COMBINED COOLING TOWER Russian patent published in 2013 - IPC F28C1/00 

FIELD: power engineering.

SUBSTANCE: combined cooling tower comprises a casing in the form of a stack with air inlet windows in the lower part, a water trap, a water collecting pool installed under the cooling tower casing, a water distributing system with spray nozzles, outlet holes of which are directed upwards, an irrigation device, spray nozzles, for instance, of evolvent type, are arranged at the distance from the top of an irrigation device at the distance (0.1÷1.0)×h, where h - height of the irrigation device, besides, water head upstream the spray nozzle is in the range of 0.2÷1.0 atm. The irrigation device of the cooling tower is made in the form of a module from layers of polymer cellular pipes, and pipes are made as cylindrical, are arranged in all layers in parallel to each other and are welded at the ends of the module between each other in places of contact. At the same time cavities of each pipe and annular space are filled with hollow polymer balls, besides, the diameter of the balls is 5÷10% more than the maximum size of the pipe cell, and the system of recycling water supply has separate hydraulic circuits for water treatment and consumption, at the same time in the lower part of the cooling tower casing there are at least two tanks arranged for water collection, which are connected to each other by a compensation pipe, providing for hydraulic independence of operating water treatment and consumption circuits, at the same time one tank is connected with a pump, which supplies water cooled in the cooling tower to a consumer, and the water again arrives via a valve along the pipeline into the second tank, from which the heated water with the pump via a filter and a valve is supplied along the pipeline into the header with the nozzles, arranged in the upper part of the cooling tower casing, and in the section between the filter and the valve they install a system of filter hydraulic resistance monitoring, comprising a pressure gauge and a valve.

EFFECT: higher efficiency of secondary energy resources usage by increasing value of cooling tower active area without increase of aerodynamic resistance.

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