Furnace change

Temperature of the process stream leaving the furnace changes the setpoint of a flow controller on fuel. 

The process can be applied to existing furnaces without modification to the furnace or if so only minor changes. However further studies may reveal that there are more optimal configurations that would require furnace changes that could only be applied at a repair or to a new furnace. 

For the sidewall-fired furnace changing the firing profile may be necessary. A comparison between the measured and calculated flue gas temperatures when closing burners from die top in the same runs is seen in Figure 3.15 [120]. 

The structure of oxygen side blow furnace changes mainly according to the property of the raw... 

Traditional Vanyukov furnace is designed to have a flat crucible bottom, while that of oxygen side blow furnace changes to a ladder-like model, which reduced the heat loss and is beneficial for steady production. 

We can sample the energy density of radiation p(v, T) within a chamber at a fixed temperature T (essentially an oven or furnace) by opening a tiny transparent window in the chamber wall so as to let a little radiation out. The amount of radiation sampled must be very small so as not to disturb the equilibrium condition inside the chamber. When this is done at many different frequencies v, the blackbody spectrum is obtained. When the temperature is changed, the area under the spechal curve is greater or smaller and the curve is displaced on the frequency axis but its shape remains essentially the same. The chamber is called a blackbody because, from the point of view of an observer within the chamber, radiation lost through the aperture to the universe is perfectly absorbed the probability of a photon finding its way from the universe back through the aperture into the chamber is zero. 

Gran plot a linearized form of a titration curve, (p. 293) graphite furnace an electrothermal atomizer that relies on resistive heating to atomize samples, (p. 414) gravimetry any method in which the signal is a mass or change in mass. (p. 233)... 

In fire-tube furnaces developed in the nineteenth century, such as typified by the Scotch-Marine boiler (Fig. 1), thin currents of water contact a multiplicity of tubes thus, the hot gases transmit heat simultaneously to aH regions of the bulk of the water. Therefore, this boHet—furnace combination steams readily and responds promptly to load changes, and is, for a given amount of heating surface, the least expensive of aH furnace—boHet instaHations... 

B. Langfoid, I. H. Stice, L. Latimei, and R. E. Walsh, Ttetermination of Hydrogen by Impulse Furnace Fusion Employing Chromatographic Detection, Teledyne Wab Chang Corp., Albany, Oieg., 1974. 

The pipe stiU furnace heats the feed to a predeterrnined temperature, usuaUy a temperature at which a predeterrnined portion of the feed changes into vapor. The vapor is held under pressure in the pipe in the furnace until it discharges as a foaming stream into the fractional distUlation tower. Here the nonvolatile or Hquid portion of the feed descends to the bottom of the tower to be pumped away as a bottom nonvolatile product, while the vapors pass up the tower to be fractionated into gas oU, kerosene, and naphtha. 

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