CN114034059A - Device for improving sensitivity of flame detection probe of gas boiler in power plant - Google Patents
Device for improving sensitivity of flame detection probe of gas boiler in power plant Download PDFInfo
- Publication number
- CN114034059A CN114034059A CN202111369424.1A CN202111369424A CN114034059A CN 114034059 A CN114034059 A CN 114034059A CN 202111369424 A CN202111369424 A CN 202111369424A CN 114034059 A CN114034059 A CN 114034059A
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- Prior art keywords
- probe
- fire detection
- cooling air
- main body
- air pipe
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention relates to a device for improving the sensitivity of a flame detection probe of a gas boiler in a power plant, which comprises a probe main body (2) fixed on a furnace wall (1), wherein the front end of the probe main body (2) extends into a hearth (3) and is provided with a lens component (21), the rear end of the probe main body (2) is provided with a UV photosensitive tube (22) and a probe circuit board (23), one side of the probe main body (2) positioned outside the hearth (3) is connected with a fire detection cooling air pipe (4), and the fire detection cooling air pipe (4) is communicated with the probe main body (2); a hose (5) is connected between the rear cover (24) of the probe main body (2) and the fire detection cooling air pipe (4). The invention has the advantages of reducing the temperature of the circuit board and the photosensitive tube at the rear part of the fire detection probe and improving the sensitivity of the photosensitive tube, thereby improving the reliability of the fire detection probe and reducing the fault rate of the fire detection probe.
Description
Technical Field
The invention relates to the technical field of power generation equipment, in particular to a device for improving the sensitivity of a flame detection probe of a gas boiler in a power plant.
Background
The FSSS system of the gas boiler of the power plant is one of important protection systems, and the quality of the FSSS system is directly influenced by the normal operation of the FSSS system as an eye flame detection system.
The fire detection related protection in the FSSS logic is:
(1) during the ignition process, when the fire cannot be detected within 10 seconds of fire detection, the burner gas valve is automatically closed;
(2) in normal operation, when the fire is detected for 3/4 and the fire is not detected for more than 10 seconds, the system considers that fuel is lost, MFT acts, and the boiler jumps.
After long-term maintenance, 80% of faults of the fire detection system are faults of the fire detection probe, and most of the faults of the fire detection probe are caused by faults of the UV photosensitive tube. After analysis, the service life of the photosensitive tube is greatly related to the ambient temperature, when the ambient temperature exceeds 45 ℃, the stroboflash of the photosensitive tube is high, and when the ambient temperature exceeds 60 ℃, the stroboflash of the photosensitive tube is fast broken, so that the problems that how to improve the ambient temperature of the fire detection probe, improve the reliability of the VU photosensitive tube and reduce the failure rate of the VU photosensitive tube are urgently needed to be solved are found.
Disclosure of Invention
The invention aims to solve the problems of high failure rate and low reliability of a photosensitive tube of the conventional fire detection probe, and provides a device for improving the sensitivity of a flame detection probe of a gas boiler in a power plant, which reduces the temperature of a circuit board and the photosensitive tube at the rear part of the fire detection probe and improves the sensitivity of the photosensitive tube, thereby improving the reliability of the fire detection probe and reducing the failure rate of the fire detection probe.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for improving the sensitivity of a flame detection probe of a gas boiler of a power plant comprises a probe main body fixed on a furnace wall, wherein the front end of the probe main body extends into a hearth and is provided with a lens assembly, and the rear end of the probe main body is provided with a UV photosensitive tube and a probe circuit board for detecting the condition in the hearth through a fire detection probe;
one side of the probe main body, which is positioned outside the hearth, is connected with a fire detection cooling air pipe, and the fire detection cooling air pipe is communicated with the probe main body and is used for cooling the lens assembly by injecting cooling air into the air pipe;
the rear end of the probe main body is fixed with a rear cover which is arranged right opposite to the UV photosensitive tube and the probe circuit board, a junction box cavity is arranged between the rear cover and the probe circuit board, and a hose is connected between the rear cover and the fire detection cooling air pipe so as to introduce cooling air into the rear end of the probe to cool the photosensitive tube and the probe circuit board.
Furthermore, the fire detection cooling air pipe is obliquely arranged towards the furnace wall, and an included angle alpha between the axis of the fire detection cooling air pipe and the axis of the probe main body is an acute angle.
Furthermore, an included angle alpha between the axis of the fire detection cooling air pipe and the axis of the probe main body is 30-45 degrees.
Furthermore, one end of the hose is connected with the fire detection cooling air pipe through a first quick connector, and the other end of the hose is connected with the rear cover through a second quick connector.
Furthermore, the first quick-connection plug is arranged close to the joint of the fire detection cooling air pipe and the probe main body.
Further, the second quick-plug connector is connected to the middle upper part of the rear cover.
Further, the hose is a PU pipe.
According to the technical scheme, the special fire detection cooling air for the probe is introduced into the junction box through the joint hose, so that the temperatures of a circuit board and a photosensitive tube at the rear part of the fire detection probe are reduced, the floating ash on the photosensitive tube can be cleaned through continuous cooling air, the sensitivity of the photosensitive tube is improved, the reliability of the photosensitive tube is improved, and the fault rate of the fire detection probe is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the device for improving the sensitivity of the flame detection probe of the gas boiler in the power plant.
Detailed Description
Example 1
In order to make the present invention more clear, the following further describes an apparatus for improving the sensitivity of a flame detection probe of a gas boiler of a power plant according to the present invention, and the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
Referring to fig. 1, a device for improving sensitivity of a flame detection probe of a gas boiler in a power plant, comprising a probe body 2 fixed on a furnace wall 1, wherein the front end of the probe body 2 extends into a hearth 3 and is provided with a lens assembly 21, and the rear end of the probe body 2 is provided with a UV photosensitive tube 22 and a probe circuit board 23, and is characterized in that:
one side of the probe main body 2, which is positioned outside the hearth 3, is connected with a fire detection cooling air pipe 4, the fire detection cooling air pipe 4 is obliquely arranged towards the furnace wall 1, and an included angle alpha between the axis of the fire detection cooling air pipe 4 and the axis of the probe main body 2 is 30-45 degrees;
the fire detection cooling air pipe 4 is communicated with the probe main body 2 and is used for filling cooling air into the air pipe to cool the lens assembly;
a rear cover 24 is fixed at the rear end of the probe body 2, the rear cover 24 is arranged right opposite to the UV photosensitive tube 22 and the probe circuit board 23, a junction box cavity 25 is arranged between the rear cover 24 and the probe circuit board 23, a hose 5 is connected between the rear cover 24 and the fire detection cooling air pipe 4, and the hose 5 is a PU (polyurethane) pipe so as to introduce cooling air into the rear end of the probe to cool the photosensitive tube and the circuit board;
one end of the hose 5 is connected with the fire detection cooling air pipe 4 through a first quick-connection-peg 6, and the other end is connected with the rear cover 24 through a second quick-connection-peg 7;
the first quick-plug connector 6 is arranged close to the joint of the fire detection cooling air pipe 4 and the probe main body 2, and the second quick-plug connector 7 is connected to the middle upper part of the rear cover 24.
As shown in figure 1, the fire detection cooling air enters from the inlet of the fire detection cooling air pipe 4 and blows into the hearth along the probe body 2 for cooling the lens assembly 21, the furnace wall becomes thin due to long-term combustion at the position of the boiler burner, the temperature of the fire detection surrounding environment near the burner is very high, the temperature of the probe circuit board 23 and the UV photosensitive tube 22 at the rear part of the probe is high due to the influence of heat radiation of the surrounding furnace wall, and the UV tube is aged quickly and the sensitivity is reduced. Consequently, examine cooling air of cooling air duct 4 with the fire and draw branch pipe to the probe tail end all the way, cover a tapping installation quick connector behind, examine also drilling installation quick connector on cooling air duct 4 at the fire, the centre links to each other with the PU pipe for in cooling air direct introduction fire examined the terminal box of afterbody, give the light sensitive tube cooling specially. The method can be used for carrying out small modification on the fire detector before installation and then directly installing the fire detector on site.
After the device is used, the fire detection failure rate and the temperature in the probe junction box are obviously reduced, and the replacement frequency of the probe is reduced to one in half a year from one in month; the fault of closing the gas quick-switching valve caused by fire detection is also reduced, the operation efficiency of the boiler is improved, and the effect is very obvious.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides an improve device of power plant gas boiler flame detection probe sensitivity, is including being fixed in probe main part (2) on brickwork (1), the front end of probe main part (2) stretches into in furnace (3) and is equipped with lens subassembly (21), and the rear end of probe main part (2) is equipped with UV photosensitive tube (22) and probe circuit board (23), its characterized in that:
one side of the probe main body (2) positioned outside the hearth (3) is connected with a fire detection cooling air pipe (4), and the fire detection cooling air pipe (4) is communicated with the probe main body (2);
a rear cover (24) is fixed at the rear end of the probe main body (2), the rear cover (24) is arranged right opposite to the UV photosensitive tube (22) and the probe circuit board (23), a junction box cavity (25) is arranged between the rear cover (24) and the probe circuit board (23), and a hose (5) is connected between the rear cover (24) and the fire detection cooling air pipe (4).
2. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 1, wherein:
the fire detection cooling air pipe (4) is obliquely arranged towards the furnace wall (1), and an included angle alpha between the axis of the fire detection cooling air pipe (4) and the axis of the probe main body (2) is an acute angle.
3. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 2, wherein:
an included angle alpha between the axis of the fire detection cooling air pipe (4) and the axis of the probe main body (2) is 30-45 degrees.
4. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 1 or 2, wherein:
one end of the hose (5) is connected with the fire detection cooling air pipe (4) through a first quick connector (6), and the other end of the hose is connected with a rear cover (24) through a second quick connector (7).
5. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 4, wherein:
the first quick-connection connector (6) is arranged close to the joint of the fire detection cooling air pipe (4) and the probe main body (2).
6. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 4, wherein:
the second quick connector (7) is connected to the middle upper part of the rear cover (24).
7. The device for improving the sensitivity of the flame detection probe of the gas boiler of the power plant as claimed in claim 1 or 2, wherein:
the hose (5) is a PU pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369424.1A CN114034059A (en) | 2021-11-18 | 2021-11-18 | Device for improving sensitivity of flame detection probe of gas boiler in power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111369424.1A CN114034059A (en) | 2021-11-18 | 2021-11-18 | Device for improving sensitivity of flame detection probe of gas boiler in power plant |
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| Publication Number | Publication Date |
|---|---|
| CN114034059A true CN114034059A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111369424.1A Pending CN114034059A (en) | 2021-11-18 | 2021-11-18 | Device for improving sensitivity of flame detection probe of gas boiler in power plant |
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| CN (1) | CN114034059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777844A (en) * | 2022-04-28 | 2022-07-22 | 陈松涛 | Fixed bed gasification furnace detection device and fixed bed gasification furnace detection method |
-
2021
- 2021-11-18 CN CN202111369424.1A patent/CN114034059A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777844A (en) * | 2022-04-28 | 2022-07-22 | 陈松涛 | Fixed bed gasification furnace detection device and fixed bed gasification furnace detection method |
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