SU542083A1 - Thorn cooling tower valve - Google Patents

Description

one

The invention relates to heat and mass transfer apparatus, in particular cooling towers, and can be used in thermal power plants for cooling circulating water in condenser and adsorbers.

Fan cooling towers are known that contain a housing with air inlet windows in the lower part and a water distributor and sprinkler fl installed at the top. In this case, heat and mass transfer occurs when countercurrent movement of water and air flows: water flows in the form of a film along the irrigation elements, air passes through the cooling tower from the bottom up.

The drawback of the cooling tower is the low efficiency of heat and mass transfer (since the air passing through the channels of the nozzle is quickly saturated with moisture) and drift entrainment that increases with increasing air velocity.

These drawbacks are eliminated in another known cooling tower, comprising a housing with air inlet windows, in which an air vent pipe and a sprinkler are installed with steps one above the other,

included in the cooled water in series, and in the air - separately 2.

In this cooling tower, the air flow has a complex movement: the first stage is countercurrent, and the second is combined with transverse and countercurrent air movement. Such an embodiment of the cooling tower does not allow air speeds to remain optimal for achieving effective heat and mass transfer in each stage, as well as to ensure complete uniformity of air distribution over the cross section of the irrigator.

The aim of the invention is to intensify heat and mass transfer and improve air distribution over the nozzle section.

The goal is achieved by the fact that the air inlet windows are located above the first stage and below the second stage of the irrigator, and the air vent pipe is in communication with the space between the stages.

Claims (2)

To increase the rigidity of the structure, the sprinkler can be attached to the suction pipe, and the latter can be placed in the center of the cooling tower. FIG. 1 shows a cooling tower in longitudinal section; in fig. - the same, but with the mounting of the irrigator on the central exhaust pipe. The cooling tower comprises a housing 1 with the first stage 2 and the second stage 3 of the irrigator, placed on it, the water distributor 4 and the separator 5 of condensed moisture. Air inlet windows 6 are located above the first stage 2, and windows 7 are located below the second stage 3 irrigators. A sump 8 serves to collect and remove chilled water. The air exhaust pipe 9 communicates with the space 10 between the stages and is connected to the fan 11. The pipe 9 can be installed in the center of the cooling tower, and the irrigator stages are fixed on it {FIG. 2). In making bodies from the nozzle wound into a roll, the pipe 9 can be used as a core for winding the rolls. The cooling tower operates as follows. Water from the water distributor 4 is supplied to the first stage 2 of the irrigator, where it is cooled by the air flow entering through the windows 6 under the conditions of the descending motorcycle and then flows down to the lower stage 3 of the irrigator as rain. The air in stage 3 enters through the windows 7 in countercurrent to the movement of water. Exhaust air flows after steps 2 and 3 are diverted from space 1O. Thus, the water maintains a constant direction along the height of the cooling tower, successively cooling in the irrigator steps, and the air flows have an opposite direction. Since the aerodynamic drag of the nozzle under the conditions of the descending motorcycle is small, as compared with the countercurrent, the air velocity in stage 2 can be taken higher than in stage 3 (the optimal air speed is 10- 20 m / s for countercurrent conditions (3-4 m / s), which can be achieved both by changing the height of the nozzle and by changing the equivalent geometric diameter of its channels. Such an embodiment of the cooling tower increases its efficiency, since at each stage water comes into contact with non-humid air, and because of the space between the stages, water is redistributed as it flows from one stage to another. When performing a cooling tower with a central exhaust pipe, the rigidity of the structure increases substantially, since the pipe in this case is used as the main supporting structure. Claims 1. A fan tower of a cooling tower, comprising a housing with air inlet windows, in which a vent pipe and a sprinkler are installed with two stages located one above the other, connected in series by cooling water, and In order to intensify heat and mass transfer and air distribution over the cooling tower cross section, the air inlet windows are located above the first stage and below the second stage of the irrigator, and the air exhaust pipe communicates with the space between the stages Mi 2. The cooling tower according to claim 1, characterized in that, in order to increase the rigidity of the structure, the irrigator is fixed on the air vent pipe, and the latter is placed in the center of the cooling tower. Sources of information taken into account in the examination: 1.Berman L.D. Evaporative cooling of circulating water, M., Gosenergoizat, 1957, 194-195. 2. Certificate of Authors No. 340864, F 28 C 1/06, 1970 eight FIG. one tt FIG 2