Fine desalination duplicate bed

Abstract

The invention discloses a fine desalination duplicate bed which can solve the problem of cross contamination in the regeneration of a mixed bed. The duplicate bed comprises a cation bed and an anion bed, and the water outlet pipe of the cation bed is communicated with the water inlet pipe of the anion bed. The barrel body of the cation bed is internally provided with a water inlet device, a first strong acid resin layer, a perforated plate hydrophobic device, a polystyrene-divinybenzene copolymer packing layer, a second strong acid resin layer and a drain device in sequence from top to bottom, and the top of the barrel body is provided with an exhaust device. The barrel body of the anion bed is internally provided with a water inlet device, a first strong base resin layer, a perforated plate hydrophobic device, a polystyrene-divinybenzene copolymer packing layer, a second strong base resin layer and a drain device in sequence from top to down, and the top of the barrel body is provided with an exhaust device. The water after the pre-desalination enters from the water inlet of the cation bed, and then enters the anion bed after exchanging ions with the strong acid resin to perform the ion exchange with the strong base resin, thereby achieving the purpose of fine desalination.

Description

technical field [0001] The invention relates to fine desalination treatment equipment, in particular to a fine desalination multiple bed. Background technique [0002] At present, domestic and foreign fine desalination treatment, almost all use a kind of equipment called mixed ion exchanger, generally referred to as mixed bed, which is to install two kinds of resins, positive and negative, in a cylinder. The equipment has a wide range of applications, and the ion exchange method, distillation method and reverse osmosis pre-desalination method are usually combined with it for fine desalination treatment. But for more than 40 years, although the inadequacies of the equipment have been continuously improved, the following defects still exist so far, mainly: during the regeneration and operation of the mixed bed, there is crossover during the separation and mixing of cation and anion resins. Pollution problems, thus affecting the regeneration of the resin, the quality of the ef...

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Problems solved by technology

[0003] The problem to be solved by the present invention is to improve the defects existing in the existing mixed bed, and to provide a fine desalination double bed with no cross-contamination during regeneration.

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