GB404635A - Method of and means for electrically purifying gases - Google Patents
Method of and means for electrically purifying gasesInfo
- Publication number
- GB404635A GB404635A GB1924732A GB1924732A GB404635A GB 404635 A GB404635 A GB 404635A GB 1924732 A GB1924732 A GB 1924732A GB 1924732 A GB1924732 A GB 1924732A GB 404635 A GB404635 A GB 404635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- discharge
- impulse
- condenser
- electrodes
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
Abstract
<PICT:0404635/III/1> In the process described in the parent Specification for the separation of suspended particles in gases by means of potential impulses of short duration, the duration of the individual impulses is kept so short that the negative ions proceeding from the discharge electrode can only just reach the surface of the collecting electrodes or points immediately in front of them. Preferably a sufficient time interval is allowed after each impulse to allow the surface charge which accumulates on the dust layer of the collecting electrode to disperse before the arrival of the next impulse, thus preventing the formation of positive brush discharges on the collecting electrode. The duration of the impulse discharge is related to the velocity of the ions in the gas and the distance between the electrodes, e.g. if the distance between the discharge and collecting electrodes is 6 cm. and air containing dust in which the velocity of negative ions is 60 metres per second is passed between them, each voltage impulse must last not longer than 10-<3> seconds. The time interval between impulses depends upon the resistance of the dust layer and may be for example one hundredth or one fiftieth second or even longer. The velocity of negative ions is stated to be about 280 metres per second in hydrogen, about 36 metres per second in carbon dioxide and about 16 metres per second in sulphur dioxide. The increase of the voltage impulse is preferably made so sudden that the voltage increase from zero to maximum occurs in about 10-<6> seconds, and preferably with a steep wave front, thus allowing the use of potentials which are approximately 30--100 per cent above the highest potential possible when using continuous direct current. During the intervals between the impulses, the potential applied to the discharge electrodes is preferably kept below the discharge limit. According to the arrangement shown, the discharge electrode 2 is supplied with impulse potentials by means of a spark-gap 5 and earthed condenser 10 interposed in the supply from transformer 8 and rectifier 6. Chokes 11 and 12 and condenser 14 are provided to prevent transference of high frequency oscillations through the supply line. Disruptive discharges are prevented by means of an auxiliary spark-gap 16 and condenser 17 connected in parallel with the electro-filter, the spark-gap 16 functioning by means of an igniting electrode 19 connected to the discharge electrode 2 through a condenser 20 and resistance 21 before a disruptive discharge occurs. The condenser 17 discharges through a resistance 18 leaving a sufficient charge on the electrodes of the filter to ensure the separation of the dust particles. The process may also be employed for the production of chemical reactions in gases.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1924732A GB404635A (en) | 1932-07-07 | 1932-07-07 | Method of and means for electrically purifying gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1924732A GB404635A (en) | 1932-07-07 | 1932-07-07 | Method of and means for electrically purifying gases |
Publications (1)
Publication Number | Publication Date |
---|---|
GB404635A true GB404635A (en) | 1934-01-08 |
Family
ID=10126178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1924732A Expired GB404635A (en) | 1932-07-07 | 1932-07-07 | Method of and means for electrically purifying gases |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB404635A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1002738B (en) * | 1953-06-23 | 1957-02-21 | Westinghouse Brake & Signal | Circuit for distorting the waveform of an alternating voltage |
US3350849A (en) * | 1966-03-08 | 1967-11-07 | Metallgesellschaft Ag | System for preventing arc re-ignition in electrostatic dust separators |
DE2341541A1 (en) * | 1972-08-17 | 1974-03-07 | High Voltage Engineering Corp | METHOD AND EQUIPMENT FOR ELECTROSTATIC PARTICULAR DEPOSITION |
US4183736A (en) * | 1972-08-17 | 1980-01-15 | High Voltage Engineering Corporation | Electrostatic precipitation |
-
1932
- 1932-07-07 GB GB1924732A patent/GB404635A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1002738B (en) * | 1953-06-23 | 1957-02-21 | Westinghouse Brake & Signal | Circuit for distorting the waveform of an alternating voltage |
US3350849A (en) * | 1966-03-08 | 1967-11-07 | Metallgesellschaft Ag | System for preventing arc re-ignition in electrostatic dust separators |
DE2341541A1 (en) * | 1972-08-17 | 1974-03-07 | High Voltage Engineering Corp | METHOD AND EQUIPMENT FOR ELECTROSTATIC PARTICULAR DEPOSITION |
US4183736A (en) * | 1972-08-17 | 1980-01-15 | High Voltage Engineering Corporation | Electrostatic precipitation |
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