Fault monitoring system for turbulent burner

Abstract

The utility model provides a fault monitoring system for a turbulent burner. The fault monitoring system comprises a hot wire probe, a base, a thermocouple and a main control module, one end of the hot wire probe penetrates into the combustor cavity, and the other end of the hot wire probe is connected with the signal transmitter; the base is fixedly arranged on the peripheral wall of the combustor cavity, the thermocouple is arranged outside the combustor cavity, and the thermocouple is connected with the base through an elastic element; and the main control module is electrically connected with the thermocouple and the signal transmitter respectively, and is used for monitoring and displaying feedback signals of the thermocouple and the hot wire probe. According to the utility model, the operation condition of the turbulent burner is judged through feedback signals of the hot wire probe and the thermocouple displayed by the main control module, so that faults in the turbulent burner can be quickly found.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial pulverized coal boilers, and in particular relates to a fault monitoring system for a swirl burner. Background Art

[0002] The burner is an important part of the pulverized coal boiler. The pulverized coal and the air required for its combustion enter the furnace through the burner. The burner can correctly control the pulverized coal airflow, promote good mixing of coal and air, and ensure that the pulverized coal ignites and burns out quickly and stably. The burner of the front and rear wall counter-combustion boiler is often selected as a swirl burner. The swirl burner is equipped with several swirl generators. The pulverized coal airflow or hot air will rotate when passing through the swirl generator, and a swirl jet will be formed after it is ejected from the nozzle. The swirl jet at the outlet can form a high-temperature flue gas reflow zone that is conducive to ignition, and make the airflow strongly mixed, which is conducive to the combustion of pulverized coal. In the actual operation of power station boilers, swirl burners often have burnout, coking and blockage due to changes in coal types, insufficient central air volume, poor primary air rigidity, excessive swirl intensity, and overheating of the burner tube wall. Once the burner has burnout, coking and other faults, it will not only interfere with the mixing of pulverized coal and air, but also easily destroy the balance of combustion conditions in the furnace, thereby affecting the safe and stable operation of the boiler. Therefore, being able to quickly and accurately determine that a swirl burner has failed, take appropriate measures, and deal with the failure in a short period of time is of great significance to ensuring the normal operation of the power station boiler.

[0003] At present, thermal power units are deeply involved in grid peak regulation, with large load fluctuations, and most power plants lack effective monitoring of swirl burners, resulting in frequent swirl burner failures and difficulty in timely detection at the early stage of the failure. Therefore, fault monitoring of swirl burners is very necessary. Utility Model Content

[0004] In order to solve the problem described in the background technology that most power plants lack effective monitoring of swirl burners, resulting in frequent swirl burner failures and difficulty in timely detection at the early stage of failures, the utility model proposes the following technical solutions:

[0005] A fault monitoring system for a swirl burner comprises: a hot wire probe, a base, a thermocouple and a main control module; one end of the hot wire probe penetrates into a burner cavity, and the other end of the hot wire probe is connected to a signal transmitter; the base is fixedly arranged on the outer peripheral wall of the burner cavity, the thermocouple is arranged outside the burner cavity, and the thermocouple and the base are connected via an elastic element; the main control module is electrically connected to the thermocouple and the signal transmitter respectively, and the main control module is used to monitor and display feedback signals of the thermocouple and the hot wire probe.

[0006] Wherein, the base is arranged circumferentially on the outer wall of the burner cavity.

[0007] Furthermore, the hot wire probe enters the burner cavity along the radial direction of the burner cavity, and the hot wire probe is located between the furnace wall and the air inlet.

[0008] Furthermore, the base is arranged on the inner wall of the burner cavity close to the furnace wall, and the base is in the shape of an arc plate.

[0009] Furthermore, the air inlet includes: a primary air inlet and a central air inlet, the lower half of the circumference of one end of the burner cavity is connected to the primary air inlet, and the upper half of the circumference of one end of the burner cavity is connected to the central air inlet; the hot wire probe is located on the side of the burner cavity where the central air inlet is located.

[0010] Beneficial effects: The utility model determines the operating condition of the swirl burner through the feedback signals of the hot wire probe and the thermocouple displayed by the main control module, thereby quickly discovering the fault in the swirl burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a fault monitoring system for a swirl burner according to an embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the installation structure of a thermocouple according to an embodiment of the utility model. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0015] Figure 1 The figure is a schematic structural diagram of a fault monitoring system for a swirl burner according to an embodiment of the utility model.

[0016] Reference Figure 1According to an embodiment of the utility model, a fault monitoring system for a swirl burner includes: a hot wire probe 1, a base 2, a thermocouple 3 and a main control module 4. One end of the hot wire probe 1 penetrates into the burner cavity, and the other end of the hot wire probe 1 is connected to the signal transmitter 5. The base 2 is fixed on the outer peripheral wall of the burner cavity, the thermocouple 3 is arranged outside the burner cavity, and the thermocouple 3 and the base 2 are connected through an elastic element 6. The main control module 4 is arranged outside the burner cavity, and the main control module 4 is connected to the thermocouple 3 and the signal transmitter 5 respectively. The main control module 4 is used to monitor and display the feedback signals of the thermocouple 3 and the hot wire probe 1.

[0017] Figure 2 It is a schematic diagram of the installation structure of the thermocouple 3 according to the embodiment of the utility model.

[0018] Reference Figure 2 Specifically, each base 2 is in the shape of an arc-shaped plate as a whole, and on the end surface of the burner cavity, each base 2 is coaxial with the burner cavity. Each base 2 is on the outer peripheral wall of the burner cavity close to the furnace wall 7, and each base 2 is arranged circumferentially on the outer peripheral surface of the burner cavity. Preferably, the center of the circle formed by each base 2 is at the same point. The hot wire probe 1 needs to penetrate into the burner cavity along the radial direction of the burner cavity, so as to monitor the gas flow rate in the burner cavity and feed back the measured structure to the main control module 4. Among them, the elastic element 6 includes but is not limited to high-temperature resistant elastic materials such as springs with certain heat resistance.

[0019] Specifically, the air inlet 8 includes: a primary air inlet 81 and a central air inlet 82. The lower half of one end of the burner cavity is connected to the primary air inlet 81, and the upper half of one end of the burner cavity is connected to the central air inlet 82. The hot wire probe 1 is located on the side of the burner cavity close to the central air inlet 82. In this embodiment, the primary air inlet 81 is located on the lower half of the circumference of the burner cavity away from the furnace wall 7, and the central air inlet 82 is located on the upper half of the circumference of the burner cavity away from the furnace wall 7.

[0020] During the operation of the swirl burner, the feedback from the thermocouple 3 and the thermal conductivity probe is absorbed, analyzed and displayed by the main control module 4, and the operator can quickly judge the operating conditions inside the swirl burner through the various parameters displayed by the main control module 4. Preferably, in other embodiments, the entire system can also be additionally equipped with an alarm and an indicator light connected to the main control module 4, so as to further improve the judgment speed of the operator. Furthermore, the alarm or indicator light can also be set with different gradients of reminders according to the severity of the fault.

[0021] In summary, the utility model determines the operating condition of the swirl burner through the feedback signals of the hot wire probe and the thermocouple displayed by the main control module, thereby quickly discovering the fault in the swirl burner.

[0022] The above description is of certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0023] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0024] The optional implementation modes of the embodiments of the utility model are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the utility model, the technical scheme of the embodiments of the utility model can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the utility model.

[0025] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A fault monitoring system for a swirl burner, characterized in that: include: A hot wire probe (1), a plurality of bases (2), a plurality of thermocouples (3) and a main control module (4); one end of the hot wire probe (1) penetrates into the burner cavity, and the other end of the hot wire probe (1) is connected to a signal transmitter (5); each base (2) is fixedly arranged on the outer peripheral wall of the burner cavity, each thermocouple (3) is arranged outside the burner cavity, and the thermocouple (3) and the base (2) are connected via an elastic element (6); the main control module (4) is electrically connected to the thermocouple (3) and the signal transmitter (5), respectively, and the main control module (4) is used to monitor and display the feedback signals of each thermocouple (3) and the hot wire probe (1).

2. A fault monitoring system for a swirl burner according to claim 1, characterized in that: Each of the bases (2) is arranged in the circumferential direction of the outer wall of the burner cavity.

3. A fault monitoring system for a swirl burner according to claim 1, characterized in that: The hot wire probe (1) enters the burner cavity along the radial direction of the burner cavity, and the hot wire probe (1) is located between the furnace wall (7) and the air inlet (8).

4. A fault monitoring system for a swirl burner according to claim 3, characterized in that: Each of the bases (2) is arranged on the outer peripheral wall of the burner cavity on one side close to the furnace wall (7), and each of the bases (2) is in the shape of an arc-shaped plate.

5. A fault monitoring system for a swirl burner according to claim 3, characterized in that: The air inlet (8) comprises: a primary air inlet (81) and a central air inlet (82); the lower half of one end of the burner cavity is connected to the primary air inlet (81), and the upper half of one end of the burner cavity is connected to the central air inlet (82); the hot wire probe (1) is located on the side of the burner cavity where the central air inlet (82) is located.

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