CN201574162U - Converter flue gas complementary-energy generating system with gas combustion device - Google Patents
Converter flue gas complementary-energy generating system with gas combustion device Download PDFInfo
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- CN201574162U CN201574162U CN2009202824871U CN200920282487U CN201574162U CN 201574162 U CN201574162 U CN 201574162U CN 2009202824871 U CN2009202824871 U CN 2009202824871U CN 200920282487 U CN200920282487 U CN 200920282487U CN 201574162 U CN201574162 U CN 201574162U
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Abstract
The utility model relates to a converter flue gas complementary-energy generating system with a gas combustion device, comprising a steelmaking converter, a converter flue gas movable gas hood, an evaporating and cooling flue, a flue-type waste heat boiler, a turbo-generator set, a bag-type dust collector, a converter flue gas cleaning and recovering system and relevant auxiliary devices, wherein an entrance position and an exit position of the evaporating and cooling flue above the converter flue gas movable gas hood are respectively provided with a water-cooled slide damper; a front part of the flue-type waste heat boiler is provided with a water-cooling settling chamber; the external side of the prepositive settling chamber is provided with a gas burner; a converter gas cylinder is arranged in the converter flue gas cleaning and recovering system to be used for collecting the purified and cooled converter gas in the converter flue gas; and the converter gas cylinder is connected with the gas burner to lead the converter gas into the gas burner.
Description
Technical field
The utility model relates to converter gas purification and reclaims and cogeneration (utilization) field, particularly relates to a kind of converter gas power generating by remain energy system with coal gas burner.
Background technology
Iron and steel enterprise produces a large amount of tail gas in mass consumption coal, electric power equal energy source, wherein be rich in a large amount of waste heats, complementary energy secondary energy such as (chemical energy of coal gas of converter, pressure energy etc.).Top-blown oxygen converter produces a large amount of high-temperature flue gas (converter exit: 1400-1600 ℃) in steelmaking process, general by its waste heat of vaporization cooling heat transferring generation vapor portion ground recovery, but because the characteristics of convertor steelmaking process, the high-temperature flue gas of its generation has intermittence, the steam parameter fluctuating range is very big, has increased difficulty for effective utilization of steam.In addition, the high-temperature flue gas main component that converter produces is carbon monoxide and contains a large amount of small-particle dust, in batch production process, handles the bad gas explosion that very easily takes place.Therefore, utilizing converter gas waste heat, power generating by remain energy effectively, safely is a technical barrier of current process for making UTILIZATION OF VESIDUAL HEAT IN.The afterheat of converter gas of the most of steel-making enterprises of China, complementary energy recovery utilization rate only are 30-50%, and also nearly 40% (Dong Huizhong is etc. the industrial ecology analysis [J] of steel industry comprehensive utilization of energy for the rate of diffusing of coal gas of converter, the metallurgical energy, 2008,27 (2): 3-6,15).
At present, Chinese large-sized steel-making converter enterprise is divided into two kinds to the processing main method of converter gas: technology (OG method) and dry cleaning and recovering process (LT method) are reclaimed in wet purification.Above-mentioned two kinds of treatment processs all are to be starting point to guarantee production run and to reclaim coal gas, and do not have emphasis to consider that the sensible heat of flue gas reclaims and the comprehensive utilization of coal gas of converter resource.And for many small-sized steel-making converters enterprise, hardly converter gas is carried out any processing, and directly diffuse emptying, not only cause the serious waste of secondary energy such as fume afterheat, coal gas of converter, increase production energy consumption and serious pollution of ecological environment.
At present, existing following several representative steel-making converter fume afterheats (energy) reclaim electricity generating plan:
One, Xinyu, Jiangxi Iron And Steel Co., Ltd proposes converter gas waste heat saturation steam power generation system, utilizes gasification cooling flue cooling heat transferring high-temperature flue gas, produces saturation steam, the generating of pushing turbine group.This scheme is utilized the fluctuation of energy storage steam regulation, but it can only reclaim the waste heat of the high-temperature part of converter gas, and converter gas still has 800-1000 ℃ through the temperature behind the gasification cooling flue, the residual heat resources of this part are not then effectively utilized, moreover the temperature and pressure of saturation steam is lower, and its water capacity is higher, easily is condensed into water, may cause very big harm to the normal operation of turbine blade, system's generating efficiency is lower.In addition, the intermittence of converter makes infiltrates air in the flue gas waste heat recovery process most probably, and exist potential safety hazard (Cao Wu, Han Huizhen. steel-making converter fume afterheat saturation steam generating [J], coal gas and heating power, 2005,25 (9): 56-57).
Two, Chinese patent CN1971190A discloses a kind of power generation device by using residual heat and exhaust gas from converter, and the saturation steam that will be produced by gasification cooling flue is to generate electricity after fuel is heated into superheated vapour again with the coal gas of converter.This scheme is with respect to converter gas waste heat saturation steam power generation system, improved steam parameter, improved generating efficiency, but this scheme do not consider that the intermittence of converter makes and infiltrate air most probably in the flue gas waste heat recovery process, and easily cause the potential safety hazard of coal gas of converter blast; And coal gas of converter is not carried out purifying treatment, bigger to the heat transfer property influence of superheater.
Three, Chinese patent CN1597999A discloses a kind of coal gas of converter and afterheat steam comprehensive utilization power generation assembly.This scheme is to utilize the coal gas of converter burning to produce steam and converter waste heat boiler steam comprehensive electric generating, effectively utilizes coal gas of converter and afterheat steam.But the weak point of this scheme, coal gas of converter has discontinuity, and this makes the combustion chamber be in the state of intermittent operation, has influenced the yield of steam on the one hand, the rapid heat cycle of combustion chamber causes device to expand with heat and contract with cold frequently on the other hand, has had a strong impact on the work-ing life of device.In addition, infiltrate air most probably in the converter gas waste heat recovery process, this scheme does not propose to eliminate the effective measure of gas explosion.
Four, Chinese patent CN1971191A discloses a kind of process for recovery of excess energy of flue gas from converter, is that a kind of dry method dust and converter gas complementary energy reclaim technology.The high-temperature flue gas that steel-making converter produces produces saturation steam by gasification cooling flue, with the overheated one-tenth superheated vapour of saturation steam, is used for generating by superheater, reclaims clean coal gas of converter simultaneously.Its outstanding feature is in the non-blowing process of steel-making converter, combustion chamber and air that the coal gas of converter of collecting is turned back between petticoat pipe and the gasification cooling flue carry out mixed firing, produce the high-temperature flue gas more than 1500 ℃, guarantee the continuous recovery of steam, and the oxygen level in the flue gas of control burning back is lower than 1%.This method utilization burning reduces the oxygen level of the interior flue gas of flue in the converter batch production process, and makes complementary energy reclaim serialization, improves security, the work-ing life of extension fixture.But the special emphasis of this method is purification, reclaims coal gas of converter, and it fails to propose complete power generating by remain energy device.
Summary of the invention
The purpose of this utility model is, at convertor steelmaking process gap, discontinuous characteristics and cause the converter gas residual heat resources to be difficult to the difficult problem of industrialized utilization, and the present situation that causes a large amount of high-temperature residual heat resources (800-1000 ℃) to waste in the converter gas purification removal process, and a kind of converter gas power generating by remain energy system with coal gas burner is proposed.Under the prerequisite that does not influence STEELMAKING PRODUCTION, make full use of converter gas waste heat and coal gas of converter resource (chemical energy), produce continuous, stable relatively superheated vapour pushing turbine group generating, maximally utilise waste heat, complementary energy in the STEELMAKING PRODUCTION process, reduce the STEELMAKING PRODUCTION energy consumption, improve economic benefit of enterprises and improve the ecological environment.
For realizing such scheme, the utility model has adopted following technical scheme: a kind of converter gas power generating by remain energy system with coal gas burner, comprise steel-making converter, the converter gas movable gas hood, gasification cooling flue, the flue type residual heat boiler, turbine driven set, sack cleaner and converter gas purification recovery system and relevant utility appliance, the converter gas movable gas hood is located at the converter gas outlet, the converter gas movable gas hood is connected with gasification cooling flue, the exhanst gas outlet of gasification cooling flue is connected with flue type residual heat boiler smoke inlet, the exhaust-heat boiler flue gas outlet is connected with sack cleaner, sack cleaner connects the converter gas purification recovery system, the saturation steam that gasification cooling flue and waste heat boiler produce is sent in the boiler-steam dome, the superheated vapour that boiler produces, the generating of pushing turbine group; The ingress of the gasification cooling flue above described converter gas movable gas hood and the exit of gasification cooling flue, be respectively equipped with the water-cooled push-pull valve, be provided with the water-cooled settling pocket in the front portion of described flue type residual heat boiler, the preposition settling pocket outside is provided with gas burner, be provided with the coal gas of converter jar in the described converter gas purification recovery system, be used for collecting converter gas through purification, cooled coal gas of converter, the coal gas of converter jar is connected with gas burner, and coal gas of converter is introduced gas burner.
Water-cooled push-pull valve above converter steelmaking oxygen blast phase unlatching converter gas movable gas hood, high-temperature flue gas at first produces saturation steam at the gasification cooling flue cooling heat transferring, converter gas enters waste heat boiler with vertical mode afterwards, earlier in having the preposition settling pocket of wall-cooling surface, carry out pre-dedusting, enter the indoor heat exchange cooling of horizontal stove then, converter gas further purifies by sack cleaner again, collects the coal gas of converter jar after the cooling; The saturation steam that gasification cooling flue produces is sent in the boiler-steam dome, the superheated vapour that boiler produces, the generating of pushing turbine group; In the non-oxygen blast of the converter phase, close the water-cooled push-pull valve rapidly, and the coal gas of converter of collecting is introduced gas burner and combustion air mixed firing, produce high-temperature flue gas, guarantee that waste heat boiler normally, stably produces successive steam, the generating of steam pushing turbine group.
The technical problem of the purpose of this utility model and solution also can adopt following measure further to realize.
Described gasification cooling flue is provided with the bypass flue, is provided with the water-cooled push-pull valve in the ingress of bypass flue, and the bypass flue outlet is connected with the evaporative cooler inlet, and the evaporative cooler outlet is connected to sack cleaner.
Described flue type residual heat boiler comprises water-cooled settling pocket, drum, superheater, vaporizer and economizer, and in the settling pocket bottom ash bucket is set.
Described gas burner places described water-cooled settling pocket outer wall, comprises coal gas of converter inlet and combustion air inlet, and the outlet of coal gas of converter jar is connected with the coal gas of converter inlet.
Described gasification cooling flue also is provided with the coal gas explosion device, and the coal gas explosion device is in case of emergency to spray rare gas element (N
2) sneak into the explosion suppression device of oxygen concentration in the coal gas of converter with reduction, be installed in the gasification cooling flue middle part.
Advantage of the present utility model:
1, the flue type residual heat boiler carries settling pocket, adopts the vertical air inlet mode, utilizes gravity and inertia that converter gas is carried out pre-dedusting, can remove the soot particle of greater particle size.Can replace hot precipitator, simplify the converter gas purification device, reduce investment cost.
2, in the steel-making converter blowing process, make full use of fume afterheat, purify and reclaim coal gas of converter, in the non-blowing process of steel-making converter, utilize the coal gas of converter afterburning that reclaims to produce high-temperature flue gas, guarantee that waste heat boiler normally, stably produces successive steam, and block sneaking into of air in the converter batch production process (oxygen) effectively by the water-cooled push-pull valve, prevent gas explosion, improved the security of system greatly.
3, maximally utilising the fume afterheat and the coal gas of converter resource (complementary energy) that produce in the convertor steelmaking process generates electricity, improve steam production and steam parameter, improve converter gas waste heat, coal gas of converter complementary energy recycling efficient, improve power generation capacity, reduce the STEELMAKING PRODUCTION energy consumption.
4, system is provided with bypath system, guarantees that waste heat boiler breaks down or during shutdown maintenance, and coal gas of converter can normal cooling, purification and recovery, does not influence the ordinary production operation of converter steelmaking process.
Description of drawings
Fig. 1 is a process flow diagram of the present utility model.
Among the figure except that the literal of having indicated, 1-steel-making converter, 2-movable gas hood, 3-#1 water-cooled push-pull valve, 4-gasification cooling flue, 5-#1 drum, the 6-vaporizer-condenser, 7-#2 water-cooled push-pull valve, 8-#3 water-cooled push-pull valve, the 9-burner, 10-water wall settling pocket, 11-superheater, the 12-vaporizer, 13-economizer, 14-flue type residual heat boiler, the 15-#2 drum, 16-steam turbine, 17-generator, the 18-condenser, 19-deoxygenator, 20-condensate pump, the 21-water circulating pump, 22-sack cleaner, 23-gas analysis instrument, the 24-cooling tower, the 25-induced draft fan, 26-diffuses chimney, the 27-T-valve, the 28-gas cooler, 29-gas blower, 30-under meter, 31-coal gas gas-holder, 32-coal gas explosion device.
Embodiment
Below by embodiment the utility model is described further, but is not limited to embodiment.
Embodiment
Converter gas power generating by remain energy system with the band coal gas burner of certain steelworks 200t converter is an example.
The converter technical parameter:
1, converter nominal capacity: 200t
2, maximum furnace gas amount: 131000Nm
3/ h
3, smelting cycle: 36min (wherein, oxygen blow duration is 14min)
4, furnace gas enters the temperature of petticoat pipe: 1400-1600 ℃
5, the initial dust content of flue gas: 80-150g/Nm
3
6, original composition of fumes
| Composition | CO | CO 2 | N 2 | O 2 |
| Volume ratio (%) | 86 | 10 | 3.5 | 0.5 |
7, RECOVERY OF CONVERTER GAS amount: 68.48Nm
3/ t steel (the RECOVERY OF CONVERTER GAS rate is 80%)
8, in the non-oxygen blast of the steel-making converter phase, utilize gas burner, the flue-gas temperature that coal gas of converter and combustion air mixed firing produce is about 1600 ℃.
A kind of converter gas power generating by remain energy system with coal gas burner, comprise steel-making converter 1, converter gas movable gas hood 2, gasification cooling flue 4, coal gas explosion device 32, the flue type residual heat boiler 14 of band coal gas burner 9, turbine driven set 16,17, sack cleaner 22 and converter gas purification recovery system and relevant utility appliance, converter gas movable gas hood 2 is located at converter 1 exhanst gas outlet, converter gas movable gas hood 2 is connected with gasification cooling flue 4, the exhanst gas outlet of gasification cooling flue 4 is connected with flue type residual heat boiler 14 smoke inlets of band coal gas burner, waste heat boiler 14 exhanst gas outlets are connected with sack cleaner 22, sack cleaner 22 connects the converter gas purification recovery system, the saturation steam that gasification cooling flue 4 and waste heat boiler 14 produce is sent into boiler-steam dome 5, in 15, the superheated vapour that boiler 14 produces, pushing turbine group 16,17 generatings.The ingress of the gasification cooling flue above converter gas movable gas hood 2 and the exit of gasification cooling flue, be respectively equipped with #1 water-cooled push-pull valve 3, #3 water-cooled push-pull valve 8, be provided with water-cooled settling pocket 10 in the front portion of flue type residual heat boiler 14, preposition settling pocket 10 outsides are provided with gas burner 9, be provided with coal gas of converter jar 31 in the converter gas purification recovery system, be used for collecting converter gas through purification, cooled coal gas of converter, coal gas of converter jar 31 is connected with gas burner 9, and coal gas of converter is introduced gas burner 9.Gasification cooling flue 4 is provided with the bypass flue, is provided with #2 water-cooled push-pull valve 7 in the ingress of bypass flue, and the bypass flue outlet is connected with vaporizer-condenser 6 inlets, and vaporizer-condenser 6 outlets are connected to sack cleaner 22.Flue type residual heat boiler 14 comprises water-cooled settling pocket 10, #1, #2 drum, superheater 11, vaporizer 12 and economizer 13, and in the settling pocket bottom ash bucket is set.Gas burner 9 places water-cooled settling pocket 10 outer walls, and gas burner 9 comprises coal gas of converter inlet and combustion air inlet, and the outlet of coal gas of converter jar 31 is connected with the coal gas of converter inlet.Gasification cooling flue 4 also is provided with coal gas explosion device 32, and coal gas explosion device 32 is can in case of emergency spray rare gas element (N2) to sneak into the explosion suppression device of oxygen concentration in the coal gas of converter with reduction, is installed in gasification cooling flue 4 middle parts.
The utility model operation is as follows, as shown in Figure 1, converter 1 is in the steel-making blowing process, keep #1 water-cooled push-pull valve 3 and #2 water-cooled push-pull valve 8 to open, #3 water-cooled push-pull valve 7 on the bypass duct cuts out, converter gas (1400-1600 ℃) is collected by movable gas hood 2, enter gasification cooling flue 4 heat exchange cooling and produce saturation steam, converter gas is cooled to 800-1000 ℃, enter the water-cooled settling pocket 10 of flue type residual heat boiler 14 then, after carrying out pre-dedusting, heat exchange cooling in waste heat boiler 14, converter gas after the cooling passes through sack cleaner 22 further smart dedustings again, composition by 23 pairs of converter gas of gas analysis instrument is analyzed, after qualified coal gas of converter enters gas cooler 28 further coolings, send into coal gas gas-holder 31 again, underproof coal gas of converter is then discharged by diffusing chimney 26, the saturation steam that gasification cooling flue 4 produces is sent in the #2 drum 15 of waste heat boiler 14 by #1 drum 5, the saturation steam that produces with waste heat boiler 15 is heated into superheated vapour, pushing turbine group 16 in the lump in superheater 11,17 generatings; Converter 1 is in the non-blowing process of steel-making, close # 1 water-cooled push-pull valve 3 and #2 water-cooled push-pull valve 8 rapidly, the coal gas of converter that coal gas gas-holder 15 is collected and combustion air are fed through high-temperature flue gas (about 1600 ℃) that gas burner 9 burnings the produce water wall heat exchange generation saturation steam by waste heat boiler 14 burner hearths, by economizer 13 cooled smoke (being lower than 200 ℃), after sack cleaner 22 dedustings, discharge by diffusing chimney 26; The superheated vapour of the medium temperature and medium pressure that waste heat boiler produces promotes turbine driven set 16,17 generatings, the exhaust steam that steam turbine is discharged is condensed into saturation water by condenser 18, cooling tower 24 (cooling system), send into deoxygenator 19 by condensate pump 20 at last, form a complete steam power cycle.
Claims (7)
1. be with the converter gas power generating by remain energy system of coal gas burner, comprise steel-making converter, the converter gas movable gas hood, gasification cooling flue, the flue type residual heat boiler, turbine driven set, sack cleaner and converter gas purification recovery system and relevant utility appliance, the converter gas movable gas hood is located at the converter gas outlet, the converter gas movable gas hood is connected with gasification cooling flue, the exhanst gas outlet of gasification cooling flue is connected with flue type residual heat boiler smoke inlet, the exhaust-heat boiler flue gas outlet is connected with sack cleaner, sack cleaner connects the converter gas purification recovery system, the saturation steam that gasification cooling flue and waste heat boiler produce is sent in the boiler-steam dome, the superheated vapour that boiler produces, the generating of pushing turbine group; It is characterized in that: the ingress of the gasification cooling flue above described converter gas movable gas hood and the exit of gasification cooling flue, be respectively equipped with the water-cooled push-pull valve, be provided with the water-cooled settling pocket in the front portion of described flue type residual heat boiler, the preposition settling pocket outside is provided with gas burner, be provided with the coal gas of converter jar in the described converter gas purification recovery system, be used for collecting converter gas through purification, cooled coal gas of converter, the coal gas of converter jar is connected with gas burner, and coal gas of converter is introduced gas burner.
2. the converter gas power generating by remain energy system of band coal gas burner according to claim 1, it is characterized in that: described gasification cooling flue is provided with the bypass flue, be provided with the water-cooled push-pull valve in the ingress of bypass flue, the bypass flue outlet is connected with the evaporative cooler inlet, and the evaporative cooler outlet is connected to sack cleaner.
3. the converter gas power generating by remain energy system of band coal gas burner according to claim 1 is characterized in that: described flue type residual heat boiler is made of water wall settling pocket, superheater, vaporizer and economizer, and the settling pocket bottom is provided with ash bucket.
4. the converter gas power generating by remain energy system of band coal gas burner according to claim 3, it is characterized in that: described gas burner places described water-cooled settling pocket outer wall, comprise coal gas of converter inlet and combustion air inlet, the outlet of coal gas of converter jar is connected with the coal gas of converter inlet.
5. according to the converter gas power generating by remain energy system of claim 1 or 3 described band coal gas burners, it is characterized in that: described cooling stack also is provided with the coal gas explosion device, described coal gas explosion device is the explosion suppression device that can spray rare gas element, is arranged in the gasification cooling flue middle part.
6. the converter gas power generating by remain energy system of band coal gas burner according to claim 3 is characterized in that: the water in the described economizer is pump circulation, and the water in described water-cooled settling pocket, the generating tube tank nest is natural circulation.
7. according to the converter gas power generating by remain energy system of claim 1 or the described band coal gas burner of claim 2, it is characterized in that: described gasification cooling flue is provided with the bypass flue, has evaporative cooler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202824871U CN201574162U (en) | 2009-12-18 | 2009-12-18 | Converter flue gas complementary-energy generating system with gas combustion device |
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|---|---|---|---|
| CN2009202824871U CN201574162U (en) | 2009-12-18 | 2009-12-18 | Converter flue gas complementary-energy generating system with gas combustion device |
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| CN2009202824871U Expired - Lifetime CN201574162U (en) | 2009-12-18 | 2009-12-18 | Converter flue gas complementary-energy generating system with gas combustion device |
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| CN102305551A (en) * | 2011-08-24 | 2012-01-04 | 孙慕文 | Converter afterheat and steam compensation combustion type generating system |
| CN102445085A (en) * | 2010-10-08 | 2012-05-09 | 王全祥 | High-temperature flue gas and dust dry purification and waste heat recovery process for ore furnace |
| CN102676729A (en) * | 2012-06-05 | 2012-09-19 | 中冶华天南京工程技术有限公司 | Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag |
| CN102767815A (en) * | 2011-05-04 | 2012-11-07 | 朱永彪 | Methane burning chamber |
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| CN102676729A (en) * | 2012-06-05 | 2012-09-19 | 中冶华天南京工程技术有限公司 | Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag |
| CN102676729B (en) * | 2012-06-05 | 2014-01-15 | 中冶华天南京工程技术有限公司 | Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag |
| CN103614509A (en) * | 2013-12-04 | 2014-03-05 | 无锡雪浪环境科技股份有限公司 | Carbon steel converter dry cloth bag dust removal process and device capable of recovering waste heat in whole process |
| CN103614509B (en) * | 2013-12-04 | 2016-01-27 | 无锡雪浪环境科技股份有限公司 | A kind of carbon steel converter dry cloth bag dedusting process of whole process recovery waste heat and device thereof |
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| CN111961798A (en) * | 2020-08-26 | 2020-11-20 | 重庆赛迪热工环保工程技术有限公司 | Converter gas waste heat utilization system and method |
| CN113945099A (en) * | 2021-11-02 | 2022-01-18 | 中冶南方都市环保工程技术股份有限公司 | Electric furnace flue gas waste heat utilization method and system |
| CN115355728A (en) * | 2022-07-27 | 2022-11-18 | 中冶南方都市环保工程技术股份有限公司 | Steel-making electric furnace flue gas explosion-proof dust removal system and use method thereof |
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