CN108283870A - A kind of plasma exhaust gas Integrated Processing Unit - Google Patents

Abstract

The invention discloses a plasma waste gas comprehensive treatment device, which comprises an insulating shell, a base, and a tungsten wire wire. The base is fixedly connected with the insulating shell, and the base is provided with a water outlet. The air port, the middle part of the inner cavity of the insulating shell is fixed with a filter device, the filter device includes electrodes, separators, ground electrodes and low-voltage power supply, the electrodes and ground electrodes are electrically connected to the low-voltage power supply through wires, and the motor There is a gap with the grounding electrode, and the motor and the grounding electrode are arranged at intervals. The top and bottom ends of the motor and the grounding electrode are fixed with partitions, and the partitions are fixed on the inner wall of the insulating shell. The exhaust gas comprehensive treatment system designed with the automatic cleaning electrode of the present invention has simple structure, convenient operation, and can realize automatic cleaning.

Description

A comprehensive treatment device for plasma waste gas

technical field

The invention relates to the technical field of exhaust gas treatment, in particular to an automatic cleaning device for gas discharge plasma exhaust gas treatment.

Background technique

With the deepening of the level of social industrialization, various types of pollution including solids, water and air will inevitably be produced. Among them, the generation of waste gas pollution is mainly produced with the development of heavy industry, because the waste gas usually contains a large amount of volatile organic compounds such as VOCs, benzene series, fluoride, halocarbon compounds, sulfur dioxide, nitrogen oxides, dioxins, etc. Toxic and harmful gases, particulate matter, etc., it is particularly important to alleviate the pressure on environmental protection to find a method with high feasibility and no secondary pollution to deal with the above-mentioned organic pollutants.

Traditionally, the combustion method is the most effective method for treating such gases. However, due to the approval of government gas pipelines and the risk of fire hazards, there have been examples of switching to the electrothermal method; however, the electrothermal method is not easy to control due to the operating temperature and flow field distribution. Generally, the efficiency of treating gases such as CF ₄ is extremely low. Whether it is using combustion or electrothermal waste gas treatment devices to decompose waste gases containing fluorinated compounds or perfluorinated compounds, high temperatures and large amounts of waste gas will be generated during the process. dust and acid gas, so the waste gas treatment device is usually equipped with sprinkler equipment for cooling and washing, it is difficult to meet the strict requirements of industrial waste gas emission, and dust needs to be removed manually.

Plasma is the fourth state of matter after solid state, liquid state, and gas state. When the applied voltage reaches the discharge voltage of the gas, the gas is broken down to produce a mixture including electrons, various ions, atoms, and free radicals. Although the temperature of electrons is high during the discharge process, the temperature of heavy particles is very low, and the whole system presents a low-temperature state, so it is called low-temperature plasma. Low-temperature plasma degrades pollutants by utilizing the action of these high-energy electrons, free radicals and other active particles and pollutants in the exhaust gas to decompose the pollutant molecules in a very short period of time, reduce the toxicity of exhaust gas through rich redox reactions, and remove other pollutants. At the same time, it has a very good sterilizing effect.

To sum up, the existing devices all have similar deficiencies respectively. A variety of plasma exhaust gas technologies are disclosed in Chinese patents, such as the patent application number: 200980135309.9 discloses a "plasma treatment method and equipment", the structure of the plasma technology disclosed in this patent application is quite complicated, and it is not suitable Operation, can not achieve the effect of automatic cleaning.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to propose a comprehensive waste gas treatment system designed to automatically clean electrodes, which can treat various toxic substances such as particulate matter in the waste gas, and can also play a role in cleaning the electrodes.

Technical scheme of the present invention is:

A comprehensive treatment device for plasma waste gas, comprising an insulating shell, a base, and tungsten wires, the base is fixedly connected to the insulating shell, and the base is provided with a water outlet, and the top of the insulating shell is provided with an air inlet. A filtering device is fixed in the middle of the inner cavity of the insulating shell, and the filtering device includes an electrode, a separator, a grounding electrode and a low-voltage power supply, the electrodes are electrically connected to the low-voltage power supply, and the grounding electrode is electrically connected to the negative pole of the low-voltage power supply. The electrode and the ground electrode are provided with a gap, and the electrode and the ground electrode are arranged at intervals, and the top and bottom ends of the electrode and the ground electrode are fixed with partitions, and the partition is fixed on the inner wall of the insulating shell;

A waste gas treatment device is arranged below the filter device, and the waste gas treatment device is fixed in the inner cavity of the insulating shell. The waste gas treatment device includes a high-voltage electrode, a separator, ceramics, a high-voltage wire and a high-voltage power supply. There is also a gap between the two high-voltage electrodes, and the high-voltage electrodes are electrically connected to the high-voltage power supply through high-voltage wires. The top of the high-voltage electrodes is fixed with a partition, and the bottom of the high-voltage electrodes is fixed with ceramics. The partitions and ceramics are fixed on the on the inner wall of the insulating enclosure;

An automatic dust removal device is provided between the filter device and the exhaust gas treatment device, the automatic dust removal device includes a motor, a connecting rod and an eccentric wheel, the motor is fixed on the outer wall of the insulating shell, and the drive shaft of the motor passes through the insulating shell and Extending into the inner cavity of the insulating shell, the end of the drive shaft of the motor is fixedly connected with an eccentric wheel, and the eccentric wheel is fixedly connected with a connecting rod;

An air outlet and a water inlet are opened on the lower side wall of the exhaust gas treatment device of the insulating shell, and a water pump is connected to the water inlet.

Preferably, a timing controller is fixed on the outer wall of the insulating casing, and the timing controller is electrically connected to the water pump and the motor respectively.

Preferably, the water inlet is provided with a solenoid valve, and the solenoid valve is electrically connected to a timing controller.

Preferably, the low-voltage power supply is electrically connected to a second timing switch, and the second timing switch is fixed on the insulating casing.

Preferably, the high-voltage power supply is electrically connected to a first timing switch through a high-voltage wire, and the first timing switch is fixed on the insulating casing.

Preferably, a tungsten wire is provided inside the filtering device, the surface of the tungsten wire is gold-plated, and the tungsten wire is fixed on the inner wall of the insulating shell.

Preferably, a tapered groove is formed on the upper part of the inner cavity of the base, and the water outlet is arranged at the bottom of the tapered groove.

Preferably, the separator is made of insulating material.

Preferably, nanometer anti-corrosion and anti-oxidation coatings are used on the surface of the connecting rod.

Preferably, the gap between the two adjacent high-voltage electrodes is 0.3-0.6 cm, and the gap between the motor and the ground electrode is 1-1.5 cm.

Compared with the prior art, the present invention has the following beneficial technical effects:

1. The present invention provides a comprehensive treatment device for plasma waste gas, an advanced waste gas filter device, dielectric barrier discharge, a large increase in plasma concentration, a large amount of static charge, which can adsorb solid particles in waste gas, and is more efficient than activated carbon and other adsorption materials. Increased by 80%-85%, it can also implement toxic and harmful substances including volatile organic compounds VOCs, benzene series, fluorides, halocarbons, sulfur dioxide, nitrogen oxides, dioxins, etc. in the exhaust gas preprocessing.

2. The present invention provides a comprehensive treatment device for plasma waste gas. In the waste gas treatment device, under the action of an external power supply, the high-voltage electrode performs plasma discharge, and under the action of high-energy electrons, the odor molecules are excited, and the charged particles or The chemical bonds between molecules are broken, and the water and oxygen in the air will also produce strong oxidizing substances such as OH free radicals and active oxygen under the bombardment of high-energy electrons. These strong oxidizing substances will also react with odor molecules to decompose them , thereby promoting the elimination of odor.

3. The present invention provides a comprehensive treatment device for plasma waste gas. The automatic cleaning device can automatically process the waste on the electrode, which can save 60%-70% of manpower and material resources.

4. The present invention provides a plasma waste gas comprehensive treatment device, which has a simple and reasonable structure, simple and convenient operation, 40% reduction in facility investment, 50% reduction in manufacturing costs, and a waste gas treatment rate of 90%-98%, which can be widely used in small occasions Exhaust gas treatment and high altitude areas.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Figure 1 is a schematic diagram of the overall structure of a plasma waste gas comprehensive treatment device proposed by the present invention when it is laid down;

Fig. 2 is a schematic structural diagram of a waste gas treatment device in a plasma waste gas comprehensive treatment device proposed by the present invention;

Fig. 3 is a structural schematic diagram of a filter device in a plasma waste gas comprehensive treatment device proposed by the present invention;

Fig. 4 is a schematic structural diagram of an automatic dust removal device of a plasma waste gas comprehensive treatment device proposed by the present invention.

In the figure: 1-insulated shell, 2-air inlet, 3-air outlet, 4-water inlet, 5-water outlet, 6-motor, 7-high voltage electrode, 8-electrode, 9-base, 10-timing control Device, 11-partition plate, 12-ceramic, 13-gap, 14-high voltage wire, 15-connecting rod, 16-ground electrode, 17-tungsten wire, 18-high voltage power supply, 19-first timing switch, 20- Low-voltage power supply, 21-second timing switch.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense unless otherwise clearly specified and limited, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Referring to Figures 1-4, a plasma waste gas comprehensive treatment device includes an insulating shell 1, a base 9, and a tungsten wire 17, the base 9 is fixedly connected to the insulating shell 1, and the base 9 is provided with a water outlet 5, the base 9 There is a conical groove on the upper part of the inner cavity, the water outlet 5 is arranged at the bottom of the conical groove, the top of the insulating shell 1 is provided with an air inlet 2, and the middle part of the inner cavity of the insulating shell 1 is fixed with a filter device. Including electrode 8, separator 11, grounding electrode 16 and low-voltage power supply 20, electrode 8 is electrically connected to the positive pole of low-voltage power supply 20 through wires, grounding electrode 16 is connected to the negative pole of low-voltage power supply 20, electrode 8 and grounding electrode 16 are provided with gap 13, electrode 8 and the ground electrode 16 are arranged according to "electrode-ground electrode-electrode". The top and bottom ends of the electrode 8 and the ground electrode 16 are fixed with a partition 11, and the partition 11 is fixed on the inner wall of the insulating shell 1. The ground electrode 16 can increase the adsorption area. The inside of the filter device is provided with a tungsten wire wire 17. The surface of the tungsten wire wire 17 is gold-plated, and the tungsten wire wire 17 is fixed on the inner wall of the insulating shell 1. The positive pole of the low-voltage power supply 20 is connected with the tungsten wire wire 17. The silk wire 17 and the ground electrode 16 form a line-plate discharge, which generates static electricity to adsorb particles, and also prevents the oxidation and corrosion of the electrode 8 .

A waste gas treatment device is arranged below the filter device, and the waste gas treatment device is fixed in the inner cavity of the insulating shell 1. The waste gas treatment device includes a high-voltage electrode 7, a separator 11, a ceramic 12, a high-voltage wire 14 and a high-voltage power supply 18. Two adjacent high-voltage Also be provided with gap 13 between electrodes 7, and high-voltage electrode 7 is electrically connected with high-voltage power supply 18 by high-voltage wire 14, and separator 11 is fixed on the top of high-voltage electrode 7, and pottery 12 is fixed on the bottom of high-voltage electrode 7, and separator 11 and The ceramics 12 are all fixed on the inner wall of the insulating shell 1, and the grounding of the high-voltage electrode 7 can be realized through the insulating shell 1;

An automatic dust removal device is provided between the filter device and the exhaust gas treatment device. The automatic dust removal device includes a motor 6, a connecting rod 15 and an eccentric wheel. The motor 6 is fixed on the outer wall of the insulating casing 1, and the transmission shaft of the motor 6 passes through the insulating casing 1 and Stretch into the inner cavity of the insulating shell 1, the end of the transmission shaft of the motor 6 is fixedly connected with an eccentric wheel, the eccentric wheel is fixedly connected with a connecting rod 15, and the motor 6 drives the eccentric wheel to rotate to realize the eccentric rotation of the connecting rod 15, and then Drive the whole frame to vibrate;

An air outlet 3 and a water inlet 4 are opened on the side wall below the exhaust gas treatment device of the insulating shell 1, and a water pump is connected to the water inlet 4, and a timing controller 10 is fixed on the outer wall of the insulating shell 1, and the timing controller 10 adopts KG316T Model, timing controller 10 is electrically connected with water pump and motor 6 respectively, and timing controller 10 can be controlled by the thickness of the particle on the pattern recognition electrode plate (pattern recognition particle thickness belongs to the prior art, no longer repeats it here), carry out Water outlet 4 is provided with electromagnetic valve, and electromagnetic valve is electrically connected with timing controller 10, can realize timing control to motor 6, water pump and battery valve by timing controller 10.

The low-voltage power supply 20 is electrically connected with a second timing switch 21. The second timing switch 21 adopts an automatic power-off type 86 type and is fixed on the insulating shell 1. The low-voltage power supply 20 is below 5000V.

The high-voltage power supply 18 is electrically connected with a first timing switch 19 through a high-voltage wire 14. The first timing switch 19 adopts an automatic power-off type 86 type and is fixed on the insulating shell 1. The high-voltage power supply 18 is above 5000V.

The separator 11 is made of insulating material, and what is used in this embodiment is polytetrafluoroethylene.

The surface of the connecting rod 15 adopts nanometer anti-corrosion and anti-oxidation paint, and the paint selected in this embodiment is the anti-corrosion, anti-oxidation and high temperature resistant paint of Beijing Zhisheng Weihua.

The gap 13 of the high-voltage electrode 7 is much smaller than the gap 13 of the electrode 8 and the ground electrode 16. In the present embodiment, the gap 13 of the high-voltage electrode 7 is 0.5 cm, and the gap 13 of the electrode 8 and the ground electrode 16 is 1 cm, so that there are more high-voltage electrodes 7 , The denser, the more electrodes the better.

Embodiment or work flow: use two timing switches to respectively set the working hours of the waste gas treatment device and the filtering device, set the time when the motor 6 of the dust removal device works and the valve of the water pump is opened with the timing controller 10, and the motor 6 and the water pump start simultaneously. The water pump works for 5-10 minutes longer than the motor; the waste gas treatment device and filter device work, the waste gas enters through the air inlet 2, reaches the filter device, and generates electrostatic charges through discharge, so that the particles in the waste gas are adsorbed on the grounding electrode 16, Eliminate a small amount of gaseous organic matter, and then the exhaust gas enters the exhaust gas treatment device, and eliminates harmful substances in the exhaust gas such as sulfur dioxide, nitrogen oxides, O3 _, etc. through plasma discharge, and the gas is discharged through the gas outlet 3, and the exhaust gas treatment device and filter device stop working , the timing controller controls the motor 6 and the water pump to work, and opens the solenoid valve, the motor 6 drives the connecting rod 15 to rotate eccentrically through the eccentric wheel, and then drives the whole device to vibrate, shaking off the dust on the electrode 8 and the high-voltage electrode 7 to make it fall to the base In the tapered groove of 9, the water pump flushes the base 9 dust through the water inlet 4, and flows out from the water outlet 5, then the water pump and the motor 6 stop working; the exhaust gas treatment device and the filtering device work again, and the cycle is repeated.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (10)

1. A plasma waste gas comprehensive treatment device, comprising an insulating shell, a base, and a tungsten wire wire, the base is fixedly connected to the insulating shell, and the base is provided with a water outlet, and the top of the insulating shell has an air inlet , characterized in that: a filter device is fixed in the middle of the inner cavity of the insulating shell, and the filter device includes an electrode, a separator, a grounding electrode and a low-voltage power supply, and the electrodes and the grounding electrode are electrically connected to the low-voltage power supply through wires, so that The electrodes and the ground electrodes are provided with a gap, and the electrodes and the ground electrodes are arranged at intervals, and the top and bottom ends of the electrodes and the ground electrodes are fixed with partitions, and the partitions are fixed on the inner wall of the insulating shell; A waste gas treatment device is arranged below the filter device, and the waste gas treatment device is fixed in the inner cavity of the insulating shell. The waste gas treatment device includes a high-voltage electrode, a separator, ceramics, a high-voltage wire and a high-voltage power supply. There is also a gap between the two high-voltage electrodes, and the high-voltage electrodes are electrically connected to the high-voltage power supply through high-voltage wires. The top of the high-voltage electrodes is fixed with a partition, and the bottom of the high-voltage electrodes is fixed with ceramics. The partitions and ceramics are fixed on the on the inner wall of the insulating enclosure; An automatic dust removal device is provided between the filter device and the exhaust gas treatment device, the automatic dust removal device includes a motor, a connecting rod and an eccentric wheel, the motor is fixed on the outer wall of the insulating shell, and the drive shaft of the motor passes through the insulating shell and Extending into the inner cavity of the insulating shell, the end of the drive shaft of the motor is fixedly connected with an eccentric wheel, and the eccentric wheel is fixedly connected with a connecting rod; An air outlet and a water inlet are opened on the lower side wall of the exhaust gas treatment device of the insulating shell, and a water pump is connected to the water inlet. 2. A comprehensive treatment device for plasma waste gas according to claim 1, characterized in that: a timing controller is fixed on the outer wall of the insulating casing, and the timing controller is electrically connected to the water pump and the motor respectively. 3. A plasma waste gas comprehensive treatment device according to claim 2, characterized in that: the water inlet is provided with a solenoid valve, and the solenoid valve is electrically connected to a timing controller. 4 . The comprehensive treatment device for plasma waste gas according to claim 1 , wherein the low-voltage power supply is electrically connected to a second timing switch, and the second timing switch is fixed on an insulating casing. 5 . The comprehensive treatment device for plasma waste gas according to claim 1 , wherein the high-voltage power supply is electrically connected to a first timing switch through a high-voltage wire, and the first timing switch is fixed on an insulating casing. 6 . 6. A comprehensive treatment device for plasma waste gas according to claim 1, characterized in that: the inside of the filter device is provided with a tungsten wire, the surface of the tungsten wire is gold-plated, and the tungsten wire is fixed on the insulating shell on the inner wall. 7. A comprehensive treatment device for plasma waste gas according to claim 1, characterized in that: the upper part of the inner cavity of the base is provided with a conical groove, and the water outlet is arranged at the bottom of the conical groove. 8 . The plasma waste gas comprehensive treatment device according to claim 1 , wherein the separator is made of insulating material. 8 . 9. A comprehensive treatment device for plasma waste gas according to claim 1, characterized in that: the surface of the connecting rod is made of nanometer anti-corrosion and anti-oxidation paint. 10. A comprehensive treatment device for plasma waste gas according to claim 1, characterized in that: the gap between the two adjacent high-voltage electrodes is 0.3-0.6 cm, and the gap between the motor and the ground electrode is 1- 1.5cm.