Quality appraisal of marine environmental protection equipment

marine environmental protection equipment is based on the core principle of synergy between pollutant emission reduction and efficient energy utilization. By optimizing desulfurization and denitrification efficiency, oil-water separation accuracy and exhaust gas scrubbing system reliability, it achieves ship emission compliance, marine environmental protection and energy consumption control. It is widely used in fields such as ocean-going cargo ships, cruise ships, engineering ships and offshore platforms. In the desulfurization and denitrification system, it is used to purify exhaust gas after heavy oil combustion; in the field of ballast water treatment, it meets the sterilization needs for biological invasion prevention and control; in oil sewage treatment, it ensures that oily wastewater reaches the standard discharge. Compared with land-based equipment, marine environmental protection equipment has the characteristics of resistance to salt spray corrosion, resistance to vibration and impact, and compact space. It is the core equipment of green shipping.

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

As IMO environmental protection regulations become stricter, related quality dispute cases have increased significantly. The focus of judicial disputes is:

1. Disputes over performance indicators: SOx concentration at the outlet of the desulfurization tower exceeds the standard and the sterilization rate of ballast water is insufficient;

2. Material defects: FRP lamination strength of the scrubber tower, 316L stainless steel Cl⁻ stress corrosion Corrosion and cracking;

3. Process issues: SCR catalyst activity decay rate, oil-water separation membrane flux;

4. Contract performance disputes: key modules (such as exhaust gas recirculation EGR system, ultraviolet disinfection module) are inconsistent with the technical agreement.

Litigation quality appraisal of marine environmental protection equipment usually involves the following technical methods:

1. On-site inspection: The appraiser goes to the equipment installation site to investigate the installation status, operating status, external defects, etc. of the equipment.

2. Performance test: Use professional instruments to test the performance indicators of the equipment (such as desulfurization efficiency, denitrification rate, etc.).

3. Material analysis: Conduct material analysis on key components of the equipment (such as filter materials, adsorbents, etc.) to verify whether they meet the quality standards.

4. Document review: Review the design drawings, technical parameters, acceptance documents, etc. of the equipment to verify whether the quality management system of the equipment is complete.

The applicant, a shipping company, and the defendant, an equipment manufacturer, signed an "Open Desulfurization Tower Procurement Contract", stipulating that SOx emissions should be ≤0.1%. During operation, the SOx concentration was detected at the port at 0.8%. The manufacturer argued that it was caused by the excessive sulfur content in the fuel oil.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "Marine Environmental Protection Equipment", contract technical agreements, on-site inspection case materials and other data, and made the following quality analysis opinions:

The atomization particle size of the desulfurization tower nozzle of the marine environmental protection equipment involved in the case was >200 μm (agreed ≤50 μm), resulting in a 40% decrease in gas-liquid contact efficiency; the impeller of the wash water circulation pump was corroded and thinned by 30%, and the flow rate was 70% less than the agreed value; the Cl⁻ content of the 316L stainless steel flange exceeded the standard (>50ppm), and intergranular corrosion cracks expanded.

The appraisal conclusion determined that equipment design and material defects were the main reasons for excessive emissions.

Marine environmental protection equipment quality appraisal report should include:

1, purpose of appraisal (such as emission compliance disputes, material failure attribution) and cited standards (IMO MEPC.259(68), GB/T 17826, etc.);

2, equipment model involved, classification society certificate, operation log;

3, detection method and equipment list (such as exhaust gas analyzer, salt spray box);

4, analysis of the correlation between test data and failure (such as the impact of atomized particle size on desulfurization efficiency);