A redox method for rapid regeneration of ammonium ion sieve

Abstract

The invention discloses an oxidation-reduction method for rapidly achieving regeneration of an ammonium ion sieve, aims at the problems that a conventional ion sieve regeneration method is single, relatively high in material solution loss rate in the regeneration process and low in regeneration efficiency, and aims to provide a new idea for ion sieve regeneration. The oxidation-reduction method is not limited by mechanisms of ion exchange regeneration, instead, the ammonium ion sieve is regenerated by virtue of an oxidation-reduction mechanism; the problem of a high material solution rate caused by a conventional acid regeneration ion sieve can be overcome; due to the weak oxidation property of nitrite, ammonium ions can be oxidized and a manganese dioxide framework is barely affected, and thus the solution loss rate of manganese in the secondary ammonium ion sieve regeneration process can be less than 0.03%; and an efficient ion sieve regeneration method is provided, the conventional nitric acid regeneration time is as long as 3 days, and by adopting the scheme of the invention, the regeneration rate can be up to 95% or greater within 40 minutes.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an oxidation-reduction method for rapidly realizing the regeneration of an ammonium ion sieve. Background technique [0002] The current situation of my country's water resources is the shortage of water resources and uneven distribution. Insufficient water supply and serious water pollution are the problems we face, and they are also important factors restricting the sustainable development of cities. For a long time, the treatment of municipal sewage has mainly focused on the removal of COD, SS , chromaticity, turbidity, etc. There is no particularly efficient method for the treatment of ammonia nitrogen in the current reclaimed water treatment technology. Conventional methods cannot efficiently remove ammonia nitrogen, and the ammonia nitrogen content in the effluent exceeds the standard. A series of environmental problems, such as eutrophication of water bod...

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Problems solved by technology

[0006] Aiming at the problem that the current ion sieve regeneration method is single and the material loss rate is high in the regeneration process, and the regeneration efficiency is low, the purpose of this application is to provide a new idea for ion sieve regeneration, so that it is not limited to the mechanism of ion exchange regeneration, but It adopts the redox mechanism to regenerate the ammonium ion sieve; it breaks through the problem of high dissolution loss of the material caused by the existing acid regenerated ion sieve. Due to the weak oxidation of nitrite, the ammonium ion is oxidized and has basically no effect on the manganese dioxide skeleton. Make the dissolution loss of manganese in the process of regenerating the ammonium ion sieve each time be lower than 3 / 10,000; provide an efficient regeneration method for the ion sieve, the regeneration time of traditional nitric acid is as long as 3 days, and the regeneration scheme in this application can be completed within 40 minutes Make its regeneration rate reach more than 95%

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