CN114427793A - Sintering pollution-reducing and carbon-reducing system with alternating continuous circulation - Google Patents

Sintering pollution-reducing and carbon-reducing system with alternating continuous circulation Download PDF

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CN114427793A
CN114427793A CN202210028583.3A CN202210028583A CN114427793A CN 114427793 A CN114427793 A CN 114427793A CN 202210028583 A CN202210028583 A CN 202210028583A CN 114427793 A CN114427793 A CN 114427793A
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sintering
circulation
pipeline
flue gas
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CN114427793B (en
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冯俊小
史可鉴
吴佳睿
程灿
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
    • F27D17/002—Details of the installations, e.g. fume conduits or seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides an alternate continuous-circulation sintering pollution-reducing and carbon-reducing system, and belongs to the technical field of pollution-reducing and carbon-reducing treatment in a sintering process. The system is characterized in that a drying section is arranged between a distributing device and an ignition device of the sintering machine, hot gas of a sinter cooling device is introduced to the drying section to dry a material layer, hot waste gas discharged from the drying section is condensed and dewatered in mass energy recovery equipment and then is mixed with high-oxygen and high-temperature flue gas in the Nth section of the sintering machine, the hot waste gas is circulated to a smoke hood of the ignition section of the sintering machine for combustion-supporting ignition, the flue gas discharged from the ignition device is sequentially circulated to the N-1 section of the sintering machine for dedusting, desulfurization, denitration, dioxin and CO elimination, and CO capture2And (5) discharging. The flue gas circulation proportion of the system reaches 100 percent, and pollutants and CO are reduced to the maximum extent2The emission amount of the waste water reaches the effects of energy conservation, consumption reduction and emission reduction; meanwhile, the waste heat of hot gas of the sinter cooling equipment and high-temperature flue gas at the tail part of the sintering machine is recycled; oxygen supplement for each section of circulating flue gasThe fan is used for oxygen supplementation, so that the oxygen content of the circulating flue gas of each section is ensured.

Description

Sintering pollution-reducing and carbon-reducing system with alternating continuous circulation
Technical Field
The invention relates to the technical field of pollution reduction and carbon reduction in a sintering process, in particular to an alternating continuous-circulation pollution reduction and carbon reduction sintering system.
Background
The sintering process plays a significant role in the steel industry. The total emission of sintering flue gas is large, and currently, 4000-6000m of sintered ore is produced in each ton of production3Sintering flue gas of (2); the flue gas contains a certain proportion of water vapor and CO2And SO2、NOxAnd dioxins, etc. Therefore, the method reduces the emission of the pollution gas in the sintering process and has important significance for realizing and developing the ultralow emission in the steel industry.
Research at home and abroad shows that the sintering flue gas circulation technology can reduce the emission of sintering flue gas pollutants, can also utilize waste heat of waste gas, reduce the energy consumption of the process and achieve better energy-saving and emission-reducing effects. Therefore, the sintering flue gas circulation technology becomes an important measure for energy conservation and emission reduction in the steel industry. When the sintering flue gas is circulated to the sintering material layer, dust and oxysulfide in the flue gas are adsorbed in the material layer, so that the discharge amount of the dust and the oxysulfide is reduced, CO and the like in the flue gas can be combusted again to release heat, the consumption of solid fuel is reduced, dioxin is pyrolyzed through the combustion layer, and NO is generatedXIs partially eliminated at high temperature, and has obvious energy-saving and consumption-reducing effects.
At present, the EOS smoke circulation technology of the French Dutch's factory, the Eposint smoke circulation technology of Siemens Otto Union, the LEEP smoke circulation technology developed by Germany HKM company and the regional waste gas circulation technology of Xinri iron company exist abroad; the domestic technology for recycling the waste heat of the waste sintering gas of Bao steel and the like. However, the existing circulating process has a small flue gas circulation ratio and low emission reduction, for example, the regional waste gas circulation process of Nissian iron company only circulates high-oxygen flue gas, and the flue gas emission reduction rate is only 28%; increasing the flue gas circulation ratio can lead to the increase of the sulfur content in the sintering ore, such as Eposint circulation process and LEEP circulation process, high-sulfur flue gas is circulated, and the sulfur in the sintering ore is enriched; if the water vapor content in the circulating flue gas is too high, condensation will occur at the lower part of the material layer, resulting in the material layer being too wet and affecting the air permeability.
Therefore, it is necessary to develop a new sintering pollution-reducing and carbon-reducing system to solve the above problems.
Disclosure of Invention
The invention aims to provide an alternate continuous-circulation sintering pollution-reducing and carbon-reducing system, which realizes full circulation of flue gas, reduces the discharge amount of the flue gas to the maximum extent, reduces the discharge rate of flue gas pollutants, and simultaneously ensures that the yield and the quality of sintered ores cannot be reduced.
The system is characterized in that a drying section is arranged between a distributing device and an ignition device of the sintering machine, and the rear part of the ignition device of the sintering machine is divided into N sections;
the sintering ore cooling equipment is connected with the drying section through a hot air pipeline, the drying section is connected with the mass energy recovery equipment through a drying circulation pipeline, the mass energy recovery equipment is connected with the ignition device through a combustion-supporting circulation pipeline, the ignition device is connected with the first section of the sintering machine through a first circulation pipeline, the ignited flue gas sequentially passes through the first section, … … and the N-1 section after passing through the ignition device of the sintering machine, is dedusted by a deduster, and sequentially passes through the desulfurization equipment, the CO catalytic oxidation equipment, the denitration equipment, the dioxin treatment equipment, the CO treatment equipment2After the equipment is trapped, the flue gas reaches a chimney through a smoke exhaust pipeline to be discharged.
Divide into N section behind the ignition, N is greater than or equal to 2, be the first section near ignition, be the first section in proper order along sintering pallet moving direction, … …, the N-1 th section, the N section smokeless circulation petticoat pipe only has bottom bellows, all the other every sections all include to be no less than a flue gas circulation petticoat pipe and to be no less than a bottom bellows, connect by the circulation pipeline between every section of first section to the N-1 th section, totally N-1 circulation pipeline, each circulation pipeline is connected to each circulation petticoat pipe and bottom bellows through a plurality of branch road pipelines (be no less than one), the N section bottom bellows passes through N circulation pipeline connection ignition.
And a drying circulating pipeline is arranged in the drying section, the direction of hot waste gas in the drying circulating pipeline is opposite to the running direction of the sintering trolley, and the tail end of the drying circulating pipeline is connected with mass energy recovery equipment through a circulating fan.
The water pipe is arranged in the mass energy recovery equipment, water in the soft water tank is heated by the water pipe and then is conveyed to the sinter waste heat power generation system, hot waste gas in the mass energy recovery equipment is cooled, condensed water is conveyed to a material mixing process, the cooled hot waste gas is mixed with high-oxygen and high-temperature flue gas in the Nth section of the sintering machine, and the mixed flue gas enters the ignition device for combustion supporting through the combustion-supporting circulation pipeline.
The front ends of the smoke hoods from the first section to the N-1 section are all provided with an oxygen content detector; the circulating pipeline from the ignition device to the section N-1 is connected with an oxygen supplementing system through an oxygen pipeline, and when the concentration of oxygen in the flue gas of the circulating pipeline is lower than 18%, oxygen is supplemented to 21% in time.
The Nth circulating pipeline is connected with an oxygen supplementing system through an oxygen pipeline branch.
A smoke analyzer is arranged on the smoke discharge pipeline.
The length of the N-1 section is determined according to the actual length, the length of the smoke hood is the same as that of the sintering trolley, and a rubber wind shielding device is arranged below each circulating smoke hood to ensure that each circulating smoke hood is kept closed when corresponding to the sintering trolley; the bottom air boxes are arranged below the sintering trolley, the length of each bottom air box is the same as that of the trolley, and a rubber wind shielding device is arranged below each bottom air box to ensure that each bottom air box is kept closed when corresponding to the trolley.
The technical scheme of the invention has the following beneficial effects:
in the scheme, a reasonable flue gas circulation scheme is designed according to the emission characteristics of pollutants in each part of the sintering machine, all flue gas is circulated, the flue gas circulation proportion can reach 100 percent, and pollutants and CO are reduced to the maximum extent2The discharge amount of the sintered ore is not influenced, and the effects of energy conservation, consumption reduction and emission reduction are achieved; meanwhile, the waste heat of hot gas of the sinter cooling equipment and high-temperature flue gas at the tail part of the sintering machine is recycled; the flue gas is circulated in the sintering machine in sequence, and the high temperature of a sinter bed is utilized to partially decompose dioxin and NOXPartial elimination is carried out while simultaneously carrying out the treatment on SO2Pollutants are enriched, so that the effects of improving the desulfurization rate and the denitrification rate are achieved, and the desulfurization and denitrification operation and maintenance cost is reduced; the oxygen supplementing fan for supplementing oxygen to each section of circulating flue gas ensures the oxygen of each section of circulating flue gasAnd (4) content.
Drawings
FIG. 1 is a schematic diagram of an alternate continuous cycle sintering pollution-reducing and carbon-reducing system according to the present invention.
Wherein: 1-sintering machine; 2-a distributing device; 3-an ignition device; 4-smoke hood; 5-bottom bellows; 6-sinter cooling equipment; 7-hot gas pipeline; 8-drying the circulating pipeline; 9-combustion-supporting circulation pipeline; 10-a first circulation line; 11-a second circulation line; 12-a third circulation line; 13-the N-1 th circulation line; 14-Nth circulation pipeline; 15-a smoke exhaust pipeline; 16-a branch line; 17-an oxygen line; 18-a soft water tank; 19-a sinter waste heat power generation system; 20-a material mixing procedure; 21-a dust remover; 22-a desulfurization unit; 23-CO catalytic oxidation equipment; 24-a denitration device; 25-a dioxin treatment facility; 26-CO2A capture device; 27-a circulating fan; 28-a valve; 29-oxygen content detector; 30-a flue gas analyzer; 31-a chimney; 32-mass energy recovery device.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an alternate continuous-cycle sintering pollution-reducing and carbon-reducing system.
As shown in figure 1, the system is provided with a drying section between a distributor 2 and an ignition device 3 of a sintering machine 1, and the rear part of the ignition device 3 of the sintering machine is divided into N sections;
the sintering ore cooling equipment 6 is connected with the drying section through a hot air pipeline 7, the drying section is connected with a mass energy recovery equipment 32 through a drying circulation pipeline 8, the mass energy recovery equipment 32 is connected with an ignition device 3 through a combustion-supporting circulation pipeline 9, the ignition device 3 is connected with the first section of the sintering machine through a first circulation pipeline 10, the ignited flue gas sequentially passes through the first section, … … and the N-1 section of the ignition device 3 of the sintering machine, is dedusted by a deduster 21, and sequentially passes through a desulfurization equipment 22, a CO catalytic oxidation equipment 23, a denitration equipment 24, a dioxin treatment equipment 25, a CO2After the capture device 26, it is discharged through the flue gas duct 15 to the stack 31.
The rear portion of the ignition device 3 is divided into N sections, N is larger than or equal to 2, the portion close to the ignition device 3 is a first section, the first section, … …, an N-1 section and an N-th section are sequentially arranged along the running direction of the sintering trolley, the N-th section is only provided with a bottom air box 5, the rest sections all comprise at least one smoke circulation hood 4 and at least one bottom air box 5, the first section to the N-1 section are connected through circulation pipelines, N-1 circulation pipelines are totally, each circulation pipeline is connected to each circulation hood and the bottom air box through a plurality of branch pipelines 16, and the N-th section bottom air box 5 is connected with the ignition device 3 through an N-th circulation pipeline 14.
As shown in fig. 1, a first circulation line 10 connects the ignition device 3 with a first section of the sintering machine; the second circulation pipeline 11 is connected with the first section and the second section of the sintering machine; the third circulation pipeline 12 is connected with the second section and the third section of the sintering machine; the fourth circulating pipeline is connected with the third section and the fourth section of the sintering machine; the N-1 circulating pipeline 13 is connected with the N-2 section and the N-1 section of the sintering machine, and the bottom air box 5 of the N-1 section of the trolley is connected with a smoke exhaust pipeline 15; each circulating pipeline is connected to each circulating smoke hood and the bottom air box through a plurality of branch pipelines 16; and an air box at the bottom of the trolley at the Nth section of the sintering machine is connected to an ignition device of the sintering machine through an Nth circulating pipeline 14.
And a drying circulating pipeline 8 is arranged in the drying section, the direction of hot waste gas in the drying circulating pipeline 8 is opposite to the running direction of the sintering trolley, and the tail end of the drying circulating pipeline 8 is connected with a mass energy recovery device 32 through a circulating fan 27.
Valves 28 are provided as required in the various lines of the system.
Water pipes are arranged in the mass energy recovery equipment, water in the water softening tank 18 is heated by the water pipes and then is conveyed to the sinter waste heat power generation system 19, hot waste gas in the mass energy recovery equipment 32 is cooled, condensed water is conveyed to the material mixing process 20, the cooled hot waste gas is mixed with high-oxygen and high-temperature flue gas in the Nth section of the sintering machine, and the mixed flue gas enters the ignition device 3 through the combustion-supporting circulation pipeline 9 for supporting combustion.
The front ends of the smoke hoods of the first section to the N-1 section are all provided with an oxygen content detector 29; the circulating pipeline from the ignition device 3 to the (N-1) th section is connected with an oxygen supplementing system through an oxygen pipeline 17, and when the concentration of oxygen in the flue gas of the circulating pipeline is lower than 18%, oxygen is supplemented to 21% in time.
The Nth circulating pipeline 14 is connected with an oxygen supplementing system through an oxygen pipeline branch.
A flue gas analyzer 30 is arranged on the flue gas exhaust pipeline 15.
The length of the N-1 section is determined according to the actual length, the length of the smoke hood is the same as that of the sintering trolley, and a rubber wind shielding device is arranged below each circulating smoke hood to ensure that each circulating smoke hood is kept closed when corresponding to the sintering trolley; the bottom air boxes are arranged below the sintering trolley, the length of each bottom air box is the same as that of the trolley, and a rubber wind shielding device is arranged below each bottom air box to ensure that each bottom air box is kept closed when corresponding to the trolley.
In the system, the hot waste gas at the temperature of 150 ℃ in the rear part of the sinter cooling equipment is conveyed to a sinter bed in a drying section through a hot gas pipeline, the sinter bed is dried and then enters mass energy recovery equipment, the hot waste gas after heat exchange is mixed with the high-oxygen and high-temperature flue gas in the Nth section of the sintering machine, and the mixed gas is recycled to an ignition device of the sintering machine to be used as combustion-supporting air.
In the practical design, the flue gas circulation system is composed of a plurality of circulation pipelines, the sintering machine behind the ignition device 3 is divided into six sections, the section close to the ignition device is a first section, and the section close to the ignition device is a second section, a third section, a fourth section, a fifth section and a sixth section in sequence along the running direction of the trolley, except that the sixth section of the smokeless circulation hood only comprises a bottom air box, each section comprises a plurality of flue gas circulation hoods and bottom air boxes, each section is connected by the circulation pipelines, and the total number of the circulation pipelines is five; the hot gas pipeline is connected with the sinter cooling equipment and the drying section of the sintering machine; the circulation pipeline in the drying section is a drying circulation pipeline; the combustion-supporting circulation pipeline is connected with the mass energy recovery equipment and the ignition device; the first circulation pipeline is connected with the ignition device and the first section of the sintering machine; the second circulation pipeline is connected with the first section and the second section of the sintering machine; the third circulating pipeline is connected with the second section and the third section of the sintering machine; the fourth circulating pipeline is connected with the third section and the fourth section of the sintering machine; a fifth circulating pipeline is connected with the fourth section and the fifth section of the sintering machine, and an air box at the bottom of the fifth section of the trolley is connected with a smoke exhaust pipeline; an air box at the bottom of a trolley at the sixth section of the sintering machine is connected to an ignition device of the sintering machine through a sixth circulating pipeline; each circulating pipeline is connected to each circulating smoke hood and the bottom air box through a plurality of branch pipelines.
The method comprises the steps of conveying 150 ℃ hot waste gas behind a sinter cooling device to a sinter layer in a drying section through a hot gas pipeline, drying the sinter layer, then feeding the dried sinter layer into mass energy recovery device, carrying out heat exchange between the hot waste gas and cold soft water in the mass energy recovery device, condensing steam in the hot waste gas, then feeding the condensed steam into a mixing process for recycling, heating the cold soft water, then feeding the heated cold soft water into a sinter waste heat power generation system, mixing the heat-exchanged hot waste gas with high-oxygen and high-temperature flue gas in a sixth section of a sintering machine, recycling the mixed gas into an ignition device of the sintering machine as combustion-supporting air, collecting the flue gas by an air box at the bottom of the ignition device, then circulating the collected flue gas into a material layer in the first section of the sintering machine through a first circulating pipeline, and then sequentially flowing the flue gas along each circulating pipeline until the flue gas flows to an air box at the bottom of a fifth section of a sintering machine, and then feeding the flue gas into a smoke exhaust pipeline.
The smoke exhaust pipeline is provided with a dust remover, desulfurization equipment, denitration equipment and a smoke analyzer; the flue gas enters a CO catalytic oxidation device after being subjected to dust removal and desulfurization, the temperature of the flue gas can be increased after the CO is subjected to catalytic oxidation, the flue gas reaches the temperature required by denitration, then the flue gas enters a denitration device, and the flue gas is subjected to dioxin treatment and CO treatment after denitration2And discharging after trapping.
The oxygen supplementing system is connected to each section of circulating pipeline of the circulating smoke hood through an oxygen pipeline, an oxygen detector is arranged on the circulating pipeline, when the concentration of oxygen in smoke of the circulating pipeline is lower than 18%, oxygen is supplemented to 21% in time, and it is guaranteed that the concentration of oxygen in the smoke entering a sintering material layer at each time meets the requirement.
The circulating smoke hood is arranged above the sintering trolley, the length of each circulating smoke hood is the same as that of the trolley, and a rubber wind shielding device is arranged below each circulating smoke hood to ensure that each circulating smoke hood is kept closed when corresponding to the trolley, so that air leakage is reduced; the bottom air boxes are arranged below the sintering trolley, the length of each bottom air box is the same as that of the trolley, and a rubber wind shielding device is arranged below each bottom air box to ensure that each bottom air box is kept airtight when corresponding to the trolley, so that wind leakage is reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. An alternate continuous-circulation sintering pollution-reduction and carbon-reduction system is characterized in that a drying section is arranged between a distributing device and an ignition device of a sintering machine, and the rear part of the ignition device of the sintering machine is divided into N sections;
the sintering ore cooling equipment is connected with the drying section through a hot air pipeline, the drying section is connected with the mass energy recovery equipment through a drying circulation pipeline, the mass energy recovery equipment is connected with the ignition device through a combustion-supporting circulation pipeline, the ignition device is connected with the first section of the sintering machine through a first circulation pipeline, the ignited flue gas sequentially passes through the first section, … … and the N-1 section after passing through the ignition device of the sintering machine, is dedusted by a deduster, and sequentially passes through the desulfurization equipment, the CO catalytic oxidation equipment, the denitration equipment, the dioxin treatment equipment, the CO treatment equipment2After the equipment is trapped, the flue gas reaches a chimney through a smoke exhaust pipeline to be discharged.
2. The alternate continuous cycle sintering pollution-reducing and carbon-reducing system according to claim 1, wherein the ignition device is divided into N sections, N is greater than or equal to 2, the first section is adjacent to the ignition device, and the first section, … …, the N-1 section and the N section are sequentially arranged along the running direction of the sintering trolley, the N section of the smokeless gas circulation hood is only provided with a bottom air box, each of the other sections comprises not less than one flue gas circulation hood and not less than one bottom air box, each of the first section to the N-1 section is connected by a circulation pipeline, and the total number of the circulation pipelines is N-1, each circulation pipeline is connected to each circulation hood and the bottom air box by not less than one branch pipeline, and the N section of the bottom air box is connected with the ignition device by the N circulation pipeline.
3. The alternate continuous circulation sintering pollution-reducing and carbon-reducing system according to claim 1, wherein a drying circulation pipeline is arranged in the drying section, the direction of hot exhaust gas in the drying circulation pipeline is opposite to the running direction of the sintering trolley, and the tail end of the drying circulation pipeline is connected with mass-energy recovery equipment through a circulation fan.
4. The alternate continuous circulation sintering pollution-reducing and carbon-reducing system according to claim 1, wherein a water pipe is arranged in the mass-energy recovery equipment, water in the soft water tank is heated by the water pipe and then is conveyed to the sinter waste heat power generation system, hot waste gas in the mass-energy recovery equipment is cooled, condensed water is conveyed to a material mixing process, the cooled hot waste gas is mixed with high-oxygen and high-temperature flue gas in the Nth section of the sintering machine, and the mixed gas enters an ignition device through a combustion-supporting circulation pipeline for supporting combustion.
5. The alternating continuous circulation sintering pollution-reducing and carbon-reducing system according to claim 2, wherein the front ends of the smoke hoods of the first section to the N-1 section are provided with oxygen content detectors; the circulating pipeline from the ignition device to the (N-1) th section is connected with an oxygen supplementing system through an oxygen pipeline, and when the concentration of oxygen in the flue gas of the circulating pipeline is lower than 18%, oxygen is supplemented to 21% in time.
6. The alternate continuous cycle sintering fouling reduction and carbon reduction system of claim 1, wherein the Nth cycle line is connected to an oxygen supplement system through an oxygen line branch.
7. The alternating continuous circulation sintering contamination-reduction and carbon-reduction system according to claim 1, wherein a flue gas analyzer is arranged on the smoke discharge pipeline.
8. The alternate continuous cycle sintering pollution abatement carbon reduction system according to claim 2, wherein the N-1 st segment contains 1-2 more sintering trolleys than the N-2 nd segment, the N-th segment has a length determined according to practice, the hood length is the same as the sintering trolley, and a rubber wind shielding device is arranged below each circulation hood to ensure that each circulation hood is kept closed when corresponding to the sintering trolley; the bottom air boxes are arranged below the sintering trolley, the length of each bottom air box is the same as that of the trolley, and a rubber wind shielding device is arranged below each bottom air box to ensure that each bottom air box is kept closed when corresponding to the trolley.
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CN115355725A (en) * 2022-07-15 2022-11-18 石家庄市宏森熔炼铸造有限公司 Sintering machine tail flue gas processing system

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