Quantitative sampling system for liquid nitrogen frozen hydrate sample decomposition gas
A technology of liquid nitrogen freezing and decomposing gas, which is applied to measuring devices, analytical materials, material inspection products, etc., can solve problems such as deviations in measurement results, and achieve the effects of saving time, ensuring accuracy, and improving work efficiency
Active Publication Date: 2018-07-24
GUANGZHOU MARINE GEOLOGICAL SURVEY
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Problems solved by technology
However, when the natural gas hydrate frozen in liquid nitrogen is taken out, a certain amount of liquid nitrogen will be attached, and the liquid nitrogen will volatilize and release a large amount of nitrogen gas, which will be mixed into the gas released by the decomposition of natural gas hydrate, which will cause the measurement results to appear deviation
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[0022] Such as figure 1 As shown, this embodiment discloses a liquid nitrogen frozen hydrate sample decomposition gas quantitative sampling system, including a sample decomposition chamber 1 for storing natural gas hydrate samples and a carbon dioxide absorption chamber for storing solutions that absorb and dissolve carbon dioxide gas pool2.
[0023] Such as figure 1 As shown, the sample decomposition chamber 1 is also provided with an air inlet passage 15 and an air outlet passage, wherein the air inlet passage 15 is located at the bottom of the sample decomposition chamber 1, and the air inlet passage 15 is provided with a control for controlling the opening and closing of the air inlet passage. valve 17. The gas outlet channel is arranged on the sealing cover 11, and the gas inlet channel 15 is externally connected with carbon dioxide gas. The temperature of the carbon dioxide gas introduced from the inlet channel 6 is relatively high, which can promote the rapid tempera...
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The invention discloses a quantitative sampling system for liquid nitrogen frozen hydrate sample decomposition gas. The quantitative sampling system at least comprises a sample decomposition cabin forstoring natural gas hydrate samples and a carbon dioxide absorption tank for storing a solution for absorbing and dissolving carbon dioxide gas, wherein a carbon dioxide gas inlet channel, a gas outlet channel, a methane detector for detecting the content of methane in the sample decomposition cabin as well as a pressure measuring device and a temperature measuring device for detecting a pressureand a temperature in the sample decomposition cabin are also arranged in the sample decomposition cabin; the carbon dioxide gas inlet channel is externally connected with the carbon dioxide gas; thesample decomposition cabin is communicated with the carbon dioxide absorption tank by a second channel communicated to the gas outlet channel; a third channel is further arranged in an upper end partof the carbon dioxide absorption tank; the third channel is communicated with a gas carrying and intaking channel and a gas quantification ring. The quantitative sampling system provided by the invention has advantages of being simple in structure, convenient to operate, and stable and reliable in detection results.
Description
technical field [0001] The invention relates to a gas quantitative sampling system, in particular to a liquid nitrogen frozen hydrate sample decomposition gas quantitative sampling system. Background technique [0002] Gas hydrate, also known as "combustible ice", is widely distributed in deep sea sediments or permafrost in land areas. Natural gas and water can form ice-like crystalline substances under high pressure and low temperature conditions, because its appearance is like ice and meets Fire can burn, so it is also called "combustible ice". Its resource density is high, the global distribution is wide, and it has extremely high resource value, so it has become a long-term research hotspot in the oil and gas industry. [0003] With the continuous development of my country's economic strength and science and technology, marine gas hydrate investigation is being vigorously developed. In May 2017, the first trial mining of natural gas hydrate in China's sea area was succ...
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IPC IPC(8): G01N33/22
CPCG01N33/222
Inventor 程思海刘梓锐傅晓洲庞云天杨天邦
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY