CN212467654U

CN212467654U - Organic waste gas device is handled in cooperation of active carbon to low temperature plasma

Info

Publication number: CN212467654U
Application number: CN202021822730.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing Sanjiancao Technology Co ltd
Current assignee: Chongqing Sanjiancao Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-02-05
Anticipated expiration: 2030-08-27

Abstract

The invention belongs to the field of waste gas purification, and relates to a device for treating organic waste gas by using low-temperature plasma and activated carbon. The device for treating the organic waste gas by the low-temperature plasma and the activated carbon comprises a device box body and a low-temperature plasma and activated carbon adsorption unit; the treatment unit is arranged in the waste gas treatment device in a multi-unit series connection and multi-layer parallel connection combination mode. The invention can improve the adsorption capacity of the active carbon, prolong the adsorption life of the active carbon, effectively remove organic waste gas and solve the problems of high energy consumption and secondary pollution of excessive O3 to the environment of the traditional low-temperature plasma waste gas purification device.

Description

Organic waste gas device is handled in cooperation of active carbon to low temperature plasma

Technical Field

The invention belongs to the field of waste gas purification, and relates to a device for treating organic waste gas by using low-temperature plasma and activated carbon.

Background

In industrial production, activated carbon adsorption or plasma treatment is often used as a main treatment method for treating organic waste gases (VOCs). The organic waste gas is not only a gas which pollutes the environment, but also can cause symptoms of dizziness, nausea, syncope and the like when being inhaled into human bodies, and even causes life danger after being inhaled for a long time.

The existing activated carbon adsorption method is suitable for treating low-concentration organic waste gas, a large amount of activated carbon is needed to adsorb pollutants, the adsorption capacity is weakened along with the increase of the activated carbon adsorption saturation, and the waste gas treatment effect is reduced. The plasma treatment method is easy to generate high-concentration ozone (O3) when treating organic waste gas, and people inhale O3 for a long time, which is easy to cause difficulty in breathing and reduction of lung function, and is easy to cause secondary pollution to the atmospheric environment.

Disclosure of Invention

In view of this, the present invention aims to: aiming at the defects of the existing waste gas treatment device, the device for treating the organic waste gas by the cooperation of the low-temperature plasma and the activated carbon has the characteristics of low energy consumption, high treatment efficiency, simple and convenient maintenance, simple structure and the like, and can effectively reduce the consumption of the activated carbon, prolong the adsorption life of the activated carbon and reduce the waste gas treatment cost.

The invention adopts the following principle: by adopting a low-temperature plasma technology, the high-energy active particles are formed by generating discharge under the action of corona (or dielectric barrier) discharge and breaking down air, and the active particles can collide with organic molecules and are oxidized to generate water and CO2 so as to achieve the effect of removing organic pollutants.

The technical scheme adopted by the invention is as follows: a low-temperature plasma-activated carbon synergistic treatment unit is serially connected in a box body of the waste gas treatment device, and the unit comprises a plasma generation area and an activated carbon adsorption area, wherein the plasma generation area consists of dense-pore toothed electrode plates, dense-pore dielectric barrier electrode plates in an arrangement mode; the unit adopts 7-14 KV high-voltage alternating current as a power supply; the dense pore toothed electrode plate and the dense pore dielectric barrier electrode plate are beneficial to the passing of waste gas and have good supporting effect; the active carbon adsorption area is positioned between the two low-temperature plasma generation areas; the low-temperature plasma generation area is used as a main functional part of the waste gas treatment device; the active carbon adsorption zone mainly functions to adsorb exhaust gas that has not been treated due to a short residence time.

The specific waste gas degradation process comprises the following steps:

(1) organic pollutant molecules in the waste gas enter a low-temperature plasma generation area, a large number of high-energy particles are generated through corona dielectric barrier discharge, the high-energy particles collide with organic matter molecules in the waste gas, the organic pollutant molecules are oxidized into CO2 and H2O, and the organic pollutants are not completely degraded due to short retention time;

(2) the residual organic pollutants pass through the low-temperature plasma generation area and are adsorbed by the activated carbon, and a small amount of unadsorbed organic pollutants continuously enter the next low-temperature plasma generation area along with the waste gas to be oxidized and degraded;

(3) one part of organic pollutant molecules adsorbed on the pore surfaces of the activated carbon are blown away by the waste gas, one part of the organic pollutant molecules collide with high-energy particles carried in the waste gas and generated by a low-temperature plasma generation area to be degraded, and other organic pollutant molecules are continuously adsorbed in the activated carbon;

(4) as organic pollutant molecules carried in the waste gas pass through the low-temperature plasma synergistic active carbon adsorption unit layer by layer, the organic pollutant molecules are less and less until the organic pollutant molecules are completely degraded;

(5) when the concentration of the organic pollutants in the waste gas is low, the excessive high-energy particles are carried by the waste gas to impact the organic pollutants adsorbed in the pores of the activated carbon, and partial regeneration of the adsorption capacity of the activated carbon is completed.

Alternatively, the units can be horizontally arranged in a plurality of units and arranged in a plurality of layers up and down in the device.

Alternatively, the electrode distance and the voltage can be optimized through scientific calculation according to the organic content of the waste gas.

The invention has the beneficial effects that: the invention can effectively treat the waste gas with high concentration or uneven concentration and discharge the waste gas up to the standard, reduces the consumption of the active carbon of a device for treating the waste gas by using single active carbon adsorption, prolongs the adsorption life of the active carbon, is convenient to overhaul and maintain, and can effectively reduce the energy consumption for treating the waste gas.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

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

Referring to fig. 1, the reference numerals in the drawings denote: 1-air inlet, 2-air outlet, 3-dense pore toothed electrode plate, 4-dense pore dielectric barrier electrode plate, 5-low temperature plasma generation area, 6-active carbon adsorption area, 7-waste gas treatment device box, 8-unit lower cover plate and 9-unit upper cover plate.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

The invention relates to a device for treating organic waste gas by low-temperature plasma and activated carbon, which specifically comprises a low-temperature plasma and activated carbon adsorption unit consisting of a 5-low-temperature plasma generation area and a 6-activated carbon adsorption area, and a 7-waste gas treatment device box body.

The low-temperature plasma synergistic activated carbon adsorption unit comprises a 3-dense pore toothed electrode plate, a 4-dense pore dielectric barrier electrode plate, an 8-unit lower cover plate and a 9-unit upper cover plate, and is used for degrading and adsorbing organic pollutants in waste gas.

The 5-low temperature plasma generation area consists of a 3-dense pore dentate electrode plate and a 4-dense pore dielectric barrier electrode plate, is used for generating high-energy particles, and collides with organic pollutant molecules to generate an oxidation-reduction reaction; the 3-dense pore dentate electrode plate and the 4-dense pore dielectric barrier electrode plate are arranged in parallel, and the relative distance is 8-16 mm; the 5-low temperature plasma generation region adopts 7-14 KV high-voltage alternating current to perform corona dielectric barrier discharge, and two electrode plates are connected to the 5-low temperature plasma generation region through an 8-unit lower cover plate and a 9-unit upper cover plate respectively for discharge; the 6-activated carbon adsorption zone is used for adding activated carbon to adsorb undegraded organic pollutants in the waste gas.

In the using process of the invention, organic waste gas enters a low-temperature plasma generating area 5 through an air inlet 1, and residual pollutants after the oxidation and the reduction of low-temperature plasma enter an activated carbon adsorption area 6 and then enter the low-temperature plasma generating area; the degradation-adsorption-degradation of the pollutants is repeated in this way until the pollutants are completely degraded into CO2 and H2O.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The device is characterized in that low-temperature plasma and active carbon adsorption units are vertically arranged in a box in series, the low-temperature plasma and active carbon adsorption units are one layer or multiple layers, waste gas horizontally enters the box, and purification is completed through the low-temperature plasma and active carbon adsorption units.

2. The device for treating organic waste gas by low-temperature plasma and activated carbon according to claim 1, wherein the low-temperature plasma generation region of the low-temperature plasma and activated carbon adsorption unit consists of dense-pore toothed electrode plates and dense-pore dielectric barrier electrode plates;

the dense-pore toothed electrode plate and the dense-pore dielectric barrier electrode plate can pass a large amount of waste gas and have strong bearing capacity;

the dense pore dielectric barrier electrode plate is made of ceramic or polytetrafluoroethylene insulating materials by wrapping a porous metal mesh with good electric conductivity;

the dense pore toothed electrode plate and the dense pore dielectric barrier electrode plate are arranged in parallel, and the relative distance is 8-16 mm;

the low-temperature plasma generation area adopts 7-14 KV high-voltage alternating current to perform a corona dielectric barrier discharge mode, and two electrode plates are connected to the low-temperature plasma generation area through cover plates with conductive upper and lower ends respectively for discharge.

3. The apparatus of claim 1, wherein the low temperature plasma and activated carbon adsorption unit has a low temperature plasma generation region at both sides and an activated carbon adsorption region at the middle, and activated carbon can be added or replaced by opening the upper cover plate.

4. The apparatus of claim 1, wherein the low temperature plasma and activated carbon adsorption unit can be repaired or replaced by installing at the left, right, upper and lower doors of the waste gas treatment apparatus.

5. The device for treating organic waste gas by low-temperature plasma and activated carbon according to claim 1, wherein an insulating ceramic is arranged between the shell and the low-temperature plasma and activated carbon adsorption unit, and the shell and the low-temperature plasma and activated carbon adsorption unit are flexibly connected and arranged by damping insulating rubber.