CN110699525B - Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace - Google Patents
Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace Download PDFInfo
- Publication number
- CN110699525B CN110699525B CN201910915574.4A CN201910915574A CN110699525B CN 110699525 B CN110699525 B CN 110699525B CN 201910915574 A CN201910915574 A CN 201910915574A CN 110699525 B CN110699525 B CN 110699525B
- Authority
- CN
- China
- Prior art keywords
- hydrogen
- nitrogen
- furnace
- control
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a control system for reducing the consumption of nitrogen and hydrogen of a vertical annealing furnace, which comprises: the energy-saving system is respectively connected with the abnormality detection system; the output end of the abnormality detection system is respectively connected with the control fault diagnosis system and the hearth air tightness checking unit, and the input end of the abnormality detection system is connected with the energy-saving system; the output end of the nitrogen and hydrogen flow control system is connected with the furnace area speed, and the input end of the nitrogen and hydrogen flow control system is connected with the energy-saving system; the abnormal detection system is used for establishing a periodic hearth air tightness detection system and a control fault diagnosis system; the nitrogen and hydrogen consumption is saved, and the cost is saved; the invention combines the dual control modes of pressure control and flow control; the invention adds a plurality of control modes of a variable pressure control mode, an ultra-low pressure control mode and a low pressure control mode.
Description
Technical Field
The invention belongs to the technical field of control of nitrogen and hydrogen consumption of annealing furnaces, and particularly relates to a control system for reducing nitrogen and hydrogen consumption of a vertical annealing furnace.
Background
The cold rolling vertical annealing furnace is for preventing that belted steel is by oxidation under the high temperature condition, often pour into a large amount of nitrogen into the stove as inert protective gas, a small amount of hydrogen provides reducing atmosphere, as for the annealing furnace, nitrogen gas, hydrogen account for a majority of energy consumption, to normal production or start, shut down the operation, propose different flow control strategies, establish nitrogen gas in addition, hydrogen unusual detecting system, avoid failing in time to discover the nitrogen gas that leads to because of equipment is unusual, the increase problem of hydrogen consumption, how to carry out reasonable control to nitrogen gas, hydrogen flow and to "cost reduction increase" urgent need to be solved.
Therefore, a control system for reducing the consumption of nitrogen and hydrogen of the vertical annealing furnace is provided
Disclosure of Invention
The invention aims to provide a control system for reducing the consumption of nitrogen and hydrogen of a vertical annealing furnace, which aims to solve the problems that different flow control strategies are provided aiming at normal production and shutdown operation in the background technology, and a nitrogen and hydrogen abnormity detection system is established to avoid the increase of the consumption of nitrogen and hydrogen caused by the failure of timely finding out equipment abnormity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace, comprising:
the energy-saving system is respectively connected with the abnormality detection system;
the output end of the abnormality detection system is respectively connected with the control fault diagnosis system and the hearth air tightness checking unit, and the input end of the abnormality detection system is connected with the energy-saving system;
the output end of the nitrogen and hydrogen flow control system is connected with the furnace area speed, and the input end of the nitrogen and hydrogen flow control system is connected with the energy-saving system;
the abnormal detection system is used for establishing a periodic hearth air tightness detection system and a control fault diagnosis system;
the nitrogen and hydrogen flow control system is used for controlling the deviation of the nitrogen flow and a theoretical value and the deviation of the actual calculation of the hydrogen flow ratio and the detection number of the instrument.
The present invention is further preferred: the nitrogen and hydrogen flow control system comprises a control center, a timer, a flow sensor, a gas flow control valve and an annealing furnace, wherein the timer, the flow sensor, the gas flow control valve and the annealing furnace are all connected with the control center;
the flow sensor is used for detecting the flow of nitrogen and hydrogen introduced into the chip tester;
the gas flow control valve is arranged in the flow pipeline of the nitrogen and the hydrogen and used for controlling the on-off of the flow pipeline of the nitrogen;
the timer is used for setting the preset time.
The present invention is further preferred: the control center comprises any one or more of a PLC control module, a central processing unit, a singlechip and an A/D converter.
The present invention is further preferred: the hearth airtightness checking unit comprises a furnace top cover, a furnace bottom cover, an access hole and a furnace top bleeding valve.
The present invention is further preferred: the furnace zone speed is respectively connected with a variable pressure control mode, a low pressure control mode and an ultra-low pressure control mode.
The present invention is further preferred: the control fault diagnosis system comprises a fault diagnosis module, a display module, a master control module, a DSP module, an alarm module and a wireless communication module, wherein the fault diagnosis module comprises a power supply module, a power supply module and a power supply module
The fault diagnosis module is used for detecting and diagnosing a fault with abnormal gas ratio;
the display module is used for displaying abnormal fault information, wherein the display module comprises a display screen;
the DSP module is used for comparing data measured by the airflow sensor with a preset alarm threshold value;
and the alarm module is used for giving an alarm according to the comparison result of the DSP module, wherein the alarm module comprises any one or more of an alarm whistle, a buzzer and a loudspeaker.
The present invention is further preferred: the control fault diagnosis system is respectively connected with the hydrogen pipeline, the nitrogen purging valve and the fault analyzer
The present invention is further preferred: the energy-saving system is connected with the monitoring unit, and the monitoring unit comprises a display, a computer and a camera.
The invention has the technical effects and advantages that: compared with the prior art, the control system for reducing the consumption of nitrogen and hydrogen of the vertical annealing furnace has the following advantages that:
1. the nitrogen and hydrogen consumption is saved, the processing cost in the annealing of the strip steel is reduced, and the cost is saved;
2. the invention combines the dual control modes of pressure control and flow control;
3. the invention adds a plurality of control modes of a variable pressure control mode, an ultra-low pressure control mode and a low pressure control mode;
4. according to the method, the automatic diagnosis of the abnormal consumption of the nitrogen and the hydrogen in the furnace is realized by establishing a model, and the technical problem that the abnormal consumption of the nitrogen and the hydrogen in the furnace cannot be evaluated is solved;
5. according to the characteristics of the strip steel in the furnace, the set value of the furnace pressure is intelligently set, and the technical problem that the traditional furnace pressure control mode pressure set value is manually designed by an operator is solved.
Drawings
FIG. 1 is a schematic block diagram of a system of the present invention;
FIG. 2 is a schematic diagram of a portion of the system of the present invention;
FIG. 3 is a schematic diagram of a nitrogen and hydrogen flow control system according to the present invention;
FIG. 4 is a block diagram of a control fault diagnostic system of the present invention;
FIG. 5 is a schematic diagram of a control center module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace, which is shown in figures 1-5 and comprises:
the energy-saving system is respectively connected with the abnormality detection system;
the output end of the abnormality detection system is respectively connected with the control fault diagnosis system and the hearth air tightness checking unit, and the input end of the abnormality detection system is connected with the energy-saving system;
the output end of the nitrogen and hydrogen flow control system is connected with the furnace area speed, and the input end of the nitrogen and hydrogen flow control system is connected with the energy-saving system;
the abnormal detection system is used for establishing a periodic hearth air tightness detection system and a control fault diagnosis system;
the nitrogen and hydrogen flow control system is used for controlling the deviation of the nitrogen flow and a theoretical value and the deviation of the actual calculation of the hydrogen flow ratio and the detection number of the instrument.
The invention specifically comprises the following steps: the nitrogen and hydrogen flow control system comprises a control center, a timer, a flow sensor, a gas flow control valve and an annealing furnace, wherein the timer, the flow sensor, the gas flow control valve and the annealing furnace are all connected with the control center;
the flow sensor is used for detecting the flow of nitrogen and hydrogen introduced into the chip tester;
the gas flow control valve is arranged in the flow pipeline of the nitrogen and the hydrogen and used for controlling the on-off of the flow pipeline of the nitrogen;
the timer is used for setting the preset time.
The invention specifically comprises the following steps: the control center comprises any one or more of a PLC control module, a central processing unit, a singlechip and an A/D converter.
The invention specifically comprises the following steps: the hearth airtightness checking unit comprises a furnace top cover, a furnace bottom cover, an access hole and a furnace top bleeding valve.
The invention specifically comprises the following steps: the furnace zone speed is respectively connected with a variable pressure control mode, a low pressure control mode and an ultra-low pressure control mode.
Firstly, the low-pressure control mode:
if the residence time of the strip steel in the furnace satisfies t is less than or equal to alpha, activating the nitrogen and hydrogen flow pressure regulation control mode,
the furnace pressure set value of the annealing furnace is p1＝λ1·p0；
Hydrogen flow rate set point set to spL-H2，
The nitrogen flow set point is adjusted based on the deviation of the furnace zone pressure set point and the actual value of the hot zone.
t: the retention time of the strip steel in the annealing furnace is h;
α: the critical duration h of the low-pressure control mode and the ultra-low-pressure control mode is 2-12 hours, and the method is preferable; .
p1: a pressure set value, Pa, of the low pressure control mode;
p0: setting an initial value, Pa, of furnace pressure;
λ1: the low-pressure conversion coefficient is 0.8-1.0, preferably 0.9;
spl-H2: the set value of the hydrogen in the low-pressure control mode is 1.5-4%, preferably 2.0%
Two, ultra low voltage control mode
If the residence time of the strip steel in the furnace meets t & gt alpha, activating an ultra-low pressure adjusting mode of nitrogen and hydrogen flow:
the furnace pressure set value of the annealing furnace is p2＝λ2·p0；
Adjusting sp for hydrogen flow rate set point based on oxygen content in hot zoneh-H2＝f1(O2) The relationship between the oxygen content and the hydrogen gas is shown in Table 1.
The nitrogen flow rate set value is adjusted by a PID controller according to the deviation of the furnace zone pressure set value and the actual value of the hot zone.
p2: a furnace pressure set value of an ultra-low pressure control mode, Pa;
λ2: the furnace pressure conversion coefficient of the ultra-low pressure control mode is dimensionless and is 0.6-0.8, and the method is preferably as follows: 0.75;
sph-H2: the set value of the hydrogen in the ultra-low pressure control mode is 0-1.5%, and the preferred value of the hydrogen is 0.8%.
Three, variable pressure control mode
When the speed v of the strip steel in the furnace area is more than 0, activating a nitrogen and hydrogen flow variable pressure control and regulation mode: at this time, the pressure set value is changed along with the speed and width changes of the strip steel, p3＝p0+px·λv·λw
The hydrogen flow set value is switched to the production requirement set value, generally 4.5 percent;
λv: the furnace pressure and speed factor in the variable pressure control mode is dimensionless;
λw: the furnace pressure width factor of the variable pressure control mode is dimensionless;
p3: pressure set value, Pa, of variable pressure control mode
px: compensation of furnace pressure, Pa, 0-150
λv＝v/vmax
v: the running speed of the strip steel in the furnace area is m/min;
vmax: maximum design speed, m/min;
λw＝(w-wmin)/(wmax-wmin)
w: the width of strip steel in the furnace is mm;
wmax: the maximum strip steel width is designed by the machine set and is mm;
wmin: the minimum strip steel width and mm are designed for the unit;
2. nitrogen and hydrogen anomaly detection system
2.1 hearth airtightness detection system
Activation conditions are as follows: in a non-high hydrogen mode, activating every 12 hours;
after activation:
the nitrogen and hydrogen control mode of the annealing furnace is switched from the flow control mode to the constant pressure control mode,
the furnace zone pressure is kept at the current set value,
the blow-off valve at the top of the furnace is closed,
if the actual amount of the mixed gas F is nitrogen-hydrogena≥κ1·FmAnd then an alarm is given, and the furnace area has a leakage point and needs to be checked.
Fa: actual flow rate, Nm, of mixed gas of nitrogen and hydrogen3/h；
Fm: theoretical flow, Nm, of mixed gas of nitrogen and hydrogen at different pressures3/h，
Remarking: under the condition of certain pressure in the furnace zone, under the condition that the diffusion valve of the furnace zone is completely closed, within the duration of alpha time, the minimum flow of the nitrogen-hydrogen mixed gas corresponding to the oxygen content in the furnace zone is less than or equal to 10ppm, namely Fm。
κ1: the flow fluctuation coefficient of the nitrogen-hydrogen mixed gas is dimensionless, and is 1.1-1.3, the preferable 1.15 of the invention
2.2 Fault diagnosis System
If the ratio of hydrogen to nitrogen satisfies one of the following conditions:
λ3: the lower limit of abnormal control of the hydrogen proportion is taken as 0.8-0.95 without dimension;
λ4: the upper limit of the abnormal control of the hydrogen proportion is taken as 1.05-1.2 without dimension;
R1: detecting the numerical value,%, by a hydrogen analyzer;
κ2controlling the upper limit of the error, taking 0.1-0.1 without dimension.
Then an alarm is triggered: "atmosphere mixture ratio is abnormal". The reasons are mainly two kinds: inner leakage of hydrogen pipeline nitrogen purging valve and abnormal measurement of analyzer
The invention specifically comprises the following steps: the control fault diagnosis system comprises a fault diagnosis module, a display module, a master control module, a DSP module, an alarm module and a wireless communication module, wherein the fault diagnosis module comprises a power supply module, a power supply module and a power supply module
The fault diagnosis module is used for detecting and diagnosing a fault with abnormal gas ratio;
the display module is used for displaying abnormal fault information, wherein the display module comprises a display screen;
the DSP module is used for comparing data measured by the airflow sensor with a preset alarm threshold value;
and the alarm module is used for giving an alarm according to the comparison result of the DSP module, wherein the alarm module comprises any one or more of an alarm whistle, a buzzer and a loudspeaker.
The invention specifically comprises the following steps: the control fault diagnosis system is respectively connected with the hydrogen pipeline, the nitrogen purging valve and the fault analyzer
The invention specifically comprises the following steps: the energy-saving system is connected with the monitoring unit, and the monitoring unit comprises a display, a computer and a camera.
The invention provides a relation between oxygen content, hydrogen and furnace pressure in an ultra-low pressure control mode of an annealing furnace, which is shown in the following table 1:
| oxygen content (ppm) in the hearth | 5 | 10 | 50 | 100 | 500 | 1000 | 2000 |
| H2 set point (%) | 0％ | 1 | 1.5 | 2 | 2.5 | 3 | 3 |
| Furnace pressure set value (Pa) | p2 | p2 | p2 | P2 | P2 | P0 | P0 |
TABLE 1
By establishing a periodic hearth airtightness detection system and a control fault diagnosis system, whether a furnace area has a leakage point is judged according to the deviation of the actual nitrogen flow and a theoretical value, and whether a flow control system has a fault is judged according to the actual calculation of the hydrogen ratio and the detection of an instrument.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace, comprising:
the energy-saving system is respectively connected with the abnormality detection system and the nitrogen and hydrogen flow control system;
the output end of the abnormality detection system is respectively connected with the control fault diagnosis system and the hearth air tightness checking unit, and the input end of the abnormality detection system is connected with the energy-saving system;
the output end of the nitrogen and hydrogen flow control system is connected with the furnace area speed, and the input end of the nitrogen and hydrogen flow control system is connected with the energy-saving system;
the furnace zone speed is respectively connected with a variable pressure control mode, a low pressure control mode and an ultra-low pressure control mode;
the abnormal detection system is used for establishing a periodic hearth air tightness detection system and a control fault diagnosis system;
the nitrogen and hydrogen flow control system is used for controlling the deviation of the nitrogen flow and a theoretical value and the deviation of the actual calculation of hydrogen flow ratio and the detection number of the instrument;
the control fault diagnosis system comprises a fault diagnosis module, a display module, a master control module, a DSP module, an alarm module and a wireless communication module, wherein the fault diagnosis module comprises a power supply module, a power supply module and a power supply module
The fault diagnosis module is used for detecting and diagnosing a fault with abnormal gas ratio;
the display module is used for displaying abnormal fault information, wherein the display module comprises a display screen;
the DSP module is used for comparing data measured by the airflow sensor with a preset alarm threshold value;
the alarm module is used for alarming according to the comparison result of the DSP module, wherein the alarm module comprises any one or more of an alarm whistle, a buzzer and a loudspeaker,
if the residence time of the strip steel in the furnace is satisfied
Activating the nitrogen and hydrogen flow rate pressure regulation control mode,
the furnace pressure set value of the annealing furnace is
(ii) a The hydrogen flow set point is set to spL-H2,
the set value of the nitrogen flow is adjusted according to the deviation of the set value of the furnace zone pressure of the hot zone and the actual value(ii) a t: the retention time of the strip steel in the annealing furnace is h;
: critical duration of the low-pressure control mode and the ultra-low-pressure control mode is 2-12 hours; p 1: a pressure set value, Pa, of the low pressure control mode; p 0: setting an initial value, Pa, of furnace pressure;
1: the low-pressure conversion coefficient is 0.8-1.0; spL-H2: taking the hydrogen set value in the low-pressure control mode to be 1.5-4%;
if the residence time of the strip steel in the furnace meets t & gt alpha, activating an ultra-low pressure adjusting mode of nitrogen and hydrogen flow:
annealing furnace pressure set point p2 ═
2 · p 0; the hydrogen flow set point was adjusted to f1 (O) sph-H2 based on the hot zone oxygen content2) (ii) a The set value of the nitrogen flow is adjusted by a PID controller according to the deviation of the set value and the actual value of the furnace area pressure of the hot area; p 2: a furnace pressure set value of an ultra-low pressure control mode, Pa;
2: the furnace pressure conversion coefficient of the ultra-low pressure control mode is dimensionless and is 0.6-0.8; sph-H2: taking the set value of the hydrogen in the ultra-low pressure control mode to be 0-1.5%; when the speed v of the strip steel in the furnace area is more than 0, activating a nitrogen and hydrogen flow variable pressure control and regulation mode: the pressure set value changes with the speed and width of the steel strip, p3 is p0 + px
v ·
w, switching the hydrogen flow set value to the production requirement set value, and taking 4.5 percent;
v: the furnace pressure and speed factor in the variable pressure control mode is dimensionless;
w: the furnace pressure width factor of the variable pressure control mode is dimensionless; p 3: a pressure set value of a variable pressure control mode, Pa; px: compensating the pressure of the furnace, and taking 0-150 Pa;
v ═ v/vmax; v: the running speed of the strip steel in the furnace area is m/min; vmax: maximum design speed, m/min;
w ═ w-wmin)/(wmax-wmin); w: the width of strip steel in the furnace is mm; wmax: the maximum strip steel width is designed by the machine set and is mm; wmin: the minimum strip steel width and mm are designed for the unit;
if the ratio of hydrogen to nitrogen satisfies one of the following conditions:
F H2 : hydrogen flow meter measurement value, Nm3 /h；
F N2 : nitrogen flow measurement value, Nm3 /h；
R 1 : detecting the numerical value,%, by a hydrogen analyzer;
an alarm is triggered.
2. The control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace according to claim 1, wherein: the nitrogen and hydrogen flow control system comprises a control center, a timer, a flow sensor, a gas flow control valve and an annealing furnace, wherein the timer, the flow sensor, the gas flow control valve and the annealing furnace are all connected with the control center;
the flow sensor is used for detecting the flow of nitrogen and hydrogen introduced into the chip tester;
the gas flow control valve is arranged in the flow pipeline of the nitrogen and the hydrogen and used for controlling the on-off of the flow pipeline of the nitrogen;
the timer is used for setting preset time.
3. The control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace according to claim 2, wherein: the control center comprises any one or more of a PLC control module, a central processing unit, a singlechip and an A/D converter.
4. The control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace according to claim 1, wherein: the hearth airtightness checking unit comprises a furnace top cover, a furnace bottom cover, an access hole and a furnace top bleeding valve.
5. The control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace according to claim 1, wherein: and the control fault diagnosis system is respectively connected with the hydrogen pipeline, the nitrogen purging valve and the fault analyzer.
6. The control system for reducing the consumption of nitrogen and hydrogen in a vertical annealing furnace according to claim 1, wherein: the energy-saving system is connected with the monitoring unit, and the monitoring unit comprises a display, a computer and a camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915574.4A CN110699525B (en) | 2019-09-26 | 2019-09-26 | Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910915574.4A CN110699525B (en) | 2019-09-26 | 2019-09-26 | Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110699525A CN110699525A (en) | 2020-01-17 |
| CN110699525B true CN110699525B (en) | 2021-11-05 |
Family
ID=69197993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910915574.4A Active CN110699525B (en) | 2019-09-26 | 2019-09-26 | Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110699525B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030044375A (en) * | 2001-11-29 | 2003-06-09 | 주식회사 포스코 | Control system for obtaining stable inner gas pressure of annealing furnace |
| CN101117659A (en) * | 2006-08-04 | 2008-02-06 | 重庆钢铁集团电子有限责任公司 | Full-hydrogen hood-type annealing furnace control system |
| CN102876864A (en) * | 2012-09-25 | 2013-01-16 | 攀钢集团西昌钢钒有限公司 | Control system and closed-loop control method for hearth atmosphere of annealing furnace and closed-loop control method |
| CN205077118U (en) * | 2015-09-16 | 2016-03-09 | 武汉钢铁(集团)公司 | Full automatic temperature control system of finished product annealing stove |
| CN105648205A (en) * | 2016-03-10 | 2016-06-08 | 中冶南方工程技术有限公司 | Vertical annealing furnace and in-furnace hydrogen content control method and device |
| JP2017197801A (en) * | 2016-04-27 | 2017-11-02 | Ｊｆｅスチール株式会社 | Control method of in-furnace atmosphere gas in continuous annealing furnace |
| CN108070707A (en) * | 2016-11-15 | 2018-05-25 | 上海梅山钢铁股份有限公司 | A kind of method of the quick furnace lifting of vertical continuous annealing furnace |
-
2019
- 2019-09-26 CN CN201910915574.4A patent/CN110699525B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030044375A (en) * | 2001-11-29 | 2003-06-09 | 주식회사 포스코 | Control system for obtaining stable inner gas pressure of annealing furnace |
| CN101117659A (en) * | 2006-08-04 | 2008-02-06 | 重庆钢铁集团电子有限责任公司 | Full-hydrogen hood-type annealing furnace control system |
| CN102876864A (en) * | 2012-09-25 | 2013-01-16 | 攀钢集团西昌钢钒有限公司 | Control system and closed-loop control method for hearth atmosphere of annealing furnace and closed-loop control method |
| CN205077118U (en) * | 2015-09-16 | 2016-03-09 | 武汉钢铁(集团)公司 | Full automatic temperature control system of finished product annealing stove |
| CN105648205A (en) * | 2016-03-10 | 2016-06-08 | 中冶南方工程技术有限公司 | Vertical annealing furnace and in-furnace hydrogen content control method and device |
| JP2017197801A (en) * | 2016-04-27 | 2017-11-02 | Ｊｆｅスチール株式会社 | Control method of in-furnace atmosphere gas in continuous annealing furnace |
| CN108070707A (en) * | 2016-11-15 | 2018-05-25 | 上海梅山钢铁股份有限公司 | A kind of method of the quick furnace lifting of vertical continuous annealing furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110699525A (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105509242B (en) | A kind of refrigerant super-addition control method for air conditioner | |
| CN106016621B (en) | A kind of leak detection control method of multi-online air-conditioning system | |
| CN101922993B (en) | On-line real-time monitoring hearth sealability early-warning device and early-warning method | |
| CN109282423B (en) | Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system | |
| KR20150056834A (en) | Method and device for determining and/or monitoring the airtightness of an enclosed room | |
| CN110332648B (en) | Control method and device of electronic expansion valve and multi-connected air conditioning system | |
| CN112944586B (en) | Control method of multi-split air conditioning system | |
| CN110699525B (en) | Control system for reducing consumption of nitrogen and hydrogen of vertical annealing furnace | |
| CN110699527A (en) | Operation method of nitrogen interlocking control system for detecting oxygen content on hot galvanizing vertical annealing furnace | |
| JPWO2006033175A1 (en) | Gas turbine equipment, low calorie gas supply equipment, and method for suppressing calorie rise of the gas | |
| KR20090030515A (en) | Heater for annealing furnace | |
| CN116445709A (en) | Method for controlling continuous annealing and oxidation color defect of strip steel | |
| KR101760458B1 (en) | Apparatus for controlling of gas pressure of annealing furnace | |
| KR20110054675A (en) | Nitrogen gas supplying system for diluting hydrogen gas in process gas exhaust line for semiconductor fabricating process | |
| JP2012251764A (en) | Method for controlling vacuum pump in industrial furnace equipment | |
| WO2006035522A1 (en) | Gas turbine apparatus, low calorie content gas feeding apparatus, and method of suppressing rise of calorie content of the gas | |
| CN113999966B (en) | Method for reducing nitrogen amount entering furnace by increasing furnace pressure compensation button | |
| CN206660782U (en) | It is adapted to the energy-saving off-gas oxidizing processing system of multi-state | |
| CN219037554U (en) | Stable control system for top temperature of gas-based shaft furnace | |
| JPH08261399A (en) | Parallel operation device and control method for gas holder | |
| KR100530329B1 (en) | Control system for obtaining stable inner gas pressure of annealing furnace | |
| CN110218857B (en) | Oxidation color strip steel annealing and decoloring device and oxidation color strip steel annealing and decoloring method | |
| CN113565801B (en) | Sealing and heat-preserving device of low-temperature compressor and control method thereof | |
| CN220420531U (en) | Cooling system and silicon carbide high-temperature heat treatment equipment | |
| CN220012725U (en) | Dew point control device of horizontal tension annealing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |