Use filter press membrane plates to achieve efficient solid-liquid separation

Core conclusion

The application of rubber diaphragm filter plates and polypropylene diaphragm filter plates can achieve efficient solid-liquid separation in high temperature, high pressure and strong chemical environments. On-site verification by a printing and dyeing factory in Jiangsu: After upgrading the rubber diaphragm, the moisture content of the filter cake dropped by up to 43%, saving an average of 200,000 yuan in annual processing costs.

1. Principle of innovative technology

1. Conclusion of the first paragraph
Through the diaphragm expansion secondary pressing process, the solid content of the filter cake can be increased to 30% at most, and the dehydration efficiency can be improved by nearly 30%.

2. Process reconstruction
– Inlet pretreatment: the raw material slurry is deposited at the front end of the filter cloth, and the suspended solids are retained;
– Secondary expansion and pressing: the diaphragm expands under the action of 0.6-0.8 MPa air pressure, continuously pressurizing the filter cake;
– Automatic cake unloading: cooperate with mechanical vibration or backwashing to ensure that the filter cake is completely detached, and the production cycle is increased by about 25%.

3. Technical advantages
– Continuous squeezing avoids “cake blocking” phenomenon;
– Efficient dehydration reduces subsequent drying energy consumption;
– Fully automatic unloading simplifies manual operation.

2. Comparison of filter plate materials

3. Typical application cases

1. Municipal sludge treatment
– the water content of sludge is reduced to ≤45%, and the daily processing capacity is increased by 20%;
– Annual savings of 300,000 yuan in chemical costs.

2. Ore dressing tailings recovery
– Solid recovery rate reaches 98%, and filter cake dryness increases by 15%;
– Combined with ultrasonic pretreatment, the polymer (EPS) degradation rate increases by 35%.

3. Food and pharmaceutical industry
– The combination of filter cloth and filter plate achieves “zero secondary pollution”;
– The annual production capacity of the production line is increased by 10%, and the compliance meets GMP requirements.

4. Model selection and economic benefits

1. Key points for selection
– Material characteristics: solid content, corrosiveness, temperature range;
– Capacity requirements: continuous/intermittent mode, degree of automation;
– Maintenance costs: filter cloth replacement cycle, durability of wearing parts.

2. Economic evaluation
– Payback period of 1-2 years;
– Annual energy saving of 15% and reduction of labor costs by 12%;
– Comprehensive rate of return of more than 25%.