Method for treatng wastewater of producing reactive dyes in class of bromamine acid, and for reclaiming resources

Abstract

The processing steps are: water water passes through three kinds of adsorption towers in proper order in temp. 5-50 deg.C and flow quantity 0.5-3 B v / h, each absorption tower is filled by a kind of resin, alkali solution, carbinol and water are used as deadsorption agent to deadsorb and regenerate the resin absorbed organic substances, the deadsorption temp. is 10-60 deg.C, the flow quantity of deadsorption agent is 0.5-3 Bv / h. High density euent generated by deadsorption can be distilled to recover dye and other organic substances, low density eluent can be used to next deadsorption operation. By this invention, waste water producing bromamine acid dye CODcr can be reduced less than 100 mg / L and chromaticness is less than 10 times after being processed by resin.

Description

1. Technical Field

[0001] The invention relates to a method for the treatment and resource recovery of waste water generated in the production process of a type of dye, specifically, to a method for treatment and resource recovery of the waste water discharged in the production process of bromamine active dyes. 2. Background technology

[0002] Bromamine acid reactive dyes are an important dark variety in the dye industry. There are many varieties of reactive brilliant blue K-NR, K-3R, K-BR, X-BR, X-3R, etc., with an annual production capacity of nearly 10,000 Ton. A large amount of process waste water is generated in the production of these dyes, and each ton of product produced approximately produces more than 15 tons of process waste water. The chroma and organic content of the wastewater are both high, reaching 30,000 to 40,000 times and 2,000 to 5,000 mg / L, respectively. The main pollutants in wastewater are finished dyestuffs and their raw materials and intermediates. Most ...