JP4133355B2 - Steam power generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power generation apparatus using steam that generates power with a steam turbine by using surplus steam supplied to various steam using apparatuses, surplus steam generated by a cogeneration system, and the like.
[0002]
[Prior art]
[Patent Document 1]
In this method, an exhaust pressure adjusting valve is provided on the inlet side of the steam turbine, and the steam generated by the steam generator is decompressed by the steam turbine and supplied to the process. A power generation device using a steam turbine that converts power into electric power is disclosed.
[Patent Document 2]
This is a thermomagnetic engine that generates a rotational force by a temperature difference and a magnetic force. A cylindrical rotor made of a temperature-sensitive magnetic material and a magnetic pole in the circumferential direction of the outer peripheral surface of the cylindrical rotor. And a heating / cooling region for heating and cooling a part of the cylindrical rotor.
[0003]
[Problems to be solved by the invention]
The conventional power generator has a problem that the power generation efficiency of the steam turbine becomes a low value. This is because since the turbine outlet side is connected to the process, the heat drop from the inlet to the outlet of the turbine is small, and the output per unit steam flow is small.
[0004]
In view of such circumstances, an object of the present invention is to obtain a power generation apparatus using steam that can improve the power generation efficiency of a steam turbine by ensuring a large heat drop in the turbine and increasing the turbine output. It is.
[0005]
[Means for Solving the Problems]
The means of the present invention devised to solve the above-described problem is that a steam supply pipe that supplies steam from a steam source to the inlet side of the steam turbine is connected, and the steam supplied from the steam supply pipe to the steam turbine is used. In the power generation, a vacuum suction means is connected to the outlet side of the steam turbine, and the vacuum suction means maintains a predetermined vacuum state between the steam turbine and the vacuum suction means, and the vacuum suction means has a temperature difference and a magnetic force. A thermomagnetic engine that generates rotational force is connected to the generator, and a generator that generates electric power with the rotational force of the thermomagnetic engine is attached.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
By maintaining a predetermined vacuum state between the steam turbine and the vacuum suction means by the vacuum suction means, a large heat drop is obtained, and the turbine output is increased by making the best use of the thermal energy possessed by the steam. And the power generation efficiency of the steam turbine can be improved.
[0007]
By providing the thermomagnetic engine and the generator in the vacuum suction means, it is possible to rotate the thermomagnetic engine using the heat of the condensate discharged from the vacuum suction means and generate electric power with the generator.
[0008]
【Example】
In FIG. 1, a steam turbine 2 whose inlet side is connected to the steam supply pipe 1, a generator 3 connected to the output shaft of the steam turbine 2, a steam condenser 4 connected to the outlet side of the steam turbine 2, The ejector type vacuum pump 5 as vacuum suction means installed below the steam condenser 4 and the thermomagnetic engine 17 connected to the ejector type vacuum pump 5 constitute a steam power generation device.
[0009]
The steam supply pipe 1 connected to a steam source (not shown) is connected to the steam turbine 2 via a gas-liquid separator 7 with a built-in steam trap 6. The gas-liquid separator 7 swirls the incoming fluid and separates the liquid with a large mass from the gas with a small mass by centrifugal force. On the other hand, the steam trap 6 has a function of discharging only the condensate to the outside without discharging the steam from the inflowing mixed fluid of the steam and the condensate.
[0010]
In the gas-liquid separator 7, steam-condensed condensate condensed with steam and gas are separated into steam and the separated steam flows down to the steam turbine 2 side, while the separated condensate is separated. Is removed from the steam trap 6 outside the system. In this embodiment, the separated condensate is sucked into the ejector type vacuum pump 5 through the pipe line 8.
A steam condenser 4 is connected to the outlet side of the steam turbine 2. The steam condenser 4 incorporates therein a plurality of heat exchange tubes communicating with the cooling water supply pipe 9 and the cooling water discharge pipe 10, and converts the thermal energy expanded and held in the steam turbine 2 into velocity energy. Heat is exchanged with the generated steam to make condensate.
[0012]
The lower part of the vapor condenser 4 is connected to the liquid ejector 11 of the ejector type vacuum pump 5. The ejector type vacuum pump 5 includes the liquid ejector 11, a tank 12, a circulation pump 13, and a circulation path 14 that communicates these. A cooling water supply pipe 15 for supplying cooling water is connected to the upper portion of the tank 12. Further, a part of the circulation path 14 is branched and the surplus water discharge pipe 16 is attached.
[0013]
A thermomagnetic engine 17 is attached to the surplus water discharge pipe 16. The thermomagnetic engine 17 generates a rotational force by utilizing a temperature difference between the high temperature of the condensate flowing in from the discharge pipe 16 and the normal temperature in the atmosphere. The generated rotational force is transmitted to the generator 18 to be electrically Produce. Condensate deprived of heat by the thermomagnetic engine 17 is discharged from the discharge pipe 19 to the outside.
[0014]
The ejector type vacuum pump 5 causes the water in the tank 12 to flow down to the liquid ejector 11 by the circulation pump 13, thereby generating suction force in the liquid ejector 11 and sucking the condensed water condensed in the vapor condenser 4. The inside of the steam condenser 4 and thus the inside of the steam turbine 2 is maintained in a predetermined vacuum state.
[0015]
The ejector type vacuum pump 5 generates a suction force according to the temperature of the liquid flowing down in the ejector 11. That is, it generates a suction force equal to the saturation pressure with respect to the liquid temperature flowing down in the ejector 11. By setting the liquid temperature to 100 ° C. or lower, the vacuum pressure becomes atmospheric pressure or lower. For example, the liquid temperature is set to 50 ° C. Then, the generated vacuum pressure is about 95 mmHg.
[0016]
It is possible to arbitrarily set the suction force of the ejector 11 by supplying cooling water from the cooling water supply pipe 15 to the tank 12 of the ejector type vacuum pump 5 and setting the liquid temperature in the tank 12 to a predetermined value. Therefore, the heat drop in the steam turbine 2 can also be set arbitrarily.
[0017]
The steam supply pipe 1 is supplied with surplus steam generated by a cogeneration system or the like. Then, only the steam from which the condensate mixed from the steam supply pipe 1 via the gas-liquid separator 7 is removed is supplied to the steam turbine 2, and the connected generator 3 is rotated to generate power.
[0018]
The steam that has expanded and worked in the steam turbine 2 flows down to the steam condenser 4, exchanges heat with the cooling water, condenses into condensed water, is sucked into the ejector 11 of the ejector type vacuum pump 5, and is stored in the tank 12. It reaches. Circulating the ejector type vacuum pump 5 from the tank 12, surplus mixed liquid of the condensate and cooling water reaches the thermomagnetic engine 17 from the surplus water discharge pipe 16 and rotates the generator 18 to generate electricity.
[0019]
【The invention's effect】
As described above, according to the present invention, a large heat drop can be obtained by maintaining the inside of the steam turbine in a predetermined vacuum state by the ejector type vacuum pump, and the turbine output can be maximized by utilizing the thermal energy possessed by the steam. The power generation efficiency of the steam turbine can be improved.
[0020]
Further, according to the present invention, by connecting the thermomagnetic engine and the generator to the ejector type vacuum pump, it is possible to generate power using the heat of the condensate discharged from the ejector type vacuum pump, and Power generation efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a steam power generator according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steam supply pipe 2 Steam turbine 3 Generator 4 Steam condenser 5 Ejector type vacuum pump 6 Steam trap 7 Gas-liquid separator 11 Liquid ejector 12 Tank 13 Circulation pump 17 Thermomagnetic engine 18 Generator

Claims (1)

Connect a steam supply pipe that supplies steam from the steam source to the inlet side of the steam turbine, and connect the vacuum suction means to the outlet side of the steam turbine when generating electricity using steam supplied from the steam supply pipe to the steam turbine. The vacuum suction means maintains a predetermined vacuum state between the steam turbine and the vacuum suction means, and a thermomagnetic engine that generates a rotational force by a temperature difference and a magnetic force is connected to the vacuum suction means. A steam generator comprising a generator for generating electric power by the rotational force of a magnetic engine.

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