ADEV 8866TR热导氢气分析仪应用于氢冷发电机组
关键词: 热导气体分析仪,氧化锆氧量分析仪,热导氢气分析仪,热磁氧分析仪 发电机组
应用
在氢冷式发电机组，氢气通过在发电机中的空心导体的循环以除去通过在定子和转子中铜损产生的热量。氢气是一个很好的传热剂而被广泛使用。在通常或在线运行期间，氢气纯度必须保持在95％到99％之间，在这个区间氢气不会爆炸或燃烧是**的。
在氢冷发电机的启动阶段，空心导体和发电机内部本身都被周围空气包围，在用氢气吹扫之前，需要用一种惰性气体（如二氧化碳或氮气）吹扫。相反，在关机时的氢在空气被引入之前，也必须用惰性气体吹扫。
总的来说，必须要测量氢气纯度有2个原因，，要保持氢气纯度的正常运行，氢气纯度必须要在UEL（爆炸上限）74％H2以上才能保证氢气空气混合不会爆炸。**，监测惰性气体吹扫周期启动起来，以确保空气吹扫之前加入氢气和关断，以确保**氢气之前引入空气，以防止爆炸性H2的水平，因为这可能会导致设备损坏/关机及可能的伤害。
解决方案
ADEV 8866TR型三量程热导气体分析仪是为二元混合气体**测量专门设计的， ADEV热导气体分析仪的高灵敏性和高**性注定了在此类应用中是理想的。
空气中的H2，CO2种的H2,CO2种的空气
ADEV 8866TR型热导分析仪具有很大的优势，可根据具体情况对仪表进行快速设置以满足用户不同的应用，既可以手动操作，也可以由本地选择器或远程客户DCS进行设置。
目前很多应用都是使用CO2作为惰性气体，在某些情况下，则需要选择为N2。在这种情况下，ADEV的热磁氧分析仪8863则是优的解决方案，，因为导热系数的测量原理方面，N2的敏感性是不够的，所以则选择热磁式氧分析仪8863用来**监控氮气中的空气含量。
注：ADEV是全球化工行业气体分析应用解决方案的，在气体分析领域具有40年的历史，其成熟的产品和气体分析系统已在全球很多优良的化工石化行业用户得到验证和认可，其产品主要是磁力机械式氧分析仪，热磁氧分析仪，氧化锆氧量分析仪，电化学微量氧分析仪，露点仪，高温湿度仪，热导氢分析仪，红外气体分析仪等，所有产品具有防爆认证，是欧洲有名化工协会ICCA推荐化工应用仪表。更多产品信息，请登陆www.adev.com.cn
Application
On Hydrogen-cooled generators, Hydrogen is circulated through hollow conductors in the generator to remove the heat that is generated by copper losses in the stator and rotor. Hydrogen is used since it’s a good heat transfer agent. During normal or on-line operation, Hydrogen purity must be maintained at a level between 95 and 99%, a level at which it’s non-explosive and will not support combustion.
In the start-up phase of a Hydrogen-cooled generator, the hollow conductors and, in fact, the inside of the generator itself will contain ambient air which must be purged with an inert gas (e.g. CO2 or N2) prior to introducing Hydrogen. Conversely, on shutdown the Hydrogen has to be purged with the inert gas before air is introduced.
In short, there are two basic requirements/applications for Hydrogen purity monitoring; first, to maintain Hydrogen purity for normal operation above the UEL (Upper Explosive Limit) of 74% H2 in Air and second, to monitor inert gas purge cycles; on start-up, to insure air is purged out before Hydrogen is added; and on shutdown, to insure Hydrogen is purged out prior to introducing air, to prevent explosive levels of H2 which will result in plant equipment damage/shutdown and possible injury to plant personnel.
Solution
ADEV model 8866TR Triple Range thermal conductivity analyser for binary mixtures is designed and thus ideally suited to providing the highly sensitive and accurate analyses for the required measurement:
H2 in Air H2 in CO2 Air in CO2
with the great advantage that all measures can be made with a unique analyser, simply setting the wanted range in accordance to the phase. Operation that can be manually made by a local selector or remotely by customer DCS.
In some cases, nowadays the use of N2 as inert gas is preferred to CO2. In this case, the thermoparamagnetic Oxygen analyser model 8863 in necessary for an accurate measure of Air in N2 because with thermal conductivity measuring principle the sensitivity of Air respect to N2 is not enough.
