RU2407970C1 - System of water reuse (versions) - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: system of water reuse implementing cooling stacks consists of cooling stacks interconnected with hydraulic circuits for water preparation and consumption. The cooling stacks have separate hydraulic circuits for water preparation and consumption. Each interconnected cooling stack consists of a case in a lower part of which there are installed at least two tanks for water collection. The tanks are interconnected with a compensating tube providing hydraulic independence of circuits for preparation and consumption of working water. Also, one tank is connected to a pump supplying water cooled in the cooling stack to a consumer. This water is returned through a valve along a pipeline into the second tank. From the second tank via a filter and the valve and along the pipeline water is supplied into the collector with sprayers arranged in an upper part of the cooling stack case. The system of control of hydraulic resistance of the filter is installed at the section between the filter and the valve. The system consists of a gauge and a valve. The system of control of hydraulic resistance of the system is installed at the section between the pump and a consumer.

EFFECT: raised efficiency of cooling stack operation.

2 cl, 2 dwg

Description

The invention relates to contact coolers, in particular to cooling towers, and can be used at thermal power plants for cooling circulating water.

The closest technical solution to the claimed object is a solution for A. with. USSR No. 435442, С02В 1/10 of 07/04/72, including a water recycling system using cooling towers interconnected by hydraulic circuits for the preparation and consumption of water (prototype).

The disadvantage of this method is the relatively low efficiency due to the low degree of atomization of the liquid by nozzles and uneconomical due to water overrun due to the lack of a plate sprinkler and a droplet eliminator.

The technical result is an increase in the performance of the tower.

This is achieved by the fact that in a circulating water supply system using cooling towers interconnected by hydraulic circuits for preparing and consuming water, each of the interconnected cooling towers contains a housing, in the lower part of which there is a tank for collecting water with a water recharge system for evaporation, which is connected to a pump that supplies the water cooled in the cooling tower to the consumer through the filter, and a filter hydraulic resistance control system is installed between the filter and the consumer tra consisting of pressure gauge and valve.

Figure 1 shows a diagram of a circulating water supply system using cooling towers for one consumer; figure 2 shows a diagram of a circulating water supply system with cooling towers having separate hydraulic circuits for the preparation and consumption of water.

The water recycling system using cooling towers contains cooling towers interconnected by hydraulic circuits for the preparation and consumption of water. For one consumer (Fig. 1), the system includes a cooling tower housing 1, in the lower part of which there is a tank 2 for collecting water with a recharge system 3 of water used for evaporation. The tank 2 is connected to the pump 6, which supplies the water cooled in the cooling tower to the consumer 8 through the filter 7. In the area between the filter 7 and the consumer 8, a filter hydraulic resistance control system is installed, consisting of a pressure gauge 9 and a valve 10. After heating the water in the consumer 8, it again enters through valve 11 through pipeline 4 to the manifold 5 with nozzles located in the upper part of the tower tower. The water is cooled by a counter flow of air coming in counterflow from below, and the cycle of the heat and mass transfer process is repeated.

The reverse water supply system with cooling towers having separate hydraulic circuits for preparing and consuming water (Fig. 2) includes a cooling tower housing 1 (a variant with several parallel connected cooling towers is possible - not shown), at least two of which are located in the lower part water collecting tank: tank 2 and tank 12 with a recharge system 3 of water used for evaporation. Tanks 2 and 12 (containers) are interconnected by a compensation pipe, which provides hydraulic independence of the circuits for the preparation of working water and its consumption.

The tank 2 is connected to the pump 6, which supplies the water cooled in the cooling tower to the consumer 8. In the area between the pump 6 and the consumer 8, a system for monitoring the hydraulic resistance of the system is installed, consisting of a pressure gauge 9 and valve 10. After heating the water in consumer 8, it again enters through the valve 11 through a pipeline 4 to a second tank 12, from which heated water by a pump 13 through a filter 7 and a valve 17 is fed through a pipeline 14 to a manifold 5 with nozzles located in the upper part of the tower body.

The water is cooled by a counter flow of air coming in counterflow from below, and the cycle of the heat and mass transfer process is repeated. In the area between the filter 7 and the valve 17, a hydraulic resistance control system for the filter 7 is installed, consisting of a pressure gauge 16 and a valve 15.

The water recycling system using cooling towers works as follows.

The cooling effect in the tower is achieved by evaporating 1% of the water circulating through the tower, which is sprayed by nozzles 5 and flows into the tank in the form of a film through a complex system of irrigation channels to meet the flow of cooling air pumped by fans (not shown). An effective droplet separator reduces water loss due to drip entrainment. The amount of droplet moisture carried away by the air flow depends on the density of irrigation and at a maximum value of 25 m ³ h · m ² ) does not exceed 0.1% of the volumetric flow rate of the cooled water through the cooling tower.

One of the important points for the most efficient use of cooling towers in a water circulation system is the optimal choice of hydraulic connection circuit diagrams. Hydraulic circuit diagrams may vary depending on the number of cooling towers used in one circuit, as well as on the nature of the consumer. The range of regulation of cooling tower performance is determined by the nature of the consumer. The simplest hydraulic circuit of a single tower used for one service site is shown in FIG. Water from cooling tower 1 enters tank 2, from where it is supplied to consumer 8 by a circulation pump 6 and then to cooling tower 1. In the field of industrial construction, especially when the flow rate of water circulating through the consumer cooler is noticeably lower than the flow rate of water circulating through the cooling tower, the scheme shown figure 2. Here, the return water from consumers 8 is settled in storage tanks (tanks) 2 and 12, the volume of which is calculated for about 5-10 minutes of operation of the installation. From it, the pump 13 (pumps) of the preparation of the working fluid pump water to the evaporative cooling towers 1. From the cooling tower, the cooled water enters a similar bath (tank). The main distinguishing feature of such a scheme is the hydraulic independence of the circuits for the preparation of working water and consumption, provided by the presence of a compensation pipe between the tanks (tanks). One container with a partition providing overflow between its parts can also be used. As a result of this, it is absolutely not necessary to constantly adjust the power of the cooling towers in accordance with the requirements of the user. Cooling tower fans can simply operate on / off. In addition, each such cooling tower always works at full load and provides the maximum possible cooling of water for given weather conditions. Both circuits are not susceptible to frost, since the cooling towers are completely drained into storage tanks installed indoors or underground.

In winter, the operation of cooling towers can be complicated due to the freezing of their structures, especially this applies to cooling towers located in harsh climatic conditions. Freezing of cooling towers can lead to an emergency condition, causing deformation and collapse of the irrigator due to additional loads from the ice formed on it. Therefore, in the winter period, fluctuations in thermal and hydraulic loads should not be allowed, it is necessary to ensure an even distribution of the cooled water over the irrigated area and not to allow a decrease in the density of irrigation in individual areas.

Claims (2)

1. A recycled water supply system using cooling towers, comprising cooling towers interconnected by hydraulic circuits for preparing and consuming water, characterized in that each of the interconnected cooling towers contains a housing, in the lower part of which there is a tank for collecting water with a water recharge system for evaporation, which is connected to the pump supplying the water cooled in the cooling tower to the consumer through the filter, and a hydraulic monitoring system is installed between the filter and the consumer oprotivleniya filter consisting of a valve and a manometer. 2. A recycled water supply system using cooling towers, comprising cooling towers interconnected by hydraulic circuits for preparing and consuming water, characterized in that the cooling towers have separate hydraulic circuits for preparing and consuming water, each of the interconnected cooling towers containing a casing, in the lower part of which there are at least two tanks for collecting water, which are interconnected by a compensation pipe that provides hydraulic independence of the working cooking circuits water and its consumption, while one tank is connected to a pump that delivers the water cooled in the cooling tower to the consumer, which again flows through the valve through the pipeline to the second tank, from which heated water is pumped through the filter and valve through the pipeline to the manifold with nozzles placed in the upper part of the tower tower, and in the area between the filter and the valve, a filter hydraulic resistance control system consisting of a manometer and a valve is installed, and a system is installed in the area between the pump and the consumer and control of the hydraulic resistance of the system.