Seawater desalting plant continuously supplied with solar heat and method thereof

Abstract

The invention relates to a seawater desalting plant continuously supplied with solar heat and a method thereof and belongs to the seawater desalting (including inland brackish water) technical field, wherein the seawater desalting plant comprises a seawater cleaning system and a seawater desalting system; the seawater cleaning system is composed of extraction seawater well, a seawater sterilizing settling pond, a multi-stage ultra-filter tank and a clear seawater tank; the seawater desalting system is composed of a solar concentrating heat collection device, a solar heat storage tank, a clear seawater heater and a multi-stage seawater flash evaporator; the solar concentrating heat collection device is used for collecting solar heat energy through a heat-conducting working medium during daytime and storing the solar heat energy in the heat storage tank, and heating the clear seawater through the heat-conducting working medium until the seawater reaches a certain temperature; furthermore, hot seawater is conveyed to the multi-stage flash evaporator, sprayed and steamed stage by stage; and then fresh water and brine are separated out. The seawater desalting plant is capable of effectively collecting relatively scattered solar energy to heat and evaporate the seawater; the quality of the produced fresh water is up to the drinking water standard; and the solar energy is stored for producing fresh water through continuous operation during night without sunlight; as a result, the seawater desalting rate reaches 40% and the yielding capacity is high.

Description

technical field [0001] The invention relates to a seawater desalination device and method for continuous heating by solar energy, and belongs to the technical field of seawater desalination (including inland brackish water desalination). The invention can also be used in the field of sewage treatment. Background technique [0002] With the rapid development of my country's economy, the shortage of fresh water resources has become prominent in the economically developed areas of the southeast coast, and land subsidence has occurred in Beijing, Shanghai, Tianjin, Qingdao and other places due to excessive groundwater extraction. For this reason, since the 1980s, the country has successively carried out long-distance water diversion projects such as diverting Luanluan into Tianjin, diverting Yellow River to Qinghai, and diverting water from the South to the North. [0003] In addition to the huge investment, the long-distance water diversion project also occupies a large amount...

AI Technical Summary

Problems solved by technology

Solar energy has the advantages of wide distribution, unlimited reserves, clean collection and utilization, and zero CO2 emissions. It is a renewable energy source that has attracted widespread attention; There are various problems

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