At the invitation of the China Petroleum and Chemical Survey and Design Association, ZHGAS participated in the 2019 Technical Exchange Conference of the National Synthetic Ammonia Design Technology Center.

Industry Context: Challenges of Fixed-Bed Gasification

The fixed-bed intermittent gasification technology, once a cornerstone of China’s small-scale nitrogen fertilizer industry, now faces intense scrutiny due to its environmental drawbacks. Complex wastewater composition, persistent odors, and high treatment costs have plagued operators for decades. With the implementation of national policies like the Three-Year Action Plan for “Winning the Blue Sky Defense Campaign,” upgrading or replacing fixed-bed gasifiers has become an urgent industry priority.

ZHGAS’s Solution: CGAS Technology

During the conference, ZHGAS engaged with manufacturers on environmental retrofits and technological alternatives for fixed bed gasifier. The company advocates source control through its proprietary CGAS (Circulating Fluidized Bed Gasification) technology, which minimizes pollutant emissions from the outset and ensures precise process control. Compared to piecemeal end-of-pipe solutions, CGAS offers a once for all resolution to environmental challenges while delivering:

Broad coal adaptability (low-rank coal, high-ash/sulfur/moisture coal);

High reliability and low operational costs;

Flexible load adjustment and superior energy efficiency;

Ultra-low emissions (waste gas, water, residue).

Outcome & Impact

Through this technical exchange meeting, manufacturers expressed strong interest in CGAS technology, recognizing its potential to reduce production costs, enhance competitiveness, and align with national sustainability goals.