CN109282874A - Continuous material level detection system based on cracking still - Google Patents
Continuous material level detection system based on cracking still Download PDFInfo
- Publication number
- CN109282874A CN109282874A CN201811454687.0A CN201811454687A CN109282874A CN 109282874 A CN109282874 A CN 109282874A CN 201811454687 A CN201811454687 A CN 201811454687A CN 109282874 A CN109282874 A CN 109282874A
- Authority
- CN
- China
- Prior art keywords
- cracking still
- radioactive source
- level detection
- detection system
- continuous material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/288—X-rays; Gamma rays or other forms of ionising radiation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses the continuous material level detection systems based on cracking still, including radioactive source, cracking still level-sensing device and DCS control system；The radioactive source is arranged in built-in pipe, and the built-in pipe is located on the inside of cracking still, and arranges along the axial direction of cracking still；The cracking still level-sensing device includes radioactive source receiver and data processing transmitter, and the output end of the radioactive source receiver is electrically connected with the input terminal of data processing transmitter；The DCS control system includes analog input fastener, controller and operator station, the input terminal of the analog input fastener is electrically connected with the output end of data processing transmitter by signal-transmitting cable, and the output end of the analog input fastener is electrically connected with the input terminal of controller.The present invention solve the problems, such as to penetrate source energy it is small can not complete penetration cracking still measure, while avoiding interference of the equipment internals to measurement, guarantee the precise measurement of material position.
Description
Technical field
The present invention relates to continuous material level field of measuring technique, more particularly to the continuous material level detection system based on cracking still.
Background technique
Important equipment of the cracking still as Chemical Manufacture, material position are that judgement disengaging material and the extent of reaction are very important
One parameter, but cracking still itself has structures and a measures such as stirring, heat tracing coil pipe, steam jacket, baffle plate and heat preservation, in kettle
It is chemically reacted with high temperature endothermic, and media property uncertain (such as dielectric constant, density attribute, dependent on cracking in kettle
Degree) the features such as, these factors can all influence the accurate measurement of material position.
Currently, leading to tradition since the uncertainty of Media density in kettle and pressure tappings often will appear fouling and clogging
Differential pressure type principle level-sensing device be unable to measure；And the needs such as capacitance material level meter, radio frequency admittance level-sensing device, floating drum level-sensing device are protruded into and are set
Standby interior and media contact carries out level measurement, and since medium will appear bridging phenomenon in kettle, these level-sensing devices can not solve bridging
Bring influences so can not accurately measure；It is finally the radar level gauge measured according to reflection of electromagnetic wave principle, by
The media such as hydro carbons, alkanes can absorb most electromagnetic wave in being usually in kettle, therefore reflecting effect is bad causes radar can not
Measurement well.
To sum up most cracking still level measurement uses nuclear radiation burden level meter to factor at present, and mainly penetrating source is Cs137 and Co60,
Although this scheme can accurately carry out cracking still level measurement, such nuclear radiation burden level meter need special equipment transport,
Installation and processing radioactive source；It needs dedicated field of employment and uses licensing；Need a large amount of safeguard measure close to limit
Radiological installation；Installation and maintenance needs trained professional；It needs to limit the working time, formulate special operation rule
Model, and careless slightly can all cause personal injury and environmental pollution.There are also this level-sensing device penetrate source and receiver is respectively mounted
Influence of all internals to measurement on transmission path must be considered in equipment outer wall, therefore when calibration.
Summary of the invention
Technical problems based on background technology, the invention proposes the continuous material level detection system based on cracking still,
Solve the problems, such as to penetrate source energy it is small can not complete penetration cracking still measure, while avoiding equipment internals and measurement done
It disturbs, guarantees the precise measurement of material position, in turn avoid pollution of the nuclear radiation source to environment, improve maintainability, also save into
This.
Continuous material level detection system proposed by the present invention based on cracking still, including radioactive source, cracking still level-sensing device and DCS
Control system；
The radioactive source is arranged in built-in pipe, and the built-in pipe is located on the inside of cracking still, and along cracking still
Axial arrangement；
The cracking still level-sensing device includes radioactive source receiver and data processing transmitter, the radioactive source receiver installation
On outer wall of the cracking still far from radioactive source side, radioactive source receiver is connected through a screw thread with cracking still outer wall, the radiation
The output end of source receiver is electrically connected with the input terminal of data processing transmitter；
The DCS control system includes analog input fastener, controller and operator station, the analog input fastener
Input terminal be electrically connected with the output end of data processing transmitter by signal-transmitting cable, the analog input fastener it is defeated
Outlet is electrically connected with the input terminal of controller, and the output end of the controller is electrically connected with the input terminal of operator station display.
Preferably, the radioactive source is Na-22.
Preferably, the built-in pipe is DN80 pipeline, top DN80 blind plate sealing.
Preferably, the radioactive source is two, and described two radioactive sources are equally divided into 21 parts.
Preferably, the data processing transmitter converts the quantity of X-rays X that radioactive source receiver receives to the mould of 4-20mA
Analog quantity signal.
Preferably, the quantity of the receiver is 2.
Compared with prior art, the beneficial effects of the present invention are:
1, Na-22 radioactive source State immunity is not supervised, so not having to special transport and management.Radioactive source is safety collar
Guarantor's type, so it goes without doing any safeguard procedures.Radioactive source is no more than 20KG, installation, disassembly and processing plus protective shell weight
It is very convenient thus do not have to reserve special spatial channel；
It 2, is more than 3 meters for cracking still diameter, structure is complicated (including stirring, baffle plate and upper and lower ring pipe etc.) in kettle,
Using plug-type measurement scheme, a reasonable send-receive path is selected, low activity can be solved perfectly and penetrate source in kettle
Meaningless energy loss thereby may be ensured that measurement accuracy；
3, with good economy and applicability: a, have exempt qualification, without handling radiation safety licensing, also without
It needs dedicated radioactive source storehouse and handles environmental impact assessment, checks and accepts formality；B, using unit without establishing radioactive source management organization and management body
System, maintenance personnel is without obtaining radiation working credential；C, using unit without purchasing protective garment, radiation detector and individual
Radiation dosimeter etc., without the monitoring system for installing mandatory and public security monitoring network internet；D, without carrying out scrapping the source of penetrating
Special disposition；To reduce using link, requirement is reduced, many economic costs are saved.
Detailed description of the invention
Fig. 1 is that the radiation source of the continuous material level detection system proposed by the present invention based on cracking still and radioactive source receiver are pacified
Holding position schematic diagram；
Fig. 2 be the continuous material level detection system proposed by the present invention based on cracking still radiation source and radioactive source receiver it
Between ray route map；
Fig. 3 is the circuit block diagram of the continuous material level detection system proposed by the present invention based on cracking still；
Fig. 4 is the principle of the data processing transmitter of the continuous material level detection system proposed by the present invention based on cracking still
Figure.
Fig. 5 is the ai board schematic diagram of the continuous material level detection system proposed by the present invention based on cracking still.
Fig. 6 is the schematic diagram of the DCS controller of the continuous material level detection system proposed by the present invention based on cracking still.
In figure: 1- cracking still, 2- built-in pipe, 3- radioactive source, 4- radioactive source receiver.
Specific embodiment
Combined with specific embodiments below the present invention is made further to explain.
With reference to Fig. 1-3, the continuous material level detection system proposed by the present invention based on cracking still, including radioactive source, cracking still
Level-sensing device and DCS control system；The radioactive source is arranged in built-in pipe, and built-in pipe is DN80 pipeline, uses at the top of pipeline
DN80 blind plate sealing, the built-in pipe are located on the inside of cracking still, and arrange along the axial direction of cracking still；The cracking still material position
Meter includes radioactive source receiver and data processing transmitter, and the radioactive source receiver is mounted on cracking still far from radioactive source side
Outer wall on, radioactive source receiver is connected through a screw thread with cracking still outer wall, the output end and data of the radioactive source receiver
The input terminal electrical connection of transmitter is handled, data processing transmitter is mounted on the position operated convenient for patrol officer with channel steel bracket
It sets, radioactive source and receiver correspond；The DCS control system includes analog input fastener, controller and operator station,
The input terminal of the analog input fastener is electrically connected with the output end of data processing transmitter by signal-transmitting cable, described
The output end of analog input fastener is electrically connected with the input terminal of controller, and the output end and operator station of the controller are shown
The input terminal of device is electrically connected；The distance between radioactive source receiver and radioactive source are 2600mm, and radioactive source and radioactive source receive
Barrier is not present on the straight line of device connection.
The radioactive source receiver of the application is mainly made of organic plastics scintillation crystal, photomultiplier tube, electronic component,
Middle electronic component mainly includes voltage amplifier and emitter-follower, is used to amplified signal voltage and power, and make photomultiplier transit
The output impedance of pipe is matched with the transmission cable being connect；The working principle of radioactive source receiver is logical by detection ionising radiation
Amount, and electrical impulse frequency signal is converted by the optical signal of generation；Due to the limitation of organic plastics scintillation crystal, receiver one
As be no more than two meters.
With reference to Fig. 4, the effect of data processing transmitter is available with existing letter between pulse frequency and output signal
A series of pulse signal of input processing blocks is transformed into normalized current output according to input pulse average frequency by number relationship
Signal.Process block assembles power-on timer and insulation operation interface, and has dust-proof/waterproof/fire prevention/explosion-proof characteristic (IP65 guarantor
Protect grade).
With reference to Fig. 5, the effect of analog input fastener is the binary number that standard current signal is become to controller cognition
Word amount data flow, controller requires to be converted into material position information according to configuration, and shows in operator station.
With reference to Fig. 6, DCS controller is made of command register, command decoder and operation three components of controller, according to
The program that user finishes in advance successively takes out each item instruction from memory, is placed in command register, passes through Instruction decoding point
Analysis is it is determined that any operation carried out, then by operation controller, by determining timing, to the sending microoperation of corresponding component
Signal is controlled, some analogs are universal with computer CPU.
Radioactive source of the invention uses safe Na22, and range is that 4m needs 2 penetrate source, and 2 sources are equally divided into
21 parts, every part of exit dose 90kbq, the total amount of radiation is 90kbq × 21=1890kbq, wherein the exit dose in each source is
945kbq is less than national standard 1 × 103Kbq belongs to V class radioactive source, is lower than standard GB/T 18871-2002 " ionising radiation
Protection and the safe basic standard of radiation source " penetrate source to exempt class source, to human body without direct injury, no pollution to the environment.2, by
Reach 3200mm, internal structure complexity in cracking still diameter, in order to guarantee precise measurement material position (precision is higher than ± 2.5%), this
Invention uses interpolation type measurement scheme, avoids cracking still internals as far as possible, reduces interference source and energy loss, to penetrate source transmitting and connecing
Receive one optimal path of selection.
The equipment working condition of cracking still used in the present embodiment are as follows: measurement material position range 4000mm；Material position variation is most quick
Spend 0.5cm/s；Tank skin material is carbon steel liner 316L stainless steel；Tank wall thickness 16+3mm；Material 316L stainless steel in tank；In tank
With a thickness of inner coil pipe φ 89mm*8；Steam jacket outer diameter is outer patch half coil pipe φ 114.3mm*8.8, wall thickness 8.8mm；Water flow interlayer
Outer diameter is outer patch half coil pipe φ 114.3mm*8.8, wall thickness 8.8mm；Pressure change -95kPa-10kPa in test；Material detected
Expect entitled siloxanes+octadecyl alcolol, temperature is lower than 100 DEG C of foulings, and 160 DEG C of temperature when operation, the density of material detected is
0.800-1.300g/cm3, attachment thickness 0-20mm.
Working principle: radioactive source is arranged in built-in pipe, and built-in pipe is located in cracking still, radioactive source receiver peace
On outer wall of the cracking still far from radioactive source side, when material position changes in cracking still, due to ray circumstance of occlusion
Change, so the signal that radioactive source receiver receives can also change, received signal is transmitted to numbers for radioactive source receiver
According to processing transmitter, data processing transmitter handles the signal received, and converts it into the analog quantity of 4-20mA
Then analog signals are transferred to the analog input fastener in DCS control system through signal-transmitting cable by signal, signal passes
Transmission cable is equipped with shielded layer, and analog signals are transferred to controller by analog input fastener, and controller turns analog signal amount
It is changed to corresponding material position information, and is transferred to operator station display, staff can be obtained the material position information in cracking still.
Radioactive source used in the present invention is Na-22, and it is full that other radiation activity also can be used in radioactive sources safety environmental protection
Sufficient standard GB/T 18871-2002 " ionization radiation protection and radiation safety basic standard " requires V class safety below to exempt
Radioactive source.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. the continuous material level detection system based on cracking still, which is characterized in that controlled including radioactive source, cracking still level-sensing device and DCS
System processed；
The radioactive source is arranged in built-in pipe, and the built-in pipe is located on the inside of cracking still, and along the axial direction of cracking still
Arrangement；
The cracking still level-sensing device includes radioactive source receiver and data processing transmitter, and the radioactive source receiver, which is mounted on, to be split
It solves on outer wall of the kettle far from radioactive source side, the output end of the radioactive source receiver and the input terminal electricity of data processing transmitter
Connection；
The DCS control system includes analog input fastener, controller and operator station, the analog input fastener it is defeated
Enter end to be electrically connected with the output end of data processing transmitter by signal-transmitting cable, the output end of the analog input fastener
It is electrically connected with the input terminal of controller, the output end of the controller is electrically connected with the input terminal of operator station display.
2. the continuous material level detection system according to claim 1 based on cracking still, which is characterized in that the radioactive source is
Na-22。
3. the continuous material level detection system according to claim 1 based on cracking still, which is characterized in that the built-in pipe
For DN80 pipeline, top DN80 blind plate sealing.
4. the continuous material level detection system according to claim 1 based on cracking still, which is characterized in that the radioactive source is
Two, described two radioactive sources are equally divided into 21 parts.
5. the continuous material level detection system according to claim 1 based on cracking still, which is characterized in that the data processing
Transmitter converts the quantity of X-rays X that radioactive source receiver receives to the analog signals of 4-20mA.
6. the continuous material level detection system according to claim 1 based on cracking still, which is characterized in that the receiver
Quantity is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811454687.0A CN109282874A (en) | 2018-11-30 | 2018-11-30 | Continuous material level detection system based on cracking still |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811454687.0A CN109282874A (en) | 2018-11-30 | 2018-11-30 | Continuous material level detection system based on cracking still |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109282874A true CN109282874A (en) | 2019-01-29 |
Family
ID=65174083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811454687.0A Pending CN109282874A (en) | 2018-11-30 | 2018-11-30 | Continuous material level detection system based on cracking still |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109282874A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694239Y (en) * | 2003-11-13 | 2005-04-20 | 黑龙江省中贝技术有限公司 | Digital integrative gamma ray object position meter |
| CN2869804Y (en) * | 2005-10-10 | 2007-02-14 | 中国石油天然气股份有限公司 | Large coke tower material level continuous measuring device |
| WO2010021027A1 (en) * | 2008-08-19 | 2010-02-25 | 株式会社松島機械研究所 | Level measurement system |
| US7765867B2 (en) * | 2003-10-14 | 2010-08-03 | Endress + Hauser Gmbh + Co. Kg | Transmitter for providing inventory or inventory transfer information on a product in a container |
| CN202885914U (en) * | 2012-11-28 | 2013-04-17 | 黑龙江省中贝技术有限公司 | Combined expansion type flash liquid level control device |
| CN106352952A (en) * | 2016-08-09 | 2017-01-25 | 中石化宁波工程有限公司 | Solid material level detecting device and method |
-
2018
- 2018-11-30 CN CN201811454687.0A patent/CN109282874A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7765867B2 (en) * | 2003-10-14 | 2010-08-03 | Endress + Hauser Gmbh + Co. Kg | Transmitter for providing inventory or inventory transfer information on a product in a container |
| CN2694239Y (en) * | 2003-11-13 | 2005-04-20 | 黑龙江省中贝技术有限公司 | Digital integrative gamma ray object position meter |
| CN2869804Y (en) * | 2005-10-10 | 2007-02-14 | 中国石油天然气股份有限公司 | Large coke tower material level continuous measuring device |
| WO2010021027A1 (en) * | 2008-08-19 | 2010-02-25 | 株式会社松島機械研究所 | Level measurement system |
| CN202885914U (en) * | 2012-11-28 | 2013-04-17 | 黑龙江省中贝技术有限公司 | Combined expansion type flash liquid level control device |
| CN106352952A (en) * | 2016-08-09 | 2017-01-25 | 中石化宁波工程有限公司 | Solid material level detecting device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102798437B (en) | The method and apparatus that the instruction of the reliability of procedure parameter value is provided to host computer system | |
| CN207407963U (en) | A kind of water level monitoring system based on Internet of Things for hydraulic and hydroelectric engineering | |
| CN107990961A (en) | A kind of explosion-proof type magnetostriction liquidometer of measurable multiple liquid levels | |
| CN201600459U (en) | Digital gamma radiation detector | |
| CN207600562U (en) | A kind of high temperature modification Intelligent radar level meter | |
| CN109282874A (en) | Continuous material level detection system based on cracking still | |
| CN202109989U (en) | Anti-interference infrared temperature measuring device | |
| CN103630581B (en) | A kind of novel water quality online conductivity detector | |
| CN102937609B (en) | System for measuring hydrogen density in nuclear power plant containment vessel | |
| CN108511094A (en) | It is a kind of to be used to monitor reactor core liquid level and the device and method of vacuole | |
| CN213876040U (en) | Industrial radioactive source on-line monitoring system | |
| CN109373201A (en) | Integral intelligent pipeline | |
| CN104568061A (en) | Multi-probe passive nuclear level meter | |
| CN112764083A (en) | Industrial radioactive source on-line monitoring system | |
| RU2702701C1 (en) | Device for measuring exergy of working medium | |
| CN207095652U (en) | A kind of new guided wave formula radar levelmeter | |
| CN109991642A (en) | A kind of Dose rate measurement device and underwater Dose rate measurement system | |
| CN210400538U (en) | Embedded integrated material level detection system | |
| CN206804109U (en) | A kind of novel pulse type indicator water gage | |
| CN207472386U (en) | Spent Fuel Pool water level and temperature measurement system | |
| CN207300814U (en) | A kind of direct insertion dust concentration tester | |
| CN204388966U (en) | The passive nuclear level sensing device of Multi probe and bin material level measurement system | |
| CN110907505B (en) | Non-contact online real-time moisture detector | |
| KR200446617Y1 (en) | Dual Sensor Wireless Measurement Apparatus for Integrated Leakage Rate Test of Nuclear Power Plant | |
| CN210741582U (en) | Portable flow measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190129 |
|
| RJ01 | Rejection of invention patent application after publication |