110T/HIntroduction to ion exchange equipment:
Ion exchange is a commonly used and traditional process in water treatment technology. When reverse osmosis was not yet mature in the 1990s, it was widely used in Chinaion exchange resinThe principle of producing pure water is to use the selectivity and equilibrium reaction principle of cation anion exchange resin to remove electrolyte ions from waterwater treatment equipmentIt can remove various anions and cations from water. With the increasing maturity of water treatment technology, reverse osmosis has basically replaced the production of pure water, but it is the equipment for high-purity water production process.
Ion exchange equipment is divided into cation exchangers, anion exchangers, etc. When raw water passes throughion exchange columnWhen there are cations in water and anions in water（HCO-Plasma and cation exchange resin in the exchange columnH+Ionic and anionic resinsOH-Ions are exchanged to achieve desalination. The different combinations of yang and yin mixed columns can achieve higher water quality requirements.But in order to effectively extend the cleaning cycle of the resin, pre-treatment is added earlier, such asquartz sand filterAnd activated carbon filters, etc., but if the incoming water conductivity is greater than300us/cmIt is not recommended to use ion exchangers,.
During the operation of ion exchange desalination, whether the cation bed or the anion bed fails first, they are regenerated simultaneously; There is also a first level bunk beddemineralization systemAdopting a mother control system, that is, the cation bed and cation bed or the anion bed and anion bed operate in parallel, and the one that fails is regenerated.The concept of counter current regeneration, where ion exchange equipment operates from bottom to top and regenerates from top to bottom, has been widely accepted

II10T/HProcess flow of ion exchange equipment:

Raw water tank → multi-media filter → activated carbon filter → cation exchanger → anion exchanger (decarbonizer can also be installed in front of the anion exchange bed)

Advantages of 10T/H ion exchange equipment:

1) Low initial investment

2) Low requirements for operators

3) Relative priceROReverse osmosis is much lower

III10T/HDisadvantages of ion exchange equipment

1) The subsequent maintenance cost is high. After using the ion exchange system for a period of time, the resin will fail and the conductivity will gradually increase, resulting in a relatively low ion removal rate. This requires the use of33%Hydrochloric acid and99%Sodium hydroxide activates its regeneration.

2) Regeneration consumes acid and alkali,

3) Due to the corrosive nature of acidity and alkalinity, it is easy to pollute the environment and requires sewage treatment facilities to facilitate the discharge of wastewater.

4) The investment in manpower is significant and requires dedicated personnel to supervise.

5) Poor stability of effluent quality

6) Unable to use water continuously (shutdown required for regeneration)

7) High water consumption for cleaning after regeneration

8) When the conductivity of raw water (i.e. tap water) is greater than300us/cmDo not perform ion exchange at this time

410T/HWhat is the reason for the consistently high conductivity of the effluent from ion exchange equipment?

（1）Cation exchange bedThe sodium ion content in the effluent is too high,When exceeding500ug/Ltime,The conductivity of the effluent from the anion bed increases significantly,High sodium ion,It may be due to the biased flow and leakage of sodium ions from the cation bed,Or the water production cycle will end,Caused by resin failure.
（2）There is a decarbonizer installed in front of the vaginal bed,We need to check the decarbonization efficiency,Sometimes it may be due to the failure to remove carbon dioxide,High content of carbonic acid in water,Increased the load on the vaginal bed,The ion exchange equipment also causes an increase in conductivity,in addition,We also need to check the surrounding air,Is it contaminated,Because of these pollutants,Can be sucked in by a blower and dissolved in water,Such as an ammonia plant,Sometimes the atmosphere may contain ammonia,After the blower is sucked in,Dissolve in water in the carbon remover,Therefore, it increases the concentration of ammonium ions in the water,As a result, it affects the increase in conductivity of the effluent from the anion bed.
（3）After regenerating the anion bed with sodium hydroxide,Not replaced properly,Or it may not be cleaned thoroughly during washing,Sodium ions remain in the anion resin,Released into water during water production,It will also increase the conductivity of the effluent.
（4）Due to negligence,Cation exchange equipment resin mixed into the anion bed,During the regeneration of the vaginal bed,Become sodium type resin mixed with anion resin,And release sodium ions during water production,therefore,The conductivity of the effluent from the anion bed is always high.

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