CN205586849U - Wind send fine coal blender - Google Patents

Abstract

The utility model provides a wind send fine coal blender, including the blender tuber pipe, it sets up one from the tuber pipe maximum outer diameter inclined plane of axial direction of the pipe slope aweather on tuber pipe upper portion to be close to tuber pipe air intake end, be connected with the tube cell on the tuber pipe, the tube cell that falls includes two sections of the inclination difference, the contained angle more than or equal to 60 of fall the tube cell axis and the tuber pipe axis of upper segment, the contained angle less than or equal to 45 of fall the tube cell axis and the tuber pipe axis of hypomere, end connection is at the lower extreme on inclined plane under the tube cell that falls of hypomere, under the inclined plane distance at tip to tuber pipe center be the tuber pipe the biggest internal diameter 0.25 0.32 doubly, the projected length of inclined plane on the tube cell axis that falls for the tuber pipe the biggest internal diameter 0.8 0.9 doubly, the tuber pipe that falls behind the tube cell is the plane that a concave yield was gone, plane through a tilt up behind the plane that the concave yield was gone is connected to blast pipe maximum outer diameter. This device result of use is good.

Description

A kind of wind powder feeding coal blender

Technical field

This utility model relates to a kind of coal, pulverulent fuel mixer, particularly to a kind of wind powder feeding coal blender, belongs 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

The purpose of this utility model is 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 this utility model，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 400-420mm.

nullPositive Advantageous Effects of the present utility model 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 schematic diagram of the present utility model.

Detailed description of the invention

In order to explain enforcement of the present utility model more fully, it is provided that embodiment of the present utility model.These embodiments are only to elaboration of the present utility model, are not intended to scope of the present utility model.

In conjunction with accompanying drawing elaboration further details of to this utility model, 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 this utility model 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 400-420mm, 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 this utility model, 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 embodiment of the present utility model 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 technical spirit of the present utility model, belong to the scope of technical solutions of the utility model, and this utility model is also not only restricted to the embodiment of example in description.

Claims (5)

1. null1. a wind powder feeding coal blender，Including blender airduct，It is characterized in that: 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.
2. 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.
3. 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.
4. 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 °.
5. 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 400-420mm.