CN101922859B - Grading crushing dryer for upgrading lignite - Google Patents
Grading crushing dryer for upgrading lignite Download PDFInfo
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- CN101922859B CN101922859B CN 201010279415 CN201010279415A CN101922859B CN 101922859 B CN101922859 B CN 101922859B CN 201010279415 CN201010279415 CN 201010279415 CN 201010279415 A CN201010279415 A CN 201010279415A CN 101922859 B CN101922859 B CN 101922859B
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Abstract
The invention relates to a grading crushing dryer for upgrading lignite, which realizes the optimized combination of winnowing, crushing, drying and other technologies, solves the problems of high power consumption, difficult system regulation and control, instable running, low safety performance and the like in the existing lignite drying technology and has the advantages of safety, energy saving, high efficiency, stability and the like. The grading crushing dryer comprises a vertically-arranged straight tube and at least one crushing device arranged at the bottom, wherein a pulse section is arranged at the upper part of the straight tube; a contraction section is arranged in the middle of the straight tube; the contraction section is connected with a feeding device; the pulse section is connected with a dust collecting and separating device; the bottom of the straight tube is communicated with high temperature flue gas; the discharge end of large granules of the straight tube is connected with the crushing device; an air outlet of the crushing device is connected with the pulse section; meanwhile, the crushing equipment is connected with high temperature flue gas.
Description
Technical field
The present invention relates to a kind of classification that is used for the brown coal upgrading and pulverize drier.
Background technology
Characteristics such as brown coal are low because of its calorific value, water content is high, easy-weathering is broken, easy spontaneous combustion have been brought a lot of difficulties to aspects such as its burning, transportation, storages.Behind brown coal drying, make moulded coal with certain particle size and compactness, its various aspects of performance all is better than the brown coal raw coal, and can effectively solve problems such as brown coal easy-weathering fragmentation in transportation, storage process, easy spontaneous combustion.Inflammable, explosive in view of brown coal, be heated volatile, in gas the good characteristics of free mobility, its dry research emphasis concentrates on the application of quick drying technology and equipment, as pneumatic conveyer dryer.
Pneumatic conveying drying is a kind of continous way fluidization of solid drying means.Contain and fully mix with drying medium after wet-milling/granular brown coal are sent into pneumatic conveyer dryer, realize fast dewatering, and in follow-up cleaner, realize and the separating of drying medium.Because of the pneumatic conveying drying of brown coal because of having characteristics such as thermal efficiency height, rate of drying be fast, simple in structure, have broad application prospects, those skilled in the art have carried out a large amount of application studies to the pneumatic conveying drying technology of brown coal in recent years.Yet because of brown coal have inflammable, explosive, the characteristics such as volatile of being heated, conventional pneumatic conveyer dryer has many limitation when being applied to brown coal drying, be mainly reflected in:
(1) drying principles of pneumatic conveying drying has determined it to going into coal particle size higher requirement to be arranged, and is to guarantee quick-drying effect, before raw coal enters pneumatic conveyer dryer, needs according to cross section gas speed in the pipe that is provided with raw coal to be crushed to more accurate particle size range.Usually the thick broken particle diameter of one-level is bigger, can't satisfy dry granularity requirements, need increase two-stage crushing, and generally the raw coal after thick breaking still needs all to break through meticulous, and this has just caused the problem that capacity usage ratio is low, power consumption is high.
(2) Chang Gui pneumatic conveyer dryer is fast the material of even particle size distribution all to be carried into air outlet by high temperature at a high speed, and carries out product at follow-up dust arrester installation and collect.But the design feature of brown coal determines its fragmentation can not reach well-proportioned granularity, and throughput is difficult to and its coupling when going into coal amount generation fluctuation, can't be taken away fast so always have large coal particles in drier, hoards in the gas flow tube bottom.The large coal particles that accumulates under the condition of high temperature very easily causes spontaneous combustion, has serious potential safety hazard.If continuously bulky grain is effluxed by outer arranging devices such as discharge valves, then make tumbler long-term work such as discharge valve again in hot environment, very high to requirements such as equipment material, device sealings, have a strong impact on service life of device.
(3) all drying and dehydrating processes are all finished in pipe in the Chang Gui pneumatic conveyer dryer, and the characteristics that the brown coal drying amount is big, moisture is high easily cause the drier load big, and under drying load has situation than great fluctuation process, easily cause the whole moisture of product undesirable, make the controllability of whole drying device poor.
(4) have inflammable, explosive, the characteristics such as volatile of being heated because of brown coal, so the structural design of its drying equipment must consider urgent cooling, prevent measure such as spontaneous combustion, eliminating the potential safety hazard that may exist, and conventional pneumatic conveyer dryer needleless is to the safety design of brown coal character characteristics.
Summary of the invention
The present invention is exactly for solving the dry problem of high-volatile, high-moisture, easy spontaneous combustion brown coal, providing a kind of and utilize hot flue gas to pulverize drier as the classification that is used for the brown coal upgrading that is used for brown coal drying of drying medium.This equipment has been realized the optimum organization of technology such as selection by winnowing, pulverizing, drying, has solved the power consumption height, the system regulation difficulty that exist in the present brown coal drying technology, problem such as fluctuation of service, security performance are low.Drying appliance is pulverized in a kind of classification that is used for brown coal drying provided by the invention advantages such as safe, energy-conservation, efficient, stable.
For achieving the above object, the present invention adopts following technical scheme:
Drier is pulverized in a kind of classification that is used for the brown coal upgrading, and it comprises at least one the disintegrating apparatus of straight tube bottom straight tube of vertically setting up; Straight tube top is pulse burst, and the middle part is a contraction section, and wherein contraction section is connected with feed arrangement; Pulse burst is connected with the separator that gathers dust; The bottom of straight tube is communicated with high-temperature flue gas, and straight tube bulky grain discharge end then is connected with described disintegrating apparatus, and the air outlet of disintegrating apparatus is connected with pulse burst, and disintegrating apparatus also is connected with high-temperature flue gas simultaneously.
Described straight tube top is provided with safety anti-explosive device and spray cooling device.
Described safety anti-explosive device is the burst disk that is arranged on the straight tube top.
Described spray cooling device is wet alarm valve and supply equipment, and wet alarm valve and the supply equipment automatic sprinkler interior with being arranged on pulse burst is connected.
Described disintegrating apparatus has two, is the fan mill.
Classification of the present invention is pulverized drier and is made up of the straight tube that has pulse burst and the fan mill that is arranged on the straight tube bottom or the disintegrating apparatus of an equivalent effect.Brown coal to be dried enter into classification by feed arrangement at contraction section and pulverize in the drier, fully contact with hot flue gas from the drier bottom, the sector-style of going forward side by side choosing: the brown coal that satisfy the particle diameter requirement are carried secretly rising fast by straight tube by one tunnel hot flue gas, and realize dehydrating in uphill process; Do not meet then being settled down to the fan mill of straight tube below or rising in the disintegrating apparatus of equivalent effect and further pulverized of granularity requirements than gathering coal/grain.Simultaneously, the hot flue gas in another road also enters into the fan mill, and brown coal fully contact with hot flue gas in the crushing process of fan mill, realize the function of predrying and enhanced heat exchange.For guaranteeing the stability and the continuity of the operation of classification pulverizing drier, below straight tube, be arranged in parallel two or many desk fans mill, guaranteeing has platform fully in the running.In fan mill through pulverizing, carrying out selection by winnowing once more in the coal dust of predrying back generation is transported to classification pulverizing drier again by hot flue gas the pulse burst, the coal dust that meets granularity and moisture requirement will be carried secretly the quick straight tube that passes through that rises by hot flue gas, finish final depth drying.Do not meet the coal cinder of granularity and moisture requirement/grain once more sedimentation enter in the fan mill, pulverize once more and dry, after reaching desired granularity and moisture, fast by straight tube, enter the follow-up separator that gathers dust with hot flue gas.
Pulverize the safety in operation of drier for guaranteeing classification, in the appropriate location design and installation of straight tube top burst disk or the antiknock device that plays equivalent effect form, and suitable position is provided with sprinker system above feeding mouth, this device is a kind of wet type automatic fire extinguishing system, is made up of automatic sprinkler wet alarm valve and supply equipment.Environment temperature in drier is pulverized in classification surpasses warning value, and shower nozzle unlatching, water outlet, ductwork pressure descend, and the warning downstream pressure descends and causes valve plate to be opened, and connects pipe network and water source, the cooling of supplying water.
The invention has the beneficial effects as follows: functions such as selection by winnowing, pulverizing, drying that classification pulverizing drier complexes are integrated are used for brown coal drying and have multiple advantage:
(1) is provided with reducing mechanism such as fan mill because of drier straight tube bottom,, only needs the one-level disintegrating apparatus to meet the demands, reduced equipment dynamic consumption, saved the cost of disintegrating apparatus so the brown coal particle size range to be dried that enters drier is required reduction.
(2) coal pulverizer combines with the ingenious of dry straight tube, has solved large coal particles and has hoarded a difficult problem in the drier bottom in a large number, has greatly improved the security performance of device operation.
(3) in coal pulverizer, can realize processes such as predrying, pulverizing, conveying simultaneously, share the drying load of follow-up dry run to a great extent, can effectively guarantee the stability of drier operation large coal particles.
(4) explosion-protection equipment and sprinker system have been installed, can effectively guarantee the operational reliability of drier, as in case of emergency can be under the situation that system's overtemperature and oxygen content exceed standard by the water injector of the chain control of DCS, realize in drier, spraying water smoke fast to reduce drying medium temperature and oxygen content concentration, reach the purpose that eliminates safe hidden trouble.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein, 1. feed arrangement, 2. burst disk, 3. automatic sprinkler, 4. pulse burst, 5. contraction section, 6. fan mill,
7. wet alarm valve and supply equipment, PS: brown coal to be dried, FW: fire water, FLG: high-temperature flue gas.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment this present invention is described further.
Among Fig. 1, classification is pulverized drier and is made up of the straight tube that has pulse burst 4 and the fan mill 6 that is arranged on the straight tube bottom or the disintegrating apparatus of an equivalent effect.Brown coal PS to be dried enters in the drier at contraction section 5 by feed arrangement 1, fully contact with hot flue gas FLG from the drier bottom, the sector-style of going forward side by side choosing: the brown coal that satisfy the particle diameter requirement are carried secretly rising fast by straight tube by one tunnel hot flue gas, and realize dehydrating in uphill process; Do not meet then being settled down to the fan mill 6 of straight tube below or rising in the disintegrating apparatus of equivalent effect and further pulverized of granularity requirements than gathering coal/grain.Simultaneously, the hot flue gas in another road also enters into fan mill 6, and brown coal fully contact with hot flue gas in the crushing process of fan mill, realize the function of predrying and enhanced heat exchange.For guaranteeing the stability and the continuity of the operation of classification pulverizing drier, below straight tube, be arranged in parallel two or many desk fans mill, guaranteeing has platform fully in the running.In fan mill 6 through pulverize, predrying after the coal dust of generation be transported to by hot flue gas again in the pulse burst 4 of drier and carry out selection by winnowing once more, the coal dust that meets granularity and moisture requirement will be carried secretly the quick straight tube that passes through that rises by hot flue gas, finish final depth drying.Do not meet the coal cinder of granularity and moisture requirement/grain once more sedimentation enter in the fan mill 6, pulverize once more and dry, after reaching desired granularity and moisture, fast by straight tube, enter the follow-up separator that gathers dust with hot flue gas.
Pulverize the safety in operation of drier for guaranteeing classification, in the appropriate location design and installation of straight tube top burst disk 2 or the antiknock device that plays equivalent effect form, and suitable position is provided with sprinker system above feeding mouth, this device is a kind of wet type automatic fire extinguishing system, is made up of automatic sprinkler 3, wet alarm valve and supply equipment 7.Environment temperature in drier surpasses warning value, and shower nozzle unlatching, water outlet, ductwork pressure descend, and the warning downstream pressure descends and causes valve plate to be opened, and connects pipe network and FW: fire water, the cooling of supplying water.
Claims (5)
1. drier is pulverized in a classification that is used for the brown coal upgrading, it is characterized in that, it comprises at least one the disintegrating apparatus of straight tube bottom straight tube of vertically setting up; Straight tube top is pulse burst, and the middle part is a contraction section, and wherein contraction section is connected with feed arrangement; Pulse burst is connected with the separator that gathers dust; The bottom of straight tube is communicated with high-temperature flue gas, and straight tube bulky grain discharge end then is connected with described disintegrating apparatus, and the air outlet of disintegrating apparatus is connected with pulse burst, and disintegrating apparatus also is connected with high-temperature flue gas simultaneously.
2. drier is pulverized in the classification that is used for the brown coal upgrading as claimed in claim 1, it is characterized in that described straight tube top is provided with safety anti-explosive device and spray cooling device.
3. drier is pulverized in the classification that is used for the brown coal upgrading as claimed in claim 2, it is characterized in that described safety anti-explosive device is the burst disk that is arranged on the straight tube top.
4. drier is pulverized in the classification that is used for the brown coal upgrading as claimed in claim 2, it is characterized in that described spray cooling device is wet alarm valve and supply equipment, and wet alarm valve and the supply equipment automatic sprinkler interior with being arranged on pulse burst is connected.
5. drier is pulverized in the classification that is used for the brown coal upgrading as claimed in claim 1, it is characterized in that described disintegrating apparatus has two, is the fan mill.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010279415 CN101922859B (en) | 2010-09-13 | 2010-09-13 | Grading crushing dryer for upgrading lignite |
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| CN 201010279415 CN101922859B (en) | 2010-09-13 | 2010-09-13 | Grading crushing dryer for upgrading lignite |
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| CN101922859A CN101922859A (en) | 2010-12-22 |
| CN101922859B true CN101922859B (en) | 2011-09-28 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102200378A (en) * | 2011-03-08 | 2011-09-28 | 泸州北方化学工业有限公司 | Panel hot plate rotary vibrating drying device |
| CN102661658B (en) * | 2012-05-21 | 2014-06-18 | 山东天力干燥股份有限公司 | Air flow and high frequency combined lignite drying device and process |
| CN106123559A (en) * | 2016-07-14 | 2016-11-16 | 滨海金地矿业工程技术(北京)有限公司 | The most quickly temperature regulating device and the coal drying system of a kind of coal drying system |
Citations (7)
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|---|---|---|---|---|
| DD155451A1 (en) * | 1980-02-15 | 1982-06-09 | Gerhard Phenn | DEVICE FOR THE CONTINUOUS TEMPERING OF BROWN COAL |
| DE3616218C1 (en) * | 1986-05-14 | 1987-07-02 | Rheinische Braunkohlenw Ag | Method for continuous drying of water-containing bulk materials |
| US5373648A (en) * | 1990-09-18 | 1994-12-20 | Uet Umwelt- Und Energietechnik Gmbh | Process and device for drying solid materials in an indirectly heated fluidized bed |
| CN2191398Y (en) * | 1993-07-23 | 1995-03-08 | 沈阳市三友干燥设备厂 | Whirlwind flash drier |
| CN201434561Y (en) * | 2009-03-17 | 2010-03-31 | 沈阳新奇日化有限责任公司 | Machine for continuous spraying, fluidizing, granulating and drying |
| CN101717681A (en) * | 2009-11-25 | 2010-06-02 | 西安热工研究院有限公司 | Solid fuel upgrading reaction device and process thereof |
| CN201803582U (en) * | 2010-09-13 | 2011-04-20 | 山东天力干燥设备有限公司 | Grading crushing drier for brown coal quality enhancement |
-
2010
- 2010-09-13 CN CN 201010279415 patent/CN101922859B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD155451A1 (en) * | 1980-02-15 | 1982-06-09 | Gerhard Phenn | DEVICE FOR THE CONTINUOUS TEMPERING OF BROWN COAL |
| DE3616218C1 (en) * | 1986-05-14 | 1987-07-02 | Rheinische Braunkohlenw Ag | Method for continuous drying of water-containing bulk materials |
| US5373648A (en) * | 1990-09-18 | 1994-12-20 | Uet Umwelt- Und Energietechnik Gmbh | Process and device for drying solid materials in an indirectly heated fluidized bed |
| CN2191398Y (en) * | 1993-07-23 | 1995-03-08 | 沈阳市三友干燥设备厂 | Whirlwind flash drier |
| CN201434561Y (en) * | 2009-03-17 | 2010-03-31 | 沈阳新奇日化有限责任公司 | Machine for continuous spraying, fluidizing, granulating and drying |
| CN101717681A (en) * | 2009-11-25 | 2010-06-02 | 西安热工研究院有限公司 | Solid fuel upgrading reaction device and process thereof |
| CN201803582U (en) * | 2010-09-13 | 2011-04-20 | 山东天力干燥设备有限公司 | Grading crushing drier for brown coal quality enhancement |
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| CN101922859A (en) | 2010-12-22 |
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