A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

Bian, Jiang; Cao, Xuewen; Yang, Wen; Gao, Song; Xiang, Chengcheng

doi:10.1002/aic.16811

Cited by 15 publications

(3 citation statements)

References 39 publications

(45 reference statements)

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“…Then the liquid droplets are centrifuged onto the walls and removed from the gas mixtures. Compared with traditional processes, it has many advantages, such as being a compact structure, energy-saving, and environmentally protective innocation, of which is, widely used in natural gas dehydration [8,9] and liquefaction today [10,11].…”

Section: Nomenclaturementioning

confidence: 99%

Title Supersonic Condensation and Separation Characteristics of CO2-Rich Natural Gas under Different Pressures

Zheng¹,

Zhao²,

Wang³

et al. 2023

Energy Engineering

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Supersonic separation technology is a new natural gas sweetening method for the treatment of natural gas with high CO 2 (carbon dioxide) content. The structures of the Laval nozzle and the supersonic separator were designed, and the mathematical models of supersonic condensation and swirling separation for CO 2 -CH 4 mixture gas were established. The supersonic condensation characteristics of CO 2 in natural gas and the separation characteristics of condensed droplets under different inlet pressures were studied. The results show that higher inlet pressure results in a larger droplet radius and higher liquid phase mass fraction; additionally, the influence of centrifugal force is more pronounced, and the separation efficiency and removal efficiency of CO 2 are higher. When the inlet pressure is 6 and 9 MPa, the liquefaction efficiency at the Laval nozzle outlet increases from 56.90% to 79.97%, and the outlet droplet radius increases from 0.39 to 0.72 μm, and the removal efficiency is 31.25% and 54.52%, respectively. The effects of inlet pressures on the removal efficiency of the supersonic separator are complicated and are controlled by the combined effects of liquefaction capacity of the nozzle and centrifugal separation capacity of the swirl vane.

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Section: Nomenclaturementioning

confidence: 99%

Title Supersonic Condensation and Separation Characteristics of CO2-Rich Natural Gas under Different Pressures

Zheng¹,

Zhao²,

Wang³

et al. 2023

Energy Engineering

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“…Condensation nucleation model (Bian, et al, 2019) see equation (1), Gyarmathy droplet growth model (Gyarmathy, et al, 1962) see equation ( 2), flow control equations (Sun, et al, 2017) see equation ( 3) -( 14), standard k- turbulence model see equation ( 15) and ( 16), SRK real gas equation (Li, et al, 2002) see equation ( 17):…”

Section: Supersonic Condensation Flow Modelmentioning

confidence: 99%

Study on Supersonic Condensation and Influencing Factors of Natural Gas With Carbon Dioxide

Rong-ge¹,

Jin²,

Feng³

et al. 2021

Frontiers in Heat and Mass Transfer

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With the increasing production and use of natural gas, the supersonic nozzle has become focus of the impurity removal research. In this paper, the modified classical nucleation model is used as the condensation nucleation model, and the Gyarmathy growth model is selected as the droplet growth model. Based on the assumption of no phase slip and Eulerian two fluid model, the flow control equation of wet natural gas is established. By giving the selection criteria as a turbulence equation, the SRK real gas equation is used to carry out the corresponding numerical simulation. The required supersonic nozzle structure and grid number are designed and verified. On basis of the above, the variation of temperature, pressure, nucleation rate, humidity and nucleation rate with the distance X of the nozzle after the methane-carbon dioxide gas enters the nozzle is studied, and the effects of different temperature, pressure and gas component proportion on droplet number, humidity and nucleation rate are explored.

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“…In the other study in this field, Bian et al numerically investigated the condensation characteristics of methane as working fluid in the 3S including SG. They observed that the swirling performance is improved with higher swirling intensity.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Geometry of a Swirl Generator on Energy Loss and Shockwave Position in Arina Nozzle

Majidi

Farhadi

2020

Chem Eng & Technol

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To investigate the effect of the swirl generator (SG) on shockwave position and pressure drop, 3D simulation is conducted and validated by Arina's study. An increase of the blade number, height, and end angle leads to shockwave displacement toward the nozzle outlet. The maximum increment of the shockwave displacement, which is due to enlarging the angle of the blade end, is about 47 %. For this case, the pressure drop share of the SG is nearly half of the total pressure drop, while the residence time of particles is prolonged by about 51 %. As a general finding, increasing the swirl intensity provides a longer residence time to separate adequately the liquid from the gas. However, a higher energy loss is not desirable for the high-pressure process at the downstream of the 3S separator.

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A new liquefaction method for natural gas by utilizing cold energy and separating power of swirl nozzle

Cited by 15 publications

References 39 publications

Title Supersonic Condensation and Separation Characteristics of CO2-Rich Natural Gas under Different Pressures

Title Supersonic Condensation and Separation Characteristics of CO2-Rich Natural Gas under Different Pressures

Study on Supersonic Condensation and Influencing Factors of Natural Gas With Carbon Dioxide

Effect of the Geometry of a Swirl Generator on Energy Loss and Shockwave Position in Arina Nozzle

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