SU787694A1 - System for cooling and refilling water losses of steam turbine plant - Google Patents

Description

The invention relates to a power system, in particular to the production of feed water, mainly for steam turbine plants of thermal power plants. 5

A known installation for the preparation of feed water, including sequentially installed filters loaded with ion-exchange materials [1].

The disadvantages of this installation are the significant consumption of filter material, pollution of natural water bodies with salt emissions and its bulkiness.

There is also known a cooling system 15 and make up for losses of a steam turbine installation, comprising a turbine condenser connected by circulating conduits to the cooling tower, and a distillation condenser connected by an additional water supply pipe to the condensate path of the installation. This system has an evaporator fed with turbine extraction steam, an upstream distillation pair (2).

A disadvantage of the known system is the high consumption of steam for the evaporation of additional water, which leads to underproduction of energy, which may include a device for separating air from the air-vapor mixture, consisting of an adsorber 8 of water vapor, included in a closed circuit with a heat exchanger 9 and an evaporator 10 (Fig. 2). A distillation condenser 11 for cooling water $ is connected between direct 12 and return 1 13 of the circulation conduits and is connected by a pipe 14 for supplying additional water to the condensate path of the installation, namely to the condenser 2. Yu

The system operates as follows.

The vapor-air mixture formed in the tower 4 due to the evaporation of part of the water cooling the condenser 15 2, is sucked out by the exhauster 6 through the hood 5 and fed to the moisture separator 7, in which the water drops are separated from the steam.

Then the steam-air mixture, purified from water droplets, is fed either to the distillation condenser 11 (Fig. 1) or to the adsorber 8 (Fig. 2), in which water vapor is absorbed by concentrated brine, and the air is vented to the atmosphere. The diluted brine 25 is fed through a heat exchanger 9 to an evaporator (stripper) 10, in which the brine is re-concentrated by the selected steam of turbine 1, which is supplied via a steam pipeline. The resulting vapor from the evaporator 10 is sent to the distillation condenser 11. e

The concentrated brine through the heat exchanger 9 is returned to hell-35 sorber 8, in which the absorption of vapors from the vapor-air mixture occurs (Fig. 2).

The distillate formed in the distillation condenser 11 is piped through water 14 to a condenser 2 to compensate for water losses in the cycle of a steam turbine plant.

Thus, the brine is not consumed, but, continuously circulating in the adsorber-heat exchanger system the evaporator, performs the role of a substance that extracts steam from the vapor-air mixture and releases it in the evaporator.

Claims (2)

The invention relates to a power system, in particular to the preparation of feed P-water, mainly for steam-turbine installations of thermal power plants. A known installation for the preparation of feedwater, comprising successively installed filters, loaded with ion-exchange materials 1 and 1. The disadvantages of such an installation are the considerable consumption of filter material, the pollution of natural water bodies with saline emissions and its bulkiness. Also known is a system for cooling and compensating for losses of a steam turbine plant, comprising a turbine condenser, connected by circulation with conduits to a cooling tower, and a distillation condenser connected to the condensate path of the plant with additional water supply. This system has an evaporator that is powered by steam from a turbine, which is pre-connected to a distillation steam distillation pair 2. A disadvantage of the known system is the high-flow steam consumption for evaporating the added water, which leads to underproduction of energy in the turbine and, therefore, reduced cost-effectiveness. The purpose of the invention is to enhance. efficiency of the system by using cooling tower waste steam. The goal is achieved by the fact that the system is equipped with a device for selecting a steam-and-air mixture installed above the cooling tower and a moisture separator connected to it, and the latter is communicated via a steam-air mixture with a distillation condenser. In addition, the system is equipped with a device for separating air from the vapor-air mixture, including: - between the moisture separator and the distillation condenser. FIG. 1 shows a system for cooling and replenishing water loss with a dehumidifier; on league. 2 - system supplied with a device for separating air from the vapor-air mixture. The system of a steam turbine plant with a turbine 1 and a condensate path, including condenser 2 and heating. 3, contains a cooling tower 4 above which a vapor-air mixture selection device is installed, made in the form of a cap 5 and an exhauster 6. After the exhauster, along the vapor-air mixture, a dehumidifier 7 is turned on, after which the device for air separation from the air-vapor mixture consists from the adsorber 8 water vapor included in a closed loop with a heat exchanger 9 and an evaporator 10 (Fig. 2). The distillation condenser 11 is cooled by a direct 12 and reverse 1 13 circulating water lines and is connected by a pipeline 14 to supply additional water to the condensate path of the installation, namely to the condenser 2. The system works as follows. The steam-air mixture formed in the cooling tower 4 due to evaporation of a part of the water cooling the condenser 2, with an exhauster 6 is sucked through the cap 5 and fed to the dehumidifier 7, in which the water droplets are separated from the steam. The vapor-air mixture, purified from water droplets, is then fed to a distillation condenser 11 (Fig. 1) or to an adsorber 8 (Fig. 2) in which water vapor is absorbed by a concentrated saline solution and the air is vented to the atmosphere. The diluted saline solution through the heat exchanger 9 is fed to the evaporator (desorber) 10, in which the saline is re-concentrated by the selected steam of the turbine 1 supplied via the steam line. The resulting vapors from the evaporator 10 are sent to the distillation condenser 11. The concentrated salt solution through the heat exchanger 9 is returned to the adsorber 8, in which the vapor is absorbed from the vapor-air mixture (Fig. 2). Formed in the distillation condenser 11 is distilled through pipe 14 and fed to condenser 2 to compensate for the loss of water in the cycle of a steam turbine plant. Thus, the salt solution is not consumed, but, continuously circulating in the adsorber system — the evaporator heat exchanger, performs the role of a substance that extracts steam from the vapor-air mixture and releases it in the evaporator. Claims 1. A system for cooling and replenishing water losses of a steam turbine plant, comprising a turbine condenser connected by circulation towers to a cooling tower, and a distillation condenser connected by a pipeline. supplying additional water to the condensate path of the installation, characterized in that, in order to increase efficiency by using the discharge steam of the cooling tower, the system is equipped with a steam-air mixture sampling device installed above the cooling tower and a water separator connected to it, and the distillation condenser is connected to it . 2. A pop-up system 1, characterized in that it is provided with a device for separating air from the steam-air mixture, including a moisture separator and a distillation condenser. Sources of information taken into account in the examination 1.Akolzin P.A. and others. Water regime of steam turbine units of supercritical parameters. P., Energie, 1972, p. 117 - 125.2. Schröder K. Thermal power plants of high power. M. -l., I960, p. 251 - 253. (futf {(eight Fi9.2