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

Abstract

The invention discloses a treatment and resource recovery method for waste water from the production of bromoacidic reactive dyes. The process is as follows: the waste water passes through three kinds of adsorption towers sequentially under the conditions of 5-50°C and a flow rate of 0.5-3BV / h. Each of the adsorption towers is filled with a resin; alkaline solution, methanol and water are used as desorbents to desorb and regenerate the resin that has absorbed organic matter. The desorption temperature is 10-60°C, and the flow rate of the desorbent is 0.5-3BV / h; The high-concentration eluent from the desorption can recover dyes and other organic substances through distillation, and the solvent can be recovered, and the low-concentration eluent can be used for the next batch of desorption operations. Using this method, the waste water from the production of bromic acid reactive dyes can be treated with resin to COD cr Reduced to below 100mg / L, the chromaticity is less than 10 times, and the discharge can reach the standard, and most of the resources in the wastewater can be recycled, which has significant environmental, economic and social benefits.

Description

1. Technical field

[0001] The invention relates to a treatment and resource recovery method for waste water produced in a dye production process, in particular to a treatment and resource recovery method for waste water discharged in the production process of bromic acid reactive dyes. 2. Background technology

[0002] Bromine reactive dye is an important dark-colored variety in the dye industry. There are many varieties of reactive brilliant blue K-NR, K-3R, K-BR, X-BR, X-3R in China, with an annual production capacity of nearly 10,000 Ton. The production of these dyes produces a large amount of process wastewater, and more than 15 tons of process wastewater is generated for every 1 ton of product produced. The chroma and organic content of the wastewater are high, reaching 30,000-40,000 times and 2,000-5,000 mg / L, respectively. The main pollutants in wastewater are finished dyes and their raw materials and intermediates. Most of the existing domestic manufacturers have ...