SUMITOMO METAL MINING ENGINEERING CO., LTD.

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Greenhouse Gas (N20) Treatment Equipment
Currently, global warming is causing serious problems including abnormal climatic conditions and changes in the eco system.
Thus, reduction of greenhouse gas emissions such as carbon dioxide is an urgent objective for the global environment. In 1997, The 3rd Session of the Conference of the Parties (COP3) was held within [The 3rd United Nations Framework Convention on Climate Change (UNFCCC)] in Kyoto.
Agreement was reached to accept the concrete objectives of the Kyoto Protocol, which include numerical targets on the reduction of greenhouse gas proposed by developed countries, and methods of achieving these objectives.
We supply innovative, highly efficient low-cost equipment to chemical plants worldwide (plants producing nitric acid, adipic acid and caprolactam) to treat exhaust gas emitted from plants including N2O (global warming coefficient 310) designated as a greenhouse gas in the Kyoto Protocol.

N2O decomposer installed at fertilizer plant in China


Regenerative Catalytic Decomposition System
This is an integrated system comprising a regenerative thermal oxidation type deodorizer (employed in many industrial sectors including chemical plants and printing plants) and an N2O decomposition catalyst. The exhaust gas is heated to catalytic reaction temperature in a preheated heat sink media made of ceramics. In two sections of the catalyst installed in the subsequent stage thermal decomposition of N2O occurs. Between two sections of catalysts (in a combustion chamber), the exhaust gas is heated by burners to maintain the temperature of the catalytic layers. After this, the exhaust gas passes through another heat sink media made. And then the exhaust gas heat is radiated into it.
By switching over the intake line and discharge line of the exhaust gas at predetermined intervals, the heat sink media alternates between heat absorption and heat discharge.
Using this method, the thermal recovery can be raised to 95%, and this enables major decreases in fuel consumption and CO2 emission. Both the heat sink media and the catalyst employ a honeycomb structure, and so pressure loss is low and the reaction efficiency is high, a long service life can be also expected.

Features
1. Over 90% high efficiency N2O decomposition
2. Heat exchange system with high efficiency of 95%
3. Space-saving (rotary valve type)
4. Absence of secondary pollution


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SUMITOMO METAL MINING ENGINEERING CO., LTD.