JPH0719762A - Direct contact condenser - Google Patents

Abstract

PURPOSE:To provide a direct contact type condenser provided with a water- deflecting device which can be installed easily and in which cooling water is prevented, from scattering from a spray nozzle to the side of a turbine. CONSTITUTION:Since a water-deflecting device 15 is provided for a spray nozzle 1 on the uppermost part of a cooling water feed pipe disposed in a condensing section 5 of a direct contact type condenser, a spray of water is prevented from getting into a turbine, which is located above the condenser, from the condenser by being intercepted by the device 15. Further, the device 15 can be easily mounted to the forward end of the nozzle 1 by tightening screws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low pressure turbine exhaust pipe, and more particularly to a direct contact condenser connected to a geothermal power generation turbine exhaust pipe.

[0002]

2. Description of the Related Art Generally, in thermal power plants and nuclear power plants,
A lot of surface condensers are used to obtain highly pure condensate and use it as cooling water, etc., but since there is no need to recover condensate at geothermal power plants, direct contact condensers should be used. There are many. That is, a jet type or tray type direct contact condenser in which turbine exhaust steam and cooling water are in direct contact is often used. FIG. 5: is a block diagram of the conventional direct contact type condenser. The condenser body 10 has a partition wall 8 extending symmetrically from the top plate and extending halfway between the bottom surface of the condenser body 10 so that the condenser body 10 is located in the central portion and in the left and right sides of the condenser portion 5. The gas cooling unit 6 is defined. Exhaust steam 14 from the low-pressure turbine 13 enters the condenser, and most of it condenses in the condensing section 5 with the cooling water particles to become condensed water, which flows down to the hot well 7 below, but is not condensed. The exhaust steam, the non-condensable gas contained in the exhaust steam, and the air that inevitably leaks into the turbine together,
It is guided to a gas extraction device (not shown) via the exhaust pipe line 9. Above the gas cooling unit 6, there is provided a water supply pool 12 which is a hollow flat container and has a plurality of gas pipe lines penetrating vertically, and the cooling water supply pipe 4 of the portion which stands upright in the condensation chamber 5 is provided. By disposing a plurality of spray nozzles 1 and 2 on the pipe wall and the lower surface of the water supply pool, respectively, the cooling water supplied through the cooling water supply box 3 can be supplied to the inside of the condensing part 5 and both sides. It is designed to be ejected into the gas cooling section 6.

[0003]

The cooling water sprayed from the spray nozzle contains a highly corrosive component (eg hydrogen sulfide) peculiar to geothermal water, and 12% chrome steel contains molybdenum and vanadium. If it comes into contact with a turbine blade added with or a casing made of carbon steel, it may adversely affect corrosion.

An object of the present invention is to provide a direct contact type condenser provided with a drainer which can prevent cooling water from scattering from a spray nozzle to the turbine side and can be easily attached.

[0005]

[Means for Solving the Problems] A condensing part defined in the center of a hollow container body, a gas cooling part defined on both sides of the condensing part, and a plurality of upright parts in the condensing part and the gas cooling part. In a direct contact condenser comprising a cooling water supply pipe of a book and water sprinkling means respectively arranged in the condensing part and in the gas cooling part, in the uppermost part of the cooling water supply pipe arranged in the condensing part. The above object is achieved by providing the water sprinkling means with a water draining device.

Further, the water draining device comprises a mounting member which is detachable around the tip of the water sprinkling means, and a water draining plate which is supported by the mounting member via a supporting member and is curved so as to cover the upper portion of the water sprinkling means. If constituted, it is suitable for preventing cooling water from entering the turbine.

[0007]

In the present invention, the sprinkler is provided in the uppermost sprinkler of the cooling water supply pipe arranged in the condenser of the direct contact condenser, so that the sprinkler from the uppermost sprinkler is drained. Not touch the turbine blade or turbine casing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram of a direct contact condenser equipped with a draining device according to an embodiment of the present invention. 1, the same parts as those in FIG. 5 are designated by the same reference numerals. In the present invention, the water draining device 15 is provided in the spray nozzle 1 which is the uppermost water spraying means of the cooling water supply pipe 4 in the condensing part 5.
FIG. 2 is a perspective view of the draining device of FIG. Drainer 1
5 is a mounting member 15a which can be mounted by tightening a screw 15d around the tip of the spray nozzle 1 or can be removed by loosening the screw 15d, and a drainer plate 15c which is supported by the mounting member 15a via a supporting member 15b and is curved.
It consists of and. FIG. 3 is a sectional view taken along line III-III in FIG. The draining device 15 includes an annular mounting member 15a,
It is composed of a support member 15b which is welded to the mounting member 15a and is widened toward the end, and a draining plate 15c which is welded to the support member 15b and is inclined and curved in the spray ejection direction and covers the tip of the spray nozzle 1. There is. The spray sprayed from the tip of the spray nozzle 1 is sprayed in all directions within a range of about 90 °, but the upward water drops hit the drain plate and are repelled downward. Therefore, cooling water does not enter the turbine from the lower part of the condenser, and there is no risk of corroding turbine blades and casing. The drainer 15 is made of stainless steel. The drainer 15 is inspected at the time of periodic inspection of the power plant.

[0009]

According to the present invention, since the sprinkler is provided in the uppermost sprinkling means of the cooling water supply pipe arranged in the condensing part of the direct contact condenser, the cooling water sprayed from the sprinkling means is provided. Since the spray is blocked by the draining device, cooling water containing corrosive substances and the like does not enter the low pressure turbine blade or the casing from the condenser. Therefore, the turbine blade or casing is not adversely affected by the cooling water.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a direct contact condenser including a drainer according to an embodiment of the present invention.

FIG. 2 is a perspective view of the water draining device of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a bird's-eye view of the draining device of FIG.

FIG. 5 is a configuration diagram of a conventional direct contact condenser.

[Explanation of symbols]

 1 Spray Nozzle as Sprinkling Means 2 Spray Nozzle as Sprinkling Means 3 Cooling Water Supply Box 4 Cooling Water Distribution Pipe 5 Condensing Section 6 Gas Cooling Section 10 Condenser Cylinder 11 Intermediate Cylinder 15 Draining Device 15a Mounting Member 15b Supporting Member 15c Draining Member 15d screw

Claims (2)

[Claims] 1. A condensing unit defined in the center of a hollow container, gas cooling units defined on both sides of the condensing unit, and a plurality of cooling water standing upright in the condensing unit and the gas cooling unit. In a direct contact type condenser provided with a supply pipe and water sprinkling means respectively arranged in the condensing section and in the gas cooling section, a water sprinkler is provided at the uppermost sprinkling means of the cooling water supply tube arranged in the condensing section Direct contact condenser characterized by having a device 2. The direct contact condenser according to claim 1, wherein the draining device is a detachable mounting member around the tip of the sprinkling means, and the sprinkling means supported by the mounting member via a supporting member. Direct contact type condenser characterized by comprising a draining plate curved so as to cover the upper part of the