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

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

Inactive Publication Date: 2013-05-01
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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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

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Experimental program
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Effect test

Embodiment 1

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

[0063] In the experiment, first put 100g of zeolite into ammonia solution (100mg NH 4 + -N), after 30 minutes of adsorption, the total amount of ammonia adsorbed by the zeolite is measured, and the zeolite containing ammonia (64mg NH 4 + -N / 100g zeolite) 100g into the 300mL regenerating solution (Na 2 SO 4 ; 0.5g / L, NaCl; 1.0g / L) in the electrolytic cell 14, turn on the power supply 11, adjust the current, and make the current density 40mA / cm 2 . After 2 hours of r...

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. After 2 hours of reaction, no ammonia is detected in the regeneration solution, and the concentration of nitrate nitrogen in the regeneration solution is less than At 10.0 mg / L, the ratio of ammonia in the zeolite converted to nitrogen is greater than 96%. After the zeolite was regenerated, its adsorption capacity was tested, and the adsorption capacity reached the level before use. Repeated use of this regeneration solution to regenerate the zeolite 5 times, the adsorption capacity of the zeolite can still be fully recovered.

Embodiment 3

[0067] Electrolysis device as attached figure 2 , As shown in 3, the electrolytic cell 22 (reactor) is a 5cm×5cm×15cm=375cm 3 Rectangular water tank, the actual volume used in electrolysis is 200cm 3 . Made of polyethylene, the cathode 32 is a Cu / Zn (Cu: 62.2wt.%; Zn: 37.8wt.%) electrode, and the anode 31 is Ti / Pt-IrO 2 The electrode and the cathode 32 are placed in the center of the electrolytic cell 22. A DC voltage stabilizer is used as the power source 21, the effective voltage is 0-50V, and the effective current is 0-5A. In the experiment, a zeolite containing a certain amount of ammonia (64mg NH 4 + -N / 100g zeolite) 100g is put into the electrolytic cell 22, 300mL regenerated liquid is passed through the water inlet 34 (Na 2 SO 4 ; 0.5g / L, NaCl; 1.0g / L) into the circulation tank 24, turn on the power 21, circulation pump 23 and magnetic stirrer 25, the current density is adjusted to 40mA / cm 2 . After 2 hours of reaction, no ammonia was detected in the regeneration soluti...

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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 treatment method for the regeneration of an ammonia adsorbent, in particular to a method for regenerating the ammonia adsorbent and simultaneously obtaining a harmless treatment of the regenerated liquid and a device used in the same. Background technique [0002] At present, my country's water pollution problem is already in a more serious situation. According to statistics from the Ministry of Water Resources, polluted river lengths (including Type IV and Type V river lengths accounted for 27.7% of the total river length, and rivers exceeding Category V accounted for 15%) have accounted for 42.7% of the total river length of 65,405km. The super-V rivers that are completely polluted and lose the use value of water account for 15% of the total river length. Among them, ammonia is one of the main pollution indicators. In some areas of Europe, ammonia pollution is also more serious. The current standard of the World Health Organi...

Claims

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Application Information

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