CN103673508B - Method for drying, screening and collecting graphite powder - Google Patents
Method for drying, screening and collecting graphite powder Download PDFInfo
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- CN103673508B CN103673508B CN201210323941.XA CN201210323941A CN103673508B CN 103673508 B CN103673508 B CN 103673508B CN 201210323941 A CN201210323941 A CN 201210323941A CN 103673508 B CN103673508 B CN 103673508B
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Abstract
The invention relates to a method for drying, screening and collecting graphite powder. The method comprises the steps that firstly, the graphite powder is dried through the differential dying technology, then, the graphite powder is screened and collected through airflow classification, and finally graphite products at different levels are obtained. The method for drying, screening and collecting the graphite powder has the advantages that the whole system continuously operates in a sealing mode, energy is saved, consumption is reduced, safety and environmental friendliness are achieved, operation is continuous, the mesh number of the graphite products is increased, and the economic benefits and social benefits of an enterprise are increased. Compared with the prior art, the method for drying, screening and collecting the graphite powder further has the advantages of reducing the labor intensity of workers, reducing contact between the operation workers and the graphite powder, preventing the harm of the graphite powder to the respiratory systems of the workers, greatly improving an operation site, and achieving cleanness and tidiness of the environment of the whole production site.
Description
Technical field
The technical field that the screening that the present invention relates to the energy-saving and cost-reducing of graphite composite powder drying and product is collected, exactly adopt a kind of micropowder dryer dry in order to reduce energy consumption of unit product to graphite composite powder, adopt airflow screening to product-collecting simultaneously, diversify and quality.
Background technology
Because graphite products price is low for a long time, graphite industry is not paid attention to always, and the mode of production is rough so far, and consume energy huge, site environment is severe.Along with expansion and the discovery of socio-economic development and graphite products application function, graphite products rapid rise of price, energy-conserving and environment-protective simultaneously require increasingly stringent, therefore need a kind of new mode of production badly and are improved.Meanwhile, the price of graphite products is relevant with order number, and be less than 80 orders and be greater than 150 object product prices higher, and middle order number product price is low, therefore the screening of product also seems important.
General employing swing roller drying mode in existing graphite composite powder dry run, then by manually collecting product, putting into screening bed and sieving.Its course of work is:
Add in swing roller drying machine with being about the graphite composite powder slurry continuous uniform of 30% by moisture content after filtration, under the indirect that cylinder periphery 400 DEG C is coal-fired, moisture evaporates rapidly.The moisture content of material is less than 0.5% after drying, being loose granular material, being drawn off, then by manually collecting by swing roller drying machine discharge end.
The graphite composite powder collected by manually adding screening bed, carries out classification by mechanical grading to product again, product is divided into different several order numbers, then by packing machine by manually packing.
Above-mentioned graphite production procedure Problems existing is:
1. energy consumption aspect: original graphite composite powder production technology adopts swing roller drying mode, and be contact drying, heat transfer coefficient is little, the mode of production is rough simultaneously, and therefore energy consumption is relatively large.
2. product-collecting aspect: as can be seen from above-mentioned graphite production procedure, automaticity is lower, and employing artificially collects, and therefore product yield is low; Simultaneously the graphite powder of collection is all dropped into screening bed sieved by artificial, therefore sieve load large, product quality is not high.
3. site environment aspect: adopt the graphite semi-finished product after roller drying to screen processing again through artificial or miscellaneous equipment, employing be intermittently operated, therefore have material to leak unavoidably, simultaneously because graphite powder light weight easily sticks, therefore site environment is severe.
4. labour intensity aspect: prior art is intermittently operated, and the operation cycle is long, hand labor intensity is large, inefficiency.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide the method that the drying of a kind of graphite composite powder and screening are collected, namely adopt the dry graphite composite powder of micropowder dryer and adopt airflow screening collection product.
The object of the present invention is achieved like this:
A kind of graphite composite powder is dry and sieve collection method, the steps include:
A. graphite composite powder is dry
Lump coal is after coal breaker is pulverized, by coal dust surge tank, through belt conveyor, enter chain furnace as fuel, simultaneously air after air cleaner filters by blower after be divided into two-way, a road directly enters chain furnace as combustion air, and first the 750-820 DEG C of high-temperature flue gas produced in chain furnace enter air heat exchanger, add hot-air to 400 DEG C as drying medium, the low-temperature flue gas after heat exchange enters the heat medium of fresh water (FW) heat exchanger as fresh water (FW); Another road enters air heat exchanger and carries out heat exchange; The high temperature air being heated to 400 DEG C through air heat exchanger enters micropowder dryer, fully contacts at micropowder dryer with graphite powder, and heat drying makes the wet part evaporation in graphite powder;
B. graphite composite powder screening is collected
Dried graphite powder is carried secretly by air and is carried out classification layer by layer: (1) the gravity settling chamber of bulky grain in micropowder dryer upper end carries out sedimentation, the bulky grain graphite powder settled down is collected and is entered the first screening bed by rotary valve and sieve, first waste residue is screened out, be then 32 orders by graphite products screening, 50 orders, 80 order, three order number grades enter 32 order product storage tanks, 50 order product storage tanks and 80 order product storage tanks respectively; (2) fine grained enters the second screening bed by getting off through cyclone collection by rotary valve and sieves, and screening is 80 orders, 100 orders, 150 order, three order number grades enter corresponding 80 order product storage tanks, 100 order product storage tanks and 150 order product storage tanks respectively; (3) cyclone separator enters sack cleaner to the graphite dust do not eliminated with air and carries out further dedusting collection, and the graphite powder collected enters negative 150 order product storage tanks through rotary valve; First tonnage packing machine, the second tonnage packing machine and Small bag packaging machine are set in product storage tank lower end, packing machine by guide rail move around to screening product pack.Air after the abundant dedusting of sack cleaner is discharged by air-introduced machine.
Be compared with the prior art, the beneficial effect of feature of the present invention and generation is:
1, the topmost feature of the present invention is energy-conservation, the micropowder dryer that the present invention adopts, and its drying mode is that material directly contacts with hot blast, heat transfer coefficient is large, and drying time is short, and drying efficiency is high, therefore energy-saving effect is obvious, compared with original mode of production energy-conservation about 60%.Meanwhile, heat chain furnace being produced tail gas is recycled by heat exchanger, is heated by fresh water (FW), or is used for the hot water of other operation, as mill water, reclaimed heat further.
2, the present invention adopts micropowder dryer and airflow screening, changes working method and method, in product-collecting, the continuous airtight operation of whole system, the yield of product finally depends on sack cleaner, and the yield of sack cleaner can reach 99.99%, and therefore product yield is high; Enter screening bed again after adopting air-flow tentatively to sieve, while alleviating screening bed load, product hierarchy is many simultaneously.Due to graphite products price and product hierarchy closely related, therefore the present invention improves the performance of enterprises in product yield and product hierarchy two simultaneously.
3, environment aspect, because the present invention adopts continued operation, operating efficiency is high, whole system is airtight simultaneously, and therefore material can not leak, compared with prior art, reduce hand labor intensity, meanwhile, decrease the contact of operating personnel and graphite powder, avoid the injury of graphite powder to personnel's respiratory system.Substantially improve execute-in-place environment, make whole site environment neat and tidy.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
In figure: 1-air cleaner, 2-air blast, 3-coal breaker, 4-coal dust surge tank, 5-belt conveyor, 6-chain furnace, 7-air heat exchanger, 8-fresh water (FW) heat exchanger, 9-micropowder dryer, 10, 13, 17-rotary discharger, 11-first sieves bed, 12-cyclone separator, 14-second sieves bed, 15-sack cleaner, 16-air-introduced machine, 18-32 order product storage tank, 19-50 order product storage tank, 20-80 order product storage tank, 21-100 order product storage tank, 22-150 order product storage tank, 23-bears 150 order product storage tanks, 24-first tonnage packing machine, 25-second tonnage packing machine, 26-Small bag packaging machine.
Detailed description of the invention
Below in conjunction with accompanying drawing, technological process of the present invention is described in any further:
Lump coal through coal breaker 3 pulverize after, by coal dust surge tank 4, through belt conveyor 5, enter chain furnace 6 as fuel, meanwhile, air through air cleaner 1 filter after by air blast 2 supercharging after be divided into two-way; One tunnel directly enters chain furnace 6 as combustion air.First the 750-820 DEG C of high-temperature flue gas produced in chain furnace 6 enter air heat exchanger 7 and add hot-air to 400 DEG C as drying medium, and the low-temperature flue gas after heat exchange enters the heat medium of fresh water (FW) heat exchanger 8 as fresh water (FW); Another road enters air heat exchanger 7 and carries out heat exchange.The high temperature air being heated to 400 DEG C through air heat exchanger 7 enters the micropowder dryer 9(patent No.: 02 2 62102.4, and Tianhua Chemical Machinery & Automation Design Inst is developed).Micropowder dryer 9 integrates the breaing up of material, dry, classification.Here micropowder dryer 9 adopts static state to break up, and does not produce fragmentation to graphite.Graphite powder after breaing up is fully contact in micropowder dryer 9, and heat drying makes the wet part evaporation in graphite powder, and moisture content is less than 0.5% (wt).Dried graphite powder is carried secretly by air and is carried out classification layer by layer: (1) bulky grain carries out sedimentation at the gravity settling chamber of micropowder dryer 9 upper end, the bulky grain graphite powder settled down is collected and is entered the first screening bed 11 by rotary valve 10 and sieve, first waste residue is screened out, is then 32 orders by graphite products screening, 32 order product storage tank 18,50 order the product storage tank 19 and 80 order product storage tanks 20 that enter respectively of 50 orders, 80 order, three order number grades; (2) fine grained enters the second screening bed 14 by rotary valve 13 sieve by collecting through cyclone separator 12, and screening is 80 orders, 100 orders, 150 order, three order number grades enter corresponding 80 order product storage tank 20,100 order product storage tank 21 and 150 order product storage tanks 22 respectively; (3) cyclone separator 12 enters sack cleaner 15 to the graphite dust do not eliminated with air and carries out further dedusting collection, and the graphite powder collected enters negative 150 order product storage tanks 23 through rotary valve 17.First tonnage packing machine 24, second tonnage packing machine 25 and Small bag packaging machine 26 is set in product storage tank lower end, packing machine by guide rail move around to screening product pack.Air after sack cleaner 15 fully dedusting is discharged by air-introduced machine 16.
Claims (2)
1. graphite composite powder drying and a screening collection method, the steps include:
A. graphite composite powder is dry
Lump coal is after coal breaker (3) is pulverized, by coal dust surge tank (4), through belt conveyor (5), enter chain furnace (6) as fuel, simultaneously air after air cleaner (1) filters by air blast (2) supercharging after be divided into two-way, one tunnel directly enters chain furnace (6) as combustion air, the 750-820 DEG C of high-temperature flue gas produced in chain furnace (6) first enters air heat exchanger (7) and adds hot-air to 400 DEG C as drying medium, and the low-temperature flue gas after heat exchange enters the heat medium of fresh water (FW) heat exchanger (8) as fresh water (FW); Another road enters air heat exchanger (7) and carries out heat exchange, and the high temperature air being heated to 400 DEG C through air heat exchanger (7) enters micropowder dryer (9), fully contacts at micropowder dryer (9) with graphite powder, and heat drying makes the wet part evaporation in graphite powder;
B. graphite composite powder layering is collected
Dried graphite powder is carried secretly by air and is carried out classification layer by layer: (1) bulky grain carries out sedimentation at the gravity settling chamber of micropowder dryer (9) upper end, the bulky grain graphite powder settled down is collected and is entered the first screening bed (11) by rotary valve (10) and sieve, first waste residue is screened out, be then 32 orders by graphite products screening, 50 orders and 80 orders, three order number grades enter 32 order product storage tanks (18), 50 order product storage tanks (19) and 80 order product storage tanks (20) respectively; (2) fine grained enters the second screening bed (14) by rotary valve (13) sieve by collecting through cyclone separator (12), and screening is 80 orders, 100 orders and 150 orders, three order number grades enter corresponding 80 order product storage tanks (20), 100 order product storage tanks (21) and 150 order product storage tanks (22) respectively; (3) cyclone separator (12) enters sack cleaner (15) to the graphite dust do not eliminated with air and carries out further dedusting collection, and the graphite powder collected enters negative 150 order product storage tanks (23) through rotary valve (17); First tonnage packing machine (24), the second tonnage packing machine (25) and Small bag packaging machine (26) are set in product storage tank lower end, packing machine by guide rail move around to screening product pack; Air after sack cleaner (15) fully dedusting is discharged by air-introduced machine (16).
2. a kind of the graphite composite powder as claimed in claim 1 dry and screening method of collecting, is characterized in that in drying system, and micropowder dryer (9) hot-air can be provided by chain furnace (6) or gas furnace or oil burner or electric heater.
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| CN201210323941.XA CN103673508B (en) | 2012-09-05 | 2012-09-05 | Method for drying, screening and collecting graphite powder |
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| CN201210323941.XA CN103673508B (en) | 2012-09-05 | 2012-09-05 | Method for drying, screening and collecting graphite powder |
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| CN103673508B true CN103673508B (en) | 2015-06-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105268648A (en) * | 2015-04-16 | 2016-01-27 | 天津美腾科技有限公司 | Intelligent lump coal and granular coal grain-level dry separation process |
| CN110316731B (en) * | 2019-07-10 | 2021-03-02 | 青岛洛唯新材料有限公司 | Post-treatment system for graphite purification |
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| JP2996963B1 (en) * | 1998-10-27 | 2000-01-11 | 川崎重工業株式会社 | Fluidized bed drying / classifying equipment |
| CN1481940A (en) * | 2003-07-29 | 2004-03-17 | 武汉理工大学 | Dry-type graded concentration method for precious metal tenuousness grainy tailings |
| CN101792686A (en) * | 2010-02-11 | 2010-08-04 | 天地科技股份有限公司唐山分公司 | Lignite drying and screening forming process and drying and screening device thereof |
| CN102061211A (en) * | 2011-01-04 | 2011-05-18 | 内蒙古工业大学 | Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis |
| CN102345967A (en) * | 2011-08-31 | 2012-02-08 | 南宁吉然糖业技术有限公司 | Multi-level impulse bagasse drying system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230541A1 (en) * | 2002-06-12 | 2003-12-18 | Derrick Mitchell J. | Vibratory screening machine with suction and pressure and method for screening a slurry |
| AR068838A1 (en) * | 2007-10-09 | 2009-12-09 | Cbp Carbon Ind Inc | COMPOSITION OF ELASTOMERO WITH RECYCLED FILLING MATERIALS |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2996963B1 (en) * | 1998-10-27 | 2000-01-11 | 川崎重工業株式会社 | Fluidized bed drying / classifying equipment |
| CN1481940A (en) * | 2003-07-29 | 2004-03-17 | 武汉理工大学 | Dry-type graded concentration method for precious metal tenuousness grainy tailings |
| CN101792686A (en) * | 2010-02-11 | 2010-08-04 | 天地科技股份有限公司唐山分公司 | Lignite drying and screening forming process and drying and screening device thereof |
| CN102061211A (en) * | 2011-01-04 | 2011-05-18 | 内蒙古工业大学 | Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis |
| CN102345967A (en) * | 2011-08-31 | 2012-02-08 | 南宁吉然糖业技术有限公司 | Multi-level impulse bagasse drying system |
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