CN101377386A - Metal smelting flue gas purification method - Google Patents
Metal smelting flue gas purification method Download PDFInfo
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- CN101377386A CN101377386A CNA2008102117866A CN200810211786A CN101377386A CN 101377386 A CN101377386 A CN 101377386A CN A2008102117866 A CNA2008102117866 A CN A2008102117866A CN 200810211786 A CN200810211786 A CN 200810211786A CN 101377386 A CN101377386 A CN 101377386A
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- dust
- flue gas
- cooling
- desulfurization
- purification method
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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 relates to a flue gas purification method in the technical field of metal smelting, which includes the cooling step, the filtering and dust collecting step and the desulfurization and dust removal step, wherein, in the cooling step, exhaust gases are discharged via a cooling device; in the filtering and dust collecting step, exhaust gases are discharged via a dust removal device; in the desulfurization and dust removal step, exhaust gases are discharged via a desulfurization and dust removal device. The cooling device can be a surface spraying cooler; the dust removal device can be a gas box type pulse bag dust collector; and the desulfurization and dust removal device can be a wet desulfurization dust remover. After the purification, no dust particles or unpleasant smell exist in the discharged gases, non-chimney direct emission is achieved, and the 'four no' emission target, i.e., no smoke, no dust, no smell and no chimney, is achieved.
Description
Technical field
The present invention relates to the flue gas purifying method in a kind of metal smelt, especially relate to a kind of flue gas purifying method in metallic copper is smelted.
Background technology
The smelting of metal smelt, particularly metallic copper, normally with ore successively by blast furnace, converter, refining furnace equipment such as (being anode furnace), obtain tenor at last at the product more than 99.2%.When anode furnace is smelted, in operating process such as reinforced, oxidation, reduction, slagging, can promptly can produce the technology flue gas from each operation mouth effusion black smoke and harmful gas, tail gas just, temperature can reach 1200 ℃, and the dustiness fluctuation is bigger, is generally 10mg/Nm
3About, particularly when the oxidation operation, then up to 30-60mg/Nm
3This smoke components is very complicated, usually contain pernicious gases such as valuable metals such as copper, zinc, tin and sulfur dioxide, sulfur trioxide, the way of metallurgy industry generally is directly to be discharged in the atmosphere, or through the directly discharging of simple cooling processing back, cause operating environment to worsen, therefore metallurgy industry seriously polluted to environment is unfavorable for the improvement of human ecological environment.
By the end of at present, though there is part enterprise desulfurating dust-removing equipment to be applied on the vent gas treatment of metal smelt, but still effect is bad, can not really play the purpose of nuisanceless processing, particularly can not play when realizing nuisanceless discharging, again the effect that kills two birds with one stone that the valuable metal in the flue gas, oxysulfide can be reclaimed.
Summary of the invention
The objective of the invention is to address the above problem, the flue gas purifying method in a kind of metal smelt is provided.
The object of the present invention is achieved like this:
A kind of metal smelting flue gas purification method, it comprises the cooling cooling step, filters gather dust step, desulfurization and dedusting step.
Described cooling cooling step is that tail gas is discharged by cooling device; The described filtration step of gathering dust is that tail gas is discharged by dust arrester; Described desulfurization and dedusting step is that tail gas is discharged by desulfation dust-extraction device.
Described cooling device can be surperficial trickle cooler.
Described dust arrester can be gas tank formula pulse packet deduster.
Described desulfation dust-extraction device can be wet type desulfurizing dust collector.
Above-mentioned surperficial trickle cooler, gas tank formula pulse band deduster, wet type desulfurizing dust collector are the existing equipment that can buy on the market.
In above-mentioned cooling cooling step, flue gas by the trickle cooling, can be reduced to high-temperature flue gas below 200 ℃, to satisfy the needs of next step during by surperficial trickle cooler.Flue gas does not directly contact with cooling medium, does not therefore change the character of flue gas.Adopt surperficial trickle cooling, can improve heat transfer coefficient, reduce film-cooled heat, thereby save investment cost.The more important thing is, under the coarse granule flue dust can deposit, reach the purpose of elementary dedusting in dust hopper.
In step is gathered dust in above-mentioned filtration, adopt gas tank formula pulse band deduster, its effect is can adopt locellus to carry out deashing in turn, promptly so-called online ash removal.When jetting deashing was carried out in a certain chamber, filtered airflow was cut off, and had avoided jetting deashing to produce the dust secondary fly-up, so dust-collecting efficiency up to 99.9%, and has prolonged service life of filter bag.Though the tail gas that at this moment ejects also has a small amount of micronic dust, dustiness has reached national desired discharge standard.
Tail gas behind the pulse bag filtration except that containing a small amount of micronic dust, still contains the gas that sulfur dioxide, sulfur trioxide etc. were harmful to, had flavor, is removed with wet type desulfurizing dust collector again.This wet type desulfurizing dust collector is the commercially available prod,, its adopts self-excitation water mist dust-removing principle, by whirlwind centrifugal dust-removing, dehydration, and the mode that combines of relevant chemical reaction, the purpose that reach high-effective dust-removing, eliminates smoke and remove gaseous contaminants such as sulfur dioxide.Its specific embodiment is: flue gas is impact liquid level at first, roll water curtain and swash and splash a large amount of foams and water droplet, enter then in the whirlwind washing chamber, gas, liquid fully collide, sulfur in smoke, sulfur trioxide and cleaning solution calcium hydroxide generation chemical reaction, generate the calcium sulfite crystal settling, discharge by chain type scraper Machine for cleaning-out ash, flue gas after being purified, discharging after centrifugal dehydration, at this moment both do not had micronic dust, yet free from extraneous odour in the waste gas, and can not have chimney and directly discharge, reached that waste gas is smokeless, dustless, tasteless, " four do not have " emissions object of no chimney.
The present invention is described further below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a device therefor schematic diagram of the present invention
The specific embodiment
Two 100 tons of metallic coppers are smelted the flue gas purifying method of anode furnace.In conjunction with the accompanying drawings 1, it comprises the cooling cooling step, filters gather dust step, desulfurization and dedusting step.
Described cooling cooling step is that tail gas is discharged by cooling device; The described filtration step of gathering dust is that tail gas is discharged by dust arrester; Described desulfurization and dedusting step is that tail gas is discharged by desulfation dust-extraction device.Described cooling device is surperficial trickle cooler 1.Described dust arrester is a gas tank formula pulse packet deduster 2, specifically, can adopt the PPCS type gas tank formula pulse packet deduster of U.S. Fu Le company.Described desulfation dust-extraction device is a wet type desulfurizing dust collector 3.Also have air-introduced machine 4, aiutage 5 in addition.Wherein surperficial trickle cooler 1, gas tank formula pulse packet deduster 2, wet type desulfurizing dust collector 3 are arranged in order by pipeline.
Cross range request for satisfying the anode furnace smelting process fully, can respectively dispose a cover flue gas purifying equipment by each anode furnace.
This flue gas purifying method is actually high-temperature flue gas is cooled to below 200 ℃ with surperficial trickle cooler, enter first order dedusting, it is dry type pulse packet deduster, cigarette in the flue gas, dirt are removed and reclaimed, enter second level dedusting again, promptly enter wet type desulfurizing dust collector, remove the atmosphere that enters up to standard behind sulfur in smoke, the sulfur trioxide.
The calculating of one, gas cleaning amount:
1, basic data:
Exhaust gas volumn: 22000N m
3/ h/ platform; Flue-gas temperature: (behind air preheater) 850 ℃
2, the calculating of the required heat transfer area of surperficial trickle cooler:
Flue gas is reduced to 200 ℃ through surperficial trickle cooler
Required heat transfer area is: F=Q/K Δ T by formula
In the formula: F is heat transfer area (m
2); The heat (KJ/h) of Q for leaving
Q＝22000[(1.59?x?850)-(1.3x200)]＝24013000KJ/h
K is that heat transfer coefficient is got 125.61KJ/m
2.h. ℃
Δ T is the temperature difference of flue gas and cooling medium, gets 50 ℃ of cooling water temperatures
F=24013000/125.61X (850-50)=239m then
2
3, the calculating of required pulse bag collector filter area
(1), exhaust gas volumn:
The exhaust gas volumn that enters pulse packet is 22000N m
3/ h/ platform
Be scaled 200 ℃ of operating mode exhaust gas volumns: 22000 (1+200/273)=38117m
3/ h/ platform or 635m
3/ min/ platform
(2), the rate of filtration of bag taking: 0.6m/min
So an anode furnace needs filter area: 635/0.6=1058m
2
3, enter the calculating of the exhaust gas volumn of devulcanizer:
Required processing cigarette amount: the temperature after the outlet of filter bag device has been reduced to 100 ℃, and the exhaust gas volumn that then enters devulcanizer is:
22000x (1+100/273)=30059m
3/ h/ platform
Two, each operation mouth dust removal by ventilation of anode furnace is metallurgical calculates
1, the exhaust air rate of an anode furnace charging aperture exhaust gas cabinet calculates
Refining furnace is established two of charging apertures, and its size is respectively: wide 1400mm, and high 800mm needs capacity (V) to be calculated as follows:
V＝μ0A0β
μ 0 is the average suction speed on the working hole in the formula, gets 1.5m/s
A0 is the working hole area: 1.4 x 0.8=1.12m
2
β is a safety coefficient, gets 1.1
V=1.5 x 1.12 x 1.1=1.85m then
3/ s per hour is 6660m
3/ h
The exhaust smoke level of two working holes: 6660 x 2=13320m
3/ h
2, the exhaust air rate of slag tap exhaust gas cabinet calculates
Slag tap de is of a size of 0.5 x 0.5m
Capacity is calculated as follows:
V＝μ0A0β
μ 0 is the average suction speed on the working hole in the formula, gets 1.5m/s
A0 is the working hole area: 0.5 x 0.5=0,25m
2
β is a safety coefficient, gets 1.1
V=1.5 x 0.25 x 1.1=0.41m then
3/ s per hour is 1476m
3/ h
Amounting to needs exhaust air rate: 13320+1476=14796m
3/ h or 246.6m
3/ min
3, dust removal by ventilation pulse packet dust-precipitator filter area (F) is calculated
Two anode furnace dust removal by ventilation flue gas total amounts: 14796 x 2=29592m
3/ h or 493.2m
3/ min the rate of filtration: 1m/min
F=493.2/1=493m then
2
4, go into the calculating of devulcanizer exhaust gas volumn:
The exhaust gas volumn of required processing: 25952m
3/ h
Three, being chosen as of main cleaning equipment:
Smoke treatment amount 22000N m
3/ h/ platform; Flue-gas temperature (behind air preheater) is 850 ℃;
Flue-gas temperature is finally reduced to below 200 ℃.Therefore need selection equipment to be:
(1), surperficial trickle cooler (film-cooled heat 280m
2) 2
(2), gas tank formula pulse band deduster (PPCS96-2 x 7 types) is 2
Filter area: F=1114m
2, the specification of filter bag: ∮ 130 x 2450, material: labor synthetic fibre Nomex, serviceability temperature are 210 ℃
(3), wet type desulfurizing dust collector (XSL-10t type) is 2
(4), air-introduced machine 6-26NO11.2D is 2
Performance: air quantity Q=36190m
3/ h, pressure P=7180pa, power 110kw
(5), 2 on water circulating pump: IZ (R) 100-200 type
Performance: flow Q=120 ton/time, lift H=47 rice, power 22kw
(6), flue gas pipe network system 2 covers
Through after purification, final tail gas is tested, the result shows, both do not had micronic dust, also free from extraneous odour in the waste gas of discharge, realized that no chimney directly discharges, and reaches that waste gas is smokeless, dustless, tasteless, " four nothings " emissions object of no chimney.
Claims (5)
1, a kind of metal smelting flue gas purification method is characterized in that, it comprises the cooling cooling step, filters gather dust step, desulfurization and dedusting step.
2, a kind of metal smelting flue gas purification method according to claim 1 is characterized in that, the cooling cooling step is that tail gas is discharged by cooling device; The filtration step of gathering dust is that tail gas is discharged by dust arrester; The desulfurization and dedusting step is that tail gas is discharged by desulfation dust-extraction device.
3, a kind of metal smelting flue gas purification method according to claim 2 is characterized in that, described cooling device is surperficial trickle cooler.
4, a kind of metal smelting flue gas purification method according to claim 2 is characterized in that, described dust arrester is a gas tank formula pulse packet deduster.
5, a kind of metal smelting flue gas purification method according to claim 2 is characterized in that, described desulfation dust-extraction device is a wet type desulfurizing dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102117866A CN101377386A (en) | 2008-09-25 | 2008-09-25 | Metal smelting flue gas purification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102117866A CN101377386A (en) | 2008-09-25 | 2008-09-25 | Metal smelting flue gas purification method |
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| Publication Number | Publication Date |
|---|---|
| CN101377386A true CN101377386A (en) | 2009-03-04 |
Family
ID=40421040
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|---|---|---|---|
| CNA2008102117866A Pending CN101377386A (en) | 2008-09-25 | 2008-09-25 | Metal smelting flue gas purification method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614761A (en) * | 2012-04-17 | 2012-08-01 | 武汉金源环保科技工程设备有限公司 | Glass coating waste gas treatment dry energy-saving process |
| CN103134336A (en) * | 2013-03-04 | 2013-06-05 | 中国瑞林工程技术有限公司 | Anode furnace smoke treatment system and method |
| CN103697708A (en) * | 2013-12-14 | 2014-04-02 | 苏州市新虞仪表成套设备有限公司 | Dust removal system for refining furnace |
| CN105289121A (en) * | 2015-10-31 | 2016-02-03 | 李勇 | Flue gas dust removing system |
| CN108970308A (en) * | 2018-07-04 | 2018-12-11 | 北京矿冶科技集团有限公司 | A kind of high-temp chlorination flue gas processing method containing gold |
| CN111363884A (en) * | 2020-04-15 | 2020-07-03 | 柯美瑞(唐山)环保科技有限公司 | Converter primary dust removal flue gas ultra-clean discharging equipment |
-
2008
- 2008-09-25 CN CNA2008102117866A patent/CN101377386A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614761A (en) * | 2012-04-17 | 2012-08-01 | 武汉金源环保科技工程设备有限公司 | Glass coating waste gas treatment dry energy-saving process |
| CN103134336A (en) * | 2013-03-04 | 2013-06-05 | 中国瑞林工程技术有限公司 | Anode furnace smoke treatment system and method |
| CN103134336B (en) * | 2013-03-04 | 2014-12-10 | 中国瑞林工程技术有限公司 | Anode furnace smoke treatment system and method |
| CN103697708A (en) * | 2013-12-14 | 2014-04-02 | 苏州市新虞仪表成套设备有限公司 | Dust removal system for refining furnace |
| CN105289121A (en) * | 2015-10-31 | 2016-02-03 | 李勇 | Flue gas dust removing system |
| CN108970308A (en) * | 2018-07-04 | 2018-12-11 | 北京矿冶科技集团有限公司 | A kind of high-temp chlorination flue gas processing method containing gold |
| CN111363884A (en) * | 2020-04-15 | 2020-07-03 | 柯美瑞(唐山)环保科技有限公司 | Converter primary dust removal flue gas ultra-clean discharging equipment |
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Open date: 20090304 |