Experimental Research On Pressure Exchanger For SWRO System

With the development of the modern economy and the serious energy problem, energy-recovery gets more and more attention all over the world. In the global area, the hydro-energy recycle technology has been applied to achieve the optimization of energy and higher efficiency schemes in the process industry, and the research on the fluid pressure recover technology and relative equipments becomes a hotspot in the seawater reverse osmosis(SWRO) industry and relevant fields during the recent years.The rotary pressure exchanger based on the positive displacement principle was studied after the analysis and comparison of various hydro-energy recycle technologies and equipments in the paper. The research on the rotary pressure exchanger was applied within the SWRO system, and its relevant design and experimental research was carried out major in experimentation and also theoretical computation.The new extra-fluid driven rotary pressure exchanger was designed and set up, considered the advantage and disadvantage of the former experimental result on the first fluid self-driven equipment and the second electromotor driven equipment The experiment flow of the rotary pressure exchanger was designed and set up, with the SWRO system as its research platform.According to the experiment flow, analysis and research on the various factors affecting the end-cover leakage and pressure-holding instances, were progressed, and the correlation between the main factor, end-face clearance, and the leakage & pressure was emphasized.The stable rotation of the rotor was actualized. The fluid mixing instance in the rotor channels of the pressure exchanger was studied in the SWRO system, the energy recovery efficiency was evaluated. At the same time, the possible parameters which could affect the recovery efficiency were analyzed.The experimental results show that the end-face clearance is the key factor which affects the recovery efficiency. In the existing technique situation, the minimum clearance achieved in the experiment is 0.05mm, the highest pressure is 1.20MPa, the highest energy recover efficiency is 68.8%.The rotary pressure exchanger designed and built in this research is still in the testing phases. The results of this experiment research in this paper could be used in the future design and consummation, and provide valuable data and experiences for the future research on the hydro-energy recycle technology and equipment.