CN101445739A - Method for drying lignite through horizontal moving bed - Google Patents
Method for drying lignite through horizontal moving bed Download PDFInfo
- Publication number
- CN101445739A CN101445739A CNA200810240897XA CN200810240897A CN101445739A CN 101445739 A CN101445739 A CN 101445739A CN A200810240897X A CNA200810240897X A CN A200810240897XA CN 200810240897 A CN200810240897 A CN 200810240897A CN 101445739 A CN101445739 A CN 101445739A
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- Prior art keywords
- brown coal
- hot gas
- bed
- horizontal moving
- moving bed
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- 239000003077 lignite Substances 0.000 title claims abstract description 73
- 238000001035 drying Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 56
- 239000007789 gas Substances 0.000 claims description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- MKYLOMHWHWEFCT-UHFFFAOYSA-N Manthidine Natural products C1C2=CC=3OCOC=3C=C2C2C3=CC(OC)C(O)CC3N1C2 MKYLOMHWHWEFCT-UHFFFAOYSA-N 0.000 description 1
- SNFRINMTRPQQLE-JQWAAABSSA-N Montanin Chemical compound O[C@H]([C@@]1(CO)O[C@H]1[C@H]1[C@H]2O3)[C@]4(O)C(=O)C(C)=C[C@H]4[C@]11OC3(CCCCCCCCCCC)O[C@@]2(C(C)=C)C[C@H]1C SNFRINMTRPQQLE-JQWAAABSSA-N 0.000 description 1
- SNFRINMTRPQQLE-OFGNMXNXSA-N Montanin Natural products O=C1[C@@]2(O)[C@@H](O)[C@@]3(CO)O[C@H]3[C@@H]3[C@H]4[C@@]5(C(=C)C)O[C@](CCCCCCCCCCC)(O4)O[C@@]3([C@H](C)C5)[C@@H]2C=C1C SNFRINMTRPQQLE-OFGNMXNXSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QTZPBQMTXNEKRX-UHFFFAOYSA-N Voacristine pseudoindoxyl Natural products N1C2=CC=C(OC)C=C2C(=O)C21CCN(C1)C3C(C(C)O)CC1CC32C(=O)OC QTZPBQMTXNEKRX-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A method for drying lignite through a horizontal moving bed is characterized in that a feeding device is utilized for uniformly distributing the lignite materials on the horizontal moving bed with the thickness thereof being 500mm to 1000mm; the moving bed comprises a plurality of material-carrying boards; the material-carrying boards can distribute wind, conduct the reciprocating movement when being driven by a hydraulic driving device, and enable the materials to tumble when conveying the materials; the material-conveying direction is perpendicular to the speed direction of a primary hot gas; an agitating device is arranged in the lignite materials so as to enable the contact between the lignite and the high-temperature gas to accelerate; a secondary hot gas supplying device is arranged in the lignite materials for supplying high-temperature gas to the middle-upper part of the lignite materials, so that the heat transfer enhancement is achieved. With the adoption of the method, the lignite with large range of particle size can be directly dried, and the stability and the upsizing of drying devices are facilitated.
Description
Technical field
The present invention relates to a kind of brown coal drying technology, particularly a kind of horizontal moving bed formula brown coal drying technology belongs to coal chemical technology.
Background technology
Brown coal are the diagenetic products of peat, i.e. the rock that becomes under physics, biology, chemical action of plant remains.Brown coal are less coals of degree of coalification in the coal resources, belong to soft coal.Compare with other coal, brown coal oxygen level height, ash content is big, and density is little, is easy to spontaneous combustion, and coal dust explodes easily.According to prediction, global brown coal geologic reserve is about 4,000,000,000,000 tons, account for coal reserves 40% a little less than.The brown coal reserves account for about 13% of the total proven reserve of coal in China, be main coal resources a kind of of China, be mainly used in burning, pyrolysis, coking, gasification, extraction montanin wax and brown coal microbial transformation and utilization, play important effect in coal at China's power and chemical industry.The brown coal of China are the inferior fuels of a kind of high volatile (about 50%), high-moisture (about 30%), high ash content (about 30%), low heat value (about 14MJ/kg), low ash smelting point.Mainly be distributed in ground such as northeast, northwest, southwest and North China, concentrate on provinces such as the Inner Mongol, Yunnan and Heilungkiang.Because Economic development is slower, these geographic coal consumptions are compared less with the developed area.Therefore, brown coal need be transported to apart from the distant place that utilizes.Because the existence of high-moisture in the brown coal has caused the transport power waste of the railway system.The brown coal drying technology is exactly with its exsiccant process on the spot, can obtain the steam coal of golf calorific value.This process had both reduced the waste that the railway system is caused for transportation high-moisture brown coal, had important and practical meanings for the efficient cascade utilization of brown coal.
The brown coal drying mode mainly contains fluidized-bed, rotary kiln etc., and drying medium mainly contains flue gas, water vapor etc.From drying principles, fluid bed drying process exists maximization and fluidised form control problem, and its treatment capacity of rotary kiln drying technology is subjected to the heated air quantitative limitation, is difficult to maximize use.From drying medium, because brown coal are a kind of coals of very easily separating out volatile matter, when adopting the oxygen-containing gas drying process, if the problems of excessive heat that the selective oxidation heat release is caused, cause volatile combustion easily, thereby cause the combustion problem of dehumidification system, influence the normal steady running of system.Existing brown coal drying technology many places are in the scale demonstration phase, and the steady running problem is the one of the main reasons that these process scale of puzzlement are used.From brown coal drying The Application of Technology situation, still lack all perfect technology and the technology in aspect such as engineering application and economy at present.Therefore, from present brown coal drying technological development situation, can maximize, execute-in-place efficient brown coal drying technology simple, stable performance is the main direction of research and development always.
Summary of the invention
Relatively poor at the operation stability of existing brown coal drying technology existence in engineering is used and be difficult to maximize problem, the present invention proposes a kind of horizontal moving bed brown coal drying method that adopts.
The objective of the invention is to be achieved through the following technical solutions:
A kind of horizontal moving bed formula brown coal drying method is characterized in that this method comprises the steps:
A. need are carried out exsiccant brown coal material by feeding device be evenly arranged in horizontal moving bed on, the thickness of the bed of material is in 500mm～1000mm scope; Described moving-bed is made up of polylith material containing plate, all has hot gas cloth air port on every block of material containing plate one time, and the material containing plate is reciprocating under the driving of drive unit, realizes rolling and carry material by this to-and-fro movement; The brown coal residence time of material is adjusted in 20～50min scope, and in moving-bed top and brown coal material the cloth agitating device, quicken rolling to material;
B. a hot gas blasts air compartment by gas blower, and by contacting with brown coal behind the cloth air port on the material containing plate, it is vertical that speed of hot gasses direction and material transport direction; A described hot gas is that oxygen content is lower than 10%, temperature is at 120～240 ℃ hot gas;
C. hot gas temperature drops to being higher than between 5～15 ℃ of the dew-point temperatures of dry gas outlet from 120～240 ℃ of inlet, finishes drying process.
D. the brown coal from the horizontal moving bed air compartment that bleeds are regularly regained by retrieving arrangement.
For the middle and upper part of giving the brown coal bed of material provides more high-temperature gas, strengthen gas-particle heat transfer, mass transfer, the present invention can arrange secondary hot gas device for supplying on moving-bed top, and described secondary hot gas is that oxygen content is lower than 10%, temperature is at 120～240 ℃ hot gas.
The present invention compared with prior art, have the following advantages and the high-lighting effect: the present invention has adaptability widely to brown coal material shapes, size; Because moving-bed is made up of polylith material containing plate, can increase the size of moving-bed simultaneously, therefore in engineering reality, maximize easily, good operation stability, convenient maintenance by increasing material containing plate quantity.
Description of drawings
Fig. 1 is a horizontal moving bed formula brown coal drying method synoptic diagram of the present invention.
Among the figure: 1-brown coal inlet; 2-brown coal material; 3-add whipping appts; The outlet of 4-dry gas; 5-hot gas secondary device for supplying; 6-apparatus main body shell; The outlet of 7-brown coal; 8-material containing plate; 9-hot gas inlet; 10-hot gas mixing section; 11-horizontal moving bed.
Embodiment
Below in conjunction with accompanying drawing technical process of the present invention and principle of work are further described
The present invention mainly comprises: brown coal inlet 1, brown coal outlet 7, material containing plate 8, horizontal moving bed 11, hot gas inlet 9, dry gas outlet 4 adds whipping appts 3, be arranged on the hot gas mixing section 10 of material containing plate bottom, hot gas secondary device for supplying 5, apparatus main body shell 6.
Technical process of the present invention and principle of work are:
Because brown coal are a kind of coals of very easily separating out volatile matter, when adopting higher gas of oxygen level or dry air, if the problems of excessive heat that the selective oxidation heat release is caused, be easy to cause volatile combustion, thereby cause the combustion problem of dehumidification system, influence the normal steady running of system, so the medium of dry brown coal is an oxygen content is lower than 10%, temperature is lower than 240 ℃ hot gas.Oxygen level is lower in the gas, can either prevent that like this brown coal from spontaneous combustion taking place in drying process, also can effectively utilize various used heat resources.For further raising system operation stability, arrange anti-flaming, explosion-proof equipment simultaneously in the dehumidification system domestic demand.
Claims (2)
1. a horizontal moving bed formula brown coal drying method is characterized in that this method comprises the steps:
A. need are carried out exsiccant brown coal material by feeding device be evenly arranged in horizontal moving bed on, the thickness of the bed of material is in 500mm～1000mm scope; Described moving-bed is made up of polylith material containing plate, all has hot gas cloth air port on every block of material containing plate one time, and the material containing plate is reciprocating under the driving of drive unit, realizes rolling and carry material by this to-and-fro movement; The brown coal residence time of material is adjusted in 20～50min scope, and in moving-bed top and brown coal material the cloth agitating device, quicken rolling to material;
B. a hot gas blasts air compartment by gas blower, and by contacting with brown coal behind the cloth air port on the material containing plate, it is vertical that speed of hot gasses direction and material transport direction; A described hot gas is that oxygen content is lower than 10%, temperature is at 120～240 ℃ hot gas;
C. hot gas temperature drops to being higher than between 5～15 ℃ of the dew-point temperatures of dry gas outlet from 120～240 ℃ of inlet, finishes drying process.
D. the brown coal from the horizontal moving bed air compartment that bleeds are regularly regained by retrieving arrangement.
2. according to the described horizontal moving bed formula brown coal drying method of claim 1, it is characterized in that: arrange secondary hot gas device for supplying on moving-bed top, described secondary hot gas is that oxygen content is lower than 10%, temperature is at 120～240 ℃ hot gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810240897XA CN101445739B (en) | 2008-12-26 | 2008-12-26 | Method for drying lignite through horizontal moving bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810240897XA CN101445739B (en) | 2008-12-26 | 2008-12-26 | Method for drying lignite through horizontal moving bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101445739A true CN101445739A (en) | 2009-06-03 |
| CN101445739B CN101445739B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810240897XA Expired - Fee Related CN101445739B (en) | 2008-12-26 | 2008-12-26 | Method for drying lignite through horizontal moving bed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845312A (en) * | 2010-05-13 | 2010-09-29 | 河北理工大学 | Lignite drying and carbonization quality-improving tower with reciprocating and turning-back rolling bed |
| CN102102021A (en) * | 2010-12-02 | 2011-06-22 | 吴植仁 | Lignite upgrading furnace |
| CN108043502A (en) * | 2017-12-12 | 2018-05-18 | 新昌县城关升华机械厂 | The medical reciprocating thorough mashing device of Chinese medicine in one kind |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249317A (en) * | 1979-11-05 | 1981-02-10 | Murdock James D | Solar drying apparatus and process for drying materials therewith |
| CN85100817B (en) * | 1985-04-01 | 1988-10-19 | 沃斯特—阿尔卑斯股份公司 | The package unit that is used for the high-moisture brown coal drying |
| CN1033518C (en) * | 1991-05-21 | 1996-12-11 | 西安矿业学院 | Charcoal of xylogen lignite and preparation process thereof |
| EP0819902A1 (en) * | 1996-07-17 | 1998-01-21 | GEA Wärme- und Umwelttechnik GmbH | Plant for steam fluidized bed drying |
| EP1427795A4 (en) * | 2001-08-29 | 2004-12-29 | Generation Technology Res Pty | Coal dewatering system and method |
| CN101260307B (en) * | 2008-04-18 | 2011-08-17 | 清华大学 | Brown coal drying quality-increasing device and technique |
| CN101294765B (en) * | 2008-06-05 | 2010-09-29 | 神华集团有限责任公司 | Low rank coal high temperature flue gas drying method and device |
-
2008
- 2008-12-26 CN CN200810240897XA patent/CN101445739B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845312A (en) * | 2010-05-13 | 2010-09-29 | 河北理工大学 | Lignite drying and carbonization quality-improving tower with reciprocating and turning-back rolling bed |
| CN101845312B (en) * | 2010-05-13 | 2013-04-17 | 河北理工大学 | Lignite drying and carbonization quality-improving tower with reciprocating and turning-back rolling bed |
| CN102102021A (en) * | 2010-12-02 | 2011-06-22 | 吴植仁 | Lignite upgrading furnace |
| CN102102021B (en) * | 2010-12-02 | 2013-04-17 | 吴植仁 | Lignite upgrading furnace |
| CN108043502A (en) * | 2017-12-12 | 2018-05-18 | 新昌县城关升华机械厂 | The medical reciprocating thorough mashing device of Chinese medicine in one kind |
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| Publication number | Publication date |
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| CN101445739B (en) | 2012-07-25 |
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Granted publication date: 20120725 |
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