Activated carbon filter element and preparation method thereof

Abstract

The invention relates to an activated carbon filter element. The filter element comprises a cylindrical central rod and a filter layer arranged outside the central rod. The filter layer comprises activated carbon particles and fibers coating the activated carbon particles; the fiber content of the innermost layer of the filter layer is set between 30% and 70%, the fiber content of the outermost layer of the filter layer is set between 20% and 60%, and the fiber content of the innermost layer of the filter layer is higher than the fiber content of the outermost layer of the filter layer. The invention aims at providing an activated carbon filter element which has gradient change in product structure and has both good filtering effect, high flow velocity and high strength. Meanwhile, the invention provides a preparation method of the filter element, which is relatively simple and low in pollution.

Description

Technical field [0001] The invention relates to a filter element, in particular to an activated carbon filter element and a preparation method thereof. Background technique [0002] Activated carbon filter element is a relatively common filter element product. It is mainly used to remove pollutants in water, decolor, filter and purify liquids and gases. It is also used for air purification and waste gas recovery (such as gas benzene in the chemical industry). Recycling), the recovery and refining of precious metals (such as the absorption of gold). [0003] The common activated carbon filter element has a relatively simple structure. The outside is a cylindrical shell, and the inside of the shell is filled with active carbon material for filtering, and then the filter element is packaged. The activated carbon filter element of this structure is partially compacted and cannot form a three-dimensional spatial structure, resulting in low flow rate, high pressure loss, and even cloggi...

AI Technical Summary

Problems solved by technology

In the activated carbon filter element with this structure, the activated carbon part is compacted and cannot form a three-dimensional space structure, resulting in low flow rate, large pressure loss, and even clogging when using filtration; In the solid activated carbon filter element, the number of flow channels that can be generated during filtration is very small, so that some activated carbon particles cannot achieve an effective filtering effect. If the filtration pressure is forcibly increased to increase the filtration flow rate, some activated carbon particles will be filtered. The possibility of dispersing, adding activated carbon particle impurities in the filtrate, affecting the filtration effect

Furthermore, in the prior art, this type of filter element is mainly prepared by dry heating and extrusion. In this way, a large amount of dust is emitted during the preparation process, causing serious pollution in the workshop, affecting the environment and requiring more operators. The operation and the presence of dust also have a great impact on the health of the operating workers

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