Activated carbon adsorption filter

Activated carbon filter

Overview

Activated carbon filter is a new generation of filter product developed by Jinan Lufa Environmental Protection Technology Co., Ltd. for many years, with further adjustments made in process and technology.

Scope of application

Widely applicable to industries such as food, medicine, electronics, chemical, and industrial wastewater.

working principle

The adsorption principle of activated carbon is to form an equilibrium surface concentration on its particle surface, and then adsorb organic impurities into the activated carbon particles. The adsorption effect is very high in the early stage of use. But over time, the adsorption capacity of activated carbon will weaken to varying degrees, and the adsorption effect will also decrease accordingly. If the water in the aquarium is turbid and the organic content is high, activated carbon will quickly lose its filtering function. Therefore, activated carbon should be cleaned or replaced regularly.

The size of activated carbon particles also has an impact on adsorption capacity. Generally speaking, the smaller the activated carbon particles, the larger the filtration area. So, powdered activated carbon has the largest total area and the best adsorption effect, but powdered activated carbon is easy to flow into the aquarium with water, which is difficult to control and rarely used. Granular activated carbon is difficult to flow due to its particle formation, and impurities such as organic matter in water are also not easily blocked in the activated carbon filter layer. It has strong adsorption capacity and is easy to carry and replace.

The adsorption capacity of activated carbon is directly proportional to the contact time with water, and the longer the contact time, the better the filtered water quality. Attention: The filtered water should slowly flow out of the filter layer. New activated carbon should be washed clean before its first use, otherwise black water may flow out. Before installing activated carbon into the filter, a 2-3 centimeter thick sponge should be added at the bottom and top to prevent large particles such as algae from penetrating. After using activated carbon for 2-3 months, if the filtration effect decreases, new activated carbon should be replaced and the sponge layer should be replaced regularly.

function

In the water quality pretreatment system, activated carbon filters can adsorb residual chlorine that cannot be removed in the previous stage of filtration to prevent the subsequent reverse osmosis membrane from being oxidized and degraded. At the same time, they can also adsorb small molecule organic matter and other pollutants leaked from the previous stage, which has a significant adsorption and removal effect on odors, colloids, pigments, heavy metal ions, etc. in water, and also has the effect of reducing COD. It is possible to further reduce the SDI value of RO inlet water, ensuring SDI<5 and TOC<2 Oppm.

The operation of activated carbon filters is accomplished through a carbon bed. The activated carbon particles that make up the carbon bed have many micropores and a huge specific surface area, and have strong physical adsorption capacity. Water passes through a charcoal bed, and organic pollutants in the water are effectively adsorbed by activated carbon. In addition, there are some oxygen-containing pipe clusters on the non crystalline part of the surface of activated carbon, which effectively adsorb organic pollutants in the water passing through the carbon bed by activated carbon. Activated carbon filter is a commonly used water treatment equipment. As a pre-treatment for desalination systems, it can effectively ensure the service life of downstream equipment, improve effluent quality, prevent pollution, especially prevent free residual oxygen poisoning and pollution from downstream reverse osmosis membranes, ion exchange resins, etc.

The main factors affecting the adsorption efficiency and service life of activated carbon filters are: the type and concentration of pollutants, the residence time of the airflow in the filter material, and the temperature and humidity of the air.

When selecting, the filter form and activated carbon type should be determined based on the type, concentration, and treatment air volume of pollutants.

Both upstream and downstream of the activated carbon filter should have good dust removal filters with an efficiency specification not lower than F7. The upstream filter should prevent dust from blocking the activated carbon material; The downstream filter blocks the dust generated by the activated carbon itself.

The main factors affecting the adsorption of activated carbon

① Properties of Activated Carbon Adsorbents

The larger its surface area, the stronger its adsorption capacity; Activated carbon is a non-polar molecule that easily adsorbs non-polar or very low polarity adsorbates; The size of activated carbon adsorbent particles, the structure and distribution of pores, and surface chemical properties also have a significant impact on adsorption.

② Properties of adsorbate

Depending on its solubility, surface free energy, polarity, size and unsaturation of adsorbate molecules, concentration of attached substances, etc

③ PH value of wastewater

Activated carbon generally has a higher adsorption rate in acidic solutions than in alkaline solutions.

The pH value will affect the state and solubility of the adsorbate in water, thereby affecting the adsorption effect.

Jinan Lufa Environmental Protection Technology Co., Ltd

Address: West Exit of Feiyue Avenue, Licheng District, Jinan City

Phone: (Chen)

Website: www.lufahb.com, www.jnlfhb.com

Email: lufahb@163.com

WeChat official account: lufahuanbao