Amine liquid foaming device

A foaming device, amine liquid technology, applied in the directions of transportation and packaging, dissolution, chemical instruments and methods, etc., can solve the problems of degradation, corrosion of production equipment and transportation pipelines, amine liquid foaming, etc., and achieve the realization of size and speed. The effect of adjusting, increasing the contact area, and facilitating disassembly and replacement

Inactive Publication Date: 2016-10-12
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous expansion of gas field development scale, H in raw natural gas 2 S, CO 2 The acidic components such as acid components are higher than those at the initial stage of exploration. The high acid gas load will not only severely corrode the production equipment and transmission pipelines, cause a large amount of rust to mix into the system and cause pollution, but also cause the amine liquid to degrade rapidly during the acid gas absorption process, making the solution sharp deterioration in quality
Generally, the amine method is used to desulfurize and decarbonize natural gas. However, in the process of removing acid gas with amine liquid, foaming of amine liquid is common, which greatly reduces the purification effect of amine liquid. How to avoid and eliminate foaming of amine liquid It has become one of the urgent problems to be solved in maintaining efficient and economical operation of natural gas production facilities
At present, the devices that study the factors affecting the foaming of amine liquid work under normal pressure, and the working pressure of the amine liquid on site is 5.0-6.0 MPa, which cannot truly simulate the on-site pressure and then study the factors affecting the foaming of amine liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] From the foaming device 8, add 100 mL of different turbidities from the site and prepare the absorption solution containing 47% (w / w) methyldiethanolamine, set the system temperature to 50 ° C, and set the flow rate to 300 mL / min. The on-site raw natural gas was introduced into the pipeline 9 for 1h, 2h, and 3h, and the control pressure was 5MPa to make rich liquids with different acid gas loads. Based on this, the influence of acid gas loads on the foaming ability of amine liquids was studied. Record 1min, After the foaming height of 5 minutes was stopped, the defoaming time was recorded. The specific experimental results are shown in Table 1.

[0028] Table 1 Analysis results of the influence of acid gas load and turbidity in amine liquid on the foaming ability of amine liquid

[0029]

[0030]

Embodiment 2

[0032] From the foaming device 8, add the rich liquid that participated in the operation in the acid gas absorption system collected at different times on site, set the temperature at 50°C, and at a flow rate of 300mL / min, feed the on-site raw natural gas through the pipeline 9 for 1 hour, and control The pressure is 5MPa, the chemical volumetric method is used to analyze the hydrogen sulfide and carbon dioxide content in the rich liquid, and the acid gas load in the amine liquid in the system operation is calculated. The influence of the acid gas load on the foaming height and defoaming time of the amine liquid in the system operation is shown in the table 2.

[0033] Table 2 Effect of acid gas load on foaming height of amine liquid during system operation

[0034]

[0035]

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Abstract

The invention discloses an amine liquid foaming device, which comprises a cylinder, wherein a foaming cavity is arranged in the cylinder; the upper end of the cylinder is connected with the output end of an amine liquid pipeline, an air discharge pipeline, a first temperature probe and a pressure measuring pipeline; the input end of the amine liquid pipeline is connected with an amine liquid adding container through a nut; the lower end of the cylinder is connected with the output end of an air inlet pipeline, a second temperature probe and a liquid discharging pipeline, wherein the output end of the air inlet pipeline is connected with an air distribution head through a nut. According to the amine liquid foaming device, the real-time detection of pressure and temperature in the cylinder and temperature regulation and control are realized, the regulation of the flow velocity and the flow of air is controlled to realize the regulation of the size and speed of generated foam; the convective mixing of liquid and air in the foaming cavity is realized, and the air is introduced into the foaming cavity through the air distribution head, so that the contact area of the air and the liquid in the foaming cavity can be enlarged. The working pressure of the device is as high as 6.0MPa, the device is simple and reasonable in design, and the field working pressure can be truly simulated so as to research factors which affect amine liquid foaming.

Description

technical field [0001] The invention relates to an amine liquid foaming device, in particular to an amine liquid foaming device for laboratory research on factors affecting amine liquid foaming under high pressure conditions. Background technique [0002] With the continuous expansion of gas field development scale, H in raw natural gas 2 S, CO 2 The acidic components such as acid components are higher than those at the initial stage of exploration. The high acid gas load will not only severely corrode the production equipment and transmission pipelines, cause a large amount of rust to mix into the system and cause pollution, but also cause the amine liquid to degrade rapidly during the acid gas absorption process, making the solution The quality has deteriorated dramatically. Generally, the amine method is used to desulfurize and decarbonize natural gas. However, in the process of removing acid gas with amine liquid, foaming of amine liquid is common, which greatly reduce...

Claims

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Application Information

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IPC IPC(8): B01F3/04
CPCB01F23/235
Inventor 马云王新强吴新民白海涛任鹏谢娟
Owner XI'AN PETROLEUM UNIVERSITY
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