Industry
Waste-to-Energy
Application Solution
Customized desulfurization solution using high-specific-surface calcium hydroxide desulfurizer specially designed for flue gas from waste incinerators
Project Outcomes and Core Advantages
This project addresses key industry challenges—complex flue-gas conditions in waste incineration, significant fluctuations in waste composition, and stringent emission controls—by replacing conventional desulfurization materials with a high-specific-surface calcium hydroxide desulfurizer. This approach delivers multiple benefits, including ultra-low emissions, energy savings, extended equipment lifespan, and resource recovery from solid waste, while significantly enhancing overall operational stability and economic efficiency.
1. Ultra-Low, Stable Desulfurization with Compliance Far Exceeding Industry Standards
The solution achieves a stable desulfurization efficiency of over 97%, with sulfur dioxide concentrations at the flue-gas outlet ≤35 mg/Nm³, surpassing both national emission standards and Tianjin’s stringent local regulations. In response to the frequent compositional variations typical of waste-to-energy operations, the system precisely controls outlet SO₂ concentration fluctuations within ±5 mg/Nm³, enabling 24-hour continuous, stable operation and completely eliminating the risk of excessive emissions, thereby ensuring compliant production.
2. Significant Cost and Energy Reductions with Substantially Improved Resource Utilization
The highly active desulfurizer markedly enhances reaction efficiency, substantially reducing material consumption: the dosage per ton of waste is cut from the traditional 18–20 kg down to 6 kg, slashing consumable usage by two-thirds. At the same time, it effectively lowers energy consumption in slurry preparation and material handling processes, while also decreasing the volume of desulfurization residues, comprehensively cutting overall project operating and maintenance costs and helping enterprises achieve refined cost reduction and efficiency gains.
3. Protection of Critical Equipment, Reducing Maintenance and Overhaul Frequency
Precisely controllable desulfurization reactions eliminate the issue of excessive reagent injection, effectively preventing equipment malfunctions such as condensation and corrosion in reaction towers and flue ducts. This provides robust protection for core equipment like spray reactors and baghouse dust collectors, extending their service life, reducing failure rates and downtime-related maintenance costs, and improving the overall operational stability of the flue-gas treatment system.
4. Resource Recovery from By-Products, Enabling a Green, Low-Carbon Closed Loop
The desulfurization reaction is thorough and complete, leaving no more than 5% unreacted calcium hydroxide in the by-products, while significantly increasing the purity of calcium sulfate, which can be directly used in building-material production, soil improvement, and other applications, thus realizing the circular utilization of solid waste resources. Additionally, the process integrates efficiently with activated-carbon adsorption and SCR denitrification technologies, synergistically reducing emissions of dioxins, heavy metals, nitrogen oxides, and other pollutants, comprehensively optimizing flue-gas treatment performance.
