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How exactly should one design a graduation project? Help please

2009-04-17View Original

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Hello everyone. I am a college student about to graduate, majoring in process equipment. My design project was a methanol washing tower (a tower with a single overflow plug). Our teacher asked us to find information on our own, translate it to write a manual, and also perform calculations. I don’t quite understand how to carry out the calculations – I’m not sure what methods to use. The teacher provided a few parameters: diameter of 800 mm, maximum operating pressure of 0.6 Mb, maximum operating temperature of 50 degrees, basic wind pressure of 450 Mb, 38 layers of trays, seismic resistance rating of 7 degrees, and soil category of type 2. That’s all. I would like to ask everyone here where I should start with my calculations and how to do them. Please explain in detail. Thank you in advance. My QQ number is 527156470
Reply #22009-04-17
This is a absorption device. Follow the third section of Chapter 1 in \"Principles of Chemical Engineering\", which deals with the calculation of absorption towers (I have the edition by Yao Yuying from Tianjin University), and proceed step by step. It is mainly a calculation of gas-liquid equilibrium. Previously, we would be given a processing capacity and have to calculate the size of the tower ourselves, etc. It seems like you two have it reversed. :The basic wind pressure is 450 Mb; the tower has 38 levels. The seismic design intensity is 7 degrees, and the soil category at the site is category 2. These factors probably have little relevance to the chemical industry – they may be relevant to wall thickness, but this falls outside the scope of design in the field of chemical processes or engineering; it belongs to the domain of equipment design (or mechanical manufacturing). Seismic conditions and soil categories are even less relevant to us, as these aspects are related to the foundation design of tower equipment and fall under the purview of structural engineering. I remember we had a course design like this back then. I guess your course design guidebook also contains specific methods.
Reply #32009-04-17
Thank you, I appreciate your answer. Our teacher said that it needs to be calculated from several aspects: 1. the wall thickness of the tower; 2. the calculation and verification of the loads on the tower equipment; 3. the design calculation and verification of the skirt; 4. the design of the foundation ring and anchor bolts; 5. the verification of the welds connecting the skirt to the tower; 6. reinforcement for the openings. What books do I need to read? Thank you
Reply #42009-04-17
For the graduation project, having access to \"The Complete Book of Chemical Engineering Equipment Design – Tower Equipment\" and \"Process Calculations for Towers\" is sufficient to get the job done.
Reply #52009-04-17
The graduation project for the Process Equipment major mainly involves structural design rather than process design. For the equipment design of towers, refer to JB/T4710 \"Steel Tower Vessels\" and HG20652 \"Technical Specifications for Tower Design\".
Reply #62009-04-17
It seems from what your teacher said that process calculations aren’t required; only equipment calculations are necessary. Then, the arrangement of the trays inside might not need to take into account process requirements; a uniform arrangement will suffice. The several aspects mentioned by the teacher are basically in line with the tower standards.
Reply #72009-04-19
Refer to GB150 and JB4710; following those guidelines will be fine
Reply #82009-04-27
GB150 and JB4710 are still far from sufficient; many of the components in the tower require further research – one just needs to find the relevant standards and follow them, and over time understanding will come.
Reply #92009-05-02
1 Wall thickness of the tower body; 2 Calculation and verification of loads on tower equipment; 3 Design calculation and verification of the base; 4 Design of the foundation ring and anchor bolts; 5 Verification of the welds joining the base to the tower body; 6 Reinforcement through opening cuts. For the design calculations related to these aspects, it is necessary to refer to the book \"Chemical Engineering Equipment\", and GB150 must also be consulted. I have it here; I’ll upload it for you
Reply #102009-05-02
First of all, it is necessary to refer to the book \"Chemical Engineering Equipment\", and secondly, some national standards such as GB150 need to be consulted.
Reply #112009-05-02
Just find the two books, GB150 and JB4710
Reply #122009-05-04
You can refer to the suggestions from those above. The book \"Comprehensive Book on Chemical Equipment Design – Tower Equipment\" is the best choice. 1. For material selection and strength verification, refer to GB150 and JB4710 (which contain example problems). 2. For structural design, refer to HG20583 \"Code for Structural Design of Steel Chemical Vessels\" and HG20652 \"Technical Specifications for Tower Design\"
Reply #132009-05-04
To complete a graduation project successfully, one should ask the teacher more questions and consult more materials. It is recommended to study standards such as GB150 and JB4710 carefully.
Reply #142009-05-08
You can calculate it using GB150 – the calculation methods are provided there; then you just need to create a diagram and write down the design specifications. That’s what we used to do as well

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