时维才,陈俊旭,宋奇,陈普,刘平,张友法.仿生超浸润核桃壳滤料制备及其采油污水处理性能研究[J].表面技术,2023,52(7):315-324.
SHI Wei-cai,CHEN Jun-xu,SONG Qi,CHEN Pu,LIU Ping,ZHANG You-fa.Fabrication of Walnut Shell Filter with Superwettability and Its Performance in Oily Water Treatment[J].Surface Technology,2023,52(7):315-324 |
| 仿生超浸润核桃壳滤料制备及其采油污水处理性能研究 |
| Fabrication of Walnut Shell Filter with Superwettability and Its Performance in Oily Water Treatment |
| |
| DOI：10.16490/j.cnki.issn.1001-3660.2023.07.029 |
| 中文关键词: 核桃壳滤料 润湿性 油水分离 超亲水/水下超疏油 |
| 英文关键词:walnut shell filter wettability oil-water separation hydrophilic and underwater oleophobicity |
| 基金项目:国家自然科学基金(52071076) |
|
|
| Author | Institution |
| SHI Wei-cai | Research Institute of Petroleum Engineering Technology of Jiangsu Oilfield, Jiangsu Yangzhou 225009, China |
| CHEN Jun-xu | School of Materials Science and Engineering, Southeast University, Nanjing 214135, China;Jiangsu Key Laboratory of Advanced Metal Materials Technology, Nanjing 211189, China |
| SONG Qi | Research Institute of Petroleum Engineering Technology of Jiangsu Oilfield, Jiangsu Yangzhou 225009, China |
| CHEN Pu | School of Materials Science and Engineering, Southeast University, Nanjing 214135, China;Jiangsu Key Laboratory of Advanced Metal Materials Technology, Nanjing 211189, China |
| LIU Ping | School of Materials Science and Engineering, Southeast University, Nanjing 214135, China;Jiangsu Key Laboratory of Advanced Metal Materials Technology, Nanjing 211189, China |
| ZHANG You-fa | School of Materials Science and Engineering, Southeast University, Nanjing 214135, China;Jiangsu Key Laboratory of Advanced Metal Materials Technology, Nanjing 211189, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 通过对油田含油污水处理用核桃壳滤料进行润湿性改性，研究其是否能够有效提高核桃壳滤料对采出水的过滤效果，并选出最优改性方法，验证其改性稳定性和长效性。方法 选用粒径为1~3 mm的核桃壳滤料颗粒，经清洗干燥后分别用含氟的超双疏改性液、含辛基硅烷的超疏水超亲油改性液，以及含气相二氧化硅和环氧树脂的超亲水改性液进行润湿性改性，随后对其润湿性分离性能进行评价，并选出最优改性方案，研究改性后滤料的实地服役能力。结果 以核桃壳滤料为基础，通过表面修饰改性方法制备出具有超疏水/超疏油、超疏水/超亲油、超亲水/水下超疏油特性的核桃壳滤料，并通过过滤实验比较了未处理核桃壳滤料和这3种滤料的过滤效果，其过滤效率分别为57.62%、65.77%、61.26%、84.01%，反冲洗液的含油量分别为487.1、172.4、505.8、786.4 mg/L，超亲水/水下超疏油滤料的过滤效率和反洗液含油量最高，表明超亲水/水下超疏油核桃壳滤料可以提升过滤效果，并增强其反洗能力，可作为填充滤料;现场试验结果表明，经超亲水滤料过滤后的水质显著改善，浊度最高降低了83.4%，反冲洗周期≥24 h，展现出良好的应用价值和潜力;进一步探究了核桃壳滤料粒径、滤柱高度、过滤批次等参数对过滤效果的影响，明确指出若要达到较为理想的过滤效果，需对滤料进行级配，且填充高度需合理。结论 超亲水/水下超疏油滤料的过滤效率和反洗液含油量最高，可以提升过滤效果，并增强反洗能力，能够有效改善油田采出水现场过滤表现。 |
| 英文摘要: |
| The walnut shell filter material is widely used as filling material in filtration equipment due to its low cost, strong adsorption and sewage interception capacity. However, the filter material will be gradually contaminated by oil with the increase of service time, resulting in poor filtration effect and poor back-washing efficiency. To solve these problems, the wettability theory based on the lotus leaf effect is applied to the walnut shell filter material. The walnut shell filter material was endowed with superhydrophilicity. The superhydrophilic surface had strong hydration. When the coating surface was wetted by water, a water film was quickly formed on the coating. Due to the incompatibility between the water phase and oil phase, the superhydrophilic coating protected by water film was not easy to be contaminated by oil, so the superhydrophilic surface had excellent anti-fouling performance underwater, showing good underwater oleophobicity. For the parallel experiments, the walnut shell filter material was endowed with superhydrophobicity/superoleophilicity and superamphiphobicity, respectively. The filtration efficiency and long-term performance of walnut shell filters with different wettability were studied. During the experimental process, the walnut shell filter material with the particle size of 1-3 mm was selected. The superhydrophobic modifier was obtained from an ethanol solution of silica sol and fluorosilane. Superhydrophobic and superoleophilic modifier was obtained from ethanol solution of octylsilane and silica sol. A superhydrophilic modifier was obtained from an aqueous solution containing fumed silica and epoxy resin. Then, the filtration performance and long-term performance of walnut shell filter media with different wettability were comprehensively analyzed based on the oil content of the filtrate, the turbidity of the filtrate and the filtration pressure. The results indicated that the superhydrophilic walnut shell filter material showed the best filtration performance and long-term performance. The filtration efficiency of untreated walnut shell filter and these three kinds of filter media was 57.62%, 65.77%, 61.26% and 84.01%, respectively. After filtration by superhydrophilic filter material, the oil content of back-washing liquid was 487.1, 172.4, 505.8 and 786.4 mg/L, respectively and the removal rate of filtrate turbidity was 83.4%. Besides, the back-washing cycle was more than 24 hours, showing good application value and potential. In short, the superhydrophilic filter material had the best filtration effect and the best back-washing ability. In addition, the effect of filtration parameters such as particle size, filter column height, and filtration batch on the filtration effect was further explored. The results showed that the filtration effect increased with the decrease of filter particle size. After filtration by the walnut shell filter with a particle size of 1-2 cm, the oil content of the filtrate was 34.06 mg/L. The filtration efficiency was 50% higher than that of the walnut shell filter with a particle size of 2-3 cm. Besides, the filtration effect increased with the filter column height. After filtration by the walnut shell filter with the filter column height of 5 cm, the oil content of filtrate was 34.06 mg/L, while that of the walnut shell filter with the filter column height of 10 cm was 31.45 mg/L. However, the higher the height of the filter column, the more difficult the back-washing was. Hence, when the filter column height was 5 cm, the walnut shell filter showed the best filtration performance. In short, the hydrophilic and hydrophobic filter material has the best filtration effect and the best back-washing ability. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号