CN215876868U - Special integrated waste gas treatment equipment for graphene preparation - Google Patents

Abstract

Special integrated exhaust-gas treatment equipment of graphite alkene preparation, equipment include four modules: the three-level spraying module, the electrostatic trapping module, the photocatalyst filtering module and the adsorption module are arranged, and an induced draft fan is arranged at the entrance of each module device to provide power. The method is specially used for treating organic volatile gases such as carbon monoxide, carbon dioxide, methane, ethylene, acetylene, benzene, toluene, CnHm alkane olefins, dimethylamine, formaldehyde, formic acid and the like in the waste gas generated by producing the graphene by thermally cracking the phenolic resin, and organic pollutants such as a large amount of carbon particles and a small amount of dioxin overflowing along with a gas phase, so that the finally discharged waste gas generated by producing the graphene reaches the emission standard.

Description

Special integrated waste gas treatment equipment for graphene preparation

Technical Field

The utility model relates to the technical field of waste gas treatment environment-friendly equipment, in particular to integrated waste gas treatment equipment special for graphene preparation.

Background

Graphene is a new material with a single-layer two-dimensional honeycomb lattice structure, has excellent optical, electrical and mechanical properties, and has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like. The industrial preparation and production technology is the current hotspot. The raw material for preparing the graphene can be carbon-based material, such as phenolic resin and the like, the carbon-based material is heated to more than 1000 ℃ in a closed environment, carbon bonds are broken and pyrolyzed into organic gas, and the carbon bonds are recombined and deposited to form the layered graphene under the action of the catalyst.

Relevant prior documents on the preparation of graphene from phenolic resins were retrieved:

1. the research on the mechanism of graphene formation by pyrolysis of nickel modified phenolic resin, new materials for chemical industry, 2016 (8 months) and applied chemical research institute of Wuhan science and technology university.

2. A method for preparing graphene by pyrolyzing iron modified phenolic resin; application No.: CN 201911312908.5; the applicant: wuhan university of science and technology; and (3) abstract: a method for preparing graphene by pyrolyzing iron modified phenolic resin belongs to the technical field of graphene. Under the protection of inert gas, controlling the heating rate to be 15-30 ℃, heating the temperature to 800-1500 ℃, and pyrolyzing for 2.5-10 h to obtain graphene, wherein the iron-modified phenolic resin is obtained by taking a phenolic compound, an aldehyde compound and an alkaline catalyst under the catalytic action of a chelating agent and ferrocene; the yield of the obtained iron modified phenolic resin is more than 83%, and the efficiency of preparing graphene by catalytic pyrolysis of the iron modified phenolic resin is higher.

Although the method for preparing graphene is efficient and has high yield, in the process of preparing graphene, organic volatile gases such as carbon monoxide, carbon dioxide, methane, ethylene, acetylene, benzene, toluene, CnHm olefins, dimethylamine, formaldehyde, formic acid and the like, and organic pollutants such as a large amount of carbon particles and a small amount of dioxin which overflow along with a gas phase are generated by thermal cracking of phenolic resin, and the organic pollutants seriously pollute the environment and are extremely harmful to human health.

Disclosure of Invention

The utility model provides integrated waste gas treatment equipment special for graphene preparation, which has the advantage of high treatment efficiency, and the treated waste gas meets the emission standard and has no serious adverse effect on the environment.

The technical scheme of the utility model is realized as follows:

special integrated exhaust-gas treatment equipment of graphite alkene preparation, equipment include four modules: the three-level spraying module, the electrostatic trapping module, the photocatalyst filtering module and the adsorption module are arranged, and an induced draft fan is arranged at the entrance of each module device to provide power.

The liquid outlet pipe of the recovery tank below the three-stage spraying module is connected with the spraying pipeline of the spraying tower, and the liquid outlet pipe is provided with an absorption liquid supplementing tank connected with the spraying pipeline.

The waste gas enters the interior of the spray tower, and acidic volatile gases such as hydrochloric acid, sulfuric acid, formaldehyde, formic acid and the like are contacted and adsorbed by atomized absorption liquid sprayed by a spray head and fall into a recovery tank at the bottom of the spray tower; the three-stage spraying can ensure that the acidic volatile gas is completely absorbed. The outlet pipeline in the recovery pond sends the absorption liquid circulating pump of retrieving to spray piping and uses, and when the absorption liquid concentration was not enough, open the valve of absorption liquid replenishment jar, pour into the absorption liquid and improve the concentration of absorption liquid into circulating pipeline, continue to react with waste gas, when the reactant composition of absorption liquid was too thick, then discharged the change with reaction liquid is whole.

The electrostatic trapping module is a multistage trap and is divided into a plurality of trapping areas, and an air inlet and an air outlet between every two trapping areas are connected end to end. The electrostatic trap ionizes dioxin particles in waste gas by utilizing a high-voltage electric field, dust charges in the air flow are separated from the air flow under the action of the electric field, and when the waste gas particles pass through the ionizing electric field of a trapping area of the electrostatic trap, the charged dioxin particles are deposited on a dust collecting electrode, so that the effect of purifying the dioxin particles in the waste gas is achieved.

Each trapping area of the static trapping module is provided with a multi-stage runway type diversion air duct, and a gathering groove is arranged below the air duct. After entering a middle channel, the waste gas with pollutant microparticles is in contact with an electrode column of a middle inner cavity and then is negatively charged, an inner return gallery plate is positively charged, an outer return gallery plate is grounded with a shell, and when passing through a multi-stage runway, the negatively charged particles are adsorbed by the positively charged inner multi-stage runway plate and then are vibrated down to a lower gathering tank for collection and treatment through a vibrator arranged in the catcher; the multistage runway prolongs the flowing distance of waste gas, so that the adsorption effect of pollution particles can be greatly improved.

The photocatalyst filtering module is provided with an air inlet at the top and divergent fan blades, the lower part is a divergent air deflector, and a plurality of ultraviolet lamps and a plurality of layers of photocatalyst filtering plates are arranged on the inner side wall of the shell at the lower part. The photocatalyst filter is internally provided with an ultraviolet light tube as a light source and a titanium dioxide photocatalyst filter plate, the photocatalyst filter plate generates active oxygen and hydroxyl radicals with extremely strong oxidation action, and harmful gas molecules such as residual toluene, phenol, cresol and the like in waste gas are oxidized and decomposed into harmless CO2 and H2O, so that the purposes of purifying air and decomposing harmful organic matters are achieved. The divergent fan blades are provided with a plurality of air guide ribs which are inclined to the outer side, so that the effect of diverging the inlet air and the waste gas is achieved; the wind deflector arranged in a divergent way can further guide the wind direction to enter the photocatalyst reaction area.

The cross section of the photocatalyst filter plate is in a folded plate shape or a wave shape. The photocatalyst filter plate is a composite material of an aluminum alloy honeycomb plate layer and a non-woven fabric layer, the surface of the photocatalyst filter plate is coated with nano titanium dioxide particles to form the photocatalyst filter plate, the aluminum alloy honeycomb plate layer mainly provides the bending forming rigidity of the filter plate, and the non-woven fabric layer has a smaller grid structure and can fully react filtered waste gas. The folded plate-shaped or wave-shaped filter plate can greatly increase the surface reaction area of the photocatalyst and can improve the reaction rate of the photocatalyst.

The adsorption module is an activated carbon adsorption tower, the air inlet is positioned at the bottom, and the air outlet is positioned at the top of the tower. The active carbon adsorption layer in the adsorption tower can adsorb residual acid mist, toxic organic particles, dioxin and the like.

The advantages of the utility model are as follows:

(1) the method is specially used for treating the waste gas generated by preparing the graphene from the phenolic resin, organic volatile gases such as carbon monoxide, carbon dioxide, methane, ethylene, acetylene, benzene, toluene, CnHm alkane olefins, dimethylamine, formaldehyde, formic acid and the like in the waste gas generated by thermally cracking the phenolic resin to produce the graphene, and organic pollutants such as a large amount of carbon particles and a small amount of dioxin overflowing along with a gas phase, so that the finally discharged waste gas generated by producing the graphene reaches the emission standard.

(2) The treatment equipment has the advantages of compact structure, high treatment efficiency and small occupied area.

(3) The multi-stage runway plate type electrostatic trapping module has the effect of greatly enhancing adsorption in a limited space.

(4) The photocatalyst filtering module has the effects of large photocatalyst reaction surface area and uniform gas flow per unit area.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a three-stage spray module;

FIG. 3 is a schematic structural diagram of an electrostatic trapping module;

FIG. 4 is a schematic top view of the adsorption region of the electrostatic trapping module;

FIG. 5 is a schematic view of a structure of a photocatalyst filtering module;

FIG. 6 is a schematic view of the structure of an adsorption module;

the reference numbers in the figures illustrate: 1-three stages of spraying modules; 11-an absorbent replenishment tank; 2-an electrostatic trapping module; 21-electrode column; 22-a diversion air duct; 3-a photocatalyst filtering module; 31-diverging fan blades; 32-a wind deflector; 33-an ultraviolet lamp; 34-a photocatalyst filter plate; 4-adsorption module.

Detailed Description

Example 1

The integrated waste gas treatment equipment special for graphene preparation comprises four modules, namely a three-level spraying module 1, an electrostatic trapping module 2, a photocatalyst filtering module 3 and an adsorption module 4, wherein an induced draft fan is arranged at an inlet of each module to provide power;

a liquid outlet pipe of the recovery tank below the third-stage spraying module 1 is connected with a spraying pipeline of the spraying tower, and an absorption liquid supplementing tank 11 connected with the spraying pipeline is arranged at the liquid outlet pipe;

the electrostatic trapping module 2 is a multistage trap and is divided into a plurality of trapping areas, and an air inlet and an air outlet between each area are connected end to end;

each adsorption area of the electrostatic trapping module 2 is provided with a multi-stage runway type diversion air duct 22, and a gathering tank is arranged below the air duct;

the air inlet of the photocatalyst filtering module 3 is arranged at the top and is provided with a dispersing fan blade 31, and a plurality of ultraviolet lamps 33 and a plurality of layers of photocatalyst filtering plates 34 are arranged on the inner side wall of the shell below an air deflector 32 which is arranged in a dispersing way below the dispersing fan blade;

the section of the photocatalyst filter plate 34 is in a folded plate shape or a wave shape;

the adsorption module 4 is an activated carbon adsorption tower, an air inlet is positioned at the bottom, and an air outlet is positioned at the top of the tower.

Claims (5)

1. Special integrated exhaust-gas treatment equipment of graphite alkene preparation, its characterized in that, equipment includes four modules: the device comprises a three-stage spraying module (1), an electrostatic trapping module (2), a photocatalyst filtering module (3) and an adsorption module (4), wherein an induced draft fan is arranged at the inlet of each module device to provide power;

the electrostatic trapping module (2) is a multistage trap and is divided into a plurality of trapping areas, an air inlet and an air outlet between every two trapping areas are connected end to end, each trapping area is provided with a multistage runway type diversion air duct (22), and a gathering groove is arranged below the air duct.

2. The special integrated waste gas treatment equipment for graphene preparation according to claim 1, characterized in that: the liquid outlet pipe of the recovery tank below the three-stage spraying module (1) is connected with the spraying pipeline of the spraying tower, and the liquid outlet pipe is provided with an absorption liquid supplementing tank (11) connected with the spraying pipeline.

3. The special integrated waste gas treatment equipment for graphene preparation according to claim 1, characterized in that: the air inlet of the photocatalyst filtering module (3) is arranged at the top and is provided with a dispersing fan blade (31), the lower part of the photocatalyst filtering module is a dispersing air deflector (32), and a plurality of ultraviolet lamps (33) and a plurality of layers of photocatalyst filtering plates (34) are arranged on the inner side wall of the shell body below the photocatalyst filtering module.

4. The special integrated waste gas treatment equipment for preparing graphene according to claim 3, characterized in that: the section of the photocatalyst filter plate (34) is in a folded plate shape or a wave shape.

5. The special integrated waste gas treatment equipment for graphene preparation according to claim 1, characterized in that: the adsorption module (4) is an activated carbon adsorption tower, the air inlet is positioned at the bottom, and the air outlet is positioned at the top of the tower.

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