Less-packing arrangement structure and method for natural-ventilation counter-flow wet cooling tower

Abstract

The invention discloses a less-packing arrangement structure and method for a natural-ventilation counter-flow wet cooling tower. The less-packing arrangement structure is characterized in that a cooling tower water distribution and packing system is configured as follows: the interior of the tower is divided into N water distribution regions and N packing regions, the N water distribution regions comprise the circle center region with the tower center as the circle center and the N-1 annular regions located outside the circle center region and distributed in different radial positions, and the N water distribution regions are in one-to-one correspondence to the N packing regions in position; the water spraying densities of the different water distribution regions are different, and packing of the different packing regions is arranged at different heights. By means of the less-packing arrangement structure and method, on the premise of guaranteeing the cooling performance, the heat exchange area of the cooling tower can be effectively reduced, the consumption of the packing can be reduced, and the construction cost of the cooling tower can be reduced.

Description

technical field [0001] The invention belongs to the field of thermal power plants and atomic energy power generation, and is mainly based on the mutual matching of cooling tower air intake and water distribution in terms of heat exchange capacity and quantity to achieve enhanced heat exchange effects, thereby reducing as much as possible under the premise of ensuring the designed tower efficiency. The packing arrangement method with less packing amount can reduce the engineering cost of the cooling tower, and can be applied to the technical design, transformation and maintenance of the cooling tower. Background technique [0002] Counterflow wet natural draft cooling towers have been widely used in domestic power plants. At present, the thermal calculation of most counterflow wet natural draft cooling towers is mainly based on one-dimensional calculation. In the design, this method assumes that all the heat transfer and mass transfer in the cooling tower occurs in the fillin...

AI Technical Summary

Problems solved by technology

In fact, the humid cooling air outside the tower enters from the air inlet of the cooling tower. After absorbing heat and moisture in the rain zone, the air speed, humidity and temperature distribution in the radial direction of the bottom section of the filler are not uniform everywhere, resulting in uniform water distribution. Under certain conditions, the quantity and heat exchange capacity of humid air and water do not match everywhere, that is, some places with large air volume and strong heat exchange capacity have relatively small water volume, while other places appear to have too much water volume, which makes considerable The capacity of the number of cooling towers to enter the air has not been brought into play, which is the problem with the one-dimensional design

Obviously, in this case, the designed cooling tower area and filling amount are too large

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