scholarly journals Development of a 2T/D pressurized two-stage entrained flow coal gasifier. 1st, Report, Characteristics of coal gasification.

1991 ◽  
Vol 57 (535) ◽  
pp. 790-795 ◽  
Author(s):  
Jun INUMARU ◽  
Saburo HARA ◽  
Masami ASHIZAWA ◽  
Yuichi KOBAYASHI ◽  
Teruhide HAMAMATSU ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Two Stage ◽  
Entrained Flow ◽  
Coal Gasifier

scholarly journals Investigation of the Coal Gasification Process Under Various Operating Conditions Inside a Two-Stage Entrained Flow Gasifier

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Armin Silaen ◽  
Ting Wang
Keyword(s):  
Coal Gasification ◽  
Operating Conditions ◽  
Coal Slurry ◽  
Two Stage ◽  
Heating Value ◽  
Fuel Distribution ◽  
Entrained Flow ◽  
One Stage ◽  
Gasification Process ◽  
Entrained Flow Gasifier

Numerical simulations of the coal gasification process inside a generic 2-stage entrained-flow gasifier fed with Indonesian coal at approximately 2000 metric ton/day are carried out. The 3D Navier–Stokes equations and eight species transport equations are solved with three heterogeneous global reactions, three homogeneous reactions, and two-step thermal cracking equation of volatiles. The chemical percolation devolatilization (CPD) model is used for the devolatilization process. This study is conducted to investigate the effects of different operation parameters on the gasification process including coal mixture (dry versus slurry), oxidant (oxygen-blown versus air-blown), and different coal distribution between two stages. In the two-stage coal-slurry feed operation, the dominant reactions are intense char combustion in the first stage and enhanced gasification reactions in the second stage. The gas temperature in the first stage for the dry-fed case is about 800 K higher than the slurry-fed case. This calls for attention of additional refractory maintenance in the dry-fed case. One-stage operation yields higher H2, CO and CH4 combined than if a two-stage operation is used, but with a lower syngas heating value. The higher heating value (HHV) of syngas for the one-stage operation is 7.68 MJ/kg, compared with 8.24 MJ/kg for two-stage operation with 75%–25% fuel distribution and 9.03 MJ/kg for two-stage operation with 50%–50% fuel distribution. Carbon conversion efficiency of the air-blown case is 77.3%, which is much lower than that of the oxygen-blown case (99.4%). The syngas heating value for the air-blown case is 4.40 MJ/kg, which is almost half of the heating value of the oxygen-blown case (8.24 MJ/kg).

Investigation of chemical composition and morphology of ash deposition in syngas cooler of an industrialized two-stage entrained-flow coal gasifier

Energy ◽  
2020 ◽  
Vol 194 ◽  
pp. 116901 ◽  
Author(s):  
Guangyu Li ◽  
Shisen Xu ◽  
Xuebin Zhao ◽  
Ruijin Sun ◽  
Chang’an Wang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Ash Deposition ◽  
Two Stage ◽  
Entrained Flow ◽  
Coal Gasifier

scholarly journals Experimental Study on Coal Gasification in a Full-Scale Two-Stage Entrained-Flow Gasifier

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4937
Author(s):  
Guangyu Li ◽  
Luping Wang ◽  
Chaowei Wang ◽  
Chang’an Wang ◽  
Ping Wu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coal Gasification ◽  
Full Scale ◽  
Input Rate ◽  
Two Stage ◽  
Entrained Flow ◽  
Operation Period ◽  
Entrained Flow Gasifier ◽  
Coal Resource ◽  
First Time

In this paper, coal gasification characteristics in the reductor were investigated in a full-scale two-stage pressurized entrained-flow gasifier, which has been seldom conducted previously. The present study aimed at elucidating the effects of gasifying agent concentration, coal input rate, and operation period under full reductor load on the performance of a utility two-stage pressurized entrained-flow gasifier for the first time. When the steam input in the combustor was raised from 3318 kg/h to 5722 kg/h, the total outputs of H2, CO, and CO2 were increased by 1765 Nm3/h and 2063 Nm3/h, respectively, while the CH4 output was decreased by 49 Nm3/h. The coal conversion rate was minimal at low steam input. In addition, more coal gasified in the reductor could increase the output of CH4, while CH4 could reach 1.24% with the coal input in the range of 8000–10,000 kg/h. The present work can offer a further understanding of the gasification performance in the reductor of the full-scale two-stage pressurized entrained-flow gasifier, and motivates the potential for clean utilization of coal resource.

On the scaling-up of a two-stage air blown entrained flow coal gasifier

1999 ◽  
Vol 77 (4) ◽  
pp. 745-750 ◽  
Author(s):  
Caixia Chen ◽  
Takahiro Miyoshi ◽  
Hidehiro Kamiya ◽  
Masayuki Horio ◽  
Toshinori Kojima
Keyword(s):  
Scaling Up ◽  
Two Stage ◽  
Entrained Flow ◽  
Coal Gasifier

scholarly journals Investigation of two-stage air-blown and air-steam-blown entrained-flow coal gasification

2017 ◽  
Vol 899 (9) ◽  
pp. 092001 ◽  
Author(s):  
N A Abaimov ◽  
E B Butakov ◽  
A P Burdukov ◽  
A F Ryzhkov
Keyword(s):  
Coal Gasification ◽  
Two Stage ◽  
Entrained Flow

A Study on Gasification Reactivity of Pressurized Two-stage Entrained Flow Coal Gasifier

2000 ◽  
Vol 2000.4 (0) ◽  
pp. 367-368
Author(s):  
Saburo HARA ◽  
Jun INUMARU ◽  
Masami ASHIZAWA ◽  
Kazuyoshi ICHIKAWA
Keyword(s):  
Two Stage ◽  
Entrained Flow ◽  
Gasification Reactivity ◽  
Coal Gasifier
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