CN105112606A - Steelmaking system - Google Patents
Steelmaking system Download PDFInfo
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- CN105112606A CN105112606A CN201510435982.1A CN201510435982A CN105112606A CN 105112606 A CN105112606 A CN 105112606A CN 201510435982 A CN201510435982 A CN 201510435982A CN 105112606 A CN105112606 A CN 105112606A
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- power generation
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- steelmaking
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a steelmaking system. The steelmaking system comprises a coal coking system, a raw material sintering system, a steel and iron smelting system and a power generation system, wherein the coal coking system and the raw material sintering system are both connected with the steel and iron smelting system; the power generation system is respectively connected with the coal coking system and the steel and iron smelting system; and the power generation system uses coke oven gas generated by the coal coking system and blast furnace gas generated by the steel and iron smelting system for generating electricity. The coal coking system, the raw material sintering system, the steel and iron smelting system and the power generation system cooperatively work to guarantee effective and reasonable utilization of resources. An afterheat boiler and the power generation device can realize the recycling of afterheat, so that the resources are effectively saved, and the pollution generated by coal consumption due to heating and power generation is effectively relieved to achieve an environmental protecting effect. A coke drying quenching furnace uses cold nitrogen from an oxygen production factory for cooling high-temperature coke, so that the energy is effectively saved, and more wastes of the resources are reduced.
Description
Technical field
The invention belongs to field of metallurgy, be specifically related to a kind of steelmaking system.
Background technology
Due to a lot of raw material and product can be related in steelmaking process, existing a lot of steelmaking system effectively can not utilize raw material and the product of each side, the reasonable disposition of resource can not be carried out, cause the waste of resource, so, need a kind of raw material that effectively can utilize each stage, carry out the production system of making steel.Be exactly in addition, existing steel-making can produce a lot of waste heat, these waste heats comprise circulating water afterheat resource, steam waste heat resource, fume afterheat resource and metallurgical slag residual heat resources, and these residual heat resources are difficult to be used effectively, and especially, the recovery utilization rate of low-temperature flue gas waste heat is lower.
Summary of the invention
The technical problem that can not make full use of resource to solve in prior art, effectively can not utilize residual heat resources, the object of this invention is to provide a kind of steelmaking system.
In order to solve above technical problem, technical scheme of the present invention is:
A kind of steelmaking system, comprise coking of coal system, raw material sintering system, smelting iron and steel system and power generation system, wherein, coking of coal system is all connected with smelting iron and steel system with raw material sintering system, described power generation system is connected with coking of coal system and smelting iron and steel system respectively, the coke-oven gas that power generation system utilizes coking of coal system to produce and the Power Generation by BF Gas that smelting iron and steel system produces.
Preferably, described smelting iron and steel system comprises interconnective blast furnace and converter, and blast furnace is connected with described raw material sintering system.Iron ore, through oversintering, forms bulk, is convenient to smelt in blast furnace, prevents breeze meticulous about smelting and the impact of metallurgical effect.
Preferred further, described smelting iron and steel system also comprises Solid state fermentation device, and described Solid state fermentation device is connected with heating system and blast furnace respectively.The high temperature washing slag water that Solid state fermentation device produces is used for heating, make use of the high-temperature residual heat of waste residue further, and being used for heating more can effective fuel economy, more avoids the environmental pollution because fuel combustion brings.
Preferably, described coking of coal system comprises the process furnace, the carbide furnace that connect successively and dryly puts out stove, and the dry stove that puts out is connected with described blast furnace.Coking of coal system is connected with blast furnace, directly the coal that coking is good is transported to blast furnace, adds integration and the automatization of system.
Preferred further, the described dry stove that puts out is connected with the first waste heat boiler, and the first waste heat boiler is connected with the first generating set.The dry high temperature coke put out in stove of cold nitrogen cooling that oxyen manutactory produces, the high temperature nitrogen of generation enters waste heat boiler and carries out heat recovery and utilization, drives power generation, make use of further dryly to put out the waste heat produced in stove, prevents the waste of this part of waste heat.
Preferably, described raw material sintering system comprises the process furnace, the second waste heat boiler and the second generating set that connect successively, and described process furnace is connected with described blast furnace.Raw material sintering system is connected with blast furnace, is carried out sintering block into by breeze, improves utilization ratio and the efficiency of breeze; On the other hand, be provided with the second waste heat boiler and the second generating set in sintering system, the waste heat in the process furnace of sintering has been carried out efficient recovery, prevent the waste of the waste heat of this part, can also generate electricity for industrial production or daily life, effectively save resource.
Preferably, described power generation system comprises the coal press machine, external combustion engine and the 4th generating set that connect successively, and described coal press machine is connected with described carbide furnace and blast furnace respectively.Because the carbide furnace of coking system and blast furnace can produce a large amount of coke-oven gas and blast furnace gas in operational process, if will polluted air greatly by the discharge of these coal gas, if utilized, can ensure environmental protection basis on efficent use of resources, prevent the waste of resource.
Further preferred, described power generation system also comprises interconnective 3rd waste heat boiler and the 3rd generating set, and the 3rd waste heat boiler is connected with described external combustion engine, is used for the waste heat of recovery external combustion engine generation.The existence of the 3rd waste heat boiler and the 3rd generating set can reclaim the waste heat of the burning generation of external combustion engine, and the utilising efficiency of residual heat resources is improved further.
Preferably, described first generating set, the second generating set and the 3rd generating set are steam turbine.Steam turbine is the rotary power machinery energy transformation of steam being become mechanical work, and by waste heat boiler recovery waste heat, steamer function utilizes the waste heat of recovery to generate electricity better.
Preferably, described first generating set, the second generating set, the 3rd generating set and the 4th generating set are all connected with heating system.The residual heat resources utilized through steam turbine belong to low-heat residual heat resources, are used to heating, can utilize resource better, avoid the waste of the local energy.
Beneficial effect of the present invention is:
(1) the coking of coal system in the present invention, raw material sintering system, smelting iron and steel system and power generation system collaborative work, ensure that the effective and reasonable utilization of resource.
(2) waste heat boiler in the present invention and power generation assembly can realize remaining pick up the heat, have effectively saved resource, more effectively alleviate the pollution because heating, generating etc. produce because consuming coal, environmental protection.
(3) dryly put out the cold nitrogen that stove employs from oxyen manutactory high temperature coke is lowered the temperature, effectively saved the energy, more decreased the waste of resource.
(4) be also connected with heating system after generating set, can, by improving the exhaust temperature of generating set, make heating system effectively utilize this part low temperature exhaust heat, reducing the loss of energy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is concrete structural representation of the present invention.
Wherein, 1, coking of coal system, 2, smelting iron and steel system, 3, raw material sintering system, 4, power generation system, 5, heating system.
Embodiment
As shown in Figure 1, a kind of steelmaking system, comprise coking of coal system 1, raw material sintering system 3, smelting iron and steel system 2 and power generation system 4, wherein, coking of coal system 1 is all connected with smelting iron and steel system 2 with raw material sintering system 3, described power generation system 4 is connected with coking of coal system 1 and smelting iron and steel system 2 respectively, the coke-oven gas that power generation system 4 utilizes coking of coal system 1 to produce and the Power Generation by BF Gas that smelting iron and steel system 2 produces.
As shown in Figure 2, smelting iron and steel system 2, be and carry out the system of making steel at steelworks, the principle of steel-making is exactly under the high temperature conditions, with the oxide compound of oxygen or iron, excessive carbon contained in the pig iron and other impurity is transferred to gas or slag and removes.Smelting iron and steel system comprises interconnective blast furnace and converter, and blast furnace is connected with described raw material sintering system, and the steel refined in converter transports Steel Mill to and processes.Smelting iron and steel system also comprises Solid state fermentation system, and Solid state fermentation device is connected with heating system and blast furnace respectively.The high temperature washing slag water that high temperature Solid state fermentation device produces is used for heating.Solid state fermentation device is dreg flushing tank, and the high velocity flow chilling that high temperature waste residue is provided by slag flushing pump in dreg flushing tank is washed into grain slag and is granulated, for the use of producing cement.The washing slag water of the high temperature produced is used for heating, will realize energy-conservation object, and this technique instead of steam and interchanger heating, can reduce the input of coal firing boiler, avoids the pollution to environment in heating boiler production process.
Described coking of coal system 1, be coke-oven plant carries out coking system to coal, coking of coal take coal as raw material, under isolated air conditions, be heated to about 950 DEG C, produce coke through high temperature carbonization, obtain coal gas, coal tar reclaim a kind of coal conversion process of other Chemicals simultaneously, the coke of generation is used for ironmaking.Coking of coal system comprises the process furnace, the carbide furnace that connect successively and dryly puts out stove, and the dry stove that puts out is connected with described blast furnace.
Dry stove first waste heat boiler that puts out connects, and the first waste heat boiler is connected with the first generating set.The dry high temperature coke put out in stove of cold nitrogen cooling that oxyen manutactory produces, the high temperature nitrogen of generation enters waste heat boiler and carries out heat recovery and utilization, drives power generation.The dry principle of work putting out stove utilizes cold rare gas element to put out in stove the red burnt heat exchange with red heat dry thus cool red Jiao.Heat is passed to dry waste heat boiler generation steam by the rare gas element absorbing red burnt heat, and cooled rare gas element blasts the dry stove that puts out by recirculation blower again and cools red Jiao, the steam driven steam turbine power generation in waste heat boiler.
Described raw material sintering system 3, is and sinters raw material (iron ore) at sintering plant, by various powdery iron-containing raw material, allocates suitable fuel and flux into, Homogeneous phase mixing, is then placed on igniting sintering on agglomerating plant.Under the effect that fuel produces high heat and series of physical chemical transformation, there is softening and fusing in partial blend particle surface, produces the liquid phase of some amount, and other unfused ore particles wetting, when after cooling, mineral powder granular is bonded to block by liquid phase.This process is called sintering, and the nugget of gained is in agglomerate, and just can add in blast furnace after breeze agglomeration and use.Raw material sintering system comprises the process furnace, the second waste heat boiler and the second generating set that connect successively, and described process furnace is connected with described blast furnace.
Described power generation system 4 comprises the coal press machine, external combustion engine and the 4th generating set that connect successively, and described coal press machine is connected with coke-oven gas collection device and blast furnace gas collection device respectively.
Described power generation system 4 also comprises interconnective 3rd waste heat boiler and the 3rd generating set, and the 3rd waste heat boiler is connected with described external combustion engine, be used for reclaim external combustion engine produce waste heat.
Described first generating set, the second generating set and the 3rd generating set are steam turbine.Steam turbine is the rotary power machinery energy transformation of steam being become mechanical work, also known as steam turbine, primover of generating can be used as, also can the various pump of Direct driver, blower fan, compressor and propeller for vessels etc., the steam discharge of steam turbine or intermediate extraction can also be utilized to meet and to produce and heat supply needs in life.
First generating set, the second generating set, the 3rd generating set and the 4th generating set are all connected with heating system 5.The waste heat that heating system 5 can effectively utilize generating set to produce heats, and effectively prevent the waste of the local energy.
Waste heat boiler, refer to that the heat produced after utilizing the waste heat in the waste gas in various commercial run, waste material or waste liquid and combustiblesubstance burning thereof is heated to water in the boiler of certain working medium, the waste heat boiler of generation can produce hot water by waste heat recovery or steam supplies steam turbine power generation.
Working process of the present invention is:
Untreated coal preheats in process furnace, and the heat in the coke oven flue gas of generation is reclaimed by waste heat boiler, and passes through steam turbine power generation; Pre-warmed coal enters coking in carbide furnace, obtain high temperature coke, high temperature coke enters and dryly puts out in stove, normal temperature coke and high temperature nitrogen is obtained by the cold nitrogen cooling from oxyen manutactory, nitrogen at room is smelted in blast furnace with the iron ore grog from raw material sintering system, and obtain molten iron, waste residue and blast furnace gas, molten iron enters in converter and makes steel, waste residue obtains washing slag water through the process of Solid state fermentation device, and utilizes washing slag water to heat; Coke-oven gas and blast furnace gas burn in external combustion engine through coal compression machine, generating; The waste heat that external combustion engine produces is reclaimed by waste heat boiler, passes through steam turbine power generation.Heat in the sinter fume of the process furnace generation of raw material sintering system 3 is reclaimed by waste heat boiler, and through steam turbine power generation.The low temperature exhaust heat produced in above steam turbine power generation process is reclaimed by heating system 5, utilizes further.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. a steelmaking system, it is characterized in that: comprise coking of coal system, raw material sintering system, smelting iron and steel system and power generation system, wherein, coking of coal system is all connected with smelting iron and steel system with raw material sintering system, described power generation system is connected with coking of coal system and smelting iron and steel system respectively, the coke-oven gas that power generation system utilizes coking of coal system to produce and the Power Generation by BF Gas that smelting iron and steel system produces.
2. steelmaking system according to claim 1, is characterized in that: described smelting iron and steel system comprises interconnective blast furnace and converter, and blast furnace is connected with described raw material sintering system.
3. steelmaking system according to claim 2, is characterized in that: described smelting iron and steel system also comprises Solid state fermentation device, and described Solid state fermentation device is connected with heating system and blast furnace respectively.
4. steelmaking system according to claim 3, it is characterized in that: described coking of coal system comprises the process furnace, the carbide furnace that connect successively and dryly puts out stove, the dry stove that puts out is connected with described blast furnace and the first waste heat boiler respectively, and the first waste heat boiler is connected with the first generating set.
5. steelmaking system according to claim 4, is characterized in that: described raw material sintering system comprises the process furnace, the second waste heat boiler and the second generating set that connect successively, and described process furnace is connected with described blast furnace.
6. steelmaking system according to claim 5, is characterized in that: described power generation system comprises the coal press machine, external combustion engine and the 4th generating set that connect successively, and described coal press machine is connected with coke-oven gas collection device and blast furnace gas collection device respectively.
7. steelmaking system according to claim 6, is characterized in that: described power generation system also comprises interconnective 3rd waste heat boiler and the 3rd generating set, and the 3rd waste heat boiler is connected with described external combustion engine.
8. steelmaking system according to claim 7, is characterized in that: described first generating set, the second generating set, the 3rd generating set and the 4th generating set are all connected with heating system.
9. steelmaking system according to claim 8, is characterized in that: described first generating set, the second generating set and the 3rd generating set are steam turbine.
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| CN201510435982.1A CN105112606B (en) | 2015-07-22 | 2015-07-22 | A kind of steelmaking system |
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| CN201510435982.1A CN105112606B (en) | 2015-07-22 | 2015-07-22 | A kind of steelmaking system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106352711A (en) * | 2016-10-27 | 2017-01-25 | 武汉钢铁股份有限公司 | Residual heat and residual energy comprehensive utilization system of coking procedure |
| CN111621612A (en) * | 2020-06-23 | 2020-09-04 | 沈阳东大山汇环境科技有限公司 | Converter tail gas waste heat dry distillation coal cracking gas preheating steelmaking system and steelmaking method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110836028B (en) * | 2019-11-22 | 2021-06-01 | 上海宝冶集团有限公司 | Double-high-span steel-making tower installation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352711A (en) * | 2016-10-27 | 2017-01-25 | 武汉钢铁股份有限公司 | Residual heat and residual energy comprehensive utilization system of coking procedure |
| CN106352711B (en) * | 2016-10-27 | 2018-08-17 | 武汉钢铁有限公司 | Coking process residual heat and energy utilization system |
| CN111621612A (en) * | 2020-06-23 | 2020-09-04 | 沈阳东大山汇环境科技有限公司 | Converter tail gas waste heat dry distillation coal cracking gas preheating steelmaking system and steelmaking method |
| CN111621612B (en) * | 2020-06-23 | 2024-03-19 | 沈阳东大山汇环境科技有限公司 | Converter tail gas waste heat carbonization coal pyrolysis coal gas preheating steelmaking system and steelmaking method |
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