GB1365754A - Method and apparatus for treating textile materials - Google Patents

Abstract

1365754 Treating textiles NIELS BERGHOLTZ & CO K/B 23 March 1972 [24 March 1971] 13548/72 Heading D1L Textile material e.g. polyacrylonitrile fibres, is treated e.g. dyed or bleached or washed with liquid in a plant comprising at least two compartments or groups of compartments containing the material covered with liquid by making the liquid flow through a first set of compartments whilst blocking off the passage of liquid through the other set of compartments, opening up the passage through the other set of compartments whilst blocking the passage through the first set of compartments and continuously repeating this intermittent flow pattern during the time required for the treatment. As shown schematically in the Figure, an autoclave 1, denoted by dash-dotted lines comprises two main compartments 2 and 3 for the textile material to be treated and four further compartments 2a, 2b, 3a, and 3b. In each compartment is a material carrier 5 e.g. a perforated rod, for carrying the material to be treated. Each carrier is connected to a conduit 6, 6a, 6b, 7, 7a and 7b respectively. The conduits 6 and 7 are each connected to one port of valve 8 having three ports and the third port is connected via conduit 9 to a pump 10 driven by a motor 11. A twoway valve 12 having four ports is fitted into conduit 9 between valve 8 and the pump 10, and a return flow conduit 13 from a collecting header at the top of the autoclave is also connected to valve 12. This conduit is connected downstream of valve 12 by conduit 14 connected to the pump. Valves 8 and 12 operate automatically. In operation, chosen time intervals for switching valves 8 and 12 from position I to II are preset in monitoring device 16. As shown compartments 2, 2a and 2b are connected to pump 10 while conduits 7a, 7a and 7b to compartments 3, 3a and 3b are blocked off and thus the liquid in these latter compartments are at rest. When valve 8 is set in position II, conduits 6, 6a and 6b will be blocked whilst compartments 3, 3a and 3b will be connected to the pump and liquid flow therethrough will take place. On each occasion liquid is transferred back to pump 10 by conduit 13, valve 12, and conduit 14. For a reversal of the direction of flow of the liquid through the material, valve 12 is switched from position I to II whereby pump 10 is conducted to conduit 13 while either conduit 6 or conduit 7 is connected to conduit 14 and to pump 10, and since one of the latter conduits is always blocked off, return flow from only one group of containers can occur. Openings are provided in the bottom wall of the autoclave for introducing heating medium e.g. steam or hot water.