Continuous adjusting electrode distance-type desalting technology and reaction module for electric adsorption-regeneratoin

Abstract

The invention discloses a continuous adjusting electrode distance-type desalting technology and reaction module for electric adsorption-regeneration. A reactor comprises a continuous adjusting electrode distance-type desalting reactor box body 1, a raw water tank 2, a pure water tank 3, a final concentrated water tank 4, a power supply 5, a water pump 6, and electric conductivity instruments 7 and8. The salt-containing waste water dominant on garbage percolation liquid discharged water is treated by using the continuous adjusting electrode distance-type desalting technology and reaction module, the desalting rate can reach up to 42.6 percent, the removal rate of Cl- is 73.3 percent, the desalting speed is 90 mg / (L.h), the electrode regenerative rate is 97.3 percent, and the water productivity is 91.7 percent. By adopting the movable slot-controlled continuous adjusting electrode distance-type continuous electric adsorption-regeneration way, the reaction module has the characteristicsof simplicity in operation, stable current density, high desalting rate, high desalting efficiency, high electrode regeneration rate, scaling phenomenon, high water productivity and long electrode service life, the desalting and recycling of low-salt-content industrial waste water can be realized, and the prospect in the field of environment protection salt-containing industrial waste water treatment is wide.

Description

technical field [0001] The invention belongs to the field of environmental protection saline wastewater treatment, and specifically relates to a technology and a reaction module for electroadsorption-regeneration desalination that can continuously adjust the distance between electrodes, and is mainly applied to low-salt industrial wastewater that cannot meet the regeneration and reuse standards . Background technique [0002] The shortage of fresh water resources has become an imminent global problem, and the recycling of industrial wastewater is a top priority at present. The low-salt industrial wastewater represented by landfill leachate drainage usually has an electrical conductivity of 1000-4000 μS / cm, and cannot meet the standard for reuse because the salt content is difficult to further reduce. A new type of salty wastewater treatment method developed in recent years - electro-adsorption desalination technology, has the advantages of no secondary pollution, low requir...

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Problems solved by technology

In addition, the desorbed ions in the electrode regeneration stage are secondarily adsorbed to the opposite plate, resulting in a low electrode regeneration rate, which is also a problem that is difficult to solve in the process of electroadsorption-regeneration desalination. Some electroadsorption desalination devices such as Wu Fuping wrote Chinese patent CN107935132A, CN104817143A written by Tang Xinqiang, etc. all use anion and cation exchange membranes to prevent secondary adsorption in the regeneration stage, but increase economic costs and increase water flow resistance to a certain extent

[0004] In general, electro-adsorption desalination has a very broad application prospect, but the traditional electro-adsorption desalination technology is limited by the fixed electrode spacing and voltage, and has problems such as reaching the adsorption platform quickly and low electrode regeneration rate. Optimize and improve on the basis of

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