CN106369937A - Coal slime drying system and drying technique thereof - Google Patents
Coal slime drying system and drying technique thereof Download PDFInfo
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- CN106369937A CN106369937A CN201610935128.6A CN201610935128A CN106369937A CN 106369937 A CN106369937 A CN 106369937A CN 201610935128 A CN201610935128 A CN 201610935128A CN 106369937 A CN106369937 A CN 106369937A
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- coal slime
- coal
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- 239000003245 coal Substances 0.000 title claims abstract description 296
- 238000001035 drying Methods 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002245 particle Substances 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 15
- 239000002817 coal dust Substances 0.000 claims description 12
- 229920006395 saturated elastomer Polymers 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007791 dehumidification Methods 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 19
- 239000003546 flue gas Substances 0.000 description 19
- 239000008187 granular material Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
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- 239000000779 smoke Substances 0.000 description 1
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- 238000009834 vaporization Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
-
- 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
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/50—Blending
- F23K2201/501—Blending with other fuels or combustible waste
Abstract
The invention provides a coal slime drying system and a drying technique thereof. The coal slime drying system comprises a coal slime breaker, a drying beater and a pulverized coal collection device. The inlet end of the coal slime breaker is used for receiving wet coal slime. The outlet end of the coal slime breaker is used for being connected with the inlet end of the drying beater. The drying beater is provided with an air inlet. The outlet end of the drying beater is connected with the pulverized coal collection device.
Description
Technical field
The present invention relates to wet coal slime technical field of drying, more particularly, to a kind of coal slime drying system and its drying process.
Background technology
Coal slime is the side-product that coal preparation plant produces during coal washing, and it has high moisture content, high viscosity, high retentiveness
And the characteristic such as low heat value, commercial Application therefore relatively difficult to achieve, kept outside of the door by power consumer for a long time, except fraction is applied to the people
With outer, remaining major part is used to coal slurry boiler combustion power generation or piles up for waste.
At present, power plant, all using the method mixing burning when using above-mentioned coal slime, coal slime and coal dust will carry out mixed combustion,
But because coal slime moisture content height, poor fluidity, calorific value are low, it usually brings operating difficultiess to boiler operatiopn, reduces boiler combustion
Efficiency.Therefore, bring excessive moisture content in order to avoid coal slime and enter boiler, need first to be dried coal slime, dried coal
Mud enters boiler combustion again together with other feed coals, because dried coal slime water content is low, uniform particle sizes, calorific value also can be relatively
The raising of big degree.
Domestic high temperature flue gas drying technology and low-temperature steam drying technology are broadly divided into for coal slime dry technology, wherein:
(1) high temperature flue gas drying technology is dried to coal slime in revolving drum drier using high-temperature flue gas, utilizes
The system structure of high temperature flue gas drying technology mainly by heat resource equipment, break up feed bin, belt material-feeding machine, conveying worm, revolution
Drum drier, drive mechanism, discharger, air-introduced machine, cleaner and electric-control system are constituted, but high temperature flue gas drying technology
Have that energy consumption is big, waste of resource, simultaneously more serious to the damage ratio of environment, and high-temperature hot-air temperature reaches 500～700 DEG C,
Therefore also there is the danger of blast in misoperation.
(2) low-temperature steam drying technology is vaporization latent heat using residual heat of electric power plant steam and the energy-saving ring of coal slime is dried
Guarantor's technology, the moisture of coal slime evaporation can be recycled by heat transmission equipment.Drying using low-temperature steam drying technology
System mainly by break up feed bin, belt material-feeding machine, conveying worm, steam drying equipment, drive mechanism, discharger, air-introduced machine,
Cleaner and electric-control system are constituted.But although cold drying technology solves the problems, such as waste of resource, its equipment volume
Greatly, weight is big, floor space is big, and therefore costly, in addition cold drying technical equipment is due to depositing for Factory Building and infrastructure investment
The reason such as in complex process and limited by Low Temperature Steam source, is therefore unable to large-scale use.
Content of the invention
In order to overcome the defect of prior art, it is an object of the invention to provide a kind of coal slime drying system and its back tender
Skill, to be thoroughly dried to coal slime and to pulverize so as to meet the requirement of industrial application.
Embodiments provide a kind of coal slime drying system, comprising: coal slime breaker, drying beater and coal dust are received
Collection equipment, wherein:
The entrance point of described coal slime breaker is used for receiving wet coal slime, the port of export of described coal slime breaker and described drying
The entrance point of beater connects；Air inlet offered on described drying beater, the port of export of described drying beater with described
Coal powder collection equipment connects.
Preferably, described system also includes material separator, wherein:
The entrance point of described material separator is connected with the described port of export drying beater, and the of described material separator
One port of export is connected with the described entrance point drying beater, the second outlet end of described material separator and described coal powder collection
Equipment connects.
Preferably, described coal powder collection equipment includes cyclone separator and sack cleaner, wherein:
The entrance point of described cyclone separator is connected with the port of export of described material separator, the going out of described cyclone separator
Mouth end is connected with the entrance point of described sack cleaner.
Preferably, described system also includes air-introduced machine, wherein:
Described air-introduced machine is connected with the port of export of described bag dust collector.
Preferably, described system also includes coal slime surge bunker and screw(-type) feeder, wherein:
The outlet of described coal slime surge bunker is connected with the entrance point of described screw(-type) feeder, the outlet of described screw(-type) feeder
End is connected with the entrance point of described coal slime breaker.
Preferably, described system also includes: plate type heat exchanger, wherein:
The heat of normal temperature air and thermal wastewater/vapourss is swapped by described plate type heat exchanger, and normal temperature air is changed
For being delivered to drying beater after Cryogenic air.
Preferably, described drying beater includes: discharge valve, the discharge end of described discharge valve is connected with feed pipe, described
Feed pipe is connected to form one with dry air blast pipe, in described feed pipe and dry air blast pipe the port of export all with broken
The connection of broken chamber, is provided for breaing up mechanism to the rotation of coal slime fast-crushing, in described crusher chamber inside described crusher chamber
Also connect saturated air discharge pipe, discharge nozzle is opened in saturated air discharge pipe middle section, in described crusher chamber and saturated air
The junction of discharge pipe, described broken intracavity also set up prevent bulky grain comminuting matter flow out discharge nozzle grading plant.
Preferably, the backgauge rod that described grading plant is arranged in the horizontal direction by multirow forms, between each backgauge rod each other
Arranged for interval.
Preferably, described rotation is broken up mechanism and is hammered into shape for rotor, and described rotor hammer is rotated by mair motor control.
Preferably, the side wall in described feed pipe also sets up observation port.
Preferably, described dry air blast pipe is also connected with air heat humidity equipment.
The embodiment of the present invention is additionally provided and a kind of using aforementioned arbitrary described coal slime drying system, coal slime is dried
Technique it is characterised in that: described technique includes:
S1, by wet coal slime send into coal slime breaker after carry out precrushing；
Wet coal slime after s2, precrushing is admitted in drying beater and carries out drying and break up, and forms pulverized coal particle；
S3, pulverized coal particle are admitted to coal powder collection equipment and carry out coal dust recovery.
Preferably, described pulverized coal particle is admitted to coal powder collection equipment and carries out separating, comprising:
After described pulverized coal particle is admitted to material separator, particle diameter is more than the coal dust of 0.5mm by described material separator
Grain is sent drying beater back to and is re-started drying and break up；The pulverized coal particle that particle diameter is less than or equal to 0.5mm passes through separator and cloth
Bag dust collector carries out coal dust recovery.
Preferably, described technique also includes:
By air-introduced machine, the waste gas in described coal powder collection equipment is discharged.
Preferably, described technique also includes:
When described wet coal slime carries out precrushing in described coal slime breaker, mix dry pulverized coal；And/or
Wet coal slime after precrushing is admitted to when carrying out drying and break up in drying beater, is impregnated in dry pulverized coal.
Coal slime drying system and its drying process that the embodiment of the present invention is provided, its advantage is as follows:
(1) the traditional coal slime drying process of present invention change must be by the way of thermal source, and wet coal slime is pre- by coal slime breaker
Enter after broken and dry beater and be ground into coal slime granule, coal slime particle surface moisture content is by drying what beater was sucked by negative pressure
Room temperature moving air is taken away, and by material separator sorting, qualified coal slime granule is flowed into cyclone separator, sack cleaner
Dried recovered, material separator, by frequency changer control, underproof coal slime granule is flowed into coal slime breaker and drying beater follows
Ring operation, improves coal slime and pulverizes and drying efficiency.
(2) coal slime drying process system of the present invention has the advantages that energy consumption is low, and its maximum hour processes coal slime and reaches
More than hundred tons, coal slime drying cost controls about 10 yuan/ton, and dried coal slime can be largely used to pulverized-coal fired boiler power plant,
It not only can be pressed into moulded coal and use in each power plant block coal burning boiler, can also mix distribution with other coal products and sell.
(3) in drying setting grading plant in beater, this grading plant prevents bulky grain coal slime from being hit by rotor hammer centrifugation
Hit power and flow out discharge nozzle it is ensured that bulky grain coal slime continues to flow into broken intracavity and pulverizes, so that the moisture content in coal slime is fully exposed
Break up, be conducive to moisture content to flow into air.
(4) present invention also uses power plant's used heat or steam conversion or low-temperature flue gas in the basis that normal temperature air is dried,
So that normal temperature air temperature is properly increased, so that the moisture content amount that in the air can accommodate improves, be conducive to coal slime moisture content by air
Quickly take out of, in the present invention, from pan feeding to discharging process less than 1min, coal slime moisture content can be reduced in 1min wet coal slime by it
More than 20%；The present invention also can be directly all using power plant's low-temperature flue gas or high-temperature steam etc. and institute in traditional coal slime drying process
Thermal source, and in hgher efficiency because breaing up, and thus heat exchanger effectiveness is higher, coal slime drying cost is lower.
(5) it is the dry powdery of 0-0.5mm using the coal slime granule that drying beater in the present invention is broken up, its moisture content is low
In 10%, moulded coal can be directly prepared into, more can be sold as coal blending, this coal slime grain shape is uniformly it is also possible to directly exist
Carry out efficient burning in pulverized coal power boiler.
Brief description:
Fig. 1 is the system schematic of room temperature coal slime drying process.
Fig. 2 is the system schematic carrying out low temperature coal slime drying process using power plant's low-temperature flue gas.
Fig. 3 is the system schematic carrying out low temperature coal slime drying process using power plant's thermal wastewater/vapourss.
Fig. 4 is to dry beater structural representation.
Wherein: 1, low temperature coal slime；2nd, coal slime surge bunker；3rd, screw(-type) feeder；4th, coal slime breaker；5th, material separator；
6th, dry beater；601st, discharge valve；602nd, observation port；603rd, feed pipe；604th, rotor hammer；605th, dry air blast pipe；
606th, saturated air discharge pipe；607th, backgauge rod；608th, mair motor；609th, crusher chamber；610th, discharge nozzle；7th, cyclone separator；
8th, sack cleaner；9th, pulverized coal particle；10th, air-introduced machine；11st, plate type heat exchanger.
Specific embodiment:
In order that techniques disclosed in this application content is more detailed and complete, can refer to the following of accompanying drawing and the present invention
Various specific embodiments, in accompanying drawing, identical labelling represents same or analogous assembly.However, those of ordinary skill in the art
It should be appreciated that embodiment provided hereinafter is not used for limiting the scope that the present invention is covered.Additionally, accompanying drawing is used only for
Schematically it is illustrated, and drawn not according to its life size.
With reference to the accompanying drawings, the specific embodiment of various aspects of the present invention is described in further detail.
Embodiment one:
As shown in figure 1, the coal slime drying system described in the present embodiment, including coal slime surge bunker 2, screw(-type) feeder 3, coal slime
Disintegrating machine 4, material separator 5, drying beater 6, cyclone separator 7, sack cleaner 8 and air-introduced machine 10,1 table in FIG
Show wet coal slime (before being dried), 9 expression pulverized coal particles (pulverized coal particle that wet coal slime is formed after being dried).
Coal slime surge bunker 2 is used for receiving and storing wet coal slime 1, the port of export of coal slime surge bunker 2 and screw(-type) feeder 3 import
End connects, and the port of export of screw(-type) feeder 3 is connected with the entrance point of coal slime breaker 4, wherein: the wet coal in coal slime surge bunker 2
Mud 1 is admitted to coal slime breaker 4 by screw(-type) feeder 3, in coal slime breaker 4, first wet coal slime is carried out precrushing, is formed
Coal slime granule.Enter the wet coal slime 1 in screw(-type) feeder 3, its size is typically in below 300mm, pre- through coal slime breaker 4
After broken, the size of its wet coal slime granule is generally individually smaller than 10mm.Screw(-type) feeder 3 can control wet coal slime to enter coal slime breaking
The progress of machine 4, selects to send into wet coal slime into coal slime breaker according to the amount of coal slime breaker 4 endogenous dampness coal slime or suspends feeding
Wet coal slime.
The port of export of coal slime breaker 4 with dry beater 6 entrance point is connected, drying beater 6 on be further opened with into
Air port 61, the port of export drying beater 6 is connected with material separator 5, wherein: gas at normal temperature is passed through to dry the air intake of beater
Mouth is endlessly sent into drying beater 6, and the wet coal slime granule of coal slime breaker 4 output enters after drying beater 6,
In the presence of gas at normal temperature, wet coal slime granule is constantly dried, and by not during drying being stirred continuously of beater 6
Disconnected is dispersed as smaller size of pulverized coal particle, the size substantially 0～0.5mm of the pulverized coal particle after being broken up.
The port of export drying beater 6 is connected with described material separator 5 entrance point, and the first of material separator 5 goes out
Mouth end is connected with the entrance point drying beater 6, and material separator 5 carries out to the pulverized coal particle receiving separating, if coal dust
Grain is more than 0.5mm, then this pulverized coal particle is sent back to drying beater 6 again and carries out drying and break up；If pulverized coal particle is less than or equal to
0.5mm, then be delivered to cyclone separator 7 by this part pulverized coal particle and carry out follow-up separation process.
The entrance point of cyclone separator 7 is connected with the second outlet end of material separator 5, the port of export of cyclone separator 7
It is connected with the entrance point of sack cleaner 8, the port of export of sack cleaner 8 is connected with air-introduced machine 10, wherein: enter cyclonic separation
The pulverized coal particle of device 7, in the presence of cyclone separator 7, sack cleaner 8 and air-introduced machine 10, by dried pulverized coal particle 9
Separate, and waste gas is entered in air by air-introduced machine 10.Pulverized coal particle 9 after separating can meet wanting of direct burning
Ask, belong to the coal dust that can directly use.The waste gas discharged does not contain any pollution, therefore can be directly discharged in air.
In embodiments of the present invention, cyclone separator 7 and sack cleaner 8 may be collectively referred to as coal powder collection equipment.
In embodiments of the present invention, air-introduced machine 10 can also be high-pressure suction fan.
As shown in figure 4, in embodiments of the present invention, described drying beater 6 includes: unloads with uniform pan feeding regulatory function
Material valve 601, the discharge end of discharge valve 601 is connected with feed pipe 603, and feed pipe 603 is connected formation with dry air blast pipe 605
Integrally, the side wall in feed pipe 603 also sets up observation port 602.The port of export in feed pipe 603 and dry air blast pipe 605
All connect with crusher chamber 609, be provided for breaing up mechanism to the rotation of coal slime fast-crushing inside crusher chamber 609, this rotation
Break up mechanism and hammer 604 into shape for rotor, rotor hammer 604 is rotated by mair motor 608 control, also connects full in crusher chamber 609
With air discharge pipe 606, discharge nozzle 610 is opened in saturated air discharge pipe 606 middle section, in crusher chamber 609 and saturated air
The junction of discharge pipe 606, also set up in crusher chamber 609 prevent bulky grain comminuting matter flow out discharge nozzle 610 classification dress
Put, the backgauge rod 607 that above-mentioned grading plant is arranged in the horizontal direction by multirow forms, between each backgauge rod 607, be spaced cloth each other
Put.
Coal slime material even into feed pipe 603 and is circulated to crusher chamber 609 through discharge valve 601, due to coal slime material
Viscosity larger, therefore feed pipe 603 is made using the material of shiny surface, is easy to the inflow of coal slime material, prevents coal slime
Blocking.Controlling rotor hammer 604 to run up by mair motor 608 makes coal slime crushing material become molecule, makes the moisture content in coal slime
Fully expose and break up, outside dry air enters crusher chamber 609 and powder by dry air blast pipe 605 in the presence of negative pressure
It is broken into the coal slime contact of molecule, is carried coal slime surface moisture content to air using dry air, make above-mentioned to contact with coal slime
Dry air is changed into saturated moist air.When coal slime crushing material to can be raised particle diameter that air-flow takes away when its through backgauge rod
607 and the discharge nozzle 610 from saturated air discharge pipe 606 stage casing exits into next stage equipment, and do not meet Particle size requirements
Bulky grain coal slime continues to fall in crusher chamber 609 under the stop of backgauge rod 607 to be pulverized, until be ground into can be through backgauge rod
607 molecule.
In embodiments of the present invention, be also provided with scraper in discharge valve, by coal slime larger for viscosity scrape into
To discharge valve and carry out subsequent treatment.
In embodiments of the present invention, coal slime breaker 4 crush wet coal slime during, dry pulverized coal can also be mixed so that
Coal slime breaker 4 during crushing wet coal slime, broken after the surface of wet coal slime be stained with dry pulverized coal it is not easy to inter-adhesive,
Lifting crushing effect.Wherein dry pulverized coal can directly be done to coal slime breaker 4 importation in the outfan drying beater 6
Coal dust is it is also possible to directly add dry pulverized coal from other channels coal slime breaker 4.
In embodiments of the present invention, dry beater 6 to split broken after wet coal slime carry out drying and break up when, can also mix
It is more preferable that other dry pulverized coals such as mixed slack coal, mixed coal, brown coal, so drying break up effect.
In embodiments of the present invention, dry air blast pipe 605 is inputted normal temperature air or power plant's low-temperature flue gas or low
Warm air enters before drying beater 6, can also first pass through air heat humidity equipment reduce normal temperature air or power plant's low-temperature flue gas or
Humidity in Cryogenic air, improves drying and breaks up effect.
The coal slime drying system that the embodiment of the present invention is provided can be carried out using normal temperature air or less than 100 DEG C Cryogenic air
It is dried.
Embodiment two:
As shown in Fig. 2 the embodiment of the present invention additionally provides a kind of coal slime drying system, give including coal slime surge bunker 2, spiral
Material machine 3, coal slime breaker 4, material separator 5, drying beater 6, cyclone separator 7, sack cleaner 8 and air-introduced machine 10,
1 represents the wet coal slime before being dried in fig. 2, and 9 represent dried coal slime (coal dust).
In the present embodiment, what the air inlet of drying beater 6 was introduced is the low-temperature flue gas of power plant, dries beater 6
Carry out drying using low-temperature flue gas to wet coal slime to break up, improve and dry the efficiency broken up.
The annexation of all parts and function description and enforcement in the coal slime drying system that the embodiment of the present invention is provided
All consistent in example one, it is referred to implement the description in, will not be described here.
Embodiment three:
As shown in figure 3, the embodiment of the present invention additionally provides a kind of coal slime drying system, give including coal slime surge bunker 2, spiral
Material machine 3, coal slime breaker 4, material separator 5, drying beater 6, cyclone separator 7, sack cleaner 8 and air-introduced machine 10,
1 represents the wet coal slime before being dried in figure 3, and 9 represent dried coal slime (coal dust).
The coal slime drying system that the embodiment of the present invention is provided also includes plate type heat exchanger 11, input in plate type heat exchanger 11
Gas at normal temperature and the thermal wastewater/vapourss of power plant's discharge, thermal wastewater/vapourss and normal temperature air are carried out heat exchange, are produced
Cold waste water be expelled directly out, and produce hot-air (also referred to as " Cryogenic air ") then pass through drying beater 6 air inlet enter
Enter to dry to carry out in beater 6 drying of wet coal slime.
In the coal slime drying system that the embodiment of the present invention is provided, the annexation of miscellaneous part and function be all and embodiment
Consistent in one, it is referred to the description in embodiment one, will not be described here.
Example IV:
The embodiment of the present invention additionally provides a kind of coal slime drying coal slime being dried using above-mentioned coal slime drying system
Technique, comprising:
S1, wet coal slime are transported in coal slime surge bunker by conveyer belt；
After system electrification, wet coal slime is sent in coal slime surge bunker by conveyer belt, wherein: wet coal slime can be coal preparation plant
Product from failing, profile be bulk, it is sized generally below between 300mm.Wet coal slime be usually by take measurements greatly 0.5mm with
Under pulverized coal particle under the viscous effect of appearance water mutually absorption formed.Wet coal slime can be by disk filter to taking off
Water, makes this wet coal slime reduce by 25～35% moisture content.Wet coal slime can be temporarily stored in coal slime surge bunker, then concentrate and be sent to
Coal slime breaker.
S2, wet coal slime are sent to coal slime breaker by coal slime surge bunker by screw(-type) feeder, wet coal slime are carried out pre- broken
Broken；
Wet coal slime is introduced into screw(-type) feeder in coal slime surge bunker, then sends into coal slime breaking by screw(-type) feeder again
Machine, screw(-type) feeder can select to send into the rhythm of coal slime, quickening, steady or stopping according to the amount of coal slime in coal slime breaker
Convey wet coal slime.Wet coal slime can enter screw(-type) feeder by conveyer belt, or the entrance point of screw(-type) feeder is arranged on
The lower section of the port of export of coal slime surge bunker, so opens coal slime surge bunker, will be so that wet coal slime is directly entered screw feeder
In machine.The entering of wet coal slime in screw(-type) feeder interior feeding coal slime breaker during rotary motion, wherein coal slime breaker
Mouth end can be arranged on the underface of the screw(-type) feeder port of export.
Coal slime breaker can carry out precrushing using high-speed rotation hammer or rotating cage to wet coal slime so that after precrushing
The particle diameter of wet coal slime granule is less than 10mm, is easy to subsequently dry beater drying and breaks up, also can lift drying simultaneously and break up
Efficiency.
Wet coal slime after s3, precrushing is admitted in drying beater is dried and is broken up；
After wet coal slime after precrushing is admitted to drying beater, it is dispersed as coal slime granule drying in beater.Beat
Coal slime granule after dissipating and the normal temperature air or the power plant's low-temperature flue gas or low that suck drying beater air inlet by negative pressure
Warm air is mixed, and is taken out of coal slime particle surface moisture content using normal temperature air or power plant's low-temperature flue gas or Cryogenic air, quilt
It is dried into pulverized coal particle, the wherein particle diameter of pulverized coal particle is 0～0.5mm.
Normal temperature air or power plant's low-temperature flue gas or Cryogenic air after drying beater, in the presence of air-introduced machine,
Dry beater, material separator, cyclone separator and sack cleaner and form current path, air is permissible in flow process
The moisture of wet coal slime particle surface is taken away so that coal slime granule is oven-dried as pulverized coal particle.Dry beater in work simultaneously
During constantly stir, carry out accelerating the loss of moisture in wet coal slime, improve drying efficiency.
The wet coal slime of precrushing can deliver to drying beater by transmission belt, or the entrance point drying beater is set
Put the lower section in the coal slime breaker port of export, the wet coal slime after crushing can directly be sent in drying beater.
S4: be oven-dried the pulverized coal particle after breaing up and be admitted to material separator；
It is oven-dried that the pulverized coal particle after breaing up can flow into material separator in the presence of ascending air successively, whirlwind divides
From device and sack cleaner, wherein:
It is oven-dried the pulverized coal particle after breaing up and enters material by stages after device, can be sorted by material separator, particle diameter
Pulverized coal particle less than or equal to 0.5mm is transported to cyclone separator, sack cleaner successively, realizes pulverized coal particle is returned
Receive；Particle diameter is more than the pulverized coal particle of 0.5mm, it will is re-fed into drying in beater and re-starts drying and break up.
S5, by air-introduced machine by cyclone separator, sack cleaner flowing gas discharge.
Flowing gas can be the low-temperature flue gas of normal temperature air, Cryogenic air or power plant, for normal temperature air and low temperature
Air, can be directly discharged in air, and for power plant's low-temperature flue gas, then need to be delivered to power plant's smoke discharging pipe, carry out dirt
Dye is emitted in air after processing again.
It should be understood that when wet coal slime carries out precrushing in step s2, dry pulverized coal can be added, the wet coal after precrushing
Mud surface is stained with dry pulverized coal, prevents the wet coal slime after precrushing to be again sticked together, and affects precrushing effect.In step s2
In, the dry pulverized coal that added can be inputted with the part pulverized coal particle that exported in thing step s4 or by other channels
Dry pulverized coal.
In step s3, when drying being carried out to the wet coal slime after precrushing breaing up, smalls, mixed coal, brown coal etc. can be blended
Other dry pulverized coals are so that dry that to break up effect more preferable.
In step s3, normal temperature air or power plant's low-temperature flue gas or Cryogenic air enter before drying beater, can also be first
Humidity in normal temperature air or power plant's low-temperature flue gas or Cryogenic air is reduced by air heat humidity equipment, improves drying and break up effect
Really.
A kind of coal slime drying system being provided in the embodiment of the present invention and its drying process not only can be used to process
Coal slime, can also be used to process mud, distiller grains and the material with similar characteristics.Therefore involved in the embodiment of the present invention
Coal slime can also be mud, distiller grains and the material with similar characteristics.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the art, also may be used on the basis of the above description
To make other changes in different forms, the embodiment that the present invention is enumerated cannot give to all of embodiment thoroughly
To the greatest extent, every belong to the obvious change that technical scheme extended out the or variation protection model still in the present invention
The row enclosing.The all documents referring in the present invention are all incorporated as reference in this application, as same piece document is independent
It is cited as with reference to like that.
Claims (16)
1. a kind of coal slime drying system it is characterised in that: described system includes: coal slime breaker (4), dry beater (6) and
Coal powder collection equipment, wherein:
The entrance point of described coal slime breaker (4) is used for receiving wet coal slime, the port of export of described coal slime breaker (4) and described baking
The entrance point of dry beater (6) connects；Air inlet offered on described drying beater (6), the going out of described drying beater (6)
Mouth end is connected with described coal powder collection equipment.
2. as claimed in claim 1 a kind of coal slime drying system it is characterised in that: described system also includes material separator
(5), wherein:
The entrance point of described material separator (5) is connected with the described port of export drying beater (6), described material separator
(5) first outlet end is connected with the described entrance point drying beater (6), the second outlet end of described material separator (5)
It is connected with described coal powder collection equipment.
3. as claimed in claim 12 a kind of coal slime drying system it is characterised in that described coal powder collection equipment includes whirlwind
Separator (7) and sack cleaner (8), wherein:
The entrance point of described cyclone separator (7) is connected with the second outlet end of described material separator (5), described cyclonic separation
The port of export of device (7) is connected with the entrance point of described sack cleaner (8).
4. as claimed in claim 3 a kind of coal slime drying system it is characterised in that described system also includes air-introduced machine (10),
Wherein:
Described air-introduced machine (10) is connected with the port of export of described bag dust collector (8).
5. as claimed in claim 1 a kind of coal slime drying system it is characterised in that described system also includes coal slime surge bunker
(2) and screw(-type) feeder (3), wherein:
The outlet of described coal slime surge bunker (2) is connected with the entrance point of described screw(-type) feeder (3), described screw(-type) feeder (3)
The port of export be connected with the entrance point of described coal slime breaker (4).
6. coal slime drying system as claimed in claim 1 is it is characterised in that described system also includes: plate type heat exchanger (11),
Wherein:
The heat of normal temperature air and thermal wastewater/vapourss is swapped by described plate type heat exchanger (11), and normal temperature air is changed
Dry beater (6) for being delivered to after Cryogenic air.
7. described coal slime drying system as arbitrary in claim 1 to 6 it is characterised in that: described drying beater (6) include:
Discharge valve (601), the discharge end of described discharge valve (601) is connected with feed pipe (603), and described feed pipe (603) is empty with dry
Gas blast pipe (605) is connected to form one, the port of export of described feed pipe (603) and dry air blast pipe (605) all with broken
Broken chamber (609) connection, is provided for breaing up mechanism to the rotation of coal slime fast-crushing, in institute inside described crusher chamber (609)
State and saturated air discharge pipe (606) is also connected on crusher chamber (609), discharge nozzle (610) is opened in saturated air discharge pipe (606)
Middle section, in described crusher chamber (609) and the junction of saturated air discharge pipe (606), also sets in described crusher chamber (609)
Put the grading plant preventing bulky grain comminuting matter from flowing out discharge nozzle (610).
8. coal slime drying system as claimed in claim 7 it is characterised in that: described grading plant is arranged in the horizontal direction by multirow
Backgauge rod (607) composition of row, arranged for interval each other between each backgauge rod (607).
9. coal slime drying system as claimed in claim 7 it is characterised in that: described rotation break up mechanism for rotor hammer into shape (604),
Described rotor hammer (604) is rotated by mair motor (608) control.
10. coal slime drying system as claimed in claim 7 it is characterised in that: described rotation break up mechanism be rotating cage, described turn
Cage is rotated by mair motor (608) control.
11. coal slime drying systems as claimed in claim 7 it is characterised in that: the side wall in described feed pipe (603) also sets up
Observation port (602).
12. coal slime drying systems as claimed in claim 7 it is characterised in that: described dry air blast pipe (605) also with change
Hot dehumidification equipment is connected.
A kind of 13. techniques coal slime being dried using described coal slime drying system as arbitrary in claim 1 to 12, it is special
Levy and be: described technique includes:
S1, by wet coal slime send into coal slime breaker after carry out precrushing；
Wet coal slime after s2, precrushing is admitted in drying beater and carries out drying and break up, and forms pulverized coal particle；
S3, pulverized coal particle are admitted to coal powder collection equipment and carry out coal dust recovery.
14. coal slime drying processes as claimed in claim 13 it is characterised in that: described pulverized coal particle is admitted to coal powder collection and sets
Standby carry out separating, comprising:
After described pulverized coal particle is admitted to material separator, the pulverized coal particle that particle diameter is more than 0.5mm is sent by described material separator
Return and dry beater and re-start drying and break up；The pulverized coal particle that particle diameter is less than or equal to 0.5mm is removed by separator and cloth bag
Dirt device carries out coal dust recovery.
15. coal slime drying processes as described in claim 13 or 14 it is characterised in that: described technique also includes:
By air-introduced machine, the waste gas in described coal powder collection equipment is discharged.
16. coal slime drying processes as described in claim 13 or 14 it is characterised in that: described technique also includes:
When described wet coal slime carries out precrushing in described coal slime breaker, mix dry pulverized coal；And/or
Wet coal slime after precrushing is admitted to when carrying out drying and break up in drying beater, is impregnated in dry pulverized coal.
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