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Flow measuring device for multiphase flow of natural gas hydrate and measuring method of flow measuring device

A technology of flow measurement device and measurement method, which is applied in the field of natural gas, can solve problems such as low accuracy and complicated measurement devices, and achieve the effect of accelerating the process of industrialization

Inactive Publication Date: 2016-08-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on gas hydrate is still in the experimental stage, but there are few flow measurement methods and devices for gas hydrate multiphase media, and there are problems of complex measurement devices and low accuracy.

Method used

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  • Flow measuring device for multiphase flow of natural gas hydrate and measuring method of flow measuring device
  • Flow measuring device for multiphase flow of natural gas hydrate and measuring method of flow measuring device
  • Flow measuring device for multiphase flow of natural gas hydrate and measuring method of flow measuring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the gas hydrate multiphase flow measurement device includes a differential pressure transmitter, a first pressure introduction pipe 4 and a second pressure introduction pipe 3, the first pressure introduction pipe 4 and the second pressure introduction pipe 3 are perpendicular to each other, And fixed at the bend pipe 2; one end of the differential pressure transmitter is connected with the first pressure introduction pipe 4, and the other end is connected with the second pressure introduction pipe 3.

[0020] Measurement method of gas hydrate multiphase flow flow measurement device:

[0021] Take a point on the steady flow cross section of the straight pipe 1, and record it as point A, and fix the first pressure induction pipe 4 and the second pressure induction pipe 3 perpendicular to each other at point A: the first pressure induction pipe 4 is perpendicular to the straight pipe 1 The incoming fluid flow direction, the second pressure intr...

Embodiment 2

[0043] Based on the liquid circulation circuit in the experimental system of marine natural gas hydrate solid fluidization exploitation, the relevant parameters are as follows:

[0044] Working medium: water;

[0045] Pipeline working pressure: 10MPa;

[0046] pipeline:

[0047] Pressure pipe size:

[0048] Pressure pipe material: 06Cr9Ni10;

[0049] Differential pressure transmitter: Honeywell ST3000

[0050] Differential pressure transmitter range: 0 ~ 100kPa;

[0051] After the flow measurement device is installed at the elbow (2) of the straight pipe (1) in the liquid circulation circuit, the measurement process is as follows:

[0052] (1) Before the loop system is turned on, first clear the differential pressure transmitters at PDT201 and PDT202;

[0053] (2) After the loop system is turned on, when the liquid in the water cycle reaches a stable delivery, read the data and record it as ΔP 1 , ΔP 2 ;;

[0054] (3) Calculate the flow rate;

[0055] ...

Embodiment 3

[0058] This example is based on the three-phase mixed medium circulation circuit in the experimental system of marine natural gas hydrate solid fluidization exploitation, and its relevant parameters are as follows:

[0059] Working medium: natural gas hydrate

[0060] Pipeline working pressure: 10MPa;

[0061] Pipe: DN80;

[0062] Pressure pipe size:

[0063] Pressure pipe material: 06Cr9Ni10;

[0064] Differential pressure transmitter: Honeywell ST3000

[0065] Differential pressure transmitter range: 0 ~ 100kPa;

[0066] After the flow measurement device is installed at the elbow (2) of the straight pipe (1) in the three-phase mixed medium circulation circuit, the measurement process is as follows:

[0067](1) Before the loop system is turned on, first clear the differential pressure transmitters at PDT501, PDT601, PDT602, and PDT603;

[0068] (2) After the loop system is opened, when the natural gas hydrate reaches a stable delivery, read the data respectively, and ...

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Abstract

The invention relates to a measuring device and a measuring method thereof in the field of natural gas, particularly to a flow measuring device for multiphase flow of a natural gas hydrate. The flow measuring device comprises a differential pressure transmitter, a first pressure drawing pipe and a second pressure drawing pipe, wherein the first pressure drawing pipe and the second pressure drawing pipe are perpendicular to each other and fixed at an elbow; one end of the differential pressure transmitter is connected with the first pressure drawing pipe, and the other end of the differential pressure transmitter is connected with the second pressure drawing pipe; the first pressure drawing pipe is perpendicular to an incoming direction of a fluid in a straight pipe, and the second pressure drawing pipe is parallel to the incoming direction of the fluid in the straight pipe; the volume flow of pipe delivered media is calculated according to a formula shown in the specification. The measuring device and the measuring method thereof are used for determining flow of gas-phase media, liquid-phase media and three-phase mixed media in a solid-state fluidization mining experiment system for a marine natural gas hydrate and provides the basis for research of flow and heat transfer characteristics of the natural gas hydrate and storage and transportation of the marine natural gas hydrate.

Description

technical field [0001] The invention relates to a measuring device and a measuring method in the field of natural gas, in particular to a measuring device and a measuring method for the multiphase flow of natural gas hydrate. Background technique [0002] Natural gas hydrate is composed of small molecular hydrocarbons (mainly CH 4 ) and water molecules rely on van der Waals force to form a cage crystal substance under low temperature and high pressure conditions. Theoretically, 1m 3 The natural gas hydrate can release 164m 3 Standard state CH 4 and 0.8m 3 of water. The amount of methane stored in the global gas hydrate is about 1.8-2.1x10 16 m 3 , which is equivalent to more than twice the carbon equivalent of coal, oil, natural gas and other fuels that have been found in the world. As an efficient and green new energy source, natural gas hydrate is known as the most promising strategic resource in the "post-petroleum era", and has attracted great attention at home a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F7/00
CPCG01F7/00
Inventor 刘艳军唐孝蓉袁娇何霞黄志强赵金洲周守为李清平付强
Owner SOUTHWEST PETROLEUM UNIV
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