CN102373312B - Primary fume dry method dedusting system of vanadium recovery converter - Google Patents

Primary fume dry method dedusting system of vanadium recovery converter Download PDF

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Publication number
CN102373312B
CN102373312B CN2011103370774A CN201110337077A CN102373312B CN 102373312 B CN102373312 B CN 102373312B CN 2011103370774 A CN2011103370774 A CN 2011103370774A CN 201110337077 A CN201110337077 A CN 201110337077A CN 102373312 B CN102373312 B CN 102373312B
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China
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ash
flue
unloading tube
input aperture
cooling tower
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CN2011103370774A
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Chinese (zh)
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CN102373312A (en
Inventor
纪世昌
王亮
邵远敬
葛雷
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中冶南方工程技术有限公司
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Priority to CN2011103370774A priority Critical patent/CN102373312B/en
Publication of CN102373312A publication Critical patent/CN102373312A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention relates to a primary fume dry method dedusting system of a vanadium recovery converter, which is characterized by comprising an evaporative cooling tower, a first fume pipeline, a high temperature bag-type dust collector, a Venturi flowmeter, a second fume pipeline, a draught fan, a third fume pipeline, a muffler, a fourth fume pipeline and a vent stack; high temperature fume generated at the mouth of the vanadium recovery converter enters the evaporative cooling tower through being cooled by an evaporative cooling flue, a fume outlet of the evaporative cooling tower is communicated with a fume inlet of the high temperature bag-type dust collector through the first fume pipeline; an outlet of the draught fan is connected with an inlet of the muffler through the third fume pipeline; and an outlet of the muffler is connected with an inlet of the vent stack through the fourth fume pipeline. The system can operate safely, and can make the content of dust in the discharged fume less than or equal to 15 mg/Nm<3>.

Description

Flue gas dry-process dust removal system of a kind of converter extracting vanadium
Technical field
The present invention relates to flue gas dry-process dust removal system of a kind of converter extracting vanadium.
Background technology
The converter extracting vanadium main task is: the one, and vanadium-bearing hot metal is blown into high-carbon content and satisfy the half steel of next step steel-making requirements; The 2nd, make the vanadium oxidation in molten iron it enter vanadium slag to greatest extent.By the technique of converter extracting vanadium as can be known, the flue gas that converter extracting vanadium produces does not have recovery value because carbon monoxide concentration is lower, therefore guaranteeing the dust content emission compliance, and guaranteeing under the prerequisite of security of system, need consider to utilize the energy in flue gas, and accomplish water-saving and electricity-saving as far as possible.
Flue gas dry-process dust removing process of converter extracting vanadium of the present invention just in time satisfies this requirement.
Summary of the invention
The object of the present invention is to provide flue gas dry-process dust removal system of a kind of converter extracting vanadium, this system's energy safe operation can make dust content≤15mg/Nm in the discharging flue gas 3
to achieve these goals, technical scheme of the present invention is: flue gas dry-process dust removal system of a kind of converter extracting vanadium, it is characterized in that it comprises wet cooling tower 3, the first flue 4, high temperature cloth bag dust collector 5, venturi meter 6, the second flue 7, induced draft fan 8, the 3rd flue 9, sourdine 10, the 4th flue 11, diffusing chimney 12, cinder ash-unloading tube 13, the first pneumatic gate valve 14, the first pneumatic double-layer flap valve 15, cinder storehouse 16, the first scraper ash-transmission machine 17, the second pneumatic gate valve 18, the second pneumatic double-layer flap valve 19, the first thin grey ash-unloading tube 20, accident pneumatic gate valve 21, accident ash-unloading tube 22, the second scraper ash-transmission machine 23, the second thin grey ash-unloading tube 24, spiral ash machine 25, chapelet 26, the 3rd thin grey ash-unloading tube 27, thin ash silo 28,
The high-temperature flue gas that converter extracting vanadium fire door place produces enters in wet cooling tower 3 (entrance of wet cooling tower 3 is connected with the outlet of gasification cooling flue 2) through gasification cooling flue is cooling, is provided with the double-flow spray gun system (two-fluid aerosol spray gun) as atomization droplet evaporation cooled flue gas in wet cooling tower 3; The exhanst gas outlet of wet cooling tower 3 is connected by the flue gas input aperture of the first flue 4 and high temperature cloth bag dust collector 5; The exhanst gas outlet of high temperature cloth bag dust collector 5 is equipped with venturi meter 6; Venturi meter 6 is connected by the second flue 7 with the input aperture of induced draft fan 8; The delivery port of induced draft fan 8 is connected by the 3rd flue 9 with the input aperture of sourdine 10; The delivery port of sourdine 10 is connected by the 4th flue 11 with the input aperture of diffusing chimney 13;
Nitrogen induction apparatus (directly being connected with diffusing chimney) and portfire are installed on diffusing chimney 12; The bottom ash output hole of wet cooling tower 3 is connected by cinder ash-unloading tube 13 with the input aperture in cinder storehouse 16, and the first pneumatic gate valve 14 and the first pneumatic double-layer flap valve 15 are installed on cinder ash-unloading tube 13; Be provided with the first scraper ash-transmission machine 17 below the outlet of high temperature cloth bag dust collector 5, the normal ash output hole of the first scraper ash-transmission machine 17 is connected by the first thin grey ash-unloading tube 20 with the input aperture of scraper ash-transmission machine 23, and the second pneumatic gate valve 18 and the second pneumatic double-layer flap valve 19 are installed on the first thin grey ash-unloading tube 20; The urgent ash output hole of the first scraper ash-transmission machine 17 is connected by accident ash-unloading tube 22 with the accident ash silo, and accident pneumatic gate valve 21 is installed on accident ash-unloading tube 22; The delivery port of scraper ash-transmission machine 23 is connected by the second thin grey ash-unloading tube 24 with the input aperture of spiral ash machine 25; The delivery port of spiral ash machine 25 directly is connected with the input aperture of chapelet 26; The delivery port of chapelet 26 is connected by the 3rd thin grey ash-unloading tube 27 with thin ash silo 28.
The present invention has following beneficial effect: because it has adopted the thick dedusting of wet cooling tower, the dedusting of high temperature cloth bag dust collector essence, can guarantee kind of dust≤15mg/Nm 3, far below the national requirements emission standard; Because system adopts evaporating cooling, can save a large amount of water coolants simultaneously, not have secondary pollution and sewage disposal; And system simplification, floor space is little, is convenient to administer and maintain.The dry method system of electrostatic precipitator is used in contrast, is the high temperature cloth bag dust collector due to what use, has definitely avoided system's blast, can guarantee system safety operation.
Description of drawings
Fig. 1 is the structure iron of system of the present invention;
in figure: the 1-converter extracting vanadium, the 2-gasification cooling flue, the 3-wet cooling tower, 4-the first flue, 5-high temperature cloth bag dust collector, the 6-venturi meter, 7-the second flue, the 8-induced draft fan, 9-the 3rd flue, the 10-sourdine, 11-the 4th flue, the 12-diffusing chimney, 13-cinder ash-unloading tube, 14-the first pneumatic gate valve, the pneumatic double-layer flap valve of 15-first, 16-cinder storehouse, 17-the first scraper ash-transmission machine, 18-the second pneumatic gate valve, the pneumatic double-layer flap valve of 19-second, the thin grey ash-unloading tube of 20-first, 21-accident pneumatic gate valve, 22-accident ash-unloading tube, 23-the second scraper ash-transmission machine, the thin grey ash-unloading tube of 24-second, the 25-spiral ash machine, the 26-chapelet, the thin grey ash-unloading tube of 27-the 3rd, the thin ash silo of 28-.(annotating: do not comprise converter extracting vanadium 1, gasification cooling flue 2 in flue gas dry-process dust removal system of converter extracting vanadium)
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
as shown in Figure 1, flue gas dry-process dust removal system of converter extracting vanadium, it comprises wet cooling tower 3, the first flue 4, high temperature cloth bag dust collector 5, venturi meter 6, the second flue 7, induced draft fan 8, the 3rd flue 9, sourdine 10, the 4th flue 11, diffusing chimney 12, cinder ash-unloading tube 13, the first pneumatic gate valve 14, the first pneumatic double-layer flap valve 15, cinder storehouse 16, the first scraper ash-transmission machine 17, the second pneumatic gate valve 18, the second pneumatic double-layer flap valve 19, the first thin grey ash-unloading tube 20, accident pneumatic gate valve 21, accident ash-unloading tube 22, the second scraper ash-transmission machine 23, the second thin grey ash-unloading tube 24, spiral ash machine 25, chapelet 26, the 3rd thin grey ash-unloading tube 27, thin ash silo 28,
The high-temperature flue gas that converter extracting vanadium fire door place produces enters in wet cooling tower 3 (entrance of wet cooling tower 3 is connected with the outlet of gasification cooling flue 2) through gasification cooling flue is cooling, is provided with the double-flow spray gun system (two-fluid aerosol spray gun) as atomization droplet evaporation cooled flue gas in wet cooling tower 3; The exhanst gas outlet of wet cooling tower 3 is connected by the flue gas input aperture of the first flue 4 and high temperature cloth bag dust collector 5; The exhanst gas outlet of high temperature cloth bag dust collector 5 is equipped with venturi meter 6; Venturi meter 6 is connected by the second flue 7 with the input aperture of induced draft fan 8; The delivery port of induced draft fan 8 is connected by the 3rd flue 9 with the input aperture of sourdine 10; The delivery port of sourdine 10 is connected by the 4th flue 11 with the input aperture of diffusing chimney 13;
Nitrogen induction apparatus (directly being connected with diffusing chimney) and portfire are installed on diffusing chimney 12; The bottom ash output hole of wet cooling tower 3 is connected by cinder ash-unloading tube 13 with the input aperture in cinder storehouse 16, and the first pneumatic gate valve 14 and the first pneumatic double-layer flap valve 15 are installed on cinder ash-unloading tube 13; Be provided with the first scraper ash-transmission machine 17 below the outlet of high temperature cloth bag dust collector 5, the normal ash output hole of the first scraper ash-transmission machine 17 is connected by the first thin grey ash-unloading tube 20 with the input aperture of scraper ash-transmission machine 23, and the second pneumatic gate valve 18 and the second pneumatic double-layer flap valve 19 are installed on the first thin grey ash-unloading tube 20; The urgent ash output hole of the first scraper ash-transmission machine 17 is connected by accident ash-unloading tube 22 with the accident ash silo, and accident pneumatic gate valve 21 is installed on accident ash-unloading tube 22; The delivery port of scraper ash-transmission machine 23 is connected by the second thin grey ash-unloading tube 24 with the input aperture of spiral ash machine 25; The delivery port of spiral ash machine 25 directly is connected with the input aperture of chapelet 26; The delivery port of chapelet 26 is connected by the 3rd thin grey ash-unloading tube 27 with thin ash silo 28.
As shown in Figure 1, flue gas dry-process dust removing process of converter extracting vanadium, it comprises the steps:
1) flue gas of 1450 ℃ of high temperature dusts of converter extracting vanadium 1 fire door place's generation is cooled to 880-920 ℃ through gasification cooling flue 2, enters wet cooling tower 3;
2) in wet cooling tower 3, the atomized water drop of the flue gas of dust-laden and double-flow spray gun system (two-fluid aerosol spray gun) ejection comes in contact formula heat exchange (composition of atomizing droplet is the clean recirculated water of industry), for guaranteeing flue gas and the abundant heat exchange of atomized water drop, the residence time of the flue gas of dust-laden in wet cooling tower 3 is no less than 4 seconds (being generally 4~6 seconds);
Pass through gravity and centrifugal action in wet cooling tower 3 bottoms carry out thick dedusting to the flue gas of dust-laden, temperature at wet cooling tower 3 outlet flue gases is reduced to 248~252 ℃ (the best is 250 ℃), and the flue gas of process cooling, thick dedusting enters into high temperature cloth bag dust collector 5 through the first flue 4;
3) in high temperature cloth bag dust collector 5, the flue gas of dust-laden is by smart dedusting, the dust content≤15mg/Nm of the outlet of high temperature cloth bag dust collector 3, the filtrate that uses in the high temperature cloth bag dust collector requires: 204 ℃ of long-term heatproofs, and 240 ℃ of instantaneous heatproofs, acid and alkali-resistance, resistant to hydrolysis performance are good; After the smart dedusting of high temperature cloth bag dust collector 5, flue gas enters in induced draft fan 8 through Wen's flowmeter for pipe 6 and the second flue 7;
The indication acid and alkali-resistance refers to can anti-similar carbonic acid and the weak acid alkaline matter such as sodium carbonate; The index of resistant to hydrolysis performance is for requiring its coefficient of softening greater than 0.85, represents with the coefficient of softening K of material; K=fw (w is subscript)/f
In formula: the ultimate compression strength of fw---material under saturated-water phase, MPa;
The ultimate compression strength of f---material under drying regime, MPa;
4) induced draft fan 8 is power resources of dry-dedusting system, flue gas is pressurized in induced draft fan 8, the induced draft fan air quantity is to be controlled by flow director and fire door differential pressure controller synthesis, enters into sourdine 10 through flue gas after pressurization through the 3rd flue 9 in induced draft fan 8;
5) carry out noise reduction process at the interior high speed flue gas to induced draft fan 8 exits generations of sourdine 10, require sourdine sound-damping qualities 〉=35dB (A), then enter into diffusing chimney 12 through the 4th flue 11;
6) at diffusing chimney 12 tops (top of diffusing chimney is provided with ignition burning device), flue gas is through ignition, and the flue gas after burning is disposed in atmosphere, and during discharging, dust contained flue gas concentration has reached discharging standards≤15mg/Nm 3(experiment detects proof dust contained flue gas concentration≤15mg/Nm 3); If (this set(ting)value is 75000Nm less than set(ting)value for induced draft fan 8 tripping operations or flue gas flow in the oxygen blast process of converter extracting vanadium 3/ h) more than lasting 10 seconds, (the nitrogen induction apparatus is arranged on diffusing chimney to open immediately the nitrogen induction apparatus, directly be connected with diffusing chimney), nitrogen must inject diffusing chimney by the nitrogen induction apparatus immediately, to discharge the remaining flue gas of whole dust-removal system;
7) at the bottom of wet cooling tower 3 ash output hole, being removed temperature is that the cinder of 248~252 ℃ (the best is 250 ℃) is fallen in cinder storehouse 16 through cinder ash-unloading tube 13, the first pneumatic gate valve 14 and the first pneumatic double-layer flap valve 15 of playing the effect of lock gas;
The first class device is installed on the bulkhead in cinder storehouse 16, and periodically opens, the cycle is: opened 10 seconds, and closed the cycle of 600 seconds, prevent that cinder storehouse 16 interior dusts from hardening; The bottom in cinder storehouse 16 is equipped with the first star-shaped ash unloading valve, and when reaching high charge level, the first star-shaped ash unloading valve starts and begins to unload ash; The dust that reclaims can continue to serve as the raw material of smelting; For guaranteeing to unload ash smoothly, the first simple and easy sack cleaner and the first vacuum release valve are equipped with in 16 top in the cinder storehouse;
8) interior at high temperature cloth bag dust collector 5 is the thin grey through the first scraper ash-transmission machine 17 below the outlet of high temperature cloth bag dust collector of 248~252 ℃ (the best is 250 ℃) except lower temperature, and thin ash is sent to the outside of high temperature cloth bag dust collector; Afterwards under normal circumstances, thin ash drops down onto by the first thin grey ash-unloading tube 20, the second pneumatic gate valve 18 and the second pneumatic double-layer flap valve 19 of playing the effect of lock gas and scrapes the second plate cinder conveyer 23, then be transported to spiral ash machine 25 through the second thin grey ash-unloading tube 24, finally by being transported to thin ash silo 28 by chapelet 26 and the 3rd thin grey ash-unloading tube 27; In the state of accident, thin ash drops down onto in the accident ash silo by accident pneumatic gate valve 21 and accident ash-unloading tube 22;
On the bulkhead of thin ash silo 28, the second gasifying device is installed, and periodically opens, the cycle is: opened 60 seconds, and closed the cycle of 600 seconds, prevent that the dust in thin ash silo 28 from hardening; Thin ash silo 28 bottoms are equipped with the second star-shaped ash unloading valve, and when reaching high charge level, the second star-shaped ash unloading valve starts and begins to unload ash; The dust that reclaims can continue to serve as the raw material of smelting; For guaranteeing to unload ash smoothly, at the top of thin ash silo 28, the second simple and easy sack cleaner and the second vacuum release valve are housed.
Through 10 experiments, system safety operation is in good shape.
Step 4) in by the control of induced draft fan air quantity being realized the control to flue gas flow:
For flue gas flow (being the induced draft fan air quantity) controller: when the oxygen rifle of converter extracting vanadium (1) was in the state of cutting out, the flue gas air quantity set(ting)value of different steps directly was set as the per-cent of rated value, sees the following form:
When the oxygen rifle is in opened condition, the flue gas air quantity set(ting)value is set as the formula relevant to blowing oxygen quantity, formula is: flue gas flow set(ting)value=(oxygen flow x2.1438)+petticoat pipe pressure controller output (oxygen flow when oxygen flow refers to the converter oxygen gun oxygen blast, the petticoat pipe pressure controller refers to the movable gas hood at converter mouth place); In the oxygen blast stage when adding flux, set-point calculation is as follows: flue gas flow setting point=(oxygen flow x2.1438x1.07)+petticoat pipe pressure controller output, the output stream value scope of petticoat pipe pressure controller is-25,000Nm 3/ h~+ 25,000Nm3/h.

Claims (1)

1. flue gas dry-process dust removal system of a converter extracting vanadium, it is characterized in that it comprises wet cooling tower (3), the first flue (4), high temperature cloth bag dust collector (5), venturi meter (6), the second flue (7), induced draft fan (8), the 3rd flue (9), sourdine (10), the 4th flue (11), diffusing chimney (12), cinder ash-unloading tube (13), the first pneumatic gate valve (14), the first pneumatic double-layer flap valve (15), cinder storehouse (16), the first scraper ash-transmission machine (17), the second pneumatic gate valve (18), the second pneumatic double-layer flap valve (19), the first thin grey ash-unloading tube (20), accident pneumatic gate valve (21), accident ash-unloading tube (22), the second scraper ash-transmission machine (23), the second thin grey ash-unloading tube (24), spiral ash machine (25), chapelet (26), the 3rd thin grey ash-unloading tube (27), thin ash silo (28),
The high-temperature flue gas that converter extracting vanadium fire door place produces enters in wet cooling tower (3) through gasification cooling flue is cooling, is provided with the double-flow spray gun system as atomization droplet evaporation cooled flue gas in wet cooling tower (3); The exhanst gas outlet of wet cooling tower (3) is connected by the flue gas input aperture of the first flue (4) and high temperature cloth bag dust collector (5); The exhanst gas outlet of high temperature cloth bag dust collector (5) is equipped with venturi meter (6); Venturi meter (6) is connected by the second flue (7) with the input aperture of induced draft fan (8); The delivery port of induced draft fan (8) is connected by the 3rd flue (9) with the input aperture of sourdine (10); The delivery port of sourdine (10) is connected by the 4th flue (11) with the input aperture of diffusing chimney (12);
Diffusing chimney is equipped with nitrogen induction apparatus and portfire on (12); The bottom ash output hole of wet cooling tower (3) is connected by cinder ash-unloading tube (13) with the input aperture in cinder storehouse (16), and the first pneumatic gate valve (14) and the first pneumatic double-layer flap valve (15) are installed on cinder ash-unloading tube (13); Be provided with the first scraper ash-transmission machine (17) below the outlet of high temperature cloth bag dust collector (5), the normal ash output hole of the first scraper ash-transmission machine (17) is connected by the first thin grey ash-unloading tube (20) with the input aperture of scraper ash-transmission machine (23), and the second pneumatic gate valve (18) and the second pneumatic double-layer flap valve (19) are installed on the first thin grey ash-unloading tube (20); The urgent ash output hole of the first scraper ash-transmission machine (17) is connected by accident ash-unloading tube (22) with the accident ash silo, and accident pneumatic gate valve (21) is installed on accident ash-unloading tube (22); The delivery port of scraper ash-transmission machine (23) is connected by the second thin grey ash-unloading tube (24) with the input aperture of spiral ash machine (25); The delivery port of spiral ash machine (25) directly is connected with the input aperture of chapelet (26); The delivery port of chapelet (26) is connected by the 3rd thin grey ash-unloading tube (27) with thin ash silo (28).
CN2011103370774A 2011-10-31 2011-10-31 Primary fume dry method dedusting system of vanadium recovery converter CN102373312B (en)

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Publication number Priority date Publication date Assignee Title
CN103333982B (en) * 2013-06-28 2014-12-17 中冶南方工程技术有限公司 Converter primary exhaust gas dry dedusting coarse ash pneumatic conveying method
CN103332458B (en) * 2013-06-28 2015-09-02 中冶南方工程技术有限公司 The thin grey air-transport system of a kind of dry dedusting of converter
CN103388046B (en) * 2013-06-28 2015-04-01 中冶南方工程技术有限公司 Pneumatic transmission method for dry dedusting of fine ash in converter gas
CN103332490B (en) * 2013-06-28 2015-06-17 中冶南方工程技术有限公司 Converter gas dry dedusting fine dust pneumatic transport system
CN103333984B (en) * 2013-06-28 2014-12-17 中冶南方工程技术有限公司 Converter primary exhaust gas dry dedusting coarse ash pneumatic conveying system
CN103333985B (en) * 2013-06-28 2014-12-17 中冶南方工程技术有限公司 Converter gas dry dedusting coarse ash pneumatic conveying system
CN103388045B (en) * 2013-06-28 2015-04-01 中冶南方工程技术有限公司 Pneumatic transmission system for dry dedusting of thick ash in converter gas

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