Process Flow Diagrams PDF

PROCESS FLOW CHE 332 DIAGRAMS, P&ID  PROCESS FLOW DIAGRAM, DEFINED ¡ A process flow diagram ( PFD ) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of...

PROCESS FLOW CHE 332 DIAGRAMS, P&ID  PROCESS FLOW DIAGRAM, DEFINED ¡ A process flow diagram ( PFD ) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations. Another commonly used term for a PFD is a flowsheet.  PROCESS FLOW DIAGRAM EXAMPLES ¡ Single process unit ¡ The process flow diagram below depicts a single chemical engineering unit process known as an amine treating plant:  MULTIPLE PROCESS UNITS WITHIN AN INDUSTRIAL PLANT ¡ The process flow diagram below is an example of a schematic or block flow diagram and depicts the various unit processes within a typical oil refinery:  USES OF FLOW DIAGRAMS/FLOW CHARTS ¡ A flowchart is a type of diagram that represents workflow or process, showing the steps as boxes of various kinds, and their order by connecting them with arrows. ¡ Flowcharts are used in analyzing, designing, documenting or managing a process or program in various fields  DEFINITION ¡ Compressor is a mechanical device that takes in a medium and compresses it to a smaller volume. A mechanical or electrical drive is typically connected to a pump that is used to compress the medium. ¡ Pump refers to a mechanical apparatus using suction or pressure to raise or move liquids, compress gases, or force air into inflatable objects such as tires. The symbols for pumps may closely resemble those for compressors. ¡ Mixing is a gear that combine some materials or put them together to form one substance or mass. ¡ Mixing vessel is a container that is used to blend several components together.  DEFINITION ¡ Heat exchanger is an equipment used to transfer heat energy between two process flows. Heat exchangers transfer heat energy through conductive and convective heat transfer. ¡ Cooling towers transfer heat energy to the outside air through the principle of evaporation. ¡ Cooler is a device, container or room that cools air through the evaporation of water or keeps cool. ¡ Furnace means a tool for heating a continuous current of air by means of a fire contained within the apparatus and without mingling the fresh air with the products of combustion. ¡ Boiler is a closed vessel in which water or other fluid is heated. ¡ Tank is used to store process fluids of various types, under dif ferent process conditions.  DEFINITION ¡ Gate valve is a device used to control the flow of liquids and gases. ¡ Chec k valve , also known as one-way valve, is to prevent the line of medium back. ¡ Globe valve refers to a mechanism used to control or stop the flow of liquid or gas through a pipe. ¡ Ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. ¡ Butter fly valve is installed between two flanges using a separate set of bolts for each flange. ¡ Angle valve is oriented at a 90 deg angle of gate valve.  DEFINITION ¡ Process flow diagrams use special piping lines to represent how signals are transmitted between equipments. These symbols are used to identify how the instruments in the process connect to each other. And what type of signal is being used. (electrical, pneumatic, data, etc)  DEFINITION ¡ All lines are fine in relation to process piping lines. ¡ Major pipeline is for connection of the equipment in any position. ¡ Major Straight line is sued to connect the equipment in the same horizontal or Vertical position. ¡ Process connection help to create the process flow between equipments. Double click process connection to edit description. ¡ Process Flow Diagram Symbols - Instruments ¡ Process Flow Diagram use symbols and circles to represent each instrument and how they are inter-connected in the process. ¡ References: ¡ http://www.edrawsoft.com/pfdsymbols.php. Date retrieved: July 1, 2014