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solid- liquid phase separation and resource recycling study for waste rolling oily sludge

Baosteel Technical Research 2015年第1期9卷 33-41页

作者： SHI Lei Research Institute Baoshan Iron & Steel Co. Ltd.

On the basis of the characteristics of a highly emulsified solid-liquid phase （fine particles, sticky consistency,black color, and low reuse ratio）, waste rolling oily sludge has been a focal problem in the steel industry. In this article, a solid-liquid phase separation and resource recycling process was described, with pilot test results showing that flocculation-sedimentation is an effective pretreatment, and that the filtration-coagulationvacuum distillation process is simple and feasible with a 53.5% recovery rate for regenerated oil that is qualified for return to the roiling production line. Then,solid phase oil-sludge was extracted by solvents with a 77% metal resource recovery rate and a wide utilization range. Finally, according to the experimental results, a set of feasibility plans for a 50 t/a waste rolling oily sludge solid-liquid separation and resource recycle project was designed, with the expectation of 50% regenerated oil yield, 70% solid metal resource recovery, and a 2. 5-year investment payback period.

关键词： waste rolling oily sludge regeneration of waste oil solid-liquid separation flocculation distillation

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Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank

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Chinese Journal of Chemical Engineering 2022年第1期35卷 176-192页

作者： Qianqian Kang Jinfan Liu Xin Feng Chao Yang Jingtao Wang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering Sichuan UniversityChengdu 610065China

Laminar mixing in the stirred tank is widely encountered in chemical and biological *** mixing regions(IMRs)usually exist when the fluid medium has high viscosity,which are not conducive to *** this work,the researches on IMRs,enhancement of laminar mixing and the phenomenon of particle clustering within IMRs are *** most studies,the aim is to destroy IMRs and improve the chaotic *** this end,the mechanism of chaotic mixing and the structure of IMRs were well *** methods developed to destroy IMRs include off-centered agitation,dynamic mixing protocol,special designs of impellers,baffles,*** addition,the methods to characterize the shape and size of IMRs as well as mixing effect by experiments and simulations are ***,IMRs are not always nuisance,and it may be necessary in some ***,the present engineering applications are summarized,and the prospect of the future application is *** example,particle clustering will form in the co-existing system of chaotic mixing and IMRs,which can be used for solid–liquid separation and recovery of particles from high viscosity fluid.

关键词： Laminar mixing Stirred tank Isolated mixing regions Particle clustering solid-liquid separation

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Bio-inspired Filter Design Based on Vortex Control Mechanism of Parallel Groove Structure

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Journal of Bionic Engineering 2023年第1期20卷 338-348页

作者： Yawei Zhu Dean Hu Yonggang Guo Hao Ding Gang Yang School of Mechanical and Electrical Engineering Henan University of TechnologyZhengzhou450001China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipments Ministry of EducationHunan UniversityChangsha410082China

solid–liquid separation is widely used in daily life and practical *** industrial filters are prone to clogging,but this rarely occurs in filter-feeding *** by the filter feeding mechanism of balaenid whales and considering the local grooves in the fringes layer,a new bionic filter is produced by 3D printing technology through the bionic design of the parallel channels inside the mouth of balaenid *** the same time,a test platform composed of the bionic filter,peristaltic pump,fluid pulse rectifier and water tank is built to carry out the fluid flow pattern dyeing and particle filtration *** is found that fluid separation occurs near the groove structure and local vortices are *** vortex control filtration mechanism makes the particles in the front grooves tend to accumulate on the left side,which has a certain anti-clogging ***,the increase of flow velocity leads to the enhancement of vortices,which makes the accumulation effect on the left more *** study initially practices the bionic application from biological model to engineering design,and the vortex control anti-clogging filtration mechanism proposed in the study has a wide range of application prospects and values.

关键词： solid-liquid separation Balaenid whales Filter feeding-Bionic design Anti-clogging filtration mechanism

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Effect of preozonation on improvement of settleability of solid in highly concentrated organic wastewater of Japanese wheat and sweet potato spirit-distillery

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Journal of Environmental Sciences 2004年第2期16卷 230-233页

作者： MasafumiTateda MasanoriFujita MichihikoIke QUIYen-feng SatoruKokubo CollegeofEnvironmentalTechnology ToyamaPrefecturalUniversityJapan. DepartmentofEnvironmentalEngineering GraduateSchoolofEngineeringOsakaUniversityJapan EspecCo. Ltd.Japan JCEngineeringCo. Ltd.Japan

solid-liquid separation of the wastewater is very difficult because of high viscosity and high SS concentration. In this study, the effectiveness of preozonation on improving the settleability of the solids in wheat and sweet potato wastewaters was investigated using a bench-scale system and pilot treatment system respectively. Results showed that solid-liquid separation in the wheat wastewater was greatly improved by the decanter in the system(SS reduction from 24100 mg/L to 100 mg/L). However, preozonation practice did not show a significant effect on solid-liquid separation of the sweet potato wastewater. Effect of preozonation on solid-liquid separation between wheat and sweet potato wastewater showed different.

关键词： Japanese spirit-distillery wastewater wheat wastewater sweet potato wastewater London dumping convention ozonation sett leability solid-liquid separation

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