Systems and methods for Utilizing flue gas
AssigneeSuncoke Technology and Development LLC
InventorsJohn Francis Quanci, Anthony Hanlin, Jennifer McLaren
Life of this patent
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Abstract
Systems and apparatuses for cooling flue gases emitted from an industrial facility, such as a coke oven in a coke manufacturing plant. A representative system includes a heat recovery steam generator (HRSG) having a steam generation system that converts liquid feedwater into steam by absorbing heat from the flue gases. The steam generation system includes a plurality of tubes that carry the liquid water feedwater and the steam. Some or all of the tubes include steel and a non-corrosive material cladded to the steel that helps to reduce corrosion caused by the high temperature flue gases and extremely corrosive contaminants within the flue gas that can corrode steel.
Claims21
A heat recovery steam generator (HRSG) configured to receive flue gases, the HRSG comprising:
- an inlet duct positioned at a first end of the HRSG and configured to receive the flue gases;
- an outlet duct positioned at a second end of the HRSG, wherein the flue gases are configured to flow through the HRSG by flowing from the inlet duct to the outlet duct;
- and
- a steam generation system fluidly isolated from the flue gases flowing through the HRSG, wherein the steam generation system comprises:
- at least one economizer configured to receive liquid water at a first temperature, wherein the at least one economizer includes a plurality of economizer tubes through which the liquid water flows, wherein the flue gases flowing through the HRSG heat the liquid water within the plurality of economizer tubes from the first temperature to a second temperature greater than the first temperature;
- at least one evaporator configured to receive the liquid water at the second temperature from the at least one economizer, wherein the at least one evaporator includes a plurality of evaporator tubes through which the liquid water flows, wherein the flue gases flowing through the HRSG heat the liquid water within the plurality of evaporator tubes until the liquid water evaporates into steam, and wherein at least a portion of individual ones of the plurality of evaporator tubes comprise a base material including steel, and a cladding material that is resistant to corrosion at high temperatures and disposed over the base material, wherein the cladding material comprises a metal alloy ad forms an outermost layer of the individual ones of the plurality of evaporator tubes.
A heat recovery steam generator (HRSG) configured to receive flue gases, the HRSG comprising:
- a steam generation system comprising:
- an economizer configured to receive a fluid at a first temperature and including economizer tubes through which the fluid flows, wherein the flue gases flowing through the HRSG heat the fluid within the economizer tubes from the first temperature to a second temperature greater than the first temperature;
- an evaporator configured to receive the fluid at the second temperature from the economizer, wherein the evaporator includes a plurality of evaporator tubes through which the fluid flows, wherein the flue gases flowing through the HRSG heat the fluid within the evaporator tubes until the fluid evaporates, wherein at least a portion of the evaporator tubes comprise a base material including steel, and a cladding material that is resistant to corrosion at high temperatures and disposed over the base material, wherein the cladding material comprises a metal alloy and forms an outermost layer of the portion of the evaporator tubes.
Dependencies are inferred from the claim text.