The first-class qualification rate of Yangzi Petrochemical's alkylated oil reaches 100%

China Petrochemical News Network News Since this year, the alkylation unit of Yangzi Petrochemical Plant has firmly established the concept of "quality first", focusing on product quality, and vigorously improving it through measures such as stable operation, detailed index analysis, labor competition, and quality tackling.
Product quality
.

As of the end of July, the qualification rate of the company's first-class alkylated oil has increased from 71% at the beginning of the year to 100%, and the overall quality of the product has been significantly improved

Carry out labor competitions to ensure quality control

On November 11, 2019, Yangzi Petrochemical’s 300,000-ton/year alkylation unit was successfully put into operation and produced qualified products the next day, creating favorable conditions for Sinopec to provide high-quality refined oil in East China
.

Alkylated oil has the advantages of high octane number, no olefins and aromatics, low sensitivity, good blending, good volatility, and clean combustion.
It is an ideal blending group for the production of high-grade gasoline or aviation gasoline.
Points
.

The octane number is an important indicator to measure the anti-knock resistance of gasoline.

In order to improve the qualification rate of the first-class products of alkylated oil, they have set up quality management personnel, compiled a multi-level quality management network, and clarified work standards and work specifications
.

Combining the "Comparing, Learning, Helping and Surpassing" activities and the team labor competition, they formulated the "Alkylation Device Key Parameters Control and Assessment Table", refined the quality index evaluation standards, strengthened quality tracking and assessment, and combined with the rationalization of the device, a daily one We will give corresponding rewards to teams and individuals who propose quality optimization, so that product quality management responsibilities and powers are clear, implemented at various levels, and rewards and punishments are clearly defined.

In order to effectively improve the awareness of product quality of all employees, the alkylation plant uses various forms of work groups, CPMS, and sub-class training to conduct quality education and publicity activities to improve the awareness of quality management of all employees
.

At the same time, it compiles accounts such as the monthly dynamic table of octane number of alkylated oil products, the monthly dynamic table of saturated vapor pressure, and the analysis record table to cultivate the habit of paying attention to quality

　　In addition, the device organizes team quality management knowledge training and QC training for young employees every quarter to improve the team’s learning and understanding of sampling management, quality risk management, systems, and standards
.

　　Optimize process indicators to improve quality

　　On the morning of August 10th, Wu Shanshan, the operator of the alkylation plant of Yangzi Petrochemical Company, found that the alkane ratio parameter had a significant decreasing trend during the monitoring.
After inspection, it was confirmed that the fluctuation was caused by the increase in load.
Then she carefully adjusted the feed rate and so on.
Measures to increase the normal level of alkane ratio to avoid product quality problems that may be caused by too low alkane ratio
.

　　The management personnel of the alkylation unit and each team started by optimizing the process indicators, tracking the raw material composition of the alkylation unit, the effect of the hydrogenation reaction in time, and closely monitoring the parameters of the reactor temperature, alkane ratio, pressure, etc.
, and finding product quality fluctuations in time Adjust the corresponding parameters; and track the product quality adding samples, and record the abnormal fluctuations of the product clearly in the shift record
.

　　Regarding the abnormal quality conditions and special operations during the shift, the alkylation plant conducts careful analysis, and carries out corresponding discussions and experience sharing, and conducts training, learning, and practice of beneficial operation methods in each team to continuously improve the entire staff of the plant Level of operation
.

　　The alkylation plant also combined with the "Quality Risk Management Implementation Rules" to carefully investigate the hidden quality hazards of the plant, formulate rectification plans and preventive measures, and continuously improve the quality management level of the plant
.

　　From January to July, the hidden quality hazards detected by the alkylation unit were mainly concentrated in the low octane number of the product
.

In this regard, they have reduced product quality fluctuations, eliminated product quality hazards, and continuously improved their quality management level by optimizing operations and careful adjustments

　　Reduce production costs to achieve high quality and low price

　　On the morning of July 8, Huang Yuanhao, the operator in the alkylation unit, carefully adjusted the compressor speed to the best state according to the actual conditions of the processing load and product output of the unit.
This careful operation not only ensured the safer and more stable operation of the unit, but also reduced the speed.
The processing loss rate of the device is improved
.

　　In the quality management work, the alkylation unit will also focus on reducing processing losses and energy saving and consumption reduction
.

　　The alkylation plant organizes management personnel to carry out technical research, continuously optimize the operation, and reduce the losses caused by water cutting, acid discharge, sampling, and device switching
.

They pay close attention to measurement management, strengthen source control, and regularly organize professionals to calibrate each material flowmeter to ensure accurate measurement and reduce measurement errors

　　In terms of energy saving and consumption reduction, the alkylation unit, on the one hand, sets up a responsible person according to the energy consumption standard form of the unit, tracks and optimizes system adjustments daily to reduce material consumption
.

On the other hand, strengthen the tracking and estimation of the incoming raw materials from outside the plant, and adjust in advance to avoid the energy loss caused by the large adjustment of the equipment load

　　From January to July, the equipment loss rate was steadily controlled at around 0.
3%, of which the equipment processing loss rate in July was 24.
25% lower than the same period last year, exceeding the overall goal of achieving a loss rate of ≤0.
36%
.

(Tao Yan, Teng Qingqing, Zhang Siyu)