Salt-containing wastewater concentration treatment device with air as medium

Abstract

The invention discloses a novel salt-containing wastewater concentration treatment device with air as a medium. The novel salt-containing wastewater concentration treatment device consists of a packed tower (evaporator), a plate heat exchanger (condenser) and a heating module (low-grade heat energy and solar energy), wherein a humidification and dehumidification method is adopted; flowing air is taken as a vapor carrier to treat salt-containing wastewater in an evaporation concentration manner; air is humidified by the heated salt-containing wastewater in the packed tower, is fed into the plate heat exchanger according to different temperature gradients in the packed tower after a certain amount of vapor is carried, and is condensed and dehumidified, so that fresh water can be produced; condensation latent heat can be recycled to preheat the salt-containing wastewater. (See the structure chart in the drawings of the description) By adopting the novel salt-containing wastewater concentration treatment device disclosed by the invention, the defects that a conventional treatment method is high in energy consumption, up-front cost and later maintenance cost, production scale requirement, and requirement on foundation facilities in a production area can be avoided.

Description

Technical field: [0001] The invention relates to equipment and technology for concentrating high-salt waste water (total salt content 1% to 3.5%) to obtain fresh water, and belongs to the technical field of waste water treatment, and also belongs to the field of energy saving and emission reduction. Background technique [0002] Fresh water is a basic natural resource and a strategic economic resource, a controlling factor of the ecological environment and an integral part of the country's comprehensive national strength. Only 3% of the water on earth is potable. About 25% of the world's population does not have enough fresh water, and more than 80% of countries face severe water scarcity. With the expansion of drought and desertification in the world, the severity of water resource problems has been exacerbated. [0003] Concentrating saline wastewater is an effective way to deal with the freshwater crisis. Saline wastewater refers to inorganic salt wastewater with a tot...

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Problems solved by technology

[0007] The present invention aims at the problems of high energy consumption, high production cost input cost, unfavorable small-scale production, and need to be located in areas with better infrastructure in previous concentration treatment methods, and uses the principle of humidification and dehumidification to design a new concentration treatment Equipment and process

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