How does the wet electric demister effectively control particulate matter concentration in flue gas?
Publish Time: 2025-08-13
In industrial production processes, especially those involving high-temperature combustion or chemical reactions, such as those in the steel, chemical, and power industries, exhaust gases often contain large amounts of particulate matter, acidic gases, and other pollutants. These pollutants not only affect environmental quality but can also pose a serious threat to human health. As a highly efficient exhaust gas treatment device, the wet electric demister effectively purifies particulate matter from flue gas, reducing its concentration to below 24 mg/m³, achieving standards of no visible smoke and no odor, and meeting strict environmental emission requirements.
1. Optimizing the Spray System Design
The wet electric demister achieves efficient capture and removal of particulate matter through its advanced spray system design. First, the spray system's nozzle layout is carefully designed to ensure uniform droplet distribution, covering the entire exhaust flow area. This uniform distribution not only increases the chance of particulate matter coming into contact with the liquid but also reduces particle escape caused by insufficient localized droplet flow. Furthermore, the spray system's flow rate and pressure can be adjusted according to actual operating conditions to accommodate exhaust gas treatment requirements with varying concentrations and compositions. Secondly, the choice of spray liquid is also crucial. To improve particle capture efficiency, an alkaline solution (such as sodium hydroxide) is typically used as the spray liquid. This not only neutralizes acidic substances in the exhaust gas but also enhances particle agglomeration. When fine particles come into contact with the alkaline solution, a chemical reaction occurs to produce larger particles, facilitating subsequent sedimentation and filtration. Furthermore, the spray liquid can be recycled to reduce water consumption and lower operating costs.
2. Wastewater Treatment and Resource Recovery
Wet electric demisters generate a certain amount of wastewater while treating exhaust gas. To achieve environmental goals and conserve resources, wastewater treatment and resource recovery are key components. Modern wet electric demisters are equipped with a comprehensive wastewater treatment system, including sedimentation tanks, filters, and regeneration units. These facilities effectively separate and remove solid particles and harmful substances from the wastewater, and the treated water can be reused in the spray system, creating a closed-loop management system. Furthermore, for waste gas treatment in specific industries, such as those containing heavy metal ions, wastewater treatment systems can employ technologies such as chemical precipitation or ion exchange resins to convert harmful substances into a more manageable form for centralized disposal or recycling. For example, in the electroplating industry, heavy metal ions in wastewater can be converted into insoluble metal hydroxides through chemical precipitation, which can then be separated into solids and liquids using a filter press, ultimately enabling resource reuse.
3. Intelligent Monitoring and Maintenance Management
To ensure the long-term stable operation and high performance of wet electric demisters, intelligent monitoring and maintenance management systems are crucial. By installing online monitoring equipment such as particulate matter concentration sensors, pH meters, and temperature sensors, key parameters of the equipment's operating status can be acquired in real time. This data is transmitted to a central control system for analysis and processing, enabling timely identification of potential issues and the implementation of appropriate measures.
In summary, the wet electric demister has successfully achieved effective control of particulate matter concentration in flue gas by optimizing spray system design, wastewater treatment and resource recovery, intelligent monitoring and maintenance management, and other measures, reducing the particulate matter concentration to below 24mg/m³, achieving the requirements of no visible smoke and no odor, and meeting strict environmental emission standards.
