Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Pigment or carbon black producer
Reexamination Certificate
1997-03-24
2002-06-04
Johnson, Jerry D. (Department: 1764)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Pigment or carbon black producer
C422S108000, C422S165000, C422S119000, C425S130000, C073S863510, C073S863520, C073S863540, C423S449600
Reexamination Certificate
active
06399029
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to components of a chemical processing system. More particularly, the present invention relates to means for improving the chemical feed, means for improving sample removal from a chemical process in operation, and means for maintaining an acceptable fluid flow or vacuum through a chemical processing operation.
BACKGROUND OF THE INVENTION
In many types of chemical processing, there is a need for the physical process parameters to be substantially maintained. Any significant interruption of these parameters can degrade product quality, decrease efficiency, and have other undesirable effects. For example, in many types of chemical processing, there is a need for a substantially uniform and uninterrupted fluid flow through a mixing or reacting zone, such as a pelletizer. While a uniform and uninterrupted fluid flow needs to be maintained, this presents a problem when it comes to trying to obtain a sample of the product in order to check the quality of the product. Many times, if one attempts to sample the product, this creates an interruption in the fluid flow which can affect the product quality.
In addition, in certain types of chemical processing, there is a need to maintain a continuous metering of chemicals into a mixing or reacting zone. The metering of chemicals, many times, not only has to be continuous, but must also maintain a consistent feed rate. Again, if there is an interruption in the continuous metering of chemical or an interruption in the feed rate, this can lead to poor product quality. Accordingly, there is a need to develop a system which permits the continuous metering of chemicals and which can maintain a substantially consistent feed rate as well.
SUMMARY OF THE INVENTION
It is an objective of the present invention to provide an overall chemical processing system which achieves a substantially uniform and uninterrupted fluid flow through a mixing or reacting zone.
Another feature of the present invention is to provide a means for sampling products from a reacting or mixing zone without the interruption of the fluid flow through the mixing or reacting zone.
A further feature of the present invention is to provide a means for the continuous metering of chemicals while maintaining substantially the same feed rate without interruption.
Additional features and advantages of the present invention will be set forth in part in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention will be realized and attained by means of the elements and combinations particularly pointed out in the written description and appended claims.
To achieve these and other advantages and in accordance with the purposes of the present invention, as embodied and broadly described herein, the present invention relates to a chemical processing system which includes a chemical mixing or reacting zone; an inlet to the zone; and an outlet from the zone. The chemical processing system also includes a vacuum or fluid flow source located downstream of the outlet and a means to control the amount of vacuum or fluid flow through the chemical mixing or reacting zone.
The present invention further relates to a sample port assembly for obtaining a sample of material flowing through a processing system. The sample port assembly includes a port in the assembly and a sample cup holder adapted to be moved in the port to obtain a sample of the material without substantially affecting the fluid pressure or flow within the system.
The present invention further relates to a continuous feeder having first and second loss-in-weight feeders and means for measuring a lower limit of feed in each feeder. The continuous feeder system further includes means to activate the second feeder when the lower limit is obtained in the first feeder and means to deactivate the first feeder when the lower limit is detected in the first feeder.
Each of these features can be used together in a chemical processing system or can be used individually in the chemical processing industry.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are intended to provide further explanation of the present invention, as claimed.
The accompanying figures, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the present invention and together with the description, serve to explain the principles of the present invention.
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Mathew John
Porteous William M.
Cabot Corporation
Johnson Jerry D.
Varcoe Frederick
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