CN103131493A - Forming and quality improving method for brown coal - Google Patents
Forming and quality improving method for brown coal Download PDFInfo
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- CN103131493A CN103131493A CN2013100814062A CN201310081406A CN103131493A CN 103131493 A CN103131493 A CN 103131493A CN 2013100814062 A CN2013100814062 A CN 2013100814062A CN 201310081406 A CN201310081406 A CN 201310081406A CN 103131493 A CN103131493 A CN 103131493A
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Abstract
The invention relates to a forming and quality improving method for brown coal and belongs to the technical field of brown coal forming and quality improving in coal deep processing. According to the technical scheme, the method comprises the following steps of: first, smashing brown coal to 6mm below, and adjusting the weight percentage of moisture to 20-45%; then, performing pressing forming, drying formed coal in a drier, wherein the drier is divided into front and rear sections; and controlling the drying temperature of the front section of the drier to be 180-240 DEG C and controlling the drying temperature of the rear section of the drier to be 100-140 DEG C. The calorific value of brown coal dried and improved in quality can be improved by 30-70%, so that the transport cost is lowered, dust pollution in transport and use of coal is reduced, and the spontaneous combustion firing period of brown coal in storage and transport process is extremely prolonged. The process is simple and the ton production cost is greatly decreased. Gases discharged in the drying process are mainly hot air containing steam and are free of organic matters or other harmful gases generated by thermal cracking or thermal decomposition of coal, so that the environmental pollution is avoided.
Description
Technical field
The present invention relates to a kind of Moulding Process of Brown Coal method for upgrading, belong to coal deep processing Moulding Process of Brown Coal upgrading technical field.
Background technology
Brown coal are coals of degree of coalification lower-order, and degree of coalification is between peat and bituminous coal, and water content is high, easy-weathering in air; Contain a certain amount of original humic acid, carbon content is low, and oxygen level is high, and hydrogen richness changes greatly: volatile matter is generally 45%～55%.High due to brown coal moisture, calorific value is low, easy-weathering and spontaneous combustion, the transportation cost of unit energy is high, is unfavorable for that long distance carries and store.The thermo-efficiency that brown coal directly burn is lower, and the quantity discharged of greenhouse gases is also very large, is difficult to large-scale develop and utilize.In addition, utilization also is restricted brown coal as feedstock conversion, and brown coal liquefaction, destructive distillation and gasification all need moisture in coal is down to below 10%, if brown coal are processed without upgrading, to be difficult to satisfy multiple user's specification of quality, the key that the brown coal Efficient Development utilizes is processed in the brown coal upgrading.Brown coal upgrading of the present invention refers to brown coal in the processes such as dehydration, moulding and thermolysis, and the Nomenclature Composition and Structure of Complexes of coal changes, and changes into the upgraded coal with approximate bituminous coal character.After brown coal dehydration upgrading processing, because moisture significantly reduces, can make thermal value increase substantially, also can prevent spontaneous combustion of coal, be convenient to transportation and store, be conducive to again the uses such as generating, gas making, chemical industry.Brown coal upgrading technology sun up gets up and substantially can be divided into non-evaporating dehydrolysis upgrading technology, moulding upgrading technology, pyrolysis upgrading technology three major types.1, non-evaporating dehydrolysis upgrading technology, the brown coal non-evaporating dehydrolysis upgrading technology take high temperature and high pressure steam (or high-temperature hot oil) dry technology as representative.It is a kind of physics and chemistry structure that changes brown coal by conditions such as High Temperature High Pressure.It is transformed into the method for upgrading of cleaning, efficient bituminous coal fuel.This novel upgrading technology is that brown coal are directly contacted with high temperature and high pressure steam (or high-temperature hot oil), and moisture is deviate from.Thereby brown coal are shunk become finer and close, hydrophobicity strengthens; 2, pyrolysis upgrading technology, the brown coal pyrolysis started from for 20 beginnings of the century, and typical brown coal pyrolytic process comprises both at home and abroad: the fluid bed fast pyrolysis technique of the L of Germany-R technique, Australia, the multistage rotary kiln technique of China, Chinese solid thermal carriers new distillation process technique etc.The problem that above-mentioned brown coal upgrading technology exists is: technical matters is immature, project investment is large, and environmental pollution is serious, water loss is large.
Summary of the invention
The purpose of this invention is to provide a kind of Moulding Process of Brown Coal method for upgrading, can be golf calorific value with the upgrading of low order Moulding Process of Brown Coal, be easy to the moulded coal of accumulating, solve the problems referred to above that exist in background.
The object of the present invention is achieved like this:
A kind of Moulding Process of Brown Coal method for upgrading comprises moulding and baking operation, first carries out molding procedure, after carry out baking operation; At first described molding procedure is crushed to brown coal granularity below 6 millimeters, and the quality percentage composition of its moisture is adjusted between 20-45%, then carries out pressure forming, becomes moulded coal; Described baking operation, the moulded coal after moulding is sent into drying machine drying, and dryer divides two sections of front and back, dry moulded coal under differing temps, the dryer leading portion is high temperature section, and bake out temperature is controlled between 180-240 ℃, the dryer back segment is low-temperature zone, and bake out temperature is controlled between 100-140 ℃.
Described molding procedure, brown coal add tackiness agent after pulverizing, mixing and stirring, then carry out pressure forming; Its forming pressure is controlled at below 200MPa.After described brown coal are pulverized, granularity is below 6 millimeters.
The drying source of described dryer is kiln gas.
Described dryer is mesh-belt type drier or chain-plate type tunnel furnace dryer; Described mesh-belt type drier or chain-plate type tunnel furnace dryer are divided into forward and backward two groups of tandems and arrange, front networking belt drying machine or chain-plate type tunnel furnace dryer are high temperature section, and rear networking belt drying machine or chain-plate type tunnel furnace dryer are low-temperature zone.
When innovative point of the present invention is the brown coal upgrading, changes background technology and first dry Postforming Technology, adopt the technological process of production of first moulding post-drying, and rationally control forming pressure and bake out temperature, obtained satisfied technique effect.
Positively effect of the present invention: the brown coal thermal value after the upgrading oven dry can be improved 30-70%, reduce transportation cost, reduced the dust pollution in Coal Transport, use procedure, greatly extended the spontaneous combustion time of brown coal in storage and transport process, and technique is simple, and the ton production cost declines to a great extent; Because the gas that discharges is mainly the warm air that contains water vapour, the organism that produces when there is no coal thermo-cracking or thermolysis or other obnoxious flavoures be not so can cause environmental pollution in drying process.
Description of drawings
Accompanying drawing 1 is embodiment of the present invention schema;
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
In an embodiment, at first the net calorific value that will chemically examine through third party's metering test department is that the brown coal of 13.4 million Jiao/kilograms, total water 44.7%, ash content 8.44%, volatile matter 30.03% are crushed to below 6 millimeters, its moisture adjusts to 45%, then carry out pressure forming, described molding procedure, brown coal add tackiness agent after pulverizing, mixing and stirring, then carry out pressure forming.
Moulded coal after moulding is sent into the mesh-belt type drier oven dry, the mesh-belt type drier drying source is kiln gas, mesh-belt type drier is divided into forward and backward two groups of tandems and arranges, front networking belt drying machine is high temperature section, rear networking belt drying machine is low-temperature zone, before and after two sections dry under differing temps, the leading portion bake out temperature is controlled at 220 ℃, the back segment bake out temperature is controlled at 120 ℃.After the invention process, department chemically examines through third party's metering test, can obtain net calorific value is the final briquette prod of upgraded brown coal of 21.88 million Jiao/kilograms, total water 5.5%, ash content 14.45%, volatile matter 35%, its thermal value has improved 63.28%, reduced the dust pollution of transportation, spontaneous combustion time extended to more than 12 months.
Claims (5)
1. Moulding Process of Brown Coal method for upgrading is characterized in that: comprise moulding and baking operation, first carry out molding procedure, after carry out baking operation; At first described molding procedure is crushed to brown coal granularity below 6 millimeters, and the quality percentage composition of its moisture is adjusted between 20-45%, then carries out pressure forming, becomes moulded coal; Described baking operation, the moulded coal after moulding is sent into drying machine drying, and dryer divides two sections of front and back, dry moulded coal under differing temps, the dryer leading portion is high temperature section, and bake out temperature is controlled between 180-240 ℃, the dryer back segment is low-temperature zone, and bake out temperature is controlled between 100-140 ℃.
2. a kind of Moulding Process of Brown Coal method for upgrading according to claim 1 is characterized in that: described molding procedure, and brown coal add tackiness agent after pulverizing, and mixing and stirring is being carried out pressure forming.
3. a kind of Moulding Process of Brown Coal method for upgrading according to claim 1 and 2 is characterized in that: after described brown coal are pulverized, granularity is below 6 millimeters.
4. a kind of Moulding Process of Brown Coal method for upgrading according to claim 1 and 2, it is characterized in that: the drying source of described dryer is kiln gas.
5. a kind of Moulding Process of Brown Coal method for upgrading according to claim 1 and 2, it is characterized in that: described dryer is mesh-belt type drier or chain-plate type tunnel furnace dryer; Described mesh-belt type drier or chain-plate type tunnel furnace dryer are divided into forward and backward two groups of tandems and arrange, front networking belt drying machine or chain-plate type tunnel furnace dryer are high temperature section, and rear networking belt drying machine or chain-plate type tunnel furnace dryer are low-temperature zone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100814062A CN103131493A (en) | 2013-03-14 | 2013-03-14 | Forming and quality improving method for brown coal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100814062A CN103131493A (en) | 2013-03-14 | 2013-03-14 | Forming and quality improving method for brown coal |
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| CN103131493A true CN103131493A (en) | 2013-06-05 |
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| CN2013100814062A Pending CN103131493A (en) | 2013-03-14 | 2013-03-14 | Forming and quality improving method for brown coal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695069A (en) * | 2013-12-20 | 2014-04-02 | 云南省化工研究院 | Extrusion forming method of low-order lignite |
| CN105333724A (en) * | 2015-11-06 | 2016-02-17 | 西安热工研究院有限公司 | Safety storage and transportation method of dried brown coal |
| CN105546945A (en) * | 2016-01-07 | 2016-05-04 | 河北志诚物流有限公司 | Coal briquette drying technology and coal briquette air drying room |
| CN106403555A (en) * | 2016-09-07 | 2017-02-15 | 王振霞 | Traditional Chinese medicine drying and placing device |
| CN114456866A (en) * | 2022-01-17 | 2022-05-10 | 重庆四季金标科技有限公司 | Lignite modification dehydration method and production process thereof and application of modified dehydrated lignite |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045597A (en) * | 1989-03-13 | 1990-09-26 | 盛天义 | Improve the active method of moulded coal |
-
2013
- 2013-03-14 CN CN2013100814062A patent/CN103131493A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045597A (en) * | 1989-03-13 | 1990-09-26 | 盛天义 | Improve the active method of moulded coal |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695069A (en) * | 2013-12-20 | 2014-04-02 | 云南省化工研究院 | Extrusion forming method of low-order lignite |
| CN105333724A (en) * | 2015-11-06 | 2016-02-17 | 西安热工研究院有限公司 | Safety storage and transportation method of dried brown coal |
| CN105546945A (en) * | 2016-01-07 | 2016-05-04 | 河北志诚物流有限公司 | Coal briquette drying technology and coal briquette air drying room |
| CN105546945B (en) * | 2016-01-07 | 2018-08-03 | 河北志诚物流有限公司 | A kind of moulded coal drying process and moulded coal hurricane drier |
| CN106403555A (en) * | 2016-09-07 | 2017-02-15 | 王振霞 | Traditional Chinese medicine drying and placing device |
| CN114456866A (en) * | 2022-01-17 | 2022-05-10 | 重庆四季金标科技有限公司 | Lignite modification dehydration method and production process thereof and application of modified dehydrated lignite |
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Application publication date: 20130605 |