JP5360360B2 - DC Streamer Discharge Device and Toxic Substance Removal Device - Google Patents

Description

Detailed Description of the Invention

The present invention is able to develop a highly efficient harmful substance removal device because of the technical difficulty in obtaining a stable sustained performance in DC current streamer discharge and the difficulty in increasing the power input. It was a method that could solve these problems.

In recent years, environmental problems have attracted attention. Hazardous substance removing devices are necessary for improving the environment, but the power used by the devices themselves and the materials used are also becoming a problem. Rare deodorizers that are mainly used in platinum are rare. There is a problem of metal and power consumption, and immediate improvement is required. It is said that the ability to remove harmful substances by streamer discharge is more than 1000 times as effective as glow discharge at the same power ratio. In addition, the (OH) radicals generated by streamer discharges and (O) radicals generated by ozonolysis treatment oxidize bacteria and kill them. It is a method that can deal with infection prevention as well as the ability to remove harmful substances.

If it is put into practical use as compared with other harmful substance removing devices, the power consumption is about 1/10 to 1 / 100th of the power. This has become important in considering environmental problems. Despite these merits, it was not possible to put it to practical use, as mentioned earlier, it was impossible to obtain a stable sustained performance of streamer discharge by direct current, and power could not be input, in other words processing power It was low. When put into practical use, the manufacturing cost of the power source and the discharge device can be kept low compared to other discharge methods. There is no special processing technology and it can be very simple, and it can be used from small to large processing capacity.

Japanese Patent Application No. 2007-2119014

Problems to be solved by the invention

The conventional DC discharge element structure has a large diameter of about 1 mm with a pointed tip that is arranged without worrying about the distance between the adjacent pins, a plate that is arranged in parallel, or a line that is stretched at the center of the cylinder. It was difficult to put to practical use because stable and stable discharge performance could not be obtained. By considering the overall structure of the discharge element pin configuration, pin fixing method, discharge element pin and arrangement, and the device itself processing capacity in view of the conventional technology, the stable sustained performance of DC streamer discharge that could not be achieved before And with the increase of the current input amount, high efficiency removal of harmful substances from bacterial treatment has become possible.

Even if the tips of pins having a diameter of about 1.0 mm are bent and arranged, a stable streamer discharge cannot be obtained. As a result of diligent examination of the pin configuration and fixing method for achieving stable sustainability of streamer discharge with direct current, the shape of the pin of the discharge element has a diameter or width and a thickness of 0.5 mm or less, and there is always a gap between the pins. The distance between the pins is about 20 times the diameter of the pins, and the tips are fixed in series as shown in FIG. 3 so that the tips do not contact each other. A plurality of discharge elements 5 which are arranged in series are attached to the rotary 6. 13 guide cylinders centering on the rotary are arranged. The length of the pin is such that the dimension of 19 from the plate 21 to be fixed is 5 mm or more. A fan 1 is arranged at the outlet to allow high-speed airflow. By reducing the pin diameter and pin spacing, the cooling effect is enhanced to prevent the electrode surface temperature from rising, and at the same time, the drift due to the electric field of ions can be suppressed, and the DC streamer discharge can be maintained stably. I can do it. The ideal pin shape is recommended to be 0.15 mm or less in diameter, width, or thickness. (Pin diameter, arrangement, length, fixing method)

The shape of the discharge pin 18 is not bent at the tip but is cut at 90 degrees. If the tip is sharpened, wear due to electric discharge is accelerated. Also, it becomes difficult to work when polishing the tip. Also, if the pin is thick, the discharge condition becomes better as the pin becomes as thin as possible, but the discharge condition is better, but durability and elasticity are required, and the pin diameter is limited by the material (pin shape condition).

The arrangement of the discharge element for maintaining the discharge performance is such that the tip of the pin of the discharge element 5 mm or more and 5 away from the inner surface of the 13 cylinders on the counter electrode surface. Further, the voltage applied to the discharge element from 12 is applied 5 KV or more. Except for this condition, the discharge is unstable and the amount of current does not increase. Moreover, it becomes unstable even if a voltage is applied too much. The condition that the discharge distance / voltage is 1.2 or less is also required. (Discharge element input voltage and placement conditions)

By disposing the 6 rotarys with the discharge element 5 attached to the center of the cylinder, the discharge element can be easily removed and replaced in a batch when the discharge element deteriorates, thereby maintaining the performance. As a structure that can be easily removed, the current intake electrode shaft 4 is arranged at the center of the rotary, and the current is collectively supplied to the discharge element through the electrode spring plate 17 and the current distribution connecting plate 11. (Removable structure)

Dirt on the electrodes of the discharge element causes a decrease in the discharge current, which must be cleaned regularly to maintain cleanliness. The discharge pin cleaning plate 9 of cloth or plate coated with abrasive is fixed to the rotary outer cylinder 113 with a thin spring plate 10 by taking advantage of the feature of rotating the cylindrical rotary discharge device. Further, since the pins are not bent during cleaning, the pin guide plate 26 is installed in parallel with the discharge element. By rotating the rotary 6, the tip of the electrode pin can be polished to prevent a decrease in current. (Pin cleaning structure)

In the case of streamer discharge, a discharge sound is emitted during discharge. Various methods for reducing the sound have been announced, but as a result of diligent investigation, it was found that the sound is reduced by making the pin thinner. In comparison of the sound produced when the diameters of the pin 18 of the discharge element are 1.0 mm and 0.15 mm, when the diameter is 0.15 mm, it becomes about one third or less. This comes from the difference in the amount of discharge from one pin. If the amount of discharge is the same, it is possible to reduce the sound by arranging a large number of thin pins, dispersing the amount of discharge, and making the total amount of discharge the same amount of discharge. (Pin shape and arrangement to make the sound quiet)

Smoke or the like causing dirt on the cylinder 13 is charged to (+) and attracted to the (-) electrode, and the (-) electrode side becomes the cylinder 13 side, so the cylinder becomes dirty. In order to remove this dirt, a photocatalyst is applied to the inside of the tube 13. The photocatalyst is excited by ultraviolet rays emitted from the streamer discharge and decomposes dirt. (Prevents dirt from the tube)

In the case of a wire rod, the discharge element is processed by using 24 jigs so that the coil is placed on the intermediate plate 22 as shown in FIG. However, it is different from the winding method of the coil that it is necessary to wind the wire from one to several diameters. When the winding is completed, the wound discharge element is fixed by the both-side fixing plate 21 so that the wound wire (pin) is not displaced. The wound coil-shaped discharge element is pulled out and cut at 23 portions to the designated pin length. (Coil form processing method)
When pressing a plate Prepare a plate with the same pin thickness as the specified pin thickness, and press the pin plate pressed in the same way as a wire rod that is pressed with the same distance as the wire rod and the same length as the wire rod. The plate 22 is sandwiched and both side surfaces are sandwiched and fixed by 21 fixing plates. (Pin processing by press working)

First, (OH) radicals, ozone and the like are generated in the radical generation space of 27 at the time of streamer discharge and are subjected to an initial stage treatment for oxidizing harmful substances, bacteria and the like. In order to activate the photocatalytic filter 2 in the absence of ultraviolet rays, the ozone decomposition filter 3 is disposed in front of the photocatalytic filter. The ozone passing through the cylinder 13 is decomposed by an ozone decomposition filter. At that time, ozone is decomposed to generate active species (O). The active species (OH) and the active species (O) that have not been treated with harmful substances pass through the photocatalyst filter and excite the photocatalyst. With these two types of catalytic filter effects, it is possible to remove harmful substances again to increase efficiency. Further, by arranging this arrangement in series with the treatment concentration of the treatment substance as shown in FIG. 7, it is possible to approach the complete treatment of harmful substances by arranging them in double or by combining a plurality of them in series. (High efficiency removal method of harmful substances by combining streamer discharge, ozonolysis filter and photocatalytic filter)

Effect of the invention

Conventionally, DC streamer discharge was said to be a method suitable for removing a large amount of harmful substances, but the stability of the discharge was lacking, and at the same time, there was a limit to the amount of current input, and there was a problem in practical use. Stable sustainability of the discharge and the amount of input current can be increased freely by the features of the cylindrical rotary, the structure of the pin, and the arrangement. At the same time, the combination of the two types of catalytic filters increased the removal efficiency of bacteria and harmful substances. In addition, the discharge element can be easily replaced, cleaning of the discharge element can be automated, maintenance becomes difficult, and practical use is further approached.

  It is the figure which looked at the harmful substance removal apparatus main body from the top.   It is sectional drawing which looked at the harmful substance removal apparatus main body from the side.   It is a side view of a discharge element.   It is an enlarged drawing of a discharge element pin part.   It is the figure which looked at the discharge element from the top.   It is the side view wound in the shape of a coil.   It is the figure which arranged the hazardous substance removal apparatus main body in series.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exhaust fan for process gas 2 Photocatalyst filter 3 Ozone decomposition catalyst filter 4 Current supply electrode shaft 5 Discharge element 6 Discharge element attachment rotary 7 Rotary drive motor 8 Body case 9 Discharge element pin cleaning plate 10 Cleaning part attachment spring plate 11 Current Distribution connecting plate 12 DC high voltage current inlet (+) electrode 13 Rotary guide cylinder 14 DC high voltage current inlet (-) electrode 15 Rotary mounting screw 16 Gas flow direction 17 Electrode spring plate 18 Discharge pin 19 Pin length 20 Pin distance 21 Pin fixed side plate 22 Pin placement fixed intermediate plate 23 Pin winding cut position 24 Pin winding jig 25 Pin winding 26 Pin warp prevention plate 27 Radical generation space

Claims (1)

A discharge element provided with a plurality of discharge pins, a rotatable rotary for attaching the discharge elements from the outer periphery to the outer side, and a cylindrical shape for accommodating therein the plurality of discharge elements attached to the rotary and a body case of the inner surface of the main body case constitutes a counter surface of the discharge device, the main body case, the counter electrode surface discharge pin cleaning plate made of a thin spring plate in the rotary shaft in the same direction of the rotary hazardous substance removing device characterized in that provided.

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