Provided is a pulping device. The pulping device includes a housing, a drive shaft, and an impeller assembly. The housing defines a cavity. The impeller assembly is disposed in the cavity and is configured to be driven to rotate by the drive shaft. A bottom surface of the impeller assembly is disposed opposite to an end surface of the housing, and one of the bottom surface of the impeller assembly or the end surface of the housing is provided with an annular protrusion, and the other one of the bottom surface of the impeller assembly or the end surface of the housing defines an annular groove matching the annular protrusion, and an interference-proof clearance is defined between an outer wall of the annular protrusion and an inner wall of the annular groove.

A method of making cerium dioxide nanoparticles includes: a) providing an aqueous reaction mixture having a source of cerous ion, a source of hydroxide ion, a nanoparticle stabilizer, and an oxidant at an initial temperature no higher than about 20 C.; b) mechanically shearing the mixture and causing it to pass through a perforated screen, thereby forming a suspension of cerium hydroxide nanoparticles; and c) raising the initial temperature to achieve oxidation of cerous ion to eerie ion and thereby form cerium dioxide nanoparticles having a mean diameter in the range of about 1 nm to about 15 nm. The cerium dioxide nanoparticles may be formed in a continuous process.

A device for dispersing a water-soluble polymer including a wetting cone connected at the top of same to a column metering the polymer of standard particle size, most usually by way of a metering screw, the bottom part of the cone being connected to a primary water inlet circuit that feeds an overflow, at the bottom end of the cone, an assembly including a chamber for grinding and draining the dispersed polymer, having a rotor driven by a motor provided with knives, a stator, over all or part of the periphery of the chamber, a ring fed by a secondary water circuit, the ring communicating with the chamber by way of slots for spraying pressurized water onto the stator. The slots of the stator and/or the knives of the rotor are tilted at an angle of between 20 and 80 relative to the horizontal plane of the stator.

The problem of providing a stirrer capable of more effectively shearing a fluid to be treated is addressed, by using the action of an intermittent jet stream. A stirrer is provided with a rotor having a blade and a screen, which are relatively rotated such that the fluid to be treated is discharged from the inside of the screen to the outside as an intermittent jet stream through a slit in the screen, the stirrer satisfying condition 1 and condition 2. (Condition 1) the relationship among the width b in the rotating direction of a tip part of the blade, the width s in the circumferential direction of the slit, and the width t in the circumferential direction of the screen member is b2s+t. (Condition 2) the relationship between the width b in the rotating direction of the tip part of the blade and the maximum inner diameter c of the screen is b0.1c.

An improved immersion blender generally consisting of a motor, an elongated motor shaft that extends from the motor through a removable tubular guard to a back-to-back radial-flow cutter blade. The cutter blade is securely attached to the distal end of motor shaft and is housed within the tubular guard assembly. The tubular guard has a manifold at its distal end that provides side inlet and outlet ports for the blade and a lower inlet aperture through the distal annular plate of the manifold. The lower blade of the back-to-back radial-flow cutter draws liquid from the bottom portion of the container, through the lower inlet side-ports in the manifold and the aperture through the distal end of the manifold, and discharges the liquid through the outlet ports in the manifold toward the sides of container in a radial direction. The upper blade draws the liquid from the top portion of the container, through the upper inlet side-ports in the manifold, and discharges the liquid through the outlet ports toward the sides of container in a radial direction. The flow of the liquid drawn into the blades is towards the center axis of the motor shaft, and the flow of the liquid discharged from the blades is away from the center axis of the motor shaft.

A mixing unit for mixing a flow of liquid product is provided. The mixing unit comprises a stator forming a hollow sleeve, and a rotor having a circular displacement plate with two opposite sides, wherein at least one side has at least two chambers formed by a plurality of vanes extending in a direction being parallel with a longitudinal axis of the stator, wherein the rotor is arranged within the stator for rotating liquid product arranged in said chambers relative the stator. The displacement plate is tilted relative a longitudinal axis of the stator such that said at least two chambers have different volumes, and a side wall of the stator has at least one exit area comprising at least one through hole for allowing liquid product to exit the stator.

An impeller assembly for a solid-liquid mixing device, which includes an impeller body, multiple mixing blades which are evenly distributed on the inner side of the impeller body and extended outwards from the shaft of the impeller body, and at least two baffle plates being disposed on the outer side of the impeller body along a radial direction thereof outwards and disposed in the circumferential direction of the impeller body. At least one pair of adjacent two baffle plates satisfies following conditions: curves projected by two opposite surfaces of each of adjacent baffle plates on a cross section of the impeller at any height are smooth curves, and at least one of the curves is not fully included in a circle with the center of the shaft as its center.

A mixing and dispersing apparatus includes a tank body, a stirring part, a dispersing part, and a driving part. The tank body has an accommodating cavity configured to accommodate materials. The stirring part is disposed in the accommodating cavity and configured to mix the materials in the accommodating cavity. The dispersing part is disposed in the accommodating cavity and includes a first cylinder and a second cylinder. The first cylinder has a first cavity in communication with the accommodating cavity, the second cylinder is located in the first cavity, and the second cylinder has a second cavity in communication with the accommodating cavity. The driving part is connected to the stirring part and the dispersing part. The materials mixed in the accommodating cavity flow into the second cavity and flow out after being dispersed in the dispersing part.