A hybrid method for combining High-Gradient Magnetic Separation and centrifugation for a continuous process

Lindner, Johannes; Nirschl, Hermann

doi:10.1016/j.seppur.2014.04.019

Cited by 16 publications

(13 citation statements)

References 26 publications

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“…Data from recorded values for QI, TI parameters in CT and CV factor of before and after centrifuging [22][23][24][25][26][27][28] are collected in period of receiving coal feed inlet to distillation column in the years 2017-2018 was gathered ( Table 2). These results are for two different feed samples of differing quality classified as received from batteries 1 and 3 of the steel plant.…”

Section: Analysis On Data Of Coal Tar Quality Determinationmentioning

confidence: 99%

“…During this period, CT storage tanks were sampled at 4-day intervals. The samples were centrifuged at a speed of 2000 rpm, equivalent to the operating conditions of the centrifuge used in the refinery [24][25][26][27][28] After performing a centrifugation step in the laboratory, the insoluble parameters of quinoline and toluene solvents and the coke content in the depot CT feed from batteries 1 and 3 were determined, the results of which are shown in Fig. 5.…”

Section: Analysis On Data Of Coal Tar Quality Determinationmentioning

confidence: 99%

“…For reducing the sedimentation of unreacted natural coke and values insoluble particles of CT, out-of range crude CT liquid is transferred to a mechanical filtering process unit. Figure 1 reveals the flow transferring process from the CT vapor to the distillation column using a filtration centrifuge process [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Preventing of flooding phenomena on vacuum distillation trays column via controlling coking value factor

2020

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The occurrence of flooding phenomena (FP) on the vacuum distillation trays column (VDTC) is investigated on a refinery in the middle region of Iran. Accumulation of coke sediment that is occasionally observed in refinery processing using coal tar (CT) feeding is the main reason of the FP on VDTC. This usually occurs at the down-comer areas and the seal pans of the column. Quinolone insoluble (QI) and toluene insoluble (TI) parameters, two routine methods used to measure coke containing sediments, are employed to determine probable critical areas of FP at the down-comers and the seal pans of CT feed in this study. Analyzing the obtained results of QI and TI tests demonstrated that FP at the column is directly related to the quality of CT feeding. For instance, when the QI of the inlet CT in battery 1 increases from 0.56%W in the first sample to 6.5%W in the 25th sample, the vacuum pressure at the top of the distillation column is reduced from − 230 mbar to − 420 mbar. To prevent sediment accumulation of coke and the occurrence of FP, the CT feeds are centrifuged to reduce coke sedimentation at the down-comer areas and the seal pans of VDTC. Moreover, the seal pan trays are replaced by normal ones and all moveable valves with 25 mm diameter on trays 15 and higher in the column, where coke sediment accumulation is observed the most, are modified by installing wider fixed valve (40 mm diameter) trays.

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Section: Analysis On Data Of Coal Tar Quality Determinationmentioning

confidence: 99%

Section: Analysis On Data Of Coal Tar Quality Determinationmentioning

confidence: 99%

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Preventing of flooding phenomena on vacuum distillation trays column via controlling coking value factor

2020

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“…Figure 8.9 left shows a decanter screw with a wire matrix implemented in the cylindrical part (Lindner and Nirschl 2014). Figure 8.9 right shows the complete decanter centrifuge set up at the Karlsruhe Institute of Technology.…”

Section: Setupmentioning

confidence: 99%

“…The parameters that influence the MEC process are already published (Lindner et al 2010;Lindner et al 2013a). A continuous discharge of the particles from the decanter wall is possible, one possibility is by a decanter screw (Lindner and Nirschl 2014). This is necessary in order to take advantage of the low-adsorption cycle times of micron-scaled particles.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Enhanced Centrifugation for Industrial Use

Lindner

Keller

Grim

et al. 2014

Upscaling of Bio-Nano-Processes

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Magnetically enhanced centrifugation is a new approach in high-gradient magnetic separation possible in continuous mode, which promises a large potential for industrial use. Magnetic particles are separated to a wire filter, from which they are cleaned by centrifugal forces to the chamber wall. The simulation of magnetic particles collected by a wire were possible by the discrete element method. The simulation shows the detachment of particles from the wires by the centrifugal force. Two prototype machines were set up to investigate the process. The discharge of particles from the wire filter depends on the magnetic field strength and the centrifugal velocity. It was possible to set up a machine reaching a separation efficiency of 99 % at a volume flow of 1 m 3 /h (excluding dead times) in a batch-wise mode. A second machine built as magnetically enhanced decanter separates particles and transports them out of the bowl by a screw conveyor in a completely continuous mode. Instead of the common electromagnets a permanent magnet assembly can be combined with a magnetically enhanced centrifuge to save costs.

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Fluorescence Imaging Methodology for Oil‐in‐Water Concentration Measurements

et al. 2021

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A Pitot‐tube jet pump for separating and transporting liquids of different densities is in use for processing oil‐polluted water. The remaining oil‐in‐water (OiW) concentration is a main indicator for the process efficiency and requires a precise measuring method. Hence, a simple approach delivering reliable oil concentrations has been developed in this project. The measurement principle relies on the image acquisition of an OiW emulsion, where the oil phase is seeded with a selective dye tracer. In this concept study, a detailed description of the preparation procedure is provided. Suitable operation parameters leading to sufficiently stable emulsions have been obtained. Finally, a calibration function was determined. It can be used to correlate uniquely the image intensity to the oil concentration.

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A hybrid method for combining High-Gradient Magnetic Separation and centrifugation for a continuous process

Cited by 16 publications

References 26 publications

Preventing of flooding phenomena on vacuum distillation trays column via controlling coking value factor

Preventing of flooding phenomena on vacuum distillation trays column via controlling coking value factor

Magnetically Enhanced Centrifugation for Industrial Use

Fluorescence Imaging Methodology for Oil‐in‐Water Concentration Measurements

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