Pure water RO Plant common questions

How is the Multi-media filter selected? What is its working principle?

The selection of the filter is designed based on the total required feed water capacity of the system. The working principle is to filter step by step through large to small quartz sand, but it should be noted that when the pressure is too high, it should be backwashed to restore the filter performance.

How is the Cartridge filter selected? How many types of filter elements are there?

The selection of the cartridge filter is also designed based on the total required feed water capacity of the system. The common types are roughly polypropylene filter elements, honeycomb filter elements, spray-melt filter elements, pleated filter elements, etc.

How to remove iron in water?

The ferrous iron is oxidized to ferric iron by sufficient aeration, and then it is passed through a manganese sand filter to remove iron.

What instruments and meters need to be equipped in the reverse osmosis system?

1) Pollution index meter: SDI indicator used for pretreatment of the measurement system

2) Concentrated water flow meter: used to measure the flow of concentrated water in the Pure water RO Plant, and used with the produced water flow meter to determine the plant recovery rate

3) Production water flow meter: used to measure the flow rate of system production water

4) Product water conductivity meter: used to measure the system water quality

5) Pressure gauge: measuring pure water RO plant inlet pressure, inter-section pressure, concentrated water pressure, and produced water pressure.

6) Water inlet flow meter: used to measure the total water inlet flow of the system.

7) Thermometer: used to measure the temperature at which the system is running.

8) Influent PH meter: used to measure the changes in the pH value of the influent water of the system.

9) Influent water conductivity meter: used to measure the influent water conductivity of the system, and used in conjunction with the product water conductivity to determine the system's desalination rate.

10) Redox meter: used to measure the amount of oxidizing substances in the influent water to determine the degree of threat to the safety of the system.

11) High and low pressure protection switch: used to protect the system from running under low pressure (insufficient water supply) and high pressure.

The instruments and meters used in the reverse osmosis system are determined by process requirements and user costs. For common small reverse osmosis system the product water flow meter, the concentrated water flow meter, the product water conductivity meter, the pressure gauge, and the high and low pressure protection are enough for proper operation and maintenance.

Why must the reverse osmosis concentrated water discharge pipe be higher than the plant?

The concentrated water discharge valve is always open when the pure water RO plant is running, so that when the plant stops running, if the highest point of the discharge pipe is lower than the highest point of the pressure vessel, a "siphon" phenomenon will occur, and the water in the pressure vessel will Because its own weight flows out of the plant through the concentrated water discharge pipe; this is easy to cause water hammer, and the other is that the oxygen in the air will produce more or less oxidation on the reverse osmosis membrane element when it is shut down and affect the service life membrane element.

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