New-energy-power-generation-based MVR seawater desalination system

Abstract

The invention provides a new-energy-power-generation-based MVR seawater desalination system and belongs to the technical field of seawater desalination. The new-energy-power-generation-based MVR seawater desalination system comprises a new energy power generation system, a filter device, a first-stage heat exchanger, a second-stage heat exchanger, an electric heating device, an evaporator, a vapor-liquid separator, an MVR steam compressor and the like. The MVR steam compressor is utilized to perform waste heat recovery and utilization on secondary steam, and the electric heating device is adopted to provide start-up steam and provides an external energy to an MVR steam recovery system when an amount of the secondary steam is insufficient, so that the stability, the reliability and the efficiency of running of the MVR system are effectively improved; meanwhile, renewable energy can be fully utilized without introducing a power supply from the external, and the system runs by directly and independently installed on the sea; and by combining with an automatic control system, maintenance-free and unattended operation running of the seawater desalination system is realized. The whole system has the advantages of small size, low cost, freedom of maintenance, independent running, little energy demand, simpleness in operation, energy conservation and environmental protection and the like and is very suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to an MVR seawater desalination system, in particular to a system for desalination of seawater based on new energy generation and using MVR technology. It belongs to the technical field of seawater desalination. Background technique [0002] With the development of society and economy, the fresh water consumption of coastal areas and island residents is increasing day by day. The serious shortage of fresh water makes the construction of islands stagnant, and even island residents give up living on islands and move back to inland life, resulting in the desertion of coastal islands. Due to the increasing shortage of fresh water resources, the development of seawater desalination technology has extremely far-reaching significance. Traditional single-effect and multi-effect evaporation technologies need to provide a large amount of raw steam, and need to be equipped with coal-fired boilers and cooling systems, which will cause unavoi...

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Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention proposes an MVR seawater desalination system based on new energy power generation, which makes full use of renewable energy such as solar energy, wind energy and tidal energy to generate electricity, without external power supply, and can be directly installed and operated independently on the sea ;The use of MVR vapor compression recycling system greatly reduces the waste of energy, greatly reduces the demand for external energy, the capacity requirements for renewable energy power generation systems are also reduced, and reduces the overall investment; the use of MVR single-effect evaporation , which reduces the complexity and investment cost of the system; the electric heating system is used to provide an external heat source for the start-up and normal and stable operation of the MVR vapor compression recovery system, which effectively improves the stability, reliability and efficiency of the MVR system operation. Control system to realize maintenance-free and unattended operation of seawater desalination system

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