CN101906505A - Converter gas purification and waste heat reclamation method - Google Patents
Converter gas purification and waste heat reclamation method Download PDFInfo
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- CN101906505A CN101906505A CN2010102191397A CN201010219139A CN101906505A CN 101906505 A CN101906505 A CN 101906505A CN 2010102191397 A CN2010102191397 A CN 2010102191397A CN 201010219139 A CN201010219139 A CN 201010219139A CN 101906505 A CN101906505 A CN 101906505A
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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
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Abstract
The invention relates to a converter gas purification and waste heat reclamation method. After high-temperature smoke of 1,800 to 2,000 DEG C from a converter passes through a movable skirt, a fixed smoke hood and an evaporation cooling flue, the temperature is reduced to 550 to 650 DEG C; and then the high-temperature smoke of 550 to 650 DEG C is purified by a high-temperature resistant pulse bag type dust collector to obtain clean gas at the temperature of between 500 and 600 DEG C, the clean gas enters a waste heat boiler, gas of 150 to 200 DEG C is obtained by heat exchange of the waste heat boiler, and the gas is conveyed to a gas and steam generating device through a fan to burn and generate electricity. Compared with the prior art, the method has the advantages that: the waste heat boiler can keep stable heat exchange effect, the heat energy and the pressure energy of the evaporation cooling flue and the waste heat boiler can be converted into electrical energy, convenient use is brought to a user, and the sensible heat of the converter gas is fully utilized because the high-temperature gas after passing through the waste heat boiler continuously enters the gas and steam generating device.
Description
Technical field
The present invention relates to a kind of industrial furnace flue gas and handle and the waste heat recovery field, especially relate to a kind of converter gas purification of Steel Plant's convertor steelmaking process and method of waste heat recovery of being used for.
Background technology
Converter is a kind of main steelmaking equipment of Steel Plant, and the interior molten iron of stove generates a large amount of ash-laden gass with the oxygen chemical reaction that is blown in the Converter Oxigen Blowing smelting process, about 1400～1600 ℃ of its temperature, and CO content is up to 90%, runs into air and burns immediately.Furnace gas plug for outlet ingress of air, partly or entirely the gas after the burning is called flue gas, and flue-gas temperature further improves on the basis of furnace gas, and when furnace gas perfect combustion, flue-gas temperature can reach more than 2600 ℃.At present the Iron And Steel Industry method of not firing commonly used is handled converter gas, promptly utilize the converter top can lifting movable skirt cover furnace gas contact with air as far as possible, and utilize the rate of air sucked in required setting device to suppress furnace gas and lack as far as possible and burn, and then flue gas is handled.In the case, the converter gas dustiness is about 80～150g/Nm
3, about 1800～2000 ℃ of flue-gas temperature.Clean gas after the purifying treatment is called coal gas of converter, its CO content about 60%.
Converter current gas cleaning and waste heat recovery have wet method and dry method dual mode: representative converter gas wet purification and residual neat recovering system by movable skirt cover, fixedly petticoat pipe, gasification cooling flue, the manual adjustable Venturi meter of one-level, secondary Venturi meter, water trap, blower fan, gas chamber, diffuse tower etc. and form; And representative converter gas dry cleaning and residual neat recovering system by movable gas hood, fixedly petticoat pipe, gasification cooling flue, wet cooling tower, electric precipitator, blower fan, diffuse tower, cooling tower, gas chamber etc. and form.Converter gas temperature behind gasification cooling flue is about 1000 ℃.From the above: to the processing of converter gas, no matter be wet method or dry method, the about 1000 ℃ of high-temperature flue gas that come out from gasification cooling flue all are forced to be cooled to normal temperature coal gas about 20 ℃ the gas chamber, a large amount of obvious heat of smoke is wasted, and has increased the investment and the working cost of flue gas cooling device simultaneously.In addition, the steam that reclaims by gasification cooling flue usually emits because of under-utilized, has also wasted the energy.For the two-stage venturi scrubber, its pressure-losses is up to 15000Pa, and its outlet coal gas dust content is still up to 100mg/Nm
3, must be through further dedusting to 10mg/Nm
3Below, coal gas could be used by the user, so this kind dedusting method energy consumption height, and udst separation efficient is low.For electric precipitator, because its preposition evaporative cooler increases the flue gas water content greatly, hang up moist dust on electric precipitator internal polar plate and the polar curve thereby make, cause efficiency of dust collection low, outlet coal gas dust content does not reach user's service requirements.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of purification efficiency sensible heat high and stable, converter gas to obtain the converter gas purification that utilizes completely and the method for waste heat recovery in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
The method of a kind of converter gas purification and waste heat recovery, it is characterized in that, this method may further comprise the steps: 1800～2000 ℃ the high-temperature flue gas that comes out from converter, through movable skirt cover, fixedly temperature is reduced to 550～650 ℃ behind petticoat pipe and the gasification cooling flue, then 550～650 ℃ high-temperature flue gas is purified through resistant to elevated temperatures pulse bag type dust collector, the clean coal gas that obtains temperature and be 500～600 ℃ enters waste heat boiler, and the coal gas that obtains 150～200 ℃ through residual heat boiler for exchanging heat is delivered to combustion gas and steam electric power generator combustion power generation through blower fan.
The heat-eliminating medium that described gasification cooling flue and waste heat boiler adopt is the industrial pure water after the deoxygenation, this industrial pure water is converted to high temperature and high pressure steam after heat exchange, enter turbo-generator generating then, the low temperature and low pressure steam that comes out from turbo-generator is delivered to the water inlet of gasification cooling flue and waste heat boiler heating gasification cooling flue and waste heat boiler.
Flue gas flow rate 25～50m/s in the described gasification cooling flue, therefore dust stratification not in the flue can keep stable heat exchange effect.
Described pulse bag type dust collector is by deashing device, upper box, air outlet, middle casing, card, filter bag, flow deflector, blast inlet and ash bucket are formed, described deashing device is located in the upper box, described air outlet is located at a side of upper box, casing is connected with upper box by card in described, described filter bag is located in the middle casing, described flow deflector is located at a side of filter bag, described blast inlet is located at ash bucket top, described ash bucket is located at the bottom of this fly-ash separator, use the pressure-losses of this pulse bag type dust collector rear pass gas to be lower than 1000Pa, the exit gas dust content ,≤10mg/Nm
3, the dedusting ash that this pulse bag type dust collector is collected is a dry ash, can utilize once more.
The making material of described filter bag is a Stainless Steel Fibre sintering felt, but 550～650 ℃ of heatproofs.
The making material of described card is a stainless steel, but 550～650 ℃ of heatproofs.
Medium is clean coal gas in the described waste heat boiler, and the boiler heat-transfer surface does not have dust, thereby the heat exchange effect stability, the trouble of having avoided ash-laden gas waste heat boiler deashing to bring simultaneously.
Compared with prior art, the present invention has the following advantages: adopt pulse bag type dust collector dry cleaning converter gas, purification efficiency is high and stable, the coal gas dust content≤10mg/Nm after the purification
3Can directly use, before waste heat boiler, earlier flue gas is purified, make waste heat boiler can keep stable heat exchange effect, the heat energy of gasification cooling flue and waste heat boiler and pressure can be converted into electric energy, the user is easy to use, coal gas of high temperature behind the waste heat boiler continues to enter combustion gas and steam electric power generator, its sensible heat is utilized fully, the water inlet that the low-pressure low-temperature steam that comes out from turbo-generator can be used to heat gasification cooling flue and waste heat boiler, thereby the surface heat of each equipment lost on above-mentioned operational path, the sensible heat of converter gas had obtained utilizing completely.
Description of drawings
Fig. 1 is a schema of the present invention;
Fig. 2 is the structural representation of pulse bag type dust collector;
Fig. 3 is the structural representation of deashing device.
1 is that deashing device, 2 is that upper box, 3 is that card, 4 is that filter bag, 5 is that flow deflector, 6 is that middle casing, 7 is that ash bucket, 8 is that blast inlet, 9 is that air outlet, 10 is that pulse valve, 11 is that gas bag, 12 is to jet to manage among the figure.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment 1
The method of a kind of converter gas purification and waste heat recovery, its operational path is as follows: 2000 ℃ the high-temperature flue gas that comes out from converter, through movable skirt cover, fixedly behind petticoat pipe and the gasification cooling flue, its temperature is reduced to 600 ℃, flue gas flow rate 35m/s in the gasification cooling flue, therefore dust stratification not in the flue can keep stable heat exchange effect.600 ℃ high-temperature flue gas is after resistant to elevated temperatures pulse bag type dust collector purifies, temperature is reduced to 550 ℃ clean coal gas and is entered waste heat boiler, the boiler heat-transfer surface does not have dust, thereby heat exchange effect stability, the trouble of having avoided ash-laden gas waste heat boiler deashing to bring simultaneously, the coal gas that obtains temperature after the heat exchange and be 180 ℃ is delivered to combustion gas and steam electric power generator combustion power generation through blower fan.This pulse bag type dust collector pressure-losses is lower than 1000Pa, exit gas dust content≤10mg/Nm
3, the dedusting ash of collection is a dry ash, can utilize once more.Industrial pure water delivers to gasification cooling flue after deoxygenation and waste heat boiler is converted to high temperature and high pressure steam, enters the turbo-generator generating then; Deliver to gasification cooling flue and waste heat boiler continuation utilization from the low-temp low-pressure steam that turbo-generator comes out.
The structure of pulse bag type dust collector as shown in Figure 2, form by deashing device 1, upper box 2, card 3, filter bag 4, flow deflector 5, middle casing 6, ash bucket 7, blast inlet 8, air outlet 9, deashing device 1 is located in the upper box 2, this deashing device 1 is that the pulse valve 10 of ZL200720074665.2 and application number are 200810033951.3 winding-up pipe 12 by the patent No. of my company invention, connect through gas bag combination 11, pulse valve 10 is located at the top of gas bag 11, winding-up pipe 12 is connected with the bottom of gas bag 11, as shown in Figure 3.Adopt computer the fly-ash separator interior flow field to be carried out determining after the numerical evaluation again the structure and the installation site of fly-ash separator internal structure and flow deflector 5.Air outlet 9 is located at a side of upper box 2, and middle casing 6 is connected with upper box 2 by card 3, and the making material of card is a stainless steel, but 650 ℃ of heatproofs.In the casing 6, the making material of filter bag 4 was a Stainless Steel Fibre sintering felt during filter bag 4 was located at, but 650 ℃ of heatproofs, flow deflector 5 is located at a side of filter bag 4, and 8 blast inlets are located at middle casing 6 bottoms, and ash bucket 7 is located at bottom this fly-ash separator.Flow deflector guiding dust-contained airflow flows downward, and crude particle dust wherein falls into ash bucket, and the air-flow of removing crude particle dust then is folded to and enters the filter bag filtration uniformly.
Embodiment 2
1800 ℃ the high-temperature flue gas that comes out from converter, through movable skirt cover, fixedly temperature is reduced to 550 ℃ behind petticoat pipe and the gasification cooling flue, flue gas flow rate is 25m/s in the gasification cooling flue, then 550 ℃ high-temperature flue gas is purified through resistant to elevated temperatures pulse bag type dust collector, the clean coal gas that obtains temperature and be 500 ℃ enters waste heat boiler, the coal gas that obtains 150 ℃ through residual heat boiler for exchanging heat is delivered to combustion gas and steam electric power generator combustion power generation through blower fan, and employed method and each assembly are identical with embodiment 1.
2000 ℃ the high-temperature flue gas that comes out from converter, through movable skirt cover, fixedly temperature is reduced to 650 ℃ behind petticoat pipe and the gasification cooling flue, flue gas flow rate is 50m/s in the gasification cooling flue, then 650 ℃ high-temperature flue gas is purified through resistant to elevated temperatures pulse bag type dust collector, the clean coal gas that obtains temperature and be 600 ℃ enters waste heat boiler, the coal gas that obtains 200 ℃ through residual heat boiler for exchanging heat is delivered to combustion gas and steam electric power generator combustion power generation through blower fan, and employed method and each assembly are identical with embodiment 1.
Claims (6)
1. the method for converter gas purification and waste heat recovery, it is characterized in that, this method may further comprise the steps: 1800～2000 ℃ the high-temperature flue gas that comes out from converter, through movable skirt cover, fixedly temperature is reduced to 550～650 ℃ behind petticoat pipe and the gasification cooling flue, then 550～650 ℃ high-temperature flue gas is purified through resistant to elevated temperatures pulse bag type dust collector, the clean coal gas that obtains temperature and be 500～600 ℃ enters waste heat boiler, and the coal gas that obtains 150～200 ℃ through residual heat boiler for exchanging heat is delivered to combustion gas and steam electric power generator combustion power generation through blower fan.
2. the method for a kind of converter gas purification according to claim 1 and waste heat recovery, it is characterized in that, the heat-eliminating medium that described gasification cooling flue and waste heat boiler adopt is the industrial pure water after the deoxygenation, this industrial pure water is converted to high temperature and high pressure steam after heat exchange, enter turbo-generator generating then, the low temperature and low pressure steam that comes out from turbo-generator is delivered to the water inlet of gasification cooling flue and waste heat boiler heating gasification cooling flue and waste heat boiler.
3. the method for a kind of converter gas purification according to claim 1 and waste heat recovery is characterized in that, flue gas flow rate 25～50m/s in the described gasification cooling flue.
4. the method for a kind of converter gas purification according to claim 1 and waste heat recovery, it is characterized in that, described pulse bag type dust collector is by deashing device, upper box, air outlet, middle casing, card, filter bag, flow deflector, blast inlet and ash bucket are formed, described deashing device is located in the upper box, described air outlet is located at a side of upper box, casing is connected with upper box by card in described, described filter bag is located in the middle casing, described flow deflector is located at a side of filter bag, described blast inlet is located at ash bucket top, and described ash bucket is located at the bottom of this fly-ash separator.
5. the method for a kind of converter gas purification according to claim 4 and waste heat recovery is characterized in that, the making material of described filter bag is a Stainless Steel Fibre sintering felt.
6. the method for a kind of converter gas purification according to claim 4 and waste heat recovery is characterized in that, the making material of described card is a stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102191397A CN101906505A (en) | 2010-07-06 | 2010-07-06 | Converter gas purification and waste heat reclamation method |
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| CN2010102191397A CN101906505A (en) | 2010-07-06 | 2010-07-06 | Converter gas purification and waste heat reclamation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012143487A1 (en) * | 2011-04-22 | 2012-10-26 | Siemens Vai Metals Technologies Gmbh | Process and apparatus for recovering converter gas |
| CN103160639A (en) * | 2013-02-21 | 2013-06-19 | 江苏浦士达环保科技有限公司 | Converter smoke waste heat utilizing system |
| CN103388048A (en) * | 2012-05-10 | 2013-11-13 | 山东省冶金设计院股份有限公司 | Physical-sensible-heat recovery method and device of converter flue gas |
| CN104197725A (en) * | 2014-07-31 | 2014-12-10 | 成都易态科技有限公司 | Method for dedusting and purifying of smelting smoke of submerged arc furnace and comprehensive utilization of sensible heat and latent heat of smelting smoke |
| CN104988264A (en) * | 2015-05-28 | 2015-10-21 | 北京科技大学 | Treatment and utilization method for sintering flue gas |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971191A (en) * | 2006-12-07 | 2007-05-30 | 昆明阳光数字技术股份有限公司 | Process for recovery of excess energy of flue gas from converter |
| CN201136877Y (en) * | 2007-12-06 | 2008-10-22 | 北京博鹏北科科技有限公司 | Generating set through recovery waste beat of converter coal gas and dust cleaning apparatus by dry method |
| CN201382701Y (en) * | 2009-01-19 | 2010-01-13 | 徐文玉 | Converter exhaust waste heat recycling device |
| CN201386112Y (en) * | 2009-03-03 | 2010-01-20 | 袁长胜 | Converter gas full-dry method purifying and residual heat utilizing equipment |
| CN101716445A (en) * | 2010-01-25 | 2010-06-02 | 上海信孚环保技术工程有限公司 | Impulse bag filter |
| CN101736117A (en) * | 2009-12-17 | 2010-06-16 | 上海宝钢工程技术有限公司 | Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system |
-
2010
- 2010-07-06 CN CN2010102191397A patent/CN101906505A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1971191A (en) * | 2006-12-07 | 2007-05-30 | 昆明阳光数字技术股份有限公司 | Process for recovery of excess energy of flue gas from converter |
| CN201136877Y (en) * | 2007-12-06 | 2008-10-22 | 北京博鹏北科科技有限公司 | Generating set through recovery waste beat of converter coal gas and dust cleaning apparatus by dry method |
| CN201382701Y (en) * | 2009-01-19 | 2010-01-13 | 徐文玉 | Converter exhaust waste heat recycling device |
| CN201386112Y (en) * | 2009-03-03 | 2010-01-20 | 袁长胜 | Converter gas full-dry method purifying and residual heat utilizing equipment |
| CN101736117A (en) * | 2009-12-17 | 2010-06-16 | 上海宝钢工程技术有限公司 | Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system |
| CN101716445A (en) * | 2010-01-25 | 2010-06-02 | 上海信孚环保技术工程有限公司 | Impulse bag filter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012143487A1 (en) * | 2011-04-22 | 2012-10-26 | Siemens Vai Metals Technologies Gmbh | Process and apparatus for recovering converter gas |
| CN103388048A (en) * | 2012-05-10 | 2013-11-13 | 山东省冶金设计院股份有限公司 | Physical-sensible-heat recovery method and device of converter flue gas |
| CN103160639A (en) * | 2013-02-21 | 2013-06-19 | 江苏浦士达环保科技有限公司 | Converter smoke waste heat utilizing system |
| CN104197725A (en) * | 2014-07-31 | 2014-12-10 | 成都易态科技有限公司 | Method for dedusting and purifying of smelting smoke of submerged arc furnace and comprehensive utilization of sensible heat and latent heat of smelting smoke |
| CN104197725B (en) * | 2014-07-31 | 2016-04-13 | 成都易态科技有限公司 | The method of comprehensive utilization of mine heat furnace smelting flue-gas dust removal and purification and sensible heat and latent heat |
| CN104988264A (en) * | 2015-05-28 | 2015-10-21 | 北京科技大学 | Treatment and utilization method for sintering flue gas |
| CN104988264B (en) * | 2015-05-28 | 2017-07-18 | 北京科技大学 | A kind of method for sintering fume treatment and utilizing |
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Application publication date: 20101208 |