Industrial Shears Articles

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Timber frame and post and beam construction

Timber framing and "post-and-beam" construction are a unit strategies of building with heavy weight timbers instead of dimensional timber like 2"x4"s. Timber framing is sometimes additionally known as post and beams because as it is evident for its name that it is a way of using frame made of timber wood for construction because it acts as the ...

Mechanism and kinetics of biofilm growth process influenced by shear stress in sewers

by IWA Publishing  (Dec. 21, 2015)

Sewer biofilms play an important role in the biotransformation of substances for methane and sulfide emission in sewer networks. The dynamic flows and the particular shear stress in sewers are the key factors determining the growth of the sewer biofilm. In this work, the development of sewer biofilm with varying shear stress is specifically ...

Probability distribution of turbulence in curvilinear cross section mobile bed channel

by IWA Publishing  (Dec. 16, 2015)

The present study investigates the probability density functions (PDFs) of two-dimensional turbulent velocity fluctuations, Reynolds shear stress (RSS) and conditional RSSs in threshold channel obtained by using Gram–Charlier (GC) series. The GC series expansion has been used up to the moments of order four to include the skewness and ...

Optimisation of micro-processes for shear-assisted solid–liquid separation in a rotatory batch flow vortex reactor

by IWA Publishing  (Aug. 6, 2015)

This paper reports the study of micro-processes in a novel pre-treatment technique using a pellet forming batch flow vortex reactor of cylindrical shape that consists of axially revolving rotor plates between fixed stator plates. The suspension was first mixed with high molecular weight synthetic polymers by stirring for approximately 50 ...

Numerical analysis of hydraulic jumps using OpenFOAM

by IWA Publishing  (Jul. 3, 2015)

The present paper deals with a hydraulic jump study, characterization and numerical modeling. Hydraulic jumps constitute a common phenomenon in the hydraulics of open channels that increases the shear stress on streambeds, so promoting their erosion. A three-dimensional computational fluid dynamics model is proposed to analyze hydraulic jumps in ...

Concrete infilled Channels research at Colorado state university Hydraulics labratory - Case Study

by Presto Geosystems  (May 7, 2015)

Geoweb® Cellular Confinement Systems are used for applications such as load support, earth retention, porous pavement, and slope and channel erosion protection. The product can also be utilized in the efficient formation of concrete structures such as levees, stream bank revetment, or slope protection, allowing for rapid installation without ...

Rotary batch mixer yields high-quality blends for powder metallurgy

by Munson Machinery Co., Inc.  (Dec. 9, 2014)

GKN Sinter Metals Inc. is the world's largest manufacturer of parts made by powder metallurgy, a molding process that produces complex shapes with a range of properties. Powder metallurgy offers benefits in part fabrication over competing metal processes. It is faster than forging or casting and permits the use of more performance-enhancing alloys ...

Optimization of operation conditions for preventing sludge bulking and enhancing the stability of aerobic granular sludge in sequencing batch reactors

by IWA Publishing  (Nov. 18, 2014)

Sludge bulking caused by loss of stability is a major problem in aerobic granular sludge systems. This study investigated the feasibility of preventing sludge bulking and enhancing the stability of aerobic granular sludge in a sequencing batch reactor by optimizing operation conditions. Five operation parameters have been studied with the aim to ...

Custom Computer Hard Drives Disposal Solution - Case Study

by Waste Control Systems Inc  (Jun. 18, 2014)

Problem: A computer recycling company was looking for a machine to physically alter computer hard drives so that they could assure their customers that the data on the hard drive was destroyed. They did not have a budget for a hook shear shredder. Solution: We developed a custom hard drive disposal solution. An air activated punch was developed ...

Effect of shear rate on the activity of enzymes used in hydraulic fracture cleanup of tight unconventional reservoirs

by Inderscience Publishers  (Jun. 2, 2014)

Injection of polymeric solutions in order to propagate a fracture and carry proppants to keep the fracture open is a common practice in hydraulic fracturing of ultra–tight formations. Polymeric fluids open and extend the already existing network of fractures. Considering the low permeability of the formation, small width of the micro–fractures, ...

MASW and resistivity sounding case study

by GeoView, Inc.  (Jan. 18, 2014)

Anclote Natural Gas Conversion Project, Pasco County, FL  Our client was coordinating the conversion of an oil-burning power plant to natural gas. As part of the associated geotechnical study, GeoView, Inc. was tasked with determining the S-wave velocity and vertical resistivity structure at the site. For the seismic portion of the study, ...

Adaptive control of algae detachment in regulated canal networks

by IWA Publishing  (Apr. 9, 2013)

Open-channel distribution networks are subject to algal developments that can induce major disturbances such as clogging of hydraulic devices (pipes, weirs, filters, flow meters). Flushes can be used as a strategy to manage these algae developments. A flush is carried out by increasing the hydraulic shear conditions using hydraulic control ...

Predicting apparent shear stress in prismatic compound open channels using artificial neural networks

by IWA Publishing  (Nov. 27, 2012)

The apparent shear stress acting on the vertical interface between main channel and floodplain (with and without vegetation) in prismatic compound open channels was studied using artificial neural networks (ANNs). Apparent shear stress is commonly used to quantify the transverse momentum exchange between sub-areas of the cross section, and its ...

Eldan Recycling introduces a system for processing of mining tyres

by Eldan Recycling A/S  (Jan. 7, 2012)

The Eldan Recycling mining tyre recycling system can turn the huge waste mining tyres into reusable rubber granulate, powder and clean steel wire… Eldan Recycling delivered and installed its first complete tyre recycling plant back in 1991 and has since then developed and optimised the process to obtain the best possible purity of the ...

Influence of hydraulic retention time on UASB post-treatment with UF membranes

by IWA Publishing  (Dec. 1, 2011)

A pilot UASB reactor coupled with an external ultrafiltration (UF) membrane was operated under three different hydraulic retention times (HRT) for domestic wastewater treatment. The aim was to assess the HRT influence on system performance and fouling. The highest concentrations of COD, total solids, extracellular polymeric substances (EPS) and ...

Effect of floc structure and strength on membrane permeability in the hybrid coagulation-microfiltration process

by IWA Publishing  (Mar. 1, 2011)

The relative importance of floc property on microfiltration and fouling mechanism remains a field of arguments. The effects of floc structure and strength on fouling rate of coagulation-microfiltration were investigated in dead-end microfiltration. Flocs varying in size, fractal structure and strength were prepared by AlCl3 and PACl (Polyaluminum ...

The Challenge

by North American Dismantling Corporation  (Aug. 16, 2010)

The Challenge: Safely Dismantle an Old GM Foundry   Lapeer-based demolition company remediates toxins,  clears down to concrete slab High reach equipment taking down ...

A Customer's Success Story

by North American Dismantling Corporation  (Aug. 16, 2010)

Tear it down. Strip the metal out. Pulverize the concrete. Shred it. Shear it. Dice it up and get it out of here. Bring it all down and start over. The idea of a total demolition job may sound haphazard and uncontrolled – but large-scale dismantling firms like North American Dismantling Corp. have moved far beyond the days of just swinging ...

Self-welding susceptibility of 316LN and alloy D9 stainless steels in high-temperature flowing sodium

by Inderscience Publishers  (Jun. 4, 2010)

The self-welding susceptibility of 316LN Stainless Steel (SS) and alloy D9 (15Cr-15Ni-2Mo titanium-modified) SS in 20% cold-worked conditions was evaluated in flowing sodium at 823 K under a maximum contact stress of 12 MPa and for durations of 3, 6 and 9 months. The specimens used were hollow, cylindrical and stacked one above the other under ...

Argentina’s largest oil co. uses mono for shear sensitive duties

by NOV Mono - Mono Pumps Ltd  (Feb. 25, 2010)

YPF produces in the region of 400,000 barrels of oil per day from the Neuquen Province, of which 123,080 barrels/day are produced from the Lomitas Chiuhido oil field in the Rincon de Los Sauces region. The Mono Industrial E Range pumps have been installed on a first stage upstream process to transfer a mixture of formation water, crude oil and ...

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