Development Of The Heat-driven Circulation Reactor And Simulation Of The Flow Field

Dimethyl-cyclosiloxane cracking from dimethyldichlorosilane hydrolyzate is an important intermediate in organic silicon industry which can synthesize various silicone products,whose quality and yield process a great impact on the overall economic benefits.The cracking reactor is a key equipment of the organic silicon production,whose structure is particularly important.This research work mainly arounds the cracking reactor:Focusing on two major problems of low heat transfer efficiency and the inadequate reaction caused by poor mixing at present,a new cracking reactor design idea for a strong endothermic process as the cracking and rearrangement reaction had been presented based on the analysis of the existing structure of the heat transfer system.A new type of heat-driven circulation-type reactor for cracking rearrangement was developed according to a new design concept of a liquid cycle.According to the cracking reactor inner heating parts for the prototype,we simplified the model reasonably on the researched question and established the three-dimensional physical model and mathematic model considering the heat,momentum and mass transfer between vapour and liquid.We choose the thermal phase change model to simulate the phase transformation of vapor-liquid boiling and analyze the transformation rules of vapor volume fraction,heat transfer coefficient,turbulent kinetic energy and fluid velocity which closed to the theoretical analysis.Further,different simulations were conducted under different heat-flow density and mass flow rate.The research results could provide some theoretical support for the optimization design and safe operation of the cracking reactor.