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An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process

The technology of a denitration catalyst and a treatment method is applied in the field of electrochemical treatment of waste water from the regeneration process of flue gas denitration catalyst, which can solve the problems of easy excess of precipitant and flocculant, high treatment cost, and large floor space, and achieves no production The effect of secondary pollution, simple operation and small footprint

Inactive Publication Date: 2016-06-22
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has disadvantages such as easy excess of precipitant and flocculant, large amount of sludge, high treatment cost and large floor area.

Method used

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  • An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process
  • An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process
  • An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process

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Embodiment 1

[0031] An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process, the process is as follows figure 2 As shown, the implementation steps are as follows:

[0032] Wastewater from flue gas denitrification catalyst regeneration process is collected and enters the electrochemical reaction device for electrocoagulation-Fenton oxidation coupling reaction. Iron electrode plates are used in the electrochemical reaction device, and the connection mode of the electrode plates is bipolar connection. The distance between the plates is 1cm. Control the high-voltage and high-frequency pulse power supply 300V pulsed DC voltage, add 15wt.% hydrogen peroxide to the electrochemical reaction device at a rate of 1.5L / h through the automatic dosing device, control the pH in the electrochemical reaction device=4, and the water temperature is 35°C , react for 2 minutes, after the reaction is finished, it will settle still. The supernatant of the...

Embodiment 2

[0038] An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process, the implementation steps are as follows:

[0039] Wastewater from flue gas denitrification catalyst regeneration process is collected and enters the electrochemical reaction device for electrocoagulation-Fenton oxidation coupling reaction. Iron electrode plates are used in the electrochemical reaction device, and the connection mode of the electrode plates is bipolar connection. The distance between the plates is 1cm. Control the high-voltage and high-frequency pulse power supply 500V pulsed DC voltage, add 15wt.% hydrogen peroxide to the electrochemical reaction device at a rate of 2L / h through the automatic dosing device, control the pH in the electrochemical reaction device=6, and the water temperature is 5°C. React for 50 minutes, and after the reaction is over, it will settle still. The supernatant of the electrochemical reaction device is the treated wa...

Embodiment 3

[0045] An electrochemical treatment method for wastewater from a flue gas denitrification catalyst regeneration process, the implementation steps are as follows:

[0046] The waste water from the flue gas denitrification catalyst regeneration process is collected and enters the electrochemical reaction device for electrocoagulation-Fenton oxidation coupling reaction. The electrochemical reaction device uses iron electrode plates, and the connection mode of the electrode plates is bipolar connection, and the distance between the plates is 1.5cm , control the high-voltage high-frequency pulse power supply 300V pulsed DC voltage, add 5wt.% hydrogen peroxide to the electrochemical reaction device at a rate of 1.0L / h through the automatic dosing device, control the pH in the electrochemical reaction device=7, and the water temperature is 25 ℃, react for 7 minutes, after the reaction, it will settle still, and the supernatant of the electrochemical reaction device is the treated wast...

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Abstract

The invention discloses an electrochemical treatment method of waste water of a flue gas denitration catalyst regeneration technology. The electrochemical treatment method comprises the following steps of feeding waste water of a flue gas denitration catalyst regeneration technology into an electrochemical reaction device utilizing an iron electrode, adding hydrogen peroxide into the electrochemical reaction device so that the waste water of the flue gas denitration catalyst regeneration technology undergoes an electrocoagulation-Fenton oxidative coupling reaction, after the reaction is finished, carrying out deposition, discharging the deposited sludge and collecting the supernatant as the treated waste water of the flue gas denitration catalyst regeneration technology. The electrochemical treatment method utilizes waste water TiO2 electrocatalytic oxidation-Fenton coupling effects and greatly improves organic pollutant mineralization efficiency. The electrochemical treatment method utilizes high-automation degree equipment, has a low sludge production amount and a small land occupation area, and produces stable treatment effects. Water treated by the electrochemical treatment method has quality according with requirements in the sewage comprehensive discharge standard and vanadium industrial pollutant discharge standard and can be recycled or directly discharged.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to an electrochemical treatment method for wastewater in a flue gas denitrification catalyst regeneration process. Background technique [0002] The Selective Catalytic Reduction (SCR) process is the most widely used, mature and effective flue gas denitrification technology in the world, and the denitrification catalyst is the core of the SCR technology. The service life (that is, deactivation) of denitration catalysts is generally three years. The state encourages the regeneration of deactivated denitration catalysts, which can improve or restore the activity of deactivated catalysts so that they can be recycled. In addition to titanium dioxide, vanadium pentoxide, and tungsten trioxide, deactivated flue gas denitrification catalysts also contain heavy metals such as chromium, beryllium, arsenic, and mercury. Improper regeneration and disposal of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/463C02F1/467
CPCC02F1/463C02F1/4672C02F2305/026
Inventor 夏启斌张琛刘建华吴凡史伟伟
Owner SOUTH CHINA UNIV OF TECH