本刊讯（通讯员王玉清）昔日在炼油厂上空烈焰熊熊、黑雾弥漫的放空火炬现在已变成了若有若无的小火苗．这是该厂采用多种措施回收干气、治理大气污染后收到的明显效果．截止今年4月底，这个厂已累计回收平气2万多吨，价值2100万元．干气主要来源于炼油厂催化裂化、热裂化等二 Our correspondent (correspondent Wang Yuqing) In the past flames over the refinery flames, black smoke diffuse venting torch has now become Ruoyouruowu small flame. This is the factory adopted a variety of measures to recover dry gas, air pollution control received after the obvious effect. As of the end of April this year, the plant has recovered more than 20,000 tons of flat gas, worth 21 million yuan. Dry gas comes mainly from refinery catalytic cracking, thermal cracking and other two