精对苯二甲酸装置氧化反应器国产化扩容设计与改造

Domestic capacity expanding design and innovation of PTA plant oxidation reactor

介绍了PTA氧化反应器由225 kt/a扩容至600 kt/a的设计原理。以工业试验数据确定氧化反应器温度,依据温度确定反应器压力,确定了氧化反应器的设计温度280℃和设计压力2.15 MPa;以生产装置得到的反应物料停留时间和传质数据等数据,确定了氧化反应器的设计尺寸Φ8 000 mm×9 500 mm。提出了大型氧化反应器须改用新型搅拌机,以增加传质速度。国内自主扩容设计的氧化反应器投入生产后,运行情况良好,产品质量达标,PTA装置产量达到了650 kt/a,超过了设计能力。

The design principle of expanding the capacity of PTA oxidation reactor from 225 kt/a to 600 kt/a is presented.The temperature of oxidation reactor is obtained by theoretical calculation and industrial experimental data,which is used to get the pressure of oxidation reactor.The design temperature and pressure of oxidation reactor are 280℃ and 2.15 MPa,respectively.The design size of oxidation reactor is Φ8 000 mm × 9 500 mm,which is calculated according to residence time of materials and mass transfer data of process units.Large oxidation reactor is proposed to use a new type mixer to increase the mass transfer rate.The oxidation reactors with independent capacity design in China operate well,and the products are of standard quality.The production of PTA are up to 650 kt/a,which excess the design capacity.