JP2009276008A - Vertical type kiln system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertical type kiln system capable of discharging sufficiently cooled products after performing sufficient and constant burning all the time before discharge of materials. <P>SOLUTION: A discharge cylindrical body 23 is provided with a resistance member 31 penetrated through the peripheral wall of the discharge cylindrical body 23 to extend to the radial direction and capable of reciprocating in the radial direction and with a temperature sensor 32 for detecting the temperature of a material M within the discharge cylindrical body 23. When the detection temperature of the material M by the temperature sensor 32 is higher than a predetermined set temperature, the resistance member 31 is made to advance toward the radial inner direction to increase a contact area with the material M to regulate lowering of the material M. When the detection temperature is lower than the predetermined set temperature, the resistance member 31 is made to retract toward the radial outer direction to reduce the contact area to ease the regulation of lowering of the material M. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vertical firing furnace apparatus.

  As a vertical firing furnace apparatus, for example, an apparatus disclosed in Patent Document 1 is known. In Patent Document 1, the furnace space is defined as a preheating space above the hearth and a space of the furnace body extending downward from the hearth as a firing space. The raw material to be fired is deposited on the hearth, and the free surface of the deposited layer facing the combustion chamber receives heat from the combustion of fuel ejected from the burner provided in the furnace lid into the combustion chamber, and the firing space. Is preheated by receiving heat from a hot gas that passes through and penetrates the deposited layer from the free surface. The preheated raw material is sequentially dropped from the free surface side to the opening of the hearth by a pusher or the like to form a deposited layer again in the firing space, and is fired here.

The fired raw material falls as it cools in the discharge cylinder provided immediately below the furnace body and falls as a product from a rotary valve provided at the discharge port formed at the lower end of the discharge cylinder. It is taken out.
JP 08-337447 A

  It is desired that the fired product, which is a product taken out from the discharge port, is always discharged at a constant temperature. This means that the raw material stays in the furnace body for a time sufficient for firing, is fired to the same quality at any time, and is then cooled sufficiently in the discharge cylinder before being discharged.

  However, the firing temperature and firing time vary due to changes in the properties of the raw materials, changes in furnace temperature and product discharge amount, etc., and a product with a constant quality may not always be obtained. It is also possible to adjust the amount of rotation of the rotary valve, control the discharge amount, and adjust the residence time during firing and cooling of the raw material in the furnace body and the residence time during cooling in the discharge cylinder to some extent However, the rotary valve is provided at the lower end of the discharge cylinder, and the cooling condition above it cannot be accurately grasped.After knowing the temperature of the product after discharge from the rotary valve, It is not enough in that it is not possible to deal with any product.

  In view of such circumstances, the present invention is to provide a vertical firing furnace apparatus that can discharge a sufficiently cooled product after always performing sufficient and constant firing before discharging the raw material. Let it be an issue.

  The vertical firing furnace apparatus according to the present invention has an annular plate-like shape that extends radially outward with respect to the vertical center line of the vertical furnace body and has a drop opening formed in the central area in the radial direction. A preheating space is formed by a space surrounded by the hearth, a cylindrical wall extending upward at the outer peripheral position of the hearth, and a lid wall closing the upper end of the cylindrical wall; A firing space is formed in the furnace body that hangs down from the inner edge of the drop opening, a cooling space is formed inside the discharge cylinder that is connected to the furnace body below the furnace body and has a discharge port at the lower end. An annular top plate portion forming a radially outer region portion and a furnace lid portion forming a radially inner region portion from the top plate portion, a raw material supply port on the top plate portion, and a fuel supply port on the cover wall Is provided.

  In such a vertical firing furnace apparatus, in the present invention, the discharge cylinder is provided with a resistance member that extends in the radial direction through the peripheral wall of the discharge cylinder and is reciprocally movable in the same direction. A temperature sensor for detecting the temperature of the raw material in the body is provided. When the temperature detected by the temperature sensor is higher than a predetermined set temperature, the resistance member is advanced inward in the radial direction to contact the raw material. The area is increased to regulate the lowering of the raw material, and when the detected temperature is lower than the set temperature, the resistance member is moved backward in the radial direction to reduce the contact area and relax the lowering of the raw material. It is characterized by that.

  In the vertical firing furnace apparatus configured as described above, the temperature of the raw material in the discharge cylinder that becomes the cooling zone is directly detected by a sensor, and the resistance member is moved forward or backward based on the detected temperature to contact the raw material. In other words, by increasing or decreasing the resistance to the raw material descending in the furnace, the amount of the raw material descending and thus the residence time of the raw material in the furnace is adjusted.

  Specifically, when the detected temperature of the raw material is higher than a predetermined set temperature, the resistance member is advanced toward the inside in the radial direction of the discharge cylinder to increase the contact area with the descending raw material and lower the raw material. To regulate. As a result, the resistance to the raw material descending in the furnace increases, and the residence time of the raw material in the furnace becomes long, and the raw material is sufficiently fired and cooled accordingly. In addition, when the detection temperature of the raw material is lower than a predetermined set temperature, the resistance member is retracted toward the outside in the radial direction of the discharge cylinder to reduce the contact area with the lowering raw material, thereby relaxing the lowering of the raw material. To do. As a result, the resistance to the raw material descending in the furnace is reduced, the residence time of the raw material in the furnace is shortened, and the raw material that has already been sufficiently baked and cooled is discharged from the outlet at an early stage.

  It is preferable that the resistance members are provided at a plurality of positions in the circumferential direction, temperature sensors are provided at positions corresponding to the respective resistance members in the circumferential direction, and each resistance member operates based on the detected temperature of the corresponding temperature sensor. . As a result, at each circumferential position where the resistance member is provided, each resistance member operates on the basis of a temperature sensor provided at the corresponding circumferential position. Uniform product quality can be achieved over the entire circumferential direction.

  An inside of the discharge cylinder has an air receiving box for receiving cooling air from the outside through an air receiving pipe extending in the radial direction, and an air supply device for supplying the cooling air upward from the air receiving box is arranged. And it is preferable that the resistance member is provided in the absence area of the said receiving pipe in the circumferential direction.

  When the air supply device is provided in the discharge cylinder, the raw material descending from above the air supply device comes into contact with the upper surface of the air receiving tube extending in the radial direction. Therefore, by providing the resistance member in the circumferential direction in the absence area of the above-described air intake pipe, that is, in a position not overlapping with the air intake pipe, the position of the resistance member can be adjusted without being affected by the presence of the air intake pipe. It becomes possible.

  The resistance member is formed with a hollow hole extending in the longitudinal direction of the resistance member, and a downwardly blowing air hole is formed in communication with the hollow hole, and cooling air received from the outside passes through the hollow hole. It is preferable that the gas is blown from the fumaroles. Thus, by providing the fusible holes in the resistance member, when the resistance member moves forward to ensure a longer residence time for cooling the raw material, the fumaroles formed in the resistance member are discharged. The raw material that advances toward the inside of the cylinder and is located below the resistance member is cooled by the cooling air that is blown from the blow hole. At that time, if the fusible holes are distributed in the longitudinal direction of the resistance member, the larger the advancement amount of the resistance member, the greater the amount of blown air, and a favorable result can be obtained at the forward position where cooling is desired to proceed. In this way, it is possible to improve the cooling effect of the raw material in the discharge cylinder.

  It is preferable that the resistance member reaches a raw material absence space formed with an angle of repose just below the air supply device when the tip of the resistance member is in the foremost position. The free surface of the raw material deposition layer that forms the raw material absence space is cooled earlier than the inside of the raw material deposition layer because it is in direct contact with the raw material absence space. When the resistance member is advanced inside the raw material deposition layer and the tip of the resistance member reaches the raw material absence space, the already sufficiently cooled raw material located on the free surface of the raw material deposition layer is It is pushed out by the tip of the resistance member and falls to the discharge port. And in the place where the raw material fell on the free surface, the raw material appeared on the surface of the raw material deposition layer, which was under the free surface before the resistance member moved forward, and formed a new free surface. It cools in direct contact with the air in the raw material absence space. In this manner, the cooling of the raw material can be promoted by advancing the resistance member to newly expose the raw material in the raw material deposition layer to the free surface of the raw material deposition layer.

  As described above, the present invention is provided with a temperature sensor that detects the temperature of the raw material and a resistance member that variably regulates the lowering of the raw material in the discharge cylinder that cools and lowers the raw material after firing. Therefore, the residence time in the furnace body for firing the raw material and the residence time in the discharge cylinder for cooling can be set optimally, and is always sufficiently and constant. Get quality fired products.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a longitudinal sectional view of a vertical firing furnace apparatus according to the present embodiment. As shown in FIG. 1, the vertical firing furnace apparatus 1 includes a raw material and fuel supply unit I, a preheating unit II, a firing unit III, and a discharge unit IV in this order from above.

  The raw material and fuel supply unit I is provided above the preheating unit II, has a raw material storage tank (not shown), and stores the raw material M in its internal space. The raw material M is introduced into the raw material storage tank by a conveyor or the like (not shown), and dropped into the preheating section II through the raw material supply pipes 2 provided from a plurality of positions in the circumferential direction of the bottom wall of the raw material storage tank. Supplied.

  As shown in FIG. 1, a preheating section II is provided below the raw material and fuel supply section I. The preheating unit II includes a cylindrical wall 4 that hangs down from the peripheral edge of the non-rotating lid wall 3, and an upper end of a vertical cylindrical furnace body 5 that rotates relative to the cylindrical wall 4 to a lower end position of the cylindrical wall 4. A preheating space is formed in a space between the hearth 6 extending in the radial direction.

  The lid wall 3 has a central furnace lid portion 7 and a top plate portion 8 positioned around the furnace lid portion 7, and the furnace lid portion 7 has a substantially spherical shape, It is connected to the inner edge of the top plate portion 8 by a short tube portion 9 that hangs from the periphery. The top plate portion 8 is connected to the raw material supply pipes 2 at a plurality of positions in the circumferential direction, and the raw material M dropped and supplied from the raw material supply pipes 2 is deposited on the hearth 6. The upper surface of the layer is formed in a space between the tubular wall 4 and the short tubular portion 9 with an angle of repose. A fuel supply port 10 is provided at a central position of the furnace lid portion 7, and the fuel supplied from the fuel supply port 10 is burned in a combustion chamber formed below the furnace lid portion 7. Expands into the combustion chamber. The cylindrical wall 4 supports rod-like pushers 11 extending in the radial direction and reciprocating in the same direction at a plurality of positions in the circumferential direction. By the reciprocating motion of the pusher 11, a drop opening 12 formed in the center of the hearth 6 from the free surface where the deposited layer of the raw material M formed on the hearth 6 faces the combustion chamber with an angle of repose. After that, the raw material M falls.

  The raw material supply pipe 2 is provided with a branch pipe extending in an upward oblique direction outside the preheating section II, and the branch pipe forms an exhaust pipe 13. The exhaust pipe 13 is connected to a device (not shown) for processing exhaust gas.

  Below the preheating part II, a firing part III is formed with the inside of the vertical cylindrical furnace body 5 extending downward from the drop opening 12 of the hearth 6 as a firing space.

  The furnace body 5 forming the firing part III is rotationally driven around a vertical center line by a driving means (not shown), and is located between the outer peripheral edge of the hearth 6 and the lower edge of the cylindrical wall 4. In the rotary seal 6A, relative rotation with the non-rotating cylinder wall 4 is allowed in a sealed state.

  The furnace body 5 is slightly expanded downward from the position of the drop opening 12 of the hearth 6, then extends downward in a vertical cylindrical shape, and is reduced in diameter downward at the lower part. In the furnace body 5, as shown in FIG. 1, a feed cylinder 14 is arranged on the vertical center line of the furnace body 5. The feed cylinder 14 is supported by being connected to the furnace body 5 by bridges 15 extending in the radial direction at a plurality of positions in the circumferential direction. The feed cylinder 14 may be a conventionally used ejector as shown in FIG. 1, and the lower inner diameter surface may have a throat and be expanded upward. Instead, a cylindrical inner surface having the same diameter in the vertical direction may be used.

  FIG. 2 is a partially enlarged view of the vertical firing furnace apparatus 1 shown in FIG. 1 and shows a lower region of the furnace body 5 and a discharge part IV in the firing part III. An air blowing device 16 is provided in the lower area in the furnace body 5. The air blowing device 16 has an air supply box 17 and a blow pipe 18 attached thereto, and the air supply box 17 has a support arm 19 extending in the radial direction at a plurality of positions in the circumferential direction. Is supported by the furnace body 5. The air blowing device 16 receives air from the outside through a pipe 20 connected to the lower part of the air supply box 17 and, as shown in FIG. 1, the tip of the blowing pipe 18 connected to the upper part ( Air is blown upward from the upper end in the figure. The upper end of the outlet pipe 18 is located in the lower opening of the feed cylinder 14. A plurality of small window portions are formed on the side surface of the air supply box 17, as shown in FIG. 2, and an eaves-like swash plate 21 is provided on the upper edge of the window portion. Accordingly, a non-existing region of raw materials and the like is formed immediately below the swash plate 21, and a part of the external air sent into the air supply box 17 is blown out sideways from the window portion. The furnace body 5 is allowed to rotate relative to the non-rotating discharge part IV provided below the furnace body 5 in a sealed state by a rotary seal 22.

  The discharge part IV has a substantially conical discharge cylinder 23 whose diameter is reduced downward, and has an air supply device 25 inside. The discharge cylinder 23 has a discharge port 23A at the lower end, and a rotary valve 24 is provided in the discharge port 23A. By rotating the rotary valve 24, the raw material M that has been sufficiently baked and cooled, that is, the product, is discharged to the outside while sealing the inside and outside of the furnace.

  FIG. 3 is a perspective view showing the air supply device 25. As shown in FIGS. 2 and 3, the air supply device 25 includes an air receiving box 26 having a truncated cone shape, and one pipe extending radially outward from the air receiving box 26 at a plurality of circumferential positions. And two kinds of intake pipes 27A and 27B formed so as to partition the inside of the upper and lower sides. The interior of the air receiving box 26 is divided into an upper chamber 26A and a lower chamber 26B.

  Of the two types of intake pipes 27A, 27B, the upper space in one of the intake pipes 27A is open at the front end side in the extending direction, and the upper space communicates the upper chamber 26A of the reception box 26 with the outside. ing. The air receiving tube 27A receives air from the outside in the upper space. As is often seen in FIG. 2, the lower space in the air receiving pipe 27A is closed at the front end side in the extending direction, and the air receiving box 26 side is opened, and the lower chamber 26B of the air receiving box 26 is opened. Communicated with.

  The lower space in the other air receiving pipe 27B is open at the front end side in the extending direction, and the lower space communicates the lower chamber 26B of the air receiving box 26 with the outside. The air receiving tube 27B receives air from the outside in the lower space. As is often seen in FIG. 2, the upper space in the air receiving tube 27B is closed at the front end side in the extending direction and opened on the air receiving box 26 side. Communicate.

  In the present embodiment, as shown in FIG. 3, two air receiving tubes 27 </ b> A and two air receiving tubes 27 </ b> B extend from the air receiving box 26. The air receiving pipe 27A and the air receiving pipe 27B are provided at positions facing each other in the radial direction of the air receiving box 26, and extend in directions away from each other on the same straight line.

  As shown in FIG. 2, the upper chamber 26 </ b> A of the air receiving box 26 is connected to the air sending box 17 by the pipe 20. A conical cylinder portion 28 extends in an umbrella shape from the lower portion of the air receiving box 26, and a blow-out pipe 29 that blows air downward from the lower chamber 26 </ b> B of the air receiving box 26 in the conical cylinder portion 28. Is extended. In addition, a plurality of blowout holes 30 for blowing air downward are formed on the lower surface of the air receiving pipe 27B and the lower surface of the portion that forms the lower space in the air receiving pipe 27A positioned facing the air receiving pipe 27B. Yes.

  Thus, after the outside air received in the upper chamber 26A via the air receiving pipe 27A reaches the air sending box 17 from the pipe 20, it is blown upward from the air blowing pipe 18 and the air from the air sending box 17 A part is blown out from the window of the air supply box 17 to the side. On the other hand, outside air received in the lower chamber 26B via the air receiving pipe 27B is blown out from the plurality of blowing pipes 29 to the space where there is no raw material formed with an angle of repose just below the conical cylinder part 28, The air is blown out from the plurality of air outlets 30 to the space formed immediately below the air receiving pipe 27B and the air receiving pipe extension 27B-1. The air blown out from these blow pipes 29 and blow holes 30 cools the free surface of the raw material deposition layer in the space and then moves up in the raw material deposition layer.

  The flow rate of the air blown out from the blowing pipe 18 and rising to the combustion chamber through the feed cylinder 14 and the air permeating and rising through the raw material deposition layer outside the feed cylinder 14 and reaching the combustion chamber can be adjusted. It is preferable that This flow rate ratio is set so that the temperature of the deposited layer becomes a predetermined value. When the feed cylinder 14 is an ejector having a throat as shown in FIG. 1, the pressure at the lower end opening of the feed cylinder 14 is greatly negative and the air in the deposition layer does not flow into the lower end opening. Thus, it is desirable not to increase the flow rate of the blown air from the blowout pipe 18. The fact that the air in the deposition layer flows into the lower end opening means that the air in the deposition layer above the lower end opening falls in the deposition layer, and the air rises in the deposition layer and burns. This is because the function of reaching the chamber and promoting the combustion in the combustion chamber as combustion air in combination with the air from the inside of the feed cylinder 14 is reduced.

  In the discharge part IV, below the air supply device 25, a plurality of resistance members 31 are provided that extend in the radial direction through the peripheral wall of the discharge cylinder 23 and can reciprocate in the same direction. In the present embodiment, the resistance member 31 has a rod shape. As shown in FIG. 3, the resistance member 31 is located in a region where the intake pipes 27 </ b> A and 27 </ b> B are not present in the circumferential direction of the discharge cylinder 23, that is, at a position shifted from the intake pipes 27 </ b> A and 27 </ b> B in the circumferential direction. Is provided. In the present embodiment, the resistance member 31 is set so as to reach the raw material absence space formed immediately below the conical cylinder portion 28 when the tip of the resistance member 31 is at the foremost position. .

  As shown in FIG. 2, a temperature sensor that detects the temperature of the raw material M at a position corresponding to each resistance member 31 in the circumferential direction between the air supply device 25 and the resistance member 31 in the height direction. 32 is provided, and each resistance member 31 operates based on the temperature detected by the corresponding temperature sensor 32. Specifically, each resistance member 31 moves forward inward in the radial direction of the discharge cylinder 23 when the temperature detected by the temperature sensor 32 at the corresponding position is higher than a predetermined set temperature. The contact area with the raw material M descending inside, in other words, the resistance to the descending raw material M is increased to regulate the descending of the raw material M, and when the detected temperature is lower than the set temperature, it is directed outward in the radial direction. By retreating, the contact area is reduced and the regulation of the lowering of the raw material M is relaxed.

  In the present embodiment, the temperature sensor 32 is provided between the air supply device 25 and the resistance member 31 in the height direction. However, the position where the temperature sensor 32 is provided is not limited to this. For example, the resistance member 31 is provided. It may be provided below. That is, the temperature sensor 32 only needs to be provided at a position where the temperature of the raw material M in the discharge cylinder 23 can be detected.

  In the present embodiment, the set temperature is set to an optimum temperature for taking out the raw material M as a product, that is, a temperature after the raw material M is sufficiently cooled. That is, in the present embodiment, the fact that the detected temperature of the raw material M is higher than the predetermined set temperature means that the time for cooling the raw material M in the furnace body 5 and the discharge cylinder 23, that is, the residence time is not sufficiently secured. It also means that the raw material M may not be sufficiently fired because the residence time in the furnace body 5 is short. Therefore, when the detected temperature of the raw material M is higher than a predetermined set temperature, the dwell time of the raw material M in the furnace body 5 and the discharge cylinder 23 is reduced by advancing the resistance member 31 to restrict the lowering of the raw material M. Since the length can be increased, the raw material M can be sufficiently baked and cooled before the raw material M is discharged from the discharge port 23A.

  On the other hand, the detection temperature of the raw material M being lower than the predetermined set temperature means that the time for cooling the raw material M in the furnace body 5 and the discharge cylinder 23, that is, the residence time is sufficiently secured, Moreover, since the residence time in the furnace main body 5 is ensured enough, it also means that the raw material M is fully baked. Therefore, when the detected temperature is lower than the set temperature, the residence time in the five furnace bodies and the discharge cylinder 23 can be shortened by retreating the resistance member 31 to relax the restriction of the lowering of the raw material M. It becomes possible to take out the raw material M fired and cooled at an early stage from the outlet 23A. Each resistance member 31 can be stopped not only at the foremost position, which is a fully advanced position, and at the end position, which is a fully retracted position, but also at a position between the foremost position and the last position. The contact area with the raw material M can be finely adjusted.

  As described above, in this embodiment, the temperature sensor 32 operates the resistance member 31 back and forth based on the detected temperature to adjust the descending amount of the raw material M, so that the inside of the furnace main body for firing and cooling the raw material M is obtained. The residence time of 5 and the residence time in the discharge cylinder 23 for cooling can be set optimally, so that a fired product with sufficient and constant quality can always be obtained.

  Further, in the present embodiment, each resistance member 31 operates based on the temperature detected by the temperature sensor 32 provided at a corresponding position in the circumferential direction of the discharge cylinder 23, so the resistance member 31 is provided. The descending amount of each raw material M is adjusted at each position. As a result, the firing and cooling state of the raw material M is made uniform over the entire circumferential direction, so that a product with a constant quality can be obtained better.

  The air receiving pipes 27A and 27B of the air supply device 25 provided above the resistance member 31 have their upper surfaces in contact with the raw material M descending from above the air supply device 25, thereby reducing the resistance when the raw material M is lowered. Cause it to occur. In the present embodiment, the resistance member 31 is provided in a region where the intake pipes 27A and 27B are not present in the circumferential direction of the discharge cylinder 23, that is, in a position shifted from the intake pipes 27A and 27B in the circumferential direction. The resistance of the descending material M can be increased or decreased by adjusting the position of the resistance member 31 without being affected by the presence of the intake pipes 27A and 27B.

  Further, in the present embodiment, as described above, the resistance member 31 reaches the raw material absence space formed immediately below the conical cylinder portion 29 when the tip of the resistance member 31 is in the foremost position. Therefore, by moving the resistance member 31 forward until it reaches the foremost position, the material M located on the free surface of the material deposition layer forming the material absence space is dropped to cool the material M Can also be promoted.

  That is, the free surface of the raw material deposition layer is cooled earlier than the inside of the raw material deposition layer because the free surface of the raw material deposition layer is in direct contact with the raw material absence space and the air blown out from the blow-out pipe 29 is directly hit. As the member 31 advances, the material M, which is already sufficiently cooled and located on the free surface, is pushed out to the tip of the resistance member 31 and falls. Then, at the location where the raw material M has fallen on the free surface, the raw material M that was under the free surface before the resistance member 31 moved forward appears on the surface of the raw material deposition layer to form a new free surface, The raw material M is cooled by the air in the raw material absence space and the air blown out from the blow-out pipe 29. Thus, the cooling of the raw material M can be promoted by moving the resistance member 31 forward to expose the raw material M in the raw material deposition layer to the free surface of the raw material deposition layer.

  However, since the resistance member 31 is a member that originally has a role of adjusting the amount of lowering of the raw material M by staying in the forward or backward position, the raw material M on the free surface of the raw material deposition layer described above. It is preferable that the operation of dropping the material is performed to such an extent that the original role of the resistance member 31 for adjusting the amount of lowering of the raw material M is not impaired, such as reciprocating the resistance member 31 a small number of times in a short time.

  Next, the operation principle of the apparatus of this embodiment as described above will be described.

  First, the raw material M is thrown into the raw material storage tank and stored. The stored raw material M falls in the raw material supply pipe 2 and forms a deposition layer on the hearth 6 with an angle of repose.

Fuel is supplied from a fuel supply port 10 located in the furnace lid 7 and burns in a combustion chamber directly below the furnace lid 7. The combustion gas generated by this combustion heats the deposited layer of the raw material M on the hearth 6 from its free surface. Thus, the raw material M preheated by being heated on the hearth 6 gradually falls from the free surface of the deposited layer to the furnace body 5 through the drop opening 12 by the action of the pusher 11.

  The preheated raw material M that has fallen from the drop opening 12 forms a deposition layer again in the furnace body 5. The raw material M of the deposited layer gradually falls as the raw material M after firing is sequentially taken out by the rotation of the rotary valve 24 provided at the discharge port 23A. The raw material M is sufficiently baked until it reaches the discharge port 23A, and the deposited layer after being blown from the air blown out from the window portion of the air supply box 17 and the blowout pipe 29 and the blowout hole 30. When the raw material M reaches the outlet 23A by the air rising up, it is sufficiently cooled.

  The air sent out from the window portion of the air supply box 17 and the air blown out from the blow-out pipe 29 and the blow-out hole 30 are heated from the raw material M while cooling the raw material M while ascending the deposition layer of the raw material M. To reach the upper surface of the deposited layer. The heated air and the air sent upward from the feed cylinder 14 contribute to combustion in the combustion chamber, and are kept in the combustion chamber for a long time by raising the combustion gas in the combustion chamber. Make heating on the free surface of the upper deposited layer effective. In addition, the combustion gas which permeate | transmitted the deposition layer on this hearth 6 is exhausted from the exhaust pipe 13 as waste gas.

  Thus, the fired and cooled raw material M is taken out as a product from the outlet 23A.

  The present invention is not limited to the above-described embodiment shown in the drawings, and various modifications can be made. For example, in the above embodiment, the resistance member is a solid rod-shaped member. Instead, the resistance member has a hollow hole extending in the longitudinal direction of the resistance member and is directed downward. The air holes may be formed so as to communicate with the hollow hole, and cooling air received from outside may be blown out from the air hole through the hollow hole. As a result, the cooling air blown from the resistance member cools the free surface of the raw material deposition layer that forms a space immediately below the resistance member, so that the cooling effect of the raw material M is further improved.

  Further, the resistance member may be a plate-like member, a rod-like member or a tubular member having a blade attached thereto. In that case, the shape seen from above can be narrow on the tip side (inner side of the furnace) and wide on the root side (furnace wall side in the furnace).

It is a longitudinal cross-sectional view of the vertical baking furnace apparatus which concerns on this embodiment. FIG. 2 is a partially enlarged view of the vertical firing furnace apparatus shown in FIG. 1. It is a perspective view which shows an air_supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vertical firing furnace apparatus 2 Raw material supply pipe 3 Lid wall 4 Cylinder wall 5 Furnace main body 6 Furnace floor 7 Furnace lid part 8 Top plate part 10 Fuel supply port 23 Exhaust cylinder 23A Exhaust port 25 Air supply apparatus 26 Inlet box 27A Receiving pipe 27B Receiving pipe 31 Resistance member 32 Temperature sensor

Claims (5)

  An annular plate-shaped hearth that extends radially outward with respect to the vertical center line of the furnace main body at the top of the vertical furnace main body and has a drop opening formed in the radial central region; A preheat space is formed by a space surrounded by a cylindrical wall extending upward at the outer peripheral edge of the hearth and a lid wall that closes the upper end of the cylindrical wall, and firing is performed in the furnace body that hangs down from the inner edge of the drop opening of the hearth An annular top plate which forms a space, forms a cooling space inside a discharge cylinder which is connected to the furnace body below the furnace body and has a discharge port at the lower end, and the lid wall forms a radially outer region portion A vertical firing furnace apparatus having a portion and a furnace lid portion forming a radially inner region from the top plate portion, a raw material supply port on the top plate portion, and a fuel supply port on the lid wall, When the discharge cylinder is provided with a resistance member that extends in the radial direction through the peripheral wall of the discharge cylinder and can be reciprocated in the same direction. In addition, a temperature sensor for detecting the temperature of the raw material in the discharge cylinder is provided, and when the detection temperature of the raw material by the temperature sensor is higher than a predetermined set temperature, the resistance member is moved forward inward in the radial direction. The contact area with the raw material is increased to regulate the lowering of the raw material, and when the detected temperature is lower than the set temperature, the resistance member is moved backward in the radial direction to reduce the contact area to reduce the lowering of the raw material. A vertical firing furnace characterized by relaxing regulations.   The resistance members are provided at a plurality of positions in the circumferential direction, temperature sensors are provided at positions corresponding to the respective resistance members in the circumferential direction, and each resistance member is operated based on the temperature detected by the corresponding temperature sensor. The vertical firing furnace apparatus according to claim 1.   An inside of the discharge cylinder has an air receiving box for receiving cooling air from the outside through an air receiving pipe extending in the radial direction, and an air supply device for supplying the cooling air upward from the air receiving box is arranged. The vertical firing furnace apparatus according to claim 1 or 2, wherein the resistance member is provided in a region where the intake pipe is absent in the circumferential direction.   The resistance member is formed with a hollow hole extending in the longitudinal direction of the resistance member, and a downwardly blowing air hole is formed in communication with the hollow hole, and cooling air received from the outside passes through the hollow hole. 4. The vertical firing furnace apparatus according to claim 1, wherein the vertical firing furnace apparatus is configured to be blown from the blow holes.   The resistance member, when the tip of the resistance member is in the foremost position, reaches a raw material absence space formed with an angle of repose immediately below the air supply device. The vertical firing furnace apparatus according to claim 4.

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