Hanqi Environment has recently won the bid for and successfully completed the technical retrofit of the ozone catalytic oxidation tank at Zhong'an United Coal Chemical Co., Ltd. This upgrade employs Hanqi's proprietary patented ozone fluidized bed technology, effectively overcoming long-standing issues in traditional fixed-bed processes, such as catalyst deactivation, bed clogging, and low ozone utilization—which lead to reduced system efficiency and high maintenance costs. The solution ensures stable effluent quality while delivering significant operational cost savings.

Targeting Pain Points with Innovation, Boosting Efficiency with Process Upgrades

In high-salinity brine and refractory wastewater treatment within coal chemicals, petrochemicals, and related industries, conventional ozone catalytic oxidation often faces bottlenecks: fixed catalyst beds tend to clog, require regular replacement, and generate hazardous waste; poor ozone mass transfer and low utilization drive up operating costs and may cause odor issues on site. This retrofit upgrades the original process to an ozone fluidized bed system.

The new design moves away from fixed-media reliance. Through a carefully engineered internal fluidization structure, it harnesses the kinetic energy of ozone gas itself as a driving force. Using density differentials, it alters the internal flow regime and creates a large-scale hydraulic circulation within the tank. This greatly extends the gas-liquid contact path, multiplies the circulating flow, distributes ozone more evenly, and significantly improves mass transfer efficiency while reducing reaction time. As a result, efficient oxidative degradation of pollutants is achieved without relying on solid catalysts—fundamentally avoiding clogging, deactivation, and performance decay.

Clear Operating Cost Comparison & Notable Economic Benefits

The process upgrade delivers direct and quantifiable economic gains, primarily through fundamental optimization of traditional maintenance operations:

The ozone fluidized bed technology has been validated in multiple industrial wastewater treatment applications across China. This project at Zhong'an United follows successful implementations at Sinopec Hunan Petrochemical and Sinopec Qingdao Refining & Chemical. In each case, it resolved poor performance and catalyst deactivation in existing ozone units, achieving stable efficiency gains within limited tank volumes while maintaining a work-friendly environment.

The successful commissioning of this project further demonstrates that the technology is especially suitable for in-situ retrofitting of existing ozone treatment units. It allows for a leap in both treatment performance and operational economy without altering the main tank structure, and can be executed during scheduled maintenance windows. For coal chemical, petrochemical, and similar industries, it offers a proven, reliable technical pathway to reduce energy consumption, lower costs, and maintain stable compliance in existing wastewater treatment facilities.