Horizontal tube falling film evaporation high-salt wastewater deep concentration device

Abstract

The invention relates to a horizontal pipe type falling film evaporation high salinity wastewater depth concentration device which comprises a horizontal pipe type falling film evaporation concentrator. The horizontal pipe type falling film evaporation concentrator is provided with a horizontally-arranged heat exchange pipe. A feeding pipe of the horizontal pipe type falling film evaporation concentrator is provided with a preheater, and a discharging pipe of the horizontal pipe type falling film evaporation concentrator is provided with a discharging pump. The horizontal pipe type falling film evaporation concentrator is provided with two sections of circulation concentration pipes. The horizontal pipe type falling film evaporation concentrator is provided with a steam return line, and the steam return line is provided with a steam recycle compressor. The steam return line is connected with a steam inlet pipe and then communicated to the heat exchange pipe of the evaporation concentrator, and the horizontal pipe type falling film evaporation concentrator is provided with a vacuum pump. The device can efficiently treat high salinity wastewater with low cost through depth concentration, the space occupied by the whole equipment is reduced by the adoption of the horizontal pipe type falling film evaporation concentrator, building and maintenance are convenient, and project initial investment and running cost are saved.

Description

technical field [0001] The invention belongs to the technical field of high-salt wastewater concentration treatment, and in particular relates to a horizontal tube type falling film evaporation deep concentration device. Background technique [0002] Coal mine energy is the main form of energy in my country. Coal chemical industry, coal coking, and power plant wastewater are all industrial wastewater with high salt content. The direct discharge or substandard discharge of such wastewater has caused irreversible damage to the human ecological environment. [0003] At present, the domestic concentration treatment technologies for high-salt wastewater mainly include vertical tube rising film, vertical tube falling film and forced circulation. The three process equipment usually have low heat transfer efficiency, high energy consumption, and large initial investment in equipment. The common shortcomings of these three types of equipment, and these three types of equipment need ...

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Problems solved by technology

[0003] At present, the domestic concentration treatment technologies for high-salt wastewater mainly include vertical tube rising film, vertical tube falling film and forced circulation. The three process equipment usually have low heat transfer efficiency, high energy consumption, and large initial investment in equipment. The common shortcomings of these three types of equipment, and these three types of equipment need to occupy a large three-dimensional space, maintenance is difficult, and the safety is low; the first two also have the disadvantages of low concentration multiples and high pressure for subsequent processing; the latter type of energy consumption and investment are also very large

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