What is the function of graphite tower equipment?

Graphite tower equipment is a kind of equipment that uses the contact of water and air to dissipate waste heat generated in industry or refrigeration and air conditioning through evaporation. The basic principle is: after the dry (low enthalpy) air is pumped by the fan, it enters the cooling tower from the air inlet network; the high-temperature water molecules with high partial pressure of saturated steam flow to the air with low pressure, moist heat (high enthalpy) The water is sprinkled into the tower from the water seeding system. When the water droplets are in contact with the air, on the one hand, due to the direct heat transfer between the air and the air, on the other hand, due to the pressure difference between the surface of the water vapor and the air, evaporation occurs under the action of the pressure, which is brought to the current for the latent heat of evaporation, Take away the heat in the water, that is, evaporation and heat transfer, so as to achieve the purpose of cooling. The working process of the graphite tower equipment: the working process of the circular counter-flow cooling tower is an example: the hot water from the main engine room passes through the water pump to a certain pressure through the pipeline, the horizontal throat, the curved throat, and the central throat to press the circulating water to the graphite tower equipment. In the water spreading system, the water is evenly spread on the filler through the small holes on the water spreading pipe; the dry air with low han value enters the tower from the bottom air inlet network under the action of the fan, and the hot water flows through the surface of the filler At the same time, a water film and air are formed for heat exchange, and the hot air with high humidity and high han value is drawn from the top, and the cooling water drops into the bottom basin and flows into the host through the water outlet pipe. Under normal circumstances, the air entering the tower is dry air with low wet bulb temperature. There is obviously a difference in concentration of water molecules and a difference in kinetic energy pressure between water and air. When the fan is running, under the action of static pressure in the tower, The water molecules continuously evaporate into the air and become water vapor molecules, and the average kinetic energy of the remaining water molecules will decrease, thereby reducing the temperature of the circulating water. It can be seen from the above analysis that evaporative cooling has nothing to do with the temperature of the air (usually the dry bulb temperature) being lower or higher than the water temperature. As long as the water molecules can continuously evaporate into the air, the water temperature will decrease. However, the evaporation of water into the air does not go on endlessly. When the air in contact with the water is not saturated, the water molecules continuously evaporate into the air, but when the air on the water-air contact surface is saturated, the water molecules cannot evaporate, but are in a state of dynamic equilibrium. The number of water molecules evaporated is equal to the number of water molecules returned to the water from the air, and the water temperature remains the same. It can be seen from this that the drier the air in contact with the water, the easier the evaporation will proceed, and the easier the water temperature will be lowered.