Method and device for removing oil mist and volatile organic matter in oil smoke

Abstract

The present invention relates to a method for eliminating the oil mist and the volatile organic matter in the oil smoke and a device thereof, and belongs to the catering oil smoke purification field. The method comprises the steps of ultraviolet photochemical oxidation, wet-method water spraying and honeycomb-shaped active carbon absorption. The main body of the device is a cylindrical container or a prismatic container, and is arranged on an oil smoke exhaustion pipeline, and is provided with an inlet adjusting section 2, a photochemical oxidation section 3, a spraying absorption section 4, a honeycomb-shaped active carbon absorption section 5 and an outlet adjusting section 6, which are arranged in turn. Three steps are matched with each other, thus effectively overcoming the weaknesses that the photochemical oxidation purification produces multiple aldehyde ketone category intermediate products, and produces a great amount of ozone and has low purification efficiency for individual pollutant composition; the oil smoke that is purified with the method of the present invention exceeds the national standard, and is free from influencing the people; the method can be widely used for the catering operation units such as the restaurant, etc. and has low installation and operation expense, and is safe and reliable.

Description

technical field [0001] The invention belongs to the field of cooking oil fume purification, and relates to a method and a device for removing oil mist and volatile organic compounds in the oil fume. Background technique [0002] 1. Traditional oil fume purification technology and its defects [0003] Traditional oil fume purification technologies currently occupy most of the market, and these technologies mainly include: [0004] 1. Mechanical separation method. The mechanical separation method is to use the principle of inertial collision or cyclone separation to separate and remove particulate matter from oil fume. Mechanical separation methods include inertial separation and cyclone separation. The inertial separation method separates the particles in the oil mist from the airflow through the inertia generated by the change of the airflow direction. The inertial separation method has simple equipment and small pressure drop, but the purification efficiency is not high...

AI Technical Summary

Problems solved by technology

The disadvantage is that the structure is complex and takes up a lot of space

[0010] Generally speaking, these traditional methods are all physical methods, which do not decompose harmful substances, and are prone to secondary pollution; Gaseous pollutants are powerless

When using these methods, gaseous pollutants can still diffuse into the air, causing hazards

Since the national standard only limits the emission concentration of cooking fume, but does not limit the emission concentration of volatile organic compounds in cooking fume, even if these purifiers meet the national standard, they cannot completely avoid the harmful effects of exhaust gas on the human body and the environment

[0011] 2. UV Photochemical Oxidation Technology and Its Defects

Since the national standard does not limit the short-chain gaseous pollutants in oil fume, this kind of emission is up to standard, but its harmful components will still cause harm to human body or environment

[0018] Second, for the easily degradable gaseous components in the oil fume, although ultraviolet light can receive a better degradation effect, due to the limited residence time, some of them cannot be completely degraded and are discharged as intermediate products

[0019] Third, there are still some components in the oil fume that are not easy to decompose under 185nm ultraviolet light, but can only be converted into some intermediate products

None of the existing ultraviolet oil fume purification equipment can guarantee that the ozone concentration emitted is lower than the regulations of these standards, but most of them are much higher than these regulations

Just because the existing national standards do not set a clear limit on the ozone content in the fume emission, the existing purification equipment will not exceed the standard

However, if the ozone content is too high, it will undoubtedly have a bad impact on the environment and human health.

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