CN106970542B - A kind of visualization pyrolysis furnace charring state monitoring apparatus - Google Patents
A kind of visualization pyrolysis furnace charring state monitoring apparatus Download PDFInfo
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- CN106970542B CN106970542B CN201710187887.3A CN201710187887A CN106970542B CN 106970542 B CN106970542 B CN 106970542B CN 201710187887 A CN201710187887 A CN 201710187887A CN 106970542 B CN106970542 B CN 106970542B
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- tail gas
- burnt
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- tube
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/16—Preventing or removing incrustation
Abstract
The invention discloses a kind of visualization pyrolysis furnace charring state monitoring apparatus, it include the detection of gas with multiple constituents device for being mounted on control room, data processing and analysis device, terminal display device and the visualizing monitor device being mounted on pyrolysis furnace, multicomponent gas detection device acquires pyrolysis furnace charring tail gas, analyze tail gas concentration, output tail gas concentration to Data Analysis Services device；Visualizing monitor device acquires boiler tube infrared radiation signal, analyzes tube skin temperature, output furnace tube temperature to Data Analysis Services device；The Data Analysis Services device analysis burns tail gas concentration and tube skin temperature, and process is burnt in judgement, and output control decision burns control to control device execution is burnt, while exporting analysis and processing result to terminal display device.The present invention is using visualizing monitor device and burns tail gas concentration detection apparatus tracking burning process, monitoring focus layer reaction process, and raising burns effect, extends service using life.
Description
Technical field
The present invention relates to a kind of visualization pyrolysis furnace charring state monitoring apparatus, belong to petrochemical industry, and in particular to
To cracking of ethylene technology.
Background technique
Ethylene is important industrial chemicals, and ethylene industry horizontal reverse answers a national petrochemical industry strength.In ethylene
In refinery production, various second pyrolysis reactions are accompanied by addition to generating cracking of ethylene reaction in cracking furnace pipe.Second pyrolysis is anti-
Coking should can be formed in boiler tube inner wall, deepen coking degree with cracking severity and aggravate.Cracking furnace coking can reduce heat transfer efficiency,
Tube wall temperature increases, and easily forms hot spot aggregation, shortens boiler tube service life.Meanwhile coking causes boiler tube internal diameter to become smaller, material stream
Dynamic process pressure drop increases, and reduces yield of ethene.In real work, when tube wall temperature or pressure drop reach tolerance limit, cracking
Furnace just needs to stop production and burn.
The length of pyrolysis furnace charring time burns efficiency and directly affects the yield of ethylene, fuel consumption, boiler tube service life.Mesh
Before, the most of coke cleaning software package for all using famous foreign manufacturer in domestic ethylene plant carries out on-line decoking.Burn the default burning of program
Burnt time, usually 24 hours.In fact, cracking stock used by each ethylene plant is inconsistent, ingredient is unstable, and multiplicity is presented
Property, the situation of each tube coking is also different.If carrying out coke cleaning using same char length, it is slight to will cause certain cokings
Boiler tube excessively burn, waste the production time, cause boiler tube to damage, shorten the working life, the boiler tube more obstinate for coking
It is inadequate to will cause char length, burns and is not thorough, the next period can be shortened again by, which putting into production, starts char length, influences second
Alkene production.Therefore it is badly in need of a kind of device that the state of burning can be monitored in real time to realize visualization, the safety, height of ethane cracking furnace
Effect is thoroughly burnt.
Patent CN1282730C disclose it is a kind of be monitored online burn off coke process method, this method can monitor CO,
CO2Gas concentration changes although can monitor to a certain extent and burn both gas concentrations in tail gas, and this method exists
Following problems: without O in burning process2Content monitoring, can not grasp the chemical reaction rate of carbon and oxygen and burn CO in tail gas
With the volume content of CO2, that is, it is unable to control the heat of burning process release, showed to not can avoid boiler tube and hot-spot occur
As cannot ensure the safety of boiler tube.Secondly, entire boiler tube hotspot's distribution in burning process can not be obtained, it can not real-time tracking coke
Layer reaction process.
Article " ethane cracking furnace burns technical progress " describe it is various burn method, but be all famous foreign manufacturer
Software package, preset condition provide char length.Occur excessively to burn when coking that this method is slight there are boiler tube, when severe coking
Coke cleaning is not thorough again, and boiler tube is easily caused to damage, and device runing time shortens, and influences production efficiency.Meanwhile it being introduced in this article
The monitoring method for burning tail gas be manual sampling analysis, the analysis of general half an hour is primary, and information feedback time is at least at 2 hours
More than, can not real-time monitoring burn tail gas concentration situation of change, can not quickly make and burn control decision.
Summary of the invention
In order to make up prior art Shortcomings, the present invention provides a kind of visualization pyrolysis furnace charring status real time monitors
Device.During pyrolysis furnace charring, burns control device starting and burn program, visualizing monitor device real-time monitoring boiler tube temperature
Degree distribution and hot spot are mobile, and reaction process is burnt in tracking；Multi-Component Gas Analyzing device real-time measurement burns tail gas concentration；Data
Processing analytical equipment burns control device according to burning tail gas concentration and furnace tube temperature in real time and be distributed to make a policy to be sent to, and holds
Row burns control；Terminal display device real-time display boiler tube hot spot is mobile and burns the variation of tail gas concentration, is convenient for manual intervention,
To guarantee that burning process is steady, safe and efficient, thorough.
The technical solution adopted by the present invention is that:
A kind of visualization pyrolysis furnace charring status real time monitor device, it is characterised in that: include to be mounted on control room
Detection of gas with multiple constituents device, data processing and analysis device, terminal display device and the visualizing monitor being mounted on pyrolysis furnace
Device, the multicomponent gas detection device acquire pyrolysis furnace charring tail gas, analyze tail gas concentration, output tail gas concentration to data
Analysis processing device；The visualizing monitor device acquires boiler tube infrared radiation signal, analyzes tube skin temperature, exports boiler tube
Temperature is to Data Analysis Services device；The Data Analysis Services device analysis burns tail gas concentration and tube skin temperature, sentences
Disconnected to burn process, output control decision burns control to control device execution is burnt, while exporting analysis and processing result to terminal
Display device.
State monitoring apparatus is burnt in a kind of visualization, it is characterised in that: the detection of gas with multiple constituents device packet
Include sampling probe, tail gas pretreatment unit, signal generator, laser driving circuit, tunable laser, transmitting collimated light
Road, receives coupling optical path, detector, lock-in amplifier, data acquisition module, Data Analysis Services system, institute at gas absorption chamber
It states signal generator to generate the driving signal of tunable laser while reference signal is inputted lock-in amplifier, laser drives
The laser of dynamic circuit drives tunable laser transmitting enters gas absorption chamber after transmitting collimated light path collimation, and tail gas is located in advance
The gas that reason device adopts sampling probe is removed water, imports gas absorption chamber after dedusting, and laser passes through in gas absorption chamber
It crosses after multiple reflections to pass through and receives coupling optical path and detected by detector, detector signal enters lock-in amplifier and solved
It adjusts, the capture card of data acquisition module acquires demodulated signal, and demodulated signal carries out data processing by Data Analysis Services system
It is finally inversed by each component gas concentration.
State monitoring apparatus is burnt in a kind of visualization, it is characterised in that: the visualizing monitor device includes: red
Outer optical lens group, infrared optics optical filter, infrared detector, data collecting card, data processing and temperature retrieval system, it is described
Infrared optical lens group acquires infrared radiation signal, is detected after optically filtering by infrared detector, then by data collecting card
Acquisition is sent into after data processing is analyzed and processed with temperature retrieval system and exports tube skin temperature.
State monitoring apparatus is burnt in a kind of visualization, it is characterised in that: the multicomponent gas detection device is real
When on-line checking burn CO, CO in tail gas2And O2Percentage, according to CO, CO2、O2Levels analyze burning process, if
Surely control node is burnt；Hot spot is mobile inside visualizing monitor device real-time tracking boiler tube, is judged according to tube skin temperature burnt
Layer reaction process；According to burning tail gas levels and tube skin temperature variation comprehensive judgement burns state, control burn into
Journey, guarantee are burnt steady, safe, quick, thorough.
O in tail gas is burnt in the detection of multicomponent gas detection device real-time online2Percentage, controllable to burn heat release anti-
Rate is answered, prevents from reacting excessively fierce, temperature is excessively high, burns boiler tube.
The present invention has the advantage that compared with the prior art
1, Multi-Component Gas Analyzing device of the invention, can real-time monitoring burn CO, CO in tail gas2、O2Concentration become
Change, according to CO, CO2The concentration value of feedback that makes a policy burns control device.This is more quickly just than previous traditional sampling analysis
Victory obtains feedback information much sooner.O2Density real-time monitoring, whether state is burnt in judgement normal, avoids anoxic or anaerobic
It burns.Control O2Content can grasp carbon and O2Reaction rate, i.e. the heat that discharges in control burning process, to avoid furnace
There is hot-spot phenomenon in pipe, it is ensured that the safety of boiler tube.
2, visualizing monitor device of the invention, can obtain boiler tube hot spot situation of movement in real time, tracking burn react into
State is burnt in journey, acquisition.Terminal display device realizes furnace tube temperature and hot spot visualization, makes accordingly conducive to operator is burnt
Processing, improves the safety and completeness burnt.
Detailed description of the invention
Fig. 1 is present invention visualization pyrolysis furnace charring status real time monitor schematic device.
Fig. 2 is visualizing monitor schematic device.
Fig. 3 is Multi-Component Gas Analyzing schematic device.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that the described embodiment is only a part of the embodiment of the present invention, rather than whole embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.
Referring to Fig. 1, pyrolysis furnace charring status real time monitor device is visualized, includes the multicomponent gas for being mounted on control room
Body detection device 1, data processing and analysis device 3, terminal display device 4 and the visualizing monitor device being mounted on pyrolysis furnace 6
2, multicomponent gas detection device 1 acquires pyrolysis furnace charring tail gas, analyzes tail gas concentration, exports at tail gas concentration to data analysis
Manage device 3；Visualizing monitor device 2 acquires boiler tube infrared radiation signal, analyzes tube skin temperature, output furnace tube temperature to number
According to analysis processing device 3；Tail gas concentration and tube skin temperature are burnt in the analysis of Data Analysis Services device 3, and judgement is burnt
Process, output control decision burn control to the execution of control device 5 is burnt, while exporting analysis and processing result to terminal and showing dress
Set 4.
Pyrolysis furnace burns control device starting into after burning program, and tail gas is burnt in multicomponent gas monitoring device measurement
Middle CO, CO2、O2Concentration, visualizing monitor device measure cracking furnace tube Temperature Distribution, and monitoring boiler tube hot spot is mobile.Data processing
Analytical equipment is according to CO, CO2、O2Concentration variation and furnace tube temperature distribution make a policy generation to burning control device and execute burning
Coke control, such as: according to CO, CO2Node is burnt in concentration setting, is reduced or is increased dilution steam generation amount and air capacity, work as the two
Completion, O are burnt when the sum of concentration is less than 0.1%2Whether concentration carries out for monitoring to burn under aerobic state, avoids anoxic.It removes
Except this, O is controlled2Content, which can control, burns reaction rate, i.e., the energy released in control burning process, so that boiler tube be avoided to go out
Current situation portion superheating phenomenon, it is ensured that the safety of boiler tube.Terminal display device, which is shown, burns CO, CO in tail gas2、O2Concentration variation and furnace
Pipe hot spot is mobile, and comprehensive descision burns state, guarantees that burning process is safe and efficient, thorough.
Referring to fig. 2, visualizing monitor device includes: infrared optical lens group 7, infrared optics optical filter 8, infrared detector
9, data collecting card 10, data processing and temperature retrieval system 11.Infrared optical lens group 7 collects boiler tube infrared radiation signal,
It is detected after optically filtering by infrared detector 9, then is acquired by data collecting card 10 and obtain digital signal, be sent into data processing
Tube skin temperature and hot spot are exported after being analyzed and processed with temperature retrieval system 11.Boiler tube hot spot represents slagging point,
The present invention can get boiler tube hot spot mobile visualization image, in pyrolysis furnace charring initial stage hot spot in boiler tube upper section, with burn into
Row hot spot is in furnace in-pipe, until entire boiler tube burn through is saturating, it is complete to monitor whole process boiler tube hot spot trend.
Referring to Fig. 3, infrared multi-component gas controlling device includes: sampling probe 12, tail gas pretreatment unit 13, tunable
Laser 14, gas absorption chamber 16, receives coupling optical path 17, laser driving circuit 18, signal generation at transmitting collimated light path 15
Device 19, lock-in amplifier 20, detector 21, data acquisition module 22 and Data Analysis Services system 23.Firstly, in pyrolysis furnace
The bore of 20cm or so is issued in pipe tail portion, and sampling probe 12 is coupled and flow control is arranged.Burning tail gas, to enter tail gas pre-
Processing unit 13, the dry gas after water-dust removing enter gas absorption chamber 16, eliminate influence of the steam to measurement.Signal generator 19
Reference signal is inputted lock-in amplifier 20 simultaneously by the driving signal for generating tunable laser 14, and tunable laser 14 emits
Laser enters gas absorption chamber 16 by transmitting collimated light path 15, and gas-liquid separation and cooling device will burn tail gas and import gas suction
Receive room, laser receives coupling optical path 17 and is detected by detector 21 by passing through after multiple reflections, 21 signal of detector into
Enter lock-in amplifier 20 to be demodulated, the AD capture card of data acquisition module 22 acquires demodulated signal, and demodulated signal passes through data
Analysis process system 23 carries out data processing and is finally inversed by each component gas concentration.
Data processing and analysis device 3 is according to real-time CO, CO2、O3Concentration and furnace tube temperature distribution make a policy to be sent to and burn
Control device and execute burn control；4 real-time display boiler tube hot spot of terminal display device is mobile and burns CO, CO in tail gas2、
O3Concentration variation, comprehensive descision burns state, to guarantee that burning process is steady, safe and efficient, thorough.
Claims (1)
1. a kind of visualization pyrolysis furnace charring status real time monitor device, it is characterised in that: include to be mounted on cracking furnace exhaust gas
Detection of gas with multiple constituents device, data processing and analysis device, terminal display device on pipeline and be mounted on pyrolysis furnace can
Depending on changing monitoring device, the multicomponent gas detection device acquires pyrolysis furnace charring tail gas, analyzes tail gas concentration, and output tail gas is dense
It spends to Data Analysis Services device；The visualizing monitor device acquires boiler tube infrared radiation signal, analyzes tube skin temperature,
Furnace tube temperature is exported to Data Analysis Services device；The Data Analysis Services device analysis burns tail gas concentration and tube skin
Process is burnt in temperature, judgement, and output control decision burns control to control device execution is burnt, while exporting analysis and processing result
To terminal display device；
The detection of gas with multiple constituents device includes sampling probe, tail gas pretreatment unit, signal generator, laser driving electricity
Road, tunable laser, transmitting collimated light path, gas absorption chamber, reception coupling optical path, detector, lock-in amplifier, data are adopted
Collect module, Data Analysis Services system, the signal generator generates the driving signal of tunable laser, will refer to letter simultaneously
Number input lock-in amplifier, laser driving circuit drive tunable laser transmitting laser by transmitting collimated light path collimation
Enter gas absorption chamber afterwards, the gas that tail gas pretreatment unit adopts sampling probe is removed water, imports gas suction after dedusting
Room is received, laser, by being detected by receiving coupling optical path by detector after multiple reflections, detects in gas absorption chamber
Device signal enters lock-in amplifier and is demodulated, and the capture card of data acquisition module acquires demodulated signal, and demodulated signal passes through number
Data processing, which is carried out, according to analysis process system is finally inversed by each component gas concentration；
The visualizing monitor device includes: infrared optical lens group, infrared optics optical filter, infrared detector, data acquisition
Card, data processing and temperature retrieval system, the infrared optical lens group acquire infrared radiation signal, after optically filtering by
Infrared detector detection, then acquired by data collecting card, feeding data processing is analyzed and processed rear defeated with temperature retrieval system
Tube skin temperature out；
CO, CO2 and O2 percentage in tail gas are burnt in multicomponent gas detection device real-time online detection, according to CO,
CO2, O2 levels analyze burning process, and control node is burnt in setting；Heat inside visualizing monitor device real-time tracking boiler tube
Point movement, monitoring burn trend of the hot spot inside boiler tube under state, judge focus layer reaction process according to tube skin temperature；Root
According to tail gas levels are burnt and tube skin temperature variation comprehensive judgement burns state, process is burnt in control, and guarantee is burnt flat
Surely, safe, quick, thorough.
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| CN201710187887.3A CN106970542B (en) | 2017-03-27 | 2017-03-27 | A kind of visualization pyrolysis furnace charring state monitoring apparatus |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108803534A (en) * | 2018-07-23 | 2018-11-13 | 合肥金星机电科技发展有限公司 | Ethane cracking furnace burning process monitors system |
| CN108958195A (en) * | 2018-07-23 | 2018-12-07 | 合肥金星机电科技发展有限公司 | Ethane cracking furnace burning process control method |
| CN109540824B (en) * | 2018-12-05 | 2021-05-04 | 哈尔滨工业大学 | Visual test device for static and surface catalytic cracking coking |
| US11386530B2 (en) * | 2020-02-26 | 2022-07-12 | Flir Systems Ab | Digital filter for turbulence reduction and gas detection in thermal images |
| CN113964405A (en) * | 2021-10-11 | 2022-01-21 | 格林美（江苏）钴业股份有限公司 | Method for monitoring surface residual alkali concentration of high-voltage lithium cobalt oxide on line |
| CN115505415B (en) * | 2022-08-25 | 2023-09-22 | 江苏博颂能源科技有限公司 | Multidirectional closed detection unit for catalytic cracking pilot plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1155680C (en) * | 2002-03-12 | 2004-06-30 | 扬子石油化工股份有限公司 | Autocontrol method for in-line coke-removing procedure of cracking furnace |
| CN1282730C (en) * | 2003-07-30 | 2006-11-01 | 中国石油化工股份有限公司 | Methd for on-line monitoring coke burning-off process |
| CN101423453A (en) * | 2007-10-31 | 2009-05-06 | 中国石油化工股份有限公司 | Control method for accelerating on-line coke burning for industrial pyrolysis furnace |
| CN101872205B (en) * | 2009-04-27 | 2011-11-02 | 中国石油化工股份有限公司 | Automatic control method of online rapid decoking of cracking furnace |
| US9127211B2 (en) * | 2011-09-13 | 2015-09-08 | Sbt Technology, Inc. | Ethylene furnace decoking method |
| US9294213B2 (en) * | 2012-05-11 | 2016-03-22 | Intel Corporation | Packet data network connections for multi priority wireless devices |
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