CN103421527B - Steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof - Google Patents

Steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof Download PDF

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CN103421527B
CN103421527B CN201210166019.4A CN201210166019A CN103421527B CN 103421527 B CN103421527 B CN 103421527B CN 201210166019 A CN201210166019 A CN 201210166019A CN 103421527 B CN103421527 B CN 103421527B
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coal
flue gases
classifier
steam
fine
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CN103421527A (en
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赵旭
窦岩
詹仲福
令永功
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NATIONAL DRYING TECHNOLOGY AND EQUIPMENT ENGINEERING TECHNOLOGY RESEARCH CENTER
Tianhua Institute of Chemical Machinery and Automation Co Ltd
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NATIONAL DRYING TECHNOLOGY AND EQUIPMENT ENGINEERING TECHNOLOGY RESEARCH CENTER
Tianhua Institute of Chemical Machinery and Automation Co Ltd
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Abstract

The invention relates to a steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof. The steam pipe drying, separating, and granulating integrated coal moisture control technology comprises following four key steps: steam pipe rotation drying, separating and grading, collecting and filtering, and compressing and granulating. The steam pipe rotation drying step is capable of increasing 7 to 11% of the production capacity of coke ovens, increasing about 8% of the gas yield of the coke ovens, saving about 14% of the energy of the coke ovens, and improving coke quality greatly; the separating and grading step is capable of reducing the influences of fine coal powder with a particle size less than 0.5mm on the operation of the coke ovens; and the compressing and granulating step is capable of taking waste materials such as the fine coal powder with a particle size less than 0.5mm and tar residue as a binder, and subjecting the waste materials to granulating after mixing, so that products with a coal particle size of 3 to 8mm are obtained, operating requirements of the coke ovens are met, coal powder loss is reduced, and the atmospheric environment is protected.

Description

Vapour pipe is dry, sorting, granulating integrated coal humidifying technology and specific equipment thereof
Technical field
The present invention relates to coking coal processing technique field, belong to a kind of coke-oven coal damping, dry, sorting, the method for granulation and the equipment that the method is used.The method and equipment are also applicable to dry, the dehydration of the coal such as brown coal, long-flame coal.
Background technology
The existing coke production production capacity of China accounts for No. 1 in the world, coking coal moisture is higher, and high-quality caking coal worsening shortages, around existing coke oven and coking production technique, exploitation improves coke quality and utilizes novel process, the new technology of coking waste heat is to adapt to enterprise development, improves the effective way of Business Economic Benefit.
Coal is dry is to utilize additional heat energy that coking coal materials is dried at pit kiln, dewaters to reduce into the moisture of stove coal or to the moisture that enters stove coal and regulate outward with the ultimate principle of coal damping, controlling coking energy input, improve coking technique, improve coke quality or expand the coking technology of caking coal consumption.In coal coking process, moisture does not participate in coking.Coal is after super-dry or damping, and coal charge moisture reduces and be stable.Coal charge moisture reduces, and the coal charge at coking chamber center and Center Temperature of Coke Cake was shortened in the residence time of 100 DEG C of left and right, thereby can shorten coking time, raising rate of heating, minimizing coking heat consumption.After the dry or damping of coal, shove charge improves mobility, and the gap between coal particle is easily filled up mutually, can make shove charge coal density increase.Shove charge coal density increases and coking speed accelerates to make coke oven throughput to improve, and improves coke quality or multiplex high volatile component weak bonding property coal coking.
Coking coal in coke oven moisture control method can reduce and stablize the moisture of controlling into stove coal, the difference dry with coal is not pursue the moisture of removing to greatest extent into stove coal, and only moisture stabilization in relatively low level, both can reach the object that increases benefit, do not cause again the difficulty of coke oven and recovery system operation because moisture is too low, make to stablize texts into the increase of stove coal density, coke and Chemicals volume increase, the minimizing of coke oven heating coal gas amount, coke quality raising and coking technique.
Coking coal humidity adjustment, dry after, owing to there are a large amount of fine powders, directly send into coke oven and use, easily cause coke oven top junction graphite, affect normal running, and causes that effuser and upcast stop up, processing power, the large contaminate environment of dust etc. of coalingging of impactization product; For fear of the impact of fine breeze on coke oven after damping, adopt a kind of method of sorting classifying that the fine breeze that is less than 0.5mm in coking coal is separated, then utilize coke tar refuse the like waste as binding agent, after being uniformly mixed, carry out extruder grain, the small-particle of 3 ~ 8mm after granulation enters coking by coke oven after simply mixing with the macrobead after classification, can improve coke quality, production capacity, has the impact that can reduce coking technique.
Summary of the invention
In view of above-mentioned, coking coal vapour pipe that the present invention proposes is dry, sorting classifying and prilling process ,by the dry moisture controlled of wet coal metering, vapour pipe rotary drying, vent gas treatment, steam condensate recovery, sorting classifying, extruder grain, safeguard protection and wet coal reach coking coal in coke oven damping, be dried, the object of sorting classifying, extruder grain.
Another object of the present invention is to provide the specific equipment that aforesaid method uses.Its key equipment---steam-tube rotatory dryer, classifier and Squeezinggranulator, the superheated vapour that utilizes dry coke quenching to produce is thermal source, adopts the mode of indirect heat transfer to be dried material; Classifier carries out sorting classifying to coking coal after utilizing flue gases of cock oven pressurization, after the fine breeze after classification mixes with coke tar refuse, carries out extruder grain, and the coal particle after granulation mixes with the macrobead of classification, enters in the lump coke oven and uses.
Object of the present invention can be achieved through the following technical solutions:
A kind of coking coal vapour pipe is dry, sorting classifying and prilling process ,by the dry moisture controlled of wet coal metering, vapour pipe rotary drying, vent gas treatment, steam condensate recovery, sorting classifying, extruder grain, safeguard protection and wet coal reach coking coal in coke oven damping, be dried, the object of sorting classifying, extruder grain, it is characterized in that:
A. vapour pipe rotary drying
The wet coal of run coal bin (1) records after temperature-10 ~ 20 DEG C, water-content 11 ~ 16% parameters through deironing, except foreign matter and on-line analysis, pass through Weighing, quantitatively send into steam-tube rotatory dryer by feeding spiral conveyer, in wet coal and steam-tube rotatory dryer, be filled with saturation steam, or after the abundant contact heat-exchanging of the tubulation of superheated vapour, moisture is evaporated, and obtains after qualified product, is delivered to coking by coke oven uses by discharging spiral conveyor; In this process, by recirculation blower, part flue gases of cock oven is sent in steam-tube rotatory dryer, contact in the same way with the wet coal that enters inside, the water vapor simultaneously wet coal being evaporated carries out steam-tube rotatory dryer, under the effect of exhaust blower, flue gases of cock oven carries out the water vapour that contains a small amount of fine breeze and enters into sack cleaner, carries out gas solid separation, isolated fine breeze is delivered to extruder grain unit, and flue gases of cock oven and water vapour are emptying after purifying; With wet coal heat exchange, enter into lime set flash distillation recovery system after becoming lime set in steam-tube rotatory dryer;
B. sorting classifying
Through the dried coking coal of damping, be delivered to chain mat machine with discharging spiral conveyor, then enter weighing silo, after Weighing, be evenly sent in classifier by feeding serew transfer roller, the bottom of feeding serew transfer roller is along the inner fluting of classifier, groove width is changed from small to big, bottom arranges flow deflector, several airflow holes are set on flow deflector, one time flue gases of cock oven enters into classifier flow deflector bottom after the first booster fan pressurization, from bottom to top pass through airflow hole, make after damping fine breezes a large amount of in dry coal in fluidized state, carry out first classification, fine breeze is being collected under the effect of filtering afterbody induced draft fan, enter into classifier top with flue gases of cock oven, carry out macrobead sedimentation, satisfactory product enters into collection filtering system with flue gases of cock oven, still there are a large amount of fine breezes in the coking coal carrying out after first classification, fine breeze continues to fall to classifier bottom along flow deflector outside, carry out secondary grading, this position arranges hoop grid distributor, on hoop grid distributor, airflow hole is set, coking coal moves down in process along hoop grid distributor, fully contact with the secondary flue gases of cock oven after the second booster fan pressurization, progressively complete sepn process, a large amount of fine breeze fluidisations is separated, enter into classifier top with flue gases of cock oven, carry out the sedimentation of secondary macrobead, satisfactory product also enters into collection filtering system with flue gases of cock oven, carry out coking coal after secondary grading, a large amount of fine breezes are separated, for ensureing good separating effect and adjustable operation, three flue gases of cock ovens after the 3rd booster fan pressurization contact and carry out three classifications with the coking coal of process secondary grading, the fine breeze of classification enters into classifier top with flue gases of cock oven equally, carry out macrobead sedimentation, satisfactory product enters into collection filtering system with flue gases of cock oven,
C. collect and filter
Fine breeze after three grades of sortings enters into collection filtering system with flue gases of cock oven, adopt deep bed filter to carry out gas solid separation, separate lower fine breeze from the discharge of deep bed filter bottom, flue gases of cock oven and nitrogen carry out after inerting emptying under the effect of induced draft fan;
D. extruder grain
Through the fine breeze of sack cleaner and the discharge of deep bed filter bottom, be assigned to by scraper conveyor in the surge bunker of extruder grain unit, surge bunker arranges nitrogen purging protection; After pressing metering, 94 ~ 95% fine breezes are sent in high speed blender as binding agent in the lump with the coke tar refuse the like waste of metering rear 5 ~ 6%; evenly mix at 60 ~ 80 DEG C; then undertaken degassed by bevel-type feeding machine; and be pressed into and in Squeezinggranulator, carry out granulation; obtaining coal particle size is 3 ~ 8mm product, and after granulation, granular pile density is 0.6 ~ 0.8t/m 3.A large amount of coking coal of discharging with classifier bottom again, after mixing, send into coking by coke oven in the lump.
The specific equipment of realizing aforesaid method, comprising: 1. vapour pipe rotary drying unit; 2. sorting classifying unit; 3. collect filtering unit; 4. extruder grain unit.
1. vapour pipe rotary drying unit is made up of run coal bin, constant feeder, feeding spiral conveyer, recirculation blower, exhaust blower, sack cleaner, discharging spiral conveyor, lime set flash distillation recovery system:
Run coal bin is used for storing through deironing, except foreign matter and on-line analysis and records temperature, the wet coal of water-content;
Constant feeder is by wet run coal bin coal Weighing;
Feeding spiral conveyer, its effect is that wet Weighing coal is sent into steam-tube rotatory dryer;
Steam-tube rotatory dryer by feeding spiral conveyer enter material stir, be dried, broken and be classified as the Multifunction drier of one;
Recirculation blower effect is that part flue gases of cock oven is sent in steam-tube rotatory dryer, contacts in the same way with entering inner wet coal, and the water vapor simultaneously wet coal being evaporated carries out steam-tube rotatory dryer;
Exhaust blower is flue gases of cock oven to be carried out to the water vapour that contains a small amount of fine breeze enter into sack cleaner;
Sack cleaner carries out gas solid separation by dried steam-tube rotatory dryer material with in company with the air entering;
Its effect of discharging spiral conveyor is dried steam-tube rotatory dryer material to be delivered to coking by coke oven use;
Its effect of lime set flash distillation recovery system is to become lime set with wet coal heat exchange in recovered steam pipe rotary dryer;
2. sorting classifying unit is made up of discharging spiral conveyor, chain mat machine, weighing silo, feeding serew transfer roller, classifier, the first booster fan, induced draft fan, the second booster fan, the 3rd booster fan;
Its effect of discharging spiral conveyor is that dried steam-tube rotatory dryer coking coal is delivered to chain mat machine;
Weighing silo effect is by chain mat machine coking coal Weighing;
Feeding serew transfer roller, its effect is that weighing silo Weighing coking coal is evenly sent in classifier;
Classifier effect is the coking coal that feeding serew transfer roller is sent into, and in the flow process of coal separation, coking coal is carried out to size classification;
After the first booster fan pressurization, by flow deflector overdraught hole, the coking coal that enters classifier is carried out to first classification, the fine powder that is less than 0.5mm is separated;
Induced draft fan is used for the coking coal of first classification to enter into classifier top with flue gases of cock oven, carries out macrobead sedimentation, and satisfactory product is entered into collection filtering system with flue gases of cock oven;
The second booster fan carries out secondary grading to coking coal, further the fine breeze fluidisation that is less than 0.5mm is separated, and satisfactory product enters into collection filtering system with flue gases of cock oven;
The 3rd booster fan coking coal carries out three classifications, and satisfactory product enters into collection filtering system with flue gases of cock oven;
3. collecting filtering unit is made up of deep bed filter, induced draft fan;
Deep bed filter effect is that the fine breeze after three grades of sortings is carried out to gas solid separation with flue gases of cock oven, and the fine breeze under separating is discharged from deep bed filter bottom;
Its effect of induced draft fan is by emptying the flue gas separating from sack cleaner;
This unit enters into deep bed filter by the fine breeze after three grades of sortings with flue gases of cock oven and carries out gas solid separation, and the fine breeze under separating is discharged from deep bed filter bottom, and flue gases of cock oven is emptying under the effect of induced draft fan after purifying;
4. extruder grain unit by sack cleaner, by scraper conveyor, surge bunker, high speed blender, bevel-type feeding machine, Squeezinggranulator form;
Sack cleaner effect is the fine breeze that bottom is discharged, and is assigned in the surge bunker of extruder grain unit by scraper conveyor;
The coke tar refuse the like waste that high speed blender is used for fine breeze to measure with process after metering, as binding agent, evenly mixes;
Bevel-type feeding machine is used for removing high speed blender gas;
Squeezinggranulator, for the fine breeze mixing and coke tar refuse the like waste are carried out to granulation as binding agent, obtains qualified product.
The beneficial effect of advantage of the present invention and generation is:
1, in the present invention's employing, pressure or low-pressure residual heat steam are dried damping to coking coal, then the coking coal after adopting flue gases of cock oven to damping carries out classification, reduce particle diameter and be less than the impact on coking technique of fine breeze below 0.5mm, reduce oven top of coke oven calculus mill phenomenon, prevent that effuser and upcast from stopping up; After the fine breeze that is less than 0.5mm after classification utilizes coke tar refuse the like waste to mix as binding agent; adopt tablets press to carry out extruder grain; particle diameter 3 ~ 8mm; to meet the service requirements of coke oven; reduce coal dust loss, reduce the dust polluting environment texts of coalingging, improve coke quality; make energy-conservation 14% left and right of coke oven, reduce raw materials cost.Improve coke oven productivity 7 ~ 11% left and right; Improve coke-oven gas output 8% left and right;
The features such as 2, damping equipment of the present invention adopts steam-tube rotatory dryer, and processing power is large, and simple to operate, stable, maintenance cost is few; Dry carrier gas contacts in the same way with wet coal, flue gases of cock oven between 180 DEG C ~ 220 DEG C of carrier gas employings, and flue gases of cock oven belongs to waste gas and belongs to UTILIZATION OF VESIDUAL HEAT IN, when water vapor is carried out to steam-tube rotatory dryer, plays safeguard protection effect; In classifier sorting fine breeze, can play the desiccation to fine breeze, reduce steam consumption;
3, stop up when preventing that the inner coking coal of classifier from moving, the angle of the flow deflector of classifier setting of the present invention and hoop grid distributor and horizontal plane is all greater than 70 °; On flow deflector and grid distributor, airflow hole is set, ensures fine breeze and even loose separation of macrobead blanking, be convenient to fluidisation sorting; The fine particle meeting the demands, under the carrying of flue gases of cock oven, enters deep bed filter by classifier top, after the fine breeze under collecting and coke tar refuse are mixed according to a certain percentage, enter tablets press and carry out extruder grain, the product of granulation is delivered directly in coke oven and uses;
After entering udst separation, 4 flue gases of cock ovens and a small amount of nitrogen directly discharged; Safety economy, protection of the environment, meets national industrial policies.
Brief description of the drawings
Fig. 1 is that vapour pipe is dry, sorting, granulating integrated coal humidifying technology schema.
Fig. 2 is the steam-tube rotatory dryer structural representation that the present invention adopts.
Fig. 3 is the classifier schematic diagram that the present invention adopts.
Fig. 4 is the side-view of Fig. 3.
Fig. 5 is the deep bed filter schematic diagram that the present invention adopts.
Fig. 6 is the side-view of Fig. 5
Fig. 7 is the Squeezinggranulator schematic diagram that the present invention adopts.
Fig. 8 is the side-view of Fig. 7.
Embodiment
Below in conjunction with accompanying drawing, invention technical scheme is further described again:
A kind of vapour pipe is dry, sorting, granulating integrated coal damping drying means, is undertaken by vapour pipe rotary drying, sorting classifying, collection filtration, four essential elements of extruder grain:
A. vapour pipe rotary drying
The wet coal of run coal bin 1 records after the parameter such as temperature, water-content through deironing, except foreign matter and on-line analysis, by Weighing 2, quantitatively send into the steam-tube rotatory dryer 4(patent No. by feeding spiral conveyer 3: 2,004 2 0041963.8, it magnificent chemical machinery and the design of automation design institute), in wet coal and steam-tube rotatory dryer 4, be filled with 0.4 ~ 2.0MPa, temperature lower than superheated vapour or the saturation steam of 300 DEG C, after the abundant contact heat-exchanging of tubulation, moisture is evaporated, obtain after qualified product, be delivered to coking by coke oven by discharging spiral conveyor 14 and use; In this process, by recirculation blower 10, part flue gases of cock oven is sent in steam-tube rotatory dryer 4, contact in the same way with entering inner wet coal, the water vapor simultaneously wet coal being evaporated carries out steam-tube rotatory dryer 4, improves drying efficiency.Under the effect of exhaust blower 6, flue gases of cock oven carries out the water vapour that contains a small amount of fine breeze and enters into sack cleaner 5, carries out gas solid separation, and isolated fine breeze is delivered to extruder grain unit, and flue gases of cock oven and water vapour are emptying after purifying.As the middle pressure of thermal source or low-pressure steam in steam-tube rotatory dryer 4 with wet coal heat exchange, enter into lime set flash distillation recovery system 19 after becoming lime set.In drying process, safety precautions adopts coke oven flue waste gas and nitrogen as inerting gas, reduces oxygen level, prevents from dodging quick-fried firing accident and occurs.Wet coal moisture control is by wet coal variable, wet moisture content of coal value, wet coal temperature value, product water score value, steam consumption value parameter, controls the moisture content of product as manipulated variable.
B. sorting classifying
Through the dried coking coal of damping, be delivered to chain mat machine 15 with discharging spiral conveyor 14, then enter weighing silo 16, after Weighing, be evenly sent in classifier 18 by feeding serew transfer roller 17, the bottom of feeding serew transfer roller 17 is along the inner fluting of classifier 18, and groove width is changed from small to big, and bottom arranges flow deflector 25, ensure that blanking is evenly loose, be convenient to fluidisation sorting; On flow deflector 25, airflow hole is set, percentage of open area 10% ~ 20%, one time flue gases of cock oven enters into flow deflector 25 bottoms after the first booster fan 13 pressurizations, from bottom to top pass through airflow hole, make after damping fine breezes a large amount of in dry coal in fluidized state, carry out first classification, it is being collected under the effect of filtering afterbody induced draft fan 9, with coke oven flue tolerance 47000~50000m 3/ h enters into classifier 18 tops, carries out macrobead sedimentation, and satisfactory product enters into collection filtering system with flue gases of cock oven; Still there are a large amount of fine breezes in the coking coal carrying out after first classification, continue to fall along flow deflector 25 outsides to classifier bottom, carry out secondary grading, this position arranges hoop grid distributor 24, on grid distributor 24, airflow hole is set, percentage of open area 10% ~ 20%, coking coal moves down in process along grid distributor, with after the second booster fan 12 pressurizations, with 48500m 3bis-coke oven flue tolerance of/h fully contact, progressively complete sepn process, a large amount of fine breeze fluidisations is separated, enter into classifier top with flue gases of cock oven, carry out the sedimentation of secondary macrobead, satisfactory product also enters into collection filtering system with flue gases of cock oven; Carry out coking coal after secondary grading, a large amount of fine breezes are separated, for ensureing good separating effect and adjustable operation, three flue gases of cock ovens after adding the 3rd booster fan 11 pressurizations contact and carry out three classifications with the coking coal of process secondary grading, the fine breeze of classification enters into classifier top with flue gases of cock oven equally, carry out macrobead sedimentation, satisfactory product enters into collection filtering system with flue gases of cock oven.One, two, three classification all can be carried out component adjusting according to actually operating, is convenient to controllable operating, and can, according to the size of Cut size effect selection classification number of times and adjusting coke oven flue tolerance, realize effectively and utilizing; The a large amount of particulate coal of classified rear residue is discharged from classifier 18 bottoms, is delivered to coke oven uses by rotary conveyor.
C. collect and filter
Fine breeze after three grades of sortings enters into collection filtering system with flue gases of cock oven, adopts deep bed filter 8 to carry out gas solid separation, and the fine breeze under separating is discharged from deep bed filter 8 bottoms, and flue gases of cock oven is emptying under the effect of induced draft fan 9 after purifying; In fine breeze sepn process, because fines concentration is high, easily dodge quick-friedly, should carry out inerting, Control for Oxygen Content 2-3% by flue gases of cock oven and nitrogen.
D. extruder grain
Through the fine breeze of sack cleaner 5 and deep bed filter 8 bottoms discharges, be assigned to by scraper conveyor 7 in the surge bunker 20 of extruder grain unit, surge bunker 20 arranges nitrogen purging protection; Fine breeze is sent in the lump in high speed blender 21 as binding agent after metering with through the coke tar refuse the like waste of metering, evenly mix, then undertaken degassed by bevel-type feeding machine 22, and be pressed into and in Squeezinggranulator 23, carry out granulation, obtaining coal particle size is 3 ~ 8mm product, again with classifier 18 bottoms discharge a large amount of coking coal, after mixing, send in the lump coking by coke oven; Extruder grain needs the usage quantity of coke tar refuse to be about 5 ~ 6%, and the mixing temperature of fine breeze and coke tar refuse is about 60 ~ 80 DEG C, can reach good granulation effect, and the granular pile density after granulation is about 0.6 ~ 0.8t/m 3, be difficult for coke oven furnace wall to produce pressure, reduce oven top of coke oven calculus mill phenomenon, prevent that effuser and upcast from stopping up, the treatment effect of raisingizations product, reduction are coaling dust polluting environment texts.

Claims (3)

1. dry, the sorting of vapour pipe, a granulating integrated coal moisture control method, its step is divided into:
A. vapour pipe rotary drying
The wet coal of run coal bin (1) records after temperature-10 ~ 20 DEG C, water-content are 11 ~ 16% through deironing, except foreign matter and on-line analysis, pass through Weighing, quantitatively send into steam-tube rotatory dryer (4) by feeding spiral conveyer (3), in wet coal and steam-tube rotatory dryer (4), be filled with saturation steam, or after the abundant contact heat-exchanging of the tubulation of superheated vapour, moisture is evaporated, and obtains after qualified product, is delivered to coking by coke oven uses by discharging spiral conveyor (14), in this process, by recirculation blower (10), part flue gases of cock oven is sent in steam-tube rotatory dryer (4), contact in the same way with the wet coal that enters inside, the water vapor simultaneously wet coal being evaporated carries out steam-tube rotatory dryer (4), under the effect of exhaust blower (6), flue gases of cock oven carries out the water vapour that contains a small amount of fine breeze and enters into sack cleaner (5), sack cleaner (5) carries out gas solid separation by the dried material of steam-tube rotatory dryer (4) with in company with the air entering, isolated fine breeze is delivered to extruder grain unit, flue gases of cock oven and water vapour are emptying after purifying, the interior saturation steam of steam-tube rotatory dryer (4), or superheated vapour and wet coal heat exchange, enter into lime set flash distillation recovery system (19) after becoming lime set,
B. sorting classifying
Through the dried coking coal of damping, be delivered to chain mat machine (15) with discharging spiral conveyor (14), then enter weighing silo (16), after Weighing, be evenly sent in classifier (18) by feeding serew transfer roller (17), the bottom of feeding serew transfer roller (17) is along the inner fluting of classifier (18), groove width is changed from small to big, bottom arranges flow deflector (25), flow deflector arranges airflow hole on (25), one time flue gases of cock oven enters into flow deflector (25) bottom in classifier (18) after the first booster fan (13) pressurization, from bottom to top pass through airflow hole, make after damping fine breezes a large amount of in dry coal in fluidized state, carry out first classification, fine breeze is being collected under the effect of filtering afterbody induced draft fan (9), enter into classifier (18) top with flue gases of cock oven, carry out macrobead sedimentation, satisfactory product enters into collection filtering system with flue gases of cock oven, still there are a large amount of fine breezes in the coking coal carrying out after first classification, continue to fall to classifier (18) bottom along flow deflector (25) outside, carry out again secondary grading, this position arranges hoop grid distributor (24), hoop grid distributor arranges airflow hole on (24), coking coal moves down in process along the interior hoop grid distributor of classifier (18) (24), fully contact with the secondary flue gases of cock oven after the second booster fan (12) pressurization, progressively complete sepn process, a large amount of fine breeze fluidisations is separated, enter into classifier (18) top with flue gases of cock oven, carry out the sedimentation of secondary macrobead, satisfactory product also enters into collection filtering system with flue gases of cock oven, carry out coking coal after secondary grading, a large amount of fine breezes are separated, three flue gases of cock ovens after the 3rd booster fan (11) pressurization contact and carry out three classifications with the coking coal of process secondary grading again, the fine breeze of classification enters into classifier (18) top with flue gases of cock oven equally, carry out macrobead sedimentation, satisfactory product enters into collection filtering system with flue gases of cock oven,
C. collect and filter
Fine breeze after three grades of classifiers (18) sorting enters into collection filtering system with flue gases of cock oven, adopt deep bed filter (8) to carry out gas solid separation, fine breeze under separating is discharged from deep bed filter (8) bottom, and flue gases of cock oven is emptying under the effect of induced draft fan (9) after purifying;
D. extruder grain
Through the fine breeze of sack cleaner (5) and the discharge of deep bed filter (8) bottom, be assigned to by scraper conveyor (7) in the surge bunker (20) of extruder grain unit, surge bunker (20) arranges nitrogen purging protection; Be sent in the lump in high speed blender (21) as binding agent through the coke tar refuse waste of metering with 5 ~ 6% after metering by 94 ~ 95% fine breezes; evenly mix at 60 ~ 80 DEG C; then undertaken degassed by bevel-type feeding machine (22); and be pressed in Squeezinggranulator (23) and carry out granulation; obtaining coal particle size is 3 ~ 8mm product, and after granulation, granular pile density is 0.6 ~ 0.8t/m 3; A large amount of coking coal of discharging with classifier (18) bottom again, after mixing, send into coking by coke oven in the lump.
2. dry, the sorting of a kind of vapour pipe according to claim 1, granulating integrated coal moisture control method, after it is characterized in that damping, coking coal adopts three grades of classifiers to carry out sorting, its Main Function of first step sorting is that the fine coal that is entered classifier (18) by feeding spiral conveyer (3) is uniformly distributed, and the fine powder that simultaneously part can be less than to 0.5mm is separated; Sorting its Main Function in the second stage is further will to enter the coal dust homogenizing of classifier, further the fine powder of 0.5mm is separated and is taken out of simultaneously; It is 15 ~ 30m/s that the third stage is sorted into implication Flow Velocity, the dust that is less than 2mm can be brought into the settling section of classifier (18), wind speed will be greater than the particles settling of 0.5mm after reducing, be less than 0.5mm particle and taken out of classifier (18) by flue gases of cock oven, reach the object of classification.
3. complete the specific equipment that method claimed in claim 1 is used, comprising:
Run coal bin (1) records temperature, the wet coal of water-content for storing through deironing, except foreign matter and on-line analysis;
Constant feeder (2) is by wet run coal bin (1) coal Weighing;
Feeding spiral conveyer (3), its effect is that wet Weighing coal is sent into steam-tube rotatory dryer (4);
Steam-tube rotatory dryer (4) by feeding spiral conveyer (3) enter material stir, be dried, broken and be classified as the Multifunction drier of one;
Recirculation blower (10) effect is that part flue gases of cock oven is sent in steam-tube rotatory dryer (4), contacts in the same way with entering inner wet coal, and the water vapor simultaneously wet coal being evaporated carries out steam-tube rotatory dryer (4);
Exhaust blower (6) is flue gases of cock oven to be carried out to the water vapour that contains a small amount of fine breeze enter into sack cleaner (5);
Sack cleaner (5) carries out gas solid separation by the dried material of steam-tube rotatory dryer (4) with in company with the air entering;
Its effect of discharging spiral conveyor (14) is the dried material of steam-tube rotatory dryer (4) to be delivered to coking by coke oven use;
Its effect of lime set flash distillation recovery system (19) is to become lime set with wet coal heat exchange in recovered steam pipe rotary dryer (4);
Its effect of discharging spiral conveyor (14) is that the dried coking coal of steam-tube rotatory dryer (4) is delivered to chain mat machine (15);
Weighing silo (16) effect is by chain mat machine (15) coking coal Weighing;
Feeding serew transfer roller (17), its effect is that weighing silo (16) Weighing coking coal is evenly sent in classifier (18);
Classifier (18) effect is the coking coal that feeding serew transfer roller (17) is sent into, and in the flow process of coal separation, coking coal is carried out to size classification;
After the first booster fan (13) pressurization, by flow deflector overdraught hole, the coking coal that enters classifier (18) is carried out to first classification, the fine powder that is less than 0.5mm is separated;
Induced draft fan (9) is used for the coking coal of first classification to enter into classifier top with flue gases of cock oven, carries out macrobead sedimentation, and satisfactory product is entered into collection filtering system with flue gases of cock oven;
The second booster fan (12) carries out secondary grading to coking coal, further the fine breeze fluidisation that is less than 0.5mm is separated, and satisfactory product enters into collection filtering system with flue gases of cock oven;
The 3rd booster fan (11) carries out three classifications to coking coal, and satisfactory product enters into collection filtering system with flue gases of cock oven;
Deep bed filter (8) effect is that the fine breeze after three grades of sortings is carried out to gas solid separation with flue gases of cock oven, and the fine breeze under separating is discharged from deep bed filter (8) bottom;
Its effect of induced draft fan (9) is by the fume emission separating from sack cleaner (5);
Sack cleaner (5) effect is the fine breeze that bottom is discharged, and is assigned in the surge bunker (20) of extruder grain unit by scraper conveyor (7);
High speed blender (21) for using fine breeze through metering after with through metering coke tar refuse the like waste as binding agent, evenly mix;
Bevel-type feeding machine (22) is for removing high speed blender (21) gas;
Squeezinggranulator (23), for the fine breeze mixing and coke tar refuse waste are carried out to granulation as binding agent, obtains qualified product.
CN201210166019.4A 2012-05-25 2012-05-25 Steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof Active CN103421527B (en)

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CN110305679B (en) * 2019-04-12 2021-04-27 武汉钢铁有限公司 Dry and wet coal mixing coking method capable of stabilizing dry coal throughput
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