DK150012C - Electrical connection to an electrostatic filter - Google Patents
Electrical connection to an electrostatic filter Download PDFInfo
- Publication number
- DK150012C DK150012C DK084975AA DK84975A DK150012C DK 150012 C DK150012 C DK 150012C DK 084975A A DK084975A A DK 084975AA DK 84975 A DK84975 A DK 84975A DK 150012 C DK150012 C DK 150012C
- Authority
- DK
- Denmark
- Prior art keywords
- capacitor
- dust filter
- storage capacitor
- coupling
- self
- Prior art date
Links
Classifications
-
- 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
- B03C3/66—Applications of electricity supply techniques
Landscapes
- Electrostatic Separation (AREA)
- Generation Of Surge Voltage And Current (AREA)
Description
Opfindelsen angår en elektrisk kobling til et elektrostatisk støvfilter med en kobling til frembringelse af en jævnspænding, der till edes den af støvfiltrets elektroder dannede kondensator, samt med en med lagerkondensator forsynet impulsgenerator og med mellem lagerkondensatoren og den af støvfiltrets elektroder dannede kondensator indkoblede induktive organer, der tilfører støvfiltrets elektroder impulser overlejret på jævnspændingen, hvorhos lagerkondensatoren, de induktive organer og den af støvfiltrets elektroder dannede kondensator danner en LC-svingningskreds.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an electrical coupling to an electrostatic dust filter having a coupling for generating a DC voltage supplied to the capacitor formed by the dust filter electrodes, and to a pulse generator provided with the storage capacitor and to the intermediate capacitor formed by the storage capacitor and the electrode of the dust filter. supplying impulses to the dust filter electrodes superimposed on the DC voltage, whereby the storage capacitor, the inductive means and the capacitor formed by the dust filter electrodes form an LC oscillation circuit.
Ved overlejringen af impulser på jævnspændingen er det muligt periodisk at forhøje elektrodespændingen langt over overslagsspændingen i så korte tidsrum, at der ikke kan nå at udvikle sig et gnistoverslag. Herved forøges effektiviteten af støvudskillelsen.By superimposing the pulses on the DC voltage, it is possible to periodically increase the electrode voltage well above the estimate voltage for such a short period of time that a spark estimate cannot be developed. This increases the efficiency of dust separation.
En kobling af den angivne art kendes fra tysk offentliggørelsesskrift nr. 2.253.601. I dette skrift foreslås det at udnytte tilbagesvingningsimpulsen fra filtret til opbygning af den på filterelektroderne hvilende jævnspænding over en kondensator, til hvilken der er sluttet en dæmpningskreds. Herved går hele den i filtret ikke forbrugte del af impulsenergien tabt, og lagerkondensatoren må for hver impuls oplades påny fra den ydre strømforsyning. Da den del af impulsenergien, der forbuges i filtret, kun er en ringe procentdel, f.eks. 10%, af den samlede energi, vil tabet i dæmpningskredsen ved den høje impulsspænding og store impulshyppighed, der er nødvendig for at opnå en virkelig betydningsfuld forbedring af filtrets effektivitet, blive så stort, at den krævede energiforsyning til genopladning af lagerkondensatoren for hver impuls bliver prohibitivt stor, ja eventuelt af samme størrelsesorden som eller endog større end den energimængde, der leveres af den kraftkilde, som skal gøres støvfri.A coupling of the specified type is known from German Publication No. 2,253,601. In this specification, it is proposed to utilize the feedback pulse from the filter to build the DC voltage resting on the filter electrodes over a capacitor to which a damping circuit is connected. In this way, the entire part of the impulse energy consumed in the filter is not lost and the storage capacitor must be recharged for each pulse from the external power supply. Since the part of the impulse energy consumed in the filter is only a small percentage, e.g. 10%, of the total energy, the loss in the attenuation circuit at the high pulse voltage and high pulse frequency needed to achieve a truly significant improvement in the efficiency of the filter will be so large that the required energy supply to recharge the storage capacitor for each pulse becomes prohibitively large, yes possibly of the same order of magnitude or even greater than the amount of energy supplied by the power source to be made dust-free.
Opfindelsen går ud på at afhjælpe denne ulempe, og med henblik herpå består det for opfindelsen ejendommelige i, at der i svingningskredsen indgår koblingsorganer, som tilbagefører en væsentlig del af den i hver impuls fra lagerkondensatoren til den af støvfiltrets elektroder dannede kondensator overførte og i denne kapacitivt lagrede energimængde til lagerkondensatoren til fornyet opladning af denne.The invention is intended to alleviate this disadvantage, and for this purpose it is peculiar to the invention that the oscillating circuit includes coupling means which return a substantial part of the impulse from the storage capacitor to the capacitor formed by the dust filter electrodes and in it. capacitively stored energy quantity for the storage capacitor for recharging of it.
Herved opnås, at den ydre strømforsyning til opladning af lagerkondensatoren begrænses til den energimængde, der rent faktisk 2 forbruges af filtret i impulsperioderne.This achieves that the external power supply for charging the storage capacitor is limited to the amount of energy actually consumed by the filter during the pulse periods.
Fra U.S.A. patent nr. 3.849.670 kendes en impulsgenerator med en lagerkondensator, som er sluttet til en jævnspændingsføde-kreds og tillige gennem et spændingsaktiveret impulsinitieringsorgan og en transformator er koblet til en induktiv forbrugerkreds, navnlig til gnisttænding. Parallelt med impulsinitieringsorganet og med modsat ledningsretning er tilsluttet en diodeensretter i serie med en induktans til tilbageføring af den efter forbrug af impulsenergien i forbrugerkredsen resterende induktive energi til lagerkondensatoren til hjælp ved genopladning af denne. Der frembringes med denne kendte impulsgenerator i forbrugerkredsen en højspændt jævnstrømsforsyning, son er overlejret med en vekselspænding bestående af impulser med en høj frekvens, f.eks. 20.000 Hz. En sådan højspændt jævnstrømsforsyning er ikke anvendelig til en elektrostatisk støvudskiller, da der her kræves en højspændt jævnstrømsforsyning af filterelektroderne med kortvarige, adskilte, højspændte impulser til effektivisering af støvudskillelsen uden eller dog med den mindst mulige hyppighed af gnistoverslag.From usa. Patent No. 3,849,670 discloses a pulse generator with a storage capacitor connected to a DC supply circuit and also connected to an inductive consumer circuit, in particular to spark ignition, through a voltage-activated pulse initiator and a transformer. Parallel to the pulse initiator and in opposite direction, a diode rectifier is connected in series with an inductance for returning the inductive energy remaining in the consumer circuit to the storage capacitor after recharging it. With this known pulse generator in the consumer circuit, a high voltage DC supply is generated, which is superimposed with an alternating voltage consisting of high frequency pulses, e.g. 20,000 Hz. Such a high voltage DC supply is not applicable to an electrostatic dust separator, as a high voltage DC supply of the filter electrodes is required here with short, separate, high voltage pulses to improve dust separation without or with the least possible frequency of grating.
En simpel og effektiv udformning af den elektriske kobling ifølge opfindelsen kan opnås ved, at de i svingningskredsen liggende koblingsorganer er en elektrisk ventil, der er parallelkoblet med et impulsinitierende organ med modsat ledningsretning. Hvis man samtidig lader selvinduktionen i LC-kredsen udgøres af en impulstransformators sekundærvikling, opnås den særlige fordel, at man kan .lade impulsgeneratoren arbejde ved lavere spænding end selve filtret, hvorved der i impulsgeneratoren kan anvendes vel kontrollerede udladningselementer som f.eks. thyristorer.A simple and effective design of the electrical coupling according to the invention can be achieved by the coupling means located in the oscillating circuit being an electrical valve which is connected in parallel with an impulse initiating means with opposite conduction direction. If, at the same time, the self-induction in the LC circuit is constituted by the secondary winding of a pulse transformer, the special advantage is obtained that the pulse generator can be operated at a lower voltage than the filter itself, whereby well controlled discharge elements such as the pulse generator can be used. thyristors.
Ved en anden udførelsesform for en elektrisk kreds ifølge opfindelsen udgøres selvinduktionen i LC-svingningskredsen af serieforbindelsen af to selvinduktionsspoler, af hvilke den ene sidder i tilledningen til filtret, og af hvilke den anden er en selvinduktionsspole, som er shuntet med serieforbindelsen af et gnistgab og en spændingskilde. Herved vil der kunne opnås endnu kortere impulser, fordi man opnår fuldstændig frihed til valg af selvinduktionen i svingningskredsen, da der ikke i denne kommer til at indgå nogen transformatorvikling.In another embodiment of an electrical circuit according to the invention, the self-induction in the LC oscillation circuit consists of the series connection of two self-induction coils, one of which sits in the lead of the filter, the other of which is a self-induction coil shunted by the series connection of a spark gap and a source of tension. In this way, even shorter impulses can be obtained, because you obtain complete freedom to choose the self-induction in the oscillation circuit, since no transformer winding will be included in this.
Med særlig fordel kan ifølge opfindelsen LC-svingningskredsen være afstemt til resonans ved en frekvens, der tilnærmelsesvis har impulsen som halvbølge.With particular advantage, according to the invention, the LC oscillation circuit can be tuned to resonance at a frequency approximately having the pulse as a half-wave.
3 På tegningen er der i fig. 1 og 2 vist diagrammer for to udførelsesformer for elektriske koblinger ifølge opfindelsen.3 In the drawing, FIG. 1 and 2 are diagrams for two embodiments of electrical couplings according to the invention.
Ved den i fig. 1 viste udførelsesform findes der en til en vekselspændingskilde 1 gennem en ensretter koblet opladningskreds A 5 for en lagerkondensator 3, en som impulsgenerator tjenende udladningskreds B for denne og en svingningskreds C, hvori det elektrostatiske filter 10 indgår som kapacitet, og som er koblet til udladningskredsen gennem en transformator 7, 8. I udladningskredsen er en thyristor 6, 11 og en ensretter 5 koblet i antiparal 1 elkob-10 ling. Kondensatoren 3 holdes af opladningskredsen A opladet til en givet spænding. Når thyristoren 6, 11 tændes, udlades kondensatoren 3 og frembringer en svingning i svingningskredsen C. Under den positive halvbølge af denne svingning bringes filtrets spænding op på en meget høj positiv værdi, idet den positive halvbølge overlej-15 res på jævnspændingen. Under den negative halvbølge sker der en kraftig reduktion af filtrets spænding, og impulsenergien vender gennem ensretteren 5 tilbage til udladningskredsen og genoplader kondensatoren 3. Det energitab, der sker undervejs, erstattes fra opladningskredsen A.In the embodiment shown in FIG. 1, there is provided an AC voltage source 1 through a rectifier coupled charging circuit A 5 for a storage capacitor 3, a charging circuit B serving for pulse generator 3 thereof and a vibrating circuit C, in which the electrostatic filter 10 is included as capacity and which is connected to the discharge circuit. through a transformer 7, 8. In the discharge circuit, a thyristor 6, 11 and a rectifier 5 are coupled in antiparal 1 electrical connection. The capacitor 3 is held by the charge circuit A charged to a given voltage. When the thyristor 6, 11 is turned on, the capacitor 3 is discharged and produces a vibration in the vibration circuit C. During the positive half-wave of this vibration, the voltage of the filter is brought up to a very high positive value, the positive half-wave being superimposed on the DC voltage. During the negative half-wave, the filter voltage is greatly reduced and the impulse energy returns through rectifier 5 to the discharge circuit and recharges the capacitor 3. The loss of energy that occurs along the way is replaced by the charge circuit A.
20 Ved den i fig. 2 viste udførelsesform anvendes der til opladning af lagerkondensatoren 3 en højspændt jævnspændingskilde 2, og i udladningskredsen anvendes der i stedet for thyristoren 6, 11 et gnistgab 12, som er parallel kobl et med en ensretter 15. Da gnistgabet tåler en høj spænding, finder udladningen i dette ti 1 -25 fælde sted direkte i den svingningskreds, hvori det elektrostatiske filter 20 indgår som kondensator, således at man undgå en transformator, hvilket er muliggjort ved, at gnistgabet tåler en meget høj spænding.20 In the embodiment of FIG. 2, a high voltage DC voltage source 2 is used to charge the storage capacitor 3, and in the discharge circuit a spark gap 12 is used, which is connected in parallel with a rectifier 15, instead of the thyristor 6, 11, since the spark gap can withstand a high voltage. in this ten -25 trap takes place directly in the oscillation circuit in which the electrostatic filter 20 acts as a capacitor, so as to avoid a transformer, which is made possible by the spark gap tolerating a very high voltage.
30 3530 35
Claims (5)
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK084975AA DK150012C (en) | 1975-03-03 | 1975-03-03 | Electrical connection to an electrostatic filter |
| SE7602263A SE408761C (en) | 1975-03-03 | 1976-02-24 | CIRCUIT FOR ELECTROSTATIC DUST Separators |
| AU11481/76A AU497363B2 (en) | 1975-03-03 | 1976-02-27 | Electrostatic precipitator |
| MX100239U MX3354E (en) | 1975-03-03 | 1976-02-27 | IMPROVEMENTS IN ELECTROSTATIC PRECIPITATOR |
| CA246,792A CA1055105A (en) | 1975-03-03 | 1976-02-27 | Electrostatic precipitator arrangement |
| BR7601251A BR7601251A (en) | 1975-03-03 | 1976-02-27 | IMPROVEMENT IN ELECTROSTATIC PRECIPITATOR DISPOSAL |
| DE2608436A DE2608436C2 (en) | 1975-03-03 | 1976-03-01 | Electrical circuit for an electrostatic dust collector |
| NL7602086A NL7602086A (en) | 1975-03-03 | 1976-03-01 | EQUIPMENT WITH AN ELECTROSTATIC SEPARATOR. |
| GB8344/76A GB1544105A (en) | 1975-03-03 | 1976-03-02 | Electrostatic precipitator arrangement |
| ES445704A ES445704A1 (en) | 1975-03-03 | 1976-03-02 | Electrostatic precipitator arrangement |
| FR7605898A FR2302788A1 (en) | 1975-03-03 | 1976-03-02 | ELECTROSTATIC PRECIPITATOR FORMING |
| ZA761276A ZA761276B (en) | 1975-03-03 | 1976-03-03 | An electrostatic precipitator arrangement |
| JP51023062A JPS5743062B2 (en) | 1975-03-03 | 1976-03-03 | |
| SU762334803A SU876051A3 (en) | 1975-03-03 | 1976-03-30 | Electrostatic dust absorbing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK84975 | 1975-03-03 | ||
| DK084975AA DK150012C (en) | 1975-03-03 | 1975-03-03 | Electrical connection to an electrostatic filter |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK84975A DK84975A (en) | 1976-09-04 |
| DK150012B DK150012B (en) | 1986-11-17 |
| DK150012C true DK150012C (en) | 1992-05-25 |
Family
ID=8098239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK084975AA DK150012C (en) | 1975-03-03 | 1975-03-03 | Electrical connection to an electrostatic filter |
Country Status (14)
| Country | Link |
|---|---|
| JP (1) | JPS5743062B2 (en) |
| AU (1) | AU497363B2 (en) |
| BR (1) | BR7601251A (en) |
| CA (1) | CA1055105A (en) |
| DE (1) | DE2608436C2 (en) |
| DK (1) | DK150012C (en) |
| ES (1) | ES445704A1 (en) |
| FR (1) | FR2302788A1 (en) |
| GB (1) | GB1544105A (en) |
| MX (1) | MX3354E (en) |
| NL (1) | NL7602086A (en) |
| SE (1) | SE408761C (en) |
| SU (1) | SU876051A3 (en) |
| ZA (1) | ZA761276B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2713675C2 (en) * | 1977-03-28 | 1984-08-23 | Siemens AG, 1000 Berlin und 8000 München | Power supply for an electrostatic precipitator |
| JPS54170480U (en) * | 1978-05-23 | 1979-12-01 | ||
| JPS54170481U (en) * | 1978-05-23 | 1979-12-01 | ||
| JPS56155661A (en) * | 1980-05-02 | 1981-12-01 | Asahi Okuma Ind Co Ltd | Generation of static electricity and apparatus therefor |
| DE3027172A1 (en) * | 1980-07-17 | 1982-02-18 | Siemens AG, 1000 Berlin und 8000 München | METHOD FOR OPERATING AN ELECTROFILTER |
| DE3165590D1 (en) * | 1980-12-17 | 1984-09-20 | Smidth & Co As F L | Method of controlling operation of an electrostatic precipitator |
| IN159046B (en) * | 1982-04-22 | 1987-03-14 | Dresser Uk Ltd | |
| US4522635A (en) * | 1982-10-19 | 1985-06-11 | Flakt Aktiebolag | Method and device for varying a d.c. voltage connected to an electrostatic dust separator |
| DE3241060A1 (en) * | 1982-11-06 | 1984-05-10 | Buckau-Walther AG, 4048 Grevenbroich | ELECTRICAL CIRCUIT FOR AN ELECTROSTATIC WORKING DUST SEPARATOR |
| DE3246057A1 (en) * | 1982-12-13 | 1984-06-14 | Metallgesellschaft Ag, 6000 Frankfurt | DEVICE FOR SUPPLYING AN ELECTRIC FILTER |
| JPS624454A (en) * | 1985-07-01 | 1987-01-10 | Mitsubishi Heavy Ind Ltd | Self-discharge and pulse-charged system electrostatic precipitator |
| DE102009042113A1 (en) * | 2009-09-18 | 2011-04-21 | Kma Umwelttechnik Gmbh | Electrostatic precipitators and methods for separating particles from gases |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2253601A1 (en) * | 1972-11-02 | 1974-05-16 | 8601 Steinfeld | PROCESS AND EQUIPMENT FOR ELECTRONIC DUST SEPARATION |
| US3849670A (en) * | 1973-04-13 | 1974-11-19 | Webster Electric Co Inc | Scr commutation circuit for current pulse generators |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2280330A (en) * | 1940-08-22 | 1942-04-21 | Research Corp | Power circuit for electrical precipitators |
| US2326237A (en) * | 1942-01-12 | 1943-08-10 | Western Precipitation Corp | Rectifying apparatus for electrical precipitators |
| US3425780A (en) * | 1966-09-26 | 1969-02-04 | Liberty Combustion Corp | Fluid fuel igniter control system |
| GB1275523A (en) * | 1969-04-14 | 1972-05-24 | Pillar Corp | Corona discharge plastics treater apparatus |
| DE2340716A1 (en) * | 1972-11-02 | 1975-02-20 | 8601 Steinfeld | DEVICE FOR ELECTRONIC DUST SEPARATION |
-
1975
- 1975-03-03 DK DK084975AA patent/DK150012C/en not_active IP Right Cessation
-
1976
- 1976-02-24 SE SE7602263A patent/SE408761C/en not_active IP Right Cessation
- 1976-02-27 MX MX100239U patent/MX3354E/en unknown
- 1976-02-27 AU AU11481/76A patent/AU497363B2/en not_active Expired
- 1976-02-27 CA CA246,792A patent/CA1055105A/en not_active Expired
- 1976-02-27 BR BR7601251A patent/BR7601251A/en unknown
- 1976-03-01 NL NL7602086A patent/NL7602086A/en not_active Application Discontinuation
- 1976-03-01 DE DE2608436A patent/DE2608436C2/en not_active Expired
- 1976-03-02 ES ES445704A patent/ES445704A1/en not_active Expired
- 1976-03-02 FR FR7605898A patent/FR2302788A1/en active Pending
- 1976-03-02 GB GB8344/76A patent/GB1544105A/en not_active Expired
- 1976-03-03 ZA ZA761276A patent/ZA761276B/en unknown
- 1976-03-03 JP JP51023062A patent/JPS5743062B2/ja not_active Expired
- 1976-03-30 SU SU762334803A patent/SU876051A3/en active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2253601A1 (en) * | 1972-11-02 | 1974-05-16 | 8601 Steinfeld | PROCESS AND EQUIPMENT FOR ELECTRONIC DUST SEPARATION |
| US3849670A (en) * | 1973-04-13 | 1974-11-19 | Webster Electric Co Inc | Scr commutation circuit for current pulse generators |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA761276B (en) | 1977-02-23 |
| JPS51110774A (en) | 1976-09-30 |
| SE408761C (en) | 1986-07-14 |
| FR2302788A1 (en) | 1976-10-01 |
| GB1544105A (en) | 1979-04-11 |
| AU497363B2 (en) | 1978-12-07 |
| DK84975A (en) | 1976-09-04 |
| BR7601251A (en) | 1976-09-14 |
| SU876051A3 (en) | 1981-10-23 |
| SE408761B (en) | 1979-07-09 |
| DK150012B (en) | 1986-11-17 |
| JPS5743062B2 (en) | 1982-09-11 |
| DE2608436A1 (en) | 1976-09-16 |
| MX3354E (en) | 1980-10-10 |
| DE2608436C2 (en) | 1985-11-14 |
| AU1148176A (en) | 1977-09-01 |
| CA1055105A (en) | 1979-05-22 |
| NL7602086A (en) | 1976-09-07 |
| ES445704A1 (en) | 1977-06-01 |
| SE7602263L (en) | 1976-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |