A clogging ash alarm recognition system and method for a thermal power plant ash bin

Abstract

The present invention discloses a system and method for ash hopper plugging alarm recognition in a thermal power plant, which relates to the technical field of automatic control in thermal power plants and includes: a temperature measuring mechanism arranged outside the ash hopper, comprising a plurality of thermal resistors, the thermal resistors are wound around the outer wall of the ash hopper in a ring shape, the ring-shaped thermal resistors are uniformly distributed in the vertical direction, and each thermal resistor is electrically connected to a temperature measuring instrument; a controller electrically connected to the output end of the temperature measuring instrument, the controller includes a data acquisition module for acquiring the temperature data measured by the temperature measuring instrument, and a data analysis module for analyzing whether the temperature difference value of different height sections of the ash hopper is normal, and sending an alarm signal when the temperature difference value is greater than the normal temperature difference value; this system can monitor the temperature of different height sections of the ash hopper in real time and calculate the temperature difference value between each pair of them, judge whether the ash hopper is plugged and the plugging position through the comparison of the temperature difference value, and send an alarm when plugged.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic control of thermal power plants, and more specifically, relates to a system and method for identifying ash hopper plugging alarms in thermal power plants. Background Art

[0002] At present, the vast majority of power plants use pneumatic ash conveying systems, which convey fine ash with compressed air as the medium. Due to various factors such as complex and variable ash content caused by blended coal combustion, mismatched gas-ash parameters, and high humidity of compressed air, ash hoppers in coal-fired power plants are prone to ash plugging. After ash plugging occurs, it directly affects the normal operation of the electrostatic precipitator equipment, causing tank collapse and even unit trip. At present, there is no device or system that can automatically monitor or identify the ash plugging phenomenon in thermal power plants, making it difficult to detect and handle ash plugging in ash hoppers in a timely manner, which causes great inconvenience to the normal operation of ash hoppers and electrostatic precipitator equipment. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a system and method for identifying ash hopper plugging alarms in thermal power plants, which can monitor the temperature at different height sections of the ash hopper in real time, calculate the temperature difference value, judge whether the ash hopper is plugged and the plugging position through the comparison of the temperature difference value, and issue an alarm when ash plugging occurs.

[0004] To achieve the above purpose, the present invention provides a system for identifying ash hopper plugging alarms in thermal power plants, which includes:

[0005] A temperature measuring mechanism, arranged outside the ash hopper, including a plurality of thermal resistors, the thermal resistors are wound around the outer wall of the ash hopper in a ring shape, the ring-shaped thermal resistors are evenly distributed in the vertical direction, and each thermal resistor is electrically connected to a temperature measuring instrument;

[0006] A controller, electrically connected to the output end of the temperature measuring instrument, the controller includes a data acquisition module for acquiring the temperature data measured by the temperature measuring instrument, and a data analysis module for analyzing whether the temperature difference value at different height sections of the ash hopper is normal, and issuing an alarm signal when the temperature difference value is greater than the normal temperature difference value.

[0007] Optionally, the thermal resistor is attached to the outer wall of the ash hopper with thermal conductive silicone grease.

[0008] Optionally, a heat preservation turn belt is wound outside the thermal resistor.

[0009] Optionally, the material of the heat preservation turn belt is nylon belt.

[0010] Optionally, the temperature measuring instrument is a multi-channel temperature measuring instrument, and each thermal resistor is connected to a temperature measuring channel.

[0011] Optionally, the data analysis module includes a temperature difference calculation unit and a temperature difference comparison unit.

[0012] Optionally, a protective relay is electrically connected to the output end of the data analysis module.

[0013] Optionally, an alarm component is electrically connected to the protective relay.

[0014] Optionally, the alarm component includes an alarm indicator light and a buzzer.

[0015] The present invention also provides a method for identifying ash hopper plugging alarms in thermal power plants. Using the above system, the method includes:

[0016] Step 1: Start the identification system. The temperature measuring instrument monitors the temperature values at different height sections on the outer wall of the ash hopper through multiple annular thermal resistors.

[0017] Step 2: The data acquisition module collects multiple temperature value data in the temperature measuring instrument and transmits the data to the data analysis module.

[0018] Step 3: The data analysis module calculates the temperature difference value between different height sections on the outer wall of the ash hopper through the internal temperature difference calculation unit and transmits the temperature difference value to the temperature difference comparison unit.

[0019] Step 4: The temperature difference comparison unit compares the temperature difference values at different heights on the outer wall of the ash hopper with the standard temperature difference range to determine whether the inside of the ash hopper is blocked. When the calculated temperature difference value is greater than the standard temperature difference value, an alarm signal is sent.

[0020] Step 5: When the protective relay receives the alarm signal, it controls the alarm indicator light to turn on, and at the same time the buzzer emits a beeping warning to remind the operator that the ash hopper is blocked. The plugging position can be determined according to the installation position of the thermal resistor corresponding to the excessive temperature difference value.

[0021] The present invention provides an ash hopper plugging alarm identification system and method for thermal power plants, and its beneficial effects are as follows: It has a temperature measuring mechanism, and the temperature values at different heights on the outer wall of the ash hopper are measured in real time through thermal resistors arranged at different heights on the outer wall of the hopper; it has a data analysis module, which can calculate the temperature difference value between different height sections on the outer wall of the ash hopper in real time and compare it with the standard temperature difference value to judge whether the ash hopper is blocked; by observing the installation positions of the two thermal resistors with excessive temperature difference values, the plugging position can be accurately judged, which is convenient for timely treatment.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0023] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0024] Figure 1 Shows a schematic structural diagram of a ash hopper plugging alarm recognition system for a thermal power plant according to an embodiment of the present invention.

[0025] Figure 2 Shows a schematic block diagram of a data analysis module of a ash hopper plugging alarm recognition system for a thermal power plant according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1, temperature measuring mechanism; 2, ash hopper; 3, thermal resistor; 4, temperature measuring instrument; 5, controller; 6, data acquisition module; 7, data analysis module; 8, heat preservation turn belt; 9, temperature difference calculation unit; 10, temperature difference comparison unit; 11, protection relay; 12, alarm component; 13, alarm indicator light; 14, buzzer. Detailed implementation manners

[0028] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0029] The present invention provides a ash hopper plugging alarm recognition system for a thermal power plant, and the system includes:

[0030] A temperature measuring mechanism, which is arranged outside the ash hopper and includes a plurality of thermal resistors. The thermal resistors are wound around the outer wall of the ash hopper in a ring shape, and the ring-shaped thermal resistors are evenly distributed in the vertical direction. Each thermal resistor is electrically connected to a temperature measuring instrument;

[0031] A controller, which is electrically connected to the output end of the temperature measuring instrument. The controller includes a data acquisition module for acquiring the temperature data measured by the temperature measuring instrument, and a data analysis module for analyzing whether the temperature difference value of different height sections of the ash hopper is normal, and sending an alarm signal when the temperature difference value is greater than the normal temperature difference value.

[0032] Specifically, the temperature measuring instrument monitors the temperature values of different height sections on the outer wall of the ash hopper through a plurality of thermal resistors. The data acquisition module can acquire the temperature data measured by the temperature measuring instrument and transmit the temperature data to the data analysis module. The data analysis module calculates the temperature difference values between different height sections of the ash hopper in real time, and can compare the calculated temperature difference values with the normal temperature difference values to judge whether the ash hopper is blocked. When the temperature difference value between the installation positions of a certain two thermal resistors is greater than 10°C, the data analysis module sends an alarm signal to indicate that the ash hopper is blocked, and the blocking position of the ash hopper can be judged through the installation positions of the two thermal resistors with the exceeded temperature difference value.

[0033] In one example, the thermal resistor is attached to the outer wall of the ash tank with thermal conductive silicone grease.

[0034] Specifically, the thermal conductive silicone grease has good thermal conductivity and certain adhesive properties, and can paste the thermal resistor on the outer wall of the ash tank, facilitating the measurement of the temperature at different height cross-section positions on the outer wall of the ash tank.

[0035] In one example, a heat insulation turn tape is wound around the outside of the thermal resistor.

[0036] Specifically, the heat insulation turn tape can further fix the thermal resistor, prevent the thermal resistor from being misaligned or falling off, and ensure the accuracy of temperature measurement.

[0037] In one example, the material of the heat insulation turn tape is a nylon tape. In other examples, the material of the heat insulation turn tape can also be a stainless steel tape or a PVC tape.

[0038] In one example, the temperature measuring instrument is a multi-channel temperature measuring instrument, and each thermal resistor is connected to a temperature measuring channel.

[0039] Specifically, the multi-channel temperature measuring instrument can facilitate the simultaneous measurement of the temperature values at multiple different height cross-section positions on the outer wall of the ash tank, and facilitate the data analysis module to calculate the temperature difference value between different height cross-section positions on the outer wall of the ash tank.

[0040] In one example, the data analysis module includes a temperature difference calculation unit and a temperature difference comparison unit.

[0041] Specifically, the temperature difference calculation unit can calculate the temperature difference value between different height cross-section positions on the outer wall of the ash tank, and the temperature difference comparison unit can compare the temperature difference value between different height cross-section positions on the outer wall of the ash tank with the standard temperature difference value, judge whether the ash tank is blocked by whether the temperature difference value exceeds the standard, and judge the blocking position of the ash tank through the installation positions of the two thermal resistors with the exceeded temperature difference value.

[0042] In one example, a protection relay is electrically connected to the output end of the data analysis module.

[0043] In one example, the protection relay is electrically connected to an alarm component.

[0044] In one example, the alarm component includes an alarm indicator light and a buzzer. In other examples, the alarm component can also be a signal transmitting device that can be connected to a mobile phone or a computer, and can communicate with the mobile phone or the computer to achieve the alarm function.

[0045] Specifically, when the temperature difference between the installation positions of two thermoresistors is greater than 10°C, the data analysis module sends an alarm signal to the protection relay. The protection relay controls the alarm indicator to light up, and at the same time, the buzzer emits a beeping alarm to remind the operator that the ash tank is blocked so that it can be processed in time.

[0046] The present invention also provides a method for identifying ash tank blockage alarm in a thermal power plant. Using the above system, the method includes:

[0047] Step 1: Start the identification system. The temperature measuring instrument monitors the temperature values at different height sections of the outer wall of the ash tank through multiple annular thermoresistors.

[0048] Step 2: The data acquisition module acquires multiple temperature value data in the temperature measuring instrument and sends the data to the data analysis module.

[0049] Step 3: The data analysis module calculates the temperature difference value between different height sections of the outer wall of the ash tank through the internal temperature difference calculation unit and sends the temperature difference value into the temperature difference comparison unit.

[0050] Step 4: The temperature difference comparison unit compares the temperature difference values at different heights of the outer wall of the ash tank with the standard temperature difference range to determine whether the inside of the ash tank is blocked. When the calculated temperature difference value is greater than the standard temperature difference value, an alarm signal is sent.

[0051] Step 5: When the protection relay receives the alarm signal, it controls the alarm indicator to light up, and at the same time, the buzzer emits a beeping warning to remind the operator that the ash tank is blocked. The ash blockage position can be determined according to the installation position of the thermoresistor corresponding to the excessive temperature difference value.

[0052] Embodiment

[0053] As Figure 1 and Figure 2 shown, the present invention provides an ash tank blockage alarm identification system for a thermal power plant. The system includes:

[0054] A temperature measuring mechanism 1, arranged outside the ash tank 2, includes multiple thermoresistors 3. The thermoresistors 3 are wound around the outer wall of the ash tank 2 in a ring shape. The annular thermoresistors 3 are evenly distributed in the vertical direction. Each thermoresistor 3 is electrically connected to a temperature measuring instrument 4.

[0055] A controller 5, electrically connected to the output end of the temperature measuring instrument 4. The controller 5 includes a data acquisition module 6 for acquiring the temperature data measured by the temperature measuring instrument 4, and a data analysis module 7 for analyzing whether the temperature difference value of different height sections of the ash tank 2 is normal. When the temperature difference value is greater than the normal temperature difference value, an alarm signal is sent.

[0056] In this embodiment, the thermoresistor 3 is attached to the outer wall of the ash tank through thermal conductive silicone grease.

[0057] In this embodiment, a heat preservation turn tape 8 is wound around the outside of the thermal resistor 3.

[0058] In this embodiment, the material of the heat preservation turn tape 8 is a nylon tape.

[0059] In this embodiment, the temperature measuring instrument 4 is a multi-channel temperature measuring instrument, and each thermal resistor 3 is connected to a temperature measuring channel.

[0060] In this embodiment, the data analysis module 7 includes a temperature difference calculation unit 9 and a temperature difference comparison unit 10.

[0061] In this embodiment, a protection relay 11 is electrically connected to the output end of the data analysis module 7.

[0062] In this embodiment, the protection relay 11 is electrically connected to an alarm component 12.

[0063] In this embodiment, the alarm component includes an alarm indicator light 13 and a buzzer 14.

[0064] The present invention also provides a method for identifying ash hopper plugging alarms in thermal power plants. Using the above system, the method includes:

[0065] Step 1: Start the identification system. The temperature measuring instrument 4 respectively monitors the temperature values of different height sections on the outer wall of the ash hopper 2 through multiple annular thermal resistors 3 uniformly distributed on the outer wall of the ash hopper 2 in the vertical direction.

[0066] Step 2: The data acquisition module 6 acquires the temperature value data of different height sections on the outer wall of the ash hopper 2 measured in the temperature measuring instrument 4, and conveys the temperature value data to the data analysis module 7 for analysis.

[0067] Step 3: The data analysis module 7 calculates the temperature difference values between different height sections on the outer wall of the ash hopper 2 in pairs through the internal temperature difference calculation unit 9 thereof, and conveys the temperature difference values to the temperature difference comparison unit 10.

[0068] Step 4: The temperature difference comparison unit 10 compares the temperature difference values between different height sections on the outer wall of the ash hopper 2 in pairs with the standard temperature difference value to determine whether the inside of the ash hopper 2 is blocked. When the calculated temperature difference value is greater than 10 °C, the data analysis module sends an alarm signal to the protection relay.

[0069] Step 5: When the protection relay 11 receives the alarm signal, it controls the alarm indicator light 13 to light up, and at the same time the buzzer 14 emits a buzzer warning to remind the operator that the ash hopper is blocked. The plugging position can be determined according to the installation positions of the two thermal resistors 3 corresponding to the excessive temperature difference value.

[0070] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for identifying ash hopper plugging alarms in a thermal power plant, using an ash hopper plugging alarm identification system in the thermal power plant, characterized in that, The system includes: A temperature measuring mechanism, which is arranged outside the ash tank and includes multiple thermal resistors. The thermal resistors are wound around the outer wall of the ash tank in a ring shape. The ring-shaped thermal resistors are evenly distributed in the vertical direction, and each thermal resistor is electrically connected to a temperature measuring instrument; A controller, which is electrically connected to the output end of the temperature measuring instrument. The controller includes a data acquisition module for acquiring the temperature data measured by the temperature measuring instrument, and a data analysis module for analyzing whether the temperature difference value of different height sections of the ash tank is normal. When the temperature difference value is greater than the normal temperature difference value, an alarm signal is sent out; The data analysis module includes a temperature difference calculation unit and a temperature difference comparison unit; The output end of the data analysis module is electrically connected to a protection relay; The protection relay is electrically connected to an alarm component; The alarm component includes an alarm indicator light and a buzzer; The method includes: Step 1: Start the identification system. The temperature measuring instrument monitors the temperature values of different height sections on the outer wall of the ash tank through multiple ring-shaped thermal resistors respectively; Step 2: The data acquisition module acquires multiple temperature value data in the temperature measuring instrument and transmits the data to the data analysis module; Step 3: The data analysis module calculates the temperature difference value between different height sections of the outer wall of the ash tank through the temperature difference calculation unit inside it and transmits the temperature difference value to the temperature difference comparison unit; Step 4: The temperature difference comparison unit compares the temperature difference values of different heights on the outer wall of the ash tank with the standard temperature difference range to judge whether the inside of the ash tank is blocked. When the calculated temperature difference value is greater than the standard temperature difference value, an alarm signal is sent out; Step 5: When the protection relay receives the alarm signal, it controls the alarm indicator light to turn on, and at the same time the buzzer gives a buzzer warning to remind the operator that the ash tank is blocked. The ash blocking position can be determined according to the installation position of the thermal resistor corresponding to the excessive temperature difference value.

2. The ash hopper plugging alarm recognition method for thermal power plants according to claim 1, characterized in that The thermal resistor is attached to the outer wall of the ash tank through thermal conductive silicone grease.

3. The ash hopper plugging alarm recognition method for a thermal power plant according to claim 2, characterized in that, A heat preservation turn belt is wound outside the thermal resistor.

4. The ash hopper plugging alarm recognition method for thermal power plants according to claim 3, characterized in that, The material of the heat preservation turn belt is a nylon belt.

5. A method for identifying ash hopper plugging alarm in a thermal power plant according to claim 1, characterized in that, The temperature measuring instrument is a multi-channel temperature measuring instrument, and each thermal resistor is connected to a temperature measuring channel.

Images