Time-sharing antifreeze control method for indirect air cooling tower

Abstract

The invention discloses a time-sharing antifreeze control method for an indirect air cooling tower, which comprises opening and closing the shutters of the air cooling and heat dissipation units of the sector when the outlet water temperature of the sector is less than t1°C or the average cooling column temperature is less than t3°C , when the outlet water temperature of the sector is greater than t1°C and less than t2°C and the average cooling column temperature is greater than t3°C and less than t4°C, keep the shutters of the sector air-cooling heat dissipation unit still; when the sector outlet water temperature is greater than t2°C and the average cooling column temperature is greater than t4 When the temperature is ℃, the shutters of the air-cooling heat dissipation unit are opened in units of sectors; in the next predetermined time, when the temperature of the coldest finned tube is less than t5°C, the shutters of the air-cooling heat dissipation units are opened in the next predetermined time. Close the adjustment, when the temperature of the coldest finned tube is greater than t5°C and less than t3°C, keep the louvers of the air-cooled heat dissipation unit still, and when the temperature of the coldest finned tube is greater than t3°C, open the adjustment of the louvers of the air-cooled heat dissipation unit.

Description

technical field [0001] The invention relates to the field of power generation, in particular to a time-sharing antifreeze control method for an indirect air cooling tower. Background technique [0002] The resource endowment of rich coal resources and scarce water resources in northern my country has led to the basic use of air-cooled equipment as cold-end heat exchangers for thermal power generating units in these areas. Indirect air-cooling towers have been widely used in air-cooled generating units in these areas due to their outstanding ability to resist strong winds. However, after running for a period of time, it was found that in winter, the circulating cooling water of the indirect air-cooling tower is easy to freeze, because the liquid and solid forms of water have incompressible physical properties, once frozen, the tube bundle is very easy to be damaged. [0003] Publication No. CN207113650U title is " a kind of indirect air-cooling system antifreeze control devi...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, in the louver control logic of the indirect air-cooling tower, the louver adjustment is used as a means to adjust the antifreeze according to the sector water temperature and the average cooling column temperature. Install temperature measuring grating etc. in the center for antifreeze monitoring, and it is only used as an antifreeze monitoring method and not for feedback control

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