【Sea River: Lessons from Others】Jilin Petrochemical Dye Factory optimizes the use of condensate, turning waste into assets and generating an annual savings of over 1.5 million yuan.

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Jilin Petrochemical Dye Factory turns condensate waste into a valuable resource through optimized utilization. On September 3, the latest data showed that the project to optimize the use of condensate in the Jilin Petrochemical Dye Factory was successful. 19.2 tons of low-pressure steam can be saved per day, resulting in annual cost savings of over 1.5 million yuan. According to the introduction. Before optimization, the MIBK unit produced 1.5 tons of saturated medium-pressure steam condensate per hour, while the falling-film evaporator produced 0.6 tons of condensate per hour. These valuable water resources and energy are sent directly to the thermal power plants, where the heat energy is lost uselessly without being fully utilized. The adhesive post-treatment system in the polyisobutylene plant consumes a particularly large amount of steam due to the high heating pressure required. The water wash condensate from the fulvalene tetrahydrogenation unit is discharged directly after single-use; not only is its utilization rate low, but it may also cause odor problems. Jilin Petrochemical Dye Factory established a special technical reform team to systematically identify all the locations where condensate is generated in the factory as well as its energy consumption needs. It formulated an overall plan for \"graded recovery and tiered utilization\" and carried out reforms to the existing systems. On the second floor of the polyisobutylene plant, the facility has added a 1-cubic-meter steam condensate flash tank. This flash tank introduces the two streams of condensate that would otherwise be wasted into the flashing process; the low-pressure steam generated at 0.25 MPa is then used for heating the glue treatment system. The condensate after flash evaporation becomes a new component in the domestic water storage tank, partially replacing the use of fresh water and thus enabling the recycling of water resources. Meanwhile, the plant also added two liquid condensate circulation pumps and one wastewater buffer pressure stabilization tank to the fulvalene tetrahydrogenation unit. Through clever modifications to the wastewater buffer tank and the washing water system, the washing condensate, which was previously used only once, can now be recycled. In this way, resource waste is reduced, and the environment both inside and outside the device is significantly improved. These improvement measures not only create a complete closed-loop system covering the generation, recovery, treatment, and reuse of condensate, thereby enabling the hierarchical utilization and efficient recycling of energy resources, but also provide employees with a safer and more comfortable working environment.