RU14649U1 - VIBRATION MILL DRYER - Google Patents

Abstract

1. Vibratory dryer-mill, having a horizontal cylindrical body with loading and unloading hatches and with grinding bodies placed in it, mounted on elastic supports, with a heat-exchange jacket, with a central tube in which the shaft of a two-mass inertial vibrator is mounted on bearings with ends attached disks with unbalances, an electric motor and a flexible coupling, characterized in that a polydisperse medium consisting of balls and rollers of rolling bearings with defining races is used as grinding bodies zeros 10-40 mm in an equal volumetric ratio of their standard sizes. 2. The vibration-drying mill according to claim 1, characterized in that the casing is perforated in the form of radial conical holes with diameters of 3-5 mm according to the area of the discharge hatch, the larger diameter being on the outer surface of the casing.

Description

Vibratory dryer - mill.

The utility model relates to devices for deep drying of materials with the concomitant: grinding and vigorous stirring for instrumental implementation of the method for producing powders from plant materials according to patent No. 2064477 IPC С 09 В 61/00, 1996. A vibration mill-dryer (HSR) can be found application in the chemical, pharmaceutical, agricultural and writing industries. It can be used for grinding mineral salts; grinding dried vegetables, fruits, berries; drying powders; mixing powders of solid weigh; substances, including during concomitant grinding, grinding and drying; mixing powders of solid substances with liquid phase.

Known vibration dryer for bulk materials, see.with. No. 2079802 IPC F 26 V 17/30, 1997, consisting of a drying chamber mounted on elastic supports, a vibratory drive, the elastic elements being made in the form of cantilever mounted beams on the supports, on the console part of which the drying chamber is movably fixed, and the supports are made in in the form of cylindrical rollers installed with the possibility of movement. However, such a dryer does not exclude the II period of drying and does not allow to obtain dry powder materials from thermolabile materials.

By design, the mill closest to the utility model is a mill consisting of a cylindrical body with loading and unloading hatches, with grinding media housed in it, and a vibration exciter; spring or rubber supports are supported by a support frame, and the machine is driven by an electric motor through an elastic

MPKR26V 17/30 MPKV02S 19/16

coupling, connects the motor shaft to the shaft of the exciter, see book. Sidenko P.M. Grinding in the chemical industry. M .: Chemistry. 1977 Tab. 27, p. 235. However, such a design does not allow for drying, grinding and mixing processes combined in time.

The purpose of the utility model is to increase the efficiency of the drying process of the material and shorten the drying time when obtaining dry powders.

This goal is achieved by the fact that in a vibratory dryer a mill having a horizontal cylindrical body with loading and unloading hatches and with grinding bodies placed in it, mounted on elastic supports, with a heat exchange jacket and a central pipe in which the shaft of a two-mass inertial vibrator with bearings is placed discs with unbalances, an electric motor and a flexible coupling fixed at the ends; as grinding media, a polydisperse medium is used, consisting of balls and rollers of rolling bearings, with determining dimensions of 10-40 mm in an equal volume ratio of their standard sizes. In addition, the housing over the area of the discharge hatch has a perforation in the form of radial conical holes with a diameter of 3-5 mm, with a larger diameter falling on the outer surface of the housing.

The utility model is illustrated by the drawing, which shows the design of a vibration dryer - mill (Fig. 1).

Vibratory dryer - mill consists of an oscillating body, a vibrator and a drive (figure 1). The housing 1 with a central pipe, a discharge hatch 4 and a heat exchange jacket has the shape of a cylinder. The housing cover 2 has a loading hatch 3 and a heat exchange jacket. Oscillations of the body are provided by a two-mass inertial vibrator 6. The housing is mounted on elastic supports 7, which are dual compression springs. The vibrator shaft is connected to the electric motor 9 by means of a flexible coupling 8, which is a pressure hose with

double metal braid. The electric motor is mounted on a welded frame 10 (frame). Grinding bodies 11 are balls and rollers of rolling bearings with dimensions of 10-40 mm and occupy half the body volume. On the housing 1 and the cover 2 there are nipples for supply and removal of coolant (TH). On the cover of the loading hatch 3 there is a nozzle for evacuation (VAK), and a multilayer filter is fixed on the inner surface. An unloading sleeve 5 is fixed on the unloading hatch 4 to reduce dusting during unloading.

The vibration dryer-mill works as follows: The washed and pre-prepared raw materials are loaded into the apparatus, the grinding media are loaded there from the calculation of the grinding media: the processed raw materials, in the ratio 1: 1 with the housing filling factor equal to 1. The coolant supply system is turned on first (t 80 ± 1s) into the jacket of the apparatus, the evacuation system, the drive motor of the dryer-mill and carry out the drying process while grinding and mixing the processed raw materials in a vibration field. After completion of the process, the powder is discharged through the discharge hatch 4. At the same time, the grinding bodies remain inside the casing, thanks to the special design of the casing: the casing 1 is non-perforated in the form of radial conical holes with a diameter of 3-5 mm over the area of the discharge hatch 4, with a larger diameter falling on the outer surface of the casing. This allows you to separate the powder from the grinding media that remain in the housing.

Vibration exposure increases the surface of moisture evaporation due to the grinding effect of grinding media, evens out moisture and temperature in the entire volume of the load due to the mixing action, which allows the drying process to be carried out exclusively in the first most intensive period.

locc.c (,

In this case, the optimal vibration parameters, providing the maximum speed of mixing, grinding and drying, are determined from the following ratios:

Fr 8.11 g

P, () -10D

where Fr is the Froude criterion;

P, - parametric criterion;

And - the amplitude of the oscillations of the body, m;

D is the inner diameter of the housing, m;

with - the angular frequency of the oscillations, rad / s;

g - acceleration of gravity, m / s.

Due to the fact that the grinding bodies are a polydisperse medium, there is an increase in their impact points between themselves and the body during vibration of the latter, which leads to an intensification of the grinding process.

Investigation of the drying process in the BCM and the production of powder from plant materials (potato, onion, blackcurrant, chokeberry) showed that the contact drying rate in the BCM increases by 1.52 times due to vacuum compared to drying at atmospheric pressure and by 3-4 times with concomitant grinding compared to drying without grinding.

Compiled by Z-yC-rz. Dubkova

Claims (2)

1. Vibratory dryer-mill, having a horizontal cylindrical body with loading and unloading hatches and with grinding bodies placed in it, mounted on elastic supports, with a heat-exchange jacket, with a central tube in which the shaft of a two-mass inertial vibrator is mounted on bearings with ends attached disks with unbalances, an electric motor and a flexible coupling, characterized in that a polydisperse medium consisting of balls and rollers of rolling bearings with defining races is used as grinding bodies zeros 10-40 mm in an equal volumetric ratio of their standard sizes. 2. The vibration dryer-mill according to claim 1, characterized in that the housing according to the area of the discharge hatch has a perforation in the form of radial conical holes with diameters of 3-5 mm, with a larger diameter on the outer surface of the housing.