CN116221615B - Process control system and control method for safe hydrogenation operation - Google Patents
Process control system and control method for safe hydrogenation operation Download PDFInfo
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- CN116221615B CN116221615B CN202310240170.6A CN202310240170A CN116221615B CN 116221615 B CN116221615 B CN 116221615B CN 202310240170 A CN202310240170 A CN 202310240170A CN 116221615 B CN116221615 B CN 116221615B
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- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004886 process control Methods 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 103
- 238000007664 blowing Methods 0.000 claims abstract description 29
- 239000011261 inert gas Substances 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000007872 degassing Methods 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims description 75
- 229910052739 hydrogen Inorganic materials 0.000 claims description 75
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 66
- 238000005259 measurement Methods 0.000 claims description 13
- 230000005856 abnormality Effects 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000013024 troubleshooting Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000007812 deficiency Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000013499 data model Methods 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/032—Control means using computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/036—Control means using alarms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/042—Reducing risk of explosion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Alarm Systems (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a process control system and a control method for safe operation of hydrogenation, wherein the system comprises: the fire control system comprises an inert gas source storage tank, an explosion-proof electromagnetic valve, a control gas valve box, a blowing gas valve box, a fire control gas valve box, safety monitoring equipment and a control device, wherein the inert gas source storage tank stores inert gas, is connected with the fire control, control and blowing gas valve box through a pipeline, and the explosion-proof electromagnetic valve is arranged at two ends of the pipeline connection; the control air valve box provides driving air to the pneumatic valves in the hydrogenation equipment, the supercharging equipment and the sequential control valve box equipment; the blowing and degassing valve box is used for blowing and removing air, impurities, frost and moisture from valve equipment, a low-temperature pipeline and a normal-temperature pipeline; the fire control gas valve box blows off through inert gas when the potential safety hazard alarm appears in the position of leakage, the position of discharge and the feeding of each hydrogenation device; the safety monitoring equipment monitors and controls the running state of the process system equipment, and comprises sensor equipment, a gas alarm controller, a gateway router and a control device, so that safety interlocking control is carried out to ensure hydrogenation safety operation.
Description
Technical Field
The invention relates to the technical field of safety measurement and control, in particular to a process control system and a control method for hydrogenation safe operation.
Background
The hydrogenation system mainly comprises flammable and explosive mediums such as low-temperature liquid hydrogen, high-pressure hydrogen and the like, high-pressure hydrogenation equipment and the like, and the whole set of hydrogen storage hydrogenation safety operation is a basic premise and a basic guarantee of hydrogenation operation, and the hydrogenation safety operation needs a set of hydrogenation safety process control with high safety and high reliability. In the prior art, a comprehensive and effective monitoring control system for the hydrogenation equipment is lacking, so that the state of the whole process system of the hydrogenation equipment cannot be monitored timely and comprehensively, and the safe operation and maintenance of the hydrogenation process are not facilitated.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects existing in the prior art, thereby providing a process control system and a control method for safe hydrogenation operation.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a process control system for safe operation of hydrogenation, including: inert gas source storage tank, explosion-proof solenoid valve, control gas valve box, blow out gas valve box, fire control gas valve box, safety monitoring equipment and controlling means, wherein:
the inert gas source storage tank is used for storing inert gas, and is connected with the fire control gas valve box, the control gas valve box and the blowing-off gas valve box through pipelines, and explosion-proof electromagnetic valves are arranged at two ends of the pipeline connection;
the control air valve box is used for starting and stopping the air valve and providing driving air for the air valve in the hydrogenation equipment, the air valve in the pressurizing equipment and the air valve in the sequential control valve box equipment;
The blowing and degassing valve box is used for blowing and removing air, impurities, frost and moisture from valve equipment, a low-temperature pipeline and a normal-temperature pipeline;
The fire control gas valve box is used for blowing off through inert gas when potential safety hazards are alarmed at the hydrogen discharge end, the pipeline interface end and the gas distribution equipment end;
Safety monitoring equipment for monitoring and controlling process system equipment operating conditions, including sensor equipment, gas alarm controllers and gateway routers, wherein the sensor equipment includes: pressure sensor, hydrogen concentration detector, flame detector, combustible detector, noise sensor, vibration sensor, current sensor and explosion-proof camera, gas alarm controller support multichannel sensor alarm display, and it is through wireless communication receiving field alarm instrument and with GPRS SMS send management personnel, sends to controlling means through gateway router and carries out safe coordinated control, wherein:
pressure sensors are arranged on two sides of the connection of the inert gas source storage tank and the control gas valve box, the blowing gas valve box and the fire control gas valve box and are used for gas pressure early warning;
The interface end of the low-temperature pipeline is provided with a heat flow sensor and a hydrogen concentration detector, and the heat flow sensor and the hydrogen concentration detector are used for judging the heat insulation and heat preservation conditions of the pipeline and the leakage conditions of the low-temperature pipeline according to the distribution conditions of the temperature field, performing fault early warning on the interface end of the low-temperature pipeline, and confirming that the interface end leaks hydrogen for warning when the hydrogen concentration detector alarms;
The method comprises the steps that an interface end of a high-pressure air source pipeline inlet in hydrogenation equipment, an interface end of a high-pressure output pipeline in supercharging equipment, an interface end of a low-temperature pipeline inlet in supercharging equipment, an interface end of an air source inlet and an outlet interface end of sequential control valve box equipment, and a high-pressure air source inlet of a hydrogen discharge interface end are provided with a noise sensor and a vibration sensor, when the measured value of the noise sensor is larger than a preset threshold value, the large-range pipeline interface end leakage is represented to carry out fault alarm prompt, and when the measured value of the vibration sensor is larger than the preset threshold value, faults are confirmed and GPRS short message early warning is sent;
A hydrogen concentration detector, a flame detector and a combustible detector are arranged near the hydrogenation equipment, the hydrogen concentration detector is provided with different alarm thresholds, and when the hydrogen concentration detector exceeds the corresponding set thresholds, an alarm is given, and meanwhile, when the flame detector and the combustible detector monitor that corresponding flames exist on the scene, the alarm is given;
Corresponding hydrogen concentration detectors, flame detectors and combustible detectors are arranged in the control gas valve box, the blowing gas valve box and the fire-fighting gas valve box, when the hydrogen concentration is too high, combustible alarm and flame detector related alarm trigger corresponding gas alarm controllers, data are transmitted to a control device to carry out cloud data transmission and processing, and fire-fighting gas safety interlocking control and corresponding blowing gas interlocking control are carried out;
The supercharging equipment is provided with a current sensor, a vibration sensor, a flame detector, a hydrogen concentration detector, a combustible detector and an explosion-proof camera, wherein the current sensor is used for measuring the working current state of the supercharging equipment, and when the working state of a motor of the supercharging equipment is longer than rated working current, the state of the motor of the pump is alarmed; in the hydrogenation process, when the pressurizing equipment carries out high-pressure liquid hydrogen pressurization, the pressurizing equipment correspondingly generates amplitude fluctuation, when the amplitude fluctuation of the vibration sensor exceeds a preset threshold value, an early warning prompt is generated, video viewing is carried out through the explosion-proof camera, potential safety hazard investigation is carried out, and meanwhile, hydrogen leakage detection is carried out according to the hydrogen concentration detector and the combustible detector, so that alarm inspection is generated; the explosion-proof camera is used for monitoring the running state of the field process equipment and carrying out relevant safety record.
In an embodiment, the sensor device is connected by a wired connection or a wireless connection, wherein the wireless connection adopts a narrowband internet of things technology, and is transmitted to the gas alarm controller through the internet of things base station.
In an embodiment, the hydrogenation equipment, the supercharging equipment, the sequential control valve box equipment and the gas distribution equipment are provided with fire-fighting rings, and the fire-fighting mode adopts an annular gas injection mode.
In an embodiment, the control device includes: the gas alarm controller transmits data to the control computer for data calculation, processing and data model comparison and cloud data transmission, and meanwhile generates a control instruction according to a processing result to perform safety interlocking control through the control cabinet.
In an embodiment, the control computer is provided with monitoring software, data recording and data query are carried out on data parameters of the hydrogenation system through a data report function, the pressure and temperature states of hydrogen media are monitored in real time in the running process of the monitoring software, states of a regulating valve and a pneumatic control valve are monitored, state parameters before and after a pump of a booster pump in the booster equipment are monitored, the switching times of the pump and the valve are recorded, the monitoring software is used for fault diagnosis and service life analysis, and when parameter abnormality or faults occur, an alarm signal is sent out and alarm information is transmitted to a station control system.
In a second aspect, an embodiment of the present invention provides a process control method for safe operation of hydrogenation, where the process control system for safe operation of hydrogenation based on the first aspect includes: acquiring measurement data of a plurality of sensor devices, and performing fault alarm when at least one sensor device exceeds a corresponding preset threshold value, wherein the types of the fault alarm comprise: overpressure alarm, data abnormality alarm, communication abnormality alarm, hydrogen leakage alarm, flame alarm and air source deficiency alarm;
And responding to different emergency control measures according to the alarm type of the fault equipment, and performing equipment safety interlocking control.
In one embodiment, the step of performing the device safety interlock control according to the alarm type of the faulty device and responding to different emergency control measures includes:
When the pressurizing equipment and the hydrogenation equipment have fault alarm, the pressurizing equipment and the hydrogenation equipment are controlled to be suspended to work, and meanwhile, an associated executing mechanism is stopped, a fire-fighting air valve associated with a fire-fighting air valve box is opened, a blowing-off air valve associated with a blowing-off air is opened, and meanwhile, related alarm information is sent, and related technicians are informed of the faults of the pressurizing equipment and the hydrogenation equipment through sending short messages to perform related troubleshooting work;
And when the hydrogen concentration of the sequential control valve box equipment and the gas distribution equipment is indicated by hydrogen concentration alarm, the fire control ring associated in the fire control gas valve box is controlled to be opened, the corresponding hydrogenation equipment is closed by interlocking control, and after the hydrogen concentration is detected normally, relevant technicians are notified to perform relevant troubleshooting work.
In one embodiment, the step of performing the device safety interlock control according to the alarm type of the faulty device and responding to different emergency control measures includes:
The safety valve and the emergency discharge valve in the equipment in the process control system have a tripping alarm function, corresponding safety valve limit values are selected according to the functions of the equipment, and if the safety valve limit values are exceeded, the safety valve trips, and corresponding safety monitoring equipment is interlocked.
In one embodiment, the fault alert employs a level alert mode comprising: and three modes of level 1, level 2 and level 3, wherein the level 2 and the level 3 indicate that hydrogenation is forbidden, and a key parameter control alarm mode is adopted.
In an embodiment, the measurement data of the plurality of sensor devices are respectively subjected to instrument threshold setting through monitoring software, and if the measurement data exceeds the corresponding threshold range, audible and visual alarm is generated, an alarm window pops up a software interface to prompt alarm contents and alarm positions, and device interlocking is performed;
under the automatic state, when the alarm mode is 2-level and 3-level, the hydrogenation air source valve is closed by one key, emergency stop is realized, meanwhile, the inert air source valve, the fire-fighting air valve box and the control air valve box equipment are opened, so that the related executing mechanism works normally, and when the system state is recovered to be normal, the related troubleshooting work is carried out.
The technical scheme of the invention has the following advantages:
The invention provides a process control system and a control method for safe operation of hydrogenation, wherein the system comprises the following steps: the fire control system comprises an inert gas source storage tank, an explosion-proof electromagnetic valve, a control gas valve box, a blowing gas valve box, a fire control gas valve box, safety monitoring equipment and a control device, wherein the inert gas source storage tank stores inert gas, is connected with the fire control, control and blowing gas valve box through a pipeline, and the explosion-proof electromagnetic valve is arranged at two ends of the pipeline connection; the control air valve box provides driving air to the pneumatic valves in the hydrogenation equipment, the supercharging equipment and the sequential control valve box equipment; the blowing and degassing valve box is used for blowing and removing air, impurities, frost and moisture from valve equipment, a low-temperature pipeline and a normal-temperature pipeline; the fire control gas valve box blows off through inert gas when the potential safety hazard alarm appears in the position of leakage, the position of discharge and the feeding of each hydrogenation device; the safety monitoring equipment monitors and controls the running state of the process system equipment, and comprises sensor equipment, a gas alarm controller, a gateway router and a control device, measurement data of a plurality of sensor equipment are obtained, when at least one sensor equipment exceeds a corresponding preset threshold value, fault alarm is carried out, and the types of the fault alarm comprise: overpressure alarm, data abnormality alarm, communication abnormality alarm, hydrogen leakage alarm, flame alarm and air source deficiency alarm; and responding to different emergency control measures according to the alarm type of the fault equipment, and performing equipment safety interlocking control so as to perform safety interlocking control and guarantee hydrogenation safety operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a process control system for safe operation of a hydrogen addition in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a process control method for safe operation of hydrogenation in an embodiment of the invention.
Reference numerals illustrate:
1-an inert gas source storage tank, 2-an explosion-proof electromagnetic valve, 3-a control gas valve box, 4-a blowing gas valve box, 5-a fire control gas valve box, 61-a pressure sensor and 7-a control device; 31-hydrogenation equipment, 32-pressurizing equipment, 33-sequential control valve box equipment, 41-valve equipment, 42-low-temperature pipelines and 43-normal-temperature pipelines; 51-hydrogen discharge end, 52-pipeline interface end, 53-gas distribution equipment end, 62-explosion-proof camera, 63-gas alarm controller, 64-gateway router, 71-control cabinet and 72-control computer.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The embodiment of the invention provides a process control system for safe operation of hydrogenation, as shown in fig. 1, which specifically comprises the following steps: an inert gas source storage tank 1, an explosion-proof electromagnetic valve 2, a control gas valve box 3, a blowing-off gas valve box 4, a fire-fighting gas valve box 5, safety monitoring equipment and a control device 7, wherein:
the inert gas source storage tank 1 is used for storing inert gas, and is connected with the control gas valve box 3, the blowing-off gas valve box 4 and the fire-fighting gas valve box 5 through pipelines, and explosion-proof electromagnetic valves 2 are arranged at two ends of the pipeline connection. The explosion-proof electromagnetic valve 2 is used for switching on and off the gas flow direction, and is required to be provided with explosion-proof/intrinsically safe functions.
The control air valve box 3 is used for starting and stopping the pneumatic valve, providing driving air to the pneumatic valve in the hydrogenation equipment 6, the pneumatic valve in the pressurizing equipment 32 and the pneumatic valve in the sequential control valve box equipment 8, for example, providing driving air with the pressure of 0.5-5Mpa to the actuating mechanism.
The blowing gas valve box 4 is used for blowing out air, impurities, frost and moisture by the valve equipment 41, the low-temperature pipeline 42 and the normal-temperature pipeline 43, explosion can be generated due to friction of excessive scrap such as scrap iron and hydrogen, frost can be formed due to moisture, for example, the pipeline needs to be subjected to blowing-out replacement for 10-20 times, and the dew point value is within minus 53 ℃, so that the replacement is qualified.
The fire-fighting air valve box 5 is used for blowing off by inert gas when potential safety hazard alarms appear at the hydrogen discharge end 51, the pipeline interface end 52 and the air distribution equipment end 53.
Safety monitoring equipment for monitoring and controlling process system equipment operating conditions, including sensor equipment, gas alarm controllers 63 and gateway routers 64, wherein the sensor equipment comprises: the pressure sensor 61, the hydrogen concentration detector, the flame detector, the combustible detector, the noise sensor, the vibration sensor, the current sensor and the explosion-proof camera 62, and the gas alarm controller 63 supports the alarm display of multiple sensors, receives the on-site alarm instrument through wireless communication and sends a GPRS short message to a manager, and sends the GPRS short message to the control device 7 through the gateway router 64 for safety linkage control. The data transmission mode of the sensor equipment is wireless or wired, and when the sensor equipment is in wireless communication, a narrow-band internet of things (NB-IOT) technology is adopted to receive the on-site alarm signal.
The distribution positions of the sensors (only the positions of the pressure sensor 61 and the explosion-proof camera 62 are illustrated in fig. 1, and the positions of other sensors are specifically described in the text), which are specifically as follows:
The two sides of the connection of the inert gas source storage tank 1 and the control gas valve box 3, the blowing-off gas valve box 4 and the fire-fighting gas valve box 5 are respectively provided with a pressure sensor 10 for gas pressure early warning, and the gas source shortage or overpressure alarm can be specifically produced according to the measurement value of the pressure sensor and a preset safety threshold.
The interface end of the low-temperature pipeline 42 is provided with a heat flow sensor and a hydrogen concentration detector, and is used for judging the heat insulation and heat preservation conditions of the pipeline and the leakage conditions of the low-temperature pipeline according to the distribution conditions of the temperature field, performing fault early warning on the interface end of the low-temperature pipeline, and confirming that the hydrogen at the interface end leaks to alarm when the hydrogen concentration detector alarms. In a specific embodiment, the range of the heat flow sensor is 0-1000w/m 2, when the heat transfer data of the low-temperature interface end is greater than 800w/m 2, corresponding heat insulation alarm is carried out, corresponding fault early warning prompt is carried out, the hydrogen concentration sensor adopts electrochemistry of 0-1000ppm or 0-100% lel, the alarm preset value ranges of 400ppm and 800ppm and 25% lel and 50% lel, and when the corresponding set value is exceeded, the alarm is carried out.
The interface end of the high-pressure air source pipeline inlet in the hydrogenation equipment 31, the interface end of the high-pressure output pipeline in the supercharging equipment 32, the interface end of the low-temperature pipeline 42 in the supercharging equipment 32, the interface end of the air source inlet and the outlet interface end of the sequential control valve box equipment 33 and the high-pressure air source inlet of the hydrogen discharge interface end are provided with a noise sensor and a vibration sensor, when the measured value of the noise sensor is larger than a preset threshold value, the leakage of the large-range pipeline interface end 52 is represented to carry out fault alarm prompt, and when the measured value of the vibration sensor is larger than the preset threshold value, the fault is confirmed and GPRS short message early warning is sent; in one embodiment, the vibration sensor has a range of 0-10mm/s 2, and when the pipe interface end 52 has a large vibration displacement, for example, greater than 6mm/s 2, the safety interlock is controlled, the noise sensor has a range of 30dB-120dB, and when the measured noise exceeds 65dB, the safety interlock is performed when the large-range leakage of the pipe interface end 52 occurs.
The hydrogen concentration detector, the flame detector and the combustible detector are arranged near the hydrogenation equipment 31, different alarm thresholds are set for the hydrogen concentration detector, and when the alarm threshold exceeds the corresponding set threshold, the alarm is carried out when the flame detector and the combustible detector monitor the corresponding flame on site.
Corresponding hydrogen concentration detectors, flame detectors and combustible detectors are arranged in the control gas valve box 3, the blowing gas valve box 4 and the fire-fighting gas valve box 5, when the hydrogen concentration is overlarge, combustible alarm occurs, the related alarm of the flame detectors triggers corresponding gas alarm controllers 63, and meanwhile data are transmitted to the control device 7 for cloud data transmission and processing, and fire-fighting gas safety interlocking control and corresponding blowing gas interlocking control are performed.
The supercharging device 32 is provided with a current sensor, a vibration sensor, a flame detector, a hydrogen concentration detector, a flammable detector and an explosion-proof camera 62, wherein the current sensor is used for measuring the working current state of the supercharging device 32, and when the working state of a motor of the supercharging device 32 is longer than the rated working current, a pump motor state alarm occurs; in the hydrogenation process, the booster equipment 32 generates amplitude fluctuation corresponding to the booster pump head when carrying out high-pressure liquid hydrogen pressurization, and when the amplitude fluctuation of the vibration sensor exceeds a preset threshold value, an early warning prompt is generated, video viewing is carried out through the explosion-proof camera 62, potential safety hazard investigation is carried out, meanwhile, hydrogen leakage detection is carried out according to the hydrogen concentration detector and the combustible detector, alarm inspection is generated, and the explosion-proof camera 62 is used for monitoring the running state of field process equipment and carrying out relevant safety record.
In the embodiment of the invention, a fire-fighting ring and a hydrogen concentration sensor are arranged at the positions where hydrogen is easy to leak, such as a hydrogenation device 31, a pressurizing device 32, a sequential control valve box device 33 and a gas distribution device, when the concentration of surrounding gas is measured by the hydrogen concentration sensor to be greater than a preset threshold value, a plurality of regular round holes are arranged on the nitrogen fire-fighting ring, and the fire-fighting mode adopts an annular gas injection mode to instantly increase the concentration of nitrogen in a space and dilute the concentration of oxygen, hydrogen or combustible gas.
According to the embodiment of the invention, at the position where the hydrogen flow rate is high and the risk of fire exists, the inert gas protection device is arranged, the fire part is generally positioned at the pipe orifice for discharging hydrogen into air, the fire can be effectively controlled by adopting nitrogen to extinguish fire, the flame detector is arranged at the corresponding area position for detecting flame, the corresponding remote control valve is automatically interlocked after the alarm occurs, and the nitrogen blowing is carried out on the reserved blowing opening of the pipe orifice.
The control device 7 in the embodiment of the invention comprises: the control cabinet 71 and the control computer 72, the gas alarm controller 63 transmits data to the control computer 72 for data calculation, processing and data model comparison and cloud data transmission, and meanwhile, a control instruction is generated according to a processing result and safety interlocking control is performed through the control cabinet 71. The control computer 72 is provided with monitoring software, which performs data recording and data inquiry on data parameters of the hydrogenation system through a data report function, monitors the pressure and temperature states of hydrogen media in real time in the operation process of the monitoring software, monitors the states of a regulating valve and a pneumatic control valve, monitors the state parameters before and after the pump of the booster pump in the booster equipment 32, records the switching times of the pump and the valve, is used for fault diagnosis and service life analysis, sends an alarm signal when the parameters are abnormal or have faults, and transmits alarm information to the station control system.
According to the hydrogenation safe operation process control system provided by the embodiment of the invention, the corresponding sensors are reasonably arranged on the hydrogenation related equipment, and the alarm is given according to the data of the sensors, so that the safety interlocking control is carried out, and the safety is high and the reliability is strong.
Example 2
The embodiment of the invention provides a process control method for safe operation of hydrogenation, which is based on a control system in embodiment 1 and comprises the following steps:
Step S1, acquiring measurement data of a plurality of sensor devices, and performing fault alarm when at least one of the measurement data exceeds a corresponding preset threshold value, wherein the types of the fault alarm comprise: overpressure alarm, data abnormality alarm, communication abnormality alarm, hydrogen leakage alarm, flame alarm and air source deficiency alarm; wherein: the data anomaly alarm comprises the following steps: and (3) heat flow data abnormality alarm and current data abnormality alarm.
And step S2, responding to different emergency control measures according to the alarm type of the fault equipment, and performing equipment interlocking control. Specifically, the method comprises the following steps:
Step S21, when the pressurizing equipment and the hydrogenation equipment have fault alarm, controlling to pause the operation of the pressurizing equipment and the hydrogenation equipment, simultaneously stopping the associated executing mechanism, opening the fire-fighting gas associated with the fire-fighting gas valve box, opening the associated executing mechanism for blowing off the gas, simultaneously sending out related alarm information, and notifying related technicians of the fault of the pressurizing equipment and the hydrogenation equipment by sending short messages to perform related troubleshooting operation;
And S22, controlling to open a fire-fighting ring associated in the fire-fighting gas valve box when the sequential control valve box equipment and the gas distribution equipment give out hydrogen concentration alarm prompt, and simultaneously controlling to close corresponding hydrogenation equipment in an interlocking manner, and notifying relevant technicians to perform relevant troubleshooting work after the hydrogen concentration detection is normal.
And S23, the safety valve and the emergency discharge valve in the equipment (the control gas valve box, the blow-off gas valve box, the sequential control valve box, the hydrogenation equipment, the supercharging equipment and the gas distribution equipment) in the process control system have a tripping alarm function, corresponding safety valve limit values are selected according to the functions of the equipment, and if the safety valve limit values are exceeded, the safety valve trips, and corresponding safety monitoring equipment is interlocked. The safety valve is in a mechanical mode, the safety valve cannot alarm, the safety valve is in a jump state, and the safety valve can alarm and detect through a pressure sensor connected with the safety valve and a hydrogen concentration sensor arranged nearby the safety valve.
It should be noted that, the steps S21, S22, and S23 are all emergency control measures responding to different types of alarms of different fault devices, regardless of the sequence.
The embodiment of the invention adopts a grade alarm mode, which comprises the following steps: three modes of level 1, level 2 and level 3, wherein level 2 and level 3 indicate that hydrogenation is prohibited, wherein level 3 is very dangerous and must stop hydrogenation, and a key parameter control alarm mode is adopted, and the key parameter control alarm mode has the following table:
The measurement data of the plurality of sensor devices are respectively subjected to instrument threshold setting through monitoring software VxSCADA, and if the measurement data exceeds the corresponding threshold range, audible and visual alarm is generated, an alarm window pops up from a software interface to prompt alarm contents and alarm positions, and device interlocking is performed; under the automatic state, when the alarm mode is 2 grades and 3 grades, the hydrogenation air source valve is closed by one key, emergency stop is realized, meanwhile, the inert air source valve, the fire-fighting air valve box and the control air valve box equipment are opened, so that the related executing mechanism works normally, and when the system state is recovered to be normal, the related troubleshooting work is carried out, thereby ensuring the safety and reliability of the system operation.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A process control system for safe operation of hydrogenation comprising: inert gas source storage tank, explosion-proof solenoid valve, control gas valve box, blow out gas valve box, fire control gas valve box, safety monitoring equipment and controlling means, wherein:
the inert gas source storage tank is used for storing inert gas, and is connected with the fire control gas valve box, the control gas valve box and the blowing-off gas valve box through pipelines, and explosion-proof electromagnetic valves are arranged at two ends of the pipeline connection;
the control air valve box is used for starting and stopping the air valve and providing driving air for the air valve in the hydrogenation equipment, the air valve in the pressurizing equipment and the air valve in the sequential control valve box equipment;
The blowing and degassing valve box is used for blowing and removing air, impurities, frost and moisture from valve equipment, a low-temperature pipeline and a normal-temperature pipeline;
The fire control gas valve box is used for blowing off through inert gas when potential safety hazards are alarmed at the hydrogen discharge end, the pipeline interface end and the gas distribution equipment end;
Safety monitoring equipment for monitoring and controlling process system equipment operating conditions, including sensor equipment, gas alarm controllers and gateway routers, wherein the sensor equipment includes: pressure sensor, hydrogen concentration detector, flame detector, combustible detector, noise sensor, vibration sensor, current sensor and explosion-proof camera, gas alarm controller support multichannel sensor alarm display, and it is through wireless communication receiving field alarm instrument and with GPRS SMS send management personnel, sends to controlling means through gateway router and carries out safe coordinated control, wherein:
pressure sensors are arranged on two sides of the connection of the inert gas source storage tank and the control gas valve box, the blowing gas valve box and the fire control gas valve box and are used for gas pressure early warning;
The interface end of the low-temperature pipeline is provided with a heat flow sensor and a hydrogen concentration detector, and the heat flow sensor and the hydrogen concentration detector are used for judging the heat insulation and heat preservation conditions of the pipeline and the leakage conditions of the low-temperature pipeline according to the distribution conditions of the temperature field, performing fault early warning on the interface end of the low-temperature pipeline, and confirming that the interface end leaks hydrogen for warning when the hydrogen concentration detector alarms;
The method comprises the steps that an interface end of a high-pressure air source pipeline inlet in hydrogenation equipment, an interface end of a high-pressure output pipeline in supercharging equipment, an interface end of a low-temperature pipeline inlet in supercharging equipment, an interface end of an air source inlet and an outlet interface end of sequential control valve box equipment, and a high-pressure air source inlet of a hydrogen discharge interface end are provided with a noise sensor and a vibration sensor, when the measured value of the noise sensor is larger than a preset threshold value, the large-range pipeline interface end leakage is represented to carry out fault alarm prompt, and when the measured value of the vibration sensor is larger than the preset threshold value, faults are confirmed and GPRS short message early warning is sent;
A hydrogen concentration detector, a flame detector and a combustible detector are arranged near the hydrogenation equipment, the hydrogen concentration detector is provided with different alarm thresholds, and when the hydrogen concentration detector exceeds the corresponding set thresholds, an alarm is given, and meanwhile, when the flame detector and the combustible detector monitor that corresponding flames exist on the scene, the alarm is given;
Corresponding hydrogen concentration detectors, flame detectors and combustible detectors are arranged in the control gas valve box, the blowing gas valve box and the fire-fighting gas valve box, when the hydrogen concentration is too high, combustible alarm and flame detector related alarm trigger corresponding gas alarm controllers, data are transmitted to a control device to carry out cloud data transmission and processing, and fire-fighting gas safety interlocking control and corresponding blowing gas interlocking control are carried out;
The supercharging equipment is provided with a current sensor, a vibration sensor, a flame detector, a hydrogen concentration detector, a combustible detector and an explosion-proof camera, wherein the current sensor is used for measuring the working current state of the supercharging equipment, and when the working state of a motor of the supercharging equipment is longer than rated working current, the state of the motor of the pump is alarmed; in the hydrogenation process, when the pressurizing equipment carries out high-pressure liquid hydrogen pressurization, the pressurizing equipment correspondingly generates amplitude fluctuation, when the amplitude fluctuation of the vibration sensor exceeds a preset threshold value, an early warning prompt is generated, video viewing is carried out through the explosion-proof camera, potential safety hazard investigation is carried out, and meanwhile, hydrogen leakage detection is carried out according to the hydrogen concentration detector and the combustible detector, so that alarm inspection is generated; the explosion-proof camera is used for monitoring the running state of the field process equipment and carrying out relevant safety record.
2. The hydro-safe operating process control system of claim 1, wherein the sensor device is connected by wire or wirelessly, wherein the wireless connection is a narrowband internet of things technology, and is transmitted to the gas alarm controller through an internet of things base station.
3. The hydrogenation safety operation process control system according to claim 1, wherein the hydrogenation equipment, the supercharging equipment, the sequential control valve box equipment and the gas distribution equipment are provided with fire-fighting rings, and the fire-fighting mode adopts an annular gas injection mode.
4. The hydro-safely operated process control system of claim 1, wherein the control device comprises: the gas alarm controller transmits data to the control computer for data calculation, processing and data model comparison and cloud data transmission, and meanwhile generates a control instruction according to a processing result to perform safety interlocking control through the control cabinet.
5. The hydrogenation safety operation process control system according to claim 4, wherein the control computer is provided with monitoring software, data recording and data inquiring are carried out on data parameters of the hydrogenation system through a data report function, the pressure and temperature states of hydrogen media are monitored in real time in the operation process of the monitoring software, states of a regulating valve and a pneumatic control valve are monitored, state parameters before and after a pump of a booster pump in the booster equipment are monitored, the number of times of switching of the pump and the valve is recorded, the monitoring software is used for fault diagnosis and service life analysis, and an alarm signal is sent out when parameter abnormality or faults occur, and alarm information is transmitted to a station control system.
6. A process control method for safe operation of hydrogenation, based on the process control system for safe operation of hydrogenation according to any one of claims 1 to 5, comprising:
acquiring measurement data of a plurality of sensor devices, and performing fault alarm when at least one sensor device exceeds a corresponding preset threshold value, wherein the types of the fault alarm comprise: overpressure alarm, data abnormality alarm, communication abnormality alarm, hydrogen leakage alarm, flame alarm and air source deficiency alarm;
And responding to different emergency control measures according to the alarm type of the fault equipment, and performing equipment safety interlocking control.
7. The process control method for the safe operation of the hydrogenation according to claim 6, wherein the step of performing the safety interlock control of the equipment in response to different emergency control measures according to the alarm type of the failed equipment comprises:
When the pressurizing equipment and the hydrogenation equipment have fault alarm, the pressurizing equipment and the hydrogenation equipment are controlled to be suspended to work, and meanwhile, an associated executing mechanism is stopped, a fire-fighting air valve associated with a fire-fighting air valve box is opened, a blowing-off air valve associated with a blowing-off air is opened, and meanwhile, related alarm information is sent, and related technicians are informed of the faults of the pressurizing equipment and the hydrogenation equipment through sending short messages to perform related troubleshooting work;
And when the hydrogen concentration of the sequential control valve box equipment and the gas distribution equipment is indicated by hydrogen concentration alarm, the fire control ring associated in the fire control gas valve box is controlled to be opened, the corresponding hydrogenation equipment is closed by interlocking control, and after the hydrogen concentration is detected normally, relevant technicians are notified to perform relevant troubleshooting work.
8. The process control method for the safe operation of the hydrogenation according to claim 6, wherein the step of performing the safety interlock control of the equipment in response to different emergency control measures according to the alarm type of the failed equipment comprises:
The safety valve and the emergency discharge valve in the equipment in the process control system have a tripping alarm function, corresponding safety valve limit values are selected according to the functions of the equipment, and if the safety valve limit values are exceeded, the safety valve trips, and corresponding safety monitoring equipment is interlocked.
9. The process control method for the safe operation of hydrogenation according to claim 6, wherein the fault alarm adopts a level alarm mode, comprising: and three modes of level 1, level 2 and level 3, wherein the level 2 and the level 3 indicate that hydrogenation is forbidden, and a key parameter control alarm mode is adopted.
10. The process control method for safe hydrogenation operation according to claim 6, wherein the measurement data of the plurality of sensor devices are respectively subjected to instrument threshold setting by monitoring software, and if the measurement data exceeds the corresponding threshold range, audible and visual alarm is generated, a software interface pops up an alarm window to prompt alarm contents and prompt alarm positions, and equipment interlocking is performed;
under the automatic state, when the alarm mode is 2-level and 3-level, the hydrogenation air source valve is closed by one key, emergency stop is realized, meanwhile, the inert air source valve, the fire-fighting air valve box and the control air valve box equipment are opened, so that the related executing mechanism works normally, and when the system state is recovered to be normal, the related troubleshooting work is carried out.
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