Design And Numerical Simulation Of The New CWS Burner For Gasification

CWS gasification technology is one of the pivotal technologies of Clean Coal Use.CWS is a kind of clean fuel which has crude advantage as material of gasification.But ,there are also so many problems in the CWS gasification technique in China,especially the key technique-the nozzle of CWS gasification is still a involved in CWS gasification. the characteristic and life-span of the fuel burner plays an important role in the operation.For the disadvantage of the current nozzles,we design a new nozzle for CWS gasification ,which would be much of practical value.First, this paper introduces the status quo of gasification technology for CWS, describes the characteristics as well as structures of some gasification atomizers home and abroad. The requirements of CWS gasification for the fuel burner are given,and a new idea used in nozzle design is also given in this part.Secondly,the test system and the relevant instruments and apparatuses are presented.This paper has a research on the flux and atomization characteristics of the premixed nozzle which is often used in industry,and a research is also given on the flux and atomization characteristics of the 3-channel Non-premixed nozzle,then the paper has a observation to the fluid film atomization which is at a low velocity and flux.And based on these experiments,a new gasification nozzle structure is put forward.Then,a initiative calculation is given in this paper,and a cold condition modeling is given so that the experiment would be put up with the current instruments,so a model nozzle is designed in this paper ,a experiment to improve the structure is also put up.Finally,Two models is established to give a numerical-simulation to calculate the velocity,the pressure,the atomization of the nozzle outlet,and the result expresses that the two models can simulate the jet successfully.