JPS61223487A - Condenser equipment - Google Patents

Abstract

PURPOSE:To provide the condenser equipment provided with a water packing type vacuum pump, developing good extracting performance of non-condensible gas, by a method wherein a pipeline, branched from a water supplementing pipeline and joining with the water supplementing pipeline at the downstream of the branch through a cooler, is provided in the equipment. CONSTITUTION:The cooler 6 is provided with the pipeline 17, branched from the water supplementing pipeline 16 and equipped with a choke valve 10, at the inlet of cooling water and with the pipeline 17a, connected to the downstream side pipeline 16a of the water supplementing pipeline 16, at the outlet of the cooling water. In such system, supplementing water, flowing from a water supplementing source 8 through the water supplementing pipeline 16, is flowed through the pipeline 17 to the cooler 6 after choking it by the choke valve 10 to a flow amount capable of cooling the water for the water packing of the water packing type vacuum pump 5 to cool the water for the water packing, then the cooling water, discharged from the cooling system, is joined with the supplementing water flowing through the supplementing water pipeline 16a to supplement it to a cooling tower 4. According to this method, the water for the water packing is cooled sufficiently since the temperature of supplementing water is lower than the temperature of cooling water, cooled in the cooling tower, in an area wherein a wet-bulb temperature is high and, whereby, the water packing type vacuum pump may develop good non-condensible gas extracting performance and the high degree of vacuum may be obtained.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

The present invention relates to condenser equipment that includes a cooling tower that allows cooling water to flow through and circulate through the condenser, and a water ring vacuum pump that extracts noncondensable gas from the condenser.

[Prior art and its problems]

In plants that use condensers, for example steam power plants with steam turbines, the cooling water used for cooling in the condenser is cooled by a cooling tower installed within the plant.
Furthermore, the cooling water cooled by this cooling tower is used to cool the water in the water ring of the water ring vacuum pump that extracts noncondensable gas in the condenser. The prior art will be described below with reference to the drawings. FIG. 2 is a system diagram of a conventional steam power plant equipped with a cooling tower, a condenser, and a water ring vacuum pump. Steam from a boiler (not shown in the figure) flows through a pipe 11 to a steam turbine! Exhaust steam flows into the condenser 2, performs work in the turbine, and is discharged. In the condenser 2, the steam in the condenser is cooled by cooling water, converted into condensation water, the inside of the condenser evacuated, and the condensed water is sent to the boiler through a pipe line 12. This cooling water flows from the cooling tower 4 through the pipe 13 by the circulating water pump 3, flows into the condenser 2, flows through the pipe 13a, returns to the cooling tower 4, and flows into the condenser 2 in the cooling tower 4. Cooling water that has been heated up is cooled down. When steam is cooled to condensate in the condenser 2, the non-condensable gas contained in the steam is passed through a pipe 18 connected to the non-condensable gas extraction port of the condenser to a water ring vacuum pump. 5, it is compressed to atmospheric pressure and released into the atmosphere, and the condenser has a predetermined degree of vacuum. Since the degree of vacuum obtained by the water ring vacuum pump 5 is limited by the temperature of the water in the water ring, it is necessary to cool the water in the water ring in order to obtain the required degree of vacuum. Therefore, the water in the water seal flows through the pipe 14, flows into the cooler 6, is cooled by the cooling water flowing inside the cooler 6, and circulates inside the vacuum pump via the pipe 14a. This cooling water branches from the pipe 13, passes through the pipe 15 provided with the throttle valve 7, flows through the cooler 6, and then flows through the pipe 15.
a, and is merged with the cooling water discharged from the condenser 2 flowing through the pipe line 13m. Cooling water that evaporates and decreases in the cooling tower 4 for cooling is supplied to the cooling tower 4 from a makeup water source 8 such as a river via a pipe 16 by a makeup water pump 9. As mentioned above, the water in the water ring of a water ring vacuum pump is cooled by cooling water cooled by a cooling tower. The cooling performance of a cooling tower is affected by temperature and humidity, so in areas with high wet bulb temperatures, the temperature of the cooling water cooled by the cooling tower will be high. For this reason, the water in the water ring of a water ring vacuum pump is not cooled sufficiently because the temperature of the cooling water flowing through the cooler is high.
Therefore, the degree of vacuum obtained is lowered depending on the temperature of the water in the water seal. Furthermore, if the temperature of the cooling water in the condenser is higher than the permissible temperature of water in the water ring, which would cause cavity silane in the water ring vacuum pump, it becomes impossible to use the water ring vacuum pump, and the steam ejector The problem was that I had no choice but to rely on it.

[Purpose of the invention]

In view of the above-mentioned points, the present invention provides a condenser equipped with a water ring vacuum pump that can exhibit good non-condensable gas extraction performance by simply using existing equipment even in regions with high wet bulb temperatures. The purpose is to provide facilities.

[Key points of the invention]

According to the present invention, the above object is to provide a cooling tower which is replenished via a make-up water pipe to reduce the loss of cooling water due to transpiration, and to cool steam containing non-condensable gases by the cooling water cooled in this cooling tower. The cooling system consists of a condenser that condenses into water, and a water ring vacuum pump that extracts non-condensable gas from the condenser, and the water from the water ring of this vacuum pump flows through the cooler. In a condenser facility cooled by water, this is achieved by providing a pipe that branches from the make-up water pipe, passes through the cooler, and joins the make-up water pipe downstream of the branch.

[Embodiments of the invention]

The present invention will be described in detail below based on the drawings. FIG. 1 is a system diagram of a condenser facility including a cooling tower, a condenser, and a water ring vacuum pump according to an embodiment of the present invention. In FIG. 1, the same parts as in FIG. 2 are given the same reference numerals. In FIG. 1, steam turbine 1. Condenser 2. Cooling water circulation pump 3. Cooling tower 4゜water ring vacuum pump 5. The structure in which the make-up water source 8 and the like are connected by pipes is the same as that of the prior art, so the explanation will be omitted. A pipe line 17 with an angle of 1° is provided at its outlet, and a pipe line 17a is provided at the outlet thereof to connect to a downstream pipe line 16a of the make-up water line 16. In such a system, from the makeup water source 8 to the makeup water pipe 16
The make-up water flowing through the water ring is throttled by the throttle valve 10 to a flow rate that can cool the water in the water ring of the water ring vacuum pump, and is passed through the conduit 17 to the cooler 6 to cool the water in the water ring, and then discharged. The cooling water is passed through the pipe 17a, flows through the makeup water pipe 16a, and joins with the makeup water 4, thereby replenishing the cooling tower 4. With the above configuration, in regions with high wet bulb temperatures, the make-up water temperature is generally lower than the cooling water temperature cooled by cooling towers, so the water in the water ring is sufficiently cooled, and the water ring vacuum pump has good non-condensing properties. It has excellent gas extraction performance and can provide a high degree of vacuum. Note that since the amount of cooling water in the water seal is small and the temperature rise is small, it does not particularly affect the cooling performance of the cooling tower.

【Effect of the invention】

As is clear from the above description, according to the present invention, the make-up water in the cooling tower is used to cool the water in the water ring of the water-ring vacuum pump, so that the temperature of the make-up water can be maintained even in areas with high wet bulb temperatures. Since the temperature of the cooling water is lower than that of the cooling water cooled by the cooling tower, it is possible to improve the extraction performance of non-condensable gas in water ring vacuum pumps, and to prevent the cooling water temperature from causing cavitation in water ring vacuum pumps. This makes it possible to use a water ring vacuum pump even when the temperature exceeds the allowable temperature.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a steam power plant equipped with condenser equipment according to an embodiment of the present invention, and FIG. 2 is a system diagram of a steam power plant equipped with conventional condenser equipment. 2: Condenser, 4: Cooling tower, 5: Water ring vacuum pump, 6:
Cooler, 16. 16a: Make-up water pipe, 17: Pipe branched from the make-up water pipe, 17a: Pipe that joins the make-up water pipe. talent 1 difficulty

Claims (1)

[Claims] A cooling tower in which the loss of cooling water due to transpiration is replenished via a make-up water pipe, and a condenser that cools and condenses steam containing non-condensable gases using the cooling water cooled in the cooling tower to condensate. and a water ring vacuum pump for extracting noncondensable gas in the condenser, and in which the water in the water ring of the vacuum pump is cooled by cooling water flowing through a cooler. ,
A condenser facility comprising a pipe branching from the makeup water pipe, passing through the cooler, and joining the makeup water pipe downstream of the branch.