Ozone water system design

In the feed water purification process, the aqueous ozone system is generally composed of several parts, such as pre-(pre-)ozone contact oxidation, post-ozone contact oxidation (see ozone process), ozone generation system, ozone gas source, tail gas destruction system, PLC, etc.

Here is the content:

l Ozone generation system

l Ozone gas source

Ozone generation system

Ozone is oxygen. A molecule that is ionized by a high potential electric field when it passes through a high voltage discharge area and becomes an oxygen atom. One oxygen atom is combined with one oxygen molecule again to form O3 (ozone). The ozone yield and quality fraction of the ozone water system decrease as the supply pressure increases, and its optimal working pressure is generally 0.12 to 0.13 MPa.

If the ozone mass fraction is low, the energy consumption of the aqueous ozone dispenser is also low, but the amount of oxygen consumed by ozone generation increases; if the ozone mass fraction is high, the energy consumption of the ozone generator is also high, but the amount of oxygen consumed by ozone generation is reduced. Therefore, the quality fraction of ozone should be determined after comparing the total energy consumption according to the local electricity and oxygen prices. Ozone water system backup rate should generally be greater than 30%, the backup of the number of equipment backup (hard backup) and equipment capacity backup (soft backup) two.

Ozone gas source

The gas source of an aqueous ozone dispenser can be air, liquid oxygen (LOX), or gaseous oxygen. Air ozone, ozone generation equipment investment is high, high operating electricity consumption, ozone production and quality fraction are low, ozone quality fraction is generally 3% to 4%, the production of 1 kg O3 power consumption in the 23-25 kW-h.

Liquid oxygen (LOX) ozone production, and ozone generation equipment investment is low, the operating electricity consumption is also low. The ozone mass fraction can be 18% or even higher, and the power consumption for producing 1 kg of O3 is 10-13 kW-h. However, liquid oxygen is generally purchased, and the total cost of ozone generation varies with the price of liquid oxygen.

For ozone production from gaseous oxygen, the investment of an aqueous ozone dispenser is lower than that of ozone production from the air but higher than that of ozone production from liquid oxygen. The operating electricity consumption is also somewhere in between. The ozone mass fraction can also reach 18% or even higher, and the power consumption for producing 1 kg of O3 is 11-14 kW-h.

Gaseous oxygen is generally produced on site, and the main methods of production are VPSA, VSA, and PSA. they all use molecular sieves to adsorb nitrogen from the air and allow the oxygen in the air to pass through the molecular sieve, thus achieving the purpose of air separation. When the molecular sieve is saturated with adsorbed nitrogen, the molecular sieve is regenerated by changing the pressure to shed the nitrogen. After that, the molecular sieve works again.

Deposon's aqueous ozone dispenser can effectively ensure its durability and quality issues. We also sincerely hope to develop together with friends all over the world in a positive spirit. If you wish to learn more about our products, please feel free to call us for more product information. We look forward to your call.