Particulate solids injector
AssigneeUnivation Technologies, LLC
InventorsDavid B. Dentler, Charles J. Whatley
Life of this patent
Estimating the term…
Abstract
An apparatus for feeding a dry particulate solid into a pressurized vessel including: a solids reservoir; a rotating metering disc below the solids reservoir; a non-rotating component adjacent to the metering disc; a surface of contact between the metering disc and the non-rotating component, wherein the surface of contact comprises a low friction material; a drive shaft, a drive motor; a pickup section; and an injection tube is provided.
Claims27
An apparatus, the apparatus comprising:
- (a) a solids reservoir for holding a dry particulate solid;
- (b) a metering disc below the solids reservoir, wherein the metering disc rotates;
- (c) a non-rotating component adjacent to the metering disc;
- (d) a surface of contact between the metering disc and the non-rotating component, wherein the surface of contact comprises a low friction material;
- (e) a drive shaft, wherein the drive shaft rotates the metering disc;
- (f) a drive motor for rotating the drive shaft;
- (g) a pickup section;
- and
- (h) an injection tube.
The apparatus of any one of the preceding claims, wherein the surface of contact is a surface of the non-rotating component, the metering disc, or a combination thereof.
The apparatus of any one of the preceding claims, wherein the non-rotating component is a floating cover plate, wear plate, or combination thereof.
The apparatus of any one of the preceding claims, wherein the non-rotating component is a wear plate or a floating cover plate, and the wear plate or floating cover plate is a solid piece of polytetrafluoroethylene.
The apparatus of any one of the preceding claims, wherein a torque required to rotate the drive shaft is less than about 74.6 N-m.
The apparatus of any one of the preceding claims, wherein the torque required is less than about 27.1 N-m.
The apparatus of any one of the preceding claims, wherein the drive shaft rotates at a speed of less than 0.13 rpm without stalling the drive motor.
The apparatus of any one of the preceding claims, wherein a static coefficient of friction against polished steel of the low friction material is less than about 0.05.
An apparatus comprising:
- a reservoir, the reservoir having an interior volume;
- a barrier located below the reservoir, the barrier being mated to the reservoir and having at least one passageway therethrough;
- a drive shaft extending through an opening in the barrier;
- a lower sealing surface mated to the top of the barrier such that the lower sealing surface does not rotate, the lower sealing surface having at least one passageway therethrough aligned with the at least one barrier passageway;
- an upper sealing surface support anchored to the barrier such that the upper sealing surface support is fixed;
- an upper sealing surface engaged with the upper sealing surface support such that the upper sealing surface does not rotate;
- a metering device attached directly or indirectly to the drive shaft, the bottom of the metering device being in contact with the lower sealing surface and the top of the metering device being in contact with the upper sealing surface such that the at least one barrier passageway is substantially isolated from the reservoir interior, and the metering device containing at least one passageway therethrough, wherein when the metering device is rotated by the drive shaft at least one of the metering device passageways is open to the reservoir interior volume at a first time, and the at least one metering device passageway is aligned with the at least one barrier passageway at a second time;
- a receiving chamber attached to each of the barrier passageways;
- and
- an injection tube in fluid communication with the receiving chamber;
- wherein the surface of contact between the metering device and the lower sealing surface, the upper sealing surface, or both, comprises a low friction material.
Dependencies are inferred from the claim text.