1. The utility model provides a direct formula of admitting air rotatory slip arc plasma diesel engine tail gas processing apparatus, includes the cavity cylinder, and the cavity cylinder sets up high voltage electrode, its characterized in that as ground electrode in the cavity cylinder: the outside high voltage power supply module that sets up of cavity cylinder, the notch is seted up to the one end of cavity cylinder, sets up insulating gasket in the notch, cavity cylinder inside cooperation insulating gasket set up the swirler, the below of swirler is connected on high voltage electrode, the swirler include connector, center pin and a plurality of guide vane, guide vane sets up inside the connector, and all connect on the center pin, high voltage electrode set up to the toper, conical major part is connected on the center pin, the connector outside glue in insulating gasket's inboard.

2. The straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device according to claim 1, characterized in that: the high-voltage electrode comprises a welding port, a conical electrode and an electrode front end closing-in, wherein the welding port is arranged on the big end of the conical electrode, and the welding port is welded with the end part of the central shaft.

3. The straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device according to claim 1, characterized in that: the insulating gasket is set to be a ceramic insulating gasket, the height of the insulating gasket is higher than the depth of the notch, and the insulating gasket is exposed out of the notch by 3-8 mm.

4. The straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device according to claim 1, characterized in that: the guide vanes are arranged at most five, and the rotating angle of the guide vanes is gradually reduced along with the increase of the number.

5. The straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device according to claim 4, characterized in that: five guide vanes are arranged, and the rotation angle of each guide vane is 72 degrees.

6. The straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device according to claim 1, characterized in that: the cyclone and the high-voltage electrode are made of stainless steel.

Background

The tail gas of the diesel engine is the tail gas sprayed by the diesel engine after burning diesel, the tail gas contains hundreds of different compounds, the gas emission is not only strange in smell, but also is dizziness and nausea, and influences the health of people, and experts in the world health organization consider that the tail gas of the diesel engine is the same as substances such as asbestos, arsenic and the like, and has high carcinogenicity.

In 2017, 10 and 27, the list of carcinogens published by the international cancer research institution of the world health organization is preliminarily collated for reference, and the exhaust of a diesel engine is in the list of carcinogens.

Diesel vehicles currently account for less than 10% of motor vehicles in China, but the pollution caused by the diesel vehicles is far more than that of other types of motor vehicles, the tail gas of the diesel engine contains hundreds of different compounds, the pollutants comprise solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, sulfur oxides and the like, and the tail gas can directly harm the health of human bodies and can generate far-reaching influence on the living environment of human beings, such as acid rain, greenhouse effect and the like, thereby bringing about extremely serious challenge to the survival of human beings.

At present, the prior measures for purifying the tail gas of the diesel engine are mainly divided into two modes of internal purification and external purification, wherein the internal purification improves the combustion quality and reduces the harmful substances of the tail gas by modulating an engine, but simultaneously reduces the power performance of the diesel engine and improves the cost, and the more and more severe emission standard is difficult to achieve.

The current common methods are divided into two types, namely a pretreatment technology and a post-treatment technology, the current widely applied method is the post-treatment technology, and the post-treatment technology is divided into three main methods: DOC system, SCR system and PDF system which are respectively corresponding to different components in tail gas and are respectively used for heating CO and O₂Oxidation reaction to produce CO₂And H₂O, but its treated surface is single; the SCR system utilizes the injection of ammonia gas to react with nitrogen oxidesGenerating N by the reaction of the raw reduction₂And H₂O, but the hidden trouble of ammonia gas leakage exists, so that the harm to people can be caused; the PDF system is similar to a filtering system, PM generated in tail gas of a diesel engine can be accumulated on a filter screen along with time to influence exhaust of the diesel engine and power of the diesel engine, and the three post-treatment technologies have the same problem that the single treatment surface cannot remove complex pollutants in the tail gas of the diesel engine at one time.

The plasma is a substance in a fourth state following solid, liquid and gas states, and the system is rich in active ingredients such as high-energy electrons, ions, excited atoms, free radicals and the like, so that the plasma is a novel molecular activation means. The atmospheric pressure low temperature plasma is a non-equilibrium plasma generated by utilizing gas discharge under the condition of open atmospheric pressure, and because the electron temperature in the system is far higher than the temperature of heavy particles, the atmospheric pressure low temperature plasma can obtain higher chemical activity and maintain the gas temperature close to room temperature, and is widely applied to the fields of agriculture, industry, military, environment, communication and the like.

The low-temperature plasma technology has the advantages of high purification efficiency, capability of simultaneously treating various pollutants, no secondary pollution and the like, and attracts people's special attention in the application of the field of tail gas purification, wherein the tail gas is treated by the plasma technology mainly by utilizing active particles such as high-energy electrons and free radicals generated by the plasma technology and the action of pollutants in the tail gas, so that pollutant molecules are decomposed in a very short time, and various subsequent reactions are carried out to finally convert the pollutants into CO₂And H₂O and other pollutant-free gases to achieve the purpose of treating tail gas, and at present, partial scholars remove NO in the tail gas of the diesel engine by using low-temperature plasma technology_xThe invention provides a straight-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device, which is used for solving the problems of low temperature plasma, high efficiency, low cost, high efficiency and the like.

Disclosure of Invention

Aiming at the problems, the invention mainly aims to design a direct air inlet type rotating sliding arc plasma diesel engine tail gas treatment device, which mainly solves the three problems:

1. selection problem: can have certain removal rate to various pollutants in the tail gas of the diesel engine;

2. safety problems are as follows: when the device is used for treating the tail gas of the diesel engine, new pollutants or substances harmful to human bodies cannot be introduced;

3. the power problem is as follows: the diesel engine tail gas can not be treated at the cost of sacrificing the power of the diesel engine.

In order to achieve the purpose, the invention adopts the following technical scheme:

a tail gas treatment device of a direct air inlet type rotary sliding arc plasma diesel engine comprises a hollow cylinder body, wherein the hollow cylinder body is used as a ground electrode, and a high-voltage electrode is arranged in the hollow cylinder body.

The outside high voltage power supply module that sets up of cavity cylinder, the notch is seted up to the one end of cavity cylinder, sets up insulating gasket in the notch, cavity cylinder inside cooperation insulating gasket set up the swirler, the below of swirler is connected on high voltage electrode, the swirler include connector, center pin and a plurality of guide vane, guide vane sets up inside the connector, and all connect on the center pin, high voltage electrode set up to the toper, conical major part is connected on the center pin, the connector outside glue in insulating gasket's inboard.

As a further description of the invention, the high-voltage electrode comprises a welding port, a conical electrode and an electrode front end closing-in, wherein the welding port is arranged on the large end of the conical electrode, and the welding port is welded with the end part of the central shaft.

As a further description of the invention, the insulating gasket is arranged as a ceramic insulating gasket, the height of the insulating gasket is higher than the depth of the notch, and the insulating gasket is exposed out of the notch by 3-8 mm.

As a further description of the present invention, the number of the guide vanes is five at most, and the rotation angle of the guide vanes gradually decreases as the number of the guide vanes increases.

As a further description of the present invention, the number of the guide vanes is five, and the rotation angle of the guide vanes is 72 °.

As a further description of the invention, the cyclone and the high-voltage electrode are both made of stainless steel.

Compared with the prior art, the invention has the technical effects that:

the invention provides a direct-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device, which directly uses a storage battery of a diesel engine to provide energy and is directly arranged at the exhaust position of a tail gas pipe, so that the device has higher portability, higher integration and stronger universality; by arranging the cyclone, the rotating sliding arc plasma can be formed under the condition of straight-through air inlet, and the sliding speed and the active particle density of the arc can be automatically switched under the condition of changed airflow, so that the problem of the dynamic change working condition of the actual diesel engine tail gas airflow is solved; the exhaust emission degree of different tail gases can be adjusted by adjusting the magnitude of the input current, so that the exhaust emission degree of the tail gases can be adjusted flexibly and the compatibility is wider; the tail gas of the diesel engine is treated by adopting a rotating sliding arc plasma discharge principle, and the tail gas of the diesel engine can be treated under the condition of not adding any catalyst for concerted catalysis.

Drawings

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is an assembled view of the overall structure of the present invention;

FIG. 3 is a structural view of a swirler of the present invention;

FIG. 4 is an overall frame view of the present invention;

FIG. 5 is a voltage-current waveform diagram of the present invention in an operating state;

FIG. 6 is a graph showing the trend of peak-to-peak voltage and peak-to-peak current as a function of gas flow rate in accordance with the present invention;

FIG. 7 is a view of the emission spectrum data analysis during discharge according to the present invention;

FIG. 8 shows the present invention N₂(0, 0) and N₂(0, 1) a trend graph of spectral intensity with gas flow rate;

FIG. 9 is an image of electroluminescence at different flow rates in accordance with the present invention.

In the figure, 1 is a hollow cylinder, 11 is a high-voltage power supply module, 12 is a notch, 2 is a high-voltage electrode, 21 is a welding port, 22 is a conical electrode, 23 is an electrode front end closing-in, 3 is an insulating gasket, 4 is a swirler, 41 is a connecting body, 42 is a central shaft, and 43 is a guide vane.

Detailed Description

The invention is described in detail below with reference to the attached drawing figures:

a direct air inlet type rotating sliding arc plasma diesel engine tail gas treatment device is shown in a reference figure 1-3 and comprises a hollow cylinder 1, wherein the hollow cylinder 1 is used as a ground electrode, and a high-voltage electrode 2 is arranged in the hollow cylinder 1.

The outside high voltage power supply module 11 that sets up of cavity cylinder 1, notch 12 is seted up to the one end of cavity cylinder 1, sets up insulating gasket 3 in the notch 12, 1 inside cooperation insulating gasket 3 of cavity cylinder set up swirler 4, the below of swirler 4 is connected on high voltage electrode 2, swirler 4 include connector 41, center pin 42 and a plurality of guide vane 43, guide vane 43 sets up inside connector 41, and all connects on center pin 42, high voltage electrode 2 set up to the toper, conical major part is connected on center pin 42, the connector 41 outside glue in insulating gasket 3's inboard.

The technical characteristics included in the present invention are that the insulating spacer 3 is provided to insulate the current rotator 4 from the ground electrode (hollow column 1).

The high-voltage electrode 2 comprises a welding port 21, a conical electrode 22 and an electrode front end closing-in 23, wherein the welding port 21 is arranged on the big end of the conical electrode, and the welding port 21 and the end part of the central shaft 42 are welded together.

The arrangement mode of the high-voltage electrode 2 is disclosed, the conical electrode is arranged so as to be firstly generated at the position with the maximum curvature radius of the conical electrode when the power is on, the closing-in 23 at the front end of the electrode is in an arc-shaped conical shape, and the sliding distance of a plasma arc is lengthened.

The insulating gasket 3 is a ceramic insulating gasket, the height of the insulating gasket 3 is higher than the depth of the notch 12, and the insulating gasket 3 is exposed out of the notch by 3-8 mm.

The above-mentioned setting of disclosing notch 12, notch 12 is convenient for place insulating gasket 3, and insulating gasket 3 has partly to expose outside, and is insulating effectual, prevents to draw the arc outside.

As shown in fig. 3, the number of the guide vanes 43 is five at most, the rotation angle of the guide vanes 43 gradually decreases with the increase of the number, the number of the guide vanes 43 is five, and the rotation angle of the guide vanes 43 is 72 °.

The above disclosure discloses the arrangement of the guide vane 43, the guide vane 43 plays a role in guiding the flow of the intake exhaust gas so as to facilitate the rotation movement of the arc plasma, the smaller the arrangement of the guide vane 43, the higher the rotation angle, but the guide vane 43 cannot be arranged too much, and the rotation of the airflow is affected by too much arrangement.

The cyclone 4 and the high-voltage electrode 2 are both made of stainless steel.

The parameters of the components of the invention are disclosed as follows:

hollow cylinder 1: the inner diameter is 10-30mm, the outer diameter is 20-40mm, the height is 50-100mm, and the electrode is used as a ground electrode;

notch 12: the inner diameter is 10-30mm, the outer diameter is 15-35mm, and the depth is 5-20 mm;

the connecting body 41: the inner diameter is 10-30mm, and the outer diameter is 15-30 mm;

center shaft 42: the diameter is 2-8mm, and the height is 5-20 mm;

the guide vane 43: the height is 5-25 mm;

welding port 21: the diameter is 2-8mm, and the height is 1-5 mm;

tapered electrode 22: the height is 40-70 mm;

the vehicle-mounted storage battery is used for supplying power, the direct current output by the vehicle-mounted storage battery is boosted by the high-voltage power supply module 11 (microsecond pulse power supply module) through the pulse transformer, so that the device disclosed by the invention can be driven to work by voltage, and when the device disclosed by the invention works, the tail gas of the diesel engine enters from the air inlet and is discharged from the tail gas outlet after being processed by the device disclosed by the invention.

When the diesel engine exhaust gas generating device works normally, diesel engine exhaust gas enters from one end of the swirler 4, and forms rotating airflow between the high-voltage electrode 2 and the low-voltage electrode after being guided by the swirler 4, at the moment, the high-voltage power supply module 11 is electrified, electric arcs are generated at the position where the high-voltage electrode 2 is closest to the ground electrode, and rotary electric arc plasma is generated under the propelling of the rotating airflow.

After the treatment is finished, the high-voltage power supply module 11 is closed, and the device is directly sleeved at the tail gas pipe of the diesel engine.

The invention has small volume and simple operation, and greatly improves the timeliness and convenience of tail gas treatment.

The invention provides a direct-through air inlet type rotary sliding arc plasma diesel engine tail gas treatment device, which directly uses a storage battery of a diesel engine to provide energy and is directly arranged at the exhaust position of a tail gas pipe, so that the device has higher portability, higher integration and stronger universality; by arranging the cyclone, the rotating sliding arc plasma can be formed under the condition of straight-through air inlet, and the sliding speed and the active particle density of the arc can be automatically switched under the condition of changed airflow, so that the problem of the dynamic change working condition of the actual diesel engine tail gas airflow is solved; the exhaust emission degree of different tail gases can be adjusted by adjusting the magnitude of the input current, so that the exhaust emission degree of the tail gases can be adjusted flexibly and the compatibility is wider; the tail gas of the diesel engine is treated by adopting a rotating sliding arc plasma discharge principle, and the tail gas of the diesel engine can be treated under the condition of not adding any catalyst for concerted catalysis.

As shown in fig. 5, a voltage and current waveform diagram under an operating state is disclosed, the device provided by the invention can normally perform discharge operation, the input current is 15mA, the mass flow meter is adjusted to enable the gas flow rate to be 8.0L/min, and meanwhile, the mass flow meter is used for adjusting the gas flow rate to be 8.5L/min, 9.0L/min, 9.5L/min and 10.0L/min in sequence, the voltage and current waveform diagram under each condition is obtained by taking the gas flow rate as a variable, and further, a variation trend broken line diagram of the period, the voltage peak value and the current peak value along with the variation of the gas flow rate during the discharge of the rotating sliding arc is obtained, as shown in fig. 6.

It can be seen that the discharge period has a very obvious shortening trend along with the increase of the gas flow rate, the discharge period is 40ms when the gas flow rate is 8.0L/min, the discharge period is reduced to 30ms when the gas flow rate is 9.0L/min, the reduction percentage is 25%, the discharge period is 27ms when the gas flow rate is 10L/min, the reduction percentage is 10%, the period reduction trend is slowed down, but the whole discharge period is shortened along with the increase of the gas flow rate.

It can be seen from the waveforms of the electrical test results disclosed in fig. 5 and 6 that the device provided by the present invention can still work in normal discharge under the conditions of different dynamic exhaust flow rates, and thus, the function of processing the harmful gases in the exhaust gas is completed.

For the harmful substances in the tail gas, the experimental verification of whether the device provided by the invention has the decomposition processing capability needs to analyze the application effect from the optical characteristics, namely, the application effect is analyzed from the emission spectrum intensity and the luminous image during discharge, and when the input current is 15mA and the gas flow rate is 8.0L/min, the emission spectrum data during discharge is measured by using the device provided by the invention, as shown in the following figure 7.

FIG. 7 shows the distribution of the emission spectrum intensity of nitrogen at each wavelength in the second normal system, in which the highest spectrum intensity is N in the second normal system C-B₂Spectral intensity 12140 a.u at (0, 0) 337nm, and then N₂The spectral intensity is 10754 a.u. (0, 1) at 345nm, so that the device provided by the invention can decompose gas molecules into other active particles in the discharge process, so that the gas molecules and tail gas components are subjected to degradation reaction, and the discharge mechanism is theoretically feasible.

Meanwhile, the gas flow rate is adjusted through a mass flow meter to obtain N under a second normal system (C-B)₂Spectral intensity at (0, 0) 337nm and N₂(0, 1) a trend graph of the spectral intensity at 345nm with the flow rate of the gas, from which N in the second normal system (C-B) can be seen as shown in FIG. 8₂Spectral intensity at (0, 0) 337nm and N₂(0, 1) the spectral intensity at 345nm shows a tendency to decrease and then increase with increasing gas flow rate.

Meanwhile, the feasibility experiment of the device provided by the invention is analyzed by combining the shot discharge luminescence image, and fig. 9 is a luminescence image shot by a digital camera when the gas flow rate is sequentially increased from 8.0L/min to 10L/min from left to right when the current is input at 15mA, so that the slide arc discharge luminescence image is brighter as the gas flow rate is increased, and the density of the gas is processed by the density of the rotating slide arc in the discharge process.

When the input current is constant, the gas flow rate is continuously increased, the spectral intensity has the change trend of firstly decreasing and then increasing, the spectral intensity is integrally increased along with the increase of the gas flow rate, and meanwhile, in combination with the discharge luminescence image analysis under different gas flow rates, the gas flow rate is larger, the discharge intensity is larger, the density of generated plasma is also larger, the reaction of the gas and the plasma is more sufficient, and the application effect of the device provided by the invention is better.

Secondly, when the flow rate is constant and the input current is properly increased, the spectral intensity is found to be obviously and continuously increased, and meanwhile, the brightness and the density of a discharge image are also obviously increased along with the increase of the current, so that the increase of the input current can obviously promote the discharge process of the reactor, the discharge effect is stronger, the reaction is more sufficient, and the device can improve the processing effect of the device by adjusting the input power. Therefore, the invention can realize the treatment of pollution sources with different degrees by adjusting the magnitude of the input current and realize the effective treatment of the tail gas of the diesel engine.

The above embodiments are only for illustrating the technical solutions of the present invention and are not limited, and other modifications or equivalent substitutions made by the technical solutions of the present invention by the ordinary skilled person in the art are included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.