A reactor with a pressure of up to 2,800 kg was installed at the production site of the polyethylene plant at Shanghai Petrochemical Plastics Division No. 2. Since 2016, operators of the plant have found gas leaks on the tube bundle of the reactor twice and twice It was such a high-risk risk point that I was awarded a company-level reward for "diagnosing safety." In a risk assessment conducted by this year's installation, it unexpectedly failed to 'take the lead.'
The reason for such an unexpected situation is that the new Polyethylene Joint Unit No. 2 assessment carried out this time uses a new tool called Sinopec Risk Quantization Matrix.Taking the high-pressure polymerization process of the unit as an example, As a case study, all kinds of incidents happened are input to the matrix table. Then, based on the frequency of these incidents and the seriousness of the consequences of the accident, two horizontal and vertical axes of the matrix are designed to get different risks Quantitative Risk Values By sorting these risk values, the final result is obtained.
According to No. 2 Polyethylene Joint Safety Director Chen Yong introduced precisely because of the high pressure reactor pressure, so the reactor is set around a large number of sensors and alarm, and masonry thick explosion-proof wall, for this accident occurred The frequency is not high, so in the quantitative evaluation process, these measures have reduced the risk level of the reactor.On the other hand, people have not noticed the product filling station, although the scale is small, but because of the variety of chemical filling Considering that there are many accidents at similar filling stations both at home and abroad, the calculation results show that the product filling station is the most dangerous place for the whole set of equipment. Further effective measures need to be taken to reduce the risk of filling operations.
The accidental 'drop-off' of the high-pressure reactor was only a small episode of the Quantified Safety Assessment conducted by Sinopec's pilot project of using the new quantitative risk matrix of Sinopec.
At the beginning of this year's "Plan for HSE Work in Shanghai Petrochemical 2017," the company demanded that the plastics department adopt the new mathematical statistics tool of risk quantification matrix and take the lead in conducting a new safety assessment on the main production plant. After preliminary preparation and special study , The plastics department started the work in the second quarter of this year and after six months of hard work, the first batch of the first batch of 6 sets of main production devices have been initially completed.
With the release of the first assessment report, learning has become a major task in front of production facilities.
Gao Guoqiang, director of the safety department of the plastics industry, believes that the "portrait" of the risks obtained through the quantitative assessment is more specific and targeted than the commonly used post operation method and contingency plans.
In the No. 2 polyethylene complex, the supervisor Zhu Zhenghui expressed his approval of Gao Guoqiang. He said they evaluated 41 risk outcomes this time. Each of the results has risk content, potential harm and countermeasures and is strong Operability.
While initial results were obtained, Shanghai Petrochemical Co., Ltd. has started to summarize the assessment of the plastics department.According to Sun Xuhui, director of the company's safety and environmental supervision department, the ultimate goal of quantitative risk assessment is to identify real big risks and to take effective measures to reduce these Risks from the level of risk assessment of foreign companies to experience the experience of collecting a large number of proven cases of accidents and the use of advanced computing software is to ensure that the results of the assessment of the real and effective cornerstone of the Shanghai Petrochemical quantitative risk assessment carried out this Conclusions There is also a lack of strong support for big data, which takes time to further test and judge.
In the future, on the basis of the current work, Shanghai Petrochemical will conduct a continuous assessment of the production units that completed the first round of assessment work, explore and accumulate data through practice, improve the corresponding institutional mechanisms, and at the same time, they will continue to expand the quantitative assessment of risks Range, and strive for early realization of all the full coverage of all production equipment, and truly 'identify the big risks, eliminate major hidden dangers and eliminate major accidents'.