GB629100A - Process and apparatus for the continuous after-treatment of flocculous textiles with exclusion of air - Google Patents

Abstract

Apparatus for the continuous treatment of flocculous textiles by spraying comprises a conveyer consisting of a plurality of oscillating bars in two groups and spraying devices above the conveyer, the treatment taking place in a chamber which is closed except for two liquid seals, one in the front wall and one in the back. <PICT:0629100/IV (a)/1> <PICT:0629100/IV (a)/2> <PICT:0629100/IV (a)/3> The conveyer bars are bent V-shape near the front and back wall for passing through the liquid seals. When using oxygen-sensitive treating liquids inert gases or gases of low oxygen content are preferably introduced into the chamber, and any gases removed with the treating liquid are removed and fed back into the chamber. An example is given in which staple fibres from viscose which have been coagulated but not yet regenerated to cellulose hydrate are passed on a conveyer through a liquid seal into the treatment chamber where they are treated with the regenerating-medium and the hydrogen sulphide which is liberated is sucked off. The fibres are then conveyed out of the chamber through a second liquid seal. Other examples are given in which regenerated staple fibres are treated with hot water to remove residual carbon disulphide, and in which casein fibres are bleached with sodium p hydrosulphite. In the apparatus described, the fibres are carried on a series of bars 1, 2, 3, &c. provided with teeth 17 and having oscillatory motion, which move the fibres under the liquid seal formed by the roller 11 and end wall 8, into the treating chamber 10 where they are sprayed with liquids from the baths 32, 33 and 34. The liquids from the baths 33 and 34 are drained to the vessel 40 from which liquid is pumped back to the baths 33 and 34 whilst gases which are carried over by the liquid are separated in vessel 40 and returned to the treating chamber through the pipe 45. The fibres leave the chamber through the liquid seal formed by the roller 12 and end wall 9. Specifications 332,003, [Class 15 (i)], 500,013 and 509,981 are referred to.ALSO:Apparatus for the continuous treatment of flocculous textiles by spraying comprises a conveyer consisting of a plurality of oscillating bars in two groups and spraying devices above the conveyer, the treatment taking place in a chamber which is closed except for two liquid seals, one in the front wall and one in the back. The conveyer bars are bent V-shape near the front and back wall for passing through the liquid seals. When using oxygen-sensitive treating liquids inert gases or gases or low oxygen content are preferably introduced into the chamber, and any gases removed with the treating liquid are removed and fed back into the chamber. An example is given in which staple fibres from viscose which have been coagulated but not yet regenerated to cellulose hydrate are passed on a conveyer through a <PICT:0629100/IV (c)/1> <PICT:0629100/IV (c)/2> <PICT:0629100/IV (c)/3> liquid seal into the treatment chamber where they are treated with the regenerating-medium and the hydrogen sulphide which is liberated is sucked off. The fibres are then conveyed out of the chamber through a second liquid seal. Other examples are given in which regenerated staple fibres are treated with hot water to remove residual carbon disulphide, and in which casein fibres are bleached with sodium hydrosulphite. In the apparatus described, the fibres are carried on a series of bars 1, 2, 3, &c., provided with teeth 17 and having oscillatory motion, which move the fibres under the liquid seal formed by the roller 11 and end wall 8, into the treating chamber 10, where they are sprayed with liquids from the baths 32, 33 and 34. The liquid from the baths 33 and 34 are drained to the vessel 40 from which liquid is pumped back to the baths 33 and 34 whilst gases which are carried over by the liquid are separated in vessel 40 and returned to the treating chamber through the pipe 45. The fibres leave the chamber through the liquid seal formed by the roller 12 and end wall 9. Specifications 332,003, [Class 15 (i)], 500,013 and 509,981 are referred to.