CN103623894A - Double-inlet and double-outlet steel ball coal mill - Google Patents
Double-inlet and double-outlet steel ball coal mill Download PDFInfo
- Publication number
- CN103623894A CN103623894A CN201310529502.9A CN201310529502A CN103623894A CN 103623894 A CN103623894 A CN 103623894A CN 201310529502 A CN201310529502 A CN 201310529502A CN 103623894 A CN103623894 A CN 103623894A
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- 239000003245 coal Substances 0.000 title claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000005265 energy consumption Methods 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009183 running Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
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Abstract
The invention discloses a double-inlet and double-outlet steel ball coal mill, which comprises: the rotation portion and connect the transport portion at rotation portion both ends, wherein, rotation portion includes the barrel, the inside grinding ball that is equipped with of barrel, the dress ball volume of barrel is 39.6% of barrel volume. According to the double-inlet and double-outlet steel ball coal mill provided by the invention, the ball loading amount of the cylinder body accounts for 39.6% of the volume of the cylinder body, and compared with the traditional coal mill, the ball loading amount is reduced by 40%, so that the total weight of grinding balls in the cylinder body is reduced, the energy consumption caused by the rotation of the cylinder body is reduced, and the energy consumption caused by the operation of the coal mill is further reduced.
Description
Technical field
The present invention relates to thermal power plant's powder process field, specifically, relate to a kind of double-inlet and double-outlet steel ball coal mill.
Background technology
In thermal power plant's operation, there is the equipment of a large amount of runnings, for example, and power plant's pulverized coal preparation system coal pulverizer etc., the running of these equipment can bring huge energy consumption.
Take coal pulverizer as example, and now widely used coal pulverizer is double-inlet and double-outlet steel ball coal mill.Double-inlet and double-outlet steel ball coal mill, by the rotation of cylindrical shell, is promoted to certain altitude by the steel ball of some diameters in cylindrical shell, by freely falling of steel ball, coal is clashed into and is rubbed coal grinding.Yet the steel ball that common coal pulverizer uses wears no resistance, service life is short, and the steel ball of medium-small diameter is easy to abrasion deformation, therefore,, when being equipped with steel ball for coal pulverizer, be difficult to improve the ratio of medium-small diameter steel ball, cause coal pulverizer ball load to reduce, cannot reduce energy consumption.
Summary of the invention
The invention provides a kind of double-inlet and double-outlet steel ball coal mill, solved the problem that traditional coal pulverizer cannot reduce energy consumption.
The invention provides a kind of double-inlet and double-outlet steel ball coal mill, described coal pulverizer comprises: rotation section and be connected to the delivery section at two ends, described rotation section, and wherein, described rotation section comprises cylindrical shell, described inner barrel is equipped with mill ball, and the ball load of described cylindrical shell is 39.6% of described cylindrical shell volume.
Preferably, described mill ball case hardness is 60HRC.
Preferably, the poor 1HRC that is less than of the centre hardness of described mill ball and case hardness.
From above technical scheme, double-inlet and double-outlet steel ball coal mill provided by the present invention, the ball load of cylindrical shell accounts for 39.6% of described cylindrical shell volume, with respect to traditional coal pulverizer, ball load has reduced 40%, the gross weight of mill ball in cylindrical shell is reduced, thereby the energy consumption of bringing while reducing barrel body rotation has further reduced the energy consumption that coal pulverizer operation brings.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.Shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will be more clear.In whole accompanying drawings, identical Reference numeral is indicated identical part.Deliberately by actual size equal proportion convergent-divergent, do not draw accompanying drawing, focus on illustrating purport of the present invention.
Fig. 1 is the structural representation of double-inlet and double-outlet steel ball coal mill provided by the invention;
Fig. 2 is the structural representation of cylindrical shell provided by the invention.
The specific embodiment
Conventionally, double-inlet and double-outlet steel ball coal mill is when operation, and most energy consumption drives its inner mill ball running to produce by cylindrical shell.And while producing coal pulverizer, the data that the specification of mill ball and ball load provide according to coal pulverizer manufacturer are configured.Therefore, cause coal pulverizer ball load in higher value, coal pulverizer energy consumption cannot be reduced.
Based on this, the invention provides a kind of double-inlet and double-outlet steel ball coal mill, by reducing the ball load of coal pulverizer, reduce the gross mass of mill ball in cylindrical shell, thereby reduced the energy consumption that cylindrical shell operation brings, further reduced the energy consumption that coal pulverizer operation brings.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Secondly, the present invention is described in detail in conjunction with schematic diagram, when detailed description is of the present invention; for ease of explanation; the schematic diagram of indication device structure can be disobeyed general ratio and be done local amplification, and described schematic diagram is example, and it should not limit the scope of protection of the invention at this.The three-dimensional space that should comprise in addition, length, width and the degree of depth in actual fabrication.
Referring to Fig. 1, the structural representation that Fig. 1 is double-inlet and double-outlet steel ball coal mill provided by the invention.
Described coal pulverizer comprises: rotation section 2 and be connected to the delivery section 1 at 2 two ends, described rotation section.Wherein, described rotation section 2 comprises cylindrical shell, and described inner barrel is equipped with mill ball, and the ball load of described cylindrical shell is 39.6% of described cylindrical shell volume.
It may be noted that, described delivery section 1 is for carry raw coal in cylindrical shell, and in course of conveying, raw coal carried out air-dry, and when cylindrical shell completes after grinding raw coal, coal dust is delivered in boiler and is burnt by delivery section.Accordingly, described delivery section 1 comprises the parts such as mixed coal case, auger conveyor, separator.The structure of double-inlet and double-outlet steel ball coal mill and the course of work, the technology being well known to those skilled in the art, the present invention does not repeat them here.
The double-inlet and double-outlet steel ball coal mill that the present embodiment provides, the ball load of cylindrical shell accounts for 39.6% of described cylindrical shell volume, with respect to traditional coal pulverizer, ball load has reduced 40%, the gross weight of mill ball in cylindrical shell is reduced, thereby the energy consumption of bringing while reducing barrel body rotation, has further reduced the energy consumption that coal pulverizer operation brings.
Referring to Fig. 2, the structural representation that Fig. 2 is cylindrical shell provided by the invention.
In cylindrical shell, 21 are provided with liner plate, and the port 22 at two ends is connected with delivery section by auger conveyor, and described inner barrel is equipped with mill ball.
The mill ball of tradition coal pulverizer is mostly middle chromium or high-chromium cast-iron ball, and the mill ball of this material wears no resistance, and the life-span is short, distortion easy to wear during use.The mill ball that the present embodiment provides is high-alloy wear-resisting casting iron steel ball, through special Technology for Heating Processing, case hardness is up to 60 Rockwell hardness (HRC, Rockwell hardness), the poor 1HRC that is less than of centre hardness and case hardness, not only improve the wearability of mill ball, and there is the well-balanced property of good wearing and tearing.
The mill ball that the present embodiment provides, because tool has good wearability and weares and teares well-balanced property, so, under pulverizer capacity permanence condition, guarantee same fineness of pulverized coal, with respect to traditional coal pulverizer, the ball load of coal pulverizer proposed by the invention still less, cylindrical shell quality is less, thereby has reduced the energy consumption that coal pulverizer operation produces.
With a concrete example explanation, five double-inlet and double-outlet steel ball coal mills of a 600MW unit configuration, during traditional coal pulverizer EIAJ 69t/h, coal-grinding unit power consumption 22.11kW/t.Adopt coal pulverizer provided by the present invention, pulverizer capacity is 70.2t/h, coal-grinding unit power consumption 13.58kW/t.If whole year operation hour calculated by 6000 hours, compare with traditional coal pulverizer, coal pulverizer year economize on electricity 353.14 ten thousand degree, 5 coal pulverizers amount to economize on electricity 1765.71 ten thousand degree.
Seen from the above description, double-inlet and double-outlet steel ball coal mill provided by the present invention, the ball load of cylindrical shell accounts for 39.6% of described cylindrical shell volume, with respect to traditional coal pulverizer, ball load has reduced 40%, the gross weight of mill ball in cylindrical shell is reduced, thereby the energy consumption of bringing while reducing barrel body rotation has further reduced the energy consumption that coal pulverizer operation brings.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.
Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (3)
1. a double-inlet and double-outlet steel ball coal mill, is characterized in that, described coal pulverizer comprises: rotation section and be connected to the delivery section at two ends, described rotation section, wherein, described rotation section comprises cylindrical shell, and described inner barrel is equipped with mill ball, and the ball load of described cylindrical shell is 39.6% of described cylindrical shell volume.
2. coal pulverizer as claimed in claim 1, is characterized in that, described mill ball case hardness is 60HRC.
3. coal pulverizer as claimed in claim 2, is characterized in that, the poor 1HRC that is less than of the centre hardness of described mill ball and case hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529502.9A CN103623894A (en) | 2013-10-31 | 2013-10-31 | Double-inlet and double-outlet steel ball coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529502.9A CN103623894A (en) | 2013-10-31 | 2013-10-31 | Double-inlet and double-outlet steel ball coal mill |
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| CN103623894A true CN103623894A (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310529502.9A Pending CN103623894A (en) | 2013-10-31 | 2013-10-31 | Double-inlet and double-outlet steel ball coal mill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180384A (en) * | 2014-08-14 | 2014-12-03 | 西安西热锅炉环保工程有限公司 | System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler |
| CN115337999A (en) * | 2022-08-29 | 2022-11-15 | 河北西柏坡第二发电有限责任公司 | Calculation method for steel ball amount periodically replenished by steel ball coal mill |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321030A (en) * | 1976-08-11 | 1978-02-27 | Toyo Chiyuukou Kk | Crushing balls |
| EP0336090A1 (en) * | 1988-04-06 | 1989-10-11 | GS Technologies Operating Co., Inc. | Bainitic core grinding rod |
| CN1053267A (en) * | 1991-01-16 | 1991-07-24 | 河北工学院 | Casting-state troostite grinding ball |
| CN1117405A (en) * | 1994-08-22 | 1996-02-28 | 戴阿朱玛斯公司 | Pulverized coal fuel preparation process |
| CN1158362A (en) * | 1996-12-06 | 1997-09-03 | 魁永生 | Multicomponent alloyed cast and forged wearing, corrosion resistant and high toughness grinding balls and its prodn. method |
| CN2516245Y (en) * | 2002-02-04 | 2002-10-16 | 王新生 | High-alumina porcelain ball for egg-shaped briquet machine |
| CN1851026A (en) * | 2006-05-19 | 2006-10-25 | 江苏共昌轧辊有限公司 | High-chromium cast steel milling ball, and its preparing method |
| 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 |
| CN1944700A (en) * | 2006-10-26 | 2007-04-11 | 昆明理工大学 | Bainite ductile iron grinding ball and its producing process |
-
2013
- 2013-10-31 CN CN201310529502.9A patent/CN103623894A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321030A (en) * | 1976-08-11 | 1978-02-27 | Toyo Chiyuukou Kk | Crushing balls |
| EP0336090A1 (en) * | 1988-04-06 | 1989-10-11 | GS Technologies Operating Co., Inc. | Bainitic core grinding rod |
| CN1053267A (en) * | 1991-01-16 | 1991-07-24 | 河北工学院 | Casting-state troostite grinding ball |
| CN1117405A (en) * | 1994-08-22 | 1996-02-28 | 戴阿朱玛斯公司 | Pulverized coal fuel preparation process |
| CN1158362A (en) * | 1996-12-06 | 1997-09-03 | 魁永生 | Multicomponent alloyed cast and forged wearing, corrosion resistant and high toughness grinding balls and its prodn. method |
| CN2516245Y (en) * | 2002-02-04 | 2002-10-16 | 王新生 | High-alumina porcelain ball for egg-shaped briquet machine |
| 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 |
| CN1851026A (en) * | 2006-05-19 | 2006-10-25 | 江苏共昌轧辊有限公司 | High-chromium cast steel milling ball, and its preparing method |
| CN1944700A (en) * | 2006-10-26 | 2007-04-11 | 昆明理工大学 | Bainite ductile iron grinding ball and its producing process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180384A (en) * | 2014-08-14 | 2014-12-03 | 西安西热锅炉环保工程有限公司 | System and method of blending combustion of coal type with low ash melting point in coal-fired utility boiler |
| CN104180384B (en) * | 2014-08-14 | 2016-08-24 | 西安西热锅炉环保工程有限公司 | Coal-fired power station boiler mixes the System and method for burning low ash smelting point coal |
| CN115337999A (en) * | 2022-08-29 | 2022-11-15 | 河北西柏坡第二发电有限责任公司 | Calculation method for steel ball amount periodically replenished by steel ball coal mill |
| CN115337999B (en) * | 2022-08-29 | 2023-10-20 | 河北西柏坡第二发电有限责任公司 | Method for periodically supplementing steel ball for steel ball coal mill |
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Application publication date: 20140312 |