Gas hydrate sampling and analyzing method and device

A gas hydrate, sampling and analysis technology, applied in sampling devices, measuring devices, analysis materials, etc., can solve the problems of component determination, water conversion rate gas-liquid ratio gas storage and other parameters cannot be effectively characterized, sampling is difficult to uniform, The effect of the gas-liquid separator is not ideal, and the effect of accurate and reliable analysis method, true and uniform sampling, and convenient and low-cost sampling equipment is achieved.

Active Publication Date: 2012-07-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is indeed more convenient and accurate in terms of gas phase analysis, but since the hydrate phase is obtained by separating the hydrate slurry phase through gas-liquid separation, the effect of the gas-liquid separator is not ideal, and it is also difficult to operate, and because the aqueous solution and the hydrate phase T

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  • Gas hydrate sampling and analyzing method and device
  • Gas hydrate sampling and analyzing method and device
  • Gas hydrate sampling and analyzing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Sampling and analysis of the solution phase of the hydrate system.

[0041] This sampling test can measure the components, solubility characteristics and solution concentration of the mixed gas in the aqueous solution. The main sampling and analysis steps are as follows:

[0042] 1) First adjust the upper and lower compression pistons (12, 17) of the sampler 11 to the communication position with the sample delivery pipe 19 and the sample collection tank 2 through the screw elevator 16, use the vacuum pump 20 to vacuumize the communication system, and then pass the screw The lifter 16 adjusts the upper and lower compression pistons (12, 17) to communicate with the system in the kettle, and makes the sampling hole 14 on the pipe wall of the sampler 11 be in the solution phase 5 position.

[0043] 2) Turn on the agitator 21 so that the preset molar weight and components are respectively n G and x 0 The mixed gas (A+B) and the volume is V W The water in the h...

Embodiment 2

[0049] Example 2: Gas phase sampling and analysis test of the hydrate system.

[0050] This sampling test can directly measure the gas phase mixture composition at any time during the hydrate reaction process. The main sampling and analysis steps are as follows:

[0051] 1) First adjust the upper and lower compression pistons (12, 17) of the sampler 11 to the communication position with the sample delivery pipe 19 and the sample collection tank 2 through the screw elevator 16, use the vacuum pump 20 to vacuumize the communication system, and then pass the screw The lifter 16 adjusts the upper and lower compression pistons (12, 17) to communicate with the system in the kettle, and makes the sampling hole 14 on the pipe wall of the sampler 11 be in the gas phase 7 position.

[0052] 2) Let the preset molar weight and component be n respectively G and x 0 The mixed gas (A+B) and the volume is V W The water in the hydrate generating tank 4 is fully mixed to generate hydrate, a...

Embodiment 3

[0056] Example 3: Sampling and analysis of the hydrate slurry phase of the hydrate system.

[0057] This sampling test can directly measure the mixed gas composition of the hydrate slurry phase in the hydrate system, the consumption of gas entering the hydrate slurry phase, and the gas storage capacity of the hydrate slurry relative to the gas. The main sampling and analysis steps are as follows:

[0058] 1) First adjust the upper and lower compression pistons (12, 17) of the sampler 11 to the communication position with the sample delivery pipe 19 and the sample collection tank 2 through the screw elevator 16, use the vacuum pump 20 to vacuumize the communication system, and then pass the screw The elevator 16 adjusts the upper and lower compression pistons (12, 17) to communicate with the system in the kettle, and makes the sampling hole 14 on the pipe wall of the sampler 11 be at the hydrate slurry phase 5 position.

[0059] 2) Let the preset molar weight and component be ...

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Abstract

The invention discloses a gas hydrate sampling and analyzing device and a method. The device comprises a hydrate generation kettle, a sampling module, a drive control module, a sample decomposition module, a weighing analysis module and a vacuumizing module, wherein a stirrer is arranged in the hydrate generation kettle; a gas inlet pipe and a liquid inlet pipe are connected to the top part of the hydrate generation kettle; the sampling module is formed by a transparent high pressure resistant resin glass tube, an upper compression piston, a lower compression piston, an upper hydraulic linkage shaft, a lower hydraulic linkage shaft and a sample delivery pipe; the weighing analysis module comprises an electronic analytical balance, a gas chromatograph and relevant connecting pipelines and components; the drive control module comprises a compression piston, a drive linkage shaft, a hydraulic driver, a spiral elevator, a control computer and the like; and the vaccumizing module is formedby a vacuum pump and relevant connecting pipelines and components. Any height space in a reaction kettle can be sampled with any volume, and any phase state of gas phase, solution phase, hydrate slurry phase and hydrate phase in a hydrate reaction system can be sampled and analyzed.

Description

Technical field: [0001] The invention relates to a gas hydrate sampling and analysis method and device, especially for sampling the gas phase, aqueous solution phase, hydrate slurry phase, and hydrate phase in a hydrate system, and analyzing the gas phase, gas phase, and gas phase of a mixed gas in a hydrate system. Aqueous solution phase, hydrate slurry phase, components of hydrate phase, solubility of gas in solution, gas concentration in solution, gas volume entering hydrate slurry and hydrate phase respectively, gas storage of hydrate slurry relative to gas The test and analysis of key parameters such as the gas storage capacity of hydrate relative to gas, the conversion rate of water, and the gas-water ratio of hydrate phase. Background technique: [0002] Gas hydrate, also known as clathrate hydrate, is a small molecular gas (CO 2 、CH 4 etc., known as guest molecules) crystallized from a non-stoichiometric clathrate ice crystal compound. The basic structural feature...

Claims

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Application Information

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IPC IPC(8): G01N1/10G01N1/22G01N5/04G01N30/02
Inventor 夏志明李小森陈朝阳黄宁生吕秋楠蔡晶
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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