• HOME
• About CHIYODA

  • Message from Management

  • Corporate Profile

  • Corporate Profile
  • Major Domestic Subsidiaries & Affiliated Companies
  • Major Overseas Subsidiaries & Affiliated Companies

  • History

  • Philosophy/Vision/Policies

  • Philosophy / Vision / Policies
  • CORPORATE SQE POLICY
  • Corporate Information Security Policy
  • Code of Conduct of the Chiyoda Group
  • Privacy Policy
  • CSR vision
  • Chiyoda Group Compliance Manual

  • Organization

  • Corporate Governance

  • Board of Directors

  • Directors & Officers
  • Management Team（Representative Directors）

  • Access to CHIYODA

  • Yokohama Head Office
  • Koyasu Office & Research Park
  • Kawasaki Office
  • Tokyo Office
• Service

  • Planning Phase

  • Master Planning
  • Feasibility Studies (FS)
  • Licensing
  • Process Development Support

  • EPC Phase

  • FEED (Front End Engineering Design)
  • Engineering
  • Procurement
  • Construction
  • Commissioning

  • Operation and Maintenance Phase

  • Process Improvements
  • Utility System Improvements
  • Improvements in Equipment Reliability
  • Environmental Improvements
  • O&M Consulting Service
• Technology
  • LNG
  • Upstream / Gas Processing
  • Refinery
  • Synthetic Gas / GTL
  • Petrochemical / Chemical
  • Nuclear Energy-related Matters, etc.
  • Green Energy related
  • Pharmaceutical
  • Environmental
  • Technologies for the Future
  • Advanced Engineering Technology
• Project

  • Location

  • Far East Asia
  • Asia & Oceania
  • Middle East
  • Africa
  • Europe
  • the Americas

  • Scope of Work

  • LNG/Gas Processing
  • LNG/LPG Terminal
  • Petroleum Refineries
  • Oil Terminal
  • Petrochemical & Chemical
  • Flue Gas Desulfurization
  • Pharmaceutical
  • Green Energy

  • Year of Completion

  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005
• News
  • 2012
  • 2011
  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005
  • 2004
  • 2003
  • Regarding the earthquake
• Investor Relations

  • Management Srrategy

  • Medium-Term Management Plan
  • Risk Factors

  • IR library

  • Report to TSE / Press Release
  • Annual Report
  • Fact Book
  • Notice of the General Meeting of Shareholders

  • IR Calender

  • Stock & Share Information

  • Major Shareholders
  • Dividend Policy
  • Articles of incorporation

  • Analyst Coverage

• CSR

  • A Message from the President

  • Commitment to CSR

  • CSR Policy
  • Chiyoda Group CSR Vision

  • Corporate Governance

  • CSR Report

  • A Reliable Company (Vision 1)

  • Quality Management Initiatives
  • Working with Business Partners

  • Environmental Initiatives (Vision 2)

  • Environmental Management
  • Environmental Conservation Activities ・ Environmental Data
  • Low Carbon Society

  • Social Contributions through Business Activities (Vision 3)

  • Community
  • Human Resources
  • Fundraising ・ Donations

  • Respect for Human Rights (Vision 4)

  • Employee Skill Development and Work Environment
  • Occupational Health and Safety

  • Commitment to Fairness (Vision 5)

  • Code of Conduct of the Chiyoda Group
  • Compliance
  • Information Security Management and Export Control

• Japanese
• English

CHIYODA THOROUGHBRED 121 (CT-121) is the advanced Limestone Forced Oxidation (LSFO) Flue Gas Desulfurization (FGD) Technology and proven by so many commercial experiences in the large thermal power plants, worldwide.

Process Flow

1. Absorption, Oxidation, Neutralization and Crystallization
   The heart of the CT-121 FGD process is the unique Jet Bubbling Reactor (JBR). All necessary steps for SO₂ absorption, oxidation, neutralization and crystallization occur simultaneously in the JBR.
   The flue gas is dispersed into the scrubbing liquid through multiple gas sparging tubes, creating small bubbles which are broken by the liquid’s motion. Oxidation, neutralization, crystallization occur in the reaction zone, the main area for liquid phase of JBR. Air and limestone are dissolved into the liquid through bubbling and agitation. The gypsum crystals grow to the desired size after sufficient residence times and the gypsum slurry is drawn off.
   The clean gas passed through JBR and mist eliminator is released to the atmosphere.
2. Limestone Slurry Preparation Unit
   Limestone slurry is prepared by the pulverized limestone and the filtrate from gypsum dewatering unit and fed to JBR to neutralize the JBR liquid.
3. Gypsum Dewatering Unit
   The gypsum slurry from JBR is fed to the gypsum dewatering system and by-product gypsum　is produced. The filtrate of gypsum slurry is reused to prepare the limestone slurry.

Low Construction and Maintenance Costs

• Compact design due to low JBR height and simple design without large liquid circulation pumps save construction and maintenance costs.

Low Operation Costs

• Low power consumption and easy operation & maintenance due to mechanically simple design result in minimal staffing requirements and low operation costs.

High Reliability

• Almost 100% reliability for all existing plants

High Flexibility

• High SO₂ removal efficiency is achievable at wide inlet SO₂ concentration range, and allow for fuel flexibility consequently.
• Easy Load following operation
• Wide Turn down capability

Additional Benefits

• High particulate removal
• High Air Toxics removal
• High quality byproduct gypsum