Liaohe Petrochemical Company strengthened its steam management and launched a comprehensive “steam-saving month†campaign. It is understood that as of February 28, 2012, Liaohe Petrochemical consumed 34,500 tons of steam, which consumes 14,800 tons of steam less than the same period of last year.
Steam and water, electricity, and wind are also called the four public systems of the refinery companies. They are used to provide heat tracing, production operations, and heating in the family area. As the country's largest heavy oil processing base, Liaohe Petrochemical has a high density of raw materials and products, which makes it necessary for the transportation of oil products to require a greater amount of steam than similar companies.
In the winter, the temperature in the north continued to be low, and large-scale projects such as reforming units and hydrogenation plants rushed to construct in the winter, causing steam supply to be tight. When the steam pipe network pressure was the lowest, it dropped to 0.6 MPa, far below the standard pressure of 1.0. Megapascal. The low steam pressure not only affects the adjustment of the production process and leads to unqualified product quality, but also leads to problems such as water hammer, oil and gas turbulence, and serious equipment shutdown. Whenever the production plant is engaged in coking operations such as cutting towers and steam consumption, the telephone in the dispatching room should be overwhelmed, demanding steam supply and pressure.
Liaohe Petrochemical's self-produced steam comes from the old and new boilers, external heat extractors and slurry steam generators of the catalytic device. The company's self-produced steam energy basically meets the company's summer steam demand, but the winter temperature is low, steam consumption increases, and steam needs to be purchased. In the face of self-produced steam capacity and limited outsourcing of steam quotas, the company has tapped its own potential for steam production and vigorously enhanced its steam management.
Liu Longjun, director of the purification plant equipment, was the first to focus on the change in acid water return flow rate of each unit. Due to the large amount of steam used by each unit, the total table of acid water recovery units showed that acid water recovered in January reached 70 tons per hour, which is 5 to 7 tons more per hour than normal. At this rate, the acid water treatment device of 80 tons per hour would be overloaded by the end of February. According to the acidic water return amount of each device, the purification plant eliminates factors such as the consumption of raw material oil and heating steam, repeatedly measures and compares, repeatedly launches the steam consumption of each device, and actively coordinates with the steam production workshop.
The estimated monthly steam consumption provides a basis for the implementation of refined steam management. The patrolling personnel through the encrypted patrol inspection, in a timely manner to find the lack of insulation and system leakage points, reducing the risk of steam leakage. According to the change in temperature, the operator carefully adjusted the amount of steam, steam trap opening and other operations. Utilizing the remaining temperature of the oil product before entering the tank to meet the transmission requirements of the multiple heating lines, the company has stopped the air, vented the air, wiped the lines, added blinding plates, and sprayed the valves of the stop hot line into red. Heater line used to distinguish.
In the previous heating period, Liaohe Petrochemical purchased 32,000 tons of steam for the heating system to ensure 2308 households in the family area and 310,000 square meters of heating. Before the winter heating system was put into use, the Liaohe Petrochemical Catalysis Workshop reclassified the low-temperature waste heat recovery sequence according to the principle of high-order energy utilization. The heating water system was reformed and optimized so that the heat exchanger tube shells were interchanged and heat was realized. To maximize recovery, the temperature of the Western District heating system has increased by about 10 degrees Celsius. According to the company’s leading team on benchmarking work, the amount of steam added during the entire heating period has been reduced by 20,500 tons. In accordance with the current average steam price, it is equivalent to an increase of 5.52 million yuan in benefits.
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