CN105854659A - Air-conveying powdered coal mixer - Google Patents
Air-conveying powdered coal mixer Download PDFInfo
- Publication number
- CN105854659A CN105854659A CN201610215184.2A CN201610215184A CN105854659A CN 105854659 A CN105854659 A CN 105854659A CN 201610215184 A CN201610215184 A CN 201610215184A CN 105854659 A CN105854659 A CN 105854659A
- Authority
- CN
- China
- Prior art keywords
- airduct
- plane
- axis
- powder
- blender
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/315—Injector mixers in conduits or tubes through which the main component flows wherein a difference of pressure at different points of the conduit causes introduction of the additional component into the main component
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/501—Mixing combustion ingredients, e.g. gases, for burners or combustion chambers
Abstract
The invention relates to an air-conveying powdered coal mixer. The air-conveying powdered coal mixer comprises a mixer wind pipe, wherein an oblique plane which inclines from maximum outer diameter of the wind pipe to the axis direction of the wind pipe is arranged close to an air inlet end at the upper part of the wind pipe; a powder falling pipe is connected to the wind pipe and comprises two sections with different dip angles, the included angle between the axis of the upper section of the powder falling pipe and the axis of the wind pipe is more than or equal to 60 degrees, the included angle between the axis of the lower section of the powder falling pipe and the axis of the wind pipe is less than or equal to 45 degrees, the lower end part of the lower section of the powder falling pipe is connected to the lower end of the oblique plane, the distance from the lower end part of the oblique plane to the center of the wind pipe is 0.25-0.32 time of the maximum inner diameter of the wind pipe, and the length of the projection of the oblique plane on the axis of the powder falling pipe is 0.8-0.9 time of the maximum inner diameter of the wind pipe; and the wind pipe behind the powder falling pipe is a sunken plane which is connected to the maximum outer diameter of an air supply pipe through an upward inclined plane. The air-conveying powdered coal mixer has a good use effect.
Description
Technical field
The present invention relates to a kind of coal, pulverulent fuel mixer, particularly to a kind of wind powder feeding coal blender, belong to electric power factory equipment technical field.
Background technology
Coal, pulverulent fuel mixer is used to mixed coal powder and the device of burning required air.The coal, pulverulent fuel mixer of power plant typically uses and arranges horizontal baffle in primary air piping, airduct upper surface arranges concave surface, its mixing mechanism is when First air air-flow is by the reducing of concave surface, air velocity increases, forming negative pressure at reducing, the coal dust fallen from powder sinking tube is pumped into Gas inlet tube under condition of negative pressure.And in actual moving process, have following defect, one is that the vacuum effect of this simple coal, pulverulent fuel mixer structure is inconspicuous, be easily generated that malleation torr powder, lower powder be smooth at pipe content, coal dust deposition is at lower powder mouth, after assembling constant weight, flow under the influence of gravity in blender, it is consequently formed and intermittently carrys out powder so that tube cell can not become homogeneous powder stream, cause boiler operating parameter unstable；Two are, can be usually a straight tube at the lower tube cell of coal, pulverulent fuel mixer, when between powder sinking tube axis and airduct axis, angle (referring to the angle from air intake direction) is big, when being greater than 60 °, owing to the velocity component of the vertical direction of lower powder is excessive and the less coal dust that frequently results in of the velocity component of horizontal direction can not the most rearward be advanced conveying, in the case of between powder sinking tube axis and airduct axis, angle is little, on the one hand the falling power of coal dust is not enough, easily cause blocking, moreover although the vertical velocity component of coal dust in this case diminishes, but horizontal velocity component does not the most increase, so the design of powder sinking tube is closely related with the normal work of blender, on current coal, pulverulent fuel mixer, both can not take into account, cause coal, pulverulent fuel mixer job insecurity.
Summary of the invention
It is an object of the invention to overcome drawbacks described above present in the coal, pulverulent fuel mixer of existing use, it is provided that a kind of wind powder feeding coal blender.
nullFor realizing the purpose of the present invention，Have employed following technical scheme，A kind of wind powder feeding coal blender，Including blender airduct，Near airduct air inlet end, one inclined-plane tilted from airduct maximum outside diameter aweather tube axis direction is set on airduct top，Inclined-plane forms one section of concave segment gradually downward on airduct top，Airduct connects and has powder sinking tube，Described powder sinking tube includes two sections that inclination angle is different，The powder sinking tube axis of epimere and the angle of airduct axis are more than or equal to 60 °，The powder sinking tube axis of hypomere and the angle of airduct axis are less than or equal to 45 °，Seamlessly transit between two sections，The powder sinking tube length of hypomere is 0.1-0.25 times of the powder sinking tube length of epimere，The powder sinking tube bottom of hypomere is connected to the lower end on inclined-plane，0.25-0.32 times that distance is airduct maximum inner diameter of bottom, inclined-plane to airduct center，Inclined-plane projected length on powder sinking tube axis is 0.8-0.9 times of airduct maximum inner diameter，Airduct after powder sinking tube is a plane fallen in，Between the plane and the horizontal line at the place, lower end on inclined-plane that fall in 0.09-0.11 times that distance is airduct maximum inner diameter，It is connected to ajutage maximum outside diameter by an acclivitous plane after the plane fallen in，Further，Dividing plate it is provided with in the airduct of blender，Described dividing plate is made up of upper spacer and lower clapboard，The peak of upper spacer to 0-0.125 times that distance is blender airduct maximum inner diameter of mixer center axis，The peak of upper spacer to 1/15-1/10 times that distance is blender airduct maximum inner diameter of the minimum point of lower clapboard，Described upper spacer and lower clapboard stagger setting on wind direction，The leading section of upper spacer and inclined-plane lower end part are on same vertical line，The leading section of lower clapboard and the distal portion of upper spacer are on same vertical line，The leading section of upper spacer、The leading section of lower clapboard refers both to its end windward；Further, 0.58-0.62 times of a length of blender airduct maximum inner diameter of described upper spacer and lower clapboard, further, the powder sinking tube axis of epimere and the angle of airduct axis greatly 65 °, the powder sinking tube axis of hypomere and the angle of airduct axis are 40 °, further, described airduct maximum inner diameter is 400-420mmm.
nullThe positive Advantageous Effects of the present invention is: this device is through meticulous design，Powder sinking tube is divided into two sections that inclination angle is different，Lower segment length is far smaller than epimere，This design power when coal dust falls is bigger，After coal dust is fallen at angle, kinetic energy is bigger，Under the constraint of angle structure，This bigger kinetic energy is converted into the velocity component that horizontal direction is bigger，Reduce the powder falling velocity component of vertical direction simultaneously，Owing to the velocity attitude of horizontal direction is consistent with distinguished and admirable direction，So this structure ensure that powder falling is the most quickly fed forward，The biggest velocity component also has gain effect to the negative pressure of bottleneck，It is negative pressure through testing internal mixer pressure in this device busy、First air band powder ability strengthens，Without torr powder phenomenon，Coal dust is difficult to deposit plugging，Negative pressure is formed in reducing position，The coal dust fallen from powder sinking tube can be taken away rapidly，Avoid the deposition of coal dust，Steady air current in this device，Mix homogeneously，The concave surface of blender upper surface，With powder sinking tube as boundary，The windward side of concave surface is inclined-plane，The sectional area change making passage is the most smooth so that air-flow change is more stable，Coal dust is after powder sinking tube falls，Mix more uniform with air-flow，Coal dust can be brought in burner hearth by stable air-flow continuously，In guaranteeing burner hearth, coal dust firing is abundant，Stable conditions，And the change of actual internal area smooths in this device pipe，Reduce the circulating resistance in airflow tube，Can effectively reduce the energy consumption being supplied to air-flow.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention.
Detailed description of the invention
In order to explain the enforcement of the present invention more fully, it is provided that the embodiment of the present invention.These embodiments are only the elaboration to the present invention, do not limit the scope of the invention.
In conjunction with accompanying drawing elaboration further details of to the present invention, accompanying drawing is respectively labeled as: 1: airduct；2: the powder sinking tube of upper end；3: the powder sinking tube of hypomere；4: the powder sinking tube axis of upper end；5: the powder sinking tube axis of hypomere；6: inclined-plane；7: the plane fallen in；8: acclivitous plane；9: upper spacer；10: lower clapboard.Before and after the present invention consistent with First air flow path direction.nullAs shown in drawings，A kind of wind powder feeding coal blender，Including blender airduct 1，Near airduct 1 air inlet end, one inclined-plane 2 tilted from airduct maximum outside diameter aweather tube axis direction is set on airduct top，Inclined-plane 2 forms one section of concave segment gradually downward on airduct top，Airduct connects and has powder sinking tube，Described powder sinking tube includes two sections that inclination angle is different，Powder sinking tube 4 axis of epimere and the angle of airduct axis are more than or equal to 60 °，In figure, angle A is powder sinking tube 4 axis angle with airduct axis of epimere，Powder sinking tube 5 axis of hypomere and the angle of airduct axis are less than or equal to 45 °，In figure, angle B is the powder sinking tube axis angle with airduct axis of hypomere，Above-mentioned two angle refers both to the angle in terms of air intake direction，Seamlessly transit between two sections，Powder sinking tube 5 length of hypomere is 0.1-0.25 times of powder sinking tube 4 length of epimere，Powder sinking tube 5 bottom of hypomere is connected to the lower end on inclined-plane 6，0.25-0.32 times that distance is airduct maximum inner diameter of bottom, inclined-plane 6 to airduct center，The inclined-plane 6 projected length on powder sinking tube axis is 0.8-0.9 times of airduct maximum inner diameter，Airduct after powder sinking tube is a plane 7 fallen in，Between the plane 7 and the horizontal line at the place, lower end on inclined-plane 6 that fall in 0.09-0.11 times that distance is airduct maximum inner diameter，It is connected to ajutage maximum outside diameter by an acclivitous plane 8 after the plane 7 fallen in，Dividing plate it is provided with in the airduct of blender，Described dividing plate is made up of upper spacer 8 and lower clapboard 9，The peak of upper spacer 8 to 0-0.125 times that distance is blender airduct maximum inner diameter of mixer center axis，The peak of upper spacer 8 to 1/15-1/10 times that distance is blender airduct maximum inner diameter of the minimum point of lower clapboard 9，Described upper spacer 8 and lower clapboard 9 stagger setting on wind direction，The leading section of upper spacer 8 and inclined-plane 6 lower end part are on same vertical line，The distal portion of the leading section of lower clapboard 9 and upper spacer 8 is on same vertical line，The leading section of upper spacer、The leading section of lower clapboard refers both to its end windward；0.58-0.62 times of a length of blender airduct maximum inner diameter of upper spacer and lower clapboard, more specifically, powder sinking tube 4 axis of epimere and the angle of airduct axis greatly 65 °, powder sinking tube 5 axis of hypomere and the angle of airduct axis are 40 °, airduct maximum inner diameter is 400-420mmm, the internal diameter value of powder sinking tube is at about 1/6th of airduct internal diameter, and according to the internal diameter of airduct, other parameters scope all can draw concrete value range in the interval of above-mentioned restriction.The place that is connected smoothly of two paragraph tube cells in the present invention, the sheet material that portion inner surface can be used to be inlaid with graphite column connects making, both can ensure that wear-resisting, also lubricity, it is possible to preferably realize powder falling.
After describing embodiments of the present invention in detail, one of ordinary skilled in the art is clearly understood that, various change and amendment can carried out under spirit without departing from above-mentioned claim, all any simple modification, equivalent variations and modifications above example made according to the technical spirit of the present invention, belong to the scope of technical solution of the present invention, and the present invention is also not only restricted to the embodiment of example in description.
Claims (5)
1. a wind powder feeding coal blender, including blender airduct, it is characterised in that: arranging an inclined-plane tilted from airduct maximum outside diameter aweather tube axis direction on airduct top near airduct air inlet end, inclined-plane forms one section of concave segment gradually downward on airduct top,
nullAirduct connects and has powder sinking tube，Described powder sinking tube includes two sections that inclination angle is different，The powder sinking tube axis of epimere and the angle of airduct axis are more than or equal to 60 °，The powder sinking tube axis of hypomere and the angle of airduct axis are less than or equal to 45 °，Seamlessly transit between two sections，The powder sinking tube length of hypomere is 0.1-0.25 times of the powder sinking tube length of epimere，The powder sinking tube bottom of hypomere is connected to the lower end on inclined-plane，0.25-0.32 times that distance is airduct maximum inner diameter of bottom, inclined-plane to airduct center，Inclined-plane projected length on powder sinking tube axis is 0.8-0.9 times of airduct maximum inner diameter，Airduct after powder sinking tube is a plane fallen in，Between the plane and the horizontal line at the place, lower end on inclined-plane that fall in 0.09-0.11 times that distance is airduct maximum inner diameter，It is connected to ajutage maximum outside diameter by an acclivitous plane after the plane fallen in.
A kind of wind powder feeding coal blender the most according to claim 1, it is characterized in that: in the airduct of blender, be provided with dividing plate, described dividing plate is made up of upper spacer and lower clapboard, the peak of upper spacer to 0-0.125 times that distance is blender airduct maximum inner diameter of mixer center axis, the peak of upper spacer to 1/15-1/10 times that distance is blender airduct maximum inner diameter of the minimum point of lower clapboard, described upper spacer and lower clapboard stagger setting on wind direction, the leading section of upper spacer and inclined-plane lower end part are on same vertical line, the leading section of lower clapboard and the distal portion of upper spacer are on same vertical line, the leading section of upper spacer, the leading section of lower clapboard refers both to its end windward.
A kind of wind powder feeding coal blender the most according to claim 2, it is characterised in that: 0.58-0.62 times of a length of blender airduct maximum inner diameter of described upper spacer and lower clapboard.
A kind of wind powder feeding coal blender the most according to claim 1, it is characterised in that: the powder sinking tube axis of epimere and the angle of airduct axis greatly 65 °, the powder sinking tube axis of hypomere and the angle of airduct axis are 40 °.
A kind of wind powder feeding coal blender the most according to claim 1, it is characterised in that: described airduct maximum inner diameter is 400-420mmm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215184.2A CN105854659A (en) | 2016-04-08 | 2016-04-08 | Air-conveying powdered coal mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215184.2A CN105854659A (en) | 2016-04-08 | 2016-04-08 | Air-conveying powdered coal mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105854659A true CN105854659A (en) | 2016-08-17 |
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ID=56636253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610215184.2A Pending CN105854659A (en) | 2016-04-08 | 2016-04-08 | Air-conveying powdered coal mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105854659A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420936A (en) * | 2017-06-13 | 2017-12-01 | 吉林大学 | A kind of defeated coal dividing plate and coal, pulverulent fuel mixer and its control method |
| CN109051384A (en) * | 2018-09-21 | 2018-12-21 | 中节环立为（武汉）能源技术有限公司 | A kind of anti-blocking powder dust feeder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09264525A (en) * | 1996-03-28 | 1997-10-07 | Mitsubishi Heavy Ind Ltd | Fine powder coal separator device |
| CN202229214U (en) * | 2011-08-30 | 2012-05-23 | 湖南晟通科技集团有限公司 | Coal dust mixer |
| CN202253713U (en) * | 2011-08-30 | 2012-05-30 | 湖南晟通科技集团有限公司 | Full-negative-pressure pulverized coal mixer |
| CN202253714U (en) * | 2011-08-30 | 2012-05-30 | 湖南晟通科技集团有限公司 | Pulverized coal mixer |
| CN205586849U (en) * | 2016-04-08 | 2016-09-21 | 大唐安阳发电厂 | Wind send fine coal blender |
-
2016
- 2016-04-08 CN CN201610215184.2A patent/CN105854659A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09264525A (en) * | 1996-03-28 | 1997-10-07 | Mitsubishi Heavy Ind Ltd | Fine powder coal separator device |
| CN202229214U (en) * | 2011-08-30 | 2012-05-23 | 湖南晟通科技集团有限公司 | Coal dust mixer |
| CN202253713U (en) * | 2011-08-30 | 2012-05-30 | 湖南晟通科技集团有限公司 | Full-negative-pressure pulverized coal mixer |
| CN202253714U (en) * | 2011-08-30 | 2012-05-30 | 湖南晟通科技集团有限公司 | Pulverized coal mixer |
| CN205586849U (en) * | 2016-04-08 | 2016-09-21 | 大唐安阳发电厂 | Wind send fine coal blender |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420936A (en) * | 2017-06-13 | 2017-12-01 | 吉林大学 | A kind of defeated coal dividing plate and coal, pulverulent fuel mixer and its control method |
| CN107420936B (en) * | 2017-06-13 | 2023-06-06 | 吉林大学 | Coal conveying partition board, coal powder mixer and control method of coal conveying partition board and coal powder mixer |
| CN109051384A (en) * | 2018-09-21 | 2018-12-21 | 中节环立为（武汉）能源技术有限公司 | A kind of anti-blocking powder dust feeder |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |