An intelligent fan rotor online dust cleaning device

Abstract

The present invention discloses an intelligent online dust cleaning device for fan rotors, comprising a liquid source, a compressed gas source, an electrical control system, a gas-liquid control cabinet, a control cable and a gas-liquid composite nozzle. The liquid source and the compressed gas source both have a certain pressure, and the pressure of the compressed gas source is greater than that of the liquid source. A gas inlet and a liquid inlet are arranged on the gas-liquid composite nozzle. The liquid source and the compressed gas source are respectively connected with the liquid inlet and the gas inlet on the gas-liquid composite nozzle through pipelines. The electrical control system and the gas-liquid control cabinet are respectively used for controlling the compressed gas source and the liquid source. The acute angle formed by the gas inlet axis and the liquid inlet axis on the gas-liquid composite nozzle is θ1. The present invention can block dust accumulation on the fan rotor and clean up dust adhered to the surface in time, and can realize online dust cleaning without stopping the fan rotor and the equipment, thereby extending the service life of the fan rotor.

Description

Technical Field

[0001] The invention relates to a dust cleaning device, in particular to an intelligent online dust cleaning device for a fan rotor. Background Art

[0002] Dust removal fans, boiler induced draft fans, gas booster fans, gas recovery fans and other fans that transport dusty gases will have their rotors covered with dust after a period of operation. Different parts may get covered with dust at different speeds or the adhered dust blocks may fall off unevenly, which often causes the dynamic balance of the rotor to deteriorate, causing the fan system to vibrate beyond the standard and fail to work normally. In severe cases, the fan and motor may be damaged, and there may even be serious equipment and safety accidents such as rotor flying out, blade breakage and motor burning. At present, there is no effective solution to prevent dust from sticking to fan rotors and to clean them online in time. Fan rotors are all allowed to accumulate dust and are shut down for dynamic balancing after the dynamic balance is destroyed. Generally, fan rotors have a short service life, a long processing time and high cost. Summary of the invention

[0003] In view of the above problems, an intelligent online dust cleaning device for fan rotor is proposed, which includes a liquid source, a compressed gas source, an electrical control system, a gas-liquid control cabinet, a control cable and a gas-liquid composite nozzle. The liquid source and the compressed gas source both have a certain pressure, and the pressure of the compressed gas source is greater than that of the liquid source. A gas inlet and a liquid inlet are arranged on the gas-liquid composite nozzle. The liquid source and the compressed gas source are connected to the liquid inlet and the gas inlet on the gas-liquid composite nozzle through pipelines, respectively. The electrical control system and the gas-liquid control cabinet are used to control the compressed gas source and the liquid source, respectively. The acute angle formed by the gas inlet axis and the liquid inlet axis on the gas-liquid composite nozzle is θ1;

[0004] In the present technical scheme, both the liquid source and the compressed gas source have a certain pressure, and the pressure of the compressed gas source is greater than that of the liquid source. The liquid source and the compressed gas source are connected to the liquid inlet and the gas inlet on the gas-liquid composite nozzle through pipelines respectively. The electrical control system controls the opening or closing of the solenoid valve, so that a part of the gas-liquid composite nozzle works continuously, mainly playing the role of fluid adhering to the surface of the fan rotor to block dust accumulation, and the other part of the gas-liquid composite nozzle works intermittently to form a pulsating switch, which is cyclically carried out to form a pulse impact force and a pulse bubble bursting effect on the surface, and the dust cleaning effect is more obvious. The electrical control system can control the gas-liquid composite nozzle to operate synchronously with the fan rotor, and blow online to always keep the fan at a low dust accumulation. The blown dust does not affect the dynamic balance of the fan and will not affect the normal operation of the equipment.

[0005] The technical solution further defined in the present invention is:

[0006] The gas-liquid control cabinet includes a cabinet body, a solenoid valve, a main liquid pipe, a main gas pipe, a liquid distribution pipe, a gas distribution pipe, a liquid pressure gauge, a gas pressure gauge, a liquid filter, a liquid inlet valve and a gas inlet valve. The liquid inlet valve and the gas inlet valve are both installed on the inside or outside of the cabinet inlet and are respectively connected to the pipelines of the main liquid pipe and the main gas pipe. The liquid inlet valve and the gas inlet valve can be used to control the liquid and compressed gas entering the pipeline. A liquid filter is arranged on the main liquid pipe and between the liquid pressure gauge and the liquid inlet valve. The liquid filter can effectively purify the liquid and increase the service life of the device.

[0007] Corresponding liquid pressure gauges and gas pressure gauges are installed on the main liquid pipe and the main gas pipe and inside the cabinet. The liquid pressure gauge and the gas pressure gauge are connected to the electrical control system through control cables and send corresponding pressure signals to the electrical control system. A plurality of liquid distribution pipes and gas distribution pipes are installed at one end of the main liquid pipe and the main gas pipe away from the liquid source and the compressed gas source, respectively. A corresponding solenoid valve is installed on each of the liquid distribution pipes and the gas distribution pipes. The solenoid valve is connected to the electrical control system through control cables and is controlled by the control cable. The ends of the liquid distribution pipe and the gas distribution pipe are connected to the gas-liquid composite nozzle;

[0008] The gas-liquid composite nozzle comprises an installation interface, a main cavity, a sub-cavity, a composite cavity, an acceleration cavity, a nozzle and an air induction groove. The installation interface is connected with the gas distribution pipe, the main cavity is introduced with compressed gas, the sub-cavity is connected with the liquid distribution pipe and is introduced with liquid, the compressed gas and liquid are compounded into a gas-liquid two-phase mixed fluid in the composite cavity, the gas-liquid two-phase mixed fluid is accelerated into a high-speed two-phase mixed fluid through the acceleration cavity and is ejected from the nozzle at a high speed, the main cavity is composed of a guide section R1, an expansion section D1, a contraction section R2, a second guide section R3 and a stabilization section D2, and the two adjacent sections are tangently transitioned at the junction, the expansion section D1 and the stabilization section D2 are cylindrical, D2<D1, and the cross-sections of the other sections are all arc surfaces, the sub-cavity is composed of a liquid introduction section D3 and a liquid cut-in section D4, the liquid introduction section D3 and the liquid cut-in section D4 are cylindrical, the liquid introduction section D3 and the liquid cut-in section D4 are The center of segment D4 intersects at point A1, and point A1 is on the end face of one end of the length direction of the liquid entry segment D4. The outermost intersection point of the liquid entry segment D4 and the nozzle is A3, and the intersection point A3 is located on the line connecting the nozzle edge point A2 and the nozzle center point A4, and the intersection point A3 is between point A4 and point A2. The acceleration chamber increases in size toward the ejection direction and becomes conical, and the cone angle θ2 is between 0 and 10°. The air induction grooves are distributed in a circular distribution on the outer side of the gas-liquid composite nozzle. The high-speed two-phase mixed fluid strikes the surface of the fan rotor, which will form a huge striking force on the larger pieces of existing dust accumulation, breaking the dust accumulation on the surface and making it fall off, thereby playing a role in cleaning. In addition, the high-speed two-phase mixed fluid will separate the gas on the surface of the fan rotor again to form bubble explosion, and the microscopic surface tangential force formed by the explosion will remove the dust on the surface;

[0009] The spraying direction of the nozzle is aimed at the dust accumulation surface of the fan rotor. The two gas-liquid compound nozzles are installed in pairs and are symmetrically arranged. The plane formed by the axis of the gas-liquid compound nozzle and the axis of the liquid distribution pipe is parallel to the main shaft center line of the fan rotor or the angle β is an acute angle less than 45°. The gas-liquid compound nozzles are symmetrically arranged, and the spraying direction is in the same plane. The paired nozzles offset the reaction force of the spraying, which makes it easy to fix the gas distribution pipe and the liquid distribution pipe on the one hand, and reduces the vibration effect on the fan rotor on the other hand;

[0010] The air distribution pipe and the liquid distribution pipe are fixed to the fan housing or the fan inlet pipe through flanges. Check valves are installed at the positions where the air distribution pipe and the liquid distribution pipe enter the fan housing, which effectively fixes the air distribution pipe and the liquid distribution pipe;

[0011] The liquid in the liquid source is industrial clean water which has low affinity with the adhered dust and contains less soluble impurities and insoluble impurities. The liquid with low affinity with the dust in the wind transported by the fan is used. After the liquid adheres to the surface of the fan rotor, the fluid will separate the fan rotor and the dust. The dust and the liquid with low affinity are not easy to adhere together, thereby preventing dust from accumulating on the fan rotor.

[0012] The beneficial effects of the present invention are:

[0013] The high-speed two-phase mixed fluid greatly reduces the dust accumulation rate of the fan. After the liquid adheres to the surface of the fan rotor, it plays a role in blocking the dust accumulation of the fan rotor, which prolongs the continuous use time of the fan while greatly increasing the probability of serious equipment and safety accidents such as rotor flying out, blade breakage and motor burning caused by sudden shedding of large pieces of dust on the fan rotor. The safety of the fan rotor is greatly improved, and the dust accumulation on the surface of the fan rotor is cleaned in time, which can not only increase the continuous use time of the fan and improve the safety of the rotor, but also improve the working efficiency of the fan. The cleaning is carried out simultaneously with the operation of the fan, and the online blowing is carried out. The cleaning process does not affect the operation of the fan, and the fan operation rate is greatly improved. The cleaning process has little effect on the operation of the equipment. The gas-liquid composite nozzles are arranged in pairs, and the spraying direction is in one plane. The paired nozzles offset the reaction force of the spraying. On the one hand, the air pipe and the leaf pipe are easy to fix. On the other hand, the high-speed two-phase mixed fluid has little effect on the vibration of the fan rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the system principle diagram of the present invention;

[0015] Figure 2 and Figure 7 It is the installation schematic diagram of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the gas-liquid control cabinet of the present invention;

[0017] Figure 4 and Figure 8 It is a schematic diagram of the structure of the gas-liquid composite nozzle of the present invention;

[0018] Figure 5 It is a schematic diagram of the installation of the gas-liquid composite nozzle of the present invention;

[0019] Figure 6 It is a schematic diagram of the installation of the gas distribution pipe and the liquid distribution pipe of the present invention;

[0020] Among them: 1-liquid source, 2-compressed gas source, 3-electrical control system, 4-gas-liquid control cabinet, 5-control cable, 6-check valve, 7-fan, 8-gas-liquid composite nozzle, 9-flange, 41-cabinet, 42-solenoid valve, 43-main liquid pipe, 44-main gas pipe, 45-liquid distribution pipe, 46-gas distribution pipe, 47-liquid pressure gauge, 48-gas pressure gauge, 49-liquid filter, 410-liquid inlet valve, 411-gas inlet valve, 71-fan casing, 72-fan inlet pipe, 73-fan rotor, 74-dust accumulation surface, 81-installation interface, 82-main chamber, 83-sub-chamber, 84-compound chamber, 85-acceleration chamber, 86-nozzle, 87-air induction groove, 88-compressed gas, 89-liquid, 810-two-phase mixed fluid. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance;

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, it can be the internal communication of two elements, and for ordinary technicians in the field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances;

[0024] Example 1

[0025] This embodiment provides an intelligent online dust cleaning device for fan rotors. The fan is a converter gas fan, and the conveying gas is converter gas. The motor power is 2240kW, the rated speed is 1488 rpm, and the speed is controlled by a frequency converter. According to the process requirements, the high and low speeds are operated alternately. The high speed operation speed is 1400 rpm. Generally, it will run continuously for 45 minutes and then switch to low speed operation. The low speed operation speed is 600 rpm, and it will run continuously for 15 minutes and then switch to high speed operation, and so on. Because coal gas contains a lot of dust and moisture, the fan rotor is prone to dust accumulation before the installation of the intelligent online dust cleaning device for fan rotors of the present invention. It needs to be shut down every 2-5 days to clean the dust on the rotor.

[0026] To this end, the present embodiment provides an intelligent online dust cleaning device for fan rotors to solve the above-mentioned dust accumulation and online dust cleaning problems of fan rotors, including a liquid source 1, a compressed gas source 2, an electrical control system 3, a gas-liquid control cabinet 4, a control cable 5 and a gas-liquid composite nozzle 8. The liquid source 1 and the compressed gas source 2 both have a certain pressure, and the pressure of the compressed gas source 2 is greater than the pressure of the liquid source 1. A gas inlet and a liquid inlet are provided on the gas-liquid composite nozzle 8. The liquid source 1 and the compressed gas source 2 are respectively connected to the liquid inlet and the gas inlet on the gas-liquid composite nozzle 8 through pipelines. The electrical control system 3 and the gas-liquid control cabinet 4 are respectively used to control the compressed gas source 2 and the liquid source 1. The acute angle formed by the gas inlet axis and the liquid inlet axis on the gas-liquid composite nozzle 8 is θ1;

[0027] The gas-liquid control cabinet 4 includes a cabinet body 41, a solenoid valve 42, a main liquid pipe 43, a main gas pipe 44, a liquid distribution pipe 45, a gas distribution pipe 46, a liquid pressure gauge 47, a gas pressure gauge 48, a liquid filter 49, a liquid inlet valve 410 and a gas inlet valve 411. The liquid inlet valve 410 and the gas inlet valve 411 are both installed on the inner side of the entrance of the cabinet body 41 and are respectively connected to the pipelines of the main liquid pipe 43 and the main gas pipe 44. A liquid filter 49 is arranged on the main liquid pipe 43 and between the liquid pressure gauge 47 and the liquid inlet valve 410. The liquid filter can effectively purify the liquid and improve the service life of the device. Corresponding liquid pressure gauges 47 and gas pressure gauges 48 are installed inside the cabinet 41. The liquid pressure gauges 47 and gas pressure gauges 48 are connected to the electrical control system 3 through control cables 5 and send corresponding pressure signals to the electrical control system 3. A plurality of liquid distribution pipes 45 and gas distribution pipes 46 are installed at one end of the main liquid pipe 43 and the main gas pipe 44 away from the liquid source 1 and the compressed gas source 2. A corresponding solenoid valve 42 is installed on each of the liquid distribution pipes 45 and the gas distribution pipes 46. The solenoid valves 42 are connected to the electrical control system 3 through control cables 5 and are controlled by the electrical control system 3. The ends of the liquid distribution pipes 45 and the gas distribution pipes 46 are connected to the gas-liquid composite nozzles 8.

[0028] The gas-liquid composite nozzle 8 includes an installation interface 81, a main cavity 82, a sub-cavity 83, a composite cavity 84, an acceleration cavity 85, a nozzle 86 and an air induction groove 87. The installation interface 81 is connected to the gas distribution pipe 46, and the main cavity 82 is introduced with compressed gas 88. The sub-cavity 83 is connected to the liquid distribution pipe 45 and is introduced with liquid 89. The compressed gas 88 and the liquid 89 are compounded into a gas-liquid two-phase mixed fluid 810 in the composite cavity 84. The gas-liquid two-phase mixed fluid 810 is accelerated into a high-speed two-phase mixed fluid 810 through the acceleration cavity 85 and is ejected from the nozzle 86 at a high speed. The main cavity 82 is composed of a guide section R1, an expansion section D1, a contraction section R2, a second guide section R3 and a stabilization section D2, and the two adjacent sections are tangently transitioned at the junction. The expansion section D1 and the stabilization section D2 are cylindrical, D2<D1, and the cross-sections of the other sections are all arc surfaces. The sub-cavity 83 is composed of a liquid introduction section D3 and a liquid cut-in section D4. The liquid introduction section D3 and the liquid The body cutting section D4 is cylindrical, the liquid introduction section D3 and the center of the liquid cutting section D4 intersect at point A1, and point A1 is on the end face of one end of the length direction of the liquid cutting section D4, the outermost intersection of the liquid cutting section D4 and the nozzle is A3, and the intersection A3 is located on the line connecting the nozzle edge point A2 and the nozzle center point A4, and the intersection A3 is between point A4 and point A2, the acceleration chamber 85 increases in size toward the ejection direction and becomes conical, and the cone angle θ2 is between 0 and 10°, and the air induction grooves 87 are distributed on the outer side of the gas-liquid composite nozzle 3 in a circumferential distribution, and the two-phase mixed fluid 810 strikes the surface of the fan rotor, which will form a huge striking force for larger pieces of existing dust accumulation, break the dust accumulation on the surface, make it fall off, and play a role in cleaning dust. In addition, the gas of the two-phase mixed fluid 810 on the surface of the fan rotor will separate again to form bubbles and burst, and the microscopic surface tangential force formed by the explosion will remove the dust on the surface;

[0029] The spraying direction of the nozzle 86 is aligned with the dust accumulation surface 74 of the fan rotor 73. The two gas-liquid compound nozzles 8 are installed in pairs and are symmetrically arranged. The plane formed by the axis of the gas-liquid compound nozzle 8 and the axis of the liquid distribution pipe 45 is parallel to the main shaft centerline of the fan rotor. The gas-liquid compound nozzles 8 are symmetrically arranged, and the spraying directions are in the same plane. The paired nozzles offset the reaction force of the spraying. On the one hand, it is easy to fix the air distribution pipe 46 and the liquid distribution pipe 45, and on the other hand, it reduces the vibration effect on the fan rotor. The air distribution pipe 46 and the liquid distribution pipe 45 are fixed to the fan housing 71 by flanges 9. The positions where the air distribution pipe 46 and the liquid distribution pipe 45 enter the fan housing 71 are correspondingly installed with check valves 7, which effectively fix the air distribution pipe 46 and the liquid distribution pipe 45.

[0030] The liquid source 1 is industrial clean water with a pressure of 0.5MPa, 1 set of compressed gas source, the compressed gas source 2 is 2MPa nitrogen, the electrical control system 3 and the gas-liquid control cabinet 4 are installed independently and set in the control room, 120m away from the gas-liquid control cabinet 2, and the gas-liquid control cabinet 4 is set at a distance of 7m from the fan 7.

[0031] The working process of this embodiment:

[0032] Industrial clean water with low affinity to dust in the wind transported by the fan is used. After the industrial clean water adheres to the surface of the fan rotor, the fluid will separate the fan rotor and the dust. The dust and industrial clean water are not easy to adhere together, which blocks the dust accumulation of the fan rotor. The high-speed two-phase mixed fluid hits the surface of the fan rotor, which will form a huge impact force on the larger pieces of existing dust accumulation, breaking the dust accumulation on the surface and making it fall off. In addition, the gas of the high-speed two-phase mixed fluid will be separated again on the surface of the fan rotor to form bubble explosion. The microscopic surface tangential force formed by the explosion will remove the dust on the surface. The electrical control system controls the opening or closing of the solenoid valve, so that a part of the gas-liquid composite nozzle works continuously, and the other part of the gas-liquid composite nozzle works intermittently to form a pulsating switch, which is cyclical, forming a pulse impact force and a pulse bubble bursting effect on the surface. The electrical control system can control the gas-liquid composite nozzle to operate synchronously with the fan rotor, and blow online to always keep the dust accumulation of the fan low. The blown dust does not affect the dynamic balance of the fan and the normal operation of the equipment.

[0033] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. An intelligent fan rotor online dust cleaning device, characterized in that: The device comprises a liquid source (1), a compressed gas source (2), an electrical control system (3), a gas-liquid control cabinet (4), a control cable (5) and a gas-liquid composite nozzle (8); the liquid source (1) and the compressed gas source (2) both have a certain pressure, and the pressure of the compressed gas source (2) is greater than the pressure of the liquid source (1); a gas inlet and a liquid inlet are provided on the gas-liquid composite nozzle (8); the liquid source (1) and the compressed gas source (2) are respectively connected to the liquid inlet and the gas inlet on the gas-liquid composite nozzle (8) through pipelines; the electrical control system (3) and the gas-liquid control cabinet (4) are respectively used to control the compressed gas source (2) and the liquid source (1); the acute angle formed by the gas inlet axis and the liquid inlet axis on the gas-liquid composite nozzle (8) is θ1; The gas-liquid composite nozzle (8) comprises a mounting interface (81), a main chamber (82), a secondary chamber (83), a composite chamber (84), an acceleration chamber (85), a nozzle (86) and an air induction groove (87); the mounting interface (81) is connected to the gas distribution pipe (46); the main chamber (82) is supplied with compressed gas (88); the secondary chamber (83) is connected to the liquid distribution pipe (45) and is supplied with liquid (89); the compressed gas (88) and the liquid (89) are combined in the composite chamber (84) to form a gas-liquid two-phase mixed fluid (810); the gas-liquid two-phase mixed fluid (810) is accelerated by the acceleration chamber (85) to form a high-speed gas-liquid two-phase mixed fluid (810) and is ejected from the nozzle (86) at a high speed; the main chamber (82) is composed of a guide section R1, an expansion section D1, a contraction section R2, a second guide section R3 and a stabilization section D2; and Two adjacent sections are tangently transitioned at the junction, the expansion section D1 and the stabilization section D2 are cylindrical, D2<D1, and the cross-sections of the remaining sections are arc surfaces, the auxiliary cavity (83) is composed of a liquid introduction section D3 and a liquid cut-in section D4, the liquid introduction section D3 and the liquid cut-in section D4 are cylindrical, the centers of the liquid introduction section D3 and the liquid cut-in section D4 intersect at point A1, and point A1 is on the end surface of one end of the length direction of the liquid cut-in section D4, the outermost intersection point of the liquid cut-in section D4 and the nozzle is A3, and the intersection point A3 is located on the line connecting the nozzle edge point A2 and the nozzle center point A4, and the intersection point A3 is between point A4 and point A2, the acceleration cavity (85) increases in size toward the ejection direction and becomes conical, and the cone angle θ2 is between 0 and 10 degrees, and the air induction grooves (87) are distributed on the outer side of the gas-liquid composite nozzle (8) in a circumferential distribution.

2. The intelligent online dust cleaning device for fan rotor according to claim 1 is characterized in that: The gas-liquid control cabinet (4) comprises a cabinet body (41), a solenoid valve (42), a main liquid pipe (43), a main gas pipe (44), a liquid distribution pipe (45), a gas distribution pipe (46), a liquid pressure gauge (47), a gas pressure gauge (48), a liquid filter (49), a liquid inlet valve (410) and a gas inlet valve (411); the liquid inlet valve (410) and the gas inlet valve (411) are both installed on the inside or outside of the inlet of the cabinet body (41) and are respectively connected to the pipelines of the main liquid pipe (43) and the main gas pipe (44); and a liquid filter (49) is provided on the main liquid pipe (43) and between the liquid pressure gauge (47) and the liquid inlet valve (410); A corresponding liquid pressure gauge (47) and a gas pressure gauge (48) are installed on the main liquid pipe (43) and the main gas pipe (44) and are located inside the cabinet (41). The liquid pressure gauge (47) and the gas pressure gauge (48) are connected to the electrical control system (3) via a control cable (5) and send corresponding pressure signals to the electrical control system (3). A plurality of liquid distribution pipes (45) and gas distribution pipes (46) are installed at one end of the main liquid pipe (43) and the main gas pipe (44) away from the liquid source (1) and the compressed gas source (2). A corresponding solenoid valve (42) is installed on each of the liquid distribution pipes (45) and the gas distribution pipes (46). The solenoid valve (42) is connected to the electrical control system (3) via a control cable (5) and is controlled by the control cable. The ends of the liquid distribution pipes (45) and the gas distribution pipes (46) are connected to a gas-liquid composite nozzle (8).

3. The intelligent online dust cleaning device for fan rotor according to claim 1 is characterized in that: The spraying direction of the nozzle (86) is aligned with the dust accumulation surface (74) of the fan rotor (73), the two gas-liquid composite nozzles (8) are installed in pairs and are arranged symmetrically with each other, and the plane formed by the axis of the gas-liquid composite nozzle (8) and the axis of the liquid distribution pipe (45) is parallel to the main shaft centerline of the fan rotor or the angle β is an acute angle less than 45°.

4. The intelligent online dust cleaning device for fan rotor according to claim 2 is characterized in that: The air distribution pipe (46) and the liquid distribution pipe (45) are both fixed to the fan housing (71) or the fan inlet pipe (72) via flanges (9), and check valves (7) are installed corresponding to the positions where the air distribution pipe (46) and the liquid distribution pipe (45) enter the fan housing (71).

5. The intelligent online dust cleaning device for fan rotor according to claim 1 is characterized in that: The liquid (89) of the liquid source (1) is industrial clean water having low affinity with the adhered dust and containing less soluble impurities and insoluble impurities.

6. The intelligent online dust cleaning device for fan rotor according to claim 1 is characterized in that: The acute angle θ1 is 30°-70°.

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