CN103673508A - Method for drying, screening and collecting graphite powder - Google Patents
Method for drying, screening and collecting graphite powder Download PDFInfo
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- CN103673508A CN103673508A CN201210323941.XA CN201210323941A CN103673508A CN 103673508 A CN103673508 A CN 103673508A CN 201210323941 A CN201210323941 A CN 201210323941A CN 103673508 A CN103673508 A CN 103673508A
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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 present invention relates to the technical field of the screening collection of the dry energy-saving and cost-reducing and product of graphite composite powder, exactly to 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 paid attention to always, and the mode of production is rough so far, consumes energy huge, and site environment is severe.Along with expansion and the discovery of socio-economic development and graphite products application function, graphite products price skyrockets, and energy-conserving and environment-protective simultaneously require increasingly stringent, therefore needs a kind of new mode of production badly and is improved.Meanwhile, the price of graphite products is relevant with order number, is less than 80 orders and to be greater than 150 object product prices higher, and that middle order is counted product price is low, so the screening of product also seems important.
The general swing roller drying mode that adopts in existing graphite composite powder dry run, then by manually product being collected, puts into screening bed and sieves.Its course of work is:
Moisture content after filtering is about to 30% graphite composite powder slurry continuous uniform and adds in swing roller drying machine, under 400 ℃ of coal-fired indirect of cylinder periphery, moisture evaporates rapidly.The moisture content of material is less than 0.5% after drying, is loose granular material, is drawn off, then by manually collecting by swing roller drying machine discharge end.
The graphite composite powder of collecting by manually adding screening bed, carries out classification by mechanical grading to product again, and product is divided into different several order numbers, then by packing machine by manually packing.
The problem that above-mentioned graphite production procedure exists is:
1. energy consumption aspect: original graphite composite powder production technology adopts swing roller drying mode, is contact drying, and heat transfer coefficient is little, the mode of production is rough simultaneously, so energy consumption is relatively large.
2. product-collecting aspect: can find out from above-mentioned graphite production procedure, automaticity is lower, and employing artificially collects, so product yield is low; By manually the graphite powder of collection all being dropped into screening bed, sieve, therefore screening load is large simultaneously, and product quality is not high.
3. site environment aspect: adopt the graphite semi-finished product after roller drying to screen again processing through artificial or miscellaneous equipment, employing be intermittently operated, therefore have unavoidably material to leak, simultaneously because graphite powder light weight easily sticks, so site environment is severe.
4. labour intensity aspect: prior art is intermittently operated, and the operation cycle is long, and hand labor intensity is large, inefficiency.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide a kind of method that graphite composite powder is dry and screening is collected, adopt the dry graphite composite powder of micropowder dryer and adopt airflow screening to collect product.
The object of the present invention is achieved like this:
Graphite composite powder is dry and sieve a 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, air is by being divided into two-way after air blast supercharging after air cleaner filters simultaneously, and a road directly enters chain furnace as combustion air, and first the 750-820 ℃ of high-temperature flue gas producing in chain furnace enter air heat exchanger, add hot-air to 400 ℃ as drying medium, the low-temperature flue gas after heat exchange enters fresh water (FW) heat exchanger as the heat medium of fresh water (FW); Another road enters air heat exchanger and carries out heat exchange; The high temperature air that is heated to 400 ℃ through air heat exchanger enters micropowder dryer, fully contacts at micropowder dryer with graphite powder, and heat drying makes wet part of evaporation in graphite powder;
B. graphite composite powder screening is collected
Dried graphite powder is carried secretly and is carried out classification layer by layer by air: (1) bulky grain carries out sedimentation at the gravity settling chamber of micropowder dryer upper end, the bulky grain graphite powder settling down is collected and by rotary valve, is entered the first screening bed and sieve, first waste residue being screened out, is then that 32 orders, 50 orders, three orders of 80 order are counted grade and entered respectively 32 order product storage tanks, 50 order product storage tanks and 80 order product storage tanks by graphite products screening; (2) fine grained enters the second screening bed by rotary valve and sieves by collecting through cyclone separator, and screening is that 80 orders, 100 orders, three orders of 150 order are counted grade and entered respectively corresponding 80 order product storage tanks, 100 order product storage tanks and 150 order product storage tanks; (3) cyclone separator enters sack cleaner to the graphite dust not eliminating with air and carries out further dedusting collection, and the graphite powder of collecting enters negative 150 order product storage tanks through rotary valve; The first tonnage packing machine, the second tonnage packing machine and Small bag packaging machine are set in product storage tank lower end, and packing machine is moved around the product of screening is packed by guide rail.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, compares energy-conservation 60% left and right with original mode of production.Meanwhile, the heat that chain furnace is produced to tail gas is recycled by heat exchanger, fresh water (FW) is heated, or be used for the hot water of other operation, as mill water, has further reclaimed heat.
2, the present invention adopts micropowder dryer and airflow screening, has changed working method and method, aspect 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%, so product yield is high; After adopting the preliminary screening of air-flow, enter screening bed, when alleviating screening bed load, product hierarchy is many simultaneously again.Due to graphite products price and product hierarchy closely related, so the present invention is promoting the performance of enterprises aspect product yield and product hierarchy two simultaneously.
3, environment aspect, because the present invention adopts continued operation, operating efficiency is high, simultaneously whole system is airtight, so material can not leak, compared with prior art, reduced hand labor intensity, meanwhile, reduce contacting of operating personnel and graphite powder, avoided the injury of graphite powder to personnel's respiratory system.Greatly improved execute-in-place environment, made 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-the first screening bed, 12-cyclone separator, 14-the second screening 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-the first tonnage packing machine, 25-the second tonnage packing machine, 26-Small bag packaging machine.
The specific embodiment
Below in conjunction with accompanying drawing, technological process of the present invention is described in any further:
Lump coal, after coal breaker 3 is pulverized, by coal dust surge tank 4, through belt conveyor 5, enters chain furnace 6 as fuel, meanwhile, air after air cleaner 1 filters by being divided into two-way after air blast 2 superchargings; One tunnel directly enters chain furnace 6 as combustion air.First 750-820 ℃ of high-temperature flue gas of chain furnace 6 interior generations enter air heat exchanger 6 and add hot-air to 400 ℃ as drying medium, and the low-temperature flue gas after heat exchange enters fresh water (FW) heat exchanger 8 as the heat medium of fresh water (FW); Another road enters air heat exchanger 7 and carries out heat exchange.The high temperature air that is heated to 400 ℃ through air heat exchanger 7 enters the micropowder dryer 9(patent No.: 02 2 62102.4, and Tianhua Chemical Machinery & Automation Design Inst development).Micropowder dryer 9 integrates the breaing up of material, is dried, classification.Here micropowder dryer 9 adopts static state to break up, and graphite is not produced to fragmentation.Graphite powder after breaing up is in the interior abundant contact of micropowder dryer 9, and heat drying makes wet part of evaporation in graphite powder, and moisture content is less than 0.5% (wt).Dried graphite powder is carried secretly and is carried out classification layer by layer by air: (1) bulky grain carries out sedimentation at the gravity settling chamber of micropowder dryer 9 upper ends, the bulky grain graphite powder settling down is collected and by rotary valve 10, is entered the first screening bed 11 and sieve, first waste residue being screened out, is then that 32 orders, 50 orders, three orders of 80 order are counted 32 order product storage tank 18,50 order product storage tanks 19 and the 80 order product storage tanks 20 that grade enters respectively by graphite products screening; (2) fine grained enters the second screening bed 14 by rotary valve 13 and sieves by collecting through cyclone separator 12, and screening is that 80 orders, 100 orders, three orders of 150 order are counted grade and entered respectively corresponding 80 order product storage tank 20,100 order product storage tanks 21 and 150 order product storage tanks 22; (3) 12 pairs of graphite dusts that do not eliminate of cyclone separator enter sack cleaner 15 with air and carry out further dedusting collection, and the graphite powder of collecting enters negative 150 order product storage tanks 23 through rotary valve 17.The 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, and packing machine is moved around the product of screening is packed by guide rail.Air after the abundant dedusting of sack cleaner 15 is discharged by air-introduced machine 16.
Claims (2)
1. graphite composite powder is dried 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) filtration by being divided into two-way after air blast (2) supercharging, one tunnel directly enters chain furnace (6) as combustion air, the 750-820 ℃ of high-temperature flue gas producing in chain furnace (6) first enters air heat exchanger (6) and adds hot-air to 400 ℃ as drying medium, and the low-temperature flue gas after heat exchange enters fresh water (FW) heat exchanger (8) as the heat medium of fresh water (FW); Another road enters air heat exchanger (7) and carries out heat exchange, and the high temperature air that is heated to 400 ℃ through air heat exchanger (7) enters micropowder dryer (9), fully contacts at micropowder dryer (9) with graphite powder, and heat drying makes wet part of evaporation in graphite powder;
B. graphite composite powder layering is collected
Dried graphite powder is carried secretly and is carried out classification layer by layer by air: (1) bulky grain carries out sedimentation at the gravity settling chamber of micropowder dryer (9) upper end, the bulky grain graphite powder settling down is collected and by rotary valve (10), is entered the first screening bed (11) and sieve, first waste residue being screened out, is then that 32 orders, 50 orders and three orders of 80 orders are counted grade and entered respectively 32 order product storage tanks (18), 50 order product storage tanks (19) and 80 order product storage tanks (20) by graphite products screening; (2) fine grained enters the second screening bed (14) by rotary valve (13) and sieves by collecting through cyclone separator (12), and screening is that 80 orders, 100 orders and three orders of 150 orders are counted grade and entered respectively corresponding 80 order product storage tanks (20), 100 order product storage tanks (21) and 150 order product storage tanks (22); (3) cyclone separator (12) enters sack cleaner (15) to the graphite dust not eliminating with air and carries out further dedusting collection, and the graphite powder of collecting enters negative 150 order product storage tanks (23) through rotary valve (17); The 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, and packing machine is moved around the product of screening is packed by guide rail; Air after the abundant dedusting of sack cleaner (15) is discharged by air-introduced machine (16).
2. the method that a kind of graphite composite powder as claimed in claim 1 is dry and screening is collected, is characterized in that in drying system, and micropowder dryer (9) hot-air can be provided by chain furnace (2) 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110316731A (en) * | 2019-07-10 | 2019-10-11 | 青岛洛唯新材料有限公司 | A kind of after-treatment system of 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 |
| US20030230541A1 (en) * | 2002-06-12 | 2003-12-18 | Derrick Mitchell J. | Vibratory screening machine with suction and pressure and method for screening a slurry |
| 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 |
| US20100210782A1 (en) * | 2007-10-09 | 2010-08-19 | Cbp Carbon Industries, Inc. | Enhanced fine agglomerate mixture |
| 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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2012
- 2012-09-05 CN CN201210323941.XA patent/CN103673508B/en active Active
Patent Citations (7)
| 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 |
| US20030230541A1 (en) * | 2002-06-12 | 2003-12-18 | Derrick Mitchell J. | Vibratory screening machine with suction and pressure and method for screening a slurry |
| 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 |
| US20100210782A1 (en) * | 2007-10-09 | 2010-08-19 | Cbp Carbon Industries, Inc. | Enhanced fine agglomerate mixture |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110316731A (en) * | 2019-07-10 | 2019-10-11 | 青岛洛唯新材料有限公司 | A kind of after-treatment system of graphite purification |
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| CN103673508B (en) | 2015-06-17 |
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