Ikelic - Alliance Digital Repository

COAL
coal/flux feeding system uses nitrogen to pres
surize the coal in lockhoppers. The lockhoppers
discharge the coal to pressurized injection hop
pers, from which it is discharged by metering
screws into the coal injection lines. Coal, oxygen
or air, and steam enter the gasifier through tan
gential injection burners located in a common
horizontal plane. The gasifier operates at pres
sure up to 30 bar and temperature up to 1 ,650C.
Alaskan Usibelli coat is the first choice for the
3-ton per day gasifier design.
####
HYCOL PILOT PLANT COMPLETES
OPERATIONS
HYCOL, an advanced coal gasification pilot plant
located in Sodegaura, Chiba, Japan, successfully
completed its 3-year operation program on
SOURCE: MATSU0KA ET AL.
FIGURE 1
April 15, 1994. This unit, sponsored by New
Energy and Industrial Technology Development
Organization (NEDO), as a part of the
governmental new energy program called the
Sunshine Project, operated by Research Associa
tion for Hydrogen-from-Coal Process Develop
ment (HYCOL), was based on an entrained-flow,
oxygen-blown, single gasification chamber with
two-step, spiral-flow, multi-burners (Figure 1).
The HYCOL pilot plant was designed to gasify
50 tons per day of coal. During the program,
four different coals were gasified. The plant
logged 2,164 hours of operation, including a
1,149-hour long, uninterrupted run on Taiheiyo
coal.
The program has been summarized recently in
papers presented at the 11th Annual Pittsburgh
Coal Conference in September and the 13th
EPRI Conference on Gasification Power Plants in
October.
CONCEPTUAL FLOW IN THE HYCOL GASIFICATION ZONE
Product Gas
1
^y 7
Dry
Slag* Hot Gas
Ash Coated
Zone
Wet Ash Coated
Zone
...J
Circulation
4-35
Coal-
1.200 1.600
Temperature('C)
Reactive Char
Reactive Char
+ C02+H20
Coal+02
-CO+ Hj
-C02+H20
THE SYNTHETIC FUELS REPORT, JANUARY 1995