Petrochemical process control method and system

Abstract

The invention discloses a petrochemical engineering process control method and system, and the method comprises the steps: firstly obtaining market, environment and safety requirements through setting layout optimization, production optimization, process optimization, scheduling optimization and the like, determining the market prospects of different petroleum products according to the environment and safety requirements, and then optimizing a production line according to the market prospects. The process flow is refined, the product proportion is changed, the product benefit of a production line is improved, then the processes of raw material production, oil purchasing, selling, transportation, fund circulation, overhaul and the like are investigated and optimized according to market prospects, the yield of the whole process flow is increased, finally scheduling optimization is conducted, storage and transportation scheduling and process scheduling are optimized, and the purposes of optimizing the process flow, accelerating fund circulation and improving the production efficiency are achieved. The yield of the technological process is further improved, and the benefit of the technological process can be maximized.

Description

Technical Field

[0001] The invention relates to petrochemical industry, and in particular to a petrochemical process control method and system. Background Art

[0002] The petrochemical industry is referred to as petrochemicals, which generally refers to the chemical industry that uses oil and natural gas as raw materials. There are many process flows in petrochemicals, and the products are complex and diverse. The output of different types of products can be adjusted by changing the process flow. However, the oil production process does not act alone. The oil production process is only a part of the petrochemical process. The petrochemical process also involves two parts: pre-production and post-production. To control and plan the petrochemical process, we should start from the overall perspective, optimize the entire system, and maximize the benefits.

[0003] In the Chinese patent with publication number CN114114895A, an automatic control method and system applied to the field of petrochemical industry is mentioned, and the method includes: obtaining the current given variable and the real-time related variable; calculating the expected related variable according to the expected given variable and the current given variable; calculating the change time according to the real-time related variable and the expected related variable; judging whether the change time meets the given process speed; if not, calculating the provisional related variable according to the given process speed; calculating the provisional given variable according to the provisional related variable, and continuously changing the provisional given variable until the expected given variable is reached. This application can improve the problem that adjusting a certain parameter in the process control process causes the changes of each parameter to fail to match the current process, causing safety hazards in the process control process, and achieves the effect of adjusting a certain parameter in the process control process so that the changes of each parameter match the current process, and avoiding safety hazards in the process control process as much as possible.

[0004] The above application has defects during use. The automatic control method and system disclosed in the application are mainly suitable for parameter replacement in the petrochemical production process to reduce the probability of hidden dangers in the process control process. The scope of application is small. The petrochemical production process is complex and there are many influencing factors. Maximizing the output of petroleum products does not mean maximizing the benefits. The control method and system cannot achieve the maximization of the benefits of the petrochemical production process. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a petrochemical process control method and system, by which the efficiency of the petrochemical production process can be maximized.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a petrochemical process control method, the method comprising: S1. Data collection and processing: collecting process data and analyzing and processing the collected data; S2. Layout optimization, obtain and summarize market, environmental and safety requirements, and determine the overall plan for crude oil, raw materials and storage and transportation solutions; S3. Production optimization: according to the overall plan, optimize the production line, finely distribute the hydrogen flow and energy flow, and refine the process flow; S4. Process optimization, allocation and optimization of the operation between raw material production, oil purchase, sales, transportation, capital flow and maintenance; S5. Scheduling optimization: optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

[0007] In the method S2, the layout optimization obtains information including crude oil data, market information of crude oil and refined oil products, and production operation data. The crude oil data includes variety, properties, inventory, transportation and loading and unloading. The market information of crude oil and refined oil products includes price, consumption and market trend information. The production operation data includes production process, semi-finished product variety, quantity and quality.

[0008] In the method S3, optimizing the production line includes the following methods: S31. Arrange temperature, pressure, flow and time sensors on the production line equipment, and set an ultrasonic thickness gauge on the heating furnace to obtain crude oil pretreatment, atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, delayed coking, hydrocracking data and product refining data, and obtain heating furnace corrosion data; S32. The sensor and the ultrasonic thickness gauge are connected to the network to obtain production data and transmit it to the interface server, and then transmitted to the central server in the central control room through the interface server; S33. The central control room obtains data from the production line and determines the product composition, raw material usage, production time and production line status of the production line based on the data; S34. Production personnel adjust the production line based on production needs and production line data.

[0009] In the method S32, the sensor is set to use a process module in the production line as a partition, one interface server is set for each partition, and multiple interface servers are communicatively connected to the central server.

[0010] In the method S32, the central control room is provided with a data service layer network, the data service layer network is used to connect the WEB server and the network equipment, and the central server and the interface service are connected through the data service layer network communication.

[0011] The data service layer network is independently provided with an interface server.

[0012] The present invention provides a petrochemical process control system, comprising: The acquisition module is used to collect process data, provide data for the data processing module, and provide basic data support for the optimization control and safety assurance of the production process; The data processing module is used to analyze and process the data collected by the acquisition module, convert the collected raw data into valuable information, and provide support for the optimization control, production decision-making and fault diagnosis of the petrochemical process; The optimization module optimizes and adjusts the process based on the analysis of the collected data and the data processing module.

[0013] The optimization module includes: Layout optimization, which is used to obtain the overall planning of crude oil, raw materials and storage and transportation solutions by summarizing market, environmental and safety requirements; Production optimization, which is used to optimize production lines, finely distribute hydrogen and energy flows, and refine process flows according to the overall plan; Process optimization is used to coordinate and optimize the operations among raw material production, oil purchase, sales, transportation, capital flow and maintenance; Scheduling optimization is used to optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

[0014] The present invention adopts a petrochemical process control method and system designed by the above technical solution. The present invention sets the steps of layout optimization, production optimization, process optimization and scheduling optimization, firstly obtains the market, environment and safety requirements, determines the market prospects of different petroleum products according to the environment and safety requirements, then optimizes the production line according to the market prospects, refines the process flow to change the product proportion, and improves the product efficiency of the production line. Then, according to the market prospect survey, optimizes the processes of raw material production, oil purchase, sales, transportation, capital circulation and maintenance, and increases the rate of return of the entire process. Finally, scheduling optimization is carried out to optimize storage and transportation scheduling and process scheduling, so as to optimize the process flow, accelerate capital circulation, further improve the rate of return of the process flow, and maximize the rate of return of the process flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A block diagram showing the process control method of the present invention; Figure 2 A block diagram showing the process control system of the present invention. DETAILED DESCRIPTION

[0016] A petrochemical process control method and system of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0017] The present invention is a petrochemical process control method, see Figure 1 and Figure 2 , including the following methods: S1. Data collection and processing: collecting process data and analyzing and processing the collected data; S2. Layout optimization, obtain and summarize market, environmental and safety requirements, and determine the overall plan for crude oil, raw materials and storage and transportation solutions; S3. Production optimization: according to the overall plan, optimize the production line, finely distribute the hydrogen flow and energy flow, and refine the process flow; S4. Process optimization, allocation and optimization of the operation between raw material production, oil purchase, sales, transportation, capital flow and maintenance; S5. Scheduling optimization: optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

[0018] The overall process of petrochemical technology not only involves production, but also involves raw material planning before production, production line planning during production, and product planning after production. Therefore, to control the petrochemical process, it is necessary to first optimize the layout. By summarizing the market, environment and safety requirements, the crude oil and raw materials are determined. Different crude oils and raw materials have an important impact on the refining process, equipment, product distribution and product quality. Secondly, the production process is optimized. According to the current market situation of petrochemical products, the production process line is adjusted and optimized. According to the production data of the production line, the product types and production volume of petrochemical products are adjusted to maximize the economic benefits of petroleum products. After that, the overall process of production, oil purchase, sales, transportation, capital circulation and maintenance is optimized to reduce the capital circulation cycle of the petrochemical process and increase the overall process efficiency. Finally, the scheduling is optimized, and the storage and transportation scheduling of raw materials and products and the process scheduling are optimized again to achieve the optimization of the process flow.

[0019] In the above method S2 of the present invention, the layout optimization acquisition information includes crude oil data, market information of crude oil and refined oil, and production operation data, the crude oil data includes variety, nature, inventory, transportation and loading and unloading, the market information of crude oil and refined oil includes price, consumption and market trend information, and the production operation data includes production process, semi-finished product variety, quantity and quality.

[0020] In the above method S3 of the present invention, optimizing the production line includes the following methods: S31. Arrange temperature, pressure, flow and time sensors on the production line equipment, and set an ultrasonic thickness gauge on the heating furnace to obtain crude oil pretreatment, atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, delayed coking, hydrocracking data and product refining data, and obtain heating furnace corrosion data; S32. The sensor and the ultrasonic thickness gauge are connected to the network to obtain production data and transmit it to the interface server, and then transmitted to the central server in the central control room through the interface server; S33. The central control room obtains data from the production line and determines the product composition, raw material usage, production time and production line status of the production line based on the data; S34. Production personnel adjust the production line based on production needs and production line data.

[0021] The petrochemical process mainly includes the steps of crude oil pretreatment, atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, delayed coking, hydrocracking data and product refining data, among which, Crude oil pretreatment is to remove salt and water from crude oil to prevent salt and water from scaling inside the equipment, corroding the equipment and affecting the composition of the finished oil; Atmospheric and vacuum distillation includes atmospheric distillation and vacuum distillation, which is a physical change process. Crude oil is divided into oil products with different boiling point ranges according to its evaporation capacity inside the distillation tower. The products are used as raw materials for downstream production equipment, including kerosene, diesel, etc. Catalytic cracking mainly includes catalytic cracking of crude oil, catalyst regeneration and product separation. The main chemical reactions in the catalytic cracking process are cracking reaction, isomerization reaction, hydrogen transfer reaction and aromatization reaction. The products can be obtained by fractionation to obtain liquefied gas, gasoline, diesel and heavy distillate oil. Catalytic reforming refers to the process of converting light gasoline obtained by atmospheric distillation into reformed gasoline with high aromatic content under the action of catalyst and hydrogen. Catalytic reforming has three functions in oil refining: first, it converts straight-run gasoline with very low octane number into high-octane gasoline with number 80-90; second, it produces a large amount of benzene, toluene and xylene; third, it produces a large amount of cheap hydrogen; Delayed coking refers to the process of deep cracking of raw materials under a longer reaction time to produce solid petroleum coke. Gas and liquid products are obtained at the same time. By changing the raw materials and operating environment conditions, the ratio of gasoline, diesel, cracked raw oil and coke can be adjusted; Hydrocracking refers to a reaction under high pressure and in the presence of hydrogen, which requires the use of a catalyst to convert heavy crude oil into gasoline, kerosene, diesel and lubricating oil. The main products produced are high-quality light oil products, especially high-quality aviation kerosene and low-freezing point diesel; Product refining is the terminal process of the oil production process. The oil products produced by the oil refining process generally cannot be directly used as commodities. In order to meet the requirements of commodity sales, in addition to blending and adding additives, they also need to be further refined to remove impurities and improve performance to meet actual use requirements.

[0022] Multiple steps such as atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, and delayed coking all require heating of raw materials. The raw materials may cause corrosion to the heating furnace during the heating process. Therefore, an ultrasonic thickness gauge is set up to perform ultrasonic detection on the heating furnace and obtain the thickness data of the heating furnace wall in real time. By comparing the heating furnace wall data with the original design data, the thickness of the corrosion of the heating furnace wall can be obtained, and the thickness of the scaling layer on the inner wall of the heating furnace can also be obtained, which is convenient for production personnel to inspect and repair the heating furnace in time and make the heating furnace operate in a better state.

[0023] In the above method S32 of the present invention, the sensor is set to use one process module in the production line as a partition, one interface server is set for each partition, and multiple interface servers are communicatively connected with the central server.

[0024] In the above method S32 of the present invention, the central control room is provided with a data service layer network, the data service layer network is used to connect the WEB server and the network equipment, and the central server and the interface service are connected through the data service layer network communication.

[0025] The data service layer network set up in the central control room can effectively ensure the security of the control system and can be used as a protection layer. The central control room can display the associated data of each sensor and interface server, operation management data, production management data, scheduling commands and factory information, etc.

[0026] The data service layer network has a separate interface server that is responsible for transmitting data to the factory management network. At the same time, a hard firewall is set between the data service layer network and the controller. Optical fiber is used to connect the data server and the controller. The hard firewall is hardware-based and is set up independently. The maximum number of concurrent connections is greater than 100,000, and the data throughput is greater than 100Mbps. An antivirus server is set up at the data service layer for anti-virus protection. The central control room can store process data, operation and production management software data.

[0027] The present invention provides a petrochemical process control system, comprising: The acquisition module is used to collect process data, provide data for the data processing module, and provide basic data support for the optimization control and safety assurance of the production process; The data processing module is used to analyze and process the data collected by the acquisition module, convert the collected raw data into valuable information, and provide support for the optimization control, production decision-making and fault diagnosis of the petrochemical process; The optimization module optimizes and adjusts the process based on the analysis of the collected data and the data processing module.

[0028] The information collected by the collection module of the present invention includes three parts: First, market research before production to obtain complete, real-time, and high-value market information, including crude oil data, market information data on crude oil and products, and production process operation data; The second is the information collection of the production process. By installing sensors on each production device of the production process line, the production environment data, product types and output of the process line can be obtained through the sensors; The third is the collection of product sales information after production. The petrochemical process is complex and there are many products. The storage methods, sales and transportation methods, market prices, and supply and demand relationships of each product are all different. It is necessary to conduct detailed research on market demand and supply prices to ensure maximum product sales revenue.

[0029] The optimization module of the present invention comprises: Layout optimization, which is used to obtain the overall planning of crude oil, raw materials and storage and transportation solutions by summarizing market, environmental and safety requirements; Production optimization, which is used to optimize production lines, finely distribute hydrogen and energy flows, and refine process flows according to the overall plan; Process optimization is used to coordinate and optimize the operations among raw material production, oil purchase, sales, transportation, capital flow and maintenance; Scheduling optimization is used to optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

[0030] The present invention optimizes the raw material, production and sales processes based on the acquired raw material, production and market data and the storage and transportation scheduling of raw materials and products, controls and shortens the process time, reduces the capital circulation time and increases the process benefits.

Claims

1. A petrochemical process control method, characterized in that The method comprises: S1. Data collection and processing: collecting process data and analyzing and processing the collected data; S2. Layout optimization, obtain and summarize market, environmental and safety requirements, and determine the overall plan for crude oil, raw materials and storage and transportation solutions; S3. Production optimization: according to the overall plan, optimize the production line, finely distribute the hydrogen flow and energy flow, and refine the process flow; S4. Process optimization, allocation and optimization of the operation between raw material production, oil purchase, sales, transportation, capital flow and maintenance; S5. Scheduling optimization: optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

2. A petrochemical process control method according to claim 1, characterized in that In the method S2, the layout optimization obtains information including crude oil data, market information of crude oil and refined oil products, and production operation data. The crude oil data includes variety, properties, inventory, transportation and loading and unloading. The market information of crude oil and refined oil products includes price, consumption and market trend information. The production operation data includes production process, semi-finished product variety, quantity and quality.

3. A petrochemical process control method according to claim 1, characterized in that In the method S3, optimizing the production line includes the following methods: S31. Arrange temperature, pressure, flow and time sensors on the production line equipment, and set an ultrasonic thickness gauge on the heating furnace to obtain crude oil pretreatment, atmospheric and vacuum distillation, catalytic cracking, catalytic reforming, delayed coking, hydrocracking data and product refining data, and obtain heating furnace corrosion data; S32. The sensor and the ultrasonic thickness gauge are connected to the network to obtain production data and transmit it to the interface server, and then transmitted to the central server in the central control room through the interface server; S33. The central control room obtains data from the production line and determines the product composition, raw material usage, production time and production line status of the production line based on the data; S34. Production personnel adjust the production line based on production needs and production line data.

4. A petrochemical process control method according to claim 3, characterized in that In the method S32, the sensor is set to use a process module in the production line as a partition, one interface server is set for each partition, and multiple interface servers are communicatively connected to the central server.

5. A petrochemical process control method according to claim 3, characterized in that In the method S32, the central control room is provided with a data service layer network, the data service layer network is used to connect the WEB server and the network equipment, and the central server and the interface service are connected through the data service layer network communication.

6. A petrochemical process control method according to claim 5, characterized in that The data service layer network is independently provided with an interface server.

7. A petrochemical process control system, characterized in that include: The acquisition module is used to collect process data, provide data for the data processing module, and provide basic data support for the optimization control and safety assurance of the production process; The data processing module is used to analyze and process the data collected by the acquisition module, convert the collected raw data into valuable information, and provide support for the optimization control, production decision-making and fault diagnosis of the petrochemical process; The optimization module optimizes and adjusts the process based on the analysis of the collected data and the data processing module.

8. A petrochemical process control system according to Quluqiao 7, characterized in that The optimization module includes: Layout optimization, which is used to obtain the overall planning of crude oil, raw materials and storage and transportation solutions by summarizing market, environmental and safety requirements; Production optimization, which is used to optimize production lines, finely distribute hydrogen and energy flows, and refine process flows according to the overall plan; Process optimization is used to coordinate and optimize the operations among raw material production, oil purchase, sales, transportation, capital flow and maintenance; Scheduling optimization is used to optimize storage and transportation scheduling and process scheduling to achieve optimal process flow.

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