CN114130171A - Device for treating particulate matters in ship tail gas by combining plasma with catalysis - Google Patents
Device for treating particulate matters in ship tail gas by combining plasma with catalysis Download PDFInfo
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- CN114130171A CN114130171A CN202111189209.3A CN202111189209A CN114130171A CN 114130171 A CN114130171 A CN 114130171A CN 202111189209 A CN202111189209 A CN 202111189209A CN 114130171 A CN114130171 A CN 114130171A
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- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/40—Electrode constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/743—Cleaning the electrodes by using friction, e.g. by brushes or sliding elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The invention discloses a device for treating particles in ship tail gas by combining plasma with catalysis, which relates to the technology of ship tail gas treatment and mainly comprises an airflow channel, wherein a plurality of positive rods and a plurality of translational negative plates which are positioned on the side surfaces of all the positive rods are arranged in the airflow channel, each negative plate is coated with a V-based catalyst, a heating assembly is arranged on one side, away from the positive rods, of each negative plate in the airflow channel, and meanwhile, a cleaning mechanism for cleaning the particles on the negative plates is arranged in the airflow channel. On one hand, under the action of an electric field, organic matters in the tail gas can be ionized and decomposed, and then removed; on the other hand, particles such as non-combustible sulfate and metal particles in the tail gas can be adsorbed on the negative plate, so that the particles can be conveniently removed, and the tail gas after purification can meet the emission standard.
Description
Technical Field
The invention relates to the field of ship tail gas treatment, in particular to a device for treating particles in ship tail gas by combining plasma with catalysis.
Background
The particulate matter is one of main pollutants in the tail gas of the diesel engine, is a mixture of various substances, mainly comprises soot particles, sulfate particles, metal salt and the like, can adsorb a large amount of organic hydrocarbons on the surface of the particulate matter, and has certain viscosity. Therefore, in the exhaust emission process, air pollution is easily caused, and meanwhile, particles are easily attached to the inner wall of the exhaust emission pipe to influence the normal work of the exhaust emission pipe.
For this reason, chinese patent publication nos. CN109139196A and CN208057194U disclose that filtering and trapping (pure DPF, DPF + DOC, etc.) are performed by a DPF-based method, and after the trapping, electrical heating or oil injection regeneration is performed to remove particulate matter.
The DPF is a ceramic filter body, and although the particulate matter trapping efficiency is high in the tail gas purification of the diesel engine, the size of the DPF is huge, and the DPF is difficult to apply to areas with extremely narrow and narrow space volumes, such as vehicles and ships. In addition, the regeneration device needs to heat the whole DPF ceramic body, so a spare DPF group is generally arranged to ensure that the DPF works at any time. For this reason, when a complete equipment is installed on a ship, a large amount of cost is required and a large amount of space is occupied.
More importantly, the existing DPF regeneration process is mainly based on methods such as combustion, heating and the like, and is basically ineffective for non-combustible sulfate, metal particles and the like, so that the non-combustible sulfate, metal particles and the like are often accumulated on equipment and cannot be removed in time, the operation of the equipment is influenced, and the problem of incomplete regeneration exists.
Disclosure of Invention
The invention aims to provide a device for treating particulate matters in ship exhaust by combining plasma with catalysis, which can treat organic matters in the exhaust by combining plasma with catalysis and can continuously remove particulate matters such as sulfate and metal under the action of an electrostatic field, thereby ensuring the purification efficiency of the ship exhaust and reducing the investment of equipment.
The above object of the present invention is achieved by the following technical solutions: the utility model provides an adopt plasma to combine catalytic treatment device of particulate matter in boats and ships tail gas, includes the air current way, the inside a plurality of positive poles that have of air current way and a plurality of negative plates that are located all positive pole side and can translate, each all coat on the negative plate has V base catalyst to the air current way is provided with heating element in negative plate deviates from positive pole one side, simultaneously, has the clean mechanism that is used for cleaing away the particulate matter on the negative plate in the air current way.
Through adopting above-mentioned technical scheme, at first tail gas gets into the device of this application after, most tail gas can follow and flow through between anodal pole and the negative plate, so on the one hand, carbonaceous granule and organic hydrocarbon in the tail gas can receive the effect of electric field in the air current channel, are ionized formation plasma to be easily by oxidation to CO2And H2O; on the other hand, the incombustible particulate matter and the particulate matter that has not been oxidized completely move to the negative electrode plate by the force of the electric field and adhere to the negative electrode plate.
At the moment, the heating assembly is arranged on the negative plate, so that the negative plate can be heated to 200-300 ℃ through the heating assembly, and substances which are not oxidized in time can be oxidized under the cooperation of the V-based catalyst, so that the oxidation efficiency of tail gas can be improved.
And the negative plate here can carry out the translation, and after some negative plates adsorbed certain particulate matter, it just can move to the position that the tail gas flow warp is few like this, and the clean mechanism of rethread just can clear up the particulate matter on the negative plate down. And the other part of the negative plate can replace the original negative plate to continue the electrostatic dust collection operation, so that the particulate matters in the tail gas can be continuously removed.
Preferably, the air channel is internally provided with a driving shaft and a driven shaft, a plurality of negative plates on the same side are connected in series to form an annular plate chain, and the plate chain is sleeved on the driving shaft and the driven shaft.
Through adopting above-mentioned technical scheme, each negative plate homoenergetic removes along the annular between driving shaft and driven shaft like this to the adsorption of particulate matter efficiency of each negative plate is the same, is realizing under the prerequisite of device serialization operation like this, can improve the electrostatic absorption's of negative plate efficiency again.
Preferably, the side wall of the airflow channel is provided with a groove, a wind shield cover is arranged at the notch of the groove, meanwhile, the negative plate penetrates through the wind shield cover to move between the groove and the airflow channel, and the cleaning mechanism is positioned in the groove.
Through adopting above-mentioned technical scheme, will clean the mechanism and set up in the recess, the electrostatic field in the recess is more weak on the one hand like this, and on the other hand keeps off the wind cap and can block that tail gas directly enters into the recess, and clean the mechanism like this and can get off the dust clearance on the negative plate comparatively smoothly.
Preferably, the cleaning mechanism includes a roller brush which contacts the surface of the negative plate and a dust collection groove which is located below the plate link.
Through adopting above-mentioned technical scheme, utilize the roller brush to sweep the particulate matter down from the flat link, the particulate matter just can enter into the collecting tank like this to guarantee that the negative plate can continuously operate adsorption particles.
Preferably, the cleaning mechanism includes an air blowing nozzle facing the negative plate and a dust collecting groove located below the negative plate.
Through adopting above-mentioned technical scheme, utilize the blowing nozzle to blow out the great air current of velocity of flow, also be favorable to like this with the particulate matter from negative plate clearance to the dust collecting vat in.
Preferably, the positive pole rod is provided with a plurality of branches.
Through adopting above-mentioned technical scheme, the branch is the tip part on the anodal pole, according to point discharge's effect, has strengthened the local voltage intensity between anodal pole and the negative plate effectively, makes carbonaceous granule and the organic hydrocarbon in the tail gas take place the ionization more easily and forms plasma to further improve the oxidation efficiency of tail gas, guarantee the purification degree of tail gas.
Preferably, the power supply applied between the positive pole rod and the negative pole plate is a high-voltage pulse power supply, the highest pulse voltage of the power supply is 15-20 KV, the pulse frequency is 60-80 Hz, and the nearest distance between the positive pole rod and the negative pole plate is 0.5-1 m.
Through adopting above-mentioned technical scheme, utilize high-voltage pulse power supply to handle tail gas, can practice thrift the electric energy on the one hand like this, secondly, high-voltage pulse power supply can provide the high voltage of 15 ~ 20KV in the short time, is favorable to the tail gas composition to be ionized like this to the probability that tail gas was fully oxidized has been improved.
Preferably, the heating component is a resistance wire, and the heating temperature is controlled to be 200-300 ℃.
By adopting the technical scheme, the heating temperature is controlled to be 200-300 ℃, so that the catalytic oxidation effect of the V-based catalyst is facilitated.
Preferably, the V-based catalyst consists of V2O5And TiO2Dispersed and loaded on CNT.
By adopting the technical scheme, the vanadium particles can be highly dispersed on the tube wall of the carbon nano tube, and at low temperature, V is2O5-TiO2The Lewis acid site on the surface of the CNT is NH3Active site of SCR reaction, adsorbed NH3Species and NO in gas phase and adsorbed NO2The species will react. And V is at a reaction temperature of 200-300 DEG C2O5-TiO2the/CNT shows good reaction activity, and at 260 ℃, the catalyst system loaded on the carbon nano tube with the outer diameter of 60-100 nm can enable the NO conversion rate to reach 92%.
Preferably, the coating amount of the V-based catalyst on the negative plate is 10-20 g/dm2。
Through adopting above-mentioned technical scheme, when the tail gas flow was in the pipeline, it can contact with V base catalyst comparatively fully to can improve the catalytic oxidation effect of V base catalyst to tail gas.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the positive pole rod is matched with the movable negative pole plate, and the cleaning mechanism is combined, so that the effect of continuously removing particles in the tail gas can be realized, and the intensity of an electric field can be ensured by removing the particles on the negative pole plate in the process;
2. the V-based catalyst is coated on the negative plate, so that the catalytic oxidation of the tail gas is favorably realized by combining the heating assembly.
3. Pulse voltage is selected for use between anodal pole and the negative plate, can reduce the energy consumption like this on the one hand, and the particle that does not in time oxidize in the on the other hand tail gas also can be by oxidation more easily.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for treating particulate matter in marine exhaust gas by plasma catalysis according to an embodiment I;
fig. 2 is a schematic structural diagram of a second apparatus for treating particulate matter in marine exhaust gas by plasma catalysis according to the second embodiment.
In the figure, 1, a flow channel; 11. a channel; 2. a plate link chain; 21. a negative plate; 22. a resistance wire; 3. a positive pole rod; 4a, a driving shaft; 4a1, a first support frame; 4b, a driven shaft; 4b1 and a second support frame; 5. a groove; 51. a dust collecting tank; 52. roller brushing; 53. a blowing nozzle; 54. a wind shield cover; 55. and a through hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
a device for treating particulate matters in ship exhaust by adopting plasma catalysis is shown in figure 1 and comprises a gas flow channel 1, wherein a plurality of anode rods 3 are arranged in the gas flow channel 1. Wherein, the anode rod 3 is L-shaped, the vertical part of the anode rod is fixed with the top of the airflow channel 1 and is communicated with the anode of the power supply; the axial direction of the horizontal part of the exhaust gas flow channel coincides with the flow direction of the exhaust gas and is located at the middle height position of the gas flow channel 1. Here, all the positive electrode bars 3 are horizontally arranged in the width direction of the air flow channel 1, and the distance between two adjacent positive electrode bars 3 is 5 cm.
In addition, a plurality of negative plates 21 are respectively arranged in the airflow channel 1 close to the top and the bottom of the airflow channel, the negative plates 21 and the horizontal parts of the positive rods 3 are in the same vertical direction, and the number of the specific negative plates 21 can be designed according to actual conditions. Further, the negative electrode plates 21 near the top and bottom of the gas flow channel 11 are connected in series by chains, respectively, to form an endless plate link 2.
Here, one of the side walls of the air flow channel 1 is further provided with two grooves 5, the two grooves 5 are arranged up and down, and the two grooves 5 are respectively horizontally aligned with the plate link 2 near the top of the air flow channel 1 and the plate link 2 near the bottom of the air flow channel 1. Meanwhile, a group of driving shafts 4a and driven shafts 4b are respectively installed at positions close to the top and the bottom of the airflow channel 1, plate chains 2 close to the top of the airflow channel 1 and the bottom of the airflow channel 1 are respectively sleeved on the corresponding group of driving shafts 4a and driven shafts 4b, and the driving shafts 4a are driven by a motor. The driving shaft 4a and the driven shaft 4b are on the same horizontal line.
Meanwhile, two driving shafts 4a are respectively located in the two grooves 5, and a motor for driving the driving shafts 4a is also located in the grooves 5. Here, the motor is fixed with the lateral wall of recess 5, and the output shaft of motor passes through the coupling joint with driving shaft 4a, and on a set of support frame 4a1 was worn to locate respectively at two driving shaft 4 a's axis body both ends, and support frame 4a1 installed on recess 5's lateral wall to support effect can be played to driving shaft 4a to support frame 4a1, and guarantee that the motor drives driving shaft 4 a. Here, the motor is prior art and not shown in the drawings.
And two ends of the shaft body of the two driven shafts 4b are respectively arranged in the two groups of the supporting frames 4b1 in a penetrating way, and the two supporting frames 4b1 are fixed with the side wall of the airflow channel 1, so that the driven shafts 4b are guaranteed to be supported. Here, the second support bracket 4b1 is connected to the negative electrode of the power supply, and the second support bracket 4b1 is connected to the driven shaft 4b and the plate link 2. The plate link 2 is insulated from the axle shaft 4a and the support bracket 4a 1. When both the positive electrode rod 3 and the negative electrode plate 21 are energized, an electric field is generated between the positive electrode rod 3 and the negative electrode plate 21. Most of the tail gas flows between the positive pole rod 3 and the negative pole plate 21, so that on one hand, carbon-containing particles and organic hydrocarbons in the tail gas are subjected to the action of an electric field in the flow channel 1 and are ionized to form plasma, and the carbon-containing particles and the organic hydrocarbons are easily oxidized into CO2 and H2O; on the other hand, non-combustible particulate matter and particulate matter that has not been oxidized completely will move to the negative electrode plate 21 under the action of the electric field and adhere to the negative electrode plate 21.
Further, the nearest distances of the positive electrode bar 3 to the plate link 2 near the top of the gas flow channel 1 and to the plate link 2 near the bottom of the gas flow channel 1 are the same, and are 0.5 m. While the upper and lower width of the plate link 2 is less than 0.1 m. And the power supply applied between the anode rod 3 and the plate link 2 is a high-voltage pulse power supply, the high-voltage pulse is 15KV, and the pulse frequency is 60 Hz. Moreover, the surface of the horizontal part of the positive pole rod 3 is provided with a plurality of branches, so that the electric field intensity between the negative pole plate 21 and the positive pole rod 3 can be further enhanced according to the principle of point discharge, organic matters in the tail gas can be more easily ionized to form plasma, and then the oxidation removal is convenient to carry out later.
In addition, the inside of the groove 5 is provided with a cleaning mechanism which mainly comprises a roller brush 52 contacting with the lower surface of the plate link 2 and a dust collecting groove 51 positioned below the roller brush 52. Wherein, the axial direction of the roller brush 52 is parallel to the width direction of the plate chain 2, and the two ends of the shaft of the roller shaft are rotationally connected with the side walls of the groove 5. In the moving process of the plate chain 2, the plate chain 2 starts from the groove 5, bypasses the driven wheel from the lower part of the whole plate chain 2 and then returns to the groove 5. In the whole process, the negative plate 21 of the plate link 2 can carry the adsorbed solid particles to return to the groove 5, and the roller brush 52 is in contact with the negative plate 21, so that under the action of friction, the roller brush 52 can pull the dust on the negative plate 21 down to the dust collecting tank 51 under the roller brush 52.
Furthermore, the dust collecting groove 51 may be designed as a drawer, and the moving passage 11 is opened between the side wall of the groove 5 and the outer wall of the air flow passage 1. Thus, when the air flow channel 1 stops working, the worker can pull out the dust collecting groove 51 through the channel 11 and pour the dust collecting groove. And because the edge of passageway 11 has the design sealing strip, like this when the normal work of air current channel 1, just can form sealedly between the edge of passageway 11 and the edge of dust collecting tank 51 to avoid the tail gas to take place the condition of leaking.
Moreover, the notch of recess 5 still has wind-shield cover 54, has seted up through-hole 55 on the wind-shield cover 54, and negative plate 21 passes wind-shield cover 54 through-hole 55, and the inside interference that is difficult to receive of recess 5 like this to the particulate matter just can fall smoothly to the dust collecting tank 51 in.
In addition, the airflow channel 1 is also provided with a heating component in one plate link 2, the heating component can be a resistance wire 22 or a heat conduction oil pipe, the heating component is a row of resistance wires 22, the resistance wires 22 are L-shaped, the vertical part of the resistance wires 22 is fixed with the top or the bottom of the airflow channel 1, and the horizontal part of the same row of resistance wires 22 is positioned in the middle of the same plate link 2.
Meanwhile, the heating temperature of the heating element to the negative electrode plate 21 was controlled to 200 ℃. Thus, after the exhaust gas enters the gas flow channel 1, organic matters are ionized and oxidized between the positive electrode rod 3 and the negative electrode plate 21. And the particles which are not oxidized in time are adsorbed to the negative plate 21 under the action of the electrostatic field, and further undergo catalytic oxidation reaction under the action of the V-based catalyst and heating.
Here, the preparation method of the V-based catalyst: v with the particle size of less than 10um2O5And TiO2The mass ratio of the components is 1: 1, then placing the mixture into excessive tetrahydrofuran, adding CNT particles with the particle size of 0.2 mm-0.5 mm into the mixture to prepare suspension, wherein the CNT and the V are mixed uniformly2O51: and 2, uniformly coating the suspension on the negative plate 21, and drying the negative plate 21 at the temperature of 200 ℃ for 30 min. Here, the amount of the V-based catalyst adhering to the negative electrode plate 21 after drying was controlled to 10g/dm2。
Example II,
The only difference between this embodiment and the first embodiment is that the roller brush is replaced by the blowing nozzle, and the blowing nozzle is inclined and the horizontal direction is toward the inside of the groove, as shown in fig. 2. Therefore, when the plate chain moves, the air blowing nozzle can blow the particles on the plate chain down through air blowing, and the cleaning effect is achieved.
In addition, the structures of the third to seventh examples and the first and second comparative examples are the same as the first example, except for the parameters shown in the first table below:
watch 1
| Parameter(s) | Distance between positive pole rod and plate chain/m | High pulse voltage/KV | Pulse frequency/Hz | V catalyst coating area amount/g/dm2 | Heating temperature/. degree.C |
| EXAMPLE III | 0.7 | 18 | 70 | 15 | 250 |
| Example four | 1 | 20 | 80 | 20 | 300 |
| EXAMPLE five | 0.5 | 20 | 70 | 10 | 300 |
| EXAMPLE six | 0.7 | 15 | 60 | 15 | 200 |
| EXAMPLE seven | 1 | 18 | 80 | 20 | 250 |
| Comparative example 1 | 0.7 | 15 | 60 | / | 200 |
| Comparative example No. two | 1 | 18 | 80 | 20 | 40 |
Will contain a concentration of 20g/m3Sulfate particles, 3g/m3NOxDiesel engine exhaust gas of (1), in 100m3The flow velocity of/min was passed through the exhaust gas treatment devices of the above-described examples one to seven having a length of 5m, in which the horizontal portion length of the positive electrode bar and the length of the negative electrode plate in the exhaust gas flow direction were also 3m, and finally the contents of the respective substances in the exhaust gas were measured, and the results are shown in the following table two,
watch two
| Test items | Content of particulate matter/mg/m3 | NOx/mg/m3 |
| Example one | 0.007 | Not detected out |
| Example two | 0.007 | Not detected out |
| EXAMPLE III | 0.006 | Not detected out |
| Example four | 0.004 | Not detected out |
| EXAMPLE five | 0.005 | Not detected out |
| EXAMPLE six | 0.006 | Not detected out |
| EXAMPLE seven | 0.004 | Not detected out |
| Comparative example 1 | 0.016 | 0.008 |
| Comparative example No. two | 0.013 | 0.0014 |
To summarize:
1. with reference to the first to seventh embodiments and the test results in the second table, it can be seen that the device of the present application can effectively remove the particulate matter and NO in the exhaust gasx；
2. Combining the sixth example and the first comparative example, and combining the test results in Table two, it can be seen that the coating of V catalyst can effectively ensure the particulate matter and NOxIs removed;
3. when the seventh example and the second comparative example are combined and the test results in the second table are combined, it can be seen that the heating temperature is too low to be beneficial to the catalytic reaction of the V catalyst.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides an adopt plasma to combine catalytic treatment particulate matter in boats and ships tail gas, includes air current way (1), its characterized in that: the novel air flow channel is characterized in that a plurality of positive pole rods (3) and a plurality of translational negative plates (21) are arranged in the air flow channel (1), each negative plate (21) is coated with a V-based catalyst, a heating assembly is arranged on one side, deviating from the positive pole rods (3), of the negative plate (21) of the air flow channel (1), and meanwhile, a cleaning mechanism used for removing particles on the negative plate (21) is arranged in the air flow channel (1).
2. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 1, characterized in that: the air flow channel (1) is internally provided with a driving shaft (4 a) and a driven shaft (4 b), a plurality of negative plates (21) on the same side are connected in series to form an annular plate chain (2), and the plate chain (2) is sleeved on the driving shaft (4 a) and the driven shaft (4 b).
3. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to the claim 1 or 2, characterized in that: the side wall of the airflow channel (1) is provided with a groove (5), a wind shield cover (54) is arranged at the notch of the groove (5), meanwhile, the negative plate (21) penetrates through the wind shield cover (54) to move between the groove (5) and the airflow channel (1), and the cleaning mechanism is located in the groove (5).
4. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 3, characterized in that: the cleaning mechanism comprises a roller brush (52) contacted with the surface of the negative plate (21) and a dust collecting groove (51) positioned below the plate chain (2).
5. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 3, characterized in that: the cleaning mechanism comprises an air blowing nozzle (53) facing the inner side of the negative plate (21) and a dust collecting groove (51) positioned below the negative plate (21).
6. The device for treating particulate matters in ship exhaust gas by combining plasma and catalysis according to claim 1, wherein the device comprises: the anode rod (3) is provided with a plurality of branches.
7. The device for treating the particulate matters in the ship exhaust by using the plasma catalysis as claimed in claim 6, wherein: the power supply applied between the positive pole rod (3) and the negative pole plate (21) is a high-voltage pulse power supply, the highest pulse voltage of the power supply is 15-20 KV, the pulse frequency is 60-80 Hz, and the nearest distance between the positive pole rod (3) and the negative pole plate (21) is 0.5-1 m.
8. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 1, characterized in that: the heating component is a resistance wire (22), and the heating temperature of the heating component is controlled to be 200-300 ℃.
9. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 1, characterized in that: the V-based catalyst consists of V2O5And TiO2Dispersed and loaded on CNT.
10. The device for treating the particulate matters in the ship exhaust gas by combining the plasma with the catalysis according to claim 9, wherein: the coating amount of the V-based catalyst on the negative plate (21) is 10-20 g/dm2。
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