CN101581533B - Device for pre-drying lignite through overheated steam and process thereof - Google Patents
Device for pre-drying lignite through overheated steam and process thereof Download PDFInfo
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- CN101581533B CN101581533B CN 200910015753 CN200910015753A CN101581533B CN 101581533 B CN101581533 B CN 101581533B CN 200910015753 CN200910015753 CN 200910015753 CN 200910015753 A CN200910015753 A CN 200910015753A CN 101581533 B CN101581533 B CN 101581533B
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Abstract
The invention discloses a device for pre-drying lignite through overheated steam and a process thereof. The device comprises an internal heating fluidized bed dryer with at least one inbuilt heat exchanger; the internal heating fluidized bed dryer is provided with a feeding device, a discharge valve II and at least one level of a dedusting device, wherein the inbuilt heat exchanger is connected with saturated steam; a fluidized bed of the internal heating fluidized bed dryer is connected with the overheated steam; the inbuilt heat exchanger is also connected with a condensing water system; exhaust gas of the internal heating fluidized bed dryer is dedusted by the dedusting device and one pass of the dedusted exhaust gas is returned to the fluidized bed through a pressurization device; andthe other pass of the exhaust gas is exhausted.
Description
Technical field
The present invention is a kind of drying device and technology, and is a kind of specifically with internal heating fluidized bed and superheated steam brown coal pre-drying device and technology thereof the grafting of superheated steam technology.
Background technology
Conventional brown coal drying technology is to adopt the direct heated drums drying machine of hot flue gas and adopt steam to make the indirect whizzer of thermal source.The former is subjected to the influence of EAT owing to brown coal fugitive constituent height, easy catching fire, and drying efficiency is low and equipment investment is huge.Adopt the whizzer of indirect owing to need to carry humid gas, dry power consumption is high: about 1350kg steam/ton water, and also single machine yield is little, and about 60 tons/hour of the pre-dehydrating amount of the brown coal of 300MW unit needs many parallel connections.Consider security reason, increase nitrogen gas generation system, to prevent brown coal burning in the dry run, equipment investment is big.
The commercial Application of present domestic brown coal drying does not also have actual expansion, and at the brown coal power plant of existing use pulverized-coal fired boiler, domestic present commercial scale brown coal pre-dehydration device is blank.
Abstract of invention
Purpose of the present invention is exactly in order to address the above problem, a kind of superheated steam brown coal pre-drying device and technology thereof are provided, it is with internal heating fluidized bed and superheat steam drying technology grafting, can be directly with the brown coal drying of moisture 30%-50% to moisture 12%, filled up the blank of domestic industry scale brown coal pre-drying device.
For achieving the above object, the present invention adopts following technical scheme:
A kind of superheated steam brown coal pre-drying device, it comprises the internal heating fluidized bed drying machine that has at least one built-in heat exchanger, internal heating fluidized bed drying machine is provided with feeding device, discharge valve II and one-level dust arrester at least; Wherein, built-in heat exchanger is connected with saturated vapor, and the fluid bed of internal heating fluidized bed drying machine is connected with superheated steam, and built-in heat exchanger also is connected with condensate system; The weary gas of internal heating fluidized bed drying machine is leaded up to pressue device and is returned fluid bed after the dust arrester dedusting; Another road emptying.
Described dust arrester is a two-stage, is made up of the cyclone dust collectors and the electric cleaner of series connection; Wherein weary gas is after the cyclone dust collectors dedusting, and the dry powder of collection is sent into the finished product district, and weary gas then one the tunnel returns internal heating fluidized bed drying machine, the emptying after the electric cleaner dedusting of another road after the pressue device pressurization.
Described feeding device comprises feed bin, and feed bin cooperates with conveying worm, and conveying worm is connected with discharge valve I, and discharge valve I is connected with internal heating fluidized bed drying machine.
Described pressue device is a blower fan.
A kind of drying process of superheated steam brown coal pre-drying device, it is fluidizing agent with the superheated vapour, walks steam with the direct contact zones of brown coal; Its detailed process is: the wet brown coal of moisture 30%-50% are sent into internal heating fluidized bed drying machine, and superheated steam is sent into the fluid bed of internal heating fluidized bed drying machine, and saturated vapor is sent into its built-in heat exchanger as drying source; By the control time of staying of brown coal in bed, be dried to the moisture of requirement after, brown coal are discharged and to be sent into the finished product district; Moisture that drying is separated out and partial material are carried by the weary gas of the superheated steam in the fluid bed, and after the cyclone dust collectors dedusting, the dry powder of collection send the finished product district, and the weary gas of a part of superheated steam is sent fluid bed back to by the blower fan pressurization, as the drying medium of fluid bed; Another part superheated steam lacks gas emptying after the electric cleaner dedusting; The whole return boilers of condensed water in the built-in heat exchanger of internal heating fluidized bed drying machine utilize again.
Superheated steam brown coal pre-drying device of the present invention is made up of feed arrangement, internal heating fluidized bed drying machine, cyclone dust collectors, electric cleaner, finished product material conveying device, circulating fan etc.With internal heating fluidized bed drying machine and the grafting of superheat steam drying technology, internal heating fluidized bed drying machine is that interior heat exchanger is set in fluid bed, provides dry materials required most of heat.Superheated steam as fluidizing agent in order to carry the steam that brown coal drying is deviate from.The whole return boilers of condensed water utilize again.
Beneficial effect of the present invention: energy-saving effect is remarkable, has improved the thermal efficiency with superheat steam drying, and whole overheated dry run is oxygen-free environment, and is safe and reliable, continued operation, but with the process matched therewith seamless link of original power plant.Aspect raising thermoelectricity industry energy-saving consumption reduction, because the predrying technology of superheated steam brown coal has been compared remarkable advantages with conventional hot blast with steam contact drying technology, technical-economic index greatly improves, and therefore great promotion prospect is at home and abroad arranged.In China is under the Strategic Context of main energy sources with coal, quick growth trend at brown coal generating ratio, the predrying technology of develop and spread superheated steam brown coal energetically, technology upgrading innovation and energy-saving and emission-reduction work to China's electric power energy industry, to play crucial impetus, be environmentally friendly, water resource economizing type clean coal technological project.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein, 1. feed bin 2. conveying worms 3. discharge valve I 4. internal heating fluidized bed drying machine 5. discharge valve II 6. cyclone dust collectors 7. discharge valve III 8. electric cleaners 9. blower fans.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, superheated steam brown coal pre-drying device comprises internal heating fluidized bed drying machine 4, is provided with at least one built-in heat exchanger in internal heating fluidized bed drying machine 4.The fluid bed of internal heating fluidized bed drying machine 4 is connected with superheated steam, and built-in heat exchanger then is connected with saturated vapor.The top of internal heating fluidized bed drying machine 4 is provided with discharge valve I3, and it is connected with conveying worm 2, and conveying worm 2 cooperates with feed bin 1.The bottom of internal heating fluidized bed drying machine 4 is provided with discharge valve II5, and gained finished product dry powder is sent into the finished product district thus, and the dry powder that while cyclone dust collectors 6 are collected is then sent into the finished product district through the discharge valve III7 of cyclone dust collectors 6 bottoms.Weary gas is after cyclone dust collectors 6 dedustings, and the weary gas one tunnel of gained is sent fluid bed back to, emptying after another Lu Zejing electric cleaner 8 dedustings after blower fan 9 pressurizations.
Drying process of the present invention is:
The wet brown coal of moisture 30%-50% are fallen in the bed by the charging aperture that conveying worm 2, discharge valve I3 are delivered to internal heating fluidized bed drying machine 4.Superheated steam enters fluid bed by internal heating fluidized bed bottom air compartment, through entering bed behind the equal wind of air-distribution device.The superheated steam that enters bed in this process is controlled effectively, thereby makes an interior material keep stable fluidization.The heat heat drying that brown coal are provided by built-in heat exchanger and superheated steam in fluid bed, by the control time of staying of brown coal in bed, after being dried to the moisture of requirement, discharging opening discharge valve II5 by fluid bed dryer discharges, and the dry powder of collecting with 6 times discharge valve III7 of cyclone dust collectors is delivered to subsequent processing.Drying separates out moisture and partial material is carried by the superheated steam in the bed, flow out internal heating fluidized bed drying machine 4, after cyclone dust collectors 6 dedustings, a part is sent back to the air compartment of internal heating fluidized bed drying machine 4 by blower fan 9 pressurizations, as drying medium, another part is emptying matter after 8 dedustings of one-level electric cleaner.The whole return boilers of condensed water in internal heating fluidized bed drying machine 4 built-in heat exchangers utilize again.
Claims (3)
1. a superheated steam brown coal pre-drying device is characterized in that, it comprises the internal heating fluidized bed drying machine that has at least one built-in heat exchanger, and internal heating fluidized bed drying machine is provided with feeding device, discharge valve II and dust arrester; Wherein, built-in heat exchanger is connected with saturated vapor, and the fluid bed of internal heating fluidized bed drying machine is connected with superheated steam, and built-in heat exchanger also is connected with condensate system; The weary gas of the superheated steam of internal heating fluidized bed drying machine is leaded up to pressue device and is returned fluid bed after the dust arrester dedusting; Another road emptying; The steam (vapor) outlet of internal heating fluidized bed drying machine with by successively the series connection cyclone dust collectors be connected with the two-stage dust arrester that electric cleaner is formed, electric cleaner is connected with the emptying pipeline, pressue device one end is connected with pipeline between cyclone dust collectors and the electric cleaner, the other end is connected with the fluid bed of fluid bed dryer, and the superheated steam that fluid bed dryer is generated sends back to the drying medium of fluid bed dryer as fluid bed; Described pressue device is a blower fan; The discharging opening of the charging aperture of internal heating fluidized bed drying machine, discharging opening and cyclone dust collectors all is connected with discharge valve.
2. superheated steam brown coal pre-drying device as claimed in claim 1, it is characterized in that, described feeding device comprises feed bin, feed bin cooperates with conveying worm, conveying worm is connected with discharge valve I, discharge valve I is connected with internal heating fluidized bed drying machine, and internal heating fluidized bed drying machine is connected with the finished product district by discharge valve II; The discharging opening of cyclone dust collectors is connected with the finished product district by discharge valve III.
3. the drying process of the described superheated steam brown coal of claim 1 pre-drying device is characterized in that, it is fluidizing agent with the superheated vapour, walks steam with the direct contact zones of brown coal; Its detailed process is: the wet brown coal of moisture 30%-50% are sent into internal heating fluidized bed drying machine by discharge valve I, and superheated steam is sent into the fluid bed of internal heating fluidized bed drying machine, and saturated vapor is sent into its built-in heat exchanger as drying source; By the control time of staying of brown coal in bed, be dried to the moisture of requirement after, brown coal are discharged by discharge valve II and are sent into the finished product district; Moisture that drying is separated out and partial material are carried by the weary gas of the superheated steam in the fluid bed, after the cyclone dust collectors dedusting, the dry powder of collecting send the finished product district by discharge valve III, and the weary gas of a part of superheated steam is sent fluid bed back to by the blower fan pressurization, as the fluidizing agent of fluid bed; Another part superheated steam lacks gas emptying after the electric cleaner dedusting; The whole return boilers of condensed water in the built-in heat exchanger of internal heating fluidized bed drying machine utilize again.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910015753 CN101581533B (en) | 2009-06-04 | 2009-06-04 | Device for pre-drying lignite through overheated steam and process thereof |
| AU2009347547A AU2009347547B2 (en) | 2009-06-04 | 2009-12-24 | Multi-effect brown coal predrying system using superheated steam and process thereof |
| PCT/CN2009/001541 WO2010139103A1 (en) | 2009-06-04 | 2009-12-24 | Multi-effect brown coal predrying system using superheated steam and process thereof |
| TR2011/12915T TR201112915T1 (en) | 2009-06-04 | 2009-12-24 | Very effective brown coal pre-drying system using superheated steam and related process. |
| RU2011129266/06A RU2527904C2 (en) | 2009-06-04 | 2009-12-24 | Multistage system and method of preliminary drying brown coal using superheated steam |
| US13/179,580 US20110265342A1 (en) | 2009-06-04 | 2011-07-11 | Superheated vapor pre-drying systems for lignite and methods for drying lignite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910015753 CN101581533B (en) | 2009-06-04 | 2009-06-04 | Device for pre-drying lignite through overheated steam and process thereof |
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| Publication Number | Publication Date |
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| CN101581533A CN101581533A (en) | 2009-11-18 |
| CN101581533B true CN101581533B (en) | 2010-10-06 |
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| CN 200910015753 Active CN101581533B (en) | 2009-06-04 | 2009-06-04 | Device for pre-drying lignite through overheated steam and process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3575382A4 (en) * | 2017-01-24 | 2020-01-15 | Joo Sun Lee | System for drying lignite and method for drying lignite |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2527904C2 (en) * | 2009-06-04 | 2014-09-10 | Шаньдун Тианли Драинг Эквипмент Ко, Лтд. | Multistage system and method of preliminary drying brown coal using superheated steam |
| CN102120941A (en) * | 2010-01-11 | 2011-07-13 | 天华化工机械及自动化研究设计院 | Lignite drying, sloshing dust-removing and washing process |
| CN101881191B (en) * | 2010-05-27 | 2012-10-17 | 中国电力工程顾问集团公司 | Thermal power generation system based on high-moisture lignite pre-drying upgrading and recovering technology |
| CN101852540B (en) * | 2010-07-12 | 2012-07-04 | 山东天力干燥股份有限公司 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
| CN101915497B (en) * | 2010-08-13 | 2012-07-04 | 李相荣 | Lignite-drying and quality-improving process for preparing superheated steam from waste heat steam |
| CN102051246A (en) * | 2010-12-24 | 2011-05-11 | 徐斌 | Method for improving quality of brown coal |
| DE102012010078A1 (en) * | 2012-05-23 | 2013-11-28 | Rwe Power Ag | Process for the treatment of gruel wet lignite |
| CN104781624A (en) * | 2012-10-05 | 2015-07-15 | 阿兰·J·奇泽姆 | Method and apparatus for drying particulate matter |
| CN103822440A (en) * | 2012-11-18 | 2014-05-28 | 航天长征化学工程股份有限公司 | steam fluidized bed drying device and drying method |
| CN102967134B (en) * | 2012-11-30 | 2014-11-05 | 山东科院天力节能工程有限公司 | Drying system and process for recovering heat from waste heat steam |
| CN102967121B (en) * | 2012-11-30 | 2014-12-10 | 山东科院天力节能工程有限公司 | Lignite drying system and technology with superheated steam capable of recycling waste steam heat |
| CN102965170B (en) * | 2012-11-30 | 2016-08-03 | 山东天力干燥股份有限公司 | Energy-conserving and environment-protective brown coal briquette preparation technology and system |
| CN102997634B (en) * | 2012-12-18 | 2015-04-15 | 清华大学 | Moving bed brown coal drying method and device |
| CN103087796B (en) * | 2013-02-07 | 2014-04-16 | 中国矿业大学 | Process and system for vibration hot-pressing dehydration and quality improvement of brown coal |
| CN103123205B (en) * | 2013-03-07 | 2015-04-15 | 浙江大学 | Fluidization moving series arrangement steam drying system and technology |
| CN103512313B (en) * | 2013-07-18 | 2015-07-29 | 浙江大学 | A kind of combined type moist material fluid bed superheat steam drying system |
| WO2015100708A1 (en) * | 2014-01-06 | 2015-07-09 | 山东科院天力节能工程有限公司 | Drying equipment and drying method |
| CN103807868B (en) * | 2014-03-12 | 2016-04-20 | 华北电力大学 | Be applicable to the internal heating fluidized bed drying system of brown coal air cooling turbo-generator |
| CN105779071A (en) * | 2016-03-22 | 2016-07-20 | 王定坤 | Dewatering upgrading system and method of high-moisture lignite |
| CN105861009A (en) * | 2016-06-02 | 2016-08-17 | 华电重工股份有限公司 | Powder coal two-stage dry distillation device and dry distillation method |
| CN106052308B (en) * | 2016-06-15 | 2018-11-13 | 成都昊特新能源技术股份有限公司 | A kind of drying system and drying means using steam turbine steam exhaust |
| CN113862016B (en) * | 2021-09-29 | 2023-12-05 | 大连科力一诺环保科技有限公司 | Coking coal gradient preheating process and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3575382A4 (en) * | 2017-01-24 | 2020-01-15 | Joo Sun Lee | System for drying lignite and method for drying lignite |
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Owner name: SHANDONG TIANLI DRYING CO., LTD. Free format text: FORMER NAME: TIANLI DRYING EQUIPMENT CO., LTD., SHANDONG |
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Address after: 250101, Shandong Province, Ji'nan hi tech Zone, No. 554 Feng Feng Road, environmental science and Technology Park, building 8, Feng Feng building, room 230 Patentee after: Shandong Tianli Drying Co., Ltd. Address before: 250014 Shandong Province, Lixia District, Ji'nan City Hospital Road, No. 19 Patentee before: Tianli Drying Equipment Co., Ltd., Shandong |