![Page 1: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/1.jpg)
John Thompson Boilers and latest developments
Etienne de Villiers
19 September 2013
![Page 2: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/2.jpg)
Alstom John Thompson
Packaged firPackaged Firetube Boilers
![Page 3: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/3.jpg)
Firetube Boilers
• Produce saturated steam for process• Capacities: 0.5 t/h up to 20t/h• Steam conditions: 7-20 bar saturated steam• Fuels: Gas, HFO, LFO, coal and wood• Furnace and combustion equipment arrangements
– Swinging chutes & chain grate stoker for coal– Stationary grate for firing logs– Brick set stepgrate furnace for fibrous fuel firing– Water cooled cylindrical furnace for gas/oil firing
![Page 4: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/4.jpg)
Package Boiler
Boiler
FD Fan ID Fan
Stoker
Grit Arrestor
![Page 5: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/5.jpg)
Coal Fired Firetube Boiler Installation
![Page 6: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/6.jpg)
Alstom John Thompson
Industrial Watertube Boilers
![Page 7: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/7.jpg)
Industrial Watertube Boilers
• Produce superheated steam for power generation• Capacities: 20t/h up to 200t/h• Steam pressures: 20-110 bar • Superheated steam: 280-540oC• Fuels: Gas, HFO, LFO, coal and fibrous biomass• Combustion equipment and furnace configurations
– Pneumatic fuel spreading of biomass and coal– Dump or steam cleaned grate for suspension firing– Moving grate for firing coal and high ash biomass fuels– Burners for gas, LFO and HFO– Water cooled furnace with membrane wall construction
![Page 8: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/8.jpg)
Watertube Boilers
Configured for different fuels e.g.:• Sugar industry – bagasse & coal
• Paper industry- woodchips and bark
• Petro-chemical industry – oil or gas
![Page 9: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/9.jpg)
• Primary fuel - Bagasse
• Secondary fuel - Coal
• 50-200 t/h
• 3 100-8 200 kPa
• 385-520ºC
• Power generation boilers
• Bagasse feeders
• Coal bunker & feeders
• Pneumatic spreaders
Typical Bi-drum Sugar Mill Boiler
![Page 10: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/10.jpg)
Coal feeders
Fuel Feeders on Coal/Bagasse Boiler
![Page 11: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/11.jpg)
Pneumatic Fuel Spreader
![Page 12: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/12.jpg)
Moving Grate
![Page 13: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/13.jpg)
Efficient Combustion
![Page 14: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/14.jpg)
Stationary Steam Cleaned Grate
![Page 15: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/15.jpg)
Heat Recovery Tower
![Page 16: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/16.jpg)
105tph Bi-drum for Co-generation
![Page 17: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/17.jpg)
Alstom John Thompson
Latest Developments
![Page 18: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/18.jpg)
Market Trends and Demands
• Need for electrical power in developing world• Need for medium to small, efficient power stations• Conversions of process steam plants to co-gen plants• High fuel costsè need for energy security(Use fuels locally available to displace imported oil products)
è Small power island with optimised cycle efficiencyè Small higher pressure biomass / coal fired power boilersè Emphasis on efficient combustion of coal and biomassè Improved plant reliability to provide secure power supply
![Page 19: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/19.jpg)
Alstom John Thompson
Increased cycle efficiency
![Page 20: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/20.jpg)
Cycle Efficiency = f(Steam Pressure)
• Cycle efficiency increases with increase in steam pressure• Demand for boilers pressures of 8 200 – 11 000kPa(g)
![Page 21: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/21.jpg)
Bi-drum vs Mono-drum at higher pressures
• Disadvantages of bi-drum design at higher pressures– Drum drilling requires very thick walls– Expanded tube construction no longer possible– Reduced effectiveness of evaporation bank at high pressure
• Advantages of mono-drum design at higher pressures– Single drum with relatively thin wall – Evaporation bank reduced in favour of larger superheater– Emphasis on large banks of economiser– Fully welded pressure part construction
![Page 22: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/22.jpg)
From Bi-drum to HP Mono-drum
![Page 23: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/23.jpg)
• Coal and biomass
• 120-250 t/h
• 8 200 – 12 000kPa
• Fully welded construction
High Pressure Mono-drum Boilers
![Page 24: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/24.jpg)
Alstom John Thompson
Small Biomass Fired Power boiler
![Page 25: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/25.jpg)
20t/h Biomass/Coal Fired Boiler
• MicroGen Boiler• 20t/h steam
Up to 61bar(g)Up to 460oCFuel: Coal or Biomass
• Efficient• Compact• Short delivery• Quick installation/erection• Modular power station
![Page 26: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/26.jpg)
Combustion Equipment
CAD stoker&pneumaticspreaders
![Page 27: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/27.jpg)
Pressure Envelope
![Page 28: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/28.jpg)
Alstom John Thompson
Computational Fluid Dynamics
![Page 29: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/29.jpg)
Computational Fluid Dynamics (CFD)
– Combustion modelling– Thermal modelling– Accurate prediction of radiation into the superheater– Mitigate erosion risk
• Model of particle trajectories for potential erosion– Mitigate tube failures due to insufficient circulation
• Model of heat flux profile in the furnace
![Page 30: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/30.jpg)
CFD - Flame Profile in Furnace
![Page 31: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/31.jpg)
CFD – Reducing Unburnt in Fly Ash
Particle char mass fractionParticle volatile mass fraction
![Page 32: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/32.jpg)
CFD – Different Secondary Air Distributions
![Page 33: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/33.jpg)
CFD – Flame Profile in the Furnace
![Page 34: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/34.jpg)
CFD – Increasing Furnace Residence Time
![Page 35: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/35.jpg)
CFD – Particle Trajectories by Size
![Page 36: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/36.jpg)
CFD – Particle Trajectories by Size
3D view of particle tracks coloured by diameter, injected at the spreader inlets [m]
![Page 37: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/37.jpg)
Biomass: Velocity of Particle Tracks
![Page 38: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/38.jpg)
CFD - Heat Flux for Circulation Assessment
![Page 39: John Thompson Boilers and latest developments - Fossil · PDF fileJohn Thompson Boilers and latest developments Etienne de Villiers 19 September 2013](https://reader038.vdocuments.us/reader038/viewer/2022103106/5a6fd7647f8b9ab6538b7379/html5/thumbnails/39.jpg)
MicroGen Boiler
Thank you