Provide accurate and integrated services for petrochemical enterprises and engineering companies in the petrochemical field
Foreign countries have applied advanced control technology to more than 90% of atmospheric and vacuum units, catalytic cracking units, hydrogenation units, etc., and achieved considerable benefits. At present, Weilande has marketed products including: crude oil blending system, gasoline and diesel blending system, online near-infrared oil property analysis system, rapid evaluation system of all oil properties, and equipment quality optimization control system.
Product qualitative goals:
1) Fully consider the enterprise's demand for product quality upgrading, and meet the higher requirements of the country on the quality index of refined oil;
2) Optimize the component oil formulations of gasoline and diesel, rationally use component oils, and reduce blending costs;
3) Increase the combined power of gasoline and diesel at one time, improve the efficiency of blending, and shorten the blending cycle;
4) Realize precise control of the quality of gasoline and diesel products, reduce excess quality, and increase economic benefits;
5) Optimize the crude oil mixing ratio, realize online crude oil blending, stabilize the total feed properties of the primary processing unit, and reduce crude oil processing costs;
6) Optimize the crude oil blending plan, increase the utilization rate of crude oil, and save crude oil procurement costs;
7) Reduce dependence on experienced technicians and reduce labor intensity of workers;
8) Better monitor the entire blending process, improve storage tank utilization, and reduce inventory.
Product quantitative target:
1) Gasoline blending: On the premise that the sulfur content, olefins, anti-knock index and other indicators meet the quality requirements, the excess octane number is not more than 0.3 units, shortening the single blending time by more than 20%, and the single blending power is not less than 95%.
2) Diesel blending: Under the premise that the cold filter plugging point, flash point, cetane number and other indicators meet the quality requirements, the excess freezing point is not more than 2℃, and the single blending time is shortened by more than 20%. Less than 98%.
3) Crude oil blending: control index API, sulfur content; monitoring index: 38℃, 105℃, 165℃, 365℃ and 565℃ real boiling point yield, total acid value, naphtha yield, reduced residue yield, Viscosity.
• Oil blending process management: manage the tank storage information, calculate the blending formula in real-time and online according to the blending order, obtain the optimized blending formula that meets the constraint conditions, and generate a blending report at the same time.
• Oil blending executive level: monitor the operating status of the equipment, verify the operability of the blending formula, and perform proportional online blending control of multiple components to complete the oil blending work.
• Basic data layer: Provides production dynamic data, equipment static data, oil testing data, etc. for the normal operation of upper-level modules.
• Oil blending process management: management of tank storage information, integration of crude oil test data in LIMS, integration of crude oil evaluation database, optimization of crude oil blending plan.
• Oil blending executive level: monitor the operating status of the equipment, verify the operability of the blending formula, and perform proportional online blending control of multiple components to complete the oil blending work.
• Basic data layer: Provides production dynamic data, equipment static data, oil testing data, etc. for the normal operation of upper-level modules.
BBP/BSP：According to component oil production capacity (yield, nature), through the establishment of a virtual blending model of the tank farm, the blending production situation in each blending cycle is predicted, and the adjustment is reasonably arranged under the constraints of tank storage, pumps, pipelines, etc. Coordinating the scheduling plan to maximize the output of high-grade products, while considering the residual wax oil balance of the refinery.
BOC/BRC：Perform model-based (blending rules) predictive control on the quality of refined oil for a certain blending batch, and through online feedback of refined oil quality, correct the drift of blending rules in a small range to ensure model accuracy and improve control accuracy , So as to implement precise seizure control on the properties of refined oil.
Belend Management：By comparing the blending plan with the actual results of blending, find out the cause of the deviation, and put forward suggestions to solve the problem, so that the entire system (hardware + software + people) can maintain a long-term, high-level operation.
