An object of the invention is to provide a space-saving powder supply device capable of supplying a plurality of kinds of powder at one place. A powder supply device according to the present invention is provided with: a main body; a container for storing powder therein; a conveyance unit; and a plurality of stockers. The conveyance unit has a supply region which is a region for supplying the powder from the stocker to the container mounted on the upper side of the conveyance unit. The stocker has: a charge port through which the powder can be charged into the stocker; a supplier for supplying the powder stored in the stocker from the supply port. The stocker is connected to the main body, with the plurality of stockers being arranged radially around the supply region, and a center axis of the supplier being directed to a center of the supply region.

A secondary silo on a second portable frame is independently portable relative to a primary silo and a vertical conveyor on a first portable frame. The vertical conveyor conveys flowable proppant material from an intake hopper below the primary silo into either one of the silos. The silos have gravity discharge chutes that are gravity fed directly into a proppant blender unit. An unloader on wheels is self-propelled and steerable relative to the silos. The unloader can be lowered relative to the wheels to sit on the ground to allow vehicles to drive over the unloader for discharge. Intake hoppers of the unloader can be raised up against the vehicle to form a closed duct discharging from the vehicles into the unloader. A discharge of the unloader forms a closed passage with the intake hopper of the vertical conveyor.

A secondary silo on a second portable frame is independently portable relative to a primary silo and a vertical conveyor on a first portable frame. The vertical conveyor conveys flowable proppant material from an intake hopper below the primary silo into either one of the silos. The silos have gravity discharge chutes that are gravity fed directly into a proppant blender unit. An unloader on wheels is self-propelled and steerable relative to the silos. The unloader can be lowered relative to the wheels to sit on the ground to allow vehicles to drive over the unloader for discharge. Intake hoppers of the unloader can be raised up against the vehicle to form a closed duct discharging from the vehicles into the unloader. A discharge of the unloader forms a closed passage with the intake hopper of the vertical conveyor.

A system for handling particulate material includes a vessel and an outflow conveyor. The vessel includes an inlet configured for receipt of particulate material into the vessel, and a plurality of discharge conveyors. Each discharge conveyor is configured to move particulate material in the vessel towards a corresponding discharge valve. The outflow conveyor is configured to receive particulate material from each discharge valve.

A system for handling particulate material includes a vessel and an outflow conveyor. The vessel includes an inlet configured for receipt of particulate material into the vessel, and a plurality of discharge conveyors. Each discharge conveyor is configured to move particulate material in the vessel towards a corresponding discharge valve. The outflow conveyor is configured to receive particulate material from each discharge valve.

A proppant delivery assembly receives and supports a plurality of containers having proppant stored therein. A cradle has a top surface which receives and supports the plurality of containers when positioned thereon. The cradle enables the plurality of containers to dispense the proppant stored therein. A proppant mover is positioned to underlie and extend along the top surface of the cradle aligned with the plurality of containers to receive proppant from the plurality of containers. The proppant mover carries proppant away from the plurality of containers. A chute is coupled to the cradle for receiving proppant from the proppant mover and directing the proppant to a blender hopper. A hood assembly is disposed at an end of the chute opposite the proppant mover for directing a vacuum air flow that removes a volume of air containing proppant dust particles directed from the chute. The hood assembly includes a curtain extending about a perimeter of the hood assembly and downward therefrom to at least partially define the volume of air being removed by the hood assembly.

A proppant delivery assembly receives and supports a plurality of containers having proppant stored therein. A cradle has a top surface which receives and supports the plurality of containers when positioned thereon. The cradle enables the plurality of containers to dispense the proppant stored therein. A proppant mover is positioned to underlie and extend along the top surface of the cradle aligned with the plurality of containers to receive proppant from the plurality of containers. The proppant mover carries proppant away from the plurality of containers. A chute is coupled to the cradle for receiving proppant from the proppant mover and directing the proppant to a blender hopper. A hood assembly is disposed at an end of the chute opposite the proppant mover for directing a vacuum air flow that removes a volume of air containing proppant dust particles directed from the chute. The hood assembly includes a curtain extending about a perimeter of the hood assembly and downward therefrom to at least partially define the volume of air being removed by the hood assembly.

A proppant container facilitates the transportation of wet sand for use in a hydraulic fracturing operation. The container is mounted in a cradle that tips downward in arcuate motion for discharge or proppant through a top opening The tipping mechanism may be driven by a system of gears or a hydraulic ram.

A storage bin sweep system including a sweep assembly having an inboard end, an outboard end, a forward side and a rearward side and including a sweep housing extending between the inboard and outboard ends, a plurality of paddles movable on a path extending along at least a portion of the sweep assembly between the inboard and outboard ends, and an endless loop member mounted on the sweep housing and on which the plurality of paddles are mounted at spaced locations along the endless loop member. At least one of the paddles may have a front surface contoured in a manner to urge particles located forward of the paddle toward the rearward side of the sweep assembly as the paddle moves toward the inboard end of the sweep assembly.

Systems and methods for conveying non-dry frac proppant are described herein. The system generally includes at least one hopper having at least one moisture sensor, a slide gate that is fluidly connected to the at least one hopper, a conveyor assembly having at least one conveyor belt configured to convey the non-dry frac proppant from the at least one hopper to a blender, and at least one load sensor, and a control device configured to regulate a discharge rate of the non-dry frac proppant and a load rate of the non-dry frac proppant. The method generally includes providing the system at a well site to convey a non-dry frac proppant from a source point the at least one hopper, the conveyor assembly at a discharge rate determined by the control device, and the blender at a load rate determined by the control device.