JPH09264675A - Direct contact type condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform effective cooling of non-condensed steam at a gas cooling part even when a pressure of cooling water guided to the gas cooling part of a direct contact type condenser is low. SOLUTION: This direct contact type condenser comprises an upper drum body 1: a lower drum body 2 coupled to the lower part of the upper drum body 1 and condensing exhaust steam; and gas cooling parts 9 arranged at the right and the left of the lower drum body 2 and cooling non-condensed exhaust steam through injection of cooling water. The direct contact type condenser is provided at the periphery of the gas cooling part 9 with a vertically extending water chamber 10 and a plurality of spray nozzles 11 arranged at an upper and a lower part facing the inner surface of the water chamber 10. Even when a pressure of cooling water in the water chamber 10 is low, spray is injected up to a height corresponding to a water pressure, whereby non- condensed steam is effectively cooled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct contact condenser used in a geothermal power plant or the like for directly contacting steam discharged from a steam turbine with cooling water for heat exchange.

[0002]

2. Description of the Related Art Generally, in a direct contact type condenser, steam discharged from a turbine is brought into direct contact with each other to exchange heat with each other, so that the temperature difference between them can be made extremely small. It is often used in geothermal power plants that do not need to do so. The direct contact condenser receives the steam that has finished working in the turbine, directly contacts this steam with the cooling water in the condenser to condense the steam, and keeps the inside of the steam close to a vacuum to effectively drop the steam. Is installed in order to give the maximum to the turbine, and there is a jet type in which turbine exhaust steam and cooling water are in direct contact or a tray type using a tray. FIG. 5 is a vertical cross-sectional view of a conventional jet type direct contact condenser. In FIG. 5, the exhaust steam from the turbine enters the lower body 2 from above the upper body 1, is guided by the cooling water pipe 3 in the lower body, passes through the cooling water branch pipe 4, and is sprayed from the main nozzle 5. Direct contact with the cooling water droplets sprayed on, condenses and condenses into hot water. This hot water flows into the lower hot well 6 and is discharged by a hot well pump (not shown). The uncondensed exhaust vapor, the non-condensable gas contained in the exhaust vapor, the air forcelessly leaking into the turbine, and the like, pass under the partition walls 8 on the left and right and flow into the gas cooling unit 9. A water chamber 10 was provided above the gas cooling unit 9, and a spray nozzle 11 was attached to the lower portion of the water chamber 10 to inject cooling water. In the gas cooling section 9, the steam is guided by the cooling water pipe 7 and cooled by the spray injected from the nozzle to be condensed water, which flows into the hot well 6 below. The gas rising above the gas cooling unit 9 is guided to a gas extraction device (not shown) via the gas collecting pipe 12.

[0003]

Conventionally, when the water pressure in the water chamber 10 in the gas cooling section 9 is lowered, the spraying of the spray from the spray nozzle 11 is weakened, and the cooling performance in the gas cooling section 9 is deteriorated. When the water pressure of the cooling water drops extremely, the spray will not be generated. Further, when the cooling water is guided to the water chamber 10 by the cooling water pipe 7, it is necessary to use a large diameter pipe in order to reduce the pressure loss.

The present invention aims to enable effective cooling of uncondensed vapor in the gas cooling unit even when the water pressure of the cooling water introduced into the water chamber of the gas cooling unit of the direct contact condenser is low. It is an issue.

[0005]

An upper body for guiding exhaust steam from a turbine, a lower body coupled under the upper body for injecting cooling water to condense the exhaust steam, and arranged on the left and right sides of the lower body. In the direct contact condenser provided with a gas cooling unit for injecting cooling water to cool the uncondensed exhaust vapor, a water chamber extending vertically around the gas cooling unit, and a water chamber of this water chamber. By providing a plurality of spray nozzles arranged vertically facing the inner surface, a large number of spray nozzles are arranged vertically in the water chamber, so even if the water pressure of the cooling water drops, It is possible to cool the steam by generating a spray from a spray nozzle having a height corresponding to.

Further, since the water chamber has a space formed of a curved surface along the inside of the outer periphery of the gas cooling portion and a space formed of a flat surface along the partition wall inside the gas cooling portion, the space is vertically arranged. It is suitable for arranging the water chamber widely in the vertical direction and arranging the spray nozzle in the vertical direction.

If the spray nozzles vertically adjacent to each other on the inner surface of the water chamber are mounted with the horizontal mounting pitch shifted by a half pitch, the sprays are widely dispersed without crossing and the steam is cooled. It is valid.

Further, if the spray nozzles arranged so as to face the inner surface of the water chamber are mounted with the vertical mounting pitch shifted by a half pitch, the sprays are widely dispersed without crossing and are effective in cooling the steam. is there.

[0009]

1 is a vertical sectional view showing a part of an embodiment of a direct contact type condenser of the present invention, and FIG. 2 is II of FIG.
-It is a II sectional view. 1 and 2, the same parts as those in FIG. 5 are designated by the same reference numerals. In FIG. 1, the lower body 2 and the gas cooling unit 9 are hollow containers each having a so-called oval bottom surface defined by two parallel sides and two arcs. Solid arrows indicate the flow of exhaust steam from the turbine. Exhaust steam from the turbine enters the lower body 2 through the upper body 1, where the cooling water guided through the cooling water pipe 3 to the cooling water pipe 4 is jetted from the main nozzle 5 and the exhaust steam is It condenses into condensate and flows into the hot well below. The uncondensed exhaust steam, the non-condensable gas contained in the exhaust steam, and the air leaking into the turbine flow to the gas cooling units 9 arranged on the left and right of the lower body 2. In the present invention, a water chamber 10 extending in the up-down direction is provided around the gas cooling section 9, and a plurality of spray nozzles 11 arranged vertically so as to face the inner surface of the water chamber 10. The water chamber 10 has a space formed of a curved surface along the inside of the outer periphery of the gas cooling unit 9 and a space formed of a flat surface along the partition wall inside the gas cooling unit 9 that are arranged in the up-down direction.
Since a large number of spray nozzles 11 are vertically arranged in the water chamber 10, even if the water pressure of the cooling water drops,
Spray can be generated from the spray nozzle 11 having a height corresponding to the water pressure to cool the steam. Gas cooling unit 9
A gas collecting pipe 12 is provided above the water chamber 10, and the gas collecting pipe 12 is provided with a plurality of gas passage holes 13 from which gas is guided to a gas extraction device (not shown). The gas passage hole 13 is optimally arranged so that gas does not stay therein, and the diameter thereof may be small in the direction of the collecting pipe 12 near the gas extraction device and large in the distance.

FIG. 3 is an enlarged view taken along the arrow III in FIG. 2, and FIG. 4 is an enlarged view taken along the line IV-IV in FIG. The spray nozzles 11 arranged vertically adjacent to each other on the inner surface of the water chamber 10 are mounted with a horizontal mounting pitch shifted by a half pitch. In this way, the spray injected from the spray nozzle 11 is widely dispersed without crossing and is effective in cooling the steam. Further, if the spray nozzles 11 arranged so as to face the inner surface of the water chamber 10 are mounted with the mounting pitch in the vertical direction shifted by a half pitch, the sprays facing each other are widely dispersed without intersecting each other, and in addition to cooling the steam. Is effective for.

[0011]

According to the present invention, by providing a water chamber extending vertically around the gas cooling section and a plurality of spray nozzles arranged vertically facing the inner surface of the water chamber, Since many spray nozzles are arranged vertically in the chamber, even if the water pressure of the cooling water drops, it is possible to effectively cool the gas by generating a spray from a spray nozzle with a height corresponding to the water pressure. it can. Further, since the water chamber is arranged in the up-down direction such that the space formed by the curved surface along the inner side of the outer periphery of the gas cooling unit and the space formed by the flat surface along the inner partition of the gas cooling unit are arranged in the vertical direction, Can be widely arranged in the vertical direction and sprayed from the spray nozzle in the vertical direction. Also, spray nozzles arranged vertically adjacent to each other on the inner surface of the water chamber can be widely dispersed without crossing if they are mounted with a horizontal mounting pitch shifted by a half pitch, which is effective in cooling steam. . Furthermore, if the spray nozzles arranged so as to face the inner surface of the water chamber are mounted with their mounting pitches shifted in the vertical direction by a half pitch, the sprays are widely dispersed without crossing, which is effective in cooling the steam.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a partial embodiment of a direct contact condenser of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view taken along the arrow III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.

FIG. 5 is a vertical sectional view of a conventional jet type direct contact condenser.

[Explanation of symbols]

 1 Upper Body 2 Lower Body 3 Cooling Water Piping 4 Cooling Moisture Piping 5 Main Nozzle 6 Hot Well 7 Cooling Water Piping 8 Partition 9 Gas Cooling Section 10 Water Chamber 11 Spray Nozzle 12 Gas Collecting Pipe 13 Gas Passing Hole

Claims (4)

[Claims] 1. An upper body for guiding exhaust steam from a turbine,
A lower body coupled under the upper body to inject cooling water to condense the exhaust vapor, and gas cooling that is disposed on the left and right of the lower body to inject cooling water to cool the uncondensed exhaust vapor. And a plurality of spray nozzles arranged vertically facing the inner surface of the water chamber, wherein the water chamber extends vertically around the gas cooling unit. Direct contact type condenser characterized by. 2. The direct contact condenser according to claim 1, wherein the water chamber has a space formed by a curved surface along the inside of the outer periphery of the gas cooling section, and a space formed by a flat surface along the partition wall inside the gas cooling section. A direct contact type condenser characterized in that it is communicated with and arranged vertically. 3. The direct contact condenser according to claim 1, wherein the spray nozzles arranged vertically adjacent to each other on the inner surface of the water chamber are mounted by shifting the horizontal mounting pitch by a half pitch. Direct contact condenser. 4. The direct contact condenser according to claim 1, wherein the spray nozzles arranged so as to face the inner surface of the water chamber are mounted by shifting the mounting pitch in the vertical direction by a half pitch. Type condenser.