CN114042369B - Cooperative processing method of organic pollutants and intelligent integrated processing equipment - Google Patents

Abstract

The invention provides a method for co-processing organic pollutants, and discloses a set of intelligent integrated processing equipment. The invention uses mesoporous photocatalyst material to adsorb and reduce the concentration of the collected organic pollutants, and mixes the gas phase and liquid phase of the pollutants with water in a nano-bubble generating device to prepare nano-bubble solution, thereby realizing long-acting and deep treatment of the organic pollutants and decomposing all harmful substances in the pollutants into non-toxic and harmless micromolecular substances such as water, carbon dioxide and the like. Meanwhile, under the irradiation of visible light, the desorption of material pollutants is promoted by utilizing nano bubbles and liquid-phase plasma, and the self regeneration cycle function of the material is realized. The invention is green and environment-friendly and has wide application prospect.

Description

Cooperative processing method of organic pollutants and intelligent integrated processing equipment

technical field

The invention relates to the technical field of processing organic pollutants (VOCs) in the manufacturing industry, and specifically relates to a method for synergistic processing of organic pollutants and intelligent integrated processing equipment.

Background technique

Volatile organic compounds (VOCs) are a general term for a class of organic pollutants that are ubiquitous and complex in the air. VOCs are harmful, with complex components and wide sources. They are one of the four major air pollutants and are an important factor in the formation of PM2.5 and photochemical smog; they can damage the human nervous system, blood components and cardiovascular system, and are harmful to human health and social environment. Great impact. The governance and emission reduction of VOCs has become a severe problem in the field of processing and manufacturing.

PM2.5 is also called fine particulate matter. Refers to particulate matter in the air environment with an aerodynamic equivalent diameter less than or equal to 2.5 microns. It is characterized in that it can be suspended in the air for a long time, and the higher the concentration, the more serious the air pollution; although PM2.5 accounts for a very small proportion compared to other components in the atmosphere, it is extremely important for visibility and air quality. Influence. The particle size is small, the area is large, the activity is strong, and it is easy to attach toxic and harmful substances (such as heavy metals, microorganisms, etc.), and the residence time in the atmosphere is long, and the transportation distance is long, so it has a greater impact on human health and the quality of the atmospheric environment. .

In essence, the existing organic pollutant treatment equipment simply uses high-energy ultraviolet radiation technology to break the internal molecular chains of bacterial DNA and nucleoprotein, resulting in overall cross-linking damage, and finally the death of bacteria; not only because of the gas-phase high-energy reaction, it is easy to Cause dust explosion, and although the ozone molecules formed by light in the 185 nanometer band can realize the catalytic oxidation of organic pollutants, the ozone molecules themselves are also one of the goals of energy saving and emission reduction;

Nano-bubble technology refers to: it makes water and air mix together, and ultrasonic cavitation disperses ultra-micron bubbles to form a "milky white" gas-liquid mixture below 100nm. Nano-bubbles not only have a high zeta potential generated by the surface charge, but also have a good adsorption effect on paint mist; when the nano-bubbles rupture, they can produce highly active substances such as hydroxyl radicals and can also accelerate the decomposition of organic matter; the formation of nano-bubbles expands the gas-liquid contact area And no secondary pollution;

Photocatalytic technology refers to the technology in which mesoporous photocatalyst materials absorb light energy and convert it into chemical energy. The basic principle is that when light is irradiated on the surface of the material, the electrons based on the valence band are stimulated to transition to the conduction band, then holes are generated in the valence band, and electrons are formed in the conduction band, thereby forming photogenerated electron-hole pairs. Under the light, it continuously undergoes redox reactions with the substances adsorbed on the surface of the catalyst, so as to achieve the purpose of degrading organic pollutants.

Liquid plasma technology refers to the technology in which conductive electrodes generate discharge plasma in liquid under the condition of pulsed high voltage. Plasma is rich in high-energy electrons and active substances, and has super-strong oxidation activity. Moreover, plasma electrolysis of water produces a large number of highly active species of hydroxyl radicals OH and superoxide radicals O2-. In addition, the liquid plasma discharge produces extremely strong UV ultraviolet rays, and photocatalysis occurs.

Contents of the invention

Aiming at the potential safety hazards and existing deficiencies of the prior art, the present invention provides a method for synergistic treatment of organic pollutants and an intelligent integrated treatment equipment, utilizing the synergistic effect of various advanced redox technologies, in addition to having deep and long-term treatment of organic pollutants, etc. In addition to the advantages, it also solves the safety hazards of traditional equipment processing and the problem of secondary pollution by by-products

In order to solve the above problems, the invention provides a method for synergistic treatment of organic pollutants, comprising the following steps:

Filtration and adsorption step: use new mesoporous photocatalyst materials to replace traditional activated carbon materials to absorb and reduce the concentration of collected organic pollutant waste gas;

Nano-bubble generation: Mix the gas phase, liquid phase and water of the above-mentioned adsorbed and reduced pollutants through the nano-bubble generating device to make a nano-bubble solution to realize the liquid phase of the reaction environment;

Co-processing step: the aforementioned liquid-phase nano-bubble solution is passed into the co-processing unit, and photocatalytic technology and liquid phase ion discharge technology are used to achieve deep and long-term degradation of organic pollutants.

According to the organic pollutant co-processing method described above, it is characterized in that the processing method also includes:

Material activation and regeneration: The adsorbed mesoporous photocatalyst material is placed in a co-processing unit, and under the irradiation of visible light, nano bubbles and liquid phase plasma are used to promote the desorption of pollutants to realize the activation of the mesoporous photocatalyst material.

According to another aspect of the present invention, the present invention further provides integrated equipment for intelligent monitoring and treatment of organic pollutants, including a pretreatment device, a cooperative processing device, and a detection and feedback device;

Pretreatment device: It has a fan to collect organic pollutant waste gas inlet and liquid phase pollutant inlet. The pretreatment device is equipped with a glass fiber filter, a first-stage filter device, and a nano-bubble device to achieve filtration and concentration reduction of pollutants and nano-bubbles. ;

Cooperative processing device: connected to the pretreatment device, including a cylindrical reaction chamber, a stirring device, a high-power LED light source, and a liquid phase plasma discharge device, to achieve deep and long-term degradation of the organic pollutants contained in the nanobubbles in the front stage;

The detection feedback device: connected with the cooperative processing device, equipped with a FID flame ionization detection instrument, realizes the intelligent judgment on the emission of purified gas through an intelligent algorithm.

Further, in the pretreatment device, a glass fiber filter is used to filter large dust particles in the exhaust gas. The glass fiber filter is based on an environmentally friendly water-soluble phenolic resin, impregnated with high-silica glass fiber cloth, and then High-temperature curing molding, the diameter of the single filament is several microns to more than 20 microns, and the filtration efficiency of dust particles such as 0.1-0.2 μm paint mist can reach more than 99%.

Further, in the pretreatment device, the mesoporous photocatalyst material used in the primary filter device adopts the preparation technology of the core-shell structure composite material, adopts activated carbon as the porous skeleton, and wraps titanium oxide with nanoscale thickness on the surface of the skeleton, thereby The core-shell structure photocatalyst material that constitutes the porous skeleton-titanium oxide core is finally made by reducing the material through a hydrogen heat treatment process at normal temperature and pressure, and its specific surface area is greater than 1000m2/g.

Further, the diameter of nanobubbles formed by organic pollutants and water in the nanobubble generating device in the pretreatment device is less than 100 nm.

Further, the gas-liquid ratio per minute at the inlet of the nanobubble generating device of the pretreatment device is 1:35-1:40.

Further, in the synergistic processing device, a stirring device is provided in the reaction chamber, which is a vertical stirring rod, and a power drive device is provided at the upper end of the stirring rod, and the power driving device can drive the stirring rod to rotate, and the stirring speed range is 0- 300r/min.

Further, in the synergistic processing device, the high-power LED light sources are evenly arranged with the stirring device as the center of the circle, and are not immersed in the reaction chamber, but the reaction chamber is perforated up and down, and has a transparent outer wall.

Further, in the cooperative processing device, the high-power LED light source is a visible light source of 200-1100nm.

Further, plasma probes are arranged on the lower half of the outer wall of the light source in the cooperative processing device, and the number of the probes ranges from 20 to 50 per outer wall.

Further, the liquid-phase plasma discharge voltage in the co-processing device is 200V.

Further, the liquid-phase plasma discharge current in the co-processing device is 2A.

Further, the frequency of the liquid-phase plasma discharge in the co-processing device is 100 Hz.

Further, in the co-processing device, the reaction chamber is equipped with mesoporous photocatalyst material, which can realize the full-spectrum response of visible light within 200-1100 nm, to assist photocatalytic degradation.

Further, in the detection and feedback device, the concentration of organic pollutants is detected by FID flame ionization, intelligent judgment is made, and the discharge reaches the standard, and if it fails to meet the standard, it is circulated to the nanobubble generating device for recycling treatment.

Compared with the prior art, the present invention has the advantages of:

The invention can not only efficiently realize the deep and long-term degradation of organic pollutants, but also utilize the synergistic reaction of multiple advanced redox technologies to change the reaction phase from gas phase to liquid phase, avoiding potential safety hazards, and also uses visible light sources , decomposing pollutants into non-toxic and harmless small molecular compounds such as water and carbon dioxide, and no pollutants such as ozone are generated, avoiding hidden dangers of secondary pollution, which reflects the high efficiency, safety and environmental protection of the invention.

Description of drawings

Fig. 1 is a flow chart of collaborative processing of multiple technologies of the present invention;

Fig. 2 structural representation of the present invention;

Among them, 1 pretreatment device, 101 air inlet, 102 liquid inlet, 103 fan, 104 filter device, 105 nano-bubble generating device, 106 liquid storage tank, 107 nano-bubble inlet, 108 nano-bubble outlet, 109 feedback loop inlet , 2 synergistic reaction device, 201 forming a pair of reaction chambers, 202 agitator, 203 light source, 204 light source outer wall, 205 plasma probe, 206 internal circulation liquid outlet, 207 liquid outlet, 3 detection feedback device, 301 intelligent algorithm Module, 302 non-standard circulation channel, 303 standard discharge channel.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention. Those skilled in the art can think of other obvious deformations, without departing from the concept of the present invention. Belong to the protection scope of the present invention.

Please refer to Figure 1, an integrated intelligent device for organic pollutant monitoring and treatment, including a pretreatment device (1), a collaborative processing device (2) and a detection and feedback device (3), which is characterized in that the three parts of the device are arranged in parallel , in order to realize the function of organic pollutant treatment;

When the fan (103) is turned on, the exhaust gas of organic pollutants will be inhaled through the air inlet (101) and enter the first-stage filter device (104). The mesoporous photocatalyst material in (104) will physically adsorb the waste gas; then generate a large number of nanobubbles with a diameter of less than 100nm in the nanobubble generating device (105) according to the gas-liquid ratio, and change the subsequent reaction phase from gas phase to liquid phase , and at the same time in the liquid storage tank (106), accompanied by the collapse of some nano-bubbles, the first-order oxidation-reduction degradation is realized;

In the synergistic reaction device (2), start the stirrer (202), so that the mesoporous photocatalyst material in the reaction chamber is evenly distributed in the liquid phase environment, turn on the light source (203), and form a uniform The light intensity of the nano-bubbles is irradiated, so that the pollutants after the nanobubbles are broken are adsorbed by the mesoporous photocatalyst material, and at the same time, the photogenerated electron-hole pairs are excited on the surface of the material, and the pollutants are oxidized and reduced; (204) Plasma probes (205) are arranged on the lower half to perform liquid-phase plasma discharge to degrade pollutants, which produces a large number of hydroxyl radicals·OH and high activity of superoxide radicals O2- Substances capable of redoxing pollutants;

After the final product passes through the FID detector of the detection feedback device (3), it is judged by the intelligent algorithm module whether it meets the standard discharge, and if it does not meet the standard, it enters the liquid storage tank (106) in the pretreatment device (1) for secondary treatment.

The integrated intelligent equipment for organic pollutant monitoring and treatment can not only efficiently degrade the waste gas of organic pollutants in the manufacturing industry, but also use the synergistic reaction of various technologies to change the reaction phase from gas phase to liquid phase, avoiding safety hazards. At the same time, visible light sources are used to decompose pollutants into harmless compounds such as water and carbon dioxide, and no pollutants such as ozone are generated, avoiding hidden dangers of secondary pollution, which reflects the advantages of the integrated monitoring and treatment device Efficiency, safety and environmental protection.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention, so Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the broadest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. A method for cooperatively processing organic pollutants is characterized in that synchronous processing of the organic pollutants is realized while detection is carried out, and the method specifically comprises the following steps:

(1) A filtering and adsorbing step: the mesoporous photocatalyst material is used for replacing the traditional activated carbon material to adsorb the collected organic pollutant waste gas to reduce the concentration;

(2) And (3) generation of nano bubbles: mixing the gas phase and the liquid phase of the adsorbed and reduced-concentration pollutants with water through a nano bubble generating device to prepare a nano bubble solution, so as to realize the liquefaction of a reaction environment;

(3) A cooperative processing step: and introducing the liquid-phase nano bubble solution into a synergistic treatment unit, and utilizing a photocatalysis technology and a liquid-phase plasma discharge technology to realize deep long-acting degradation of the organic pollutants.

2. The organic pollutant co-processing method according to claim 1, characterized in that the processing method further comprises:

material activation and regeneration: and placing the adsorbed mesoporous photocatalyst material in a synergistic treatment unit, and promoting the desorption of pollutants by utilizing nano bubbles and liquid-phase plasma under the irradiation of visible light to realize the activation of the mesoporous photocatalyst material.

3. One set of organic pollutant intelligent monitoring and integrated equipment of handling, its characterized in that includes:

a pretreatment device: the device is provided with a fan, an organic pollutant waste gas inlet and a liquid phase pollutant inlet, wherein the organic pollutant waste gas inlet is connected with the fan, and a glass fiber filter screen, a primary filtering device and a nano bubble device are arranged in a pretreatment device so as to realize the filtration and concentration reduction of pollutants and the nano bubble formation;

a cooperative processing device: the device is connected with a pretreatment device, comprises a cylindrical reaction cabin, a stirring device, a high-power LED light source and a liquid-phase plasma discharge device, and realizes deep long-term degradation of organic pollutants contained in the front-stage nano bubbles;

a detection feedback device: and the flame ionization detection device is connected with the cooperative processing device and is provided with an FID flame ionization detection instrument, and the intelligent judgment on the emission of the purified gas is realized through an intelligent algorithm.

4. The integrated equipment for intelligent monitoring and treatment of organic pollutants as claimed in claim 3, wherein in the pretreatment device, a glass fiber filter screen is used for filtering large-particle dust particles in the exhaust gas, the glass fiber filter screen takes environment-friendly water-soluble phenolic resin as a matrix, high-silica glass fiber cloth is impregnated, and then the high-temperature curing molding is carried out, wherein the diameter of a monofilament is 0-30 micrometers, so that the filtering of dust particles of 0.1-0.2 micrometers can be realized.

5. The integrated apparatus of claim 3, wherein the first filtering device of the pre-treatment device contains mesoporous photocatalyst material, the mesoporous photocatalyst material is prepared by a core-shell structure composite material preparation technology, activated carbon is used as a porous framework, titanium oxide with nanometer thickness is wrapped on the surface layer of the framework to form the core-shell structure photocatalyst material of the porous framework-titanium oxide core, and finally the material is reduced by a hydrogen thermal treatment process at normal temperature and pressure, and the specific surface area of the material is larger than 1000m ² /g。

6. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein in the pretreatment device, the diameter of the nanobubbles formed by the organic pollutants and water in the nanobubble generation device is less than 100nm.

7. The integrated equipment for intelligent monitoring and treatment of organic pollutants as claimed in claim 3, wherein in the pretreatment device, the gas-liquid ratio at the inlet of the nano bubble generation device is 1 to 35 to 1.

8. The integrated intelligent monitoring and treating apparatus for organic pollutants as claimed in claim 3, wherein the reaction chamber of the cooperative processing apparatus is provided with a stirring device, which is a vertical stirring rod, the upper end of the stirring rod is provided with a power driving device, the power driving device can drive the stirring rod to rotate, and the stirring speed ranges from 0r/min to 300r/min.

9. The integrated intelligent monitoring and processing apparatus for organic pollutants as claimed in claim 3, wherein in the cooperative processing apparatus, the high power LED light sources are uniformly arranged around the stirring apparatus, are not immersed in the reaction chamber, but are perforated at the upper and lower parts of the reaction chamber, and are provided with transparent outer walls.

10. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein the high power LED light source in the cooperative treatment device is a visible light source of 200-1100 nm.

11. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein plasma probes are arranged on the lower half end of the outer wall of the high-power LED light source in the cooperative treatment device, and the number of the plasma probes is 20-50 for each outer wall.

12. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein the voltage of the liquid phase plasma discharge in the cooperative treatment device is 200V.

13. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein the co-treatment device is a liquid phase plasma discharge with a current of 2A.

14. The integrated intelligent monitoring and treatment device for organic pollutants as claimed in claim 3, wherein the frequency of liquid phase plasma discharge in the cooperative treatment device is 100Hz.

15. The integrated apparatus for intelligent monitoring and treatment of organic pollutants as claimed in claim 3, wherein the reaction chamber of the co-processing device contains the mesoporous photocatalyst material as claimed in claim 5, which can achieve full-spectrum visible light response within 200-1100nm to assist photocatalytic degradation.

16. The integrated equipment for intelligent monitoring and treatment of organic pollutants as claimed in claim 3, wherein in the detection feedback device, the concentration of organic pollutants is detected through FID flame ionization, intelligent judgment is carried out, emission is reached, and if the concentration is not reached, the organic pollutants are circulated to the nano-bubble generating device for circular treatment.

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