CN209706031U - A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning - Google Patents
A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning Download PDFInfo
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- CN209706031U CN209706031U CN201920245897.2U CN201920245897U CN209706031U CN 209706031 U CN209706031 U CN 209706031U CN 201920245897 U CN201920245897 U CN 201920245897U CN 209706031 U CN209706031 U CN 209706031U
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- fluidized bed
- agstone
- circulating fluidized
- bed boiler
- coal dust
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Abstract
The utility model relates to a kind of feeding mechanisms for circulating fluidized bed boiler low nitrogen burning, including being equipped with the tank body of feed inlet and discharge nozzle, being arranged on tank body for stirring the agitating device of coal dust and agstone, agitating device includes the shaft for being rotatably connected on tank body and having multiple paddles and the first motor for drive shaft rotation；Feeding mechanism further include be arranged on discharge nozzle for by after stirring coal dust and agstone send transport device to circulating fluidized bed boiler, transport device includes being fixed on discharge nozzle and delivery tube be connected to discharge nozzle, the helical conveyer axis that is rotatably connected on inside delivery tube and the second motor for driving the rotation of helical conveyer axis.By the setting of agitating device and transport device, one enables the distribution of coal dust and agstone in circulating fluidized bed boiler more evenly, two enable the coal dust efficiently and successfully carry out low nitrogen burning, and three also improve the effect of agstone desulfurization.
Description
Technical field
The utility model relates to the technical fields of combustion apparatus, are used for the low nitrogen of circulating fluidized bed boiler more particularly, to one kind
The feeding mechanism of burning.
Background technique
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution clean-burning technology rapidly developed in recent ten years, mesh
It is preceding to be widely used in China's station boiler.
Such as the patent that notification number is CN106051749B, the patent provides a kind of low nitrogen based on circulating fluidized bed boiler
Burning process, the circulating fluidized bed boiler include the boiler being sequentially connected, cyclone separator, deduster, air-introduced machine, First air
Air feed system, Secondary Air air feed system draw a flue gas recirculation pipe after air-introduced machine, and parallel connection is primary on flue gas recirculation pipe
Wind air feed system, Secondary Air air feed system, Cyclone outlet set secondary furnace, the low nitrogen based on the circulating fluidized bed boiler
Burning process, comprising the following steps: coal dust enters boiler under First air effect, and flue gas recirculation air quantity accounts for once in First air
The 8-10% of wind total blast volume, First air account for the 40-45% of total blast volume；Secondary Air is passed through in boiler by Secondary Air air feed system,
Flue gas recirculation air quantity accounts for the 12-14% of Secondary Air total blast volume in Secondary Air；Thinner flying dust enters secondary furnace；In secondary furnace
It is passed through burnout degree.
Above-mentioned technology by separator outlet be arranged secondary furnace, partial fume is mixed into First air and Secondary Air,
Thereby reduce the generation of NOx.Traditional circulating fluidized bed boiler is in order to reduce the discharge of SO2, and operator is toward recirculating fluidized bed
Agstone can be also added in boiler while addition coal dust, and traditional addition coal dust and agstone mode is that operator will
In the addition boiler that coal dust and agstone one shovel, the coal dust and agstone distribution after this method addition are very uneven
Even, not only resulting in coal dust efficiently can not successfully carry out low nitrogen burning, while reduce the effect of agstone desulfurization.
Utility model content
The purpose of the utility model is to provide a kind of feeding mechanisms for circulating fluidized bed boiler low nitrogen burning, can make coal
Powder and agstone are evenly distributed in circulating fluidized bed boiler, and then allow coal dust efficiently and successfully carry out low nitrogen burning, together
The effect of Shi Tigao agstone desulfurization.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning, the tank including being equipped with feed inlet and discharge nozzle
Body is arranged on tank body for stirring the agitating device of coal dust and agstone, and agitating device includes being rotatably connected on tank body
And have the shaft of multiple paddles and the first motor for drive shaft rotation；Feeding mechanism further includes that setting is discharging
For sending the coal dust after stirring and agstone to the transport device to circulating fluidized bed boiler, transport device on pipe
Including the delivery tube for being fixed on discharge nozzle and being connected to discharge nozzle, the helical conveyer axis being rotatably connected on inside delivery tube and
The second motor for driving helical conveyer axis to rotate.
By using above-mentioned technical proposal, coal dust and agstone are poured into tank interior by operator from feed inlet,
Then restart first motor and carry out drive shaft and rotate, paddle rotates and with shaft to coal dust and agstone
It is stirred, and then coal dust and agstone is enable to be uniformly mixed.Subsequent operator restarts the second motor to drive spiral to transport
Defeated axis rotates, and the coal dust and agstone after being stirred will be eventually delivered to recycle with the rotation of helical conveyer axis
Inside fluidized-bed combustion boiler, wherein further progress is mixed under the rotary transport of helical conveyer axis for coal dust, is further mentioned
The high uniformity of coal dust and agstone mixing, finally enables the distribution of coal dust and agstone in circulating fluidized bed boiler
More evenly, so that coal dust efficiently and is successfully carried out low nitrogen burning, while also improving the effect of agstone desulfurization.
The utility model is further arranged to: two breaker rolls being parallel to each other, institute are rotatably connected in the discharge nozzle
State the driving mechanism that discharge nozzle is equipped with two breaker rolls synchronizations of driving and opposite direction rotating.
By using above-mentioned technical proposal, driving mechanism drives two breaker rolls synchronous and rotates in opposite directions, and to warp
The coal dust and agstone crossed at discharge nozzle are stirred and are crushed, and one occurs to reduce coal dust and agstone in discharge nozzle
The probability of blocking keeps the transport of coal dust and agstone more smoothly efficient, and two can also be to the coal dust and agstone of agglomeration
It is effectively crushed, reduces the solid particle of coal dust and agstone, three make coal dust and agstone ciculation fluidized
Distribution in bed boiler more evenly can enable coal dust efficiently and successfully to carry out low nitrogen burning, improve agstone desulfurization
Effect.
The utility model is further arranged to: driving mechanism includes fixing first be set on two breaker rolls respectively to pass
Driving wheel and the second driving wheel, the first driving wheel and the intermeshing of the second driving wheel, driving mechanism further include being arranged on discharge nozzle
Third motor for driving the first driving wheel to rotate.
By using above-mentioned technical proposal, the first driving wheel is driven to rotate after third electric motor starting, in the first driving wheel and
Under the linkage effect of second driving wheel, two breaker rolls in discharge nozzle do synchronous and opposite direction rotating, and two breaker rolls can be right
It is stirred and is crushed by the coal dust and agstone of discharge nozzle, principle is simple and easy to operate.
The utility model is further arranged to: the paddle is inclined to set with respect to the central axis of shaft.
By using above-mentioned technical proposal, the paddle being obliquely installed can reduce paddle in stirring coal dust and agstone
When the resistance that is subject to, not only make the mixing of coal dust and agstone more smoothly efficiently, while also helping reduction first
The suffered load of motor, i.e., played a degree of protective effect to first motor.
The utility model is further arranged to: perforation offers several and wears for coal dust and agstone on the paddle
The through-hole crossed.
By using above-mentioned technical proposal, paddle during being stirred to coal dust and agstone, part
Coal dust and agstone can be passed through from through-hole, reduce what paddle was subject to when stirring coal dust and agstone to a certain extent
It is more smoothly efficient not only to make the mixing of coal dust and agstone, while also helping and reducing suffered by first motor for resistance
Load, i.e., played a degree of protective effect to first motor.
The utility model is further arranged to: the delivery tube is connected with far from discharge nozzle one end by coal dust and agstone
The air blower being blown into inside circulating fluidized bed boiler.
By using above-mentioned technical proposal, coal dust and agstone can be blown into inside circulating fluidized bed boiler by air blower,
So that coal dust and agstone inside circulating fluidized bed boiler is distributed more uniform, keep coal dust more efficient and successfully carries out low
Nitrogen burning, while also improving the effect of agstone desulfurization.
The utility model is further arranged to: upper end is equipped on the feed inlet in the feed hopper of flaring setting.
By using above-mentioned technical proposal, feed hopper plays the role of collection guiding to coal dust and agstone, can be with
Enter coal dust and agstone more accurately in feed inlet, the feed operation of worker is not only facilitated, when also reducing charging
Coal dust and agstone drop out the probability of feed inlet, substantially increase the efficiency of addition fuel.
The utility model is further arranged to: the tank body inner bottom wall is in tilt down setting towards discharge nozzle.
By using above-mentioned technical proposal, the intracorporal coal dust of tank and agstone is allow to fall into discharge nozzle at the first time
It is interior, reduce coal dust and agstone in the intracorporal residual of tank, improves the conevying efficiency of coal dust and agstone.
In conclusion the advantageous effects of the utility model are as follows:
1. the setting of agitating device, transport device and air blower makes coal dust and agstone in circulating fluidized bed boiler
Be more evenly distributed, so that coal dust efficiently and is successfully carried out low nitrogen burning, while also improving agstone desulfurization
Effect；
2. the setting of breaker roll and driving mechanism improves the conevying efficiency of coal dust and agstone, while can also be to coal
Powder and agstone are effectively crushed, and the solid particle of coal dust and agstone is reduced, and coal dust and agstone is allowed to exist
Distribution in circulating fluidized bed boiler can be more evenly；
3. tilt the setting of paddle and through-hole, being stirred more smoothly efficiently for coal dust and agstone can be made.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the broken section structural schematic diagram of the utility model.
In figure, 1, feed inlet；2, tank body；3, feed hopper；4, agitating device；41, shaft；42, paddle；43, the first electricity
Machine；5, transport device；51, delivery tube；52, helical conveyer axis；53, the second motor；6, through-hole；7, breaker roll；8, driving mechanism；
81, the first driving wheel；82, the second driving wheel；83, third motor；9, air blower；10, discharge nozzle.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Figures 1 and 2, a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning, including offer charging
The tank body 2 of mouth 1 and discharge nozzle 10,2 lower end of tank body are integrally in the round table-like of aperture reduction, and one is welded on feed inlet 1 is in
Horn-like feed hopper 3,3 top aperture of feed hopper are greater than lower part aperture；Feeding mechanism further includes that setting is used for inside tank body 2
The agitating device 4 that be stirred to coal dust and agstone and 10 lower end of discharge nozzle is set to for will be by the coal dust of stirring
The transport device 5 being delivered to agstone inside circulating fluidized bed boiler.Operator is by coal dust and agstone from feed inlet 1
Place is poured into tank body 2, and coal dust and agstone is mixed in subsequent start-up agitating device 4, after being stirred
Coal dust and agstone transport using transport device 5 to the inside of circulating fluidized bed boiler.
Referring to Fig. 2, agitating device 4 include be rotatably connected on shaft 41 tank body 2 inside, be welded in shaft 41 and with turn
Axis 41 has multiple paddles 42 of certain tilt angle and is mounted on first of 2 upper end of tank body for the rotation of drive shaft 41
Motor 43, first motor 43 are connect by electric wire (not shown) with power supply (not shown).After first motor 43 starts
Shaft 41 can be driven to rotate, paddle 42 will rotate with shaft 41 and stir coal dust and agstone
It mixes, and then is uniformly mixed coal dust and agstone.
Perforation offers the through-hole 6 passed through for part coal dust and agstone on paddle 42, and paddle 42 is in stirring coal
When powder and agstone, the coal dust and agstone of part pass through the through-hole 6 on paddle 42, reduce electric in whipping process
The load that machine is received can play a degree of protective effect to motor.
Transport device 5 include be welded in 2 lower end of tank body and with the delivery tube 51 being connected to inside tank body 2, be rotatably connected on fortune
Helical conveyer axis 52 inside defeated pipe 51 and be mounted on 51 one end of delivery tube for driving that helical conveyer axis 52 rotates the
Two motors 53, the second motor 53 are equally connect by electric wire (not shown) with same power supply (not shown), delivery tube
51 one end far from the second motor 53 extend to inside circulating fluidized bed boiler.Helical conveyer axis is driven after the starting of second motor 53
52 rotate, and the coal dust and agstone by stirring will be transported to recirculating fluidized bed pot with the rotation of helical conveyer axis 52
Furnace interior.
It is rotatably connected to two parallel breaker rolls 7 in discharge nozzle 10, is also equipped on discharge nozzle 10 for synchronous driving
Two breaker rolls 7 are the driving mechanism 8(such as Fig. 1 rotated towards each other), driving mechanism 8(such as Fig. 1) it is set to including fixing sleeve respectively
The first driving wheel 81 and the second driving wheel 82 on two breaker rolls 7, the first driving wheel 81 and the intermeshing of the second driving wheel 82,
Driving mechanism 8(such as Fig. 1) it further include the third motor 83 being mounted on discharge nozzle 10 for driving the first driving wheel 81 to rotate, the
Three motors 83 are connect by electric wire (not shown) with power supply (not shown).Third motor 83 drives first to pass after starting
Opposite direction rotating occurs for the generation opposite direction rotating synchronous with the second driving wheel 82 of driving wheel 81, i.e. two breaker rolls 7 and to coal dust for synchronous
It is stirred and is crushed with agstone, one keeps the blanking of coal dust and agstone more smooth, and two come can also be to tying in tank body 2
The coal dust and agstone of block are crushed.
Delivery tube 51 is equipped with air blower 9 far from one end of the second motor 53, and 9 both ends of air blower delivery tube 51 and are followed respectively
Connection inside circulation fluidized bed boiler, air blower 9 are equally connected by electric wire (not shown) and same power supply (not shown)
It connects.I.e. class blows coal dust and agstone to circulating fluidized bed boiler after air blower 9 starts, and makes coal dust and agstone
It can more uniformly be distributed to circulating fluidized bed boiler.
The implementation principle of the present embodiment are as follows: operator pours into coal dust and agstone in tank body 2 from feed inlet 1, with
After restart first motor 43 shaft 41 driven to rotate, paddle 42 will rotate with shaft 41 and to coal dust and
Agstone is stirred, and then is uniformly mixed coal dust and agstone.Coal dust and agstone by stirring pass through two
Root breaker roll 7 it is broken after, then be finally equably blown in circulating fluidized bed boiler by helical conveyer axis 52 and air blower 9
Portion.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning, it is characterised in that: including be equipped with feed inlet (1) and
The agitating device (4) for being used for stirring coal dust and agstone, stirring dress is arranged on tank body (2) in the tank body (2) of discharge nozzle (10)
Setting (4) includes being rotatably connected on tank body (2) and having the shaft (41) of multiple paddles (42) and for drive shaft
(41) first motor (43) rotated；Feeding mechanism further includes setting in the coal dust being used for after stirring on discharge nozzle (10)
The transport device (5) to circulating fluidized bed boiler is sent with agstone, transport device (5) includes being fixed on discharge nozzle (10)
The upper and delivery tube (51) be connected to discharge nozzle (10), the helical conveyer axis (52) that is rotatably connected on inside delivery tube (51) and
The second motor (53) for driving helical conveyer axis (52) to rotate.
2. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 1, it is characterised in that:
Two breaker rolls being parallel to each other (7) are rotatably connected in the discharge nozzle (10), the discharge nozzle (10) is equipped with driving two
Root breaker roll (7) synchronizes and the driving mechanism (8) of opposite direction rotating.
3. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 2, it is characterised in that:
Driving mechanism (8) includes fixing the first driving wheel (81) and the second driving wheel (82) being set on two breaker rolls (7) respectively,
First driving wheel (81) and the second driving wheel (82) intermeshing, driving mechanism (8) further include that setting is used on discharge nozzle (10)
In the third motor (83) of driving the first driving wheel (81) rotation.
4. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 1, it is characterised in that:
The paddle (42) is inclined to set with respect to the central axis of shaft (41).
5. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 4, it is characterised in that:
Perforation offers several through-holes (6) passed through for coal dust and agstone on the paddle (42).
6. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 1, it is characterised in that:
The delivery tube (51) is connected with far from discharge nozzle (10) one end and coal dust and agstone is blown into inside circulating fluidized bed boiler
Air blower (9).
7. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 1, it is characterised in that:
Upper end is installed in the feed hopper (3) of flaring setting on the feed inlet (1).
8. a kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning according to claim 1, it is characterised in that:
Tank body (2) inner bottom wall is in tilt down setting towards discharge nozzle (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245897.2U CN209706031U (en) | 2019-02-26 | 2019-02-26 | A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245897.2U CN209706031U (en) | 2019-02-26 | 2019-02-26 | A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209706031U true CN209706031U (en) | 2019-11-29 |
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ID=68644261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920245897.2U Active CN209706031U (en) | 2019-02-26 | 2019-02-26 | A kind of feeding mechanism for circulating fluidized bed boiler low nitrogen burning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209706031U (en) |
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2019
- 2019-02-26 CN CN201920245897.2U patent/CN209706031U/en active Active
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