Flowcharts drawing

Dettiiled plant descriptions such as piping and instrumentation drawings and flowcharts... 

Often, it helps to draw a flowchart that organizes the steps necessary to analyze and solve a problem. A flowchart for this problem appears in the margin. 

In your notebook, draw a flowchart or concept web that illustrates the connections between the following words ... 

Given a process description, (a) draw and fully label a flowchart (b) choose a convenient basis of calculation (c) for a multiple-unit process, identify the subsystems for which balances might be written (d) perform the degree-of-freedom analysis for the overall system... 

When you are given process information like this and asked to determine something about the process, it is essential to organize the information in a way that is convenient for subsequent calculations. The best way to do this is to draw a flowchart of the process, using boxes or other symbols to represent process units (reactors, mixers, separation units, etc.) and lines with arrows to represent inputs and outputs. ... 

In professionally drawn flowcharts, special sj mbols are used to denote different types of process units such as distillation columns and heat exchangers. We will not generally use these symbols in this text, since our main purpose is to show you how to perfonn material and energy balance calculations. Simple boxes are perfectly adequate to represent process units on the flowcharts you draw for these calculations. 

The output gas is analyzed and is found to contain 1.5 mole% water. Draw and label a flowchart of the process, and calculate all unknown stream variables. 

Answers, p. 656) as directed, and draw flowcharts for the scaled processes. 

Choose a basis of calculation—an amount or flow rate of one of the feed or product streams—and then draw and label the flowchart. 

To perform a degree-of-freedom analysis, draw and completely label a flowchart, count the unknown variables on the chart, then count the independent tq xz.. on relating them, and subtract the second number from the first. The result is the number of degrees of freedom of the process, df (= unknowns rtindep eqns)- T ere are three possibilities ... 

Draw a flowchart and fill In all known variable values, including the basis of caicuia-tion. Then label unknown stream variables on the chart. 

As always, we begin by drawing and labeling the flowchart. For simplicity, we will treat each mixer-settler combination as a single extractor unit. 

When you draw and label the flowchart, be sure the outlet stream (the stack gas) includes (a) unreacted fuel unless you are told that all the fuel is consumed, (b) unreacted oxygen, (c) water and carbon dioxide, as well as carbon monoxide if the problem statement says any is present, and (d) nitrogen if the fuel is burned with air and not pure oxygen. 

Every chemical process analysis involves writing and solving material balances to account for all process species in feed and product streams. This chapter outlines and illustrates a systematic approach to material balance calculations. The procedure is to draw and label a flowchart, perform a degree-of-freedom analysis to verify that enough equations can be written to solve for all unknown process variables, and write and solve the equations. 

Draw and completely label a process flowchart. Include in the labeling the molar flow rates and SO2 mole fractions of the gas streams and the mass flow rates and SO2 mass fractions of the liquid streams. Show that the scrubber has zero degrees of freedom. 

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