CN105063273B - A kind of flue gas low energy consumption semidry method dust pelletizing system of converter - Google Patents
A kind of flue gas low energy consumption semidry method dust pelletizing system of converter Download PDFInfo
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- CN105063273B CN105063273B CN201510554692.9A CN201510554692A CN105063273B CN 105063273 B CN105063273 B CN 105063273B CN 201510554692 A CN201510554692 A CN 201510554692A CN 105063273 B CN105063273 B CN 105063273B
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Abstract
The present invention relates to a kind of flue gas low energy consumption semidry method dust pelletizing system of converter.Including the devaporizer being connected by Non-Metallic Expansion Joints with gasification cooling flue, liquid film type wet cooling tower and the adjustable circumferential weld washing dehydration demisting integrated tower being connected with fans entrance pipe network, the lower end of the devaporizer is connected with the bending tubes end of banana bend pipe, the smoke end of the banana bend pipe is inscribed in liquid film type wet cooling tower lower end, liquid film type wet cooling tower upper end outer wall is cased with liquid film generation trough, liquid film type wet cooling tower upper end is provided with uptake flue, the port of export of uptake flue is connected by connecting the upper end of flue gas mozzle of the flue with being built in adjustable circumferential weld washing dehydration demisting integrated tower.The higher dust emission standard of converter gas purification recovery system or requirement are disclosure satisfy that, lifts the quality of gas recovery, cooling dust-water treatment amount is reduced, reduces energy consumption, improve reliability, the security of system operation.
Description
Technical field
The present invention relates to a kind of dust pelletizing system, more particularly to a kind of flue gas low energy consumption semidry method dust pelletizing system of converter,
Belong to prevention and control of air pollution and flue gas cooling and dedusting technical field.
Background technology
Environmental issue turns into a key factor for restricting China's steel and iron industry sustained and coordinated development.October 1 in 2012
Day acts what is implemented《Steel and iron industry great Qi wu dye thing discharge marks Huaihe River》(GB28664-2012), steel-making enterprise is defined stricter
Big gas wu dyes thing emission control requirement and start in limit value, on January 1st, 2015, no matter newly-built or existing enterprise, it is discharged
Concentration must all reach below 50mg/m3, and on 2 27th, 2013, country determined that the industries such as steel, cement start in different periods
Perform the special emission limit of atmosphere pollution；According to the trend that Environmental quality requirement is more and more strict, current more city
Enterprise's internal control smoke dust discharge concentration is scheduled on below 30mg/Nm3 by city and enterprise.Most tight new environmental law is from 2015 in China's history
On January 1, in is had begun to implement, and followed by, various regions will be put into effect successively according to a variety of refinement policies that new environmental law is worked out.
Current environmentally friendly pollution treatment is in the critical period for solving the problems, such as the old and new, as one of important pollution sources of iron and steel enterprise
Pneumatic steelmaking link, the discharge of flue gas particles of converter is the dye thing thing exhausting control source being especially included in national standard.
How enterprise selects suitable handling process, realize the efficiency liter of converter gas purification and recovery process technology according to actual conditions
Level, it has also become the focus and focus of iron and steel enterprise's modern converter steel-making energy-saving and emission-reduction.
Pneumatic steelmaking is smelted using oxygen blast, and in converting process, its exhaust gas volumn, exhaust gas components and flue-gas temperature are with smelting rank
Section is in cyclically-varying.A large amount of flue gases and dust, particularly the flue gas CO in blowing mid-term can be produced in converting process simultaneously
Concentration is up to more than 80%, and when CO contents are 60% or so, its calorific value is up to 8000KJ/Nm3.And containing substantial amounts of in dust
Fe, FeO, Fe2O3 etc., total amount are generally 10~20kg/t steel.It can be seen that the CO contents in converter gas are very high, the iron in dust
Content is also very high, there is very high recovery value.Converter its particle diameter when furnace gas is unburned is largely more than 10 μm, furnace gas combustion
Then most of after burning is less than 1 μm, and relative trapping difficulty is big.
Converter current (flue gas) gas purification mainly has complete wet OG methods, semidry method with recovery system gas cleaning mode
The form such as (dry and wet combination) and dry method LT methods, wet method saturator text gas purification and the recovery system of transplanting are introduced and digested in recent years
System is new OG technologies, mainly improves two literary aditus laryngis, and R--D, PA class Venturi tube are changed into the adjustable annular gap scrubber of heavy mound type,
Cancel-text simultaneously, instead saturation cooling tower, its technology maturation, process equipment is simple, easy to operate, particularly technology controlling and process
Aspect, it is automatically or manually controlled all very safe and reliable.But its shortcoming is it is also obvious that the new OG wet method systems resistance generally split is damaged still
It is high:Blower press generally reaches 22KPa--24 KPa in actual use；
System water amount is big, and supporting water treatment facilities are huge；Maintenance of equipment amount is big, and operating cost is high.
The semidry method of the devaporizer picked in recent years+circular seam type adjustable throat inlet Venturi combination, cooled down using evaporation
Device carries out tentatively cooling and dedusting to flue gas, receives to obtain the thick dry dirt in part, flue gas is finally cooled down using annular gap scrubber
And refined dedusting.In terms of the situation of application, the technique, which has, receives to obtain part dry ash, improvement de-dusting cycle water water quality, reduces recirculated water
The advantages that amount.But existing semi-dry process goes out that dry ash ratio is few, the cinder that its devaporizer is collected accounts for always containing in flue gas
40% or so of dust quantity, and devaporizer outlet dust content is still up to 60-100g/Nm3, circular seam type adjustable throat inlet Venturi
Entrance flue gas temperature is unsaturated state at 150-280 DEG C, under this operating mode, to reach system dust removing desired value, ensures two
The aggregation efficiency of text, need to consume can more be situated between, also because entrance flue gas temperature is high, increase foulant crystallization precipitation rate.In order to
Solve the problems, such as that two literary inlet flue gas dust contents are high, temperature is high, prior art be the preposition multigroup washing units of two texts or its
Its dust removing units, but its technological process is long, space-consuming is big, bend is more, resistance damage is big, water consumption is greatly and by mill construction, space
Limited；
Generally existing semi-dry process system control requires high, fault rate height；The viscous ash of wet wall, ash discharge in devaporizer
Mouth is easily stifled cold；
Costs and poor dehydration results after usual existing semidry method system wet portion annular gap scrubber, flue gas free water content
Height, the free water smokes of a large amount of washing drops and flushing water droplet formation using soot dust granule thing as the nuclei of condensation, defeated with flue gas in flue gas
Go out to diffuse, form that SR is high, but efficiency of dust collection is difficult to the chronic disease that improves.
The content of the invention
For drawbacks described above, it is an object of the invention to provide a kind of flue gas low energy consumption semidry method dedusting system of converter
System, is combined by devaporizer with liquid film type wet cooling tower, divides two-stage evaporative cooling, it is shallow that dry and wet ash discharge combination flue gas does section
Layer level of sedimentation path length, improves dry ash recovery rate；Using liquid film type wet cooling tower flue gas cyclone technique, improve 300 DEG C with
The evaporation cooldown rate and efficiency of dust collection of lower flue gas flue gas, solve low-temperature space and the serious technology hardly possible of wall is glued using evaporation cooled dust
Topic, adjustable circumferential weld weight washer entrance is imported more pre-atomized water smokes, improve comprehensively in adjustable circumferential weld weight washer
Reach low-resistance, low energy consumption operation while the cohesion arresting efficiency of fine particle；Using adjustable circumferential weld washing dehydration demisting one
Body technology, improve the modularization of coal gas dust removal of converter cleaning system and integrated level, dehydration of the strengthening system to water mists
The ability of demisting, depth cleaning discharged gas fume, effectively improve cooling, dedusting, dewatering system each component units classification efficiency,
So as to improve total efficiency of dust collection of dust pelletizing system, disclosure satisfy that the higher dust emission standard of converter gas purification recovery system or
It is required that lifting the quality of gas recovery, cooling dust-water treatment amount is reduced, reduces energy consumption, improve reliability, the peace of system operation
Quan Xing.
It is for this technical solution adopted in the present invention：
Devaporizer, liquid film type including being connected by Non-Metallic Expansion Joints with gasification cooling flue evaporate cooling
Tower and the adjustable circumferential weld washing dehydration demisting integrated tower being connected with fans entrance pipe network, lower end and the perfume of the devaporizer
The bending tubes end connection of any of several broadleaf plants bend pipe, the smoke end of the banana bend pipe are inscribed in liquid film type wet cooling tower lower end, and liquid film type steams
Hair cooling tower upper end outer wall is cased with liquid film generation trough, and liquid film type wet cooling tower upper end is provided with uptake flue, and uptake flue goes out
Mouth end is connected by connecting the upper end of flue gas mozzle of the flue with being built in adjustable circumferential weld washing dehydration demisting integrated tower；
Some prescriptions are distributed with the gasification cooling flue inner wall at end to downward two-fluid aerosol spray gun I；
The crook lower end of the banana bend pipe is provided with belly cinder conveyer, and the output end of the belly cinder conveyer is connected with row
Grey pipeline, the end connection collection ash silo of the removing ash pipeline.
Annular space between the liquid film type wet cooling tower inwall lower end and the smoke end outer wall of banana bend pipe is formed
Collecting tank, the smoke end overcentre of banana bend pipe are provided with dry and wet interface umbrella hood, the lower edge of dry and wet interface umbrella hood
Diameter is more than the smoke end diameter of banana bend pipe, and the overcentre of dry and wet interface umbrella hood is provided with the flushing spray being directed downward
Rifle, rinse above spray gun and be provided with the two-fluid aerosol spray gun II of direction upward；
It is provided with the adjustable circumferential weld washing dehydration demisting integrated tower under adjustable circumferential weld weight washer and flue gas mozzle
End connection, the shell of adjustable circumferential weld weight washer and the outer wall of flue gas mozzle and adjustable circumferential weld washing dehydration demisting integrated tower
If the annular space that surrounds of inwall in be provided with the export-oriented dedusting dehydration spiral board of dried layer positioned at flue gas mozzle bottom, it is described
If the top of export-oriented dedusting dehydration spiral board is provided with the export-oriented dehydrating demisting spiral board of dried layer in the middle part of flue gas mozzle
I, upper end is provided with the downward some stressor layer water fog spraying guns in direction, the export-oriented dedusting dehydration eddy flow in the flue gas mozzle
The upper and lower ends of plate are respectively equipped with normally opened water fog spraying gun, and the normally opened water fog spraying gun is dehydrated spiral board towards export-oriented dedusting；
The side wall lower ends of the liquid film type wet cooling tower are connected provided with drainpipe with self-cleaning water lute drainer, it is described can
The side wall lower ends of circular seam washing dehydrating demisting integrated tower are adjusted to be connected provided with buck comb with self-cleaning water lute drainer, self-cleaning water
Envelope water trap is connected by blow-off pipe with overhead chute.
Further, the smoke end of the banana bend pipe includes conical pipe and pipe, and the pipe is arranged on the upper of conical pipe
End, the lower edge diameter of dry and wet interface umbrella hood are more than pipe diameter.
Further, water tooth weir is provided with the liquid film generation trough, the side wall of the liquid film generation trough is provided with feed pipe.
Further, the tangent connection of outer wall circumference of the arrival end and uptake flue of the connection flue, the uptake flue
Upper end be provided with explosion venting valve.
Further, if being provided with the export-oriented dehydrating demisting spiral board of dried layer in the adjustable circumferential weld washing dehydration demisting integrated tower
II, if the export-oriented dehydrating demisting spiral board II of the dried layer is located at the top of flue gas mozzle, the export-oriented dehydrating demisting rotation
The two-fluid aerosol spray gun III of direction upward is provided between flowing plate II and flue gas mozzle.
Further, the adjustable circumferential weld weight washer is watched including adjustable annular gap scrubber body, scalable heavily cutting, hydraulic pressure
Take mechanism and guide rod.
Further, the side wall of the banana bend pipe is provided with wall ash vibrator.
Further, the side wall of the adjustable circumferential weld washing dehydration demisting integrated tower lower end is provided with inspection manhole.
Further, the upper end of the removing ash pipeline is provided with unloading valve.
It is an advantage of the invention that：
1）The present invention under high temperature and frequently changing condition, is suitable for vaporizing by using Non-Metallic Expansion Joints
The horizontal and vertical displacement of cooling stack, have pressure release effect concurrently, it is not necessary to any medium and maintenance, compared to usual OG overflow water
Envelope operation is safer, reliable and economical.
2）Devaporizer of the invention by preposition dry-running, the front end of devaporizer use double-current spray gun body,
Cooled flue gas after being made water fogging with high steam or nitrogen, coarse grained dust are reunited sedimentation in the presence of water smoke, sedimentation
Coarse powder dirt is transported to cinder feed bin by cinder induction system, using evaporation cooling high-temperature flue gas, improves high-temperature flue gas water smoke
Evaporate cooldown rate, the heat exchange amount of identical injection flow rate is 10 times of traditional OG wet methods, only this-step water consumption than usual Whote-wet method
OG water consumptions few 85%, water consumption and the dry method of cooled flue gas approach.
3）The present invention passes through the devaporizer cinder induction system devaporizer bottom of preposition dry-running and banana
Bend pipe horizontal channel and the upward outlet of banana bend pipe form U-shaped coarse granule sedimentation passage, and its flue gas does section horizontal route length, shallow
Layer setting condition is good, simultaneously as the conduction of liquid film generation trough inward eddy makes flue gas in the upward outlet of banana bend pipe
Generation eddy flow, the thinner dust for failing to realize gravitational settling Accelerated subsidence under cyclonic action, so as to reach more than 50%
Dust is collected in the form of dry ash, and the semidry process improves 25% compared to usual wet cooling tower dry ash recovery rate；Substantially improve
De-dusting cycle water water quality, it can at least reduce water treatment system processing water 50%；
4）The present invention uses liquid film type wet cooling tower, solves less than 300 DEG C flue gases and glues wall using evaporation cooled dust
Serious technical barrier, liquid film occurs trough inner water tooth weir liquid film type wet cooling tower inwall and produces uniform wall flowing water film, in cigarette
Autogenous cutting is to producing eddy flow under outlet suction function in liquid film type wet cooling tower, flue gas eddy flow in liquid film type wet cooling tower, and one
Aspect makes water mists caused by double-current spray gun body be sufficiently mixed with flue gas, accelerates heat transfer cooling procedure, improves less than 300 DEG C cigarettes
The evaporation cooldown rate and efficiency of gas；Separately-aspect, flue gas eddy flow in liquid film type wet cooling tower, the disturbance of flue gas is added,
Make elastic collision mutually occurs between grit, droplet, accelerate the cohesion of grit moistening and the wall that becomes flows down with wall and lets out or settle, enter-walk to carry
The grade dust-collection efficiency of high liquid film type wet cooling tower, annular gap scrubber inlet flue gas dust content is greatly lowered.
5）The present invention is before adjustable annular gap scrubber entrance, by using two-fluid (aqueous vapor) in liquid film type wet cooling tower
Spray gun evaporates cooled flue gas and uses flue gas cyclone technique, makes a large amount of well-mixed water smokes under blower negative pressure effect with ring
Water smoke caused by seam washer precondition pressure water fog spraying gun is imported in annular gap scrubber in the lump ,-aspect liquid film type wet cooling tower
It is interior to use evaporation cooling to obtain lower flue-gas temperature before making annular gap scrubber, another-aspect, annular gap scrubber can be entered
Mouth imports more pre-atomized sprayings.Because the pressure of circumferential weld entrance wet gas is smaller, the wet coal of saturation in annular gap scrubber
Influence of the temperature or partial pressure of water vapor of gas to water capacity is very big, and temperature is lower, and aqueous vapor partial pressure is smaller, and water capacity is smaller, contains
Moisture number directly influence total saturation wet gas amount, further influence circumferential weld component resistance, pre-atomized spraying plus
Enter to improve the cohesion arresting efficiency of fine particle in annular gap scrubber；Also can be by liquid film type wet cooling tower
Evaporation cools, and reduces the saturation wet gas amount into annular gap scrubber, further reduces the resistance of circumferential weld component, reach low
Resistance is efficient, low energy consumption high-efficiency.
6）Present system resistance is small, and unit compares usual semidry method system of converter less, and resistance damage reduces by 14%,
System can configure the blower fan power of lower power, and combination unit system operation power consumption reduces by 18%, it is contemplated that 1.2 KWhs/ton of steel of economize on electricity.
7）Present system takes up space and plane occupation of land is small.Invention unit equipment modularization integration degree is high, phase
About 40% is reduced for existing semidry method dust collecting process floor space of converter, system is concise, and flow is unobstructed compact, system dimension
Protect and simple, convenient.
8）Efficiency of dust collection of the present invention is high.If dried layer dedusting dehydration eddy flow is provided with adjustable circumferential weld washing dehydration demisting integrated tower
If plate and the export-oriented dehydrating demisting spiral board of dried layer, flue gas is exported respectively by gravitational settling in annular gap scrubber, Ash Water Separator,
Reflexed is upper, is further dehydrated using spiral board dedusting, enhances dehydrating demisting ability of the system to water mists, and depth is clean outer
Smoke discharging, it is ensured that exiting flue gas discharge dust content stably reaches existing state-set standard or more excellent local inner quality standard,
Dust content≤20mg/Nm3 is discharged i.e. after gas cleaning（Mark condition）Or lower discharge dust content, obvious environment benefit.
9）Cooling and dewatering efficiency high of the present invention.If it is provided with dried layer dedusting in adjustable circumferential weld washing dehydration demisting integrated tower to be dehydrated
If spiral board and the export-oriented dehydrating demisting spiral board of dried layer, flue gas is through further using spiral board dedusting to be dehydrated, after depth cleaning,
Then from bottom to top through multistage dehydrating demisting, its multistage dehydrating demisting, dehydrating demisting runner length, and it is the export-oriented rotation of low-drag type
Dehydration technique is flowed, aqueous vapor separates thorough and low energy consumption.System outlet flue gas gas temperature compares the usual converter once new OG genealogies of law
Unite low, thus, moisture content is that saturation moisture reduces than usual semidry method system in flue gas in flue gas, notable during gas recovery
The water content in coal gas is reduced, improves calorific value of gas, while substantially reduces and exports moisture with wet flue gas, reduces system circulation water consume
And water process expense, lift the gas quality of recovery.
10）Relative to existing semidry method dust collecting process of converter, because outlet drain dust contained flue gas concentration of the present invention is low,
The few blowing outs of the equipment such as draught fan impeller generation dust probability , Minus can significantly be slowed down and examine the time clearly, production operational availability is improved, extend
The service life of gas recovery system equipment and blower fan.Because dustiness is low, humidity is low, abrasiveness is small after gas cleaning, significantly
System maintenance work amount is reduced, improves reliability, the security of system operation.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure 1 be Non-Metallic Expansion Joints, 2 be gasification cooling flue, 3 be devaporizer, 4 be liquid film type evaporation it is cold
But tower, 5 be adjustable circumferential weld washing dehydration demisting integrated tower, 6 be banana bend pipe, 7 be liquid film generation trough, 8 be uptake flue, 9 be
Connection flue, 10 be flue gas mozzle, 11 be two-fluid aerosol spray gun I, 12 be belly cinder conveyer, 13 be removing ash pipeline, 14 be
Collection ash silo, 15 be collecting tank, 16 be dry and wet interface umbrella hood, 17 be rinse spray gun, 18 be two-fluid aerosol spray gun II, 19 be outer
To type dedusting dehydration spiral board, 20 be export-oriented dehydrating demisting spiral board I, 21 be pressure water fog spraying gun, 22 be the spray of normally opened water smoke
Rifle, 23 be drainpipe, 24 be self-cleaning water lute drainer, 25 be buck comb, 26 be blow-off pipe, 27 be overhead chute, 28 be
Feed pipe, 29 be explosion venting valve, 30 be export-oriented dehydrating demisting spiral board II, 31 be two-fluid aerosol spray gun III, 32 be adjustable loop
Seam washer body, 33 be scalable heavily cutting, 34 be hydraulic servomechanism, 35 be guide rod, 36 be wall ash vibrator, 37 be maintenance
Manhole, 38 are unloading valves.
Embodiment
A kind of flue gas low energy consumption semidry method dust pelletizing system of converter, including pass through Non-Metallic Expansion Joints 1 and vaporization
The devaporizer 3 that cooling stack 2 connects, liquid film type wet cooling tower 4 and the adjustable circumferential weld being connected with fans entrance pipe network
Washing dehydration demisting integrated tower 5, the lower end of the devaporizer 3 are connected with the bending tubes end of banana bend pipe 6, the banana bend pipe
6 smoke end is inscribed in the lower end of liquid film type wet cooling tower 4, and the upper end outer wall of liquid film type wet cooling tower 4 is cased with liquid film
Groove 7, the upper end of liquid film type wet cooling tower 4 are provided with uptake flue 8, and the port of export of uptake flue 8 is by connecting flue 9 with being built in
The upper end connection of flue gas mozzle 10 in adjustable circumferential weld washing dehydration demisting integrated tower 5；
Some prescriptions are distributed with the inner wall at end of gasification cooling flue 2 to downward two-fluid aerosol spray gun I11；
The crook lower end of the banana bend pipe 6 is provided with belly cinder conveyer 12, and the output end of the belly cinder conveyer 12 connects
It is connected to removing ash pipeline 13, the end connection collection ash silo 14 of the removing ash pipeline 13.
Annular space shape between the inwall lower end of liquid film type wet cooling tower 4 and the smoke end outer wall of banana bend pipe 6
Into collecting tank 15, the smoke end overcentre of banana bend pipe 6 is provided with dry and wet interface umbrella hood 16, dry and wet interface umbrella hood 16
Lower edge diameter be more than the smoke end diameter of banana bend pipe 6, the overcentre of dry and wet interface umbrella hood 16 is provided with direction
Flushing spray gun 17 directed downwardly, rinse the top of spray gun 17 and be provided with the two-fluid aerosol spray gun II18 of direction upward；
Adjustable circumferential weld weight washer and flue gas mozzle 10 are provided with the adjustable circumferential weld washing dehydration demisting integrated tower 5
Lower end connects, described export-oriented to remove if the lower end of the flue gas mozzle 10 is provided with dried layer export-oriented dedusting dehydration spiral board 19
If the top of dirt dehydration spiral board 19 is provided with the export-oriented dehydrating demisting spiral board I20 of dried layer positioned at the middle part of flue gas mozzle 10,
Upper end is provided with the downward some stressor layer water fog spraying guns 21 in direction, the export-oriented dedusting dehydration rotation in the flue gas mozzle 10
The upper and lower ends of flowing plate 19 are respectively equipped with normally opened water fog spraying gun 22, and the normally opened water fog spraying gun 22 is dehydrated towards export-oriented dedusting to be revolved
Flowing plate 19；
The side wall lower ends of the liquid film type wet cooling tower 4 are connected provided with drainpipe 23 with self-cleaning water lute drainer 24,
The side wall lower ends of the adjustable circumferential weld washing dehydration demisting integrated tower 5 connect provided with buck comb 25 with self-cleaning water lute drainer 24
Connect, self-cleaning water lute drainer 24 is connected by blow-off pipe 26 with overhead chute 27.
Further, the smoke end of the banana bend pipe 6 includes conical pipe and pipe, and the pipe is arranged on the upper of conical pipe
End, the lower edge diameter of dry and wet interface umbrella hood 16 are more than pipe diameter.
Further, water quality is provided with the liquid film generation trough 7, the side wall of the liquid film generation trough 7 is provided with feed pipe 28.
Further, the tangent connection of outer wall circumference of the arrival end and uptake flue 8 of the connection flue 9, the rising cigarette
The upper end in road 8 is provided with explosion venting valve 29.
Further, if being provided with the export-oriented dehydrating demisting eddy flow of dried layer in the adjustable circumferential weld washing dehydration demisting integrated tower 5
Plate II30, it is described export-oriented de- if the export-oriented dehydrating demisting spiral board II30 of the dried layer is located at the top of flue gas mozzle 10
The two-fluid aerosol spray gun III31 of direction upward is provided between water demisting spiral board II30 and flue gas mozzle 10.
Further, the adjustable circumferential weld weight washer includes adjustable annular gap scrubber body 32, scalable heavily cutting 33, liquid
Press servo control mechanism 34 and guide rod 35.
Further, the side wall of the banana bend pipe 6 is provided with wall ash vibrator 36.
Further, the side wall of the adjustable lower end of circumferential weld washing dehydration demisting integrated tower 5 is provided with inspection manhole 37.
Further, the upper end of the removing ash pipeline 13 is provided with unloading valve 38.
Embodiment 1
High-temperature flue gas caused by converter mouth, after movable gas hood is collected, by the cooling down of gasification cooling flue 2,
And some prescriptions are distributed with the inner wall at end of gasification cooling flue 2 to downward two-fluid aerosol spray gun I11, by flue gas temperature
Degree is down to 900 DEG C or so by 1450 DEG C -1600 DEG C, and flue gas is entered in devaporizer 3 by Non-Metallic Expansion Joints 1, by
In two-fluid aerosol spray gun I11 lasting spray so that when flue-gas temperature reaches banana 6 bottom of bend pipe, flue-gas temperature is down to 220
DEG C -300 DEG C, Non-Metallic Expansion Joints 1 have deviation of compensation when being stretched caused by the cold and hot temperature difference, compensating installation and subtracted
The effect of shake, expansion joint skeleton use 1Cr18Ni9Ti materials, and expander uses high temperature resistant non-metallic fabrics.Double-fluid water fog sprays
Rifle I11 medium is water and nitrogen（Steam）Water is that to be ejected in a nozzle angle formed below from the center of nozzle be about 120O
Hollow umbrella fluid barrier, and high steam then sprays from the annular slot of nozzle medium pore surrounding, and shape is at an angle
60OUmbrella steam stream, temperature is up to 200OC.When operating, high pressure steam flow is beaten on cooling current, water is changed into tiny water
Drop, water droplet evaporated by flue gas, and the heat of flue gas is absorbed in vaporescence so as to reduce flue-gas temperature.In banana bend pipe
6 crook lower end sets belly cinder conveyer 12, and the cinder that devaporizer 3 is separated is collected into banana bend pipe 6 by abdomen
Portion's cinder conveyer 12 is input in collection ash silo 14 by removing ash pipeline 13, and unloading valve 38 is set up on removing ash pipeline 13, realizes and is received
Ash is unloaded in the cinder timing of collection, sets wall ash vibrator 36 in the side wall of banana bend pipe 6, effectively avoids cinder from being bonded to banana bend pipe
Inwall on.
Flue gas after cooling enters in liquid film type wet cooling tower 4 from the smoke end of banana bend pipe 6, liquid film type evaporation cooling
Continue to cool to flue gas provided with double-fluid water fog spray gun II18 in tower 4, the liquid film of the upper end of liquid film type wet cooling tower 4 occurs
Down stream forms liquid film to inwall of the water along liquid film type wet cooling tower 4 in groove, effectively prevents flue dust to be bonded in liquid film type evaporation
On the inwall of cooling tower 4, the buck flow down along the inwall of liquid film type wet cooling tower 4 is collected in collecting tank 15, by draining
The waterpower of pipe 23 is drained into self-cleaning water lute drainer 24, and is discharged into by blow-off pipe 26 in overhead chute 27, on liquid film generation trough 7
Supplied water provided with feed pipe 28 is sustainable.
Flue gas after purification is built in adjustable circular seam washing under system fan suction function, by connecting the entrance of flue 9
In flue gas mozzle 10 in dehydrating demisting integrated tower 5, enter along flue gas mozzle 10 in adjustable circumferential weld weight washer, flue gas
The porch of mozzle 10 is provided with pressure water fog spraying gun 21, and pre-atomized cleaning solution, liquid film are provided for adjustable circumferential weld weight washer
In formula wet cooling tower the steam stream flue gas that is cooled into of high-temperature flue gas evaporation under suction function by flue gas mozzle 10 with
The water smoke that pressure water fog spraying gun 21 sprays at a high speed is imported in flue gas mozzle 10, and flue gas enters adjustable loop under blower negative pressure effect
Refined dedusting and the heat transfer cooling procedure of gas purification recovery are realized in seam weight washer, adjustable circumferential weld weight washer, which has, to be adjusted
Two kinds of functions of solar term amount and purification cooling coal gas, according to converter mouth differential pressure signal, are led to again using hydraulic servomechanism 34
Cross the adjustable circumferential weld weight washer lower end liftable heavily cutting 33 of actuating mechanism controls to move up and down, adjustable circumferential weld weight is passed through to coal gas
The size for hammering washer contact area into shape carries out dust content of gas control, that is, controls coal-gas recovering dust content 40mg/Nm3, row
Put dust content and be less than 30mg/Nm3.
The shell of adjustable circumferential weld weight washer and the outer wall of flue gas mozzle 10 and adjustable circumferential weld washing dehydration demisting one
If the export-oriented dedusting dehydration eddy flow of dried layer positioned at the bottom of flue gas mozzle 10 is provided with the annular space that the inwall of body tower 5 surrounds
Plate 19, and normally opened water fog spraying gun is arranged up and down at it, misty liquid droplets large area is disperseed on export-oriented dedusting dehydration spiral board 19,
Liquid film and liquid net are formed, strong agitation is formed with rotating upward gas-liquid, remixes, condenses, the physical process such as efficiently separates,
The fine soot dust granule in flue gas is removed, realizes that the depth of flue gas is clean, water supply system is normally opened；It is dehydrated and revolves in export-oriented dedusting
If the top of flowing plate 19 sets the export-oriented dehydrating demisting spiral board I20 of dried layer positioned at the middle part of flue gas mozzle 10, flue gas water conservancy diversion
If the top of pipe 10 sets the export-oriented dehydrating demisting spiral board II30 of dried layer, if flue gas passes through the export-oriented dehydrating demisting spiral board of dried layer
I20 and export-oriented dehydrating demisting spiral board II30 dehydrating demistings depth are clean, complete air-liquid separation, the liquid stream cohesion isolated
Formed between external diameter and tower wall of the moisture film through export-oriented dehydrating demisting spiral board I20 and export-oriented dehydrating demisting spiral board II30
Let out under narrow annular channel, self-cleaning water lute drainer 24, export-oriented dehydrating demisting spiral board are drained into by the waterpower of buck comb 25
II30 lower section is provided with the two-fluid aerosol spray gun III of direction upward, the outlet cigarette of adjustable circumferential weld washing dehydration demisting integrated tower 5
Temperature degree is cooled to 50-55 DEG C.
Flue gas is acted in blower negative pressure and entered after flue gas low energy consumption semidry method dust pelletizing system cooling and dedusting of converter
In fans entrance pipe network, three-way switch valve is boosted to by centrifugal blower.When flue gas meets recovery condition, flue gas is cut by threeway
Vavle switching is changed to water seal inverted valve, is honored as a queen by water seal inverted valve and gas holder Inlet water and is sent to gas chamber, then added by coal gas
Gas pressing is sent to each user by the booster fan at pressure station；When flue gas does not meet recovery condition, flue gas is cut through by-passing valve, threeway
Vavle switching is changed to diffusing chimney, then passes through blowdown stack ignition bleeding.
Embodiment 2
The t/ stoves of BOF nominal capacity 120, maximum molten iron charge weight：150t/ stoves；Maximum tap：145t；Converter
Smelting cycle：35 minutes；The Converter Oxigen Blowing time：14~17 minutes；Converter slag-making system：Single slag process；Maximum original furnace gas amount：
95000Nm3/h；
Devaporizer technical parameter：
Input gas temperature：1000 DEG C of Max, exit gas temperature：About 240 ~ 320 DEG C, nozzle quantity：12 ~ 14,
Bleed type：Mixed double-flow spray gun outside, water supply flow：46m3/h, water supply water temperature：≤ 35 DEG C, water supply pressure：0.8Mpa (contacts
Place), steam consumption quantity：5.5t/h steam pressure：1.0Mpa (junction), nitrogen amount：1200Nm3/h nitrogen pressures：
0.8Mpa (junction), flue-gas temperature：≤ 1000 DEG C of efficiency of dust collections：~ 52%, the amount of gathering dust：6.2t/h；Equipment resistance：≤
500Pa；
Liquid film type wet cooling tower：
Exit gas temperature：About ~ 72 DEG C, overflow water+double-current spray gun body water supply flow：60m3/h, water supply water temperature：≤40
DEG C, double-current spray gun body water supply pressure：0.8Mpa (junction), nitrogen amount：260Nm3/h nitrogen pressures：0.5Mpa (junction)
Exiting flue gas pressure： -1.3kPa；
Adjustable circumferential weld washing dehydration demisting integrated tower:Adjustable circular seam washing+export-oriented dehydrating demisting spiral board, which supplies water, to flow
Amount：170m3/h, water supply water temperature：≤ 40 DEG C, water supply pressure：0.42-0.5Mpa (junction), exiting flue gas pressure： -
16.5kPa；
More than, the preferred embodiment of patent only of the present invention, but protection scope of the present invention is not limited thereto, and it is any ripe
Those skilled in the art are known in the technical scope of present disclosure, by-determine professional technique and theoretical understanding,
The change or replacement that can be readily occurred in, should all cover the present invention conservation in the range of, therefore the present invention conservation scope with
The protection domain that claim is defined is defined.
Claims (8)
1. a kind of flue gas low energy consumption semidry method dust pelletizing system of converter, it is characterised in that including passing through the nonmetallic compensation of high temperature
Devaporizer that device is connected with gasification cooling flue, liquid film type wet cooling tower and it is connected with fans entrance pipe network adjustable
Circular seam washing dehydrating demisting integrated tower, the lower end of the devaporizer are connected with the bending tubes end of banana bend pipe, the banana-bends
The smoke end of pipe is inscribed in liquid film type wet cooling tower lower end, and liquid film type wet cooling tower upper end outer wall is cased with liquid film
Groove, liquid film type wet cooling tower upper end are provided with uptake flue, and the port of export of uptake flue is adjustable with being built in by connecting flue
The upper end connection of flue gas mozzle in circular seam washing dehydrating demisting integrated tower；
Some prescriptions are distributed with the gasification cooling flue inner wall at end to downward two-fluid aerosol spray gun I；
The crook lower end of the banana bend pipe is provided with belly cinder conveyer, and the output end of the belly cinder conveyer is connected with ash releasing tube
Road, the end connection collection ash silo of the removing ash pipeline；
Annular space between the liquid film type wet cooling tower inwall lower end and the smoke end outer wall of banana bend pipe forms liquid collecting
Groove, the smoke end overcentre of banana bend pipe are provided with dry and wet interface umbrella hood, the lower edge diameter of dry and wet interface umbrella hood
More than the smoke end diameter of banana bend pipe, the overcentre of dry and wet interface umbrella hood is provided with the flushing spray gun being directed downward,
Rinse above spray gun and be provided with the two-fluid aerosol spray gun II of direction upward；
Adjustable circumferential weld weight washer is provided with the adjustable circumferential weld washing dehydration demisting integrated tower with flue gas mozzle lower end to connect
Connect,
The shell of adjustable circumferential weld weight washer and the outer wall of flue gas mozzle and adjustable circumferential weld washing dehydration demisting integrated tower
It is described outer if being provided with the export-oriented dedusting dehydration spiral board of dried layer positioned at flue gas mozzle bottom in the annular space that inwall surrounds
If being provided with the export-oriented dehydrating demisting spiral board I of dried layer in the middle part of flue gas mozzle to the top of type dedusting dehydration spiral board,
Upper end is provided with the downward some stressor layer water fog spraying guns in direction, the export-oriented dedusting dehydration spiral board in the flue gas mozzle
Upper and lower ends be respectively equipped with normally opened water fog spraying gun, the normally opened water fog spraying gun is dehydrated spiral board towards export-oriented dedusting；
The side wall lower ends of the liquid film type wet cooling tower are connected provided with drainpipe with self-cleaning water lute drainer, the adjustable loop
The side wall lower ends of seam washing dehydration demisting integrated tower are connected provided with buck comb with self-cleaning water lute drainer, self-cleaning water seal row
Hydrophone is connected by blow-off pipe with overhead chute.
2. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
The smoke end of banana bend pipe includes conical pipe and pipe, and the pipe is arranged on the upper end of conical pipe, dry and wet interface umbrella shape
The lower edge diameter of cover is more than pipe diameter.
3. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
Water tooth weir is provided with liquid film generation trough, the side wall of the liquid film generation trough is provided with feed pipe.
4. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
The tangent connection of outer wall circumference of the arrival end and uptake flue of flue is connected, the upper end of the uptake flue is provided with explosion venting valve.
5. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
If the export-oriented dehydrating demisting spiral board II of dried layer is provided with adjustable circumferential weld washing dehydration demisting integrated tower, if the dried layer is export-oriented
Dehydrating demisting spiral board II is located at the top of flue gas mozzle, the export-oriented dehydrating demisting spiral board II and flue gas mozzle it
Between be provided with the two-fluid aerosol spray gun III of direction upward.
6. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
Adjustable circumferential weld weight washer includes adjustable annular gap scrubber body, scalable heavily cutting, hydraulic servomechanism and guide rod.
7. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
The side wall of banana bend pipe is provided with wall ash vibrator.
8. flue gas low energy consumption semidry method dust pelletizing system of a kind of converter according to claim 1, it is characterised in that described
The side wall of adjustable circumferential weld washing dehydration demisting integrated tower lower end is provided with inspection manhole, and the upper end of the removing ash pipeline, which is provided with, unloads ash
Valve.
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| CN105483319A (en) * | 2016-01-28 | 2016-04-13 | 北京中冶设备研究设计总院有限公司 | Converter gas tower Venturi dust removal device and method |
| CN107034335A (en) * | 2017-05-18 | 2017-08-11 | 中冶节能环保有限责任公司 | A kind of process system and method to ultra-clean dedusting of flue gas of converter |
| CN107090536A (en) * | 2017-06-26 | 2017-08-25 | 辽宁基伊能源科技有限公司 | Dry and wet mixing method converter gas one-time dedusting cleaning system |
| CN107841589B (en) * | 2017-11-20 | 2023-12-08 | 北京京诚科林环保科技有限公司 | Rotary flue device |
| CN108977616A (en) * | 2018-10-12 | 2018-12-11 | 中冶京诚工程技术有限公司 | Flue gas dry cleaning of converter and recovery system |
| CN110453033B (en) * | 2019-09-04 | 2021-04-02 | 鞍钢股份有限公司 | Cold state quick starting method for converter dry dedusting system |
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| CN102352422B (en) * | 2011-10-31 | 2013-02-06 | 中冶南方工程技术有限公司 | Evaporative cooling tower for dry method convertor gas dedusting |
| CN202786303U (en) * | 2012-08-08 | 2013-03-13 | 北京京诚泽宇能源环保工程技术有限公司 | Converter gas wet-dry hybrid dust removal system |
| CN103757176B (en) * | 2014-01-26 | 2015-09-30 | 江苏博际环境工程科技有限公司 | A kind of converter flue gas coal gas dust removal and advanced purification system |
| CN204999932U (en) * | 2015-09-04 | 2016-01-27 | 江苏博际喷雾系统有限公司 | Primary smoke of converter low energy consumption semidry method dust pelletizing system |
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Address after: 225267 388 dung North Road, three dung Industrial Park, Fairfax Town, Jiangdu District, Yangzhou, Jiangsu Patentee after: Jiangsu Boji Spraying Systems Holding Co., Ltd. Address before: 225267 388 dung North Road, three dung Industrial Park, Fairfax Town, Jiangdu District, Yangzhou, Jiangsu Patentee before: Boji Spray System Co., Ltd., Jiangsu Prov. |
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