CN107574273A - Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating - Google Patents
Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating Download PDFInfo
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- CN107574273A CN107574273A CN201710756425.9A CN201710756425A CN107574273A CN 107574273 A CN107574273 A CN 107574273A CN 201710756425 A CN201710756425 A CN 201710756425A CN 107574273 A CN107574273 A CN 107574273A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
Abstract
The invention discloses a kind of blast-furnace hot-air system temperature based on plasma heating to regulate and control method and apparatus, and the equipment includes metal smelt blast furnace and the high temperature hot-blast furnace supporting with it；It is connected between the blast furnace gas outlet of metal smelt blast furnace and the fuel gas inlet of high temperature hot-blast furnace by blast furnace gas supervisor, is connected between the high temperature air outlet of high temperature hot-blast furnace and the hot blast input endless tube of metal smelt blast furnace by hot blast conveying supervisor；It also includes at least adjusting the other pipe of gas heating and the plasma heater supporting with it all the way；The output end of the other pipe of regulation gas heating conveys supervisor's middle and lower reaches pipeline section with hot blast and is connected.This method introduces regulation gas from the input of the other pipe of regulation gas heating, is sent in the middle and lower reaches pipeline section of hot blast conveying supervisor；Exchange solar term on demand by plasma heater in the process and carry out quick heat temperature raising, to reduce the fluctuating range into stove hot blast temperature with the time.
Description
Technical field
The present invention relates to blast-furnace hot-air Oil Temperature Controlling Technigue field, more particularly to a kind of blast furnace based on plasma heating
Hot-air system temperature adjusting method and equipment.
Background technology
In blast furnace iron-making process, energy-saving maximally effective approach be exactly improve blast furnace enter stove wind-warm syndrome.Heat
Wind furnace is to improve the major process unit into stove wind-warm syndrome, and existing hot-blast stove utilizes regenerative heat-exchange mode, passes through blast furnace gas
Or high heating value fuel gas buring and air-supply alternation are continuously to supply blast furnace high temperature air.Basic demand of the blast furnace to hot-blast stove be
Stable high warm air is provided, but every hot-blast stove has burning accumulation of heat and the process blown to blast furnace, in order that blast furnace obtains
Stable, continuous hot blast, conventional design layout are to be equipped with three to four hot-blast stove alternate runs per seat height stove, then can maintain substantially
High hot blast floats within the scope of certain temperature.
When blast funnace hot blast stove change stove operation, hot blast temperature has a certain degree of fluctuation, the control of undulating value size
System is mainly adjusted by the valve opening of cold blast sliding valve, because valve opening size is influenceed by factors such as equipment itself precision
Larger, the cold wind pressure oscillation that input is easily caused during stove is changed is larger.One disclosed in Chinese patent CN206014993U
Kind blast-furnace hot-air furnace apparatus cold wind intelligent regulating system, and a kind of blast funnace hot blast stove disclosed in Chinese patent CN205874470U
Optimal Control System, all it is to utilize Automatic Control Theory, cold air adjusting valve is controlled using PLC, compared to manual regulation
It is more intelligent, become more meticulous, during stove is changed, the system constantly gathers the variable quantity of cold wind pressure and flow, passes through program
Write, the fluctuation of cold wind temperature and pressure when can effectively reduce changing-over stove.
However, although the above-mentioned this regulative mode mixed using cold wind and hot blast can maintain hot blast temperature constant, add
Entering cold wind can cause the hot blast temperature in warm-air pipe to reduce, and the wind pushing temperature due to entering blast furnace in production is higher, more stable meeting
So that the effect of blast furnace process metal is better, therefore this mode for adding cold wind have lost calorific value, cause energy waste.
The content of the invention
It is an object of the invention to provide it is a kind of based on plasma heating blast-furnace hot-air system temperature regulation and control method with
Equipment, be capable of Effective Regulation metal smelt blast furnace enters the fluctuation of stove hot blast temperature.
To achieve the above object, the blast-furnace hot-air system temperature regulation and control side provided by the present invention based on plasma heating
Method, the blast-furnace hot-air system include the hot blast conveying master of metal smelt blast furnace, high temperature hot-blast furnace and connection between
Pipe；This method is that the middle and lower reaches pipeline section introducing that supervisor is conveyed in hot blast is at least managed and for exchanging by the heating of regulation gas all the way
The regulation gas of the other pipe conveying of solar term heating carries out the plasma heater of quick heat temperature raising, and comprises the following steps：
1) regulation gas is introduced from the input of the other pipe of regulation gas heating, and is drawn from the output end of the other pipe of regulation gas heating,
It is sent in the middle and lower reaches pipeline section of hot blast conveying supervisor, makes it with temperature in hot blast conveying supervisor with the larger upstream heat of time fluctuation
Wind mixes；
2) plasma heater exchanges solar term and carries out quick heat temperature raising on demand, passes through dynamic control plasma heater
The flow of regulation gas in heating power and/or the other pipe of dynamic control regulation gas heating, reduce metal smelt blast furnace enters stove hot blast
Temperature with the time fluctuating range.
Alternatively, the heating power of the plasma heater can be controlled as follows：For temperature fluctuation compared with
Big upstream hot blast (hot blast conveys the hot blast in being responsible for before referring to mixing), when it is in lower temperature, adjusts heating plasma
Device is in larger power, and temperature is lower, and heating power is bigger, until Ion Heating device reaches peak power；When its be in compared with
During high-temperature, adjustment plasma heater is in less power, and temperature is higher, and heating power is smaller；When upstream hot blast temperature
During more than goal of regulation and control temperature line, the power for adjusting plasma heater is zero, i.e., does not heat.
Alternatively, the gas composition of the regulation gas can use upstream hot blast, outside air, steam, pure oxygen etc. or wherein
Two kinds and the mixed gas of above gas.
Preferably, the regulation gas uses outside air, and outside air first passes around pressurized treatments, to overcome SR
And adapt to follow-up system pressure demand；Then 200~800 DEG C are preheated to, then quick heating is carried out by plasma heater and risen
Temperature.In cold stage, traditional mode of heating, such as waste heat heat exchange, blast furnace gas combustion mode have more preferable economy；And
In hot stage, heating plasma implement body has the more preferable efficiency of heating surface, using the teaching of the invention it is possible to provide higher temperature.Mixed in the use of routine
Part cold wind is mixed to drag down the bulk temperature into the hot blast of metal smelt blast furnace to reach in the constant control mode of temperature, is adjusted
Throttle body preheats no practical significance.And the present invention is improved into metal smelt height using the regulation gas of blending heating plasma
The bulk temperature of the hot blast of stove will reduce plasma torch to reach the constant control mode of temperature, thus adjust gas preheating
Power consumption, it is more notable with reference to the utilization of waste heat, economic benefit.
Preferably, the regulation gas uses the upstream hot blast for the branch line extraction that supervisor's upstream pipeline section is conveyed from hot blast,
It directly carries out quick heat temperature raising by plasma heater.
Preferably, the mass flow of the regulation gas is 5~30% of upstream hot blast mass flow in hot blast conveying supervisor.
Using bypass input adjust gas by the way of regulate and control hot blast temperature, on the one hand improve hot blast temperature control accuracy and in real time
Property；On the other hand the power consumption of plasma heater is reduced.
Preferably, the dynamic control uses fuzzy mathematics Collaborative Control technology, to enter the hot blast of metal smelt blast furnace
Temperature is constant to be used as the first control targe, minimum as the second control targe using plasma heater consumption power, to enter gold
The hot blast temperature lifting degree maximum for belonging to steelmaking furnace is used as the 3rd control targe；Preferentially reach the first control mesh during dynamic control
Mark, next reaches the second control targe, finally reaches into the 3rd control targe.
Preferably, following mathematical relationship is met between the main control parameters of the fuzzy mathematics Collaborative Control technology：
In formula：F is functional symbol；P is the general power of plasma heater；T1、Q1For the temperature of plasma working gas
And flow；T2、Q2For the high temperature air outlet temperature and flow of high temperature hot-blast furnace；T3、Q3Adjusted for the high temperature after plasma heating
Throttle temperature and flow；T4、Q4For metal smelt blast furnace entrance high-temperature hot-air temperature and flow；C0For hot blast specific heat；Each thing in formula
The unit of reason amount uses the SI system of units, temperature K, flow kg/s, power W, specific heat Jkg-1·K-1。
Invention also provides a kind of blast-furnace hot-air system temperature adjusting device based on plasma heating, including gold
Belong to steelmaking furnace and the high temperature hot-blast furnace supporting with it；The upper and lower part of the metal smelt blast furnace is respectively arranged with blast furnace coal
Gas exports and hot blast input endless tube；Fuel gas inlet and offgas outlet are provided with the heating passage of the high temperature hot-blast furnace, it is described
Normal temperature air entrance and high temperature air outlet are provided with the heat recipient passage of high temperature hot-blast furnace；Blast furnace gas outlet with it is described
It is responsible for and is connected by blast furnace gas between fuel gas inlet, passes through heat between the high temperature air outlet and hot blast input endless tube
Wind conveying supervisor is connected；It also includes at least adjusting the other pipe of gas heating and the plasma heater supporting with it all the way；The tune
The branch line phase that the input of the other pipe of solar term heating is connected with extraneous source of the gas or drawn with hot blast conveying supervisor's upstream pipeline section
Even, the output end of the other pipe of regulation gas heating conveys supervisor's middle and lower reaches pipeline section with hot blast and is connected, and the plasma heater is used
Quick heat temperature raising is carried out in the regulation gas to the other pipe conveying of the regulation gas heating.
Preferably, the plasma heater has spaced apart center tubular air chamber and peripheral annular air chamber, described
Pass through at least two branch's transfer pipelines radially arranged from inside to outside between center tubular air chamber and peripheral annular air chamber
Connect, at least provided with a plasma torch on every branch's transfer pipeline；One is provided with the peripheral annular air chamber
Gas input interface is adjusted, an air chamber end interface is provided with the center tubular air chamber；The plasma heater passes through
One regulation gas input interface and an air chamber end interface are connected on the other pipe of regulation gas heating.The plasma of the program
Heater is adapted for mount on the other pipe of regulation gas heating.
Preferably, the plasma heater has spaced apart center tubular air chamber and peripheral annular air chamber, described
Pass through at least two branch's transfer pipelines radially arranged from inside to outside between center tubular air chamber and peripheral annular air chamber
Connect, at least provided with a plasma torch on every branch's transfer pipeline；One is provided with the peripheral annular air chamber
Gas input interface is adjusted, a pair of air chamber end interfaces are provided with the center tubular air chamber；The plasma heater passes through
A pair of air chamber end interfaces are connected on the hot blast conveying supervisor, and positioned at hot blast conveying supervisor and the other pipe knot of regulation gas heating
At conjunction, output end of the regulation gas input interface then with the other pipe of regulation gas heating is connected.The plasma heater of the program is fitted
Close and be arranged on hot blast conveying supervisor.
Preferably, in both the above scheme, the angle between branch's transfer pipeline and center tubular air chamber is acute angle, is used
Favorable current mode is installed, to reduce the input resistance for adjusting gas.Plasma torch can also be installed using favorable current mode, make from
The working gas flow direction and the identical or angle that flows to of regulation gas of sub- torch are acute angle.
Preferably, the input of the other pipe of regulation gas heating is provided with booster fan, the booster fan and plasma
Preheating device is provided with the other pipe of regulation gas heating between heater.
Beneficial effects of the present invention are as follows：
1) present invention heats other pipe and plasma heater using regulation gas is set up, high using heating plasma temperature, and
And the characteristics of Load Regulation can be quickly realized by current regulation control, the controllable regulation gas of temperature flow all the way is introduced, it is real
When adjust hot blast temperature, when original hot blast temperature is in lower temperature, improve plasma heater input heat；When original
When hot blast temperature is in higher temperature, the heat (stopping heating plasma if necessary) of plasma heater input is reduced, is passed through
This mode so that the fluctuating range of metal smelt blast furnace feeding hot blast temperature is greatly reduced, and makes bulk temperature get a promotion.
2) it is different from conventional blending part cold wind to drag down the bulk temperature into the hot blast of metal smelt blast furnace to reach
The constant control mode of temperature, the present invention improve the heat into blast furnace using the part high temperature regulation gas of blending heating plasma
The bulk temperature of wind will not drag down the bulk temperature into stove hot blast to reach the constant control mode of temperature, cold relative to blending
The temperature adjusting mode of wind, metal smelt blast furnace feeding hot blast mean temperature can be improved, with reference to the utilization of waste heat, economic benefit is more
Add significantly.
3) higher than in the mode of heating of 1000 DEG C of temperature ranges, plasma torch heating air efficiency highest, energy consumption is minimum,
Simple system, operate steadily.
4) raising of hot blast temperature and stability contorting, metal smelt pulverized coal injection in blast furnace ratio can be greatly improved, improves high
Stove production efficiency, coke ratio is reduced, reduce carbon emission so that macroeconomy performance is good.
5) the blast-furnace hot-air system temperature adjusting device is simple and reliable, invests small, the transformation to existing blast-furnace hot-air system
Engineering is small, has preferable investment landscape.
Brief description of the drawings
Fig. 1 is the process schematic representation of blast-furnace hot-air system temperature adjusting device in embodiment 1.
Fig. 2, Fig. 3 are respectively the main structure diagram and left view structural representation of plasma heater in Fig. 1；In Fig. 2,
Partial cutaway has been carried out to center tubular air chamber；In Fig. 3, the adpting flange of center tubular air chamber is not drawn into.
Fig. 4 is the process schematic representation of blast-furnace hot-air system temperature adjusting device in embodiment 2.
Fig. 5, Fig. 6 are respectively the main structure diagram and left view structural representation of plasma heater in Fig. 4；In Fig. 5,
Partial cutaway has been carried out to center tubular air chamber；In Fig. 6, the adpting flange of center tubular air chamber is not drawn into.
Fig. 7 is the effect contrast figure of the present invention and blending cold air mode.
Wherein：Metal smelt blast furnace 1, blast furnace gas outlet 1.1, hot blast input endless tube 1.2, high temperature hot-blast furnace 2, combustion gas enter
Mouth 2.1, high temperature air outlet 2.2, normal temperature air entrance 2.3, offgas outlet 2.4, blast furnace gas supervisor 3, hot blast conveying supervisor
4th, branch line 4.1, the other pipe 5 of regulation gas heating, booster fan 6, plasma heater 7, center tubular air chamber 7.1, outer collarette
Shape air chamber 7.2, branch's transfer pipeline 7.3, plasma torch 7.4, regulation gas input interface 7.5, air chamber end interface 7.6, company
Acting flange 7.7, blind plate 7.8, preheating device 8, chimney 9
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figs. 1 to 6, the regulation and control of the blast-furnace hot-air system temperature based on plasma heating designed by the present invention are set
It is standby, including metal smelt blast furnace 1 and the high temperature hot-blast furnace 2 supporting with it.The upper and lower part of metal smelt blast furnace 1 is set respectively
There are blast furnace gas outlet 1.1 and hot blast input endless tube 1.2.The He of fuel gas inlet 2.1 is provided with the heating passage of high temperature hot-blast furnace 2
Offgas outlet 2.4, normal temperature air entrance 2.3 and high temperature air outlet 2.2 are provided with the heat recipient passage of high temperature hot-blast furnace 2.It is high
It is connected between producer gas outlet 1.1 and fuel gas inlet 2.1 by blast furnace gas supervisor 3, high temperature air outlet 2.2 inputs with hot blast
It is connected between endless tube 1.2 by hot blast conveying supervisor 4.It also include adjusting all the way the other pipe 5 of gas heating and the grade supporting with it from
Sub- heater 7.The output end of the other pipe 5 of regulation gas heating conveys 4 middle and lower reaches pipeline sections of supervisor with hot blast and is connected, plasma heater 7
Quick heat temperature raising is carried out for exchanging the regulation gas that the other pipe 5 of solar term heating conveys.
Process system slightly difference, is illustrated individually below used by embodiment 1,2.
Embodiment 1
As shown in Figures 1 to 3, in the present embodiment, the input for adjusting the other pipe 5 of gas heating is provided with booster fan 6, pressurizes
Preheating device 8 is provided with the other pipe 5 of regulation gas heating between blower fan 6 and plasma heater 7.Plasma heater 7 has
Spaced apart center tubular air chamber 7.1 and peripheral annular air chamber 7.2, center tubular air chamber 7.1 and peripheral annular air chamber 7.2 it
Between connected by four branch radially arranged from inside to outside transfer pipelines 7.3, set on every branch's transfer pipeline 7.3
There is a plasma torch 7.4.Angle between branch's transfer pipeline 7.3 and center tubular air chamber 7.1 is acute angle, is adjusted with reducing
The input resistance of solar term.A regulation gas input interface 7.5 is provided with peripheral annular air chamber 7.2, center tubular air chamber 7.1
A pair of adpting flanges 7.7 are provided at both ends with, wherein the adpting flange 7.7 of one end is as air chamber end interface 7.6, the company of the other end
Acting flange is sealed by blind plate 7.8.Plasma heater 7 is connect by a regulation gas input interface 7.5 and an air chamber end
Mouth 7.6 is connected on the other pipe 5 of regulation gas heating.
Embodiment 2
As shown in figures 4-6, in another embodiment, the input for adjusting the other pipe 5 of gas heating is conveyed on supervisor 4 with hot blast
The branch line 4.1 that play pipe section is drawn is connected；The original hot blast of upstream pipeline section is introduced as regulation gas, makes full use of original hot blast
In heat, reduce plasma heater 7 power consumption.Plasma heater 7 has the spaced apart He of center tubular air chamber 7.1
Peripheral annular air chamber 7.2, between center tubular air chamber 7.1 and peripheral annular air chamber 7.2 by four from inside to outside radially
Branch's transfer pipeline 7.3 of arrangement is connected, and a plasma torch 7.4 is provided with every branch's transfer pipeline 7.3.Branch is defeated
It is acute angle to send the angle between pipeline 7.3 and center tubular air chamber 7.1, to reduce the input resistance for adjusting gas.Peripheral annular gas
A regulation gas input interface 7.5 is provided with room 7.2, center tubular air chamber 7.1 is provided at both ends with a pair of adpting flanges
7.7, as air chamber end interface 7.6.Plasma heater 7 is connected to hot blast conveying master by a pair of air chamber end interfaces 7.6
On pipe 4, and positioned at hot blast conveying supervisor 4 and the other junction of pipe 5 of regulation gas heating, regulation gas input interface 7.5 is then with adjusting gas
The output end of the other pipe 5 of heating is connected.
In the embodiment of the above two, the structure of plasma heater 7 is distinguished as：The both ends of center tubular air chamber 7.1 of embodiment 2
It is disposed as being open；And one end of the center tubular air chamber 7.1 of embodiment 1 is arranged to be open, the other end is carried out by blind plate 7.8
Sealing.
The inside of plasma heater 7 can also arrange that many places are strengthened regulation gas and mixed with plasmatorch hot operation gas converting heat
Baffling or point hole structure component, wherein baffling component piled up from resistant to elevated temperatures fireproof insulation brick and formed.
The following provide the method that blast-furnace hot-air system temperature regulation and control are carried out using said temperature adjusting device.
By taking ironmaking as an example, the smelting basic procedure of existing metal smelt blast furnace 1 is：The iron-smelting raw materials such as iron ore, coke
It is fed through in metal smelt blast furnace 1, about 1000 is blasted from the lower portion of furnace body hot blast input high speed of endless tube 1.2 of metal smelt blast furnace 1
High-temperature hot-air more than DEG C, high-temperature hot-air and coke burnt and chemical conversion effect under, being reduced property of iron ore gas is also
Original production molten iron, molten iron are flowed out from bottom, and blast furnace gas is drawn from the furnace roof blast furnace gas outlet 1.1 of metal smelt blast furnace 1,
Then burnt by blast furnace gas supervisor 3, fuel gas inlet 2.1 into high temperature hot-blast furnace 2, heated by way of regenerative heat exchange from
Normal temperature air entrance 2.3 enters the outer cooling air of high temperature hot-blast furnace 2, and cold air is heated to more than 1000 DEG C through offgas outlet
2.4th, hot blast, which conveys, is responsible for 4 feeding hot blasts input endless tubes 1.2, and the tail gas after blast furnace gas combustion enters cigarette from offgas outlet 2.4
Arranged outside chimney 9.
Because high temperature hot-blast furnace 2 is using heat accumulating type or ceramic heat exchanger etc., high-temperature hot-air meeting caused by high temperature hot-blast furnace 2
Because heat-exchanging process brings the fluctuation of temperature with diabatic process, it is unfavorable for stabilizing and increasing for blast furnace feeding temperature.For solution
Certainly problem, the blast-furnace hot-air system temperature adjusting device provided in Application Example 1,2 of the present invention, is carried out in accordance with the following steps
The temperature adjusting of blast-furnace hot-air system：
1) input that other pipe 5 is heated from regulation gas introduces regulation gas, and exchanging solar term by plasma heater 7 is carried out soon
Fast heat temperature raising, plasma heater 7 are added using (more than the about 5500 DEG C) working gas of high temperature caused by plasma torch 7.4
Thermal conditioning gas.
The general power of plasma heater 7 is set according to hot blast regulation load, using 4 Marc-11 plasma torches,
The peak power of separate unit plasma torch is 2.4MW, minimum power 0.8MW, plasma working gas flow about 500kg/hr.
For embodiment 1, regulation gas uses outside air, and outside air first passes around the pressurized treatments of booster fan 6 to guarantor
Card regulation gas can smooth delivery of power to blast furnace gas be responsible for 3 pressure, be then preheated to about 500 DEG C by preheating device 8, then lead to
Cross plasma heater 7 and carry out quick heat temperature raising.
For embodiment 2, regulation gas uses the upstream for the extraction of branch line 4.1 that 4 upstream pipeline sections of supervisor are conveyed from hot blast
Hot blast, it directly carries out quick heat temperature raising by plasma heater 7.
2) output end that gained high temperature is adjusted to gas from the other pipe 5 of regulation gas heating is drawn, and is sent in hot blast conveying supervisor 4
In the pipeline section of downstream, it is set to be mixed with temperature in hot blast conveying supervisor 4 with the larger upstream hot blast of time fluctuation.
3) adjusted in the other pipe 5 of gas heating and adjusted by the heating power and/or dynamic control of dynamic control plasma heater 7
The flow of solar term, that improves metal smelt blast furnace 1 enters stove hot blast temperature, while reduces the fluctuation width into stove hot blast temperature with the time
Degree.
The dynamic control uses fuzzy mathematics Collaborative Control technology, permanent to enter the hot blast temperature of metal smelt blast furnace 1
It is set for as the first control targe, it is minimum as the second control targe to consume power using plasma heater 7, with into metal smelt
The hot blast temperature lifting degree of blast furnace 1 is maximum to be used as the 3rd control targe.Preferentially reach the first control targe during dynamic control, secondly
Reach the second control targe, finally reach into the 3rd control targe.Meet following mathematical relationship between its main control parameters：
In formula：F is functional symbol；P is the general power of plasma heater 7；T1、Q1For the temperature of plasma working gas
Degree and flow；T2、Q2For the high temperature air outlet temperature and flow of high temperature hot-blast furnace 2；T3、Q3For the height after plasma heating
Warm climate comfort degree and flow；T4、Q4For the entrance high-temperature hot-air temperature of metal smelt blast furnace 1 and flow；C0For hot blast specific heat.Formula
In the unit of each physical quantity use the SI system of units.
In actual control process, relatively reliable or accurate survey can be also detected according to actual flow, pressure or pressure difference etc.
Value participates in the process of fuzzy control, and this is only the change for controlling variable format, and its major control principle is not in that essence changes
Become.
By above step, high-temperature hot-air of the temperature fluctuation range in economical rationality scope is obtained, it is high to be sent into metal smelt
Stove 1 uses for iron-smelting process.
As shown in fig. 7, the hot blast charging temperature of metal smelt blast furnace is 1000~1200 DEG C before regulation and control, mean temperature is
1100℃；Mean temperature brings up to 1200 DEG C after regulation and control；And it is 1070 DEG C to blend the mean temperature that cold wind mode obtains.Obviously,
The temperature fluctuation of the present invention program is smaller, and realizes the raising of hot blast temperature.
From the point of view of the summing up experience that metal smelt blast furnace 1 produces for many years, 55.5 DEG C of wind-warm syndrome is often improved, coke ratio 12.5 can be reduced
Kg/tonne iron, production efficiency about 2.5% is improved, while hot blast temperature improves and also improves the torch firing coal dust of metal smelt blast furnace 1
Ratio, the inside coke consumption of metal smelt blast furnace 1 is reduced, thus realize reduction Ironmaking Coke Ratio number.Cold wind is mixed relative to existing
Control methods, in embodiment 1,2, the stove hot blast temperature that enters of metal smelt blast furnace improves 130 DEG C, and it is public to reduce coke ratio 40
Jin/ton iron, CO2 emission 2%~6% is reduced, from the operational stability and warp that ironmaking system can be greatly improved in general
Ji benefit.
Claims (9)
1. a kind of blast-furnace hot-air system temperature regulation and control method based on plasma heating, the blast-furnace hot-air system include metal
The hot blast conveying supervisor (4) of steelmaking furnace (1), high temperature hot-blast furnace (2) and connection between, it is characterised in that：
This method is that the middle and lower reaches pipeline section setting that supervisor (4) is conveyed in hot blast at least adjusts the other pipe (5) of gas heating, Yi Jiyong all the way
The plasma heater (7) of quick heat temperature raising is carried out in the regulation gas for exchanging other pipe (5) conveying of solar term heating, and including following
Step：
1) regulation gas is introduced from the input of the other pipe (5) of regulation gas heating, and drawn from the output end of the other pipe (5) of regulation gas heating
Go out, be sent in the middle and lower reaches pipeline section of hot blast conveying supervisor (4), make its convey with hot blast supervisor's (4) interior temperature with time fluctuation compared with
Big upstream hot blast mixing；
2) plasma heater (7) exchanges solar term and carries out quick heat temperature raising on demand, passes through dynamic control plasma heater (7)
Heating power and/or the other pipe (5) of dynamic control regulation gas heating in regulation gas flow, reduce metal smelt blast furnace (1)
Enter fluctuating range of the stove hot blast temperature with the time.
2. the blast-furnace hot-air system temperature regulation and control method based on plasma heating according to claim 1, it is characterised in that：
The regulation gas uses outside air, and outside air first passes around pressurized treatments, is then preheated to 200~800 DEG C, then pass through
Ion Heating device (7) carries out quick heat temperature raising.
3. the blast-furnace hot-air system temperature regulation and control method based on plasma heating according to claim 1, it is characterised in that：
The regulation gas uses the upstream hot blast for branch line (4.1) extraction that supervisor's (4) upstream pipeline section is conveyed from hot blast, and it is directly logical
Cross plasma heater (7) and carry out quick heat temperature raising.
4. the blast-furnace hot-air system temperature regulation and control method based on plasma heating according to claim 1, it is characterised in that：
The mass flow of the regulation gas is the 5~30% of hot blast conveying supervisor's (4) interior upstream hot blast mass flow.
5. the blast-furnace hot-air system temperature regulation and control method based on plasma heating according to any one of Claims 1 to 4,
It is characterized in that：The dynamic control uses fuzzy mathematics Collaborative Control technology, to enter the hot blast temperature of metal smelt blast furnace (1)
Spend it is constant be used as the first control targe, be used as the second control targe so that plasma heater (7) consumption power is minimum, it is golden to enter
The hot blast temperature lifting degree of category steelmaking furnace (1) is maximum to be used as the 3rd control targe；Preferentially reach the first control during dynamic control
Target, next reaches the second control targe, finally reaches into the 3rd control targe.
6. a kind of blast-furnace hot-air system temperature adjusting device based on plasma heating, including metal smelt blast furnace (1) and with
Its supporting high temperature hot-blast furnace (2)；The upper and lower part of the metal smelt blast furnace (1) is respectively arranged with blast furnace gas outlet
(1.1) and hot blast inputs endless tube (1.2)；Fuel gas inlet (2.1) and tail are provided with the heating passage of the high temperature hot-blast furnace (2)
Gas exports (2.4), is provided with normal temperature air entrance (2.3) on the heat recipient passage of the high temperature hot-blast furnace (2) and high temperature air goes out
Mouth (2.2)；(3) are responsible between the blast furnace gas outlet (1.1) and the fuel gas inlet (2.1) by blast furnace gas to be connected,
Supervisor (4) is conveyed between the high temperature air outlet (2.2) and hot blast input endless tube (1.2) by hot blast to be connected, it is special
Sign is：
It also includes at least adjusting the other pipe (5) of gas heating and the plasma heater supporting with it (7) all the way；The regulation gas adds
The branch line that the input of hot other pipe (5) is connected with extraneous source of the gas or drawn with hot blast conveying supervisor's (4) upstream pipeline section
(4.1) it is connected, the output end of the other pipe (5) of regulation gas heating conveys supervisor's (4) middle and lower reaches pipeline section with hot blast and is connected, described etc.
Ion Heating device (7) is used to carry out quick heat temperature raising to the regulation gas of other pipe (5) conveying of the regulation gas heating.
7. the blast-furnace hot-air system temperature adjusting device based on plasma heating according to claim 6, it is characterised in that：
The plasma heater (7) has spaced apart center tubular air chamber (7.1) and peripheral annular air chamber (7.2), in described
Pass through at least two branches radially arranged from inside to outside between heart tubular air chamber (7.1) and peripheral annular air chamber (7.2)
Transfer pipeline (7.3) connects, at least provided with a plasma torch (7.4) on every branch's transfer pipeline (7.3)；It is described outer
Enclose and a regulation gas input interface (7.5) is provided with ring-shaped air chamber (7.2), be provided with the center tubular air chamber (7.1)
One air chamber end interface (7.6)；The plasma heater (7) passes through a regulation gas input interface (7.5) and a gas
Room end interface (7.6) is connected on the other pipe (5) of regulation gas heating.
8. the blast-furnace hot-air system temperature adjusting device based on plasma heating according to claim 6, it is characterised in that：
The plasma heater (7) has spaced apart center tubular air chamber (7.1) and peripheral annular air chamber (7.2), in described
Pass through at least two branches radially arranged from inside to outside between heart tubular air chamber (7.1) and peripheral annular air chamber (7.2)
Transfer pipeline (7.3) connects, at least provided with a plasma torch (7.4) on every branch's transfer pipeline (7.3)；It is described outer
Enclose and a regulation gas input interface (7.5) is provided with ring-shaped air chamber (7.2), be provided with the center tubular air chamber (7.1)
A pair of air chamber end interfaces (7.6)；The plasma heater (7) is connected to described by a pair of air chamber end interfaces (7.6)
On hot blast conveying supervisor (4), and it is defeated positioned at hot blast conveying supervisor (4) and other pipe (5) junction of regulation gas heating, the regulation gas
Output end of the incoming interface (7.5) then with the other pipe (5) of regulation gas heating is connected.
9. the blast-furnace hot-air system temperature adjusting device based on plasma heating, its feature exist according to claim 7 or 8
In：The input of the other pipe (5) of regulation gas heating is provided with booster fan (6), the booster fan (6) and heating plasma
Preheating device (8) is provided with the other pipe (5) of regulation gas heating between device (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710756425.9A CN107574273A (en) | 2017-08-29 | 2017-08-29 | Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating |
| PCT/CN2018/100980 WO2019042155A1 (en) | 2017-08-29 | 2018-08-17 | Plasma heating-based temperature regulation method and device for blast furnace hot air system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710756425.9A CN107574273A (en) | 2017-08-29 | 2017-08-29 | Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019042155A1 (en) * | 2017-08-29 | 2019-03-07 | 武汉丰盈长江生态科技研究总院有限公司 | Plasma heating-based temperature regulation method and device for blast furnace hot air system |
| CN112722320A (en) * | 2020-12-22 | 2021-04-30 | 华中科技大学 | High-precision and quick-response total temperature simulation device |
| CN114634999A (en) * | 2022-03-25 | 2022-06-17 | 新疆八一钢铁股份有限公司 | Oxygen blast furnace gas ultrahigh-temperature heating smelting method |
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| WO2019042155A1 (en) | 2019-03-07 |
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Application publication date: 20180112 |