Medium Frequency Furnace Cooling Water Temperature Requirements

by Luoyang Judian Professional Steel Casting and Rolling Equipment M

The cooling water of the medium frequency furnace relieves the heat generated during the working process of the furnace and drives the temperature of the equipment and surroundings to rise. If it is not cooled in time, it may affect the performance of the equipment and the power of the intermediate frequency electric furnace and even burn out the equipment. The role of intermediate-frequency furnace cooling water is very important. So do you know what the cooling water temperature requirement of the medium frequency furnace is?

Medium Frequency Furnace Cooling Water Temperature Requirements

Water temperature requirements: The inlet water temperature of the intermediate frequency furnace cooling water should be kept at 5~30°C, the outlet water temperature should be controlled at 30-40°C, and the outlet water temperature should be lower than 55°C. If the cooling water temperature is too low, condensation will occur, and if the water temperature exceeds 55°C, the cooling capacity will be lost. In order to save water, a circulating cooling system is usually used.

Parameter requirements for thyristor inverters: The cooling water pressure should be maintained stably at 0.15MPa, the water quality should be softened, the hardness should be less than P8, the resistance should be above 20kΩ, the insoluble matter in the water should be less than 0.03mg/L, and the water volume should be 8 tons/ When the outlet pipe inner diameter is greater than 3 inches.

The Hazards of High Cooling Water Temperature

Some data point out that when the temperature of the intermediate frequency furnace coil and cooling water increases by 25°C, its power consumption and resistance increase by 10.75% compared with before, and the power consumption per hour increases by 10.8kW·h, accounting for 2.7% of the total system power. When the load current passes through the power supply coil and water cable, the heating of the coil and water cable will cause the temperature to rise continuously, and the resistance will also increase. As the resistance increases, the heat generation will increase, which will further increase the temperature, so that the power supply line will heat up and the resistance will change. A vicious circle is formed, so it is necessary to cool the coil through cooling water while controlling the temperature of the cooling water to ensure continuous cooling. The overheating of the cooling water will not only affect the medium frequency furnace, but it may burn out the equipment when the power is serious, so how to solve it?

The Solution to the Overheating of the Cooling Water

When the cooling water temperature is too high, the electric bell of the medium frequency furnace will send out a continuous alarm, which mostly occurs in summer. The operator can release the hot water from the water outlet, and inject cold water into the circulating pool at the same time, so as to reduce the temperature in the cooling pool, wait for the alarm to stop, measure the water temperature, and restore the normal working state. In addition, it should be noted that the water temperature is too high may be caused by water pipe blockage, cooling water scaling, relay failure, and other reasons. After the cooling water temperature is restored, these aspects should be checked, and troubleshooting can truly solve the problem of cooling water overheating.