Numerical Simulation of Coal Oil Water Slurry Gasification Process in New-Type Coal Water Slurry Gasifier

2012 ◽  
Vol 229-231 ◽  
pp. 2501-2505 ◽  
Author(s):  
Hai Long Yu ◽  
Feng Kun Wang ◽  
Gui Fang Zhang ◽  
Jian Zhong Liu
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Water Slurry ◽  
Gasification Process ◽  
Coal Water Slurry ◽  
New Type ◽  
The Common ◽  
Oil Water ◽  
Dissolution Ratio ◽  
Effective Component

The gasification process of coal oil water (COW) slurry in new-type coal water slurry(CWS) gasification furnace was studied with numerical simulation method. The temperature and concentration fields were obtained for the gasification furnace. The simulated results showed that the gasification effect of the new-type coal water slurry gasification is better than the common coal water slurry gasification. In the new-type gasification furnace, the average temperature is slightly increased and the carbon translative ratio is increased by 1.81%. The effective component (CO+H2) in coal gas at the outlet of the furnace is increased by 10.58%, and the concentration of CO2and H2O is greatly decreased. The H2O dissolution ratio is greatly increased and the gasification effect is obviously better that that of the common coal water slurry.

Investigation of Effects of Baffle Configuration on the Performance of a Fixed-Cone Valve by Gas-Liquid Two-Phase Model

2012 ◽  
Vol 166-169 ◽  
pp. 1824-1829
Author(s):  
W.L. Wei ◽  
B. Lv ◽  
Y.L. Liu ◽  
X.F. Yang
Keyword(s):  
Numerical Simulation ◽  
Energy Dissipation ◽  
Turbulent Flow ◽  
Average Velocity ◽  
Simulation Method ◽  
Velocity Fields ◽  
Two Phase ◽  
Pressure Fields ◽  
New Type ◽  
Conventional Type

Nested type Fixed-Cone Valve, numerical simulation, energy dissipating, turbulent flow Abstract: In this paper, In this paper, a new type of Fixed-Cone Valve was proposed by improving the conventional type Fixed-Cone Valve .The flow fields of the two kinds of Fixed-Cone Valves were studied by using numerical simulation method .The computed pressure fields and the velocity fields were analyzed ,which shows that under the same conditions ,and by using the nested Fixed-Cone valve, the pressure of the upstream pipe and the cone valve and the average velocity along the downstream pipeline are reduced ,but the rate of energy dissipation is increased.

Synthesis and Evaluation of Sulfonated Humic Acid-Acrylic Acid Graft Copolymer Applied as Dispersant in Coal-Water Slurry

2012 ◽  
Vol 581-582 ◽  
pp. 334-337
Author(s):  
Jun Guo Li ◽  
Guang Hua Zhang ◽  
Long Liu ◽  
Fang Zhao
Keyword(s):  
Humic Acid ◽  
Acrylic Acid ◽  
Graft Copolymer ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
New Type ◽  
Rate Behavior ◽  
Formulation Stability ◽  
Low Dosage ◽  
Highly Loaded

A new type of graft copolymer, sulfonated humic acid-acrylic acid resin (SHA), was synthesized and developed as dispersant for highly-loaded coal water slurry (CWS) from Chinese Binchang coal. In this study, The formulation, stability and rheology of the slurry with SHA were investigated. The experimental results show that SHA can reduce effectively CWS viscosity at low dosage, and that the CWS with SHA has excellent stability within 48 h and exhibits shear-thinning apparent viscosity/shear rate behavior. Based on the above, SHA is a promising dispersant for highly-loaded CWS in the practical use in industry.

Research on the Shape of Oxidation Ditch Diversion Wall

2012 ◽  
Vol 178-181 ◽  
pp. 419-423
Author(s):  
Y. L. Liu ◽  
B. Lv ◽  
W.L. Wei
Keyword(s):  
Numerical Simulation ◽  
Velocity Field ◽  
Simulation Method ◽  
Flow Patterns ◽  
Oxidation Ditch ◽  
Bend Flow ◽  
The Common ◽  
Equal Thickness ◽  
Common Shape ◽  
Velocity Region

Diversion wall can improve bend flow patterns in an oxidation ditch. In this paper, a non-equal thickness diversion wall was proposed, and studied by numerical simulation method. The simulated velocity field of the new shape of oxidation ditch diversion wall was compared with that of the common shape diversion wall under the same boundary conditions, which shows that the new shape can better improve the bend flow patterns in an oxidation ditch, and reduce the size of the backflow area and increase the high-velocity region in the channel.

A pre-heating vaporization technology of coal-water-slurry for the gasification process

2007 ◽  
Vol 88 (4) ◽  
pp. 325-331 ◽  
Author(s):  
Kosuke Aiuchi ◽  
Ryo Moriyama ◽  
Shohei Takeda ◽  
Shunji Kitada ◽  
Masaki Onozaki ◽  
...  
Keyword(s):  
Water Slurry ◽  
Gasification Process ◽  
Coal Water Slurry
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