Deep sea suspended seawater desalination system without breather pipe

Abstract

The invention relates to a deep sea suspended seawater desalination system without a breather pipe. The deep sea suspended seawater desalination system comprises a suspended seawater desalination module, an offshore platform, an upper cable and a hose cable assembly. An air tank, a reverse osmosis-type seawater desalination assembly and a water storage tank are arranged in the seawater desalination module from top to bottom. The seawater desalination assembly is communicated with the water storage tank through a first pipe. The water storage tank is communicated with an air tank through a second pipe. The front end of the seawater desalination assembly is provided with an electric axial flow pump for feeding seawater. A water outlet of the water storage tank is connected to the offshore platform through an electric fresh water lightering pump and a hose in the hose cable assembly. The offshore platform is connected to the suspended seawater desalination module through the upper cable. The system only needs an inner fresh water collection pipe so that the system is simplified and reliability is increased. The air tank is arranged at the upper part of the module so that the module buoyant center is located at the upper part and the center of gravity is located at the lower part and thus the correct posture is kept in sea and overturn is prevented. Through use of the electric axial flow pump, a system for pumping seawater from the offshore platform so that energy is saved and the structure is simplified.

Description

technical field [0001] The invention relates to a seawater desalination system, in particular. The utility model relates to a deep-sea suspended seawater desalination system without a vent pipe, which belongs to the technical field of ships and ocean engineering. Background technique [0002] Reverse osmosis membrane seawater desalination is a commonly used seawater desalination method, which has been widely used on land and ships. The reverse osmosis membrane requires a pressure difference of 5MPa or higher on the membrane to allow water molecules to pass through the reverse osmosis membrane to produce fresh water. Therefore, on land or ships, a water supply pump with a pressure exceeding 5MPa must be installed to provide seawater for the reverse osmosis membrane, and only about 30% of the seawater flowing through the reverse osmosis membrane becomes fresh water, and the rest becomes concentrated brine to flow away, making the high pressure The water supply pump consumes ...

AI Technical Summary

Problems solved by technology

The pipe is connected to the deep-sea desalination device and the platform on the water surface, and mutual movement may easily cause the vent pipe to bend and deform, which makes the pipe technically demanding, difficult, and complex, and there is a safety hazard that the entire system will fail after leakage or blockage;

[0006]2. There are many devices on the deep sea desalination device, the center of gravity and buoyancy are difficult to determine, and the loading is difficult

When the water storage tank is empty, the center of buoyancy is lower, which is easy to cause tilting and system failure;

[0007]3. In deep sea waters, there are no waves, and there may be no ocean currents, so it is impossible to use wave energy to provide energy for the device or promote water flow. When the internal flow is not smooth, the efficiency of desalination will be reduced

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