{"id":53,"date":"2020-07-02T14:22:52","date_gmt":"2020-07-02T14:22:52","guid":{"rendered":"https:\/\/libraryresources.nse.org.ng\/chbe220\/chapter\/block-flow-diagrams\/"},"modified":"2026-03-16T13:48:34","modified_gmt":"2026-03-16T13:48:34","slug":"block-flow-diagrams","status":"publish","type":"chapter","link":"https:\/\/libraryresources.nse.org.ng\/chbe220\/chapter\/block-flow-diagrams\/","title":{"raw":"Block Flow Diagrams","rendered":"Block Flow Diagrams"},"content":{"raw":"
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Learning Objectives<\/p>\n\n<\/header>\n

\n\nBy the end of this section, you should be able to:\n\nConstruct<\/strong> block flow diagrams (BFDs) for chemical processes\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Block Flow Diagrams<\/h2>\nWe typically break down chemical and biological processes (or any other process) into units representing equipment. These are called unit operations <\/strong> and are drawn as circles or squares:\n\n\"\"\n\nLines with arrows represent the flow of materials in streams to and from units. These lines have only 1 arrowhead:\n\n\"\"\n\nMaterials in each stream are labeled above or beside the stream:\n\n\"\"\n\n<\/div>\n<\/div>\n<\/div>\n
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Exercise: BFD Components<\/p>\n\n<\/header>\n

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\n\nWhat are some errors in the following flowsheet? How would you change the flowsheet to address these errors?\n\n\"\"\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\nSolution<\/strong>\n\n\"\"\n\nWe can correct the BFD to following:\n\n\"\"\n\n \n\n<\/div>\n \n\n<\/div>\n<\/div>\n<\/div>","rendered":"
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Learning Objectives<\/p>\n<\/header>\n

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By the end of this section, you should be able to:<\/p>\n

Construct<\/strong> block flow diagrams (BFDs) for chemical processes<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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<\/div>\n
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Block Flow Diagrams<\/h2>\n

We typically break down chemical and biological processes (or any other process) into units representing equipment. These are called unit operations <\/strong> and are drawn as circles or squares:<\/p>\n

\"\"<\/p>\n

Lines with arrows represent the flow of materials in streams to and from units. These lines have only 1 arrowhead:<\/p>\n

\"\"<\/p>\n

Materials in each stream are labeled above or beside the stream:<\/p>\n

\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Exercise: BFD Components<\/p>\n<\/header>\n

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What are some errors in the following flowsheet? How would you change the flowsheet to address these errors?<\/p>\n

\"\"<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Solution<\/strong><\/p>\n

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We can correct the BFD to following:<\/p>\n

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