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FURNACES, FUEL-FIRED

White phosphorus may be made by several methods. By one process, tri-calcium phosphate, the essential ingredient of phosphate rock, is heated in the presence of carbon and silica in an electric furnace or fuel-fired furnace. Elementary phosphorus is liberated as vapor and may be collected under phosphoric acid, an important compound in making super-phosphate fertilizers. [Pg.37]

Fuel economy Fuel-fired furnaces Fuel gas Fuel oil... [Pg.425]

Furnaces, fuel-fired Furnaces, induction Furniture... [Pg.428]

Fuel-fired furnaces primarily utilize carbonaceous or hydrocarbon fuels. Since the purpose of a furnace is to generate heat for some useful appHcation, flame temperature and heat transfer are important aspects of furnace design. Heat transfer is impacted by the flame emissivity. A high emissivity means strong radiation to the walls. [Pg.141]

The analytical mechanisms for predicting the corresponding pollutant formation associated with fossil-fuel-fired furnaces lag the thermal performance prediction capabiUty by a fair margin. The most firmly estabUshed mechanism at this time is the prediction of thermal NO formation (24). The chemical kinetics of pollutant formation is, in fact, a subject of research. [Pg.147]

Combustion/ Solid fuel-fired furnaces Fuel in direct contact Recuperative Manual and Batch, periodic Natural/self, Crucible, shaft Melting roasting Shaft, muffle... [Pg.85]

Gaseous fuel-fired furnaces Multi fuel-fired furnaces heated by-products of combustion. Material is heated by heat transfer draught furnaces ... [Pg.85]

Electric furnaces, 12 286-318 76 144, 145. See also Electric arc furnace (EAF) Fuel-fired furnaces applications for, 12 315-316 arc furnaces, 12 297-306 classification of, 12 286 economic aspects of, 12 313-314 health and safety factors related to, 12 314 induction furnaces, 12 307-313 in phosphorus manufacture, 19 8-11 resistance furnaces, 12 287-297 for secondary slags, 14 759-760 Electric furnace steelmaking processes,... [Pg.302]

Fuel crossover, 72 214 Fuel economy, 72 388-389, 414 diesel engine, 72 420 Fuel efficiency, in furnaces, 72 332-333 Fuel-fired furnaces, 72 318-336 analysis of, 72 332-333 classification of, 72 320-321 development of, 72 319-320 industrial furnaces, 72 327-330 power-plant furnaces, 72 323-327 Fuel gas... [Pg.384]

Figure 2. Simplified flowsheet of 500-lb/hr pulverized-fuel-fired furnace... Figure 2. Simplified flowsheet of 500-lb/hr pulverized-fuel-fired furnace...
Flame emissivity -in fuel-fired furnaces [FURNACES, FUEL-FIRED] (Vol 12)... [Pg.404]

Many tubular reactors are operated adiabatically because of the problems in providing heat transfer. Figure 1.11a shows a complete gas-phase reaction process with a high-temperature tubular reactor that is cooled by generating steam. Figure 1.11 b shows a fuel-fired furnace being used as a tubular reactor. [Pg.29]

Fig. 5.1. Spent sulfuric acid regeneration flowsheet. H2S04(f) in the contaminated spent acid is decomposed to S02(g), 02(g) and H20(g) in a mildly oxidizing, 1300 K fuel fired furnace. The furnace offgas (6-14 volume% S02, 2 volume% 02, remainder N2, H20, C02) is cooled, cleaned and dried. It is then sent to catalytic S02 + Vi02 —> S03 oxidation and H2S04 making, Eqn. (1.2). Air is added just before dehydration (top right) to provide 02 for catalytic S02 oxidation. Molten sulfur is often burnt as fuel in the decomposition furnace. It provides heat for H2S04 decomposition and S02 for additional H2S04 production. Tables 5.2 and 5.3 give details of industrial operations. Fig. 5.1. Spent sulfuric acid regeneration flowsheet. H2S04(f) in the contaminated spent acid is decomposed to S02(g), 02(g) and H20(g) in a mildly oxidizing, 1300 K fuel fired furnace. The furnace offgas (6-14 volume% S02, 2 volume% 02, remainder N2, H20, C02) is cooled, cleaned and dried. It is then sent to catalytic S02 + Vi02 —> S03 oxidation and H2S04 making, Eqn. (1.2). Air is added just before dehydration (top right) to provide 02 for catalytic S02 oxidation. Molten sulfur is often burnt as fuel in the decomposition furnace. It provides heat for H2S04 decomposition and S02 for additional H2S04 production. Tables 5.2 and 5.3 give details of industrial operations.
Armed with the thermodynamic fundamentals of heat management, we now take a closer look at the unit operation control loops for heat exchangers. We start with utility exchangers. These are used when heat is supplied to, or removed from, the process. Examples are steam-heated reboilers, electric heaters, fuel-fired furnaces, water-cooled condensers, and refrigerated coolers. [Pg.149]

Input/Output Performance Parameters for Furnace Operation The term firing density is typically used to define the basic operational input parameter for fuel-fired furnaces. In practice, firing density is often defined as the input fuel feed rate per unit area (or volume) of furnace heat-transfer surface. Thus defined, the firing density is a dimensional quantity. Since the feed enthalpy rate Hf is... [Pg.39]

See other pages where FURNACES, FUEL-FIRED is mentioned: [Pg.404]    [Pg.119]    [Pg.119]    [Pg.129]    [Pg.168]    [Pg.85]    [Pg.383]    [Pg.387]    [Pg.119]    [Pg.119]    [Pg.119]    [Pg.129]    [Pg.425]    [Pg.877]    [Pg.1164]    [Pg.39]    [Pg.688]    [Pg.725]    [Pg.160]    [Pg.223]    [Pg.540]    [Pg.546]    [Pg.698]    [Pg.735]    [Pg.676]    [Pg.668]    [Pg.418]   
See also in sourсe #XX -- [ Pg.16 , Pg.57 , Pg.58 , Pg.59 , Pg.72 , Pg.176 , Pg.436 ]



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