The preparation process and principle of ultrapure water

Ultra-pure water preparation process

In the process of production and operation of the equipment, it is necessary to check the whole equipment is like, whether the connection between the pipe is closed, beware of dripping, after checking the equipment, open the raw water (tap water) valve, open the total power switch,

Then gradually open the raw water pump. After the high pressure pump is opened, stay in the machine for a short period of time to check whether the equipment is running abnormally. Observe the activated carbon filter, compressed activated carbon filter,

Guard filter, anti-penetration equipment inlet and outlet water pressure, to ensure that the inlet and outlet water pressure difference of each filter equipment within a certain range (< 0.1mpa), at the same time to control RO inlet water, middle, concentrated water pressure

Within the required range, control the RO flow, RO backflow, RO concentrated water flow and make the water after RO conductivity less than 20uS/cm.

Open the booster pump and open the first outlet valve when the ultrapure water is needed to be installed. The inlet and outlet water pressure of the mixed bed, the pressure of the precision filter and the outlet water pressure of the mixed bed should be well controlled to ensure the outlet water is within the required range

The resistivity is greater than 10MQ-cm. In this process, attention should be paid to the water storage in the pure tank, and it is strictly prohibited to evacuate! At the same time, in order to prevent excessive water storage resulting in poor water quality, affecting the life of mixed bed resin, storage tank

The water in the water should be controlled below the float. After use, close the total power supply, close the raw water inlet valve and the ultrapure water outlet valve to prevent the tap water and air from flowing back into the filtration equipment and damaging the equipment.

Principle of ultrapure water preparation

1. The preliminary adsorption filtration stage includes hive filter, activated carbon filter, compressed activated carbon filter and guard filter

① the main function of hive filter is to remove the colloid and suspended particles greater than 10um

(2) The main role of activated carbon filter is activated carbon use of its own good adsorption of the remaining chlorine gas and small molecular organic matter in the water trapped in the filter, with the filter away

(3) The main role of compressed activated carbon is to use stronger adsorption than activated carbon deeper from the raw water to remove the remaining chlorine gas and small molecular organic matter, to ensure anti-permeability water quality requirements

(4) The security filter is also the last step to remove the colloid and suspended particles greater than 5um from the raw water, to further ensure the anti-permeability water quality requirements