Aerating filter with molecular sieve prepared by adopting coal ash in power plant

Abstract

The invention relates to an aerating filter with a molecular sieve prepared by adopting coal ash in a power plant, comprising one-stage or multi-stage treatment areas, wherein at least one-stage treatment area is internally provided with an aerating half area and a filtering half area simultaneously; liquid flow flowing through the treatment area firstly flows through the aerating half area for aerating treatment and then flows through the filtering half area for molecular-sieve filtering; and the molecular sieve in the filtering half area is a W-shaped zeolite molecular sieve which is compounded by adopting the coal ash in the power plant as a raw material and KOH as an alkaline agent, and the silicon-aluminium ratio is 3.2-4.8. The aerating filter has the advantages that not only can the nitrogen and phosphorus in an eutrophic water body be synchronously and effectively removed, but also the coal ash can be recovered for preparing the molecular sieve, the waste treatment with waste is realized, the source of the raw material of the molecular sieve is wide, the cost is low, the preparation process is simple and easy, and the large-scale popularization and application can be achieved.

Description

technical field [0001] The invention relates to an aeration filter, in particular to an aeration filter using a molecular sieve made of power plant fly ash as a raw material, which is mainly used for synchronous removal of nitrogen and phosphorus from eutrophic water bodies. Background technique [0002] Molecular sieve is a commonly used method of water treatment, which can achieve a high degree of purification to facilitate the effective application of post-treatment water. The eutrophication of water caused by nitrogen and phosphorus discharge has always been one of the important problems in water treatment. Therefore, while removing particles and oxygen demand, nitrogen and phosphorus removal technologies should also be carried out simultaneously. With the increasingly stringent requirements for nitrogen and phosphorus discharge standards, traditional biological nitrogen and phosphorus removal technologies can no longer meet the requirements, and molecular sieve filtrati...

AI Technical Summary

Problems solved by technology

However, the existing molecular sieves usually only have a single strong adsorption performance for nitrogen and phosphorus, and basically cannot achieve simultaneous and effective removal of nitrogen and phosphorus. Some can only guarantee effective removal of nitrogen or phosphorus, while the other The removal effect of one kind is not good, and some need to remove nitrogen and phosphorus separately under different adsorption environmental conditions (such as different pH values) to achieve simultaneous and effective removal of the two, and some have complex preparation processes , high cost, difficult to promote and use on a large scale

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