CN103571993A - Converter dust removal equipment through semidry method - Google Patents
Converter dust removal equipment through semidry method Download PDFInfo
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- CN103571993A CN103571993A CN201210285496.2A CN201210285496A CN103571993A CN 103571993 A CN103571993 A CN 103571993A CN 201210285496 A CN201210285496 A CN 201210285496A CN 103571993 A CN103571993 A CN 103571993A
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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 resource recycling technical field, specifically, the present invention relates to the process through converter semi-dry dust removal installation that a flue gas coal gas combination of converter adopts dry type evaporative cooler and wet cottrell.
Background technology
In prior art, once dust collection of converter adopts wet methods more always, and small part adopts dry method.Fig. 1 is the modular structure schematic diagram of a kind of Wet Dust-trapping of Converter equipment of the prior art.As shown in Figure 1, converter 101 is connected with the petticoat pipe 102 of collecting flue gas as flue gas source, then connects 20～30 meters of long evaporated flue 103 cooled flue gas.Then evaporated flue 103 is connected with wet process dust collection device 100, and this wet process dust collection device 100 can comprise water spraying cooler 104, smart fly-ash separator 105, water trap 106, circulating water treatment device 107 and mud or mud outward transport equipment 108.Wherein, this water spraying cooler 104 can be Venturi tube or saturex, is connected with evaporated flue 103.This essence fly-ash separator 105 can be also Venturi tube, is connected with water spraying cooler 104.This water trap 106 is connected with smart fly-ash separator 105.Circulating water treatment device 107 is connected with water spraying cooler 104, smart fly-ash separator 105 and water trap 106 respectively, and the dry dust in flue gas in each step is deposited.Mud or mud outward transport equipment 108 are connected with circulating water treatment device 107, and mud or mud that dedusting deposition is produced are transported outward away.The machine 109 of giving a dinner for a visitor from afar after wet process dust collection device 100, blower fan 109 connects again T-valve 110, and diffusing chimney 111 is led in one end, and the other end leads to gas chamber 112.Gas chamber 112 is connected with wet cottrell 113 again, and the gas compressor 114 through in pipeline, is transported to coal gas user 115.
The major advantage of above-mentioned wet process dust collection device 100 is that dust removal installation is simple in structure, operating maintenance easy, discharge is stable, but also has following subject matter:
1. discharge flue gas and gas recovery dust concentration are up to 50-100mg/Nm
3china and world's most countries and regional environment protection control requirements can not have been met, particularly the dust major part of discharge is very harmful PM2.5 particle dust, and gas recovery is common must adopt be purified to again≤10mg/Nm of wet cottrell after gas chamber
3after could be economically as fuel utilization; Need to be further purified at entrance≤1mg/Nm for the internal combustion turbine direct generation of electricity
3;
2. water treatment investment is many, floor space is large, running cost is high.Because being all washed, the dust in flue gas enters in draining, and the cooling of high-temperature flue gas also relies on water spray intensification heat exchange to realize completely, so quantity of circulating water be up to 1000 tons/time, water treatment investment accounts for the more than 50% of dust-removal system gross investment conventionally, in 1,000,000 or ten million yuans;
3. energy consumption is high, and circulating water treatment operation energy consumption height and the high one-time dedusting blower fan power consumption causing of blower pressure are combined into approximately 2 times of dry method power consumption.
Fig. 2 is the modular structure schematic diagram of a kind of converter dry dust removal installation of the prior art.As shown in Figure 2, converter 201 is connected with the petticoat pipe 202 of collecting flue gas as flue gas source, then connects 20～30 meters of long evaporated flue 203 cooled flue gas.Then evaporated flue 203 is connected with dry dust removal equipment 200, and this dry dust removal equipment 200 can comprise evaporative cooler 204, dry electrostatic cleaner 205 and dry dust outward transport equipment 208.Wherein, this evaporative cooler 204 is connected with evaporated flue 203, sprays very small amount of water.This dry electrostatic cleaner 205 is connected with evaporative cooler 204, in the mode of electrostatic adhesion machinery rapping, carries out smart dedusting.Dry dust outward transport equipment 208 is connected with dry electrostatic cleaner 205 with evaporative cooler 204 respectively, and the dry dust that dry method dust is produced is transported outward away.Spindle flow fan 209 after dry dust removal equipment 200, aerofoil fan 209 connects again switching station 210, and diffusing chimney 211 is led in one end, and the other end leads to gas cooler 216.Gas cooler 216 connects circulating cooling wetting system 213, and the temperature of coal gas is down to below 70 ℃, then connects again gas chamber 212.Gas chamber 212 passes through the gas compressor 214 in pipeline again, is transported to coal gas user 215.
The major advantage of above-mentioned dry dust removal equipment 200 is that dust adopts dry ash mode to recycle completely, and circular water treating system is greatly simplified; The dust concentration of discharge flue gas and gas recovery is low, can directly reach≤10mg/Nm
3; It is low that little power consumption is damaged in system resistance, only have wet method power consumption pact half, but there are more problems:
1. maintenance capacity is large: be mainly that evaporative cooler 204, gas line, particularly dry electrostatic cleaner 205 dust stratifications cause that maintenance of equipment amount is large, maintenance cost is high, and maintenance process affects the production of converter 201;
2. automatically control chain many, Operation and Maintenance difficulty is large, fine when system is normally moved, once go wrong, detects maintenance difficulty, also reduces the operating rate of converter 201;
3. have in various degree venting of dust explosion hidden danger, venting of dust explosion is damage equipment not only, also causes dirty smoke directly ventilating to pollute.
Chinese invention patent CN02136785.X discloses a kind of process through converter semi-dry dust collecting process, combination has adopted transpiration cooling washer+wet electrical dust precipitator, dust the same as wet method is all washed and enters in draining, though water treatment amount reduces to some extent, can not thoroughly solve a sewage disposal difficult problem.Chinese patent CN10138263A discloses that a kind of converter gas is cooling, purifying method, adopts dry type evaporative cooler to carry out flue gas preliminary cooling and purify, but continue to use Venturi meter, carries out smart dedusting, and dedusting energy consumption and discharge are all still high.Japanese Patent JPA 1981075508, JPA1987093308, JP 63297520A 1-5 discloses dissimilar process through converter semi-dry dust collecting process and equipment, dry type cooling and dedusting adopts respectively the cooling and rough cleaner of the different dry type high-temperature flue gas such as blade dedusting+dust removal by filtration, tornado dust collector+waste heat boiler or granular layer cooling and dedusting, but Venturi meter is continued to use in wet dedusting, can not solve the high problem of the high energy consumption causing of wet method blower pressure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of process through converter semi-dry dust removal installation, can reduce the dust concentration of discharge flue gas and gas recovery, reduces the sewage load of washing dust, reduces energy consumption.
For solving the problems of the technologies described above, the invention provides a kind of process through converter semi-dry dust removal installation, two ends are connected with a blower fan with an evaporated flue respectively, comprising:
Dry type evaporative cooler, is connected with described evaporated flue, for the cooling and thick dedusting of high-temperature flue gas;
Wet cottrell, is connected with described blower fan with described dry type evaporative cooler respectively, for smart dedusting and the demist of flue gas;
Dry dust outward transport equipment, is connected with described dry type evaporative cooler;
Circulating water treatment device, is connected with described wet cottrell; And
Mud or mud outward transport equipment, be connected with described circulating water treatment device.
Alternatively, described dry type evaporative cooler has Direct spraying evaporation component, and described Direct spraying evaporation component comprises transpiration cooling water water inlet pipe and atomizing medium transfer lime.
Alternatively, the outlet flue gas of described dry type evaporative cooler is connected with described wet cottrell by a duct coupling.
Alternatively, the quantity of described wet cottrell is one group or many groups, adopts vertical or horizontal being arranged in outside Nei Huo workshop, workshop.
Alternatively, described blower fan is one-time dedusting blower fan.
Compared with prior art, the present invention has the following advantages:
The present invention adopts dry type evaporative cooler and wet cottrell by combination, can reduce the dust concentration of discharge flue gas and gas recovery, reduces the sewage load of washing dust, has reduced energy consumption.
In addition, of the present invention simple in structure and for ease of maintenaince, reduce venting of dust explosion hidden danger, stop dirty smoke directly ventilating and pollute, be applicable to newly-built converter dust-removing and adopt, be more specially adapted to the technological transformation to existing wet method and dry-dedusting system.
Accompanying drawing explanation
The above and other features of the present invention, character and advantage become more obvious by the description by below in conjunction with drawings and Examples, wherein:
Fig. 1 is the modular structure schematic diagram of a kind of Wet Dust-trapping of Converter equipment of the prior art;
Fig. 2 is the modular structure schematic diagram of a kind of converter dry dust removal installation of the prior art;
Fig. 3 is the modular structure schematic diagram of the process through converter semi-dry dust removal installation of one embodiment of the invention;
Fig. 4 is the perspective view of process through converter semi-dry dust removal installation of the vertical wet cottrell of employing of one embodiment of the invention;
Fig. 5 is the perspective view of process through converter semi-dry dust removal installation of the employing horizontal wet electrostatic precipitator of one embodiment of the invention.
Embodiment
Below in conjunction with specific embodiments and the drawings, the invention will be further described; set forth in the following description more details so that fully understand the present invention; but the present invention obviously can implement with the multiple alternate manner that is different from this description; those skilled in the art can do similar popularization, deduction according to practical situations without prejudice to intension of the present invention in the situation that, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 3 is the modular structure schematic diagram of the process through converter semi-dry dust removal installation of one embodiment of the invention.It should be noted that these and follow-up other accompanying drawing are all only as example, it is not to draw according to the condition of equal proportion, and should not using that this is construed as limiting as the protection domain to actual requirement of the present invention.
As shown in Figure 3, first converter 301 is connected with the petticoat pipe 302 of collecting flue gas as flue gas source, then connects 20～30 meters of long evaporated flue 303 cooled flue gas.Then evaporated flue 303 is connected with the semidrying dust removal installation 300 in the present embodiment, and this semidrying dust removal installation 300 can comprise dry type evaporative cooler 304, wet cottrell 305, dry dust outward transport equipment 306, circulating water treatment device 307 and mud or mud outward transport equipment 308.Wherein, this dry type evaporative cooler 304 is generally arranged in evaporated flue 303 exits in workshop, is connected, for the cooling and thick dedusting of high-temperature flue gas with evaporated flue 303.The quantity of wet cottrell 305 can be one group or many groups, adopts vertical or horizontal being arranged in outside Nei Huo workshop, workshop, is connected respectively, for smart dedusting and the demist of flue gas with dry type evaporative cooler 304 with blower fan 309.Dry dust outward transport equipment 306 is connected with dry type evaporative cooler 304.Circulating water treatment device 307 is connected with wet cottrell 305, and mud or mud outward transport equipment 308 are connected with circulating water treatment device 307, and mud or mud that dedusting deposition is produced are transported outward away.The machine 309 of giving a dinner for a visitor from afar after wet cottrell 305, this blower fan 309 can be one-time dedusting blower fan, after blower fan 309, connects again T-valve 310, and diffusing chimney 311 is led in one end, and the other end leads to gas chamber 312.Gas chamber 312, through the gas compressor 314 in pipeline, is transported to coal gas user 315.
In the present embodiment, flue gas of high temperature that converter produces carries out cooling and recovery waste heat in gasification cooling flue (being evaporated flue), and flue-gas temperature drops to after 700～1000 ℃, enters into dry type evaporative cooler.This dry type evaporative cooler adopts Direct spraying evaporation technique, by flue gas being carried out to direct atomized water spray transpiration cooling and thick dedusting, make flue-gas temperature transpiration cooling to 90～300 ℃, thick dedusting efficiency separated and recovery dry dust reaches 40～80%, the dry dust producing is transported outward by automobile or other carrying method, and guaranteeing to export flue gas is unsaturated dry flue gas.
Flue gas through dry type evaporative cooler after cooling and thick dedusting, by duct coupling, enter wet cottrell, in duct coupling or in wet cottrell, be further cooled to state of saturation and dedusting, then by wet cottrell essence dedusting and the demist of one or more electric fields.The structure formation of wet cottrell, can adopt according to field condition vertically or horizontal, all considers sufficient anti-venting of dust explosion measure.After essence dedusting demist, by blower fan and three-way switch valve, discharge flue gas, or reclaim coal gas of converter.Outlet dust concentration according to subsequent process need to be reduced to≤10 or 1mg/Nm
3.The pressure equilibrium of system adopts ac variable frequency speed regulation to realize by blower fan, or realizes by other type voltage adjusting device.
Fig. 4 is the perspective view of process through converter semi-dry dust removal installation of the vertical wet cottrell of employing of one embodiment of the invention.As shown in Figure 4, the component names that Reference numeral wherein refers to is as follows:
41: high-temperature flue gas import; 42: dry type evaporative cooler; 421: transpiration cooling water inlet pipe; 422: atomizing medium transfer lime; 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: clean exhanst gas outlet; 47: mud or mud outlet; 48: dust-collecting pipe and polar curve.
In the present embodiment, this atomizing medium can be nitrogen or steam.This dry type evaporative cooler 304 has Direct spraying evaporation component, and this Direct spraying evaporation component comprises transpiration cooling water water inlet pipe 421 and atomizing medium transfer lime 422.In addition, the outlet flue gas of this dry type evaporative cooler 304 is connected with wet cottrell 305 by duct coupling 44.
Fig. 5 is the perspective view of process through converter semi-dry dust removal installation of the employing horizontal wet electrostatic precipitator of one embodiment of the invention.As shown in Figure 5, the component names that Reference numeral wherein refers to is identical with embodiment shown in Fig. 4, and just wet cottrell 45 changes into horizontally by vertical, and this adopts according to field condition, and other parts annexation is all identical.
Adopt the process through converter semi-dry dust removal installation of vertical wet cottrell embodiment illustrated in fig. 4 to carry out the data of dedusting as follows, the 120 tons of converters of take are example:
BOF nominal capacity: 120 tons
Import flue gas peak flow :～95,000Nm
3/ h
Input gas temperature: 700-1000 ℃
Import dust contained flue gas concentration: 70-200g/Nm
3
The transpiration cooling maximum spout water yield: 15-30t/h
Maximum total injection flow rate: 40-60t/h
The average new water yield: the 5-10t/h that supplements
Atomizing medium requirement: nitrogen 1000-1200Nm
3/ h, steam 3-5t/h
Exit gas temperature: 90-300 ℃ (according to field condition design)
Receive dry ash amount: 30-160g/Nm
3(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-removal system always hinders damage: 1-3kPa
Outlet dust contained flue gas concentration :≤10 or 1mg/Nm
3.
Adopt the process through converter semi-dry dust removal installation of horizontal wet electrostatic precipitator embodiment illustrated in fig. 5 to carry out the data of dedusting as follows, the 250 tons of converters of take are example:
BOF nominal capacity: 250 tons
Import flue gas peak flow :～170,000Nm
3/ h
Input gas temperature: 700-1000 ℃
Import dust contained flue gas concentration: 70-200g/Nm
3
The transpiration cooling maximum spout water yield: 40-65t/h
Maximum total injection flow rate: 80-110t/h
The average new water yield: the 8-15t/h that supplements
Atomizing medium requirement: nitrogen 1500-2000Nm
3/ h, steam 6-10t/h
Exit gas temperature: 90-300 ℃ (according to field condition design)
Receive dry ash amount: 30-160g/Nm
3(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-removal system always hinders damage: 1-3kPa
Outlet dust contained flue gas concentration :≤10 or 1mg/Nm
3.
The present invention adopts dry type evaporative cooler and wet cottrell by combination, can reduce the dust concentration of discharge flue gas and gas recovery, reduces the sewage load of washing dust, has reduced energy consumption.
In addition, of the present invention simple in structure and for ease of maintenaince, reduce venting of dust explosion hidden danger, stop dirty smoke directly ventilating and pollute, be applicable to newly-built converter dust-removing and adopt, be more specially adapted to the technological transformation to existing wet method and dry-dedusting system.
Although the present invention with preferred embodiment openly as above, it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible change and modification.Therefore, every content that does not depart from technical solution of the present invention, any modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, within all falling into the protection domain that the claims in the present invention define.
Claims (5)
1. a process through converter semi-dry dust removal installation (300), two ends are connected with a blower fan (309) with an evaporated flue (303) respectively, it is characterized in that, comprising:
Dry type evaporative cooler (304), is connected with described evaporated flue (303), for the cooling and thick dedusting of high-temperature flue gas;
Wet cottrell (305), is connected with described blower fan (309) with described dry type evaporative cooler (304) respectively, for smart dedusting and the demist of flue gas;
Dry dust outward transport equipment (306), is connected with described dry type evaporative cooler (304);
Circulating water treatment device (307), is connected with described wet cottrell (305); And
Mud or mud outward transport equipment (308), be connected with described circulating water treatment device (307).
2. process through converter semi-dry dust removal installation according to claim 1 (300), it is characterized in that, described dry type evaporative cooler (304) has Direct spraying evaporation component, and described Direct spraying evaporation component comprises transpiration cooling water water inlet pipe (421) and atomizing medium transfer lime (422).
3. process through converter semi-dry dust removal installation according to claim 1 (300), it is characterized in that, the outlet flue gas of described dry type evaporative cooler (304) is connected with described wet cottrell (305) by a duct coupling (44).
4. according to the process through converter semi-dry dust removal installation (300) described in claim 1 or 3, it is characterized in that, the quantity of described wet cottrell (305) is one group or many groups, adopts vertical or horizontal being arranged in outside Nei Huo workshop, workshop.
5. process through converter semi-dry dust removal installation according to claim 1 (300), is characterized in that, described blower fan (309) is one-time dedusting blower fan.
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| CN201210285496.2A CN103571993B (en) | 2012-08-10 | 2012-08-10 | Converter dust removal equipment through semidry method |
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| CN201210285496.2A CN103571993B (en) | 2012-08-10 | 2012-08-10 | Converter dust removal equipment through semidry method |
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| CN103571993B CN103571993B (en) | 2017-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JP2002292238A (en) * | 2001-03-30 | 2002-10-08 | Sumitomo Heavy Ind Ltd | Waste gas treatment system |
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| 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 |
| 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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2012
- 2012-08-10 CN CN201210285496.2A patent/CN103571993B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63297520A (en) * | 1987-05-29 | 1988-12-05 | Asahi Glass Co Ltd | Equipment for treating exhaust gas from metallurgical furnace |
| JP2002292238A (en) * | 2001-03-30 | 2002-10-08 | Sumitomo Heavy Ind Ltd | Waste gas treatment system |
| CN1480540A (en) * | 2002-09-04 | 2004-03-10 | 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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