Areas - Air Quality Control - Fixed Sources

Environmental Technologies with Co-benefits

Air Quality

Technology 1300℃-class combined cycle power generation (ACC power generation) technology
Overview ・A combined-cycle power generation system for driving a gas turbine at a high temperature of 1300℃ and driving a steam turbine by the remaining heat.
・A combination of two types of turbines increases the power generation efficiency up to about 55% (low-order calorific value reference).
Company Mitsubishi Heavy Industries, Ltd.,
GE, etc.
Area Stationary generation source
SubArea Electric Power Industry
Categories High-efficiency power generation
Technology Pressurized fluidized bed boiler
Overview ・Coal is burnt at about 850℃ under a pressure of 6 to 20 atmospheric pressure.
・A combustion effluent gas of high temperature and high pressure is used to drive a gas turbine. Power generation efficiency is improved by a combined cycle with steam turbine.
Company IHI, Babcock Hitachi
Area Stationary generation source
SubArea Electric Power Industry
Categories High-efficiency power generation
Technology Integrated coal gasification combined cycle power generation (IGCC)
Overview ・A coal-fired high-efficiency power plant consisting of an air blow two-level entrained bed gasified and /dry type fuel supply system combined with the dry type fixed bed gas purifier or wet type gas purifier
・This system is capable of gasifying coal and converting it into clean fuel, and is characterized by high environment friendly performances in volume reduction and prevention of leaching by slag treatment of ashes.
Company Mitsubishi Heavy Industries, Ltd., Babcock Hitachi
Area Stationary generation source
SubArea Electric Power Industry
Categories High-efficiency power generation
Technology Improved power generation efficiency
Overview Advanced thermal diagnostic method, facility improvement technology and operation
・Existing thermal power plants by maintenance management technology
Company Energy Conservation Association and others (thermal diagnosis)
Boiler manufacturer (facility improvement technology)
Energy conservation Association and others (combustion management)
Area Stationary generation source
SubArea Electric Power Industry
Categories Improved power generation efficiency
Technology Coke dry quencher (CDQ) technology
Overview ・Red-hot coke having a temperature of about 1000℃ is dry-cooled by inert gas in a chamber.
・Inert gas recovers the sensible heat of the red-hot coke. This recovered heat is heat-exchanged with steam by a boiler. The cooled inert gas is again put into the chamber for recirculation.
・The generated steam is used for power generation and as a high-pressure steam or lower pressure steam in the factory.
・As compared with the wet cooling method, this technique improves the strength of coke, without dissipation of steam, dust or gas into the atmosphere. Coke strength is also improved.
Company Nippon Steel Corp., Sumitomo Metal Industries, Ltd., Kobe Steel, Ltd., JFE Steel, etc.
Area Stationary generation source
SubArea Steel industry
Categories Coke dry quenching (CDQ)
Technology Blast furnace gas expander power generation technology
Overview In the blast furnace gas expander power generation, an expansion turbine is installed along the way the blast furnace gas generated in the blast furnace (gas B) is led to the gas holder. While pressure is reduced, the turbine power generator is driven by the pressure energy so that power is generated.
The power recovered in this manner is used to cover about 95 percent of all the power required in the blast furnace plant.
Company Mitsui Shipbuilding Co., Ltd., Nippon Steel Corp., Sumitomo Metal Industries, Ltd, Kobe Steel, Ltd., JFE Steel
Area Stationary generation source
SubArea Steel industry
Categories Blast furnace gas expander power generation technology
Technology Hot-air oven exhaust heat recovery facility
Overview The fuel gas of the hot-air oven and air for combustion are preheated by the heat recovered from the effluent gas of the hot-air oven, thereby achieving:
① Reduction in the amount of hot-air oven fuel gas used, and
② Reduction in the coke ratio in the blast furnace due to the rise in the temperature inside the hot-air oven and blow air temperature
Company Nippon Steel Corp.
Area Stationary generation source
SubArea Steel industry
Categories Exhaust heat recovery
Technology Converter exhaust heat recovery facility
Overview The sensible heat of effluent gas from the converter is recovered and converted into steam.
The generated steam is effectively used in the steel work as high-pressure or low-pressure steam.
Company Nisshin Steel Co., Ltd.
Area Stationary generation source
SubArea Steel industry
Categories Exhaust heat recovery
Technology Sinter cooler exhaust heat recovery facility
Overview Sensible heat is discharged when cooling a high-temperature product sintering ore is cooled in a cooler attached to the sintering device of the iron ore material. This facility recovers this sensible heat and converts it into steam.
Generated steam is used for power generation and as high-pressure or low-pressure steam in the steel work.
Company Sumitomo Metal Industries, Ltd.
Area Stationary generation source
SubArea Steel industry
Categories Exhaust heat recovery
Technology Steel heating furnace exhaust heat recovery facility
Overview Air for combustion is preheated by the heat recovered from the effluent gas of the steel heating furnace, whereby the volume of the fuel used in this furnace is reduced. Further, heat exchange with steam is made by the recovered heat. The generated steam is used as high-pressure or low-pressure steam in the steel work.
Company Kobe Steel, Ltd., etc.
Area Stationary generation source
SubArea Steel industry
Categories Exhaust heat recovery
Technology High-speed switching thermal storage type combustion system
Overview A high-speed switching thermal storage type combustion system capable of ensuring an exhaust heat recovery rate as high as 75 to 80% is used for high-temperature air combustion, thereby achieving substantial energy conservation.
In the high-speed switching thermal storage type combustion system, while one of the burners is operating for combustion, exhaust is discharged by the other burner, thereby heating the regenerator. This operation is switched a short cycle of 20 sec. to 2 min. Air is made to pass through the heated regenerator for the sake of combustion.
This combustion system implements both the high-temperature preheated air combustion and high-temperature exhaust heat recovery.
Company Developed by NFK Holdings
Area Stationary generation source
SubArea Steel industry
Categories High-temperature air combustion
(High performance industrial furnace)
Technology Manufacture of DME
Overview Dimethylether (DME) is manufactured by the direct synthesis method employing the unused coke oven gas (COG) as material. Further, power is generated by the surplus gas (off gas) generated in the DME production process.
Company JFE Steel
Area Stationary generation source
SubArea Steel industry
Categories Manufacture of DME
Technology Power generation by use of heat waste
Overview Power is generated by recovering the exhaust heat from the cement manufacturing facility as a high temperature source. The heat of the preheater effluent gas (about 380℃) and clinker cooler effluent gas (about 250℃) is recovered by the exhaust heat recovery boiler, and power is generated by the steam turbine and power generator.
Company Kawasaki Plant Systems, Taiheiyo Cement Corporation
Area Stationary generation source
SubArea Cement manufacturing industry
Categories Power generation by use of heat waste
Technology Floating roof storage tank
Overview A floating roof is installed on the gasoline or naphthalene storage tank of an oil refinery. Or a vapor recovery facility is installed on the tank lorry outgoing facility, thereby preventing gasoline or naphthalene steam from being emitted and avoiding energy loss due to evaporation. This controls the emission of volatile organic compound (VOC) as a cause for generating photochemical oxidant.
Company Japan Energy Research Center
Yokohama Rubber (tank seal)
IPC (vapor recovery facility)
Area Stationary generation source
SubArea Petroleum product manufacturing industry
Categories Prevention of gasoline steam or others from emitting
Technology In-furnace desulfurization and water spray method
Overview Powder of desulfurization agent such as limestone, quick lime and Dolomite is blown directly into the boiler furnace. This is brought into contact with sulfur oxides (SOx) in the combustion gas and oxygen so that magnesium sulfide is generated. This reaction is used to immobilize the SOx. Limestone is blown in the furnace and water is sprayed from the cooling tower installed between the air heater and dust collector. The desulfurization rate is improved by the secondary desulfurization in the cooling tower.
The desulfurization rate according to this technique is about 80 percent. This facility is characterized by effective water saving and compact configuration.
Company Kawasaki Heavy Industries, Ltd.
Area Stationary generation source
SubArea Industries in general
Categories Simplified flue gas desulfurization
Technology Spray dryer method
Overview Alkali solution or slurry is sprayed into the absorption tower by an atomizer and is brought into contact with the effluent gas. The generated SOx-absorption substance (e.g., calcium sulfite) is dried by gas heat and reaction heat. The resultant powdered substance is caught by the dust collector located downstream. The absorbents used are exemplified by alkali such as sodium carbonate, sodium hydrogen carbonate and calcium hydroxide. The final product is a mixture of sulfate, sulfite and fisheye. This is normally subjected to landfill disposal.
Company Mitsubishi Heavy Industries, Ltd.
Area Stationary generation source
SubArea Industries in general
Categories Simplified flue gas desulfurization
Technology Simplified lime slurry absorption method
Overview This method cuts down the construction cost and running cost while making an active use of the characteristics of the conventional lime slurry absorption method. The desulfurization rate comes to 80%.
This technique is characterized by the following:
1) This is designed in a horizontal configuration in contrast to the vertical configuration of the conventional absorption tower, thereby cutting down the construction cost.
2) The gas speed in the absorption tower is 6 to 9 m/s. This speed is 2 to 3 times the conventional speed, thereby ensuring a compact configuration of the absorption tower.
3) The limestone is coarse grained so that its particle size is 150 m. This is intended to reduce the power consumption.
Company Babcock Hitachi
Area Stationary generation source
SubArea Industries in general
Categories Simplified flue gas desulfurization
Technology Stack built-in type
Overview In this simplified flue gas desulfurization system, the absorption tower and gypsum settling tank are built into part of the stack on the basis of the lime slurry absorption method.  This system is called a stack built-in system.  A liquid column type absorption tower also having a stack function is adopted.  The construction cost and operation cost are cut down by simplified processes.
Company Mitsubishi Heavy Industries, Ltd.
Area Stationary generation source
SubArea Industries in general
Categories Simplified flue gas desulfurization
Technology Briquetting machine
Overview Fuel for household use formed by adding biofuel and quick lime (desulfurization agent) to coal and molded under high pressure
Company Taiyo Tekko Co., Ltd.
Area Stationary generation source
SubArea Household
Categories Biobriquet

Other Environmental Technologies / Air quality

(Published in March, 2010. All rights reserved)

Cases

Year Case Sector Country
2011-2015 Co-benefits Type Air Conditioning System Using Solar Thermal Energy [PDF 109KB] Air Quality Indonesia
2012- Co-benefits Project for Low-carbon Society [PDF 140KB] Air Quality China
2013-2016(planned) Co-benefits Project for Environmental Pollution Control [PDF 122KB] Air Quality Mongolia

Tools

Evaluation Tools

Technical Guidelines / Air quality

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