Gas mixing and feeding system used for hydrate preparation experimental device

A technology of gas supply system and experimental device, which is applied in the direction of measuring device, gas fuel, petroleum industry, etc., and can solve the problems of complex synthesis environment, various components of synthesis gas, and long synthesis process, etc.

Inactive Publication Date: 2018-03-02
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is necessary to break through the above-mentioned technical problems such as the lengthy synthesis process of natural gas hydrate, the variety of synthesis gas components, and the complex synthesis environment.

Method used

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  • Gas mixing and feeding system used for hydrate preparation experimental device
  • Gas mixing and feeding system used for hydrate preparation experimental device
  • Gas mixing and feeding system used for hydrate preparation experimental device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: One-component gas supply scheme for hydrate preparation

[0025] When conducting research on the phase equilibrium conditions of single-component gas hydrate synthesis or the synthesis process of single-component gas hydrate, the gas supply scheme of single-component gas can be used. The specific implementation is as follows: when the hydrate preparation experiment starts to supply gas Before, the shut-off valves of the entire gas supply system were all closed. After starting the gas supply experiment, open the cut-off valve V1 or V2 or V3 or V4 or V5 of the corresponding gas cylinder branch according to the predetermined gas selection. Start to deliver gas to the booster pump 6. After the booster pump 6 is full of gas, open the stop valve V6 or V9 or V12 or V15 or V18 at the front end of the branch corresponding to the intermediate storage tank, and start the air compressor 7 and the gas booster pump 6 Start the gas supply, the gas enters the initial stage ...

Embodiment 2

[0026] Example 2: Mixed gas supply scheme for hydrate preparation

[0027] When studying the phase equilibrium conditions of multi-component gas hydrate synthesis or the synthesis process of multi-component gas hydrate, the mixed gas supply scheme of multi-component gas can be adopted. The specific implementation is as follows: When the hydrate preparation experiment starts to supply All shut-off valves of the entire gas supply system are closed before the gas is released. If the two-component gas preparation test is carried out, firstly open the cut-off valve V1 or V2 or V3 or V4 or V5 of the gas cylinder branch corresponding to the first gas, and start to deliver gas to the booster pump 6, after the booster pump 6 is filled with gas , open the cut-off valve V6 or V9 or V12 or V15 or V18 at the front end of the branch of the intermediate storage tank, start the booster pump to start supplying air, when the pressure in the intermediate storage tank 8 or 9 or 10 or 11 or 12 rea...

Embodiment 3

[0037] Example 3: The detection scheme of the proportion of each component after the mixed gas is prepared

[0038] When the mixed gas supply scheme is adopted, in order to further determine the proportion of each component after the mixed gas is prepared, a gas chromatograph can be used to detect the mixed gas. The specific implementation is as follows: , open the pressure reducing valve 18, the pressure stabilizing valve 20, and the steady flow valve 21 of the gas path system of the gas chromatograph, introduce the mixed gas into the sample injection system after drying, stabilizing the pressure, stabilizing the flow, and reducing the pressure of the gas path system, and react The mixed gas in the kettle is sampled in the sampling chamber 23, and the sample is fed to the upper end of the chromatographic column 24 at a uniform speed and quantitatively. Chromatographic column 24 separates the multi-component sample into individual components. When each component of the sample...

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Abstract

The invention belongs to the technical field of exploitation and utilization of hydrates, and relates to a gas mixing and feeding system used for a hydrate preparation experimental device. The systemis composed of: a gas distribution unit, a booster pump, an air compressor, intermediate storage tanks, a flow meter, a pressure regulating valve, a hydrate reaction kettle, a gas chromatograph, a data collecting instrument, an industrial personal computer and supporting pipelines and valves. The system can achieve preparation of single-component gas hydrates and mixed gas hydrates and detection on components in a gas mixture. The gas distribution unit is composed of a plurality of gas tanks in parallel, so that the system can achieve gas supplement of single-component gas and multi-componentgas mixtures in certain ratios. Every gas branch is provided with an intermediate storage tank, so that supplement of various gases can be achieved at stable pressure. The system can monitor gas flowquantity and pressure in the intermediate storage tanks and reaction kettle and can control the pressure in the reaction kettle. Meanwhile, the pressure in the reaction kettle and flow quantity metered by the flow meter can be used for mutual calibration of total amount of substances of the gases in the reaction kettle.

Description

technical field [0001] The invention belongs to the technical field of hydrate exploitation and utilization, and relates to a mixed gas supply system used for a hydrate preparation experimental device. Background technique [0002] Hydrates refer to compounds containing water, involving a wide range, of which natural gas hydrates are the most typical. Natural gas hydrate refers to the crystalline cage formed by the host molecule water and the guest molecule methane, ethane, propane and other hydrocarbon gases, and carbon dioxide, nitrogen and other non-hydrocarbon gas molecules under low temperature and high pressure conditions through the interaction of Van der Waals force. It is a solid complex in which water molecules form a crystalline grid by means of hydrogen bonds, and the holes in the grid are filled with light hydrocarbons, heavy hydrocarbons or non-hydrocarbon molecules. Gas hydrates are distributed in deep-sea sediments or permafrost, and have huge reserves. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10G01N30/88
CPCC10L3/108C10L2290/30C10L2290/60G01N30/88
Inventor 韩怀志王坤芳杨龙滨李彦军宋福元邵亚洲李思广崔运磊胡怡然李帅车春文
Owner HARBIN ENG UNIV
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