EN
As the coal chemical industry enters a critical phase of green transformation, the selection of flue gas desulfurization and denitrification technologies has become a decisive factor influencing environmental performance, operating costs, and long-term sustainability. Among various technical routes, ammonia-based desulfurization (ammonia FGD) is increasingly recognized as a highly effective solution for coal chemical enterprises aiming to achieve ultra-low emissions while advancing resource recycling.
With continuous technological innovation and seven major process upgrades, MirShine Environmental has successfully overcome long-standing industry challenges such as ammonia slip and aerosol formation. This breakthrough has significantly enhanced the applicability, reliability, and economic feasibility of ammonia-based desulfurization, providing coal chemical enterprises with a solution that balances environmental compliance and commercial value.
Stable Ammonia Supply and Process Synergy
One of the most compelling advantages of ammonia-based desulfurization in coal chemical plants lies in the availability of on-site ammonia resources. During coal chemical production, ammonia gas or ammonia water is often generated as a byproduct, forming a stable and economical absorbent source for flue gas treatment.
By adopting ammonia-based FGD, enterprises can effectively implement a “waste-to-control-waste” strategy, utilizing internal ammonia streams to remove sulfur dioxide from flue gas. This approach significantly reduces dependence on externally purchased reagents, lowers transportation and storage costs, and simplifies overall material management.
MirShine Environmental’s advanced ammonia desulfurization technology integrates precise ammonia dosing control with a multi-stage spray absorption structure, ensuring efficient and stable reactions between ammonia and sulfur-containing pollutants. As a result, SO₂ emissions can be consistently controlled below 30 mg/Nm³, while creating favorable flue gas conditions for downstream denitrification systems. This integrated design enhances overall system coordination and improves total emission control efficiency.
Outstanding Energy Efficiency and Reduced Operating Costs
Compared with traditional calcium-based desulfurization processes, ammonia-based desulfurization features higher chemical reactivity and faster absorption kinetics, allowing operation at a lower liquid-to-gas ratio. This directly reduces the power consumption of key equipment such as circulation pumps.
Optimized system resistance design further decreases induced draft fan energy demand. In addition, the ammonia-SO₂ reaction is exothermic, making partial heat recovery possible and reducing overall thermal losses.
Through process integration and intelligent control optimization, MirShine Environmental has achieved industry-leading energy performance indicators, enabling coal chemical enterprises to realize substantial energy savings and long-term operational cost reductions throughout the system lifecycle.
Multi-Pollutant Synergistic Control Capability
Modern ammonia-based desulfurization systems have evolved beyond single-function sulfur removal. Advanced solutions developed by MirShine Environmental enable simultaneous removal of multiple pollutants, including sulfur trioxide (SO₃), mercury and other heavy metals, as well as fine particulate matter such as PM2.5.
A key technological highlight is the proprietary mist elimination and aerosol control system, which has been comprehensively optimized through seven generations of upgrades. This innovation effectively eliminates ammonium salt aerosol emissions and visible white plume issues, achieving truly “clear stack” performance under all operating conditions.
By integrating multi-pollutant control into a single system, coal chemical enterprises can meet increasingly stringent composite emission standards with lower overall equipment investment and reduced system complexity.
Byproduct Utilization and Economic Value Creation
A distinctive strength of ammonia-based desulfurization is its ability to convert pollutants into valuable byproducts. Sulfur dioxide absorbed by ammonia ultimately forms ammonium sulfate, which can be further processed through concentration, crystallization, and drying to produce commercial-grade fertilizer.
This transformation not only enables sulfur resource recovery but also aligns closely with circular economy principles. Instead of being a pure environmental cost, desulfurization becomes a value-generating process.
MirShine Environmental has developed mature ammonium sulfate crystallization and drying technologies that ensure stable product quality and high purity. The resulting ammonium sulfate meets agricultural-grade standards, providing coal chemical enterprises with a reliable additional revenue stream that effectively offsets environmental operating expenses.
Proven Performance Through Industrial Application
Practical performance is the ultimate measure of technology reliability. In a coal chemical project implemented for Fujian Yongrong Holding Group, MirShine Environmental’s ammonia-based desulfurization system has delivered consistent, long-term results.
Operational data show:
Desulfurization efficiency consistently above 99.2%
SO₂ outlet concentrations far below national ultra-low emission limits
Average ammonia slip maintained at 1.15 mg/Nm³, with peak values well below regulatory thresholds
Complete elimination of visible plume phenomena
Approximately 20% reduction in power consumption compared with conventional systems
Furthermore, the produced ammonium sulfate meets GB 535-1995 premium-grade fertilizer standards, generating significant environmental and economic benefits. This project demonstrates the optimal balance of efficiency, reliability, and profitability achievable with MirShine’s ammonia-based desulfurization technology.
A Strategic Choice for Coal Chemical Enterprises
For coal chemical enterprises with stable ammonia sources and a strategic focus on resource recycling and cost efficiency, ammonia-based desulfurization represents a highly viable and forward-looking solution.
By fundamentally resolving historical issues such as ammonia slip and aerosol emissions through continuous innovation, MirShine Environmental has established a comprehensive advantage in energy efficiency, multi-pollutant control, and byproduct utilization. This technology route is not merely a means of regulatory compliance, but a powerful driver supporting the coal chemical industry’s transition toward cleaner, more efficient, and lower-carbon development.