Ashok Brothers

Ashok Brothers is a full-service company offering engineering, systems, and solutions for the textile, chemical and liquid processing. Established in 1939, the company is known for innovative processing equipment for drying, evaporation, filtration, and liquid processing. A Caustic Recovery Plant is typically a multiple effect evaporation plant whi... ch will re-concentrate the weak lye by heating it in heat exchanger and when it reaches evaporator, vapour is released due to water evaporation that increases its concentration. This process is repeats itself by circulation in caustic recovery plant till the desired concentration is reached. Textile Mills involved in mercerizing of (Yarn, Woven, Knitted, Denim) cotton use caustic (NaOH) in mercerizing machines. After process in mercerizing machine this dilute caustic soda solutions come out from mercerizing machines as drain. The density of drain dilute caustic solution varies from 3% to 8% (31 to 87 gm/lt). The drained weak lye also causes financial loss not only by removal but also by process incurred to remove it, i.e. expense incurred in treating (neutralizing) at ETP as per pollution laws. The system re-concentrates weak caustic lye from 40 to 50 gm/ltr to 250 to 450 gm/ltr as required by the process viz. dry-in-wet or wet-in-wet mercerizing. Fresh caustic in the process is required only for concentration variation and make-up. Payback period of the Plant is less than 4 months for a Triple Effect Caustic Recovery plant with Surface Condenser and Thermo-compressor. The energy of heating steam can be completely transformed into hot water. Hot Water is generated at: The uncontaminated steam condensate from the first heat exchanger may be reused as boiler feed water. At surface condenser hot water is generated by soft water feed to the surface condenser for cooling vapour of the last effect. The result is eventually soft water of a high temperature, which saves cost in water softening before use in mercerizing machines or in initial washing. Alkaline condensate is ...Read More