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Energy Saving

Energy-saving Technologies We have Worked on

In 1970, we built Japan’s first energy-saving industrial furnace lined with ceramic fiber blanket, since then, we have been promoting energy saving in the industrial furnaces, developing new combustion and waste heat recovery technologies one after another.

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Factors as object of energy saving are roughly summarized as the following 3 items.

  • Furnace body design
    (downsizing, strengthened insulating, reduction of miscellaneous losses such as cooling water loss, etc.)
  • Waste heat recovery
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  • Combustion control
    (air-fuel ratio control, furnace pressure control, optimization of heating curve, etc.)

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Minimized furnace body reduces furnace surface area by 25%, achieving energy and installation space savings.

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Example of furnace body designiphone7 chanel

Highly-insulated Furnace Body

Weight-saving of lining materials has reduced both inertia heat loss and furnace shell radiation heat loss dramatically.

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Typical ceramic fiber block

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Conventional refractory

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Reduction of Cooling Water Heat Loss

Renovation to highly-insulated refractory constitution has reduced cooling water heat loss by 30%. Not only that, we have eliminated cooling water heat loss from large ingot reheating furnace for free forging by making the lintel to be waterless design.

Fully waterless-designed large reheating furnace for forging
Fully waterless-designed large reheating furnace for forging
Strengthened insulation of skids in continuous reheating furnace
Strengthened insulation of skids in continuous reheating furnace

Example of Waste Heat Recovery

Self-recuperative burners have less heat loss compared to the conventional central recuperator, thanks to this burner design, we have achieved approximately 15% of energy saving in car bottom heat treatment furnaces.
Our patented multi-port regenerative burner system is excellent in temperature uniformity in the furnace chamber because of distributed flame patterns. Combine with our own air-fuel ratio control technology per each individual burner, we can expect stable and energy-saving effect.

Waste gas recovery
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Patented multi-port regenerative burner
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Heat treatment furnaces with recuperative gas burner

Combustion Control (air-fuel ratio control, furnace pressure control, optimization of heating curve, etc.)

Air-fuel Ratio Control Technology

Our original air-fuel ratio control technology per each individual burner is a control system that can adjust individual burner combustion in response to the every changing situation. Particularly, in regenerative burner control, it can reduce oxygen level in the furnace as well as power consumptions of combustion air blower and exhaust induced draft fan.

Energy Saving by Optimization of Heating Curve

Our new On/Off control has a functionality to minimize the deviation between heating curve and process temperatures, and can improve uselessness and unreasonableness in burner combustion by its automated function to change control zone partitioning.

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