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TECHNOLOGY IN ACTION ADVERTORIAL


Major Greek Power Station Orders 200 Continuously Modulating Damper Actuators


N Thermaset – Get to know us E


stablished in 1984, our success has always been based on the principal that our customers’ problems are our opportunities. Like many companies, we had humble beginnings, but


we have grown and thrived in an increasingly competitive market place by maintaining the exact same focus on customer service we had on day one. For our customers, this has meant security in the knowledge that we provide the right solutions at the right time – no matter what the request. The expertise of our personnel in powder coating spans over 30 years. Manufactured with continuous process innovation in


accordance with ISO 9001:2008 and nationally recognised environmental accreditation ISO 14001, we can help you select the most suitable product for your requirements from 1000‘s of formulations for next day delivery. Our service covers the full spectrum of the industry.


There is no colour we cannot match and no special order requirement we cannot meet. Whether you require just a few kilograms of powder coating powder for a special order, or to tonnes for a long-term contract, Thermaset should be your first choice.


Thermaset  01827 55777  www.thermaset.co.uk


early two hundred AUMA electric actuators have been supplied to Greece’s largest


power station, the 1600MW Agios Dimitrios in West Macedonia in the north of the country. Supplied by AUMA UK via leading specialist


manufacturer Damper Technology Limited (DTL), Sipos SEVEN HiMod variable speed actuators for continuously modulating duty are controlling dampers of various configurations that are being installed as part of the refurbishment of four of the giant plant’s flue gas heat recovery systems. Dampers perform a similar function to


valves, in that they control and direct the flow of gases in ducted systems. DTL is a leading international manufacturer, with factories in the UK and India and a history spanning more than 50 years. For this installation, DTL have supplied a diverse mixture of circular and rectangular butterfly and multilouvre style dampers, all manufactured individually for each application. The customer’s specification included the


requirement to continuously modulate the damper blades to provide fine control of the gas flows. The Sipos SEVEN HiMod meets the EN15714-2 continuous modulation standard with accuracy in positioning of 0.1-0.2% of the total travel so demanding applications requiring high positioning accuracy can be undertaken. In this application, the control signal to determine the blade position is via a 4-20mA signal supplied directly to the Sipos SEVEN HiMod actuator. The Sipos SEVEN actuator family offers a range of features, that includes variable speed operation and both Profibus and HART communications and the soft start operation that comes from the opportunity to vary the breakout and closing speeds of the actuator stroke means that high start-up current can be avoided, with potential savings in energy and in power cabling costs.


AUMA  01275 871141  www.auma.co.uk


80 GHz level radar helps recycle APC residue into concrete blocks Another success in challenging applications


Figure 1 Useful construction blocks produced using recycled APCr, rather than sending to landfill


permitted sites in the UK and are proud to be ISO 14001 and ISO 9002 accredited. One type of waste processed at their Cardiff site is APCr (Air Pollution Control residue), the fine powder that remains following the cleaning of gases from Energy from Waste facilities. It contains lime which is alkaline, and consequently APCr is classified as hazardous waste. For the past 18 months Castle have used recycled APCr as an aggregate replacement in the


C


production of precast concrete products. Following a detailed end of waste review in full consultation with Natural Resources Wales (NRW), APCr is gainfully employed in the manufacture of a range of concrete blocks. The pre-processed APCr is combined with additional aggregates and cement to produce heavy duty interlocking concrete blocks and 4” dense blocks, which are used in construction, civil engineering projects, barriers and bay walls. (See fig 1) Part of this recycling process involves mixing the APCr powder with recycled water in a 4m high


agitated vessel to form a slurry which is then dewatered prior to combining with other aggregates to form the blocks. During this mixing process, the level in the vessel requires careful monitoring and control to ensure the process is carried out under the correct conditions. Inside the vessel there is a very agitated surface, solids can build up on the walls as well as the agitator itself and surface foam can also be produced under certain conditions. (See fig 2)


Figure 2 Challenging conditions - the mixing process produces a very turbulent surface, splashing, surface foam, build up on the walls and vessel internals The uneven surface, foam and solids build up - are accommodated by the VEGAPULS 64’s 80 GHz


radar technology to deliver accurate and reliable level readings. It employs focusing to avoid unwanted interfering signals combined with high sensitivity to read through condensation, sensor build up and to overcome the foaming surface. As well as handling difficult conditions such as these, they are also capable of measuring very low reflectivity hydrocarbons, even liquid gases, highly pure solvents, past complicated vessel internals, down long nozzles and even operating through process isolation valves.


VEGA Controls Ltd  01444 870055  www.vega.com/uk


CONNECTINGINDUSTRY.COM/PROCESS&CONTROL PROCESS & CONTROL | JULY/AUGUST 2017 49


astle Environmental is a leading supplier of specialist waste treatment, recycling and disposal services, handling in excess of 250,000 tonnes of waste each year. They operate three fully


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