JP2019109010A - Rotary kiln for material treatment - Google Patents

Abstract

To provide a rotary kiln, when a resin-containing material is fed from a feed port of a material feed pipe into a kiln cylindrical body, the kiln cylindrical body is rotated while being heated, and a resin in the material fed into the kiln cylindrical body is vaporized so as to be exhausted, preventing the sticking of the resin in the material at the inside of the material feed pipe and at the inside of the kiln cylindrical body in a state where the resin in the material lies in a fused adhesive body.SOLUTION: Provided is a rotary kiln for material treatment comprising: cooling means 15 where, when a material W containing a resin is fed into a kiln cylindrical body 20 rotated while being heated through the inside of a material feed pipe 12, the material is carried to a position of a temperature at which the resin in the material is vaporized in the kiln cylindrical body through the material feed pipe, the material is fed from a feed port 12a of the material feed pipe into the kiln cylindrical body, and further, the inside of the material feed pipe is prevented to be heated to a temperature at which the resin contained in the material is melted; and heat insulation means 16 where outer circumferential parts of the material feed pipe and a cooling member are heat-insulated.SELECTED DRAWING: Figure 2

Description

  In the present invention, for example, a material in which a resin such as a metal, a metal compound, a carbon material or the like is contained in a plastic is supplied into a cylindrical kiln cylinder rotatably supported through a material supply pipe, The body is rotated while being heated, and the material supplied into the kiln cylinder is transported while being heated, and the resin in the material is vaporized and exhausted from the exhaust portion to be removed, the metal, the metal, and the like. The present invention relates to a material processing rotary kiln adapted to separate and take out compounds, carbon materials and the like. In particular, in the material processing rotary kiln as described above, the material containing the resin as described above is supplied into the kiln cylinder through the material supply pipe, and the kiln cylinder is rotated while being heated to The material is heated while being transported in a kiln cylinder, and the resin in the material is vaporized and discharged from the exhaust part, the resin in the material is not quickly vaporized, and the resin in the material is melted. It adheres to the material supply pipe and the kiln cylinder in the state of the body, prevents the material from accumulating and clogging in the material supply pipe and the kiln cylinder, and kilns the material through the material supply pipe. It is characterized in that it was properly supplied into the cylinder and the resin in the above-mentioned material was quickly vaporized and exhausted so that the above-mentioned material could be properly treated. Those having.

  Conventionally, rotary kilns are used in various applications. For example, as shown in Patent Document 1, it is used to perform roasting and drying in metallurgy and ceramics, as shown in Patent Document 2, and the like. It is used to dry raw materials having a high water content or to process organic wastes and take them out as carbides, activators or ashs as disclosed in Patent Document 3.

  Here, in such a rotary kiln, generally, the material to be processed through the material supply tube is supplied into the rotatably supported cylindrical kiln cylinder, and the kiln cylinder is rotated and the heating means is used. The material supplied into the kiln cylinder is heated, and the material supplied into the kiln cylinder is conveyed while being heated and processed, and the treated material is cooled and led out from the outlet.

  Also, conventionally, a material containing a resin in a metal, a metal compound, a carbon material, etc. is heated to remove the resin contained in the material, and the metal, metal compound, carbon material from which the resin has been removed To obtain such materials, various heat treatment furnaces have been used to perform such treatment.

  Then, the material in which the resin is contained in the metal, the metal compound, the carbon material, etc. in this way is heated, and the resin contained in the above material is removed to remove the resin, metal, metal compound, carbon material, etc. It is conceivable to use a rotary kiln as described above to obtain the material of

JP-A-55-165476 Utility model registration No. 3031902 JP 2004-34003 A

  Here, using a rotary kiln as described above, a material containing a resin in a metal, a metal compound, a carbon material or the like is supplied into a cylindrical kiln cylinder rotatably supported through a material supply pipe, When the kiln cylinder is rotated while being heated, and the material supplied in the kiln cylinder is conveyed while being heated, and the resin in the material is vaporized and exhausted from the exhaust part, The resin is gradually heated and melted in the kiln cylinder, and the melted resin having adhesiveness is adhered and gradually accumulated in the kiln cylinder, and the kiln cylinder is rotated as described above to obtain the above-mentioned materials. Is difficult to transport while heating in the kiln cylinder, and there is a problem that the resin in the above-mentioned material can not be vaporized and removed appropriately. It was.

  In addition, when the material containing the resin is supplied into the cylindrical kiln cylinder through the material supply pipe as described above, the material is contained in the material through the material supply pipe. The material is transported to a position where the temperature of the resin is vaporized, the material is supplied from the supply port of the material supply pipe into the kiln cylinder, and the resin contained in the material supplied in the kiln cylinder is made sticky. It has been considered to shorten the time of holding in the molten state as much as possible and to evaporate the resin quickly in the kiln cylinder.

  However, when the material containing the resin is guided through the material supply pipe to a position where the temperature of the kiln cylinder reaches a temperature at which the resin contained in the material is vaporized, the material containing the resin The resin contained in the above-mentioned material is gradually melted in the material supply pipe in the middle of the material supply pipe which leads to the position of the inside of the kiln cylinder heated as described above, and it is melted and sticky in this way There is a problem that the resin with the metal adheres to the material supply pipe and gradually accumulates, and it becomes impossible to lead the material through the material supply pipe to the position of the kiln cylinder reaching the temperature at which the resin is vaporized. The

  The present invention uses a rotary kiln, and supplies a material containing a resin in a metal, a metal compound, a carbon material, etc. into a cylindrical kiln cylinder rotatably supported through a material supply tube, and the above-mentioned kiln cylinder As described above in the case of rotating while heating the body to transport the material supplied in the kiln cylinder while heating to vaporize the resin contained in the above-mentioned material and exhaust it from the exhaust part for processing. The task is to solve various problems.

  That is, in the present invention, as described above, the material containing the resin is supplied into the kiln cylinder through the material supply pipe, and the kiln cylinder is heated and rotated to convey the material in the kiln cylinder. The resin contained in the above-mentioned material is vaporized while being heated while being discharged and exhausted from the exhaust part for processing, the above-mentioned material supply pipe or kiln cylinder in the state of the adhesive body in which the resin contained in the material is melted The material is prevented from adhering to and accumulating in the body, and the material is appropriately supplied to the kiln cylinder through the material supply pipe, and the resin in the material is quickly vaporized in the kiln cylinder to exhaust from the exhaust portion. It is an object of the present invention to make it possible to appropriately carry out a process of separating and taking out metals, metal compounds, carbon materials and the like from the above-mentioned materials.

  In the rotary kiln for material processing according to the present invention, in order to solve the problems as described above, a material containing a resin is supplied through a material supply pipe into a cylindrical kiln cylinder rotatably supported, The above-described material supplied into the kiln cylinder is conveyed while being heated, and the resin in the material is vaporized and exhausted from the exhaust portion for processing. In the material processing rotary kiln, the material is conveyed through the material supply pipe, and the material is supplied to the material supply pipe by transporting the material in the kiln cylinder to a temperature at which the resin contained in the material is vaporized. The material is supplied from the mouth into the kiln cylinder, and the material supply tube is prevented from being heated to a temperature at which the resin contained in the material is melted. And cooling means that the outer peripheral portion of the material supply pipe and a cooling means is provided and a heat insulating means for thermally insulating.

  Here, as in the rotary kiln for material processing according to the present invention, when the cooling means as described above is provided to prevent the material supply pipe from being heated to a temperature at which the resin contained in the material is melted, the material is A pressure-sensitive adhesive body in which the resin contained in the material is melted on the way of guiding the material through the supply pipe to the position of the temperature at which the resin contained in the material is vaporized. The material is guided through the material supply tube to a position in the kiln cylinder heated to a temperature at which the resin contained in the material is vaporized while the adhesion and accumulation in the material supply tube is prevented. become. And when it is made to supply from a supply port of the material supply pipe to the kiln cylinder at a position in the kiln cylinder heated to a temperature at which the resin contained in the material is vaporized in this way, it is supplied into the kiln cylinder. The resin contained in the above material does not adhere to and accumulate in the kiln cylinder body in the state of the melted adhesive body, and is quickly vaporized and exhausted from the exhaust unit.

  Further, as in the case of the rotary kiln for material processing according to the present invention, when the heat insulating means for heat insulating the outer peripheral portion of the material supply pipe and the cooling means is provided, the resin in the material vaporized in the kiln cylinder as described above It is suppressed that gas (component of vaporized resin) is brought into direct contact with the outer periphery of the material supply pipe or the cooling means to be cooled, and the vaporized resin is solidified in the outer periphery of the material supply pipe or the cooling means The resin is prevented from adhering to the outer peripheral portion of the material supply pipe and the cooling means.

  Here, in the rotary kiln for material processing of the present invention, in conveying the material supplied in the material supply pipe and guiding it into the kiln cylinder, a conveyance screw is provided in the material supply pipe, and the conveyance screw is rotated. The material supplied into the material supply pipe can be transported.

  Further, in the rotary kiln for material processing of the present invention, as the cooling means, a cooling pipe having a refrigerant passage on the outer peripheral side of the material supply pipe is provided along the material supply pipe, and the refrigerant passage in the cooling pipe The refrigerant can be cooled in the above-mentioned material supply pipe. In this way, the material supply pipe can be easily prevented from being heated to a temperature at which the resin contained in the material is melted.

  When the cooling pipe having the refrigerant passage on the outer peripheral side of the material supply pipe is provided along the material supply pipe as the cooling means as described above, the cooling pipe is provided on the outer peripheral side of the cooling pipe as the heat insulation means. A tubular heat insulating member can be provided along the cooling pipe. When the cylindrical heat insulating member is thus provided along the cooling pipe on the outer peripheral side of the cooling pipe, the gas of the resin contained in the material vaporized in the kiln cylinder contacts the outer peripheral portion of the cooling pipe And the resin gas is prevented from being solidified and attached to the outer peripheral portion of the cooling pipe, and the vaporized resin gas is properly exhausted from the exhaust portion. .

  Further, in the rotary kiln for material processing of the present invention, heat in the kiln cylinder passes through the supply port at a position downstream of the material feed direction with respect to the supply port for supplying the material from the material supply pipe into the kiln cylinder. It is preferable to provide a radiation shield which suppresses being introduced into the material supply tube. In this way, the heat in the kiln cylinder heated to the temperature at which the resin contained in the material is vaporized is prevented from being conducted into the material supply pipe through the supply port, and the material can be supplied to the material supply pipe On the way to the supply port, the resin in the material is melted and prevented from adhering to the material supply pipe in the state of the adhesive. Here, when providing such a radiation shield, a metal plate may be used as the radiation shield, and the radiation shield may be held by a support provided from the heat insulating member toward the downstream side in the material feeding direction. it can.

  In the material processing rotary kiln of the present invention, when the gas in which the resin in the material is vaporized is exhausted from the exhaust portion, the exhaust portion is preferably provided on the supply side for supplying the material into the kiln cylinder. . In this case, when the material after the resin is vaporized is transported in the kiln cylinder and taken out from the outlet, the gas of the resin vaporized from the material is co-present with the material after the treatment. It is led to the outlet, and the gas of the vaporized resin is prevented from coming into contact with the material after the treatment to solidify, and the resin does not reattach to the material after the treatment.

  In the rotary kiln for material processing in the present invention, the material containing the resin as described above is led through the material supply pipe to a position where the kiln cylinder is heated to a temperature at which the resin contained in the material is vaporized. Since the material supply pipe is provided with a cooling means for preventing the resin contained in the material from being heated to the melting temperature, the material is contained in the material through the material supply pipe and the kiln cylinder is contained in the material. On the way to a position where the resin is heated to the temperature at which the resin is vaporized, the resin in the material is prevented from adhering and accumulating in the material supply pipe in the state of the melted adhesive, and the material is Through the material supply pipe, the resin contained in the material is appropriately led to the position in the kiln cylinder heated to the temperature at which the material is vaporized. Then, the material is guided to a position in the kiln cylinder heated to a temperature at which the resin contained in the material is vaporized as described above, and is supplied from the supply port of the material supply pipe into the kiln cylinder. The resin inside is quickly vaporized in the kiln cylinder and is exhausted from the exhaust part, and the resin in the material adheres and accumulates in the kiln cylinder in the state of the melted adhesive, and the transportation of the material It will not be difficult, and it will be possible to appropriately separate and take out metals, metal compounds, carbon materials and the like from the above-mentioned materials.

  Further, in the rotary kiln for material processing in the present invention, since the heat insulating means for heat insulating the outer peripheral portion of the material supply pipe and the cooling means is provided as described above, the resin in the material vaporized in the kiln cylinder as described above It is suppressed that the gas is cooled by direct contact with the outer peripheral portion of the material supply pipe or the cooling means, and the vaporized resin is solidified at the outer peripheral portion of the material supply pipe or the cooling means, and the material supply pipe or the cooling means The resin is prevented from adhering to the outer peripheral portion of

In the rotary kiln for material processing according to the embodiment of the present invention, the material containing the resin is supplied into the kiln cylinder through the material supply pipe, and the kiln cylinder is heated and rotated to supply the kiln cylinder. It is shown that the resin contained in the above material is vaporized and transported in the kiln cylinder, and the gas of the vaporized resin is exhausted from the exhaust unit, and the material after the resin is vaporized is drawn out from the outlet unit. FIG. In the rotary kiln for material processing according to the above-described embodiment, the state in which the material is led through the material supply pipe to a position where the material is heated to a temperature at which the resin contained in the material is vaporized is supplied to the kiln cylinder. It is the partially expanded schematic sectional drawing shown. In the rotary kiln for material processing according to the above-described embodiment, the bottom of the kiln cylinder is rotatably supported by the pair of support rollers on both sides, and the material feed direction downstream of the feed port of the material feed pipe. It is the partial expansion schematic explanatory drawing which showed the state which provided the radiation shield in the position.

  Hereinafter, a rotary kiln for material processing according to an embodiment of the present invention will be specifically described based on the attached drawings. In addition, the rotary kiln for material processing which concerns on this invention is not limited to what was shown to the following embodiment, In the range which does not change the summary of invention, it can change suitably and can implement.

  In the material processing rotary kiln according to this embodiment, as shown in FIG. 1 and FIG. 2, the material W containing the resin is supplied from the material guiding portion 11 into the material supply pipe 12. Then, the material supply pipe 12 is inserted into the cylindrical kiln cylinder 20 rotated while being heated, and the material W supplied in the material supply pipe 12 is passed through the material supply pipe 12. The inside of the kiln cylinder 20 is guided to the position of the temperature at which the resin contained in the material W is vaporized, and the material W is fed from the supply port 12a on the downstream side of the material supply pipe 12 in the transport direction It is made to supply to the said heated position in 20. FIG. In this embodiment, when inserting the material supply pipe 12 into the kiln cylinder 20, the material supply pipe 12 is provided at a position lower than the center of the kiln cylinder 20, and the material W is supplied to the material supply pipe. When the material W is supplied from the 12 supply ports 12 a so as to be dropped into the kiln cylinder 20, scattering of the supplied material W in the kiln cylinder 20 is suppressed.

  Here, in this embodiment, the material W containing the resin as described above is vaporized from the resin contained in the material W at the temperature inside the kiln cylindrical body 20 from the supply port 12a of the material supply pipe 12 The resin contained in the material W is vaporized before the resin contained in the material W is melted and adheres to the inside of the kiln cylinder 20 in the state of the adhesive body. . Therefore, the resin contained in the material W supplied into the kiln cylinder 20 from the supply port 12a of the material supply pipe 12 adheres and accumulates in the kiln cylinder 20 in the state of the melted adhesive body. And the material W is properly transported without being clogged in the kiln cylinder 20.

  Then, after transporting the material W while heating the material W in the kiln cylinder 20 so as to vaporize the resin as described above, the material is cooled through the cooling portion C where the kiln cylinder 20 is not heated. It is led to the lead-out part 30, and the material W processed as described above is led out from the lead-out port 31 in the lead-out part 30.

  Further, in the lead-out portion 30, the carrier gas supply port 32 for supplying a carrier gas such as nitrogen gas is provided, and the carrier gas is introduced into the kiln cylinder 20 from the carrier gas supply port 32, as described above. Together with the gas of the resin vaporized in the kiln cylinder 20 and the carrier gas, it is guided through the kiln cylinder 20 to the exhaust unit 40 provided on the material supply side, and the exhaust passage provided in the exhaust unit 40 The exhaust gas containing the gas of the resin and the carrier gas is exhausted through 41.

  Here, in this embodiment, when the material W containing the resin is conveyed through the inside of the material supply pipe 12 as described above and supplied into the kiln cylindrical body 20, the conveyance screw in the material supply pipe 12 is The feed screw 13 is rotated by the motor 14 to feed the material W supplied into the material feed pipe 12 by the feed screw 13 and lead it to the feed port 12a, and a kiln is fed from the feed port 12a. The temperature in the cylinder 20 is supplied to a position at which the resin contained in the material W is vaporized. In this embodiment, when the material W containing the resin is transported through the material supply pipe 12 as described above and supplied into the kiln cylindrical body 20, the transport which rotates in the material supply pipe 12 is performed. An appropriate amount of material W is conveyed by the screw 13 and supplied into the kiln cylinder 20. However, an appropriate amount of material W is conveyed through the material supply pipe 12 and supplied into the kiln cylinder 20. In particular, the transport screw 13 may not be provided. For example, the material supply pipe 12 may be inclined at an appropriate angle so that the material W slides down.

  Further, as described above, the material W containing the resin is transported through the inside of the material supply pipe 12 to the position where the temperature in the kiln cylinder 20 is a temperature at which the resin contained in the material W is vaporized. The material supply pipe 12 is heated to a temperature at which the resin contained in the material W is melted, so that the molten adhesive resin is prevented from adhering to the material supply pipe 12. A cooling means 15 for cooling is provided. In this embodiment, as the cooling means 15, a cooling pipe 15a having a double pipe structure for passing a refrigerant is provided along the material supply pipe 12 on the outer peripheral side of the material supply pipe 12, and A refrigerant such as water or cold air is supplied from the refrigerant introducing portion 15b into the cooling pipe 15a, and the material supply pipe 12 is cooled by the refrigerant flowing in the cooling pipe 15a, and the temperature in the material supply pipe 12 is The resin contained in the material W is prevented from being heated to a temperature at which it is melted, and thereafter, the refrigerant after cooling the material supply pipe 12 through the inside of the cooling pipe 15a as described above is led out from the refrigerant lead-out portion 15c. It is like that.

  Further, in this embodiment, as the heat insulating means 16 for heat insulating the outer peripheral portion of the material supply pipe 12 and the cooling pipe 15a, a cylindrical heat insulating member 16 made of a heat insulating material is arranged along the cooling pipe 15a. It is provided on the outer peripheral side of 15a. In this case, when the inside of the material supply pipe 12 is cooled by passing the refrigerant through the cooling pipe 15a provided on the outer peripheral side of the material supply pipe 12 as described above, the refrigerant is supplied into the kiln cylindrical body 20 as described above. The gas of the resin vaporized from the material W is prevented from coming into direct contact with and cooling the outer peripheral portion of the cooling pipe 15a, and the vaporized resin is prevented from solidifying and adhering in the outer peripheral portion of the cooling pipe 15a Ru. In addition, it is possible to prevent the cooling efficiency from being lowered by the heat of the cooling pipe 15a due to the heat in the kiln cylindrical body 20.

  Further, when the material W is supplied from the supply port 12a of the material supply pipe 12 into the kiln cylinder 20 at the temperature at which the resin is vaporized as described above, the heat in the kiln cylinder 20 supplies the above-mentioned The resin contained in the material W in the material supply pipe 12 in the vicinity of the supply port 12a may be melted and be adhered to the material supply pipe 12 in the form of an adhesive body by being introduced into the material supply pipe 12 through the port 12a. .

  For this reason, in this embodiment, as shown in FIGS. 1 to 3, the heat in the kiln cylinder 20 is at a position downstream of the material feed pipe 12 in the material feed direction with respect to the material feed pipe 12. The cylindrical heat insulating member 16 is a radiation shield 17 formed of a metal plate having a diameter larger than that of the supply port 12a so as to suppress the introduction into the material supply pipe 12 through the supply port 12a. The heat shields 18 hold the plurality of support rods 18 provided from the front end of the nozzle toward the downstream side in the material feeding direction, and the radiation shield 17 guides the heat in the kiln cylinder 20 into the material supply pipe 12 through the supply port 12a. I try to prevent it from being damaged.

  Further, since the support 18 of the radiation shield 17 is attached to the heat insulating member 16, the radiation shield 17 is cooled by the cooling pipe 15a, and the resin gas adheres to the radiation shield 17 as an adhesive. I have no idea.

  Moreover, in the rotary kiln for material processing in this embodiment, when rotating the kiln cylinder 20 as described above, as shown in FIG. 1 to FIG. 3, the supply side on which the material supply pipe 12 is provided, and While providing the pair of supporting rollers 21 and 21 rotatably supporting the bottom of the kiln cylindrical body 20 from both sides, respectively, at the position of the outlet side where the lead-out portion 30 of FIG. At a portion, a rotating device 22 for rotating the kiln cylinder 20 in the circumferential direction by a rotating motor 22a is provided. The rotation device 22 may have any structure such as rotating a chain (not shown) wound around the outer periphery of the kiln cylinder 20 by the rotation motor 22a.

  Moreover, in heating the kiln cylinder 20 rotated in this way, in this embodiment, between the support rollers 21 and 21 in the said supply side and delivery side which support the said kiln cylinder 20 rotatably. In this case, a cylindrical heat insulation furnace wall 50 made of a heat insulating material is provided on the outer peripheral side of the kiln cylindrical body 20 so as to form a space portion S of the required space and the outer periphery of the kiln cylindrical body 20 A heating device 51 such as a heater for heating the kiln cylinder 20 is provided on the inner peripheral side of the heat insulation furnace wall 50 so as to face the outer periphery of the heat insulating container 20. In this embodiment, the heating device 51 such as a heater is provided on the inner peripheral side of the adiabatic furnace wall 50 in heating the kiln cylindrical body 20. However, the outer periphery of the adiabatic furnace wall 50 and the kiln cylindrical body 20 is provided. Hot air can be introduced into the space S between them to heat the kiln cylinder 20.

  Here, in this embodiment, the heat of the space S heated by the heating device 51 is prevented from leaking out from between the adiabatic furnace wall 50 and the kiln cylinder 20, At both axial ends of the heat insulation furnace wall 50, holding portions 52 are provided toward the kiln cylinder 20 for closing the gaps between the kiln cylinder 20 and rotatably holding them, A heat insulating material 23 of a required width is provided on the outer periphery of the kiln cylinder 20 at a position facing the holding unit 52, and the space between the holding unit 52 of the heat insulation furnace wall 50 and the heat insulator 23 of the kiln cylinder 20 is rotated. An elastic seal 53 is provided which closes in a possible state.

  Further, in the rotary kiln for material processing in this embodiment, in order to suppress leakage of gas and heat from the connection between the kiln cylindrical body 20 and the lead-out portion 30 or the exhaust portion 40, the lead-out portion While providing the heat insulating material 24 of a required width at the outer peripheral side end of the kiln cylindrical body 20 at the lead-out part side to which 30 is connected, the space between the thermal insulation material 24 of the kiln cylindrical body 20 is rotatable at the lead-out part 30 While providing the elastic seal 33 closed in the state, and providing the heat insulating material 25 of the required width at the outer peripheral side end of the kiln cylinder 20 on the exhaust side to which the exhaust unit 40 is connected, An elastic seal 42 is provided to close the space between the heat insulator 20 and the heat insulator 25 in a rotatable state.

  Here, since the elastic seals 33, 42, 53 lose their elasticity and sealability when heated, they are protected by the heat insulating materials 23, 24, 25, so as not to directly touch the surface of the kiln cylinder 20 which is heated. ing.

  Further, the section A provided with the heat insulating material 23 functions as a "heat insulating zone", which moderates the temperature change from the high temperature space portion S of the kiln cylinder 20 itself to the low temperature cooling portion C, which causes a rapid temperature change. In this way, the cylinder 20 itself is prevented from being deformed.

  In the present invention, since the resin contained in the material W can thus minimize the chance of being in the adhesive state, the adhesive of the resin adheres and accumulates in the kiln cylinder 20 and the material supply pipe 12. It is possible to provide a rotary kiln free from troubles of material W transport.

11: material guide portion 12: material supply pipe 12a: supply port 13: transport screw 14: motor 15: cooling means 15a: cooling pipe 15b: refrigerant introduction portion 15c: refrigerant lead portion 16: heat insulation means (heat insulation member)
17: Radiation shield 18: Support column 20: Kiln cylinder 21: Support roller 22: Rotation device 22a: Rotation motor 23: Heat insulation material 24: Heat insulation material 25: Heat insulation material 30: Lead part 31: Lead port 32: Carrier gas supply port 33: elastic seal 40: exhaust part 41: exhaust passage 42: elastic seal 50: heat insulation furnace wall 51: heating device 52: holding part 53: elastic seal A: section (heat insulation band)
C: Cooling part S: Space part W: Material

Claims (7)

  The resin-containing material is supplied into a cylindrical kiln cylinder rotatably supported through a material supply pipe, and the kiln cylinder is heated and rotated to supply the material into the kiln cylinder. In the material processing rotary kiln, the material is transported while being heated, and the resin in the material is vaporized and exhausted from the exhaust portion for processing, the material is passed through the material supply pipe, and the kiln cylinder is used. The body is transported to a position where the resin contained in the material is vaporized, and the material is supplied from the supply port of the material supply pipe into the kiln cylinder, and the material in the material supply pipe is Cooling means for preventing the resin contained therein from being heated to a temperature at which the resin is melted, and heat insulating means for insulating the outer periphery of the material supply pipe and the cooling means. Material processing rotary kiln characterized and.   The rotary kiln for material processing according to claim 1, wherein a transport screw for transporting the material supplied into the material supply pipe is provided in the material supply pipe.   In the rotary kiln for material processing according to claim 1 or claim 2, as the cooling means, a cooling pipe having a refrigerant passage on the outer peripheral side of the material supply pipe is provided along the material supply pipe, and the cooling is performed. A rotary kiln for material processing, characterized in that the material supply pipe is cooled by passing a refrigerant through a refrigerant passage in the pipe.   In the rotary kiln for material processing according to claim 3, a cylindrical heat insulating member is provided along the cooling pipe on the outer peripheral side of the cooling pipe as the heat insulating means. Rotary kiln.   In the rotary kiln for material processing according to any one of claims 1 to 4, the heat in the kiln cylinder is at a position downstream of the material feed direction from the supply port for supplying the material into the kiln cylinder from the material supply pipe. What is claimed is: 1. A rotary kiln for material processing, comprising: a radiation shield for suppressing the introduction into the material supply pipe through the supply port.   The rotary kiln for material processing according to claim 5, characterized in that a metal plate is used for the radiation shield, and the radiation shield is supported by a support provided from the heat insulation member toward the downstream side in the material feeding direction. Rotary kiln for material processing.   In the rotary kiln for material processing according to any one of claims 1 to 6, when the resin in the material is vaporized and exhausted from the exhaust unit, the exhaust unit is made of a material in a kiln cylinder. A rotary kiln for material processing characterized in that it is provided on the supply side to be supplied.

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