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Dye acidic waste water treatment method and device

A technology of acid wastewater and treatment method, which is applied in water/sewage treatment, adsorption water/sewage treatment, multi-stage water/sewage treatment, etc. It can solve the problems of large amount of oxidant, unsuitable for widespread use, and high treatment cost. The effect of widening the pH range, reducing personnel costs, and reducing energy consumption

Active Publication Date: 2013-06-05
ZHEJIANG DIBANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing method of using oxidizing agents (sodium hypochlorite, hydrogen peroxide, etc.) to treat (CN102826673A) acid dye wastewater to prepare by-products such as sodium sulfate (ammonium) or sodium chloride (ammonium), in order to achieve a relatively satisfactory treatment effect, not only the amount of oxidizing agent is relatively large , the treatment cost is high, and there are strict control requirements for the pH value of the wastewater, so it is not suitable for widespread use

Method used

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  • Dye acidic waste water treatment method and device
  • Dye acidic waste water treatment method and device
  • Dye acidic waste water treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The waste sulfuric acid with a mass percentage of 2% (chroma 256 times, TOC value 1000mg / L) collected by classification is pumped to MVR equipment S1 by pump P1 and concentrated to about 11% sulfuric acid mass percentage. The concentrated waste sulfuric acid is continuously pumped to the neutralization tank B through the metering pump P3, and at the same time, the sodium hydroxide solution is continuously pumped in through the metering pump P4. After the pH value is 8.1 measured by the online pH meter, the neutralization solution passes through the overflow port Continuously flow into the adsorption tank C, and at the same time, the white clay with a mass of 0.3% relative to the influent flow rate is continuously and automatically added by the twisting cage device W for adsorption. The mixed liquid in the pump is filtered by the filter press E, and the filtrate is pumped to the micro electrolytic cell G through the metering pump P6 (wherein the mass ratio of iron is 90%,...

Embodiment 2

[0074] Use the pump P1 to pump the waste hydrochloric acid with a mass percentage of 8% (color 256 times, TOC value 1200mg / L) collected by classification into the MVR equipment S1 to concentrate until the mass percentage of hydrochloric acid is about 11%, and the concentrated waste hydrochloric acid The metering pump P3 is continuously pumped to the neutralization kettle B, and the sodium hydroxide solution is continuously pumped into the metering pump P4 at the same time. After the pH value is 9.2 measured by the online pH meter, the neutralization solution continuously flows into the adsorption kettle C through the overflow port, and at the same time The bentonite whose mass is 1% relative to the influent flow rate is continuously and automatically added by the twisting cage device W for adsorption. The mixed solution after adsorption flows into the transfer kettle D, and the pump P5 pumps the mixed solution in the transfer kettle D to the pressure. The filter E is filtered, ...

Embodiment 3

[0076] The waste hydrochloric acid collected by classification with a mass percentage of 12% (chromaticity 512 times, TOC value 1500mg / L) is continuously pumped to the neutralization tank B through the metering pump P3, and liquid ammonia is continuously pumped into the neutralization tank B through the metering pump P4 at the same time. After the pH value measured by the pH meter is 8.5, the neutralization solution flows into the adsorption kettle C through the overflow port, and at the same time, the clay with a mass of 5% relative to the influent flow rate is continuously and automatically added by the twisting cage device W for adsorption. The mixed solution flows into the transfer kettle D, and at the same time, the mixed solution in the transfer kettle D is pumped to the filter press E for filtration by the pump P5, and the filtrate is pumped to the micro electrolytic cell G (the mass ratio of iron is 70%, and the mass ratio of copper is 70% by the metering pump P6). ratio ...

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Abstract

The invention relates to a dye acidic waste water treatment method and device. The method comprises steps as follows: separately collected dye waste acid is subjected to distilling concentration, neutralization, adsorption, micro-electrolysis, coagulative precipitation, activated carbon column adsorption, concentrating crystallization and separation through an automatic control system to prepare sodium (ammonium) sulfate or sodium (ammonium) chloride; and the distilled water is subjected to advanced treatment to reach the industrial reuse water standard, enters an industrial water storage tank, and is circulated to the dye production procedure. The method and device are especially suitable for industries generating abundant waste sulfuric acid and waste hydrochloric acid, such as production of dyes, titanium white and the like. The abundant waste sulfuric acid and waste hydrochloric acid generated in the production process can be utilized to prepare sodium (ammonium) sulfate or sodium (ammonium) chloride, thereby recycling acidic waste water, and changing wastes into valuable substances; and meanwhile, the distilled water can be circulated into industrial production after advanced treatment, thereby reducing the waste water discharge.

Description

technical field [0001] The invention relates to a treatment method for dye acid wastewater and a device for treating dye acid wastewater using the method. Background technique [0002] With the rapid development of my country's dye industry in recent years, dye has become an important pillar industry in my country. At the same time, due to the continuous innovation of dyeing technology, new synthetic materials are widely used in the whole industry, which leads to the increase of difficulty in the treatment of three wastes. Acid is an important raw material in the dye industry. During the production of various dyes and intermediates, a large amount of waste acid is discharged into the water together with unused organic matter and by-products, which not only increases the difficulty of sewage treatment in enterprises, but also causes a large amount of waste of resources. Especially during the "Twelfth Five-Year Plan" period, with the development of national energy conservati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D5/00C01D3/06C01C1/24C01C1/16C02F1/28C02F1/461
Inventor 徐万福傅伟松余彬张现刚汪玲玲
Owner ZHEJIANG DIBANG CHEM
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