Mixed bed regeneration method

Abstract

The invention discloses a mixed bed regeneration method, which comprises: 1) backwashing layering; 2) sedimentation; 3) first water discharge; 4) pre-mixing; 5) first regeneration; 6) second regeneration; 7) replacement; 8) rinsing; 9) cleaning; 10) second water discharge; 11) mixing; 12) resin falling; 13) water filling; 14) positive washing and water discharge; 15) positive washing and reflux; and 16) pressure relief so as to be spare. According to the present invention, with the mixed bed regeneration method, the desalination water treatment system can have high safety and high reliability,the condition that the acid liquid crossflows into other pipelines through the valve or enters the remaining mixed beds being in the normal operation state and connected in parallel with the mixed bed performing the mixed bed regeneration process can be avoided, the phenomenon that the desalination water treatment system occurs acid crossflow can be avoided, the mixed bed regeneration effect canbe effectively improved, and the mixed bed effluent cannot be polluted.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a mixed bed regeneration method. Background technique [0002] Mixed bed is a water treatment equipment that puts anion and cation exchange resins in the same exchanger in a certain proportion and mixes them uniformly before operation, referred to as mixed bed. Mixed bed is a kind of water that can produce high-purity water. The treatment equipment has the advantages of stable effluent water quality and obvious exchange end point. At present, the mixed bed process of the desalinated water treatment system is used to produce high-quality desalted water, which requires the conductivity of the produced high-quality desalted water to be less than 0.2μs / cm to meet the water demand for special steel production. [0003] Usually, in order to ensure the water quality of the product, the mixed bed needs to use acid and alkali to regenerate the anions and cations after a period of...

AI Technical Summary

Problems solved by technology

[0005] The existing production line usually adopts multiple mixed beds for parallel production, and the main water inlet pipe and the main water outlet pipe are connected in series. The safety and reliability of the existing mixed bed regeneration process are low, and it is easy for acid liquid to enter through the valve. Other pipes, affecting the regeneration effect

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