An indirect low temperature multi-effect desalination system utilizing the exhaust heat of marine engines

摘要

The present invention provides an indirect low-temperature multi-effect desalination system using the exhaust heat of the marine engines, which comprises a low-temperature multi-effect desalination device, a low-temperature steam generator, and a heat recovery device disposed in the exhaust passage of the engine. The seawater is first pretreated and preheated and then fed to desalt the low temperature multi-effect desalination device, the first stage low temperature multi-effect desalting means, the condensate outlet and the low temperature steam generator being connected by conduits, the low temperature Steam generating device is connected via a riser and a downpipe with the heat recovery device. Provided that the heat recovery device is protected from corrosion, the present invention can ensure that the exhaust heat of the engine is fully utilized and can serve as a heat source for the low temperature multi-effect desalination device, thus providing the steam or hot water needed to produce the low temperature multi-effect desalination device.