Pilot-Scale Study of Multi-Phase Venting from a Vessel at Elevated Pressure and Temperature

2000 ◽  
Vol 78 (6) ◽  
pp. 434-444 ◽  
Author(s):  
J.R. Chen ◽  
C. Lee ◽  
C. Cheng ◽  
W.K. Chou ◽  
T.C. Ho
Keyword(s):  
Elevated Pressure ◽  
Pilot Scale ◽  
Multi Phase

Control of Ash-Related Operational Problems in BFB Combustion of Biofuels and Waste

2003 ◽  
Author(s):  
Sonja H. Enestam ◽  
Marko K. Fabritius ◽  
Seppo K. Hulkkonen ◽  
Jukka T. Ro¨ppa¨nen
Keyword(s):  
Chemical Equilibrium ◽  
Alkali Metals ◽  
Bottom Ash ◽  
Melting Behavior ◽  
Pilot Scale ◽  
Olive Waste ◽  
Boiler Design ◽  
Fuel Mixtures ◽  
High Alkali ◽  
Multi Phase

When moving towards CO2 neutral bio fuels and waste derived fuels, new challenges are set for combustion facilities and technical boiler solutions. A common feature for both bio- and waste fuels is a big variety in composition, often high levels of alkali metals, chlorine and moisture which make these fuels difficult to burn in facilities designed for conventional fuels such as coal, peat and wood. The problems that might occur due to high alkali and chlorine levels in the fuels, are slagging, fouling, corrosion and bed sintering. The Fortum BioMAC BFB boilers are designed especially for difficult, unconventional fuels such as rice husk, olive waste, straw, construction residue, de-inking sludge, etc. The design of each individual boiler is made based on advanced theoretical prediction tools and extensive fuel testing in laboratory and in pilot scale combustion facilities. The theoretical tools consist of a multi-phase multi-component chemical equilibrium model that estimates the slagging/fouling, sintering and corrosion propensity of the fuels/fuel mixtures and of a computational fluid dynamics part. CFD calculations are used to optimize the flow pattern and the temperature of the boiler in order to avoid hot temperatures in the vicinity of refractory linings and cooled surfaces. The chemical equilibrium calculations predict the melting behavior of the fuel ash, which is used as an indicator for the placement of the superheaters. The bottom ash removal is controlled for efficient removal of coarse material, screening and recirculation. The ash related problems of important bio and waste fuels, the analytical procedure of the evaluation of the usability of the fuels and the adaptation of the boiler design are discussed in the paper.

A Pilot-Scale Evaluation of Natural Gas-Based Foam at Elevated Pressure and Temperature Conditions

2020 ◽  
Author(s):  
Griffin Beck ◽  
Swanand Bhagwat ◽  
Carolyn Day ◽  
Emilio Gordon ◽  
Chris Daeffler ◽  
...  
Keyword(s):  
Natural Gas ◽  
Elevated Pressure ◽  
Pilot Scale ◽  
Scale Evaluation ◽  
Temperature Conditions

Technology Focus: Hydraulic Fracturing Operations (June 2021)

2021 ◽  
Vol 73 (06) ◽  
pp. 55-55
Author(s):  
Chris Carpenter
Keyword(s):  
Hydraulic Fracturing ◽  
Elevated Pressure ◽  
Pilot Scale ◽  
Carbonate Reservoir ◽  
Great Promise ◽  
Area Of Interest ◽  
Fracturing Fluids ◽  
Wellbore Pressure ◽  
Tight Carbonate ◽  
Online Library

This issue marks the debut of the Hydraulic Fracturing Operations feature in JPT. While hydraulic fracturing has long been a feature topic, this year, we are branching this major area of interest into both this feature and a Hydraulic Fracturing Modeling feature, which will appear in the November issue of the magazine. For this issue, reviewer Nabila Lazreq of ADNOC has selected three papers that reflect industry efforts to achieve new goals in production and sustainability. Paper 201450 investigates the potential of natural gas (NG) foam fracturing fluid to reduce the major water requirements seen in stimulation. The authors write that such requirements can be reduced up to 80% in some cases by the use of NG foams. Although modeling is used to reach their conclusions, the authors point out that NG foam fracturing fluids have great promise in operational scenarios in areas such as the Duvernay Shale. Paper 203226 reviews the challenges and conclusions reached by an operator implementing multistage fracturing for the first time in a horizontal well in a UAE tight carbonate reservoir. A cross-disciplinary approach proved effective when conventional stimulation methods were not successful in this challenging formation. Finally, paper 201611 returns to the topic of NG foams, investigating their utility as an alternative to fracturing fluids composed of nitrogen and carbon-dioxide foams. The pilot-scale study leads the authors to conclude that NG foams are effective fracturing fluids that exhibit stable viscosity at elevated pressure and temperature conditions. We hope that you enjoy the inaugural Hydraulic Fracturing Operations feature. Feel free to access the complete papers, and others that reflect recent achievements of SPE conference authors, in the OnePetro online library. Recommended additional reading at OnePetro: www.onepetro.org. SPE 204190 Optimization of Coal-Seam Connectivity by Multiseam Pinpoint Fracturing Operations in the Walloons Coal Measures, Surat Basin by Vibhas J. Pandey, ConocoPhillips, et al. SPE 204140 An Eagle Ford Case Study: Monitoring Fracturing Propagation Through Sealed Wellbore Pressure Monitoring by Kourtney Brinkley, Devon Energy, et al. SPE 202760 Tight Oil From Shale Rock in UAE: A Success Story of Unconventional Fracturing by Nabila Lazreq, ADNOC, et al.

Study on Opposite Folded Plate Anaerobic Reactor in Treatment of Low Concentration Sewage

2011 ◽  
Vol 255-260 ◽  
pp. 2645-2648
Author(s):  
Tie Hong Song ◽  
Tao Long ◽  
Ping Wang
Keyword(s):  
Mass Transfer ◽  
Pilot Scale ◽  
Structure Characteristic ◽  
Removal Rates ◽  
Two Phase ◽  
Anaerobic Reactor ◽  
Treatment Processes ◽  
Double Phase ◽  
Multi Phase ◽  
Anaerobic System

With the demands of quantity and quality for water are increasing rapidly and a lot of wastewater treatment processes are difficult to be used abroad. Therefore, how to enhance the efficiency and to reduce consumption is the key to solve these problems. For purpose of enhancing mass transfer in the system, the reactor was modified with the structure characteristic of opposite folded plate. and the system with the characteristic of multi-phase anaerobe of compartments longitudinally down reactor and two-double phase of sludge- biomembrane in every compartment. The results was when the HRT≥6h and the sludge retention time (SRT) was controlled 120 days, the pilot-scale opposite folded plate hybrid anaerobic reactor (OFPHAR) was Two-phase Anaerobic system. The trial results indicated that the optimal HRT was 6h at (25±2) °C, and the corresponding removal rates of COD, TP and TN removal rates were 78.58%, 35.15%, 39.17% respectively.

Some Applications of the U. S. Steel MVEM

1973 ◽  
Vol 31 ◽  
pp. 4-5
Author(s):  
J. S. Lally ◽  
L. E. Thomas ◽  
R. M. Fisher
Keyword(s):  
Electron Diffraction ◽  
Debye Temperature ◽  
Metals And Alloys ◽  
Critical Voltage ◽  
Dynamical Diffraction ◽  
Phase Structures ◽  
Structure Factors ◽  
Local Bonding ◽  
Diffraction Phenomenon ◽  
Multi Phase

A variety of materials containing many different microstructures have been examined with the USS MVEM. Three topics have been selected to illustrate some of the more recent studies of diffraction phenomena and defect, grain and multi-phase structures of metals and minerals.(1) Critical Voltage Effects in Metals and Alloys - This many-beam dynamical diffraction phenomenon, in which some Bragg resonances vanish at certain accelerating voltages, Vc, depends sensitively on the spacing of diffracting planes, Debye temperature θD and structure factors. Vc values can be measured to ± 0.5% in the HVEM ana used to obtain improved extinction distances and θD values appropriate to electron diffraction, as well as to probe local bonding effects and composition variations in alloys.

Digital imaging and quantitative image analysis of polymer blends

1996 ◽  
Vol 54 ◽  
pp. 170-171
Author(s):  
Xiao Zhang
Keyword(s):  
Digital Imaging ◽  
Imaging Techniques ◽  
Imaging Systems ◽  
Polymer Science ◽  
Key Factors ◽  
Multiple Imaging ◽  
Quantitative Image ◽  
Digital Imaging Systems ◽  
Multi Phase ◽  
Network Technologies

Polymer microscopy involves multiple imaging techniques. Speed, simplicity, and productivity are key factors in running an industrial polymer microscopy lab. In polymer science, the morphology of a multi-phase blend is often the link between process and properties. The extent to which the researcher can quantify the morphology determines the strength of the link. To aid the polymer microscopist in these tasks, digital imaging systems are becoming more prevalent. Advances in computers, digital imaging hardware and software, and network technologies have made it possible to implement digital imaging systems in industrial microscopy labs.

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