CN104031714B - The process for upgrading that a kind of brown coal drying is shaping - Google Patents
The process for upgrading that a kind of brown coal drying is shaping Download PDFInfo
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- CN104031714B CN104031714B CN201410262060.0A CN201410262060A CN104031714B CN 104031714 B CN104031714 B CN 104031714B CN 201410262060 A CN201410262060 A CN 201410262060A CN 104031714 B CN104031714 B CN 104031714B
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Abstract
The process for upgrading that a kind of brown coal drying is shaping, through shredder assembly (1) by former brown coal crushing to≤10mm and to fall into bucket-shaped run coal bin (2) stand-by, first former brown coal are delivered in blending transportation heat-exchanger rig (4) by the first transport unit (3) and carry out intensification heating, directly to enter in the funnel of its underpart configuration by the screening plant (5) not installing screen cloth and be delivered to by bucket lifting device (7) in the heat drying apparatus (8) of inclination and form drying brown coal, carry out binder free high-pressure molding through shaped device (9) and form hot moulded coal, hot moulded coal and former brown coal fall into the first transport unit by same ratio and are delivered to blending transportation heat-exchanger rig, sieved by screening plant, be not split on the second transport unit (6) by the mixing brown coal of screen cloth and form moulded coal, fallen into funnel by the mixing brown coal of screen cloth and repeated said process, process for upgrading capacity usage ratio of the present invention is high, Simplified flowsheet, reduce costs.
Description
Technical field
The invention belongs to brown coal Technology field, the process for upgrading that especially a kind of brown coal drying is shaping.
Background technology
China has abundant lignite resource, along with the exhaustion day by day of coal resources, is subject to people gradually payes attention to the exploitation of brown coal.The feature such as high-moisture, low heat value is the restraining factors that brown coal large-scale develop and utilize, and therefore shaping to brown coal drying method for upgrading is guardian technique.
The shaping process for upgrading of brown coal drying comparatively ripe both at home and abroad at present mainly contains following several:
1, German Zemag young brown coal drying technology, first brown coal raw coal is crushed to below 6mm by this technique, recycling steam pipe type drier is by raw coal moisture drying to 12 ~ 18%, brown coal are admitted to special refrigerating unit and cool afterwards, finally brown coal are sent into impact molding machine and in binder free situation, with the pressure extrusion of 500 ~ 2000Bar to produce difform moulded coal.Zemag company was on the basis of punch forming process afterwards, developed rolling forming process again, and its technique is that brown coal are not exclusively dry in steam pipe type drier, afterwards brown coal is sent into roller pressing forming machine compression moulding.
Above-mentioned technique need arrange special moisture-free coal refrigerating unit, and technique is more complicated, and facility investment is large, and can not carry out effective recycling to heat that moisture-free coal is with, thermo-efficiency is low.
2, Australian BCB air stream drying rolling forming process, the heat smoke that this technique produces using gas-fired is as thermal barrier, brown coal are carried out incomplete drying in pneumatic dryer, moisture-free coal is separated with bag-type dust collector by cyclone separator with heat smoke, to be admitted to roller pressing forming machine by helix transporting device shaping for drying brown coal afterwards, and shaping rear brown coal are transported to moulded coal stockyard after cooling.
Hot moisture-free coal is directly delivered to roller pressing forming machine by above-mentioned technique, and the hot moulded coal of generation need arrange refrigerating unit and cool, just stackable afterwards, otherwise easily spontaneous combustion occurs, and whole set process is complicated and capacity usage ratio is low.
3, Chinese HPU-06 hot press forming technology, Shenhua Group associating China Mining University Beijing on the basis of Australian BCB air stream drying rolling forming process, develop the brown coal hot press forming technology with independent intellectual property right, brown coal raw coal is crushed to below 3mm by this technique, the high-temperature flue gas that the burning of recycling brown coal produces is as thermal barrier, brown coal are carried out in pneumatic dryer slight pyrolysis dry, sent into roller pressing forming machine afterwards shaping, shaping rear hot moulded coal, after refrigerating unit cooling, is transported to moulded coal stockyard.
There is same weak point with Australian BCB air stream drying rolling forming process in above-mentioned technique, need arrange special refrigerating unit and cool hot moulded coal, complex process, energy consumption are high.
Summary of the invention
For the weak point of above-mentioned technique, the invention provides the process for upgrading that a kind of brown coal drying is shaping, this process for upgrading is by arranging a kind of blending transportation heat-exchanger rig, moulded coal cooling is carried out good combination with raw coal preheating, thus effectively utilize the waste heat produced in brown coal drying moulding process, remarkable reduction system energy consumption, simultaneously process simplification.
For achieving the above object, the present invention is by the following technical solutions:
The process for upgrading that a kind of brown coal drying is shaping, this process for upgrading uses shredder assembly, run coal bin, the first transport unit, blending transportation heat-exchanger rig, screening plant, the second transport unit, bucket lifting device, heat drying apparatus and shaped device, this process for upgrading launches around above-mentioned each device, the shaping minimum particle size of brown coal drying is set as D, and feature of the present invention is as follows:
First through shredder assembly by former brown coal crushing to the former brown coal of≤10mm granularity, the particle size after cracking of the former brown coal of described D <;
(2) the former brown coal of≤10mm granularity are fallen into bucket-shaped run coal bin stand-by;
(3) first the former brown coal in run coal bin are delivered in blending transportation heat-exchanger rig by the first transport unit and carry out intensification heating, the temperature > of blending transportation heat-exchanger rig 80 DEG C, requires from blending transportation heat-exchanger rig afterbody former brown coal temperature > 80 DEG C out;
(4) blending transportation heat-exchanger rig afterbody former brown coal out are directly entered in the funnel of screening plant bottom configuration by the screening plant not installing screen cloth, and be delivered to by bucket lifting device in the heat drying apparatus of inclination and form drying brown coal, the now temperature > more than 90 DEG C of described drying brown coal;
(5) described drying brown coal carries out binder free high-pressure molding through shaped device and forms hot moulded coal;
(1) above-mentioned-to be (5) called warm;
(6) the former brown coal in the described hot moulded coal produced by above-mentioned warm and run coal bin fall into the first transport unit by same ratio and are delivered to blending transportation heat-exchanger rig, in the first transport unit course of conveying, described hot moulded coal and the former brown coal of more than 90 DEG C contacts by mixing and occur that heat trnasfer makes former brown coal naturally heat up and described hot moulded coal cools and obtain mixing brown coal, now the temperature of described mixing brown coal controls between 30 ~ 80 DEG C, blending transportation heat-exchanger rig afterbody described mixing brown coal temperature > 80 DEG C is out made again by the intensification heating of blending transportation heat-exchanger rig > 80 DEG C,
(7) sieved by screening plant by blending transportation heat-exchanger rig afterbody described mixing brown coal out, the screen cloth specification in screening plant is mated with described D:
Be not split on the second transport unit by the described mixing brown coal of screen cloth and form moulded coal, moulded coal is transported to moulded coal stockyard by the second transport unit and deposits;
The funnel of screening plant bottom configuration is fallen into by the described mixing brown coal of screen cloth, and be delivered to by bucket lifting device in the heat drying apparatus of inclination and again form drying brown coal, the now temperature > 90 DEG C of described drying brown coal, described drying brown coal carries out again forming hot moulded coal after binder free high-pressure molding with for subsequent use through shaped device.
The present invention, compared with background technology, has following characteristics:
1, capacity usage ratio is high.Former brown coal by with dry, shaping after hot moulded coal generation heat transmit, reach pre-heating temperature elevation, take full advantage of the waste heat of hot moulded coal using hot moulded coal as thermal barrier.
2, the energy consumption of process system is effectively reduced.Before former brown coal enter heat drying apparatus, by obtaining preheating with hot moulded coal generation heat trnasfer, effectively can reduce the energy consumption of heat drying apparatus.
3, Simplified flowsheet, reduces costs.Hot moulded coal after high-pressure molding, spontaneous combustion is there is for avoiding it, refrigerating unit need be arranged cool it, and process for upgrading of the present invention is without the need to arranging special refrigerating unit in addition, while pre-pyrogen brown coal, hot moulded coal is cooled, technical process is simplified, and significantly can reduce facility investment and save floor space.
4, the warm of the process of cooling of hot moulded coal and former brown coal has been carried out good combination by the present invention first, effectively can utilize the waste heat of hot moulded coal, greatly improves the capacity usage ratio of the shaping process for upgrading of brown coal drying, significantly reduces system energy consumption.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
In figure, 1-shredder assembly; 2-run coal bin; 3-first transport unit; 4-blending transportation heat-exchanger rig; 5-screening plant; 6-second transport unit; 7-bucket lifting device; 8-heat drying apparatus; 9-shaped device.
Embodiment
Composition graphs 1 and embodiment can explain the present invention in more detail, and the present invention is not limited to the following examples, disclose object of the present invention and are intended to protect all changes and improvements in the scope of the invention.
First through shredder assembly 1 by former brown coal crushing to the former brown coal of≤10mm granularity, the particle size after cracking of the former brown coal of described D <, it is apparent that shredder assembly 1 realizes particle size after cracking to this area.
(2) the former brown coal of≤10mm granularity are fallen into bucket-shaped run coal bin 2 stand-by, require that run coal bin has larger volume.
(3) first the former brown coal in run coal bin 2 are delivered in blending transportation heat-exchanger rig 4 by the first transport unit 3 and carry out intensification heating, the temperature > of blending transportation heat-exchanger rig 4 80 DEG C, require from blending transportation heat-exchanger rig 4 afterbody former brown coal temperature > 80 DEG C out, blending transportation heat-exchanger rig 4 goes out to have outside conveying function, also will have heating function, this is also not difficult to manufacture to this area.
(4) blending transportation heat-exchanger rig 4 afterbody former brown coal out are directly entered in the funnel of screening plant bottom configuration by the screening plant 5 not installing screen cloth, and be delivered to by bucket lifting device 7 in the heat drying apparatus 8 of inclination and form drying brown coal, the now temperature > more than 90 DEG C of described drying brown coal, the moisture in measuring and calculating drying brown coal is reduced to 8 ~ 15% compared with former brown coal.
(5) described drying brown coal carries out binder free high-pressure molding through shaped device 9 and forms hot moulded coal, and shaped device 9 is identical with the roller pressing forming machine in background technology, does not separately repeat.
(1) above-mentioned-be (5) warm of the present invention, all to experience this warm before each start.
(6) the former brown coal in the described hot moulded coal produced by above-mentioned warm and run coal bin 2 fall into the first transport unit 3 by same ratio and are delivered to blending transportation heat-exchanger rig 4, described in the first transport unit 3 course of conveying, hot moulded coal and former brown coal contacts by mixing and occur that heat trnasfer makes former brown coal naturally heat up and described hot moulded coal cools and obtain mixing brown coal, now the temperature of described mixing brown coal controls between 30 ~ 80 DEG C, blending transportation heat-exchanger rig afterbody described mixing brown coal temperature > 80 DEG C is out made again by the intensification heating of blending transportation heat-exchanger rig > 80 DEG C.
(7) sieved by screening plant by blending transportation heat-exchanger rig afterbody described mixing brown coal out, the screen cloth specification in screening plant is mated with described D:
Be not split on the second transport unit by the described mixing brown coal of screen cloth and form moulded coal, moulded coal is transported to moulded coal stockyard by the second transport unit and deposits;
The funnel of screening plant bottom configuration is fallen into by the described mixing brown coal of screen cloth; and be delivered to by bucket lifting device in the heat drying apparatus of inclination and again form drying brown coal; the now temperature > more than 90 DEG C of described drying brown coal; described drying brown coal carries out again forming hot moulded coal after binder free high-pressure molding with for subsequent use through shaped device; normal production so circulates, and does not store hot moulded coal after shutdown.
The outstanding feature that the present invention has compared with background technology is described above.
Claims (1)
1. the process for upgrading that a brown coal drying is shaping, this process for upgrading uses shredder assembly (1), run coal bin (2), the first transport unit (3), blending transportation heat-exchanger rig (4), screening plant (5), the second transport unit (6), bucket lifting device (7), heat drying apparatus (8) and shaped device (9), this process for upgrading launches around above-mentioned each device, the shaping minimum particle size of brown coal drying is set as D, its feature in this way:
First through shredder assembly (1) by former brown coal crushing to the former brown coal of≤10mm granularity, the particle size after cracking of the former brown coal of described D <;
(2) the former brown coal of≤10mm granularity are fallen into bucket-shaped run coal bin (2) stand-by;
(3) first the former brown coal in run coal bin (2) are delivered in blending transportation heat-exchanger rig (4) by the first transport unit (3) and carry out intensification heating, the temperature > of blending transportation heat-exchanger rig (4) 80 DEG C, requires from blending transportation heat-exchanger rig (4) afterbody former brown coal temperature > 80 DEG C out;
(4) blending transportation heat-exchanger rig (4) afterbody former brown coal out are directly entered in the funnel of screening plant (5) bottom configuration by the screening plant (5) not installing screen cloth, and formation drying brown coal, now the temperature > 90 DEG C of described drying brown coal in the heat drying apparatus (8) of inclination is delivered to by bucket lifting device (7);
(5) described drying brown coal carries out binder free high-pressure molding through shaped device (9) and forms hot moulded coal;
(1) above-mentioned-to be (5) called warm;
(6) the former brown coal in the described hot moulded coal produced by above-mentioned warm and run coal bin (2) fall into the first transport unit (3) by same ratio and are delivered to blending transportation heat-exchanger rig (4), in the first transport unit (3) course of conveying, described hot moulded coal and the former brown coal of more than 90 DEG C contacts by mixing and occur that heat trnasfer makes former brown coal naturally heat up and described hot moulded coal cools and obtain mixing brown coal, now the temperature of described mixing brown coal controls between 30 ~ 80 DEG C, blending transportation heat-exchanger rig (4) afterbody described mixing brown coal temperature > 80 DEG C is out made again by the intensification heating of blending transportation heat-exchanger rig (4) > 80 DEG C,
(7) sieved by screening plant (5) by blending transportation heat-exchanger rig (4) afterbody described mixing brown coal out, the screen cloth specification in screening plant (5) is mated with described D:
Be not split on the second transport unit (6) by the described mixing brown coal of screen cloth and form moulded coal, moulded coal is transported to moulded coal stockyard by the second transport unit (6) and deposits;
The funnel of screening plant (5) bottom configuration is fallen into by the described mixing brown coal of screen cloth, and be delivered in the heat drying apparatus (8) of inclination again form drying brown coal by bucket lifting device (7), the now temperature > 90 DEG C of described drying brown coal, described drying brown coal again forms hot moulded coal with for subsequent use after shaped device (9) carries out binder free high-pressure molding.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168694A (en) * | 2006-10-27 | 2008-04-30 | 神华国际贸易有限责任公司 | Hot forming method and device without bonding agent for low metamorphic coal |
| CN101294765A (en) * | 2008-06-05 | 2008-10-29 | 神华集团有限责任公司 | Low rank coal high temperature flue gas drying method and device |
| CN102559319A (en) * | 2011-12-22 | 2012-07-11 | 中信重工机械股份有限公司 | Integral process and device for crushing, drying, forming and upgrading lignite containing moisture |
| CN103045321A (en) * | 2012-12-28 | 2013-04-17 | 山东博润工业技术股份有限公司 | Method for drying and upgrading lignite |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168694A (en) * | 2006-10-27 | 2008-04-30 | 神华国际贸易有限责任公司 | Hot forming method and device without bonding agent for low metamorphic coal |
| CN101294765A (en) * | 2008-06-05 | 2008-10-29 | 神华集团有限责任公司 | Low rank coal high temperature flue gas drying method and device |
| CN102559319A (en) * | 2011-12-22 | 2012-07-11 | 中信重工机械股份有限公司 | Integral process and device for crushing, drying, forming and upgrading lignite containing moisture |
| CN103045321A (en) * | 2012-12-28 | 2013-04-17 | 山东博润工业技术股份有限公司 | Method for drying and upgrading lignite |
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