Time-sharing anti-freezing control method of indirect air cooling tower

Abstract

The invention discloses a time-sharing anti-freezing control method of an indirect air cooling tower. The time-sharing anti-freezing control method comprises the following steps: 1, when the water discharging temperature of a sector is less than t1 DEG C or the average cooling column temperature is less than t3 DEG C, shutters of sector air cooling heat dissipation units are opened by taking the sector as a unit, and when the water discharging temperature of the sector is greater than t1 DEG C and less than t2 DEG C and the average cooling column temperature is greater than t3 DEG C and less than t4 DEG C, the shutters of the air cooling heat dissipation units of the sector are kept still, and when the outlet water temperature of the sectors is greater than t2 DEG C and the average coolingcolumn temperature is greater than t4 DEG C, the opening adjustment of the shutters of the air cooling heat dissipation units is started by taking the sectors as the unit; and 2, in the next preset time, each air cooling heat dissipation unit is taken as a unit, and when the temperature of coldest finned tubes is lower than t5 DEG C, the closing adjustment of the shutters of the air cooling heatdissipation units is started, and when the temperature of the coldest finned tubes is higher than t5 DEG C and lower than t3 DEG C, the shutters of the air cooling heat dissipation units are kept still, and when the temperature of the coldest finned tube is higher than t3 DEG C, the opening adjustment of the shutters of the air cooling heat dissipation units is started.

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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