Process For Heating A Hydrocarbon Stream Entering A Reaction Zone With A Heater Convection Section

a technology of hydrocarbon stream and heater, which is applied in the direction of catalytic naphtha reforming, naphtha treatment, and thermal naphtha reforming, can solve the problems of insufficient heat generation of combined feed stream to the desired inlet temperature of the first reactor, and the combined feed stream often requires additional heating, so as to reduce the capital and catalyst cost, increase yield, and reduce the effect of capital cos

Inactive Publication Date: 2008-05-15
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023]Desirably, using the convection section of one or more heaters to heat the feed to one reactor and setting the inlet temperatures of the reactors, it is possible to replace a radiant section of a heater or furnace with a convection section. This can reduce the capital and catalyst cost, and fuel and flue gas flow at the same time, so the emissions from the unit (e.g., CO2, SOX, NOX) may also be reduced. Also, utilizing

Problems solved by technology

The heating of the combined feed stream that occurs in the combined feed heat exchanger is generally, however, insufficient to heat the combined feed stream to the desired inlet temperature of the first reactor.
Consequently, after exiting the combined feed heat exchanger and prior to entering the first reactor, the combined feed stream often requires additional heating.
A flat profile could result in imbalance of the operating duties of the heaters in the train, if some of the operating variables

Method used

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  • Process For Heating A Hydrocarbon Stream Entering A Reaction Zone With A Heater Convection Section
  • Process For Heating A Hydrocarbon Stream Entering A Reaction Zone With A Heater Convection Section
  • Process For Heating A Hydrocarbon Stream Entering A Reaction Zone With A Heater Convection Section

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Embodiment Construction

[0035]Generally, the embodiments disclosed herein are applicable to multiple reaction systems with multiple heaters, such as various hydrocarbon conversion processes, including those that are exothermic and endothermic. As an example, the embodiments of the invention could be applicable for an exothermic process with multiple reaction zones where an ascending temperature profile would be desirable. Preferably, the embodiments disclosed herein are applicable for endothermic reforming processes.

[0036]Generally, a hydrocarbon feedstock that is charged for a reforming process includes naphthenes and paraffins that boil within the gasoline range. The preferred charge stocks are naphthas consisting principally of naphthenes and paraffins, although, in many cases, aromatics also can be present. This preferred class includes straight-run gasolines, natural gasolines, synthetic gasolines, and the like. As an alternative embodiment, it is frequently advantageous to charge thermally or catalyt...

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Abstract

An exemplary process can include passing a hydrocarbon stream through a reforming unit. The reforming unit may include a heater, which in turn generally includes a convection section and a radiant section, and a plurality of reforming reaction zones. Generally, the hydrocarbon stream is heated in the convection section for reacting in one of the reforming reaction zones to which the hydrocarbon stream is sent and the hydrocarbon stream is heated in the radiant section of the heater for reacting in the other reforming reaction zone to which the hydrocarbon stream is sent.

Description

FIELD OF THE INVENTION[0001]The field of this invention is heating a hydrocarbon stream entering a reaction zone.BACKGROUND OF THE INVENTION[0002]Hydrocarbon conversion processes that are exothermic or endothermic can be employed in the petroleum refining or petrochemical production industry. An exemplary hydrocarbon conversion process for improving the octane quality of hydrocarbon feedstocks is catalytic reforming where the primary product of reforming being motor gasoline or a source of aromatics for petrochemicals. The art of catalytic reforming is well known and a brief detailed description is provided below.[0003]Generally, in catalytic reforming, a feedstock is admixed with a recycle stream comprising hydrogen to form what is commonly referred to as a combined feed stream, and the combined feed stream is contacted with a catalyst in a reaction zone. The usual feedstock for catalytic reforming is a petroleum fraction known as naphtha and having an initial boiling point of abou...

Claims

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Application Information

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IPC IPC(8): C10G69/08
CPCC10G59/02C10G35/02
Inventor YUAN, LEONFECTEAU, DAVID J.HARTMAN, WILLIAM M.SCHLUETER, WILLIAM D.
Owner UOP LLC
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