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19^th Sep 2019 

• In 1986, the 300,000 ton/year ethylene plant was completed and put into production.
• In 1999, the 480,000 ton/year ethylene technology transformation was successfully completed.
• In 2004, the 600,000 tons/year ethylene expansion project was completed and put into production.
• In 2012, the 1.2 million tons/year ethylene expansion project was completed and put into production.

(Source)

26^th June 2019

On May 7 in the large ethylene plant production unit No. 1, the No. 9 cracking furnace broke the previous history of 63 consecutive days of online operation and created the longest continuous operation cycle record of 118 days, ranking first among the same type of cracking furnaces in PetroChina. 

The ethylene plant has three ethylene production units, with various types of cracking furnaces, many types of cracking raw materials, and large differences in quality. In particular, the first ethylene unit has a complex raw material composition and is difficult to operate. Changes in the composition and feed amount of the materials will increase the tendency of coking in the furnace tubes, which is not conducive to the long-term operation of the cracking furnace. However, it is also the "big brother" and leader of the three ethylene units. It was built more than 30 years ago. The process used by the American S.W. Company at that time is now at a backward level of technology, and the maintenance difficulty is incomparable with similar cracking furnaces that have been put into operation in recent years.

(Source)