The present description relates generally to processing systems and, more particularly, but not exclusively, to continuous mixers.
A continuous acoustic mixer (CAM) is a device that can impart acoustic energy onto one or more materials passing through it. The acoustic energy can mix, react, coat, or combine the materials. The CAM can often process materials more quickly and uniformly than batch mixers. The materials can then be conveyed to one or more downstream processing devices or collection devices.
According to some aspects of the present disclosure, a system for continuously processing a combination of materials is provided. The system includes a continuous process vessel having an outlet and one or more inlets, and the continuous process vessel is configured to oscillate along an oscillation axis. An acoustic agitator is coupled to the continuous process vessel, and the acoustic agitator is configured to oscillate the continuous process vessel along the oscillation axis, and an outlet passage is in fluid communication with the outlet. At least a portion of the outlet passage or at least a portion of the continuous process vessel is disposed within a portion of the acoustic agitator.
According to some aspects of the present disclosure, a method for continuously processing a combination of ingredients is provided. The method includes providing a continuous process vessel and an acoustic agitator, and the continuous process vessel includes an outlet. The method also includes introducing a first ingredient and a second ingredient to the continuous process vessel, oscillating the continuous process vessel along an oscillation axis using a motive force of the acoustic agitator to produce a mixed material, conveying the mixed material through the outlet and through an outlet passage in fluid communication with the outlet, and disposing at least a portion of the outlet passage or at least a portion of the continuous process vessel within a portion of the acoustic agitator.
Some aspects of the present disclosure provide a system for continuously processing a combination of materials. The system includes a continuous process vessel having an outlet and one or more inlets, and the continuous process vessel is configured to oscillate along an oscillation axis. An acoustic agitator is coupled to the continuous process vessel and configured to oscillate the continuous process vessel along the oscillation axis, and a power supply is configured to provide electrical or mechanical energy to the acoustic agitator. A conveyance means for conveying a mixed material, mixed in the continuous process vessel, through at least a portion of the acoustic agitator.
The accompanying drawings, which are included to provide further understanding and are incorporated in and constitute a part of this specification, illustrate disclosed aspects and together with the description serve to explain the principles of the disclosed aspects.
The following figures are included to illustrate certain aspects of the present disclosure, and should not be viewed as exclusive implementations. The subject matter disclosed is capable of considerable modifications, alterations, combinations and equivalents in form and function, without departing from the scope of this disclosure.
While this disclosure is susceptible of implementations in many different forms, there is shown in the drawings and will herein be described in detail implementations of the disclosure with the understanding that the present disclosure is to be considered as an exemplification of the principles of the disclosure and is not intended to limit the broad aspects of the disclosure to the implementations illustrated.
This disclosure generally relates to a continuous acoustic mixer (CAM). A CAM operates using an acoustic agitator to oscillate a continuous process vessel. The continuous process vessel can include internal structural features configured to transfer the oscillations into process ingredients passing therethrough. The structural features can include plates, wedges, or baffles having angled surfaces that act to impart acceleration forces on the process ingredients. These forces cause mixing and reacting of the process ingredients. In some implementations, the frequency of the oscillations can be relatively low while the acceleration forces can be relatively high. For example, in some implementations, the frequency of the oscillations can be greater than 1 Hz and less than 1 KHz. The acceleration forces can be greater than 1G and up to hundreds of Gs. The relatively low-frequency, high-intensity acoustic energy is used to create a near uniform shear field throughout substantially the entire continuous process vessel, which results in thorough mixing, rapid fluidization, reaction, and/or dispersion of the process ingredients. This process can be referred to as low-frequency acoustic agitation or “LFAA.” Operation at such high accelerations can subject the components of the CAM to large mechanical stresses. In some implementations, however, the CAM can operate at or near resonance, which promotes efficient operation.
Turning to the figures,
Some implementations of a CAM, such as the CAMs 100a-100c shown in
The acoustic agitator 110a can be a modified Resonant Acoustic Mixer (RAM), which is available from Resodyn Corporation of Butte, Mont. In some implementations, the acoustic agitator 110a agitates the continuous process vessel 120a with a peak-to-peak displacement between 0.125 inches 1.5 inches, inclusive. In some implementations, the acoustic agitator 110a agitates the continuous process vessel 120a with an acceleration between 1G and 200 Gs, inclusive. In some implementations, the acoustic agitator 110a agitates the continuous process vessel 120a at a frequency between 1 Hz and 1 KHz, inclusive. In some implementations, the acoustic agitator 110a agitates the continuous process vessel 120a at a frequency between 10 Hz and 100 Hz, inclusive. In some implementations, the acoustic agitator 110a agitates the continuous process vessel 120a at a frequency of approximately 60 Hz. The acoustic agitator 110a can cause the oscillation of the continuous process vessel 120a along an oscillation axis 152. The oscillation axis 152, in some implementations, is oriented substantially in parallel with a direction of a gravitational force. In some implementations, the oscillation axis 152 is oriented substantially perpendicular to the direction of the gravitational force. In some implementations, the oscillation axis 152 is oriented neither substantially perpendicular to, nor substantially in parallel with, the direction of the gravitational force.
The continuous process vessel 120a is disposed substantially, or entirely, adjacent the acoustic agitator 110a. The continuous process vessel 120a is attached, or releasably attached, to the acoustic agitator 110a by the fastener 130. Product passes through the outlet 154a disposed on a lower and/or outer portion of the continuous process vessel 120a following processing in the continuous process vessel 120a. An outlet passage 158a, in fluid communication with the outlet 154a, is visible in
A cavity 170 is formed in the acoustic agitator 110a. The cavity 170 may be of any size, shape or form. As shown in
Turning to
As indicated above,
Turning to
As shown in
As described above, the continuous process vessel 120c can be disposed substantially, or entirely, within the cavity 170 of the acoustic agitator 110c. The continuous process vessel 120c can also be disposed partially within the cavity 170, as shown in
In some implementations, as shown in
Turning to
In particular, the control system 220 senses a fill level of the collection device 210 using the level sensor 212. Based on the sensed fill level, the control system 220 commands an increase, decrease or no change in a rate of one or more ingredients being supplied from one or more of the feeders 230a and 230b into the continuous process vessel 120c. In some implementations, the feeders 230a and 230b are controlled by the control system 220 to increase, decrease or maintain a rate of one or more ingredients being supplied into the continuous process vessel 120c to keep the fill level within a particular range. In some implementations, the control system 220 commands the diverter valve 200 to redirect the mixed ingredients, or product, down the diverter outlet 204 when the fill level is above, below or at a given threshold value or range. In some implementations, the control system 220 commands the feeders 230a and 230b to increase, decrease or maintain a rate of one or more ingredients being supplied into the continuous process vessel 120c and/or commands the diverter valve 200 to redirect the mixed ingredients, or product, down the diverter outlet 204 depending on characteristics of the collection device 210, which will be discussed below in further detail.
The collection device 210 collects mixed ingredients, or product, exiting the outlet passage 158. The collection device 210 may be a drum, storage container or any other type of device for collecting and/or storing the product. The collection device 210 can also be a processing device 250 designed to further process the product. Examples of such a processing device 250 include a pill press, a tablet press, a capsule maker, a granulator, a mill, a hot-melt extrusion device and/or a drying device. Further, the product can directed, from the outlet passage 158 directly into an end-use device 260, which is a device in which the product will be used without further storing, processing or transporting. Examples of such an end-use device 260 include a rocket motor, flare, grenade, ammunition, bomb and/or a degassing chamber.
In general, the electric motors 310 produce linear motions that generate the oscillation force, and/or a linear force, that is then transmitted to the continuous process vessels 120a-120c disclosed herein. Turning to
Turning to
In order to stabilize and balance the drive system 300b during operations and oscillations of the drive system 300b, spring constants of springs 304b are altered and balancing masses 308 can be added to the upper plate 309b such that a center of mass Cb of the drive system 300b and a center of spring forces Sb of the drive system 300b are vertically-aligned or are located at the same point in space. In particular, the drive system 300b can include a plurality of spring 304b types having different spring constants, or spring forces. As will be understood by one skilled in the art, these springs having different spring constants or spring forces can be arranged to cause the center of mass Cb of the drive system 300b and the center of spring forces Sb of the drive system 300b to be vertically-aligned or be located at the same point in space. Further, a number or position of springs of the springs 304b may be altered to achieve the same effect. For example, springs 304b proximate the open end of the “U” shape of the drive system 300b may have decreased spring constants to move the center of mass Cb of the drive system 300b and the center of spring forces Sb of the drive system 300b into vertical alignment or to be located in the same point in space. It is to be understood that “vertically-aligned” as used with respect to Cb and Sb refers to alignment along the oscillation axis 152.
In some implementations, one or more balancing masses 308 are arranged on various components of the drive system 300b, for example on an upper plate 309b, to cause the center of mass Cb of the drive system 300b and the center of spring force Sb of the drive system 300b to be vertically-aligned or to be located at the same point in space. For example, the balancing masses 308 may be disposed proximate the open end of the “U” shape of the drive system 300b, for example on the upper plate 309b.
In some implementations, the drive system 300b uses a combination of balancing masses 308 and a plurality of spring 304b types having different spring numbers, constants, locations, or spring forces, to cause the center of mass Cb of the drive system 300b and the center of spring forces Sb of the drive system 300b to be vertically-aligned or to be located at the same point in space.
Turning to
In some implementations, the reinforcing structure 360 includes a bridge 362, one or more bridge supports 364 and one or more mechanical fasteners 367. The mechanical fasteners 367 releasably secure the bridge 362 to the bridge supports 364. The bridge supports 364 are, in some implementations, fixedly attached to ends of the upper plate 309b. The mechanical fasteners 367 can be any conventional fastening technology known to those skilled in the art, such as nuts and bolts, pins, clamps, etc. In this manner, the bridge 362, mechanical fasteners 367 and bridge supports 364 form the reinforcing structure 360, thereby adding structural strength to the drive system 300b. Further, as the bridge 362 is releasably attached to the bridge supports 364 and thus to the upper plate 309b, the bridge 362 can be removed from the upper plate 309b and/or from the drive system 300b to facilitate the insertion and removal of the continuous process vessel 120c from the acoustic agitator 110c through the opening formed by the “U” shape.
In operation, electrical power is provided to the motors 310 of the drive systems 300a and 300b. In some implementations, as best illustrated in
The disclosed systems and methods are well adapted to attain the ends and advantages mentioned as well as those that are inherent therein. The particular implementations disclosed above are illustrative only, as the teachings of the present disclosure may be modified and practiced in different but equivalent manners apparent to those skilled in the art having the benefit of the teachings herein. Furthermore, no limitations are intended to the details of construction or design herein shown, other than as described in the claims below. It is therefore evident that the particular illustrative implementations disclosed above may be altered, combined, or modified and all such variations are considered within the scope of the present disclosure. The systems and methods illustratively disclosed herein may suitably be practiced in the absence of any element that is not specifically disclosed herein and/or any optional element disclosed herein. While compositions and methods are described in terms of “comprising,” “containing,” or “including” various components or steps, the compositions and methods can also “consist essentially of” or “consist of” the various components and steps. All numbers and ranges disclosed above may vary by some amount. Whenever a numerical range with a lower limit and an upper limit is disclosed, any number and any included range falling within the range is specifically disclosed. In particular, every range of values (of the form, “from about a to about b,” or, equivalently, “from approximately a to b,” or, equivalently, “from approximately a-b”) disclosed herein is to be understood to set forth every number and range encompassed within the broader range of values. Also, the terms in the claims have their plain, ordinary meaning unless otherwise explicitly and clearly defined by the patentee. Moreover, the indefinite articles “a” or “an,” as used in the claims, are defined herein to mean one or more than one of the element that it introduces. If there is any conflict in the usages of a word or term in this specification and one or more patent or other documents that may be incorporated herein by reference, the definitions that are consistent with this specification should be adopted.
As used herein, the phrase “at least one of” preceding a series of items, with the terms “and” or “or” to separate any of the items, modifies the list as a whole, rather than each member of the list (i.e., each item). The phrase “at least one of” allows a meaning that includes at least one of any one of the items, and/or at least one of any combination of the items, and/or at least one of each of the items. By way of example, the phrases “at least one of A, B, and C” or “at least one of A, B, or C” each refer to only A, only B, or only C; any combination of A, B, and C; and/or at least one of each of A, B, and C.
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