CN104201248A - 薄膜太阳能电池的回收方法 - Google Patents
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Abstract
本发明涉及薄膜太阳能电池的回收方法,属于资源回收领域。本发明要解决的技术问题是提供一种薄膜太阳能电池的回收方法。本发明薄膜太阳能电池的回收方法,包括如下步骤:a、破碎处理:敲击薄膜太阳能电池,使钢化玻璃层形成网状裂痕;b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻;其中,液氮的用量至少将薄膜太阳能电池淹没;c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电磁板。本发明薄膜太阳能电池的回收方法处理时间短,采用物理方法处理,简单易操作,分离得到的薄膜太阳能电磁板表面干净,无杂质,经过处理之后可再利用。
Description
技术领域
本发明涉及薄膜太阳能电池的回收方法,属于资源回收领域。
背景技术
当电力、煤炭、石油等不可再生资源频频告急,能源问题日益成为制约国际社会经济发展的瓶颈时,越来越多的国家开始实行“阳光计划”,开发太阳能资源,寻求经济发展的新动力。
目前市场上的多元化合物薄膜太阳能电池,如砷化镓、硫化镉、碲化镉及CIGS(铜铟镓硒)薄膜太阳能电池等。然而由于其含有碲、镉等成分,对环境具有潜在的污染隐患。因此,需要对贵重金属进行回收、再利用。
现在对太阳能电池的回收大多都集中在化学回收方法方面,如采用气相法和液相法回收电池中的碲和镉组分。
公开号为CN10319914A公开了一种碲化镉薄膜太阳能电池的回收处理方法,包括步骤:粉碎,将太阳能电池板进行粉碎,以破坏各膜层结构,使其完全裸露;溶解,采用酸性溶液溶解固态的硫化镉和碲化镉,形成含有碲离子和镉离子的第一溶液;过滤:采用过滤筛过滤第一溶液,以去除第一溶液中的玻璃和EVA碎渣,形成第二溶液;添加碱性溶液,向第二溶液中加入碱性溶液,直至形成PH值为10.4-10.6的第三溶液;添加聚合氯化铝溶液和活性炭粉末,向第三溶液中添加浓度为8-12%的聚合氯化铝溶液,且添加的聚合氯化铝溶液与第三溶液的体积比为0.8-1.2:333,同时,添加活性炭粉末,活性炭粉末与第三溶液的质量比为0.5-2kg:60T,形成第四溶液;DF膜过滤,采用DF膜过滤出第四溶液中徐庄的碲化合物和镉化合物。
然而,上述方法步骤较多,操作复杂,因此,寻找一种操作更方便、分离效果更好的薄膜太阳能电池的回收方法,显得尤为重要。
发明内容
本发明要解决的技术问题是提供一种薄膜太阳能电池的回收方法。
本发明薄膜太阳能电池的回收方法,包括如下步骤:
a、破碎处理:敲击薄膜太阳能电池,使钢化玻璃层形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻;其中,液氮的用量至少将薄膜太阳能电池淹没;
c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电池板。
其中,所述薄膜太阳能电池为多元化合物薄膜太阳能电池,优选为砷化镓、硫化镉、硫化镉或铜铟镓硒薄膜太阳能电池;更优选为硫化镉或铜铟镓硒薄膜太阳能电池。
进一步的,作为优选方案,所述b步骤冷冻处理时间为10~60s;更优选为20~40s。
本发明有益效果:
1、本发明薄膜太阳能电池的回收方法处理时间短。
2、本发明薄膜太阳能电池的回收方法采用物理方法处理,简单易操作。
3、本发明薄膜太阳能电池的回收方法分离得到的薄膜太阳能电池板表面干净,无杂质,经过处理之后可再利用。
附图说明
图1冷冻处理前钢化玻璃层与金属层的结构示意图;
图2冷冻处理后钢化玻璃层与金属层的结构示意图;
图中标记,1-金属层;2-钢化玻璃层。
具体实施方式
本发明薄膜太阳能电池的回收方法,包括如下步骤:
a、破碎处理:敲击薄膜太阳能电池,使钢化玻璃层形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻;
c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电池板。
其中,冷冻处理中液氮的用量至少将薄膜太阳能电池淹没。
进一步的,本发明薄膜太阳能电池的回收方法中所述薄膜太阳能电池为多元化合物薄膜太阳能电池,如砷化镓、硫化镉、硫化镉及铜铟镓硒(CIGS)薄膜太阳能电池等,优选为硫化镉或铜铟镓硒(CIGS)薄膜太阳能电池。
进一步的,上述a步骤中破碎处理的目的是为了能够利于冷冻后进行分离,因此,敲击程度以钢化玻璃层形成网状裂痕,但不至脱落的状态即可。
进一步的,作为优选方案,b步骤冷冻处理时间为10~60s,更优选为20~40s。
采用液氮进行冷冻处理是因为液氮可以使薄膜太阳能电池急速冷却,从而导致钢化玻璃中的预应力失衡而易于碎裂。同时,由于镀层与基体线膨胀系数不同,以钼为例,其平均线膨胀系数(1/K)为5×10-6,而薄膜太阳能电池表面的钢化玻璃的平均线膨胀系数(1/K)为9×10-6,当用液氮进行急速冷冻处理时,接触压力会减弱,使接触不充分,从而分离,图1是薄膜太阳能电池冷冻处理前钢化玻璃层与金属层的结构示意图,图2是薄膜太阳能电池冷冻处理后钢化玻璃层与金属层的结构示意图。
下面结合实施例对本发明的具体实施方式做进一步的描述,并不因此将本发明限制在所述的实施例范围之中。
实施例1 采用本发明方法回收薄膜太阳能电池
a、破碎处理:敲击硫化镉薄膜太阳能电池的钢化玻璃层,形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻,冷冻时间为30秒;液氮的用量以淹没薄膜太阳能电池为准;
c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电池板。
实施例2 采用本发明方法回收薄膜太阳能电池
a、破碎处理:敲击CIGS(铜铟镓硒)薄膜太阳能电池的钢化玻璃层,形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻,冷冻时间为60秒;液氮的用量以淹没薄膜太阳能电池为准;
c、分离:破碎冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电池板。
实施例3 采用本发明方法回收薄膜太阳能电池
a、破碎处理:敲击硫化镉薄膜太阳能电池的钢化玻璃层,形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻,冷冻时间为10秒;液氮的用量以淹没薄膜太阳能电池为准;
c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电池板。
Claims (6)
1.薄膜太阳能电池的回收方法,其特征在于,包括如下步骤:
a、破碎处理:敲击薄膜太阳能电池,使钢化玻璃层形成网状裂痕;
b、冷冻处理:将破碎处理后的薄膜太阳能电池用液氮进行冷冻;其中,液氮的用量至少将薄膜太阳能电池淹没;
c、分离:敲击冷冻处理后的薄膜太阳能电池,分离得到薄膜太阳能电磁板。
2.根据权利要求1所述的薄膜太阳能电池的回收方法,其特征在于:薄膜太阳能电池为多元化合物薄膜太阳能电池。
3.根据权利要求2所述的薄膜太阳能电池的回收方法,其特征在于:所述多元化合物薄膜太阳能电池为砷化镓、硫化镉、硫化镉或铜铟镓硒薄膜太阳能电池。
4.根据权利要求3所述的薄膜太阳能电池的回收方法,其特征在于:所述多元化合物薄膜太阳能电池为硫化镉或铜铟镓硒薄膜太阳能电池。
5.根据权利要求1~4任一项所述的薄膜太阳能电池的回收方法,其特征在于:b步骤冷冻处理时间为10~60s。
6.根据权利要求5所述的薄膜太阳能电池的回收方法,其特征在于:b步骤冷冻处理时间为20~40s。
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CN110964906A (zh) * | 2018-09-28 | 2020-04-07 | 荆门市格林美新材料有限公司 | 一种光伏组件的回收方法 |
CN112701371A (zh) * | 2020-12-28 | 2021-04-23 | 上海龙旗科技股份有限公司 | 电子产品电池冷冻拆解方法 |
CN114075624A (zh) * | 2020-08-14 | 2022-02-22 | 赖志煌 | 薄膜太阳能电池的回收方法 |
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