ADEV 8866TR熱導(dǎo)氫氣分析儀應(yīng)用于氫冷發(fā)電機組
關(guān)鍵詞: 熱導(dǎo)氣體分析儀,氧化鋯氧量分析儀,熱導(dǎo)氫氣分析儀,熱磁氧分析儀 發(fā)電機組
應(yīng)用
在氫冷式發(fā)電機組，氫氣通過在發(fā)電機中的空心導(dǎo)體的循環(huán)以除去通過在定子和轉(zhuǎn)子中銅損產(chǎn)生的熱量。氫氣是一個很好的傳熱劑而被廣泛使用。在通?；蛟诰€運行期間，氫氣純度必須保持在95％到99％之間，在這個區(qū)間氫氣不會爆炸或燃燒是**的。
在氫冷發(fā)電機的啟動階段，空心導(dǎo)體和發(fā)電機內(nèi)部本身都被周圍空氣包圍，在用氫氣吹掃之前，需要用一種惰性氣體（如二氧化碳或氮氣）吹掃。相反，在關(guān)機時的氫在空氣被引入之前，也必須用惰性氣體吹掃。
總的來說，必須要測量氫氣純度有2個原因，，要保持氫氣純度的正常運行，氫氣純度必須要在UEL（爆炸上限）74％H2以上才能保證氫氣空氣混合不會爆炸。**，監(jiān)測惰性氣體吹掃周期啟動起來，以確?？諝獯祾咧凹尤霘錃夂完P(guān)斷，以確保**氫氣之前引入空氣，以防止爆炸性H2的水平，因為這可能會導(dǎo)致設(shè)備損壞/關(guān)機及可能的傷害。
解決方案
ADEV 8866TR型三量程熱導(dǎo)氣體分析儀是為二元混合氣體**測量專門設(shè)計的， ADEV熱導(dǎo)氣體分析儀的高靈敏性和高**性注定了在此類應(yīng)用中是理想的。
空氣中的H2，CO2種的H2,CO2種的空氣
ADEV 8866TR型熱導(dǎo)分析儀具有很大的優(yōu)勢，可根據(jù)具體情況對儀表進行快速設(shè)置以滿足用戶不同的應(yīng)用，既可以手動操作，也可以由本地選擇器或遠(yuǎn)程客戶DCS進行設(shè)置。
目前很多應(yīng)用都是使用CO2作為惰性氣體，在某些情況下，則需要選擇為N2。在這種情況下，ADEV的熱磁氧分析儀8863則是優(yōu)的解決方案，，因為導(dǎo)熱系數(shù)的測量原理方面，N2的敏感性是不夠的，所以則選擇熱磁式氧分析儀8863用來**監(jiān)控氮氣中的空氣含量。
注：ADEV是全球化工行業(yè)氣體分析應(yīng)用解決方案的，在氣體分析領(lǐng)域具有40年的歷史，其成熟的產(chǎn)品和氣體分析系統(tǒng)已在全球很多優(yōu)良的化工石化行業(yè)用戶得到驗證和認(rèn)可，其產(chǎn)品主要是磁力機械式氧分析儀，熱磁氧分析儀，氧化鋯氧量分析儀，電化學(xué)微量氧分析儀，露點儀，高溫濕度儀，熱導(dǎo)氫分析儀，紅外氣體分析儀等，所有產(chǎn)品具有防爆認(rèn)證，是歐洲有名化工協(xié)會ICCA推薦化工應(yīng)用儀表。更多產(chǎn)品信息，請登陸m.photolibs.com
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.
