Spinning printing and dyeing waste water reclamation method, device and application thereof

Abstract

The invention discloses a spinning printing and dyeing waste water reclamation method, a device and the application thereof. The method comprises the steps of: filtering spinning printing and dyeing waste water; sequentially carrying out homogenizing, equalizing quantity and primary sedimentation on filtrate; adding sodium chloride into waste water supernate, and evenly mixing for indirect electro-catalysis oxidation; sequentially evenly mixing the waste water treated by indirect electro-catalysis oxidation with basic aluminium chloride and polyacrylamide; removing the precipitated supernate, and sequentially treating by activated carbon adsorption and reverse osmosis; removing trace organic chloride generated in the electrolytic process and the rest COD and color; and obtaining recyclable water resource. The device for realizing the method comprises a grate, a regulating reservoir, a sealed electrolytic cell, a flocculation tank, an inclined tube sedimentation tank, a sand filter tank, an active carbon filter, an intermediate water tank, a reverse osmosis unit, a clear water reservoir, a brine tank, a chlorine absorbing tank, a sludge concentration tank and a plate-and-frame filter press. The invention can effectively treat spinning printing and dyeing waste water, and has the advantages of high treatment efficiency, stable effluent quality, simple technological process and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for recycling textile printing and dyeing wastewater as well as its device and application. Background technique [0002] Wastewater reuse is not only the main way of environmental protection and water pollution prevention and control, but also the most effective way to solve the shortage of water resources to achieve "clean production", "source reduction" and "waste reduction" and other strategic measures of environmental protection. It is listed as one of the key themes of the "National Medium and Long-Term Science and Technology Development Plan (2006-2020)". At present, water resources are increasingly scarce, consumption is increasing, and they are polluted to varying degrees, making wastewater reuse a potential water resource. [0003] The textile printing and dyeing industry consumes a lot of water resources, accounting for about 35% of the total industr...

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Problems solved by technology

[0005] However, the biological method has the disadvantages of long processing time, limited processing capacity, large building area, and high civil engineering costs.

The growth and degradation activity of microorganisms are greatly affected by factors such as temperature and water quality conditions, and it is difficult to adapt to the characteristics of rapid changes in water quality, which makes the water quality of biological treatment effluent fluctuate greatly, and the color of effluent water is darker, which cannot reach the chromaticity of washing water in the rinsing process. The strict standard of greater than 10 degrees cannot be directly reused

In order to improve the dye fixing rate, the electrolyte added in the pulping process introduces excess salt into the printing and dyeing wastewater. After recycling, the salt content in the reused water will increase, corrode the equipment, and pose a threat to safe production.

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