An acoustic soot blower based on solenoid current analysis

Abstract

The utility model discloses a kind of acoustic soot blower based on electromagnetic valve coil current analysis, it is related to acoustic soot blowing technical field. Including with acoustic soot blower electromagnetic valve electrically connected acoustic soot blower, and the acoustic soot blower electromagnetic valve is provided with multiple, simultaneously multiple the acoustic soot blower electromagnetic valve between each other parallelly connected, and multiple the parallel circuit that the acoustic soot blower electromagnetic valve is formed is electrically connected air switch K by current transmitter IT, simultaneously the parallel circuit and air switch K are electrically connected control power supply AC220V. The utility model monitors the working current of acoustic soot blower electromagnetic valve by current transmitter IT, and according to the working current monitored, directly determine the operating state of acoustic soot blower, to not only can improve the accuracy of fault diagnosis, also improve the response speed of fault diagnosis.

Description

Technical Field

[0001] This utility model relates to the field of acoustic soot blowing technology, specifically to an acoustic soot blower based on electromagnetic valve coil current analysis. Background Technology

[0002] Acoustic soot blowing technology utilizes compressed air to excite high-frequency sound waves (80–350 Hz), which peel away ash from the boiler's heated surface through air-solid resonance and sound pressure gradient shear force, achieving 360° cleaning without dead angles and avoiding mechanical damage. Compared to traditional boiler steam soot blowing methods, acoustic soot blowing technology effectively reduces energy consumption and is a core cleaning technology for the safe and economical operation of modern thermal power boilers. To ensure the effective operation and status monitoring of the acoustic soot blower, corresponding signal detection devices are typically configured in the system, and the equipment's operating status is fed back to the distributed control system (DCS) via electrical signals.

[0003] However, since acoustic soot blowers often rely on pressure sensors to monitor compressed air pressure or use acoustic microphones to detect sound wave frequencies to indirectly determine the equipment's operating status, the following problems exist during the monitoring process:

[0004] Poor environmental adaptability: Sensors are easily affected by harsh working environments such as high temperature, dust accumulation and vibration, which leads to a shortened service life and increased maintenance costs.

[0005] Weak anti-interference capability: Acoustic monitoring is easily affected by complex background noise inside the boiler, requiring complex filtering algorithms to improve the signal-to-noise ratio, which increases the complexity and cost of the system.

[0006] The inability to directly monitor the status of solenoid valves: It is impossible to directly and effectively determine whether the solenoid valve is operating normally (such as valve jamming, coil aging, etc.), which may lead to failure to detect and handle faults in a timely manner, thereby affecting the stability and safety of the entire system. Utility Model Content

[0007] The purpose of this invention is to provide an acoustic soot blower based on electromagnetic valve coil current analysis to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an acoustic sootblower based on solenoid valve coil current analysis, comprising an acoustic sootblower solenoid valve electrically connected to the acoustic sootblower, and multiple acoustic solenoid valves are provided, and the multiple acoustic solenoid valves are connected in parallel to each other, and the parallel circuit composed of the multiple acoustic solenoid valves is electrically connected to an air switch K through a current transmitter IT, and both the parallel circuit and the air switch K are electrically connected to a control power supply AC220V.

[0009] Furthermore, the current transmitter IT is configured as a through-hole current transmitter.

[0010] Furthermore, each of the sonic valves of the sonic soot blower is electrically connected to the current transmitter IT via a switch.

[0011] Furthermore, both the current transmitter IT and the switch are electrically connected to the DCS system, and the output signal of the current transmitter IT and the input signal of the switch interact with the DCS system.

[0012] Furthermore, the solenoid valves and switches of the sonic soot blower are configured in a one-to-one correspondence.

[0013] Furthermore, the operating states of the sonic soot blower include open circuit fault, coil aging, normal operation, and solenoid valve jamming.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Firstly, this utility model monitors the working current of the solenoid valve of the acoustic sootblower using a current transmitter (IT), and directly determines the operating status of the acoustic sootblower based on the monitored working current. This not only improves the accuracy of fault diagnosis but also increases the response speed of fault diagnosis.

[0016] Secondly, this utility model, through the perforated current transmitter based on the Hall principle and modular design, can be installed in the power cabinet of the soot blower in the electronic equipment room, which can effectively overcome the interference of the monitoring system caused by the harsh environment such as high temperature and ash accumulation in the boiler, and can also improve the service life.

[0017] Thirdly, this utility model integrates automated diagnostic logic into the DCS system, which can not only realize zero-point calibration, real-time status display and early warning functions, but also reduce maintenance costs. Attached Figure Description

[0018] Figure 1 This is the circuit connection diagram of the acoustic soot blower based on the current analysis of the solenoid valve coil of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] refer to Figure 1This embodiment provides an acoustic sootblower based on solenoid valve coil current analysis, including an acoustic sootblower solenoid valve corresponding to the acoustic sootblower. Specifically, one acoustic sootblower is electrically connected to one acoustic sootblower solenoid valve, used to monitor the operating status of the acoustic sootblower through the acoustic solenoid valve. In this embodiment, multiple acoustic sootblower solenoid valves (V1-Vn) are provided, and each acoustic sootblower solenoid valve is electrically connected to a switch, that is, multiple switches (D01-D0n) are provided. At the same time, the switches (D01-D0n) and the acoustic sootblower solenoid valves (V1-Vn) are arranged in a one-to-one correspondence, and the series circuit composed of multiple one-to-one correspondent switches (D01) and acoustic sootblower solenoid valves (V1) is connected in parallel to form a parallel circuit composed of multiple acoustic sootblower solenoid valves (V1-Vn) and switches (D01-D0n).

[0021] Furthermore, the parallel circuit consisting of multiple sonic valves (V1-Vn) and switches (D01-D0n) of the acoustic sootblower is electrically connected to the air switch K via a current transmitter IT. Both the parallel circuit and the air switch K are electrically connected to the control power supply AC220V. It is worth noting that the control power supply AC220V in this embodiment is a 220V AC power supply, and the current transmitter IT is a Hall effect perforated current transmitter. Simultaneously, the measurement range of the current transmitter IT should ensure that the operating current of each individual acoustic sootblower sonic valve can be monitored; therefore, in this embodiment, the measurement range of the current transmitter IT is set to 0-200mA. That is to say, both the switches and the current transmitter IT are electrically connected to the DCS system; the switches open and close according to the operating commands of the DCS system to control the operating status of the acoustic sootblower sonic valves (V1-Vn) and the acoustic sootblower. The current transmitter IT is used to monitor the operating current of the solenoid valves (V1-Vn) of the acoustic sootblower and send the monitored operating current to the DCS system, so that the DCS system can judge the operating status of the acoustic sootblower based on the monitored operating current.

[0022] Furthermore, in this embodiment, the operating states of the acoustic sootblower include open circuit fault, coil aging, normal operation, and solenoid valve jamming. Specifically, when the acoustic sootblower is operating normally, the operating current of the solenoid valve is within the range of ln(1±10%) mA. When the acoustic sootblower has an open circuit fault, the operating current of the solenoid valve is less than 1 mA. When the acoustic sootblower coil is aging, the operating current of the solenoid valve is less than ln(1-20%) mA. When the solenoid valve is jammed, the operating current of the solenoid valve is greater than ln(2+20%) mA.

[0023] In this embodiment, when the air switch K is in the closed position and the DCS system sends a start command to any switch (D01-D0n), the corresponding switch will close. At this time, the solenoid valves (V1-Vn) of the acoustic sootblower corresponding to the closed switch will be energized, and the acoustic sootblower corresponding to the solenoid valve will start running. That is to say, the operating current monitored by the current transmitter IT at this time is the operating current of the solenoid valve of the acoustic sootblower corresponding to the running acoustic sootblower. At the same time, when the acoustic sootblower finishes running, the DCS system will send a stop command to the corresponding switch. At this time, the switch will open, the corresponding solenoid valve of the acoustic sootblower will be de-energized, and the corresponding acoustic sootblower will stop running.

[0024] Furthermore, the DCS system's operating logic during current monitoring at the current transmitter's IT terminal includes the following: current zero-point calibration logic, open-circuit fault logic, coil aging logic, normal operation logic, and solenoid valve jamming logic. Specifically, the current zero-point calibration logic is as follows:

[0025] By using the operation buttons in the DCS system, the current value can be reset to zero and used as the reference current when the sonic valve of the acoustic sootblower is not energized. In other words, when none of the acoustic sootblowers are running, there may be uncertain interference currents in the circuit. By resetting the current value to zero through the DCS system, the current value can be used as the reference zero point, thereby improving the accuracy of subsequent current measurements.

[0026] To elaborate further, the open-circuit fault logic is as follows:

[0027] When the DCS system sends a start command (the running time of the acoustic sootblower can be adjusted according to actual needs; in this embodiment, the running time is set to 60 seconds), the switch corresponding to the start of the acoustic sootblower will close, and the corresponding acoustic sootblower solenoid valve will be energized. At this time, the current transmitter IT monitors the operating current of the energized acoustic sootblower solenoid valve. That is, the current monitored by the current transmitter IT is the operating current of the energized acoustic sootblower solenoid valve. Specifically, when the monitored operating current is less than 1mA (which can be adaptively changed according to actual settings; this embodiment is only an example), the display interface of the DCS system will display "Acoustic sootblower open circuit fault".

[0028] To elaborate further, the coil aging logic is as follows:

[0029] When the DCS system sends a start command (the running time of the acoustic sootblower can be adjusted according to actual needs; in this embodiment, the running time is set to 60 seconds), the switch corresponding to the start of the acoustic sootblower will close, and the corresponding acoustic sootblower solenoid valve will be energized. At this time, the current transmitter IT monitors the operating current of the energized acoustic sootblower solenoid valve. When the monitored operating current is greater than 1mA and less than 80% of the rated current (which can be adaptively changed according to actual settings; this embodiment is only an example), the display interface in the DCS system will display "Acoustic sootblower coil aging fault".

[0030] To elaborate further, the normal operating logic is as follows:

[0031] When the DCS system sends a start command (the running time of the acoustic sootblower can be adjusted according to actual needs; in this embodiment, the running time is set to 60 seconds), the switch corresponding to the start of the acoustic sootblower will close, and the corresponding acoustic sootblower solenoid valve will be energized. At this time, the current transmitter IT monitors the operating current of the energized acoustic sootblower solenoid valve. When the monitored operating current is greater than 90% of the rated current and less than 110% of the rated current (which can be adaptively changed according to actual settings; this embodiment is only an example), the display interface in the DCS system will show "Acoustic sootblower is operating normally".

[0032] To elaborate further, the solenoid valve jamming logic is as follows:

[0033] When the DCS system sends a start command (the running time of the acoustic sootblower can be adjusted according to actual needs; in this embodiment, the running time is set to 60 seconds), the switch corresponding to the start of the acoustic sootblower will close, and the corresponding acoustic sootblower solenoid valve will be energized. At this time, the current transmitter IT monitors the operating current of the energized acoustic sootblower solenoid valve. When the monitored operating current is greater than 220% of the rated current (which can be adaptively changed according to actual settings; this embodiment is only an example), the display interface of the DCS system will display "Acoustic sootblower solenoid valve jamming fault".

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. An acoustic soot blower based on electromagnetic valve coil current analysis, characterized in that, It includes an acoustic sootblower solenoid valve electrically connected to the acoustic sootblower, and multiple acoustic sootblower solenoid valves are provided. The multiple acoustic sootblower solenoid valves are connected in parallel with each other, and the parallel circuit composed of the multiple acoustic sootblower solenoid valves is electrically connected to the air switch K through the current transmitter IT. At the same time, the parallel circuit and the air switch K are both electrically connected to the control power supply AC220V.

2. The acoustic soot blower based on electromagnetic valve coil current analysis according to claim 1, characterized in that, The current transmitter IT is configured as a perforated current transmitter.

3. The acoustic soot blower based on electromagnetic valve coil current analysis according to claim 1, characterized in that, Each of the sonic valves of the sonic soot blower is electrically connected to the current transmitter IT via a switch.

4. The acoustic soot blower based on electromagnetic valve coil current analysis according to claim 3, characterized in that, The current transmitter IT and the switch are both electrically connected to the DCS system, and the output signal of the current transmitter IT and the input signal of the switch both interact with the DCS system.

5. The acoustic soot blower based on electromagnetic valve coil current analysis according to claim 3, characterized in that, The solenoid valves and switches of the acoustic soot blower are set up one-to-one.

6. An acoustic soot blower based on electromagnetic valve coil current analysis according to claim 1 or 3, characterized in that, The operating states of the acoustic soot blower include open circuit fault, coil aging, normal operation, and solenoid valve jamming.

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