CN213146604U - Flue gas denitration temperature regulating system based on flue gas recirculation technology - Google Patents
Flue gas denitration temperature regulating system based on flue gas recirculation technology Download PDFInfo
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- CN213146604U CN213146604U CN202021992006.9U CN202021992006U CN213146604U CN 213146604 U CN213146604 U CN 213146604U CN 202021992006 U CN202021992006 U CN 202021992006U CN 213146604 U CN213146604 U CN 213146604U
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Abstract
The utility model discloses a flue gas denitration temperature governing system based on flue gas recirculation technique belongs to coal-fired generating set technical field. A flue gas denitration temperature regulating system based on a flue gas recirculation technology comprises a boiler and a denitration tower, wherein a flue gas outlet cylinder and a flue gas return cylinder are fixedly connected to the boiler, the flue gas return cylinder is fixedly connected to the denitration tower, a first baffle and a second baffle are rotationally connected to the flue gas return cylinder, a first gear is fixedly connected to the first baffle, a second gear is fixedly connected to the second baffle, a sleeve is rotationally connected to the bottom of the flue gas return cylinder, a third gear is fixedly connected to the bottom of the sleeve, a rack is slidably connected to the bottom of the flue gas return cylinder, an induced draft fan is fixedly connected to the flue gas return cylinder, a heat insulation seat is fixedly connected to the boiler, a switch for controlling the induced draft fan is fixedly connected to the bottom of the flue gas return cylinder, and the rack is abutted; the utility model discloses can carry out the time of returning to the stove circulation according to the temperature of exhaust flue gas is automatic and heat up, and blocks the backward flow automatically when rising to suitable temperature.
Description
Technical Field
The utility model relates to a coal-fired generating set technical field especially relates to flue gas denitration temperature regulation system based on flue gas recirculation technique.
Background
Since thirteen five years, the deep peak regulation application of the thermal power generating unit is increasingly an urgent subject faced by the current power industry, aiming at the phenomenon that the emerging energy of solar energy, wind power and hydropower abandons electricity seriously, the energy supply bureau formally starts to improve the flexibility of thermal power and reform the demonstration test point work in 2016, 6 months and 14 days, and during the thirteen five days, the flexibility reformation scale reaches 2.2 hundred million kilowatts, wherein the thermal power generating unit is 1.33 hundred million kilowatts (mainly in the three northeast regions), and the straight condensing unit is 0.87 hundred million kilowatts, which accounts for about 25 percent of the existing coal power installation.
The conditions of various power plants such as furnace types and coal types are different, the smoke temperature-load curves are different, but the smoke temperature reduction trend along with the load is the same, if no measures are taken, the SCR of some power plants stops running because the SCR can not reach the inlet smoke temperature at about 50% of load, the SCR inlet smoke temperature is reduced more at 30% of load or even 20% of load in the future, and the improvement of the denitration front exhaust smoke temperature becomes an important subject under the low-load working condition.
Disclosure of Invention
The utility model aims at solving the problem that the flue gas temperature descends along with the load and influences the denitration effect, and the flue gas denitration temperature regulation system based on flue gas recirculation technique that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flue gas denitration temperature regulating system based on a flue gas recirculation technology comprises a boiler and a denitration tower, wherein a smoke outlet tube and a smoke return tube are fixedly connected to the boiler, the smoke return tube is fixedly connected to the denitration tower, the smoke outlet tube is fixedly connected to the smoke return tube, a piston tube is fixedly connected in the smoke outlet tube, a piston handle is connected in the piston tube in a sliding manner, a piston rod is fixedly connected to the piston handle, the piston rod is connected in the smoke return tube in a sliding manner, a first baffle and a second baffle are connected in the smoke return tube in a rotating manner, a first gear is fixedly connected to the first baffle, a second gear is fixedly connected to the second baffle, a sleeve is rotatably connected to the bottom of the smoke return tube, a third gear is fixedly connected to the bottom of the sleeve, a rack is slidably connected to the bottom of the smoke return tube, and the rack is respectively meshed with the first gear, the second gear and the third gear, fixedly connected with draught fan on the time flue section of thick bamboo, fixedly connected with heat insulating seat on the draught fan, heat insulating seat fixed connection is on the boiler, time flue section of thick bamboo bottom fixedly connected with is used for controlling the switch of draught fan, the rack offsets with the switch.
Preferably, a fixing frame is fixedly connected in the smoke outlet tube, and the piston tube is fixedly connected to the fixing frame.
Preferably, a first rotating shaft is fixedly connected to the first baffle, a first rotating ring is fixedly connected to the first rotating shaft, the first rotating ring is rotatably connected to the smoke returning cylinder, and the first gear is fixedly connected to the first rotating shaft.
Preferably, a second rotating shaft is fixedly connected to the second baffle, a second rotating ring is fixedly connected to the second rotating shaft, the second rotating ring is rotatably connected to the smoke returning cylinder, and the second gear is fixedly connected to the second rotating shaft.
Preferably, the bottom of the smoke returning cylinder is fixedly connected with a first connecting rod and a second connecting rod, the first connecting rod is fixedly connected with a rotating base, the sleeve is fixedly connected with a third rotating ring, the rotating base is provided with a rotating groove matched with the third rotating ring, the second connecting rod is fixedly connected with a guide cylinder, and the rack is slidably connected in the guide cylinder.
Preferably, the piston rod is provided with a convex block, the sleeve is internally provided with a spiral groove, the convex block is connected in the spiral groove in a sliding manner, the bottom of the smoke returning cylinder is fixedly connected with a hinged block, the hinged block is internally and fixedly connected with a sealing ring, and the sealing ring is attached to the piston rod.
Compared with the prior art, the utility model provides a flue gas denitration temperature regulation system based on flue gas recirculation technique possesses following beneficial effect:
1. the flue gas denitration temperature regulating system based on the flue gas recirculation technology comprises a flue gas outlet tube, a first baffle plate is in a closed state at a proper temperature, a second baffle plate is in an open state, when the temperature of flue gas is too low to support denitration reaction, gas in a piston tube can shrink, a piston handle slides upwards to drive a piston rod to slide upwards, a lug on the piston rod slides in a spiral groove formed in a sleeve to enable the sleeve to rotate, a third gear rotates to drive a rack to slide, the rack slides to drive a second gear and a first gear which are meshed with the rack to rotate, so that the second baffle plate is closed, the first baffle plate is opened, the rack slides leftwards and can simultaneously abut against a switch, an induced draft fan works when abutting against the switch to guide the flue gas to flow back into the boiler for heating, the heated gas is discharged through the flue gas outlet tube again, the temperature promotes this moment, makes the interior air inflation of piston barrel when contacting the piston barrel to make the piston rod slide down, the third gear just can the reversal this moment, and first baffle just can be closed, and the second baffle is opened, and the switch also can be kept away from to the rack simultaneously, and the draught fan also stop work, and the flue gas after the intensification enters into the denitration tower and carries out the denitration.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas denitration temperature adjusting system based on a flue gas recirculation technology provided by the utility model;
fig. 2 is a schematic structural diagram of a portion a in fig. 1 of a flue gas denitration temperature adjusting system based on a flue gas recirculation technology according to the present invention;
fig. 3 is the utility model provides a flue gas denitration temperature governing system helicla flute's based on flue gas recirculation technique structural schematic.
In the figure: 1. a boiler; 101. a chimney; 1011. a fixed mount; 102. a smoke return pipe; 1021. a hinged block; 1022. a seal ring; 2. a denitration tower; 3. an induced draft fan; 301. a heat insulation seat; 302. a switch; 4. a piston cylinder; 401. a piston rod; 4011. a piston handle; 4012. a bump; 402. a sleeve; 4021. a third swivel; 4022. a third gear; 4023. a first link; 4024. rotating; 4025. a helical groove; 5. a first baffle plate; 501. a first swivel; 502. a first rotating shaft; 5021. a first gear; 6. a second baffle; 601. a second swivel; 602. a second rotating shaft; 6021. a second gear; 7. a rack; 701. a guide cylinder; 7011. a second link.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example (b):
referring to fig. 1-3, a flue gas denitration temperature adjusting system based on a flue gas recirculation technology comprises a boiler 1 and a denitration tower 2, wherein a flue gas outlet tube 101 and a flue gas return tube 102 are fixedly connected to the boiler 1, the flue gas return tube 102 is fixedly connected to the denitration tower 2, the flue gas outlet tube 101 is fixedly connected to the flue gas return tube 102, a piston tube 4 is fixedly connected to the interior of the flue gas outlet tube 101, a piston handle 4011 is slidably connected to the piston tube 4, a piston rod 401 is fixedly connected to the piston handle 4011, the piston rod 401 is slidably connected to the flue gas return tube 102, a first baffle 5 and a second baffle 6 are rotatably connected to the flue gas return tube 102, a first gear 5021 is fixedly connected to the first baffle 5, a second gear 6021 is fixedly connected to the second baffle 6, a sleeve 402 is rotatably connected to the bottom of the flue gas return tube 102, a third gear 4022 is fixedly connected to the bottom of the sleeve 402, a rack 7 is slidably connected to the bottom of, The second gear 6021 is engaged with the third gear 4022, the smoke return cylinder 102 is fixedly connected with the induced draft fan 3, the induced draft fan 3 is fixedly connected with the heat insulation seat 301, the heat insulation seat 301 is fixedly connected to the boiler 1, the bottom of the smoke return cylinder 102 is fixedly connected with the switch 302 for controlling the induced draft fan 3, the rack 7 is abutted against the switch 302, the smoke outlet cylinder 101 is internally and fixedly connected with the fixing frame 1011, the piston cylinder 4 is fixedly connected to the fixing frame 1011, the first baffle 5 is fixedly connected with the first rotating shaft 502, the first rotating ring 501 is fixedly connected to the first rotating shaft 502, the first rotating ring 501 is rotatably connected to the smoke return cylinder 102, the first gear 5021 is fixedly connected to the first rotating shaft 502, the second baffle 6 is fixedly connected with the second rotating shaft 602, the second rotating ring 601 is fixedly connected to the second rotating shaft 602, the second rotating ring 601 is rotatably connected to the smoke return cylinder 102, the second gear 6021 is fixedly connected to the second rotating shaft 602, the bottom of the smoke return cylinder 102 is fixedly connected with the first connecting rod 402, fixedly connected with swivel mount 4024 on first connecting rod 4023, fixedly connected with third swivel 4021 on the sleeve 402, seted up on swivel 4024 with third swivel 4021 complex rotary groove, fixedly connected with guide cylinder 701 on the second connecting rod 7011, rack 7 sliding connection is in guide cylinder 701, be equipped with lug 4012 on the piston rod 401, spiral groove 4025 has been seted up in the sleeve 402, lug 4012 sliding connection is in spiral groove 4025, return chimney 102 bottom fixedly connected with articulated piece 1021, fixedly connected with sealing washer 1022 in articulated piece 1021, sealing washer 1022 and the laminating of piston rod 401.
The working principle is as follows: in the utility model, the smoke generated in the boiler 1 is discharged through the smoke outlet pipe 101, the first baffle 5 is in a closed state under a proper temperature, the second baffle 6 is in an open state, when the smoke temperature is too low to support the denitration reaction, the gas in the piston barrel 4 can shrink, so that the piston handle 4011 slides upwards to drive the piston rod 401 to slide upwards, the lug 4012 on the piston rod 401 slides in the spiral groove 4025 arranged in the sleeve 402 to rotate the sleeve 402, thereby driving the third gear 4022 to rotate, the third gear 4022 rotates to drive the rack 7 to slide, the rack 7 slides to drive the second gear 6021 and the first gear 5021 which are engaged with the rack 7 to rotate, thereby the second baffle 6 is closed, the first baffle 5 is opened, the switch 302 can be collided when the rack 7 slides leftwards, the draught fan 3 works when the switch 302 is collided, the smoke is guided to flow back into the boiler 1 to heat up, gas after the intensification leads to out again through going out chimney 101, the temperature promotes this moment, makes the air inflation in the piston cylinder 4 when contacting piston cylinder 4 to make piston rod 401 lapse, third gear 4022 just can the reversal this moment, first baffle 5 just can be closed, second baffle 6 is opened, switch 302 also can be kept away from to rack 7 simultaneously, draught fan 3 also stop work, flue gas after the intensification enters into denitration tower 2 and carries out the denitration.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. Flue gas denitration temperature regulation system based on flue gas recirculation technology, including boiler (1) and denitration tower (2), its characterized in that, fixedly connected with goes out chimney (101) and returns chimney (102) on boiler (1), it is on denitration tower (2) to return chimney (102) fixed connection, go out chimney (101) fixed connection on returning chimney (102), go out chimney (101) internal fixation and be connected with piston section of thick bamboo (4), sliding connection has piston handle (4011) in piston section of thick bamboo (4), fixedly connected with piston rod (401) on piston handle (4011), piston rod (401) sliding connection is on returning chimney (102), it has first baffle (5) and second baffle (6) to return chimney (102) internal rotation, fixedly connected with first gear (5021) on first baffle (5), fixedly connected with second gear (6021) on second baffle (6), it is connected with sleeve (402) to return chimney (102) bottom rotation, sleeve (402) bottom fixedly connected with third gear (4022), it has rack (7) to return chimney (102) bottom sliding connection, rack (7) respectively with first gear (5021), second gear (6021) and third gear (4022) meshing, fixedly connected with draught fan (3) are gone up to return chimney (102), fixedly connected with heat insulating seat (301) are gone up in draught fan (3), heat insulating seat (301) fixed connection is on boiler (1), return chimney (102) bottom fixedly connected with is used for controlling switch (302) of draught fan (3), rack (7) offset with switch (302).
2. The flue gas denitration temperature regulating system based on flue gas recirculation technology as claimed in claim 1, wherein a fixing frame (1011) is fixedly connected in the flue gas outlet cylinder (101), and the piston cylinder (4) is fixedly connected on the fixing frame (1011).
3. The flue gas denitration temperature regulating system based on the flue gas recirculation technology as claimed in claim 1, wherein a first rotating shaft (502) is fixedly connected to the first baffle (5), a first rotating ring (501) is fixedly connected to the first rotating shaft (502), the first rotating ring (501) is rotatably connected to the flue gas returning barrel (102), and the first gear (5021) is fixedly connected to the first rotating shaft (502).
4. The flue gas denitration temperature adjusting system based on the flue gas recirculation technology of claim 3, wherein a second rotating shaft (602) is fixedly connected to the second baffle (6), a second rotating ring (601) is fixedly connected to the second rotating shaft (602), the second rotating ring (601) is rotatably connected to the flue gas returning cylinder (102), and the second gear (6021) is fixedly connected to the second rotating shaft (602).
5. The flue gas denitration temperature regulating system based on flue gas recirculation technology as claimed in claim 1, wherein a first connecting rod (4023) and a second connecting rod (7011) are fixedly connected to the bottom of the flue gas returning cylinder (102), a rotating base (4024) is fixedly connected to the first connecting rod (4023), a third rotating ring (4021) is fixedly connected to the sleeve (402), a rotating groove matched with the third rotating ring (4021) is formed in the rotating base (4024), a guide cylinder (701) is fixedly connected to the second connecting rod (7011), and the rack (7) is slidably connected in the guide cylinder (701).
6. The flue gas denitration temperature regulating system based on flue gas recirculation technology of claim 5, characterized in that piston rod (401) is provided with a convex block (4012), sleeve (402) is internally provided with a spiral groove (4025), convex block (4012) is slidably connected in spiral groove (4025), the bottom of smoke return tube (102) is fixedly connected with hinged block (1021), the hinged block (1021) is internally fixedly connected with a sealing ring (1022), and sealing ring (1022) is attached to piston rod (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021992006.9U CN213146604U (en) | 2020-09-14 | 2020-09-14 | Flue gas denitration temperature regulating system based on flue gas recirculation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021992006.9U CN213146604U (en) | 2020-09-14 | 2020-09-14 | Flue gas denitration temperature regulating system based on flue gas recirculation technology |
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| Publication Number | Publication Date |
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| CN213146604U true CN213146604U (en) | 2021-05-07 |
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| CN202021992006.9U Active CN213146604U (en) | 2020-09-14 | 2020-09-14 | Flue gas denitration temperature regulating system based on flue gas recirculation technology |
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| CN (1) | CN213146604U (en) |
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