CN104998726A - Coal mill for boiler - Google Patents

Coal mill for boiler Download PDF

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Publication number
CN104998726A
CN104998726A CN201510506117.1A CN201510506117A CN104998726A CN 104998726 A CN104998726 A CN 104998726A CN 201510506117 A CN201510506117 A CN 201510506117A CN 104998726 A CN104998726 A CN 104998726A
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CN
China
Prior art keywords
coal
mill
frame
boiler
controller
Prior art date
Application number
CN201510506117.1A
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Chinese (zh)
Inventor
钱根来
李康
魏鑫
夏守忠
陈微霞
丁亭
Original Assignee
芜湖奕辰模具科技有限公司
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Application filed by 芜湖奕辰模具科技有限公司 filed Critical 芜湖奕辰模具科技有限公司
Priority to CN201510506117.1A priority Critical patent/CN104998726A/en
Publication of CN104998726A publication Critical patent/CN104998726A/en

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Abstract

The invention discloses a coal mill for a boiler. The coal mill comprises a distributor, a dynamic separator, an upper frame body, a lower frame body and a base which are sequentially arranged from top to bottom, wherein a driving motor is arranged on the distributor; the distributor is in transmission connection with the driving motor; a rotary blade and a stationary blade are arranged in the dynamic separator; a refeed coal scuttle is arranged at the lower part of the dynamic separator; a loading rack and a pull rod are arranged below the refeed coal scuttle; the pull rod is arranged on one side of the loading rack; the loading rack is fixedly connected with the base through the pull rod; two grinding rollers are arranged on the inner side of a swinging and adjusting device; a motor is arranged on one side of the lower frame body; a speed reducer is arranged in the lower frame body. The coal mill for the boiler is compact in structure, stable in running, high in service efficiency and convenient to operate, can discharge dust during grinding to reduce pollution, and allows the diameter of ground coal powder to be adjusted.

Description

A kind of controller of coal mill of boiler

Technical field

The present invention relates to a kind of boiler accessory machinery technical field, particularly relate to a kind of controller of coal mill of boiler.

Background technology

Coal pulverizer is by coal crusher and wears into the machinery of coal dust, and it is the important auxiliary equipment of coal-powder boiler.There are the models such as vertical pulverizer, high-pressure overhang roll mill, middling speed micropowder grinding, super-pressure trapezoidal mill, Raymond mill.Coal-grinding process is that coal is broken and the ever-increasing process of surface area.Increase new surface area, the adhesion between molecular solids must be overcome, thus need consumed energy.Coal is ground into coal dust in coal pulverizer, mainly by crushing, smashing and grind three kinds of modes and carry out.The energy wherein crushing process consumption is economized most.Grinding process takes energy most.Various coal pulverizer all has two or three above-mentioned mode concurrently in pulverizing process, but which kind of is main then depending on the type of coal pulverizer with.

Low-speed coal mill is mainly drum-type low speed coal mill, general abbreviation Ball Mill or ball mill.It is cylindrical or two ends of rotating is the cylinder of taper, and cylinder is built with steel ball.The rotating speed of cylinder is 15 ~ 25 revs/min.Steel ball during work in cylinder constantly clashes into and extrudes coal cinder, and coal cinder is ground into coal dust.Then by the hot blast passed in cylinder by coal dry and coal dust is sent, through separator be separated after, the coal dust of certain particle size is admitted to Pulverized Coal Bin or directly sends into coal burner.Ball Mill bulky, power consumption are high, noise is large; But to the wide accommodation of coal, reliable, be particularly suitable for grinding hard anthracite.

Medium-speed pulverizer rotating speed is 50 ~ 300 revs/min, and kind is more.Common are square position mill, bowl shaped mill, E type mill and roller mill.Their common feature is that parts of milling are made up of the milling body of two groups of relative motions.Coal cinder is squeezed, mills and is pulverized between these two groups of milling body surfaces.Meanwhile, coal is dried by the hot blast passing into coal pulverizer, and is delivered to by coal dust and mill in the separator on top, district.After being separated, the coal dust of certain particle size is taken out of outside mill with air-flow, refaces in the coarse grained coal dust backspace district that mills.Medium-speed pulverizer has facility compact, it is little to take up an area, power consumption economize (being about 50 ~ 75% of low speed coal mill), noise little, run and control the lighter remarkable advantage such as sensitive; But structure is more complicated with manufacture, maintenance cost is comparatively large, and is not suitable for grinding harder coal.In considerable coal-fired boiler, bowl formula medium-speed pulverizer is used more.

High speed coal mill rotating speed is 500 ~ 1500 revs/min, primarily of high speed rotor and mill shell composition.Common are fan mill and hammer swing sledge mill etc.The high speed impact that coal cinder is subject to high speed rotor in fan mill collide with mill shell, and shock and being grated mutually between coal cinder.This coal pulverizer and coal dust classifier form a whole, and structure is simple, compact, and initial cost is economized, and are specially adapted to grind high water content brown coal and volatile matter is high, the bituminous coal that easily grinds.Fan mill is large owing to wearing and tearing, and continuous operating time is all short compared with other coal pulverizers, is unsuitable for grinding hard coal.

Coal pulverizer is after material is broken, then carries out the key equipment pulverized.Coal pulverizer is widely used in cement, silicate product, New Building Materials, refractory material, chemical fertilizer, black and the production industry such as non-ferrous metal ore and glass ceramics, carries out dry type or wet type grinding to various ore and other grindability material.Ball mill is Horizontal cylindrical whirligig, outer gear drive, two storehouses, grate ball mill.Material enters grinding machine first storehouse by feed arrangement equably through pan feeding quill shaft spiral, ladder lining board or corrugated liner is had in this storehouse, in-built different size steel ball, barrel body rotation produces after centrifugal force takes steel ball to certain altitude and falls, and produces bang and abrasive action to material.Material, after the first storehouse reaches corase grind, enters the second storehouse through single layer partition panel, studs with flat liner plate, inside has steel ball, ground further by material in this storehouse.Powder is discharged by discharging grate plate, completes grinding operation.Roller mill motor is rotated by reductor band movable grinding disc, and material drops on mill central authorities through lock feeding device from charging aperture, and hot blast enters in mill from air inlet simultaneously.Along with the rotation of mill, material under the influence of centrifugal force, move to mill edge, cannelure on mill is subject to rolling of grinding roller and pulverizes, material after pulverizing is taken up by vane high velocity air at mill edge, bulky grain directly to fall on mill grinding again, material in air-flow is through Upper separator, under the effect of rotor, meal falls mill grinding again from cone bucket, qualified fine powder trips out mill with air-flow one, collected by dust arrester installation, be product, material containing moisture with the contact process of thermal current in dried, by regulating hot blast temperature, different humidity material requirement can be met, reach required product moisture.By adjustment separator, the fineness degree needed for different product can be reached.Current existing coal pulverizer complex structure, operation stability is not high, easily produces dust.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of compact conformation, stable, and service efficiency is high, easy to operate, can discharge dust during grinding, reduces to pollute, and can regulate the controller of coal mill of boiler of the diameter of grinding powder coal.

For solving the problem, the present invention adopts following technical scheme:

A kind of controller of coal mill of boiler, comprise distributor, dynamic separator, upper frame, lower frame and base, described distributor, dynamic separator, upper frame, lower frame and base are arranged successively from top to bottom, described distributor is provided with drive motors, described distributor and drive motors are in transmission connection, rotating vane and stator blade is provided with in described dynamic separator, returning charge coal bunker is provided with below described dynamic separator, loading frame and pull bar is provided with below described returning charge coal bunker, described pull bar is located at loading frame side, described loading frame is fixedly connected with base by pull bar, described loading frame is provided with swing adjusting device, grinding roller is provided with inside described swing adjusting device, described grinding roller is provided with three, described lower frame side is provided with motor, reductor is provided with in described lower frame, described motor is connected with speed reducer drive, described reductor is provided with mill, described mill arranged outside has millstone sheet, described mill is connected with speed reducer drive, described mill is fixedly connected with millstone sheet, sealing ring is provided with bottom described upper frame, described upper frame side is provided with air intake vent.

As preferably, described grinding roller is that inclination angle is arranged, and increases milling area, promotes the grinding efficiency of coal cinder.

As preferably, described dynamic separator side is provided with sealing wind path pipe, facilitates the circulation of air, discharges dust.

As preferably, described pull bar is hydraulic pressure draw-bar, the position of adjustment loading frame that can be stable.

As preferably, described reductor is planet-gear speed reducer, keeps stable, reliable transmission.

As preferably, described motor and speed reducer is fixedly connected with base respectively, and holding structure is stablized.

As preferably, described grinding roller rolls with millstone sheet and is connected, and grinding effect can be kept good.

As preferably, described millstone sheet arranged outside has rotary spray nozzle ring, can spray into liquid, reduces the generation of dust.

The invention has the beneficial effects as follows: the distributor of setting can keep coal cinder raw material to pass into uniformly, dynamic separator can carry out precrushing to coal cinder, rotating vane carries out fragmentation to coal cinder, grinding roller and millstone sheet can grind coal cinder, ground coal dust can be discharged by returning charge coal bunker, air intake vent can enter air and take away dust and discharge from sealing wind path pipe, reduce to pollute, motor can keep mill to continue to rotate, reductor can regulate the rotating speed of mill, keep stable, service efficiency is high, easy to operate, pull bar can regulate the position of loading frame, thus regulate the gap of grinding roller and millstone sheet, the object regulating grinding powder coal diameter can be reached.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the structure chart of a kind of controller of coal mill of boiler of the present invention.

Detailed description of the invention

Consult shown in Fig. 1, a kind of controller of coal mill of boiler, comprise distributor 1, dynamic separator 2, upper frame 3, lower frame 4 and base 5, described distributor 1, dynamic separator 2, upper frame 3, lower frame 4 and base 5 are arranged successively from top to bottom, described distributor 1 is provided with drive motors 6, described distributor 1 is in transmission connection with drive motors 6, rotating vane 7 and stator blade 8 is provided with in described dynamic separator 2, returning charge coal bunker 9 is provided with below described dynamic separator 2, loading frame 10 and pull bar 11 is provided with below described returning charge coal bunker 9, described pull bar 11 is located at loading frame 10 side, described loading frame 10 is fixedly connected with base 5 by pull bar 11, described loading frame 10 is provided with and swings adjusting device 12, grinding roller 13 is provided with inside described swing adjusting device 12, described grinding roller 13 is provided with three, described lower frame 4 side is provided with motor 14, reductor 15 is provided with in described lower frame 4, described motor 14 is in transmission connection with reductor 15, described reductor 15 is provided with mill 16, described mill 16 arranged outside has millstone sheet 17, described mill 16 is in transmission connection with reductor 15, described mill 16 is fixedly connected with millstone sheet 17, sealing ring 18 is provided with bottom described upper frame 3, described upper frame 3 side is provided with air intake vent 19.

Described grinding roller 13 is arranged in inclination angle.

Described dynamic separator 2 side is provided with sealing wind path pipe 20.

Described pull bar 11 is hydraulic pressure draw-bar.

Described reductor 15 is planet-gear speed reducer.

Described motor 14 is fixedly connected with base 5 respectively with reductor 15.

Described grinding roller 13 rolls with millstone sheet 17 and is connected.

Described millstone sheet 17 arranged outside has rotary spray nozzle ring 21.

The invention has the beneficial effects as follows: the distributor of setting can keep coal cinder raw material to pass into uniformly, dynamic separator can carry out precrushing to coal cinder, rotating vane carries out fragmentation to coal cinder, grinding roller and millstone sheet can grind coal cinder, ground coal dust can be discharged by returning charge coal bunker, air intake vent can enter air and take away dust and discharge from sealing wind path pipe, reduce to pollute, motor can keep mill to continue to rotate, reductor can regulate the rotating speed of mill, keep stable, service efficiency is high, easy to operate, pull bar can regulate the position of loading frame, thus regulate the gap of grinding roller and millstone sheet, the object regulating grinding powder coal diameter can be reached.

The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any change of expecting without creative work or replacement; all should be encompassed within protection scope of the present invention; therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.

Claims (8)

1. a controller of coal mill of boiler, it is characterized in that: comprise distributor, dynamic separator, upper frame, lower frame and base, described distributor, dynamic separator, upper frame, lower frame and base are arranged successively from top to bottom, described distributor is provided with drive motors, described distributor and drive motors are in transmission connection, rotating vane and stator blade is provided with in described dynamic separator, returning charge coal bunker is provided with below described dynamic separator, loading frame and pull bar is provided with below described returning charge coal bunker, described pull bar is located at loading frame side, described loading frame is fixedly connected with base by pull bar, described loading frame is provided with swing adjusting device, grinding roller is provided with inside described swing adjusting device, described grinding roller is provided with three, described lower frame side is provided with motor, reductor is provided with in described lower frame, described motor is connected with speed reducer drive, described reductor is provided with mill, described mill arranged outside has millstone sheet, described mill is connected with speed reducer drive, described mill is fixedly connected with millstone sheet, sealing ring is provided with bottom described upper frame, described upper frame side is provided with air intake vent.
2. controller of coal mill of boiler according to claim 1, is characterized in that: described grinding roller is that inclination angle is arranged.
3. controller of coal mill of boiler according to claim 2, is characterized in that: described dynamic separator side is provided with sealing wind path pipe.
4. controller of coal mill of boiler according to claim 3, is characterized in that: described pull bar is hydraulic pressure draw-bar.
5. controller of coal mill of boiler according to claim 4, is characterized in that: described reductor is planet-gear speed reducer.
6. controller of coal mill of boiler according to claim 5, is characterized in that: described motor and speed reducer is fixedly connected with base respectively.
7. controller of coal mill of boiler according to claim 6, is characterized in that: described grinding roller rolls with millstone sheet and is connected.
8. controller of coal mill of boiler according to claim 7, is characterized in that: described millstone sheet arranged outside has rotary spray nozzle ring.
CN201510506117.1A 2015-08-18 2015-08-18 Coal mill for boiler CN104998726A (en)

Priority Applications (1)

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CN201510506117.1A CN104998726A (en) 2015-08-18 2015-08-18 Coal mill for boiler

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Application Number Priority Date Filing Date Title
CN201510506117.1A CN104998726A (en) 2015-08-18 2015-08-18 Coal mill for boiler

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105964342A (en) * 2016-06-27 2016-09-28 国家电网公司 Grinding roll and grinding disc clearance adjustable device of ZGM medium-speed mill
CN109126994A (en) * 2018-06-30 2019-01-04 湖州全优电工材料有限公司 A kind of combined type sandstone is broken and dedusting integrated device
CN109174320A (en) * 2018-09-10 2019-01-11 中国矿业大学 A kind of roller medium speed coal mill device
CN110740815A (en) * 2017-09-19 2020-01-31 三菱日立电力系统株式会社 Biomass grinding machine
CN110753583A (en) * 2017-06-30 2020-02-04 川崎重工业株式会社 Vertical roller mill and method for operating the vertical roller mill

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2887435Y (en) * 2006-05-08 2007-04-11 曹学志 Wet type middle speed grinding mill
CN101125306A (en) * 2007-10-09 2008-02-20 辽宁重机设备技术有限公司 Roller type medium speed mill
US20110114769A1 (en) * 2009-11-19 2011-05-19 Wark Rickey E Double course vane wheel
CN203196691U (en) * 2013-02-16 2013-09-18 四川皇龙智能破碎技术股份有限公司 Roller type medium-speed mill
CN103769274A (en) * 2014-02-20 2014-05-07 北京电力设备总厂 Coal mill
CN204448169U (en) * 2014-12-16 2015-07-08 中国航空技术北京有限公司 Roller-plate coal mill
CN104759412A (en) * 2015-04-21 2015-07-08 黑龙江迪科电站技术有限公司 Adjustable dynamic rotary separator for coal mill
CN205032229U (en) * 2015-08-18 2016-02-17 芜湖奕辰模具科技有限公司 Boiler coal mill

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2887435Y (en) * 2006-05-08 2007-04-11 曹学志 Wet type middle speed grinding mill
CN101125306A (en) * 2007-10-09 2008-02-20 辽宁重机设备技术有限公司 Roller type medium speed mill
US20110114769A1 (en) * 2009-11-19 2011-05-19 Wark Rickey E Double course vane wheel
CN203196691U (en) * 2013-02-16 2013-09-18 四川皇龙智能破碎技术股份有限公司 Roller type medium-speed mill
CN103769274A (en) * 2014-02-20 2014-05-07 北京电力设备总厂 Coal mill
CN204448169U (en) * 2014-12-16 2015-07-08 中国航空技术北京有限公司 Roller-plate coal mill
CN104759412A (en) * 2015-04-21 2015-07-08 黑龙江迪科电站技术有限公司 Adjustable dynamic rotary separator for coal mill
CN205032229U (en) * 2015-08-18 2016-02-17 芜湖奕辰模具科技有限公司 Boiler coal mill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105964342A (en) * 2016-06-27 2016-09-28 国家电网公司 Grinding roll and grinding disc clearance adjustable device of ZGM medium-speed mill
CN105964342B (en) * 2016-06-27 2018-06-29 国家电网公司 ZGM medium-speed pulverizers grinding roller and abrasive disk space tunable arrangement
CN110753583A (en) * 2017-06-30 2020-02-04 川崎重工业株式会社 Vertical roller mill and method for operating the vertical roller mill
CN110740815A (en) * 2017-09-19 2020-01-31 三菱日立电力系统株式会社 Biomass grinding machine
CN109126994A (en) * 2018-06-30 2019-01-04 湖州全优电工材料有限公司 A kind of combined type sandstone is broken and dedusting integrated device
CN109174320A (en) * 2018-09-10 2019-01-11 中国矿业大学 A kind of roller medium speed coal mill device

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Application publication date: 20151028