CN101846441B - Lignite drying system - Google Patents

Lignite drying system Download PDF

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Publication number
CN101846441B
CN101846441B CN2009101837173A CN200910183717A CN101846441B CN 101846441 B CN101846441 B CN 101846441B CN 2009101837173 A CN2009101837173 A CN 2009101837173A CN 200910183717 A CN200910183717 A CN 200910183717A CN 101846441 B CN101846441 B CN 101846441B
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air
coal
valve
cylindrical shell
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CN2009101837173A
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CN101846441A (en
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柏静柱
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Yancheng Haike Machinery Manufacturing Co., Ltd.
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柏静柱
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Abstract

The invention discloses a lignite drying system. A three-cylinder dryer in the lignite drying system comprises an air inlet device, combined cylinders, a discharging device and a driving device. The air inlet device comprises an outer shell and an inner shell. The inner shell is penetrated in the outer shell. The outer shell is provided with an outer cylinder air blending valve and an outer cylinder thermoelectric couple. The outer cylinder air blending valve is connected with the corresponding electric executer. The inner shell is provided with a middle cylinder air blending valve and a middle thermoelectric couple thereon. The middle cylinder air blending valve is connected with the corresponding electric executer. The air outlet of a coal power furnace in the system is provided with an inner thermoelectric couple and an inner cylinder air blending valve. The air outlet of the discharging device is connected with the air inlet of the cyclone dust collector via ventilating duct. The air outlet of the cyclone dust collector is connected with the inlet of the bag-type dust collector. The discharge hole of the bag-type dust collector and the discharge hole of the cyclone dust collector are connected with the feeding hole of the screw conveyer, and the discharge hole of the screw conveyer is connected with the bunker of the coal grinding powder spraying device of the coal powder furnace.

Description

The brown coal drying system
Affiliated technical field
The present invention relates to the drying system of the high material of a kind of water content, especially a kind of brown coal drying system.
Background technology
Brown coal are one of main coal resources of China, account for 16% of world's brown coal reserves, and China is very low to the development and utilization level of brown coal at present.Along with the continuous increase of China, will be more and more important to the development and utilization of brown coal to energy demand.Brown coal are compared with bituminous coal, anthracite, and the advantage of brown coal is that price is lower, the reactivity height, but its calorific value is relatively low, and water content is higher.Therefore one of key of the development and use of brown coal is the exploitation of the drying and the upgrading technology of brown coal.Generally adopt the steam drying process that brown coal are carried out drying at present abroad, directly deliver near coal-mine power plant then and be used for combustion power generation.With different abroad, the near coal-mine power plant of China quantity is few, and most of power plant is away from the colliery.Therefore need could arrive the coal-burning power plant through long-distance transport after the exploitation of the coal resources of China, the radius of Coal Transport is bigger.This development and utilization to lignite resource is had higher requirement.Consider that from cost of transportation and fuel value aspect brown coal need just can be transported to power plant's burning after drying.Brown coal after the dry processing of the steam of U.S.'s exploitation are called as K-fuel, do not solve the problem of brown coal spontaneous combustion, even the possibility of spontaneous combustion is increased.The mechanical hot extrusion technology of brown coal research center, Australia research, its treatment effeciency is extremely low, and the brown coal water content after the processing is still higher.In general, to the dry technology of brown coal, not only cost of investment is too high, and its technology is also not mature enough at present.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of brown coal drying system, and this system is not only to the efficient height of brown coal drying, and cost of investment is low.
In order to solve the problems of the technologies described above, a kind of brown coal drying of the present invention system, this system contains coal-powder boiler, three-cylinder drier, elevator, cyclone dust collectors, sack cleaner and conveying worm, coal-powder boiler contains coal-grinding dusting device and combustion chamber, coal feed point and air outlet are contained in the combustion chamber, the coal outlet of coal-grinding dusting device and the coal feed point of combustion chamber link, three-cylinder drier contains feed pipe, air-intake device, the combined type cylindrical shell, drawing mechanism and drive unit, the combined type cylindrical shell is by three outer cylinder bodies of different-diameter from big to small, the concentric suit of middle cylinder body and inner barrel forms, the outer cylinder body of combined type cylindrical shell is provided with the wheel band, this is taken turns band and is placed on the support roller of drive unit, drawing mechanism is arranged on the right-hand member of compound cylindrical shell, air-intake device contains shell body, inner housing, inner housing is installed in the shell body, shell body is provided with urceolus and mixes air-valve and urceolus thermocouple, urceolus is mixed its corresponding YE of air-valve and is linked, tube was mixed air-valve and middle tube thermocouple during inner housing was provided with, middle tube is mixed its corresponding YE of air-valve and is linked, the left end of the shell body of air-intake device and the air outlet of coal-powder boiler link, the left end of the outer cylinder body of the right-hand member of the shell body of air-intake device and combined type cylindrical shell links by connecting hose and outer cylinder body can rotate with respect to shell body, be connected for labyrinth structure between the left end of the right-hand member of the inner housing of air-intake device and the middle cylinder body of combined type cylindrical shell, the inner barrel left part of combined type cylindrical shell is arranged in the inner housing of air-intake device, the air outlet place of coal-powder boiler is provided with the inner core thermocouple and inner core is mixed air-valve, inner core is mixed its corresponding YE of air-valve and is linked, the feed pipe lower end is positioned at the left end of the inner barrel of combined type cylindrical shell, its upper end is positioned at the outside of air-intake device, the feed pipe upper end links with the discharging opening of elevator, the drawing mechanism of three-cylinder drier contains air outlet and discharging opening, the air outlet of drawing mechanism links by the air inlet of ventilation shaft and cyclone dust collectors, the air outlet of cyclone dust collectors links by the import of ventilation shaft and sack cleaner, the charging aperture of the discharging opening of sack cleaner and the discharging opening of cyclone dust collectors and conveying worm links, and the feed bin of the coal-grinding dusting device of the discharging opening of conveying worm and coal-powder boiler links.
The drawing mechanism of described three-cylinder drier is provided with explosion-protection equipment.
Described combustion chamber is provided with thermocouple and exhaust valve, and its corresponding YE of exhaust valve links.
The bottom of the combustion chamber of described coal-powder boiler is provided with the collection apparatus for ash.
Described collection apparatus for ash is made of collection ash awl and unloading valve, and collection ash awl is arranged on the bottom of combustion chamber, and unloading valve is arranged on the bottom of collection ash awl.
The below of the discharging opening of the drawing mechanism of described three-cylinder drier is provided with belt conveyor.
Because the high-temperature hot-air that adopts coal-powder boiler to produce enters in the three-cylinder drier brown coal are carried out drying operation, the coal dust of collecting by cyclone dust collectors and sack cleaner is transported in the coal-grinding dusting device of coal-powder boiler through conveying worm simultaneously, by this device coal dust is ejected in the coal-powder boiler, burn in this stove high-temperature hot-air that produces of coal dust offers three-cylinder drier brown coal is dried, thereby realized brown coal drying and upgrading in the working continuously of one, therefore above-mentioned brown coal drying system is to the efficient height of brown coal drying.Because the cost of investment of this brown coal drying system is compared with the cost of investment of external disposal ability like products, only be its 1/20th, so cost of investment is low.
Description of drawings
Accompanying drawing is the structural representation of a kind of brown coal drying of the present invention system.
1. coal-grinding dusting devices in the accompanying drawing, 2. coal outlet, 3. coal feed point, 4. combustion chamber, 5. air outlet, 6. inner core thermocouple, 7. inner core is mixed air-valve, 8. unloading valve 9. collects the ash awl, 10. inner housing, 11. middle tube is mixed air-valve, tube thermocouple in 12., 13. thermocouples, 14. exhaust valve, 15. YEs, 16. elevators, 17. feed pipe, 18. shell bodies, 19. urceolus are mixed air-valve, 20. the urceolus thermocouple, 21. outer cylinder bodies, 22. middle cylinder bodies, 23. inner barrel, 24. take turns band, 25. support rollers, 26. drive unit, 27. 3 baking machines, 28. drawing mechanisms, 29. discharging opening, 30. cyclone dust collectors, 31. air inlets, 32. air outlet, 33. sack cleaners, 34. blower fans, 35. helix transporting device, 36. feed bins, 37. explosion-protection equipments.
The specific embodiment
In the accompanying drawing, a kind of brown coal drying system contains educates coal-powder boiler, three-cylinder drier 27, elevator 16, cyclone dust collectors 30, sack cleaner 33 and conveying worm 35.Coal-powder boiler contains coal-grinding dusting device 1 and combustion chamber 4.Coal feed point 3 and air outlet 5 are contained in combustion chamber 4, and the coal outlet 2 of coal-grinding dusting device 1 links with the coal feed point 3 of combustion chamber 4.Three-cylinder drier 27 contains feed pipe 17, air-intake device, combined type cylindrical shell, drawing mechanism 28 and drive unit 26.Outer cylinder body 21, middle cylinder body 22 and the inner barrel 23 concentric suits of different-diameter form the combined type cylindrical shell from big to small by three.The outer cylinder body 21 of combined type cylindrical shell be provided with wheel with 24, this takes turns with 24 and is placed on the support roller 25 of drive unit 26.Drawing mechanism 28 is arranged on the right-hand member of compound cylindrical shell.Air-intake device contains shell body 18, inner housing 10, and inner housing 10 is installed in the shell body 18.Shell body 18 is provided with urceolus and mixes air-valve 19 and urceolus thermocouple 20, urceolus and mix air-valve 19 its corresponding YEs and link, not only can monitor the temperature in the outer cylinder body 21 like this, and when temperature is higher than 150 ℃ in the outer cylinder body 21, control device control urceolus is mixed air-valve 19 corresponding YEs to be made urceolus mix air-valve 19 to open, outer cylinder body 21 interior temperature are remained on 150 ℃.Because control device is a prior art, so do not describe in detail.Tube was mixed air-valve 11 and middle tube thermocouple 12 during inner housing 10 was provided with, middle tube is mixed air-valve 11 its corresponding YEs and is linked, not only can monitor the temperature in the middle cylinder body 22 like this, and when temperature is higher than 200 ℃ in the middle cylinder body 22, in the control device control tube mix air-valve 11 corresponding YEs make in tube mix air-valve 11 and open, middle cylinder body 22 interior temperature are remained on 200 ℃.The left end of the shell body 18 of air-intake device and the air outlet 5 of coal-powder boiler link.The left end of the right-hand member of the shell body 18 of air-intake device and the outer cylinder body 21 of combined type cylindrical shell links by connecting hose and outer cylinder body 21 can rotate with respect to shell body 18.Be connected for labyrinth structure between the left end of the right-hand member of the inner housing 10 of air-intake device and the middle cylinder body 22 of combined type cylindrical shell.The left part of the inner barrel 23 of combined type cylindrical shell is arranged in the inner housing 10 of air-intake device.Air outlet 5 places of coal-powder boiler are provided with inner core electric heating galvanic couple 6 and inner core is mixed air-valve 7, inner core is mixed air-valve 7 its corresponding YEs and linked, not only can monitor the temperature that enters inner barrel 23 like this, and when the temperature that enters inner barrel 23 is higher than 250 ℃, control device control inner core is mixed air-valve 7 corresponding YEs to be made inner core mix air-valve 7 to open, the interior temperature that enters cylindrical shell 23 is remained on 250 ℃.The lower end of feed pipe 17 is positioned at the left end of the inner barrel 23 of combined type cylindrical shell, the outside that its upper end is positioned at air-intake device.The discharging opening of the upper end of feed pipe 17 and elevator 16 links.The drawing mechanism 28 of three-cylinder drier 27 contains air outlet and discharging opening, the air outlet of drawing mechanism 28 links by the air inlet 31 of ventilation shaft and cyclone dust collectors 30, and the air outlet 32 of cyclone dust collectors 30 links by the import of ventilation shaft and sack cleaner 33.The air outlet of sack cleaner 33 and blower fan 34 link.The discharging opening 29 of the discharging opening of cyclone dust collectors 33 and cyclone dust collectors 30 links with the charging aperture of conveying worm 35, and the feed bin 36 of the coal-grinding dusting device 1 of the discharging opening of conveying worm 35 and coal-powder boiler links.For strengthening safety in production, the drawing mechanism 28 of three-cylinder drier 27 is provided with explosion-protection equipment 37.Be the temperature in the control combustion chamber 4, combustion chamber 4 is provided with thermocouple 13 and exhaust valve 14, and exhaust valve 14 its corresponding YEs 15 link.When the temperature in the combustion chamber 4 was higher than 300 ℃, control device control exhaust valve 14 corresponding YEs 15 were opened exhaust valve 14 like this, and the temperature that this is indoor remains on 300 ℃.Be the convenient dust of collecting, the bottom of the combustion chamber 4 of coal-powder boiler is provided with the collection apparatus for ash, and this collection apparatus for ash is made of collection ash awl 9 and unloading valve 8, and collection ash awl 9 is arranged on the bottom of combustion chamber 4, and unloading valve 8 is arranged on the bottom of collection ash awl 9.For conveniently transporting material, the below of the discharging opening of the drawing mechanism 28 of three-cylinder drier 27 is provided with belt conveyor, and is not shown in the figures.During work, in combustion chamber 4, ignite the burning after, the coal outlet 2 of coal-grinding dusting device 1 sprays into the high-temperature hot-air that coal dust burns and produces in combustion chamber 4, the passage from outer cylinder body 21 and the space between the middle cylinder body 22 that the shell body 18 and the passage between the inner housing 10 of air-intake device enters compound cylindrical shell, between inner housing 10 and inner barrel 23 left parts enters the middle cylinder body 22 and the space between the inner barrel 23 of compound cylindrical shell, directly enter its inside from the left end of inner barrel 23.Elevator 16 rises to discharging opening with brown coal, brown coal enter the feed pipe 17 from this mouth, brown coal enter the charging aperture of inner barrel 23 left ends of compound cylindrical shell again from the lower end of feed pipe 17, compound cylindrical shell rotates under the drive of drive unit 26, the guide plate of brown coal through inner barrel 23 left port places enters in the inner barrel 23, and push spiral lifting blade in it rapidly to, rotation along with the combined type cylindrical shell, after spiral lifting blade lifts brown coal, brown coal and high-temperature hot-air carry out sufficient heat exchange in the process that falls, brown coal advance to the discharging opening direction of inner barrel 23 right-hand members gradually under the effect of spiral lifting blade, when brown coal arrive the discharging opening of inner barrel 23 right-hand members, under the gravity effect, fall in the middle cylinder body 22, guide plate by the charging aperture place that is arranged on middle cylinder body 22 guides brown coal to left movement, within it under the effect of spiral lifting blade, brown coal advance to the left end discharging opening direction of middle cylinder body 22 gradually, meanwhile brown coal and the high-temperature hot-air in middle cylinder body 22 carry out sufficient heat exchange, when arriving middle cylinder body 22 left ends, under the gravity effect, enter in the outer cylinder body 21 again, brown coal end motion to the right under the guide plate guiding at outer cylinder body 21 charging aperture places, brown coal advance to the discharging opening direction of outer cylinder body 21 right-hand members gradually under the effect of spiral lifting blade within it, meanwhile brown coal and the high-temperature hot-air in outer cylinder body 21 carry out sufficient heat exchange, and last brown coal enter in the drawing mechanism 28 and are discharged from outside the machine from its discharging opening.The high-temperature hot-air of finishing the brown coal drying process carries part brown coal fine particle and enters through the air outlet of drawing mechanism 28 and carry out dedusting in the cyclone dust collectors 30, and the part coal dust of removing enters the conveying worm 25 from its discharging opening 29.High-temperature hot-air through cyclone dust collectors 30 dedustings, enter sack cleaner 33 from the air outlet 32 of cyclone dust collectors 30 and carry out further dust removal process, coal dust after the processing enters the conveying worm 25 from its discharging opening, and the clean air after the processing is arranged to atmosphere by blower fan 43.Enter the coal dust in the conveying worm 25, by its conveying coal dust is entered in the feed bin 36 of coal-grinding dusting device 1, for combustion chamber 4 provides fuel.Because the high-temperature hot-air that the present invention adopts coal-powder boiler to produce enters in the three-cylinder drier 27 brown coal are carried out drying operation, the coal dust of collecting by cyclone dust collectors 30 and sack cleaner 33 is transported in the coal-grinding dusting device 1 of coal-powder boiler through conveying worm 35 simultaneously, by this device coal dust is ejected in the combustion chamber 4 of coal-powder boiler and burns, the high-temperature hot-air that produces offers 27 pairs of brown coal of three-cylinder drier and carries out drying, thereby realized brown coal drying and upgrading working continuously in one, therefore the brown coal drying system has realized the brown coal upgrading the efficient height of brown coal drying.Since the cost of investment of the product that the cost of investment of brown coal drying system is identical with external disposal ability only compare for its 1/20th, so cost of investment is low.

Claims (6)

1. brown coal drying system, it is characterized in that: this system contains coal-powder boiler, three-cylinder drier, elevator, cyclone dust collectors, sack cleaner and conveying worm, coal-powder boiler contains coal-grinding dusting device and combustion chamber, coal feed point and air outlet are contained in the combustion chamber, the coal outlet of coal-grinding dusting device and the coal feed point of combustion chamber link, three-cylinder drier contains feed pipe, air-intake device, the combined type cylindrical shell, drawing mechanism and drive unit, the combined type cylindrical shell is by three outer cylinder bodies of different-diameter from big to small, the concentric suit of middle cylinder body and inner barrel forms, the outer cylinder body of combined type cylindrical shell is provided with the wheel band, this is taken turns band and is placed on the support roller of drive unit, drawing mechanism is arranged on the right-hand member of compound cylindrical shell, air-intake device contains shell body, inner housing, inner housing is installed in the shell body, shell body is provided with urceolus and mixes air-valve and urceolus thermocouple, urceolus is mixed its corresponding YE of air-valve and is linked, tube was mixed air-valve and middle tube thermocouple during inner housing was provided with, middle tube is mixed its corresponding YE of air-valve and is linked, the left end of the shell body of air-intake device and the air outlet of coal-powder boiler link, the left end of the outer cylinder body of the right-hand member of the shell body of air-intake device and combined type cylindrical shell links by connecting hose and outer cylinder body can rotate with respect to shell body, be connected for labyrinth structure between the left end of the right-hand member of the inner housing of air-intake device and the middle cylinder body of combined type cylindrical shell, the inner barrel left part of combined type cylindrical shell is arranged in the inner housing of air-intake device, the air outlet place of coal-powder boiler is provided with the inner core thermocouple and inner core is mixed air-valve, inner core is mixed its corresponding YE of air-valve and is linked, the feed pipe lower end is positioned at the left end of the inner barrel of combined type cylindrical shell, its upper end is positioned at the outside of air-intake device, the feed pipe upper end links with the discharging opening of elevator, the drawing mechanism of three-cylinder drier contains air outlet and discharging opening, the air outlet of drawing mechanism links by the air inlet of ventilation shaft and cyclone dust collectors, the air outlet of cyclone dust collectors links by the import of ventilation shaft and sack cleaner, the charging aperture of the discharging opening of sack cleaner and the discharging opening of cyclone dust collectors and conveying worm links, and the feed bin of the coal-grinding dusting device of the discharging opening of conveying worm and coal-powder boiler links.
2. brown coal drying according to claim 1 system, it is characterized in that: the drawing mechanism of described three-cylinder drier is provided with explosion-protection equipment.
3. brown coal drying according to claim 1 system, it is characterized in that: described combustion chamber is provided with thermocouple and exhaust valve, and its corresponding YE of exhaust valve links.
4. brown coal drying according to claim 1 system, it is characterized in that: the bottom of the combustion chamber of described coal-powder boiler is provided with the collection apparatus for ash.
5. brown coal drying according to claim 4 system is characterized in that: described collection apparatus for ash is made of collection ash awl and unloading valve, and collection ash awl is arranged on the bottom of combustion chamber, and unloading valve is arranged on the bottom that the collection ash is bored.
6. according to claim 1,2,3,4 or 5 described brown coal drying systems, it is characterized in that: the below of the discharging opening of the drawing mechanism of described three-cylinder drier is provided with belt conveyor.
CN2009101837173A 2009-08-20 2009-08-20 Lignite drying system Expired - Fee Related CN101846441B (en)

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CN2009101837173A CN101846441B (en) 2009-08-20 2009-08-20 Lignite drying system

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103409151A (en) * 2013-08-20 2013-11-27 北京宝塔三聚能源科技有限公司 Lignite upgrading device
CN103629902A (en) * 2013-11-05 2014-03-12 张家港保税区多元机械设备制造有限公司 Three-layer rotary dryer
CN103712226B (en) * 2013-12-13 2016-12-07 山西蓝天环保设备有限公司 It is applied to the circulation pulverized coal preparation system of middle-size and small-size industrial coal powder boiler
CN109028907A (en) * 2018-09-06 2018-12-18 苏州绿乘轻质绿色材料有限公司 Three-pass rotary drum drying equipment and its application and inorganic lightweight aggregate ore in sand form drying means
CN115746932A (en) * 2023-01-09 2023-03-07 羚羊环保科技有限公司 Lignite drying, quality improving and powder making production process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2030303U (en) * 1988-04-11 1989-01-04 张保民 Three-drum drying machine
CN2255026Y (en) * 1995-03-01 1997-05-28 张保民 Three cylinder drying machine
US6241902B1 (en) * 1999-11-22 2001-06-05 Wawcon, Inc. Methods and apparatus for de-watering sludge
CN101303191A (en) * 2007-05-13 2008-11-12 薛茂廷 Compound high-efficiency energy conservation drying machine
CN201476489U (en) * 2009-08-20 2010-05-19 柏静柱 Lignite drying system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2030303U (en) * 1988-04-11 1989-01-04 张保民 Three-drum drying machine
CN2255026Y (en) * 1995-03-01 1997-05-28 张保民 Three cylinder drying machine
US6241902B1 (en) * 1999-11-22 2001-06-05 Wawcon, Inc. Methods and apparatus for de-watering sludge
CN101303191A (en) * 2007-05-13 2008-11-12 薛茂廷 Compound high-efficiency energy conservation drying machine
CN201476489U (en) * 2009-08-20 2010-05-19 柏静柱 Lignite drying system

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