Wpływ nierównomiernego przepływu gazu przez rury katalityczne na parametry pracy reformera

• Autorzy: Gołębiowski, A. , Wróbel, W.

Warianty tytułu

EN

The effect of non-uniform gas flow through catalytic tubes on reformer working parameters

• Języki publikacji: PL

Abstrakty

EN

Hydrocarbon steam reforming is one of the most important processes of heavy chemical synthesis. High volume velocities and heat loads are used in modern reformers and working parameters of catalytic tubes are very hard. Life time of tubes depends on maximal wall temperature which is influenced mainly by: the catalyst activity, the gas purity and a non-uniformities in the gas flow. The effect of a non-uniform gas flow through catalytic tubes on reformer performance are presented. Catalysts used nowadays have very good and stable mechanical properties. Nevertheless, gas flow resistance grows gradually during the operation of the reformer. Most often the catalyst is damaged during shut-down operation when it undergoes the influence of strong forces caused by tube dilatation. We have made statistical analysis of resistance changes in individual tubes assuming that they are random and a total resistance of the reformer is calculated as an equivalent resistance of a system the tubes connected parallely. We calculated wall temperature increase caused by reduced gas flow using an appropriately modified program for reformer simulations. An analysis of operational data and of results of the simulations indicates that the differences in gas flow can cause wall temperature increase by about 20 degrees centigrade. In extreme cases, it can shorten tube life-time by a half.

Słowa kluczowe

PL

przepływ gazu; reformer

• Czasopismo: Zeszyty Naukowe. Chemia / Politechnika Śląska
• Rocznik: 2001
• Tom: z. 142
• Strony: 29-33
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Gołębiowski, A.

autor

Wróbel, W.

• Instytut Nawozów Sztucznych, Puławy