Soot blowing cleaning system and method

Abstract

The invention relates to the technical field of soot blowers, in particular to a soot blowing cleaning system and method.The soot blowing cleaning system comprises a time relay KT1, an advancing contactor KMF, a retreating contactor KMR, an advancing limiting switch LSF1, a retreating limiting switch LSR1 and a motor which are arranged on a soot blower; one end of a contact of the time relay KT1 is electrically connected with one end of a coil of the time relay KT1 and a zero line end of an external control power supply, and the other end of the coil of the time relay KT1 is electrically connected with an external decentralized control system, one end of a forward limit switch LSF1 and a live line end of the external control power supply. According to the soot blower, the electrified state of the time relay KT1 is controlled through an external distributed control system, so that intermittent blowing operation is achieved in the running process of the soot blower, dust on the surface can be blown away and taken away, the blocking phenomenon can be avoided, meanwhile, the blowing effect can be improved, and the circulation area is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of soot blowers, and particularly to a soot blowing and cleaning system and method. Background Art

[0002] For the existing SCR honeycomb catalyst soot blowing and cleaning system, one is a fixed type, and the other is a mobile type. For the mobile soot blowing and cleaning system, its blowing action is usually controlled by a set PLC program to achieve continuous moving blowing; however, continuous non-stop blowing is likely to cause blockage, and manual blowing is required after blockage; moreover, when the electric field trips due to problems, the SCR differential pressure increases rapidly. Using this method for blowing, the blowing effect is poor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a soot blowing and cleaning system and method that can avoid blockage, improve the blowing effect, and increase the flow area.

[0004] To solve the above technical problem, the first technical solution adopted by the present invention is: A soot blowing and cleaning system includes a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1, and a motor provided on a soot blower. One end of the contact of the time relay KT1 is electrically connected to one end of the coil of the time relay KT1 and the zero line end of an external control power supply respectively. The other end of the coil of the time relay KT1 is electrically connected to a distributed control system, one end of the forward limit switch LSF1, and the live wire end of the external control power supply respectively. The other end of the forward limit switch LSF1 is electrically connected to one end of the auxiliary contact of the reverse contactor KMR. The other end of the auxiliary contact of the reverse contactor KMR is electrically connected to one end of the coil of the forward contactor KMF. The other end of the coil of the forward contactor KMF is electrically connected to the other end of the contact of the time relay KT1 and one end of the coil of the reverse contactor KMR respectively. The other end of the coil of the reverse contactor KMR is electrically connected to one end of the auxiliary contact of the forward contactor KMF. The other end of the auxiliary contact of the forward contactor KMF is electrically connected to one end of the reverse limit switch LSR1. The other end of the reverse limit switch LSR1 is electrically connected to the distributed control system. The motor is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. The motor is used to drive a blow gun for blowing operation. The other end of the main contact of the forward contactor KMF and the other end of the main contact of the reverse contactor KMR are both electrically connected to an external power supply.

[0005] The second technical solution adopted by the present invention is: A soot blowing and cleaning method based on the above soot blowing and cleaning system, comprising the following steps: S1. The distributed control system issues a start command, the coil of the time relay KT1 is energized, and the contacts of the time relay KT1 are closed; S2. Detect the state of the forward limit switch LSF1 and determine whether the forward limit switch is in the closed state; S3. If the forward limit switch LSF1 is in the closed state, execute step S4; S4. When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contacts of the forward contactor KMF are disconnected, and an interlock is formed with the reverse contactor KMR; after the coil of the forward contactor KMF is energized, the motor is energized to rotate forward. The motor drives the soot blowing gun to move forward for one minute and then stops for five minutes before performing fixed-point soot blowing. This cycle continues until the soot blower touches the forward limit switch LSF1; S5. When the soot blower touches the forward limit switch LSF1, a signal to retract the gun is triggered, the coil of the forward contactor KMF is de-energized, the coil of the reverse contactor KMR is energized, the motor rotates in reverse, and the motor drives the soot blowing gun to retract to the initial position; S6. When the soot blowing gun retracts to the initial position, the reverse limit switch LSR1 is disconnected, the coil of the reverse contactor KMR is de-energized, the motor stops running, and the soot blower completes one soot blowing cycle.

[0006] The beneficial effects of the present invention are as follows: In this solution, a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1, and a motor are provided on the soot blower. The energized state of the time relay KT1 is controlled by the externally provided distributed control system, so that the soot blower realizes intermittent soot blowing operation during operation. In this way, the surface dust can be more effectively dispersed and carried away, the phenomenon of blockage can be avoided, and the soot blowing effect can be improved, increasing the flow area. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is the electrical schematic diagram of the soot blowing and cleaning system of the present invention; Figure 2 is the step flow chart of the soot blowing and cleaning method of the present invention; Reference numerals: 1. Motor; 2. Control power supply; 3. Power supply; 4. Distributed control system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0008] To describe in detail the technical content, the achieved objectives and the effects of the present invention, the following is described in conjunction with the embodiments and with reference to the drawings.

[0009] Please refer toFigure 1 , the first technical solution adopted by the present invention is as follows: A soot blowing and cleaning system includes a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1 and a motor provided on a soot blower. One end of the contact of the time relay KT1 is electrically connected to one end of the coil of the time relay KT1 and the zero line end of an externally provided control power supply. The other end of the coil of the time relay KT1 is electrically connected to an externally provided distributed control system, one end of the forward limit switch LSF1 and the live wire end of the externally provided control power supply. The other end of the forward limit switch LSF1 is electrically connected to one end of the auxiliary contact of the reverse contactor KMR. The other end of the auxiliary contact of the reverse contactor KMR is electrically connected to one end of the coil of the forward contactor KMF. The other end of the coil of the forward contactor KMF is electrically connected to the other end of the contact of the time relay KT1 and one end of the coil of the reverse contactor KMR. The other end of the coil of the reverse contactor KMR is electrically connected to one end of the auxiliary contact of the forward contactor KMF. The other end of the auxiliary contact of the forward contactor KMF is electrically connected to one end of the reverse limit switch LSR1. The other end of the reverse limit switch LSR1 is electrically connected to the externally provided distributed control system. The motor is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. The motor is used to drive a blow gun to perform a blowing operation. The other ends of the main contacts of the forward contactor KMF and the reverse contactor KMR are both electrically connected to the externally provided power supply.

[0010] As can be seen from the above description, the beneficial effects of the present invention are as follows: In this solution, by providing a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1 and a motor on the soot blower, and controlling the energized state of the time relay KT1 through an externally provided distributed control system, the soot blower can perform intermittent and discontinuous blowing operations during operation, so that the surface dust can be more effectively blown away and taken away, avoiding the phenomenon of blockage, and at the same time improving the blowing effect and increasing the flow area.

[0011] Further, the time relay KT1 is a power-on delay type time relay.

[0012] Further, it also includes a thermal relay FR provided on the soot blower. One end of the coil of the thermal relay FR is electrically connected to the motor. The other end of the coil of the thermal relay FR is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. One end of the contact of the thermal relay FR is electrically connected to the other end of the coil of the forward contactor KMF and one end of the coil of the reverse contactor KMR respectively. The other end of the contact of the thermal relay FR is electrically connected to the other end of the contact of the time relay KT1.

[0013] As can be seen from the above description, the thermal relay can monitor the motor current in real time. During the operation of the soot blower, once the motor has abnormal conditions such as locked rotor or overload, resulting in excessive current, the thermal relay will quickly respond, such as tripping to cut off the motor power supply. This can prevent the motor from being burned due to long-term overcurrent, effectively protecting the motor and the entire soot blower equipment and extending the service life of the equipment.

[0014] Further, it also includes a control power air switch ZK2 provided on the soot blower. One end of the contact of the time relay KT1 and one end of the coil of the time relay KT1 are both electrically connected to the neutral wire end of the external control power supply through the control power air switch ZK2. One end of the forward limit switch LSF1 and the other end of the coil of the time relay KT1 are both electrically connected to the live wire end of the external control power supply through the control power air switch ZK2.

[0015] As can be seen from the above description, the control power air switch can quickly cut off the circuit in case of abnormal conditions such as overload or short circuit in the circuit. During the operation of the system, if the current in the control circuit exceeds the rated current of the control power air switch, it will automatically trip. This can prevent dangers such as overheating, burning, and even fire of the circuit caused by excessive current, and protect the electrical components in the control circuit from being damaged.

[0016] Further, it also includes a power supply air switch ZK1 provided on the soot blower. The other end of the main contact of the forward contactor KMF and the other end of the main contact of the reverse contactor KMR are both electrically connected to the external power supply through the power supply air switch ZK1.

[0017] As can be seen from the above description, the power supply air switch is a key protection device for the system power circuit. During the operation of the soot blower, if the motor has faults such as overload or short circuit, resulting in an instantaneous increase in current, the power supply air switch will quickly respond and automatically cut off the circuit. This can prevent key equipment such as the motor and transmission device from being damaged by excessive current, prevent the equipment from being burned, ensure the safe and stable operation of the system, and reduce the maintenance cost and downtime.

[0018] Further, it further includes a selection switch GK, a field gun-in button START, and a field gun-out button RVS provided on the soot blower. The stationary terminal of the selection switch GK is electrically connected to the live wire terminal of the external control power supply. The two moving terminals of the selection switch GK are respectively electrically connected to one end of the field gun-in button START and an external distributed control system. The other end of the field gun-in button START is respectively electrically connected to the other end of the coil of the time relay KT1, one end of the forward limit switch LSF1, and the external distributed control system. One end of the field gun-out button RVS is respectively electrically connected to the other end of the reverse limit switch LSR1 and the external distributed control system.

[0019] Further, the selection switch GK is a three-position selection switch.

[0020] Further, the power supply is a three-phase power supply.

[0021] Further, the control power supply is a 220V AC power supply, and the power supply is a 380V AC power supply.

[0022] Please refer to Figure 2 , the second technical solution adopted by the present invention is: A soot blowing and cleaning method based on the above-mentioned soot blowing and cleaning system includes the following steps: S1. The distributed control system issues a start command, the coil of the time relay KT1 is energized, and the contacts of the time relay KT1 are closed; S2. Detect the state of the forward limit switch LSF1 and determine whether the forward limit switch is in a closed state; S3. If the forward limit switch LSF1 is in a closed state, then execute step S4; S4. When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contacts of the forward contactor KMF are disconnected, and form an interlock with the reverse contactor KMR; after the coil of the forward contactor KMF is energized, the motor is energized to rotate forward, the motor drives the soot blowing gun to move forward for one minute and then stops for five minutes and then performs fixed-point purging, and so on in a cycle until the soot blower touches the forward limit switch LSF1; S5. When the soot blower touches the forward limit switch LSF1, a gun-out signal is triggered, the coil of the forward contactor KMF is de-energized, the coil of the reverse contactor KMR is energized, the motor rotates in reverse, and the motor drives the soot blowing gun to move backward to the initial position; S6. When the soot blowing gun returns to the initial position, the reverse limit switch LSR1 is disconnected, the coil of the reverse contactor KMR is de-energized, the motor stops running, and the soot blower completes a soot blowing cycle.

[0023] From the above description, it can be seen that the beneficial effects of the present invention are: In this solution, a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1 and a motor are set on the soot blower. The energized state of the time relay KT1 is controlled by the peripheral distributed control system. When the coil of the time relay KT1 is energized, the contacts of the time relay KT1 are closed. The state of the forward limit switch LSF1 is detected, and it is judged whether the forward limit switch is in the closed state. When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contacts of the forward contactor KMF are disconnected, and an interlock is formed with the reverse contactor KMR. After the coil of the forward contactor KMF is energized, the motor is energized to rotate forward. The motor drives the soot blower gun to move forward for one minute and then stop for five minutes before performing fixed-point purging. This cycle continues until the soot blower touches the forward limit switch LSF1. When the soot blower touches the forward limit switch LSF1, a signal to retract the gun is triggered. The coil of the forward contactor KMF loses power, the coil of the reverse contactor KMR is energized, the motor rotates in reverse, and the motor drives the soot blower gun to retract to the initial position. When the soot blower gun retracts to the initial position, the reverse limit switch LSR1 is disconnected, the coil of the reverse contactor KMR loses power, the motor stops running, and the soot blower completes one soot blowing cycle. By adopting the above purging method, the motor can drive the soot blower gun to move forward for one minute and then stop for five minutes before performing fixed-point purging. This enables the soot blower to perform intermittent and discontinuous purging operations during operation, which can better disperse the dust on the surface and carry it away, avoiding the occurrence of blockage, and at the same time improving the purging effect and increasing the flow area.

[0024] Please refer to Figure 1 , Embodiment 1 of the present invention is as follows: A soot blowing and cleaning system includes a time relay KT1 (a relay of model JSS48A-S can be used), a forward contactor KMF (a contactor of model LC1N0910M5N can be used), a reverse contactor KMR (a contactor of model LC1N0910M5N can be used), a forward limit switch LSF1 (a limit switch of model XCKN2145P20C can be used), a reverse limit switch LSR1 (a limit switch of model XCKN2145P20C can be used), and a motor 1 (a motor of model Y2-90L-4 can be used) provided on the soot blower. One end of the contact of the time relay KT1 is electrically connected to one end of the coil of the time relay KT1 and the neutral wire end of the external control power supply 2 respectively. The other end of the coil of the time relay KT1 is electrically connected to the external distributed control system 4, one end of the forward limit switch LSF1, and the live wire end of the external control power supply 2 respectively. The other end of the forward limit switch LSF1 is electrically connected to one end of the auxiliary contact of the reverse contactor KMR. The other end of the auxiliary contact of the reverse contactor KMR is electrically connected to one end of the coil of the forward contactor KMF. The other end of the coil of the forward contactor KMF is electrically connected to the other end of the contact of the time relay KT1 and one end of the coil of the reverse contactor KMR respectively. The other end of the coil of the reverse contactor KMR is electrically connected to one end of the auxiliary contact of the forward contactor KMF. The other end of the auxiliary contact of the forward contactor KMF is electrically connected to one end of the reverse limit switch LSR1. The other end of the reverse limit switch LSR1 is electrically connected to the external distributed control system 4. The motor 1 is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. The motor 1 is used to drive the blow gun for purging operation. The other ends of the main contacts of the forward contactor KMF and the reverse contactor KMR are both electrically connected to the external power supply 3.

[0025] The time relay KT1 is a power-on delay type time relay.

[0026] It further includes a thermal relay FR (a thermal relay of model LRN08N can be used) provided on the soot blower. One end of the coil of the thermal relay FR is electrically connected to the motor 1. The other end of the coil of the thermal relay FR is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. One end of the contact of the thermal relay FR is electrically connected to the other end of the coil of the forward contactor KMF and one end of the coil of the reverse contactor KMR respectively. The other end of the contact of the thermal relay FR is electrically connected to the other end of the contact of the time relay KT1.

[0027] It further includes a control power air switch ZK2 (an air switch with model IC65N-C4A / 2P can be used) provided on the soot blower. One end of the contact of the time relay KT1 and one end of the coil of the time relay KT1 are both electrically connected to the neutral wire end of the external control power supply 2 through the control power air switch ZK2. One end of the forward limit switch LSF1 and the other end of the coil of the time relay KT1 are both electrically connected to the live wire end of the external control power supply 2 through the control power air switch ZK2.

[0028] It further includes a power supply air switch ZK1 (an air switch with model IC65N-D6A / 3P can be used) provided on the soot blower. The other ends of the main contacts of the forward contactor KMF and the other ends of the main contacts of the reverse contactor KMR are both electrically connected to the external power supply 3 through the power supply air switch ZK1.

[0029] It further includes a selection switch GK (a switch with model XB2BD33C can be used), a field gun-in button START (a gun-in button with model XB4BP31 can be used), and a field gun-out button RVS (a gun-out button with model XB4BP42 can be used) provided on the soot blower. The fixed end of the selection switch GK is electrically connected to the live wire end of the external control power supply 2. The two moving ends of the selection switch GK are respectively electrically connected to one end of the field gun-in button START and the external distributed control system 4. The other end of the field gun-in button START is respectively electrically connected to the other end of the coil of the time relay KT1, one end of the forward limit switch LSF1, and the external distributed control system 4. One end of the field gun-out button RVS is respectively electrically connected to the other end of the reverse limit switch LSR1 and the external distributed control system 4.

[0030] The selection switch GK is a three-position selection switch.

[0031] The power supply 3 is a three-phase power supply.

[0032] The control power supply 2 is a 220V AC power supply, and the power supply 3 is a 380V AC power supply.

[0033] Please refer to Figure 2 , the second embodiment of the present invention is: A soot blowing and cleaning method for a soot blowing and cleaning system based on the first embodiment, including the following steps: S1. The distributed control system 4 issues a start command, the coil of the time relay KT1 is energized, and the contact of the time relay KT1 closes; S2. Detect the state of the forward limit switch LSF1 and determine whether the forward limit switch is in a closed state; S3. If the forward limit switch LSF1 is in the closed state, then execute step S4; S4. When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contact of the forward contactor KMF is disconnected, and forms an interlock with the reverse contactor KMR; after the coil of the forward contactor KMF is energized, the motor 1 is energized to rotate forward. The motor 1 drives the blow gun to move forward for one minute and then stops for five minutes and then performs fixed-point purging. This cycle continues until the soot blower touches the forward limit switch LSF1; S5. When the soot blower touches the forward limit switch LSF1, a gun retraction signal is triggered, the coil of the forward contactor KMF is de-energized, the coil of the reverse contactor KMR is energized, the motor 1 rotates in reverse, and the motor 1 drives the blow gun to retract to the initial position; S6. When the blow gun retracts to the initial position, the reverse limit switch LSR1 is disconnected, the coil of the reverse contactor KMR is de-energized, the motor 1 stops running, and the soot blower completes one soot blowing cycle.

[0034] In summary, a soot blowing and cleaning system and method provided by the present invention, by setting a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1 and a motor on the soot blower, controlling the energized state of the time relay KT1 through an external distributed control system, the coil of the time relay KT1 is energized, and the contact of the time relay KT1 is closed; detecting the state of the forward limit switch LSF1 and judging whether the forward limit switch is in the closed state; when the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contact of the forward contactor KMF is disconnected, and forms an interlock with the reverse contactor KMR; after the coil of the forward contactor KMF is energized, the motor is energized to rotate forward. The motor drives the blow gun to move forward for one minute and then stops for five minutes and then performs fixed-point purging. This cycle continues until the soot blower touches the forward limit switch LSF1; when the soot blower touches the forward limit switch LSF1, a gun retraction signal is triggered, the coil of the forward contactor KMF is de-energized, the coil of the reverse contactor KMR is energized, the motor rotates in reverse, and the motor drives the blow gun to retract to the initial position; when the blow gun retracts to the initial position, the reverse limit switch LSR1 is disconnected, the coil of the reverse contactor KMR is de-energized, the motor stops running, and the soot blower completes one soot blowing cycle; adopting the above purging method, the motor can drive the blow gun to move forward for one minute and then stop for five minutes and then perform fixed-point purging. In this way, the soot blower can perform intermittent and discontinuous purging operations during operation, which can better disperse the dust on the surface and take it away, can avoid the phenomenon of blockage, and can also improve the purging effect and increase the flow area.

[0035] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A soot blowing and cleaning system, characterized in that, It includes a time relay KT1, a forward contactor KMF, a reverse contactor KMR, a forward limit switch LSF1, a reverse limit switch LSR1 and a motor provided on the soot blower. One end of the contact of the time relay KT1 is electrically connected to one end of the coil of the time relay KT1 and the neutral wire end of the external control power supply respectively. The other end of the coil of the time relay KT1 is electrically connected to the external distributed control system, one end of the forward limit switch LSF1 and the live wire end of the external control power supply respectively. The other end of the forward limit switch LSF1 is electrically connected to one end of the auxiliary contact of the reverse contactor KMR. The other end of the auxiliary contact of the reverse contactor KMR is electrically connected to one end of the coil of the forward contactor KMF. The other end of the coil of the forward contactor KMF is electrically connected to the other end of the contact of the time relay KT1 and one end of the coil of the reverse contactor KMR respectively. The other end of the coil of the reverse contactor KMR is electrically connected to one end of the auxiliary contact of the forward contactor KMF. The other end of the auxiliary contact of the forward contactor KMF is electrically connected to one end of the reverse limit switch LSR1. The other end of the reverse limit switch LSR1 is electrically connected to the external distributed control system. The motor is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. The motor is used to drive the blowing gun for purging operation. The other ends of the main contacts of the forward contactor KMF and the reverse contactor KMR are both electrically connected to the external power supply.

2. The soot blowing and cleaning system according to claim 1, wherein The time relay KT1 is a power-on delay type time relay.

3. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a thermal relay FR provided on the soot blower. One end of the coil of the thermal relay FR is electrically connected to the motor. The other end of the coil of the thermal relay FR is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the reverse contactor KMR respectively. One end of the contact of the thermal relay FR is electrically connected to the other end of the coil of the forward contactor KMF and one end of the coil of the reverse contactor KMR respectively. The other end of the contact of the thermal relay FR is electrically connected to the other end of the contact of the time relay KT1.

4. The soot blowing and cleaning system according to claim 1, wherein It also includes a control power air switch ZK2 provided on the soot blower. One end of the contact of the time relay KT1 and one end of the coil of the time relay KT1 are both electrically connected to the neutral wire end of the external control power supply through the control power air switch ZK2. One end of the forward limit switch LSF1 and the other end of the coil of the time relay KT1 are both electrically connected to the live wire end of the external control power supply through the control power air switch ZK2.

5. The soot blowing and cleaning system according to claim 1, wherein, It also includes a power supply air switch ZK1 provided on the soot blower. The other ends of the main contacts of the forward contactor KMF and the reverse contactor KMR are both electrically connected to the external power supply through the power supply air switch ZK1.

6. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a selection switch GK, a field gun-in button START, and a field gun-out button RVS provided on the soot blower. The stationary terminal of the selection switch GK is electrically connected to the live wire terminal of the external control power supply. The two moving terminals of the selection switch GK are respectively electrically connected to one end of the field gun-in button START and the external distributed control system. The other end of the field gun-in button START is respectively electrically connected to the other end of the coil of the time relay KT1, one end of the forward limit switch LSF1, and the external distributed control system. One end of the field gun-out button RVS is respectively electrically connected to the other end of the reverse limit switch LSR1 and the external distributed control system.

7. The soot blowing and cleaning system according to claim 6, wherein, The selection switch GK is a three-position selection switch.

8. The sootblowing cleaning system according to claim 1, characterized in that The power supply is a three-phase power supply.

9. The sootblowing cleaning system according to claim 1, wherein The control power supply is a 220V AC power supply, and the power supply is a 380V AC power supply.

10. A soot blowing and cleaning method for a soot blowing and cleaning system according to any one of claims 1-9, characterized in that, It includes the following steps: S1. The distributed control system issues a start command, the coil of the time relay KT1 is energized, and the contacts of the time relay KT1 are closed. S2. Detect the state of the forward limit switch LSF1 and determine whether the forward limit switch is in the closed state. S3. If the forward limit switch LSF1 is in the closed state, execute step S4. S4. When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is energized, the auxiliary contacts of the forward contactor KMF are opened, and an interlock is formed with the reverse contactor KMR. After the coil of the forward contactor KMF is energized, the motor is energized to rotate forward. The motor drives the soot blower gun to move forward for one minute and then stops for five minutes before performing fixed-point purging. This cycle continues until the soot blower touches the forward limit switch LSF1. S5. When the soot blower touches the forward limit switch LSF1, a gun-out signal is triggered. The coil of the forward contactor KMF is de-energized, the coil of the reverse contactor KMR is energized, the motor rotates in reverse, and the motor drives the soot blower gun to retract to the initial position. S6. When the soot blower gun retracts to the initial position, the reverse limit switch LSR1 is opened, the coil of the reverse contactor KMR is de-energized, the motor stops running, and the soot blower completes one soot blowing cycle.

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