KR100868231B1 - Pyrolysis furnace - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a pyrolysis furnace in which pyrolysis of various wastes proceeds efficiently at 300 ° C. or lower while suppressing the occurrence of dioxins and odors, and can advantageously suppress the resynthesis reaction of dioxins.

The pyrolysis furnace of the present invention for achieving the above object is a pyrolysis unit (1) and the gas discharged from the pyrolysis unit (1) to decompose the waste to be discharged into the gas in the space separated from the external space with a heat insulating wall Aeration in the water is made of a bubbling tank (35, 36) to be exhausted after the harmful substances are absorbed in the water. A pyrolysis section (1) which is blocked from an external space and formed of a refractory brick, a pyrolysis air inlet (4, 5) provided in a wall portion of the pyrolysis section to blow air into the pyrolysis section as a natural intake, and the air inlet By magnetically forming the magnetic field on the inlet air limiting means 17 for restricting the flow of air into the pyrolysis section by tightening, and an air passage for inducing air at the pyrolysis section at the air inlet to magnetically treat the air for pyrolysis. A plurality of pairs of magnets (15), waste support means (6, 7) for supporting wastes in a grill on a shelf inside the heat-resistant container, an exhaust gas discharge port (3) provided at a wall of the pyrolysis section, The apparatus 23 for removing harmful substances which aeration and exhaustion of the exhaust gas discharged from the exhaust gas discharge port in a water tank, and eggs such as dioxins and prolons contained in the exhaust gas. ) Characterized in that it comprises a catalyst (19) for adsorbing and decomposing substances, exhaust means for exhausting the exhaust gas into the atmosphere by the fan section (24).

Pyrolysis Furnace, Bubbling Tank, Below 300, Dioxin, Catalytic System

Description

{Pyrolysis furnace}

1 is a front view in which one half of the pyrolysis furnace according to the present embodiment has a cross section.

2 is a side view of a pyrolysis furnace according to the present embodiment.

3 is an overhead view of the pyrolysis furnace according to the present embodiment as seen from above.

Fig. 4 (a) is a cross sectional view of the air intake opening to the pyrolysis furnace according to the present embodiment, and (b) is an example in which the number of magnetic poles forming a magnetic field with respect to the air passage is composed of two, (c) Is an example in which the number of magnetic poles forming a magnetic field with respect to the air passage is four.

FIG. 5 is a diagram showing a removal apparatus for toxic substances in which waste gas discharged from a pyrolysis furnace according to the present embodiment is detoxified and exhausted to the atmosphere.

[Description of the code]

1. Pyrolysis unit 2. Refractory brick 3. Exhaust gas outlet

4. Upper air inlet 5. Lower air inlet 6. Upper waste support

7. Lower waste support means 8. Checking slot 9. Waste inlet

10. 1st door 11. 2nd door 12. 2nd door handle 14. Magnet mounting part

15. (a, b, c, d) magnets 17. Inlet air restriction means 18. Heating elements

19. Catalyst system 20. Filter part 22. Activated carbon part

23. Hazardous substance removal treatment device 24. Fan part 25. Outlet of exhaust gas outlet

26. Discharge pipe outlet 27. Discharge pipe 28. Air passage

30. Upper heat transfer section 31. Lower heat transfer section 35. 36 Bubbling bath

40. Smoke passage forming inverted U shape 50. Pyrolysis furnace

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pyrolysis furnace, and more particularly, to a pyrolysis furnace capable of pyrolyzing various wastes while suppressing the generation of dioxins and odors.

Recently, from the viewpoint of environmental protection, generation of dioxins due to waste incineration has become a big problem.

Although there are many isomers in these dioxins, typical examples are PCDD (polybenzoic dioxins) and PCDF (polybenzoic chlorides), which are classified into various types by the number of substitution of Cl (chlorine).

Regarding the mechanism in which dioxins are generated in a pyrolysis furnace, unpyrolyzed organic substances due to pyrolysis or incomplete pyrolysis of organic matter in wastes are contained on the fly ash surface of flue gas. Occurs by catalysis such as Alternatively, polycyclic aromatic hydrocarbons (many of naphthalene, anthracene, clichene, pyrene, phenanthrene, etc.) generated by pyrolysis are decomposed by catalysis or flammable gas generated by pyrolysis is reacted with chlorine by catalysis. It is assumed that this is a precursor called chlorophenol (C ₆ H ₃ Cl ₃ O), which produces dioxins such as PCDD by a condensation reaction.

Usually, in pyrolysis treatment, waste is pyrolyzed above 850 ° C, so that hardly decomposable organic substances (dioxin) are generated. However, a large amount of dioxin precursor is contained in the exhaust gas, and when the exhaust gas is cooled due to heat recovery, dioxins are resynthesized because the resynthesis temperature of dioxins of the dioxin precursor is 300 ° C to 400 ° C.

In a conventional pyrolysis furnace or a pyrolysis method, as disclosed in Japanese Patent Laid-Open No. 2002-307045, waste is treated under a low oxygen atmosphere, and the exhaust gas is cooled by a cooler at high speed. The temperature range (300-400 degreeC) which dioxin recombines is made to pass instantaneously, and it is made not to generate | occur | produce as much as possible the resynthesis reaction of dioxin.

However, in the conventional pyrolysis furnace or the pyrolysis method, in order to prevent resynthesis of dioxins, waste is treated under a low oxygen atmosphere, and the dioxin precursor contained in the exhaust gas is rapidly cooled by a cooler. By passing through the temperature range (300-400 degreeC) which dioxins recombine instantaneously, it prevents a resynthesis reaction as much as possible.

However, although the dioxin precursor contained in exhaust gas is instantaneous at the time of cooling, since it passes through the temperature range (300-400 degreeC) which resynthesizes, it is impossible to prevent recombination of dioxins completely. Moreover, since it is necessary to install a cooling facility, the problem of the enlargement of an apparatus also arises incidentally.

An object of the present invention is to provide efficient pyrolysis of waste at 300 ° C. or lower, and to provide a pyrolysis furnace that advantageously suppresses the resynthesis reaction of dioxins.

An object of the present invention is to decompose the waste into the space separated from the outer space by the thermal insulation wall and to discharge the gas, and the aeration of the gas discharged from the pyrolysis in water to absorb the harmful substances into the water after It is made by a pyrolysis furnace including a bubbling tank to exhaust.

Hereinafter, the configuration and the preferred embodiment of the present invention will be described in detail with reference to FIGS.

The present invention is a thermal decomposition unit (1) for decomposing waste discharged into the space separated from the external space by a heat insulating wall and discharged as a gas, aeration of the gas discharged from the thermal decomposition unit in water to absorb harmful substances in the water And then bubbling tanks 35 and 36 to evacuate.

The pyrolysis unit 1 includes air supply means for passing the outer space and the inner space to the lower portion by a heat insulation wall, waste support means 6 and 7 for supporting the waste to be placed at a predetermined position, and waste is placed on the waste support means. It comprises a waste inlet (9) to be introduced, a heat supply means for applying heat to the waste, and an exhaust gas outlet (3) for discharging the pyrolyzed gas.

The air supply means controls the air inlets 4 and 5 through which the outside air is blown in through the insulating wall, the magnet 15 applying the magnetic field to the air flowing through the air inlets, and the air flow rate. It is made to include an inlet air limiting means (17). The magnet 15 is preferably arranged so that two or more magnets face each other toward the air passage.

Waste support means (6,7) is composed of two grills installed in the lower portion of the pyrolysis unit 1, the heat supply means for igniting the waste, the fuel (30, 31, Hereinafter referred to as " heat transfer section " and a heating port 18 for applying heat to the fuel. The waste inlet 9 has two doors, the first door 10 is opened to temporarily settle the waste, and then the first door 10 is closed and the second door handle is pulled to pull the second door 11. It is characterized in that it is configured to open the waste into the thermal decomposition unit (1).

The bubbling tanks 35 and 36 are provided with an outlet portion 25 and an outlet tube outlet portion 26 of the exhaust gas outlet below the water surface, and after the gas introduced into the bubbling tank generates bubbles, the bubbling tanks exhaust the upper portion of the bubbling tank. Is configured to A catalyst system 19 for adsorbing harmful substances contained in the gas discharged from the bubbling tank, a filter unit 20 and an activated carbon unit 22 for purifying the gas passing through the catalyst system, and the gas is discharged into the atmosphere. The fan unit 24 is further provided.

First, FIG. 1 is a front view of one half of the pyrolysis furnace in cross section, and FIG. 2 shows a side view of the pyrolysis furnace. 3 is an overhead view of the pyrolysis furnace viewed from above, and FIG. 4 (a) is a cross-sectional view of each air inlet 4 and 5 which is a means for introducing air into the main body by the pyrolysis furnace. 4 (b) and 4 (c) are views of FIG. 4 (a) seen from the X direction. 4 (b) shows an embodiment in which the number of magnetic poles forming the magnetic field with respect to the air passage is two, and FIG. 4 (c) shows the number of magnetic poles forming the magnetic field with respect to the air passage. Example. FIG. 5 is a view showing an apparatus 23 for removing harmful substances showing a process in which exhaust gas discharged from a pyrolysis furnace is made harmless and exhausted to the atmosphere.

The pyrolysis furnace (50) is a pyrolysis unit (1) which is blocked from an external space and formed of a firebrick (2), and an air inlet for pyrolysis (4) which is provided in a wall portion of the pyrolysis unit to blow air into the pyrolysis unit as a natural intake unit (4) 5), an inlet air limiting means 17 for restricting the amount of inflow of air into the pyrolysis section by tightening the air inlet, and a magnetic field on the air passage for inducing air from the air inlet to the pyrolysis section. A plurality of pairs of magnets (15) which are formed to self-treat the air for pyrolysis, waste support means (6, 7) for supporting the waste with a grill on the shelf inside the pyrolysis section, and wall portions of the pyrolysis section. Exhaust gas outlet 3 provided, bubbling tanks 35 and 36 which aeration and detoxify the exhaust gas discharged from the exhaust gas outlet in the water tank, dioxins, prolons, and the like contained in the exhaust gas. of And a catalyst system 19 for adsorbing the hardly decomposed substance, and exhaust means for exhausting the exhaust gas into the atmosphere by the fan portion 24.

As shown in Fig. 1 and Fig. 2, the pyrolysis furnace 50 according to the present embodiment includes a pyrolysis section 1, an exhaust gas outlet 3, an upper air inlet 4, a lower air inlet 5, The upper waste support means 6, the lower waste support means 7, the upper heat transfer part 30, the lower heat transfer part 31, the inspection opening 8, the heating opening 18, and the waste inlet 9 are provided. .

First, the thermal decomposition unit 1 will be described. The pyrolysis part 1 is equipped with the fire brick 2 surrounding the side part. This fire brick covers the thermal decomposition part 1 by the columnar shape, and the closed area | region which is substantially blocked from the external space is formed. The sides and the ground of the pyrolysis section can be in contact with the oxidation reaction zone according to the waste input state, so it is necessary to construct fire bricks because it can predict the high temperature above the pyrolysis temperature locally. However, since the upper part of the pyrolysis unit contacts only the reaction gas, it is not necessary to provide a firebrick because it is not exposed to abnormal high temperatures even locally, but it may be provided with a high temperature safety guard for safety reasons depending on the installation site.

The lower part of the refractory brick of the side wall in the longitudinal direction is provided with upper and lower air inlets 4 and 5 for supplying air for pyrolysis and a heating port 18 for heating the heat transfer parts 30 and 31. have. In addition, by providing the top waste support means 6 and the bottom waste support means 7 on the shelf in the pyrolysis unit 1, a triple structure is formed in which the inside of the furnace is divided into an upper end, a middle end, and a lower end.

For example, the heating sphere has a structure and a function similar to that of an automobile oil inlet, and is used only when the heating sphere is heated to the heat transfer units 30 and 31, and has a closed structure otherwise.

In the upper part of the upper waste support means 6 and the lower waste support means 7, for example, an upper heat transfer part 30 and a lower heat transfer part 31 such as represented by charcoal or the like are provided. It is arranged above the upper and lower heat transfer parts 30 and 31 with respect to each waste support means 6 and 7. As the heat medium used as the heat transfer part, charcoal is used since it is easy to operate during initial heating, but other heat mediums such as briquettes, coke, electric heaters, electric heaters and ceramic combinations may also be used. The function of the heat transfer unit is an initial heat supply medium that keeps the waste temperature at the reaction temperature at the beginning of the initial pyrolysis reaction and induces the reaction of the magnetized air with the combustible materials produced during the decomposition process.

The physical and chemical reactions that occur during the combustion of solid combustibles conventional in connection with heat transfers include;

(1) Drying: endothermic reaction due to water vaporization

(2) Carbonization: endothermic reactions due to separation of volatile components and tar components (charcoal burning, coal drying, etc.)

(3) Decomposition: endothermic reaction that absorbs heat of gasification and decomposition with gaseous substance that is the element constituting the relevant frame such as C, H, O, N, etc.

(4) Oxidation: An exothermic reaction in which gaseous substances combine with oxygen to release heat and light

The oxidation process of step (4) is only exothermic, so if the oxygen supply amount of the combustible gas is properly adjusted, only the minimum amount of heat required in the previous step 3 can be supplied. ) Pyrolysis can be continued without raising the internal temperature from the temperature required for pyrolysis, and the oxygen concentration at this time is called the limit oxygen concentration.

Therefore, the method of controlling the reaction rate by adjusting the amount of oxygen (air supply) supplied to the pyrolysis furnace to the maximum oxygen concentration point is adopted, so that the gaseous substance is sufficient to supply the heat necessary for the transfer reaction through the 'heating' process. When it starts to decompose, it is possible to maintain a sufficient heat source with only self-generating gas, so no separate heat supply is required. The heat transfer parts 30 and 31 are auxiliary heat supply means for supplying heat required for initial operation by pyrolysis, not continuous heat supply means, and do not require a separate heat source in a process in which the pyrolysis reaction proceeds normally.

 Waste introduced into the pyrolysis unit through the waste inlet 9 is accumulated in the upper heat transfer unit 30 placed on the upper waste support means 6. If there is only one stage of heat transfer, thermoplastics, etc. of the input waste are heated and then liquefied and flowed down prior to pyrolysis, so that they cannot be completely decomposed because they are not sufficiently supplied with oxygen and heat required for pyrolysis on the bottom of the furnace.

In order to improve this point, when the waste support means and the heat transfer unit are provided in two stages above and below, the flowable plastics or the unreacted substances (uncombusted substances) flowing down from the upper heat transfer unit 30 to the lower heat transfer unit 31 are the lower heat transfer. It can be caught in the portion, and the pyrolysis reaction can be continued. In addition, the upper and lower heat transfer parts 30 and 31 (charcoal, char, etc.) in which the magnetized air supplied from the upper air inlet 4 and the lower air inlet 5 are heated using the heating inlet 18. By heat acting uniformly on the waste on the upper and lower waste support means (6,7) through, it is possible to improve the pyrolysis area of the waste. Therefore, as compared with the case of simply pyrolyzing at the bottom of the furnace as in the related art, it is possible to remarkably improve the pyrolysis efficiency. That is, ultimately, unreacted materials (unburned materials) that do not completely react due to insufficiency do not accumulate at the bottom of the pyrolysis section, and supply magnetized air to terminate the reaction within a short time. When plastics such as thermoplastic elastomers are included in the waste, plastics such as thermoplastic elastomers liquefy or soften as the temperature rises in the thermal decomposition unit 1, and Adhesion and adhesion increase the pyrolysis area, and can significantly contribute to the improvement of pyrolysis efficiency.

The waste inlet 9 is provided at an upper portion of the pyrolysis furnace 50 and includes a first door 10 and a second door 11 that can be opened and closed. The waste is temporarily stored in the space between the first door 10 and the second door 11, and by opening and closing the second door by pulling the second door handle 12, the pyrolysis part 1 It can be put inside.

The newly introduced waste stays on top waste support means (6). When the waste inlet 9 is opened and closed by the double inlet structure, the waste inlet 9 has an explosion-proof structure that is completely isolated from the outside air, thereby ensuring safety when the worker works. Can be.

As shown in Fig. 2, an upper air inlet 4 and a lower air inlet 5 are provided in the lower part of the body of the pyrolysis unit 1. As shown in Fig. 3, each of these air intake openings 4 and 5 is a flow path through which supply gas such as oxygen-containing air flows toward the pyrolysis section 1. The upper air intake port 4 and the lower air intake port 5 are arranged in an equiangular circumferential direction with respect to the pyrolysis furnace, whereby a hole into which a plurality of air flows into each air intake port is formed, It keeps the air supply smooth.

On the other hand, as shown in Fig. 4B, a set of permanent magnets 15a and 15b are provided on the inner surface of each of the air intake openings 4 and 5, respectively. The main body of each magnet 15 has magnetic poles S poles that are the same at both bottom portions, and magnetic poles N poles which are the same with respect to the inside of the air passage are arranged, and a mounting belt made of a nonmagnetic material is bonded thereto. It is fixed by the arrangement | positioning which opposes the inner surface of the pipe | tube of each air intake port 4,5.

On the other hand, as shown in Fig. (C), two sets of permanent magnets 15a, 15b, 15c, and 15d main bodies are provided on the inner surface of each of the air intake openings 4 and 5, respectively. The main body of the magnets 15a, 15b, 15c, and 15d has magnetic poles S poles that are the same in both bottom portions, and magnetic poles N poles that are the same with respect to the inside of the air passage are arranged and made of a nonmagnetic material. The belt 14 is bonded and fixed in an arrangement opposite to the inner surface of the tube of each air intake 4, 5.

The main bodies of the permanent magnets 15a, 15b, 15c, and 15d shown in these Figs. 4 (b) and 4 (c) are directed toward the north pole with respect to the air passages in the respective air inlets 4 and 5, Each electrode is arranged in an opposite shape, and has a structure in which a magnetic field extends to air flowing in the air passage. The magnetic poles, magnetic properties, positions, and the like of the plurality of permanent magnet bodies are not particularly limited, but preferably, the N poles are preferably configured to be positioned with respect to the respective air inlets 4 and 5.

The air passing through each of the air inlets 4 and 5 to which the permanent magnet body is attached is activated under the influence of a magnetic field, and it is considered that some are negatively ionized. However, as a material of the main body of the magnet 15, for example, it is obtained by adopting a ferrite magnet having an excellent cost ratio (cost property), and in addition, various hard magnetic materials such as a permanent ceramic cooperative magnet and a rare earth magnet. It can be suitably employed in consideration of magnetic characteristics, cost ratio (cost characteristics) and the like.

In addition, an exhaust gas discharge port 3 is provided above the pyrolysis unit 1. As shown in FIG. 5, the exhaust gas discharge port 3 is connected to a bubbling tank 35, and a predetermined amount of water is accommodated in the bubbling tank 35. The water in the bubbling tank 35 is maintained at a level higher than the outlet portion 25 of the exhaust gas outlet. Moreover, it is also possible to add other chemicals, such as a slaked lime solution and caustic soda (sodium hydroxide), to the water accommodated in the bubbling tank 35 by neutralization effect of exhaust gas.

As shown in FIG. 5, the discharge pipe 27 is connected to the upper portion of the bubbling tank 35. The discharge pipe outlet 26 is connected to the lower portion of the next bubbling tank 36 to discharge the exhaust gas via the bubbling tank 35. A predetermined amount of water is accommodated in this bubbling tank 36.

However, the water in the bubbling tank 36 is maintained at a higher water level than the outlet pipe outlet 26. In addition, the exhaust gas can be made more harmless by adsorbing the dust and the like contained in the exhaust gas into the water contained in the bubbling tanks 35 and 36 when passing through the bubbling tanks 35 and 36. Gas is also deodorized. As described above, the bubbling tanks 35 and 36 can deodorize and detoxify the exhaust gas, and the number of bubbling tanks can be suitably employed as one or more numbers.

In addition, the upper end of the bubbling tank 36 is provided with a smoke passage 40 forming an inverted U-shape. A fan portion 24 is provided at the end of the smoke passage 40, and combustible gas is discharged into the atmosphere in the state in which the harmful substances are removed from the fan portion 24.

The smoke passage 40 forming the inverted U-shape is formed of the catalyst system 19, the filter unit 20, and the activated carbon unit 22. The combustion exhaust gas passing through the bubbling tanks 35 and 36 is gasified with most of the heavy metal components, and the catalyst system 19, the filter unit 20, and the activated carbon unit 22 are gasified with dioxins, heavy metals, and the like. Adsorbs and removes environmental pollutants.

As the catalyst system 19, a material having a catalyst having an adsorption capacity of undecomposed gas may be used, but it may be formed of a catalyst of a high temperature solid itself. Even if a catalyst whose catalytic activity is deteriorated at 300 ° C. or higher due to catalyst poison can exhibit a sufficiently effective oxidation ability at less than 300 ° C. without a catalyst, an inexpensive catalyst other than a noble metal type may be used. If the noble metal (oxide) particles are dispersed in a washcoat having a large specific surface area even at a high temperature containing rare earths, they become expensive but highly active high-temperature catalysts, resulting in dioxins and Hardly decomposable substances, such as prone, can be adsorbed.

As candidates thereof, aluminum compounds such as aluminum hydroxide, aluminum oxide, aluminum phosphate, silica-based or alumina-silica-based catalysts such as cristbarite, theodolite, sepiolite and tourmaline, all or part of Mg, Ca, Sr, Ba Alkaline earth metals or rare earths such as Y, La, Ce, Pr, precious metals such as Ru, Rh, Pd, Pt, Ag, Au, Ti, Zr, V, Cr, Mo, W, Mn, Fe, Co, Compounds substituted with transition elements such as Ni and Cu and heavy metal elements such as Zn and Sn become catalysts having sufficient activity at high temperatures.

As a material used for the filter of the said filter part 20, it is characterized by any one of a ceramic filter, a particle filling filter, a metal filter, and a fiber filter.

The activated carbon portion 22 can easily inhibit organic chlorine compounds such as dioxins and PCBs, which are highly toxic, and organic chlorine compounds such as chlorobenzene, which are precursors of these toxic compounds. Do. For these deodorizations, carbon-based adsorbents such as activated carbon and coxtan, as well as inorganic adsorbents such as deolite, silica and alumina, can be usefully used.

Next, a specific example will be described for the pyrolysis method.

First, a method of injecting waste into the pyrolysis unit 1 will be described.

The inspection opening 8 is opened and the heat transfer portions 30 and 31 represented by charcoal and the like are placed on the upper and lower waste support means 6 and 7, and the inspection opening is closed.

Then, the waste is placed on the upper heat transfer part 30. As a method, the first door 10 installed in the upper portion of the pyrolysis furnace 50 is opened to put waste into the waste inlet 9, and then the first door is closed. At this time, the second door 12 should be closed. Thereafter, the second door is opened using the second door handle 12 to drop the waste into the pyrolysis furnace so that the waste stays on the upper heat transfer part 30. After all the waste in the waste inlet falls down, the second door is closed.

Next, the heating method will be described.

First, the valve of the inlet air limiting means 17, which is a flow rate limiting mechanism, is opened, and the power of the fan 24 exhaust fan is turned on (switch 'on') to supply air to the pyrolysis part.

Then open the heating sphere 18 and set fire to the charcoal of the upper and lower heat transfer parts 30 and 31 with a gas stove. When the char is heated, the heating port is closed, the temperature in the pyrolysis unit is monitored, and the supply amount of the pyrolysis air flowing into the pyrolysis unit 1 is adjusted by adjusting the valve of the inlet air limiting unit 17, which is a flow rate limiting mechanism. Initiate the pyrolysis of the wastes while controlling.

The waste put in is only incinerated on the heat transfer parts 30 and 31 described above. At that time, heat is uniformly applied to the waste on the upper waste support means 6 and the lower waste support means 7 through the respective heat transfer parts 30 and 31, and the pyrolysis efficiency is good and the pyrolysis area is improved. You can.

Therefore, the thermal decomposition efficiency can be remarkably improved as compared with simply pyrolyzing at the bottom of the furnace as in the prior art. In addition, the waste is pyrolyzed using a small amount of pyrolysis air blown in, and the blown pyrolysis air is activated by magnetization with respect to the air passage 28 of FIG. 4, so that combustion proceeds without extinguishing. .

Furthermore, since the temperature of the exhaust gas is controlled to be maintained at 300 ° C. or lower, since the dioxin precursor contained in the exhaust gas does not pass the resynthesis temperature (300 to 400 ° C.) of the dioxin, generation of dioxins is extremely advantageously suppressed. can do.

The gas produced as a result of the combustion is connected to the bubbling tanks 35 and 36 and aerated in a solution in which water, slaked lime solution or caustic soda (sodium hydroxide) or other chemicals are added in the bubbling tanks 35 and 36. In the process, harmful substances, such as dioxins, tar powder, halogen containing chlorine or fluorine, and wood vinegar, are neutralized.

In addition, the catalyst system 19, the filter unit 20, and the activated carbon unit 22 form an environment such as a heavy metal component or dioxins along the smoke passage 40 forming an inverted U-shape in the upper part of the bubbling tank 36. The load material is completely removed. Thereafter, the gas is exhausted to the atmosphere along the fan section 24.

However, in pyrolysis of wastes, it is known that the content in the exhaust gas of dioxins generated by pyrolysis is affected by the temperature at the time of pyrolysis.

In the above-described pyrolysis method, since the inlet air limiting means 17 of each of the air inlets 4 and 5 is a flow rate adjusting mechanism of combustion air, it is possible to reduce the inflow of air and to adjust the limit oxygen concentration. It is possible to do For this reason, it is possible to pyrolyze the waste without ignition of the waste, and the inlet air limiting means 17 for adjusting the air inflow amount can be adjusted manually or automatically.

In other words, the state of pyrolysis in the pyrolysis furnace can be compared with the traditional Korean furnace. In the traditional Korean brazier that puts ashes on the brazier, puts the charcoal on it, and then covers the ashes and keeps the warmth for a long time, when the charcoal comes in direct contact with the air, the fire of the charcoal becomes strong and the heat is released enough to eat on it. Enter However, if the charcoal is covered with ash, the contact with oxygen is extremely limited, and the burning speed of the charcoal is delayed. Therefore, the warmth is maintained for a long time, but the temperature on the brazier remains only enough to feel the warmth.

Likewise, the pyrolysis furnace maintains the amount of oxygen supplied to the pyrolysis unit at a certain limit so that most of the heat generated by oxidation of the combustibles is consumed for endothermic reactions such as drying, carbonization, and (pyrolysis), which are preliminary steps of the oxidation reaction. do. The temperature inside the pyrolysis unit is not increased by controlling the oxidation rate, which is an exothermic reaction. In addition, since the (thermal) decomposition and oxidation reaction of the waste introduced into the pyrolysis unit 1 is to occur at the lower portion of the pyrolysis unit 1, the bottom of the oxidation zone, the top (thermal) decomposition zone, the next top The carbonization zone and the top part consist of the drying zone. Therefore, the radiant heat emitted from the exothermic reaction zone is suppressed from being radiated in the pyrolysis unit, so that the temperature inside the pyrolysis unit maintains a temperature below the pyrolysis temperature. In other words, in the oxidation zone, the gas, which was higher than the pyrolysis temperature, is decomposed from the pyrolysis zone and is slightly higher than the pyrolysis temperature.Then, the gas is deprived of heat while passing through the carbonization zone and the drying zone. When the temperature is lower than the pyrolysis temperature. This series of reactions is relatively gentle enough to be manually controlled while reading the temperature inside the pyrolysis unit 1, so there is no problem in manual operation, and the temperature in the pyrolysis unit is proportional to the flow rate of the supply air for pyrolysis. Automatic control is possible by the control method.

Furthermore, in each of the air intake openings 4 and 5, the magnetized air is sucked in as the pyrolysis air by the magnetization effect on the air passage 28, and therefore, the pyrolysis section 1 before the pyrolysis. Even after using the present air (oxygen) for pyrolysis, using the slight air sucked by natural intake, for example, the temperature of the pyrolysis furnace 50 at the temperature of 300 ° C. or lower, preferably at an ambient temperature of 120 to 250 ° C., It can continuously pyrolyze at low temperatures. Therefore, it is possible to advantageously suppress the production of dioxins by pyrolysis.

In addition, in such a pyrolysis furnace 50 and a pyrolysis method, it is limited by the inlet air limiting means 17 of each air inlet 4 and 5 and pyrolyzes the waste with inhaled small pyrolysis air. There is also an advantage that the amount of city gas emissions itself can be reduced.

In particular, in the present embodiment, the number of magnetic poles (one pair, two pairs, three pairs, four pairs or five pairs) of two to sixteen of each of the air inlets 4 and 5 is the shape of the air passage. It selects arbitrarily according to the, and is attached in the state which the N poles faced. From this, a magnetic field centered on the magnetic force line is formed in the air passage 28 along the inflow direction of the pyrolysis air, using the repulsion of the magnetic force lines generated by both magnetic poles (N poles). It is possible to exert a magnetic field advantageously.

In addition, since the effect on the magnetic field is unique to the N pole only, the magnetic field is advantageously applied to the inlet air by various factors such as the rotational motion of the electron and the surface tension of the water, as well as the effect on the hydrogen bonding of water. .

In this way, by realizing continuous pyrolysis by applying a magnetic field to the air for pyrolysis, deterioration of the pyrolysis treatment capacity due to prolonged use can be almost completely avoided. Therefore, it is excellent in durability and maintainability.

In this embodiment, since the pyrolysis air easily flows stably in one direction, the magnetized air supplied from the upper air intake port 4 is directly disposed on the upper waste support means 6. Works stably on Therefore, pyrolysis efficiency is good and it is possible to improve a pyrolysis area.

Therefore, it is possible to improve the pyrolysis efficiency as compared with the case of simply pyrolyzing at the bottom of the furnace. In addition, plastics such as thermoplastic elastomers, which are wastes, can be liquefied or softened as the temperature of the pyrolysis unit 1 rises, thereby greatly improving adhesion and adhesion to wastes, etc. It greatly contributes to the improvement of pyrolysis efficiency. The pyrolysis state is further stabilized by these.

In addition, in this embodiment, it is possible to further detoxify the exhaust gas by allowing the dust contained in the exhaust gas to be neutralized with the water contained in the bubbling tank when the exhaust gas passes through the bubbling tank. .

In the present embodiment, for example, as the magnet means, it is also possible to employ an electromagnet in place of the permanent magnet which is the same magnet body 15 as the above embodiment.

The main body of the magnet 15 is provided directly outside the respective air intake pipes 4 and 5 in addition to being installed to the respective air intake ports 4 and 5 by the magnet mounting portion 14 or the like. It is also possible to embed it in the wall part of the air intake opening 4,5. Thereby, for example, it is also possible to arrange the permanent magnet directly on the inner surface of the air passage.

In addition, the position, number, etc. of the permanent magnet as the magnet main body 15 can be adjusted suitably in consideration of the target pyrolysis processing state, cost ratio, etc. For example, in the embodiment of Fig. 4 (b), two magnets are arranged, and in the embodiment of Fig. 4 (c), four magnets are arranged. In addition, the diameters of the respective air inlets 4 and 5 ), It is possible to arbitrarily select the number of magnets from 6 to 16 even numbers, and set it as an opposing position.

In addition, the air intake openings 4 and 5 of the air for pyrolysis are not limited to the structure, excretion position, number, etc. which were described in the said embodiment. For example, in addition to the air intake openings 4 and 5 provided as in the above embodiment, it is also possible to provide other air intake openings and inlet air limiting means at appropriate positions.

It is also possible to mix an exhaust gas purifying agent with the aqueous solution in the bubbling bath, for example, by adding calcined lime to the lime water to improve the neutralization effect and adsorb the generated carbon dioxide to absorb carbon dioxide. It is also possible to reduce the amount of generation.

According to the present invention, in the air passage, it is possible to exert a magnetic field on the air for pyrolysis and to continuously burn the pyrolysis treatment product using the slight air in the pyrolysis section 1, Since nothing passes the resynthesis temperature of dioxins by pyrolysis, it is possible to advantageously suppress the production of dioxins.

Claims (8)

The waste is introduced into the inner space separated by the outer space and the heat insulation wall, and the pyrolysis unit 1 for disassembling and discharging the waste waste into the exhaust gas and the exhaust gas generated from the pyrolysis unit 1 are accommodated therein. A pyrolysis furnace having a bubbling tank for aeration in water, which causes the harmful substances contained in the exhaust gas to be adsorbed to water, and then discharges the exhaust gas. A waste inlet (9) for allowing waste to be introduced into the pyrolysis furnace, Waste support means (6,7) for supporting waste introduced into the waste inlet; Heat supply means for applying heat to the waste; An air supply unit installed at a lower side of a pyrolysis furnace to supply air to the internal space of the pyrolysis unit, And a discharge port (3) for discharging the waste gas generated by pyrolysis of the waste to the bubbling tank. delete The method according to claim 1, The air supply means has air inlets (4, 5) installed through the heat insulating wall of the pyrolysis furnace so that the outside air is introduced into the inside, Magnet 15 for applying a magnetic field to the air flowing through the air inlet, Pyrolysis furnace, characterized in that it comprises an inlet air limiting means for controlling the flow of air flowing through the air inlet (17). The method according to claim 1, The waste support means (6,7) is installed around the air supply means, it is made of grill, The heat supply means is composed of a fuel settled on the waste support means, and a heating port 18 for applying heat to the fuel, The waste inlet 9 has two doors configured to open the first door 10 to temporarily place the waste, close the first door 10 and open the second door 11 to inject waste into the pyrolysis unit. Pyrolysis furnace The method according to claim 3, Wherein the magnet is installed two or more magnets toward the air passage, the pyrolysis furnace characterized in that the N poles are arranged to face each other. The method according to claim 1, The bubbling tank is a pyrolysis furnace, characterized in that the outlet portion of the exhaust gas discharged from the pyrolysis unit (1) is installed under the water surface so that the incoming gas is bubbled up and exhausted to the top. The method according to claim 1, Wherein the bubbling bath contains a solution comprising water, a lime solution, or caustic soda to allow exhaust gases to be aerated in the solution. The method according to claim 1, A catalyst system 19 for adsorbing harmful substances contained in the gas discharged from the bubbling tank, A filter unit 20 and an activated carbon unit 22 for purifying the gas passing through the catalyst system; And a fan unit (24) for discharging the gas into the atmosphere.

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