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本文叙述国内自己设计制造52万吨/年尿素合成塔的主要结构设计与主要零部件制造工艺及组合检验。该塔的外壳和衬里采用多层包扎结构,上下封头采用整体冲压半球形封头,封头内壁采用带极堆焊耐腐蚀不锈钢。该塔的制造成功,比较完满地解决了大型高压耐腐蚀设备的技术关键,为我国制造大型高压容器和耐腐蚀衬里结构的大型反应器开创了一条新路。
This article describes the domestic design and manufacture of 520,000 tons / year of the main structural design of urea reactor and the main parts manufacturing process and combined inspection. The tower shell and lining with multi-layer bandaging structure, the upper and lower head with the overall stamping hemispherical head, seal the inner wall with a hard surfacing corrosion-resistant stainless steel. The successful manufacture of the tower has completely solved the technical problem of large-scale high-pressure corrosion-resistant equipment and opened a new road for the large-scale reactor in China to manufacture large-scale high-pressure vessels and corrosion-resistant lining structures.