CN218475118U - Be applied to guide plate device among layer combustion stove SCR deNOx systems - Google Patents
Be applied to guide plate device among layer combustion stove SCR deNOx systems Download PDFInfo
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- CN218475118U CN218475118U CN202221713971.7U CN202221713971U CN218475118U CN 218475118 U CN218475118 U CN 218475118U CN 202221713971 U CN202221713971 U CN 202221713971U CN 218475118 U CN218475118 U CN 218475118U
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Abstract
The utility model relates to a flow guide plate device applied to a grate-fired furnace SCR denitration system, which comprises a plurality of rotating shafts, a plurality of flow guide baffles, a moving assembly and a rotating assembly, the utility model drives an active external gear to rotate through a moving motor, the active external gear synchronously drives a plurality of passive external gears to rotate in an internal gear, as the passive external gears are respectively sleeved at one ends of the rotating shafts extending out of the pipe wall of a smoke exhaust pipe in a sliding way, the passive external gears drive the rotating shafts and the flow guide baffles to move greatly in the smoke exhaust pipe, thereby greatly changing the smoke flow in the smoke exhaust pipe; then drive the drive pulley through rotating the motor, the drive pulley drives a plurality of driven belt pulleys through the belt and rotates, because a plurality of driven belt pulleys are fixed respectively in the one end that a plurality of pivots stretch out the pipe wall of exhaust pipe, a plurality of driven belt pulleys will drive a plurality of pivots and rotate to the angle of adjustment water conservancy diversion baffle, and then the flue gas flow in the small-amplitude adjustment exhaust pipe.
Description
Technical Field
The utility model relates to the technical field of, in particular to be applied to guide plate device among grate-fired furnace SCR deNOx systems.
Background
Coal is the largest energy support in China, and how to utilize coal and how to solve the environmental problems brought by coal development and utilization become the key points of attention of all social circles. Nitrogen oxides (NOx) are key atmospheric pollutants in coal burning processes and pose direct or indirect hazards to the environment, buildings, animals, plants, and humans.
With the continuous and severe environmental requirements, the denitration technology is also continuously deepened and developed. The Selective Catalytic Reduction (SCR) technology has the advantages of high efficiency, reliability, simple structure and the like, is widely applied to coal-fired boilers, and has remarkable influence on denitration efficiency due to the reasonable structure of the SCR flue gas denitration device under the condition that a certain catalyst is selected, wherein the reasonable guide plate installation scheme in the device is the key for ensuring the uniform flow velocity distribution of flue gas on the surface of the catalyst and the uniform molar distribution of NH 3/NOx.
The structural optimization of the SCR flue gas denitration device means that a certain technical means is adopted, and aiming at the preliminarily designed SCR flue gas denitration device, an installation scheme of internal guide plates (including the types, the number and the positions of the guide plates) is provided, so that the SCR flue gas denitration device is ensured to have a reasonable structure. Because the automation control degree of the industrial boiler is low, the boiler is controlled mainly by the experience of a furnace, the system failure rate is high, the air leakage condition is serious, and the flow field of a flue is easy to be unstable after engineering transformation, so that the position of the denitration guide plate can not be ensured to be always in the optimal state.
In order to solve the problem, the current research direction is developed around two directions, on one hand, the inclination angle shape of the guide plate is changed, so that the guide plate has better performance under more flue gas flow fields, on the other hand, the variable guide plate structure is provided, so that the position of the variable guide plate structure is variable, and the up-down position, the front-back position or the inclination angle of the guide plate is changed when the flue gas flow field is changed, so that the denitration efficiency is improved.
In recent years, with the continuous development of energy-saving and environment-friendly technologies, a plurality of research institutions research and development variable denitration guide plate structures, but most of the changes are single, and the guide plate structures which can be changed in multiple directions are rarely provided. Patent CN 202020442653.6 discloses an SCR denitration flow guide system with adjustable inclination angle, which monitors the speed distribution in a flue by setting a speed monitoring point, and further monitors the distribution uniformity of flue gas in the flue, when the inlet flue gas amount changes, the inlet flue gas amount distribution is adjusted by rotating a flat plate and matching with an execution rod, so that the flue gas uniformity at the SCR inlet is improved, but the device only can change the angle of a denitration guide plate, the position change of the denitration guide plate cannot be realized, and when the severe working condition changes, the effect is poor; patent CN 202021556447.4 discloses a "translation regulation formula denitration guide plate structure", the device sets up guide plate group in SCR entry flue department, be equipped with the guide slot on the wall of both sides around the flue casing, the side of translation guide plate has the guide arm, still be equipped with actuating mechanism on the flue casing, the flow that the denitration catalyst layer was passed through to planning flue gas that can be reasonable, guarantee the reaction of denitration catalyst layer complete, it is very fast to avoid local reaction, but the device only enables guide plate group and removes in specific direction, and can not realize the change of denitration guide plate angle, to the violent change of operating mode or the unstable industrial boiler of burning, can't adjust into the best flow field.
Therefore, how to provide a guide plate device that is applied to in grate-fired furnace SCR deNOx systems, both can change the guide plate position by a wide margin, can adjust the angle of guide plate again, the flow field of adjustment SCR entry flue improves the flow field homogeneity and is the problem that technical staff in the field need to solve urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be applied to guide plate device among layer burning furnace SCR deNOx systems solves current coal fired industrial boiler SCR flue gas denitration water conservancy diversion baffle and can not change the technical problem of guide plate position, change guide plate angle simultaneously by a wide margin.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a guide plate device applied to a grate-fired furnace SCR denitration system comprises a first flue gas concentration sensor, an ammonia injection grid, a rectification grid, a catalytic device and a second flue gas concentration sensor, wherein the first flue gas concentration sensor, the ammonia injection grid, the rectification grid, the catalytic device and the second flue gas concentration sensor are sequentially fixed in a smoke exhaust pipe of the grate-fired furnace along the smoke exhaust direction of the smoke exhaust pipe and comprise a plurality of rotating shafts, a plurality of flow guide baffles, a moving assembly and a rotating assembly,
the rotating shafts are arranged between the ammonia injection grating and the rectifying grating along the direction vertical to the smoke exhaust direction, and two ends of the rotating shafts are rotatably connected to the opposite pipe walls of the smoke exhaust pipe; the guide baffles are fixed on the rotating shafts along the direction vertical to the smoke discharge direction of the smoke discharge pipe;
the moving assembly comprises a moving motor, an inner gear, a driving outer gear and a plurality of driven outer gears, and the moving motor is fixed on the outer pipe wall of the smoke exhaust pipe; the inner gear is fixed on the outer pipe wall of the smoke exhaust pipe; the driving external gear is in transmission connection with an output shaft of the moving motor; the driven external gears are respectively sleeved at one ends of the rotating shafts extending out of the smoke exhaust pipe in a sliding manner, one side of each driven external gear is meshed with the driving external gear, and the other side of each driven external gear is meshed with the internal gear;
the rotating assembly comprises a rotating motor and a plurality of driven belt pulleys, the rotating motor is fixed on the outer pipe wall of the smoke exhaust pipe, and an output shaft of the rotating motor is in transmission connection with a driving belt pulley; the driven belt pulleys are fixed at one ends of the rotating shafts extending out of the smoke exhaust pipe and are in transmission connection with the driving belt pulley through belts respectively.
The beneficial effects of the utility model are that: the technical defect that a guide plate device in a traditional grate-fired furnace SCR denitration system can only change the position of a guide baffle or can only adjust the angle of the guide baffle is overcome, firstly, a moving motor drives an active external gear to rotate, the active external gear synchronously drives a plurality of passive external gears to rotate in an internal gear, the plurality of passive external gears are respectively sleeved at one ends of a plurality of rotating shafts extending out of the pipe wall of a smoke exhaust pipe in a sliding manner, and the plurality of passive external gears drive the rotating shafts and the guide baffle to move greatly in the smoke exhaust pipe, so that the smoke flow in the smoke exhaust pipe is greatly changed, and the smoke denitration efficiency dip moment is adapted; then, the driving belt pulley is driven by rotating the motor, the driving belt pulley drives the driven belt pulleys to rotate through the belt, the driven belt pulleys are respectively fixed at one ends of the rotating shafts, extending out of the wall of the smoke exhaust pipe, and the driven belt pulleys drive the rotating shafts to rotate, so that the angle of the diversion baffle is adjusted, the smoke flow in the smoke exhaust pipe is adjusted in a small scale, and the uniformity of a smoke flow field is improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
The transmission belt pulley is rotationally connected to the driving external gear and is respectively in transmission connection with the driving belt pulley and one driven belt pulley through a belt; one driven pulley is in transmission connection with a plurality of other driven pulleys through belts.
The smoke exhaust pipe is characterized by further comprising a plurality of tension pulleys, wherein the tension pulleys are respectively and rotationally fixed on the end surfaces, far away from the smoke exhaust pipe, of the driving external gear and the driven external gears; the belt before the passive pulleys is wound around the tension pulleys.
The driving external gear is in transmission connection with the output end of the movable speed reducer.
Further, still include and rotate the reduction gear, the input of rotating the reduction gear with the output transmission of rotating the motor is connected, drive pulley passes through belt transmission and connects the output of rotating the reduction gear.
The dustproof cover is arranged among the inner gear, the driving outer gear, the plurality of driven outer gears and the smoke exhaust pipe and is fixed on the smoke exhaust pipe; one end of each of the rotating shafts penetrates through the dust cover.
Adopt above-mentioned further beneficial effect to be: the dust cover can block the smoke discharged from the gaps between the smoke discharge pipe and the rotating shafts.
Furthermore, the rotating shafts are all made of Q235 carbon steel, the length of each rotating shaft is 2100-2400 mm, and the outer diameter of each rotating shaft is 40-60 mm
Furthermore, the plurality of guide baffles are made of Q235 carbon steel, the length of each guide baffle is 1500-1900 mm, and the width of each guide baffle is 500-600 mm.
Furthermore, the plurality of flow guide baffles are arc-shaped plates with the radius of 800 mm-1000 mm, and the radian of each arc-shaped plate is 33-37 degrees.
The baffle plate is characterized by further comprising a plurality of reinforcing ribs, and the plurality of reinforcing ribs are respectively fixed on the plate surfaces of the plurality of flow guide baffle plates.
Drawings
FIG. 1 is a schematic structural view of a guide plate device installed in a smoke exhaust pipe of a grate-fired furnace, which is applied to an SCR denitration system of the grate-fired furnace of the utility model;
FIG. 2 is a schematic structural view of a part of a moving assembly applied to an SCR denitration system of a grate-fired furnace of the present invention;
FIG. 3 is a schematic view of a part of a rotary component of the SCR denitration system of the grate-fired furnace of the present invention;
fig. 4 is the utility model relates to a be applied to removal subassembly and rotating assembly schematic structure among layer combustion stove SCR deNOx systems.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a first flue gas concentration sensor, 2, an ammonia spraying grid, 3, a rectifying grid, 4, a catalytic device, 5, a second flue gas concentration sensor, 6, a smoke exhaust pipe, 7, a rotating shaft, 8, a flow guide baffle plate, 9, a moving assembly, 91, a moving motor, 92, an internal gear, 93, an external driving gear, 94, an external driven gear, 95, a moving speed reducer, 10, a rotating assembly, 101, a rotating motor, 102, a driven belt pulley, 103, a transmission belt pulley, 104, a tension pulley, 105, a moving speed reducer, 11 and a dust cover.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a deflector apparatus applied to a grate-fired furnace SCR denitration system includes: a plurality of rotating shafts 7, a plurality of diversion baffles 8, a moving assembly 9 and a rotating assembly 10,
the rotating shafts 7 are arranged between the ammonia injection grid 2 and the rectifying grid 3 of the SCR denitration system of the grate-fired furnace along the smoke discharge direction of the smoke discharge pipe 6 of the vertical grate-fired furnace, and two ends of each rotating shaft are rotatably connected to the opposite pipe walls of the smoke discharge pipe 6; the plurality of flow guide baffles 8 are all fixed on the plurality of rotating shafts 7 along the smoke discharge direction of the vertical smoke discharge pipe 6;
the moving assembly 9 comprises a moving motor 91, an inner gear 92, a driving outer gear 93 and a plurality of driven outer gears 94, and the moving motor 91 is fixed on the outer pipe wall of the smoke exhaust pipe 6; the inner gear 92 is fixed on the outer pipe wall of the smoke exhaust pipe 6; the driving external gear 93 is in transmission connection with an output shaft of the moving motor 91; the plurality of driven external gears 94 are respectively sleeved at one ends of the plurality of rotating shafts 7 extending out of the smoke exhaust pipe 6 in a sliding manner, one side of each driven external gear is meshed with the driving external gear 93, and the other side of each driven external gear is meshed with the internal gear 92;
the rotating assembly 10 comprises a rotating motor 101 and a plurality of driven belt pulleys 102, the rotating motor 101 is fixed on the outer pipe wall of the smoke exhaust pipe 6, and an output shaft of the rotating motor is in transmission connection with a driving belt pulley; the driven belt pulleys 102 are all fixed at one ends of the rotating shafts 7 extending out of the smoke exhaust pipe 6 and are respectively in transmission connection with the driving belt pulley through belts.
In some embodiments, a driving pulley 103 may be further included, the driving pulley 103 is rotatably connected to the external driving gear 93 and is in driving connection with the driving pulley and one driven pulley 102 through belts; one driven pulley 102 is in transmission connection with a plurality of other driven pulleys 102 through belts.
In some specific embodiments, a plurality of tension pulleys 104 may be further included, and the plurality of tension pulleys 104 are respectively rotationally fixed on end surfaces of the driving external gear 93 and the driven external gears 94 far away from the smoke exhaust pipe 6; the belt before the plurality of driven pulleys 102 is wound around a plurality of tension pulleys 104 adjacent thereto.
In some embodiments, a movement reducer 95 may be further included, an input end of the movement reducer 95 is in transmission connection with an output end of the movement motor 91, and the external driving gear 93 is in transmission connection with an output end of the movement reducer 95.
In some embodiments, a rotation reducer 105 is further included, an input end of the rotation reducer 105 is in transmission connection with an output end of the rotation motor 101, and a driving pulley is in transmission connection with an output end of the rotation reducer 105 through a belt.
In some embodiments, a dust cover 11 may be further included, the dust cover 11 is disposed between the inner gear 92, the driving outer gear 93, the plurality of driven outer gears 94, and the smoke exhaust pipe 6 and fixed on the smoke exhaust pipe 6; one end of each of the plurality of rotating shafts 7 passes through the dust cover 11.
In some embodiments, the plurality of shafts 7 may be made of Q235 carbon steel, and each of the length thereof is 2100 to 2400mm, and the outer diameter thereof is 40 to 60mm.
In some embodiments, the plurality of baffle plates 8 may be made of Q235 carbon steel, and have a length of 1500-1900 mm and a width of 500-600 mm.
In some embodiments, the plurality of baffle plates 8 can be arc-shaped plates with the radius of 800 mm-1000 mm, and the radian of the arc-shaped plates is 33-37 degrees.
In some embodiments, a plurality of reinforcing ribs may be further included, and the plurality of reinforcing ribs are respectively fixed on the plate surfaces of the plurality of baffle plates 8.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a be applied to guide plate device among layer combustion stove SCR deNOx systems which characterized in that includes: a plurality of rotating shafts (7), a plurality of diversion baffles (8), a moving component (9) and a rotating component (10),
the rotating shafts (7) are arranged between the ammonia injection grid (2) and the rectification grid (3) of the SCR denitration system of the grate-fired furnace along the smoke discharge direction vertical to the smoke discharge pipe (6) of the grate-fired furnace, and two ends of each rotating shaft are rotatably connected to the opposite pipe walls of the smoke discharge pipe (6); the guide baffles (8) are all fixed on the rotating shafts (7) along the smoke discharge direction vertical to the smoke discharge pipe (6);
the moving assembly (9) comprises a moving motor (91), an internal gear (92), a driving external gear (93) and a plurality of driven external gears (94), and the moving motor (91) is fixed on the outer pipe wall of the smoke exhaust pipe (6); the inner gear (92) is fixed on the outer pipe wall of the smoke exhaust pipe (6); the driving external gear (93) is in transmission connection with an output shaft of the moving motor (91); the driven external gears (94) are respectively sleeved at one ends of the rotating shafts (7) extending out of the smoke exhaust pipe (6) in a sliding manner, one side of each driven external gear is meshed with the driving external gear (93), and the other side of each driven external gear is meshed with the internal gear (92);
the rotating assembly (10) comprises a rotating motor (101) and a plurality of driven belt pulleys (102), the rotating motor (101) is fixed on the outer pipe wall of the smoke exhaust pipe (6), and an output shaft of the rotating motor is in transmission connection with a driving belt pulley; the driven belt pulleys (102) are fixed at one ends of the rotating shafts (7) extending out of the smoke exhaust pipe (6) and are in transmission connection with the driving belt pulleys through belts respectively.
2. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, further comprising a transmission pulley (103), wherein the transmission pulley (103) is rotatably connected to the external driving gear (93) and is in transmission connection with the driving pulley and one of the driven pulleys (102) respectively through belts; one driven pulley (102) is in transmission connection with a plurality of other driven pulleys (102) through belts.
3. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, further comprising a plurality of tension pulleys (104), wherein the plurality of tension pulleys (104) are respectively and rotationally fixed on the end surfaces of the driving external gear (93) and the driven external gears (94) far away from the smoke exhaust pipe (6); the belt before the plurality of passive pulleys (102) is wound around the plurality of tension pulleys (104) adjacent thereto.
4. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, further comprising a movement reducer (95), wherein an input end of the movement reducer (95) is in transmission connection with an output end of the movement motor (91), and the external drive gear (93) is in transmission connection with an output end of the movement reducer.
5. The deflector device applied to the SCR denitration system of the grate-fired furnace as recited in claim 1, further comprising a rotation reducer (105), wherein an input end of said rotation reducer (105) is in transmission connection with an output end of said rotating motor (101), and said driving pulley is in transmission connection with an output end of said rotation reducer (105) through a belt.
6. The deflector device applied to the SCR denitration system of the grate-fired furnace, according to claim 1, further comprising a dust cover (11), wherein the dust cover (11) is disposed between the inner gear (92), the external driving gear (93), the plurality of external passive gears (94) and the smoke exhaust pipe (6) and fixed on the smoke exhaust pipe (6); one end of each of the rotating shafts (7) penetrates through the dust cover (11).
7. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, wherein the plurality of rotating shafts (7) are made of Q235 carbon steel, the length of each rotating shaft is 2100-2400 mm, and the outer diameter of each rotating shaft is 40-60 mm.
8. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, wherein the plurality of deflector baffles (8) are made of Q235 carbon steel, the length of the deflector is 1500-1900 mm, and the width of the deflector is 500-600 mm.
9. The flow guide plate device applied to the SCR denitration system of the grate-fired furnace according to claim 1, wherein the plurality of flow guide baffle plates (8) are all arc-shaped plates with the radius of 800 mm-1000 mm, and the radian of each arc-shaped plate is 33-37 degrees.
10. The deflector device applied to the SCR denitration system of the grate-fired furnace according to claim 1, further comprising a plurality of reinforcing ribs, wherein the plurality of reinforcing ribs are respectively fixed on the plate surfaces of the plurality of deflector baffles (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221713971.7U CN218475118U (en) | 2022-06-28 | 2022-06-28 | Be applied to guide plate device among layer combustion stove SCR deNOx systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221713971.7U CN218475118U (en) | 2022-06-28 | 2022-06-28 | Be applied to guide plate device among layer combustion stove SCR deNOx systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116272362A (en) * | 2023-04-19 | 2023-06-23 | 合肥中亚环保科技有限公司 | SCR flue gas denitration reaction guide plate and denitration reaction container |
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2022
- 2022-06-28 CN CN202221713971.7U patent/CN218475118U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116272362A (en) * | 2023-04-19 | 2023-06-23 | 合肥中亚环保科技有限公司 | SCR flue gas denitration reaction guide plate and denitration reaction container |
| CN116272362B (en) * | 2023-04-19 | 2024-01-09 | 合肥中亚环保科技有限公司 | SCR flue gas denitration reaction guide plate and denitration reaction container |
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