Printing And Dyeing Wastewater Treatment

Solution：

Printing and dyeing wastewater directly into IVECDEST cryogenic vacuum evaporator without pretreatment, under the condition of vacuum low temperature evaporation, water vapor condensation in the process of vacuum forming distilled water, collect to water storage tanks, only about 8% of the remaining traces of concentrate. It can greatly reduce and remove the organic matter COD and heavy metals in the waste liquid. Through the IVECDEST evaporator, the amount of wastewater can be reduced by more than 92%, and the distilling liquid can be reused as middle water or further treated to meet the discharge standards.

Application：

Screen printing

Ink printing

Toner processing

Photographic industry wastewater

Brief Introduction

Wastewater source:

The sources of dye wastewater are the four processes of dye processing to discharge wastewater, Preprocessing stage (including the singeing, desizing, scouring, bleaching and mercerizing process) to discharge desizing wastewater and sewage sludge scouring and bleaching and mercerizing wastewater, dyeing wastewater from dyeing process, the discharge printing process printing wastewater and soap wastewater, dye wastewater is a mixture of the above all kinds of waste water waste water, or other than the bleaching wastewater comprehensive wastewater.

Wastewater characteristics：

1. There are many kinds of wastewater: colored wastewater containing salt organic matter, inorganic salt concentration is 15%-25%, mainly sodium chloride, a small amount of sodium sulfate, potassium oxide and other metal salts.

2. Wastewater organic matter composition is complex and high concentration: dyes, pigments and other high concentration organic wastewater, COD up to hundreds of thousands of.

3. Large amount of wastewater, high color, high toxicity: dyes, pigments, etc. using water as the solvent, water consumption, and separation, refining, washing, filtration and other processes to eliminate a large amount of wastewater. In addition, various active agents and additives are added in the process of fine chemical production, so the dye wastewater often contains oils that exceed the national discharge standards.

4. wastewater discharge intermittent, variable: fine chemical wastewater with intermittent discharge, water changes over time is bigger, to the wastewater treatment engineering design, operation and management to increase a lot of difficulties. Dye production wastewater treatment should be based on the characteristics of wastewater and emissions requirements for it, choose the appropriate treatment.

Environmental impact:

Dye wastewater, at present China's dye production has occupied 60%-70% of the global total production, according to incomplete statistics, our country every year about 160 million M3 of dye wastewater discharged into various water environment.

In our zero waste production application center, embellish for many years in the coming year to continuously develop the innovative technology can significantly improve the quality of distilled water. For example, with the aid of European technology IVECDEST cryogenic vacuum evaporation technology, by an ingenious system can meet the quality requirements, to get the clear distilled water. This makes our IVECDEST cryogenic vacuum distillation system unique in the global market.

Process Diagram：

Printing and dyeing wastewater without pretreatment directly into the IVECDEST low-temperature vacuum evaporator, in the vacuum low-temperature conditions of evaporation, water vapor in the process of vacuum condensation to form distilled water, collected to the water storage tank, only about 8% of the trace concentrated solution. It can greatly reduce and remove the organic matter COD and heavy metals in the waste liquid. Through the IVECDEST evaporator, the amount of wastewater can be reduced by more than 92%, and the distilling liquid can be reused as middle water or further treated to meet the discharge standards.