Layout for inter-bed cooling in sulfuric acid plants
AssigneeHaldor TopsøE A/S
InventorsGeert Colding, Uffe Bach Thomsen
Life of this patent
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Abstract
In a converter for the catalytic oxidation of SO2 to SO3 in a sulfuric acid plant, which comprises a boiler section for the cooling of process gas between catalytic layers (beds), one or more water tube boilers (inter-bed boilers) having horizontal or slightly sloped tubes are used to cool the process gas between the catalytic layers (beds) in the converter. Each water tube boiler is provided with a process gas side bypass to control the temperature to the downstream catalyst layer.
Claims14
A converter comprising a converter shell for the catalytic oxidation of SO2 to SO3 in a sulfuric acid plant, said converter comprising a boiler section for the cooling of process gas between an upstream catalytic layer and a downstream catalytic layer,
- wherein the boiler section comprises one or more water tube boilers used to cool the process gas between the upstream catalytic layer and the downstream catalytic layer in the converter of the plant,
- wherein the converter further comprises a hot gas line attached to the upstream catalytic layer so that some process gas bypasses the boiler section, wherein the hot gas line is used to control the temperature of the downstream catalytic layer, and
- the converter further comprising a cooled process gas line from the boiler section, wherein a damper is located on the cooled process gas line and/or the hot gas line.
A converter comprising a converter shell for the catalytic oxidation of SO2 to SO3 in a sulfuric acid plant, said converter comprising a boiler section for the cooling of process gas between an upstream catalytic layer and a downstream catalytic layer,
- wherein the boiler section comprises one or more water tube boilers used to cool the process gas between the upstream catalytic layer and the downstream catalytic layer in the converter of the plant,
- wherein the converter further comprises a hot gas line attached to the upstream catalytic layer so that some process gas bypasses the boiler section, wherein the hot gas line is used to control the temperature of the downstream catalytic layer, and
- the converter further comprising a mixing point that receives the bypassed process gas from the hot gas line and cooled process gas from the boiler section, wherein the converter comprises a damper for the process gas going to the boiler section, said damper being located between an outlet of the upstream catalytic layer and an inlet to the boiler section.
Dependencies are inferred from the claim text.