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A method for treating coking nanofiltration concentrated brine

A concentrated brine and nanofiltration technology, applied in chemical instruments and methods, water/sewage treatment, natural water treatment, etc., can solve the problems of high treatment cost, low wastewater degradation rate, and high energy consumption, and achieve easy operation, no second The effect of secondary pollution

Active Publication Date: 2016-06-29
云南天朗环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improving the recovery rate and direct or indirect discharge does not remove the pollutants fundamentally, and the comprehensive utilization has great limitations, while the energy consumption of evaporation and concentration is too high, and most enterprises cannot afford it.
The degradation rate of iron-carbon micro-electrolysis treatment of wastewater alone is not ideal, and the effect is not ideal; Fenton in the advanced oxidation method has the advantages of simple operation, no need for complicated equipment, and environmental friendliness, but the Fenton method alone has the disadvantage of high treatment cost

Method used

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  • A method for treating coking nanofiltration concentrated brine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Soak the scrap iron chips in the solution of washing powder dissolved in water according to the routine and the hydrochloric acid solution with a volume concentration of 5% for 30 minutes respectively to remove the oil and oxides on the surface of the scrap iron chips, and then wash with water until neutral , dried for later use;

[0026] b. Adjust the pH value of the coking nanofiltration concentrated brine to 3.2 with sulfuric acid with a concentration of 0.1mol / L;

[0027] C, press waste iron filings: the mass ratio of carbonaceous matter=1:1, the scrap iron filings after the step a process is mixed with granular activated carbon, then press the amount of 1L coking nanofiltration concentrated brine to need scrap iron filings 30g, to Add the mixture of waste iron scraps and carbonaceous matter to the coking nanofiltration concentrated brine obtained in step b, and then press 1L of coking nanofiltration concentrated brine to obtain H 2 o 2 1mL, add 30% H 2 o 2 S...

Embodiment 2

[0032] a. Soak the carbon steel scrap iron scraps with the solution of decontamination powder and calcium oxide dissolved in water according to the routine and the sulfuric acid solution with a volume concentration of 8% respectively for 50 minutes to remove the oil and oxidation on the scrap iron scrap surface and then washed with water until neutral, dried for later use;

[0033] b. The coking nanofiltration concentrated brine is adjusted to pH = 2 with sulfuric acid with a concentration of 2 mol / L;

[0034] C, press waste iron filings: the mass ratio of carbonaceous matter=5:1, the scrap iron filings after step a process is mixed with powdery activated carbon, then press the amount of 1L coking nanofiltration concentrated brine to need scrap iron filings 60g, to Add the mixture of waste iron scraps and carbonaceous matter to the coking nanofiltration concentrated brine obtained in step b, and then press 1L of coking nanofiltration concentrated brine to obtain H 2 o 2 5mL ...

Embodiment 3

[0039] a. Soak the aqueous solutions of sodium hydroxide and sodium bicarbonate with a mass concentration of 5% and sulfuric acid and hydrochloric acid solutions with a volume concentration of 10% respectively for 60 minutes to remove oil and oxides on the surface of scrap iron chips, and then use Wash with water until neutral, dry for later use;

[0040] b. The coking nanofiltration concentrated brine is adjusted to pH = 4 with sulfuric acid with a concentration of 10 mol / L;

[0041] c. According to the mass ratio of scrap iron scraps: carbonaceous matter = 3:1, mix the scrap iron scraps treated in step a with granular activated carbon and CDQ coke powder, and then use 1L coking nanofiltration concentrated brine to need scrap iron The amount of chips 1g, in the coking nanofiltration concentrated brine obtained in step b, add the mixture of scrap iron scraps and carbonaceous matter, then press 1L coking nanofiltration concentrated brine to need H 2 o 2 10mL volume, add the m...

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Abstract

The invention discloses a method for treating coking nanofiltration concentrated brine, belonging to the technical field of sewage treatment. The method comprises the following steps: pretreating scrap iron chips for later use, regulating the pH value of the coking concentrated brine, proportionally adding the iron chips and carbonous substance into the coking concentrated brine, adding a small amount of H2O2, continuously stirring, taking the supernate, regulating the pH value, adding the iron chips, continuing stirring, regulating the pH value of the obtained supernate, adding a flocculant to precipitate, removing solids, and carrying out sand filtration on the supernate to obtain the effluent water. After the coking nanofiltration concentrated brine is treated by the method, the pH value of the effluent water can reach 6.0-9.0, and the COD (chemical oxygen demand) is less than or equal to 100 mg / L. The method is easy to operate, and does not have secondary pollution.

Description

technical field [0001] The invention relates to a method for treating coking nanofiltration concentrated brine, belonging to the technical field of sewage treatment. Background technique [0002] Coking nanofiltration concentrated brine refers to the concentrated brine after coking wastewater has been treated by biochemical + microwave + reverse osmosis + nanofiltration membrane. Due to the complex pollutants contained in coking wastewater itself, the concentrated brine salt and organic impurities after biochemical + microwave + reverse osmosis + nanofiltration membrane treatment are highly concentrated and the pollutants are difficult to degrade. If it fails to meet the discharge standard without proper treatment, even if it is discharged, it will inevitably have adverse effects on soil, surface water, and the surrounding environment. Therefore, it is a worldwide problem that coking concentrated brine is difficult to handle and difficult to realize comprehensive utilizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
CPCC02F1/46176C02F1/66C02F1/722C02F9/00C02F2103/365C02F2305/026
Inventor 曹阳张燕玲杨崇德杨玲刘缘缘
Owner 云南天朗环境科技有限公司