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Products and Services for Fisheries - The Environment - Aquaculture - Waste Water Treatment VSA Oxygen GeneratorsVSA Oxygen Generators - Specification The new Air Products VSA generators take the benefits of using oxygen in aquaculture a step further. The generators have been designed to be low maintenance and reliable systems, just what fish farmers need. The Air Products new patented VSA (vacuum swing adsorption) generators offer benefits to the fish farmer, including: Simple installation Simple operation Easy maintenance High degree of mobility Constructed from standard components Only three moving parts - motor, valve and blower Three phase or single phase power Auto restart in the event of power failure Uses less power than PSA generators No air compressor or air dryer is required, so operating and maintenance costs are reduced. Oxygen technology has now become economical for most aquaculture operations, including ponds, raceways, re-circulation systems, flow through, hatchery operations, sea cages and net pens, and leisure fisheries. The generators in Air Products product range are compact (see specifications), come skid mounted as standard, and can be easily trailer mounted for ease of manoeuvrability around site. The generators simply need to plug into a power supply and you can start producing oxygen right away! Further on we explain the fundamental science behind oxygen generation technology, and in our How they work section, explain in more detail the new Air Products patented VSA (vacuum swing adsorption) process. Look at our case studies about how our customers have used Air Products oxygen generators. Air Products VSA generators allow you to have your own independent oxygen supply, ideal for remote locations. Not only do they remove the management costs associated with traditional oxygen supplies, but also provide a predictable and economic long-term oxygen cost. The new range of Air Products VSA generators will also help keep costs under control and productivity high. VSA Oxygen Generators and aquaculture Air Products range of VSA oxygen generators have been designed specifically to meet the needs of the aquaculture industry and deliver affordable, reliable oxygen. Air Products VSA generators are supplied in a single module (feed/vacuum blower, automatic valves, and a PLC control system). In the larger generators, a single adsorber vessel is free standing, as is the oxygen buffer tank. In the smaller units all of this is integrated within the module. Various options are available to suit all power requirements. The generator can be skid- or trailer- mounted. For those applications where higher pressure oxygen is required, an oxygen booster compressor is supplied on a stand-alone skid. Each generator is packaged to simplify the generator's installation, such that it is literally plug and play. VSA and PSA Generators Most generators are of the Pressure Swing Adsorption (PSA) type. PSA generators produce oxygen from the sieve bed under pressures as high as 8 barg (116 psig), and the zeolite sieve is regenerated against ambient pressure. Such high pressures require the air to be compressed and dried. Both of these processes have substantial power requirements, giving rise to high running costs. Zeolite Contamination Furthermore, the PSA process creates water condensation from the incoming compressed air and this can contaminate the zeolite sieve. If the compressed air supply to the PSA is from an oil injected screw compressor, (which usually are the most economic method of compressed air supply) then there is the added risk of oil contamination of the zeolite sieve. Another disadvantage of oil-injected compressors is that the condensate removed from the filtration system is contaminated with compressor oil and can present a hazardous waste disposal problem in some locations. Complicated Valves PSA generators have many pressure activated pneumatic valves and switches, meaning more to service and go wrong The Vacuum Swing Adsorption (VSA) process produces oxygen at lower pressure of about 1.5 barg (this can be increased to ~3.5 barg by using a booster compressor) and totally regenerates the sieve in a mild vacuum (0.5 barg). In a VSA generator the compressor can be replaced by a blower, meaning that capital and operating costs are reduced. The overall costs of buying and operating a VSA generator are lower than PSA systems. Clean Zeolite While more affordable, VSA generation also reduces the probability of contamination of the zeolite bed, since it is a dry process; no water droplets are formed and any moisture present in the incoming air stays in the vapour phase. Simple Design Air Products ' newly patented VSA oxygen generators use a single electrically actuated four-way valve which is more reliable than pneumatic valves. So there is less to service and go wrong. VSA Oxygen Generators - How they work VSA Oxygen Generators - The Range Two sizes of VSA oxygen generators are currently available, 150 lpm and 500 lpm units:
* An optional oxygen pressure booster can be added to give 3.5 barg / 50 psi pressure, thus making the generator suitable for use with a variety of oxygen-water contactors Having used state-of-the-art technology to generate oxygen, it would be counter-productive not to use the most efficient equipment for dissolution. We can offer a range of equipment to dissolve the oxygen efficiently into the water according to circumstances, including: OxyPlus,OxyWheel (can use low pressure oxygen straight from the generator, so saving energy) |
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| Spirex Aquatec Ltd Bradley Green
, Redditch
, Worcestershire, B96 6TN, United Kingdom - Show Map - Tel: +44 (0) 1527 821 601 Email: info@spirexaquatec.com Member of the Institute of Fisheries Management. Company Registration Number 4524471. Registered in England and Wales. VAT Number GB803548439. |
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