JP2007144252A - Method for melting waste asbestos - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for melting waste asbestos safely at a low cost. <P>SOLUTION: The method for melting waste asbestos comprises the steps of: supplying packed waste asbestos and incineration ash of waste A to a hermetically-sealable mixing means 32; tearing a packing material of the waste asbestos in the hermetically-sealed mixing means 32 to expose the waste asbestos and mix the exposed waste asbestos with the incineration ash; housing the incineration ash-mixed waste asbestos in a rotary kiln 6; and burning a part of the waste and drying the remainder of the waste by distillation by utilizing the heat of combustion in a gasification furnace 1 to generate combustible gas, introducing the generated combustible gas into a combustion furnace 2 to burn the introduced combustible gas and introducing at least a part of exhaust gas from the combustion furnace 2 into the rotary kiln 6 to heat a mixture of the waste asbestos with the incineration ash and melt the waste asbestos. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for melting waste asbestos produced by, for example, discarding building materials such as asbestos slate and sprayed asbestos.

  Asbestos (asbestos) is a fibrous mineral and has excellent fire resistance and heat resistance, and therefore is widely used as a building material such as asbestos slate and sprayed asbestos. However, it has been pointed out that the asbestos causes mesothelioma and asbestosis when entering the body from the respiratory system in the form of fine fibers.

  Therefore, when disposing of building materials containing asbestos such as asbestos slate and sprayed asbestos, waste asbestos such as building materials can be double-packed with water-resistant materials such as plastic materials and disposed of in landfills. Has been done. However, in recent years, it has become difficult to secure land for the disposal site, and in the landfill disposal, there is a problem that the fiber form of asbestos is maintained as it is and is not detoxified.

  In order to solve the problem, it has been proposed to melt the waste asbestos (see, for example, Patent Document 1). There are various types of asbestos, such as chrysotile, amosite, and clondrite, and their melting points are 1521 ° C for chrysotile, 1399 ° C for amosite, and 1193 ° C for clondrite. Therefore, when melting the waste asbestos, generally, a flux such as glass cullet is added to the waste asbestos to lower the melting point.

However, when the flux is added to the waste asbestos, the double packaging must be unpacked, and there is a disadvantage that a worker engaged in the work may suck the asbestos fine fibers. In addition, the melting process requires a fuel for melting the waste asbestos, and the use of the flux further increases the processing cost.
Japanese Patent Laid-Open No. 9-19672

  An object of the present invention is to provide a method capable of solving such inconvenience and melting and processing waste asbestos safely and inexpensively.

  In order to achieve such an object, the method for melting waste asbestos according to the present invention includes a step of supplying waste asbestos in a packaged state and incineration ash of waste to a sealable mixing means, A package of the waste asbestos is opened in a mixing means to expose the asbestos, and the waste asbestos and the incinerated ash are mixed, and the mixed waste asbestos and the incinerated ash are stored in a rotary kiln. A step of combusting a part of the waste in the gasification furnace, dry-burning the remainder of the waste with the heat of combustion to produce a combustible gas, and introducing the combustible gas into the combustion furnace for combustion And a step of introducing at least a part of the combustion exhaust gas of the combustion furnace into the rotary kiln, and heating the mixture of the waste asbestos and the incinerated ash to melt the waste asbestos.

  In the method of the present invention, first, the packaged waste asbestos and the waste incineration ash are supplied to the mixing means. The mixing means can be sealed, and in a sealed state, the packaging of the waste asbestos is opened to expose the asbestos, and the waste asbestos and the incineration ash are mixed.

  By doing in this way, the waste asbestos need only be supplied to the mixing means while being packed and does not need to be unpacked. Further, since the mixing means can be sealed, the exposed waste asbestos can be prevented from being scattered in the atmosphere. Therefore, according to the method of the present invention, waste asbestos can be treated safely.

In the method of the present invention, next, the mixture of the waste asbestos and the incinerated ash obtained by the mixing means is stored in a rotary kiln, and the waste asbestos is melted by heating the mixture in the rotary kiln. At this time, the incinerated ash contains components such as SiO ₂ , CaO, Al ₂ O ₃ , and chloride, and thus acts as a flux that lowers the melting point of the waste asbestos. As a result, the waste asbestos has a lower melting point and is easily melted by heating in the rotary kiln.

  Further, in the method of the present invention, the rotary kiln is heated by combusting a part of the waste in a gasification furnace to dry-distill the remainder of the waste by the combustion heat to generate a combustible gas, It introduce | transduces a property gas into a combustion furnace, burns, and introduce | transduces at least one part of combustion exhaust gas of this combustion furnace into this rotary kiln. The incinerated ash obtained in the gasifier can be used for mixing with the waste asbestos.

  Therefore, according to the method of the present invention, it is not particularly necessary to use a flux or fuel for melting the waste asbestos, and the waste asbestos can be melted at low cost.

  In the method of the present invention, the waste asbestos may be double-packed with a water-resistant material such as a plastic material.

  Further, in the method of the present invention, the mixing means sandwiches the waste asbestos in the packed state by two screw conveyors provided in parallel to each other, and rotates the screw conveyors in opposite directions. Preferably, the waste asbestos packaging is cleaved to expose the asbestos.

In the method of the present invention, the waste is selected from the group consisting of waste paper, waste wood and waste plastic because the incinerated ash contains components such as SiO ₂ , CaO, Al ₂ O ₃ and chloride. Preferably, the at least one kind of waste produced.

  Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a system configuration diagram of a dry distillation gasification incineration apparatus used in the present embodiment.

  The waste asbestos melting treatment method of this embodiment can be advantageously performed by using the dry distillation gasification incineration processing apparatus shown in FIG.

The dry distillation gasification incineration processing apparatus shown in FIG. 1 stores at least one kind of waste A selected from the group consisting of waste paper, waste wood, and waste plastic, and performs dry distillation / gasification and combustion / ashing. Tighten the gasification furnace 1, 1 of the 2 groups, and waste combustion furnace 2 for burning the resulting combustible gas by the dry distillation of the a, temperature sensor 3 for detecting the combustion temperature T ₁ of the combustible gas in the combustion furnace 2, the An oxygen supply means 4 for supplying oxygen (air) to the gasification furnace 1, an oxygen supply means 5 for supplying oxygen (air) to the combustion furnace 2, and at least a combustion exhaust of the combustible gas connected to the combustion furnace 2 A rotary kiln 6 is provided which partially introduces and heats a mixture B of waste asbestos and incineration ash of waste A to melt the waste asbestos. The dry distillation gasification incineration apparatus is further connected to a suction introducing means 7 for sucking exhaust gas from the rotary kiln 6 and introducing it into the combustion furnace 2, a pressure sensor 8 for detecting the pressure P ₁ in the combustion furnace 2, and the combustion furnace 2. A discharge means 9 for sucking the combustion exhaust of the combustible gas and the exhaust of the rotary kiln 6 and releasing it into the atmosphere is provided.

  A gas inlet 11 having a door 10 that can be opened and closed is formed on the upper surface of the gasifier 1 so that the waste A can be charged into the gasifier 1 from the gas inlet 11. The gasification furnace 1 is substantially shut off from outside air when the charging door 10 is closed. The lower part of the gasification furnace 1 is formed in a truncated cone shape by sloped side wall parts 12 and a bottom face part 13 projecting downward, and the inside of the gasification furnace 1 is formed on the outer surface parts of the side wall parts 12 and the bottom face part 13. An isolated empty chamber 14 is formed, and the empty chamber 14 is connected to the oxygen supply means 4. The vacant chamber 14 supplies oxygen supplied from the oxygen supply means 4 to the inside of the gasifier 1 through a plurality of air supply nozzles 15 provided on the side wall portion 12 and the bottom surface portion 13. .

  An ignition device 16 composed of an ignition burner or the like is attached to the lower side of the gasification furnace 1. The ignition device 16 generates a combustion flame toward the inside of the gasification furnace 1 by burning fuel such as auxiliary combustion oil supplied from a fuel supply device (not shown). Waste A is ignited. In addition, a water jacket 17 isolated from the inside of the gasification furnace 1 is formed on the outer periphery of the gasification furnace 1 as a cooling structure, and the water jacket 17 is a water supply (not shown) provided outside the gasification furnace 1. Water is supplied from the device.

  In the combustion furnace 2, the gas passage 19 led out from the connection portion 18 provided in the upper part of each gasification furnace 1 is connected to the base portion thereof, and the switching valve 19 a provided in the gas passage 19 is switched to switch the 2 Combustible gas generated by dry distillation of the waste A is introduced from either one of the basic gasification furnaces 1 and 1. An ignition device 20 composed of an ignition burner or the like is attached to the rear end portion of the combustion furnace 2 so as to ignite combustible gas introduced from the gas passage 19. The ignition device 20 is configured by an ignition burner or the like, similar to the ignition device 16, and burns fuel such as auxiliary combustion oil supplied from a fuel supply device (not shown) to cause a combustion flame toward the inside of the combustion furnace 2. It is supposed to give birth.

  A vacant chamber 21 isolated from the inside of the combustion furnace 2 is formed on the outer periphery of the combustion furnace 2, and the vacant chamber 21 is connected to the oxygen supply means 5. The vacant chamber 21 supplies oxygen supplied from the oxygen supply means 5 to the inside of the combustion furnace 2 through a plurality of nozzle holes 22 provided on the outer peripheral wall of the combustion furnace 2.

  Further, an exhaust outlet 23 for supplying a part of the exhaust gas generated by the combustion of the combustible gas to the rotary kiln 6 is provided on the lower side of the combustion furnace 2, and the exhaust of the rotary kiln 6 is introduced on the upper side. An exhaust inlet 24 is provided. The upper part of the combustion furnace 2 is connected to a discharge means 9 for discharging the combustion exhaust of the combustible gas and the exhaust of the rotary kiln 6.

Further, a temperature sensor 3 for detecting the combustion temperature T ₁ of the combustible gas and a pressure sensor 8 for detecting the pressure P ₁ in the combustion furnace 2 are provided at the lower part of the combustion furnace 2. The temperature sensor 3 outputs the detection signal to the oxygen supply means 4 and 5, and the pressure sensor 8 outputs the detection signal to the suction introducing means 7 and the discharge means 9. .

  The oxygen supply means 4 for supplying oxygen to the gasification furnace 1 includes an oxygen supply source 25 provided outside the gasification furnace 1, a main oxygen supply pipe 26 led out from the oxygen supply source 25, and a main oxygen supply pipe 26 and an auxiliary oxygen supply pipe 27 branched from the gas furnace 1 and connected to the empty chamber 14 of each gasifier 1. The auxiliary oxygen supply pipe 27 is provided with an opening / closing valve 28 that is opened and closed according to a detection signal input from the temperature sensor 3.

  The oxygen supply means 5 for supplying oxygen to the combustion furnace 2 includes an oxygen supply source 25, a main oxygen supply pipe 26 led out from the oxygen supply source 25, and a branch from the main oxygen supply pipe 26. An auxiliary oxygen supply pipe 29 connected to the empty chamber 21 is included. The auxiliary oxygen supply pipe 29 is provided with an opening / closing valve 30 that is opened and closed according to a detection signal input from the temperature sensor 3.

The rotary kiln 6 is provided with a rotary furnace 31 that is gently inclined along the length direction, an inlet provided above the rotary furnace 31, and into which packed waste asbestos and incineration ash of the waste A are input. 32 and an outlet 33 provided below the rotary furnace 31 for taking out the melted waste asbestos. The rotary furnace 31 is connected to the exhaust outlet 23 of the combustion furnace 2 at the lower part thereof, and the suction introduction means 7 for sucking the exhaust gas of the rotary kiln 6 and introducing it into the combustion furnace 2 is connected to the upper part thereof. Further, the rotary furnace 31 is provided with a pressure sensor 34 for detecting the internal pressure P ₂ , and the pressure sensor 34 outputs a detection signal to the suction introducing means 7.

Also, inlet 32 is, for example, is configured to be sealed by double lid (not shown) or the like, depending on the outlet temperature T ₂ detected by the temperature sensor 32a provided in the vicinity of the outlet of the rotary furnace 31 controls the motor 32b and a screw conveyor 32c driven by a motor 32b. Two screw conveyors 32c are provided in parallel (only one is shown in FIG. 1), and the packaged waste asbestos is sandwiched between the screw conveyors 32c, 32c. Both screw conveyors 32c and 32c rotate in opposite directions to open the waste asbestos package sandwiched between the two, thereby exposing the waste asbestos and crushing the exposed waste asbestos. Mix with waste A incineration ash. Then, the mixed waste asbestos and the incineration ash are supplied to the rotary furnace 31.

The suction introducing means 7 includes a duct 35 connecting the upper part of the rotary furnace 31 of the rotary kiln 6 and the exhaust intake 24 of the combustion furnace 2, a cyclone type dust collector 36 provided in the middle of the duct 35, and a fan 37. . The fan 37 sucks exhaust gas from the rotary kiln 6 so that the pressure P ₂ inside the rotary kiln 6 is always lower than the internal pressure P ₁ of the combustion furnace 2 in accordance with the detection signals input from the pressure sensors 8 and 34, and burns. The pressure of the exhaust gas introduced into the furnace 2 is set higher than the internal pressure P ₁ of the combustion furnace 2.

The discharge means 9 is provided at the end of the duct 38 connected to the upper part of the combustion furnace 2, the cooling tower 39 provided in the middle of the duct 38, the chemical adsorption device 40, the bag filter 41, the fan 42. It consists of a chimney 43. The chemical adsorption device 40 chemically removes a substance that causes environmental pollution when the combustion exhaust of the combustible gas discharged from the combustion furnace 2 contains an odorous component or the like when released into the atmosphere as it is. It is changed to a stable substance and removed from the combustion exhaust gas. In the present embodiment, the chemical adsorption device 40 is configured such that hydrogen chloride gas in the combustion exhaust gas reacts with slaked lime and is removed as calcium chloride. Further, the fan 42 detects the combustion exhaust of combustible gas from the combustion furnace 2 so that the pressure P ₁ inside the combustion furnace 2 is always maintained at a substantially constant pressure according to the detection signal input from the pressure sensor 8. The exhaust from the rotary kiln 6 is sucked.

  Next, the operation of the dry distillation gasification incineration processing apparatus shown in FIG. 1 will be described.

  When incinerating the waste A, first, the charging door 10 of one gasification furnace 1 is opened, and the waste A is charged into the gasification furnace 1 from the charging port 11. Next, after closing the charging door 10, the ignition device 16 is operated for a predetermined time, thereby igniting the waste A in the gasification furnace 1 and starting partial combustion of the waste A.

  When the partial combustion of the waste A is started, the lower layer portion of the waste A gradually burns, and by the combustion heat, dry distillation of the upper layer portion of the waste A is started and combustible by the dry distillation. Production of sex gas is started. The combustible gas is introduced from the gasification furnace 1 into the combustion furnace 2 through the gas passage 19. In the combustion furnace 2, the ignition device 20 is operated for a predetermined time to ignite the introduced combustible gas, thereby starting spontaneous combustion of the combustible gas.

The combustion temperature T ₁ of the combustible gas is detected by the temperature sensor 3, and a detection signal is output to the on-off valve 28 of the oxygen supply unit 4 and the on-off valve 30 of the oxygen supply unit 5. At this time, the on-off valve 28 of the oxygen supply means 4 determines in advance the combustion temperature T ₁ of the combustible gas as a combustion temperature at which the combustible gas can spontaneously combust according to the detection signal input from the temperature sensor 3. The degree of opening of the combustible gas is controlled by automatically adjusting the opening so as to substantially maintain the set temperature.

Specifically, the automatic adjustment of the opening degree of the opening / closing valve 28 is performed by increasing the opening degree of the opening / closing valve 28 and increasing the amount of oxygen supplied to the gasifier ₁ when the combustion temperature T1 becomes lower than the set temperature. The combustion of the lower layer of the waste A is promoted to increase the generation of the combustible gas. Conversely, when the combustion temperature T ₁ of becomes higher than the set temperature, and decreases the opening of the opening and closing valve 28 decreases the amount of oxygen supplied to the gasification furnace 1, to suppress the combustion of the lower portion of the waste material A Reducing the generation of the combustible gas.

The on-off valve 30 of the oxygen supply means 5 is oxygen required for complete combustion of the combustible gas introduced according to the combustion temperature T ₁ of the combustible gas according to the detection signal input from the temperature sensor 3. Is automatically adjusted so as to be supplied to the combustion furnace 2. Specifically, the automatic adjustment of the opening degree of the on-off valve 30 is performed by increasing the amount of combustible gas introduced into the combustion furnace 2 and increasing the combustion temperature T _{1 in} the initial stage of the dry distillation of the waste A. As the temperature rises, the opening degree is increased to increase the amount of oxygen supplied to the combustion furnace 2. Further, at the stage of the dry distillation of the waste material A progresses stably, increase or decrease the degree of opening in accordance with the slight increase or decrease in the combustion temperature T ₁ of the combustible gas to adjust the oxygen supply to the combustion furnace 2, which In this way, an amount of oxygen that can burn the combustible gas introduced into the combustion furnace 2 is mixed with the combustible gas.

  As described above, when the dry distillation gasification of the waste A proceeds stably in the gasification furnace 1, the combustion of the combustible gas introduced from the gasification furnace 1 into the combustion furnace 2 also proceeds accordingly. Thus, a part of the combustion exhaust of the combustible gas is introduced into the rotary kiln 6 from the exhaust outlet 23.

  In the rotary kiln 6, first, waste asbestos that has been double-packed with a water-resistant material such as a plastic material and the incineration ash of the waste A are input to the input port 32. The charged waste asbestos in the packed state is sandwiched between two screw conveyors 32c and 32c. Therefore, by rotating the screw conveyors 32c and 32c in opposite directions, the packaging of the waste asbestos is cleaved by the screw edges of the screw conveyors 32c and 32c, and the waste asbestos is exposed. At this time, the insertion port 32 is sealed with a double lid or the like as described above, and the exposed waste asbestos can be prevented from scattering into the atmosphere.

  The waste asbestos is further crushed by the screw conveyors 32c and 32c in the closed inlet 32 as described above, and mixed with a fragment of water-resistant material such as the plastic material, incineration ash of waste A, Mixture B is formed. The mixture B is conveyed to the end of the charging port 32 by the screw conveyors 32c and 32c, and is charged into the rotary furnace 31 from the end.

  The mixture B charged into the rotary furnace 31 as described above is charged from above the rotary furnace 31 that is gently inclined along the length direction as described above, and gradually decreases as the rotary furnace 31 rotates. Move in the direction of the outlet 33. Therefore, when the combustion exhaust of the combustible gas is introduced from the lower part of the rotary furnace 31, the mixture B moving from the upper side of the rotary furnace 31 toward the lower outlet 33 as described above is heated.

  When the mixture B is heated, the incineration ash of the waste A acts as a flux of the waste asbestos, so that the waste asbestos in the mixture B has a melting point that is easily melted and detoxified by the heating. Is done. The mixture B also includes fragments of the water-resistant material, but the fragments burn by being heated in the rotary furnace 31, and the incineration ash together with the incineration ash of the waste A is the waste asbestos. Acts as a flux.

  Then, the melted waste asbestos is taken out from an outlet 33 provided below the rotary furnace 31. At this time, since the waste asbestos is melted and rendered harmless as described above, it can be handled safely.

  In the rotary furnace 31, the combustion exhaust of the combustible gas cooled by the heating of the mixture B and the gas generated by the heating of the mixture B are sucked into the fan 37 as the exhaust of the rotary kiln 6, and the exhaust inlet of the combustion furnace 2 24 is introduced into the combustion furnace 2. At this time, the exhaust from the rotary kiln 6 may contain fine pieces of the waste asbestos, but the fine pieces are collected by the cyclone type dust collector 36 provided in the middle of the duct 35. Can be prevented from scattering into the atmosphere. The combustion exhaust of the combustible gas and the exhaust of the rotary kiln 6 are sucked into the fan 42 through the duct 38 and discharged from the chimney 43 to the atmosphere.

When the exhaust from the rotary kiln 6 is introduced into the combustion furnace 2, the power of the combustible gas introduced from the gasification furnace 1 and the exhaust becomes unbalanced, and the combustion of the combustible gas in the combustion furnace 2 is performed. May become unstable. Therefore, the fan 42 exhausts the combustible gas in the combustion furnace 2 and keeps the internal pressure P ₁ of the combustion furnace 2 at a substantially constant pressure according to the detection signal input from the pressure sensor 8. The exhaust from the rotary kiln 6 is sucked so that the combustible gas is burned stably.

In addition, the fan 37 sucks the exhaust of the rotary kiln 6 so that the pressure P ₂ inside the rotary kiln 6 is always lower than the internal pressure P ₁ of the combustion furnace 2 according to the detection signals input from the pressure sensors 8 and 34. The pressure of the exhaust gas introduced from the fan 37 into the combustion furnace 2 is controlled to be higher than the internal pressure P ₁ of the combustion furnace 2. By doing so, the combustion exhaust of the combustible gas is smoothly sucked into the rotary kiln 6 from the combustion furnace 2, and the exhaust of the rotary kiln 6 is smoothly introduced into the combustion furnace 2.

At this time, since the rotary furnace 31 of the rotary kiln 6 has a gap in a large amount, the pressure P ₂ in the rotary kiln 6 is greater than the atmospheric pressure, fines of the waste asbestos scattered into the air from the rotary kiln 6 There is a risk of environmental pollution. Therefore, the fan 37, as will be maintained at a negative pressure relative to the pressure P ₂ is always atmospheric pressure of the rotary kiln 6, by sucking the exhaust rotary kiln 6, said waste asbestos is scattered into the air It can be surely prevented.

When the amount of the mixture B introduced into the rotary kiln 6 is large, the exhaust gas of the rotary kiln 6 becomes low temperature, and when such exhaust gas is introduced into the combustion furnace 2, the combustible gas in the combustion furnace 2 is reduced. There is a risk of inhibiting combustion. Therefore, in the rotary kiln 6, when the outlet temperature T ₂ detected by the temperature sensor 32a is lower than a predetermined temperature reduces the rotational speed of the motor 32b, the mixture B to be supplied to the rotary furnace 31 by the screw conveyor 32c It is designed to lose weight. Thus, after reduction of the sludge-like waste fed to the rotary furnace 31, when the outlet temperature T ₂ detected by the temperature sensor 32a has recovered to or higher than a predetermined temperature, the normal value the rotation speed of the motor 32b Returned to

  Since the combustion exhaust of the combustible gas and the exhaust of the rotary kiln 6 are hot, they are cooled by being introduced into the large capacity cooling tower 39 in the middle of the duct 38 before being discharged from the chimney 43 as described above. . If the combustion exhaust gas contains a malodorous component or the like, the chemical adsorption device 40 provided in the middle of the duct 38 converts the malodorous component or the like into a stable substance and removes it from the combustion exhaust gas. Therefore, environmental pollution due to the malodorous component or the like can be prevented. Furthermore, the fine dust contained in the combustion exhaust gas is collected by the bag filter 41 provided in the middle of the duct 38, and the dust can be prevented from scattering into the atmosphere.

  Further, in the dry distillation gasification incineration processing apparatus shown in FIG. 1, when the dry distillation of the waste A in one gasification furnace 1 is almost finished, the new waste A is charged into the other gasification furnace 1 in the same manner as described above. Ignite and start incineration. If the generation of combustible gas in the first gasification furnace 1 is stopped, the gas passage 19 is immediately switched to be connected to the other gasification furnace 1 by the switching valve 19a, and the combustible gas in the combustion furnace 2 is changed. Ensure that combustion is not interrupted. Thus, by continuously switching the two gasification furnaces 1 and 1 and performing the waste incineration process, the rotary kiln 6 can be continuously operated without being stopped.

  The switching between the two gasification furnaces 1 and 1 should be performed smoothly by tracking the temperature in the gasification furnace 1 where the incineration of the waste A is performed over time immediately after ignition. Can do. Further, the incineration ash of the waste A is taken out from an ash outlet (not shown) provided at the lower part of the gasification furnace 1 after the temperature in the gasification furnace 1 is sufficiently lowered. , And can be used for melting treatment of the waste asbestos.

The system block diagram of the dry distillation gasification incineration processing apparatus used for the melt processing method of the waste asbestos of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Gasification furnace, 2 ... Combustion furnace, 6 ... Rotary kiln, 32 ... Mixing means, 32c ... Screw conveyor.

Claims (4)

Supplying the packaged waste asbestos and waste incineration ash to a sealing means capable of sealing;
Cleaving the packaging of the waste asbestos in the sealed mixing means to expose the asbestos, and mixing the waste asbestos and the incinerated ash;
Storing the mixed asbestos and the incinerated ash in a rotary kiln;
While combusting a part of the waste in the gasification furnace, the remainder of the waste is dry-distilled by the combustion heat to generate a combustible gas, the combustible gas is introduced into the combustion furnace and burned, Melting at least part of combustion exhaust gas from a combustion furnace into the rotary kiln, and heating the mixture of the waste asbestos and the incinerated ash to melt the waste asbestos. Method.   The method for melting waste asbestos according to claim 1, wherein the waste asbestos is double-packed with a water-resistant material.   The mixing means sandwiches the packaged waste asbestos by two screw conveyors provided in parallel to each other, and rotates the screw conveyor in opposite directions to tear the packaging of the waste asbestos. The method for melting waste asbestos according to claim 1 or 2, wherein the asbestos is exposed.   The waste asbestos according to any one of claims 1 to 3, wherein the waste is at least one kind of waste selected from the group consisting of waste paper, waste wood, and waste plastic. Melt processing method.

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