Energy-saving treatment process for textile printing and dyeing wastewater

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to an energy-saving treatment process for textile printing and dyeing wastewater. A settlement tank usedin the process comprises a tank body, wherein a water inlet pipe is arranged on one side of the tank body and is communicated with the tank body through a connecting pipe; one end, close to the tank body, of the connecting pipe is in flat gradual transition, so that the distribution uniformity of wastewater after being introduced into the tank body is improved; the water inlet pipe is communicatedwith a branch pipe, and the branch pipe is communicated with a flocculating agent through a valve; the tank body is provided with a group of continuously arranged wavy grooves, and sediments of different particles are classified through the wavy grooves, so that the treatment efficiency of the sediments is further improved. According to the invention, a flocculating agent is introduced into the wastewater through the branch pipe communicated with the water inlet pipe, so that the flocculating agent is matched with one end, close to the tank body, of the connecting pipe to form flat gradual transition; therefore, the wastewater in the water inlet pipe and the flocculating agent uniformly form a stratospheric layer, the dispersion uniformity of the wastewater in the tank body is improved, and the sedimentation efficiency of the flocculating agent is further improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to an energy-saving treatment process for textile printing and dyeing wastewater. Background technique [0002] Slope printing and dyeing wastewater refers to the wastewater discharged from the pretreatment, dyeing, printing and finishing of cotton, wool, hemp, silk chemical fiber or blended products. It has high concentration of organic pollutants, poor biodegradability and high chroma. , Contains toxic and harmful ingredients, large changes in water quality, and complex ingredients. In the existing printing and dyeing wastewater treatment methods, sewage treatment agents are generally used. The existing sewage treatment agents mainly include chemical and biological. However, when dealing with printing and dyeing wastewater, there are two existing processes The problem of unreasonable selection, matching and addition methods of various sewage treatment agents will eve...

AI Technical Summary

Problems solved by technology

However, in the prior art, the flocculant is sprayed into the pool body after the waste water is passed into the pool body, so that the flocculant reacts with the impurities in the waste water to produce flocculent suspended matter, and then settles to the bottom of the pool body after standing still, thereby completing the waste water purification. Secondary sedimentation, but the mixing efficiency of flocculant and wastewater is low. When there is a lot of sediment in the pool, it is necessary to stop the use of the pool and drain the wastewater in the pool to clean up the sediment. The cleaning efficiency is low, and the sediment needs to be cleaned. The separation equipment is reused after separation, and the separation efficiency is low, which seriously affects the efficiency of continuous sedimentation of wastewater

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