Activated carbon filter element and preparation method thereof

Abstract

The invention relates to an activated carbon filter element, comprising a cylindrical central rod and a filter layer arranged outside the filter layer, wherein the filter layer includes activated carbon particles and fibers coated on the outside of the activated carbon particles, and the innermost layer of the filter layer The density is set at 0.3g / cm 3 ‑0.5g / cm 3 In between, the density of the outermost layer of the filter layer is set at 0.2g / cm 3 ‑0.4g / cm 3 and the density of the innermost layer of the filter layer is greater than the density of the outermost layer of the filter layer. The purpose to be achieved by the present invention is to provide an activated carbon filter element with a gradient product structure and taking into account the filtration effect, flow rate and strength; and at the same time to provide a relatively simple preparation method for the filter element with little pollution.

Description

technical field [0001] The invention relates to a filter element and a preparation method thereof, 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, which is mainly used to remove pollutants in water, decolorize, filter and purify liquid and gas, and also used for air purification and waste gas recovery (such as gas benzene in the chemical industry). recovery), recovery and refining of precious metals (eg absorption of gold). [0003] The common activated carbon filter has a relatively simple structure. The outside is a cylindrical shell, and the inside of the shell is filled with activated carbon material for filtering, and then the filter element is packaged. For the activated carbon filter element of this structure, the activated carbon part is compacted and cannot form a three-dimensional spatial structure, resulting in a low f...

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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