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Device for removing nitrate nitrogen in water and application method of device

A nitrate nitrogen and water removal technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of poor selectivity of reaction products, low current efficiency of electrochemical denitrification, etc. The effect of maintaining weak acidity and improving current efficiency

Inactive Publication Date: 2015-02-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of low electrochemical denitrification current efficiency, poor selectivity of reaction products and the need to add H in the existing method for removing nitrate nitrogen from water. 2 problem, and provide a device for removing nitrate nitrogen in water and its application method

Method used

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  • Device for removing nitrate nitrogen in water and application method of device

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 Describe this embodiment, a device for removing nitrate nitrogen in water in this embodiment includes a DC power supply 1, a pH value controller 2, a micro peristaltic pump 3, a microfiltration membrane module 4, an inlet pump 5, a first circulation pump 6, an outlet Water pump 7, cathode chamber 8, cathode plate 9, anode plate 10, anode chamber 11, second circulation pump 12, proton exchange membrane 13 and return pipe 14; The positive pole of described DC power supply 1 is connected with anode plate 10, and described anode The plate 10 is arranged in the anode chamber 11, the middle part of the anode chamber 11 is provided with a water inlet and connected with the water outlet of the second circulation pump 12, and the bottom of the anode chamber 11 is provided with a water outlet and connected with the second circulation pump 12 connected to the water inlet; the negative pole of the DC power supply 1 is connected wit...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the cathode chamber 8 is filled with Pd-Cu / Al 2 o 3 catalyst. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the cathode plate 9 and the anode plate 10 are made of graphite. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a device for removing nitrate nitrogen in water and an application method of the device. The device is used for solving such problems of existing method for removing nitrate nitrogen in water as low electrochemical denitrification current efficiency, poor selectivity of a reaction product and need of the addition of H2 during catalytic hydrogenation and comprises a direct current power supply, a pH meter, a micro-peristaltic pump, a microfiltration membrane assembly, a water inlet pump, a first circulating pump, a water outlet pump, a cathode chamber, a cathode plate, an anode plate, an anode chamber, a second circulating pump and a proton exchange membrane. The method comprise the following steps: adding the polluted water body into the cathode chamber, adding a catalyst into the cathode chamber, switching on the direct current power supply, enabling nitrate ions adsorbed on the cathode plate to accept electrons and be gradually reduced to N2; enabling generated H2 to be gathered from the cathode plate into microbubbles, diffuse and be adsorbed on the catalyst, in the presence of the catalyst and reducing the residual NO3<-> into N2 with H2 as an electron donor and discharging into the air. The device is used for removing nitrate nitrogen in water.

Description

technical field [0001] The invention relates to a device for removing nitrate nitrogen in water and a using method thereof. Background technique [0002] With the rapid development of industrial and agricultural production, the excessive use of nitrogen-containing fertilizers and the discharge of industrial wastewater, nitrate has become one of the common anionic inorganic pollutants in surface water and groundwater. At present, the nitrate nitrogen content in many urban and rural water sources in my country exceeds the standard in a large area, and the traditional water purification process cannot effectively remove nitrate in the water. When nitrate in drinking water enters the human body, it will generate nitrite under the action of the digestive system and then enter the blood, forming methemoglobin, inhibiting oxygen transfer, and causing "blue baby syndrome". In addition, nitrate nitrogen can also cause non-Hodgkin's lymphoma, gastric cancer and other diseases. In vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/70C02F1/58
CPCC02F1/4676C02F1/70C02F2101/163
Inventor 时文歆张志强张瑞君
Owner HARBIN INST OF TECH
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