Measurement of phase holdup in gas-liquid-solid three-phase flow based on CCERT and acoustic emission
-
摘要:
传统的相含率测量方法在测量三相流相含率时只能对某单一相进行检测,针对此问题,基于电容耦合电阻层析成像(CCERT)技术与声发射技术,建立了相含率测量模型,提出了一种三相流各相相含率的非侵入式测量方法。利用偏最小二乘回归法,在静态情况下建立CCERT技术的相含率测量模型,同时在鼓泡床上进行动态实验,采用差压法进行同步测量作为参考值验证模型的有效性,实现了对两相相含率的非接触测量。在此基础上,通过对声发射技术采集到的声音信号进行处理,建立声发射技术的气相相含率预测模型,利用该模型测量出三相体系中的气相相含率,结合CCERT技术测量出三相体系中的不导电相相含率,从而利用非侵入式测量方法得到三相流中的各相相含率。
Abstract:The traditional method to measure the phase holdup of three-phase flow is only for some single phase. In order to solve this problem, models to predict the phase holdup were established and a non-invasive method was proposed for the measurement of each phase holdup in three-phase flow based on capacitively coupled electrical resistance tomography (CCERT) and acoustic emission. Firstly, the phase holdup measurement model of gas-water two-phase flow was established by using partial least squares regression method in the static case. Meanwhile, the dynamic experiments that compare the method with the differential pressure method to verify the validity of the modelwere carried out on bubbling bed to fulfill the non-invasive measurement of the two-phase phase holdup. On this basis, the measurement model of gas holdup was established through processing the sound signals collected by acoustic emission system. Then, the gas holdupis measured in three-phase system by using the model and is combined with the non-conductive phase holdup measured by CCERT.Thus each phase holdup in three-phase flow is obtained in a non-invasive way.
-
-
[1] 赵光辉, 姜伟, 牛欣宇, 等.航空生物燃料制备技术及应用前景[J].中外能源, 2014, 19(8):30-34. http://d.wanfangdata.com.cn/Periodical/zwny201408005ZHAO G H, JIANG W, NIU X Y, et al.Jet fuel preparation technology and application prospects[J].Sino-Global Energy, 2014, 19(8):30-34(in Chinese). http://d.wanfangdata.com.cn/Periodical/zwny201408005 [2] 马俊国, 葛庆杰, 马现刚, 等.浆态床反应器中生物质合成气合成二甲醚的研究[J].燃料化学学报, 2012, 40(7):843-847. http://d.wanfangdata.com.cn/Periodical/rlhxxb201207012MA J G, GE Q J, MA X G, et al.DME synthesis from biomass-derived syngas in a slurry-bed reactor[J].Journal of Fuel Chemistry and Technology, 2012, 40(7):843-847(in Chinese). http://d.wanfangdata.com.cn/Periodical/rlhxxb201207012 [3] 李海青, 黄志尧.特种检测技术及应用[M].杭州:浙江大学出版社, 2000.LI H Q, HUANG Z Y.Special testing technology and its application[M].Hangzhou:Zhejiang University Press, 2000(in Chinese). [4] GAS B, DEMJANENKO M, VACIK J.High-frequency contactless conductivity detection in isotachophoresis[J].Journal of Chromatography, 1980, 192(2):253-257. doi: 10.1016/S0021-9673(80)80001-X [5] ZEMANN A J, SCHNELL E, VOLGGER D, et al.Contactless conductivity detection for capillary electrophoresis[J].Analytical Chemistry, 1998, 70(3):563-567. doi: 10.1021/ac9707592 [6] DA SILVA J A F, DO LAGO C L.An oscillometric detector for capillary electrophoresis[J].Analytical Chemistry, 1998, 70:4339-4343. doi: 10.1021/ac980185g [7] WANG B L, HU Y Y, JI H F, et al.A novel electrical resistance tomography system based on C4D technique[J].IEEE Transactions on Instrumentation and Measurement, 2013, 62(5):1017-1024. doi: 10.1109/TIM.2013.2246912 [8] JOSHI J B, RANADE V V, GHARAT S D, et al.Sparged loop reactors[J].Canadian Journal of Chemical Engineering, 1990, 68(5):705-741. https://www.researchgate.net/publication/229617421_Sparged_loop_reactors [9] CHRISTOPHE B, ANNE-MARIE D, GABRIEL W.Measuring techniques in gas-liquid and gas-liquid-solid reactors[J].Chemical Engineering Science, 2002, 57(16):3185-3215. doi: 10.1016/S0009-2509(02)00193-8 [10] HEWITT G F.Measurement of two phase flow parameters[M].London:Academic Press, 1978. [11] HUANG Z Y, WANG B L, LI H Q.Application of electrical capacitance tomography to the void fraction measurement of two-phase flow[J].IEEE Transactions on Instrumentation and Measurement, 2003, 52(1):7-12. doi: 10.1109/TIM.2003.809087 [12] ADAM M S, YANG W Q, WATSON R A.Capacitance tomographic system for the measurement of void fraction in transient cavitation[J].Journal of Hydraulic Research, 1998, 36(4):707-719. doi: 10.1080/00221689809498617 [13] 王化祥, 曹章.电阻抗层析成像系统"软场"非线性特性——基于统计的方法[J].天津大学学报, 2006, 39(5):543-547. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=tjdx200605007&dbname=CJFD&dbcode=CJFQWANG H X, CAO Z.Nolinearity of "soft" field in electrical impedance tomography system-Based on statistical methods[J].Journal of Tianjin University, 2006, 39(5):543-547(in Chinese). http://kns.cnki.net/KCMS/detail/detail.aspx?filename=tjdx200605007&dbname=CJFD&dbcode=CJFQ [14] 门卓武, 阙国和, BECHKISH A, 等.操作变量对大型浆态床反应器流体力学特性的影响[J].化工学报, 2002, 53(1):4-10. http://d.wanfangdata.com.cn/Periodical/hgxb200201003MEN Z W, QUE G H, BECHKISH A, et al.Effect of operating variables on hydrodynamics in large scale slurry bubble column reactor[J].Journal of Chemical Industry and Engineering, 2002, 53(1):4-10(in Chinese). http://d.wanfangdata.com.cn/Periodical/hgxb200201003 [15] WANG J D, WANG Y X, REN C J, et al.Determination of flooding/loading transition using acoustic emission measurement[J].Quimica Nova, 2013, 34(9):1651-1655. https://www.researchgate.net/publication/267790274_DETERMINATION_OF_FLOODINGLOADING_TRANSITION_USING_ACOUSTIC_EMISSION_METHOD [16] 王云兴. 搅拌釜反应器相含率测量的研究[D]. 杭州: 浙江大学, 2010: 49-52. http://cdmd.cnki.com.cn/Article/CDMD-10335-2010062536.htmWANG Y X.Research on phase holdup measurement in stirredtank reactor[D].Hangzhou:Zhejiang University, 2010:49-52(in Chinese). http://cdmd.cnki.com.cn/Article/CDMD-10335-2010062536.htm [17] 韩玉环, 靳海波.采用电阻层析成像技术测量三相外环流反应器中相含率的实验研究[J].过程工程学报, 2009, 9(3):431-436. http://d.wanfangdata.com.cn/Periodical/hgyj200903003HAN Y H, JIN H B.Experimental study on phase holdup in three-phase external loop airlift reactors using electrical resistance tomography[J].The Chinese Journal of Process Engineering, 2009, 9(3):431-436(in Chinese). http://d.wanfangdata.com.cn/Periodical/hgyj200903003