CN103611616A - Lime stone milling system - Google Patents
Lime stone milling system Download PDFInfo
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- CN103611616A CN103611616A CN201310601925.7A CN201310601925A CN103611616A CN 103611616 A CN103611616 A CN 103611616A CN 201310601925 A CN201310601925 A CN 201310601925A CN 103611616 A CN103611616 A CN 103611616A
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- milling system
- rod mill
- lime stone
- limestone
- rod
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Abstract
The invention discloses a lime stone milling system. According to the lime stone milling system, lime stone raw materials in a raw material hopper are crushed and are conveyed into a finished-product cabin; the lime stone milling system comprises a rod mill and an elevator for conveying a finished product crushed by the rod mill into the finished-product cabin; a double-layered rod gate and a weighing type feeding machine are arranged between the raw material hopper and the rod mill; the lime stone raw materials in the raw material hopper are respectively fed into the rod mill by the double-layered rod gate and the weighing type feeding machine; a double-hammer plate overturning valve is arranged between a discharging opening of the rod mill and the elevator. The lime stone milling system can be used for milling block-shaped materials into powdery materials; the lime stone milling system is economical and practical; the reaction activity of lime stones is improved and the aim of desulfurization by a CFB (Circulating Fluid Bed) boiler is realized.
Description
technical field
The present invention relates to a kind of limestone milling system that lump material is finely ground to granular material, especially for the production of CFB desulphurizer of boiler.
Background technology
Energy and environment are two large problems of current social development, and in the utilization of the energy, the burning of fossil fuel will give off a large amount of pollutants.For example, China enters the 87%SO in atmosphere every year
2, 68%NO
xall come from the direct burning of coal with 60% dust, therefore, develop efficient, oligosaprobic clean coal combustion technology, reduce NO
xand SO
2discharge capacity be current problem demanding prompt solution.
CFBB is efficient, the oligosaprobic clean burning technology of a new generation that recent two decades grows up in the world, its main feature is that fuel and desulfurizing agent are through repeatedly circulating, carry out repeatedly low-temperature burning and desulphurization reaction, the interior turbulent motion of stove is strong, not only can reach low NO
xdischarge, 90% desulfuration efficiency and the efficiency of combustion close with coal-powder boiler, and have that fuel tolerance is wide, load adjustment ability good, lime-ash is easy to the advantages such as comprehensive utilization, therefore, obtained in the world business promotion rapidly.
Circulating fluid bed boiler desulfurization technique is a kind of Novel desulphurization technology developing rapidly in recent years, conventionally adopt to adding the desulfurizing agents such as lime stone in stove and realize desulfurization in burning, its operation principle is fuel and sends into bottom, combustion chamber as the agstone of absorbent, one time wind is sent into from air distribution plate, Secondary Air is sent into from middle part, combustion chamber, air-flow make fuel particle, agstone together with circulating ash in recirculating fluidized bed strong disturbance be full of combustion chamber, natural limestone is a kind of irregular structure of densification, and main component is CaCO
3, lime stone is decomposing in stove after calcining, CO in particle
2separate out CaCO
3particle just becomes the CaO particle of porous, porosity and specific area all have very big increase, in CaO particle due to the existence of a large amount of pores, and the increase greatly of surface area, be conducive on the one hand storage collection product, can make on the other hand reacting gas penetrate into granule interior and react, therefore greatly accelerate CaO and SO
2reaction generates CaSO
4chance, so the sulphur content in raw coal is just cured as calcium sulfate, enter in lime-ash, finally discharge bed, to reach the object of desulfurization.
The influence factor that adds calcium desulfurizing in fluidized bed combustion bed comprises Ca/S ratio, bed temperature, thickness of feed layer and fluidizing velocity, lime stone performance and limestone particle diameter; In the situation that CFB boiler engineering is certain, the respond of lime stone has determined to add the quantity of the lime stone of interpolation, and wherein the particle diameter of lime stone has great even conclusive impact to desulphurization reaction operating mode in bed.Lime stone preparation system makes the product of its grinding than other milling equipment, be more suitable for the production of CFB desulphurizer of boiler at aspects such as production capacity, fineness, grade distributions with its unique operation principle.Therefore one of key problem in technology that adopts at present desulfuration in furnace is exactly the pulverized coal preparation system of lime stone.
Summary of the invention
The object of the present invention is to provide a kind of economic, practical limestone milling system, a set ofly lump material can be finely ground to the limestone milling system of granular material, improve the reactivity of lime stone, to arrive the object of CFB boiler desulfurization.
For achieving the above object, the invention provides following technical scheme:
A kind of limestone milling system, after being pulverized, lime stone raw material in former hopper is delivered in finished powder storehouse, described limestone milling system comprises rod mill, and the finished product after rod mill is pulverized is delivered to the elevator in finished powder storehouse, between described former hopper and rod mill, be provided with double-deck rod gate and Weighing type batcher, lime stone raw material in described former hopper feeds described rod mill through double-deck rod gate and Weighing type batcher respectively, is provided with Double-hammer flap valve between the discharging opening of described rod mill and elevator.
Preferably, in above-mentioned limestone milling system, the air-introduced machine that the afterbody of described rod mill is provided with deduster and coordinates described deduster to arrange.
Preferably, in above-mentioned limestone milling system, between described deduster and rod mill, be provided with exhaust duct, on described exhaust duct, be provided with Hand-operated butterfly valve.
Preferably, in above-mentioned limestone milling system, on described exhaust duct, be also provided with device for pressure measurement.
Preferably, in above-mentioned limestone milling system, described finished powder storehouse is made by stainless steel.
Preferably, in above-mentioned limestone milling system, described finished powder storehouse is provided with gasification installation.
Preferably, in above-mentioned limestone milling system, described limestone milling system also comprises electric block, and described electric block provides abrasive body, maintenance bistrique or bearing for described rod mill.
Preferably, in above-mentioned limestone milling system, the bottom of described deduster is also provided with lock gas discharge valve.
Compared with prior art, the invention has the advantages that:
1, the particle property of rod milling product is relevant with the situation of rod milling broken ore.When bastinade hits ore, be first to beat coarse grain, then just grind less ore particle, thereby reduced, cross the danger of pulverizing.In rod turning and rising along liner plate, clip coarse grain therebetween, as bar screen, allow particulate pass through between excellent seam, this is also conducive to be caught broken coarse grain, and makes coarse grain concentrate on the place that milling medium hits.Therefore, the product of rod milling is more even, excessively pulverizes lighter.
2, system arranges simply, and without selecting powder equipment, security of system is reliable, and floor space is little, reduced investment.
3, system running environment is closed operation, non-secondary pollution
4, whole pulverized coal preparation system can operate separately, does not affect the normal operation of boiler after off-the-line.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in 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.
Figure 1 shows that the principle schematic of limestone milling system in the specific embodiment of the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is described in detail, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Shown in ginseng Fig. 1, limestone milling system, is delivered in finished powder storehouse 11 after the lime stone raw material in former hopper 1 is pulverized.Limestone milling system comprises rod mill 4, and the finished product after rod mill 4 is pulverized is delivered to the elevator 10 in finished powder storehouse 11, between former hopper 1 and rod mill 4, be provided with double-deck rod gate 2 and Weighing type batcher 3, lime stone raw material in former hopper 1 through double-deck rod gate 2 and Weighing type batcher 3 feeding rod mills 4, is provided with Double-hammer flap valve 8 between the discharging opening of rod mill 4 and elevator 10 respectively.
Grinding system is selected rod mill, when bastinade hits ore, is first to beat coarse grain, then just grinds less ore particle, thereby reduced, crosses the danger of pulverizing.In rod turning and rising along liner plate, clip coarse grain therebetween, as bar screen, allow particulate pass through between excellent seam, this is also conducive to be caught broken coarse grain, and makes coarse grain concentrate on the place that milling medium hits.Therefore, the product of rod milling is more even, excessively pulverizes lighter.
Weighing type batcher 3 is totally-enclosed Weighing type batcher, and lime stone raw material through the heavy belt feeder of 1 table scale evenly, stably feed in rod mill.The lime stone raw material entering in rod mill is discharged from grinding machine drawing mechanism after being pulverized, ground by abrasive body in grinding machine, enters bucket elevator, and the agstone after grinding is promoted to finished powder storehouse.
The air-introduced machine that the afterbody of rod mill is provided with pulsed jet cloth filter 9 and coordinates deduster to arrange, discharges the hot and humid gas of dust-laden in mill in time, to strengthen mill inner ventilation, improves grinding efficiency, makes dust emission meet the requirement of environmental protection simultaneously.
For regulating rod mill ventilation amount, on deduster exhaust duct, be provided with 1 bench-type Hand-operated butterfly valve 6.Pulsed jet cloth filter is arranged in grinding machine roof, and the dust of its collection is entered to finished powder storehouse.The bottom of deduster is also provided with lock gas discharge valve 7.
For interior negative pressure condition is ground in monitoring at any time, on mill tail exhaust duct, be provided with device for pressure measurement.
Finished powder storehouse is that discharge port need to be provided with loading system according to system or air-transport system transports or be delivered to power plant appointed place by finished powder.
Finished powder storehouse is generally ，Gang storehouse, steel storehouse cone and is provided with gasification installation, is beneficial to the discharging of powder storehouse, prevents powder storehouse putty.
Limestone milling system also comprises compressed air system, to provide sack cleaner winding-up use gas and carloader Pneumatic butterfly valve to control source of the gas.
1 electric block 5 is set for adding abrasive body and maintenance bistrique, mill tail base bearing in the Ball-mill-house.
Idiographic flow is as follows:
A, each equipment monomer debugging all complete, and each equipment monomer works well;
B, check that whether each equipment is in ready state, not ready equipment is adjusted to ready state;
C, inspection powder storehouse material level;
D, check that whether manually operated door is in on-station position everywhere.
When all conditions meets,
1) start deduster 9;
2) open elevator 10;
3) open rod mill 4;
4) open totally-enclosed Weighing type batcher 3;
5) detect the granularity of finished powder, be confirmed whether the abrasive body quantity in rod mill 4, if the granularity of finished powder is meticulous, need to reduce the abrasive body quantity in grinding machine, if the granularity of finished powder is excessively thick, need to increase the abrasive body quantity in grinding machine.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
The above is only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a limestone milling system, after being pulverized, lime stone raw material in former hopper is delivered in finished powder storehouse, it is characterized in that: described limestone milling system comprises rod mill, and the finished product after rod mill is pulverized is delivered to the elevator in finished powder storehouse, between described former hopper and rod mill, be provided with double-deck rod gate and Weighing type batcher, lime stone raw material in described former hopper feeds described rod mill through double-deck rod gate and Weighing type batcher respectively, is provided with Double-hammer flap valve between the discharging opening of described rod mill and elevator.
2. limestone milling system according to claim 1, is characterized in that: the air-introduced machine that the afterbody of described rod mill is provided with deduster and coordinates described deduster to arrange.
3. limestone milling system according to claim 2, is characterized in that: between described deduster and rod mill, be provided with exhaust duct, on described exhaust duct, be provided with Hand-operated butterfly valve.
4. limestone milling system according to claim 3, is characterized in that: on described exhaust duct, be also provided with device for pressure measurement.
5. limestone milling system according to claim 1, is characterized in that: described finished powder storehouse is made by stainless steel.
6. limestone milling system according to claim 1, is characterized in that: described finished powder storehouse is provided with gasification installation.
7. limestone milling system according to claim 1, is characterized in that: described limestone milling system also comprises electric block, and described electric block provides abrasive body, maintenance bistrique or bearing for described rod mill.
8. limestone milling system according to claim 1, is characterized in that: the bottom of described deduster is also provided with lock gas discharge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601925.7A CN103611616A (en) | 2013-11-25 | 2013-11-25 | Lime stone milling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310601925.7A CN103611616A (en) | 2013-11-25 | 2013-11-25 | Lime stone milling system |
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|---|---|
| CN103611616A true CN103611616A (en) | 2014-03-05 |
Family
ID=50162349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310601925.7A Pending CN103611616A (en) | 2013-11-25 | 2013-11-25 | Lime stone milling system |
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| CN (1) | CN103611616A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104689898A (en) * | 2015-03-13 | 2015-06-10 | 浙江拓翔建材有限公司 | Improved-structured slag powder grinding control system |
| CN104743162A (en) * | 2015-03-13 | 2015-07-01 | 浙江拓翔建材有限公司 | Mineral powder bagging transmitting device |
| CN104760712A (en) * | 2015-03-13 | 2015-07-08 | 浙江拓翔建材有限公司 | Mineral powder bagging production line |
| CN106179689A (en) * | 2016-09-09 | 2016-12-07 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system |
| CN106345593A (en) * | 2016-09-30 | 2017-01-25 | 中国电力工程顾问集团西南电力设计院有限公司 | Arrangement structure of preparation system for limestone powder and process flow |
| CN106513101A (en) * | 2016-12-14 | 2017-03-22 | 湖南绿生科技发展有限公司 | Crushing and grinding all-in-one machine for limestone |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN110371705A (en) * | 2019-09-02 | 2019-10-25 | 刘金江 | A kind of lime stone flouring technology oscillating feeder |
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| GB1324770A (en) * | 1970-07-02 | 1973-07-25 | Krupp Gmbh | Method for the grinding of coarse materials |
| JPH03187957A (en) * | 1989-12-15 | 1991-08-15 | Osaka Cement Co Ltd | Cement preparation apparatus provided with preliminarily grinding device |
| CN2391682Y (en) * | 1999-10-10 | 2000-08-16 | 孙荫棕 | Vibration rod mill |
| EP1640070A1 (en) * | 2004-09-22 | 2006-03-29 | Polysius AG | Apparatus and method for grinding material |
| CN101972696A (en) * | 2010-08-30 | 2011-02-16 | 天津精华石化有限公司 | Production system of desulfurized limestone powder in circulating fluidized bed (CFB) boiler |
| CN102580834A (en) * | 2012-02-28 | 2012-07-18 | 娄卡奔新能源科技发展(上海)有限公司 | Raw material proportioning and grinding safety logic control device |
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| CN203695172U (en) * | 2013-11-25 | 2014-07-09 | 镇江市电站辅机厂有限公司 | Limestone pulverizing system |
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2013
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1324770A (en) * | 1970-07-02 | 1973-07-25 | Krupp Gmbh | Method for the grinding of coarse materials |
| JPH03187957A (en) * | 1989-12-15 | 1991-08-15 | Osaka Cement Co Ltd | Cement preparation apparatus provided with preliminarily grinding device |
| CN2391682Y (en) * | 1999-10-10 | 2000-08-16 | 孙荫棕 | Vibration rod mill |
| EP1640070A1 (en) * | 2004-09-22 | 2006-03-29 | Polysius AG | Apparatus and method for grinding material |
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| CN103157543A (en) * | 2011-12-13 | 2013-06-19 | 洛阳宇航重工机械有限公司 | Alumina crust block crushing process and production line thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104689898A (en) * | 2015-03-13 | 2015-06-10 | 浙江拓翔建材有限公司 | Improved-structured slag powder grinding control system |
| CN104743162A (en) * | 2015-03-13 | 2015-07-01 | 浙江拓翔建材有限公司 | Mineral powder bagging transmitting device |
| CN104760712A (en) * | 2015-03-13 | 2015-07-08 | 浙江拓翔建材有限公司 | Mineral powder bagging production line |
| CN106925088A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of modified technique with white clay desulfurizing agent |
| CN106179689A (en) * | 2016-09-09 | 2016-12-07 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system |
| CN106345593A (en) * | 2016-09-30 | 2017-01-25 | 中国电力工程顾问集团西南电力设计院有限公司 | Arrangement structure of preparation system for limestone powder and process flow |
| CN106345593B (en) * | 2016-09-30 | 2019-09-13 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system arragement construction and process flow |
| CN106513101A (en) * | 2016-12-14 | 2017-03-22 | 湖南绿生科技发展有限公司 | Crushing and grinding all-in-one machine for limestone |
| CN110371705A (en) * | 2019-09-02 | 2019-10-25 | 刘金江 | A kind of lime stone flouring technology oscillating feeder |
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Application publication date: 20140305 |