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US 2009/0264692 A1Published application
Use of Direct Heating Device with a Reheater in a Dehydrogenation Unit
AssigneeFina Technologies, Inc.
InventorsVincent A. Welch, Slawomir A. Oleksy
Life of this patent
Estimating the term…
Abstract
Methods and processes for increasing the efficiency and/or expanding the capacity of a dehydrogenation unit by use of at least one direct heating unit are described.
Claims19
A method for increasing the efficiency and/or expanding the capacity of a new or existing dehydrogenation unit, comprising:
- providing at least one dehydrogenation reactor and a feed stream;
- adding at least one direct heating unit (DHU) to a new or existing dehydrogenation unit having a reheater, whereby the DHU and reheater are positioned before or after at least one reactor, and wherein the DHU and reheater are operated in parallel arrangement with respect to each other;
- diverting between 0.5% and 85% of a reactor effluent from the reactor to the DHU for heating and feeding the remainder of the reactor effluent to the reheater for heating;
- feeding the heated streams from the DHU and the reheater to a subsequent reactor, wherein there is an energy savings for operating the new or existing dehydrogenation unit with an added DHU as compared to operating a dehydrogenation unit with only a reheater and no added DHU.
1 more element
A method for increasing the efficiency and/or expanding the capacity of a new or existing dehydrogenation unit, comprising:
- providing at least one dehydrogenation reactor and a feed stream;
- adding at least one reheater and at least one direct heating unit (DHU) to a new or existing dehydrogenation unit, whereby the DHU and reheater are positioned before or after at least one reactor, and wherein the DHU and reheater are in parallel arrangement with respect to each other;
- diverting between 0.5% and 85% of a reactor effluent from the reactor to the DHU for heating and feeding the remainder of the reactor effluent to the reheater for heating;
- and
- feeding the heated streams from the DHU and the reheater to a subsequent reactor, wherein there is an energy savings for operating the new or existing dehydrogenation unit as compared to operating a dehydrogenation unit without an added DHU and added reheater.
2 more elements
A method for increasing the efficiency and/or expanding the capacity of a new or existing dehydrogenation unit, comprising:
- providing at least one dehydrogenation reactor and a feed stream;
- adding at least one reheater and at least one direct heating unit (DHU) to a new or existing dehydrogenation unit, whereby the DHU and reheater are positioned before or after at least one reactor, and wherein the DHU and reheater are in series arrangement with respect to each other;
- diverting between 0.5% and 85% of a reactor effluent from the reactor to the DHU for heating and feeding the remainder of the reactor effluent to the reheater for heating;
- and
- feeding the heated streams from the DHU and the reheater to a subsequent reactor, wherein there is an energy savings for operating the new or existing dehydrogenation unit as compared to operating a dehydrogenation unit without an added DHU and added reheater.
2 more elements
Dependencies are inferred from the claim text.