Research On The Uniform And Settlement Of Water Mist In The Gas Pipeline

Gas is an associated gas in the coal mining process, the effective use of which notonly could reduce the damage to the atmosphere, but also bring huge economic benefits.In recent years, with the continued investment of the research, the technology oftransportation system of gas water mist begins to be applied to production.But thecomplex transport of the gas-water mist two-phase, the basic research of which requirefurther study. In this paper, the installation of nozzle angle in the pipeline, layout andthe best transportation diameter were investigated.Gas-water mist transport conditionswere optimized, ultimately uniform length and settlement of water mist under differentconditions were determined, which provide a certain amount of theoretical and technicalsupport for the widely use of the technology of transportation system of gas water mist.In this paper the uniform and settlement of water mist in the pipeline wereresearched through the comprehensive method of theoretical analysis, numericalsimulation and experimental study. Firstly, use the superposition principle of potentialflowt to establish the theoretical models of gas flow and water mist flow.Thoughanalysising the force of water mist particles the trajectory equation of mist particle wasoptimized;Secondly, research the installation of nozzle angle in the pipeline, layout andthe best transportation diameter by using numerical simulation, ultimately uniformlength and settlement of water mist under the optimum working conditions wasfixed;Finally by means of test to verify whether water mist uniform the pipe in theuniform length and the settlement law of water mist.From numerical simulation and experimental studies we can found: The uniformsituation of water mist is the best under the conditions of pipeline diameter is300mm,the nozzle angle is0°in the pipeline; Under these conditions, the uniform of water mistincreases with the increase of gas flow velocity;When the gas flow velocity is1m/s,2m/s,3m/s,4m/s,5m/s,6m/s, the uniform length of water mist is1.780m,2.161m,2.627m,2.712m,2.754m,3.136m,the experiment shows that the water mist uniform thepipe in the uniform length; The sedimentation rate of water mist which behind thenozzle0.25m was significantly greater than other location, when the gas flow velocity isgreater than1m/s the sedimentation rate of water mist decreased with the increase oftransport distance; At established test position, with the increase of the gas velocity thesedimentation rate of water mist decreases firstly and then increases. The results provides a theoretical basis for the design and engineering applicati-ons of the transport of gas and water mist.The theoretical research and experimental results of nozzle installation,installation distance and settlement law in thegas and water mist piple,which provide a certain reference value for the engine-ering design.