A docking seal for the contamination-free connection of a first flexible casing or enveloping enclosure with a second flexible casing, comprising a first seal device which is connectable or is connected with the first casing, and a second seal device which is connectable or is connected with the second casing, wherein the first seal device comprises a first docking port, a first end port and a first slider, and the second seal device comprises a second docking port, a second end port and a second slider. The invention, furthermore, relates to a docking method for the contamination-free connection of a first flexible casing with a second flexible casing with such a docking seal.

A system is disclosed for conveying proppant from a container to fracking operation equipment. The system includes a proppant delivery assembly having a frame supporting the container adjacent a proppant mover having a conveyor, a shroud enclosing a portion of the conveyor, a proppant chamber coupled to the shroud and a chute coupled to the proppant chamber. The system also includes a dust collection assembly fluidly coupled to the proppant mover to collect the dust particles contained therein. The dust collection assembly includes an air mover, a hood with a dust receptacle, and ductwork coupling the air mover to the dust receptacle. An air flow is generated along a flow path through the dust receptacle and the ductwork to the air mover such that a suction pressure generated by the air mover is sufficient to only capture and remove the dust particles, thus reducing a risk of capturing the proppant.

Embodiments of the present disclosure describe a system for capturing dust and dust-laden air caused by the agitation, movement or transfer of particulate material. The system includes a dust collection assembly positioned proximate and associated with the delivery of particulate material to capture dust particles released by movement and settling of the particulate material when being dispensed and delivered. The dust collection assembly is positioned to direct an air flow in a flow path overlying the dust particles to capture the dust particles and move the dust particles away from the proppant thereby reducing risk of dust exposure.

A dust capture and reclamation system for a rubber conveyor belt having a housing for mounting over a portion of the rubber conveyor belt, a plurality of idler roller assemblies, a plurality of return roller assemblies, a trough for mounting under the rubber conveyor belt to catch granular material falling from the rubber conveyor belt, the trough having an inside surface, a mechanism for moving granular material along the inside surface to a collection point, a first access panel through one side for accessing an idler roller, and a second access panel through one of the pair of opposed side walls for accessing a return roller assembly.

An apparatus for rotary dumping of rail cars, including a material receiving pit. A rotary rail car dumper includes a rotational frame supporting at least one baffle. The rotational frame is configured to dump a load from a rail car during rotational motion of the rotational frame between an upright position wherein the entire load is in the rail car and a dumping position wherein the load can exit the rail car. A backside airflow diverter is located beneath the rotational frame and includes a curved upper surface. A lower margin of the at least one baffle contacts the curved upper surface during at least part of the rotational motion of the rotational frame.

A method and apparatus that reduce release of dust generated during rotary dumping of rail cars in a dumping facility. The method includes removing dust laden air from a space bounded by a backside airflow diverter, a rotational frame, a first baffle and a second baffle while the rotational frame is rotating with a rail car by drawing the dust laden air through a secondary air intake that passes through the backside airflow diverter into a backside hood. A dust control apparatus includes a diverter, overlying a backside hood having a concave curved upper surface; and at least one secondary air intake positioned to pass through the diverter being located approximately where pressure in the backside hood remains neutral or negative relative to a pressure even there is a transient increase in air pressure in a lower portion of the backside hood.

A device is provided for transferring bulk materials from a vehicle through a grate to a structure disposed below the grate. The device includes a plate disposed over the grate and defining an opening smaller than the grate. The device further includes a hopper configured to rest on the plate between the plate and the underside of the vehicle. The hopper defines a bottom opening configured for alignment with the opening in the plate and a top opening configured for alignment with a discharge spout on the vehicle and the top opening is larger than the bottom opening. The device further includes means for moving the hopper to an operating position in which the bottom and top openings are aligned with the opening in the plate and the discharge spout on the vehicle.

A device is provided for transferring bulk materials from a vehicle through a grate to a structure disposed below the grate. The device includes a plate disposed over the grate and defining an opening smaller than the grate. The device further includes a hopper configured to rest on the plate between the plate and the underside of the vehicle. The hopper defines a bottom opening configured for alignment with the opening in the plate and a top opening configured for alignment with a discharge spout on the vehicle and the top opening is larger than the bottom opening. The device further includes means for moving the hopper to an operating position in which the bottom and top openings are aligned with the opening in the plate and the discharge spout on the vehicle.

A method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. 1.72(b). As stated in 37 C.F.R. 1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading Abstract of the Disclosure. The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

A method of reducing silicosis caused by inhalation of silica-containing proppant, such as silica sand and resin-coated silica sand, and apparatus therefor. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. 1.72(b). As stated in 37 C.F.R. 1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading Abstract of the Disclosure. The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.