the coking properties of coal at elevated pressures. - Argonne ...
the coking properties of coal at elevated pressures. - Argonne ...
the coking properties of coal at elevated pressures. - Argonne ...
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After <strong>the</strong> fiscal year 1982, <strong>the</strong> following expansion or modific<strong>at</strong>ion<br />
will be made.<br />
A. A sorbent regener<strong>at</strong>ion unit: applicable for both limestone and<br />
syn<strong>the</strong>tic sorbent.<br />
B. A new dust - collector for testing is planned for <strong>the</strong> dust discharge<br />
quantity 10 mg/Nm3, and for <strong>the</strong> gas flow r<strong>at</strong>e <strong>of</strong> approxim<strong>at</strong>ely<br />
1,000 Nm3/h.<br />
Design Conditions<br />
(1) Main boiler specific<strong>at</strong>ion<br />
Boiler type: N<strong>at</strong>ural and forced circul<strong>at</strong>ion type drum<br />
boiler; indoor type.<br />
Evapor<strong>at</strong>ion: 20 t/h<br />
Steam pressure: 60 kg/cm2 G <strong>at</strong> <strong>the</strong> outlet <strong>of</strong> <strong>the</strong> superhe<strong>at</strong>er<br />
Steam temper<strong>at</strong>ure: 54OOC <strong>at</strong> <strong>the</strong> outlet <strong>of</strong> <strong>the</strong> superhe<strong>at</strong>er<br />
Feedw<strong>at</strong>er temper<strong>at</strong>ure: 133°C <strong>at</strong> <strong>the</strong> inlet <strong>of</strong> <strong>the</strong> fuel economizer<br />
Boiler efficiency: 87.37% (high calorific value base)<br />
Fuel consumption: 2,450 kg/h (wet <strong>coal</strong> base)<br />
Fuel calorific value: 7,100 kcal/kg (high he<strong>at</strong>ing value for dry<br />
<strong>coal</strong>. )<br />
6,603 kcal/kg (high he<strong>at</strong>ing value for wet<br />
<strong>coal</strong><br />
Combustion flue gas: 20,293 rIm3/h (wet)<br />
(2) Target value <strong>of</strong> emission control<br />
SOX: 95% desulfuriz<strong>at</strong>ion for <strong>coal</strong> containing 3% S<br />
NOx: 60 ppm for <strong>coal</strong> containing 1% N and 02 6% equivalent.<br />
(3) Properties <strong>of</strong> planned <strong>coal</strong>: Refer to Table 2.<br />
(4) Desulfurizing sorbent: n<strong>at</strong>ural limestone an< syn<strong>the</strong>tic sorbent<br />
-~<br />
Plant Outline<br />
(1) Boiler<br />
Fig. 1 shows a section <strong>of</strong> <strong>the</strong> boiler elev<strong>at</strong>ion.<br />
The MBC consists <strong>of</strong> <strong>the</strong> combustion furnace which is composed<br />
<strong>of</strong> a n<strong>at</strong>ural circul<strong>at</strong>ion membrane structure w<strong>at</strong>er wall and <strong>the</strong><br />
refactory wall rear flue. In <strong>the</strong> fluidized bed with a 2.17 m x<br />
4.34 m area, <strong>the</strong> forced circul<strong>at</strong>ion type evapor<strong>at</strong>or by a boiler<br />
circul<strong>at</strong>ing w<strong>at</strong>er pump and <strong>the</strong> primary and secondary superhe<strong>at</strong>ers<br />
are installed. The fluidized bed is divided into two parts so th<strong>at</strong><br />
one side oper<strong>at</strong>ion can be done.<br />
Outside <strong>the</strong> bed, <strong>the</strong> evapor<strong>at</strong>or and flue economizer are<br />
installed. This evapor<strong>at</strong>or, as shown in Fig. 2, can be removed to<br />
<strong>the</strong> free board <strong>of</strong> <strong>the</strong> combustion furnace or rear flue. This,<br />
toge<strong>the</strong>r with a change in <strong>the</strong> install<strong>at</strong>ion level <strong>of</strong> <strong>the</strong> duct<br />
connecting to <strong>the</strong> rear flue, enables <strong>the</strong> test for a change in free<br />
board conditions. In <strong>the</strong> free board <strong>of</strong> <strong>the</strong> combustion furnace,<br />
double stage combustion air feeding ports (8 rows x 5 stages) are<br />
installed to enable various comparison tests to be conducted.<br />
CBC is composed <strong>of</strong> a n<strong>at</strong>ural circul<strong>at</strong>ion w<strong>at</strong>er wall (0.91 m x<br />
0.91 m). In <strong>the</strong> free board <strong>of</strong> <strong>the</strong> CBC, a fuel economizer is<br />
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