Multi-effect vacuum boiling type sea water desalinization apparatus

Abstract

The invention relates to a multi-effect vacuum boiling type sea water desalinization apparatus. The device comprises a vacuum tank, a valve, a boiling assisting device, a vacuum pump, a condenser, a heat exchange and heat dissipation device, a heat conduction and heat dissipation device, a heat source device, a fresh water pipe, a condensed fresh water pipe, a water outlet pipe and a gas guiding pipe, wherein the interior of the vacuum tank is divided into a fresh water bin, a vacuum condensation and evaporation bin, a vacuum heating and evaporation bin, a vacuum preheating bin; sea water is continuously input to and discharged from the vacuum tank by the valve; different vacuum pressures are maintained in the bins; in the vacuum tank, the speeds of heat conduction, heat dissipation and heating are high, steam is condensed fast in vacuum, the vacuum degree in the vacuum tank is high, and the water vaporization boiling point is low; and the boiling assisting device can continuously supply gas to a vaporization center to prevent bumping and ensure continuous and stable boiling; the evaporation bins with stepped different vacuum pressures have corresponding diminishing-effect water vaporization temperatures, so that multi-stage and multi-effect recycle of steam heat is achieved, and the processing cost of sea water desalinization is greatly reduced.

Description

technical field [0001] The invention relates to a seawater desalination device, in particular to a multi-effect vacuum boiling type seawater desalination device. Background technique [0002] The existing seawater desalination methods mainly include distillation and reverse osmosis. Distillation seawater desalination technology is the earliest desalination technology put into industrial application, including multi-stage flash evaporation technology and low-temperature distillation technology. Low-temperature distillation seawater desalination technology is to keep a certain degree of vacuum in the evaporation chamber, the pressure is very small, the seawater boiling evaporation temperature in the vacuum evaporation chamber is low, the seawater is heated, the water turns into steam, and the steam condenses into fresh water when it is cold; low-temperature boiling Although the distillation seawater desalination technology is mature and reliable in operation, the main problems...

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Problems solved by technology

Low-temperature distillation seawater desalination technology is to keep a certain degree of vacuum in the evaporation chamber, the pressure is very small, the seawater boiling evaporation temperature in the vacuum evaporation chamber is low, the seawater is heated, the water turns into steam, and the steam condenses into fresh water when it is cold; low-temperature boiling Although the distillation seawater desalination technology is mature and reliable in operation, the main problems are the low water production capacity of a single device, high unit power consumption, poor heat conduction efficiency, and low heat energy utilization rate. production costs remain high

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