CN217888270U - Total air door purging system of coal mill - Google Patents
Total air door purging system of coal mill Download PDFInfo
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- CN217888270U CN217888270U CN202221610878.3U CN202221610878U CN217888270U CN 217888270 U CN217888270 U CN 217888270U CN 202221610878 U CN202221610878 U CN 202221610878U CN 217888270 U CN217888270 U CN 217888270U
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- air door
- door
- guide rail
- rail groove
- total air
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Abstract
The utility model relates to a coal mill total air door purging system, including coal mill entry wind channel, total air door case and total air door, total air door case keeps away from coal mill entry wind channel one side and is provided with the subassembly of blowing, the subassembly of blowing includes blows grey house steward, door wall air outlet unit to the door wall ash removal of total air door and guide rail groove air outlet unit to the guide rail groove ash removal, door wall air outlet unit and guide rail groove air outlet unit one end all link to each other with blowing grey house steward through the connecting pipe, and blow and all set up the solenoid valve on grey house steward and the connecting pipe; the guide rail groove air outlet unit is arranged on one side of a guide rail groove on the lower portion of the main air door box and comprises a middle pipe and side pipes symmetrically arranged, and a blocking assembly and a cleaning assembly are further arranged at an outlet of the main air door box. The utility model discloses can realize carrying out the automatic function that sweeps to the track groove of total air door and total air door wall deposition, improve the reliability of coal pulverizer total air door control function to maintenance personal's security has been improved greatly.
Description
Technical Field
The utility model belongs to the technical field of the power plant maintenance, a coal pulverizer total air door setting is related to, especially a coal pulverizer total air door purging system.
Background
The coal mill is important production equipment of a coal-fired power plant unit, and plays an important role in normal production and operation of a boiler. The situation that the limit opening is not full or the limit opening is not tight always occurs when the primary main air door of the coal mill is opened and closed; above-mentioned condition is generally because the north is dry, lead to in the air dust, cinder and flocculus content higher, in the unit operation process, can appear on the guide rail groove of total air door and total air door, total air door incasement deposition, it is serious to accumulate the flocculus, influence the normal opening and closing of total air door, the security and the reliability of equipment have seriously been influenced to these problems, there is huge operation potential safety hazards such as falling load and jumping the stove even, it is specific when the coal pulverizer overhauls, if total air door is closed not tight, can lead to the high temperature once wind through the heating to get into the coal pulverizer, threaten maintainer's life safety. Therefore, the total air door purging system of the coal mill is urgently needed, aiming at the situation that the total air door of the coal mill is not fully opened or closed tightly in a limiting way, the influence of the environment on a feedback device is reduced, and the problems of high defect rate of related equipment, high maintenance cost, potential safety hazards and the like are fundamentally solved.
No patent documents relevant to the present application were found by search.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, a total air door purging system of coal pulverizer is provided, this system is provided with the subassembly of blowing in door case one side, when closing total air door, sweep in step with compressed air simultaneously, can effectively reduce the deposition on the total air door guide rail, thereby guarantee that the total air door of coal pulverizer closes and targets in place, combine simultaneously to block the subassembly and clean the subassembly, prevent that the dust from getting into total air door incasement and gluing the deposition on total air door and getting into the door incasement from the crack, the efficiency of sweeping has been improved greatly.
The utility model provides a its technical problem take following technical scheme to realize:
a purging system for a total air door of a coal mill comprises a coal mill inlet air duct, a total air door box and a total air door, wherein the total air door box is installed on one side of the coal mill inlet air duct, a guide rail groove is formed in the bottom of the total air door box, one end of the guide rail groove extends into the coal mill inlet air duct, the total air door and the guide rail groove are installed in a sliding mode, gaps are formed between two side walls of the total air door and the guide rail groove, a pin plate is fixedly installed at one end, close to the coal mill inlet air duct, of the total air door, an air cylinder is installed on the outer side of the total air door box, the output end of the air cylinder is fixedly connected with the pin plate of the total air door, and the air cylinder drives the total air door to open and close at the coal mill inlet air duct;
one end of each door wall air outlet unit and one end of each guide rail groove air outlet unit are connected with the corresponding soot blowing main pipe through connecting pipes, and the soot blowing main pipes and the connecting pipes are provided with electromagnetic valves; the guide rail groove air outlet unit is arranged on one side of a guide rail groove in the lower part of the main air door box and comprises an intermediate pipe and symmetrically arranged side pipes, the intermediate pipe is a telescopic pipe, the telescopic pipe extends into the guide rail groove and horizontally penetrates through the main air door positioned at the position of the guide rail groove, a pipe orifice of the telescopic pipe penetrates through the main air door to purge the guide rail groove positioned at an inlet air duct of the coal mill, the side pipes are symmetrically arranged on two sides of the intermediate pipe, a pipe orifice of each side pipe is positioned on the groove wall of the guide rail groove in the main air door box, the air outlet direction of each side pipe is aligned to the guide rail groove in the main air door box, and the guide rail groove in the main air door box is purged; the door wall air outlet unit is formed by arranging a plurality of air outlet double pipes along the side wall of the door box of the main air door at intervals, and two pipe orifices of each air outlet double pipe are aligned with the gap between the front door wall and the rear door wall of the main air door and the gap between the front door wall and the rear door wall of the door box of the main air door and used for purging the front door wall and the rear door wall of the main air door.
And, still including stopping the subassembly, it sets up in the exit of total air door case to stop the subassembly, it includes the baffle that two symmetries set up to stop the subassembly, every the baffle all installs in total air door case through stopping the cylinder, stops that the cylinder drives the baffle and removes in opposite directions and realize the butt joint and block the effect.
And, still including cleaning the subassembly, clean the exit that the subassembly set up at total air door case, clean the brush that the subassembly includes two symmetries settings, every the brush all is installed at total air door incasement through the roof pressure cylinder, and the roof pressure cylinder drives the brush and removes in opposite directions, realizes that the burr point of brush takes place to deform when contacting total air door surface and reaches and glue the ash and clean the purpose, and the door wall unit of giving vent to anger of the subassembly of blowing cooperates blows, blows the deposition to the wind channel in the exit of total air door case and discharges promptly.
The utility model discloses an advantage is with positive effect:
the utility model discloses be provided with the subassembly of blowing on one side of total air door case, effectively sweep the deposition in the track groove, and combine simultaneously and block subassembly and clean the subassembly, further prevent that the deposition from getting into total air door case, further improved the efficiency of deashing;
the utility model discloses can realize carrying out the automatic function of sweeping to the track groove of total air door and total air door wall deposition, improve the reliability of coal pulverizer total air door control function, after having improved the reliability of coal pulverizer total air door, can reduce the manual deashing of maintainer and the time of handling the defect; the reliable isolation of a coal mill system can be ensured when the coal mill is stopped for maintenance, the risk that hot primary air enters the coal mill is eliminated, and the personal safety of maintenance personnel in the coal mill is ensured;
the utility model discloses having improved the coal pulverizer total air door and closing the reliability of opening after, can guaranteeing to stop hot primary air and get into the coal pulverizer when the coal pulverizer stops the fortune, arouse the buggy that the coal pulverizer inside was gathered and arouse the conflagration that the spontaneous combustion was made because of the high temperature flue gas, can the total amount of wind of effective control boiler simultaneously, reduce primary air fan power consumption, improve boiler efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the door closing state of the present invention;
FIG. 3 is a schematic view of the door opening state of the present invention;
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.
A total air door purging system of a coal mill comprises a coal mill inlet air duct 1, a total air door box 5 and a total air door 10, wherein the total air door box is installed on one side of the coal mill inlet air duct, a guide rail groove 12 is formed in the bottom of the total air door box, one end of the guide rail groove extends into the coal mill inlet air duct, the total air door and the guide rail groove are installed in a sliding mode, gaps are formed between the two side walls of the total air door and the guide rail groove, a bolt plate 11 is fixedly installed at one end, close to the coal mill inlet air duct, of the total air door, an air cylinder 4 is installed on the outer side of the total air door box, the output end of the air cylinder is fixedly connected with the bolt plate of the total air door, and the air cylinder drives the total air door to be opened and closed at the coal mill inlet air duct;
one side, far away from an inlet air duct of the coal mill, of the main air door box is provided with a blowing assembly, the blowing assembly comprises a soot blowing main pipe 8 connected with a compressed air conveying system, the soot blowing main pipe is used for conveying compressed air, the blowing assembly further comprises a door wall air outlet unit 7 and a guide rail groove air outlet unit 6, one ends of the door wall air outlet unit and the guide rail groove air outlet unit are connected with the soot blowing main pipe through connecting pipes, a first electromagnetic valve 9 is arranged on the soot blowing main pipe, and a second electromagnetic valve 6-2 and a third electromagnetic valve 7-1 are respectively arranged on the connecting pipes; the guide rail groove air outlet unit is arranged on one side of a guide rail groove at the lower part of the main air door box and comprises an intermediate pipe 6-1 and symmetrically arranged side pipes, wherein the intermediate pipe is a telescopic pipe which extends into the guide rail groove and horizontally penetrates through the main air door at the position of the guide rail groove, the pipe orifice of the telescopic pipe penetrates through the main air door to purge the guide rail groove at the inlet air duct of the coal mill, the side pipes are symmetrically arranged on two sides of the intermediate pipe, the pipe orifices of the side pipes are positioned on the groove wall of the guide rail groove in the main air door box, the air outlet direction of the side pipes is aligned with the guide rail groove in the main air door box, and the guide rail groove in the main air door box is mainly purged; the door wall air outlet unit is formed by longitudinally and uniformly arranging a plurality of air outlet double pipes at intervals along the side wall of the main air door box, and two pipe orifices of each air outlet double pipe are aligned to the gap between the front door wall and the rear door wall of the main air door and the door box and used for purging the front door wall and the rear door wall of the main air door;
in the specific implementation of the utility model, because there is a gap between the main air door box and the main air door, in order to prevent coal cinder and dust from entering the main air door box from the gap, a blocking component 2 is arranged at the outlet of the main air door box, the blocking component comprises two symmetrically arranged baffles 2-1, each baffle is arranged in the main air door box through a blocking cylinder, when the main air door enters the inlet air channel of the coal mill to realize the door closing, the symmetrically arranged baffles move in opposite directions under the driving of the blocking cylinder to realize the butt joint blocking effect;
further, in order to prevent the deposition on the door wall of the main air door from entering the main air door box and better purge the deposition on the main air door, the outlet of the main air door box on one side of the blocking assembly is further provided with a cleaning assembly 3, the cleaning assembly comprises two brushes 3-1 which are symmetrically arranged and each of which is arranged in the main air door box through a jacking air cylinder, the brushes are symmetrically arranged and driven by the jacking air cylinders to move towards each other and to be close to each other before the main air door is opened, the distance between the tips of the brushes is smaller than the thickness of the main air door, the main air door moves towards the main air door box, the tips of the brushes deform when contacting the surface of the main air door, so that the dust on the door wall of the main air door is cleaned by the tips of the brushes, the deposition on the door wall is cleaned by the tips of the brushes and adhered to the brushes, and the wall air outlet unit of the air blowing assembly is matched with the deposition on the brush, so that the deposition on the air outlet of the air door wall unit can be blown out from the outlet of the main air door box more quickly under the effect of the air door wall unit.
When the utility model is operated in detail,
when an air duct at the inlet of the coal mill needs to be closed, the cylinder is started, the first electromagnetic valve and the second electromagnetic valve are opened simultaneously, when the main air door moves, the middle pipe of the guide rail groove air outlet unit blows dust to the guide rail groove in the air duct at the inlet of the coal mill, the side pipe blows dust to the guide rail groove in the door box of the main air door, the deposited dust of the middle pipe and the guide rail groove is blown up and discharged along with the air duct, when the air duct is closed, the first electromagnetic valve and the second electromagnetic valve are closed, the blocking cylinder of the blocking assembly is started, the symmetrically arranged baffles move in opposite directions under the driving of the blocking cylinder to realize butt blocking, the problem of rail blocking when the door is closed is solved, and meanwhile, the problem that dust enters the door box is also solved; when the air duct needs to be opened, the jacking cylinder is started, the symmetrically arranged brushes are driven by the jacking cylinder to move towards each other and approach to each other, and a distance still exists between the jacking cylinder and the tracks, the distance between the brush tips is smaller than the thickness of the total air door, when the total air door moves towards the total air door box, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are opened, the guide rail groove air outlet unit sweeps the guide rail groove, and due to the fact that the brush tips of the brushes deform when contacting the surface of the total air door, surface brushing is achieved, dust on the door wall of the total air door is swept by the brush tips of the brushes, the dust on the door wall is swept by the brush tips of the brushes and adheres to the brushes, and meanwhile, the door wall air outlet unit of the blowing assembly is matched, so that the dust on the brushes can be blown to the air duct from the outlet of the total air door box more quickly under the action of the door wall air outlet unit, and the dust on the door wall is prevented from falling into the track groove; the cleaning of the door wall of the main air door is realized while the purging of the track groove is realized, the purging is synchronously performed when the main air door is opened and closed, the accumulated dust on the track groove and the door wall is automatically cleaned, and the opening and closing effect of the main air door is ensured.
The utility model discloses can realize carrying out the automatic function of sweeping to the track groove of total air door and total air door wall deposition, improve the reliability of coal pulverizer total air door control function, after having improved the reliability of coal pulverizer total air door, can reduce the manual deashing of maintainer and the time of handling the defect; the reliable isolation of a coal mill system can be ensured when the coal mill is stopped for maintenance, the risk that hot primary air enters the coal mill is eliminated, and the personal safety of maintenance personnel in the coal mill is ensured;
the utility model discloses having improved the coal pulverizer total air door and closing the reliability of opening after, can guaranteeing to stop hot primary air and get into the coal pulverizer when the coal pulverizer stops the fortune, arouse the buggy that the coal pulverizer inside was gathered and arouse the conflagration that the spontaneous combustion was made because of the high temperature flue gas, can the total amount of wind of effective control boiler simultaneously, reduce primary air fan power consumption, improve boiler efficiency.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (3)
1. A purging system for a total air door of a coal mill comprises a coal mill inlet air duct, a total air door box and a total air door, wherein the total air door box is installed on one side of the coal mill inlet air duct, a guide rail groove is formed in the bottom of the total air door box, one end of the guide rail groove extends into the coal mill inlet air duct, the total air door and the guide rail groove are installed in a sliding mode, gaps are formed between two side walls of the total air door and the guide rail groove, a pin plate is fixedly installed at one end, close to the coal mill inlet air duct, of the total air door, an air cylinder is installed on the outer side of the total air door box, the output end of the air cylinder is fixedly connected with the pin plate of the total air door, and the air cylinder drives the total air door to open and close at the coal mill inlet air duct;
the method is characterized in that: one end of each door wall air outlet unit and one end of each guide rail groove air outlet unit are connected with the corresponding soot blowing main pipe through connecting pipes, and the soot blowing main pipes and the connecting pipes are provided with electromagnetic valves; the guide rail groove air outlet unit is arranged on one side of a guide rail groove at the lower part of the main air door box and comprises a middle pipe and symmetrically arranged side pipes, the middle pipe is a telescopic pipe, the telescopic pipe extends into the guide rail groove and horizontally penetrates through the main air door positioned at the position of the guide rail groove, the pipe orifice of the telescopic pipe penetrates through the main air door to purge the guide rail groove at the inlet air duct of the coal mill, the side pipes are symmetrically arranged on two sides of the middle pipe, the pipe orifices of the side pipes are positioned on the groove wall of the guide rail groove in the main air door box, the air outlet direction of the side pipes is aligned to the guide rail groove in the main air door box, and the guide rail groove in the main air door box is purged; the door wall air outlet unit is formed by arranging a plurality of air outlet double pipes along the side wall of the door box of the main air door at intervals, and two pipe orifices of each air outlet double pipe are aligned with the gap between the front door wall and the rear door wall of the main air door and the gap between the front door wall and the rear door wall of the door box of the main air door and used for purging the front door wall and the rear door wall of the main air door.
2. The coal pulverizer total damper purge system of claim 1, wherein: still including blockking the subassembly, it sets up the exit at total air door case to block the subassembly, it includes the baffle that two symmetries set up, every to block the subassembly the baffle all installs in total air door case through blockking the cylinder, blocks that the cylinder drives the baffle and removes in opposite directions and realize the butt joint and block the effect.
3. The coal pulverizer total damper purge system of claim 1, wherein: still including cleaning the subassembly, clean the exit that the subassembly set up at total air door case, clean the brush that the subassembly includes two symmetries and set up, every the brush is all installed at total air door incasement through the roof pressure cylinder, and the roof pressure cylinder drives the brush and removes in opposite directions, and the hair tip that realizes the brush takes place to deform when contacting total air door surface and reaches to glue the ash and clean the purpose, and the cooperation subassembly of blowing is given vent to anger the door wall unit, blows the deposition to the wind channel in the exit of total air door case promptly and discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221610878.3U CN217888270U (en) | 2022-06-27 | 2022-06-27 | Total air door purging system of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221610878.3U CN217888270U (en) | 2022-06-27 | 2022-06-27 | Total air door purging system of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217888270U true CN217888270U (en) | 2022-11-25 |
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ID=84132461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221610878.3U Active CN217888270U (en) | 2022-06-27 | 2022-06-27 | Total air door purging system of coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217888270U (en) |
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2022
- 2022-06-27 CN CN202221610878.3U patent/CN217888270U/en active Active
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