CN108265153A - Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method - Google Patents
Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method Download PDFInfo
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- CN108265153A CN108265153A CN201611254529.1A CN201611254529A CN108265153A CN 108265153 A CN108265153 A CN 108265153A CN 201611254529 A CN201611254529 A CN 201611254529A CN 108265153 A CN108265153 A CN 108265153A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/02—Treatment of the exhaust gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/06—Energy from waste gas used in other processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method of the present invention belong to pneumatic steelmaking LT method coal-gas recovering technologies, wind turbine variable speed energy conservation technology, purpose is according to the characteristics of LT methods RECOVERY OF CONVERTER GAS and wind turbine variable-speed operation, the control method that research and development are adapted with RECOVERY OF CONVERTER GAS and wind turbine variable speed energy conservation operating mode, to improve Rate of Converter Gas Recovery and realize wind turbine variable speed energy conservation optimal control, main points are that the aperture of fans entrance valve is adjusted according to converter gas amount, the speed of wind turbine is controlled according to micro-differential pressure, by the two organically with reference to obtaining good coal-gas recovering effect and Fan Energy-saving effect, it can be widely applied to create, enlarging or all kinds of LT methods converter dust-removing gas recovery systems of transformation.
Description
Technical field
The invention belongs to pneumatic steelmaking LT method coal-gas recoverings technology, wind turbine variable speed energy conservation technologies.
Background technology
Coal gas of converter is the important secondary energy sources of iron and steel enterprise, and the recycling of coal gas of converter accounts for about the entire converter procedure energy and returns
The 80%~90% of total amount is received, is the negative key link that can make steel and reduce process energy consumption.The calorific value of coal gas of converter is higher, be compared with
It for good fuel, can play an important role in the fuel balance of iron and steel enterprise, RECOVERY OF CONVERTER GAS is the secondary energy in China
One of weak link that source recycles improves RECOVERY OF CONVERTER GAS amount, can not only effectively reduce steel making working procedure production cost, be
It realizes that " negative energy " steel-making lays the first stone, and can greatly reduce steel mill's gross contamination emission, realizes clean manufacturing.
Country's RECOVERY OF CONVERTER GAS level is irregular at present, and the RECOVERY OF CONVERTER GAS level of high-level steel mill has approached
International high-caliber standard, but the RECOVERY OF CONVERTER GAS of most of steel mills is still in reduced levels, wherein have the reason of management, but
Main the reason of should belonging to technical aspect.
By the calorific value of coal gas of converter with 7500kJ/m3On the basis of, country's coal-gas recovering at present it is preferable it is horizontal 90~
110m3Between/t, about 7~800,000,000 tons every year of current converter output of steel if coal-gas recovering level improves 10%, every year may be used
More gas recoveries about 63*108~88*108m3, equivalent standard coal is about 161.4~225.5 ten thousand tons；If by domestic coal-gas recovering
Average level is in 60~80m3It is calculated between/t, it, every year can more gas recoveries about 84*10 if coal-gas recovering is horizontal to improve 20%8
~128*108m3, equivalent standard coal is about 215.2~3,280,000 tons；Energy-saving benefit is considerable, while also to reducing steel mill's pollution
Object total emission volumn is made that notable contribution.
Converter current flue gas ash removal and gas recovery system are broadly divided into three types：Wet method (OG methods Oxygen
Converter Gas Recovery System) dedusting, semidry method dedusting and LT (Lurgi-Thyssen) dry method dust.It is half-dried
Method dedusting is to develop out from wet method (OG methods) dedusting, also belongs to OG method dedustings.The range of this patent discussion is only limitted to LT and does
Method dedusting.
About LT dry method dust control technologies, wind turbine speed change, micro- is adjusted using multistage wind turbine speed Control, differential pressure at present
The control strategies such as differential pressure regulation fans entrance valve opening.
Existing control technology is divided into two classes substantially, when according to process operation state or micro-differential pressure to rotation speed of fan into
Row control, is consistent the exhausting amount of wind turbine and the production quantity of flue gas, avoids flue gas excessive or the interior sucking of converter cover is excessive empty
Gas, it is desirable to control to reach Optimal Control state by the rotating speed of wind turbine；Second is that fans entrance is adjusted by micro-differential pressure
The aperture of valve is consistent the exhausting amount of wind turbine and the production quantity of flue gas, avoids flue gas excessive or the interior sucking of converter cover is excessive
Air, it is desirable to pass through the Optimal Control state being accurately positioned to reach aperture of fans entrance valve.
The problem of existing control technology, is, coal gas is controlled due to relying on rotation speed of fan or relying on fans entrance valve opening
The whole process of recycling, system will necessarily be there are certain defects, for the former, due to the limitation of wind pressure and wind speed, the change of wind turbine
Fast range receives restriction, particularly smelts the later stage, and with the reduction of exhaust gas volumn, wind turbine gearshift adjustment seems helpless, both
Coal-gas recovering quantity is had lost, wastes many Fan Energy-saving spaces, due to control strategy, wind turbine speed Control
Function be not not fully exerted, energy-saving effect is greatly affected；For the latter, since fans entrance valve is intrinsic not
Suitable for adjusting the characteristic of differential pressure on a large scale, make factor of the differential pressure system there are irregular operation, particularly occurring disturbing greatly
In the case of dynamic, not only existing control technology does not have to solve the problems, such as to the adjusting process of fans entrance valve, makes operating condition instead
More deteriorate, existing system is made to be generally difficult to realize Automatic Control.
In conclusion existing control technology do not adapt to fundamentally RECOVERY OF CONVERTER GAS and wind turbine variable speed energy conservation application
Demand, theoretical research and application technology urgently have breakthrough.
It yet there are no and publish about two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method
Publication, document or data.
Invention content
The purpose of the present invention is according to LT methods RECOVERY OF CONVERTER GAS and wind turbine variable speed energy conservation operation the characteristics of, research and development with
The control method that RECOVERY OF CONVERTER GAS and wind turbine variable speed energy conservation operating mode are adapted, to improve Rate of Converter Gas Recovery and realize wind turbine
Variable speed energy conservation optimal control.
The method is characterized in that study existing control technology there are the problem of, break through basis and the frame of existing control technology
Frame, innovatively using two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method, according to converter gas
Amount adjusts the aperture of fans entrance valve, forms fans entrance valve opening control Closed dynamitic system；It is controlled according to micro-differential pressure
The speed of wind turbine forms micro-differential pressure control Closed dynamitic system；By two Closed dynamitic systems organically with reference to obtaining
Obtain good coal-gas recovering effect and Fan Energy-saving effect.
Description of the drawings
1 is coal-gas recovering and blower fan system processing data information and control device in attached drawing, and 2 be converter process main control system
System, 3 be coal-gas recovering and fan speed regulation dynamic controller, and 4 be fans entrance valve drive, and 5 be fans entrance valve, and 6 be wind
Machine inlet valve jaw opening sensor, 7 be fan frequency control device, and 8 be fan electromotor, and 9 be wind turbine, and 10 be pressure detector,
11 be technological parameter and status information of equipment, and 12 be coal-gas recovering and wind turbine process system.
Specific embodiment
The LT method coal-gas recovering control modes of the prior art, mainstream is by according to process operation state or micro-differential pressure
To the control mode that rotation speed of fan is adjusted, control object is rotation speed of fan, it is therefore an objective to obtain corresponding changes in flow rate, but wind
When machine rotating speed reduces, the wind pressure and wind speed of pipe network system also accordingly reduce, and gas recovery system and electric dust removing system are to wind pressure
There is certain requirement with wind speed, which limits the range of wind turbine speed change.Wind turbine slewing range, which is limited, to be meaned to return coal gas
Yield and Fan Energy-saving will have adverse effect on, particularly the converter smelting later stage, existing as flue gas occurrence quantity gradually reduces
Technology obviously loses due control action, CO contents is caused to reduce, oxygen content raising so as to smelt the coal-gas recovering in later stage
Process is very short, this is coal-gas recovering rate by serious the main reason for restricting.
Another LT methods coal-gas recovering control mode of the prior art be by differential pressure adjust fans entrance valve opening come
Flow control is carried out, but because of fans entrance valve nonlinear characteristic inherently and the insensitivity to flow-rate adjustment, the result is that
Very limited to the regulating effect of flow by differential pressure, when particularly there is big interference, differential pressure system tends to be unstable
Working condition, so current differential pressure system is often limited added with the high-low limit of valve opening and arranged equipped with manual intervention
It applies.In terms of the effect of coal-gas recovering, due to system operation be not sufficiently stable and flow control result deviate desired value, cause coal
Gas recovery index is difficult to be improved.In the particularly converter smelting later stage, as exhaust gas volumn gradually reduces, differential pressure control is obviously lost
Due control action have been gone, CO contents has been caused to reduce, oxygen content raising so that the coal-gas recovering process for smelting the later stage is very short,
Seriously constrain coal-gas recovering rate.
By in depth analyzing, studying, the technology way for not being is transformed and improved on the basis of existing technology
Diameter because the prior art there are it is intrinsic the defects of, need to innovatively find a new way, the most effective means solved the problems, such as are to adopt
With two close cycles dynamic optimization LT methods coal-gas recovering and Fan Energy-saving control method.This method is made of two Closed dynamitic systems,
First, the Closed dynamitic system of fans entrance valve opening is controlled according to converter gas amount, second is that adjusting wind turbine according to micro-differential pressure
The Closed dynamitic system of rotating speed；The aperture of fans entrance valve is controlled according to converter gas amount, flue gas can be made to flow through the stream of inlet valve
Amount and flow velocity are controlled preferably and utilize, and are conducive to improve efficiency of dust collection, are conducive to the energy saving of wind turbine；According to fire door elementary errors
The rotating speed of voltage-controlled wind turbine processed can make furnace pressure control reduce or eliminate the excessive of inner flue gas of the stove in the range of requiring, reduce
Or the sucking of fire door air is eliminated, be conducive to improve the calorific value of gas recovery, advantageously reduce the burning phase before smelting and burn the phase afterwards
Oxygen content is conducive to extend the coal-gas recovering time.
Substantially, fans entrance valve opening should be corresponding with turning inner flue gas of the stove occurrence quantity, i.e., fans entrance valve opening depends on
In practical exhaust gas volumn, the variation of fans entrance valve opening is changed pipe system performance curve, and wind turbine load changes therewith.When
When converter gas amount is big, inlet valve is opened greatly, and wind turbine load increases；When converter gas amount is small, inlet valve turns down, and wind turbine load subtracts
It is small.Obviously, it is the method that most directly controls flow to control the aperture of fans entrance valve according to exhaust gas volumn, and uses fire door elementary errors
Voltage-controlled fans entrance valve opening processed is the method for indirect control flow, and due to flow and pressure non-linear variation and
The nonlinear characteristic of inlet valve in itself so that final controls the control result of flow to deviate desired value by differential pressure, even
Cause the irregular operation of system.
Under conditions of to fans entrance valve opening accordingly control according to exhaust gas volumn, wind is controlled using micro-differential pressure
The speed of machine is simple, effective, the method stablized for ensureing converter furnace pressure, and the flow velocity of flue gas and pressure obtain in pipe network
Good to improve, the slewing range of wind turbine has obtained large increase, can meet burning phase and rear burning phase coal-gas recovering and wind before smelting
The demand of machine energy saving optimizing.
Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method are realized by the system of attached drawing
, coal-gas recovering and blower fan system processing data information and control device [1] they are two close cycles dynamic optimization LT method converters in attached drawing
Coal-gas recovering and the core of Fan Energy-saving control, are the digital devices formed based on computer workstation, itself has
LT method converter gas amount databases, and in real time production run lock file, equipment are obtained from converter process master control system [2]
Status information and related systematic parameter obtain gas recovery system from coal-gas recovering and fan speed regulation dynamic controller [3] in real time
And fan operation is for information about, and coal-gas recovering is determined according to these information, related systematic parameter and exhaust gas volumn related data
And fan speed regulation control parameter and export to coal-gas recovering and fan speed regulation dynamic controller [3]；Especially by converter cigarette
Tolerance database can easily and accurately calculate fans entrance valve opening value, be then output to coal-gas recovering and fan speed regulation
Dynamic controller [3] carries out dynamic control to fans entrance valve opening；Coal-gas recovering and fan speed regulation dynamic controller [3] by
PLC (programmable controller) or other digital controllers composition, according to coal-gas recovering and blower fan system processing data information
And the control parameter of control device [1] exports setting value to wind turbine inlet valve driving device [4]；Coal-gas recovering and fan speed regulation move
State controller [3], fans entrance valve drive [4], fans entrance valve [5], fans entrance valve opening sensor [6] and coal gas
The closed-loop dynamic that recycling and wind turbine process system [12] constitute fans entrance valve opening is adjusted；Coal-gas recovering and wind turbine tune
Fast dynamic controller [3] receives to set from coal-gas recovering and the differential pressure of blower fan system processing data information and control device [1]
Definite value, output fan frequency converter [7], is adjusted rotation speed of fan；Pressure detector [10] is more than 3 pressure
One group of pressure-detecting device of detector composition, is set to a certain position on petticoat pipe, detection information is sent to coal-gas recovering and wind
Machine speed governing dynamic controller [3], for accurately and reliably measuring furnace pressure；Coal-gas recovering and fan speed regulation dynamic controller
[3], fan frequency control device [7], fan electromotor [8], wind turbine [9], pressure detector [10] and coal-gas recovering and wind turbine
The closed-loop dynamic that process system [12] constitutes micro-differential pressure is adjusted；Technological parameter and status information of equipment [11] and coal
Gas recycles and fan speed regulation dynamic controller [3], coal-gas recovering and wind turbine process system [12] are connected；Using such
System realizes the closed-loop dynamic continuous control of fans entrance valve opening and the closed-loop dynamic continuous control of micro-differential pressure.
About converter gas amount, during converter smelting, exhaust gas volumn is dynamic change, influences the principal element of exhaust gas volumn
There are blowing oxygen quantity and intensity, molten iron charge weight and ingredient, steel scrap charge weight and ingredient, auxiliary material input amount and ingredient, ladle refining
Amount and ingredient, the duration of heat etc. can carry out off-line calculation to flue gas occurrence quantity according to correlative factor and on-line amending calculate, greatly
Gauge counts according to the basis for being composition computer workstation database, and the exhaust gas volumn of large disturbances is also to pass through off-line calculation when feeding intake
And on-line amending calculates what the database that data are formed obtained, by actual motion, when data and the actual motion feelings of database
When there is any discrepancy, factually actual value is modified database, updates fibrous root condition.One of converter steelmaking process exhaust gas volumn variation is significantly
Feature is, with the passage of the duration of heat, exhaust gas volumn gradually decreases, and particularly smelts the later stage, and exhaust gas volumn will be much less,
The perception that existing control technology changes this exhaust gas volumn is insensitive, and CO contents is caused to be reduced rapidly in the smelting later stage, make coal gas
Yield is reduced.Completely different with this is that two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method exist
Dynamic regulation can be carried out according to converter gas amount to fans entrance valve by smelting the later stage, and with the reduction of exhaust gas volumn, inlet valve is opened
Degree is gradually reduced, while rotation speed of fan accordingly reduces, so, even smelting the later stage, ensure that using this control strategy
The change in flow for flowing through inlet valve is little, ensure that CO changes of contents is little, ensure that oxygen content variation is little, therefore can increase
Add time and the calorific value of gas of coal-gas recovering, the amount of energy saving of wind turbine can be improved.
The characteristics of two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method be science, rationally, fill
Point, effectively played function and the effect of fans entrance valve opening and fan speed regulation, the single control of the prior art is optimized
Two Closed dynamitic systems of fan speed are adjusted into according to the control of the fans entrance valve opening of exhaust gas volumn and according to micro-differential pressure,
System form it is simple and direct, effective operation, it is reliable, stablize, debugging it is also extremely convenient, it can be achieved that coal-gas recovering without intervene manually and
The Automatic Control of Fan Energy-saving.
Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method for LT methods RECOVERY OF CONVERTER GAS and
Completely new, the extensive visual field and space have been started in wind turbine variable speed energy conservation application, using two close cycles dynamic optimization LT method coal gas of converter
After recycling and Fan Energy-saving control method, the raising of coal-gas recovering rate can be obtained, can also make wind turbine further energy saving, it is contemplated that coal
Gas recovery rate will improve 10%~50% on the basis of current different system, and Fan Energy-saving index will be on the basis of the prior art
It is upper to improve 12%~40%.
Two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method can be widely applied to create, extend
Or all kinds of LT methods converter dust-removing gas recovery systems of transformation.
Claims (5)
1. a kind of two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS and Fan Energy-saving control method, it is characterized in that according to converter cigarette
Tolerance adjusts the aperture of fans entrance valve, forms fans entrance valve opening control Closed dynamitic system；According to micro-differential pressure control
The speed of wind turbine processed forms micro-differential pressure control Closed dynamitic system；By two Closed dynamitic systems organically with reference to next
Obtain good coal-gas recovering effect and Fan Energy-saving effect.
2. two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS according to claim 1 and Fan Energy-saving control method,
System composition is characterized in that coal-gas recovering and blower fan system processing data information and control device [1] are two close cycles dynamic optimization LT
Method RECOVERY OF CONVERTER GAS and the core of Fan Energy-saving control, are the digital devices formed based on computer workstation, this
Body has LT method converter gas amount databases, and obtains production run interlocking letter from converter process master control system [2] in real time
Breath, status information of equipment and related systematic parameter obtain coal gas from coal-gas recovering and fan speed regulation dynamic controller [3] in real time and return
Receipts system and fan operation for information about, coal are determined according to these information, related systematic parameter and exhaust gas volumn related data
The control parameter of gas recycling and fan speed regulation is simultaneously exported to coal-gas recovering and fan speed regulation dynamic controller [3]；Especially by
Converter gas amount database can easily and accurately calculate fans entrance valve opening value, be then output to coal-gas recovering and wind
Machine speed governing dynamic controller [3] carries out dynamic control to fans entrance valve opening；Coal-gas recovering and fan speed regulation dynamic controller
[3] it is made of PLC (programmable controller) or other digital controllers, according to coal-gas recovering and blower fan system data information
The control parameter of processing and control device [1] exports setting value to wind turbine inlet valve driving device [4]；Coal-gas recovering and wind turbine tune
Fast dynamic controller [3], fans entrance valve drive [4], fans entrance valve [5], fans entrance valve opening sensor [6] and
The closed-loop dynamic that coal-gas recovering and wind turbine process system [12] constitute fans entrance valve opening is adjusted；Coal-gas recovering and wind
Machine speed governing dynamic controller [3] receives from coal-gas recovering and the fire door of blower fan system processing data information and control device [1]
Differential pressure setting value, output fan frequency converter [7], is adjusted rotation speed of fan；Pressure detector [10] is more
In one group of pressure-detecting device of 3 pressure detector compositions, a certain position on petticoat pipe is set to, detection information is sent to coal gas
Recycling and fan speed regulation dynamic controller [3], for accurately and reliably measuring furnace pressure；Coal-gas recovering and fan speed regulation move
State controller [3], fan frequency control device [7], fan electromotor [8], wind turbine [9], pressure detector [10] and coal gas return
The closed-loop dynamic that receipts and wind turbine process system [12] constitute micro-differential pressure is adjusted；Technological parameter and status information of equipment
[11] it is connected with coal-gas recovering and fan speed regulation dynamic controller [3], coal-gas recovering and wind turbine process system [12]；It adopts
With such system realize fans entrance valve opening closed-loop dynamic continuous control and micro-differential pressure closed-loop dynamic it is continuous
Control.
3. two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS according to claim 2 and Fan Energy-saving control method is
System is formed, wherein the converter gas amount database is characterized in during converter smelting, exhaust gas volumn is dynamic change, shadow
Ringing the principal element of exhaust gas volumn has blowing oxygen quantity and intensity, molten iron charge weight and ingredient, steel scrap charge weight and ingredient, auxiliary material input
Amount and ingredient, ladle refining amount and ingredient, the duration of heat etc. can carry out off-line calculation according to correlative factor to flue gas occurrence quantity
And on-line amending calculates, a large amount of data that calculate are to form the basis of computer workstation database, the flue gas of large disturbances when feeding intake
Amount is also that the database formed by off-line calculation and on-line amending calculating data obtains, and by actual motion, works as database
Data and practical operation situation when there is any discrepancy, factually actual value is modified database, updates fibrous root.
4. two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS according to claim 1 and Fan Energy-saving control method,
It is characterized in that dynamic regulation can be carried out to fans entrance valve according to converter gas amount smelting the later stage, with the reduction of exhaust gas volumn,
Entrance valve opening is gradually reduced, while rotation speed of fan accordingly reduces, so, even smelting the later stage, using this control plan
It slightly ensure that the change in flow for flowing through inlet valve is little, ensure that CO changes of contents is little, ensure that oxygen content variation is little, because
This can increase the time of coal-gas recovering and calorific value of gas, can improve the amount of energy saving of wind turbine.
5. two close cycles dynamic optimization LT methods RECOVERY OF CONVERTER GAS according to claim 1 and Fan Energy-saving control method,
It is characterized in that this method can be widely applied to all kinds of LT methods converter dust-removing gas recovery systems for creating, extending or being transformed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611254529.1A CN108265153B (en) | 2016-12-30 | 2016-12-30 | Double-closed-loop dynamic optimization LT method converter gas recovery and fan energy-saving control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611254529.1A CN108265153B (en) | 2016-12-30 | 2016-12-30 | Double-closed-loop dynamic optimization LT method converter gas recovery and fan energy-saving control method |
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| CN108265153B CN108265153B (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226570A (en) * | 2020-10-15 | 2021-01-15 | 南京罕华流体技术有限公司 | Converter online diagnosis energy-saving consumption-reducing SADS system |
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| JPH08122477A (en) * | 1994-10-20 | 1996-05-17 | Hitachi Ltd | Control rod drive system |
| JP2000140663A (en) * | 1998-11-09 | 2000-05-23 | Babcock Hitachi Kk | Roller mill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226570A (en) * | 2020-10-15 | 2021-01-15 | 南京罕华流体技术有限公司 | Converter online diagnosis energy-saving consumption-reducing SADS system |
| CN112226570B (en) * | 2020-10-15 | 2022-06-10 | 南京罕华流体技术有限公司 | Converter online diagnosis energy-saving consumption-reducing SADS system |
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| Publication number | Publication date |
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| CN108265153B (en) | 2020-02-07 |
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