JP4904562B2 - Hydroelectric power generation equipment using cooling discharge water - Google Patents

Description

  The present invention relates to a hydroelectric power generation apparatus using cooling discharge water of a power plant.

  The electric power we use was a hydroelectric power generation system that uses a drop from an artificial lake that built a dam in the gorge and blocked the flow of the river. Steam power generation that generates electricity by turning the turbine generator using this steam has come to be performed. Now, in addition to fossil fuel, nuclear power generation using a heat source by nuclear reaction is also performed as a heat source for generating steam. Steam power plants that use these thermal power and nuclear power that generate large-scale power generation require a large amount of cooling water in the condenser for condensing and collecting the steam that rotates the turbine generator into water. Seaside steam power plants usually use seawater as cooling water for condensate.

  In general, thermal power plants and nuclear power plants that use steam as described above use a large amount of cooling water, so these power plants are often constructed on flat land close to the sea. All the water used for cooling is pumped up and used, and the cooling water used in the condenser is discharged again into the seawater as cooling discharge water from the power plant.

  FIG. 2 is an explanatory diagram of a water supply / drainage system of a thermal power plant (T) and a nuclear power plant (N), and generates power by turning the turbine generator (A) with steam generated by thermal power or nuclear power. Steam (V) for turbine is constantly circulated by a pump (PI) through a condenser (B), and seawater (C) pumped from the sea by a pump (P2) is supplied to the condenser (B). Used as cooling water. Then, the cooling seawater cooled by the steam (V) by the condenser (B) is discharged to the sea surface as cooled discharge water (hot drainage) (Q) having a certain temperature.

As cooling effluent water, thermal energy as heat drainage of the condenser is recovered by a low boiling point catalyst, and this energy is reused for power generation (for example, see Patent Document 1), or cooling effluent water (warm water). A method is also known in which a waste water) is pumped up, a heat pump is used, and this is heated and stored to be transported to a facility outside the power plant that requires hot water (see Patent Document 2).
However, both are those utilizing the thermal energy of the cooling water discharged is large amount discharged from thermal power plants and nuclear power plants, is intended to use water mosquito energy quantity of cooled effluent directly to hydroelectric power none Therefore, an effective use method of the cooling effluent water for the electric energy has not been put into practical use yet, and it was abandoned to the sea as mere cooling drainage.
Japanese Patent Laid-Open No. 2002-122006 JP 2005-257173 A

  Therefore, the present invention is an effective hydroelectric generator that can effectively reuse cooling effluent discharged from a steam power plant such as a thermal power plant or a nuclear power plant as a water source for a hydroelectric generator and can sufficiently cope with environmental problems. It is for the purpose of provision.

Means to solve the problem

The present invention is a hydroelectric generator that reuses cooling effluent discharged from a steam power plant such as a thermal power plant or a nuclear power plant as a water source for a hydroelectric generator. In particular, nuclear power plants and large-capacity thermal power plants are operated continuously as the base load of generated power, so the cooling effluent discharged from these steam power plants can maintain a certain amount of drainage throughout the season. If water is used for hydroelectric power generation, predetermined power can be stably supplied without being affected by the climate and weather.
In addition, the location for installing the water turbine for power generation can be freely set according to the environment, so it can be installed directly in the middle of the drainage route regardless of the installation location of the power plant, or the dam or water pressure can be It is also possible to generate electricity by providing a pipe and installing a water wheel there. The form of the dam and the location of the water turbine for power generation can be applied in various forms considering efficiency.

  Further, the present invention is for cooling from the steam power plant. The discharge water is temporarily stored in a reservoir near the coast, and hydroelectric power generation is performed using a drop with the sea level. It is possible to obtain a stable power output from the stored water pods without being directly affected by the power generation capacity.

Then, the cooled discharge water once stored in the reservoir is led to the hydro turbine of the hydroelectric generator in the drainage channel provided below the sea level to generate power. In addition to the hydroelectric power generation caused by the difference between the water level of the reservoir and the sea level, Thus, a tide-linked hydroelectric generator that can add a tidal power generation effect due to changes in sea level due to seawater tidal fluctuation (tidal difference).
In this way, in addition to the difference between the water level of the reservoir and the surface of the water that is the discharge surface, a drop that occurs at low tide is inevitably added. It is possible to obtain a hydroelectric tide interlocking type device that obtains generated power.
Also, by discharging below the sea surface, the generation of bubbles is suppressed, the coastline is not polluted, and there is no generation of steam or fog from the sea surface, so it is said to be a preferable power generator for environmental problems. Can do. In addition, as is clear from FIG. 1, the center position of the power generation water turbine is always provided at a level higher than the high tide sea level Lb. Therefore, even if the water turbine breaks down even at high tide, water supply from the reservoir Repair is possible because the water turbine is not completely submerged in the seawater without providing a shutter for preventing the backflow of seawater simply by stopping.

  And in this invention, by providing a rubber dam that adjusts the water level of the reservoir in conjunction with the water level of the sea surface on the dam of the reservoir, it depends on the height of the sea surface due to seawater tidal and the amount of cooling river discharge water discharged from the power plant The balance of the water surface height of the reservoir can be adjusted to stabilize the generated power. This rubber dam is an adjustment weir made of a rubber tube, and adjusts the height by inflating the tube by introducing air. This makes it possible to control the water level and amount of water in the reservoir.

The invention's effect

This invention reduces the influence of climate and weather by reusing the cooling effluent discharged from thermal power plants and nuclear power plants that have been unnecessarily discharged as mere cooling wastewater as a water source for hydroelectric power generation. In addition to providing stable power supply even during drought periods without being received, the power generation equipment used for hydroelectric power generation can be used as it is by installing the drain outlet of the power generation turbine below the low tide sea level. Combined with the effect of reusing the cooling effluent from the discharged power plant as a source of hydroelectric power generation, a tide-linked hydroelectric power generation device having an excellent synergistic effect combined with the tide power generation effect is obtained. It can be done.
Further, as is clear from FIG. 1, the center position of the power generation water turbine is always provided at a height equal to or higher than the high tide sea level Lb. Therefore, even if the water turbine breaks down even at high tide, water supply from the reservoir By simply stopping the operation, the water turbine will not be completely submerged in the seawater without a seawater backflow prevention shutter.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram of a hydroelectric power generation device in which a tidal power generation effect is further imparted to a hydroelectric power generation device that uses cooling discharge water from a steam power plant.
3 is a reservoir, and 5 is a hydroelectric generator of the present invention, which has power generation facilities such as a horizontal axis propeller turbine 6 and a hydroelectric generator 7 that are used for hydroelectric power generation with a relatively small head and a large flow rate. It arrange | positions in the water channel connected to the drain port 9 opened in the seawater from the reservoir 3 through the water pressure line 4 and the drain line 8. The drain port 9 is set lower than the low tide sea level as shown in the figure. Therefore , the cooling effluent 2 discharged from a thermal power plant such as a thermal power plant or a nuclear power plant (not shown) and temporarily stored in the reservoir 3 is rotated by the hydraulic turbine 7 of the hydroelectric generator 5 from the hydraulic line 4 to the hydroelectric generator 7. To generate electric power and discharged from the drain port 9 of the drain pipe 8 below the sea surface.

La indicates the reservoir water level, Lb indicates the high tide sea level of seawater, and Lc indicates the low tide sea level.
Therefore, the drop Ha between the water level La of the reservoir and the high tide sea level Lb is a criterion for the minimum power generation of the hydroelectric generator 5.

Since the power generated by the hydroelectric generator 5 based on this embodiment is generated by the drop Ha at high tide, and the tide difference power generation by the drop Hb is performed at low tide, the tidal phenomenon of seawater occurs twice a day. In this embodiment, in the time zone from the high tide period to the low tide period, the head increases from Ha to Hb and the power generation tends to increase, and in the time period from the low tide period to the high tide period, the head drops from Hb to Ha. The power generation is decreasing and the power generation is decreasing.
However, since the power generation equivalent to the drop Ha is always secured, the tidal power generation effect based on the tidal phenomenon twice a day is added to the power generation based on the potential energy of the water based on the drop between the reservoir and the sea surface. Will be.

  In addition, in the power generation apparatus to which such a tidal power generation effect is imparted, in order to maintain the optimal and stable supply of power generation, the height of the dam of the reservoir 3 can be freely adjusted as necessary. It is preferable to provide a rubber dam. This rubber dam adjusts the balance between the height of the sea surface due to seawater tidal flow and the surface height of the reservoir according to the amount of cooling water discharged from the steam power plant. An adjustment weir consisting of a rubber tube provided for high-efficiency operation of renewable energy. The height is adjusted by inflating the tube by introducing air, and the water level and amount of water in the reservoir water are adjusted. It can be controlled.

As described above, according to the present invention, the cooling effluent discharged from a thermal power plant such as a thermal power plant or a nuclear power plant that was conventionally discharged as mere wastewater is reused as a water source for hydroelectric power generation. By using this, stable power can be supplied without being affected by the climate and weather, and the drain of the water turbine for power generation of the hydroelectric power plant is below the sea level, preferably at the sea level at low tide. By installing below the water level, the power generation equipment used for hydroelectric power generation can be used as it is, the tide level difference due to seawater tidal can be used effectively, and further, the generation of bubbles is suppressed and the coastline is not polluted, Since there is no generation of steam or fog from the sea surface, the present invention can be said to be a tidal-linked hydroelectric power generation apparatus that is preferable for environmental problems. In addition, since the center position of the power generation water turbine is set higher than the high tide sea level Lb, even if the water turbine breaks down at high tide, it is not necessary to provide a shutter for preventing the reverse flow of seawater simply by stopping the water supply from the reservoir. However, since the water turbine is not completely submerged in seawater, repair work from the top surface of the water wheel is possible, and there is no need to install a water gate or shutter for preventing backflow of seawater, and it has high economic effect on construction costs It is.

It is explanatory drawing of the hydroelectric generator which provided the tidal power generation effect of this invention. It is explanatory drawing of the water supply and drainage system of a thermal power plant and a nuclear power plant.

2 ... Cooled effluent 3 ... Reservoir 4 ... Water pressure line 6 ... Water wheel 7 ... Hydroelectric generator 8 ... Water distribution line 9 ... Drainage port La ... Reservoir water level Lb ... High tide sea level Lc ... Low tide sea level

Claims (1)

A reservoir for temporarily storing cooling discharge water discharged from a thermal power plant such as a thermal power plant or a nuclear power plant, a drain port for draining the water of the reservoir into seawater through a hydraulic conduit and a drain conduit, A power generation apparatus having a horizontal axis propeller turbine for hydropower generation provided in a water distribution pipe, wherein the center position of the turbine is set higher than a water level of a high tide sea level, and the drain outlet is a water level of a low tide sea level. A hydroelectric generator using cooling effluent water provided at the following height.

Images