| 摘要 |
FIELD: power engineering.SUBSTANCE: ventilation cooling tower comprises a body, a spraying device, a tank for liquid collection and a fan, the body comprises two parts - an upper part, comprising a spray nozzle and a drop separator, between which there is a header of a spraying device with nozzles and a lower part, in which there is a water chamber tank for collection of cooled water with a fan installed on it, besides, the body is made from thin-sheet stainless steel, and in the water chamber tank there is a diffuser, which represents a part of the body and is connected with the fan, made with a plastic impeller and a multi-speed electric motor. The nozzle comprises a body, a nipple and a coaxial swirler insert, and in the nipple there is an expanding channel for liquid supply into a cylindrical hole, which is made axisymmetrically to the body and changes into a coaxial figured hole made in the form of a Laval nozzle, and in the cylindrical hole of the body, axisymmetrically to it, there is a cylindrical swirler insert installed, which has external peripheral helical threaded channels, besides, along the axis of the swirler insert there is a central axial hole with helical thread on the inner surface, which is reverse to the direction of channel threading, at the same time the swirler insert is installed in the body via elastic gaskets and is pressed with the nipple by means of the threaded connection between the body and the nipple, the spray nozzle comprises tubular elements laid in layers in parallel to each other from thermoplastic material with a latticed wall. Besides, at the ends the tubular elements are welded to each other, tubular elements are made with triangular cross section, and between each layer of tubular elements across tubular elements along their every end there is a strip from thermoplastic material, which is welded with tubular elements in places of their contact with the strip, besides, in the process of welding the end sections of tubular elements and strips laid between them are melted, and monolithic end walls of the block are formed in process of melting, besides, cavities of each element and the annular space are filled with hollow polymer balls, besides, the diameter of the balls is by 5-10% more than the maximum size of the cell of the latticed wall of tubular elements.EFFECT: cooling tower performance improvement.4 dwg |
