CN106566918A - A dual-fuel on-line switching monitoring system for a continuous acid-washing annealing furnace - Google Patents
A dual-fuel on-line switching monitoring system for a continuous acid-washing annealing furnace Download PDFInfo
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- CN106566918A CN106566918A CN201510649861.7A CN201510649861A CN106566918A CN 106566918 A CN106566918 A CN 106566918A CN 201510649861 A CN201510649861 A CN 201510649861A CN 106566918 A CN106566918 A CN 106566918A
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Abstract
A dual-fuel on-line switching monitoring system for a continuous acid-washing annealing furnace is provided. The system includes a plurality of heating zones. Each heating zone is independent in control of first fuel gas output and second fuel gas output. For each heating zone, a first fuel gas pipe for conveying a first fuel gas and a second fuel gas pipe for conveying a second fuel gas are provided, the first and second fuel gas pipes are separated from each other; a first nitrogen purging pipe is connected to a bypass of the first fuel gas pipe, and a second nitrogen purging pipe is connected to a bypass of the second fuel gas pipe. According to the system, two different fuel gases can be independently switched in different heating zones, thus making up demands of the annealing furnace on fuel gas using amounts, and exerting the highest production power of the annealing furnace. Through N2 safe purging and monitoring, possible safety risks caused by back fire of nozzles to fuel gas pipes can be effectively prevented, investment of a user and the production cost are reduced and the production efficiency of a continuous heating furnace is increased.
Description
Technical field
The present invention relates to continuous acid-washing annealing furnace and energy field, in particular it relates to continuous acid-washing annealing furnace double fuel
Online switching monitoring system.
Background technology
It is higher to demanded fuel in stainless steel sheet strip annealing furnace of continuous annealing unit, typically using liquefied petroleum gas or
The clean energy resourcies such as person's natural gas.Such as Application No. 200910258564.4, Publication No. 101792849A, name
Referred to as the Chinese patent literature of " vertical continuous annealing furnace ", discloses a kind of vertical continuous annealing furnace, including annealing
Pipe, inside is provided with heater, for providing predetermined annealing temperature environment to silk material；Lower cooling tube, is series at
The annealing pipe lower end, for cooling down to the silk material after annealing；Cooling system, is that annealing furnace and silk material provide cooling
Protection；Silk material gatherer, for the importing that silk material enters body of heater；Silk material let-off gear(stand), for silk material from body of heater
In derivation；Upper cooling tube, is series at the annealing pipe upper end, and its internal silk as the lower cooling tube
Cooling protection gas is connected with material passage, outside is provided with water-cooling wall；Correspondingly the cooling system is circulated including coolant
System and protection air cooling device.
Coke-stove gas is continuous in stainless steel hot band after purification and pressurized treatments as fuel derived from steel plant
Annealing furnace can be used directly, and current stainless steel hot band continuous annealing furnace has been promoted using coke-stove gas technology.Make
It is that cost is relatively low with the advantage of coke-stove gas, has the disadvantage that user is more, upstream supplies the instability of flow of coke-stove gas,
Supply frequent fluctuation, this is impacted for rustless steel continuous acid-washing annealing furnace consecutive production.
If continuous annealing furnace to be all changed to liquefied petroleum gas or natural gas, unit flame-out to annealing furnace is needed
Stop production and N is carried out to gas pipeline2Safety purge handover operation, usual N2Purge time in 4-5 hours or so,
Waste larger.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of continuous acid-washing annealing furnace double fuel is online
Switching monitoring system.
According to the present invention provide a kind of online switching monitoring system of continuous acid-washing annealing furnace double fuel, including it is multiple plus
Hot-zone, each thermal treatment zone exports to the first combustion gas and the control of the second combustion gas output is independent control；
It is provided with each thermal treatment zone：For conveying the first gas pipeline of the first combustion gas, for conveying second
Second gas pipeline of combustion gas；First gas pipeline is mutually isolated with the second gas pipeline；
First adjacent gas channel leads to and connects the first nitrogen sparge tube road, and the second adjacent gas channel leads to and connects the second nitrogen and blow
Sweep pipeline；The equal independent control of break-make in the first nitrogen sparge tube road and the second nitrogen sparge tube road, and the first nitrogen blows
Sweep pipeline mutually isolated with the second nitrogen sparge tube road.
Preferably, the first gas pipeline and the second gas pipeline switch online offer combustion gas, specifically, in annealing furnace
Any instant in the continuous course of work, the first gas pipeline, the second gas pipeline working condition it is as follows：
- the first gas pipeline exports the first combustion gas, and the shut-off of the second gas pipeline does not export the second combustion gas, the first nitrogen
Valve closing between purging pipeline and the first gas pipeline, the second nitrogen sparge tube road is conveyed to the second gas pipeline
Nitrogen is purged；Or
The shut-off of-the first gas pipeline does not export the first combustion gas, and the second gas pipeline exports the second combustion gas, the first nitrogen
Purging pipeline is purged to the first gas pipeline supplying nitrogen, the second nitrogen sparge tube road and the second gas pipeline it
Between valve closing.
Preferably, when annealing furnace stops production or shuts down, the first gas pipeline is just entered with the second gas pipeline using nitrogen
Row purging, specifically, the first gas pipeline, the second gas pipeline working condition it is as follows：
The shut-off of first gas pipeline does not export the first combustion gas, and the second gas pipeline is turned off and do not export the second combustion gas, and first
Nitrogen sparge tube road to the first gas pipeline supplying nitrogen is purged, and the second nitrogen sparge tube road is to the second Gas Pipe
Road supplying nitrogen is purged；
After the completion of nitrogen purging, the first gas pipeline and the switching of the second gas pipeline provide combustion gas, then annealing furnace weight
It is new to start working.
Preferably, the first combustion gas is coke-stove gas COG, and the second combustion gas is natural gas NG.
Preferably, including such as lower module：
COG remote control stations, the combustion gas for controlling the first gas pipeline is exported, the nitrogen in the first nitrogen sparge tube road
Gas output purging；
NG remote control stations, the combustion gas for controlling the second gas pipeline is exported, the nitrogen in the second nitrogen sparge tube road
Output purging；
COG remote control stations are connected to programmable logic controller (PLC) with NG remote control stations by fieldbus networks
On PLC, programmable logic controller (PLC) PLC is converted to IP/TCP latticed forms and is connected with HMI active stations by optical fiber.
Preferably, the supplying nitrogen is purged, specially：Purging instantaneous delivery is more than 60NM3/h、N2Purging
When pressure more than 30kpa.
Preferably, independent online real-time isolation monitoring is respectively arranged with the first gas pipeline, the second gas pipeline
Device；
The online isolation supervising device in real time, for entering to the purge flow rate of nitrogen, purge time, purging order
Row monitor in real time, it is ensured that the online gas pipeline of deactivation effectively can carry out purging displacement by the nitrogen of safety.
Preferably, there is manual and automatically controlled cut-out in each thermal treatment zone before and after the first gas pipeline, the second gas pipeline
Valve is separated.
Preferably, the online isolation supervising device in real time, including be respectively and independently arranged at the first nitrogen sparge tube road,
Nitrogen handss valve on second nitrogen sparge tube road, electromagnetic valve, check-valves, also including being respectively and independently arranged at the first combustion
Hand off valve, pneumatic cut-off valve on feed channel, the second gas pipeline, electromagnetic valve these effective isolating valves；
The online supervising device of isolation in real time also includes being respectively and independently arranged at the first nitrogen sparge tube road, the second nitrogen
Pressure transmitter and pressure switch on pipeline are swept in air-blowing, and with line real-time monitoring nitrogen pressure situation is isolated；If going out
Existing nitrogen pressure declines and then supplement nitrogen pressure and point out to process leak source, it is ensured that is safely and effectively isolated in and uses and standby
First combustion gas, the second combustion gas.
Compared with prior art, the present invention has following beneficial effect：
User is not being affected using the online switching monitoring system of continuous acid-washing annealing furnace double fuel provided according to the present invention
In the case of original system, can not shut down as needed at any time in a preference, do not stop production in the case of it is complete
Switch online into the combustion gas of the annealing furnace thermal treatment zone, in the case of can shutting down or stop production in another preference nitrogen is completed
Air-blowing sweep and combustion gas offline switching, and 2 kinds of different combustion gas are simultaneously in the thermal treatment zone combustion that annealing furnace is arbitrarily different
The mode of burning, makes up demand of the annealing furnace to gas consumption, plays annealing furnace maximum production capacity.
Simultaneously by the N in the present invention2Safety purge monitoring method passes through N the residual combustion gases in backup line2Purging
Burner hearth is entered by burner bypass, and guarantees safely and effectively to be isolated in use combustion different with standby 2 kinds by N2
Gas, once standby gas pipeline upward pressure meter is less than certain value, the then N on the standby gas pipeline2Electromagnetic valve is automatic
Open, carry out N2Pressurising is protected, and is reported to the police on monitored picture.So can effectively prevent burner to be tempered can
The security risk that can be brought to gas pipeline, reduces investment and the production cost of user, improves continuous furnace
Production efficiency.
Description of the drawings
The detailed description by reading non-limiting example made with reference to the following drawings, the further feature of the present invention,
Objects and advantages will become more apparent upon：
Fig. 1 is that the online switching control N2 of double fuel purges burner by-pass governing schematic diagram.
Fig. 2 is the online switching control N2 purging systems configuration figure of double fuel.
Fig. 3 is the online switching control N2 purgings monitoring flow chart of double fuel.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to those skilled in the art
Member further understands the present invention, but the invention is not limited in any way.It should be pointed out that the common skill to this area
For art personnel, without departing from the inventive concept of the premise, some deformations and improvement can also be made.These are belonged to
Protection scope of the present invention.
According to the online switching monitoring system of a kind of continuous acid-washing annealing furnace double fuel that the present invention is provided, including multiple thermals treatment zone,
Each thermal treatment zone exports to the first combustion gas and the control of the second combustion gas output is independent control；
It is provided with each thermal treatment zone：For conveying the first gas pipeline of the first combustion gas, for conveying the second combustion gas
The second gas pipeline；First gas pipeline is mutually isolated with the second gas pipeline；
First adjacent gas channel leads to and connects the first nitrogen sparge tube road, and the second adjacent gas channel leads to and connects the second nitrogen sparge tube
Road；The equal independent control of break-make in the first nitrogen sparge tube road and the second nitrogen sparge tube road, and the first nitrogen sparge tube road with
Second nitrogen sparge tube road is mutually isolated.
Preferably, the first combustion gas is coke-stove gas COG, and the second combustion gas is natural gas NG.
Preferably, including such as lower module：
COG remote control stations, the combustion gas for controlling the first gas pipeline is exported, the nitrogen in the first nitrogen sparge tube road is defeated
Go out purging；
NG remote control stations, export for controlling the combustion gas output of the second gas pipeline, the nitrogen in the second nitrogen sparge tube road
Purging；
COG remote control stations are connected to programmable logic controller (PLC) PLC with NG remote control stations by fieldbus networks
On, programmable logic controller (PLC) PLC is converted to IP/TCP latticed forms and is connected with HMI active stations by optical fiber.
Preferably, the supplying nitrogen is purged, specially：Purging instantaneous delivery is more than 60NM3/h、N2During purging
Pressure is more than 30kpa.
Preferably, independent online real-time isolation supervising device is respectively arranged with the first gas pipeline, the second gas pipeline；
The online isolation supervising device in real time, for carrying out reality to the purge flow rate of nitrogen, purge time, purging order
When monitor, it is ensured that the online gas pipeline of deactivation effectively can carry out purging displacement by the nitrogen of safety.
Preferably, have before and after the first gas pipeline, the second gas pipeline in each thermal treatment zone and enter with automatically controlled stop valve manually
Row cut-off.
Preferably, the online isolation supervising device in real time, including be respectively and independently arranged at the first nitrogen sparge tube road, the
Nitrogen handss valve, electromagnetic valve, check-valves on pipeline are swept in phenodiazine air-blowing, also including be respectively and independently arranged at the first gas pipeline,
Hand off valve, pneumatic cut-off valve on second gas pipeline, electromagnetic valve these effective isolating valves；
The online supervising device of isolation in real time also includes that being respectively and independently arranged at the first nitrogen sparge tube road, the second nitrogen blows
The pressure transmitter and pressure switch on pipeline is swept, nitrogen pressure situation is isolated with line real-time monitoring；If there is nitrogen pressure
Power declines and then supplement nitrogen pressure and point out to process leak source, it is ensured that be safely and effectively isolated in and the first standby combustion gas, the
Two combustion gas.
In a preference, the first gas pipeline and the second gas pipeline switch online offer combustion gas, specifically, are moving back
Any instant in the continuous course of work of stove, the first gas pipeline, the second gas pipeline working condition it is as follows：
- the first gas pipeline exports the first combustion gas, and the shut-off of the second gas pipeline does not export the second combustion gas, the first nitrogen purging
Valve closing between pipeline and the first gas pipeline, the second nitrogen sparge tube road to the second gas pipeline supplying nitrogen is carried out
Purging；Or
The shut-off of-the first gas pipeline does not export the first combustion gas, and the second gas pipeline exports the second combustion gas, the first nitrogen purging
Pipeline to the first gas pipeline supplying nitrogen is purged, the valve between the second nitrogen sparge tube road and the second gas pipeline
Close.
In another preference, when annealing furnace stops production or shuts down, the first gas pipeline and the second gas pipeline are just utilized
Nitrogen is purged, specifically, the first gas pipeline, the second gas pipeline working condition it is as follows：
The shut-off of first gas pipeline does not export the first combustion gas, and the shut-off of the second gas pipeline does not export the second combustion gas, the first nitrogen
Purging pipeline is purged to the first gas pipeline supplying nitrogen, and the second nitrogen sparge tube road is to the second gas pipeline delivery of nitrogen
Gas is purged；
After the completion of nitrogen purging, the first gas pipeline and the switching of the second gas pipeline provide combustion gas, and then annealing furnace is opened again
Beginning work.
More specifically, as shown in figure 1, the online switching monitoring of continuous acid-washing annealing furnace double fuel provided according to the present invention
In system, burner controller BCU460 is used for according to different combustion gas patterns, realizes to different fuel burner nozzle electromagnetic valves in point
Open and close controlling function when fiery；In coke-stove gas (COG) and the N of natural gas (NG)2Safety purge is isolated online
When, by-pass governing function can be carried out to the fuel burner nozzle electromagnetic valve before burner.
Normal ignition or igniting success after, burner controller BCU460 according to combustion gas pattern (coke-stove gas pattern or
Person's natural gas pattern) can be in controlled output terminal (pin 12 of BCU460) 220V voltages.Now COG bypasses relay
Device KA2, NG bypass relay KA4, COG pipeline N2Purging relay KA3 and NG pipeline N2 purging relay KA5
Will not energized action.
In COG pipeline N2During safety purge, the fuel burner nozzle electromagnetic valve before burner can be by relay KA2 and KA3 simultaneously
Obtaining electric combination control carries out bypass opening, and then electromagnetic valve KA7 before NG pipeline mouths is effectively spaced apart；
In NG pipeline N2 safety purges, electromagnetic valve can simultaneously obtain electric combination by relay KA4 and KA5 before burner mouth
Control carries out bypass opening, and then electromagnetic valve KA6 before COG pipeline mouths is effectively spaced apart.
As shown in Fig. 2 in the online switching monitoring system of the continuous acid-washing annealing furnace double fuel, its hardware system adopts mould
Massing and network structure, for each thermal treatment zone N2Nitrogen handss valve, electromagnetic valve, check-valves on purging pipeline, and
The valve such as COG pipelines and the manual of NG pipelines, pneumatic cut-off valve, flow control valve, and pressure transmitter and pressure opens
Close separate, the instrumentation of identical category has interchangeability again, it is contemplated that double fuel continuous annealing furnace control device energy
Effectively distinguish and can be managed collectively, whole online monitoring system adopts collecting and distributing type network structure, is divided into COG long-range
Control station and NG remote control stations, are hung between remote control station by Siemens's local bus profibus-OP network
On S7-300PLC, PLC is converted to IP/TCP latticed forms and is connected with HMI (man machine interface) active stations further through optical fiber.
Data-interface such as N between former annealing furnace unit control system2The online switching of purging is allowed, N2Purging request, N2Blow
Sweep and the information such as complete and be directly connected to by I/O patterns.This ensure that former ABB AC450DCS systems need not be carried out larger
Change, the online switching monitoring system of new double fuel it is again relatively independent, and Rapid Implementation and can maintain easily, for
Reduce equipment investment, improve production efficiency and there is definite meaning.
As shown in figure 3, in the online switching monitoring system of the continuous acid-washing annealing furnace double fuel, the combustion gas of each thermal treatment zone
Switching N2Purging functional software can Rapid transplant, autgmentability is strong, for any thermal treatment zone, can be in transmission side and operation
Before the burner mouth of side in the by-pass governing of electromagnetic valve, can be according to user's technological requirement, combination in any, and in order to consider N2
The safety that safety purge combustion gas switches online, it is necessary to assure purging instantaneous delivery is more than 60NM3/h、N2Pressure during purging
More than 30kpa, each technique N2Purge time ensure, and N when debugging2Purging carries out pipe gas detonation after finishing
Test guarantees that the gas pipeline and standby gas pipeline of work is full of N2, carry out effective, security isolation.
The safety of operation, N are considered simultaneously2Online switching must according to system suggestion require to be operated for purging combustion gas, keep away
The hidden danger that fault-avoidance maloperation brings.
In the online switching monitoring system of the continuous acid-washing annealing furnace double fuel, man-machine monitored picture adopts Wonderware
The Chinese editions of InTouch 9.5 are developed, and screen resolution is 1092X1080, are 1000 millis with PLC communication refreshing frequencys
Second.Man-machine interaction monitoring picture totally 9 width picture.N when the main combustion gas including the area of the thermal treatment zone 1 to 8 switches online2Purging
The step of and purging parameter such as N2Purging state, N2The prompting of purge operations step, N2Purge flow rate and integrated flow, N2
Electromagnetic valve state before purge time and coke oven gas pipe and natural gas line mouth.Simultaneously human-computer exchange picture is also provided with
1st area is heated to historical trends such as pressure, N2 purge flow rates in the gas pipeline in 8th area of heating.Last human-machine interaction picture is also
It is provided with history to report to the police and current alerts.By friendly human-computer interaction interface, operator are carried out next step operate into
The friendly prompting of row, for switching after various information carry out on-line real-time measuremen, and accident alarming can be carried out in time
Prompting is processed.
In a preferred embodiment, in certain acid-washing stainless steel continuous annealing furnace, 4 bringing-up sections are had,
Each bringing-up section includes 2 thermals treatment zone, totally 8 thermals treatment zone, in the 1st thermal treatment zone to the 6th thermal treatment zone, has per area
18 burners, transmission side 9, fore side 9；In the 7th thermal treatment zone to the 8th thermal treatment zone, per area 9 burnings are had
Mouth, transmission side 5, fore side 4,126 burners altogether, due to employing double fuel again, each burner is wrapped again
Include before coke-oven coal valve electromagnetic valve before electromagnetic valve and natural valve.
After being transformed, each computer heating control area is mounted with 2 sets of gas pipelines (for coke-stove gas and natural gas line),
The respective independent nitrogen purging displacement apparatus of 2 kinds of Gas Pipeline Designs, and the online real-time isolation monitoring of 2 kinds of combustion gas
Device.
Nitrogen is connected to the nitrogen purging displacement apparatus of gas pipeline the gas pipeline in each computer heating control area of annealing furnace, if
Put purge flow rate, purge time, purging order, it is ensured that the online gas pipeline of deactivation effectively can be entered by the nitrogen of safety
Row purging displacement.
Have before and after each thermal treatment zone gas pipeline and separated with automatically controlled stop valve manually.
Combustion gas isolates in real time online supervising device and is provided with nitrogen handss valve, electromagnetic valve, check-valves, and fuel gas pipeline it is manual,
The effectively isolating valve such as pneumatic cut-off valve, electromagnetic valve, and arrange pressure transmitter and pressure switch on line real-time monitoring every
From nitrogen pressure situation.Once occurring being automatically replenished nitrogen pressure if declining and point out to process leak source, it is ensured that safely and effectively every
From with 2 kinds of standby different combustion gas.
Meanwhile, two kinds of combustion gas are effectively isolated by nitrogen, the wind for preventing burner tempering from may bring to gas pipeline
Danger.
Originally annealing furnace control system is using ABB special AC450RMC series of PLC, and it is remote that scene is provided with S800I/O
Cheng Zhandian totally 14 websites.
In order to not affect system loading, network structure and the operation conditions of former control system, shutdown furnace outage time is dropped to most
It is low, for N2The requirement that safety purge, combustion gas are effectively isolated, double fuel is switched fast online, using it is reliable and stable,
The Siemens S7-300 PLC of technology maturation be control core, grind magnificent industrial computer be host computer active station monitoring scheme,
For coke-stove gas and natural gas are respectively provided with 1 set of independent ET200M remote control station, so for the same thermal treatment zone
Two kinds of combustion gas are effectively isolated, and save improvement cost and are all of great importance.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned spy
Determine embodiment, those skilled in the art can within the scope of the claims make a variety of changes or change, this not shadow
Ring the flesh and blood of the present invention.In the case where not conflicting, the feature in embodiments herein and embodiment can be any
It is mutually combined.
Claims (9)
1. the online switching monitoring system of a kind of continuous acid-washing annealing furnace double fuel, it is characterised in that including multiple heating
Area, each thermal treatment zone exports to the first combustion gas and the control of the second combustion gas output is independent control；
It is provided with each thermal treatment zone：For conveying the first gas pipeline of the first combustion gas, for conveying the second combustion gas
The second gas pipeline；First gas pipeline is mutually isolated with the second gas pipeline；
First adjacent gas channel leads to and connects the first nitrogen sparge tube road, and the second adjacent gas channel leads to and connects the second nitrogen sparge tube
Road；The equal independent control of break-make in the first nitrogen sparge tube road and the second nitrogen sparge tube road, and the first nitrogen sparge tube road with
Second nitrogen sparge tube road is mutually isolated.
2. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to claim 1, its feature exists
Switch offer combustion gas online in, the first gas pipeline and the second gas pipeline, specifically, in the continuous course of work of annealing furnace
In any instant, the first gas pipeline, the second gas pipeline working condition it is as follows：
- the first gas pipeline exports the first combustion gas, and the shut-off of the second gas pipeline does not export the second combustion gas, the first nitrogen purging
Valve closing between pipeline and the first gas pipeline, the second nitrogen sparge tube road to the second gas pipeline supplying nitrogen is carried out
Purging；Or
The shut-off of-the first gas pipeline does not export the first combustion gas, and the second gas pipeline exports the second combustion gas, the first nitrogen purging
Pipeline to the first gas pipeline supplying nitrogen is purged, the valve between the second nitrogen sparge tube road and the second gas pipeline
Close.
3. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to claim 1, its feature exists
In when annealing furnace stops production or shuts down, the first gas pipeline is just purged with the second gas pipeline using nitrogen, specifically
Ground, the first gas pipeline, the second gas pipeline working condition it is as follows：
The shut-off of first gas pipeline does not export the first combustion gas, and the shut-off of the second gas pipeline does not export the second combustion gas, the first nitrogen
Purging pipeline is purged to the first gas pipeline supplying nitrogen, and the second nitrogen sparge tube road is to the second gas pipeline delivery of nitrogen
Gas is purged；
After the completion of nitrogen purging, the first gas pipeline and the switching of the second gas pipeline provide combustion gas, and then annealing furnace is opened again
Beginning work.
4. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to any one of claim 1 to 3
System, it is characterised in that the first combustion gas is coke-stove gas COG, the second combustion gas is natural gas NG.
5. the online switching monitoring system of continuous acid-washing annealing furnace double fuel stated according to claim 4, it is characterised in that
Including such as lower module：
COG remote control stations, the combustion gas for controlling the first gas pipeline is exported, the nitrogen in the first nitrogen sparge tube road is defeated
Go out purging；
NG remote control stations, export for controlling the combustion gas output of the second gas pipeline, the nitrogen in the second nitrogen sparge tube road
Purging；
COG remote control stations are connected to programmable logic controller (PLC) PLC with NG remote control stations by fieldbus networks
On, programmable logic controller (PLC) PLC is converted to IP/TCP latticed forms and is connected with HMI active stations by optical fiber.
6. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to any one of claim 1 to 3
System, it is characterised in that the supplying nitrogen is purged, specially：Purging instantaneous delivery is more than 60NM3/h、N2Blow
Pressure is more than 30kpa when sweeping.
7. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to any one of claim 1 to 3
System, it is characterised in that independent online real-time isolation monitoring is respectively arranged with the first gas pipeline, the second gas pipeline
Device；
The online isolation supervising device in real time, for carrying out reality to the purge flow rate of nitrogen, purge time, purging order
When monitor, it is ensured that the online gas pipeline of deactivation effectively can carry out purging displacement by the nitrogen of safety.
8. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to any one of claim 1 to 3
System, it is characterised in that have manual and automatically controlled cut-out in each thermal treatment zone before and after the first gas pipeline, the second gas pipeline
Valve is separated.
9. the online switching monitoring system of continuous acid-washing annealing furnace double fuel according to claim 7, its feature exists
In the online isolation supervising device in real time blows including the first nitrogen sparge tube road, the second nitrogen is respectively and independently arranged at
Sweep nitrogen handss valve, electromagnetic valve, the check-valves on pipeline, also including be respectively and independently arranged at the first gas pipeline, second combustion
Hand off valve, pneumatic cut-off valve in feed channel, electromagnetic valve these effective isolating valves；
The online supervising device of isolation in real time also includes that being respectively and independently arranged at the first nitrogen sparge tube road, the second nitrogen blows
The pressure transmitter and pressure switch on pipeline is swept, nitrogen pressure situation is isolated with line real-time monitoring；If there is nitrogen pressure
Power declines and then supplement nitrogen pressure and point out to process leak source, it is ensured that be safely and effectively isolated in and the first standby combustion gas, the
Two combustion gas.
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| CN201510649861.7A CN106566918A (en) | 2015-10-09 | 2015-10-09 | A dual-fuel on-line switching monitoring system for a continuous acid-washing annealing furnace |
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| CN110723901A (en) * | 2019-09-29 | 2020-01-24 | 法尔胜泓昇集团有限公司 | Automatic centering and cleaning device for lining pipe of optical fiber annealing furnace and implementation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109298726A (en) * | 2018-09-29 | 2019-02-01 | 青海盐湖工业股份有限公司 | The method and system that a kind of pair of EDC pyrolysis furnace is heated |
| CN109298726B (en) * | 2018-09-29 | 2022-01-28 | 青海盐湖工业股份有限公司 | Method and system for heating EDC cracking furnace |
| CN110723901A (en) * | 2019-09-29 | 2020-01-24 | 法尔胜泓昇集团有限公司 | Automatic centering and cleaning device for lining pipe of optical fiber annealing furnace and implementation method thereof |
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Application publication date: 20170419 |