SU818496A3 - Unit for continuous feeding and dosing wood mass to mass grinding mill - Google Patents

Abstract

1483748 Mixing plant SUOMEN VANU TEHDAS-FINNWAD Ltd OY 18 Dec 1974 [21 Dec 1973] 54757/74 Heading B1C Apparatus for proportioning and mixing cellulose fibres and flakes comprises apparatus (1, Fig. 1 not shown) for shredding dry sheet cellulose, a shredder (3) for mechanical woodpulp, and optionally a cutter with (6) for production waste from wood processing, respectively supplied by feeders (2, 4, 5) which may be controlled to produce a pre-selected mix. The materials are pneumatically conveyed through at least one cyclone as 7, 8 to a mixer and distributor 9 the level in which is controlled by an ultrasonic level sensor 10 which controls the motors of the feeders (2, 4, 5). The mixer 9 has fixed rods 15 and rotating arms 14, and discharges into one to four twin star-wheel metering devices 17, whence the material is pneumatically conveyed to a cyclone 20 at the top of a rectangular tube 22, at the bottom of which is a pair of rotors 31, 32 rotating in opposite senses and each having double helical projections. In a modification, see Fig. 4 (not shown) the rotors may have four stepped helical projections. They discharge to a smaller mixing roller 34 which is provided with four vanes (37, Figs. 6, 6A not shown) of e.g. balata belting. The mixture thence passes to a processing machine. The level of material in the tube 22 is controlled by a photocell 23 which controls the star-wheel metering device 17, and the tube has a door 25 hinged at 24 and struck outward blows by a hammer 29. In operation a demand from a processing machine starts the motor for the rollers 31, 32, 34 and for the hammer 29. Fall of level in the tube 22 causes the photocell device 23 to start the star-wheel metering device 17. The ultrasonic level sensor 10 then starts the material feeding devices.

Description

one

The invention relates to the production of paper, namely to the machining of fiber raw materials, and can be used in the pulp and paper industry.

A known installation comprising a pulping mechanism for pulp sheets, a pulping mechanism for pulping, a dispensing mechanism with a mixer.m, cyclones, a means for mass loading, a vertical buffer bin connected in the upper part with a means for mass loading, and in the lower part with a means for mass distribution 1.

. The main disadvantage of this installation is that it is not efficient enough in operation.

The chain of the invention is an increase in the efficiency at work.

This goal is achieved by the fact that the vertical buffer bunker has a door hinged on one of its walls and means for creating 25 Shocks against the wall of the bunker, made in the form of a camshaft and compression springs, and means for distributing the masses of mass is located directly under the door. and consists of two dachnits in opposite directions of the guide rollers with spiral blades and a mixing roller installed under them.

FIG. 1 shows the proposed installation, in the plan; on league. 2 - part of the installation in axonometry; on league. 3 buffer bunker.

The installation comprises a pulping sheet grinding mechanism 1, a grinding mechanism of a wood mass, a distributing mechanism 3 with a mixer 4, cyclones 5 and 6, means 7 for loading mass and a vertical buffer bin 8 connected in the upper part with means 7 for loading mass, and in the lower part, with a means for mass distribution.

The bunker 8 has a door 9, hinged on one of its walls, and means for creating door strikes against the wall of the bunker, made in the form of a cam shaft 10 and compression springs 11. The mass distribution means is located directly under the door and consists of two opposing directional rollers 12 and 13 with spiral vanes and a mixing roller 1D installed underneath them. The bunker also contains a pipe 15.

The installation works as follows.

From the pulp milling mechanism 1 and the pulp milling mechanism 2, the raw material is fed to the distribution mechanism 3 via cyclones 5 and b, in which the amount of material content is regulated. Mixer levers 4 ,. which rotates at the bottom of the distributor mechanism 3, they evenly distribute the mixture of the starting material. A dosed mass feed is carried out to the mass loading means 7 connected to the vertical buffer bin 8 of the mill for grinding the mass. Approximately in the middle, the buicker has a hinged door that experiences outward-facing shocks, the frequency of which is up to 200 per minute. The guide rollers 12 and 13 feed the mass to the mixing roller 14. From there, with the air flow, it enters the tube 15, which communicates with the hammer mill.

The proposed installation is quite effective in operation.

Claims (1)

1. Drawing: company Metorg, Germany, № 8967, 1972. I l-t-l I P Ptri.J cPN number -te /