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The diaphragm filter press is a highly efficient and versatile equipment used in solid-liquid separation processes. It offers high pressing pressure, excellent corrosion resistance, and adaptability to various materials. The new generation of diaphragm filter presses can be classified into two main types: rubber diaphragms and PP (polypropylene) integral diaphragms. Each type has its own advantages depending on the application.
The rubber diaphragm filter press is ideal for handling weak acids, weak bases, and non-organic solvent materials. It provides sufficient membrane expansion with relatively low pressure and gas volume, which helps reduce energy consumption. On the other hand, the PP diaphragm is suitable for more aggressive environments such as strong acids, alkalis, and organic solvents. It offers better performance, longer service life, and is commonly used in industrial applications where durability is essential.
These filter presses can operate using either gas (air or inert gas) or liquid (water or oil) as the pressing medium, making them adaptable to different industries. They can also be configured with food-grade or standard components based on customer requirements. Additionally, they support PLC control systems and human-machine interfaces, offering greater automation and ease of operation.
For general materials, the diaphragm can be pressed within 3 to 15 minutes, ensuring optimal dewatering efficiency. For special materials, a stepwise pressing method—starting with low pressure and then increasing to high pressure—can be applied to enhance performance. The diaphragm filter plates are designed for high-efficiency dehydration, ensuring the best filtration results and significantly reducing moisture content in the filter cake.
At the end of the feeding process, the diaphragm filter press applies pressure to the filter cake, improving overall dewatering efficiency, increasing dryness, and reducing pollution and labor. In some cases, the drying stage can even be eliminated. Adding a blowing operation before and after pressing further reduces moisture content.
Key benefits of the diaphragm filter press include:
1. Low-pressure filtration combined with high-pressure pressing, which shortens the entire filtration cycle.
2. Using TPE elastomers, the maximum filtration pressure can reach up to 25MPa, significantly reducing water content and saving drying costs.
3. Reduced power consumption during the later stages of filtration when flow rate is low but pressure is high.
4. Quick pressing process that saves energy and improves efficiency.
5. Increased density of the filter cake by rearranging its structure under pressure, resulting in higher dryness.
6. Strong corrosion resistance, suitable for a wide range of solid-liquid separation tasks.
7. Configurable with PLC and HMI for enhanced control and flexibility.
8. Diaphragm filter plates feature anti-fatigue, anti-aging properties, and excellent sealing performance.
The working principle of the Zhangzhou Donglong Diaphragm Filter Press enhances the processing capacity and operational flexibility, especially in mud cake cleaning operations.
The diaphragm filter press operates through several key steps:
1. **Positive Pressure Dewatering**: Under strong mechanical force, multiple filter plates are arranged closely, forming a filter chamber. The slurry is pushed into the chamber under positive pressure, allowing solid particles to be trapped by the filter medium while the liquid is filtered out.
2. **Extrusion Dewatering**: A rubber diaphragm is used to apply additional pressure to the filter cake, helping to remove more moisture from the cake.
3. **Blow-off Dehydration**: Compressed air is introduced to one side of the cake, carrying moisture out through the filter cloth on the opposite side, further reducing moisture content.
4. **Cake Discharge**: After dewatering, the pressing force is released, and the filter plates are opened individually to unload the cake.
Depending on the material being processed, the diaphragm filter press can be set up for slurry dewatering, extrusion dewatering, blow-off dehydration, or single/double side dehydration to achieve the lowest possible moisture content in the final product.
Contact Mr. Wu at 13760177211 or email: @163.com
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