Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including heat exchanger for reaction chamber or reactants...
Patent
1996-07-17
1998-12-22
Yoon, Tae
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including heat exchanger for reaction chamber or reactants...
48 61, 48 68, 48101, 48113, 48 62R, 110229, F28D 2100, F22B 3700, F23J 102
Patent
active
058514970
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The production of a synthesis gas in a conventional gasifier usually embodies the partial oxidation of a fuel mixture at a relatively high temperature. The resulting products of combustion include the desired synthesis gas, together with an amount of uncombusted effluent.
When the fuel mixture is comprised of a solid material such as coke or coal grounds, the composition of the coke or coal can be such that varying amounts will not be combusted and will be passed through the gasifier and remain as a solid. While a considerable amount of the solid effluent components will be carried into the gasifier quench chamber, at least a part of said solid effluent will be retained on the gasifier walls and form a slag. When in a hot plastic state, the slag will gradually flow down to the gasifier quenching bath, or eventually solidify when the gasifier is closed down and the temperature is reduced.
At some point in the synthetic gas production process, it will be apparent that the presence of an excessive amount of slag within the gasifier is impeding the gasification process. At such time, the gasifier is manually shut down for the specific purpose of melting the slag or of effectuating a deslagging operation.
Such an operation is comprised basically of introducing a combustible mixture to the gasifier's combustion chamber such that when a sufficient elevated temperature is reached, the slag will melt and by gravity flow pass into a quench bath.
One detriment to this procedure becomes apparent, particularly when the partially combusted mixture includes an amount of vanadium in its composition. The subsequent deslagging operation will be impaired by this element's presence most often resulting in damage to the gasifier constricted throat at a greater rate than the rest of the gasifier refractory. The latter will tend to be physically eroded or corroded away by the accumulation of slag about this narrowed portion of the effluent flow path and the thermal shock to which it is often subjected.
Stated briefly, it is therefore, an object of the invention to provide a novel gasifier throat structure which includes a cooling system embodying a circulating medium.
SUMMARY OF THE INVENTION
Toward overcoming a major fault in a gasifier deslagging process, there is presently provided a novel throat section which is capable of resisting the effects of high temperatures and thermal shock, factors which often result in subsequent erosion of the throat. The hereinafter described gasifier throat is comprised primarily of a refractory material capable of withstanding exposure to the normally high temperatures achieved during the gasification process.
The throat, however, is provided with an internal cooling system comprised of a network or a supporting frame of interconnected pipes and/or tubes which carry a liquid cooling medium through the throat. The liquid coolant will be most effective in its cooling function, particularly at the effluent contacting throat face.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional elevation view of a gasifier.
FIG. 2 is an enlarged segmentary view of FIG. 1.
FIG. 3 is a segmentary view of the throat section's internal support and cooling structure.
FIG. 4 is a segmentary view of FIG. 3.
DESCRIPTION OF THE INVENTION
Referring to FIG. 1, a gasifier 10 of the type contemplated is shown which is comprised essentially of an elongated shell 11 having a refractory liner 12 of fire brick or he like, which forms combustion chamber 13 in which partial combustion of an injected fuel mixture takes place.
The upper end of the gasifier is provided for partial oxidation or a deslagging operation with an opening which positions a burner 14. The latter in one embodiment is communicated through one or more valved conduits, such as 16 and 17, to a pressurized source 18 of a fuel or a fuel mixture. The fuel can, for example, comprise particulated coal or coke together with a combustion supporting gas such as oxygen and/or other additives.
The lower
REFERENCES:
patent: 4218423 (1980-08-01), Robin et al.
patent: 4533363 (1985-08-01), Jahnke et al.
patent: 4948387 (1990-08-01), Martin
patent: 5464592 (1995-11-01), Brooker et al.
Brooker Donald Duane
Falsetti James Samuel
Vuong Dinh-Cuong
Wolfenbarger James Kenneth
Gibson Henry H.
Texaco Inc.
Yoon Tae
LandOfFree
Gasifier throat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gasifier throat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gasifier throat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2043177