CN101936648A - Humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of coke furnace - Google Patents

Humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of coke furnace Download PDF

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Publication number
CN101936648A
CN101936648A CN2010102916141A CN201010291614A CN101936648A CN 101936648 A CN101936648 A CN 101936648A CN 2010102916141 A CN2010102916141 A CN 2010102916141A CN 201010291614 A CN201010291614 A CN 201010291614A CN 101936648 A CN101936648 A CN 101936648A
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China
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coal
hot flue
coking coal
baffle plate
coke oven
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CN2010102916141A
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Chinese (zh)
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CN101936648B (en
Inventor
王充
尹华
王满
霍延中
高飞
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中冶焦耐(大连)工程技术有限公司
中冶焦耐工程技术有限公司
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Abstract

The invention relates to the technical field of humidity control and drying of coal, in particular to a humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of a coke furnace, which comprises a drier shell, a hot flue gas inlet and a flue gas outlet of a coke furnace, an inlet for coking coal not subjected to humidity control and an outlet for dried coal, wherein a material dispersing device is arranged in the drier shell, the inner wall of the drier shell is provided with a plurality of first baffles inclining downwards and a second baffle, and a sandwich structure is formed between the second baffle and the drier shell; and a plurality of third baffles are arranged at the upper part of the sandwich structure formed between the second baffle and the drier shell, and a gap is left between every two third baffles. The invention has the advantages of reasonable structural design and high heat exchange efficiency between coke furnace flue gas and humid coal, and can meet the requirements for energy saving, emission reduction and low-carbon life encouraged in China.

Description

Utilize the coke oven hot flue gases to the evenly dry humidity control device of different-grain diameter coking coal

Technical field

The present invention relates to coal damping technical field of drying, particularly a kind of coke oven hot flue gases that utilizes is realized evenly dry humidity control device to the coking coal of different-grain diameter.

Background technology

At present the coke-oven plant when coking used coking coal all without crossing the damping drying, coal charge humidity is all about 10%, humidity is bigger, coke oven needs to utilize coal gas to heat this part excessive moisture in process of coking, so both wasted the energy, because be converted into volumetric expansion in the steam process, cause the steam of generation to enter in the coke oven flue gas together again by aqueous water.And a large amount of 200 degrees centigrade of left and right sides flue gases that meanwhile produce in the process of coking directly are discharged in the atmosphere, and the coke oven flue gas of discharging has not only polluted environment but also wasted the energy, do not meet very much the requirement of national energy-saving and emission-reduction, low-carbon (LC) life.

According to Ministry of Industry and Information's file ([2010] No. 24 literary compositions of Ministry of Industry and Information's joint), talk about in the file, 2010-2014 carries out the coking coal conditioning technique in the large and medium-sized iron and steel enterprise of condition maturity, and expection adopts coal damping coke output will reach 83,000,000 tons.Present national coke output is about 400,000,000, and coal damping coke accounts for more than 20%.Talk about from now on the state planted agent in the file and widely popularize and utilize the coal conditioning technique of flue gas waste heat as dry media, therefore, adopt coke oven flue gas to carry out the damping drying of coking coal, feasible damping drying device reasonable in design is to be badly in need of the technical problem that solves at present.Though at present existing about adopting fluid bed to carry out the report of coal damping drying with the coke oven hot flue gases, be not widely used because of the damping heat exchange efficiency is high.

Summary of the invention

The purpose of this invention is to provide a kind of reasonable in design, coke oven flue gas and wet coal heat exchange efficiency high utilize the coke oven hot flue gases to the evenly dry humidity control device of different-grain diameter coking coal, reach the energy-saving and emission-reduction that country advocates, the requirement of low-carbon (LC) life.

For achieving the above object, the present invention is achieved through the following technical solutions:

Utilize the coke oven hot flue gases to the evenly dry humidity control device of different-grain diameter coking coal, comprise dryer shell, coke oven hot flue gases inlet, flue gas outlet, not damping coking coal inlet, dry back coal export, it is characterized in that, in dryer shell, be provided with the material dispersal device, on the dryer shell inwall, be provided with the baffle plate one of a plurality of downward-sloping interlaced arrangement.

Described material dispersal device constitutes by coal charge being stirred throwing diffusing tooth bar and rotating shaft.

Also being provided with baffle plate two on the described dryer shell inwall, is sandwich between baffle plate two and the dryer shell.

Described baffle plate two is provided with baffle plate three with the sandwich top that dryer shell constitutes, and baffle plate three is a plurality of, is provided with the space between each baffle plate three.

The lower case cross section of described dryer shell is less than the upper body cross section, and the middle and lower part housing is made up of the identical drying joint that has baffle plate one of a plurality of structures.

Described dryer shell outer wall is provided with vibrator.

The blanking end of described baffle plate one can be the shape of square termination, semicircle termination, oval termination, profile of tooth termination, fiery a plurality of round end petals termination.

Described baffle plate one is a loose structure.

Described dryer shell bottom is provided with level-sensing device, and level-sensing device is chain with the airtight form material casting device at coal export place, dry back.

Described not damping coking coal porch is provided with airtight form material casting valve.

Compared with prior art, the invention has the beneficial effects as follows:

The present invention has maximally utilised the waste heat of unsaturated coke oven flue gas, at the self property of pulverizing the back coal charge, coal charge to each grade has carried out damping drying to greatest extent, reduced energy consumption, reduced the humidity of coking coal, thereby the raising coke quality has improved economic benefit greatly, more meets the requirement of country to energy-saving and emission-reduction.

Description of drawings

Fig. 1 utilizes the structure cutaway view of coke oven hot flue gases to the humidity control device of the even drying of different-grain diameter coking coal;

Fig. 2 is that the A of apparatus of the present invention baffle plate one in Fig. 1 is to part drawing;

Fig. 3 is the elevation of apparatus of the present invention coke oven hot flue gases entrance side.

Among the figure: the airtight form material casting of 1-valve 2-material dispersal device 3-baffle plate one 4-baffle plate two 5-baffle plates three 6-level-sensing device 7-access door 8-dryer shell 9-are the dry joint of coal export 12-coke oven hot flue gases inlet 13-flue gas outlet 14-15-sandwich 16-rotating shaft 17-tooth bar after the airtight form material casting of the damping coking coal inlet 10-device 11-drying not

The specific embodiment

See Fig. 1, Fig. 3, utilize the coke oven hot flue gases to the evenly dry humidity control device of different-grain diameter coking coal, comprise dryer shell 8, coke oven hot flue gases inlet 12, flue gas outlet 13, not damping coking coal inlet 9, dry back coal export 11, in dryer shell 8, be provided with material dispersal device 2, the material dispersal device is made of tooth bar 17 and rotating shaft 16, rotating shaft 16 two ends are arranged on the dryer shell 8, thin wet granular coal can be stirred to throw and loose, simultaneously can prolong the holdup time of coal charge in air-flow, make wet coal charge drying more abundant.Be provided with a plurality of downward-sloping staggered baffle plates of arranging in order 1 on dryer shell 8 inwalls, concrete structure is seen accompanying drawing, owing to the flow velocity that can change fine grained and flue gas that stops of baffle plate 1, prolongs the heat exchanger time of coal charge and hot flue gases air-flow.

Also being provided with baffle plate 24 on dryer shell 8 inwalls, is sandwich 15 between baffle plate 24 and the dryer shell 8; Sandwich 15 can specifically be seen Fig. 1 along running through the form setting between the two relative inwalls in the dryer shell.Baffle plate 24 is provided with baffle plate 35 with the sandwich top that dryer shell 8 constitutes, baffle plate 35 is a plurality of, be provided with the space between each baffle plate 35, the middle fine grained coal charge that enters dryer shell top can be entered sandwich 15 by the space between the baffle plate 35, fallen into the hopper of dryer shell 8 bottoms by sandwich 15.

The lower case cross section of dryer shell 8 is less than the upper body cross section, and the middle and lower part housing is made up of the identical drying joint 14 that has baffle plate 1 of a plurality of structures.The big down little structure of this kind can be controlled the cross section flow velocity under the certain situation of flue pneumatic transmission exhaust gas volumn, concrete size can be determined according to the grain size grading that will separate coal charge, these dryer shell 8 middle and lower parts are made up of the identical drying joint that has baffle plate 3 of a plurality of structures simultaneously, drying is counted n successively and can be required to set present embodiment n=3 according to drying.Dryer shell 8 outer walls are installed vibrator simultaneously, and vibrator is provided with rational vibration frequency, can open vibrator and make its whereabouts when the coal grain accumulating amount on the baffle plate 1 is big.

The blanking end of described baffle plate 1 can be the shape (Fig. 2) of square termination, semicircle termination, oval termination, profile of tooth termination, fiery a plurality of round end petals termination, this shape can change the blanking contact area, to reach the more uniform purpose of blanking, the aperture that can open a plurality of quantity simultaneously on the baffle plate is beneficial to flue gas to be passed through, and is beneficial to the drying of coal charge.

Be provided with level-sensing device 6 in dryer shell 8 bottoms, level-sensing device 6 is chain with the airtight form material casting device 10 at coal export 11 places, dry back.When material level is higher than baffle plate 24 bottom 500mm the time, level-sensing device 6 chain promoters, airtight form material casting device 10 is opened, but blanking; When material level is then closed airtight form material casting device 10 during bottom less than 100mm apart from baffle plate 24,, prevent that air-flow from circulating fine grain blanking in the interference from the passage between baffle plate 24 and dryer shell 8 inwalls by this chain effect that reaches the envelope material.

The course of work of this device is: damping pulverize the back coking coal by drier not damping coking coal inlet 9 enter airtight form material casting valve 1, rotation along with airtight form material casting valve 1 blade, coking coal is thrown in the drier along the direction of tremie pipe after pulverizing, and meanwhile the coke oven hot flue gases enters drier inside by hot flue gases inlet 12.The coal charge major part that enters drier drops on the material dispersal device 2, for the coal charge of larger particles (diameter d>5mm), because the cross section flue gas flow rate of lower housing portion is less than this oarse-grained floating velocity, therefore bulky grain can collide, rebound, stops with material dispersal device 2, falls into hopper at last and is discharged by airtight form material casting device 10; For in; (diameter 5mm>d>0.5mm) can further be stirred throwing under the effect of material dispersal device 2 looses fine grained; and under the larger cross-section flue gas flow rate effect of dryer shell 8 middle and lower parts (greater than its floating velocity) with in the feed coal; carefully; microparticle is carried to dryer shell 8 tops; wherein middle fine grained can diminish (owing to the dryer shell cross section is up big and down small) owing to cross section, top flow velocity so that fall less than its floating velocity; the barrier effect of baffle plate 1 also can make it change flow direction simultaneously; make it finally fall hopper by sandwich 15 under this double action, microparticle then leaves drier with air-flow and enters next stage sack cleaner purification separation by flue gas outlet 13.Wherein material dispersal device 2 has not only played and the effect of loosing is thrown in the stirring of thin wet granular has also prolonged coal charge holdup time in drier simultaneously in this course, has prolonged hot wet swap time, reaches better drying effect.And level-sensing device 6 is chain with the airtight form material casting device 10 at coal export place, dry back, plays the effect that envelope material and isolated air communication are crossed, and prevents air-flow fine grain blanking from baffle plate 24 and the circulation of dryer shell 8 intraformational bed structures 15 passages are disturbed.

Through apparatus of the present invention, not only realized the wet exchange of heat of coke oven hot flue gases and wet coking coal, and the different grain size grade of middle fine grained, microparticle, coarse granule coal charge can have been separated.This is that common employing fluid bed carries out the inaccessible effect of coal damping with the coke oven hot flue gases.

Narrate the grade of pulverizing the back coking coal at present both at home and abroad below and form and humidity, further illustrate operation principle of the present invention and beneficial effect.

The grade of coal was composed as follows after the coke-oven plant pulverized both at home and abroad at present: coal charge particle diameter d>5mm's accounts for 7~11% in the feed coal; Coal charge particle diameter 5mm>=d>1mm accounts for 25~30%; Coal charge particle diameter 1mm>=d>0.5mm accounts for 14~17%; Coal charge particle diameter d<=0.5mm accounts for 40~49%; Coal charge moisture is between 9%~13%.Therefore from view of the data less than the accounting for about 90% of 5mm, can reach 49% less than all maximums of 0.5mm, it is less to pulverize back feed coal particle diameter, humidity is bigger, very easily forms thin wet.And the particle diameter of the water content of coal grain and coal grain has direct relation, and particle diameter is more little, and specific area is big more, and moisture content is big more, so inevitable requirement holdup time in drier longerly relatively just can reach better drying effect.Be difficult for drying so pulverize the back coal charge, the heat drying time that needs also requires longer, and conventional fluid bed does not often reach desirable drying effect because the bed segment length is limited.And coal damping drying device of the present invention can make the coal charge of various particle diameters be able to dry to greatest extent damping (humidity reduces more than 4%), making moisture lower bulky grain be detained very short time is discharged by the form valve, and in, fine grained holdup time in drier is longer, make its flow path longer to reach good drying, microparticle is then taken out of by air-flow until sack cleaner, be the longest drying time, this device has reached the effect of energy-saving and emission-reduction greatly in this way, has favorable economic benefit and social benefit.

Claims (10)

1. utilize the coke oven hot flue gases to the evenly dry humidity control device of different-grain diameter coking coal, comprise dryer shell, coke oven hot flue gases inlet, flue gas outlet, not damping coking coal inlet, dry back coal export, it is characterized in that, in dryer shell, be provided with the material dispersal device, on the dryer shell inwall, be provided with the baffle plate one of a plurality of downward-sloping interlaced arrangement.
2. the coke oven hot flue gases that utilizes according to claim 1 is characterized in that to the evenly dry humidity control device of different-grain diameter coking coal described material dispersal device constitutes by coal charge being stirred throwing diffusing tooth bar and rotating shaft.
3. the coke oven hot flue gases that utilizes according to claim 1 and 2 is characterized in that the evenly dry humidity control device of different-grain diameter coking coal, also is provided with baffle plate two on the described dryer shell inwall, is sandwich between baffle plate two and the dryer shell.
4. the coke oven hot flue gases that utilizes according to claim 3 is to the evenly dry humidity control device of different-grain diameter coking coal, it is characterized in that, described baffle plate two is provided with baffle plate three with the sandwich top that dryer shell constitutes, and baffle plate three is a plurality of, is provided with the space between each baffle plate three.
5. the coke oven hot flue gases that utilizes according to claim 1 and 2 is to the evenly dry humidity control device of different-grain diameter coking coal, it is characterized in that, the lower case cross section of described dryer shell is less than the upper body cross section, and the middle and lower part housing is made up of the identical drying joint that has baffle plate one of a plurality of structures.
6. the coke oven hot flue gases that utilizes according to claim 1 and 2 is characterized in that to the evenly dry humidity control device of different-grain diameter coking coal described dryer shell outer wall is provided with vibrator.
7. the coke oven hot flue gases that utilizes according to claim 1 and 2 is to the evenly dry humidity control device of different-grain diameter coking coal, it is characterized in that the blanking end of described baffle plate one can be the shape of square termination, semicircle termination, oval termination, profile of tooth termination, fiery a plurality of round end petals termination.
8. the coke oven hot flue gases that utilizes according to claim 1 and 2 is characterized in that to the evenly dry humidity control device of different-grain diameter coking coal described baffle plate one is a loose structure.
9. the coke oven hot flue gases that utilizes according to claim 1 and 2 is characterized in that to the evenly dry humidity control device of different-grain diameter coking coal described dryer shell bottom is provided with level-sensing device, and level-sensing device is chain with the airtight form material casting device at coal export place, dry back.
10. the coke oven hot flue gases that utilizes according to claim 1 and 2 is characterized in that to the evenly dry humidity control device of different-grain diameter coking coal described not damping coking coal porch is provided with airtight form material casting valve.
CN2010102916141A 2010-09-26 2010-09-26 Humidifier for uniformly drying coking coal of different particle diameters by using hot flue gas of coke furnace CN101936648B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102304376A (en) * 2011-04-02 2012-01-04 中冶焦耐(大连)工程技术有限公司 Full-boiling vibration propelled coal moisture control process
CN102818441A (en) * 2012-08-23 2012-12-12 东北大学 Rotary flash-evaporation drying machine
CN103160291A (en) * 2011-12-09 2013-06-19 新疆美特镁业有限公司 Powdered coal coking device and powdered coal coking method
CN104315823A (en) * 2014-10-23 2015-01-28 府谷县奥维加能焦电化工有限公司 Semi coke dewatering device and method
CN105258481A (en) * 2015-11-16 2016-01-20 西安航天华威化工生物工程有限公司 Pulverized coal drier
CN107513395A (en) * 2017-09-12 2017-12-26 天津大学 Coking coal dries the method and apparatus that surface thickening is coaling in a kind of coking industry
CN107576190A (en) * 2017-07-31 2018-01-12 新兴能源装备股份有限公司 The tower drier that a kind of waste heat from tail gas recycles

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SU1643902A1 (en) * 1988-11-21 1991-04-23 Государственный всесоюзный институт по проектированию предприятий коксохимической промышленности "Гипрококс" Dryer
CN2110515U (en) * 1991-12-31 1992-07-22 浙江省石油化工设计院 Planet flowing type integrated device for drying, pelletizing and capsulizing
CN2694125Y (en) * 2003-12-30 2005-04-20 电站锅炉煤清洁燃烧国家工程研究中心 Slime smoke drying device for power station boiler
JP2009120695A (en) * 2007-11-14 2009-06-04 Nippon Steel Corp Method for fluidized bed-drying and classifying coal
CN201557517U (en) * 2009-01-15 2010-08-25 上海亦晨信息科技发展有限公司 Drying apparatus with multi-dispersion structure
CN201858846U (en) * 2010-09-26 2011-06-08 中冶焦耐(大连)工程技术有限公司 Moisture control device utilizing coke oven hot flue gas to uniformly dry coking coals with different particle sizes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1643902A1 (en) * 1988-11-21 1991-04-23 Государственный всесоюзный институт по проектированию предприятий коксохимической промышленности "Гипрококс" Dryer
CN2110515U (en) * 1991-12-31 1992-07-22 浙江省石油化工设计院 Planet flowing type integrated device for drying, pelletizing and capsulizing
CN2694125Y (en) * 2003-12-30 2005-04-20 电站锅炉煤清洁燃烧国家工程研究中心 Slime smoke drying device for power station boiler
JP2009120695A (en) * 2007-11-14 2009-06-04 Nippon Steel Corp Method for fluidized bed-drying and classifying coal
CN201557517U (en) * 2009-01-15 2010-08-25 上海亦晨信息科技发展有限公司 Drying apparatus with multi-dispersion structure
CN201858846U (en) * 2010-09-26 2011-06-08 中冶焦耐(大连)工程技术有限公司 Moisture control device utilizing coke oven hot flue gas to uniformly dry coking coals with different particle sizes

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102304376A (en) * 2011-04-02 2012-01-04 中冶焦耐(大连)工程技术有限公司 Full-boiling vibration propelled coal moisture control process
CN102304376B (en) * 2011-04-02 2013-08-07 中冶焦耐(大连)工程技术有限公司 Full-boiling vibration propelled coal moisture control process
CN103160291B (en) * 2011-12-09 2016-06-08 新疆美特镁业有限公司 Fine coal coke making apparatus and make burnt method
CN103160291A (en) * 2011-12-09 2013-06-19 新疆美特镁业有限公司 Powdered coal coking device and powdered coal coking method
CN102818441B (en) * 2012-08-23 2014-06-18 东北大学 Rotary flash-evaporation drying machine
CN102818441A (en) * 2012-08-23 2012-12-12 东北大学 Rotary flash-evaporation drying machine
CN104315823A (en) * 2014-10-23 2015-01-28 府谷县奥维加能焦电化工有限公司 Semi coke dewatering device and method
CN105258481A (en) * 2015-11-16 2016-01-20 西安航天华威化工生物工程有限公司 Pulverized coal drier
CN107576190A (en) * 2017-07-31 2018-01-12 新兴能源装备股份有限公司 The tower drier that a kind of waste heat from tail gas recycles
CN107513395A (en) * 2017-09-12 2017-12-26 天津大学 Coking coal dries the method and apparatus that surface thickening is coaling in a kind of coking industry
CN107513395B (en) * 2017-09-12 2020-06-26 天津大学 Method and device for drying coking coal in coking industry, tackifying surface and charging coal

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