CN103571993B - Converter dust removal equipment through semidry method - Google Patents
Converter dust removal equipment through semidry method Download PDFInfo
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- CN103571993B CN103571993B CN201210285496.2A CN201210285496A CN103571993B CN 103571993 B CN103571993 B CN 103571993B CN 201210285496 A CN201210285496 A CN 201210285496A CN 103571993 B CN103571993 B CN 103571993B
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides converter dust removal equipment by semidry method. Two ends of the equipment are connected with a vaporization flue and a fan respectively; the equipment comprises a dry evaporative cooler, a wet electrostatic precipitator, dry dust outward transport equipment, circulating water treatment equipment and mud or sludge outward transport equipment, wherein the dry evaporative cooler is connected with the vaporization flue and is used for cooling high-temperature flue gas and performing coarse dust removal; the wet electrostatic precipitator is respectively connected with the dry evaporative cooler and the fan and is used for fine dust removal and demisting of the flue gas; the dry dust outward transport equipment is connected with the dry evaporative cooler; the circulating water treatment equipment is connected with the wet electrostatic precipitator; the mud or sludge outward transport equipment is connected with the circulating water treatment equipment. The dry evaporative cooler and the wet electrostatic precipitator are combined, so that the dust concentration of the discharge flue gas and recovered coal gas can be reduced, the sewage treatment amount of washing the dust is reduced, and the energy consumption is reduced. The equipment is simple in structure and easy to maintain, the explosion hidden danger is reduced, direct emission pollution of dirt flue gas is eliminated, and the equipment is suitable for novel converter dust removal and is particularly suitable for technical transformation of conventional wet and dry dust removal systems.
Description
Technical field
The present invention relates to metallurgy environment protection and field of resource recovery technique, in particular it relates to converter
Flue gas coal gas combination is using dry type vapotron and the Converter dust removal equipment through semidry of wet cottrell.
Background technology
In prior art, once dust collection of converter always more adopts wet method, small part to adopt dry method.Fig. 1 is of the prior art
A kind of modular structure schematic diagram of Wet Dust-trapping of Converter equipment.As shown in figure 1, converter 101 is used as flue gas source and collection flue gas
Petticoat pipe 102 be connected, then connect 20～30 meters long of 103 cooled flue gas of evaporated flue.Then evaporated flue 103 is removed with wet method
Dirt equipment 100 is connected, the wet process dust collection device 100 can include water spraying cooler 104, smart cleaner unit 105, dehydrator 106,
Circulating water treatment device 107 and mud or sludge outward transport equipment 108.Wherein, the water spraying cooler 104 can be Venturi tube or
Person's saturator, is connected with evaporated flue 103.The smart cleaner unit 105 can also be Venturi tube, with 104 phase of water spraying cooler
Connection.The dehydrator 106 is connected with smart cleaner unit 105.Circulating water treatment device 107 is removed with water spraying cooler 104, essence respectively
Dirt device 105 is connected with dehydrator 106, and the dry dust in flue gas in each step is deposited.Mud or sludge outward transport set
Standby 108 are connected with circulating water treatment device 107, and mud or sludge that dedusting deposits generation are transported outward away.In wet dedusting
Give a dinner for a visitor from afar after equipment 100 machine 109, blower fan 109 connects three-way valve 110 again, and diffusing chimney 111 is led in one end, and the other end leads to coal gas
Cabinet 112.Gas chamber 112 is connected with wet cottrell 113 again, the gas compressor 114 in pipeline, is transported to coal
Gas user 115.
The major advantage of above-mentioned wet process dust collection device 100 is cleaner simple structure, operation maintenance is easy, discharge steady
It is fixed, but also there is following subject matter：
1. discharge flue gas and gas recovery dust concentration is up to 50-100mg/Nm3, can not meet China and the world is big
Countries and the environment protection control requirements in area, the dust major part particularly discharged is very harmful PM2.5 fine grained powder
Dirt, gas recovery are so usual that to be purified to≤10mg/Nm again using wet cottrell after gas chamber3After economically could do
For fuel utilization；And being used for the gas turbine direct generation of electricity then needs further to be purified to≤1mg/Nm in entrance3；
2. water process invests that many, floor space is big, operating cost is high.Because the dust in flue gas is all washed into row
In water, and the cooling of high-temperature flue gas also fully relies on water spray intensification heat exchange and realizes, so up to 1000 tons of quantity of circulating water/
When, water process investment generally accounts for more than the 50% of dust pelletizing system gross investment, in terms of million or ten million yuans；
3. high energy consumption, circulating water treatment operation energy consumption it is high and caused by blower pressure is high one-time dedusting blower fan power consumption be combined into it is dry
About 2 times of method power consumption.
Fig. 2 is a kind of modular structure schematic diagram of converter dry cleaner of the prior art.As shown in Fig. 2 converter
201 originate as flue gas is connected with the petticoat pipe 202 for collecting flue gas, then connects 20～30 meters long of the cooling cigarette of evaporated flue 203
Gas.Then evaporated flue 203 is connected with dry dust removal equipment 200, and the dry dust removal equipment 200 can include vapotron
204th, dry electrostatic cleaner 205 and dry dust outward transport equipment 208.Wherein, the vapotron 204 and 203 phase of evaporated flue
Connection, sprays very small amount of water.The dry electrostatic cleaner 205 is connected with vapotron 204, with Electrostatic Absorption machinery
The mode of rapping carries out smart dedusting.Dry dust outward transport equipment 208 respectively with vapotron 204 and dry electrostatic cleaner 205
It is connected, the dry dust that dry method dust is produced is transported outward away.The spindle flow fan 209 after dry dust removal equipment 200, axle stream
Blower fan 209 connects switching station 210 again, and lead to diffusing chimney 211 for one end, and the other end leads to gas cooler 216.Gas cooler
216 connect circulating cooling wetting system 213, and the temperature of coal gas is down to less than 70 DEG C, then connect gas chamber 212 again.Gas chamber 212 is again
Gas compressor 214 in pipeline, is transported to coal gas user 215.
The major advantage of above-mentioned dry dust removal equipment 200 is that dust is recycled using dry ash mode completely, makes recirculated water
Processing system is greatly simplified；The dust concentration of discharge flue gas and gas recovery is low, can directly reach≤10mg/Nm3；System hinders
Damage that little power consumption is low, only about half of wet method power consumption, but there are further problems：
1. maintenance capacity is big：Mainly vapotron 204, gas piping, particularly 205 dust stratification of dry electrostatic cleaner are led
Cause maintenance of equipment amount is big, maintenance cost is high, and maintenance process affects the production of converter 201；
2. it is big that chain many, Operation and Maintenance difficulty is automatically controlled, when system is normally run very well, once the Measuring error that goes wrong
Difficulty, also reduces the operating rate of converter 201；
3. venting of dust explosion hidden danger be present in various degree, and venting of dust explosion not only damage equipment also results in dirty smoke directly ventilating pollution.
Chinese invention patent CN02136785.X discloses a kind of process through converter semi-dry dust collecting process, and it is cold that combination employs evaporation
But scrubber+wet electrical dust precipitator, dust is all washed in draining as wet method, though water process amount has been reduced,
But can not thoroughly solve a sewage disposal difficult problem.Chinese patent CN10138263A discloses a kind of converter gas cooling, purification side
Method, carries out preliminary cooling and purification using dry type vapotron, but continues to use Venturi tube carrying out smart dedusting, dedusting energy to flue gas
Consumption and discharge are all still high.Japan Patent JPA 1981075508, JPA1987093308, JP 63297520A 1-5 are disclosed
Different types of process through converter semi-dry dust collecting process and equipment, dry calibration dedusting are respectively adopted blade dedusting+dust removal by filtration, whirlwind
The difference dry type high-temperature flue gas cooling such as cleaner unit+waste heat boiler or granular layer cooling and dedusting and rough cleaner, but wet dedusting edge
With Venturi tube, it is impossible to solve the problems, such as the high caused high energy consumption of wet method blower pressure.
The content of the invention
The technical problem to be solved is to provide a kind of Converter dust removal equipment through semidry, can reduce discharging flue gas
With the dust concentration of gas recovery, the sewage load of washing dust, reducing energy consumption are reduced.
To solve above-mentioned technical problem, the present invention provides a kind of Converter dust removal equipment through semidry, and two ends are vaporized with one respectively
Flue and a blower fan are connected, including：
Dry type vapotron, is connected with the evaporated flue, the cooling and thick dedusting for high-temperature flue gas；
Wet cottrell, is connected with the dry type vapotron and the blower fan, respectively for the essence of flue gas
Dedusting and demisting；
Dry dust transports outward equipment, is connected with the dry type vapotron；
Circulating water treatment device, is connected with the wet cottrell；And
Mud or sludge outward transport equipment, are connected with the circulating water treatment device.
Alternatively, the dry type vapotron has Direct spraying evaporation component, the Direct spraying evaporation component bag
Include evaporation cooling water inlet pipe and atomizing medium delivery pipe.
Alternatively, the exiting flue gas of the dry type vapotron pass through a duct coupling and the wet cottrell
It is connected.
Alternatively, the quantity of the wet cottrell is one group or multigroup, using vertical or horizontal be arranged in
In workshop or outside workshop.
Alternatively, the blower fan is one-time dedusting blower fan.
Compared with prior art, the present invention has advantages below：
The present invention using dry type vapotron and wet cottrell, can be reduced discharging flue gas and be returned by combination
The dust concentration of coal gas is received, the sewage load of washing dust is reduced, is reduced energy consumption.
In addition, the simple structure of the present invention and for ease of maintenaince, reduces venting of dust explosion hidden danger, prevent dirty smoke directly ventilating pollution, be adapted to
Newly-built converter dust-removing is adopted, and is more particularly suited for the technological transformation to existing wet method and dry-dedusting system.
Description of the drawings
The above and other features of the present invention, property and advantage are by by retouching with reference to the accompanying drawings and examples
State and become readily apparent from, wherein：
Fig. 1 is a kind of modular structure schematic diagram of Wet Dust-trapping of Converter equipment of the prior art；
Fig. 2 is a kind of modular structure schematic diagram of converter dry cleaner of the prior art；
Modular structure schematic diagrams of the Fig. 3 for the Converter dust removal equipment through semidry of one embodiment of the invention；
Fig. 4 is vertical for the Converter dust removal equipment through semidry of the vertical wet cottrell of employing of one embodiment of the invention
Body structural representation；
Fig. 5 is vertical for the Converter dust removal equipment through semidry of the employing horizontal wet electrostatic precipitator of one embodiment of the invention
Body structural representation.
Specific embodiment
With reference to specific embodiments and the drawings, the invention will be further described, elaborates in the following description more
Details in order to fully understand the present invention, but the present invention obviously can come real different from this alternate manner for describing with various
Apply, those skilled in the art in the case of without prejudice to intension of the present invention can make similar popularization, drill according to practical situations
Unravel silk, therefore should not be with content constraints protection scope of the present invention of this specific embodiment.
Modular structure schematic diagrams of the Fig. 3 for the Converter dust removal equipment through semidry of one embodiment of the invention.Should be noted
It is that only as an example, which is drawn according to the condition of equal proportion, and should not for these and follow-up others accompanying drawing
Should be construed as limiting in this, as the protection domain to actual requirement of the present invention.
As shown in figure 3, converter 301 is connected with the petticoat pipe 302 of collection flue gas as flue gas source first, then connect 20～
30 meters long of 303 cooled flue gas of evaporated flue.Then 300 phase of semidry method cleaner in evaporated flue 303 and the present embodiment
Connection, the semidry method cleaner 300 can be included outside dry type vapotron 304, wet cottrell 305, dry dust
Fortune equipment 306, circulating water treatment device 307 and mud or sludge outward transport equipment 308.Wherein, the dry type vapotron 304 1
As be arranged in 303 exit of evaporated flue in workshop, be connected with evaporated flue 303, cooling for high-temperature flue gas and slightly remove
Dirt.The quantity of wet cottrell 305 can be one group or multigroup, using vertical or horizontal be arranged in workshop or car
Between it is outer, be connected with dry type vapotron 304 and blower fan 309 respectively, the smart dedusting and demisting for flue gas.Dry dust is transported outward
Equipment 306 is connected with dry type vapotron 304.Circulating water treatment device 307 is connected with wet cottrell 305,
Mud or sludge outward transport equipment 308 are connected with circulating water treatment device 307, and dedusting is deposited the mud or sludge outward transport for producing
Go out.Give a dinner for a visitor from afar after wet cottrell 305 machine 309, the blower fan 309 can be one-time dedusting blower fan, after blower fan 309
Three-way valve 310 is connect again, and lead to diffusing chimney 311 for one end, and the other end leads to gas chamber 312.Coal of the gas chamber 312 in pipeline
Gas pressuring machine 314, is transported to coal gas user 315.
In the present embodiment, flue gas of high temperature that converter is produced, is carried out in gasification cooling flue (i.e. evaporated flue)
Cooling recovery waste heat, after flue-gas temperature drops to 700～1000 DEG C, enter into dry type vapotron.The dry type evaporation cooling
Device adopts Direct spraying evaporation technique, by direct atomized water spray evaporation cooling and thick dedusting are carried out to flue gas, steams flue-gas temperature
Send out and be cooled to 90～300 DEG C, thick dedusting separates and reclaims the efficiency of dry dust and reaches 40～80%, and the dry dust of generation passes through vapour
Car or other carrying methods are transported outward, it is ensured that exiting flue gas are unsaturated dry flue gas.
Flue gas after the cooling of dry type vapotron and thick dedusting, enters wet static dedusting by duct coupling
Device, is further cooled to saturation and dedusting in duct coupling or in wet cottrell, then by one or
The wet cottrell essence dedusting of multiple electric fields and demisting.The version of wet cottrell, can be according to live bar
Part considers sufficiently anti-venting of dust explosion measure using vertical or horizontal.Pass through blower fan after smart dedusting demisting and three-way switch valve is discharged
Flue gas, or reclaim coal gas of converter.Outlet dust concentration needs to be reduced to≤10 or 1mg/Nm according to subsequent process3.System
Pressure balance is realized using ac variable frequency speed regulation by blower fan, or is realized by other type voltage adjusting devices.
Fig. 4 is vertical for the Converter dust removal equipment through semidry of the vertical wet cottrell of employing of one embodiment of the invention
Body structural representation.As shown in figure 4, the component names referred to by reference therein are as follows：
41：High-temperature flue gas import；42：Dry type vapotron；421：Evaporation cooling water inlet pipe；422：Atomizing medium is conveyed
Pipe；43：Ash-discharging device；44：Duct coupling；45：Wet cottrell；451：Pump station of recirculation water；452：Airflow-distribution board；
453：High voltage power supply device；454：Spraying-rinsing system；46：Neat stress is exported；47：Sludge or slurry outlet；48：Dust-collecting pipe and
Polar curve.
In the present embodiment, the atomizing medium can be nitrogen or steam.The dry type vapotron 304 has direct
Spray evaporation part, the Direct spraying evaporation component include evaporating cooling water inlet pipe 421 and atomizing medium delivery pipe 422.Separately
Outward, the exiting flue gas of the dry type vapotron 304 are connected with wet cottrell 305 by duct coupling 44.
Fig. 5 is vertical for the Converter dust removal equipment through semidry of the employing horizontal wet electrostatic precipitator of one embodiment of the invention
Body structural representation.As shown in figure 5, the component names referred to by reference therein are identical with embodiment shown in Fig. 4, only
Being wet cottrell 45 is changed into horizontal by vertical, and this is adopted according to field condition, other part annexations
All same.
The number of dedusting is carried out using the Converter dust removal equipment through semidry of the vertical wet cottrell of embodiment illustrated in fig. 4
According to as follows, by taking 120 tons of converters as an example：
BOF nominal capacity：120 tons
Import flue gas maximum stream flow：～95,000Nm3/h
Input gas temperature：700-1000℃
Import dust contained flue gas concentration：70-200g/Nm3
The maximum injection flow rate of evaporation cooling：15-30t/h
Maximum total injection flow rate：40-60t/h
The new water yield is supplemented averagely：5-10t/h
Atomizing medium requirement：Nitrogen 1000-1200Nm3/ h, steam 3-5t/h
Exit gas temperature：90-300 DEG C (designing according to field condition)
Receive dry ash amount：30-160g/Nm3(3-10t/h)
Vertical wet type electrostatic dust remover electric field wind speed：0.6-4m/s
Vertical wet cottrell efficiency of dust collection：>=90-99% (single electric field)
Vertical wet type electrostatic dust remover electric field number：One or more
Exit gas temperature：25-70℃
Dust pelletizing system always hinders damage：1-3kPa
Exiting flue gas dust content：≤ 10 or 1mg/Nm3。
The number of dedusting is carried out using the Converter dust removal equipment through semidry of the horizontal wet electrostatic precipitator of embodiment illustrated in fig. 5
According to as follows, by taking 250 tons of converters as an example：
BOF nominal capacity：250 tons
Import flue gas maximum stream flow：～170,000Nm3/h
Input gas temperature：700-1000℃
Import dust contained flue gas concentration：70-200g/Nm3
The maximum injection flow rate of evaporation cooling：40-65t/h
Maximum total injection flow rate：80-110t/h
The new water yield is supplemented averagely：8-15t/h
Atomizing medium requirement：Nitrogen 1500-2000Nm3/ h, steam 6-10t/h
Exit gas temperature：90-300 DEG C (designing according to field condition)
Receive dry ash amount：30-160g/Nm3(6-20t/h)
Wet cottrell field gas velocity：0.6-4m/s
Wet cottrell efficiency of dust collection：>=90-99% (single electric field)
Wet cottrell electric field number：One or more
Exit gas temperature：25-70℃
Dust pelletizing system always hinders damage：1-3kPa
Exiting flue gas dust content：≤ 10 or 1mg/Nm3。
The present invention using dry type vapotron and wet cottrell, can be reduced discharging flue gas and be returned by combination
The dust concentration of coal gas is received, the sewage load of washing dust is reduced, is reduced energy consumption.
In addition, the simple structure of the present invention and for ease of maintenaince, reduces venting of dust explosion hidden danger, prevent dirty smoke directly ventilating pollution, be adapted to
Newly-built converter dust-removing is adopted, and is more particularly suited for the technological transformation to existing wet method and dry-dedusting system.
Although the present invention is disclosed as above with preferred embodiment, which is not for limiting the present invention, any this area skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore, it is every without departing from
The content of technical solution of the present invention, any modification above example made according to the technical spirit of the present invention, equivalent variations
And modification, each fall within the protection domain defined by the claims in the present invention.
Claims (4)
1. a kind of Converter dust removal equipment through semidry (300), two ends are connected with an evaporated flue (303) and a blower fan (309) respectively
Connect, it is characterised in that include：
Dry type vapotron (304), is connected with the evaporated flue (303), the cooling and thick dedusting for high-temperature flue gas；
Wet cottrell (305), is connected with the dry type vapotron (304) and the blower fan (309) respectively, is used
In smart dedusting and the demisting of flue gas；
Dry dust outward transport equipment (306), is connected with the dry type vapotron (304)；
Circulating water treatment device (307), is connected with the wet cottrell (305)；And
Mud or sludge outward transport equipment (308), are connected with the circulating water treatment device (307)；
Wherein, the exiting flue gas of the dry type vapotron (304) are removed by a duct coupling (44) and the wet electrostatic
Dirt device (305) is connected.
2. Converter dust removal equipment through semidry (300) according to claim 1, it is characterised in that the dry type evaporation cooling
With Direct spraying evaporation component, the Direct spraying evaporation component includes evaporating cooling water inlet pipe (421) and mist device (304)
Change medium delivery pipe (422).
3. Converter dust removal equipment through semidry (300) according to claim 1 and 2, it is characterised in that the wet electrostatic is removed
The quantity of dirt device (305) is one group or multigroup, using vertical or horizontal be arranged in workshop or outside workshop.
4. Converter dust removal equipment through semidry (300) according to claim 1, it is characterised in that the blower fan (309) is
Secondary dedusting fan.
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| CN201210285496.2A CN103571993B (en) | 2012-08-10 | 2012-08-10 | Converter dust removal equipment through semidry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285496.2A CN103571993B (en) | 2012-08-10 | 2012-08-10 | Converter dust removal equipment through semidry method |
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| CN103571993A CN103571993A (en) | 2014-02-12 |
| CN103571993B true CN103571993B (en) | 2017-05-03 |
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| CN114058773A (en) * | 2021-11-04 | 2022-02-18 | 江苏天洁环境工程有限公司 | Efficient purifying and dedusting system and method for converter gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202823071U (en) * | 2012-08-10 | 2013-03-27 | 斯普瑞喷雾系统(上海)有限公司 | Converter semi-dry method dust-cleaning equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07100812B2 (en) * | 1987-05-29 | 1995-11-01 | 旭硝子株式会社 | Metallurgical furnace exhaust gas treatment equipment |
| JP2002292238A (en) * | 2001-03-30 | 2002-10-08 | Sumitomo Heavy Ind Ltd | Waste gas treatment system |
| CN1276098C (en) * | 2002-09-04 | 2006-09-20 | 上海外高桥喷雾系统有限公司 | Technique for dedusting flue gas of rotating furnace through semi-dry process |
| CN101624641A (en) * | 2008-07-08 | 2010-01-13 | 上海西重所重型机械成套有限公司 | Flue gas purification process through converter semi-dry process |
| CN202081122U (en) * | 2011-05-20 | 2011-12-21 | 中冶赛迪工程技术股份有限公司 | Dust removal device adopting dry method for coal gas of converter |
| CN102382933A (en) * | 2011-10-31 | 2012-03-21 | 中冶南方工程技术有限公司 | One-time flue gas dry-process dust removing process of converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202823071U (en) * | 2012-08-10 | 2013-03-27 | 斯普瑞喷雾系统(上海)有限公司 | Converter semi-dry method dust-cleaning equipment |
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