KR20100027293A - Power generation system - Google Patents

Abstract

PURPOSE: A power generation system is provided to prevent the enlargement of vacuum atmosphere by indirectly controlling the degree of vacuum of the steam condenser, thus improving the generation efficiency and stability. CONSTITUTION: A power generation system comprises a steam header(110) which distributes steam, a steam turbine(120) which is connected through a first pipe to the steam header and generates power using the steam provided from the steam header, a generator(130) which is connected to the rotary shaft of the steam turbine and produces electricity with the rotation of the rotary shaft, a steam condenser(140) which is connected through a second pipe to the steam turbine and condenses the steam which is exhausted from the steam turbine, and a suction unit(150) which has a vacuum atmosphere and sucks the steam and air inside the steam condenser at the same time by being connected through a third pipe to the steam condenser.

Description

Power Generation System

The present invention relates to a power generation system, and more particularly, in a power generation system using steam, having a suction part in a vacuum atmosphere for simultaneously sucking the plurality of air generated in the condenser and the air in the condenser, thereby adjusting the vacuum degree of the condenser, The present invention relates to a power generation system that can further improve stability.

Recently, environmental pollution and global warming problems caused by the indiscriminate use of fossil fuels have already reached a serious level, and as fossil fuels, which are used as absolute energy sources, are gradually depleted, development of eco-friendly new renewable energy to replace them Many human and material resources are being invested. For example, research on various energies such as hydrogen energy, solar power, tidal power, wave power, and wind power is being actively conducted around the world, and some of them are commercially available. However, the share of these energies in total energy use is still small, which means that the above-mentioned energies are significantly less energy efficient than fossil fuels, and also require large installations and enormous capital to produce such energy. Because.

On the other hand, in addition to the trend of developing alternative energy as mentioned above, recently, energy conversion technology for converting energy simply discarded after use, such as wastewater and waste heat, into usable energy has been attracting attention in order to reduce environmental pollution and save energy. .

1 is a schematic configuration diagram of a power generation system that generates electricity by using steam generated from combustion, an incinerator, a boiler, and the like as part of energy conversion as described above.

As shown in FIG. 1, a conventional power generation system generates power using a steam header 1 for controlling a pressure and a supply amount of steam generated from a boiler or an incinerator, and steam supplied from the steam header 1. The steam turbine 2, the generator 3 is connected to the rotary shaft of the steam turbine 2 to produce electricity by the rotation of the rotary shaft, and the steam discharged from the steam turbine 2 to condense and reduce to a plurality The condenser 4 is included.

In the power generation system having the above configuration, the degree of vacuum of the condenser 4 greatly affects the efficiency of the steam turbine 2. That is, the higher the vacuum degree of the condenser 4, the larger the thermal drop of steam, and thus, the steam turbine 2 may receive more steam pressure, thereby improving the efficiency of the steam turbine 2. At this time, the vacuum of the condenser 4 is the steam discharged from the steam turbine 2 and the seawater introduced through the seawater tube 5 connected to the condenser 4 indirect contact with the steam during the process of heat transfer condensed and pluralized For example, most of the space previously occupied by steam can be vacuumed due to a sharp decrease in gas density. However, these vacuums vary greatly depending on the amount of steam, the amount of seawater, other atmospheric and seawater temperatures. Therefore, in order to compensate for the unstable vacuum degree of the condenser 4 which changes according to the surrounding environment, the vacuum pump 6 was installed in the condenser 4 conventionally, and artificially formed high vacuum. The vacuum pump 6 sucks air in the condenser 4 to maintain the condenser 4 in a vacuum state, and improves the efficiency of the steam turbine 2 by making the condenser 4 more vacuum. It was.

Here, when low vacuum is formed in the condenser 4 during the heat transfer process of steam and seawater, it is possible to raise the vacuum state to a high level through the vacuum pump 6. However, when a high vacuum is formed in the condenser 4 during the heat transfer process of steam and seawater, not only the condenser 4 but also the steam turbine 2 are provided by a vacuum pump 6 positioned close to the steam turbine 2. Vacuum is applied until the steam condensation starts from the steam turbine (2). However, the condensed water causes erosion and cracking of the blades of the steam turbine 2 to cause problems such as malfunction of the steam turbine 2 and shortening of life, thereby degrading the reliability and stability of the overall power generation system. In addition, of course, the cost of repairing equipment is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. In the power generation system using steam, the power generation efficiency and It is an object to provide a power generation system that can further improve stability.

In addition, another object of the present invention is to provide a power generation system that can ensure the reliability and stability by preventing the condensation and cracking of the steam from the blade of the steam turbine to erosion and cracking.

In addition, another object of the present invention is to provide a power generation system capable of preventing the loss of energy by converting the discarded energy into useful energy by producing electricity using waste heat.

The power generation system of the present invention for achieving the above object, the steam header for distributing steam; A steam turbine connected to the steam header through a first pipe and generating power by using the steam supplied from the steam header; A generator connected to the rotary shaft of the steam turbine to generate electricity by the rotation of the rotary shaft; A plurality of condensers connected to the steam turbine and a second pipe, condensed and reduced by the condensation and reduction of the steam discharged from the steam turbine, and a plurality of condensers connected to the condenser and a third pipe; And a suction part in a vacuum atmosphere that simultaneously sucks air.

Here, the plurality of pumps may be provided with a plurality of pumps for ejecting the plurality of the plurality of pipes.

In addition, the suction unit may be connected to a vacuum pump for controlling the vacuum atmosphere of the suction unit through a fourth pipe.

In addition, the suction unit may be connected to a plurality of storage tanks for storing the plurality discharged from the suction unit through a fifth pipe.

As described above, the present invention is to improve the efficiency of the steam turbine by adjusting the vacuum degree of the condenser in the power generation system using the steam, provided with a suction portion of the vacuum atmosphere for sucking the condensate and the air generated in the condenser at the same time You can.

In addition, according to the present invention, by preventing the steam condensation and erosion and cracks in the steam turbine, it is possible to further ensure the reliability and stability of the power generation system.

In addition, according to the present invention, it is possible to convert the energy discarded after use into usable energy, thereby preventing the loss of energy.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic configuration diagram of a power generation system using steam according to a preferred embodiment of the present invention.

As shown in FIG. 2, the power generation system 100 according to the preferred embodiment of the present invention includes a steam header 110, a steam turbine 120, a generator 130, a condenser 140, and a suction unit ( 150). In addition, the power generation system 100 further includes a vacuum pump 160 and a plurality of storage tanks 170. In this case, the steam header 110 and the steam turbine 120 are connected to each other through the first pipe 125, the steam turbine 120 and the condenser 140 is connected through the second pipe 145, The condenser 140 and the suction part 150 are connected to each other through the third pipe 155. In addition, the suction unit 150 and the vacuum pump 160 are connected to each other through a fourth pipe 165, the suction unit 150 and the plurality of storage tanks 170 through each other through a fifth pipe (175). Connected.

The steam header 110 is a distribution device that collects the steam made from the heat source and sends it to the place where it is needed. Here, the heat source means any device or engine capable of making steam by boiling water such as combustion of fossil fuel, waste heat generated from a boiler, an incinerator, a blast furnace, etc., which defines any one heat source for making steam in the present invention. It is not. In the present invention, when the steam header 110 to supply steam to the steam turbine 120, to control the pressure and the supply amount of steam for stable driving of the power generation system 100 is to supply the steam. In this case, the steam ejected from the steam header 110 is introduced into the steam turbine 120 through the first pipe 125. On the other hand, since the steam header 110 accommodates steam at a high temperature and high pressure, the steam header 110 may be formed of a stainless steel-based material having excellent heat resistance and corrosion resistance.

The steam turbine 120 is connected to the steam header 110 through the first pipe (125). The steam turbine 120 is one of the representative energy converter for converting the steam heat energy into mechanical energy, the nozzle (not shown) or a fixed blade (not shown) for the high temperature and high pressure steam emitted from the steam header 110 The rotary shaft 121 is rotated by impulse action or counter action by hitting a turbine blade (not shown) that rotates a high-speed steam stream blown out and expanded. Here, a pair of the nozzle (not shown) and the turbine blade (not shown) are referred to as the stage of the steam turbine 120. The stage of the steam turbine 120 is to drive the turbine blades (not shown) only by the impulse force and drive by using both the impulse and reaction force, the former is called the impulse stage, the latter is the reaction stage. And a turbine consisting of only the impulse stage is called an impulse turbine, a turbine consisting only of the reaction stage is called a reaction turbine. The steam turbine 120 may be configured by arranging several of these stages side by side, or may be composed of only one stage. For example, when waste heat of a small and medium-sized incinerator is used as a heat source, since the amount of generated steam is not very high, a single stage micro steam turbine 120 may be used.

The generator 130 is configured to be connected to the rotary shaft 121 of the steam turbine 120. In addition, the generator 130 produces electricity by the rotation of the rotary shaft 121. The generator 130 is dependent on the rotational speed of the rotating shaft 121, the electricity output is changed as the rotational speed is added or decreased. Therefore, the power generation system 100 according to the preferred embodiment of the present invention controls the degree of vacuum of the condenser 140 to increase the efficiency of the steam turbine 120 and at the same time stabilize the power generation system 100 in the generator 130. The electricity produced can be made available continuously and in greater quantities.

The condenser 140 is connected to the steam turbine 120 through a second pipe 145. The condenser 140 powers the steam turbine 120 to condense by introducing steam discharged therein. The condenser 140 is a closed container, and takes the heat of evaporation of the steam flowing by the supplied cooling water to reduce the steam to make a plurality. The reason why a plurality of steams are generated in the power generation system 100 using steam is that power consumption may be further reduced in the liquid state than in the gas state. The condenser 140 is divided into a mixed condenser in which steam and cooling water are in direct contact, and a surface condenser allowing heat exchange through a heat transfer surface. 2 illustrates a surface condenser in which steam and cooling water are heat-exchanged. The condenser 140 shown in FIG. 2 is a surface condenser, a body 141 in the form of a sealed container, a seawater tube 142 through which seawater circulates, and a hot water reservoir for temporarily storing the reduced plurality. 143 is formed. In addition, a plurality of pumps 144 for discharging the temporarily stored plurality may be installed at the lower portion of the hot water storage tank 143.

When steam flowing from the steam turbine 120 enters the body 141, seawater used as cooling water flows into the seawater tube 142. At this time, the steam flowing from the steam turbine 120 and the seawater introduced through the seawater tube 142 is indirectly contacted to cause heat transfer. During this process, the steam is condensed and reduced to make a plurality, Most of the space occupied by steam is rapidly reduced in gas density and becomes vacuum. In addition, the reduced plurality is stored in the hot water reservoir 143 and then discharged to the third pipe 155 by the plurality of pumps (144).

Here, the higher the vacuum degree of the condenser 140, the larger the thermal drop of steam, and thus the steam turbine 120 receives more steam pressure, thereby improving the efficiency of the steam turbine 120. However, in the related art, a vacuum pump (6 in FIG. 1) is installed at one side of the condenser (4 in FIG. 1) to increase the efficiency of the steam turbine (2 in FIG. 1) by vacuuming the vacuum degree naturally formed in the process of plural steaming. By the vacuum pump (6 in FIG. 1) installed in a position close to the steam turbine (2 in FIG. 1), but not only a condenser (4 in FIG. 1), but also a steam turbine (2 in FIG. 1). ), The steam began to condense from the steam turbine (2 of FIG. 1) and caused various mechanical problems in driving the steam turbine (2 of FIG. 1) by the condensed water. Therefore, the power generation system 100 of the present invention is provided with a device for artificially forming a vacuum as far as possible from the steam turbine 120, in order to solve the above problems. That is, in the power generation system 100 according to the present invention, the suction of the vacuum atmosphere connected to the other side of the condenser 140 corresponding to one side of the condenser 140 connected to the steam turbine 120 through the third pipe 155. The unit 150 is provided.

Like the condenser 140, the suction unit 150 is formed in a sealed container. The suction unit 150 itself serves as a storage tank. While the condenser 140 naturally forms a vacuum atmosphere by heat exchange between steam and seawater, the suction part 150 artificially creates a vacuum atmosphere. To this end, the suction unit 150 is connected to the vacuum pump 160 through the fourth pipe 165. By the pumping action of the vacuum pump 160, the air inside the suction unit 150 is sucked and discharged to the vacuum pump 160. In the power generation system 100 according to the present invention, the suction unit 150 in a vacuum atmosphere rapidly improves a plurality of discharge speeds stored in the hot water reservoir 143 of the condenser 140, and discharges all of the plurality. After the air remaining in the body 141 of the condenser 140 is also sucked into the suction unit 150 serves to high vacuum the condenser 140. Here, in the related art, the vacuum pump (6 in FIG. 1) affected the steam turbine (2 in FIG. 1), but in the power generation system 100 of the present invention, the vacuum pump 160 is used to determine the degree of vacuum of the condenser 140. Since it is not controlled directly, but indirectly through the absorber 150, it is possible to prevent the vacuum from expanding to the steam turbine 120. That is, the suction unit 150 improves the efficiency of the steam turbine 120 by increasing the degree of vacuum of the condenser 140 as well as contributes to the stability of the steam turbine 120.

Meanwhile, the plurality sucked into the suction unit 150 moves to the plurality of storage tanks 170 connected through the suction suction unit 150 and the fifth pipe 175 when the suction unit 150 is released from the vacuum. The plurality of stored in the plurality of storage tanks 170 is re-supplied as a heat source, heated to become steam, this steam may be supplied to the steam turbine 120 again.

As described above, the present invention includes a suction unit 150 in a vacuum atmosphere for simultaneously sucking the plurality of air generated in the condenser 140 and the air in the condenser 140. The suction unit 150 may indirectly control the degree of vacuum of the condenser 140 to increase the degree of vacuum of the condenser 140 and prevent expansion of the vacuum atmosphere. As a result, it is possible not only to improve the efficiency of the steam turbine 120, but also to drive the steam turbine 120 more stably, thereby improving the power generation efficiency of the entire power generation system 100. And the present invention can utilize the waste heat of the incinerator as a heat source for generating steam. That is, the present invention can convert the energy discarded after use into usable energy, thereby preventing the loss of energy.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

1 is a schematic configuration diagram of a power generation system using a conventional steam.

2 is a schematic configuration diagram of a power generation system using steam according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1OO: Power Generation System 110: Steam Header

120: steam turbine 130: generator

140: condenser 150: suction

160: vacuum pump 170: multiple storage tank

Claims (6)

A steam header for distributing steam; A steam turbine connected to the steam header through a first pipe and generating power by using the steam supplied from the steam header; A generator connected to the rotary shaft of the steam turbine to generate electricity by the rotation of the rotary shaft; A condenser connected to the steam turbine through a second pipe and condensing and reducing the steam flowing out from the steam turbine into a plurality; And A suction part of a vacuum atmosphere connected to the condenser and a third pipe and suctioning the plurality of air and the air stored in the condenser at the same time; Power generation system comprising a. The method of claim 1, The power generation system, characterized in that the plurality of pumps are provided with a plurality of pumps for ejecting the plurality to the third pipe. The method according to claim 1 or 2, The suction unit is connected to a vacuum pump for controlling the vacuum atmosphere through a fourth pipe. The method of claim 1, The suction unit is connected to a plurality of storage tank for storing the plurality of discharged from the suction unit through a fifth pipe. The method of claim 2, The suction unit is connected to a plurality of storage tank for storing the plurality of discharged from the suction unit through a fifth pipe. The method of claim 3, wherein The suction unit is connected to a plurality of storage tank for storing the plurality of discharged from the suction unit through a fifth pipe.

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