A preparation method of a functional module for absorbing droplets and VOC in airflow

Abstract

The invention relates to a manufacturing method of a function module used for absorbing fog drops and VOC (volatile organic compounds) in airflows and belongs to technical field of material preparation and environmental protection. The manufacturing method includes utilizing honeycomb paper as a base material, drilling holes at different positions of two adjacent partition layers, impregnating the honeycomb paper in pulp containing absorbent powder, taking the honeycomb paper out and drying to obtain the function module for absorbing fog drops and VOC in the airflows. The airflows pass in a baffling manner in the function module, the fog drops and the VOC are captured by absorbent on the inner wall of the honeycomb paper and the surface of a partition layer, so that the function module can efficiently remove the fog drops and the VOC in the airflows under the condition of lower pressure drop, and is more applicable to purification and treatment of catering waste gas.

Description

technical field [0001] 本发明涉及一种用于吸收气流中雾滴和VOC的功能模块的制备方法,属于材料制备和环境保护技术领域。 Background technique [0002] 随着我国经济的高速发展,我国大中城市、经济发达地区和基础工业密集区域的灰霾空气污染日渐严重。随着我国对于SOx和NOx排放的限制日趋严格、相关环保技术和装置不断投入使用,我国大气环境中SOx和NOx的污染物排放总量逐年减少,然而,从目前的检测结果看,我国长三角、珠三角和京津冀各片区的灰霾污染反而日趋严重,已经严重威胁到了民众的身体健康和经济的可持续发展。 [0003] 随着当前对于灰霾污染溯源研究的深入,人们已经发现,城市可挥发性有机物(VOC)是灰霾污染的重要前驱体,而最近的研究发现,餐饮业和装修等生活面源排放的VOC在总VOC排放中所占比例接近20%,同时由于此类排放和人居密度关系密切,排放时间相对集中,很有可能是当前城市局部空气重度污染的元凶之一。 [0004] 具有中国特色的食品烹调方式大量使用煎、炒、炸等工艺,导致所排放的废气中大量含有油水混合物构成的雾滴,以及VOC,这使普通的采用折流法的抽油烟机难以完全消除所排放的油烟和VOC,因此需要一种简便有效的技术方案来净化经抽油烟机处理后的餐饮废气,此外,由于餐饮业的排放往往没有风机辅助,因此该净化模块必须压降很低,因此常见的固定床吸附法由于压降太大而无法采用,而流化床吸附法虽然床层压降不高,但下层的气体分布板压降较大,而且一般需要在流化床后安装旋风分离器,以去除因破碎而逃逸的吸附剂颗粒,这对于餐饮废气处理的场合往往是不能接受的。 [0005] 综上所述,目前我国亟需一种气阻小、通量大、能够有效去除餐饮业废气中的雾滴和VOC的技术方案,这对于从源头抑制餐饮业对大气灰霾污染的贡献至关重要。 Contents of the invention [0006] 本发明的目的在于通过一种简单的方法获得具有低气阻、高通量的高效去除雾滴和VOC的模块。该模块结构紧凑、制作方法简单、压降较低,对于餐饮废气中的雾滴、气溶胶粒子和VOC都具有一定的捕捉能力。 [0007] 本发明的目的是通过如下的技术方案实现的:采用纸蜂窝板为基体,在相邻的隔板层的不同位置打孔,再将纸蜂窝模块浸渍在...

AI Technical Summary

Problems solved by technology

[0004] Food cooking methods with Chinese characteristics use a large number of techniques such as frying, frying, and deep-frying, resulting in a large amount of mist droplets composed of oil-water mixture and VOC in the exhaust gas, which makes it difficult for ordinary range hoods using baffle method to completely eliminate Therefore, a simple and effective technical solution is needed to purify the catering waste gas treated by the range hood. In addition, since the catering industry often does not have fan assistance, the purification module must have a very low pressure drop. Therefore, the common fixed bed adsorption method cannot be used due to too large a pressure drop. Although the fluidized bed adsorption method has a low bed pressure drop, the gas distribution plate in the lower layer has a large pressure drop, and generally needs to be installed after the fluidized bed. Cyclone separator to remove escaped adsorbent particles due to crushing, which is often unacceptable for catering exhaust gas treatment occasions

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