Research Of The Effect Of Torch Flame Thermal Radiation Ranges Of Long Distance Gas Pipeline

The engineering calculation method for the elevated flare radiation range is mainly usedAmerican Petroleum Association of API formulas are simple and single point source521norms recommended. This formula is simple, widely used, but there are some deficiencies,the formula design did not take into account the influence of the height of the flame, thewidth of the size of the flame thermal radiation. In addition, the oil company Sheelrecommended a flat cone flame mode and API521introduces a banana shaped flame mode,the two kinds of solid flame mode can calculate the flame liftoff height, in the calculation offlame thermal radiation ranges of length, width and other geometrical features, compared tothe point source formula is more in line with the morphological characteristics of real theflame, higher precision, but also more complex.(1) Based on the truncated cone solid flame mode design of the Sheel oil company, usingthe related theories of the jet flame temperature region, combined with the StephenBoltzmann blackbody radiation law of the original flat cone solid flame mode optimization,design a subregional flat cone solid flame mode. Compared with the original flat cone solidflame mode, related research area flat cone solid flame mode using flame sub regional theory,the Sheel flat cone mode according to the height of the flame and the temperature is dividedinto three areas, using the four party prescribed radiation ability of Stephen-Pohl Seidmanlaw and the absolute temperature of blackbody is this law, according to the geometricalcharacteristics of the flame, the radiation heat by using the method of integral of the productof four times the volume of flame and the temperature of the different regions of the flame tocalculate the total amount of flame thermal radiation in the proportion of. The modeimproved the defects affect the original flat cone solid flame mode cannot be calculateddistribution of flame temperature on flame thermal radiation range, more in line with thecombustion characteristics of the elevated jet flame, higher precision.(2) The elevated jet flame radiation field simulation using CFD software, the standard k-ε turbulence mode, eddy dissipation mode, P-1radiation mode of the jet flame was simulatedwith Fluent software, the temperature field distribution of the flame, the distributioncharacteristics of thermal radiation field. (3) Calculated and the numerical simulation of engineering data from South SecondPajiang River Fire Engineering elevated flare of the west east gas transmission. Comparisonof calculation results of single point source, point source, flat cone, subregional flat conemode and CFD simulation results. Verify the partition flat cone mode is reasonable andaccurate in the calculation of overhead vent flame thermal radiation torch. And how topartition domain blunt cone mode is applied to engineering practice, play the practicability ofthe mode suggested.