CN113617726A

CN113617726A - Online ash removal device for high-speed rotor

Info

Publication number: CN113617726A
Application number: CN202110914104.3A
Authority: CN
Inventors: 危中良; 黄忠念; 廖天阳; 刘钦伟; 戴金华; 刘振辉; 杨定生
Original assignee: Nanjing Magnet Intelligent Technology Co ltd
Current assignee: Nanjing Magnet Intelligent Technology Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-11-09

Abstract

The invention discloses a high-speed rotor online ash removal device which comprises an impeller, a main nozzle, an auxiliary nozzle, a main water and air supply path assembly, a water and air supply control cabinet, a remote control cabinet, a compressed nitrogen nozzle and a water and air supply path assembly. The main spray head and the compressed nitrogen spray head are both arranged at the inlet of the fan reducing pipeline, the auxiliary spray head is arranged at the front end of the necking flange at the front end of the impeller inlet, and the auxiliary spray head sprays water mist in the advancing direction of the wind speed; the water and gas supply control cabinet controls the spraying and cleaning rhythm of the main spray head, the compressed nitrogen spray head and the auxiliary spray head, and the stainless steel impeller with passivated surface rotates at high speed while cleaning.

Description

Online ash removal device for high-speed rotor

Technical Field

The invention relates to an online ash removal device for a high-speed rotor.

Background

The blast furnace, converter and coke oven gas recovery fan and the pressurization fan are an important link for recycling the gas of the iron and steel enterprises. The gas recycling and conveying device utilizes the blower to improve the pressure and the flow rate of the gas to realize the recycling and conveying of the gas and meet the requirements of users.

The coal gas has more complex chemical components and more ash content. Because of the continuity of production, the gas fan generally needs to continuously run for 24 hours, and the more the gas quantity conveyed in an accumulated way, the more the dust is attached to the impeller. Which contains moisture and acid gases such as SO2, HCl, CO2, etc. Even if the dust removal and purification system of converter gas has an excellent effect, dust still remains and still can be adhered to the impeller for a long time, and once the dust is seriously hung, the working efficiency of the fan is influenced, and the energy consumption is increased. More importantly, when the deposited dust is not uniform or falls off locally and suddenly, the dynamic balance state is deteriorated, the vibration is increased, and the operation safety of the equipment is influenced. If the large block of accumulated dust falls off, even equipment accidents of blade breakage or casing breakage are possibly caused, and certain potential safety hazards exist. Frequent cleaning affects the production progress to a certain extent. Generally, when the axial vibration value reaches a certain value, potential safety hazards are generated, and shutdown for dust removal is needed.

Disclosure of Invention

The invention provides an online ash removal device for a high-speed rotor, which adopts the following technical scheme:

a high-speed rotor online ash removal device comprises an impeller, a main spray head, an auxiliary spray head, a compressed nitrogen spray head, a water and air supply pipeline, a water and air supply main path assembly, a water and air supply control cabinet and a remote control cabinet,

the main spray head and the compressed nitrogen spray head are arranged at the inlet of the fan reducing pipeline, the main spray head is arranged at a position close to the impeller, the central axis of the main spray head is overlapped with the central axis of the impeller, and the main spray head sprays water to the inner side surface of the front disc, the inner side surface of the rear disc, the blade basin surface of the blade, the blade back surface of the blade and the inner wall of the inlet of the fan inlet channel at the same time; the compressed nitrogen nozzle is arranged at a position close to the impeller, and the compressed nitrogen nozzle sprays air to the blade basin surface of the blade and the blade back surface of the blade on the impeller;

the auxiliary nozzle is arranged at the front end of the necking flange at the front end of the inlet of the impeller, and sprays water mist to the advancing direction of the wind speed;

the main spray head, the auxiliary spray head and the compressed nitrogen spray head are assembled and installed through a water and gas supply main path, and the water and gas supply control cabinet is electrically connected with the remote control cabinet and is operated and controlled by the remote control cabinet; the water and gas supply control cabinet is assembled and connected with the main water and gas supply road through a cable to control the control components of the main water and gas supply road;

the water and air supply control cabinet is internally provided with a water and air supply control element, and the remote control cabinet is internally provided with a PLC, a touch screen and other electrical components;

the water supply and air supply pipeline connects the main spray head, the auxiliary spray head, the main water and air supply pipeline assembly, the water and air supply control cabinet, the compressed nitrogen spray head, the external water source and the external air source together to form a water passage or an air passage, and the water or the air is introduced into the reducing pipeline of the fan through the connecting flange.

Preferably, the impeller comprises a front disc, a rear disc and a plurality of blades, the front disc is parallel to the rear disc, the plurality of blades are uniformly distributed between the front disc and the rear disc, and a fan inlet channel is vertically arranged on the outer side surface of the rear disc in an extending manner; stainless steel plates are welded on the inner side face of the front disc, the inner side face of the rear disc, the blade basin face of the blade, the blade back face of the blade and the inner wall of the inlet channel of the fan, and surface passivation treatment is carried out. The stainless steel is subjected to comprehensive acid pickling passivation treatment, dirt such as various oil stains, rust, oxide skins, welding spots and the like is removed, the surface becomes uniform silvery white after treatment, and the corrosion resistance of the stainless steel is greatly improved.

The technical proposal of the invention is preferably that the thickness of the stainless steel plate is 0.5-5 mm. The thickness of the stainless steel plate is selected according to the size of the fan, and the stainless steel plate is welded through ultrasonic spot welding.

Preferably, the main nozzle comprises a central nozzle, a main nozzle, at least one opening edge nozzle and at least one blade back blade basin nozzle, wherein the main nozzle is connected with a connecting flange, the main nozzle is arranged in the variable diameter pipeline of the fan, and the connecting flange is arranged on a shell of the variable diameter pipeline of the fan;

the central nozzle is arranged at the most front end of the main nozzle, the central nozzle is coaxial with the main nozzle, the vertical distance L1 between the jet orifice of the central nozzle and the edge of the impeller is larger than or equal to 2mm, and L1 is larger than or equal to 2 mm; the central nozzle is opposite to the central axis of the impeller; the central nozzle is a hollow conical scattering nozzle, the scattering angle alpha 3 is 45-90 degrees, and the hollow angle alpha 3 is 10-40 degrees;

all the ports are obliquely arranged on the outer wall of the front section of the main spray pipe along the nozzle, acute angles theta 2 are formed between the central axis of the ports along the nozzle and the central axis of the impeller, all the ports are uniformly distributed along the nozzle, and the ports are aligned to the inner wall of the inlet of the fan inlet channel of the impeller along the nozzle; the nozzle edge is a solid nozzle, and the injection angle alpha 1 is 10-45 degrees;

all the blade back blade basin nozzles are obliquely arranged on the outer wall of the front section of the main nozzle, all the blade back blade basin nozzles are uniformly distributed, and all the blade back blade basin nozzles and all the port edge nozzles are alternately arranged; the mouth edge nozzle is positioned between the central nozzle and the blade back blade basin nozzle; an acute angle theta 1 is formed between the central axis of the blade back blade basin nozzle and the central axis of the impeller, theta 2 is larger than theta 1, and the blade back blade basin nozzle is aligned with the blade basin surface and the blade back surface of the upper blade of the impeller; the nozzle of the leaf basin on the back of the leaf is a solid nozzle, and the spraying angle alpha 2 is 5-30 degrees; alpha 1 is more than or equal to alpha 2.

According to the invention, a central nozzle in a main spray head is aligned to the central line of a stainless steel impeller with a passivated surface to spray water, a port is aligned to the inner wall of an inlet of a fan inlet channel of the impeller along the nozzle to spray water, and a blade back and blade basin nozzle is aligned to the blade basin surface and the blade back surface of an upper blade of the impeller to spray water; the main spray head is arranged to spray water to the impeller from a plurality of angles, and the ash can be removed by combining the high-speed rotation of the impeller, so that the coal ash attached to the impeller can be effectively avoided.

Preferably, the compressed nitrogen nozzle comprises a nitrogen nozzle and a nitrogen spray pipe, the nitrogen nozzle is arranged at the foremost end of the nitrogen spray pipe, the nitrogen spray pipe is connected with a connecting flange, the nitrogen spray pipe is arranged inside the fan reducing pipeline, and the connecting flange is arranged on a shell of the fan reducing pipeline; the nitrogen nozzle is aligned with the blade basin surface and the blade back surface of the upper blade of the impeller.

Preferably, the auxiliary spray head comprises an atomizing spray head and an atomizing spray pipe, the atomizing spray head is arranged at the foremost end of the atomizing spray pipe, the atomizing spray pipe is connected with the connecting flange, and the atomizing spray pipe is arranged in the straight pipeline of the fan; the atomizing nozzle sprays water mist towards the advancing direction of the wind speed.

According to the optimization of the technical scheme, the water and air supply pipeline, the main spray head, the main water and air supply pipeline assembly, the water and air supply control cabinet and an external water source form a water passage; the water supply and air supply pipeline, the auxiliary spray head, the main water and air supply pipeline assembly, the water and air supply control cabinet and an external water source form a water passage; the water and air supply pipeline, the compressed nitrogen sprayer, the main water and air supply pipeline assembly, the water and air supply control cabinet and the external air source form an air passage.

Compared with the prior art, the invention has the beneficial effects that:

in the device, a main spray head and a compressed nitrogen spray head are both arranged at an inlet of a variable-diameter pipeline of a fan, an auxiliary spray head is arranged at the front end of a necking flange at the front end of an inlet of an impeller, and the auxiliary spray head sprays water mist in the advancing direction of wind speed; the water and gas supply control cabinet controls the spraying and cleaning rhythm of the main spray head, the compressed nitrogen spray head and the auxiliary spray head, and the stainless steel impeller with passivated surface rotates at high speed while cleaning.

Drawings

FIG. 1 is a perspective view of the high-speed rotor online ash removal device (the blower is hidden in the figure).

FIG. 2 is a front view of the on-site arrangement of the high-speed rotor online ash removal device of the invention.

Fig. 3 is a top view of fig. 2.

Fig. 4 is an enlarged view at D in fig. 3.

Fig. 5 is a schematic view of an impeller.

Fig. 6 is an enlarged view at a in fig. 5.

Fig. 7 is an enlarged view at B in fig. 5.

Fig. 8 is an enlarged view at C in fig. 5.

Fig. 9 is a view showing the installation position of the blades in the impeller.

Fig. 10 is an enlarged view at E in fig. 9.

FIG. 11 is a first view of the main showerhead.

FIG. 12 is a second view of the main showerhead.

FIG. 13 is a schematic view of the central nozzle and inner orifice in the main head along the spray path of the nozzle and impeller.

FIG. 14 is a schematic view of the spray path of the blade back basin nozzle and the impeller in the main spray head.

Fig. 15 is a perspective view schematically illustrating the assembly of the main water and air supply path according to the present embodiment.

Fig. 16 is a front view of fig. 15.

Fig. 17 is a fluid schematic diagram of the present embodiment.

Detailed Description

The technical solution of the present invention is described in detail below, but the scope of the present invention is not limited to the embodiments.

In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with fig. 1 to 17 and the detailed description.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In this embodiment, a gas blower is taken as an example to further describe the technical scheme.

As shown in fig. 1 and 2, the high-speed rotor online ash removal device comprises an impeller 1, a main spray head 2, an auxiliary spray head 3, a compressed nitrogen spray head 7, a water and air supply pipeline 9, a water and air supply main pipeline assembly 4, a water and air supply control cabinet 5 and a remote control cabinet 6.

As shown in fig. 1 and 2, a main nozzle 2 and a compressed nitrogen nozzle 7 are both arranged at the inlet of a fan reducing pipeline 8, the main nozzle 2 is arranged at a position close to an impeller 1, the central axis of the main nozzle 2 is coincident with the central axis of the impeller 1, and the main nozzle 2 sprays water to the inner side surface 11 of a front disc, the inner side surface 12 of a rear disc, the basin surface 15 of a blade, the back surface 16 of the blade and the inner wall 13 of the inlet of a fan inlet channel of the impeller 1 at the same time; the compressed nitrogen nozzle 7 is arranged at a position close to the impeller 1, and the compressed nitrogen nozzle 7 sprays air to the blade basin surface 15 of the blade and the blade back surface 16 of the blade on the impeller 1.

As shown in fig. 1 and 2, the auxiliary nozzle 3 is mounted on the front end of the throat flange 81 at the front end of the inlet of the impeller 1, and the auxiliary nozzle 3 sprays water mist in the direction in which the wind speed advances.

In this embodiment, the main nozzle 2 and the compressed nitrogen nozzle 7 are both installed at the inlet of the air duct, the water and air supply control cabinet 5 controls the spraying and cleaning rhythm of the main nozzle 2 and the compressed nitrogen nozzle 7, and the impeller 1 rotates at a high speed while cleaning ash.

As shown in fig. 5, 6, 7 and 8, in the embodiment, the impeller 1 in the gas fan comprises a front disk, a rear disk and a plurality of blades, wherein the front disk and the rear disk are parallel, the plurality of blades are uniformly distributed between the front disk and the rear disk, and a fan inlet channel is vertically arranged on the outer side surface of the rear disk in an extending manner; stainless steel plates 14 are welded on the inner side surface 11 of the front disc, the inner side surface 12 of the rear disc, the basin surface 15 of the blade, the back surface 16 of the blade and the inlet inner wall 13 of the inlet channel of the fan, and surface passivation treatment is carried out on the stainless steel plates; the stainless steel is subjected to comprehensive acid pickling passivation treatment, dirt such as various oil stains, rust, oxide skins, welding spots and the like is removed, the surface becomes uniform silvery white after treatment, and the corrosion resistance of the stainless steel is greatly improved.

As shown in fig. 5, 6, 7, 8, 9 and 10, the stainless steel plate has a thickness of 0.5-5mm, and is welded on the front disk inner side surface 11 of the front disk, the rear disk inner side surface 12 of the rear disk, the blade basin surface 15 of the blade, the blade back surface 16 of the blade and the inlet inner wall 13 of the inlet channel of the fan by ultrasonic spot welding, and the stainless steel plate 14 is subjected to surface passivation treatment to play a role in corrosion prevention.

As shown in fig. 6, 7 and 8, the stainless steel plate 14 is welded to the entire inner surface 11 of the front disk and the entire inner surface 12 of the rear disk, and the stainless steel plate 14 is welded to the entire inner wall 13 of the inlet duct of the fan, on the inner wall 13 of the inlet duct of the fan.

As shown in fig. 10, the stainless steel plates 14 welded to the basin surface 15 and the back surface 16 of the blade on the impeller 1 are coated, and the stainless steel plates 14 coat the entire blade and play a good role in corrosion prevention by the stainless steel plates 14.

As shown in fig. 1, the main nozzle 2, the auxiliary nozzle 3 and the compressed nitrogen nozzle 7 are all installed through a main water and air supply path assembly 4, and a water and air supply control cabinet 5 is electrically connected with a remote control cabinet 6 and is operated and controlled by the remote control cabinet 6; the water and gas supply control cabinet 5 is connected with the main water and gas supply path assembly 4 through a cable to control the control components.

The main water and air supply circuit assembly 4 is mainly a pipe, a valve, a bracket, etc., which are known to those skilled in the art. A water way in the main water and air supply path assembly 4 is connected with a water supply pump to supply water to the main spray head 2 and the auxiliary spray head 7; the gas circuit in the main water and gas supply path assembly 4 is connected with an external gas source; in this embodiment, the gas source is preferably compressed nitrogen gas of 0.3 to 1 MPa.

As shown in fig. 1, control elements for supplying water and air are arranged in the water and air supply control cabinet 5, and a PLC, a touch screen and other electrical components are arranged in the remote control cabinet 6. The water and gas supply control cabinet 5 is connected on the spot, the water and gas supply control cabinet 5 is an explosion-proof control cabinet, and the connection is in accordance with the explosion-proof standard.

As shown in fig. 1, the water and air supply pipeline 9 connects the main nozzle 2, the auxiliary nozzle 3, the main water and air supply pipeline assembly 4, the water and air supply control cabinet 5, the compressed nitrogen nozzle 7, the external water source 91 and the external air source 92 together to form a water passage or an air passage, and the water or the air is introduced into the fan reducing pipeline 8 through the connecting flange 82.

As shown in fig. 3, in this embodiment, the attachment flange 82 is installed by field welding.

In this embodiment, the following concrete steps are performed: the water supply and air supply line 9, the main nozzle 2, the main water supply and air supply line assembly 4, the water supply and air supply control cabinet 5 and the external water source 91 form a water passage.

A water supply passage of the main nozzle 2 is connected with an external water supply system, namely a water source; in this embodiment, the water supply system is known in the art and known to those skilled in the art. The main spray head 2 sprays water to the inner side surface 11 of the front disk of the stainless steel impeller 1 with passivated surface, the inner side surface 12 of the rear disk, the blade basin surface 15 of the blade, the blade back surface 16 of the blade and the inlet inner wall 13 of the inlet channel of the fan.

The water supply and air supply pipeline 9, the auxiliary spray head 3, the main water and air supply pipeline assembly 4, the water and air supply control cabinet 5 and the external water source 91 form a water passage.

A water supply passage of the auxiliary nozzle 3, which is connected to an external water supply system, i.e., a water source; in this embodiment, the water supply system is known in the art and known to those skilled in the art. The auxiliary spray head 3 sprays water mist to the advancing direction of the wind speed of the fan.

The water supply and air supply pipeline 9, the compressed nitrogen nozzle 7, the water supply and air supply main pipeline assembly 4, the water supply and air supply control cabinet 5 and the external air source 92 form an air passage.

The air supply passage of the compressed nitrogen nozzle 7 is connected with an external air source; the air source in the embodiment is preferably compressed nitrogen with the pressure of 0.3-1 MPa. The compressed nitrogen gas nozzle 7 sprays compressed nitrogen gas to the blade bowl surface 15 and the blade back surface 16 of the blade of the stainless steel impeller 1 with passivated surface.

As shown in fig. 2 and 3, the inner pipe of the site piping boundary 41 of the main water and gas supply path assembly 4 is fabricated on site according to actual conditions, and has a pipe diameter identical to that of the inlet.

As shown in fig. 15, 16 and 17, in the main water and air supply road assembly 4 of the present embodiment, preferably, the main water and air supply road assembly 4 includes the underframe 4-16 formed by welding angle steel, and the main water and air supply road assembly 4 is provided with the water supply passage and the air supply passage therein.

Two ends of a pipeline in the air supply passage are both provided with a first slipknot joint 4-3, and a first explosion-proof electromagnetic valve 4-1, a first pressure transmitter 4-15, a starting triplet 4-14 and a first ball valve 4-13 are arranged on the air path pipeline.

One end of a pipeline in the water supply passage is provided with a second loose joint 4-4, the other end of the pipeline is provided with a second ball valve 4-7, a first filter 4-12 is arranged at the front end of the second ball valve 4-7 on the waterway pipeline, a vertical pipeline pump 4-10 is arranged on the waterway pipeline, two ends of the vertical pipeline pump 4-10 are connected with an inlet and outlet reducer 4-11, one inlet and outlet reducer 4-11 is connected with the first filter 4-12, and the other inlet and outlet reducer 4-11 is connected with a second filter 4-8; a sealing gasket 4-9 is arranged between the second filter 4-8 and the inlet and outlet reducer pipe 4-11; a third ball valve 4-7 is arranged on the front end waterway pipeline of the second filter 4-8, a second pressure transmitter 4-6 is arranged on the front end waterway pipeline of the third ball valve 4-7, and a second explosion-proof electromagnetic valve 4-5 is arranged on the front end waterway pipeline of the second pressure transmitter 4-6.

In this embodiment, the first filter 4-12 is a filter with 20 meshes, and the second filter 4-8 is a filter with 100 meshes, so as to effectively filter impurities in the water entering the main nozzle 2 and the auxiliary nozzle 3, and avoid affecting the fan impeller.

The installation of the main water and gas supply path assembly 4 is preferably close to a wall, and the specific position can be determined according to the field.

As shown in fig. 17, the working principle of the fluid is as follows: the water source provides 0.3MPa water, is connected into a water channel pipeline, passes through the second loose joint 4-4, passes through the first filter 4-12, enters the vertical pipeline pump 4-10, passes through the second filter 4-8, and is supplied to the main spray head 2 and the auxiliary spray head 3.

And the air source provides 0.6MPa compressed nitrogen, is connected into the air path pipeline, is connected into the starting triplet 4-14 through the first ball valve 4-13 and then is supplied to the nitrogen nozzle 7 through the first pressure transmitter 4-15.

In the embodiment, the second slipknot joint 4-4 is preferably a high platform flange ball valve DN40, the first filter 4-12 is preferably, and the Y-shaped filter 20-mesh DN40 is provided with a flange; the vertical pipeline pump 4-10 is optimized, and the explosion-proof vertical pipeline pump ISG20-160 has a flange with a flow rate of 2.5 and a lift of 32 m; the second filter 4-8 is preferably a Y-type filter with 100 mesh DN40 flange.

As shown in fig. 11 and 12, in the present embodiment, the preferable main nozzle 2 is structured as follows:

the main spray head 2 comprises a central nozzle 21, a main spray pipe 22, at least one opening edge nozzle 23 and at least one blade back blade basin nozzle 24, the main spray pipe 22 is connected with a connecting flange 82, the main spray pipe 22 is arranged in the variable diameter pipeline 8 of the fan, and the connecting flange 82 is arranged on the shell of the variable diameter pipeline 8 of the fan.

In the present embodiment, the number of the inner ports of the main nozzle 2 is preferably two or three along the nozzle 23 and the bucket nozzle 24.

As shown in fig. 11 and 13, the central nozzle 21 is arranged at the most front end of the main nozzle 22, the central nozzle 21 is coaxial with the main nozzle 22, the vertical distance L1 between the jet orifice of the central nozzle 21 and the edge 17 of the impeller 1 is L1 which is more than or equal to 2 mm; the central nozzle 21 is opposite to the central axis of the impeller 1; the central nozzle 21 is a hollow conical scattering nozzle, the scattering angle alpha 3 is 45-90 degrees, and the hollow angle alpha 3 is 10-40 degrees. The parameters in this embodiment are preferably optimal parameters obtained through numerous experiments.

As shown in fig. 13, the center nozzle 21 sprays water toward the center line of the stainless steel impeller 1 whose surface is passivated.

As shown in fig. 12, 13 and 14, all the ports are obliquely mounted on the outer wall of the front section of the main nozzle 22 along the nozzle 23, the ports form an acute angle θ 2 with the central axis of the impeller 1 along the central axis of the nozzle 23, all the ports are uniformly arranged along the nozzle 23, and the ports are aligned with the inlet inner wall 13 of the fan inlet channel of the impeller 1 along the nozzle 23; the nozzle edge 23 is a solid nozzle, and the injection angle alpha 1 is 10-45 degrees.

As shown in fig. 13, all the ports spray water along the nozzles 23 against the inlet inner wall 13 of the fan inlet channel of the impeller 1.

As shown in fig. 11 and 14, all the blade back blade basin nozzles 24 are obliquely installed on the outer wall of the front section of the main nozzle 22, all the blade back blade basin nozzles 24 are uniformly arranged, and all the blade back blade basin nozzles 24 and all the ports are alternately arranged along the nozzle 23; the rim nozzle 23 is located between the center nozzle 21 and the bucket nozzle 24; the central axis of the blade back blade basin nozzle 24 and the central axis of the impeller 1 form an acute angle theta 1, theta 2 is more than theta 1, and the blade back blade basin nozzle 24 is aligned with the blade basin surface 15 and the blade back surface 16 of the upper blade of the impeller 1; the blade back and blade basin nozzle 24 is a solid nozzle, and the spray angle alpha 2 is 5-30 degrees; alpha 1 is more than or equal to alpha 2.

As shown in fig. 14, all the bucket back bucket nozzles 24 spray water in alignment with the bucket face 15 and the bucket back face 16 of the upper blade of the impeller 1.

The main nozzle 2 of the present embodiment is arranged to spray water to the impeller 1 from a plurality of angles, and to clean ash by high-speed rotation of the impeller 1 itself, thereby effectively preventing coal ash from adhering to the impeller.

In the embodiment, the compressed nitrogen nozzle 7 comprises a nitrogen nozzle and a nitrogen spray pipe, the nitrogen nozzle is arranged at the foremost end of the nitrogen spray pipe, the nitrogen spray pipe is connected with the connecting flange 82, the nitrogen spray pipe is arranged inside the fan reducing pipeline 8, and the connecting flange 82 is arranged on the shell of the fan reducing pipeline 8; the nitrogen nozzles are aligned with the basin surface 15 and the back surface 16 of the upper blade of the impeller 1.

As shown in fig. 17, the nitrogen gas nozzle in this embodiment is preferably a water-gas composite nozzle 1.5L + 2L.

In this embodiment, the auxiliary nozzle 3 includes an atomizing nozzle and an atomizing nozzle, the atomizing nozzle is installed at the foremost end of the atomizing nozzle, the atomizing nozzle is connected with the connecting flange 82, and the atomizing nozzle is arranged inside the straight pipeline of the fan; the atomizing nozzle sprays water mist towards the advancing direction of the wind speed.

In this embodiment, arrange PLC, touch-sensitive screen and other electrical components in the remote control cabinet 6.

The remote control cabinet 6 is provided with parameter setting, the highest water pressure range is 0.25-1.0MPa, the lowest water pressure range is 0.1-1.0MPa, the highest air pressure range is 0.25-1.0MPa, and the lowest air pressure range is 0.1-1.0 MPa. The interval period of the air valve is set to be 0-99min, and the continuous working time of the air valve is set to be 0-99 min.

The touch screen in the remote control cabinet 6 has "automatic" and "manual" buttons. After the 'automatic' button is pressed, the control is carried out by a water and gas supply control cabinet 5 connected on site. After the manual button is pressed, the buttons of motor start, motor stop, main valve open, main valve close, auxiliary valve open, auxiliary valve close, air valve open and air valve close are provided, and the buttons respectively correspond to the buttons of motor start, motor stop, main valve open, main valve close, auxiliary valve open, auxiliary valve close, air valve open and air valve close.

The local wiring water and gas supply control cabinet 5 and the remote control cabinet 6 transmit signals through network communication, the water and gas supply control cabinet 5 is controlled by a PLC in the remote control cabinet 6, and the PLC control adopted in the embodiment is known in the technical field and known by persons skilled in the art.

When the locally-wired water and gas supply control cabinet 5 receives signals of 'manual' motor on ',' motor off ',' main valve on ',' main valve off ',' auxiliary valve on ',' auxiliary valve off ',' gas valve on 'and' gas valve off 'of the remote control cabinet 6, the signals respectively correspond to the motor' on ',' motor 'off', 'main valve on', 'main valve off', 'auxiliary valve on', 'auxiliary valve off', 'gas valve on' and 'gas valve off' through PLC control.

When the local wiring water and gas supply control cabinet 5 receives an 'automatic' signal from the remote control cabinet 6, the main valve and the auxiliary valve are opened to enter an open state, and the gas valve is closed and continuously connected (connected for set continuous working time) according to the interval period (disconnected set interval period) and the continuous working time set by the remote operation display cabinet. When the detected lowest water pressure is lower than the lowest water pressure set by the remote operation display cabinet, the motor is automatically started through PLC control, and when the detected highest water pressure is higher than the highest water pressure set by the remote operation display cabinet, the motor is automatically stopped through PLC control.

When the water pressure is lower than 0.1MPa after the motor is started, the water path is considered to be cut off, the main valve and the auxiliary valve are closed, the system gives an alarm to prompt that the water path cannot supply water; when the air pressure is lower than 0.1MPa, the air valve is closed, the system gives an alarm to prompt that the air circuit cannot supply air.

The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.

Claims

1. The utility model provides an online ash removal device of high-speed rotor, includes impeller (1), its characterized in that: also comprises a main spray head (2), an auxiliary spray head (3), a compressed nitrogen spray head (7), a water and air supply pipeline (9), a water and air supply main path assembly (4), a water and air supply control cabinet (5) and a remote control cabinet (6),

the main spray head (2) and the compressed nitrogen spray head (7) are arranged at the inlet of a fan reducing pipeline (8), the main spray head (2) is arranged at a position close to the impeller (1), the central axis of the main spray head (2) is overlapped with the central axis of the impeller (1), and the main spray head (2) sprays water to the inner side surface (11) of a front disc, the inner side surface (12) of a rear disc, the basin surface (15) of the blade, the back surface (16) of the blade and the inner wall (13) of an inlet channel of the fan at the same time; the compressed nitrogen nozzle (7) is arranged at a position close to the impeller (1), and the compressed nitrogen nozzle (7) sprays air to a blade basin surface (15) of a blade on the impeller (1) and a blade back surface (16) of the blade;

the auxiliary nozzle (3) is arranged at the front end of a necking flange (81) at the front end of the inlet of the impeller (1), and the auxiliary nozzle (3) sprays water mist to the advancing direction of the wind speed;

the main spray head (2), the auxiliary spray head (3) and the compressed nitrogen spray head (7) are all installed through a water and gas supply main path assembly (4), and a water and gas supply control cabinet (5) is electrically connected with a remote control cabinet (6) and is operated and controlled by the remote control cabinet (6); the water and gas supply control cabinet (5) is connected with the water and gas supply main road assembly (4) through a cable to control the control components;

control elements for supplying water and air are arranged in the water and air supply control cabinet (5), and a PLC, a touch screen and other electrical components are arranged in the remote control cabinet (6);

the water supply and air supply pipeline (9) connects the main spray head (2), the auxiliary spray head (3), the main water supply and air supply pipeline assembly (4), the water supply and air supply control cabinet (5), the compressed nitrogen spray head (7), the external water source (91) and the external air source (92) together to form a water passage or an air passage, and the water or the air is introduced into the fan reducing pipeline (8) through the connecting flange (82) and is sent into the fan reducing pipeline.

2. The high-speed rotor online ash removal device of claim 1, wherein: the impeller (1) comprises a front disc, a rear disc and a plurality of blades, wherein the front disc is parallel to the rear disc, the plurality of blades are uniformly distributed between the front disc and the rear disc, and a fan inlet channel is vertically arranged on the outer side surface of the rear disc in an extending manner; stainless steel plates (14) are welded on the inner side face (11) of the front disc, the inner side face (12) of the rear disc, the basin face (15) of the blades, the back face (16) of the blades and the inner wall (13) of the inlet of the fan, and surface passivation is carried out on the stainless steel plates.

3. The high-speed rotor online ash removal device of claim 2, wherein: the thickness of the stainless steel plate is 0.5-5 mm.

4. The high-speed rotor online ash removal device of claim 2, wherein: the main spray head (2) comprises a central nozzle (21), a main spray pipe (22), at least one opening edge nozzle (23) and at least one blade back blade basin nozzle (24), the main spray pipe (22) is connected with a connecting flange (82), the main spray pipe (22) is arranged in the variable diameter pipeline (8) of the fan, and the connecting flange (82) is arranged on the shell of the variable diameter pipeline (8) of the fan;

the central nozzle (21) is arranged at the most front end of the main nozzle (22), the central nozzle (21) is coaxial with the main nozzle (22), the vertical distance L1 between the jet orifice of the central nozzle (21) and the edge of the impeller (1) is larger than or equal to 2mm, and L1 is larger than or equal to 2 mm; the central nozzle (21) is opposite to the central axis of the impeller (1); the central nozzle (21) is a hollow conical scattering nozzle, the scattering angle alpha 3 is 45-90 degrees, and the hollow angle alpha 3 is 10-40 degrees;

all the ports are obliquely arranged on the outer wall of the front section of the main spray pipe (22) along the spray nozzle (23), acute angles theta 2 are formed between the central axis of the ports along the spray nozzle (23) and the central axis of the impeller (1), all the ports are uniformly distributed along the spray nozzle (23), and the ports are aligned to the inlet inner wall (13) of the fan inlet channel of the impeller (1) along the spray nozzle (23); the nozzle edge (23) is a solid nozzle, and the injection angle alpha 1 is 10-45 degrees;

all the blade back blade basin nozzles (24) are obliquely arranged on the outer wall of the front section of the main nozzle (22), all the blade back blade basin nozzles (24) are uniformly distributed, and all the blade back blade basin nozzles (24) and all the openings are alternately arranged along the nozzles (23); the opening edge nozzle (23) is positioned between the central nozzle (21) and the blade back blade basin nozzle (24); an acute angle theta 1 is formed between the central axis of the blade back blade basin nozzle (24) and the central axis of the impeller (1), theta 2 is larger than theta 1, and the blade back blade basin nozzle (24) is aligned with a blade basin surface (15) and a blade back surface (16) of an upper blade of the impeller (1); the blade back and blade basin nozzle (24) is a solid nozzle, and the spray angle alpha 2 is 5-30 degrees; alpha 1 is more than or equal to alpha 2.

5. The high-speed rotor online ash removal device of claim 1, wherein: the compressed nitrogen nozzle (7) comprises a nitrogen nozzle and a nitrogen spray pipe, the nitrogen nozzle is arranged at the foremost end of the nitrogen spray pipe, the nitrogen spray pipe is connected with a connecting flange (82), the nitrogen spray pipe is arranged inside the fan reducing pipeline (8), and the connecting flange (82) is arranged on a shell of the fan reducing pipeline (8); the nitrogen nozzle is aligned with the blade basin surface (15) and the blade back surface (16) of the upper blade of the impeller (1).

6. The high-speed rotor online ash removal device of claim 1, wherein: the auxiliary spray nozzle (3) comprises an atomizing spray nozzle and an atomizing spray pipe, the atomizing spray nozzle is arranged at the foremost end of the atomizing spray pipe, the atomizing spray pipe is connected with the connecting flange (82), and the atomizing spray pipe is arranged in a straight pipeline of the fan; the atomizing nozzle sprays water mist towards the advancing direction of the wind speed.

7. The high-speed rotor online ash removal device of claim 1, wherein: a water channel is formed by the water supply and air supply pipeline (9), the main spray head (2), the water supply and air supply main pipeline assembly (4), the water supply and air supply control cabinet (5) and an external water source (91); the water supply and air supply pipeline (9), the auxiliary spray head (3), the main water and air supply pipeline assembly (4), the water and air supply control cabinet (5) and an external water source (91) form a water passage; and the water and air supply pipeline (9), the compressed nitrogen spray head (7), the water and air supply main path assembly (4), the water and air supply control cabinet (5) and the external air source (92) form an air passage.