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US 12,736,215 B2Granted
Induced drafting in process heaters
AssigneeSaudi Arabian Oil Company
InventorsMogib M. Alshahrani, Nasir Yasir N. Alqusair
Life of this patent
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Abstract
A method includes initiating operation of a heat source within a process heater for providing a heat load and generating heated flue gases, generating steam within a heat exchanger via the heated flue gases and cooling the heated flue gases into cooled flue gases, and inducing a draft within the process heater by injecting the steam through an ejector fluidly coupled to the process heater above or after the heat exchanger to receive the cooled flue gases.
Claims15
A system, comprising:
- a process heater housing defining a radiative heating section, a convective section above or after the radiative heating section, and a stack section above or after the convective section;
- a heat source disposed within the radiative heating section for providing a heat load to a process, the heat source being operable to generate heated flue gases;
- a heat exchanger mounted within the convective section above or after the heat source, the heat exchanger being operable to generate steam via the heated flue gases and thereby create cooled flue gases in the stack section;
- a steam line extending from the heat exchanger and operable to carry steam generated within the heat exchanger;
- and
- an ejector in fluid communication with both the steam line and stack section, the ejector including:
- an intake section including a vacuum intake in fluid communication with the stack section;
- and
- an intake nozzle in fluid communication with the steam line to increase a velocity of the steam received in the intake section, wherein the increased velocity of the steam generates a vacuum within the vacuum intake to induce a draft within the stack section.
6 more elements
A method, comprising:
- initiating operation of a heat source within a process heater for providing a heat load and generating heated flue gases;
- generating steam within a heat exchanger via the heated flue gases and cooling the heated flue gases into cooled flue gases;
- directing the steam through an ejector fluidly coupled to a stack section of the process heater above or after the heat exchanger;
- increasing a velocity of the steam through the ejector via an intake nozzle in an intake section of the ejector;
- and
- generating a vacuum, via the increased velocity of the steam, within a vacuum intake of the intake section in fluid communication with the stack section, thereby drawing the cooled flue gases from the stack section into the ejector to induce a draft within the process heater.
3 more elements
Dependencies are inferred from the claim text.