淬火液在冷却塔系统中是被循环冷却的核心工艺介质，而非冷却塔本身的常规冷却循环水，它在整个热处理冷却链路中承担着关键的工艺与运行支撑作用。
核心工艺作用
- 承接工件淬火热量：作为热处理环节的淬火冷却介质，直接与800-900℃的高温工件接触，快速吸收工件释放的大量热量，自身Temperature随之升高后被送入冷却塔完成换热降温，是连接淬火工艺与冷却塔散热的核心热载体。
- 保障淬火工艺精度：通过冷却塔持续控温，将淬火液稳定维持在20-50℃的最佳使用区间，依托其逆溶性特性精准调控工件表面的冷却速度，避免工件因Temperature失控出现变形、开裂，保障淬火后的工件硬度与金相组织达标。
系统运行层面作用
- 实现封闭循环换热：在淬火液专用Closed-Circuit Cooling Tower中，淬火液在304/316不锈钢换热盘管内全封闭流动，不与外部喷淋水、空气直接接触，既避免自身被杂质污染、氧化变质，也防止淬火液中的腐蚀性成分腐蚀塔体结构，大幅延长介质与设备的使用寿命。
- 适配连续化生产：替代传统自然冷却方式，无需长时间停机等待淬火液降温，可支撑热处理产线24小时连续作业，生产效率较自然冷却提升数倍，同时减少多台Water Pump的冗余能耗，降低长期运行成本。
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).
