Quality identification of dehydration equipment

dehydration equipment takes the synergy of mechanical separation and high-efficiency filtration as its core principle. By optimizing centrifugal force, filter belt tensioning accuracy and energy consumption control, it achieves synergy of solid-liquid separation efficiency, processing capacity and operational stability. It is widely used in sewage treatment, mine tailings, food processing, chemical sludge and other fields. In municipal sludge treatment, it is used for continuous dehydration of belt filter presses; in the mining field, it meets the energy-saving dehydration needs of tailings dry piles; in the food industry, it ensures the efficient extraction of starch or protein. Compared with traditional equipment, dehydrators have the characteristics of high degree of automation, strong corrosion resistance and low maintenance costs. They are the core equipment for solid waste reduction and resource utilization.

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

With the improvement of environmental protection and resource utilization requirements, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: the processing capacity does not meet the standard, and the solid content of the mud is insufficient;

2, material defects: the tensile strength of the filter belt is insufficient, and the stainless steel parts are Cl⁻ stress corrosion;

3, process problems: centrifuge drum dynamic balance deviation, insufficient water pressure for filter cloth flushing;

4, contract performance dispute: core configuration (such as imported bearing brand, high-pressure pump power) does not match the technical agreement.

Dehydration equipment litigation quality appraisal mainly includes the following technical methods:

1. Appearance inspection: Conduct a comprehensive appearance inspection of the equipment, including appearance dimensions, structural strength, surface treatment and completeness of parts.

2. Performance test: Under standard test conditions, the equipment is tested for dehydration performance, including dehydration rate, dehydration efficiency, energy consumption and other indicators.

3. Material analysis: Conduct material analysis on key parts of the equipment, including chemical composition, mechanical properties and corrosion resistance.

4. Process verification: Check whether the equipment manufacturing process complies with relevant standards and specifications, including welding quality, assembly accuracy and surface treatment, etc.

A sewage treatment plant of the applicant signed a "Belt Filter Press Purchase Contract" with an equipment manufacturer of the respondent, and it was agreed that the solid content of the mud should be ≥ 25%. After being put into operation, the solid content was only 18%. The manufacturer argued that it was caused by changes in the properties of the sludge.

identification analysis results:

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

The water permeability of the filter belt of the dehydration equipment involved in the case is only 50L/m²·s (agreement ≥100L/m²·s), the longitudinal tensile strength is 600N/cm (agreement ≥800N/cm); the pressure in the rolling area is only 0.4MPa (agreement ≥0.6MPa), and the sensitivity deviation of the correction sensor is >±10mm.

The appraisal conclusion determined that defects in materials and control systems were the main causes of dehydration failure.

Dehydration equipment quality appraisal report should include:

1, purpose of appraisal (such as attribution of performance disputes, environmental compliance verification) and cited standards;

2, equipment model involved, design parameters, operation logs;

3, testing methods and equipment list (such as Solid content rate detector, vibration analyzer);

4, correlation analysis between test data and failure (such as the impact of filter belt performance on solid content rate);