CN211146541U - Air-powder adjusting system for boiler pulverizing system - Google Patents
Air-powder adjusting system for boiler pulverizing system Download PDFInfo
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- CN211146541U CN211146541U CN201921728299.7U CN201921728299U CN211146541U CN 211146541 U CN211146541 U CN 211146541U CN 201921728299 U CN201921728299 U CN 201921728299U CN 211146541 U CN211146541 U CN 211146541U
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Abstract
The utility model provides a wind powder governing system for boiler powder process system. A wind powder governing system for boiler powder process system, including the drain pan, the equal fixedly connected with nozzle pipe in front end and the rear end of drain pan, the top fixedly connected with top shell of drain pan, the axis of rotation has been run through to the both sides of top shell inner wall, the bottom fixedly connected with baffle of axis of rotation. The utility model provides a wind powder governing system for boiler powder process system has zero resistance: the device is used for continuously changing the differential pressure at the outlet of the coal mill to balance the flow resistance of each pipeline, can keep the pulverized coal flow rate at the outlet of each combustor balanced under the condition of a thermal state, has the characteristics of long-term reliable operation, good linearity of adjustment performance, no jamming, no powder accumulation, no additional increase of pipeline resistance, high wear resistance, flexible configuration of an electric actuator and the like, and therefore the existing problems and difficulties of adjusting the air-pulverized coal flow rate are thoroughly solved, and when the adjustment is not needed, the adjusting baffle is retracted.
Description
Technical Field
The utility model relates to an governing system field especially relates to a wind powder governing system for boiler powder process system.
Background
The control of boiler combustion includes the control of main steam pressure and optimum combustion condition, regulate the powder feeding amount of the powder feeder according to the change of the main steam pressure usually, because the combustion condition of the boiler is related to air-coal ratio, when the coal feeding amount changes, should change the air supply amount of the blower correspondingly, make the surplus air coefficient in the burner hearth keep at the optimum value again while the boiler burns, and the heat loss of exhaust fume is minimum, the relation between coal feeding amount and powder feeder coal feeding amount of the blower, can measure different coal feeding amount and air supply amount according to experience, store the relation of the two in the boiler control computer; in addition, the optimal air-coal ratio and the most suitable combustion area can be automatically searched according to a certain optimization algorithm and an optimization target, so that incomplete combustion loss and smoke discharge loss are minimized.
For a long time, the on-line adjustment of primary air powder of a thermal power generating unit is very limited in application in a power plant, so that the adjustment of the air powder is very extensive, the combustion optimization and adjustment effects of a boiler are greatly restricted, the output of each burner is balanced, and the speed, concentration and flow of the coal powder at the nozzle of the burner are reasonably configured, so that the safety and economic operation of the boiler are of great significance, but the effect is difficult to realize due to the fact that accurate and reliable monitoring and adjusting means are not available, the difference of the flow resistance of each primary air powder conveying pipeline is the main reason of causing the air powder deviation at the outlet of each burner, the flow resistance depends on the inherent characteristics of each pipeline and the coal powder concentration of an air-powder mixture, and other factors, at present, the power plant mostly adopts a cold air leveling mode of an aerodynamic field test, and the leveling mode cannot reflect the flow characteristics; most of primary air powder leveling work stays on static adjustment, offline adjustment is carried out through adjustable shrinkage cavities on pulverized coal pipes, powder is easily accumulated in traditional adjustable shrinkage cavities, spontaneous combustion and even explosion are likely to be caused, the problems that a unit is easy to jam in a hot state and difficult to adjust, adjustment linearity is not good even if adjustment is possible are solved, and the safe, stable and economic operation of a boiler is obviously influenced by the unbalanced distribution phenomenon of the air powder of the boiler.
Therefore, it is necessary to provide a wind powder adjusting system for a boiler pulverizing system to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wind powder governing system for boiler powder process system has solved the wind buggy velocity of flow that can adjust on line to improve the problem of the buggy distribution inequality problem between each buggy pipeline to a certain extent.
In order to solve the technical problem, the utility model provides a wind powder governing system for boiler powder process system, which comprises a bottom shell, the front end of drain pan and the equal fixedly connected with nozzle pipe in rear end, the top fixedly connected with top shell of drain pan, the both sides of top shell inner wall are run through there is the axis of rotation, the bottom fixedly connected with baffle of axis of rotation.
Preferably, a hand wheel is fixedly connected to the left side of the rotating shaft.
Preferably, the case is placed to the left side fixedly connected with motor of top shell, the left side of top shell just is located the rear side fixedly connected with gear box that the case was placed to the motor, the motor is placed and is run through between the case and the relative one side of gear box and be connected the axle and place the case.
Preferably, the inner wall that the case was placed to the motor is provided with the motor, the output shaft fixedly connected with connecting axle of motor, the left end of connecting axle runs through the motor in proper order and places the case, the coupling is placed case and gear box and is extended to the inside of gear box, the first conical gear of left side fixedly connected with of connecting axle.
Preferably, the rear on the right side of the gear box is rotatably connected with a first gear, the back of the first gear is fixedly connected with a speed limiter, the right side of the gear box is rotatably connected with a second gear in the front of the first gear, the right side of the gear box is rotatably connected with a second bevel gear in the front of the second gear, the first gear is meshed with the second gear, the second gear is meshed with the second bevel gear, the right side of the gear box is fixedly connected with a speed reduction plate in the rear of the first gear, and the front of the speed reduction plate is fixedly connected with a control switch.
Preferably, the speed limiter comprises a speed limiting shell, the left side of the speed limiting shell is fixedly connected with the right side of the first gear, the bottom of the inner wall of the speed limiting shell is fixedly connected with a spring, the top of the spring is fixedly connected with a speed limiting rod, and the top of the speed limiting rod is fixedly connected with a speed limiting plate.
Compared with the prior art, the utility model provides a wind powder governing system for boiler powder process system has following beneficial effect:
the utility model provides a wind powder governing system for boiler powder process system, zero resistance: the device is used for continuously changing the differential pressure at the outlet of the coal mill to balance the flow resistance of each pipeline, can keep the pulverized coal flow rate at the outlet of each combustor balanced under the condition of thermal state, has the characteristics of long-term reliable operation, good adjustment performance linearity, no jam, no powder accumulation, no additional increase of pipeline resistance, high wear resistance, flexible arrangement of an electric actuator and the like, thereby thoroughly solving the existing problems and difficulties of adjusting the pulverized coal flow rate, when the adjustment is not needed, the adjusting baffle is retracted, the flow area inside the adjusting device is equal to the flow area of a pulverized coal pipe at the moment, the inside of the adjusting device is in a hollow state and has no resistance, thereby avoiding the additional increase of the resistance of a primary air pipeline, according to the fluid dynamics characteristics, through numerical simulation calculation under a large number of different working conditions, the adjusting baffle can be designed into a machine wing type, and under the same actual adjusting opening, compared with the common baffle, the baffle reduces the resistance by more than ten percent, thereby reducing the resistance of the whole pulverizing system and saving the power consumption of a primary fan; the regulation characteristic is good: the CFD technology is used for simulation calculation under various working conditions, the shell and baffle structure of the wind powder adjusting device is optimized, the adjusting linearity of the adjusting device is good, and the adjusting device can be flexibly adjusted under cold and hot working conditions without jamming; the service life is long: the contact part of the inner part of the air powder and the air flow has all-round dead angle-free protection of super wear-resistant ceramics, wear-resistant ceramic plates with different structural types and different construction processes are respectively designed aiming at the structural characteristics of the inner part of the air powder adjusting device and a baffle, the inner wall of the air powder adjusting device mainly adopts a high-temperature adhesive bonding and spot welding construction process, the baffle mainly adopts a high-temperature adhesive bonding and dovetail groove construction process, wear-resistant ceramic plates with different structures and construction processes are designed and customized according to different wear parts and social security structural characteristics, adjacent sets of ceramic plates are not only pressed and inserted mutually, but also each ceramic plate forms a trapezoidal angle, so that the ceramic plates are tightly connected and have no gap, when the last ceramic plate of a circle is tightly embedded, mechanical self-locking force of three hundred and sixty degrees is formed between the ceramic plates, and proper materials and structural technologies are selected, the ceramic is super wear-resistant, can resist vibration and impact for a long time without falling off, ensures that the ceramic is slightly worn and does not fall off within five years of use of the product, and has the service life of more than ten years; the safety is high: in order to ensure the safety of a powder preparation system and avoid the accidental shutdown of a coal powder pipeline in the normal operation of a unit, the air powder adjusting device is designed to keep forty percent of flow capacity when the air powder adjusting device is completely shut, namely, the baffle cannot be completely closed under any working condition, the minimum flow capacity can be customized according to the condition of the unit and the requirement of a user, when the air powder flow rate of the pipeline does not need to be adjusted, the baffle is completely opened and is tightly attached to the inner wall of a shell of the adjusting device, the baffle is parallel to the flow direction of air flow at the moment and has no resistance, the air powder adjusting device cannot generate powder accumulation in the air powder adjusting device in the long-term use process, and the wear-resistant ceramic pieces cannot cause the shedding phenomenon due to pipeline vibration and cold and.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of an air-powder adjusting system for a boiler pulverizing system according to the present invention;
FIG. 2 is a schematic front view of the spout tube shown in FIG. 1;
FIG. 3 is a top view of the top housing shown in FIG. 1;
FIG. 4 is a schematic structural view of the baffle of FIG. 1;
FIG. 5 is a schematic structural view of a second baffle plate shown in FIG. 1;
FIG. 6 is a side view of the top housing shown in FIG. 1;
fig. 7 is a schematic diagram of the governor of fig. 6.
Reference numbers in the figures: 1. bottom shell, 2, nozzle pipe, 3, top shell, 4, rotating shaft, 5, baffle, 6, hand wheel, 7, motor placing box, 8, gear box, 9, coupling placing box, 10, motor, 11, connecting shaft, 12, first bevel gear, 13, first gear, 14, speed limiter, 15, second bevel gear, 16, speed reducing plate, 17, control switch, 18, second gear, 141, speed limiting shell, 142, spring, 143, speed limiting rod, 144 and speed limiting plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments.
First embodiment
Please refer to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5 in combination, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a pulverized coal conditioning system for a boiler pulverizing system according to the present invention; FIG. 2 is a schematic front view of the spout tube shown in FIG. 1; FIG. 3 is a top view of the top housing shown in FIG. 1; FIG. 4 is a schematic structural view of the baffle of FIG. 1; fig. 5 is a schematic structural view of a second baffle plate shown in fig. 1. The utility model discloses an air powder governing system that is used for boiler powder process system in first embodiment is used for boiler powder process system's air powder governing system, including drain pan 1, the equal fixedly connected with nozzle pipe 2 in front end and the rear end of drain pan 1, the top fixedly connected with top shell 3 of drain pan 1, the both sides of top shell 3 inner wall are run through there is axis of rotation 4, the bottom fixedly connected with baffle 5 of axis of rotation 4, the device inner wall is wear-resisting pottery mainly adopt high temperature glue to paste with spot welding construction technology on the device inner wall, baffle 5 mainly adopt high temperature glue with dovetail construction technology, baffle 5 can be square, airfoil type.
And a hand wheel 6 is fixedly connected to the left side of the rotating shaft 4.
The utility model provides a theory of operation that is used for wind powder governing system of boiler powder process system as follows:
firstly when the wind pressure of air outlet needs to be changed, the hand wheel 6 is rotated, and because the hand wheel 6 is fixedly connected with the rotating shaft 4, the rotating shaft 4 can drive the baffle 5 to rotate together when the hand wheel 6 rotates, and the baffle 5 can reduce the size of the internal channel of the device when the baffle 5 rotates.
Compared with the prior art, the utility model provides a wind powder governing system for boiler powder process system has following beneficial effect:
zero resistance: the device is used for continuously changing the differential pressure at the outlet of the coal mill to balance the flow resistance of each pipeline, can keep the pulverized coal flow rate at the outlet of each combustor balanced under the condition of thermal state, has the characteristics of long-term reliable operation, good adjustment performance linearity, no jam, no powder accumulation, no additional increase of pipeline resistance, high wear resistance, flexible arrangement of an electric actuator and the like, thereby thoroughly solving the existing problems and difficulties of adjusting the pulverized coal flow rate, when the adjustment is not needed, the adjusting baffle 5 is retracted, the flow area inside the adjusting device is equal to the flow area of a pulverized coal pipe at the moment, the inside of the adjusting device is in a hollow state and has no resistance, thereby avoiding the additional increase of the resistance of a primary air pipeline, according to the fluid dynamics characteristics, through numerical simulation calculation under a large number of different working conditions, the adjusting baffle 5 can be designed into a wing type, and under the same actual adjusting opening, compared with the common baffle 5, the resistance is reduced by more than ten percent, so that the resistance of the whole pulverizing system can be reduced, and the power consumption of a primary fan is saved; the regulation characteristic is good: the CFD technology is used for simulation calculation under various working conditions, the structures of the shell of the air powder adjusting device and the baffle 5 are optimized, the adjusting linearity of the adjusting device is good, and the adjusting device can be adjusted flexibly and is not jammed under cold and hot working conditions; the service life is long: the contact part of the inner part of the air and the air flow of the wind power has all-round dead angle-free protection of super wear-resistant ceramics, wear-resistant ceramic plates with different structural types and different construction processes are respectively designed aiming at the structural characteristics of the inner part of the wind power adjusting device and the baffle 5, the inner wall of the wind power adjusting device mainly adopts a high-temperature adhesive bonding and spot welding construction process, the baffle 5 mainly adopts a high-temperature adhesive bonding and dovetail groove construction process, the wear-resistant ceramic plates with different structures and the construction process are ensured to be designed and customized according to different wear parts and social protection structural characteristics, adjacent sets of ceramic plates are not only pressed and inserted mutually, but also each ceramic plate forms a trapezoidal angle, so that the ceramic plates are tightly connected and have no gap, when the last ceramic plate of a circle is tightly embedded, the ceramic plates form three hundred and sixty degrees of mechanical self-locking force, and a proper material, the ceramic is super wear-resistant, can resist vibration and impact for a long time without falling off, ensures that the ceramic is slightly worn and does not fall off within five years of use of the product, and has the service life of more than ten years; the safety is high: in order to ensure the safety of a powder preparation system and avoid the accidental shutdown of a coal powder pipeline in the normal operation of a unit, the air powder adjusting device is designed to still keep forty percent of flow capacity when the air powder adjusting device is completely shut, namely the baffle 5 cannot be completely shut under any working condition, the minimum flow capacity can be customized according to the condition of the unit and the requirement of a user, when the air powder flow rate of the pipeline does not need to be adjusted, the baffle 5 is completely opened and is tightly attached to the inner wall of a shell of the adjusting device, the baffle 5 is parallel to the flow direction of air flow at the moment, no resistance exists, the air powder adjusting device cannot generate powder accumulation in the air powder adjusting device in the long-term use process, and the abrasion-resistant ceramic wafer cannot cause the shedding phenomenon due to pipeline vibration and cold and.
Second embodiment
Please refer to fig. 6 and 7 in combination, wherein fig. 6 is a side view of the top case shown in fig. 1; fig. 7 is a schematic diagram of the governor of fig. 6. The utility model discloses an in the first embodiment, an air powder governing system for boiler powder process system is used for its difference of air powder governing system of boiler powder process system to lie in, case 7 is placed to the left side fixedly connected with motor of top shell 3, the left side of top shell 3 just is located the rear side fixedly connected with gear box 8 that case 7 was placed to the motor, the motor is placed and is run through between one side that case 7 and gear box 8 are relative to place case 9 with the shaft that links.
The inner wall that case 7 was placed to the motor is provided with motor 10, motor 10 is three-phase asynchronous machine and external power supply, the output shaft fixedly connected with connecting axle 11 of motor 10, the left end of connecting axle 11 runs through the motor in proper order and places case 7, the coupling and place case 9 and gear box 8 and extend to the inside of gear box 8, the first conical gear 12 of left side fixedly connected with of connecting axle 11, this device is provided with the start-up of controller control motor 10.
The rear on the right side of the gear box 8 is rotatably connected with a first gear 13, the back of the first gear 13 is fixedly connected with a speed limiter 14, the front on the right side of the gear box 8 and on the first gear 13 is rotatably connected with a second gear 18, the front on the right side of the gear box 8 and on the second gear 18 is rotatably connected with a second bevel gear 15, the first gear 13 is meshed with the second gear 18, the second gear 18 is meshed with the second bevel gear 15, the rear on the right side of the gear box 8 and on the first gear 13 is fixedly connected with a speed reduction plate 16, the front of the speed reduction plate 16 is fixedly connected with a control switch 17, and the first bevel gear 12 is meshed with the second bevel gear 15.
The speed limiter 14 comprises a speed limiting shell 141, the left side of the speed limiting shell 141 is fixedly connected with the right side of the first gear 13, the bottom of the inner wall of the speed limiting shell 141 is fixedly connected with a spring 142, the top of the spring 142 is fixedly connected with a speed limiting rod 143, the top of the speed limiting rod 143 is fixedly connected with a speed limiting plate 144, when the size of an internal channel of the device needs to be changed, the motor 10 is started first, the motor 10 drives the first bevel gear 12 to rotate through the connecting shaft 11, at this time, because the first bevel gear 12 is meshed with the second bevel gear 15, the second bevel gear 15 will rotate along with the rotation of the first bevel gear 12, when the second bevel gear 15 rotates, the first gear 13 will also rotate through driving the second gear 18, and when the first gear 13 rotates, the rotating shaft 4 fixedly connected with the first gear 13 will also rotate, therefore, the baffle 5 rotates along with the rotating shaft 4, the size of the inner wall channel of the device can be controlled by rotating the baffle 5, when the first gear 13 rotates, the speed limiter 14 also rotates along with the rotation of the first gear 13, when the speed limiter 14 rotates to a certain angle, the speed limiting plate 144 on the speed limiter 14 contacts the speed reducing plate 16, at this time, along with the continuous rotation of the first gear 13, the speed limiting plate 144 drives the speed limiting rod 143 to shrink towards the inside of the speed limiting shell 141, when the first gear 13 rotates to a certain angle, the speed limiting plate 144 contacts the control switch 17, at this time, the control switch 17 controls the motor 10 to stop working, the spring 142 is arranged inside the speed limiter 14, so that the matching use of the spring 142 with the speed limiting rod 143, the speed limiting plate 144 and the speed reducing plate 16 can ensure that the baffle 5 cannot drive the first gear 13 to rotate when the motor 10 stops working, the design of the control switch 17 can ensure that the baffle 5 cannot collide with the inner wall of the device due to the excessive number of rotating turns of the motor 10, and the design of the gear inside the gear box 8 can reduce the speed of driving the first gear 13 by the motor 10 through the difference of the sizes of the gears, so that the rotating angle of the baffle 5 can be better controlled.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a wind powder governing system for boiler powder process system, includes drain pan (1), its characterized in that: the equal fixedly connected with spout pipe (2) in front end and the rear end of drain pan (1), the top fixedly connected with top shell (3) of drain pan (1), the both sides of top shell (3) inner wall are run through there are axis of rotation (4), the bottom fixedly connected with baffle (5) of axis of rotation (4).
2. The air-powder adjusting system for a boiler pulverizing system according to claim 1, characterized in that a hand wheel (6) is fixedly connected to the left side of the rotating shaft (4).
3. The air-powder adjusting system for the boiler pulverizing system according to claim 1, characterized in that a motor placing box (7) is fixedly connected to the left side of the top shell (3), a gear box (8) is fixedly connected to the left side of the top shell (3) and located at the rear side of the motor placing box (7), and a coupling placing box (9) penetrates between the motor placing box (7) and the side opposite to the gear box (8).
4. The air-powder adjusting system for the boiler pulverizing system according to claim 3, characterized in that the inner wall of the motor placing box (7) is provided with a motor (10), the output shaft of the motor (10) is fixedly connected with a connecting shaft (11), the left end of the connecting shaft (11) sequentially penetrates through the motor placing box (7), the coupling placing box (9) and the gear box (8) and extends to the inside of the gear box (8), and the left side of the connecting shaft (11) is fixedly connected with a first bevel gear (12).
5. The air and pulverized coal conditioning system for a boiler pulverizing system as claimed in claim 3, a first gear (13) is rotatably connected to the rear part of the right side of the gear box (8), a speed limiter (14) is fixedly connected to the back surface of the first gear (13), a second gear (18) is rotatably connected to the right side of the gear box (8) and positioned in front of the first gear (13), a second bevel gear (15) is rotationally connected to the right side of the gear box (8) and positioned in front of the second gear (18), the first gear (13) is meshed with a second gear (18), the second gear (18) is meshed with a second bevel gear (15), a speed reduction plate (16) is fixedly connected to the right side of the gear box (8) and positioned at the rear side of the first gear (13), the front side of the speed reducing plate (16) is fixedly connected with a control switch (17).
6. The air-powder adjusting system for the boiler pulverizing system according to claim 5, characterized in that the speed limiter (14) comprises a speed limiting housing (141), the left side of the speed limiting housing (141) is fixedly connected with the right side of the first gear (13), the bottom of the inner wall of the speed limiting housing (141) is fixedly connected with a spring (142), the top of the spring (142) is fixedly connected with a speed limiting rod (143), and the top of the speed limiting rod (143) is fixedly connected with a speed limiting plate (144).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728299.7U CN211146541U (en) | 2019-10-15 | 2019-10-15 | Air-powder adjusting system for boiler pulverizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728299.7U CN211146541U (en) | 2019-10-15 | 2019-10-15 | Air-powder adjusting system for boiler pulverizing system |
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| Publication Number | Publication Date |
|---|---|
| CN211146541U true CN211146541U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921728299.7U Expired - Fee Related CN211146541U (en) | 2019-10-15 | 2019-10-15 | Air-powder adjusting system for boiler pulverizing system |
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| CN (1) | CN211146541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114178036A (en) * | 2021-10-15 | 2022-03-15 | 广东红海湾发电有限公司 | Inlet primary air volume and primary air pressure control method of coal mill |
-
2019
- 2019-10-15 CN CN201921728299.7U patent/CN211146541U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114178036A (en) * | 2021-10-15 | 2022-03-15 | 广东红海湾发电有限公司 | Inlet primary air volume and primary air pressure control method of coal mill |
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Granted publication date: 20200731 Termination date: 20211015 |