CN103062999B - Low-rank coal drying and upgrading unit - Google Patents
Low-rank coal drying and upgrading unit Download PDFInfo
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- CN103062999B CN103062999B CN201310000732.6A CN201310000732A CN103062999B CN 103062999 B CN103062999 B CN 103062999B CN 201310000732 A CN201310000732 A CN 201310000732A CN 103062999 B CN103062999 B CN 103062999B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention belongs to the drying equipment and relates to a low-rank coal drying and upgrading unit. The low-rank coal drying and upgrading unit is characterized by comprising a feed bin, a primary preheating and drying rotary kiln, a secondary upgrading rotary kiln and a finished product discharger, which are connected in sequence. A heating kiln heating itself is disposed outside the secondary upgrading rotary kiln. The low-rank coal drying and upgrading unit has the advantages that the process of increasing heat value of the coal according to the feature of high water content in low-rank coal is effective in drying and simple, dust in material is decreased, spontaneous combustion of the coal is prevented effectively, external moisture and internal moisture in the coal are lowered effectively, and coal heat valve is increased evidently. The low-rank coal drying and upgrading unit is also applicable to drying of hydrous minerals.
Description
Technical field
The invention belongs to drying plant, relate to a kind of low-rank coal and dry upgrading device.
Background technology
Low-rank coal moisture higher (be mainly that inherent moisture is higher---in the mineral matter crystallization water 25%), in burning and gasification heat consumption greatly, lower, the coal utilization inefficiency of coal calorific value.The free moisture of coal is dried by air natural and general oven dry heating can obtain certain reduction, if misoperation may increase content of ashes in coal when reducing free moisture, when free moisture is down to when very low, as store the improper spontaneous combustionof coal that causes, meanwhile low-rank coal inherent moisture content is more difficult reduction.
Summary of the invention
The present invention is in order to make up the deficiencies in the prior art, provide a kind of good drying effect, technique simple, reduce dust, prevent that the low-rank coal of spontaneous combustion from drying upgrading device.
The present invention is achieved through the following technical solutions:
Low-rank coal of the present invention is dried upgrading device, its special character is: comprise successively the feeding warehouse that connects, one section of preheating and drying rotary kiln, two sections of upgrading rotary kilns and finished product discharger, the outside of two sections of upgrading rotary kilns is provided with for the heating kiln that adds to conducting self-heating.
Add heating kiln and be provided with combustion-aid air pipe and coal supply tracheae, adding heating kiln, to connect one section of preheating and drying rotary kiln by high temperature waste hot pipe be its supplying high temperature waste hot gas, and adding heating kiln, also to connect two sections of upgrading rotary kilns be its supplying high temperature waste hot gas.
Add heating kiln outside and be also provided with used heat circulation kiln, add heating kiln and after used heat circulation kiln, connect two sections of upgrading rotary kilns again, the entrance of used heat circulation kiln is connected and is added heating kiln by Heating Cyclic pipe, and outlet connects two sections of upgrading rotary kilns by cycle gas manifold trunk.
Between one section of preheating and drying rotary kiln and two sections of upgrading rotary kilns, be provided with the discharger shifting for material.
Feeding warehouse is closed feeding warehouse, and it is also connected gravitational precipitator with the junction of one section of preheating and drying rotary kiln.
The junction of two sections of upgrading rotary kilns and finished product discharger is also connected used heat air-introduced machine, and the outlet of used heat air-introduced machine connects gravitational precipitator and screen collector successively.
Operation principle: first utilize high temperature waste hot gas preheating and drying in one section of preheating and drying rotary kiln, take away portion of water, then carry out external heat oven dry and the oven dry of internal high temperature waste hot gas at two sections of upgrading rotary kilns, take away residual moisture.Finally by used heat air-introduced machine, waste gas and dust are all taken away.Utilize deduster to collect dust, discharge clean waste gas.
The invention has the beneficial effects as follows, the technique of coal being carried out to calorific value raising for the moisture many features of low-rank coal, good drying effect, technique is simple, reduce the dust in material, effectively prevent spontaneous combustionof coal, can be by the calorific value of low-rank coal by 5000 ~ 5500 kilocalories, by this process equipment, coal free moisture is down to 0, inherent moisture is controlled in 0.1 ~ 8% according to user's requirement, coal calorific value is brought up to 6500 ~ 7500 kilocalories, can reduce potassium in low-rank coal simultaneously, the content of sodium material, to improving coal at blast furnace blowing, boiler combustion adds to be hankered ash fusion point and has played certain effect, to energy-saving and cost-reducing, improve coal comprehensive utilization ratio, reduce Coal Transport cost and have remarkable effect.This equipment is also applicable to the dry processing of various enhydrites.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure, 1 feeding warehouse, 2 one sections of preheating and drying rotary kilns, 3 two sections of upgrading rotary kilns, 4 finished product dischargers, 5 add heating kiln, 6 combustion-aid air pipes, 7 coal supply tracheaes, 8 high temperature waste hot pipes, 9 used heat circulation kilns, 10 Heating Cyclic pipes, 11 cycle gas manifold trunks, 12 dischargers, 13 gravitational precipitators, 14 used heat air-introduced machines, 15 screen collectors, 16 rotary kiln rolling rings, 17 supporting roller of rotary kiln bases, 18 materials and high temperature hot gas and collect mouth.
Detailed description of the invention
Accompanying drawing is a kind of specific embodiment of the present invention.
Low-rank coal of the present invention is dried upgrading device, and the outside that comprises the feeding warehouse 1 that connects successively, one section of preheating and drying rotary kiln 2, two sections of upgrading rotary kilns 3 and 4, two sections of upgrading rotary kilns of finished product discharger is provided with for adding heating kiln 5 to conducting self-heating.
Add heating kiln 5 and be provided with combustion-aid air pipe 6 and coal supply tracheae 7, add heating kiln and connect one section of preheating and drying rotary kiln 2 for its supplying high temperature waste hot gas by high temperature waste hot pipe 8, add heating kiln and also connect two sections of upgrading rotary kilns 3 for its supplying high temperature waste hot gas.High temperature waste hot gas is used for drying the materials such as foam coal.
Add heating kiln 5 outsides and be also provided with used heat circulation kiln 9, add heating kiln and after used heat circulation kiln, connect two sections of upgrading rotary kilns again, the entrance of used heat circulation kiln is connected and is added heating kiln by Heating Cyclic pipe 10, and outlet connects two sections of upgrading rotary kilns by cycle gas manifold trunk 11.Like this, make waste hot gas add from the outside again two sections of upgrading rotary kilns of heat.
Between one section of preheating and drying rotary kiln and two sections of upgrading rotary kilns, be provided with the discharger 12 shifting for material.Specifically effect is, one section of preheating and drying rotary kiln 2 discharging, two sections of upgrading rotary kiln 3 chargings.
Feeding warehouse is closed feeding warehouse, and it is also connected gravitational precipitator 13 with the junction of one section of preheating and drying rotary kiln.For tentatively removing the dust in the materials such as foam coal.
The junction of two sections of upgrading rotary kilns and finished product discharger is also connected used heat air-introduced machine 14, and the outlet of used heat air-introduced machine connects gravitational precipitator 13 and screen collector 15 successively.Used heat air-introduced machine 14 is for making better operation forward of waste hot gas, material drying.Gravitational precipitator 13 is for removing the dust in the materials such as foam coal.Screen collector 15 is for finally removing the dust in material.
One section of preheating and drying rotary kiln 2, two sections of upgrading rotary kilns 3 are respectively equipped with several rotary kiln rolling rings 16 and the supporting roller of rotary kiln basis 17 for making its rotation.The junction of high temperature waste hot pipe 8 and one section of preheating and drying rotary kiln 2 has material and high temperature hot gas to collect mouth 18.
Brief Introduction of Process: low-rank coal is sent into closed feeding warehouse 1 with sealed conveying equipment, gravity continuous and quantitative by coal self is sent into one section of preheating and drying rotary kiln 2, in this kiln, utilize the reverse exchange heat exchange of high temperature waste hot gas and coal, coal is carried out to preheating and drying and remove coal free moisture.Enter the heat exchange of two sections of upgrading rotary kilns 3 by external heat in rotary kiln and cycle gas through discharger 12 afterwards, remove inherent moisture in coal according to the different heat transfer character of coal and required inherent moisture resolution temperature, make it to reach raising coal calorific value.In system, borrow cycle gas to take away moisture, reduce material kiln discharge temperature.All waste gases and coal dust are extracted out by two sections of upgrading rotary kilns, 3 afterbody used heat air-introduced machines 14, enter gravitational precipitator 13 and remove fine dusts, enter water curtain dust-removing equipment and reach the effect of purifying exhaust air, can collect condensed water, meet the requirement of environmental protection simultaneously.
This technique can realize temperature, pressure, output visual control, can realize automated operating system.Can be the fuel gas such as coke-stove gas, semicoke coal gas, gas generator coal gas for the gas heating.Also be applicable to the dry processing of various enhydrites.
Claims (5)
1. low-rank coal is dried a upgrading device, it is characterized in that: comprise successively the feeding warehouse that connects, one section of preheating and drying rotary kiln, two sections of upgrading rotary kilns and finished product discharger, the outside of two sections of upgrading rotary kilns is provided with for the heating kiln that adds to conducting self-heating; Add heating kiln and be provided with combustion-aid air pipe and coal supply tracheae, adding heating kiln, to connect one section of preheating and drying rotary kiln by high temperature waste hot pipe be its supplying high temperature waste hot gas, and adding heating kiln, also to connect two sections of upgrading rotary kilns be its supplying high temperature waste hot gas.
2. low-rank coal according to claim 1 is dried upgrading device, it is characterized in that: add heating kiln outside and be also provided with used heat circulation kiln, add heating kiln and after used heat circulation kiln, connect again two sections of upgrading rotary kilns, the entrance of used heat circulation kiln is connected and is added heating kiln by Heating Cyclic pipe, and outlet connects two sections of upgrading rotary kilns by cycle gas manifold trunk.
3. low-rank coal according to claim 1 and 2 is dried upgrading device, it is characterized in that: between one section of preheating and drying rotary kiln and two sections of upgrading rotary kilns, be provided with the discharger shifting for material.
4. low-rank coal according to claim 1 and 2 is dried upgrading device, it is characterized in that: feeding warehouse is closed feeding warehouse, and it is also connected gravitational precipitator with the junction of one section of preheating and drying rotary kiln.
5. low-rank coal according to claim 2 is dried upgrading device, it is characterized in that: the junction of two sections of upgrading rotary kilns and finished product discharger is also connected used heat air-introduced machine, and the outlet of used heat air-introduced machine connects gravitational precipitator and screen collector successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310000732.6A CN103062999B (en) | 2013-01-04 | 2013-01-04 | Low-rank coal drying and upgrading unit |
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| CN201310000732.6A CN103062999B (en) | 2013-01-04 | 2013-01-04 | Low-rank coal drying and upgrading unit |
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| CN103062999A CN103062999A (en) | 2013-04-24 |
| CN103062999B true CN103062999B (en) | 2014-11-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115507621B (en) * | 2022-10-08 | 2023-07-04 | 中国矿业大学 | Continuous lignite drying method |
| CN115523729B (en) * | 2022-10-08 | 2023-07-21 | 中国矿业大学 | Lignite continuous drying device and method |
Citations (6)
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|---|---|---|---|---|
| BR8605728A (en) * | 1985-11-20 | 1987-08-18 | Gulf Canada Ltd | PROCESS FOR IMPROVING THE Heated Coal Heat Value In Particles |
| 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 |
| CN101498546A (en) * | 2009-03-04 | 2009-08-05 | 上海泽玛克敏达机械设备有限公司 | Slewing drum shaped multi-pipe drying mechanism and its use in drying water-containing lignite |
| CN101580727A (en) * | 2009-06-15 | 2009-11-18 | 煤炭科学研究总院 | Cleaning, pyrolysis and oil extracting methods of low-rank coal by internal heat rolling bed |
| CN201754019U (en) * | 2010-08-13 | 2011-03-02 | 辽宁中田干燥设备制造有限公司 | Energy-saving cartridge lignite drying and extraction apparatus |
| CN203116450U (en) * | 2013-01-04 | 2013-08-07 | 山东汉菱电气有限公司 | Low-order coal drying upgrading equipment |
-
2013
- 2013-01-04 CN CN201310000732.6A patent/CN103062999B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8605728A (en) * | 1985-11-20 | 1987-08-18 | Gulf Canada Ltd | PROCESS FOR IMPROVING THE Heated Coal Heat Value In Particles |
| 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 |
| CN101498546A (en) * | 2009-03-04 | 2009-08-05 | 上海泽玛克敏达机械设备有限公司 | Slewing drum shaped multi-pipe drying mechanism and its use in drying water-containing lignite |
| CN101580727A (en) * | 2009-06-15 | 2009-11-18 | 煤炭科学研究总院 | Cleaning, pyrolysis and oil extracting methods of low-rank coal by internal heat rolling bed |
| CN201754019U (en) * | 2010-08-13 | 2011-03-02 | 辽宁中田干燥设备制造有限公司 | Energy-saving cartridge lignite drying and extraction apparatus |
| CN203116450U (en) * | 2013-01-04 | 2013-08-07 | 山东汉菱电气有限公司 | Low-order coal drying upgrading equipment |
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