SU896128A1 - Classifier of fibrous suspension - Google Patents

Description

(5) SORTING FIBER SUSPENSION

one

The invention relates to the pulp and paper industry and can be used for sorting fiber suspensions.

The known sorting includes a housing with nozzles for supplying the fiber suspension and withdrawing the sorted suspension and waste, the sieve drum and the hydrodynamic rotor with vanes fl.

A disadvantage of the known device is its high energy intensity.

The purpose of the invention is to reduce the energy intensity of sorting.

The goal is achieved by the fact that in the sorting of fibrous suspensions, including a housing with nozzles for supplying a fibrous suspension and withdrawing a sorted suspension and waste / sieve, and a rotor with hydrodynamic blades, the ends of the latter are cut at an angle of mainly 5 to 20 ° to the perpendicular plane. the rotation axis of the rotor, the cutting planes from the leading edge of the blade profile in both facing, are directed towards the removal of waste, and the cut angle of the blade end, located on the side of the suspension supply, is 3 bigger than the angle cut end, located on the side of waste removal.

FIG. 1 shows a sorting, longitudinal section; in fig. 2 - n-

10, A-A in FIG. one; in fig. 3 view B in FIG. one.

Sorting the fibrous suspension includes a housing 1 with connections for supplying the fibrous suspension 2 and

15 removal of the sorted suspension 3 and waste, the sieve drum 5 and the rotor 6 with hydrodynamic blades 7, the ends of which 8 are cut off at an angle of 5 to the plane, —perpene 20 of the rotational axis of rotation of the rotor 6, and the planes of the cut are directed from the front edge 9 of the blade 7 to side of waste disposal. Sorting works as follows. The suspension fiber through the pipe 2 under pressure is fed into the housing 1 and is sorted in the space between the screen drum 5 and the rotor 6. The conditioned fraction of the suspension passes through the perforations of the screen drum 5 and is removed from the screen by pipe 3. Waste screening is deposited on the inner surface The sieve drum 5, is removed from it by the action of the hydrodynamic blades 7 and, moving along the sieve drum 5, is removed from the screen by the nozzle. Due to the fact that the ends of the blades 7 are cut at an angle of 5-20, the direction of movement of the suspension in sorting coincides with the flat cut of the end face 8. This eliminates the turbulization of the suspension at the ends of the blade 7, which reduces the energy intensity of the process. Making the angle o (. Cut the end face 8 of the blade 7, located on the side of the suspension supply, is 3–10 ° more than the corner of the end of the end face 8 of the blade 7, located on the side of waste disposal, allows to optimize the process of waste disposal, by excluding them n & dsos in the sorting zone.

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Put.t claims 1. Sorting fiber suspension, including a housing with connections for supplying fiber suspension and removal of sorted suspension and waste, sieve drum and rotor with hydrodynamic blades, which, in order to reduce the energy intensity of sorting, the ends hydrodynamic blades are cut at an angle to the plane perpendicular to the axis of rotation of the rotor, and the cut planes from the leading edge of the blade profile at both ends are directed toward waste disposal, 2. Sorting according to claim 1, tl and h u and in that the angle of the blade is cut end. 3. Sort by PP.1 and 2, that is, so that the cut angle of the end of the blade, located on the side of the supply of suspension, is 3 10 more than the cut angle of the end, located on the side of waste disposal. Sources of information taken into account in the examination 1. US patent M ° 3029951, cl. 210-298, 1963.

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Fig, 1

Claims (3)

Claim 1. Sorting of the fibrous suspension, including a housing with nozzles for supplying the fibrous suspension and discharging the sorted suspension and waste, a sieve drum and a rotor with hydrodynamic blades, characterized in that, in order to reduce the energy consumption of sorting, the ends of the hydrodynamic blades are cut at an angle to the plane perpendicular to the axis of rotation of the rotor, and the plane of the cut from the leading edge of the blade profile at both ends is directed towards the waste. 2. Sort according to claim 1, characterized in that the angle of cut of the end face of the blade is 5 ~ 20 °. 3. Sorting according to claims 1 and 2, characterized in that the angle of cut of the end face of the blade located on the supply side of the slurry is 3 "10 ° greater than the angle of cut of the end located on the side of the waste.