CN108534128A - A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling - Google Patents
A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling Download PDFInfo
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- CN108534128A CN108534128A CN201810373905.1A CN201810373905A CN108534128A CN 108534128 A CN108534128 A CN 108534128A CN 201810373905 A CN201810373905 A CN 201810373905A CN 108534128 A CN108534128 A CN 108534128A
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- Prior art keywords
- steam
- steel
- recycling
- supply
- making
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/183—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines in combination with metallurgical converter installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
Abstract
The present invention relates to the parameter regulation means of two kinds of vapour systems of a kind of supply of iron and steel enterprise and recycling, belong to steel-making vapour system parameter adjustment technical field.Technical solution is：The direct-furnish RH stoves after coal gas superheater；In the Converter Steam pipe network system of supply RH, installation coal gas superheater heats Converter Steam, Converter Steam is set quickly to heat, become the dry saturated steam of 20~40 DEG C of overheat, it is used for RH stove vacuum pumps, meet RH and vacuumize requirement, solves steel-making afterheat steam recycling flow suddenly change and impact is generated to steam pipe network.Advantageous effect of the present invention：When making steel steam parameter dosage and yield has larger fluctuation, the stabilization for ensureing steel-making steam supply and recycling is remained able to, while increasing amount of steam withdrawn, improve the efficiency of comprehensive utilization of energy.
Description
Technical field
The present invention relates to the parameter regulation means of two kinds of vapour systems of a kind of supply of iron and steel enterprise and recycling, belong to steel-making and steam
Vapour systematic parameter adjustment technology field.
Technical background
In iron and steel enterprise, furnace system needs the steam of two kinds of parameters, is wanted to the stability of steam pressure and temperature
Ask very high；It is a kind of to require steam parameter for 1.3-1.5MPa, between 210-240 DEG C, RH refining furnaces are used for, RH vacuum refining furnaces to make
With with to generate steam be intermittent nature, smelting cycle 38min, RH refining furnaces use and generate steam when STEELMAKING PRODUCTION, therefore
Cause supply RH vapour systems pressure oscillation it is very big, can not ensure the stabilization of pressure, be difficult to realize afterheat steam supply and
Recycling.Another kind requires steam parameter for 0.88-1.0MPa, between 210-240 DEG C, is used for converter devaporizer dedusting, and
The afterheat steam of steelmaking converter " Vaporizing cooling " recycling will be incorporated to external steam pipe network or the steaming for steam turbine power generation requirements pipe network
Steam pressure is stablized relatively, can just be conducive to the recycling of afterheat steam.And in iron and steel enterprise, with the hair of cycle energy-saving technology
Exhibition, the recycling of steam and efficiently uses as energy-saving trend.How supply RH refining furnace and vapour system pressure are solved
Temperature is stablized, and ensures that waste heat fully recycles and make steel the stabilization of steady production as the task and problem of each enterprise.Steel
The main steam source of supply of enterprise's steam pipe network, be respectively power plant for self-supply, steel-making Steam Recovery, hot rolling Steam Recovery, more than sintering
Heat power generation.Steam user mainly has：Steel-making, ironmaking, hot rolling, coking, public auxiliary system etc..
Invention content
Present invention aims at a kind of iron and steel enterprise's supply of offer and the parameter regulation means of two kinds of vapour systems of recycling, lead to
It crosses and the mode of RH steel-making steam methods of supplying and afterheat steam recycling is improved, improve the stability of vapour source point device and fit
Ying Xing is finally reached when making steel steam parameter dosage and yield has larger fluctuation, remains able to ensure steel-making steam supply
With the stabilization of recycling, while increasing amount of steam withdrawn, improve the efficiency of comprehensive utilization of energy, solves prior art steelmaking system two
Plant the supply for the steam that parameter discontinuity uses and the problem that yield is unstable.
The technical scheme is that：
The parameter regulation means of two kinds of vapour systems of a kind of supply of iron and steel enterprise and recycling, the recycling of steelmaking converter steam
Journey：The direct-furnish RH stoves after coal gas superheater；In the Converter Steam pipe network system of supply RH, coal gas superheater is installed
Converter Steam is heated, Converter Steam is made quickly to heat, becomes the dry saturated steam of 20~40 DEG C of overheat, for RH stove vacuum
Pump uses, and meets RH and vacuumizes requirement, solves steel-making afterheat steam recycling flow suddenly change and generates punching to steam pipe network
It hits.
The steam pressure that steel mill waste heat recovery generates is 1.3-1.6 MPa, and the pressure of external steam pipe network is
0.98MPa can make if being incorporated to the regulative mode that pipeline network regulation downstream pressure controls grid-connected quantity of steam using according to steel-making steam
It is significantly increased suddenly during bessemerizing at the grid-connected quantity of steam of steel-making（40 ~ 60 t/h of maximum increase）, cause steam pipe network
The grid-connected vapour pressure of other vapour source points increases, to cause entire steam pipe network pressure fluctuation.Consider that steel-making recovered steam is turning
Stove blows changes feature greatly with pressure flow during blow off, changes the control model of grid-connected steam control valve, by downstream pressure
Adjusting is changed to flow-rate adjustment after valve.On the basis of putting into coal gas superheater, flow after the setting steel-making grid-connected regulating valve of steam
The upper limit（Such as 40t/h）, the impact to external neat pipe network, regulating valve and storage are incorporated to by the unlatching control recovered steam of regulating valve
Hot device mutual cooperation extends the steam grid-connected time, stabilizes the pressure of external steam pipe network.
Power plant for self-supply's steam turbine operation process of the present invention：It improves steam turbine surge tank vacuum, improve steam turbine surge tank pressure
Power improves steam turbine surge tank temperature.Since steam turbine is partition board structure, i.e. movable vane piece is inlaid in the outer rim of wheel disc, is sprayed
Nozzle is on partition board, on the outer rim insertion cylinder inner wall of partition board in corresponding conduit.Such structure causes the high temperature in steam turbine
Steam is only flowed about in steam turbine close to the inner wall of cylinder, the heating of the variation of steam turbine steam inside flow to cylinder（Or
It is cooling）Effect compares the heating of rotor（Or it is cooling）Effect performance becomes apparent from.When extraction flow of steam largely changes, steam extraction
Mouthful later each grade blade by steam flow can significantly reduce, the insulating layer outside cylinder can effectively organize the cold of cylinder
But, turbine rotor is then cooled down by the conduction of heat of wheel disc, and steam turbine is caused owning consumption occur, when owning consumption is super
It trips when crossing -2.5mm.The mechanism of design feature and owning consumption stroke for steam turbine introduces surge tank by initial steam, will
Axle envelope stripping temperature is sent to be increased to 265 DEG C by 180 DEG C, reduce main steam temperature to 532 DEG C, raising axle envelope steam pressure by 0.04MPa
Be increased to 0.08MPa, unit vacuum degree is increased to -86KPa by -77KPa, efficiently controlled the swollen difference of unit, improved vapour
Turbine to steel-making steam supply ability and unit stability and to steam extraction amount change adaptability.
Power plant for self-supply's double-extract steam turbine rotating barrier steam extraction substitutes reducing-and-cooling plant and produces steam pipe network to outer low pressure
Carry out steam supply；According to the demand of steel-making, the pressure of steam extraction is respectively set as 0.98MPa and 2.1MPa, steam turbine 505E is electro-hydraulic
After the steam pipe network pressure signal detected is calculated judgement by regulating system, PID electric signals are exported, are converted the electrical signal to simultaneously
The hydraulic pressure signal of medium pressure servo-motor by control rotating barrier, adjust steam outer net pressure, due to extracted steam from turbine can and
When tracking, adjust, greatly reduce the pressure wave momentum of steam outer net, stabilize the pressure of entire outer net.Two sets of RH refining furnaces
Based on Converter Steam, the operational mode supplemented by thermoelectricity steam；Converter Steam grid-connected closing when RH is produced, the steam of generation
RH storage heaters are supplied, pressure is in 1.5-1.8 MPa at this time, while steam power plant being required to send vapour, ensures that outer net thermoelectricity steam pressure is big
In 1.5 MPa；Since system is designed with check-valves, therefore RH mainly uses Converter Steam when pneumatic steelmaking, when converter is not made steel
And steam heat release causes stress when dropping to 1.3MPa in storage heater, RH uses external steam automatically.By two vapour of power plant for self-supply
Simultaneously vapour externally carries out steam supply jointly for turbine steam extraction, to reduce because outer net steam user's steam consumption increases suddenly, causes steamer
The mutation of machine steam extraction amount impacts the safe and stable operation of steam turbine, and it is swollen to Turbo-generator Set to alleviate steam extraction amount acute variation
The influence of difference and vibration.Machine stove is run using piping-main scheme, and the control system configuration of steam turbine is identical so that steam turbine rotates
The control of partition board and extraction pressure are consistent with each other, and when steel-making usage amount increases suddenly, two turbine steam extraction systems are adjusted simultaneously
It is whole, stabilize steam parameter on the basis of improving steam supportability.
Advantageous effect of the present invention：It is improved by way of making steel steam method of supplying and afterheat steam recycling to RH,
The Stability and adaptability for improving vapour source point device, be finally reached has larger fluctuation in steel-making steam parameter dosage and yield
When, the stabilization for ensureing steel-making steam supply and recycling is remained able to, while increasing amount of steam withdrawn, improves comprehensive utilization of energy
Efficiency.
Description of the drawings
Fig. 1 is that one RH of the embodiment of the present invention makes steel steam pipe network schematic diagram；
Fig. 2 is that two RH of the embodiment of the present invention makes steel steam pipe network schematic diagram；
Fig. 3 is one prior art ductwork pressure curve graph of the embodiment of the present invention；
Fig. 4 is two prior art ductwork pressure curve graph of the embodiment of the present invention；
Fig. 5 is one ductwork pressure curve graph of the embodiment of the present invention；
Fig. 6 is two ductwork pressure curve graph of the embodiment of the present invention.
Specific implementation mode：
The invention will be further described below in conjunction with the accompanying drawings.
In embodiment, three extracted steam from turbine of prior art power plant for self-supply supply the steam of two kinds of parameters：The first pressure
260 DEG C of power 0.95MPa, temperature；290 DEG C of second of pressure 2.1MPa, temperature；Sintering waste heat generating supplies a kind of steam of parameter
260 DEG C of pressure 1.2MPa, temperature；A kind of steam pressure 0.5MPa of parameter, temperature 220 are supplied in dry coke quenching electric turbine steam extraction
℃；The steelmaking converter of embodiment one（One steelmaking converter）With the steelmaking converter of embodiment two（Handan treasured converter）Self-produced steam, supply
A kind of steam pressure 1.3MPa of parameter, 260 DEG C of temperature.Above four kinds of vapour sources pass through 2.1 MPa, 1.0MPa and 0.5MPa tri-
Production and the life steam such as kind steam pipe network supply ironmaking, steel-making, steel rolling.The characteristics of wherein making steel due to production technology, makes
Extremely unstable at the dosage of steam, for converter devaporizer using steam parameter 0.88-1.0MPa, 210-240 DEG C is maximum
40t/h, minimum 10t/h, and variation is extremely frequent, and it is intermittent nature that in addition RH vacuum refining furnaces, which use and generate steam,
Smelting cycle 38min, RH refining furnaces are using steam 1.3-1.5MPa when STEELMAKING PRODUCTION, 210-240 DEG C, 32 t/h of maximum stream flow,
Minimum 0t/h, therefore cause the pressure oscillation of two kinds of vapour systems very big, it can not ensure the stabilization of pressure, be difficult to realize waste heat and steam
The supply and recycling of vapour.Before invention project carries out public relations, the steam that low pressure produces steam pipe network is supplied mainly by providing electricity for oneself
High temperature and high pressure steam pressure and temperature reducing to 0.98MPa and 2.1MPa are carried out feed by factory's reducing-and-cooling plant, and such mode is causing
While energy significant wastage, since reducing-and-cooling plant is to pressure controlled hysteresis so that the pressure of steam pipe network is substantially
Degree fluctuation, referring to Fig. 3, Fig. 4.Steel-making simultaneously and the recycling of hot rolling steam take level pressure force control mode, above-mentioned afterheat steam to return
Receipts amount certainly will cause external steam ductwork pressure to fluctuate suddenly, subtract when changing suddenly or STEELMAKING PRODUCTION steam is unexpected
Warm decompressor cannot accurately carry out the adjusting of steam pressure in time again, more exacerbate the fluctuation of steam pipe network pressure.It makes
At the frequent take-off of reducing-and-cooling plant outlet side safety valve, the pipe of reducing-and-cooling plant outlet side valve and external steam pipe network
Repeatedly there is the leakage of valve flanges pad, steam pipe network pipeline-weld is broken for a long time under the effect of the steam pressure of significantly alternation in road
It the serious accidents such as splits, serious influence is caused on the production of steel-making.
Implement the embodiment of the present invention one（One steelmaking converter）；With reference to attached drawing 1, three sets of 120T/H converters of steel-making and a set of
120T/H refines RH stoves, and using the steam of two kinds of parameters, a kind of steam parameter is 0.88-1.0MPa, and 210-240 DEG C is used for converter
Devaporizer dedusting；Another steam parameter is 1.3-1.5MPa, and 210-240 DEG C for refining RH stove evacuations.One steel-making
The saturation afterheat steam that three sets of 120T/H converter gasification burners generate enters six sets of storage heater tank 192m3, after overheat pressure regulation processing
Preferential to meet steel mill RH stoves production needs, rich some vapor can be supplied for steam vapour system and make steel three sets of 120T/H turns
Stove devaporizer dedusting uses.Power plant 2.1MPa sends vapour system outside as security personnel's vapour source, when converter gasification burner producing steam
As supplement vapour source when insufficient, steam pressure and temperature parameter are adjusted.
Implement the embodiment of the present invention two（Handan treasured converter）；With reference to attached drawing 2, Handan treasured makes steel two sets of 260T/H converters and a set of
260T/H refines RH stoves, and using the steam of two kinds of parameters, a kind of steam parameter is 0.88-1.0MPa, and 210-240 DEG C is used for converter
Devaporizer dedusting；Another steam parameter is 1.3-1.5MPa, and 210-240 DEG C for refining RH stove evacuations.Handan treasured refining
The saturation afterheat steam that two sets of 260T/H converter gasification burners of steel generate enters six sets of storage heater tank 192m3, through overheating pressure regulation processing
Preferentially meet steel mill RH stoves production needs afterwards, rich some vapor can supply steel-making 2 sets of 260T/H for steam vapour system
Converter devaporizer dedusting uses.Power plant 1.0MPa send outside vapour system as supplement vapour source be sent into storage heater tank, when turn
As supplement vapour source when stove gasification burner producing steam deficiency, steam pressure and temperature parameter are adjusted.Power plant 2.1MPa sends steam system outside
System is produced and used as security personnel's vapour source, directly supply steel-making RH stoves.
The embodiment of the present invention allows extracted steam from turbine to substitute pressure and temperature reducing dress by using the pressure of adjustment extracted steam from turbine
Set and send vapour to external steam pipe network, form " power plant's constant-pressure send outside and waste heat constant flow recycling ", " based on Converter Steam, heat
Supplemented by electric steam " etc. a whole set of " method of adjustment of supply and recycling two kinds of parameters steel-making vapour system parameter stability ", ensure big
Type iron and steel enterprise steel-making steam parameter stablizes adjustment, smoothly realizes afterheat steam recycling and iron and steel enterprise produces steam pipe
The pressure stability of net is supplied and recycling.After implementing the present invention, one pipe network system pressure parameter fluctuation curve of embodiment is shown in Fig. 5, real
It applies two pipe network system pressure parameter fluctuation curve of example and sees Fig. 6.
Claims (3)
1. the parameter regulation means of a kind of iron and steel enterprise's supply and two kinds of vapour systems of recycling, it is characterised in that steelmaking converter steam
Removal process：The direct-furnish RH stoves after coal gas superheater；In the Converter Steam pipe network system of supply RH, coal gas is installed
Superheater heats Converter Steam, and Converter Steam is made quickly to heat, and becomes the dry saturated steam of 20~40 DEG C of overheat, for RH
Stove vacuum pump uses, and meets RH and vacuumizes requirement, solves steel-making afterheat steam and recycles flow suddenly change to steam pipe network
Generate impact.
2. the parameter regulation means of a kind of iron and steel enterprise's supply according to claim 1 and two kinds of vapour systems of recycling,
It is characterized in that：On the basis of putting into coal gas superheater, flow rate upper limit after the setting steel-making grid-connected regulating valve of steam passes through adjusting
The unlatching control recovered steam of valve is incorporated to the impact to external neat pipe network, and regulating valve and storage heater mutual cooperation extend steam
The grid-connected time stabilizes the pressure of external steam pipe network.
3. the parameter regulation means of a kind of iron and steel enterprise's supply according to claim 1 and two kinds of vapour systems of recycling,
It is characterized in that power plant for self-supply's steam turbine operation process：Axle envelope stripping temperature will be sent to be increased to 265 DEG C by 180 DEG C, reduce main steam temperature
Spend to 532 DEG C, improve axle envelope steam pressure by 0.04MPa be increased to 0.08MPa, unit vacuum degree be increased to by -77KPa -
86KPa。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810373905.1A CN108534128A (en) | 2018-04-24 | 2018-04-24 | A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling |
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| CN201810373905.1A CN108534128A (en) | 2018-04-24 | 2018-04-24 | A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling |
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| CN108534128A true CN108534128A (en) | 2018-09-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260019A (en) * | 2019-04-03 | 2019-09-20 | 宁波钢铁有限公司 | The control method of outer net steam control valve is sent when a kind of steel-making RH production |
| CN110442175A (en) * | 2019-09-05 | 2019-11-12 | 攀钢集团攀枝花钢钒有限公司 | Vacuum pressure and temperature reducing station automatic control system |
| CN111607687A (en) * | 2020-04-30 | 2020-09-01 | 邯郸钢铁集团有限责任公司 | Energy-saving device and method for improving steam quality of steelmaking RH refining furnace |
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| CN105200184A (en) * | 2015-09-25 | 2015-12-30 | 中国科学院力学研究所 | System for dragging converter flue gas induced draft fan by aid of converter steam |
| CN107338344A (en) * | 2017-06-28 | 2017-11-10 | 秦皇岛首秦金属材料有限公司 | A kind of method for meeting the production of RH stoves with converter waste heat steam completely |
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| CN101806395A (en) * | 2010-02-24 | 2010-08-18 | 邯钢集团邯宝钢铁有限公司 | Regulating method of pressure stabilization of public steam pipe network for low-pressure production of iron and steel enterprises |
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