Condensed steam source heat pump driven multi-effect horizontal pipe falling film distillation column

Abstract

The invention provides a condensed steam source heat pump driven multi-effect horizontal pipe falling film distillation column. A condensed steam source heat pump, heat pipe heat exchange, a horizontal pipe falling film and multi-effect distillation are integrated in a system, and the distillation column is a transboundary product of the heat pump industry, the heat exchange industry and the distillation industry. Last-effect secondary steam condensation latent heat is directly recycled through the condensed steam source heat pump, and it is achieved that a condenser independently provides a heat source needed by first-effect distillation. By means of open-type multi-level heat pipe overlaying, the distillation process of countercurrent flow heat exchange, the horizontal pipe falling film and single-column multiple effects is achieved, and the secondary steam condensation latent heat is utilized effect by effect. Integrated design of the condenser, a multi-effect horizontal pipe falling film distillation column and an evaporator is achieved. The multi-effect horizontal pipe falling film distillation process driven by the condensed steam source heat pump is achieved.

Description

[0001] (1) Technical field [0002] The invention relates to a multi-effect horizontal tube driven by a condensing steam source heat pump used in seawater desalination, food processing, beverage production, sewage treatment, water purification treatment, reclaimed water treatment, chemical industry, household water purification, commercial water purification, and household appliances Falling film distillation column. [0003] (2) Background technology [0004] Compressed vapor distillation device: Seawater is heated on the evaporation side of the evaporative condenser to distill secondary steam, which is compressed by the water vapor compressor to increase the pressure and temperature, and then re-entered into the condensing side of the evaporative condenser to be condensed as heating steam. The latent heat of condensation of fresh water is recovered at the same time to provide seawater distillation latent heat for its evaporation side, so that the driving energy consumption of...

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Problems solved by technology

[0006] However, the shortcomings of the compressed steam distillation device also restrict its further development: (1) the price of the steam compressor is extremely expensive, and the oil-free technology is relatively complicated, resulting in reduced product reliability and difficult maintenance; (2) the device is a large-scale chemical equipment, Therefore, it is difficult to realize miniaturization and household appliances; (3) neither can avoid the corrosion of the secondary steam to the water vapor compressor, nor can it avoid the corrosion of the water vapor compressor to the secondary steam, and cannot handle corrosive solutions and heat-sensitive materials. Take a high-standard injection; (4) Since the inflection point of the chemical activity of water is 60°C, a low-temperature distillation process below 60°C must be used for corrosive solutions or heat-sensitive materials, and due to the excessive density of water vapor in vacuum low, resulting in the suction displacement and cost of the water vapor compressor being hundreds of times higher than that of the heat pump compressor, resulting in extremely poor economy, slow delivery time, and high maintenance costs; (5) It is impossible to achieve full temperature range, full Distillation process in volume range

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