KR20170025509A - Generating apparatus using fluidzed bed boiler - Google Patents

Abstract

The present invention discloses a generating apparatus using a fluidized bed boiler. The disclosed fluidized bed boiler includes: a heat exchanger installed in fluidized bed boiler, and heating a working fluid with a layer material; a turbine connected to the heat exchanger, and generating rotary power by use of expansion of the working fluid heated by the heat exchanger; a generator connected to the turbine, and generating power by use of the rotary power of the turbine; and a compressor connected to the turbine, compressing the working fluid discharged from the turbine, and then transmitting the compressed working fluid to the heat exchanger. Accordingly, the present invention may use a layer material of a fluidized bed boiler as a heat source, increase generation efficiency by heating supercritical carbon dioxide, and control output.

Description

[0001] GENERATING APPARATUS USING FLUIDZED BED BOILER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation apparatus using a fluidized bed boiler, and more particularly, to a power generation apparatus using a fluidized bed boiler capable of performing power generation using a layer material of a circulating fluidized bed boiler.

The power generation technology using supercritical carbon dioxide is a high-efficiency miniaturized power generation technology that enables the modularization of the apparatus by using the supercritical carbon dioxide as the working fluid to improve the power generation efficiency using the existing steam or gas.

Supercritical carbon dioxide has a gas-state viscosity at the density of the liquid state, minimizing the power consumption required for miniaturization, compression and circulation of the device, and the critical point is much lower than the critical point of water (water: 373.95 ° C, 217.7 atm ↔ carbon dioxide: 31.04 ℃, 72.8 atm) It is easy to handle the working fluid.

Supercritical carbon dioxide (CO 2) generation technology is variously configured according to the type of heat source and its characteristics, and a recompression cycle capable of controlling the power generation capacity is in the spotlight.

In addition, the power generation using supercritical carbon dioxide can be made smaller than the conventional power generation system in addition to the power generation efficiency improvement portion. Especially, the special gas turbine, the PCHE internal heat exchanger and the precooler are designed as specialized devices by utilizing the characteristics of supercritical carbon dioxide, and their volume is significantly smaller than that of existing power generation systems. Can be solved.

However, when heat exchange units are installed in existing power generation and heat supply facilities, the heat exchange coefficient between supercritical carbon dioxide and exhaust gas is lower than that of water / steam and flue gas heat exchange, so the design and modification of heat exchangers are required. The amount of heat absorbed by the working fluid fluctuates. Therefore, there is a need for improvement.

BACKGROUND OF THE INVENTION [0002] The background art of the present invention is disclosed in Patent Registration No. 10-1412693 (entitled " Supercritical Brayton Cycle System with Two Reverse Rotor Generators, "

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the problems described above, and it is an object of the present invention to provide a power generation apparatus using a fluidized bed boiler as a heat source, heating supercritical carbon dioxide to increase power generation efficiency, The purpose is to do.

A power generation apparatus using a fluidized-bed boiler according to the present invention includes: a heat exchange unit provided in a fluidized-bed boiler for heating a working fluid with a layer material; A turbine section connected to the heat exchange section and generating a rotational force by using the expansion of the working fluid heated by the heat exchange section; A power unit connected to the turbine unit and generating power using the rotational force of the turbine unit; And a compression unit connected to the turbine unit and compressing the working fluid discharged from the turbine unit and delivering the compressed working fluid to the heat exchange unit.

In the present invention, the working fluid is supercritical carbon dioxide.

In the present invention, the heat exchanging unit may include: a layer material accommodating portion in which the layer material is accommodated; a supply pipe through which the layer material is supplied; and a discharge pipe through which the layer material is discharged; A heat exchange pipe which is connected to the compression unit and the turbine unit at both ends thereof and transfers the working fluid supplied from the compression unit to the turbine unit and is accommodated in the layer material storage unit and heated by the layer material; And a layer material height adjuster which is in communication with the layer material accommodating portion and the discharge tube and adjusts the position or amount of the layer material discharged through the discharge tube to adjust a height of the layer material accommodated in the layer material accommodating portion; And a control unit.

In the present invention, the heat exchanging unit is provided in the bubbling fluidized bed heat exchanger of the fluidized bed boiler.

In the present invention, the heat exchange pipe may include an inner tube having both ends connected to the compression unit and the turbine unit, and the working fluid is moved inward; And an outer tube which surrounds the inner tube and in which steam is moved between the inner tube and the inner tube.

In the present invention, the inner tube or the outer tube is formed with a plurality of projecting fins protruding to increase heat transfer efficiency with the working fluid or steam.

In the present invention, the layer material height adjusting unit may include a plurality of height adjusting units which communicate the inner side of the layer material receiving unit and the discharge pipe, and have different heights; And a fluidizing air supply unit provided in the height adjusting unit and selectively supplying fluidized air to the height adjusting unit to discharge the layered material through the height adjusting unit.

In the present invention, the height adjusting unit may include: a layer material inlet which is in communication with the layer material receiving unit and into which the layer material is introduced from the layer material receiving unit; An air inflow portion provided at a lower end of the layer material inflow portion and fluidically connected to the fluidized air supply portion to supply fluidized air to the layer material inflow portion; And an adjustable discharge portion extending upward from the layer material inflow portion and communicating with the discharge pipe to guide movement of the layer material.

In the present invention, the fluidized-air supply unit may include a compressed-air storage unit for storing compressed air; A fluid connection pipe connecting the compressed air storage portion and the height adjustment portion to guide the movement of the fluidized air and to control the movement of the fluidized air by the control valve; And a blowing unit for supplying a fluid to the compressed air storage unit.

The power generation apparatus using the fluidized bed boiler according to the present invention can reduce the size of the heat exchange unit by heating the working fluid by using the layer material having a relatively large heat transfer coefficient of the fluidized bed boiler.

The present invention also relates to a method for controlling the height of a layer material contained in a layer material accommodating portion by adjusting the height of the layer material contained in the layer material accommodating portion so as to control the contact area between the heat exchanging pipe and the layer material, And the amount of power generation using supercritical carbon dioxide can be controlled.

In addition, the present invention can control the amount of power generation using supercritical carbon dioxide independently of operation of a fluidized bed boiler or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a state where a heat exchange unit is mounted in a bubbling fluidized bed heat exchanger of a fluidized bed boiler in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.
Fig. 2 is a view showing A in Fig.
FIG. 3 is a view illustrating a state where a heat exchange unit in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention is installed in a bubbling fluidized bed heat exchanger provided below a group room of a fluidized-bed boiler.
FIG. 4 is a view illustrating a state in which a heat exchange unit in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention is installed in a bubble fluidized bed heat exchanger provided separately from a rack room.
5 is a side cross-sectional view of a heat exchanger according to an embodiment of the present invention.
6 is a view showing the operation of the layer material height adjusting unit according to an embodiment of the present invention.
7 is a front view of a heat exchanger according to an embodiment of the present invention.
8 is a cross-sectional view of a heat exchange pipe in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.
9 is a view showing a state in which a layer material is moved through a discharge pipe in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention.
10 is a view illustrating a state in which a layer material is moved through a top layer material height adjuster in a power generator using a fluidized bed boiler according to an embodiment of the present invention.
11 is a view illustrating a state in which a layer material is moved through an intermediate layer material height adjusting unit in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.
12 is a view showing a state in which a layer material is moved through a lowermost layer material height adjuster in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention.
13 is a graph showing a relationship between a required heat transfer area and an output in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.
FIG. 14 is a graph showing the circulation amount of the layer material according to the fluidized air flow rate in the power generation apparatus using the fluidized-bed boiler according to an embodiment of the present invention.
15 is a flowchart illustrating a process of controlling the amount of power generation using supercritical carbon dioxide in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.

Hereinafter, an embodiment of a power generation apparatus using a fluidized-bed boiler according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a view showing a state where a heat exchange unit is mounted in a bubbling fluidized bed heat exchanger of a fluidized bed boiler in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention, and FIG.

1 and 2, a power generation apparatus 1 using a fluidized bed boiler according to an embodiment of the present invention includes a heat exchange unit 100, a turbine unit 200, a power generation unit 300, and a compression unit 400 , The working fluid is heated by using the layer material (M) in the fluidized bed boiler (10) and is generated by using the thermal energy of the working fluid.

In this embodiment, the working fluid is exemplified by supercritical carbon dioxide. Supercritical carbon dioxide refers to carbon dioxide in a state corresponding to a pressure and temperature range above a critical condition (pressure (72.8 atm), temperature (31.04 ° C)), and carbon dioxide has intermediate properties between gas and liquid.

The power generation apparatus 1 using the fluidized bed boiler according to the present embodiment uses supercritical carbon dioxide as a working fluid and the temperature and pressure of the low-pressure portion of the working fluid are higher than 31.04 ° C and 72.8 atm. State is maintained. Therefore, since the working fluid according to the present embodiment has the carbon dioxide density of the liquid state and the gaseous carbon dioxide viscosity, it is possible to compress the working fluid by using a small compression work and to increase the bar generation efficiency with a small flow resistance .

FIG. 3 is a view showing a state where a heat exchange unit in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention is installed in a bubbling fluidized bed heat exchanger provided below a group room of a fluidized-bed boiler, and FIG. In which the heat exchanger is installed in a bubble fluidized bed heat exchanger provided separately from the rack room.

Referring to FIGS. 1 to 4, the heat exchange unit 100 is provided in the fluidized bed boiler 10 and heats the working fluid through heat exchange with the layer material M contained therein. That is, in the present embodiment, the heat exchanging unit 100 is a high-temperature (approximately 300 to 400 W / m ² K) layer material M (which is contained in the bubbling fluidized bed heat exchanger 11 of the fluidized bed boiler 10) ) (Sand, coal, etc.) is used to heat the working fluid.

Therefore, in the present embodiment, the power generation apparatus 1 using the fluidized bed boiler can remarkably reduce the size of the heat exchange unit 100, which is a constitution for heating the working fluid.

When the heat exchanging part 100 is mounted on the bubbling fluidized bed heat exchanger 11, the heat transfer coefficient of the case mounted on the upper side of the 200 MW class fluidized bed boiler 10 is increased.

Specifically, the top cycle uses the same amount of coal (domestic anthracite) and combustion air of the BMCR load condition. The output of the power plant using supercritical carbon dioxide is 20 MW (10% of the total output) The top cycle (circulating fluidized bed boiler) uses the in-house program and the bottom cycle (supercritical carbon dioxide generator) uses the Axcycle program when the inlet temperature is 500 ° C and the inlet of the compression unit and the output pressure are 20 MPa and 7.7 MPa. The resultant values are as follows.

Heat exchange position Heat transfer coefficient (W / m ² K) Heat transfer area (m ² ) Heat exchanger bundle volume (m ³ ) Back pass 67.40 2988.7 188.1 Bubble fluidized bed heat exchanger 374.65 537.7 9.9

As shown in Table 1, when the heat exchanging unit 100 is installed in the bubbling fluidized bed heat exchanger 11, the volume of the heat exchanging unit 100 can be reduced to about 20 times as compared with the case where the heat exchanging unit 100 is installed in the back pass 14.

Table 2 shows the changes in efficiency and power generation when a supercritical carbon dioxide power plant is applied to a 200 MW commercial fluidized bed boiler.

Plant construction Plant Efficiency (%) Power generation (MW) 200 MW Fluidized Bed Power Plant 37.28 200 20 MW supercritical carbon dioxide power generation + 200 MW fluidized bed power plant 38.24 205.2

It can be seen from Table 2 that when the compressor inlet / outlet pressure of supercritical carbon dioxide is set to 20 MPa and 7.7 MPa, the overall plant power generation efficiency is increased by about 1% and the power generation by the same coal is increased by about 5%.

FIG. 5 is a side cross-sectional view of a heat exchanger according to an embodiment of the present invention, FIG. 6 is a view showing the operation of a layer material height adjuster according to an embodiment of the present invention, Fig. 5 is a front view of the heat exchanger according to the first embodiment.

Referring to FIGS. 5 to 7, the heat exchange unit 100 is illustrated in the configuration of the fluidized-bed boiler 10 to heat the working fluid, so that power generation using supercritical carbon dioxide can be performed without additional configuration . In this embodiment, the heat exchange unit 100 includes a layer material receiving unit 110, a heat exchange pipe 130, and a layer material height regulating unit 150.

The layer material accommodating portion 110 is connected to a supply pipe 111 through which the layer material M is supplied and a discharge pipe 113 through which the layer material M is discharged and a layer material M supplied from the supply pipe 111, As shown in Fig. In this embodiment, the refractory material may be applied to the inner surface of the layer material receiving portion 110 to prevent the deterioration of the layer material receiving portion 110 due to the hot layer material M captured by the cyclone or the like.

The heat exchange pipe 130 is connected to the compressing unit 400 and the turbine unit 200 at both ends to transmit the working fluid supplied from the compressing unit 400 to the turbine unit 200, Is heated by a layer material (M)

In this embodiment, the heat exchange pipe 130 is formed in a hollow tube shape in which the working fluid moves inward to guide the movement of the working fluid, and may be varied in zigzag shape or the like in order to increase the contact area with the layer material M. Lt; / RTI >

In this embodiment, the heat exchange pipe 130 is connected to the compression unit 400 and the turbine unit 200 at both ends thereof, and transmits the working fluid compressed by the compression unit 400 to the turbine unit 200. A portion connected to the compression unit 400 extends to enter the lower side of the layer material accommodating unit 110 and extends upward in a zigzag shape and extends from the upper side of the layer material accommodating unit 110 to the layer material accommodating unit 110 And is connected to the turbine portion 200 to transfer the heated working fluid.

The heat transfer amount from the layer material M to the heat exchange pipe 130 in this embodiment can be calculated from the following equation.

Here, Q _exchanger : the heat transfer amount of the heat exchanger

U: integrated heat transfer coefficient (W / m ² K)

A: Heat transfer area (m ² )

ΔT: Temperature difference (K) (temperature difference between layer material and working fluid)

h _i : CO 2 heat transfer coefficient (W / m ² K) in the heat exchange pipe

h _o : Heat exchange coefficient of heat transfer pipe outer layer material (W / m ² K)

Nu _D : Nusselt number in the heat exchange pipe (-)

k: thermal conductivity (W / mK)

D _i : Heat exchange pipe inner diameter (m)

D _o ??: Heat exchange pipe outer diameter (m)

ε: Material porosity (-)

ρ _s , ρ _g , μ _g : solid particle density, gas density, gas viscosity

Re _D ??: Number of fluid Reynolds in heat exchange pipe (-)

Pr: Prandtl number (-)

m · CO ₂ : CO ₂ flow rate in the tube (kg / s)

That is, the heat transfer amount of the heat exchanging part 100 is proportional to the temperature difference and the heat transfer area A, and can be expressed by the following equation (2).

The heat exchange unit 100 controls the heat transfer amount of the heat exchange unit 100 by adjusting the heat transfer area, that is, the contact area between the layer material M and the heat exchange pipe 130, Supercritical carbon dioxide can be used to regulate the output. That is, even when there is no change in the output of the fluidized bed boiler 10, the amount of heat generated by supercritical carbon dioxide can be adjusted by controlling the amount of heat transferred to the working fluid by the heat exchanging unit 100, Can be improved.

In this embodiment, the heat exchange pipe 130 is formed in a double pipe shape including an inner pipe 131 and an outer pipe 133 surrounding the inner pipe 131 so as to be spaced apart from each other. Supercritical carbon dioxide is moved to the inner tube 131 and steam flows between the outer tube 133 and the inner tube 131.

Accordingly, in the present embodiment, when power generation is not performed using supercritical carbon dioxide, the power generation apparatus 1 using the fluidized bed boiler discharges the heat of the heat exchange pipe 130 by using steam to overheat the heat exchange pipe 130 And the temperature unbalance of the layer material M can be prevented.

A plurality of projecting pins 135 may be formed on the inner tube 131 or the outer tube 133 to improve heat transfer efficiency between the heat exchange pipe 130 and the working fluid or steam.

The layer material height adjuster 150 is in communication with the layer material accommodating portion 110 and the discharge tube 113 and adjusts the position or amount of the layer material M discharged from the layer material accommodating portion 110, Thereby adjusting the height of the layer material M contained in the portion 110. In this embodiment, the layer material height adjuster 150 includes a height adjuster 151 and a fluidized air supplier 155.

The height adjusting portion 151 communicates the inside of the layer material receiving portion 110 and the discharge pipe 113, and a plurality of the height adjusting portions 151 are provided with different positions. In this embodiment, the height regulating portion 151 includes a layer material inlet 152, an air inlet 153, and a regulating outlet 154.

The layer material inlet 152 is in communication with the layer material receiver 110 and the layer material M is introduced from the layer material receiver 110. The air inlet 153 is provided at the lower end of the layer material inlet 152 and is fluidly connected to the fluidized air supply 155 to allow the fluidized air to be supplied to the layer material inlet 152.

The controlled discharge unit 154 is formed to extend upward from the layer material inlet 152 and communicate with the discharge tube 113 so that the layer material M fluidized by the fluidized air moves to the discharge tube 113 for discharge do.

Thus, when fluidized air of a predetermined amount and speed is supplied through the air inflow portion 153 in a state where the layer material M is introduced into the layer material inflow portion 152, the layer material M is fluidized, And then discharged to the discharge pipe 113 through the discharge pipe 154.

As a result, the layer material height adjuster 150 is sealed by the layer material M acting as a solid when no fluidized air is supplied, while using the principle that the layer material M is moved when fluidized air is supplied It works.

FIG. 9 is a view showing a state in which a layer material is moved through a discharge pipe in a power generation apparatus using a fluidized-bed boiler according to an embodiment of the present invention, and FIG. 10 is a cross- And the layer material is moved through the uppermost layer material height adjuster.

11 is a view illustrating a state in which a layer material is moved through an intermediate layer material height adjusting unit in a power generating apparatus using a fluidized bed boiler according to an embodiment of the present invention. FIG. 3 is a view showing a state in which a layer material is moved through a lowermost layer material height adjusting portion in a power generator using a boiler. FIG.

9 to 12, in this embodiment, the layer material height adjuster 150 adjusts the amount, speed, and the like at which the fluidized air is supplied to the layer material M accommodated in the layer material inflow portion 152, By controlling the degree to which the layer material M of the receiving portion 110 is transferred to the discharge tube 113 through the layer material inlet 152 and the regulated outlet 154, (M).

13 is a graph showing a relationship between a required heat transfer area and an output in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention. Referring to FIG. 13, Table 1 and Equation 3, in the case of a 200 MW circulating fluidized bed boiler (10) BMCR operation using coal as the bed material (M), the change in heat transfer area with respect to the output load is not linear, . ≪ / RTI > Such a graph may vary depending on the type of the layer material M, the shape of the layer material receiving portion 110 and the heat exchange pipe 130, and the like, and may be determined based on experimental data or the like.

Output load
Solid particle temperature (캜) Heat transfer coefficient Heat transfer area
Entrance exit 20 MW (100%) 884 670 374.7 A ₀ 15 MW (75%) 884 723 376.4 0.66 A ₀ 10 MW (50%) 884 777 379.4 0.39 A ₀ 6 MW (30%) 884 830 382.5 0.21 A ₀

As can be seen from Table 3, in the case of power generation using supercritical carbon dioxide, the output load and the required heat transfer area are not linearly related, and are expressed by Equation 3 below.

Where y = required heat transfer area (A / A ₀ ), x = output (W / W ₀ )

A ₀ is the total heat transfer area of the heat exchanger, and W ₀ is the maximum power generation system output.

FIG. 14 is a graph showing the circulation amount of the layer material according to the fluidized air flow rate in the power generation apparatus using the fluidized-bed boiler according to an embodiment of the present invention.

Referring to Fig. 14, it is shown that the amount of circulation of the layer material M can be controlled according to the flow supplied to the group chamber 13, the air flow rate, and the flow rate in the combustion furnace (fluidized bed boiler 10). In accordance with the same principle, the time of staying in the heat exchanging part 100 of the layer material M is controlled according to the flow rate of the fluidizing air supplied to the height adjusting part 151, The amount of heat transferred to the heat exchange pipe 130 can be adjusted.

The fluidized air supply unit 155 is provided in the height adjusting unit 151 and selectively supplies the fluidized air to the height adjusting unit 151 so that the layered material M is discharged through the height adjusting unit 151. In this embodiment, the fluidizing air supply unit 155 includes a compressed air reservoir 156, a fluid connection pipe 157, and a discharge portion 159.

The compressed air storage portion 156 stores compressed air. The fluid connection pipe 157 connects the compressed air storage unit 156 and the height adjustment unit 151 and includes a plurality of control valves 158 to control the flow of the fluid supplied to the height adjustment unit 151 . The airflow 159 supplies fluid to the compressed air reservoir 156.

The turbine unit 200 is connected to the heat exchange unit 100 and generates a rotational force by using the expansion of the working fluid heated in the heat exchange unit 100. The power generation unit 300 is connected to the turbine unit 200 and generates power using the rotational force of the turbine unit 200. The compression unit 400 is connected to the turbine unit 200 and compresses the working fluid discharged from the turbine unit 200 and transfers the compressed working fluid to the heat exchange unit 100. In this embodiment, the compression unit 400 includes a main compression unit 410 for compressing the working fluid cooled by the cooler 500 and a sub compression unit 430 for compressing the working fluid without cooling by the cooler 500 It can be divided.

Hereinafter, the operation principle and effects of the power generation apparatus 1 using the fluidized-bed boiler according to an embodiment of the present invention will be described.

The working fluid, which is exemplified by supercritical carbon dioxide, is compressed by the compression unit 400 to a high pressure, for example, 200 atmospheres or higher, and then moved along the heat exchange pipe 130 to the inside of the layer material accommodating unit 110. The working fluid entering the inside of the layer material receiving portion 110 and in particular the lower side of the layer material receiving portion 110 flows along the heat exchange pipe 130 while moving inside the layer material receiving portion 110, And is moved from the upper side of the layer material receiving portion 110 to the turbine portion 200 side.

The high temperature and high pressure working fluid moved to the turbine section 200 is thermally expanded in the turbine section 200 and rotates the rotation axis of the turbine section 200 so that electricity can be generated in the power generation section 300 connected to the rotation axis .

The cooler 500, and the like discharged from the turbine unit 200, and is then transmitted to the heat exchanger 100 again. The construction and operation principle of a general Brayton cycle or a recompression cycle are obvious to those skilled in the art, and a detailed description thereof will be omitted.

15 is a flowchart illustrating a process of controlling the amount of power generation using supercritical carbon dioxide in a power generation apparatus using a fluidized bed boiler according to an embodiment of the present invention.

15, when the output of the power generation apparatus 1 using the fluidized bed boiler is to be adjusted by a power supply instruction or the like, the control unit 170 controls the control valve 158 and the blowing unit 159 to control the height The control unit 150 controls the height of the layer material M received in the layer material receiving unit 110 and controls the height of the layer material M through the heat exchanging pipe 130 and the layer material height adjusting unit 150 of the layer material M. [ (M).

For example, when the output of the power generation apparatus 1 using the fluidized-bed boiler is to be increased, the control unit 170 controls the control valve 158 to cut off the supply of the fluidized air through the air inlet 153. When fluidized air is not supplied to the air inlet 153, the layer material M introduced into the layer material inlet 152 acts like a solid to seal the layer material inlet 152 and not to flow.

The layer material M received in the layer material receiving portion 110 is continuously stacked inside the layer material receiving portion 110 in a state in which the movement through the plurality of layer material height adjusting portions 150 is limited, 113). ≪ / RTI >

The height of the layer material M accommodated in the layer material receiving portion 110 is increased and the contact area of the layer material M contacting the heat exchanging pipe 130 is increased so that the working fluid flowing inside the heat exchanging pipe 130 Is increased.

Accordingly, the energy transmitted by the working fluid to the turbine section 200 and the power generated by the power generation section 300 are increased.

On the other hand, when it is necessary to reduce the output of the power generation apparatus 1 using the fluidized bed boiler, the control unit 170 controls the regulating valve 158 and the blowing unit 159 to supply the fluidized air through the air inflow unit 153 . When the fluidized air is supplied through the air inflow portion 153, the layer material M introduced into the layer material inflow portion 152 is fluidized and discharged to the discharge tube 113 through the controlled discharge portion 154.

The control unit 170 controls the position and flow rate of the layer material M to be discharged according to the amount of output reduction or the like to lower the height of the layer material M housed inside the layer material receiving unit 110, M is reduced and the contact area of the layer material M in contact with the heat exchange pipe 130 is reduced.

Accordingly, the energy transmitted by the working fluid to the turbine section 200 and the power generated by the power generation section 300 are reduced.

The height control S1 of the layer material M is performed by the user after inputting the set temperature T _D of the turbine section 200 or the desired output WD of the power generation section 300 The measured temperature TP is lower than the preset temperature TD or the desired output Tp is compared with the measured temperature TP of the turbine section 200 or the power output 300 of the power generation section 300 The controller 170 controls the layer material height adjuster 150 to increase the height of the layer material M in step S430 and to lower the height of the layer material M in step S410 when the measured output WD is lower than the measured output WD S400).

Thus, in the present embodiment, the power generation apparatus 1 using the fluidized-bed boiler can reduce the size of the heat exchange unit 100 by heating the working fluid using the layer material M having a relatively large heat transfer coefficient.

In the present embodiment, the power generation apparatus 1 using the fluidized-bed boiler can control the temperature of the heat exchange pipe 130 and the layer material M by adjusting the height of the layer material M accommodated in the layer material receiving portion 110 in a stepwise manner. It is possible to control the generation amount using supercritical carbon dioxide by adjusting the contact area or the time during which the layer material M is retained in the layer material receiving portion 110. [

In addition, in the present embodiment, the power generation apparatus 1 using the fluidized bed boiler can independently control the power generation amount using the supercritical carbon dioxide, independently of the operation of the fluidized bed boiler 10 and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

1: Power generator using fluidized bed boiler
10: Fluidized bed boiler 11: Bubble fluidized bed heat exchanger
13: Group room 14: Back pass
100: Heat exchanging part 110: Layer material receiving part
111: supply pipe 113: discharge pipe
130: Heat exchange pipe 131: Inner tube
133: outer tube 135: projecting pin
150: layer material height adjuster 151: height adjuster
152: layer material inlet 153: air inlet
154: regulated exhaust unit 155: fluidized-
156: Compressed air reservoir 157: Fluid connector
158: Control valve 159:
170: control unit 200: turbine unit
300: power generator 400:
M: Layer material

Claims (9)

A heat exchange unit provided in the fluidized bed boiler for heating the working fluid with the bed material;
A turbine section connected to the heat exchange section and generating a rotational force by using the expansion of the working fluid heated by the heat exchange section;
A power unit connected to the turbine unit and generating power using the rotational force of the turbine unit; And
A compression unit connected to the turbine unit and compressing the working fluid discharged from the turbine unit and delivering the compressed working fluid to the heat exchange unit;
Wherein the steam generator is a steam generator.
The power generation system using a fluidized-bed boiler according to claim 1, wherein the working fluid is supercritical carbon dioxide.
The heat exchanger according to claim 1 or 2,
A layer material accommodating portion in which the layer material is accommodated, a supply tube through which the layer material is supplied, and a discharge tube through which the layer material is discharged;
A heat exchange pipe which is connected to the compression unit and the turbine unit at both ends thereof and transfers the working fluid supplied from the compression unit to the turbine unit and is accommodated in the layer material storage unit and heated by the layer material; And
A layer material height adjuster which is in communication with the layer material accommodating portion and the discharge tube and regulates the position or amount of the layer material discharged through the discharge tube to adjust the height of the layer material accommodated in the layer material accommodating portion;
Wherein the steam generator is a steam generator.
The heat exchanger according to claim 3,
Wherein the bubbling fluidized bed heat exchanger is provided in a bubbling fluidized bed heat exchanger of the fluidized bed boiler.
The heat exchanger according to claim 3,
An inner tube having opposite ends connected to the compression section and the turbine section and having a working fluid moved inward; And
An outer tube which surrounds the inner tube and in which steam is moved between the inner tube and the inner tube;
Wherein the steam generator is a steam generator.
6. The power generation apparatus according to claim 5, wherein a plurality of projecting fins are formed on the inner tube or the outer tube so as to increase heat transfer efficiency with the working fluid or steam.
The apparatus of claim 3, wherein the layer material height adjuster comprises:
A plurality of height adjusting units communicating the inner side of the layer material receiving unit with the discharge pipe and having different heights; And
A fluidized air supply unit provided in the height adjusting unit and selectively supplying the fluidized air to the height adjusting unit to discharge the layered material through the height adjusting unit;
Wherein the steam generator is a steam generator.
[8] The apparatus of claim 7,
A layer material inlet communicating with the layer material receiving portion and into which the layer material is introduced from the layer material receiving portion;
An air inflow portion provided at a lower end of the layer material inflow portion and fluidically connected to the fluidized air supply portion to supply fluidized air to the layer material inflow portion; And
An adjustable discharge portion extending upward from the layer material inflow portion and communicating with the discharge pipe to guide movement of the layer material;
Wherein the steam generator is a steam generator.
8. The apparatus according to claim 7, wherein the fluidized-
A compressed air storage portion for storing compressed air;
A fluid connection pipe connecting the compressed air storage portion and the height adjustment portion to guide the movement of the fluidized air and to control the movement of the fluidized air by the control valve; And
A blowing unit for supplying a fluid to the compressed air storage unit;
Wherein the steam generator is a steam generator.

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