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CN103361135B - Steel mill power generation device and method - Google Patents

Steel mill power generation device and method Download PDF

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Publication number
CN103361135B
CN103361135B CN201210091616.5A CN201210091616A CN103361135B CN 103361135 B CN103361135 B CN 103361135B CN 201210091616 A CN201210091616 A CN 201210091616A CN 103361135 B CN103361135 B CN 103361135B
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China
Prior art keywords
steel mill
unit
synthetic gas
power generation
gas
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CN201210091616.5A
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Chinese (zh)
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CN103361135A (en
Inventor
薛俊利
俞平
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Air Products and Chemicals Inc
Original Assignee
General Electric Co
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Priority to CN201210091616.5A priority Critical patent/CN103361135B/en
Priority to PL403349A priority patent/PL229210B1/en
Priority to KR1020130034268A priority patent/KR102076868B1/en
Publication of CN103361135A publication Critical patent/CN103361135A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/26—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension
    • F02C3/28—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension using a separate gas producer for gasifying the fuel before combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/30—Adding water, steam or other fluids for influencing combustion, e.g. to obtain cleaner exhaust gases
    • F02C3/305—Increasing the power, speed, torque or efficiency of a gas turbine or the thrust of a turbojet engine by injecting or adding water, steam or other fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Industrial Gases (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Hydrogen, Water And Hydrids (AREA)
  • Processing Of Solid Wastes (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The present invention relates to a kind of Steel mill power generation device, it comprises: coal water slurry prepares unit, and it receives the waste water of coal and steel mill and prepares coal water slurry; Gasification unit, its gasified coal water slurry comprises the synthetic gas of carbon monoxide and hydrogen to produce; Processing unit, its process synthetic gas is to produce processed synthetic gas; And generator unit, it uses at least part of processed synthetic gas, provides electric power to steel mill.The present invention also relates to corresponding steel mill power generation method.

Description

Steel mill power generation device and method
Technical field
The present invention relates to Steel mill power generation device and method.
Background technology
Because the pressure of world resource shortage increases day by day, people are more and more denseer for the interest of recovery and Resource Recycling Utilization and/or the energy.Such as, No. 04078029.8th, european patent application disclosed in 10 days Mays in 2006 discloses the power generation assembly of the energy that can reclaim blast furnace gas, the byproduct produced when wherein blast furnace gas is blast furnace running in steel industry.No. 201010591337.6th, Chinese patent application disclosed in 8 days June in 2011 then discloses the method for the waste water of process and recycle steel mill.
But, such as from resource and/or the energy conservation aspect of power station and steel mill, also there is room for improvement in prior art, because, for example, power generation assembly disclosed in No. 04078029.8th, above-mentioned european patent application should be not for cost efficiency some applied environment and benefit, simultaneously, method disclosed in No. 201010591337.6th, Chinese patent application comprises the some steps utilizing machinery, chemistry and the multiple technologies means such as biological to carry out recycle waste water, too complicated and expensive.
Therefore, be necessary to provide Steel mill power generation device that is new or that improve and method.
Summary of the invention
The object of this invention is to provide a kind of newly or improve Steel mill power generation device and method.
On the one hand, the present invention relates to Steel mill power generation device, it comprises: coal water slurry prepares unit, and it receives the waste water of coal and steel mill and prepares coal water slurry; Gasification unit, its gasified coal water slurry comprises the synthetic gas of carbon monoxide and hydrogen to produce; Processing unit, its process synthetic gas is to produce processed synthetic gas; And generator unit, it uses at least part of processed synthetic gas, provides electric power to steel mill.
On the other hand, the steel mill power generation method that the present invention relates to comprises: preparing unit to coal water slurry provides the waste water of coal and steel mill to prepare coal water slurry; The described coal water slurry that gasifies in gasification unit is with the obtained synthetic gas comprising carbon monoxide and hydrogen; At processing unit for processing synthetic gas to produce processed synthetic gas; And use at least part of processed synthetic gas in generator unit, produce the electric power being supplied to steel mill.
Accompanying drawing explanation
Be described for embodiments of the invention in conjunction with the drawings, the present invention may be better understood, and element identical in the accompanying drawings uses identical label, and:
Figure 1 shows that the schematic diagram of first embodiment of Steel mill power generation device involved in the present invention.
Figure 2 shows that the schematic diagram of second embodiment of Steel mill power generation device involved in the present invention.
Figure 3 shows that the schematic diagram of the 3rd embodiment of Steel mill power generation device involved in the present invention.
Embodiment
Approximate term in specification sheets is used for modifying quantity, represents that the present invention is not limited to this concrete quantity, also comprises the part of the acceptable correction close with this quantity, and can not cause the change of relevant basic function.Accordingly, modify a numerical value with " approximately ", " about " etc., mean and the invention is not restricted to this exact numerical.In some example, approximate term may correspond to the precision of the instrument measuring numerical value.
Fig. 1 is the schematic diagram of first embodiment of steel mill 2 power generation assembly 1 that the present invention relates to.Power generation assembly 1 comprises coal water slurry and prepares unit 10, and it receives the waste water 11 of coal 12 and steel mill 2 and prepares coal water slurry 13; Gasification unit 14, its gasified coal water slurry 13 comprises the synthetic gas 15 of carbon monoxide (not shown) and hydrogen (not shown) to produce; Processing unit 16, its process synthetic gas 15 is to produce processed synthetic gas 17; Generator unit 18, it uses at least part of processed synthetic gas 17, provides electric power 19 to steel mill 2.
In certain embodiments, waste water 11 mainly comes from the coke oven (not shown) of steel mill 2, thus comprise organic compound (not shown) and the mineral compound (not shown) of relatively high density, usually need before discharging through special disposal.By waste water 11 for the preparation of coal water slurry 13, organic compound is wherein broken down into carbon monoxide and hydrogen in gasification unit 14, and mineral compound changes lime-ash into.By this kind of mode, the waste water 11 of steel mill 2 is without the need to processing and can being used effectively, thus the clear water cost for the preparation of coal water slurry 13 that processing cost and waste water replace all is removed.
In further embodiments, condensed water (not shown) and reuse water (not shown) can be generated with film device (not shown) after concentrated for waste water 11.Condensed water is transported to coal water slurry and prepares in unit 10, and reuse water sends steel mill 2 reuse back to.Thus the expense for special disposal organic compound and mineral compound also can be saved.
If needed, such as, when the quantity not sufficient of waste water 11 is to prepare abundant coal water slurry 13, in further embodiments, also preparing unit 10 for coal water slurry provides clear water (not shown).
In certain embodiments, coal water slurry 13 is converted to synthetic gas 15 and lime-ash (not shown) in gasification unit 14 in oxygen atmosphere.In certain embodiments, oxygen 20 is provided with air gas separation unit 19 to gasification unit 14.
In processing unit 16, the materials such as the particle in removing synthetic gas 15 and hydrogen sulfide are to produce processed synthetic gas 17.Processing unit 16 li can have sulphur absorbing material, such as Polyethylene glycol dimethyl ether, Monoethanolamine MEA BASF, and comprises the oxide compound of a kind of or its arbitrary combination in the metals such as zinc, magnesium, molybdenum, iron, chromium, copper, nickel, cobalt, cerium.In certain embodiments, sulphur adsorbent comprises zinc oxide.In this type of embodiment, the principal reaction in processing unit 16 has:
ZnO+H 2S→ZnS+H 2O (1)。
At least part of processed synthetic gas 17 is for generator unit 18.In certain embodiments, the processed synthetic gas 17 of part supplies steel mill 2, supplementing, in hot rolling running as such as coke furnace gas.
The blast furnace of steel mill runs and produces blast furnace gas.The calorific value of blast furnace gas is generally about 750kcal/Nm 3, lower than the calorific value needed for generator unit, as about 1000kcal/Nm 3.On the other hand, the calorific value of processed synthetic gas is about 2000kcal/Nm 3.In certain embodiments, the blast furnace gas 21 that steel mill 2 produces mixes with described processed synthetic gas 17 at least partly, for the electric power 19 that production steel mill 2 in generator unit 18 uses.
Blast furnace gas 21 also can remove the material such as degranulation and hydrogen sulfide after treatment.Blast furnace gas 21 also can be compressed before mixing with described processed synthetic gas at least partly, reach such as approximately 20-25 air pressure.
Generator unit 18 uses at least part of processed synthetic gas 17 or at least part of processed synthetic gas 17 to be supplied to steel mill 2 with the mixture of blast furnace gas 21 to produce electric power 19.Generator unit 18 can be gas turbine or gas turbine combined cycle device.Gas turbine combined cycle device comprises the gas turbine producing electric power and heat, and the heat using gas turbine to produce is to produce the steam turbine of steam, and the steam-energy obtained promotes steam turbine to produce additional power.In certain embodiments, power generation assembly 1 is integrated gasification combined cycle for power generation equipment.
With reference to Fig. 2, according to second embodiment of the present invention, the air gas separation unit 19 of power generation assembly 1 also provides oxygen 20 for such as converter running to steel mill 2.
With reference to Fig. 3, according to the 3rd embodiment of the present invention, power generation assembly 1 further comprises the collecting carbonic anhydride unit 21 between processing unit 16 and generator unit 18, it is by physical absorption and/or chemical absorption/adsorption process, utilize Polyethylene glycol dimethyl ether, Monoethanolamine MEA BASF, or the adsorbent such as iron, calcium oxide, magnesium oxide or its arbitrary combination, separated from processed synthetic gas 17 by carbonic acid gas, its reaction formula example is as follows:
CO 2+CaO→CaCO 3(2)
Ca(OH) 2+CO 2→CaCO 3+H 2O (3)。
In certain embodiments, collecting carbonic anhydride unit 21 comprises aqueous vapor converting unit (not shown), converts carbon monoxide to carbonic acid gas, its reaction formula as:
H 2O+CO→H 2+CO 2(4)。
Such as ferric oxide, ferrochrome exothermic or other catalyzer can be added in reaction (4).
On the other hand, the present invention relates to steel mill 2 electricity-generating method, it comprises: preparing unit 10 to coal water slurry provides the waste water 11 of coal 12 and steel mill 2 and prepare coal water slurry 13; In gasification unit 14, gasified coal water slurry 13 is to produce the synthetic gas 15 comprising carbon monoxide and hydrogen; Synthetic gas is processed to produce processed synthetic gas 17 in processing unit 16; And in generator unit 18, use at least part of processed synthetic gas 17, provide electric power 19 to steel mill 2.
Power generation assembly 1 utilizes the waste water 11 of steel mill 2 to prepare coal water slurry 13, in certain embodiments, utilize the blast furnace gas 21, of steel mill 2 to be used from generating, thus the resource of steel mill 2 and efficiency of energy utilization is largely increased simultaneously.In certain embodiments, power generation assembly 1 and steel mill 2 can further improve efficiency by common air separating unit 19, reduce total cost.In addition, power generation assembly 1 can provide processed synthetic gas 17 to steel mill 2 according to need.Therefore, utilize the steel mill 2 of power generation assembly 1 can effectively cost-saving, improve resource and efficiency of energy utilization.
Example
Following example can be implemented this invention and provide reference for the people in this area with general technical ability.But these examples are not limited to the scope of claim.
Capacity is that the steel mill of 10MMt/a produces 700000Nm 3/ h, 750kcal/Nm 3blast furnace gas, produce the waste water of 2000t/d at the coking plant of steel mill simultaneously.After concentrated by such as film device, the condensed water of 70t/h injection coal water slurry prepared unit and mixes with the coal of 105t/h, to produce the coal water slurry containing 60wt% solid matter.
Air gas separation unit provides gasification unit and the oxygen needed for steel mill's converter running.Gasification unit produces 40bar air pressure, 240000Nm 3/ h, 2000kcal/Nm 3, containing the synthetic gas of carbon monoxide and hydrogen.
Synthetic gas treated unit removing impurity, such as, after particle and hydrogen sulfide, by the hot rolling unit of processed for part synthetic gas input steel mill, supplementing as coke(oven)gas.
Remaining processed synthetic gas is imported aqueous vapor conversion and collecting carbonic anhydride unit, monoxide conversion is become carbonic acid gas and capturing carbon dioxide, thus significantly reduces the greenhouse gas emission amount of steel mill.
After capturing carbon dioxide, the steel mill's blast furnace gas removing the such as impurity such as particulate and hydrogen sulfide mixes with processed synthetic gas after the pressure being compressed to about 20-25bar.The calorific value of the mixed combustible gas body obtained is about 1000kcal/Nm 3, meet the requirement of the 9E heavy duty gas turbines of such as General Electric Corporation.Mixed combustible gas body is imported in gas turbine to produce the electric power of about 650MW.In this example, steel mill's blast furnace gas obtains directly effective use.In addition, the waste water of the 610000t/h that steel mill discharges is used for gasification, can reduce the cost of the clear water that the cost for wastewater treatment of about 10 yuan/ton and waste water replace.
Although describe the present invention in conjunction with the specific embodiments, those skilled in the art will appreciate that and can make many amendments and modification to the present invention.Therefore, recognize, the intention of claims is to cover all such modifications in true spirit of the present invention and scope and modification.

Claims (7)

1. a Steel mill power generation device, it comprises:
Coal water slurry prepares unit, and it receives the waste water of coal and steel mill and prepares coal water slurry;
Gasification unit, its gasified coal water slurry comprises the synthetic gas of carbon monoxide and hydrogen to produce;
Processing unit, its process synthetic gas is to produce processed synthetic gas;
Generator unit, it uses the mixture of the blast furnace gas of at least part of processed synthetic gas and steel mill, provides electric power to steel mill; And
Air gas separation unit, described air gas separation unit provides oxygen to described gasification unit and described steel mill.
2. Steel mill power generation device as claimed in claim 1, is characterized in that: described processing unit provides part processed synthetic gas to steel mill.
3. Steel mill power generation device as claimed in claim 1, is characterized in that: it comprises the collecting carbonic anhydride unit between processing unit and generator unit further.
4. Steel mill power generation device as claimed in claim 3, is characterized in that: described collecting carbonic anhydride unit comprises aqueous vapor converting unit, and it converts carbon monoxide to carbonic acid gas.
5. Steel mill power generation device as claimed in claim 1, is characterized in that: described generator unit comprises gas turbine combined cycle device.
6. Steel mill power generation device as claimed in claim 1, is characterized in that: described generator unit comprises gas turbine.
7. a steel mill power generation method, it comprises:
Preparing unit to coal water slurry provides the waste water of coal and steel mill to prepare coal water slurry;
The described coal water slurry that gasifies in gasification unit is with the obtained synthetic gas comprising carbon monoxide and hydrogen;
At processing unit for processing synthetic gas to produce processed synthetic gas;
Use the mixture of the blast furnace gas of at least part of processed synthetic gas and steel mill in generator unit, produce the electric power being supplied to steel mill; And
Oxygen is provided to described gasification unit and described steel mill from air gas separation unit.
CN201210091616.5A 2012-03-30 2012-03-30 Steel mill power generation device and method Active CN103361135B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201210091616.5A CN103361135B (en) 2012-03-30 2012-03-30 Steel mill power generation device and method
PL403349A PL229210B1 (en) 2012-03-30 2013-03-28 Arrangement and method of generating power in a steel mill
KR1020130034268A KR102076868B1 (en) 2012-03-30 2013-03-29 System and method for power generation in steel mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210091616.5A CN103361135B (en) 2012-03-30 2012-03-30 Steel mill power generation device and method

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CN103361135B true CN103361135B (en) 2015-10-07

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Publication number Priority date Publication date Assignee Title
KR101953737B1 (en) * 2017-05-30 2019-05-17 한국에너지기술연구원 Method of operating synthetic gas dual fuel engine with gasification system

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CN1141346A (en) * 1996-05-03 1997-01-29 宝山钢铁(集团)公司 Method for prodn. of spongy iron by vertical furnace using coal gas
CN102373099A (en) * 2010-08-20 2012-03-14 新奥科技发展有限公司 Method for coupling coal gasification process and steam turbine power generation process

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KR20030087061A (en) * 2001-04-06 2003-11-12 텍사코 디벨롭먼트 코포레이션 Black water recycle circulation loop use with a gasifier
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Publication number Priority date Publication date Assignee Title
CN1141346A (en) * 1996-05-03 1997-01-29 宝山钢铁(集团)公司 Method for prodn. of spongy iron by vertical furnace using coal gas
CN102373099A (en) * 2010-08-20 2012-03-14 新奥科技发展有限公司 Method for coupling coal gasification process and steam turbine power generation process

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CN103361135A (en) 2013-10-23
PL403349A1 (en) 2013-10-14
KR102076868B1 (en) 2020-02-12
KR20130111431A (en) 2013-10-10
PL229210B1 (en) 2018-06-29

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