CN110864379A - 蜂窝吸附体及使用该蜂窝吸附体的除湿空调装置 - Google Patents

蜂窝吸附体及使用该蜂窝吸附体的除湿空调装置 Download PDF

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CN110864379A
CN110864379A CN201910366032.6A CN201910366032A CN110864379A CN 110864379 A CN110864379 A CN 110864379A CN 201910366032 A CN201910366032 A CN 201910366032A CN 110864379 A CN110864379 A CN 110864379A
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carbon dioxide
moisture
air
removing carbon
adsorption rotor
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井上宏志
古木启明
黑田彩子
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Seibu Giken Co Ltd
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Abstract

本发明的目的在于提供一种能够降低低湿度作业室内的二氧化碳浓度的除湿空调装置。本发明中，利用预冷器对外部空气进行冷却除湿并将其分支成2路，使一部分通过能够同时去除二氧化碳和湿气的吸附转子的处理区域，使其余一部分通过能够同时去除二氧化碳和湿气的吸附转子的净化区域，并将通过处理区域的空气供给至低湿度作业室，利用再生加热器对混合通过能够同时去除二氧化碳和湿气的吸附转子的净化区域的空气与外部空气而成的空气进行加热并送至能够同时去除二氧化碳和湿气的吸附转子的再生区域，使其通过能够同时去除二氧化碳和湿气的吸附转子的再生区域之后，排出到装置外。

Description

蜂窝吸附体及使用该蜂窝吸附体的除湿空调装置
技术领域
本发明涉及一种适合锂离子电池的制造装置的除湿空调装置。
背景技术
锂离子电池的制造装置中，若不进行除湿则锂离子电池的质量会出现问题。即，锂与水分强烈反应，锂离子电池的制造装置中需要将露点设定为零下30摄氏度以下(以下，将温度全部设为“摄氏”)。
并且，阐明了锂离子电池的镍系正极材料由于吸附水和二氧化碳而形成从正极材料内部溶出的锂离子和锂化合物，而电极变差或电池的循环特性变差。
为了如此在低露点下制作二氧化碳浓度低的环境，有使液氮气化并用氮取代装置内的空气的方法，但该方法中，存在人无法进入装置内的问题。
因此，制作低露点环境时利用使用了吸湿材料的吸附式的除湿空调装置的方法是现实的，且较多的装置在使用该方法，但存在无法降低二氧化碳浓度的问题。
因此，作为制作二氧化碳浓度低的低露点环境的技术有专利文献1。专利文献1中所公开的技术为高精度地进行室内的露点控制，且能够降低二氧化碳浓度的技术，但使用氢氧化钠等二氧化碳吸附材料，在经过时间而二氧化碳吸附力降低时，需要更换新的二氧化碳吸附材料。
并且，作为解决专利文献1的更换二氧化碳吸附材料的问题的技术有专利文献2。专利文献2中所公开的技术为利用湿气及二氧化碳吸附转子控制该转子的转速，由此控制室内的露点和二氧化碳浓度。
而且，专利文献3中所公开的装置与专利文献1和专利文献2的手套箱等相比室内容量相对大，是使人能够进入到其中进行作业且降低低湿度作业室内的二氧化碳浓度的装置。因此，使用具备二氧化碳吸附转子和湿气吸附转子的除湿空调装置。
专利文献1：日本特开2014-97437号公报
专利文献2：日本特开2016-2519号公报
专利文献3：日本专利申请2017-139547
如上述，专利文献1及专利文献2中所公开的装置为制作降低了室内的二氧化碳浓度的低露点环境的装置，但均为室内的容量为1～3m3左右的相对小的手套箱用装置，且安装有橡胶制等手套以免人的湿气进入室内。从而，如锂离子电池的制造装置，存在无法适用于如人进入室内进行作业的干燥室的低湿度作业室的问题。
并且，专利文献3中所公开的装置为使人进入到室内进行作业的如干燥室那样的降低低湿度作业室的二氧化碳浓度的装置，但由于使用装载了二氧化碳吸附转子和湿气吸附转子这两种转子的除湿空调装置，因此与装载一种转子的专利文献1和专利文献2的除湿装置相比，存在装置变大且初始成本增加的问题。
发明内容
本发明是为了解决所述课题而完成的，其目的在于提供一种除湿空调装置，其装载有能够同时去除水分和二氧化碳的转子，并且室内的容量相对大且能够降低使人能够进入其中进行作业的干燥室等低湿度作业室内的二氧化碳的浓度。
本发明的最主要的特征在于，具有对外部空气进行冷却的预冷器，并将通过预冷器被冷却除湿的空气的一部分进行分支，使其通过能够同时去除水分和二氧化碳的吸附转子的吸附区域，并使其余一部分通过能够同时去除水分和二氧化碳的吸附转子的净化区域，由此将水分和二氧化碳浓度变低的空气供给至室内。
本发明的除湿空调装置使用能够同时去除二氧化碳和湿气的一台吸附转子来降低干燥室等干燥室内的露点温度，而且还能够降低二氧化碳浓度。
并且，能够提供一种无法从干燥室向除湿空调装置回流的一次性通过的装置。
附图说明
图1为表示本发明的除湿机的实施例1的流程图。
图2为改变转子的各区域的风量比时的相对于转子转速的二氧化碳去除率的曲线图。
图3为改变转子的各区域的风量比时的相对于转子转速的处理出口露点温度的曲线图。
附图标记的说明：
1-预冷器，2-能够同时去除二氧化碳和湿气的吸附转子，3-再生加热器。
具体实施方式
本发明实现提供一种如下除湿空调装置的目的：该除湿空调装置中，将通过能够同时去除二氧化碳和湿气的吸附转子的吸附区域而成为低二氧化碳浓度且低湿度的空气供给至室内，并降低供给空气的二氧化碳浓度而设为低露点。
[实施例1]
以下，根据表示本发明的实施例1的流程的图1进行说明。外部空气OA通过空气过滤器(未图示)被去除尘埃。该外部空气通过预冷器1被冷却并通过结露而除湿。从预冷器1排出的空气分支成2路之后，一部分通过阀门等调整风量，并通过能够同时去除二氧化碳和湿气的吸附转子2的处理区域(吸附区域)，其余一部分通过净化区域。
能够同时去除二氧化碳和湿气的吸附转子2使用对二氧化碳的吸附性能不造成湿度影响的如下材料来制作。对玻璃纤维纸、陶瓷纤维纸、生物溶解性无机纤维纸等不燃性纸片进行波状(波纹)加工而卷绕加工成转子状的转子，其担载即使因使用无机系粘合剂等而潮湿也能够吸附二氧化碳的由碳酸钾、碳酸钠、离子液体、Ce或Zr的氧化物构成的二氧化碳捕捉材料等。而且，能够同时去除二氧化碳和湿气的吸附转子2被划分为处理区域、净化区域、再生区域这三个区域。能够同时去除二氧化碳和湿气的吸附转子2通过齿轮传动马达(未图示)等旋转驱动。
在此，作为能够同时去除二氧化碳和湿气的吸附转子2的一例，以下示出作为二氧化碳捕捉材料使用由Ce的氧化物构成的粉末吸附材料(以下称为“Ce氧化物吸附材料”)时的蜂窝吸附体的制作方法。Ce氧化物的蜂窝吸附体例如通过在含有Ce氧化物吸附材料、粘合剂及水的浆液中浸渗蜂窝吸附体并进行干燥来制作。Ce氧化物吸附材料的平均二次粒径设为浆液的粘度为能够用蜂窝吸附体进行浸渗处理的0.5μm至不会因粘合剂产生落粉的最大二次粒径即20μm(通过扫描型电子显微镜或激光衍射/散射式粒径分布测定装置测定)。关于蜂窝尺寸，设为可轻松地通过通用的送风机的风压使空气流动的每平方英寸50泡孔至400泡孔(转子表面上的蜂窝的个数)，就蜂窝的厚度方向(转子宽度方向)的长度而言，从通用送风机的风量和能够同时去除二氧化碳和湿气的性能考虑，设为50mm至600mm。将玻璃纤维纸和陶瓷纤维纸等蜂窝母材以300度至600度进行烧成，优选以400度至500度进行烧成而设为纤维载体，作为能够同时去除二氧化碳和湿气的吸附材料，在转子上以体积密度(kg/m3)的比例计担载20％～70％的Ce氧化物吸附材料，优选担载40％～60％。另外，作为粘合剂即二氧化硅溶胶，使用将不易影响Ce氧化物吸附材料的二氧化碳吸附特性并且发挥吸湿材料的功能的粒径4nm(制造商产品目录值)作为最小粒径且将不产生Ce氧化物吸附材料的落粉(从吸附转子脱落)的最大粒径50nm(制造商产品目录值)作为最大粒径的粘合剂。并且，在吸附转子担载二氧化硅溶胶的担载率以体积密度(kg/m3)的比例计设为5％～25％，优选设为10％～20％，浸渗浆液的pH设为浆液的稳定区域即弱酸性～弱碱性。
而且，为了提高能够同时去除二氧化碳和湿气的吸附转子2的除湿性能，也可以设为除了同时吸附二氧化碳和湿气的Ce氧化物吸附材料之外，还混合沸石或二氧化硅凝胶等吸湿材料，而担载于能够同时去除二氧化碳和湿气的吸附转子2。
通过处理区域而二氧化碳浓度变低的低露点空气供给至作为供给处的低湿度作业室等。
并且，通过净化区域的空气与外部空气混合之后，通过再生加热器3被加热至能够同时去除二氧化碳和湿气的吸附转子2的再生所需的温度为止并送至再生区域。
从再生区域排出的空气作为废气EA而释放到除湿空调装置的外部。另外，为了改善同时去除二氧化碳和湿气的性能，将通过预冷器之后的处理空气的一部分进行分支而作为净化空气，但也可以设为不将处理空气进行分支而直接将装置外的外部空气导入装置而作为净化空气的结构。并且，为了降低再生加热器3的能耗，也可以设为将从再生区域排出的废气EA和送至再生区域的外部空气进行显热交换的结构。
而且，需要低湿度的环境时，可以设为在能够同时去除二氧化碳和湿气的吸附转子2的后段(后方)，作为吸附材料使用沸石和/或二氧化硅凝胶，并设置至少被划分为处理区域和再生区域这两个区域的除湿转子的结构。通过设为这种结构，能够进一步对通过能够同时去除二氧化碳和湿气的吸附转子2的空气进行除湿。
图2中示出使用能够同时去除直径为320mm、宽度为400mm的二氧化碳和湿气的吸附转子2，改变净化区域∶再生区域∶处理区域的风量比时的相对于转子转速(每小时的转子转速：rph)的二氧化碳去除率的曲线图。另外，在处理入口二氧化碳浓度500ppm、处理入口空气温度12℃、处理入口空气绝对湿度6g/kg(DA)、处理入口空气面风速2m/s、净化入口空气面风速1.5m/s至2m/s、再生入口二氧化碳浓度500ppm、再生入口空气温度140度、再生入口空气绝对湿度12g/kg(DA)、再生入口空气面风速2m/s至3m/s下进行了试验。并且，图3中示出相同条件下的处理出口露点温度相对于转子转速的曲线图。
根据这些曲线图可知，作为湿度性能，转子转速低为佳，但从与二氧化碳去除率的均衡来看，以净化区域∶再生区域∶处理区域为1∶4.5∶9的风量比计，转子转速为20rph为佳。
实施例1中由于不使用来自低湿度作业室等供给处的回流RA，因此为即使在低湿度作业室内产生易燃性强的有机溶剂气体或产生对人体有害的气体，或者产生如使能够同时去除二氧化碳和湿气的吸附转子2变差的气体等的情况下也能够使用的除湿空调装置。
产业上的可利用性
本发明能够提供一种如上所述通过使用一台能够同时去除二氧化碳和湿气的吸附转子，从而能够降低低湿度作业室内的二氧化碳浓度的除湿空调装置。

Claims (9)

1.一种蜂窝吸附体，其能够同时去除在纤维载体担载Ce氧化物吸附材料和二氧化硅的二氧化碳及水分，该蜂窝吸附体中，
作为Ce氧化物吸附材料，为由平均二次粒径0.5Sm～20Sm的Ce的氧化物构成的粉末吸附材料，
作为二氧化硅，由平均粒径4nm～50nm的二氧化硅溶胶构成。
2.根据权利要求1所述的蜂窝吸附体，其中，
蜂窝尺寸为每平方英寸50泡孔至400泡孔，并且蜂窝的厚度方向的长度为50mm至600mm。
3.根据权利要求1、2所述的蜂窝吸附体，其中，
所述蜂窝吸附体中Ce氧化物吸附材料的担载率为20％～70％，并且二氧化硅溶胶的担载率为5％～25％。
4.根据权利要求1至3所述的蜂窝吸附体，其特征在于，
所述纤维载体为由玻璃纤维和/或生物溶解性无机纤维而得的纤维载体。
5.根据权利要求1至4所述的蜂窝吸附体，其特征在于，
除了所述Ce氧化物吸附材料之外，还混合担载了吸湿材料。
6.一种除湿空调装置，其特征在于，
具有至少被划分为再生区域、处理区域及净化区域这3个区域的能够同时去除二氧化碳和湿气的吸附转子，利用预冷器对外部空气进行冷却除湿，将通过所述预冷器的空气的一部分进行分支，并送至所述能够同时去除二氧化碳和湿气的吸附转子的净化区域，使其余一部分通过所述能够同时去除二氧化碳和湿气的吸附转子的处理区域而作为供给空气供给至供给处，利用再生加热器对混合通过所述能够同时去除二氧化碳和湿气的吸附转子的净化区域的空气与外部空气的空气进行加热，使其通过所述能够同时去除二氧化碳和湿气的吸附转子的再生区域，并将通过所述能够同时去除二氧化碳和湿气的吸附转子的再生区域的空气排出到装置外。
7.一种除湿空调装置，其特征在于，
具有至少被划分为再生区域、处理区域及净化区域这3个区域的能够同时去除二氧化碳和湿气的吸附转子，利用预冷器对外部空气进行冷却除湿，使其通过所述能够同时去除二氧化碳和湿气的吸附转子的处理区域而作为供给空气供给至供给处，并将外部空气送至所述能够同时去除二氧化碳和湿气的吸附转子的净化区域，利用再生加热器对混合通过所述净化区域的空气与外部空气的空气进行加热，使其通过所述能够同时去除二氧化碳和湿气的吸附转子的再生区域，并将通过所述能够同时去除二氧化碳和湿气的吸附转子的再生区域的空气排出到装置外。
8.根据权利要求6、7中任一项所述的除湿空调装置，其特征在于，
将通过所述再生区域的空气与送至所述再生加热器的外部空气进行显热交换。
9.根据权利要求6至8中任一项所述的除湿空调装置，其特征在于，
在所述能够同时去除二氧化碳和湿气的吸附转子的后段设置有除湿转子。
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