CN
CN
MENU

Product Center

Green Innovation · Scientific and Technological Development · Industrial Responsibility · Joint Construction of Civilized Ecology

Ozone catalytic oxidation tower

Ozone catalytic oxidation tower is an advanced oxidation equipment based on catalytic ozonation technology, widely used in the upgrading and renovation of municipal sewage treatment plants, deep treatment of industrial wastewater in chemical and pharmaceutical industries, industrial park sewage treatment, leachate treatment, surface water purification, and reclaimed water reuse projects. It is mainly suitable for the deep removal of difficult to degrade organic matter after biochemical treatment, reducing the COD of biochemical effluent to a lower level and improving biodegradability. Application scenarios include: ensuring compliance and upgrading of urban sewage treatment plants, deep treatment and reuse of industrial park wastewater, treatment of difficult industrial wastewater such as chemical, printing and dyeing, and pharmaceutical industries, reuse of shale gas extraction wastewater, decolorization and deodorization of polluted surface water bodies, etc.

National Service Hotline：400-611-6861
Product Introduction

Ozone catalytic oxidation tower is a wastewater deep treatment equipment that utilizes the strong oxidizing properties of ozone and combines catalytic technology. The core principle is that under the action of a catalyst, ozone accelerates the decomposition to produce hydroxyl radicals (· OH) with an oxidation-reduction potential of up to 2.8 eV, which non selectively attack and mineralize difficult to degrade organic matter in water, decomposing large molecular organic matter into small molecular substances until carbon dioxide and water. The equipment mainly consists of a tower body, a gas distribution system, a catalyst layer, an inlet and outlet water system, and a control system. The tower body is made of high-strength corrosion-resistant materials, and the gas distribution system is located at the bottom to evenly disperse ozone into the reaction zone. The catalyst layer is filled with a porous carrier loaded with transition metal oxides.

Technical Advantage
High removal efficiency
The COD removal rate can reach over 50% to 90%, and the chromaticity removal rate can reach over 90% to 95%. After treating a certain coal chemical wastewater with heterogeneous ozone catalytic oxidation, the effluent COD remained stable below 40mg/L, with a COD removal rate of over 50% and a chromaticity of less than 10. The removal rate of characteristic pollutants such as volatile phenols can reach over 95%.
Improving biodegradability
The BOD/COD value of recalcitrant organic matter can be increased from 0.1-0.2 to above 0.3-0.4, effectively improving the subsequent biochemical treatment effect.
No secondary pollution
The entire treatment process produces no sludge and no residue, avoiding the problem of large amounts of physical and chemical sludge generated by traditional chemical oxidation methods.
High ozone utilization rate
Catalysts can significantly improve the dissolution and decomposition efficiency of O3 in water, with an ozone utilization rate of over 85% and a treatment efficiency 2-4 times higher than pure ozone oxidation.
Low operating costs
simple process, few equipment, easy operation, and no physical and chemical sludge disposal costs. The operating cost per ton of biochemical wastewater treatment can be controlled below 0.8 yuan, and the comprehensive operating cost per ton of water can be reduced by more than 1 yuan/ton compared to traditional methods.
Small footprint
With high equipment integration, the footprint is only 1/3 to 1/2 of traditional processes such as Fenton method, making it suitable for upgrading and renovation projects with tight site conditions.
High degree of automation
Equipped with a PLC control system, it can monitor parameters such as pH, flow rate, ozone concentration, and exhaust concentration in real time, and automatically adjust the ozone dosage according to changes in water quality.
Process Selection

1. Selection by treatment stage: For advanced treatment of biochemical effluent, fixed bed catalytic oxidation towers are preferred for stable operation and low investment; Pre treatment of high concentration refractory organic wastewater using fluidized bed catalytic oxidation tower, with high mass transfer efficiency and strong anti pollution ability; The deep treatment of reclaimed water reuse adopts a combination process of "catalytic oxidation+activated carbon adsorption" to ensure stable effluent quality.

2. Select based on water quality characteristics: For high chromaticity wastewater such as printing and dyeing, papermaking, etc., choose manganese based composite catalysts with good chromaticity removal effect; High toxicity wastewater from chemical and pharmaceutical industries should be treated with efficient catalysts loaded with precious metals or transition metals; Wastewater with high chloride ion content should be treated with specialized catalysts that are resistant to chloride ion poisoning, and reaction conditions should be controlled to avoid the production of disinfection by-products.

3. Selection based on processing scale: For small-scale projects with a daily processing capacity of less than 500m ³, an integrated steel catalytic oxidation tower should be selected; For medium-sized projects with a daily processing capacity of 500-5000m ³, single tower or double tower parallel connection is selected; For large-scale projects with a daily processing capacity>5000m ³, modular design with multiple towers connected in series or parallel is adopted.

4. Selection based on process combination: The front-end needs to be equipped with biochemical treatment processes to remove most easily degradable organic matter; The backend can be equipped with sand filtration, activated carbon filtration or membrane separation processes to further improve the effluent quality; For wastewater with high COD concentration, the combination process of "Fenton+ozone catalytic oxidation" or "electrocoagulation+ozone catalytic oxidation" can be used.


Equipment Selection

Parameter Description and Selection Points

The processing scale is determined based on the design water volume, and the single tower processing capacity ranges from tens of tons/day to tens of thousands of tons/day. Large scale projects can adopt a combination of multiple towers in parallel or cascade

Effective volume V=Q × t (Q: design flow rate m ³/h, t: residence time h), needs to be calculated based on peak flow rate and reserved with margin

The tower body material is 304/316L stainless steel (corrosion-resistant, suitable for small and medium-sized equipment); Carbon steel lined with adhesive/FRP (large equipment, high cost-effectiveness); Fiberglass reinforced plastic (lightweight and corrosion-resistant, suitable for small and medium-sized applications)

The design of pressure steel pressure towers generally has a pressure resistance of 0.3-0.6MPa

The height to diameter ratio of the tower body should be controlled within 3-5 for fluidized bed type to ensure sufficient fluidization space

The gas distribution system adopts titanium microporous aeration discs or microporous aerators with uniform pore size to ensure efficient mixing of ozone and wastewater. The aerator should have ozone corrosion resistance performance

Catalyst material: Ozone specific catalyst, carrier Al ₂ O ∝/SiO ₂/activated carbon, loaded with multi metal oxides such as Mn Fe Cu. Particle size 2-6mm (fixed bed); Bulk density 0.8-1.0g/cm ³

The catalyst filling amount for a fixed bed is estimated to be 40% to 70% of the effective volume of the tower body; Add 20% to 30% of the effective volume of the reaction zone to the fluidized bed

The configuration of the ozone generator calculates the required ozone production based on the amount of ozone added. The general oxygen supply source has an ozone concentration of ≥ 120mg/L. The supporting equipment includes an oxygen generator, an internal circulation cooling water system, and an ozone dosing system

The automatic control system is controlled by PLC and equipped with instruments for online monitoring of ozone concentration, detection of exhaust ozone concentration, pH/flow/dissolved oxygen in and out of water, etc. Remote monitoring and communication via RS485

To prevent catalyst blockage, the backwash system should be equipped with a gas water combined backwash system. Air wash intensity 15-20L/(m ² · s), water wash intensity 10-15 L/(m ² · s), backwash cycle pressure difference or time control

Supporting equipment includes liquid oxygen storage tanks or oxygen generators, ozone generators, exhaust gas disruptors, backwash water pumps, stabilization tanks (when connected to biochemical/membrane treatment), and various instrument valves

Installation method: The vertical steel tower is fixed to the concrete foundation with anchor bolts, and the concrete pool type is constructed according to the requirements of civil engineering design. Equipment basic levelness error ≤ 2mm/m

Perform backwashing every 72 hours for daily maintenance; Monthly testing of catalyst activity; Evaluate system performance quarterly; The general service life of catalysts is 3-5 years (high-quality catalysts>8000h)

Ozone leakage alarm devices must be equipped in the safety protection ozone room, and the ozone concentration in the workplace air should be below 0.1ppm. Install safety valves and exhaust gas collection systems at the top of the tower to prevent positive pressure overload


Case
Upgrading and Reconstruction of Tangshan Ditch Coal Mine Sewage Station of Shanxi China Coal Comprehensive Utilization Co., Ltd
View Details
Yaotou Inclined Shaft 900000t Resource Integration Mine Water and Domestic Sewage Treatment Project
View Details
Friendship Link
Huapu Environmental Protection Huapu Water Treatment Equipment