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Heat Recovery from Rotary Kilns

Low grade heat capture for the cement industry

March 2019
Gallery Heat Recovery from Rotary Kilns 1
Gallery Heat Recovery from Rotary Kilns 1


A heat recovery system that captures heat lost from rotary kiln surfaces in cement, paper and sponge iron plants and putting it to useful work.

The outside surface temperature of the kiln ranges from 200-300°C. The solution captures the heat lost to ambient during raw material calcination which takes place at 1200°C. The concept utilizes heat recovery panels placed parallel to the kiln. The heat recovery panels are made of aluminium with copper pipes embedded in them. As the panel temperature is lower than the kiln surface temperature, the heat radiated by the kiln surface is captured by the panels and finally transferred to the heat transfer fluid circulating in the copper pipes. The heat captures using this solution are low grade heat between 90-110°C.

Label Date March 28, 2019
From India
Maturity stage Initial market commercialization
Looking For Visibility, partners

The environmental benefits

  • Converts waste heat into useful energy.
  • Lowers the specific energy consumed per unit of cement, paper or iron produced.

The Financial benefits

  • Captures 2.5-5% of heat lost which reduces overall input costs.

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile

Oorja Energy Engineering Services

Manufacturer of cleantech heating and cooling systems for industrial, commercial and military sectors.

View company profile
Headquarters Telangana 501301, India
Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Oorja Energy Engineering Services has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.