KR20170034716A - Monitoring system of back fire of combustor and method of back fire of combustor - Google Patents

Monitoring system of back fire of combustor and method of back fire of combustor Download PDF

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Publication number
KR20170034716A
KR20170034716A KR1020150133379A KR20150133379A KR20170034716A KR 20170034716 A KR20170034716 A KR 20170034716A KR 1020150133379 A KR1020150133379 A KR 1020150133379A KR 20150133379 A KR20150133379 A KR 20150133379A KR 20170034716 A KR20170034716 A KR 20170034716A
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KR
South Korea
Prior art keywords
combustor
flame
flow path
working fluid
temperature
Prior art date
Application number
KR1020150133379A
Other languages
Korean (ko)
Inventor
박세익
김미영
이종원
주용진
Original Assignee
한국전력공사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 한국전력공사 filed Critical 한국전력공사
Priority to KR1020150133379A priority Critical patent/KR20170034716A/en
Publication of KR20170034716A publication Critical patent/KR20170034716A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F23M11/04—Means for supervising combustion, e.g. windows
    • F23M11/045—Means for supervising combustion, e.g. windows by observing the flame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers

Abstract

The present invention relates to a system for monitoring a backfire of a combustor including: a passage unit formed in a part adjacent to flame of the combustor reversely flowing; a fluid intake unit supplying a working fluid to the passage unit; a fluid discharge unit receiving the working fluid leaked from the passage unit wherein the working fluid flows; and a sensing unit measuring a pressure or a temperature of the working fluid on one side of the fluid discharge unit and sensing damage to the part adjacent to the flame of the combustor reversely flowing. According to an embodiment of the present invention, the system for monitoring the backfire of the combustor is capable of sensing the backfire due to the flame in advance or later by forming the passage in the part where the flame of the combustor reversely flows, flowing the working fluid in the passage, and measuring the temperature or the pressure of the working fluid flowing inside the passage.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a monitoring system for combustor backflushing,

The present invention relates to a combustor backfire monitoring system and a combustor backfire monitoring method. More particularly, the present invention relates to a combustor backfire monitoring system and a combustor backfire monitoring method, The present invention relates to a combustor backflushing monitoring system and a combustor backflushing monitoring method for detecting burnout of a combustor.

Referring to FIG. 1, there is a problem that a flame injected from a nozzle is reversed and a temperature rises in a specific part of the combustor, so that burning occurs due to a rapid temperature rise at a point where the flame is in contact with the flame.

1 and 2, the portion of the combustor tip surrounding the nozzle and the end of the nozzle of the combustor may correspond to each other, have.

In order to solve at least part of the above-described problems, the present invention provides, as one aspect, a method for monitoring a possibility of burning due to backfire of a combustor by monitoring a temperature or a pressure of a working fluid flowing at a point where backfire is likely to occur in a combustor A combustor backflushing monitoring system and a combustor backflushing monitoring method.

According to an aspect of the present invention, there is provided a combustor comprising: a flow path portion formed in a portion adjacent to a flame backed by the combustor; a fluid inflow portion supplying a working fluid to the flow path portion; And a sensing unit for measuring a pressure or a temperature of the working fluid at one side of the fluid outlet and for detecting whether the flame is burned off in the vicinity of the back flame in the combustor.

The method comprising the steps of: measuring a temperature or a pressure of a working fluid flowing through a flow path portion formed in a portion adjacent to a flame backed by a combustor; detecting a temperature or pressure change measured in the measuring step; And a detection step of detecting a burn-out of the part to be back-burned.

As described above, according to an embodiment of the present invention, a flow path is formed at a point where a flame is backed up in a combustor, a working fluid flows through the flow path, and a temperature or a pressure of the flowing fluid is measured. Whether it is pre- or post-detection.

According to an embodiment of the present invention, it is possible to detect whether or not the combustor is burned out in advance or after, and to prevent a problem that a part of the burned combustor moves to a turbine blade area rotating at high speed, .

Fig. 1 (a) is a simplified view showing the position of the flame at the combustor tip, and Fig. 1 (b) is a photograph showing that the combustor tip is burned due to backfire.
2 is a cross-sectional view of the combustor showing the position of the flame at the nozzle end;
3 is a simplified diagram of a combustor backfire monitoring system in accordance with an embodiment of the present invention.
4 is a schematic view showing a flow path portion inside a combustor tip;
5 is a schematic view showing a flow path portion of a nozzle end portion;
FIG. 6 is a graph showing changes in temperature and pressure of a flow path portion due to flame backflow according to an embodiment of the present invention. FIG.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the embodiments described below are embodiments suitable for understanding the combustor backbone monitoring system 100 of the present invention. It should be understood, however, that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

The combustor backbone monitoring system 100 according to an embodiment of the present invention includes a flow path portion 110 formed at a portion adjacent to the flame f backed by the combustor 120, A fluid outlet portion 140 through which a working fluid flowing through the flow path portion 110 flows and a fluid outlet portion 140 through which the pressure or temperature of the working fluid is measured, And a detection unit 150 for detecting whether or not the part is burned.

Referring to FIG. 1, a portion of the combustor 120 adjacent to the flame f backed by the combustor 120 may correspond to an end of the combustor according to an embodiment of the present invention, that is, a combustor tip 121, The nozzle end 123 in which the flame is injected in the combustor according to another embodiment may be applied thereto.

In other words, the combustor tip 121 or the nozzle end 123 is a portion where the flame injected from the nozzle is reversed and comes into contact with the flame, so that the temperature rises abruptly and the possibility of burning is high.

However, the portion adjacent to the flame backed by the present invention includes not only the combustor tip 121 or the nozzle end 123 but also various embodiments as long as it corresponds to a portion where the flame is reversed and there is a possibility of burning due to a rapid temperature rise can do.

In addition, the flow path portion 110 according to an embodiment of the present invention may be formed at a portion adjacent to the back flame. In one embodiment, referring to Figures 3 and 4, it may be formed within the combustor tip 121.

3, the flow path portion 110 may be formed along the outer circumferential surface of the combustor tip 121. The flow path portion 110 may be formed along the outer circumferential surface of the combustor tip 121. For example, And a second flow path 112 connected to the first flow path 111 and formed in a radial direction of the combustor tip 121. The first flow path 111 is formed in the longitudinal direction of the combustor tip 121,

That is, in the case where the combustor tip 121 is provided in a cylindrical shape, the flow path portion 110 having the first flow path 111 and the second flow path 112, when the combustor tip 121 is deployed The shape of the entire flow path may be provided in a shape in which the serrations repeatedly appear. Here, the first flow path 111 corresponds to the flow path formed in the vertical direction in the drawing when the combustor tip 121 is expanded, and the second flow path 112 corresponds to the flow path formed in the horizontal direction .

However, the shape of the flow path portion 110 shown in FIG. 4 is merely an example, and a variety of flow path shapes formed inside the combustor tip 121 and flowing through the entire inside of the combustor tip 121 are possible Do. For example, the flow path portion 110 may be formed in a coil shape surrounding the combustor tip 121 inside the combustor tip 121, and in FIG. 3, the first flow path 111 and the second flow path 112 are vertically connected but curved surfaces are also possible.

The combustor backbone monitoring system 100 according to an embodiment of the present invention includes a fluid inlet 130 for supplying a working fluid to the flow path portion 110 through an inflow path 113, And a fluid outlet 140 through which the working fluid flows and flows out through the outflow channel 114.

In addition, the sensing unit 150 according to an embodiment of the present invention may measure the pressure or temperature of the working fluid flowing out of the flow path unit 110, and may detect whether the flame is reversed. That is, the sensing unit 150 may include a pressure measuring unit 152 installed at one side of the flow path outlet 140 and measuring the pressure of the working fluid, and a temperature measuring unit 152 measuring the temperature. have.

Referring to FIG. 6, in the sensing unit 150 according to an embodiment of the present invention, when the pressure of the working fluid suddenly drops by measuring the pressure of the working fluid, that is, It is judged that one side of the combustor is burned out and the working fluid flowing in the flow path portion 110 flows out of the flow path and flows out to the outside, so that the burner tip 121 is burned Can be detected.

 In addition, the sensing unit 150 according to an embodiment of the present invention measures the temperature of the working fluid, and when the temperature of the working fluid suddenly rises, the flame is reversed and the flame comes into contact with the flow path portion 110, It is judged that the temperature of the working fluid rises and the possibility of combustion of the combustor tip 121 due to the flame backlash is high when the temperature of the working fluid rises above the set temperature T1. In another embodiment, it is possible to determine that the possibility of combustion of the combustor tip 121 is large when the temperature rise ratio is larger than the set value, as in the case of measuring the pressure.

That is, the combustor backbone monitoring system 100 according to an embodiment of the present invention measures the temperature of the working fluid in the sensing unit 150 and detects the temperature of the working fluid before the combustor tip 121 is burned down due to backflame of the flame And stop the operation of the turbine.

In addition, the combustor backbone monitoring system 100 according to an embodiment of the present invention measures the pressure of the working fluid in the sensing unit 150, and when the pressure suddenly drops, the combustor tip 121 is burned It is possible to immediately take measures such as stopping the operation of the turbine.

5 shows the flow path portion 110 formed in the nozzle end portion 123 when the portion adjacent to the flame backed by the combustor is the nozzle end portion 123. In addition to the difference in the backward flow portion, The same description will be omitted.

Hereinafter, a combustor backfire monitoring method (S100) according to an embodiment of the present invention will be described.

The combustor backfire monitoring method (S100) according to an embodiment of the present invention includes a measuring step (S110) of measuring a temperature or pressure of a working fluid flowing in a flow path portion (110) formed in a portion adjacent to a flame backed by a combustor, And a sensing step S120 of detecting a change in temperature or pressure measured in step S110 and detecting whether the flame is reversed in the combustor.

The measurement step S110 is a step of measuring the temperature or pressure of the working fluid in the sensing unit 150, as described above.

In the sensing step S120, when the measured pressure of the working fluid drops below a predetermined value for a unit time, the one side of the flow path portion 110 is damaged due to backfire and the working fluid is separated from the flow path, It is possible to detect that the combustor tip 121 or the nozzle end 123 is burned off, for example, in the vicinity of the back flame.

In addition, according to another embodiment of the present invention, when the temperature of the working fluid measured in the sensing step S120 rises above the predetermined temperature T1, the flame is reversed to the flow path part 110, For example, the combustor tip 121 or the nozzle end 123 is likely to be burned off due to backfire.

In other words, the combustor backfire monitoring method (S100) according to an embodiment of the present invention monitors the pressure or temperature change by the flame backed by the combustor as described above, and determines the possibility of burning due to the flame backfire of the combustor, Can be detected.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled 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 following claims It will be understood by those skilled in the art that the present invention can be easily understood by those skilled in the art.

100: combustor backflow monitoring system 110:
111: first flow path 112: second flow path
121: combustor tip 123: nozzle end
130: fluid inlet part (140): fluid outlet part
150:
S100: Method of monitoring combustor backfire S110: Measurement step
S120: Detection step

Claims (9)

A combustor backfire monitoring system for monitoring combustor burnout by flame backfire in a gas turbine combustor in which a flame is injected,
A flow path portion formed in a portion adjacent to the flame backed by the combustor;
A fluid inflow portion for supplying a working fluid to the flow path portion;
A fluid outlet portion through which the working fluid flowing in the flow path portion flows out and is accommodated; And
And a sensing unit for measuring a pressure or a temperature of the working fluid at one side of the fluid outlet and detecting whether the flame adjacent to the flame backed by the combustor is burned. The method according to claim 1,
The flow-
Wherein the combustor tip is formed within the combustor tip. The method according to claim 1,
The flow-
Wherein the combustor is formed within the nozzle end of the combustor. 3. The method of claim 2,
The flow-
A first flow path formed in the longitudinal direction of the combustor tip and a second flow path connected to the first flow path and formed in a radial direction of the combustor tip. The method of claim 3,
The flow-
A first flow path formed in the longitudinal direction of the nozzle end portion and a second flow path connected to the first flow path and formed in a radial direction of the nozzle end portion. A measuring step of measuring a temperature or a pressure of a working fluid flowing through a flow path portion formed in a portion adjacent to the flame backed by the combustor; And
And a sensing step of sensing a temperature or pressure change measured in the measuring step and detecting whether the flame is reversed in the combustor. The method according to claim 6,
In the sensing step,
Measuring the pressure of the working fluid and determining that the flame adjacent to the flame backed by the combustor is damaged if the working fluid pressure falls below the set value for a unit of time. The method of claim 6, wherein
In the sensing step,
And the combustor backfire monitoring method determines that there is a high likelihood of burning off the flame adjacent to the flame in the combustor when the measured working fluid temperature rises above the set temperature. 9. The method according to claim 7 or 8,
After the sensing step,
Further comprising a notification step of informing whether the combustor is reversed by sound or visual means when the possibility of burning of the portion adjacent to the back flame is high.
KR1020150133379A 2015-09-21 2015-09-21 Monitoring system of back fire of combustor and method of back fire of combustor KR20170034716A (en)

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KR1020150133379A KR20170034716A (en) 2015-09-21 2015-09-21 Monitoring system of back fire of combustor and method of back fire of combustor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150133379A KR20170034716A (en) 2015-09-21 2015-09-21 Monitoring system of back fire of combustor and method of back fire of combustor

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KR20170034716A true KR20170034716A (en) 2017-03-29

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