CN101043951B - 可运输的塑料回收*** - Google Patents
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Abstract
一种用于分离废弃物质流中的材料的可运输***。一种分离和研磨装置(125)形成的构造安装在可运输平台上。所述装置构成并布置为从富含塑料的混和物中生产三种或更多种产品流。所述产品流之一是粗糙的重质流,一种产品流是研磨的富含塑料的产品流,一种产品流是轻质材料流。所述***可以运输到废弃物位置,操作而分离废弃物,然后重新布置在新位置。
Description
相关申请的交叉引用
本申请要求享有2002年7月22日提交的美国临时申请US60/397953的权利,在此通过引用而包含。
发明领域
本发明涉及塑料、金属及其他材料的回收。
背景技术
根据华盛顿特区塑料工业协会的“美国的塑料业”,由于每年产生超过3600万公吨(MT)的材料和$2700亿的产品,且负责约320万个工作,塑料业和相关产业成为美国的第四大工业。然而,不象其他的材料工业,比如钢铁和铝,该工业几乎完全依赖不可再生的原材料,主要是进口的石油。随着塑料的生长速度继续超过所有其他材料,这种依赖性变得更为明显。
目前制造商供应的大多数塑料在垃圾填埋场或焚化炉中结束其寿命,仅仅因为没有可以将其经济地回收的技术。环境保护局(EPA)估计,城市固体废弃物(MSW)中塑料的数量从在1960年前的小于1百万公吨到2000年的超过20百万公吨。
耐用品比如汽车,器具和电子设备占MSW中塑料的约三分之一。耐用品在其有效寿命结束时逐渐收集和部分回收,以避免处理费用和潜在的责任,并回收金属和其他适销的原材料。收回和生产商责任立法也在发展。
从耐用品中回收塑料需要富含塑料的原材料。汽车、器具和电子产品通常含有比塑料更多的金属(通常塑料含量小于30%),所以金属的回收操作必须在塑料回收之前。大多数金属回收操作将设备破碎,以便节省成本地使金属从完整部件脱离。大规模塑料回收操作必须能从许多金属回收操作获得这种富含塑料的原材料。
为了从这种富含塑料的原材料中生产高价值的产品,塑料回收过程必须能分离高度混和流。必须在逐片的基础上完成分离,以便以可接受的纯度实现较高的产品吞吐率。(参见1996年纽约州Carl HanserVerlag,J.Brandrup,塑料的再循环和回收,和马萨诸赛州Danvers,1999年5月11-13日IEEE会议,D.F.Arola,L. Allen,和M.B.Biddle,“电子设备的机械回收方案的评价”。)
从废弃的耐用品中节省成本地回收塑料的重要障碍之一是处理来自金属回收操作的富含塑料的原材料,而使其可以经济地运输到塑料回收设施。除了富含塑料的原材料之外,许多废弃物流含有相当数量的金属,绒毛,泡沫,碎屑,木材和纸张,将它们运输到塑料回收设施是不经济的,因为它们通常不是目标产品。而且,因为富含塑料的原材料通常是粉碎的材料,所以颗粒尺寸可能太大而不能达到经济运输所需的高体积密度。此外,在富含塑料的原材料中发现的一些金属可能通常足够大而损坏某些类型的粉碎设备。
有许多可以用于减小废弃材料尺寸的装置,包括造粒机,破碎机,研磨机,辊式破碎机,切碎机等。根据粉碎的材料,这些装置的效率变化。某些装置可以处理喂料中的大部分金属,但这些装置通常是非常大马力的装置。
还有多种用于从非金属中去除金属的技术。这些包括磁体,金属检测器,涡流装置和抽气机。
还有许多技术用于从富含塑料的物流中去除绒毛,泡沫,碎屑和纸张。这些装置包括抽气机,辊式分选机,真空重力分选台及其他装置。
发明内容
本发明提供了一种可运输的塑料回收***,该***包括用于能从耐用品回收塑料的分离和研磨装置。
总的来说,一方面,本发明的特征是用于提供一种在废弃物流中分离材料的可运输***的方法和***。分离和研磨装置形成的一种装置是安装在可运输的平台上。所述装置构成和布置成可以从富含塑料的送入混和物中生产三种或更多种产品流。所述产品流之一是粗糙的重质流,一种产品流是研磨的富含塑料的产品流,一种产品流是研磨的轻质材料流。
具体的实现方式可包括一或多个下述特征。所述装置可包括用于从富含塑料的混和物中分离金属材料的空气分离器,和与所述空气分离器工作连通的研磨机,而使从分离器排出的至少一部分材料进入研磨机中。所述***可包括安装在与所述研磨机工作连通的可运输平台上的第二分离器。第二分离器可以用于接收来自研磨机的研磨的材料流,并且至少从研磨的材料流分离出一种研磨的轻质材料流。第二分离器使用空气来分离轻质部分。所述***可包括用于接收来自空气分离器,研磨机或第二分离器的产品流的推进输送器或进料器。所述***可包括一或多个用于顶推或拖拉材料通过所述***的风扇。所述平台可包括在容纳所述设备的围壳内。所述平台可以包括在运输容器内,卡车拖车内,或轨道车内。
在另一方面,本发明的特征是用于处理富含塑料的混和物的方法和***。一种可运输的分离***,包括安装在可运输平台上的分离和研磨装置形成的装置,运送至废弃物品的位置。所述***用于处理富含塑料的喂料混和物,生产至少三种产品流,所述产品流包括一种粗糙的重质流,一种研磨的富含塑料的产品流,和至少一种研磨的轻质材料流。然后,将所述***从废弃物品位置移开。在具体的实现方式中,在整个运送,工作和移开步骤中,所述***的装置可以保持安装在可运输平台上。所述方法可包括将研磨的富含塑料的产品流运输到塑料回收设施。
在一个实施例中,本发明提供了一种可运输的塑料回收***,该***包括安装在可运输的平台上,用于从废弃物流回收塑料的分离和研磨装置形成的装置。富含塑料的材料利用进料器送入***中,所述进料器首先通过抽气机去除有问题的金属污染物。然后通过推进输送器将富含材料的产品输送至研磨机,减小颗粒的尺寸,而使其可以通过某些在10和60mm之间的筛网。然后,将研磨的材料通过抽气工艺发送,去除绒毛,碎屑,纸张,木材和其他轻质材料。风扇可以提供抽气装置的吸力。最终产品的体积密度增加,同时还增加了所需塑料材料的产量。然后,致密化的塑料产品可以节省成本地运输到中央塑料回收设施。
本发明可具有一或多个下述优点。所述***的尺寸是这样的,即所述装置形成的设备足够紧凑而可以容易地重新定位,以适应变化的废弃物品位置-例如,它可以为在标准集装箱上运输的尺寸,而使该***可以容易地通过公路,轨道或水路运输。整个***作为一个单元易于运输。因为单个废弃物品位置通常足够大而仅在短时间内为所述***供应原料,当在一个位置的富含塑料的废弃材料供应用尽时,所述***可以移动到新的源位置,即使是很不便利的遥远区域。所述***容易、快速和经济的安装能够实现所述***的快速周转。
小型,集装箱化设计减小了噪音,振动和灰尘的产生。这些特征使所述***易于移动和安装,并通过减轻对使用环境的影响而减少环境卫生和安全问题。这可以使操作更容易,增加了***的有效机动性。所述***可以有利地放置产生平均颗粒尺寸为10mm至200mm的富含塑料的废弃物或副产品的金属回收设施处。
因为所述***去除了非目标材料,所以运输所需的产品,而不是混和的原材料,通常更经济。可以避免用于粗糙的颗粒尺寸和过多的绒毛含量造成的过度金属污染和低体积密度。研磨的产品可以在某些种类的塑料中富集,因为某些材料在抽气机中不同地分离。在金属回收设施处分离富含金属的副产品避免了多次运输那些材料的成本。
本发明的一或多个实施例的细节在附图和下面的描述中公开。除非以其他方式限定,在此使用的所有技术和科学术语具有本发明所属领域的普通技术人员通常理解的意义。在此提到的所有出版物,专利申请,专利和其他文献通过引用而包含其全部内容。在冲突的情况下,本申请说明书,包括定义将进行控制。从说明书,附图和权利要求书中,本发明的其他特征和优点将更为明显。
附图简要说明
图1示出了用于可运输的材料分离***中的设备结构的一种实现方式的示意图。
图2示出了所述设备结构的另一种实现方式的示意图。
图3示出了在可运输平台上的一种实现方式的图示。
图4是在可运输平台上的一种实现方式的另一视图。
图5是具有用于处理混和材料的可运输平台的俯视图。
在各附图中相同的附图标记和标示表示相同的元件。
详细描述
含有塑料的产品的收集地点并不总是靠近或便于混和材料回收设施,难以将材料运输到回收设施或过于昂贵。然而,由于环境,经济和空间相关的原因,处置材料的替代方案不是所希望的。本发明提供了代替将所需的和不需的材料运输到回收设施的技术和设备,塑料回收设施的一部分可以到达所述材料处,而仅回收所需的目标材料。
包括多个分离装置的一种装置永久地或可拆卸地安装在可以容易地从一处运输到另一处的平台上。所述平台可以是卡车拖车的基座,运输集装箱的基座,轨道车的基座,或可以容易地装在这些可运输单元任一上或中的另一平台。在运输过程中,所述分离装置牢固地固定在平台上,避免任何安全性危险或设备损坏。在所述配置中包括的具体分离装置可以变化,且可以根据场外分离的目标进行选择。所述***可以封装而减少噪音和振动。封装所述***还控制了灰尘。在另一实施例中,所述***可以打开,便于维护。
一种塑料回收设施可包括多个不同类型的循环设备,它们可以根据混和物的成分为处理混和材料而进行选择。在一个实施例中,根据本发明一方面的***包括初级分离器,研磨器,和一或多个次级分离器。富含塑料的材料送入第一分离器中,该分离器通过抽气机去除金属污染物。然后富含材料的产品输送到减小所述材料尺寸的研磨机。然后研磨的材料通过抽气工艺发送,去除绒毛,碎屑,纸张,木材和其他轻质材料。
塑料分离工艺通常从混和物中分离金属开始。通过在收集混和材料的地点去除金属,一部分混和物(大量金属)不必搬运、存储和运输到塑料回收设施,金属可以使用空气分离器与塑料分离。空气分离器可以是气锤分离器,该分离器是单级装置,该装置将送入的材料送入上升的气柱中,或振动台上,其中空气经振动台上的孔上升,或者是使喂料暴露于上升空气流的分离器。这种空气分离器可以调节而夹带喂料的轻质成分,使重质成分下落到捕获室或推进输送器。上升的空气柱可以由沿向上的方向吹送的空气,或通过使用吸力或空气再循环产生。
所述气锤可用于去除损坏研磨机的金属,以及并不希望在塑料回收设施回收的塑料。这些重质材料可以利用推进输送器去除,然后可以用于再处理和金属回收。
来自气锤的夹带产品可以直接沉积在研磨室,比如由Retech-Vecoplan of High Point,NC制造的旋转式研磨机,或由HerboldMeckesheim,GmbH,Meckesheim Germany制造的塑料造粒机。某些轻质,碎屑或泡沫材料可以保持在气流中夹带,这样可以从待研磨的材料中去除。这是可行的,因为研磨室本身可以动作而选择性地区分塑料与非常轻的材料。
研磨阶段后面可以有多种不同的工艺。例如,第二抽气机可以用于从混和物去除泡沫,绒毛和碎屑。旋流器也可用于去除轻质材料。各种推进输送器和喂料器可以用于使材料从分离的一个阶段运动到另一阶段,且阀,分流器,闸门和气锁可以用于将一部分回收工艺的产物与另一部分分离。风扇可用于顶推或拖拉材料通过所述***。所述风扇,或专用风扇可以用于收集通过所述工艺分离的灰尘,以保持清洁。所述***可以另外包括小型空气压缩机,以有助于维护和清理,并提供空气脉冲来清洁集尘器的过滤器。各种袋,收集器和箱可用于接收分离的产物。
各种装置和工艺可以自动地监测和控制。例如,风扇和研磨机的气压和安培数可以监测。所述***可以包括计算机控制***,调节进料,研磨和风扇速度。各种阀的位置也可以调节。所述计算机控制***可用于远程检测机器的使用,比如使用小时数,告知操作人员何时需要维护和所述设备已经运行了多长时间。所述***也可以用于提供有助于诊断问题的信息。
来自所述***的产品可以通过气动输送吹至散装货物容器。该容器可以是大型运输集装箱,料仓或箱或袋填充站。如果使用大型运输容器,通过取消包装,还可以降低运输所述产品的成本。如果所述产品输送到散装货物容器,那么可以包括比如由Fox Valve DevelopmentCorp.,Dover,N.J.销售的气动输送***。
在可运输的材料分离***100中使用的设备结构的一种实现方式在图1中示出。混和材料送入漏斗式接收器105,且使用由变频驱动装置115控制的输送器110计量送入抽气机120中。金属和废弃物到达抽气机120的底部,而轻质富含塑料的部分漂浮在上升空气柱中,并到达研磨机125。研磨机125将所述材料的尺寸减小成约1平方英寸的更均匀的尺寸。研磨机125可以是单轴旋转式研磨机,该研磨机装有可拆卸的***齿,筛网和撞锤,比如由Vecoplan of High Point,NC制造的,或其他适当的研磨机。
研磨的产品从研磨机125去除,利用推进输送器130送入空气抽气装置135。装置135受到调节而从所需的富含塑料的产品材料中去除废物,泡沫,绒毛和碎屑。所述产品直接降落经过抽气机135,且进入产品推进输送器140中。轻质产品,包括在输送器和研磨机处拾取的任何捕获灰尘,输送到负压下的旋流器145,其中旋流器145落下较大的轻质颗粒。
位于旋流器145底部的推进输送器150可能需要在其排放口有铰接端板,以减小经过推进输送器的进气,否则这可能易于将轻质材料吹出推进输送器,而返回旋流器145。铰接的端板受负压拉动而关闭,且当材料在推进输送器150的排放口堆积时,所述材料顶推铰链而打开,这可以使所述材料排出。风扇155在旋流器145上抽吸,产生附加的吸力,而抽空进料振动器110和研磨机125。风扇排放口可以具有转向分支,将一部分空气转向集尘器160。因为仅一部分空气送至集尘器,所以集尘器的尺寸可以保持最小。风扇排放口可以将空气送至气锤分离器120的下部空气入口,而使空气竖直进入。
在可运输的材料分离***200中使用的设备结构的另一种实现方式在图2中示出。在这种结构中,倾箱机205可以从约1立方码的大型运输箱向所述***输送。接收箱210接收所述材料,推进输送器215(或输送带)去除所述材料。这种单元可以使用变频驱动装置220控制速度,从而控制流速。所述材料输送至振动进料器225,该进料器将所述材料展开而为第一抽气机或气锤230提供单层,在此所述材料的单个片块基本上互相自由。抽气机230具有专用的风扇,提供运动的空气,产生上升空气柱。抽气机230去除金属和致密材料,它们为研磨带来麻烦,且这种材料送至推进输送器235的底部,经过换向阀240,进入两个收集箱245之一。轻质,富含塑料的材料在抽气机230的空气柱中上升,到达研磨机250。研磨的材料经推进输送器255和260输送至第二抽气机或空气分级器265,去除轻质材料。风门270控制这种分离。重质塑料产品到达空气分级器265的底部,经分流器280进入推进输送器275,进入两个收集袋285之一。所述***包括集尘器290,具有旋转式阀气锁295和废物输送推进机300,该推进机将轻质,绒毛,泡沫和碎屑送至箱。集尘器290设有用于清洁和净化过滤器的空气压缩机305。为集尘***310提供专用风扇,且所述风扇可用于空气分级器265。从所述工艺的各个位置收集灰尘,以保持清洁。
图3-5示出了图2所示的实现方式当安装在用于运输所述***的平台上时的各个视图。
其他的设备结构可包括在所述可运输的***中。上述结构仅是可能的设备结构示例。
示例
下面的示例仅是示例性的,并不意味着限制在权利要求中描述的本发明的范围,该示例显示了在去除金属和增加粉碎的富含塑料的材料体积密度上所述***的效率。
示例1:使用抽气机和研磨***去除金属
来自打印机墨盒和来自器具的富含塑料的粉碎材料都含有大量的金属。这两种物质流经美国国际制造公司(Woodland,CA)制造的气锤分离器进行分离处理,随后是在旋转式研磨机中减小尺寸。
表1示出了在每种物质流中被拒绝的的金属与气锤分离器的重物质流的百分比,和在处理过程中损失的全部塑料百分比。对于两种物质流,气锤分离器去除了大多数金属,而没有明显的塑料损失。
表1:在研磨和抽气装置中金属的抽气去除和塑料损失
打印机墨盒 | 器具 | |
被拒绝的全部金属百分比 | 83.7 | 64.3 |
损失的全部塑料百分比 | 4.8 | 1.7 |
示例2:使用抽气去除大型金属片块
来自器具的粗糙粉碎的富含塑料的材料经过气锤分离器进行处理。所述分离器调节而去除几乎所有可能危害研磨的大型金属(定义为任何大于25mm的尺寸)同时使塑料的损失最小。
表2示出了去除大型和小型金属片块的效率。数据显示几乎去除了所有的大型金属,同时仅去除了一小部分小型金属,和非常少的塑料。
表2:粗糙粉碎的器具材料在研磨和抽气装置中大型和小型金属的去除
全部金属中的大型金属百分比 | 66.3 |
拒至“重质”的全部金属百分比 | 56.6 |
拒至“重质”的大型金属百分比 | 92.5 |
拒至“重质”的小型金属百分比 | 28.9 |
损失至“重质”的全部塑料百分比 | 3.8 |
示例3:抽气后进行研磨而增加体积密度
使用气锤分离器,来自器具的粗糙粉碎的富含塑料的材料首先分离成“轻质”和“重质”流。“轻质”材料经过具有25.4mm(一英寸)的筛网的研磨机。
表3示出了进料,“重质”副产品和研磨的“轻质”产品的体积密度。体积密度是通过称量箱中的材料量,并用测量填充所述箱的材料的高度而确定体积计算出的。在这种情况下进料不含大部分绒毛和碎屑,所以希望从随后研磨的抽气阶段就没有体积密度变化。研磨的“轻质”产品具有比进料或“重质”副产品更高的体积密度。
表3:来自器具的富含塑料的材料的体积密度
流 | 体积密度(kg/m<sup>3</sup>) |
进料 | 331 |
“重质”副产品 | 352 |
流 | 体积密度(kg/m<sup>3</sup>) |
研磨的“轻质”产品 | 456 |
来自气锤的“重质”部分以金属,橡胶,电路板,厚和致密塑料的形式富集。厚和致密的塑料通常填充有玻璃,通常不希望作为塑料回收设施的进料。
而且,在金属粉碎操作时发现的许多富含塑料的物流已经观测到含有高达40%或更高重量的泡沫。这种泡沫占总体积的很大部分,以致运输富含塑料的产品非常昂贵。
本发明已经根据具体的实施例进行了描述。其他的实施例也在下述权利要求的范围内。例如,所述***的各种装置可以按不同的顺序布置,而仍然实现所需的结果。
Claims (12)
1.一种用于分离废弃物质流中的材料的可运输***,包含:
安装在可运输平台上的由分离和研磨装置形成的装置,所述分离和研磨装置在所述由分离和研磨装置形成的装置中构成为从富含塑料的送入混和物中生产三种或更多种产品流,所述产品流包括粗糙的重质流,研磨的富含塑料的产品流,和至少一种研磨的轻质材料流,其中所述由分离和研磨装置形成的装置包括:
作为分离器之一的气锤分离器,其从富含塑料的送入混和物中分离金属材料,所述气锤分离器是将送入的材料送入上升的气柱中的装置,其中上升的气柱夹带轻质材料并且允许重质材料通过所述气锤分离器下落;
与所述气锤分离器工作连通的研磨机,从而使所述分离器排出的至少一部分塑料材料进入所述研磨机;和
作为分离器之一的后续分离器,其安装在所述可运输平台上并与所述研磨机工作连通,所述后续分离器构造成接收来自所述研磨机的研磨的材料流,并且从所述研磨的材料流中分离至少一种研磨的轻质材料流;
其中,所述富含塑料的送入混和物包括汽车、器具或电子设备中的塑料和金属,并且平均颗粒尺寸为10mm至200mm。
2.如权利要求1所述的***,其特征在于,所述后续分离器使用空气来分离研磨的轻质材料流。
3.如权利要求1所述的***,其特征在于,还包含:
用于接收来自所述气锤分离器、研磨机或所述后续分离器的产品流的推进输送器或进料器。
4.如权利要求1-3之一所述的***,其特征在于,还包含:
一个或多个用于顶推或拖拉材料通过所述***的风扇。
5.如权利要求1所述的***,其特征在于,平台包括在容纳由分离和研磨装置形成的所述装置的围壳内。
6.如权利要求1所述的***,其特征在于,
所述平台包括在运输用集装箱、卡车拖车或轨道车内。
7.一种处理富含塑料的送入混和物的方法,包含:
将可运输的分离***输送至废弃物位置,所述***包括安装在可运输平台上的由分离和研磨装置形成的装置;
操作所述***以处理富含塑料的送入混和物,以生产至少三种产品流,所述产品流包括粗糙的重质流、研磨的富含塑料产品流、和至少一种研磨的轻质材料流,其中操作所述***包括:
将所述富含塑料的送入混和物供入气锤分离器以从所述富含塑料的送入混和物中分离金属材料,并且形成所述粗糙的重质流;
随后在研磨机中研磨从所述气锤分离器排出的塑料材料的至少一部分以形成研磨材料;和
随后将所述研磨材料从所述研磨机中送入第二分离器以从所述研磨材料中分离所述至少一种研磨的轻质材料流和所述研磨的富含塑料的产品流;和
从废弃物位置移走所述***;
其中,所述富含塑料的送入混和物包括汽车、器具或电子设备中的塑料和金属,并且平均颗粒尺寸为10mm至200mm。
8.如权利要求7所述的方法,其特征在于,
在整个输送、操作和移走步骤中,所述***的所述由分离和研磨装置形成的装置保持安装在所述可运输平台上。
9.如权利要求7-8之一所述的方法,其特征在于,还包含:
将研磨的富含塑料的产品流输送至塑料回收设施。
10.如权利要求7所述的方法,其特征在于,来自气锤的“重质”部分以金属、橡胶、电路板、厚和致密塑料的形式富集。
11.如权利要求4所述的***,其特征在于,还包括计算机控制***,以调节进料、研磨或风扇速度。
12.如权利要求11所述的***,其特征在于,所述计算机控制***远程监测机器的使用,以便告知操作人员何时需要维护和所述设备已经运行了多长时间。
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AU2003254115A1 (en) | 2004-02-09 |
EP1578575B1 (en) | 2015-09-09 |
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US20040159593A1 (en) | 2004-08-19 |
CN101043951A (zh) | 2007-09-26 |
JP2006507107A (ja) | 2006-03-02 |
WO2004009312A2 (en) | 2004-01-29 |
EP1578575A2 (en) | 2005-09-28 |
WO2004009312A3 (en) | 2008-07-10 |
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