CN103029989B - Novel pebble coal feeding device with separation function - Google Patents
Novel pebble coal feeding device with separation function Download PDFInfo
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- CN103029989B CN103029989B CN201210581264.1A CN201210581264A CN103029989B CN 103029989 B CN103029989 B CN 103029989B CN 201210581264 A CN201210581264 A CN 201210581264A CN 103029989 B CN103029989 B CN 103029989B
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- pipeline
- pebble coal
- admission line
- separate lines
- feeding device
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- Air Transport Of Granular Materials (AREA)
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 for the mass transport parts in 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 the spoil of comparatively large, the difficult mill of raw coal Midst density, iron pyrite etc., it when coal mill runs from it bottom discharge side discharge.Discharge a large amount of pebble coals need to be transported away in time, otherwise can in coal mill bulk deposition, the pebble coal of accumulation also can block air channel, cause coal mill fault transport 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 raw coal ature of coal is generally deteriorated, and the foreign material such as the stone in raw coal, ore increase than before, and the stone coal discharge amount thereupon brought also increases greatly.In recent years, more domestic power plant have employed air-transport system to process the emission problem of pebble coal.Air-transport system is that one utilizes air-flow as carrier; in the mass transport mode of certain speed transferring bulk cargo; relative to other mass transport mode; it is high that Geldart-D particle has transport efficiency; equipment structure is safeguarded simple; be conducive to realizing the advantage such as Automatic Conveying and environmental protection; but because the quality of coal is too poor; the larger particle of part particle diameter (pebble coal of mainly >=50mm) is there is in the pebble coal produced; these oarse-grained existence easily cause the blocking in pipeline; finally make whole pipeline system paralyse, have a strong impact on production efficiency.
Summary of the invention
The object of the invention is to solve the problem, avoiding pebble coal blocking in air-transport system, propose a kind of separate lines that is provided with to realize the pneumatic transmission feeding device of Large stone pebble coal pre-separation.Inevitably produce a large amount of pebble coal through coal mill, be separated before these bulky grain pebble coals enter main line, thus improve the reliability of 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 lines 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 are provided with downward separate lines 5, and the front end of feed pipe 2 and admission line 3 connection location is the charging accelerating sections 8 of feeding pipe 3 to admission line 3 and separate lines 5 connection location; The diameter of admission line 3, separate lines 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 the pebble coal of v to be diameter be 50mm is by the speed after charging accelerating sections 8 under the operating mode of valve 4 standard-sized sheet, and g is acceleration due to gravity.
The present invention also comprises the first stripper 6, second stripper 7, first stripper 6, second stripper 7 and is arranged in separate lines 5.
Conveying pipeline 9 end is provided with butt flange 10.
In the present invention, air-flow enters along admission line 3 level, pebble coal particle enters in admission line 3 by material collecting device 1 through feed pipe 2, under the effect of air-flow, pebble coal particle is by charging accelerating sections 8 and obtain certain kinematic velocity, theoretical by gas-particle two-phase fluid mechanics, the kinematic velocity of the particle of different-diameter is by variant, granule (diameter is less than 50mm) will obtain larger speed, cut-off footpath is particle generation speed under the operating mode of valve 4 standard-sized sheet of 50mm is v, 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 of separate lines 5 is identical with admission line 3 diameter, be d, owing to there is certain diff-H h in the vertical direction at the admission line 3 of separate lines 5 front portion and the conveying pipeline 9 at rear portion, leave the charging accelerating sections 8 of admission line 3 when pebble coal particle and enter after above separate lines 5, level throw motion will be done, due to admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2, wherein g is acceleration due to gravity, the displacement that diameter is greater than the pebble coal particle in the vertical direction of 50mm will be greater than h, therefore will all fall in separate lines 5, and the pebble coal particle being less than 50mm will be less than h due to the displacement of in the vertical direction, can by entering into conveying pipeline 9 above separate lines 5, and then continue to carry backward, complete in pebble coal particle automatic separation the be greater than with being less than diameter 50mm particle, separation method of the present invention is completed naturally by gravity, effect stability, and owing to being provided with 2 strippers in separate lines 5, stripper is opened in turn during discharging, the air-flow poured in bottom separate lines 5 during discharging can be avoided the impact of system stability, complete discharging simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the path of motion schematic diagram of different-grain diameter pebble coal particle in the present invention.
In figure: material collecting device 1, feed pipe 2, admission line 3, valve 4, separate lines 5, first stripper 6, second stripper 7, charging accelerating sections 8, conveying pipeline 9, butt flange 10.
Detailed description of the invention
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 lines 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 separate lines 5, the charging accelerating sections 8 that feed pipe 2 is feeding pipe 3 with the front end (in figure dotted line S position) of admission line 3 connection location to admission line 3 and separate lines 5 connection location (in figure dotted line E position), the diameter of admission line 3, separate lines 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 the pebble coal of v to be diameter be 50mm is by the speed after charging accelerating sections 8 under the operating mode of valve 4 standard-sized sheet, and g is acceleration due to gravity.
The present invention also comprises the first stripper 6, second stripper 7, first stripper 6, second stripper 7 and is arranged in separate lines 5.
Conveying pipeline 9 end is provided with butt flange 10.
Using method of the present invention and principle as follows: flange 10 can directly be connected with air-transport system, be convenient to transform existing system.Coal mill produces pebble coal particle and is transported to material collecting device 1 through screw feeder; enter in admission line 3 through feed pipe 2; whole pipeline is in negative pressure; the valve 4 of admission line 3 front end is opened; the air-flow sucked from admission line 3 will make pebble coal particle obtain certain kinematic velocity and by after charging accelerating sections 8; the length of charging accelerating sections 8 is 5 times of admission line 3 caliber, guarantees that the speed of pebble coal particle after charging accelerating sections 8 reaches a stable numerical value
Cut-off footpath is the pebble coal of 50mm is v by the speed after charging accelerating sections 8 under the operating mode of valve 4 standard-sized sheet, and this speed can adopt actual measurement or the method such as FLUENT software and the calculating of DEM Model coupling to obtain, and 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 the pebble coal particle of particle diameter > 50mm)
bulky grainbe less than v, the speed v of small size particle (mainly the pebble coal particle of particle diameter < 50mm)
granulev must be greater than.
The diameter of separate lines 5 is identical with admission line 3 diameter, be d, owing to there is certain diff-H h in the vertical direction at the admission line 3 of separate lines 5 front portion and the conveying pipeline 9 at rear portion, leave the charging accelerating sections 8 of admission line 3 when pebble coal particle and enter after above separate lines 5, level throw motion will be done, due to admission line 3 and conveying pipeline 9 diff-H h=gd
2/ 2v
2, wherein g is acceleration due to gravity.
Situation 1: pebble coal particle diameter being greater than to 50mm, according to h=gd
2/ 2v
2known, when g, d, all constant, h and v inversely, due to v
bulky grainbe less than v, therefore the displacement of bulky grain in the vertical direction also will be greater than h, therefore will all fall in separate lines 5.
Situation 2: pebble coal particle diameter being less than to 50mm, in like manner, due to v
granulebe greater than v, therefore the displacement of granule in the vertical direction will be less than h, can by entering into conveying pipeline 9 above separate lines 5, and then continue to carry backward, so far the automatic separation of more than diameter 50mm and following particle in pebble coal particle is completed, separation method of the present invention is completed naturally by gravity, effect stability, and owing to being provided with 2 strippers in separate lines 5, stripper is opened in turn during discharging, the air-flow poured in bottom separate lines 5 during discharging can be avoided the impact of system stability, complete discharging simultaneously.
Fig. 2 is the path of motion schematic diagram of the pebble coal particle of different-grain diameter, and in figure, A is bulky grain path curves, and B is granule path curves, the particle of different-grain diameter is after entering separation chamber, bulky grain will fall into separate lines 5, and granule is comparatively large due to speed, will enter conveying pipeline 9.
First stripper 6, second stripper 7 is installed in separate lines 5, by separate lines 5 points in order to upper and lower two parts, when the pebble coal on separate lines 5 top stockpiles certain altitude, first stripper 6 is opened, pebble coal drops to separate lines 5 bottom, i.e. first time discharging, after completing, the first stripper 6 closes immediately, and then open the second stripper 7 outwardly discharging of separate lines 5 bottom, i.e. second time discharging, the air-flow poured in bottom separate lines 5 when such operation avoids first time discharging 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 lines (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 separate lines (5), feed pipe (2) and the front end of admission line (3) connection location are the charging accelerating sections (8) of feeding pipe (3) to admission line (3) and separate lines (5) connection location, the diameter of admission line (3), separate lines (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 the pebble coal of v to be diameter be 50mm is by the speed after charging accelerating sections (8) under the operating mode of valve (4) standard-sized sheet, and 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), and the first stripper (6), the second stripper (7) are arranged in separate lines (5).
3. the pebble coal feeding device of Novel belt separation function according to claim 1, 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN103029989A CN103029989A (en) | 2013-04-10 |
| CN103029989B true 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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Families Citing this family (2)
| 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 |
| CN118387568B (en) * | 2024-06-28 | 2024-10-01 | 洛阳展尚建筑工程有限公司 | Belt conveyor for coal mine |
Family Cites Families (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 |
| ES2007660A6 (en) * | 1986-08-01 | 1989-07-01 | Stafford Robert George | Sepn. of same size particles having differing densities |
| 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 |
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2012
- 2012-12-28 CN CN201210581264.1A patent/CN103029989B/en not_active Expired - Fee Related
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| CN103029989A (en) | 2013-04-10 |
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