CN107339874A - A kind of brown coal drying device and drying means - Google Patents
A kind of brown coal drying device and drying means Download PDFInfo
- Publication number
- CN107339874A CN107339874A CN201710553077.5A CN201710553077A CN107339874A CN 107339874 A CN107339874 A CN 107339874A CN 201710553077 A CN201710553077 A CN 201710553077A CN 107339874 A CN107339874 A CN 107339874A
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- China
- Prior art keywords
- drying
- lignite
- gas
- drying oven
- brown coal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F26B15/26—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 helical path
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- 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
-
- 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
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
Abstract
A kind of brown coal drying device, including air inlet, gas heater, air blower, discharging opening, conveyer belt, gas outlet, cyclone dust collectors, feeding mouth and drying oven；Wherein, drying oven is in barrel shape, vertical to place, and center of top is feeding mouth, and feeding mouth both sides connecting pipe connects gas outlet, for discharging dry tail gas；Drying oven bottom center is discharging opening, and both sides connecting pipe is connected with air inlet, for conveying dry gas；Conveyer belt is helical form, is 12 ° with horizontal sextant angle；Heater and air blower are sequentially connected on admission line；Cyclone dust collectors are connected on outlet pipe.A kind of method that lignite is dried using the device is also disclosed, there is the advantages of simple in construction, drying efficiency height, significant effect.
Description
Technical field
The present invention relates to a kind of brown coal drying device and drying means, belongs to brown coal drying field, more particularly to a kind of profit
The apparatus and method that lignite is directly dried with gas.
Background technology
Lignite is a kind of low-down coal of degree of coalification, and degree of coalification is between bituminous coal and peat.Lignite inner surface
Product is larger, and moisture is by the intermolecular force or Hydrogen Binding Adsorption of capillary hole wall and water in the gap of lignite particle surface and capillary
Kong Zhong, this causes the moisture of lignite higher, if directly utilizing, needs to expend big energy evaporation water point, moisture is taken away
Substantial amounts of heat so that heat loss due to exhaust gas is serious, and the thermal efficiency is low, and the discharge capacity of greenhouse gases is also very big, is unfavorable for environment guarantor
Shield.Meanwhile chemical change easily occurs in itself for lignite, ignition point is low, and spontaneous combustion easily occurs, due to the presence of more pore,
Easily occur to repeat water suction phenomenon after drying, reduce drying effect, so should not for a long time store and carry over long distances.Though China
So possess abundant lignite reserves, but because these characteristics of lignite are difficult to large-scale develop and utilize, and undried upgrading
The lignite crossed, it is difficult to reach the use standard of modern industry fuel and raw material, therefore invented many brown coal dryings both at home and abroad
Technology meets requirement.
At present, most brown coal drying technology is divided into two classes, and one kind is to be used as the straight of medium using high-temperature flue gas or air
Connect contact drying and using superheated steam as the contact drying for drying medium.The first drying means is referring to Publication No.
CN106382790A prior art, it discloses the high-temperature flue gas using power plant and steam waste heat directly to do to lignite
It is dry, high-temperature flue gas and steam twice laid to power plant, the economy that power plant runs is improved, though this direct drying method
Right expense is low, is but easy to that lignite spontaneous combustion occurs or produces such as carbon monoxide imflammable gas, potential safety hazard be present.
Second method is to carry out indirectly heat drying, such as patent document to lignite with superheated steam or other thermals source
CN106766828A, which discloses a kind of brown coal drying and upgrading and dries Water Sproading, utilizes process system, and it is heat using high-temperature steam
Lignite is dried in source；A kind of brown coal drying method, utilizes radiant tube disclosed in also such as patent document CN103267405A
Lignite is dried for thermal source, casing internal is mounted with least three vibrated beds from top to bottom, and radiant tube from top to bottom heats
Temperature increment, lignite are this with mistake from the discharge of casing bottom after multiple radiant tubes are gradually heated up from casing upper feeding
Vapours and the drying means that radiant tube is thermal source, although improving security, heat-transfer effect is poor, and lignite can not be with warm
Fully contact is measured, it is necessary to consume substantial amounts of heat, meanwhile, it is more for the prior art dried using radiant tube, its inside installation
Individual vibrated bed, cause whole device complicated, control cost increase, and it is tight using vibrated bed transmission lignite, vibrated bed abrasion
Weight, equipment cost increase.Therefore, it is necessary to which more effective, more cost-effective, safer brown coal drying technology improves the profit of lignite
Use efficiency.
The content of the invention
The purpose of the present invention is the safety existing for existing brown coal drying technology, high energy consumption, is easily weighed after lignite dehydration
A kind of new the deficiencies of absorbing moisture, there is provided more efficient, safer brown coal drying apparatus and method.
In order to solve the above problems, the technical solution adopted by the present invention is as follows:
A kind of brown coal drying device, including air inlet, gas heater, air blower, discharging opening, conveyer belt, gas outlet, rotation
Wind deduster, feeding mouth and drying oven；Wherein, drying oven is in barrel shape, vertical to place, and center of top is feeding mouth, pan feeding
Mouth both sides connecting pipe connection gas outlet, for discharging dry tail gas；Drying oven bottom center is discharging opening, both sides connecting pipe
It is connected with air inlet, for conveying dry gas；Conveyer belt is helical form, is 12 ° with horizontal sextant angle；Transmission belt is located in drying oven
The heart, around central shaft screw under drive device driving；Heater and air blower are sequentially connected on admission line；Outlet pipe
Upper connection cyclone dust collectors.
A kind of brown coal drying method, Step 1: lignite raw material enters from the feeding mouth at the top of drying oven, by self gravitation
Fall on the conveyer belt in stove, conveyer belt is spinned motion under the driving of drive device around central shaft, brown in stove by falling into
Coal delivers to discharging opening from spiral from top to bottom；Step 2: while pan feeding, carbon dioxide imports from air inlet, by adding
After hot device is heated to 180-200 DEG C, enter in the presence of air blower from the pipeline for drying furnace bottom both sides in stove；Step 3:
Lignite moves from top to bottom, and from bottom to top, airflow direction is with the lignite direction of motion on the contrary, carbon dioxide is to brown for carbon dioxide gas stream
30-60min is dried in coal；Step 4: the lignite discharge hole for discharge dried, the air-flow of tail gas is being dried compared with the coal dust of small particle
Cyclone dust collectors are flowed out at the top of drying oven to be separated and collect, it is direct after the treatment to dry tail gas under effect
Discharge.
Due to drying tail gas after cyclone dust collectors separate because the speed of conveyer belt spiral decline is slower, stop is added
Time, lignite raw material is dried while hot carbon dioxide fully contacts with lignite raw material, deviates from moisture, passed through
Dried upgraded brown coal dropped out from discharging opening collects directly utilize or storage, and compared with small particle coal dust in drying
Cyclone dust collectors are flowed out at the top of drying oven to be separated and collect, dry tail gas and locating under the airflow function of tail gas
Directly discharged after reason.
The present invention compared with prior art, has the beneficial effect that：
(1) drying device that the present invention uses is simple in construction, and easy to operate, cost is low.
(2) through research, lignite surface by carbon dioxide after drying, after internal surface area is dried than gases such as vapor, air
What is become is smaller, has more pores to disappear, and moisture makes the repetition of upgraded brown coal absorb water ability while abjection becomes more
It is low, that is, drying effect will be more preferably.
(3) carbon dioxide is non-combustible, is not reacted at low temperature with lignite, reduces the risk of blast or lignite spontaneous combustion, whole dry
Dry process is safer.
(4) conveyer belt of the present invention is one-piece auger shape, with 12 ° of horizontal sextant angle, material stable drive, is hardly damaged, and ensure
Fully contacted with carbon dioxide in lignite motion process, drying effect is obvious.
Brief description of the drawings
Fig. 1 is the structural representation of brown coal drying device of the present invention；
1st, air inlet 2, gas heater 3, air blower 4, discharging opening 5, conveyer belt 6, gas outlet 7, cyclone dust removal
Device 8, feeding mouth 9, drying oven
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention
Part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, belongs to the scope of protection of the invention.
As shown in figure 1, the brown coal drying device of the present embodiment, including air inlet 1, gas heater 2, air blower 3, discharging
Mouth 4, conveyer belt 5, gas outlet 6, cyclone dust collectors 7, feeding mouth 8 and drying oven 9；Wherein, drying oven 9 is in barrel shape, vertically
Place, center of top is feeding mouth 8, and the both sides connecting pipe of feeding mouth 8 connects gas outlet 6, for discharging dry tail gas；Drying oven
9 bottom centers are discharging openings 4, and both sides connecting pipe is connected with air inlet 1, for conveying dry gas；Conveyer belt 5 is helical form,
It it is 12 ° with horizontal sextant angle；Transmission belt 5 is located at the center of drying oven 9, around central shaft screw under drive device driving；Air inlet
Gas heater 2 and air blower 3 are sequentially connected on pipeline；Cyclone dust collectors 7 are connected on outlet pipe.
A kind of brown coal drying method, Step 1: lignite raw material enters from the feeding mouth 8 at the top of drying oven 9, by itself weight
Power falls on the conveyer belt 5 in stove, and conveyer belt 5 is spinned motion under the driving of drive device around central shaft, will be fallen into stove
Lignite deliver to discharging opening 4 from spiral from top to bottom；Step 2: while pan feeding, carbon dioxide imports from air inlet 1,
Heated by gas heater 2To 180-200 DEG CAfterwards, enter in the presence of air blower 3 from the pipeline on the bottom both sides of drying oven 9
In stove；Step 3: lignite moves from top to bottom, carbon dioxide gas stream from bottom to top, airflow direction with the lignite direction of motion on the contrary,
30-60min is dried to lignite in carbon dioxide；Step 4: the lignite dried discharges from discharging opening 4, compared with the coal dust of small particle
Cyclone dust collectors 7 are flowed out at the top of drying oven 9 to be separated and collect, dry in the case where drying the airflow function of tail gas
Tail gas directly discharges after the treatment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (4)
1. a kind of brown coal drying device, it is characterised in that including air inlet (1), gas heater (2), air blower (3), discharging
Mouth (4), conveyer belt (5), gas outlet (6), cyclone dust collectors (7), feeding mouth (8) and drying oven (9)；Wherein, drying oven (9) is in
Barrel shape, vertical to place, center of top is feeding mouth (8), feeding mouth (8) both sides connecting pipe connection gas outlet (6), is used for
Tail gas is dried in discharge；Drying oven (9) bottom center is discharging opening (4), and both sides connecting pipe is connected with air inlet (1), for defeated
Dry gas is sent, transmission belt (5) is located at drying oven (9) center, around central shaft screw under drive device driving.
2. brown coal drying device according to claim 1, it is characterised in that the conveyer belt (5) is helical form, with level
Angle is 12 °.
3. brown coal drying device according to claim 1, it is characterised in that the gas is sequentially connected on the admission line
Body heater (2) and the air blower (3)；The cyclone dust collectors (7) are connected on outlet pipe.
4. a kind of drying means of brown coal drying device using described in claim any one of 1-3, comprises the following steps：
Step 1: lignite raw material enters from the feeding mouth at the top of drying oven, fall by self gravitation on the conveyer belt in stove, pass
Send band to be spinned motion around central shaft under the driving of drive device, the lignite fallen into stove is delivered to out from spiral from top to bottom
Material mouth；
Step 2: while pan feeding, carbon dioxide imports from air inlet, after heater is heated to 180-200 DEG C,
Enter in the presence of air blower from the pipeline for drying furnace bottom both sides in stove；
Step 3: lignite moves from top to bottom, carbon dioxide gas stream from bottom to top, airflow direction with the lignite direction of motion on the contrary,
30-60min is dried to lignite in carbon dioxide；
Step 4: the lignite discharge hole for discharge dried, compared with small particle coal dust in the case where drying the airflow function of tail gas from drying oven
Top flows out to cyclone dust collectors and is separated and collects, and dries tail gas and directly discharges after the treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553077.5A CN107339874A (en) | 2017-07-07 | 2017-07-07 | A kind of brown coal drying device and drying means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553077.5A CN107339874A (en) | 2017-07-07 | 2017-07-07 | A kind of brown coal drying device and drying means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107339874A true CN107339874A (en) | 2017-11-10 |
Family
ID=60219032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710553077.5A Pending CN107339874A (en) | 2017-07-07 | 2017-07-07 | A kind of brown coal drying device and drying means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107339874A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779071A (en) * | 2021-01-08 | 2021-05-11 | 中国矿业大学 | Drying and upgrading system for high-water-content coal slime |
| CN112857003A (en) * | 2021-01-08 | 2021-05-28 | 中国矿业大学 | Drying and quality-improving system and method for lump coal and coal slime |
| CN114111305A (en) * | 2021-11-10 | 2022-03-01 | 武冈市红顺炭业有限公司 | Waste heat utilization material drying device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048493A (en) * | 2014-06-30 | 2014-09-17 | 广西大学 | Vertical spiral conveying drying machine |
| CN104194856A (en) * | 2014-09-12 | 2014-12-10 | 呼伦贝尔弘毅煤炭科技发展有限公司 | Method and device for drying lignite and improving quality of lignite |
| CN205002554U (en) * | 2015-09-28 | 2016-01-27 | 哈尔滨华藻生物科技开发有限公司 | Highly efficient drying device |
| EP3162738A1 (en) * | 2015-10-28 | 2017-05-03 | Selmi S.r.l. | Machine for thermal conditioning of food products |
-
2017
- 2017-07-07 CN CN201710553077.5A patent/CN107339874A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048493A (en) * | 2014-06-30 | 2014-09-17 | 广西大学 | Vertical spiral conveying drying machine |
| CN104194856A (en) * | 2014-09-12 | 2014-12-10 | 呼伦贝尔弘毅煤炭科技发展有限公司 | Method and device for drying lignite and improving quality of lignite |
| CN205002554U (en) * | 2015-09-28 | 2016-01-27 | 哈尔滨华藻生物科技开发有限公司 | Highly efficient drying device |
| EP3162738A1 (en) * | 2015-10-28 | 2017-05-03 | Selmi S.r.l. | Machine for thermal conditioning of food products |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112779071A (en) * | 2021-01-08 | 2021-05-11 | 中国矿业大学 | Drying and upgrading system for high-water-content coal slime |
| CN112857003A (en) * | 2021-01-08 | 2021-05-28 | 中国矿业大学 | Drying and quality-improving system and method for lump coal and coal slime |
| CN112779071B (en) * | 2021-01-08 | 2022-08-05 | 中国矿业大学 | Drying and upgrading system for high-water-content coal slime |
| CN114111305A (en) * | 2021-11-10 | 2022-03-01 | 武冈市红顺炭业有限公司 | Waste heat utilization material drying device |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171110 |
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| RJ01 | Rejection of invention patent application after publication |