KR20060059237A - The cooling method of a thermal power plant by using deep sea water - Google Patents

Abstract

The present invention relates to a method for taking deep sea water and using it as cooling water of a power plant, and more particularly, to a method for taking deep sea water from a seabed and using it as a cooling water in a condenser (4) of a thermal power plant. will be.

To this end, the present invention is to install the water intake pipe (8) on the seabed to take the deep sea water with a low temperature to use the cooling water in the condenser (4) of the thermal power plant to facilitate maintenance and to improve the power generation efficiency It is characterized by the fact that the deep ocean water to be taken in is collected at a depth of 200 m or less.

Deep sea water has a low temperature and low temperature change compared to surface water of sea level, and cleanliness with little marine life exists. Therefore, power generation efficiency is improved and there are no problems caused by shellfish and diatoms. Therefore, it is expected to be widely used in thermal power plants that can easily take in deep sea water.

Deep sea water, thermal power plant, low temperature, cleanliness, power generation efficiency, cooling water

Description

The deep cooling method of a thermal power plant by using deep sea water

FIG. 1 is a process chart of taking deep ocean water and using it as a cooling water in a thermal power plant when the bottom of the sea surface is sand, gravel or bee.

2 is a water intake device of deep sea water when the bottom of the sea surface is sand, gravel, bee

3 is a cross-sectional view of the support pile of the intake pipe from the water surface to the depth of 20 ~ 50m when the bottom of the sea surface is sand, gravel, bee

4 is a side view of the support pile of the intake pipe from the water surface to the depth of 20 ~ 50m when the bottom of the sea surface is sand, gravel, bee

5 is a top view of the support pile of the intake pipe from the water surface to the depth of 20-50m when the bottom of the sea surface is sand, gravel, bee

6 is a water intake device of deep sea water when the bottom of the sea surface is formed of rock

7 is a cross-sectional view of the support anchor of the water intake pipe from the water surface to the depth of 20 to 50m when the bottom of the sea surface is formed of rock;

8 is a side view of the support anchor of the intake pipe from the water surface to the depth of 20 to 50m when the bottom of the sea surface is formed of rock;

9 is a top view of the support anchor of the water intake pipe from the water surface to the depth of 20 to 50 m when the bottom of the sea surface is formed of rock;

Fig. 10 is a view of the installation of a water tank of the intake port

<Explanation of symbols for main parts of drawing>

One; Boiler 2; Steam turbine

3; Generator 4; Avenger (Steam condenser)

5; Condensate feed pump 6; Intake Pump

7; Sump 8; Intake pipe

9; Supporting pile 9-1; Clamp

9-2; Bolt and nut 9-3; Check bar

9-4; Supporting plate 9-5; Supporting lug

10; Supporting anchor 10-1; clamp

10-2; Bolts and nuts 10-3; Anchor supporting plate

10-4; Support plate 10-5; Anchor bolt

10-6; Anchor 10-7; Anchor nut

11; Large number 12; Intake pump room

The present invention relates to a method of using the deep seawater thermal power plant as cooling water, and more particularly, to take up deep seawater of 200m or less in depth and to use the cooling water in the condenser of the vital power plant to cool the occlusion by marine fish and seaweeds ( The present invention relates to a cooling method that can improve power generation efficiency while suppressing clogging as much as possible.

In general, surface water is used for the cooling water used in the steam condenser of the thermal power plant around the coast. In the case of surface water, the temperature changes according to the season, and the water temperature is close to 30 ℃ in summer. As the fall of the shellfish (貝類) and diatoms (硅藻 類) attached there is a problem that causes a blockage phenomenon.

Deep sea water refers to seawater that is at a depth where sunlight does not reach and does not mix with seawater on the surface.Typically, seawater less than 200m is called deep sea water, and occupies about 95% of the seawater existing on the earth. have.

Deep sea water has characteristics such as low temperature stability, cleanliness, eutrophicity, mineral properties, and maturation when compared to surface seawater. It is the same as the content of Table 1.

If you want to take deep ocean water and use it for thermal power plant, drinking water and salt production, sea bath, farm water, etc., you should install the water intake pipe safely by typhoon or tsunami phenomenon. Installation costs should be low without paying.

                        Table 1 Characteristics of deep sea water

  Low temperature stability While the surface water temperature fluctuates greatly with the seasons, deep ocean waters are stable at low temperatures with little fluctuations in the water temperature.    Cleanliness Deep ocean water is deep and difficult to be polluted by terrestrial river water and air, and there are very few chemicals, bacteria, organisms and suspensions.   Eutrophication The deep ocean water is deep in the sunlight and does not have photosynthesis. Compared with surface sea water, it contains a lot of inorganic nutrients such as nitrogen, phosphorus, and silicic acid which are indispensable for the growth of living organisms.   Mineral properties Deep sea water contains essential trace elements and various minerals in a balanced manner, contains few impurities, and is very similar to the human body's mineral balance.    Aging Deep sea water matures over a long period of time under high pressure, and the clusters of water molecules become small groups, resulting in high thermal conductivity with low surface tension.

In the case of Japanese Patent Application Laid-Open No. 11-148312, a deep sea water piping facility is installed at the intake point, a buoy is installed at the intake point, and a buoy is installed at the power plant to fix the surface of the sea surface by anchoring it to the seabed. If it is installed on the ground, it may be damaged by the tsunami due to severe waves or tsunamis. Also, it is installed on the surface of the sea, which may obstruct the ship's route, There is a problem such as high.

In order to solve the above problems, the present invention provides a method that is easy to maintain and use, with cooling water in the condenser of a thermal power plant, by taking deep sea water of 200 m or less at a low water temperature and having excellent cleanliness. It is an object of the invention.

In order to achieve this purpose, the deep sea water intake facility is securely installed with a support pile or a support anchor up to a depth of 30 to 50 m so as not to be damaged by waves or tsunamis. It is characterized in that it is made possible to cool the power generation efficiency and easy to maintain and use as a cooling water.

Deep sea water has characteristics such as low temperature stability, cleanliness, eutrophicity, mineral properties, and maturation characteristics compared to surface seawater. It proposes a cooling method that is easy to maintain and excellent in power generation efficiency using and cleanliness.

The heat exchanger (multiplexer) of the existing thermal power plant using surface seawater as the cooling water has a severe seasonal change and the water temperature rises to 30 ° C in summer.魚 介 類) is attached and there is difficulty in maintenance.

The deep sea water below 200m has a low temperature of 5 ℃ or less (Ulleungdo Hyeonpo 650m deep sea water temperature is 0.2 ℃) and there is little seasonal change, and most of the sun's rays are absorbed by sea water, As the world becomes wider, photosynthesis does not occur, and phytoplankton, bacteria, and organisms that consume nutrients cannot grow, resulting in low concentrations of organic matter that causes water deterioration, contamination by bacteria, and land. B. It is easy to maintain and maintain because it is clean and less likely to be contaminated by chemicals from the atmosphere.

By using the low temperature and clean characteristics of the deep sea water as the cooling water in the thermal power plant condenser 4, the power generation efficiency is increased and the maintenance is easy.

When the deep sea water at low temperature is discharged into the sea after heat exchange, it is predicted that the area of the sea area where temperature change occurs can be reduced. Can also be used.

In addition, the deep sea water, which has been heated by cooling water in thermal power plants, is used for the beverage and salt manufacturing process by microfiltration, ultrafiltration, nanofiltration and reverse osmosis filtration. In this case, the heating operation is not necessary to improve the membrane filtration efficiency, and the heating cost can be reduced even when used in a sea bath.

Considering the matters to be considered in the selection of the place where the deep sea water intake and drainage system is installed,

① It costs less to choose a place where the depth of water is less than 200m from the coast to be installed.

② The place where the flow of algae is severe and the lip currents should be avoided.

③ The area facing the wave should be avoided.

Hereinafter, described in detail by the accompanying drawings as follows.

Thermal power plants use coal and petroleum as fuel to send superheated steam generated by the combustion heat of fuel in a boiler (1) to a steam turbine (2) to cool water in a steam condenser (4). By supplying the condensed steam (Steam) while rotating the generator (Generator) 3 to produce electric power, the condensed water condensed in the condenser (4) is returned to the boiler (1) by the condensate water supply pump (5).

In the case of using superficial seawater for cooling water supplied to the condenser 4, in the summer, when the temperature of the seawater rises to 30 ° C, power generation efficiency decreases. Since the heat exchange efficiency is lowered, there is a problem in that maintenance is required to periodically detach them.

In the present invention, in order to solve the problem when the surface seawater is used as the cooling water in the condenser 4 in the thermal power plant, the low-temperature clean seawater (ocean deep water) of 200 m or less is taken in and used as the cooling water in the condenser 4 to generate power generation efficiency. Maintenance-free cooling method that does not require maintenance due to the attachment of fish and shellfish and diatoms.

In order to use such deep sea water, first, the deep sea water below 200 m should be installed with a safe intake and drainage system in severe waves or tsunamis.

In order to install the deep sea water intake system, the place where the depth of water is less than 200m should be selected near the installation place, so the economic burden is small, the place where the flow of algae is severe, the place where the lantic flow is formed, the waves and Avoid installations that face up front.

If the bottom of the seabed is sand, gravel or bee, the installation of the intake pipe (8) is to support the supporting pile (9) with a check bar (9-3) up to 30-50m 5 The support plate (9-4) is installed on the upper part of the nailed to ˜10m, and the intake pipe (8) on the support plate (9-4) is a clamp (9-1) bolts and nuts (Bolt &nut; 9-2) Tighten up and fix it so that it is not damaged by waves or tsunamis.The pipe is safe from waves and tsunamis from 50m to 200m below the water, so install a water intake pipe (8) on the bottom of the sea. (受 架 臺; 11) is installed, and the inlet of the intake pipe (8) is to be installed more than 20m from the bottom of the sea to prevent the bee deposited on the bottom.

Support pile (4) for supporting the intake pipe (3) is installed in the lower end of the tube is processed in the shape of the top of the backing rod (9-3), the upper part of the support plate (9-4) welded and fixed, the support plate (9-4) has a structure reinforced by a supporting lug (9-5), and the support pile (9) is piled by anti-punching method at 5-10 m underground, and then the water intake pipe (8) is installed on the support plate (9-4) in the upper portion of the support pile (9) and tighten the clamp (9-1) with bolts and nuts (9-2) to fix it firmly.

The check rod 9-3 of the support pile 9 is installed by welding 30 to 40 bones at the bottom of the support pile 9 at an angle of 30 to 60 degrees, and the pipe and the upper support of the support pile 9 are installed. Four support lugs 9-5 are installed at the bottom of the plate 9-4 at right angles and reinforced.

If the bottom of the seabed is rock, the pile can not be installed by the anti-punching method. Therefore, boring the rock from the sea level to a depth of 30 to 50m to install a supporting anchor (10). In addition, a support plate (10-4) in the shape of a U -shape is installed on the anchor supporting plate (10-3) above the support anchor (10), and the water intake pipe (8) on the support plate (10-4) Silver clamp (10-1) is fastened by bolts and nuts (10-2) to be fixed and installed so as not to be damaged by waves or tsunamis, and pipes from 50m to 200m or below are safe from waves and tidal waves A water intake pipe 8 is installed on the top, and a water inlet 11 is installed at the inlet of the intake port, and the inlet of the water intake pipe 8 is 20m from the sea surface so that the bee accumulated in the lower part is not introduced. Install it strangely.

Intake pipe support anchor 10 is installed to the rock by the boring, and the anchor support 10, the upper support plate of ┏┓-shape on the anchor holding plate (10-3) (10-4) for supporting the 8 The anchor nut (10-7) to fix the anchor (10-6), and then on the support plate (10-4), the intake pipe (8) bolts the clamp (10-1) bolts and nuts (10-2) ) To fix it firmly.

The method of collecting deep ocean water is to install the sump (7) below the sea level 3 ~ 5m below the sea level and take water according to the siphon principle, and then use the water intake pump (6) for the condenser (4) of the thermal power plant. ) To be used as cooling water.

As shown in FIG. 2, the intake pipe 8 is buried under the same ground angle as the inclination angle of the sea bottom to the depth of 10-20 m in the subterranean ground, and the intake pipe 8 is buried under the ground 3 to 5 m, and the check rod (30 to 50 m) is checked. Bar; Support pile pile (9-3) attached to the basement 5-10m underground Support plate (9-4) is installed on the top, the intake pipe (8) on the support plate (9-4) Install the clamp 9-1 by bolt and nut 9-2 to fix it so as not to be damaged by waves or tsunamis. Water intake pipe 8 is installed on the sea bottom because it is safe in the water inlet, water inlet 11 is installed at the inlet of the intake port, and the water intake pipe 8 is installed so that the bee deposited in the lower part does not flow in. The inlet is directly piped to the intake pump (6) installed in the intake pump chamber (12) with the intake pipe (8) installed over 20m from the seabed surface. Supplied to the condenser 4 of the power plant is used as cooling water.

At this time, the bottom water level of the intake pump chamber 12 is constructed to be 5 m or less than the sea level, and the intake pump 6 is installed 3 to 5 m lower than the sea level so that the gaseous components dissolved in the deep sea water are gasified while decompressed It is to prevent the trouble (Trouble) by the phenomenon.

If the ground floor is a rock, underground construction is difficult, so the pump chamber 12 of the intake pump 6 is located at a sea level where the water level can be lowered from the pump chamber 12 away from the coast to an area that is not nourished by waves or tidal waves. 6, the intake pipe 8 is directly piped to the intake pump 6 provided in the intake pump chamber 12, and the deep sea water is supplied to the condenser 4 of the thermal power plant and used as cooling water.

At this time, the water intake pump 6 uses a pump having a Net Positive Suction Head Required (NPSHr) of 5 mH ₂ O or more to vaporize the gaseous components dissolved in the deep sea water while decompressing the gas into the cavitation phenomenon. It is to prevent the trouble (Trouble) caused by.

The material of the water intake pump 6 is made of titanium, flame resistant stainless steel, bronze alloy, etc., which are highly flame resistant.

The material of the intake pipe 8 is flexible and flameproof plastic pipe is used. The pipe diameter is determined in consideration of the intake capacity and the pressure loss according to the length of the pipe.

The intake pipe 8 uses a pipe reinforced with a plurality of multi-filament yarns and metal wires to the pipe main body made of plastic.

And the material of the support pile 9, the support anchor 10 and other accessories uses a strong flame-resistant titanium, flame-resistant stainless steel, bronze alloy (Bronze) alloy.

As described above, deep sea water is used as a cooling water in a thermal power plant, and the heated water is used for drinking water, mineral and salt manufacturing processes, fish and shellfish farms, sea baths, and the remaining effluent is discharged into the surface waters. Because of the high concentration of, marine algae can breed rapidly and cause red tide, so they should be in situ at their original location (seabed below 200 m).

At this time, the installation method and the material of the drain pipe is the same as the intake pipe (8).

As described above, the present invention facilitates deep ocean water because the efficiency of power generation is improved when the deep sea water of clean low temperature is taken and used as cooling water in a thermal power plant, so that maintenance is not necessary due to the attachment of shellfish and diatoms. It is expected to be widely used in thermal power plants in regions that can be easily taken in.

Claims (3)

30 ~ 50m of water intake pipe 8, supporting pile 9 with a check bar 9-3 attached to the basement 5 ~ 10m, supporting plate 9-4 On the support plate 9-4, the water intake pipe 8 is installed by fastening the clamp 9-1 with bolts and nuts 9-2 so as not to be damaged by waves or tidal waves. Since the pipe is safe from waves and tsunamis from 50m to 200m below water, install a water intake pipe 8 on the bottom of the sea, install a water basin 11 at the inlet of the intake port, In order to prevent the inflow of the intake pipe 8, the intake pipe 7 is installed underground from the intake pipe 8 installed at least 20 m above the sea surface so that the highest water level is 3 to 5 m below the sea level. Deep sea water taken in accordance with the principle (Siphon) is supplied to the condenser (4) of the thermal power plant using a water intake pump (6) to use as cooling water. The water intake pipe 8 is embedded in the underground water up to a depth of 10 to 20 m at an inclined angle equal to the inclination angle of the sea floor, and the water intake pipe 8 is filled in the intake pump room. A method of supplying deep sea water taken by direct piping to a water intake pump (6) provided in (12) as a water intake pump (6) to a condenser (4) of a thermal power plant and using it as cooling water. According to claim 1, If the bottom of the seabed is a rock bed Boring the rock from the sea level to 30 to 50m depth to install a support anchor (Supporting anchor 10), the upper part of the support anchor (10) In the anchor supporting plate (10-3) is installed a U -shaped support plate (10-4) on the top, the intake pipe (8) on the support plate (10-4) bolts the clamp (10-1) And fixed by tightening with nut (10-2) so as not to be damaged by waves or tsunami, and the intake pipe (8) is installed on the sea bottom because the pipe is safe from waves or tsunami from the depth of 50m to the depth of 200m or less. Water intake pipe 8 is installed at the inlet of the intake, and the intake pipe 8 is installed at least 20m from the sea surface so that the bee accumulated in the lower part does not flow in. Pipe is directly piped to the intake pump 6 installed in the intake pump chamber 12 to A method using a cooling water supplied to the condenser 4 of the power plant.

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