CN1935385A - Needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device - Google Patents
Needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device Download PDFInfo
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- CN1935385A CN1935385A CNA200610047775XA CN200610047775A CN1935385A CN 1935385 A CN1935385 A CN 1935385A CN A200610047775X A CNA200610047775X A CN A200610047775XA CN 200610047775 A CN200610047775 A CN 200610047775A CN 1935385 A CN1935385 A CN 1935385A
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Abstract
The present invention belongs to the field of low-temperature plasma and environmental pollution control technology, and relates to a needle-array electrode bipolar corona discharge high-temperature carbon smoke catcher equipment. It includes the following several portions: an electric control unit, a high-voltage DC power supply, a carbon smoke catching unit and a shell body. Besides, said invention also provides the concrete structure of the above-mentioned every portion and the connection mode of all the above-mentioned portions.
Description
Technical field
The invention belongs to low temperature plasma and environmental pollution treatment technology field, is a kind of device of needle array electrode bipolar corona discharge high-temperature carbon smoke trapping.
Background technology
Oil burning boiler and diesel engine are used very extensive in the middle of industry, but the soot particle of its discharging is also very serious to the pollution of air.The soot emissions that solves oil burning boiler and diesel engine pollutes, and mainly is divided into two approach of emission controls by improving combustion and external purification.Emission controls by improving combustion: the method that reduces the harmful emission of diesel engine amount is to improve the burning condition of diesel engine, improves the technical performance of diesel engine comprehensively.Continuous employing along with new technologies such as electronic fuel injection technology, charge inter cooling technology, waste gas recirculation will further improve the burning and the course of work of diesel engine, and the soot emissions that improves diesel engine significantly pollutes.It is with high content of technology that but emission controls by improving combustion requires, and has high input, and the cycle is long.External purification: by using certain device, capture carbon soot particles, reach the purpose that reduces soot emissions.The main method that present machine reduces the high-temperature carbon smoke particulate outward has: Electrostatic Absorption method, Mist Using Filtering and Capturing Method and centrifugal separation, various trapping techniques cut both ways.
Open source literature compact internal combustion engine and motorcycle, 2003,32 (2): 35-38 has introduced overanxious method of trapping.The filtering and cleaning technique trap particles is the post processing mode that present various countries research institution generally adopts.Using maximum in the market is ceramic filter, and its advantage is the filter efficiency height, can reach 60～95%, and filter quality is good, the structural strength height, and heat shock resistance and anti-mechanical oscillation ability are also stronger.But its manufacturing process complexity, the quality requirement height, use a period of time after back pressure can raise, when exhaust back pressure reached certain value, engine performance was variation, thus the regeneration problem of ceramic filter become this method can practical key.The method of regeneration has electrical heating method, microwave reclaiming method, the combustion-supporting method of oil spout etc. at present.Ceramic filter is low through the pressure drop of regeneration back, plays the filtering effect again.
Open source literature Guangxi Technical College journal, 2004,15 (2): the 9-13 brief summary present situation aspect the diesel oil engine carbon smoke particulate capture, used of plasma technique.Do many work aspect the plasma technique trap particles utilizing both at home and abroad at present, under lab obtained some achievements.Wherein, a kind of mode is to add certain voltage on woven wire, makes particulate charged through the upstream wire netting time, and the place is adsorbed at the downstream wire netting.Experiment obtains some obvious soot particles and captures the result, but fails to reach practical application because of arresting efficiency is difficult to improve.On this basis, proposition corona discharge reinforcement particulate is charged to drive into charged particulate with electric field force, to improve micro particle catching efficient.
It is charged to increase soot particle by non-thermal discharge, promotes the capture of soot particle then with filtration or high voltage electric field.But the same with filtering technique, run into the regeneration problem equally, promptly how the particulate of Bu Jiing is removed and discharge can normally be kept and is not influenced arresting efficiency.Because true soot particle main component is carbon soot particles, solvable hydrocarbon organic matter, sulphur and water, can not remove with conventional method.Italy one research institution proposes, and in the online cartridge type corona discharge trap, utilizes spark discharge that particulate on the barrel is ignited and burnouts.This proposes high requirement to high voltage source, and the randomness of the generation area of spark discharge simultaneously brings difficulty for the soot that burnouts.
Summary of the invention
The purpose of this invention is to provide the device of a kind of energy efficient high-temperature carbon smoke trapping particulate steady in a long-term, and solve its regeneration problem.
Know-why of the present invention is, corona discharge produces a large amount of high energy electrons, and negative ions is to the gas molecule by region of discharge, soot particle carries out charged, particle after charged is directed trend needle-array electrode plate under the electric field force effect, and sticks on the battery lead plate, reaches the purpose of removal.
The present invention is achieved through the following technical solutions: the needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device, by electric control unit, high-voltage DC power supply, soot capture unit 5, housing 6 is formed, soot capture unit 5 is made of the electrode plate with high voltage 3 and the ground electrode plate 4 in parallel of parallel connection, electrode plate with high voltage 3 and ground electrode plate 4 are spaced, the upper and lower side of electrode plate with high voltage 3 and ground electrode plate 4 is installed in respectively in the mounting groove that is provided with in housing 6 upper and lowers, electrode plate with high voltage 3 and ground electrode plate 4 are provided with the needle point body, needle point body on the battery lead plate is 10-50 row altogether, every row 10-50 root, arrange in order, spacing between the needle point body is in 15-30mm, needle point height degree is 5-7mm, and the needle point body on the high-pressure polar plate 3 and the spacing of the needle point body on the ground electrode plate 4 are 15-40mm; At the about 3-4mm in ionization electrode plate surface place, be provided with resistive heater 7 in each needle point body spacing center, resistance wire 7 two ends are stretching with spring 8, be fixed on the porcelain bushing 9, electrical heating is introduced the binding post 1 negative high voltage introducing electrode 2 that is connected with heating power supply and is connected with negative high voltage power source.Described needle point body is totally 10 rows, 10 of every rows, and electrode plate with high voltage 3 is 2-9, ground electrode plate 4 is 2-10.Carry out connection in series-parallel according to each resistance wire of the big young pathbreaker of each resistance wire resistance, be connected with electrical network AC220V, constitute the regenerative system of discharge reactor by high voltage isolator, pressure regulation, relay.Waste gas is by corona discharge region, and under novel bipolar corona discharge effect, the swift electron of initiation, negative ions cause the soot particle over-saturation charged, and orientation tends to the needle-array electrode plate under the electric field force effect, and sticks on the battery lead plate.The air inlet of type soot capturing device is connected with combustion machine exhaust outlet, the air inlet place is provided with woven wire and just filters, discharging waste gas is through just entering the soot capture unit after the filter, soot is wherein efficiently captured, when the soot accumulation that captures arrives certain thickness, start the soot that heating power supply burnouts and is captured, holdout device operation steady in a long-term, waste gas is discharged by air outlet after the soot capture unit is handled.The electrical control and the high voltage source of device all are located at the device outside, and the influence of high temperature to electric property avoided in being electrically connected and fixing and all adopt resistant to elevated temperatures porcelain bushing of high pressure and heating.Charged is the prerequisite of particulate directed movement, has determined the capture effect to a great extent.During discharge, have only effective high energy electron just can make particulate charged, the quantity of its generation N-dielectric gas density that is directly proportional with E/N.Because the electric field between the needle-array electrode is a kind of extremely uneven electric field, near the power line the needle electrode tip is concentrated, so the electric-field intensity that produces is very high.Bipolar discharge has two such high field intensity districts, thereby can produce more effective high energy electron, and the charged probability of particle is strengthened, and the charged time shortens, and is captured rapidly.Because two electrodes are the pin array structure, corona discharge occurs in needle point body place, so captured the stability that thicker soot particle also can not influence discharge on two electrodes.So its arresting efficiency can not reduce with the increase of service time.The cycle of its reactor regeneration is far longer than the discharge reactor of electrode structures such as ceramic filter and line plate needle plate.Between near needle-array electrode plate surface needle point body electrode, arrange resistive heater, when the particulate that captures reaches certain thickness on battery lead plate, start heating power supply at short notice resistance wire near the particulate that is captured it is burnouted, simple and fast reach the regeneration purpose.
Effect of the present invention and benefit are that the bipolar corona discharge of pin array has two high field intensity districts, can produce more high energy electron, makes soot particle charged more abundant, thereby the arresting efficiency height.Because discharge occurs in needle point body place, capturing certain thickness soot particle on the pole plate can not influence discharge yet, so the regeneration period of this discharge reactor is very long.Between near needle-array electrode plate surface needlepoint electrode, arrange resistive heater, when the particulate that captures reaches certain thickness on battery lead plate, start heating power supply at short notice resistance wire near the particulate that is captured it is burnouted, simple and fast reach the regeneration purpose.The plasma isoreactivity particle that is produced by corona discharge can also be removed other pollutants in the gas simultaneously.The required less investment of apparatus of the present invention equipment, the arresting efficiency height, resistance is little, and operation maintenance is simple and convenient, and expense is low.Reactor regeneration is very simple and efficient.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a STRUCTURE DECOMPOSITION schematic diagram of the present invention.
Fig. 3 is an electrode plate structure schematic diagram of the present invention.
Among the figure: 1, binding post is introduced in electrical heating, and 2, negative high voltage introduces electrode, 3, electrode plate with high voltage, 4, the ground electrode plate, 5, the soot capture unit, 6, housing, 7, resistance wire, 8, spring, 9, porcelain bushing.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
In small-sized pin array bipolar corona discharge reactor, carry out soot particle and remove experiment.The high 120mm of discharge channel, long 30～120mm is adjustable, and high-pressure side and ground end are needle-array electrode.8 needle point bodies of every row are totally ten rows, and homopolarity needle point body spacing is 20mm, and two electrode spacing d are 30mm.Discharge voltage is negative 18kV, and discharge current is 0.6mA.In relative humidity is 30-50%, and temperature is 20-25 ℃, and wind speed is to handle under the 0.5m/s condition.Obtaining particle diameter is 1 μ m, 3 μ m, and 5 μ m, the soot particle removal effect of 10 μ m is respectively 78%, 86%, 92%, 98%.
Repeat embodiment 1, the change wind speed is 1m/s, and obtaining particle diameter is 1 μ m, 3 μ m, and 5 μ m, the soot particle removal effect of 10 μ m is respectively 66%, 79%, 85%, 94%.
Repeat embodiment 1, the change wind speed is 2m/s, and obtaining particle diameter is 1 μ m, 3 μ m, and 5 μ m, the soot particle removal effect of 10 μ m is respectively 52%, 68%, 78%, 86%.
Claims (3)
1, the needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device, it is characterized in that, by electric control unit, high-voltage DC power supply, soot capture unit (5), housing (6) is formed, soot capture unit (5) is made of the electrode plate with high voltage (3) of parallel connection and ground electrode plate (4) in parallel, electrode plate with high voltage (3) and ground electrode plate (4) are spaced, the upper and lower side of electrode plate with high voltage (3) and ground electrode plate (4) is installed in respectively in the mounting groove that is provided with in housing (6) upper and lower, electrode plate with high voltage (3) and ground electrode plate (4) are provided with the needle point body, needle point body on the battery lead plate is 10-50 row altogether, every row 10-50 root, arrange in order, the spacing between the needle point body is in 15-30mm, needle point height degree is 5-7mm, and the spacing of the needle point body on needle point body on the high-pressure polar plate (3) and the ground electrode plate (4) is 15-40mm; At the about 3-4mm in ionization electrode plate surface place, be provided with resistive heater (7) in each needle point body spacing center, resistance wire (7) two ends are stretching and be fixed on the porcelain bushing (9) with spring (8), and electrical heating is introduced binding post (1) the negative high voltage introducing electrode (2) that is connected with heating power supply and is connected with negative high voltage power source.
2, needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device according to claim 1 is characterized in that, described needle point body is totally 10 rows, 10 of every rows.
3, according to claim 1 described a kind of needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device,, it is characterized in that described electrode plate with high voltage (3) is 2-9, ground electrode plate (4) is 2-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610047775XA CN100493728C (en) | 2006-09-13 | 2006-09-13 | Needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610047775XA CN100493728C (en) | 2006-09-13 | 2006-09-13 | Needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device |
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| Publication Number | Publication Date |
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| CN1935385A true CN1935385A (en) | 2007-03-28 |
| CN100493728C CN100493728C (en) | 2009-06-03 |
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| CNB200610047775XA Expired - Fee Related CN100493728C (en) | 2006-09-13 | 2006-09-13 | Needle array electrode bipolar corona discharge high-temperature carbon smoke trapping device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078841A (en) * | 2010-11-22 | 2011-06-01 | 南京师范大学 | Single-zone plate type high-temperature electrostatic dust collector |
| CN105921273A (en) * | 2016-06-07 | 2016-09-07 | 西南交通大学 | Movable static haze removal device |
| CN107762598A (en) * | 2016-08-22 | 2018-03-06 | 福特环球技术公司 | Method and system for exhaust particulate matter sensing |
-
2006
- 2006-09-13 CN CNB200610047775XA patent/CN100493728C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078841A (en) * | 2010-11-22 | 2011-06-01 | 南京师范大学 | Single-zone plate type high-temperature electrostatic dust collector |
| CN102078841B (en) * | 2010-11-22 | 2013-03-06 | 南京师范大学 | Single-zone plate type high-temperature electrostatic dust collector |
| CN105921273A (en) * | 2016-06-07 | 2016-09-07 | 西南交通大学 | Movable static haze removal device |
| CN107762598A (en) * | 2016-08-22 | 2018-03-06 | 福特环球技术公司 | Method and system for exhaust particulate matter sensing |
| CN107762598B (en) * | 2016-08-22 | 2021-07-20 | 福特环球技术公司 | Method and system for exhaust particulate matter sensing |
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| Publication number | Publication date |
|---|---|
| CN100493728C (en) | 2009-06-03 |
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Owner name: AEROSPACE COMMUNICATIONS HOLDINGS CO., LTD. Free format text: FORMER OWNER: DALIAN MARTITIME AFFAIRS UNIV. Effective date: 20110914 |
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