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A method of adsorption-catalysis cooking oil fume purification based on electrostatic method

A lampblack and electrostatic technology, which is applied in the purification of cooking fume and pollutants from cooking fume, can solve problems such as VOCs emission reduction, and achieve the effect of improving the service cycle and ensuring the efficiency of catalytic oxidation.

Active Publication Date: 2022-05-27
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the electrostatic oil fume purification equipment has a good effect on removing particulate matter such as oil droplets, it has basically no emission reduction effect on VOCs in catering oil fume pollutants

Method used

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  • A method of adsorption-catalysis cooking oil fume purification based on electrostatic method
  • A method of adsorption-catalysis cooking oil fume purification based on electrostatic method
  • A method of adsorption-catalysis cooking oil fume purification based on electrostatic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] MFI-Si-Al molecular sieve adsorption-catalyst material (the atomic ratio of Si and Al is Si / Al=350) was prepared using the method described in Example 1 in the above-mentioned patent application CN201910753147.0, and tableted to 20-40 mesh. The filtered high-concentration food and beverage oil fume pollutants (mainly including VOCs pollutants) are adsorbed, and the airspeed is 50,000h. -1 , the inlet concentration of non-methane total hydrocarbons is 600mg / m 3 (in terms of C), air volume 0.7m 3 / h, the wind speed is 0.6m / s, the initial efficiency of adsorption can reach more than 90%, and the adsorption saturation time is 130min.

[0112] When regenerating in the circulation module, a discharge device is installed upstream of the adsorption bed, the discharge method is dielectric barrier discharge, the wind speed is 0.01m / s, the discharge voltage is 25V, and the discharge time is 60min. After regeneration, the purification performance of the dual-function module is ba...

Embodiment 2

[0115] Si-Mn-MEL molecular sieve adsorption-catalyzed material was prepared by using the method of patent application CN201910753147.0 Example 1, compressed to 20-40 mesh, and adsorbed the high-concentration food and beverage oil fume pollutants after filtering, and the air velocity was 80,000 h -1, the inlet concentration of non-methane total hydrocarbons is 50mg / m 3 (in terms of C), a discharge device is installed upstream of the adsorption bed, and the air volume is 0.7m 3 / h, wind speed 0.6m / s, discharge voltage 25V, the concentration of non-methane total hydrocarbons at the outlet can be maintained at 10mg / m within 80-100min 3 Below, the purification efficiency is more than 80%, which meets the requirements of emission standards.

[0116] After adsorption, when regenerating in the circulation module, the discharge method is dielectric barrier discharge, the wind speed is 0.01m / s, the discharge voltage is 30V, and the discharge time is 40min. After regeneration, the funct...

Embodiment 3

[0118] Si-Cu-MEL molecular sieve adsorption-catalyst material (Cu content is 2wt%) was prepared using the method of patent application CN201910753147.0 Example 1, the powder was compressed into 20-40 mesh, and the processing space velocity was 20000h -1 , the inlet concentration of non-methane total hydrocarbons is 1500mg / m 3 (in terms of C), a discharge device is installed upstream of the adsorption bed, and the air volume is 0.7m 3 / h, the wind speed is 0.6m / s, the discharge voltage is 32V, and the adsorption and removal efficiency can be maintained above 80% for about 60min.

[0119] After the adsorption is completed, the discharge device is turned on for regeneration. The discharge method is dielectric barrier discharge, the wind speed is 0.01m / s, the discharge voltage is 32V, and the discharge time is 80min. After regeneration, the function of the dual-function module material is recovered well, and its performance effect trend is similar to the implementation. Example 1...

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Abstract

A method of adsorption-catalysis cooking oil fume purification based on the electrostatic method, in which a material area is added to the electrostatic degreasing module to construct an adsorption-catalysis dual-function purification module; at the same time, a circulation module is added to realize dual-function material regeneration. This method enables the oil fume to firstly purify the oil droplets and particles through the electrostatic area, and then enters the newly added material area to purify VOCs; a circulation system is added to realize the complete degradation of VOCs, so that the activity of the dual-functional materials can be restored. When cooking, that is, when catering fume pollutants occur, the electrostatic device of the dual-function purification system can effectively remove oil droplets and particulate matter in catering fume pollutants, and the adsorption-catalysis dual-functional material zone can effectively absorb remaining VOCs; cooking After the end, the dual-function purification module and the circulation module are turned on at the same time, and the VOCs adsorbed in the material area are converted into CO under the action of free radicals and active species generated by static electricity. 2 and H 2 O.

Description

technical field [0001] The invention relates to a method for purifying cooking oil fume, and belongs to the technical field of air pollution control. More specifically, it relates to a method for purifying cooking fume pollutants based on the synergistic effect of electrostatic method and adsorption-catalysis bifunctional catalyst. Background technique [0002] Food fume pollutants have great harm to the ecological environment and human health, and have gradually attracted attention in recent years. The composition of food fume pollutants is complex and can be divided into two categories: oil droplet particulate matter and gaseous pollutants, namely volatile organic compounds (VOCs). my country's food and beverage fume purification technology began in the early 20th century. The Emission Standard for Oily Fume in Food and Beverage Industry (GB 18483-2001) stipulates the emission limit of oily fume. The standard points out that oily fume refers to the volatile oil, organic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/44B01D53/32B01D53/72F24C15/20
CPCB01D53/32B01D53/8687B01D53/007B01D53/44B01D53/72B01D53/8671F24C15/20B01D2258/0275B01D2258/0283
Inventor 易红宏唐晓龙张媛媛于庆君赵顺征高凤雨周远松刘俊
Owner UNIV OF SCI & TECH BEIJING