CN220355158U - Heat value and hydrogen loading content control system of hydrogen-mixed natural gas - Google Patents
Heat value and hydrogen loading content control system of hydrogen-mixed natural gas Download PDFInfo
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- CN220355158U CN220355158U CN202321462324.8U CN202321462324U CN220355158U CN 220355158 U CN220355158 U CN 220355158U CN 202321462324 U CN202321462324 U CN 202321462324U CN 220355158 U CN220355158 U CN 220355158U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 142
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000001257 hydrogen Substances 0.000 title claims abstract description 109
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 109
- 239000003345 natural gas Substances 0.000 title claims abstract description 71
- 239000007789 gas Substances 0.000 claims abstract description 61
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 48
- 230000006854 communication Effects 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a heating value and hydrogen content control system of mixed hydrogen natural gas, which comprises a mixed hydrogen natural gas tank, a hydrogen main pipeline and a natural gas main pipeline, wherein the mixed hydrogen natural gas tank is respectively communicated with the hydrogen main pipeline; the gas collection module is connected with the upstream control module through the calculation module, the upstream control module is respectively in communication connection with the hydrogen gas inlet proportion control valve and the natural gas inlet proportion control valve, and the opening sizes of the hydrogen gas inlet proportion control valve and the natural gas inlet proportion control valve are controlled according to data feedback calculated by the calculation module.
Description
Technical Field
The utility model relates to a control system of hydrogen-mixed natural gas, in particular to a control system of the heat value and the hydrogen-doped content of the hydrogen-mixed natural gas.
Background
The hydrogen energy is clean and efficient energy, has rich resources and wide sources, can be prepared by utilizing other energy sources through a certain method, is an ideal interconnection medium for promoting the clean and efficient utilization of traditional fossil energy and supporting the large-scale development of renewable energy, and is one of important carriers for constructing a future sustainable development energy system. However, the transportation cost of hydrogen is too high, which always restricts the pain point of the development. The hydrogen transportation mode mainly comprises gas storage and transportation (long tube trailer, pipeline), liquid hydrogen storage and transportation, organic liquid storage and transportation and the like, wherein the pipeline transportation is the mode with the lowest cost and the most development potential in large-scale long-distance transportation. The pure hydrogen pipeline has high construction and operation cost, and the transportation method adopted at present is to utilize the existing natural gas pipeline network to mix hydrogen for transportation, and the method can be used as a good transition method for solving the large-scale long-distance hydrogen transportation.
The natural gas is hydrogen-doped, hydrogen is mixed into natural gas according to a certain volume ratio to form hydrogen-doped natural gas, and the hydrogen-doped natural gas is conveyed to terminal separation or direct combustion through the existing natural gas pipeline, so that the hydrogen transportation cost is reduced. However, after the active hydrogen is mixed with the natural gas, problems such as increased leakage rate, increased combustibility range, reduced ignition energy of the mixed gas, increased combustion rate and the like can be caused, and the mixed gas is required to be monitored in the conveying process in the face of higher risks such as leakage, combustion, explosion and the like.
The most important monitoring indexes in the blending process are the heat value and the hydrogen content of the natural gas.
(1) The heating value of pure hydrogen is about 1/3 of the heating value of natural gas, so that the heating value of natural gas is correspondingly reduced along with the doping of hydrogen. However, the natural gas transported by the tube has definite requirements on the gas heating value and the interchangeability of the natural gas transported by the hydrogen mixing tube, so that the heating value of the natural gas after hydrogen mixing needs to be strictly monitored, and the requirements are ensured to be met;
(2) The incorporation of hydrogen gas has various effects on the pipeline, such as pipeline hydrogen embrittlement, increased leakage speed, and increased flammability range, and therefore requires strict monitoring of the content of incorporated hydrogen gas during the blending process.
Currently, when monitoring the calorific value and the hydrogen loading content of the natural gas mixed with hydrogen, a method is generally adopted in which a calorific value meter and a hydrogen analyzer are arranged behind a static mixing tank. Because the calorific value instrument can only measure the calorific value of the mixed gas, but the content of hydrogen in the mixed gas cannot be obtained, the hydrogen analyzer is also needed to analyze the content of the hydrogen in the mixed gas, and in this way, the pipeline structure is complicated, the cost of equipment is greatly increased, the maintenance difficulty is high, and meanwhile, the uncertainty factor is brought to the feedback control due to the asynchronous analysis periods of the calorific value instrument and the hydrogen analyzer.
Disclosure of Invention
The utility model provides a control system for the heat value and the hydrogen content of natural gas mixed with hydrogen, which can detect the heat value and the hydrogen content of the mixed gas at the same time, synchronously feed back the detection result to an upstream control center, and regulate and control the heat value and the hydrogen content of the mixed gas through the upstream control center, and the technical scheme is as follows:
the system comprises a hydrogen mixing natural gas tank, wherein the hydrogen mixing natural gas tank is provided with two gas inlets which are respectively communicated with a hydrogen main pipeline and a natural gas main pipeline, a hydrogen gas inlet proportion control valve is arranged on the hydrogen main pipeline, a natural gas inlet proportion control valve is arranged on the natural gas main pipeline, an outlet of the hydrogen mixing natural gas tank is connected with a mixed gas outlet pipe, and a gas acquisition module is arranged on the mixed gas outlet pipe and used for measuring the viscosity value and the hydrogen content of the mixed gas; the gas collection module is connected with the upstream control module through the calculation module, and the upstream control module is connected with the hydrogen gas inlet proportion control valve and the natural gas inlet proportion control valve.
The system also comprises a communication module, wherein the calculation module is connected with the upstream control module through the communication module, and the communication module is used for transmitting the data of the calculation module to the upstream control module.
And the communication module transmits the data of the calculation module to the upstream control module at intervals of 0.5s-2s.
Further, the communication interface is: an RS485 communication interface, a 4-20mA communication interface or a wireless network communication interface.
The system also comprises a storage module which is respectively connected with the communication module and the upstream control module in a communication way and is used for storing historical data of the calculation module and the upstream communication module.
The gas collection module includes: a viscosity sensor for measuring a viscosity value of the mixed gas, a hydrogen sensor for measuring a hydrogen content in the mixed gas.
The computing module includes: a heat value calculation unit for calculating the heat value of the mixed gas according to the gas viscosity value measured by the viscosity sensor; the hydrogen detection unit is used for receiving the hydrogen content value transmitted by the gas acquisition module, the calculation information conversion unit is used for converting the calculated heat value of the heat value calculation unit and the hydrogen content value received by the hydrogen detection unit into identifiable electric signals, and the identifiable electric signals are transmitted to the upstream control module through the communication module.
The computing module adopts an ARM chip or adopts stm32f103 series single-chip microcomputer, so that system integration can be realized, and portability and miniaturization of the system are realized.
The upstream control module adopts an industrial personal computer provided with a display, so that operators can know various running values of the current system in real time and set parameters.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a control system for the heat value and the hydrogen content of mixed natural gas, which can detect the heat value and the hydrogen content of the mixed gas at the same time, and feed back the detection result to an upstream control center, and the opening of a hydrogen gas inlet proportion control valve and the opening of a natural gas inlet proportion are controlled by the upstream control center, so that the aim of regulating and controlling the heat value and the hydrogen content of the mixed gas is fulfilled, and only one device is needed to be installed in a pipeline, so that the cost can be greatly reduced, the installation space can be saved, and the system has the advantages of simple structure and easiness in operation.
Drawings
FIG. 1 is a schematic diagram of a control system according to the present utility model;
FIG. 2 is a schematic diagram of the overall structure of a pipeline of the hydrogen-mixed natural gas;
in the figure, 1. An upstream control module; 2. a natural gas inlet proportion control valve; 3. a natural gas inlet control hand valve; 4. a communication interface; 5. the mixed gas is discharged to control a hand valve; 6. a gas collection module; 7. a natural hydrogen tank for mixing hydrogen; 8. a hydrogen gas inlet control hand valve; 9. and a hydrogen inlet ratio control valve.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
A first embodiment of the utility model is shown in fig. 1.
A heating value and hydrogen loading control system for a hydrogen-blended natural gas, comprising: the hydrogen mixing natural gas tank 7, the import of hydrogen mixing natural gas tank 7 is provided with two, communicates hydrogen trunk line and natural gas trunk line respectively, is provided with hydrogen ratio control valve 9 that admits air on the hydrogen trunk line, is equipped with natural gas ratio control valve 2 that admits air at the natural gas trunk line, and the exit linkage of hydrogen mixing natural gas tank 7 has mixed outlet duct, is provided with gas acquisition module 6 on the mixed outlet duct, and gas acquisition module 6 passes through calculation module and connects upstream control module 1, and upstream control module 1 is connected with ratio control valve 9, natural gas ratio control valve 2 that admits air.
Further, a natural gas inlet control hand valve 3 is arranged between the natural gas inlet proportional control valve 2 and the hydrogen mixing natural gas tank 7 and is used for controlling the on-off of a natural gas main pipeline; a hydrogen gas inlet control hand valve 8 is arranged between the hydrogen gas inlet proportion control valve 9 and the hydrogen mixing natural gas tank 7 and is used for controlling the on-off of a hydrogen main pipeline; the rear end of the gas collection module 6 is provided with a mixed gas outlet control hand valve 5 for controlling the on-off of the mixed gas outlet pipe along the flowing direction of the mixed hydrogen natural gas.
Further, a natural gas check valve is also arranged on the pipeline at the front end of the natural gas inlet proportion control valve 2; a hydrogen check valve is also arranged on the pipeline at the front end of the hydrogen inlet proportion control valve 9.
As shown in fig. 2, the system further includes a communication module between the calculation module and the upstream control module, where the calculation module is connected to the upstream control module through the communication module, and the communication module is configured to transmit data of the calculation module to the upstream control module, and further, each time interval of transmitting data of the calculation module to the upstream control module by the communication module is 0.5s-2s, and preferably, each time interval is 1s.
The communication module is connected with the upstream control module 1 through a communication interface 4, and specifically, the communication interface is: the RS485 communication interface, the 4-20mA communication interface, or the wireless network communication interface, in practice, the upstream control module 1 may adapt according to its own needs.
As shown in fig. 2, the system further comprises a storage module, wherein the storage module is respectively connected with the communication module and the upstream control module and is used for storing historical data of the calculation module and the upstream communication module.
The gas collection module 6 is used for measuring the viscosity value and the hydrogen content of the mixed gas, converting the information of the viscosity value and the hydrogen content into identifiable electric signals and outputting the identifiable electric signals to the calculation module, calculating the heat value of the mixed gas according to the viscosity value measured by the gas collection module, converting the information of the heat value and the hydrogen content into identifiable electric signals and outputting the identifiable electric signals to the upstream control module 1, and controlling the opening sizes of the hydrogen gas inlet proportional control valve 9 and the natural gas inlet proportional control valve 2 by the upstream control module 1 according to the data calculated by the calculation module.
Further, the gas collection module 6 includes: a viscosity sensor for measuring the viscosity of the mixed gas, a hydrogen sensor for measuring the hydrogen content in the mixed gas.
The computing module includes: a heat value calculation unit for calculating the heat value of the mixed gas according to the gas viscosity value measured by the viscosity sensor; the hydrogen detection unit is used for receiving the hydrogen content value transmitted by the gas acquisition module, calculating the information conversion unit, converting the calculated heat value of the heat value calculation unit and the hydrogen content value received by the hydrogen detection unit into identifiable electric signals, and sending the identifiable electric signals converted by the calculation information conversion unit to the upstream control module 1 through the communication module, wherein the upstream control module 1 controls the opening sizes of the hydrogen inlet proportional control valve 9 and the natural gas inlet proportional control valve 2.
During operation, the viscosity value and the hydrogen content of the mixed gas are measured respectively through a viscosity sensor and a hydrogen sensor arranged in the gas acquisition module 6, and the heat value of the mixed gas is calculated through a heat value calculation unit by combining the gas viscosity value measured by the viscosity sensor with physical parameters of the mixed gas, wherein the physical parameters comprise conventional parameters such as temperature, pressure, humidity and the like; the calculated information conversion unit converts the calculated heat value of the heat value calculation unit and the hydrogen content value received by the hydrogen detection unit into identifiable electric signals, the identifiable electric signals are transmitted to the upstream control module 1 through the communication module, and the upstream control module 1 obtains the opening adjusting direction and the adjusting proportion of the proportional control valves on the hydrogen main pipeline and the natural gas main pipeline according to preset parameters. Wherein, an operator sets the heat value and the hydrogen content of the natural gas in the control pipeline in advance through a touch screen, and after the heat value signal and the hydrogen content signal are uploaded to the upstream control module, performing numerical comparison with a preset value. When the numerical comparison result shows that the hydrogen content in the pipeline is higher than the preset value and the heat value is lower than the preset value, the opening of the hydrogen gas inlet proportional control valve 9 can be reduced, and the opening of the natural gas inlet proportional control valve 2 can be increased; when the numerical comparison result shows that the hydrogen content of the pipeline is lower than the preset value and the heat value is higher than the preset value, the opening of the hydrogen gas inlet proportion control valve 9 can be increased, and the opening of the natural gas inlet proportion control valve 2 can be reduced. The change amount of the opening of each pipeline proportional control valve is calculated by the numerical comparison result.
In addition, the utility model uploads the data to the upstream control module 1 once every second in the communication process, and all the information is uploaded synchronously, so the upstream control module 1 can receive the data in time and control the opening degree of the pipeline, and the condition of imbalance of the heat value and the hydrogen content of the mixed gas caused by untimely updating of the data is avoided. Meanwhile, in order to facilitate the user to inquire the history record, the utility model also designs a storage module for storing the history data of the calculation module and the upstream control module, and the user can check at any time.
The utility model provides a control system for the heat value and the hydrogen content of mixed natural gas, which can feed back the measured heat value and the measured hydrogen content of the mixed gas to an upstream control center, and regulate and control the heat value and the hydrogen content of the mixed gas through the upstream control center.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.
Claims (9)
1. The utility model provides a mix calorific value of hydrogen natural gas and hydrogen content control system that mixes, includes the hydrogen natural gas jar, and it is provided with two air inlets, communicates hydrogen trunk line and natural gas trunk line respectively, is provided with hydrogen ratio control valve that admits air on the hydrogen trunk line, is equipped with natural gas ratio control valve that admits air at the natural gas trunk line, and the exit linkage of hydrogen natural gas jar has mixed outlet duct, its characterized in that: the mixed gas outlet pipe is provided with a gas acquisition module for measuring the gas viscosity value and the hydrogen content of the mixed gas; the gas collection module is connected with the upstream control module through the calculation module, and the upstream control module is connected with the hydrogen gas inlet proportion control valve and the natural gas inlet proportion control valve.
2. The system of claim 1, further comprising a communication module, wherein the calculation module is connected to the upstream control module via the communication module, and wherein the communication module is configured to transmit data from the calculation module to the upstream control module.
3. The system of claim 2, wherein each time interval the communication module transmits data from the calculation module to the upstream control module is 0.5s-2s.
4. The system of claim 2, wherein the communication module and the upstream control module are communicatively coupled via an RS485 communication interface, a 4-20mA communication interface, or a wireless network communication interface.
5. The system for controlling the heating value and the hydrogen loading content of the natural gas mixed with hydrogen according to claim 2, further comprising a storage module in communication connection with the communication module and the upstream control module, respectively, for storing historical data of the calculation module and the upstream communication module.
6. The system for controlling the heating value and hydrogen loading content of a hydrogen-blended natural gas according to claim 2, wherein the gas collection module comprises: a gas viscosity sensor for measuring a viscosity value of the mixed gas, a hydrogen sensor for measuring a hydrogen content in the mixed gas.
7. The system for heating value and hydrogen loading control of hydrogen blended natural gas according to claim 6, wherein the calculation module comprises: a heat value calculation unit for calculating the heat value of the mixed gas according to the gas viscosity value measured by the viscosity sensor; the hydrogen detection unit is used for receiving the hydrogen content value transmitted by the gas acquisition module, the calculation information conversion unit is used for converting the calculated heat value of the heat value calculation unit and the hydrogen content value received by the hydrogen detection unit into identifiable electric signals, and the identifiable electric signals are transmitted to the upstream control module through the communication module.
8. The system for controlling the heating value and the hydrogen loading content of the hydrogen-mixed natural gas according to any one of claims 1 to 7, wherein the computing module adopts an ARM chip or adopts a stm32f103 series singlechip, so that system integration can be realized, and portability and miniaturization of the system can be realized.
9. The system of claim 8, wherein the upstream control module is an industrial personal computer with a display for the operator to know the running values and parameters of the current system in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462324.8U CN220355158U (en) | 2023-06-09 | 2023-06-09 | Heat value and hydrogen loading content control system of hydrogen-mixed natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462324.8U CN220355158U (en) | 2023-06-09 | 2023-06-09 | Heat value and hydrogen loading content control system of hydrogen-mixed natural gas |
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| CN220355158U true CN220355158U (en) | 2024-01-16 |
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| CN202321462324.8U Active CN220355158U (en) | 2023-06-09 | 2023-06-09 | Heat value and hydrogen loading content control system of hydrogen-mixed natural gas |
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- 2023-06-09 CN CN202321462324.8U patent/CN220355158U/en active Active
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