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1.仪器测量氨厂半水煤气氧含量时,取样点选在什么地方最适宜? 答:仪器用于氮肥生产分析半水煤气中氧含量时,若取样点选择不正确,会造成仪器指示值波动较大,无法知道正确的氧含量。根据不少厂使用经验,取样点应选择在气柜出口,即煤气入口最为适宜。这是因为:(1)半水煤气在气柜中已经混合,所以测得的氧含量是平均氧含量,避免了指示值的波动;(2)半水煤气尚未经过煤气机压缩,温度低,煤焦油少,而且半水煤气流量也不受电压波动影响。
1 instrument measuring ammonia plant semi-water gas oxygen content, the sampling point where the most appropriate choice? A: The instrument for nitrogen production of semi-water gas in the oxygen content, if the sampling point is not correct, will cause the instrument indicator value fluctuations Large, can not know the correct oxygen content. According to the experience of many factories, sampling points should be selected in the gas cabinet exports, that is, the most appropriate gas inlet. This is because: (1) semi-water gas has been mixed in the gas tank, so the measured oxygen content is the average oxygen content, to avoid fluctuations in the indicated value; (2) semi-water gas has not yet been compressed by a gas engine, the temperature is low, coal tar Less, and semi-water gas flow is not affected by voltage fluctuations.