SU1219410A1 - Arrangement for modelling processes of treating loose materials on screw extruder - Google Patents

Description

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The invention relates to mechanical engineering, in particular to screw extruder designs.

The purpose of the invention is to increase accuracy.

Fig, 1 shows the proposed installation, a general view; figure 2 - section aa in Fig, 1.

The installation includes a feeder I, a screw extruder 2 with loading, mixing, squeezing and extruding zones and a drive housed in housing 3, in the upper part of which a longitudinal through groove 4 located between the loading and extruding zones is made. On the extruder body 3, a gas outlet unit 5 is hermetically mounted, consisting of a hollow cylinder b installed rotatably around a longitudinal axis. A through screw groove 7 is made in the wall of the cylinder b. Outside the cylinder 6, a scale 8 is installed with an arrow for recording the position of the gas exhaust unit 5, graduated for the length of the cylinder 6 from the loading zone to the extrusion zone, and the handwheel 9 for controlling the position of the gas exhaust unit 5, The installation is equipped with devices for measuring process parameters: the temperature of the feed material, its flow rate, the amount of emitted gas, etc. (not shown).

The extrusion head 10 of the extruder 2 is formed by the rollers 1 and the housing 3. In the discharge zone 12, the forming rollers 13, the rotary valve 14 and the sampler 15 with the sector valve 16 are installed. Between the extrusion head 10 and the forming rollers 1 3, the guide table 17 is installed.

There is thermal insulation 18 outside the installation casing.

The installation works as follows.

The coal, heated to the desired temperature, is fed to the feeder 1 in

102

screw extruder 2, in which it successively passes the mixing, compressing and extruding zones. From the extrusion head 10, the plasticized material flows along the guide table 17 into the forming rolls 13 to form the molds.

Rotary valve 14 in position

B provides the arrival of coal moldings for unloading. If sampling is required, valve 14 is set to position B and sector valve 16 of sampler 15 opens,

In order to study the dynamics of the gas section, the cylinder 6 of the gas exhaust unit is set to the desired position by turning the handwheel 9,

for example, by the indication of the arrow on the scale of the recording device.

At the same time, a certain part of the groove 7 of the cylinder 6 is aligned with the groove 4 of the housing and through the

the window transfers gases, accumulating: cix in the test section of the extruder 2, into the cavity of the cylinder 6 to measure its quantity. Since the groove is 7 cylinder 6

located along a helical line, then rotating it around the longitudinal axis ensures the formation of windows for the flow of gas anywhere in the extruder

which allows to determine the gas evolution dynamics in all its areas and the critical situation (in which the maximum gas emission is recorded), a critical situation indicates a decrease in the extruder's performance, which is then determined by reducing the mass of the molds in the sample taken per unit time at a constant feeder 1.

Technical and economic efficiency in the implementation of the invention is achieved by expanding technological capabilities.

Claims (1)

INSTALLATION FOR MODELING PROCESSES OF PROCESSING OF BULK MAT- RIALOV ON A SCREW EXTRUDER, comprising a housing with loading, mixing, compression and extrusion zones, a device for measuring process parameters and a gas outlet assembly, characterized in that, in order to improve accuracy, the gas outlet assembly is made in the form of a hollow cylinder with a through screw groove on its outer the surface, and in the housing parallel to its longitudinal axis between the loading and extrusion zones, a through groove is made, while a hollow cylinder is mounted above the extruder body with the possibility of rotation about its central hydrochloric axis. 'f 1 12