响应面法优化新型曝气装置的充氧条件
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摘要
基于静态变螺距螺旋切割原理自主研发了一种高效低耗、易操作的新型溶氧曝气装置。运用响应面法研究了空气流量、液体流量、水体深度对标准氧转移系数、氧利用率和理论动力效率的影响。结果表明,当空气流量为0.5 m~3/h、液体流量为10 m~3/h、水体深度为0.3 m时,新型溶氧曝气装置的标准氧转移系数、氧利用率、理论动力效率分别为1.4394 min~(-1)、37%、7.4388 kg O_2/(kW·h);装置较传统曝气设备具有显著优势。粒径分布测定结果表明,61.31%的气泡粒径集中在0.1μm以下,37.27%的气泡粒径集中在20～75μm,表明新型曝气设备所产生的气泡属于微纳米气泡;该装置可用于水体增氧、养殖、黑臭水体修复和污水处理等方面,应用前景广阔。
Based on the principle of static variable-pitch helical cutting, a new type of dissolved oxygen aeration device was developed with high oxygen transfer efficiency, low energy consumption and easy-operation.Response surface method was used to investigate the effects of air flow, liquid flow and water depth on the standard oxygen transfer coefficient, oxygen utilization efficiency and theoretical power efficiency.The results showed that the aeration device achieved a better oxygenation performance over traditional aeration equipment when the air flow rate was 0.5 m~3/h, the liquid flow rate was 10 m~3/h and the water depth was 0.3 m.For example, standard oxygen transfer coefficient was 1.4394 min-, oxygen utilization efficiency was 37% and theoretical power efficiency was 7.4388 kg O_2/(kW·h).Particle size distribution showed that 61.31% of the bubbles generated by the new aeration device was less than 0.1 μm and 37.27% of that was in 20～75 μm,indicating that the generated bubbles belong to the micro-nanometer bubbles.Therefore,the developed aeration device can be a promising aeration method in terms of water oxygenation, aquaculture, black and odor water body remediation, and sewage treatment.
Based on the principle of static variable-pitch helical cutting, a new type of dissolved oxygen aeration device was developed with high oxygen transfer efficiency, low energy consumption and easy-operation.Response surface method was used to investigate the effects of air flow, liquid flow and water depth on the standard oxygen transfer coefficient, oxygen utilization efficiency and theoretical power efficiency.The results showed that the aeration device achieved a better oxygenation performance over traditional aeration equipment when the air flow rate was 0.5 m~3/h, the liquid flow rate was 10 m~3/h and the water depth was 0.3 m.For example, standard oxygen transfer coefficient was 1.4394 min-, oxygen utilization efficiency was 37% and theoretical power efficiency was 7.4388 kg O_2/(kW·h).Particle size distribution showed that 61.31% of the bubbles generated by the new aeration device was less than 0.1 μm and 37.27% of that was in 20～75 μm,indicating that the generated bubbles belong to the micro-nanometer bubbles.Therefore,the developed aeration device can be a promising aeration method in terms of water oxygenation, aquaculture, black and odor water body remediation, and sewage treatment.
引文
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[15]夏玉峰,杨显红,郑晓凯,等.基于响应面法的钩尾框渐进热弯曲工艺多目标优化[J].中南大学学报(自然科学版),2014,45(9):2977-2984.
[16]鲍旭腾,陈庆余,徐志强,等.微纳米气泡技术在渔业水产行业的研究进展及应用综述[J].净水技术,2016, 35(4):16-22.
[17] TEMESGEN T, BUI T T, HAN H. Micro and nanobubble technologies as a new horizon for water-treatment techniques:A review[J]. Advances in Colloid and Interface Science, 2017, 246(6):40-51.
[2] AGARWAL A, NG W J, LIU Y. Principle and applications of microbubble and nanobubble technology for water treatment[J].Chemosphere, 2011, 84(9):1175-1180.
[3]李恒震.微纳米气泡特性及其在地下水修复中的应用[D].北京:清华大学,2014.
[4] HU L, XIA Z. Application of ozone micro-nano-bubbles to groundwater remediation[J]. Journal of Hazardous Materials, 2018, 342(8):446-453.
[5] SHARIFUZZAMAN M D, YANG H N, PARK S M, et al. Performance comparison of micro-nano bubble, electro-oxidation and ozone pre-treatment in reducing fluoride from industrial wastewater[J]. Engineering in Agriculture, Environment and Food, 2017,10(3):186-190.
[6]蔡博,夏国栋,杨光,等.螺杆槽道内气液两相流流型及压降特性研究[J].工程热物理学报,2016(8):1690-1695.
[7]王树立,饶永超,武玉宪,等.水平管内气液两相螺旋流实验研究[J].实验力学,2013,28(1):77-86.
[8] USHIKUBO F Y, FURUKAWA T, NAKAGAWA R, et al. Evidence of the existence and the stability of nano-bubbles in water[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2010, 361(1-3):31-37.
[9]陆晖.微纳米曝气氧传质特性及对景观水体修复效果研究[D].南宁:广西大学,2015.
[10] LI H, HU L, SONG D, et al. Characteristics of micro-nano bubbles and potential application in groundwater bioremediation[J].Water Environment Research, 2014, 86(9):844-851.
[11]卓晓锋.新型微纳米气泡发生装置的改进及在处理含铬(Ⅵ)废水中的应用[D].开封:河南大学,2014.
[12]徐振华,赵红卫,方为茂,等.金属微孔管制造微气泡的研究[J].环境污染治理技术与设备,2006, 7(9):78-82.
[13] MAKKI M M, AHMED B, CHOKRI B. Reliability prediction of the stress concentration factor using response surface method[J].The International Journal of Advanced Manufacturing Technology,2018, 94(1-4):817-826.
[14]曝气器清水充氧性能测定:CJT 3015.2—1993[S].
[15]夏玉峰,杨显红,郑晓凯,等.基于响应面法的钩尾框渐进热弯曲工艺多目标优化[J].中南大学学报(自然科学版),2014,45(9):2977-2984.
[16]鲍旭腾,陈庆余,徐志强,等.微纳米气泡技术在渔业水产行业的研究进展及应用综述[J].净水技术,2016, 35(4):16-22.
[17] TEMESGEN T, BUI T T, HAN H. Micro and nanobubble technologies as a new horizon for water-treatment techniques:A review[J]. Advances in Colloid and Interface Science, 2017, 246(6):40-51.