WO2023022300A1

WO2023022300A1 - Disc-type turbine steam power plant

Info

Publication number: WO2023022300A1
Application number: PCT/KR2021/016904
Authority: WO
Inventors: 유성훈
Original assignee: 유성훈
Priority date: 2021-08-20
Filing date: 2021-11-17
Publication date: 2023-02-23
Also published as: KR20230027999A

Abstract

The content disclosed in the present description relates to a disc-type steam power plant and, more specifically, to a disc-type turbine steam power plant for generating electricity by rotating a plurality of stacked disks by a viscous force of a fluid. An embodiment of the disclosed content suggests a disk-type turbine steam power plant for generating electricity by a viscous force of a fluid, the disk-type turbine steam power plant comprising: a circulation pipe through which a fluid flows; a boiler installed at the circulation pipe and heating the fluid to phase-change the fluid into steam; a disk-type turbine installed at the circulation pipe and having a disk provided therein, the disk being rotationally driven by a viscous force of the steam; and a pump installed at the circulation pipe and circulating a liquid fluid coming out of the disk-type turbine to the boiler.

Description

Disc Turbine Steam Power Plant

Disclosed herein relates to a disk-type steam power plant, and more particularly, to a disk-type turbine steam power plant that generates power by rotating a plurality of stacked disks with the viscous force of a fluid.

Unless otherwise indicated herein, material described in this section is not prior art to the claims in this application, and it is not admitted that material described in this section is prior art.

In general, a steam power plant such as a thermal power plant or a nuclear power plant is operated while repeating a steam power cycle process. That is, a heat source such as a boiler or a nuclear reactor generates steam, and the generated high-temperature, high-pressure steam collides with turbine blades. The steam colliding with the blades rotates the turbine, and the high-temperature and high-pressure steam colliding with the turbine becomes water-containing steam, which is cooled by the condenser and becomes liquid water again. In this way, the steam power cycle can be operated while repeating one cycle.

In addition, the condenser may form low-pressure steam by liquefying the steam passing through the turbine. The low-pressure steam passing through the turbine corresponds to a lower pressure than the incoming steam entering the turbine. The pressure difference between the low-pressure steam passing through the turbine and the relatively high-pressure inlet steam increases the speed of the inlet steam and increases the rotational speed of the turbine blades, thereby increasing power generation efficiency. However, as the low pressure is created, the inlet steam rapidly adiabatically expands and the temperature drops and can be liquefied. In particular, in the low-pressure region on the rear side of the blade, the vapor expands more adiabatically and becomes more liquefied, and the blade may be destroyed due to the occurrence of cavitation. Therefore, the condenser can condense water vapor so that liquefaction does not occur at the rear surface of the turbine blade. Therefore, it is difficult to increase power generation efficiency under the constraint of preventing the occurrence of a cavitation phenomenon in a general prime mover generating power while steam collides with the blades of a turbine.

In this way, the condenser must be included as an essential component to complete the steam power cycle and suppress cavitation. That is, a steam power plant operating in a steam power cycle must exchange heat with a low-temperature heat sink as well as a high-temperature heat source. In the case of a steam power plant, heat exchange is performed between a boiler corresponding to a heat source and a condenser corresponding to a hot needle. During this heat exchange process, the fluid used in the steam power plant undergoes a phase change from a liquid to a vapor and then returns to its initial liquid state, repeating the process.

In the case of a typical steam power plant, only a portion of the energy in the superheated steam region possessed by the high-temperature and high-pressure steam flowing into the turbine is used to rotate the turbine, resulting in a power generation efficiency of about 40 to 60%. Accordingly, in order to increase the power generation efficiency of a steam power plant, a lot of research is being conducted on technology development that can rotate a turbine with most of the energy possessed by high-temperature and high-pressure steam.

It is intended to provide a disk-type turbine steam prime power plant that can generate power even without a condenser and maximize power generation efficiency by using a disk-type turbine so that most of the energy held by steam is used to rotate the turbine. .

In addition, it is not limited to the technical problems as described above, and it is obvious that other technical problems may be derived from the following description.

Disclosed is a disk-type turbine steam power plant generating power using viscous force of fluid, a circulation pipe through which the fluid flows, a boiler installed in the circulation pipe and heating the fluid to change the phase to steam, and the circulation pipe A disc-type turbine installed on the inside of which is provided with a disc driven by the viscous force of the steam, and a pump installed in the circulation pipe and circulating the liquid fluid from the disc-type turbine to the boiler. A type turbine steam power plant is presented as an example.

On the other hand, the disk-type turbine has an inner space for accommodating the disk, an inlet through which steam from the boiler is introduced, and a casing in which a confluence outlet through which the liquid fluid is joined and discharged to the outside is formed on the center portion, and A rotatable rotary shaft passing through the center of the casing, a plurality of stacked disks having a through hole through which the rotary shaft passes, and a fluid flow port through which the liquid fluid passes is formed adjacent to the through hole, and the rotary shaft It may include a spacer that penetrates and is interposed between the stacked disks to maintain the stacked disks at regular intervals.

Meanwhile, side cutting parts may be formed on both sides of an end surface of the rotating shaft.

Meanwhile, the fluid flow ports may be formed at regular intervals around the through hole.

On the other hand, it may include a bending prevention portion that penetrates the rotational shaft and is closely coupled to the plurality of stacked disks at both ends of the rotational shaft.

The disk-shaped steam power plant according to the disclosed contents can increase power generation efficiency by rotating a plurality of stacked disks with the viscous force of steam by using a disk-shaped turbine.

1 is a schematic diagram of a disk-type turbine steam power plant according to one embodiment of the present disclosure;

Figure 2 is an exploded perspective view showing a disk-type turbine according to an embodiment of the disclosure.

3 is an enlarged view of a cross section of a rotating shaft according to an embodiment of the present disclosure;

4 is a side view of a disk-shaped turbine according to one embodiment of the present disclosure;

5 is a perspective view of a spacer according to one embodiment of the disclosed subject matter;

Figure 6 is a coupling state diagram of a spacer according to an embodiment of the disclosure.

Figure 7 is a perspective view of a bending prevention unit according to an embodiment of the disclosed subject matter.

Figure 8 is a combined state diagram of the bending prevention unit according to an embodiment of the disclosure.

* Description of code

1: Disc-type turbine steam power plant

100: circulation piping

200: boiler

300: disk-type turbine

310: casing

312: inner space

314: inlet

316 confluence outlet

320: axis of rotation

330: disk

332: through hole

334: fluid flow port

340: spacer

341: spacer body

342: spacer arm

350: bending prevention unit

400: pump

Hereinafter, with reference to the accompanying drawings, look at the configuration and operational effects of the preferred embodiment. For reference, in the following drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, like reference numerals refer to like components throughout the specification, and reference numerals for like components in individual drawings will be omitted.

Referring to FIG. 1 , a disk-type turbine steam power plant 1 according to an embodiment of the present disclosure includes a circulation pipe 100, a boiler 200, a disk-type turbine 300, and a pump 400.

The circulation pipe 100 allows the fluid used in the disk-type turbine steam power plant 1 to circulate. During the steam power cycle, the fluid passes through a boiler 200, a disc-type turbine 300, and a pump 400 to be described later in the circulation pipe 100, and repeats the process of phase change into liquid or steam. Fluid from the boiler 200 becomes steam and flows to the disk-type turbine 300, and liquid fluid from the disk-type turbine 300 flows to the boiler 200. The flow of this fluid is made in the circulation pipe 100. The fluid may change in temperature and pressure during the completion of the steam power cycle. While the fluid circulates, the temperature or pressure of the fluid changes, and the circulation pipe 100 continuously receives pressure from the fluid. In particular, when the fluid has a high pressure, the fluid may flow out of the circulation pipe 100 due to damage to the circulation pipe 100 . Therefore, the circulation pipe 100 is preferably made of a material that can withstand high pressure or a material that is corrosion resistant to the fluid used.

The boiler 200 may be installed in the circulation pipe 100 to heat the fluid and change the phase to steam. The boiler 200 requires a fuel source to change the phase of a fluid into steam, and diesel or natural gas is generally used. In the disc-type turbine steam power plant 1 of the disclosure, a fluid of 100 to 200° C., which corresponds to a relatively low temperature in the power plant, may be used. Therefore, the boiler 200 can rotate the disk-type turbine 300 even when wood, lignite, briquettes, pellets, combustible waste, and the like are used as a fuel source.

The disk-shaped turbine 300 may be rotated by the viscous force of steam. The disk-type turbine 300 rotates according to the boundary layer effect caused by the inflowing steam. Since the fluid has a viscous property and flows, the velocity of the fluid becomes zero at the contact surface of the object in contact with the fluid. As the fluid moves away from the object, the velocity of the fluid gradually increases, forming a velocity gradient and maintaining a constant velocity. The region where the velocity gradient occurs due to the viscous effect of the fluid is called the boundary layer. That is, the boundary layer refers to a layer of fluid near the surface of an object on which the viscous effect of the fluid affects. The viscous effect of the fluid in the boundary layer can generate a frictional force between the fluid and the surface of the object in contact, and this frictional force is called viscous frictional force. This viscous frictional force may act as a traction force that pulls the disk-shaped turbine 300 to rotate, thereby rotating the disk-shaped turbine 300 .

The pump 400 may circulate the liquid fluid from the disk-type turbine 300 to the boiler 200. The pump 400 applies pressure to the liquid fluid to allow the fluid to flow within the circulation pipe 100 .

The circulation pipe 100, the boiler 200, and the pump 400 constituting the disk-type turbine steam power plant 1 corresponding to an embodiment of the above disclosure have been described, but these configurations are Since it corresponds to the generally used and known prior art, a detailed description thereof will be omitted.

Referring to FIG. 2 , the disk-shaped turbine 300 may include a casing 310, a rotational shaft 320, a plurality of stacked disks 330, and a spacer 340.

The casing 310 may have an inner space 312 accommodating the disk 330 . In addition, the casing 310 may have an inlet 314 through which steam from the boiler 200 is introduced, and a confluence outlet 316 through which liquid fluid is joined and discharged to the outside may be formed on the central portion. Vapor introduced into the inner space 312 through the inlet 314 of the casing 310 spirals inward toward the center of the plurality of stacked disks 330, and may be phase-changed into a liquid fluid. The phase-changed liquid fluid may pass through the confluence outlet 316 and flow into the pump 400 through the circulation pipe 100 .

The rotating shaft 320 may pass through the center of the casing 310 and rotate as the stacked disks 330 are driven to rotate. The rotating shaft 320 may be connected to a generator (not shown) generating a change in the electromagnetic field, and supply mechanical energy required to change the electromagnetic field. Referring to FIG. 3 , side cutting portions may be formed on both sides of the cross section of the rotating shaft 320 . When coupling and fixing with a plurality of stacked disks 330 using the rotating shaft 320 having a circular cross section, a coupling and fixing operation such as forming a precise key is required. However, even when the side cutting parts are formed on both sides of the cross section of the rotating shaft 320, a joint fixing operation such as welding is required, but slippage with respect to the rotating shaft 320 is difficult due to the characteristics of the cross-sectional shape of the rotating shaft 320 itself, which is not circular. may not occur. Therefore, it is possible to obtain an effect of increasing the coupling and fixing force between the rotary shaft 320 and the plurality of stacked disks 330 even with relatively inaccurate coupling and fixing operations such as keys.

Referring back to FIG. 2 , the plurality of stacked disks 330 have a through hole 332 through which the rotating shaft 320 passes, and a fluid flow hole 334 through which steam passes is adjacent to the through hole 332 . can be formed. The plurality of stacked disks 330 may be stacked while maintaining a predetermined interval between the disks 330 . A predetermined interval between the plurality of stacked disks 330 can maximize power generation efficiency by the aforementioned boundary layer effect. The steam is subjected to centripetal force by the rotation of the plurality of stacked disks 330 and may flow toward the center of the plurality of stacked disks 330 while forming a spiral inward. The disk 330 may have a disk shape maintaining a constant thickness as a whole, but may have a convex shape with a thick central portion. In addition, the rotational speed of the disk 330 may increase as the thickness of the disc 330 decreases. However, considering the load that is added according to the rotation of the disk 330, the disk 330 is preferably made of a material having tensile strength and corrosion resistance.

The through hole 332 allows the rotating shaft 320 to pass through the disk 330, and may be formed in a shape corresponding to the cross-sectional shape of the rotating shaft 320 on the center of the plurality of stacked disks 330. there is. The steam introduced into the turbine becomes a phase-changed liquid fluid, and the fluid flow port 334 serves as a passage through which the liquid fluid is discharged to the outside of the plurality of stacked disks 330 . More specifically, the latent heat and sensible heat possessed by the steam are used to rotate the plurality of stacked disks 330, and the steam becomes a liquid fluid and is collected at the center of the plurality of stacked disks 330. This liquid fluid may be discharged to the outside of the plurality of stacked disks 330 through the fluid flow port 334 . The fluid flow ports 334 may be formed at regular intervals around the through hole 332 . It is preferable that two or more fluid flow ports 334 are formed for smooth discharge of the liquid fluid.

Referring to FIG. 4 , the spacer 340 may be interposed between the plurality of stacked disks 330 . The spacer 340 may maintain the stacked disks 330 at regular intervals. In order to prevent deformation due to bending of the disk 330 and to maintain a certain interval between the plurality of stacked disks 330, it is preferable that one spacer 340 is interposed between the plurality of stacked disks 330 one by one. . The spacer 340 may be inserted through the rotation shaft 320 at the center of the disk 330 . That is, the spacer 340 is interposed between the stacked disks 330 by the rotating shaft 320, thereby maintaining the stacked disks 330 at regular intervals.

Referring to FIGS. 5 and 6 , the spacer 340 may be formed of a spacer body 341 and a plurality of spacer arms 342 . The central part of the spacer body 341 is penetrated by the rotating shaft 320, and parts of the spacer body 341 and the spacer arm 342 are cut so that steam from the fluid flow port 334 of the disk 330 can pass through. It can be. The spacer 340 may be manufactured in a shape that does not obstruct the flow of liquid fluid passing through the fluid flow port 334 .

Referring to FIGS. 7 and 8 , the bending prevention unit 350 may pass through the rotation shaft 320 and be tightly coupled to the plurality of stacked disks 330 at both ends of the rotation shaft 350 . The bending prevention unit 350 may be a flat plate that passes through the rotating shaft 320 and is tightly coupled to the disk 330 . The bending prevention unit 350 may tightly couple the disks 330 and the spacer 340 by pressing the plurality of disks 330 and the spacer 340 into close contact. In addition, the bending prevention unit 350 may prevent the disk 330 and the spacer 340 from bending by maintaining a tight coupling state between the disk 330 and the spacer 340 .

Hereinafter, the operation process of the disk-type turbine steam prime power station 1 according to an embodiment of the above disclosure will be described.

Liquid fluid is introduced into the boiler 200, and the introduced liquid fluid may receive heat from the boiler 200 and change its phase into steam. Steam is introduced into the inlet 314 of the casing 310 of the disk-type turbine 300 while flowing along the circulation pipe 100, and spirals inward toward the center of the plurality of stacked disks 330 by the boundary layer effect. , and can flow. Steam flowing while forming a spiral can rotate the plurality of stacked disks 330 at high speed. Most of the energy possessed by the steam is converted into rotational motion energy of the plurality of stacked discs 330, and the steam is phase-changed to become a liquid fluid. The liquid fluid is collected in the center of the plurality of stacked disks 330 and may pass through the fluid flow port 334 . The liquid fluid passing through the fluid flow hole 334 may be discharged to the outside of the disk-type turbine 300 through the confluence outlet 316 of the casing 310 . The discharged liquid fluid may be circulated back to the boiler 200 by the pump 400 . This operation process can be repeated forming one steam power cycle.

The disk-type turbine steam prime power station 1 according to the disclosed contents of the present invention has a disk-type turbine 300 configured to rotate a plurality of stacked disks 330 with the viscous force of steam, thereby increasing power generation efficiency. .

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and represent all the technical ideas of the present invention. Since it is not, it should be understood that there may be various equivalents and modifications that can replace them at the time of this application. Therefore, the embodiments described above should be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and their All changes or modified forms derived from equivalent concepts should be construed as being included in the scope of the present invention.

According to the disclosed invention, power generation efficiency can be increased by rotating a plurality of stacked disks with the viscous force of steam using a disk-shaped turbine.

Claims

In a disk-type turbine steam power plant that generates power using the viscous force of a fluid,

a circulation pipe through which the fluid flows;

a boiler installed in the circulation pipe and heating the fluid to change its phase into steam;

a disk-type turbine installed in the circulation pipe and provided with a disk driven to rotate by the viscous force of the steam; and

A disk-type turbine steam power plant including a pump installed in the circulation pipe and circulating the liquid fluid from the disk-type turbine to the boiler.
According to claim 1,

The disk-shaped turbine,

a casing having an inner space accommodating the disk, an inlet through which steam from the boiler flows in, and a junction outlet through which the liquid fluid joins and discharges to the outside is formed on the center portion;

a rotatable shaft penetrating the center of the casing;

a plurality of stacked disks having a through hole through which the rotating shaft passes, and a fluid flow port through which the liquid fluid passes is formed adjacent to the through hole; and

A disk-type turbine steam comprising a spacer passing through the rotating shaft and being interposed between the stacked disks to maintain the stacked disks at regular intervals.
According to claim 2,

A disk-type turbine steam power plant in which side cutting parts are formed on both sides of the cross section of the rotating shaft.
According to claim 2,

The fluid flow ports are formed at regular intervals around the through hole.
According to claim 2,

A disk-type turbine steam power plant including a bending prevention unit that penetrates the rotation shaft and is tightly coupled to the plurality of stacked disks at both ends of the rotation shaft.