Low temperature multi-effect distillation seawater desalination system based on diesel engine waste heat recovery

Abstract

The invention provides a low-temperature multi-effect distillation seawater desalination system based on diesel engine waste heat recovery. The low-temperature multi-effect distillation seawater desalination system comprises a diesel engine and a seawater desalination device, wherein a cooling water circulation loop is arranged at one side of the diesel engine and is used for recovering waste heat of the diesel engine; a heat source water circulation loop is arranged at one side of the seawater desalination device; waste heat of the diesel engine is used for performing temperature rise on the heat source water, so that the water can be used for the seawater desalination device. When a diesel power generating unit is used for working and power generation, the waste heat of the diesel power generating unit is recovered; a low-temperature multi-effect distillation technology is used for performing seawater desalination; the heat efficiency and the power generation efficiency of the diesel power generating unit can be improved; the energy consumption of the seawater desalination system desalination system is reduced; further, an integral water-electric coproduction system is built; huge economic and social and economic benefits are generated.

Description

technical field [0001] The invention relates to the technical field of seawater desalination, in particular to a low-temperature multi-effect distillation seawater desalination system based on recovery of waste heat from diesel engines. Background technique [0002] In some islands far away from the mainland, border posts, offshore operating platforms, ocean-going fishing boats, etc., since the mainland power grid cannot be covered, it is generally necessary to be equipped with diesel generators or power generators to meet the power and power needs. For diesel engines, the energy conversion efficiency of fuel oil is very low, only about 40% is converted into mechanical work of the internal combustion engine, and the remaining 60% is waste heat. About 30% of the waste heat is taken away by the exhaust gas, about 25% of the waste heat is taken away by the cylinder jacket cooling water, and other waste heat losses account for about 5%. This causes energy waste when the diesel ...

AI Technical Summary

Problems solved by technology

However, the current mainstream and mature low-temperature multi-effect distillation and reverse osmosis seawater desalination technologies all have problems of high energy consumption and high cost.

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