1What types of pre-filtration equipment are there for pure water equipment?

    Common types include sand filtration equipment, non-woven fabric filter element filtration equipment andPPFiber filter element filtration equipment, etc., non-woven fabric filter elements andPPThe commonly used lengths of fiber filter elements include10inch-sum20There are two types in inches. The pore size of the filter element used as a pre-filtration device for pure water equipment is usually25uThe layout of the filtration equipment before the pure water equipment also varies according to the size of the filtration water volume.

2The effect of the filtration equipment before the reverse osmosis pure water equipment

     The function of the pre-filtration equipment before reverse osmosis pure water equipment is to remove larger suspended impurities in water, preventing these impurities from entering the activated carbon filtration equipment, covering the surface of the activated carbon, and causing the capillary structure of the activated carbon to lose its ability to adsorb impurities in water.

3Activated carbon filtration equipment

     The main effect of activated carbon filtration equipment is to remove large-molecule organic substances, iron oxides and residual chlorine. Organic substances, residual chlorine and iron oxides can easily cause poisoning of ion-exchange resins. Moreover, residual chlorine and cationic surfactants not only poison the resins but also damage the membrane structure, leading toROThe reverse osmosis membrane has failed. Activated carbon filtration equipment utilizes the rich capillary pores of activated carbon to adsorb and filter large-molecule organic substances, residual chlorine, iron oxides and other colloidal substances in water. This adsorption is irreversible, meaning that activated carbon has a certain saturated adsorption capacity. Once the adsorption capacity is saturated, the activated carbon loses its adsorption function and cannot be washed away by backwashing. In addition, after activated carbon adsorbs organic matter, it provides rich nutrients and forms a large number of microorganisms in the activated carbon filtration equipment. The microbial content in the water actually increases after being filtered by activated carbon.

4What are the ways to protect activated carbon filtration equipment?

     Before the activated carbon is fully adsorbed, backwashing should be carried out regularly to flush out many bacterial clusters and suspended solids on the surface of the activated carbon. After the activated carbon is saturated with adsorption, new activated carbon should be replaced immediately; otherwise, it will formROThe irreparable harm of reverse osmosis membranes.

5Soft water equipment

     The effect of water softening equipment is to remove calcium and magnesium ions from water, thereby softening it. If there is no water softening equipment or the water softening equipment fails, calcium and magnesium salts are presentRODue to a sharp increase in concentration, insoluble deposits form on the surface of reverse osmosis membranes. "BlockingROReverse osmosis membrane pores, makingROThe service life of reverse osmosis membranes is shortened.

    The soft water equipment used for pure water production usually employs sodium-type cation exchange resin. After the resin is saturated with exchange, it is regenerated with salt. After several years of use, the degree of resin breakage becomes increasingly severe, gradually losing its softening ability. Especially when the activated carbon filtration equipment is fully adsorbed and the activated carbon is not replaced immediately, iron, organic matter and residual chlorine in the raw water will directly enter the soft water equipment, causing resin poisoning. Once the resin is damaged, it cannot be restored to its activity by regeneration. When the working AC capacity of the resin drops significantly, it should be replaced.

6,ROReverse osmosis is a pure water equipment system

     After pretreatment and achievedROThe raw water required for reverse osmosis membranesROThe core component of reverse osmosis, after filtration, becomes a pure water equipment, so it is necessary to do it wellROThe protective operation of reverse osmosis is the key to ensuring the quality of pure water equipment. During the operation of the membrane, the salt concentration on the membrane surface is higher than that in the main fluid. This phenomenon is called concentration polarization. The result of concentration polarization is that some salts accumulate on the membrane surface, blocking the water production channels of the reverse osmosis membrane and reducing the water production capacity of the membrane. When organic matter in the feed water is not continuously washed away or is periodically flushed away, it will accumulate on the membrane surface, especially some with charged surfacesROReverse osmosis membranes can attract charged organic substances and stick them to the membrane surface. The accumulation of organic matter on the membrane surface poses a more severe threat to membrane formation than the accumulation of salt on the membrane surface. Sometimes, this kind of harm is irreversible. The concentrations of organic matter and various salts on the membrane surface are much higher than those of the main water flow, which provides rich nutrients for reproduction. Many microbial colonies not only block the water production channels, but also becauseROReverse osmosis membranes themselves are also organic substances and can be decomposed by microorganisms, causing irreversible harm. Oxidizing substances in water, such as residual chlorine, accumulate on the membrane surface. After accumulating to a certain extent, the concentration exceeds that the membrane itself can accept.ROReverse osmosis membranes will be oxidized and decomposed. All the above elements makeROThe water production of reverse osmosis membranes has gradually decreased, the salt permeation rate has gradually soared, and the quality of pure water equipment has declined. Under normal circumstancesROThe service life of reverse osmosis membranes is three years.ROWhen the reverse osmosis membrane is damaged, it should be replaced immediately; otherwise, it will not only affect the water production but also the water quality.

7Principle of water treatment process

One: Quartz sand＋Activated carbon＋Softening+Security filter＋Reverse osmosis device＋Ultraviolet kill

Two: Quartz sand＋Activated carbon＋Scale inhibition system+Security filter＋Reverse osmosis device

Three: Quartz sand＋Activated carbon＋Softening+Security filter＋First-stage reverse osmosis＋Secondary reverse osmosis＋Ozone

Four: Flocculation and sedimentation＋Quartz sand＋Activated carbon＋Scale inhibition system＋Security filter＋Reverse osmosis device

Five: Quartz sand＋Activated carbon＋Softening+Security filter＋Reverse osmosis device