CN109051384A - A kind of anti-blocking powder dust feeder - Google Patents
A kind of anti-blocking powder dust feeder Download PDFInfo
- Publication number
- CN109051384A CN109051384A CN201811108355.7A CN201811108355A CN109051384A CN 109051384 A CN109051384 A CN 109051384A CN 201811108355 A CN201811108355 A CN 201811108355A CN 109051384 A CN109051384 A CN 109051384A
- Authority
- CN
- China
- Prior art keywords
- coal
- section
- air
- dust feeder
- powder dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 68
- 239000000428 dust Substances 0.000 title claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 89
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 26
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000005054 agglomeration Methods 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
- B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses a kind of anti-blocking powder dust feeders, are related to a kind of pulverized coal conveying device.The device includes pulverized coal bin, coal spout and air and powder mixer, further includes jet pipe, and the jet pipe is penetrated through to the coal spout, for conveying jet stream wind to the air and powder mixer direction.The present invention provides a kind of anti-blocking powder dust feeder, by the setting of jet stream air hose, can be introduced from outside into jet stream wind, increase the mobility of coal dust in coal spout, avoids coal dust agglomeration blocking coal spout.
Description
Technical field
The present invention relates to a kind of pulverized coal conveying device, in particular to a kind of anti-blocking powder dust feeder.
Background technique
In coal and biomass combustion boiler and kiln, powder feed system is a very important system of combustion system,
It plays an important role to safe and stable, economic, the environmentally friendly operation of boiler and kiln.Carry powder conveying in powder feed system
Function, guarantee the stabilization of fuel needed for burning, continuous, safety supply.But many times since powder cabin, powder sinking tube and wind powder are mixed
The unreasonable feed blocking that results in of clutch structure design is unable to come down in powder sinking tube, prevent powder feeding is influenced from being carried out continuously
Boiler safety, stable operation.
The occurrence of such, for boiler it is safe, economical, environmentally friendly operation be it is unfavorable, also to current boiler ring
It protects control and causes certain puzzlement, therefore on the basis of not influencing the safe, economic of boiler, operation, need a kind of solution
Reliable, safe, a kind of method that continuously supplies of powder feed system.
Summary of the invention
The present invention provides a kind of anti-blocking powder dust feeder, can solve dust feeder in the prior art and there is easy block up
The poor problem of powder, reliability.
A kind of anti-blocking powder dust feeder, including pulverized coal bin, coal spout and air and powder mixer, further include jet pipe, described to penetrate
Flow tube is penetrated through to the coal spout, for conveying jet stream wind to the air and powder mixer direction.
More preferably, the end that the coal spout connects the air and powder mixer has into coal section, it is described enter coal section towards giving
Wind direction tilts in air hose, the jet pipe vertically through to it is described enter coal section.
More preferably, the jet pipe with it is described enter coal section breakthrough point away from being at a distance from the air and powder mixer center line
500~1000mm.
More preferably, the diameter of the jet pipe is the 1/4 of the diameter of the coal spout, and the jet pipe is 2~3, position
In the leeward side of the coal spout.
More preferably, the pulverized coal bin includes at least two coal breakage buckets, and the inclination angle of the coal breakage bucket is 60~75 °, adjacent
There is deflector between two coal breakage buckets, offer several deflector holes being equidistantly staggered in arrangement on the deflector, it is described to lead
The height of flowing plate is the 1/4~1/3 of coal bunker height.
More preferably, the air and powder mixer includes the entrance being sequentially arranged along wind direction, compression section, aditus laryngis section, expands
Mouthful section and outlet section, it is described enter coal section penetrate through to the aditus laryngis section, the internal diameter of the aditus laryngis section is less than the internal diameter of the flared section.
More preferably, the aditus laryngis section and it is described enter coal section junction have pressure aerofoil, the pressure aerofoil is along described distinguished and admirable
Direction is extended.
More preferably, there is wearing layer on the pressure aerofoil.
More preferably, the wearing layer is to be detachably connected with the pressure aerofoil, and the wearing layer is fixed by dormant bolt
On the pressure aerofoil.
More preferably, it is described enter coal section and the aditus laryngis section junction be arc transition.
The present invention, which provides a kind of anti-blocking powder dust feeder, can be introduced from outside into jet stream wind by the setting of jet stream air hose,
The mobility for increasing coal dust in coal spout avoids coal dust agglomeration blocking coal spout.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of anti-blocking powder dust feeder provided by the invention；
Fig. 2 is the structural schematic diagram of pulverized coal bin in Fig. 1；
Fig. 3 is the structural schematic diagram of deflector in Fig. 2；
Fig. 4 is the structural schematic diagram of air and powder mixer in Fig. 1；
Fig. 5 is partial enlarged view at A in Fig. 4；
Fig. 6 is partial enlarged view at B in Fig. 1.
Description of symbols:
10, pulverized coal bin, 101, coal breakage bucket, 102, deflector, 1021, deflector hole, 11, feeder, 12, coal spout, 121,
Enter coal section, 122, pressure aerofoil, 123, wearing layer, 20, coal mixer, 21, air supply tube, 22, air and powder mixer, 221, entrance,
222, compression section, 223, aditus laryngis section, 224, flared section, 225, outlet section, 23, powder feeding pipes, 31, jet pipe, 32, control valve.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
As shown in Figures 1 to 6, a kind of anti-blocking powder dust feeder provided in an embodiment of the present invention, including pulverized coal bin 10, coal breakage
The upper end perforation of pipe 12 and air and powder mixer 22, coal spout 12 is connected to pulverized coal bin 10, feeder 11 is provided with, in order to increase
The fluency of coal powder further includes jet pipe 31, and control valve 32 is provided on jet pipe, and the perforation of jet pipe 31 is fallen to described
In coal pipe 12, for conveying jet stream wind to 22 direction of air and powder mixer, jet stream wind enters from jet pipe 31, is blown into coal spout
In 12, it is blown into air and powder mixer 22 along coal spout 12, coal dust relies on gravity fall under normal circumstances, but works as coal dust humidity
Greatly, when fineness is inadequate, coal dust is easy agglomeration, frictional force increases so as to cause blocking, and being blown into for jet stream wind can be to coal
Powder increases external force, and the force direction of this external force is identical with gravity direction, can increase the mobility of coal dust, and it is general to reduce coal dust blocking
Rate improves reliability.
Since air supply tube 21 and coal spout 12 are generally arranged vertically, when the coal body in coal spout 12 falls vertically, it is easy
The pressure as caused by air-flow transverse cuts makes coal dust rest on coal outlet, so that it is unsmooth to cause to fall, therefore in the present invention, institute
Stating the end that coal spout 12 connects the air and powder mixer 22 has into coal section 121, it is described enter coal section 121 towards in air supply tube 21
Wind direction inclination, the jet pipe 31 vertically through to it is described enter coal section 121, coal dust can be made by entering coal section 121 and being obliquely installed
It is fallen into along airflow direction, the air-flow in jet pipe 31 tilts the air-flow being incorporated in air supply tube 21, in not influencing air supply tube 21
In the case where air-flow, air-flow in air supply tube 21 can be overcome to be formed by pressure difference to coal section 121 is entered, allow coal dust smoothly into
Enter air and powder mixer 22.
Specifically, the jet pipe 31 with it is described enter coal section 121 breakthrough point away from 22 center line of air and powder mixer
Distance is 500~1000mm.
Specifically, the diameter of the jet pipe 31 is the 1/4 of the diameter of the coal spout 12, and the jet pipe 31 is 2~3
Root, positioned at the leeward side of the coal spout 12.
Since the flowing of the powder in pulverized coal bin 10 is the pulverized coal bin 10 during flowing as caused by the gravity of powder
The flowing velocity at center if each point of storehouse can not achieve isolation and balance in the position close to blanking port, then can around being higher than
The mobility of the blanking port powder in centre is caused to be higher than periphery, it is obstructed so as to cause Flow of Goods and Materials in the material-falling hopper of periphery
Freely, in order to make coal dust uniformly fall into pulverized coal bin 10, the pulverized coal bin 10 includes at least two coal breakage buckets 101, the coal breakage bucket 101
Inclination angle be 60~75 °, there is deflector 102, if offering on the deflector 102 between two adjacent coal breakage buckets 101
The dry deflector hole 1021 being equidistantly staggered in arrangement, the height of the deflector 102 are the 1/4~1/3 of coal bunker height, deflector
102 not only play the role of reinforcing the effect of powder cabin rigidity, and play balanced each 101 powder amount of coal breakage bucket, guarantee each powder
The coal dust in storehouse uniformity in last blanking.The thickness of deflector 102 is consistent with powder cabin thickness of shell, deflector 102
Setting to feeding when coal dust play the distribution at an initial stage, opening up for deflector hole 1021 can be such that the pressure of each coal bunker protects
Equilibrium is held, after coal dust falls into powder cabin, is evenly distributed to each powder cabin.
For the entrance air and powder mixer 22 for keeping coal dust more smooth, the air and powder mixer 22 includes along distinguished and admirable side
To entrance 221, compression section 222, aditus laryngis section 223, flared section 224 and the outlet section 225 being sequentially arranged, it is described enter coal section 121
To the aditus laryngis section 223, the internal diameter of the aditus laryngis section 223 is less than the internal diameter of the flared section 224 for perforation.Bernoulli principle refers to
Out, in air-flow, if speed is small, pressure is with regard to big, if speed is big, for pressure with regard to small, air-flow is entering the pressure of air and powder mixer 22
After contracting section 222, the speed of air-flow is improved, and reaches maximum in 223 speed of aditus laryngis section, the flared section 224 after most due to
Caliber becomes larger, and speed decline then forms low-pressure area in aditus laryngis section 223, makes coal dust after falling into aditus laryngis section 223 due to the work of negative pressure
With being inhaled into air and powder mixer 22, it is entrained by the flow of air.Negative pressure is produced in throat location, so that adsorbing coal dust enters wind powder
Mixer 22.The aditus laryngis section 223 of traditional air and powder mixer 22 is identical as the diameter of flared section 224, and air-flow is easy to scurry into coal breakage
In pipe 12, prevent coal dust from free-falling, i.e., the power that air-flow generates has been greater than the gravity of coal dust whereabouts, and coal dust is unable to come down.Aditus laryngis
Section 223 is too long, and the foundation of negative pressuren zone easily cannot stablize to be formed because of the variation of load, and 224 channel of flared section is straight in the present invention
Diameter be greater than 223 diameter of aditus laryngis section, make herein wind speed reduce pressure become larger, be conducive to aspirate coal dust.
Air-flow, which is scurried into coal spout 12, in order to prevent has withstood coal dust whereabouts, guarantees that stablizing for negative pressure is established at aditus laryngis, institute
State aditus laryngis section 223 and it is described enter coal section 121 junction there is pressure aerofoil 122, the pressure aerofoil 122 prolongs along the wind direction
Stretch setting.
Due to percussive pressure aerofoil 122 when coal dust falls, coal dust rubs with pressure aerofoil 122 for a long time, makes to press 122 service life of aerofoil drop
It is low, therefore setting has wearing layer 123 on the pressure aerofoil 122, can extend the service life of pressure aerofoil 122.
In order to facilitate replacement wearing layer 123, the wearing layer 123 is to be detachably connected with the pressure aerofoil 122, described resistance to
Mill layer 123 is fixed on the pressure aerofoil 122 by dormant bolt.
In order to keep air-flow more smooth, it is described enter coal section 121 and the aditus laryngis section 223 junction be arc transition.
Disclosed above is only several specific embodiments of the invention, and still, the embodiment of the present invention is not limited to this, is appointed
What what those skilled in the art can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of anti-blocking powder dust feeder, including pulverized coal bin, coal spout and air and powder mixer, it is characterised in that: further include jet stream
Pipe, the jet pipe are penetrated through to the coal spout, for conveying jet stream wind to the air and powder mixer direction.
2. a kind of anti-blocking powder dust feeder as described in claim 1, it is characterised in that: it is mixed that the coal spout connects the wind powder
The end of clutch has into coal section, it is described enter coal section tilted towards wind direction in air supply tube, the jet pipe is vertically through extremely
It is described enter coal section.
3. a kind of anti-blocking powder dust feeder as claimed in claim 2, it is characterised in that: the jet pipe and it is described enter coal section
Distance of the breakthrough point away from the air and powder mixer center line is 500~1000mm.
4. a kind of anti-blocking powder dust feeder as claimed in claim 2, it is characterised in that: the diameter of the jet pipe is described falls
The 1/4 of the diameter of coal pipe, the jet pipe is 2~3, positioned at the leeward side of the coal spout.
5. a kind of anti-blocking powder dust feeder as described in claim 1, it is characterised in that: the pulverized coal bin is fallen including at least two
Coal scuttle, the inclination angle of the coal breakage bucket are 60~75 °, have deflector between two adjacent coal breakage buckets, open on the deflector
Equipped with several deflector holes being equidistantly staggered in arrangement, the height of the deflector is the 1/4~1/3 of coal bunker height.
6. a kind of anti-blocking powder dust feeder as described in claim 1, it is characterised in that: the air and powder mixer includes along distinguished and admirable
Entrance, compression section, aditus laryngis section, flared section and the outlet section that direction is sequentially arranged, it is described enter coal section penetrate through to the aditus laryngis section,
The internal diameter of the aditus laryngis section is less than the internal diameter of the flared section.
7. a kind of anti-blocking powder dust feeder as claimed in claim 6, it is characterised in that: the aditus laryngis section and it is described enter coal section
Junction has pressure aerofoil, and the pressure aerofoil is extended along the wind direction.
8. a kind of anti-blocking powder dust feeder as claimed in claim 7, it is characterised in that: have wearing layer on the pressure aerofoil.
9. a kind of anti-blocking powder dust feeder as claimed in claim 8, it is characterised in that: the wearing layer is with the pressure aerofoil
It is detachably connected, the wearing layer is fixed on the pressure aerofoil by dormant bolt.
10. a kind of anti-blocking powder dust feeder as described in claim 6-9 any one, it is characterised in that: it is described enter coal section with
The junction of the aditus laryngis section is arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811108355.7A CN109051384A (en) | 2018-09-21 | 2018-09-21 | A kind of anti-blocking powder dust feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811108355.7A CN109051384A (en) | 2018-09-21 | 2018-09-21 | A kind of anti-blocking powder dust feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109051384A true CN109051384A (en) | 2018-12-21 |
Family
ID=64762432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811108355.7A Pending CN109051384A (en) | 2018-09-21 | 2018-09-21 | A kind of anti-blocking powder dust feeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109051384A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551253A (en) * | 2021-06-19 | 2021-10-26 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Based on wisdom power plant construction wind powder governing system |
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2018
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| CN201027065Y (en) * | 2007-03-15 | 2008-02-27 | 东莞市永强汽车制造有限公司 | Tank body of semitrailer for powder and grain materials transport |
| CN201149249Y (en) * | 2007-12-30 | 2008-11-12 | 彭永康 | Coal breaking apparatus for circulating fluid bed boiler |
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| CN113551253A (en) * | 2021-06-19 | 2021-10-26 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Based on wisdom power plant construction wind powder governing system |
| CN113551253B (en) * | 2021-06-19 | 2023-02-28 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Based on wisdom power plant construction wind powder governing system |
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