A static mixing module for mixing of material includes an inlet end and an outlet end, between which a longitudinal axis extends. A plurality of angularly spaced mixing channels extendingbetween the inlet end and the outlet end, each two adjacent mixing channels being separated by an intermediate wall. At least one mixing element is provided within each mixing channel. Each intermediate wall has a uniform or an essentially uniform wall thickness (t) as measured in a plane perpendicular to the longitudinal axis. A steam heater is also disclosed which comprises said static mixing module.

A mixing paddle is comprised of a compound, integral center shaft, a rim, a first plurality of parallel blades and a second plurality of parallel blades. The compound, integral center shaft bisects the rim, creating a first side of the rim and a second side of the rim. The first plurality of parallel blades is disposed between the compound, integral center shaft and the first side of the rim. The second plurality of parallel blades is disposed between the compound, integral center shaft and the second side of the rim. The first plurality of parallel blades is orthogonal to the second plurality of parallel blades.

The invention provides a method of operating a batch mixer for producing first and second numbers of mixtures from first and second numbers of batches of materials to be mixed in the batch mixer, the batch mixer comprising a mixing chamber, a mixing element disposed within the mixing chamber, the mixing element and the mixing chamber being configured for providing an identical flow of the materials to be mixed within the mixing chamber and around the mixing element regardless of in which of the first and second opposite directions the mixing element is rotated, and a motor assembly coupled to the mixing element for rotating the mixing element for mixing the first and second numbers of batches of materials to be mixed for producing the first and second numbers of mixtures. The method comprises the steps of energizing said motor assembly for rotating said mixing element in said first direction, for each one of the first number of batches of the materials to be mixed: loading the one of the first number of batches of materials to be mixed into the mixing chamber, mixing the one of the first number of batches of materials for producing one of the first number of mixtures, and removing the one of the first number of mixtures from the mixing chamber, energizing the motor assembly for rotating the mixing element in the second direction, and for each one of the second number of batches of the materials to be mixed loading the one of the second number of batches of materials to be mixed into the mixing chamber, mixing the one of the second number of batches of materials for producing one of the second number of mixtures, and removing the one of the second number of mixtures from the mixing chamber.

A stirrer is provided such that a fluid being processed can be more efficiently shown by way of the action of an intermittent jet flow and processing capacity can be improved. The stirrer concentrically includes a rotor that includes a plurality of flat vanes and that rotates, and a screen that is place around the rotor. The screen includes a plurality of slits in the circumferential direction thereof, and screen members that are positioned between adjacent slits. The fluid being processed is discharged by rotation of the rotor from the inside of the screen to the outside as an intermittent jet flow through the slits. The width of the distal working face on the distal end of the vane in the rotational direction is smaller than the width of the basal end of the vane in the rotational direction.

The present disclosure relates to a process for the preparation of polyethylene by polymerizing in a slurry ethylene and optionally one or more C.sub.3 to C.sub.10 alpha-olefins. In some embodiments, the polymerization is carried out in a cylindrical polymerization reactor equipped with an agitator for mixing the contents of the reactor and inducing a flow of the slurry, the ethylene is fed into the reactor by an ethylene injection system comprising one or more injection nozzles which project through the bottom reactor head or through the reactor wall and extend from 0.02-0.5 times the inner diameter D into the reactor, and the ethylene exits the injection nozzle with an exit velocity from 10-200 m/s.

An apparatus for mixing wash water and crude oil includes a crude oil pipe, a wash water manifold, a plurality of conduits, and a flow controller. The crude oil pipe includes a wall having an interior surface, an exterior surface, and a plurality of wash water injectors. The plurality of wash water injectors are angularly distributed on a circumferential band of the wall of the crude oil pipe. The flow controller is operable to regulate wash water flow through the plurality of conduits. Each of the plurality of wash water injectors is fluidly coupled to the wash water manifold by one of the plurality of conduits. The plurality of wash water injectors are arranged to provide mixing of the wash water and the crude oil when the wash water is injected into the crude oil pipe through the plurality of wash water injectors.

A premixing apparatus has a butterfly valve provided in an air supply passage, a zero governor and a variable throttle valve interposed in a gas supply passage. A control is performed to switch a combustion capacity between at least two stages of a large-capacity stage and a small-capacity stage through change in opening degrees of the butterfly valve and the variable throttle valve. At the small-capacity time, in case the opening degree of the variable throttle valve, when regulated so that the λ becomes a predetermined value, has been changed more to the small-opening-degree side than the predetermined small-capacity opening degree, in a state in which the opening degree of the variable throttle valve has been returned to the predetermined small-capacity opening degree, the opening degree of the butterfly valve is regulated such that the λ becomes the predetermined value, and the small-capacity opening degree of the butterfly valve is renewed to the predetermined value when the λ becomes the predetermined value.

The present disclosure relates to improved magnetic mixing assemblies and mixing system. The magnetic mixing assemblies can provide improved mixing action, ease of use, and low friction. The mixing assemblies can be adapted for use with a wide variety of containers including narrower neck containers and flexible containers.

Provided is a rotator structure of a nanomist-generating device which generates a nanomist by rotating a rotator having a conical shape, wherein a lower portion of the rotator is immersed in water and mist-scattering ports are disposed in an upper portion; the device generates a nanomist by scattering the water through the ports, the water being drawn up along an inner wall surface of the rotator by rotating the rotator; and a radius at an upper end of the ports is an upper portion radius R1, a height to the upper end of the ports from a waterline L is a drawing height H, and a mean angle between a horizontal line and the inner wall surface is a side surface mean angle θ1; and the angle θ1 is set within θ±5% of θ for θ satisfying a basic structure equation—R1 sin.sup.3θ+2 H cos θ sin.sup.2θ+H cos.sup.3θ=0.

The invention relates to an agitator for mixing of fluids with different viscosities, wherein the agitator has a main shaft rotatable about an axis of rotation and paddles supported by the main shaft, each paddle comprising a paddle shaft extending at an angle relative to the axis of rotation of the main shaft ranging between 20° and 40°, and the paddles being arranged around the main shaft spaced by an angle of 90° relative to one another, and the paddles with the agitator being rotatable about the axis of rotation of the main shaft and also about the respective paddle shaft axis, wherein a radial first distance of the paddle shaft axes relative to the axis of rotation at a lower end of the paddle shafts facing away from the main shaft is larger than a radial second distance of the paddle shaft axes relative to the axis of rotation at an upper end of the paddle shafts facing the main shaft.