CN103029989A - Novel pebble coal feeding device with separation function - Google Patents
Novel pebble coal feeding device with separation function Download PDFInfo
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- CN103029989A CN103029989A CN2012105812641A CN201210581264A CN103029989A CN 103029989 A CN103029989 A CN 103029989A CN 2012105812641 A CN2012105812641 A CN 2012105812641A CN 201210581264 A CN201210581264 A CN 201210581264A CN 103029989 A CN103029989 A CN 103029989A
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- pipeline
- pebble coal
- admission line
- feeding device
- discharging
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Abstract
The invention relates to a material transmission component in a pebble coal gas power transmission system of a heat power plant, in particular to a novel pebble coal feeding device with a separation function. The novel pebble coal feeding device comprises a material collection device (1), a material inlet pipe (2), an air inlet pipeline (3), a valve (4), a separating pipeline (5) and a material transmission pipeline (9), wherein the material collection pipeline (1) is connected to the upper part of the air inlet pipeline (3) through the material inlet pipe (2), the rear end of the air inlet pipeline (3) is connected with the material transmission pipeline (9), and a connecting position of the air inlet pipeline (3) and the material transmission pipeline (9) is provided with the separating device (5) which is downwards arranged. According to the novel pebble coal feeding device disclosed by the invention, a separating method is naturally completed through a gravity force, and the effect is stable; and the separating pipeline (5) is internally provided with two material discharging plates, the material discharging plates can be opened in turns during discharging, thus the influence caused by the airflow entered from the bottom part of the separating pipeline (5) to the system stability during the discharging can be prevented, and the discharging can be simultaneously completed.
Description
Technical field
The present invention relates to a kind of mass transport parts for thermal power plant's stone coal pneumatic transmitting system, especially a kind of pebble coal feeding device.
Background technology
In the widely used coal mill operational process of thermal power plant, can produce a large amount of pebble coals, its main component is large, the difficult spoil that grinds of density in the raw coal, iron pyrite etc., its discharge side from its bottom when coal mill moves is discharged.A large amount of pebble coals of discharging need in time be transported away, otherwise can be in coal mill bulk deposition, the pebble coal of accumulation also can stop up the air channel, causes coal mill fault fortune to stop.
Common stone coal discharge has the modes such as manual emission, hydraulic discharge, mechanical transportation.At present, thermal power plant's coal consumption is very large, and the general variation of raw coal ature of coal, and the foreign material such as the stone in the raw coal, ore increase than before, and the stone coal discharge amount of thereupon bringing also increases greatly.In recent years, more domestic power plant have adopted air-transport system to process the emission problem of pebble coal.Air-transport system is that a kind of air-flow that utilizes is as carrier; mass transport mode with the certain speed transferring bulk cargo; with respect to other mass transport mode; strength is carried has the transport efficiency height; the equipment structure is safeguarded simple; be conducive to realize the advantages such as automation conveying and environmental protection; but because the quality of coal is too poor; there is the larger particle of part particle diameter (mainly be 〉=50mm pebble coal) in the pebble coal that produces; these oarse-grained existence cause the obstruction in the pipeline easily; it is final so that whole pipeline system paralysis has had a strong impact on production efficiency.
Summary of the invention
To the objective of the invention is in order addressing the above problem, to avoid pebble coal stopping up in air-transport system, proposed a kind of being equipped with and separated pipeline to realize the pneumatic transmission feeding device of large particle diameter pebble coal pre-separation.Inevitably can produce a large amount of pebble coals through coal mill, before these bulky grain pebble coals enter main line, be separated, thus the reliability of raising air-transport system.
The pebble coal feeding device of Novel belt separation function of the present invention, comprise material collecting device 1, feed pipe 2, admission line 3, valve 4, separate pipeline 5, conveying pipeline 9, material collecting device 1 is connected to the top of admission line 3 front ends by feed pipe 2, admission line 3 rear ends connect conveying pipeline 9, admission line 3, conveying pipeline 9 connection locations are provided with downward separation pipeline 5, the front end of feed pipe 2 and admission line 3 connection locations to admission line 3 with separate the charging accelerating sections 8 that pipeline 5 connection locations are feeding pipe 3; The diameter of admission line 3, separation pipeline 5, conveying pipeline 9 is d, and the length of charging accelerating sections 8 is 5d, admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2, wherein v be diameter be 50mm pebble coal under the operating mode of valve 4 standard-sized sheets by the speed behind the charging accelerating sections 8, g is acceleration due to gravity.
The present invention comprises that also the first stripper 6, the second stripper 7, the first strippers 6, the second stripper 7 are arranged in the separation pipeline 5.
Conveying pipeline 9 ends are provided with butt flange 10.
Air-flow enters along admission line 3 levels among the present invention, the pebble coal particle by material collecting device 1 in feed pipe 2 enters admission line 3, under the effect of air-flow, the pebble coal particle is by charging accelerating sections 8 and obtain certain kinematic velocity, theoretical by the Dual-Phrase Distribution of Gas olid mechanics, the kinematic velocity of the particle of different-diameter is with variant, granule (diameter is less than 50mm) will obtain larger speed, cut-off is v for particle generation speed under the operating mode of valve 4 standard-sized sheets of 50mm directly, then short grained speed must be greater than or equal to v, the speed of bulky grain (diameter is greater than 50mm) is less than v, the diameter that separates pipeline 5 is identical with admission line 3 diameters, be d, owing to have in the vertical direction certain diff-H h at the admission line 3 that separates pipeline 5 front portions and the conveying pipeline 9 at rear portion, after the pebble coal particle leaves the charging accelerating sections 8 of admission line 3 and enters 5 tops, separator tube road, will do level throw motion, because admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2Wherein g is acceleration due to gravity, diameter will be greater than h greater than the displacement of the pebble coal particle in the vertical direction of 50mm, therefore will all fall into and separate in the pipeline 5, and will be less than h owing to the displacement of in the vertical direction less than the pebble coal particle of 50mm, thereby can enter into conveying pipeline 9 by separating pipeline 5 tops, and then continue to carry backward, finished in the pebble coal particle greater than with automatic separation the less than diameter 50mm particle, separation method of the present invention is finished naturally by gravity, effect stability, and owing within separating pipeline 5, be provided with 2 strippers, open in turn stripper during discharging, the air-flow that pours in from separation pipeline 5 bottoms in the time of can avoiding discharging has been finished discharging simultaneously on the impact of system stability.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the path of motion scheme drawing of different-grain diameter pebble coal particle among the present invention.
Among the figure: material collecting device 1, feed pipe 2, admission line 3, valve 4, separation pipeline 5, the first stripper 6, the second stripper 7, charging accelerating sections 8, conveying pipeline 9, butt flange 10.
The specific embodiment
As shown in Figure 1, the pebble coal feeding device of Novel belt separation function of the present invention, comprise material collecting device 1, feed pipe 2, admission line 3, valve 4, separate pipeline 5, conveying pipeline 9, material collecting device 1 is connected to the top of admission line 3 front ends by feed pipe 2, admission line 3 rear ends connect conveying pipeline 9, admission line 3, conveying pipeline 9 connection locations are provided with downward separation pipeline 5, the front end (dotted line S position among the figure) of feed pipe 2 and admission line 3 connection locations to admission line 3 with separate pipeline 5 connection locations (dotted line E position among the figure) and be the charging accelerating sections 8 of feeding pipe 3; The diameter of admission line 3, separation pipeline 5, conveying pipeline 9 is d, and the length of charging accelerating sections 8 is 5d, admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2, wherein v be diameter be 50mm pebble coal under the operating mode of valve 4 standard-sized sheets by the speed behind the charging accelerating sections 8, g is acceleration due to gravity.
The present invention comprises that also the first stripper 6, the second stripper 7, the first strippers 6, the second stripper 7 are arranged in the separation pipeline 5.
Conveying pipeline 9 ends are provided with butt flange 10.
Using method of the present invention and principle are as follows: flange 10 can directly link to each other with air-transport system, is convenient to transform existing system.Coal mill produces the pebble coal particle and is transported to material collecting device 1 through screw feeder; in feed pipe 2 enters into admission line 3; whole pipeline is in negative pressure; the valve 4 of admission line 3 front ends is opened; the air-flow that sucks from admission line 3 will be so that the pebble coal particle obtains certain kinematic velocity also by behind the charging accelerating sections 8; the length of charging accelerating sections 8 is 5 times of admission line 3 calibers, guarantees to reach a stable numerical value through the speed of pebble coal particle behind the charging accelerating sections 8
Cut-off is being v by the speed behind the charging accelerating sections 8 for the pebble coal of 50mm under the operating mode of valve 4 standard-sized sheets directly, and this speed can adopt the methods acquisitions such as actual measurement or FLUENT software and DEM model coupling calculating, does not repeat them here; According to theory of gas-solid two-phase, the different pebble coal particle of diameter will obtain different speed, the speed v of large-size particles (mainly being the pebble coal particle of particle diameter＞50mm)
Bulky grainLess than v, the speed v of small size particle (mainly being the pebble coal particle of particle diameter＜50mm)
GranuleInevitable greater than v.
The diameter that separates pipeline 5 is identical with admission line 3 diameters, be d, owing to have in the vertical direction certain diff-H h at the admission line 3 that separates pipeline 5 front portions and the conveying pipeline 9 at rear portion, after the pebble coal particle leaves the charging accelerating sections 8 of admission line 3 and enters 5 tops, separator tube road, to do level throw motion, because admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2, wherein g is acceleration due to gravity.
Situation 1: for the pebble coal particle of diameter greater than 50mm, according to h=gd
2/ 2v
2As can be known, at g, d, all in the constant situation, h and the v relation of being inversely proportional to is because v
Bulky grainLess than v, so the displacement of bulky grain in the vertical direction also will greater than h, therefore will all fall into and separate in the pipeline 5.
Situation 2: for the pebble coal particle of diameter less than 50mm, in like manner, because v
GranuleGreater than v, therefore the displacement of granule in the vertical direction will be less than h, thereby can enter into conveying pipeline 9 by separating pipeline 5 tops, and then continue to carry backward, so far finished the above automatic separation that reaches following particle of diameter 50mm in the pebble coal particle, separation method of the present invention is finished naturally by gravity, effect stability, and owing within separating pipeline 5, be provided with 2 strippers, open in turn stripper during discharging, the air-flow that pours in from separation pipeline 5 bottoms in the time of can avoiding discharging has been finished discharging simultaneously on the impact of system stability.
Fig. 2 is the path of motion scheme drawing of the pebble coal particle of different-grain diameter, and A is the bulky grain path curves among the figure, and B is the granule path curves, the particle of different-grain diameter is after entering the separation chamber, bulky grain will fall into and separate pipeline 5, and granule will enter conveying pipeline 9 because speed is larger.
Separate in the pipeline 5 the first stripper 6, the second stripper 7 are installed, to separate pipeline 5 minutes for two parts up and down, when the pebble coal that separates pipeline 5 tops stockpiles certain altitude, the first stripper 6 is opened, pebble coal drops to and separates pipeline 5 bottoms, i.e. for the first time discharging, the first stripper 6 is closed immediately after finishing, and then open separate pipeline 5 bottoms the second stripper 7 to extraneous discharging, the air-flow that has poured in from separation pipeline 5 bottoms when for the first time discharging has been avoided in i.e. for the second time discharging, such operation is on the impact of system stability.
Claims (3)
1. the pebble coal feeding device of a Novel belt separation function, it is characterized in that: comprise material collecting device (1), feed pipe (2), admission line (3), valve (4), separate pipeline (5), conveying pipeline (9), material collecting device (1) is connected to the top of admission line (3) front end by feed pipe (2), admission line (3) rear end connects conveying pipeline (9), admission line (3), conveying pipeline (9) connection location is provided with downward separation pipeline (5), the front end of feed pipe (2) and admission line (3) connection location to admission line (3) with separate the charging accelerating sections (8) that pipeline (5) connection location is feeding pipe (3); The diameter of admission line (3), separation pipeline (5), conveying pipeline (9) is d, and the length of charging accelerating sections (8) is 5d, admission line (3) and conveying pipeline (9) diff-H h=gd
2/ 2v
2, wherein v be diameter be 50mm pebble coal under the operating mode of valve (4) standard-sized sheet by the speed behind the charging accelerating sections (8), g is acceleration due to gravity.
2. the pebble coal feeding device of Novel belt separation function according to claim 1 is characterized in that: also comprise the first stripper (6), the second stripper (7), the first stripper (6), the second stripper (7) are arranged on and separate in the pipeline (5).
3. the pebble coal feeding device of Novel belt separation function according to claim 1, it is characterized in that: conveying pipeline (9) end is provided with butt flange (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581264.1A CN103029989B (en) | 2012-12-28 | 2012-12-28 | Novel pebble coal feeding device with separation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581264.1A CN103029989B (en) | 2012-12-28 | 2012-12-28 | Novel pebble coal feeding device with separation function |
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| Publication Number | Publication Date |
|---|---|
| CN103029989A true CN103029989A (en) | 2013-04-10 |
| CN103029989B CN103029989B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210581264.1A Expired - Fee Related CN103029989B (en) | 2012-12-28 | 2012-12-28 | Novel pebble coal feeding device with separation function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107670983A (en) * | 2017-11-10 | 2018-02-09 | 重庆市贵金象炭黑有限责任公司 | A kind of material separation device and heavier feeds piece-rate system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529170A (en) * | 1975-07-14 | 1977-01-24 | Ishikawajima Harima Heavy Ind Co Ltd | Grading apparatus |
| CN87105301A (en) * | 1986-08-01 | 1988-03-16 | 罗伯特·乔治·斯塔福德 | Separating mixture in wind-tunnel |
| SU1699660A1 (en) * | 1989-12-08 | 1991-12-23 | Челябинский Институт Механизации И Электрификации Сельского Хозяйства | Pneumatic centrifugal separator |
| JPH0985176A (en) * | 1995-09-27 | 1997-03-31 | Ebara Koki Kk | Sorting device |
| CN2529706Y (en) * | 2002-03-07 | 2003-01-08 | 郑毅 | Gravity winnowing appts. for garbage |
| CN2541071Y (en) * | 2002-05-24 | 2003-03-26 | 王新明 | Winnowing separator |
| CN203064809U (en) * | 2012-12-28 | 2013-07-17 | 江苏大学 | Novel pebble coal feeding device with separating function |
-
2012
- 2012-12-28 CN CN201210581264.1A patent/CN103029989B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529170A (en) * | 1975-07-14 | 1977-01-24 | Ishikawajima Harima Heavy Ind Co Ltd | Grading apparatus |
| CN87105301A (en) * | 1986-08-01 | 1988-03-16 | 罗伯特·乔治·斯塔福德 | Separating mixture in wind-tunnel |
| SU1699660A1 (en) * | 1989-12-08 | 1991-12-23 | Челябинский Институт Механизации И Электрификации Сельского Хозяйства | Pneumatic centrifugal separator |
| JPH0985176A (en) * | 1995-09-27 | 1997-03-31 | Ebara Koki Kk | Sorting device |
| CN2529706Y (en) * | 2002-03-07 | 2003-01-08 | 郑毅 | Gravity winnowing appts. for garbage |
| CN2541071Y (en) * | 2002-05-24 | 2003-03-26 | 王新明 | Winnowing separator |
| CN203064809U (en) * | 2012-12-28 | 2013-07-17 | 江苏大学 | Novel pebble coal feeding device with separating function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107670983A (en) * | 2017-11-10 | 2018-02-09 | 重庆市贵金象炭黑有限责任公司 | A kind of material separation device and heavier feeds piece-rate system |
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| CN103029989B (en) | 2015-02-04 |
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