Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1983-01-20
1984-10-23
Straub, Gary p.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
422160, 165134DP, 165 1, 165103, 423531, C01B 1790, B22B 1900
Patent
active
044788096
ABSTRACT:
This invention provides a method of removing heat from the process gas in a sulfuric acid plant having interpass and final absorption towers by indirect heat exchange with a liquid without condensing acidic vapors from said process gas. The method comprises installing first and second economizers, the second economizer having first and second sections for liquid flow. The process gas flow through the first economizer before passing through the interpass absorption tower and through the second economizer before passing through the final absorption tower. A liquid flows through the first and second economizers for indirect heat exchange with the process gas, the liquid passing sequentially through the second section of the second economizer, the first economizer, and the first section of the second economizer. The second section of the second economizer is used to preheat the liquid before the liquid enters the first economizer to prevent any portion of the first economizer from cooling to the dew point of the vapors, thus preventing condensation of vapor, and to increase the heat removed from the process gas.
REFERENCES:
patent: 3194214 (1965-07-01), Frendberg
patent: 4318366 (1982-03-01), Tompkins
Browder, T. J., Improvements in Sulfuric Acid Process _C.E.P.; Mar. 1977; pp. 70-76.
McAlister Donald R.
Ziebold Steven A.
Limpus Lawrence L.
Monsanto Company
Straub Gary P.
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