Brief description of dry and wet combination
Features: The upper part is air-cooled, and the lower part is wet-cooled.
In winter and transitional seasons, only air cooling is used to achieve zero water consumption. In summer, wet cooling is used to reduce equipment investment.
Structure: Wet cooling is placed horizontally, and air cooling can be placed horizontally on both sides, in the middle, or in a V-shaped shape in the middle. The outer shell of the air cooling part has an air inlet that can be closed and opened.
Advantages: Make full use of low temperature, use direct convection heat exchange, and no water consumption. In summer, due to the use of wet cooling, the coil area is reduced, which reduces investment
Main Advantage
The processing capacity of a single device can reach 500m³/h. The low evaporation of spray water can achieve a water saving rate of about 30%-85% throughout the year.
Wet and dry combined working process
The heat emitted by the production process equipment is transferred to the circulating medium, and the high-temperature medium passes through the closed pipe and enters the dry-wet combined closed cooling tower.
The high-temperature medium enters the dry cooling coil and transfers heat to the fins through the base tube, and exchanges heat with the high-speed airflow, taking away the heat energy and reducing the temperature.
The cooled medium then enters the wet coil, where the spray water evaporates and condenses to absorb heat and continues to cool down. The range is greater than that of the dry coil, but it requires the consumption of spray water.
The circulating medium is cooled by dry and wet coils to meet the process requirements, and then refluxes to the production equipment in a closed manner to transport heat again, and the cycle repeats.
Complementary heat exchange technology
The dry-wet combined cooling tower optimizes the combination of air cooling and evaporative cooling. Through innovative design, the two cooling methods are interdependent in structure and complementary in function. The intelligent control method can not only ensure the high efficiency of heat exchange, but also take into account the advantages of air cooling water saving and evaporative cooling efficiency, effectively giving play to the advantages of high efficiency, energy saving and water saving of the system.
High energy efficiency ratio/water and electricity saving
The tower body is low in height, saving civil engineering investment; the pump head is low, and the operating energy consumption is low; the ambient temperature setting point can realize the dry operation of stopping the spraying water;
Intelligent operation meets the needs of water saving and energy saving under different environmental conditions; the finned tube is always in a dry air environment and has a long service life; the spray pipe adopts a special coating anti-corrosion process, which is easy to clean and descale; the spray water can use low-grade reclaimed water, desulfurization wastewater, surface rainwater, etc., to increase the concentration rate and reduce industrial water consumption.
Advantages of dry and wet combination
Dry coil: zero water consumption, no scale on the outside of the tube, direct drop from high temperature, making full use of the low temperature characteristics of the project, using air to reduce the temperature of the high-temperature medium by about 2~4 degrees, and completely zero water consumption.
Wet type: high efficiency, large temperature difference, low investment, reducing the circulating medium to the required temperature of the production process and reducing the investment of dry coils.
Working principle
Dry and wet combined operation mode
At the same time, the air conditioning devices of the evaporation section and the air cooling section are turned on. The circulating water first passes through the air cooling section, and the ambient air sweeps across the fin tube to pre-cool the circulating water. The pre-cooled circulating water enters the evaporative cooling tube bundle and exchanges heat with the air and spray water flowing outside the tube to achieve a cooling effect.
Dry running mode
When the ambient temperature is lower than the design temperature, turn off the evaporation section air conditioning device and turn on the air cooling section air conditioning device. Stop spraying water and use air cooling to meet the circulating water temperature reduction process requirements.
Wet operating mode
When the temperature is extremely high in summer, turn off the air-cooling section air conditioning device and turn on the evaporation section air conditioning device. Turn on the spray water to cool the circulating water in the pipe by flowing air and spraying water outside the pipe.
When the temperature is extremely high in summer, turn off the air-cooling section air conditioning device and turn on the evaporation section air conditioning device. Turn on the spray water to cool the circulating water in the pipe by flowing air and spraying water outside the pipe.
