摘要:
Die Erfindung betrifft ein Verbindungsstück zwischen einem Spaltrohr (1) eines Spaltofens und einem Kühlrohr (2) eines Spaltgaskühlers. Dabei ist das Kühlrohr (2) als Doppelrohr mit einem in der Verlängerung des Spaltrohres (1) angeordneten Innenrohr (3) und einem das Innenrohr (3) unter Bildung eines Kühlzwischenraumes (5) umschließenden Außenrohr (4) ausgebildet. Der Kühlzwischenraum (5)ist mit einer Zuführungskammer (6) zur Zuführung eines Kühlmediums verbunden. Weiterhin ist mit dem Spaltrohr (1) ein Übergangsstück (14) verbunden, dessen Endabschnitt gabelförmig ausgebildet ist und einen Innenabschnitt (15) und einen Außenabschnitt (16) aufweist, zwischen denen eine Schicht aus einem wärmeisolierenden Material (17) eingebracht ist. Die Zuführungskammer (6) ist mit dem Übergangstück (14) als eine Einheit ausgebildet. Die Einheit ist vorgefertigt und schließt Halbschalen (18, 19) ein. In die Zuführungskammer (6) ist ein Innenrohrabschnitt (13) eingeschweißt, der aus der Zuführungskammer (6) herausragt und mit dem Innenabschnitt (15) des Übergangsstückes (14) fluchtet. Ein Verfahren zur Herstellung eines solchen Verbindungsstücks ist angegeben.
摘要:
A process and apparatus are provided to produce acetylene from a feed stream of low hydrogen content hydrocarbons such as coal by: (a) blending the hydrocarbons with methane to provide a blended mixture containing at least about 12.5 wt% atomic hydrogen; (b) partially combusting the blended mixture in a reactor in the presence of a source of oxygen to provide a partially combusted mixture at or above a temperature sufficient to produce methyl radicals; (c) maintaining the partially combusted mixture at or above the temperature for a residence time sufficient to produce a product stream containing enhanced yields of acetylene without significant formation of coke or coke precursors; (d) cooling the product stream to reduce the temperature of the product stream within a time sufficiently brief to substantially arrest any cracking reactions and provide a cooled product stream; and (e) recovering acetylene from the cooled product stream. The acetylene can be converted to ethylene by a conventional hydrogenation process.
摘要:
Apparatus and process for compressing and quenching a cracked gas stream from a hydrocarbon cracking furnace (30) including the step of feeding furnace output directly into an ejector (20) in the effluent line the ejector acting to quench and compress the effluent by injection of pressurised motive fluid into the ejector thereby rapidly mixing the motive fluid with the effluent for quick quenching and compression to prevent coke build-up and allow efficient heat exchanger and low pressure furnace operation. Aparatus utilising primary and secondary ejectors is also disclosed.
摘要:
A composite heat insulating lining includes an upper lining and a lower lining. The upper lining and the lower lining each include an inorganic fiber prefabricated layer, and the inorganic fiber prefabricated layer is configured to reduce the heat conductivity of the lining, thereby reducing heat loss. In addition, existing inorganic fiber materials are generally not resistant to high temperature. The composite heat insulating lining provided according to the present application is provided with a refractory coating on a surface of the inorganic fiber prefabricated layer to avoid direct heating of the inorganic fiber prefabricated layer, thereby avoiding high temperature damage to the inorganic fiber prefabricated layer, and improving the service life of the composite heat insulating lining. An ethylene cracking furnace is further provided according to the present application, which includes any one of the above composite heat insulating linings.
摘要:
A high-rate hydrothermal cleanup (HCU) process and system is disclosed for the rapid hydrolysis of renewable oils and reduction of inorganic and organic contaminants, such as salts, minerals, metals, asphaltenes, polymers, and coke precursors in both renewable oils and petroleum fractions. The process and system is characterized by a very short residence time, high-temperature, high-pressure, turbulent flow, hydrothermal operation. The HCU and integrated vapor-liquid separation system and process results in high yields of oil product that contains significantly reduced concentrations of inorganic and organic contaminants. The process may be operated to produce a concentrated clean glycerin byproduct and short-chain and long-chain free fatty acid product streams. The integrated vapor-liquid separation system and process performs at near atmospheric pressure by taking advantage of the water employed in the cleanup process and the energy imparted by the HCU reactor and eliminates the need for vacuum distillation.