CN113740498A - Method and device for measuring dimethyl sulfoxide in carbon fiber recovery section - Google Patents
Method and device for measuring dimethyl sulfoxide in carbon fiber recovery section Download PDFInfo
- Publication number
- CN113740498A CN113740498A CN202111203642.8A CN202111203642A CN113740498A CN 113740498 A CN113740498 A CN 113740498A CN 202111203642 A CN202111203642 A CN 202111203642A CN 113740498 A CN113740498 A CN 113740498A
- Authority
- CN
- China
- Prior art keywords
- alarm
- dimethyl sulfoxide
- analysis
- carbon fiber
- analysis device
- 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.)
- Granted
Links
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 title claims abstract description 68
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 22
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 22
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004458 analytical method Methods 0.000 claims abstract description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000001301 oxygen Substances 0.000 claims abstract description 23
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002834 transmittance Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 29
- 238000012360 testing method Methods 0.000 claims description 12
- 239000002341 toxic gas Substances 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 2
- 238000007380 fibre production Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 16
- 230000001105 regulatory effect Effects 0.000 description 11
- 238000005259 measurement Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005298 paramagnetic effect Effects 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 238000012351 Integrated analysis Methods 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a method and a device for measuring dimethyl sulfoxide at a carbon fiber recovery section, which solve the technical problems that sampling timeliness cannot be guaranteed, energy consumption is increased, discharge is unqualified and quality is difficult to guarantee due to the fact that the dimethyl sulfoxide at the recovery stage in the existing carbon fiber production depends on methods of manual sampling and laboratory analysis; the control device is used for receiving the analysis result of the analysis device and controlling the adjusting device; the adjusting device is used for adjusting the oxygen content, the water content or the transmissivity of the dimethyl sulfoxide; the analysis device is used for analyzing the water content and the transmittance of dimethyl sulfoxide or the oxygen content in a nitrogen and oxygen mixture; the invention also provides a measuring method. The invention can be used in the field of carbon fiber preparation.
Description
Technical Field
The invention relates to a carbon fiber production method and a device, in particular to a method and a device for measuring dimethyl sulfoxide in a carbon fiber recovery working section.
Background
The PAN-based carbon fiber has the characteristics of high strength, high modulus, high temperature resistance, fatigue resistance, creep resistance, electric conduction, heat insulation, small thermal expansion coefficient and the like, is a novel carbon material with comprehensive excellent performance, and is widely applied to industries such as aviation, aerospace, chemical engineering, building, sports goods and the like.
The PAN-based carbon fiber production process comprises the following steps: polymerization, recovery, spinning, oxidation, carbonization and the like.
The recovery section is the basis of the whole carbon fiber production and is directly related to the quality of the final product. Dimethyl sulfoxide (DMSO) as solvent must be recovered to reduce production cost. The method can utilize the characteristic that DMSO is easily dissolved in water, benzene and toluene to generate association, generally adopts extraction and back extraction methods to separate from other impurities, and then carries out vacuum rectification to obtain a pure product. Extraction main equipment such as an extraction tower and the like adopt MN as a gas protection medium, and the oxygen content in the medium needs to be controlled at a certain concentration. The control precision required by the oxygen content is high.
At present, dimethyl sulfoxide moisture measurement and transmittance measurement in a recovery stage in carbon fiber production basically depend on manual sampling, and the sampling timeliness is not guaranteed by a laboratory analysis method, so that the DMSO recovery efficiency is low, the energy consumption is increased, the discharge is not qualified, and the quality is difficult to guarantee.
Disclosure of Invention
The invention provides a method and a device for measuring dimethyl sulfoxide at a carbon fiber recovery section, which have the advantages of high measurement precision and stable control index, and aims to solve the technical problems that sampling timeliness cannot be guaranteed, energy consumption is increased, discharge is unqualified and quality is difficult to guarantee due to the fact that the conventional methods for sampling and laboratory analysis are used for measuring dimethyl sulfoxide at the recovery stage in carbon fiber production.
The invention provides a dimethyl sulfoxide measuring device for a carbon fiber recovery working section, which is provided with a control device, a regulating device and an analyzing device, wherein the control device is connected with the regulating device and the analyzing device; the control device is used for receiving the analysis result of the analysis device and controlling the adjusting device; the adjusting device is used for adjusting the oxygen content, the water content or the transmissivity of the dimethyl sulfoxide; the analysis device is used for analyzing the water content and the transmittance of the dimethyl sulfoxide or the oxygen content in the nitrogen and oxygen mixture.
Preferably, a sample gas pretreatment device is further arranged, and the sample gas pretreatment unit is provided with a flowmeter and a flow switch; the flow meter signal enters an analysis device, and when the flow rate is lower than a preset value, the analysis device outputs an alarm signal; when the flow is lower than the lower limit value, the flow switch acts, and the analyzer gives an alarm and stops working.
Preferably, the analysis device is further provided with an alarm and an alarm device, the alarm device is used for receiving a combustible toxic gas alarm signal, and if the combustible toxic gas reaches an alarm value, the alarm sends an audible and visual alarm signal; the alarm device is connected with the control device.
Preferably, the sampling device is further provided with a heating device, the heating device is provided with a temperature measuring device, and the temperature measuring device can measure the temperature of the sampling pipeline in real time.
The invention also provides a method for measuring the dimethyl sulfoxide in the carbon fiber recovery working section, which comprises the following steps: (1) the power supply line of the analysis device is checked, after the correctness is confirmed, the analysis device supplies power, the alarm system supplies power, and the combustible toxic gas alarm is detected; (2) manually starting an alarm system, starting a smoke exhaust fan, and testing whether the smoke exhaust fan is normal; manually starting the ventilation fan and testing whether the ventilation fan is normal; (3) checking the data of the analysis device item by item according to the design value, and performing zero point checking on the input parameters; checking the gas cylinder of the analysis device, checking whether the gas cylinder and the pipeline have gas leakage conditions, and setting the standard gas pressure of the analysis device; (4) checking a sample gas pretreatment unit; opening a sampling valve after checking to be correct, and adjusting the flow of the medium to be detected to a set value; (5) putting an analysis device into service; (6) testing whether the communication is normal or not to ensure that the output signal of the analysis device can be normally displayed on the control device; (7) after the data of the analysis device is displayed normally by the control device, manually adjusting the opening of the field adjusting device, and testing whether the valve acts normally; (8) after the adjusting device is debugged, the control device sets parameters, and the adjusting device is put into automatic operation; (9) the control device automatically adjusts the oxygen content, the water content or the transmissivity according to the set value.
Preferably, in the step (9), if the deviation between the measured value and the set value is too large, the automatic adjustment fails, the control device gives an alarm, and meanwhile, the control device is automatically switched to manual operation to remind the analysis device and the control loop to check.
The invention has the following beneficial effects:
(1) the device provided by the invention has the advantages of stable and reliable operation, timely and accurate measurement data, guaranteed control precision and capability of avoiding measurement delay caused by manual assay;
(2) the invention can improve the DMSO recovery rate and the product quality, can improve the DMSO recovery rate by 2 percent, has more stable DMSO quality and avoids the output of unqualified products;
(3) the invention can improve the automation level, does not need special analysis and test personnel, and saves the labor cost by about 10 ten thousand yuan each year.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic representation of the steps of the present invention.
Reference numbers in the figures: 1. an oxygen analyzer; 2. a near infrared analyzer; 3. an ultraviolet analyzer; 4. analyzing a cabin alarm system; 5. a sample gas pretreatment system; 6. an electric tracing system; 7. a deviation control module; 8. a PID control module; 9. an interlock control module; 11. an oxygen content regulating valve; 12. a water content regulating valve; 13. a transmittance adjustment valve; 14. a ventilation fan; 15. a DCS system; 16. a temperature control module; 17. and a pressure fuzzy control module.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1, the invention provides a dimethyl sulfoxide (DMSO) measuring device for a carbon fiber recovery section, which is provided with a DCS system 15 (control device) and an integrated analysis device (analysis cabin), wherein the analysis device is internally provided with an oxygen analyzer 1, a near infrared analyzer 2, an ultraviolet analyzer 3, an analysis cabin alarm system 4, an oxygen content regulating valve 11, a water content regulating valve 12, a transmittance regulating valve 13, a ventilation fan 14, a sample gas pretreatment system 5, an electric heat tracing system 6, a deviation control module 7, a PID control module 8, an interlock control module 9, a temperature control module 16, a pressure fuzzy control module 17, and the like.
In the present invention, the DCS control system may also adopt other control systems, such as a PLC control system.
The regulating valve controlled by the DCS is controlled by PID to form a closed loop control system, a valve opening signal is also fed back to the DCS, and the DCS controls the valve to act according to data measured by the analyzer. The automatic adjustment function is realized. Today's closed-loop automatic control techniques are based on the concept of feedback to reduce uncertainty. The elements of the feedback theory include three parts: measuring, comparing and executing. The actual value of the controlled variable of interest is measured and compared to the desired value, and this deviation is used to correct the response of the system and implement the regulation control. In engineering practice, the most widely used regulator control law is proportional, integral and derivative control, abbreviated as PID control, also known as PID regulation. A PID controller (proportional-integral-derivative controller) is a common feedback loop component in industrial control applications, consisting of a proportional unit P, an integral unit I and a derivative unit D. PID (proportional), integral, differential) controllers are the most widely used industrial controllers.
The material entering the pretreatment unit of the analyzer needs constant pressure, and in view of this requirement, the DCS control system is further provided with a pressure fuzzy control module, and the pressure fuzzy control module 17 is configured to control the stability of the pressure in the pipeline. The inlet pressure of the pretreatment unit of the analyzer is ensured to be constant.
The temperature control module is used for controlling the temperature of the pipeline medium and meeting the flow requirement of DMSO extraction.
As shown in fig. 2, the flow chart for commissioning the analysis cabin of the present application includes the following steps:
the analysis device transmits Power, the checking circuit is correct, the analyzer can transmit Power, the requirement on the stability of voltage is high, the Power supply adopts a UPS double-circuit to supply Power, the stability of the system is ensured, and the UPS (Uninterruptable Power System), namely the UPS, is a constant-voltage constant-frequency UPS which contains an energy storage device and takes an inverter as a main component. The device is mainly used for providing uninterrupted power supply for a single computer, a computer network system or other power electronic equipment. When the mains supply input is normal, the UPS supplies the mains supply to the load for use after stabilizing the voltage of the mains supply, and the UPS is an alternating current mains supply voltage stabilizer and also charges a built-in battery; when the commercial power is interrupted (power failure in accident), the UPS immediately supplies 220V alternating current to the load by the electric energy of the battery in the UPS through an inversion conversion method, so that the load can maintain normal work and the software and hardware of the load are protected from being damaged.
The alarm system is electrified for testing, the combustible gas alarm and the toxic gas alarm are calibrated by using the standard gas, the toxic gas standard gas in the example is acrylonitrile (the range is 0-100PPM, the precision is +/-5 percent, the alarm lower limit is 15 PPM'), and the combustible gas standard gas is methane (the range is 0-100 percent, the alarm lower limit is 10 percent, and the precision is +/-5 percent).
The online moisture meter and the transmittance analyzer share 1 set of sampling and sample pretreatment system. After a sample passes through the sampling probe, the sample is insulated by an electric tracing pipe cable, and the temperature of the electric tracing pipe cable is set to be more than 40 ℃, so that the sample is not lower than the temperature of a crystallization point. All the configurations of the pretreatment system are checked to ensure no errors.
After passing through a sampling probe, a sample of the online oxygen analyzer is transmitted by a common pipe cable or a stainless steel pipeline and enters a sample pretreatment box on the side surface of the analysis cabin, and a quick loop, pressure stabilization, filtration, standard sample collection, temperature, pressure, flow display and the like are mainly arranged in the pretreatment box; the box body is heated by steam, and the temperature of the box body is not lower than 40 ℃. The sample is then sent to an analyzer for analysis.
The analyzer needs to be calibrated before being put into use, the calibration gas of the analyzer is stored by a gas cylinder, and the analyzer is calibrated to meet the putting-into-use condition.
And the analyzer communicates with the DCS by adopting a redundant Modbus communication protocol.
And after the communication test is finished, the data of the analyzer is displayed on the DCS, and the DCS simultaneously generates a trend report and an alarm record to be used as production data for inquiring and archiving.
The opening of a DCS manual regulating valve is tested, the accuracy of the valve is tested, an intelligent positioner is selected as a regulating valve positioner, the precision of the positioner is +/-0.5%, the positioner is debugged at a manual position of the valve, and the valve is switched to an automatic position.
And the position switch of the regulating valve feeds back the opening of the valve in real time.
When the DCS detects that the position of the output valve is not accordant with the position of the feedback valve, the PID automatic adjustment is finished, and the valve is switched to be manual and kept.
When the DCS system breaks down, the valve keeps the current opening degree.
In order to ensure the analysis of the circulation of air in the cabin, the cabin is provided with a ventilation fan, the ventilation fan is automatically started every half hour under the daily condition of the fan, and the starting time is 5 minutes. When the alarm system acts, the fan is continuously started, the fan is provided with a stop switch outside the cabin, and when the alarm system alarms, the fan needs to be manually closed.
The verification period of the near-infrared analyzer is 30 calendar days, and the analyzer display unit pops up alarm information to remind the analyzer to be calibrated in the successive days before the verification.
The verification period of the ultraviolet analyzer is 50 calendar days, and the analyzer display unit pops up alarm information to remind the analyzer to be calibrated in the successive days before verification.
The paramagnetic oxygen analyzer runs for 90 calendar days, and the analyzer display unit pops up alarm information to remind the analyzer to be calibrated in the successive days before the verification.
According to the technical scheme provided by the embodiment of the invention, the process conditions of the near-infrared analyzer are as follows:
99.5 percent to 0.15 percent of DMSO content, 0.35 percent to 0.65 percent of water content, 40 to 50 percent of medium temperature, 0.02 percent of instrument measurement precision and 0 to 1 percent of range. The signal is output to the DCS.
The technological conditions of the transmissivity analyzer are that DMSO accounts for 99.5% -0.15%, the water content accounts for 0.35% -0.65%, the medium temperature is 40-50 ℃, and the wavelength is as follows: 289 nm; medium absorbance: cu-0.117-0.205 medium transmittance: measurement range 62.38-76.38: 0-100% measurement accuracy 0.1%. The signal is output to the DCS.
The oxygen analyzer is prepared from process medium 99.99% N2+ air at normal temperature, paramagnetic oxygen analyzer with measurement accuracy of 0.1% and measurement range of 0-25%, and signal output to DCS.
The alarm system is installed in the room close to the main door and gives a visual alarm. The combustible gas detector probe is arranged indoors.
The alarm system adopts a set of Programmable Logic Controllers (PLC) to implement local control of the PLC and is arranged in an explosion-proof alarm control box in the analysis small room. The alarm interlocking system is formed by connecting an alarm signal detected by the combustible gas transmitter into the PLC.
The PLC provides a public alarm node signal for the DCS system of the instrument control room. The alarm system provides an in-situ audible and visual alarm indication on the roof outside the analysis cabin and adjacent to the door.
When the concentration of the combustible gas reaches an alarm point or toxic gas content alarm or low oxygen alarm occurs, a red alarm lamp of the alarm control panel is lightened, an audible and visual alarm outside the analysis cabin is started, an exhaust fan is started, harmful gas is discharged outside the analysis cabin in time, and the gas in the analysis cabin is replaced.
When an alarm fault occurs, the alarm needs to be reset manually according to the situation. An outdoor manual fan switch may force the fan on at any time under normal conditions.
The panel of the explosion-proof alarm system control box is provided with 3 buttons which are respectively used for testing, alarm confirming and alarm resetting.
The panel of the explosion-proof alarm system control box is provided with 3 indicator lamps which are respectively used for indicating a power supply, alarming and confirming conditions.
The electric tracing system consists of a DCS, a temperature sensor, a power supply junction box, an electric tracing band and the like.
The electric tracing band is a self-temperature-limiting electric tracing band, when the temperature of a medium detected by the temperature sensor is lower than 40 ℃, the DCS alarms and sends an instruction to start the electric tracing band, and when the temperature is higher than 49 ℃, the electric tracing band stops heating.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (6)
1. A dimethyl sulfoxide measuring device for a carbon fiber recovery working section is characterized by being provided with a control device, an adjusting device and an analyzing device, wherein the control device is connected with the adjusting device and the analyzing device;
the control device is used for receiving the analysis result of the analysis device and controlling the adjusting device;
the adjusting device is used for adjusting the water content and the transmissivity of dimethyl sulfoxide or the oxygen content in a nitrogen and oxygen mixture;
the analysis device is used for analyzing the water content and the transmittance of the dimethyl sulfoxide or the oxygen content in the nitrogen and oxygen mixture.
2. The carbon fiber recovery workshop section dimethyl sulfoxide measuring device as claimed in claim 1, further comprising a sample gas pretreatment unit, wherein the sample gas pretreatment unit is provided with a flowmeter and a flow switch;
the flow meter signal enters an analysis device, and when the flow rate is lower than a preset value, the analysis device outputs an alarm signal; when the flow is lower than the lower limit value, the flow switch acts, and the analyzer gives an alarm and stops working.
3. The carbon fiber recovery workshop section dimethyl sulfoxide measuring device as claimed in claim 1, wherein the analysis device is further provided with an alarm and an alarm device, the alarm device is used for receiving a combustible toxic gas alarm signal, and if the combustible toxic gas reaches an alarm value, the alarm sends an audible and visual alarm signal; the alarm device is connected with the control device.
4. The carbon fiber recovery workshop section dimethyl sulfoxide measuring device as claimed in claim 1, wherein a heating device is further provided, the heating device is provided with a temperature measuring device, and the temperature measuring device can measure the temperature of the sampling pipeline in real time.
5. A method for measuring dimethyl sulfoxide in a carbon fiber recovery section is characterized by comprising the following steps:
(1) the power supply line of the analysis device is checked, after the correctness is confirmed, the analysis device supplies power, the alarm system supplies power, and the combustible toxic gas alarm is detected;
(2) manually starting an alarm system, starting a smoke exhaust fan, and testing whether the smoke exhaust fan is normal; manually starting the ventilation fan and testing whether the ventilation fan is normal;
(3) checking the data of the analysis device item by item according to the design value, and performing zero point checking on the input parameters; checking the gas cylinder of the analysis device, checking whether the gas cylinder and the pipeline have gas leakage conditions, and setting the standard gas pressure of the analysis device;
(4) checking a sample gas pretreatment unit; opening a sampling valve after checking to be correct, and adjusting the flow of the medium to be detected to a set value;
(5) putting an analysis device into service;
(6) testing whether the communication is normal or not to ensure that the output signal of the analysis device can be normally displayed on the control device;
(7) after the data of the analysis device is displayed normally by the control device, manually adjusting the opening of the field adjusting device, and testing whether the valve acts normally;
(8) after the adjusting device is debugged, the control device sets parameters, and the adjusting device is put into automatic operation;
(9) the control device automatically adjusts the oxygen content, the water content or the transmissivity according to the set value.
6. The method for measuring the dimethyl sulfoxide at the carbon fiber recovery working section as claimed in claim 5, wherein in the step (9), if the deviation between the measured value and the set value is too large, the automatic adjustment fails, the control device gives an alarm, and meanwhile, the control device is automatically switched to manual operation to remind an analysis device and a control loop of checking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203642.8A CN113740498B (en) | 2021-10-15 | 2021-10-15 | Dimethyl sulfoxide measuring method and device for carbon fiber recovery section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203642.8A CN113740498B (en) | 2021-10-15 | 2021-10-15 | Dimethyl sulfoxide measuring method and device for carbon fiber recovery section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113740498A true CN113740498A (en) | 2021-12-03 |
| CN113740498B CN113740498B (en) | 2024-07-23 |
Family
ID=78726731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111203642.8A Active CN113740498B (en) | 2021-10-15 | 2021-10-15 | Dimethyl sulfoxide measuring method and device for carbon fiber recovery section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113740498B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110161A (en) * | 2022-07-27 | 2022-09-27 | 荣成碳纤维科技有限公司 | Control system for position of coagulation bath spinneret and using method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301558A (en) * | 2007-05-08 | 2008-11-12 | 北京云辰天环保科技有限公司 | Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium |
| KR20120078452A (en) * | 2010-12-31 | 2012-07-10 | 주식회사 효성 | Purification method of solvent for carbon fiber and solvent purified using the method |
| CN213336977U (en) * | 2020-10-21 | 2021-06-01 | 新疆天业汇合新材料有限公司 | Automatic sampling analysis system |
-
2021
- 2021-10-15 CN CN202111203642.8A patent/CN113740498B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101301558A (en) * | 2007-05-08 | 2008-11-12 | 北京云辰天环保科技有限公司 | Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium |
| KR20120078452A (en) * | 2010-12-31 | 2012-07-10 | 주식회사 효성 | Purification method of solvent for carbon fiber and solvent purified using the method |
| CN213336977U (en) * | 2020-10-21 | 2021-06-01 | 新疆天业汇合新材料有限公司 | Automatic sampling analysis system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110161A (en) * | 2022-07-27 | 2022-09-27 | 荣成碳纤维科技有限公司 | Control system for position of coagulation bath spinneret and using method |
| CN115110161B (en) * | 2022-07-27 | 2024-02-02 | 山东永成新材料有限公司 | Control system for position of coagulating bath spinneret and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113740498B (en) | 2024-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201335967Y (en) | On-line monitoring system for emission of industrial fumes and flue gases | |
| CN110411890B (en) | On-site detection device, system and method for realizing maintenance-free gas density relay | |
| CN104715580A (en) | Self-calibrated type GIS indoor sulfur hexafluoride gas leakage monitoring and alarming system | |
| CN102654286A (en) | Intelligent dynamic combustion atmosphere controller | |
| US11346554B2 (en) | Combustion analyzer with simultaneous carbon monoxide and methane measurements | |
| CN113740498B (en) | Dimethyl sulfoxide measuring method and device for carbon fiber recovery section | |
| CN110444442B (en) | Remote gas density relay system and verification method thereof | |
| CN110568350A (en) | Maintenance-free intelligent gas density monitoring device, method and system | |
| CN103676647A (en) | Sewage aeration control device | |
| CN112881639A (en) | On-site on-line intelligent testing and calibrating system for chemical instrument | |
| WO2021067093A1 (en) | A combustion analyzer with dual carbon monoxide and methane measurements | |
| CN204286646U (en) | Main transformer of transformer substation thermometric loop fault detecting device | |
| CN203825781U (en) | Self-calibration type sulfur hexafluoride gas leakage monitoring alarm device in GIS chamber | |
| CN117092293A (en) | System for quick check-up of in-oil dissolved gas on-line monitoring device | |
| CN116067425A (en) | Real-time monitoring system and monitoring method for high-requirement laboratory environment | |
| CN115560865A (en) | Converter transformer sleeve monitoring method and device | |
| CN115110161B (en) | Control system for position of coagulating bath spinneret and use method | |
| CN114963013B (en) | Management method and system for monitoring urban gas operation state based on Internet of things platform | |
| CN117521436A (en) | Dynamic risk assessment method and system for gas gathering station | |
| CN112362185B (en) | Digital transformer thermometer | |
| CN105678983B (en) | A kind of household alarm automatic detection device and its method | |
| CN214473277U (en) | On-site on-line intelligent testing and calibrating system for chemical instrument | |
| CN221238927U (en) | Gas distribution environment calibration system | |
| CN210379715U (en) | Temperature control equipment for manufacturing welding joint of crosslinked polyethylene insulated power cable | |
| CN114018309B (en) | Industrial wireless instrument field performance test comparison device and test method |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230329 Address after: No. 88, Xingye Road, Rongcheng City, Weihai City, Shandong Province, 264300 Applicant after: Shandong Yongcheng New Material Co.,Ltd. Address before: No. 88, Xingye Road, Rongcheng City, Weihai City, Shandong Province, 264300 Applicant before: Rongcheng Carbon Fiber Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |