[Hai Chuan: Lessons from Others] The desulfurization unit has effectively reduced the loss of desulfurization solvent by implementing a technical modification involving “temperature and pressure reduction” of steam

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Since the beginning of this year, Jinling Petrochemical’s No. 1 desulfurization unit has successfully reduced the loss of desulfurization solvents by implementing steam \"temperature and pressure reduction\" technical upgrades. In the first 2 months, the amount of fresh solvent replenished for this device decreased by 50% on a year-on-year basis.   During normal operation of Desulfurization Unit 1, the concentration of the desulfurization solvent must be maintained at 30% to 40%. Previously, due to the high steam temperature, the formation of thermally stable salts in the solvent occurred at a rapid rate, leading to severe solvent consumption and a continuous decrease in concentration. This requires the addition of large amounts of fresh solvent to ensure desulfurization efficiency, further increasing the operating costs of the plant.   To address this challenge, Jinling Petrochemical established a technical task force to develop a plan for technological upgrades aimed at reducing the temperature and pressure of steam. In January, the temperature and pressure regulators were successfully put into use, allowing the steam temperature to be controlled at 150 degrees Celsius. This technical upgrade effectively reduced the loss of desulfurization solvents, thereby lowering the operating costs of the facility.