Method for sealing leakage across valves in a sulfur recovery pl

Details Method for sealing leakage across valves in a sulfur recovery pl Method for sealing leakage across valves in a sulfur recovery pl

1977-11-07

1978-11-07

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423576, 252411S, 422169, C01B 1704

Patent

active

041246969

ABSTRACT:
An improved method for reducing the sulfur losses associated with leakage across closed valves in a Claus type sulfur recovery plant involving the recirculating of low sulfur content Claus tail gas to the high pressure side of the closed valves. This improved method for compensating for leakage across a closed valve is particularly useful in sealing a valve in the so-called Cold Bed Adsorption plant. Thus, allowing a conventional carbon steel valve of an undercut design to be used at a temperature range from under 250.degree. F to over 650.degree. F while meeting contemporary emission standards.

REFERENCES:
patent: 4035474 (1977-07-01), Kunkel et al.
patent: 4051226 (1977-09-01), Staudinger et al.
Nobles, J. E.; "Design & Operation of First Amoco CBA Unit," paper presented, Mar. 1977; Univ. Oklahoma.

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