Large wet type cooling tower controllable air inlet system

Abstract

At the lower portion of a cooling tower, one or more air guiding pipes are arranged in a rain area or a water pond or below the water pond to a center area, outlets of the air guiding pipes are elevated out of the water level of the water pond, the outer ends of the air guiding pipes are connected with one or more draught fans, the air volume is manually controlled or controlled through a frequency converter or a PLC, the amount of cooling air entering the cooling tower is changed, cooling failure and invalid areas of the center area of the cooling tower are eliminated, the bad influence of the area is eliminated, and the efficiency of the cooling tower is constantly controlled at the best level. The economic efficiency and safety of a power station and chemical enterprises are obviously improved through the improvement of the efficiency of the cooling tower.

Description

technical field [0001] The invention belongs to the technical field of cooling equipment, and relates to a large-scale wet cooling tower controllable air intake system suitable for use in thermal power plants, nuclear power plants and large-scale chemical enterprises, and specifically refers to a system for artificially feeding the central area of ​​a large-scale wet cooling tower. Or the system equipment that can automatically control the air intake and can effectively improve the efficiency of the cooling tower. Background technique [0002] Large-scale wet cooling towers are mainly used in thermal power plants, nuclear power plants, and large chemical companies. They are important equipment at the cold end of thermal systems, and their working efficiency plays an important role in the economy and safety of enterprise production. Limited to the structure of the cooling tower itself, there is an area of ​​poor efficiency or failure in its center. Reducing or eliminating t...

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Problems solved by technology

The technologies used to solve this problem, such as air duct technology, layered air intake technology, etc., can partially solve the above problems, but there are still shortcomings: such as passive air intake, which cannot be adjusted according to requirements; water cooling in rainy areas is occupied The area reduces the cooling effect of the cooling tower; the layered air intake technology requires relatively high installation technology and cost

[0003] From the perspective of the development of large-scale wet cooling towers, the diameter is getting larger and larger, and the area of ​​failure or failure is increasing; for power plants, the load change range and frequency are much larger than before, so the change of cooling tower working conditions is more obvious. It is complicated, and there is no method for monitoring and evaluating the cooling efficiency of cooling towers in actual operation; there is no other effective method to control the efficiency of cooling towers except for controlling the amount of circulating water.

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