加氢裂化换热器阻垢剂的研制

为解决加氢裂化装置换热器换热效率下降而影响装置正常运转这一问题,通过对其结垢原因和机理分析,针对性地研制出了一种耐高温阻垢剂RIPP-7051。通过红外光谱测定发现,未注入阻垢剂时原料经加热产生的烷基和芳基的吸收峰主要在3 352和1 448 cm-1处;同样条件下注入阻垢剂200μg/g,上述吸收峰几乎消失,新产生的吸收峰在570 cm-1附近。说明积垢可能是含有活泼氢的聚合物,阻垢剂的注入抑制了这类物质的生成。对加入一定量的阻垢剂的原油,通过实验室静态和动态评定方法进行实验,均有明显的效果;阻垢效率随着阻垢剂用量的增加而提高。工业实验表明,阻垢效果显著。

Research and development of a new fouling inhibitor for heat exchangers in hydrocracking unit

To solve the problem of gradual decrease of heat transfer efficiency of heat exchangers in hydrocracking unit, a new high-temperature resistant fouling inhibitor RIPP-7051 has been suceessfully devel- oped through the study of fouling causes and the fouling formation meehanisms in heat exchanger of a hydrocracking unit. IR spectra has found that the absorption peaks of the fouling from heating of the feedstock are at 3 352 cm^-1 and 1 448 cm^-1 , When the RIPP-7051 fouling inhibitor was injeeted to the feedstoek at a dosage of 200 mg/kg, these peaks almost completely disappeared, and a new peak at 570 cm^- 1 was observed. This indicates that the fouling may be the polymers containing active hydrogen, and the addition of RIPP-7051 can effeetively inhibit their formation. The laboratory statie and dynamie analysis of the feedstock with certain amount of fouling inhibitor shows that the fouling inhibition is obvious. The fouling inhibition rate increases with inereased fouling inhibitor dosage. The commercial application also proves its good inhibition performance.