초록 ▼

A thermowell for a fixed-bed reactor which has a vertical spine portion, and multiple spider portions spaced along the spine portion. At least one thermocouple and preferable a plurality of thermocouples are located in each arm of the spider portions with thermocouple leads extending upwardly throug

A thermowell for a fixed-bed reactor which has a vertical spine portion, and multiple spider portions spaced along the spine portion. At least one thermocouple and preferable a plurality of thermocouples are located in each arm of the spider portions with thermocouple leads extending upwardly through the spine portion to a monitor outside of the reactor. The thermowell is constructed in the reactor while loading the catalyst by first positioning the spine portion in the reactor, and then fabricating a spider portion at the lowermost level of the spine portion with at least one thermocouple in each arm of the spider portion and thermocouple leads extending through the arms and upwardly through the spine portion. Catalyst is then added to the reactor to cover the spider portion at the lowermost level. At each successive level, repeating the steps of fabricating another spider portion, and of adding catalyst to cover the spider portion.

대표청구항 ▼

A system for monitoring temperatures in an elongated fixed-bed catalytic reactor having a diameter sufficiently large to accommodate personnel during catalyst loading and a manway to provide personnel access to the reactor for assembling a multi-level thermowell therein during catalyst loading, said

A system for monitoring temperatures in an elongated fixed-bed catalytic reactor having a diameter sufficiently large to accommodate personnel during catalyst loading and a manway to provide personnel access to the reactor for assembling a multi-level thermowell therein during catalyst loading, said system comprising: a central thermal sensor conduit of said thermowell extending vertically within a bed of catalyst in said reactor; a plurality of arrays of lateral thermal sensor conduits of said thermowell within the bed of catalyst and spaced along said central conduit, each one of said arrays being formed by its respective lateral conduits extending outwardly from said central conduit such that the bed of catalyst provides structural support for said thermowell; at least one thermal sensor in each of said lateral conduits; means outside of said reactor for monitoring said thermal sensors; a thermowell inlet formed in said reactor; and a plurality o thermal sensor leads connected to said thermal sensors and extending upwardly through said central conduit and out said thermowell inlet to said monitoring means.