Preparation method of methane combustible ice in laboratory sand filling pipe and application thereof

A technology of sand filling tubes and methane, which is applied in the preparation of test samples, fuel oil testing, material inspection products, etc. It can solve the problems of harsh combustible ice, filling and discharging of combustible ice methane gas, and difficult storage and measurement, so as to reduce the cost of experiments , the effect of improving the experimental efficiency

Active Publication Date: 2019-11-26
CHENGDU NENGSHENGCAI SCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, existing laboratory methods for generating combustible ice require extremely harsh conditions of high pressure and low temperature
Moreover, although in-situ neutron diffraction can be used to synthesize stable combustible ice crystal samples, the filling, storage, and metering of combustible ice methane gas are difficult problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 of the present invention provides a method for generating methane combustible ice in sand-filled pipes, which specifically includes the following steps:

[0034] (1) weigh each raw material as above-mentioned methane dissolving agent, mix and obtain methane dissolving agent;

[0035] (2) Dissolving methane in a methane dissolving agent to obtain a saturated methane solution; the temperature of the dissolution process is 15-25°C and the pressure is 1.0×10 5 Pa; The volume ratio of methane and methane dissolver is;

[0036] (3) Mix the methane solution with the sand evenly to soak the sand, add it to the sand filling pipe for compaction, wrap the cotton or cloth soaked in water outside the sand filling pipe, and place it in a refrigerator or freezer to freeze, that is, Methane combustible ice can be obtained for sand-filled pipes. The volume ratio of methane solution to sand grains is 1:5; the thickness of the cotton or cloth is 5cm, the freezing temperatur...

Embodiment 2

[0039] Embodiment 2 of the present invention discloses a method for applying methane combustible ice in sand-filled pipes as described above, which specifically includes the following steps:

[0040] (1) Calculating the total volume Q1 of dissolved methane in the sand filling pipe

[0041] (11) Measuring the solubility of methane

[0042] The methane gas is dissolved in a volume V by the drainage method 水 In the methane dissolving agent, until saturated, record the total volume of dissolved methane gas as V 甲烷 ; by V 水 and V 甲烷 Solubility R is calculated according to formula B; said formula B is R=V 甲烷 / V 水 ;

[0043] (12) Calculate the total volume Q1 of dissolved methane in the sand filling pipe

[0044] Volume Q of methane solution metered into the sand packing pipe 湿 , according to the formula C to calculate the total amount of dissolved methane gas Q1 in the sand filling pipe, the formula C is: Q1=V 湿 ×R.

[0045] (2) Use the injection liquid to displace the met...

Embodiment 3

[0048] Embodiment 3 of the present invention discloses a method for generating methane combustible ice in a laboratory sand-filled pipe and a gas displacement method.

[0049] A method for generating combustible ice from methane in a sand-filled pipe, specifically comprising the following steps:

[0050] (1) Take raw materials according to the following mass percentages: 10% polypropylene glycol and 90% water, mix uniformly to obtain methane dissolving agent;

[0051] (2) Dissolving methane in a methane dissolving agent to obtain a saturated methane solution; the temperature of the dissolution process is 20°C and the pressure is 1.0×10 5 Pa; The solubility of methane in 10% polypropylene glycol is 24.8%;

[0052] (3) Mix the methane solution with the sand evenly to soak the sand, add it to the sand filling pipe for compaction, wrap the cotton or cloth soaked in water outside the sand filling pipe, and place it in a refrigerator or freezer to freeze, that is, Methane combusti...

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Abstract

The invention discloses a preparation method of methane combustible ice in a laboratory sand filling pipe. The preparation method comprises the following steps: dissolving methane in a methane dissolving agent to obtain a saturated methane solution; and uniformly mixing the methane solution with sand grains, adding the mixture into a sand filling pipe for compaction; wrapping the sand filling pipewith cotton or cloth wetted by water; and freezing the sand filling pipe in a refrigerator or a freezer for 2 to3 days to obtain methane combustible ice in the sand filling pipe. According to the invention, the simple and rapid method and experimental device are provided for selecting an optimal combustible ice rapid supercooling nanometer liquefying agent, selecting an optimal injection mode andselecting an optimal injection speed; and the technical and theoretical basis is provided for selecting a optimal method for exploiting combustible ice methane gas.

Description

technical field [0001] The invention relates to the technical field of laboratory research on combustible ice, in particular to a preparation method of methane combustible ice in a laboratory sand filling tube and its application. Background technique [0002] At present, the world's conventional oil and natural gas resources are hugely consumed and are facing depletion, and there is an urgent need to develop new energy sources. Gas hydrate (Natural Gas Hydrate, referred to as Gas Hydrate) is combustible ice, which is distributed in deep sea sediments or permafrost in land areas, and is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. The distribution range is very wide. The evaluation results of scientists show that the distribution area of ​​combustible ice in the seabed area alone reaches 40 million square kilometers, accounting for 1 / 4 of the total area of ​​the earth's oceans. And under standard cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N33/22
CPCG01N1/286G01N33/225G01N2001/2866
Inventor 冯文光冯妍冯卓冯博陈万钢
Owner CHENGDU NENGSHENGCAI SCI & TECH DEV CO LTD
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