This invention is about a coal feeding system (1) which feeds pulverized coal and oxygen separately and vertically through concentric pipes directly to the upper level of the reactor (R) at entrained flow gasification systems. The system (1) consists a top intake (2), a side intake (3), an air supply chamber (4), an oxygen port (5), an ultrasonic sensor port (6), an inner concentric pipe (7), and an outer concentric pipe (8). The system (1) also operates with a coal bunker (K), a screw feeder (B) for adjusting the coal mass flow rate from the coal bunker (K) through the coal feeding system (1) to the reactor (R), and a reactor (R) where the coal are sprayed from the coal feeding system (1) and gasified at high temperatures.

This invention is about a coal feeding system (1) which feeds pulverized coal and oxygen separately and vertically through concentric pipes directly to the upper level of the reactor (R) at entrained flow gasification systems. The system (1) consists a top intake (2), a side intake (3), an air supply chamber (4), an oxygen port (5), an ultrasonic sensor port (6), an inner concentric pipe (7), and an outer concentric pipe (8). The system (1) also operates with a coal bunker (K), a screw feeder (B) for adjusting the coal mass flow rate from the coal bunker (K) through the coal feeding system (1) to the reactor (R), and a reactor (R) where the coal are sprayed from the coal feeding system (1) and gasified at high temperatures.

A pneumatic distribution system for pneumatically distributing material in an agricultural vehicle is described. In one example, the pneumatic distribution system comprises an air source having an outlet with different air pressures defining a pressure gradient across the outlet, and a plurality of inlet ports configured to receive air from the outlet for a plurality of distribution streams, comprising at least a first distribution stream with a first pressure loss value and a second distribution stream with a second pressure loss value that is greater than the first pressure loss value. The inlet ports for the first and second distribution streams are located relative to the pressure gradient such that the second distribution stream receives a higher air pressure than the first distribution stream.

The present invention provides a protective wear cover which may be utilized in a metering device housing to protect the housing in an area which may be subjected to high impact by product flow. The protective wear cover may be installed inside the metering device housing at the venturi induction zone. The protective wear cover may be manufactured from a highly wear resistant material. The shape of the protective wear cover may be suited to conform to the metering device housing in the protected area to ensure a tight fit and negligible effect on air flow. This protective wear cover may therefore serve as a sacrificial barrier which prevents wear on the metering device housing and may be periodically replaced when worn. Replacing the protective wear cover negates the need to replace the whole metering device housing.

A meter apparatus for dispensing agricultural products into a product conduit carrying a product air stream at a product air pressure. A sealed tank is pressurized to a tank pressure that is substantially equal to the product air pressure, and a meter roller mounted on a shaft is mounted in a housing below the sealed tank. A drive is operative to rotate the shaft and the meter roller. Clearance spaces are provided each side of the meter roller. Bearings mount the shaft to the housing, and seals are mounted to the shaft and to the housing between the right and left bearings and the meter roller. The housing defines right and left chambers between the seals and the meter roller. The purging conduit carries a purging air stream at a purging air pressure that is greater than the product air pressure into the chambers, and through the clearance space.

A powder feeder includes a plurality of driving rollers with their axial centers horizontal, a cylindrical hopper placed on the driving rollers and rotationally driven, a connection opening formed in the rotating hopper for loading powder therein, a chuck inserted into the connection opening and supported by a support frame, a powder discharge passage interconnecting the inside and outside of the rotating hopper through the chuck, a scooping part continuously formed on an inner surface of the rotating hopper which faces an inner end of the powder discharge passage, and a pressurization passage open to the inside of the rotating hopper for pressurizing the inside of the rotating hopper, the inner end of the powder discharge passage interconnecting the inside and outside of the rotating hopper being open to a location where the powder that has been scooped up by the scooping part falls down.

An air cart has a drop chute for conveying an agricultural product such as seed, from a metering device to a venturi portion of a product conveyance tube. The drop chute has a contoured downstream sidewall resulting in changes in drop chute width which introduce vortices providing an enhanced product flow. The downstream sidewall has an inward sloping region reducing the drop chute width beginning closely adjacent the metering device and continuing down about one-third the way from the metering device to the conveyance tube, and an abrupt corner causing an increase in drop chute width near the product conveyance tube followed by a curved region creating a gradual further increase in width terminating adjacent to the product delivery tube. A large low speed vortex is created near the inward sloping region and a small strong vortex is created adjacent the curved region.

An air cart has a drop chute for conveying an agricultural product such as seed, from a metering device to a venturi portion of a product conveyance tube. The drop chute has a contoured downstream sidewall resulting in changes in drop chute width which introduce vortices providing an enhanced product flow. The downstream sidewall has an inward sloping region reducing the drop chute width beginning closely adjacent the metering device and continuing down about one-third the way from the metering device to the conveyance tube, and an abrupt corner causing an increase in drop chute width near the product conveyance tube followed by a curved region creating a gradual further increase in width terminating adjacent to the product delivery tube. A large low speed vortex is created near the inward sloping region and a small strong vortex is created adjacent the curved region.

A system includes a pump configured to transfer a granular material out of a hopper into a transfer pipe. The pump includes an upstream portion having an upstream helical flight and a downstream portion having a downstream helical flight. The downstream portion includes a tailpiece. An outer diameter of the downstream helical flight is less than an outer diameter of the upstream helical flight, a gap between the outer diameter of the downstream helical flight and an auger housing is greater than a gap between the outer diameter of the upstream helical flight and the auger housing, a thickness of the downstream helical flight is less than a thickness of the upstream helical flight, a surface of the downstream portion has a lesser coefficient of friction than a surface of the upstream portion, or a combination thereof.

A system includes a pump configured to transfer a granular material out of a hopper into a transfer pipe. The pump includes an upstream portion having an upstream helical flight and a downstream portion having a downstream helical flight. The downstream portion includes a tailpiece. An outer diameter of the downstream helical flight is less than an outer diameter of the upstream helical flight, a gap between the outer diameter of the downstream helical flight and an auger housing is greater than a gap between the outer diameter of the upstream helical flight and the auger housing, a thickness of the downstream helical flight is less than a thickness of the upstream helical flight, a surface of the downstream portion has a lesser coefficient of friction than a surface of the upstream portion, or a combination thereof.