Small seawater desalting equipment with energy recovery device applicable to new-energy independent power grid

Abstract

Small seawater desalting equipment with an energy recovery device applicable to a new-energy independent power grid comprises a raw water pump and a multi-level filter device. The multi-level filter device is connected with the raw water pump by a water inlet, a water outlet of the multi-level filter device is connected with a water inlet of a reverse osmosis membrane by a high-pressure pump, a branch of a fresh water outlet of the reverse osmosis membrane is connected with a cleaning water tank by a pipeline and a water replenishing valve, another branch of the fresh water outlet of the reverse osmosis membrane is connected with fresh water storage equipment by a pipeline and a water producing valve, a branch of a high-pressure strong brine outlet of the reverse osmosis membrane is connected with the cleaning water tank by a pipeline and a cleaning water return valve, another branch of the high-pressure strong brine outlet of the reverse osmosis membrane is connected with the energy recovery device, the energy recovery device and the high-pressure pump share the same coaxial motor, and the motor is connected with a frequency converter. The energy recovery device connected with the high-pressure pump by the motor is arranged at the high-pressure strong brine outlet of the reverse osmosis membrane, high-pressure hydraulic power of high-pressure strong brine is converted into mechanical energy by the device to be used by the motor, energy is recovered, and water producing energy consumption is effectively reduced.

Description

technical field [0001] The present invention relates to seawater desalination technology for new energy independent power grids, in particular to a small-scale seawater desalination device with an energy recovery device suitable for use in sea island areas where new energy sources such as wind energy and solar energy are abundant, but freshwater resources and domestic electricity are relatively short . Background technique [0002] Reverse osmosis seawater desalination technology is currently the most important form of seawater desalination technology, and an important goal of its development is to reduce operating costs. Energy consumption accounts for the largest proportion in the composition of operating costs, and reducing energy consumption is the most effective means to reduce the cost of seawater desalination. [0003] Reverse osmosis seawater desalination energy recovery devices mainly fall into two categories: hydraulic turbine type and work exchange type. The hyd...

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Problems solved by technology

[0007] For installation less than 100m 3 The application of / d seawater desalination equipment in islands has not yet had any application cases for energy recovery devices, especially in the application of new energy independent grid seawater desalination equipment

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