CN115888465B - Rotary driving system suitable for long-term operation of high-temperature high-dust flue gas - Google Patents
Rotary driving system suitable for long-term operation of high-temperature high-dust flue gas Download PDFInfo
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- CN115888465B CN115888465B CN202211050505.XA CN202211050505A CN115888465B CN 115888465 B CN115888465 B CN 115888465B CN 202211050505 A CN202211050505 A CN 202211050505A CN 115888465 B CN115888465 B CN 115888465B
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- rotating shaft
- long
- protective cover
- pivot
- flue gas
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- 239000000428 dust Substances 0.000 title claims abstract description 22
- 230000007774 longterm Effects 0.000 title claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000003546 flue gas Substances 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- 238000000605 extraction Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Chimneys And Flues (AREA)
Abstract
The invention discloses a rotary driving system suitable for long-term operation of high-temperature high-dust flue gas, which comprises a motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a protective cover, a rotating device and a flue, wherein the motor is arranged on the first rotating shaft; the export of safety cover is located the flue, the entry of safety cover is located outside the flue, the output shaft of motor is connected with the one end of first pivot, the other end of first pivot is connected with the one end of second pivot, the other end of second pivot inserts in the safety cover through the entry of safety cover and is connected with the one end of third pivot, the other end of third pivot stretches out the safety cover through the export of safety cover and is connected with rotary device, be provided with the impeller that bleeds in the third pivot, this system lightens transmission system's heat altered shape, the stifled ash and wearing and tearing appear near eliminating the pivot, guarantee rotary mechanism long-term steady operation.
Description
Technical Field
The invention belongs to the field of treatment of smoke pollutants in a thermal power plant, and relates to a rotary driving system suitable for long-term operation of high-temperature high-dust smoke.
Background
At present, an SCR (selective catalytic reduction) denitration process is generally adopted in thermal power plants in China to remove nitrogen oxides generated after fuel combustion, and because the optimal temperature of the activity of an SCR catalyst is about 350 ℃, a denitration device is generally arranged between an economizer and an air preheater with the smoke temperature of about 300-400 ℃, the requirements of the SCR denitration process can be met, but the smoke concentration at the denitration device is very high and can reach tens of grams per cubic meter. The denitration inlet flue gas generally needs to be subjected to local mixing, diversion and other measures so as to meet the requirements of certain concentration and speed uniformity. The method adopted at present is to install a static mixer in the flue 11 to force the flue gas to generate vortex, disperse and mix, so as to achieve a certain mixing effect, and the method is a passive mixing method relying on the kinetic energy of the fluid, and has the advantages of convenient maintenance and repair, difficult failure generation, but the mixing effect of the static mixer is very limited, and wide-range full mixing cannot be achieved under many conditions. If a dynamic rotation forced mixing active mixing device can be developed, the mixing effect can be greatly improved, but the core problem is how to ensure the reliability and stability of the rotation mechanism in a high-temperature and high-smoke environment, and how to avoid the phenomenon that the rotation part is not easy to block ash, abrade, deform at high temperature and the like, so as to achieve long-term stable operation. Thus, no corresponding device has been developed in SCR denitration processes, nor has there been any application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a rotary driving system suitable for long-term operation of high-temperature high-dust smoke, which reduces the thermal deformation of a transmission system, eliminates ash blocking and abrasion near a rotating shaft and ensures long-term stable operation of a rotary mechanism.
In order to achieve the above purpose, the rotary driving system suitable for long-term operation of high-temperature high-dust flue gas comprises a motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a protective cover, a rotating device and a flue;
the outlet of safety cover is located the flue, and the entry of safety cover is located outside the flue, and the output shaft of motor is connected with the one end of first pivot, and the other end of first pivot is connected with the one end of second pivot, and the other end of second pivot is connected with the one end of third pivot after inserting in the safety cover through the entry of safety cover, and the other end of third pivot is connected with rotary device after stretching out the safety cover through the export of safety cover, is provided with the impeller of bleeding in the third pivot.
The protection cover is connected with the second rotating shaft and the third rotating shaft through brackets.
The output shaft of the motor is connected with the first rotating shaft through a coupler.
The output shaft and the first rotating shaft of the motor are positioned on the bearing seat.
Bearings are arranged between the bracket and the first rotating shaft and between the bracket and the second rotating shaft.
The entrance of safety cover is provided with the filter screen.
The protective cover is of an L-shaped structure.
The first rotating shaft is connected with the second rotating shaft and the second rotating shaft is connected with the third rotating shaft through gear sets.
The invention has the following beneficial effects:
when the rotary driving system suitable for long-term running of high-temperature high-dust flue gas is specifically operated, the motor drives the air extraction impeller to rotate, so that external air passes through the protective cover, the transmission system is cooled by the external air, meanwhile, the flue gas in the flue is prevented from entering the protective cover, ash blocking and abrasion are eliminated near the rotating shaft, long-term stable running of the rotary mechanism is ensured, the problems of self-cooling and self-shielding smoke dust of the transmission system are solved, and core technical support is provided for further developing a dynamic rotary stirring and mixing device in a high-temperature high-dust environment.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The device comprises a motor 1, a bearing seat 2, a coupling 3, a gear set 4, a bracket 5, a bearing 6, a first rotating shaft 71, a second rotating shaft 72, a third rotating shaft 73, a protective cover 8, an air extraction impeller 9, a rotating device 10, a flue 11 and a filter screen 12.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the accompanying drawings, there is shown a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
Referring to fig. 1, the rotary driving system for adapting to long-term operation of high-temperature high-dust flue gas according to the invention comprises a motor 1, a bearing seat 2, a coupler 3, a gear set 4, a bracket 5, a bearing 6, a first rotating shaft 71, a second rotating shaft 72, a third rotating shaft 73, a protective cover 8, an air extraction impeller 9, a rotating device 10, a flue 11 and a filter screen 12;
The outlet of the protection cover 8 is positioned in the flue 11, the inlet of the protection cover 8 is positioned outside the flue 11, the output shaft of the motor 1 is connected with one end of the first rotating shaft 71, the other end of the first rotating shaft 71 is connected with one end of the second rotating shaft 72, the other end of the second rotating shaft 72 is inserted into the protection cover 8 through the inlet of the protection cover 8 and then is connected with one end of the third rotating shaft 73, the other end of the third rotating shaft 73 extends out of the protection cover 8 through the outlet of the protection cover 8 and then is connected with the rotating device 10, and a filter screen 12 is arranged at the inlet of the protection cover 8;
The output shaft of the motor 1 is connected with the first rotating shaft 71 through a coupling 3, the output shaft of the motor 1 and the first rotating shaft 71 are positioned on the bearing seat 2, and the first rotating shaft 71 and the second rotating shaft 72 and the third rotating shaft 73 are connected through a gear set 4.
The protection cover 8 is connected with the second rotating shaft 72 and the third rotating shaft 73 through the support 5, wherein bearings 6 are arranged between the support 5 and the first rotating shaft 71 and between the support 5 and the second rotating shaft 72, the air extraction impeller 9 is arranged on the third rotating shaft 73, and the protection cover 8 is of a L-shaped structure.
The specific working process of the invention is as follows:
Starting the motor 1, the motor 1 drives the air extraction impeller 9 and the rotating device 10 to work through the first rotating shaft 71, the second rotating shaft 72 and the third rotating shaft 73, the air extraction impeller 9 rotates, so that external air enters the protective cover 8 after being filtered by the filter screen 12, passes through the protective cover 8 and is discharged from an outlet of the protective cover 8, and is blown to the rotating device 10, in the process, the first rotating shaft 71, the second rotating shaft 72, the third rotating shaft 73, the air extraction impeller 9 and the rotating device 10 are blown and cooled through the external air, so that the thermal deformation of a transmission system is lightened, meanwhile, smoke is prevented from entering the protective cover 8, ash blocking and abrasion are avoided near the rotating shaft, and long-term stable operation of the rotating mechanism is ensured.
The protective cover 8 in the present invention serves three functions: firstly, the fixed end of the internal support 5 is used for keeping the position of an internal shafting; secondly, the transmission component in the interior can be protected from being in direct contact with smoke and dust abrasion; thirdly, a channel for air to enter can be provided to provide cooling air to enter, and the filter screen 12 plays a role in filtering air to prevent sundries from being sucked into the protective cover 8.
The suction impeller 9 in the present invention functions as: on the one hand, the components such as the shaft, the bearing 6, the gear set and the like are cooled, on the other hand, cooling air is sprayed into smoke from the outlet of the protective cover 8, so that smoke dust in the smoke dust can be blown away from the outlet of the protective cover 8, the smoke dust is prevented from entering the transmission system, abrasion is generated on the inner components, and the effect of isolating the smoke dust is achieved.
Claims (7)
1. The rotary driving system suitable for long-term operation of high-temperature high-dust flue gas is characterized by comprising a motor (1), a first rotating shaft (71), a second rotating shaft (72), a third rotating shaft (73), a protective cover (8), a rotary device (10) and a flue (11);
The outlet of the protective cover (8) is positioned in the flue (11), the inlet of the protective cover (8) is positioned outside the flue (11), the output shaft of the motor (1) is connected with one end of the first rotating shaft (71), the other end of the first rotating shaft (71) is connected with one end of the second rotating shaft (72), the other end of the second rotating shaft (72) is inserted into the protective cover (8) through the inlet of the protective cover (8) and then is connected with one end of the third rotating shaft (73), the other end of the third rotating shaft (73) extends out of the protective cover (8) through the outlet of the protective cover (8) and then is connected with the rotating device (10), and the third rotating shaft (73) is provided with an air extraction impeller (9);
the protective cover (8) is of an L-shaped structure.
2. The rotary driving system for adapting to long-term operation of high-temperature high-dust flue gas according to claim 1, wherein the protection cover (8) is connected with the second rotating shaft (72) and the third rotating shaft (73) through the bracket (5).
3. The rotary drive system adapted to long-term operation of high-temperature high-dust flue gas according to claim 1, characterized in that the output shaft of the motor (1) is connected to the first rotating shaft (71) by means of a coupling (3).
4. A rotary drive system adapted to long-term operation of high temperature and high dust fumes according to claim 3, wherein the output shaft of the motor (1) and the first rotation shaft (71) are located on the bearing housing (2).
5. The rotary driving system adapted to long-term operation of high-temperature high-dust flue gas according to claim 2, wherein bearings (6) are arranged between the bracket (5) and the first rotating shaft (71) and the second rotating shaft (72).
6. The rotary drive system adapted to long-term operation of high-temperature high-dust flue gas according to claim 1, characterized in that a filter screen (12) is provided at the inlet of the protective cover (8).
7. The rotary driving system for adapting to long-term operation of high-temperature high-dust flue gas according to claim 1, wherein the first rotating shaft (71) and the second rotating shaft (72) and the third rotating shaft (73) are connected through a gear set (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211050505.XA CN115888465B (en) | 2022-08-29 | 2022-08-29 | Rotary driving system suitable for long-term operation of high-temperature high-dust flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211050505.XA CN115888465B (en) | 2022-08-29 | 2022-08-29 | Rotary driving system suitable for long-term operation of high-temperature high-dust flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115888465A CN115888465A (en) | 2023-04-04 |
| CN115888465B true CN115888465B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211050505.XA Active CN115888465B (en) | 2022-08-29 | 2022-08-29 | Rotary driving system suitable for long-term operation of high-temperature high-dust flue gas |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4016894A1 (en) * | 1990-05-25 | 1991-12-05 | Hoelter Heinz | Redn. of carbon monoxide, nitrous oxide and sulphur di:oxide - involves expeller-eddy producer mixing flue gas with secondary and tertiary air |
| CN2107553U (en) * | 1991-11-11 | 1992-06-17 | 国家建筑材料工业局西安砖瓦研究所 | Energy-saving fan for brick and tile manufacturing |
| JP2002126581A (en) * | 2000-10-26 | 2002-05-08 | Mic Kk | Flue gas treatment cyclone apparatus |
| CN101158363A (en) * | 2007-11-16 | 2008-04-09 | 江苏大学 | Bearing wind refrigerating mechanism of high-temperature pump |
| CN204637994U (en) * | 2015-05-27 | 2015-09-16 | 山东应天节能环保科技有限公司 | A kind of desulphurization denitration automatic control system |
| CN207401340U (en) * | 2017-10-11 | 2018-05-25 | 郝松 | A kind of coal steam-electric plant smoke denitrification apparatus |
| CN208082257U (en) * | 2017-10-20 | 2018-11-13 | 北京北科欧远科技有限公司 | A kind of rectangular eddy current type static mixer |
| CN209576362U (en) * | 2019-07-16 | 2019-11-05 | 北京博奇电力科技有限公司 | A kind of Novel SCR denitrating system static state vortex mixer |
| CN111237800A (en) * | 2020-02-17 | 2020-06-05 | 南京兆能节能科技有限公司 | Smoke circulation downstream ash blocking prevention system and ash blocking prevention method thereof |
| CN111437722A (en) * | 2020-05-14 | 2020-07-24 | 国电南京电力试验研究有限公司 | Vortex static mixer system and ammonia spraying flue gas mixing and adjusting method |
| CN213528139U (en) * | 2020-07-17 | 2021-06-25 | 西安西矿环保科技有限公司 | Vortex structure and flue gas denitration mixing arrangement |
-
2022
- 2022-08-29 CN CN202211050505.XA patent/CN115888465B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4016894A1 (en) * | 1990-05-25 | 1991-12-05 | Hoelter Heinz | Redn. of carbon monoxide, nitrous oxide and sulphur di:oxide - involves expeller-eddy producer mixing flue gas with secondary and tertiary air |
| CN2107553U (en) * | 1991-11-11 | 1992-06-17 | 国家建筑材料工业局西安砖瓦研究所 | Energy-saving fan for brick and tile manufacturing |
| JP2002126581A (en) * | 2000-10-26 | 2002-05-08 | Mic Kk | Flue gas treatment cyclone apparatus |
| CN101158363A (en) * | 2007-11-16 | 2008-04-09 | 江苏大学 | Bearing wind refrigerating mechanism of high-temperature pump |
| CN204637994U (en) * | 2015-05-27 | 2015-09-16 | 山东应天节能环保科技有限公司 | A kind of desulphurization denitration automatic control system |
| CN207401340U (en) * | 2017-10-11 | 2018-05-25 | 郝松 | A kind of coal steam-electric plant smoke denitrification apparatus |
| CN208082257U (en) * | 2017-10-20 | 2018-11-13 | 北京北科欧远科技有限公司 | A kind of rectangular eddy current type static mixer |
| CN209576362U (en) * | 2019-07-16 | 2019-11-05 | 北京博奇电力科技有限公司 | A kind of Novel SCR denitrating system static state vortex mixer |
| CN111237800A (en) * | 2020-02-17 | 2020-06-05 | 南京兆能节能科技有限公司 | Smoke circulation downstream ash blocking prevention system and ash blocking prevention method thereof |
| CN111437722A (en) * | 2020-05-14 | 2020-07-24 | 国电南京电力试验研究有限公司 | Vortex static mixer system and ammonia spraying flue gas mixing and adjusting method |
| CN213528139U (en) * | 2020-07-17 | 2021-06-25 | 西安西矿环保科技有限公司 | Vortex structure and flue gas denitration mixing arrangement |
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|---|---|
| CN115888465A (en) | 2023-04-04 |
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