Lao K talks every week - talk about the petrochemical design industry. The 14th post illustrates the content and procedures of process professional design.
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This post was last edited by henglinkou on 2020-9-12 09:13. Old K said every week - Talking about those things in the petrochemical design industry. The 14th post illustrates the process professional design content and procedures. The process professional carries out design. There are two situations where the process package is provided by the process contractor and the process package is not provided by the process contractor. The source of design technology without the process package can be divided into two situations: pilot test data and process package data of different scales. When a process package is provided by a process contractor, the process package supplier needs to communicate with the engineering designer when designing the process package. After the process package is reviewed, the engineering design can be carried out directly based on the process package. When there is no process package supplier to provide the process package, the engineering designer needs to design the process package, and then start the engineering design after the design and review of the process package are completed. The design content of process specialty is divided into four categories, namely, design finished product, calculation book, design conditions and professional management documents. The designed finished products mainly include process flow diagram (PFD), material balance sheet, pipeline instrument flow diagram (PID), pipeline table, equipment data table, safety valve data table, equipment table, boundary condition table, etc. ； Calculation books mainly include process simulation, equipment calculation books, pipeline calculation books, etc. ； The design conditions are the conditions provided by the craft majors to each major. ； Professional management documents mainly include professional regulations, professional plans, etc. From the process package design stage to the basic engineering design stage to the detailed design stage, the design documents of the process specialty are gradually deepened step by step. For example, PID, according to international practice, is generally divided into 7 design versions. For an experienced process engineer, he can roughly describe the design content and procedures of this major, but it is indeed not easy to express it clearly. I have expressed the design content and procedures of the process major in the form of a network diagram, which is simple, clear, and easy to use. See the figure below for details.: Lao K talks every week - talk about the petrochemical design industry. Please see the link below for the previous post.: Post 1 The development history of China’s survey and design industry https://bbs.hcbbs.com/thread-3031149-1-1.html Post 2 * * Management of the survey and design industry https://bbs.hcbbs.com/thread-3036417-1-1.html Post 3: Development of Drawing Technology in Design Institutes https://bbs.hcbbs.com/thread-3039960-1-1.html Post 4: The evolution of professional division of labor in petrochemical design institutes https://bbs.hcbbs.com/thread-3045261-1-1.html Post 5: Organizational structure of petrochemical engineering companies https://bbs.hcbbs.com/thread-3050591-1-1.html Post 6 Design Management Contract Management https://bbs.hcbbs.com/thread-3054762-1-1.html Post 7 Design Management Basic Data Management of Design https://bbs.hcbbs.com/thread-3058184-1-1.html Post 8 Design Management: Design Quality Management https://bbs.hcbbs.com/thread-3061718-1-1.html Post 9 Design Management: Design Progress Management https://bbs.hcbbs.com/thread-3062161-1-1.html Post 10 Design Management: Design Document Management https://bbs.hcbbs.com/thread-3069580-1-1.html Post 11 Design Management Meeting Management https://bbs.hcbbs.com/thread-3073327-1-1.html Post 12 Design Management Bonus Distribution Management https://bbs.hcbbs.com/thread-3077492-1-1.html Article 13 Petrochemical Project Construction Procedures https://bbs.hcbbs.com/thread-3082708-1-1.html
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In the design of chemical engineering projects, the process major is the core. The initiation of collaboration conditions and coordination among various majors are initiated from the process room, just like the human brain, from which all instructions are issued. Therefore, most project managers or hospital leaders have a background in craft laboratories.
When I was teaching college students a few days ago, I mentioned that design must be realistic, rather than theory for the sake of theory.
The main work content of the process system major in the engineering design stage 1.1.1 Design the pipeline instrument flow diagram (referred to as PI diagram or MID) of the chemical process production device based on the process flow diagram (PF diagram or PFD), process control diagram (PC diagram or PCD), material balance sheet, and working conditions and instructions required for process operations to meet the operation and safety needs of normal production, start-up and shutdown, and accident situations. 1.1.2 Work with the automatic control major to evaluate the PI diagram of the finalized pump, and work with the pump major to evaluate the manufacturer's pump process characteristics data. For the design of unstructured pumps, the pump professional proposes flow charts, operating requirements and instructions, etc., and the automatic control professional collaborates with the process system professional to complete the PI diagram (including the PI diagram of the main pipe part of the centralized oil system and sealed gas (liquid) system of multiple units, excluding the PI diagram of the oil system and sealed gas (liquid) system within the unit). 1.1.3 Responsible for the hydraulic calculation of pipelines in the chemical process production unit and the determination of valve categories. 1.1.4 Responsible for calculating and selecting all special pipe fittings and system components such as safety valves, bursting discs, restriction orifice plates, small mufflers, traps, etc. in the PI diagram, and responsible for proposing data sheets for these components. 1.1.5 Responsible for proposing the pressure difference and related data tables of the control valve and flow meter orifice plate. 1.1.6 Participate in technical evaluations of inquiries and quotations related to process system majors. 1.1.7 Responsible for determining the design pressure and connection requirements for all indirect fire heating equipment in the process production unit. 1.1.8 Responsible for proposing the calculation of equipment elevation and pump NPSH (net positive suction head) related to the professional calculation of the process system and determining the pressure difference requirements of the machine and pump. 1.1.9 Determine the insulation type of equipment and pipelines according to the regulations on insulation and painting design provided by the pipeline material professional. 1.1.10 Responsible for the noise control design of pipelines, valves, etc. Select and calculate reasonable medium flow rates to reduce and eliminate noise in pipelines and valves ； Eliminate venting noise and take sound insulation measures when general measures cannot reduce or eliminate it. 1.1.11 The design of the safety system responsible for the normal and safe operation of the devices within the device. 1.1.12 Participate in technical and contract negotiations at all stages of the introduction of technology related to this major, and participate in data research. 1.1.13 Estimate and control the labor time consumption of this profession. 1.1.14 Prepare engineering design regulations and completion reports for this major. 1.1.15 For equipment, pumps, etc. in the common material generation and distribution system process in the device that the chemical process professional is not responsible for designing, the process system professional should propose process conditions. Its job responsibilities, work content, and relationship with other majors are the same as those of the chemical engineering major.
Scope of Responsibilities of the Process System Major 1.2.1 The design conditions and PI diagrams for production water supply and drainage in chemical process equipment are the responsibility of the Process System Major. The process system major proposes the boundary conditions for production water supply and drainage to the water supply and drainage major. 1.2.2 The process system major is responsible for proposing the steam and condensate boundary conditions in the chemical process equipment, and the thermal engineering major is responsible for the plant-wide steam balance, steam condensate recovery and process condensate recovery design. 1.2.3 The process system major is responsible for proposing the boundary conditions for processes, auxiliary materials and public materials within the chemical process device. The engineering design of process, auxiliary materials and public material pipelines outside the chemical process device is the responsibility of the pipeline design major. 1.2.4 In accordance with the requirements of the chemical process major on process operation principles, according to the process control chart (PCD) and with the cooperation of the automatic control major, the instrument symbols are represented on the PI diagram. In addition, the process system major should also supplement detection, display, control and alarm systems. 1.2.4.1 According to the calculation of the pressure drop of the pipeline system and the determination of the equipment design pressure, relevant control, detection points and alarm systems should be added to maintain the safe pressure of the system. 1.2.4.2 Depending on the type of pump or compressor and the calculation of the pressure difference between the pump and compressor, certain detection, display and control points should be added if necessary. 1.2.4.3 In public material systems, such as steam, nitrogen, compressed air, water and other main pipes, necessary control, measuring points, measuring instruments and alarm systems should be set up. 1.2.4.4 For some public material auxiliary equipment (such as safety nitrogen storage tanks in the device, etc.), add necessary control, detection points and alarm systems. 1.2.4.5 According to the written opinions of the chemical process professional operation department, relevant instruments will be added. 1.2.4.6 When it is necessary to adjust control points or detection points after safety analysis by the process system professional, consultation should be made with the chemical process professional and the automatic control professional. 1.2.5 Due to different professional settings, adjustments to the above scope of responsibilities must be approved by the unit leader and corresponding regulations must be formulated.
The poster is very professional. After reading the theme of the series, he supports the poster to continue making it into a series. Haichuan compiled it into an e-book. How great would that be?
This is a good idea, and this series of seniors is very instructive. I will help seniors handle this matter when I have time!