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Swing reaction device for evaluating performance of hydrate inhibitors

A hydrate inhibitor and reaction device technology, which is applied to measuring devices, material analysis through optical means, instruments, etc., can solve the problems of high gas consumption, inability to be widely used, and difficulty in determining the time of hydrate blockage, etc., to avoid effect of error

Active Publication Date: 2015-07-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-pressure reaction kettle with stirring replaces the fluid flow in the actual pipeline with the liquid disturbance caused by stirring, and judges the formation of hydrates through temperature and pressure signals. Using this device cannot understand the flow of slurry in the kettle after hydrates are generated, and it is difficult to determine hydrates Clogging time, so it cannot be used to evaluate the anti-aggregation performance of the anti-aggregation agent
The large-scale circulation device driven by a pump to circulate fluid is mainly used to evaluate the safety of fluid flow. In the evaluation of inhibitors, due to the long test cycle, complex operation, large volume of injected liquid, high gas consumption, large investment, and inability to quickly and efficiently screen hydration Cannot be widely used due to shortcomings such as drug inhibitors

Method used

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  • Swing reaction device for evaluating performance of hydrate inhibitors
  • Swing reaction device for evaluating performance of hydrate inhibitors
  • Swing reaction device for evaluating performance of hydrate inhibitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1 to Figure 3 As shown, a swing reaction device for evaluating the performance of hydrate inhibitors includes a constant temperature box 1, an air intake system 2, a liquid intake system 3, six high-pressure reactors 4 installed in the constant temperature box 1, a swing system 5, and It includes a data acquisition system 6 and a high-definition camera for photographing the hydrate formation in the high-pressure reactor 4. The six high-pressure reactors 4 are respectively connected to the intake system 2 and the liquid intake system 3. The data acquisition system 6 is used to obtain high-pressure The temperature, pressure, and displacement signals of the reactor 4 and the video data in the high-pressure reactor 4, the swing system 5 fixes the high-pressure reactor 4 and makes it swing periodically.

[0032] Such as figure 2 As shown, the autoclave 4 includes a transparent tube 41, a fixed end still cover 42 and a swing end still cover 43 respectively a...

Embodiment 2

[0042] The concrete operation steps of above-mentioned embodiment are as follows:

[0043] (1) For each autoclave 4, close the autoclave inlet valve 25 and liquid inlet valve 31, open the three-way valve 33 and valve 34, turn on the vacuum pump 35 to vacuumize for about 1 minute, and close the valve 34 after vacuuming;

[0044] (2) Group and label each autoclave 4 into 2 groups, the first row is the first group, labeled 1-1, 1-2, 1-3, and the second row is the second group, labeled 2 -1, 2-2, 2-3, respectively place the prepared 17ml solution containing 1wt% PVP K90 in the liquid inlet 32 ​​of 1-1, 1-2, 1-3, open the liquid inlet valve 31, containing The solution of 1wt%PVP K90 is sucked into the transparent tube 41, and the liquid inlet valve 31 is closed; the prepared 17ml solution containing 1wt%HY10 is put into the liquid inlets 32 of 2-1, 2-2, and 2-3, and the inlet valves are opened. Liquid valve 31, the solution containing 1wt% HY10 is sucked into the transparent tube ...

Embodiment 3

[0057] The difference between this example and Example 2 is to compare the inhibitory effects of anti-aggregation agents KL-1 and Span85, and use Span85 as a reference to determine whether KL-1 is an anti-aggregation agent with good anti-aggregation performance. Under the experimental condition identical with embodiment 2, suck 17ml to contain 1.5wt% KL-1 and 17ml to contain 1.5wt%Span85 solution in each still of two groups of autoclave respectively, after charging the mixed gas of 8.7MPa, wait After the temperature and pressure signals are stable, set the temperature of the temperature-controlled freezer to 2.0°C. Judging from the temperature and pressure signals and high-definition camera, the induction time of adding 1.5wt% KL-1 solution is 108min, the blocking time is 313min, and the stopping time is 437min; the induction time of adding 1.5wt% Span85 is 105min, and the blocking time is 254min, and the stopping time was 357min, the induction time of the two is not much diff...

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Abstract

The invention discloses a swing reaction device for evaluating performance of hydrate inhibitors. The device comprises a thermostat, an air inlet system, a liquid inlet system, high-pressure reactors arranged in the thermostat, a swing system and a data acquisition system, wherein the high-pressure reactors are connected with the air inlet system and the liquid inlet system respectively, the data acquisition system is used for acquiring temperatures, pressure and displacement signals of the high-pressure reactors as well as video data in the high-pressure reactors, and the swing system fixes the high-pressure reactors and enables the high-pressure reactors to swing periodically. Compared with traditional devices which simulate gas-liquid disturbance of pipelines through stirring, the device has the advantages that the device performs simulation through swing and better conforms to field pipeline delivery conditions, understanding of the hydrate gathering process and determination of blockage time are realized more really, multiple evaluation methods are combined, low-dose hydrate inhibitors can be screened out efficiently, performance of thermodynamic inhibitors, low-dose hydrate inhibitors and combined inhibitors can be evaluated, and the device for evaluating the performance of the hydrate inhibitors is excellent.

Description

technical field [0001] The invention relates to the field of performance evaluation of hydrate inhibitors, in particular to a rocking reaction device for evaluating the performance of hydrate inhibitors. Background technique [0002] Under the conditions of high pressure and low temperature, water molecules form polyhedral cage-shaped cavities through hydrogen bonding. These cavities can surround and wrap guest molecules in polyhedrons to form hydrates similar to ice-like crystals. Common gases that form hydrates include: Methane, ethane, propane, nitrogen, carbon dioxide and hydrogen sulfide, etc. In the process of oil and natural gas extraction, processing and transportation, hydrates are easily produced, affecting oil and gas transportation. In severe cases, hydrates will block pipelines, causing great economic losses and potential safety hazards. [0003] Injecting chemical inhibitors is currently the most economical, most convenient, and commonly used method for inhibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 樊栓狮李保耀郎雪梅王燕鸿许书瑞吕平平
Owner SOUTH CHINA UNIV OF TECH
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