CN107726736A - A kind of method and system for drying coal slime - Google Patents
A kind of method and system for drying coal slime Download PDFInfo
- Publication number
- CN107726736A CN107726736A CN201711009200.3A CN201711009200A CN107726736A CN 107726736 A CN107726736 A CN 107726736A CN 201711009200 A CN201711009200 A CN 201711009200A CN 107726736 A CN107726736 A CN 107726736A
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- China
- Prior art keywords
- coal slime
- dryer
- coal
- machine
- slime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
- F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of method and system for drying coal slime, coal slime is loaded into coal slime after unloading and enters feed bin, the orlop that coal slime enters feed bin is dispersion machine, big block coal slime is broken up as fritter by machinery wherein, enter forming machine by the block coal slime quickly broken up, be formed as strip, tabular or granular shaping coal slime, high-temperature gas caused by hot-blast stove by certain pressure to draw through air-introduced machine, then enter dryer from dryer gas access.Shaping coal slime enters dryer from material inlet, with high-temperature gas contact heat-exchanging, partial moisture is evaporated, and becomes the drying coal slime of moisture content 5% or so, the waste gas containing water vapour is through bag filter by exhaust blower discharge system, and coal slime is dried by coal slime conveyer discharge system, as a result of the technique of first drying after forming, caused a large amount of dust after drying is avoided, environmentally friendly load is significantly mitigated, follow-up dryer is reduced due to radiating than rotary dryer, and the thermal efficiency also greatly improves.
Description
Technical field
The invention belongs to coal slime drying technology field, more particularly to a kind of method and system for drying coal slime.
Background technology
Routed weary with worldwide energy resources, fire coal is always that national governments are paid attention to as non-renewable resource.
With the quickening of coal industry mechanization degree, as coal and mining industry byproduct coal slime due to high-moisture, high viscosity,
Many unfavorable conditions such as high retentiveness and low heat value, commercial Application is difficult to realize, is kept outside of the door for a long time by power consumer, with civilian
Ground pin is main outlet.Before the eighties, coal slime is the main life fuel of ordinary people.For the ease of storing and using, one
As fill a small amount of loess with coal slime briquet and honeycomb briquette be made.
Since reform and opening-up, national economy has swift and violent development, and coal production has leapt to the first in the world, Market Situation
There occurs great changes.The depth and range of Coal dressing all substantially rise in fast development, the yield of coal slime, how to improve coal
The added value of mud, the problem of comprehensive utilization of coal slime turns into there is an urgent need to study.The coal slime arisen at the historic moment is dried industry and also obtained
Fast development is arrived.
Current coal slime drying mainly uses rotary drum drying machine, and the coal slime accumulated in rotating cylinder is exchanged heat with hot gas,
Dryer is taken out of so as to which the moisture in coal slime is become into vapor.The material of accumulation is low with the heat exchange efficiency of hot gas, thus turns
Cylinder drier is not really efficient coal slurry drying-machine.
Increasingly strict with environmental requirement, the environmental protection pressure that tumble drying machine production line faces is also increasing.
User's especially power consumer changes very greatly to coal slime usage amount, and the dosage when load is low is less than full production
When 20%.Neatly adjustment drying yield also turns into a kind of necessary.
The content of the invention
In order to overcome, the above-mentioned drying efficiency of rotary dryer in the prior art is low, adjustment yield is dumb, production wire loop
Low shortcoming is protected, it is an object of the invention to provide a kind of method and system for drying coal slime.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of method for drying coal slime, it is characterised in that dry two big steps including coal slime shaping and coal slime, coal slime is beaten
Aftershaping is dissipated, is then dried again.
The coal slime is initially charged with coal slime and enters feed bin after unloading, the orlop that coal slime enters feed bin has dispersion machine, fast by dispersion machine
The block coal slime that speed is broken up is obtained being molded coal slime into forming machine, and high-temperature gas caused by hot-blast stove is drawn through air-introduced machine, then from
Dryer gas access enters dryer, and shaping coal slime enters dryer from material inlet, with high-temperature gas contact heat-exchanging, part
Moisture evaporation, the waste gas containing water vapour is discharged through bag filter by exhaust blower, and is dried coal slime and discharged by coal slime conveyer.
The coal slime is the floating tail-coal of Oversized Coking Coal Cleaning Plant, the washing coal slime of thermal coal coal washery, coal Hydraulic transportation
Coal slime of output etc. afterwards, moisture content more than 15%.
The block coal slime chi footpath is not more than 10 centimetres.
The coal slime removes moisture in dryer and refers to that coal slime in continuous motion process, is higher than in dryer with temperature
200 DEG C of high-temperature gas directly contacts, and partial moisture therein can absorb heat and be evaporated to water vapour discharge.
The shaping coal slime moisture content is higher than 15%, different according to the type of forming machine, be coal slime round bar, coal slime thin plate or
Coal slime particle, the moisture content of the dry coal slime reach 5% or so.
The coal slime round bar diameter is more than 5 centimetres no more than 3 centimetres, length；The coal slime thin plate degree is not more than 3 centimetres,
Length and width is more than 5 centimetres；The coal slime particle diameter is not more than 5 centimetres.
The orlop for entering feed bin in coal slime is provided with dispersion machine, and the outlet of dispersion machine is connected with forming machine, the outlet of forming machine
It is connected with the material inlet of dryer, the outlet of the gas access connection air-introduced machine of dryer, the entrance connection hot blast of air-introduced machine
The high-temperature gas outlet of stove, the gas vent of dryer connect bag filter and exhaust blower, and the material outlet of dryer connects coal slime
Conveyer.
The dispersion machine is disintegrating machine or beater, and the forming machine is pan-pelletizer, extruder or harder, the drying
Machine is grate type drying machine, tower drier or carrier bar dryer.
The dryer is mounted on heat preserving and insulating material layer.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the present invention makes thermal current fully be contacted with coal slime, improves heat exchange area, because coal slime motion is slower, extends and changes
The hot time, so as to improve heat exchange efficiency.
2nd, the present invention can be by being adjusted into hot blast temperature, the hot blast rate of dryer, neatly adjustment drying yield.
3rd, the present invention is without large-scale rotating machinery, and plant maintenance is simple, maintenance cost is low.
4th, the present invention is carried out in negative pressure Sealing Arrangement, because gas-solid heat exchange is abundant, heat exchange efficiency is high, compared with the prior art
It is low, green with great yield height, heat consumption.
Brief description of the drawings
Fig. 1 is present system structural representation.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
A kind of method for drying coal slime, including coal slime shaping and coal slime dry two big steps, coal slime are broken up into aftershaping, so
Dried again afterwards.After coal slime shaping, avoid drying caused a large amount of dust, environmentally friendly load is significantly mitigated.Wherein, coal slime is
Coal slime of output etc., aqueous after the floating tail-coal of Oversized Coking Coal Cleaning Plant, the washing coal slime of thermal coal coal washery, coal Hydraulic transportation
Rate more than 15%.
As shown in figure 1, the system of present invention drying coal slime, including coal slime enter feed bin 1, the orlop that feed bin 1 is entered in coal slime is set
Dispersion machine 2 is equipped with, the outlet of dispersion machine 2 is connected with forming machine 3, and the outlet of forming machine 3 is connected with the material inlet of dryer 6,
The outlet of the gas access connection air-introduced machine 5 of dryer 6, the high-temperature gas outlet of the entrance connection hot-blast stove 4 of air-introduced machine 5, dries
The gas vent of dry machine 6 connects bag filter 8 and exhaust blower 9, and the material outlet of dryer 6 connects coal slime conveyer 7.
Using the system, the method and step for drying coal slime is as follows：
Coal slime is initially charged with coal slime and enters feed bin 1 after unloading, the chi footpath quickly broken up by dispersion machine 2 is not more than 10 centimetres of block
Shape coal slime enters forming machine 3 and obtains the shaping coal slime that moisture content is higher than 15%, and high-temperature gas is through air-introduced machine 5 caused by hot-blast stove 4
Draw, then enter dryer 6 from dryer gas access, shaping coal slime enters dryer 6 from material inlet, in dryer 6
In continuous motion process, 200 DEG C of high-temperature gas direct contact heat transfer is higher than with temperature, it is water that partial moisture, which absorbs heat of vaporization,
Steam, the waste gas containing water vapour are discharged through bag filter 8 by exhaust blower 9, and obtained moisture content is less than 15% and higher than 5%
Drying coal slime discharged by coal slime conveyer 7.
In the present invention, dispersion machine 2 is disintegrating machine or beater, and forming machine 3 is pan-pelletizer, extruder or harder.According to
The type of forming machine 3 is different, and shaped coal mud drum includes following several；By extruder by coal slime be squeezed into diameter no more than 3 centimetres,
Length is more than 5 centimetres of coal slime round bar；Coal slime is pressed into no more than 3 centimetres by thickness by harder, length and width is more than 5
Centimetre coal slime thin plate；Diameter made of logical pan-pelletizer, extruder etc. is not more than 5 centimetres of coal slime particle.
Dryer 6 is that grate type drying machine, tower drier or carrier bar dryer, dryer are respectively mounted heat preserving and insulating material,
Surface temperature is greatly reduced, and drying plant is greatly reduced and radiates the heat consumption to be formed.
Claims (10)
- A kind of 1. method for drying coal slime, it is characterised in that dry two big steps including coal slime shaping and coal slime, coal slime is broken up Aftershaping, then dried again.
- 2. the method for coal slime is dried according to claim 1, it is characterised in that the coal slime is initially charged with coal slime pan feeding after unloading Storehouse (1), the orlop that coal slime enters feed bin (1) have dispersion machine (2), and the block coal slime quickly broken up by dispersion machine (2) enters shaping Machine (3) is obtained being molded coal slime, and high-temperature gas caused by hot-blast stove (4) is drawn through air-introduced machine (5), then entered from dryer gas access Entering dryer (6), shaping coal slime enters dryer (6) from material inlet, and with high-temperature gas contact heat-exchanging, partial moisture is evaporated, Waste gas containing water vapour is discharged through bag filter (8) by exhaust blower (9), and is dried coal slime and discharged by coal slime conveyer (7).
- 3. the method for drying coal slime according to claim 1 or claim 2, it is characterised in that the coal slime is Oversized Coking Coal Cleaning Plant Coal slime of output etc., moisture content more than 15% after floating tail-coal, the washing coal slime of thermal coal coal washery, coal Hydraulic transportation.
- 4. the method for coal slime is dried according to claim 2, it is characterised in that the block coal slime chi footpath is not more than 10 lis Rice.
- 5. the method for coal slime is dried according to claim 2, it is characterised in that coal slime removing water in dryer (6) Divide and refer to that coal slime in continuous motion process, directly contacts in dryer (6) with high-temperature gas of the temperature higher than 200 DEG C, wherein Partial moisture can absorb heat and be evaporated to water vapour discharge.
- 6. the method for coal slime is dried according to claim 2, it is characterised in that the shaping coal slime moisture content is higher than 15%, It is different according to the type of forming machine (3), it is coal slime round bar, coal slime thin plate or coal slime particle, the moisture content of the dry coal slime exists 5% or so.
- 7. according to claim 6 dry coal slime method, it is characterised in that the coal slime round bar diameter no more than 3 centimetres, Length is more than 5 centimetres；The coal slime thin plate degree is not more than 3 centimetres, and length and width is more than 5 centimetres；The coal slime particle diameter No more than 5 centimetres.
- 8. a kind of system for drying coal slime, it is characterised in that enter feed bin (1) including coal slime, the orlop that feed bin (1) is entered in coal slime is set Dispersion machine (2) is equipped with, the outlet of dispersion machine (2) is connected with forming machine (3), the outlet of forming machine (3) and the material of dryer (6) Entrance connects, the outlet of the gas access connection air-introduced machine (5) of dryer (6), the entrance connection hot-blast stove (4) of air-introduced machine (5) High-temperature gas outlet, the gas vent of dryer (6) connects bag filter (8) and exhaust blower (9), the material of dryer (6) Outlet connects coal slime conveyer (7).
- 9. the system of coal slime is dried according to claim 8, it is characterised in that the dispersion machine (2) is disintegrating machine or broken up Machine, the forming machine (3) are pan-pelletizer, extruder or harder, and the dryer (6) is grate type drying machine, tower drier Or carrier bar dryer.
- 10. the system of coal slime is dried according to claim 8 or claim 9, it is characterised in that the dryer is mounted on thermal insulation separation Hot material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009200.3A CN107726736A (en) | 2017-10-25 | 2017-10-25 | A kind of method and system for drying coal slime |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009200.3A CN107726736A (en) | 2017-10-25 | 2017-10-25 | A kind of method and system for drying coal slime |
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| Publication Number | Publication Date |
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| CN107726736A true CN107726736A (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711009200.3A Pending CN107726736A (en) | 2017-10-25 | 2017-10-25 | A kind of method and system for drying coal slime |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534471A (en) * | 2018-04-13 | 2018-09-14 | 佛山市尚柏科技有限公司 | A kind of mud coal drying means |
| CN111998629A (en) * | 2020-08-31 | 2020-11-27 | 中国矿业大学 | Coal slime strip-making drying device and method |
| CN112812870A (en) * | 2021-01-06 | 2021-05-18 | 刘明锐 | Coal slime solidification upgrading process and device thereof |
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| CN103555383A (en) * | 2013-11-13 | 2014-02-05 | 河南理工大学 | Process of directly forming and utilizing coal slime of coal cleaning plant |
| CN103604278A (en) * | 2013-12-05 | 2014-02-26 | 长安大学 | Mechanical dispersion fluidization drying method and equipment for coal slime |
| US20160369194A1 (en) * | 2014-01-20 | 2016-12-22 | China University Of Mining And Technology | Integrated method and apparatus based on pulsating fluidization for lignite de-ashing and dehydration |
| CN207600060U (en) * | 2017-10-25 | 2018-07-10 | 西安华瑞联环保节能科技发展有限公司 | A kind of system for drying coal slime |
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| CN101463282A (en) * | 2007-12-21 | 2009-06-24 | 高恒 | Industrial briquette and technique for producing the same |
| CN101362975A (en) * | 2008-08-27 | 2009-02-11 | 秦孝志 | Molded coal using slime as raw material and preparation method thereof |
| US20120228197A1 (en) * | 2009-11-19 | 2012-09-13 | Gongmin Li | Integrated drying and dry separation apparatus for upgrading raw coal and method thereof |
| CN101792685A (en) * | 2010-02-27 | 2010-08-04 | 丹江口福安运输有限责任公司 | Method for pressing semicoke powder used for producing calcium carbide |
| CN103041745A (en) * | 2013-01-11 | 2013-04-17 | 蔡京鹏 | Powdered coal granulation method and equipment for lignite |
| CN103555383A (en) * | 2013-11-13 | 2014-02-05 | 河南理工大学 | Process of directly forming and utilizing coal slime of coal cleaning plant |
| CN103604278A (en) * | 2013-12-05 | 2014-02-26 | 长安大学 | Mechanical dispersion fluidization drying method and equipment for coal slime |
| US20160369194A1 (en) * | 2014-01-20 | 2016-12-22 | China University Of Mining And Technology | Integrated method and apparatus based on pulsating fluidization for lignite de-ashing and dehydration |
| CN207600060U (en) * | 2017-10-25 | 2018-07-10 | 西安华瑞联环保节能科技发展有限公司 | A kind of system for drying coal slime |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534471A (en) * | 2018-04-13 | 2018-09-14 | 佛山市尚柏科技有限公司 | A kind of mud coal drying means |
| CN111998629A (en) * | 2020-08-31 | 2020-11-27 | 中国矿业大学 | Coal slime strip-making drying device and method |
| CN111998629B (en) * | 2020-08-31 | 2021-09-21 | 中国矿业大学 | Coal slime strip-making drying device and method |
| CN112812870A (en) * | 2021-01-06 | 2021-05-18 | 刘明锐 | Coal slime solidification upgrading process and device thereof |
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Application publication date: 20180223 |