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Treatment method for reducing ammonia nitrogen concentration of wastewater containing ammonium perchlorate

A technology of ammonium perchlorate and ammonia nitrogen concentration, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve problems such as failure to meet discharge standards

Inactive Publication Date: 2013-12-25
XIAN AEROSPACE CHEM PROPULTION PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art that cannot reach the discharge standard, the present invention proposes a treatment method for reducing the concentration of ammonia nitrogen in wastewater containing ammonium perchlorate

Method used

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  • Treatment method for reducing ammonia nitrogen concentration of wastewater containing ammonium perchlorate

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Embodiment 1

[0023] This embodiment is a treatment method for reducing the concentration of ammonia nitrogen in wastewater containing ammonium perchlorate.

[0024] The quality of wastewater in this embodiment: the concentration of ammonia nitrogen is 556mg / L. The specific process is:

[0025] Step 1, the adjustment of pH value. The ammonium perchlorate-containing wastewater is pumped into a pH adjustment pool, and a 10% NaOH solution is added to adjust the pH of the ammonium perchlorate wastewater to 12.5.

[0026] Preparation of 10% NaOH solution: first add about 70L of tap water into a white PE barrel with a volume of 100L, then add 7.94kg of NaOH solid, and obtain a 10% NaOH solution after it is completely dissolved.

[0027] Step 2, air blow off. Ammonium perchlorate wastewater with a pH value of 12.5 in 2m 3 The flow rate of / h is pumped into the stripping tower for stripping. The stripping tower is equipped with polypropylene Pall ring packing. While pumping ammonium perchlorat...

Embodiment 2

[0033] This embodiment is a treatment method for reducing the concentration of ammonia nitrogen in wastewater containing ammonium perchlorate.

[0034] The wastewater quality of this embodiment: the concentration of ammonia nitrogen is 119.2mg / L. The specific process is:

[0035] Step 1, adjust the pH value. Pump the ammonium perchlorate-containing wastewater into the pH adjustment tank, add a 10% NaOH solution, and adjust the pH of the ammonium perchlorate wastewater to 13.

[0036] Step 2, air blow off. The ammonium perchlorate wastewater with a pH value of 13 was treated with 1.5m 3 The flow rate of / h is pumped into the stripping tower for stripping. The stripping tower is equipped with a 4.38-meter-high polypropylene Pall ring packing. When ammonium perchlorate wastewater is pumped into the stripping tower, air is introduced into the stripping tower at the same time. The air flow rate is 1.38m / s. The ammonium ion in the ammonium perchlorate wastewater is converted in...

Embodiment 3

[0041] This embodiment is a treatment method for reducing the concentration of ammonia nitrogen in wastewater containing ammonium perchlorate.

[0042] The quality of wastewater in this embodiment: the concentration of ammonia nitrogen is 1101.9 mg / L. The specific process is:

[0043] Step 1, adjust the pH value. The wastewater containing ammonium perchlorate is pumped into a pH value adjustment tank, and a NaOH solution with a mass concentration of 10% is added to adjust the pH value of the ammonium perchlorate wastewater to 13.

[0044] Step 2, air blow off. The ammonium perchlorate wastewater with a pH value of 13 was treated with 1.4m 3 The flow rate of / h is pumped into the stripping tower for stripping. The stripping tower is equipped with a 4.38-meter-high polypropylene Pall ring packing. When ammonium perchlorate wastewater is pumped into the stripping tower, air is introduced into the stripping tower at the same time. The air flow rate is 1.35m / s. The ammonium io...

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Abstract

The invention discloses a treatment method for reducing the ammonia nitrogen concentration of wastewater containing ammonium perchlorate. According to the treatment method, two steps are adopted to treat the ammonium perchlorate in the wastewater. In the first step, perchlorate ions are treated by adopting an electrolytic method. In the second step, the ammonia nitrogen concentration of the wastewater is reduced by adopting a blow-off and membrane permeation combined method. Finally, the wastewater is treated to meet standard emission requirements. According to the treatment method, voltage and current are introduced into the wastewater, an oxidation reaction happens to an interface between an anode and a solution, and a reduction reaction happens to an interface between a cathode and the solution, thus removing the perchlorate ions out of the wastewater. The ammonia nitrogen density of the wastewater is reduced by adopting the blow-off and membrane penetration method, wherein firstly, air is adopted to perform blow-off on ammonia nitrogen in the wastewater, then, the wastewater after blow-off is put into a membrane penetration treatment device to further remove the ammonia nitrogen, and finally the wastewater containing the ammonium perchlorate is treated to meet the standard emission requirements. In the treatment method, the perchlorate ions and ammonium ions in the wastewater are removed through the combination of a plurality of methods, and finally the concentration of the perchlorate ions is reduced to be less than 0.1mg / L and the concentration of the ammonia nitrogen is reduced to be less than 5mg / L.

Description

technical field [0001] The invention relates to the field of waste water environmental protection treatment, in particular to a treatment method for reducing the concentration of ammonia nitrogen in waste water containing ammonium perchlorate. Background technique [0002] Domestic solid engine charging plants produce a certain amount of wastewater when cleaning and crushing ammonium perchlorate equipment. At the same time, domestic large-scale medium-energy decommissioned or scrapped solid engines mainly use long-distance high-pressure water jets. The casing has less damage, which is beneficial to environmental protection. However, after the propellant grain is cleaned by high-pressure water jets, a large amount of waste water will be produced. Since the propellant grain contains 60% to 70% ammonium perchlorate, and the solubility of ammonium perchlorate in water is extremely high, the water contains A large amount of ammonia causes the concentration of ammonia nitrogen to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16
Inventor 黄婷王国娟楚华李新宇
Owner XIAN AEROSPACE CHEM PROPULTION PLANT
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