An eco-friendly activated carbon regeneration technologyutilizing superheated steam, enabling efficient use ofenvironmental resources and promoting sustainability.
What is superheated steam?
When the moisture present in steam is completely vaporized, the steam becomes dry steam (dry saturated steam) in a gaseous state above 100°C; when it is further heated beyond the saturation temperature, it is called superheated steam.
When the moisture present in steam is completely vaporized, the steam becomes dry steam (dry saturated steam) in a gaseous state above 100°C; when it is further heated beyond the saturation temperature, it is called superheated steam.
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01 Saturated steam (wet steam)
Steam in a gas–droplet mixed state.
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02 Heating
Completely vaporize the moisture present in steam (wet steam).
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03 Superheated steam (dry steam)
Steam heated beyond the saturation temperature.
Required heat
for generating superheated steam.* Superheated steam is a heat-transfer medium that contains more heat than heated air.
| temperature | Superheated steam | Heated air |
|---|---|---|
| 200˚C | 2,780kJ/kg | 208kJ/kg |
| 300˚C | 2,980kJ/kg | 312kJ/kg |
* Superheated steam is a heat-transfer medium that contains more heat than heated air.
Characteristics of superheated steam.
- Heat capacity is much larger than that of hot air.
- Rapidly heats the heated material (activated carbon), shortening heating time.
- At the same pressure, the transfer rate increases with temperature.
- About twice the specific heat at constant pressure compared to hot air → excellent heating performance.
- Enthalpy is very high due to latent heat → high energy retention.
Superheated steam with high energy efficiency.
Heat transfer by air is limited to convective heat transfer. In contrast, superheated steam involves combined heat-transfer action delivered by convective heat transfer, radiative heat transfer, and condensation heat transfer, so the thermal efficiency is significantly better.
Safe equipment with no fire risk.
The superheated-steam regeneration method can suppress oxidation and combustion of the heated material by heat-treating it under oxygen-free conditions (oxygen deficiency among the three elements of combustion).
Superheated-steam activated carbon regeneration.
- The inside of the regeneration tower and the activated carbon become high-temperature due to the superheated steam injected from the irradiation tube.
- Desorption and thermal decomposition of organics by continuous superheated steam injection.
- Irradiation tube
- Regeneration tower
- Activated carbon
Activated carbon pore
Based on extensive experience and outstanding technical capabilities, we provide the most efficient and economical optimal design and operation technologies through consulting, on-site diagnosis, and establishing improvement measures to remove hazardous gases (SOX, NOX, VOCs, dioxin, odors, etc.).
Regeneration process according to activated carbon temperature change after superheated steam injection
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100~200˚C
Thermal drying / moisture separation
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250˚C
Deacidification, desulfurization, bound moisture,CO₂ separation,Decomposition of H₂S compounds
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340˚C
Decomposition of fat-containing substances (decomposed into low-molecular aliphatic substances such as methane, etc.)
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380˚C
Decomposition of carbonization (pyrolysis) C-containing substances
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400˚C
Decomposition of substances with C–O and C–N bonds