Pressure and Flow Rate Optimization in Reverse Osmosis

Automatic flow control for membrane water purification systems to optimize water production and membrane life while reducing waste. The method involves using a controller to dynamically adjust the diaphragm valve opening based on parameters like membrane performance, pump pressure, and water quality. This ensures the right balance of purified water flow and wastewater flow without manual intervention. The controller calculates an optimal ratio of wastewater to purified water to prevent excessive waste or membrane fouling. It also monitors factors like membrane temperature and pressure to detect fouling conditions and flush the membrane.

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Online flushing system for reverse osmosis water treatment to clean membranes without stopping production. The system uses real-time monitoring of membrane performance and intelligent valve control to optimize water pressure for each membrane. It also allows isolating and flushing degraded membranes without shutdowns. The system has a flushing mechanism with a pump and filter, and valves to connect membranes in series/parallel. A control device evaluates membrane performance based on pressure drop, flow rate, and water quality. It selects valve configurations to optimize each membrane's water production efficiency.

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A dynamic control system for reverse osmosis membrane fouling based on real-time monitoring of operating conditions. The system uses sensors on the inlet and outlet pipes of each membrane group to monitor parameters like pressure, conductivity, and flow rate. These signals are fed back to a control system to determine the best cleaning time for each membrane based on flux and transmembrane pressure differences. This allows targeted cleaning of fouled membranes instead of full system shutdowns.

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Automated recovery rate adjustment for reverse osmosis membrane systems that improves stability and efficiency compared to manual adjustment. The method involves using sensors to monitor input water quality parameters like conductivity, silica, and hardness. Based on these readings, a control unit adjusts the recovery rate of the membrane unit. This dynamic adjustment keeps the recovery rate optimized for the current water quality, preventing fouling and bursts. It uses valves to regulate the flow of concentrated water back to the feed stream. The adjustment is done in real-time as the water quality changes, versus manual adjustment which is infrequent and delayed. The automated adjustment also reduces the risk of human error in setting the recovery rate.

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Control system for water purifiers that regularly cleans the high concentration water on both sides of the reverse osmosis membrane to improve efficiency. The system has a control module connected to the water purifier. When the pure water outlet stops, it opens valves to communicate the clean water, reverse osmosis filter, and waste water flow paths. If the pure water outlet is closed for a time, it opens valves to communicate clean water, reverse osmosis filter, waste water, and stale water flow paths. When pure water is flowing, it closes the stale water valve. This regularly drains and rinses the high concentration water environments on both sides of the membrane.

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Automatic feedback control system for reverse osmosis water filtration that maintains desired flow rates and water quality. The system uses iterative feedback loops to adjust feed water and concentrate water flow rates based on measured permeate flow rate and solute concentration. This continuously optimizes filtration efficiency and purity by compensating for factors like membrane type, feed water quality, and temperature.

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Reducing concentration polarization on reverse osmosis membranes to improve desalination efficiency by using fluid energy. The method involves optimizing the motion of a diversion net in the membrane module to reduce fouling and scaling. By adjusting factors like driving pressure and diversion net size, the net vibrates periodically due to vortex shedding when affected only by the flow field. This reduces concentration polarization on the membrane surface.

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Water purification equipment with adaptive reverse osmosis membrane flow control to optimize performance for varying water qualities. The equipment has a controller that calculates the optimal total concentrated water flow based on the current flow and historical total. It then adjusts the pure water flow regulator to achieve that target. This allows the membrane recovery rate to dynamically adapt to different water qualities instead of using a fixed setting.

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A reverse osmosis water treatment system that uses automated controls to optimize performance and extend membrane life. The system has modules for dosing chemicals, monitoring water parameters, cleaning alarms, and filter replacement alarms. It uses a central control module to coordinate the functions and make decisions based on real-time parameter data. The system optimizes chemical dosing, prevents fouling, and schedules cleaning and filter replacements to maintain membrane performance.

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Washing and removing scale from reverse osmosis membranes without stopping operation or discharging permeate. The method alternates between two water treatments: (a) removing scale using concentrated water from a separate reverse osmosis device, and (b) treating with normal feed water. By switching between devices, scale buildup on one membrane is cleaned using concentrated water from another device without interrupting operation.

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Water purification equipment that improves water production efficiency by monitoring and adjusting operating parameters based on reverse osmosis membrane flow. The equipment has a controller, flow monitoring module, reverse osmosis membrane filter branch, and optional modules for water quality, temperature, pressure, and concentrated water flow regulation. The controller receives reverse osmosis flow data from the monitoring module and optimizes parameters like pump speed, valve position, and membrane pressure to maximize output based on the reverse osmosis flow rate.

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Stable water quality control for water purification systems that provides consistent output water quality for different input qualities while using less water. The method involves dynamically adjusting the feed pump speed and product water recirculation based on the influent quality. This maintains the target permeate quality and recovery regardless of input water quality. By varying the feed pump speed, it allows adjusting the pressure on the membrane to compensate for lower quality inputs. Recirculating some of the permeate helps balance the recovery.

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A membrane filtration system with dual-stage reverse osmosis (RO) filtration and a control method that maintains consistent treated water flow rate. The system has safety filter, first RO device, second RO device, and pumps. A controller adjusts pump speeds using inverters to meet target flow rates. The method involves: 1) Setting max pump speeds, 2) If 2nd permeate flow exceeds target, reduce 2nd pump speed, 3) If 2nd permeate still exceeds, reduce 1st & 2nd pumps to min, 4) If 2nd permeate falls below target, raise all pumps to max. This balances pump speeds to match flow needs.

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An apparatus and method for cross-flow membrane filtration that allows high-performance filtration of liquids with low transmembrane pressure (TMP) and high cross-flow rates. The apparatus has multiple membrane modules stacked vertically and serially connected on the feed side. This configuration avoids dead legs and static pressure issues. It also allows parallel connections between segments. The method involves pumping feed through the stacked modules. This provides controlled TMP and cross-flow rates for applications like dairy processing.

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Portable or installed reverse osmosis (RO) water purification system with reliable city feed water supply. The system has a split feed setup where the city water is directly split into two paths. One path goes to a storage tank and the other directly feeds the RO system. A controller monitors tank pressure and city feed pressure. If tank pressure drops, it switches to city feed. If city feed drops, it switches to tank. This maintains constant supply. The controller also increases pump rate if city pressure drops.

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Optimizing water production efficiency in reverse osmosis water purification systems by adjusting operating parameters based on real-time monitoring. The method involves continuously measuring the flow rate of purified water after reverse osmosis, comparing it to a preset range, and if below, adjusting parameters like water temperature, pressure, and voltage to improve flow. This allows dynamic optimization of the purification process based on actual conditions rather than fixed settings.

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A membrane filtration system that can achieve high water recovery with constant permeate flow and variable permeate delivery based on demand. It uses a reverse osmosis (RO) or nanofiltration (NF) unit with a concentrate accumulator and two operating modes. In mode 1, concentrate from the RO/NF is pumped back in while feedwater and recycled permeate are sent through. In mode 2, concentrate is drained while still feeding and recycling. This allows constant permeate flow with variable feed rate.

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Optimizing reverse osmosis water desalination systems to reduce operating costs and minimize cleaning frequency using machine learning and predictive modeling. The method involves monitoring parameters like pressure, flow, salinity, temperature, and pressure differences across the membranes. A machine learning model is trained on historical data to predict fouling parameters like A- and B-values based on feed conditions. This model is then used to simulate future operating scenarios and identify the optimal time to clean the membranes to minimize energy usage.

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Flushing a reverse osmosis filter using permeate, the filtered water, instead of untreated feed water. This involves routing permeate through the filter in the same direction as normal filtration, stopping the feed flow, immersing the filter in permeate for 5 minutes to resorb solids, then flushing with permeate to remove the resorbed solids. This improves filter cleaning compared to using feed water for flushing.

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A high-pressure membrane filtration system with recovery rate control and protection to improve efficiency, reliability, and safety of membrane filtration systems. The system uses a PLC controller to dynamically adjust the system recovery rate by regulating valve opening based on deviations from target recovery. It also provides interlocking protection against excessive pressure, flow, flux, and transmembrane pressure. This prevents system issues like pressure spikes, membrane fouling, and flux drops.

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