BFD - Block Flow Diagram

A Block Flow Diagram is a schematic illustration of a major process showing unit operations as rectangles connected by flow streams with arrows indicating direction of flow.

Block ID	Unit Operation	Description	Input Streams	Output Streams	Notes
B-1	Mixer	Combines multiple input streams	Stream 1, Stream 2	Stream 3	Horizontal orientation
B-2	Reactor	Chemical reaction unit	Stream 3	Stream 4	Temperature controlled
B-3	Separator	Separates mixture components	Stream 4	Stream 5, Stream 6	Vertical orientation
B-4	Heat Exchanger	Transfers heat between streams	Stream 5	Stream 7	Downstream operation
B-5	Distillation Column	Separates by boiling point	Stream 7	Stream 8, Stream 9	Final purification