A steam sootblower monitoring device and system for a thermal power plant

Abstract

The utility model discloses a kind of steam soot blower monitoring devices and systems of thermal power plant.The device includes multiple temperature measuring elements, each temperature measuring element includes: clamp, locking device, installation cylinder;The clamp specifically includes first clasp, second clasp, one end of the first clasp and second clasp is rotatably connected by hinge, the other end of first clasp and second clasp all exist 'concave' shape protrusion, 'concave' shape protrusion and locking device constitute limiting mechanism, the lower end of the clamp is fixedly connected with the upper end of installation cylinder;The inside of installation cylinder is provided with temperature probe, and the upper end of temperature probe passes through clamp.The utility model is fixed on specific pipeline by clamp, whether valve is closed completely can be monitored, whether there is soot blowing steam leakage, ensure that heating tube of furnace is safely and reliably operated, strengthen the state of soot blowing system valve, strengthen the safety technical management of unit operation, reduce manpower cost, ensure unit safe operation.

Description

Technical Field

[0001] This utility model relates to the field of coal-fired power generation technology, specifically to a monitoring device and system for steam soot blowers in thermal power plants. Background Technology

[0002] Guided by the dual-carbon goals, the construction of new power systems has enabled the large-scale integration of renewable energy into the grid. To mitigate the significant fluctuations in renewable energy generation and absorb more renewable energy, utilizing coal-fired power units for grid peak shaving and frequency regulation to ensure the reliability of the power supply system is particularly important. Coal-fired power units require pulverized coal to burn in the boiler furnace, heating the working fluid to generate steam that drives the turbine, which in turn drives the generator to produce electricity. The flue gas produced after pulverized coal combustion carries fly ash, and some of this dust accumulates on the heating surfaces as it flows through the flue. For example, a 300MW boiler can generate 700–1200 tons of fly ash per day (depending on the ash content of the coal). After fly ash flows through the convective heating surfaces of the boiler, such as the superheater, reheater, economizer, and water-cooled walls (four tubes), some of it deposits on these surfaces in various forms, causing fouling and ash accumulation. This increases heat transfer resistance and generates high-temperature flue gas. The consequences range from affecting normal boiler operation and reducing power generation efficiency to causing load reductions or even unplanned shutdowns, directly jeopardizing boiler safety and unit availability. To effectively remove ash accumulation on the heating surfaces, improve furnace heat absorption efficiency, and reduce flue gas temperature, power plants typically equip each heating surface of the boiler in thermal power units with soot blowers.

[0003] However, because the sootblower lifting valve operates outdoors for extended periods, it is prone to corrosion and internal leakage, leading to severe damage to the boiler's water-cooled walls and impacting the boiler's safe and stable operation. Currently, inspections are conducted manually and periodically using infrared thermometers, which does not provide real-time online monitoring or alarm functionality.

[0004] Currently, temperature monitoring in the OVATION control system can be done remotely. For example, a 300MW boiler has 66 soot blowing guns in the furnace, 68 temperature measuring points in the superheater and economizer, and 5 temperature measuring points in the drain valve, requiring the monitoring of 139 temperatures. Using the existing method results in a large amount of engineering work and high costs. Utility Model Content

[0005] To solve the above problems, this utility model provides a monitoring device for steam soot blowers in thermal power plants, including multiple temperature measuring elements, each of which includes: a clamp, a locking device, and a mounting cylinder; The clamp specifically includes a first retaining ring and a second retaining ring. One end of the first retaining ring and the second retaining ring are rotatably connected by a hinge. The other end of the first retaining ring and the second retaining ring both have a concave protrusion. The concave protrusion and the locking device constitute a limiting mechanism. The lower end of the clamp is fixedly connected to the upper end of the mounting cylinder. A temperature probe is provided on the inner side of the mounting cylinder. The upper end of the temperature probe passes through the clamp and forms a small protrusion on the inner side of the clamp.

[0006] Furthermore, the locking device specifically includes: a locking bolt and a knob nut; The lower end of the locking bolt is rotatably connected to the concave protrusion of the second retaining ring, and the middle part of the locking bolt passes through the concave protrusion of the first retaining ring; the knob nut is fixedly mounted on the locking bolt, and its lower end is tightly connected to the concave protrusion of the first retaining ring.

[0007] Furthermore, the upper end of the knob nut has multiple anti-slip protrusions.

[0008] Furthermore, the lower end of the mounting cylinder is provided with a compression fitting for transmitting the detected temperature data to the outside.

[0009] Furthermore, the mounting cylinder has a through hole in the middle for placing a temperature probe, and the inner diameter of the through hole is 10mm.

[0010] Furthermore, when the clamp is tightened, an elliptical hole is formed between the first and second retaining rings, the vertical diameter of which is 72mm and the horizontal diameter of which is 78mm.

[0011] A monitoring system for steam soot blowers in thermal power plants includes a monitoring device for steam soot blowers, multiple data acquisition cards, and a remote temperature monitoring system. The monitoring device for steam soot blowers has 139 temperature measuring elements and 7 data acquisition cards. The temperature measuring elements are installed at temperature measuring points on the steam soot blowers and are connected to the 7 data acquisition cards respectively. The detected temperature data is uploaded to the remote temperature monitoring system through the data acquisition cards.

[0012] Furthermore, the remote temperature monitoring system specifically includes: a data collection and processing module, an anomaly analysis module, and a data display and alarm module; the data collection and processing module is used to summarize and process the data transmitted by the data acquisition card; the anomaly analysis module is used to analyze the processed data and determine whether there is any abnormal data; the data display and alarm module is used to display the collected and processed data according to the temperature measurement point of the corresponding temperature measuring element and to issue an alarm for abnormal data.

[0013] This utility model provides a monitoring device and system for steam soot blowers in thermal power plants, which has the following beneficial effects: This utility model uses clamps to fix it on a specific pipeline and adds temperature measuring points after the valves of the soot blowing system and the soot blowing gun. It can monitor whether the valves are completely closed and whether there is any leakage of soot blowing steam, ensuring the safe and reliable operation of the furnace heating tubes, strengthening the status of the valves in the soot blowing system, strengthening the safety technical management of the unit operation, reducing labor costs, and ensuring the safe operation of the unit. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the device structure provided by this utility model; Figure 2 A top view of the concave-shaped protrusions on the first and second retaining rings provided by this utility model; Figure 3 A schematic diagram of the system structure provided by this utility model.

[0016] In the diagram, 1. Locking device, 2. Mounting cylinder, 3. First retaining ring, 4. Second retaining ring, 5. Temperature probe, 6. Locking bolt, 7. Knob nut, 8. Compression fitting, 9. Temperature sensing element, 10. Temperature acquisition card, 11. Data collection and processing module, 12. Anomaly analysis module, 13. Data display and alarm module. Detailed Implementation

[0017] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] The following detailed description of the implementation method of this utility model is provided in conjunction with the accompanying drawings. The description only covers some embodiments and not all embodiments. For clarity, representations and descriptions unrelated to this utility model are omitted from the drawings and description.

[0019] To provide a clearer understanding of the technical features, objectives, and beneficial effects of this utility model, the following detailed description of the technical solution is provided. Obviously, the described embodiments are only a portion of the embodiments of this utility model, not all of them, and should not be construed as limiting the scope of implementation of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 , Figure 2 As shown, this utility model provides a monitoring device for a steam soot blower in a thermal power plant, including multiple temperature measuring elements 9, each of which includes: a clamp, a locking device 1, and a mounting cylinder 2.

[0021] The clamp specifically includes a first retaining ring 3 and a second retaining ring 4. One end of the first retaining ring 3 and the second retaining ring 4 are rotatably connected by a hinge. The other end of the first retaining ring 3 and the second retaining ring 4 both have a concave protrusion. The concave protrusion and the locking device 1 constitute a limiting mechanism. The lower end of the clamp is fixedly connected to the upper end of the mounting cylinder 2. A temperature probe 5 is provided on the inner side of the mounting cylinder 2. The upper end of the temperature probe 5 passes through the clamp and forms a small protrusion on the inner side of the clamp.

[0022] The locking device specifically includes: a locking bolt 6 and a knob nut 7; the lower end of the locking bolt 6 is rotatably connected to a concave protrusion of the second retaining ring 4, and the middle part of the locking bolt 6 passes through a concave protrusion of the first retaining ring 3; the knob nut 7 is fixedly mounted on the locking bolt 6, and its lower end is tightly connected to a concave protrusion of the first retaining ring 3. The upper end of the knob nut 7 has multiple anti-slip protrusions.

[0023] The lower end of the mounting cylinder 2 is equipped with a compression fitting 8 for transmitting the detected temperature data to the outside. A through hole with an inner diameter of 10mm is located in the middle of the mounting cylinder 2 for housing the temperature probe 5.

[0024] When the clamp is tightened, an elliptical hole is formed between the first retaining ring 3 and the second retaining ring 4. The vertical diameter of the elliptical hole is 72mm and the horizontal diameter of the elliptical hole is 78mm.

[0025] When performing temperature detection, the aforementioned device is secured to the circular pipe by the first retaining ring 3 and the second retaining ring 4, and fixed by the locking device 1. The temperature probe 5 inside the retaining ring will be in close contact with the pipe surface to measure the temperature.

[0026] A monitoring system for steam soot blowers in thermal power plants, such as Figure 3 As shown, the device includes a monitoring device for a steam soot blower in a thermal power plant, multiple data acquisition cards 10, and a remote temperature monitoring system. The monitoring device for the steam soot blower in a thermal power plant has 139 temperature measuring elements 9 and 7 data acquisition cards 10. The temperature measuring elements 9 are installed at temperature measuring points on the steam soot blower in the thermal power plant and are connected to the 7 data acquisition cards 10 respectively. The detected temperature data is uploaded to the remote temperature monitoring system through the data acquisition cards 10.

[0027] The remote temperature monitoring system specifically includes: a data collection and processing module 11, an anomaly analysis module 12, and a data display and alarm module 13; the data collection and processing module 11 is used to summarize and process the data transmitted by the data acquisition card; the anomaly analysis module 12 is used to analyze the processed data and determine whether there is abnormal data; the data display and alarm module 13 is used to display the collected and processed data according to the temperature measuring point of the corresponding temperature measuring element 9, and to issue an alarm for abnormal data.

[0028] Temperature data is collected by installing seven Hollysys data acquisition cards on-site and communicating with the DCS communication card in the OVATION DCS control system (i.e., remote temperature monitoring system). By building a data communication network and configuring the OVATION DCS control system logic screen, the measured values ​​of 139 temperature elements are displayed on the OVATION system screen. The screen display is enhanced, and alarm light signs are added. The temperature abnormality light signs alarm, and operation and maintenance personnel can promptly detect the leakage of evaporation into the furnace during soot blowing and after the soot blowing gun is withdrawn, and eliminate safety hazards, thereby improving the safety of the unit.

[0029] 139 temperature measurement points are connected to 7 Hollysys data acquisition cards. The station address is set as follows: when the K-SRT01 is used as an IO-BUS slave, the address range is 10~109; when used as a Modbus slave, the address range is 1~127. This is set using the first 7 bits of the station address DIP switch. The 7 DIP switches combine to form a binary number, and the corresponding decimal number is the station address. The first bit is the least significant bit, and the seventh bit is the most significant bit.

[0030] Decimal station address = K7 * 2 6 +K6*2 5 +K5*2 4 +K4*2 3 +K3*2 2 +K2*2 1 +K1*2°; where Ki=0 indicates that the i-th DIP switch is turned to the ON position, and Ki=1 indicates that the i-th DIP switch is turned to the OFF position (i:0~7).

[0031] This utility model uses clamps to fix it on a specific pipeline and adds temperature measuring points after the valves of the soot blowing system and the soot blowing gun. It can monitor whether the valves are completely closed and whether there is any leakage of soot blowing steam, ensuring the safe and reliable operation of the furnace heating tubes, strengthening the status of the valves in the soot blowing system, strengthening the safety technical management of the unit operation, reducing labor costs, and ensuring the safe operation of the unit.

[0032] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be modified within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A monitoring device for a steam soot blower in a thermal power plant, comprising multiple temperature sensing elements (9), characterized in that, Each temperature sensing element (9) includes: a clamp, a locking device (1), and a mounting cylinder (2); The clamp specifically includes a first retaining ring (3) and a second retaining ring (4). One end of the first retaining ring (3) and the second retaining ring (4) are rotatably connected by a hinge. The other end of the first retaining ring (3) and the second retaining ring (4) both have a concave protrusion. The concave protrusion and the locking device (1) constitute a limiting mechanism. The lower end of the clamp is fixedly connected to the upper end of the mounting cylinder (2). A temperature probe (5) is provided on the inner side of the mounting cylinder (2). The upper end of the temperature probe (5) passes through the clamp and forms a small protrusion on the inner side of the clamp.

2. The monitoring device for steam soot blowers in thermal power plants according to claim 1, characterized in that, The locking device specifically includes: a locking bolt (6) and a knob nut (7). The lower end of the locking bolt (6) is rotatably connected to the concave protrusion of the second retaining ring (4), and the middle part of the locking bolt (6) passes through the concave protrusion of the first retaining ring (3); the knob nut (7) is fixedly mounted on the locking bolt (6), and its lower end is tightly connected to the concave protrusion of the first retaining ring (3).

3. The monitoring device for steam soot blowers in thermal power plants according to claim 2, characterized in that, The upper end of the knob nut (7) has multiple anti-slip protrusions.

4. The monitoring device for steam soot blowers in thermal power plants according to claim 1, characterized in that, The lower end of the mounting cylinder (2) is provided with a compression fitting (8) for transmitting the detected temperature data to the outside.

5. The monitoring device for steam soot blowers in thermal power plants according to claim 4, characterized in that, The mounting cylinder (2) has a through hole in the middle for placing a temperature probe (5), and the inner diameter of the through hole is 10 mm.

6. The monitoring device for steam soot blowers in thermal power plants according to claim 1, characterized in that, When the clamp is locked, an elliptical hole is formed between the first retaining ring (3) and the second retaining ring (4). The vertical diameter of the elliptical hole is 72 mm and the horizontal diameter of the elliptical hole is 78 mm.

7. A monitoring system for steam soot blowers in thermal power plants, characterized in that, Includes the steam soot blower monitoring device for thermal power plants as described in any one of claims 1 to 6, multiple data acquisition cards (10), and a remote temperature monitoring system; The temperature measuring element (9) of the monitoring device for the steam soot blower in the thermal power plant is specifically 139, and the data acquisition card (10) is specifically 7. The temperature measuring element (9) is installed at the temperature measuring point on the steam soot blower in the thermal power plant and connected to the 7 data acquisition cards (10) respectively. The detected temperature data is uploaded to the remote temperature monitoring system through the data acquisition card (10).

8. The monitoring system for steam soot blowers in thermal power plants according to claim 7, characterized in that, The remote temperature monitoring system specifically includes: a data collection and processing module (11), an anomaly analysis module (12), and a data display and alarm module (13). The data collection and processing module (11) is used to summarize and process the data transmitted by the data acquisition card; The anomaly analysis module (12) is used to analyze the processed data and determine whether there is any abnormal data. The data display and alarm module (13) is used to display the collected and processed data according to the temperature measurement point of the corresponding temperature measuring element, and to alarm for abnormal data.

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