Minimum gas high precision collection device and its usage method

A collection device and trace gas technology, applied in the field of test analysis, can solve the problems of high maintenance cost, complicated equipment, long time, etc., and achieve the effects of easy processing, improved analysis accuracy and high strength

Inactive Publication Date: 2007-10-24
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The above-mentioned device and process have the following disadvantages: (1) about 15 kilograms of mercury is needed in the device, and once it leaks, it will cause great harm to the human body and the environment
(2) It takes a long time (about 1 hour) to completely transfer the gas from the glass tube to the gas chamber, and the work efficiency is low
(3) The amount of gas

Method used

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  • Minimum gas high precision collection device and its usage method
  • Minimum gas high precision collection device and its usage method
  • Minimum gas high precision collection device and its usage method

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Embodiment Construction

[0020] Referring to shown in Fig. 1, the high-precision collecting device of trace gas of the present invention comprises a tube body 1, the inside of the tube body 1 is a gas chamber 1a, a needle valve 2 is provided on the tube body 1, and at the left end of the tube body 1 A sealing pressure cap 3 is provided, and a gas delivery pipe 4 is provided in the gas chamber 1a of the pipe body 1 to communicate with the vertically arranged cylinder 5. The piston 5a of the cylinder 5 is located below and is connected to the reciprocating drive mechanism 14. The reciprocating drive mechanism 14 can adopt existing There are motor / eccentric wheel mechanisms, gear / rack transmission mechanisms, etc. in the art; mercury liquid 6 is filled in the cylinder 5, and a separation pipe 7 with a tapered lower part is connected to the upper part of the cylinder 5, and the separation pipe 7 is provided with a seal Steel ball 8, the top of separation pipe 7 is connected with sample bottle 10 with valve...

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Abstract

The invention discloses a high-accuracy collector of micro gas and a relative method, belonging to oil gas earth chemical analysis technical field. The device comprises a tube and a needle valve, wherein a gas room of the tube has a gas tube communicated with a cylinder, a below piston of the cylinder is connected with a reciprocal drive device, the cylinder comprises pump liquid while upper part is connected with a separate tube in which a seal steel ball is arranged which top is connected with a gas bottle with a valve, the gas room comprises a vacuum gage, the gas room and the separate tube are arranged with air exhaust tube, the gas tube and the air exhaust tube are arranged with electromagnetic valves. And the method comprises that (1), adding a sample tube, (2), vacuuming and breaking the sample tube, (3), dispersing gas into the cylinder, (4), the piston moves up to press gas into the gas bottle, (5), the piston moves down to disperse gas in the gas room and the cylinder until balance, (6), repeating the steps (4, 5) to transfer gas all into the gas bottle. The invention is used for geological sample analysis in oil gas earth chemical research.

Description

technical field [0001] The invention relates to a test analysis technology, in particular to a high-precision collection device for trace gas in oil and gas geochemical research, and also relates to a method for using the device. Background technique [0002] In oil and gas geochemical research, it is necessary to encapsulate geological samples in gold sample tubes, heat them under a certain temperature and pressure, and then analyze the quantity and composition of natural gas produced by the samples. After the heating experiment, the gas in the gold tube needs to be collected and transferred to the sample bottle for various analysis. At present, the foreign method is to place the gold sample tube in a vacuumed glass tube, turn the needle valve knob to make the needle point on the top of the knob pierce the gold tube, gas and some light hydrocarbons (C 6 -C 12 ) is released, wherein the light hydrocarbons are frozen and precipitated in the cold trap, the gas (C 1 -C 5 , ...

Claims

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Application Information

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IPC IPC(8): G01N1/10
Inventor 刘金钟
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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