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Efficient desorption system and method for magnetic resin

A magnetic resin and desorption technology, applied in the direction of separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low desorption efficiency, decreased adsorption capacity of magnetic resin, and difficult wastewater treatment, etc., to achieve improved The effect of mixing efficiency, sufficient desorption reaction and simple structure

Active Publication Date: 2021-03-19
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of low desorption efficiency in the process of using traditional liquid desorption agent for desorption and regeneration of magnetic resin, decreased adsorption capacity of magnetic resin after desorption, and difficulty in wastewater treatment after desorption, the present invention provides a magnetic resin Efficient desorption system and method for

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  • Efficient desorption system and method for magnetic resin

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Effect test

Embodiment 1

[0041]A high-efficiency desorption method for magnetic resin in this embodiment includes vertically setting zinc rods in a magnetic resin filter tank filled with ammonia nitrogen adsorption and saturation, wherein the height of the zinc rods is the same as the depth of the resin filter tank, and the resin filter tank One zinc rod with a diameter of 10cm is provided per square meter. Turn on the steam distributor, pass water vapor from bottom to top into the magnetic resin filter tank saturated with adsorbed ammonia nitrogen, control the water vapor pressure to 0.2MPa, water vapor evenly passes through the magnetic resin and zinc rods, and the residence reaction time of water vapor is 6h. During the steam feeding process, the vibrating filter screen is vibrated at a frequency of 30 Hz to accelerate the mixing of water vapor and magnetic resin. Under the catalysis of zinc, water vapor dissociates to form hydrogen ions and hydroxide ions, and hydrogen ions replace ammonia nitroge...

Embodiment 2

[0045] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that: a high-efficiency desorption method of magnetic resin in this embodiment includes vertically setting zinc rods in a magnetic resin filter tank filled with ammonia nitrogen adsorption saturation, wherein The height of the zinc rod is the same as the depth of the resin filter tank, and there are 3 zinc rods with a diameter of 5 cm per square meter in the resin filter tank. Turn on the steam distributor, pass water vapor from bottom to top into the magnetic resin filter tank saturated with adsorbed ammonia nitrogen, control the water vapor pressure to 0.3MPa, water vapor evenly passes through the magnetic resin and zinc rods, and the residence time of water vapor is 8h. During the steam feeding process, the vibrating filter screen is vibrated at a frequency of 60Hz to accelerate the mixing of water vapor and magnetic resin. Under the catalysis of zinc, water vapor dissociates ...

Embodiment 3

[0049] The basic content of this embodiment is the same as that of Embodiment 1, the difference is that: a high-efficiency desorption method of magnetic resin in this embodiment includes vertically setting zinc rods in a magnetic resin filter tank filled with ammonia nitrogen adsorption saturation, wherein The height of the zinc rod is the same as the depth of the resin filter, and two zinc rods with a diameter of 15cm are arranged per square meter in the resin filter. Turn on the steam distributor, pass water vapor from bottom to top into the magnetic resin filter tank saturated with ammonia nitrogen, control the water vapor pressure to 0.25MPa, water vapor evenly passes through the magnetic resin and zinc rods, and the residence time of water vapor is 7h. During the steam feeding process, the vibrating filter screen is vibrated at a frequency of 45Hz to accelerate the mixing of water vapor and magnetic resin. Under the catalysis of zinc, water vapor dissociates to form hydro...

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Abstract

The invention discloses an efficient desorption system and method for magnetic resin, and belongs to the field of resin regeneration. The desorption system comprises a magnetic resin filter tank and asteam distributor, wherein the steam distributor is arranged at the bottom of the magnetic resin filter tank, and a zinc bar is vertically arranged in the magnetic resin filter tank; the water vaporis introduced into the magnetic resin filter tank through the steam distributor and is dissociated into hydrogen ions and hydroxyl ions under the catalytic action of the zinc bar; then ammonium ions in the ammonia nitrogen adsorption saturated magnetic resin are replaced with hydrogen ions to obtain the hydrogen type magnetic resin. In the method, the water vapor and zinc are adopted to replace asodium chloride solution for desorption of the magnetic resin, so that high-concentration salt-containing wastewater is not generated after desorption, subsequent treatment of salt-containing waste liquid is avoided, and the hydrogen type magnetic resin keeps high adsorption capacity to ammonia nitrogen.

Description

technical field [0001] The invention belongs to the field of resin regeneration, and more specifically relates to a high-efficiency desorption system and method for magnetic resin. Background technique [0002] Most of the traditional resin regeneration methods are treated with liquid desorbent acid-base or sodium chloride to achieve the desorption of the adsorbate in the resin, but the traditional method will lead to a large amount of high-salt wastewater after desorption, and this type contains desorption Subsequent treatment of high-salt wastewater is difficult. In addition to liquid desorbent regeneration, gaseous steam desorbent regeneration can also be used. [0003] After searching, it is found that the application number 201010294942.7, the application date of which is September 29, 2010, discloses a desorption method in which the desorbent is reused. The method includes adsorption treatment of wastewater with adsorption resin, adsorption The resin that reaches the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/28C02F101/30
CPCB01J20/3425B01J20/3466C02F1/285Y02P10/20
Inventor 姜笔存万成陶胡进王强杨军
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND