Working principle and transformation characteristics of electric bag composite dust collector in Hebei Power Plant
HebeiThe Phase I 2 Yi 600MW subcritical steam turbine generator unit of the power plant originally implemented the air pollutant emission standard for thermal power plants (GB 13223-2003), and its smoke and dust emissions were controlled at 50mg/m3, which no longer meets the requirements of the new standard. In order to meet the requirements for smoke and dust emissions, our company has carried out dust removal for the 2 Yi 600MW coal-fired unit in the first phase of Hebei Power PlantElectric bag composite dust collectorTransform and improve its emission efficiency to meet special emission limits.
Hebei Power PlantWorking principle of electric bag composite dust collector
Electric bag composite dust collectorIt is a new and highly efficient dust collector that combines electrostatic precipitator and bag filter. Especially suitable for high ash concentration flue gas dust removal and meeting the requirements of current national emission standards. The electric bag composite dust collector consists of two units, namely the electric dust removal unit and the bag dust removal unit. Generally, an electric field is arranged for the electrostatic precipitator unit. This type of electric bag composite dust collector has a front electric bag and a rear electric bag, which not only enables the electric dust collector to collect 80% to 90% of the dust in the flue gas, but also greatly reduces the concentration entering the filter bag, reduces the resistance of the filter bag, and increases the cleaning cycle, thereby extending the life of the bag. It also utilizes the advantages of the bag filter, such as insensitivity to coal types and high collection efficiency of fine dust (over 99.9%), to ensure emission standards of 50mg/m3 or even less than 20mg/Nm3.
HebeiPower plant electric bag composite dust collectorCharacteristics of
1. The efficiency of the electric bag filter is not affected by high specific resistance fine dust, coal type, or ash characteristics. The emission concentration can easily reach 50mg/Nm3 or below, and is stable for a long time.
2. Widely applicable, with high efficiency and stability in dust removal efficiency. The dust removal efficiency of this equipment is not affected by high specific resistance fine dust, coal type, or ash characteristics. The emission concentration is easily achievable below 20mg/m3 and remains stable for a long time.
3. Save operating costs. The operating resistance is 500Pa lower than that of a pure bag filter, and the power of the induced draft fan can be reduced by 1.74KW per 10000m3/h.
4. Long cleaning cycle, low energy consumption of gas source, and long service life of filter bag. Compared with pure bag filters, the dust collected by the dust filter bag is only 1/4 of its inlet, the cleaning cycle is more than twice as long, the compressed air consumption is less than 1/3, and the service life of the filter bag can be extended by 2-3 years.
5. Compact structure, small footprint, especially suitable for the efficiency improvement of old electrostatic precipitators.The advantages of electric bag composite dust collectors are significant, as they can utilize the original shell of the electrostatic precipitator without increasing land occupation or requiring high maintenance costs like bag filters. Please follow our company website for more information http://www.btshhb.com
