Thermocouple for use in a hostile environment

Patent · Tue Oct 11 00:00:00 EDT 1988

OSTI ID:6635774

Najjar, M S; Leininger, T F

This patent describes a temperature monitoring system for a reactor having a refractory lined wall which defines a combustion chamber in which a carbonaceous fuel is gasified at a high temperature to produce a usable gas, and a residual slag comprising an amount of free metal therein, the combustion chamber refractory lined wall including means forming an access passage (16) with an opening at the combustion chamber, a multi-segment thermowell (32) removably registered in the access-passage (16) defining an annulus (38) therewith, having a closed end wall (36) disposed contiguous with the combustion chamber wall, and an open end, the thermowell (32) being comprised of discrete first (33), and second (34) cylindrical segments, each thereof being formed of a different refractory material, means forming a removable, gas tight closure (22) at the refractory lined wall adjacent the thermowell open end, a thermocouple (24) removably received in the thermowell and having thermocouple wires (26) and (27) which pass through the gas tight closure (22), and a gas conduit means (39) communicated with a pressurized source (41) of purge gas and opening into the thermowell (32) to envelop the thermocouple (24) with a flow of purge gas which exits into the combustion chamber (12).

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): US 4776705
• OSTI ID: 6635774
• Resource Relation: Patent File Date: Filed date 11 Jun 1987
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHEMICAL REACTORS
THERMOCOUPLES
COAL GASIFICATION
CLOSURES
COMBUSTION CHAMBERS
DESIGN
GAS FLOW
REFRACTORIES
TEMPERATURE MONITORING
THERMAL INSULATION
WIRES
FLUID FLOW
GASIFICATION
MEASURING INSTRUMENTS
MONITORING
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification