CN110736107A - Safety ignition control system and control method for heating furnace burners - Google Patents
Safety ignition control system and control method for heating furnace burners Download PDFInfo
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- CN110736107A CN110736107A CN201911127694.4A CN201911127694A CN110736107A CN 110736107 A CN110736107 A CN 110736107A CN 201911127694 A CN201911127694 A CN 201911127694A CN 110736107 A CN110736107 A CN 110736107A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 230000003993 interaction Effects 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 127
- 238000010926 purge Methods 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000003034 coal gas Substances 0.000 claims description 4
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
- F23Q13/02—Igniters not otherwise provided for using gas burners, e.g. gas pokers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a heating furnace burner safe ignition control system, which comprises a Programmable Logic Controller (PLC), a human-computer interaction touch display screen, a pressure valve, a reset valve, a flow regulating valve, an ignition device, a flame detector and a temperature detector, wherein the PLC is respectively electrically connected with the human-computer interaction touch display screen, the pressure valve, the reset valve, the flow regulating valve, the ignition device, the flame detector and the temperature detector.
Description
Technical Field
The invention belongs to the technical field of industrial heating furnaces, and particularly relates to a safe ignition control system and a safe ignition control method for heating furnace burners.
Background
The heating furnace is of energy-using equipment mainly used in a steel rolling process of a steel enterprise, the heating furnace mainly has the function of heating steel billets of various specifications, a burner is a heating device of the heating furnace, the normal operation of the burner plays a vital role in the safe operation of the heating furnace, the initial stage of ignition of the burner is the main stage of safety accidents, and if the burner is extinguished in the ignition process of the heating furnace, a large amount of gas is easily accumulated in the furnace to cause the explosion accidents of the heating furnace.
Therefore, researches and developments on safe ignition control systems and control methods for the burner of the heating furnace, which can effectively solve the problems of gas leakage and labor intensity reduction of operators in the ignition process of the heating furnace, and have high automation degree are the key points for solving the problem.
Disclosure of Invention
The invention aims to provide heating furnace burner safe ignition control systems and control methods.
The th purpose of the invention is realized by the following steps that the PLC is arranged in an operation cabinet, the human-computer interaction touch display screen is arranged on the surface of a panel of the operation cabinet, the pressure valve, the reset valve and the flow regulating valve are arranged on an air pipeline and a gas pipeline, the ignition device and the flame detector are arranged near the burners of each ignition unit of the heating furnace, the temperature detector is arranged in a hearth of the heating furnace, and the PLC is respectively and electrically connected with the human-computer interaction touch display screen, the pressure valve, the reset valve, the flow regulating valve, the ignition device, the flame detector and the temperature detector.
The second object of the present invention is achieved by comprising the steps of:
1) preparing before ignition, checking that all equipment has safe operation conditions, and opening a manual valve;
2) purging control, (a) the Programmable Logic Controller (PLC) dispatches residual gas in the hearth by controlling a purging electromagnetic valve and a flue flashboard on a purging pipeline and utilizing nitrogen, wherein the purging time is set by a touch screen, and (b) the Programmable Logic Controller (PLC) dispatches the residual gas in the hearth by controlling an induced draft fan, a pressure valve and a flow regulating valve on an air pipeline, and the purging time is set by the touch screen;
3) ignition control, wherein a Programmable Logic Controller (PLC) controls to open an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline, and controls an ignition transformer of an ignition device to ignite the mixed gas of an ignition nozzle;
4) ignition control is carried out on the ignition section, the flame detector detects that all the ignition burners are ignited, the Programmable Logic Controller (PLC) controls a main gas reset valve and a main gas flow regulating valve of the ignition section to be opened, and ignition of the main burners of the ignition section is finished through the ignition burners;
5) the igniter is controlled to be cut off, when the temperature detector detects that the temperatures of all ignition sections reach the self-ignition temperature, the Programmable Logic Controller (PLC) controls an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline to be closed, controls an induced draft fan and the ignition flow regulating valve on an ignition air pipeline to be closed, and cuts off gas and air for the ignition burner;
6) and (3) controlling ignition of the non-ignition section, and when the temperature detector detects that the furnace temperature of the non-ignition section reaches an auto-ignition temperature value, controlling a gas reset valve and a gas flow regulating valve on a branch gas pipeline of the non-ignition section and an electromagnetic valve on a branch air pipeline to be opened by a Programmable Logic Controller (PLC) to ignite the main burner of the non-ignition section.
The invention has the following technical effects: the condition interlocking in the ignition process of the cold furnace of the heating furnace can be realized, the automation degree of the ignition of the heating furnace is improved, the safety accidents of gas explosion, poisoning and the like caused by gas leakage in the ignition process of the heating furnace are effectively avoided, and meanwhile, the labor intensity of operators can be reduced, and the operation condition is improved.
Drawings
FIG. 1 is a control schematic diagram of a safety ignition control system for kinds of heating furnace burners;
FIG. 2 is a schematic structural diagram of an ignition section ignition unit of a safety ignition control system of heating furnace burners;
FIG. 3 is a main program block diagram of a safety ignition control system for kinds of heating furnace burners according to the invention;
in the figure: 1-a pressure valve, 2-a reset valve, 3-a flow regulating valve, 4-an ignition device, 5-a flame detector, 6-an ignition air pipeline, 7-an ignition gas pipeline, 8-a main gas pipeline, 9-a main air pipeline, 10-an induced draft fan, 11-a manual valve, 12-an ignition burner, 13-a main burner, 14-a purging electromagnetic valve and 15-a purging pipeline.
Detailed Description
The invention is further illustrated in the following description with reference to the drawings, but the invention is not limited in any way and any alterations or substitutions based on the teachings of the invention are within the scope of the invention.
The invention comprises a Programmable Logic Controller (PLC), a man-machine interaction touch display screen, a pressure valve, a reset valve, a flow regulating valve, an ignition device, a flame detector and a temperature detector, and is characterized in that: the PLC is arranged in the operation cabinet, the human-computer interaction touch display screen is arranged on the surface of a panel of the operation cabinet, the pressure valve, the reset valve and the flow regulating valve are arranged on an air pipeline and a gas pipeline, the ignition device and the flame detector are arranged near the burners of each ignition unit of the heating furnace, the temperature detector is arranged in a furnace hall of the heating furnace, and the PLC is respectively and electrically connected with the human-computer interaction touch display screen, the pressure valve, the reset valve, the flow regulating valve, the ignition device, the flame detector and the temperature detector.
The pressure valve comprises a main gas pipeline pressure valve, a main air pipeline pressure valve, an ignition gas pipeline pressure valve and an ignition air pipeline pressure valve, and the main gas pipeline pressure valve, the main air pipeline pressure valve, the ignition gas pipeline pressure valve and the ignition air pipeline pressure valve are respectively arranged on the main gas pipeline, the main air pipeline, the ignition gas pipeline and the ignition air pipeline; the reset valve comprises a main gas pipeline reset valve and an ignition gas pipeline reset valve, and the main gas pipeline reset valve and the ignition gas pipeline reset valve are respectively arranged on the main gas pipeline and the ignition gas pipeline and are positioned at the downstream of the gas supply flow direction of the pressure valve.
The main gas pipeline pressure valve and the main gas pipeline reset valve are respectively two and are respectively connected to the main gas pipeline in series.
The ignition gas pipeline pressure valve and the ignition gas pipeline reset valve are respectively two and are respectively connected in series with the ignition gas pipeline of each group of ignition units.
The flow control valve comprises a main gas pipeline flow control valve, a main air pipeline flow control valve, an ignition gas pipeline flow control valve and an ignition air pipeline flow control valve, wherein the main gas pipeline flow control valve, the main air pipeline flow control valve, the ignition gas pipeline flow control valve and the ignition air pipeline flow control valve are respectively arranged on the main gas pipeline, the main air pipeline, the ignition gas pipeline and the ignition air pipeline and are positioned at the downstream of the air supply flow direction of the reset valve.
And the air pipeline and the gas pipeline are both provided with manual valves, and the manual valves are positioned at the downstream of the air supply flow direction of the flow regulating valve.
The device is characterized by further comprising a purging electromagnetic valve, wherein the purging electromagnetic valve is arranged on a purging pipeline, and the Programmable Logic Controller (PLC) is electrically connected with the purging electromagnetic valve and the flue gate plate electric valve respectively.
And the programmable logic controller PLC is electrically connected with electromagnetic valves on branch gas pipelines and branch air pipelines of the non-ignition section.
A method for controlling safe ignition of burner of heating furnace includes receiving data information to be tested from sensor by PLC, setting up the data information according to preset program or man-machine interactive touch display screen, transmitting signal to actuator to control relative device to complete control procedure, and including the following steps:
1) preparing before ignition, checking that all equipment has safe operation conditions, and opening a manual valve;
2) purging control, (a) the Programmable Logic Controller (PLC) dispatches residual gas in the hearth by controlling a purging electromagnetic valve and a flue flashboard on a purging pipeline and utilizing nitrogen, wherein the purging time is set by a touch screen, and (b) the Programmable Logic Controller (PLC) dispatches the residual gas in the hearth by controlling an induced draft fan, a pressure valve and a flow regulating valve on an air pipeline, and the purging time is set by the touch screen;
3) ignition control, wherein a Programmable Logic Controller (PLC) controls to open an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline, and controls an ignition valve of an ignition device to ignite the mixed gas of an ignition nozzle;
4) ignition control is carried out on the ignition section, the flame detector detects that all the ignition burners are ignited, the Programmable Logic Controller (PLC) controls a main gas reset valve and a main gas flow regulating valve of the ignition section to be opened, and ignition of the main burners of the ignition section is finished through the ignition burners;
5) the igniter is controlled to be cut off, when the temperature detector detects that the temperatures of all ignition sections reach the self-ignition temperature, the Programmable Logic Controller (PLC) controls an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline to be closed, controls a draught fan and the ignition flow regulating valve on an ignition air pipeline to be closed, and cuts off the air and the gas of the ignition burner;
6) and (3) controlling ignition of the non-ignition section, and when the temperature detector detects that the furnace temperature of the non-ignition section reaches an auto-ignition temperature value, controlling a gas reset valve and a gas flow regulating valve on a branch gas pipeline of the non-ignition section to be opened by a Programmable Logic Controller (PLC) to ignite the main burner of the non-ignition section.
The coal gas reset valve is a manual-automatic dual-purpose valve.
The working process of the invention is as follows:
(1) the operator must check the combustion equipment to ensure that all equipment is operating properly and in safe operating conditions. The auxiliary system must operate normally (mainly referring to the supply of instrument air and cooling water), all gas valves in front of the burners are closed, and the manual valve is opened.
(2) And (3) starting a system, wherein the Programmable Logic Controller (PLC) automatically detects that the combustion air pressure (PSL valve) and the main gas pressure (PSL valve and PSH valve) are normal, the main gas reset valve (MRV valve) is closed, the ignition gas reset valve (MRV valve) is closed, the gas stop valve on the gas pipe network branch pipe is closed, the nitrogen purging electromagnetic valve is closed, and the PLC timer is normal.
(3) And (3) starting purging, and lighting a 'combustion interlock normal' lamp key on the field operation box when the conditions listed in the step (2) are met. The furnace is ready for a purge cycle when the "start purge" key on the operator box or HMI is pressed.
(4) And (2) performing purging, wherein the programmable controller PLC controls to open a flue gate and a purging electromagnetic valve, residual gas in the hearth is purged by using nitrogen, a purging timer starts to time, a purging lamp key on the control box starts to light, a nitrogen purging on-going display on the HMI lights to indicate that a nitrogen purging program in the furnace is going on, after the purging process lasts for 10 minutes (set time), the programmable controller PLC controls to close the purging electromagnetic valve, open each air flow regulating valve and open the valve to 80%.
(5) At the end of the purge time, a "purge end" ignition light on the control box is on and a "purge end" indicator light on the HMI is on.
(6) Ignition is started, the programmable logic controller PLC detects that the ignition air pressure (PSL valve) is normal and the ignition gas pressure (PSL valve and PSH valve) is normal, and the purging program is finished. At this time, the "ignition gas permission" lamp key on the control box and on the operation panel is turned on. The operator can turn on the ignition gas reset valve (MRV valve) through HMI (or manually).
(7) when the reset valve of igniting gas is on, the igniting nozzle on the igniting section can be ignited, and by rotating the ignition selection switch to start position, the igniting transformer is started to ignite (generate spark) to ignite the igniting nozzle.
(8) If the flame sensor does not detect that the ignition burner is ignited, the programmable logic controller PLC controls to automatically close an ignition gas reset valve (MRV valve), and the steps 6 to 7 are repeated until the ignition burner is ignited.
(9) The main burners of the ignition section are lit, and when all the ignition burners of a certain section are lit and the flame sensing element detects a flame, the "main gas enable" light key on the field operating box and on the operating panel will light up.
(10) And if the flame monitor detects that the main burner is not ignited within 10 seconds, the Programmable Logic Controller (PLC) controls the ignition gas reset valve and the main gas reset valve to be automatically closed. And repeating the steps 3 to 9 until all the burners on all the ignition sections are ignited.
(11) When stable flame is formed on the ignition section, the air and gas flow controllers of all sections can be set to a cascade control mode, the temperature controller is set to a manual mode, the furnace temperature is increased to 550 ℃ according to a specified temperature increasing speed, and the temperature controller can be set to an automatic mode at the moment; the temperature detector in the furnace chamber displays the temperature on the HMI panel in real time.
(12) When the temperature on the ignition section reaches the self-ignition temperature (760 ℃), the programmable logic controller PLC controls the ignition gas reset valve and the ignition gas flow regulating valve on the ignition gas pipeline to be closed, controls the induced draft fan and the ignition gas flow regulating valve on the ignition air pipeline to be closed, and cuts off the mixed gas of the ignition burner.
(13) The non-ignition section burner is ignited, and when the furnace temperature of the non-ignition section reaches the self-ignition temperature value (760 ℃), the 'gas-supporting allowing' lamp key on the field operation box and the HMI panel is lightened. An operator opens the electromagnetic valve on the branch gas pipe and the electromagnetic valve on the branch air pipeline through the HMI (or manually) to ignite the non-ignition section burner, and the whole heating furnace burner is ignited.
Claims (10)
- The heating furnace burner safety ignition control system is characterized in that the PLC is arranged in an operation cabinet, the human-computer interaction touch display screen is arranged on the surface of a panel of the operation cabinet, the pressure valve, the reset valve and the flow regulating valve are arranged on an air pipeline and a gas pipeline, the ignition device and the flame detector are arranged near each ignition unit burner of a heating furnace, the temperature detector is arranged in a furnace hall of the heating furnace, and the PLC is respectively electrically connected with the human-computer interaction touch display screen, the pressure valve, the reset valve, the flow regulating valve, the ignition device, the flame detector and the temperature detector.
- 2. The heating furnace burner safe ignition control system according to claim 1, characterized in that: the pressure valve comprises a main gas pipeline pressure valve, a main air pipeline pressure valve, an ignition gas pipeline pressure valve and an ignition air pipeline pressure valve, and the main gas pipeline pressure valve, the main air pipeline pressure valve, the ignition gas pipeline pressure valve and the ignition air pipeline pressure valve are respectively arranged on the main gas pipeline, the main air pipeline, the ignition gas pipeline and the ignition air pipeline; the reset valve comprises a main gas pipeline reset valve and an ignition gas pipeline reset valve, and the main gas pipeline reset valve and the ignition gas pipeline reset valve are respectively arranged on the main gas pipeline and the ignition gas pipeline and are positioned at the downstream of the gas supply flow direction of the pressure valve.
- 3. The heating furnace burner safe ignition control system according to claim 2, characterized in that: the main gas pipeline pressure valve and the main gas pipeline reset valve are respectively two and are respectively connected to the main gas pipeline in series.
- 4. The heating furnace burner safe ignition control system according to claim 2, characterized in that: the ignition gas pipeline pressure valve and the ignition gas pipeline reset valve are respectively provided with two valves and are respectively connected to the ignition gas pipelines of each ignition unit in series.
- 5. The heating furnace burner safe ignition control system according to claim 1, characterized in that: the flow control valve comprises a main gas pipeline flow control valve, a main air pipeline flow control valve, an ignition gas pipeline flow control valve and an ignition air pipeline flow control valve, wherein the main gas pipeline flow control valve, the main air pipeline flow control valve, the ignition gas pipeline flow control valve and the ignition air pipeline flow control valve are respectively arranged on the main gas pipeline, the main air pipeline, the ignition gas pipeline and the ignition air pipeline and are positioned at the downstream of the air supply flow direction of the reset valve.
- 6. The heating furnace burner safe ignition control system according to claim 1, characterized in that: and the air pipeline and the gas pipeline are both provided with manual valves, and the manual valves are positioned at the downstream of the air supply flow direction of the flow regulating valve.
- 7. The heating furnace burner safe ignition control system according to claim 1, characterized in that: the device is characterized by further comprising a purging electromagnetic valve, wherein the purging electromagnetic valve is arranged on a purging pipeline, and the Programmable Logic Controller (PLC) is electrically connected with the purging electromagnetic valve and the flue gate plate electric valve respectively.
- 8. The heating furnace burner safe ignition control system according to claim 1, characterized in that: and the programmable logic controller PLC is electrically connected with electromagnetic valves on branch gas pipelines and branch air pipelines of the non-ignition section.
- 9. The safe ignition control method for the burner of the heating furnace as claimed in claim 1, wherein: the reset valve is a manual-automatic dual-purpose valve.
- 10, kinds of heating furnace nozzle safe ignition control method, the control method is that the programmable logic controller PLC receives the data information to be measured that the sensor transmitted, according to the predetermined procedure or after being set up by the interactive touch display screen of man-machine, the signal is transmitted to the actuating mechanism, and then control the corresponding apparatus part action, finish the control process, characterized by that including the following step:1) preparing before ignition, checking that all equipment has safe operation conditions, and opening a manual valve;2) purging control, (a) the Programmable Logic Controller (PLC) dispatches residual coal gas in the coal gas pipeline network by controlling a purging electromagnetic valve and a flue flashboard on a purging pipeline and utilizing nitrogen, wherein the purging time is set by a touch screen, and (b) the Programmable Logic Controller (PLC) dispatches the residual coal gas in a hearth by controlling a draught fan, a pressure valve and a flow regulating valve of an air pipeline system, and the purging time is set by the touch screen;3) ignition control, wherein a Programmable Logic Controller (PLC) controls to open an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline, and controls an ignition transformer of an ignition device to ignite an ignition nozzle;4) ignition control is carried out on the ignition section, the flame detector detects that all the ignition burners are ignited, the Programmable Logic Controller (PLC) controls a main gas reset valve and a main gas flow regulating valve of the ignition section to be opened, and ignition of the main burners of the ignition section is finished through the ignition burners;5) the igniter is controlled to be cut off, when the temperature detector detects that the temperatures of all ignition sections reach the self-ignition temperature, the Programmable Logic Controller (PLC) controls an ignition gas reset valve and an ignition gas flow regulating valve on an ignition gas pipeline to be closed, controls a draught fan and the ignition flow regulating valve on an ignition air pipeline to be closed, and cuts off the mixed gas of the ignition burner;6) and (3) controlling ignition of the non-ignition section, and when the temperature detector detects that the furnace temperature of the non-ignition section reaches an auto-ignition temperature value, controlling a gas reset valve and a gas flow regulating valve on a branch gas pipeline of the non-ignition section and an electromagnetic valve on a branch air pipeline to be opened by a Programmable Logic Controller (PLC) to ignite the main burner of the non-ignition section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127694.4A CN110736107A (en) | 2019-11-18 | 2019-11-18 | Safety ignition control system and control method for heating furnace burners |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127694.4A CN110736107A (en) | 2019-11-18 | 2019-11-18 | Safety ignition control system and control method for heating furnace burners |
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| CN201911127694.4A Pending CN110736107A (en) | 2019-11-18 | 2019-11-18 | Safety ignition control system and control method for heating furnace burners |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336543A (en) * | 2020-03-06 | 2020-06-26 | 大峘集团有限公司 | Automatic ignition method for sintering flue gas denitration heating furnace |
| CN111604493A (en) * | 2020-06-19 | 2020-09-01 | 武汉钢铁有限公司 | Tundish baking protection system and method |
| CN111895778A (en) * | 2020-07-20 | 2020-11-06 | 湖南博一环保科技有限公司 | Method and device for reducing ring formation in pyrogenic process treatment of zinc-containing dust and sludge |
| CN114278962A (en) * | 2021-12-23 | 2022-04-05 | 重庆钢铁股份有限公司 | Heating furnace ignition safety protection method |
| CN114484464A (en) * | 2021-12-24 | 2022-05-13 | 张家港宏昌钢板有限公司 | Ignition safety switching device for gas diffusion tower and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336543A (en) * | 2020-03-06 | 2020-06-26 | 大峘集团有限公司 | Automatic ignition method for sintering flue gas denitration heating furnace |
| CN111604493A (en) * | 2020-06-19 | 2020-09-01 | 武汉钢铁有限公司 | Tundish baking protection system and method |
| CN111604493B (en) * | 2020-06-19 | 2021-12-07 | 武汉钢铁有限公司 | Tundish baking protection system and method |
| CN111895778A (en) * | 2020-07-20 | 2020-11-06 | 湖南博一环保科技有限公司 | Method and device for reducing ring formation in pyrogenic process treatment of zinc-containing dust and sludge |
| CN114278962A (en) * | 2021-12-23 | 2022-04-05 | 重庆钢铁股份有限公司 | Heating furnace ignition safety protection method |
| CN114484464A (en) * | 2021-12-24 | 2022-05-13 | 张家港宏昌钢板有限公司 | Ignition safety switching device for gas diffusion tower and use method thereof |
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