[Hongjie Water Service] Detailed explanation of the replacement cycle of various consumables for reverse osmosis pure water equipment

At present, many industries require the use of water treatment equipment, such as pharmaceuticals, healthcare, laboratories, etc., and many industries have certain explicit requirements for water. In order for water to meet production needs, good water treatment equipment is essential. But even if the equipment is good, there is still a replacement cycle for accessories. Let's take a look at the detailed introduction of the replacement cycle for consumables and accessories of water treatment equipment with editor Jingmiao!

The accessories and consumables for conventional water treatment equipment include quartz sand, activated carbon, softened resin, PP filter element, reverse osmosis membrane, and so on.

1、 Quartz sand

Quartz sand is mainly used for filtration and screening, which can filter out objects with large particles.

Normally, the replacement cycle for quartz sand is 8-24 months, depending on the water quality. If the water quality is not good, the lifespan of quartz sand will be shorter.

Main replacement basis: Referring to the inlet and outlet water pressure difference of the multi-media filter, the pressure difference cannot be reduced to the normal range after multiple cleaning of the system. It is recommended to replace it; The SDI value of the produced water quality is greater than 5. After multiple cleaning of the system, the SDI value cannot be reduced to within the normal range. It is recommended to replace it; The service life of quartz sand has exceeded the service life provided by the manufacturer, and it is recommended to replace it.

2、 Activated carbon

Activated carbon is mainly used for adsorption, adsorbing organic matter, iron, oxides, and residual chlorine. Protect the RO membrane from oxidation.

Replacement cycle: The replacement cycle of activated carbon is 8-24 months, mainly determined by the quality of the raw water.

Main replacement basis: Referring to the inlet and outlet water pressure difference of the activated carbon filter, if the pressure difference cannot be reduced to the normal range after multiple cleaning of the system, it is recommended to replace it; The catalytic reaction of activated carbon reduces the carbon content, resulting in a residual chlorine value of more than 0.05mg/L in the produced water. It is recommended to replace it; The service life of activated carbon has exceeded the service life provided by the manufacturer, and it is recommended to replace it.

3、 Softening resin

Softening resin mainly removes calcium and magnesium ions from water, reduces the hardness of water, and prevents these substances from damaging the reverse osmosis membrane.

The resin replacement cycle is 8-24 months, mainly determined by the quality of the raw water.

Main replacement basis: Referring to the inlet and outlet water pressure difference of the softener, if the pressure difference cannot be reduced to the normal range after multiple cleaning of the system, it is recommended to replace it; Resin poisoning and oxidation cause the hardness of the produced water to be greater than 3mg/L. If the hardness of the produced water cannot be reduced to the normal range after system regeneration, it is recommended to replace it; The service life of the resin has exceeded the service life provided by the manufacturer, and it is recommended to replace it.

4、 Precision filter element (PP filter element)

The precision filter element adopts a PP cotton cylindrical filter element to prevent ≥ 5 μ M particles enter the reverse osmosis membrane, causing the RO membrane to be easily clogged and scratched.

The replacement cycle of the filter element is 1-3 months, mainly determined by the quality of the raw water. Main replacement basis

1. Referring to the water pressure difference between the inlet and outlet of the filter, it is recommended to replace it.

2. The service life of the filter element has reached the manufacturer's recommended replacement cycle time or the internal maintenance plan replacement time of the enterprise.

5、 Reverse osmosis membrane (RO membrane)

Reverse osmosis membranes are generally made of polymer materials, with small pore sizes and surface micropores typically ranging from 0.5 to 10nm in diameter. The reverse osmosis system utilizes the function of the reverse osmosis membrane to select the permeable (semi permeable) membrane, and uses pressure difference as the power to penetrate the reverse osmosis membrane. It flows into the core tube through the production water flow channel, and then flows out into the production water pipeline at one end. Impurities in the inflow, such as ions, organic matter, bacteria, viruses, etc., are intercepted on the inflow side of the membrane, and then flow out at the outlet of the concentrated water to achieve separation and purification purposes, resulting in a low conductivity produced water quality.

The replacement cycle of the reverse osmosis membrane is 2-4 years, depending on the water quality.

Main replacement basis: The performance of the reverse osmosis membrane has decreased and cannot reach the normal range after chemical cleaning. It is recommended to replace it; When irreparable damage occurs to the reverse osmosis membrane, it affects the system operation and is recommended to replace it; The service life of the reverse osmosis membrane has exceeded the service life provided by the manufacturer, and it is recommended to replace it.

The above is the "Operation Fault Analysis of Ultrafiltration Equipment" introduced by Hongjie Water, hoping to be helpful to you.