The catalytic device is the main device for the deep processing of crude oil by refineries. How to tap its potential and maximize its benefits? Jinzhou Petrochemical Company relied on technological innovation, continuously optimized the operation of its equipment, actively captured the benefits of growth, and achieved significant results. At present, the operation of the company's catalytic equipment is basically in perfect condition. It can increase the deep processing capacity of crude oil by 80,000 tons, save 3.73 million kilowatt-hours of electricity, and save 40,000 tons of steam, which can increase economic efficiency for enterprises by more than 8.6 million yuan.
Jinzhou Petrochemical has three sets of heavy oil catalytic cracking units with a total processing capacity of 3.2 million tons per year. Due to the frequent occurrence of excessive amplitude of the smoke machine, leakage of the waste heat boiler and abnormal fluctuation of reaction conditions in the early stage of operation of the catalytic device, not only the catalytic cracking processing capacity can not reach the design value, but also the burning capacity is insufficient, and the operating time of the smoke machine is short. The short start-up cycle has become a bottleneck restricting the long-term stable operation of the device, which has seriously affected the efficiency of the enterprise. The management of the company attaches great importance to the operating status of the catalytic devices. It has conducted several special meetings and special studies and is determined to change the current operating status of the catalytic devices.
In early 2007, Jinzhou Petrochemical decided to set up a long-term stable operation team of catalytic cracking equipment consisting of a group of catalytic device experts, with the company’s general manager as the leader and the deputy general manager as the executive deputy leader.
In order to solve the problems of catalytic devices effectively and steadily, the long-term stable operation team of the catalytic cracking unit through a special discussion, brainstorming, out research and expert verification, research and development of the transformation program. In August 2007, the company implemented a major overhaul of the two catalytic devices. In this transformation, the use of auxiliary combustion chamber air distribution plate replacement, scorch tank catalyst large hole distribution plate wear pipe diameter expansion, three-rotation system transformation, increase the four rotation, raw oil feed nozzle change new type, stripping There are seven technical renovation measures, such as the transformation of the section grille and the modification of the single-stage smoke machine. From April to May of this year, the company implemented a 47-day overhaul reconstruction on the three catalytic devices, completing a total of 270 technical transformation projects including a smoke machine, a settler, repeated whirlwind and three rotations, a feed nozzle, and a waste heat boiler.
Through technological transformation, Jinzhou Petrochemical effectively solved the bottleneck in the early operation of the catalytic device. The data show that the ratio of raw materials mixed with slag in the two catalytic devices has been significantly increased. The daily processing volume has been increased from 2,800 tons before transformation to 3,000 tons; the catalyst loss has dropped from 0.6 kilograms per ton to 0.35 kilograms; the smoke dust content has been from 200 milligrams per cubic meter. Drop to 100 mg; the hood runs smoothly; the use of CO oxidizer drops from 2 to 3 tons per month to 1 ton. On May 31, the tri-catalyst device was successful after a major overhaul. After calibration, the daily processing capacity of the device was increased from 4,800 tons to 5,000 tons; the dust content of flue gas was reduced from 100 mg/m3 to 50 mg; the smoke machine operated smoothly; the medium-pressure steam output increased from 35 tons per hour to 52 tons. , The temperature increased from 390 degrees Celsius to 420 degrees Celsius; solved the problem of overheating in the CO furnace; various operating indicators set the best in history.