CN102476073B - Method of separating plastic and plastic Separator - Google Patents
Method of separating plastic and plastic Separator Download PDFInfo
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- CN102476073B CN102476073B CN201110121056.9A CN201110121056A CN102476073B CN 102476073 B CN102476073 B CN 102476073B CN 201110121056 A CN201110121056 A CN 201110121056A CN 102476073 B CN102476073 B CN 102476073B
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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
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention provides method of separating plastic and plastic Separator, as the method for separating plastic of the congener plastics (21) of sorting band identical polar electricity, it possesses the operation of the plastics (21) being separated more than a reference value plastics (21) and not enough a reference value based on a reference value, between the Unit Weight electric charge mean value of wherein the Unit Weight electric charge mean value of the plastics (21a) that the thickness of this reference value among plastics (21) is thick and the thin plastics (21b) of thickness.Thus, the impact that can suppress to be caused by plastic shape can be obtained and carry out the method for separating plastic of separating plastic by each thickness.
Description
Technical field
The present invention relates to method of separating plastic and plastic Separator, particularly for method of separating plastic and the plastic Separator of the charged plastics of sorting.
Background technology
In the resource reutilization operation of household appliances etc., generally after the single part easily reclaimed is removed in operation by hand, by pulverizer milling product.First the fragment pulverized by pulverizer utilizes magnetic force or difference in specific gravity to divide and elects sheet metal mixture and plastic sheet mixture as.
In order to using the Reuse of materials of plastic sheet mixture as household appliances, various species separating plastic must be pressed from plastic sheet mixture.As the method for pressing various species separating plastic, as we all know there are the method for separating utilizing difference in specific gravity or the method for separating utilizing electrostatic.From plastic sheet mixture, various species separating plastic is pressed with these method for separating.Because these plastics sub-elected are obtained by milling product, so the plastics having thickness different in the plastics of this sorting mix.
After pressing various species separating plastic, such as, remove by the harmful substance of irradiating in X-ray check plastics the plastics including harmful substances.Now, because the deviation of plastic thickness becomes the reason causing accuracy of detection to reduce, so, seek to carry out separating plastic by each thickness.
In addition, in household appliances, because manufacturing process is different for thick plastics and thin plastics, even the plastics of identical type, the plastics that also use molecular weight etc. are different.By pressing thickness sorting plastics, the regenerated plastics corresponding with thin plastics manufacturing process separately to thick plastics can be obtained.For this reason, also seek from this point of view to carry out separating plastic by each thickness.
As the method for pressing thickness sorting plastics, such as, propose in Japanese Unexamined Patent Application Publication 2006-505419 publication and gap separator is set by separating plastic one-tenth by the plastics of the slotted eye of gap separator with not by the method for the plastics of slotted eye.
In the plastics obtained with pulverizer pulverizing household appliances etc., due to the shape of product or the crush force according to pulverizer of pulverizing, there are the plastics of curved shape more.
In the method described in above-mentioned publication, whether carried out the thickness of separating plastic by the slotted eye of the length of certain thickness with plastics.But be not limited to thick plastics, even if for thin plastics, the plastics of curved shape can not pass through this slotted eye sometimes, so it is difficult for carrying out separating plastic by method described in above-mentioned publication by each thickness.
Summary of the invention
The present invention makes in view of above-mentioned problem, its objective is and provides the impact that can suppress to be caused by the shape of plastics, the method for separating plastic and the plastic Separator that carry out separating plastic by each thickness.
Method of separating plastic of the present invention is for the method for separating plastic of sorting with the same kind plastics of identical polar electricity, has following operation.The plastics of more than a reference value and the plastics of not enough a reference value are separated, between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of the plastics that the thickness of this reference value among plastics is thick and the thin plastics of thickness based on a reference value.
According to method of separating plastic of the present invention, by based on a reference value between the Unit Weight electric charge mean value of the thick plastics of the thickness be set among plastics and the Unit Weight electric charge mean value of the thin plastics of thickness, be separated the plastics of more than a reference value and the plastics of not enough a reference value, thick plastics and thin plastics can be reclaimed respectively.For this reason, the impact because plastic shape causes can be suppressed, separating plastic can be carried out by each thickness.
Above-mentioned and other object, feature, situation and advantage of the present invention can carry out the following detailed description involved in the present invention understood and clear and definite according to associated drawings.
Accompanying drawing explanation
Fig. 1 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 1.
Fig. 2 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 2.
Fig. 3 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 3.
Fig. 4 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 4.
Fig. 5 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 5.
Fig. 6 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 6.
Fig. 7 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 7.
Fig. 8 is the schematic diagram representing the method for separating plastic using plastic Separator in embodiments of the present invention 8.
Detailed description of the invention
Below, based on accompanying drawing, embodiments of the present invention are described.
(embodiment 1)
Start, the method for separating plastic of embodiments of the present invention 1 is described.
First, the plastic Separator of present embodiment is described.
With reference to Fig. 1, plastic Separator 1 is the device for the charged plastics 2 of sorting.Plastics 2 comprise positively charged plastics 21 and electronegative plastics 22.Positively charged plastics 21 positively charged.Positively charged plastics 21 comprise with the thick plastics 21a of the thickness of identical polar electricity and the thin plastics 21b of thickness.Electronegative plastics 22 are electronegative.Electronegative plastics 22 comprise with the thick plastics 22a of the thickness of identical polar electricity and the thin plastics 22b of thickness.In addition, positively charged plastics 21 can be ABS resins.Now, the thickness of the thick plastics 21a in positively charged plastics 21 can be more than 2mm, and the thickness of thin plastics 21b can be below 1mm.
Plastic Separator 1 mainly has electrod assembly 3, returnable 4, Charging system 5 and transfer unit 6.
Electrod assembly 3 is configured to faced by the fall area 7 for making charged plastics 2 fall.As long as electrod assembly 3 at least arranges one, but also can have earth electrode 3a and positive electrode 3b.When electrod assembly 3 has earth electrode 3a and positive electrode 3b, accept electrostatic force from earth electrode 3a and positive electrode 3b both sides, and can more correctly sorting positively charged plastics 21 and electronegative plastics 22.
Returnable 4 is configured in the below of fall area 7.Returnable 4 has ground side returnable 41 and positive side returnable 42.Ground side returnable 41 is arranged to recyclable positively charged plastics 21.Ground side returnable 41 is configured in earth electrode 3a side in the below of fall area 7.Positive side returnable 42 is arranged to recyclable electronegative plastics 22.Positive side returnable 42 is configured in positive electrode 3b side in the below of fall area 7.
Ground side returnable 41 in returnable 4 has region (recovery zone) 4b and another region (recovery zone) 4c that are separated by demarcation strip 4a.Ground side returnable 41 in returnable 4 has separates a region 4b of ground side the returnable 41 and demarcation strip 4a of another region 4c.Demarcation strip 4a is arranged to extend to along the respective direction of the earth electrode 3a of electrod assembly 3 and positive electrode 3b.Demarcation strip 4a is arranged in the earth electrode 3a of electrod assembly 3 and the crisscross extension in the direction of positive electrode 3b separately and faced by fall area 7.
Ground side returnable 41 in returnable 4 is configured to reclaim thick plastics 21a among the plastics 21a thick with the thickness of the positively charged plastics 21 of identical polar electricity and the thin plastics 21b of thickness at region 4b, is configured to reclaim thin plastics 21b at another region 4c.
Demarcation strip 4a carrys out desired location based on a reference value between the Unit Weight electric charge mean value of the thick plastics 21a be set in positively charged plastics 21 and the Unit Weight electric charge mean value of thin plastics 21b.
In addition, because the positive side returnable 42 in returnable 4 does not have demarcation strip 4a, so, be not configured to separately to reclaim the thick plastics 22a of thickness in the electronegative plastics 22 of band identical polar electricity and the thin plastics 22b of thickness.
Charging system 5 is arranged to rotate in arrow R1 direction in the drawings.Charging system 5 is arranged through rotation and makes its frictional electrification to stir plastics 2.Charging system 5 is configured to from outlet 5a, charged plastics 2 to be discharged to transfer unit 6.
Transfer unit 6 is configured to the charged plastics 2 of discharging from Charging system 5 to be transported to the fall area 7 be located at below transfer unit 6.Transfer unit 6 such as can be suitable for conveyer belt, vibration feeder etc.Fall area 7 is the regions represented by single dotted broken line in figure, be to be located at from transfer unit 6 to returnable 4 the region for making charged plastics 2 fall.
Then, the method for separating plastic of the plastic Separator 1 adopting present embodiment is described.
With reference to Fig. 1, method of separating plastic is the method for the charged plastics 2 of sorting.First, the mixture of the plastics 2 of the positively charged plastics 21 of the positively charged by frictional electrification and electronegative electronegative plastics 22 is dropped into Charging system 5.By stirring in Charging system 5, by frictional electrification, positively charged plastics 21 positively charged, electronegative plastics 22 are electronegative.Charged positively charged plastics 21 and electronegative plastics 22 are discharged to transfer unit 6 from Charging system 5.
Be discharged to positively charged plastics 21 on transfer unit 6 and electronegative plastics 22 are transported to the top of fall area 7 by transfer unit 6.Positively charged plastics 21 and electronegative plastics 22 by falling from transfer unit 6 and supplying to fall area 7 above fall area 7.
By never illustrated power supply, voltage is applied to earth electrode 3a and positive electrode 3b, between earth electrode 3a and positive electrode 3b, form electric field.The whereabouts track of the charged plastics 2 fallen in fall area 7 is changed by the electrostatic force be subject to from this electric field.
In the process that fall area 7 falls, the whereabouts orbit transfer of charged plastics 2, charged plastics 2 are reclaimed by the returnable 4 be configured in below fall area 7.Positively charged plastics 21 in charged plastics 2 are reclaimed by the ground side returnable 41 in returnable 4 by electrostatic force at earth electrode 3a side joint, and electronegative plastics 22 are reclaimed by the positive side returnable 42 in returnable 4 by electrostatic force at positive electrode 3b side joint.
Be recovered to the plastics 21a thick with the thickness in the positively charged plastics 21 of identical polar electricity of ground side returnable 41 and the thin plastics 21b of thickness is recovered to the region 4b and another region 4c that are separated by demarcation strip 4a respectively.
In the process that fall area 7 falls, charged plastics 2 accept electrostatic force and the amount of movement that moves in the horizontal direction is determined by the Unit Weight carried charge of charged plastics 2, Unit Weight carried charge is larger, then in fall area 7, the amount of movement of horizontal direction (direction intersected with falling direction) is more.
Charged for plastics 2, charge accumulation is on the surface of plastics 2.For this reason, the Unit Weight quantity of electric charge of the thin plastics 21b in positively charged plastics 21 is more than thick plastics 21a.Therefore, the amount of movement of thin plastics 21b horizontal direction in fall area 7 is larger than thick plastics 21a.
With the amount of movement of the horizontal direction in the fall area 7 of thick plastics 21a and thin plastics 21b accordingly, utilize demarcation strip 4a that returnable 4 is separated into a region 4b and another region 4c, thus, when positively charged plastics 21 are reclaimed by returnable 4, reclaim thick plastics 21a at a region 4b of returnable 4, reclaim thin plastics 21b at another region 4c.
In addition, under the state setting the position of demarcation strip 4a based on a reference value be set between the Unit Weight electric charge mean value of thick plastics 21a and the Unit Weight electric charge mean value of thin plastics 21b, also can carry out the recovery of thick plastics 21a and thin plastics 21b.In addition, because thick plastics 21a and thin plastics 21b has multiple respectively, there is deviation in respective thickness, so, in order to be set to a reference value, applying unit weight electric charge mean value.
The position of demarcation strip 4a is set in the position that the positively charged plastics 21 with the electric charge suitable with a reference value fall.Thus, the thick plastics 21a of a reference value that the thin plastics 21b that Unit Weight electric charge mean value of hanking can be divided to exceed a reference value and Unit Weight electric charge mean value are not enough and reclaiming.Namely, by setting a reference value between the Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b of thick plastics 21a, a region 4b in the returnable 4 separated by demarcation strip 4a reclaims the thick plastics 21a of the not enough a reference value of Unit Weight electric charge mean value, exceedes the thin plastics 21b of a reference value at another region 4c recovery Unit Weight electric charge mean value.Thus, can the thick plastics 21a of sorting and thin plastics 21b.
Then, an example of the method for separating plastic of present embodiment is described in more detail.
In the resource reutilization operation of household appliances etc., pulverize by pulverizer the plastic hybrid obtained and form primarily of polypropylene (PP) resin, acrylonitrile-butadiene-styrene (ABS) (ABS) resin, polystyrene (PS) resin.After the PP resin sorting of light specific gravity being reclaimed by differential-density saparation, the plastic hybrid be made up of the PP resin of ABS resin, PS resin and remnants is dropped into Charging system 5.Stir in Charging system 5 and make ABS resin positively charged, make the PP resin strip negative electricity of PS resin and remnants.The ABS resin of positively charged falls in fall area 7 and is reclaimed by ground side returnable 41, and the PP resin of electronegative PS resin and remnants falls in fall area 7 and reclaimed by positive side returnable 42.
In the ABS resin reclaimed from household appliances, comprise to come free injection moulding and the ABS resin sheet of injection grade of parts that is shaped and the ABS resin sheet extruding grade of the parts from profile extruded.Thickness from the ABS resin sheet of injection grade is about 2mm, and the Unit Weight electric charge mean value formed by frictional electrification is roughly 20nC/g.In addition, said thickness is about 2mm, refers to 2mm ± 0.2mm.Thickness from the ABS resin sheet extruding grade is below 1mm, and the Unit Weight electric charge mean value formed by frictional electrification is roughly 50nC/g.
For this reason, reference value is become the such as 40nC/g between 20 ~ 50nC/g, set the position of the demarcation strip 4a of ground side returnable 41 corresponding thereto, thus, the ABS resin sheet from injection grade of thickness about 2mm is reclaimed by a region 4b, and below thickness 1mm is reclaimed by another region 4c from the ABS resin sheet extruding grade.Thus, can be divided into thickness about 2mm from the injection ABS resin sheet of grade and below thickness 1mm from the ABS resin sheet extruding grade.Like this, the ABS resin sheet of sorting can be divided into injection grade and extrude grade purposes separately and recycle.
Then, the action effect of present embodiment is described.
According to the present embodiment, charged corresponding to positively charged plastics 21, the whereabouts track of the positively charged plastics 21 fallen in fall area 7 is changed by electrod assembly 3, thus, thick plastics 21a and thin plastics 21b can be recovered to respectively the region 4b separated by demarcation strip 4a and another region 4c.For this reason, the impact that the shape because of plastics 2 causes can be suppressed, sorting can be carried out by each thickness to plastics 2.
But when carrying out sorting by each thickness to plastics 2, it is difficult for carrying out measuring sorting to the thickness of plastics 2, is unsuitable for a large amount of process.According to the present embodiment, by corresponding to the charged of positively charged plastics 21, being changed the whereabouts track of the positively charged plastics 21 fallen in fall area 7 by electrod assembly 3, thick plastics 21a and thin plastics 21b can be reclaimed respectively.That is, in the present embodiment, because do not carry out sorting with detecting the thickness of plastics 2, so, can separating plastic 2 in large quantities.
In addition, according to the present embodiment, the position of demarcation strip 4a is set based on a reference value be set between the Unit Weight electric charge mean value of thick plastics 21a and the Unit Weight electric charge mean value of thin plastics 21b.For this reason, the thick plastics 21a of the not enough a reference value of Unit Weight electric charge mean value can be reclaimed at a region 4b of the returnable 4 separated by demarcation strip 4a, exceed the thin plastics 21b of a reference value at another region 4c recovery Unit Weight electric charge mean value.
In addition, according to the present embodiment, positively charged plastics 21 are ABS resins, and the thickness of the thick plastics 21a in positively charged plastics 21 is more than 2mm, and the thickness of thin plastics 21b is below 1mm.For this reason, by reclaiming thick plastics 21a and thin plastics 21b respectively, can be divided into more than thickness 2mm from the injection ABS resin sheet of grade and below thickness 1mm from the ABS resin sheet extruding grade.Like this, the ABS resin sheet sub-elected can recycle again in the same use of injecting grade and extrude in grade.
(embodiment 2)
The method of separating plastic of embodiments of the present invention 2 is described.The method of separating plastic of present embodiment is applicable to the situation to carrying out sorting by difference in thickness by the plastics after breed difference sorting.First, the plastic Separator of present embodiment is described.
With reference to Fig. 2, plastic Separator 1 is the device for the charged plastics 2 of sorting.Below, the situation that the positively charged plastics 21 of the example as charged plastics 2 carry out sorting according to thickness is described, so plastics 2 comprise positively charged plastics 21.In addition, when carrying out sorting to electronegative plastics 22 according to thickness, plastics 2 comprise electronegative plastics 22.In addition, positively charged plastics 21 can be ABS resins.Now, the thickness of the thick plastics 21a in positively charged plastics 21 can be more than 2mm, and the thickness of thin plastics 21b can be below 1mm.
Plastic Separator 1 mainly has electrod assembly 3, returnable 4, first transfer unit 11, second transfer unit 12 and power supply 13.
First transfer unit 11 is the parts for carrying charged plastics 2.First transfer unit 11 is such as conveyer belt.Electrod assembly 3 is configured in the side of the first transfer unit 11, is configured to adsorbable positively charged plastics 21 at the opposite side of the first transfer unit 11.Electrod assembly 3 is configured to be surrounded by the first transfer unit 11.
Electrod assembly 3 is configured to can at the opposite side of the first transfer unit 11, and absorption has the thin plastics 21b of the electric charge mean value of more than a reference value between Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b being set in thick plastics 21a.
Electrod assembly 3 with can execute alive power supply 13 to electrod assembly 3 and be connected.Power supply 13 is arranged to the voltage that can apply more than a reference value.In order to sorting positively charged plastics 21, apply the voltage of negative electricity at electrod assembly 3 by power supply 13.
The positively charged plastics 21 that returnable 4 is arranged to can make to be adsorbed by the first transfer unit 11 come off from the first transfer unit 11 and reclaim.Returnable 4 is such as configured in the below of the first transfer unit 11, is configured to make the positively charged plastics 21 of the opposite side being adsorbed on the first transfer unit 11 fall from the first transfer unit 11 and reclaim by not shown scraper plate.
Second transfer unit 12 is the parts for carrying it with the state of loading with the thick plastics 21a of the thickness in the positively charged plastics 21 of identical polar electricity and the thin plastics 21b of thickness.Second transfer unit 12 is such as conveyer belt.
First transfer unit 11 is configured in the top of the second transfer unit 12.First transfer unit 11 is configured to mention and adsorbs the thin plastics 21b in the thick plastics 21a and thin plastics 21b carried by the second transfer unit 12.
In addition, the formation in addition of present embodiment because identical with above-mentioned embodiment 1, so, give identical Reference numeral to identical part, and do not repeat explanation.
Then, the method for separating plastic of the plastic Separator 1 using present embodiment is described.
With reference to Fig. 2, sorting is carried out to the plastics 2 by frictional electrification with identical polar electricity.These charged plastics 2 are positively charged plastics 21.These positively charged plastics 21 are applicable does not such as establish demarcation strip 4a and the positively charged plastics 21 reclaimed by ground side returnable 41 in embodiment 1.
Under the state that the plastics 21a that thickness in the positively charged plastics 21 of positively charged the is thick and thin plastics 21b of thickness is loaded in the second transfer unit 12, carried to arrow D2 direction in figure by the second transfer unit 12.
By applying voltage by power supply 13 on electrod assembly 3, the thin plastics 21b in thick plastics 21a and thin plastics 21b is mentioned by the first transfer unit 11 to the top being configured at the second transfer unit 12 and adsorbs.Now, thin plastics 21b is mentioned by the rightabout of electrod assembly 3 to gravity.
There is the thin plastics 21b of the electric charge mean value of more than a reference value between Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b being set in thick plastics 21a, also can be mentioned to the first transfer unit 11 and adsorb by electrod assembly 3.
Such as when positively charged plastics 21 are ABS resin, become 250kV/m by being applied voltage by power supply 13 pairs of electrod assemblies 3 to make the electric-field intensity in electrod assembly 3 direction on the second transfer unit 12, the ABS resin sheet of Unit Weight electric charge mean value of a reference value 40nC/g exceeding ABS resin sheet is mentioned to the first transfer unit 11 and adsorbed.
Therefore, thin plastics (ABS resin sheet) 21b that Unit Weight electric charge mean value is roughly 50nC/g is mentioned by the first transfer unit 11 and adsorbs.The thickness of these thin plastics (ABS resin sheet) 21b is below 1mm.For this reason, adsorbed by the first transfer unit 11 from thin plastics (ABS resin sheet) 21b extruding grade.
On the other hand, Unit Weight electric charge mean value is roughly thick plastics (ABS resin sheet) 21a of 20nC/g, does not mention and adsorbs to the first transfer unit 11, but is transferred under keeping being loaded in the state on the second transfer unit 12.The thickness of these thick plastics (ABS resin sheet) 21a is about 2mm.For this reason, thick plastics (ABS resin sheet) 21a from injection grade is not mentioned by the first transfer unit 11 and adsorbs, but is transferred being loaded under the state on the second transfer unit 12.
By the electrod assembly 3 of side being configured in the first transfer unit 11, adsorb thin plastics 21b at the opposite side of the first transfer unit 11.In this condition, thin plastics 21b is carried to arrow D1 direction in figure by the first transfer unit 11.The thin plastics 21b with the electric charge mean value of more than a reference value also can carry out the conveying formed by the first transfer unit 11 under the state of opposite side being adsorbed on the first transfer unit 11 by electrod assembly 3.
The thin plastics 21b adsorbed by the first transfer unit 11 comes off from the first transfer unit 11, is reclaimed by returnable 4.Thin plastics 21b is such as scraped by not shown scraper plate from the first transfer unit 11 and reclaims.Like this, thick plastics 21a stays the second transfer unit 12, and thin plastics 21b is reclaimed by returnable 4.Thus, can the thick plastics 21a of sorting and thin plastics 21b.
Then, the action effect of present embodiment is described.
According to the present embodiment, can the charged of positively charged plastics 21 be corresponded to, carry under state positively charged plastics 21 being adsorbed on the first transfer unit 11 by electrod assembly 3, make it come off from the first transfer unit 11 and reclaim.For this reason, the impact that the shape because of plastics 2 causes can be suppressed, by each thickness, sorting be carried out to plastics 2.
In addition, according to the present embodiment, charged plastics 2 can be carried by the first transfer unit 11 under the state being adsorbed on the first transfer unit 11 by electrod assembly 3, make it come off from the first transfer unit 11 and reclaim.That is, in the present embodiment, because the thickness not measuring plastics 2 is to carry out sorting, so, can separating plastic 2 in a large number.
In addition, according to the present embodiment, the thin plastics 21b in the thick plastics 21a carried by the second transfer unit 12 and thin plastics 21b is mentioned by electrod assembly 3 to the first transfer unit 11 be configured at above the second transfer unit 12 and adsorbs.
Now, thin plastics 21b is mentioned to the rightabout of gravity towards the first transfer unit 11 be configured in above the second transfer unit 12 by electrod assembly 3.Thick plastics 21a is because weight is large, so the rightabout be difficult to gravity is mentioned, and thin plastics 21b is because weight is little, so easily mention to the rightabout of gravity.For this reason, on the first transfer unit 11, easy realization is not mentioned thick plastics 21a and mentions the formation of thin plastics 21b.Thus, thin plastics 21b can be mentioned accurately on the first transfer unit 11.
In addition, according to the present embodiment, there is the thin plastics 21b of the electric charge mean value of more than a reference value between Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b being set in thick plastics 21a, carry under the state of opposite side being adsorbed on the first transfer unit 11 by electrod assembly 3.By the thin plastics 21b of the electric charge mean value with more than a reference value being adsorbed onto the first transfer unit 11 by electrod assembly 3, thin plastics 21b and thick plastics 21a sorting can being opened and carry.
In addition, according to the present embodiment, positively charged plastics 21 are ABS resins, and the thickness of the thick plastics 21a of positively charged plastics 21 is more than 2mm, and the thickness of thin plastics 21b is below 1mm.Thus, by sorting and reclaim more than thickness 2mm from the injection ABS resin sheet of grade and below thickness 1mm from the ABS resin sheet extruding grade, can again recycle in injection grade and the same use extruded in grade.
(embodiment 3)
The method of separating plastic of embodiments of the present invention 3 is compared with the method for separating plastic of embodiment 2, and mainly the configuration of the first transfer unit is different.The method of separating plastic of present embodiment is applicable to the situation to carrying out sorting by difference in thickness by the plastics after breed difference sorting.Below, the method for separating plastic of present embodiment is described.
With reference to Fig. 3, the second transfer unit 12 is configured to viewed from gravity direction not overlapping with the first transfer unit 11.From gravity direction, between the first transfer unit 11 and the second transfer unit 12, configure the space that charged plastics 2 can fall.First transfer unit 11 is configured to attract and adsorbs to be carried by the second transfer unit 12 and thin plastics 21b the thick plastics 21a fallen from the second transfer unit 12 and thin plastics 21b.
First transfer unit 11 is configured in throughput direction (in the figure arrow D2 direction) side of the second transfer unit 12 relative to the second transfer unit 12.First transfer unit 11 is inclined, becomes large to make the distance of itself and the second transfer unit 12 along the falling direction of charged plastics 2.The below being configured in the second transfer unit 12 at least partially of the opposite side of the first transfer unit 11.In the below configuration returnable 4 of the lower side of the opposite side of the first transfer unit 11.
The plastics 21a thick with the thickness in the positively charged plastics 21 of identical polar electricity and the thin plastics 21b of thickness is to be loaded into the state of the second transfer unit 12 to arrow D2 direction conveying in figure.When arrow D2 direction is transported to the end of the second transfer unit 12 to thick plastics 21a and thin plastics 21b in the drawings, thick plastics 21a and thin plastics 21b falls from the end of the second transfer unit 12.
After thick plastics 21a and thin plastics 21b falls from the end of the second transfer unit 12, thin plastics 21b is attracted by electrod assembly 3 to being configured to the first transfer unit 11 not overlapping with the second transfer unit 12 viewed from gravity direction and adsorbing.Now, thin plastics 21b drops to the space between the second transfer unit 12 and the first transfer unit 11, is attracted by the first transfer unit 11 simultaneously.
There is the thin plastics 21b of the electric charge mean value of more than a reference value between Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b being set in thick plastics 21a, also can be attracted to the first transfer unit 11 and adsorb by electrod assembly 3.
The thin plastics 21b adsorbed by the first transfer unit 11 comes off from the first transfer unit 11 and is reclaimed by returnable 4.On the other hand, thick plastics 21a is not adsorbed by the first transfer unit 11, and falls between the first transfer unit 11 and the second transfer unit 12.
In addition, the formation in addition of present embodiment and method, because identical with above-mentioned embodiment 2, so give identical Reference numeral to identical part, and do not repeat explanation.
According to the present embodiment, at thick plastics 21a and thin plastics 21b from the second transfer unit 12 backwardnesss, thin plastics 21a is attracted by electrod assembly to the first transfer unit 11 not overlapping with the second transfer unit 12 viewed from gravity direction and adsorbs.
Now, the space of thin plastics 21b between the second transfer unit 12 and the first transfer unit 11 falls, and is attracted by electrod assembly 3 to the first transfer unit 11 simultaneously.The amount of movement of the horizontal direction of thin plastics 21b is larger than the amount of movement of the horizontal direction of thick plastics 21a.For this reason, can easily realize not making thick plastics 21a adsorb to the first transfer unit 11 and make the formation that thin plastics 21b adsorbs.Thereby, it is possible to thin plastics 21b is adsorbed in the first transfer unit 11 accurately.
(embodiment 4)
The method of separating plastic of embodiments of the present invention 4 is compared with the method for separating plastic of embodiment 2, and main not being both does not have the second transfer unit this point.The method of separating plastic of present embodiment is applicable to the situation to carrying out sorting by difference in thickness by the plastics after breed difference sorting.Below, the method for separating plastic of present embodiment is described.
With reference to Fig. 4, plastic Separator 1 mainly has electrod assembly 3, returnable 4, first transfer unit 11 and power supply 13.
First transfer unit 11 is arranged to the side, two sides surrounding electrod assembly 3 continuously.First transfer unit 11 be configured to can upper surface side load by frictional electrification with the state of the positively charged plastics 21 of identical polar electricity under it is carried.First transfer unit 11 is arranged in an end, and when thick plastics 21a and thin plastics 21b is transported to lower face side from upper surface side, thick plastics 21a falls from upper surface side, and thin plastics 21a can carry under the state being adsorbed onto lower face side.Returnable 4 is configured in the below of the other end of the opposition side, an end of the first transfer unit 11.
Positively charged plastics 21 are loaded into the upper surface side of the first transfer unit 11.The plastics 21a thick with the thickness of the positively charged plastics 21 of identical polar electricity and the thin plastics 21b of thickness is carried towards an end in arrow D1 direction in the drawings by the first transfer unit 11 under the state being loaded into the first transfer unit 11 upper surface side.
In an end of the first transfer unit 11, when thick plastics 21a and thin plastics 21b is transported to lower face side from upper surface side, thick plastics 21a falls from upper surface side.Thin plastics 21b under the state of lower face side being adsorbed onto the first transfer unit 11 by electrod assembly 3 by the first transfer unit 11 in the drawings arrow D2 carry towards the other end in direction.
There is the thin plastics 21b of the electric charge mean value of more than a reference value between Unit Weight electric charge mean value and the Unit Weight electric charge mean value of thin plastics 21b being set in thick plastics 21a, also can be adsorbed on the lower face side of the first transfer unit 11 by electrod assembly 3.
The thin absorption 21b being adsorbed on the lower face side of the first transfer unit comes off from the lower face side of the first transfer unit 11 in the other end and is reclaimed by returnable 4.
In addition, the formation in addition of present embodiment, because identical with above-mentioned embodiment 2, so give identical Reference numeral to identical part, and does not repeat explanation.
According to the present embodiment, thick plastics 21a and thin plastics 21b is transferred under the state of upper surface side being loaded into the first transfer unit 11, when being transported to lower face side from upper surface side, thick plastics 21a falls from upper surface side, and thin plastics 21b is to be adsorbed on the state conveying of lower face side.
When positively charged plastics 21 are transported to lower face side from the upper surface side of the first transfer unit 11, the thick plastics 21a that weight is large falls from upper surface side, and the thin plastics 21b that weight is little is adsorbed on the lower face side of the first transfer unit 11.For this reason, can easily realize not adsorbing thick plastics 21a in the lower face side of the first transfer unit 11 and adsorbing the formation of thin plastics 21b.Thus, the first transfer unit 11 high accuracy can adsorb thin plastics 21b.
In addition, because carrying thick plastics 21a and thin plastics 21b by the first transfer unit 11, and can the thick plastics 21a of sorting and thin plastics 21b, the other transfer unit for carrying thick plastics 21a and thin plastics 21b also can not be set, so, can realize saving space.In addition, because other transfer unit can not be arranged, so, the productivity ratio comprising production cost can be improved.
(embodiment 5)
The method of separating plastic of embodiments of the present invention 5 is compared with the method for separating plastic of embodiment 1, and main is not both charged plastics, returnable and Charging system.The method of separating plastic of present embodiment is applicable to the situation to carrying out sorting by difference in thickness by the plastics after breed difference sorting.Below, the method for separating plastic of present embodiment is described.
With reference to Fig. 5, the charged plastics 2 of present embodiment are different from embodiment 1, are the one of positively charged plastics 21.Below, be described according to the situation of thickness sorting positively charged plastics 21, but also can according to the electronegative plastics 22 of thickness sorting.Now, charged plastics 2 become electronegative plastics 22.
Returnable 4 is ground side returnable 41 of recyclable positively charged plastics 21.Returnable 4 (ground side returnable 41) has the demarcation strip 4a separating a region 4b of recyclable thick plastics 21a and another region 4c of recyclable thin plastics 21b.A region 4b of returnable 4 is configured at positive electrode 3b side in the below of fall area 7.Another region 4c of returnable 4 is configured at earth electrode 3a side in the below of fall area 7.
Charging system 51 is by by the friction of plastics 2 from input, the material with the polarity electricity different with plastics 2 is formed.In the present embodiment, because charged plastics 2 are positively charged plastics 21, so Charging system 51 is by by the friction with positively charged plastics 21, electronegative material is formed.Charging system 51 is configured to positively charged plastics 21 to be supplied to fall area 7.
By rotating in direction to arrow R1 in figure and stir positively charged plastics 21 in Charging system 51, Charging system 51 and positively charged plastics 21 rub.Rubbed by Charging system 51 and positively charged plastics 21, Charging system 51 is electronegative.The positively charged plastics 21 of positively charged pass through and are supplied to fall area 7 on transfer unit 6.
The whereabouts orbit transfer of the charged positively charged plastics 21 fallen in fall area 7 is made by earth electrode 3a and positive electrode 3b.Thick plastics 21a in the positively charged plastics 21 of whereabouts orbit transfer is reclaimed by a region 4b of returnable 4 (ground side returnable 41), and thin plastics 21b is reclaimed by another region 4c of returnable 4 (ground side returnable 41).
Then, an example of the method for separating plastic of present embodiment is described in detail.
When positively charged plastics 21 are ABS resins, Charging system 51 can be made up of PS resin or PP resin.Now, when positively charged plastics 21 to be put in Charging system 51 and to be stirred, the inwall of Charging system 51 becomes friction media, positively charged plastics 21 positively charged be made up of ABS resin.
The positively charged plastics 21 be made up of ABS resin are supplied to fall area 7 from Charging system 51 via transfer unit 6.Positively charged plastics 21 receive electrostatic force by earth electrode 3a and positive electrode 3b and are reclaimed by returnable 4 in way, the whereabouts of fall area 7.It is corresponding with Unit Weight charge reference value 40nC/g by the position of demarcation strip 4a is adjusted to, same with embodiment 1, positively charged plastics 21 can divide elect as thickness about 2mm from the injection ABS resin sheet of grade and below thickness 1mm from the ABS resin sheet extruding grade.
In addition, the formation in addition of present embodiment and method, because identical with above-mentioned embodiment 1, so give identical Reference numeral to identical part, and do not repeat explanation.
According to the present embodiment, because make Charging system 51 and plastics 2 rub, make plastics 2 with the electricity with Charging system 51 opposed polarity, so, after carrying out electrostatic separation by kind, chargedly by the plastics 2 making the quantity of electric charge decay can carry out sorting by each thickness.In addition, also can be charged to the plastics 2 having carried out sorting by kind by the method beyond electrostatic separation, carry out sorting by each thickness.
(embodiment 6)
The method of separating plastic of embodiments of the present invention 6, compared with the method for separating plastic of embodiment 2, mainly has difference in Charging system this point.
With reference to Fig. 6, Charging system 51 is formed with the material with plastics 2 opposed polarity electricity by by rubbing with the plastics 2 dropped into.In the present embodiment, because charged plastics 2 are positively charged plastics 21, so Charging system 51 is by by rubbing with positively charged plastics 21, electronegative material is formed.Charging system 51 is configured to positively charged plastics 21 to be supplied to the second transfer unit 12.
By rotating in direction to arrow R1 in figure and stir positively charged plastics 21 in Charging system 51, Charging system 51 and positively charged plastics 21 rub.Rubbed by Charging system 51 and positively charged plastics 21, Charging system 51 is electronegative.The positively charged plastics 21 of positively charged are supplied to the second transfer unit 12 from Charging system 51.
Then, an example of the method for separating plastic of present embodiment is described in detail.
When positively charged plastics 21 are ABS resins, Charging system 51 can be made up of PS resin or PP resin.When being dropped into by positively charged plastics 21 in Charging system 51 and stir, the inwall of Charging system 51 becomes friction media, positively charged plastics 21 positively charged be made up of ABS resin.The positively charged plastics 21 be made up of ABS resin are supplied to the second transfer unit 12 from Charging system 51.Positively charged plastics 21 are carried to arrow D2 direction in figure by the second transfer unit 12 under the state being loaded into the second transfer unit 12.
By applying voltage with power supply 13 pairs of electrod assemblies 3,250kV/m is become to make the electric-field intensity in electrod assembly 3 direction on the second transfer unit 12, the ABS resin sheet of the Unit Weight electric charge mean value exceeding a reference value 40nC/g of ABS resin sheet is mentioned to the first transfer unit 11 and adsorbed, carries under the state being attached at the first transfer unit 11 and be recovered to returnable 4.Like this, positively charged plastics 21 can divide elect as thickness about 2mm from the injection ABS resin sheet of grade and below thickness 1mm from the ABS resin sheet extruding grade.
In addition, the formation in addition of present embodiment and method, because identical with above-mentioned embodiment 2, so give identical Reference numeral to identical part, and do not repeat explanation.
According to the present embodiment, because make Charging system 51 and plastics 2 rub, make plastics 2 with the electricity with Charging system 51 opposed polarity, so after having carried out electrostatic separation by kind, the plastics 2 that the quantity of electric charge can be made to decay are charged carries out sorting by each thickness.In addition, also can be charged to the plastics 2 having carried out sorting by kind by the method beyond electrostatic separation, carry out sorting by each thickness.
(embodiment 7)
The method of separating plastic of embodiments of the present invention 7, compared with the method for separating plastic of embodiment 3, mainly has difference in Charging system this point.This Charging system is identical with the Charging system of embodiment 6.
With reference to Fig. 7, according to the present embodiment, make Charging system 51 and plastics 2 rub because same with embodiment 6, make plastics 2 with the electricity with Charging system 51 opposed polarity, so, after having carried out electrostatic separation by kind, can be charged by the plastics 2 making the quantity of electric charge decay, carry out sorting by each thickness.In addition, also can be charged to the plastics 2 having carried out sorting by kind by the method beyond electrostatic separation, carry out sorting by each thickness.
(embodiment 8)
The method of separating plastic of embodiments of the present invention 8, compared with the method for separating plastic of embodiment 4, mainly has difference in Charging system this point.This Charging system is identical with the Charging system of embodiment 6.
With reference to Fig. 8, by rotating in direction to arrow R1 in figure and stir positively charged plastics 21 in Charging system 51, Charging system 51 and positively charged plastics 21 rub.Rubbed by Charging system 51 and positively charged plastics 21, the positively charged plastics 21 of positively charged are supplied to the upper surface side of the first transfer unit 11 from Charging system 51.
According to the present embodiment, make because same with embodiment 6 Charging system 51 and plastics 2 rub, make plastics 2 with the electricity with Charging system 51 opposed polarity, so, after having carried out electrostatic separation by kind, can be charged by the plastics 2 making the quantity of electric charge decay, carry out sorting by each thickness.In addition, also can be charged to the plastics 2 having carried out sorting by kind by the method beyond electrostatic separation, carry out sorting by each thickness.
Above-mentioned each embodiment can suitably be combined.
Represent invention has been detailed description, but this being example, can not restriction being become, should be expressly understood that scope of invention is explained by claims.
Claims (13)
1. a method of separating plastic, for the congener plastics of sorting with identical polar electricity, is characterized in that possessing following operation:
The plastics of more than described a reference value and the plastics of the described a reference value of deficiency are separated, between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of the plastics that the thickness of this reference value in Charging system friction in charged described plastics is thick and the thin plastics of thickness based on a reference value.
2. method of separating plastic as claimed in claim 1, is characterized in that possessing following operation:
By with at least one electrod assembly for making faced by the described fall area fallen with the congener plastics of identical polar electricity, change the whereabouts track of the described plastics fallen in described fall area;
By plastics thick for described thickness and the thin plastics recovery of described thickness to returnable, this returnable is configured at the below of described fall area and is provided with based on a recovery zone of described reference value and another recovery zone, now, reclaim the plastics of more than described a reference value in another recovery zone described in described returnable, reclaim the plastics of not enough described a reference value in a described recovery zone.
3. method of separating plastic as claimed in claim 2, is characterized in that, and then possess following operation:
Make described Charging system and described plastic friction, this Charging system, by by forming with the material with described plastics opposed polarity electricity with the congener plastic friction of identical polar electricity with described, is supplied to described fall area by with the described plastics with described Charging system opposed polarity electricity.
4. method of separating plastic as claimed in claim 1, is characterized in that possessing following operation:
At the side of transfer unit configuration electrod assembly, carry the described congener plastics with identical polar electricity at the opposite side of described transfer unit with the described transfer unit of the state of being adsorbed by described electrod assembly;
The side in the plastics of the plastics of more than described a reference value or not enough described a reference value is made to come off from described transfer unit and reclaim it.
5. method of separating plastic as claimed in claim 1, is characterized in that possessing following operation:
The described congener plastics with identical polar electricity are carried by transfer unit;
The side in the plastics of more than described a reference value or the plastics of not enough described a reference value is adsorbed by the electrod assembly be configured in above described transfer unit.
6. the method for separating plastic as described in claim 4 or 5, is characterized in that, and then possesses following operation:
Make described Charging system and described plastic friction, this Charging system, by by forming with the material with described plastics opposed polarity electricity with described plastic friction, is supplied to described transfer unit by with the described plastics with described Charging system opposed polarity electricity.
7. method of separating plastic as claimed in claim 1, it is characterized in that, described plastics are ABS resins,
The thickness of described thick plastics is more than 2mm,
The thickness of described thin plastics is below 1mm.
8. a plastic Separator, for the congener plastics of sorting with identical polar electricity, is characterized in that possessing:
At least one electrod assembly, this electrod assembly with for making with faced by Charging system friction and fall area that charged described plastics fall; With
Returnable, this returnable is configured in the below of described fall area and has demarcation strip, this divides is based on a region of reference value position and another region, between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of the plastics that the thickness of this reference value in described plastics is thick and the thin plastics of thickness, and, this returnable can by with the plastics recovery more than described a reference value in the described plastics of identical polar electricity in another region described, by the plastics recovery of described for deficiency a reference value in a described region.
9. plastic Separator as claimed in claim 8, is characterized in that also possessing described Charging system, this Charging system by by with described plastic friction and forming with the material with described plastics opposed polarity electricity;
Described Charging system is configured to, can by by being supplied to described fall area with described plastic friction with the described plastics with described Charging system opposed polarity electricity.
10. a plastic Separator, for the congener plastics of sorting with identical polar electricity, is characterized in that possessing:
Transfer unit, this transfer unit is for carrying with Charging system friction and charged described plastics;
Electrod assembly, this electrod assembly is configured in the side of described transfer unit, can by the opposite side of charged described plastic adherence at described transfer unit; With
Returnable, this returnable can make the side be attracted in the plastics of more than a reference value among the described plastics on described transfer unit or the plastics of not enough described a reference value come off from described transfer unit, and reclaim, between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of the plastics that the thickness of this reference value in described plastics is thick and the thin plastics of thickness.
11. 1 kinds of plastic Separators, for the congener plastics of sorting with identical polar electricity, it is characterized in that, possess transfer unit and electrod assembly, this electrod assembly is configured in the top of described transfer unit, to be adsorbed on described transfer unit conveying and with Charging system friction and a reference value among charged described plastics more than plastics or not enough described a reference value plastics in a side, between the Unit Weight electric charge mean value of the Unit Weight electric charge mean value of the plastics that the thickness of this reference value in described plastics is thick and the thin plastics of thickness.
12. plastic Separators as described in claim 10 or 11, is characterized in that also possessing described Charging system, and this Charging system is by by forming with the material with described plastics opposed polarity electricity with described plastic friction;
Described Charging system is configured to, can by by being supplied to described transfer unit with described plastic friction with the described plastics with described Charging system opposed polarity electricity.
13. plastic Separators according to any one of claim 8 ~ 11, it is characterized in that, described plastics are ABS resins,
The thickness of described thick plastics is more than 2mm,
The thickness of described thin plastics is below 1mm.
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| JP2010263314A JP5412409B2 (en) | 2010-11-26 | 2010-11-26 | Plastic sorting method and plastic sorting apparatus |
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| CN102728474B (en) * | 2012-06-29 | 2015-04-08 | 武汉理工大学 | Identification and separation device and method for waste plastics |
| KR101530003B1 (en) * | 2013-11-20 | 2015-06-18 | 한국지질자원연구원 | Triboelectrostatic technique for material separation of ABS and PS mixed plastic |
| CN111036409B (en) * | 2020-02-09 | 2021-09-28 | 羽源洋(宁波)科技有限公司 | Garbage separating device capable of realizing density sorting treatment of plastic garbage |
| CN111113728B (en) * | 2020-02-09 | 2022-01-21 | 广东星鑫环保资源开发有限公司 | Garbage classification method capable of realizing density sorting treatment of plastic garbage |
| CN111822151B (en) * | 2020-05-21 | 2021-11-16 | 浙江大学 | System and method for analyzing growth morphology of polyethylene by using static electricity |
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| JP5412409B2 (en) | 2014-02-12 |
| JP2012110855A (en) | 2012-06-14 |
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