SU1711968A1 - Roller mill - Google Patents

Abstract

The invention relates to a roller mill, preferably for grinding wet materials. The goal and ^) bretei is to increase the efficiency of drying: wet material, increase productivity, and reduce energy intensity. The mill includes a housing 1 with a duct supply of primary ventilating air 2, a rotating table 3 with a grinding track 4, rolls 5 with a pressing system, a pipe for supplying raw material 6 and a device for supplying secondary air 7 in Ø1de installed distributor 9 with nozzles 10c circular section, located between the rolls so. so that their meter decreases in the direction of rotation of the table. 2 Il.

Description

The invention relates to a roller mill, preferably for grinding wet materials.

A whole of the invention is to increase the drying efficiency of wet material, increase productivity and reduce energy intensity.

FIG. 1 schematically shows a mill, a general view; in fig. 2 - the same, roptftaem the cut.

The mill consists of a housing 1 with a fan box for ventilating air 2, a rotating table 3 with a belt track 4, rolls 5 with a press system (not gukvzano), a supply pipe for waste material 6, a pipeline for supplying secondary air 7 with an automatic valve 8, a distributor for 9 seconds the holes 10, # i a meter, are reduced in each gap between the rollers in the direction of rotation of the table.

The mill operates as follows. The source material through pipe b is fed into the mill, gets into the rotating track 4 of table 3, is pulled under the rolls 5 and is crushed under the action of the forces created by the pressing system.

The secondary air through the pipe 7 opens the valve 8 and is supplied to the distributor 9 and through the holes in the distributor is fed to the grinding table and provides drying and removal of the ground particles in the direction of the annular gap between the housing 1 and the table 3, where they are picked up by the flow of the primary ventilator. The material coming out directly from the roll is affected by air coming out of the hole 10 in a larger diameter spout, while the velocity of the outgoing air is high enough, but it is large enough (enough to dry the material and provide its partial removal. As the material moves from the roll to the shaft, the diameter of the holes in the distributor decreases, with this, the volume of exhaust air decreases, but

its speed, which contributes to the accelerated exit from the table of ground and sufficiently dried material.

This provides an increase in the efficiency of drying the material, an increase in productivity, by increasing the rate of removal of the ground material, as well as reducing energy intensity, by reducing the number of times the ground material falls under the rolls.

Claims (1)

Claims of Inventions Valkov mill, containing a box with a supply duct of primary ventilating air, a rotating table with a grinding track, rolls with a pressing system, a nozzle supplying the source material and a device for supplying secondary air to View of dispenser mounted above the table with nozzles, characterized in that. that, in order to increase the drying efficiency of the wet material, increase productivity and reduce energy consumption, the nozzles have a circular cross section of different diameters and are located between the rollers, and their diameter in each gap decreases in the direction of rotation of the table. .. Material feed / G Fig, 1 O Phases. 2