KR200483460Y1 - flame detector - Google Patents

flame detector Download PDF

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Publication number
KR200483460Y1
KR200483460Y1 KR2020150008629U KR20150008629U KR200483460Y1 KR 200483460 Y1 KR200483460 Y1 KR 200483460Y1 KR 2020150008629 U KR2020150008629 U KR 2020150008629U KR 20150008629 U KR20150008629 U KR 20150008629U KR 200483460 Y1 KR200483460 Y1 KR 200483460Y1
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KR
South Korea
Prior art keywords
detector
water jacket
flame
combustor
cooling passage
Prior art date
Application number
KR2020150008629U
Other languages
Korean (ko)
Inventor
김연천
Original Assignee
한국서부발전 주식회사
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.)
Filing date
Publication date
Application filed by 한국서부발전 주식회사 filed Critical 한국서부발전 주식회사
Priority to KR2020150008629U priority Critical patent/KR200483460Y1/en
Application granted granted Critical
Publication of KR200483460Y1 publication Critical patent/KR200483460Y1/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
    • 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
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • 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
    • F23M2700/00—Constructional details of combustion chambers
    • F23M2700/008—Preventing outwards emission of flames or hot gases
    • 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
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/11041—Means for observing or monitoring flames using photoelectric devices, e.g. phototransistors

Abstract

In the present invention, a flame detecting apparatus capable of improving cooling performance by having a first water jacket and a second water jacket is disclosed.
For example, in a flame detection apparatus provided on an outer wall of a combustor, the flame detection apparatus may include a detector for detecting ultraviolet rays generated in a flame inside the combustor; A first water jacket formed to surround the detector and having a first cooling passage therein; A connecting part having one end and the other end connected to the combustor and the detector, respectively, and having a through hole therein; And a second water jacket formed to surround a peripheral region of the connection portion adjacent to the detector, the second water jacket having a second cooling passage therein.

Description

Flame detector

The present invention relates to a flame detection device.

In general, the flame detector is installed in the combustion device to detect the flame condition. That is, the flame detector detects the intensity of the ultraviolet ray generated in the flame inside the combustion apparatus, thereby detecting the abnormality of the combustion state.

On the other hand, such a flame detector is exposed to a high temperature environment so that malfunctions or failures are frequent, resulting in short life span and high replacement frequency. Accordingly, there is a need to improve the cooling performance of the flame detector in order to increase the reliability of the flame detector and operate the equipment stably.

The present invention provides a flame detection device capable of improving cooling performance by having a first water jacket and a second water jacket.

In the flame detection device installed on the outer wall of the combustor according to the present invention, the flame detection device may include a detector for detecting ultraviolet rays generated in the flame inside the combustor; A first water jacket formed to surround the detector and having a first cooling passage therein; A connecting part having one end and the other end connected to the combustor and the detector, respectively, and having a through hole therein; And a second water jacket formed to surround the circumferential region of the connection portion adjacent to the detector and having a second cooling passage therein.

Here, the first water jacket may be formed as a circular ring whose cross section includes a through hole at the center.

The detector may be accommodated in the through hole.

Further, the first cooling passage may be formed as a ring having a circular cross section.

In addition, the first cooling passage may be formed so as to surround the circumference of the detector.

In addition, an inlet and an outlet may be formed on one side wall and the other side wall of the first water jacket so as to be connected to the first cooling passage.

Further, the second cooling passage may be formed by a ring having a circular cross section.

In addition, the second cooling passage may be formed so as to surround an area of the through hole adjacent to the detector.

In addition, an inlet and an outlet may be formed in one side wall and the other side wall of the second water jacket so as to be connected to the second cooling passage.

Further, the inside of the combustor and the detector can be opposed to each other through the through-hole.

The flame detection apparatus according to the present invention can improve the cooling performance by having the first water jacket surrounding the body of the detector and the second water jacket positioned between the detector and the combustor.

1 is a schematic diagram of a gas turbine with a flame detection device according to an embodiment of the present invention;
Fig. 2 specifically shows part A of Fig.
3 is a cross-sectional view of a flame detection apparatus according to an embodiment of the present invention.
4 is a plan view of a first water jacket of a flame detection device according to an embodiment of the present invention.
5 is a photograph showing a flame detection apparatus according to an embodiment of the present invention.
6 is a photograph of the first water jacket separated from the flame detecting apparatus according to the embodiment of the present invention.
7 is a photograph of the first water jacket of the flame detecting device according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention.

Hereinafter, a gas turbine equipped with a flame detecting apparatus according to an embodiment of the present invention will be described.

1 is a schematic diagram of a gas turbine with a flame detection device according to an embodiment of the present invention;

Referring to Figure 1, a gas turbine may include an air inlet, a compressor, a combustion chamber, a turbine, and an exhaust.

First, clean air flows into the gas turbine through the air inlet.

And the clean air is compressed to a certain pressure (for example, 14 kg / cm < 2 >) in the compressor. At this time, the compressor can be constituted by 18 stages. In addition, such compressed air can be used for combustion, cooling, and dilution. Then, the compressed air is supplied to the combustion chamber.

In the combustion chamber, compressed air and fuel (for example, NG, light oil) supplied through a fuel nozzle are mixed and burned. The combustion chamber may be composed of a multi-can combustion chamber in which fourteen can combustors are radially arranged. Also, in each of the combustors, an ignition device is installed to combust the compressed air and the fuel.

The high-temperature and high-pressure combustion gas (for example, 1280 ° C) generated in the combustor is generated by rotating the turbine through three nozzles and a bucket.

The exhaust gas discharged from the turbine (for example, 620 DEG C) is heated by a boiler (not shown) located at the rear end through the exhaust part and discharged into the stack.

Meanwhile, the combustor is provided with a flame detecting device for detecting the combustion state. For example, a flame detecting device may be installed in the area A in Fig. The flame detecting apparatus detects the intensity of ultraviolet rays generated during the combustion and detects the flame state and determines whether or not there is an abnormality.

Hereinafter, a flame detecting apparatus according to an embodiment of the present invention will be described.

Fig. 2 specifically shows part A of Fig. 3 is a cross-sectional view of a flame detection apparatus according to an embodiment of the present invention. 4 is a plan view of a first water jacket of a flame detection device according to an embodiment of the present invention.

Referring to FIGS. 2 to 4, the flame detecting apparatus 100 according to the embodiment of the present invention includes a detector 110, a first water jacket 120, a cable receiving portion 130, a connecting portion 140, And a water jacket 150. In addition, the flame detecting apparatus 100 may be installed to be coupled to the outer wall of the combustor 10.

The detector 110 includes a body 111, a plate 112, and an electrode 113. The body 111 contains hydrogen gas G and an electrode 113 therein. The plate 112 is coupled to one end of the body 111 facing the combustor 10. The plate 112 is preferably made of a material through which ultraviolet rays can pass so that the electrode 113 can sense ultraviolet rays in the combustor 10. [ Specifically, the plate 112 may be made of a material such as glass. The electrode 113 is made of a metal electrode, for example, a copper electrode can be used. On the other hand, the electrode 113 is connected to an external device such as an external power source, a frequency measuring device, a control unit, etc. by a cable 114.

A voltage of, for example, about 335 VDC may be continuously supplied to the electrode 113 of the detector 110. When ignition is performed in the combustor 10, the hydrogen gas of the detector 110 is ionized by receiving ultraviolet rays (for example, 1900 to 2600 angstroms) emitted from the flame. Therefore, a charging / discharging current flows between the electrodes 113, and the frequency is measured through a frequency meter connected to the outside by amplifying the intermittent current. That is, the state of the flame can be determined by measuring the frequency characteristic proportional to the intensity of the ultraviolet ray with the flame detection signal.

If the measured frequency is within the predetermined range, the controller (not shown) determines that the flame state is normal. On the contrary, when the measured frequency is out of the predetermined range, the control unit judges that the flame condition is abnormal. Also, in the abnormal state, the control unit may generate an abnormal signal and transmit it to the operator. On the other hand, the frequency during normal operation may be between 110 and 130 Hz, and most preferably about 120 Hz.

The first water jacket 120 surrounds the body 111 of the detector 110 and has a circular ring-shaped cross section. That is, the first water jacket 120 has one side and the other side formed with a through hole 124 at a central portion thereof, and the detector 110 is accommodated in the through hole 124.

The first water jacket 120 is provided therein with a first cooling passage 121 having a circular ring-shaped cross section. Here, the first cooling passage 121 is formed so as to surround the circumference of the detector 110. In addition, an inlet 122 and an outlet 123 are provided on one side wall and the other side wall of the first water jacket 120. Therefore, the cooling water introduced through the inlet 122 absorbs the heat of the surrounding high temperature while passing through the first cooling passage 121, and is discharged through the outlet 123. That is, it is possible to prevent the high temperature heat from being introduced into the detector 110 by the first water jacket 120, and to cool the detector 110.

A high temperature gas exists in the peripheral region of the combustor 10 due to the combustion action, and the first water jacket 120 can prevent heat from being applied to the detector 110. That is, the detector 110 prevents the heat transfer due to the convection of the hot gas by the first water jacket 120, thereby remarkably reducing the malfunction and malfunction.

The cable receiving portion 130 is formed extending from the first water jacket 120 in a direction away from the combustor 10. The cable receiving portion 130 includes a receiving space in which the cable receiving portion 130 is connected to the through hole 124. Such as a cable connected to the detector 110, may be accommodated in the receiving space.

The connection part 140 is located between the detector 110 and the combustor 10. That is, one end and the other end of the connection unit 140 are coupled with the combustor 10 and the detector 110, respectively, to connect the two. Specifically, one end of the connection portion 140 is coupled to the outer surface of the combustor 10 through the connection plate 142 and the coupling portion 143. The other end of the connection part 140 is coupled to the detector 110. The other end of the connection part 140 may be coupled to the first water jacket 120.

The connection part 140 has a through hole 141 at the center thereof. Through the through-hole 141, the detector 110 is directed to the inside of the combustor 10. That is, the ultraviolet rays generated from the flame in the combustor 10 can be transmitted to the detector 110 through the through hole 141.

The second water jacket 150 protrudes from the connection part 140 to have a larger diameter. The second water jacket 150 is formed to surround a circumferential area of the connection part 140 adjacent to the detector 110. That is, the second water jacket 150 may be formed at the boundary between the connection unit 140 and the detector 110.

The second water jacket 150 may also have a structure similar to that of the first water jacket 120. That is, the second water jacket 150 surrounds the through-hole 141 and has a circular ring-shaped cross section. In addition, the second water jacket 150 includes a second cooling passage 151 having a circular ring-shaped cross section inside thereof. Here, the second cooling passage 151 is formed so as to surround the perimeter of the through-hole 141. In addition, an inlet 152 and an outlet 153 are provided on one side wall and the other side wall of the second water jacket 150. Accordingly, the cooling water flowing through the inlet 152 absorbs heat of high temperature while passing through the second cooling passage 151, and is discharged through the outlet 153. That is, the second water jacket 150 prevents the high temperature heat from flowing into the detector 110.

The second water jacket 150 is formed in the boundary region between the detector 110 and the connecting portion 140 of the through hole 141 to prevent the heat from being transmitted from the combustor 10 to the detector 110 can do. That is, even if the high-temperature heat in the combustor 10 moves through the through-hole 141 in the direction of the detector 110, the cooling water is cooled by the cooling water in the second water jacket 150, The temperature change is minimized.

The body 110 of the detector 110 is surrounded by the first water jacket 120 so that the detector 110 can be prevented from being heated from the high temperature heat around the combustor 10 . The region of the connecting portion 140 adjacent to the detector 110 is surrounded by the second water jacket 150 so that the heat of the high temperature in the combustor 10 flows through the through- It can be prevented from being transmitted to the detector 110.

That is, the first water jacket 120 and the second water jacket 150 can increase the cooling efficiency of the detector 110 and block heat transmitted to the detector 110. Therefore, the deterioration of the detector 110 can suppress the generation of an abnormal signal, thereby improving operation reliability and enabling stable operation of the combustor. Also, the number of times of replacement of the detector 110 is reduced to shorten the inspection and maintenance time, and the material cost can be reduced due to the extension of the service life. In addition, since the cooling effect is improved, the surface temperature of the detector 110 can be measured during operation, so that the detector 110 can be easily checked regardless of the situation.

Hereinafter, an actual application example of the flame detecting apparatus according to the embodiment of the present invention will be described.

5 is a photograph showing a flame detection apparatus according to an embodiment of the present invention. 6 is a photograph of the first water jacket separated from the flame detecting apparatus according to the embodiment of the present invention. 7 is a photograph of the first water jacket of the flame detecting device according to the embodiment of the present invention.

As shown in FIGS. 5 to 7, a connection unit 140 is connected to the outside of the combustor by a coupling plate 142. A first water jacket 120 is installed at an end of the connection part 140. At this time, the detector 110 may be accommodated in the first water jacket 120. In addition, a second water jacket 150 is provided in a region of the connection portion 140 adjacent to the first water jacket 120. The first and second water jackets 120 and 150 are formed with an inlet and an outlet for the inflow and outflow of the cooling water. Cooling water flows inside the first and second water jackets 120 and 150 to cool the detector 110 and absorb the heat around the detector 110 to prevent the temperature of the detector 110 from rising .

On the other hand, the detector 110 disclosed in FIG. 6 is only one example for implementing the present invention, and the present invention is not limited thereto. That is, any kind of detector may be used as long as it is a detector having a purpose of detecting a flame condition.

Table 1 below shows the surface temperature of the detector when both the first water jacket and the second water jacket are installed in the flame detecting apparatus installed in the combustor of the gas turbine and only the second water jacket is installed.

Temperature (℃) First water jacket + second water jacket 41 Second water jacket 185

From the results shown in Table 1, it can be seen that the flame detection apparatus according to the present invention has both the first and second water jackets, thereby maximizing the cooling effect.

The above description is only one embodiment for carrying out the flame detecting apparatus according to the present invention, and the present invention is not limited to the above-described embodiment, but is deviated from the gist of the present invention as claimed in the following claims It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

10; Combustor 110; Detector
111; Body 112; plate
113; Electrode 114; cable
120; A first water jacket 121; The first cooling passage
122; Inlet 123; Outlet
124; Through hole 130; Cable receiving portion
140; A connecting portion 141; Through hole
150; A second water jacket 151; The second cooling passage
152; Inlet 153; Outlet

Claims (10)

A flame detecting device installed on an outer wall of a combustor,
The flame detecting device includes:
A detector for detecting ultraviolet rays generated in a flame inside the combustor;
A first water jacket formed to surround the detector and having a first cooling passage therein;
A connecting part having one end and the other end connected to the combustor and the detector, respectively, and having a through hole therein;
And a second water jacket formed to surround a peripheral region of the connection portion adjacent to the detector and having a second cooling passage therein,
The second water jacket is formed at a boundary portion between the connection portion and the detector,
Wherein the first water jacket and the second water jacket are connected to each other. The method according to claim 1,
Wherein the first water jacket is formed as a circular ring whose cross section has a through hole at the center thereof. 3. The method of claim 2,
And the detector is accommodated in the through hole. The method according to claim 1,
Wherein the first cooling passage is formed by a ring having a circular cross-section. The method according to claim 1,
And the first cooling passage is formed so as to surround the periphery of the detector. The method according to claim 1,
Wherein an inlet and an outlet are formed on one side wall and the other side wall of the first water jacket, respectively, so that the flame is connected to the first cooling passage. The method according to claim 1,
Wherein the second cooling passage is formed by a ring having a circular cross section. The method according to claim 1,
And the second cooling passage is formed so as to surround an area of the through hole adjacent to the detector. The method according to claim 1,
And an inlet port and an outlet port are formed in one side wall and the other side wall of the second water jacket, respectively, so that the flame is connected to the second cooling passage. The method according to claim 1,
Wherein the inside of the combustor and the detector face each other through the through-hole.
KR2020150008629U 2015-12-30 2015-12-30 flame detector KR200483460Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020150008629U KR200483460Y1 (en) 2015-12-30 2015-12-30 flame detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020150008629U KR200483460Y1 (en) 2015-12-30 2015-12-30 flame detector

Publications (1)

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KR200483460Y1 true KR200483460Y1 (en) 2017-05-17

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200329933Y1 (en) * 2003-07-05 2003-10-17 주식회사 포스코 cooling apparatus of a flame detector
KR20040107669A (en) * 2003-06-09 2004-12-23 주식회사 포스코 An flame detecting apparatus having cooling and foreign substance influxing prevention function

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040107669A (en) * 2003-06-09 2004-12-23 주식회사 포스코 An flame detecting apparatus having cooling and foreign substance influxing prevention function
KR200329933Y1 (en) * 2003-07-05 2003-10-17 주식회사 포스코 cooling apparatus of a flame detector

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