KR101783869B1 - A temperature control system using closing and opening type vane - Google Patents

A temperature control system using closing and opening type vane Download PDF

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Publication number
KR101783869B1
KR101783869B1 KR1020160027694A KR20160027694A KR101783869B1 KR 101783869 B1 KR101783869 B1 KR 101783869B1 KR 1020160027694 A KR1020160027694 A KR 1020160027694A KR 20160027694 A KR20160027694 A KR 20160027694A KR 101783869 B1 KR101783869 B1 KR 101783869B1
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KR
South Korea
Prior art keywords
vane
exhaust gas
temperature
recovery boiler
batch recovery
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KR1020160027694A
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Korean (ko)
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KR20170104814A (en
Inventor
정승균
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두산중공업 주식회사
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Priority to KR1020160027694A priority Critical patent/KR101783869B1/en
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Publication of KR101783869B1 publication Critical patent/KR101783869B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/005—Control systems for instantaneous steam boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/007—Control systems for waste heat boilers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Control Of Turbines (AREA)

Abstract

The present invention relates to a temperature control system for controlling the temperature of an exhaust gas transferred from a gas turbine to an arrangement recovery boiler, the system comprising at least one vane, an internal flow passage formed in the vane, And at least one jetting port.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a temperature control system using an openable vane,

The present invention relates to a temperature control system using an openable vane, and more particularly, to a temperature control system using an openable vane for controlling the temperature of exhaust gas from a gas turbine to an arrangement recovery boiler.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for always maintaining a constant temperature of a superheated steam produced in a HRSG (Heat Recovery Steam Generator) of a combined cycle power plant, and more particularly, (HRSG) to steam, and it is sent to the places in the facility and the steam turbine to be able to produce electric power. In the initial operation of the steam generator or during the normal operation, steam The present invention relates to a device for preventing such an accident because the steam turbine can not maintain the temperature of the superheated steam when the generated load is under 30%, thereby causing damage to the steam turbine device and leading to an emergency.

In the conventional combined cycle power plant, the temperature control of the superheated steam outlet temperature of the heat recovery steam generator (HRSG) was manually controlled at low load. However, the conventional superheated steam outlet temperature control thus configured is not only sensitive to changes in the amount of steam but also has a problem of doubling the fatigue of the driver.

In addition, when the temperature of the superheated steam exceeds the maximum limit range due to the driver's mistake, the steam turbine may cause damage to the equipment, leading to an emergency, resulting in ineffective and uneconomical problems.

Patent Document 1 is an invention for controlling the temperature rise of the HRSG. Patent Document 1 simply discloses an invention using cooling water, while the present invention suggests a temperature control system for injecting cooling water or air using a vane capable of opening and closing a combustion gas flow.

U.S. Published Patent Application No. 2012-0198846

SUMMARY OF THE INVENTION It is an object of the present invention to provide a temperature control system including a vane having an internal flow path and an injection port for controlling the temperature rise of the HRSG.

According to an aspect of the present invention, there is provided a temperature control system for controlling a temperature of an exhaust gas transferred from a gas turbine to an arrangement recovery boiler, the system including at least one vane, And at least one injection port provided on the vane surface and connected to the internal flow path.

The vane is provided in the form of an airfoil, and water or air introduced from the outside flows through the internal passage.

The jetting port includes opening / closing means.

And the leading edge of the vane is provided in a direction in which the exhaust gas flows.

The vane may be provided in a connecting duct connecting the gas turbine and the batch recovery boiler, or the batch recovery boiler may include a heat exchanger, and the vane may be provided between the inlet of the batch recovery boiler and the heat exchanger.

And the vane is rotatable around a rotation axis perpendicular to the flow direction of the exhaust gas.

The temperature control system according to another embodiment of the present invention may further include a control unit for measuring the temperature of the exhaust gas and regulating the operation of the vane, When the temperature of the exhaust gas is equal to or higher than the reference temperature, the injection port is opened to inject water or air introduced from the outside.

And the control unit controls the vanes to rotate so as to reduce the inflow amount of the exhaust gas when the batch recovery boiler is in the starting state.

According to another embodiment of the present invention, there is provided a temperature control method comprising: an arithmetic operation step of calculating a reference temperature of an exhaust gas allowed in an arrangement recovery boiler, a measuring step of measuring a temperature of the exhaust gas, And a cooling step of spraying water or air introduced from the outside at a vane provided between the gas turbine and the arrangement recovery boiler when the temperature is equal to or higher than the reference temperature.

And an opening and closing step of rotating the vane when the batch recovery boiler is in a starting state to reduce the flow of exhaust gas flowing into the batch recovery boiler.

According to the present invention, the exhaust gas flow can be uniformly cooled by providing a vane in consideration of the flow of the exhaust gas flowing into the arrangement recovery boiler, unlike the prior art in which the temperature is controlled by using cooling water or by sucking outside air.

In addition, it is possible to prevent the internal temperature of the batch recovery boiler from rising sharply by regulating the flow amount of the exhaust gas flowing by rotating the vane.

Fig. 1 schematically shows a combined-cycle power plant.
Fig. 2 is a view of the combined-cycle power plant of Fig. 1 viewed in a direction B; Fig.
3 illustrates a cross-section of a vane according to one embodiment of the present invention.
4 shows a vane rotating in accordance with an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

Fig. 1 schematically shows a combined-cycle power plant. 1 shows a gas turbine 10, a connecting duct 20, an arrangement recovery boiler 30, and a heat exchanger 40. Will be described with reference to the drawings.

The batch recovery boiler 30 regenerates heat by using the exhaust gas discharged from the outlet of the gas turbine 10 and the heat exchanger 40. The exhaust gas from the gas turbine 10 flows into the batch recovery boiler 30. At this time, the outlet of the gas turbine 10 and the inlet of the batch recovery boiler 30 may be directly connected to each other and the outlet of the gas turbine 10 There may be a connecting duct 20 connecting the inlet of the batch recovery boiler 30.

1 shows a case where a connecting duct 20 is provided. The exhaust gas flowing through the connecting duct 20 diffuses the flow in the batch recovery boiler 30 and passes through the heat exchanger 40. When the combined cycle power plant including the gas turbine 10 and the batch recovery boiler 30 is started or starts to operate, when the exhaust gas of high temperature passes directly through the heat exchanger 40, The temperature of the exhaust gas should be controlled appropriately.

Fig. 2 is a view of the combined-cycle power plant of Fig. 1 viewed in a direction B; Fig. 3 illustrates a cross-section of a vane 100 according to one embodiment of the present invention. Figure 4 illustrates the rotation of the vane 100 in accordance with one embodiment of the present invention.

The heat exchanger 40, the vane 100, the rotary shaft 130, the internal passage 110, and the injection port 120 are shown in the drawing. Referring to the drawings, the vane 100 is provided in the section A shown in FIG.

Section A corresponds to the heat exchanger 40 from the inlet of the connecting duct 20 when there is a connecting duct 20 connecting the outlet of the gas turbine 10 and the inlet of the arrangement recovery boiler 30. [ In the absence of the connecting duct 20, section A corresponds to the section from the inlet of the batch recovery boiler 30 to the heat exchanger 40.

Since the vane 100 prevents the heat exchanger 40 from being overheated, when the plurality of heat exchangers 40 are present, at least the heat exchanger 40, which is closest to the inlet of the exhaust heat recovery boiler 30, So that it is not installed behind.

Since the vane 100 is configured to control the temperature of the exhaust gas flow, it is preferable that the vane 100 has an airfoil shape. The airfoil shape preferably has a leading edge facing the exhaust gas inlet direction or the inlet side of the batch recovery boiler (30). The vanes 100 may be provided in plural as needed and are not limited to the number. In a preferred embodiment, the plurality of vanes 100 are symmetrical about the heat exchanger 40 as shown in FIG. Thereby, the exhaust gas flow can be uniformly distributed.

The longitudinal direction of the vane 100 is preferably provided in a direction perpendicular to the exhaust gas flow. An internal flow path 110 is formed in the vane 100 along the longitudinal direction of the vane 100. At least one injection port 120 is provided on the outer surface of the vane 100 and the injection port 120 is connected to the inner flow path 110 of the vane 100. Cooling water or air introduced from the outside may flow into the internal flow path 110. If the fluid is capable of performing the cooling function, it can be used as a cooling fluid flowing through the internal flow path 110.

The exhaust gas flows along the front edge of the vane 100, and at this time, the cooling fluid is injected through the injection port 120, so that the temperature of the exhaust gas is lowered. The jetting port 120 may include opening and closing means to open and close the jetting port 120 as needed, and may increase the pressure of the jetting cooling fluid.

The vane 100 may also be rotated as shown in Figs. 2 and 4. The vane 100 can rotate about the rotation axis 130. By rotating the vane 100, the amount of exhaust gas flowing into the batch recovery boiler 30 can be adjusted. The rotating shaft 130 is preferably perpendicular to the exhaust gas flow and preferably penetrates the vane 100 so as to approach the front of the vane 100 and the front of the rear vane.

In the state where the line connecting the leading and trailing edges of the vane 100 is arranged in parallel with the exhaust gas flow, the exhaust gas flow is maximally introduced with the vane 100 opened. On the other hand, when the vane 100 is rotated so that the angle formed by the line connecting the front and the back of the vane 100 from the exhaust gas flow is smaller or larger than 180 degrees, the flow of the exhaust gas flowing into the vane 100 is reduced. When a plurality of vanes 100 are provided, the flow of exhaust gas flowing through the vanes 100 can be reduced by appropriately rotating each vane 100 so that the flow passing between the vanes 100 is reduced, It is possible to prevent the temperature of the heat exchanger (40) from rising sharply.

The temperature control system may further include a control unit for controlling the temperature of the exhaust gas transferred from the gas turbine 10 to the batch recovery boiler 30. [ At this time, the control unit controls the operation of the vane 100 by calculating the reference temperature of the exhaust gas allowed in the batch recovery boiler 30 and measuring the temperature of the exhaust gas.

The reference temperature of the exhaust gas permitted to the exhaust heat recovery boiler 30 is a temperature which varies depending on the operation state of the exhaust heat recovery boiler 30. The reference temperature when the exhaust heat recovery boiler 30 is normally operated is a temperature ) Is higher than the reference temperature at the start-up state.

The control unit measures the temperature of the exhaust gas flowing into the batch recovery boiler 30 and compares the two values by calculating an allowable reference temperature according to the operating state of the batch recovery boiler 30. [ In order to lower the temperature of the exhaust gas when the temperature of the exhaust gas flowing into the exhaust gas is higher than an allowable reference temperature, water or air from the outside is injected from the vane 100 or the vane 100 is rotated, The exhaust gas flow can be reduced.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Gas Turbine
20: Connection duct
30: Sequence recovery boiler
40: heat exchanger
100: Vane
110:
120: nozzle
130:

Claims (11)

1. A temperature control system for controlling the temperature of an exhaust gas delivered from a gas turbine to an arrangement recovery boiler,
A plurality of vanes of an airfoil structure arranged in such a manner as to be mounted between the inlet of the batch recovery boiler and the heat exchanger and surrounding the heat exchanger;
An inner flow path formed inside the vane, in which water or air introduced from the outside flows in the direction of the injection port; And
An injection port formed inside the vane so as to communicate with the outside of the upper surface of the vane, the injection port being equipped with opening / closing means for opening / closing the communication structure;
Lt; / RTI >
Wherein the vane is provided inside a connecting duct connecting the gas turbine and the arrangement recovery boiler,
Wherein the vane is rotatable about a rotation axis perpendicular to a flow direction of the exhaust gas,
Further comprising a control unit for measuring the temperature of the exhaust gas and regulating the operation of the vane,
Wherein the control unit calculates a reference temperature of the exhaust gas according to an operation state of the batch recovery boiler, and opens the injection port to inject water or air introduced from outside when the temperature of the exhaust gas is equal to or higher than the reference temperature,
Wherein the control unit rotates the vane to reduce the inflow amount of the exhaust gas when the batch recovery boiler is in the starting state.
delete delete The method according to claim 1,
Wherein a leading edge of the vane is provided in a direction in which the exhaust gas is introduced.
delete delete delete delete delete A temperature control method using a temperature control system according to claim 1,
An arithmetic step of calculating a reference temperature of the exhaust gas permitted to the batch recovery boiler;
A measuring step of measuring a temperature of the exhaust gas; And
A cooling step of injecting water or air introduced from the outside into a vane provided between the gas turbine and the arrangement recovery boiler when the temperature of the exhaust gas is equal to or higher than the reference temperature;
/ RTI >
The method of claim 10,
Further comprising: an opening / closing step of rotating the vane to reduce exhaust gas flow into the batch recovery boiler when the batch recovery boiler is in a starting state.

KR1020160027694A 2016-03-08 2016-03-08 A temperature control system using closing and opening type vane KR101783869B1 (en)

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KR1020160027694A KR101783869B1 (en) 2016-03-08 2016-03-08 A temperature control system using closing and opening type vane

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KR101783869B1 true KR101783869B1 (en) 2017-10-10

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003065003A (en) * 2001-08-13 2003-03-05 General Electric Co <Ge> Baffle in tangential flow direction and turbine nozzle where the baffle is positioned

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003065003A (en) * 2001-08-13 2003-03-05 General Electric Co <Ge> Baffle in tangential flow direction and turbine nozzle where the baffle is positioned

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