US 2026/0042965 A1Published application

Process plant with flexible heat integration scheme

AssigneeTopsoe A/S

InventorsAshwin Singh TENSINGH, Hemant Jagannath MAHAJAN

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Abstract

A thermal configuration for use during sulfidation and operation is disclosed which may involve multiple of the following heating steps, (a) heating a process feed by a charge heater, heating (b) a process feed stream or a recycle oil stream by heat exchange with a process effluent, heating (c) a process feed stream or a recycle oil stream by heat exchange with a said process feed after having been heated in the charge heater. Furthermore, the steps may be made independent by controlling the ratio of the streams directed to (b) or (c), controlling an amount of feed stream or recycle oil stream by-passed around the heating of (b) or (c) and controlling the temperature of step (a).

Claims14

Dependent claims

A process for thermal control of a chemical process plant with two reaction steps comprising the following process steps:

a. providing a first feed stream having a first mass flow and a second feed stream having a second mass flow,
b. heat exchanging the first feed stream as primary stream in a first heat exchanger, to provide a first heat exchanged feed stream,
c. heating the second feed stream as primary stream in a second heat exchanger, to provide a second heat exchanged feed stream,
d. combining the first heat exchanged feed stream and the second heat exchanged feed stream and directing this combined heat exchanged feed stream to a first reactor, to provide at the outlet of this first reactor an intermediate process stream,
e. directing the intermediate process stream to a charge heat exchanger having a heat exchange duty, to provide a first heat exchanged intermediate process stream,
f. directing the first heat exchanged intermediate process stream as secondary stream to said first heat exchanger, to provide a second heat exchanged intermediate process stream,
g. directing the second heat exchanged intermediate process stream to a second reactor, to provide at the outlet of this second reactor an effluent stream,
h. directing the effluent stream as secondary stream to said second heat exchanger to provide a heat exchanged effluent stream,
i. wherein the ratio between the first mass flow and the second mass flow is controllable, and wherein the heat exchange duty of the charge heat exchanger is controllable.

6 more elements

A process plant comprising

a feedstock inlet and a product outlet,
optionally, a third reactor comprising a catalyst and having an inlet and an outlet and
a second reactor comprising a catalyst and having an inlet and an outlet,
a first reactor having an inlet and an outlet,
a first means of heat exchange having a cold side inlet, a cold side outlet, a hot side inlet and a hot side outlet,
a second means of heat exchange having a cold side inlet, a cold side outlet, a hot side inlet and a hot side outlet,
a means of heating having an inlet and an outlet,
a first means of flow control having one inlet and at least two independently controllable outlets, in fluid communication with the cold side inlets of the first means of heat exchange and at least one of the cold side inlet of the second means of heat exchange and the inlet of the first reactor,
wherein the feedstock inlet is in fluid communication with the inlet of means of the first means of flow control, optionally through said third reactor,
wherein the cold side outlet of the first means of heat exchange and the cold side outlet of the second means of heat exchange are in fluid communication with the inlet of the first reactor,
wherein the outlet of the first reactor is in fluid communication not involving separation according to boiling point, with the inlet of the means of heating,
the outlet of the means of heating is in fluid communication not involving separation according to boiling point, with the hot side inlet of the second means of heat exchange,
the hot side outlet of the second means of heat exchange, is in fluid communication not involving separation according to boiling point, with the inlet of the second reactor,
and the outlet of the second reactor is in fluid communication with the hot side inlet of the first means of heat exchange,
and the hot side outlet of the first means of heat exchange is in fluid communication with the product outlet.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/102,527Filed 15 Aug 2023
Priority: EP 22190699.317 Aug 2022
Published: 12 Feb 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

C10G 45/72
Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds: controlling or regulating
B01J 8/001
Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes: controlling…
B01J 8/0457
In two or more cylindrical beds: the beds being placed in separate reactors
B01J 8/0492
The fluid passing successively through two or more beds: feeding reactive fluids

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