In the water quality pretreatment system, the activated carbon filter can adsorb the residual chlorine that cannot be removed in the previous stage filtration to prevent the subsequent reverse osmosis membrane from being oxidized and degraded. At the same time, it can also adsorb pollutants such as small molecular organic matter leaked from the previous stage. It has a more obvious adsorption and removal effect on odor, colloids, pigments, heavy metal ions, etc. in water, and also has the effect of reducing COD. It can further reduce the SDI value of RO influent water to ensure SDI <5, TOC <2.Oppm.
Activated carbon filter principle The work of the activated carbon filter is completed through the carbon bed. The activated carbon particles that make up the carbon bed have a lot of micropores and a huge specific surface area, and have a strong physical adsorption capacity. Water passes through the carbon bed, and the activated carbon effectively adsorbs the organic pollutants in the water. In addition, there are some oxygen-containing functional groups on the non-crystalline part of the activated carbon surface, so that the activated carbon effectively adsorbs the organic pollutants in the water passing through the carbon bed. The activated carbon filter is a commonly used water treatment equipment. As a pre-treatment of water treatment desalination system, it can effectively ensure the service life of the subsequent equipment, improve the water quality of the effluent, and prevent pollution, especially preventing the free residual chlorine poisoning pollution of the subsequent reverse osmosis membrane, ion exchange resin, etc. Granular activated carbon is used to further remove the residual chlorine, organic matter, and suspended impurities in the effluent of the mechanical filter, providing good conditions for subsequent reverse osmosis treatment.
The activated carbon filter mainly uses the activated carbon organic flocculent with high carbon content, large molecular weight, and large specific surface area to physically adsorb impurities in the water to meet the water quality requirements. When the water flows through the pores of the activated carbon, various suspended particles, organic matter, etc. are adsorbed in the pores of the activated carbon under the action of van der Waals force; at the same time, the chlorine (hypochlorous acid) adsorbed on the surface of the activated carbon undergoes a chemical reaction on the carbon surface and is reduced to chloride ions, thereby effectively removing chlorine and ensuring that the residual chlorine in the effluent is less than 0.1ppm, meeting the operating conditions of the RO membrane. As time goes by, the interceptions in the pores and between the particles of the activated carbon gradually increase, causing the pressure difference before and after the filter to increase until it fails. Under normal circumstances, according to the pressure difference before and after the filter, the filter material is back washed with reverse water flow so that most of the interceptions adsorbed in the pores of the activated carbon are stripped and carried away by the water flow, restoring the adsorption function; when the activated carbon reaches the saturated adsorption capacity and completely fails, the activated carbon should be regenerated or replaced to meet the engineering requirements.
Function and scope of application of activated carbon filter Activated carbon filter plays a huge role in purifying water resources. Through the purification of activated carbon filters, organic matter, heavy metals, colloids, and other impurities in dirty water can be well filtered out. It also plays a huge role in the treatment of deep water purification through reverse osmosis, ultrafiltration, and ion exchange. Professionally produced activated carbon filters can not only filter out obvious impurities in water but also filter out ions, odors, and other impurities in water, greatly improving the quality of water.
Activated carbon filters are widely used in factory sewage treatment and urban water resource purification.
Scope of application
Widely used in food, medicine, electronics, chemical industry, industrial wastewater and other industries.
1. It can meet the requirements of the hydraulic system for filtration accuracy and can prevent certain impurities from entering the system;
2. The filter element should have sufficient strength and will not be damaged by pressure;
3. It has a large flow capacity and small pressure loss;
4. It is easy to clean and replace. Installation points: