One. Cation exchange resin

1. after the failure of water backwashing resin, the resin layer to check backwash water is clear.

2. regeneration: Yang resin regeneration level of 100 kg 100% pure hydrochloric acid / M 3 resin. The regeneration agent concentration was formulated as 4~5% with the addition of brine, and the regeneration time was about 1 hours.

3. replacement: with the same flow rate of the addition of salt water replacement for at least 40 minutes.

4. Cleaning: by electrodialysis water according to the normal water flow of resin bed for cleaning (maximum flow rate does not exceed 20 m / h) for a minimum of 40 minutes.

Two. Anion exchange resin

1. after the failure of water backwashing resin, the resin layer to check backwash water is clear.

2. regeneration: anion resin regeneration level of 100 kg 100% pure sodium hydroxide / M 3 resin. The regeneration agent concentration was formulated as 4~5% with the addition of brine, and the regeneration time was about 1 hours.

3. replacement: with the same flow rate of the addition of salt water replacement for at least 40 minutes.

4. cleaning: with the exception of the carbon in water according to the normal flow of water flow on the resin bed cleaning (flow maximum not more than 20 m / h) to the effluent conductance < 5 s/cm check.

Mixed bed resin regeneration steps

One. In vivo regeneration

1. Resin backwashing stratification: after the failure of the mixed bed resin, with hydraulic backwash the complete separation of the cation and anion exchange resin and backwash expansion rate of at least 100%, quiescent settling.

2. anion resin regeneration: the level of regeneration is 200 kg 100% pure sodium hydroxide / M 3 resin. Demineralized water will be recycled agent concentration preparation is 4-5%, lye from above into the exchanger, waste water discharged from the ranks, and from the bottom of the exchanger in demineralized water, flow control to prevent the lye in the cationic resin layer, regeneration time of about 1 hour more.

3. Anion resin replacement: demineralized water flow with regeneration, replacement of at least 40 minutes, bottom at the same time to enter the desalted water, liquid waste from ranked discharge.

4. Anion resin cleaning: flow for 20 meters / hour in addition to saline to wash the anion resin bed, wastewater discharged from the ranks, bottom and into the demineralized water, rinse to discharge liquid without phenolphthalein alkalinity.

5. Yang resin regeneration: the level of regeneration is 200 kg 100% pure hydrochloric acid 3 resin. For removing saline regenerant concentration of the preparation is 4-5%, the acid liquid from the bottom into the exchanger, waste water discharged from the ranks, also from the upper part of the exchanger into demineralized water, flow control to prevent acid fluid into the anion resin layer, regeneration time of about 1 hour more.

6. Yang resin replacement: in addition to the brine flow rate with the volumes of students, replacement of at least 40 minutes, upper should also enter the desalted water, liquid waste from ranked discharge.

7. Yang resin cleaning: flow for 20 meters / hour in addition to saline to wash the cation resin bed, wastewater discharged from the ranks, upper should also enter the desalted water, rinse to discharge liquid acidity of methyl orange.

8. is flush: from the upper part of the switch to the removal of salt water on the anion, cation resin layer for flushing, flushing to the bottom of the water conductance < 2 s/cm.

9. Mix.: the mixed bed exchanger in water on the resin layer is up to 20 cm, into the purified compressed air, the cation and anion exchange resin are mixed evenly.

10. cleaning: after mixing the resin bed with the addition of salt water to the water to clean the conductivity of the 0.2 s/cm can be put into use.

Two. In vitro regeneration procedure

1. Resin backwashing stratification: after the failure of the mixed bed resin, with hydraulic backwash the complete separation of the cation and anion exchange resin and backwash expansion rate of at least 100%, quiescent settling.

2. the positive and negative resin are respectively moved to the regeneration of the in vitro regeneration tank. Specific regeneration with fixed bed Yang, anion resin, the level of regeneration were 200 kg 100% pure hydrochloric acid / M 3 resin and 200 kg 100% pure sodium hydroxide / M 3 resin.

3. The regeneration of cation and anion exchange resin good moved to a mixed bed exchanger in the in vitro and mix well. In order to prevent the re resin layer and adding resin in the mixed bed exchanger up into 20cm high demineralized water.

4. cleaning: after mixing the resin bed with the addition of salt water to the water to clean the conductivity of the 0.2 s/cm can be put into use.