Underground air inlet system of indirect air cooling tower for inhibiting adverse influence of environmental wind

Abstract

The invention belongs to the field of power station air cooling technology optimization, and particularly relates to an underground air inlet system of an indirect air cooling tower for restraining adverse influence of environmental wind. The system comprises an air cooling tower cylinder, supporting columns of the air cooling tower cylinder, an air cooling radiator, a chimney, a desulfurizing tower, a cover plate, a circular-truncated-cone-shaped underground air inlet channel, a flow guide plate, a drainage ditch and an earth surface plane. The air cooling tower cylinder is supported on the lower bottom surface of the circular-truncated-cone-shaped underground air inlet channel through the supporting columns; the chimney, the desulfurizing tower and the air cooling radiator are all arranged on the lower bottom surface of the circular-truncated-cone-shaped underground air inlet channel; the whole air cooling tower cylinder is located above the earth surface plane; the whole air cooling radiator is located below the earth surface plane; the cover plate and the earth surface plane are on the same horizontal plane and are hermetically connected with the bottom of the air cooling tower cylinder; and an annular inlet plane formed by the circular-truncated-cone-shaped underground air inlet channel and the cover plate is an air inlet of the underground air inlet system. According to the underground air inlet system of the indirect air cooling tower for restraining the adverse influence of the environmental wind, the negative influence of environmental wind on the cooling performance of the air cooling radiator can be restrained, and the summer-keeping and anti-freezing performance of the indirect air cooling system is improved.

Description

technical field [0001] The invention belongs to the field of power station air cooling technology optimization, in particular to an underground air intake system of an indirect air cooling tower that suppresses adverse effects of ambient wind. Background technique [0002] Restricted by water resources, indirect air cooling systems and air cooling towers have been widely used in water-scarce areas in northern my country. Its working process is: the cooling air flows through the radiator arranged vertically outside the air cooling tower, absorbing the heat released by the hot water in the radiator, resulting in an increase in temperature and a decrease in density, and the buoyancy force generated by the difference in air density inside and outside the air cooling tower Next, the cooling air is sucked in from around the outside of the tower and flows upwards, and finally discharged from the tower outlet. Since the radiator of the indirect air-cooling system is directly expose...

AI Technical Summary

Problems solved by technology

[0003] Existing studies have shown that under the influence of ambient wind, although the cooling air flow rate of the fan section on the windward side of the air-cooled radiator increases and the heat dissipation capacity is enhanced, due to several negative pressure zones formed inside and outside the air-cooling tower, the windward side and the leeward side The air intake of the fan section is reduced even more, and even "drafting" occurs, and the heat dissipation capacity is even worse

Therefore, under the action of the ambient wind, the cooling air flow of different sectors of the air-cooled radiator becomes extremely uneven, and the overall cooling performance of the air-cooled radiator decreases, resulting in an increase in the back pressure of the unit and a decrease in the thermal efficiency of power generation

At the same time, the three-in-one indirect air cooling technology arranges the desulfurization tower and the chimney in the tower, but under the influence of the external environment wind, the hot air flow in the cooling tower will be deflected, which will aggravate the corrosion of the tower wall by the flue gas

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