Exergy destruction analysis of heat exchanger in waste heat recovery system in Kroll process
Exergy destruction analysis of heat exchanger in waste heat recovery system in Kroll process
复制标题
克罗尔法余热回收系统换热器火用破坏分析
DOI：
10.1504/ijex.2017.081204
复制
发表时间：
2017-01-01
影响因子：
1.3
通讯作者：
Wu, Fuzhong
中科院分区：
文献类型：
--
作者：
Wang, Wenhao;Wu, Fuzhong
在克罗尔工艺余热回收系统的中试试验中，能量效率和（火用）效率仅为30%和10%，且没有对该系统进行评价。本文采用火用破坏分析方法研究了系统的传热和效率。流速为0.12 kg/s、0.14 kg/s和0.16 kg/s的水被迫通过管壳式热交换器，而空气流速为22 m3/min，温度范围为350 ℃，类似于380 ℃。结果表明，较高的空气入口温度对各项指标都有利，而较大的水质量流量仅对传热率、不可逆传热率和水侧不可逆比有利。能量效率和（火用）效率也有类似的变化趋势。从能量的质和量的角度来看，所测试的管壳式换热器系统仍然可以用于克罗尔工艺的余热回收。
In pilot-scale tests of a waste heat recovery system designed for Kroll process, energy and exergy efficiency were only 30% and 10%, and there is no judgement about this system. In present work, the exergy destruction analysis is used to investigate heat transfer and effectiveness of the system. The water with the flow rate of 0.12 kg/s, 0.14 kg/s and 0.16 kg/s is forced across a shell-tube heat exchanger, while the air flow rate is 22 m(3)/min with a temperature range of 350 similar to 380 degrees C. The results show that higher air inlet temperature is good for all indicators, while greater water mass flow rate is only good for heat transfer rate, irreversible heat transfer rate and water side irreversibility ratio. The energy and exergy effectiveness have a similar trend. From the viewpoint of energy quality and quantity, the tested shell-and-tube heat exchanger system can still be used to recover waste heat in Kroll process.