The practical example given in this paper are: the potential aromatics content in the feedstock is about 41 %, the average reaction pressure of the reformer with continuous catalyst regeneration and with semi-regeneration are 1 .2MPa and 0. 35MPa, and the reaction volume space velocity are 2. 1h- 1 and 2. 0h-1 respectively.
By means of whole process analysis on handling procedure of serious leakage occure in semi regeneration slide valve stuffing box for same level parellel type catalytic cracking unit,the working plan and application analysis,on plugging leakage technology accompanied with pressure and no shut down for solving the catalyst leakage creatively,are mentioned.
In construction of new catalytic reforming units and capacity expansion of old ones,following problems should be noted: (1) For a new reforming unit,selecting semi regeneration or continuous catalyst regeneration reforming process depends on the requirements of the octane number of reformed gasoline, the hydrogen yield and processing capacity of the unit.
Following technologies were adopted in design of the unit, prehydrotreating plus stripping tower for pretreatment,a lower pressure of 2.2 MPa at inlet of the prehydrotreating reactor,fixed bed reforming with catalyst semi regeneration for forepart of the reformer and moving bed reforming with continuous catalyst regeneration for the back, "dry cold" recycle process for catalyst regeneration system.
The article analyzes the development situation and environment of catalytic reforming process,and points out that semi regeneration units are the dominating units in catalytic reforming processes now and the increased capacity is mainly obtained by revamping projects.
In comparison with the fixed bed semi-regenerative reforming, this process has the following advantages: 1 ) reaction selectivity is improved and the yields of reformed gasoline and hydrogen increased, while yields of C1 and C2 decreased evidently;
The selection between continuous catalytic reforming and semi-regenerative reforming is discussed based on conversion, selectivity, operating cycle, energy consumption, and capital investment of a unit.
This article summarized the work that has been carried out for preventi-ng the plugging of the inlet of chloride injection tube and the fracture of we-lding seam between chloride injection tube and process piping in a semi-rege-neration catalytic reforming unit.The work has been proved to be effective inmaintaining save,smooth and long-lasting operation of the catalytic reformingunit.
The improvement on process and equipment of the feed pretreatment unit and the reformate separation section of the reformer is presented. Process and control systems of both the pretreaterand the reformate liquid recovery are analysed and studied. Two types of radial reactor (up-flow anddown-flow centre pipe reactors) are also introduced. For semi-regenerative catalytic reformer, the up-flowreactor is preferred.
A second hand cyclic regeneration reformer was transformed into a semi-regenerationunit. The start-up and the complete unit mass balances are presented. The technical transform was successful. The catalysts, RN-1 hydrotreating catalyst and CB-6 & CB-7 reforming catalysts, exhibited goodperformances.