WET News

20 WET NEWS JANUARY 2016 LEADERS IN CORROSION PREVENTION & SEALING TECHNOLOGY Winn & Coales (Denso) Ltd Tel: 0208 670 7511 l Web: www.denso.net Let Denso Transform Your Pipebridge! ...Act now before it's too late! If you have a deteriorating steel pipebridge, the Denso Steelcoat 100/400 System can save it, normally long after alternative conventional coating remedies cease to be effective. In compliance with enviromental restrictions against shot blasting, over rivers etc, the system only requires simple hand tool surface preparation and once applied properly will give a minimum of 20 years maintenance free service life. Only Denso can offer this amazingly long service life from simple hand tool surface preparation. Contact us if you want more information or require an obligation free survey of your pipebridge: Malvern, Worcs WR14 1JJ, UK Tel: +44 (0) 1684 891 371 info@pulsar-pm.com www.pulsar-pm.com ● Fixed or portable versions ● Simple pipe strap fixing ● 4-20mA output/ Modbus and relay alarm Contact us today for information Flow Pulse Flow Monitor Designed to reliably monitor flowrates of liquids and slurries in pipes to 1250mm dia and 20mm wall thickness. Non invasive. Clamps onto the outside of the pipe. DSP technology ensures reliability. FREE SITE TRIAL measuring sections varies from 5 to 24 depending on the length of probe required and the reso- lution. Special upper and lower sections, called terminators, ensure that the top and bottom sampling layers of the active range are flat and not curved. In addition, passive body and process fittings position the active part of the sensor in the desired measuring range. This design concept, which provides excellent resolution and accuracy, enables a number of separate parameters to be measured at the same time including height, volume, con- ductivity as well as the relative position of fluids in the vessel. Although the individual sensors operate independently, they also work collectively to build up an accurate 3D picture of the process. The data from all the sections is combined to give smooth continuous readings. Each sensor can measure a thin horizontal layer of material extending out from the probe to the vessel wall. This is not affected by other items in the The Hycontrol sensor is designed to work reliably even in the presence of severe fouling. This is achieved via a special 'guard electrode' within the sensor, which disrupts the de-sensitising effect of the material build-up. As a result, the main foam sensing electrode ignores the fouling and monitors only the active foam within the process. For measuring foam in non- aqueous solutions is based on dielectric measurement tech- nology products include the vessel such as stirrer shaˆs. Each sensor measures the impedance of the fluid under test by passing a small current through the material. Interfaces between layers in the fluid are sensed by the rate of change of impedance. Foam is recognised by contrast with the liquid below. In this way the thickness and position of a layer of foam can be determined. The versatility of the multi-sensor system means the instrument can measure levels of foam and liquid, just foam or just liquid. Hycontrol's systems originated from detailed research into foam control during pharmaceutical fermentation DiFoam range of sensors and controllers. These provide an efficient, reliable and cost- effective solution to foam control in a diverse collection of industries where the production and control of foam causes a problem. They can also be used for level measurement of non- aqueous liquids. The system, which comprises a sensor and a controller, was initially developed for the control of foam in a resin manufacturing process for yacht varnish. The technology has been further developed to become a useful tool in measuring and controlling foam in a variety of other applications including oils, solvents, hydrocarbons and products such as cocoa butter. Hycontrol recognises that most foam reduction systems are reactive rather than pro- active. Although its technology significantly improves foam control there are certain appli- cations where installing sensors is not practical. To overcome this, they have developed their predictive off-line FTA Foam Tendency Analyser based on the tried and tested foam sensor technology. No space Instead of measuring the foam created in the process, the FTA is used to predict in advance when foam will occur, allowing operators to take the appropriate action before any significant foam build up occurs. The FTA continually samples the process liquid and creates foam inside a small test chamber which is then measured. The self-contained unit includes sampling pumps and an anti-foam pump to control the foam. If required the anti-foam pump can be replaced by an intelligent interface to an external process controller. The Foam Tendency Analyser is particularly useful where there is no space for a normal sensor or in inaccessible loca- tions such as underground sewers. Other applications have included foam control in large water features such as fountains, where the introduction of costly foaming agents such as liquid soap can prove very messy and also preventing outflows creat- ing foam in rivers and streams. Consideration must be given to the long-term, detrimental effect that the disposal and dis- persal of foam reduction chemi- cals have on our health and the environment. Companies world- wide spend billions of pounds each year dealing with foam and the effects it has on their businesses. There is clear evi- dence that companies can mini- mise the environmental impact of these chemicals, whilst achieving considerable savings by actively controlling the addi- tion of anti-foamers and de- foamers. The technology is now available to achieve this and there is no need for companies to continue with out-dated con- trol systems, which only serve the interests of the chemical suppliers. The challenge: Keeping foam under control INSIGHT

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