Combined air colder

Abstract

The invention discloses a combined air colder. The combined air colder comprises a draught fan, a finned pipe bundle, a mist catcher, an evaporating pipe bundle, a spraying water pump, a nozzle and a water tank, wherein the mist catcher is positioned between the finned pipe bundle and the evaporating pipe bundle; and the mist catcher is of a honeycomb structure or a corrugated plate structure. By catching water mist, the mist catcher reduces the corrosion of a fin and adjacent equipment caused by the water mist, prevents the water mist on the surface of the finned pipe bundle in a high-temperature area from scaling, and ensures a dry air-cooling effect of the finned pipe bundle. According to the physical property and the heat load of a hot fluid, the number of rows of finned pipes and the number of rows of evaporating pipes are determined optimally, the energy consumption of the draught fan is saved and the scaling formulation of the evaporating pipe bundle is lightened so as to ensure long-term and high-efficiency heat exchange of the evaporating pipe bundle. The combined air colder brings not only the dry air-cooling effect but also an evaporative air-cooling effect into full play, and ensures long-term reliable operation of the combined air colder.

Description

technical field [0001] The invention relates to an air cooler, in particular to a combined air cooler combining dry air cooling and evaporative air cooling. Background technique [0002] The dry air cooler is mainly composed of finned tubes, and fans are generally used for forced ventilation outside the tubes. When the inlet temperature of the medium in the tube is between 80°C and 160°C, dry air cooling is suitable, because the thermal conductivity of the air outside the tube is small, so when the temperature difference between the inside and outside of the tube is large, dry air cooling has a better cooling effect. Therefore, dry air coolers are mainly used in air-cooled high-temperature areas. [0003] The evaporative air cooler is mainly composed of light pipes. In addition to forced ventilation by fans, there is also top-down spray water to form a water film on the surface of light pipes. Water film evaporation is a phase change process, which can absorb a large amoun...

AI Technical Summary

Problems solved by technology

[0006] The problem with existing combined air coolers is that in evaporative air cooling, the air flowing upward not only brings out evaporated water vapor, but also brings out a large amount of fine-grained water mist

This not only wastes water, but also causes calcium and magnesium ions in the water mist to scale on the surface of the finned tube bundle in the high temperature area, which seriously affects the cooling effect of the dry air cooling, and the fine water mist falls on the dry air cooling fins and adjacent equipment. Can cause fin corrosion and corrosion of adjacent equipment

[0007] Another problem existing in the existing combined air cooler is that the number of rows of finned tubes is fixed, and the distribution of the number of rows of finned tubes and the number of evaporating light tubes is unreasonable, resulting in thick scaling of the evaporating tube bundles, which seriously affects heat transfer , or the heat load borne by the evaporator tube bundle is not enough, and the advantages of strong evaporation, mass transfer and heat transfer capabilities are not fully utilized

Images