Could everyone please help recommend what size would be appropriate for a newly built gas tank?
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A company’s main production facilities include one 300,000 tons/year atmospheric and vacuum distillation unit, one 1.2 million tons/year atmospheric and vacuum distillation unit, one 200,000 tons/year heavy oil catalytic cracking unit, one 600,000 tons/year heavy oil catalytic cracking unit, one 80,000 tons/year gas fractionation unit, one 150,000 tons/year gas fractionation unit, one 60,000 tons/year polypropylene production unit, one 60 t/h acidic water stripping unit, one 10,000 tons/year sulfur recovery unit, one 1 million tons/year delayed coking unit, one 600,000 tons/year catalytic gasoline and diesel blending hydrogenation unit, one 10,000 m3/h hydrogen production unit, and one 30,000 tons/year MTBE production unit. In order to recover flare gas, the company intends to build a gas holder; therefore, I would appreciate it if you could help estimate what capacity would be appropriate for such a gas holder, based on your own experience or design knowledge related to similar facilities
This needs to be calculated based on the gas composition and the amount of gas your company wishes to recover.
The main production units of a certain company include one unit with a capacity of 4.2 million tons per year for atmospheric and vacuum distillation, one unit with a capacity of 1 million tons per year for heavy oil catalytic cracking, one unit with a capacity of 800,000 tons per year for heavy oil catalytic cracking, one unit with a capacity of 300,000 tons per year for gas fractionation, one unit with a capacity of 150,000 tons per year for gas fractionation, one unit with a capacity of 60,000 tons per year for polypropylene production, one unit for acidic water stripping with a capacity of 60 tons per hour, one unit for sulfur recovery with a capacity of 10,000 tons per year, one unit for delayed coking with a capacity of 800,000 tons per year, one unit for the hydrogenation of catalytic diesel and gasoline with a capacity of 1 million tons per year, one unit for hydrogen production with a capacity of 10,000 cubic meters per hour, and one unit for MTBE production with a capacity of 30,000 tons per year. The gas storage tanks consist of one dry tank with a capacity of 20,000 cubic meters; before 2004, there were two wet tanks, each with a capacity of 5,000 cubic meters. Pay attention to the operations and control the timing of releasing low-pressure gas into the gas holder; 2*5000 is also sufficient to meet the requirements, but this requires careful and dedicated effort from the dispatchers and workshop operators. Atmospheric tanks offer good safety, which saves everyone trouble. Moreover, since the two small wet-type gas tanks were severely corroded and needed to be scrapped, they were replaced with atmospheric tanks. Additionally, the atmospheric tank had some processing issues for a period of time, and it was unavailable for about 50 days; however, by using screw compressors to extract gas from the low-pressure gas system pipelines, normal production was maintained, and the amount of gas released was not significant. Reducing the amount of low-pressure gas vented from units such as catalytic, coking, hydrogenation, and reforming units is key. Attention must be paid to both design and operation.
It is recommended to construct two units with a capacity of 5,000 cubic meters, as allowed by the regulations; this will make operations and subsequent control easier and more convenient!