CN104060005A - Oxygen enrichment system of blast furnace blower - Google Patents
Oxygen enrichment system of blast furnace blower Download PDFInfo
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- CN104060005A CN104060005A CN201310087128.1A CN201310087128A CN104060005A CN 104060005 A CN104060005 A CN 104060005A CN 201310087128 A CN201310087128 A CN 201310087128A CN 104060005 A CN104060005 A CN 104060005A
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Abstract
The invention discloses an oxygen enrichment system of a blast furnace blower. The oxygen enrichment system comprises an oxygen generation apparatus, a before-blower air-oxygen mixer, an after-blower air-oxygen mixer, a before-blower oxygen-enriching apparatus and an after-blower oxygen-enriching apparatus, wherein the before-blower air-oxygen mixer and the after-blower air-oxygen mixer are respectively connected with the front and rear ends of the blower, one end of the before-blower oxygen-enriching apparatus is communicated with the oxygen generation apparatus, the other end of the before-blower oxygen-enriching apparatus is connected with the before-blower air-oxygen mixer, one end of the after-blower oxygen-enriching apparatus is communicated with the oxygen generation apparatus, and the other end of the after-blower oxygen-enriching apparatus is connected with the before-blower air-oxygen mixer. According to the invention, through before-blower and after-blower oxygen enrichment, an original before-blower oxygen-enriching apparatus can be retained, equipment capacity of the after-blower oxygen-enriching apparatus to be additionally installed is reduced, and investment cost for equipment is reduced; and the oxygen enrichment amount of oxygen enriched by the before-blower oxygen-enriching apparatus is maintained, so the advantage of low operation low for unit oxygen enrichment amount is stilled retained. For the whole oxygen enrichment amount, a part of oxygen enrichment amount is realized by using oxygen enriched at low operation cost. Thus, the oxygen enrichment system has low total operation cost which is lower than operation cost for oxygen enrichment by using full-after-blower oxygen-enriching apparatus.
Description
Technical field
The present invention relates to oxygen-rich smelting equipment, more particularly, relate to a kind of blast furnace blowing engine oxygen enrichment system.
Background technology
In order to improve blast-melted output, reduce the production cost of blast furnace, large blast furnace in the world, most technology that all adopts oxygen-rich smelting.Oxygen-rich smelting refers to: send into the pressurized air that blast furnace participate in to smelt (also referred to as: wind), the content of oxygen is greater than the airborne oxygen content of 21%(occurring in nature and is about 21%), such blast-furnace smelting is called as oxygen-rich smelting.
Current: the method that rich-oxygen of blast furnace is conventional has two kinds.
First method is oxygen enrichment before machine, please as shown in Figure 1:
On gas blower upstream line, add a certain amount of oxygen, like this, entering the compressed gas of gas blower is the mixed gas of air, oxygen.Specific as follows: oxyen manutactory oxygen generating plant 101(is air separation column) the middle oxygen (pressure is 20-40kap) producing, through oxygen installation's oxygen, send valve 102, by pipeline, delivered to oxygen intake valve 103 places of blast furnace 111 air blast station gas blower oxygen-enriching devices, oxygen is through oxygen-enriching device flow control valve 104 flow on demand, in air oxygen mixing device 106, with air, fully mix, then by gas blower 109, sucked together, after pressurization, by pipeline, deliver to hotblast stove 110, after heating, be admitted to again in blast furnace 111.The air that gas blower 109 sucks, needs carry out dedusting through the air dust remover 107 of gas blower 109 upstream line front ends, then carries out on request dehumidification by air dehumidifying device 108, finally by gas blower 109, is sucked after pressurization by sending.In Fig. 1 105 is oxygen outlet stopping valve, and 110 is hotblast stove.
Before machine, oxygen enrichment shortcoming is: drum blast furnace blowing engine is said in essence, it is air compressor, high-content to oxygen in compressed mixed gas is conditional, the blast furnace blowing engine that certain steel mill is used at present, allow oxygen content in compressed mixed gas to be up to 27%, corresponding maximum enrichment rate is 6%.If oxygen content surpasses 27% in compressed mixed gas, because blower export wind-warm syndrome is higher, approach 280-300 ℃, easy initiation fire, the safety of gas blower itself is difficult to guarantee.Therefore, before machine, Rich Oxygen Amount, the enrichment rate of oxygen-enriching device is all restricted.
Second method is oxygen enrichment after machine, is also the method for oxygen enrichment after the most of employing machine of large blast furnace in the world, please as shown in Figure 2:
At blower export, to certain position on the pipeline of hotblast stove stokehold, add a certain amount of oxygen, it is (to see figure bis-) on the air supply duct after gas blower machine that this oxygen adds, so be called as oxygen enrichment after machine.Specific as follows: oxyen manutactory oxygen generating plant 201(is air separation column) the middle oxygen (pressure is 20-40kap) producing, through 203 pressurizations of oxygen pressing machine, make its pressure bring up to 0.7-0.9Mpa, by pipeline, deliver to oxygen-enriching device inlet valve 204 places, after 205 voltage stabilizings of oxygen-enriching device pressure regulator valve, flow control valve 206 adjust fluxes, being sent to the air that oxygen air mixing device 212 sends with gas blower mixes fully, enter into together hotblast stove 213 heating, be finally fed in blast furnace 214.In Fig. 2 202 is that oxygen compressor entrance stopping valve, 207 is that reverse checkvalve, 208 is that oxygen outlet valve, 209 is that blower inlet air dust remover, 210 is blower inlet air moisture eliminator.
After machine, the shortcoming of oxygen enrichment is: the pressure of the female pipe of air-supply windward is between 0.4-0.5Mpa, according to present Production for oxygen technique, from air separation column, separation of produced oxygen pressure out only has 20-40kpa, can not meet the requirement of oxygen enrichment after blast furnace machine, need to configure special oxygen compressor, the pressure of oxygen, by 20-40kpa, is brought up to 0.7-0.9Mpa.Oxygen compressor pressurizes to oxygen, then, through throttling adjust flux, than gas blower is direct, oxygen is pressurizeed, and need to consume more electric energy, and therefore, the energy consumption of Ji Hou oxygen-enriching device unit Rich Oxygen Amount is higher, and running cost is also higher.Secondly, oxyen manutactory need to configure special oxygen compressor, and the price of oxygen press is quite expensive, and equipment initial investment is higher.
Summary of the invention
For the above-mentioned shortcoming existing in prior art, the object of this invention is to provide a kind of blast furnace blowing engine oxygen enrichment system, safety in the time of can realizing operation inspection shaft valve, object easily.
For achieving the above object, the present invention adopts following technical scheme:
This blast furnace blowing engine oxygen enrichment system, comprise oxygen generating plant, be connected to the forward and backward empty oxygen mixer of machine of gas blower front and back end, and oxygen-enriching device after the front oxygen-enriching device of machine and machine, before machine, oxygen-enriching device one end is connected with oxygen generating plant, and the other end is connected to the front empty oxygen mixer of machine; After machine, oxygen-enriching device one end is also connected with oxygen generating plant, and the other end is connected to empty oxygen mixer after machine.
Before described machine, oxygen-enriching device comprises the front oxygen enrichment pipeline of machine, and the front oxygen flow rate adjusting valve of oxygen installation's oxygen delivery valve, oxygen intake stopping valve, machine, oxygen outlet stopping valve on the front oxygen enrichment pipeline of the machine of being located at successively.
After described machine, oxygen-enriching device comprises oxygen enrichment pipeline after machine, and is located at successively after machine oxygen flow rate adjusting valve, reverse checkvalve, oxygen outlet valve after the oxygen compressor inlet valve on oxygen enrichment pipeline, oxygen compressor, oxygen intake valve, oxygen pressure variable valve, machine.
Before described machine, the empty oxygen mixer the other end is communicated with gas blower air dehumidifying device, gas blower gas inlet strainer successively.
After described machine, the empty oxygen mixer the other end is communicated to hotblast stove, blast furnace successively.
In technique scheme, blast furnace blowing engine oxygen enrichment system of the present invention comprises oxygen generating plant, be connected to the forward and backward empty oxygen mixer of machine of gas blower front and back end, and oxygen-enriching device after the front oxygen-enriching device of machine and machine, before machine, oxygen-enriching device one end is connected with oxygen generating plant, and the other end is connected to the front empty oxygen mixer of machine; After machine, oxygen-enriching device one end is also connected with oxygen generating plant, and the other end is connected to empty oxygen mixer after machine.By common oxygen enrichment before employing machine, after machine, can retain the front oxygen-enriching device of original machine, the plant capacity of oxygen-enriching device after the machine that reduces to need to increase, the expense of the investment of reduction equipment.And by this part Rich Oxygen Amount of oxygen-enriching device oxygen enrichment before machine, still retain the low advantage of unit Rich Oxygen Amount running cost.For whole Rich Oxygen Amount, the Rich Oxygen Amount of some is the oxygen enrichment that adopts low operating cost.Therefore, the running cost that this oxygen enrichment system is total, lower than the running cost of oxygen-enriching device oxygen enrichment after whole machines.
Accompanying drawing explanation
Fig. 1 is the structural representation of the oxygen-enriching device in front of blast-furnace blower of prior art;
Fig. 2 is the structural representation of oxygen-enriching device after the stove blower of prior art;
Fig. 3 is the structural representation of blast furnace blowing engine oxygen enrichment system of the present invention.
Embodiment
Below in conjunction with drawings and Examples, further illustrate technical scheme of the present invention.
Refer to shown in Fig. 3, blast furnace blowing engine oxygen enrichment system of the present invention comprises oxygen generating plant (air separation column) 301, be connected to the forward and backward empty oxygen mixer 306,318 of machine of gas blower 309 front and back ends, and oxygen-enriching device after the front oxygen-enriching device of machine and machine, before machine, oxygen-enriching device one end is connected with oxygen generating plant 301, and the other end is connected to the front empty oxygen mixer 306 of machine; After machine, oxygen-enriching device one end is also connected with oxygen generating plant 301, and the other end is connected to empty oxygen mixer 318 after machine.Before described machine, oxygen-enriching device comprises the front oxygen enrichment pipeline 322 of machine, and the front oxygen flow rate adjusting valve 304 of oxygen installation's oxygen delivery valve 302, oxygen intake stopping valve 303, machine, oxygen outlet stopping valve 305 on the front oxygen enrichment pipeline 322 of the machine of being located at successively.After described machine, oxygen-enriching device comprises oxygen enrichment pipeline 321 after machine, and is located at successively after machine oxygen flow rate adjusting valve 315, reverse checkvalve 316, oxygen outlet valve 317 after the oxygen compressor inlet valve 311 on oxygen enrichment pipeline 321, oxygen compressor 312, oxygen intake valve 313, oxygen pressure variable valve 314, machine.Empty oxygen mixer before described machine, has three interfaces, one of them pick before oxygen enrichment pipeline 322, another is communicated with gas blower air dehumidifying device 308, gas blower gas inlet strainer 307 successively, also has one and is connected on gas blower 309 upstream lines.Empty oxygen mixer 318 after described machine, has three interfaces, one of them pick after oxygen enrichment pipeline 321, another is connected to gas blower 309 and sends on pipeline, also has one to be communicated to successively hotblast stove 319, blast furnace 320.
Before machine, after machine, two cover oxygen-enriching device equipment, are two covering devices of relatively independent parallel connection.On oxygen flow, enrichment rate are controlled, employing be that two covers are independent, non-interfering Controlling System.How many flows of oxygen-enriching device difference oxygen enrichment, how many enrichment rate after the front oxygen-enriching device of machine and machine, by manually arranging separately in the Controlling System of oxygen-enriching device after oxygen-enriching device, machine before machine.
Two cover oxygen-enriching device parallel runnings, the ability that need to reach the highest enrichment rate is 10%.
By blast furnace enrichment rate 10% and gas blower 309, appraise and decide air quantity and calculate, the maximum oxygen enrichment oxygen flow obtaining is 64000m
3/ h.Before machine, after oxygen-enriching device and machine, two capacities of equipment of oxygen-enriching device are added together, and can reach 64000m
3/ h Rich Oxygen Amount, just can meet the requirement of enrichment rate 10%.
If oxygen-enriching device capacity of equipment is 36000m before former machine
3/ h, for oxygen-enriching device before assurance machine is not operation in the limit, before machine, oxygen-enriching device energy strength is pressed 34000m
3/ h, calculates, obtain machine after oxygen-enriching device capacity of equipment need to reach 30000m
3/ h, like this, the total oxygen enrichment ability of common oxygen-enriching device after machine that adds before just can assurance machine reaches 64000m
3/ h.
The operation jointly simultaneously of two covering devices, also can distinguish isolated operation, can obtain following effect:
A, be less than 34000m when the amount of oxygen of blast furnace need of production
3/ h or enrichment rate lower than 6% time, are carried out oxygen enrichment with oxygen-enriching device before machine as far as possible.Its advantage is, do not need oxyen manutactory that middle pressure oxygen is provided, and the energy consumption of unit Rich Oxygen Amount is minimum.
B, be greater than 34000m when the amount of oxygen of blast furnace need of production
3/ h or enrichment rate higher than 6% time, before machine in oxygen-enriching device Controlling System, manually set machine before oxygen-enriching device to blast furnace, provide 30000-34000m
3/ h or enrichment rate are a little less than 6%, and inadequate part is supplemented with oxygen-enriching device after machine.
Such as: rich-oxygen of blast furnace amount needs 60000m
3/ h, can, before machine in oxygen-enriching device Controlling System, adopt the front oxygen-enriching device oxygen enrichment 30000m of artificial setting machine
3/ h also sets oxygen enrichment 30000m after machine in oxygen-enriching device Controlling System
3/ h, just can meet total Rich Oxygen Amount 60000m
3/ h requirement.
Such as: the enrichment rate that blast furnace needs is 9%, just can before machine, in oxygen-enriching device Controlling System, set enrichment rate and be 6% and carry out oxygen enrichment, after machine, in oxygen-enriching device Controlling System, set enrichment rate and be 3% and carry out oxygen enrichment, like this, just can meet enrichment rate and be 9% requirement.
The advantage of such oxygen enrichment in parallel is: first broken through the restriction of 309 pairs of oxygen enrichment enrichment rates of blast furnace blowing engine, meanwhile, only needed oxyen manutactory that the middle pressure oxygen of part is provided, just can reach by the effect after whole machines, the total energy consumption of oxygen enrichment is lower.
Oxygen enrichment oxygen-enriching device before c, machine, after machine, is two cover oxygen-enriching devices in essence, at blast furnace, needs 30000m
3in/h situation, before machine, after machine, oxygen-enriching device can be to rich-oxygen of blast furnace.From energy-conservation, oxygen-enriching device before selector first.Certainly, oxygen-enriching device such processing requirement of also having had the ability after machine, after machine, oxygen-enriching device can be used as the redundant system of oxygen-enriching device before machine, has improved security, the reliability of the oxygen enrichment system of blast furnace blast station.
So, the Rich Oxygen Amount of blast furnace is by 36000m
3/ h brings up to 64000m
3/ h, the highest enrichment rate reaches 10%, and the product iron water amount of blast furnace can improve 300t/d, and its annual earnings are considerable.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and be not used as limitation of the invention, as long as within the scope of connotation of the present invention, to the variation of the above embodiment, modification, all will drop within the scope of claims of the present invention.
Claims (5)
1. a blast furnace blowing engine oxygen enrichment system, is characterized in that:
Comprise oxygen generating plant, be connected to the forward and backward empty oxygen mixer of machine of gas blower front and back end, and oxygen-enriching device after the front oxygen-enriching device of machine and machine, before machine, oxygen-enriching device one end is connected with oxygen generating plant, and the other end is connected to the front empty oxygen mixer of machine; After machine, oxygen-enriching device one end is also connected with oxygen generating plant, and the other end is connected to empty oxygen mixer after machine.
2. blast furnace blowing engine oxygen enrichment system as claimed in claim 1, is characterized in that:
Before described machine, oxygen-enriching device comprises the front oxygen enrichment pipeline of machine, and the front oxygen flow rate adjusting valve of oxygen installation's oxygen delivery valve, oxygen intake stopping valve, machine, oxygen outlet stopping valve on the front oxygen enrichment pipeline of the machine of being located at successively.
3. blast furnace blowing engine oxygen enrichment system as claimed in claim 1, is characterized in that:
After described machine, oxygen-enriching device comprises oxygen enrichment pipeline after machine, and is located at successively after machine oxygen flow rate adjusting valve, reverse checkvalve, oxygen outlet valve after the oxygen compressor inlet valve on oxygen enrichment pipeline, oxygen compressor, oxygen intake valve, oxygen pressure variable valve, machine.
4. blast furnace blowing engine oxygen enrichment system as claimed in claim 1, is characterized in that:
Before described machine, the empty oxygen mixer the other end is communicated with gas blower air dehumidifying device, gas blower gas inlet strainer successively.
5. blast furnace blowing engine oxygen enrichment system as claimed in claim 1, is characterized in that:
After described machine, the empty oxygen mixer the other end is communicated to hotblast stove, blast furnace successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087128.1A CN104060005A (en) | 2013-03-18 | 2013-03-18 | Oxygen enrichment system of blast furnace blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310087128.1A CN104060005A (en) | 2013-03-18 | 2013-03-18 | Oxygen enrichment system of blast furnace blower |
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| CN104060005A true CN104060005A (en) | 2014-09-24 |
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| CN201310087128.1A Pending CN104060005A (en) | 2013-03-18 | 2013-03-18 | Oxygen enrichment system of blast furnace blower |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927575A (en) * | 2016-06-15 | 2016-09-07 | 江苏永钢集团有限公司 | Oxygen enriched air blast system in front of blast furnace blower |
| CN106222343A (en) * | 2016-08-29 | 2016-12-14 | 首钢京唐钢铁联合有限责任公司 | Oxygen enrichment system and method for blast furnace blower |
| 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 |
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Patent Citations (6)
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| JPS59129706A (en) * | 1983-01-18 | 1984-07-26 | Mitsui Eng & Shipbuild Co Ltd | Blast apparatus for blast furnace |
| US6062043A (en) * | 1996-09-25 | 2000-05-16 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for feeding a gas-consuming unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927575A (en) * | 2016-06-15 | 2016-09-07 | 江苏永钢集团有限公司 | Oxygen enriched air blast system in front of blast furnace blower |
| CN106222343A (en) * | 2016-08-29 | 2016-12-14 | 首钢京唐钢铁联合有限责任公司 | Oxygen enrichment system and method for blast furnace blower |
| 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 |
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Application publication date: 20140924 |