PRACTICABILITY OF FLAME ARRESTER FOR PETROLEUM REFINING AND PETROCHEMICAL PLANT

点击翻译按钮获取中文摘要

Experiments were conducted on flame quenching characteristic of ceramic type arrester and on wire gauze type arrester to design arrester set up position.For flame quenching characteristic of ceramic type arrester, it was shown that quenching ability was evaluated by the minimum flame velocity at which the flame passed through the arrester in propane-air system. With this critical velocity, good quenching ability was obtained for ceramic arrester compared with stainless steel crimped ribbon type arrester. Equivalent diameter and the length were important parameters, in flame quenching ability of these arresters especially for the arrester with smaller size of equivalent diameter than 2 mm, flame quenching ability increased with increase of the thickness remarkably. There were no material effect but surface roughness effect on quenching ability was obtained.The effect of position of arrester on flame quenching characteristic was also discussed. At curved region in piping flame velocity would be accelerated, and therefore arrester should not set up at curved region or just behind there. Because along with the flame propagation the flame temperature was increased, the arrester should be set up within short run up length. When the flame propagates downward, the flame often stagnates at the arrester, and some times the stagnated flame passed through after a certain stagnation time. In this case, the critical velocity is not a good factor to evaluate the quenching ability of arrester. Therefore, the arrester should not set up where the flame propagates downward.