CN101955783B - Device for simultaneously carrying out grading and moisture regulation on coking coal by utilizing coke oven hot flue gas - Google Patents
Device for simultaneously carrying out grading and moisture regulation on coking coal by utilizing coke oven hot flue gas Download PDFInfo
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- CN101955783B CN101955783B CN2010102916279A CN201010291627A CN101955783B CN 101955783 B CN101955783 B CN 101955783B CN 2010102916279 A CN2010102916279 A CN 2010102916279A CN 201010291627 A CN201010291627 A CN 201010291627A CN 101955783 B CN101955783 B CN 101955783B
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Abstract
The invention relates to the technical field of coal moisture regulating and drying, particularly relating to a device for simultaneously carrying out grading and moisture regulation on the coking coal by utilizing the coke oven flue gas. The device comprises a dryer shell, a coke oven hot flue gas inlet, and a flue gas outlet, a non-moisture irregulating coking coal inlet and a coal outlet after drying, and is characterized in that the dryer shell is provided with a material dispersing device; a plurality of downward sloping baffles (1) are arranged on the inner wall of the dryer shell; a fine material separator is also arranged on the inner wall of the dryer shell; the fine material separator penetrates along the inner wall at one side of the shell and is connected with the shell in a whole.. The device of the invention has reasonable structure design and high heat exchange efficiency of the coke oven flue gas and the wet coal, can carry out grading separation and grading drying on the crude particles, the fine particles and the microparticles of the raw material coal, and can achieve the requirements of saving energy, reducing emission and low-carbon life advocated by our country.
Description
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 the device that coking coal is carried out classification and damping simultaneously.
Background technology
Coke-oven plant's used coking coal when coking is all dry without crossing debugging at present, coal charge humidity is all about 10%, humidity is larger, coke oven needs to utilize this part excessive moisture of heated by gas in process of coking, so both wasted the energy, because be converted into volumetric expansion in the water vapour process by liquid water, cause the water vapour of generation to enter in the coke oven flue gas together again.And a large amount of 200 degrees centigrade of left and right sides stack gases that meanwhile produce in the process of coking directly are discharged in the atmosphere, and the flue gases of cock oven of discharging has not only polluted environment but also wasted the energy, do not meet very that national energy-saving reduces discharging, the requirement of 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 humidifying technology 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 stack gas waste heat as the coal conditioning technique of dry medium, therefore, adopt flue gases of cock oven to carry out the damping of coking coal dry, feasible damping drying installation reasonable in design is to be badly in need of at present the technical problem that solves.Although existing about adopting fluidized-bed to carry out the report of coal damping drying with the coke oven hot flue gases at present, be not widely used because the damping heat exchange efficiency is high.
Summary of the invention
The purpose of this invention is to provide the high coke oven hot flue gases that utilizes of a kind of reasonable in design, flue gases of cock oven and wet coal heat exchange efficiency and coking coal is carried out simultaneously the device of classification and damping, this device can be thick to feed coal, thin, microparticle carries out fractional separation and classification is dry, can 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 coking coal to be carried out simultaneously the device of classification and damping, comprise dryer shell, coke oven hot flue gases entrance, flue gas outlet, not damping coking coal entrance, dry after coal export, in dryer shell, be provided with material dispersing device, be provided with the baffle plate one of a plurality of downward-sloping staggered arrangement at the dryer shell inwall, also be provided with the fines separator on the dryer shell inwall, the fines separator runs through and is connected to the form setting of an integral body with housing along housing one side inwall.
Described material dispersing device consists of by coal charge being stirred throwing loose tooth bar and rotating shaft.
Described fines separator top is provided with baffle plate two in dryer shell inside, and baffle plate two is a plurality of, is provided with the space between each baffle plate two.
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 comprised of the identical drying joint with baffle plate one of a plurality of structures.
Described dryer shell outer wall is provided with vibrator.
The discharging end of described baffle plate one can be the shape of square termination, semicircle termination, oval termination, profile of tooth termination or a plurality of round end petals termination.
Described baffle plate one is vesicular structure.
Described dryer shell and fines separator bottom are equipped with level gage, and two level gages are chain with the airtight form throwing feeder at the airtight form throwing feeder in fine particulate coal exit and coarse particles coal export place respectively.
Described not damping coking coal ingress is provided with airtight form material casting valve.
Compared with prior art, the beneficial effects of the utility model are:
The utility model has maximally utilised the waste heat of unsaturated flue gases of cock oven, self property for coal charge before pulverizing, coal charge to each grade has carried out to greatest extent damping drying, can be thick to feed coal, thin, microparticle carries out fractional separation and classification is dry, reduce energy consumption, reduced the humidity of coking coal, thereby improved coke quality, greatly improve economic benefit, more met country to the requirement of energy-saving and emission-reduction.
Description of drawings
Fig. 1 utilizes the coke oven hot flue gases coking coal to be carried out simultaneously the structure sectional view of the device of classification and damping;
Fig. 2 is that the A of the utility model device baffle plate one in Fig. 1 is to parts drawing;
Fig. 3 is the vertical planning drawing of the utility model device coke oven hot flue gases inlet side.
Among the figure: the airtight form material casting of 1-valve 2-material dispersing device 3-baffle plate one 4-baffle plate two 5-fines separator 6-level gage 7-access door 8-dryer shell 9-are the outlet of the dry joint of the airtight form throwing feeder of damping coking coal entrance 10-11-fine particle outlet 12-coke oven hot flue gases entrance 13-flue gas outlet 14-15-rotating shaft 16-tooth bar 17-coarse particles not
Embodiment
See Fig. 1, Fig. 3, utilize the coke oven hot flue gases coking coal to be carried out simultaneously the device of classification and damping, comprise dryer shell 8, coke oven hot flue gases entrance 12, flue gas outlet 13, not damping coking coal entrance 9, dry after coal export 11, in dryer shell 8, be provided with material dispersing device 2, material dispersing device is made of tooth bar 16 and rotating shaft 15, rotating shaft 15 two ends are arranged on the dryer shell 8, thin wet granular coal can be stirred to throw and fall apart, simultaneously can prolong the residence time of coal charge in air-flow, make wet coal charge drying more abundant.Be provided with the baffle plate 1 of a plurality of downward-sloping staggered arrangement at dryer shell 8 inwalls, owing to the flow velocity that can change fine particle and stack gas that stops of baffle plate 1, prolong the heat exchanger time of coal charge and hot flue gases air-flow.
Also be provided with fines separator 5 on dryer shell 8 inwalls, fines separator 5 can run through and is connected to the form setting of an integral body with housing along housing one side inwall, sees Fig. 1.Fines separator 5 tops are provided with baffle plate 24 in dryer shell 8 inside, and baffle plate 24 is a plurality of, are provided with the space between each baffle plate two.Enter dryer shell top in, fine-particle coal can enter by the space between the baffle plate 24 fines separator 5, fallen into the hopper of bottom by fines separator 5, discharged by fine particle outlet 11.
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 comprised of the identical drying joint 14 with baffle plate 1 of a plurality of structures.The lower large little structure of this kind can be in the situation that the certain control of flue pneumatic transmission exhaust gas volumn cross section flow velocity, concrete size can be determined according to the size grading that will separate coal charge, these dryer shell 8 middle and lower parts are comprised of the identical drying joint with baffle plate 3 of a plurality of structures simultaneously, drying is successively counted n and can be required to set the present embodiment n=3 according to drying.Dryer shell 8 outer walls are installed vibrator simultaneously, and vibrator arranges rational vibrational frequency, can open vibrator and make its whereabouts when the coal grain accumulating amount on the baffle plate 1 is large.
The discharging 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 simultaneously a plurality of quantity on the baffle plate is beneficial to flue gas to be passed through, and is beneficial to the drying of coal charge.
Be equipped with level gage 6 at dryer shell 8 and fines separator 5 bottoms, it is chain that level gage 6 and fine particulate coal export the airtight form throwing feeder 10 at the airtight form throwing feeder at 11 places and coarse particles coal export 17 places.
The working process of this device is: before damping is pulverized coking coal by moisture eliminator not damping coking coal entrance 9 enter airtight form material casting valve 1, rotation along with airtight form material casting valve 1 blade, coking coal is thrown in the moisture eliminator along the direction of tremie pipe before pulverizing, and meanwhile the coke oven hot flue gases enters moisture eliminator inside by hot flue gases entrance 12.The coal charge major part that enters moisture eliminator drops on the material dispersing device 2, for the coal charge of larger particles (diameter d＞3mm), because the cross section flue gas flow rate of lower housing portion is less than this oarse-grained floating velocity, therefore macrobead can collide, rebound, stops with material dispersing device 2, falls at last the moisture eliminator hopper and is discharged by airtight form throwing feeder 10; For in; (diameter 3mm＞d＞0.5mm) can further be stirred throwing under the effect of material dispersing device 2 falls apart fine particle; 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 particle 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; it is finally fallen in fines separator 5 hoppers; airtight form throwing feeder by fines separator 5 hopper bottoms is discharged to the direct coking by coke oven that adds on the pulverizer belt afterwards, and microparticle then leaves moisture eliminator with air-flow and enters next stage sack cleaner purification separation.Wherein material dispersing device has not only played and loose effect is thrown in the stirring of thin wet granular has also prolonged simultaneously coal charge residence time in moisture eliminator in this course, has prolonged hot wet swap time, reaches better drying effect.Thick like this, thin, microparticle has carried out fractional separation and classification is dry, for putting on the standby coal belt of different particle diameter differences, macrobead enters before belt of pulverizer, small-particle then enters after the pulverizer on the belt, in this way coal carried out the energy consumption that the classification drying has reduced pulverizer simultaneously.
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 particle, microparticle, coarse particles coal charge can have been separated.This is that common employing fluidized-bed carries out the inaccessible effect of coal damping with the coke oven hot flue gases.
The grade of coking coal formed and humidity before the below narrated and pulverizes both at home and abroad at present, further illustrated principle of work of the present invention and beneficial effect.
Before present domestic coke-oven plant pulverized, the grade of coal is composed as follows: coal charge particle diameter d＞3mm's accounted for 40～45% in the feed coal; Coal charge particle diameter 3mm＞=d＞1mm accounts for 19～22%; Coal charge particle diameter 1mm＞=d＞0.5mm accounts for 8～11%; Coal charge particle diameter d＜=0.5mm accounts for 20～22%; Coal charge moisture is between 9%～14%.Therefore from view of the data less than the accounting for about 78% of 3mm, other coal charge of these grain-size grades does not need to enter pulverizer to be crossed and has pulverized, and only needs a dry damping to get final product.And approximately 45% greater than the coal grain of 3mm need dry after separately separating treatment enter pulverizer and pulverize rear adding coking by coke oven.Simultaneously because the water content of coal grain and the particle diameter of coal grain have direct relation, particle diameter is less, specific surface area is larger, water ratio is larger, therefore inevitable requirement residence time in moisture eliminator relatively longerly just can reach better drying, so the coal charge of different-grain diameter is different with intensity required time of drying, and the coal damping drying installation that this kind utilizes the coke oven hot flue gases to carry out damping to pulverizing front coal can make the coal charge of various particle diameters be able to greatest extent dry damping (humidity reduces more than 4%), making moisture lower macrobead be detained very short time is discharged by airtight form valve, and in, fine particle then is detained the long period, make its flowing-path longer to reach good drying, add coking by coke oven after entering at last the fines segregation device.Microparticle is then taken out of up to sack cleaner by air-flow, and time of drying is the longest, and this device has reached the effect of energy-saving and emission-reduction greatly in this way, has preferably economic benefit and social benefit.
Claims (8)
1. utilize the coke oven hot flue gases coking coal to be carried out simultaneously the device of classification and damping, comprise dryer shell, coke oven hot flue gases entrance, flue gas outlet, not damping coking coal entrance, dry after coal export, it is characterized in that, in dryer shell, be provided with the material dispersing device that is consisted of by tooth bar and rotating shaft, be provided with the baffle plate one of a plurality of downward-sloping staggered arrangement at the dryer shell inwall, also be provided with the fines separator on the dryer shell inwall, the fines separator runs through and is connected to the form setting of an integral body with housing along housing one side inwall.
2. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1, it is characterized in that, described fines separator top is provided with baffle plate two in dryer shell inside, and baffle plate two is a plurality of, is provided with the space between each baffle plate two.
3. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1, 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 comprised of the identical drying joint with baffle plate one of a plurality of structures.
4. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1 is characterized in that, described dryer shell outer wall is provided with vibrator.
5. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1, it is characterized in that, the discharging end of described baffle plate one can be the shape of square termination, semicircle termination, oval termination, profile of tooth termination or a plurality of round end petals termination.
6. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1 is characterized in that, described baffle plate one is vesicular structure.
7. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1, it is characterized in that, described dryer shell and fines separator bottom are equipped with level gage, and two level gages are chain with the airtight form throwing feeder at the airtight form throwing feeder in fine particulate coal exit and coarse particles coal export place respectively.
8. the device that utilizes the coke oven hot flue gases coking coal to be carried out simultaneously classification and damping according to claim 1 is characterized in that, described not damping coking coal ingress is provided with airtight form material casting valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102916279A CN101955783B (en) | 2010-09-26 | 2010-09-26 | Device for simultaneously carrying out grading and moisture regulation on coking coal by utilizing coke oven hot flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102916279A CN101955783B (en) | 2010-09-26 | 2010-09-26 | Device for simultaneously carrying out grading and moisture regulation on coking coal by utilizing coke oven hot flue gas |
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| Publication Number | Publication Date |
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| CN101955783A CN101955783A (en) | 2011-01-26 |
| CN101955783B true CN101955783B (en) | 2013-04-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102311746B (en) * | 2011-04-02 | 2013-12-04 | 中冶焦耐(大连)工程技术有限公司 | Full-boiling vibration propelled coal humidifying and grading process |
| CN106336883B (en) * | 2016-09-23 | 2019-12-03 | 武汉钢铁有限公司 | The fluidized bed partition of coking coal dry classification and the determination method of divider height |
Citations (3)
| 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 |
| 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 |
| CN201801491U (en) * | 2010-09-26 | 2011-04-20 | 中冶焦耐(大连)工程技术有限公司 | Device for simultaneously grading and humidifying coking coal by aid of coke oven thermal flue gas |
-
2010
- 2010-09-26 CN CN2010102916279A patent/CN101955783B/en active Active
Patent Citations (3)
| 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 |
| 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 |
| CN201801491U (en) * | 2010-09-26 | 2011-04-20 | 中冶焦耐(大连)工程技术有限公司 | Device for simultaneously grading and humidifying coking coal by aid of coke oven thermal flue gas |
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