Qilu Petrochemical Co., Ltd. Practices the Three-character Sutra for Safety

China Petrochemical News Network News May 25, Qilu Petrochemical’s olefin plant cracking workshop, the internal operator Lurao kept an eye on the data uploaded and output on the screen, ready to make fine-tuning at any time, while the external operator Huo Mingren shuttled between the silver towers without interruption.

Since April, in the face of difficulties such as the implementation of defect-elimination and maintenance in downstream production plants and the increase in hidden dangers at the end of equipment operation, olefin plants have continued to increase coordination between upstream and downstream production plants, balanced and optimized raw materials, and adopted many measures such as “guarantee, quality, and stability”.

Guarantee: balance and optimize raw materials

Sufficient high-quality raw materials are the prerequisite for more propylene production.

According to the raw material situation, the plant timely optimized the balance, and most of the time implemented the operation mode of 6 naphtha + 2 tail oil + 5 ethane light hydrocarbon cracking furnaces to consume as much as possible the company's own raw materials.

During the period, the olefin plant storage tank volatile gas treatment phase III project is being intensively promoted.

On the basis of increasing the input of self-produced raw materials, we actively contacted the material equipment center to purchase light hydrocarbons and LNG and ethane to achieve uniform entry into the plant, and the raw materials have more guarantees.

Excellent: fine-tuned operation

"The upstream and downstream raw materials are docked every day, the daily optimization plan is implemented, and the fine adjustment of the cracking furnace is done.

In the cracking workshop, the cracking furnace can be flexibly switched according to the changes in raw materials and the calibration results.

In addition to the single-storage-single refining for the first-line raw materials of Sanchang, the cracking furnace is calibrated in time based on the characteristics of other raw materials, and a reasonable outlet temperature of the cracking furnace is set up according to the calibration results, and the gasoline ratio of the cracking furnace is appropriately increased to avoid changes in the quality of naphtha.

"The tail oil cracking furnace is 810°C, the naphtha cracking furnace is 830°C, the light hydrocarbon cracking furnace is 854°C, and the Sanchang first-line cracking furnace is 813°C.

They also rationally optimized the gas raw materials, and realized special cracking of light hydrocarbons and ethane, and changed ethane from No.

Stable: safe, stable and effective

The ethylene plant at the end of the overhaul has many potential safety hazards, and ensuring the safe and stable operation of the plant is the basis for stable and high output.

The olefin plant has carried out "trustworthy" small-indicator labor competitions, special safety operations, and special safety inspections throughout the plant, focusing on the stable operation of the equipment, the improvement of process indicators, and the production quality, etc.

During operation, patrol inspection, weekly inspection, and on-the-job inspection, cadres and employees discovered and eliminated many hidden accidents in time, ensuring the safe and stable operation of the device.

In the early morning of April 18, the cracking team Changsha Liangfu found noise in the quench oil pump GA-104E pump during on-site operation, and it was preliminarily judged that there was a problem with the pump's lubrication system.

　　At present, Qilu Petrochemical's ethylene plant continues to maintain a good situation of safe and high-load production.

　　(Liu Xinsheng)