CN103421527A - 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 PDFInfo
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- CN103421527A CN103421527A CN2012101660194A CN201210166019A CN103421527A CN 103421527 A CN103421527 A CN 103421527A CN 2012101660194 A CN2012101660194 A CN 2012101660194A CN 201210166019 A CN201210166019 A CN 201210166019A CN 103421527 A CN103421527 A CN 103421527A
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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
Technical field
The present invention relates to the coking coal processing technique field, belong to a kind of method of coke-oven coal damping, drying, sorting, granulation and the equipment that the method is used.The method and equipment also are applicable to drying, the dehydration of the coals 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.
The dry ultimate principle with the coal damping of coal is to utilize additional heat energy coking coal materials to be carried out outside pit kiln to drying, dehydration to reduce into the moisture of stove coal or the moisture that enters the stove coal is regulated, controlling the coking energy input, improve coking technique, improve coke quality or enlarge 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 ℃ of left and right, thereby can shorten coking time, raising rate of heating, minimizing coking heat consumption.After coal drying or damping, shove charge makes mobility improve, 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.
The coking coal in coke oven moisture control method can reduce and stablize the moisture of controlling into the stove coal, be not pursue with the difference of coal drying the moisture of removing to greatest extent into the stove coal, and only moisture stabilization in relatively low level, both can reach the purpose that increases benefit, because moisture is too low, do not cause again the difficulty of coke oven and recovery system operation, make to stablize texts into the increase of stove coal density, coke and Chemicals volume increase, coal gas amount minimizing for the coke oven heating, coke quality raising and coking technique.
After coking coal humidity adjustment, drying, owing to there being a large amount of fine powders, directly sending into coke oven and use, easily cause coke oven top junction graphite, affect normal running, and cause effuser and upcast obstruction, the processing power of impactization product, the large contaminate environment of dust etc. of coalingging; Impact for fear of fine breeze after damping on coke oven, 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 the 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 with the macrobead after classification after simple the mixing, can improve coke quality, production capacity, and the impact that can reduce coking technique is arranged.
Summary of the invention
In view of above-mentioned, coking coal vapour pipe drying, sorting classifying and prilling process that the present invention proposes
,Reach the purpose of coking coal in coke oven damping, drying, sorting classifying, extruder grain by wet coal metering, vapour pipe rotary drying, vent gas treatment, steam condensate recovery, sorting classifying, extruder grain, safeguard protection and the dry moisture controlled of wet coal.
Another object of the present invention is to provide the specific equipment that aforesaid method is used.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 carry out drying to material; Classifier carries out sorting classifying to coking coal after utilizing flue gases of cock oven pressurization, and the fine breeze after classification, with after coke tar refuse is mixed, carries out extruder grain, and the coal particle after granulation mixes with the macrobead of classification, enters in the lump the coke oven use.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of coking coal vapour pipe drying, sorting classifying and prilling process
,Reach the purpose of coking coal in coke oven damping, drying, sorting classifying, extruder grain by wet coal metering, vapour pipe rotary drying, vent gas treatment, steam condensate recovery, sorting classifying, extruder grain, safeguard protection and the dry moisture controlled of wet coal, it is characterized in that:
A. the vapour pipe rotary drying
The wet coal of run coal bin (1) is through deironing, except after foreign matter and on-line analysis record temperature-10 ~ 20 ℃, water-content 11 ~ 16% parameters, pass through Weighing, quantitatively by feeding spiral conveyer, send into steam-tube rotatory dryer, be filled with saturation steam in wet coal and steam-tube rotatory dryer, or after the abundant contact heat-exchanging of the tubulation of superheated vapour, moisture is evaporated, and after obtaining qualified product, is delivered to coking by coke oven by discharging spiral conveyor and uses; In this process, by recirculation blower, the part flue gases of cock oven is sent in steam-tube rotatory dryer, with the wet coal that enters inside, contact in the same way, the water vapor that the coal that simultaneously will wet evaporates 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 the 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, by the feeding serew transfer roller, evenly be sent in classifier, 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 the afterbody induced draft fan, enter into the classifier top with flue gases of cock oven, carry out the macrobead sedimentation, satisfactory product enters into the collection filtering system with flue gases of cock oven, still there are a large amount of fine breezes in the coking coal carried out after first classification, fine breeze continues to fall to the classifier bottom along the flow deflector outside, carry out secondary grading, this position arranges the hoop grid distributor, on the hoop grid distributor, airflow hole is set, coking coal moves down along the hoop grid distributor in process, with the secondary flue gases of cock oven after the second booster fan pressurization, fully contact, progressively complete sepn process, a large amount of fine breeze fluidisations is separated, enter into the classifier top with flue gases of cock oven, carry out the sedimentation of secondary macrobead, satisfactory product also enters into the collection filtering system with flue gases of cock oven, carry out coking coal after secondary grading, a large amount of fine breezes are separated, but for guaranteeing good separating effect and adjustment 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 the classifier top with flue gases of cock oven equally, carry out the macrobead sedimentation, satisfactory product enters into the collection filtering system with flue gases of cock oven,
C. collect and filter
Fine breeze after three grades of sortings enters into the 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
Fine breeze through sack cleaner and the discharge of deep bed filter bottom, be assigned to by scraper conveyor in the surge bunker of extruder grain unit, and surge bunker arranges the nitrogen purging protection; After pressing metering, 94 ~ 95% fine breezes are sent in the high speed blender as binding agent in the lump with the coke tar refuse the like waste of metering rear 5 ~ 6%; at 60 ~ 80 ℃, evenly mix; then by the bevel-type feeding machine, undertaken degassed; and be pressed in Squeezinggranulator 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 bottom classifier again, after mixing, send into coking by coke oven in the lump.
Realize the specific equipment of 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 comprised 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 records temperature, the wet coal of water-content for storing through deironing, except foreign matter and on-line analysis;
Constant feeder is by the wet coal Weighing of run coal bin;
Feeding spiral conveyer, its effect is that the wet coal of Weighing is sent into to steam-tube rotatory dryer;
Steam-tube rotatory dryer by feeding spiral conveyer enter material stirred, dry, broken and be classified as the Multifunction drier of one;
The recirculation blower effect is that the part flue gases of cock oven is sent in steam-tube rotatory dryer, with entering inner wet coal, contacts in the same way, and the water vapor that the coal that simultaneously will wet evaporates 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 the dried material of steam-tube rotatory dryer with in company with the air entered;
Its effect of discharging spiral conveyor is the dried material of steam-tube rotatory dryer 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. the sorting classifying unit is comprised 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 the dried coking coal of steam-tube rotatory dryer is delivered to chain mat machine;
The weighing silo effect is by chain mat machine coking coal Weighing;
The feeding serew transfer roller, its effect is evenly to be sent in classifier by weighing silo Weighing coking coal;
The classifier effect is the coking coal that the 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 is entered into to the classifier top with flue gases of cock oven, carries out the macrobead sedimentation, and satisfactory product is entered into to the collection filtering system with flue gases of cock oven;
The second booster fan carries out secondary grading to coking coal, and the fine breeze fluidisation that further will be less than 0.5mm is separated, and satisfactory product enters into the collection filtering system with flue gases of cock oven;
The 3rd booster fan coking coal carries out three classifications, and satisfactory product enters into the collection filtering system with flue gases of cock oven;
3. collecting filtering unit is comprised of deep bed filter, induced draft fan;
The 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 the deep bed filter bottom;
Its effect of induced draft fan is that the flue gas separated from sack cleaner is emptying;
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 the deep bed filter bottom, and flue gases of cock oven is emptying under the effect of induced draft fan after purifying;
4. the extruder grain unit by sack cleaner, by scraper conveyor, surge bunker, high speed blender, bevel-type feeding machine, Squeezinggranulator form;
The sack cleaner effect is the fine breeze that bottom is discharged, and by scraper conveyor, is assigned in the surge bunker of extruder grain unit;
The coke tar refuse the like waste that the high speed blender is used for fine breeze is measured with process after metering, as binding agent, evenly mixes;
The bevel-type feeding machine is for removing high speed blender gas;
Squeezinggranulator, for the fine breeze and the coke tar refuse the like waste that mix 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 carry out dry 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 of the following fine breeze of 0.5mm on coking technique, 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 the 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 the 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 characteristics 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 ℃ ~ 220 ℃ 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 the safeguard protection effect; Can play the desiccation to fine breeze in classifier sorting 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 all is greater than 70 °; On flow deflector and grid distributor, airflow hole is set, assurance fine breeze and macrobead blanking be loose the separation evenly, is convenient to the fluidisation sorting; The fine particle met the demands, under the carrying of flue gases of cock oven, enters deep bed filter by the 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;
4 flue gases of cock ovens and a small amount of nitrogen directly discharged after advancing udst separation; Safety economy, protection of the environment, meet national industrial policies.
The accompanying drawing explanation
Fig. 1 is vapour pipe drying, 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.
The side-view that Fig. 4 is Fig. 3.
Fig. 5 is the deep bed filter schematic diagram that the present invention adopts.
The side-view that Fig. 6 is Fig. 5
Fig. 7 is the Squeezinggranulator schematic diagram that the present invention adopts.
The side-view that Fig. 8 is Fig. 7.
Embodiment
Below in conjunction with accompanying drawing, the invention technical scheme is further described again:
A kind of vapour pipe drying, sorting, granulating integrated coal damping drying means, undertaken by vapour pipe rotary drying, sorting classifying, collection filtration, four essential elements of extruder grain:
A. the vapour pipe rotary drying
The wet coal of run coal bin 1 is through deironing, except after foreign matter and on-line analysis record the parameters such as temperature, water-content, by Weighing 2, quantitatively by feeding spiral conveyer 3, send into the steam-tube rotatory dryer 4(patent No.: 2,004 2 0041963.8, it magnificent chemical machinery and the design of automation design institute), be filled with 0.4 ~ 2.0MPa, temperature in wet coal and steam-tube rotatory dryer 4 lower than superheated vapour or the saturation steam of 300 ℃, after the abundant contact heat-exchanging of tubulation, moisture is evaporated, after obtaining qualified product, be delivered to coking by coke oven by discharging spiral conveyor 14 and use; In this process, by recirculation blower 10, the part flue gases of cock oven is sent in steam-tube rotatory dryer 4, with entering inner wet coal, contact in the same way, the water vapor that the coal that simultaneously will wet evaporates 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 the 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, by feeding serew transfer roller 17, evenly be sent in classifier 18, 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, guarantee that blanking is evenly loose, be convenient to the 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 the macrobead sedimentation, and satisfactory product enters into the collection filtering system with flue gases of cock oven; Still there are a large amount of fine breezes in the coking coal carried out after first classification, along flow deflector 25 outsides, continue to fall to the 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 along grid distributor in process, with after the second booster fan 12 pressurizations, with 48500m
3/ h secondary coke oven flue tolerance fully contacts, progressively complete sepn process, a large amount of fine breeze fluidisations is separated, with flue gases of cock oven, enter into the classifier top, carry out the sedimentation of secondary macrobead, satisfactory product also enters into the collection filtering system with flue gases of cock oven; Carry out coking coal after secondary grading, a large amount of fine breezes are separated, but for guaranteeing good separating effect and adjustment 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 the classifier top with flue gases of cock oven equally, carry out the macrobead sedimentation, satisfactory product enters into the collection filtering system with flue gases of cock oven.One, two, three classification all can be carried out the 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 utilizing; The a large amount of particulate coal of classified rear residue is discharged from classifier 18 bottoms, is delivered to coke oven by rotary conveyor and uses.
C. collect and filter
Fine breeze after three grades of sortings enters into the 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 the 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
Fine breeze through 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, and surge bunker 20 arranges the nitrogen purging protection; Fine breeze is sent in the lump in high speed blender 21 as binding agent with the coke tar refuse the like waste through metering after metering, evenly mix, then by bevel-type feeding machine 22, undertaken degassed, and be pressed in Squeezinggranulator 23 and carry out granulation, obtaining coal particle size is 3 ~ 8mm product, a large amount of coking coal of discharging with classifier 18 bottoms again, after mixing, send into coking by coke oven in the lump; 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 ℃, can reach good granulation effect, and the granular pile density after granulation is about 0.6 ~ 0.8t/m
3, be difficult for the coke oven furnace wall is produced to 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 the dust polluting environment texts.
Claims (3)
1. a vapour pipe drying, sorting, granulating integrated coal moisture control method, its step is divided into:
A. the vapour pipe rotary drying
The wet coal of run coal bin (1) records after temperature-10 ~ 20 ℃, water-content are 11 ~ 16% through deironing, except foreign matter and on-line analysis, by Weighing (2), quantitatively by feeding spiral conveyer (3), send into steam-tube rotatory dryer (4), be filled with saturation steam in wet coal and steam-tube rotatory dryer (4), or after the abundant contact heat-exchanging of the tubulation of superheated vapour, moisture is evaporated, and after obtaining qualified product, is delivered to coking by coke oven by discharging spiral conveyor (14) and uses; In this process, by recirculation blower (10), the part flue gases of cock oven is sent in steam-tube rotatory dryer (4), with the wet coal that enters inside, contact in the same way, the water vapor that the coal that simultaneously will wet evaporates 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), carry out gas solid separation, isolated fine breeze is delivered to the extruder grain unit, and 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, by feeding serew transfer roller (17), evenly be sent in classifier (18), 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 the macrobead sedimentation, satisfactory product enters into the collection filtering system with flue gases of cock oven, still there are a large amount of fine breezes in the coking coal carried out after first classification, along flow deflector (25) outside, continue to fall to classifier (18) bottom, carry out again secondary grading, this position arranges hoop grid distributor (24), the hoop grid distributor arranges airflow hole on (24), coking coal moves down along the interior hoop grid distributor of classifier (18) (24) in process, with the secondary flue gases of cock oven after the second booster fan (12) pressurization, fully contact, 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 the 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 the macrobead sedimentation, satisfactory product enters into the collection filtering system with flue gases of cock oven,
C. collect and filter
Fine breeze after three grades of classifiers (18) sorting enters into the 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
Fine breeze through 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, and surge bunker (20) arranges the nitrogen purging protection; By 94 ~ 95% fine breezes, after metering, with 5 ~ 6% coke tar refuse the like waste through metering, as binding agent, be sent in the lump in high speed blender (21); at 60 ~ 80 ℃, evenly mix; then by bevel-type feeding machine (22), undertaken degassed; 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
3A large amount of coking coal of discharging bottom classifier (18) again, after mixing, send into coking by coke oven in the lump.
2. a kind of vapour pipe drying according to claim 1, sorting, 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 worm conveyor (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 the coal dust homogenizing that further will enter classifier, further the fine powder of 0.5mm is separated and takes out of simultaneously; It is 15 ~ 30m/s that the third stage is sorted into the implication Flow Velocity, the dust that is less than 2mm can be brought into to the settling section of classifier (18), wind speed will be greater than the particles settling of 0.5mm after reducing, be less than the 0.5mm particle and taken out of classifier (18) by flue gases of cock oven, reach the purpose 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 the wet coal Weighing of run coal bin (1);
Feeding spiral conveyer (3), its effect is that the wet coal of Weighing is sent into to steam-tube rotatory dryer (4);
Steam-tube rotatory dryer (4) by feeding spiral conveyer (3) enter material stirred, dry, broken and be classified as the Multifunction drier of one;
Recirculation blower (10) effect is that the part flue gases of cock oven is sent in steam-tube rotatory dryer (4), with entering inner wet coal, contacts in the same way, and the water vapor that the coal that simultaneously will wet evaporates 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 entered;
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 evenly is 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 is entered into to the classifier top with flue gases of cock oven, carries out the macrobead sedimentation, and satisfactory product is entered into to the collection filtering system with flue gases of cock oven;
The second booster fan (12) carries out secondary grading to coking coal, and the fine breeze fluidisation that further will be less than 0.5mm is separated, and satisfactory product enters into the collection filtering system with flue gases of cock oven;
The 3rd booster fan (11) coking coal carries out three classifications, and satisfactory product enters into the 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 the fume emission will separated from sack cleaner;
Sack cleaner (5) effect is the fine breeze that bottom is discharged, and by scraper conveyor (7), is assigned in the surge bunker (20) of extruder grain unit;
High speed blender (21) for using fine breeze through the metering after with through the metering the 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) carries out granulation for the fine breeze using mixing and coke tar refuse the like waste as binding agent, obtains qualified product.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210166019.4A CN103421527B (en) | 2012-05-25 | 2012-05-25 | Steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof |
| JP2013109979A JP6047065B2 (en) | 2012-05-25 | 2013-05-24 | Coal humidity conditioning method with steam tube rotary drying, sorting and granulation integrated, and its dedicated equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210166019.4A CN103421527B (en) | 2012-05-25 | 2012-05-25 | Steam pipe drying, separating, and granulating integrated coal moisture control technology and special equipment thereof |
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| Publication Number | Publication Date |
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| CN103421527A true CN103421527A (en) | 2013-12-04 |
| CN103421527B CN103421527B (en) | 2014-06-18 |
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| CN104017594A (en) * | 2014-06-20 | 2014-09-03 | 中煤能源黑龙江煤化工有限公司 | Low-temperature dry distillation method of coal |
| CN105091548A (en) * | 2014-05-21 | 2015-11-25 | 欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构 | Reinforcing technology for drying melamine crystalline and related device |
| CN110305679A (en) * | 2019-04-12 | 2019-10-08 | 武汉钢铁有限公司 | A kind of coking process for the dry/wet coal mixing that can stablize moisture-free coal treating capacity |
| CN116608675A (en) * | 2023-06-19 | 2023-08-18 | 常州市范群干燥设备有限公司 | Flash evaporation drying equipment |
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| CN104140837A (en) * | 2013-05-10 | 2014-11-12 | 中冶焦耐(大连)工程技术有限公司 | Thermal conduction molded coal moisturizing method with coke oven tail gas as carrying gas, and apparatus thereof |
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| CN105091548A (en) * | 2014-05-21 | 2015-11-25 | 欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构 | Reinforcing technology for drying melamine crystalline and related device |
| CN105091548B (en) * | 2014-05-21 | 2020-02-21 | 欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构 | Enhanced process for drying melamine crystals and related apparatus |
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| CN110305679A (en) * | 2019-04-12 | 2019-10-08 | 武汉钢铁有限公司 | A kind of coking process for the dry/wet coal mixing that can stablize moisture-free coal treating capacity |
| CN116608675A (en) * | 2023-06-19 | 2023-08-18 | 常州市范群干燥设备有限公司 | Flash evaporation drying equipment |
| CN116608675B (en) * | 2023-06-19 | 2023-10-24 | 常州市范群干燥设备有限公司 | Flash evaporation drying equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103421527B (en) | 2014-06-18 |
| JP2013245350A (en) | 2013-12-09 |
| JP6047065B2 (en) | 2016-12-21 |
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