CN216769081U - Natural gas on-line monitoring device - Google Patents
Natural gas on-line monitoring device Download PDFInfo
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- CN216769081U CN216769081U CN202220060406.9U CN202220060406U CN216769081U CN 216769081 U CN216769081 U CN 216769081U CN 202220060406 U CN202220060406 U CN 202220060406U CN 216769081 U CN216769081 U CN 216769081U
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Abstract
A natural gas on-line monitoring device relates to the field of natural gas and aims to meet the requirements of the natural gas on-line monitoring device in the process of measuring the accurate amount of natural gas energy and measuring the heat value of the natural gas reliably. In the device: the signal input or output end of the gas circuit control unit is connected with the signal output or input end of the MCU control unit; the pressure sensor, the temperature sensor and the methane sensor are all arranged on the natural gas pipeline, are respectively used for measuring the pressure, the temperature and the methane concentration of the natural gas pipeline and sending the measured pressure, the temperature and the methane concentration to the MCU control unit, and the data input or output end of the man-machine interaction unit is connected with the data output or input end of the MCU control unit; and the communication data input or output end of the communication unit is connected with the communication data output or input end of the MCU control unit. The method is suitable for on-line monitoring of the natural gas in the process of accurate measurement of the energy of the natural gas and reliable measurement of the calorific value of the natural gas.
Description
Technical Field
The utility model relates to the field of natural gas, in particular to a natural gas sample monitoring technology.
Background
The natural gas refers to all gases naturally existing in nature, and comprises various gases formed in natural processes in an atmospheric space, a water space and a rock space, including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like. The definition of "natural gas" which has been common for a long time is a narrow definition from the energy point of view, and refers to a mixture of hydrocarbon and non-hydrocarbon gases which are naturally trapped in the formation.
The monitoring of natural gas is of great significance in the whole field of natural gas.
At present, however, natural gas is still relatively primitive to monitor, mainly by using a gas chromatograph to perform real-time analysis, and further, the collected gas sample is transported to a laboratory to perform component analysis and calculate a calorific value.
However, a gas chromatographic analyzer is used for calculating the heat value, the analyzed gas sample is a real-time gas sample in a gas transmission pipeline, the gas sample is just a sample at a certain time point, and is not representative, and the analysis result can effectively monitor the quality of natural gas but cannot be used as heat value data of energy measurement; and although the continuous accumulation sampler can realize the collection of the whole gas sample in a specified period, the analysis and the transportation of the gas sample are difficult, an analysis laboratory needs to be established and the gas sample is transported to the laboratory for analysis, and the transportation of the gas sample as a hazardous chemical substance is difficult.
With the large-scale development of computer technology and the common application of wired and wireless communication technology, the development opportunity of natural gas monitoring technology is given.
Therefore, there is a need for an on-line monitoring device for natural gas to accommodate accurate metering of natural gas energy and reliable measurement of the heating value of natural gas.
Disclosure of Invention
The utility model provides the natural gas on-line monitoring device in order to meet the requirements of the natural gas on-line monitoring device in the process of accurate measurement of natural gas energy and reliable measurement of the heat value of natural gas.
The technical scheme is as follows:
the natural gas on-line monitoring device comprises a natural gas pipeline 1, a natural gas sample collecting branch pipeline 2 and a chromatographic analysis unit (3), wherein a gas outlet is formed in the natural gas pipeline 1, and a gas inlet of the natural gas sample collecting branch pipeline 2 is communicated with the gas outlet in the natural gas pipeline 1; the gas outlet of the natural gas sample collecting branch pipeline 2 is communicated with the gas inlet of the chromatographic analysis unit 3; the chromatographic analysis unit 3 is used for identifying the chromatogram of the natural gas, and is characterized in that: the natural gas online monitoring device also comprises an accumulated gas sample collecting device 10, a gas circuit control unit 4, an MCU (micro control unit) control unit 5, a man-machine interaction unit 6, a communication unit 7, a pressure sensor 11, a temperature sensor 12 and a methane sensor 13;
the natural gas sample collection branch pipeline 2 is communicated with the gas inlet of the chromatographic analysis unit (3) through a first gas outlet of the accumulated gas sample collection device 10;
the gas path control unit 4 is used for controlling the accumulated gas sample collection device 10 to collect gas samples;
the signal input or output end of the gas circuit control unit 4 is connected with the signal output or input end of the MCU control unit 5;
the signal input or output end of the chromatographic analysis unit of the MCU control unit 5 is connected with the signal output or input end of the chromatographic analysis unit 3;
the pressure sensor 11 and the temperature sensor 12 are both arranged on the natural gas pipeline 1 and are respectively used for measuring the pressure and the temperature of the natural gas pipeline (1), and the pressure data output end of the pressure sensor 11 is connected with the pressure data input end of the MCU control unit 5;
the temperature data output end of the temperature sensor 12 is connected with the temperature data input end of the MCU control unit 5;
the methane sensor 13 is arranged at the joint of the natural gas pipeline 1 and the natural gas sample collecting branch pipeline 2 and is used for measuring the methane concentration data of the environment where the methane sensor is positioned,
the methane concentration data output end of the methane sensor 13 is connected with the methane concentration data input end of the MCU control unit (5);
the data input or output end of the human-computer interaction unit 6 is connected with the data output or input end of the MCU control unit 5;
and the communication data input or output end of the communication unit 7 is connected with the communication data output or input end of the MCU control unit 5.
The utility model has the beneficial effects that: the utility model realizes the automatic collection and monitoring of the natural gas sample, and fully meets the requirements of the natural gas on-line monitoring device in the process of accurate measurement of natural gas energy and reliable measurement of the heat value of the natural gas.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the gas path structure of the accumulated gas sample collection device 1.
Detailed Description
In a first specific embodiment, the first specific embodiment is described with reference to fig. 1, and the natural gas online monitoring device includes a natural gas pipeline 1, a natural gas sample collecting branch pipeline 2 and a chromatographic analysis unit 3, wherein an air outlet is formed in the natural gas pipeline 1, and an air inlet of the natural gas sample collecting branch pipeline (2) is communicated with an air outlet on the natural gas pipeline 1; the gas outlet of the natural gas sample collection branch pipeline (2) is communicated with the gas inlet of the chromatographic analysis unit 3); the chromatographic analysis unit 3 is used for identifying the chromatogram of the natural gas, and is characterized in that: the natural gas on-line monitoring device also comprises an accumulated gas sample collecting device 10, a gas circuit control unit 4, an MCU (microprogrammed control Unit) control unit 5, a human-computer interaction unit 6, a communication unit 7, a pressure sensor 11, a temperature sensor 12 and a methane sensor 13;
the natural gas sample collection branch pipeline 2 is communicated with the gas inlet of the chromatographic analysis unit 3 through a first gas outlet of the accumulated gas sample collection device 10;
the gas path control unit 4 is used for controlling the accumulated gas sample collection device 10 to collect gas samples;
the signal input or output end of the gas circuit control unit 4 is connected with the signal output or input end of the MCU control unit 5;
the signal input or output end of the chromatographic analysis unit of the MCU control unit 5 is connected with the signal output or input end of the chromatographic analysis unit 3;
the pressure sensor 11 and the temperature sensor 12 are both arranged on the natural gas pipeline 1 and are respectively used for measuring the pressure and the temperature of the natural gas pipeline (1), and the pressure data output end of the pressure sensor 11 is connected with the pressure data input end of the MCU control unit 5;
the temperature data output end of the temperature sensor 12 is connected with the temperature data input end of the MCU control unit 5;
the methane sensor 13 is arranged at the joint of the natural gas pipeline 1 and the natural gas sample collecting branch pipeline 2 and is used for measuring the methane concentration data of the environment where the methane sensor is positioned,
the methane concentration data output end of the methane sensor 13 is connected with the methane concentration data input end of the MCU control unit 5;
the data input or output end of the human-computer interaction unit 6 is connected with the data output or input end of the MCU control unit 5;
and the communication data input or output end of the communication unit 7 is connected with the communication data output or input end of the MCU control unit 5.
In this embodiment, the communication unit 7 may be a wired or wireless communication unit.
In the specific embodiment, on-site natural gas on-line monitoring is realized through the human-computer interaction unit 6;
the remote natural gas on-line monitoring is realized through the communication unit (7);
the working principle is as follows: the design adopts a structure of gas chromatography analysis module, accumulative sampling and gas circuit control, can monitor various data such as pressure, temperature and the like of natural gas while performing real-time gas chromatography analysis, and fully meets the requirements of a natural gas online monitoring device in the reliable measurement process of the accurate measurement of natural gas energy and the heat value of the natural gas.
The natural gas online monitoring device in the second embodiment and the first embodiment is different in that the natural gas online monitoring device further includes a data storage unit 8, and a data storage signal input or output end of the data storage unit 8 is connected with a data storage signal output or input end of the MCU control unit 5.
The third embodiment, the present embodiment and the second embodiment are different in that the online natural gas monitoring device further includes a gas sample storage unit (9), and an air inlet of the gas sample storage unit 9 is communicated with an air outlet of the second accumulated gas sample collecting device (10).
Fourth embodiment, the difference between the online natural gas monitoring device in this embodiment and the third embodiment is that the accumulated gas sample collecting device 1 includes a first electronic control valve V1, a second electronic control valve V2, a third electronic control valve V3, a fourth electronic control valve V4, a fifth electronic control valve V5, a sixth electronic control valve V6, and an air pump,
the gas inlet of the first electric control valve V1 and the gas inlet of the second electric control valve V2 are gas sample gas inlets of an accumulated gas sample collecting device 10, the gas sample gas inlets are communicated with a gas outlet of a natural gas sample collecting branch pipeline 2, the gas outlet of the first electric control valve V1 is communicated with a gas inlet of the second electric control valve V2, the gas outlet of the first electric control valve V1 is communicated with a gas inlet of a third electric control valve V3, the gas outlet of the third electric control valve V3 is communicated with a gas inlet of a fourth electric control valve V4, the gas outlet of the second electric control valve V2 is communicated with a gas inlet of a fourth electric control valve V4, the gas outlet of the fourth electric control valve V4 is a gas outlet of the accumulated gas sample collecting device 10, the gas outlet of the gas sample storage unit 9 is communicated with a gas inlet of a sixth electric control valve V6, the gas outlet of the sixth electric control valve V6 is communicated with a gas inlet of the fifth electric control valve V5, the second air outlet of the third electric control valve V3 is the first air outlet of the accumulated gas sample collecting device 10, and the air outlet of the sixth electric control valve V6 is communicated with the air pump.
In the present embodiment:
the gas chromatographic analysis module carries out real-time gas sample analysis principle, and specifically comprises the following steps:
a gas sample enters the chromatographic analysis module 3 from the gas inlet 1 through the first electric control valve V1 and the third electric control valve V3 for real-time gas sample analysis, and a sample gas outlet of the chromatographic analysis module is communicated with air through the fifth electric control valve V5 for exhaust.
The accumulated gas sample collection principle specifically comprises the following steps:
the gas sample enters a gas sample storage unit from an air inlet through a second electric control valve V2 and a fourth electric control valve V4, the other end of the gas sample storage unit is connected with an air pump through a sixth electric control valve V6, the MCU control unit performs data interaction with the air pump, flow rate control is performed, and accumulated gas sample collection is realized according to a set mode.
Claims (4)
1. The natural gas on-line monitoring device comprises a natural gas pipeline (1), a natural gas sample collecting branch pipeline (2) and a chromatographic analysis unit (3), wherein a gas outlet is formed in the natural gas pipeline (1), and a gas inlet of the natural gas sample collecting branch pipeline (2) is communicated with the gas outlet in the natural gas pipeline (1); the gas outlet of the natural gas sample collection branch pipeline (2) is communicated with the gas inlet of the chromatographic analysis unit (3); the chromatographic analysis unit (3) is used for identifying the chromatogram of the natural gas, and is characterized in that: the natural gas on-line monitoring device also comprises an accumulated gas sample collecting device (10), a gas circuit control unit (4), an MCU control unit (5), a man-machine interaction unit (6), a communication unit (7), a pressure sensor (11), a temperature sensor (12) and a methane sensor (13);
the natural gas sample collection branch pipeline (2) is communicated with the gas inlet of the chromatographic analysis unit (3) through a first gas outlet of the accumulated gas sample collection device (10);
the gas circuit control unit (4) is used for controlling the accumulated gas sample collection device (10) to collect gas samples;
the signal input or output end of the gas circuit control unit (4) is connected with the signal output or input end of the MCU control unit (5);
the signal input or output end of the chromatographic analysis unit of the MCU control unit (5) is connected with the signal output or input end of the chromatographic analysis unit (3);
the pressure sensor (11) and the temperature sensor (12) are arranged on the natural gas pipeline (1) and are respectively used for measuring the pressure and the temperature of the natural gas pipeline (1), and the pressure data output end of the pressure sensor (11) is connected with the pressure data input end of the MCU control unit (5);
the temperature data output end of the temperature sensor (12) is connected with the temperature data input end of the MCU control unit (5);
the methane sensor (13) is arranged at the joint of the natural gas pipeline (1) and the natural gas sample collecting branch pipeline (2) and is used for measuring the methane concentration data of the environment where the methane sensor is positioned,
the methane concentration data output end of the methane sensor (13) is connected with the methane concentration data input end of the MCU control unit (5);
the data input or output end of the human-computer interaction unit (6) is connected with the data output or input end of the MCU control unit (5);
and the communication data input or output end of the communication unit (7) is connected with the communication data output or input end of the MCU control unit (5).
2. The on-line natural gas monitoring device according to claim 1, characterized in that it further comprises a data storage unit (8), and the data storage signal input or output end of the data storage unit (8) is connected with the data storage signal output or input end of the MCU control unit (5).
3. The on-line natural gas monitoring device according to claim 2, further comprising a gas sample storage unit (9), wherein a gas inlet of the gas sample storage unit (9) is communicated with a second gas outlet of the accumulated gas sample collecting device (10).
4. The natural gas online monitoring device according to claim 3, wherein the accumulated gas sample collecting device comprises a first electric control valve (V1), a second electric control valve (V2), a third electric control valve (V3), a fourth electric control valve (V4), a fifth electric control valve (V5), a sixth electric control valve (V6) and an air pump,
the gas inlet of the first electric control valve (V1) and the gas inlet of the second electric control valve (V2) are gas sample gas inlets of an accumulated gas sample collecting device (10), the gas sample gas inlets are communicated with a gas outlet of a natural gas sample collecting branch pipeline (2), a gas outlet of the first electric control valve (V1) is communicated with a gas inlet of the second electric control valve (V2), a gas outlet of the first electric control valve (V1) is communicated with a gas inlet of the third electric control valve (V3), a gas outlet of the third electric control valve (V3) is communicated with a gas inlet of the fourth electric control valve (V4), a gas outlet of the second electric control valve (V2) is communicated with a gas inlet of the fourth electric control valve (V4), a gas outlet of the fourth electric control valve (V4) is a gas outlet of the accumulated gas sample collecting device (10), a gas outlet of the gas sample storage unit (9) is communicated with an electric control valve (V6), no. one gas outlet of No. six automatically controlled valve (V6) with the air inlet intercommunication of No. five automatically controlled valve (V5), No. two gas outlets of No. three automatically controlled valve (V3) are No. one gas outlet of accumulation gas appearance collection system (10), No. six automatically controlled valve (V6) gas outlet and air pump intercommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220060406.9U CN216769081U (en) | 2022-01-11 | 2022-01-11 | Natural gas on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220060406.9U CN216769081U (en) | 2022-01-11 | 2022-01-11 | Natural gas on-line monitoring device |
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| Publication Number | Publication Date |
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| CN216769081U true CN216769081U (en) | 2022-06-17 |
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| CN202220060406.9U Active CN216769081U (en) | 2022-01-11 | 2022-01-11 | Natural gas on-line monitoring device |
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