How to find the xdmax of the top product composition

Calculation problem (distillation)-Baidu library

7 pages of publication date: 202 1 08 08.

The composition is as follows: xF=0.5077, yF=0.720 1. (1) Assume that the product composition at the top of the tower is xD=0.99 and the product composition at the bottom of the tower is xW=0.02. What is the minimum reflux ratio? How to ensure the purity of bottom products? ...

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Chapter 9 Exercise-Baidu Library

Publication date: May 28, 2020

1. The theoretical number of plates needed to obtain 60% of the top product composition;

2. Under the design conditions, if the number of trays is not limited, the highest concentration of products at the top of the tower can reach xDmax.

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How to find the xdmax of the top product composition

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1. Calculate the number of products at the top and bottom of the tower-there are customers on the road.

1. Total material balance of distillation column (2) Calculation of product quantity at the top and bottom of the tower. In general, xF, xD and xW are all specified by production conditions, and D and XW can be obtained when F is known.

2. Calculation of recovery and yield. Calculate the product quantity at the top and bottom of tower 3. What is the recovery rate? [New Curriculum Development] Answer-refers to the amount of a component recovered by rectification and its content in raw materials.

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The top of the tower is a full condenser, which means that Xd is equal to

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... class =' class1' > binary ideal mixture, reflux ratio R=3, and the composition of top product x- Baidu knows ... ...

3 answers: 2065438+May 2006 14

The best answer: According to the reflux ratio and Xd, the operating line of rectification section given in X2 equation can be written. Using this relationship, we can work out Y3=0.5775, and finally we should choose the third item.

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How to calculate the theoretical tray of distillation column by computer and the calculation software of distillation theoretical tray of Heishenglei -CS-blog ...

1. If the top condenser is a full condenser, then y 1= xD. According to the gas-liquid equilibrium relationship, it is composed of the liquid phase of the first theoretical tray calculated by y 1.

2. According to the operation equation of the rectification section, the composition of reflux liquid descending from the first theoretical tray is x 1, and the composition of vapor ascending from the second theoretical tray is calculated as y2. Then, the second layer is calculated from y2 by using the gas-liquid equilibrium relationship.

3. According to the operating line equation of the rectification section, calculate y3 from x2. According to the gas-liquid equilibrium relationship, x3 is calculated from y3.

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Material Balance of Distillation Column-Baidu Library

9 pages published: April 24, 2022

If the mass flow rate (kg/h) is used to represent the amount of bottom product W, the composition of feed liquid xF, top product xD and bottom product xW is also used. ...

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What are the two methods to estimate the quantity and composition of products at the top and bottom of distillation column? -Baidu knows.

1 Answer: 202165438+February 5th.

There are two methods to estimate the quantity and composition of products at the top and bottom of distillation column: setting the volume flow ratio and specifications of products at the top of two different specifications. ...

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The product composition at the top of the tower is known: xD in the case of full condenser and y0 in the case of partial condenser. It is found that there are two kinds when xD=y0. ...

The product composition at the top of the tower is known: xD in the case of full condenser and y0 in the case of partial condenser. When xD=y0, the operating line equations of the two cases are obtained. Related knowledge points: analysis and feedback collection ...

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Chemical Engineering —— Answers to Chapter VI (Distillation) Exercise-Baidu Library

Page 42 Date of publication: April 20, 2022

1. at 1 atm. At 84℃, the saturated vapor pressure of benzene PA*= 1 13.6(kpa), the saturated vapor pressure of toluene PB*=44.38(kpa), and the mixed solution of benzene and toluene reached.

2.0.9232.56 ideal mixture, in which a set of equilibrium data is xA=0.823, yA=0.923, and the average relative volatility is α = _ _ _ _ _ _.

3.2.578 In the t-x-y diagram of vapor-liquid equilibrium, the liquid line and vapor line divide the diagram into three areas: the area above the vapor line is called _ _ _ _ _.

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Principles of Chemical Engineering Ⅱ Calculation Problems

Trial calculation on March 2nd: (1) number of products at the top and bottom of the tower; (2) Operating reflux ratio; (3) Operating line equation of rectification section; (4) Gas and liquid phase velocity and operating line equations in stripping section; (5) gas phase and liquid phase in the middle part of the two feeding chambers ...

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Know the mole fraction at the top of the tower and how to calculate the product flow at the top of the tower-Q&A of 960 Chemical Network

Five days ago, I knew how to calculate the product flow at the top of the tower. The professional team and users of 960 Chemical Network will answer your questions. I have questions about how to calculate the product flow at the top of the tower.

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Review of rectification (20 10) Nanjing Liaohua

Seven days ago, when the product composition at the top of the tower xD=0.9 (mole fraction), the relative volatility of binary system α=3, the feed composition xF=0.5 (mole fraction), and the reflux ratio R= 1, it was found that (1) the liquid phase composition leaving the first plate was X 1. ...

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For binary continuous distillation column, the feed flow rate, composition, thermal state and evaporation at the bottom of the column are kept unchanged, and the recovery rate at the top of the column is improved. How does the composition xD at the top of the column and xW at the bottom of the column change? ()

Options: A.xD decreases and xW decreases; ; B.xD increases and xW decreases; ; C.xD decreases and xW increases; ; D.xD increases, xW increases.

Answer: xD decreases, xW decreases;

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If the number of trays is not limited under the design conditions, the highest content XD, max that the top product may reach.

202 1 February 1 day, as shown in the figure, a two-component mixed liquid containing 0.42 (molar fraction, the same below) of volatile components was continuously added to the top of the distillation column under the bubble point state, and the composition of the kettle liquid was maintained at 0.02. The relative volatility of the system is 2.5, but not at the top of the tower. ...

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Calculation method of distillation column -202 10322 152545. Docx- original document

On March 24th, 20265438+0, the suitable reflux ratio was taken as the operating reflux ratio, and the corresponding R value at the transition stage from sharp drop to slow drop of the curve was obtained, and the reflux liquid thermal condition was obtained from the top product composition XD=0.8047 and the top temperature [1]. ...

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Review of Chapter VI Rectification of Principles of Chemical Engineering. -Search the file network

It is required that the composition of the tower top is xD=0.9 (mole fraction), the reflux ratio is 5, indirect steam heating is adopted, and the tower top is fully condenser. Try to understand: (1) tower bottom composition; (2) The total condenser at the top of the tower condenses steam every hour; (3 ...

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Lecture 8 of Registered Chemical Industry 08-Renren Library Network

On February 28th, its quantity is equal to the product quantity at the top of the tower when there is a side line, and the reduced output is equal to the product quantity at the top of the tower when there is a side line. The recovery rate is reduced, the reflux ratio is unchanged, the ratio and reflux ratio are unchanged, N=, xDmax=?

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Introduction of super-classic distillation operation balance! The detailed explanation is here!

1. material balance of the whole tower (determination of product quantity at the top and bottom of the tower) material balance of the whole tower If the imaginary coil in Figure 10-20 is used for material balance of the whole tower, the light component material balance of the whole tower can be obtained as f = d+w.

2. Calculation of theoretical plate number (I) Calculation of material balance in rectification section ── Operating line equation of rectification section 1. The calculation of material balance in rectification section is the relationship between components of two vapor-liquid streams (two streams meet) between two adjacent plates.

3. There are several different definitions of the actual number and efficiency of distillation columns: total tower efficiency, tray efficiency and point efficiency.

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Indirect steam heating, reflux ratio R=3, composition of distillate xD=0.84 ... ....

65438+1October 65438+June 6, the product composition of the top and bottom of the tower, namely xD and xW, can be obtained through calculation.

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Distillation tower design-chemical engineering principle design-literature house

1. design task: production capacity (maximum output): 2000kg/h tower top product composition: 100% benzene.

2. Operating conditions: operating pressure: 10 1.3Kpa operating temperature: 80℃ feeding thermal state: bubble point feeding.

3. Equipment form: sieve plate distillation column, top full condenser, middle bubble point feeding, indirect steam heating at the bottom, and continuous rectification. (2) Design content 1. Overview: A sieve plate was designed this time.

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