System For Pneumatically Conveying Particulate Material
First Claim
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1. An apparatus for pneumatically conveying particulate material from a container to an application site, comprising:
- a mill that is operative to reduce the particle size of the material, the mill having a specified air flow capacity;
a blower having a maximum air flow output greater than the specified air flow capacity of the mill;
means for pneumatically interconnecting the blower with the container, the mill, and the application site for the air flow output of the blower to drive a first stream of material-free air from the blower to the container, a second stream of material-laden air from the container to the mill, and a third stream of material-laden air from the mill to the application site; and
means for maintaining the air flow in the second flow path equal to or substantially equal to the specified air flow capacity of the mill.
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Abstract
An apparatus for pneumatically conveying particulate material to an application site includes a mill that is operative to reduce the particle size of the material. The mill has a specified air flow capacity. The apparatus further includes a container for the particulate material, an air lock that discharges the particulate material from the containers and a blower. The blower has a specified air flow output greater than the air flow capacity of the mill.
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Citations
7 Claims
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1. An apparatus for pneumatically conveying particulate material from a container to an application site, comprising:
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a mill that is operative to reduce the particle size of the material, the mill having a specified air flow capacity; a blower having a maximum air flow output greater than the specified air flow capacity of the mill; means for pneumatically interconnecting the blower with the container, the mill, and the application site for the air flow output of the blower to drive a first stream of material-free air from the blower to the container, a second stream of material-laden air from the container to the mill, and a third stream of material-laden air from the mill to the application site; and means for maintaining the air flow in the second flow path equal to or substantially equal to the specified air flow capacity of the mill. - View Dependent Claims (2)
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3. An apparatus for pneumatically conveying particulate material to an application site, comprising:
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a container for the particulate material; an air lock operatively associated with the container to discharge the particulate material from the container; a mill that is operative to reduce the particle size of the material, the mill having a specified air flow capacity; a blower having a maximum air flow output greater than the air flow capacity of the mill; and pneumatic lines configured to interconnect the blower, the air lock, and the mill along pneumatic flow paths including; a) a first flow path to convey material-free air from the blower to the air lock; b) a second flow path to convey material-laden air from the air lock to the mill; c) a third flow path to convey material-laden air from the mill toward the application site; and d) a fourth flow path to convey material-free air from the blower to the third flow path, whereby actual blower output in excess of the specified air flow capacity of the mill can be applied to convey milled material toward the application site. - View Dependent Claims (4, 5)
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6. An apparatus for pneumatically conveying particulate material to an application site, comprising:
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a first source of pressurized air; a pneumatic conveyance line configured to convey the material in a stream of air from the first source; a plurality of injection lances branching from the pneumatic line and terminating at the application site; a second source of pressurized air separate from the first source; and a plug clearance system including a subsystem at each injection lance, with each subsystem comprising a sensor that is operative to sense pneumatic pressure in the respective lance, a first valve that is operative to block the flow of material-laden air from the pneumatic conveyance line through the lance, and a second valve that is operative to direct material-free air from the second source into the lance, whereby the material-free air can clear a plug of material from the lance. - View Dependent Claims (7)
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Specification