Failure of a heat exchanger generated by an excess of SO2 and H2S in the Sulfur Recovery Unit of a petroleum refinery

Lins, Vanessa de Freitas Cunha; Guimarães, Eliane Marina Palhares

doi:10.1016/j.jlp.2006.10.007

Cited by 29 publications

(13 citation statements)

References 4 publications

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“…TSWEET uses three unit operations (main burner, 1st pass WHB, 2nd pass WHB) to model the burner/waste heat boiler [10,13]. The burner unit operation simulates the combustion of the acid gas, with COS and CS 2 formation calculated by NSER 1993 correlation [3].…”

Section: Methodsmentioning

confidence: 99%

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An investigation of reaction furnace temperatures and sulfur recovery

Asadi

Pakizeh

Chenar

2011

Front. Chem. Sci. Eng.

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In a modern day sulfur recovery unit (SRU), hydrogen sulfide (H 2 S) is converted to elemental sulfur using a modified Claus unit. A process simulator called TSWEET has been used to consider the Claus process. The effect of the H 2 S concentration, the H 2 S/CO 2 ratio, the input air flow rate, the acid gas flow of the acid gas (AG) splitter and the temperature of the acid gas feed at three different oxygen concentrations (in the air input) on the main burner temperature have been studied. Also the effects of the tail gas ratio and the catalytic bed type on the sulfur recovery were studied. The bed temperatures were optimized in order to enhance the sulfur recovery for a given acid gas feed and air input. Initially when the fraction of AG splitter flow to the main burner was increased, the temperature of the main burner increased to a maximum but then decreased sharply when the flow fraction was further increased; this was true for all three concentrations of oxygen. However, if three other parameters (the concentration of H 2 S, the ratio H 2 S/CO 2 and the flow rate of air) were increased, the temperature of the main burner increased monotonically. This increase had different slopes depending on the oxygen concentration in the input air. But, by increasing the temperature of the acid gas feed, the temperature of the main burner decreased. In general, the concentration of oxygen in the input air into the Claus unit had little effect on the temperature of the main burner (This is true for all parameters). The optimal catalytic bed temperature, tail gas ratio and type of catalytic bed were also determined and these conditions are a minimum temperature of 300°C, a ratio of 2.0 and a hydrolysing Claus bed.

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Section: Methodsmentioning

confidence: 99%

“…Changing the number and type of beds in the rich acid gas feed, increases the sulfur recovery from 96.1% to 99.3%. For a lean acid gas feed, using modifications such as acid gas bypass and oxygen enrichment of the acid gas bypass causes sulfur recovery to increase from 96.1% to 96.6% [9,10].…”

Section: Introductionmentioning

confidence: 99%

An investigation of reaction furnace temperatures and sulfur recovery

Asadi

Pakizeh

Chenar

2011

Front. Chem. Sci. Eng.

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“…TSWEET assumes that the Claus beds operate at equilibrium conversions equal to 95% and it also assumes 4 lb of sulfur/100 lb moles of gas are entrained in the sulfur condensers [10]. This simulator uses three unit operations (main burner, 1 st pass WHB, 2 nd pass WHB) to model the burner/waste heat boiler [10,11]. The burner unit operation simulates the combustion of acid gas, with COS and CS 2 formation being calculated by NSER 1993 correlation [12].…”

Section: Journal Of Chemical Engineering and Process Technologymentioning

confidence: 99%

Effect of O2 Concentration on the Reaction Furnace Temperature and Sulfur Recovery Using a TSWEET® Process Simulator

Asadi¹

2013

J Chem Eng Process Technol

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In the present study, effect of a parameter for increasing the reaction furnace temperature and sulfur recovery of Claus sulfur recovery units (SRUs) is investigated by TSWEET process simulator based on Gibbs free minimization. The effect of oxygen enrichment on the reaction furnace temperature and sulfur recovery has been studied by proposed simulator. In the case of the effect of O 2 concentration, temperature of main burner increased monotonically. It is found that sulfur recovery (in the O 2 high concentrations) increases up to a maximum value and then decreases with increase of O 2 concentration, while this is not the case for O 2 low concentrations.

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“…The abrasion loss should be less than 4 wt% of the total loaded catalyst. The corrosion problems are addressed elsewhere [8][9][10][11].…”

Section: Mechanical Strength and Attrition Resistance Of Claus Catalystsmentioning

confidence: 99%

An investigation on the most important influencing parameters regarding the selection of the proper catalysts for Claus SRU converters

ZareNezhad

2009

Journal of Industrial and Engineering Chemistry

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Failure of a heat exchanger generated by an excess of SO2 and H2S in the Sulfur Recovery Unit of a petroleum refinery

Cited by 29 publications

References 4 publications

An investigation of reaction furnace temperatures and sulfur recovery

An investigation of reaction furnace temperatures and sulfur recovery

Effect of O2 Concentration on the Reaction Furnace Temperature and Sulfur Recovery Using a TSWEET® Process Simulator

An investigation on the most important influencing parameters regarding the selection of the proper catalysts for Claus SRU converters

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