CN1898515A - Air-separation apparatus, integrated air-separation and metal-production apparatus and method of starting one such air-separation apparatus - Google Patents

Air-separation apparatus, integrated air-separation and metal-production apparatus and method of starting one such air-separation apparatus Download PDF

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Publication number
CN1898515A
CN1898515A CNA2004800383893A CN200480038389A CN1898515A CN 1898515 A CN1898515 A CN 1898515A CN A2004800383893 A CNA2004800383893 A CN A2004800383893A CN 200480038389 A CN200480038389 A CN 200480038389A CN 1898515 A CN1898515 A CN 1898515A
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Prior art keywords
air
equipment
metal
production apparatus
tower
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CNA2004800383893A
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CN100473929C (en
Inventor
J-J·肖拉
A·吉亚尔
A·利巴雷
X·庞顿
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04818—Start-up of the process
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04024—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of purified feed air, so-called boosted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
    • F25J3/04133—Electrical motor as the prime mechanical driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04139—Combination of different types of drivers mechanically coupled to the same compressor, possibly split on multiple compressor casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04381—Details relating to the work expansion, e.g. process parameter etc. using work extraction by mechanical coupling of compression and expansion so-called companders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/0446—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases
    • F25J3/04466—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using the heat generated by mixing two different phases for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
    • F25J3/04551—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the metal production
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
    • F25J3/04593—The air gas consuming unit is also fed by an air stream
    • F25J3/046—Completely integrated air feed compression, i.e. common MAC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/42—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen

Abstract

The invention relates to an air-separation apparatus comprising a system of columns (DC, CM), means for supplying the apparatus at least partially with compressed air from at least one supercharger (C2), air-scrubbing and -cooling means (E, LE), means for conveying the air to a column (CM) in the system of columns, and means for drawing off a gaseous product (O) from a column in said system, the aforementioned supercharger being driven by a motor (M) having a variable rotation speed and at least two nominal speeds.

Description

The air separation of air separation equipment, one and metal-production apparatus and the method for starting this air separation equipment
Technical field
The present invention relates to air separation/metal-production apparatus and a kind of method of starting this air separation equipment of a kind of air separation equipment, a kind of one.
Background technology
As in " the Steel Times International " that published the 2-3 month in 2003 by described in the articles that the people write such as Capogrosso " Optimized Steel Production with Oxygen for BlastFurnaces at ILVA; Taranto Works; Italy ", knownly will supply to air separation equipment from the compressed air of blast furnace blower at least in part.Then, the oxygen that this air separation equipment is produced mixes, heats with remaining air from air blast and delivers to blast furnace.
Often need be to the portion of air supercharging that also will send into air separation equipment from air blast.
Described article points out that air can come free a plurality of air blast compressed and supplied air header (r é seau).
In US-A-5 244 489, US-A-6 089 040, US-A-6 119 482 and US-A-6 122932, the air separation equipment that is suitable for supplying with blast furnace has been described.
In order to start blast furnace, at first need to open air blast.The pressure of air is elevated to the pressure that allows the booster compressor starting gradually, and described booster (surpresseur) is used for compressed air and separates employed air.
Can start booster compressor rapidly transmitting oxygen to consumer device (blast furnace) as soon as possible, thereby blast furnace can move normally, obviously is very important.
Summary of the invention
The objective of the invention is to reduce the minimum air pressure that booster compressor can bring into operation.
A theme of the present invention is a kind of air separation equipment, this equipment comprises Tower System, be used for will supplying to from the compressed air of at least one booster compressor at least in part the device of this equipment, be used for purifying and cooling off air device, be used for air is delivered to the device of a tower of Tower System and the device that is used for extracting from a tower of Tower System gaseous product, it is characterized in that described booster compressor is driven by the variable speed electric motors, particularly with at least two kinds of rated speeds.
The variation of supply frequency and/or load is meant that in fact the motor with rated speed x rotates in the scope of maximum ± 5% around this speed.
-this equipment comprises the device that is used for supplying with to motor the frequency-changing AC electric current;
-this equipment comprises multispeed electric machine;
-motor for have Dahlander (Da Lande) winding of single main winding-especially-type or for having the type of a plurality of main windings.
Another theme of the present invention is a kind of air separation/metal-production apparatus of one, this equipment comprise air separation equipment, metal-production apparatus, compression be used for the air of air separation equipment and be used for the air of metal-production apparatus compressor, be used for and will deliver to the device of booster from the air of compressor and be used for and will deliver to the device of metal-production apparatus from the gaseous product of air separation equipment, wherein, described air separation equipment is a type mentioned above.
Another theme of the present invention is a kind of method of starting air separation/metal-production apparatus, this equipment comprises Tower System, be used for compressed air supply to booster device, be used for the air of automatic pressure intensifier in the future deliver to Tower System at least one tower device and be used for extracting gaseous product to deliver to the device of metal-production apparatus from a tower of Tower System, the method is characterized in that, described booster is driven by variable speed electric motors, particularly, and motor in metal-production apparatus speed during starts greater than the speed during this equipment stable operation.
According to other optional aspect:
-motor is with a kind of rotation in two kinds of speed, and motor during starts rotates with first speed and rotates with second speed during this equipment stable operation at metal-production apparatus, and first speed is greater than second speed;
-supply with alternating current to motor, this electric current is higher than frequency during equipment stable operation in metal-production apparatus frequency during starts;
-to motor supply frequency conversion electric current; And
-motor comprises a plurality of windings that carry out different connections according to the operation of equipment.
In addition, another theme of the present invention is the method for aforementioned type, wherein, supply with air to air separation equipment and metal-production apparatus from compressor, and to the gaseous product of metal-production apparatus supply from air separation equipment, in the method, at first the compressor of two equipment is supplied with in starting, then according to aforementioned starting method starting air separation equipment.
Can adjust rotating speed of motor by distinct methods:
-for machine or have the machine of a plurality of main windings, can change number of pole-pairs with single main winding (have Dahlander type winding connect);
-can use dynamo-electric frequency converter or static frequency changer to change the frequency of the supply voltage of stator; And
-can change the supply voltage of stator by rotor being used slidingtype rheostat or use tandem feedback (cascade der é cup é ration), thus slip changed.
All pressure of mentioning all are absolute pressure.
Description of drawings
Describe the present invention below with reference to accompanying drawings in more detail, accompanying drawing illustrates according to of the present invention and schematic diagram blast furnace all-in-one-piece air separation equipment.
The specific embodiment
Fig. 1 illustrates metal treatment facility-in this example and is blast furnace FM-and air distillation installation, this air distillation installation comprises exchange pipeline LE, double tower DC and mixing column CM, blast furnace and air distillation installation be all by air blast S air supply, this air blast usually less than 6 crust-usually between 3 crust and 5.5 crust-pressure under generation greater than 100000Nm 3/ h (Sm 3/ h) air.Air blast S can supply with miscellaneous equipment.The air that is used for blast furnace FM be heated and deliver to blast furnace after Oxygen Flow O from air separation equipment mixes.
In the phase I, air distillation installation shown in Figure 1 is used for being different from the 2-6 crust of 7 crust-for example, perhaps than high at least 2 crust of 7 crust and may be up to 14 crust, preferably between 9 crust and 14 crust-setting pressure P under the oxygen of production low-purity, for example purity is 80%-97%, is preferably 85%-95%.Two destilling towers (double tower) DC itself comprises medium pressure column MP, lower pressure column BP and main condenser/evaporimeter.Tower MP and BP move under the pressure of about 6 crust and about 1.2 crust respectively usually.
As described in detail among document US-A-4 022 030, mixing column is the tower identical with the destilling tower structure, but is used for will mixing with the more not volatile liquid of introducing at the top of tower at the more volatile gas of the bottom of tower introducing to be close to turnover mode.
This mixes the generation cooling power, therefore makes to reduce the energy consumption relevant with distillation.In this example, this mixing also can be advantageously used in directly produces impure oxygen under pressure P, as mentioned below.
The air that is used to distill purifies by cooler R cooling and by cleaning equipment E.Then, this air is divided into two strands of air-flows.Air-flow L is pressurized to 6 * 10 in booster C2 5Pa, cooling and be incorporated into the bottom of mixing column CM in exchange pipeline LE then.
Another strand air-flow J is sent to exchange pipeline LE, partly cooling and separated into two parts.A part is delivered to medium pressure column MP after the cold junction until the exchange pipeline is cooled; Another part expand into low pressure in turbine t, inject lower pressure column BP at the place, centre position then.
Booster C2 is driven by the variable speed electric motors, particularly M with at least two kinds of normal speeds.This motor can be published " Memotech Electrotechnique de Bourgeois etCogniel " the 295th page of described Dahlander type with two or three speed as Educalivre.At metal-production apparatus during starts, the speed of motor is greater than the speed of motor during this equipment stable operation.Alternatively, booster also can be by turbine-for example steam turbine-driving.
After expanding in expansion valve, " rich solution " (oxygen-enriched air) that extracts from the bottom of tower MP be incorporated among the tower BP in close air injection phase.The top that " lean solution " (the impure nitrogen) that extracts from the centre position of tower MP expands expansion valve and introduces tower BP afterwards.The gaseous nitrogen possible free from foreign meter of the nitrogen N of constitution equipment waste gas and the middle pressure that produces at the top of tower MP is exchanging among the pipeline LE and is being heated and discharges from this equipment.
Extract the liquid oxygen that its purity depends on the setting of double tower DC from the bottom of tower BP, consider pressure drop to be pressurized to pressure P 1 (P1-P is for example less than 1 * 10 a little more than aforementioned pressure P by pump W 5And the top of introducing tower CM Pa).Therefore, P1 is advantageously in 4-6 * 10 5Pa and 30 * 10 5Between the Pa, preferably 8 * 10 5Pa and 16 * 10 5Between the Pa.What extract from mixing column CM is following three kinds of fluids: in the bottom of tower, near rich solution and the liquid that converges via pipeline that is provided with expansion valve and rich solution; In the centre position, deliver to the centre position mixture place, that form by oxygen and nitrogen basically of lower pressure column BP via the pipeline that is provided with expansion valve; At the top of tower, the impure oxygen that approximately discharge as finished product gas O from this equipment via pipeline with pressure P the heating back in the exchange pipeline.
Fig. 1 also illustrates the supplementary heat exchanger of the available refrigeration of fluid circulation that is used for reclaimer.
In example shown in Figure 2, the air of the compression distillation that is useful in the booster C1 that drives by variable speed electric motors, particularly M.Then, pressurized air purifies in cleaning equipment E, cooling and separated into two parts.Part of air is pressurized to the pressure of mixing column CM in the booster c that is connected to air blast turbine (turbine d ' insufflation) t, the part of remaining air is fed among the described air blast turbine t.
Other parts of this accompanying drawing are identical with Fig. 1's.
In Fig. 3, as among Fig. 2, the air of the distillation that is useful on compresses in the booster C1 that is driven by variable speed electric motors, particularly M.Then, pressurization gas purifies in cleaning equipment E, and a part of L that purifies air also be connected to a motor M '-may for variable speed electric motors, particularly-the second booster C2 in be pressurized to mixing column pressure.The cooling and be sent to mixing column CM in exchange pipeline LE of this part air.Remaining air J from cleaning equipment is partly cooled off and separated into two parts.Part of air is sent to turbine t, delivers to lower pressure column BP then.Remaining air continues cooling and delivers to medium pressure column with gaseous form in exchange pipeline LE.
Turbine t is driven by low pressure nitrogen compressor c.
Also it is contemplated that and utilize air blast to supply with double tower, and come or other unit feeding mixing column by dedicated compressor.
Booster can be used for supplying with mixing column.

Claims (10)

1. air separation equipment, comprise: Tower System (MP, BP, CM), being used at least in part will be from least one booster (C1, C2) compressed air supply to this equipment device, be used to purify and cool off the device (E of air, LE), be used for air is delivered to a tower (CM of Tower System, MP) device and the device that is used for extracting gaseous product (O) from a tower of Tower System, it is characterized in that, described booster is driven by the variable speed electric motors, particularly with at least two kinds of rated speeds (M, M '); This equipment comprises the device that is used for to motor supply frequency-changing AC electric current.
2. equipment according to claim 1 is characterized in that, this equipment comprises multispeed electric machine (M, M ').
3. equipment according to claim 1 and 2 is characterized in that, described motor (M, M ') for have the Dahlander winding of single main winding-especially-type or for having the type of a plurality of main windings.
4. air separation/the metal-production apparatus of an one, comprise air separation equipment, metal-production apparatus (FM), compression be used for the air of air separation equipment and be used for the air of metal-production apparatus compressor (S), be used for and will deliver to booster (C1 from the air of compressor, C2) device and be used for and deliver to the device of metal-production apparatus from the gaseous product (O) of air separation equipment, wherein, described air separation equipment is that each is described in the claim 1 to 3.
5. the method for a starting air separation/metal-production apparatus, wherein, this equipment comprises Tower System, be used for compressed air is supplied to booster (C1, C2) device, the air that is used for the automatic pressure intensifier in future is delivered at least one tower (MP of Tower System, CM) device and be used for extracting gaseous product (O) to deliver to the device of metal-production apparatus from tower of Tower System, described booster is by variable speed electric motors, particularly (M, M ') drives, the method is characterized in that, motor in metal-production apparatus speed during starts greater than the speed during this equipment stable operation.
6. method according to claim 5, it is characterized in that, described motor (M, M ') with a kind of rotation in two kinds of speed, motor during starts rotates with first speed and rotates with second speed during this equipment stable operation at metal-production apparatus (FM), and first speed is greater than second speed.
7. method according to claim 6 is characterized in that, supplies with alternating current to described motor, and this electric current is higher than frequency during this equipment stable operation in metal-production apparatus (FM) frequency during starts.
8. method according to claim 7 is characterized in that the frequency of described electric current is variable.
9. method according to claim 7 is characterized in that, described motor (M, M ') comprises according to the operation of equipment and a plurality of windings of differently connecting.
10. according to each described method in the claim 5 to 9, it is characterized in that, supply with air to described air separation equipment and metal-production apparatus (FM) from compressor (S), and to the gaseous product (O) of described metal-production apparatus supply from air separation equipment, in the method, at first the compressor (S) of two equipment is supplied with in starting, then according to each starting air separation equipment in the claim 6 to 10.
CNB2004800383893A 2003-12-22 2004-12-16 Air-separation and metal-production apparatus and method for starting the same Expired - Fee Related CN100473929C (en)

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FR0351157A FR2864214B1 (en) 2003-12-22 2003-12-22 AIR SEPARATION APPARATUS, INTEGRATED AIR SEPARATION AND METAL PRODUCTION APPARATUS AND METHOD FOR STARTING SUCH AIR SEPARATION APPARATUS

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BRPI0417962A (en) 2007-03-27
WO2005064251A1 (en) 2005-07-14
FR2864214A1 (en) 2005-06-24
RU2006126668A (en) 2008-01-27
JP4809243B2 (en) 2011-11-09
CN100473929C (en) 2009-04-01
US20070186582A1 (en) 2007-08-16
EP1709378A1 (en) 2006-10-11
FR2864214B1 (en) 2017-04-21

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