Coking Industry Treatment Solutions

• Characteristics of waste gas: the waste gas contains ammonia, hydrogen sulfide and sulfur dioxide, and the concentration of waste gas is relatively stable. The rear end is required according to needs conduct desulfurization and denitration treatment
• Source of waste gas: waste gas from desulfurization section, waste gas from ammonium sulfate section and waste gas from salt extraction section
• Waste gas components: ammonia, hydrogen sulfide, sulfur dioxide, nitrogen oxides, particulate matter and VOCs
• Process scheme: pretreatment + RTO + (optional SCR + desulfurization)

To effectively manage and treat waste gas from coking operations, a multi-stage treatment system is proposed:

1. Pretreatment: The initial phase involves conditioning the waste gas by removing large particulates and adjusting temperature and humidity. This ensures optimal operating conditions for downstream processes and improves overall treatment efficiency.
2. Regenerative Thermal Oxidation (RTO): As the core degradation step, the waste gas is heated to temperatures ranging from 760°C to 870°C, oxidizing organic pollutants into carbon dioxide (CO₂) and water vapor (H₂O). This process effectively destroys VOCs and other organic emissions.
3. Targeted Post-Treatment: Depending on regulatory and operational requirements, additional processes such as Selective Catalytic Reduction (SCR) may be incorporated to reduce NOx emissions using ammonia or urea, followed by desulfurization to remove sulfur compounds via reagents such as limestone. These steps enhance compliance with stringent emission standards.

By adopting this integrated treatment approach, the coking industry can achieve significant reductions in emissions, ensuring environmental compliance and minimizing ecological impact.

The thermal storage oxidation boiler “stores” the heat generated during the combustion of exhaust gas and then outputs it as high-temperature flue gas. Its heat conversion efficiency reaches as high as 99%, and its overall thermal efficiency exceeds 97%, enabling efficient recycling of the heat energy carried by the exhaust gas.

To tackle the high degree of coupling among system parameters, we have designed a multi-constraint real-time optimization control program to keep the entire system operating safely and efficiently. Each system also undergoes condition-specific HAZOP analysis to ensure safety, reliability, and fail-safe operation.