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Open Access Recovery of Energy Through Exhaust Gas Condensation: A Profitable Idea

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Cimo SA, a company situated on the chemical site of Monthey, Switzerland, runs the thermal power station providing steam and part of the electricity required for the various production buildings of Ciba Specialty Chemicals and Novartis Crop Protection.

The boiler house includes several units; the main ones, Nos. 4 and 5, are used alternately:

– boiler No. 4, nominal capacity of 80 t/h is used mainly in summer;

– boiler No. 5, object of the present project, has a nominal rating of 160 t/h at 115 bar and 525 °C. This unit is used in winter when steam demands vary between 60 and 110 t/h.

The two boilers, equipped with back-pressure turbines, are fitted with burners for natural gas and fuel oil, gas being the main fuel (95%). The low-pressure steam is then used in the various production facilities without any return of condensate to the station. Because of this fact, the feed-water of the boilers is therefore demineralised water, which must be pre-heated by low-pressure steam before being degassed. This pre-heating represents an important part of the total energy consumption.
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Document Type: Research Article

Publication date: September 1, 2000

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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