CN205481082U - Pulverized coal preparation system - Google Patents
Pulverized coal preparation system Download PDFInfo
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- CN205481082U CN205481082U CN201620079059.9U CN201620079059U CN205481082U CN 205481082 U CN205481082 U CN 205481082U CN 201620079059 U CN201620079059 U CN 201620079059U CN 205481082 U CN205481082 U CN 205481082U
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- powder
- coal dust
- coal
- sack cleaner
- preparation system
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Abstract
The utility model discloses a pulverized coal preparation system, this pulverized coal preparation system include heat source device, drying device, milling equipment, powder collector and air -blower, sack cleaner and draught fan, and drying device's smoke outlet end links to each other with the flue gas inlet of sack cleaner end, the smoke outlet end of sack cleaner links to each other with the draught fan, milling equipment is sent into to drying device's dry raw materials, forms the confined between milling equipment, powder collector, the air -blower and grinds circulation system, and still including balanced tuber pipe, the exit end of air -blower links to each other through the flue gas inlet end of balanced tuber pipe with the sack cleaner again. The utility model discloses the preparation system implementation the leak out full negative pressure operation of department of system, reach and clean the production purpose, the temperature of the powder is collected to the sack cleaner is reduced, reduced powder spontaneous combustion and explosion possibility, powder process system security is showing and is improving, compare with the traditional handicraft, reduced equipment figure and place, practiced thrift the cost.
Description
Technical field
This utility model belongs to powder body manufacture field, relates to a kind of coal dust preparation system with feed coal as raw material.
Background technology
Pulverized coal preparation refers to grind to form block raw coal the coal dust of certain fineness, to provide various pulverized-coal fired boiler, heating
The essential accessory such as stove, cement kiln, steel-making blast furnace.Typically by thermal source, raw coal conveyer, dehydrator, coal pulverizer, remove
Dirt device, blower fan, pulverized coal channel, airduct, chimney etc. are constituted.
As the auxiliary facility of pulverized coal combustion system, the powder coal milling system of compartmentalization construction has obtained quick utilization.
Especially with dry method pulverized coal preparation, coal dust store process, if pulverized coal preparation, store, transport in deal with improperly, the most easily pollute
, even there is powder process security incident, cause casualties and device damage in environment.
Spontaneous combustion of pulverized coal be because coal dust deposition, surface start oxidation, release heat promote elevate the temperature, again accelerated oxidation,
Heat release and intensification, reach burning-point and be concurrently conigenous combustion after certain time.For different coals, along with carrying of coal volatile matter
Height, the rising of fineness of pulverized coal, the increase of oxygen content, the probability of spontaneous combustion of pulverized coal increases.
The key element condition of coal dust explosion is: coal dust reaches certain particle size, has certain volatile matter, is dispersed into finite concentration
Suspended state, system has enough oxygen contents, has enough ignition energies it is possible to explode.I.e. combustible mass is dense
Spend, oxygen concentration reaches limit value and temperature reaches more than burning-point.The coal powder ignition point that volatile matter is high is relatively low, is more easy to reach combustion
Point；The thinnest specific surface area of granularity is the biggest, and the area contacted with oxygen is the biggest, more oxidizable；The lowest required ignition energy of moisture
Measure the lowest；Therefore, the coal dust that volatile matter is the highest, granularity is the thinnest, moisture is the lowest is more easy to explode.
Dry method flouring technology is divided into drying, coal-grinding integral type and drying, coal-grinding split two kinds.
The technical process that baking operation and coal-grinding operation unite two into one is: the general flue gas using thermal source to provide is directly entered
Coal pulverizer, dries in coal pulverizer and pulverizing is carried out simultaneously, and the coal dust of finished product gathers dust through dust-precipitator, and flue gas passes through circulated air
The power that machine provides, a part is again introduced into coal pulverizer after being mixed with thermal source flue gas by circulation airduct, forms one and closed circuit follow
Ring, another part is arranged to air by chimney.This technique is suitable for extensive powder process, and flow process is short, equipment is few, specific investment is little, peace
Full safeguard requires height.This technique suffers from the drawback that
(1) raw coal of high-moisture is likely to result in cloth bag condensation and sticks with paste bag；
(2) there may be spark when of coal pulverizer grinding powder coal, be a kind of potential safety hazard in hot environment；
(3) in order to prevent paste bag from often improving disintegrating outlet temperature, the temperature of coal dust is the highest simultaneously, to the conveying of coal dust
Certain security risk is brought with storing.
The process characteristic that baking operation and coal-grinding operation are divided into two is that baking operation separates with coal-grinding operation, in being suitable for
Powder process on a small scale, safety precautions is relatively easy, but flow process is slightly long, equipment is many, specific investment is slightly larger.Individually coal-grinding operation is shown in
Accompanying drawing 2, its general technological process is: the boosted equipment of raw coal enters coal pulverizer, and coal pulverizer, aerator, powder collector form one
Closed cycle, under the power that aerator provides, raw coal is ground in flour mill, and the coal dust of finished product is received in powder collector
Collection, the finished product coal dust in powder collector delivers to finished product storage tank through powder conveying device.Owing to system is in an air balance state, it is achieved
Leak out place negative pressure, the total blast volume of system will certainly be increased, thus must by leak out increase air quantity discharge system outside.Rousing
Fan outlet sets up balance wind pipe, and balance wind pipe outlet connects cloth bag powder collector, and the wind powder mixture that balance wind pipe is released exists
The heel row gathered dust in cloth bag powder collector, to air, thus achieves the negative pressure state at place of leaking out.Collected by cloth bag powder collector
Coal dust delivers to finished product storage tank through defeated powder equipment.When technique needs the low coal dust of moisture content, it is necessary for drying course and coal-grinding
Process combines, and sees accompanying drawing 3.The drying course flow process increased is: raw coal delivers to drying plant through raw coal conveyer device, is drying
The high-temperature flue gas provided by thermal source in dry equipment is dried, and enters after sack cleaner gathers dust through drawing after flue gas drying raw coal
Blower fan and chimney are arranged to air.If simply simply combining, the most just run into a following difficult problem:
(1) what sack cleaner was collected is the coal dust that carries of dehydrator exiting flue gas, and its fine size, moisture are low.Coal
Powder is the thinnest, and moisture content is the lowest, spontaneous combustion of pulverized coal, blast probability the biggest；
(2) balance wind pipe still sets up cloth bag powder collector, adds the complexity of system, and floor space is relatively big, investment
Cost uprises, and due to the limited height of gas discharge, the ambient temperature around powder process workshop also can rise；
(3) cloth bag powder collector collect coal dust need powder conveying device to carry, which increases system complexity and
Potential safety hazard；
(4) air quantity of balance wind pipe cannot regulate, it is impossible to system negative pressure according to actual needs regulates this parameter；
(5) owing to being not equipped with automatic ash removing device, the coal dust that cloth bag powder collector is collected needs artificial rapping to get off, workload
The biggest；
(6) along with the long-play of cloth bag powder collector, its resistance increases, and can cause balance wind pipe not in time if processing
Wind can not be discharged smoothly, causes the malleation at system air leakage, and coal dust pollutes environment outside escaping into system.
Utility model content
For defect of the prior art, this utility model purpose is to provide a kind of coal dust preparation system, solves existing
Cleanly production and the problem of raising security of system during dry process coal dust.
To achieve these goals, this utility model takes techniques below scheme:
A kind of coal dust preparation system, removes including heat power supply device, drying unit, milling device, powder collector and aerator, cloth bag
Dirt device and air-introduced machine, heat power supply device provides heat energy for drying unit, the smoke outlet of drying unit and the cigarette of sack cleaner
Gas entrance point is connected；The smoke outlet of sack cleaner is connected with air-introduced machine；Pulverizing dress sent into by the dry raw material of drying unit
Putting, the wind powder mixture port of export of milling device is connected with the wind powder mixture entrance point of powder collector, the wind powder mixing of powder collector
The thing port of export is connected with the entrance point of aerator, and the port of export of aerator is connected with the wind powder mixture entrance point of milling device,
Form the grinding blood circulation of closing between milling device, powder collector, aerator, also include balance wind pipe, the outlet of aerator
End is connected with the gas approach end of sack cleaner further through balance wind pipe.
Further, described balance wind pipe is provided with balance wind regulation valve.
Further, the outlet of described air-introduced machine is connected with chimney.
Further, the smoke outlet of described heat power supply device is connected with the entrance point of the flue gas of drying unit.
Further, also including raw coal screening bucket and raw coal conveyer device, raw coal screening bucket will by raw coal conveyer device
Coal sends into drying unit.
Further, also including elevator, the dry material outlet end of described drying unit is closed with elevator feed end
Connecting, elevator discharge end is closed with the charging aperture of milling device and is connected.
Further, also including powder conveying device A, powder conveying device B, powder conveying device C and powder-storage bin, powder conveying device A is by cloth bag
The coal dust of cleaner unit delivers to powder conveying device B, and the coal dust of powder collector also delivers to powder conveying device B, and the coal dust in powder conveying device B is given defeated
Coal dust is delivered to the coal dust in powder-storage bin, or powder conveying device B and the coal dust in powder conveying device C also by powder device C, powder conveying device C
Can deliver in powder-storage bin separately through powder conveying device.
Compared with prior art, this utility model has a following beneficial effect:
(1) ensure that the negative pressure of whole system, while eliminating the dust pollution in pulverizing process, sack cleaner is received
The coal dust moisture content of collection, granularity are more uniform, largely reduce the probability of spontaneous combustion of pulverized coal and blast, improve system
Safety；
(2) balance wind pipe sets up on sack cleaner, and original cloth bag powder collector just can omit, the receipts of balance wind pipe
Dirt is not required to another oil (gas) filling device, decreases cost and floor space, and system complexity reduces；The wind powder mixture of balance wind pipe gathers dust
Arranging to air by chimney, the height of smoke evacuation raises significantly, and surrounding working environment has had obvious improvement；
(3) balance wind pipe sets up on sack cleaner, and the device being originally used for carrying cloth bag powder collector coal dust can also
Omit, decrease the equipment of system, reduce the complexity of system；
(4) on balance wind pipe, add regulation valve, system negative pressure as required can carry out the size of adjustment air quantity.
Accompanying drawing explanation
The detailed description that example is made, other spy of the present utility model is executed with reference to the following drawings to non-limiting by reading
Levy, purpose and advantage will become more apparent upon:
Fig. 1 is the structural representation of coal dust preparation system in this utility model；
Fig. 2 is the schematic diagram of coal-grinding working procedure systems in prior art；
Fig. 3 is the schematic diagram of integration coal dust preparation system in prior art.
In figure: 1-raw coal screening bucket；2-raw coal conveyer device；3-heat power supply device；4-drying unit；5-elevator；6-grinds
Powder device；7-powder collector；8-aerator；9-balance wind pipe；10-balance wind regulation valve；11-sack cleaner；12-air-introduced machine；
13-chimney；14-powder conveying device A；15-powder conveying device B；16-powder conveying device C；17-powder-storage bin；18-cloth bag powder collector.
Detailed description of the invention
1 specifically execute example this utility model is described in detail below in conjunction with the accompanying drawings.It should be pointed out that, to this area
For those of ordinary skill, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement.These
Broadly fall into protection domain of the present utility model.
A kind of coal dust preparation system, including raw coal screening bucket 1, raw coal conveyer device 2, heat power supply device 3, drying unit 4, carries
Rise machine 5, milling device 6, powder collector 7 and aerator 8, sack cleaner 11, air-introduced machine 12, powder conveying device A14, powder conveying device
B15, powder conveying device C16 and powder-storage bin 17, coal is sent into drying unit 4, described heat by raw coal conveyer device by raw coal screening bucket 1
The smoke outlet of source apparatus 3 is connected with the entrance point of the flue gas of drying unit 4, the dry material outlet of described drying unit 4
Holding to close with elevator 5 feed end and be connected, elevator 5 discharge end is closed with the charging aperture of milling device 6 and is connected, milling device 6
The wind powder mixture port of export be connected with the wind powder mixture entrance point of powder collector 7, the wind powder mixture port of export of powder collector 7 with
The entrance point of aerator 8 is connected, and the port of export of aerator 8 is connected with the wind powder mixture entrance point of milling device 6, milling device
6, the grinding blood circulation of closing is formed between powder collector 7, aerator 8.The smoke outlet of drying unit 4 and sack cleaner
The gas approach end of 11 is connected；The smoke outlet of sack cleaner 11 is connected with air-introduced machine 12, the outlet of air-introduced machine 12 and cigarette
Chimney 13 is connected；The coal dust of sack cleaner 11 is delivered to powder conveying device B15 by powder conveying device A14, and the coal dust of powder collector 7 is also delivered to defeated
Powder device B15, the coal dust in powder conveying device B15 gives powder conveying device C16, powder conveying device C16 and coal dust delivered to powder-storage bin 17, or
Coal dust in person powder conveying device B15 and the coal dust in powder conveying device C16 can also deliver to powder-storage bin 17 separately through powder conveying device
In.
This utility model patent maximum feature is: also include balance wind pipe 9, and the port of export of aerator 8 is further through balance wind
Pipe 9 is connected with the gas approach end of sack cleaner 11.Described balance wind pipe 9 is provided with balance wind regulation valve 10.
Sack cleaner outlet is connected with air-introduced machine, by the effect of air-introduced machine, it is achieved following two effects:
(1) heat smoke in drying unit is evacuated to sack cleaner, heat smoke is discharged, and coal dust is stayed cloth bag removes
In dirt device；
(2) by milling device in balance wind pipe is evacuated to sack cleaner, gas is discharged, and coal dust is stayed cloth bag removes
In dirt device.
Accompanying drawing 1 system and accompanying drawing 2 systematic comparison, in pulverized coal preparation and coal dust stocking system, use and set up balance wind pipe
The biggest superiority is had to sack cleaner:
(1) i.e. ensure that whole system place of leaking out is completely in negative pressure state, the coal dust that sack cleaner is collected simultaneously contains
Water rate, granularity are more uniform, largely reduce the probability of spontaneous combustion and blast, improve the safety of system；
(2) equipment is simple, and floor space is few, and balance wind pipe, without bridge joint to cloth bag powder collector, is saved cloth bag powder collector, subtracted
Having lacked cost and floor space, system complexity reduces；The wind powder mixture of balance wind pipe is arranged to air through chimney after gathering dust,
The height of smoke evacuation raises significantly, and surrounding working environment has had obvious improvement；
(3) device being originally used for carrying cloth bag powder collector coal dust can also omit, and decreases the equipment of system, reduces
The complexity of system；
(4) on balance wind pipe, add balance wind regulation valve, system negative pressure as required can carry out the big of adjustment air quantity
Little.
The method that coal dust preparation system described in utilization carries out pulverized coal preparation is as follows:
Raw coal sends into drying unit 4, the heat smoke that heat power supply device 3 is delivered to through raw coal screening bucket 1 and raw coal conveyer device 2
Drying raw coal, the flue gas after drying is drawn onto sack cleaner 11 by air-introduced machine 13 and gathers dust, then through chimney 13 row
To air；Flour mill 6 delivered to by the boosted machine of raw coal 5 dried, and the power cycle provided by aerator 8 is ground, and major part is closed
The fine coal of lattice is collected in cyclone separator 7, and underproof fine coal carries out regrinding in falling flour mill 6, until closing
Till lattice；The most qualified fine coal enters aerator 8 entrance, the balance wind pipe 9 that aerator 8 exit sets up, wind powder mixture
Deliver to sack cleaner 11 through this airduct gather dust, trap the coal dust that carries of coal dust and dehydrator flue gas mix
Closing, the coal dust of sack cleaner 11 is delivered to powder conveying device B15 by powder conveying device A14, and the coal dust of powder collector 7 also delivers to powder conveying device
B15, the coal dust in powder conveying device B15 is given powder conveying device C16, powder conveying device C16 and coal dust is delivered to powder-storage bin 17, or defeated powder
Coal dust in device B15 and the coal dust in powder conveying device C16 can also be delivered in powder-storage bin 17 separately through powder conveying device.
Above specific embodiment of the utility model is described.It is to be appreciated that this utility model not office
Being limited to above-mentioned particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims,
This has no effect on flesh and blood of the present utility model.
Claims (7)
1. a coal dust preparation system, including heat power supply device (3), drying unit (4), milling device (6), powder collector (7) and drum
Blower fan (8), sack cleaner (11) and air-introduced machine (12), heat power supply device (3) is that drying unit (4) provides heat energy, drying unit
(4) smoke outlet is connected with the gas approach end of sack cleaner (11)；The smoke outlet of sack cleaner (11) with
Air-introduced machine (12) is connected；Milling device (6) sent into by the dry raw material of drying unit (4), and the wind powder mixture of milling device (6) goes out
Mouth end is connected with the wind powder mixture entrance point of powder collector (7), the wind powder mixture port of export of powder collector (7) and aerator (8)
Entrance point be connected, the port of export of aerator (8) is connected with the wind powder mixture entrance point of milling device (6), milling device
(6) the grinding blood circulation of closing, is formed between powder collector (7), aerator (8), it is characterised in that also include balance wind pipe
(9), the port of export of aerator (8) is connected further through the gas approach end of balance wind pipe (9) with sack cleaner (11).
A kind of coal dust preparation system the most according to claim 1, it is characterised in that described balance wind pipe (9) is provided with flat
Weighing apparatus wind regulation valve (10).
A kind of coal dust preparation system the most according to claim 1, it is characterised in that the outlet of described air-introduced machine (12) and cigarette
Chimney (13) is connected.
A kind of coal dust preparation system the most according to claim 1, it is characterised in that the flue gas of described heat power supply device (3) goes out
Mouth end is connected with the entrance point of the flue gas of drying unit (4).
A kind of coal dust preparation system the most according to claim 1, it is characterised in that also include raw coal screening bucket
(1) and raw coal conveyer device (2), coal is sent into drying unit (4) by raw coal conveyer device (2) by raw coal screening bucket (1).
A kind of coal dust preparation system the most according to claim 1, it is characterised in that also include elevator (5), described drying
The dry material outlet end of device (4) is closed with elevator (5) feed end and is connected, elevator (5) discharge end and milling device (6)
Charging aperture close connect.
A kind of coal dust preparation system the most according to claim 1, it is characterised in that also include powder conveying device A(14), defeated powder
Device B(15), powder conveying device C(16) and powder-storage bin (17), powder conveying device A(14) coal dust of sack cleaner (11) is delivered to defeated
Powder device B(15), the coal dust of powder collector (7) also delivers to powder conveying device B(15), powder conveying device B(15) in coal dust give defeated powder
Device C(16), powder conveying device C(16) coal dust delivered to powder-storage bin (17), or powder conveying device B(15) and in coal dust and defeated powder dress
Put C(16) in coal dust deliver in powder-storage bin (17) separately through powder conveying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620079059.9U CN205481082U (en) | 2016-01-27 | 2016-01-27 | Pulverized coal preparation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620079059.9U CN205481082U (en) | 2016-01-27 | 2016-01-27 | Pulverized coal preparation system |
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| Publication Number | Publication Date |
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| CN205481082U true CN205481082U (en) | 2016-08-17 |
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ID=56619757
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| CN201620079059.9U Active CN205481082U (en) | 2016-01-27 | 2016-01-27 | Pulverized coal preparation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627345A (en) * | 2016-01-27 | 2016-06-01 | 广东海洋大学 | Pulverized coal preparation system and pulverized coal preparation method |
| CN106439885A (en) * | 2016-09-28 | 2017-02-22 | 江苏省冶金设计院有限公司 | Raw coal direct blowing type pulverizing device |
| CN110404651A (en) * | 2019-07-04 | 2019-11-05 | 国能绿色能源股份有限公司 | A kind of security system and its method ensureing pulverized coal preparation process |
-
2016
- 2016-01-27 CN CN201620079059.9U patent/CN205481082U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627345A (en) * | 2016-01-27 | 2016-06-01 | 广东海洋大学 | Pulverized coal preparation system and pulverized coal preparation method |
| CN106439885A (en) * | 2016-09-28 | 2017-02-22 | 江苏省冶金设计院有限公司 | Raw coal direct blowing type pulverizing device |
| CN110404651A (en) * | 2019-07-04 | 2019-11-05 | 国能绿色能源股份有限公司 | A kind of security system and its method ensureing pulverized coal preparation process |
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