste A. When the fire bed is formed, the igniter 16a is turned off, and the heat of partial combustion of the waste A begins dry distillation of another portion of the waste A, and the generation of combustible gas begins. is introduced into the burner section 19 through the gas passage 3a.

In the burner unit 19 , the control device 15 drives the valve driver 24 to set the opening degree of the control valve 23 to a predetermined opening degree, and oxygen is supplied from the oxygen supply source 12 through the oxygen supply passage 11 and the combustion oxygen supply passage 22 . (air) is supplied. Therefore, the combustible gas is mixed with oxygen (air) supplied through the combustion oxygen supply passage 22, ignited by combustion flame supplied from the combustion device 25, and combustion in the combustion section 20 is started. .

When the generation of combustible gas in the dry distillation furnace 2a becomes active and the combustible gas starts spontaneous combustion in the combustion furnace 4, the temperature in the combustion furnace 4 gradually rises to a preset first temperature (hereinafter referred to as , referred to as the first set temperature), for example 930°C.

When the temperature in the combustion furnace 4 reaches the first set temperature due to the combustion of the combustible gas, the combustion device 25 is stopped, and the control device 15 controls the temperature in the combustion furnace 4 due to the combustion of the combustible gas. The opening of the control valve 13a is adjusted so that the temperature is maintained at the first set temperature, and the generation of the combustible gas in the dry distillation furnace 2a is feedback-controlled.

Combustion exhaust gas generated by combustion of the combustible gas in the combustion unit 20 is cooled by the hot water boiler 28 and discharged to the duct 29a, or is discharged to the duct 29a via the duct 29f without passing through the hot water boiler 28. be done.

When the combustion exhaust discharged to the duct 29a passes through the hot water boiler 28, it is introduced from the duct 29a into the air-cooled heat exchanger 31, further cooled, and discharged to the duct 29b. When the water does not pass through the hot water boiler 28, it is introduced from the duct 29c into the quenching tower 34, cooled, and discharged to the duct 29b through the duct 29d.

Next, the combustion exhaust discharged to the duct 29b is mixed with slaked lime and activated carbon supplied from the chemical silo 38 to be desulfurized and deodorized, introduced into the bag filter 37, and after ash, dust, etc. are removed, It is discharged to the duct 29e and further discharged to the atmosphere from the chimney 40.

When dry distillation gasification in the dry distillation furnace 2a progresses and most of the waste A that can generate combustible gas is lost in the dry distillation furnace 2a, the combustible gas generated in the second dry distillation furnace 2b is released into the combustion furnace 4. , and the combustible gas generated in the second dry distillation furnace 2 b is burned in the combustion furnace 4 . After that, when the waste A, which can generate combustible gas by dry distillation, is completely lost in the dry distillation furnace 2a, the control device 15 controls the opening of the control valve 13a through the valve driver 14a to a predetermined opening, For example, it is maintained at 70% to incinerate the waste A in the dry distillation furnace 2a. After the waste A is incinerated, the control device 15 reduces the opening of the control valve 13a at a predetermined rate through the valve driver 14a until the control valve 13a is closed.

In the dry distillation furnace 2a, when the incineration of the waste A is completed and the control valve 13a is closed, after performing the above-mentioned removal of the ash, new waste A is accommodated, and the waste A is dry distilled. prepare.

Next, taking the case of the dry distillation furnace 2a as an example, the removal of the ash will be described.

When the controller 15 detects that the control valve 13a is closed, the controller 15 determines that the incineration of the waste A in the dry distillation furnace 2a is completed, and causes the surface-active agent aqueous solution spraying means (not shown) to spread the waste material on the bottom door 7a. Spray an aqueous surfactant solution from above the deposited ash. The aqueous surfactant solution contains, for example, a dishwashing detergent at a concentration of 40% by mass, and foams when sprayed from the aqueous surfactant solution spraying means to envelop the ash with foam. can permeate from the surface to the inside of the ash and moisten the ash.

When the spraying of the aqueous surfactant solution is completed, the motor blocks 209a and 209b are then synchronized as shown in FIG. 202 b is hung and swung downward to open the bottom 201 and drop the ashing material onto the floor 43 of the slope 42 . In this case, when the ashing matter is large, the operation of the motor blocks 209a and 209b may be adjusted to gradually swing the bottom plate members 202a and 202b downward by a predetermined degree of opening. By doing so, even if the amount of the ash is large, the entire amount of the waste can be reliably dropped onto the floor surface 43 without imposing a burden on the apparatus.

When the entire amount of the waste is dropped onto the floor surface 43 and the ash removal from the dry distillation furnace 2a is completed, the chains 212a and 212b are pulled into the motor block bodies 210a and 210b to lift the bottom plate members 202a and 202b. The bottom 201 is closed by rocking it upwards.

On the other hand, on the slope 42, the motor 454 of the earth removing device 45 is driven to move the frame 451 forward. "Advancing the frame 451" means moving the frame 451 downstream of the slope 42 (toward the first bucket 46a). It means moving the body 451 to the upstream side of the slope 42 (the second bucket 46b side).

Since the unloading device 45 is normally on standby at the upstream end of the slope 42 , when it is advanced as described above, the ash that has fallen onto the floor surface 43 is pushed down the slope 42 by the main unloading plate 452 . It is pushed downstream and discharged into a first bucket 46 a located below the downstream end of the slope 42 . After the ash has been discharged to the first bucket 46a, the soil removing device 45 is retracted and returns to the standby position at the upstream end of the slope 42. As shown in FIG.

The main discharging plate 452 discharges the ash that has fallen onto the floor 43 to the first bucket 46a. You can do it, or you can do it several times at once. When the main earth removal plate 452 pushes the ash to the downstream side of the slope 42, if there is a large amount of the ash, a part of the ash may climb over the upper edge of the main earth removal plate 452 and the main discharge. It is conceivable that it will fall behind the earth plate 452 . However, when the earth removing device 45 is retracted and returns to the standby position at the upstream end of the slope 42 , the ash that has fallen behind the main earth removing plate 452 is removed from the slope 42 by the auxiliary earth removing plate 453 . and can be dispensed into a second bucket 46b located below the upstream end of the ramp 42. As a result, the ash that has fallen onto the floor surface 43 is discharged into either the first bucket 46a or the second bucket 46b.

Next, after the ash has been discharged to the first bucket 46a, the motor blocks 484, 484 of the lift 48 are synchronized to pull the chain 493 into the motor block body 491. By doing so, the oblique member 462 provided on the side surface 461 of the first bucket 46a abuts against the rail member 483, and the first bucket 46a is lifted in this state and moved upward along the rail member 483. Moving. At this time, since the rail member 483 has the curved portion 490 at the upper end portion of the straight portion 489, the first bucket 46a is locked by the locking member 461 provided on the slope 42 side of the bottom side surface of the first bucket 46a. When the lower hook 494 is lifted by the chain 493 , it is reversed along the curved portion 490 , and the ash stored inside drops into the container 47 and is transferred. Incidentally, the container 47 may have a hopper at the top.

The process of transferring the ash stored in the first bucket 46a to the container 47 may be performed each time the ash from each dry distillation furnace 2a, 2b, 2c is discharged to the first bucket 46a. You can do it in batches. Since the first bucket 46a returns to the upright state by its own weight after transferring the ashed matter that has been reversed and stored in the container 47 as described above, the chain 493 can be let out from the motor block body 491. Thus, the rail member 483 can descend along the straight portion 489 and return to the position below the downstream end of the slope 42 . At this time, the bottom portion of the first bucket 46a may be made heavier than the top portion. Advantageously, the actuation descending along can be performed.

DESCRIPTION OF SYMBOLS 1... Dry distillation gasification incineration apparatus 2a, 2b, 2c... Dry distillation furnace 4... Combustion furnace 7... Bottom door 42... Ash transport path 45... Discharging means 46a... First ash storage means, 47 First ash containing means, 48 Transfer means, 209a, 209b Lifting means.

Claims (5)

A plurality of dry distillation furnaces for burning part of the stored waste while dry distilling the rest of the waste with the combustion heat to sequentially generate combustible gas, and burning the combustible gas introduced from the dry distillation furnace. A method for removing ash from a dry distillation gasification incineration equipment comprising a combustion furnace for
When all the waste in the dry distillation furnace is incinerated into ash, a step of spraying an aqueous solution of a surfactant on the ash deposited on the bottom of the dry distillation furnace;
The bottom is opened by suspending a pair of bottom doors and opening them vertically like double doors, and the ash is placed on a line connecting the bottoms of the multiple dry distillation furnaces, from the upstream side to the downstream side. a step of dropping the ash onto an ash transport path comprising a floor surface with a slope that gradually descends and side walls that stand up on both sides of the floor surface ;
a step of closing the bottom portion by lifting a pair of bottom doors opened like double doors after dropping the ash onto the ash transport path;
a step of discharging the ash that has fallen onto the ash conveying path to first ash containing means provided below the downstream end of the ash conveying path;
and a step of transferring the ash stored in the first ash storage means to the second ash storage means. 2. The ash removal method for a dry distillation gasification incineration apparatus according to claim 1, wherein when the ash is dropped onto the ash transport path, the opening of the bottom of the dry distillation furnace is adjusted and divided into a plurality of stages. A method for removing ash from a dry distillation gasification and incineration treatment equipment, characterized in that it is opened by A plurality of dry distillation furnaces for burning part of the stored waste while dry distilling the rest of the waste with the combustion heat to sequentially generate combustible gas, and burning the combustible gas introduced from the dry distillation furnace. An ash removal system for a dry distillation gasification incineration treatment apparatus comprising a combustion furnace for
a pair of bottom doors provided at the bottom of the dry distillation furnace for opening and closing the bottom like a double door by swinging up and down;
lifting and hanging means for lifting or hanging the pair of bottom doors to make them swingable;
a surfactant aqueous solution spraying means provided in the dry distillation furnace for spraying an aqueous solution of a surfactant to the ash of the waste deposited on the bottom door;
an ash conveying path having a floor surface that is located on a line that connects the bottoms of the plurality of dry distillation furnaces and that gradually descends from the upstream side to the downstream side, and side walls that stand up on both sides of the floor surface;
a dispensing means for moving the ash along the ash transport path and dispensing the ash to first ash storage means provided below the downstream end of the ash transport path;
An ash removal system for a dry distillation gasification incineration apparatus, characterized by comprising transfer means for transferring the ash stored in the first ash storage means to the second ash storage means. . 4. An ash removing system for a dry distillation gasification incineration treatment apparatus according to claim 3, wherein said removing means comprises a frame which is provided so as to move back and forth along said conveying path for ash, and an earth removal plate attached to said frame. An ash removal system for a dry distillation gasification incinerator, comprising : 5. An ash removal system for a dry distillation gasification incineration apparatus according to claim 3 or claim 4, wherein said transfer means comprises a straight portion which is inclined at a predetermined angle with respect to the vertical direction, and an upper end portion of said straight portion. A dry distillation gasification and incineration process characterized by comprising a pair of rail members having curved portions curved downward in an inclined direction, and moving means for moving the first ash containing means along the rail members. Equipment ash removal system.

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