CN105927575A - Oxygen enriched air blast system in front of blast furnace blower - Google Patents
Oxygen enriched air blast system in front of blast furnace blower Download PDFInfo
- Publication number
- CN105927575A CN105927575A CN201610417809.3A CN201610417809A CN105927575A CN 105927575 A CN105927575 A CN 105927575A CN 201610417809 A CN201610417809 A CN 201610417809A CN 105927575 A CN105927575 A CN 105927575A
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- Prior art keywords
- oxygen
- blast furnace
- machine
- enriched
- furnace blower
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
Abstract
The invention discloses an oxygen enriched air blast system in front of a blast furnace blower. The oxygen enriched air blast system in front of the blast furnace blower comprises an air filter, a blower fan, a hot-blast stove, a blast furnace and an oxygen generation air separation column. The air filter is connected with an inlet of the blower fan through a blower front air inlet pipe, an outlet of the blower fan is connected with an inlet of the hot-blast stove through a blower back air outlet pipe, and an outlet of the hot-blast stove is connected with the blast furnace. The oxygen enriched air blast system in front of the blast furnace blower is characterized by further comprising a blast furnace blower front oxygen enrichment control system and a blower fan PLC. The oxygen generation air separation column communicates with the blower front air inlet pipe through an oxygen pipeline. The oxygen pipeline is provided with an oxygen regulating valve and an oxygen fast switching valve in the oxygen inlet direction in sequence. The blower back air outlet pipe is provided with an oxygen content analysis meter and a carbon monoxide analysis meter. The blast furnace blower front oxygen enrichment control system is electrically connected with the blower fan PLC, the oxygen content analysis meter, the carbon monoxide analysis meter and the oxygen fast switching valve at the same time. The oxygen enriched air blast system in front of the blast furnace blower has the advantages of low production and use cost and high use safety for enterprises.
Description
Technical field
The present invention relates to blast furnace blower oxygen-enriched air blast technical field, be specifically related to oxygen-enriched air blast system before blast furnace blower machine.
Background technology
Oxygen-enriched air blast is to add industry oxygen in blast furnace air, makes air blast oxygen content exceed air oxygen content, and it can be effectively improved blast fumance efficiency, reduces coke ratio and ton ferrum production cost, is the energy-saving and cost-reducing technical measures of current blast furnace ironmaking.The structure of the blast furnace blower oxygen-enriched air blast system used at present is: include air filter, aerator, air stove, blast furnace and oxygen air separation column processed, described air filter is connected with the import of aerator by machine advance airduct, the outlet of aerator is connected with the import of air stove by discharge pipe after machine, the outlet of air stove is connected with blast furnace, described oxygen air separation column processed is connected with the import of oxygen compressor, the outlet of oxygen compressor is connected with the import of storage oxygen spherical tank, the outlet of storage oxygen spherical tank is connected by the import of oxygen enrichment station, and the outlet of oxygen enrichment station is connected with discharge pipe after machine.The operation principle of above-mentioned blast furnace blower oxygen-enriched air blast system is: oxygen air separation column processed is produced the low oxygen of (10～20) kpa and is forced into 3.0Mpa entrance storage oxygen spherical tank through oxygen compressor, oxygen in storage oxygen spherical tank discharge pipe after entrance machine after oxygen enrichment station is decompressed to (0.3～0.6) Mpa again, simultaneously outside air under the effect of aerator through air filter, machine advance airduct enters aerator, discharge pipe after aerator enters machine again, air stove is entered after the oxygen of discharge pipe is mixed together after the air of discharge pipe and entrance machine after entrance machine, the mixed gas of air and oxygen enters blast furnace after being heated by air stove.The shortcoming of above-mentioned blast furnace blower oxygen-enriched air blast system is: the blast furnace blower oxygen-enriched air blast system used at present is oxygen-enriched mode after aerator machine, oxygen needs just can enter discharge pipe after machine after boosting and reduced pressure operation, oxygen needs to consume a large amount of electric energy during repeating boosting and blood pressure lowering, and the maintenance cost of oxygen compressor and oxygen enrichment station is high, cause enterprise's production and application cost high.
Summary of the invention
It is an object of the invention to provide oxygen-enriched air blast system before a kind of enterprise production and application low cost and blast furnace blower machine safe to use.
nullFor achieving the above object，Present invention employs following technical scheme: oxygen-enriched air blast system before described blast furnace blower machine，Including air filter、Aerator、Air stove、Blast furnace and oxygen air separation column processed，Described air filter is connected with the import of aerator by machine advance airduct，The outlet of aerator is connected with the import of air stove by discharge pipe after machine，The outlet of air stove is connected with blast furnace，Oxygen-enriched control system and aerator PLC before also including blast furnace blower machine，Described oxygen air separation column processed is connected with machine advance airduct by oxygen pipeline，Oxygen pipeline is disposed with oxygen regulating valve along oxygen airintake direction and oxygen cuts valve soon，Oxygen conten analyser and carbonyl analyzer it is provided with on discharge pipe after machine，Before described blast furnace blower machine oxygen-enriched control system simultaneously with aerator PLC、Oxygen conten analyser、Carbonyl analyzer and oxygen cut valve electrical connection soon，Aerator stopping signal can be sent to oxygen-enriched control system before blast furnace blower machine by described aerator PLC，Described oxygen conten analyser can oxygen-enriched control system before the oxygen content of gas the oxygen content that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe after monitoring machine in real time，Described carbonyl analyzer can oxygen-enriched control system before the carbonomonoxide concentration of gas the carbonomonoxide concentration that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe after monitoring machine in real time；When control system oxygen-enriched before blast furnace blower machine receive aerator PLC send aerator stopping signal time, before blast furnace blower machine oxygen-enriched control system can control close oxygen cut valve soon；When control system oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe, the oxygen content of gas is more than oxygen content secure setting, before blast furnace blower machine, oxygen-enriched control system can control to close oxygen and cuts valve soon；When control system oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe, the carbonomonoxide concentration of gas is more than carbonomonoxide concentration secure setting, before blast furnace blower machine, oxygen-enriched control system can control to close oxygen and cuts valve soon.
Further, oxygen-enriched air blast system before aforesaid blast furnace blower machine, wherein: described oxygen content secure setting is 26～28%.
Further, oxygen-enriched air blast system before aforesaid blast furnace blower machine, wherein: described carbonomonoxide concentration secure setting is 1800～2000ppm.
Further, oxygen-enriched air blast system before aforesaid blast furnace blower machine, wherein: on oxygen pipeline, be provided with hand stop valve.
Further, oxygen-enriched air blast system before aforesaid blast furnace blower machine, wherein: on oxygen pipeline, be provided with the pressure transmitter monitoring oxygen pipeline pressure in real time.
Further, oxygen-enriched air blast system before aforesaid blast furnace blower machine, wherein: on oxygen pipeline, be provided with the effusion meter of oxygen flow in real-time monitoring oxygen pipeline.
By the enforcement of technique scheme, the invention has the beneficial effects as follows: the oxygen-enriched mode that (1) is oxygen-enriched before using aerator machine, eliminate oxygen compressor pressurization and and oxygen enrichment station decompression process, decrease the use frequency of oxygen compressor and oxygen enrichment station, extend the service life of oxygen compressor and oxygen enrichment station, and the electricity of about 4500kw can be saved every day, the electricity charge of about 24,440,000 yuan can be saved every year, greatly reduce the production and application cost of enterprise；(2) use oxygen-enriched control system before blast furnace blower machine to cut valve soon with aerator PLC, oxygen conten analyser, carbonyl analyzer and oxygen to coordinate and control opening and closing oxygen pipeline, it is ensured that the normal table operation of blast furnace, safe to use.
Accompanying drawing explanation
Fig. 1 is the operation principle schematic diagram of oxygen-enriched air blast system before blast furnace blower machine of the present invention.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
nullAs shown in Figure 1，Oxygen-enriched air blast system before described blast furnace blower machine，Including air filter 1、Aerator 2、Air stove 3、Blast furnace 4 and oxygen air separation column 5 processed，Described air filter 1 is connected with the import of aerator 2 by machine advance airduct 6，The outlet of aerator 2 is connected by the import of discharge pipe after machine 7 with air stove 3，The outlet of air stove 3 is connected with blast furnace 4，Oxygen-enriched control system 8 and aerator PLC9 before also including blast furnace blower machine，Described oxygen air separation column processed 5 is connected with machine advance airduct 6 by oxygen pipeline 10，Oxygen pipeline 10 is disposed with oxygen regulating valve 11 along oxygen airintake direction and oxygen cuts valve 12 soon，Oxygen conten analyser 13 and carbonyl analyzer 14 it is provided with on discharge pipe 7 after machine，Before described blast furnace blower machine oxygen-enriched control system 8 simultaneously with aerator PLC9、Oxygen conten analyser 13、Carbonyl analyzer 14 and oxygen are cut valve 12 soon and are electrically connected，Described aerator PLC9 aerator stopping signal can be sent to blast furnace blower machine before oxygen-enriched control system 8，Described oxygen conten analyser 13 can oxygen-enriched control system 8 before the oxygen content of gas the oxygen content that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe 7 after monitoring machine in real time，Described carbonyl analyzer 14 can oxygen-enriched control system 8 before the carbonomonoxide concentration of gas the carbonomonoxide concentration that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe 7 after monitoring machine in real time；When control system 8 oxygen-enriched before blast furnace blower machine receive aerator PLC9 send aerator stopping signal time, before blast furnace blower machine oxygen-enriched control system 8 can control close oxygen cut valve 12 soon；When control system 8 oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe 7, the oxygen content of gas is more than oxygen content secure setting, before blast furnace blower machine, oxygen-enriched control system 8 can control to close oxygen and cuts valve 12 soon；When control system 8 oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe 7, the carbonomonoxide concentration of gas is more than carbonomonoxide concentration secure setting, before blast furnace blower machine, oxygen-enriched control system 8 can control to close oxygen and cuts valve 12 soon；In the present embodiment, described oxygen content secure setting is 26～28%, so can better ensure that the stable operation of blast furnace；In the present embodiment, described carbonomonoxide concentration secure setting is 1800～2000ppm, and after being so prevented effectively from blast furnace fault, high furnace gas pours in down a chimney into oxygen pipeline 10, further increases the safety in utilization of blast furnace；In the present embodiment, oxygen pipeline 10 is provided with hand stop valve 15, so may further ensure that the safe and stable operation of blast furnace, improve the safety in utilization of blast furnace further；In the present embodiment, oxygen pipeline 10 is provided with the pressure transmitter 16 monitoring oxygen pipeline pressure in real time, so may further ensure that the safe and stable operation of blast furnace, improve the safety in utilization of blast furnace further；In the present embodiment, oxygen pipeline 10 is provided with the effusion meter 17 of oxygen flow in real-time monitoring oxygen pipeline, so may further ensure that the safe and stable operation of blast furnace, improve the safety in utilization of blast furnace further；
The operation principle of the present invention is as follows:
Outside air enters machine advance airduct 6 through air filter 1 under the effect of aerator 2, simultaneously, oxygen air separation column 5 processed produce high pressure oxygen through oxygen pipeline 10 also into machine advance airduct 6, the high pressure oxygen of entrance machine advance airduct 6 can enter aerator 2 with the air of entrance machine advance airduct 6 after being sufficiently mixed, discharge pipe 7 after machine is entered again by aerator 2, after machine, discharge pipe 7 enters air stove 3 again, and air stove 3 enters blast furnace 4 after the mixed gas entering air stove 3 being heated；In blast furnace 4 running, when control system 8 oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe 7, the oxygen content of gas is more than 28%, before blast furnace blower machine, oxygen-enriched control system 8 can control to close oxygen and cuts valve 12 soon；After before blast furnace blower machine, oxygen-enriched control system 8 receives machine in discharge pipe 7 carbonomonoxide concentration of gas more than 2000ppm time, before blast furnace blower machine oxygen-enriched control system 8 can control close oxygen cut valve 12 soon；And when control system 8 oxygen-enriched before blast furnace blower machine receives the aerator stopping signal that aerator PLC9 sends; before blast furnace blower machine oxygen-enriched control system 8 also can control close oxygen cut valve 12 soon; the safe and stable operation of blast furnace so can be effectively ensured, improve the safety in utilization of blast furnace.Oxygen-enriched mode oxygen-enriched before the invention have the advantage that (1) employing aerator machine, eliminate oxygen compressor pressurization and and oxygen enrichment station decompression process, decrease the use frequency of oxygen compressor and oxygen enrichment station, extend the service life of oxygen compressor and oxygen enrichment station, and every day can save the electricity of about 4500kw, the electricity charge of about 24,440,000 yuan can be saved every year, greatly reduce the production and application cost of enterprise；(2) use oxygen-enriched control system before blast furnace blower machine to cut valve soon with aerator PLC, oxygen conten analyser, carbonyl analyzer and oxygen to coordinate and control opening and closing oxygen pipeline, it is ensured that the normal table operation of blast furnace, safe to use.
Claims (6)
- null1. oxygen-enriched air blast system before blast furnace blower machine，Including air filter、Aerator、Air stove、Blast furnace and oxygen air separation column processed，Described air filter is connected with the import of aerator by machine advance airduct，The outlet of aerator is connected with the import of air stove by discharge pipe after machine，The outlet of air stove is connected with blast furnace，It is characterized in that: oxygen-enriched control system and aerator PLC before also including blast furnace blower machine，Described oxygen air separation column processed is connected with machine advance airduct by oxygen pipeline，Oxygen pipeline is disposed with oxygen regulating valve along oxygen airintake direction and oxygen cuts valve soon，Oxygen conten analyser and carbonyl analyzer it is provided with on discharge pipe after machine，Before described blast furnace blower machine oxygen-enriched control system simultaneously with aerator PLC、Oxygen conten analyser、Carbonyl analyzer and oxygen cut valve electrical connection soon，Aerator stopping signal can be sent to oxygen-enriched control system before blast furnace blower machine by described aerator PLC，Described oxygen conten analyser can oxygen-enriched control system before the oxygen content of gas the oxygen content that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe after monitoring machine in real time，Described carbonyl analyzer can oxygen-enriched control system before the carbonomonoxide concentration of gas the carbonomonoxide concentration that monitoring obtained are sent to blast furnace blower machine in real time in discharge pipe after monitoring machine in real time；When control system oxygen-enriched before blast furnace blower machine receive aerator PLC send aerator stopping signal time, before blast furnace blower machine oxygen-enriched control system can control close oxygen cut valve soon；When control system oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe, the oxygen content of gas is more than oxygen content secure setting, before blast furnace blower machine, oxygen-enriched control system can control to close oxygen and cuts valve soon；When control system oxygen-enriched before blast furnace blower machine receives after machine that in discharge pipe, the carbonomonoxide concentration of gas is more than carbonomonoxide concentration secure setting, before blast furnace blower machine, oxygen-enriched control system can control to close oxygen and cuts valve soon.
- Oxygen-enriched air blast system before blast furnace blower machine the most according to claim 1, it is characterised in that: described oxygen content secure setting is 26～28%.
- Oxygen-enriched air blast system before blast furnace blower machine the most according to claim 1, it is characterised in that: described carbonomonoxide concentration secure setting is 1800～2000ppm.
- Oxygen-enriched air blast system before blast furnace blower machine the most according to claim 1, it is characterised in that: on oxygen pipeline, it is provided with hand stop valve.
- Oxygen-enriched air blast system before blast furnace blower machine the most according to claim 1, it is characterised in that: on oxygen pipeline, it is provided with the pressure transmitter monitoring oxygen pipeline pressure in real time.
- Oxygen-enriched air blast system before blast furnace blower machine the most according to claim 1, it is characterised in that: on oxygen pipeline, it is provided with the effusion meter of oxygen flow in real-time monitoring oxygen pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610417809.3A CN105927575A (en) | 2016-06-15 | 2016-06-15 | Oxygen enriched air blast system in front of blast furnace blower |
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| CN201610417809.3A CN105927575A (en) | 2016-06-15 | 2016-06-15 | Oxygen enriched air blast system in front of blast furnace blower |
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Cited By (5)
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| CN106755678A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | Oxygen enrichment system before a kind of blast furnace machine |
| CN106755669A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | Machine oxygen enriching process before a kind of blast furnace |
| CN107955848A (en) * | 2017-12-27 | 2018-04-24 | 北京京诚科林环保科技有限公司 | Oxygen-enriching device before a kind of blast furnace machine |
| CN109236693A (en) * | 2018-10-16 | 2019-01-18 | 中钢集团工程设计研究院有限公司 | The control method of oxygen-enriched Blast Furnace Blower System before a kind of machine |
| CN114317854A (en) * | 2022-02-11 | 2022-04-12 | 山东钢铁集团永锋临港有限公司 | Control method for oxygen-enriched blast in blast furnace ironmaking production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106755678A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | Oxygen enrichment system before a kind of blast furnace machine |
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| CN114317854A (en) * | 2022-02-11 | 2022-04-12 | 山东钢铁集团永锋临港有限公司 | Control method for oxygen-enriched blast in blast furnace ironmaking production |
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Application publication date: 20160907 |
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