Reasons and Measures for Excessive Feed Pressure of Filter Press

Reasons and Measures for Excessive Feed Pressure of Filter Press

The filter press is a commonly used solid-liquid separation equipment used to separate suspended solid particles from liquids. During operation, the feed pressure may be too high. This article will discuss the causes, hazards, and solutions to the high feed pressure of the filter press.

Reasons for High Feed Pressure

• The feed flow rate is too high: If it exceeds the capacity of the filter press, the equipment will experience excessive pressure, leading to an increase in feed pressure.
• Excessive particulate materials: When the feed contains a large number of particulate materials, these particulate materials will block the pores of the filter medium, causing the filtration speed to increase and the feed pressure to rise rapidly.
• Increase in liquid viscosity: When the liquid viscosity rises, it causes greater resistance to flow through the filter media, which in turn raises the slurry feed pressure.
• Clogging of filter media: If the filter media (such as filter cloth or filter plate) becomes clogged with solid particles, it will obstruct the liquid flow and result in increased feed pressure.
• Improper selection or wear of filter media: The selection of filter media directly affects the filtration efficiency and pressure changes of the plate and frame filter press. Choosing inappropriate filter media may result in too fast a filtration rate and a rapid increase in feed pressure. After long-term use, the filter media may form larger pores due to wear, resulting in faster filtration speed and higher feed pressure.
• Improper operation: Improper operation may cause the feed pressure to rise too quickly. For example, too fast a feed rate or improper pressure regulation may cause abnormal pressure changes.

The Dangers of Too High Feed Pressure

• Increased stress on the equipment: Excessive feed pressure subjects the filter press to additional forces, potentially leading to deformation, rupture, or other structural damage.
• Decreased filtration efficiency: Excessive slurry feed pressure will affect the solid-liquid separation process, causing the filtration efficiency to decrease and the expected separation effect to not be achieved.
• Increased operating energy consumption: High feed pressure means that the equipment requires more energy to drive, which increases the operating energy consumption of the equipment.
• Shortened equipment life: Long-term high-pressure operation will accelerate the wear and aging of equipment and shorten the service life of equipment.

Solutions to Excessive Feed Pressure

1. Control the feed flow: Reasonably control the feed flow to ensure that it does not exceed the processing capacity of the equipment and avoid excessive feed pressure.
2. Control the feeding speed: prevent too much granular material from entering the plate and frame filter press and slow down the rate of pressure increase.
3. Control the viscosity of the liquid: When possible, control the viscosity of the liquid and reduce the slurry feed pressure by adjusting the temperature of the liquid or adding diluent.
4. Clean the filter media regularly: Clean the filter media regularly to prevent clogging of solid particles and maintain the smoothness of the filter media.
5. Reasonable selection of filter media: According to the nature of the material and filtration requirements, select the appropriate filter media to ensure that the filtration speed and pressure are controlled within a reasonable range.
6. Regularly replace filter media: According to usage, replace damaged or aging filter media regularly to ensure filtration effect and normal operating pressure.
7. Training operators: Train operators on correct operating methods to ensure they understand the usage principles and operating techniques of the plate and frame filter press.
8. Regular maintenance and upkeep: Perform regular maintenance and upkeep on the filter press, including cleaning, lubrication, inspection, etc., to ensure the normal operation and performance of the equipment.