JP4012229B2 - Waste asbestos detoxification equipment - Google Patents

Description

  The present invention relates to a detoxifying device for waste asbestos material that melts waste asbestos material that is harmful solid waste.

  Asbestos is a fine fibrous material that has high tensile strength and excellent stability such as excellent alkali resistance. In the past, asbestos has been used in many industrial products such as building materials, disc brakes, and gaskets. It was used.

  However, this asbestos inhales the fine fiber pieces, and when it reaches the alveolar region, the lung tissue is adversely affected and is carcinogenic, especially if it accumulates for about 4 to 7 years. It has been found that it leads to disability (fiber cancer). Therefore, after that, the use is prohibited, and asbestos that has been used in a large amount in the past is removed, and the removed waste asbestos material is made pollution-free and processed continuously.

  As a method for treating the waste asbestos material, many methods are employed in which the waste asbestos material is buried in the ground as it is or is made concrete and buried in the ground. However, in the process of backfilling into the ground, it is a simple pollution avoidance method that does not change the physical properties of the waste asbestos material, and is buried in the ground as it is or with concrete, but includes transportation costs. There is a problem that a large amount of cost is required and a vast land for processing must be secured. Moreover, there is a problem that if the waste asbestos material is exposed to the ground surface due to land development or the like of the backfill site in the future, there is a risk that harmful fiber fragments will be scattered again. In addition, even if it is made concrete and backfilled, the waste asbestos material remains in the form of mineral fibers and remains unchanged, so if it is exposed to the ground surface, only the concrete is weathered or gradually deteriorates due to erosion by rainwater, and the waste asbestos material over time. Will not be a complete treatment method.

  Therefore, paying attention to the fact that when the waste asbestos material is heated above the melting point of its component, succinate, and solidified into a glass, it can be prevented from being scattered as fine fiber pieces. An apparatus has been proposed in which a waste asbestos material accommodated in a plastic accommodation bag is introduced together with the bag from a charging chute so as to melt the asbestos fiber pieces without scattering (see, for example, Patent Document 1). .

Japanese Patent Laid-Open No. 7-171536

  In this melting processing device that is put into the melting furnace as the containment bag, the waste asbestos material is kept in a sealed state so that scattering can be prevented. However, every time the containment bag is put in, the heat load of the melting furnace increases rapidly and becomes wavy. As a result, there is a possibility that non-polluted portions cannot be made completely because portions that are not vitrified remain. Further, when the waste asbestos material containing bag is put in, the furnace temperature temporarily decreases, so that there is a problem that it takes time for melting and the processing efficiency is poor. Moreover, this processing time can be shortened by using a large melting furnace equipped with a high-calorie burner, but there is a problem that the processing efficiency increases and energy efficiency decreases.

  The present invention is basically provided with a quantitative supply means that can control the supply of waste asbestos material to a constant amount and suppress heat leakage from the melting furnace, and can be completely melted in a short time and has high reliability of pollution-free. In addition, it is an object to provide a detoxifying device for waste asbestos material that can reduce initial and running costs.

  In order to achieve the above object, in the invention according to claim 1, a supply means for supplying waste asbestos material to a melting furnace, a melting furnace for melting the supplied waste asbestos material at a high temperature to form molten asbestos, and the melting furnace And a take-out section for taking out the solidified stone material discharged from the molten asbestos, the supply means controls the amount of waste asbestos material that increases or decreases to a constant amount, and heat from the melting furnace It has a quantitative supply means for suppressing leakage and supplying it to the melting furnace.

Further, in the invention according to claim 1, the fixed amount supply means is arranged so as to have a receiving hole for receiving the waste asbestos material and a position shift from the receiving hole, and sends the waste asbestos material toward the melting furnace. A lower stationary plate having a feed hole, and a transport disc that is rotatably inserted between the upper stationary plate and the lower stationary plate, and has a receiving hole and a receiving hole that coincides with the feeding hole at different rotational positions by the rotation, Driving means for rotating the conveying board, and the conveying board conveys the waste asbestos material supplied from the receiving hole to the receiving hole to the feeding hole side by rotation driven by the driving means, It sends out toward a melting furnace through the feed hole corresponding to the accommodation hole.

In the invention which concerns on Claim 2, the said melting furnace is opened in the upper surface of the lower small diameter frustoconical shape enclosed by the furnace wall material which consists of a multi-layered refractory material, and the upper surface of this fusion space opens by the said supply means. A plurality of combustions having an asbestos inflow passage through which the waste asbestos material to be supplied flows, and a burner that opens at the peripheral surface of the melting space, blows combustion gas tangentially to the peripheral surface and swirls spirally in the melting space A gas blow-out hole and a discharge passage that opens at the bottom of the melting space and guides the molten asbestos to the take-out portion are formed.

In the invention according to claim 3 , the quantitative supply means has a passage hole aligned vertically with the accommodation hole, and has a heat insulating board that is driven by the driving means and rotates together with the conveying board along the lower surface of the lower stationary board. Further, in the invention according to claim 4 , the supply means sucks and transfers the waste asbestos material, a multicyclone that separates the waste asbestos material being transferred by the suction means, and the multicyclone. And a pulverizer for finely pulverizing the separated waste asbestos material.

In the invention which concerns on Claim 5 , the said supply means further has a filtration means which isolate | separates the waste asbestos material dust which remain | survives in the suction air after waste asbestos material was isolate | separated by the multicyclone, The said filtration means, It is connected to the melting furnace through an auxiliary pipe that directly sends the collected waste asbestos dust collected by filtration, and in the invention according to claim 6 , the take-out section is cooled by receiving the molten asbestos eluted from the melting furnace. And a conveyor for carrying out the stone-like material cooled and solidified in the water-cooled tank.

  In the invention according to claim 1, since a constant amount is constantly supplied to the melting furnace by controlling the waste asbestos material whose input amount increases or decreases by the quantitative supply means, the temperature in the melting furnace is set to the asbestos temperature. Therefore, the waste asbestos material can be completely melted in a short time to make it non-polluting and exhibit high melting processing ability. In addition, since the amount of waste asbestos material supplied to the melting furnace is controlled to be constant, burners equipped in the melting furnace can be used with relatively small thermal power, making the entire melting furnace compact. Yes. Therefore, for example, it is possible to install a processing apparatus in a relatively small space adjacent to the dismantling processing site, and it is possible to reduce the labor and cost of transporting the waste asbestos material. At the same time, the initial cost of the processing apparatus itself can be suppressed and the maintenance work can be reduced.

Further, as in the invention according to claim 1, the receiving hole is rotatably inserted between the upper stationary plate having the receiving hole and the lower stationary plate having the feeding hole, and coincides with the receiving hole and the feeding hole at different rotational positions. The waste asbestos material supplied from the receiving hole to the accommodation hole is conveyed to the feeding hole side by the rotation of the conveying board, and passes through the feeding hole corresponding to the accommodation hole. If it comprises so that it may send out toward a melting furnace, the supply amount of waste asbestos material can be maintained constant by rotation of a conveyance board. In addition, the receiving hole that receives the waste asbestos material and the feeding hole that sends out the waste asbestos material are arranged in a misaligned position, and when one communicates with the accommodation hole of the conveying board, the other is sealed by the conveying board, The heat rising from the melting furnace is cut off, so that heat loss can be reduced and adverse effects due to the heat of the device portion beyond this can be prevented.

As in the invention according to claim 2, when a plurality of combustion gas blowout holes are provided on the peripheral surface of the melting space, and a burner that blows the combustion gas tangentially to the peripheral surface of the melting space is provided in the combustion gas blowout holes, The waste asbestos material is heated and melted by the flames of the combustion gas simultaneously injected from a plurality of burners, and the inside of the melting space is spirally swirled and uniformly stirred. As a result, the waste asbestos material is heated uniformly without unevenness, so that it completely melts in a short time, and the operation efficiency is improved. In addition, the molten asbestos is spirally swirled around the wall surface of the melting furnace formed in the shape of a truncated cone having a lower small diameter by the combustion gas injection pressure to generate a spiral flow, and to the discharge path opened at the bottom. Move smoothly across. As a result, since the molten asbestos that has been sufficiently melted is sequentially discharged, quality defects such as insufficient melting do not occur .

As in the invention according to claim 3 , if a heat insulating board that has a passage hole that aligns vertically with the receiving hole and rotates along with the conveying board along the lower surface of the lower stationary board is provided, the heat rising from the melting furnace is further increased. Since it is reliably cut off, it is possible to prevent heat loss and improve operating efficiency and further improve the reliability of the apparatus.

When the multi-cyclone for separating the sucked waste asbestos material is provided as in the invention according to claim 4 , the processing efficiency can be improved and the scattering of the waste asbestos material dust from the apparatus is suppressed. In addition, if a crusher is provided to finely pulverize the waste asbestos material separated by this multi-cyclone, various waste asbestos materials of different sizes and shapes, such as building materials, pipe covering materials, automobile brakes, etc., can be reduced. It can be processed in a uniform process by grinding. Moreover, the melting time can be shortened by pulverization, and the fluctuations can be reduced to standardize the operation management of the apparatus.

If the filtering means which isolate | separates the waste asbestos material dust which remain | survives in the suction air after isolate | separating waste asbestos material like the invention which concerns on Claim 5 , scattering of the waste asbestos material dust from a processing apparatus will be almost zero. It is possible to ensure safety for workers and to protect the surrounding environment. Moreover, if the waste asbestos dust collected by the filtering means is directly sent to the melting furnace via the auxiliary pipe, the waste asbestos dust that is likely to be scattered is automatically processed, and thus the safety is further improved.

As in the invention according to claim 6, when a water-cooled tank that receives and cools molten asbestos eluted from the melting furnace is provided, the molten asbestos immediately solidifies by water cooling and changes to a stone-like material, so that the processing efficiency is high. At the same time, handling becomes easy. Furthermore, if the conveyor which transfers the said stone-shaped material is provided, the stone-shaped material with a residual heat can be carried out safely and efficiently.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the waste asbestos material detoxifying apparatus 1 supplies waste asbestos material to a melting furnace 2 and melts the supplied waste asbestos material including a supply unit 3 including a quantitative supply unit 5. It has a melting furnace 2 and a take-out part 4 for cooling and taking out the molten asbestos discharged from the melting furnace 2. Further, as shown in FIGS. 2 and 3, the supply means 3 of the present embodiment includes a suction means 21 for transferring the waste asbestos material, a multi-cyclone 22 for separating the waste asbestos material being transferred, and the separated waste asbestos material. And a filtering means 24 for separating the waste asbestos dust floating in the air after separation. A first air duct 31 extends from the multi-cyclone 22 to a charging port (not shown) for waste asbestos material, and is connected to the filtering means 24 by a second air duct 32.

The suction means 21 sucks waste asbestos material from a charging port (not shown) and transfers it to the melting furnace 2. In this embodiment, as shown in FIG. A suction machine 34 connected by an air duct 33 is used. However, due to the negative pressure generated by the suction machine 34, as shown in FIG. 13, the first air duct 31, the multi-cyclone 22, the second air duct 32, the filtering means 24, and the third air duct 33 are introduced from the inlet. A so-called pneumatic feeding system is employed in which an air stream flowing through the air is generated and the waste asbestos material is sucked and transferred by this air stream. In this embodiment, an electric blower having an air volume of about ^{3 to} 10 m ³ / min is used as the suction device 34.

  The multi-cyclone 22 can be separated by swirling an air flow containing waste asbestos material in a cylinder, driving the waste asbestos material to the outer wall side by its centrifugal force, and dropping it along the side wall of the cyclone. When a large number of small cyclones with small diameters are juxtaposed, the separation limit particle size can be reduced. Thus, it is preferable to separate the waste asbestos material that is being pneumatically fed using the multi-cyclone 22 from the viewpoint that the waste asbestos material can be efficiently processed and the scattering of the waste asbestos material dust can be suppressed.

  As shown in FIGS. 4 and 5, the pulverizer 23 includes a sealed flat horizontal cylindrical housing 35, and a pair of shafts 36 that are rotatably supported inside the housing 35 and are arranged in parallel at a distance from each other. 36, a substantially disc-shaped crushing blade 68 that is supported by the opposing shafts 36, 36 and meshes with each other, and a pair of DC or AC that rotationally drives each shaft 36, 36 as shown in FIG. It consists of motors 37 and 37. The pulverizer 23 is disposed immediately below the multicyclone 22, and the upper portion of the housing 35 communicates with the inside of the multicyclone 22 through the upper opening 38U. The waste asbestos material separated by the multi-cyclone 22 naturally falls into the housing 35 from the upper opening 38U and is finely pulverized when passing between the pulverizing blades 68 that rotate while meshing with each other. A lower opening 38 </ b> D for feeding the crushed waste asbestos material is formed in the lower part of the housing 35.

  In this way, when the waste asbestos material is finely pulverized by the pulverizer 23, the building material, which is frequently used for reinforcement and fire resistance, pipe covering materials, automobile brakes and other mechanical parts in general, are treated. It can be melt-processed in the same process without separating different types of waste asbestos materials such as size, shape, or the presence or absence of other blends. Therefore, the apparatus is simplified and the operation of the apparatus is simplified, so that an optimum disposal process can always be performed without requiring skill. Moreover, since the melting time can be greatly shortened by finely pulverizing the waste asbestos material, it is possible to save energy used and to reduce the variation in processing time, thereby standardizing operation management.

  As shown in FIGS. 2 and 3, the filtering means 24 is connected to the multicyclone 22 by the second air duct 32, and waste asbestos material is separated in the multicyclone 22 including pulverized powder generated in the pulverizer 23. In this embodiment, the bag filter 24A is used to separate the waste asbestos dust remaining in the air and filter the air. For the bag filter 24A, a known mechanism is used for purifying by passing contaminated air through a cylindrical base body containing a bag-like filter medium made of woven fabric or non-woven fabric. Thus, by providing the filtering means 24 using the bag filter 24A, the waste asbestos material dust from the processing apparatus is hardly scattered, and as a result, it is possible to ensure the safety of the worker and the maintenance of the surrounding environment. .

  As shown in FIGS. 2 and 7, the bag filter 24A of the present embodiment has a lower end formed in a funnel shape and is connected to an auxiliary pipe 25 extending to the melting furnace 2, and has a handle in the middle of the funnel portion. A shielding plate 40 that can be taken in and out by pushing and pulling 39 is provided. When the separated waste asbestos dust falls and accumulates on the shielding plate 40 at a certain amount, when the shielding plate 40 is pulled out, the waste asbestos dust passes through the auxiliary pipe 25 to the melting furnace 2. Supplied. For this reason, waste asbestos dust that easily scatters can be automatically processed, which is preferable in terms of further improving safety.

  As shown in FIG. 2, the quantitative supply means 5 is continuously installed in the lower part of the lower opening 38D of the pulverizer 23. As shown in FIGS. 8 and 9, the housing 41 and the center of the housing 41 are arranged up and down. A shaft 42 that is inserted and rotatably supported, a driving means 18 that rotates the shaft 42, and a disk-shaped transport board 17 that rotates integrally around the shaft 42 are provided.

  The housing 41 has a main body portion 43 having a short barrel shape with an open top, an upper stationary platen 13 and a lower stationary platen 15 that constitute an upper lid of the main body unit 43 and sandwich the transport platen 17 from above and below. It consists of. The main body 43 has a through hole through which the shaft 42 is inserted at the center of the bottom plate portion 43B, and a bearing bearing 44 that rotatably supports the lower portion of the shaft 42 is provided below the through hole. The bottom plate portion 43 </ b> B is provided with a delivery hole 45 for waste asbestos material, and has a delivery sleeve 46 that extends continuously toward the melting furnace 2 below the delivery hole 45.

  The upper stationary platen 13 and the lower stationary platen 15 have a disk shape with substantially the same diameter as the main body 43, and a through hole through which the shaft 42 is inserted is provided at the center. The upper stationary platen 13 has an annular step portion 47 formed by increasing its outer peripheral edge downward by about 5 to 20 mm. In addition, the upper stationary platen 13 and the lower stationary platen 15 are formed with seal grooves 48 having a depth of about 1 mm on the inner surfaces of the annular stepped portion 47 and the outer side of the through-holes. Further, the upper stationary platen 13 is provided with a receiving hole 12 for receiving the waste asbestos material directly under the lower opening 38D of the crusher 23, and the lower stationary platen 15 is opposite to the receiving hole 12 with the shaft 42 interposed therebetween. It has a feed hole 14 that is aligned vertically with the feed hole 45 of the main body 43 and feeds out waste asbestos material. Then, the lower stationary platen 15 and the upper stationary platen 13 are overlaid on the main body 43 and integrated with bolts (not shown) that are inserted into bolt holes that communicate with each outer peripheral flange. Thus, the housing 41 is configured.

  As described above, the shaft 42 whose lower end is supported by the bearing bearing 44 is inserted into the through holes of the bottom plate portion 43B, the lower stationary platen 15, and the upper stationary platen 13, and the upper end portion thereof is upward from the upper stationary platen 13. Protruding and supported by this upper end portion, a sprocket 49 is attached.

  In this embodiment, the driving means 18 uses a motor 50 and is attached to the upper portion of the housing 41. A drive sprocket 51 is attached to the output shaft of the motor 50, and a chain 67 is bridged between the driven sprocket 49 and a transmission device 52.

  As the motor 50, an AC motor, an induction motor, a DC motor, a brushless motor, a stepping motor, or the like can be used. In this embodiment, an AC motor that operates with a household 100 volt power supply is used, and on / off of the drive, rotation speed, forward rotation / reverse rotation, and the like are controlled by a control circuit. Further, by using a microcomputer, the rotation speed can be gradually increased or decreased according to the program conditions, or the rotation can be controlled by receiving a signal from a sensor that detects a change in load or the like. When a stepping motor is used, it can be controlled by a pulse signal input from the control circuit. Further, when a servo motor is used, the rotation angle can be servo controlled using an electronic circuit.

  In this way, the shaft 50 whose rotation is controlled by the motor 50 and the transmission device 52 is formed with a rectangular rod 53, and on the other hand, a rectangular support hole 54 is formed at the center of the transport board 17. Then, the support hole 54 is extrapolated to the rectangular rod 53 so as not to be relatively rotatable, and is driven by the motor 50 to rotate the transport board 17. In addition, the transport board 17 is rotatably disposed in the gap between the upper stationary board 13 and the lower stationary board 15 formed by the annular step 47.

  Further, between the transport board 17 and the upper stationary board 13 and between the transport board 17 and the lower stationary board 15, each of the annular thin large and small seal ring members 55 </ b> L disposed in the seal groove 48, respectively. 55S is inserted. This sealing material 55 is a sintered alloy containing high-viscosity oil in pores, a special copper alloy obtained by dispersing a solid lubricant mainly composed of graphite, and a lubricating oil and a special filler dispersed inside the resin. The contained polyacetal resin or the like is used to support rotation without rattling while reducing rotational friction of the transport board 17 and seals between the transport board 17 and the upper stationary board 13 and the lower stationary board 15. ing.

  The conveying board 17 is formed with a receiving hole 16 located on the same radius as the receiving hole 12 of the upper stationary board 13 and the feeding hole 14 of the lower stationary board 15. And the conveyance board 17 arrange | positioned between the upper stationary board | substrate 13 and the lower stationary board | substrate 15 rotates continuously, passing the position where the said accommodation hole 16 faces the receiving hole 12 and the feed hole 14 alternately. It should be noted that the control circuit of the motor 50 can perform intermittent continuous rotational motion in which the rotation is temporarily stopped at the position where the receiving hole 16 faces the receiving hole 12 or the feeding hole 14, or the receiving hole 16 May be configured to control the reciprocating reversal movement between the receiving hole 12 and the feeding hole 14.

  Further, in this embodiment, a heat insulating board 20 having a short cylindrical shape having substantially the same diameter as the transport board 17 and having a fitting hole 56 at the center and a passage hole 19 aligned with the accommodation hole 16 of the transport board 17 is provided. The main body 43 of the housing 41 is accommodated. And this heat insulation board 20 rotates integrally with the conveyance board 17 along the lower surface of the lower stationary board 15 in the main-body part 43, when the fitting hole 56 is externally fitted to the shaft 42 so that relative rotation is impossible. Configured as follows. The heat insulating panel 20 is formed using fireproof castable, heat insulating castable, ceramic fiber or the like.

  Thus, when the receiving hole 12 and the accommodation hole 16 are aligned vertically, the waste asbestos material finely crushed from the lower opening 38D of the crusher 23 is supplied into the accommodation hole 16. When the transport board 17 is driven by the motor 50 to rotate, the waste asbestos material accommodated in the accommodation hole 16 is conveyed, and when the accommodation hole 16 and the feed hole 14 reach a position where they are aligned vertically, the waste asbestos material is discarded. Asbestos material passes through the hole 14 and falls toward the melting furnace 2. The operation is repeated as the conveying board 17 continues to rotate, and a certain amount of waste asbestos material is constantly supplied to the melting furnace 2. As a result, the temperature in the melting furnace 2 is kept constant at a high temperature range of about 1300 to 2000 ° C. necessary for melting asbestos, and the waste asbestos material is completely and speedily melted. it can.

  Since the amount of waste asbestos material supplied to the melting furnace 2 is constant, the melting furnace 2 can be miniaturized because it can be sufficiently heated with a small burner having a small maximum thermal power. Therefore, for example, it is possible to install the processing device in a relatively small space such as an open space in the dismantling site, and it is possible to reduce the labor and cost of transporting the waste asbestos material and to suppress the initial cost of the processing device itself, The maintenance work can be reduced.

  Further, when the receiving hole 12 and the feeding hole 14 of the fixed amount supply means 5 are displaced from each other and one of them communicates with the receiving hole 16 of the conveying board 17, the other is sealed by the conveying board 17. The heat rising from 2 is cut off, so that heat loss can be reduced and the adverse effect of heat on the device portion beyond this can be prevented. Further, in this embodiment, since the heat insulating board 20 that rotates along the lower surface of the lower stationary board 15 in conjunction with the transport board 17 is provided, the heat of the melting furnace 2 is more reliably cut off, thereby preventing heat loss. As a result, the operating efficiency can be improved and the reliability of the apparatus can be further increased.

  As shown in FIG. 1, the melting furnace 2 is disposed under the fixed supply means 5 and can melt the supplied waste asbestos material at a high temperature. As shown in FIGS. 11 and 12, the melting furnace 2 includes a melting space 7 surrounded by a furnace wall material 6, an asbestos inflow passage 8 formed in an upper portion, and a plurality of combustion gas outlet holes 10 formed in a side portion. And a discharge path 11 formed in the lower part.

  The furnace wall material 6 of this embodiment has a three-layer structure from the inside to the outside, and a high-performance refractory layer 57 is formed on the innermost side so as to surround the melting space 7. The high-performance fireproof layer 57 is made of a fireproof material such as high alumina (zirconia component 90%) or zirconia (zirconia component 35 to 95%), thereby obtaining fireproof performance against a high temperature of 1300 to 2000 ° C. A semi-refractory layer 58 is provided to cover the outside of the high-performance refractory layer 57. As the quasi-refractory layer 58, a refractory brick, a heat insulating brick, or the like is used, and a thick refractory layer is formed while supporting the high-performance refractory layer 57. Further, by forming an outer refractory layer 59 in which castable, plast, fiber wool, heat insulation board, refractory mortar and the like are further laminated on the outside of the quasi-refractory layer 58, the fire resistance is further improved, and the outer shape of the melting furnace 2 (this embodiment Now we have a cubic shape. Furthermore, the melting furnace 2 of this embodiment covers the whole with a steel plate and arranges the shape steel vertically and horizontally to form a reinforcing frame.

  In the present embodiment, the melting space 7 is covered with the high-performance refractory layer 57, and the bottom is formed in a truncated cone shape having a small diameter. An asbestos inflow passage 8 is provided above the melting space 7 so as to penetrate the furnace wall material 6 vertically. A receiving pipe 60 that communicates with the asbestos inflow passage 8 and rises from the melting furnace 2 and is connected to the lower end of the delivery sleeve 46 is provided. Thus, the waste asbestos material sent out from the fixed amount supply means 5 falls in the vertically arranged delivery sleeve 46, the receiving pipe 60, and the asbestos inflow passage 8 and is supplied into the melting space 7. As shown in FIG. 2, the auxiliary pipe 25 extending from the bag filter 24 </ b> A toward the melting furnace 2 is connected to the receiving pipe 60 obliquely. Accordingly, the waste asbestos dust collected in the bag filter 24A joins the waste asbestos material from the quantitative supply means 5 and is smoothly supplied to the melting furnace 2.

  As shown in FIG. 12, the combustion gas blowing hole 10 is opened in the peripheral surface of the melting space 7 and is formed so as to face the substantially tangential direction of the peripheral surface of the melting space 7. They are separated by an angle. A burner 9 is attached to the outer end of the combustion gas blowing hole 10, and the combustion gas injected from the nozzle of the burner 9 is tangent to the peripheral surface of the melting space 7 from the inner end of the combustion gas blowing hole 10. Since the gas is ejected in the direction, the combustion gas simultaneously ejected from each burner 9 generates a swirling flow of flame, and as a result, the waste asbestos material is heated and melted and swirled in the melting space 7 in a spiral shape and uniformly stirred . Since the waste asbestos material stirred in the spiral flame is heated uniformly without unevenness, the waste asbestos material is completely melted in a short time and the handling efficiency is improved. Further, the melted asbestos smoothly moves toward the discharge passage 11 at the bottom while generating a spiral flow along the frustoconical furnace wall surface by the pressure of the combustion gas injection. As a result, quality defects such as insufficient melting will not occur.

  As shown in FIG. 11, the discharge path 11 is composed of an inclined path 61 extending obliquely downward from the lower end of the melting space 7 and a vertical path 62 branched from the middle of the inclined path 61 and extending downward. Asbestos flows down toward the take-out part 4 by its own weight. The ramp 61 extends beyond the melting furnace 2 to form an inspection port in the furnace, but is usually sealed by fitting a refractory.

  Further, as shown in FIG. 11, an exhaust gas passage 63 extending obliquely upward is formed in the upper part of the melting space 7, and smooth combustion is controlled by promoting exhaust of the combustion gas. As shown in FIG. 1, the tip of the exhaust gas passage 63 is connected to an exhaust device 64 for properly discharging the combustion gas. The exhaust device 64 is configured such that an exhaust pipe 65 is provided between the suction device 34 and a part of the exhaust discharged from the suction device 34 is used by the exhaust device 64.

  As shown in FIG. 10, the take-out unit 4 includes a water cooling tank 26 provided at the lower portion of the discharge path 11 and a conveyor 27 provided inside the water cooling tank 26. The water cooling tank 26 is formed of a barrel-shaped body that expands upward, and water is stored inside. Thus, the molten asbestos eluted from the melting furnace 2 is cooled in the water-cooled tank 26, so that it immediately solidifies and changes to a stone-like material. Therefore, the processing efficiency is high and the handling of the waste asbestos material becomes easy.

  The conveyor 27 is provided obliquely on one side of the water-cooled tank 26 and transports the water-cooled and solidified stone-like material to an unloading container 66 placed on the side of the water-cooled tank 26. Providing such a conveyor 27 is preferable in that a stone-like material that has been water-cooled but has residual heat can be carried out safely and efficiently.

  The above description is an example of the embodiment of the present invention. Therefore, the technical scope of the present invention is not limited to this, and various modifications are included in addition to the above-described embodiment.

It is a front view which illustrates one embodiment of the present invention. It is an enlarged view of the upper part. FIG. It is an enlarged front view of a supply means. It is the side view. FIG. It is a principal part expansion perspective view of a filtration means. It is sectional drawing of a fixed quantity supply means. FIG. It is an enlarged front view of a melting furnace and an extraction part. It is a longitudinal cross-sectional view of a melting furnace. FIG. It is a flowchart explaining the flow from a suction inlet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Detoxification apparatus of waste asbestos material 2 Melting furnace 3 Supply means 4 Extraction part 5 Fixed supply means 6 Furnace wall material 7 Melting space 8 Asbestos inflow path 9 Burner 10 Combustion gas blowing hole 11 Discharge path 12 Receiving hole 13 Upper stationary board 14 Feed hole 15 Lower stationary plate 16 Receiving hole 17 Transport plate 18 Drive means 19 Passing hole 20 Heat insulation plate 21 Suction means 22 Multi-cyclone 23 Crusher 24 Filtration means 25 Auxiliary pipe 26 Water cooling tank 27 Conveyor

Claims (6)

Supply means for supplying the waste asbestos material to the melting furnace, a melting furnace for melting the supplied waste asbestos material at a high temperature to form molten asbestos, and taking out the solidified stone material by cooling the molten asbestos discharged from the melting furnace With a take-out part,
The supply means has a constant supply means for controlling the waste asbestos material whose amount to be charged is increased and decreased to a constant amount and supplying heat to the melting furnace while suppressing heat leakage from the melting furnace ,
The quantitative supply means includes an upper stationary plate having a receiving hole for receiving the waste asbestos material, a lower stationary plate having a feed hole that is arranged to be displaced from the receiving hole and feeds the waste asbestos material toward the melting furnace, A conveying board that is rotatably inserted between the upper stationary board and the lower stationary board and has a receiving hole that coincides with the receiving hole and the feeding hole at different rotational positions by the rotation, and a driving means for rotating the conveying board. And
The transport board transports the waste asbestos material supplied from the receiving hole to the receiving hole to the feeding hole side by rotation driven by the driving means, and directs it to the melting furnace through the feeding hole corresponding to the receiving hole. It is sent Te detoxification apparatus waste asbestos material, wherein.   The melting furnace has a lower-cone-shaped frustoconical melting space surrounded by a furnace wall made of a plurality of layers of refractory material, and waste asbestos material that opens at the upper surface of the melting space and is supplied by the supply means flows in. An asbestos inflow passage, a plurality of combustion gas blowout holes having a burner that opens at a peripheral surface of the melting space, blows combustion gas tangentially to the peripheral surface and swirls spirally in the melting space, and a bottom of the melting space The waste asbestos material detoxifying device according to claim 1, wherein the waste asbestos material is opened with a discharge path for introducing molten asbestos to the extraction portion. Said dispensing means includes a passage holes aligned with housing hole vertically, claim 1 is driven in the driving means and having a heat insulating plate which rotates together with the conveying plate along the lower surface of the lower stationary plate Or the detoxification apparatus of waste asbestos material of 2 . The supply means includes a suction means for sucking and transferring the waste asbestos material, a multicyclone for separating the waste asbestos material being transferred by the suction means, and a pulverizer for finely pulverizing the waste asbestos material separated by the multicyclone The detoxifying device for waste asbestos material according to any one of claims 1 to 3 , further comprising: The supply means further has a filtering means for separating waste asbestos material dust remaining in the suction air after the waste asbestos material is separated by a multi-cyclone,
The harmless waste asbestos material according to any one of claims 1 to 4 , wherein the filtering means is connected to a melting furnace through an auxiliary pipe that directly sends the collected waste asbestos dust. Device. The said taking-out part consists of a water cooling tank which receives and cools molten asbestos eluted from a melting furnace, and a conveyor which carries out the stone-like material cooled and solidified in this water cooling tank . The detoxifying device for waste asbestos according to any one of 5 .

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