Gas: heating and illuminating – Generators – Retort
Reexamination Certificate
1998-01-02
2001-03-27
Tran, Hien (Department: 1764)
Gas: heating and illuminating
Generators
Retort
C048S101000, C202S211000, C201S019000, C201S027000, C201S029000, C201S045000, C373S115000, C502S005000, C502S055000
Reexamination Certificate
active
06206941
ABSTRACT:
FIELD OF THE INVENTION
THis invention relates to apparatus and process for the creation of activated carbon, and more particularly, to an apparatus and process for the creation of activated carbon not only from spent activated carbon which usually is electrically conductive but also from carbonaceous raw materials such as coconut shells, wood chips, saw dust, and coal products which usually are not electrically conductive.
BACKGROUND OF THE INVENTION
Today carbon is activated from materials such as coconut shell char, and reactivated from materials such as spent or exhausted petroleum coke saturated by exposure to gasoline vapors, by electrical resistance heating in the presence of steam. The conversion of carbonaceous raw materials such as coconut shells, wood chips, saw dust and coal products, by the same apparatus and process is precluded because the carbonaceous materials usually are not electrically conductive. A separate conversion apparatus and process is required.
PRIOR ART
U.S. Pat. No. 5,406.582 issued Apr. 11, 1995 to Cornelius du Plessis, discloses an apparatus and process for activating carbon and reactivating spent carbon by electrical resistance heating in the presence of steam. In du Plessis, a gravity-feed apparatus includes a reactor that consists of two or more sequential tubular sections of refractory material. Each section of tubular refractory material contains a portion of a descending column of carbon feedstock, a steam jacket at the lower end of the refractory material that surrounds the column at its lower end and is provided with orifices that inject the steam at more than one distance from the central axis of the carbon feedstock column, and a graphite block at the upper end of the tubular refractory material serving as an electrode to introduce electric current into the descending column. The graphite block is positioned at the center of the top of the section by attachment to a steel plate that includes either a flat or V-shaped shelf and that is provided with openings to allow the escape of released gases and vapors.
Each steam jacket assembly, together with its adjacent portion of the tubular reactor, also serves as heat exchanger, whereby the hot carbon gives up some of its heat to the incoming steam and thereby superheats it.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the invention to provide an apparatus and process for making activated carbon from carbonaceous raw materials.
Another object of the invention is to provide an efficient apparatus and process for making activated carbon from carbonaceous raw materials.
Still another object of the invention is to provide an efficient apparatus and process for making carbon from carbonaceous raw materials.
Yet another object of the invention is to provide apparatuses and processes which are reliable in operation and easy of control.
A further object of the invention is to provide apparatus which is inexpensive of construction and easy of installation and use.
A still further object of the invention is to provide a new and efficient apparatus and process for converting a carbonaceous raw material into a carbonized material.
An additional object of the invention is to provide an inexpensive process for converting a carbonaceous raw material into a carbonized material.
A yet further object of the invention is to provide an apparatus and process for converting a carbonaceous raw material into a carbonized material that is advantageously combined with a reactor for activating or reactivating carbon.
A still further object of the invention is to provide an apparatus which can be used for creating activated carbon from both carbonaceous raw materials as well as spent carbon.
The objects of the invention are achieved by inserting before the carbon activator or reactivator section of existing apparatus, a carbonizing section achieving pyrolysis in a vertical tube by burning in a combustion box at the bottom of the carbonizing section gases released in the carbonizing section and in the lower reactor sections of the apparatus. Gasses generated from the heated feed stock of carbanaceous raw materials in the carbonizing section, flow down the tube with the feed stock through a product and gas separator where they are dissevered into a combustion box and ignited together with the gases flowing upwards from an adjacent lower reactor section. The ignited gas flows outward into a shell about the tube, rises therein to heat through the tube the feed stock, and then passes out via a chimney. The now carbonized feed stock continues its downward movement through the combustion box and enters the upper end of the adjacent reactor section through openings which also accommodate the upward movement of gasses from the reactor section into the combustion box.
REFERENCES:
patent: 3977947 (1976-08-01), Pyle
patent: 4273619 (1981-06-01), Angelo, II
patent: 5089457 (1992-02-01), Gaylard et al.
patent: 5190901 (1993-03-01), Hirai
patent: 5406582 (1995-04-01), Du Plessis
Taphorn Joseph B.
Tran Hien
LandOfFree
Apparatus and process for carbonization and activation of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and process for carbonization and activation of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and process for carbonization and activation of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2550530