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A few days ago, the No.
10 cracking furnace of Qilu Petrochemical Olefin Plant was successfully put into production after three days of maintenance
.
Since late March, the plant has continued to optimize the structure of raw materials, finely operate and stabilize key equipment, and optimize the cracking depth to calculate the benefit account, which has achieved sustained high and stable production of the ethylene unit
.
Adjust the structure of production raw materials, and increase efficiency by processing more naphtha
"The price of naphtha has dropped significantly recently.
Increasing the proportion of naphtha in the raw material can reduce production costs and improve the level of efficiency
.
Since March, the international oil price has fallen sharply, the price of naphtha has fallen to a low point, and the marginal benefit is high; the cost of ethane has not changed much, and the marginal benefit is relatively low
.
After running this mode for two months, in order to relieve the naphtha supply pressure caused by the overhaul of the refinery in the second half of the year and cope with the rise in naphtha prices, they resumed the operation mode of five ethane light hydrocarbon furnaces
.
"Although the '7+2+4' model has only been running for two months, the efficiency increase is very obvious
.
Optimize the structure of gas raw materials, "eat and squeeze" every drop of raw materials
Under the unified coordination of the company, the plant strengthens the quality management of raw materials, controls the quality of naphtha and hydrocracking tail oil from the source, and conducts single-transport, single-storage, and single-fracture of Chang-line naphtha
.
At the same time, in the face of rapid changes in the raw material and product market, they optimized the ethane input plan in the gas raw material of the ethylene plant, reduced the input of ethane, increased the input of saturated liquefied gas, increased the total input of the unit, and ensured the output of ethylene.
At the same time, efforts are made to increase the production of propylene with high marginal benefits
.
"After the adjustment of the structure of gas raw materials, excluding the influence of factors such as load reduction of downstream devices and high ethylene inventory, an efficiency increase of 5 million yuan has been achieved
.
" Gao Tongwei, chief of the production scheduling section of the plant, said
.
Special care for key units, precise operation to control compressor oil temperature
"In order to stabilize the shaft displacement of the GB-501 propylene compressor, we control the oil temperature deviation of the compressor within 0.
5 degrees Celsius
.
" In the main control room of the ethylene plant, Zhang Jian, the deputy squad leader of a separate group, and his colleagues adjusted the compressor's oil temperature.
Oil temperature
.
Ensuring the stable operation of the core unit of the ethylene plant is critical to increasing the output of ethylene
.
The compressor has been running continuously for more than 3 years, and the shaft displacement tends to increase gradually.
If the control is not good, the normal operation of the compressor will be greatly affected, and the goal of increasing the production of ethylene and propylene will also fail
.
To this end, the plant set up a special care team to adjust the temperature of the cracking furnace and the amount of oil in time according to the changes in upstream raw materials to ensure that the oil temperature and shaft displacement are within a reasonable range
.
On-shift employees pay close attention to shaft displacement and oil temperature changes, record and report on a regular basis.
When there are obvious changes, technicians will guide the on-duty employees to adjust in real time according to the on-site situation
.
At the same time, they also implemented card edge operation on steam and other systems to keep the temperature of ultra-high pressure steam above 505 degrees Celsius, supplying sufficient energy for the high-load and stable operation of the device; implementing the summer high-load production plan to address the problems of propylene refrigeration and rectification systems Carry out optimization and transformation, and keep the equipment in good operating condition by cleaning the heat exchanger of the quenching system and other measures
.
