CN206959568U - A kind of rotary kiln coal mill system - Google Patents
A kind of rotary kiln coal mill system Download PDFInfo
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- CN206959568U CN206959568U CN201720496952.6U CN201720496952U CN206959568U CN 206959568 U CN206959568 U CN 206959568U CN 201720496952 U CN201720496952 U CN 201720496952U CN 206959568 U CN206959568 U CN 206959568U
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- rotary kiln
- coal mill
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Abstract
The utility model 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 forms 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
Field is the utility model is related to, 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 are all purchased from big colliery, and ature of coal is preferable, and moisture is relatively low, and the monthly average unit-hour output of every kiln once reached
To 24.5t/h.Since 2003, progressively arranged in pairs or groups and used with big factory's coal with cheap place washing coal, during by 2013,
Coal dosage is washed more than 50%.It is poor to wash coal ature of coal, moisture is high, can not meet the needs of rotary kiln, the operating of kiln sometimes
Cycle it is most long only 185 days, unit-hour output drops to less than 22.5t/h.
Problems be present in 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, it is relatively low to enter kiln air bulk temperature；The wind coal mixed effect of single in-duct burner is poor, the ignition time length of coal dust, heating power point
Dissipate, coal dust firing is incomplete, wastes part energy, makes 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, it can meet to require；When ature of coal is poor, need to grind 80 μm of coal dusts for tailing over ＜ 5%, separative efficiency reduces.
3) enter to grind air moisture content height, 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
The situation that coal mill is striven with wind and burner with wind facies occurs, such case is especially prominent under the situation of cold kiln igniting.
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
Firm poor flatness, mends that to hang difficulty big after kiln skin releasing.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of rotary kiln coal mill system, passes through the bag dedusting of setting
Device and four-air channel coal burner, yield and quality are improved, to solve caused above-mentioned multinomial defect in the prior art.
To achieve the above object, the utility model provides following technical scheme：A kind of rotary kiln coal mill system, including coal
Grinding machine, coal mill is arranged between coal bunker and rotary kiln to be connected by pipeline, the rotary kiln coal mill system also include 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
In-duct burner is connected with rotary kiln, and powder concentrator forms circulation loop by pipeline and coal mill, is set at four-air channel coal burner
There are 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.
Preferably, 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.
Preferably, the axle stream airduct and clean wind pipe are provided with least one section of metal bellows.
Preferably, also it is connected between clean wind pipe and axle the stream airduct by connecting tube.
Preferably, 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.
Preferably, the bag dust collector is circumscribed with exhaust blower.
Preferably, fan outlet installation pressure gauge, safety valve and the non-return valve.
Preferably, the coal mill inlet and outlet, powder concentrator inlet and outlet, run coal bin and each room of bag dust collector and ash bucket
It is designed with explosion-proof valve.
Preferably, the inlet and outlet of the coal mill and the inlet and outlet of bag dust collector are equipped with thermocouple.
Beneficial effect using above technical scheme is：The rotary kiln coal mill system of the utility model structure, passes through setting
Bag dust collector and four-air channel coal burner, rotary kiln yield ＞ 26t/h；Coal mill yield ＞ 11t/h；Fineness of pulverized coal 3%~
Arbitrarily adjusted in the range of 10%；Coal dust moisture ＜ 1.5%；The service cycle of rotary kiln will reach more than 180d；Improve clinker matter
Amount.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
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
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
Fig. 1 shows specific embodiment of the present utility model：A kind of coal mill system of rotary kiln 3, including coal mill 1, coal mill
Machine 1 is arranged between coal bunker 2 and rotary kiln 3 to be connected by pipeline, and the coal mill system of rotary kiln 3 also includes powder concentrator 4, bag removes
Dirt device 5, 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 and of Pulverized Coal Bin 6
Four-air channel coal burner 7 is connected with rotary kiln 3, and powder concentrator 4 forms circulation loop, the burning of four air channels by pipeline and coal mill 1
At least two Fans 8 are provided with device 7, one is delivered coal by an air channel, gives the net wind in the other three air channel, bag dedusting for one in addition
Device 5 is circumscribed with exhaust blower 15.
Cool air hose and warm-air pipe are provided with the air inlet of coal mill 1, cold blast sliding valve 16 is respectively equipped with cool air hose and warm-air pipe
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 of 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.
With the original single in-duct burner of four-air channel coal burner substitution.
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 supplies 3 net wind.
Former mill separator is substituted with CMS-30 powder concentrators, the characteristics of the powder concentrator：1. yield is high, operating mode is wide；It is 2. efficient
Energy-conservation, equipment resistance are small；3. simple to operate, fineness regulation is convenient；4. wearing small, maintenance cost is low.Powder concentrator fine powder separation effect
Rate ＞ 85%, more than 1 times is improved than original mill separator efficiency, mill grinding efficiency greatly improves, 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
The advantages of rushing two class bag dust collector of deashing, 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.
New coal mill exhaust blower is installed, wind speed improves in new coal grinder process system mill, SR increase, original circulation
The air quantity and blast of blower fan can not meet to require.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 installation pressure gauge, safety valve and non-return valve；Coal mill inlet and outlet, powder concentrator inlet and outlet, run coal bin and
Each room of bag dust collector and ash bucket are designed with explosion-proof valve；The inlet and outlet of coal mill and the inlet and outlet of bag dust collector are equipped with heat
Galvanic couple.
1) roots blower outlet installation pressure gauge, safety valve and non-return valve, it is ensured that roots blower operating pressure is in normal model
In enclosing.
2) coal mill inlet and outlet, powder concentrator inlet and outlet, 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 anti-collection ash ability of ash bucket；For 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 electrostatic caused by cloth bag；Deduster is done simultaneously
Grounding.
4) coal mill inlet and outlet and deduster inlet and outlet are equipped with thermocouple.Coal mill inlet and outlet thermocouple ensures the safety of coal mill
Operating；Deduster inlet and outlet thermocouple 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 can just be lighted, and avoid " blowing out " phenomenon in former single channel burner ignition effectively protection equipment；Four-air channel coal burner is strong
Wind transmission coal mixes, and improves burn-off rate, and flame profile and length adjustment are easy, sees that firer can obtain according to the needs for hanging kliner coating process
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 increases substantially.
Above-described is only preferred embodiment of the present utility model, it is noted that for the ordinary skill of this area
For personnel, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.
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 forms circulation loop with coal mill, and at least two Fans are provided with 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 of 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 installation 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 inlet and outlet, powder concentrator enter
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 inlet and outlet of the coal mill and bag dedusting
The inlet and outlet of device are equipped with thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720496952.6U CN206959568U (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 |
|---|---|---|---|
| CN201720496952.6U CN206959568U (en) | 2017-05-05 | 2017-05-05 | A kind of rotary kiln coal mill system |
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| Publication Number | Publication Date |
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| CN206959568U true CN206959568U (en) | 2018-02-02 |
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ID=61374588
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| CN201720496952.6U Active CN206959568U (en) | 2017-05-05 | 2017-05-05 | A kind of rotary kiln coal mill system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131758A (en) * | 2017-05-05 | 2017-09-05 | 淮北矿业（集团）有限责任公司 | A kind of rotary kiln coal mill system |
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- 2017-05-05 CN CN201720496952.6U patent/CN206959568U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131758A (en) * | 2017-05-05 | 2017-09-05 | 淮北矿业（集团）有限责任公司 | A kind of rotary kiln coal mill system |
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