CN-122015113-A - Installation and debugging device and debugging method for fire detection of thermal power plant

CN122015113ACN 122015113 ACN122015113 ACN 122015113ACN-122015113-A

Abstract

The application relates to the technical field of installation and debugging of equipment in a thermal power plant, in particular to an installation and debugging device and a debugging method for fire detection in the thermal power plant, wherein the installation and debugging device for the fire detection in the thermal power plant comprises a fire detection probe assembly, a fire detection probe body and an installation sleeve, and an extension sleeve is connected to the front end of the installation sleeve; the horizontal calibration assembly comprises a first light emitting device and a horizontal calibration sleeve, wherein the first light emitting device is used for emitting calibration light beams to guide the horizontal calibration sleeve to be aligned with the burner nozzle, and the axis of the extension sleeve coincides with the detection line of the fire detection probe. According to the application, the movable horizontal reference is established on the central axis of the boiler, and a space intersection point is formed between the movable horizontal reference and the detection sight line of the fire detection probe, so that the aim of the fire detection probe is changed from 'fuzzy alignment' depending on experience to 'precise alignment' based on the geometric reference, the probe is ensured to be always aligned to a stable combustion zone with highest flame intensity, and the problems of weak signal and false alarm caused by the elongation of a black dragon zone are fundamentally solved.

Inventors

WEN BING
WANG QUANKANG
LI XIAOSHU
ZHANG QUANYUAN
HU TIANHAO
LI HUA
LIU SHENGQING
GUO SHENGFA
GUO TONG

Assignees

华能秦煤瑞金发电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20251218

Claims (10)

1. Installation debugging device is examined to thermal power plant's fire, a serial communication port, include: The fire detection probe assembly comprises a fire detection probe body (1) and a mounting sleeve (7), wherein the front end of the mounting sleeve (7) is connected with an extension sleeve (2); -a horizontal calibration assembly comprising a first light emitting device (3) and a horizontal calibration sleeve (4), the first light emitting device (3) for emitting a calibration beam directing the horizontal calibration sleeve (4) towards a burner spout (5); The axis of the extension sleeve (2) coincides with the detection sight line of the fire detection probe body (1), and the length of the extension sleeve (2) can be adjusted along the axial direction of the extension sleeve so as to be matched with the horizontal calibration sleeve (4) to determine the installation angle of the fire detection probe body (1).
2. The fire detection installation and debugging device of a thermal power plant according to claim 1, wherein the installation sleeve (7) is detachably arranged at the front end of the fire detection probe body (1), and a second light-emitting device (8) is further arranged inside the installation sleeve (7).
3. A fire detection installation and adjustment device of a thermal power plant according to claim 2, characterized in that the second lighting means (8) are adapted to emit an angle-collimated light beam, which coincides with the axis of the extension sleeve (2).
4. A fire detection, installation and debugging device for a thermal power plant according to claim 3, further comprising an extensible bracket, wherein the first light emitting device (3) is installed inside a boiler through the extensible bracket, and the extensible bracket can drive the first light emitting device (3) to rotate around the central axis of the boiler or lift along the central axis of the boiler.
5. The fire detection installation and debugging device of a thermal power plant according to claim 4, characterized in that the horizontal calibration sleeve (4) comprises: A base barrel section, one end of which is horizontally connected with the first light-emitting device (3); The splicing barrel section is at least provided with one splicing barrel section, and the splicing barrel section is detachably connected with the other end of the basic barrel section; The horizontal calibration sleeve can adjust the whole length by increasing or decreasing or replacing splicing barrel sections with different lengths.
6. The fire detection, installation and debugging device of a thermal power plant according to claim 5, characterized in that the length of the basic cylinder section is less than or equal to the distance from the end of the flame burn-out zone to the first lighting device (3) under standard conditions; The whole length adjustable range of the horizontal calibration sleeve (4) is as follows: The integral length of the horizontal calibration sleeve (4) is smaller than or equal to the distance from the center of the stable combustion area to the first light-emitting device (3), and the horizontal calibration sleeve (4) is larger than the distance from the starting end of the combustion area to the light beam emitting end of the second light-emitting device (8).
7. The fire detection installation and debugging device of a thermal power plant according to claim 6, wherein the installation angle of the fire detection probe body (1) is determined by adjusting the pitching angle, so that the outer surface of the extension sleeve (2) is contacted with the end part of the horizontal calibration sleeve (4) or the angle calibration light beam is focused on the end part of the horizontal calibration sleeve (4).
8. The fire detection installation and adjustment device of a thermal power plant according to claim 1, characterized in that the extension sleeve (2) and/or the horizontal calibration sleeve (4) are made of a lightweight refractory material.
9. A thermal power plant fire detection installation and debugging method based on the thermal power plant fire detection installation and debugging device as claimed in any one of claims 1-8, comprising: mounting a first light emitting device (3) at the central axis of the boiler, and emitting a horizontal calibration beam; directing a horizontal alignment sleeve (4) through a horizontal alignment beam towards a target burner spout (5); Installing a fire detection probe body (1), connecting an extension sleeve (2) with the front end of the fire detection probe body (1), and adjusting the length of the extension sleeve (2); Adjusting the pitching angle of the fire detection probe body (1) to enable the extension sleeve (2) to be in contact with the end part of the horizontal calibration sleeve (4) or enable the angle calibration light beam to be focused on the end part of the horizontal calibration sleeve; and fixing the fire detection probe body (1) to finish installation and debugging.
10. The fire detection installation and debugging method of a thermal power plant according to claim 9, further comprising adjusting the overall length of the horizontal calibration sleeve (4) according to the type of coal so that the detection line of sight of the fire detection probe body (1) can be focused at a position corresponding to a flame stable combustion zone.

Description

Installation and debugging device and debugging method for fire detection of thermal power plant Technical Field The application relates to the technical field of installation and debugging of equipment in a thermal power plant, in particular to an installation and debugging device and a debugging method for fire detection in the thermal power plant. Background In the boiler operation process of a thermal power plant, flame detection is a key link for guaranteeing the safety of a hearth and is used for monitoring the existence and the intensity of flames of a burner in the hearth in real time, once flameout is detected, a system must immediately trigger a shutdown (namely 'brake-off') to cut off fuel supply so as to prevent fuel from accumulating in the hearth to cause malignant accidents such as deflagration and the like, and therefore a flame detection probe must always aim at a flame combustion area to acquire a reliable flame signal, and abnormal brake-off of the boiler due to flameout misjudgment is avoided. In a thermal power plant, safe and stable operation of a boiler is important. However, the actual operation condition of the boiler often deviates from the design condition, the actual burning coal type of the boiler often deviates from the design and checking coal type, when the burning coal type changes, the combustion condition inside the burner of the hearth also changes, for example, a thermal power plant in actual operation often needs to use inferior pulverized coal or mixed combustion coal as fuel, and a black dragon region (a coal dust enrichment region which is not completely combusted) of flame during the combustion of such fuel can be obviously prolonged, so that the sight of a visible light fire detection probe installed according to the traditional procedure is easily concentrated at the front end part of the black dragon region or an initial combustion region. Because the flame intensity of the area is extremely weak, the fire detection system is easy to be misjudged that 'no fire is found', the emergency shutdown protection of the boiler is triggered, the power generation continuity is affected, and the deflagration risk is possibly caused because fuel continuously enters the hearth. In addition, the installation and debugging of the existing fire detection mostly depend on manual experience to adjust the angle and the position of the fire detection, and a special positioning device is lacked, so that the installation accuracy is low, the debugging period is long, and the working condition requirements of different coal types and different burner structures are difficult to adapt. Therefore, a fire detection installation and debugging device and method capable of accurately positioning a flame combustion area and adapting to multiple working conditions are needed, and the technical problems of poor reliability of fire detection signals and low debugging efficiency in the prior art are solved. Disclosure of Invention The application provides a device and a method for installing and debugging fire inspection of a thermal power plant, which are used for solving the problems that the existing fire inspection installation and debugging mostly depend on manual experience, and a special positioning device is lacked, so that the installation accuracy is low, the debugging period is long, and misjudgment of 'no fire' is easy to occur. The application provides a thermal power plant fire detection installation and debugging device, which comprises: the fire detection probe assembly comprises a fire detection probe body and a mounting sleeve, wherein the front end of the mounting sleeve is connected with an extension sleeve; a horizontal calibration assembly comprising a first light emitting device for emitting a calibration beam to direct the horizontal calibration sleeve toward a burner orifice and a horizontal calibration sleeve; The axis of the extension sleeve coincides with the detection sight line of the fire detection probe body, and the extension sleeve can adjust the length of the extension sleeve along the axial direction of the extension sleeve so as to be matched with the horizontal calibration sleeve to determine the installation angle of the fire detection probe body. Preferably, the mounting sleeve is detachably arranged at the front end of the fire detection probe body, and a second light-emitting device is further arranged in the mounting sleeve. Preferably, the second light emitting device is configured to emit an angularly collimated light beam, the angularly collimated light beam coinciding with the axis of the extension sleeve. Preferably, the boiler further comprises an extensible support, the first light emitting device is installed inside the boiler through the extensible support, and the extensible support can drive the first light emitting device to rotate around the central axis of the boiler or lift along the central axis of the boiler. Preferably, the horizontal ca