从气瓶切换到实验室气体发生器的建议- Lab-Training.com

Ultra high purity hydrogen gas generator (Image Courtesy : http://www.directindustry.com/)

石油和石油化工，食品，口味和香水和药品等部门的工业实验室可以为特定应用容纳分数的气相色谱仪或其改性版本。这种系统是全年每年24小时的氮，氦气，氢气和零空气的大量消费者。即使是大型研发中心也需要定期补充这种气体谱系和质谱仪的这种气体。

世界各地的大多数实验室都是租用燃气缸，现在需要更换，然后电源耗尽。气体发电机为气瓶提供可行的替代品，并在文章中总结了它们的益处。在不同的头部下的益处

Cost
Convenience
Safety
Environmental concerns

在进入利益之前，将您熟悉气体发生器的一般原则和运作是一个好主意

Helium

Helium is used as a carrier gas in specific applications of GC and GC – MS. Helium gas generators are not available so the best option is to adopt alternative methods in which nitrogen or hydrogen can be used as a carrier gas.

Nitrogen

Nitrogen is the most popular carrier gas. The supply needs to be free of moisture and oil droplets therefore it is preferable to use gas filter assemblies prior to introduction into the gas chromatograph. The generator produces high purity nitrogen from compressed air whose purity is achieved by filtering through a permeable membrane for removal of other atmospheric contaminants and gases such as carbon dioxide, carbon monoxide and oxygen

零空气

Ultra high pure air is produced from a source of compressed air. A catalyst chamber or filter installed in the generator ensures a steady supply of zero air that is free from gases such as methane, carbon dioxide and carbon monoxide. Such air quality results in improved noise and stable baselines in applications using flame ionization detectors.

Hydrogen

将去离子水的电解产生氢气和氧气。质子交换膜允许氢通过，剩余的氧气排放到大气中。通过通过第二过滤器进一步纯化分离的气体，并且可以提供超高纯度氢供应。

天然气发电机提供的益处

气体发生器提供的益处无数，并且在低压下稳定地不间断地供应高压，需要最小的维护

Cost

Cost is a major consideration for analytical laboratories.gas generators afford following cost savings:

储蓄租赁汽缸
运输和处理费用通常由供应商涵盖，但如果购买项不涵盖这些，那么费用将由缩进实验室承担
空缸变化所需的时间可用于其他生产性活动，从而提供了对运营成本的总体节省
Saving on cost of gas manifolds, transfer lines and line casings from cylinders to the instruments
由于更换过滤器和其他次要组件，燃气发电机的维护涉及小费用

Convenience

Consistent high purity gases are delivered by generators without downtime which is common during cylinder changeover or waiting periods resulting from delays in supplies of cylinder replacements
可以在发电机的缓冲储罐的选择流速下获得气体供应
Freedom from dangling tubes and transfer gas lines from cylinders to chromatographs
No separate space allocations are required for cylinder storage yards whereas generators afford an aesthetic look over cylinders inside laboratories
通过手动转移圆柱体的自由
transport trolleys
No need for replacing regulators every time a cylinder is replaced
从气缸到气缸的纯度不一致的自由

Safety

Safety in use is an area of major concern after cost and convenience. The main safety features of gas generators over cylinders are:

氢气瓶构成了主要的安全风险。由于与氢气相关的火灾危害，泄漏可能会造成爆炸危险。在另一个手中，每当检测到泄漏时都有自动安全关闭功能
On dropping the valves can break due to force of the impact. This can lead to a major accident as the pressurized cylinder can shoot down forcibly through laboratories, stairways or halls damaging everything in its path and even break through walls. On the other hand gas generators hold very low gas volumes and that too at moderate pressures so such accidents are ruled out
打开或关闭阀门的使用时可能会导致破损，如果它们变得弱或生锈。高压气体释放会导致严重损伤。
Unsecured gas cylinders can trip and lead to severe injuries. The generators on the other hand save space and give the laboratory a tidy appearance