Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrostatic method-based adsorption-catalysis catering oil fume purification 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: 2021-07-20
UNIV OF SCI & TECH BEIJING
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrostatic method-based adsorption-catalysis catering oil fume purification method
  • Electrostatic method-based adsorption-catalysis catering oil fume purification method
  • Electrostatic method-based adsorption-catalysis catering oil fume purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Use the method described in Example 1 of the above-mentioned patent application CN201910753147.0 to prepare MFI-Si-Al molecular sieve adsorption-catalytic material (the atomic ratio of Si and Al is Si / Al=350), and press it to 20-40 mesh. The filtered high-concentration food fume pollutants (mainly including VOCs pollutants) are adsorbed, and the treatment space speed is 50000h -1 , non-methane total hydrocarbon inlet concentration 600mg / m 3 (in 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 basically fully restored, and t...

Embodiment 2

[0115] Use the method of Example 1 of patent application CN201910753147.0 to prepare Si-Mn-MEL molecular sieve adsorption-catalytic material, press it to 20-40 mesh, and adsorb the filtered high-concentration cooking fume pollutants, with a space velocity of 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, non-methane total hydrocarbon concentration at the outlet within 80-100min can be maintained at 10mg / m 3 Below, the purification efficiency is more than 80%, which meets the requirements of emission standards.

[0116] After the adsorption is completed, 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 function of the material ...

Embodiment 3

[0118] Using the method of Example 1 of patent application CN201910753147.0 to prepare Si-Cu-MEL molecular sieve adsorption-catalysis material (Cu content is 2wt%), powder compression molding to 20-40 mesh, processing space velocity 20000h -1 , the inlet concentration of non-methane total hydrocarbons is 1500mg / m 3 (calculated in 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 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. Example 1, the concentration of NMHC in the final exhaust gas is about 5mg / m 3 , less than 10mg / m 3 , in line with emission standards. The results show that this technology ca...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an electrostatic method-based adsorption-catalysis catering oil fume purification method, which comprises the following steps of: additionally arranging a material area on the basis of an electrostatic oil removal module, and constructing an adsorption-catalysis dual-function purification module; meanwhile, additionally arranging a circulation module to realize regeneration of bifunctional materials. According to the method, oil drop particles are purified through the electrostatic region firstly, and then the oil fume enters the newly-added material region to purify VOCs; a circulating system is additionally arranged, so that the VOCs are thoroughly degraded, and the activity of the bifunctional material is recovered. During cooking, namely when catering oil smoke pollutants occur, the electrostatic device of the dual-function purification system can effectively remove oil drops and particulate matters in the catering oil smoke pollutants, and the adsorption-catalysis dual-function material area can effectively adsorb residual VOCs; and after cooking is finished, the dual-function purification module and the circulation module are started at the same time, and VOCs adsorbed in the material area are converted into CO2 and H2O under the action of free radicals generated by static electricity and active species.

Description

technical field [0001] The invention relates to a method for purifying cooking fumes, 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 an electrostatic method and an adsorption-catalysis dual-function catalyst. Background technique [0002] Catering lampblack pollutants are very harmful to the ecological environment and human health, and have gradually attracted attention in recent years. The composition of food fume pollutants is complex, which can be divided into two categories: oil droplet particles and gas pollutants, namely volatile organic compounds (Volatile Organic Compounds, VOCs). my country's cooking fume purification technology began in the early 20th century. The emission limit of cooking fume is stipulated in the "Catering Fume Emission Standard" (GB 18483-2001), which states that cooking fume refers to the emission of oil, organic ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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