JP5190418B2 - Waste asbestos detoxification equipment - Google Patents

Description

  The present invention relates to a waste asbestos detoxification device.

  Waste asbestos, which is a kind of specially controlled industrial waste, is a hazardous solid waste that is pointed out to be carcinogenic and the like.

  For example, waste asbestos can be made harmless by melting a mixed material that is made by crushing waste asbestos and mixing a flux that lowers the melting temperature into an amorphous (glass) solid. There is an on-site type waste asbestos detoxification device that can be used in a work room defined in a tow container vehicle that can move and crush and melt these waste asbestos (for example, Patent Document 1).

  Such an on-site waste asbestos detoxification device is carried by a trailer head to be pulled into a business premises where asbestos-containing heat insulating materials (waste asbestos) are scattered. The waste asbestos that has been packed in the demolition work site can be put into the work chamber and crushed and melted to be detoxified, and the demolition and detoxification process is completed within the above premises. Therefore, it is attracting attention as a useful thing.

JP 2009-000604 A

  By the way, in the waste asbestos detoxification device as described above, a crushing means for crushing the waste asbestos, a drying means for drying the crushed waste asbestos, and a mixed material obtained by mixing a flux with the dried waste asbestos. In order to collect the dust generated in the melting means to be melted, the internal atmosphere of the crushing means, the drying means and the melting means is sucked, and the sucked internal atmosphere is passed through a filter member such as a bag filter, so that the filter member It is common to provide exhaust means for adhering dust on the surface and exhausting clean air that has passed through the filter member.

  By the way, there is a possibility that clogging occurs due to the dust particles adhering to such a filter member, and it becomes difficult to satisfactorily suck the internal atmosphere of the crushing means and the like. Moreover, although dust collection is possible by attaching dust to a filter member, it is calculated | required that the attached dust should be made harmless reliably.

  In view of the above circumstances, the present invention is capable of collecting dust generated by the detoxification treatment of waste asbestos well, and making the collected dust dust harmless. An object is to provide an apparatus.

In order to achieve the above object, a waste asbestos detoxification apparatus according to claim 1 of the present invention comprises a crushing means for crushing waste waste asbestos and a drying means for drying waste asbestos crushed by the crushing means. an induction heating furnace for melting by induction heating the mixing material including a flux to lower the melting temperature of the waste asbestos drying by the drying unit, said crushing means, each of said drying means and said induction heating furnace While collecting the dust by sucking the internal atmosphere and passing it through the filter member, the internal atmosphere of the induction heating furnace is sucked through the exhaust means for discharging clean air and the exhaust pipe through the exhaust pipe. a waste asbestos detoxification device which includes a suction means for adjusting the pressure, the exhaust means, any that are alternatively selected for each predetermined time Fi It comprises a removing mechanism for removing dust was adhered to the filter member by jetting compressed air to the motor member, and a delivery mechanism for delivering a portion of the dust was removed by the removing mechanism to said crushing means The exhaust pipe is provided with a plurality of air introduction pipes that are connected to the air introduction port and are provided with adjustment valves that allow or restrict the passage of air introduced from the air introduction port. And a furnace pressure detecting means for detecting the pressure inside the induction heating furnace, and in the normal state, the adjustment valve is opened, while the pressure value detected by the furnace pressure detecting means is set to a predetermined upper limit value. And control means for closing at least one of the opened regulating valves .

  According to the present invention, the removal mechanism removes dust adhering to the filter member by injecting the compressed air to an arbitrary filter member selected alternatively at a predetermined time, and the delivery mechanism Since a part of the dust removed by the removal mechanism is sent to the crushing means, the dust generated by the detoxification treatment of the waste asbestos can be collected well without causing clogging or the like in the filter member. It is possible to produce an effect that the collected dust can be made harmless without fail.

FIG. 1 is a schematic diagram schematically showing the structure of a waste asbestos detoxification apparatus according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing the dryer shown in FIG. FIG. 3 is an explanatory diagram showing a case where the main part of the dryer shown in FIG. 2 is viewed from above. FIG. 4 is a partial vertical cross-sectional view showing an enlarged main part of the dryer shown in FIG. FIG. 5 schematically shows the internal structure of the induction heating furnace shown in FIG. 1, and a part thereof is shown in cross section. FIG. 6 is an explanatory view schematically showing a discharge operation of the induction heating furnace shown in FIG. FIG. 7 is an explanatory view schematically showing a configuration around the saucer shown in FIG. 1. FIG. 8 is an explanatory view schematically showing a main part of the exhaust unit shown in FIG. FIG. 9 is an explanatory view schematically showing how to remove dust attached to the bag filter shown in FIG. FIG. 10 is a block diagram showing a characteristic control system of the waste asbestos detoxification apparatus according to the embodiment of the present invention. FIG. 11 is a flowchart showing the contents of the furnace pressure control process performed by the furnace pressure control unit.

  Exemplary embodiments of a waste asbestos detoxification apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram schematically showing the structure of a waste asbestos detoxification apparatus according to an embodiment of the present invention. The waste asbestos detoxification device illustrated here is an on-site type device disposed in a work room defined in a towable container vehicle 1 towed by a trailer head (not shown). The work chamber is divided into a front chamber 2, a middle chamber 3, and a rear chamber 4. Although not clearly shown in FIG. 1, the anterior chamber 2 is provided with a control device for various types of waste asbestos detoxification devices, various monitors, a distribution board, and the like. It has a role as a control room that controls driving of various components.

  The waste asbestos detoxification device includes an input mechanism 10, a crusher (crushing means) 20, a dryer (drying means) 30, a mixer 40, an induction heating furnace (melting means) 50, an exhaust heat recovery mechanism 60, and an exhaust unit ( (Exhaust means) 70 is provided.

  The input mechanism 10 is disposed in the rear chamber 4 and exposes asbestos-containing heat insulating material (waste asbestos) packed in a cylindrical lidded sealed container 5a or waste asbestos packed in a bag 5b to the outside air. It is for throwing it into the inside of the apparatus without being damaged. Although a description of a specific configuration of the input mechanism 10 is omitted, the waste asbestos input to the input mechanism 10 is conveyed to the crusher 20 communicated by a predetermined conveying mechanism or the like.

  The crusher 20 is disposed in the middle chamber 3, crushes the waste asbestos that has been input to the input mechanism 10 and transferred by the transfer mechanism or the like. For example, a biaxial crushing roller cutter 22 is provided inside. In such a crusher 20, in the crusher body 21, for example, waste asbestos falls from above, and when the crushing roller cutter 22 is driven, the falling asbestos is crushed and roughly crushed, and provided below. It is sent to the dryer 30 by the sending feeder 23.

  FIG. 2 is a longitudinal sectional view showing the dryer 30 shown in FIG. As shown in FIG. 1, the dryer 30 is disposed in the middle chamber 3, and a spiral feeder 32 and a sheath heater 33 are provided inside a dryer body 31 partitioned from the periphery.

  As shown in FIG. 2, the spiral feeder 32 is formed of a metal material such as stainless steel, for example, and spirals around the rod-shaped shaft-like portion 34 extending in the vertical direction along the vertical direction. The conveyance path which comprises the conveyance path 32a which extends to the upper side, and conveys the waste asbestos thrown in from the lower insertion port 35 by giving a vibration to itself by the mechanism not shown toward the upper conveyance outlet 36 It is a member. The lower surface 32b of the spiral feeder 32 is coated with a black body paint that absorbs far infrared rays.

  As shown in FIG. 2, the sheath heater 33 extends in a manner that it is sandwiched up and down by a conveyance path 32 a configured by a spiral feeder 32. More specifically, as shown in FIG. 3, the sheath heater 33 is curved such that the tip 33a forms an arc shape. Such a sheath heater 33 is a heater that irradiates far-infrared rays when it is energized.

  Heating by the sheath heater 33 is performed as follows. As shown in FIG. 4, far infrared rays are emitted from the sheath heater 33 in the vertical and horizontal directions. Here, since the black body paint that absorbs far-infrared rays is applied to the lower surface 32 b of the spiral feeder 32, the waste asbestos immediately above the sheath heater 33 is heated through the spiral feeder 32. Further, the waste asbestos is directly heated by far infrared rays irradiated from the sheath heater 33 immediately below the sheath heater 33.

  The mixer 40 communicates with the dryer 30 through the carry-out port 36, and is provided with a hopper 41 in which a flux is accommodated. Here, the flux is for lowering the melting temperature of waste asbestos and is, for example, carbonate or borate of alkali metal or alkaline earth metal. In such a mixer 40, the waste asbestos that has been subjected to the drying process carried out through the carry-out port 36 is mixed with the flux supplied from the hopper 41 to form a mixed material. The formed mixture is supplied to the induction heating furnace 50 by a supply feeder 42 provided below the mixer 40.

  FIG. 5 schematically shows the internal structure of the induction heating furnace 50 shown in FIG. 1, and a part thereof is shown in cross section. The induction heating furnace 50 illustrated here is formed by arranging a furnace lid body 50b on a bottomed cylindrical furnace body 50a having an open upper surface so as to close the upper surface opening of the furnace body 50a. A crucible 51 is disposed inside the furnace main body 50a, and a protruding portion 52 that protrudes outward is provided on a part of the side peripheral surface of the induction heating furnace 50 (furnace main body 50a). The projecting portion 52 is provided with a through-hole 521, and a rod-shaped shaft portion 522 passes through the through-hole 521, whereby the induction heating furnace 50 is rotated around the shaft center of the shaft portion 522. It can be tilted.

  The crucible 51 is made of metal such as stainless steel or Inconel material (trade name), and has a bottomed cylindrical shape having an opening 51a at the upper end. The crucible 51 is disposed in the central region of the furnace body 50a (induction heating furnace 50), the inner surface of the side portion constitutes a part of the inner peripheral surface of the induction heating furnace 50, and the bottom portion is the induction heating furnace. 50 inner bottom portions are formed. Although not shown in the figure, the outer peripheral surface of the crucible 51 is covered with a heat insulating material and filled with a refractory material. In addition, a cylindrical induction heating coil is supported by the yoke in such a manner that the crucible 51 is wound at a position separated from the outer peripheral surface of the crucible 51 by a predetermined distance. The induction heating coil is connected to one power source to form an electric circuit. This power supply supplies an alternating current of several tens Hz to several kHz.

  The furnace lid body 50 b is provided with a hot water outlet 53, a through hole 541 through which a supply cylinder 54 communicates with the tip of the supply feeder 42, and an agitator 55 that agitates the mixed material put into the crucible 51. is there. The hot water outlet 53 is an opening for discharging the melted material melted inside the crucible 51 to the outside. The agitator 55 includes a drive motor 55a and an agitation rod 55b that agitates the mixed material in the crucible 51 by rotating around its own axis by driving the drive motor 55a. Here, the shape of the stirring rod 55b is not particularly limited, but by rotating around its own axis, the mixed material can be pushed down and pushed out toward the periphery of the crucible 51 by centrifugal force. Such a shape is desirable.

  In the side part of the crucible 51, the upper surface opening 51a is formed, and in order to avoid the overflow of the mixed material from the upper part of the crucible 51, an upper extension part 51b extending upward from the molten metal surface is provided. doing. The upper extension 51b of the crucible 51 does not contribute to the melting of the mixed material, but is heated by induction. Therefore, the upper extension 51b has slits 51c formed at predetermined intervals along the circumferential direction. The eddy current does not easily flow through the extended portion 51b, and induction heating at the upper extended portion 51b is suppressed. Here, the upper surface opening 51a formed by the upper extension 51b is located above the lower surface of the supply cylinder 54 that penetrates the through hole 541 of the furnace lid 50b, and the lower end of the slit 51c is the supply cylinder. It is adjusted to be positioned below the lower surface of 54. In addition, an insulating refractory 51d is embedded in the slit 51c.

  In such an induction heating furnace 50, after a mixed material (waste asbestos + flux) is supplied from the supply feeder 42 via the supply cylinder 54, an alternating current is passed through the induction heating coil to bring it into an energized state, thereby alternating magnetic flux. Apply. Thereby, an eddy current is generated in the crucible 51, the crucible 51 is heated by Joule heat due to eddy current loss, the mixed material supplied to the inside is heated by heat transfer from the crucible 51, and stirred by the stirrer 55. As shown in (a) of FIG. 6, it will be melted. At this time, since the slits 51c are formed along the circumferential direction in the upper extension portion 51b of the side portion of the crucible 51, the eddy current hardly flows and the upper extension portion 51b is hardly heated.

  After the mixed material is melted, the supply feeder 42 is moved in the horizontal direction and retracted from the upper region of the furnace cover body 50b, so that the induction heating furnace 50 is connected to the shaft of the shaft portion 522 as shown in FIG. The melt in the crucible 51 is tilted about the center and discharged from the hot water outlet 53 to the tray 56.

  As shown in FIG. 7, the melt discharged to the receiving tray 56 is put into a recovery container 58 that is transported by the transport roller 57 in the lower area of the receiving tray 56, and the exhaust heat recovery mechanism 60 is being transported by the transport roller 57. As a result, exhaust heat is recovered.

  The exhaust heat recovery mechanism 60 includes an exhaust heat recovery unit 61 and an exhaust heat recovery pipe 62. The exhaust heat recovery unit 61 is disposed in the vicinity of the receiving tray 56 and is used for recovering the exhaust heat of the melt from the recovery container 58 that is charged with the melt by the receiving tray 56 and transported by the transport roller 57. It is an opening. The exhaust heat recovery unit 61 is connected to one end of the exhaust heat recovery pipe 62. The other end of the exhaust heat recovery pipe 62 is connected to the exhaust heat introduction port 37 of the dryer 30, whereby the exhaust heat recovery unit 61 passes through the exhaust heat recovery pipe 62 to the inside of the dryer main body 31 of the dryer 30. Communicating with

  An exhaust heat recovery blower 63 is disposed in the exhaust heat recovery pipe 62, and the exhaust heat of the melt in the recovery container 58 is exhausted through the exhaust heat recovery unit 61 when the exhaust heat recovery blower 63 is driven. (For example, 500 ° C.) is sucked and passed through the exhaust heat recovery pipe 62 and then introduced into the dryer main body 31 through the exhaust heat introduction port 37.

  Thus, the exhaust heat recovery mechanism 60 recovers the heat of the melt melted and discharged by the induction heating furnace 50, introduces the recovered heat, and heats the waste asbestos conveyed by the spiral feeder 32. Is configured.

  The exhaust unit 70 includes an exhaust main body 71 and an air introduction pipe 72. The exhaust main body 71 is disposed in the rear chamber 4 and communicates with each component of the waste asbestos detoxifying device in the middle chamber 3, for example, the crusher 20, the dryer 30, and the induction heating furnace 50 through the exhaust pipe 73. doing.

  As shown in FIG. 8, a discharge blower 74, a removal mechanism 75, and a delivery mechanism 76 are disposed inside the exhaust body 71. When this discharge blower 74 is driven, air is sucked through the exhaust pipe 73, passes through a bag filter (filter member) 77, attaches dust to the surface of the bag filter 77, and passes through the bag filter 77. Clean air is discharged to the outside. In the present embodiment, the discharge blower 74 is always driven, and constitutes a suction means for sucking the atmosphere inside the induction heating furnace 50 through the exhaust pipe 73 and adjusting the inside of the induction heating furnace 50 to a negative pressure. doing.

  The removal mechanism 75 injects compressed air to an arbitrary bag filter 77 that is alternatively selected at predetermined time intervals in a direction opposite to the direction in which the air that has passed through the exhaust pipe 73 is sucked. The dust adhering to the surface of the bag filter 77 is removed.

  The delivery mechanism 76 has a bypass pipe 761 extending from the inside of the exhaust body 71 to the inside of the crusher body 21, and is removed by the removal mechanism 75 by opening the bypass valve 762 disposed in the bypass pipe 761. The discharged dust is sent into the crusher main body 21.

  A plurality (three in the illustrated example) of the air introduction pipes 72 are provided, each of which communicates with an air introduction port (not shown) provided individually, and the passage of air introduced from the air introduction port. An adjustment valve 721 that allows or restricts the above is provided. These atmospheric introduction pipes 72 are connected to the exhaust pipe 73 so as to join from the middle. The adjustment valve 721 is a valve body that is opened and closed by air, for example, and is normally opened.

  In such an exhaust unit 70, since the exhaust blower 74 is always driven, the internal atmosphere of the constituent elements such as the crusher 20 is sucked through the exhaust pipe 73 and sucked as shown in FIG. By passing the internal atmosphere through the bag filter 77, the passed clean air can be discharged to the outside, and dust can be collected by adhering to the surface of the bag filter 77.

  Then, as shown in FIG. 9B, the direction opposite to the direction in which compressed air is sucked into an arbitrary bag filter 77 that is alternatively selected every predetermined time and air that has passed through the exhaust pipe 73 is sucked. It is possible to remove dust that is sprayed in the direction and adheres to the surface of the bag filter 77. The removed dust is sent to the crusher main body 21 through the bypass pipe 761 when the delivery mechanism 76 opens the bypass valve 762.

  FIG. 10 is a block diagram showing a characteristic control system of the waste asbestos detoxification apparatus according to the embodiment of the present invention. As shown in FIG. 10, the waste asbestos detoxification device includes a furnace pressure detection sensor (furnace pressure detection means) S and a furnace pressure control unit 80.

As shown in FIG. 5, the furnace pressure measurement port P is disposed at an arbitrary location inside the induction heating furnace 50, and the furnace pressure disposed near the furnace pressure measurement port P and the induction heating furnace 50. The detection sensor S is connected via a pipe or the like. The furnace pressure detection sensor S detects the pressure (furnace pressure) of the induction heating furnace 50 transmitted from the furnace pressure measurement port P. The pressure detected by the furnace pressure detection sensor S is sent to the furnace pressure control unit 80 as a detection signal.

  The furnace pressure control unit 80 operates according to programs and data stored in the memory 84 in advance, and includes an input processing unit 81, a comparison unit 82, and an adjustment valve drive processing unit 83. In the present embodiment, the furnace pressure control unit 80 is described as an independent control mechanism. However, in the present invention, the furnace pressure control unit 80 controls the operation of the waste asbestos detoxification device in an integrated manner. You may incorporate in the main controller to control.

  The input processing unit 81 performs input processing of a detection signal given from the furnace pressure detection sensor S. The comparison unit 82 reads the setting information stored in advance in the memory 84, and whether or not the pressure value of the furnace pressure input through the input processing unit 81 exceeds a set upper limit value included in the setting information, or It is compared whether it is below the setting lower limit value included in the setting information. Here, the setting information is determined in order to maintain the pressure of the induction heating furnace 50 in a preferable negative pressure state, and the set upper limit value is, for example, −100 Pa, and the set lower limit value is, for example, −500 Pa. .

  The adjustment valve drive processing unit 83 performs drive processing for opening and closing each adjustment valve 721 (first adjustment valve 721a, second adjustment valve 721b, and third adjustment valve 721c) disposed in the air introduction pipe 72. . Here, the adjustment valve drive processing unit 83 opens each of the adjustment valves 721 in the initial normal state. As described above, since each adjusting valve 721 is opened and the discharge blower 74 is always driven as described above, the air introduced from the atmosphere introduction port is connected to the atmosphere introduction pipe 72 and the exhaust pipe 73. It passes through and is sucked into the exhaust body 71, passes through the bag filter 77, and is discharged to the outside.

  FIG. 11 is a flowchart showing the contents of the furnace pressure control process performed by the furnace pressure control unit 80. The operation performed by the waste asbestos detoxification device will be described by explaining the furnace pressure control process.

  In the in-furnace pressure control processing, when the furnace pressure control unit 80 receives a detection signal from the furnace pressure detection sensor S through the input processing unit 81 (step S101: Yes), the setting information is read from the memory 84 through the comparison unit 82 and input. It is compared whether or not the detected pressure exceeds the set upper limit value (−100 Pa) included in the setting information (step S102).

  When the detected pressure exceeds the set upper limit value (step S102: Yes), the furnace pressure control unit 80 causes one of the adjustment valves 721 to be closed through the adjustment valve drive processing unit 83 (step S103), and thereafter Return the procedure to end the current process. Here, the processing in step S103 will be described in detail. When any of the adjusting valves 721 is open, the furnace pressure control unit 80 closes the first adjusting valve 721a, and only the first adjusting valve 721a is operated. When the first adjustment valve 721b is closed, the second adjustment valve 721b is closed, and when the first adjustment valve 721a and the second adjustment valve 721b are closed, the third adjustment valve 721c is closed.

  According to this, the force for sucking the internal atmosphere of the induction heating furnace 50 through the exhaust pipe 73 becomes relatively large, and thereby the furnace pressure changes to a preferable negative pressure state (for example, −100 Pa or less).

  When the detected pressure is not more than the set upper limit value and not less than the set lower limit value (step S102: No, step S104: No), that is, the furnace pressure of the induction heating furnace 50 is in a preferable negative pressure state. The unit 80 maintains the open / close state of the adjustment valve 721, and then returns the procedure to end the current process.

  On the other hand, when the detected pressure is less than the set lower limit value (step S102: No, step S104: Yes), the furnace pressure control unit 80 determines whether there is an adjustment valve 721 that has already been closed through the adjustment valve drive processing unit 83. Is determined (step S105). If there is no adjustment valve 721 that has already been closed (step S105: No), the furnace pressure control unit 80 returns the procedure and ends the current process without performing the process described later.

  When there is an adjustment valve 721 that has already been closed (step S105: Yes), the furnace pressure control unit 80 opens the adjustment valve 721 that has been closed through the adjustment valve drive processing unit 83 (step S106). To end the current process. Here, the processing in step S106 will be described in detail. When only the first adjustment valve 721a has already been closed, the furnace pressure control unit 80 opens the first adjustment valve 721a to perform the first adjustment. If the valve 721a and the second adjustment valve 721b have already been closed, the second adjustment valve 721b is opened, and if all the adjustment valves 721 have already been closed, the third adjustment valve 721c Is opened.

  According to this, the force for sucking the internal atmosphere of the induction heating furnace 50 through the exhaust pipe 73 becomes relatively small, whereby the furnace pressure changes to a preferable negative pressure state (for example, −500 Pa or more).

  As described above, according to the waste asbestos detoxification device according to the embodiment of the present invention, the dryer 30 conveys the waste asbestos crushed by the crusher 20 with the spiral feeder 32 wound spirally. Since the waste asbestos being transported is dried by heating with the sheath heater 33, the transport distance of the waste asbestos, that is, the drying time can be sufficiently secured, and the waste asbestos can be removed without increasing the size of the dryer 30 itself. It can be dried well. Therefore, there is no fear of increasing the size of the entire apparatus, and the crushed waste asbestos can be satisfactorily dried.

  In particular, the exhaust heat recovery mechanism 60 recovers the heat of the melt melted and discharged by the induction heating furnace 50, introduces the recovered heat, and heats the waste asbestos conveyed by the spiral feeder 32. Asbestos can be effectively utilized to dry waste asbestos, the power consumption of the sheath heater 33 can be reduced, and as a result, the cost can be reduced.

  According to the waste asbestos detoxification apparatus, the crucible 51 of the induction heating furnace 50 forms the upper surface opening 51a and has the upper extension 51b extending upward, so that it is put into the crucible 51. When the waste asbestos is melted by induction heating, it can be avoided that the waste asbestos leaks to the outside, and the slits 51c are formed at predetermined intervals along the circumferential direction in the upper extension 51b. The eddy current is less likely to flow, and it is possible to reduce the power consumption required for melting by suppressing the upper extension 51b from being heated more than necessary.

  Moreover, according to the waste asbestos detoxification device, the exhaust blower 74 is always driven in the exhaust unit 70, so that the internal atmosphere of the components such as the crusher 20 is sucked through the exhaust pipe 73 and the sucked internal By passing the atmosphere through the bag filter 77, the passed clean air can be discharged to the outside, and dust can be collected by adhering to the surface of the bag filter 77. Moreover, the removing mechanism 75 jets compressed air to an arbitrary bag filter 77 that is alternatively selected every predetermined time to remove dust adhering to the surface of the bag filter 77, and the sending mechanism 76. The dust is removed from the crusher body 21. Therefore, the dust generated by the detoxification treatment of waste asbestos can be collected well, and the collected dust can be reliably rendered harmless.

  Further, according to the waste asbestos detoxification device, the furnace pressure control unit 80 normally opens the adjustment valve 721, while the pressure detected by the furnace pressure detection sensor S has a predetermined set upper limit value. In the case of exceeding, at least one of the opened adjustment valves 721 is closed, so that the force for sucking the internal atmosphere of the induction heating furnace 50 through the exhaust pipe 73 can be relatively increased. The inside of the induction heating furnace 50 can be favorably held at a negative pressure.

  As described above, the waste asbestos detoxification apparatus according to the present invention is particularly useful for the detoxification treatment of on-site waste asbestos.

DESCRIPTION OF SYMBOLS 1 Pulling type container vehicle 2 Front chamber 3 Middle chamber 4 Rear chamber 10 Loading mechanism 20 Crusher 21 Crusher main body 22 Crushing roller cutter 23 Delivery feeder 30 Dryer 31 Dryer main body 32 Spiral feeder 32a Conveyance path 33 Sheath heater 33a Tip part 34 Shaft-shaped part 35 Input port 36 Unloading port 37 Waste heat introduction port 40 Mixer 41 Hopper 42 Feeding feeder 50 Induction heating furnace 50a Furnace body 50b Furnace lid body 51 Crucible 51a Upper surface opening 51b Upper extension part 51c Slit 51d Refractory 52 Projection part 53 Hot water outlet 54 Supply cylinder 55 Stirrer 55a Drive motor 55b Stirring rod 56 Receptacle 57 Transport roller 58 Recovery container 60 Waste heat recovery mechanism 61 Waste heat recovery part 62 Waste heat recovery pipe 63 Waste heat recovery blower 70 Exhaust unit 71 Exhaust body 72 Atmospheric piping 721 Adjustment valve 73 Exhaust pipe 74 Discharge blower 75 Removal mechanism 76 Delivery mechanism 761 Bypass piping 762 Bypass valve 77 Bag filter 80 Furnace pressure control part 81 Input processing part 82 Comparison part 83 Adjustment valve drive processing part 84 Memory S Furnace pressure detection sensor P Furnace pressure measurement mouth

Claims (1)

Crushing means for crushing the input waste asbestos,
Drying means for drying waste asbestos crushed by the crushing means;
An induction heating furnace for melting by induction heating the mixing material including a flux to lower the melting temperature of the waste asbestos drying by the drying means,
An exhaust means for discharging clean air while collecting dust by sucking the internal atmosphere of each of the crushing means, the drying means and the induction heating furnace and passing through a filter member ;
A waste asbestos detoxification device comprising suction means for sucking the atmosphere inside the induction heating furnace through an exhaust pipe and adjusting the inside of the induction heating furnace to a negative pressure ;
The exhaust means ejects compressed air to an arbitrary filter member selected alternatively at predetermined time intervals to remove dust adhering to the filter member, and the removal mechanism removes the exhaust means. A delivery mechanism for delivering a part of the dust that has been discharged to the crushing means ,
The exhaust pipe is connected to a plurality of air introduction pipes that are connected to the air introduction port and are provided with adjustment valves that allow or restrict the passage of air introduced from the air introduction port. ,
Furnace pressure detection means for detecting the pressure inside the induction heating furnace;
In the normal state, each of the adjustment valves is opened. On the other hand, when the pressure value detected by the furnace pressure detection means exceeds a preset upper limit value, at least one of the opened adjustment valves is closed. Control means
Waste asbestos detoxification apparatus characterized by comprising a.

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