Overseas industrial factories often face the dilemma of "single equipment is difficult to balance" when dealing with complex flue gas mixtures of high temperature, high dust, and fine powder. Electrostatic precipitators have insufficient capture of submicron fine powder, and bag filters are prone to aging under high temperature and high humidity conditions. The "bag+electrostatic collaborative dust removal solution" combines "electrostatic pre dust removal+bag fine filtration" to withstand harsh working conditions and reduce dust emission concentration to below 5mg/m ³, perfectly adapting to heavy industry foreign trade scenarios such as steel, power plants, cement, etc., becoming a "compliant choice" under complex working conditions.
1、 Collaborative core logic: first coarse and then fine, complementing weaknesses
The synergy between cloth bags and static electricity is not simply a combination, but is designed according to the logic of "dust particle size classification treatment", maximizing the advantages of both:
1. Electrostatic precipitator: pre coarse dust removal to reduce bag load
The dusty flue gas first enters the electrostatic precipitator, which utilizes the principle of electric field adsorption to efficiently capture over 80% of coarse dust particles larger than 10 μ m. This step can significantly reduce the dust concentration of subsequent bag filters, avoid rapid clogging of filter bags, extend the replacement cycle of filter bags from 6 months to 12-18 months, and reduce operation and maintenance costs.
2. Bag filter: post fine filtration, locking fine powder to meet standards
After electrostatic pretreatment, the flue gas enters the bag filter, where the filter bag accurately captures fine powder of 0.1-10 μ m, and the final emission concentration remains stable at ≤ 5mg/m ³, easily passing strict standards such as EU EN 13285 and US EPA Title V. At the same time, due to the pre-treatment that removes coarse dust, the frequency of bag cleaning is reduced by 50%, and the energy consumption of the fan is saved by 20%.
3. System linkage control: intelligent adaptation to changes in working conditions
Equipped with PLC intelligent control system, real-time monitoring of flue gas temperature, dust concentration, equipment resistance and other parameters: when the flue gas temperature suddenly rises, the electric field voltage of the electrostatic precipitator is automatically adjusted to avoid high temperature damage to the bag; When the dust concentration exceeds the standard, immediately increase the frequency of bag cleaning to ensure full compliance without manual intervention.
2、 Key applicable industries: solving the problem of dust removal in heavy industry
The collaborative solution's "resistance to harsh working conditions+efficient compliance" characteristics are particularly suitable for the complex needs of overseas heavy industries. Typical application scenarios are as follows:
1. Treatment of converter/blast furnace flue gas in steel plants
The flue gas temperature of steel plants can reach 300-400 ℃, containing a large amount of coarse iron oxide dust and fine sulfide powder. Pre treatment of coarse dust and high-temperature flue gas by electrostatic precipitator to avoid burning the bag due to high temperature; The bag is used for post filtration of fine powder, with an emission concentration of ≤ 10mg/m ³, which meets the EU steel industry environmental standards and reduces the corrosion of equipment by sulfides.
2. Boiler flue gas treatment in coal-fired power plants
The flue gas from power plants contains high humidity and dust, with fine powder accounting for 30%. The electrostatic precipitator first removes 70% of the coarse dust to reduce the humidity load on the bag; The bag uses PPS filter bags with a temperature resistance of 180 ℃ to accurately capture fine powder, solving the problem of insufficient fine powder capture rate in traditional electrostatic precipitators and helping power plants achieve ultra-low emission transformation.
3. Cement kiln tail gas treatment
The exhaust gas from cement kilns contains high concentrations of alkaline dust and is accompanied by the risk of condensation. Pre treatment of coarse dust with electrostatic precipitator to reduce the erosion of alkaline dust on the bag; The bag adopts anti condensation film filter material to avoid dust agglomeration and blockage, ensuring long-term stable operation of the equipment and adapting to high-temperature and high dust cement production scenarios in the Middle East, Africa, and other regions.
3、 Foreign trade adaptation: tailored to global working conditions, easier to implement
Based on the differences in working conditions and compliance requirements in different regions overseas, the collaborative plan can be customized and adjusted to ensure adaptability
1. Full coverage of compliance certification
The entire system has passed CE and ATEX explosion-proof certifications. The bag filter material complies with the EU REACH regulation, and the electrode material of the electrostatic precipitator meets the indirect contact standards of the US FDA. No additional testing is required for exports to Europe, America, Southeast Asia, and other regions, resulting in a 50% increase in customs clearance efficiency.
2. Customized optimization of regional working conditions
Middle East high temperature zone: Install insulation layer on the electrodes of electrostatic precipitators, and use PTFE filter material that can withstand 260 ℃ for the bag to avoid equipment failure caused by high temperature;
Nordic high humidity area: Install a dehumidification module at the system inlet, and equip the insulation porcelain bottle of the electrostatic precipitator with a heating sleeve to prevent condensation and short circuit;
3. Data management adapted to ESG needs
The system is equipped with data monitoring modules for dust concentration, energy consumption, and cleaning frequency, which can be uploaded in real-time to the factory MES system or third-party ESG platform. Overseas enterprises can obtain key operational data of dust removal systems without additional investment, easily complete ESG reports, and enhance brand competitiveness in the international market.
For overseas heavy industry enterprises, the value of the "bag+electrostatic collaborative dust removal solution" lies in "1+1>2". It not only uses electrostatic precipitators to withstand the "hard working conditions" of high temperature and high dust, but also relies on bag scrubbers to maintain the "bottom line" of fine powder compliance, while significantly reducing operation and maintenance costs and compliance risks. In the trend of increasingly stringent global environmental standards, this solution has become the preferred choice for industries such as steel, power plants, and cement to break through dust removal bottlenecks and achieve green production, helping foreign trade enterprises establish a foothold in the international market.