CN202849472U - Oxygen-enriched dry gas supply device - Google Patents
Oxygen-enriched dry gas supply device Download PDFInfo
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- CN202849472U CN202849472U CN201220448792.5U CN201220448792U CN202849472U CN 202849472 U CN202849472 U CN 202849472U CN 201220448792 U CN201220448792 U CN 201220448792U CN 202849472 U CN202849472 U CN 202849472U
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Abstract
The utility model relates to the technical field of blast furnace iron-making process, and provides an oxygen-enriched dry gas supply device suitable for a blast furnace iron-making procedure. The oxygen-enriched dry gas supply device is characterized in that a blast furnace blower is connected with a pre-cooler, the pre-cooler is connected with an air cooler, the air cooler is connected with a PSA (pressure swing adsorption) oxygen generation device which is connected with the pre-cooler, and the pre-cooler is connected with a hot blast heater. The oxygen-enriched dry gas supply device disclosed by the utility model fully utilizes devices in the traditional blast furnace iron-making smelting process, directly produces oxygen-enriched dry gas through PSA by gas pressurized by a blast furnace blower outlet and has the characteristics of low device investment and low operation energy consumption.
Description
Technical field
The utility model relates to the blast furnace iron-making process technical field, is specifically related to a kind of feeding mechanism of pressurized air directly being made the oxygen enrichment dry gas that can be used for blast furnace ironmaking.
Background technology
In blast furnace iron-making process, oxygen enriched blast technology and dehumidified blast technology are the strengthening smelting technology of comparatively widespread use.Wherein, oxygen enriched blast mainly is to add industrial oxygen to improve oxygen level in the air blast when air blast, makes oxygen-enriched content in the gas 〉=21%, improves combustion intensity and cupola well tuyere zone temperature of combustion, thereby improves furnace processor and reduce coke ratio.Dehumidified blast then is by removing the moisture in the blast furnace blast, make the humidity of the combustion air that enters blast furnace be reduced to the desired numerical value of optimum operation and keep stable, thereby play the effect that improves dry-air blast temperature, stable furnace condition, increase coal powder blowing amount, reduces coke ratio.
At present, common oxygen enrichment adding method mainly is that independently PSA(pressure-variable adsorption is set before blast furnace blowing engine in the oxygen enriched blast technology) or the VPSA(Vacuum Pressure Swing Adsorption) oxygenerator, and before blast furnace blowing engine, add made oxygen enrichment in the import airduct, perhaps, independently PSA or the made oxygen enrichment of the VPSA oxygenerator cold-air duct between blast furnace blowing engine and snorting valve after the oxygen compressor pressurization is added.
CN03117856.1, denomination of invention discloses the compression-expansion Deep Cooling Method of a kind of PSA of employing or VPSA absorption method and normal pressure output oxygen and the membrane separation process air separation facility provides oxygen enrichment for blast furnace ironmaking oxygen-enriched coal spray technique the oxygen that supplies for the Chinese invention patent of " the confession oxygen of blast furnace ironmaking oxygen-enriched coal spray ".This technical scheme mainly is: be added in during oxygen supply before the blast furnace blowing engine suction port together to be sucked by blast furnace blowing engine with air and be mixed into the required oxygen enrichment of oxygen enriched blast coal injection iron-smelting process and send into blast furnace, or after pressurization, send in the blast main of blast furnace blowing engine outlet with the gas blower pressurization after air mixed send into blast furnace after evenly.Still there is following shortcoming in this confession oxygen: owing to adopt air compressor machine or vacuum unit in the preparation oxic process, it is larger that oxygen enrichment prepares energy consumption, and as adding the mode of oxygen enrichment behind the employing blast furnace blowing engine, then also need increase oxygen compressor boosts, energy consumption and investment also need further to improve, and complete assembly system operation energy consumption is high, occupation area of equipment is large, and investment is large.
And with regard to dehumidified blast, the current method that then mainly adopts gas blower suction side cooling dehumidification, this dehumidification method need increase freezing unit, and investment is high, and operation energy consumption is higher.
CN200910103264.9, denomination of invention discloses a kind of back dehumidifying device of stove blower for the Chinese invention patent of " a kind of back dehumidifying device of stove blower ", its technical scheme mainly is: by dehumidifying device being placed on blast furnace blowing engine outlet, the air of the High Temperature High Pressure of blast furnace blowing engine outlet is carried out precooling, dehumidification and backheat successively.But this technical scheme does not take full advantage of blast furnace blowing engine, still air directly can not be made the oxygen enrichment dry gas that can be used for blast furnace ironmaking, but need to satisfy by the mode of external interpolation oxygen enrichment the requirement of the oxygen enrichment dry gas that can be used for blast furnace ironmaking.
CN98228550.7, the utility model patent that name is called " a kind of oxygen-enriched combustion device for glass bead kiln " discloses a kind of oxygen-enriched combustion device for glass bead kiln, by gas blower, oxygen-enriched generator, water-ring vacuum pump, air water separator, dehumidification case, gas-water separation case, booster fan, reversing system, preheater, nozzle, air purifier, airduct be flexible coupling, drain bucket forms, utilize membrane oxygen enrichment technology, 28～35%O is provided
2The oxygen-rich air of content is with Sweet natural gas mixed firing.This technical scheme only is only applicable to specific glass bead kiln, adopt membrane oxygen enrichment technology, send into air by gas blower, need simultaneously to provide in conjunction with water-ring vacuum pump the enough pressure reduction of embrane method oxygen enrichment processed, and by booster fan to made oxygen enrichment supercharging to satisfy the pressure of subsequent request.Therefore, still there is the shortcoming that the power-equipment investment is large, energy consumption is high in this oxygen-enriched burning device, and is not suitable for blast furnace ironmaking.
Therefore, consider whole blast furnace ironmaking oxygen enriched blast air feed flow process, and prepare the angle of energy consumption and dehumidification energy consumption from reducing oxygen enrichment, be necessary to set up the new blast furnace ironmaking oxygen enrichment dry gas supply technique in conjunction with dehumidification usefulness, to take full advantage of existing device in the existing blast furnace iron-making process, under the prerequisite that guarantees oxygen-enriched content, reduce cost and running cost, save energy consumption.
The utility model content
The utility model is intended to overcome the shortcoming of above-mentioned prior art, and a kind of oxygen enrichment dry gas feeding mechanism that adapts with blast furnace ironmaking strengthening smelting process is provided.This device takes full advantage of the equipment in the existing blast furnace ironmaking smelting technology, will be through the air after the blast furnace blowing engine outlet supercharging, directly prepare the oxygen enrichment dry gas through PSA oxygen processed unit, having changed needs external interpolation oxygen enrichment to produce the oxygen enrichment dry gas in the prior art, possess the characteristics that facility investment is low, operation energy consumption is low.
For solving above technical problem, technical scheme provided by the utility model is as follows:
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, pre-cooler, air cooler, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; Air after the blast furnace blowing engine supercharging cools through pre-cooler, air cooler, enters PSA oxygen processed unit again and obtains the oxygen enrichment dry gas, and gained oxygen enrichment dry gas is got back to pre-cooler and heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
Described oxygen enrichment dry gas feeding mechanism also comprises air water separator, and described pre-cooler connects air cooler, and air cooler connects air water separator, and air water separator connects PSA oxygen processed unit, and PSA oxygen processed unit connects pre-cooler; Air after the blast furnace blowing engine supercharging cools through pre-cooler, air cooler, and the gas after the cooling is deviate from the moisture in the gas in air water separator, enters PSA oxygen processed unit again and obtains the oxygen enrichment dry gas.
Described PSA oxygen processed unit adopts a plurality of adsorption towers in parallel, is filled with successively dehydrated adsorbent and oxygen molecular sieve processed in the adsorption tower from bottom to top, with adsorbing and removing minor amount of water and nitrogen.
Described adsorption tower, each adsorption tower operation steps comprise successively absorption, drop pressure, along put, inverse put, flushing, boost pressure, gas product boost.The staggered absorption of a plurality of adsorption towers and regeneration, thus make air be able to dehumidification and be prepared into the oxygen enrichment dry gas.Prepared oxygen enrichment dry gas is compared with the mode that oxygen enrichment is added in the outside, and its oxygen level is greatly enhanced, and is convenient to adjusting, stability height.
The oxygen level of described oxygen enrichment dry gas by volume per-cent greater than 21%, dew-point temperature below-10 ℃, humidity is less than 2 g/m
3
The beneficial effects of the utility model are:
1, the utility model device adopts PSA oxygen processed unit to be positioned over after the exit end of blast furnace blowing engine, take full advantage of the elevated pressures of the outlet air that blast furnace blowing engine provides, directly with air pressure-variable adsorption oxygen enrichment processed, make the process simplification of follow-up oxygen enrichment processed, need not to add such as power-equipments such as air compressor machine or vacuum units, PSA is set independently or VPSA oxygen-enriching device processed is compared with at present commonly used, optimized facility investment, significantly reduced the energy consumption of oxygen enrichment preparation process, very effectively reduced the preparation energy consumption of oxygen enrichment dry gas, improve the economy of blast furnace ironmaking device, possessed low facility investment, the characteristics of low operation energy consumption.
2, the utility model adopts the mode that pre-cooler and blast furnace blowing engine are connected with PSA oxygen processed unit.The pre-cooler has here been brought into play following effect: the air of (1) blast furnace blowing engine outlet is lowered the temperature through pre-cooler first, enters air cooler again and again lowers the temperature, to satisfy the processing requirement of PSA; (2) pre-cooler oxygen enrichment dry gas that PSA is made heats up to the oxygen enrichment dry gas as heat-eliminating medium, has effectively utilized the heat of blower export gas, thereby has reached energy-conservation purpose.
3, the utility model adopts pre-cooler to connect air cooler, and the method for air water separator is set behind air cooler, elevated pressures and the temperature of the outlet air that blast furnace blowing engine provides have been utilized well, the air dehumidification is processed be need not to add freezing unit, optimized facility investment, significantly reduced the energy consumption that the air dehumidification is processed, thereby very effectively reduced the preparation energy consumption of oxygen enrichment dry gas, further improve the economy of blast furnace ironmaking device, and formed blast furnace ironmaking oxygen enrichment dry gas supply technique in conjunction with dehumidification usefulness with this.
4, the utility model adopts the PSA oxygen processed unit of a plurality of adsorption tower parallel connections, the staggered absorption of a plurality of adsorption towers and regeneration, and the moisture in the deaerated and nitrogen satisfy the requirement of the oxygen enrichment dry gas of producing high density well.Prepared oxygen enrichment dry gas is compared with the mode that oxygen enrichment is added in the outside, and its oxygen level is greatly enhanced, and is convenient to adjusting, stability height.
Description of drawings
Fig. 1 is the oxygen enrichment dry gas feeding mechanism structure iron of the blast furnace ironmaking implemented according to the utility model content.
Fig. 2 is the oxygen enrichment dry gas feeding mechanism structure iron of the blast furnace ironmaking of the utility model embodiment 2.
Embodiment
Embodiment 1
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, pre-cooler, air cooler, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; Air after the blast furnace blowing engine supercharging cools through pre-cooler, air cooler, enters PSA oxygen processed unit again and obtains the oxygen enrichment dry gas, and gained oxygen enrichment dry gas is got back to pre-cooler and heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
The gauge pressure pressure of described blast furnace blowing engine outlet air is 0.25MPa.
Described PSA oxygen processed unit adopts a plurality of adsorption towers in parallel, is filled with successively dehydrated adsorbent and oxygen molecular sieve processed in the adsorption tower from bottom to top, with adsorbing and removing minor amount of water and nitrogen.
Described adsorption tower, each adsorption tower operation steps comprise successively absorption, drop pressure, along put, inverse put, flushing, boost pressure, gas product boost.
Air themperature before the described PSA of the entering oxygen processed unit is below 85 ℃.
The atmospheric moisture that enters before the PSA oxygen processed unit is 5～10g/m
3
The dew-point temperature of described oxygen enrichment dry gas is below-10 ℃, and oxygen level is greater than 21%, and humidity is less than 2g/m
3
The utility model takes full advantage of the most important power-equipment of blast furnace---blast furnace blowing engine, not only directly produce the required oxygen of blast-furnace smelting by oxygen enrichment dry gas feeding mechanism described in the utility model, and provide and overcome the required aerodynamic force of blast furnace stock column resistance, need not be with the mode of the adding oxygen enrichment oxygen enrichment dry gas as blast furnace ironmaking.
Embodiment 2
As a same reason, such as embodiment 1
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, pre-cooler, air cooler, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler by pipeline, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; The gauge pressure pressure of described blast furnace blowing engine outlet air is 0.35Mpa, and the air themperature before the described PSA of the entering oxygen processed unit is 85 ℃, and humidity is 10g/m
3, obtaining dew-point temperature and be-10 ℃, oxygen level 23%, humidity are 1.92 g/m
3The oxygen enrichment dry gas, gained oxygen enrichment dry gas is got back to pre-cooler and is heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
Described oxygen enrichment dry gas feeding mechanism also comprises air water separator, and described pre-cooler connects air cooler, and air cooler connects air water separator, and air water separator connects PSA oxygen processed unit, and PSA oxygen processed unit connects pre-cooler; Air after the blast furnace blowing engine supercharging cools through pre-cooler, air cooler, and the gas after the cooling is deviate from the moisture in the gas in air water separator, enters PSA oxygen processed unit again and obtains the oxygen enrichment dry gas.
Embodiment 3
As a same reason, as aforementioned
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, water cooler, air water separator, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler by pipeline, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; The gauge pressure pressure 0.45Mpa of described blast furnace blowing engine outlet air, the air themperature before the described PSA of the entering oxygen processed unit is 75 ℃, humidity is 8g/m
3, obtaining dew-point temperature and be-20 ℃, oxygen level 22%, humidity are 0.76 g/m
3The oxygen enrichment dry gas, gained oxygen enrichment dry gas is got back to pre-cooler and is heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
Embodiment 4
As a same reason, as aforementioned
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, water cooler, air water separator, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler by pipeline, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; The gauge pressure pressure 0.58Mpa of described blast furnace blowing engine outlet air, the air themperature before the described PSA of the entering oxygen processed unit is 65 ℃, humidity is 6g/m
3, obtaining dew-point temperature and be-30 ℃, oxygen level 23%, humidity are 0.28 g/m
3The oxygen enrichment dry gas, gained oxygen enrichment dry gas is got back to pre-cooler and is heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
Embodiment 5
As a same reason, as aforementioned
A kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking, comprise blast furnace blowing engine, water cooler, air water separator, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler by pipeline, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove; The gauge pressure pressure of described blast furnace blowing engine outlet air is 0.75Mpa, and the air themperature before the described PSA of the entering oxygen processed unit is 80 ℃, and humidity is 5g/m
3, obtaining dew-point temperature and be-40 ℃, oxygen level 24%, humidity are 0.09 g/m
3The oxygen enrichment dry gas, gained oxygen enrichment dry gas is got back to pre-cooler and is heated up, and then enters hotblast stove and is sent to blast furnace as combustion-supporting.
The utility model has utilized the elevated pressures of the outlet air that blast furnace blowing engine provides well, make follow-up air dehumidification processing and pressure-variable adsorption oxic process processed all need not to add as freezing unit, air compressor machine, oxygen compressor, the power-equipments such as vacuum pump, thereby with present PSA(or the VPSA of independently arranging commonly used) oxygen-enriching device processed and method of cooling dehumidifying device compare, optimized facility investment, significantly reduced the energy consumption of the processing of air dehumidification and oxic process processed, very effectively reduced the preparation energy consumption of oxygen enrichment dry gas, improved the economy of blast furnace ironmaking device, and form with this and can satisfy simultaneously oxygen enriched blast and dehumidified blast requirement, possess low facility investment, the oxygen enrichment dry gas supply chain of low operation energy consumption characteristics.
Claims (3)
1. oxygen enrichment dry gas feeding mechanism that is used for blast furnace ironmaking, comprise blast furnace blowing engine, pre-cooler, air cooler, PSA oxygen processed unit and hotblast stove, it is characterized in that: described blast furnace blowing engine connects pre-cooler, pre-cooler connects air cooler, air cooler connects PSA oxygen processed unit, PSA oxygen processed unit connects pre-cooler, and pre-cooler connects hotblast stove.
2. a kind of oxygen enrichment dry gas feeding mechanism for blast furnace ironmaking according to claim 1, it is characterized in that: described oxygen enrichment dry gas feeding mechanism also comprises air water separator, described pre-cooler connects air cooler, air cooler connects air water separator, air water separator connects PSA oxygen processed unit, and PSA oxygen processed unit connects pre-cooler.
3. according to claim 1 or 2 described a kind of oxygen enrichment dry gas feeding mechanisms for blast furnace ironmaking, it is characterized in that: described PSA oxygen processed unit, adopt a plurality of adsorption towers in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220448792.5U CN202849472U (en) | 2012-09-05 | 2012-09-05 | Oxygen-enriched dry gas supply device |
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| CN201220448792.5U CN202849472U (en) | 2012-09-05 | 2012-09-05 | Oxygen-enriched dry gas supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808053A (en) * | 2012-09-05 | 2012-12-05 | 李东林 | Oxygen-rich dry gas supply device for blast furnace iron-making |
| CN103868346A (en) * | 2014-03-17 | 2014-06-18 | 济南市平阴县玛钢厂 | Oxygen-enriched nitrogen supply system for cupola furnace |
-
2012
- 2012-09-05 CN CN201220448792.5U patent/CN202849472U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808053A (en) * | 2012-09-05 | 2012-12-05 | 李东林 | Oxygen-rich dry gas supply device for blast furnace iron-making |
| CN103868346A (en) * | 2014-03-17 | 2014-06-18 | 济南市平阴县玛钢厂 | Oxygen-enriched nitrogen supply system for cupola furnace |
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| GR01 | Patent grant | ||
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Granted publication date: 20130403 |