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11
2024
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07
Closed cooling tower antifreeze knowledge
The importance of closed cooling tower antifreeze 1. Anti-freezing measures for occasions that are basically not used in winter. If the closed cooling tower does not need to be operated in winter, the spray water and internal circulating water must be emptied when shutting down. The internal circulating water is recommended to use compressed air for forced emptying, and the carbon steel pipe heat exchanger is not recommended to use emptying to prevent freezing.
The importance of closed cooling tower antifreeze
1. Anti-freezing measures for occasions that are basically not used in winter. If the closed cooling tower does not need to be operated in winter, the spray water and internal circulating water must be emptied when shutting down. The internal circulating water is recommended to use compressed air for forced emptying, and the carbon steel pipe heat exchanger is not recommended to use emptying to prevent freezing.
There are two parts of antifreeze for closed cooling towers: spray water system and internal circulating water system (softened water). The antifreeze problem of spray water system is usually to increase the electric heater in the water tray, which is usually opened when the spray water is lower than 5 ℃ and stopped above 8 ℃. The temperature probe transmits the signal to the control cabinet to automatically control the start and stop of the electric heater. The power selection of the electric heater is determined according to the circulating water volume and the outside air temperature. The antifreeze of the internal circulating water system can be added with glycol solution or electric heating equipment. The freezing point temperature of the glycol solution is required to be selected below the local minimum temperature. For larger cooling system occasions, you can consider digging a pool to spray water into it, which can save the electricity consumption cost due to electric heating operation, and can also put drugs in the pool to improve the water quality of the spray water.
3, perennial operation of the occasion antifreeze problem perennial operation of the closed cooling tower, if equipped with electronic control system, may be due to the main system load changes brought about by the number of cooling tower operation changes, so also need to consider the problem of antifreeze. Unused equipment can be emptied before winter to prevent freezing.
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