JP2003306722A - Method and apparatus for recovering metallic material from metallic waste stuck and mixed with organic matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain the improvement of a recovery rate and the conservation of energy when metal is recovered from metallic waste stuck and mixed with organic matter, to enhance the efficiency of the main stages, to miniaturize an apparatus, to minimize the loss in oxidation of metal, and to almost obviate the production of dioxins. <P>SOLUTION: Organic matter is separated and removed from metallic waste W stuck and mixed with the same to recover a metallic material P. In the method, a high temperature nonoxidizing gas G<SB>1</SB>is forcedly contacted with the metallic waste in a dry distillation area to promote dry distillation. A high temperature nonoxidizing gas G<SB>3</SB>is generated by the combustion between the nonoxidizing gas containing the generated dry distilled gas (pyrolytic combustible gas) G<SB>2</SB>and a fluid fuel and is circularly fed into a dry region. Thus, the economization of resources and the conservation of energy are attained, and the production of dioxins is almost obviated. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to heat a metal waste (hereinafter simply referred to as a metal waste) to which an organic material is adhered and mixed in a non-oxidizing atmosphere to dry-distill the organic material (pyrolysis gasification). The present invention relates to a method and an apparatus for recovering a metal by reducing the oxidation loss of the metal to zero and generating no dioxin, and separating the metal from an organic substance.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of effective use of resources and consideration for the environment, effective resources such as metal materials are recovered from discarded metal products such as steel, aluminum and copper and reused. A recycling system for detoxifying and treating the rest is being established. Many proposals have been made for such a recycling system.
However, in the conventional metal recovery system, there have been proposals on how to efficiently separate each material and obtain a high-quality metal material,
Few proposals have been made for the purpose of preventing metal oxidation loss during high temperature heating and energy saving of the entire system. Moreover, in the conventional combustion heating method, dioxins are generated by chlorine contained in the substance adhering to the metal waste and oxygen contained in the air, and it is necessary to perform secondary combustion of the combustion gas for decomposition thereof. However, as a result, the amount of fuel used per unit weight of metal waste becomes enormous, which is not economical.

Usually, used beverage cans, one-tower cans, drums or discarded microwave ovens, body parts such as refrigerators, aluminum sashes, broken pieces of building materials such as shutters, surfaces of metal waste such as aluminum foil. Are coated with organic compounds or synthetic polymer compounds such as paints, coating materials, adhesives, plastics, and paper. It has been studied to heat these organic compounds or synthetic polymer compounds into a pyrolysis gas by heating them in a non-oxidizing atmosphere, but the pyrolysis gas generated and its sensible heat are pyrolyzed in a non-oxidizing atmosphere. Recycling for process is not considered.

[0004]

SUMMARY OF THE INVENTION In an oxygen-free or non-oxidizing atmosphere, organic substances adhering to and mixed with metal waste are subjected to dry distillation gasification and separated to recover high-grade metals such as steel, aluminum and copper. The technology has the effect of reducing the environmental load such as dioxin and greenhouse gases and the effect of improving the yield of recovered materials, as compared with the technology of oxidizing and burning organic matter to separate it, but it saves resources, that is, improves yield. Further improvements have been demanded in terms of energy saving, that is, improvement of energy efficiency. The present invention has been made in view of the above points, and when recovering a metal from a metal waste to which an organic substance is adhered and mixed, the metal is prevented from being oxidized by pyrolysis gasification in a non-oxidizing (oxygen-free) atmosphere. In addition, it is an object of the present invention to provide a metal recovery method and a recovery device used for the same that can achieve thorough energy saving in the entire process system.

[0005]

Means for Solving the Problems The gist of the present invention for solving the above problems is as follows. (1) The metal waste (hereinafter referred to as “metal waste”) to which the organic matter adheres and is mixed is thermally decomposed in a high-temperature oxygen-free gas (hereinafter referred to as “non-oxidizing gas”) atmosphere to convert the metal waste into organic matter. When regenerating separated metal (hereinafter referred to as "metal material"), (1) Combustion with fluid fuel and less than stoichiometric amount of air or oxygen to generate non-oxidizing gas and sending it to the next process (Non-oxidizing gas generation process), (2) In the non-oxidizing gas atmosphere sent from the previous process, organic substances in metal waste are pyrolyzed to generate combustible pyrolysis gas, and organic substances and metals are separated. Process of recovering metallic material (pyrolysis process), (3) Process of completely combusting the combustible pyrolysis gas generated in the pyrolysis process with a theoretical amount of air or oxygen to generate combustion exhaust gas (complete combustion process) )
Adhesion of organic matter characterized by consisting of three steps of
A method for recovering metal materials from mixed metal waste. (2) The method for recovering a metal material according to (1), wherein the pyrolysis gas generated in the pyrolysis step is circulated and used as a part or all of the fluid fuel in the non-oxidizing gas generation step. (3) A feature is that a part of the combustion exhaust gas generated in the complete combustion process is circulated to the non-oxidizing gas generation process and is blown into the fluid fuel to generate the non-oxidizing gas (1) or (2). The method for recovering a metal material described. (4) The thermal decomposition step is a step in which it is combined with any one or both of the other complete combustion step and the non-oxidizing gas generating step, and is a step combined with any one of (1) to (3). The method for recovering a metal material described. (5) In the thermal decomposition step, when the metal waste is passed through the preheating / drying area to reach the dry distillation gasification area of the organic matter, and then sent to the cooling area for cooling by heat radiation to obtain a desired metal material. , High temperature non-oxidizing gas is forcibly contacted with metal waste in dry distillation area to promote dry distillation, and non-oxidizing gas containing generated pyrolyzable combustible gas is brought into direct or indirect contact with metal waste in preheating dry area to dispose of metal. It promotes preheating and drying of the material, while sensible heat of the metal material is transferred between the metal waste and the metal material through the partition as needed, and between the metal waste and the non-oxidizing gas. Recovered by heat transfer between solid and gas,
The method for recovering a metal material according to any one of (1) to (4), wherein the temperature change from the preheating / drying zone to the cooling zone is realized. (6) Granular or massive metal waste is packed in a substantially vertical cylindrical body to form a stack, and the high temperature non-oxidizing gas is discharged continuously or intermittently from the bottom of the cylindrical body. Alternatively, it is characterized in that the upper part of the stack is a dry zone and the gas feed part is a dry distillation zone by feeding the metal waste into the metal waste stack from an intermediate level and coming into contact with the metal waste in countercurrent (1). ~ The method for recovering a metal material according to any one of (5). (7) A low temperature non-oxidizing gas is fed from the bottom of the stack of metal materials heated to a desired temperature to bring the layers into countercurrent contact to perform heat exchange to cool the metal materials. (6) A method for recovering a metal material from a metal waste according to (6). (8) A horizontal non-oxidizing gas is fed from one end or the other end of a horizontal rotary cylinder that is rotatable around its axis, and organic matter is carbonized and gasified to be discharged as pyrolyzable combustible gas. Alternatively, the method for recovering a metal material from a metal waste according to any one of (1) to (6), wherein the metal material is discharged from the other end. (9) In a metal material recovery device in which granular or massive metal waste is fed from above a vertical cylindrical body, filled inside, and discharged from the bottom of the cylindrical body, the metal material is horizontally disposed at the middle and bottom of the cylindrical body. Alternatively, an inclined perforated plate is installed, and granular / lump-shaped metal waste is moved to the lower side of the cylindrical body by the action of gravity through the perforated plate, and the lower part of the intermediate perforated plate in the dry distillation area, and the bottom part. A metal material recovery device characterized in that a non-oxidizing gas in the temperature range of a dry region is fed into the lower part of a perforated plate and is made to flow through a granular or massive metal waste layered on the perforated plate. (10) A cylindrical body that rotates about an axis that is substantially parallel to the horizontal plane or that is inclined at a small angle, and is 0.5 to 15 degrees with respect to the axis of the cylindrical body. The inside of the tubular body is divided into two spaces along the axis by a partition plate that is inclined at an angle within the range, and the metal waste is discharged from one of the spaces through an opening provided at one end of the tubular body. It is moved to the other end of the cylindrical body by the rotation of the cylindrical body and the action of the inclined partition plate, and the opening provided in the inclined partition plate near the other end of the cylindrical body is moved. After that, the metal waste is moved to another space, and is moved toward the other end of the tubular body by the rotation of the tubular body and the action of the inclined partition plate, and through the opening provided at one end of the tubular body. A horizontal metal material recovery device for discharging metal materials from adhering and mixing organic materials, which is characterized by discharging metal materials. (11) At the other end of the tubular body, a gas inlet pipe is installed along the inner surface of the tubular body, and a high temperature non-oxidizing gas is fed in from the outside of the device, or air below the theoretical amount is fed in. A high-temperature non-oxidizing gas is generated in the apparatus, and the gas is brought into contact with the metal waste rolling in the cylindrical body (10). (12) Add a certain amount of metal waste, dry, dry-distill,
A plurality of rectangular or cylindrical containers that can be discharged as a metal material after cooling are installed side by side, and metal waste is put into these containers, and the high temperature non-oxidizing gas or A device for recovering a metal material from a metal waste adhering and mixed with an organic substance, characterized in that the weak oxidizing gas is continuously switched and introduced / discharged according to a predetermined algorithm to dry, dry-distill and cool the metal waste. . (13) Add a certain amount of metal waste, dry, dry-distill,
Metal waste is put into a rectangular or cylindrical container that can be discharged as a metal material after cooling, and the container is sequentially moved according to a predetermined algorithm to dry, dry-distill and cool the metal waste. A device for recovering metal materials from metal waste that has adhered and mixed organic substances, which is characterized in that

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 (a), (b), and (c) are diagrams explaining the process of the invention according to claims 1 to 3 in principle. That is, when the metal waste is recovered by thermally decomposing the organic matter in the high temperature non-oxidizing gas atmosphere of the metal waste W, first, in FIG. 1 (a), it is burned with the fluid fuel f and air or oxygen A below the theoretical amount. To generate the non-oxidizing gas G ₁ and send it to the next step (non-oxidizing gas generating step) and the non-oxidizing gas atmosphere sent from the previous step to generate the metal waste W.
A step (pyrolysis step) of thermally decomposing the organic substance therein to generate a flammable pyrolysis gas G ₂ to separate the organic material and the metal to recover the metal material P, and a flammable gas produced in the pyrolysis step There are three steps, a step of completely burning the pyrolysis gas G ₂ with a stoichiometric amount of air or oxygen A to generate a combustion exhaust gas G ₃ (complete combustion step). In the complete combustion process, the dioxins have undergone a high temperature combustion process, so that they are substantially zero. Also, in FIG. 1 (b),
The process in which the flammable pyrolysis gas G ₂ generated in the pyrolysis process in (a) is circulated and used as a part or all of the fluid fuel f in the non-oxidizing gas generation process is shown. Further, in FIG. 1C, a part of the combustion exhaust gas G ₃ generated in the complete combustion process is circulated to the non-oxidizing gas generation process,
The process of blowing the fluid fuel f into this to generate non-oxidizing gas is shown.

On the other hand, the non-oxidizing gas generating step, the thermal decomposition step and the complete combustion step can be carried out not only as independent steps but also in a combined or connected form centering on the thermal decomposition step. Is. For example, as shown in FIGS. 2 (a), (b) and (c), the thermal decomposition step and the complete combustion step are combined or connected ((a)), the thermal decomposition step and the non-oxidizing gas generation step are combined or connected. It is possible to show the thing ((b)), the thing ((c)) which combined or connected the non-oxidizing gas generation process, the thermal decomposition process, and the complete combustion process. By passing through the respective steps of the present invention shown in FIGS. 1 and 2, all the organic substances attached to and mixed with the metal waste are reused as thermal energy for drying / preheating the metal waste and pyrolyzing gasification. Moreover, the metal is almost completely recovered in the non-oxidizing atmosphere without oxidation loss.

FIG. 3 shows an example of a process in which the metal waste W introduced into the thermal decomposition apparatus 2 becomes a metal material portion P after passing through the dry zone 5, the dry distillation zone 6 and the cooling zone 7. Is. That is, the metal waste W, which is a raw material, is put into the drying zone 5 and becomes the dried waste W ₁ and enters the dry distillation zone 6, and further becomes the dry distilled waste W ₂ and enters the cooling zone 7, and the cooled waste. The product P (recovered metal material) is discharged. In addition, the dry zone 5 is a temperature range from room temperature to about 300 ° C., and the dry distillation zone 6 is 300 to 700 ° C. where organic matter is dry distilled and gasified
The temperature range and the cooling range 7 refer to the temperature range up to about 100 ° C., respectively.

In addition to the flow of this waste, gas is introduced and exhausted in each zone to carry out necessary processing. In the dry distillation area 6, the high temperature non-oxidizing gas and the metal waste are forcedly contacted with each other to promote the dry distillation, and the high temperature non-oxidizing gas used for this is the air A which is less than the theoretical amount in the high temperature non-oxidizing gas generator 1. And is a non-oxidizing gas G ₁ obtained by burning. If heat is insufficient during this combustion, A heavy oil, LP
A fluid fuel f such as G is added. The non-oxidizing gas g ₁ containing the dry-distilling gas generated in the dry-distilling zone 6 is sent to the dry-zone 5, where it is contacted with the waste heat to release heat to lower the temperature of the low-temperature non-oxidizing gas G _2.
And discharged through the flow diverter 3, one of which is fed to the device 1 and used for the combustion described above, and the other of which is the low temperature non-oxidizing gas G ₀ , which is the dry-distilled waste W ₂ in the cooling zone 7. Cool down
The gas itself is sent to the dry distillation zone 6 as the heated non-oxidizing gas g ₂ .

Further, the metal waste W ₂ heated in the dry distillation area
Has a large sensible heat, but in order to recover this sensible heat, heat is exchanged between W ₂ and the low temperature raw material metal waste W by the movement of atmospheric gas or through the heat transfer surface. Energy can be recovered and fuel consumption per unit weight can be significantly reduced.

Generally, the carbonization device is divided into a continuous type and a batch type, and the continuous type is further classified into a vertical (vertical) moving bed and a horizontal rotating bed. The pyrolysis gasification apparatus 2 and system shown in FIG. 3 can be used with any of these methods, and the optimum one is selected in consideration of the type, shape, size, and location conditions of the target metal waste. There is a need. For example, in the case of granular or lump-like uniform cans such as beverage cans pressed in bulk, vertical cylindrical bodies, fragments of the body of home appliances such as refrigerators, and broken pieces of building materials such as aluminum sashes and shutters. In the case of metal waste that is irregular in shape and is flat, and it is difficult to flow non-oxidizing gas on average in the layer, as in the case of If you want to dry-distill whole large metal waste such as beverage cans pressed into a refrigerator, refrigerator, etc., it is conceivable to use a batch type square or cylindrical device, but this is an example,
It is not fixed to this. For example, a horizontal rotary tubular device may be adopted for a granular or lump-like uniform product. Hereinafter, the method and apparatus of the present invention will be described in detail with reference to the drawings.

[Example of continuous vertical (vertical) moving bed] FIG.
3 is a specific example of the case where the vertical tubular body 11 is used in the pyrolysis gasification apparatus of FIG. 3, in which the raw materials are packed in the upper portion 11a of the tubular body in a laminated form, and the solid-state feed on the top thereof is used. The raw material is fed in through the inlet 12, and the solid outlet 1 is provided at the bottom of the tubular body 11.
3 is an example of a vertical cross-sectional view of the device according to the present invention when discharged from FIG. In FIG. 4, 11b is an upper portion 11a of the cylindrical body.
Is a raw material hopper installed above, and feeds granular or lumpy raw material to the upper portion 11a of the tubular body through the connecting portion 11c and the feed port 12 by the action of gravity to form a raw material stack 16. In FIG. 4, the connecting portion 11c is not limited to the one shown in the drawing, but may be inclined and may have a feed mechanism having a damper or the like.

At the intermediate level of the tubular body 11, there is provided an upper stage feed portion 17 formed by a substantially horizontal perforated plate 14 and an overhanging space portion 15, and the perforated plate 1
The raw material in the form of agglomerates, which is allowed to stand at an angle close to the angle of repose above 4,
By the action of the plurality of pushers 18, 18 'that move substantially horizontally along the upper surface of the perforated plate 14, the granular or lumpy raw material in a resting state is alternately collapsed and moved to the lower portion 11d of the tubular body. Then, the stack 16 'is formed.

On the other hand, the lower part 11d of the tubular body 11 is provided with a bottom side perforated plate 20 and a lower feed part 19 formed by a space part 21, and a substantially horizontal perforated plate 20.
A plurality of pushers 22, which move substantially parallel to each other,
By the action of 22 ', the granular and lumpy raw material in a resting state is alternately collapsed, dropped to the bottom of the tubular body 11, and discharged through the discharge port 13 to the outside of the apparatus. Reference numeral 23 denotes a known discharge mechanism, which is not necessarily limited to the one shown in the figure, and is inclined,
Alternatively, a damper mechanism may be provided. Further, 24 is a space formed in the lower part of the porous plate 14, and a non-oxidizing gas is sent into the space 24 from the gas inlet 25. Further, 26 is a space formed in the lower part of the porous plate 20 on the lower side, and the non-oxidizing gas in the dry region is fed into the space 26 through the gas inlet 27.

The non-oxidizing gas in the dry region fed from the inlet 27 passes through the perforated plate 20 and the rest portion of the agglomerated raw material facing the spaces 26 and 21, and the raw material stack 16 'in the lower portion 11d of the tubular body. To cool the high temperature raw material, and the temperature of the gas itself rises to reach the space 24 formed in the lower part of the perforated plate 14 of the upper feeding part 17 and is fed in through the inlet 25. The non-oxidizing gas in the high temperature range becomes a non-oxidizing gas in the dry distillation region, and the perforated plate 14 and the space 24, 1
The upper part 11 of the tubular body through the rest part of the agglomerate raw material facing 5
It flows up through the stack 16 in a and is discharged from the device through the gas discharge port 28.

The high-temperature non-oxidizing gas flowing up through the stack 16 heats the granular or lumpy raw material to dry-distill it and dry it, and at the same time, lowers its temperature and becomes a low temperature and is discharged from the gas discharge port 28 to the outside of the apparatus. To be done. Although not shown in FIG. 4,
A part of the exhaust gas is part of the lower part 1 of the cylindrical body by a known method.
Through the gas inlet 27 installed at the bottom of 1d, it flows through the layer 16 'of the agglomerate raw material. The remaining low-temperature non-oxidizing gas discharged from the gas outlet 28 to the outside of the apparatus is a high-temperature non-oxidizing gas generated by a known fuel combustion means (not shown) from the gas inlet 25 installed in the upper feeding part 17 to the space 24. The raw material stack 1 in the lower part 11d of the tubular body.
6'is mixed with a non-oxidizing gas flowing up through it to obtain a non-oxidizing gas in the dry distillation region, which is fed into the raw material laminate 16 through the porous plate 14 and heated.

FIG. 5 shows examples of various shapes of the cross section I-I 'in the apparatus of FIG. [A] in FIG. 5 is a square,
[B] is a corner cut rectangle, [C] is a circle, and [D] is an ellipse, but the tubular body in the device of the present invention is not limited to these and can have any cross-sectional shape.

A transverse section II- of the upper feed section 17 in FIG.
A sectional view of II 'is shown in FIG. The perforated plate 14 has openings 29, 29 'for the lower portion 11d of the tubular body at both ends thereof,
By alternately operating the plurality of cylindrical pushers 18 and 18 ′, the granular or lumpy raw material which is in a resting state on the perforated plate 14 is alternately fed from the openings 29 and 29 ′ by the action of gravity to the upper feeding portion 17. It is moved downward, that is, to the upper part of the lower part 11d of the tubular body. In FIG. 6, the perforated plate is not limited to the one shown in the figure, and may have holes up to the vicinity of the openings 29, 29 ', or may be a lattice-shaped or slit-shaped plate.
Further, the pusher is a cylinder type that reciprocates alternately from both sides along the upper surface of the perforated plate 14, and the number thereof is not limited to that of FIG. 6, and one, two, three, four, and three.
The combination of the book and the three books is arbitrary. The holes (or the widths of the grids and the slits) of the perforated plates (or the grid-shaped / slit-shaped plates) 14 and 20 have a size that does not allow the non-oxidizing gas to sufficiently pass through the granular or lumpy raw material. There is a need to.

Further, the pusher of the upper feeding portion is not necessarily limited to that shown in FIG. 6, and for example, as shown in FIG. 7, a rectangular flat plate perpendicular to the perforated plate having a length similar to the width of the opening 29 is used. It is preferable that the two pushers 18 are attached, and the pushers 18 are alternately moved on the surface of the perforated plate 14 to the left and right to drop and move the granular or lumpy raw material into the openings 29, 29 ′. . The configuration and operation of the lower feed unit 19 in FIG. 4 is the same as that of the upper feed unit 17. Further, the shape of the upper portion 11a of the tubular body in the present invention is not necessarily limited to that shown in the drawings,
For example, the shape may be such that the cross-sectional area increases downward as shown in FIG. This is the same for the lower part of the tubular body, which is not shown.

Although FIG. 4 shows a symmetrical type device which alternately operates pushers, the present invention is not necessarily limited to this.
It may be asymmetrical. FIG. 9 shows an embodiment for reducing the number of pushers by half as applied to a small device. FIG. 9 shows a device having a rectangular cross section, in which at least one of the four side surfaces is inclined with respect to the vertical line to increase the cross-sectional area downward. In this case, the perforated plate 14 does not necessarily have to be horizontal, and may be inclined at a certain angle.

[Example of continuous horizontal moving layer system] A substantially horizontal horizontal tubular member has a non-uniform shape such as a fragment of a body of a household electric appliance such as a refrigerator or a broken piece of a building material such as an aluminum sash or a shutter. Moreover, it is suitable for treating a metal waste that is flat and is difficult to flow non-oxidizing gas into the layer on average. As an example of the internal structure of the substantially horizontal horizontal tubular body, there is a structure in which it is divided into two spaces by a partition plate having an axis and an inclination of 0.5 to 15 degrees. Metal waste is put into one end of one space of the tubular body, and the metal waste is moved to the other end by the rotation of the tubular body and the action of the partition plate. A high temperature non-oxidizing gas is fed from the gas feed pipe installed at the other end into the rolling metal waste layer at the other end to flow therethrough to heat it. The metal waste which has been heated to a high temperature and has undergone dry distillation gasification is transferred to the other space through the opening provided in the partition plate at the other end of the horizontal tubular body. A gas inlet pipe is also installed at the other end of the other space to feed the high temperature non-oxidizing gas into the rolling metal waste layer, flow through it and heat it to complete the dry distillation gasification of organic matter. To do.

The metal waste heated to a high temperature at the other end of the other space is transferred from the other end to the one end by the action of the cylindrical body rolling and the partition plate, and passes through the solid discharge port to the outside of the apparatus. Is discharged to. At this time, the partition plate serves as a heat transfer surface for heat exchange, and achieves countercurrent heat energy exchange between the high temperature metal waste and the low temperature raw material metal waste. That is, since the thermal energy of the high temperature metal waste is used for preheating for drying and carbonization gasification of the raw metal waste, the thermal energy consumption per unit weight of the metal waste can be made extremely small. it can.

The temperature of the fed non-oxidizing gas is lowered by heating, and it contains steam generated by drying and carbonization of the metal waste as a raw material, and combustible gas / combustible vapor.
The non-oxidizing gas flows countercurrently to the metal waste as a raw material in one space to give a part of the heat energy held by the metal waste as a raw material, and then is discharged to the outside of the apparatus through a gas outlet. It A part of the non-oxidizing gas discharged to the outside of the apparatus is fed into a known combustion furnace and used to generate high-temperature non-oxidizing gas. The rest is mixed with the above hot non-oxidizing gas,
As a non-oxidizing gas in the dry distillation area, the gas is introduced into and passed through the metal waste rolling bed through a gas inlet pipe installed at the other end of the cylindrical body.

Specific embodiments of the present apparatus will be described below with reference to the drawings. In FIG. 10, reference numeral 31 is an axis line that is substantially parallel to the horizontal plane or is inclined at a small angle α. Reference numeral 32 denotes a horizontal tubular body, which is rotatably supported by a bearing 33 by a ring-shaped flange 32A attached to the horizontal tubular body. The tubular body 32 is rotationally driven around the axis 31 by a driving unit (not shown). At this time, the cross section of the tubular body at right angles to the axis can take any shape such as a circle, an ellipse, or a polygon, and the area of the cross section may change in the axial direction. Further, the bearing 33 is not necessarily limited to that shown in FIG. 10, and any type, size and number of bearings can be used as long as they can rotatably support the tubular body. An opening 34 is provided at one end (left end in the figure) of the tubular body 32, and is connected to the raw material supply unit 36 by a known rotary seal mechanism 35. In the figure, 37 is the central axis of the spiral plate 38, which coincides with the axis 31 of the tubular body 32, and rotates with the rotation of the tubular body 32. The metal waste, which is a raw material, is weighed from the hopper 39 shown in FIG. 10 by the action of the known supply mechanism 40, and then, is fed into the service hopper 41 provided at one end of the raw material supply unit, and is the same as the tubular body 32. By the action of the spiral plate 38 that rotates in this manner, the spiral plate 38 is transferred to one end of the tubular body 32 through the opening 34.

A partition plate 42 is provided which extends along the axis 31 of the tubular body 32 and extends substantially over the diameter of the tubular body.
The tubular body is divided into two spaces, one of which is a solid temperature raising unit 43,
The other is the solid temperature lowering section 44. The partition plate 42 is installed so as to be inclined with respect to the axis 31 at an angle α in the range of 0.5 to 15 degrees. When the tubular body 32 is rotated clockwise at the left end, the solids on the inclined partition plate in FIG. 10 move to the right end with rotation.

As shown in FIG. 10, the partition plate 42 extending in the tubular body 32 has an opening 45 at the other end (right end in the figure) of the tubular body 32, and is rotated by the rotation of the tubular body 32. The solid that has moved from one end of the temperature rising zone 43 to the other end moves to the temperature lowering section 44 through the opening 45 and is rotated from the other end (the right end in FIG. 13) of the tubular body 32 by the rotation of the tubular body 32. 32
To one end (left end in FIG. 10) of the. In addition, the tubular body 3
An opening 46 is provided at one end on the temperature lowering section 44 side, and the solid that has moved to one end of the temperature lowering section 44 is discharged to the outside of the apparatus from the solid discharge port 47 through the opening 46.

FIG. 11 shows a cross section (cross section II ') perpendicular to the axis of the cylindrical body 32 in FIG. 10, in which the metal waste as a raw material is rotated by the spiral plate 38 as the cylindrical body 32 rotates. It is fed into the temperature raising unit 43 in the tubular body 32. Further, the solid that has moved to the one end of the tubular body 32 in the temperature dropping section 44 of the tubular body is heated by the partition wall 48.
3 is introduced into an opening 46 (FIG. 10) which is different from the solid fed in. FIG. 12 is a sectional view taken along the line II-II ′ in FIG. 10, that is, a sectional view substantially at the center of the partition plate 42 in the tubular body 32, which is perpendicular to the axis of the tubular body 32. The partition plate 42 in FIG. 12 is a flat plate, but is not necessarily limited to this, and a corrugated plate as shown in FIG.
It may be a saw-tooth shape like the above, or a perforated plate as shown in FIG.

In FIG. 10, 49 and 49 'are gas inlet pipes, preferably a plurality of which are arranged along the inner surface of the tubular body 32 at the other end of the tubular body 32. The non-oxidizing gas in the dry distillation area is switched from the gas inlet 50 to the switching valves 51 and 5
Gas distribution pipes 53, 53 'through 1'and the rotary seal 52
And gas inlet pipes 49, 4 through the gas distribution pipes 54, 54 '.
9 ', and is ejected from the nozzle holes 55, 55' into the space in the other end of the tubular body 32.

FIG. 14 is a sectional view taken along the line III-III 'in FIG. 10, in which the non-oxidizing gas is distributed to the distribution pipes 53, 53' and 5 '.
The gas is fed into the gas feed pipes 49, 49 'through 4, 54'. A plurality of gas inlet pipes are attached to the gas distribution rings 56, 56 ', but the gas distribution rings 56, 56' are separated by the partition wall 5.
Separated by 7, 57 '. FIG. 14 shows an example in which the gas inlet pipes 49 and 49 ′ are set apart from the inner surface of the tubular body 32, but the present invention is not necessarily limited to this, and the gas inlet pipe is the other end of the tubular body 32. It may be arranged so as to come into contact with the inner surface of the tubular body 32 at a portion. Also, the nozzle holes 55, 5 provided in the gas inlet pipes 49, 49 '.
As shown in FIG. 15, 5'is arranged so as to be directed to the inner surface of the cylindrical body, but is not necessarily limited to this, and has a plurality of angles toward the inner surface as shown in FIG. 15 ( It may be the nozzle 55a) or, conversely, the nozzle (nozzle 55b) provided toward the central axis.

Gas inlet pipe 4 shown in FIGS. 10 and 14.
When the tubular body 32 with 9, 49 'installed rotates,
At the other end of the tubular body 32, a solid rolling layer is formed. On the other hand, since the gas inlet pipe is exposed from the rolling layer to the upper space by the rotation of the tubular body 32, the valve 5 in FIG.
By alternately opening and closing 1, 51 ', the non-oxidizing gas is fed into the gas feed pipe existing in the rolling layer. The non-oxidizing gas in the dry distillation area is fed into the rolling layer of metal waste through the gas feed pipe,
After it is heated while flowing through it, it flows out into the space above the rolling layer. Although the above outflow gas has a high temperature,
In the tubular body 32 of 0, the solid temperature raising portion 43 is connected to the tubular body 32.
10 in the direction of one end, that is, a countercurrent flow with the low temperature metal waste as a raw material, and gives thermal energy to this to lower the temperature of the metal waste gas, which is installed at one end of the tubular body in FIG. It is discharged to the outside of the device through the outlet 58.

The metal waste which has been heated at the other end of the tubular body 32 in FIG. 10 by the flow-through of the high temperature non-oxidizing gas and has completed the carbonization is operated by the inclined partition plate 42 of the tubular body 32 to lower the temperature. While moving in the direction of one end, that is, the metal waste as a low temperature raw material and countercurrent, it gives thermal energy and achieves its drying and preheating, the temperature lowers and the solid discharge port continues to the opening 46. It is discharged from the device 47. The gas generated in the temperature lowering zone in the tubular body 32 of FIG.
The non-oxidizing gas flowing into the temperature raising unit 43 merges with the opening 45 provided at the other end of the inclined partition plate 42. The low temperature non-oxidizing gas discharged to the outside of the apparatus is mixed with a high temperature non-oxidizing gas generated by a known method to obtain a temperature of 400 to 700.
The gas at a temperature of ° C is introduced into the cylindrical body through the introduction pipes 49 and 49 '.

FIG. 10 and FIG. 14 show examples of gas inlet pipes for efficiently heating the high temperature non-oxidizing gas through the solid rolling bed to heat it. Does not necessarily have to divide the hot non-oxidizing gas into two streams, the partition walls 57 and 57 'of FIG. 14 can be removed and the gas distribution pipes 53 and 53' can be made the same pipe. The valves 51 and 51 'for dividing flow in FIG. 10 are not limited to those shown in the drawing, and the rotation of the tubular body 32 selectively causes the gas to flow through the gas inlet pipe existing in the rolling layer. The shape is not limited as long as it has a configuration. Also,
Although FIG. 10 and FIG. 14 show the case where the gas inlet pipe is divided into two, the present invention is not necessarily limited to this, and the structure may be divided into three or four or more.

[Example of Batch System] FIG. 16 shows an example of a batch system. Note that FIG. 16 shows an example in which three heat treatment devices are arranged (treatment tanks 62a, 62b, and 62c), because this is advantageous in terms of efficiency of the entire process and energy saving, as will be described later. It is not limited to. In addition, the metal waste that is the raw material is used for relatively large shapes such as used microwave ovens, rolled steel materials such as refrigerators, aluminum sashes, scrap materials of building materials such as doors, shutters, but not limited to this. Instead, the beverage can can be pressed, the can is crushed into chips, or steel such as copper to which organic substances are adhered and mixed, or metal waste other than aluminum.

In the equipment shown in FIG. 16, drying (preheating), carbonization, and cooling (heat radiation) are independently performed in three processing tanks, but various atmospheric gas piping examples used for this purpose are devised as shown in the drawing. is doing. That is, in each processing tank, the low temperature (high humidity) gas obtained in the drying step and used in the cooling step and the high temperature (drying) gas obtained in the cooling step and used in the drying step are different from each other in each processing tank. The high temperature non-oxidizing gas used in the dry distillation process can be supplied to each treatment tank, and the combustible gas obtained in the dry distillation process can be discharged from each treatment tank. Needed.

Therefore, the low temperature gas pipes 68a, 68
b and 68c are the switch 66 and the processing tanks 62a, 62b and 6
2c is arranged so as to communicate with each other, and each pipe 68a, 68
b and 68c are open / close valves 69a, 69b and 69 for low temperature gas.
c is provided, and pipes 70a, 70 for high temperature gas are provided.
b, 70c are arranged so that the processing tanks 62a, 62b, 62c can communicate with each other, and the pipes 70a, 70b, 70c are connected.
Is provided with high-temperature gas on-off valves 71a, 71b, 71c, and high-temperature non-oxidizing gas pipes 72a, 72b, 7
2c is a processing tank 62a, 62b,
62c is arranged so as to communicate with 62c, and the shunt 65 is an LP.
It is connected to a fossil fuel such as G or A heavy oil, air 63, and a burner combustor 64 that combusts a combustible gas, which will be described later, and each pipe 72a, 72b, 72c has a hot gas on-off valve 73.
a, 73b, 73c are provided. Further, the combustible gas pipes 74a, 74b, 74c are connected to the burner combustion section 6
4 and the processing tanks 62a, 62b, and 62c are connected to each other, and combustible gas opening / closing valves 75a, 75b, and 75c are provided in the pipes 74a, 74b, and 74c, respectively. Reference numeral 67 indicates an apparatus for crushing, granulating, pressure shaping or melting for recovering the metal material.

At the start of operation, a certain amount of metal waste 61 (hereinafter, simply referred to as waste) is charged into the first to third processing tanks 62a, 62b and 62c, but aluminum cans or When a waste containing water remaining in a steel can or the like is charged as a raw material, it is first necessary to evaporate and dry the residual water in these treatment tanks. When the raw material has no residual water content, the preheating step before dry distillation is performed. This drying or preheating is first performed in the first treatment tank 62.
a, and the second processing tank 62b and the third processing tank 62c are sequentially processed.
However, since the atmospheric gas obtained in another processing tank cannot be used at the time of start-up, a high temperature gas of a predetermined temperature is supplied separately through the pipe 70a and the opening / closing valve 71a. When the amount of heat is insufficient during this drying, high temperature non-oxidizing gas may be mixed through the pipe 72a.

After the completion of drying (preheating), fossil fuel such as LPG or A heavy oil and the air 63 are burned in the burner combustion section 64.
The high-temperature non-oxidizing gas obtained by burning the fuel is introduced into the first treatment tank 62a through the flow divider 65 and the pipe 72a and the opening / closing valve 73a is opened. Carbonize. The combustible gas obtained by the carbonization is returned to the burner combustion section 64 through the pipe 74a and is used for combustion together with air. This burner combustion section 6
By burning in the vicinity of the theoretical air ratio in 4, the optimum high temperature non-oxidizing gas can be obtained. At the beginning of operation,
Fossil fuel is required, but once combustible gas is obtained by carbonization, combustion can be continued by circulation, and fossil fuel consumption is 1/10 or less of the combustion method (conventional method). Then, after the dry distillation is completed, the high temperature waste from which the organic matter on the surface has been almost completely removed is pipe 68a and the on-off valve 6
The low temperature gas is introduced into the first treatment tank 62a through 9a and directly contacted with it to radiate heat. Waste that has finished radiating heat and has dropped to a desired temperature is charged into the crushing granulator 67, and becomes a granular metal material.

The start of drying in the second processing tank 62b is the first
It is the time when the carbonization in the treatment tank 62a is started, and is performed by feeding the high temperature gas through the pipe 70b and the opening / closing valve 71b.
The high temperature non-oxidizing gas is fed into the second treatment tank 62b through the valve b and the opening / closing valve 73b, whereby dry distillation is performed by the pipe 68.
b, cooling is performed by feeding a low temperature gas through the on-off valve 69b. Further, the start of the drying in the third treatment tank 62c is the time when the dry distillation in the second treatment tank 62b is started, and here again, the drying is performed by the high temperature gas fed through the pipe 70c and the opening / closing valve 71c. And dry distillation is performed by the high temperature non-oxidizing gas sent through the open / close valve 73c, and cooling is performed by the low temperature gas sent through the pipe 68c and the open / close valve 69c. At the time when the cooling in the third treatment tank 62c is started, the next waste feeding and drying are started in the first treatment tank 62a. When the cooling process in the third processing tank 62c starts, gas circulation between the three processing tanks becomes possible, and the steady-state operation starts.

The steady-state operation will be described with reference to the schematic diagrams of FIGS. In FIG. 17, the first treatment tank I is a drying step, the second
The processing tank II is in the dry distillation step, and the third processing tank III is in the cooling step. The high temperature gas (D) obtained by the heat exchange between the low temperature gas and the high temperature object in the cooling process of the third treatment tank III is supplied to the first treatment tank I, and if necessary burns. The high temperature non-oxidizing gas (H) sent from the part G is sent. Further, the high temperature non-oxidizing gas (H) sent from the combustion section G is sent to the second treatment tank II, and the combustible gas (C) generated by the thermal decomposition of the organic matter adhering to the waste is generated in the combustion section. Sent to G. Furthermore, the third treatment tank III
The low-temperature gas (W) is fed to the tank, and the low-temperature gas (W) is obtained by the high-temperature gas in the first treatment tank I coming into direct contact with the waste material and removing the water content thereof. The right side of the figure shows the open / close status of each valve and each line in each layer and the temperature change of waste and gas.

FIG. 18 shows a situation in which the first treatment tank I is in the dry distillation step, the second treatment tank II is in the cooling step, and the third treatment tank III is in the drying step. Combustion part G to the first treatment tank I
The high temperature gas (H) sent from is sent, and the combustible gas (C) is sent to the combustion part G. Further, the low temperature gas (W) is fed to the second treatment tank II. Furthermore, the third treatment tank
The high temperature gas (D) obtained in the cooling process in the second treatment tank II is supplied to III, and the high temperature non-oxidizing gas (H) sent from the combustion section G is supplied as necessary. Also, the third processing tank
The low temperature gas (W) obtained in III is supplied to the second treatment tank II.

FIG. 19 shows a situation in which the first treatment tank I is in the cooling step, the second treatment tank II is in the drying step, and the third treatment tank III is in the dry distillation step. The low temperature gas (W) obtained in the drying step of the second treatment tank II is supplied to the first treatment tank I,
The high temperature gas (D) obtained in the heat dissipation step in the first treatment tank I is supplied to the second treatment tank II, and the high temperature non-oxidizing gas (H) sent from the combustion section G is fed if necessary. It High-temperature inert gas (H) sent from the combustion section G to the third treatment tank III
Is sent, and the combustible gas (C) is sent to the combustion section G.

FIG. 20 shows a drying / dry distillation / cooling cycle in three processing tanks. In FIG. 20, three processing tanks A, B, and C are arranged in the horizontal direction, and the first stage (0 to 5 minutes), the second stage (5 minutes to 10 minutes), and the third processing tank for each processing tank are arranged in the vertical direction. The schematic diagram which took time progress of the stage (10 minutes-15 minutes) is shown. Note that the solid lines in the processing tanks A, B, and C in FIG. 20 represent the temperature state of the raw material.
In the stage, A indicates a drying temperature state, B indicates a dry distillation temperature state, and C indicates a cooling temperature state. As shown in the figure, it can be seen that the three processing tanks are in the same state as the immediately preceding processing tank with a shift of 5 minutes. Therefore, the same treatment tank receives the raw material at intervals of 15 minutes and discharges the dry-distilled cooling can. In other words, three identical treatment tanks are installed side by side, and various gases introduced into the treatment tank with these treatment tanks fixed are continuously switched according to a predetermined algorithm to dry / dry-distill and cool the raw materials. It becomes possible to do.
As a result, operability is improved, and significant energy saving and compactness of the device can be achieved. In the above-described example of the present invention, the three-tank type processing apparatus has been described.
Even in a processing apparatus of a type larger than a tank, the intended purpose can be achieved by switching various gases according to a predetermined algorithm. In addition, as a method of charging the raw materials and discharging the product, there are a method of inserting from the top of the apparatus and a method of extracting from the bottom, and a method of putting the object in and out from the side of the apparatus. In this method, the waste itself is allowed to stand (fix) in the treatment tank and only the internal gas is switched to operate, so no mechanism or power source to move the waste is required, and the facility Great advantage.

[All steps of the apparatus for recovering granular steel and aluminum from a steel can press using the present invention] In the above description, the purpose of the present invention is to dry-distill an organic substance from a metal waste to which an organic substance is attached and mixed. Although the method and the apparatus for removing by the above have been described, an example of the whole production process using the present invention will be shown below.

FIG. 21 shows all steps of a production process for recovering granular and high-grade steel and aluminum as products from a steel can press as a raw material.
The raw material steel can press 81 is loaded into the crusher 83 by the supply conveyor 82, and is made into a press can in a loose shape by the impact force. This is put into the vertical cylinder drying / drying / cooling device 85,
The attached high molecular compound is decomposed into combustible gas and separated from metal. The generated combustible gas is combusted in a required amount through the flow dividing section 90 in the combustion section 88 with air having a theoretical air ratio or less. At this time, if the calorific value is insufficient, auxiliary fuel is added to generate a high temperature non-oxidizing gas. Return to 85 to accelerate dry distillation. On the other hand, the carbonized steel cans discharged from the lower part of the device 85 are carried to the granulator 87 by the moving conveyor 86, and the upper lid part (aluminum) and the body part (steel) are separated by the impact force of the high speed rotation, and at the same time aluminum Each of the steels is cut, rolled into granules and dropped through a slit at the bottom of the granulator. Since the granular steel and aluminum discharged from the granulator 87 have risen to a temperature of 200 ° C. or higher, they are passed through the heat exchanger 84 and used for preheating the loose press cans to mix cooled steel and aluminum. The pellets are separated using a magnetic separator 89 and collected as a product.

[0045]

[Example] [Example 1] (Continuous vertical moving bed system) Design example based on Fig. 4 ・ Raw material Pressed steel can 3000 kg / hr ・ Heat treatment device Vertical type with width 2 m × 1.2 m and height 8.1 m Moving bed equipment ・ Non-oxidizing gas feed temperature Middle part 618 ℃, Bottom part 200 ℃ ・ Non-oxidizing gas outlet temperature 200 ℃ ・ Raw material discharge temperature 200 ℃ ・ Fuel consumption (A heavy oil) 17kg / hr ・ Dioxins in exhaust gas 0. 01ng TEQ / Nm ³ or less

[Example 2] (Continuous horizontal moving bed system) Design example based on Fig. 10-Raw material Pressed steel can 1000 kg / hr-Heat treatment device Horizontal horizontal rotating device with internal diameter 1.5 m and length 6 m-Non-oxidizing Gas feed temperature 275 ℃ ・ Non-oxidizing gas discharge temperature 200 ℃ ・ Raw material discharge temperature 225 ℃ ・ Fuel consumption (A heavy oil) 12kg / hr ・ Dioxins in exhaust gas 0.01ng TEQ / Nm ³ or less

[0047] [Example 3] (continuous horizontal moving bed method) Figure 10 based design example, materials steel cans mass was compressed density 180 kg / m ³ · composition metal 93% inorganic 1% organic matter 1% water 5% ・ Treatment rate 3000kg / hr ・ Cylindrical body cross-sectional area 1.5m × 1.5m ・ Cylinder length 8m ・ High temperature non-oxidizing gas fed below the upper feed section 618 ℃ 1250Nm ³ / hr ・ Lower feed Low temperature non-oxidizing gas sent to the lower part of the room 200 ℃ 1122Nm ³ / hr ・ Fuel for generating high temperature non-oxidizing gas A heavy oil 38.8kg / hr ・ Exhaust gas amount 695Nm ³ / hr

Example 4 (Continuous horizontal moving bed system) Design example based on FIGS. 11 to 13: Raw material Flat metal waste with uneven length and width (containing paint, coating material and water) Composition Metal 93% Inorganic matter 1% Organic matter 1% Water 5% ・ Treatment rate 2,000kg / hr ・ Non-oxidizing atmosphere: Carbonization at 250 ℃ ・ Fuel consumption 31kg / hr ・ Sending non-oxidizing gas 2250Nm ³ / hr 280 ℃ ・Exhaust metal temperature 300 ° C Exhaust gas temperature 300 ° C ・ Device inner diameter 2m Length 6m ・ Inclined partition plate Inclination angle 5 ° Rotation speed 3r.pm

[Comparison with conventional combustion method] Steel can 3
Table 1 below shows a comparison between the results obtained by the present invention and the results obtained by the conventional oxidative combustion method when 000 kg / hr is used as the raw material. As can be seen, the energy consumption was 23% of the conventional one, and significant energy saving was achieved, and the oxidation loss of aluminum was almost zero. As a result, the amount of aluminum recovered increased by 18% and the amount of residual disposal Has decreased to 31%.

[0050]

[Table 1]

[0051]

The effects obtained by the metal recovery method and apparatus according to the present invention described above are as follows. 1. The chemical loss (oxidation loss) of metal is close to zero and the yield is extremely high. In the combustion method that decomposes and removes organic matter in an oxidizing atmosphere and the dry distillation method that decomposes and removes organic matter in a weakly oxidizing atmosphere, some of the metal is lost as an oxide, but this method is a high temperature non-oxidizing gas that does not contain oxygen at all. Is generated and used as an atmospheric gas for dry distillation, no loss due to metal oxidation occurs. 2. Thorough effective use of heat is achieved and energy efficiency is extremely high. Specifically, it is as follows. (1) Combustion of carbonized gas (combustible gas) obtained by carbonization of organic compounds adhering to and mixed with metal waste, and directly contacting the combustion gas (high temperature non-oxidizing gas) with metal waste It is transferring heat. (2) Sensible heat of dry-distilled metal material and dry-distilled gas is used for preheating and drying of raw metal waste. (3) Compared with the combustion method, the amount of gas is small, and the sensible heat taken out of the exhaust gas is small. (4) Heat loss is suppressed by downsizing the device. 3. Generation of dioxin is greatly suppressed. Even if chlorine is contained in the adhering and mixed organic matter, it is thermally decomposed in a non-oxidizing atmosphere, so that generation of dioxins can be almost eliminated.

[Brief description of drawings]

1 (a), (b) and (c) are process drawings for explaining the principle of various embodiments of the method of the present invention.

2 (a), (b), and (c) are process diagrams of a composite or connection type of the embodiment shown in FIG.

FIG. 3 is a flow sheet showing an embodiment of the present invention which is a continuous processing type and uses a vertical rotary movement system.

FIG. 4 is a schematic view showing a specific example of a vertical moving layer for actually carrying out the example of the present invention in FIG.

5 is a sectional view taken along the line I-I 'of FIG. 4, showing various sectional shapes of the tubular body.

FIG. 6 is a sectional view taken along the line II-II ′ of FIG. 4, showing a specific example of the perforated plate and the pusher.

FIG. 7 shows another example of FIG.

FIG. 8 is a schematic view showing another example of the upper shape of the tubular body in FIG.

FIG. 9 is a schematic view showing another specific example of FIG. 4, showing an asymmetric type.

FIG. 10 is a structural schematic diagram showing an embodiment when the present invention is applied to a continuous horizontal moving layer system.

11 is a cross-sectional view taken along the line II ′ of FIG.

12 is a sectional view taken along the line II-II ′ of FIG.

13A and 13B show another example of the cross section of FIG. 12, where FIG. 13A is a corrugated shape, FIG. 13B is a sawtooth shape, and FIG. 13C is a porous shape.

14 is a cross-sectional view taken along the line III-III ′ of FIG.

15 is a partial detailed view of FIG. 14. FIG.

FIG. 16 is a flow sheet showing an example embodiment of the invention of batch processing type.

FIG. 17 is a schematic diagram showing a first stage of an actual metal recovery operation in FIG. 16.

FIG. 18 is a schematic diagram showing a second stage following FIG. 17.

FIG. 19 is a schematic diagram showing a third stage following FIG. 18.

FIG. 20 is an explanatory diagram showing a drying / dry distillation / cooling cycle in an example in which three processing tanks are installed.

FIG. 21 is a schematic diagram showing all steps of the process of the present invention when a steel can press is used as a raw material.

[Explanation of symbols]

[Fig. 3] 1: High-temperature non-oxidizing gas generator 2: Pyrolysis gasifier 3: Gas mixer 4a-4c: Flow divider 5: Drying zone 6: Dry distillation zone 7: Cooling zone 1a: Combustion air or oxygen G ₁ : High-temperature non-oxidizing gas f: Fuel G ₂ : Low-temperature non-oxidizing gas g ₁ : Non-oxidizing gas containing dry distillation gas g ₂ : Non-oxidizing gas with elevated temperature W: Metal waste W ₂ : Dry distillation waste P: Cooling Used waste [FIGS. 4 to 9] 11: tubular body 12: raw material inlet 11a: upper portion of tubular body 11b: raw material hopper 11c: connecting portion (combined tower portion) 11d: lower portion of tubular body 13: raw material discharge Outlet 14, 20: Perforated plate 15, 21: Space portion 16, 16 ': Packed layer (lamination) 17: Upper stage feed portion 18, 18'2
2, 22 ': Pusher 19: Lower feeding part 23: Discharging mechanism 24, 26: Space below porous plate 25: Gas inlet (non-oxidizing gas in dry distillation area) 27: Gas inlet (non-oxidizing gas in dry area) 28 : Gas discharge port (dry area non-oxidizing gas) 29: Opening [Figs. 10 to 15] 31: Axis 32: Horizontal rotary tubular body 32A: Flange 33: Bearing 34: Opening 35: Rotating seal mechanism 36: Raw material Supply unit 37: Central shaft 38: Spiral plate 39: Hopper 40: Supply mechanism 41: Service hopper 42: Partition plate 43: Solid temperature raising unit 44: Solid temperature lowering unit 45: Opening unit 46: Opening unit 47: Solid discharge port 48: Partition wall 49, 49 ': Gas inlet pipe 50: Gas inlet port 51, 51': Switching valve 52: Rotating seal 53, 53 ': Gas distribution pipe 54, 54': Gas distribution pipe 55: Nozzle holes 56, 56 ′: Gas distribution ring 57, 57 ′: Partition 58: Gas outlet [FIG. 16] 61: Metal waste 62 a-c: Treatment tank 63: Air 64: Burner combustion part 65: Flow divider 66: Switching device 67: Crushing , Granulation, pressure shaping or melting device 68a-c: pipe 69a-c: low temperature gas on-off valve 70a-c: high temperature gas pipe 71a-c: high temperature gas on-off valve 72a-c: high temperature gas pipe 73a -C: Open / close valve for high temperature gas 74a-c: Pipe for combustible gas 75a-c: Combustible gas open / close valve [Fig. 21] 81: Steel can press 82: Supply conveyor 83: Crusher 84: Heat exchanger 85: Drying・ Dry distillation / cooling device 86: moving conveyor 87: granulator 88: combustion device 89: magnetic separator 90: flow divider

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F23G 5/027 F23G 7/00 D 4K056 5/16 F27B 1/02 4K061 7/00 7/04 F27B 1 / 02 F27D 17/00 101G 7/04 B09B 5/00 ZABC F27D 17/00 101 3/00 303A (71) Applicant 591250189 Regular Masayoshi 2-31-24 Konanji Minami, Suginami-ku, Tokyo (72) Inventor Hatta Shodo 6-37-2-802 Minami-Senju, Arakawa-ku, Tokyo (72) Tatsuji Jizaki 1-21-25-701 Namiki, Kawaguchi City, Saitama Prefecture (72) Inventor Daizo Kunii 1-25-16 Nakamachi, Meguro-ku, Tokyo (72) Inventor Masakata Masayoshi 2-31-24F term, Koenji Minami, Suginami-ku, Tokyo 3K061 AA24 AB02 AC20 BA01 CA07 FA21 FA23 3K078 AA01 BA08 BA26 CA02 CA06 CA11 4D004 AA01 AA21 AA22 AA27 AB10 BA05 CA12 CA22 CA24 CA28 CA32 CA42 CB02 CB09 CB44 DA02 DA06 4K001 AA02 AA09 AA10 BA22 CA49 4K045 AA01 BA01 BA10 GB13 GB20 LA02 4K056 AA09 BA01 BA06 CA20 DA02 DA33 DA36 4K061 AA07 BA12 CA27 DA07 HA03 HA09

Claims (13)

[Claims] 1. A metal waste (hereinafter referred to as “metal waste”) to which organic matter is adhered and mixed is thermally decomposed in a high-temperature oxygen-free gas (hereinafter referred to as “non-oxidizing gas”) atmosphere to produce metal waste. When regenerating a metal in which organic substances are separated (hereinafter referred to as “metal material”), (1) Combustion of a fluid fuel with a theoretical amount of air or oxygen to generate a non-oxidizing gas, which is used in the next step Feeding process (non-oxidizing gas generation process), (2) In the non-oxidizing gas atmosphere sent from the previous process, organic substances in metal waste are pyrolyzed to generate flammable pyrolysis gas, and organic substances and metals are separated. To recover the metallic material (pyrolysis step), (3) Combustible pyrolysis gas generated in the pyrolysis step is completely combusted with a theoretical amount of air or oxygen to generate combustion exhaust gas (complete Combustion process) A method for recovering a metal material from a metal waste to which organic matter is adhered and mixed, which is characterized in that 2. The method for recovering a metal material according to claim 1, wherein the pyrolysis gas generated in the pyrolysis step is circulated and used as a part or all of the fluid fuel in the non-oxidizing gas generation step. 3. The non-oxidizing gas is generated by circulating a part of the combustion exhaust gas generated in the complete combustion step to the non-oxidizing gas generating step and blowing this into the fluid fuel to generate the non-oxidizing gas. The method for recovering a metal material described. 4. The thermal decomposition step is a step combined with and combined with either or both of the other complete combustion step and the non-oxidizing gas generating step. The method for recovering a metal material described. 5. In the thermal decomposition step, the metal waste is passed through a preheating / drying zone to reach a dry distillation gasification zone of organic matter, and then sent to a cooling zone for cooling by heat radiation to obtain a desired metal material. At this time, high temperature non-oxidizing gas is forcedly contacted with the metal waste in the dry distillation area to promote dry distillation, and the non-oxidizing gas containing the generated pyrolyzable combustible gas is brought into direct or indirect contact with the metal waste in the preheating dry area. It promotes preheating and drying of the metal waste, while transferring the sensible heat of the metal material to the solid-solid heat transfer between the metal waste and the metal material through the partition wall as well as the metal waste and the non-oxidizing gas. The metal material recovery according to any one of claims 1 to 4, wherein the temperature change from the preheating / drying zone to the cooling zone is realized by recovering by heat transfer between solid and gas between the two. Method. 6. A high temperature non-oxidizing gas is discharged continuously or intermittently from the bottom of a granular or massive metal waste packed in a substantially vertical cylindrical body to form a laminated structure, and laminated. The upper part of the stack is a dry zone and the gas inlet part is a dry distillation zone by feeding into the metal waste stack from the bottom or intermediate level and contacting the metal waste in countercurrent. Item 6. A method for recovering a metal material according to any one of items 1 to 5. 7. Cooling the metal material by feeding a low temperature non-oxidizing gas from the bottom of the stack of metal materials heated to a desired temperature to bring the non-oxidizing gas into countercurrent contact in the layer for heat exchange. The method for recovering a metal material from a metal waste according to claim 6, which is characterized in that. 8. A rotating cylindrical body in which a high-temperature non-oxidizing gas is fed from one end or the other end of a horizontal rotating cylindrical body which is rotatable around an axis line to dry-distill and gasify organic matter to discharge it as a pyrolyzable combustible gas. The metal material recovery method from metal waste according to any one of claims 1 to 6, wherein the metal material is discharged from one end or the other end. 9. A metal material recovery device for feeding granular or lumpy metal waste from above a vertical cylindrical body to fill the inside thereof and discharge it from the bottom of the cylindrical body, in the middle and bottom of the cylindrical body. A horizontal or inclined perforated plate is installed, and granular or lumpy metal waste is moved to the lower side of the tubular body by the action of gravity through the perforated plate, and the dry distillation area is placed below the intermediate perforated plate.
Further, a non-oxidizing gas in the temperature range of a dry region is fed into the lower part of the bottom porous plate to flow through the granular or massive metal waste layered on the porous plate. 10. A cylindrical body that rotates about an axis that is substantially parallel to the horizontal plane or that is inclined at a small angle, and has a diameter of 0.5 to 0.5 with respect to the axis of the cylindrical body. The inside of the tubular body is divided into two spaces along the axis by a partition plate that is inclined at an angle within the range of 15 degrees, and metal waste is removed from the space through an opening provided at one end of the tubular body. It is fed into one and moved by the rotation of the tubular body and the action of the inclined partition plate toward the other end of the tubular body, and is provided on the inclined partition plate near the other end of the tubular body. The metal waste is moved to another space through the opening, and is moved toward one end of the tubular body by the rotation of the tubular body and the action of the inclined partition plate, and the opening provided at one end of the tubular body. Recovery of horizontal metal materials from metal waste that has adhered and mixed with organic substances, characterized by discharging metal materials through apparatus. 11. A gas inlet pipe is provided along the inner surface of the tubular body at the other end of the tubular body to feed a high temperature non-oxidizing gas from outside the apparatus, or to feed air at a theoretical amount or less. 11. The metal material recovery apparatus according to claim 10, wherein a high temperature non-oxidizing gas is generated in the apparatus and the gas is brought into contact with the metal waste rolling in the cylindrical body. 12. A predetermined amount of metal waste is charged, and the metal is dried,
A plurality of rectangular or cylindrical containers that can be discharged as a metal material after dry distillation and cooling are installed side by side, and metal waste is put into these containers, and the containers are fixed and high temperature non-oxidizing in the containers. Gas or weak oxidizing gas is continuously switched according to a predetermined algorithm to be introduced / discharged to dry, dry-distill and cool metal waste. Metal material from adhering and mixing organic waste. Recovery device. 13. A certain amount of metal waste is charged and dried,
Put the metal waste in a rectangular or cylindrical container that can be discharged as a metal material after dry distillation and cooling,
An apparatus for recovering a metal material from a metal waste adhering and mixed with an organic matter, characterized in that the container is sequentially moved according to a predetermined algorithm to dry, dry-distill and cool the metal waste.