WO2014174736A1 - 物質の選別装置、選別方法 - Google Patents
物質の選別装置、選別方法 Download PDFInfo
- Publication number
- WO2014174736A1 WO2014174736A1 PCT/JP2014/000339 JP2014000339W WO2014174736A1 WO 2014174736 A1 WO2014174736 A1 WO 2014174736A1 JP 2014000339 W JP2014000339 W JP 2014000339W WO 2014174736 A1 WO2014174736 A1 WO 2014174736A1
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- WIPO (PCT)
- Prior art keywords
- conveyor
- sorting
- material type
- airflow
- blower
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air
- B07C5/365—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C2501/00—Sorting according to a characteristic or feature of the articles or material to be sorted
- B07C2501/0054—Sorting of waste or refuse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0203—Separating plastics from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0234—Mechanical separating techniques; devices therefor using gravity, e.g. separating by weight differences in a wind sifter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention relates to a sorting technique for sorting a small piece made of a specific material type from a sorting target in which a plurality of small pieces are collected, and in particular, a small piece of a specific resin type from a sorting target obtained by crushing used home appliances and the like.
- the present invention relates to sorting technology for sorting.
- PP polypropylene
- ABS acrylonitrile butadiene styrene
- Patent Document 1 proposes a sorting method that takes into account the above-mentioned problems related to the recycling of resin materials.
- Patent Document 1 identifies the material to be sorted flowing on the conveyor, identifies the material type for each small piece with an identification device, and discharges the identified specific material type resin from the conveyor end of the conveyor.
- This is a technique for separating from the flight path to be selected.
- air is discharged from nozzles arranged above or below the flight path in a pulsed manner, and only small pieces of a specific material type are blown away to separate from the selection target. It also has an air supply device that uses a gas source for transporting materials.
- FIGS. 10a to 10c and FIG. 11 show an embodiment of a conventional sorting method for sorting objects.
- FIGS. 10a to 10c are side views of a process of selecting small pieces 2A of a desired specific material type from the small pieces 2A, 2B, 2C, and 2D conveyed by the conveyor 1, and
- FIG. 11 is a plan view.
- FIG. 10a shows small pieces 2A, 2B, 2C, and 2D as sorting objects conveyed by the conveyor 1, and the small piece 2A is a desired specific material type.
- the device indicated by reference numeral 3 in the figure is an identification device.
- a portion indicated by reference numeral 4 in the drawing is a conveyance end of the conveyor 1 from which the small pieces 2A, 2B, 2C, and 2D are discharged.
- the member indicated by reference numeral 5 in the figure is provided in the width direction of the conveyor 1 in order to separate the small pieces 2A of a specific material type from the flight paths of the small pieces 2A, 2B, 2C, and 2D discharged from the conveying end 4. It is a nozzle group.
- the member indicated by reference numeral 8 in the drawing is a sorting plate for separating the small pieces 2A of the specific material type separated from the flight paths of the small pieces 2A, 2B, 2C, and 2D.
- 10a is a side view
- FIG. 11 is a plan view of the same scene as FIG. 10a.
- the selection objects 2A, 2B, 2C, and 2D pass under the identification device 3, and the material type and shape are identified.
- the small pieces 2 ⁇ / b> A, 2 ⁇ / b> B, 2 ⁇ / b> C, 2 ⁇ / b> D identified by the identification device 3 are discharged from the transport end 4 of the conveyor 1. Furthermore, when the small piece 2A, which is a desired specific material type, passes under the nozzle group 5, pulse air is discharged only from the corresponding part of the nozzle, and the desired specific is obtained from the flight path of the small pieces 2A, 2B, 2C, 2D. A small piece 2A, which is a material type, is blown off and selected.
- representative flight paths of the small pieces 2A, 2B, 2C, and 2D discharged from the conveying end 4 of the conveyor 1 are indicated by solid lines, dotted lines, and one-dot broken lines.
- two or more independent air nozzle groups are arranged along the flight path of the small pieces to be sorted. It is necessary to separate the small pieces into the material types from the flight path of the small pieces to be sorted by pulsed air.
- FIG. 12a to FIG. 12c show an embodiment of a sorting method for simultaneously sorting small pieces of two or more kinds of specific material types by one sorting process.
- the figure shows a process of selecting small pieces 2A and 2B of a desired specific material type from the small pieces 2A, 2B, 2C, and 2D, which are objects to be sorted conveyed by the conveyor 1.
- FIG. 12a shows the small pieces 2A, 2B, 2C, and 2D to be sorted that are conveyed by the conveyor 1, and the small pieces 2A and the small pieces 2B are small pieces of a desired specific material type.
- the identification device 3 and the conveying end 4 from which the small pieces 2A, 2B, 2C and 2D to be sorted are discharged are the same as described above.
- the symbols 5A and 5B in the figure are provided in the width direction of the conveyor 1 in order to separate the small pieces 2A and 2B of a specific material type from the flight paths of the small pieces 2A, 2B, 2C, and 2D discharged from the conveying end 4.
- Reference numerals 8A and 8B in the figure are sorting plates for sorting the small pieces 2A and 2B of a specific material type separated from the flight paths of the small pieces 2A, 2B, 2C, and 2D to be sorted.
- FIG. 12b shows a state in which the small pieces 2A, 2B, 2C, and 2D to be selected pass under the identification device 3 and the material type and shape are identified.
- FIG. 12c shows a state in which the small pieces 2A, 2B, 2C, and 2D that are the objects of selection identified by the identification device 3 are discharged from the transport end 4. Further, when the small pieces 2A and 2B of a desired specific material type pass under the nozzle groups 5A and 5B, air is discharged in a pulsed manner, and the flight paths of the small pieces 2A, 2B, 2C, and 2D to be selected Thus, the small pieces 2A and 2B of a desired specific material type are ejected. Representative flight paths of the small pieces 2A, 2B, 2C, and 2D that are the objects of selection discharged from the conveyance end 4 are indicated by a solid line, a dotted line, and a one-dot broken line.
- the flight paths of the small pieces 2A, 2B, 2C, and 2D that are the objects of selection discharged from the transport end 4 vary due to the difference in shape and specific gravity. Further, the variation increases as the distance from the conveyance end 4 increases.
- a material type with a low bulk density such as urethane foam
- has a high drag force so that the flight path is as indicated by the one-dot broken line in FIG.
- a sheet-like resin material having a small thickness and a large area may be lifted by lift, and the flight path may be a trajectory as shown by a dotted line in FIG. For this reason, the accuracy of sorting far away from the transport end 4 is reduced due to variations in the flight path.
- Patent Document 1 when the material is discharged from the conveyor carry-out end, transportation is smoothly performed by utilizing a transportation gas source for transporting the material in order to separate only the specific material from the falling path of the other material.
- a transportation gas source for transporting the material in order to separate only the specific material from the falling path of the other material.
- the target object of a small piece cannot be sorted with high accuracy, and the collected collected material has poor purity and cannot be used again as a recycled material. Accordingly, in order to select two or more specific material types with high accuracy at the same time by a single selection process, it is a problem to stabilize the flight trajectory of the small pieces to be selected.
- the present invention has as its main object to provide a sorting apparatus and a sorting method with high sorting efficiency and high sorting accuracy in view of the above-mentioned conventional problems.
- the sorting method is a sorting method for sorting a specific material type and another material type from a selection target in which the specific material type and other material type are mixed.
- the sorting object is transported in one direction in a state of being placed on a conveyor, the composition of the specific material type placed on the conveyor is identified by an identification device, and at the front end in the transport direction of the conveyor, An air flow having a wind speed that matches or substantially matches the conveying speed of the conveyor is generated by a blower, and the air flow is stabilized by a rectifying plate arranged along the flight path to be selected, and the identified specific material type
- the position information of the object is acquired, and pulse air is injected by an injection device when a specific material type that receives the airflow from the conveyor and flies is passed.
- the air flow generated by the blower is B (m / s) when the conveying speed of the conveyor is A (m / s) and B (m / s) is the air velocity of the air flow at the tip in the conveying direction of the conveyor. It may be an air flow such that the value of / A is within 1 ⁇ 0.15.
- the direction of the airflow may coincide with the popping-out direction of the selection target at the front end portion in the transport direction of the conveyor.
- the sorting device is a sorting device that sorts a specific material type and another material type from a selection target in which the specific material type and other material type are mixed.
- a conveyor that conveys the selection target in one direction in a loaded state, an identification device that identifies a composition of a specific material type placed on the conveyor, and positional information of the identified specific material type And a jet of jetting pulsed air at the time of passage of a specific material type flying from the conveyor, and an air flow with a wind speed that matches or substantially matches the transport speed of the conveyor at the tip in the transport direction of the conveyor And a rectifying plate arranged along the flight path to be selected.
- the said air blower is a value of B / A, when the conveyance speed of the said conveyor is set to A (m / s), and the wind speed of the said air current in the front-end
- the blower device may generate an airflow in a direction that coincides with the popping-out direction of the selection target at the front end portion in the transport direction of the conveyor.
- variation in the flight trajectory of small pieces can be reduced, sorting performance of specific material types can be greatly improved, recycling quality and productivity can be improved, and sorting items to be recycled are expanded. It becomes possible to do.
- FIG. 1a is a side view showing a sorting apparatus of the present invention.
- FIG. 1b is a side view showing the sorting apparatus of the present invention.
- FIG. 1c is a side view showing the sorting apparatus of the present invention.
- FIG. 2 is a plan view showing the sorting apparatus of the present invention.
- FIG. 3a is a diagram showing the state of airflow generation around the flight path of the present invention.
- FIG. 3b is a diagram showing the state of airflow generation around the flight path of the present invention.
- FIG. 3c is a diagram showing the state of airflow generation around the flight path of the present invention.
- FIG. 4 is a relational diagram showing the average wind speed at each point in the traveling direction of the flight trajectory when the presence or absence of the blower generator and the current plate is changed.
- FIG. 4 is a relational diagram showing the average wind speed at each point in the traveling direction of the flight trajectory when the presence or absence of the blower generator and the current plate is changed.
- FIG. 5 is a relational diagram showing the average wind speed at each point in the flight trajectory traveling direction when the installation position of the air blowing generator of the present invention is changed.
- FIG. 6 is a relational diagram showing the average wind speed at each point in the flight trajectory traveling direction when the installation angle position of the air blowing generator of the present invention is changed.
- FIG. 7a is a relational diagram showing the average wind speed at each point of the present invention.
- FIG. 7b is a relational diagram showing the average wind speed at each point of the present invention.
- FIG. 8a is a relationship diagram showing the relationship between the conveyor speed and the wind speed of the present invention.
- FIG. 8b is a relationship diagram showing the relationship between the conveyor speed and the wind speed of the present invention.
- FIG. 8c is a relationship diagram showing the relationship between the conveyor speed and the wind speed of the present invention.
- FIG. 9 is a relationship diagram showing the selection purity / recovery rate of the target resin according to the embodiment of the present invention.
- FIG. 10a is a side view showing a conventional sorting apparatus.
- FIG. 10b is a side view showing a conventional sorting apparatus.
- FIG. 10c is a side view showing a conventional sorting apparatus.
- FIG. 11 is a plan view showing a conventional sorting apparatus.
- FIG. 12a is a side view showing a conventional sorting apparatus.
- FIG. 12 b is a side view showing a conventional sorting apparatus.
- FIG. 12c is a side view showing a conventional sorting apparatus.
- FIG. 13 is a table showing the results of measuring the flight variation with respect to the wind speed.
- FIG. 14 is a table showing the results of measuring the flight variation with respect to the wind speed.
- FIG. 15 is a table showing the results of sorting purity and
- 1a to 1c are side views showing the sorting device.
- FIG. 2 is a plan view showing the sorting device.
- the sorting apparatus 10 is configured from a small piece group 2 that is a sorting target including a plurality of first small pieces 2A made of the first material type and a plurality of second small pieces 2B made of the second material type.
- a sorting device that separately sorts the first small piece 2A and the second small piece 2B as specific material types, and includes a conveyor 1, an identification device 3, a blower 6, and a current plate 7.
- the sorting device 10 includes an upper rectifying plate 7A and a lower rectifying plate 7B as the rectifying plate 7.
- the sorting apparatus 10 further includes a first sorting plate 8A and a second sorting plate 8B as the sorting plate 8.
- the sorting device 10 includes a first sorting unit and a second sorting unit as a space arranged in the transport direction of the conveyor 1 from the transport end 4 (positive direction of the X axis in the drawing).
- the material type of the specific material type is not particularly limited, such as resin, metal, non-ferrous metal.
- the material type of the specific material type needs to be able to identify most of the specific material type by the identification device 3.
- the particle size of the specific material type is not particularly limited, but the general particle size is in the range of 5 mm to 100 mm, which is a particle size typified by crushed products of home appliance recycled products, and the density (composition) of the specific material type is Many objects fall within the range of 0.9 to 1.3 g / cm 3 .
- a description will be given on a selection target in which the majority of the density is 0.9 to 1.3 g / cm 3 and the material type is a thermoplastic resin.
- the conveyor 1 is a device that places the small pieces 2A to 2D constituting the small piece group 2 and conveys them in one direction (the positive direction of the X axis in the figure).
- a belt conveyor is adopted as the conveyor 1.
- the conveyor 1 includes a transport end 4 as a final position where the small pieces 2A, 2B, 2C, and 2D to be sorted are transported, and the small pieces 2A, 2B, 2C, and 2D that have passed through the transport end 4 are in space. Will be released.
- the identification device 3 is a device that identifies the material type for the material type of the first small piece 2A, the material type of the second small piece 2B, and other material types.
- a near-infrared sensor is employed, and the material type of the specific material type is PP or ABS thermoplastic resin.
- the identification device 3 includes a light source that emits a desired wavelength region (for example, a near-infrared region), a near-infrared sensor that captures reflected light, and a waveform spectrum that is registered in advance with respect to the waveform spectrum obtained by the near-infrared sensor. Can be identified from the selection target.
- the identification device 3 may identify the first small piece 2A and the second small piece 2B, which are specific material types, and the small pieces 2C and 2D, which are other material types, based on different wavelength bands, shapes, and colors.
- a sensor having the best sensitivity among various methods such as a visible light sensor such as image recognition, a near infrared sensor, a mid infrared sensor, and an X-ray sensor may be adopted or combined.
- the identification device 3 may select the light receiving method according to the selection target (the type of the specific material type), such as adopting a configuration in which the selection target is discriminated by the transmission type instead of the reflection type.
- the small pieces 2A to 2D constituting the small piece group 2 to be sorted are conveyed in one direction (in the positive direction of the X axis in the figure) by the belt conveyor as the conveyor 1.
- the identification device 3 can obtain a continuous signal by scanning with a multi-rotation mirror in a direction crossing the conveying direction of the conveyor 1 (width direction of the conveyor 1, Y-axis direction in the figure).
- the position information position information in the width direction of the conveyor 1 where the seed and the material type of the second small piece 2B exist and the other small pieces 2C, 2D can be identified.
- the identification device 3 also functions as a position information acquisition device.
- the identification device 3 is not a multi-rotation mirror, and may employ a position information detection method suitable for a selection target from other laser scanning methods such as galvano or various methods such as line sensor scanning. .
- the blower 6 is along the conveyance surface on which the small pieces 2A to 2D (small piece group 2) are conveyed, that is, the surface (upper surface) of the conveyor 1, and from the identification device 3 of the conveyor 1 to the conveyance end 4 (conveyance direction of the conveyor 1).
- This is a device that generates an air flow 9 with respect to the flight direction of the small piece group 2 toward the.
- the blower 6 that supplies the airflow 9 includes a so-called slit nozzle head having a slit-like opening that extends in the width direction (Y-axis direction in the drawing) of the conveyor 1.
- the slit nozzle head of the blower 6 is provided above the conveyor 1, along the conveying direction of the conveyor 1 (positive direction in the X-axis direction in the drawing), and along the conveying surface, and the effective width (small piece group) of the conveyor 1. 2 is the opening width that can supply the airflow 9 in a range equal to or wider than the effective width of the conveyor 1. Since there is resistance at the boundary surface, it is desirable that the blower 6 is made equal to or greater than the effective width of the conveyor so that the wind speed is uniform over a wide range.
- the blower 6 may include a nozzle such as a slit nozzle head that can move to an arbitrary position, and may move the nozzle based on position information or change the direction of the nozzle.
- a nozzle such as a slit nozzle head that can move to an arbitrary position, and may move the nozzle based on position information or change the direction of the nozzle.
- the first sorting unit and the second sorting unit (hereinafter may be collectively referred to as “sorting unit”), based on the positional information of the first small piece 2A and the second small piece 2B obtained from the identification device 3, gas such as air. This is a portion (space region) that is generated in a pulsed manner and is blown off the first small piece 2A and the second small piece 2B that are discharged from the conveying end 4 of the conveyor 1 and are flying in the space to change the falling path.
- the first sorting unit and the second sorting unit are each provided with a first jetting device and a second jetting device as jetting devices.
- the first injection device includes a first nozzle group 5A in which a plurality of nozzles are arranged in a row in the first sorting section, and an air pressure source (not shown) connected to the first nozzle group 5A.
- the second injection device includes a second nozzle group 5B in which a plurality of nozzles are arranged in a row in the second selection unit, and an air pressure source (not shown) connected to the second nozzle group 5B. Yes.
- the first injection device is a device that can blow off the first small piece 2A in the first sorting section by an air flow that is pulsedly discharged from a specific nozzle selected from the first nozzle group 5A.
- the second injection device blows off the second small piece 2B to a place different from the first small piece 2A in the second sorting section by an air flow discharged in a pulse manner from a specific nozzle selected from the second nozzle group 5B. It has become.
- the rectifying plate 7 is a member that is arranged along the flight path of the small piece group 2 to be selected and guides the airflow generated by the blower 6 in a stable state.
- the upper rectifying plate 7A which is one of the rectifying plates 7, protrudes from the conveyor 1 in the direction in which the small pieces 2A, 2B, 2C, 2D (small piece group 2) are discharged, and the discharged small pieces 2A, 2B, 2C, It is a board
- the upper current plate 7A is equal to the width of the slit nozzle head of the blower 6 (the length in the Y-axis direction), the effective width of the conveyor 1, or the width of the slit nozzle head, or A plate-like member having a width wider than the effective width of the conveyor 1.
- the upper rectifying plate 7A two plates of a plate covering the range from the blower 6 to the slit nozzle head to the first nozzle group 5A and a plate covering the range from the first nozzle group 5A to the second nozzle group 5B. Is arranged.
- the lower rectifying plate 7B which is one of the rectifying plates 7, is a plate material that is disposed below the flight path of the emitted small pieces 2A, 2B, 2C, and 2D (small piece group 2).
- the lower rectifying plate 7B is equal to the width of the slit nozzle head of the blower 6 (the length in the Y-axis direction), the effective width of the conveyor 1, or the width of the slit nozzle head, or A plate-like member having a width wider than the effective width of the conveyor 1.
- the lower rectifying plate 7B is disposed so as to protrude downward in the transport direction from the transport end 4 of the conveyor 1 or the vicinity thereof along the flight path of the small piece group 2.
- the upper rectifying plate 7A and the lower rectifying plate 7B are provided along the flight path so as to sandwich the flight paths of the small pieces 2A, 2B, 2C, and 2D to be selected from above and below. Further, the lower rectifying plate 7B is installed so that the starting end thereof is along the conveyor surface, and the upper surface of the lower rectifying plate 7B is below the flight path of the small pieces 2A, 2B, 2C, and 2D to be selected.
- the upper rectifying plate 7A and the lower rectifying plate 7B are plate members that control the airflow 9 around the flight path of the small pieces 2A, 2B, 2C, and 2D to be selected, and are blown by the upper rectifying plate 7A and the lower rectifying plate 7B.
- the air flow 9 that flows out of the device 6 and leaves the conveyor 1 can be rectified so that the small pieces 2A, 2B, 2C, and 2D (small piece group 2) have a desired flight path.
- the first sorting plate 8A and the second sorting plate 8B are ejected from the flight path of the small pieces 2A, 2B, 2C, and 2D (small piece group 2) to be sorted. This is a member for sorting and maintaining the separated small pieces 2A and small pieces 2B of a specific material type.
- the sorting plates 8A, 8B are arranged below the flight path of the small pieces 2A, 2B, 2C, 2D (small piece group 2).
- the sorting plates 8 ⁇ / b> A and 8 ⁇ / b> B are plate materials that extend in the vertical direction (Z-axis direction) and stand up and spread in the width direction (Y-axis direction) of the conveyor 1 or more.
- the first sorting plate 8A and the second sorting plate 8B are respectively arranged in parallel to the first nozzle group 5A, and the first sorting plate 8A is arranged closer to the conveyor 1 than the second sorting plate 8B. Yes.
- the first sorting plate 8A is higher than the height of the second sorting plate 8B.
- the height of the first sorting plate 8A and the height of the second sorting plate 8B are small pieces 2A, 2B, 2C, 2D (small pieces). It corresponds to the flight path of group 2).
- the sorting plates 8A and 8B may adopt any shape as long as the first small piece 2A and the second small piece 2B cannot pass, such as those provided with a large number of holes or a net-like lattice.
- the present invention is not limited to the above embodiment.
- another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention.
- the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.
- FIGS. 1a to 1c sequentially show the steps of sorting the small pieces 2A and 2B of a desired specific material type from the small pieces 2A, 2B, 2C and 2D (small piece group 2) to be sorted by the conveyor 1.
- the conveyor 1 has a head pulley radius of 170 mm, for example, and can be operated under conditions of a conveyance speed of 2 m / s and 3 m / s.
- the small pieces 2A, 2B, 2C, and 2D which are selection targets, are transported by the conveyor 1 in the transport direction (X-axis direction).
- the first small piece 2A and the second small piece 2B are the desired specific material type.
- the small pieces 2A, 2B, 2C, and 2D (small piece group 2) to be selected pass under the identification device 3 to identify the material type and position.
- the effective width of the conveyor 1 (the width capable of conveying the small piece group 2) is equal to or wider than the effective width of the conveyor 1.
- the airflow 9 is continuously supplied to the range. That is, the airflow 9 is steadily supplied over the steps shown in FIGS. 1a to 1c.
- the airflow 9 generated by the blower 6 is a stable airflow by the upper rectifying plate 7A and the lower rectifying plate 7b.
- the small pieces 2A, 2B, 2C, and 2D which are the objects of selection identified by the identification device 3, are discharged from the transport end 4.
- the small pieces 2A, 2B, 2C, and 2D (small piece group 2) ride on the airflow 9 and fly along a predetermined flight path. Since the airflow 9 generated by the blower 6 is a stable airflow by the upper rectifying plate 7A and the lower rectifying plate 7b, the flight path of the small piece group 2 riding on the airflow 9 can be stabilized.
- the first small piece 2A of the desired specific material type passes under the first nozzle group 5A, air is discharged in a pulsed manner only from the corresponding nozzle of the first nozzle group 5A.
- the first small piece 2A of a desired specific material type is blown off and selected.
- the direction in which the first small piece 2A is blown off is the direction intersecting the flight path, more specifically, the direction substantially perpendicular to the tangent to the flight path, and the first small piece 2A is the first sorting plate. The direction is over 8A.
- the small pieces 2B, 2C, and 2D fly on the flight path as they are, but when the second small piece 2B that is the second desired specific material type passes under the second nozzle group 5B. Then, air is discharged in a pulsed manner only from the corresponding nozzle of the second nozzle group 5B, and the second small piece 2B of the desired specific material type is blown off from the flight path of the small pieces 2B2C and 2D (small piece group 2) to be selected.
- the direction in which the second small piece 2B is blown off is the direction intersecting the flight path, more specifically, the direction substantially perpendicular to the tangent to the flight path, and the second small piece 2B is the first sorting plate. It is the direction blown off between 8A and the second sorting plate 8B.
- the first nozzle group 5A and the second nozzle group 5B which are the injection devices arranged in the front, are controlled by the time such as the encoder value, the small pieces 2A and the small pieces 2B to be selected are the first nozzle group 5A.
- the time to pass below the second nozzle group 5B cannot be repelled with high precision unless they are the same. Sorting accuracy is not improved.
- the air flow 9 (assist blow) is performed at the same speed in the transport direction from the rear or the vicinity of the transport end 4. Is sent by the blower 6 so that the passage time from when the air is discharged into the space at the conveying speed of the conveyor 1 to when the pulsed air is discharged by the first nozzle group 5A or the second nozzle group 5B is limited to a plurality of small pieces 2A. In addition, the plurality of pieces 2B can be the same. As described above, the air resistance of the small piece group 2 in flight can be reduced by blowing the selection target with the blower 6.
- the pulley part including the transport end 4 is a rotating body. It is preferable to prevent the flow of the airflow 9 from proceeding (rolling) in the rotation direction and to advance the blower generated from the supply device with high accuracy in the transport direction. For this purpose, it is better to eliminate the influence of the operation in the rotation direction. good. Therefore, the lower rectifying plate 7B is provided, and the flow of the airflow 9 toward the rotating body can be suppressed. Moreover, in order to prevent the airflow 9 from diffusing on the upper side of the airflow 9, it is possible to suppress the diffusion of the flow of the airflow 9 by providing the upper rectifying plate 7A.
- the above-described sorting method can reduce variations in the flight path due to differences in the shape and specific gravity of the small pieces 2A, 2B, 2C, and 2D to be sorted. Therefore, in the flight path of the small pieces 2A, 2B, 2C, and 2D, the first small piece 2A, which is a small piece of a specific material type, can be accurately blown by the air from the first nozzle group 5A, and further beyond the flight path. Thus, the second small piece 2B can be accurately blown off with the air from the second nozzle group 5B. Therefore, in a series of small pieces 2A, 2B, 2C, and 2D flight, it is possible to select small pieces of two kinds of material types with high accuracy.
- a pulse is generated downward from the first nozzle group 5A and the second nozzle group 5B arranged above the flight path of the small pieces 2A, 2B, 2C, and 2D to be selected.
- the first small piece 2A and the second small piece 2B are blown down and sorted by discharging air.
- the arrangement of the first nozzle group 5A and the second nozzle group 5B is small pieces. It is not limited to the upper part of the flight path of 2A, 2B, 2C, 2D.
- the first nozzle group 5A and the second nozzle group 5B are arranged below the flight path, and the air is pulsed upward to blow out small pieces of a specific material type.
- the first nozzle group 5A may be disposed above the flight path, and the second nozzle group 5B may be disposed below the flight path (or vice versa).
- the nozzle group can be configured such that not only the first nozzle group 5A and the second nozzle group 5B but also other nozzle groups are arranged above or below the flight path.
- it can be used on the same principle by expanding to the third nozzle and selecting three or more kinds of materials.
- FIGS. 3a to 3c show the state of airflow generation around the flight path of the conveyor 1 and the small pieces 2A, 2B, 2C, and 2D in the process of selecting the small piece group 2.
- FIG. 3a to 3c show the state of airflow generation around the flight path of the conveyor 1 and the small pieces 2A, 2B, 2C, and 2D in the process of selecting the small piece group 2.
- FIG. 3a is a diagram showing a state in which the airflow 9 is not generated by the blower 6, and shows the generation of airflow around the flight path of the conveyor 1 and the small piece group 2 having a conveyance speed of 3 m / s.
- the conveyor 1 is operating at a conveyance speed of 3 m / s, an air flow of 1.1 m / s is generated on the surface of the conveyor 1.
- the small piece group 2 as an object is transported at 3 m / s up to the transport end 4, but after passing through the transport end 4, the flight path varies with the influence of an air flow of 1.1 m / s. Since it falls, it cannot be collected with high accuracy.
- FIG. 3 b is a diagram in which an airflow 9 is generated by the blower 6.
- a slit nozzle (Y33768) manufactured by Spraying Systems was used.
- the blower 6 includes a slit nozzle head having a slit width of 1 mm, and the air volume can be controlled by an inverter.
- the airflow 9 is continuously supplied from the blower 6 that supplies the airflow 9 in the conveying direction of the conveyor 1 along the conveyor surface and in a range equivalent to the effective width of the conveyor 1 or wider than the effective width of the conveyor 1. Yes.
- the air velocity 9 is supplied from the blower 6 so that the wind speed at the conveyance end 4 of the conveyor 1 is equal to 3 m / s, that is, equal to the conveyance speed of the conveyor 1, the first nozzle group 5 ⁇ / b> A is selected in the vertically downward direction.
- An air flow of 1.5 m / s is generated around the flight path of the small piece.
- FIG. 3c is a diagram showing a state in which the air flow 9 is generated from the blower 6 and the upper rectifying plate 7A and the lower rectifying plate 7B are arranged.
- the upper rectifying plate 7A can also block the airflow 9 upward, so that it can be selected.
- the airflow further goes in the direction of the flight path of the small pieces 2A, 2B, 2C, and 2D.
- the upper rectifying plate 7A has a shape that surrounds the upper side of the flight path other than the first nozzle group 5A and the second nozzle group 5B (a structure that does not inhibit air from the first nozzle group 5A and the second nozzle group 5B).
- the first nozzle and the second nozzle are surrounded by an acrylic plate having a thickness of about 3 mm and a length of about 500 mm (the width is the same as the effective width of the conveyor 1).
- the lower rectifying plate 7B was an acrylic plate having a thickness of 3 mm and a length of 250 mm (the width is the same as the effective width of the conveyor 1).
- an air flow 9 of 2.9 m / s is generated around the flight path of a small piece that is a vertically downward selection target of the first nozzle group 5A. Further, the air flow 9 of 2.8 m / s was found around the flight path of the small piece group 2 in the vertically downward direction of the second nozzle group 5B.
- the blower 6, the upper rectifying plate 7A, and the lower rectifying plate 7B it is possible to control the conveyance speed from the conveyor 1 and the wind speed after jumping out from the conveyance end 4 as much as possible. .
- FIG. 4 shows a protruding tip portion 11A that is the conveying end 4 of the conveyor 1, a point 11B that passes through the discharge part of the first nozzle group 5A in the flight path, and a point 11C that passes through the discharge part of the second nozzle group 5B in the flight path. It is the result of the average wind speed at.
- (X, Z) (0 mm, 0 mm) with respect to the conveyance direction (X) from the conveyance end 4 and the gravity direction (Z)
- an object when receiving pulsed air from the first nozzle group 5A passes.
- (X, Z) (250 mm, ⁇ 60 mm)
- the above-described coordinates may be abbreviated in order as the jumping tip 11A (sometimes abbreviated as point 11A) of the conveyor and the point 11B (point 11B) passing through the discharge part of the first nozzle group in the flight trajectory. ), A point 11C (may be abbreviated as a point 11C) that passes through the ejection part of the second nozzle group in the flight trajectory.
- the above 11B and 11C change depending on the conveyor speed, but here, since the purpose is to grasp the relative comparison of each point, the measurement was performed at the same coordinates regardless of the conveyor speed.
- the conveyor speed was 3 m / s, and the average wind speed value for 60 seconds of a hot wire probe (TESTO 425) was adopted as the anemometer.
- TESTO 425 the average wind speed value for 60 seconds of a hot wire probe
- the wind speed condition caused by the air flow 9 generated from the blower 6 at the protruding tip 11A (point 11A) of the conveyor is very important. Since the airflow 9 spreads in the air in the order of the point 11A, the point 11B, and the point 11C, the wind speed measured at each point gradually decreases. In the following, the results of wind speed measured at each point will be mainly described.
- FIG. 5 shows the results when the position of the blower is changed.
- the average is obtained for each point (11A, 11B, 11C) indicated on the horizontal axis. It is the figure which measured the wind speed.
- FIG. 6 shows the result of examining the wind speed when the installation direction of the blower 6 is changed.
- the installation angle of the air blower 6 is changed ⁇ 7 ° up and down from the angle along the flight path of the small piece group 2 to be selected.
- 7a and 7b show the result of changing the wind speed under the condition (No. 4) in which the upper and lower rectifying plates shown in FIG. 4 are attached.
- 7a shows the case where the conveyor conveyance speed is 3 m / s
- FIG. 7b shows the case where the conveyor conveyance speed is 2 m / s. Since the influence of the rotation of the pulley is different when the conveyor conveyance speed is different, the wind speed is slightly affected. Under any condition, it was found that the point 11A, the point 11B, and the point 11C gradually become smaller in this order.
- FIG. 13 is a result of measuring the flight variation with respect to the wind speed measured in FIGS. 7a and 7b in order to examine the influence of the wind speed state on the recovery of the target material. It is a table
- a PP resin of 7.5 mm ⁇ 7.5 mm ⁇ 2 mm thickness was used because it is intended for a resin having a small particle size that is generated when the home appliance resin is crushed into small pieces by a crusher.
- the conveyance speed of the conveyor 1 was 3 m / s, and the air blower 6, the upper rectifying plate 7A, and the lower rectifying plate 7B were implemented on the conditions of No4 of FIG.
- image analysis software using a high speed camera (DITECT HAS-L1M 500FPS).
- FIG. 13 shows the result of calculating the flight variation from the difference of each sample (small piece) with respect to the arrival time at the point 11C passing under the second nozzle group 5B in the flight path.
- the moving speed of the small pieces in the conveying direction was calculated assuming that the moving speed was 3 m / s, which was the same as the conveyor speed.
- FIG. 14 shows the measurement results of the flight variation when the conveyor speed is 2 m / s.
- the other conditions were the same as in FIG.
- the conveying speed of the conveyor 1 is 2 m / s
- the wind speed of the airflow 9 near the conveying end 4 is brought close to 2 m / s which is the conveying speed of the conveyor 1
- the flying variation of the small pieces becomes the smallest
- the conveyor 1 It was the most stable when it reached 2.12 m / s, which is the closest to the transport speed.
- the flight variation increases.
- the conveying speed of the conveyor 1 and the wind speed of the airflow 9 in the vicinity of the conveying end 4 coincide with each other or substantially coincide with each other.
- FIGS. 8a to 8c are diagrams schematically showing the relationship of the conveying speed of the conveyor 1, which is an important factor for reducing the flying variation.
- the conveyance speed here defines the conveyance speed of the conveyor 1 as 1F and the wind speed from the blower 6 as 6F.
- the magnitude relationship between 1F and 6F greatly contributes to flight variation.
- the size of the arrows in FIGS. 8a to 8c represents the magnitude of the wind speed.
- the most preferable result is shown in FIGS. 8a to 8c.
- the configuration as shown in FIG. 8b is preferable, and maintaining the wind speed environment is the most important.
- flight variation can be stabilized by arbitrarily setting the wind speed condition according to the conveyor speed.
- FIG. 9 shows the sorting purity when the small piece group 2 and the small piece made of ABS and the small piece made of ABS are sorted by two nozzle groups in a series of flight paths.
- sample particle size an average value obtained by selecting three times using 240 pieces of samples having different sizes of 7.5 mm square to 500 mm square was adopted.
- the air volume was changed from the blower 6, and the wind speed at the point 11A was adjusted to a range from 0.27 m / s to 4 m / s as shown on the horizontal axis.
- the sorting purity and recovery yield were calculated from the following formulas.
- Sorting purity (%) (Recovered desired resin weight / congregation resin weight) x 100
- the wind speed at the point 11A needs to be in the range of 2.51 m / s to 3.45 m / s. Further, as shown in FIG. 7a, when the conveyor conveyance speed is 3 m / s, it is necessary to set the wind speed condition within the range of 2.51 m / s to 3.45 m / s for the point 11A and make the flight variation within 44 mm. In other words.
- FIG. 15 shows a condition that the point 11A (conveying end 4) having the best sorting performance in FIG. 9 is 3 m / s, and the small piece with PP as the grade is the first nozzle group 5A and ABS as the grade.
- the small piece is the result of the sorting purity and recovery yield blown off by the second nozzle group 5B.
- the results of sorting by the conventional sorting method are also shown.
- Collected yield (%) (desired desired resin weight / desired resin weight contained in the small piece group 2 before sorting) ⁇ 100
- the present invention is not limited to the above embodiment.
- another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention.
- the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.
- the present invention it is possible to increase the sorting purity and recovery yield of small pieces of a desired specific material type even when individually separating small pieces made of two types of materials in a series of flight routes.
- As a sorting device and sorting method for recycling small pieces of a specific material type contained in waste it can be applied to material resource circulation.
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Abstract
Description
1F コンベアからの搬送速度
2 小片群
2A 第一小片
2B 第二小片
3 識別装置
4 搬送端
5 ノズル群
5A 第一ノズル群
5B 第二ノズル群
6 送風装置
6F 送風装置からの風速
7A 上部整流板
7B 下部整流板
8A 第一選別板
8B 第二選別板
9 気流
10 選別装置
11A コンベアの飛び出し先端部の地点座標
11B 飛翔軌道において第一ノズル群の吐出部を通過する地点
11C 飛翔軌道において第二ノズル群の吐出部を通過する地点
Claims (6)
- 特定材種物と、他材種物とが混在する選別対象から特定材種物と他材種物とを選別する選別方法であって、
前記選別対象をコンベアに載置した状態で一方向に搬送し、
前記コンベア上に載置された特定材種物の組成を識別装置により識別し、
前記コンベアの搬送方向の先端部において、前記コンベアの搬送速度と一致、または、ほぼ一致する風速の気流を送風装置により発生させ、
前記選別対象の飛翔経路に沿って配置される整流板により前記気流を安定させ、
識別された特定材種物の位置情報を取得し、前記コンベアから前記気流を受けて飛翔する特定材種物の通過時に噴射装置によりパルスエアを噴射する
選別方法。 - 前記送風装置が発生させる気流は、前記コンベアの搬送速度をA(m/s)とし、前記コンベアの搬送方向の先端部における前記気流の風速をB(m/s)とした場合、B/Aの値が1±0.15以内となるような気流であることを特徴とする請求項1に記載の選別方法。
- 前記コンベアの搬送方向の先端部において、前記気流の方向は、前記選別対象の飛び出し方向と一致している
請求項1または2に記載の選別方法。 - 特定材種物と、他材種物とが混在する選別対象から特定材種物と他材種物とを選別する選別装置であって、
前記選別対象を載置状態で一方向に搬送するコンベアと、
前記コンベア上に載置された特定材種物の組成を識別する識別装置と、
識別された特定材種物の位置情報を取得し、前記コンベアから飛翔する特定材種物の通過時にパルスエアを噴射する噴射装置と、
前記コンベアの搬送方向の先端部において、前記コンベアの搬送速度と一致、または、ほぼ一致する風速の気流を発生させる送風装置と、
前記選別対象の飛翔経路に沿って配置される整流板と
を備える選別装置。 - 前記送風装置は、
前記コンベアの搬送速度をA(m/s)とし、前記コンベアの搬送方向の先端部における前記気流の風速をB(m/s)とした場合、B/Aの値が1±0.15以内となるような気流を発生させるものである
請求項4に記載の選別装置。 - 前記送風装置は、
前記コンベアの搬送方向の先端部において、前記選別対象の飛び出し方向と一致する方向の気流を発生させる
請求項4または5に記載の選別装置。
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CN201480000408.7A CN105358266B (zh) | 2013-04-25 | 2014-01-23 | 物质的分选装置、分选方法 |
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TWI730483B (zh) * | 2018-10-31 | 2021-06-11 | 日商Jx金屬股份有限公司 | 原料供給裝置、電子、電氣機器零件屑之處理裝置及電子、電氣機器零件屑之處理方法 |
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CN105358266A (zh) | 2016-02-24 |
JPWO2014174736A1 (ja) | 2017-02-23 |
US20150231671A1 (en) | 2015-08-20 |
EP2990129B1 (en) | 2018-03-07 |
JP5873989B2 (ja) | 2016-03-01 |
EP2990129A1 (en) | 2016-03-02 |
CN105358266B (zh) | 2017-07-11 |
EP2990129A4 (en) | 2016-07-06 |
US9381546B2 (en) | 2016-07-05 |
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