A kind of modified zeolite ammonia nitrogen adsorbent and use thereof and renovation process

A kind of modified zeolite ammonia nitrogen adsorbent and use thereof and renovation process

  • CN 102,423,684 B
  • Filed: 10/28/2011
  • Issued: 08/12/2015
  • Est. Priority Date: 10/28/2011
  • Status: Active Grant
First Claim
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1. a modified zeolite ammonia nitrogen adsorbent, is characterized in that, its preparation method is:

  • (1) first natural zeolite is carried out fragmentation, milled processed, then cross 20-40 mesh sieve, after soaking 24h with the sulfuric acid that volumetric concentration is 2%-10%, clean to pH be 6.5-7.5, at 120 DEG C of-150 DEG C of temperature, steam 16-24h, then be cooled to normal temperature after drying in 105 DEG C, for subsequent use;

    (2) by CuSO 45H 2the weight proportion of the zeolite after O and above-mentioned process is that the ratio of 1;

    3 gets CuSO 45H 2o is dissolved in ultra-pure water, mix with zeolite again, stir, 24h is reacted under 650 DEG C of hot conditions, wash away after being cooled to room temperature and do not have loaded surface particles, when to wash solution to pH being 6.5-7.5, drier under being placed in 100 DEG C of-150 DEG C of temperature, namely obtain modified zeolite ammonia nitrogen adsorbent finished product;

    Use and the renovation process of described modified zeolite ammonia nitrogen adsorbent are;

    select lucite to do adsorption column, the modified zeolite ammonia nitrogen adsorbent that 3m is high is added in post, nitrogenous effluent is squeezed into adsorption column by peristaltic pump and is carried out adsorption reaction after regulating pH to 9, after absorption 5h, backwash 10min is carried out to adsorption column, then with hydrochloric acid or sulfuric acid cleaned 50min, recovery and rinsing liquid, evaporative crystallization obtains ammonium chloride or ammonia sulfate crystal, and the adsorbent after cleaned can re-use;

    Described adsorption column adopts internal diameter to be 1.8m, highly to be the lucite post of 5.0m;

    The water inlet initial concentration of process waste water is 500-550mg/L, temperature 20-25 DEG C, and be 9 with NaOH adjust pH, flow control is at 6m/h, and treating capacity is 15m 3/ h, hydraulic detention time is 30min.

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