Low-temperature spray evaporation waste water treatment device and waste water treatment method

Abstract

The invention discloses a low-temperature spray evaporation waste water treatment device and a waste water treatment method. The waste water treatment device comprises an evaporation concentrator and a heat exchange system, and the evaporation concentrator comprises an evaporation chamber with a waste water inlet and a condensation chamber with a pure water outlet; the evaporation chamber is communicated with the condensation chamber through a top channel and a bottom channel to form an air circulation channel, and a fan used for blowing air in the evaporation chamber into the condensation chamber is arranged in the top channel; a cold medium inlet of a heat recycling heat exchanger is connected with the evaporation chamber, and a cold medium outlet of a heat recycling heat exchanger is connected with a water distribution pipe of a water distribution layer of the evaporation chamber; a cold medium inlet of a heat release heat exchanger is connected with a pure water circulation water outlet of the condensation chamber, and a cold medium outlet of the heat release heat exchanger is connected with a hot medium inlet of the heat recycling heat exchanger; a hot medium outlet of the heat recycling heat exchanger is connected with a hot medium inlet of a heat absorption heat exchanger, and a hot medium outlet of the heat absorption heat exchanger is connected with the water distribution pipe of the water distribution layer of the condensation chamber. According to the low-temperature spray evaporation waste water treatment device and the waste water treatment method, the energy consumption is low, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of high-concentration coking-prone saline waste water treatment, in particular to a low-temperature spray evaporation waste water treatment device and a waste water treatment method. Background technique [0002] With the development of my country's industry, the generation of high-concentration saline wastewater is becoming more and more extensive, and the amount of wastewater is also increasing year by year, which has caused many harms to the ecological environment. For high-concentration saline wastewater, the industry mainly used to add water to dilute it and discharge it after biochemical treatment. Using this kind of treatment method not only wastes a lot of water resources, but also cannot control the total amount of salt discharged into the environment, which is difficult to achieve. Effective treatment of wastewater. [0003] In addition to the above-mentioned treatment methods, many other treatmen...

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Problems solved by technology

Multi-effect evaporation is one of the most energy-saving methods in distillation, but its main problems are: low single unit processing capacity, easy scaling, high-concentration wastewater is easy to coke, high engineering cost of equipment and low heat transfer efficiency, etc.

The device heats the waste water with the Carnot heating cycle device, and then blows the low-temperature evaporation and condensation under the cold air to obtain the treated water. The device does not make full use of the heat energy of the material and consumes a lot of energy.

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