Some embodiments of the present disclosure provide a material intake device and a urea preparation machine. The material intake device includes a housing, an inlet port is provided at a first end of the housing, and an outlet port is provided at a second end of the housing, and the housing is further provided with an exhaust port used for exhausting an air in the housing; a separation plate is provided within the housing to isolate the inlet port from the exhaust port, an air inlet duct and an exhaust ductexhaust duct are formed respectively between the separation plate and sidewalls of the housing, the exhaust port is communicated with the exhaust ductexhaust duct, and an overflow port connecting the air inlet duct to the exhaust ductexhaust duct is provided between a bottom of the separation plate and the sidewalls of the housing.

An improved guard for a pump propeller is described herein. The guard includes a hub that in use surrounds a drive shaft of a drive motor unit that drives the propeller. The vanes define a propeller receiving area in which the propeller is received allowing the propeller to rotate relative to the vanes, while portions of the vanes radially surround the propeller. The guard is fixed in position about the propeller to protect the propeller from debris and to prevent human contact with the rotating propeller. The guard is designed to shed weeds and other debris, and prevent weeds and other debris from becoming entangled on the guard and with the propeller.

A system for preparing a polymeric mixture includes: a containment device configured to distribute dry polymeric materials; a receiving chamber in fluid communication with the containment device; a wetting bowl; a dispersing channel; and a mixing chamber connected to the dispersing channel. A method of preparing a polymeric mixture includes distributing water and dry polymeric materials through the various components of the system and mixing the materials with the mechanical mixing device.

A substrate processing apparatus includes a chamber, a manifold including a tubular portion above the chamber, first and second introduction pipes provided on a side surface of the tubular portion, and a gas guide portion to guide, in a direction opposite the chamber, gases introduced from the first and second introduction pipes into the tubular portion, and then introduce the gases into the chamber. The gas guide portion does not contact a top of the manifold, and the manifold includes a space above the gas guide portion to allow the gases to flow from between the gas guide portion and the tubular portion into a space surrounded by the gas guide portion. The gas guide portion advantageously enables the gases to broadly diffuse and uniformly mix, increasing the quality of a film formed on a substrate inside the chamber.

A mixer base assembly for use with a mixing vessel, and a method of using the mixer base assembly, are disclosed.

An apparatus to prevent formation of a vortex has a ring-shaped gasket having a bottom surface and a top surface; and a blade assembly mounted on the top surface and comprising a center portion and plural blades of a defined height. Each of the blades extend from the center portion to the top surface, with each pair of the plural blades defining a filter based at least in part on spacing between the pair of plural blades.

Embodiments of the present disclosure involve methods, devices, and systems for hydrating polymers using multiple mixing chambers. Adjacent mixing chambers may be coupled using an under-over baffle, and each mixing chamber may be generally rectangular with rounded corners.

A system for dissolving gases in water comprises a mixing chamber that holds gas and a container in fluid communication with the mixing chamber. In operation, the mixing chamber is flooded to purge the ambient air. A gas delivery system introduces gas into the mixing chamber to push the water out. A pump then pumps temperature and salinity-treated water into the mixing chamber, and a distributor sprays or disperses the water into the mixing chamber. An optional impingement plate and/or mixing medium trap gas bubbles and hold gas-saturated water within the mixing chamber. This produces a volume of substantially bubble-free, highly-saturated gas-infused water that is then released into the container to mix with the water contained therein. This system can be incorporated in aquariums, ice chests, buckets, and live wells found on boats, kayaks, trucks, and other transports.

A mixing inclined belt conveyor capable of mixing particulate material, specifically wet, freshly treated plant seeds for agricultural purposes. Inserting a plurality of mixing baffles into the stream of the particulate material induces a backflow of the particulate material. In the case of wet, freshly treated plant seed, this backflow causes a mixing, polishing, and drying of the plant seed. The mixing distributes the seed treatment into an even coat by rubbing the individual seeds of the seed flow stream together. The mixing baffles are oriented to induce backflow and sideways lateral movement and may incorporate a passage to allow increase material flow rate.

A conveyor having a conveyance structure, belt, and gas manifold. The gas manifold disposed within or on an exterior portion of the structure. The gas manifold having one or more manifold outlet ports to dry, condition, or treat a metered stream of seed within the conveyor. The manifold may be operably connected to a recirculating air system providing the vacuum source and pressurized air source of atmospheric or conditioned air. A filter and vacuum port may extract debris or humidity from the metered stream of seed within the conveyor. A plurality of mixing baffles may be longitudinally spaced apart through the conveyor in a laterally alternating manner to mix the metered stream of seed. The conveyor may be used to transfer, mix, dry, condition and treat the metered stream of seed between multiple stages of treatment.