气化炉壳体环缝频繁开裂的技术分析

The Technical Analysis of Crack on the Gasifier Shell Girth

鲁奇固态排渣加压气化炉成本低、效益高,在煤化工领域得到广泛应用。其本体采用的BHW35钢(相当于13Mn Ni Mo54)合金元素含量较高,淬硬倾向较大,在制造、返修过程中,如果工艺控制不当,容易产生冷裂纹和再热裂纹,再加上气化炉特殊的操作工艺,频繁的升压、降压,使用中更容易诱发裂纹。本文着重分析气化炉壳体产生裂纹的原因,并提出应对措施。

Luqi solid-state discharge pressurized gasifier with low cost and high efficiency, has been widely used in the coal chemical industry. Whose matrix with higer hardening tendency, is made of the BHW35 steel（equivalent to 13MnNiMo54） alloy element with higher content. It is easy to produce cold crack and reheat crack in the process of manufacture and repair if the process control is improper. Furthermore, the operation of the special gasifier craft, frequent step-up and step-down pressure, is more likely to induce cracks. The author emphatically analyses the reason of gasiifer shell crack, and puts forward the countermeasures in the article.