Hoppers & Silos
Densberger added that some pneumatic cleaning systems require very high air volumes, often as much as 1,200 CFM. “To achieve that kind of pressure, the diesel compressor rental alone can be more than $1,000 a day, and the fuel bill for a full day’s work could be half again as much,” he said. “Then there’s the cost to actually do the work.”
Potential damage to the storage vessel can also be an issue. Some cleaning technologies use the very high pressure to blow air through a hose that’s simply dropped into an access hole at the top of the vessel. At the end of the hose is a tool with a restricted nozzle, which causes the “cleaning head” to thrash about randomly. While this technique works in large blockages, it provides little or no control, and as the head gets closer to the vessel wall, it has an equal chance of taking out a chunk of the silo as it does hitting material for removal. For extreme blockages where hardened lumps of material have plugged discharge chutes, silo cleaning technicians also use the Martin Buster, which safely dislodges blockages by the powerful force of
expanding CO2 gas. The technique employs non-explosive generators that cause rapid gas expansion to fracture chunks and compacted material, opening the discharge and restoring normal flow.
When bridged or arched material creates a no-flow condition, technicians can rely on the Martin Drill to bore through tough clogs. The drill’s powerful hydraulic action drives its way through blockages, clearing a pathway at depths up to 45 metres (150 feet). Martin Engineering’s Silo Solutions are provided as a turnkey service. The company’s fully-equipped teams bring all required equipment and personnel directly to customer sites. Many facilities are able to remain in operation during vessel cleaning, but when conditions require a shutdown, technicians work evenings, weekends or holidays to accommodate customer schedules. Silo cleaning services from Martin Engineering are backed by the company’s total satisfaction guarantee. If any customer is dissatisfied after one full shift, the crew will return to headquarters without charge. Founded in 1944, Martin Engineering is
Martin Silo Solutions will remove build-ups to restore design capacity and flow rates without the need for confined space entry or hazardous cleaning techniques.
the world leader in making bulk materials handling cleaner, safer and more productive. The company supplies flow aids and conveyor products around the world for a wide variety of bulk material applications, including coal, cement / clinker, rock / aggregate, biomass, grain, pharmaceuticals, food and other materials. The firm is headquartered in Neponset, IL, offering manufacturing, sales and service from factory-owned business units in Brazil, China, France, Germany, Indonesia, Mexico, South Africa, Turkey, India and the UK, and under exclusive license with ESS Australia. n For more information visit:
www.martin-eng.com
Ingeniously simple level measurement for bulk solids
Over 30 years of continual research and development at UWT ensures that each level control system is precision engineered, quality assured and fully tested.
We will support you to identify the most prudent and cost effective level control for your application. We understand the need for careful product investment whilst maintaining optimum plant efficiency.
The performance and design reliability of UWT (UK) Ltd level controls means that you can simply install and forget.
Product Ranges: n Rotonivo (paddle switches)
n Nivobob (electromechanical) n Vibranivo (vibrating fork sensors) n Nivotec (level visualisation)
UWT (UK) Ltd 20 Main Road Dorrington
Approvals: ATEX, FM & CSA, GOST R/RTN, IEC-Ex, EHEDG
“Impressive technology. Clever people. First rate support.” Smeri Srl, Italy
Shropshire SY5 7JW Tel: 0845 4810463 Fax: 01743 718883
Email:
sales@uwtuk.com www.uwtuk.com
20 March 2014 Solids and Bulk Handling
www.solidsandbulk.co.uk
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