1、 Physical regeneration process:

This process is suitable for filtering media with fewer impurities and less blockage of titanium filter elements. For example, ozone disinfection and filtration, air filtration, etc.

1. Backflushing: Backflushing with purified water (deionized water) for 15 minutes, with a backflushing pressure less than 0.4 Mpa, or backflushing with clean air (steam), with a backflushing pressure less than 0.4 Mpa.

2. Ultrasonic cleaning: Place the titanium rod into an ultrasonic cleaning pool, clean for 60 minutes, then remove it, rinse with deionized water or distilled water for 15 minutes, and dry and sterilize it.

2、 Chemical treatment process:

This process is suitable for titanium filter cartridges with severe blockage and complex filtration media components (such as decarbonization filtration and filtration of protein containing media with high viscosity).

1. Alkali washing process: First of all, if it is newly used or discontinued during holidays, it should be soaked in 1% NaOH analytical alcohol solution for 30 minutes. Before soaking, it should be soaked in regular water and then placed in an alkaline solution. After soaking, it should be rinsed with deionized water twice or more, each time not less than 30 minutes. The water pressure should be 0.2-0.3 Mpa. After washing, it should be placed in still water until there are no floating objects (lamp test), and the pH value should be tested to be neutral.

2. Pickling process:

2.1 Configuration of cleaning solution:

Potassium dichromate (or sodium) 5% (absolute dry)

Drinking water 1000g

Concentrated sulfuric acid (industrial use) added to 2000ml [separator]

2.2 Preparation method:

Take potassium dichromate (or sodium) crystals or fine powder, heat water to dissolve at 60-80 degrees, slowly add concentrated sulfuric acid (94% -96%) to a sufficient amount, and start adding acid slowly. Stir while adding. After adding 1200ml, potassium dichromate (or sodium) completely dissolves, and when the color changes from brown red to deep red, the speed can be slightly faster until it is all added. If there is still undissolved acid after adding it, it can be reheated until dissolved, cooled, and sealed for future use.

2.3 During the configuration process, pay attention to the following:

2.3.1 When adding acid in the configuration, red chromic anhydride (CrO2) precipitates first, and can be dissolved by continuing to add acid. In use, especially in dilute situations, crystallization precipitates are common, also known as chromic anhydride crystallization, and should not be discarded. It can be used in the future.

2.3.2 This product is specifically designed for cleaning titanium rod TA-60 and other cleaning utensils, and has a strong oxidizing effect. When concentrated sulfuric acid meets potassium dichromate, red chromic anhydride needle like crystals precipitate, sometimes generating yellow sulfuric acid and chromium trioxide. After heating, [O] ↑ can be generated.

K2C2r2O7+4H2SO4 → Cr2 (SO4) 3+4HO+K2SO4+3 [O] ↑

In addition to its ability to synthesize salts with various substances, concentrated sulfuric acid also has an oxidizing effect, especially when heated:

K2SO4 → H2O+SO2+[O] ↑

Cleaning solution can remove general dirt, grease, and metal particle impurities attached to the wall of the device, and can kill microorganisms and damage heat sources. Before soaking in cleaning solution, it is necessary to wash the alkaline solution thoroughly, otherwise fatty acids may precipitate and contaminate the filter element.

If the brownish red color in the cleaning solution turns green, it indicates a decrease in oxidation ability and should not be used again.

If the acid concentration decreases to below 85%, the decontamination ability will be greatly reduced, so it is not advisable to add more water in the prescription.

2.3.5 When preparing cleaning solution, concentrated sulfuric acid should be slowly added to potassium dichromate aqueous solution, and stirred while pouring. Never pour water into acid to prevent personal accidents caused by sudden heat explosions.

2.3.6 Cleaning solution should not be mixed with alcohol or caustic soda to avoid explosion.

2.3.7 Cleaning solution is easy to absorb water and should be stored in a sealed container for future use.

After the cleaning solution is prepared, dilute it twice before use, and maintain the solution concentration at 2.5% -3%.

2.4 Cleaning steps:

2.4.1 Remove the filter element.

2.4.2 Rinse the inner and outer walls with injection water or filtered distilled water for 3 minutes at a temperature of about 60 ℃.

2.4.3 Use compressed air (note: oil mist points are not allowed to be mixed in the air) to blow dry and clean the water droplets.

2.4.4 Soak in cleaning solution (at a concentration of 2.5% -3%) for about 15 minutes and remove.

2.4.5 Rinse the inside and outside with deionized water or distilled water about three times, with a water pressure of 0.3-0.35Mpa and a temperature below 80 ℃. Normal temperature is also acceptable.

2.4.6 Dry the residual water of the components with hot steam and directly place it in the steam sterilization cabinet for more than 40 minutes.

2.4.7 Wash with less water for injection and bake at 112 ℃ for at least 1 hour.

2.4.8 Place it in a sterilization box for airtight protection.

2.4.9 Conduct spot checks before daily use in each shift.

3、 Bubble test inspection:

1. The liquid should be tested using injection water or filtered distilled water.

2. The liquid level is 5-10mm higher than the surface of the component.

3. Air pressure 0.2-0.3Mpa (gas does not allow oil mist points).

4. After ventilation, observe the pore distribution and bubble point pressure.

5. Observe that no bubbles are allowed to occur at the threaded nozzle and head.

6. Bubbles are not allowed to occur at the welding junction between the head piece and the filter element.

7. During operation, rotate the center axis 360 degrees parallel to the horizontal plane and observe for one week for inspection.

8. Record the inspection process and carefully fill out the inspection form.

9. Indicate the batch number and usage time, and keep it on file for future reference.