JP2013010088A - Magnetic decomposition treatment apparatus for organic matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic decomposition treatment apparatus for waste organic matter whose purpose is to improve the treatment efficiency of magnetic decomposition treatment apparatus for organic matter.SOLUTION: The apparatus includes an organic matter input port with a seal lid at the top of a cylindrical treatment tank, and a magnetic air blowing nozzle is arranged at the lower part to decompose the organic matter stored inside the treatment tank by magnetic air. At least two sidewalls of the treatment tank are triple-wall via small gaps, and a plurality of small holes to pass the decomposition gas are provided on the inner wall of the triple-wall. The small gap continuous with the small holes is a gap for a downward passage for the decomposition gas, and the top and bottom of the gap outside of it is open and the gap is made to be a gap for circulation of the decomposition gas.

Description

  The present invention relates to a waste organic matter magnetic decomposition treatment apparatus for the purpose of decomposing waste organic matter with air that has passed a strong magnetic field.

  Conventionally, several proposals have been made for low-temperature magnetic decomposition treatment of organic waste, and there are some devices that have reached practical use, but most of the devices are still being used and are widely used in industry. The area has not been reached.

JP 2008-190733 A Japanese Patent No. 433712 JP 2010-270980 A

  As described above, there are many proposals regarding the magnetic decomposition treatment of waste organic matter. For example, a method and an apparatus have been proposed in which an active hot gas in which oxygen at 250 ° C. to 400 ° C. is limited is blown into waste organic matter to decompose the organic matter (Patent Document 1).

  Also proposed is a low-temperature decomposition treatment apparatus in which magnetized air is supplied to the lower part of the organic matter to be treated, the decomposed gas is lowered, and the organic matter is decomposed by vertically convection with the magnetized air. (Patent Document 2).

  Furthermore, there is also a proposal of a low-temperature pyrolysis furnace that decomposes air that has passed through a magnetic field by bringing it into contact with organic matter (Patent Document 3).

  Each of the above inventions has its own characteristics and is recognized as being feasible, but it is still considered insufficient in terms of improving the efficiency of magnetic decomposition.

  In each of the above inventions, one of the reasons why it is difficult to improve the processing efficiency is that a large amount of water is generated during magnetic decomposition, and it is recognized that a large amount of energy is lost when vaporized or discharged as fine water. It is.

  The object of the present invention is to improve the processing efficiency by separating and removing moisture in the magnetic decomposition gas.

  The present invention pays attention to the fact that a large amount of fine water particles are contained in the gas generated by the magnetic decomposition, and the water particles in the descending gas are separated by lowering and cooling the water particles along the side wall. , Succeeded in changing to water droplets.

  That is, since the atmospheric pressure in the upper part of the apparatus inevitably increases due to decomposition of the waste organic matter, the side wall of the apparatus is a triple wall with a small gap, and a large number of small holes are provided in the innermost wall. Then, using the difference between the upper and lower atmospheric pressures, the moisture-containing gas is lowered and the moisture is separated by lowering the temperature of the descending gas.

  When the organic matter is decomposed, the inside of the apparatus becomes about 100 ° C. to 300 ° C. due to the heat of decomposition, and the moisture contained in the organic substance rises with the decomposed gas as water vapor. To do.

  The apparatus is, for example, a rectangular tube-shaped treatment tank, and an upper end portion is an organic substance inlet, and the inlet is sealed with an open / close lid. The upper part and the center part of the treatment tank are organic substance storage parts, which are organic substance decomposition treatment parts. In addition, the lower inner side is an accumulation place of ash and a plurality of nozzles for blowing magnetized air are installed.

  The nozzles are evenly arranged on the bottom plate so as to uniformly blow magnetized air to the lower part of the organic matter contained. Since ash accumulates on the bottom plate, it is necessary to consider that the nozzle is not buried in the ash.

  The treatment tank according to the present invention has a triple wall around the four sides and a small gap between the walls, and serves as an exhaust path for lowering the exhaust body rich in water vapor and the exhaust body rich in cracked gas. A large number of small holes are formed in the innermost side wall, and water vapor and decomposition gas are automatically sucked, lowered in the exhaust passage, and cooled to form water vapor as water droplets. In the above, since the upper part in the processing tank is at high pressure and the lower part is at low pressure, the small gap inevitably becomes a passage for the descending gas, and circulates and flows with the ascending gas in the central part.

  Since the decomposition by the magnetized air is a chemical change, heat of decomposition is generated and the temperature is approximately 200 ° C to 350 ° C. In other words, the organic matter is magnetically decomposed upon contact with the magnetized air, but is heated by decomposition heat (for example, 200 ° C. to 350 ° C.), so that the magnetic decomposition is accelerated by the heating.

  When the air decomposed as described above rises in the tank and reaches the opening / closing lid, the air descends along the small gap on the outer wall side and is exhausted as it is from the lower part of the tank. Moreover, a part of the exhaust gas rises along the blowing direction of the nozzle, contacts the organic matter together with the magnetized air, and decomposes it. In the above, since the organic matter descends due to its own weight, it is inevitably mixed and stirred, but if a stirrer is provided, it can be stirred reliably and evenly.

  The magnetized air passes through a strong magnetic field (for example, 0.4 Tesla or more) and is sucked into the tank. In this case, if the suction amount and suction pressure are controlled using a fan, the amount of magnetized air blown out can be regulated and the progress of decomposition can be controlled. In the present invention, it is an essential requirement to uniformly spray magnetized air onto the organic matter.

  On the other hand, since the lower part of the apparatus has a relatively low atmospheric pressure due to exhaust and blowing of magnetized gas, the gas inside the apparatus is sucked from the small hole in the side wall and automatically descends. And the water vapor | steam cooled by the comparatively low temperature lower part and contained in exhaust_gas | exhaustion becomes a water droplet, and accumulates on the apparatus bottom. The descending gas can also be cooled with moisture.

  That is, even without installing a special device for air-water separation, water droplets are generated by cooling and accumulate in the lower part of the device. Therefore, since the energy for evaporating the water generated as described above is not used, the chemical decomposition proceeds smoothly, and as a result, the processing efficiency of the organic matter is improved.

  In the present invention, a plurality of magnetized air blowing nozzles are equally arranged upward on the bottom plate as described above. Thereby, magnetized air can be made to contact organic substance equally. Since organic substances are originally decomposed when they come into contact with magnetized air, uniform contact is a basic condition. Since the magnetized air is always released upward, the circulating gas flows upward, and both flow in the same direction.

  In the above, the decomposition gas descends along the gap inside the outer wall, and part of it rises as it blows from the nozzle, and again comes into contact with the organic matter to promote its decomposition (circulation flow). In the above, the decomposition gas rises while being heated by the decomposition heat (for example, around 300 ° C.), so that the pressure in the upper part in the tank becomes high. On the other hand, at the lower part in the tank, the atmospheric pressure is lowered by the exhaust to the outside and the blowing action from the nozzle. Therefore, the high-pressure gas in the upper part of the tank passes through the gap to reach the lower part of the low-pressure tank, and inevitably circulates and flows.

  The treatment tank of the present invention is basically a square tube or cylinder, and the square tube is usually square or rectangular in cross section. And the processing tank of the decomposition | disassembly site | part and the distribution | circulation part of a side wall can consider the cross-sectional square or circular shape most normally.

  Next, when the organic matter is charged, the internal gas may be discharged if the opening / closing lid of the treatment tank is opened. (The atmospheric pressure in the normal treatment tank is higher than the normal pressure). Therefore, if a hopper is connected to the upper end opening of the treatment tank, and an opening / closing lid (for example, a slide lid) is installed on the base of the hopper and the upper portion of the hopper, the opening / closing lid is opened alternately, so Exhaust leakage can be prevented in advance.

  Further, the size of the magnetizing device can be easily derived from the relationship between the total amount of magnetized air required for a certain time and the appropriate flow velocity of magnetized air. Since the necessary amount of magnetized air can be calculated in advance, it is necessary to determine the volume of the magnetized air chamber, the flow cross-sectional area of the magnetized air, and the flow velocity from this point. In short, a predetermined amount of magnetized air is uniformly sprayed on the organic matter to be treated.

  In this invention, a rotating shaft is installed at the center of the processing apparatus, and a stirring blade is fixed to the rotating shaft. The agitation blades are attached to a pair of left and right shafts in FIG. 2, and the blades having different directions are fixed to the left and right in FIG. Therefore, the rotation angle, for example, the right and left blades are changed so that the organic matter is moved toward the center when rotated to the right, and the organic matter is moved toward the side wall when rotated to the left. That is, the blade can not only simply agitate but also move the organic substance laterally (parallel to the rotation axis).

  Moreover, the organic substance which contacted can be partially cut | disconnected by attaching a cutting blade to the outer edge of a blade | wing. For example, when a part of the organic material is a synthetic resin bag, unless the bag is torn, the action of magnetized air will slow down, which may be one of the causes of a long decomposition treatment time. .

  Next, in the case of organic substances with a high water content (including chlorine), free water is combined with chlorine to produce hydrochloric acid, which may become a toxic gas. It is necessary to drain. Also from this point, the present invention removes moisture in the cracked gas, so that it is possible to prevent the generation of hydrochloric acid from the cracked gas even if it is an organic substance containing chlorine.

  In the present invention, since a large number of nozzles are used, it is necessary to uniformly send magnetized air to the nozzles. Therefore, as one method, it is conceivable to create a magnetized air chamber having a large capacity and forcibly and quantitatively transfer the magnetized air in the magnetized air chamber with a blower or the like.

  The magnetized air may be injected under pressure, but the speed of the circulating gas is promoted by blowing out magnetized air. It is thought that this is because the accumulated ash is heated, and the rising air flow due to the temperature of the accumulated ash (the temperature at the center is about 200 ° C. to 350 ° C.) is the cause of acceleration of the magnetized air.

  In other words, the force of the circulating flow is considered to be an upward flow caused by blowing out magnetized air and heating ash. Furthermore, the flow of the internal gas is controlled by allowing the air to flow appropriately to the flue, or cooling the exhaust by flowing cold water to the lower part of the treatment tank, thereby lowering the lower atmospheric pressure and adjusting the internal atmospheric pressure. be able to.

  According to the present invention, the water generated by the decomposition is separated as much as possible, and the water required for evaporating the water is saved and used effectively for the decomposition. It has the effect of improving efficiency.

  In addition, a part of the gas generated by the decomposition is lowered with moisture mixed, and the water is separated at the lower part, so the rising gas becomes lighter and rises smoothly with the magnetized air, easily without disturbing the blowing of magnetized air There is an effect that can be mixed.

  Furthermore, since the rise in moisture is small, even a decomposed gas containing harmful substances such as chlorine has an effect of preventing the generation of a harmful liquid (for example, hydrochloric acid) by combining with chlorine and water.

  In addition, if a small hole is provided in at least two side walls, if possible, four side walls, the gas generated by decomposition descends according to the atmospheric pressure from each height, and the change in atmospheric pressure is automatically adjusted. In particular, there is no possibility of generating a high-pressure portion, and the water vapor in the exhaust gas that has descended is cooled and separated as water droplets, so that the atmospheric pressure in the lower tank decreases.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The vertical side view which abbreviate | omitted one part. (A) The cross-sectional top view which abbreviate | omitted one part, (b) The partial cross-sectional enlarged view of a side wall similarly. The front view which abbreviate | omitted a part of Example which similarly installed the hopper in the upper end part of the processing tank.

The present invention accommodates waste organic matter inside the upper part of the cylindrical treatment tank, closes the upper part, and blows out magnetized air to the lower part of the organic matter, whereby the organic matter is sequentially gasified (for example, CO ₂ , H ₂ O). , H ₂ , O ₂ , N ₂ etc.) and ash (inorganic). That is, other than ash is discharged as the gas, but nitrogen in the component may form a compound and emit an odor. In this case, an exhaust treatment is required to treat the odor to a colorless and odorless gas. Become.

  During the treatment with the magnetized air, heat of decomposition is generated, but is approximately 400 ° C. or less. Accordingly, the treatment of organic substances is mainly magnetic decomposition, which is clearly different from combustion. Therefore, due to the heat generated during decomposition (for example, 200 ° C. to 350 ° C.), it is rapidly generated in magnetized air and a gas such as the heated gas or water vapor. Will be disassembled.

  Although the component ratio of the gas produced differs depending on the type of the organic substance, it is clear that the organic substance is decomposed into its constituent components to become a gas, and the solid is only an inorganic substance (ash).

The decomposition rate varies greatly depending on the material, size, magnetic strength, and the like of the organic substance. For example, in the case of magnetized air that has passed through a magnetic field of 0.4 Tesla to 0.6 Tesla and an average size of 3 cm to 5 cm, such as a piece of wood, sawdust, etc., in a conventional apparatus, it takes 3 hours to process 1 m ^3. Although it took 4 hours, it was confirmed that the treatment can be performed in 2.5 to 3 hours when using the apparatus of the present invention. Therefore, an efficiency improvement of 25% on average was expected. If the flow state of the decomposition gas and the water vapor are treated, further improvement in efficiency is expected.

  Moreover, when 20% (weight) of radioactive soil was mixed in the organic matter, the radioactivity of ash was reduced to 1/10 or less at the end of the treatment. Therefore, it was confirmed that the radioactivity was reduced with the magnetic decomposition. Regarding the reduction of radioactivity in the above, a marked difference in the effect was observed between radioactive soil and radioactive organic matter (for example, synthetic resin clothing), but it is presumed to be attributed to the difference in treatment mode. .

  According to the above, since the amount of heat released because the gas to be exhausted as water vapor becomes water droplets and the latent heat when it becomes water droplets work effectively, heat loss during chemical decomposition is reduced, It is estimated that the decomposition efficiency was improved by the amount.

  An embodiment of the present invention will be described with reference to FIGS. An inner wall 2 and 3 are sequentially provided in a rectangular tubular outer wall 1 made of a steel plate via small gaps 1a and 1b to constitute a triple cylinder main body 5.

  On the inner bottom plate 4 a of the main body 5, magnetized air blowing nozzles 6 and 6 are arranged. The blow-out nozzles 6 and 6 are intended to blow the magnetized air evenly onto the lower surface of the organic matter 7 to be processed, and therefore are arranged equally according to the number of blow-off nozzles.

  The blowing nozzles 6 and 6 are connected to a magnetized air chamber 26 via pipes 25 and 25, respectively. The magnetized air chamber 26 is connected to a magnetized chamber 28 via a pipe 27. In the figure, 29 is a suction pipe of the magnetization chamber 28. In the magnetization chamber 28, a ferromagnetic material is installed oppositely through a small gap to constitute a strong magnetic field. The air sucked by the suction pipe 29 passes through the strong magnetic field of the magnetization chamber 28 and is sent to the magnetized air chamber 26 through the pipe 27. Therefore, the air is sent from the magnetized air chamber 26 to the blowing nozzles 6 and 6 through the pipe 25. A blower 40 is interposed between the magnetized air chamber 26 and the pipe 25 to adjust the blowing pressure.

  The inner wall 3 is provided with a large number of small holes 8 on the top, bottom, left and right. There is no restriction on the size of the small hole 8, but it is a requirement that the small hole 8 is not blocked by entering a small piece of the organic substance 7 accommodated inside the inner wall 3 (processing space). Therefore, for example, rectangular small holes (launch holes) having covers 8a and 8a as in the embodiment are preferable.

  That is, since the covers 8a and 8a cover the small holes 8 and 8, there is no possibility that a small piece of the organic substance 7 enters the small holes 8 and 8 and there is no possibility that the small hole 8 is blocked by the small pieces. In the figure, 10 is a processing apparatus of the present invention, 19 is a residue inspection port, 20 is an ash inspection port, and 21 is an open / close lid. The opening / closing lid 21 is opened / closed about a shaft 49. In the figure, 47 is a handle of the opening / closing lid 21, and 48 is a locking ring for fixing the handle 47.

  In the central part of the main body 5, in the side view, the rotary shafts 30 and 30 are horizontally installed at predetermined intervals to the left and right of the center, and the stirring blades 31 and 32 are left and right in FIG. Fix each one. The agitation blades 31 and 32 are inclined in reverse directions, and agitate and move organic substances as indicated by arrows 33 and 34 or 35 and 36 as the rotation shafts 30 and 30 rotate. Accordingly, the organic matter that contacts the stirring blades 31 and 32 is brought close to the central portion as indicated by arrows 33 and 34, or is moved toward the side wall as indicated by arrows 35 and 36 and greatly stirred.

  Further, blades 31a and 32a are provided on the outer circumferences of the stirring blades 31 and 32 (FIG. 2), and the organic matter in contact with the blades is cut. For example, since the synthetic resin bag or an approximation of the synthetic resin bag is shredded by 31a and 32a, it contacts evenly with magnetized air and promotes decomposition. Usually, the organic matter contained in the synthetic resin bag begins to decompose after the bag is decomposed, but as described above, if the bag is broken by the blade of the blade, the bag and contents are decomposed at the same time. It is possible to significantly shorten the decomposition processing time. In FIG. 1, reference numeral 46 denotes a motor that rotates the rotary shafts 30 and 30.

  A hopper 45 is connected to the upper part of the main body 5 (FIG. 4), an opening / closing lid 41 is installed between the lower end surface of the hopper 45 and the upper end surface of the main body 5, and the opening / closing lid 42 is connected to the upper end portion of the hopper 45. Install. If the open / close lids 41 and 42 are alternately opened and closed, it is possible to prevent leakage of exhaust gas from the main body 5 (treatment tank).

  That is, when only the opening / closing lid 21 is attached to the upper part of the main body 5 as in the embodiment, every time the opening / closing lid 21 is opened / closed, the decomposition gas in the treatment tank rises and is discharged, and the odor is diffused in the vicinity. As described above, if the hopper 45 is connected to the upper part of the main body 5 and the open / close lids 41 and 42 are provided at the upper and lower ends of the hopper 45, the exhaust from the main body 5 can be discharged to the outside. It can be prevented in advance.

  Therefore, when the organic matter is stored in the hopper 45, the lower opening / closing lid 41 is closed to prevent the exhaust from leaking from the inside of the main body 5, and when the organic matter is put into the main body 5, the upper opening / closing lid 42 is closed. It is possible to prevent the exhaust gas from leaking from the inside of the main body 5. The open / close lids 41 and 42 are normally flattened.

  In the above, although the organic matter in the hopper 45 is moved into the main body 5 depending on the weight of the organic matter, depending on the state of the organic matter, the free fall may be inaccurate. May be erected.

  About the said organic substance input, the clogging of the lower part of the hopper 45 is eliminated, A rotary blade, a roll, and other conventionally well-known means can be employ | adopted.

  In the said Example, although the organic substance 7 normally decomposes | disassembles from a lower side part, the mixture of the gas and water vapor | steam produced | generated by decomposition | disassembly spread | diffuses to the side and upper direction like the arrows 11, 11, 12, and 12. Therefore, the gas that has flowed mainly to the side enters the small holes 8 and 8 from the arrow 12 and descends as indicated by the arrows 14 and 14 (FIG. 1).

  Most of the decomposition gas rises as indicated by arrows 11 and 11 and descends as indicated by arrows 13 and 13. Further, the water and the exhaust gas accumulated in the lower part are discharged to the outside (for example, a chimney (not shown)) as indicated by an arrow 17, and the other parts are raised to the inside as indicated by arrows 18 and 18. Then, it mixes with magnetized air and comes into contact with organic matter to promote decomposition. Although the magnetized air is at a normal temperature (for example, 20 ° C. to 25 ° C.), the decomposition gas is about 100 ° C. to 300 ° C., so that the decomposition of organic substances is promoted by heating. Since the amount of the magnetized air is preferably adjusted, it may be blown out by being pressurized with a blower or the like.

  In FIG. 3, a double circle and a triple circle appear in the nozzles 6 and 6a, and a heater (maximum 300 ° C.) is attached to the triple circle (nozzle 6a). This heater is a heater that is applied for about 5 minutes at the start of decomposition by the apparatus. By energizing the heater, the air in the vicinity is heated to generate an updraft (arrow 18a), so that a rising operation such as burning a newspaper or the like to generate an updraft at the time of rising is unnecessary.

  In the apparatus of the embodiment shown in the figure, if the heater is energized at the same time as the main switch is turned on, the air in the vicinity is heated and an upward air flow is generated. The switch is turned off. Therefore, in normal operation, the manager's attention at the start of operation becomes unnecessary.

  It is presumed that oxygen is activated by the magnetized air (the fine particles in the air are magnetized) to decompose organic substances. Further, since the organic matter is heated by the decomposition heat (for example, the lower surface of the organic matter is 200 ° C. or higher), it is recognized that the decomposition of the magnetized air by the active oxygen is promoted.

  Even if the water content of the organic substance is 50% to 60%, the water content is overwhelmingly high, so that heating and decomposition are inevitably caused, and the generation of water vapor seems to be remarkable.

  If the water vapor is heated to become heated steam and decomposed to generate active oxygen and hydrogen, the decomposition efficiency is remarkably accelerated. In the case of this invention, a part of water | moisture content will be isolate | separated from very much water vapor | steam. This moisture collects on the bottom plate 4 of the main body 5, flows as indicated by an arrow 17, and is discharged out of the processing tank (FIG. 1).

  In the above example, the four side walls of the main body are triple walls, but the improvement of the processing efficiency was also observed when three or two side walls were triple walls.

DESCRIPTION OF SYMBOLS 1 Outer wall 2, 3 Inner wall 4a Inner bottom plate 5 Main body 6 Blowing nozzle 7 Organic substance 8 Small hole 10 Processing apparatus 21 Opening / closing lid 26 Magnetized air chamber 28 Magnetizing chamber 30 Rotating shaft 31, 32 Stirring blades 41, 42 Opening / closing lid 45 Hopper

Claims (8)

  In the apparatus for disposing organic matter contained in the inside of the treatment tank with magnetized air having an organic substance inlet with a sealed lid in the upper part of the cylindrical treatment tank and arranging a blowout nozzle for magnetized air in the lower part, the treatment At least two side walls of the tank are a triple wall through a small gap, and a plurality of small holes are provided on the inner wall of the triple wall to allow the decomposition gas to pass. The small gap continuous with the small hole is a gap for the descending passage of the decomposition gas. An organic matter magnetic decomposition treatment apparatus characterized in that the outer gap is opened to the inside of the tank as a gap for circulating the decomposition gas.   In the apparatus for disposing organic matter contained in the inside of the treatment tank with magnetized air having an organic substance inlet with a sealed lid in the upper part of the cylindrical treatment tank and arranging a blowout nozzle for magnetized air in the lower part, the treatment At least two side walls of the tank are a triple wall through a small gap, and a plurality of small holes are provided on the inner wall of the triple wall to allow the decomposition gas to pass. The small gap continuous with the small hole is a gap for the descending passage of the decomposition gas. An organic matter magnetic decomposition treatment apparatus characterized in that the outer gap is opened into the tank at the top and bottom to circulate the decomposition gas and exhausted from the lower part of the cylindrical treatment tank.   In the apparatus for disposing organic matter contained in the inside of the treatment tank with magnetized air having an organic substance inlet with a sealed lid in the upper part of the cylindrical treatment tank and arranging a blowout nozzle for magnetized air in the lower part, the treatment Triple walls through small gaps are respectively provided on the front, rear, left and right side walls of the tank, and a large number of small holes are provided on the inner wall of the triple wall to allow the decomposition gas to pass therethrough. An organic magnetic decomposition treatment apparatus characterized in that a gap for use is provided, and a gap on the outside of the gap is opened in the tank for circulation of the decomposition gas.   In the apparatus for disposing organic matter contained in the inside of the treatment tank with magnetized air having an organic substance inlet with a sealed lid in the upper part of the cylindrical treatment tank and arranging a blowout nozzle for magnetized air in the lower part, the treatment Triple walls through small gaps are respectively provided on the front, rear, left and right side walls of the tank, and a large number of small holes are provided on the inner wall of the triple wall to allow the decomposition gas to pass therethrough. An organic magnetic decomposition treatment apparatus, characterized in that a gap for use is provided, the gap on the outside thereof is opened to the inside of the tank to be a gap for circulation of decomposition gas, and a cover is provided in the small hole.   5. An organic matter magnetic decomposition treatment apparatus according to claim 1, wherein a rotating shaft is horizontally installed at a central portion of the cylindrical processing tank, and stirring blades are respectively fixed to the left and right of the rotating shaft at predetermined intervals. .   6. The organic matter magnetic decomposition processing apparatus according to claim 5, wherein two rotating shafts are installed in parallel at the same height.   6. An organic matter magnetic decomposition treatment apparatus according to claim 5, wherein a cutting blade is provided on an outer peripheral portion of the stirring blade.   5. An organic matter magnetic decomposition treatment apparatus according to claim 1, wherein a magnetized air chamber is interposed between the blowout nozzle and the magnetizing chamber.