SU649588A1 - Apparatus for regenerating fibrous waste of thermoplastic polymers - Google Patents

Description

one

The invention relates to equipment for the regeneration of waste from thermoplastic polymers and can be found at enterprises for the production of chemical fibers and plastics.

A known apparatus for the regeneration of fibrous wastes of thermoplastic polymers, comprising a melting chamber with a perforated insert and a charging device and a gaseous coolant supply system 1.

The disadvantage of this installation is the significant thermal and thermal oxidative destruction of the materials being processed due to the C01 melt cycle of the polymer with heated surface, which prevents the formation of a secondary polymer with volOC-forming properties.

The purpose of the invention is to improve the quality of the polymer by preventing its destruction.

For this, the proposed installation is equipped with a conical pre-heat treatment hopper connected to the loading device, in which hollow tubular thermostatic heaters are installed at the entire height along its walls, the diameter of the loading opening of the fusion chamber being equal to the diameter of the outlet opening of the heating insert.

The loading device is made in the form of an ischek installed in a housing with a conical output part located coaxially with a perforated fused chamber insert. In the gap between the perforation insert and the wall of the melting chamber, horizontal partitions are installed, the cavities between which are communicated with the iodachi gas carrier system.

Such a design prevents the product from being degraded, which ensures high quality polymer.

On fpg. 1 is a diagram of the installation; on phpg. 2 - preliminary heat treatment bunker.

The fibrous waste regeneration plant contains a 1I chambered camera 1 with a clavicle, equipped with a perforated insert 2, which serves to evenly distribute the inert gas heated in the electric furnace 3, and nitrogen nitrogen. To ensure efficient heat exchange between the fiber and the coolant gas, the perforated insert has a conical shape,

moreover, in the upper part the diameter of the insert 2 is maximum,

To the perforated insert, from the outer side, horizontal partitions 4 are inclined, which divide the space between the wall of the melting chamber of the perforated insert into several sections, the hollows of which communicate with the heat carrier gas supply system.

The heated gas is supplied tangentially in one or more sections, which makes it possible to control the distribution of hot inert gas along the height of the melting chamber.

The outer jacket of the melting chamber 1 serves to eliminate heat loss of inert gas through the walls of the chamber and is heated by means of an organic heat transfer fluid entering and exiting through the fittings 5.

In the upper part of the melting chamber 1, a loading device is installed, made in the form of a screw 6 mounted in the housing 7 with a conical outlet part located coaxially with the perforated insert 2 of the melting chamber 1. Corus 7 is equipped with a jack for cooling with compressed air, which makes it possible to maintain a certain temperature of the walls of the housing 7 at any temperature conditions of the melting chamber. The diameter of the inlet of the melting chamber is made equal to the diameter of the outlet of the perforated insert.

The installation is equipped with a pre-heat treatment cone-shaped bunker 9 connected to the loading device, in which hollow tubular thermostatically mounted nanorules 10 are installed along the entire height along its walls 10. The bunker 9 is equipped with a split-section 11 divided into two sections. The bottom section is supplied with nitrogen and then into the bunker through the perforations in its walls. The upper section is designed to utilize the heat of the spent nitrogen from the melting chamber 1.

In the lower part of the melting chamber, an unloading pin 13 is provided, which is short and is calculated so as to remove the melt coming from chamber 1 of the melt at maximum speed and to create the necessary support to feed the polymer to the molding. The screw housing 14 is heated to maintain the desired melt temperature. In the unloading part of the body of the screw, fastening 15 is provided for the die set (when molded into the core or tape).

When the polymer is molded into fiber, the metering pumps of the spinning heads are connected to the discharge part of the screw body 14 by means of a short melt line (not shown in the figures).

The setting is as follows.

Llepexi, the start of the waste recovery process includes the installation heating system. Upon reaching the set temperature, the installation starts loading the zones. Coming into the bunker During the preliminary heat treatment, the fibrous material is subjected to hot and inert gas treatment and drying.

In the case of processing of oily fiber, the main part of the sizing agent is removed here.

Due to the presence of thermostated guides in the pre-heat treatment bunker, the fibrous mass does not touch the hot walls of the bunker, which prevents polymer degradation.

The heat-treated and dried fibrous mass continuously arrives at the charging pinch 6 and is bundled into the melting chamber 1 through the conical portion of the housing 7.

The charging pinch 6 serves not only to transport the plastic fibrous mass from the preliminary heat treatment bin 9 to the fusion chamber 1, but also to protect the bunker from getting the bulk of the nitrogen from the melting chamber.

In the process of advancing inside the perforated insert 2, the fibrous mass in the current of hot inert gas is released.

Since the diameter of the perforation insert 2 is larger than the diameter of the loading opening of the melting chamber, and hence of the diameter of the tow, the fibrous mass and the resulting melt do not touch the walls of the perforated insert 2 over the entire height of the melting chamber 1, which makes it possible to eliminate polymer degradation.

The proposed installation allows to obtain high-quality secondary polymers with fiber-forming properties.

Claims (3)

1. An apparatus for regenerating fibrous wastes of thermoplastic polymers, comprising a melting chamber with a horned insert and a charging device and a gaseous heat carrier supply system, characterized in that, in order to improve the quality of the polymer by preventing its destruction, it is equipped with a cone-shaped hopper attached to it to prevent its destruction. heat treatment, in which hollow tubular thermostatic nanovatings are installed along the entire height along its walls, with the loading diameter LfTetanus melting chamber openings formed equal to the diameter of the outlet of the perforated insert. 2. The installation according to claim 1, characterized in that the loading device is made in the form of an auger mounted in a housing with a conical output part located coaxially with the perforated insert of the melting chamber. 3.Installation according to claim 1, from lich ayusch and the fact that in the gap between the perforated horizontal walls are installed by the insert and wall of the melting chamber, the cavities between which are connected to the heat carrier gas supply system. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 483270, cl. B 29 B 3/02, 1971.