Conclusions first | Empirical evidence
After upgrading to a chamber diaphragm filter press with a filter plate size of φ800 × 800 mm and a filter chamber volume of 0.8 m³ in a municipal sludge treatment project in East China, the moisture content of the filter cake dropped by up to 43%, the daily processing capacity increased from 14 tons to 20 tons, the annual cost of pharmaceuticals was saved by 150,000 yuan, and the energy consumption was reduced by 18% (on-site monitoring data in 2024). This secondary extrusion process of “dehydration first, then pressing” is the key to the leading dehydration efficiency of the diaphragm filter press.
Core advantages and technical principles
- Secondary extrusion to improve the dehydration rate.
The traditional filter press stops dehydration after the filter cake is formed, while the diaphragm filter press compresses the filter cake again for 3-5 minutes through a back pressure of 0.3-0.6 MPa, and the moisture content of the filter cake can be reduced to below 35%. - Intelligent control, energy saving and consumption reduction
. The integrated PLC+touch screen system can adjust the pressure supply sequence and time in real time, improve the strength of the filter cake, and reduce repeated cleaning. The variable frequency feeding and steam heating options can minimize power consumption.
Typical parameters can be flexibly customized
Filter plate size: Φ800 mm×Φ800 mm (standard); Φ1000 mm×Φ1000 mm (large capacity)
Filter chamber volume: 0.6–1.2 m³, can be customized according to the project
Working pressure: 1.6–2.5 MPa; diaphragm back pressure: 0.3–0.6 MPa
Filter cake thickness: 10–20 mm, sludge discharge efficiency ≥98%
Application scenarios and benefits
Printing and dyeing wastewater decolorization: After use in a printing and dyeing factory in Jiangsu, the moisture content of the filter cake dropped from 65% to 38%, and the dye recovery rate increased by 12%;
Metallurgical tailings solidification: A mine in Hebei processes 50 tons of tailings per day, and the moisture content of the filter cake is controlled at 36%, and the annual storage cost is reduced by 20%;
Biopharmaceutical concentration: The recovery rate reaches 98%, and the impurities are reduced by 0.5%, becoming the first choice for many state-owned enterprises.
Maintenance and safety
Filter cloth replacement: 3-6 months/time; diaphragm life is about 2000 cycles
Safety protection: equipped with overpressure relief valve and emergency power-off device
Cleaning options: Optional filter cake cleaning chamber to meet high purity requirements
Meet foreign trade needs: The above parameters and cases not only demonstrate technical advantages, but also meet customers’ dual needs for cost and efficiency, and are ideal for purchasing environmental protection equipment.
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