CN202229214U - Coal dust mixer - Google Patents
Coal dust mixer Download PDFInfo
- Publication number
- CN202229214U CN202229214U CN 201120320794 CN201120320794U CN202229214U CN 202229214 U CN202229214 U CN 202229214U CN 201120320794 CN201120320794 CN 201120320794 CN 201120320794 U CN201120320794 U CN 201120320794U CN 202229214 U CN202229214 U CN 202229214U
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- Prior art keywords
- airduct
- coal
- sinking tube
- concave surface
- powder sinking
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Abstract
The utility model discloses a coal dust mixer, which comprises an air duct and a dust falling pipe. The upper surface of the air duct is provided with a recessed surface. The air duct and the dust falling pipe are connected together on the recessed surface. At least one separator plate is arranged in the air duct. The central axis of the dust falling pipe is at an included angle of 35-55 degrees with respect to the central axis of the air duct. Since the inclination angle of the dust falling pipe is reduced, the speed of coal dusts in the vertical direction is reduced. Therefore, the contact and action time of coal dusts with the primary air is prolonged and the dust-bringing capacity of the primary air is strengthened. The deposition rate of coal dusts is reduced.
Description
Technical field
The present invention relates to a kind of device, particularly a kind of coal, pulverulent fuel mixer to the combustion apparatus fuel supplying.
Background technology
At present, warehouse chamber pulverized coal preparation system in the middle of the boiler of power plant great majority adopt, coal dust are sent into burner hearth burning by a wind airduct through coal, pulverulent fuel mixer, burner through machine supplying powder, powder sinking tube.Coal, pulverulent fuel mixer be used for mixed coal powder with the burning required air device.
In the prior art, the inclination angle of the powder sinking tube of coal, pulverulent fuel mixer is 55-70 °, and the inclination angle is the central axis of powder sinking tube and the angle of airduct central axis, and said angle leans on air intake one side of airduct.The inclination angle of powder sinking tube is relatively large; Under the effect of gravity and general mood stream, coal dust is in the speed of the vertical direction speed much larger than horizontal direction, has only most ofly to be taken away by a wind; There is quite a few coal dust to be easy to be deposited on the bottom of airduct; The band powder ability of a wind is lower, and long-term accumulation makes the airduct blockage phenomenon.
The utility model content
The purpose of the utility model is to overcome above shortcoming, and a kind of band powder ability that strengthens air-flow is provided, and reduces the coal, pulverulent fuel mixer of coal dust deposition.
The technical scheme of the utility model is:
A kind of coal, pulverulent fuel mixer; Comprise airduct, powder sinking tube; The upper surface of said airduct is provided with a concave surface, and powder sinking tube is connected at the concave surface place with airduct, is provided with at least one dividing plate in the said airduct; The angle of said powder sinking tube central axis and said airduct central axis is 35-55 °, and said angle is the angle of air intake one side.
Further, the angle of the central axis of said powder sinking tube and said airduct central axis is 35-53 °.
Further, said powder sinking tube is arranged on its lowest position of said concave surface.
Further, the minimum point of said concave surface to the distance of said airduct median plane be said dust diameter 0.2-0.3 doubly.
The coal, pulverulent fuel mixer that the utility model provides has following advantage:
1, reinforcing band powder ability reduces the coal dust deposition.Through reducing the inclination angle of powder sinking tube, making it angle is 35-55 °, can guarantee that coal dust successfully falls from powder sinking tube; After getting into airduct, coal dust reduces in the speed of vertical direction under the effect of gravity and a general mood stream; Prolonged contacting and action time of wind and coal dust; Strengthened the band powder ability of a wind, made most coal dusts mix the back and get into the burner hearth burning, reduced coal dust deposition probability with a wind.
2, the negative pressure effect is obvious.The upper surface of airduct is provided with a concave surface, and concave surface forms a Lavalle type passage with the pipe internal partition, in reducing place of passage; Flow velocity increases, and pressure reduces, and forms negative pressure state; The minimum point of concave surface to the distance of airduct median plane be dust diameter 0.2-0.3 doubly, the flow area of passage is of moderate size, guaranteeing under the logical prerequisite smoothly of pulverized coal flow; Increased negative pressure in the pipe as much as possible, made coal dust brought into burner hearth by air-flow more easily, and reduced holder powder phenomenon.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment; To do briefly clearly to introduce to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the coal, pulverulent fuel mixer of the utility model embodiment 1;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of the coal, pulverulent fuel mixer of the utility model embodiment 2;
Fig. 4 is the structural representation of the coal, pulverulent fuel mixer of the utility model embodiment 3;
Fig. 5 is the structural representation of the coal, pulverulent fuel mixer of the utility model embodiment 4, embodiment 6;
Fig. 6 is the coal, pulverulent fuel mixer structural representation of the utility model embodiment 5;
Fig. 7 is the coal, pulverulent fuel mixer structural representation of the utility model embodiment 7;
Reference numeral: 1-airduct, 2-powder sinking tube, 3-concave surface, 4-dividing plate, the central axis of 5-powder sinking tube, the inclination angle of α-powder sinking tube.
The specific embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the utility model, rather than whole embodiment.Based on the embodiment of the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
The specific embodiment is following:
Referring to Fig. 1, Fig. 2, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2; The upper surface of airduct is provided with a concave surface 3, and powder sinking tube 2 is connected at concave surface 3 places with airduct 1, and powder sinking tube 2 is arranged on concave surface 3 and facings the wind on the inclined-plane of a side; Be provided with a dividing plate 4 in the airduct 1, dividing plate 4 cooperates with the concave surface 3 of airduct 1 upper surface, makes circulating face of airduct 1 interior formation descending; At ascending passage, in the reducing position of passage, wind speed increases; Pressure reduces, and forms a negative pressure workspace, strengthens the band powder ability of a wind; The inclined angle alpha of powder sinking tube 2=35 °, inclination angle are the central axis 5 of powder sinking tube and the angle of the central axis of airduct 1, and said angle is the angle that leans on air intake one side of airduct.The angle of this inclined angle alpha can guarantee that coal dust successfully falls from powder sinking tube 2; And behind the entering airduct, coal dust reduces in the speed of vertical direction under the effect of gravity and general mood stream; Prolonged contacting and action time of wind and coal dust; Strengthened the band powder ability of a wind, made most coal dusts mix the back and get into the burner hearth burning, reduced coal dust deposition probability with a wind.
The minimum point of concave surface 3 is 0.35 times of airduct caliber to the distance on airduct 1 central axis plane.
Referring to Fig. 2, Fig. 3, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2, and the upper surface of airduct is provided with a concave surface 3; Powder sinking tube 2 is connected at concave surface 3 places with airduct 1, is provided with a dividing plate 4 in the airduct 1, and dividing plate 4 cooperates with the concave surface 3 of airduct 1 upper surface, makes circulating face of airduct 1 interior formation descending; At ascending passage, in the reducing position of passage, wind speed increases; Pressure reduces, and forms a negative pressure workspace, strengthens the band powder ability of a wind; The inclined angle alpha of powder sinking tube 2=48 °, inclination angle are the central axis 5 of powder sinking tube and the angle of the central axis of airduct 1, and said angle is the angle that leans on air intake one side of airduct.The angle of this inclined angle alpha can guarantee that coal dust successfully falls from powder sinking tube 2; And behind the entering airduct, coal dust reduces in the speed of vertical direction under the effect of gravity and general mood stream; Prolonged contacting and action time of wind and coal dust; Strengthened the band powder ability of a wind, made most coal dusts mix the back and get into the burner hearth burning, reduced coal dust deposition probability with a wind.
The minimum point of concave surface 3 is 1/4 of a dust diameter to the distance of airduct 1 median plane.
Referring to Fig. 2, Fig. 4, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2; The upper surface of airduct is provided with a concave surface 3; Powder sinking tube 2 is connected at concave surface 3 places with airduct 1, is provided with two dividing plates 4 in the airduct 1, the inclined angle alpha of powder sinking tube 2=45 °; Strengthen the band powder ability of a wind, reduced coal dust deposition probability.
Two dividing plates 4 are arranged on the central axis plane of airduct 1, and it is suitable with the A/F of powder sinking tube 2 that the spacing of two dividing plates is set to, and the coal dust that is not pulled away on dividing plate top is fallen between the gap of two dividing plates, reduce the accumulation of coal dust on dividing plate; The length of powder sinking tube 2 openings is identical at the width of airduct 1 radial direction with concave surface 3.
Referring to Fig. 2, Fig. 5, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2; The upper surface of airduct is provided with a concave surface 3; Powder sinking tube 2 is connected at concave surface 3 places with airduct 1, is provided with two dividing plates 4 in the airduct 1, the inclined angle alpha of powder sinking tube 2=40 °; Strengthen the band powder ability of a wind, reduced coal dust deposition probability.
It is suitable with the A/F of powder sinking tube 2 that the spacing of two dividing plates is set to, and wherein dividing plate is arranged on the central axis plane of airduct, and another piece dividing plate is arranged on below the central axis plane, all forms the negative pressure workspace at two passages more than the dividing plate.
Referring to Fig. 2, Fig. 6, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2; The upper surface of airduct is provided with a concave surface 3; Powder sinking tube 2 is connected at concave surface 3 places with airduct 1, is provided with three dividing plates 4 in the airduct 1, the inclined angle alpha of powder sinking tube 2=55 °; Strengthen the band powder ability of a wind, reduced coal dust deposition probability.
Along the air motion direction; The spacing of two dividing plates in back is set to suitable with the A/F of powder sinking tube 2; The spacing of preceding two dividing plates is made as 1/2 of powder sinking tube A/F, and middle dividing plate is arranged on more than the central axis plane of airduct, and two dividing plates are arranged on below the central axis plane in addition; And be arranged in the position of concave surface below 3, make at three passages more than the dividing plate and all form the negative pressure workspace.In like manner, the dividing plate in the airduct can corresponding setting be 4,5 etc., and dividing plate quantity increases, and what the spacing of adjacent two dividing plates can be suitable dwindles.
Embodiment 6
Referring to Fig. 2, Fig. 5, on the basis of embodiment 4, coal, pulverulent fuel mixer; Comprise airduct 1, powder sinking tube 2, the upper surface of airduct is provided with a concave surface 3, and powder sinking tube 2 is connected at concave surface 3 places with airduct 1; Be provided with two dividing plates 4 in the airduct 1; The inclined angle alpha of powder sinking tube 2=50 ° have strengthened the band powder ability of a wind, have reduced coal dust deposition probability.
It is suitable with the A/F of powder sinking tube 2 that the spacing of two dividing plates is set to.
Embodiment 7
Referring to Fig. 2, Fig. 7, coal, pulverulent fuel mixer comprises airduct 1, powder sinking tube 2; The upper surface of airduct is provided with a concave surface 3; Powder sinking tube 2 is connected at concave surface 3 places with airduct 1, is provided with two dividing plates 4 in the airduct 1, the inclined angle alpha of powder sinking tube 2=53 °; Strengthen the band powder ability of a wind, reduced coal dust deposition probability.
It is suitable with the A/F of powder sinking tube 2 that the spacing of two dividing plates is set to, and along airflow direction, first dividing plate is located at below airduct 1 median plane, and second dividing plate is located on the airduct center line face.
The coal, pulverulent fuel mixer that the utility model provides goes for mixing of other similar powders and air-flow.
Claims (4)
1. coal, pulverulent fuel mixer; Comprise airduct, powder sinking tube, the upper surface of said airduct is provided with a concave surface, and powder sinking tube is connected at the concave surface place with airduct; Be provided with at least one dividing plate in the said airduct; It is characterized in that the angle of said powder sinking tube central axis and said airduct central axis is 35-55 °, said angle is the angle of air intake one side.
2. coal, pulverulent fuel mixer according to claim 1 is characterized in that, the angle of the central axis of said powder sinking tube and said airduct central axis is 35-53 °.
3. coal, pulverulent fuel mixer according to claim 1 is characterized in that said powder sinking tube is arranged on its lowest position of said concave surface.
4. coal, pulverulent fuel mixer according to claim 1 is characterized in that, the minimum point of said concave surface to the distance of said airduct median plane be said dust diameter 0.2-0.3 doubly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120320794 CN202229214U (en) | 2011-08-30 | 2011-08-30 | Coal dust mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120320794 CN202229214U (en) | 2011-08-30 | 2011-08-30 | Coal dust mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202229214U true CN202229214U (en) | 2012-05-23 |
Family
ID=46079799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120320794 Expired - Fee Related CN202229214U (en) | 2011-08-30 | 2011-08-30 | Coal dust mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202229214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854659A (en) * | 2016-04-08 | 2016-08-17 | 大唐安阳发电厂 | Air-conveying powdered coal 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 |
-
2011
- 2011-08-30 CN CN 201120320794 patent/CN202229214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854659A (en) * | 2016-04-08 | 2016-08-17 | 大唐安阳发电厂 | Air-conveying powdered coal 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20170830 |