[Q&A Question 187] 2018.07.11
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This post was last edited by Internet Invisible Man on 2018-7-11 09:06. [Q&A Question 187] 2018.07.11: Briefly describe the main factors that affect plate efficiency 1. Physical properties of the vapor-liquid phase of the mixture: mainly viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. 2. Structure of the distillation column: It mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and structure of the liquid dropping zone, as well as the structure, arrangement, and opening ratio of valves, sieve holes, or bubble caps. 3. Operating variables: mainly include gas velocity, reflux ratio, temperature, and pressure, etc. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below. The APP short-video skills competition has begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Physical properties of the vapor-liquid phase of the mixture: mainly include viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. Structure of the distillation column: It mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and structure of the liquid dropping zone, as well as the structure, arrangement, and open area percentage of valves, screen holes, or bubble caps. Operating variables: mainly include gas velocity, reflux ratio, temperature, and pressure.
The physical properties of the vapor-liquid phase of a mixture mainly include viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. The structure of a distillation column mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and design of the liquid dropping zone, as well as the structure, arrangement, and opening ratio of valves, sieve holes, or bubble caps. The operating variables mainly include gas velocity, reflux ratio, temperature, and pressure
1) Physical properties of the vapor-liquid phase of the mixture: mainly include viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. 2) Structure of the distillation column: It mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and structure of the liquid dropping zone, as well as the structure, arrangement, and open area percentage of valves, screen holes, or bubble caps. 3) Operating variables: mainly include gas velocity, reflux ratio, temperature, and pressure, etc.
The physical properties of the vapor-liquid phase of a mixture mainly include viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. The structure of a distillation column mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and design of the liquid dropping zone, as well as the structure, arrangement, and opening ratio of valves, sieve holes, or bubble caps. The operating variables mainly include gas velocity, reflux ratio, temperature, and pressure.
①The rate of mass exchange between the gas phase and the liquid phase； ②Degree of mixing between gas and liquid phases on the tray ； ③The amount of liquid droplets entrained by steam into the upper tray.
Pore volume fraction, tower pressure, feed composition
This post was last edited by 68ZCW on 2018-7-11 at 11:34. 1. Physical properties of the vapor-liquid phase of a mixture: These mainly include viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. 2. Structure of the distillation column: It mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and structure of the liquid dropping zone, as well as the structure, arrangement, and opening ratio of valves, sieve holes, or bubble caps. 3. Operating variables: mainly include gas velocity, reflux ratio, temperature, and pressure, etc.
1. Physical properties of the vapor-liquid phase of the mixture: mainly viscosity, relative volatility, diffusion coefficient, surface tension, and specific gravity. 2. Structure of the distillation column: It mainly includes the height of the outlet weir, the flow length of the liquid across the trays, the tray spacing, the size and structure of the liquid dropping zone, as well as the structure, arrangement, and opening ratio of valves, sieve holes, or bubble caps. 3. Operating variables: mainly include gas velocity, reflux ratio, temperature, and pressure, etc.
Gas-liquid mass transfer efficiency, gas-liquid entrainment, contact between gas and liquid
1 Physical properties of substances 2 Fluid mechanics states 2 Tray structure