Relationship between BFD PFD P&ID and HMB.

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Relationship Between BFD, PFD, PID HMB

• GET Training
• by
• Sridhar Dhanapal

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Contents

1. Introduction
2. Block Flow Diagram (BFD)
3. Process Flow Diagram (PFD)
4. Piping and Instrumentation Diagram (PID)
5. Heat and Mass Balance

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1. Introduction

• In this training, GETs will be able to acquire
  basic knowledge of reading, interpreting and
  conceptual understanding of the following
• Block Flow Diagram (BFD)
• A drawing of a chemical processes used to
  simplify and understand the basic structure of a
  system
• Process Flow Diagram (PFD)
• A diagram commonly used in chemical and process
  engineering to indicate the general flow of plant
  processes and equipment
• Piping Instrumentation Diagram (PID)
• A detailed diagram in the process industry which
  shows the piping and process equipment together
  with the instrumentation and control devices
• Heat and Mass Balance
• Represents every process stream on the
  corresponding PFD in terms of the process
  conditions

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2. Block Flow Diagram (BFD)
Block Flow Diagram (BFD)
Simple flow sheet to identify only the feed and product streams Input-output diagrams (not detailed) helpful in early stages of process development, complete process understanding of the Unit or Industry Flow of raw materials and products Processes are described as basic functional elements such as reaction and separation sections To identify recycle streams and additional unit operations to achieve the desired operating conditions
Block Flow Diagram for the Production of Benzene
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2. Block Flow Diagram (BFD)
Example 2 On going project
Example 1 Refinery process
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3. Process Flow Diagram (PFD)
Process Flow Diagram (PFD)
Flow rate streams (Continuous or batch) Composition streams Operating conditions (Pressure, Temperature, Concentration etc.) Heat added or removed Flows of utilities such as stream, cooling water, brine, hot oil, chilled water, thermal fluids etc. Major equipment symbols (Equipment Specifications, Identification)
Typical PFD for Sour Water Stripper Column
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3. Process Flow Diagram (PFD)

• Process Unit Symbols

Heat exchanger
Water cooler
Steam heater
Cooling coil
Centrifugal pump
Heater coil
Turbine type compressor
Pressure gauge
Stripper
Absorber
Distillation column
Liquid mixer
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3. Process Flow Diagram (PFD)
Reaction chamber
Horizontal tank or cylinder
Boiler
Centrifuge
Gate Valve
Globe Valve
Check Valve
Butterfly Valve
Ball Valve
Needle Valve
Angle Valve
3-way Valve
Relief Valve
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3. Process Flow Diagram (PFD)

• Example

Equipment numbers and details
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PFD Example
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4. Piping and Instrumentation Diagram (PID)
Piping and Instrumentation Diagram (PID)
Also known as Process Instrumentation Diagram Detailed graphical representation of a process including the hardware and software (i.e. piping, equipment, and instrumentation)
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• Example

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• Basic Loop

Example
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P ID of this equipment is illustrated in Next
slide
EXAMPLE
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EXAMPLE
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5. Heat and Mass balance

1. Normal operating temperature and pressure.
2. Normal volumetric or mass flow rate. If multiple
   phases are involved, flow rate for each phase
   should be reported.
3. Density at normal operating temperature and
   pressure conditions. If the stream has multiple
   phases, density for every phase should be
   reported along with the overall density.
4. Viscosity for each phase in the stream should be
   separately reported.
5. If gases are present, vapor fraction should be
   reported.
6. Specific heat ratio Cp/Cv and compressibility
   factor should be reported for gaseous phase.
7. Molecular weight for each should be reported
   separately.
8. Enthalpy flow for each stream is also reported
   sometimes in KJ/hr.

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• THANK YOU

• Address
• Elixir Engineering
• Plot no.255, PO Box 1427,Bait Al Sawari Tower,
  3rd FloorUnit no.33, Ghala Area,P.C 130,
  Muscat, Oman

Get In Touch Tel [phone] rajasekar.pm_at_elixir
engineering.om info_at_elixirengineering.om