SlideShare uma empresa Scribd logo
1 de 23
Baixar para ler offline
INTRODUCTION
Definition:
 Heat exchangers are devices that transfer or exchange
heat from one media to another. It is used either for
cooling or for heating purpose.
 The mediums flowing inside the heat exchanger may
be gas or liquid depending upon the service
requirements of the process.
 The transfer of thermal energy (heat) can be
accomplished in three ways:
 Radiation
Convection
Conduction
TYPES OF HEAT EXCHANGER
 Shell-and-tube heat exchangers
 Air-cooled heat exchangers
 Double-pipe heat exchangers
 Plate-and-frame heat exchangers
fdocuments.in_heat-exchanger-presentation-558459443a0b6.ppt
TYPES OF HEAT EXCHANGER
TYPES OF HEAT EXCHANGER
Horizontal Tube, Induced-Draft Air-Cooled Heat Exchanger
Inlet
Nozzles
Return
Headers
Fan Ring
Supports
Drive Assembly
Tube Bundle
Outlet
Nozzles
Outlet
Headers
Inlet
Headers
Hood or Plenum
Fan
Air-Cooled Heat Exchangers
Double-Pipe Heat Exchanger
Shell Cover Gasket
Shell
External Fin Pipe
Shell End Piece
Twin Flange
Return Bend
(welded)
Shell
Cover
Vent
Drain Sliding
Support
Fixed
Support
SHELL AND TUBE HEAT EXCHANGER
 These types of heat exchangers are most
commonly and widely used in process
industries.
 Design criteria:
1. TEMA Standards
Tubular Exchanger Manufacturer's Association
2. API 660 (American Petroleum Institute)
Standards
Shell and Tube Heat Exchangers for General
Refinery Services
SHELL AND TUBE HEAT EXCHANGER
 Basic components of SHELL and TUBE heat
exchanger are:
 Tubes: Provide heat transfer surface
 Shell or Body: Enclose the area in
which fluids flow
 Nozzles: Inlet and outlet for fluid
flow
 Tube Sheet: Hold the tube in place
SHELL AND TUBE HEAT EXCHANGER
 Baffles: Support the tubes in proper
position and guide the shell side flow to
increase heat transfer
 Channel Cover: Allows tube inspection
 Pass Divider: Separate the tube side Flow
TYPES SHELL AND TUBE HEAT EXCHANGER
 Fixed Tube sheet
 Tube sheet is welded to the shell.
 Tube bundle is permanently installed.
 Used when the temperature range is
limited and shell side fouling is limited.
 U-Tube or U-Bend:
 Has only one tube sheet
 Tube bundle can be removed
 Used where temperature difference
between shell and tube side fluids are
high.
TYPES SHELL AND TUBE HEAT EXCHANGER
 Floating Head
 Tube bundle can be pulled out.
 Tube sheet on one side is bolted between
channel and shell.
 Tube sheet on the other side floats inside
the shell and free to move horizontally.
 Test ring is required for hydro test.
TYPES SHELL AND TUBE HEAT EXCHANGER
FIN FAN COOLER
 Tubes are Round or Rectangular.
 Fins generally on the outside of the tubes.
 For some applications fins may be inside
of the tube.
 Fins are attached to the tubes by a tight
mechanical fit, tension winding, adhesive
bonding, soldering , brazing and welding
etc.
Nozzle
Header
Tube spacer Side Frame
Fins
Tube Support
(bottom)
Tube
Air Seal
Header
Lifting Lug
Tube Keeper
(top)
Air Seal
Air Seal
Typical Air-Cooled Heat Exchanger
PLATE HEAT EXCHANGER
 Consist of a number of corrugated metal
plates in mutual contact.
 Each plate having four ports( Inlet and
Outlet).
Cin
Plate-and-Frame Heat Exchanger
Separating
Sheet
Bin
Aout Nozzle
Header
Corrugated
Sheet
Side Bar
Distributor
Effective
Length
Effective
Width
Heat Transfer
Section
Distribution
Section
Cout
Ain Bout
B
A
PROBLEMS IN HEAT EXCHANGER
 Fouling:
 Fouling is the build-up of different kinds of
deposits on the parts of an exchanger.
 Fouling effectively increases tube wall
thickness due to fouling particles.
 Pressure drop across exchanger increases.
 Due to fouling, time of heat transfer
increases.
PROBLEMS IN HEAT EXCHANGER
 Tube leakage:
 Removal of metal due to fluid flowing in
or across the tube.
 Can eat away and weaken tube metal
which may lead to tube leak
 Scale Formation:
 Build up of solid impurities on the inside
of a tube wall.
 Tube Leak:
 It affects heat transfer process.
CLEANING OF HEAT EXCHANGER
 The method of cleaning is selected depending
upon type of deposit and facilities in the plant.
1. High pressure water jet wash:
 Hydro jet machine is used .
 Water jet pressure around 5000 to 10000
PSI.
 During hydro jet cleaning all required PPE
shall be used as the water jet can easily
puncture and tear the skin.
CLEANING OF HEAT EXCHANGER
2. Chemical cleaning:
 Involves circulation of hot wash oil or light
distillate through tubes or shell.
 Cleaning compounds should be
compatible with the metallurgy of the
exchanger.
 Sometimes commercial cleaning solutions
are used.
3. Mechanical Cleaning:
 Involves tube cleaning using a wire brush
or scrappers.
 Care should be taken to avoid damaging
the tubes
HEAT EXCHANGER MAINTENANCE
 ACTIVITIES:
 1. SCAFFOLDING
 2.BLINDING
 3.INSULATION REMOVAL
 4.DRAINING
 5.HEAD COVER REMOVAL
 6.PRE-INSPECTION
 7.BUNDLE PULLINGOUT/HYDROJET CLEANING
 8.TUBE BLOWING
 9.SHELL SIDE/TUBE SIDE HYDROTEST/PNEUMATIC TEST
 10.IRIS TEST
 11. PLUG INSERT/WELD
 12.RE-HYDROTEST
 13.HEAD COVER BOXUP
 14.BLIND REMOVAL
THANKS

Mais conteúdo relacionado

Semelhante a fdocuments.in_heat-exchanger-presentation-558459443a0b6.ppt

HEAT_EXCHANGER_Final.ppt
HEAT_EXCHANGER_Final.pptHEAT_EXCHANGER_Final.ppt
HEAT_EXCHANGER_Final.pptPrashantKuwar
 
Heat Exchanger
Heat ExchangerHeat Exchanger
Heat ExchangerNathan
 
IRJET- Analysis of Shell and Tube Heat Exchangers
IRJET- Analysis of Shell and Tube Heat ExchangersIRJET- Analysis of Shell and Tube Heat Exchangers
IRJET- Analysis of Shell and Tube Heat ExchangersIRJET Journal
 
Modern technologies in heat exchangers
Modern technologies in heat exchangersModern technologies in heat exchangers
Modern technologies in heat exchangersAbdullah Mansoor
 
Heat exchanger.pptx
Heat exchanger.pptxHeat exchanger.pptx
Heat exchanger.pptxshah maulik
 
Heat exchanger design
Heat exchanger designHeat exchanger design
Heat exchanger designadnanali309
 
Process design of heat exchanger
Process design of heat exchangerProcess design of heat exchanger
Process design of heat exchangerDila Shah
 
Design of heat exchanger
Design of heat exchangerDesign of heat exchanger
Design of heat exchangerNikhil chikhale
 
Heat Exchagers Presentation.pdf
Heat Exchagers Presentation.pdfHeat Exchagers Presentation.pdf
Heat Exchagers Presentation.pdfKAhmedRehman
 
Heat exchanger types and hydro testing
Heat exchanger types and hydro testingHeat exchanger types and hydro testing
Heat exchanger types and hydro testingwaqarahmed445
 
Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger wasihaider16
 
Heat Exchanger pdf.pptx
Heat Exchanger pdf.pptxHeat Exchanger pdf.pptx
Heat Exchanger pdf.pptxnaveenmm7
 
Plate type heat exchanger by vikas saini
Plate type heat exchanger by vikas sainiPlate type heat exchanger by vikas saini
Plate type heat exchanger by vikas sainiVikas Saini
 
Heat-exchanger-manual
Heat-exchanger-manualHeat-exchanger-manual
Heat-exchanger-manualAbdelrhman K.
 
Heat Exchangers types.pdf
Heat Exchangers types.pdfHeat Exchangers types.pdf
Heat Exchangers types.pdfKAhmedRehman
 

Semelhante a fdocuments.in_heat-exchanger-presentation-558459443a0b6.ppt (20)

HEAT_EXCHANGER_Final.pptx
HEAT_EXCHANGER_Final.pptxHEAT_EXCHANGER_Final.pptx
HEAT_EXCHANGER_Final.pptx
 
HEAT_EXCHANGER_Final.ppt
HEAT_EXCHANGER_Final.pptHEAT_EXCHANGER_Final.ppt
HEAT_EXCHANGER_Final.ppt
 
Heat Exchangers
Heat ExchangersHeat Exchangers
Heat Exchangers
 
Heat exchangers
Heat exchangersHeat exchangers
Heat exchangers
 
Heat Exchanger
Heat ExchangerHeat Exchanger
Heat Exchanger
 
IRJET- Analysis of Shell and Tube Heat Exchangers
IRJET- Analysis of Shell and Tube Heat ExchangersIRJET- Analysis of Shell and Tube Heat Exchangers
IRJET- Analysis of Shell and Tube Heat Exchangers
 
Modern technologies in heat exchangers
Modern technologies in heat exchangersModern technologies in heat exchangers
Modern technologies in heat exchangers
 
Heat exchanger.pptx
Heat exchanger.pptxHeat exchanger.pptx
Heat exchanger.pptx
 
Heat exchanger design
Heat exchanger designHeat exchanger design
Heat exchanger design
 
Condenser design
Condenser designCondenser design
Condenser design
 
Process design of heat exchanger
Process design of heat exchangerProcess design of heat exchanger
Process design of heat exchanger
 
Design of heat exchanger
Design of heat exchangerDesign of heat exchanger
Design of heat exchanger
 
Heat Exchagers Presentation.pdf
Heat Exchagers Presentation.pdfHeat Exchagers Presentation.pdf
Heat Exchagers Presentation.pdf
 
Heat exchanger types and hydro testing
Heat exchanger types and hydro testingHeat exchanger types and hydro testing
Heat exchanger types and hydro testing
 
Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger Shell and Tube Heat Exchanger
Shell and Tube Heat Exchanger
 
Heat Exchanger pdf.pptx
Heat Exchanger pdf.pptxHeat Exchanger pdf.pptx
Heat Exchanger pdf.pptx
 
HEAT EXCHANGERS
HEAT EXCHANGERSHEAT EXCHANGERS
HEAT EXCHANGERS
 
Plate type heat exchanger by vikas saini
Plate type heat exchanger by vikas sainiPlate type heat exchanger by vikas saini
Plate type heat exchanger by vikas saini
 
Heat-exchanger-manual
Heat-exchanger-manualHeat-exchanger-manual
Heat-exchanger-manual
 
Heat Exchangers types.pdf
Heat Exchangers types.pdfHeat Exchangers types.pdf
Heat Exchangers types.pdf
 

Último

P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfP4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfYu Kanazawa / Osaka University
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxheathfieldcps1
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17Celine George
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptxmary850239
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRATanmoy Mishra
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17Celine George
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...Nguyen Thanh Tu Collection
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationMJDuyan
 
Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxraviapr7
 
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfTechSoup
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational PhilosophyShuvankar Madhu
 
Quality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICEQuality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICESayali Powar
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxAditiChauhan701637
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...CaraSkikne1
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptxSandy Millin
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17Celine George
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...raviapr7
 

Último (20)

P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdfP4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
P4C x ELT = P4ELT: Its Theoretical Background (Kanazawa, 2024 March).pdf
 
The basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptxThe basics of sentences session 10pptx.pptx
The basics of sentences session 10pptx.pptx
 
How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17How to Use api.constrains ( ) in Odoo 17
How to Use api.constrains ( ) in Odoo 17
 
Prelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quizPrelims of Kant get Marx 2.0: a general politics quiz
Prelims of Kant get Marx 2.0: a general politics quiz
 
3.21.24 The Origins of Black Power.pptx
3.21.24  The Origins of Black Power.pptx3.21.24  The Origins of Black Power.pptx
3.21.24 The Origins of Black Power.pptx
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17
 
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
CHUYÊN ĐỀ DẠY THÊM TIẾNG ANH LỚP 11 - GLOBAL SUCCESS - NĂM HỌC 2023-2024 - HK...
 
Benefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive EducationBenefits & Challenges of Inclusive Education
Benefits & Challenges of Inclusive Education
 
Education and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptxEducation and training program in the hospital APR.pptx
Education and training program in the hospital APR.pptx
 
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdfMaximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
Maximizing Impact_ Nonprofit Website Planning, Budgeting, and Design.pdf
 
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdfPersonal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
 
Finals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quizFinals of Kant get Marx 2.0 : a general politics quiz
Finals of Kant get Marx 2.0 : a general politics quiz
 
Philosophy of Education and Educational Philosophy
Philosophy of Education  and Educational PhilosophyPhilosophy of Education  and Educational Philosophy
Philosophy of Education and Educational Philosophy
 
Quality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICEQuality Assurance_GOOD LABORATORY PRACTICE
Quality Assurance_GOOD LABORATORY PRACTICE
 
In - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptxIn - Vivo and In - Vitro Correlation.pptx
In - Vivo and In - Vitro Correlation.pptx
 
5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...5 charts on South Africa as a source country for international student recrui...
5 charts on South Africa as a source country for international student recrui...
 
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
 
How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17How to Make a Field read-only in Odoo 17
How to Make a Field read-only in Odoo 17
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...
 

fdocuments.in_heat-exchanger-presentation-558459443a0b6.ppt

  • 1. INTRODUCTION Definition:  Heat exchangers are devices that transfer or exchange heat from one media to another. It is used either for cooling or for heating purpose.  The mediums flowing inside the heat exchanger may be gas or liquid depending upon the service requirements of the process.  The transfer of thermal energy (heat) can be accomplished in three ways:  Radiation Convection Conduction
  • 2. TYPES OF HEAT EXCHANGER  Shell-and-tube heat exchangers  Air-cooled heat exchangers  Double-pipe heat exchangers  Plate-and-frame heat exchangers
  • 4. TYPES OF HEAT EXCHANGER
  • 5. TYPES OF HEAT EXCHANGER
  • 6. Horizontal Tube, Induced-Draft Air-Cooled Heat Exchanger Inlet Nozzles Return Headers Fan Ring Supports Drive Assembly Tube Bundle Outlet Nozzles Outlet Headers Inlet Headers Hood or Plenum Fan Air-Cooled Heat Exchangers
  • 7. Double-Pipe Heat Exchanger Shell Cover Gasket Shell External Fin Pipe Shell End Piece Twin Flange Return Bend (welded) Shell Cover Vent Drain Sliding Support Fixed Support
  • 8. SHELL AND TUBE HEAT EXCHANGER  These types of heat exchangers are most commonly and widely used in process industries.  Design criteria: 1. TEMA Standards Tubular Exchanger Manufacturer's Association 2. API 660 (American Petroleum Institute) Standards Shell and Tube Heat Exchangers for General Refinery Services
  • 9. SHELL AND TUBE HEAT EXCHANGER  Basic components of SHELL and TUBE heat exchanger are:  Tubes: Provide heat transfer surface  Shell or Body: Enclose the area in which fluids flow  Nozzles: Inlet and outlet for fluid flow  Tube Sheet: Hold the tube in place
  • 10. SHELL AND TUBE HEAT EXCHANGER  Baffles: Support the tubes in proper position and guide the shell side flow to increase heat transfer  Channel Cover: Allows tube inspection  Pass Divider: Separate the tube side Flow
  • 11. TYPES SHELL AND TUBE HEAT EXCHANGER  Fixed Tube sheet  Tube sheet is welded to the shell.  Tube bundle is permanently installed.  Used when the temperature range is limited and shell side fouling is limited.  U-Tube or U-Bend:  Has only one tube sheet  Tube bundle can be removed  Used where temperature difference between shell and tube side fluids are high.
  • 12. TYPES SHELL AND TUBE HEAT EXCHANGER  Floating Head  Tube bundle can be pulled out.  Tube sheet on one side is bolted between channel and shell.  Tube sheet on the other side floats inside the shell and free to move horizontally.  Test ring is required for hydro test.
  • 13. TYPES SHELL AND TUBE HEAT EXCHANGER
  • 14. FIN FAN COOLER  Tubes are Round or Rectangular.  Fins generally on the outside of the tubes.  For some applications fins may be inside of the tube.  Fins are attached to the tubes by a tight mechanical fit, tension winding, adhesive bonding, soldering , brazing and welding etc.
  • 15. Nozzle Header Tube spacer Side Frame Fins Tube Support (bottom) Tube Air Seal Header Lifting Lug Tube Keeper (top) Air Seal Air Seal Typical Air-Cooled Heat Exchanger
  • 16. PLATE HEAT EXCHANGER  Consist of a number of corrugated metal plates in mutual contact.  Each plate having four ports( Inlet and Outlet).
  • 17. Cin Plate-and-Frame Heat Exchanger Separating Sheet Bin Aout Nozzle Header Corrugated Sheet Side Bar Distributor Effective Length Effective Width Heat Transfer Section Distribution Section Cout Ain Bout B A
  • 18. PROBLEMS IN HEAT EXCHANGER  Fouling:  Fouling is the build-up of different kinds of deposits on the parts of an exchanger.  Fouling effectively increases tube wall thickness due to fouling particles.  Pressure drop across exchanger increases.  Due to fouling, time of heat transfer increases.
  • 19. PROBLEMS IN HEAT EXCHANGER  Tube leakage:  Removal of metal due to fluid flowing in or across the tube.  Can eat away and weaken tube metal which may lead to tube leak  Scale Formation:  Build up of solid impurities on the inside of a tube wall.  Tube Leak:  It affects heat transfer process.
  • 20. CLEANING OF HEAT EXCHANGER  The method of cleaning is selected depending upon type of deposit and facilities in the plant. 1. High pressure water jet wash:  Hydro jet machine is used .  Water jet pressure around 5000 to 10000 PSI.  During hydro jet cleaning all required PPE shall be used as the water jet can easily puncture and tear the skin.
  • 21. CLEANING OF HEAT EXCHANGER 2. Chemical cleaning:  Involves circulation of hot wash oil or light distillate through tubes or shell.  Cleaning compounds should be compatible with the metallurgy of the exchanger.  Sometimes commercial cleaning solutions are used. 3. Mechanical Cleaning:  Involves tube cleaning using a wire brush or scrappers.  Care should be taken to avoid damaging the tubes
  • 22. HEAT EXCHANGER MAINTENANCE  ACTIVITIES:  1. SCAFFOLDING  2.BLINDING  3.INSULATION REMOVAL  4.DRAINING  5.HEAD COVER REMOVAL  6.PRE-INSPECTION  7.BUNDLE PULLINGOUT/HYDROJET CLEANING  8.TUBE BLOWING  9.SHELL SIDE/TUBE SIDE HYDROTEST/PNEUMATIC TEST  10.IRIS TEST  11. PLUG INSERT/WELD  12.RE-HYDROTEST  13.HEAD COVER BOXUP  14.BLIND REMOVAL

Notas do Editor

  1. 7
  2. 15