JP4421815B2 - Kiln apparatus and method for producing fired product of tanned silver candy - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention creates a kiln for firing pottery, earthenware, tiles, etc., has a mixed gas generation kiln outside the firing kiln, is connected to the firing kiln, is filled with the base of the pottery and heated, and the fired product is If the temperature reaches an appropriate temperature, heat the dry distillation kiln of the heating kiln, and if the baking kiln is ready for hatching, immediately put a gas material mixed with salt, boric acid and pine resin into the dry distillation kiln, close the throat, and close the water tank Water is dropped into the carbonization furnace in the form of water droplets, and heating is continued to generate steam gas, and four types of mixed gas, hydrocarbon gas, salt gas, boric acid gas, and steam gas, are generated. The fired product of tanned silver-colored soot is brought into contact with silica on the surface of the substrate, and the salt gas mixed with hydrocarbon gas undergoes a hatching reaction and hatches to form a glassy glazed silver-colored soot film. About.
[0002]
[Prior art]
A conventional method for obtaining a tanned silver candy is Japanese Patent Application No. 53-117154 filed by Minoru Sakamoto (same as the applicant of the present application). A forming method is described in which a hatching material such as coal is introduced into a kiln simultaneously with salt to generate salt gas and hatching gas to form a glazed silver shell.
The sushi kiln used at the time described above is a daruma kiln and an overturned kiln with a chimney. The Daruma kiln attaches a rooster to the floor of the combustion chamber, burns firewood and coal as fuel, and throws in the next fuel as soon as possible while burning firewood and coal fuel without burning and burning, A firebed on the top surface is built to a thickness of about 15cm, and when the substrate reaches the proper temperature, the airway is closed, the kiln window (smoke outlet) is made smaller, and firewood and coal are fired from the mouth. Put it on the floor, and when it is done, seal the entrance and the airway, blow down the window according to the amount of smoke, and throw the firewood and coal Carbonized to generate hydrocarbon gas and contact the substrate to form a carbon coating. When it is finished, it is a clay kiln manufactured by sashimi, which closes the hole in the window and seals it with kneaded clay so that air does not enter the kiln. Further, the above-described inverted kiln is a kiln in which a chimney is attached and the substrate is fired with the chimney of an overturn, and the smoke is discharged to the atmosphere through the chimney and fired. Hatching was carried out with the use of hatching gas, and the flue gas was hatched by making a blow hole at the base of the chimney, adjusting the blowing, and flowing it into the chimney to discharge it into the atmosphere. Both the above-mentioned Daruma kiln and fallen kiln are kilns with a wide combustion chamber and a roasting kiln that can create a thick firebed. This is a method in which salt is added to the daruma kiln and the inverted kiln at the same time as pouring and coal are added to form a silvery cocoon.
[0003]
In addition, Japanese Patent Application No. 51-117154 has recently used gas hatching furnaces and oil hatching tile tile kilns, and when making silver tile tiles in gas and oil kilns, separate salt. It may be heated with a simple heating device to form a salt gas, and flow in the same manner as the gas from the pipe. It is written. With this gas or oil kiln, the gas kiln burns propane gas with a gas burner, and hatching is performed by attaching 20 to 30 gas ejection nozzles on the ceiling of the kiln and ejecting propane gas from the nozzles. It is a kiln that performs. Oil kilns burn oil with an oil burner, and hatching attaches a rubber hose from the oil tank, attaches an iron pipe to the tip of the hose, and inserts the tip of the pipe into the kiln bottom. It is a kiln that generates and generates hatching. A method is described in which a heating device is separately provided in the above-described hatching furnace, and salt is heated to form a salt gas, which is poured from a pipe to obtain a silver-colored soot. The above is a conventional method for forming a tanned silver cocoon.
[0004]
[Problems to be Solved by the Invention]
The conventional kiln for burning fired silver-colored potatoes disclosed in Japanese Patent Application No. 53-117154 is not a dedicated kiln for burning only fired silver-glazed fired products, but fired tiles are fired in a kiln furnace. This kiln is a kiln with a wide combustion chamber floor and a kiln that burns firewood and coal as fuel. In this kiln, in order to obtain a fired product of a glazed silver candy film, it is indispensable to smash firewood and coal into the remaining fuel so that it does not ash and the next fuel is added to create a firebed for every fire. It is a condition. In a kiln that does not have a firebed, the temperature of the combustion chamber floor is rapidly cooled by the heat of vaporization of salt, soot, and coal even when the hatching material is added. If a large amount of high-temperature mixed gas is not generated, even if the mixed gas contacts the substrate surface in the low-temperature mixed gas, neither hatching nor hatching reaction occurs.
[0005]
Furthermore, the above-mentioned kiln removes the lid of the spout into the high-temperature kiln that has been burned, and mixes salt, soot, and coal on the firebed with good mixing, so that it is not possible to generate a mixture gas without concentration. It was possible.
[0006]
When salt, soot, and coal are once injected into the upper surface of the combustion chamber fire bed, even if the temperature of the combustion chamber reaches 1100 ° C. or higher, the temperature drops to about 500 ° C. to 450 ° C. For this reason, a large amount of hatching material was not introduced into one well at a time, but the amount to be charged into one well was divided into 3 minutes so that the combustion chamber was not rapidly cooled. Even when such an operation was performed, the temperature was rapidly cooled by the heat of vaporization of the input.
[0007]
Furthermore, this kiln burns soot and coal during combustion, and disperses a large amount of smoke and ash into the atmosphere. In addition, during hatching, the wind passage is closed, the smoke vent is made smaller, soot and coal are put on the firebed every other than the mouth, and it is dry-distilled by the heat of the firebed and exhausts the smoke and smoke into the atmosphere. It was. After that, pollution problems became severe, and emission of toxic gases was prohibited by the regulations of the Air Pollution Law, making it impossible to use kilns baked by the above method.
[0008]
Furthermore, a method of creating a large amount of firebed on the rooster in the combustion chamber and adding salt, firewood, and coal to generate a mixed gas was introduced into the combustion chamber during cooling after kiln stoppage. It took time to lower the temperature of the kiln due to the heat storage of firewood and coal carbide. Comparing the cooling time with a kiln without a firebed, the kiln without a firebed cools the kiln quickly for 5 to 6 hours even at the same firing temperature.
[0009]
In addition, when the temperature in the kiln after cooling reaches 300 ° C., the kiln is opened. However, each kiln with a firebed is prepared with 3 or 4 cups of water in the culvert and when the groin is opened. Quickly sprinkle firewood water on charcoal to prevent ignition and scavenge charcoal. It is hard work to sprinkle a large amount of charcoal when hot water vapor spouts from the mouth if water is put on the high temperature charcoal at 300 ° C.
[0010]
Furthermore, from around 1975, iron-plate kilns burned with a burner using gas or petroleum liquefied fuel and then burned with gas or petroleum have been used. At the time of combustion, no smoke or smoke is produced, the air is not polluted, and no pollution problems occur. However, it is impossible to obtain a burned silver-colored fired product. This kiln is a firing kiln containing 1000 pieces of tiles, and has 14 to 16 sheds at the front and back, and the diameter of the shed is small at around 12 cm, and salt, firewood, and coal cannot be input. Moreover, even if it is thrown in, it cannot be thrown uniformly into the floor of the combustion chamber. Even if coal or salt is put into the floor of the combustion chamber without a fire bed, the combustion chamber floor is rapidly cooled by the heat of vaporization, and it is impossible to generate a good mixed gas at a high temperature.
[0011]
Further, it is needless to say that the hatching of the fired product of the glazed silver bran is that the substrate is uniformly burned and the hatching temperature is appropriate. Even if the substrate is sufficiently baked, salt, soot, coal, etc. are put into the combustion chamber, the state of the input of the input is bad, one corner has a lot of salt input, and one side has a lot of soot and coal When charged, soot and coal hydrocarbon gas first comes into contact with the substrate to form a carbon coating. Even if the salt gas tries to contact after forming the carbon coating, it is covered with the carbon coating and cannot contact the silica on the surface of the substrate, and only the hydrocarbon gas forms the carbon coating. This attached carbon coating will be bald when touched by hand when leaving the kiln. The bald base becomes a black defect. Further, if the salt gas comes into contact first, it is hatched to become glassy, but hydrocarbon gas molecules cannot penetrate into the glassy soot, and it is not possible to obtain tanned silver soot. As described above, the method of adding salt, soot, and coal into the combustion chamber of a conventional kiln has a difference in density in the input, it is difficult to generate a well-mixed gas, and the first-class product is 30% or less Met.
[0012]
Furthermore, the traditional fired baked goods have a history of more than 1300 years, but even if you look at the roof tiles of Horyu-ji Temple in Yamato or the roof tiles of temples built in the Edo period, the color changes. And there is no roof tile that keeps the beautiful tanned silver color when it leaves the kiln. Even a tile baked by a master using high-quality clay, after 50 years, it has been exposed to wind and rain and turned gray-black in color, losing the beautiful tanned silvery luster when leaving the kiln. In addition, the tile roof tiles near the coast turn black-brown due to salt when hit by the sea breeze. Sea water splashes with the wind, penetrates into the roof tile, comes into contact with iron in the roof tile, oxidizes by the salt, and discolors the surface. Moreover, if it is used for figurines and household goods, the tanned film will fade and become black for a long time. Furthermore, the conventional baked fired product has a high water absorption rate because it is free of wrinkles. In addition, those used outdoors such as roof tiles, clay pipes, and flower pots are frost-damaged in cold regions and have a high damage rate.
[0013]
Next, I will describe the conventional salt-baked kiln. Until around 1975, the pollution problem was not as severe as it is today, and in the Akashi area of Hyogo Prefecture, more than 50 large-scale salt fired tiles and clay pipes were fired. During hatching, harmful salt gases were released into the atmosphere. Since then, pollution problems have become severe, regardless of public or private sector, and there are now no salt-bakers.
[0014]
[Means for solving problems]
In order to achieve the above object, the present invention creates a firing kiln and a gas generating dry distillation kiln separately, connects the firing kiln and the dry distillation kiln with a gas trunk pipe, performs firing and hatching in the firing kiln, mixing The gas was generated in a dry distillation kiln, sent to a firing kiln that had been burned through a gas trunk, and hatched.
[0015]
In addition, using a fluid fuel of oil and gas that does not disperse a large amount of smoke into the atmosphere, create a firing kiln that burns with a burner, and also a heating kiln that burns and heats with a burner to generate mixed gas It was possible.
[0016]
In addition, a box-shaped kiln is made of metal plates, a gas trunk pipe is installed in the center of the flue at the bottom of the kiln, a gas branch pipe is placed between the banks, and connected to the gas trunk pipe. The mixed gas can be ejected from the gas ejection hole, and an exhaust gas hole is provided in the ceiling of the firing kiln so that exhausted exhaust gas can escape, and the mixed gas flows from the bottom of the firing kiln to the gas ejection hole. It erupts all at once, rises directly above and contacts the surface of the substrate and hatches. After hatching, it rises further and enters the exhaust hole. A kiln was formed in which the mixed gas rose from the kiln bottom and hatched.
[0017]
In addition, an exhaust gas chamber is provided above the exhaust gas hole, an exhaust gas incineration chamber is installed above the exhaust gas chamber, connected by an exhaust gas vent pipe with a vent on / off valve, a flare is attached to the exhaust gas incineration chamber, and a burner can be attached for combustion In addition, a three-dimensional purification tank is provided after the exhaust gas incineration chamber, and connected to the exhaust gas incineration chamber so as to allow ventilation, and a spray nozzle is attached to the upper portion of the purification tank. In addition, a solution tank is provided directly under the purification tank. Sodium hydroxide is dissolved in 10 times water and placed in the solution tank, and the solution is sent to the spray nozzle with a power pump to enable spraying. Then, an opening / closing valve is attached to the bottom of the purification tank so that the solution in the purification tank is dropped to the solution tank. At the same time the hatching of the firing furnace begins, the burner in the incineration chamber is ignited, the power pump is started, the vent pipe on / off valve is opened, the combustion gas and mixed exhaust gas enter the exhaust gas hole, and the exhaust gas chamber The hydrocarbon gas in the mixed exhaust gas is burned and removed by the burner through the exhaust gas vent pipe and entering the exhaust gas incineration chamber. Further, the mixed exhaust gas enters the purification tank, enters the concentrated mist of the sodium hydroxide solution ejected from the spray nozzle, contacts the salt gas in the mixed exhaust gas, and is reduced to salt by a reduction reaction to form salt water particles. A method of exhaust gas treatment for a tanned silver-colored fired kiln that falls to the bottom of the purification tank and further accumulates in the solution tank and continues to circulate to purify the salt gas, and only harmless gas enters the chimney and is discharged to the atmosphere.
[0018]
In addition to the firing kiln, on the other side of the chimney of the firing kiln, a dry distillation kiln that generates mixed gas is made of heat-resistant metal, and one side is provided with an inlet for introducing mixed gas material, and the other side is the gas trunk of the firing kiln. In order to allow the mixed gas to be ventilated and to heat the dry distillation kiln, the periphery of the dry distillation kiln is wrapped with a metal plate, the inside is attached with a heat insulating material, and a throat is attached to the lower part. A burner is attached to the shed, a zigzag chimney is built on the ceiling of the kiln, a cylindrical steam generation pipe made of heat-resistant metal is attached downward from the ceiling at the first bend, and fibers are placed in the cylinder. Stuffed metal fibers. Further, a water tank is provided at the upper part of the water vapor generating pipe, the water vapor generating pipe and the water tank are connected by a pipe, a water regulating valve is provided in the middle, and water can be dropped onto the upper part of the metal fiber in the water vapor generating pipe.
[0019]
First, the substrate is filled in the firing kiln and starts burning. When the temperature of the substrate approaches 1150 ° C., the heating burner of the heating kiln is ignited, and combustion is continued while heating the dry distillation kiln and the steam generating tube. Furthermore, if the temperature of the firing furnace reaches an appropriate temperature, the combustion of the burner is reduced to prepare for hatching. When the preparation is completed, the firing of the firing furnace is stopped, and a mixed gas of salt, pine resin and boric acid in the dry distillation furnace Add material, close the lid and continue burning. The mixed gas material is subjected to dry distillation cracking by heating to become a salt gas, a hydrocarbon gas, and a boric acid gas, and an amount of gas corresponding to the mixed ratio is generated. Further, the water regulating valve is opened, and the water in the water tank continues to drop onto the metal fibers in the steam generation pipe, and the water drops are thermally decomposed by the high-temperature metal fibers to enter the dry distillation kiln as steam gas. A small amount of water vapor gas is added to the three types of mixed gas generated earlier, and the water vapor gas is added to promote the adhesion of the mixed gas to the substrate surface. A mixed gas kiln apparatus characterized by the generation of a mixed gas that mixes four types of gas in a dry distillation kiln to form a mixed gas, which is sent to the firing kiln and contacts the substrate to form a tanned silver-colored soot.
[0020]
In order to obtain a better tanned silver cocoon, the material used for gasification by putting it in a dry distillation kiln is selected as a salt that hatches in contact with the silica on the surface of the substrate. Select rosin as the hydrocarbon gas generating material that mixes and turns into a silver-colored soot, and then adds boric acid to improve gloss. The pine resin is crushed and mixed in a granular form. As for the mixing rate, 57% salt, 40% pine resin, and 3% boric acid are good. Moreover, after mixing and putting into a kiln and heating and melt | dissolving in a viscous form, it is suitable for the time of conveyance and injection | throwing-in if it takes out after pouring into a box shape and taking out as a solid block. In the case of a tile kiln, the amount put into the dry distillation kiln may be 15-18 kg in a 1000-sheet kiln.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described based on examples with reference to the drawings.
The outer shape of the firing kiln 1 is made in a box shape with a metal plate, a heat insulating brick is attached to the inside of the metal plate kiln to make a kiln wall 2, a heat insulating brick is attached to the bottom of the kiln, and a kiln floor 3 is made. Wool-like heat-insulating refractories are attached to the upper and lower doors made of metal plates, and the door 4 is assembled. Further, a kiln ceiling 5 is constructed by attaching a wool-like refractory to the ceiling of the metal plate. A plurality of sheds 6 are provided at the lower portions of both sides, and burners 7 are installed in the sheds 6 respectively so that combustion is possible. Furthermore, the chimney 10 is constructed in the center of the kiln floor 3, one side from the kiln wall 2 to the foundation of the chimney 11 outside the kiln, and the chimney 11 is built on the foundation. At the upper part of the chimney foundation, a flue port 12 is provided to prepare a sealable flue lid 13. When the firing kiln 1 is finished, it is placed over the flue 12. A door 14 for adjusting the flue gas at the flue port 12 and performing the opening and closing operation is provided at the lower part of the chimney 11 so that the flue gas can be adjusted. Further, a refractory brick of the shore 16 that supports the firing chamber floor 15 is prepared, and the firing chamber floor 15 is constructed by placing a girder brick between the shore and the shore. A through hole 22 through which the soot and mixed gas pass from below the floor is provided on the floor surface. Below the girder brick is an underfloor tunnel 17 and above the floor is a firing chamber 21. Further, a gas trunk pipe 18 through which the mixed gas passes through the center of the flue 10 is passed, and a part of the gas trunk pipe 18 is attached to the outside of the kiln wall 2 opposite to the chimney 11. A mixed gas branch pipe 19 provided with a gas outlet 20 is installed in the middle between the shore 16 and the shore 16 and is connected to the gas trunk pipe 18 so that the gas can be vented. It enters into the pipe | tube 19 and it enables it to eject from the gas ejection port 20. FIG.
[0022]
Further, on the boundary between the combustion chamber 24 and the firing chamber 21, a fixed fire door wind 23 is piled up with bricks, and fire door wind through holes 22 are provided and fixed in places. Furthermore, a removable brick is prepared at the boundary between the firing chamber 21 and the combustion chamber 24 on the entrance / exit side of the kiln, which is removed when leaving the kiln and stacked when the kiln is packed. They are stacked up to the same height as that, and a through hole 22 is provided.
Install a fire door to prevent strong firewood from hitting the substrate during firing. Further, a suction port 26 is provided immediately above the flue 10 in the center of the firing chamber floor 15 so that the fired soot enters the flame suction port 26 and reaches the flue 10. Further, an exhaust gas hole 27 through which exhaust gas during hatching passes is provided in the center of the ceiling of the firing chamber 21, and a rectangular exhaust gas chamber 28 is attached to the upper part of the exhaust gas hole 27. Further, an exhaust gas vent pipe 29 having a vent pipe opening / closing valve 30 attached to the exhaust gas chamber, which is closed during firing and opened and exhausted during hatching, is attached.
[0023]
Further, an exhaust gas incineration chamber 31 is installed in the upper part of the exhaust gas chamber 28 and connected with an exhaust gas ventilation pipe 29 so as to allow ventilation, and a combustion chamber burner 33 is attached to the outlet having the exhaust gas outlet 32 to allow combustion. Further, a purification tank 35 is installed vertically on the side of the firing kiln 1, a spray nozzle 36 is installed in the upper part of the tank, a solution tank 39 is installed on the lower surface outside the purification tank 35, and sodium hydroxide is increased 10 times. Put a solution in water. Further, a power pump 38 for sucking up the solution is attached, and the solution in the solution tank 39 is connected by a pipe 37 so that the solution can be ejected by the spray nozzle 36. Furthermore, if the opening / closing valve 40 is attached to the bottom lower surface of the purification tank 35 and the valve is opened, the solution accumulated in the purification tank 35 can be dropped into the solution tank. Further, a circulation vent pipe 41 is connected to the flue 10 from the lower part of the purification tank 35, and a circulation opening / closing valve 42 is provided in the middle, which is opened when the firing kiln 1 is cooled to allow ventilation. Further, a purified gas exhaust pipe 43 with an exhaust gas opening / closing valve 44 is connected from the upper part of the chimney 11 of the chimney 11 to the lower part of the purification tank 35 so as to allow ventilation.
[0024]
Next, the heating kiln 58 will be described. On the opposite side of the chimney 11 of the firing kiln 1, a dry distillation kiln 45 made of heat-resistant steel is made in a rectangular box shape, and a gas material inlet 47 is provided on one side surface. A kiln lid 48 is attached so that it can be opened and closed. Further, the opposite side of the inlet 47 of the dry distillation furnace 45 is connected to the gas trunk pipe 18 protruding from the outer wall of the firing furnace 1. Furthermore, the periphery of the dry distillation kiln 45 is covered with a metal plate, and a heat-insulating refractory is attached to the inside to make a heating chamber 46. A heating chamber port 49 is provided at the lower part of the heating chamber 46, and a heating burner 50 is attached to the port to make it combustible. A zigzag gas kiln chimney 51 is built above the ceiling of the heating chamber 46, a water tank 52 is mounted on the heating chamber 46, a water adjustment valve 53 is attached downward to the bottom of the water tank, and the water adjustment valve A U-shaped water reservoir 59 is attached with a transparent pipe under 53 so that the dropped water can be collected in the U-shaped portion so that the drop of water can be seen. Even if the water adjustment valve 53 is forgotten to be closed, it is closed by the accumulated water. Further, a steam generation pipe 55 is vertically installed in the chimney from the horizontal portion of the zigzag gas furnace chimney 51, and the metal fibers 56 are packed in the steam generation pipe 55. Further, the upper part of the steam generation pipe 55 and the water reservoir 59 are connected by a water pipe 54 so that the water in the water tank 52 can fall into the steam generation pipe 55. Next, the steam generation pipe 55 and the dry distillation furnace 45 are connected by a steam pipe 57. The above is the mixed gas generator.
[0025]
Further, the operation of the main body apparatus will be described. The base material is packed in the firing kiln 1 and removed when the packing is finished, and the fire door wind 25 is piled up to be equal to the height of the fixed fire door wind 23. Further, the inlet / outlet door 4 is closed, then the vent pipe opening / closing valve 30 at the upper part of the exhaust gas chamber 28 is closed, the flue lid 13 at the lower part of the chimney 11 is removed, the adjustment door 14 is closed, and the circulation opening / closing valve 42 and the exhaust gas opening / closing are further closed. The valve 44 is closed. Next, the kiln lid 48 of the dry distillation kiln 45 is closed to prepare for ignition. Further, the burner 7 at both sides of the firing kiln 1 is ignited and started to burn. The soot rises from the combustion chamber 24 and reaches the ceiling, gradually enters the center of the firing chamber 21, passes through the base, enters the suction port 26, passes through the flue 10 and enters the chimney 11, and enters the chimney. Escape and continue to burn. When the upper substrate is baked, the soot gradually enters the lower part and enters the suction port 26. When the lower part is baked, it also passes through the through hole 22 from the underfloor tunnel 17, passes through the underlying material, enters the suction port 26, enters the chimney 11 through the flue 10 and continues to be baked. When the substrate further approaches a temperature of 1150 ° C., the heating burner 50 of the heating kiln 58 is ignited, and the dry distillation kiln 45 and the steam generating pipe 55 are started to air.
[0026]
When the temperature of the firing kiln 1 reaches an appropriate temperature of about 1150 ° C., the fire of the burner 7 of the firing kiln 1 is reduced, the adjustment door 14 is opened, and the flue lid 13 is put on the flue mouth 12 to place the flue 10 is further opened, the vent pipe on / off valve 30 of the exhaust gas vent pipe 29 is opened, then the exhaust gas on / off valve 44 is opened, and the solution on / off valve 40 of the solution tank 39 is opened to prepare for hatching.
[0027]
When preparation for hatching of the firing kiln 1 is complete, the combustion of the burner 7 is stopped, the lid is closed with the lid 8 and fastened with the clasp 9, and the kiln 48 of the dry distillation furnace 45 is opened and mixed. The gas material is quickly put into the dry distillation furnace 45, the furnace lid 48 is closed, the heating burner 50 is ignited to raise the temperature, the mixed gas is continuously generated, the water adjustment valve 53 of the water tank 52 is opened, and the water reservoir 59 is opened. The adjustment is made while observing the amount of water droplets falling to the inside of the steam generation pipe 55, so that the water droplets start dropping in the form of drops. The dropped water comes into contact with the metal fibers 56 in the steam generation pipe 55 and vaporizes to become steam gas, and enters the dry distillation furnace 45 through the steam pipe 57. As the dry distillation kiln continues to heat, the mixed gas material is pyrolyzed, salt, pine resin, and boric acid become mixed gas, and further, water vapor gas is added, and four types of gas are generated in one kiln at the same time and mixed unavoidably. The mixture gas is generated as a gas mixture without concentration, and flows into the gas main pipe 18 to keep heating, the vent pipe opening / closing valve 30 is opened, the incinerator burner 33 is ignited, combustion is started, and the power is continued. The pump 38 is turned on to start the operation, and the sodium hydroxide solution in the solution tank 39 is sucked up and sent to the spray nozzle 36 to be blown out so that the inside of the purification tank 35 is made into a thick mist.
[0028]
Further, the mixed gas generated from the dry distillation furnace 45 passes through the gas trunk pipe 18, enters the gas branch pipe 19 piped on the entire bottom surface of the firing chamber floor 15, and is simultaneously formed by the gas outlet 20 provided in the branch pipe. It blows out and passes through the through hole 22 on the entire floor of the baking chamber floor 15 to fill the bottom of the baking chamber 21. The mixed gas fed in one after another has a lower temperature and a higher specific gravity than the combustion gas. The mixed gas having a high specific gravity rises straightly and enters the mixed exhaust gas hole 27, is further collected in the exhaust gas chamber 28, passes through the exhaust gas vent pipe 29, and enters the gas incineration chamber 31.
[0029]
The fired high temperature substrate is gradually replaced with the mixed gas as the combustion gas is expelled, adheres to the surface of the substrate, and the silica and salt gas on the surface cause a hatching reaction due to the high temperature, and the hydrocarbon gas is mixed. Hatching as it is. The steam gas mixed in the mixed gas improves the adhesion of the mixed gas to the substrate, and the boric acid gas is blown for 50 to 60 minutes while helping to hatch and improve gloss.
[0030]
The mixed gas continuing to blow is entered into the exhaust gas incinerator 31 and incinerated by the incinerator burner 33, and the hydrocarbon gas in the mixed gas is burned and removed. Non-burning boric acid gas and salt gas enter the purification tank 35, descend in the spray of the sodium hydroxide solution, come into contact with the salt gas, and are reduced to salt by a reduction reaction to form salt water particles. The liquid drops to the bottom of 35 and accumulates in the solution tank 39 through the on-off valve 40. It is sucked up again by the power pump 38 and repeatedly circulated for purification. The exhaust gas from which the salt gas has been removed in the purification tank 35 becomes an exhaust gas containing only boric acid gas having no harmful substances, enters the purification gas exhaust pipe 43, and further enters the chimney 11 and is discharged to the atmosphere. Generation of gas from the dry distillation furnace 45 is dry distillation in 50 to 60 minutes, and gas generation ends.
[0031]
When the dry distillation is approaching the end, the mixed exhaust gas from the blower loses momentum, and the color of the exhaust gas, which is black, becomes nearly transparent. At that time, the kiln stop work is started. In the operation of stopping the kiln, the combustion of the heating burner 50 of the heating kiln 58 is stopped, and then the water adjustment valve 53 is closed to stop the flow of water. Further, the exhaust gas vent pipe opening / closing valve 30 is closed, and then the combustion of the incinerator burner 33 is stopped, and the exhaust gas outlet 32 is covered and sealed with the outlet lid 34. Further, the power pump 38 is turned off, the open / close valve 40 below the purification tank 35 is closed, the exhaust gas open / close valve 44 is further closed, and the kiln stop is completed. If one hour has passed after the kiln stop, the next is the cooling stage. First, do not open the vent pipe opening / closing valve 30 and the circulation opening / closing valve 42 at a time, open them little by little in three portions every 20 minutes, fully open the third time, and leave it until the kiln is opened for cooling. Do.
[0032]
By performing the above operation, the high temperature gas in the kiln starts to rise, passes through the exhaust gas hole 27 and enters the exhaust gas chamber 28, further passes through the exhaust gas vent pipe 29 and enters the exhaust gas incineration chamber 31, where it is cooled and cooled. The gas enters the upper part of the purification tank 35. The gas that has been cooled and has increased in specific gravity descends in the tank, reaches the flue 10 through the circulation vent pipe 41, and flows sideways through the flue 10 in the firing kiln 1. When the gas with a high specific gravity descends one after another, the gas in the flue 10 passes through the suction port 26 directly above the flue 10 and flows into the bottom of the firing kiln 1, and the gas with a high specific gravity flows from the bottom of the kiln. A gas with a low specific gravity is pushed up from below. The pushed up light gas rises one after another, enters the exhaust gas hole 27 again, rises further, passes through the exhaust gas chamber 28 and the exhaust gas vent pipe 29, enters the exhaust gas incineration chamber 31, and is cooled. Descent and repeat circulation. Cooling is performed by a cooling method using a convection action, and when the temperature is 300 ° C. or lower, the entrance door 4 is gradually opened and the kiln is removed.
[0033]
The waste liquid collected in the purification tank 39 as salt water by spraying the sodium hydroxide solution after purification is strongly alkaline, so dilute sulfuric acid is added to neutralize it to PH 7.0 to PH 8.0. Perform sink treatment.
[0034]
【The invention's effect】
Since the present invention is configured as described above, the following effects are achieved.
[0035]
A mixed gas generator is installed outside the firing kiln, and a mixed gas material of salt, pine resin, and boric acid is placed in a dry distillation kiln, heated, and water droplets are injected from a water tank to produce salt gas, hydrocarbon gas, boric acid gas. The four kinds of gas, water vapor gas, can obtain a high-temperature mixed gas with a good balance according to the input amount, and the product is 95% or more of the first-class product.
[0036]
From the start of the hatching operation to the end of the firing chamber, a non-concentrated mixed gas is simultaneously ejected from the entire floor bottom, so that only the hydrocarbon gas first contacts the substrate to form a carbon film, and the salt gas contacts. But it does not cause a hatching reaction. In addition, even when the salt gas lacking the hydrocarbon gas comes into contact, no unreasonable phenomenon such as no formation of a silvery soot has occurred.
[0037]
A gas generating mixed gas generator is provided separately from the firing chamber, and heating is continued in the dry distillation furnace, and a high temperature mixed gas is sent to the firing kiln, so that salt, coal, and soot are introduced into the firing kiln. The combustion chamber like time does not quench rapidly. When the kiln is cooled rapidly, the kiln walls and refractory bricks are cracked and severely damaged. In addition, the product may be a product with poor hatching due to rapid cooling, but this does not happen.
[0038]
Furthermore, by generating mixed gas in a dry distillation kiln, it becomes unnecessary to make a large fire bed by burning a large amount of coal and firewood, and there is no need to scrape a large amount of hot coal or coke when opening the kiln. It was. In addition, since there is no heat stored in charcoal or coke, it is now possible to perform the kiln out process easily.
[0039]
After stopping the kiln, high-temperature gas in the firing kiln is guided outside the kiln and circulated by convection through the exhaust gas incineration chamber and purification tank, making it possible to accelerate cooling by using existing equipment together. .
[0040]
The method of hatching the surface of the substrate of the present invention is not a method of applying a conventional glaze to dissolve the glaze at a high temperature, but the silica existing in the substrate of the fired product comes into contact with the salt gas in the mixed gas. By causing a hatching reaction and obtaining hatching, the base material finished in a small work is also hatched as it is. No small work is buried by hatching or rounded corners.
[0041]
In the treatment of the mixed exhaust gas exhausted from the firing kiln, the hydrocarbon gas in the mixed exhaust gas burns in the combustion chamber, and the salt gas comes into contact with the spray of sodium hydroxide solution in the purification tank. A reduction reaction takes place and the salt gas is reduced to salt water. The salt gas is removed and the harmful gas is purified and no longer causes pollution.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of the entire apparatus.
FIG. 2 is a sectional view taken along line BB. 8 in the figure is a view of the lid (8) as viewed from above.
FIG. 3 is a cross-sectional view taken along the line CC.
FIG. 4 is a cross-sectional view taken along the line AA. It is the figure which looked at a partial baking chamber (24) from the top.
[Explanation of symbols]
1 Firing kiln 31 Exhaust gas incinerator
2 Kiln wall 32 Exhaust gas outlet
3 Kiln floor 33 Incinerator burner
4 Entrance door 34 Exhaust gas outlet cover
5 F 35 Purification tank
6 焚 36 spray nozzle
7 Burner 37 Pipe
8 Mouth cover 38 Power pump
9 Stopper 39 Solution tank
10 Flue 40 Open / close valve
11 Chimney 41 Circulation vent pipe
12 Flue entrance 42 Circulation on-off valve
13 Flue lid 43 Purified gas exhaust pipe
14 Control door 44 Exhaust gas on-off valve
15 Firing room floor 45
16 shore 46 heating chamber
17 Underfloor Railway 47 Entrance
18 gas trunk 48 kiln lid
19 Gas branch pipe 49 Heating outlet
20 Gas outlet 50 Heating burner
21 Firing room 51 Heating kiln chimney
22 hole 52 water tank
23 Fixed fire door 53 Water adjustment valve
24 Combustion chamber 54 Water pipe
25 Removal fire door style 55 Steam generation pipe
26 Suction mouth 56 Metal fiber
27 Exhaust gas hole 57 Steam pipe
28 Exhaust gas chamber 58 Heating kiln
29 Exhaust gas vent pipe 59 Puddle
30 Vent pipe open / close valve

Claims (4)

When the hatching operation is completed, the exhaust gas on / off valve (42) and the exhaust gas outlet (32) are sealed, the circulation on / off valve (44) is opened, and the high temperature gas in the firing kiln (1) rises to the exhaust gas hole (27). Passes through the exhaust gas chamber (28), passes through the exhaust gas incineration chamber (31), is cooled by the outside air, descends in the purification tank (35), passes through the circulation vent pipe (41), and enters the firing kiln (1). Enter the bottom and repeat the up-circulation again to cool.
A method for cooling a kiln having the above-described steps, wherein a high temperature gas of the firing kiln (1) is discharged to an apparatus outside the kiln, and cooling is repeated to obtain a fired silver-colored fired product.   The dry distillation kiln (45) of the heating kiln (58) provided outside the firing kiln (1) is heated with a heating burner (50), and a gas material mixed with salt, pine resin, and boric acid is charged, and the kiln lid (48) Is closed, and combustion continues while dropping water from the water tank (52) to generate hydrocarbon gas, salt gas, boric acid gas, and water vapor gas, and into the firing kiln (1) as a high-temperature mixed gas. A method of forming a fired product of sintered silvery cocoons with a mixed gas, which is fed and brought into contact with the mixed gas and the silica on the surface of the substrate to cause a cocoon reaction to form a silvery cocoon film.   A mixed material that enables mixed gas generation of salt, boric acid, and pine resin, in which a mixed gas material is introduced into a dry distillation kiln (45) and heated to generate a mixed gas in order to obtain a tanned silver-colored cocoon.   The mixed gas flue gas discharged after the hatching reaction of the firing kiln (1) is caused to flow into the exhaust gas incinerator (31), and the hydrocarbon gas is burned using the incinerator burner (33), and then the hydrocarbon The mixed exhaust gas from which the gas has been removed flows into the purification tank (35), sprayed with a sodium hydroxide solution from the ceiling of the purification tank (35), and salt gas flue gas falls as salt water droplets by a reduction reaction, A method for purifying flue gas from a firing kiln (1) to obtain a fired silver candy fired product accumulated in a solution tank (39).

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