Warm greetings in the 3rd post š¤©! Our journey continuous in the category of Process Engineering General Info. It is time to learn about what are Process Engineering Project š, its detailsš, stages š§ and etch. Here we go š ,
Nature of Design š¤
Design is a creative activity, and as such can be one of the most rewarding and satisfying activities undertaken by an engineer. It is the putting things together of ideas to achieve a desired purpose. The design does not exist at the commencement of the project. The designer starts with a specific objective in mind, a need, and by developing and evaluating possible designs, arrives at what he considers the best way of achieving that objective; for example, for the chemical engineer, a new chemical product or a stage in the design of a production process. To achieve the desired design, it depends on some features such as nature of the constraints. We can divide these features in some groups such as external and internal.
External constraints: Economic constraints, physical laws, some codes and standards an etch.
Internal constraints: Materials, choice of process conditions, methods, time and etch.
Economic considerations are obviously a major constraint on any engineering design: plants must make a profit.
Time will also be a constraint. The time available for completion of a design will usually limit the number of alternative designs that can be considered.
Development of Design Stages
The stages in the development of a design, from the initial identification of the objective to the final design will be discussed in the following sections.
Design Objective: The designer is creating a design for an article, or a manufacturing process, to fulfill a particular need. In the design of a chemical process, the need is the public need for the product, the commercial opportunity, as foreseen by the sales and marketing organisation.
Data collection: To proceed with a design, the designer must ļ¬rst assemble all the relevant facts and data required. For process design this will include information on possible processes, equipment performance, and physical property data. Most organisations will have design manuals covering preferred methods and data for the more frequently used, routine, design procedures.
Generation of possible design solutions: The creative part of the design process is the generation of possible solutions to the problem (ways of meeting the objective) for analysis, evaluation and selection. In this activity the designer will largely rely on previous experience, his own and that of others. The experienced engineer will wisely prefer the tried and tested methods, rather than possibly more exciting but untried novel designs.
Selection: The designer starts with the set of all possible solutions bounded by the external constraints, and by a process of progressive evaluation and selection, narrows down the range of candidates to find the ābestā design for the purpose. The selection process can be considered to go through the following stages:
Possible designs (credible) within the external constraints.
Plausible designs (feasible) within the internal constraints. Best design (optimum) judged the best solution to the problem. To select the best design from the probable designs, detailed design work and costing will usually be necessary.
Chemical engineering projects can be divided into three types, depending on the novelty involved:
1. Modiļ¬cations, and additions, to existing plant; usually carried out by the plant design group.
2. New production capacity to meet growing sales demand, and the sale of established processes by contractors. Repetition of existing designs, with only minor design changes.
3. New processes, developed from laboratory research, through pilot plant (yesterday we have already talked), to a commercial process. Even here, most of the unit operations and process equipment will use established designs.
The Anatomy of Chemical Manufacturing Process
For further information, you can check this file,
Chemical Engineering Project š
The design work required in the engineering of a chemical manufacturing process can be divided into two broad phases.
Phase 1. Process design, which covers the steps from the initial selection of the process to be used, through to the issuing of the process flow-sheets; and includes the selections, specification and chemical engineering design of equipment. In a typical organisation, this phase is the responsibility of the Process Design Group, and the work will be mainly done by chemical engineers. The process design group may also be responsible for the preparation of the piping and instrumentation diagrams.
Phase 2. The detailed mechanical design of equipment; the structural, civil and electrical design; and the specification and design of the ancillary services. These activities will be the responsibility of specialist design groups, having expertise in the whole range of engineering disciplines.
Project Documentationš
The project documentation will include:
General correspondence within the design group and with: government departments equipment vendors site personnel the client
Calculation sheets design calculations costing computer print-out
Drawings flow-sheets piping and instrumentation diagrams layout diagrams plot/site plans equipment details piping diagrams architectural drawings design sketches
Specification sheets for equipment, such as: heat exchange pumps
Purchase orders quotations invoices
References
Coulson & Richardsonās -Chemical Engineering Design Volume 6
McGraw Hill- Chemical Process and Design Handbook
Robin Smith- Chemical Process Design and Integration
Shuchen B Thakore- Introduction to Process Engineering and Design
šYou can get deep insight about Process/Chemical Engineering from these sourcesš:
http://chemicalengineeringguy.com/- suggests a wide range of courses in Chemical engineering (you can find free courses on topic of Aspen HYSYS, Aspen Plus)
https://www.youtube.com/user/LearnEngineeringTeam- suggests working principles of every engineered devices, equipment and etch.
https://www.youtube.com/channel/UCR0EfsRZIwA5TVDaQbTqwEQ- suggests great information about pumps, compressors with animation.
šToday we have already learnt and talked about nature of design, project documentation, chemical process design steps, anatomy of chemical manufacturing processes, now time to say goodbyešš» until tomorrow and Stay tunedāØ!
š¤If you need one of those books or links, you can contact me via my email or LinkedIn profile.
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