真空炉配套冷却塔必须优先选用闭式逆流冷却塔，完全规避开式塔的水质污染、结垢堵塞风险，保障真空炉换热系统长期稳定运行。
? 核心选型参数
- 热负荷核算：按真空炉最大工况发热量计算，公式为热负荷（kCal/h）= 循环水量（m³/h）× 进出水温差（℃）× 1000，额外预留10%-15%余量，应对管道结垢、填料老化等损耗 。
- 适配当地Wet-Bulb Temperature：以福建泉州夏季室外计算Wet-Bulb Temperature为基准，确保出水Temperature与Wet-Bulb Temperature的逼近差控制在4℃以内，避免盛夏高温高湿天气下降温失效 。
- 温控精度匹配：针对钛合金等精密工件的气淬工艺，冷却速度控制精度需达到±1℃/s，Temperature波动不超过±3℃，保障工件合格率稳定在99%以上 。
- Material配置：换热盘管优先选用304不锈钢，塔体采用镀镁铝锌钢或不锈钢Material，FanMotor需达到2级及以上能效，降低长期运行能耗 。
Written by: Zhongliang Yiji Technical Department · 15 Years of Cooling Tower Selection Experience | Last Updated：2026-10-17
FAQ
How to choose between a closed-circuit and an open cooling tower?
For working conditions that demand clean water (such as vacuum furnaces, high-frequency furnaces, and injection machine hydraulic oil cooling), a closed-circuit tower is preferred: the cooled medium circulates inside the coil without direct contact with air, so it resists scaling, algae and particle contamination, with stable heat transfer and low maintenance. For ordinary recirculating water scenarios with tight water budgets or cost sensitivity, an open tower costs less upfront but requires supporting water treatment.
What are the footprint and connections of a 100 t closed-circuit cooling tower?
Taking a standard 100 m3/h closed-circuit tower as an example: overall dimensions are approximately 3500 x 1500 x 2800 mm with a footprint of about 5.25 m2; inlet and outlet piping is typically DN100, with a 5-10 C temperature drop under standard conditions. Refer to the product specification table for details; non-standard dimensions can be customised on site.
How do I size the pump and head for a cooling tower?
Pump flow is selected according to the rated circulating water volume of the cooling tower; head must account for pipeline friction losses, local resistance, equipment elevation difference and the necessary margin. Pressure-bearing equipment such as injection machines also requires reserve for the working pressure. It is recommended to hand the operating data (flow, temperature difference, installation height, pipe diameter and length) to technical staff for calculation, to avoid an undersized pump or excessive head that wastes energy.
What water treatment does a closed-circuit cooling tower need?
The outer circulating water of a closed-circuit tower still contacts air, so softened make-up water, periodic corrosion and scale inhibitor dosing, and control of the concentration ratio are recommended. The inner circulating medium should be softened water, antifreeze or pure water according to process requirements; outdoor installation in winter requires freeze protection (electric tracing or draining).
