Natural-draught brine cooling tower

Abstract

The invention discloses a natural-draught brine cooling tower. The natural-draught brine cooling tower comprises a drift eliminator, a water distribution device, a stuffing area, a lambada-shaped support, a water collecting tank, a tower casing and a brine temperature-concentration control device. The brine is heated by a waste heat source, and the hot brine is sent to the water distribution device in the tower casing through an intake and riser pipe. The hot brine is uniformly sprayed on the stuffing by the water distribution device and exchanges heat with the intake air from the lambada-shaped support at the lower part of the tower casing, and the temperature and the concentration of the brine are adjusted to enable the saturated evaporation pressure to be matched with the vapor partialpressure in the air so as to restrain the evaporation and the loss of the water, thereby achieving the purpose of saving water. After cooled, the brine enters the water collecting tank, and returns to the waster heat source via a circulation brine pump for further circulation. The hot air enters the upper part of the tower casing with drifts eliminated by the drift eliminator, and then is exhausted to the upper air. The flow of the air is promoted by the chimney effect generated by the tower casing. By using the brine as the cooling medium, in addition to the function of saving water, the invention can also cool the brine to almost the environmental temperature in winter, thereby achieving the frost prevention effect. The invention can be widely used in the power field, the chemical industry field and the metallurgy field in the water-deficient area.

Description

technical field [0001] The invention relates to a heat dissipation device, in particular to a naturally ventilated brine cooling tower with adjustable heat exchange, water saving and antifreeze effects. Background technique [0002] my country is one of the 12 water-poor countries in the world, and its fresh water resources are less than 1 / 4 of the world's per capita share. my country's per capita fresh water resources are about 2700m 3 , ranking 84th in the world. With the development of the national economy, the water used for industry, agriculture and domestic use in urban and rural areas of our country will increase rapidly, which will make the originally limited fresh water resources more tense. For example, thermal power plants are major water users. A 1000MW large thermal power plant consumes about 100,000 tons of water per day, which is equivalent to the water consumption of a medium-sized city. At present, there is a lack of effective water-saving technology. The...

AI Technical Summary

Problems solved by technology

The western region of my country is rich in resources, including coal resources, but the serious shortage of water resources restricts the development and utilization of coal and the development of pit-mouth power plants, and ultimately restricts the development of the central and western regions

However, transporting coal to the east not only increases the cost of power generation, but also tends to lead to a shortage of electricity and coal when the traffic is not smooth.

[0003] In cold and icy areas, whether it is a counterflow or crossflow cooling tower, there is a common problem of severe icing during winter operation, which seriously affects the normal operation of the cooling tower and shortens the service life of the cooling tower

Various anti-icing measures are taken for this purpose, including keeping the cooling water above a certain temperature, which not only increases the operating cost of the tower but also cannot cure the freezing problem

[0004] The air-cooling technology currently used in some areas, such as the widely used direct air-cooling system, although water-saving is obvious, but its cooling performance is greatly affected by the meteorological conditions of the working environment, such as temperature, wind speed and wind direction, etc., and the working back pressure range of the unit is large. Manufacturing and running costs are high

In summer, the back pressure is high and the coal consumption is high. In winter, when the ambient temperature is low, the tube bundle is prone to freezing. The operation for anti-freezing is complicated and the operating cost is increased.

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