A feed-mixing device for receiving, mixing and dispensing animal feed includes a frame with a mixing bin for receiving and mixing the animal feed therein and dispensing it therefrom, at least one mixing device rotatably drivable in the mixing bin using a drive, in particular a vertical mixing auger, for mixing the received animal feed, and a weighing device for determining the weight of the animal feed received in the mixing bin, comprising N weighing elements, with N≥2, each of which emits a weighing signal, and a control system for controlling the feed-mixing device and for processing the weighing signals from the weighing elements to produce the determined weight. The control system is configured to perform an, in particular fully automatic, calibration action of the weighing elements. The calibration action includes driving the at least one mixing device, reading out the respective weighing signal of each of the N weighing elements in each of M different positions of the mixing device, with M≥N, calibrating the weighing elements on the basis of the read-out weighing signals, wherein the calibrating at least includes determining a respective correction factor for the weighing signal of each weighing element by analysing the read-out weighing signals of all weighing elements. Thus, all weighing elements may be calibrated without having to detach the weighing elements, which provides very reliable weight measurements in a very simple manner.

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.

A stirrer is provided that can more efficiently achieve shearing applied, by an action of an intermittent jet flow, to a fluid to be processed. The stirrer concentrically includes a rotor including a blade, a partition wall, and a screen, wherein: the screen includes a plurality of slits in a circumferential direction thereof and screen members located between the adjacent slit; by rotating at least the rotor of the two components, the fluid to be processed is discharged from the inside to the outside of the screen as the intermittent jet flow through the slit of the screen; the screen has a cylindrical shape having a circular cross section; an opening of the slit provided on the inner wall surface of the screen is used as an inflow opening; openings of the plurality of slits provided on the outer wall surface of the screen are used as outflow openings; and the width of the outflow openings in the circumferential direction is set to be smaller than the width of the inflow opening in the circumferential direction.

A stirring element device, in particular for mixing media with a wide range of viscosities, in particular for a polycondensation reactor, includes at least one inner stirring blade and at least one outer stirring blade which are rotatable about a common axis of rotation, wherein at least the inner stirring blade is inclined at least section-wise relative to the axis of rotation. The inner stirring blade is arranged entirely in a subregion around the axis of rotation which is equivalent to a cylinder sector with a circular sector of less than 360 as base area.

Systems for treating a viscous medium are illustrated. The systems may comprise a primary source of pressurized treatment fluid, a fluidic transfer assembly, and a helical mixing element. The fluidic transfer assembly comprises a fluidic transfer chamber and a fluid outlet. The primary source of pressurized treatment fluid is in fluidic communication with the fluid outlet of the fluidic transfer assembly via the fluidic transfer chamber. The primary source of pressurized treatment fluid is in fluidic communication with the fluid outlet of the fluidic transfer assembly via the fluidic transfer chamber. The helical mixing element comprises an interior treatment fluid passage and external injection ports. The fluid outlet of the fluidic transfer assembly is in fluidic communication with the external injection ports of the helical mixing element via the interior treatment fluid passage of the helical mixing element. The systems may be incorporated into methods for treating a viscous medium.

The invention relates to a high-concentration mixer (1) for producing a suspension (2), comprising a stationary container (3) and an agitator (8) arranged in the container axis (7), which agitator is connected to a motor via a flange (9) provided in the region of the container bottom (4), which motor is designed for rotationally driving the agitator (8) for mixing the suspension (2) provided in the container (3), wherein the agitator (8) has helical coils (11) which bring about a vertical downward flow (12) of the suspension (2) in the centre of the container (3) and a vertical upward flow (13) of the suspension (2) in the region of the container wall, wherein the flange (9) comprises at least one blade (15) provided on its circumference, which is designed for wiping the suspension (2) from the container (3) and for supporting the vertical upward flow (13) of the suspension (2) in the region of the container wall.

There is provided a stirring device including a stirring tank including an inner peripheral wall which is circular in cross section, at least one circulating impeller and at least one dispersion blade which are located inside the stirring tank and rotatable around a vertical axis independently of each other, and a guide ring disposed radially outward near the dispersion blade. The circulating impeller is disposed along the inner peripheral wall of the stirring tank, and rotates around the vertical axis to form at least a downward flow in a stirring object existing inside the stirring tank. The dispersion blade rotates to apply a shear force to the stirring object, and is disposed at a radially inner position of the stirring tank from the circulating impeller, and at a position in contact with a flow of the stirring object, which is formed by the circulating impeller.

A stirring element device, in particular for mixing media with a wide range of viscosities, in particular for a polycondensation reactor, includes at least one inner stirring blade and at least one outer stirring blade which are rotatable about a common axis of rotation, wherein at least the inner stirring blade is inclined at least section-wise relative to the axis of rotation. The inner stirring blade is arranged entirely in a subregion around the axis of rotation which is equivalent to a cylinder sector with a circular sector of less than 360 as base area.

A fluid-agitating tank assembly is disclosed. The tank assembly includes a tank filled with a fluid, and an agitator disposed in the tank so as to be at least partially immersed in the fluid and supported by the tank in a rotatable manner about an axis. The agitator includes a double helix disposed in an upper volume of the tank and adapted to act on the fluid to transform unidirectional rotation of the agitator about the axis into a bidirectional movement of the fluid in the tank towards bottom and top portions of the tank, and at least one rotary blade projecting transversally from the axis, disposed in a lower volume of the tank, and rotating about the axis to move the fluid towards at least one lateral outlet of the tank.

A feed-mixing device for receiving, mixing and dispensing animal feed includes a frame with a mixing bin for receiving and mixing the animal feed therein and dispensing it therefrom, at least one mixing device rotatably drivable in the mixing bin using a drive, in particular a vertical mixing auger, for mixing the received animal feed, and a weighing device for determining the weight of the animal feed received in the mixing bin, comprising N weighing elements, with N?2, each of which emits a weighing signal, and a control system for controlling the feed-mixing device and for processing the weighing signals from the weighing elements to produce the determined weight. The control system is configured to perform an, in particular fully automatic, calibration action of the weighing elements. The calibration action includes driving the at least one mixing device, reading out the respective weighing signal of each of the N weighing elements in each of M different positions of the mixing device, with M?N, calibrating the weighing elements on the basis of the read-out weighing signals, wherein the calibrating at least includes determining a respective correction factor for the weighing signal of each weighing element by analysing the read-out weighing signals of all weighing elements. Thus, all weighing elements may be calibrated without having to detach the weighing elements, which provides very reliable weight measurements in a very simple manner.