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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
blast
hot
heating
furnace
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710756425.9A
Other languages
Chinese (zh)
Inventor
陈义龙
张亮
韩旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Kaidi Engineering Technology Research Institute Co Ltd
Original Assignee
Wuhan Kaidi Engineering Technology Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Kaidi Engineering Technology Research Institute Co Ltd filed Critical Wuhan Kaidi Engineering Technology Research Institute Co Ltd
Priority to CN201710756425.9A priority Critical patent/CN107574273A/en
Publication of CN107574273A publication Critical patent/CN107574273A/en
Priority to PCT/CN2018/100980 priority patent/WO2019042155A1/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B9/00Stoves 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

Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating
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).
CN201710756425.9A 2017-08-29 2017-08-29 Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating Pending CN107574273A (en)

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

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CN107574273A true CN107574273A (en) 2018-01-12

Family

ID=61030350

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710756425.9A Pending CN107574273A (en) 2017-08-29 2017-08-29 Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating

Country Status (2)

Country Link
CN (1) CN107574273A (en)
WO (1) WO2019042155A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970290A (en) * 1973-03-26 1976-07-20 Skf Industrial Trading And Development Company, B.V. Arrangement for feeding
US4455165A (en) * 1982-06-09 1984-06-19 Skf Steel Engineering Ab Increasing blast temperature
EP0215721A1 (en) * 1985-09-20 1987-03-25 Institut De Recherches De La Siderurgie Francaise (Irsid) Process and device for the repair of an overheated gas conduit lining by a plasma torch
CN201305608Y (en) * 2008-12-05 2009-09-09 攀枝花新钢钒股份有限公司 Air heating furnace tandem pre-heating system
CN101749731A (en) * 2009-12-31 2010-06-23 中冶南方工程技术有限公司 Automatic optimal combustion intelligent control system for hot blast stove
CN101865467A (en) * 2010-06-12 2010-10-20 郑州豫兴耐火材料有限公司 Spiral flow up jet premix and preheat burner with circuit and porous regenerator
CN102348814A (en) * 2009-03-17 2012-02-08 保尔伍斯股份有限公司 Method for feeding hot gas to a shaft furnace
CN103451342A (en) * 2013-09-05 2013-12-18 鞍钢股份有限公司 Device and method for increasing temperature of hot air in blast furnace
CN103924021A (en) * 2014-03-24 2014-07-16 上海金自天正信息技术有限公司 Blast furnace and hot blast stove constant-pressure changing system and method thereof
CN205152253U (en) * 2015-09-01 2016-04-13 新日铁住金工程技术株式会社 Waste heat recovery unit and hot -blast furnace equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE815963A (en) * 1974-06-05 1974-09-30 HOT REDUCING GAS MANUFACTURING PROCESS.
CN101709346B (en) * 2009-12-25 2011-06-15 重庆科技学院 High coke oven gas mixing air supply device of blast furnace hot blast system
CN103525959A (en) * 2013-09-23 2014-01-22 攀钢集团攀枝花钢钒有限公司 Method for controlling air temperature of blast furnace
CN107574273A (en) * 2017-08-29 2018-01-12 武汉凯迪工程技术研究总院有限公司 Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970290A (en) * 1973-03-26 1976-07-20 Skf Industrial Trading And Development Company, B.V. Arrangement for feeding
US4455165A (en) * 1982-06-09 1984-06-19 Skf Steel Engineering Ab Increasing blast temperature
EP0215721A1 (en) * 1985-09-20 1987-03-25 Institut De Recherches De La Siderurgie Francaise (Irsid) Process and device for the repair of an overheated gas conduit lining by a plasma torch
CN201305608Y (en) * 2008-12-05 2009-09-09 攀枝花新钢钒股份有限公司 Air heating furnace tandem pre-heating system
CN102348814A (en) * 2009-03-17 2012-02-08 保尔伍斯股份有限公司 Method for feeding hot gas to a shaft furnace
CN101749731A (en) * 2009-12-31 2010-06-23 中冶南方工程技术有限公司 Automatic optimal combustion intelligent control system for hot blast stove
CN101865467A (en) * 2010-06-12 2010-10-20 郑州豫兴耐火材料有限公司 Spiral flow up jet premix and preheat burner with circuit and porous regenerator
CN103451342A (en) * 2013-09-05 2013-12-18 鞍钢股份有限公司 Device and method for increasing temperature of hot air in blast furnace
CN103924021A (en) * 2014-03-24 2014-07-16 上海金自天正信息技术有限公司 Blast furnace and hot blast stove constant-pressure changing system and method thereof
CN205152253U (en) * 2015-09-01 2016-04-13 新日铁住金工程技术株式会社 Waste heat recovery unit and hot -blast furnace equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
WO2019042155A1 (en) 2019-03-07

Similar Documents

Publication Publication Date Title
CN101762154B (en) Energy-saving ceramic tunnel kiln
CN103673592B (en) The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air
CN106440811A (en) Igniting device and ignition method for sintering
CN103727784B (en) A kind of energy saving of system method of domestic ceramics oxygen-enriched combusting shuttle kiln
CN107574273A (en) Blast-furnace hot-air system temperature regulation and control method and apparatus based on plasma heating
CN104805247B (en) A kind of energy-conservation regulation and control method of blast funnace hot blast stove combustion fan
CN104457215B (en) A kind of method that melting iron block prepares high temperature iron liquid
CN206014993U (en) A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system
CN103940213A (en) Coke drying system dry gas temperature and flow self-adjustment control device and method
CN208382139U (en) A kind of flue gas recirculation system of low nitrogen burning
CN213335575U (en) Chain grate machine, drying and preheating system and chain grate machine-rotary kiln sintering system
CN214032565U (en) Blast furnace blast humidifying device
CN113755661A (en) Blast furnace hot blast stove flue gas air intake system for coke drying and control method
CN204739904U (en) Waste heat recovery sintering ignition furnace
CN209558325U (en) A kind of heating furnace flue gas recirculation burner
CN112239797A (en) Large blast furnace top combustion type hot blast furnace vault temperature control technology
CN214655158U (en) Rotary hearth furnace system for preparing metallized pellets based on oxygen-enriched combustion
CN205838912U (en) A kind of coke oven combustion chamber segmentation supply heater
CN205402691U (en) Boiler
CN201621973U (en) Electric furnace flue gas waste heat recovery utilization device
CN103922561A (en) Energy-saving gas glass melting furnace
CN205228172U (en) A hot air system and smelting device for smelt
CN204619705U (en) A kind of ventilation air methane oxidized apparatus
CN216473396U (en) Low-carbon sintering system
CN203807326U (en) Energy-saving fuel gas glass melting furnace

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20180112

RJ01 Rejection of invention patent application after publication