In 2007, under the influence of continuously changing crude oil processing varieties, multiple sets of newly-built installations, the increase in secondary processing load, and the expansion of public utilities and storage and transportation systems, Dalian Petrochemical Company unwaveringly took the path of scientific development and launched Technological innovation, deepening of technological transformation, implementation of energy-saving measures and other means to improve the level of fuel and other system resources management, comprehensive energy consumption of oil refining reached 70.7 kg of standard oil / ton.
Heating furnace fuel consumption plays an important role in the energy consumption of refineries. The company reconstructed the air preheater of the two-distillation atmospheric and vacuum unit heating furnace, using an inorganic heat transfer tube heat exchanger instead of a spoiler tube heat exchanger, so that the air temperature of the furnace was increased from 80°C to 200°C. The exhaust gas temperature of the furnace was reduced from 300°C to 210°C, the thermal efficiency was increased from the original 83% to the present 89%, and the annual fuel saving was 4,000 tons. The 27 burners of the heating furnace were reformed, and burners for burning high hydrogen fuels were developed and applied to meet the gas composition requirements of the pipeline network. After the renovation, the average furnace temperature dropped from 694 °C to 658 °C, the exhaust temperature dropped from 310 °C to 202 °C, thermal efficiency from the original 82.7% to the current 88%.
The second refining device is located at the end of the gas pipeline network. There are many impurities in the gas, and fouling in the convection chamber is serious due to combustion in the heating furnace, which may even result in reduced production of the device. The company uses a chemical cycle cleaning process with a cleaning cycle of only 3 to 5 days to clean the convection oven tubes of the two heating furnaces so that the convection outlet temperature on the heating furnace is increased by about 15°C, and the exhaust gas temperature is reduced by more than 30°C. Greatly improve.
Actively take measures to improve the efficiency of energy recovery and reduce steam consumption. The company replaced three groups of three-catalyst waste heat boilers, economized one evaporating section into a superheated section, installed 30 sonic-dust precipitators, reformed the steam-blast steam separator, reduced the exhaust gas temperature of the waste heat boiler, and recovered more smoke each year. The residual heat is equivalent to 2600 tons of standard oil, which reduces the energy consumption of the device by 1.7 units.
Dalian Petrochemical also established and improved the steam pipe network dynamic management system of the whole plant. With the help of sophisticated measurement methods, advanced simulation technology and network platform, the steam consumption of each production unit was timely balanced, and the heat loss and pressure loss of the entire steam pipe network were dynamically analyzed. And the distribution of condensate, timely solve some problems such as large heat loss of the equipment, reducing the condensing and emptying of steam, energy saving effect is significant.
Heating furnace fuel consumption plays an important role in the energy consumption of refineries. The company reconstructed the air preheater of the two-distillation atmospheric and vacuum unit heating furnace, using an inorganic heat transfer tube heat exchanger instead of a spoiler tube heat exchanger, so that the air temperature of the furnace was increased from 80°C to 200°C. The exhaust gas temperature of the furnace was reduced from 300°C to 210°C, the thermal efficiency was increased from the original 83% to the present 89%, and the annual fuel saving was 4,000 tons. The 27 burners of the heating furnace were reformed, and burners for burning high hydrogen fuels were developed and applied to meet the gas composition requirements of the pipeline network. After the renovation, the average furnace temperature dropped from 694 °C to 658 °C, the exhaust temperature dropped from 310 °C to 202 °C, thermal efficiency from the original 82.7% to the current 88%.
The second refining device is located at the end of the gas pipeline network. There are many impurities in the gas, and fouling in the convection chamber is serious due to combustion in the heating furnace, which may even result in reduced production of the device. The company uses a chemical cycle cleaning process with a cleaning cycle of only 3 to 5 days to clean the convection oven tubes of the two heating furnaces so that the convection outlet temperature on the heating furnace is increased by about 15°C, and the exhaust gas temperature is reduced by more than 30°C. Greatly improve.
Actively take measures to improve the efficiency of energy recovery and reduce steam consumption. The company replaced three groups of three-catalyst waste heat boilers, economized one evaporating section into a superheated section, installed 30 sonic-dust precipitators, reformed the steam-blast steam separator, reduced the exhaust gas temperature of the waste heat boiler, and recovered more smoke each year. The residual heat is equivalent to 2600 tons of standard oil, which reduces the energy consumption of the device by 1.7 units.
Dalian Petrochemical also established and improved the steam pipe network dynamic management system of the whole plant. With the help of sophisticated measurement methods, advanced simulation technology and network platform, the steam consumption of each production unit was timely balanced, and the heat loss and pressure loss of the entire steam pipe network were dynamically analyzed. And the distribution of condensate, timely solve some problems such as large heat loss of the equipment, reducing the condensing and emptying of steam, energy saving effect is significant.