Optimization Simulation Of Thermal And Flow Field In The Course Of Acetylene Production From Coal

Acetylene, a kind of basic chemical material can produce many downriver chemical products and it has the beautiful name of "mother of organic chemical", although "ethylene route" has replaced many other productive ways, and it plays a very important role in making stuff of many fields.In our country, methods of acetylene production mostly depend on conventional carbide technology, petroleum production technology develops slowly because of the reality of lean oil. Western developed countries have replaced all high energy consumption, high pollution and long flow carbide technology of. It is necessary to look for a suitable technical way that is fit for the situation of our country.An arc plasma is a kind of classical and hot plasma, so it is considered to be a perfect way to make acetylene.Technology of acetylene production from coal in plasma pyrolysis has some characteristics: short flow, little pollution. This technology has huge potential advantage comparing to other technology in economic and social benefit.But current technology has some disadvantages, coking seriously, great heat consumption, short working time, low efficiency, small load. In order to reduce or suppress these deficiencies.We should do further improvement, at the same time,evaluate conclusion under different parameter and different construction, but we should also simulate thermal and flow field in reactor if we want to know distributed condition of the inner reactor, after this ,we can guide experiment using the data. Along with rapidly development and wildly application of computer, many kinds of stimulant ways are becoming mature and mature. In the course of coal pyrolysis, we adopt FLUENT to simulate thermal and flow field in reactor, then improve the current device, consequently, reacting time can become long, coking can be reduced, efficiency can increase, load can enlarge. Through simulation we can get the following conclusion, first: coking slightly and the outlet temperature of reactor is about 4250K when plasma temperature is 5000K; second: reacting space is the biggest when velocity of gas is 70m/s; third: simulative picture of two-dimension is more clear than two-dimension's, and it is easy to explain certain condition by using three-dimension simulation; fourth: choosing three coal powder jets and three plasma jets can increase load of reactor, and the reacting is severe and sufficient; fifth: 100mm is the best dimension for reactor.