SU1237451A1 - Installation for separating synthetic rubbers from hydrocarbon solutions - Google Patents

Description

The invention relates to chemical engineering, in particular to installations for separating synthetic rubbers from hydrocarbon solutions.

The aim of the invention is to reduce the ash content of rubber crumbs and increase the reliability of the installation by reducing its fire hazard.

FIG. 1 shows the proposed installation, a general view; Fig. 2 shows an installation, an exemplary embodiment.

The installation (Fig. 1) contains sequentially installed in the course of the technological process and connected by a piping system a water degasser 1 of the first stage, a pump 2, a water degasser 3 of the second stage, a pump 4, a concentrator 5 of the crumb, squeezing worm press 6 of the first stage, squeezing worm second stage press 7, drying screw press 8, drying chamber 9 with horizontal vibrating conveyor, pressure fan 10, air heater 11, means 12 for creating a water barrier, suction fan 13, vertical vibrating plate An emulator 14, a collection of 15 water drainage units, a refrigerator 16, pumps 17 and 18. At the same time, the output head of the drying press 8 is introduced into the drying chamber 9, the output stream of which is connected to the vertical vibrating elevator 14, the inlet pipe of the hot air drying chamber 9 is connected through the heater 11 with the pressure fan 10, and the outlet of the steam-air mixture of the drying chamber 9 is connected to the inlet of the means 12 for creating a water barrier, which is connected with the suction fan 13 by its outlet nozzle. at 12 to create a water-barrier, connected through a condenser 16 and a pump 17 to the hub 5 crumbs, and also with a collection of 15 water drainage installation which is associated conduit and the pump 18 to the hub 5 crumb.

The means for creating a water barrier can be made in the form of a counter-flowing irrigation column 19 with a plate separator 20 in the upper part of the column (FIG. 1) or in the form of a bubbling apparatus 21 with a separator 22 (FIG. 2).

The installation (FIGS. 1 and 2) works as follows.

The polymer (a rubber solution in an inert hydrocarbon solvent) enters the degasser 1, where it is treated with hot water and steam, resulting in a porous rubber crumb, as well as solvent and water vapor, which are removed from the degasser 1 to condense

and separation. The rubber crumbs with water are taken from the degasser 1 by pump 2 and fed to the second stage degasser 3, where the crumb is degassed and pump 4 is fed to the crumb concentrator 5. In the latter, the crumb is separated from the main mass of water and transferred to a successively installed first-stage squeezing press 6 and a second-stage squeezing press 7 and then to a drying worm press 8. In the squeezing presses 6 and 7, a mechanical squeeze occurs from the mainstream crumb. The discharge pipeline discharges 15 water drains into the collection.

Squeezing and overheating in the drying screw 8, the crumb is throttled through the press die in the drying chamber 9. At the same time, the moisture that remains in the crumb evaporates, which is transformed into superheated steam.

An air heated in the heater 11 is supplied to the die by the pressure fan 10.

The main separation of rubber crumbs takes place in the volume of the drying chamber 9, which, moving along the vibrating conveyor of the drying chamber 9, enters the vertical vibrating ram 14, from which it is sent to briquetting and packaging.

The vapor-air mixture under vacuum created by the suction fan 13 passes through the means 12 to create a water barrier and through the fan 13 and the duct system is removed from the workshop.

The water supplied to the means 12 for creating a water barrier flows into its lower part, from where it is directed to the collection 15 of the water drainage of the plant and is pumped out by the pump 18 to the crumb concentrator 5.

The flushing water is supplied to the contact water washer from the pressure line of the pump 17 through the cooler 16.

In the case of the use of a bubbling apparatus (Fig.2) as a protective barrier device, the steam-air mixture with entrained crumb from the drying chamber 9 is distributed along parallel bubblers and bubbling through a thin layer of water.

The drainage and supply of water is carried out according to the described scheme, and air is removed from the apparatus through the separator 22 of condensed moisture. The air exhaust is provided with a suction fan 13.

In the event of a fire in the drying chamber 9, the flame is ejected from it into the means 12 for creating a water barrier (Fig. 1.2), where the flame will be cooled and eliminated. Thus, the fire will be localized in the volume of the drying chamber.

Claims (3)

1. PLANT FOR ISOLATING SYNTHETIC RUBBERS FROM HYDROCARBON SOLUTIONS, containing water degassers, crumb concentrator, crushing worm presses, worm drying press, drying chamber with horizontal vibratory conveyor and hot air conveyor, equipped with a system of pipelines, sequentially installed during the technological process and connected by a pipeline system water vapor, vertical vibrator, em < --------> --------- [b / ElkldP 7 V bone for collecting and returning to the water drainage cycle, pumps for pumping water and water pulp, characterized in that, in order to reduce the entrainment of rubber crumb and increase the reliability of the installation by reducing its fire hazard, in the hot air suction system between the drying chamber and the suction a means for creating a water barrier is installed by the fan, the inlet pipe of which is connected by a pipe to the outlet pipe of the drying chamber, and the outlet pipe is connected to a suction fan, the means for creating a water barrier with It is integrated with the pressure line of the circulation pump for pumping water from the crumb concentrator by piping through the refrigerator. 2. Installation according to π. 1, characterized in that g that the means for creating a water barrier is made in the form of a countercurrent column of irrigation type with a plate separator in the upper part of the housing. 3. Installation according to π. 1, characterized in that the means for creating a water barrier is made in the form of a bubbler with a separator in the upper part of the housing. SU. ,,, 1237451