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CN103707436A - Method for recycling waste hard plastics based on charged attenuation sorting - Google Patents

Method for recycling waste hard plastics based on charged attenuation sorting Download PDF

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Publication number
CN103707436A
CN103707436A CN201310695084.0A CN201310695084A CN103707436A CN 103707436 A CN103707436 A CN 103707436A CN 201310695084 A CN201310695084 A CN 201310695084A CN 103707436 A CN103707436 A CN 103707436A
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waste
plastic particles
sorting
charge
hard plastics
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李佳
许振明
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Shanghai Jiao Tong University
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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

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Abstract

本发明公开了一种基于荷电衰减分选的废旧硬质塑料的回收利用方法，该方法包括：对废旧塑料进行辊压式机械破碎、对破碎的颗粒进一步粉碎、将混合颗粒电晕荷电以及进行荷电衰减分离四个工序。本发明具有成本低、高效、结构简单、无污染等特点，减少环境污染；无需废旧塑料识别工序，处理量高，易于工业应用。

Figure 201310695084

The invention discloses a method for recycling waste and old hard plastics based on charge attenuation sorting. The method includes: performing rolling mechanical crushing on waste plastics, further crushing the crushed particles, and corona charging the mixed particles. And carry out four processes of charge decay and separation. The invention has the characteristics of low cost, high efficiency, simple structure, no pollution, etc., reduces environmental pollution, does not need waste plastic identification process, has high processing capacity, and is easy for industrial application.

Figure 201310695084

Description

The recoverying and utilizing method of the waste and old rigid plastics based on charged decay sorting
Technical field
The present invention relates to that trade waste in environmental protection technical field is processed, resource field, particularly, relate to the broken and charged decay method for separating of multiple waste and old rigid plastics, be to waste or used plastics reclaim, the method for regeneration and resource.
Background technology
Since nearly half a century, plastics are widely applied because of its cheapness, the characteristic such as safe, durable and light in every profession and trade, and the plastics consumption in the world also constantly raises fast.It is reported, in past 20 years, the average plastics annual production increasing degree in the whole world had approached 200,000,000 7,000 ten thousand tons over the plastics output in 5%, the 2010 year whole world, and the demand of plastics is still constantly soaring.Although plastic products have higher durability degree, still have every year a large amount of plastics to be discarded.Data show, in Gary solid waste, the shared ratio of waste or used plastics from 1994 9.5% rise to 2010 12.4%.
The molecular structure of waste or used plastics goods is firm, and under natural conditions, decomposition rate is very slow.As polyethylene (polyethylene, PE) polyvinyl chloride (polyvinylchloride, PVC) in soil, about 300-400 could be degradable, prolonged stay has destroyed the gas permeability of soil in soil, reduce the water-holding capacity of soil, affected the moisture of crops, the absorption of nutrient, hindered the growth of seedlings of cereal crops root systems, can cause the significantly underproduction of crops, make to plough deteriorated.In addition the heavy metal ion in plastic additive and noxious material can spread, permeate in soil, directly affect groundwater quality and plant growth.The harm that plastic refuse causes marine organisms is 4 times of oil spill and leakage harmfulness, be often only be discarded in ocean discarded fishing gear just more than 150,000 tons, various plastic waste materials are more than millions of tons.According to statistics, in annual Global Oil output, approximately have 4% can be used to produce plastic raw materials, separately have 4% fuel that can be used as producing plastic expansion product.Petroleum resources are limited, and China Shi Yige oil consumption big country.Net importation amount to China's oil in 2011 is 2.51 hundred million tons, becomes the large net import of oil of the first in the world state.Demand is surged and is caused oil price to rise suddenly and sharply, and plastics industry has been brought to very large disparities between supply and demand and impact.
The recycling processing method of waste or used plastics mainly contains chemical method and Physical at present.Mechanical approach is easily realized through engineering approaches, can't produce secondary pollution, and this method enjoys great popularity.
Through retrieval, Chinese invention patent < < waste or used plastics recycling processing method and equipment > > (bright fruit English etc., the patent No. 201210228475.7), a kind of waste or used plastics recycling processing method and equipment are provided, equipment comprises cracking and sorting treatment system and cleans separation process system, cracking and sorting treatment system comprises two-stage raw material conveyer belt, two stage crusher, magnetic separator, two-stage broken material conveyer belt, clean separation process system and comprise Rinsing Area, jetsam conveyer belt, saline slot, spiral discharging machine, and auger conveyor, buoyant elevator, the inventive method is comprised of with separated two step process of cleaning cracking and sorting.Cracking and sorting technique is comprised of manual sorting, one-level fragmentation, magnetic separation, two-stage crushing step successively, and the liquid of cleaning separating technology employing clear water and two kinds of different densities of salt solution just each component separation of waste or used plastics comes.The present invention have good separating effect, resource recovery high, do not produce the features such as secondary pollution.The manual selection of waste or used plastics, two-stage fragmentation, magnetic separation, clear water flotation, the separation process of brine floatage, although the present invention can realize the separation of mixed plastic, whole assorting room is loaded down with trivial details; In method, the material of all fragmentations is adopted to tank, saline slot is carried out difference in specific gravity sorting, between density range due to many plastics, have overlapping or characteristic density is very close (as the characteristic density of PVC and PET is respectively 1.39gcm-3 and 1.37gcm-3), therefore the simple density variation efficiency of separation that relies on is low, product needed dehydration, dry, and exist environmental pollution improvement's problems such as mud and wastewater treatment.
The high-voltage electrostatic separation method > > (Fan Hongjie etc. of Chinese invention patent < < recycled plastics in waste electronic apparatus, patent No. 201110120653.X), the present invention relates to the isolation and purification method of plastics in a kind of waste and old electric electrical equipment, in the friction cyclone with PET material, stir and realize phase mutual friction, make plastics by frictional electrification, different according to plastic friction chargeding performance, the plastics of frictional electrification are contacted and are provided high-voltage electrostatic field with rotary electrode, compound action due to centrifugal force and electrostatic force, from rotary electrode, to throw away the plastic grain falling to present different tracks and produce certain distance because current potential is different, with the container with positive plate, carry out categorised collection, thereby realize sorting and the purifying of variety classes plastics, final recovery obtains with PS, PP, ABS, PVC etc. are main single component thermoplastic grain products purity 95%.This invention waste and old electric electrical equipment fragmentation, magnetic separation, eddy current electric separation, circulation fragmentation, suspension selection by winnowing, high-voltage electrostatic sorting obtain one-component plastics, and whole assorting room is loaded down with trivial details; The selection by winnowing that suspends in method cannot be by the close plastics separation of density, and friction cyclone and electrostatic separator structure are described unclear.
Chinese invention patent < < waste or used plastics identification and separator and method > > (Hua Lin etc., the patent No. 201210220498.3), a kind of waste or used plastics identification and separator are provided, comprise breaker, rubbing device, accelerator, stationary magnetic field device, comparison means and gathering-device; The pure plastics of various standards or waste or used plastics are charged by rubbing device after breaker fragmentation, after charged, entering accelerator accelerates, then to be greater than zero identical speed with the angle of magnetic direction, enter stationary magnetic field, form different movement locus, comparison means compares the movement locus of the movement locus of waste or used plastics particle and the pure plastic grain of various standards, thereby determines in waste or used plastics identical with the pure plastics kind of the standard with it with same motion trajectory.Gathering-device is collected in the waste or used plastics particle that in magnetic field, movement locus is close.The present invention also provides a kind of waste or used plastics identification and separation method.This patent need adopt the pure plastics of standard and band to select materials to carry out track contrast, thereby determines in waste or used plastics identically with its pure plastics kind of standard with same motion trajectory, identifies with separated; Gathering-device is collected in the waste or used plastics particle that in magnetic field, movement locus is close; Complex process, identification is high with separating difficulty, and treating capacity is low, is difficult to commercial Application.
Fragmentation and the charged decay method for separating of the waste and old rigid plastics that the present invention adopts, utilize the different characteristic of the charged attenuation rate of plastic grain to realize sorting, and technological process is simple, applied widely, and without recognizer, treating capacity is high, is easy to commercial Application.And the feature such as pollution-free, reduces environmental pollution.
Summary of the invention
For defect of the prior art, the fragmentation and the charged decay method for separating that the object of this invention is to provide a kind of waste and old rigid plastics, the method is carried out effective fragmentation and separation and concentration by mixed plastic, realizes the recovery of waste or used plastics, regeneration and recycling treatment.
For realizing above object, technical solution of the present invention is as follows:
A kind of recoverying and utilizing method of the waste and old rigid plastics based on charged decay sorting, its feature is, the method comprises: to waste or used plastics carry out roller press type Mechanical Crushing, to broken particle further pulverize, by hybrid particles corona charging and carry out separated four steps of charged decay, concrete:
Step 1, through conveyer belt, waste and old rigid plastics is broken into the fragment that granularity is 3mm-5mm by kibbler roll;
Step 2, through conveyer belt by broken fragment by being transported to middling speed impact grinder, be further ground into the plastic grain that granularity is 0.8mm-2mm;
Step 3, pulverized plastic grain is sent on grounding guide by feeder uniformly, plastic grain moves to corona charging district with the metal belt of grounding guide, connected with thread corona discharge electrode by the column stationary electrode with grounding guide axially parallel and connect and compose with negative pole high voltage source in corona charging district, the anion bombardment producing by corona electrode makes plastic grain electronegative;
Step 4, plastic grain after charged contacts with grounding guide, metal belt with grounding guide moves to static place, static place is to comprise separate roller, this separate roller is connected with positive EHT supply by the first brush, make to form electrostatic field between grounding guide and separate roller, under the effect of electrostatic attraction, retaining the large plastic grain of the quantity of electric charge is taken away grounding guide and is adsorbed on separate roller, with separate roller, move and fall into large charge collection of products district through hairbrush brush, retain the plastic grain that the quantity of electric charge is little and fall into little electric charge collection of products district with grounding guide motion, intermediate plastic grain falls into midbody product collecting region after being taken away grounding guide.
Also comprise step 5, the intermediate plastic grain that falls into intermediate product collecting region is sent into described feeder via conveyer belt.
In step 1, the space width of described oppositely rolling roller crusher is 3mm.
In step 2, the rotating speed of described middling speed impact grinder is less than or equal to 700 revs/min.Preferably, in step 1 and step 2, according to the kind of waste or used plastics and the broken granularity requirements of needs, determine the technological parameter of oppositely rolling roller crusher and high speed impact pulverizer, described oppositely rolling roller crusher space width is 3mm, and the rotating speed of described middling speed impact grinder is 700 revs/min and following.
Operation principle of the present invention: sent into uniformly on grounding guide by feeder by the mixed plastic particles after pulverizing, plastic grain moves to corona charging district with grounding guide, the electrode mechanism that corona charging district is composed in series by column stationary electrode and the thread corona discharge electrode of axially parallel produces, corona electrode connects negative pole high voltage source, and the anion producing by corona electrode bombardment makes pan feeding particle all electronegative.Particle after charged contacts with grounding guide, the charged attenuation rate of different material particles is different, within identical die-away time, retain quantity of electric charge difference, grounding guide end configures charged decay separate roller, separate roller connects positive EHT supply, between grounding guide and separate roller, form electrostatic field, under the effect of electrostatic attraction, retaining the large particle of the quantity of electric charge is taken away grounding guide and is adsorbed on separate roller, with separate roller, move and fallen into large charge product-collecting district by hairbrush brush, retain the particle that the quantity of electric charge is little and fall into little electric charge product-collecting district with grounding guide motion, and intermediate material is taken away grounding guide and be not adsorbed onto and on separate roller, fall into intermediate product collecting region.Intermediate product is sent into feeder cyclically charging by conveyer belt.
Compared with prior art, the present invention has following beneficial effect:
The present invention is based on density contrast wet concentration, wind-force flotation ratio after the complicated fragmentation of recoverying and utilizing method and multistep of waste and old rigid plastics of charged decay sorting, there is the features such as cost is low, efficient, simple in structure, pollution-free, reduce environmental pollution.
Accompanying drawing explanation
Fig. 1 is the flow chart of the inventive method;
Fig. 2 is charged decay sorting unit schematic diagram in the present invention;
Fig. 3 realizes the charged decay sorting unit structural representation of realizing charged decay sorting in the inventive method;
In figure, 1 is feeder, and 2 is grounding guide, 3 is column stationary electrode, and 4 is thread corona discharge electrode, and 5 is charged decay sorting roller, 6 is hairbrush, and 7 is large charge collection of products groove, and 8 is little electric charge collection of products groove, 9 is intermediate feeder, and 10 is insulator frame, and 11 is horizontal concrete chute, 12 is tip chute, and 13 is arc chute, and 14 is tip chute, 15 is the first brush, and 16 is the second brush, and 17 is vibrating feeder (conveyer);
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.。
As shown in Figure 1, the present embodiment provides broken and charged decay method for separating, adopt oppositely rolling roller crusher-middling speed pulverizings-corona charging-charged decay method for separating, comprising: to waste or used plastics carry out roller press type Mechanical Crushing, to broken particle further pulverize, by hybrid particles corona charging and carry out four operations of charged decay separation; Concrete:
Step 1, first with conveyer belt, waste or used plastics product is transported to oppositely rolling roller crusher, waste or used plastics is broken into the fragment that granularity is 3mm-5mm;
Step 2, adopt the waste and old plastic fragment that conveyer belt is 3mm-5mm granularity to be transported to middling speed impact grinder again, further waste or used plastics is ground into the plastic grain of 0.8mm-2mm;
Step 3, pulverized plastic grain is sent on grounding guide by feeder uniformly, plastic grain moves to corona charging district with grounding guide, the electrode mechanism that corona charging district is composed in series by column stationary electrode and the thread corona discharge electrode of axially parallel produces, corona electrode connects negative pole high voltage source, and the anion producing by corona electrode bombardment makes pan feeding particle all electronegative.
Step 4, particle after charged contacts with grounding guide, the charged attenuation rate of different material particles is different, within identical die-away time, retain quantity of electric charge difference, grounding guide end configures charged decay separate roller, separate roller connects positive EHT supply, between grounding guide and separate roller, form electrostatic field, under the effect of electrostatic attraction, retaining the large particle of the quantity of electric charge is taken away grounding guide and is adsorbed on separate roller, with separate roller, move and fallen into large charge product-collecting district by hairbrush brush, retain the particle that the quantity of electric charge is little and fall into little electric charge product-collecting district with grounding guide motion, and intermediate material is taken away grounding guide, be not adsorbed onto and on separate roller, fall into intermediate product collecting region.Intermediate product is sent into feeder cyclically charging by conveyer belt.
Described in the present embodiment, corona charging guide rail is by grounded metal guide rail, cylindric stationary electrode, and thread corona discharge electrode, negative pole high voltage source forms.Grounding guide surface is smooth metal belt, and material, with metal belt movement, enters corona charging district.The electrode mechanism that corona charging district is composed in series by column stationary electrode and the thread corona discharge electrode of axially parallel produces, and the anion bombardment producing by corona electrode makes pan feeding particle all electronegative.
The charged decay method for separating that the present embodiment adopts as shown in Figure 2, first by the mixed plastic particles after pulverizing, by feeder 1, sent into uniformly on grounding guide 2, plastic grain moves to corona charging district with grounding guide 2, corona charging district is produced with the electrode mechanism that thread corona discharge electrode 4 is composed in series by the column stationary electrode 3 of axially parallel, corona electrode 4 connects negative pole high voltage source, and the anion producing by corona electrode 4 bombardment makes pan feeding particle all electronegative.Particle after charged contacts with grounding guide 2, the charged attenuation rate of different material particles is different, within identical die-away time, retain quantity of electric charge difference, grounding guide 2 ends configure charged decay separate roller 5, separate roller 5 connects positive EHT supply, between grounding guide 2 and separate roller 5, form electrostatic field, under the effect of electrostatic attraction, retaining the large particle of the quantity of electric charge is taken away grounding guide 2 and is adsorbed on separate roller 5, with separate roller 5, move and fallen into large charge product-collecting district 7 by hairbrush 6 brushes, retain the particle that the quantity of electric charge is little and fall into little electric charge product-collecting district 8 with grounding guide 2 motions, and intermediate material is taken away grounding guide 2 and be not adsorbed onto and on separate roller, fall into intermediate product collecting region 9.Intermediate product is sent into feeder cyclically charging by conveyer belt.
Realize the device concrete structure of charged decay sorting in the inventive method as shown in Figure 3, comprise grounding guide, corona charging device and charged decay sorting roller device, concrete:
Described grounding guide 2 surfaces are the covering of smooth metal belt, and metal belt is grounded connection by the second brush 16.Grounding guide both sides surround frame structure by insulation board 10, horizontal concrete chute 11, tip chute 12 are set for regulating the position of corona charging device and the position of charged decay sorting roller device on insulation board 10.Grounding guide afterbody below arranges little electric charge collection of products groove 8, and the outer side-lower of grounding guide afterbody arranges midbody product feeder 9;
Described corona charging device comprises cylindric stationary electrode 3, thread corona discharge electrode 4, wherein: cylindric stationary electrode 3 be placed on grounding guide 2 middle part tops parallel with thread corona electrode 4, cylindric stationary electrode 3 is connected negative pole high voltage source with thread corona discharge electrode 4, and corona charging setting position is controlled adjustable within the specific limits by horizontal concrete chute 11 and tip chute 12.
Described charged decay sorting roller device comprises charged decay sorting roller 5, hairbrush 6, large charge feeder 7, wherein: charged decay sorting roller 5 surfaces are connected with positive EHT supply for conducting metal material and by the first brush 15, sorting roller 5 is arranged on grounding guide afterbody top, sorting roller 5 the right sides arrange hairbrush 6, hairbrush 6 belows arrange large charge collection of products groove 7, and sorting roller 5 positions are controlled adjustable within the specific limits by arc chute 13 and tip chute 14.
The installation composition closed system of oppositely rolling roller crusher of the present invention, middling speed impact grinder and charged decay sorting, adopts conveyer belt to carry out the conveying of material between system, whole system is carried out under air-proof condition, and three-waste free discharge reduces environmental pollution.
The present invention compares with photometric sorting with density separation that to have treating capacity high, is easy to commercial Application, the feature such as cost is low, efficient, simple in structure, pollution-free.
In the present embodiment, on column stationary electrode 3, thread corona electrode 4, be provided with adjusting chute, in order to regulate electrode and distance grounding guide 2.
In the present embodiment, charged decay separate roller 5 angle 0-90 degree are adjustable.
In the present embodiment, all electrode application voltage are 5kV – 60kV, and electric current is 2mA – 5mA.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.

Claims (4)

1.一种基于荷电衰减分选的废旧硬质塑料的回收利用方法，其特征在于，该方法包括：对废旧塑料进行辊压式机械破碎、对破碎的颗粒进一步粉碎、将混合颗粒电晕荷电以及进行荷电衰减分离四个步骤，具体的：1. A method for recycling waste and old hard plastics based on charge decay sorting, characterized in that the method comprises: carrying out rolling mechanical crushing of waste and old plastics, further pulverizing the broken particles, corona mixing the particles There are four steps for charging and charge decay separation, specifically: 步骤一、经传送带将废旧硬质塑料通过辊式破碎机破碎成粒度为3mm-5mm的碎片；Step 1. Crushing waste and old hard plastics into fragments with a particle size of 3mm-5mm through a roller crusher through a conveyor belt; 步骤二、经传送带将破碎的碎片通过输送到中速冲击粉碎机，进一步粉碎成粒度为0.8mm-2mm的塑料颗粒；Step 2. The broken fragments are conveyed to a medium-speed impact crusher through the conveyor belt, and further crushed into plastic particles with a particle size of 0.8mm-2mm; 步骤三、将被粉碎的塑料颗粒由喂料器均匀的送入接地导轨上，塑料颗粒随接地导轨的金属皮带运动到电晕荷电区，电晕荷电区由与接地导轨轴向平行的柱状静电极与丝状电晕极串联并与负极高压电源连接构成，通过电晕电极所产生的负离子轰击而使塑料颗粒带负电荷；Step 3: Send the pulverized plastic particles evenly to the grounding guide rail by the feeder, and the plastic particles move to the corona charging area along with the metal belt of the grounding guide rail. The columnar static electrode is connected in series with the filamentary corona electrode and connected to the negative high-voltage power supply, and the plastic particles are negatively charged by the negative ion bombardment generated by the corona electrode; 步骤四、荷电后的塑料颗粒与接地导轨接触，随接地导轨的金属皮带运动到静电场区，静电场区是包括分离辊，该分离辊通过第一电刷与正极高压电源连接，使接地导轨与分离辊之间形成静电场，在静电吸引力的作用下，保留电荷量大的塑料颗粒被带离接地导轨并吸附在分离辊上，随分离辊一起运动并经毛刷刷下落入大电荷产物收集区，保留电荷量小的塑料颗粒随接地导轨运动落入小电荷产物收集区，中间体塑料颗粒被带离接地导轨后落入中间体产物收集区。Step 4: The charged plastic particles are in contact with the grounding guide rail, and move to the electrostatic field area with the metal belt of the grounding guide rail. The electrostatic field area includes a separation roller, which is connected to the positive high-voltage power supply through the first brush to make the grounding An electrostatic field is formed between the guide rail and the separation roller. Under the action of electrostatic attraction, the plastic particles with a large amount of charge are taken away from the grounded guide rail and adsorbed on the separation roller. They move together with the separation roller and fall into the large In the charge product collection area, the plastic particles with a small amount of retained charge fall into the small charge product collection area with the movement of the ground rail, and the intermediate plastic particles are taken away from the ground rail and fall into the intermediate product collection area. 2.根据权利要求1所述的基于荷电衰减分选的废旧硬质塑料的回收利用方法，其特征在于，还包括步骤五，落入中间体产品收集区的中间体塑料颗粒经由传送带送入所述的喂料器。2. The method for recycling waste and old hard plastics based on charge decay sorting according to claim 1, further comprising step 5, the intermediate plastic particles falling into the intermediate product collection area are sent into the feeder. 3.根据权利要求1或2所述的基于荷电衰减分选的废旧硬质塑料的回收利用方法，其特征在于，步骤一中，所述的对辊式破碎机的齿间距为3mm。3. The method for recycling waste and old hard plastics based on charge decay sorting according to claim 1 or 2, characterized in that, in step 1, the tooth spacing of the pair of roller crushers is 3mm. 4.根据权利要求1或2所述的基于荷电衰减分选的废旧硬质塑料的回收利用方法，其特征在于，步骤二中，所述的中速冲击粉碎机的转速小于或等于700转/分。4. The method for recycling waste and old hard plastics based on charge decay sorting according to claim 1 or 2, characterized in that, in step 2, the speed of the medium-speed impact mill is less than or equal to 700 revolutions /point.
CN201310695084.0A 2013-12-17 2013-12-17 Method for recycling waste hard plastics based on charged attenuation sorting Pending CN103707436A (en)

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CN104589544A (en) * 2015-01-16 2015-05-06 深圳市普莱姆科技有限公司 Waste plastic separation device
CN104708731A (en) * 2015-03-25 2015-06-17 上海交通大学 Separation and recycling method for PVC (Polyvinyl Chloride) in waste mixed plastic
CN105538547A (en) * 2016-01-25 2016-05-04 奥士康科技股份有限公司 Method for crushing PCB (printed circuit board)
CN105855049A (en) * 2016-06-08 2016-08-17 深圳奇滨科技开发有限公司 Electrostatic dust removal device
CN106423569A (en) * 2016-08-29 2017-02-22 上海交通大学 Composite electrostatic separation method for resin and glass fibers in wasted circuit board
CN107018766A (en) * 2017-05-27 2017-08-08 河南科技大学 Oat cleaning plant based on electric field force
CN108232350A (en) * 2017-12-28 2018-06-29 中国科学院广州能源研究所 A kind of electrode material stripping off device and method suitable for lithium ion battery
CN111590785A (en) * 2020-06-02 2020-08-28 南京浦世环境科技发展有限公司 Method for preparing wood-plastic composite material by using waste mask
CN114700179A (en) * 2022-03-21 2022-07-05 国网河南省电力公司电力科学研究院 Method for separating and recovering waste lithium iron phosphate positive and negative electrode active substances
CN114790405A (en) * 2022-04-22 2022-07-26 四川抒博科技有限公司 Method and apparatus for producing solid fuel
CN114953259A (en) * 2022-05-25 2022-08-30 中国矿业大学 Washing and charging integrated waste plastic reinforced electric separation system and method
CN117415977A (en) * 2023-10-31 2024-01-19 安徽浙能科技有限公司 An electrostatic sorting device for waste circuit board plastics

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CN104589544A (en) * 2015-01-16 2015-05-06 深圳市普莱姆科技有限公司 Waste plastic separation device
CN104708731A (en) * 2015-03-25 2015-06-17 上海交通大学 Separation and recycling method for PVC (Polyvinyl Chloride) in waste mixed plastic
CN104708731B (en) * 2015-03-25 2017-03-01 上海交通大学 The separation and recovery method of PVC in waste and old mixed plastic
CN105538547A (en) * 2016-01-25 2016-05-04 奥士康科技股份有限公司 Method for crushing PCB (printed circuit board)
CN105855049A (en) * 2016-06-08 2016-08-17 深圳奇滨科技开发有限公司 Electrostatic dust removal device
CN106423569A (en) * 2016-08-29 2017-02-22 上海交通大学 Composite electrostatic separation method for resin and glass fibers in wasted circuit board
CN107018766A (en) * 2017-05-27 2017-08-08 河南科技大学 Oat cleaning plant based on electric field force
CN108232350A (en) * 2017-12-28 2018-06-29 中国科学院广州能源研究所 A kind of electrode material stripping off device and method suitable for lithium ion battery
CN111590785A (en) * 2020-06-02 2020-08-28 南京浦世环境科技发展有限公司 Method for preparing wood-plastic composite material by using waste mask
CN114700179A (en) * 2022-03-21 2022-07-05 国网河南省电力公司电力科学研究院 Method for separating and recovering waste lithium iron phosphate positive and negative electrode active substances
CN114700179B (en) * 2022-03-21 2023-09-15 国网河南省电力公司电力科学研究院 A method for separating and recycling waste lithium iron phosphate positive and negative active materials
CN114790405A (en) * 2022-04-22 2022-07-26 四川抒博科技有限公司 Method and apparatus for producing solid fuel
CN114953259A (en) * 2022-05-25 2022-08-30 中国矿业大学 Washing and charging integrated waste plastic reinforced electric separation system and method
CN117415977A (en) * 2023-10-31 2024-01-19 安徽浙能科技有限公司 An electrostatic sorting device for waste circuit board plastics
CN117415977B (en) * 2023-10-31 2024-06-07 安徽浙能科技有限公司 Waste circuit board plastic electrostatic separation device

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Application publication date: 20140409