METHOD OF REGENERATION OF TECHNOLOGICAL SOLUTIONS IN VISCOSE FIBER PRODUCTION Russian patent published in 1995 - IPC

FIELD: chemical industry. SUBSTANCE: spent technological solution is degassed under vacuum, heated in shell-and-tube heater with the secondary steam and heating steam and subjected for step evaporation. Preheater condensate is throttled twice and formed secondary steam is recovered to the process as heating one. The secondary steam of degasifier is condensed with water and/or removed from the unit, or neutralized, dried and compressed as heating steam in heaters. At unit output 21000 kg/hr the specific consumption of heating steam at the first case is 260, and at the second case - 3.2 kg/1000 kg evaporated water, energy of all kinds is 660 and 166 mJ/1000 kg water and coolant water 350 and 13 m³/h. EFFECT: improved method of regeneration. 2 cl, 1 dwg, 1 tbl