CN110261313A - A kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line - Google Patents
A kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line Download PDFInfo
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- CN110261313A CN110261313A CN201910370907.XA CN201910370907A CN110261313A CN 110261313 A CN110261313 A CN 110261313A CN 201910370907 A CN201910370907 A CN 201910370907A CN 110261313 A CN110261313 A CN 110261313A
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- China
- Prior art keywords
- coke drum
- optical fiber
- chirp grating
- operation conditions
- based system
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Classifications
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- 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
- C10G55/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one refining process and at least one cracking process
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2418—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2698—Other discrete objects, e.g. bricks
Abstract
The invention discloses a kind of distributed optical fiber acoustic sensor-based systems for monitoring coke drum operation conditions on-line, including sequentially connected laser light source (1), isolator (2), optical circulator (3), multiple chirp grating acoustics sensor arrays (4), the output end of optical circulator (3) is also successively connect with signal processing unit (5), computer (6), and multiple chirp grating acoustics sensor arrays (3) are distributed in coke drum metal outer wall surface from top to bottom.The present invention realizes the on-line monitoring of STRENGTH ON COKE tower green coke and decoking process state, improves the degree of automation when measurement, eliminates security risk when manual work, improves work efficiency, reduce the labor intensity of worker.
Description
Technical field
The present invention relates to delayed coking unit detection technique fields, more specifically to a kind of on-line monitoring coke drum
The distributed optical fiber acoustic sensor-based system of operation conditions.
Background technique
Delayed coking is very important process procedure in current petroleum refining production process, and removes in coke drum and produce
Coke method be hydraulic decoking, its working principle is that being washed away using the impact force constant impingement coke inner wall of tower of high pressure water
Coke simultaneously makes it fall off, and the coke to fall off clears out of tower from the chute of bottom.Currently, in the production process of petrochemical industry,
The sound for listening water slug coke and tower wall by human ear by operator mostly, in conjunction with the coke in chute in observation tower bottom
Charcoal water judges whether coke is removed completely, this results in operator that the position for needing to devoke can not be accurately positioned, so that weight
It is high that burnt operating frequency is cut again, and working efficiency is relatively low.
External hydraulic decoking detection technique, which mainly has using tools such as tuning forks, at present is monitored, such monitoring technology
May determine that whether coke is cleared, but there is also certain difficulties for the measurement for layer thickness variation of focusing, since such technology belongs to
Electricity sensing measurement technology could be transmitted since the ultra-weak electronic signal that sensing generates has to pass through enhanced processing, it is necessary to from tower
The corresponding processing circuit of installation is immediated vicinity, and takes technological processing for explosion protection feature, not only cost is excessively high, and because of the harsh ring on tower
The long-term working stability in border, circuit system is poor, and accuracy of measurement is lower, limits technology oil refining enterprise at home
It promotes and applies.
In recent years, domestic Liang Jia enterprise also had developed the real-time monitoring system of decoking, their system passes through centainly
Mechanical structure and cooling method by tower wall vibration transmit and act on be evenly arranged on coking tower tower wall piezoelectric acceleration sense
Device, to obtain the vibration signal of tower wall during hydraulic decoking, the situation devoked during monitoring hydraulic decoking.Such sensor
It is lower to the sensitivity vibrated during hydraulic decoking, be typically only capable to monitor during hydraulic decoking coke it is whether cleared this
One switching value of sample, that is, monitor decoking it is clean whether, during cutting coke thickness of coke layer change measurement in terms of exist be stranded
It is difficult.
Currently, being applied in the industrial productions such as petrochemical industry, supervised using the artificial intelligence system of distributing optical fiber sensing
The process for surveying hydraulic decoking has not been reported at home, not only to consider measurement accuracy and measurement efficiency problem, while also to overcome
The problem of leading to security risk because of the system and device of installation at the scene.
Summary of the invention
To overcome defect of the existing technology, the present invention provides a kind of distribution for monitoring coke drum operation conditions on-line
Optical fiber acoustic sensor-based system.
The purpose of the present invention is achieved through the following technical solutions:
The present invention designs a kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line, including is sequentially connected
Laser light source, isolator, optical circulator, multiple chirp grating acoustics sensor arrays, the output end of optical circulator also successively with
Signal processing unit, computer connection, multiple chirp grating acoustics sensor arrays are distributed in coke drum metal outer wall from top to bottom
Surface.
In the above scheme, the chirp grating acoustics sensor array is ultra-low reflectance chirp grating acoustics sensor battle array
Column, reflectivity are lower than 0.4%.
In the above scheme, the surface of the chirp grating acoustics sensor array is coated with gold of the heatproof at 500 °C or more
Belong to layer.
In the above scheme, the length of the chirp grating acoustics sensor array is higher by 5 ± 0.5 than the froth bed limit for height of setting
Rice.
In the above scheme, the length of the chirp grating acoustics sensor array is 40 ± 1 meters.
In the above scheme, the spacing between adjacent chirp grating acoustics sensor array is 10 centimetres.
In the above scheme, the chirp grating that the chirp grating acoustics sensor array selects three dB bandwidth to be greater than 2nm.
In the above scheme, multiple chirp grating acoustics sensor arrays are fixed from top to bottom by high-temperature resistance adhesive
In coke drum outer wall.
In the above scheme, the chirp grating acoustics sensor array passes through optical fiber and the laser light being arranged in Master Control Room
Source is connected with signal processing unit.
Compared with prior art, the invention has the following advantages:
The present invention realizes the on-line monitoring of STRENGTH ON COKE tower green coke and decoking process state, improves the degree of automation when measurement, disappears
Security risk when except manual work, improves work efficiency, and reduces the labor intensity of worker.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of structural schematic diagram of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line.
In figure: light source 1, optical circulator 3, chirp grating acoustics sensor array 4, signal processing unit 5, calculates isolator 2
Machine 6.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.
As shown in Figure 1, the present invention provides a kind of distributed optical fiber acoustic sensing system for monitoring coke drum operation conditions on-line
System, which can monitor the height of coke and froth bed during coke drum green coke, coke becomes in tower in water conservancy decoking process
Change and cleared degree, the operation conditions of decoking device and fault condition, obtain the operation conditions of coke drum.
The system includes sequentially connected laser light source 1, isolator 2, optical circulator 3, multiple chirp grating acoustics sensors
Array 4, the output end of optical circulator 3 are also successively connect with signal processing unit 5, computer 6, multiple chirp grating acoustics sensors
Array 4 is distributed in coke drum metal outer wall surface.Light source 1, for issuing optical signal；Optical circulator 3, for transmitting optical signal
To chirp grating acoustics sensor array 4.
Chirp grating acoustics sensor array 4 has ultra-low reflectance；To guarantee that chirp grating acoustics sensor array 4 can be
(500 °C or more) normal use, surface metallization layer under high temperature；The length of chirp grating acoustics sensor array 4 compares coking
The froth bed limit for height of enterprise's setting is 5 ± 0.5 meters high, and most preferred length is 40 ± 1 meters.Adjacent chirp grating acoustics sensor array
Spacing between 4 is 10 centimetres, selects three dB bandwidth to be greater than the chirp grating of 2nm, to prevent grating to be adapted to；Multiple chirp gratings
Acoustics sensor array 4 is arranged in coke drum outer wall by high-temp glue from top to bottom；Chirp grating acoustics sensor array 4 passes through optical fiber
Be connected to the Master Control Room of enterprise, in Master Control Room laser light source and signal processing unit 5 be connected.
The light that laser light source 1 issues is by being distributed in multiple chirp grating acoustics sensor battle arrays on coke drum metal outer wall surface
Column 4 can pass through signal processing unit with the acoustic signal of inner wall different parts in real-time detection coke drum green coke and decoking process
The acoustical signal being collected into is changed into electric signal by 5, finally by artificial intelligence technology (chemical industry pipe of the building based on MLP neural network
Road monitoring model and chemical pipeline corrosion condition monitoring model based on LSTM neural network) detectable signal of acquisition (is instructed
Practice sample) it is analyzed, green coke coke in the process is obtained by being evenly arranged on the frequency signature signal of grating array of coke column overhead
The height of coke and froth bed in charcoal tower, the frequency of the grating array by being evenly arranged on coke drum waist, amplitude Characteristics signal obtain
The progress and cleared degree of coke in tower in water conservancy decoking process, supervised by the anomalous variation and disturbance of detectable signal frequency
Survey coke collapse the decoking devices failure such as burnt burying occur before characteristic parameter, the extent of corrosion of coke inner wall of tower etc., and with enterprise
Automatic control unit and administrative unit linkage, provide comprehensive technical parameter for the safety in production of coke drum and automation control.
The embodiment of the present invention is described in attached drawing, but the invention is not limited to above-mentioned specific embodiment parties
Formula, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are in this hair
Under bright enlightenment, without breaking away from the scope protected by the purposes and claims of the present invention, many forms can be also made, this
It is belonged within protection of the invention a bit.
Claims (9)
1. a kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line, which is characterized in that including successively
The laser light source (1) of connection, isolator (2), optical circulator (3), multiple chirp grating acoustics sensor arrays (4), optical circulator
(3) output end is also successively connect with signal processing unit (5), computer (6), multiple chirp grating acoustics sensor arrays (3)
It is distributed in coke drum metal outer wall surface.
2. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the chirp grating acoustics sensor array (4) is ultra-low reflectance chirp grating acoustics sensor array (4), reflection
Rate is lower than 0.4%.
3. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the surface of the chirp grating acoustics sensor array (4) is coated with metal layer of the heatproof at 500 °C or more.
4. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the length of the chirp grating acoustics sensor array (4) is 5 ± 0.5 meters higher than the froth bed limit for height of setting.
5. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the length of the chirp grating acoustics sensor array (4) is 40 ± 1 meters.
6. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the spacing between adjacent chirp grating acoustics sensor array (4) is 10 centimetres.
7. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the chirp grating acoustics sensor array (4) selects chirp grating of the three dB bandwidth greater than 2nm.
8. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that multiple chirp grating acoustics sensor arrays (4) are fixed on outside coke drum from top to bottom by high-temperature resistance adhesive
Wall.
9. the distributed optical fiber acoustic sensor-based system of on-line monitoring coke drum operation conditions according to claim 1, special
Sign is that the chirp grating acoustics sensor array (4) passes through at optical fiber and the laser light source and signal that are arranged in Master Control Room
Unit (5) are managed to be connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910370907.XA CN110261313A (en) | 2019-05-06 | 2019-05-06 | A kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line |
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| CN201910370907.XA CN110261313A (en) | 2019-05-06 | 2019-05-06 | A kind of distributed optical fiber acoustic sensor-based system for monitoring coke drum operation conditions on-line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147216A1 (en) * | 2020-01-21 | 2021-07-29 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber acoustic sensing system and signal processing method |
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|---|---|---|---|---|
| CN103256897A (en) * | 2013-04-19 | 2013-08-21 | 武汉理工大学 | Optical fiber sensing on-line monitoring system and method for hydraulic decoking operating state of petrochemical coking tower |
| CN106153482A (en) * | 2016-07-13 | 2016-11-23 | 武汉理工大学 | In a kind of hydraulic decoking process coke drum, focus layer hardness is distributed in provision of on-line analysis methodology |
| CN108775955A (en) * | 2018-07-18 | 2018-11-09 | 武汉理工大学 | A kind of petrochemical industry oil-gas pipeline corrosion state Fibre Optical Sensor on-line monitoring system |
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2019
- 2019-05-06 CN CN201910370907.XA patent/CN110261313A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256897A (en) * | 2013-04-19 | 2013-08-21 | 武汉理工大学 | Optical fiber sensing on-line monitoring system and method for hydraulic decoking operating state of petrochemical coking tower |
| CN106153482A (en) * | 2016-07-13 | 2016-11-23 | 武汉理工大学 | In a kind of hydraulic decoking process coke drum, focus layer hardness is distributed in provision of on-line analysis methodology |
| CN108775955A (en) * | 2018-07-18 | 2018-11-09 | 武汉理工大学 | A kind of petrochemical industry oil-gas pipeline corrosion state Fibre Optical Sensor on-line monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147216A1 (en) * | 2020-01-21 | 2021-07-29 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber acoustic sensing system and signal processing method |
| US11946799B2 (en) | 2020-01-21 | 2024-04-02 | Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences | Distributed fiber-optic acoustic sensing system and signal processing method using the same |
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| CB03 | Change of inventor or designer information |
Inventor after: Tong Xinglin Inventor after: Pan Xu Inventor after: Deng Chengwei Inventor after: Zhang Cui Inventor after: Mao Yan Inventor after: Yin Renjie Inventor after: Jin Qibing Inventor after: Pei Bingan Inventor before: Tong Xinglin Inventor before: Pan Xu Inventor before: Deng Chengwei Inventor before: Zhang Cui Inventor before: Mao Yan Inventor before: Yin Renjie |
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Effective date of registration: 20230421 Address after: Luoshi road in Hubei province Wuhan city Hongshan District No. 122 Applicant after: WUHAN University OF TECHNOLOGY Applicant after: BEIJING University OF CHEMICAL TECHNOLOGY Applicant after: LUOYANG PETROCHEMICAL ENGINEERING CORPORATION, SINOPEC Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Applicant before: WUHAN University OF TECHNOLOGY |
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