M Crespi , JM Jaillet

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Maritza East 1 Desulphurization plants for a
better environment
M Crespi , JM Jaillet G Catalano
10th CEI Summit Economic Forum Sofia 21/22 Nov.
07
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Agenda
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3D model of the power plant
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Context of the project
Maritza
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Context of the project
Specific project conditions/objectives

• Meet the future electricity demand in the country
• Possibly substitute old, unsafe, inefficient and
  environmentally hostile power plants, both
  lignite, hard coal
• Meet lignite extraction targets for the Maritza
  East mines
• Due to general low-grade quality of Bulgarias
  lignite gt Air Pollution Control equipment are
  necessary
• Improve environmental conditions in the area

Maritza East 1 project has several objectives
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Agenda
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Technical description
Project characteristics

• Full turnkey project
• 670 MWe gross, 600 MWe net USC boilers with high
  efficiency2 units of 335 MWe each to be realized
  adjacent to the existing Maritza East 1 power
  plant
• Lignite-fired plant with the state of the art APC
  equipment
• End user AES-3C
• Base load facility, effective annual capacity
  factor of 95

gt Can be achieved only with careful selection of
key components
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Layout of the installation
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Agenda
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Impact on the region
Many positive impacts on different aspects

• Regional development
• Employment
• Continuation of lignite mine and limestone quarry
  operations
• Tax revenues
• Related industries
• Technology transfer
• Overall stimulation at the local and national
  levels

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Agenda
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Environmental compliance
Environmental friendly project

• Noise emissions - attention given for both the
  installation and the surroundings - majority of
  noisy components installed within a building -
  ID fans fitted with discharge silencers -
  distance from external receptors maximized
• Local water quality improvement - zero
  discharge of process water - lakes rivers
  protected - reduce thermal and chemical impact
  to surface water quality - WFGD make-up water
  partly constituted by the blow-down from the main
  cooling tower to reduce water consumption

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Environmental compliance
Improved air quality by removing the SO2

• Reduced ecological impact resulting from acid
  rains (especially for forest and lakes)
• Long term improvement and human health benefits
  by applying the Bulgarian, European and World
  Bank ambient air quality criteria
• The actual regulation in Bulgaria on SO2, Nox,
  CO, Pb, PM10 and PM2.5more or less mirrors the
  EU regulation (PM2.5 is not yet regulated by EU)
• The World Bank qualifies as poor the air quality
  in the region at the moment regarding the SO2

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Environmental compliance
WFGD design details

• Designed for SO2 inlet concentration of 21890
  mg/Nm3 (dry 6 O2), equivalent to 2.7 sulphur
  content of the lignite. Would not exceed 400
  mg/Nm3 as SO2 outlet concentration (more than 98
  of the SO2 is removed)
• Absorber designed for 22500 ppm Chlorides content
  (material selection for 35000 ppm)
• Blow-down flow rate minimized and fixed at 10
  m3/hr
• 7 spray levels at design conditions, only 6 in
  operation at guaranteed conditions
• Absorber equipped with Performance Enhancement
  Plates (Alstom patent to reduce the
• gas by-pass along the walls and thus power)
• Gypsum by-product to be landfilled as inert
  material

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Environmental compliance
Tail of equipments for one unit
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Environmental compliance
Summary
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Environmental compliance
Summary
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Environmental compliance
Summary
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Agenda
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Conclusions

• Eastern Europe countries are more and more
  focused on sustainable development
• A power station can play an important role if
  properly designed.
• Alstom Maritza East 1 Power Plant has one of the
  highest efficiency thus using less lignite per KW
  produced as well as most advanced APC equipment
  to reduce emissions below LCPD Directive
• The project will help Bulgarias development and
  pave the way to further power projects and
  investment in the country

As a global specialist in plants integration and
environmental control systems, Alstom has paid
careful attention to any aspects of the Maritza
East 1 project, thus preserving air, water and
soil
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