Ash discharge system for dry-distillation gasification incineration device

Abstract

To provide an ash discharge system for a dry-distillation gasification incineration device, capable of preventing ash from remaining inside a protruding row even when the protruding row is formed on the bottom door, corresponding to the bottom of a dry-distillation furnace.SOLUTION: An ash discharge system 51 is used in a dry distillation gasification incineration device 1 comprising a dry distillation furnace 2a and a combustion furnace 4 combusting combustible gas, and comprises a bottom door 7a disposed on the bottom of the dry distillation furnace 2a, bottom door lifting / lowering means 53 of lifting / lowering the bottom door 7a, ash discharge means 62 of discharging ash B, ash storing means 66 of storing the discharged ash B, and cleaning means 63 of cleaning the ash B remaining on the bottom door 7a. The cleaning means 63 comprises scraping means 64 of moving along a protruding row 54c formed on the bottom door, to scrape the ash B remaining inside the protruding row 54c.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an ash discharge system for a dry distillation gasification incineration treatment plant. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a dry distillation / gasification incineration processing apparatus that includes a dry distillation furnace and a combustion furnace, and introduces combustible gas generated in the dry distillation furnace into the combustion furnace for complete combustion (see, for example, Patent Document 1).

[0003] In the dry distillation / gasification incineration treatment device, a part of the waste such as waste tires stored in the dry distillation furnace is burned, and the remaining part of the waste is dry-distilled (pyrolyzed) by the combustion heat to generate combustible gas, and the combustible gas generated by the dry distillation / gasification is introduced from the dry distillation furnace to the combustion furnace for combustion. When there is no part of the waste stored in the dry distillation furnace that can generate combustible gas by dry distillation, the waste is incinerated in the dry distillation furnace to become ash.

[0004] Since the dry distillation gasification incineration treatment apparatus is of a batch type, once the waste contained in the dry distillation furnace is incinerated into ash, the ash must be removed from the dry distillation furnace in preparation for the next waste treatment. In this application, the operation of removing the ash from the dry distillation furnace is referred to as "ash removal."

[0005] The bottom of the dry distillation furnace is equipped with a bottom door that can be opened and closed freely, and the ash is removed by lowering the bottom door and manually removing the ash that has accumulated on the bottom door.

[0006] However, when the bottom door of the dry distillation furnace is lowered, fine ash particles fly out, and workers are forced to work in poor conditions, making manual removal of the ash extremely troublesome.

[0007] Furthermore, since the dry distillation gasification incineration treatment apparatus is of a batch type as described above, continuous operation is being considered, for example, by alternately operating two dry distillation furnaces. In this case, while one dry distillation furnace is dry distilling and gasifying waste, the other dry distillation furnace must be ash-removed, waste to be used in the next dry distillation and gasification must be charged, and part of the waste must be ignited to form a firebed, in preparation for the next dry distillation and gasification.

[0008] Therefore, the applicant has proposed an ash removal system for a dry distillation gasification incineration processing device that can automatically remove ash in a short period of time without scattering ash materials when lowering the bottom door of the dry distillation furnace and without relying on human power (see Patent Document 2 below). [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2015-143615 A [Patent Document 2] Patent No. 6889904 Summary of the Invention [Problem to be solved by the invention]

[0010] The bottom door has an annular protrusion that corresponds to the bottom of the furnace in order to ensure airtightness of the furnace when closing the bottom of the furnace. Therefore, ash deposits also adhere to the inside of the protrusion of the bottom door. Although the ash deposits on the bottom door can be removed by the above-mentioned conventional ash removal system, the ash deposits that adhere to the inside of the protrusion remain.

[0011] If ash or other debris remains inside the ridges, when the ash outlet door is closed it will become jammed and create a gap, making it impossible to maintain airtightness. This will make it impossible to adjust the amount of air supplied to the dry distillation furnace, and may result in abnormal combustion.

[0012] Therefore, manual work such as sweeping with a broom, blowing with an air gun, or washing with water was required, which was inconvenient and time-consuming.

[0013] In view of the above, an object of the present invention is to provide an ash removal system for a dry distillation gasification incineration processing apparatus that can automatically remove ash material adhering to the inside of a protrusion on a bottom door that corresponds to the bottom of a dry distillation furnace. [Means for solving the problem]

[0014] In order to achieve the above object, the present invention provides an ash removal system for a dry distillation gasification incineration treatment apparatus, comprising a dry distillation furnace for burning a portion of stored waste while dry distilling the remaining portion of the waste by the heat of combustion to generate combustible gas, and a combustion furnace for burning the combustible gas introduced from the dry distillation furnace, the ash removal system including a bottom door for closing the bottom of the dry distillation furnace in an openable and closable manner, a bottom door lifting means for lifting and lowering the bottom door relative to the bottom of the dry distillation furnace, and a bottom door lifting means for lifting and lowering the bottom door from one side to the other side of the bottom door that has been lowered from the bottom of the dry distillation furnace by the bottom door lifting means, and a bottom door lifting means for lifting and lowering the bottom door from one side to the other side before being piled up on the bottom door. The furnace is equipped with an ash discharge means for discharging the ash from above the bottom door, an ash storage means arranged below the bottom door for storing the ash discharged from above the bottom door, and a cleaning means for moving from one side of the bottom door from which the ash has been discharged by the ash discharge means to the other side to clean the ash remaining on the bottom door, wherein the cleaning means comprises a scraping means for moving along a protrusion formed on the bottom door along the contour of the bottom of the dry distillation furnace and scraping off the ash remaining on the inside of the protrusion.

[0015] According to the present invention, even if the bottom door is provided with a protrusion and ash remains near the inside of the protrusion, the scraping means moves along the protrusion and scrapes off the ash remaining on the inside of the protrusion, thereby preventing the ash from remaining on the bottom door.

[0016] In addition, in the present invention, the scraping means is characterized by having a tracing mechanism that moves in a manner that traces the protrusion by combining movement in a first movement direction along the movement direction of the ash discharge means and movement in a second movement direction perpendicular to the first movement direction.

[0017] The tracing mechanism realizes movement along the ridge by combining movement in a first movement direction along the movement direction of the ash dispensing means and movement in a second movement direction perpendicular to the first movement direction. That is, the tracing mechanism can make the trajectory of the scraping means correspond to the shape of the ridge by moving the scraping means in the second movement direction according to the amount of movement of the scraping means in the first movement direction. This allows the scraping means to move with high precision so as to trace the ridge. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a system configuration diagram showing the configuration of a dry distillation gasification incineration treatment apparatus used in the present invention. [Diagram 2] FIG. 2 is an explanatory cross-sectional view showing the configuration of an ash discharge system of the dry distillation gasification incineration treatment apparatus of the present invention. [Diagram 3] FIG. 2 is a plan view showing the configuration of the waste discharge means and cleaning means in the ash discharge system of the dry distillation gasification incineration treatment apparatus of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] An embodiment of the present invention will be described with reference to the drawings. The ash removal system of this embodiment can be suitably adopted in, for example, a dry distillation gasification incineration treatment apparatus 1 having the configuration shown in FIG.

[0020] First, we will explain the configuration of the dry distillation gasification incineration processing apparatus 1. The dry distillation gasification incineration processing apparatus 1 is equipped with two dry distillation furnaces 2a and 2b that store waste A such as waste tires and perform dry distillation, gasification, and incineration, and a combustion furnace 4 that is connected to the dry distillation furnaces 2a and 2b via gas passages 3a and 3b.

[0021] The dry distillation furnaces 2a and 2b have upper surfaces provided with inlets 6a and 6b each having an openable / closable input door 5a and 5b, respectively. Waste A is input into the dry distillation furnaces 2a and 2b through the inlets 6a and 6b.

[0022] Bottom doors 7a, 7b that can be opened and closed are provided at the bottom of the dry distillation furnaces 2a, 2b. When the input doors 5a, 5b and the bottom doors 7a, 7b are closed, the inside of the dry distillation furnaces 2a, 2b is substantially isolated from the outside.

[0023] Vacant chambers 8a, 8b isolated from the interiors of the dry distillation furnaces 2a, 2b are formed below the bottom doors 7a, 7b, and the vacant chambers 8a, 8b are connected to the interiors of the dry distillation furnaces 2a, 2b via multiple air supply nozzles 9a, 9b provided in the bottom doors 7a, 7b.

[0024] Dry distillation oxygen supply passages 10a and 10b are connected to the lower empty chambers 8a and 8b of the dry distillation furnaces 2a and 2b, respectively, and the dry distillation oxygen supply passages 10a and 10b are connected to an oxygen supply source 12 constituted by a forced draft fan or the like via an oxygen supply passage 11.

[0025] The dry distillation oxygen supply lines 10a, 10b are provided with control valves 13a, 13b, and the openings of the control valves 13a, 13b are controlled by valve drivers 14a, 14b. In this case, the valve drivers 14a, 14b are controlled by a control device 15 constituted by an electronic circuit including a CPU, etc.

[0026] Furthermore, ignition devices 16a and 16b for igniting the waste A contained in the dry distillation furnaces 2a and 2b are attached to the lower portions of the dry distillation furnaces 2a and 2b, respectively. The ignition devices 16a and 16b are composed of ignition burners or the like, and supply a combustion flame to the waste A by burning fuel supplied from fuel supply devices 17a and 17b via fuel supply paths 18a and 18b.

[0027] The combustion furnace 4 comprises a burner section 19 for mixing the combustible gas produced by the dry distillation of the waste A with oxygen (air) necessary for its complete combustion, and a combustion section 20 for burning the combustible gas mixed with oxygen (air), and the combustion section 20 is connected to the burner section 19 on the downstream side of the burner section 19. Gas passages 3a and 3b are connected to the upstream side of the burner section 19 via dampers 21a and 21b, respectively, and the combustible gas produced by the dry distillation of the waste A in the dry distillation furnaces 2a and 2b is introduced into the burner section 19 via the gas passages 3a and 3b.

[0028] An empty chamber (not shown) isolated from the inside of the burner section 19 is formed on the outer periphery of the burner section 19, and the empty chamber communicates with the inside of the burner section 19 via a plurality of nozzle holes (not shown) drilled on the inner periphery of the burner section 19. A combustion oxygen supply passage 22 branching off from the oxygen supply passage 11 is connected to the empty chamber.

[0029] 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.

[0030] A combustion device 25 is attached upstream of the burner section 19. The combustion device 25 is composed of an ignition burner or the like, and ignites the combustible gas introduced into the burner section 19 or heats the combustion furnace 4 by combusting fuel supplied from a fuel supply device 26 via a fuel supply passage 27.

[0031] A hot water boiler 28 that is heated by exhaust gas burned in the combustion furnace 4 is attached downstream of the combustion section 20. A duct 29a that discharges exhaust gas 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. The exhaust gas cooled by the air-cooled heat exchanger 31 is taken out by a duct 29b that is connected to the lower part of the air-cooled heat exchanger 31 via an on-off valve 32.

[0032] Meanwhile, a duct 29c branches off 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 a quenching tower 34 via an on-off valve 33. The quenching tower 34 is equipped with a spray 35 that sprays water on the combustion exhaust gas introduced from the duct 29c to cool it, and the spray 35 is connected to a water supply device (not shown) that supplies cooling water and an air compressor (not shown).

[0033] The combustion exhaust cooled in the quench tower is taken out through a duct 29d connected to the lower part of the quench tower via an on-off valve. The duct 29d joins with the duct 29b downstream of the on-off valves 32 and .

[0034] Duct 29b is connected to one end of a bag filter 37, and the combustion exhaust gas introduced from duct 29b into bag filter 37 is mixed with hydrated lime and activated carbon supplied from a chemical silo 38 for desulfurization and deodorization.

[0035] A duct 29e is connected to the other end of the bag filter 37. The duct 29e is connected to a chimney 40 via an induced draft fan 39 that draws the combustion exhaust gas from the combustion furnace 4. As a result, the combustion exhaust gas flowing through the duct 29e is released from the chimney 40 into the atmosphere.

[0036] Further, a duct 29f for discharging combustion exhaust gas when the hot water boiler 28 is not used is provided downstream of the combustion furnace 4. The duct 29f is connected to the duct 29a via an on-off valve 41.

[0037] When incinerating waste A in the dry distillation gasification incineration treatment device 1, first, with the bottom door 7a closed, the input door 5a of the dry distillation furnace 2a is opened, and waste A such as waste tires is input into the dry distillation furnace 2a through the input opening 6a.

[0038] Next, when the control device 15 completes the loading of waste A into the dry distillation furnace 2a and detects that waste A is contained in the dry distillation furnace 2a, the loading door 5a is closed to seal the inside of the dry distillation furnace 2a, and then the combustion device 25 of the combustion furnace 4 is operated to begin preheating the combustion furnace 4.

[0039] Subsequently, when the temperature inside the combustion furnace 4 gradually rises and reaches, for example, 760°C, the valve driver 14a is driven by the control device 15 to set the opening degree Va of the control valve 13a to a predetermined opening degree, for example, 25%, and the supply of oxygen (air) to the dry distillation furnace 2a begins.

[0040] Furthermore, when the control device 15 detects that the waste A has been completely fed into the dry distillation furnace 2a, that the waste A is contained in the dry distillation furnace 2a, and that the damper 21a is open, the ignition device 16a of the dry distillation furnace 2a is activated to ignite the waste A, and partial combustion of the waste A is initiated.

[0041] Next, in the dry distillation furnace 2a, the valve driver 14a is controlled by the control device 15 to gradually increase the opening degree Va of the control valve 13a. As a result, the partial combustion of the waste A in the dry distillation furnace 2a gradually expands and stabilizes, and a fire bed is formed at the bottom of the waste A. When the fire bed is formed, the ignition device 16a is stopped, and the heat from the partial combustion of the waste A starts the dry distillation of the other parts of the waste A, starting the generation of combustible gas, which is introduced into the burner section 19 via the gas passage 3a.

[0042] In the burner section 19, the control device 15 drives the valve driver 24 to set the opening of the control valve 23 to a predetermined opening, and oxygen (air) is supplied from the oxygen supply source 12 via the oxygen supply path 11 and the combustion oxygen supply path 22. There, the combustible gas is mixed with the oxygen (air) supplied via the combustion oxygen supply path 22 and ignited by the combustion flame supplied from the combustion device 25, and combustion in the combustion section 20 is started.

[0043] When the generation of combustible gas in the dry distillation furnace 2a becomes active and the combustible gas begins to combust naturally in the combustion furnace 4, the temperature inside the combustion furnace 4 gradually rises and reaches a preset first temperature (hereinafter referred to as the first set temperature), for example 930°C.

[0044] When the temperature inside 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 adjusts the opening degree Va of the control valve 13a so that the temperature inside the combustion furnace 4 is maintained at the first set temperature through the combustion of the combustible gas, thereby feedback-controlling the generation of the combustible gas in the dry distillation furnace 2a.

[0045] The combustion exhaust gas generated by the combustion of the combustible gas in the combustion section 20 is cooled in 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.

[0046] If the combustion exhaust gas discharged into duct 29a has passed through hot water boiler 28, it is introduced from duct 29a into air-cooled heat exchanger 31 where it is further cooled and then discharged into duct 29b. If the combustion exhaust gas has not passed through hot water boiler 28, it is introduced from duct 29c into quench tower 34 where it is cooled and then discharged into duct 29b via duct 29d.

[0047] The combustion exhaust gas discharged into duct 29b is then mixed with slaked lime and activated carbon supplied from a chemical silo 38 for desulfurization and deodorization, introduced into a bag filter 37 to remove ash, dust, etc., and then discharged into duct 29e and further released into the atmosphere from a chimney 40.

[0048] As the distillation and gasification in the dry distillation furnace 2a progresses and most of the waste A capable of generating combustible gas in the dry distillation furnace 2a is lost, the combustible gas generated in the second dry distillation furnace 2b is introduced into the combustion furnace 4, and the combustible gas generated in the second dry distillation furnace 2b is combusted in the combustion furnace 4.

[0049] Thereafter, when the waste A capable of generating combustible gas by dry distillation in the dry distillation furnace 2a is completely lost, the control device 15 maintains the opening degree of the control valve 13a at a predetermined opening degree, for example, 70%, via the valve driver 14a, and incinerates the waste A in the dry distillation furnace 2a. Then, after the waste A is incinerated, the control device 15 reduces the opening degree of the control valve 13a at a predetermined rate via the valve driver 14a until the control valve 13a is closed.

[0050] In the dry distillation furnace 2a, when the incineration of the waste A is completed and the control valve 13a is closed, the bottom door 7a is lowered to discharge the incinerated material (ash removal), and then the bottom door 7a is returned to its original position. Then, the input door 5a is opened, and waste A such as waste tires is input into the dry distillation furnace 2a through the input port 6a to prepare for the next processing.

[0051] Next, an ash removal system 51 according to the gist of the present invention will be described with reference to Figures 2 and 3. Although only the dry distillation furnace 2a is shown and described in Figures 2 and 3, the dry distillation furnace 2 has exactly the same configuration as the dry distillation furnace 2a and operates in exactly the same manner.

[0052] The ash removal system 51 of this embodiment includes a bottom door 7a provided at the bottom of the dry distillation furnace 2a, and a cylinder 53 serving as bottom door lifting means for lifting and lowering the bottom door 7a.

[0053] The bottom door 7a is provided with a rectangular tray 54 extending outward from its outer edge in order to prevent the ash B from falling around it when it is lowered by the cylinder 53. The tray 54 is provided so as to be flush with the upper surface of the bottom door 7a (the surface that becomes the bottom of the dry distillation furnace 2a), and is provided with a pair of side wall members 54a, 54b on opposite sides of the rectangle.

[0054] The side wall members 54a, 54b are provided at positions outside the dry distillation furnace 2a so as not to interfere with the dry distillation furnace 2a when the bottom door 7a closes the bottom of the dry distillation furnace 2a.

[0055] The bottom door 7a is provided with an annular protrusion 54c that protrudes in an annular shape along its contour (the boundary between the bottom door 7a and the tray 54). The annular protrusion 54c acts as a packing for sealing the gap between the bottom door 7a and the dry distillation furnace 2a when the bottom door 7a abuts against the bottom of the dry distillation furnace 2a.

[0056] The cylinders 53 are, for example, hydraulic cylinders, and for example, four cylinders 53 are arranged on a base 53a so that the bottom door 7a can be supported at multiple points. Note that the ash removal system 51 may be equipped with a pantograph jack or the like instead of the cylinders 53 as a bottom door lifting and lowering means.

[0057] In addition, the ash removal system 51 of this embodiment includes a pair of first rail members 55, 56 arranged one above each side of the bottom door 7a when the bottom door 7a is lowered by the cylinder 53 to a predetermined ash removal position (hereinafter referred to as the ash removal stage), and a frame body 57 arranged to be movable from one side of the bottom door 7a to the other along the first rail members 55, 56.

[0058] In the ash discharge stage, the bottom door 7a is arranged so that the side wall members 54a, 54b of the tray 54 are housed inside the first rail members 55, 56 and are parallel to the first rail members 55, 56.

[0059] As shown in FIG. 2 as an example of first rail member 55, the first rail members 55, 56 have an etched steel shape in which an upper plate member 55a and a bottom plate member 55b are connected by a column member 55c, and a rack 58 is provided on the underside of the bottom plate member 55b.

[0060] On the other hand, the frame body 57 includes sliding members 57a, 57b that slide along the first rail members 55, 56, a connecting member 57c that connects the sliding members 57a, 57b below, and a reinforcing member 57d that is obliquely provided from the sliding member 57a or the sliding member 57b to the connecting member 57c.

[0061] As shown in Figures 2 and 3 as an example of sliding member 57a, sliding members 57a, 57b are provided with a pinion gear 59 that meshes with rack 58 and a roller 60 that is in rollable contact with the upper surface of bottom plate member 55b, and are configured to clamp and hold bottom plate member 55b between pinion gear 59 and roller 60.

[0062] The rollers 60 are disposed at the front and rear of the sliding members 57a and 57b. A rotary encoder (not shown) for measuring the amount of movement of the frame body 57 is connected to the rotation shaft of the pinion gear 59. Although not shown, the amount of movement of the frame body 57 may be measured by a laser distance measuring device other than the rotary encoder, or the rotary encoder and the laser distance measuring device may be used in combination.

[0063] Further, the frame 57 is provided with a blade 62 as an ash removal means for removing the ash B accumulated on the bottom door 7a.

[0064] Furthermore, the frame 57 is provided with a cleaning means 63 behind the blade 62 for cleaning the ash B remaining on the bottom door 7a after the ash B has been swept away by the blade 62. As shown in Fig. 3, the cleaning means 63 is provided with a scraping member 64 such as a rotating brush as a scraping means, and a tracing mechanism 65 for moving the scraping member 64 so as to trace the annular ridge 54c.

[0065] The scraping member 64 is not limited to a rotating brush, but may be a nozzle that ejects compressed air, etc., which may be an attachment that can be freely replaced as needed. Alternatively, a suction type so-called vacuum cleaner may be used.

[0066] The tracing mechanism 65 includes second rail members 66, 67 extending in a direction (corresponding to a second moving direction in the present invention, hereinafter referred to as a Y direction) perpendicular to the moving direction (corresponding to a first moving direction in the present invention, hereinafter referred to as an X direction) of the frame 57 and the blade 62, and a moving frame 68 moving along the second rail members 66, 67. A rack 69 is provided on the second rail member 66, and a pinion gear 70 meshing with the rack 69 is supported on the moving frame 68. The pinion gear 70 is rotationally driven by a servo motor (not shown), and the rotation of the pinion gear 70 moves the moving frame 68 in the Y direction. A scraping member 64 is supported on the moving frame 68.

[0067] The servo motor that rotates and drives the pinion gear 70 is controlled by a scraping operation control means (not shown). The scraping operation control means controls the servo motor of the pinion gear 70 using an instruction value indicating the amount of movement in the Y direction calculated based on a value indicating the movement distance in the X direction output by the rotary encoder of the frame body 57 and preset data relating to the planar shape (circular in this embodiment) of the annular protrusion 54c.

[0068] As a result, the movable frame 68 moves in the Y direction in accordance with the amount of movement of the frame body 57 in the X direction, and the scraping member 64 moves along the inside of the annular ridge 54c accordingly. Then, the scraping member 64 moving along the inside of the annular ridge 54c scrapes off the ash B remaining on the inside of the annular ridge 54c.

[0069] In this embodiment, as shown in Fig. 3, the scraping member 64 moves along a semicircular portion on one side of the annular protrusion 54c when the frame 57 advances in the X direction, and moves along a semicircular portion on the other side of the annular protrusion 54c when the frame 57 retreats in the X direction. This makes it possible to clean the entire circumference of the annular protrusion 54c using a single scraping member 64, and can be constructed at a relatively low cost. However, the present invention is not limited to this, and although not shown, two scraping members 64 may be provided.

[0070] In this case, the scraping operation control means 71 moves one scraping member 64 along the semicircular arc on one side of the annular ridge 54c when the frame 57 advances in the X direction, and simultaneously moves the other scraping member 64 along the semicircular arc on the other side of the annular ridge 54c. This makes it possible to perform the scraping operation in a relatively short time.

[0071] Also, there are times when the amount of movement in the Y direction is greater than the amount of movement in the X direction, but within a certain value range of X, the movement speed in the X direction is slow.

[0072] In addition, a formula is used to calculate the Y position for an X position, but the correct position can be obtained by fine-tuning the coefficients depending on the X range for the actual device.

[0073] In addition, the ash removal system 51 of this embodiment is arranged below the bottom door 7a lowered by the cylinder 53, and is equipped with a container 71 as an ash storage means for storing ash B discharged from above the bottom door 7a, and a hopper 71a for guiding the ash B to the container 71.

[0074] As described above, the ash removal system 51 in this embodiment is provided with the cleaning means 63 configured as described above, which not only enables automatic removal of ash from above the bottom door 7a, but also enables the cleaning means 63 to automatically remove ash adhering to the inside of the annular protrusion 54c, thereby preventing ash from remaining on the bottom door 7a.

[0075] In the configuration of this embodiment, by employing rack 58 and pinion gear 59, it is possible to align the ring-shaped ridge by selectively combining a rotary encoder and a motor, or only a servo motor, etc. [Explanation of symbols]

[0076] Reference Signs List: 1... dry distillation gasification incineration treatment device, 2a, 2b... dry distillation furnace, 4... combustion furnace, 7a, 7b... bottom door, 53... cylinder (means for lifting and lowering bottom door), 54c... annular ridge (ridge), 62... blade (means for discharging ash), 63... cleaning means, 64... scraping member (means for scraping), 65... tracing mechanism, 72... container (means for storing ash).

Claims

1. A dry distillation gasification incineration treatment device includes a dry distillation furnace that burns a part of stored waste and dry distills the remaining part of the waste using the heat of combustion to generate combustible gas, and a combustion furnace that burns the combustible gas introduced from the dry distillation furnace, a bottom door for closing the bottom of the dry distillation furnace in an openable and closable manner; a bottom door lifting means for lifting and lowering the bottom door relative to the bottom of the dry distillation furnace; an ash discharge means for discharging the ash accumulated on the bottom door by moving from one side to the other side of the bottom door lowered from the bottom of the dry distillation furnace by the bottom door lifting means; an ash storage means disposed below the bottom door for storing the ash discharged from above the bottom door; a cleaning means for moving from one side of the bottom door from which the ash has been discharged by the ash discharging means to the other side to clean the ash remaining on the bottom door, The ash removal system for a dry distillation gasification incineration treatment device is characterized in that the cleaning means is equipped with a scraping means that moves along a protrusion formed on the bottom door along the contour of the bottom of the dry distillation furnace and scrapes off the ash remaining on the inside of the protrusion.

2. The ash removal system of the dry distillation gasification incineration treatment device as described in claim 1, characterized in that the scraping means is provided with a tracing mechanism that moves along the protrusions by combining movement in a first movement direction along the movement direction of the ash removal means and movement in a second movement direction perpendicular to the first movement direction.

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