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Ammonia-nitrogen adsorption removal and electrolytic regeneration reactor and use method thereof

An electrolytic regeneration and reactor technology, applied in chemical instruments and methods, special treatment targets, water pollutants, etc., can solve the problem of non-polluting and effective regeneration of adsorbent materials, which has not been more effectively solved, and has not solved the problem of NaClO storage. , can not significantly improve the zeolite ammonia nitrogen adsorption capacity and other problems, to achieve the effect of small footprint, small investment, and reduced process operating costs

Inactive Publication Date: 2018-11-13
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The physical roasting method is to treat the adsorbent with saturated adsorption at high temperature to convert the adsorbate into gas or strong volatile substances, thereby restoring the adsorption capacity of the adsorbent. However, some researchers have found that "the thermal modification method cannot significantly improve the ammonia nitrogen adsorption of zeolite." Capacity, on the contrary high temperature will destroy its structure” (Environmental Chemistry, 2016, 35(5): 1058-1066)
The chemical regeneration method is effective and takes a short time, but the generated regeneration solution must also be treated, otherwise it will cause secondary pollution, and it does not solve the storage problem of NaClO and other chemicals.
Biological regeneration uses the degradation of microorganisms to adsorbate to achieve desorption regeneration of the adsorbent, but the regeneration rate of this method is slow and the efficiency is low, and the microbial activity is greatly affected by the temperature
Pollution-free and effective regeneration of adsorbent materials has not been more effectively addressed, becoming a limiting factor for their wider use
[0006] In addition, there is a patent (CN 105314704A) that proposes a treatment method that uses sodium-modified zeolite to adsorb ammonia nitrogen combined with sodium chloride electrolysis water for regeneration, effectively removes ammonia nitrogen and completes regeneration, but this method does not consider the impact of calcium ions after multiple regenerations. Due to the impact of regeneration, excessive acidification of regeneration solution and electrode corrosion, there will still be secondary pollution, and the adsorption bed device is relatively complicated, and the operation steps are cumbersome and time-consuming

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  • Ammonia-nitrogen adsorption removal and electrolytic regeneration reactor and use method thereof

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Embodiment 1

[0042] Such as figure 1 As shown, an ammonia nitrogen adsorption removal and electrolytic regeneration reactor includes an adsorption column system 1, a water inlet pump 2, a water inlet valve 3, a water outlet valve 4, an electrolytic cell 5, a regeneration liquid inlet pump 6, and a regeneration liquid inlet valve 7, Regenerated liquid outlet valve 8, power supply 9, electrode 10, blower 11, return pipe 12, the inlet of the adsorption column system 1 is located at the bottom, the outlet is located at the top, the inlet is provided with an inlet valve 3, and the inlet pump 2 passes through the pipeline in turn The water inlet valve is connected to the inlet of the adsorption column system 1, and the wastewater containing ammonia nitrogen enters the adsorption column system 1 from the bottom of the adsorption column system 1 from bottom to top. The adsorption material filled in the adsorption column system 1 is zeolite material.

[0043] The electrolytic cell 5 is connected t...

Embodiment 2

[0053] see figure 1 , a method for efficient removal and electrolytic regeneration of ammonia nitrogen in wastewater, comprising an adsorption unit and a regeneration unit. The adsorption unit includes an adsorption column system 1 , an inlet pump 2 , an inlet valve 3 and an outlet valve 4 . The regeneration unit includes an electrolytic tank 5 , a regeneration liquid pump 6 , a power supply 9 , electrodes 10 and a blower 11 .

[0054] Sewage containing ammonia nitrogen enters the zeolite adsorption column with a hydraulic retention time of 15 minutes from bottom to top through the water inlet of the adsorption column system 1. The zeolite removes ammonia nitrogen in the sewage through adsorption and ion exchange, and gradually tends to saturation. When the effluent ammonia nitrogen is close to When the discharge standard requires, close the water inlet valve 3 to stop water intake, and turn to the regeneration stage. During regeneration, the electrode 10 is lowered and subm...

Embodiment 3

[0056] The method for ammonia nitrogen adsorption removal and electrolysis regeneration reactor is characterized in that it comprises the following steps:

[0057] (1) Adsorption stage: Wastewater containing ammonia nitrogen enters the adsorption column with a hydraulic retention time of 5 minutes from bottom to top through the inlet pump and inlet valve from the inlet of the adsorption column system. Ammonia nitrogen, after 5 hours of adsorption, gradually tends to be saturated. When the effluent ammonia nitrogen is close to the requirements of the discharge standard, stop the water intake and enter the regeneration stage; the adsorption material is activated carbon;

[0058] (2) Regeneration stage: Lower the electrode into the regeneration solution in the electrolyzer, and electrolyze the chloride ion solution to generate hypochlorite. The electrolysis time is 0.5h. After the electrolysis is completed, the electrode is raised and dried by blower; in the electrolyzer The rege...

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Abstract

The invention relates to an ammonia-nitrogen adsorption removal and electrolytic regeneration reactor and a use method thereof. The ammonia-nitrogen adsorption removal and electrolytic regeneration reactor comprises an adsorption column system (1) and an electrolytic tank (5), the electrolytic tank (5) is connected with the adsorption column system (1) through a pipeline, a regenerated liquid feedpump (6), a regenerated liquid feed valve (7) and a parallel return pipe (12) are arranged on the pipeline, ammonia-nitrogen containing wastewater enters the adsorption column system (1), after ammonia-nitrogen is adsorbed to realize saturation, the regenerated liquid feed pump (6) and the regenerated liquid feed valve (7) are opened, regenerated liquid in the electrolytic tank (5) is pumped intothe adsorption column system (1), the ammonia-nitrogen adsorbed on adsorption materials is desorbed, the regenerated liquid feed valve (7) is closed after regeneration is finished, and the regenerated liquid returns to the electrolytic tank (5) through the return pipe (12). Compared with the prior art, the ammonia-nitrogen adsorption removal and electrolytic regeneration reactor has the advantages of high ammonia-nitrogen removal efficiency, high adsorption material regeneration rate, good regenerated liquid storage stability, long electrode service life and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a system for efficiently removing ammonia nitrogen in waste water, a method for regenerating an adsorption material, and recycling an electrolyte. Background technique [0002] Ammonia nitrogen is the main form of nitrogen in the aqueous environment and one of the main pollutants of water eutrophication. According to the data released by the "China Water Resources Bulletin" in 2016, in the evaluation of 235,000 km of rivers in the country, 76.9% of rivers are classified as Class I to Class III, and 9.8% of rivers are inferior to Class V; , Grade IV~V, and inferior Grade V lakes accounted for 23.7%, 58.5%, and 17.5% of the total number of lakes in the total evaluation, medium nutrient lakes accounted for 21.4%, eutrophic lakes accounted for 78.6%, and ammonia nitrogen is one of its main pollution items. [0003] During the "Twelfth Five-Year Plan" period, my countr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F101/16
CPCC02F1/42C02F2101/16C02F2303/16
Inventor 周振羌佳鑫张伟黄景叶小芳庞红建陈柳宇郑月安莹
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER