JPS60137432A - Method for intensifying ionization of atmospheric current at high temperature - Google Patents

Abstract

PURPOSE:To intensify the ionization of titled atmospheric current by impressing high voltage across an annular blade type electrode and a counter electrode which is arranged oppositely to the blade type electrode and generating corona discharge in an atmospheric current at high temp. CONSTITUTION:The gas at high temp. of which ionization is intensified is discharged as an atmospheric current at high temp. to the inside of a conduit 2 from an outlet of exhaust pipe 1. High voltage sent from an electric power source is impressed across an annular blade type electrode 3 provided around the exhaust pipe 1 and a counter electrode 4 which is arranged oppositely for the electrode 3 at the downstream side of the inside of the conduit 2 and corona discharge is generated between both the electrodes 3, 4 thereby. By this method, the ionized molecules contained in the gas are intensified further.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for enhancing ionization of high-temperature airflow, and in particular, the present invention relates to a method for enhancing ionization of high-temperature airflow. This invention relates to a method for enhancing wave ionization.

Various methods have already been proposed and implemented for collecting fine particles such as ash and soot floating in exhaust gas and other high-temperature gases, and for re-burning high-temperature gases, but the present invention is extremely simple. This has been made possible through the following means.

That is, in the method of the present invention, a high voltage is applied between an annular blade-shaped electrode disposed around an outflow port of a high-temperature air flow and a counter electrode disposed opposite to the above electrode on the downstream side of the annular blade-shaped electrode, thereby creating a voltage between the two electrodes. The method is characterized in that a corona discharge is generated in the high-temperature air wave, thereby strengthening the ionization of the high-temperature air flow.

The method of the present invention will be explained in more detail below with reference to the drawings.

The high-temperature gas whose ionization is enhanced by the present invention is mainly combustion gas in engines and other combustion devices,
These gases are discharged as a hot air stream into a conduit 2 from the outlet of a discharge pipe 1 as shown in FIG. Above discharge pipe 1
An annular blade-shaped electrode 3 disposed around the electrode 3 and a counter electrode 4 disposed opposite the electrode 3 on the downstream side in the conduit 1 are connected to each other by applying a high voltage from a power source 5 between them. This is to generate a corona discharge between 4 and 4. In order to prevent the annular blade-shaped electrode 3 from being excessively heated by high-temperature airflow, it is desirable to have cooling air channels 6 and 7 interposed between the inside and outside of the annular blade-shaped electrode 3. Further, the counter electrode 4 is made of, for example, a stainless acid wire mesh.

In this way, a high voltage is applied between the annular blade-shaped electrode 3 disposed around the outlet of the high-temperature airflow and the counter electrode 4 disposed opposite the above-mentioned electrode on the downstream side of the annular blade-shaped electrode 3, and the high-temperature air flowing between the two electrodes is applied. When generating a corona discharge in an air flow, the gas flowing through the flow path is ionized at high temperature, so it has conductivity, and the counter electrode 4 is moved from the annular blade-shaped electrode 3 to about IO times its diameter. It becomes possible to make a large separation. The corona discharge further strengthens the ionized molecules in the high temperature gas in the flow path. That is, the entropy of the hot air flow leaving the discharge tube 1 and passing through the conduit 2 increases the energy of the disordered motion of the molecules due to the increase in the discharge current, thereby increasing the temperature of the flowing gas, and - as mentioned above. At the same time as strengthening the ionized molecules, ash, soot, and other particulate matter in the air stream are polarized, allowing them to be captured electrostatically. In order to capture this particulate matter, an electrode plate for capturing charged to charged particulate matter is provided downstream of the counter electrode 4 in the conduit 2, and this is grounded or held in the opposite polarity to the charged particulate matter. do it.

Furthermore, as mentioned above, by strengthening the ionized molecules in the gas flowing through the flow path and promoting active activity, the temperature of the gas rises, so it can be effectively used for reburning the combustion gas. I can do it.

Furthermore, in order to strengthen the ionization, as shown in FIG. By adjusting the resistor 9.10 connected to the electrode 4, a current can be drawn through the electrode 8 and, with the intervention of the resistor 9 mentioned above, a voltage can be generated.

In the above-mentioned corona discharge in the high-temperature air flow, the heating of the gas in the gas-ion flow is determined by the electrolytic strength in wood terms, and the flow strength is influenced by the characteristics of the ion mobility of the flow and the average electrolytic strength. Thus, electrical discharges in the airflow create either negative or positive polarity, increasing the average consumption of energy in the passageway gas and increasing the volume of the gasflow flowing through the passageway; The difference will occur depending on the intensity of the discharge current.

In strengthening the ionization of high-temperature airflow by such a method, the annular blade-shaped electrode 3 has its own characteristics, that is,
The generation of positive brush corona is suppressed, the state of glow corona remains, the discharge voltage is high despite the formation of a significantly unequal electric field, it is not affected by humidity, and the electrode spacing is adjusted to the channel diameter. The characteristics of the discharge characteristics do not change even up to about 10 times that of the current, are ineffective against impact voltage, and can produce a large corona current, which are utilized in the high-temperature gas flow path.

Next, an experimental example using the apparatus shown in FIG. 1 will be described.

The device used in the experiment had an annular blade-shaped electrode with an inner diameter of 25 mmφ and a counter electrode facing it with an electrode spacing of 12 cm. 90,000 combustion scum was passed through the annular blade-shaped electrode at a wind speed of 8.713 m/sec. It was supplied by facing,
” 140 by applying a voltage of 10 kV between the annular blade-shaped electrode and the counter electrode to generate corona discharge.
A discharge current of pA flowed, the combustion scum temperature was raised to 850° C., and a wind speed of 12.538 m/sec (1) was obtained. Note that it is possible to further increase the voltage applied between the electrodes, thereby further strengthening the ionization of the high-temperature gas in the flow path.

Further, FIG. 2 shows the relationship between the voltage applied between the annular blade-shaped electrode and the counter electrode and the current generated in the illumination extraction electrode disposed between these electrodes.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an apparatus for implementing the present invention, and FIG. 2 is a diagram of an experimental example related to the present invention. 3...Annular blade-shaped electrode, 4...Counter electrode.

Claims (1)

[Claims] 1. A high voltage is applied between an annular blade-shaped electrode arranged around the outlet of the high-temperature air wave and a counter electrode arranged opposite to the above-mentioned electrode on the downstream side of the annular blade-shaped electrode, and the high-temperature air flow between the two electrodes is applied. A method for enhancing the ionization of a high-temperature airflow, the method comprising: generating a corona discharge, thereby enhancing the ionization of the high-temperature airflow.