Abstract:

The scaling of high pressure heat exchanger between feedstock and reaction effluent in residue hydrogenation unit of J Petrochemical Company caused the decrease of heat exchange efficiency, which directly affected the stable operation and benefits of the unit. Through comparison with similar domestic units, it was found that the selection of medium in the shell and tube side of high pressure heat exchanger and the flow rate of fluid had a great impact on the scaling of high pressure heat exchanger. Based on the operation experience of similar units, the proposed measures to improve the scaling of high pressure heat exchanger were put forward. On the one hand, the feedstock properties and hydrogen-to-oil ratio during the operation of the unit were well controlled to slow down the scaling tendency of high pressure heat exchanger. On the other hand, by adding a high pressure heat exchanger, exchanging the medium of the shell and tube side, and optimizing the design of the heat exchanger, the heat exchange efficiency of the heat exchanger was fundamentally improved.

Key words: residue hydrogenation unit, high pressure heat exchanger, heat exchange efficiency, scaling, feedstock properties, structural style

摘要：

J石化公司渣油加氢装置原料油与反应流出物高压换热器结垢引起换热效率下降，直接影响了装置的稳定运行和效益。通过对比国内同类装置发现，高压换热器管壳程介质的选择及流体的流速对换热器结垢影响较大，借鉴同类装置运行经验，提出了改善高压换热器结垢情况的建议措施：控制好装置运行期间的原料性质和氢油比，减缓高压换热器的结垢倾向；通过增设一台高压换热器、互换管壳程介质、优化换热器的设计，从根本上改善换热器换热效率。

关键词: 渣油加氢装置, 高压换热器, 换热效率, 结垢, 原料性质, 结构型式