Propane continued combustion

An added benefit of pulse combustion is its contribution to environment protection. The rapid combustion, vhich allows extremely short times for the formation of nitrogen oxides, and lower peak temperatures as compared to continuous combustion, result in very low NOx emissions from the pulse combustors (Fig. 2.3). This is especially advantageous when drying foods and biomaterials, provided that the pulse combustor is not fed with sulfur-containing fuels such as propane or natural gas (Kudra, 1998 Kudra, 1999). 

With HVOF, the coating is heated to near or above its melting point and accelerated in a high-velocity combustion gas stream. Continuous combustion of oxygen fuels typically occurs in a combustion chamber, which enables higher gas velocities (550 to 800 m/s). Typical fuels include propane, propylene, or hydrogen. 

Combustion behavior differed in some respects between continuous and instantaneous spills, and also between LNG and refrigerated liquid propane. For continuous spills, a short period of premixed burning occurred immediately after ignition. This was characterized by a weakly luminous flame, and was followed by combustion of the fuel-rich portions of the plume, which burned with a rather low, bright yellow flame. Hame height increased markedly as soon as the fire burned back to the liquid pool at the spill point, and assumed the tilted, cylindrical shape that is characteristic of a pool fire. 

During maintenance work, simultaneous release of chlorine and acetylene from two plants into a common vent line leading to a flare caused an explosion in the line [10]. The violent interaction of liquid chlorine injected into ethane at 80°C/10 bar becomes very violent if ethylene is also present [11]. The relationship between critical pressure and composition for self-ignition of chlorine—propane mixtures at 300°C was studied, and the tendency is minimal for 60 40 mixtures. Combustion is explosive under some conditions [12]. Precautions to prevent explosions during chlorination of solid paraffin hydrocarbons are detailed [13]. In the continuous chlorination of polyisobutene at below 100°C in absence of air, changes in conditions (increase in chlorine flow, decrease in polymer feed) leading to over-chlorination caused an exotherm to 130°C and ignition [14],... 

A traditional propane burner of WS was modified for BCO combustion. The burning chandwr with the modified burner was pre heated up to 900°C with an auxiliary burner placed opposite to the BCO atomiser (Fig. 5). The nozzle was cooled down to 30°C. Once 900°C was reached in the burning chamber, the BCO injection was started. After the ignition of BCO, which occurred immediately with supply of the first amount of BCO, the auxiliary burner was turned off. The supply of BCO was started with about 2 1/h and than increased to about 9-10 1/h (liquid pressure 0.9 bar). The air supply was adjusted to about 3% O2 in the flue gases. The burning of BCO in FLOX mode continued stationary without any difficulties for several hours. Table 1 summarises the main experimental results. 

The stable combustion regimes of propane- and methane-fueled catalytic microreactors were delineated for pressures of 1 and 5 bar under reactor configurations b, ks) and operating conditions relevant to power generation microdevices [3]. Combustion stability diagrams of inlet velocity Uin versus external heat loss coefficient h were computed for propane- and methane-fueled catalytic microreactors via one-parameter continuation of these parameters until they assumed values where combustion was either extinguished or blown out of the numerical domain. 

---