TPure water, electricity, oxygen, circulating cooling water, and alkaline solution.

Under alkaline conditions, oxygen and water are reduced to hydrogen peroxide on the cathode, while Na+ ions migrate from the anode to the cathode through an ion exchange membrane, forming sodium hydroxide. The cathodic reaction determines the fixed ratio at which sodium hydroxide and hydrogen peroxide are generated, with a theoretical mass fraction ratio of sodium hydroxide to hydrogen peroxide of 2.35. Sodium hydroxide is oxidized to oxygen and water on the anode. OH- is consumed on the anode and an equal amount of OH- is generated on the cathode. Therefore, sodium hydroxide is not consumed in the overall reaction system. Sodium hydroxide serves as a solvent carrier for hydrogen peroxide, which is produced at the cathode outlet, forming an advanced bleaching agent for pulp bleaching processes. Sodium hydroxide helps to improve conductivity and reduce energy consumption. The specific electrochemical reaction process is as follows:

Cathode reaction: O₂ + 2H₂O+ 2Na+ + 2e- → H₂O₂ + 2NaOH (alkaline hydrogen peroxide)
Anode reaction: 2NaOH → 1/2O₂ + H₂O +2Na+ + 2e-
Net reaction: 1/2O₂ + H₂O → H₂O₂

The equipment outputs a mixed solution of alkali and hydrogen peroxide in a certain ratio. The cathode reaction determines the fixed ratio at which sodium hydroxide and hydrogen peroxide are generated, with a theoretical mass fraction ratio of sodium hydroxide to hydrogen peroxide of 2.35. The ratio is relatively fixed but can be adjusted within a certain range.

The concentration can be adjusted between 0.5% and 5%, which is adjusted through the water replenishment amount and operating temperature of the equipment. If there are no special requirements, we generally supply hydrogen peroxide with a concentration of 3-3.5% to customers.

The reaction water used in the system is deionized water treated by a pure water machine, which does not contain any scaling ions, so scaling will not occur.

The hydrogen peroxide electrolytic generation system comes with a skid-mounted structure that needs to be installed indoors. The operating temperature of the system should be between 4-40 ℃, and the relative humidity should not exceed 60%. During equipment operation, the temperature of the electric stack and solution is 45 ℃. To ensure stable equipment operation, additional considerations need to be made for the material temperatures in the input and output of pipelines:

• The pipeline for 32% alkaline solution should ensure a solution temperature of at least 15 ℃. If not, heat and insulation are required.
• The water pipeline should ensure a temperature above 4 ℃. If not, heat and insulation are required.
• The alkaline hydrogen peroxide pipeline should ensure a temperature above 10 ℃. If not, heat and insulation are required. Specific requirements need to be determined based on the specific conditions of the project site.

The power of the standard equipment is around 160kW (P1524) and 185kW (P1528). The pure electricity consumption for producing one ton of concentrated hydrogen peroxide is approximately 3000 kWh.

To produce one ton of concentrated hydrogen peroxide, around 0.52 tons of liquid oxygen with a concentration of 99.5% are needed. But if using PSA oxygen with a concentration of 93%, the consumption increases to 0.75 tons.

Currently, we conduct routine maintenance and upkeep of the equipment once a year.

The complete equipment is controlled by PLC and can be operated through a touchscreen and computer terminal. The complete equipment can communicate with the customer's DCS system for equipment monitoring.

Phase Two Chemicals recommends using PPH material for the storage tank, and the capacity of the tank should generally exceed 50% of the total daily production volume of alkaline hydrogen peroxide.

The stacks are the core components of the equipment and are designed, developed, and produced independently by Phase Two Chemicals, without the need for imports.

The P1528 equipment weighs 9.5 tons in total (including the electric stack, empty pipes, and excluding the DC power supply).

PPH pipe is recommended to prevent alkaline hydrogen peroxide decomposition. Liquid alkali is recommended to use acid-washed and passivated stainless steel pipes of grade 304 or above. Oxygen piping is recommended to use acid-washed and passivated stainless steel pipes of grade 304 or above, and to complete degreasing. Water pipes can be determined according to the customer's site requirements.

No, the equipment outputs a mixture of alkali and hydrogen peroxide in a certain proportion. The pH of the hydrogen peroxide added in the Fenton process is acidic, and alkaline hydrogen peroxide would affect the effectiveness of the Fenton treatment.