Method and device for treating nitrate-containing waste liquid

A technology of treatment device and treatment method, applied in water/sewage treatment, chemical instruments and methods, water/sewage treatment equipment, etc., can solve the problem of low chemical reaction efficiency, limited reaction area, and inability to be used for industrial nitrate waste liquid treatment and other problems, to achieve the effect of wide application scope, obvious environmental improvement, reduction of labor intensity and occupational diseases

Pending Publication Date: 2021-10-22
叶涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the chemical reaction between metal copper and nitric acid is mediated by nitrous acid, and the copper ions are re-reduced to metal copper by electrochemistry, so as to realize the removal of nitric acid; but the chemical reaction between metal copper and nitric acid in this method, and The electrochemical reactions in which copper ions are reduced to metallic copper interfere with each other and need to be carried out alternately, and the chemical reaction between metallic copper and nitric acid has low efficiency and limited reaction area, and cannot be used for the treatment of industrial nitrate waste liquid

Method used

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  • Method and device for treating nitrate-containing waste liquid
  • Method and device for treating nitrate-containing waste liquid
  • Method and device for treating nitrate-containing waste liquid

Examples

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Effect test

Embodiment 1

[0067] like figure 1 As shown, the nitrate-containing waste liquid treatment device of embodiment 1 includes an electrolytic separator 3, an electrolytic reaction tank separated by an electrolytic separator 3 into an anode zone 1 and a cathode zone 2, an electrolytic anode 4, an electrolytic cathode 5, and an electrolytic power supply 6. The first nitrogen oxide gas treatment device 7 . The electrolysis separator 3 is a bipolar membrane; the electrolysis power supply 6 is a pulsed electrolysis power supply; the first nitrogen oxide gas treatment device 7 is a nitrogen oxide high-temperature reduction treatment device. The electrolysis anode 4 is located in the anode area 1 and is connected to the positive pole of the electrolysis power supply 6 , and the electrolysis cathode 5 is located in the cathode area 2 and is connected to the negative pole of the electrolysis power supply 6 . The top of the cathode area 2 is provided with a first cover plate 9 , and the first cover pla...

Embodiment 2

[0075] like figure 2 As shown, the nitrate-containing waste liquid treatment device of embodiment 2 includes an electrolytic separator 3, an electrolytic reaction tank separated by an electrolytic separator 3 into an anode zone 1 and a cathode zone 2, an electrolytic anode 4, an electrolytic cathode 5, and an electrolytic power supply 6. The first nitrogen oxide gas treatment device 7, the catholyte preparation tank 24, the first transfer tank 25, the second transfer tank 26, the first replenisher storage tank 27, the water-oil separator 22, the first solid-liquid separation Device 23. The electrolysis separator 3 is a cationic membrane; the electrolysis power supply 6 is a pulsed electrolysis power supply; the first nitrogen oxide gas treatment device 7 is a nitrogen oxide high-temperature reduction treatment device. The electrolysis anode 4 is located in the anode area 1 and is connected to the positive pole of the electrolysis power supply 6 , and the electrolysis cathode...

Embodiment 3

[0086] like image 3 As shown, the nitrate-containing waste liquid treatment device of embodiment 3 includes an electrolytic separator 3, an electrolytic reaction tank separated by an electrolytic separator 3 into an anode zone 1 and a cathode zone 2, an electrolytic anode 4, an electrolytic cathode 5, and an electrolytic power supply 6. The first nitrogen oxide gas treatment device 7 , the tail gas treatment device 21 , and the waste liquid pretreatment tank 33 . The electrolytic separator 3 is a cation exchange membrane; the first nitrogen oxide gas processing device 7 is a normal temperature chemical reaction processing device for nitrogen oxide gas. The electrolysis anode 4 is located in the anode area 1 and is connected to the positive pole of the electrolysis power supply 6 , and the electrolysis cathode 5 is located in the cathode area 2 and is connected to the negative pole of the electrolysis power supply 6 . A first cover plate 9 is provided on the top of the cathod...

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Abstract

The invention discloses a method for treating nitrate-containing waste liquid. The method comprises the following steps of: using an electrolytic reaction tank, and arranging an electrolytic separator in the electrolytic reaction tank to form an anode region and a cathode region, wherein the anode region and the cathode region are filled with an anode electrolyte and a cathode electrolyte respectively; the electrolysis separator can effectively reduce or even prevent anions in the cathode electrolyte from migrating to the anode region under the action force of an electric field; and the cathode electrolyte is an acidic solution containing iron ions and nitrate-containing waste liquid. According to the method, iron ions are continuously converted into ferrous ions through electric synergy, so that nitrate radicals are effectively decomposed, and the effect of remarkably reducing or removing the nitrate radicals is achieved; and the treatment method of the nitrate-containing waste liquid is wide in application range and can be used for treating all nitrate-containing industrial waste liquid.

Description

technical field [0001] The invention relates to a treatment method for industrial waste liquid, in particular to a treatment method for waste liquid containing nitrate radicals and a device thereof. Background technique [0002] Nitrogen-containing wastewater is a common type of wastewater in domestic and industrial production. It usually contains nitrate ions that are harmful to humans. Discharging into water bodies will seriously affect the ecology of water bodies and cause environmental pollution. After nitrate ions enter the human body, they will be reduced to carcinogenic nitrite ions, and after nitrate ions are inhaled into the blood by infants and young children, they will react with hemoglobin to form methemoglobin, which will irreversibly bind to oxygen, resulting in methemoglobin disease. [0003] Nitrogen-containing waste liquid produced in industrial production usually comes from nitric acid used in production or mixed raw materials containing nitrate components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/16
CPCC02F1/461C02F1/46104C02F2101/163C02F2201/46105C02F2201/4612
Inventor 叶涛叶旖婷
Owner 叶涛
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