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Ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method and device

A harmless treatment and ammonia adsorption technology, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve secondary pollution and other problems, and achieve the effects of automation, easy automation, and convenient operation

Inactive Publication Date: 2010-10-20
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and device for the regeneration of the ammonia adsorbent and the harmless treatment of the regeneration liquid, so as to solve the secondary pollution in the prior art, and the regeneration of the adsorbent and the regeneration of the regeneration liquid cannot be completed at the same time. Defects of harmless treatment

Method used

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  • Ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method and device
  • Ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method and device
  • Ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Electrolyzer as attached figure 1 As shown, the electrolytic cell 14 is a cylindrical water tank with a volume of 400 mL, which is made of polyethylene, the cathode 13 is a Cu / Zn (Cu: 62.2 wt. %; Zn: 37.8 wt. %) electrode, and the anode 12 is a Ti / Zn electrode. Pt-IrO 2 Electrode, a DC voltage stabilizer is used as power supply 11, its effective voltage is 0-50V, and its effective current is 0-5A. The volume of the regeneration solution for each electrolysis is 300mL, and the effective use area of ​​the electrode is 50cm 2 .

[0063] In the experiment, 100g zeolite was first put into ammonia solution (100mg NH 4 + Ammonia was adsorbed in -N), after 30 minutes of adsorption, the total amount of ammonia adsorbed by the zeolite was measured, and the zeolite (64 mg NH) containing ammonia was 4 + -N / 100g zeolite) 100g is put into 300mL regeneration solution (Na 2 SO 4 0.5g / L, NaCl; 1.0g / L) in the electrolytic cell 14, turn on the power supply 11, regulate the current...

Embodiment 2

[0065] The method and device for removing ammonium salt in the regeneration solution are as in Example 1, but the concentration of NaCl in the regeneration solution is increased to 1.5g / L, and after 2 hours of reaction, no ammonia is detected in the regeneration solution, and the nitrate nitrogen concentration in the regeneration solution is less than At 10.0 mg / L, the conversion ratio of ammonia in zeolite to nitrogen is greater than 96%. After the zeolite was regenerated, its adsorption capacity was tested, and the adsorption capacity completely reached the level before use. The zeolite can be fully recovered by reusing the regeneration solution for 5 times of regeneration.

Embodiment 3

[0067] Electrolyzer as attached figure 2 , as shown in 3, the electrolytic cell 22 (reactor) is a 5cmx5cmx15cm=375cm 3 The cuboid water tank, the actual volume used in electrolysis is 200cm 3 . Made of polyethylene, the cathode 32 is a Cu / Zn (Cu: 62.2 wt.%; Zn: 37.8 wt.%) electrode, and the anode 31 is Ti / Pt-IrO 2 Electrode, cathode 32 is placed in the center of electrolytic cell 22. A DC voltage stabilizer is used as the power supply 21, and its effective voltage is 0-50V, and its effective current is 0-5A. The zeolite containing a certain amount of ammonia (64 mg NH 4 + -N / 100g zeolite) 100g is put into the electrolytic cell 22, and 300mL regeneration solution is passed from the water inlet 34 (Na 2 SO 4 0.5g / L, NaCl; 1.0g / L) is put into the circulation tank 24, the power supply 21, the circulation pump 23 and the magnetic stirrer 25 are turned on, and the current density is adjusted to 40mA / cm 2 . After 2 hours of reaction, no ammonia was detected in the regenerat...

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Abstract

The invention discloses an ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method and a device; the method comprises the following steps that: in an electrobath, using an electrode comprising Fe, Ti, Al, Pd, Cu, Zn, Sn, Cu / Zn, Cu / Pd or Ti / Pd as the cathode, using an insoluble electrode comprising Pt, Ir, Ru, Pd or Pb as the anode, using the solution containing a chloride ion compound as the electrolyte, putting ammonia adsorbent after ammonia adsorption saturation into the solution containing the chloride ion compound, and electrolyzing for 1 to 5h under the current density of 10 to 50mA / cm2. The invention carries out regeneration liquid pollution-free disposal while carrying out adsorbent regeneration, thereby reducing the regeneration cost of the ammonia absorbent, preventing secondary pollution and realizing the reuse of the regeneration liquid, and the device for implementing the ammonia adsorbent regeneration and regeneration liquid pollution-free disposal method has the advantages of simple manufacturing, convenient operation and easy automation realization; and in addition, the regeneration disposal can be fully completed in a single reaction device without other reactors.

Description

technical field [0001] The invention relates to a method for regenerating an ammonia adsorbent, in particular to a method for regenerating an ammonia adsorbent and obtaining harmless treatment of the regenerated liquid at the same time, and a device used therefor. Background technique [0002] At present, my country's water pollution problem has been in a more serious situation. According to the statistics of the Ministry of Water Resources, among the national rivers, polluted river lengths (including Class IV and Class V river lengths account for 27.7% of the total river length, and super-V class river lengths account for 15%), accounting for 42.7% of the total river length of 65,405km. 15% of the total river length is super V rivers that are completely polluted and lose the use value of water. Ammonia is one of the main pollution indicators. In some parts of Europe, ammonia pollution is also more serious. The current World Health Organization (WHO) guideline standard fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/461
Inventor 李淼冯传平张振亚
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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