CN106152734A - Dry materials method and rotary drying system - Google Patents
Dry materials method and rotary drying system Download PDFInfo
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- CN106152734A CN106152734A CN201510162042.XA CN201510162042A CN106152734A CN 106152734 A CN106152734 A CN 106152734A CN 201510162042 A CN201510162042 A CN 201510162042A CN 106152734 A CN106152734 A CN 106152734A
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Abstract
The invention discloses a kind of dry materials method and rotary drying system, this system includes drumdrier and dust removing units, and the heating gas that burner produces and material all enter the arrival end (A) of revolving cylinder (1) after constant feeder metering；Described method includes all being passed through heating gas in outer wall sleeve (11) and drum cavity (12), the gas utilizing the barrel between outer wall sleeve and material to contact the heating gas in heating and drum cavity directly heats and is jointly dried material, and utilize be passed through in drum cavity to heat the dust granules that gas is taken away in material, from drum cavity, effluent air enters deduster.The method can strengthen thermocontact area and the thermo-contact mode of material, and heat transfer efficiency is high；The heating gas being passed through in drum cavity can take small particles material out of, removes dust granules for subsequent technique, reduces the dedusting pressure of subsequent technique, lays the foundation for integrated artistic successful operation.
Description
Technical field
The invention belongs to drying device field, process in particular it relates to be mainly used in being dried of low-order coal etc.
A kind of drying system and method.
Background technology
The low-order coal resource reserves such as the brown coal of China, jet coal enrich, and low-order coal has water content height, sends out
Heat height low, active, the inflammable feature such as frangible, be not suitable for long-distance transportation, do not form scale always
Scientific utilization.The water content being made low-order coal by drying process is reduced, on the one hand can improve calorific value and
Energy density, reduces cost of transportation, on the other hand can also meet the requirement of subsequent technique, improves downstream
The equipment efficiency of usage of device, reduces equipment scale.
At present, main both at home and abroad low-order coal dry technology mainly has: hot dry dehydration technique, HTHP
Dehydration technique, cold dry dehydration technique and vacuum expansion dehydration technique etc..These low-order coal dry technologies
Generally power consumption is relatively big, equipment is complicated, thus is in scale demonstration phase more, and the complexity run and
Stable problem also counteracts that the scale application of these techniques.As low-order coal water content increases, often use
The energy consumption needed for dry technology of rule also increases accordingly.
Therefore, process is simple, energy-conserving and environment-protective, dehydration rate height and the coal dry technology one not relapsing water
It is directly the Main way of research and development.Wherein, a large amount of investigations and analysis shows how to improve heat transfer efficiency
To reduce energy consumption for drying further, it is achieved the rapid draing of coal, and how to control and to reduce drying system
Middle dust growing amount etc. becomes current low-order coal dry technology and realizes that industrial applications needs the main of breakthrough badly
Technical problem.
Content of the invention
For the problems referred to above or the defect of prior art, the invention provides a kind of dry materials and dedusting side
Method and corresponding material drying system, can effectively strengthen drying effect, reduces the dedusting pressure of subsequent technique
Power, and energy-saving effect is prominent.
For achieving the above object, according to an aspect of the invention, it is provided a kind of dry materials method,
The method includes:
Material to be dried is added in the drum cavity of revolving cylinder；
It is all passed through heating gas in the outer wall sleeve and drum cavity of described revolving cylinder, utilize and be passed through institute
State the heating gas in drum cavity to carry out gas to described material and directly heat, utilize to be passed through simultaneously and add
The described outer wall sleeve of hot gas carries out barrel contact heating to described material；
Wherein, the heating gas being passed through in described drum cavity is utilized to take away the dust in described material
Grain, and the gas velocity of the heating gas being passed through in described drum cavity by regulation so that described rolling
Heating gas in tube inner chamber takes away the dust granules of the corresponding particle diameter in described material.
Preferably, gas velocity V of the heating gas in described drum cavity*Described with under this gas velocity
Meet between the maximum particle diameter of the described dust granules that heating gas can be taken away:
Wherein, Re is Reynolds number, Re=ρP×d×g/μ；ρPFor grain density, unit is kg/m3；ρ
For gas density, unit is kg/m3；D is particle diameter, and unit is m；G is acceleration of gravity, single
Position is m/s2；μ is gas viscosity, and unit is Pa s.
Preferably, the method also includes:
It by length, rotating speed, axial inclination a of the described revolving cylinder of regulation, is passed through described outer wall sleeve
In the heating flow of gas and/or the flow of the heating gas being passed through in described drum cavity, control dry
The water content when port of export of described revolving cylinder flows out for the described material after dry and particle diameter.
It is highly preferred that control dried described material containing when port of export of described drum cavity flows out
The water yield is 1～5%, preferably 1～2%；The particle diameter of the described dust granules that heated gas is taken away is 30 μm
Hereinafter, preferably less than 20 μm.
Preferably, the described heating gas being passed through in described outer wall sleeve and drum cavity is selected from fuel
The high-temperature flue gas producing after gas, fuel oil and solid fuel ignition, the temperature of this high-temperature flue gas is
250～400 DEG C, preferably 300～350 DEG C.
Preferably, the oxygen content of the heating gas being passed through in described drum cavity is less than 5%.
According to another aspect of the present invention, additionally providing a kind of rotary drying system, this system includes:
Rotary drying unit, described rotary drying unit includes at least one revolving cylinder, and described revolution is rolled
Cylinder includes outer wall sleeve and drum cavity, and the arrival end of described rotary drying unit is provided with for outside described
Wall sleeve and drum cavity are all passed through the gas introduction part of heating gas and in described cylinder
Chamber adds the material addition portion of material to be dried；With
Dust removing units, described dust removing units connects with the port of export of described rotary drying unit, with to described
After the steam of outflow in drum cavity, heating, gas and the dust granules carried secretly carry out separating at high temperature.
Preferably, described dust removing units includes overcoat and at least one dedusting being arranged in described overcoat
Device, gas and carrying secretly after steam that what the described port of export was flowed out by described deduster be dried produces, heating
Dust granules carry out separating at high temperature, the port of export of the inner cavity chamber of described overcoat and described rotary drying unit
Connection, described outer put be provided with dried material outlet, exhaust outlet and the dust granules of gas go out after dedusting
Mouthful, dried material is discharged from the outlet of described dried material, separates the gas after dedusting from described exhaust
Mouth is discharged, and the dust granules after separation is discharged from the outlet of described dust granules.
Preferably, described deduster is selected from cyclone separator, sack cleaner, metallic filter, pottery
One or more in filter.
Preferably, described revolving cylinder axially downwardly tilts and axle from described arrival end towards the described port of export
Being 1:100～3:100 to inclination angle, the rotating speed of described revolving cylinder is 1～10r/min.
According to technique scheme, in the dry materials method and rotary drying system of the present invention, logical
The outer wall sleeve of passing revolving cylinder and drum cavity are all passed through heating gas, can strengthen the thermo-contact of material
Area and thermo-contact mode, heat transfer efficiency is high, and drying efficiency and effect are obvious；Drum cavity is passed through and adds
Hot gas simultaneously controls the steam evaporating after air velocity also can take dry materials out of and small particles material,
Remove dust granules for subsequent technique, reduce the dedusting pressure of subsequent technique, be integrated artistic successful operation
Lay the foundation.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Brief description
Fig. 1 is the structural representation of the rotary drying system according to the preferred embodiment of the present invention, in figure
Revolving cylinder carried out showing slightly and be in tilted layout large to highlight axial inclination a of revolving cylinder.
Description of reference numerals
1 revolving cylinder 2 overcoat
3 cyclone separator 4 sack cleaners
11 outer wall sleeve 12 drum cavities
13 semicircle flights
The A arrival end B port of export
C dried material exports D exhaust outlet
E dust granules exports a axial inclination
Detailed description of the invention
It is described in detail below in conjunction with the detailed description of the invention to the present invention for the accompanying drawing.It should be appreciated that
Detailed description of the invention described herein is merely to illustrate and explains the present invention, is not limited to this
Bright.
In the present invention, in the case of illustrating on the contrary, the noun of locality of use as " upper and lower, top,
For the end ", is typically for direction shown in the drawings, or for vertical, vertical or gravity direction
For on, or each parts mutual alignment relation that dependency structure equipment is under normal operating condition is retouched
State word；Similarly, for ease of understanding and describing, " inside and outside " refers to relative to each parts itself
Profile inside and outside, but the above-mentioned noun of locality is not limited to the present invention.
Present invention firstly provides a kind of dry materials method, the method uses drumdrier to material
(such as coal dust) is dried process.Wherein, Fig. 1 is seen, at the revolving cylinder of drumdrier
It during the rotary work of 1, is all passed through in the outer wall sleeve 11 and drum cavity 12 of revolving cylinder 1
Heating gas, the barrel of outer wall sleeve 11 is heated, thus utilizes outer wall sleeve 11 and drum cavity 12
In material (not shown) between barrel contact heating and drum cavity 12 in heating gas
The gas of body directly heats and is jointly dried material, and utilization is passed through adding in drum cavity 12
Hot gas takes away the dust granules in material.So, it is substantially distinguished from prior art and is only rolled by revolution
The mode of outer wall sleeve 11 heating of cylinder, provides barrel contact heating and gas heating simultaneously.Relative to
For material, the heating gas that is passed through in drum cavity 12 is for directly heating gas, and is passed through outer wall set
The heating gas of the annular space of cylinder 11 is indirect heating gas.Owing to adding the gas side of directly heating
Formula, thus enhance thermocontact area and the heat exchange mode of the material in cylinder, it is ensured that baking temperature is equal
Even, it is achieved rapid draing.In cylinder heating gas can heated material the steam taking away material evaporation,
Enhance drying effect and energy-saving effect is also more obvious.Especially since the heating gas being passed through in cylinder
Body has certain mobility, and the material in cylinder is thrown repeatedly, and heating gas utilizes gas speed to take away and raises
The dust granules rising, thus reduce the dust content of product and the dedusting pressure of subsequent technique, contribute to obtaining
The material finished product of particle diameter degree requirement must be met, lay the foundation for follow-up pyrolysis process for upgrading, increase total system
Stable operation cycle.
In this method, it is further advanced by the gas of the heating gas that regulation is passed through in drum cavity 12
Speed V*So that the heating gas in drum cavity 12 takes away the dust granules of the corresponding particle diameter in material.
Specifically, as a example by the coal dust of the coal charges such as low-order coal, according to analyzing and statistics repeatedly, conclusion, can draw
Gas velocity V of the heating gas being passed through in drum cavity 12*With this gas velocity V*Lower heating gas energy
Should meet between maximum particle diameter d of the dust granules enough taken away:
Wherein, Re is Reynolds number, Re=ρP×d×g/μ；ρPFor grain density, unit is kg/m3；ρ
For gas density, unit is kg/m3；D is particle diameter, and unit is m；G is acceleration of gravity, single
Position is m/s2；μ is gas viscosity, and unit is Pa s.It according to above-mentioned computing formula, is passed through into the barrel chamber
In the case of the gas flow rate of heating gas is sufficiently high, can effectively take away the particle diameter of the overwhelming majority less than d
Material, but do not affect the retention of the material of bigger particle diameter.
After carrying heating gas and the material heat exchange of dust granules, from the port of export B ease of revolving cylinder 1
Go out, can enter in deduster such as cyclone separator 3, so that separating treatment is carried out to the dust granules swept along.
Now, owing to the heating gas of the into the barrel chamber of revolving cylinder 1 also carries steam during dry materials, rotation
Wind separator 3 also has its ideal operation range of flow, is therefore preferably and meets: in drum cavity 12
The vapor flow sum of flow and material evaporation of heating gas between selected cyclone separator 3
Ideal operation range of flow in.In other words, the flow of the heating gas being passed through into the barrel chamber is preferably whirlwind
The ideal operation flow of separator 3 deducts the water vapour amount producing in dry run.Thus, regulation is passed through
The flow velocity of the heating gas of into the barrel chamber and flow, can control the dust content in material after being dried, and make rotation
Wind separator is under optimum Working.
It is obliquely installed as it is shown in figure 1, drumdrier is commonly angled relative to horizontal plane (or ground), return
Axial inclination a of tumbler cylinder 1 is preferably 1:100～3:100, and certain axial inclination a can be conducive to material
Can be suitable from port of export B after the drying after the arrival end A of drumdrier enters drum cavity 12
Profit flows out, but excessive axial inclination a then accelerates material to flow out, and is unfavorable for the stop in into the barrel chamber for the material
Drying time.Refer to it should be noted that axial inclination a is 1:100: when drumdrier peace
When being loaded on level ground, if the axial length of revolving cylinder 1 is (i.e. between arrival end A to port of export B
Axial length) when being 100 long measures, then the axis centre of port of export B is relative to arrival end A
Low 1 long measure of axis centre.Additionally, according to the operating characteristic of common drumdrier, knot
The heat transfer effect of compound material and barrel in view of energy-saving effect, the rotating speed of revolving cylinder 1 is preferably 1～10
R/min, concrete rotating speed specifically determines according to handled inventory and water content thereof, and in dry run
Medium speed also variable, to adapt to the material-heat-exchanging characteristic of different drying period.
Specifically, by regulating length, rotating speed, axial inclination α of revolving cylinder 1, being passed through outer wall set
The flow of the heating gas in cylinder 11 and/or the flow of the heating gas being passed through in drum cavity 12, controlled
Make water content when the port of export B of revolving cylinder 1 flows out for the dried material and particle diameter.That is, material
When the port of export B of revolving cylinder 1 flows out, it is desirable to acquisition be water content and dust content meets the requirements
Qualified products, be beneficial to subsequent technique process.Wherein, the axial length of revolving cylinder 1 and being passed through
The uninterrupted of the heating gas of the into the barrel chamber of revolving cylinder 1 becomes anti-with the water content of dried material
Ratio, and as it was previously stated, axial inclination a size is directly proportional to the water content of port of export material, turning of cylinder
Speed is same, and rotary rpm is higher, and water content is higher.Specifically, Fig. 1 is seen, it is clear that revolution rolling
The axial length of cylinder 1 is longer, and the duration that material flows out port of export B from arrival end A is longer, during heating
Between long, be dried more thorough, same, all the more so to material direct-fired heating gas.Revolution rolling
The rotating speed of cylinder 1 is big, and the time of staying in rotating cylinder for the material is short is unfavorable for dry materials.In addition, in revolution
In the case that the cross section of cylinder 1 is constant, it is bigger that into the barrel chamber direct-fired heating gas is clearly flow,
Gas flow rate is bigger, and heat drying effect is more obvious, and the dust granules swept along from port of export B is more,
The qualification rate i.e. directly heating the uninterrupted of the gas particle diameter degree with the material flowing out from port of export B becomes
Direct ratio.Therefore, the inventive method can be by controlling length, rotating speed and axial inclination a of revolving cylinder 1
And the uninterrupted of the heating gas being passed through in drum cavity 12 so that dried material is from revolution
The port of export B of cylinder 1 is formed as water content and particle diameter degree all qualified product when flowing out.It is said that in general,
Controlling water content when the port of export B of described drum cavity 12 flows out for the dried material is 1～5%,
It is preferably 1～2%；The particle diameter of the described dust granules that heated gas is taken away is less than 30 μm, preferably
It is less than 20 μm.
Wherein, the height that described heating gas produces after being preferably fuel gas, fuel oil or solid fuel ignition
Temperature flue gas, can be used as other heating certainly by being passed through after burner combustion in drum cavity 12
Gas.Specifically, can by from the fuel gas of public engineering station, fuel oil or solid fuel by combustion air
Machine blasts in hot-blast stove, and in hot-blast stove, fully burning produces high-temperature flue gas, the temperature one of this high-temperature flue gas
As control be 250～400 DEG C, preferably 300～350 DEG C.High-temperature flue gas simultaneously enters entering of revolving cylinder 1
Mouth end A, thus can branch in the mezzanine space of outer wall sleeve 11 and into the barrel chamber.In addition, for preventing
Oxygen burning met by high temperature drying material, and the oxygen content of the heating gas being passed through in drum cavity 12 generally should be low
It in certain value, for example, is usually for low-order coal and is less than 5%, thus ensure the peace of equipment and personnel
Quan Xing.To this end, the exhaust outlet (not shown) of described hot-blast stove can relative set oxygen content detection dress
Put, in order to monitor in real time.
Based on above-mentioned dry materials method, the present invention further correspondingly provides a kind of rotary drying system, and this is
System mainly includes rotary drying unit and dust removing units, may also include constant feeder, burner etc. multiple
The funtion part connecting.Rotary drying unit includes at least one revolving cylinder 1, and revolving cylinder 1 includes
Outer wall sleeve 11 and drum cavity 12, the arrival end A of rotary drying unit is formed for outer wall set
Cylinder 11 and drum cavity 12 are all passed through the gas introduction part of heating gas and for drum cavity 12
The material addition portion of middle addition material to be dried；With
Dust removing units, dust removing units connects with the port of export B of rotary drying unit, with to drum cavity
After the steam of outflow in 12, heating, gas and the dust granules carried secretly carry out separating at high temperature.
Wherein, gas introduction part and material addition portion are as functional structure parts, can be revolving cylinders 1
Arrival end A on regional area part, it is possible to be processed to form at the arrival end A of revolving cylinder 1,
It is also used as single connection member and be arranged on arrival end A.Gas introduction part is used for connecting heating gas
Source of the gas to import heating gas, can be the regional area on arrival end A, it is also possible to be connect tracheae,
Can also is that be formed on arrival end A with the gas pipeline of docking or to the attachment structure that is connected of gas system,
For example can be connected with burner tubes, so that the high-temperature flue gas that burner produces is passed through outer wall set simultaneously
In cylinder 11 and drum cavity 12.Similarly, material addition portion is for adding material to be dried, permissible
It is the regional area on arrival end A, it is also possible to be hopper, hopper installation portion, can also is that arrival end A
Upper connection hopper or the attachment structure etc. of feed bin.
Shown in Fig. 1, material enters the revolving cylinder 1 of drumdrier after constant feeder metering
Arrival end A, what burner produced is dried with heating gas (i.e. heat smoke) also into revolving cylinder 1
Arrival end A, and a part for heating gas flows in the outer wall sleeve 11 of revolving cylinder 1, another portion
Branching in the drum cavity 12 of revolving cylinder 1, from drum cavity 12, effluent air enters and removes
Carrying out de-dirt in dirt unit, dried material flows out from the port of export B of revolving cylinder 1.
Wherein, drumdrier is widely used in the industrial departments such as metallurgy, chemical industry, building materials, mine,
It is mainly used in being dried little bulk or granular material.In the present embodiment, revolving cylinder 1 is interior
Perisporium is provided with more can make material uniformly scatter, fully kick up and can more make full use of the flight in hot side space
13.Low-order coal material fully can be scattered downwards by the top of revolving cylinder 1 under the effect of flight, it is achieved
With inner tube wall and the abundant heat exchange directly heating gas, remove the moisture in low-order coal.There is high spreading energy
The flight of power, it is ensured that material is fully shed, improves and directly heats gas to fine powder in material
Removing ability.Under flight effect, material and the inner tube wall of outer wall sleeve 11 fully kicked up connect
Touching and being dried, the moisture in material is constantly evaporated, and together discharges drum cavity 12 with directly heating gas.
Such as Fig. 1, drumdrier also includes the overcoat 2 connecting with revolving cylinder 1, and this overcoat 2 wraps
Include the dried material outlet C and the exhaust outlet D being arranged on top being arranged on bottom, outside deduster is built in
In set 2, dried material enters overcoat 2 from the port of export B of revolving cylinder 1 and is gone out by dried material
Mouth C discharges, and rotated valve draws off and be delivered to next workshop section；In the drum cavity 12 of revolving cylinder 1
Gas discharged by exhaust outlet D after deduster dedusting.Wherein, deduster is preferably cyclonic separation
One or more combination in device the 3rd, sack cleaner the 4th, metallic filter, ceramic filter, example
Such as cyclone separator 3 and the sack cleaner 4 for concatenation in Fig. 1.From revolving cylinder 1 steam and
Smoke mixture enters deduster, the dust granules in mixed gas separated, collect after can removing dust device
The star discharge valve of bottom discharges system from dust granules outlet E, enters and is connected with dust granules outlet E
Wet type kneading machine in, the kneading that adds water becomes wet briquette or bar-shaped outward transport, it is ensured that fine powder will not fly away everywhere and
Pollute environment.And the flue gas after dedusting discharges system by exhaust outlet D.Wherein, cyclone separator 3
It is positioned over the inside of drumdrier with sack cleaner 4, i.e. in overcoat 2, the temperature in overcoat 2
Usually maintain 100～105 DEG C under in working order, thus ensure that the water vapour in flue gas will not be tied
Dew, blocks deduster.
It is specifically described the present invention below by way of specific embodiment.
Embodiment 1:
As a example by a diameter of 3.0m, the drumdrier as 20t/h for the raw coal treating capacity.Drying condition is
By 400 DEG C, the low-order coal particle to 25 DEG C, moisture 20% for the heat smoke of oxygen content 4% does
Dry, the flue-gas temperature in drying machine exit is 140 DEG C, moisture-free coal temperature 120 DEG C, moisture 5%, technique
The middle dry coal dust removing needing granularity is less than 30 μm, the moisture-free coal obtaining big granularity sends into lower road work
Sequence.Being computed, the gas velocity that removing 30 μm of fine breezes needs is 0.069m/s, is converted into gas stream
Amount is 2433.56m3/h.The weight drying out moisture in coal is 3000kg/h, changes under the conditions of 140 DEG C
Being counted as volume flow is 5174.05m3/ h, be now dried that the steam producing be enough in moisture-free coal is little
Blow out entrance particle piece-rate system in the fine particles of 30 μm from whizzer.It is more than for control
The moisture-free coal fine powder of 30 μm is brought into cyclone separator, drying machine outlet need overcoat 2 transversal
Enlarged areas is to 20.9m2, the fine powder enabling particle diameter to be more than 30 μm settles in overcoat 2 and falls.
It is 15m/s, a diameter of 350mm of cyclone inlet or be that cyclone design enters implication speed
250*500mm2Square configuration.
Embodiment 2:
Under same reactor and reaction condition, technique needs to be less than granularity the dry duff of 75 μm
Powder removes, and the moisture-free coal obtaining big granularity enters next process.It is computed, remove 75 μm of moisture-free coals
The gas velocity that fine powder needs is 0.1741m/s, and being converted into gas flow is 6140.43m3/h.Can in coal
The moisture weight drying out is 3000kg/h, and the vapor flow that can be converted under the conditions of 140 DEG C is
5174.05m3/ h, now in order to blow out the fine powder less than 75 μm in moisture-free coal, require supplementation with directly adds
The heat smoke amount of heat is 966.38m3/h.It is 20m/s that cyclone design enters implication speed, then whirlwind divides
From device inlet diameter be 330mm or be 230*470mm2Square configuration.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention does not limit
Detail in above-mentioned embodiment, in the technology concept of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant and improvement, but these simple variant and improvement belong to this
Bright protection domain.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, various possible combinations are no longer illustrated by the present invention separately.
Additionally, also can be combined between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a dry materials method, wherein, the method includes:
Material to be dried is added in the drum cavity (12) of revolving cylinder (1)；
It is all passed through in the outer wall sleeve (11) and drum cavity (12) of described revolving cylinder (1) and add
Hot gas, utilizes the heating gas being passed through in described drum cavity (12) to carry out gas to described material straight
Connect heating, utilize the described outer wall sleeve (11) being passed through heating gas to carry out cylinder to described material simultaneously
Wall contact heating；
Wherein, the heating gas being passed through in described drum cavity (12) is utilized to take away the powder in described material
Dirt particle, and the gas velocity of the heating gas being passed through in described drum cavity (12) by regulation
(V*) so that the heating gas in described drum cavity (12) takes away the corresponding particle diameter in described material
Dust granules.
2. dry materials method according to claim 1, wherein, described drum cavity (12)
In heating gas gas velocity (V*) and this gas velocity (V*Under), described heating gas can carry
Meet between the maximum particle diameter (d) of the described dust granules walked:
Wherein, Re is Reynolds number, Re=ρP×d×g/μ；ρPFor grain density, unit is kg/m3；ρ
For gas density, unit is kg/m3；D is particle diameter, and unit is m；G is acceleration of gravity, single
Position is m/s2；μ is gas viscosity, and unit is Pa s.
3. dry materials method according to claim 1, wherein, the method also includes:
By length, rotating speed, the axial inclination (a) of the described revolving cylinder (1) of regulation, be passed through described
The flow of the heating gas in outer wall sleeve (11) and/or the heating being passed through in described drum cavity (12)
The flow of gas, controls the port of export (B) from described revolving cylinder (1) for the dried described material
Water content during outflow and particle diameter.
4. dry materials method according to claim 3, wherein, controls dried described thing
The water content when port of export (B) from described drum cavity (12) for the material flows out is 1%～5%, is preferably
1%～2%；The particle diameter of the described dust granules that heated gas is taken away is less than 30 μm, preferably 20 μm
Below.
5. the dry materials method according to according to any one of claim 1-4, wherein, outside described
The described heating gas being passed through in wall sleeve (11) and drum cavity (12) is selected from fuel gas, fuel oil
With the high-temperature flue gas producing after solid fuel ignition, the temperature of this high-temperature flue gas is 250～400 DEG C, preferably
300～350 DEG C.
6. dry materials method according to claim 5, wherein, is passed through described drum cavity (12)
In heating gas oxygen content be less than 5%.
7. a rotary drying system, wherein, this system includes:
Rotary drying unit, described rotary drying unit includes at least one revolving cylinder (1), described time
Tumbler cylinder (1) includes outer wall sleeve (11) and drum cavity (12), entering of described rotary drying unit
Mouth end (A) is formed and adds for being all passed through in described outer wall sleeve (11) and drum cavity (12)
The gas introduction part of hot gas and the thing for addition material to be dried in described drum cavity (12)
Material addition portion；With
Dust removing units, described dust removing units connects with the port of export (B) of described rotary drying unit, with
Gas after the steam flowing out in described drum cavity (12), heating and the dust granules carried secretly are carried out
Separating at high temperature.
8. rotary drying system according to claim 7, wherein, outside described dust removing units includes
Set (2) and at least one deduster being arranged in described overcoat (2), described deduster to described go out
After the steam of the dry generation that mouth end (B) flows out, heating, gas and the dust granules carried secretly carry out height
Temperature separates, and the inner cavity chamber of described overcoat (2) connects with the port of export (B) of described rotary drying unit,
Described overcoat (2) be provided with dried material outlet (C), after dedusting gas exhaust outlet (D) and
Dust granules exports (E), and dried material exports (C) from described dried material and discharges, and separation removes
Gas after dirt is discharged from described exhaust outlet (D), and the dust granules after separation goes out from described dust granules
Mouth (E) is discharged.
9. rotary drying system according to claim 8, wherein, described deduster is selected from whirlwind
One or more in separator (3), sack cleaner (4), metallic filter, ceramic filter.
10. rotary drying system according to claim 7, wherein, described revolving cylinder (1)
Axially downwardly tilt from described arrival end (A) towards the described port of export (B) and axial inclination (a) is
1:100～3:100, the rotating speed of described revolving cylinder (1) is 1～10r/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2543643A1 (en) * | 2011-07-07 | 2013-01-09 | Toren Cakir | Installation de séchage universelle à double paroi |
| CN202719855U (en) * | 2012-08-06 | 2013-02-06 | 神华集团有限责任公司 | Double-casing rotary drying kiln |
| CN103344092A (en) * | 2013-07-18 | 2013-10-09 | 王远飞 | Compound convection dryer |
| CN204006066U (en) * | 2014-08-21 | 2014-12-10 | 唐山天和科技开发有限公司 | A kind of fine cleaned coal drying system dust treatment plant |
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2015
- 2015-04-07 CN CN201510162042.XA patent/CN106152734B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2543643A1 (en) * | 2011-07-07 | 2013-01-09 | Toren Cakir | Installation de séchage universelle à double paroi |
| CN202719855U (en) * | 2012-08-06 | 2013-02-06 | 神华集团有限责任公司 | Double-casing rotary drying kiln |
| CN103344092A (en) * | 2013-07-18 | 2013-10-09 | 王远飞 | Compound convection dryer |
| CN204006066U (en) * | 2014-08-21 | 2014-12-10 | 唐山天和科技开发有限公司 | A kind of fine cleaned coal drying system dust treatment plant |
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