CN105647557A - Device for coking coal stage drying step humidify regulating process - Google Patents
Device for coking coal stage drying step humidify regulating process Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 119
- 238000001035 drying Methods 0.000 title claims abstract description 38
- 238000004939 coking Methods 0.000 title claims abstract description 30
- 230000007363 regulatory process Effects 0.000 title abstract 7
- 238000005243 fluidization Methods 0.000 claims abstract description 76
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims description 75
- 238000013016 damping Methods 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 12
- 238000007791 dehumidification Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 32
- 230000008569 process Effects 0.000 abstract description 25
- 230000033228 biological regulation Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 239000002817 coal dust Substances 0.000 abstract 1
- 239000003546 flue gas Substances 0.000 description 15
- 230000001717 pathogenic effect Effects 0.000 description 14
- 239000012530 fluid Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 238000012546 transfer Methods 0.000 description 8
- 239000000571 coke Substances 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005474 detonation Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a device for a coking coal stage drying step humidify regulating process. The device comprises a first-stage humidify regulating process loop and a second-stage humidify regulating process loop, wherein the first-stage humidify regulating process loop comprises a first-stage fluidization air chamber (19), an air preheater (14) and a first fluidization fan (20), wherein no coiled pipe heating module is arranged in the first-stage fluidization air chamber (19), and a layer of bed materials with the thickness being 500 to 600mm is arranged at the bottom; the second-stage humidify regulating process loop comprises a second-stage fluidization air chamber (6) and a second fluidization fan (10); the second-stage fluidization air chamber (6) mainly consists of a plurality of humidify regulating modules; a coiled pipe heater is arranged in each humidify regulating module. The device has the advantages that the stage drying step humidify regulation is realized through two stages of humidify regulating process loops, so that the device has wide coal humidify applicability; the coal dust generation and elutriation can be orderly controlled; energy can be fed in a step way according to the technological process; the system operation regulation is reliable and flexible; the energy saving performance is high.
Description
Technical field
The present invention relates to coking industry coking technology field, especially relate to a kind of device for coking coal stage drying step humidifying technology.
Background technology
Coal humidifying technology (CMC) refers to " control of coking coal charge moisture " technique, it is to grow up on the basis of coking with dry coal technology, ultimate principle be coal for coking utilizes exterior-heat be thermally dried before shove charge, dehydration, the moisture reaching coal regulates and controls, require moisture in coal to control about 6% according to current coke making process, thus realizing reducing the energy input of process of coking, ensureing that coke oven runs operational stability, improves coke quality or increase the amount of allocating into of weak caking coal, reduce the purpose of coke plant wastewater amount. Meanwhile, the water capacity of shove charge coking coal reduces, and the bulk density of coal strengthens, and improves coke output accordingly.
Along with the development of China's coal conditioning technique, existing multiple coal conditioning technique scheme, mainly include the fluid bed drying scheme etc. drying with the multitube rotary formula that low-pressure steam is heat carrier and being heat carrier with flue gases of cock oven. Through the test of operative practice, existing coal humidifying technology device all also exists some defects, adopts low-pressure steam as heat carrier, it is necessary to vapour source, consumes high-grade energy. Also utilizing flue gases of cock oven as heat carrier, but need high-temperature flue gas long distance delivery, Wind Volume high-temperature blower energy consumption and flue gas heat loss are relatively big, and flue gas flow is limited, and thermal capacity is relatively low, and adjustability is poor. Secondly, domestic numerous independent coal chemical enterprise coke oven thermal source adopts coke-stove gas, and the flue gas moisture of generation is high, and therefore, the airborne wet ability of flue is low, affects damping efficiency. Such scheme except there is energy consumption height, the problem such as regulating power is low, infrastructure investment is big, operating cost is high, control and regulation are complicated and maintenance and repair amount is big. When coal charge moisture content is too high, many coal damping drying devices are affected, and have a strong impact on effect and the efficiency of coal humidifying technology.
Summary of the invention
The present invention is to solve the problem that current coal damping energy consumption is high, regulating power is low, a kind of device for coking coal stage drying step humidifying technology is provided for this, including first paragraph humidifying technology loop and second segment humidifying technology loop, described first paragraph humidifying technology loop includes first paragraph fluidisation air compartment 19, air preheater 14 and first class blower fan 20, without coil heating module in described first paragraph fluidisation air compartment 19, there is the bed that one layer of 500��600mm is thick bottom; Second segment humidifying technology loop includes second segment fluidisation air compartment 6 and the second fluidized air blower 10, and described second segment fluidisation air compartment 6 is made up of some damping modules, is inside provided with coil heating module.
Described first paragraph fluidisation air compartment 19 and second segment fluidisation air compartment 6 are in same fluidized bed type damping machine, the top fluidizing air compartment 19 at first paragraph is additionally provided with charging aperture 1, it is provided with an adjustable overflow plate 12 between first paragraph fluidisation air compartment 19 and second segment fluidisation air compartment 6, controls to enter into the coal charge flow of second segment fluidisation air compartment 6 by adjustable overflow plate; First class blower fan 20 and the second fluidized air blower 10 are all outer to be connected on fluidized bed type damping machine, air preheater 14 is between first class blower fan 20 and fluidized bed type damping machine, air enters from first class blower fan 20, enter, by air preheater 14, the coal charge that first paragraph fluidisation air compartment 19 and charging aperture fall and carry out first time heat convection, coal charge and the dry bed of falling fluidized-bed bottom are conducted heat in fluidisation state, further heat exchange dries dehumidification, enters directly into second segment humidifying technology loop again through adjustable overflow plate 12.
The present invention is for the device of coking coal stage drying step humidifying technology, at the top of fluidized bed type damping machine towards being externally provided with fluidized wind exhaust outlet 17, one system formula fluidized wind aerofluxus relief area, storehouse is arranged at the top in fluidized bed type damping machine, it is mainly reduction fluidising air velocity, form the expansion chamber 3 of dust, for fluidized drying district 4 between second segment fluidisation air compartment 6 and expansion chamber 3, play coal charge fluidized drying Stabilization.
The present invention, for the device of coking coal stage drying step humidifying technology, is additionally provided with reheater 18 in described fluidized wind exhaust outlet 17.
The present invention, for the device of coking coal stage drying step humidifying technology, is equipped with coll(-tube) heater in described air preheater 14, reheater 18 and each damping module.
The present invention is for the device of coking coal stage drying step humidifying technology, and the coll(-tube) heater top arranged in second segment fluidisation air compartment 6 is provided with pulley hook, and pulley hook is connected with fluidized bed type damping machine outside framework; Coll(-tube) heater is mainly made up of light pipe tube bank, and tube bank is staggered in arrangement in level, and in pipe, thermal medium is high-temperature-hot-water.
The present invention is for the device of coking coal stage drying step humidifying technology, and the end of described charging aperture 1 is additionally provided with homocline structure 2, makes coal charge form fluidisation state as early as possible.
The present invention is for the device of coking coal stage drying step humidifying technology, and the bottom of first paragraph fluidisation air compartment 19 and each damping module is provided with cloth wind cabin, and cloth wind cabin is made up of air compartment 8, air distribution plate 7 and cloth blast cap.
The present invention, for the device of coking coal stage drying step humidifying technology, also independently with air compartment in each damping module, is equipped with control valve 9 between the second fluidized air blower 10 and each air compartment, the air quantity of each wind cabin can individually control to adjust. In first paragraph humidifying technology loop, air quantity is controlled by fan frequency conversion speed governing, and pathogenic wind-warm can be controlled by the temperature of the flow of the heating working medium of adjustment air preheater or adjustment heating working medium. In second segment humidifying technology loop, the adjustment valve that air quantity is arranged by air inlet controls, and pathogenic wind-warm is ambient temperature.
The present invention is for the device of coking coal stage drying step humidifying technology, and the side of described second segment fluidisation air compartment is provided with discharging opening 5, and discharging opening 5 place is provided with adjustable discharge baffle, to control the height of fluidized coal beds.
First paragraph fluidisation air compartment has been sequentially connected in series air preheater and the first class blower fan of external, in this first paragraph humidifying technology loop, coal charge heat drying mainly adopts two kinds of heat exchange forms, a kind of is that coal charge hangs down with passing through the feed homocline even structure of the charging aperture setting in first paragraph fluidized wind ceiling portion from top to down, form strong direct-type heat convection with the high-temperature stream wind-transformation risen, the moisture of coal can be taken away rapidly. The coal charge then falling into fluidized-bed bottom carries out another kind of fluidisation state heat transfer, energy rapid draing dehumidification so that coal charge forms fluidisation state, and dehumidification is further dried further with dry bed.
Multiple damping module is had in second segment humidifying technology loop, the heater being made up of coil it is respectively provided with inside it, second segment fluidisation air compartment has concatenated the second fluidized air blower, in this second segment humidifying technology loop, multiple damping modules are carried out air feed in parallel by the second fluidized air blower, but each damping module can also the hot water flow of independent regulation air quantity and coll(-tube) heater and temperature, form the damping temperature of single irradiation modules and the process loops of the adjustable step damping of fluidising air velocity. Along with dry carrying out, coal charge progressively dries, the tube pitch of the coil tube bank in each irradiation modules is also progressively pulled open, the heat put into also reduces accordingly, fluidising air velocity is also gradually reduced, its Main Function is the elutriation controlling coal charge temperature and dust, it is ensured that the safety of fluid bed and the response rate of dust.
Being connected by adjustable overflow plate between first paragraph humidifying technology loop and second segment humidifying technology loop, Main Function is to fluidize, at first paragraph, the bed layer forming certain altitude in air compartment. First paragraph coal humidifying technology loop coal charge out, enters directly into second segment humidifying technology loop by adjustable overflow plate, and coal charge flow process is that crossfire is arranged.
Coll(-tube) heater in the present invention and air preheater, all with saturated hot-water be coll(-tube) heater heat carrier, with air for fluid bed fluidizing agent. The main heating source of saturated hot-water heat source is from flue gases of cock oven waste heat. When wet moisture content of coal is too high, during the more difficult fluidized drying dehydration of coal charge in fluid-bed drier, first paragraph humidifying technology loop available air preheater is by more than fluidization air heating temperatures to 90 DEG C, fluidized wind gentleness Fluidization wind rate in first paragraph humidifying technology loop is improved, increase the volume fluidising air velocity in fluid bed, make high-moisture coal charge and hot blast produce strong heat convection, moisture in fast eliminating coal charge, then form fluidisation fluidisation state with the bed material in bed and dry. And improve fluidized wind pathogenic wind-warm by air preheater, improve the wet ability of fluidisation wind load.
Adopting the heat transfer medium high-temperature-hot-water of high specific heat as the dry damping of wet coal and fluid bed fluidizing agent heat source, air is as fluidizing agent. Compared with the Technology directly participating in coal damping with heat smoke, technological process institute calorific requirement is only 20% without internal heater, and the fluidized gas scale of construction also ratio adopts flue gas to make fluidizing agent few about 20%��30%. Fluidising air velocity in first paragraph fluidized-bed process loop is generally 1.1��1.6m/s, and pathogenic wind-warm can bring up to more than 100 DEG C depending on coal charge humidity, can control the safety of coal charge detonation at high operating temperatures; The fluidizing velocity in second segment fluidized-bed process loop is adjustable in 0.5��1.3m/s, and pathogenic wind-warm is adjustable in 50 DEG C��80 DEG C; Thermal source adopts pressure 0.4��0.6MPa, and temperature is the saturated hot-water of 120 DEG C��160 DEG C;The dry step humidifying technology device of two-period form has higher load regulation range and high humility coal adaptability.
In second segment humidifying technology loop, along with technological process coal charge moisture removes gradually, reduce along the wind speed in the irradiation modules of flow process and pathogenic wind-warm step, can ensure that coal charge outlet temperature is maintained between 30 DEG C��40 DEG C, fluidized wind wind speed also significantly reduces simultaneously, the coal charge dried is made to be in low temperature state, it is possible to the danger of the coal Volatile detonation being effectively prevented from coal humidifying technology flow process; Low fluidizing velocity can prevent the tube bank of built-in coll(-tube) heater and coal abrasion of wetting, and simultaneously low temperature low speed humidifying technology can be effectively prevented coal charge and gets damp and the elutriation of dust.
The damping ability of the present invention is adjusted to 6% situation from wet moisture content of coal content 14.0%, thermal source is provided by flue gases of cock oven waste heat, when wet moisture content of coal content is more than 14%, the air preheater that can pass through first paragraph fluid technology loop adjusts fluidized wind pathogenic wind-warm and fluidising air velocity, strengthens its heat convection effect and fluidisation heat transfer efficiency.
The invention has the beneficial effects as follows:
1, frame structure is adopted, the dry damping module of air preheater, fluidized bed type is modular combination, ensure that the installation and repairing of process unit is convenient, and can according to the multiple modularity of production requirement, it is also possible to the process unit system that combination in any is big, only need a standby backup module can ensure the normal production of humidity controlling system, reduce the scale of the stand-by equipment of existing humidity controlling system, equipment compatibility is good, it is simple to maintenance, reliable;
2, the technological process of stage drying step damping is adopted so that device, to coal charge humidity wide adaptability, can control coal charge dust in order and produce and elutriation, and energy puts into according to technological process step, and system runing adjustment is reliable, flexible, and energy saving is strong;
3, with thermal conduction study and hydrodynamics Basic Mechanism, the heating working medium of damping machine is respectively adopted two kinds of working medium with fluid bed fluidisation working medium, heat-carrying in technological process, load are wet, fluidizing agent separates, it is easy to the energy transmission of system, runing adjustment is flexible, one is to improve damping machine institute calorific requirement conversion effective capacity, and two is to ensure fluidizing agent flow stability and the wet ability of its load;
4. adopting built-in coll(-tube) heater, thermal source adaptability is wider, can multi-heat source coupling, flexibly, strong adaptability, adapt to the dry dehumidification of more than 20% high humility coal charge;
5, stagewise dries and adopts different heat exchange modes, and the adaptability of coal charge is higher, and heat puts into also more reasonable, reaches the energy balance and material balance;
6, using air as fluidizing agent, simply play coal charge fluidization and the wet function of load, compared with flue gas direct contact type fluid bed moisture control method, the fluidized gas scale of construction is only about the 25% of flue tolerance; The electrical power of fluidized air blower can be reduced, the electric energy of 40��50% can be saved;
7, adopting low temperature low velocity fluidization drying means, dust generation rate controls within 4%, and reclaims pelletize by dedusting, and dust emission concentration is 8.9mg/Nm3, meets minimum discharge;
8, the material in damping machine is in low-temperature heat, mean temperature is 50 DEG C��85 DEG C, low fluidizing velocity is the fluidisation augmentation of heat transfer state of 0.5��1.0m/s, improve the heat exchange efficiency of fluidised coal charge and built-in coll(-tube) heater, the radiation loss of conveying hot-water line is the 4.65% of the radiation loss of conveying flue gas, from the viewpoint of infrastructure investment and operating cost etc., the heat transfer efficiency of hot water and heat-carrying capacity are far superior to flue gas.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the schematic diagram of the present invention.
Detailed description of the invention
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, all can by other equivalences or there is the alternative features of similar purpose replaced. That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
The device for coking coal stage drying step humidifying technology as shown in Figure 1, including first paragraph humidifying technology loop and second segment humidifying technology loop, described first paragraph humidifying technology loop includes first paragraph fluidisation air compartment 19, air preheater 14 and first class blower fan 20, without damping module in described first paragraph fluidisation air compartment 19, there is dry coal charge thick for one layer of 500��600mm bottom as bed; Second segment humidifying technology loop includes second segment fluidisation air compartment 6 and the second fluidized air blower 10, described second segment fluidisation air compartment 6 is made up of some damping modules, it is equipped with coll(-tube) heater in described air preheater 14 and each damping module, coll(-tube) heater is mainly made up of light pipe tube bank, tube bank is staggered in arrangement in level, and in pipe, thermal medium is high-temperature-hot-water. Described first paragraph fluidisation air compartment 19 and second segment fluidisation air compartment 6 are in same fluidized bed type damping machine, and pulley hook is connected with fluidized bed type damping machine outside framework. The top fluidizing air compartment 19 at first paragraph is additionally provided with charging aperture 1, and the end of charging aperture 1 is additionally provided with the homocline structure 2 making coal charge form fluidisation state as early as possible. It is provided with an adjustable overflow plate 12 between first paragraph fluidisation air compartment 19 and second segment fluidisation air compartment 6, can control to enter into the coal charge flow of second segment fluidisation air compartment 6 by adjustable overflow plate; First class blower fan 20 and the second fluidized air blower 10 are all outer to be connected on fluidized bed type damping machine, air preheater 14 is between first class blower fan 20 and fluidized bed type damping machine, air enters from first class blower fan 20, enter, by air preheater 14, the coal charge that first paragraph fluidisation air compartment 19 and charging aperture fall and carry out first time heat convection, coal charge and the dry bed of falling fluidized-bed bottom are conducted heat in fluidisation state, and dehumidification is further dried.
At the top of fluidized bed type damping machine towards being externally provided with fluidized wind exhaust outlet 17, described fluidized wind exhaust outlet 17 is additionally provided with reheater 18, reheater 18 is provided with coll(-tube) heater. One system formula fluidized wind aerofluxus relief area, storehouse is arranged at the top in fluidized bed type damping machine, is mainly reduction fluidising air velocity, forms the expansion chamber 3 of dust, for fluidized drying district 4 between second segment fluidisation air compartment 6 and expansion chamber 3, plays coal charge fluidized drying Stabilization. The side of described second segment fluidisation air compartment is provided with discharging opening 5, and discharging opening 5 place is provided with adjustable discharge baffle, to control the height of fluidized coal beds.
The bottom of first paragraph fluidisation air compartment 19 and each damping module is provided with cloth wind cabin, and cloth wind cabin is made up of air compartment 8, air distribution plate 7 and cloth blast cap. Also independently with cloth wind cabin in each damping module, being equipped with control valve 9 between the second fluidized air blower 10 and each cloth wind cabin, the air quantity of each wind cabin can individually control to adjust. In first paragraph humidifying technology loop, air quantity is controlled by fan frequency conversion speed governing, and pathogenic wind-warm can be controlled by the temperature of the flow of the heating working medium of adjustment air preheater or adjustment heating working medium.In second segment humidifying technology loop, the adjustment valve that air quantity is arranged by air inlet controls, and pathogenic wind-warm is ambient temperature.
First paragraph fluidisation air compartment has been sequentially connected in series air preheater and the first class blower fan of external, in this first paragraph humidifying technology loop, coal charge heat drying mainly adopts two kinds of heat exchange forms, a kind of is that coal charge hangs down with passing through the feed homocline even structure of the charging aperture setting in first paragraph fluidized wind ceiling portion from top to down, form strong direct-type heat convection with the high-temperature stream wind-transformation risen, the moisture of coal can be taken away rapidly. The coal charge then falling into fluidized-bed bottom carries out another kind of fluidisation state heat transfer, energy rapid draing dehumidification so that coal charge forms fluidisation state, and dehumidification is further dried further with dry bed.
Multiple damping module is had in second segment humidifying technology loop, the coll(-tube) heater being made up of coil it is respectively provided with inside it, second segment fluidisation air compartment has concatenated the second fluidized air blower, in this second segment humidifying technology loop, multiple damping modules are carried out air feed in parallel by the second fluidized air blower, but each damping module can also the hot water flow of independent regulation air quantity and coll(-tube) heater and temperature, form the damping temperature of single irradiation modules and the process loops of the adjustable step damping of fluidising air velocity. Along with dry carrying out, coal charge progressively dries, the tube pitch of the coil tube bank in each irradiation modules is also progressively pulled open, the heat put into also reduces accordingly, fluidising air velocity is also gradually reduced, its Main Function is the elutriation controlling coal charge temperature and dust, it is ensured that the safety of fluid bed and the response rate of dust.
Being connected by adjustable overflow plate between first paragraph humidifying technology loop and second segment humidifying technology loop, Main Function is to fluidize, at first paragraph, the bed layer forming certain altitude in air compartment. First paragraph coal humidifying technology loop coal charge out, enters directly into second segment humidifying technology loop by adjustable overflow plate, and coal charge flow process is that crossfire is arranged.
Coll(-tube) heater in the present invention and air preheater, all with saturated hot-water be coll(-tube) heater heat carrier, with air for fluid bed fluidizing agent. The main heating source of saturated hot-water heat source is from flue gases of cock oven waste heat. When wet moisture content of coal is too high, during the more difficult fluidized drying dehydration of coal charge in fluid-bed drier, first paragraph humidifying technology loop available air preheater is by more than fluidization air heating temperatures to 90 DEG C, fluidized wind gentleness Fluidization wind rate in first paragraph humidifying technology loop is improved, increase the volume fluidising air velocity in fluid bed, make high-moisture coal charge and hot blast produce strong heat convection, moisture in fast eliminating coal charge, then form fluidisation fluidisation state with the bed material in bed and dry. And improve fluidized wind pathogenic wind-warm by air preheater, improve the wet ability of fluidisation wind load.
Heat transfer medium adopts the high-temperature-hot-water of high specific heat as the dry damping of wet coal and fluid bed fluidizing agent heat source, and air is as fluidizing agent. Compared with the Technology directly participating in coal damping with heat smoke, technological process institute calorific requirement is only 20% without internal heater, and the fluidized gas scale of construction also ratio adopts flue gas to make fluidizing agent few about 20%��30%. Fluidising air velocity in first paragraph fluidized-bed process loop is generally 1.1��1.6m/s, and pathogenic wind-warm can bring up to more than 100 DEG C depending on coal charge humidity, can control the safety of coal charge detonation at high operating temperatures; The fluidizing velocity in second segment fluidized-bed process loop is adjustable in 0.5��1.3m/s, and pathogenic wind-warm is adjustable in 50 DEG C��80 DEG C;Thermal source adopts pressure 0.4��0.6MPa, and temperature is the saturated hot-water of 120 DEG C��160 DEG C; The dry step humidifying technology device of two-period form has higher load regulation range and high humility coal adaptability.
In second segment humidifying technology loop, along with technological process coal charge moisture removes gradually, reduce along the wind speed in the irradiation modules of flow process and pathogenic wind-warm step, can ensure that coal charge temperature is maintained between 30 DEG C��40 DEG C, fluidized wind wind speed also significantly reduces simultaneously, the coal charge dried is made to be in low temperature state, it is possible to the danger of the coal Volatile detonation being effectively prevented from coal humidifying technology flow process; Low fluidizing velocity can prevent the tube bank of built-in coll(-tube) heater and coal abrasion of wetting, and simultaneously low temperature low speed humidifying technology can be effectively prevented coal charge and gets damp and the elutriation of dust.
The damping ability of the present invention is adjusted to 6% situation from wet moisture content of coal content 14.0%, thermal source is provided by flue gases of cock oven waste heat, when wet moisture content of coal content is more than 14%, the air preheater that can pass through first paragraph fluid technology loop adjusts fluidized wind pathogenic wind-warm and fluidising air velocity, strengthens its heat convection effect and fluidisation heat transfer efficiency.
The invention is not limited in aforesaid detailed description of the invention. The present invention expands to any new feature disclosed in this manual or any new combination, and the step of the arbitrary new method disclosed or process or any new combination.
Claims (9)
1. the device for coking coal stage drying step humidifying technology, it is characterized in that: include first paragraph humidifying technology loop and second segment humidifying technology loop, described first paragraph humidifying technology loop includes first paragraph fluidisation air compartment (19), air preheater (14) and first class blower fan (20), without coil heating module in described first paragraph fluidisation air compartment (19), there is one layer of bed bottom, second segment humidifying technology loop includes second segment fluidisation air compartment (6) and the second fluidized air blower (10), and described second segment fluidisation air compartment (6) is mainly made up of some damping modules, is provided with coll(-tube) heater in damping module, described first paragraph fluidisation air compartment (19) and second segment fluidisation air compartment (6) are in same fluidized bed type damping machine, the top fluidizing air compartment (19) at first paragraph is additionally provided with charging aperture (1), being provided with an adjustable overflow plate (12) between first paragraph fluidisation air compartment (19) and second segment fluidisation air compartment (6), adjustable overflow plate (12) regulates the bed thickness in first paragraph fluidisation air compartment (19) between 500��600mm, first class blower fan (20) and the second fluidized air blower (10) are all outer to be connected on fluidized bed type damping machine, air preheater (14) is positioned between first class blower fan (20) and fluidized bed type damping machine, air enters from first class blower fan (20), the coal charge fallen by air preheater (14) entrance first paragraph fluidisation air compartment (19) and charging aperture carries out first time heat convection, coal charge and the dry bed of falling fluidized-bed bottom are conducted heat in fluidisation state, further heat exchange dries dehumidification, second segment humidifying technology loop is entered directly into again through adjustable overflow plate (12).
2. the device for coking coal stage drying step humidifying technology according to claim 1, it is characterized in that: at the top of fluidized bed type damping machine towards being externally provided with fluidized wind exhaust outlet (17), one system formula fluidized wind aerofluxus relief area, storehouse is arranged at the top in fluidized bed type damping machine, it is mainly reduction fluidising air velocity, form the expansion chamber (3) of dust, for fluidized drying district (4) between second segment fluidisation air compartment (6) and expansion chamber (3).
3. the device for coking coal stage drying step humidifying technology according to claim 2, is characterized in that: be additionally provided with reheater (18) in described fluidized wind exhaust outlet (17).
4. the device for coking coal stage drying step humidifying technology according to claim 3, is characterized in that: described air preheater (14) and be equipped with coll(-tube) heater in reheater (18).
5. the device for coking coal stage drying step humidifying technology according to claim 4, it is characterized in that: the coll(-tube) heater top arranged in second segment fluidisation air compartment (6) is provided with pulley hook, and pulley hook is connected with fluidized bed type damping machine outside framework; Coll(-tube) heater is mainly made up of light pipe tube bank, and tube bank is staggered in arrangement in level, and in pipe, thermal medium is high-temperature-hot-water.
6. the device for coking coal stage drying step humidifying technology according to claim 1, is characterized in that: the end of described charging aperture (1) is additionally provided with homocline structure (2).
7. the device for coking coal stage drying step humidifying technology according to claim 1, it is characterized in that: the bottom of first paragraph fluidisation air compartment (19) and each damping module is provided with cloth wind cabin, and cloth wind cabin is made up of air compartment (8), air distribution plate (7) and cloth blast cap.
8. the device for coking coal stage drying step humidifying technology according to claim 7, it is characterized in that: also independent of cloth wind cabin in each damping module, between the second fluidized air blower (10) and each cloth wind cabin, be equipped with control valve (9).
9. the device for coking coal stage drying step humidifying technology according to claim 1, it is characterized in that: the side of described second segment fluidisation air compartment is provided with discharging opening (5), discharging opening (5) place is provided with adjustable discharge baffle, to control the height of fluidized coal beds.
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| CN201610149034.6A CN105647557B (en) | 2016-03-16 | 2016-03-16 | Device for coking coal stage drying step humidifying technology |
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| CN201610149034.6A CN105647557B (en) | 2016-03-16 | 2016-03-16 | Device for coking coal stage drying step humidifying technology |
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| CN105647557B CN105647557B (en) | 2019-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110903839A (en) * | 2018-09-17 | 2020-03-24 | 宝山钢铁股份有限公司 | Device and method for controlling moisture of coal entering furnace by using flue gas waste heat |
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| JPH11263981A (en) * | 1998-03-16 | 1999-09-28 | Nippon Steel Corp | Drying and classifying device for raw material coal for coke oven |
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| CN104726121A (en) * | 2015-03-20 | 2015-06-24 | 无锡亿恩科技股份有限公司 | Device for high-humidity charging coking coal humidifying technology |
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- 2016-03-16 CN CN201610149034.6A patent/CN105647557B/en not_active Expired - Fee Related
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| JPH11263981A (en) * | 1998-03-16 | 1999-09-28 | Nippon Steel Corp | Drying and classifying device for raw material coal for coke oven |
| CN102585867A (en) * | 2012-03-08 | 2012-07-18 | 无锡亿恩科技股份有限公司 | System for conditioning through coking charge coal humidity difference |
| CN103058490A (en) * | 2013-01-18 | 2013-04-24 | 哈尔滨工业大学 | Multi-stage inner circulating fluidized bed sludge drying and fluidized bed incinerating device and method |
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| CN110903839A (en) * | 2018-09-17 | 2020-03-24 | 宝山钢铁股份有限公司 | Device and method for controlling moisture of coal entering furnace by using flue gas waste heat |
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| CN105647557B (en) | 2019-03-19 |
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