Quality appraisal of dust electrocoagulator equipment

dust electrocoagulator is based on the core principle of electrostatic coagulation and charge capture synergy. By optimizing corona efficiency, electric field uniformity and dust cleaning system reliability, it achieves synergy of dust capture efficiency, energy consumption control and emission concentration. It is widely used in the flue gas treatment fields of coal-fired power plants, steel metallurgy, cement production and chemical industries. In ultra-low emission transformation, it is used for efficient removal of PM2.5 and heavy metal aerosols; in high-temperature flue gas scenarios, it meets the insulation stability under 250°C working conditions; in high-humidity environments, it ensures the anti-corrosion performance of the electrode plates. Compared with traditional electrostatic precipitators, dust electrocoagulators have the characteristics of enhanced coalescence of fine particles, anti-corona suppression, and intelligent energy management. They are the core equipment for deep purification of industrial flue gas.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide dust electrocoagulator quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for dust electrocoagulator quality appraisal.

As environmental protection emission standards become stricter, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1. Dispute over performance indicators: Excessive dust concentration at the outlet and failure of anti-corona suppression;

2. Material defects: Insufficient coating thickness of the SPCC steel base material of the dust collection pole plate and poor anti-creepage performance of the insulator;

3, process problems: pole spacing installation deviation >±5mm, high-voltage power supply volt-ampere characteristics imbalance (current density ≤0.1mA/m²);

4, contract performance dispute: core modules (such as high-frequency pulse power supply, sonic cleaning system) do not comply with the technical agreement.

Test items:

Dust removal efficiency, corrosion resistance, antistatic performance, appearance inspection, material analysis

Testing methods:

Dust simulation test, corrosion test, electrostatic test, material composition analysis

A power plant of the applicant signed a "High Frequency Pulse Coagulator Procurement Contract" with an environmental protection company of the respondent, stipulating that dust emission should be ≤5mg/m³. After being put into operation, the measured emission value reached 25mg/m³. The manufacturer argued that it was caused by excessive sulfur content in coal burning.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information, contract technical agreements, on-site investigation case materials and other data of "dust electrocoagulator", and made the following quality analysis opinions:

The tip of the cathode line of the dust coagulator involved in the case was passivated, resulting in a corona current density of only 0.08mA/m² (agreement ≥0.3mA/m²); the plate coating was partially missing (thickness ≤15μm), causing corrosion and perforation; the high-frequency power supply output ripple was >10% (agreement ≤5%), and the electric field energy efficiency dropped by 40%.

The appraisal conclusion concluded that defects in equipment materials and electrical design were the main causes of insufficient efficiency.

Dust electrocoagulator quality appraisal report should include:

1, appraisal purpose and reference standards;

2, involved specifications, production batch number, construction record;

3, detection method and equipment list;

4, test data and failure correlation analysis;