关键词: 安全环保型, 硫化剂, FSA-55, 柴油加氢, 预硫化

Abstract:

The 2 MM TPY diesel hydrogenation unit of PetroChina Urumqi Petrochemical Company used a safe and environmentally friendly sulfurizing agent FSA-55 for catalyst pre-vulcanization for the first time, and the sulfurization effect was good, which is conducive to the green, safe, environmentally friendly, and low-carbon development of the hydrogenation unit. The vulcanizing agent FSA-55 has a large molecular weight, high flash point, low odor, low decomposition temperature, no partial vaporization phenomenon, and will not enter the hydrogenation tail gas and torch. It has technical advantages such as safety and environmental protection. It can decompose to produce butane, which is beneficial for maintaining the cyclic hydrogen purity during the vulcanization process. It also has the advantages of easy on-site safe loading and unloading operation, convenient storage, and no need for water sealing during tank storage. In June 2023, the diesel hydrogenation unit used FSA-55 for catalyst pre vulcanization. During the vulcanization process, the bed temperature rise was small, and the actual total vulcanization time was 28 hours, the amount of vulcanizing agent used was 34 tons. Compared with the original vulcanization scheme, it could reduce the catalyst dosage by 6.9 tons, shorten the vulcanization time by 6.0 hours, reduce fuel gas consumption by 5.5 tons, and reduce steam consumption by 75 tons at 1.0 MPa, and save hydrogen consumption by 80,750 m³, which had good economic benefits. After the device was fed, the sulfur mass fraction of each product was less than 1 μg/g, and the product quality was better than the design indicators.

Key words: safe and environmentally friendly, vulcanizing agent, FSA-55, diesel hydrogenation unit, pre-vulcanization