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Device and method for degrading printing and dyeing wastewater by nanosecond high-voltage pulse discharge plasma in cooperation with titanium dioxide

A high-voltage pulse power supply and plasma technology, applied in chemical instruments and methods, textile industry wastewater treatment, special compound water treatment, etc., can solve the problems of short survival time, low treatment effect, and high energy consumption

Inactive Publication Date: 2016-08-17
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively short survival time of the active substance OH (generally at the level of nanoseconds), it has been transformed into other substances before it comes into contact with the wastewater macromolecules, resulting in a relatively low treatment effect.
[0003]In addition, the vast majority of existing products of this type are complicated in equipment, consume a lot of energy, require professional operation, and have low degradation rate of wastewater treatment, which limits pulse discharge Promotion of plasma water treatment products
There are very few professional equipments for treating printing and dyeing wastewater in the market, lack of circulation system, air blowing system and coating means, or no one has combined these treatment methods and applied them to the treatment of printing and dyeing wastewater

Method used

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  • Device and method for degrading printing and dyeing wastewater by nanosecond high-voltage pulse discharge plasma in cooperation with titanium dioxide
  • Device and method for degrading printing and dyeing wastewater by nanosecond high-voltage pulse discharge plasma in cooperation with titanium dioxide
  • Device and method for degrading printing and dyeing wastewater by nanosecond high-voltage pulse discharge plasma in cooperation with titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, the water outlet of the reactor is connected to the input end of the peristaltic pump through a hose, and the water inlet is connected to the output end of the peristaltic pump through a hose.

[0032] Utilize the sol-gel method to plate a titanium dioxide film with a length of 10 mm at the bottom of the nozzle, and the coating steps are as follows:

[0033] 1. Drop 10ml of n-tetrabutyl titanate into 30ml of absolute ethanol under vigorous stirring, and stir for 10 minutes to obtain a uniform light yellow transparent first solution.

[0034] 2. Add 15 drops of nitric acid to a solution made of 5 ml of double distilled water and 10 ml of absolute ethanol under vigorous stirring to obtain a second solution with pH=3.

[0035] 3. Under vigorous stirring, drop the first solution into the second solution at a rate of 1 drop / second to obtain a uniform and transparent sol, and continue stirring to obtain a translucent wet sol.

[0036] 4. Plating a film with ...

Embodiment 2

[0039] Connect the water outlet of the reactor to a beaker or other containers through a hose, and connect the water inlet to a container containing a large amount of printing and dyeing wastewater through a hose. The coating method, discharge conditions, etc. are exactly the same as those in Example 1. This method can continuously process printing and dyeing wastewater in batches, and does not require other operations by staff during the treatment process, which can save a lot of labor costs.

Embodiment 3

[0040] Embodiment 3: In this example, the water outlet of the reactor is connected to the input end of the peristaltic pump through a hose, and the water inlet is connected to the output end of the peristaltic pump through a hose.

[0041] A titanium dioxide film with a length of 10mm is plated on the bottom of the nozzle by the sol-gel method, and another medicine proportioning method is adopted. The coating steps are as follows:

[0042] 1. Drop 10ml of n-tetrabutyl titanate into 30ml of absolute ethanol under vigorous stirring, and stir for 10 minutes to obtain a uniform light yellow transparent first solution.

[0043] 2. Add 20 drops of nitric acid to a solution made of 10 ml of double distilled water and 20 ml of absolute ethanol under vigorous stirring to obtain a second solution with pH=3.

[0044] 3. Under vigorous stirring, drop the first solution into the second solution at a rate of 1 drop / second to obtain a uniform and transparent sol, and continue stirring to ob...

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Abstract

The invention discloses a device and a method for degrading printing and dyeing wastewater by virtue of synergy of nanosecond high-voltage pulse discharge plasma and titanium dioxide. Anhydrous ethanol, tetrabutyl titanate, redistilled water, nitric acid and diluted hydrochloric acid are prepared into a sol, a discharge nozzle electrode is uniformly dip-coated with the sol so as to form a titanium dioxide film, the titanium dioxide film is sintered in a muffle furnace and the excitation of a titanium dioxide photocatalyst is achieved by virtue of ultraviolet luminescence generated during pulse discharge. By adding the titanium dioxide photocatalyst, the number of OH free radicals for degrading a dye can be increased and therefore, the treating efficiency of the dye wastewater is increased; compared with the manner that titanium dioxide is directly put into the wastewater, the manner that the discharge electrode is coated with titanium dioxide can reduce the step of recovering titanium dioxide from the wastewater; and titanium dioxide is excited by virtue of ultraviolet luminescence generated during nanosecond pulse discharge such that an excitation light source for titanium dioxide does not need to be additionally added. In addition, the device has a circulation function and by the device, the circulation treatment of the dye wastewater can be achieved.

Description

[technical field] [0001] The invention relates to a printing and dyeing wastewater treatment device and method, in particular to a nanosecond high-voltage pulse discharge plasma cooperative titanium dioxide degradation printing and dyeing wastewater device and method. [Background technique] [0002] Most of the existing methods and technologies for treating wastewater using pulsed discharge plasmas pass active substances such as OH and O produced in the gas into the wastewater, and the active substances decompose or oxidize macromolecular substances. However, due to the relatively short survival time of the active substance OH (generally at the level of nanoseconds), it has been converted into other substances before contacting the wastewater macromolecules, resulting in a relatively low treatment effect. [0003] In addition, the vast majority of existing products of this type have complex equipment, high energy consumption, professional operation, and low degradation rate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/32
CPCC02F1/305C02F1/32C02F1/325C02F2103/30C02F2305/10
Inventor 孙明金宏力代存峰杨颜颜
Owner SHANGHAI MARITIME UNIVERSITY