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Chloride and potassium control in closed kraft mill liquor cycles.

机译：在封闭的牛皮纸制浆循环中控制氯化物和钾。

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The mass flow rate of recycled flue gas dust, electrostatic precipitator dust and ash hopper dust, in kraft recovery boilers was quantified. The fluctuation of the recycled dust mass flow rate during normal operation of the boiler was evaluated. The effects of four modifications in boiler operating parameters on the recycled dust flow rate were determined.; The results show that the recycle dust varies between 3.6 and 9.8% of the as-fired black liquor solids. Following a five-hour shutdown of economizer sootblowers, approximately 10,000 kg of ash hopper dust was added to the black liquor over the one hour test period upon the start-up of the economizer sootblowers at mill 'A'. Analysis of the samples collected in both mills confirmed the enrichment of chloride and potassium in the recycled dust.; Based on two mill surveys, it was confirmed that the recycled dust mass flow rate fluctuates with normal operation of the recovery boiler. It is suggested that these fluctuations be considered in the design of the chloride and potassium removal system.
机译：对牛皮纸回收锅炉中烟气粉尘，静电除尘器粉尘和灰斗粉尘的质量流量进行了定量。评估了锅炉正常运行过程中回收粉尘质量流量的波动。确定了锅炉运行参数的四种修改对回收粉尘流量的影响。结果表明，再循环粉尘在煅烧黑液固体中介于3.6％和9.8％之间。在节煤器吹灰机停机五小时后，在工厂“ A”处启动节煤器吹灰机后，在一个小时的测试时间内，将约10,000千克的灰斗灰加到了黑液中。对在两个工厂中收集的样品的分析证实了回收粉尘中氯和钾的富集。根据两次工厂调查，可以确定，回收粉尘的质量流量随回收锅炉的正常运行而波动。建议在设计氯化物和钾去除系统时考虑这些波动。

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