What is the Reason for the Hardening of Filter Material in Quartz Sand Filter? How to Solve?

Quartz sand filter is a kind of equipment commonly used in the fields of water treatment and wastewater treatment. It can effectively remove suspended solids, colloids and partially dissolved substances in water. However, during use, we may encounter some problems, such as filter material hardening, which will affect the normal operation of the quartz sand filter. This article will analyze the reasons for the hardening of filter media in quartz sand filters and propose corresponding solutions.

First, let us understand what filter material hardening is. The hardening of the filter material refers to the excessive accumulation of particles on the surface of the filter material in the quartz sand filter, forming a dense film-like structure, making it difficult for water flow to penetrate, thus affecting the filtration effect. The main reasons for filter material hardening are as follows:

Uneven Particle Size of the Filter Material: When the particle size distribution of quartz sand is uneven, larger particles tend to gather together, forming areas with low porosity, which causes the hardening of the filter material.

Filter Media Residue: The water contains a large amount of impurities and debris. These impurities will enter the quartz sand filter with the water flow and accumulate on the surface of the filter material, forming a dense structure, which will cause the hardening of the filter material.

Excessively High Water Flow Speed: When the water flow speed is too fast, suspended substances in the water cannot be fully intercepted and dispersed, and waste accumulation is easily formed on the surface of the filter material, causing the filter material to harden.

For the above reasons, we can take the following solutions:

Choose the Appropriate Filter Material: In order to prevent the hardening of the filter material, we should choose a filter material with uniform particle size and appropriate porosity to ensure that the water flow inside the quartz sand filter can pass smoothly and achieve good filtration effect.

Regularly Clean the Filter Media: Regularly cleaning the filter material inside the quartz sand filter can effectively remove impurities and debris and avoid the occurrence of hardening of the filter material. Chemical cleaning or mechanical cleaning can be used for cleaning. Choose the appropriate method according to the actual situation.

Control the Water Flow Speed: When using a quartz sand filter, the water flow speed should be controlled to prevent the water flow from flowing too fast, causing excessive accumulation of waste and impurities on the surface of the filter material, and causing the filter material to harden. Generally speaking, the water flow speed should be controlled between 2-3 meters per hour.

Use Filter Media that is not easy to harden: AFM filter media is made of brown and green glass that is processed to obtain the appropriate particle size and shape, and then undergoes a three-step activation process. The designed AFM filter material has good adsorption performance and can effectively filter out impurities and microorganisms in water.

In short, the hardening of the filter material in the quartz sand filter will affect the normal operation of the equipment, so we need to take corresponding solutions. Reasonable selection of filter materials, regular cleaning of the filter media, and control of water flow speed can effectively avoid the occurrence of filter material hardening and ensure the stable operation of the quartz sand filter.