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Characteristic research of regeneration process of particulate filter medium in vibrated fluidized bed

Clean Energy 2023年第6期7卷 1189-1198页

作者： Bing Liu Lixin He Xianglong Zhao Yi Guo Clean Coal Technology Center National Institute of Clean-and-Low-Carbon EnergyChina Energy GroupFuture Science CityChangping DistrictBeijing 102211P.R.China

The vibrational fluidized bed is innovatively adopted to regenerate the particulate filter medium for the purification of crude syn-thesis gas from the coal gasification *** research of vibrated fluidized beds during dust-containing particulate filter medium regeneration has been carried *** ideal transport model of particulate filter medium on the distributor is estab-lished and verified by using *** mean residence time of the particulate filter medium can be reduced by 72%from 5.5 to 1.5 min with an increase in the working frequency from 50 to 60 *** thickness of the bed layer is linearly increased with the feeding rate of the particulate filter medium under ideal working *** resistance models of the fluidizing air are built up and validated,and they can be used to calculate the pressure drop of the static bed layer of the particulate filter medium on the flu-idizing air distributor,which is the maximum value of the dynamic bed layer with the same *** fluidizing air makes the mean residence time of the particulate filter medium decrease by 50%and reduces the difference in the particulate mean residence time under different feeding-rate *** regeneration effect of dust-containing filter medium particles in a vibrated fluidized bed is *** air with superficial velocity ranging from 0 to 0.6~0.9 m·s-1 makes the regeneration efficiency increase from 29.41%to 70.59~88.24%.This article provides a reference for the industrial application of a vibrated fluidized bed for the par-ticulate filter medium recycling system.

关键词： vibrated fluidized bed filter medium residence time pressure drop separation efficiency coal gasification

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Porous Haydite Used as Waste Water filter medium for Lake Sludge

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Journal of Wuhan University of Technology(Materials Science) 2013年第3期28卷 544-547页

作者：何永佳 ZHAO Qiang U Linnu HU Shuguang State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) School of Materials Science & Engineering Wuhan University of Technology Wuhan Clean Water Science & Technology CO. LTD School of Science Wuhan University of Technology

Porous haydite used as waste filter medium was prepared by dreging lake sludge to help solve the treatment problem of sludge and realize its reclamation. Several calcination regimes were considered and their effects on the pore structure and the properties such as the strength, the density, the filtering ability and the phosphate absorption ability of the haydite were investigated, For the mixture of 60% lake sludge and 40% fly ash in this experiment, the calcination regime with a pre-caleination period at about 600℃, a temperature keeping period at 1 200 ℃ and a moderate cooling rate are recommended to prepare haydite with reasonable pore structure and good performances for its usage as the waste water filter media.

关键词： filter medium haydite lake sludge waste water

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Integration of high-rate filtration using waste-derived biochar as a potential sustainable technology for drinking water supply

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Biochar 2023年第1期5卷 1075-1097页

作者： Fernando García-Ávila Andrés Galarza-Guamán Mónica Barros-Bermeo Emigdio Antonio Alfaro-Paredes Alex Avilés-Añazco Sergio lglesias-Abad Carrera de Ingeniería Ambiental Facultad de Ciencias QuímicasUniversidad de CuencaCuencaEcuador Departamento de Química Aplicada y Sistemas de Producción Grupo de Evaluación de Riesgos Ambientales en Sistemas de Producción y Servicios(RISKEN)CuencaEcuador Professional School of Systems Engineering Research Institute of Science and TechnologyUniversidad César VallejoLimaPeru Carrera de Ingeniería Ambiental Universidad Católica de CuencaCuencaEcuador

This research aimed to evaluate the efficiency of eucalyptus(E)and bamboo(B)residual biomass biochars as filter materials for drinking water *** efficiencies of these two biochars in the rapid filtration process were evaluated using water(raw,flocculated and settled)at the rate of 120 m^(3)/m^(2)/*** that bamboo biochar manufactured under a slow pyrolysis process"b"(Bb)had the best ***,Bb was evaluated with three different granulometries,and it was found that the effective size with the best performance was the finest(0.6-1.18 mm).Subsequently,this biochar was compared with conventional filter materials such as gravel,sand and anthracite,using different types of water(raw,flocculated and settled)and at different filtration rates(120 and 240 m^(3)/m^(2)/d),and it was found that the filter material with the best performance was precisely biochar,with average removal efficiencies of 64.37%turbidity and 45.08%colour for raw water;93.9%turbidity and 90.75%colour for flocculated water,and 80.79%turbidity and 69.03%colour for settled *** efficiency using simple beds of sand,biochar,anthracite and gravel at the rate of 180 m^(3)/m^(2)/d was 75.9%copper,90.72%aluminium,95.7%iron,10.9%nitrates,94.3%total coliforms and 88.9%fecal *** efficiencies achieved by biochar were higher compared to those of conventional filter *** was also found that biochar contributes to improving the performance of sand and anthracite in mixed ***,it was possible to demonstrate that the volume of washing water required for the biochar is lower compared to the other filter ***,it is recommended to carry out more tests for the purification of water with biochars from rural areas affected by the mining and oil exploitation,as well as the purification of seawater with biochars from coastal areas with residues from dry forests and organic residues from municipalities.

关键词： Biochar filter medium Rapid filtration Pyrolysis Eucalyptus Bamboo

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Efficiency of locally available filter media on fluoride and phosphate removal for household water treatment system

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Chinese Journal of Population,Resources and Environment 2014年第2期12卷 110-115页

作者： Mekonnen Birhane Alebel Abebe Esayas Alemayehu Embialle Mengistie School of Environmental Health Science and Technology Jimma University

Since conventional water treatment is not affordable in developing countries,looking for locally available and alternative treatment options is *** of fluoride and phosphate can be achieved by designing appropriate filtration media from different materials such as sand,calcined clay,pumice,scoria and bone *** study was designed to determine the removal efficiency of these locally available filter media with respect to detention time and *** filtration apparatuses(tank) were filled separately with stone,gravel with grain size 0.6-4.75 mm and 40 cm deep,sand(ES = 0.15—0.35 mm and UC = 1.5-3),calcined clay,pumice,scoria and bone char with grain size 0.25-0.5 *** samples were prepared using glass bottles with fluoride concentrations of 6 and 8 mg/1 and phosphate concentration of 4 mg/*** analysis was carried out before and after filtration to determine the removal efficiency of each *** was found that the highest removal of fluoride was achieved by bone char(89.65%),followed by pumice(82.4%).However,bone char has rather increased the concentration of phosphate by 63.8%.Sand was the most efficient media to remove phosphate,managing to remove by 70%.Therefore,it is an attractive option to use these locally available,environmental friendly and appropriate technologies for efficient removal of both fluorine and phosphate at the household or community water treatment level.

关键词： conventional water treatment methods chemical impurities filter medium detention time reduction potential fluoridated water

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Development and Application of TL-1 New High Temperature and High Pressure Plugging Instrument

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Open Journal of Yangtze Oil and Gas 2021年第3期6卷 107-115页

作者： Yanlin Zou Chunzhi Luo Baijing Wang Huan Zhang Chunjun Zhang College of Chemistry and Environmental Engineering Yangtze University Jingzhou China

In view of the fact that most of the filter media of existing plugging evaluation instruments use steel plates or steel balls, which cannot truly simulate the characteristics of the formation, a new type of TL-1 high temperature and high pressure plugging instrument has been developed. The filter medium of the instrument is the natural stone with different cracks and quartz sand beds with different particle sizes, which can better simulate the adsorption and hang-up effect of the formation on the plugging agent. It is possible to evaluate the plugging effect, pressure-bearing capacity and return pressure of the plugging slurry for different cracks and sand beds of different sizes under different temperatures and pressures. Using new and old instruments to evaluate the plugging effect of the same plugging slurry, it is found that the plugging effect is different from the distribution of the plugging material on the crack surface, the plugging effect and the pressure bearing capacity. The instrument is stable and reliable in operation and simple in operation. It is a new instrument for conducting research on anti-leakage plugging materials and anti-leakage plugging drilling fluid systems.

关键词： Plugging Device filter medium Plugging Experiment Plugging Formula

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