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As temperatures in the north gradually rise, the heat energy used by the production units of refining and chemical enterprises changes accordingly. Harbin Petrochemical Company precisely regulates the utilization of thermal energy to improve the level of its comprehensive thermal energy utilization. The company’s production technology department adjusts the water temperature of the low-vacuum heating system in response to changes in temperature; as a result, the temperature of the heating return water decreases by 6 degrees Celsius. By adjusting the heating capacity of the low-temperature heating systems and the crude oil heaters, as well as by increasing heat supply to the gas separation unit and shutting down the air-cooling systems used in those low-temperature systems, 6.5 tons of steam can be saved per hour. At the same time, professionals from the production, storage and transportation, and power sectors inspected on-site the steam tracing systems of the equipment as well as the locations where steam is used in various processes, in order to determine the actual usage patterns of the steam system and provide data support for further optimization. Haha Petrochemical also established a technical task force in 2022 to reduce fuel and power costs, identified 45 measures to cut costs and improve efficiency, and has continued to work on implementing these measures. At the beginning of March, in accordance with the plan for advancing combustion and power generation technologies, and by taking advantage of the two hydrogenation units to increase the proportion of diesel used in production thereby boosting the output of aviation fuel, the hydrogenation reforming unit was successfully shut down. The feed heater for the hydrocracking unit was also shut down through the use of direct heat supply and optimization of the unit’s heat exchange network; this resulted in a savings of 35,000 kWh of electricity per day and 12 tons of fuel gas per day, leading to annual cost savings of 19 million yuan in terms of combustion and power generation expenses.