Experimental Study Of Wind Compressed Air To Brackish Water Desalination

With the rapid development of the world economy, more and more serious pollution of water resources, freshwater resources are increasingly scarce, coupled with the burning of conventional energy to the atmosphere causedserious pollution problems become major problems restricting economicdevelopment and people’s normal life. So development of new energy is a new trend in energy use, seawater or brackish water desalination as an important way to solve the scarcity of fresh water resources in the future. Sea water or brackish water desalination and new energy, energy saving, emission reduction rational use of energy an effective way to solve the problem of water resources and has broad prospects.China has abundant renewable energy sources including solar, wind, biomass, wave energy, according to the National Academy of Meteorological Sciences estimated, China’s land10m above the ground level wind theory can be developed for the3.2billion kW actually can be developed for253millionkW offshore wind energy can be developed land-based wind energy reserves. China has a rich underground salty water, mainly northwest region is rich in wind energy and coastal areas, is conducive to the effective application of energy to reduce the losses caused due to energy transfer.Wind energy is directly used for brackish water desalination mainly refers the way of wind energy wind turbine compressed air, compressed air-driven pneumatic booster pump driven reverse osmosis membrane desalination of seawater to brackish water.Install the accumulator, and a plurality of pneumatic booster parallel due to the piston phase generated pressure and flow pulsation, in order to eliminate the pneumatic booster. In the experiment, we research pneumatic booster performance for different driving pressure, single, two, three pneumatic booster pump to run the outlet pressure and flow with increasing driving pressure is increased. In the existing experimental conditions, a single gas drive smaller booster pump pressure and flow, two gas drive the booster pump output pressure and flow was significantly greater than a single gas drive booster output flow pressure, and the threethe station gas drive booster pumps operating in parallel output pressure and flow rate is slightly higher than the two gas drive output flow and pressure booster pumps operating in parallel, so the use of two gas drive booster pumps connected in parallel and the accumulatorpump outlet pressure and flow performance.In the experiment using low pressure pneumatic booster group and high pressure pneumatic booster set two sets of pump brackish water booster test found that when low-pressure pneumatic booster group drive pressure is constant, with the high pressure pneumatic booster group drivepressure, high pressure pneumatic booster set outlet pressure and flow increases, while the low-pressure pneumatic booster set outlet pressure gradually reduce the flow rate is gradually increasing regularity. Found by experiment, when the two groups pneumatic booster pumps running at the same time the low-pressure pneumatic booster group drive pressure of0.2MPa, high pressure pneumatic booster group driving pressure of0.3MPa pressure ratio is the most appropriate.A combination of theoretical analysis and experimental test results calculated pneumatic booster pump test purchase in the driving pressure0.3MPa-0.35MPa within the highest energy conversion efficiency can reach40%. Test conductivity1925μs/cm brackish water reverse osmosis membrane desalination rate can be as high as97.35%,3.5L/min water production of the system as a whole, compared with the use of electric centrifugal booster pump reverse osmosis membranedesalination rate and water production is the same. Ultimately through theoretical analysis and experimental data obtained by combining the compressed air in the accumulator is not installed wind brackish water desalination energy consumption of15.1kW· h/m3, with the same accumulator is not installed wind power brackish water desalinationthe energy consumption26.19KW· h/m3lower than; single system investment Chen is also lower than the investment costs of the brackish water of the wind power system, wind compressed air brackish water desalination system than wind power brackish water desalinationthe system has certain advantages, favorable for large-scale investment run.