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The present application provides a solids feeder in communication with a flow of solids and a flow of a conveying fluid. The solids feeder may include an outlet channel with the flow of the solids therein and a discharge port in communication with the outlet channel. The discharge port further may i

The present application provides a solids feeder in communication with a flow of solids and a flow of a conveying fluid. The solids feeder may include an outlet channel with the flow of the solids therein and a discharge port in communication with the outlet channel. The discharge port further may include an inlet in communication with the flow of the conveying fluid and a flow channel. The flow channel may include a reduced cross-sectional area about the outlet channel as compared to the inlet.

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1. A solids feeder in communication with a flow of solids from a solids source and a flow of conveying fluid from a fluid source, the solids feeder comprising: a feeder body;a disc disposed within the feeder body, wherein the disc at least partially imparts flow to the flow of solids;an outlet chann

1. A solids feeder in communication with a flow of solids from a solids source and a flow of conveying fluid from a fluid source, the solids feeder comprising: a feeder body;a disc disposed within the feeder body, wherein the disc at least partially imparts flow to the flow of solids;an outlet channel of feeder body with the flow of the solids therein; anda discharge port in fluid communication with the outlet channel, wherein the outlet channel supplies the flow of solids to the discharge port, wherein the discharge port comprises: an inlet in fluid communication with the flow of conveying fluid, wherein the inlet supplies the flow of conveying fluid from the fluid source to the discharge port; anda flow channel in fluid communication with the inlet and the outlet channel, wherein the flow of conveying fluid passes through the flow channel, wherein the flow channel comprises a reduced cross-sectional area at the outlet channel as compared to the inlet, wherein the flow of solids entering the flow channel at the reduced cross-sectional area is transverse to the flow of conveying fluid flowing through the flow channel at the reduced cross-sectional area, wherein the flow channel comprises a variably reduced cross-sectional area, and wherein the flow channel comprises a moveable plate therein. 2. The solids feeder of claim 1, wherein the inlet comprises a circular inlet cross-sectional area and wherein the circular inlet cross-sectional area is larger than the reduced cross-sectional area. 3. The solids feeder of claim 1, wherein the discharge port comprises an outlet in communication with a conveying line. 4. The solids feeder of claim 3, wherein the outlet comprises a circular outlet cross-sectional area and wherein the circular outlet cross-sectional area is larger than the reduced cross-sectional area. 5. The solids feeder of claim 1, wherein the reduced cross-sectional area of the flow channel comprises a rectangular cross-sectional area. 6. The solids feeder of claim 1, wherein the flow channel comprises a transitional inlet cross-sectional area and a transitional outlet cross-sectional area. 7. The solids feeder of claim 1, wherein the flow channel comprises one or more agitators therein. 8. The solids feeder of claim 7, wherein the one or more agitators comprise a plurality of blades. 9. The solids feeder of claim 1, further comprising a downstream check valve positioned downstream of the flow channel and an upstream check valve positioned upstream of the flow channel. 10. The solids feeder of claim 9, wherein the downstream check valve comprises a flapper check valve. 11. The solids feeder of claim 9, wherein the upstream check valve comprises a butterfly check valve. 12. The solids feeder of claim 1, further comprising one or more shutoff valves positioned about the discharge port. 13. The solids feeder of claim 1, wherein the outlet channel comprises a distribution ring. 14. The solids feeder of claim 13, wherein the distribution ring comprises an injection layer, a porous layer, and an open distribution channel layer. 15. The solids feeder of claim 1, wherein the discharge port comprises a distribution ring. 16. The solids feeder of claim 15, wherein the distribution ring comprises an injection layer and a distribution channel.