CN110918240A - Baffle type static separator of wheel type coal mill - Google Patents
Baffle type static separator of wheel type coal mill Download PDFInfo
- Publication number
- CN110918240A CN110918240A CN201911368018.6A CN201911368018A CN110918240A CN 110918240 A CN110918240 A CN 110918240A CN 201911368018 A CN201911368018 A CN 201911368018A CN 110918240 A CN110918240 A CN 110918240A
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- Prior art keywords
- shell
- blade
- conical
- separator
- powder
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 230000003068 static effect Effects 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 48
- 241000237942 Conidae Species 0.000 claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 230000000452 restraining effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/14—Edge runners, e.g. Chile mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
A wheel mill baffled static separator comprising: the device comprises a conical surface shell, a conical surface inner hopper, a distributor, a coal dropping pipe, blades, a blade control device, a powder returning device and a coal dropping grid at the lower end of a separator. The improvement is as follows: the blade control device uses a hand-operated manual push rod; arranging an L-shaped guide plate on the windward side of the blade; a restriction seat at the lower end of a blade rotating shaft is additionally arranged at the upper opening of the conical inner bucket; the powder returning device is composed of an inner cone shell, an outer cone shell and a gravity closed powder discharging door. The invention has the positive effects that: the blade control device is changed into a manual push rod type, so that the blade control device is simple in structure, more convenient to operate, convenient to adjust and accurate in corner. The two ends of each blade are fixed, so that the blades are kept vertical and at the same angle, the separation effect is improved, the guide plates are additionally arranged on the blades, the tangential airflow proportion is increased, and the separation efficiency is improved. The powder returning mechanism is changed into the dead weight type powder discharging of the combination of the inner conical shell and the outer conical shell, the efficiency of collecting the fallen coal powder is higher, the structure is simple, and the production and manufacturing cost of the device is reduced.
Description
Technical Field
The invention belongs to the field of mechanical equipment, and particularly relates to a wheel type coal mill for grinding raw coal into powder.
Background
A wheel coal mill (referred to as a medium speed coal mill in the industry) is a common device used in production enterprises such as thermal power plants, chemical plants or iron and steel plants to mill raw coal into coal powder with a certain fineness requirement. According to the difference of the volatile components of the raw coal, the static separator is mostly used for separating the air and the powder after the powder is ground by the coal mill. The static separator in the prior wheel coal mill is shown in figure 1: the coal dust separator comprises a conical surface shell 1 with a large upper part and a small lower part, a conical surface inner bucket 2 with a large upper part and a small lower part, a distributor 3 with a coaxial line positioned above the conical surface inner bucket 2, a coal dropping pipe 4 connected with the lower end of the distributor 3 and extending to the bottom end of the separator, a plurality of blades 5 which are circumferentially distributed and arranged on the lower side of an annular cover plate at the upper end of the shell, a blade control device 6 which pushes the blades 5 in an orthogonal bevel gear transmission mode, a powder returning cone 7 at the lower end of the conical surface inner bucket, and a coal dropping grating 8 at the.
The existing separator for the coal mill has the following defects: the blade control device adopting the orthogonal bevel gear transmission mode is complex in structure, labor is wasted in adjusting the blade angle, the angle adjustment cannot accurately meet the requirement, the fault rate is high, the appearance is large, the blade needs to be vertically placed, the blade is easy to interfere with other components, and the arrangement of the top of the separator is too dense. One end of each separator stationary blade is fixed, and the blades are prone to tilting. The tangential airflow formed by the air-powder mixture is not obvious, and the centrifugal separation efficiency of the pulverized coal is not high. The cone is petal type, not only the structure is complex, the production cost is increased, the cone is easy to be jammed, the coarse coal powder can not fall into the millstone to be milled again, and the separator can not be fully realized.
Disclosure of Invention
The invention aims to provide a baffle type static separator of a wheel coal mill, which is used for separating air and powder mixture separated from a grinding disc and overcomes the defects of the existing separator.
The baffle-type static separator of the present invention comprises: the separator comprises a conical shell, a conical inner hopper which is coaxially assembled in the shell with the shell, a distributor which is coaxially positioned above the conical inner hopper, a coal dropping pipe which is coaxially arranged at the lower end of the distributor and extends to the bottom end of the separator, a blade control device on a cover plate at the upper end of the shell, a plurality of blades which are circumferentially distributed and arranged at the lower side of the cover plate at the upper end of the shell, a powder returning device at the lower end of the conical inner hopper and a coal dropping grid at the lower end.
The improvement is as follows: the separator blade operating device uses a hand-operated manual push rod (a commodity standard component), a screw sleeve of the manual push rod is hinged on a hinge shaft seat on a cover plate at the upper end of the conical shell by a vertical hinge shaft, and the front end of a screw rod on the manual push rod is hinged on a shaft seat fixed on the positioning ring by the vertical hinge shaft.
In order to promote the wind-powder mixture to form tangential airflow, the invention is further improved in that an L-shaped guide plate perpendicular to the plate surface is arranged at the upper end of the windward side of the blade, and the guide plate comprises a flat section close to the upper end of the blade and an inclined downward-folded section extending to the opposite side of the rotating shaft of the blade.
In order to improve the stability of the blades on the assembly position, a restraining seat at the lower end of a blade rotating shaft is additionally arranged on the periphery of an upper opening of the conical inner bucket, and a blade shaft assembly hole is formed in the restraining seat.
In order to simplify the structure of the powder return cone and eliminate the jamming phenomenon of the powder return, the powder return device at the lower end of the conical surface inner hopper consists of an inner cone shell which surrounds the lower end of the coal dropping pipe and is small at the top and big at the bottom and an outer cone shell which is connected with the lower end of the conical surface inner hopper and is small at the top and big at the bottom, the lower end of the outer cone shell is connected with the lower end of the inner cone shell in a closing way, and the taper of the outer cone shell is greater than that of the inner cone shell. The outer cone shell is provided with a powder discharge port, the powder discharge port is provided with a gravity closed powder discharge door, and the powder discharge door is arranged at the position of the closed powder discharge port through a hinged support fixed on the outer cone shell or the lower end of the conical inner hopper or a hook hooked at the upper end of the powder discharge door.
The invention has the positive effects that: the blade control device is changed into a manual push rod type, so that the blade control device is simple in structure, more convenient to operate, and convenient for adjusting the blade angle, the blade angle is more accurately adjusted, and meanwhile, the production and manufacturing cost is reduced; the blades are fixed at two ends, so that the blades are always kept at correct vertical positions, the angle consistency of a group of blades is ensured, the separation effect of the separator on the fineness of the pulverized coal particles is improved, and the total qualified pulverized coal amount is increased; the additional guide plate obviously increases the proportion of the tangential airflow of the air-powder mixture, and the centrifugal separation efficiency of the pulverized coal is higher; the powder returning mechanism is changed into the dead weight type powder discharging of the combination of the inner conical shell and the outer conical shell, so that the efficiency of collecting the fallen coal powder is higher, the structure is simpler, and the production and manufacturing cost of the device is reduced.
Drawings
Fig. 1 is an overall configuration diagram of a conventional static separator for a wheel mill.
FIG. 2 is an overall view of the static separator of the present invention.
FIG. 3 is an installation view of the manual push rod operating device for the vanes of the static separator of the present invention.
FIG. 4 is a front view of a static separator blade according to the present invention.
FIG. 5 is a top view of a static separator blade according to the present invention.
FIG. 6 is a partially enlarged view of the cone-shaped inner hopper powder returning device of the static separator of the present invention.
Detailed Description
Referring to fig. 2, the separator of the present invention comprises: the separator comprises a conical surface shell 1, a conical surface inner hopper 2 which is coaxially assembled in the shell 1 with the shell, a distributor 3 which is coaxially positioned above the conical surface inner hopper 2, a coal dropping pipe 4 which is coaxially arranged at the lower end of the distributor 3 and extends to the bottom end of the separator, a plurality of blades 5 which are circumferentially distributed and arranged at the lower side of an upper end cover plate of the shell 1, a blade control device arranged on the upper end cover plate of the shell 1, a powder returning device at the lower end of the conical surface inner hopper, and a coal dropping grid 8 at the lower end.
Referring to fig. 2 and 3, the improvement is: the separator blade operating device uses a hand-operated manual push rod 9 (a commodity standard component), a thread sleeve of the manual push rod 9 is hinged on a hinge shaft seat on a cover plate at the upper end of the conical surface shell by a vertical hinge shaft, and the front end of a screw rod on the manual push rod is hinged on a shaft seat fixed on the positioning ring by the vertical hinge shaft.
Referring to fig. 4 and 5, in order to promote the wind-powder mixture to form a tangential airflow, the invention further improves that an L-shaped guide plate 10 perpendicular to the plate surface is arranged at the upper end of the windward side of the blade 5, and the guide plate comprises a flat section close to the upper end of the blade and an inclined downward-folded section extending to the opposite side of the rotating shaft of the blade.
Referring to fig. 2, in order to improve the stability of the blades in the assembly position, a ring plate-shaped restraining seat 11 for restraining the lower end of the rotating shaft of each blade is additionally arranged on the periphery of the upper opening of the conical inner bucket 2, and the restraining seat 11 is provided with a blade shaft assembly hole.
Referring to fig. 2 and 6, in order to simplify the structure of the powder return cone and eliminate the jamming phenomenon of the powder return, the powder return device at the lower end of the conical inner hopper comprises an inner cone shell 12 which surrounds the lower end of the coal dropping pipe and is small at the top and big at the bottom, and an outer cone shell 13 which is connected with the lower end of the conical inner hopper and is small at the top and big at the bottom, the lower end of the outer cone shell 13 is connected with the lower end of the inner cone shell 12 in a closed manner, and the taper of the outer cone shell 13 is greater than that of the inner cone shell 12. The outer cone shell 13 is provided with a powder discharging opening, the powder discharging opening is provided with a gravity closed powder discharging door 14, and the powder discharging door is arranged at the position of covering the powder discharging opening through a hook 15 which is fixed on the outer cone shell or at the lower end of the conical inner hopper and is hooked at the upper end of the powder discharging door 14.
Claims (4)
1. The utility model provides a wheeled coal pulverizer baffle formula static separator, includes conical surface shell, fight in the conical surface of shell coaxial line assembly in the shell, the distributor of fighting the top in the conical surface is located to the coaxial line, the coaxial line is installed at the distributor lower extreme and is extended the coal breakage pipe of separator bottom, the blade controlling device on the shell body upper end apron, circumference distribution install the multi-disc blade of shell upper end apron downside, return the whitewashed device of fighting the lower extreme in the conical surface, the coal breakage grid of separator lower extreme, characterized by: the separator blade operating device uses a hand-operated manual push rod, a screw sleeve of the manual push rod is hinged on a hinge shaft seat on the cover plate at the upper end of the conical surface shell by a vertical hinge shaft, and the front end of a screw rod on the manual push rod is hinged on a shaft seat fixed on the positioning ring by the vertical hinge shaft.
2. The wheel mill baffled static separator of claim 1, wherein: the upper end of the windward side of the blade is provided with an L-shaped guide plate perpendicular to the plate surface, and the guide plate comprises a horizontal section close to the upper end of the blade and an oblique downward-folded section extending to the opposite side of the rotating shaft of the blade.
3. The wheel mill baffled static separator of claim 1, wherein: the periphery of the upper opening of the conical inner bucket is additionally provided with a restraining seat at the lower end of the blade rotating shaft, and the restraining seat is provided with a blade shaft assembling hole.
4. The wheel mill baffled static separator of claim 1, wherein: the powder returning device at the lower end of the conical surface inner hopper comprises an inner conical shell which surrounds the lower end of the coal dropping pipe and is small at the upper part and large at the lower part, and an outer conical shell which is connected with the lower end of the conical surface inner hopper and is small at the upper part and large at the lower part, wherein the lower end of the outer conical shell is connected with the lower end of the inner conical shell in a closed mode, and the taper of the outer conical shell is larger than that of the inner conical shell. The outer cone shell is provided with a powder discharge port, the powder discharge port is provided with a gravity closed powder discharge door, and the powder discharge door is arranged at the position of the closed powder discharge port through a hinged support fixed on the outer cone shell or the lower end of the conical inner hopper or a hook hooked at the upper end of the powder discharge door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368018.6A CN110918240A (en) | 2019-12-26 | 2019-12-26 | Baffle type static separator of wheel type coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911368018.6A CN110918240A (en) | 2019-12-26 | 2019-12-26 | Baffle type static separator of wheel type coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110918240A true CN110918240A (en) | 2020-03-27 |
Family
ID=69862184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911368018.6A Pending CN110918240A (en) | 2019-12-26 | 2019-12-26 | Baffle type static separator of wheel type coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110918240A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR569595A (en) * | 1922-10-20 | 1924-04-14 | Wheeled sprayer improvements | |
| GB1450864A (en) * | 1973-01-29 | 1976-09-29 | Gilbert Associates | Process for pulverizing coal to ulttrafine size |
| US5622321A (en) * | 1994-07-06 | 1997-04-22 | Loesche Gmbh | Mill classifier |
| CN2411852Y (en) * | 2000-01-14 | 2000-12-27 | 吴同钧 | Frequency changing speed regulating rough powder separator |
| CN201815364U (en) * | 2010-09-21 | 2011-05-04 | 上海安敏机电设备厂 | Rotor-stator combination type pulverized coal separator |
| CN202725303U (en) * | 2012-08-15 | 2013-02-13 | 四川皇龙智能破碎技术股份有限公司 | Static separator for mill |
| CN107537632A (en) * | 2016-06-26 | 2018-01-05 | 王承志 | A kind of static separation device |
| CN208839710U (en) * | 2018-08-06 | 2019-05-10 | 大峘集团有限公司 | A kind of synchronous rotation device applied in vertical ball mill |
| CN110404660A (en) * | 2019-07-10 | 2019-11-05 | 大唐东北电力试验研究院有限公司 | A kind of medium-speed pulverizer vane current equalizing structure |
| CN211707070U (en) * | 2019-12-26 | 2020-10-20 | 中国电建集团长春发电设备有限公司 | Baffle type static separator of wheel type coal mill |
-
2019
- 2019-12-26 CN CN201911368018.6A patent/CN110918240A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR569595A (en) * | 1922-10-20 | 1924-04-14 | Wheeled sprayer improvements | |
| GB1450864A (en) * | 1973-01-29 | 1976-09-29 | Gilbert Associates | Process for pulverizing coal to ulttrafine size |
| US5622321A (en) * | 1994-07-06 | 1997-04-22 | Loesche Gmbh | Mill classifier |
| CN2411852Y (en) * | 2000-01-14 | 2000-12-27 | 吴同钧 | Frequency changing speed regulating rough powder separator |
| CN201815364U (en) * | 2010-09-21 | 2011-05-04 | 上海安敏机电设备厂 | Rotor-stator combination type pulverized coal separator |
| CN202725303U (en) * | 2012-08-15 | 2013-02-13 | 四川皇龙智能破碎技术股份有限公司 | Static separator for mill |
| CN107537632A (en) * | 2016-06-26 | 2018-01-05 | 王承志 | A kind of static separation device |
| CN208839710U (en) * | 2018-08-06 | 2019-05-10 | 大峘集团有限公司 | A kind of synchronous rotation device applied in vertical ball mill |
| CN110404660A (en) * | 2019-07-10 | 2019-11-05 | 大唐东北电力试验研究院有限公司 | A kind of medium-speed pulverizer vane current equalizing structure |
| CN211707070U (en) * | 2019-12-26 | 2020-10-20 | 中国电建集团长春发电设备有限公司 | Baffle type static separator of wheel type coal mill |
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