Filtration type gas separation and purification equipment with rapid moving filtering layer

Abstract

A filter-type gas separating-cleaning apparatus with quickly moving filter layer features that its filter cylinder rotating at high speed is composed of external filter net, supporting posts, internal filter net, shaft sleeve, shaft disk and supporting rings, and the gas containing solid particles and/or liquid drops is filtered by said filter cylinder. Its advantage is use of big-mesh filter material to remove fine solid particles and/or liquid drops, resulting in high filter speed, and easy cleaning.

Description

Technical field: [0001] The invention relates to the technical fields of environmental protection and ventilation, in particular to a gas separation and purification device. Background technique: [0002] In the prior art, the filter-type gas separation and purification device is the most important equipment for separating solid-phase particles and / or liquid-phase droplets in the gas. Its working principle is: driven by a fan, solid-phase particles and The gas of / or liquid phase droplets passes through the static filter layer, and the solid phase particles and / or liquid phase droplets are trapped on the filter layer, so as to realize the separation of solid phase particles and / or liquid phase droplets in the gas to achieve the purification of the gas Purpose, according to this principle, the diameter of the intercepted solid particles and / or liquid droplets must be larger than the pore size of the filter layer, and the filtration efficiency depends on whether the fine solid ...

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Problems solved by technology

[0002] In the prior art, the filter-type gas separation and purification device is the most important equipment for separating solid-phase particles and / or liquid-phase droplets in the gas. Its working principle is: driven by a fan, solid-phase particles and The gas of / or liquid phase droplets passes through the static filter layer, and the solid phase particles and / or liquid phase droplets are trapped on the filter layer, so as to realize the separation of solid phase particles and / or liquid phase droplets in the gas to achieve the purification of the gas Purpose, according to this principle, the diameter of the intercepted solid particles and / or liquid droplets must be larger than the pore size of the filter layer, and the filtration efficiency depends on whether the fine solid particles and / or liquid droplets in the gas can be removed. / or liquid phase droplets, therefore, to remove fine solid particles and / or liquid phase droplets, filter materials with a smaller mesh size (usually 5-50 μm) must be used as the filter layer to Obtain high filtration efficiency; however, the current filter materials of the mesh small meeting are all made of paper and / or processed from cotton, linen, wool, artificial fibers, etc. The mechanical properties, high temperature resistance and corrosion resistance of these materials are all It is relatively poor, which not only reduces the service life of the filter layer, but also makes it difficult to directly handle high temperature and / or highly corrosive gases, which limits its scope of use; secondly, the filter material with small meshes will inevitably cause airflow to pass through The resistance is very large. In order to reduce the resistance of the airflow, the filter speed of 0.008-0.025m / s is generally selected, and the low filter speed must increase the area of ​​the filter layer when processing the same volume of gas, which will make the purification device The volume is huge, which increases the consumption and manufacturing cost of its manufacturing materials, and increases the land and space it occupies; moreover, even such a low filtration rate can generate resistance above 1000Pa, increasing the power consumed by the fan; in addition, in During filtration, with the accumulation of solid particles and / or liquid droplets in the treated gas on the filter layer, the pressure difference on both sides of the filter layer will increase, which will significantly reduce the amount of processed gas, and at the same time, some already The fine particles trapped on the filter layer are extruded to reduce the purification efficiency; in the currently known air filtration method, the solid phase particles and / or liquid phase droplets accumulated on the filter layer are usually cleaned by manual beating and mechanical vibration. The method of hitting the filter layer and / or air flow back blowing, high (low) pressure compressed air pulse back blowing, but these methods are all intermittent cleaning, which still makes the working condition of the filtration process unstable

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