Preparation method of function module for absorbing fog drops and VOC (Volatile Organic Compounds) in waste gas

Abstract

The invention discloses a preparation method of a function module for absorbing fog drops and VOC (Volatile Organic Compounds) in waste gas, belonging to the technical field of material preparation and environmental protection. The method disclosed by the invention comprises the following steps of: by taking paper honeycombs as base materials, punching along a central line and the outlines of separation plate layers at different position of adjacent separation plate layers and arranging a vertical baffle at the central line, then dipping a paper honeycomb module in a size containing absorbent powder, and taking the paper honeycomb module out and drying to acquire the function module for absorbing fog drops in the waste gas. Gas flow passes through the module in a baffling and swirling manner, wherein the fog drops are captured by absorbents on the inner walls of the paper honeycombs and the surfaces of the separation plate layers, so that the module can be used for efficiently removing the fog drops in the gas flow under the condition of a low pressure drop; and the preparation method disclosed by the invention is applied to the purification treatment of catering waste gas.

Description

technical field [0001] The invention relates to a method for preparing a functional module for absorbing mist and VOC in waste gas, and belongs to the technical fields of material preparation and environmental protection. Background technique [0002] At present, the haze pollution in the Yangtze River Delta, Pearl River Delta and Beijing-Tianjin-Hebei area is becoming more and more serious, which has seriously threatened the health of the people and the sustainable development of the economy. At the end of 2012, the extremely heavy haze pollution that hit Beijing and most of Hebei five times within a month sounded the alarm for my country's atmospheric environmental protection field. In the process of research on the source of haze, people found that the contribution of organic aerogels caused by catering to haze pollution suddenly became prominent, which put forward urgent technical requirements for the treatment of catering tail gas. However, recent studies have found th...

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Problems solved by technology

[0003] 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 mixtures in the exhaust gas. It is removed by catalytic oxidation. At present, there are some deep oxidation processes that are removed by ultraviolet light, ozone, etc., but many organic substances with large molecules are difficult to completely oxidize into carbon dioxide and water, and the partial oxidation products produced even have equal sizes. Toxicity and haze-causing activity, so the method of catalytic oxidation removal is not suitable for the removal of droplets in catering waste gas

However, it is difficult for ordinary range hoods using the baffle method to completely eliminate the emitted oil fume, so a simple and effective technical solution is needed to purify the catering waste gas treated by the range hood

In addition, because the exhaust gas emission in the catering industry is often not assisted by fans, the purification module must have a very low pressure drop. Therefore, the common fixed-bed adsorption method cannot be used due to the large pressure drop, while the fluidized bed adsorption method cannot be used despite the bed pressure drop. Not high, but the pressure drop of the lower gas distribution plate is relatively large, and it is generally necessary to install a cyclone separator after the fluidized bed to remove the escaped adsorbent particles due to crushing, which is often unacceptable for the occasion of catering waste gas treatment

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