CN107131758A - A kind of rotary kiln coal mill system - Google Patents
A kind of rotary kiln coal mill system Download PDFInfo
- Publication number
- CN107131758A CN107131758A CN201710311911.XA CN201710311911A CN107131758A CN 107131758 A CN107131758 A CN 107131758A CN 201710311911 A CN201710311911 A CN 201710311911A CN 107131758 A CN107131758 A CN 107131758A
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- Prior art keywords
- coal
- rotary kiln
- coal mill
- air channel
- airduct
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000003245 coal Substances 0.000 title claims abstract description 148
- 239000000428 dust Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 21
- 230000008676 import Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 description 6
- 241000273930 Brevoortia tyrannus Species 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 during by 2013 Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
- F27B2007/3282—Details
- F27B2007/3294—Means to fluidise the charge in the air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a kind of rotary kiln coal mill system, including coal mill, coal mill is arranged between coal bunker and rotary kiln to be connected by pipeline, the rotary kiln coal mill system also includes powder concentrator, bag dust collector, Pulverized Coal Bin and four-air channel coal burner, coal mill is by pipeline successively through powder concentrator, bag dust collector, Pulverized Coal Bin and four-air channel coal burner are connected with rotary kiln, powder concentrator constitutes circulation loop by pipeline and coal mill, at least two Fans are provided with four-air channel coal burner, one is delivered coal by an air channel, other one is given the net wind in the other three air channel, pass through the bag dust collector and four-air channel coal burner of setting, improve yield and quality.
Description
Technical field
The present invention relates to field, more particularly to a kind of rotary kiln coal mill system.
Background technology
Rotary kiln specification is 1.9 × 2.2 × 44m of ￠, using the technique calcined after dry-type pulverizing raw ore, design yield 25t/
h.Operation initial stage, coal is all purchased from big colliery, and preferably, moisture is relatively low, and the monthly average unit-hour output of every kiln once reached for ature of coal
To 24.5t/h.Since 2003, progressively used with cheap place washing coal with the collocation of big factory's coal, during by 2013,
Coal consumption is washed more than 50%.Wash coal ature of coal poor, moisture is high, the need for can not meet rotary kiln sometimes, the operating of kiln
In most long only 185 days cycle, unit-hour output drops to less than 22.5t/h.
There is problems with the rotary kiln coal mill system used at present,
1) primary air flow of single in-duct burner accounts for more than the 20% of whole burning air quantity, subtracts the secondary air flow into kiln
It is few, enter kiln air bulk temperature relatively low；The wind coal mixed effect of single in-duct burner is poor, and the ignition time of coal dust is long, heating power point
Dissipate, coal dust firing not exclusively, wastes part energy, make clinker coal consumption increase.
2) fineness of pulverized coal regulation difficulty is big, former to adjust fineness of pulverized coal with mill separator, tails over ＞'s 5% when grinding 80 μm
During coal dust, requirement can be met；When ature of coal is poor, when need to grind 80 μm and tailing over ＜ 5% coal dust, separative efficiency reduction.
3) enter to grind air moisture content high, in the case where mill inner ventilation amount and temperature are certain, the drying capacity of coal mill declines.
One meet it is continuous rain, when entering to grind raw coal moisture and increasing, mill output is lower, unavoidable stifled mill.
4) burner and coal mill system influence each other, and the wind and First air back into bistrique will pass through circulating fan, often
Occurs the situation that coal mill is striven with wind and burner with wind facies, such case is especially prominent under the situation that cold kiln is lighted a fire.
5) rotary kiln thermal regulation is unstable, due to the influence of fineness of pulverized coal, kiln temperature inconvenience control, the kliner coating hung up
Extension difficulty is mended after firm poor flatness, kiln skin releasing big.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of rotary kiln coal mill system, by the bag dust collector of setting and
Four-air channel coal burner, improves yield and quality, to solve caused above-mentioned multinomial defect in the prior art.
To achieve the above object, the present invention provides following technical scheme：A kind of rotary kiln coal mill system, including coal mill
Machine, coal mill is arranged between coal bunker and rotary kiln to be connected by pipeline, and the rotary kiln coal mill system also includes powder concentrator, bag
Deduster, Pulverized Coal Bin and four-air channel coal burner, coal mill is by pipeline successively through powder concentrator, bag dust collector, Pulverized Coal Bin and four wind
Road burner is connected with rotary kiln, and powder concentrator is made up of pipeline and coal mill and is provided with circulation loop, four-air channel coal burner
At least two Fans, one is delivered coal by an air channel, gives the net wind in the other three air channel for one in addition.
It is preferred that, the four-air channel coal burner includes axle stream airduct, coal airduct and three clean wind pipes, coal airduct and clean wind pipe
One end be connected respectively with axle stream airduct, the other end of coal airduct is connected with blower fan and Pulverized Coal Bin；The other end of clean wind pipe
It is connected with blower fan.
It is preferred that, the axle stream airduct and clean wind pipe are provided with least one section metal bellows.
It is preferred that, also it is connected between clean wind pipe and axle the stream airduct by connecting tube.
It is preferred that, the end of the coal airduct of the four-air channel coal burner is provided with helicoidal pump, helicoidal pump respectively with Pulverized Coal Bin and
Blower fan is connected.
It is preferred that, the bag dust collector is circumscribed with exhaust blower.
It is preferred that, the fan outlet installs pressure gauge, safety valve and non-return valve.
It is preferred that, the coal mill import and export, powder concentrator import and export, run coal bin and each room of bag dust collector and ash bucket
It is designed with explosion-proof valve.
It is preferred that, the import and export of the coal mill and the import and export of bag dust collector are equipped with thermocouple.
Beneficial effect using above technical scheme is：The rotary kiln coal mill system of structure of the present invention, passes through the bag of setting
Deduster and four-air channel coal burner, rotary kiln yield ＞ 26t/h；Coal mill yield ＞ 11t/h；Fineness of pulverized coal is in 3%~10% model
Enclose interior random regulation；Coal dust moisture ＜ 1.5%；The service cycle of rotary kiln will reach more than 180d；Improve clinker quality.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structure chart of four-air channel coal burner；
Fig. 3 is the top view of four-air channel coal burner.
Wherein, 1-- coal mills, 2-- coal bunkers, 3-- rotary kilns, 4-- powder concentrators, 5-- bag dust collectors, 6-- Pulverized Coal Bins, 7--
Four-air channel coal burner, 8-- blower fans, 9-- axle streams airduct, 10-- coals airduct, 11-- clean wind pipes, 12-- metal bellows, 13-- connect
Adapter, 14-- helicoidal pumps, 15-- exhaust blowers, 16-- cold blast sliding valves, 17-- hot-blast valves.
Embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 shows the embodiment of the present invention：A kind of coal mill system of rotary kiln 3, including coal mill 1, coal mill 1 are set
Put and be connected between coal bunker 2 and rotary kiln 3 by pipeline, the coal mill system of rotary kiln 3 also includes powder concentrator 4, bag dust collector
5th, Pulverized Coal Bin 6 and four-air channel coal burner 7, coal mill 1 is by pipeline successively through powder concentrator 4, bag dust collector 5, the wind of Pulverized Coal Bin 6 and four
Road burner 7 is connected with rotary kiln 3, and powder concentrator 4 is made up of at circulation loop, four-air channel coal burner 7 pipeline and coal mill 1
Provided with least two Fans 8, one is delivered coal by an air channel, is given in addition outside the net wind in the other three air channel, bag dust collector 5 for one
It is connected to exhaust blower 15.
It is provided with the air inlet of coal mill 1 on cool air hose and warm-air pipe, cool air hose and warm-air pipe and is respectively equipped with cold blast sliding valve 16
With hot-blast valve 17.
Four-air channel coal burner 7 includes axle stream airduct 9, coal airduct 10 and three clean wind pipes 11, coal airduct 10 and clean wind pipe 11
One end be connected respectively with axle stream airduct 9, the other end of coal airduct 10 is connected with blower fan 8 and Pulverized Coal Bin 6；Clean wind pipe 11
The other end is connected with blower fan 8；Axle stream airduct 9 and clean wind pipe 11 are provided with least one section metal bellows 12；The He of clean wind pipe 11
Also it is connected between axle stream airduct 9 by connecting tube 13；The end of the coal airduct 10 of four-air channel coal burner 7 is provided with helicoidal pump 14,
Helicoidal pump 14 is connected with Pulverized Coal Bin 6 and blower fan 8 respectively.
Replace original single in-duct burner with four-air channel coal burner.
2 Fans are set up, blower fan is roots blower, and typhoon pressure is delivered coal up to 39.4kPa roots blower；Another typhoon pressure
Roots blower up to 29.4kPa is for 3 net wind.
The characteristics of former mill separator, the powder concentrator being substituted with CMS-30 powder concentrators：1. yield is high, and operating mode is wide；2. it is efficient
Energy-conservation, equipment resistance is small；3. simple to operate, fineness regulation is convenient；4. wear and tear small, maintenance cost is low.Powder concentrator fine powder separation effect
Rate ＞ 85%, improves more than 1 times, mill grinding efficiency is greatly improved than original mill separator efficiency, so as to improve coal mill
Yield.Fineness of pulverized coal can timely and effectively be controlled by changing rotor speed.
Coal mill bag dust collector is installed, the dusty gas come is ground from coal and does not reenter kiln, it is necessary to be up to standard after dust removal process
Discharge selection can handle the air box type pulse bag deduster of high concentration dusty gas.The deduster integrates chamber-dividing counter-blowing and injection arteries and veins
Rush the advantage of the class bag dust collector of deashing two, it is allowed to which gas dust content is up to 1000g/m3, and dusty gas is by primary dust removing
Just being capable of qualified discharge after reason.
Wind speed in new coal mill exhaust blower, new coal grinder process system mill is installed to improve, SR increase, original circulation
The air quantity and blast of blower fan can not meet requirement.From the blower fan substitution of exhaust air rate 33500m3/h, blast 9700Pa under mark condition
Circulating fan.Former circulating fan it is old on the basis of make steel bracket and fix new exhaust blower, so both shorten the duration, reduce again
Destruction to original civil engineering structure.
The measure of equipment safety operation is ensured,
Fan outlet installs pressure gauge, safety valve and non-return valve；Coal mill import and export, powder concentrator import and export, run coal bin and
Each room of bag dust collector and ash bucket are designed with explosion-proof valve；The import and export of coal mill and the import and export of bag dust collector are equipped with heat
Galvanic couple.
1) roots blower outlet is installed by pressure gauge, safety valve and non-return valve, it is ensured that roots blower operating pressure is in normal model
In enclosing.
2) import and export of coal mill, powder concentrator import and export, run coal bin and each room of deduster and ash bucket are designed with explosion-proof valve,
The safe handling of equipment can effectively be ensured.
3) to prevent coal dust from accumulating spontaneous combustion, flue-dust retainer angle increases by 5 ° on the basis of standard collector for duster ash bucket angle,
Improve the grey ability of anti-collection of ash bucket；The spontaneous combustion of pulverized coal caused by antistatic, dust-removal cloth-bag selects the terylene acupuncture Buddhist nun of antistatic.This
Class cloth bag circumferentially accompanies a fine wire at interval of 100mm, can eliminate the electrostatic of cloth bag generation；Deduster is done simultaneously
Grounding.
4) coal mill is imported and exported and deduster is imported and exported and is equipped with thermocouple.Coal mill imports and exports the safety that thermocouple ensures coal mill
Operating；Deduster imports and exports thermocouple and can ensure that gas temperature in control range, so that it is guaranteed that dust-collecting bag is not burned,
Do not condense paste bag.
Rotary kiln uses four-air channel coal burner, is drying the kiln stage, feeds coal amount and can be controlled in fairly small scope, effectively control
Temperature-rise period processed, beneficial to the use of rotary kiln clinkering zone magnesia brick；Stop kiln in case of provisional, when kiln temperature is relatively low, with less
Coal is with regard to that can light, it is to avoid " blowing out " phenomenon in former single channel burner ignition effectively protection equipment；Four-air channel coal burner is strong
Wind transmission coal is mixed, and improves burn-off rate, and flame profile and length adjustment easily, the need for seeing that firer can be according to kliner coating process be hung, are obtained
The heart answers the operation of hand, and the kliner coating hung up is firm smooth, easily mends and hangs after kiln skin releasing, can control preferable high temperature strip length, kiln
Interior heat is reasonably distributed, and thermal regulation is stable, and the fast rate of rotation of kiln is high.Coal mill uses independent exhaust blower, solves on mill wind and kiln
With wind it is uncoordinated the problem of.Grinder can adjust fineness of pulverized coal at any time according to produce reality, and coal mill yield is increased substantially.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection domain.
Claims (9)
1. a kind of rotary kiln coal mill system, including coal mill, coal mill is arranged between coal bunker and rotary kiln to be connected by pipeline
Connect, it is characterised in that the rotary kiln coal mill system also includes powder concentrator, bag dust collector, Pulverized Coal Bin and four-air channel coal burner, coal mill
Machine is connected through powder concentrator, bag dust collector, Pulverized Coal Bin and four-air channel coal burner with rotary kiln successively by pipeline, and powder concentrator passes through
Pipeline is constituted with coal mill and at least two Fans is provided with circulation loop, four-air channel coal burner, and one is delivered coal by an air channel,
Other one is given the net wind in the other three air channel.
2. rotary kiln coal mill system according to claim 1, it is characterised in that the four-air channel coal burner includes axle stream wind
One end of pipe, coal airduct and three clean wind pipes, coal airduct and clean wind pipe is connected with axle stream airduct respectively, the other end of coal airduct
It is connected with blower fan and Pulverized Coal Bin；The other end of clean wind pipe is connected with blower fan.
3. rotary kiln coal mill system according to claim 2, it is characterised in that the axle stream airduct and clean wind pipe are provided with
At least one section metal bellows.
4. rotary kiln coal mill system according to claim 2, it is characterised in that between clean wind pipe and axle the stream airduct also
It is connected by connecting tube.
5. rotary kiln coal mill system according to claim 2, it is characterised in that the coal airduct of the four-air channel coal burner
End is provided with helicoidal pump, and helicoidal pump is connected with Pulverized Coal Bin and blower fan respectively.
6. rotary kiln coal mill system according to claim 1, it is characterised in that the bag dust collector is circumscribed with exhaust blower.
7. rotary kiln coal mill system according to claim 1, it is characterised in that the fan outlet installs pressure gauge, peace
Full valve and non-return valve.
8. rotary kiln coal mill system according to claim 1, it is characterised in that the coal mill is imported and exported, powder concentrator enters
Outlet, run coal bin and each room of bag dust collector and ash bucket are designed with explosion-proof valve.
9. rotary kiln coal mill system according to claim 1, it is characterised in that the import and export and bag dedusting of the coal mill
The import and export of device are equipped with thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311911.XA CN107131758A (en) | 2017-05-05 | 2017-05-05 | A kind of rotary kiln coal mill system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311911.XA CN107131758A (en) | 2017-05-05 | 2017-05-05 | A kind of rotary kiln coal mill system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107131758A true CN107131758A (en) | 2017-09-05 |
Family
ID=59731623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710311911.XA Pending CN107131758A (en) | 2017-05-05 | 2017-05-05 | A kind of rotary kiln coal mill system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107131758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097388A (en) * | 2017-12-27 | 2018-06-01 | 唐山博全实业有限公司 | A kind of ball mill heating plant and heat supply method |
| CN109985717A (en) * | 2017-12-31 | 2019-07-09 | 北京蓝亚能源科技有限公司 | A safety protection system for high-efficiency pulverized coal preparation process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310299A (en) * | 1980-05-05 | 1982-01-12 | Coen Company, Inc. | Method for firing a rotary kiln with pulverized solid fuel |
| CN201344528Y (en) * | 2009-02-10 | 2009-11-11 | 山东赛博集团有限公司 | Four-channel burner |
| CN203298596U (en) * | 2013-05-09 | 2013-11-20 | 交城义望铁合金有限责任公司 | Pulverized coal ore burning system of rotary kiln |
| CN104326688A (en) * | 2014-09-28 | 2015-02-04 | 海拉尔蒙西水泥有限公司 | System and method for calcining cement clinker through lignite safely in large amount |
| CN206959568U (en) * | 2017-05-05 | 2018-02-02 | 淮北矿业（集团）有限责任公司 | A kind of rotary kiln coal mill system |
-
2017
- 2017-05-05 CN CN201710311911.XA patent/CN107131758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310299A (en) * | 1980-05-05 | 1982-01-12 | Coen Company, Inc. | Method for firing a rotary kiln with pulverized solid fuel |
| CN201344528Y (en) * | 2009-02-10 | 2009-11-11 | 山东赛博集团有限公司 | Four-channel burner |
| CN203298596U (en) * | 2013-05-09 | 2013-11-20 | 交城义望铁合金有限责任公司 | Pulverized coal ore burning system of rotary kiln |
| CN104326688A (en) * | 2014-09-28 | 2015-02-04 | 海拉尔蒙西水泥有限公司 | System and method for calcining cement clinker through lignite safely in large amount |
| CN206959568U (en) * | 2017-05-05 | 2018-02-02 | 淮北矿业（集团）有限责任公司 | A kind of rotary kiln coal mill system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097388A (en) * | 2017-12-27 | 2018-06-01 | 唐山博全实业有限公司 | A kind of ball mill heating plant and heat supply method |
| CN109985717A (en) * | 2017-12-31 | 2019-07-09 | 北京蓝亚能源科技有限公司 | A safety protection system for high-efficiency pulverized coal preparation process |
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Application publication date: 20170905 |