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高纯氦气
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高纯氦气

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超纯氦气应用
超纯氦气用于超低温研究、气相分析、焊接、探漏、化学气相淀积、晶体生长、等离子干刻、特种混合气等,用作标准气、平衡气、医疗气、气球电子管潜水服等的充气。
光学仪表、稀有金属冶炼、发射火箭、制造核武和原子弹、红外探测技术、食品保护、等离子体、雷达探测、高空摄影、低温泵、霓虹灯.气相色谱用高纯氦气 
1.氦气纯度:99.999%
2.高纯氦杂质:氢含量<1ppm,氖含量<4ppm,一氧化碳含量<0.5ppm,二氧化碳含量<0.5ppm,甲烷含量<0.5ppm,水分含量<3ppm氧(氩)含量<1ppm,氮含量<2ppm。
 成分
 
 高纯氦气
 单位
 氦气
≥ 
99.999% 
 %V
 氖气
 ≤
 4
ppmv 
 氢气
 ≤
 1
 ppmv
 氧气
 ≤
 1
 ppmv
 氮气
 ≤
 2
 ppmv
 一氧化碳
 ≤
 0.5
 ppmv
 二氧化碳
 ≤
 0.5
 ppmv
 甲烷
 ≤
 0.5
 ppmv
 水份
≤ 
 3
 ppmv
3.气体描述:氦气为无色无味惰性气体,化学性质完全不活泼。工业上氦气主要从富含氦气的天然气中分离、精制得到高纯氦气,然后液化成液氦运往世界各地充 入氦气钢瓶。几乎世界上所有的氦气都是由美国、俄罗斯、加拿大、阿尔及利亚的天然气井中提取的。氦气分子量。
4.0006。沸点 (101.325kPa):-268.94℃。气体密度(0℃,101.325kPa):0.1785 kg/m3。
5.高纯氦气的应用:常用作载气、辅助气体,广泛用于GC(气相色谱仪)、GC-MS(气-质联用、气相色谱-质谱联用仪),广泛用于化工厂、玩具厂、学校、科研单位等。
超纯氦气钢瓶类别
名称:钢质无缝气瓶 (执行标准GB5099\ISO9809)
型号
WMA219-40-15
容积
8、40(m3)
高度
1.310(m)
外形尺寸
0.219*1.310(m)
重量
48(kg)
材质
37Mn
超纯氦气钢瓶使用注意事项
1.气瓶使用和检验遵照国家质量技术监督局《气瓶安全监察规程》的规定。
2.气瓶不得靠近火源,不得受日光曝晒,与明火距离一般应该不小于10米,气瓶不得撞击。
3.气瓶的瓶子严禁沾染油脂。
4.气瓶内的气体不能全部用尽,应该留不小于0.04MPa剩余压力。
5.气瓶充气压力不得超过规定压力。
6.安全帽要随时装上,一保护气阀。
7.气瓶每三年检验一次(特殊情况例外)做外表检查及进行水压试验,试验合格后方可继续使用,检验在充气单位进行。
超纯氦气制取方法
1.天然气分离法:工业上,主要以含有氦的天然气为原料,反复进行液化分馏,然后利用活性炭进行吸附提纯,得到超纯氦气。
2.合成氨法:在合成氨中,从尾气经分离提纯可得>超纯氦气
3.空气分馏法:从液态空气中用分馏法从氖氦混合气中提出超纯氦气。
4.铀矿石法:将含氦的铀矿石经过焙烧,分离出气体,再经过化学方法,除去水蒸气、氢气和二氧化碳等杂质提纯出超纯氦气。
 
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