JP2008086982A - Superheated steam continuously-recycling treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a superheated steam continuously-recycling treatment apparatus for executing the treatment of organic waste such as food waste, sewage sludge and livestock excreta having a high water content for changing the organic waste into feed and an environment restoring material. <P>SOLUTION: Organic waste is charged into the superheated steam continuously-recycling treatment apparatus 1 for heating, from the bottom section of a heating circular tube 26, a slit heat absorption plate 71 and a side face, by introducing a hot gas obtained by a combustion burner 39 and combustion of a distillation gas through a hot gas passage 42 of a shielding plate 50 right below the heating circular tube 26. Heat treatment products of feed and carbide obtained by jetting superheated steam produced in a furnace 3 to the organic waste to accelerate thermal decomposition are cooled in a discharged matter cooling chamber 12, and then discharged out of the furnace. A combustible gas can be produced from the carbide and held in a gas holder 75, and is used in an internal combustion engine to drive a generator to produce electric energy. Heat treatment products with a low utility value as a recycled resource are burnt in a combustion screw unit 44 to use the combustion gas for heating the circular heating tube 26 of the apparatus itself. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for continuously recycling organic wastes such as food residues with high moisture content that are unsanitary and easily altered, livestock manure and sewage sludge with superheated steam.

  A large amount of food residues (for example, leftovers and okara) are generated from canteens and food factories as waste to be recycled. There are various methods and devices for using this organic waste as feed for livestock, but because hydrogen peroxide is added to prevent livestock infection due to feed contaminated with pathogenic bacteria, there is a problem with safety. In addition, it was necessary to treat odor generated during drying.

  Organic waste such as sewage sludge and livestock manure is composted and put into a large amount of cultivated land, but its decomposition rate in the soil is 30% per year and the remaining 70% is carried over to the next year. Therefore, not only does the nitrogen content accumulate and the soil becomes excessively nitrogen, but it also becomes a source of groundwater contamination by nitrate nitrogen and Cryptosporidium protozoa in downstream water areas, and in lakes and other areas, eutrophication causes water quality deterioration due to abnormal occurrence of sea lions It has become a social problem that it is difficult to secure drinking water, and appropriate processing of organic waste has been demanded.

  Efforts have been made to use food residue, sewage treatment sludge and livestock manure into methane fermentation tanks to generate methane gas by methane fermentation bacteria and use it as energy. However, the methane fermentation residue after methane fermentation is entrusted to a processing company and disposed of in landfills. However, it is difficult to secure the landfill site, and there is an urgent need to establish a low-cost treatment method for methane fermentation residue.

  As one of the treatment methods, there is known an internal combustion type sliding carbonization furnace in which these organic waste treatments are inserted into a horizontal cylinder that slides and carbonized by a burner (for example, Patent Document 1). reference.). However, since this internal combustion type carbonization device burns inside the furnace, there is much contact between the treated product and air, and the treated product burns more than necessary, so it does not remain as a valuable material, and a large amount of harmful substances accompanies the combustion. Since it is discharged, the smoke treatment apparatus becomes large and its improvement is required.

  Further, a heat treatment method is known in which a processed material is put into a rotary kiln furnace and heated from the outside (see, for example, Patent Document 2). However, this external combustion type carbonization apparatus heats the organic waste charged in the rotary kiln furnace to 700 ° C. or higher and then keeps a predetermined time and supplies a large amount of water vapor to thermally decompose it. In order to process, a lot of energy was required for the rotary kiln furnace and steam generation, and energy saving measures were required.

  Furthermore, after pre-drying the moisture content to 30% to 50% using a dry kiln, the high moisture content treated product is installed inside a plurality of screw conveyors that move horizontally in the heated cylindrical tube. Is discharged from the lower screw conveyor as carbides (see, for example, Patent Document 3). However, this method transports and installs multiple devices such as a drying device, deodorization furnace, carbonization furnace, and carbide cooling device to the processing site, which increases the cost of the device itself, reducing the equipment cost and running cost. There was a demand for improvement.

  Further, there is known a method in which the inside of the heated cylindrical tube is put into a heated cylindrical tube in which a plurality of screw conveyors are installed in the vertical direction and discharged as carbides from the lower screw conveyor (see, for example, Patent Document 4). .) However, this screw-type carbonization apparatus has a problem in heat loss because it discharges and burns dry distillation gas from the upper part of the jacket part of each screw conveyor, and there is a method of effectively using this dry distillation gas as an energy source. Was needed.

Japanese Patent No. 2870627 JP 2004-34003 A Japanese Patent Laid-Open No. 11-323345 JP 2001-172039 A

  As mentioned above, reduction to nutrient cultivated land by reducing the nutrient accumulation, material circulation function, living organisms by composting organic waste that is generated in large quantities such as food residues, sewage treatment sludge or methane fermentation sludge and livestock manure. Although the excessive burden on the environment has been made permanent due to the poverty of the class, etc., there is an urgent need for a recycling system that can recover this as a resource.

  In order to achieve the above object, the present invention provides a blade shaft 33 of a screw blade 34 disposed at a distance from a hollow main shaft 31 in order to secure a time for the workpiece 21 to contact the wall surface in the heated cylindrical tube 26. A hoisting and transporting screw 29 is installed in which the hoisting blades 35 are horizontally supported on the outer edges of the screw blades 34 that are axially attached and parallel to each other. Superheated steam is injected from between the hollow main shaft 31 and the blade shaft 33. Hot gas is introduced from the hot gas passage 42 of the shielding plate 50, the lower part of the heating cylindrical tube 26 is heated and divided in both directions, passes through the slit heat absorbing plate 71 piped obliquely 45 degrees downward, and then heated cylindrical tube 26 It is raised from between the shielding plates 50 provided on both side surfaces of the plate and efficiently heated.

  In the second problem solving means, in order to absorb the thermal expansion of the heated cylindrical tube 26 due to the heating of the hot gas, the circumscribed ring frame 36 is fixed to the opening hole 4 on the side surface of the furnace body 2 with the bolt 62, and the ring portion 52. A clearance portion 51 is provided on the inner side and the tube end of the heated cylindrical tube 26 is inserted. A ring portion 52 in which a support bearing frame 37 through which the hollow main shaft 31 of the screw blade 34 is passed is fixed to the outside of the circumscribed ring frame 36 with a bolt 62 is inserted into the inside of the tube end of the heating cylindrical tube 26 and heated. The cylindrical tube 26 is freely contractible and maintains airtightness.

  The third problem-solving means is that the carbide in the pyrolysis gasification chamber 7 provided in the upper part of the combustion chamber 11 is a hot gas produced by the combustion of the heated cylindrical tube 26 by the combustion burner 39 and the ejector 41 of the dry distillation gas. By the combined heating in which superheated steam is jetted from between the hollow main shaft 31 and the blade shaft 33, a water-gasification reaction occurs and a combustible gas having a stable property is generated. The combustible gas is cooled by a gas cooler 67, concentrated, and stored in a gas holder 75, which is used as a fuel for an internal combustion engine or a combustion burner 39 for driving a generator.

  The fourth problem solving means is that the discharge cooling chamber 12 provided in the F part of the combustion chamber 11 cools the dried product and carbide that are supplied to the water cooling outer tube 43 and the hollow main shaft 31 of the cooling screw 30 and heat-treated. The hot water discharged from the furnace 3 and cooled in the discharge cooling chamber 12 is generated by the superheated steam generation tube 27 and injected into the processed material 21 in the heating cylindrical tube 26 of the superheated steam drying chamber 8 and the heat treatment chamber 9. The heat treatment is accelerated.

  A fifth problem-solving means is that a combustion screw device 44 provided at the lower portion of the combustion chamber 11 has a combustion air hole 48 perforated on a slope, and water is supplied to the hollow main shaft to promote the combustion of dry matter and carbides. And a cooling screw 30 for conveying the burned husk while cooling it. The combustion shell is dropped into a residue discharge screw 46 orthogonal to the combustion screw device 44 to discharge the combustion residue from the furnace 3, and the hot water that has cooled the cooling screw 30 is heated to superheated steam by the superheated steam generation pipe 27. It is injected into the inside of the cylindrical tube 26.

  The sixth problem solving means is that the combustion conveyor device 54 provided at the lower part of the combustion chamber 11 has combustion air holes 48 drilled on the side surface and floor surface, and water is supplied to the water-cooled fire bed 55 to promote the combustion of dry matter and carbides. A scraper 59 is disposed that heats the heated gas and transports the burned husk while cooling it. A combustion cylinder is dropped into the residue discharge screw 46 orthogonal to the combustion conveyor device 54 to discharge the combustion residue from the furnace 3, and the hot water that has cooled the water-cooled firebed 55 is converted into superheated steam by the superheated steam generation pipe 27, and the heated cylinder Injected into the pipe 26.

  According to the superheated steam continuous recycling apparatus of the present invention described above, the following effects are obtained.

  Superheated steam continuous recycling treatment equipment is a high heat content with a far-infrared radiation function inside a heated cylindrical tube that heats unhydrated food residues with high moisture content and organic matter such as sewage treatment sludge and livestock manure from the outside. Dioxins are used in a low-oxygen reducing atmosphere with superheated steam injected to reduce the temperature at which water boiling evaporates by condensation heat transfer far-infrared radiation with superheated steam, thereby suppressing the oxidation of the processed material and performing thermal decomposition treatment. Because it is carbonized without generating secondary pollution such as odors and odors, it does not choose an installation location, and because it is a small device that does not require ancillary equipment such as smoke treatment equipment and wastewater treatment equipment, the amount of waste generated is It is a superheated steam continuous recycling processing apparatus that can be applied even to an office (for example, 1 ton per day).

  The heat-treated product processed organic waste such as food residue, sewage treatment sludge and livestock manure is a superheated steam continuous recycling treatment device that can control the processing speed, and it is an industrial waste (for example, food residue in a food factory) Etc.) can be used as food materials and livestock feed. In addition, industrial wastes that are difficult to recover as resources (for example, sewage sludge and livestock manure) are treated with carbonized and activated carbon, as well as humic substances (for example, brown natural substances with broken leaves decomposed). It can be applied to mountain forests as humic substances and other wastes to restore degraded forest soil.

  In addition, the fuel of the superheated steam continuous recycling processing equipment is not limited to fossil fuels (heavy oil, gas, etc.), but burns processed products such as dry matter and carbide that are heat treated but difficult to use as resources. Since it can be burned by the combustion screw device 44 and the combustion conveyor device 54 provided on the floor portion of the chamber 11, the energy used in the superheated steam continuous recycling processing device is the heating combustion bar used at startup. Since it is possible to operate only with the initial energy by the burner, the oil consumption of the burner can be greatly reduced. Furthermore, conventional biomass fuels (eg, RDF, RPF, etc.) can also be used in the superheated steam continuous recycling apparatus.

  After producing carbide with low yield of tar, high yield and good ignitability and flammability in the carbonization chamber 10, the carbide is dropped into the pyrolysis gasification chamber 7 without lowering the temperature. Since the pyrolysis gasification process is performed by jetting superheated steam, a combustible gas having stable properties can be obtained. Since this combustible gas can be used as a fuel for an internal combustion engine or the like because of its easy daily start / shutdown operation, the generator is driven using the internal combustion engine as a drive source to generate electric power. Efficiency can also be improved to around 35%.

  Furthermore, since the heating cylindrical tube is heated by the combustion burner in the lower combustion chamber in which 3 to 5 multistages are installed in the vertical direction, the thermal efficiency is improved, and a gasification device for pyrolyzing carbide in the lower portion of the combustion chamber, Since the combustion equipment that burns carbide is installed, the manufacturing cost of the superheated steam continuous recycling processing equipment can be greatly reduced, and it can be operated just by transporting it to the installation place and unloading it, so the overhead is also large. Can be installed at a low price. In addition, it is possible to provide unsupervised continuous operation from the input to discharge of organic waste, and to provide a superheated steam continuous recycling system for a zero-emission biomass processing system that takes into consideration the conservation of the global environment.

BEST MODE FOR CARRYING OUT THE INVENTION

  Embodiments up to the carbonization chamber of the present invention will be described below in detail with reference to FIGS.

  The superheated steam continuous recycling apparatus 1 is inserted into the uppermost opening hole 4 provided on both side surfaces of the furnace body 2 and placed outside the one-side furnace of the superheated steam drying chamber 8 that is horizontally supported, and a heated cylindrical tube 26. A hopper 6 for loading the processed material 21 from above, and a speed reduction motor 38 fixed to a support bearing frame 37 at the end of the pipe, and the lifting and conveying screw 29 is driven. A support bearing frame 37 portion through which a hollow main shaft 31 through which superheated steam is jetted from a hoisting and conveying screw 29 is projected from the furnace body 2 through a rotary rotary valve 32 outside the furnace on the opposite side. This is the structure.

  The heating cylindrical tube 26 of the heat treatment chamber 9 is projected from the furnace body 2 into the opening hole 4 in the second stage, and the support bearing frame 37 portion is laterally supported to form the heat treatment chamber 9. . The heating cylindrical tube 26 of the carbonization chamber 10 is provided in the third stage opening hole 4 with a deceleration drive motor 38 part and a support bearing frame 37 part projecting from the furnace body 2 to be horizontally supported to form the carbonization chamber 10. Further, the forward path and the return path are alternately connected by a discharge pipe cooling chamber 12 and a connecting pipe 40 at the lower part.

  The interior of the combustion chamber 11 becomes a high temperature of about 1200 ° C. by the combustion burner 39 and the secondary combustion by the ejector pipe 41 of the dry distillation gas generated by the thermal decomposition. The high temperature hot gas is introduced from the hot gas passage 42 of the shielding plate 50 disposed immediately above the combustion chamber 11 to heat the lower side of the heating cylindrical tube 26, and is divided and raised in both directions to rise to the heating cylindrical tube 26. The contact residence time is reduced by passing through the hot gas passage 42 of the slit heat absorbing plate 71 attached obliquely downward at 45 degrees and further discharging from the hot gas passage 42 with the shielding plates 50 on both sides of the heating cylindrical tube 26. Secure and efficiently exchange heat.

  The heated cylindrical tubes 26 such as the pyrolysis gasification chamber 7, the carbonization chamber 10, the heat treatment chamber 9, and the superheated steam drying chamber 8 disposed on the combustion chamber 11 are separated by the hot gas passages of the shielding plate 50 and the slit heat absorption plate 71. Since the lower half of the inner wall surface of the heated cylindrical tube 26 directly contacts the hot gas at a high temperature and absorbs heat to promote conduction heating, the processed material in the heated cylindrical tube 26 is efficiently heat-treated. The absorbed hot gas becomes a low-temperature gas of about 150 ° C. on the superheated steam drying chamber 8 and is discharged into the atmosphere from the furnace 3 through the chimney 76, so that the combustion burner 39 and the dry distillation gas ejector are discharged. -Since the hot gas from the tube 41 efficiently heats the heated cylindrical tube 26, energy saving can be achieved.

  The temperature control of the superheated steam supplied from the hollow main shaft 31 is detected by a temperature sensor -72 provided in the superheated steam pipe 65, and the supply of the feed water 18 to the discharge cooling chamber 12 is operated to open and close the electromagnetic valve 73 ( For example, the superheated steam is maintained at around 450 ° C. by closing the valve at 400 ° C. and opening the valve at 500 ° C.). The hot water supplied by the opening / closing operation of the electromagnetic valve 73 and cooled by the water-cooled outer pipe 43 and the cooling screw 30 is heated by the superheated steam generation pipe 27 in the combustion chamber 11 to generate superheated steam from the superheated steam pipe 65 outside the furnace. Provided inside the blade shaft 33 arranged at a distance from the hollow main shaft 31 of the hoisting and transporting screw 29 rotating in the superheated steam drying chamber 8, the heat treatment chamber 9, and the carbonization chamber 10 through the rotary valve 32. It is injected from the superheated steam jet hole 66.

  The high-moisture content treated product 21 introduced into the hopper 6 from the introduction port 5 is treated in an amount corresponding to the superheated steam heat treatment rate while maintaining a state where it is shut off from the outside air by the rotation of the rotary valve 74. 29 parts of the suspended conveying screw heated in the superheated steam drying chamber 8 are dropped into the conveying screw 28 that protrudes from the furnace 3 of the heated cylindrical tube 26 of the superheated steam drying chamber 8 and the outside is not heated. In the heated cylindrical tube 26 heated in the furnace 3, the workpiece 21 is axially attached to the blade shaft 33 arranged at a distance from the hollow main shaft 31, and the screw blades 34 are mutually connected. The hanging blade 35 of the lifting and conveying screw 29, which has been horizontally supported by the hanging blade 35, is dried by superheated steam while maintaining a long contact time with the inner wall of the heated cylindrical tube 26.

  Unsanitary treated products 21 with high moisture content such as food residue, sewage treatment sludge and livestock manure with a moisture content of around 80% are stirred and moved inside the heated cylindrical tube 26 by a hoisting transport screw 29. However, since there is no oxygen due to combined heating in which heating by contact with the wall surface of the heated cylindrical tube 26 and far-infrared heating by superheated steam at about 450 ° C. are added, no oxidation occurs and condensed water adheres to the surface of the processed product 21. Then, it is evaporated while boiling the water of the cell membrane particles without surface hardening, and becomes a treated product having a water content of about 50%, and is stirred and moved to the end of the heated cylindrical tube 26 and disposed at the lower part through the connecting tube 40. Dropped into the heat treatment chamber 9.

  The processed material dropped into the heat treatment chamber 9 is again heated from contact with the inner wall of the heated cylindrical tube 26 and 450 from the superheated steam jet holes 66 inside the blade shaft 33 through the hollow main shaft 31 of the lifting and conveying screw 29. As a result of the combined heating in which far-infrared heating is applied due to the ejection of superheated steam at around 0 ° C., the water in the cell membrane particles of the processed material boils and evaporates, and the processed material is passed through the heat treatment chamber 9 by the lifting and conveying screw 29. Is dried while being stirred and dried continuously while being stirred and moved to a moisture content of about 30%, dropped from the end of the heated cylindrical tube 26 into the lower carbonization chamber 10 via the connecting tube 40 Is done.

  The steam gas containing the odor evaporated from the processed material is collected from the recovery chamber 15 provided in the upper part of each of the superheated steam drying chamber 8 and the heat treatment chamber 9, mixed with the dry distillation gas generated in the carbonization chamber 10, Due to the reduced pressure atmosphere in the combustion chamber 11, it is sucked into the combustion chamber 11 through the ejector pipe 41, discharged from the end of the ejector pipe 41, and ignited by a high temperature atmosphere around 1200 ° C. in the combustion chamber 11 to be secondary. By decomposing, it is thermally decomposed and deodorized. The hot gas generated by the secondary combustion of the combustion burner 39 and the dry distillation gas was introduced from the hot gas passage 42 of the shielding plate 50 disposed immediately above the combustion chamber 11 and installed in multiple stages on the upper part. By heating the heated cylindrical tube 26, the fuel consumption of the combustion burner 39 can be greatly reduced.

  The dried material in the carbonization chamber 10 is a tube in an oxygen-free state while being heated in the reduced-pressure atmosphere by heat treatment with superheated steam at around 450 ° C. by the hoisting and conveying screw 29 inside the carbonization chamber 10 and in contact with the heating cylindrical tube 26. It is stirred and moved to the end, pyrolyzed, carbonized or activated, and dropped into the lower pyrolysis gasification chamber 7 through the connecting pipe 40. In addition, the speed reduction motor 38 which can change the conveyance amount which can be made into a humic thing by controlling the rotation speed of the hoisting conveyance screw 29 in the heating cylindrical tube 26, without making it carbonized or activated carbon in the heating cylindrical tube 26. It is.

  The operation control of the superheated steam continuous recycling apparatus 1 is performed by transferring the processed material from the hopper 6 to the heated steam drying chamber 8 through the rotary valve 74 and to the heat treatment chamber 9. The temperature rises as the temperature drops and drying proceeds. The temperature change is measured and controlled, and the rotary valve 74 is opened. Further, the moisture content of the processed product is changed by controlling the rotational speed of the deceleration drive motor 38 by changing the transport amount of the lifting and conveying screw 29 by inputting the heat treatment condition according to the moisture content of the processed product to be charged. Pyrolysis treatment can be performed in an oxygen-free state with superheated steam optimal for

  FIG. 5 shows the structure of the connecting portion that maintains the airtightness of the heated cylindrical tube 26 by the heating cylindrical tube 26 absorbing the stretch length due to the thermal expansion by heating with the high-temperature hot gas of the present invention. explain.

  In the opening hole 4 for inserting the heated cylindrical tubes 26 provided on both side surfaces of the furnace body 2, the flange portion of the circumscribed ring frame 36 is fixed to the wall surface of the furnace body 2 by bolts 62 and the inside of the furnace 3 through the opening hole 4. The hollow main shaft 31 and the bearing 70 are hermetically sealed on the outer side of the circumscribed ring frame 36 in which the clearance end 51 is provided in the ring portion 52 projecting from the outer end and the end of the heating cylindrical tube 26 is slidably inserted. The flange portion of the support bearing frame 37 that holds the rod portion 53 through the shaft is fixed by a bolt 62, and the ring portion 52 is slidably inserted into the tube end of the heating cylindrical tube 26.

  The ends of the heated cylindrical tube 26 slidably held by a circumscribed ring frame 36 and a support bearing frame 37 provided on both side surfaces of the furnace body 2 are provided between the support bearing frames 37. The slidable clearance portion 51 can absorb the expansion due to the thermal expansion of the heated cylindrical tube 26 due to the heating of the hot gas, so that the hermeticity of the heated cylindrical tube 26 of the superheated steam continuous recycling apparatus 1 is maintained. Thus, interference with the furnace body due to thermal expansion is solved and durability is improved.

  An example of a pyrolysis gasification chamber 7 for generating a combustible gas as a fuel from carbide will be described in detail with reference to FIGS. 3 to 4.

  The carbide introduced into the pyrolysis gasification chamber 7 provided at the lower portion of the combustion chamber 11 was heated by a hot gas of about 800 ° C. by combustion of the combustion burner 39 and combustion of the dry distillation gas by the ejector 41. Heating due to contact with the inner wall of the heating cylindrical tube 26 and superheated steam at around 800 ° C. from the superheated steam jet hole 66 inside the blade shaft 33 through the hollow main shaft 31 of the lifting and conveying screw 29 from the rotary valve 32. Due to the combined heating with the addition of far-infrared heating due to the jetting, the carbide is agitated and moved by the lifting and conveying screw 29 to cause a water gasification reaction, and as a result of the reaction, a water gas containing a combustible gas is generated. Is done. Carbide generates a water gasification reaction inside the pyrolysis gasification chamber 7 with a combustible gas having a stable property, and the water gasification reaction ends at the end of the pipe, and is discharged through the rotary valve 32. 14 is discharged.

  By supplying superheated steam from the recovery chamber 15 above the pyrolysis gasification chamber 7 to the pyrolysis gasification chamber 7, there is no nitrogen gas, and nitrogen is used when used in an internal combustion engine (not shown) or a combustion burner 39. Oxide emissions are reduced. Furthermore, since the combustible gas is concentrated by cooling the combustible gas with the gas cooler 67 provided outside the furnace body 2 via the combustible gas pipe 61, the output of the internal combustion engine can be easily improved. By storing and using this combustible gas in the gas holder 75, it can be used as fuel for an internal combustion engine that can be easily started in a daily start / shutdown operation. Therefore, the internal combustion engine or combustion burner 39 that drives the generator can be used. It can be used as a low pollution gas fuel.

  An embodiment of the exhaust gas cooling chamber 12 in which the carbide provided in the lower portion of the combustion chamber 11 is used as an environmental repair material such as activated carbon and humic substances or fuel charcoal will be described in detail with reference to FIG.

  The dried material and carbides heat-treated inside the heated cylindrical tube 26 by heating the hot gas are shielded from heat by a refractory material of a heat insulating material 69 (for example, castable) through the connecting tube 40. Drop into the cooling screw 30 of the installed discharge cooling chamber 12. The dried product and carbide are cooled in the process of being stirred and moved to the cooling screw 30 while being in contact with the inner wall of the water-cooled outer tube 43. It is discharged from the chamber 12. The structure of the discharge cooling chamber 12 is such that a decelerating drive motor (not shown) of the water cooling outer tube 43 and a support bearing frame 37 portion for supplying cooling water project from the furnace body 2 and are horizontally supported, In this structure, a cooling screw 30 is housed inside the outer tube 43.

  The dried material in the carbonization chamber 10 is a tube in an oxygen-free state while being heated in the reduced-pressure atmosphere by heat treatment with superheated steam at around 450 ° C. by the hoisting and conveying screw 29 inside the carbonization chamber 10 and in contact with the heating cylindrical tube 26. The carbide or activated carbon which is agitated and moved to the end, pyrolyzed, carbonized or activated, and dropped into the discharge cooling chamber 12 below the combustion chamber 11 through the connecting tube 40 is the center in the water-cooled outer tube 43. It is moved to the end of the pipe while being cooled by a cooling screw 30 attached to a water-cooled main shaft 45 installed in the section, and carbide or activated carbon is discharged from the discharge port 14. The hot water around 40 ° C. that has cooled the cooling screw 30 attached to the water-cooled outer pipe 43 and the water-cooled main shaft 45 becomes superheated steam through the superheated steam generation pipe 27 provided on the side surface of the combustion chamber 11 and is superheated from the superheated steam pipe. It is supplied into the steam drying chamber 8, the heat treatment chamber 9 and the carbonization chamber 10.

  Combustion process in which dry matter and carbide, which are difficult to use as resources and valuables, are burned using a combustion screw device 44 provided in the lower part of the combustion chamber 11 as biomass fuel using the superheated steam continuous recycling apparatus 1. The structure of the part will be described in detail with reference to FIG.

  A combustion screw device 44 (in the figure, two sets are arranged in parallel in a W shape) installed in parallel to the heating cylindrical tube 26 at the lower portion of the combustion chamber 11 of the superheated steam continuous recycling apparatus 1 supplies water. A cooling screw 30 attached to a water-cooled main shaft 45 that is rotated by a deceleration drive motor (not shown) is disposed at the bottom position of the V-shaped valley portion of the water-cooled firebed 55 to be cooled and provided on both slopes. A combustion screw device 44 having a combustion air hole 48 for supplying combustion air from the supply air distribution pipe 47 is installed, and dry matter and carbide that are difficult to reuse as resources from the carbonization chamber 10 are connected to the connection pipe. 40 is dropped into the combustion screw device 44 through 40.

  The combustion screw device 44 is supplied with combustion air from the outside of the furnace body 2 through supply air pipes 47 provided on both slopes of the water-cooled firebed 55, and burned matter such as dry matter and carbide from the combustion air hole 48. Always fresh air is injected into the. The ejection position of the combustion air holes 48 is arranged above the center of the water-cooled main shaft 45 to prevent the combustion air holes 48 from clogging due to the accumulation of the combustion air holes 48, and the number of the combustion air holes 48 is the number of combustion screws. The number of combustion air holes 48 is gradually increased from the falling side of the combustion screw device 44 from the falling side of the combustion screw device 44. This is a method in which combustion is gradually performed and maximum combustion is performed in the central portion of the combustion chamber 11, and combustion is terminated and extinguished at the end portion.

  The water-cooled main shaft 45 that is rotated by a deceleration drive motor disposed at the bottom of the V-shaped valley portion is supplied from the outside to the dry matter and carbide to be burned and dropped into the combustion screw device 44. By cooling the cooling screw 30 and the lifting blade 35, damage from the flame due to combustion is prevented. The four lifting blades 35 spanned between the cooling screws 30 attached to the water-cooled main shaft 45 move the combustion products such as carbides while being stirred up and down, thereby reducing combustion while efficiently promoting combustion. It is made into a combustion residue, conveyed to the end of the combustion screw device 44, and dropped into the residue discharge screw 46 at the bottom.

  The combustion residue introduced into the residue discharge screw 46 disposed orthogonally to the combustion screw device 44 immediately below the position of the end of the combustion screw device 44 is discharged from the superheated steam continuous recycling processor 1. The screw 46 is discharged from the discharge port 14 to the outside. Further, in order to enhance the cooling effect, the residue pipe of the residue discharge screw 46 has a double structure (not shown), and the combustion residue is cooled by using a residue discharge screw 46 that can be cooled by supplying water to the water cooling main shaft 45. However, it is possible to discharge from the superheated steam continuous recycling apparatus 1.

  The water supplied from the outside is supplied to the water-cooled firebed 55 and the water-cooled main shaft 45 of the combustion screw device 44, and the cooling screw 30 and the lifting blade 35 attached to the water-cooled main shaft 45 are cooled to warm water of about 40 ° C. Then, by further heating with the superheated steam generation pipe 27 provided on the side surface in the combustion chamber 11, it becomes superheated steam at around 400 ° C., and the superheated steam pipe is connected to the drying chamber 8, the heat treatment chamber 9. By supplying into the inside of the heating cylindrical tube 26 from the superheated steam jet hole 66 provided in the hollow main shaft 31 of the hoisting and transporting screw 29 rotating inside the carbonization chamber 10, and by internal heating of far infrared radiation by the superheated steam and combustion Pyrolysis treatment is efficiently performed by two types of combined heating by external heating of the heated cylindrical tube 26 by the generated hot gas at around 1200 ° C.

  Combustion processing using the combustion conveyor device 54 that uses the superheated steam continuous recycling processing device 1 to provide dry matter and carbide that are difficult to use as resources and valuables as biomass fuel in the lower part of the combustion chamber 11. The structure of the part will be specifically described with reference to FIG.

  In the combustion conveyor device 54 installed in the lower part of the combustion chamber 11 in parallel with the heating cylindrical tube 26, dry matter and carbide which are difficult to be reused as resources from the carbonization chamber 10 are connected via the connection tube 40 to the combustion conveyor device 54. A combustion air hole 48 is provided which is dropped onto the water-cooled firebed 55 which is cooled by supplying water and from which the combustion air is supplied from the outside in two directions: the side surface of the water-cooled firebed 55 and the floor surface. Further, the number of arrangements is gradually increased from the drop side of the connecting pipe 40 of the combustion conveyor device 54, reaches the maximum number at the center of the water-cooled firebed 55, and the number is gradually reduced toward the terminal residue discharge screw 46. The combustion conveyor device This is a combustion method in which combustion is gradually started from the falling side of 54 and becomes a maximum flame at the center of the combustion chamber 11 and the combustion ends and extinguishes at the end.

  An endless chain 57 is passed over drive sprockets 56 provided on both sides of the front and rear of the combustion conveyor device 54, and a scraper 59 is horizontally mounted between the endless chains on both sides to burn dry matter, carbides and the like. Combustion is efficiently promoted by moving the combustion product to be treated while stirring up and down to form a combustion residue, which is conveyed to the end of the combustion conveyor device 54 and falls into the residue discharge screw 46 to be discharged. 14 is discharged to the outside of the superheated steam continuous recycling processor 1. It is also possible to cool and discharge the combustion residue with a residue discharge screw 46 that has a double structure on the outer tube of the residue discharge screw 46 and supplies water to the hollow main shaft for cooling.

  The water supplied from outside cools the water-cooled firebed 55 of the combustion conveyor device 54 to become hot water of about 40 ° C., and is further heated by the superheated steam generation pipe 27 provided on the side surface in the combustion chamber 11 to about 400 ° C. The superheated steam jet hole provided in the hollow main shaft 31 of the hoisting and transporting screw 29 that rotates in the drying chamber 8, the heat treatment chamber 9, and the carbonization chamber 10 through the rotary valve by the superheated steam pipe. Efficiently by two types of combined heating by supplying the inside of the heated cylindrical tube 26 from 66 to the inside of the far infrared radiation by superheated steam and the external heating of the heated cylindrical tube 26 by the hot gas generated at about 1200 ° C. It is pyrolyzed.

  Combustion in the combustion screw device 44 and the combustion conveyor device 54 is not limited to the feed from the connecting pipe 40 of dry matter and carbide that are difficult to use as valuable materials, but is charged from the outside of the furnace body 2 (shown). The fuel such as heavy oil or gas by the combustion burner 39 is directly supplied to the combustion screw device 44 and the combustion conveyor device 54 as solid fuel (for example, RDF, RPF, etc.) It is a structure that can greatly reduce the cost.

  It is a whole structure side sectional view of the superheated steam continuous recycling processing device of the present invention.   It is a longitudinal cross-sectional detail drawing which shows 4th Example of this invention.   It is a whole structure side sectional view showing the 3rd example of the present invention.   It is a longitudinal cross-sectional detail drawing which shows 3rd Example of this invention.   It is a cross-sectional detail drawing which shows 2nd Example of this invention.   It is a longitudinal cross-sectional detail drawing which shows 5th Example of this invention.   It is a longitudinal cross-sectional detail drawing which shows 6th Example of this invention.

Explanation of symbols

7 Pyrolysis gasification chamber 12 Waste cooling chamber 26 Heating cylindrical tube 27 Superheated steam generating tube 36 Outer ring ring frame 44 Combustion screw device 54 Combustion conveyor device

Claims (6)

  In order to secure time for the processed material 21 to contact the wall surface in the heated cylindrical tube 26, the blade shaft 33 of the screw blade 34 arranged at a distance from the hollow main shaft 31 is axially attached, and the outer edge portion of the parallel screw blade 34 is mounted. A hanging conveying screw 29 having a hanging blade 35 mounted horizontally is installed inside. Superheated steam is injected from between the hollow main shaft 31 and the blade shaft 33. The lower part of the heating cylindrical tube 26 is heated by the hot gas introduced from the hot gas passage 42 and is divided in both directions, and then passes through the hot gas passage 42 of the slit heat absorbing plate 71 piped obliquely downward. An apparatus for continuous recycling of superheated steam, which is efficiently heated by being raised from between the shielding plates 50 provided on both side surfaces.   In order to absorb the thermal expansion of the heated cylindrical tube 26 due to the hot gas, the ring portion 52 of the circumscribed ring frame 36 is inserted into the opening hole 4 on the side surface of the furnace body 2 and fixed with the bolt 62. The clearance part 51 is provided and the tube end of the heating cylindrical tube 26 is inserted. On the outside of the circumscribed ring frame 36, the ring portion 52 of the support bearing frame 37 through which the hollow main shaft 31 of the screw blade 34 is passed is inserted into the heating cylindrical tube 26 and fixed with bolts 62, and heated. A superheated steam continuous recycling apparatus characterized in that the cylindrical tube 26 is contractible and maintains airtightness.   The carbide in the pyrolysis gasification chamber 7 provided at the upper part of the combustion chamber 11 is composed of the combustion gas from the combustion burner 39 of the heated cylindrical tube 26 and the ejector 41 and superheated steam injected from the hollow main shaft 31. By combined heating, a water gasification reaction occurs and a combustible gas having a stable property is generated. This combustible gas is concentrated in a gas cooler 67 and stored in a gas holder 75, and is used as fuel for an internal combustion engine, a combustion burner 39 or the like that drives a generator, and is continuously reheated with steam. Processing equipment   The discharged material cooling chamber 12 provided in the lower part of the combustion chamber 11 cools and discharges the dried product and the carbide which are supplied to the water-cooled outer tube 43 and the water-cooled main shaft 45 of the cooling screw 30 and heat-treated from the furnace 3. The hot water cooled in the discharge cooling chamber 12 is converted into superheated steam by a superheated steam generation pipe 27 and sprayed to the treated product 21 in the heating cylindrical tube 26 of the drying chamber 8 and the heat treatment chamber 9 to promote heat treatment. The superheated steam continuous recycling processing apparatus according to claim 1 to 3.   The combustion screw device 44 provided at the lower portion of the combustion chamber 11 is provided with a combustion air hole 48 on a slope, water is supplied to the water cooling main shaft 45 to promote combustion of dry matter and carbide, and cooling that conveys the burned combustion husk while cooling it. A screw 30 is disposed. The combustion shell is dropped into a residue discharge screw 46 orthogonal to the combustion screw device 44 to discharge the combustion residue from the furnace 3, and the hot water that has cooled the cooling screw 30 is heated to superheated steam by the superheated steam generation pipe 27. The superheated steam continuous recycling apparatus according to claim 1, wherein the superheated steam is injected into the cylindrical pipe 26.   The combustion conveyor device 54 provided at the lower portion of the combustion chamber 11 has combustion air holes 48 drilled in the side surface and the floor surface, water is supplied to the water-cooled fire bed 55 to promote the combustion of dry matter and carbides, and the burned husk is cooled. A scraper 59 to be transported is disposed. A combustion cylinder is dropped into the residue discharge screw 46 orthogonal to the combustion conveyor device 54 to discharge the combustion residue from the furnace 3, and the hot water that has cooled the water-cooled firebed 55 is converted into superheated steam by the superheated steam generation pipe 27, and the heated cylinder The superheated steam continuous recycling apparatus according to claim 1, wherein the steam is injected into the pipe.

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