Mixing device 1, dosing container and mixing hopper for mixing a synthetic starting material with an additive, in particular a granular additive or additive in powder form, comprising a mixing housing 10 with an inlet 14 for allowing the substances into a mixing chamber 12 bounded by the mixing housing and an outlet 16 for discharging the substances from the mixing chamber in mixed form, wherein a rotor body 11 is provided on a rotatable shaft 17 in the mixing chamber and comprises on a side a number of rotor arms 18 extending parallel to the shaft in the direction of an opposite wall of the mixing housing 10, and wherein the opposite wall of the mixing housing is provided with a number of stator arms 19 extending parallel to the shaft in the direction of the rotor body, and wherein a mixing hopper is provided having an infeed side for receiving a flow of the substances for mixing and an outfeed side which is in open communication with the inlet of the mixing housing 10, and wherein a dividing body is provided between the infeed side and outfeed side in order to divide the flow of the substances for mixing into a number of at least substantially equal part-flows.

A system for capturing airborne particles from a mixing apparatus for mixing mineral based building materials, particularly such materials containing a silica based material, wherein there is a hood assembly attachable to a mixing apparatus and positionable such that airborne particles generated in loading the mixing apparatus are drawn into the hood, the hood being operatively connectable to a vacuum/filtration apparatus.

The present invention is a dust abatement device that secures over a container. Powdery material, such as plaster, cement, grout or the like, is poured through the device, and mixed with water inside the container. The device has a mounting sleeve and radial manifold. The manifold forms a radial pneumatic channel with a circumferentially disbursed air intake that generates a radially uniform airflow to draw in airborne dust that would otherwise escape to the surrounding air. The manifold is connected to a vacuum with an air filter, and generates a dust shield zone above and around the device, which only extends down from the manifold a few inches. The manifold also funnels material and water into the container, and forms an inner eave that spaces material and water from the air intake, and forms a splash guard to retain upwardly projected splashes of material and water inside the container.

In order to efficiently produce a liquid containing ultrafine bubbles of a desired gas, an ultrafine bubble-containing liquid producing apparatus includes a gas dissolving unit that dissolves a predetermined gas into a liquid, and a UFB generating unit that generates ultrafine bubbles in the liquid in which the predetermined gas is dissolved. A CPU performs control under a first condition in a case of causing the gas dissolving unit to operate in a circulation route passing through the dissolving unit. The CPU performs control under a second condition different from the first condition in a case of causing the UFB generating unit to operate in a circulation route passing through the UFB generating unit.

A solenoid valve includes a main valve, a first auxiliary valve, a second auxiliary valve, a main valve body, and an auxiliary valve body. The main and auxiliary valve bodies are axially parallel and detachably connected. The main valve is mounted on the main valve body, the first and second auxiliary valves are mounted on the auxiliary valve body, which is provided with an air inlet, a cylinder port and an air discharging port. The air inlet communicates with the main valve through a first air passage. The cylinder port is sequentially in communication with the first and second auxiliary valves and the main valve through a second air passage. The air discharging port sequentially communicates with the first and second auxiliary valves and the main valve through a third air passage. The main and second auxiliary valves are solenoid valves. The first auxiliary valve is a hand-operated valve.

A coulter assembly for collecting soil samples from an agricultural field in one embodiment comprises an annular collection blade configured for penetrating soil to capture a sample, an annular cam ring configured for stationary mounting to a frame of an agricultural vehicle and comprising a cam track, a blade hub coupled to the blade for rotatably supporting the annular collection blade from the annular cam ring, and a movable sample collector mounted to the annular collection blade. The moveable sample collector is configured and operable for extracting a soil sample as the annular collection blade is rotated through the soil. The moveable sample collector in one embodiment comprises a piston mechanism including a cylinder and rod movably disposed therein which actuated by the annular cam ring to alternatingly open and close a collection end of the cylinder as the annular collection blade rotates through the soil.

A mobile chemical mixing plant includes an inlet for receiving fluid; a fluid conduit for conveying the fluid from the inlet; a container for containing a chemical therein; a chemical pump for withdrawing the chemical from the container and directing the chemical into the fluid conduit for mixing with the fluid in the fluid conduit to form a chemical mixture; and a homogenization pump for pumping the chemical mixture in the fluid conduit out of the mobile chemical mixing plant. The fluid conduit connects the chemical pump to the homogenization pump. The mobile chemical mixing plant is fixed to a trailer that is attachable to a vehicle. Because the fluid conduit directly connects the chemical pump to the homogenization pump, the mobile chemical mixing plant does not need an intervening mixing tank for mixing the fluid and the chemical.

Disclosed are a fully electric-drive sand-mixing apparatus and an automatic control system therefor. The fully electric-drive sand-mixing apparatus comprises a foundation (01); and a suction pump (02), a suction pump driving electric motor (03), a suction manifold (04), a mixing stirrer (05), a mixing stirrer driving electric motor (06), a dry-ingredient-adding device (07), a dry-ingredient-adding device driving electric motor (08), a liquid-adding device (09), a liquid-adding device driving electric motor (10), a sand-conveying device (11), a sand-conveying device driving electric motor (12), a discharge pump (13), a discharge pump driving electric motor (14), a discharge manifold (15), a frequency converter placement room (16) and an operation room (17), which are fixedly connected to the foundation (01). The suction pump driving electric motor (03), the mixing stirrer driving electric motor (06), the dry-ingredient-adding device driving electric motor (08), the liquid-adding device driving electric motor (10), the sand-conveying device driving electric motor (12) and the discharge pump driving electric motor (14) are fixedly and electrically connected to the suction pump (02), the mixing stirrer (05), the dry-ingredient-adding device (07), the liquid-adding device (09), the sand-conveying device (11) and the discharge pump (13), respectively.

The present disclosure includes embodiments of a recirculation system and methods for mitigating release of silica dust at a hydrocarbon well site. The embodiments of the recirculation system may include a blender hopper, one or more proppant silos, a footed hood, a conveyor, one or more amplifiers, one or more compressed air sources, one or more vacuum hoses, an augur, and a blender. In one or more embodiments, the methods of recirculating silica dust to mitigate the release of silica dust includes conveying sand proppant on a conveyor from the one or more proppant silos to a blender hopper, directing sand proppant from the conveyor into the blender hopper, supplying compressed air to one or more amplifiers, directing sand proppant from the blender hopper to a blender via an augur, and adjusting the extent of at least one of the two or more leg segments and the leg adjustment arrangement.

A low pressure fluctuation control apparatus comprises a liquid recirculation loop comprising a dip tube, a diaphragm or bellows type pump, a first regulator, a first flow meter, a junction, and a return tube. A back pressure controller is located in the return tube. In addition, the apparatus comprises a material supply line fluidly connected the liquid recirculation loop via the junction. A flow control system is located in the material supply line. The recirculation loop draws liquid from a supply container by the dip tube, and returns a portion of the liquid to the supply container by the return tube. The backpressure flow controller regulates the flow rate of the liquid, thereby steadying fluctuations in the liquid being supplied.