Low-temperature multi-effect distillation seawater desalting plant and technological method

Abstract

The invention discloses a low-temperature multi-effect distillation seawater desalting plant, which comprises a steam supply system, a water distribution system, an evaporation plant, a freshwater system and a concentrated water system, wherein the evaporation plant comprises an evaporator, a condenser, a flash tank and a steam pipeline, and the evaporator is a multi-effect evaporator and comprises a barrel, end sockets, flanges and necessary pipelines; the end sockets are connected with the barrel through the flanges to form evaporation rooms, the evaporation rooms are connected with one another through the flanges and the necessary pipelines to form a modular evaporation room; a support frame of the flash tank is arranged at the two sides of the bottom of an evaporator shell, and the flash tank is fixedly arranged on the support frame of the flash tank; the condenser is fixedly arranged on and is communicated with the rear section of the evaporator; and one end of the steam pipeline is communicated with the end socket, and the other end of the steam pipeline is communicated with the condenser through an assembling unit of a steam pipe. The heat is more reasonably transferred, the irreversible loss is reduced to the minimum, the heat utilization rate is improved, the cost is saved, the water producing rate is improved, and the occupied area is small.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to a low-temperature multi-effect distillation seawater desalination equipment and a process method. Background technique [0002] Seawater desalination, also known as seawater desalination, is the technology and process of separating salt and water in seawater. [0003] Distillation, that is, thermal method, is the earliest seawater desalination technology and the most important method for seawater desalination. Seawater desalination by distillation is the process of heating and evaporating seawater, and then condensing the steam to obtain fresh water. [0004] Multi-effect evaporation is to evaporate the heated seawater in multiple evaporators in series. Each evaporator is also called "effect". The steam evaporated from the previous effect evaporator is used as the heat source of the next effect evaporator, and Condensation becomes fresh water, and this process of evaporatio...

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Problems solved by technology

Through the improved combination of filter, evaporator, condenser and flange, the present invention overcomes the technical problems of easy heat loss, waste of energy, high cost, difficulty in cleaning the evaporator and relatively large equipment footprint in the prior art; Make the heat transfer in the equipment more reasonable, and the flux is large, so that the irreversible loss is minimized, the utilization rate of heat is improved, energy and cost are saved, the water production ratio is increased, and the equipment footprint is reduced

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