Method to cool circulating water in cooling pond

FIELD: heating.

SUBSTANCE: invention relates to the field of power engineering and may be used in return systems of water supply to thermal power plants with a cooling pond. The method includes discharge of warm water into the cooling pond, its cooling and intake of cooled water. To reduce temperature of water taken, barriers are installed onto the bottom of the cooling pond between the discharge and water-intake channels in the amount from 1 to 3, one end of which rests against the shore of the cooling pond of the thermal power plant, and the other one stretches towards the centre of the water area of the cooling pond. Installed barriers forward the natural flow of the circulating water from the thermal power plant shore to the centre of the pond. The height of barriers exceeds the water level in the pond by 0.5 m.

EFFECT: higher efficiency of cooling of discharged circulating water of a thermal power plant.

1 dwg

 

The invention relates to the field of energy and can be used in circulating water systems of thermal power plants with water-cooler.

There is a method of cooling the circulating water in the pond-cooler [RU NO. 2162919, EV 1/00, EV 7/04, WV 1/34, publ. 10.02.2001], which includes the discharge of warm water in the cooling pond, cooling and water intake, more efficient use of evaporation of the cooling pond by raising the bottom layers of the water supply part of the discharged warm water in the bottom part in the area of water intake. The swirling flow of the discharged warm water is through an expanding nozzle with an inner curved spiral guides installed on the pipeline at an angle of 45 to the course of transit flow and placed at the level of the water surface in the pond. Water is drawn selective intake.

The disadvantage of this invention is the lack of heat transfer due to incomplete use of the contact between the water of the cooling pond and cold atmospheric air.

The closest technical solution, selected as a prototype, is a method of cooling the circulating water in the pond-cooler [SU # 800308, EV 1/00, publ. 30.01.1981], including the discharge of warm water in the cooling pond, the cooling and intake chilled water, the more effect the main use of evaporation of the cooling pond by raising the bottom layers of the water supply part of the discharged warm water in the bottom part in the area of water intake.

The disadvantage of this technical solution is incomplete the effect of heat and mass transfer of a mirror surface of a pond-cooler and the cold air due to the presence of only translational motion of the cooled water.

The technical result of the present invention is to reduce the intake temperature of the water, increasing the economic performance of power plants.

The technical result is achieved in that in the method of cooling the circulating water in the reservoir-cooler, including the discharge of warm water into the water-cooler, the cooling and intake cooling water, what is new is that with the aim of reducing the temperature of the water consumption and improve the economic performance of power plants, on the bottom of the reservoir-cooler between sbresny and water channels set barriers in the amount of from 1 to 3, one end of which rests on the shore of the reservoir-cooler thermal power plant, and the other is towards the center of the reservoir, the height of barriers to 0.5 m higher than the water level in the reservoir-cooler.

The invention is illustrated by drawings. Figure 1 shows a diagram of the proposed method.

When the circulating water system, as, for example, at Berezovskaya GRES-1 (, Sharypovo, Krasnoyarsk region), the bulk of the wastewater moves through the switchgear is in the direction coinciding with the natural flow in the reservoir. Most of this mass is repeatedly passes through the condensers cooling systems. During the examination of the temperature field in the vicinity of the spillway was found that the distribution of heat flow prevents the counter natural flow regulated rivers, which in the upper part of the reservoir quite significantly. This leads to the fact that the water circulation is carried out on a minimal path from the discharge to the intake channel along the shore. In heat and mass transfer involved insufficient for efficient cooling of the area, which leads to increased water temperature on water intake and reducing the economic performance of power plants. To resolve this problem between sbresny and water channels establish special barriers to the bottom of the reservoir in an amount of from 1 to 3, which guide the natural flow of the circulating water from the shores of the power plant to the centre of the pond. The height of barriers to 0.5 m higher than the water level in the reservoir-cooler. This ensures that the radial distribution of heat flow and, accordingly, the cooling water consumption by lengthening the path of the circulating water in the reservoir and increase the length natural ohlord is of water.

These differences allow to draw a conclusion on the conformity of the proposed technical solution the criterion of "novelty". The features distinguishing the claimed method from the prototype, have been identified in other technical solutions in the study of this and related areas of technology and, therefore, provide the claimed solution according to the criterion of "inventive step".

The method is as follows.

Warm water sprocname channel 1 is the area of the spillway of the reservoir-cooler 2. Further, due to the natural flow in the reservoir, the water runs into the intake 4 and meets the special barriers 3, installed on the bottom of the reservoir. When this happens redirect the natural flow of the circulating water from the shores of the power plant to the center of the reservoir, providing the radial distribution of heat flow and, accordingly, the cooling water consumption by lengthening the path of the circulating water in the reservoir and increase the duration of the cooling water in the surface layers. Special barriers installed in an amount of from 1 to 3, one end of which rests on the shore of the reservoir-cooler thermal power plants, and other acts towards the centre of the waters of the reservoir, the height of barriers to 0.5 m higher than the level of the water in the reservoir-cooler. The length of the barriers must be equal to the radius of the circulating cooling water flow that is determined by the specific conditions and specified in-situ measurements of the hydrological conditions at each specific water body.

Implementation of the proposed method of cooling the circulating water in the reservoir-cooler when the circulating water system will improve the efficiency of the cooling water, respectively, to reduce the temperature of the inflowing water, which will enhance the economic performance of thermal power plants by increasing the efficiency of cooling of the discharged warm water of power plants.

The method of cooling the circulating water in the reservoir-cooler, including the discharge of warm water into the water-cooler, the cooling and intake cooling water, characterized in that to reduce the temperature of the inflowing water and improve the economic performance of power plants, on the bottom of the reservoir-cooler between sbresny and water channels set barriers in the amount of from 1 to 3, one end of which rests on the shore of the reservoir-cooler thermal power plant, and the other is towards the center of the water area of the reservoir, the height of barriers to 0.5 m higher than the water level in the reservoir-cooler.



 

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