Seawater methane sensor calibration device and calibration method based on constant temperature control

A methane sensor and constant temperature control technology, applied in measurement devices, instruments, test water, etc., can solve problems such as affecting the accuracy of results, data drift, etc., and achieve the effect of optimal environmental applicability, reducing measurement deviation, and reducing influence.

Pending Publication Date: 2021-12-10
TONGJI UNIV
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Problems solved by technology

However, during the long-term use or storage of the methane sensor, data drift will occur, which will affect the accuracy of the results. Therefore, regular calibration and calibration of the methane sensor is required

Method used

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  • Seawater methane sensor calibration device and calibration method based on constant temperature control
  • Seawater methane sensor calibration device and calibration method based on constant temperature control
  • Seawater methane sensor calibration device and calibration method based on constant temperature control

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0037] A seawater methane sensor calibration device based on constant temperature control, such as figure 1 shown, including:

[0038] Gas supply equipment 1 provides mixed gas of different concentrations of methane and air;

[0039] A circulation pump 11, a calibration tank 2 and a temperature control device 3 for controlling the temperature in the calibration tank 2;

[0040] Gas chromatograph 4 and pre-sampling module;

[0041] The calibration tank 2 is provided with a bubble plate 5, a mixing mechanism, and a methane sensor 7 to be calibrated. The calibration tank 2 is provided...

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Abstract

The invention relates to a seawater methane sensor calibration device and calibration method based on constant temperature control. The calibration device comprises gas supply equipment, a calibration tank and a temperature control device, a gas chromatograph and a front sampling module; wherein a bubble disc and a methane sensor to be calibrated are arranged in the calibration tank, a headspace gas sampling pipe and a liquid phase sampling pipe are arranged on the calibration tank, the bubble disc is located at the bottom of the calibration tank, the input end of the headspace gas sampling pipe is communicated into the calibration tank, the output end of the headspace gas sampling pipe is connected to a gas phase sampler, the input end of the liquid phase sampling pipe is communicated to the position, close to the bottom, in the calibration tank, and the output end is connected to a liquid phase sampler, the output end of the liquid phase sampler is connected to the gas chromatograph through a first dryer, and the gas phase sampler is connected to the gas chromatograph through a second dryer. Compared with the prior art, the calibration device is beneficial to reducing the influence of environmental interference on calibration, realizes online calibration of the underwater in-situ methane sensor, and effectively reduces the measurement deviation of the methane sensor.

Description

technical field [0001] The invention relates to the field of calibration of seawater methane sensors, in particular to a calibration device and calibration method for seawater methane sensors based on constant temperature control. Background technique [0002] Methane (CH 4 ) is an important greenhouse gas, and its contribution to global warming in the past 100 years has exceeded that of carbon dioxide (CO 2 ) 28 times. The ocean is one of the natural sources of atmospheric methane, emitting 5-25 Tg CH to the atmosphere every year 4 , accounting for 1-13% of all natural emissions. In addition, methane is not only an important tracer gas for exploring submarine hydrothermal systems and cold seep systems, but also one of the important constituent gases of emerging clean energy gas hydrates. Therefore, the concentration of dissolved methane in seawater is an accurate quantification of oceanic contribution to atmospheric CH 4 Indispensable basic data for research on the car...

Claims

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Application Information

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IPC IPC(8): G01N33/18G01N30/86
CPCG01N33/18G01N30/8665G01N2030/025
Inventor 田力杨群慧季福武伍汉青马骏王虎
Owner TONGJI UNIV
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