Thermal membrane coupling energy supply system used for ships

Abstract

The invention discloses a thermal membrane coupling energy supply system used for ships, and relates to the fields of seawater desalination, energy conservation and emission reduction. A reverse osmosis seawater desalination supply assembly of the system includes a seawater pretreatment device, a heat recovery device and a reverse osmosis device; a falling film evaporation seawater desalination assembly includes a water turbine, a compressor, a thermal method desalination device, and the reverse osmosis device also used for the reverse osmosis seawater desalination supply assembly; the input end of the water turbine communicates with the brine output end of the reverse osmosis device through a pipeline, the output end of the water turbine communicates with the brine input end of the thermal method desalination device through a pipeline, and the water turbine is connected with the compressor; and the compressor and the thermal method desalination device form a steam circulation path. The system provided by the invention can perform coupling on reverse osmosis membrane method water production function and thermal method water production function, and can further realize evaporation water production by utilizing coupling of saltwater residual pressure energy generated in the process of producing water by the reverse osmosis membrane method and a thermal method, thereby significantly reducing energy consumption and costs; and the system is extremely suitable for promotion.

Description

technical field [0001] The invention relates to the fields of seawater desalination and energy saving and emission reduction, in particular to a thermal film coupled marine energy supply system. Background technique [0002] Like energy, water is one of the basic needs of human production and life. Each person must ensure at least 25 liters of domestic water per day (5 liters of drinking water + 20 liters of washing water), and in hot areas, the demand is even greater , the minimum domestic water consumption is 10 liters / day. As an independent individual, the ship sails far away from the land. The crew and equipment need to consume a lot of fresh water. For a sea ship with 100 people, at least 3 tons of domestic water is needed every day, and the water used for equipment (the water required for the work of ship equipment, such as boiler replenishment water) etc.) and more; for large steam-powered ships, the supplementary boiler water is about 1% of the steam consumption of ...

AI Technical Summary

Problems solved by technology

However, in order to save installation space, it is difficult for thermal seawater desalination devices on ships to be equipped with multi-stage and multi-effect desalination systems like on land. Generally, only one-stage desalination system is installed, but the thermal efficiency of the first-stage desalination system is low when heating seawater , so the heat source cost of the thermal seawater desalination device on the ship has become the main cost of water production, even as high as nearly 100 yuan / ton

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