Study on Relationship between Structural Parameter and Performance of Gas-Solid Separator

2011 ◽  
Vol 415-417 ◽  
pp. 1516-1520
Author(s):  
Xue Ping Wang ◽  
Zhen Wei Zhang
Keyword(s):  
Numerical Simulation ◽  
Gas Flow ◽  
Separation Efficiency ◽  
Structural Parameters ◽  
Structural Parameter ◽  
Exhaust Pipe ◽  
Cyclone Separator ◽  
Structure Parameter ◽  
Gas Field ◽  
And Performance

This paper mainly focuses on the numerical simulation of the gas flow field of cyclone separator. The authors took advanced of RSM turbulence model of software Fluent to simulate the gas field. The regulations among structure parameter of exhaust pipe, pressure lose and separation efficiency can be obtained according to the numerical simulation results under the situation of changing the structural parameters. The conclusion of this paper can put forward the theoretical reference for the structure optimization of cyclone separation.

scholarly journals Investigation on influences of loose gas on gas-solid flows in a circulating fluidized bed (CFB) reactor using full-loop numerical simulation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pengju Huo ◽  
Xiaohong Li ◽  
Yang Liu ◽  
Haiying Qi
Keyword(s):  
Numerical Simulation ◽  
Flow Rate ◽  
Gas Flow ◽  
Circulating Fluidized Bed ◽  
Separation Efficiency ◽  
Circulation Rate ◽  
Solid Mass ◽  
Gas Flow Rate ◽  
Gas Leakage ◽  
Mass Circulation

AbstractThe influences of loose gas on gas-solid flows in a large-scale circulating fluidized bed (CFB) gasification reactor were investigated using full-loop numerical simulation. The two-fluid model was coupled with the QC-energy minimization in multi-scale theory (EMMS) gas-solid drag model to simulate the fluidization in the CFB reactor. Effects of the loose gas flow rate, Q, on the solid mass circulation rate and the cyclone separation efficiency were analyzed. The study found different effects depending on Q: First, the particles in the loop seal and the standpipe tended to become more densely packed with decreasing loose gas flow rate, leading to the reduction in the overall circulation rate. The minimum Q that can affect the solid mass circulation rate is about 2.5% of the fluidized gas flow rate. Second, the sealing gas capability of the particles is enhanced as the loose gas flow rate decreases, which reduces the gas leakage into the cyclones and improves their separation efficiency. The best loose gas flow rates are equal to 2.5% of the fluidized gas flow rate at the various supply positions. In addition, the cyclone separation efficiency is correlated with the gas leakage to predict the separation efficiency during industrial operation.

scholarly journals Influence of Vortex Finder Structure on Separation Performance of Double-Overflow Three-Product Hydrocyclones

Separations ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 79
Author(s):  
Yuekan Zhang ◽  
Jiangbo Ge ◽  
Lanyue Jiang ◽  
Hui Wang ◽  
Junru Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Experimental Research ◽  
Separation Efficiency ◽  
Structural Parameters ◽  
Separation Performance ◽  
Insertion Depth ◽  
Flow Field Characteristics ◽  
Vortex Finder ◽  
Fine Classification

In view of the difficulty of traditional hydrocyclones to meet the requirements of fine classification, a double-overflow three-product (internal overflow, external overflow and underflow) hydrocyclone was designed in this study. Numerical simulation and experimental research methods were used to investigate the effects of double-overflow flow field characteristics and structural parameters (i.e., internal vortex finder diameter and insertion depth) on separation performance. The research results showed that the larger the diameter of the internal vortex finder, the greater the overflow yield and the larger the cut size. The finest internal overflow product can be obtained when the internal vortex finder is 30 mm longer than the external vortex finder. The separation efficiency is highest when the internal vortex finder is 30 mm shorter than the external vortex finder.

The Structure Design and Numerical Simulation Research on Downhole Hydrocyclone Desander

2014 ◽  
Vol 933 ◽  
pp. 434-438
Author(s):  
Yue Juan Yan ◽  
Yan Xu Shang ◽  
Zun Ce Wang ◽  
Mi Tian ◽  
Yue Wang
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Separation Efficiency ◽  
Structural Parameters ◽  
Production Capacity ◽  
Geometrical Model ◽  
Structure Design ◽  
Operating Conditions ◽  
Structure Parameters ◽  
Effect Of Structure

A new downhole hydrocyclone desander with spiral deflector and cyclone cone was designed to apply in downhole solid-liquid separation according to the downhole operating conditions, such as a high produced liquid viscosity, narrow radial working space and closed bottom flow, etc. The structure parameters were designed primarily based on the effect of structure size on pressure drop, production capacity and separation efficiency. Numerical simulation was conducted on the base of Mixture model and Reynolds stress (RSM) turbulent model by Fluent CFD software. The geometrical model of single inlet and single outlet was established. The simulation calculations were carried out to analysis the effect of structure parameters change on separation efficiency and pressure drop, obtained the influence rules. The optimum structural parameters were confirmed. The numerical simulation results lay the foundation for the next experimental study.

Study of Operating Parameters’ Impact on Separation Performance of Cyclone Separator

2011 ◽  
Vol 422 ◽  
pp. 794-798
Author(s):  
Xue Ping Wang ◽  
Ying Zhang ◽  
Ju Guang Xue ◽  
Zhen Wei Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flow Velocity ◽  
Turbulence Model ◽  
Separation Efficiency ◽  
Operating Parameters ◽  
Separation Performance ◽  
Cyclone Separator ◽  
High Concentration ◽  
Secondary Particles

The numerical simulation can be obtained by taking advantage of turbulence model of Fluent to study the gas-solid flow field of cyclone separator. The pressure of the cyclone drops increases with the enhancement of the inlet flow velocity, and the increase amplitude can become larger and larger. The separation efficiency of the cyclone enhances gradually as the increase of the flow. The increase amplitude of small and secondary particles is much lager compared with the increase amplitude of big ones. The overall separation efficiency can strengthen gradually with increasing of particles concentration as well as the each part’s efficiency. But the separation efficiency will stay in stable level when the concentration reaches a certain value with the big particles in the low concentration and small ones in a relatively high concentration.

scholarly journals Analysis and Optimization of a Cyclone Integrated with a Cartridge Filter in a Hazardous Materials Collection Truck

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Shuwen Zhou ◽  
Yu Wang
Keyword(s):  
Mathematical Model ◽  
Separation Efficiency ◽  
Structural Parameters ◽  
Influence Factors ◽  
Hazardous Materials ◽  
Solid Particles ◽  
Separation Performance ◽  
Exhaust Pipe ◽  
Insertion Depth ◽  
Filter Cartridge

In order to meet the filtration separation of hazardous materials on hazardous materials collection truck, the most popular separation devices, such as the cyclone separator and the filter cartridge, are combined to form a new filtration device in this study. The advantages of the two devices are utilized to achieve effective separation of solid particles and prevent secondary pollution. Among the various structural influence factors of filtration equipment, four structural parameters that affect the separation performance significantly are selected as optimization variables. The response surface methodology was used to design the simulation experiment. Using fluid mechanics analysis software, multiple sets of parameters were simulated. Then, the simulation data was used to establish a mathematical model of separation efficiency, and structural optimization analysis was performed based on the mathematical model. Finally, the results show that the inner exhaust pipe diameter and the cone height have more influence on the efficiency of the cyclone separation structure. The interaction between the diameter and insertion depth of the inner exhaust pipe is also obvious. Among the four optimization variables, there is an optimum value for the inner exhaust pipe insertion depth, and the effect of the other three factors on the separation efficiency is monotonic. In the case of a total separation efficiency of 99.9% and after optimizing the combined model within a reasonable interval, 81.25% of the 1-μm particles can be removed by the cyclone separation part, and only 18.75% are removed by the filter cartridge.

Structural Parameter Optimization for Large Spacing Sublevel Caving in Chengchao Iron Mine

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1619
Author(s):  
Yuye Tan ◽  
Mochuan Guo ◽  
Yimin Hao ◽  
Chi Zhang ◽  
Weidong Song
Keyword(s):  
Numerical Simulation ◽  
Parameter Optimization ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Structural Parameter ◽  
Effective Measure ◽  
Physical Similarity ◽  
Physical Experiments ◽  
Sublevel Caving ◽  
Iron Mine

Non-pillar sublevel caving is beginning to use large structural parameters in China. Appropriate structural parameters can effectively control the loss and dilution of stope and improve ore drawing efficiency. In this study, taking Chengchao Iron Mine as the engineering background, a theoretical calculation, a numerical simulation, and physical similarity experiments were combined to optimize sublevel height, production drift spacing, and drawing space. The optimal structural parameter range, based on the ellipsoid ore drawing theory, was obtained as a theoretical reference for subsequent studies. A “two-step” strategy was used, in which PFC2D software (Itasca Consulting Group, Minneapolis, MN, USA) was used to numerically simulate 20 groups of different sublevel heights and production drift spacing parameters were used to determine the appropriate sublevel height and production drift spacing for the project. Subsequently, the optimization of the ore drawing space was studied using PFC3D (Itasca Consulting Group, Minneapolis, MN, USA) particle unit software, numerical simulation analysis, and similar physical experiments. The results showed that safe and efficient mining can be achieved when the structural parameters of the stope are 17.5 m sublevel height, 20 m production drift spacing, and 6 m drawing space. The findings of this study can further the goal of green and efficient mining, and provide a theoretical reference for the popularization and application of pillarless sublevel caving with large structural parameters at home and abroad. It is an effective measure for the green mining of caving mines.

The Comparison with Numerical Simulation Results of Steam-Water Flow Field and Experimental Data for Car Exhaust Pipe

2011 ◽  
Vol 187 ◽  
pp. 570-574
Author(s):  
Qing Guo Liu ◽  
Yan Ma ◽  
Chun Mei Yang
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Flow Field ◽  
Separation Efficiency ◽  
Tangential Velocity ◽  
Exhaust Pipe ◽  
Two Phase ◽  
Car Exhaust ◽  
Simulation Results ◽  
The Relationship

In this paper, the physical model for flow field of exhaust pipe has been established on the condition of a liquid-gas exhaust pipe from cars using ethanol gasoline. The numerical simulation results for internal flow field of car exhaust pipe are compared with the experimental data. It is showed that the outside free vortex tangential velocity and axial velocity of single-phase flow field have been simulated better. It is indicated in the simulation of separation process of steam-water two-phase: The relative error, comparing the relationship between flow and separation efficiency with measured of that is less than 7%, and the same to 15%, comparing the relationship between flow and separation ratio with measured of that. Thereby, it is confirmed correctly for the mathematical model founded for numerical calculation and the algorithm selected.

Numerical Simulation of Gas Flow Field in Gas-Liquid Hydrocyclone Separator

2011 ◽  
Vol 109 ◽  
pp. 509-516
Author(s):  
Xiang Hong Jin ◽  
Feng Shuang Han ◽  
Jin Liang Zhang ◽  
Hui Huang ◽  
Xin Wen Liu
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
Separation Efficiency ◽  
Short Circuit ◽  
Tangential Velocity ◽  
Flow Distribution ◽  
Mouth Area ◽  
Exhaust Pipe ◽  
Outlet Angle ◽  
Gas Flow Field

The gas flow field in hydrocyclone separator was numerically simulated by applying RSM turbulence model, and the gas flow velocity distribution and stress distribution were calculated. According to the characteristics of gas flow distribution within the separator, it is found that: (1) the rotating strength of gas flow is related to the outlet angle of guide blade, the greater the outlet angle, the smaller the tangential velocity; (2) the obvious short circuit flow distribution under the exhaust pipe mouth area is easy to carry droplets and roll them out, causing a decrease in separation efficiency; (3) the high strength of turbulence pulse at mouth area of vent and drainage is easy to break the droplets and decrease their diameter, which affects the separation efficiency. The above research results lay the foundation for the structure optimization and the improvement of separation properties of axial guide vane cyclone gas-liquid separator.

The Numerical Simulation Research of Spiral Solid-Liquid Separators

2012 ◽  
Vol 229-231 ◽  
pp. 1729-1732
Author(s):  
Yue Juan Yan ◽  
Zun Ce Wang ◽  
Sen Li ◽  
Xu Yan
Keyword(s):  
Numerical Simulation ◽  
Separation Efficiency ◽  
Structural Parameters ◽  
Water Injection ◽  
Operating Parameters ◽  
Simulation Research ◽  
Inlet Velocity ◽  
Efficiency Increase ◽  
Suitable Structure ◽  
Solid Liquid

In water production-reinjection system, a spiral solid-liquid separator is installed at the inlet of the electric submersible pump (ESP) to prevent solid materials in the re-injected water from plugging formation pore and keep the efficiency of water injection. In order to determine optimum structural parameters and operating parameters of the separator, numerical simulation was conducted to analysis the effect of spiral laps, spiral pitch, inlet velocity, etc. on separation properties. By analysis and comparison, spiral laps of 5, pitch of 18 mm are the most suitable structure parameters. In operating parameters, the pressure drop and separation efficiency increase with the inlet velocity increasing. The results provide reference for further research of the spiral solid-liquid separators.

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