CN112833334A - Mixed gas conveying and adjusting system and adjusting method - Google Patents
Mixed gas conveying and adjusting system and adjusting method Download PDFInfo
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- CN112833334A CN112833334A CN202110196790.5A CN202110196790A CN112833334A CN 112833334 A CN112833334 A CN 112833334A CN 202110196790 A CN202110196790 A CN 202110196790A CN 112833334 A CN112833334 A CN 112833334A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 196
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000001257 hydrogen Substances 0.000 claims abstract description 74
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 74
- 238000002156 mixing Methods 0.000 claims abstract description 48
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000004458 analytical method Methods 0.000 claims abstract description 33
- 239000003345 natural gas Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 25
- 238000003860 storage Methods 0.000 claims description 16
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000004880 explosion Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- 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
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a mixed gas conveying and adjusting system and method, and belongs to the field of energy conveying and adjusting. The system comprises a gas mixing unit, a conveying unit and terminal equipment which are sequentially communicated, wherein the terminal equipment is connected with a first analysis unit, and the first analysis unit is connected with the gas mixing unit through a controller. According to the system, a sampling analysis device is arranged after terminal equipment and fuel gas are mixed, hydrogen brittleness resistance of metal components of terminal process equipment is analyzed, the upper limit value of hydrogen concentration of safe mixed gas of the process equipment is obtained, the opening of an adjusting valve is adjusted, the safe mixing proportion of hydrogen and natural gas is adjusted, and the mixed gas is corrected through negative feedback adjustment until a safe and stable conveying state is achieved, so that the gas use safety of downstream users is guaranteed. The whole system is adjusted at the tail end of the user branch pipe, so that the individual analysis and regulation are carried out, and the control is more accurate.
Description
Technical Field
The invention relates to the field of energy source conveying and adjusting, in particular to a mixed gas conveying and adjusting system;
the invention also relates to a mixed gas conveying and adjusting method.
Background
The external dependence of the petroleum and natural gas in China is high, the external dependence of the natural gas in China is increased to 45.3% according to an authoritative report, the energy safety faces challenges, and as the atmospheric pollution prevention and control are increasingly concerned, the environmental constraint form is also intensified. In order to solve the environmental problem, various countries invest in research and development of natural gas-hydrogen blending.
At present, the total length of a hydrogen pipeline constructed in China is about 68 kilometers, and natural gas-hydrogen mixing is imperative to research and develop natural gas energy sources for relieving the external dependence of natural gas energy sources, relieving the problem of gas source shortage in winter and optimizing energy structures to realize energy conservation and emission reduction. At present, domestic research and development mostly focuses on improving the hydrogen blending proportion, and the hydrogen blending proportion reaches 20% internationally.
Meanwhile, at present, natural gas-hydrogen mixed gas is not actually used as primary input energy to be applied to downstream industrial production users, and in practical application, hydrogen in the mixed gas can be separated out to form hydrogen atoms under certain chemical and physical conditions, the hydrogen atoms enter a metal material and are dissolved in metal lattices, and the hydrogen atoms react with existing fine cracks in the metal material, so that the ductility and tensile strength of the material are reduced, and the brittleness of the metal material is increased.
Therefore, the metal process equipment of the downstream industrial users of the traditional natural gas pipeline is easy to generate hydrogen embrittlement with the hydrogen-natural gas mixed gas, and the process production equipment in different states is different, and the bearing degree of the hydrogen concentration of the mixed gas is different. In addition, the mixed gas of hydrogen and natural gas itself has a risk of explosion when the hydrogen exceeds the limit concentration.
Therefore, the hydrogen embrittlement hidden danger caused by the metal characteristics of different downstream equipment and the explosion limit concentration of hydrogen in mixed gas need to be considered at the same time, and a hydrogen-natural gas conveying and regulating system specially used for approaching terminal equipment is provided, so that the normal use and the safe use of the downstream terminal equipment are guaranteed.
In view of this, the present application is specifically made.
Disclosure of Invention
The invention provides a mixed gas conveying and adjusting system and a mixed gas conveying and adjusting method, wherein a sampling analysis device is arranged after terminal equipment and gas are mixed, hydrogen brittleness resistance of metal components of terminal process equipment is analyzed, the upper limit value of hydrogen concentration of safe mixed gas of the process equipment is obtained, the opening degree of an adjusting valve is adjusted, the safe mixing proportion of hydrogen and natural gas is further adjusted, and the mixed gas is corrected through negative feedback adjustment until a safe and stable conveying state is achieved, so that the gas using safety of downstream users is guaranteed. The whole system is adjusted at the tail end of the user branch pipe, so that the individual analysis and regulation are carried out, and the control is more accurate.
The specific technical scheme of the invention is as follows:
the utility model provides a governing system is carried to mixed gas, includes the gas mixing unit, conveying unit and the terminal equipment that communicate in proper order, the terminal equipment is connected with first analysis unit, first analysis unit passes through the controller and connects the gas mixing unit.
Preferably, the conveying unit is connected with a second analysis unit, and the second analysis unit is connected with the gas mixing unit through the controller.
The gas mixing unit comprises a natural gas pipeline and a hydrogen pipeline, and the natural gas pipeline and the hydrogen pipeline are respectively communicated with the conveying unit through regulating valves.
Further, the first analysis unit includes a component sensor and a first analyzer connected to each other, the component sensor being connected upstream to the terminal device, the first analyzer being connected downstream to the controller. The component sensor comprises a metal detection device, and through sampling the terminal equipment, metal components and contents (such as metal elements of Fe, Zn, Al, Cu, Sn and the like) which are easy to chemically react with hydrogen gas to cause hydrogen brittleness in the terminal equipment are detected, and data are transmitted to the first analyzer.
The conveying unit comprises a mixed gas conveying pipeline; the upstream end part of the mixed gas conveying pipeline is communicated with the regulating valve, and the downstream end part of the mixed gas conveying pipeline is communicated with the terminal equipment; and a stable gas mixing device is arranged on the gas mixture conveying pipeline.
Optionally, a mixed gas sampling device is further disposed on the mixed gas conveying pipeline upstream of the stable gas mixing device.
The second analysis unit comprises an interconnectionAnd a second analyzer, the sensor being connected upstream to the mixed gas sampling device, the second analyzer being connected downstream to the controller. The sensors are used to obtain environmental boundary parameters including pressure, temperature, composition, etc. of the natural gas and hydrogen pipelines. The second analyzer performs explosive analysis on the boundary parameters by using the Huabai number, the tempering index, the minimum ignition energy and the like to obtain an explosion limit hydrogen concentration value C of the hydrogen and natural gas mixed gas under the external actual condition0％。
The mixed gas conveying pipeline is connected with a pressure relief and gas storage device through a valve. Preferably, a first cut-off valve and a first safety protection device are arranged on a mixed gas conveying pipeline between the mixed gas sampling device and the stable gas mixing device, and a second cut-off valve and a second safety protection device are arranged on the mixed gas conveying pipeline between the connecting pressure-releasing gas storage device and the terminal equipment. More preferably, the stable gas mixing device and the gas mixing conveying pipeline connected between the pressure relief and gas storage devices are sequentially connected with a pipeline detection device and a gas leakage detector.
Preferably, the stable gas mixing device is also connected with a hydrogen-natural gas analyzer.
Preferably, the terminal equipment is further connected with a smoke analyzer.
Preferably, the terminal device is connected with the second shut-off valve and the second safety protection device through PE hoses.
The invention also provides a mixed gas conveying and adjusting method based on the system, the first analysis unit analyzes the metal components and the content of the terminal equipment, and the controller controls the hydrogen concentration in the mixed gas to be smaller than the upper limit value C of the hydrogen concentration for generating hydrogen embrittlement1％。
Further, the second analysis unit analyzes the hydrogen concentration of the mixed gas in the mixed gas sampling device and controls the hydrogen concentration to be less than the explosion limit hydrogen concentration value C through a controller0% and said C1％。
Further, controlling said C1% less than C0％。
Furthermore, the component sensor comprises a metal detection device, and through sampling the terminal equipment, metal components and content (such as metal elements of Fe, Zn, Al, Cu, Sn and the like) which are easy to react with hydrogen gas to cause hydrogen embrittlement in the terminal equipment are detected, and data are transmitted to the first analyzer.
Combining the metal components and the content, analyzing to obtain the upper limit value of the hydrogen concentration generating hydrogen embrittlement, simulating combustion characteristic parameters in a plurality of equal proportion temperature intervals in the terminal equipment operation temperature interval, and if a plurality of groups of upper limit values of the hydrogen concentration generating hydrogen embrittlement exist, performing C within the difference of +/-1 percent1% combining, taking the minimum value, and finally obtaining several groups of concentration values in simulation interval, such as C1 ’％、C1 ‘’％、C1 ’‘’% …, if necessary C1 ’％、C1 ‘’％、C1 ’‘’％…＜C0Percent to adjust the opening of the regulating valve.
The second analysis unit analyzes and obtains actual combustion characteristic parameters of the mixed gas in the mixed gas sampling device and feeds the actual combustion characteristic parameters back to the controller; and comparing the actual combustion characteristic parameters with the simulated combustion characteristic parameters to determine whether the actual combustion characteristic parameters meet the conditions, and correcting the opening degree of the regulating valve by the controller.
Further preferably, if a plurality of groups of interval parameters meet the conditions, the corresponding interval of the minimum value is taken as a target parameter for control, the opening of the regulating valve is corrected until the mixed gas meeting the process safety and the accurate concentration of the terminal equipment is obtained, and then the mixed gas is input into the stable gas mixing device.
And the hydrogen-natural gas analyzer monitors whether the mixed gas in the stable gas mixing device meets target parameters in real time, and controls the gas in the stable gas mixing device to be conveyed when the gas component change rate is less than or equal to +/-1% in 30 min.
Preferably, the pipeline detection device and the gas leakage detector monitor the mixed gas conveying pipeline, and respectively perform water conservancy pipe network calculation on the transient state and the static state, so that the real-time monitoring parameter range is ensured to accord with the target parameter, and the conveying safety of the mixed gas is ensured.
Optionally, the pressure relief gas storage device is linked with the first cut-off valve, the first safety protection device, the second cut-off valve and the second safety protection device, if an alarm occurs, the first cut-off valve and the second cut-off valve execute a command to cut off the head and the tail of the mixed gas conveying pipeline, and gas in the pipeline is relieved into the pressure relief gas storage device.
The flue gas analyzer samples and analyzes flue gas generated after combustion of the mixed gas, and the use safety of the system is guaranteed.
This application is carried the end to the pipeline and is designed, through set up sample analytical equipment after terminal equipment and gas mix, detect the hydrogen explosion limit concentration of control mixed gas on the one hand, more importantly through the hydrogen embrittlement resistance to terminal equipment metal component analysis, obtain the hydrogen concentration upper limit value of this process equipment's safe mist, this concentration value passes through sensing control system, the output signal of telecommunication is used in hydrogen respectively, the governing valve on the natural gas line, through the aperture of adjusting the governing valve, and then adjust the safe mixing proportion of hydrogen-natural gas, the mixing gas is adjusted through negative feedback again and is revised, until reaching safe and stable's transport state, guarantee downstream user's gas safety. The system is adjusted at the tail end of the branch pipe of the downstream user, so that the actual working condition is analyzed by individuals, the individual regulation and control are carried out, the system is closer to the user side, and the control is more accurate; in addition, the system is adjusted at the end of a user, the air feeding capacity of a conveying pipeline at the downstream of a natural gas valve station is not affected, and the existing gas pipeline system does not need to be modified on a large scale.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a schematic structural diagram of a mixed gas conveying and regulating system of the invention.
Description of reference numerals:
1. a mixed gas delivery line; 2. a natural gas pipeline; 3. a hydrogen gas circuit; 4. adjusting a valve; 5. a mixed gas sampling device; 6. a first shut-off valve and a first safety protection device; 7. a stable gas mixing device; 8. a hydrogen-natural gas analyzer; 9. a pipeline detection device; 10. a gas leak detector; 11. a pressure relief and gas storage device; 12. a valve; 13. a second shut-off valve and a second safety protection device; 14. a terminal device; 15. a flue gas analyzer; 16. a component sensor; 17. a first analyzer; 18. a controller; 19. a second analyzer; 20. a sensor; 21. a PE hose.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
A mixed gas conveying and regulating system is shown in figure 1 and comprises a gas mixing unit, a conveying unit and a terminal device 14 which are sequentially communicated, wherein the terminal device 14 is connected with a first analyzing unit, and the first analyzing unit is connected with the gas mixing unit through a controller 18.
The conveying unit is connected with a second analysis unit, and the second analysis unit is connected with the gas mixing unit through a controller 18.
The gas mixing unit comprises a natural gas pipeline 2 and a hydrogen pipeline 3, and the natural gas pipeline 2 and the hydrogen pipeline 3 are respectively communicated with the conveying unit through regulating valves 4.
The first analysis unit comprises a component sensor 16 and a first analyzer 17 connected to each other, the component sensor 16 being connected upstream to the terminal device 14 and the first analyzer 17 being connected downstream to the controller 18. The component sensor 16 includes a metal detection device, and by sampling the terminal device 14, detects the metal components and content in the terminal device 14, which are susceptible to chemical reaction with hydrogen gas and cause hydrogen embrittlement, and transmits the data to the first analyzer 17.
The conveying unit comprises a mixed gas conveying pipeline 1; the upstream end part of the mixed gas conveying pipeline 1 is communicated with the regulating valve 4, and the downstream end part is communicated with the terminal equipment 14; the stable gas mixing device 7 is arranged on the mixed gas conveying pipeline 1.
And a mixed gas sampling device 5 is also arranged on the mixed gas conveying pipeline 1 at the upstream of the stable gas mixing device 7.
The second analysis unit comprises a sensor 20 and a second analyzer 19 connected to each other, the sensor 20 being connected upstream to the mixed gas sampling device 5 and the second analyzer 19 being connected downstream to the controller 18. The sensor 20 is used to obtain environmental boundary parameters including the mixed pressure, temperature, composition, etc. of the natural gas pipeline 2 and the hydrogen pipeline 3. The second analyzer 19 performs explosive analysis on the boundary parameters by using the waviness number, the tempering index, the minimum ignition energy and the like to obtain an explosion limit hydrogen concentration value C of the hydrogen and natural gas mixed gas under the external actual condition0％。
The mixed gas conveying pipeline 1 is connected with a pressure relief and gas storage device 11 through a valve 12. The mixed gas conveying pipeline 1 between the mixed gas sampling device 5 and the stable gas mixing device 7 is provided with a first cut-off valve and a first safety protection device 6, and the mixed gas conveying pipeline 1 between the connecting pressure relief gas storage device 11 and the terminal equipment 14 is provided with a second cut-off valve and a second safety protection device 13. The stable gas mixing device 7 and the gas mixing conveying pipeline 1 connected between the pressure relief and gas storage devices 11 are sequentially connected with a pipeline detection device 9 and a gas leakage detector 10.
The stable gas mixing device 7 is also connected with a hydrogen-natural gas analyzer 8.
The terminal device 14 is also connected to a smoke analyser 15.
In this embodiment, the terminal device 14 is connected to the second shut-off valve and the second safety device 13 via a PE hose 21.
The embodiment also provides a mixed gas conveying and adjusting method based on the system, wherein the first analysis unit analyzes the metal components and content of the terminal equipment 14, and the controller 18 controls the mixed gasThe hydrogen concentration in the hydrogen tank is less than the upper limit value C of the hydrogen concentration for generating hydrogen embrittlement1％。
The second analysis unit analyzes the hydrogen concentration of the mixed gas in the mixed gas sampling device 5 and controls the hydrogen concentration to be less than the explosion limit hydrogen concentration value C through the controller 180% and said C1% controlling said C1% less than C0％。
The component sensor 16 includes a metal detection device, and by sampling the terminal device 14, detects the metal components and content in the terminal device 14, which are susceptible to chemical reaction with hydrogen gas and cause hydrogen embrittlement, and transmits the data to the first analyzer 17.
Combining the metal components and the content, analyzing to obtain the upper limit value of the hydrogen concentration for hydrogen embrittlement, simulating the simulated combustion characteristic parameters in four equal proportion temperature intervals between 450 ℃ and 650 ℃, and if a plurality of groups of upper limit values of the hydrogen concentration for hydrogen embrittlement occur, performing C within the difference of +/-1 percent1% combining, taking the minimum value, and finally obtaining several groups of concentration values in simulation interval, such as C1 ’％、C1 ‘’％、C1 ’‘’% …, if necessary C1 ’％、C1 ‘’％、C1 ’‘’％…＜C0Percent to adjust the opening of the regulating valve.
The combustion characteristic parameter in the present embodiment is mainly the maximum combustion average temperature TmaxMaximum combustion pressure PmaxAnd a burning rate V1And the hydrogen embrittlement characteristic of the metal concentration at the particle boundary is subjected to electron energy spectrum analysis under the four simulated combustion conditions by equipment such as a scanning electron microscope and an X-ray diffraction spectrometer and the combination of the metal components and content parameters input by the component sensor 16, so that the upper limit value of the hydrogen concentration of the mixed gas, which ensures that the equipment does not generate hydrogen embrittlement and can safely and stably operate, is obtained.
If a plurality of groups of interval parameters meet the conditions, the corresponding interval of the minimum value is taken as a target parameter for control, the first analyzer 17 transmits a plurality of groups of results to the controller 18, sequentially outputs electric signals to respectively act on the regulating valves 4 on the natural gas pipeline and the hydrogen pipeline,the hydrogen concentration of the mixed gas is adjusted by controlling the opening of the adjusting valve 4 according to the set value, the gas in the mixed gas sampling device 5 is sampled by the gas pump in the sensor 20 to sense the gas components, and the mixed gas H is obtained2-CH4The temperature, pressure, composition and concentration parameters are transmitted to a second analyzer 19, the second analyzer 19 calculates the highest combustion average temperature T 'of the actual combustion characteristic parameter of the mixed gas through electrochemical principle analysis'maxAnd maximum combustion pressure P 'of mixed gas'maxAnd mixed gas combustion rate V'1Etc. to the controller 18. And comparing the actual combustion characteristic parameters with the simulated combustion characteristic parameters to determine whether the actual combustion characteristic parameters meet the conditions, and correcting the valve opening of the regulating valve 4. Until the mixed gas meeting the process safety and accurate concentration of the terminal equipment is obtained, the mixed gas is input into a stable gas mixing device 7.
The hydrogen-natural gas analyzer 8 monitors whether the mixed gas in the stable gas mixing device 7 meets target parameters in real time, and controls the gas in the stable gas mixing device 7 to be conveyed when the gas component change rate is less than or equal to +/-1% in 30 min.
The pipeline detection device 9 and the gas leakage detector 10 monitor the mixed gas conveying pipeline 1, and respectively perform water conservancy pipe network calculation on the transient state and the static state, so that the real-time monitoring parameter range is ensured to accord with the target parameter, and the conveying safety of the mixed gas is ensured;
the pressure relief gas storage device 11 is linked with the first cut-off valve and the first safety protection device 6 as well as the second cut-off valve and the second safety protection device 13, if an alarm occurs, the first cut-off valve and the second cut-off valve execute a command to cut off the head and the tail of the mixed gas conveying pipeline 1, and gas in the pipeline is relieved to the pressure relief gas storage device 11.
The flue gas analyzer 15 samples and analyzes the flue gas generated after the mixed gas is combusted, so that the use safety of the system is guaranteed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (13)
1. The utility model provides a governing system is carried to mixed gas, its characterized in that, mixes unit, conveying unit and terminal equipment including the gas that communicates in proper order, terminal equipment is connected with first analysis unit, first analysis unit passes through the controller and connects the gas mixes the unit.
2. The mixed gas delivery regulating system of claim 1, wherein a second analyzing unit is connected to the delivery unit, and the second analyzing unit is connected to the gas mixing unit through the controller.
3. The mixed gas delivery regulating system according to claim 1 or 2, wherein the gas mixing unit comprises a natural gas pipeline and a hydrogen pipeline, which are respectively communicated with the delivery unit through regulating valves.
4. The mixed gas delivery regulating system according to claim 3, wherein the first analysis unit comprises a component sensor and a first analyzer connected to each other, the component sensor being connected upstream to the terminal device and the first analyzer being connected downstream to the controller.
5. The mixed gas delivery regulating system according to claim 3, wherein the delivery unit comprises a mixed gas delivery line; the upstream end part of the mixed gas conveying pipeline is communicated with the regulating valve, and the downstream end part of the mixed gas conveying pipeline is communicated with the terminal equipment; a stable gas mixing device is arranged on the mixed gas conveying pipeline;
preferably, a mixed gas sampling device is further arranged on the mixed gas conveying pipeline upstream of the stable gas mixing device.
6. The mixed gas delivery regulating system of claim 5, wherein the second analysis unit comprises a sensor and a second analyzer connected to each other, the sensor being connected upstream to the mixed gas sampling device and the second analyzer being connected downstream to the controller.
7. The mixed gas conveying and adjusting system according to claim 5, wherein the mixed gas conveying pipeline is connected with a pressure relief and gas storage device through a valve;
preferably, a first cut-off valve and a first safety protection device are arranged on a mixed gas conveying pipeline between the mixed gas sampling device and the stable gas mixing device, and a second cut-off valve and a second safety protection device are arranged on the mixed gas conveying pipeline between the pressure relief gas storage device and the terminal equipment;
preferably, the stable gas mixing device and the gas mixing conveying pipeline connected between the pressure relief and gas storage devices are sequentially connected with a pipeline detection device and a gas leakage detector.
8. The mixed gas conveying and regulating system according to claim 5, wherein the stable gas mixing device is connected with a hydrogen-natural gas analyzer;
preferably, the terminal equipment is further connected with a smoke analyzer.
9. A mixed gas conveying regulation method based on the system of any one of claims 1 to 8, characterized in that the first analysis unit analyzes the metal components and content of the terminal equipment, and the controller controls the hydrogen concentration in the mixed gas to be lower than the upper limit value C of the hydrogen concentration for hydrogen embrittlement1％；
Preferably, the second analysis unit analyzes the hydrogen concentration of the mixed gas in the mixed gas sampling device and controls the hydrogen concentration to be less than the explosion limit hydrogen concentration value C through a controller0% and said C1％。
10. The mixed gas delivery regulating method according to claim 9, wherein C is1% less than C0％。
11. The mixed gas transportation regulation method according to claim 10, wherein the upper limit of hydrogen concentration for hydrogen embrittlement is analyzed by combining the metal components and contents, the simulated combustion characteristic parameters in a plurality of temperature intervals with equal proportion are simulated in the terminal equipment operation temperature interval, and if a plurality of groups of upper limit of hydrogen concentration for hydrogen embrittlement occur, the C is performed within a difference of +/-1 percent1% merging, taking the minimum value, and finally obtaining a plurality of groups of concentration values of the simulation intervals so as to adjust the opening degree of the regulating valve;
preferably, the second analysis unit analyzes and obtains an actual combustion characteristic parameter of the mixed gas in the mixed gas sampling device, and feeds the actual combustion characteristic parameter back to the controller; comparing the actual combustion characteristic parameter with the simulated combustion characteristic parameter to determine whether the actual combustion characteristic parameter meets the condition, and correcting the opening of the regulating valve by the controller;
further preferably, if a plurality of groups of interval parameters meet the conditions, the corresponding interval of the minimum value is taken as a target parameter for control, the opening of the regulating valve is corrected until the mixed gas meeting the process safety and the accurate concentration of the terminal equipment is obtained, and then the mixed gas is input into the stable gas mixing device.
12. The mixed gas conveying and adjusting method according to claim 9, wherein the hydrogen-natural gas analyzer monitors whether the mixed gas in the stable gas mixing device meets target parameters in real time, and controls the gas in the stable gas mixing device to be conveyed when the gas composition change rate in 30min is less than or equal to ± 1%;
preferably, the pipeline detection device and the gas leakage detector monitor the mixed gas conveying pipeline, and respectively perform water conservancy pipe network calculation on the transient state and the static state, so as to ensure that the real-time monitoring parameter range conforms to a target parameter and ensure the conveying safety of the mixed gas;
preferably, the pressure relief and gas storage device is linked with the first cut-off valve, the first safety protection device, the second cut-off valve and the second safety protection device, if an alarm occurs, the first cut-off valve and the second cut-off valve execute a command to cut off the head and the tail of the mixed gas conveying pipeline, and gas in the pipeline is relieved to the pressure relief and gas storage device.
13. The mixed gas conveying and adjusting method according to claim 9, wherein the flue gas analyzer performs sampling analysis on flue gas generated by combustion of the mixed gas, so as to ensure the use safety of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110196790.5A CN112833334A (en) | 2021-02-22 | 2021-02-22 | Mixed gas conveying and adjusting system and adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196790.5A CN112833334A (en) | 2021-02-22 | 2021-02-22 | Mixed gas conveying and adjusting system and adjusting method |
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| CN113341060A (en) * | 2021-06-11 | 2021-09-03 | 中国石油大学(华东) | Medium-low pressure hydrogen-containing pipeline experiment system and method |
| CN113617234A (en) * | 2021-08-27 | 2021-11-09 | 上海发电设备成套设计研究院有限责任公司 | Hydrogen-mixed fuel generating device and method |
| CN114811699A (en) * | 2022-04-21 | 2022-07-29 | 山东省节能技术研究院 | Shallow hydrogen energy absorption type air source heat pump system |
| CN116452831A (en) * | 2023-04-27 | 2023-07-18 | 中国长江三峡集团有限公司 | Natural gas hydrogen-adding combustion system adjusting method and device and electronic equipment |
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