CN217635693U - Rake type soot blowing system - Google Patents
Rake type soot blowing system Download PDFInfo
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- CN217635693U CN217635693U CN202220926275.8U CN202220926275U CN217635693U CN 217635693 U CN217635693 U CN 217635693U CN 202220926275 U CN202220926275 U CN 202220926275U CN 217635693 U CN217635693 U CN 217635693U
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Abstract
The utility model relates to an deashing technical field specifically provides a rake type soot blowing system, aims at solving the difficult problem that satisfies large-scale production line's technological requirement of adjusting and the control accuracy difference of current soot blower. Mesh for this reason, the utility model discloses a harrow formula soot blower system includes: the controller is arranged to receive the operation signals of the remote control unit and the short-range control unit and correspondingly control the working state of the rake type soot blower; the transmission device can drive the rake type soot blower to move between a first position and a second position; the air path control unit is arranged to control the air compressor and the soot blowing pipe to enter a working state; when the rake type soot blower moves to the first position and the second position, the position signal of the rake type soot blower can be transmitted to the controller through the first limit switch and the second limit switch respectively. The utility model discloses can realize accurate control to the rake type soot blowing system, can set up the operational parameter that the rake type soot blowing system far away and nearby to can its running state of real time monitoring.
Description
Technical Field
The utility model relates to an deashing technical field specifically provides a rake type soot blowing system.
Background
In the flue gas denitration process, a power station boiler is used, in the operation process of the power station boiler, a soot layer is generated on the heating surface of the power station boiler, additional thermal resistance brought by the soot layer can influence heat transfer inside and outside the heating surface of the power station boiler, the flue gas temperature is increased, the thermal efficiency of the power station boiler is reduced, and in severe cases, high and low temperature corrosion can be generated on the heating surface of the boiler, so that the boiler pipe is exploded and leaked, and the efficiency and the production progress of flue gas denitration are influenced. In conclusion, the existing soot blowing device is not easy to adjust and has poor control precision, so that the process requirement of a large-scale production line is difficult to meet.
Accordingly, there is a need in the art for a new rake sootblowing system that addresses the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above technical problem, promptly, solve the difficult problem that satisfies large-scale production line's technological requirement of adjusting and the control accuracy difference of current soot blower.
The utility model provides a rake type soot blowing system, which comprises a rake type soot blower, a controller, a transmission device, a remote control unit, a short-range control unit, a gas circuit control unit and a detection unit;
the rake type soot blower comprises an air compressor and a soot blowing pipe which are connected with each other;
the controller is arranged to receive the operation signals of the remote control unit and the short-range control unit and correspondingly control the working state of the rake type soot blower;
the transmission device can drive the rake type soot blower to move between a first position and a second position, and the transmission device is arranged to receive a control signal of the controller and correspondingly control the rake type soot blower to move;
the gas path control unit is arranged to receive a control signal of the controller and correspondingly control the air compressor and the soot blowing pipe to enter a soot blowing working state;
the detection unit includes a first limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the first position, and a second limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the second position.
In the preferred technical solution of the rake type soot blowing system, the controller includes a CPU, a first communication module, a second communication module, a third communication module, a digital input module and a digital output module, the CPU and the remote control unit perform signal transmission through the first communication module, the CPU and the short-range control unit perform signal transmission through the second communication module, the CPU and the transmission device perform signal transmission through the third communication module, the CPU, the first limit switch and the second limit switch perform signal transmission through the digital input module, and the CPU performs signal transmission through the digital output module and the gas circuit control unit.
In a preferred technical solution of the rake type soot blower system, the transmission device includes a frequency converter and a variable frequency motor connected to each other, the frequency converter is configured to control an operating power of the variable frequency motor, the variable frequency motor is configured to drive the rake type soot blower to move between the first position and the second position, and the frequency converter and the third communication module perform Profibus-DP communication.
In a preferred technical solution of the rake type soot blowing system, the rake type soot blowing system further comprises a field control unit, and the field control unit can transmit an operation signal to the CPU to control the start-stop state of the transmission device and accordingly control the moving state of the rake type soot blower or control the transmission device to enter an emergency braking state and accordingly control the rake type soot blower to brake emergently.
In a preferred technical solution of the rake type soot blower system, the field control unit is a control device, the control device includes a start-stop button and an emergency brake button, and the start-stop button and the emergency brake button both perform signal transmission through the digital input module and the CPU and correspondingly control the start-stop state of the transmission device and thus control the movement state of the rake type soot blower or control the transmission device to enter an emergency brake state and thus control the emergency brake of the rake type soot blower.
In a preferred technical solution of the rake type soot blowing system, the control device further includes a speed control knob, the controller further includes an analog input module, and the speed control knob is configured to perform signal transmission through the analog input module and the CPU and correspondingly control the moving speed of the transmission device.
In a preferred technical solution of the rake type soot blowing system, the detection unit further includes a pressure sensor, the pressure sensor is disposed in the soot blowing pipe, and the pressure sensor is configured to be capable of performing signal transmission through the analog input module and the CPU.
In a preferred technical scheme of the rake type soot blowing system, an electromagnetic valve is arranged in the soot blowing pipe, and the gas path control unit is arranged to control the on-off state of the electromagnetic valve and thus control the air compressor and the soot blowing pipe to enter a soot blowing working state.
In the preferable technical scheme of the rake type soot blowing system, the rake type soot blowing system further comprises an audible and visual alarm, and the audible and visual alarm is set to give out corresponding fault reminding when the rake type soot blowing system fails.
In a preferred embodiment of the rake soot blowing system, the controller and the remote control unit are configured to communicate via a Modbus TCP/IP protocol; and/or the controller and the proximity control unit are arranged to communicate via the Profibus-DP protocol.
Under the condition of adopting the technical scheme, the rake type soot blowing system comprises a rake type soot blower, a controller, a transmission device, a remote control unit, a short-range control unit, a gas circuit control unit and a detection unit; the rake type soot blower comprises an air compressor and a soot blowing pipe which are connected with each other; the controller is arranged to receive the operation signals of the remote control unit and the short-range control unit and correspondingly control the working state of the rake type soot blower; the transmission device can drive the rake type soot blower to move between a first position and a second position, and the transmission device is arranged to receive a control signal of the controller and correspondingly control the movement of the rake type soot blower; the gas circuit control unit is arranged to receive the control signal of the controller and correspondingly control the air compressor and the soot blowing pipe to enter a soot blowing working state; the detection unit includes a first limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the first position, and a second limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the second position. The utility model can realize the accurate control of the rake type soot blowing system by the remote control unit and the short-range control unit through the arrangement of the controller; through the arrangement of the remote control unit and the short-range control unit, an operator can remotely and nearby set the operating parameters of the rake type soot blowing system and can monitor the operating state of the rake type soot blowing system in real time; the transmission device is arranged to enable the rake type soot blower to perform soot blowing cleaning in a moving mode, and the detection unit can detect the moving position of the rake type soot blower.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a macro-frame diagram of a rake sootblowing system of the present invention;
FIG. 2 is a detailed architecture diagram of a preferred embodiment of the rake soot blowing system of the present invention;
reference numerals:
1. a rake type soot blower; 2. a controller; 21. a CPU; 22. a first communication module; 23. a second communication module; 24. a third communication module; 25. a digital quantity input module; 26. a digital quantity output module; 27. an analog input module; 3. a transmission device; 31. a variable frequency motor; 32. a frequency converter; 4. a remote control unit; 5. a short-range control unit; 6. a gas circuit control unit; 61. an electromagnetic valve; 7. a detection unit; 71. a first limit switch; 72. a second limit switch; 73. a pressure sensor; 8. a field control unit; 81. a start-stop button; 82. an emergency brake button; 83. a speed regulation knob; 9. an audible and visual alarm.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "close" and the like are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g. as a fixed connection or a detachable connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring first to fig. 1 and 2, wherein fig. 1 is a macro-frame diagram of the rake type soot blowing system of the present invention, and fig. 2 is a detailed frame diagram of a preferred embodiment of the rake type soot blowing system of the present invention. As shown in fig. 1 and 2, the present invention provides a rake soot blowing system, which includes a rake soot blower 1, a controller 2, a transmission 3, a remote control unit 4, a short-range control unit 5, a gas circuit control unit 6 and a detection unit 7; the rake type soot blower 1 comprises an air compressor (not shown in the figure) and a soot blowing pipe (not shown in the figure) which are connected; the controller 2 is arranged to receive the operation signals of the remote control unit 4 and the short-range control unit 5 and correspondingly control the working state of the rake type soot blower 1; the transmission device 3 can drive the rake type soot blower 1 to move between a first position (not shown in the figure) and a second position (not shown in the figure), and the transmission device 3 is arranged to receive a control signal of the controller 2 and control the rake type soot blower 1 to move correspondingly; the gas circuit control unit 6 is arranged to receive the control signal of the controller 2 and correspondingly control the air compressor and the soot blowing pipe to enter a soot blowing working state; the detection unit 7 includes a first limit switch 71 and a second limit switch 72, the first limit switch 71 being capable of transmitting a position signal of the rake sootblower 1 to the controller 2 when the rake sootblower 1 is moved to the first position, and the second limit switch 72 being capable of transmitting a position signal of the rake sootblower 1 to the controller 2 when the rake sootblower 1 is moved to the second position.
Specifically, an operator may issue an activation command through the remote control unit 4 and the proximity control unit 5, the controller 2 transmits an activation signal to the transmission 3, and the transmission 3 causes the rake sootblower 1 to move from the first position to the second position; an operator can give a back command through the remote control unit 4 and the short-range control unit 5, the controller 2 transmits the back command to the transmission device 3 in the form of a signal, the transmission device 3 enables the rake type soot blower 1 to move from the second position to the first position, when the rake type soot blower 1 moves to the first position, the first limit switch 71 generates a back-to-position signal and transmits the signal to the controller 2, and at the moment, the controller 2 controls the transmission device 3 to enable the rake type soot blower 1 to stop moving; when the rake type soot blower 1 moves to the second position, the second limit switch generates a forward-to-position signal and transmits the forward-to-position signal to the controller 2, and at the moment, the controller 2 controls the transmission device 3 to enable the rake type soot blower 1 to stop moving.
Simultaneously with the process that the rake type soot blower 1 moves from the first position to the second position or the process that the rake type soot blower 1 moves from the second position to the first position, the controller 2 simultaneously transmits an operating signal to the gas circuit control unit 6, and the gas circuit control unit 6 controls the air compressor and the soot blowing pipe to enter a soot blowing operating state, so that the rake type soot blower 1 performs soot blowing cleaning operation while moving.
Based on the structural arrangement, the rake type soot blowing system can be accurately controlled by a remote control unit 4 and a short-range control unit 5 through the arrangement of a controller 2, and the remote control unit 4 and the short-range control unit 5 enable an operator to remotely and nearby set the operating parameters of the rake type soot blowing system and simultaneously monitor the operating state of the rake type soot blowing system in real time; the transmission 3 enables the rake sootblower to perform sootblowing cleaning in a moving manner.
It should be noted that the present invention does not limit the specific setting positions of the first limit switch 71 and the second limit switch 72, for example, the first limit switch 71 and the second limit switch 72 are respectively arranged on the moving track of the rake type soot blower 1 at positions corresponding to the first position and the second position, and the rake type soot blower 1 is provided with a sensor for sensing the first limit switch 71 and the second limit switch 72; the first limit switch 71 and the second limit switch 72 may be both arranged on the rake type soot blower 1, and corresponding sensors are respectively arranged at positions on the moving track of the rake type soot blower 1 corresponding to the first position and the second position; the technical personnel can set according to the actual situation.
It should be noted that, the present invention does not limit the specific distance between the first position and the second position, and the technician can set the distance according to the actual situation.
Referring to fig. 2, as shown in fig. 2, the controller 2 includes a CPU21, a first communication module 22, a second communication module 23, a third communication module 24, a digital input module 25, and a digital output module 26, the CPU21 and the remote control unit 4 perform signal transmission through the first communication module 22, the CPU21 and the short-range control unit 5 perform signal transmission through the second communication module 23, the CPU21 and the transmission device 3 perform signal transmission through the third communication module 24, the CPU21 and the first limit switch 71 and the second limit switch 72 perform signal transmission through the digital input module 25, and the CPU21 performs signal transmission through the digital output module 26 and the gas circuit control unit 6.
Further, the transmission device 3 comprises a frequency converter 32 and a frequency conversion motor 31 which are connected, the frequency converter 32 is arranged to control the operating power of the frequency conversion motor 31, the frequency conversion motor 31 is arranged to drive the rake sootblower 1 to move between the first position and the second position, and the frequency converter 32 is in Profibus-DP communication with the third communication module 24. Specifically, the CPU21 transmits the control signal to the third communication module 24, the third communication module 24 and the frequency converter 32 perform Profibus-DP communication, the CPU21 can perform start/stop and frequency control of the frequency converter 32 in real time through the Profibus-DP communication, and can transmit information to the CPU21 after the frequency converter 32 or the variable frequency motor 31 fails, and the CPU21 transmits the information to the remote control unit 4 and the short-range control unit 5.
Referring next to fig. 1 and 2, in the preferred embodiment, the rake sootblower system further comprises a field control unit 8, the field control unit 8 transmitting an operation signal to the CPU21 to control the on-off state of the transmission 3 and thus the movement state of the rake sootblower 1 or to control the transmission 3 to enter an emergency braking state and thus the emergency braking of the rake sootblower 1, respectively. Specifically, the site control unit 8 is a control device (not shown in the figure) including a start-stop button 81 and an emergency brake button 82, the start-stop button 81 and the emergency brake button 82 both perform signal transmission through the digital input module 25 and the CPU21 and accordingly control the start-stop state of the transmission device 3 and thus control the movement state of the rake type soot blower 1 or control the transmission device 3 to enter the emergency brake state and thus control the emergency brake of the rake type soot blower 1, the operator transmits a start signal or a stop signal to the CPU21 through the start-stop button 81 through the digital input module 25, and the CPU21 transmits the start signal or the stop signal to the transmission device 3 through the third communication module 24 so that the transmission device 3 controls whether the rake type soot blower 1 moves between the first position and the second position; the operator transmits the emergency braking signal to the CPU21 through the emergency braking button 82 via the digital input module 25, and the CPU21 transmits the emergency braking signal to the transmission 3 via the third communication module 24, so that the transmission 3 enters an emergency braking state, at which time the rake type sootblower 1 stops moving.
Further, the control device further comprises a speed regulation knob 83, the controller 2 further comprises an analog input module 27, and the speed regulation knob 83 is configured to perform signal transmission through the analog input module 27 and the CPU21 and correspondingly control the moving speed of the transmission device 3. Specifically, the operator can select the moving speed of the transmission 3 through the speed adjusting knob 83, the speed adjusting knob 83 transmits a speed signal to the CPU21 through the analog input module 27, and the CPU21 transmits the speed signal to the transmission 3 through the third communication module 24 and thus controls the rotating speed of the variable frequency motor 31, thereby controlling the moving speed of the rake type soot blower 1 when moving between the first position and the second position.
It should be noted that the present invention may not be provided with the control device, for example, the remote control unit 4 and the short-range control unit 5 are both provided with a start-stop button 81, an emergency brake button 82 and a speed-adjusting knob 83; the start-stop button 81, the emergency brake button 82 and the speed regulation knob 83 may be virtual keys arranged in the display screens of the remote control unit 4 and the short-range control unit 5; the technical personnel can set the setting according to the actual situation.
In addition, in the preferred embodiment, the detection unit 7 further includes a pressure sensor 73, the pressure sensor 73 is disposed in the soot blowing pipe, and the pressure sensor 73 is disposed to be capable of signal transmission through the analog input module 27 and the CPU 21. Specifically, the pressure sensor 73 can detect the pressure of compressed air for soot blowing in the soot blowing pipe in real time during the process that the rake type soot blower 1 moves from the first position to the second position so as to ensure the soot blowing cleaning effect, the pressure sensor 73 transmits the detected pressure to the CPU21 through the analog input module 27 in the form of an analog signal, and the CPU21 transmits the pressure signal to the remote control unit 4 through the first communication module 22 and simultaneously transmits the pressure signal to the short-range control unit 5 through the second communication module 23.
Further, an electromagnetic valve 61 is arranged in the soot blowing pipe, and the gas path control unit 6 is arranged to control the on-off state of the electromagnetic valve 61 and thus control the air compressor and the soot blowing pipe to enter the soot blowing working state. Specifically, the installation position of the electromagnetic valve 61 in the soot blowing pipe is located on one side of the pressure sensor 73 in the direction close to the outlet of the soot blowing pipe, so that the pressure sensor 73 can still detect the pressure in the soot blowing pipe when the electromagnetic valve 61 is in the closed state, and the controller 2 controls the on-off state of the electromagnetic valve 61 through the gas path control unit 6; on the premise that the air compressor provides compressed air into the soot blowing pipe, when the electromagnetic valve 61 is in an open state, the soot blowing pipe performs soot blowing operation, and when the electromagnetic valve 61 is in a closed state, the soot blowing pipe does not perform soot blowing operation. Of course, the controller 2 controls the on/off state of the electromagnetic valve 61 through the air channel control unit 6 is only a preferred configuration, and the controller 2 may also directly control the on/off state of the electromagnetic valve 61, specifically, the CPU21 transmits a control signal to the electromagnetic valve 61 through the digital output module 26 to control the on/off state of the electromagnetic valve 61 accordingly, and the technician may set the on/off state according to actual situations.
With continued reference to fig. 2, the rake type soot blowing system further comprises an audible and visual alarm 9, and the audible and visual alarm 9 is configured to give out a corresponding fault prompt when the rake type soot blowing system fails. Specifically, if the rake type soot blowing system fails, the CPU21 transmits a fault signal to the audible and visual alarm 9 through the digital quantity output module 26, and the audible and visual alarm 9 receives the fault signal and then sends out a corresponding fault prompt, for example, if the rake type soot blowing system fails to start, the audible and visual alarm 9 flashes, and if the rake type soot blowing system fails to cause other serious faults, the rake type soot blowing system stops working, the audible and visual alarm 9 is constantly on, and the fault prompt mode of the audible and visual alarm 9 is set by a technician according to the actual situation.
It should be noted that the connection between the audible and visual alarm 9 and the controller 2 is only a preferred setting mode, and the audible and visual alarm 9 may also be set independently, and can receive the fault signal transmitted by the controller 2 and perform fault reminding, and the technician can set the alarm according to the actual situation.
Further, the controller 2 and the remote control unit 4 are arranged to communicate via the Modbus TCP/IP protocol; the controller 2 and the proximity control unit 5 are arranged to communicate via the Profibus-DP protocol. Specifically, the short-range control unit 5 is an HMI, signal transmission between the HMI and the second communication module 23 is completed through a Profibus-DP protocol, and signal transmission between the remote control unit 4 and the first communication module 22 is completed through a Modbus TCP/IP protocol.
The specific work flow of the rake type soot blowing system is as follows:
if the rake sootblower system is required to operate automatically, the operator sets the start time of the transmission 3, the operation time of the rake sootblower 1 moving from the first position to the second position and the operation speed of the variable frequency motor 31 by means of the remote control unit 4 or the proximity control unit 5.
The remote control unit 4 or the short-range control unit 5 issues a starting instruction and transmits the starting instruction to the CPU21 in the form of a signal, the CPU21 receives the starting signal and transmits the starting signal to the transmission device 3 through the third communication module 24, the transmission device 3 controls the rake type soot blower 1 to move, before the transmission device 3 is not started, the rake type soot blower 1 is in the first position, the first limit switch 71 always transmits a backward-to-position signal to the CPU21, after the transmission device 3 receives the starting signal, the backward-to-position signal disappears, the transmission device 3 transmits a forward signal to the CPU21, at the moment, the transmission device 3 is started successfully, the transmission device 3 drives the rake type soot blower 1 to move from the first position to the second position, in the process that the rake type soot blower 1 moves from the first position to the second position, the transmission device 3 transmits the forward signal to the CPU21 in real time, the CPU21 transmits the forward signal to the remote control unit 4 and the short-range control unit 5 in real time, and the remote control unit 4 and the short-range control unit 5 store and display the forward signal in a short-range; after the transmission device 3 receives the starting signal for 5 seconds, if the signal of backing to the right position does not disappear, the starting failure of the transmission device 3 is proved, at the moment, the CPU21 generates a fault signal and transmits the fault signal to the remote control unit 4 and the short-range control unit 5, an operator can give an instruction through the remote control unit 4 and the short-range control unit 5 to stop the operation of the transmission device 3, so that the damage to the rake type soot blower is avoided.
When the transmission device 3 is started successfully, that is, when the CPU21 receives a forward signal, the CPU21 generates a working signal and transmits the working signal to the electromagnetic valve 61 through the digital output module 26, so that the electromagnetic valve 61 is opened, and at the same time, the air compressor feeds compressed air into the soot blowing pipe, when the rake soot blower 1 moves from the first position to the second position, the electromagnetic valve 61 is always opened to perform soot blowing cleaning operation, the pressure sensor 73 transmits the detected pressure value of the compressed air to the CPU21 through the analog input module 27 in the form of a signal, the CPU21 transmits the pressure value signal to the remote control unit 4 and the short range control unit 5, if the detected pressure value is less than 0.5MPa, the CPU21 generates a stop signal and transmits the stop signal to the transmission device 3 through the third communication module 24, and the transmission device 3 stops operating after receiving the stop signal, so that the rake soot blower 1 stops moving; when the CPU21 generates a stop signal, the CPU21 generates a closing signal and transmits the closing signal to the electromagnetic valve 61 through the digital quantity output module 26, the electromagnetic valve 61 is in a closing state after receiving the closing signal, a recovery signal is generated by the CPU21 when the pressure value detected by the pressure sensor 73 is larger than or equal to 0.5MPa, and the recovery signal is transmitted to the transmission device 3 through the third communication module 24, so that the transmission device 3 continues to move; when the CPU21 generates the stop signal, the CPU21 generates a fault signal, and transmits the fault signal to the audible and visual alarm 9 through the digital quantity output module 26 for fault reminding.
When the rake type soot blower 1 moves to the second position, the second limit switch 72 generates a forward-in-place signal, the forward-in-place signal is transmitted to the CPU21 through the digital quantity input module 25, the CPU21 transmits the forward-in-place signal to the remote control unit 4 and the short-range control unit 5, the starting instruction issued by the remote control unit 4 and the short-range control unit 5 disappears, and therefore the transmission device 3 is controlled to stop working, so that the rake type soot blower 1 stops moving, when the starting instruction disappears, the air compressor stops providing compressed air into the soot blowing pipe, and when the starting instruction disappears, the CPU21 controls the electromagnetic valve 61 to be in a closed state.
When the rake type soot blower 1 is located at the second position, the second limit switch 72 always transmits a forward-in-place signal to the CPU21, the remote control unit 4 or the short-range control unit 5 issues a backward instruction and transmits the backward instruction to the CPU21 in the form of a signal, the CPU21 controls the transmission device 3 to operate, the forward-in-place signal generated by the second limit switch 72 disappears, at this time, the transmission device 3 drives the rake type soot blower 1 to move from the second position to the first position, the second limit switch 72 always transmits a backward signal to the CPU21 in the process that the rake type soot blower 1 moves from the second position to the first position, the CPU21 transmits the backward signal to the remote control unit 4 and the short-range control unit 5, when the rake type soot blower 1 moves to the first position, the first limit switch 71 generates a backward-in-place signal and transmits the backward signal to the CPU21, the CPU21 transmits the backward-in-place signal to the remote control unit 4 and the short-range control unit 5, the command generated by the remote control unit 4 or the short-range control unit 5 disappears, and the transmission device 3 stops moving. The first limit switch 71 signals the time from the disappearance of the back-in-place signal to the appearance of the back-in-place signal to the CPU21 for detecting whether the rake soot blowing system is operated overtime.
Under the condition that the transmission device 3 does not work, if the backward signal is 0 for a long time, it is proved that the rake type soot blower 1 does not backward in place, at the moment, the CPU21 generates a fault signal and transmits the fault signal to the remote control unit 4 and the short-range control unit 5, the CPU21 transmits the fault signal to the audible and visual alarm 9 to enable the audible and visual alarm 9 to carry out fault reminding, an operator checks the fault reason and removes the fault, the fault signal disappears after the fault is removed, and the rake type soot blower 1 automatically resets, namely, the rake type soot blower 1 moves to the first position.
An operator can also perform field manual control on the rake type soot blowing system through the field control unit 8, the control mode of the rake type soot blowing system through the start-stop button 81, the emergency brake button 82 and the speed regulation knob 83 is as described above, and no further description is given here, after the operator presses the emergency brake button 82, the CPU21 generates a fault signal and transmits the fault signal to the audible and visual alarm 9 for fault reminding, and the operator can also perform field control on the rake type soot blowing system through the HMI.
The remote control unit 4 and the short-range control unit 5 can display the working state of the rake type soot blowing system in real time.
In summary, the controller 2 enables the rake type soot blowing system to control the movement of the rake type soot blower 1 regardless of remote control or field control, and enables the rake type soot blowing system to operate safely and stably. The rake type soot blowing system takes the CPU21 as a control core, can perform data interaction with the remote control unit 4 and the HMI, realizes real-time control, has high automation degree, greatly saves manpower, and can fully automatically and stably operate.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. A rake type soot blowing system is characterized by comprising a rake type soot blower, a controller, a transmission device, a remote control unit, a short-range control unit, a gas path control unit and a detection unit;
the rake type soot blower comprises an air compressor and a soot blowing pipe which are connected with each other;
the controller is arranged to receive the operation signals of the remote control unit and the short-range control unit and correspondingly control the working state of the rake type soot blower;
the transmission device can drive the rake type soot blower to move between a first position and a second position, and the transmission device is arranged to receive a control signal of the controller and correspondingly control the rake type soot blower to move;
the gas path control unit is arranged to receive a control signal of the controller and correspondingly control the air compressor and the soot blowing pipe to enter a soot blowing working state;
the detection unit includes a first limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the first position, and a second limit switch capable of transmitting a position signal of the rake sootblower to the controller when the rake sootblower is moved to the second position.
2. The rake soot blowing system as claimed in claim 1, wherein the controller comprises a CPU, a first communication module, a second communication module, a third communication module, a digital input module and a digital output module, the CPU and the remote control unit perform signal transmission through the first communication module, the CPU and the proximity control unit perform signal transmission through the second communication module, the CPU and the transmission device perform signal transmission through the third communication module, the CPU and the first limit switch and the second limit switch perform signal transmission through the digital input module, and the CPU performs signal transmission through the digital output module and the gas path control unit.
3. The rake soot blowing system of claim 2, wherein the transmission comprises a frequency converter and a variable frequency motor connected, the frequency converter being configured to control an operating power of the variable frequency motor, the variable frequency motor being configured to drive the rake soot blower between the first position and the second position, the frequency converter being in Profibus-DP communication with the third communication module.
4. The rake soot blowing system of claim 3, further comprising a field control unit capable of transmitting an operation signal to the CPU to control the on-off state of the transmission and thus the movement state of the rake soot blower or to control the transmission to enter an emergency braking state and thus the rake soot blower emergency braking, respectively.
5. The rake soot blowing system of claim 4, wherein the site control unit is a control device comprising a start-stop button and an emergency brake button, both of which are signaled by the digital input module and the CPU and accordingly control the start-stop state of the transmission and thus the movement state of the rake soot blower or control the transmission to enter an emergency braking state and thus the emergency braking of the rake soot blower.
6. The rake sootblower system of claim 5, wherein said operator further comprises a speed knob, said controller further comprising an analog input module, said speed knob configured to enable signal transmission through said analog input module and said CPU and to control the speed of movement of said transmission accordingly.
7. The rake soot blowing system of claim 6, wherein the detection unit further comprises a pressure sensor disposed within the soot blowing tube, the pressure sensor being disposed for signal transmission through the analog input module and the CPU.
8. The rake soot blowing system as claimed in any one of claims 1 to 7, wherein a solenoid valve is provided in the soot blowing pipe, and the gas circuit control unit is arranged to control the on-off state of the solenoid valve and thus the air compressor and the soot blowing pipe to enter a soot blowing operation state.
9. The rake type soot blowing system as claimed in any one of claims 1 to 7, further comprising an audible and visual alarm arranged to give a corresponding fault warning when the rake type soot blowing system is in fault.
10. Rake sootblowing system according to any of claims 1 to 7, wherein said controller and said remote control unit are arranged to communicate via Modbus TCP/IP protocol; and/or the controller and the proximity control unit are configured to communicate via a Profibus-DP protocol.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926275.8U CN217635693U (en) | 2022-04-20 | 2022-04-20 | Rake type soot blowing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220926275.8U CN217635693U (en) | 2022-04-20 | 2022-04-20 | Rake type soot blowing system |
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| CN217635693U true CN217635693U (en) | 2022-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117663166A (en) * | 2024-01-30 | 2024-03-08 | 青岛瑞莱德电力设备有限公司 | Control system and control method of rake soot blower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117663166A (en) * | 2024-01-30 | 2024-03-08 | 青岛瑞莱德电力设备有限公司 | Control system and control method of rake soot blower |
| CN117663166B (en) * | 2024-01-30 | 2024-04-09 | 青岛瑞莱德电力设备有限公司 | Control system and control method of rake soot blower |
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