Energy recovery system and method

By using a parallel structure of rotary and reciprocating switching energy recovery devices and a hydraulic control unit, the problems of poor adaptability to flow fluctuations and complex equipment maintenance in seawater desalination energy recovery technology are solved, achieving efficient and stable energy recovery results.

CN121976932APending Publication Date: 2026-05-05ZHEJIANG FANGWEI TESTING TECH CO LTD
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Patent Information

Application Number
CN202610121483.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-29
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

In existing seawater desalination energy recovery technologies, single rotary devices have poor adaptability, and their energy recovery efficiency drops sharply when the flow rate fluctuates. Mechanical equipment is large in size, complex to maintain, and lacks precise fluid distribution regulation and real-time monitoring, making it difficult to improve the overall energy recovery efficiency.

Method used

The system employs a parallel structure of rotary and reciprocating switching energy recovery devices, combined with a water hydraulic control unit and a testing and monitoring unit. A pressure energy transmission loop is formed through high-pressure and low-pressure pipelines to achieve dynamic fluid distribution regulation and real-time monitoring. Raw seawater pretreatment and concentrated brine buffer modules are set up to stabilize the system environment.

Benefits of technology

Achieving efficient energy recovery under different flow conditions improves the overall energy efficiency and stability of the system, optimizes load distribution accuracy, ensures coordinated operation of devices, extends equipment life, and reduces energy loss.

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Abstract

The invention discloses an energy recovery system and method, and relates to the technical field of seawater desalination energy recovery, the energy recovery system comprises a rotary energy recovery device unit, a reciprocating switching type energy recovery device unit, a water hydraulic control unit and a testing and monitoring unit; the rotary energy recovery device unit and the reciprocating switching type energy recovery device unit are connected in parallel through a high-pressure pipeline and a low-pressure pipeline to form a pressure energy transmission loop, the water hydraulic control unit is arranged at a key node of the loop, and the fluid distribution proportion between the two device units is dynamically adjusted through a cartridge valve group; the testing and monitoring unit collects system pressure, flow and rotating speed parameters and controls the water hydraulic control unit to act through feedback signals, and cooperative operation of the rotary type energy recovery device unit and the reciprocating switching type energy recovery device unit is achieved. The efficient energy recovery device has the effect of efficient energy recovery under different flow working conditions.
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