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

A technology of functional modules and mist droplets, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of large pressure drop of gas distribution plate, large pressure drop of fixed bed adsorption method, and low pressure of purification module, etc. Achieve the effect of improving the absorption capacity and increasing the probability of absorption and capture

Active Publication Date: 2015-04-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 10 circular paper honeycomb panels with a diameter of 200mm (containing 10 layers of honeycomb layers and 10 layers of separator layers respectively), the thickness of each layer of paper honeycomb panels is 40mm, and the side length of the regular hexagon of the honeycomb layer section is 4mm. Punch holes along the centerline and the regular hexagonal contour at different positions of the adjacent separator layer, and set a vertical baffle at the centerline with a height of 0.8 mm, and impregnate 8 layers of paper honeycomb boards with 30% silicon In the slurry of algae earth and 0.1% polyvinyl alcohol (MW300,000), take it out and dry it, while the other two layers of paper honeycomb are immersed in the slurry containing 10% activated carbon powder and 0.5% gelatinized starch, take it out and dry it Dry, the paper honeycomb layer loaded with diatomaceous earth is placed in front, and the paper honeycomb layer loaded with activated carbon is placed behind, and a fun...

Embodiment 2

[0015] Take 20 square paper honeycomb panels with a size of 300mm×300mm (containing 20 layers of honeycomb layers and 20 layers of separator layers respectively), the thickness of each layer of paper honeycomb panels is 100mm, and the side length of the regular hexagon of the honeycomb layer section is 10mm , punch holes along the centerline and the regular hexagonal contour at different positions of the adjacent separator layer, and set a vertical baffle at the centerline, the height of the baffle is 9mm, and impregnate 10 layers of paper honeycomb boards with 50% expansion In the slurry of vermiculite powder and 5% polyethylene glycol (MW1000), take it out and dry it, while the other 10 layers of paper honeycomb are immersed in the slurry containing 1% active coke powder and 0.1% methylcellulose, take it out After drying, the paper honeycomb layer loaded with vermiculite powder is placed in front, and the paper honeycomb layer loaded with active coke is placed behind, and a f...

Embodiment 3

[0017] Take 30 pieces of paper honeycomb panels with a diameter of 1000mm (containing 30 layers of honeycomb layers and 30 layers of separator layers respectively), the thickness of each layer of paper honeycomb panels is 300mm, and the side length of the regular hexagon of the honeycomb layer section is 200mm. The different positions of the adjacent partition layer are perforated along the centerline and regular hexagonal contour, and a vertical baffle is set at the centerline, the height of the baffle is 20mm, and 22 layers of paper honeycomb panels are impregnated with 40% activated alumina powder and 2% polyvinyl alcohol (MW 25,000), take it out and dry it, while the other 8 layers of paper honeycomb are impregnated in a slurry containing 20% ​​chopped activated carbon fiber and 0.1% cationic etherified starch, After taking it out and drying it, the paper honeycomb layer loaded with activated alumina is placed in front, and the paper honeycomb layer loaded with chopped acti...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/00B01D53/04
Inventor 刘海弟徐俊波温浩李伟曼黄亿苹陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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