A method for synergistic treatment of coloring flaw detection wastewater and pickling wastewater

A coloring flaw detection and collaborative processing technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high operating cost, complicated recycling process, and large energy consumption. Achieve the effects of reducing construction and operation costs, simple operation and management, and reducing waste treatment costs

Active Publication Date: 2016-08-24
北京中科国益环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pickling wastewater contains many types of metal elements, and the concentration changes greatly, the recovery process is complicated and the cost is high
The wastewater is generally discharged after adjusting the pH to neutral, but this method is less effective in removing heavy metals
[0004] The treatment of industrial wastewater is mainly treated separately, and the respective methods are selected according to the characteristics of various wastewater; or multiple wastewaters are mixed, and superimposed by certain processes in general, without considering the characteristics of each wastewater, the treatment process is long and energy-intensive High consumption and high operating costs

Method used

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  • A method for synergistic treatment of coloring flaw detection wastewater and pickling wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The dyed flaw detection wastewater is subjected to ozone oxidation treatment in the ozone reaction tower, and the ozone aeration time is 3h, 1m 3 The dosage of wastewater ozone is about 600g to obtain the first solution;

[0022] (2) Add the first solution of the above step (1) into the pickling wastewater and mix, the volume ratio of the pickling wastewater and the first solution is 1:1, mix evenly with a mixer to obtain the second solution, and then add 20% NaOH solution, adjust the pH value to 9 to obtain the third solution;

[0023] (3) The third solution of the above step (2) is first subjected to solid-liquid separation through a plate and frame filter press, and then filtered through a quartz sand filter to obtain the fourth solution;

[0024] (4) the fourth solution of above-mentioned steps (3) is adsorbed through activated carbon adsorption tower, and the residence time 30min obtains the fifth solution, selects 10-24 mesh particle size, iodine value is gre...

Embodiment 2

[0027] (1) The dyed flaw detection wastewater is subjected to ozone oxidation treatment in the ozone reaction tower, and the ozone aeration time is 2.5h, 1m 3 The dosage of wastewater ozone is about 500g to obtain the first solution;

[0028] (2) Add the first solution of the above step (1) into the pickling waste water and mix it. The volume ratio of the pickling waste water and the first solution is 1:1.5. Mix evenly with a mixer to obtain the second solution, and then add 15% NaOH solution, adjust the pH value to 10 to obtain the third solution;

[0029] (3) The third solution of the above step (2) is first subjected to solid-liquid separation through a plate and frame filter press, and then filtered through a quartz sand filter to obtain the fourth solution;

[0030] (4) the 4th solution of above-mentioned steps (3) is adsorbed through activated carbon adsorption tower, and residence time 40min obtains the 5th solution, selects 10-24 mesh particle diameter, the coconut sh...

Embodiment 3

[0033] (1) The dyed flaw detection wastewater is subjected to ozone oxidation treatment in the ozone reaction tower, and the ozone aeration time is 2.7h, 1m 3 The dosage of wastewater ozone is about 540g to obtain the first solution;

[0034] (2) Add the first solution of the above step (1) into the pickling waste water and mix, the volume ratio of the pickling waste water and the first solution is 1:2, mix evenly with a mixer to obtain the second solution, and then add 10% NaOH solution, adjust the pH value to 9.5 to obtain the third solution;

[0035] (3) The third solution of the above step (2) is first subjected to solid-liquid separation through a plate and frame filter press, and then filtered through a quartz sand filter to obtain the fourth solution;

[0036] (4) the 4th solution of above-mentioned steps (3) is adsorbed through activated carbon adsorption tower, and residence time 45min obtains the 5th solution, selects 10-24 mesh particle diameter, the coconut shell ...

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Abstract

The invention relates to a coprocessing method for wastewater of flaw detection by colouring and acid washing wastewater, and belongs to the technical field of environment protection engineering. The method includes: subjecting the wastewater of flaw detection by colouring to ozone oxidation to obtain a first solution, adding the acid washing wastewater to obtain a second solution, adding a NaOH solution to adjust the pH value to obtain a third solution, performing solid-liquid separation to obtain a fourth solution, adsorbing by activated carbon to obtain a fifth solution, adding hydrochloric acid to adjust the pH value to be 7, and discharging. The method fully utilizes characteristics of the wastewater of flaw detection by colouring and the acid washing wastewater which are produced in detection and maintenance processes of metal workpieces, treats waste by using waste, reduces processing devices, reduces the cost for construction and operation, and is simple in operation and management.

Description

technical field [0001] The invention relates to a method for synergistic treatment of colored flaw detection wastewater and pickling wastewater, and belongs to the technical field of environmental protection engineering. Background technique [0002] When there are defects or cracks in the metal workpiece, it will affect the service life, and there are also certain safety hazards, so non-destructive testing is required. Colored penetrant testing is a simple and effective detection method. The basic process is: apply red penetrant on the surface to be inspected. If there is a defect, the penetrant penetrates into the defect under capillary action, and then remove the excess penetrant on the surface to be inspected. Agent, and then coated with a layer of developer, the penetrant in the defect will be sucked out to form a magnified defect image, and the defect image will be observed under white light. The waste liquid produced in this process is red due to the penetrant and im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 李非邓志强王宝臣关潇潇刘峰曹伟朱勇军
Owner 北京中科国益环保工程有限公司
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