CN102824952A - Anti-blocking device for double-in and double-out ball type coal pulverizer separator - Google Patents
Anti-blocking device for double-in and double-out ball type coal pulverizer separator Download PDFInfo
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- CN102824952A CN102824952A CN2012103670699A CN201210367069A CN102824952A CN 102824952 A CN102824952 A CN 102824952A CN 2012103670699 A CN2012103670699 A CN 2012103670699A CN 201210367069 A CN201210367069 A CN 201210367069A CN 102824952 A CN102824952 A CN 102824952A
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Abstract
The invention discloses an anti-blocking device for a double-in and double-out ball type coal pulverizer separator. The anti-blocking device for the double-in and double-out ball type coal pulverizer separator comprises an outer conical barrel, an inner conical barrel and separator inlet radial baffles which are arranged on the inner conical barrel, wherein the end side surfaces of the separator inlet radial baffles and the outer edge of the upper end face of the inner conical barrel are positioned at the same height. According to the device, the end side surfaces of the separator inlet radial baffles and the outer edge of the upper end face of the inner conical barrel are positioned at the same height, so that the upper end face of the inner conical barrel is effectively prevented from supporting impurities which are attached to the separator inlet radial baffles, and the impurities can smoothly fall off under the action of gravity and airflow; and furthermore, a plurality of axial separation baffles are also uniformly arranged between the walls of the outer conical barrel and the inner conical barrel for preliminarily separating the rising pulverized coal air flow, the number of the separator inlet radial baffles are reduced, the distances between the separator inlet radial baffles are increased, the lengths of the separator inlet radial baffle are increased, furthermore, the double-out ball type coal pulverizer separator is prevented from being blocked, and the pulverized coal fineness and uniformity are ensured.
Description
Technical field
The present invention relates to a kind of anti-block apparatus, relate in particular to a kind of double inlet and outlet coal mill separator anti-block apparatus.
Background technology
At present, double inlet and outlet coal mill is owing to characteristics such as equipment availability are high, maintenance is convenient, coal adaptability is strong, and it has the advantage of low speed coal mill and medium-speed pulverizer concurrently in addition, therefore is widely used in the coal-fired power station boiler.
As shown in Figure 1; First wife's separator of double inlet and outlet coal mill is the radial separation device; Breeze airflow arrives separator top by the circular passage of tedge 1 between inner conical-tube 2 and external conical-tube 3; Air-flow turns to after the radially baffle plate 4 that is arranged on inner conical-tube 2 inlets gets into inner conical-tube 2 at a certain angle for 90 °; Air-flow is along the rotation of inner conical-tube 2 barrels, and coarse grained coal dust is separated and falls to inner conical-tube 2 bottoms along inner conical-tube 2 barrels under centrifugal action, and the fine grained coal dust is advanced into airduct 5 one time on separator top.The coarse granule coal dust that falls into inner conical-tube 2 bottoms is accumulating when a certain amount of; Under the self gravitation effect, press off six blocks of inner cone lock gas plates 6 of bottom; Leaving inner conical-tube 2 falls into the circular passage between tedge 1 and the external conical-tube 3 and comes downwards to back the powder tube bottom; Return the flapper 7 of coal dust on powder retrieving pipe and powder retrieving pipe of powder tube bottom and get back to the coal pulverizer inlet, get into coal pulverizer with the coal breakage of coal unloading tube and grind again.
In the actual motion, the serious phenomenon of blocking of foreign material often takes place in separator, and radially baffle plate 4 foreign material stop up, inner cone locks gas plate 6 foreign material bites and the powder retrieving pipe foreign material stop up to be embodied in separator inlet.Separator inlet is after radially baffle plate 4 stops up, the separator separates deleterious; Behind the inner cone lock gas plate 6 foreign material bites, inner cone lock gas plate 6 can't be closed, and the coal dust ascending air gets into separator inner conical-tube 2 through 6 short circuits of inner cone lock gas plate, causes separator separates efficient to reduce; It is levigate again that the later isolated meal of powder retrieving pipe obstruction can't be got back to coal pulverizer, further reduced the separating effect of separator.Any one goes wrong above-mentioned three links, all can make the fineness of pulverized coal chap, the pulverized coal fineness variation, and then cause ash content carbon to rise and the combustion stability reduction.Wherein, separator inlet radially the obstruction of baffle plate 4 are the one of the main reasons that cause the separator separates weak effect.With regard to existing cyclone separator arrangement, the breeze airflow of rising through 90 ° turn to after from separator inlet radially baffle plate 4 end horizontal directions get into inner conical-tube 2.As shown in Figure 2, separator inlet radially baffle plate 4 is arranged on inner conical-tube 2 upper surfaces one side, separator inlet radially outside the end of baffle plate 4 side-lower be inner conical-tube 2 upper surfaces, the width of inner conical-tube 2 upper surfaces is the distance of 30～40mm.The foreign material that contain in the breeze airflow that rises very easily are attached to separator inlet radially on the baffle plate 4; Increase along with the working time; The foreign material that separator inlet radially attaches on the baffle plate 4 increase on inner conical-tube 2 upper surfaces gradually, and at this moment, the effect of supporting has been played to the foreign material that separator inlet radially attaches on the baffle plate 4 in inner conical-tube 2 upper surfaces; The foreign material that make separator inlet radially attach on the baffle plate 4 can not come off; Radially the spacing of baffle plate 4 is less than normal for separator inlet in addition, particularly has the interval of suspension rod to hang foreign material easily at the suspension rod place, stops up along with the accumulation of running time forms.Therefore, the separator inlet radially relative position of baffle plate 4 ends and inner conical-tube 2 upper surfaces is unreasonable, has caused separator inlet radially to hang stifled foreign material in baffle plate 4 ends.
Present stage, many to the modification scheme of separator blockage problem, basically all be separator to be carried out integral body transform, change original separator and increased in size, with original separator inlet radially baffle plate 4 be replaced by axial baffle, and take the twin-stage baffle plate.Above-mentioned modification scheme expense is high, maintenance workload is big, the time between overhauls(TBO) is longer, and not exclusively the on-the-spot transformation of adaptation needs.
Summary of the invention
The purpose of this invention is to provide a kind of double inlet and outlet coal mill separator anti-block apparatus; Can effectively avoid the inner conical-tube upper surface that the foreign material that separator inlet radially attaches on the baffle plate are played a supporting role; Foreign material can be come off under gravity and airflow influence smoothly; Avoid two and go out separator for coal mill and stop up, guarantee fineness of pulverized coal and uniformity.
The present invention adopts following technical proposals:
A kind of double inlet and outlet coal mill separator anti-block apparatus; Comprise external conical-tube, inner conical-tube and be arranged on the separator inlet baffle plate radially on the inner conical-tube, it is characterized in that: the described separator inlet radially end sides of baffle plate flushes with inner conical-tube upper surface outer ledge.
Evenly be provided with a plurality of axial separation baffle plates between described external conical-tube and the inner conical-tube barrel.
Described inner conical-tube upper edge circumference evenly is provided with radially baffle plate of no more than 30 separator inlets, and the separator inlet radially length of baffle plate is not less than 260mm.
Described inner conical-tube upper edge circumference evenly is provided with radially baffle plate of 20 separator inlets, and the separator inlet radially length of baffle plate is 380mm.
The separator inlet of the setting of the present invention radially end sides of baffle plate flushes with inner conical-tube upper surface outer ledge; Effectively avoid the inner conical-tube upper surface that the foreign material that separator inlet radially attaches on the baffle plate are played a supporting role, foreign material can be come off under gravity and airflow influence smoothly; Further; The present invention also evenly is provided with a plurality of axial separation baffle plates between external conical-tube and inner conical-tube barrel, the breeze airflow that rises is carried out primary separation, and reduces the radially quantity of baffle plate of separator inlet; Increase the radially spacing between the baffle plate of separator inlet; Increase the radially length of baffle plate of separator inlet, further avoid two and go out separator for coal mill and stop up, guarantee fineness of pulverized coal and uniformity.
Description of drawings
Fig. 1 is the structural representation of existing double inlet and outlet coal mill radial separation device;
Fig. 2 is the existing separator inlet that is arranged on the inner conical-tube upper surface partial structurtes sketch map of baffle plate radially;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is the separator inlet that the is arranged on the inner conical-tube upper surface of the present invention partial structurtes sketch map of baffle plate radially.
The specific embodiment
Like Fig. 3 and shown in Figure 4; The present invention includes external conical-tube 3, inner conical-tube 2 and be arranged on the separator inlet baffle plate 4 radially on the inner conical-tube 2; The separator inlet radially end sides of baffle plate 4 flushes with inner conical-tube 2 upper surface outer ledges; Evenly be provided with a plurality of axial separation baffle plates 8 between external conical-tube 3 and inner conical-tube 2 barrels, inner conical-tube 2 upper edge circumference evenly are provided with radially baffle plate 4 of no more than 30 separator inlets, and the separator inlet radially length of baffle plate 4 is not less than 260mm.In the present embodiment, inner conical-tube upper edge circumference evenly is provided with radially baffle plate 4 of 20 separator inlets, and the separator inlet radially length of baffle plate 4 is 380mm.
The present invention in use; The foreign material that contain in the breeze airflow that rises will be attached to separator inlet radially on the baffle plate 4; Because the separator inlet radially end sides of baffle plate 4 flushes with inner conical-tube 2 upper surface outer ledges, when impurities accumulation arrives constant weight, under the effect of gravity and air-flow; The foreign material that separator inlet radially attaches on the baffle plate 4 will come off automatically, avoid two effectively and go out separator for coal mill and stop up.For the foreign material that contain in the breeze airflow of further avoiding rising will be attached to separator inlet radially on the baffle plate 4; The present invention has reduced the radially quantity of baffle plate 4 of separator inlet; Existing separator inlet radially baffle plate 4 quantity is 30; And the present invention only adopts radially baffle plate 4 of 20 separator inlets, has increased the radially spacing between the baffle plate 4 of separator inlet, and the foreign material of having avoided causing because of spacing is too small are assembled the obstruction separator; In order to guarantee to produce enough increase swirling eddies, the present invention has increased the radially length of baffle plate 4 of separator inlet simultaneously, and the separator inlet radially length of baffle plate 4 is set to 380mm, and the existing separator inlet radially length of baffle plate 4 is merely 260mm.A plurality of axial separation baffle plates 8 that the present invention also evenly is provided with between external conical-tube 3 and inner conical-tube 2 barrels can carry out primary separation to the breeze airflow that rises effectively, reduce the coal dust and the foreign material quantity that get into the top skimming baffle, alleviate the top separating pressure.
Claims (4)
1. double inlet and outlet coal mill separator anti-block apparatus; Comprise external conical-tube, inner conical-tube and be arranged on the separator inlet baffle plate radially on the inner conical-tube, it is characterized in that: the described separator inlet radially end sides of baffle plate flushes with inner conical-tube upper surface outer ledge.
2. double inlet and outlet coal mill separator anti-block apparatus according to claim 1 is characterized in that: evenly be provided with a plurality of axial separation baffle plates between described external conical-tube and the inner conical-tube barrel.
3. double inlet and outlet coal mill separator anti-block apparatus according to claim 1 and 2; It is characterized in that: described inner conical-tube upper edge circumference evenly is provided with radially baffle plate of no more than 30 separator inlets, and the separator inlet radially length of baffle plate is not less than 260mm.
4. double inlet and outlet coal mill separator anti-block apparatus according to claim 3 is characterized in that: described inner conical-tube upper edge circumference evenly is provided with radially baffle plate of 20 separator inlets, and the separator inlet radially length of baffle plate is 380mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103670699A CN102824952A (en) | 2012-09-27 | 2012-09-27 | Anti-blocking device for double-in and double-out ball type coal pulverizer separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103670699A CN102824952A (en) | 2012-09-27 | 2012-09-27 | Anti-blocking device for double-in and double-out ball type coal pulverizer separator |
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| CN102824952A true CN102824952A (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103670699A Pending CN102824952A (en) | 2012-09-27 | 2012-09-27 | Anti-blocking device for double-in and double-out ball type coal pulverizer separator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104438087A (en) * | 2014-12-25 | 2015-03-25 | 中国华电集团科学技术研究总院有限公司 | Axially and radially combined type tailing separator |
| CN105195341A (en) * | 2015-06-09 | 2015-12-30 | 中国大唐集团科学技术研究院有限公司 | Double-in and double-out steel ball coal mill shaft diameter combined separator |
| CN109967217A (en) * | 2019-03-28 | 2019-07-05 | 中国华能集团清洁能源技术研究院有限公司 | A kind of axial separation device and its separation method for medium-speed pulverizer |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275631A (en) * | 1992-08-17 | 1994-01-04 | Brown Charles K | Coal pulverizer purifier classifier |
| US5513599A (en) * | 1993-03-03 | 1996-05-07 | Ebara Corporation | Pressurized internal circulating fluidized-bed boiler |
| CN2289608Y (en) * | 1997-03-07 | 1998-09-02 | 青岛第二锅炉辅机厂 | Dynamic middlings separator |
| CN2602833Y (en) * | 2003-03-06 | 2004-02-11 | 国电热工研究院 | Improved series double-axial raw powder separator |
| CN1872419A (en) * | 2005-06-01 | 2006-12-06 | 上海重型机器厂有限公司 | Steel ball coal mill with dual inputs and dual outputs |
| CN101380631A (en) * | 2007-09-04 | 2009-03-11 | 上海重型机器厂有限公司 | Separator for coal mill |
| CN202199508U (en) * | 2011-08-10 | 2012-04-25 | 詹爱平 | Rotary coarse coal powder separator with both fixed blades and moving blades |
| CN202778678U (en) * | 2012-09-27 | 2013-03-13 | 河南省电力公司电力科学研究院 | Double-inlet and double-outlet coal mill separator anti-blocking device |
-
2012
- 2012-09-27 CN CN2012103670699A patent/CN102824952A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275631A (en) * | 1992-08-17 | 1994-01-04 | Brown Charles K | Coal pulverizer purifier classifier |
| US5513599A (en) * | 1993-03-03 | 1996-05-07 | Ebara Corporation | Pressurized internal circulating fluidized-bed boiler |
| CN2289608Y (en) * | 1997-03-07 | 1998-09-02 | 青岛第二锅炉辅机厂 | Dynamic middlings separator |
| CN2602833Y (en) * | 2003-03-06 | 2004-02-11 | 国电热工研究院 | Improved series double-axial raw powder separator |
| CN1872419A (en) * | 2005-06-01 | 2006-12-06 | 上海重型机器厂有限公司 | Steel ball coal mill with dual inputs and dual outputs |
| CN101380631A (en) * | 2007-09-04 | 2009-03-11 | 上海重型机器厂有限公司 | Separator for coal mill |
| CN202199508U (en) * | 2011-08-10 | 2012-04-25 | 詹爱平 | Rotary coarse coal powder separator with both fixed blades and moving blades |
| CN202778678U (en) * | 2012-09-27 | 2013-03-13 | 河南省电力公司电力科学研究院 | Double-inlet and double-outlet coal mill separator anti-blocking device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104438087A (en) * | 2014-12-25 | 2015-03-25 | 中国华电集团科学技术研究总院有限公司 | Axially and radially combined type tailing separator |
| CN105195341A (en) * | 2015-06-09 | 2015-12-30 | 中国大唐集团科学技术研究院有限公司 | Double-in and double-out steel ball coal mill shaft diameter combined separator |
| CN109967217A (en) * | 2019-03-28 | 2019-07-05 | 中国华能集团清洁能源技术研究院有限公司 | A kind of axial separation device and its separation method for medium-speed pulverizer |
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Application publication date: 20121219 |