CN106196133A - A kind of negative pressure coal dust preparation system - Google Patents
A kind of negative pressure coal dust preparation system Download PDFInfo
- Publication number
- CN106196133A CN106196133A CN201610546948.6A CN201610546948A CN106196133A CN 106196133 A CN106196133 A CN 106196133A CN 201610546948 A CN201610546948 A CN 201610546948A CN 106196133 A CN106196133 A CN 106196133A
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- Prior art keywords
- coal
- coal dust
- plate
- cabinet
- connects
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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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/20—Drying
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of negative pressure coal dust preparation system, relates to technical field of fuel preparation, for improving the drying efficiency of coal dust, improves the utilization rate of the energy.A kind of negative pressure coal dust preparation system, is characterized in that, including conveyer belt, run coal bin, feeder, coal pulverizer, dehydrator, receipts powder cabin and coal furnace；The discharging opening of coal pulverizer is communicated with described dehydrator；Described dehydrator includes that cabinet, the upper end of described cabinet are provided with coal powder entrance, and coal powder entrance connects with the discharging opening of described coal pulverizer, is fixedly connected with tabular exsiccator in described cabinet；Being rotatably connected to dispersing device in described cabinet, described cabinet is provided with bleeding point, described bleeding point is positioned at the lower section of dispersing device, and described bleeding point connects has centrifugal blower, the bottom of described cabinet to be communicated with receipts powder cabin.Provide the benefit that, coal dust can be avoided to be gathered into little granule, improve drying efficiency and the quality of coal dust.
Description
Technical field
The present invention relates to technical field of fuel preparation, specifically a kind of negative pressure coal dust preparation system.
Background technology
Burning coal obtains the energy, remains one of China's energy acquisition mode currently mainly, and its ratio accounts for respectively
Plant more than 50 the percent of energy total amount, therefore, promote the fossil energy clean and effectives such as coal to utilize, have emphatically in present stage
The meaning wanted.High-efficiency environment friendly coal dust boiler be country promote emphasis power-saving technology project, have energy-efficient, cleaning discharge,
Automatically talking about the features such as level height, environmental friendliness, economy, environmental protection, energy-saving benefit substantially, answer development popularization and application high-efficiency environment friendly
Pulverized-coal fired boiler, to promoting Coal Clean efficiently to utilize, improves atmospheric environment, and development energy-conserving and environment-protective industry has highly important meaning
Justice.
Owing to coal is containing certain moisture content, thus right in order to not affect coal dust combustion efficiency needs when in use
The coal dust prepared is dried process.In the prior art, the main heat utilizing the self-produced coal dust that burns to produce carries out coal
The work that powder is dried, and only dry coal dust and burning coal specially, thus cause the waste of the energy.Boiler of power plant produces
Flue-gas temperature still have 130 degrees centigrade, this portion, prior art is few to the UTILIZATION OF VESIDUAL HEAT IN mode of this partial fume, generally
It is directly discharged into after Bei Chuli in air, which results in the waste of the energy.
Meanwhile, conventionally, as coal dust has certain moisture content before it is dried, so easily occurring that coal dust is assembled
Becoming short grained phenomenon, little granule not only can affect dry rate and the drying effect of coal dust, and can affect normal combustion.
Summary of the invention
It is an object of the invention to provide a kind of negative pressure coal dust preparation system, for improving the drying efficiency of coal dust, improve
The utilization rate of the energy.
The present invention solves its technical problem and is adopted the technical scheme that: a kind of negative pressure coal dust preparation system, it is characterized in that,
Including conveyer belt, run coal bin, feeder, coal pulverizer, dehydrator, receipts powder cabin and coal furnace, the two ends up and down of described run coal bin are opened
Mouthful, the end of the stroke of described conveyer belt is positioned at the surface of the upper end open of run coal bin；
The lower ending opening of described run coal bin connects the charging aperture having feeder, and the discharging opening of described feeder is communicated with coal-grinding
The charging aperture of machine, the discharging opening of coal pulverizer is communicated with described dehydrator；
Described dehydrator includes that cabinet, the upper end of described cabinet are provided with coal powder entrance, coal powder entrance and described coal pulverizer
Discharging opening connection, described cabinet is fixedly connected with tabular exsiccator；
Described tabular exsiccator includes that several heat dissipation channels, described each heat dissipation channel are sequentially communicated, and is positioned at dissipating of stem
Being communicated with plate air inlet pipe in the passage of heat, be positioned on the heat dissipation channel of afterbody and be communicated with plate escape pipe, described coal furnace includes smoke evacuation
Mouthful, exhaust opening connects with described plate air inlet pipe, and described plate escape pipe connects with chimney, outside the heat dissipation channel that any two is adjacent
Wall constitutes blanking port, and described each blanking port is respectively in small top and big bottom tubaeform；
Being rotatably connected to dispersing device in described cabinet, dispersing device includes rotating shaft, described rotating shaft is fixedly connected with some
Breaing up plate, described plate of respectively breaing up extends the most in left-right direction, and described plate of respectively breaing up is uniformly distributed along the circumferencial direction of rotating shaft, institute
State rotating shaft to be driven by actuating unit；
Being provided with bleeding point on described cabinet, described bleeding point is positioned at the lower section of dispersing device, described bleeding point connect have from
Heart-wind syndrome machine, the bottom of described cabinet is communicated with receipts powder cabin.
Further, described rotating shaft includes axle air flue, and axle air flue runs through rotating shaft along the axis of described rotating shaft, described each beats
The inside fallen apart respectively includes an air chamber, and each air chamber connects with axle air flue respectively, and the import of axle air flue connects with described exhaust opening,
The outlet of axle air flue connects with described chimney.
Further, described exhaust opening includes exhaust opening attemperator, the import of described axle air flue and plate air inlet pipe respectively and
Exhaust opening attemperator connects.
Further, the quantity of plate is broken up between 5-8, including 5 and 8 described in.
Further, described dispersing device and described tabular exsiccator are respectively adopted metal material, described dispersing device and tabular
Exsiccator passes through wired earth respectively.
The invention has the beneficial effects as follows:
1, a kind of negative pressure coal dust preparation system that the present invention provides, under the effect of centrifugal blower, middle generation one in cabinet
Individual negative pressure, coal dust and extraneous gas that coal pulverizer is produced by negative pressure are drawn into cabinet from coal powder entrance, owing to blanking port is presented
Under great little tubaeform, so coal dust is through blanking port when coal dust can and tabular exsiccator be positioned at outside blanking port both sides
Wall contacts and collides, the position of bleeding point ensure that under the effect of pressure differential coal dust under move, thus ensure
Coal dust can collide with the outer wall of blanking port both sides, it is ensured that coal dust and can break up plate collision, and collide and both can accelerate coal
Granule can also be broken up by the moisture evaporation in powder, improves the quality of coal dust.Heat in each heat dissipation channel of tabular exsiccator
The drying work that flue gas is tabular exsiccator provides heat, so that the moisture evaporation in coal dust.Dispersing device be possible not only to by
Pulverized coal particle is broken up, and can be stirred by the even heat in cabinet, and due to pulverized coal particle and the density of drops of water vapor
Difference, so the centrifugal blower that is rotatably assorted of dispersing device is so that coal dust separates with gases such as steam under effect of inertia
Opening, the gas such as steam was said that centrifugal blower was extracted out and was given off cabinet, and centrifugal blower of the prior art can ensure that coal dust
Stay in cabinet 41 and air is extracted out.The flue gas using the coal furnace in electricity generation system to produce is used as drying in the present invention
Thermal source, improve the energy utilization rate.
2, described rotating shaft includes axle air flue, axle air flue runs through rotating shaft along the axis of described rotating shaft, described each plate of breaing up
Inside respectively includes an air chamber, and each air chamber connects with axle air flue respectively, and the import of axle air flue connects with described exhaust opening, axle air flue
Outlet connect with described chimney.Flue gas with heat is incorporated in each air chamber by axle air flue, so that each breaks up plate
With heat, be so conducive to the heat in cabinet sufficient, it is ensured that coal dust is fully dried, and meanwhile, each is broken up plate and gives out
Heat stirred evenly in the chassis by the rotary action of dispersing device, it is ensured that coal dust is full and uniform to be heated, it is ensured that the effect of drying, improve
The efficiency dried.
3, owing to coal dust firing can be caused the when that the flue-gas temperature of exhaust opening discharge reaching the burning-point of coal dust, thus cause
Explosion accident, so exhaust opening includes exhaust opening attemperator, the import of axle air flue and plate air inlet pipe respectively with exhaust opening attemperator
Connection, thus ensure the temperature entering into the flue gas in the dehydrator burning-point less than coal dust.
4, prove through practical effect, break up breaing up and the stirring when quantity of plate includes 5 and 8 between 5-8
The complex energy of even heat is optimal.
5, owing to can collide and CONTACT WITH FRICTION between tabular exsiccator and dispersing device meeting and coal dust, so easily producing
Electrostatic, and the spark as easy as rolling off a log initiation explosion accident that electrostatic produces, so the accident brought in order to avoid electrostatic, be dried tabular
Device and dispersing device are respectively adopted the material of metal, and use wire to carry out grounding respectively.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is the structural representation of dehydrator；
Fig. 3 is the structural representation of dispersing device；
In figure: 1 run coal bin, 11 conveyer belts, 2 feeders, 3 coal pulverizers, 4 dehydrators, 41 cabinets, 42 coal powder entrances, 43 plates
Shape exsiccator, 44 plate air inlet pipe, 45 plate escape pipes, 46 heat dissipation channels, 47 blanking ports, 48 bleeding points, 49 centrifugal blowers, 5 receive powder
Storehouse, 6 coal furnaces, 7 dispersing devices, 71 rotating shafts, 72 axle air flues, 73 break up plate, 74 air chambers, 75 motors, 76 driving gears, 77 driven tooth
Wheel, 8 chimneys, 81 exhaust opening attemperators.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
In order to simplify accompanying drawing, the pipeline straight line being used for connecting each technical characteristic in accompanying drawing replaces.
As it is shown in figure 1, a kind of negative pressure coal dust preparation system, including conveyer belt 11, run coal bin 1, feeder 2, coal pulverizer 3,
Dehydrator 4, receipts powder cabin 5 and coal furnace 6, the both ends open up and down of run coal bin 1, the end of the stroke of conveyer belt 11 is positioned at run coal bin
The surface of upper end open, used for conveyer belt in coal cinder being transported in run coal bin 1, the lower ending opening of run coal bin 1 connect have to
The charging aperture of coal machine 2, the discharging opening of feeder is communicated with the charging aperture of coal pulverizer 3, and the discharging opening of coal pulverizer is communicated with dehydrator
4, feeder 2 for delivering to coal pulverizer 3 by the coal cinder in run coal bin 1, and coal pulverizer 3 is by coal cinder grind into powder, and coal dust is delivered to dry
Dry machine 4 carries out drying and processing.
As depicted in figs. 1 and 2, dehydrator 4 includes that cabinet 41, the upper end of cabinet 41 are provided with coal powder entrance 42, and coal dust enters
Mouth 42 connects with the discharging opening of coal pulverizer 3, is fixedly connected with tabular exsiccator 43 in cabinet 41, and tabular exsiccator 43 includes some
Individual heat dissipation channel 46, each heat dissipation channel is sequentially communicated, and is positioned on the heat dissipation channel of stem and is communicated with plate air inlet pipe 44, is positioned at afterbody
Heat dissipation channel on be communicated with plate escape pipe 45, coal furnace 6 includes that exhaust opening, exhaust opening include exhaust opening attemperator 81, smoke evacuation
Mouth attemperator 81 connects with plate air inlet pipe 44, and plate escape pipe 45 connects with chimney, is provided with desulfurizer, any two in chimney
The outer wall of adjacent heat dissipation channel constitutes blanking port 47, and blanking port 47 is in small top and big bottom flared structure.
As shown in Figure 1 to Figure 3, being rotatably connected to dispersing device 7 in cabinet 41, dispersing device 7 includes rotating shaft 71, solid in rotating shaft 71
Fixed connect to have some break up plate 73, respectively break up the plate left and right directions shown in Fig. 2 respectively and extend, respectively break up the plate circumference along rotating shaft
Direction is uniformly distributed, and breaks up the quantity of plate between 5-8, and including 5 and 8, rotating shaft 71 is driven by actuating unit, this reality
Shi Li medium power mechanism is motor 75, fixed connection shaft driving gear 76 on motor, and driving gear engages with driven gear 77, from
Moving gear is fixedly connected in rotating shaft 71.Further, rotating shaft 71 includes that axle air flue, axle air flue 71 run through along the axis of rotating shaft 7
Rotating shaft, each inside breaing up plate 73 respectively includes an air chamber 74, and each air chamber connects with axle air flue respectively, the import of axle air flue with
Exhaust opening attemperator 81 connects, and the outlet of axle air flue connects with chimney 8.Bleeding point 48, bleeding point 48 it is provided with on cabinet 41
In the lower section of dispersing device 7, bleeding point 48 connects has centrifugal blower 49, the bottom of cabinet 41 to be communicated with receipts powder cabin 5.Dispersing device 7 He
Tabular exsiccator 43 is respectively adopted metal material, dispersing device and tabular exsiccator respectively by wired earth, owing to tabular is dried
Can collide and CONTACT WITH FRICTION between device 43 and dispersing device 7 meeting and coal dust, so easily producing electrostatic, and the fire that electrostatic produces
Spend as easy as rolling off a log initiation explosion accident, so the accident brought in order to avoid electrostatic, tabular exsiccator and dispersing device are respectively adopted
The material of metal, and use wire to carry out grounding respectively.
As shown in Figure 1 to Figure 3, under the effect of centrifugal blower 49, one negative pressure of middle generation in cabinet 41, negative pressure will mill
Coal dust and extraneous gas that coal machine 3 produces are drawn into cabinet from coal powder entrance 42, due to the loudspeaker that blanking port is big up and small down
Shape, so coal dust meeting is concurrent with the wall contacts that tabular exsiccator 43 is positioned at blanking port both sides coal dust is through blanking port when
Raw collision, the position of bleeding point ensure that under the effect of pressure differential coal dust under move, thus ensure that coal dust can
Collide with the outer wall of blanking port both sides, it is ensured that coal dust and can break up plate collision, and collides the moisture that both can accelerate in coal dust
Granule can also be broken up by evaporation, improves the quality of coal dust.Heat smoke in each heat dissipation channel of tabular exsiccator 43 is plate
The drying work of shape exsiccator provides heat, so that the moisture evaporation in coal dust.Dispersing device is possible not only to pulverized coal particle
Break up, and the even heat in cabinet can be stirred, and owing to pulverized coal particle is different with the density of drops of water vapor, so
Under effect of inertia, the centrifugal blower that is rotatably assorted of dispersing device is so that coal dust is separated with gases such as steam, steam etc.
Gas was said that centrifugal blower was extracted out and was given off cabinet, and centrifugal blower of the prior art can ensure that to be stayed coal dust in cabinet 41
And air is extracted out.Use the flue gas that the coal furnace in electricity generation system produces as the present invention is dried thermal source used, improve
The utilization rate of the energy.
Claims (5)
1. a negative pressure coal dust preparation system, is characterized in that, including conveyer belt, run coal bin, feeder, coal pulverizer, dehydrator, receipts
Powder cabin and coal furnace, the both ends open up and down of described run coal bin, the end of the stroke of described conveyer belt is positioned at the upper end of run coal bin
The surface of opening；
The lower ending opening of described run coal bin connects the charging aperture having feeder, and the discharging opening of described feeder is communicated with coal pulverizer
Charging aperture, the discharging opening of coal pulverizer is communicated with described dehydrator；
Described dehydrator includes that cabinet, the upper end of described cabinet are provided with coal powder entrance, and coal powder entrance goes out with described coal pulverizer
Material mouth connection, is fixedly connected with tabular exsiccator in described cabinet；
Described tabular exsiccator includes that several heat dissipation channels, described each heat dissipation channel are sequentially communicated, and the heat radiation being positioned at stem is led to
Being communicated with plate air inlet pipe on road, be positioned on the heat dissipation channel of afterbody and be communicated with plate escape pipe, described coal furnace includes exhaust opening, row
Mouth connects with described plate air inlet pipe, and described plate escape pipe connects with chimney, the outer wall structure of the heat dissipation channel that any two is adjacent
Becoming blanking port, described each blanking port is respectively in small top and big bottom tubaeform；
Being rotatably connected to dispersing device in described cabinet, dispersing device includes rotating shaft, and described rotating shaft is fixedly connected with some breaing up
Plate, described plate of respectively breaing up extends the most in left-right direction, and described plate of respectively breaing up is uniformly distributed along the circumferencial direction of rotating shaft, described turn
Axle is driven by actuating unit；
Being provided with bleeding point on described cabinet, described bleeding point is positioned at the lower section of dispersing device, and described bleeding point connects centrifugal wind
Machine, the bottom of described cabinet is communicated with receipts powder cabin.
A kind of negative pressure coal dust preparation system the most according to claim 1, is characterized in that, described rotating shaft includes axle air flue, axle
Air flue runs through rotating shaft along the axis of described rotating shaft, and described each inside breaing up plate respectively includes an air chamber, each air chamber respectively with
Axle air flue connects, and the import of axle air flue connects with described exhaust opening, and the outlet of axle air flue connects with described chimney.
A kind of negative pressure coal dust preparation system the most according to claim 2, is characterized in that, described exhaust opening includes that exhaust opening subtracts
Temperature device, the import of described axle air flue connects with exhaust opening attemperator respectively with plate air inlet pipe.
A kind of negative pressure coal dust preparation system the most according to claim 2, is characterized in that, described in break up the quantity of plate at 5-8
Between individual, including 5 and 8.
A kind of negative pressure coal dust preparation system the most according to claim 4, is characterized in that, described dispersing device and described tabular are done
Dry device is respectively adopted metal material, described dispersing device and tabular exsiccator and passes through wired earth respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546948.6A CN106196133B (en) | 2016-07-12 | 2016-07-12 | A kind of negative pressure coal dust preparation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546948.6A CN106196133B (en) | 2016-07-12 | 2016-07-12 | A kind of negative pressure coal dust preparation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106196133A true CN106196133A (en) | 2016-12-07 |
| CN106196133B CN106196133B (en) | 2018-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610546948.6A Expired - Fee Related CN106196133B (en) | 2016-07-12 | 2016-07-12 | A kind of negative pressure coal dust preparation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106196133B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233989A (en) * | 2017-07-10 | 2017-10-10 | 佛山市新祖陶瓷科技有限公司 | One kind dries the integrated Coal-disintegrating machine of mill torch firing |
| CN107314393A (en) * | 2017-08-03 | 2017-11-03 | 中国华冶科工集团有限公司 | Entering to have more feeding system micro- coal atomization boiler stokehold more |
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| DE2533914A1 (en) * | 1975-07-30 | 1977-02-10 | Ruhrkohle Ag | Multiple-hearth drier for fine particulate material - esp. for dewatering pulverised coking coal |
| JP2007255807A (en) * | 2006-03-24 | 2007-10-04 | Ube Machinery Corporation Ltd | Stirring dryer |
| CN102425929A (en) * | 2011-12-19 | 2012-04-25 | 许德海 | Roller plate delivery type bulk material drying machine and drying method |
| JP2013217588A (en) * | 2012-04-10 | 2013-10-24 | Hitachi Ltd | Method of drying low grade coal and thermal power plant using low grade coal as fuel |
| CN103604278A (en) * | 2013-12-05 | 2014-02-26 | 长安大学 | Mechanical dispersion fluidization drying method and equipment for coal slime |
| CN104930535A (en) * | 2015-06-12 | 2015-09-23 | 北京国电龙源环保工程有限公司 | Integrated direct-fired pulverizing system with coal drying and water recovery functions |
-
2016
- 2016-07-12 CN CN201610546948.6A patent/CN106196133B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2533914A1 (en) * | 1975-07-30 | 1977-02-10 | Ruhrkohle Ag | Multiple-hearth drier for fine particulate material - esp. for dewatering pulverised coking coal |
| JP2007255807A (en) * | 2006-03-24 | 2007-10-04 | Ube Machinery Corporation Ltd | Stirring dryer |
| CN102425929A (en) * | 2011-12-19 | 2012-04-25 | 许德海 | Roller plate delivery type bulk material drying machine and drying method |
| JP2013217588A (en) * | 2012-04-10 | 2013-10-24 | Hitachi Ltd | Method of drying low grade coal and thermal power plant using low grade coal as fuel |
| CN103604278A (en) * | 2013-12-05 | 2014-02-26 | 长安大学 | Mechanical dispersion fluidization drying method and equipment for coal slime |
| CN104930535A (en) * | 2015-06-12 | 2015-09-23 | 北京国电龙源环保工程有限公司 | Integrated direct-fired pulverizing system with coal drying and water recovery functions |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107233989A (en) * | 2017-07-10 | 2017-10-10 | 佛山市新祖陶瓷科技有限公司 | One kind dries the integrated Coal-disintegrating machine of mill torch firing |
| CN107233989B (en) * | 2017-07-10 | 2023-09-22 | 佛山市新祖陶瓷科技有限公司 | Baking, grinding, spraying and burning integrated coal powder machine |
| CN107314393A (en) * | 2017-08-03 | 2017-11-03 | 中国华冶科工集团有限公司 | Entering to have more feeding system micro- coal atomization boiler stokehold more |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106196133B (en) | 2018-02-23 |
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Granted publication date: 20180223 Termination date: 20200712 |