Electrostatic precipitator quality appraisal

electrostatic precipitator is an essential supporting equipment for thermal power plants. Its function is to remove particulate smoke and dust in the flue gas discharged from coal-fired or oil-fired boilers, thereby greatly reducing the amount of smoke and dust discharged into the atmosphere. This is an important environmental protection equipment to improve environmental pollution and improve air quality. The working principle of
electrostatic precipitator is based on the principle of "electric screening". When the airflow in the dust collector passes through the metal electrodes carrying electric charges, the dust particles will be affected by the electric charge force and be charged with positive and negative charges respectively, thus generating a charge force. Under the force of electric charge, the dust is adsorbed on the charged electrode, and the purified gas is discharged.
In the case of electrostatic precipitator quality appraisal, Zhongke Testing can provide electrostatic precipitator quality appraisal services.

At present, common domestic electrostatic precipitators are divided into vertical and horizontal types according to the direction of air flow. They are divided into plate type and tube type according to the type of precipitation electrode. According to the method of removing dust on the precipitation electrode plate, they are divided into dry wet type, rotary umbrella type high-efficiency electrostatic precipitator and high-voltage electrostatic precipitator specially designed for machine.
Bag dust collector types are mostly named according to the dust cleaning method, and are mainly divided into three types: mechanical vibration bag dust collector, atmospheric backflush type bag dust collector and pulse injection bag dust collector.

JB/T 6407-2007 Electrostatic precipitator design, commissioning, operation and maintenance safety technical specifications
GB/T 40514-2021 Electrostatic precipitator
GB/T 13931-2017 Electrostatic precipitator performance test method
GB/T 40505-2021 Wet electrostatic precipitator Performance test method
GB/T 33017.2-2016 Technical requirements for evaluation of high-efficiency air pollutant control equipment Part 2: Electrostatic precipitator
JC/T 358-2021 Electrostatic precipitator for cement industry
JB/T 13556-2018 Tubular wet electrostatic precipitator
JB/T 13415-2018 Wet electrostatic precipitator Installation technical specifications
DL/T 5760-2018 Electrostatic precipitator construction technology guidelines
DL/T 514-2017 Electrostatic precipitator
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quality product dispute situation:
According to the situation reported by the client and the information provided, the client signed a "Renovation Project Contract" with a machinery company (hereinafter referred to as the supplier), and the supplier carried out radial transformation of the 2*330MW unit #2 electrostatic precipitator of the demander's power plant. After the renovation, the client discovered that the "electrostatic precipitator" unit involved had problems with the rotating electrodes getting stuck on the north and south sides one after another, and it could not be used normally for a long time. One and a half years after the second transformation, the platform of the "electrostatic precipitator" unit involved collapsed and the reducer chain broke.
In order to further clarify the cause of the failure of the "electrostatic precipitator" unit involved, the client applied to identify the cause of the dust accumulation failure of the disputed "electrostatic precipitator" and the cause of the rotating electrode jamming and shutdown failure.
quality analysis results:
appraisers discussed and comprehensively technical analyzed the relevant information, on-site inspections and test data involved in the case, and made the following suggestions and conclusions: The main reason for the ash accumulation failure of the ash hopper of the "electrostatic precipitator" unit involved in
was the unscientific design of the ash hopper structure and ash conveying system. The ash hopper of the "electrostatic precipitator" unit involved in
was severely dusted and hardened. The dust buried the frame mesh, causing the mesh chain to run with excessive resistance. Then the mesh frame tilted, deformed and got stuck. Eventually, the chain broke, which was the main reason for the rotating electrode jamming and outage failure.