CN104748568A - Heating method and system based on steel rolling heating furnace - Google Patents

Heating method and system based on steel rolling heating furnace Download PDF

Info

Publication number
CN104748568A
CN104748568A CN201510158776.0A CN201510158776A CN104748568A CN 104748568 A CN104748568 A CN 104748568A CN 201510158776 A CN201510158776 A CN 201510158776A CN 104748568 A CN104748568 A CN 104748568A
Authority
CN
China
Prior art keywords
combustion
gas
oxygen
control valve
flow
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
CN201510158776.0A
Other languages
Chinese (zh)
Inventor
陈冠军
胡帅
代云红
吴刚
王泽举
王敏
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.)
Shougang Corp
Original Assignee
Shougang Corp
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 Shougang Corp filed Critical Shougang Corp
Priority to CN201510158776.0A priority Critical patent/CN104748568A/en
Publication of CN104748568A publication Critical patent/CN104748568A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention relates to the field of a metallurgical technology, and discloses a heating method and a heating system based on a steel rolling heating furnace. The method comprises the steps of denitrifying a part of combustion-supporting gas to generate oxygen-enriched combustion-supporting gas; preheating the oxygen-enriched combustion-supporting gas; preheating coal gas; mixing and feeding the oxygen-enriched combustion-supporting gas and the preheated coal gas to a soaking zone of the heating furnace to carry out oxygen-enriched combustion; mixing and feeding a part of oxygen-enriched combustion-supporting gas and the preheated coal gas into a heating section of the heating furnace to carry out pulse-combustion; and preheating the oxygen-enriched combustion-supporting gas and the coal gas through furnace tail flue gas. According to the method provided by the invention, an oxygen-enriched combustion technology, a pulse combustion technology and a heat accumulating type combustion technology can be combined to realize coupling application on the oxygen-enriched combustion technology and the heat accumulating type combustion technology on the steel rolling heating furnace, the technical advantages of heat accumulating type combustion, oxygen-enriched combustion and pulse combustion can be integrated, and the heat transfer speed and heating speed in the steel rolling and heating process can be accelerated to finally realize the energy-saving and cost-reducing of the steel rolling heating furnace.

Description

A kind of heating means based on heater for rolling steel and system
Technical field
The present invention relates to metallurgical technology field, be mainly applicable to the heating means based on heater for rolling steel and system.
Background technology
Heater for rolling steel is the main energy consumption equipment of rolling system, accounts for 60 ~ 70% of steel rolling energy consumption, and therefore, the energy-conservation emphasis of steel rolling process is the energy-conservation of heater for rolling steel.Along with the increase of steel rolling production capacity in recent years, the quantity of heater for rolling steel is also in continuous increase, and heater for rolling steel is also towards future developments such as large-scale, efficient, low stain.Along with the progress of heater for rolling steel technology, the power-saving technology constantly application implementations on heater for rolling steel such as step rate, heat storage type combustion, Vaporizing cooling, energy-saving coatings, hot-loading and hot-conveying, oxygen-enriched combusting, pulse-combustion and procedure parameter optimal control, thus Energy Saving In Reheating Furnaces For Roling has been made significant headway.But, because the application principle of each power-saving technology is different, as regenerative combustion technology it is emphasised that High Temperature Air Combustion, require oxygen content lower than or equal 15%; And oxygen-enriched combusting is it is emphasised that oxygen enriching, require that oxygen content is higher than 21%; Pulse-combustion is it is emphasised that the discontinuity of burning, and conventional combustion is it is emphasised that the continuity of burning, therefore, in the prior art, heat storage type combustion, oxygen-enriched combusting and pulse-combustion cannot be carried out coupling application, thus finally realize the energy-efficient of heater for rolling steel.
Summary of the invention
The invention provides a kind of heating means based on heater for rolling steel and system, oxygen-enriched combusting, combustion with meagre oxygen and intermittent burning can combine by effectively, solve the oxygen enrichment in power-saving technology application process, oxygen deprivation, interruption and the conflicting problem of uninterrupted burning, combine the technical advantage of heat storage type combustion, oxygen-enriched combusting and pulse-combustion, accelerate the heat transfer rate in steel rolling heating process and firing rate, finally achieve the energy-saving and cost-reducing of heater for rolling steel.
For solving the problems of the technologies described above, the invention provides a kind of heating means based on heater for rolling steel, comprising:
By a part of combustion-supporting gas denitrogenation, generate oxygen-enriched combustion-supporting gas;
Preheating is carried out to described oxygen-enriched combustion-supporting gas;
Preheating is carried out to coal gas;
Oxygen-enriched combustion-supporting gas after preheating is mixed with the coal gas after a part of preheating the soaking zone passing into heating furnace and carries out oxygen-enriched combusting;
Described for part combustion-supporting gas is mixed with the coal gas after a part of preheating the bringing-up section passing into described heating furnace and carries out pulse-combustion;
By the stove exit gas of described heating furnace, preheating is carried out to oxygen-enriched combustion-supporting gas and coal gas.
Further, also comprise:
Oxygen enrichment percentage during detection oxygen-enriched combusting and coefficient of excess air, according to described oxygen enrichment percentage and described coefficient of excess air, the flow to described oxygen-enriched combustion-supporting gas and described coal gas regulates;
Detect coefficient of excess air during pulse-combustion, regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas.
Further, described according to described oxygen enrichment percentage and described coefficient of excess air, the flow to described oxygen-enriched combustion-supporting gas and described coal gas regulates, and comprising:
When described oxygen enrichment percentage is greater than the first preset value or described coefficient of excess air is less than the second preset value, then reduces the flow of described oxygen-enriched combustion-supporting gas or strengthen the flow of described coal gas;
When described oxygen enrichment percentage is less than the 3rd preset value or described coefficient of excess air is greater than the 4th preset value, then strengthens the flow of described oxygen-enriched combustion-supporting gas or reduce the flow of described coal gas;
Wherein, described first preset value is greater than described 3rd preset value, and described 4th preset value is greater than described second preset value.
Further, also comprise: the oxygen content in the stove exit gas of heating furnace when detecting described oxygen-enriched combusting, described to regulate according to described oxygen enrichment percentage and the described coefficient of excess air flow to described oxygen-enriched combustion-supporting gas and described coal gas after, regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described oxygen-enriched combustion-supporting gas and described coal gas.
Further, describedly to regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described oxygen-enriched combustion-supporting gas and described coal gas, comprising:
When oxygen content in the stove exit gas of described heating furnace is less than the 5th preset value, when described gas flow is constant, strengthen the flow of described oxygen-enriched combustion-supporting gas; Or, when described oxygen-enriched combustion-supporting gas flow is constant, reduce the flow of described coal gas;
When oxygen content in the stove exit gas of described heating furnace is greater than the 6th preset value, when described gas flow is constant, reduce the flow of described oxygen-enriched combustion-supporting gas; Or, when described oxygen-enriched combustion-supporting gas flow is constant, strengthen the flow of described coal gas;
Wherein, described 6th preset value is greater than described 5th preset value.
Further, describedly to regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas, comprising:
When described coefficient of excess air is greater than the 7th preset value, strengthens the flow of described combustion-supporting gas or reduce the flow of described coal gas;
When described coefficient of excess air is less than the 8th preset value, reduces the flow of described combustion-supporting gas or strengthen the flow of described coal gas;
Wherein, described 7th preset value is greater than described 8th preset value.
Further, also comprise: the oxygen content in the stove exit gas of heating furnace when detecting described pulse-combustion, described to regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas after, regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described combustion-supporting gas and described coal gas; Be specially:
When oxygen content in the stove exit gas of described heating furnace is less than the 9th preset value, when described gas flow is constant, strengthen the flow of described combustion-supporting gas; Or, when described combustion-supporting gas flow is constant, reduce the flow of described coal gas;
When oxygen content in the stove exit gas of described heating furnace is greater than the tenth preset value, when described gas flow is constant, reduce the flow of described combustion-supporting gas; Or, when described combustion-supporting gas flow is constant, strengthen the flow of described coal gas;
Wherein, described tenth preset value is greater than described 9th preset value.
Present invention also offers a kind of heating system based on heater for rolling steel, comprising: combustion-supporting gas memory device, coal gas memory device, air separation plant, First Heat Exchanger, the second heat exchanger, oxygen enrichment burner, heating furnace and impulse burner; Described oxygen enrichment burner is arranged on the soaking zone of described heating furnace; Described impulse burner is arranged on the bringing-up section of described heating furnace; First output of described combustion-supporting gas memory device is connected with the input of described air separation plant; The output of described air separation plant is connected with the first input end of described First Heat Exchanger; First output of described First Heat Exchanger is connected with the input of described oxygen enrichment burner; Second output of described combustion-supporting gas memory device is connected with the input of described impulse burner; The output of described coal gas memory device is connected with the first input end of described second heat exchanger; First output of described second heat exchanger is connected with the input of described oxygen enrichment burner, described impulse burner; The stove exit gas of described heating furnace is discharged by described First Heat Exchanger and described second heat exchanger.
Further, also comprise: first flow control valve, second adjustable valve, the 3rd flow control valve, the 4th flow control valve, the 5th flow control valve, the 6th flow control valve, the 7th flow control valve and the 8th flow control valve; Described oxygen enrichment burner comprises: the first oxygen enrichment burner, the second oxygen enrichment burner, the 3rd oxygen enrichment burner and the 4th oxygen enrichment burner; First output of described First Heat Exchanger is connected with the input of described first oxygen enrichment burner by described first flow control valve, first output of described First Heat Exchanger is connected with the input of described second oxygen enrichment burner by described second adjustable valve, first output of described First Heat Exchanger is connected with the input of described 3rd oxygen enrichment burner by described 3rd flow control valve, and the first output of described First Heat Exchanger is connected with the input of described 4th oxygen enrichment burner by described 4th flow control valve; First output of described second heat exchanger is connected with the input of described first oxygen enrichment burner by described 5th flow control valve, first output of described second heat exchanger is connected with the input of described second oxygen enrichment burner by described 6th flow control valve, first output of described second heat exchanger is connected with the input of described 3rd oxygen enrichment burner by described 7th flow control valve, and the first output of described second heat exchanger is connected with the input of described 4th oxygen enrichment burner by described 8th flow control valve.
Further, also comprise: the first reversal valve, the second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 9th flow control valve, the tenth flow control valve, the 11 flow control valve, the 12 flow control valve, the 13 flow control valve, the 14 flow control valve, the 15 flow control valve and the 16 flow control valve, described impulse burner comprises: the first impulse burner, the second impulse burner, the 3rd impulse burner and the 4th impulse burner, second output of described combustion-supporting gas memory device is connected with described 9th flow control valve by described first reversal valve, described 9th flow control valve is connected with the input of described first impulse burner, second output of described combustion-supporting gas memory device is connected with described tenth flow control valve by described second reversal valve, described tenth flow control valve is connected with the input of described second impulse burner, second output of described combustion-supporting gas memory device is connected with described 11 flow control valve by described 3rd reversal valve, described 11 flow control valve is connected with the input of described 3rd impulse burner, second output of described combustion-supporting gas memory device is connected with described 12 flow control valve by described 4th reversal valve, described 12 flow control valve is connected with the input of described 4th impulse burner, first output of described second heat exchanger is connected with described 13 flow control valve, described 13 flow control valve is connected with the input of described first impulse burner, and the first output of described second heat exchanger is connected with described 14 flow control valve, and described 14 flow control valve is connected with the input of described second impulse burner, first output of described second heat exchanger is connected with described 15 flow control valve, and described 15 flow control valve is connected with the input of described 3rd impulse burner, first output of described second heat exchanger is connected with described 16 flow control valve, and described 16 flow control valve is connected with the input of described 4th impulse burner.
Beneficial effect of the present invention is:
Heating means based on heater for rolling steel provided by the invention and system, by oxygen-enriched combustion technology, pulse combustion technology and regenerative combustion technology combine, utilize fume afterheat classification preheating gas and oxygen-enriched combustion-supporting air, achieve oxygen-enriched combustion technology and the coupling application of regenerative combustion technology on heater for rolling steel, effective recovery and make use of high-temperature flue gas waste heat, decrease heat loss due to exhaust gas, improve the furnace temperature of heater for rolling steel and the uniformity of furnace temperature, reduce the stove unit consumption of steel rolling heating, improve heating intensity and the efficiency of heating surface of heater for rolling steel, and shorten the heat time of steel billet at stove, achieve the rapidly and efficiently heating of steel billet.In addition, the present invention also has the advantage of environmental protection.
Accompanying drawing explanation
The flow chart of the heating means based on heater for rolling steel that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the heating system based on heater for rolling steel that Fig. 2 provides for the embodiment of the present invention;
The axial schematic diagram based on oxygen enrichment burner in the heating system of heater for rolling steel that Fig. 3 provides for the embodiment of the present invention.
Wherein, 1-air blast, 2-air valve, 3-air separation plant, 4-First Heat Exchanger, 5-heating furnace, 6-second adjustable valve, 7-air-introduced machine, 8-second heat exchanger, 9-first reversal valve, 10-the 3rd reversal valve, 11-first flow control valve, 12-the 5th flow control valve, 13-the 3rd flow control valve, 14-the 7th flow control valve, 15-first stop valve, 16-the 9th flow control valve, 17-the 3rd stop valve, 18-the 13 flow control valve, 19-the 5th stop valve, 20-the 11 flow control valve, 21-the 7th stop valve, 22-the 15 flow control valve, 23-first oxygen enrichment burner, 24-partition wall, 25-first impulse burner, 26-the 3rd impulse burner, 27-second impulse burner, 28-the 4th impulse burner, 29-the 6th flow control valve, 30-the 8th flow control valve, 31-the tenth flow control valve, 32-second stop valve, 33-the 14 flow control valve, 34-the 4th stop valve, 35-the 12 flow control valve, 36-the 6th stop valve, 37-the 16 flow control valve, 38-the 8th stop valve, 39-the 4th flow control valve, 40-second reversal valve, 41-the 4th reversal valve, 42-excircle, 43-oxygen-enriched combustion-supporting gas spout, 44-inner periphery, 45-gas port, 46-second oxygen enrichment burner, 47-the 3rd oxygen enrichment burner, 48-the 4th oxygen enrichment burner, 49-combustion-supporting gas memory device, 50-coal gas memory device.
Detailed description of the invention
For setting forth the present invention further for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to being described in detail based on the heating means of heater for rolling steel and the detailed description of the invention of system and operation principle of proposing according to the present invention.
See Fig. 1, the heating means based on heater for rolling steel that the embodiment of the present invention provides, comprising:
Step S110: by a part of combustion-supporting gas denitrogenation, generates oxygen-enriched combustion-supporting gas;
Step S120: preheating is carried out to oxygen-enriched combustion-supporting gas;
Step S130: preheating is carried out to coal gas;
Step S140: the oxygen-enriched combustion-supporting gas after preheating is mixed with the coal gas after a part of preheating the soaking zone passing into heating furnace and carries out oxygen-enriched combusting;
It should be noted that, in the process of oxygen-enriched combusting, oxygen enrichment percentage during detection oxygen-enriched combusting and coefficient of excess air, according to oxygen enrichment percentage and coefficient of excess air, the flow to oxygen-enriched combustion-supporting gas and coal gas regulates; Particularly,
When oxygen enrichment percentage is greater than the first preset value or coefficient of excess air is less than the second preset value, then reduces the flow of oxygen-enriched combustion-supporting gas or strengthen the flow of coal gas until oxygen enrichment percentage is equal to or less than the first preset value or coefficient of excess air is equal to, or greater than the second preset value;
When oxygen enrichment percentage is less than the 3rd preset value or coefficient of excess air is greater than the 4th preset value, then strengthens the flow of oxygen-enriched combustion-supporting gas or reduce the flow of coal gas until oxygen enrichment percentage is equal to, or greater than the 3rd preset value or coefficient of excess air is equal to or less than the 4th preset value.
Wherein, the first preset value, the second preset value, the 3rd preset value and the 4th preset value are comprehensively determined by the burning condition of oxygen-enriched combusting and burning cost, and the first preset value is greater than the 3rd preset value, and the 4th preset value is greater than the second preset value.
Here also it should be noted that, in the process of oxygen-enriched combusting, oxygen content in the stove exit gas of the heating furnace also during detection oxygen-enriched combusting, after regulating according to oxygen enrichment percentage and the coefficient of excess air flow to oxygen-enriched combustion-supporting gas and coal gas, carry out feedback regulation according to the flow of the oxygen content in the stove exit gas of heating furnace to oxygen-enriched combustion-supporting gas and coal gas.
Particularly, when the oxygen content in the stove exit gas of heating furnace is less than the 5th preset value, when gas flow is constant, strengthen the flow of oxygen-enriched combustion-supporting gas until heating furnace stove exit gas in oxygen content be greater than or equal to the 5th preset value; Or, when oxygen-enriched combustion-supporting gas flow is constant, reduce coal gas flow until heating furnace stove exit gas in oxygen content be greater than or equal to the 5th preset value;
When oxygen content in the stove exit gas of heating furnace is greater than the 6th preset value, when gas flow is constant, reduce the flow of oxygen-enriched combustion-supporting gas until heating furnace stove exit gas in oxygen content be less than or equal to the 6th preset value; Or, when oxygen-enriched combustion-supporting gas flow is constant, strengthen coal gas flow until heating furnace stove exit gas in oxygen content be less than or equal to the 6th preset value.
Wherein, the 5th preset value and the 6th preset value are comprehensively determined with burning cost by the burning condition of oxygen-enriched combusting, and the 6th preset value is greater than the 5th preset value.
Step S150: a part of combustion-supporting gas is mixed with the coal gas after a part of preheating the bringing-up section passing into heating furnace and carries out pulse-combustion; Particularly,
Within the first interval time, mixed combustion is carried out in the first side of the bringing-up section and two bringing-up sections that the coal gas after combustion air and preheating are passed into respectively heating furnace, extracts high-temperature flue gas out in a bringing-up section of heating furnace and the second side of two bringing-up sections;
Within the second interval time, extract high-temperature flue gas out in a bringing-up section of heating furnace and the first side of two bringing-up sections, mixed combustion is carried out in the second side of the bringing-up section and two bringing-up sections that the coal gas after combustion air and preheating are passed into respectively heating furnace.
It should be noted that, in the process of pulse-combustion, detect coefficient of excess air during pulse-combustion, regulate according to the flow of coefficient of excess air to combustion-supporting gas and coal gas.Particularly,
When coefficient of excess air is greater than the 7th preset value, strengthens the flow of combustion-supporting gas or reduce the flow of coal gas until coefficient of excess air is less than or equal to the 7th preset value;
When coefficient of excess air is less than the 8th preset value, reduces the flow of combustion-supporting gas or strengthen the flow of coal gas until coefficient of excess air is greater than or equal to the 8th preset value.
Wherein, the 7th preset value and the 8th preset value are comprehensively determined with burning cost by the burning condition of heat storage type combustion and pulse-combustion, and the 7th preset value is greater than the 8th preset value.
Here also it should be noted that, in the process of pulse-combustion, oxygen content in the stove exit gas of the heating furnace also during detection pulse-combustion, after regulating according to the flow of coefficient of excess air to combustion-supporting gas and coal gas, carry out feedback regulation according to the flow of the oxygen content in the stove exit gas of heating furnace to combustion-supporting gas and coal gas; Be specially:
When oxygen content in the stove exit gas of heating furnace is less than the 9th preset value, when gas flow is constant, strengthen combustion-supporting gas flow until heating furnace stove exit gas in oxygen content be greater than or equal to the 9th preset value; Or, when combustion-supporting gas flow is constant, reduce coal gas flow until heating furnace stove exit gas in oxygen content be greater than or equal to the 9th preset value;
When oxygen content in the stove exit gas of heating furnace is greater than the tenth preset value, when gas flow is constant, reduce combustion-supporting gas flow until heating furnace stove exit gas in oxygen content be less than or equal to the tenth preset value; Or, when combustion-supporting gas flow is constant, strengthen coal gas flow until heating furnace stove exit gas in oxygen content be less than or equal to the tenth preset value.
Wherein, the 9th preset value and the tenth preset value are comprehensively determined with burning cost by the burning condition of heat storage type combustion and pulse-combustion, and the tenth preset value is greater than the 9th preset value.
Step S160: preheating is carried out to oxygen-enriched combustion-supporting gas and coal gas by the stove exit gas of heating furnace.
Repeat above-mentioned step S110-step S160, just can ensure that heater for rolling steel continuous circulation heats.It should be noted that, the embodiment of the present invention does not make concrete restriction to the sequencing between above-mentioned step S120 and step S130, concrete restriction is not made to the sequencing between step S140 and step S150, as long as ensure that step S140 and step S150 is after step S120 and step S130 yet.
See Fig. 2, the heating system based on heater for rolling steel that the embodiment of the present invention provides, comprising: combustion-supporting gas memory device 49, coal gas memory device 50, air separation plant 3, First Heat Exchanger 4, second heat exchanger 8, oxygen enrichment burner, heating furnace 5 and impulse burner; Oxygen enrichment burner is arranged on the soaking zone of heating furnace 5; Impulse burner is arranged on the bringing-up section of heating furnace 5; First output of combustion-supporting gas memory device 49 is connected with the input of air separation plant 3; The output of air separation plant 3 is connected with the first input end of First Heat Exchanger 4; First output of First Heat Exchanger 4 is connected with the input of oxygen enrichment burner; Second output of combustion-supporting gas memory device 49 is connected with the input of impulse burner; The output of coal gas memory device 50 is connected with the first input end of the second heat exchanger 8; First output of the second heat exchanger 8 is connected with the input of oxygen enrichment burner, impulse burner; The stove exit gas of heating furnace 5 is discharged by First Heat Exchanger 4 and the second heat exchanger 8.
The structure of the heating system based on heater for rolling steel that the embodiment of the present invention provides is further detailed, also comprise: first flow control valve 11, second adjustable valve 6, 3rd flow control valve 13, 4th flow control valve 39, 5th flow control valve 12, 6th flow control valve 29, 7th flow control valve 14, 8th flow control valve 30, first reversal valve 9, second reversal valve 40, 3rd reversal valve 10, 4th reversal valve 41, 9th flow control valve 16, tenth flow control valve 31, 11 flow control valve 20, 12 flow control valve 35, 13 flow control valve 18, 14 flow control valve 33, 15 flow control valve the 22 and the 16 flow control valve 37, oxygen enrichment burner comprises: the first oxygen enrichment burner 23, second oxygen enrichment burner 46, the 3rd oxygen enrichment burner 47 and the 4th oxygen enrichment burner 48, impulse burner comprises: the first impulse burner 25, second impulse burner 27, the 3rd impulse burner 26 and the 4th impulse burner 28, heating furnace 5 includes soaking zone, two bringing-up sections, a bringing-up section and preheating section, first oxygen enrichment burner 23, second oxygen enrichment burner 46, the 3rd oxygen enrichment burner 47 and the 4th oxygen enrichment burner 48 are all arranged on the soaking zone of heating furnace 5, first impulse burner 25 and the second impulse burner 27 are arranged on two bringing-up sections of heating furnace 5, 3rd impulse burner 26 and the 4th impulse burner 28 are arranged on a bringing-up section of heating furnace 5, first output of First Heat Exchanger 4 is connected with the input of the first oxygen enrichment burner 23 by first flow control valve 11, first output of First Heat Exchanger 4 is connected with the input of the second oxygen enrichment burner 46 by second adjustable valve 6, first output of First Heat Exchanger 4 is connected with the input of the 3rd oxygen enrichment burner 47 by the 3rd flow control valve 13, and the first output of First Heat Exchanger 4 is connected with the input of the 4th oxygen enrichment burner 48 by the 4th flow control valve 39, first output of the second heat exchanger 8 is connected with the input of the first oxygen enrichment burner 23 by the 5th flow control valve 12, first output of the second heat exchanger 8 is connected with the input of the second oxygen enrichment burner 46 by the 6th flow control valve 29, first output of the second heat exchanger 8 is connected with the input of the 3rd oxygen enrichment burner 47 by the 7th flow control valve 14, and the first output of the second heat exchanger 8 is connected with the input of the 4th oxygen enrichment burner 48 by the 8th flow control valve 30.Second output of combustion-supporting gas memory device 49 is connected with the 9th flow control valve 16 by the first reversal valve 9, 9th flow control valve 16 is connected with the input of the first impulse burner 25, second output of combustion-supporting gas memory device 49 is connected with the tenth flow control valve 31 by the second reversal valve 40, tenth flow control valve 31 is connected with the input of the second impulse burner 27, second output of combustion-supporting gas memory device 49 is connected with the 11 flow control valve 20 by the 3rd reversal valve 10, 11 flow control valve 20 is connected with the input of the 3rd impulse burner 26, second output of combustion-supporting gas memory device 49 is connected with the 12 flow control valve 35 by the 4th reversal valve 41, 12 flow control valve 35 is connected with the input of the 4th impulse burner 28, first output of the second heat exchanger 8 is connected with the 13 flow control valve 18, 13 flow control valve 18 is connected with the input of the first impulse burner 25, and the first output of the second heat exchanger 8 is connected with the 14 flow control valve 33, and the 14 flow control valve 33 is connected with the input of the second impulse burner 27, first output of the second heat exchanger 8 is connected with the 15 flow control valve 22, and the 15 flow control valve 22 is connected with the input of the 3rd impulse burner 26, first output of the second heat exchanger 8 is connected with the 16 flow control valve 37, and the 16 flow control valve 37 is connected with the input of the 4th impulse burner 28.The stove exit gas output of heating furnace 5 is connected with the second input of First Heat Exchanger 4, and the second output of First Heat Exchanger 4 is connected with the second input of the second heat exchanger 8.In the present embodiment, also comprise: air blast 1, air-introduced machine 7 and air valve 2; The output of combustion-supporting gas memory device 49 is connected with the input of air blast 1, and the first output of air blast 1 is connected with the input of air separation plant 3; Air valve 2 is arranged between the first output of air blast 1 and the input of air separation plant 3; Second output of air blast 1 is connected with the first reversal valve 9, second reversal valve 40, the 3rd reversal valve 10 and the 4th reversal valve 41; Second output of the second heat exchanger 8 is connected with the input of air-introduced machine 7; In the present embodiment, combustion-supporting gas is combustion air; First Heat Exchanger 4 is air heat exchanger; Second heat exchanger 8 is gas change heater.
In order to ensure furnace temperature and the even flow field of the different section of heating furnace 5, the embodiment of the present invention also comprises: partition wall 24; Partition wall 24 is arranged between the soaking zone of heating furnace 5 and two bringing-up sections.
Be described further the structure of the oxygen enrichment burner in the embodiment of the present invention, see Fig. 3, in the present embodiment, the output of oxygen enrichment burner comprises: excircle 42 and inner periphery 44; Excircle 42 and inner periphery 44 all offer spout; First flow control valve 11, the 3rd flow control valve 13, second adjustable valve 6 are all connected with the spout on excircle 42 with the 4th flow control valve 39, therefore the spout on excircle 42 is oxygen-enriched combustion-supporting gas spout 43; 5th flow control valve 12, the 7th flow control valve 14, the 6th flow control valve 29 are all connected with the spout on inner periphery 44 with the 8th flow control valve 30, therefore the spout on inner periphery 44 is gas port 45; In order to ensure that oxygen-enriched combustion-supporting gas and coal gas can be evenly distributed, on the excircle 42 that oxygen-enriched combustion-supporting gas spout 43 and gas port 45 are equidistantly evenly opened in oxygen enrichment burner output separately respectively and inner periphery 44.In the present embodiment, the number of gas port 45 is 6; The number of oxygen-enriched combustion-supporting gas spout 43 is 12; And the coefficient of excess air of the first oxygen enrichment burner 23, second oxygen enrichment burner 46, the 3rd oxygen enrichment burner 47 and the 4th oxygen enrichment burner 48 is 0.85 ~ 0.95.
In order to ensure the heat transfer effect of pulse-combustion, and realize the heat-accumulation combustion function of impulse burner, the embodiment of the present invention also comprises: heat accumulating element; Heat accumulating element is arranged in impulse burner.In the present embodiment, heat accumulating element can comprise: ceramic bead or ceramic honeycomb body etc.
Further description is carried out to the structure of the heating system based on heater for rolling steel that the embodiment of the present invention provides, also comprises: the first stop valve 15, second stop valve 32, the 3rd stop valve 17, the 4th stop valve 34, the 5th stop valve 19, the 6th stop valve 36, the 7th stop valve 21 and the 8th stop valve 38; First stop valve 15 and the 9th flow control valve 16 are arranged in series between the first reversal valve 9 and the first impulse burner 25; Second stop valve 32 and the tenth flow control valve 31 are arranged in series between the second reversal valve 40 and the second impulse burner 27; 3rd stop valve the 17 and the 13 flow control valve 18 is arranged in series between the second heat exchanger 8 and the first impulse burner 25; 4th stop valve the 34 and the 14 flow control valve 33 is arranged in series between the second heat exchanger 8 and the second impulse burner 27; 5th stop valve the 19 and the 11 flow control valve 20 is arranged in series between the 3rd reversal valve 10 and the 3rd impulse burner 26; 6th stop valve the 36 and the 12 flow control valve 35 is arranged in series between the 4th reversal valve 41 and the 4th impulse burner 28; 7th stop valve the 21 and the 15 flow control valve 22 is arranged in series between the second heat exchanger 8 and the 3rd impulse burner 26; 8th stop valve the 38 and the 16 flow control valve 37 is arranged in series between the second heat exchanger 8 and the 4th impulse burner 28.
It should be noted that, in order to realize coal gas accumulation of heat and high temperature preheating, first coal gas reversal valve can also be arranged between the first output of the second heat exchanger 8 and the 3rd stop valve the 17, the 13 flow control valve 18, and the first coal gas heat accumulating element is set at the coal gas output of the first impulse burner 25; Second coal gas reversal valve is arranged between the first output of the second heat exchanger 8 and the 4th stop valve the 34, the 14 flow control valve 33, and the second coal gas heat accumulating element is set at the coal gas output of the second impulse burner 27; 3rd coal gas reversal valve is arranged between the first output of the second heat exchanger 8 and the 7th stop valve the 21, the 15 flow control valve 22, and the 3rd coal gas heat accumulating element is set at the coal gas output of the 3rd impulse burner 26; 4th coal gas reversal valve is arranged between the first output of the second heat exchanger 8 and the 8th stop valve the 38, the 16 flow control valve 37, and the 4th coal gas heat accumulating element is set at the coal gas output of the 4th impulse burner 28.
The heating system based on heater for rolling steel provided when the embodiment of the present invention operationally, combustion air from air blast 1 divides two strands, after one stock-traders' know-how air separation plant 3 remove portion nitrogen, become the oxygen-enriched combustion-supporting air that oxygen content volume ratio is 24% ~ 26%, through First Heat Exchanger 4 preheating to be temperature the be oxygen-enriched combustion-supporting air of 200 ~ 400 DEG C, and arrive the first oxygen enrichment burner 23, second oxygen enrichment burner 46, the 3rd oxygen enrichment burner 47 and the 4th oxygen enrichment burner 48; Coal gas in coal gas memory device 50 is temperature through the second heat exchanger 8 preheating is 150 ~ 250 DEG C, 6000 ~ 12000kJ/m of calorific value 3coal gas, and arrive the first oxygen enrichment burner 23, second oxygen enrichment burner 46, the 3rd oxygen enrichment burner 47 and the 4th oxygen enrichment burner 48, and carry out oxygen-enriched combusting with the soaking zone that the oxygen-enriched combustion-supporting air through preheating is mixed into heating furnace 5.Another strand of combustion air arrives the first impulse burner 25 and the second impulse burner 27 of two bringing-up sections through the first reversal valve 9 and the second reversal valve 40, and arrive the 3rd impulse burner 26 and the 4th impulse burner 28 of a bringing-up section through the 3rd reversal valve 10 and the 4th reversal valve 41, and be the high temperature combustion air of 900 ~ 1100 DEG C by the first impulse burner 25, second impulse burner 27, the 3rd impulse burner 26 and the 4th impulse burner 28 preheating; The coal gas exported by the second heat exchanger 8 also arrives the first impulse burner 25 and the second impulse burner 27 of two bringing-up sections through the first reversal valve 9 and the second reversal valve 40, and arrive the 3rd impulse burner 26 and the 4th impulse burner 28 of a bringing-up section through the 3rd reversal valve 10 and the 4th reversal valve 41, and carry out pulse-combustion with the bringing-up section that the high temperature combustion air through preheating is mixed into heating furnace 5.The main combustion period of impulse burner and smoke evacuation phase, alternately, in the main combustion period of impulse burner, coefficient of excess air was 1.1 ~ 1.3.In the first combustion period of pulse-combustion, first stop valve 15, the 9th flow control valve the 16, the 12 flow control valve 35, the 6th stop valve 36 are in opening, first reversal valve 9 and the 4th reversal valve 41 are in not commutation states, namely gas can be flowed to heating furnace 5 by heat exchanger, and the first impulse burner 25 and the 4th impulse burner 28 are in fired state; 5th stop valve the 19, the 11 flow control valve 20, the tenth flow control valve 31, second stop valve 32 are in opening, 7th stop valve 21 and the 4th stop valve 34 are in closure state, second reversal valve 40 and the 3rd reversal valve 10 are in commutation states, namely gas can be flowed to heat exchanger by heating furnace 5, and the second impulse burner 27 and the 3rd impulse burner 26 are in smoke evacuation state.One high-temperature flue gas arrives First Heat Exchanger 4 through the second impulse burner 27 and the second reversal valve 40, and to be temperature be that the low-temperature flue gas of 120 ~ 200 DEG C is discharged through air-introduced machine 7 again through First Heat Exchanger 4 and the second heat exchanger 8 heat exchange; Another strand of high-temperature flue gas also arrives First Heat Exchanger 4 through the 3rd impulse burner 26 and the 3rd reversal valve 10, and to be temperature be that the low-temperature flue gas of 120 ~ 200 DEG C is discharged through air-introduced machine 7 again through First Heat Exchanger 4 and the second heat exchanger 8 heat exchange.In the second combustion period of pulse-combustion, 5th stop valve the 19, the 11 flow control valve 20, the tenth flow control valve 31, second stop valve 32 are in opening, second reversal valve 40 and the 3rd reversal valve 10 are in not commutation states, namely gas can be flowed to heating furnace 5 by heat exchanger, and the second impulse burner 27 and the 3rd impulse burner 26 are in fired state.First stop valve 15, the 9th flow control valve the 16, the 12 flow control valve 35, the 6th stop valve 36 are in opening, 3rd stop valve 17 and the 8th stop valve 38 are in closure state, first reversal valve 9 and the 4th reversal valve 41 are in commutation states, namely gas can be flowed to heat exchanger by heating furnace 5, and the first impulse burner 25 and the 4th impulse burner 28 are in smoke evacuation state; One high-temperature flue gas arrives First Heat Exchanger 4 through the first impulse burner 25 and the first reversal valve 9, and to be temperature be that the low-temperature flue gas of 120 ~ 200 DEG C is discharged through air-introduced machine 7 again through First Heat Exchanger 4 and the second heat exchanger 8 heat exchange; Another strand of high-temperature flue gas also arrives First Heat Exchanger 4 through the 4th impulse burner 28 and the 4th reversal valve 41, and to be temperature be that the low-temperature flue gas of 120 ~ 200 DEG C is discharged through air-introduced machine 7 again through First Heat Exchanger 4 and the second heat exchanger 8 heat exchange.It can thus be appreciated that, the reversing combustion of the first impulse burner 25 is controlled by the first reversal valve 9, the reversing combustion of the second impulse burner 27 is controlled by the second reversal valve 40, the reversing combustion of the 3rd impulse burner 26 is controlled by the 3rd reversal valve 10, and the reversing combustion of the 4th impulse burner 28 is controlled by the 4th reversal valve 41.In addition, the exhaust temperature of the stove exit gas of heating furnace 5 is 700 ~ 900 DEG C, after First Heat Exchanger 4 and the second heat exchanger 8 heat exchange, become the low-temperature flue gas that temperature is 120 ~ 200 DEG C, and in flue gas, the volume ratio of residual oxygen is 3 ~ 5%, and is discharged by air-introduced machine 7.In order to the impulse burner of the paired setting making employing regenerative combustion technology commutate simultaneously, Synchronization Control, thus furnace gas fast reciprocating is flowed, and then reaches the object of efficient heat transfer.In the present embodiment, the combustion period of impulse burner is identical with the smoke evacuation cycle, and is 1 ~ 3min.
This system is when lighting a fire, and the oxygen enrichment burner of heater for rolling steel 5 soaking zone can be utilized to light a fire, and after furnace temperature is more than 600 DEG C, the impulse burner starting two bringing-up sections and a bringing-up section carries out reversing combustion, thus achieves the Fast Heating of steel billet.When blowing out of lowering the temperature makes furnace temperature be reduced to 600 DEG C, close the impulse burner of two bringing-up sections and a bringing-up section, stop reversing combustion, finally stop to burn oxygen enrichment burner.
The implementation case partial design parameter is as shown in table 1:
As shown in table 1, the steel billet tapping temperature of the embodiment of the present invention is 1180 ~ 1220 DEG C, the oxygen enrichment percentage of the oxygen enrichment burner of the soaking zone of the heater for rolling steel 5 arranged is 3% ~ 5%, the furnace temperature of the soaking zone arranged is 1200 ~ 1240 DEG C, the furnace temperature of two bringing-up sections is 1200 ~ 1250 DEG C, the furnace temperature of one bringing-up section is 1100 ~ 1200 DEG C, the furnace temperature of preheating section is 800 ~ 1000 DEG C, and final exhaust gas temperature is 120 ~ 200 DEG C, Discrete control regulates the soaking zone of heater for rolling steel 5, the coefficient of excess air of two bringing-up sections and a bringing-up section, gas preheating temperature and combustion air preheat temperature.
The combustion control processes of the embodiment of the present invention is specific as follows:
Soaking zone Combustion Process Control: first adjust gas flow and oxygen-enriched combustion-supporting air mass flow by oxygen enrichment percentage and coefficient of excess air, then revise gas flow and oxygen-enriched combustion-supporting air mass flow further by the residual oxygen of flue gas after burning.Wherein, in combustion air, Rich Oxygen Amount volume ratio is 24% ~ 26%, and the control range of coefficient of excess air is 0.85 ~ 0.95.
Two bringing-up sections and a bringing-up section Combustion Process Control: first judge whether impulse burner burns; Particularly, if impulse burner is in not commutation states, then judge that this impulse burner is fired state; If impulse burner is in commutation states, then judge that this impulse burner is in smoke evacuation state; To the impulse burner of fired state be in by coefficient of excess air adjustment gas flow and combustion air flow, and by the residual oxygen of flue gas after burning, feedback regulation be carried out to gas flow and oxygen-enriched combustion-supporting air mass flow.Wherein, the control range of coefficient of excess air is 1.1 ~ 1.3, and the residual oxygen volume ratio of flue gas controls to be 3% ~ 5%.
Here it should be noted that, in embodiments of the present invention, the adjustment of the flow to coal gas and combustion air can be realized by the aperture controlling each flow control valve.In order to improve the automaticity of the embodiment of the present invention, to reduce the labour intensity of staff, the signal input part signal of the signal output part of Programmable Logic Controller with each device (as air blast 1, air separation plant 3, heat exchanger, heating furnace 5, flow control valve, air-introduced machine 7, oxygen enrichment burner, impulse burner etc.) can be connected, thus realize Automated condtrol.
The heating means based on heater for rolling steel that the embodiment of the present invention provides and system, tool has the following advantages:
(1) shorten the heating steel billet time, realize it and heat quickly and efficiently
Because the embodiment of the present invention make use of oxygen-enriched combustion technology and pulse combustion technology, thus the uniformity of ignition temperature and furnace temperature is not only increased, but also convection current and radiant heat transfer in efficient hardening stove, the fluctuation of the furnace temperature furnace pressure simultaneously also reduced, effectively shorten the heat time of steel billet, achieve the rapidly and efficiently heating of heating furnace 5.
(2) reduce heat loss due to exhaust gas, improve furnace temperature
In the present embodiment, because the soaking zone at heater for rolling steel 5 carries out oxygen-enriched combusting, thus decrease the demand of combustion air, thus decrease smoke growing amount, and then decrease the heat loss of smoke evacuation, effectively improve furnace temperature.
(3) fully reclaim and utilize fume afterheat, reducing unit consumption, improve the efficiency of heating surface
Because the embodiment of the present invention make use of stove tail high-temperature flue gas classification preheating oxygen-enriched combustion-supporting air and the coal gas of heating furnace 5, and extract two bringing-up sections of heating furnace 5 and high-temperature flue gas preheating oxygen-enriched combustion-supporting air to 900 ~ 1100 DEG C of a bringing-up section, and the temperature heat exchange of finally discharging fume is reduced to 120 ~ 200 DEG C, thus the embodiment of the present invention reclaims fully and make use of the waste heat of high-temperature flue gas, achieve high efficiente callback and the utilization of steel rolling waste heat, thus reduce the unit consumption of heater for rolling steel 5, effectively improve the efficiency of heating surface.
(4) environmental protection
In embodiments of the present invention, owing to being removed by the nitrogen in combustion-supporting gas by air separation plant 3, NO is decreased 2, the pernicious gas such as NO discharge, thus the embodiment of the present invention also has the advantage of environmental protection.
(5) the optimum organization application of multiple energy saving technology is achieved
The embodiment of the present invention applies the multiple energy saving technologies such as oxygen-enriched combusting, pulse-combustion and heat storage type combustion, and by these power-saving technology optimum organization, has given full play to the advantage of each power-saving technology, effectively achieves the energy-saving and cost-reducing of heater for rolling steel 5.
The heating means based on heater for rolling steel that the embodiment of the present invention provides and system, by oxygen-enriched combustion technology, pulse combustion technology and regenerative combustion technology combine, at the soaking zone of heater for rolling steel 5, oxygen enrichment burner is installed, at two bringing-up sections and the bringing-up section installation impulse burner of heater for rolling steel 5, utilize fume afterheat classification preheating gas and oxygen-enriched combustion-supporting air, and by parameters such as coefficient of excess air and the residual oxygen of flue gas, heater for rolling steel 5 soaking zone is optimized in further adjustment, the coal gas of two bringing-up sections and a bringing-up section and the flow of combustion air, to realize oxygen-enriched combustion technology and the coupling application of regenerative combustion technology on heater for rolling steel 5, effective recovery and make use of high-temperature flue gas waste heat, decrease heat loss due to exhaust gas, improve the furnace temperature of heater for rolling steel 5 and the uniformity of furnace temperature, reduce the stove unit consumption of steel rolling heating, improve heating intensity and the efficiency of heating surface of heater for rolling steel 5, and shorten the heat time of steel billet at stove, achieve the rapidly and efficiently heating of steel billet.In addition, the embodiment of the present invention also has the advantage of environmental protection.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (10)

1. based on heating means for heater for rolling steel, it is characterized in that, comprising:
By a part of combustion-supporting gas denitrogenation, generate oxygen-enriched combustion-supporting gas;
Preheating is carried out to described oxygen-enriched combustion-supporting gas;
Preheating is carried out to coal gas;
Oxygen-enriched combustion-supporting gas after preheating is mixed with the coal gas after a part of preheating the soaking zone passing into heating furnace and carries out oxygen-enriched combusting;
Described for part combustion-supporting gas is mixed with the coal gas after a part of preheating the bringing-up section passing into described heating furnace and carries out pulse-combustion;
By the stove exit gas of described heating furnace, preheating is carried out to oxygen-enriched combustion-supporting gas and coal gas.
2., as claimed in claim 1 based on the heating means of heater for rolling steel, it is characterized in that, also comprise:
Oxygen enrichment percentage during detection oxygen-enriched combusting and coefficient of excess air, according to described oxygen enrichment percentage and described coefficient of excess air, the flow to described oxygen-enriched combustion-supporting gas and described coal gas regulates;
Detect coefficient of excess air during pulse-combustion, regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas.
3., as claimed in claim 2 based on the heating means of heater for rolling steel, it is characterized in that, described according to described oxygen enrichment percentage and described coefficient of excess air, the flow to described oxygen-enriched combustion-supporting gas and described coal gas regulates, and comprising:
When described oxygen enrichment percentage is greater than the first preset value or described coefficient of excess air is less than the second preset value, then reduces the flow of described oxygen-enriched combustion-supporting gas or strengthen the flow of described coal gas;
When described oxygen enrichment percentage is less than the 3rd preset value or described coefficient of excess air is greater than the 4th preset value, then strengthens the flow of described oxygen-enriched combustion-supporting gas or reduce the flow of described coal gas;
Wherein, described first preset value is greater than described 3rd preset value, and described 4th preset value is greater than described second preset value.
4. as claimed in claim 2 based on the heating means of heater for rolling steel, it is characterized in that, also comprise: the oxygen content in the stove exit gas of heating furnace when detecting described oxygen-enriched combusting, described to regulate according to described oxygen enrichment percentage and the described coefficient of excess air flow to described oxygen-enriched combustion-supporting gas and described coal gas after, regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described oxygen-enriched combustion-supporting gas and described coal gas.
5. as claimed in claim 4 based on the heating means of heater for rolling steel, it is characterized in that, describedly to regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described oxygen-enriched combustion-supporting gas and described coal gas, comprising:
When oxygen content in the stove exit gas of described heating furnace is less than the 5th preset value, when described gas flow is constant, strengthen the flow of described oxygen-enriched combustion-supporting gas; Or, when described oxygen-enriched combustion-supporting gas flow is constant, reduce the flow of described coal gas;
When oxygen content in the stove exit gas of described heating furnace is greater than the 6th preset value, when described gas flow is constant, reduce the flow of described oxygen-enriched combustion-supporting gas; Or, when described oxygen-enriched combustion-supporting gas flow is constant, strengthen the flow of described coal gas;
Wherein, described 6th preset value is greater than described 5th preset value.
6. as claimed in claim 2 based on the heating means of heater for rolling steel, it is characterized in that, describedly to regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas, comprising:
When described coefficient of excess air is greater than the 7th preset value, strengthens the flow of described combustion-supporting gas or reduce the flow of described coal gas;
When described coefficient of excess air is less than the 8th preset value, reduces the flow of described combustion-supporting gas or strengthen the flow of described coal gas;
Wherein, described 7th preset value is greater than described 8th preset value.
7. as claimed in claim 2 based on the heating means of heater for rolling steel, it is characterized in that, also comprise: the oxygen content in the stove exit gas of heating furnace when detecting described pulse-combustion, described to regulate according to the flow of described coefficient of excess air to described combustion-supporting gas and described coal gas after, regulate according to the flow of the oxygen content in the stove exit gas of described heating furnace to described combustion-supporting gas and described coal gas; Be specially:
When oxygen content in the stove exit gas of described heating furnace is less than the 9th preset value, when described gas flow is constant, strengthen the flow of described combustion-supporting gas; Or, when described combustion-supporting gas flow is constant, reduce the flow of described coal gas;
When oxygen content in the stove exit gas of described heating furnace is greater than the tenth preset value, when described gas flow is constant, reduce the flow of described combustion-supporting gas; Or, when described combustion-supporting gas flow is constant, strengthen the flow of described coal gas;
Wherein, described tenth preset value is greater than described 9th preset value.
8. based on a heating system for heater for rolling steel, it is characterized in that, comprising: combustion-supporting gas memory device, coal gas memory device, air separation plant, First Heat Exchanger, the second heat exchanger, oxygen enrichment burner, heating furnace and impulse burner; Described oxygen enrichment burner is arranged on the soaking zone of described heating furnace; Described impulse burner is arranged on the bringing-up section of described heating furnace; First output of described combustion-supporting gas memory device is connected with the input of described air separation plant; The output of described air separation plant is connected with the first input end of described First Heat Exchanger; First output of described First Heat Exchanger is connected with the input of described oxygen enrichment burner; Second output of described combustion-supporting gas memory device is connected with the input of described impulse burner; The output of described coal gas memory device is connected with the first input end of described second heat exchanger; First output of described second heat exchanger is connected with the input of described oxygen enrichment burner, described impulse burner; The stove exit gas of described heating furnace is discharged by described First Heat Exchanger and described second heat exchanger.
9. as claimed in claim 8 based on the heating system of heater for rolling steel, it is characterized in that, also comprise: first flow control valve, second adjustable valve, the 3rd flow control valve, the 4th flow control valve, the 5th flow control valve, the 6th flow control valve, the 7th flow control valve and the 8th flow control valve; Described oxygen enrichment burner comprises: the first oxygen enrichment burner, the second oxygen enrichment burner, the 3rd oxygen enrichment burner and the 4th oxygen enrichment burner; First output of described First Heat Exchanger is connected with the input of described first oxygen enrichment burner by described first flow control valve, first output of described First Heat Exchanger is connected with the input of described second oxygen enrichment burner by described second adjustable valve, first output of described First Heat Exchanger is connected with the input of described 3rd oxygen enrichment burner by described 3rd flow control valve, and the first output of described First Heat Exchanger is connected with the input of described 4th oxygen enrichment burner by described 4th flow control valve; First output of described second heat exchanger is connected with the input of described first oxygen enrichment burner by described 5th flow control valve, first output of described second heat exchanger is connected with the input of described second oxygen enrichment burner by described 6th flow control valve, first output of described second heat exchanger is connected with the input of described 3rd oxygen enrichment burner by described 7th flow control valve, and the first output of described second heat exchanger is connected with the input of described 4th oxygen enrichment burner by described 8th flow control valve.
10. as claimed in claim 8 or 9 based on the heating system of heater for rolling steel, it is characterized in that, also comprise: the first reversal valve, the second reversal valve, the 3rd reversal valve, the 4th reversal valve, the 9th flow control valve, the tenth flow control valve, the 11 flow control valve, the 12 flow control valve, the 13 flow control valve, the 14 flow control valve, the 15 flow control valve and the 16 flow control valve, described impulse burner comprises: the first impulse burner, the second impulse burner, the 3rd impulse burner and the 4th impulse burner, second output of described combustion-supporting gas memory device is connected with described 9th flow control valve by described first reversal valve, described 9th flow control valve is connected with the input of described first impulse burner, second output of described combustion-supporting gas memory device is connected with described tenth flow control valve by described second reversal valve, described tenth flow control valve is connected with the input of described second impulse burner, second output of described combustion-supporting gas memory device is connected with described 11 flow control valve by described 3rd reversal valve, described 11 flow control valve is connected with the input of described 3rd impulse burner, second output of described combustion-supporting gas memory device is connected with described 12 flow control valve by described 4th reversal valve, described 12 flow control valve is connected with the input of described 4th impulse burner, first output of described second heat exchanger is connected with described 13 flow control valve, described 13 flow control valve is connected with the input of described first impulse burner, and the first output of described second heat exchanger is connected with described 14 flow control valve, and described 14 flow control valve is connected with the input of described second impulse burner, first output of described second heat exchanger is connected with described 15 flow control valve, and described 15 flow control valve is connected with the input of described 3rd impulse burner, first output of described second heat exchanger is connected with described 16 flow control valve, and described 16 flow control valve is connected with the input of described 4th impulse burner.
CN201510158776.0A 2015-04-03 2015-04-03 Heating method and system based on steel rolling heating furnace Pending CN104748568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510158776.0A CN104748568A (en) 2015-04-03 2015-04-03 Heating method and system based on steel rolling heating furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510158776.0A CN104748568A (en) 2015-04-03 2015-04-03 Heating method and system based on steel rolling heating furnace

Publications (1)

Publication Number Publication Date
CN104748568A true CN104748568A (en) 2015-07-01

Family

ID=53588625

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510158776.0A Pending CN104748568A (en) 2015-04-03 2015-04-03 Heating method and system based on steel rolling heating furnace

Country Status (1)

Country Link
CN (1) CN104748568A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930541A (en) * 2015-05-27 2015-09-23 台嘉玻璃纤维有限公司 Tank furnace dissolution burner control method
CN105241262A (en) * 2015-11-03 2016-01-13 中冶东方工程技术有限公司 Pure oxygen combustion and carbon dioxide capturing system and process of heating furnace
CN110793032A (en) * 2019-09-30 2020-02-14 鞍钢股份有限公司 Oxygen-enriched combustion system of heating furnace and control method thereof
CN110998185A (en) * 2017-08-30 2020-04-10 大阳日酸株式会社 Burner and heating method using same
CN111964467A (en) * 2020-08-04 2020-11-20 鞍钢股份有限公司 Oxygen-enriched combustion system and method for combining premixed oxygen enrichment and oxygen injection of steel rolling heating furnace

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0978123A (en) * 1995-09-07 1997-03-25 Nkk Corp Heating furnace, heat-storage type combustion device and combustion method
JP2003329240A (en) * 2002-05-07 2003-11-19 Osaka Gas Co Ltd Heating furnace
CN102242249A (en) * 2011-06-30 2011-11-16 首钢总公司 Heating device for improving heating quality of steel billets and using method thereof
CN202063973U (en) * 2011-05-11 2011-12-07 南通宝钢钢铁有限公司 Oxygen enrichment system of heating furnace for steel rolling
JP2013122323A (en) * 2011-12-09 2013-06-20 Chugai Ro Co Ltd Heat utilization method at furnace, and burning facility utilizing the method
CN103343965A (en) * 2013-07-12 2013-10-09 中冶南方(武汉)威仕工业炉有限公司 Heating furnace system with oxygen-enriched combustion
CN203307386U (en) * 2013-05-08 2013-11-27 石家庄新华能源环保科技股份有限公司 Air-gas dual regenerative heating furnace
CN103776051A (en) * 2014-02-13 2014-05-07 湖北三恒电气设备有限公司 Gas combustion control method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0978123A (en) * 1995-09-07 1997-03-25 Nkk Corp Heating furnace, heat-storage type combustion device and combustion method
JP2003329240A (en) * 2002-05-07 2003-11-19 Osaka Gas Co Ltd Heating furnace
CN202063973U (en) * 2011-05-11 2011-12-07 南通宝钢钢铁有限公司 Oxygen enrichment system of heating furnace for steel rolling
CN102242249A (en) * 2011-06-30 2011-11-16 首钢总公司 Heating device for improving heating quality of steel billets and using method thereof
JP2013122323A (en) * 2011-12-09 2013-06-20 Chugai Ro Co Ltd Heat utilization method at furnace, and burning facility utilizing the method
CN203307386U (en) * 2013-05-08 2013-11-27 石家庄新华能源环保科技股份有限公司 Air-gas dual regenerative heating furnace
CN103343965A (en) * 2013-07-12 2013-10-09 中冶南方(武汉)威仕工业炉有限公司 Heating furnace system with oxygen-enriched combustion
CN103776051A (en) * 2014-02-13 2014-05-07 湖北三恒电气设备有限公司 Gas combustion control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张雄等: "富氧燃烧纯高炉煤气在冶金工业炉上的应用分析", 《冶金能源》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930541A (en) * 2015-05-27 2015-09-23 台嘉玻璃纤维有限公司 Tank furnace dissolution burner control method
CN105241262A (en) * 2015-11-03 2016-01-13 中冶东方工程技术有限公司 Pure oxygen combustion and carbon dioxide capturing system and process of heating furnace
CN110998185A (en) * 2017-08-30 2020-04-10 大阳日酸株式会社 Burner and heating method using same
CN110793032A (en) * 2019-09-30 2020-02-14 鞍钢股份有限公司 Oxygen-enriched combustion system of heating furnace and control method thereof
CN110793032B (en) * 2019-09-30 2021-08-20 鞍钢股份有限公司 Oxygen-enriched combustion system of heating furnace and control method thereof
CN111964467A (en) * 2020-08-04 2020-11-20 鞍钢股份有限公司 Oxygen-enriched combustion system and method for combining premixed oxygen enrichment and oxygen injection of steel rolling heating furnace

Similar Documents

Publication Publication Date Title
CN104748568A (en) Heating method and system based on steel rolling heating furnace
WO2015043296A1 (en) Progressive-switching regenerative combustion apparatus and control method therefor
CN202660889U (en) Liquid deslagging high-temperature oriented silicon steel walking beam type slab heating furnace
CN204648216U (en) A kind of Problem of Biomass Fuel Gas Combustion installment with UTILIZATION OF VESIDUAL HEAT IN
CN204535377U (en) A kind of baked brick tunnel kiln cooling system
CN102607267A (en) Regenerative high-temperature air combustion energy-saving environment-friendly shuttle-type kiln
CN103673592B (en) The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air
CN103727784B (en) A kind of energy saving of system method of domestic ceramics oxygen-enriched combusting shuttle kiln
CN204943454U (en) The flue gas waste heat recovery of natural gas oxygen-enriched combustion furnace and recirculation thermoregulating system
CN204461072U (en) A kind of energy-efficient aluminium bar Hybrid Heating stove
CN106190184A (en) A kind of coke oven heating method and device reducing NOx generation
CN109055713A (en) A kind of double-regenerative heating furnace board briquette and method for controlling furnace temperature
CN101839473A (en) Flue gas recirculation high temperature air energy-saving and environmental protection combustion technology
CN107490296A (en) A kind of method and device that hot wind ignition is carried out using high-temperature waste flue gas
CN206073077U (en) The low NOx flat flames heat-accumulating burner of grading combustion technology
CN204294474U (en) A kind of color coating incinerator heating system
CN102829643B (en) Implementation method of carbon roaster control system with combustion assistance function
CN105271842A (en) Method for calcining active lime by use of mixed gas in lime sleeve kiln
CN205979793U (en) Continuous heat accumulation burner of intelligent
RU2735123C2 (en) Method of batch furnace operation, including preliminary heating of fluid medium upstream of furnace
CN101846447A (en) Down draft kiln
CN202201922U (en) Digital pulse type thermal treatment furnace
CN206425543U (en) A kind of big bag roaster
CN205979792U (en) Continuous heat accumulation burner
CN204438754U (en) Rotary kiln Secondary Air oxygen enrichment pulse-combustion air jet system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20150701