JP2014126232A - Waste charging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste charging apparatus capable of restricting an eccentric accumulation of waste in a waste melting furnace.SOLUTION: A waste charging apparatus 2 comprises: an intermediate hopper 5 arranged above a waste melting furnace 1; an upper seal valve 11 for opening or closing an upper opening 5a of the intermediate hopper 5; a first rotary shaft 12A, a second rotary shaft 12B arranged around a lower opening 5b so as to hold the lower opening 5b of the intermediate hopper 5 and to hold a center axis CL1 of a side wall 1a of the waste melting furnace 1 and extending in a horizontal direction so as to be in parallel to each other; a lower seal valve 14 extending out of the first rotary shaft 12A toward the second rotary shaft 12B so as to block all the areas of the lower opening 5b, rotated downward around the first rotary shaft 12A to release the lower opening 5b; and a guide plate 15 extending downward from the second rotary shaft 12B to rotate around the second rotary shaft 12B so as to adjust a dropping direction of the waste.

Description

  The present invention relates to a waste charging apparatus for charging waste into a waste melting furnace.

  An upper hopper for receiving waste from above and a lower opening for sending waste downward, an intermediate hopper disposed above the waste melting furnace, an upper seal valve for opening and closing the upper opening, There is known a waste charging apparatus including a lower seal valve that opens and closes a side opening (see, for example, Patent Document 1). In the waste charging apparatus described in Patent Document 1, the lower seal valve is a single-open swing type valve, and rotates downward about an axis extending in the horizontal direction around the lower opening. Open the lower opening. The intermediate hopper receives the waste through the upper opening and sends the waste into the waste melting furnace through the lower opening. Since the upper seal valve and the lower seal valve are respectively provided in the upper opening and the lower opening, when the upper opening is opened, the lower opening is closed and when the lower opening is opened. It is possible to charge the waste while closing the upper opening and blocking the internal space and the external space of the waste melting furnace.

JP 2007-225196 A

  Wastes have various sizes and shapes, unlike general powder particles, and the wastes stored in the intermediate hopper tend to move together as a group intertwined with each other. For this reason, when the lower opening is opened by the waste charging device described above, the waste tends to be held in the intermediate hopper until the lower seal valve rotates to some extent. Further, when the inclination angle of the lower seal valve reaches, for example, about 45 to 60 °, there is a tendency to slide down the slope at a stretch. Since the waste has such characteristics, a horizontal component tends to be generated in the falling speed of the waste. Thereby, depending on the position of the lower seal valve, the waste may not fall into the center of the waste melting furnace. In this case, near the inner surface of the side wall of the waste melting furnace, the portion where the waste is deposited higher than the vicinity of the center of the side wall (hereinafter referred to as a high accumulation portion) and the waste is deposited lower than the vicinity of the center of the side wall. The portion (hereinafter, referred to as a low accumulation portion) occurs, and the deviation in the height of accumulation of waste (hereinafter referred to as uneven accumulation) increases.

  Here, coke or the like burns at the bottom of the waste melting furnace, and high-temperature furnace gas is generated. As the gas in the furnace rises through the accumulated waste, the waste is dried and thermally decomposed. In the high accumulation part, the rising distance of the in-furnace gas until passing through the waste is longer than in the low accumulation part. Furthermore, since the drop impact at the time of waste charging is concentrated on the high accumulation part, the waste in the high accumulation part is densified. For this reason, in the high deposition part, the ventilation resistance of the gas in the furnace is higher than in the low deposition part. For these reasons, it is difficult for the high deposition part to pass the gas in the furnace compared to the low deposition part, and most of the gas in the furnace flows to the low deposition part, and the efficiency of drying or pyrolysis of the waste is reduced. If the efficiency of drying or pyrolysis is reduced, the volume of waste is difficult to be reduced, and the waste tends to stagnate. When the waste is stagnated, the uneven accumulation of waste becomes even larger. Such a vicious cycle may cause various problems such as an increase in consumption of coke and the like.

  In order to suppress the uneven accumulation of waste, it is conceivable to shift the position of the waste charging device with respect to the center of the waste melting furnace so that the waste falls to the center of the waste melting furnace. If the position of the waste charging device is shifted only in the horizontal direction, the waste falling path may be removed from the opening at the top of the waste melting furnace. It is necessary to shift. However, it is often difficult to raise the position of the waste charging device due to restrictions such as the height of the building of the waste treatment facility. For this reason, it was difficult to suppress the uneven accumulation of waste in the waste melting furnace.

  Then, an object of this invention is to provide the waste charging device which can suppress the uneven accumulation of the waste in a waste melting furnace.

  A waste charging device according to the present invention is a waste charging device for charging waste from above into a waste melting furnace having a cylindrical side wall extending in the vertical direction. An upper opening for receiving the waste and a lower opening for sending waste downward, an intermediate hopper disposed above the waste melting furnace, an upper seal valve for opening and closing the upper opening, and a lower opening First and second rotating shafts arranged in the periphery of the lower opening and extending in the horizontal direction so as to be parallel to each other so that the central axis of the side wall of the waste melting furnace is sandwiched And projecting from the first pivot shaft to the second pivot shaft side so as to close the entire area of the lower opening, and pivoting downward about the first pivot shaft to lower the lower opening. The lower seal valve to be opened and the second rotation shaft project downward, and rotate around the second rotation shaft to be discarded. And a guide plate for adjusting the dropping direction of the object.

  According to such a waste charging device, when the lower opening is opened, both the lower seal valve and the guide plate protrude downward, and are sandwiched between the lower seal valve and the guide plate. Therefore, the direction in which the waste falls is regulated. The first rotation shaft and the second rotation shaft are arranged so as to sandwich the central axis of the side wall of the waste melting furnace. For this reason, waste can be brought close to the central axis by the lower seal valve and the guide plate, and the falling direction of the waste can be made to follow the central axis. Furthermore, the waste drop position can be adjusted by rotating the lower seal valve and the guide plate. Therefore, it is possible to suppress the uneven accumulation of waste in the waste melting furnace.

  The rotation range of the guide plate may be set so that the tip of the guide plate passes through the central axis. In this case, a sufficient adjustment range of the waste falling direction can be ensured, and the uneven accumulation of waste can be more reliably suppressed.

  Projecting from the second pivot shaft to the first pivot shaft side so as to support the tip portion of the lower seal valve, the second seal shaft is positioned below the tip portion of the lower seal valve. You may further provide the lock member which rotates to the center and retracts from the rotation range of the front-end | tip part of a lower seal valve. In this case, when a load such as a drop impact of waste acts on the lower seal valve, the lower seal valve is firmly sealed and supported by the lock member. Thereby, a lower side opening part can be obstruct | occluded more firmly. Further, since the second rotation shaft is used for both the rotation of the lock member and the rotation of the guide plate, the structure of the waste charging device can be simplified.

  When the lock member and the guide plate rotate together, and the lock member supports the tip of the lower seal valve, the guide plate extends in an obliquely downward direction toward the first rotation shaft, and the guide plate extends. When the direction is vertically downward, the lock member may be located outside the rotation range of the tip of the lower seal valve. In this case, the lock member can be reliably disposed under the lower seal valve without being obstructed by the guide plate. Further, the lower opening can be opened without tilting the guide plate to the opposite side of the central axis. If the guide plate is inclined to the opposite side of the central axis at the time when the waste starts to fall, it is difficult to bring the falling direction of the waste toward the central axis. Therefore, it is possible to more reliably suppress waste accumulation by opening the lower opening without inclining the guide plate to the opposite side of the central axis.

  According to the waste charging apparatus according to the present invention, it is possible to suppress the uneven accumulation of waste in the waste melting furnace.

It is sectional drawing which shows the structure of 1st Embodiment of the waste charging device which concerns on this invention. It is sectional drawing which shows a lower seal valve and a guide plate when charging a waste material and coke. It is sectional drawing which shows the fall state of the waste when the guide plate is not provided. It is sectional drawing which shows the fall state of the waste in case the guide plate is provided. It is sectional drawing of a lower side seal valve and a guide plate when charging only coke. It is sectional drawing which shows the structure of 2nd Embodiment of the waste charging device which concerns on this invention. FIG. 7 is a cross-sectional view showing a state in which the extending direction of the guide plate in FIG. 6 is directed vertically downward.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are denoted by the same reference numerals, and redundant description is omitted.

  A waste charging device 2 shown in FIG. 1 is a device for charging waste into the waste melting furnace 1. The waste melting furnace 1 has a cylindrical side wall 1a extending in the vertical direction. The upper portion of the side wall 1a is reduced in diameter to form a charging opening 1b that opens upward. The waste melting furnace 1 performs drying, thermal decomposition, combustion, and melting of the waste charged from the charging opening 1b.

  The waste charging device 2 is disposed on the waste melting furnace 1 and charges the waste into the waste melting furnace 1 from the charging opening 1b. The waste charging device 2 includes a waste chute 3 for guiding the waste into the charging opening 1b, a waste receiving hopper 4 for receiving the waste, and the waste chute 3 and the waste receiving hopper 4 between them. An intermediate hopper 5 that intervenes and delivers waste and an auxiliary material charging device 6 that stores auxiliary material and charges the intermediate material in the intermediate hopper 5 are provided. Secondary materials are fuel, basicity adjusters, and the like. The fuel is coke, for example, and the basicity adjusting agent is lime, for example.

  The waste chute 3 has an inner cylinder 7 that is inserted into the charging opening 1 b and a guide portion 8 that is continuous with the upper end of the inner cylinder 7, and is fixed to the upper end of the waste melting furnace 1. The central axis of the inner cylinder 7 coincides with the central axis CL1 of the side wall 1a, and the lower end portion of the inner cylinder 7 opens downward in the upper part of the waste melting furnace 1. The guide portion 8 is connected to the upper end portion of the inner cylinder 7, and includes a side wall 9 that surrounds the central axis CL <b> 1 and a top plate 10 that closes the upper portion of the side wall 9.

  A part of the side wall 9 in the circumferential direction is an inclined wall portion 9a that is inclined so as to move away from the central axis CL1 as it goes upward. A portion of the side wall 9 opposite to the inclined wall portion 9a is a vertical wall portion 9b along the central axis CL1. For this reason, the cross-sectional shape of the side wall 9 spreads toward the inclined wall portion 9a as it goes upward.

  The intermediate hopper 5 is a cylindrical body that extends in the vertical direction. The upper end of the intermediate hopper 5 forms an upper opening 5a that opens upward, and the lower end of the intermediate hopper 5 is a lower opening 5b that opens downward. Is configured. The intermediate hopper 5 is disposed on the guide portion 8, and the lower end portion of the intermediate hopper 5 is inserted through the top plate 10 of the guide portion 8. Accordingly, the upper opening 5 a is opened outside the guiding portion 8, and the lower opening 5 b is opened inside the guiding portion 8.

  The central axis CL2 of the intermediate hopper 5 is shifted to the inclined wall portion 9a side with respect to the central axis CL1 of the side wall 1a of the waste melting furnace 1, and a part of the lower opening 5b is located inside the inclined wall portion 9a. It is located on the slope M1. On the intermediate hopper 5, an upper seal valve 11 for opening and closing the upper opening 5a is provided. The upper seal valve 11 slides in the horizontal direction to open and close the upper opening 5a and presses the valve member 11a located on the upper opening 5a from above to seal the upper opening 5a. And a pressing ring 11b.

  The valve member 11a is driven through a chain, a belt, a hydraulic cylinder, or the like by a power source such as an electric motor or hydraulic pressure. The central axis of the pressing ring 11b coincides with the central axis CL2 of the intermediate hopper 5, and the inner diameter of the pressing ring 11b is larger than the inner diameter of the upper opening 5a. The pressing ring 11b is driven by, for example, a hydraulic or pneumatic cylinder.

  In the guide portion 8, two rotation shafts 12 </ b> A and 12 </ b> B that extend in the horizontal direction so as to be parallel to each other are provided. The rotation shafts 12A and 12B are parallel to the inclined wall portion 9a. The rotating shaft 12A is located slightly below the lower opening 5b and is located on the inclined wall 9a side around the lower opening 5b. The rotating shaft 12B is located on the side of the vertical wall 9b around the lower opening 5b. The rotation shaft 12B is located between the central axis CL1 of the side wall 1a of the waste melting furnace 1 and the vertical wall portion 9b. That is, the rotating shafts 12A and 12B sandwich the lower opening 5b in plan view and sandwich the central axis CL1.

  End portions of the rotation shafts 12A and 12B penetrate the side wall 9. Outside the side wall 9, drive devices 13A and 13B are provided which are connected to the ends of the rotation shafts 12A and 12B and rotate the rotation shafts 12A and 12B, respectively. The power source of the drive devices 13A and 13B is, for example, an electric motor or a hydraulic cylinder. Furthermore, an angle sensor such as a rotary encoder that detects the rotation angle of the ends of the rotation shafts 12A and 12B may be provided.

  A plate-like lower seal valve 14 is provided on the outer periphery of the rotation shaft 12A so as to protrude from the rotation shaft 12A toward the rotation shaft 12B so as to close the entire area of the lower opening 5b. The lower seal valve 14 presses against the lower opening 5b from below and seals the lower opening 5b. The lower seal valve 14 is fixed to the rotating shaft 12A and rotates together with the rotating shaft 12A. That is, the lower seal valve 14 is driven by the driving device 13A of the rotating shaft 12A and rotates around the rotating shaft 12A. When the lower seal valve 14 is rotated downward by the driving device 13A, the lower opening 5b is opened.

  A plate-shaped guide plate 15 is provided on the outer periphery of the rotation shaft 12B so as to project downward from the rotation shaft 12B. The guide plate 15 is fixed to the rotation shaft 12B and rotates together with the rotation shaft 12B. That is, the guide plate 15 is driven by the drive device 13B of the rotation shaft 12B and rotates around the rotation shaft 12B.

  The rotary shafts 12A, 12B, the lower seal valve 14 and the guide plate 15 are configured to satisfy the following conditions. When the protruding direction P1 of the guide plate 15 is vertically downward, the protruding direction P2 of the lower seal valve 14 is obliquely downward on the rotating shaft 12B side, and the inclination angle of the lower seal valve 14 with respect to the horizontal plane becomes a predetermined angle Further, when viewed from the extension line of the rotating shafts 12A and 12B, the opening width W2 of the waste passage is 60% or more with respect to the opening width W1 of the lower opening 5b. The predetermined angle is an angle at which waste starts to slide down at a stroke when there is no guide plate 15, and is, for example, 45 to 60 °. The opening width W2 of the waste passage is the minimum value of the distance between the guide plate 15 and the lower seal valve 14. Thereby, the stagnation of the waste between the lower seal valve 14 and the guide plate 15 can be suppressed.

  The waste receiving hopper 4 includes a cylindrical discharge portion 4 a extending in the vertical direction and an annular receiving portion 4 b provided on the discharge portion 4 a, and is disposed on the intermediate hopper 5. The central axis of the discharge part 4a coincides with the central axis CL2 of the intermediate hopper 5. The receiving part 4b is connected to the upper end part of the discharge part 4a and has an inverted frustum shape that gradually spreads upward.

  The waste is transported above the waste receiving hopper 4 by the waste transport bucket 17 and dropped. The receiving unit 4b receives the dropped waste. The lower end part of the discharge part 4 a is opened and closed by the upper seal valve 11 together with the upper opening part 5 a of the intermediate hopper 5. In a state where the lower end portion of the discharge portion 4a is opened, the waste is guided into the discharge portion 4a by the receiving portion 4b, and the waste that has passed through the discharge portion 4a is received in the intermediate hopper 5.

  The auxiliary material charging device 6 includes a tubular auxiliary material chute 6a that projects obliquely upward from the side surface of the intermediate hopper 5, and an auxiliary material hopper 6b that is connected to the tip of the auxiliary material chute 6a and opens upward. ing. A base end portion of the auxiliary material chute 6 a is opened in the intermediate hopper 5. The bottom of the secondary material hopper 6b opens into the secondary material chute 6a. Between the auxiliary material chute 6a and the auxiliary material hopper 6b, an auxiliary material charging valve 6c that opens and closes the bottom of the auxiliary material hopper 6b is provided. In order to charge a plurality of types of secondary materials into the intermediate hopper 5, the waste charging device 2 may include a plurality of secondary material charging devices 6.

  Next, a procedure for charging waste and auxiliary materials into the waste melting furnace 1 will be described. First, in a state where the upper opening 5a is opened by the upper seal valve 11, the waste is transported to the upper side of the waste receiving hopper 4 by the bucket 17 and dropped. The waste is received from the receiving portion 4b into the waste receiving hopper 4 and charged into the intermediate hopper 5 through the upper opening 5a.

  When a predetermined amount of waste is charged into the intermediate hopper 5, the upper seal valve 11 is closed and the auxiliary material charging valve 6 c of the auxiliary material charging device 6 is opened. Then, the auxiliary material such as coke is charged into the intermediate hopper 5 from the auxiliary material hopper 6b through the auxiliary material chute 6a. When a predetermined amount of the auxiliary material is charged into the intermediate hopper 5, the auxiliary material charging valve 6c is closed, and the gas in the intermediate hopper 5 is replaced with an inert gas.

  Next, the lower seal valve 14 is opened with the upper seal valve 11 and the auxiliary material charging valve 6c closed. Thus, when the upper opening 5a is opened, the lower opening 5b is closed, and when the lower opening 5b is opened, the upper opening 5a is closed so that the internal space and the external space of the waste melting furnace 1 are closed. The waste can be charged while shutting off. When the lower seal valve 14 is opened, the guide plate 15 is retracted outside the rotation range of the lower seal valve 14 so as not to hinder the rotation of the lower seal valve 14. Further, the projecting direction P1 of the guide plate 15 is inclined toward the central axis CL1 so that the waste falling with the opening of the lower opening 5b is brought closer to the central axis CL1.

  When the downward rotation angle of the lower seal valve 14 reaches, for example, about 45 to 60 °, the waste G and the secondary material K slide down the slope of the lower seal valve 14 as shown in FIG. start. By sliding down the slope of the lower seal valve 14, the falling speed V of the waste G and the auxiliary material K includes a horizontal component Vx toward the central axis CL1 in addition to the vertical component Vy along the central axis CL1. . The waste that has passed the central axis CL1 is guided to the guide plate 15 and returned to the central axis CL1 side. In this way, the waste is brought closer to the central axis CL1 side by the cooperation of the lower seal valve 14 and the guide plate 15. That is, due to the flow path formed by the lower seal valve 14 and the guide plate 15 in cooperation, the falling direction of the waste is along the central axis CL1.

  If the guide plate 15 is not provided, as shown in FIG. 3, most of the waste G and the auxiliary material K pass through the central axis CL1 while falling. In the vicinity of the inner surface of the side wall 1a, waste is deposited higher in the portion on the opposite side of the lower seal valve 14 with respect to the central axis CL1 than in the vicinity of the central axis CL1 (hereinafter, this portion is referred to as a high deposition portion). HP.) In the vicinity of the inner surface of the side wall 1a, waste is deposited lower in the portion on the lower seal valve 14 side with respect to the central axis CL1 than in the vicinity of the central axis CL1 (hereinafter, this portion is referred to as a low deposition portion LP). .)

  Here, coke and the like are combusted at the bottom of the waste melting furnace 1, and high-temperature furnace gas is generated. As the in-furnace gas rises through the accumulated waste G, the waste G is dried and thermally decomposed. In the high deposition part HP, the rising distance of the in-furnace gas until passing through the waste G is longer than that in the low deposition part LP. Furthermore, since the drop impact at the time of waste charging is concentrated on the high accumulation portion HP, the waste G in the high accumulation portion HP is densified. For this reason, in the high deposition part HP, the ventilation resistance of the gas in a furnace is high compared with the low deposition part LP. For these reasons, the high deposition portion HP is less likely to pass through the furnace gas than the low deposition portion LP, and most of the furnace gas flows to the low deposition portion LP. This makes it difficult for heat to be transferred to the waste G in the high accumulation portion HP, and thus the efficiency of drying or thermal decomposition of the waste G is reduced in the high accumulation portion HP. When the efficiency of drying or thermal decomposition is reduced, the volume of the waste G is difficult to be reduced, and the waste G is likely to stagnate. When the waste G is stagnated, the uneven accumulation of the waste G is further increased. Such a vicious cycle may cause various problems such as a decrease in the amount of waste processing and an increase in the consumption of fuel such as coke.

  On the other hand, according to the waste charging device 2 provided with the guide plate 15, the waste G and the auxiliary material K can be moved toward the central axis CL1 and the falling direction of the waste G can be made to follow the central axis CL1. it can. Furthermore, by rotating the lower seal valve 14 and the guide plate 15, the dropping position of the waste G and the auxiliary material K can be adjusted. Therefore, as shown in FIG. 4, the uneven accumulation of the waste G in the waste melting furnace 1 can be suppressed. Only the guide plate 15 may be rotated to sort the falling direction of the waste G and the auxiliary material K.

  After the charging of the predetermined amount of waste is completed, the lower seal valve 14 is closed, and the charging of the waste G and the auxiliary material K is stopped. At this time, waste may be caught between the lower seal valve 14 and the guide plate 15 and it may be difficult to close the lower seal valve 14. When such a phenomenon occurs, it is effective to incline the guide plate 15 to the opposite side of the central axis CL1 before closing the lower seal valve 14. When the lower seal valve 14 is closed, the furnace gas confined in the intermediate hopper 5 is replaced with an inert gas, air, or the like. By repeating the above steps, the waste is intermittently charged.

  Alternatively, the auxiliary material charging valve 6 c may be opened before the upper seal valve 11 is opened, and the auxiliary material K may be charged into the intermediate hopper 5 before the waste G is charged into the intermediate hopper 5. The upper seal valve 11 and the auxiliary material charging valve 6c may be opened at the same time, and the waste G and the auxiliary material K may be charged into the intermediate hopper 5 simultaneously. Even if only the waste G is charged into the waste melting furnace 1 by charging the waste G without charging the secondary material K into the intermediate hopper 5 and opening the lower seal valve 14. Good.

  Furthermore, only the secondary material K is charged in the intermediate hopper 5 without charging the waste G, and only the secondary material K is charged into the waste melting furnace 1 by opening the lower seal valve 14. May be. For example, by charging only the fuel such as coke into the waste melting furnace 1 without charging the waste G, the temperature inside the furnace can be adjusted, for example, by adjusting the temperature inside the furnace. . FIG. 5 shows a state in which only the auxiliary material K is charged. The secondary material K tends to slide down a gentle slope as compared with the waste G. Further, the auxiliary material K can pass through an opening smaller than the waste G. For this reason, compared with the case where the waste G is charged, when only the auxiliary material K is charged, the inclination angle of the lower seal valve 14 with respect to the horizontal plane is small.

  Even when only the auxiliary material K is charged, by adjusting the inclination angle of the lower seal valve 14 and the guide plate 15 appropriately, the auxiliary material K is brought closer to the central axis CL1 side, and the falling direction of the auxiliary material K is centered. It can be along the axis CL1. Further, by rotating the lower seal valve 14 and the guide plate 15, it is possible to sort the dropping direction of the auxiliary material K. Only the guide plate 15 may be rotated so as to distribute the falling direction of the auxiliary material. In this case, it is possible to eliminate the stagnation of the waste G by inserting a fuel such as coke into a place where the stagnation of the waste G occurs. Thereby, the airflow resistance can be made uniform.

  Then, 2nd Embodiment of the waste charging device which concerns on this invention is described. The waste charging device 2A shown in FIGS. 6 and 7 includes a lock member 21 that supports the tip portion 14a of the lower seal valve 14 in order to more firmly close the lower opening 5b. Thus, it is different from the waste charging device 2. The lock member 21 protrudes from the rotating shaft 12B to the rotating shaft 12A side so as to support the lower seal valve 14 with the lower opening 5b closed, and is positioned below the distal end portion 14a of the lower seal valve 14. doing.

  The lock member 21 is disposed on one end side of the rotating shaft 12B, and a notch 15c that avoids interference with the lock member 21 is formed in the base portion 15b of the guide plate 15. The lock member 21 is fixed to the rotation shaft 12B, rotates together with the rotation shaft 12B, and retracts from the rotation range of the lower seal valve 14. That is, the lock member 21 is driven by the drive device 13B of the rotation shaft 12B, rotates about the rotation shaft 12B, and retracts from the rotation range of the tip portion 14a of the lower seal valve 14.

  By providing the lock member 21, the lower seal valve 14 is firmly supported by the lock member 21 when a load such as a drop impact of waste acts on the lower seal valve 14. Thereby, the lower side opening part 5b can be obstruct | occluded more firmly. Further, since the rotation shaft 12B is used for both the rotation of the lock member 21 and the rotation of the guide plate 15, the structure of the waste charging device 2A can be simplified.

  The protruding direction P3 of the lock member 21 and the protruding direction P1 of the guide plate 15 are different from each other and form an angle θ when viewed from the extended line of the rotating shaft 12B. The angle θ is set as follows. When the lock member 21 supports the tip portion 14a of the lower seal valve 14, the protruding direction P1 of the guide plate 15 is obliquely downward on the rotating shaft 12A side (see FIG. 6). Further, when the projecting direction P1 of the guide plate 15 is vertically downward, the lock member 21 is positioned outside the rotation range of the distal end portion 14a of the lower seal valve 14 (see FIG. 7).

  Since the angle θ is set in this way, the lock member 21 can be reliably disposed under the distal end portion 14 a of the lower seal valve 14 without being obstructed by the guide plate 15. Further, the lower opening 5b can be opened without tilting the guide plate 15 to the opposite side of the central axis CL1. If the guide plate 15 is inclined to the opposite side of the central axis CL1 when the waste starts to fall, it is difficult to bring the waste falling direction to the central axis CL1. Therefore, the uneven accumulation of waste can be more reliably suppressed by opening the lower opening 5b without inclining the guide plate 15 to the opposite side of the central axis CL1.

  The preferred embodiments of the present invention have been described above. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Waste melting furnace, 1a ... Side wall, 2, 2A ... Waste charging device, 5 ... Intermediate hopper, 5a ... Upper opening part, 5b ... Lower opening part, 11 ... Upper seal valve, 12A ... 1st Rotating shaft, 12B ... second rotating shaft, 14 ... lower seal valve, 14a ... tip, 15 ... guide plate, 21 ... lock member, CL1 ... center axis, P1 ... extending direction.

Claims (4)

A waste charging apparatus for charging waste from above into a waste melting furnace having a cylindrical side wall extending along the vertical direction,
An intermediate hopper having an upper opening for receiving waste from above and a lower opening for sending waste downward, and disposed above the waste melting furnace;
An upper seal valve for opening and closing the upper opening;
1st which is arrange | positioned in the periphery of the said lower side opening part so that it may pinch | interpose the said lower side opening part and the center axis line of the said side wall of the said waste melting furnace, and each extends in a horizontal direction so that it may mutually become parallel And a second pivot axis;
Projecting from the first rotation shaft to the second rotation shaft side so as to block the entire area of the lower opening, and rotating downward about the first rotation shaft, the lower side A lower seal valve that opens the opening;
A waste charging apparatus comprising: a guide plate that protrudes downward from the second rotation shaft and rotates around the second rotation shaft to adjust the falling direction of the waste.   The waste charging device according to claim 1, wherein a rotation range of the guide plate is set so that a tip end portion of the guide plate passes through the central axis.   The second seal shaft protrudes from the second pivot shaft toward the first pivot shaft so as to support the tip portion of the lower seal valve, and is positioned below the tip portion of the lower seal valve. The waste charging apparatus according to claim 1, further comprising a lock member that rotates about a rotation axis of the lower seal valve and retracts from a rotation range of a tip portion of the lower seal valve.   When the lock member and the guide plate rotate together, and the lock member supports the tip of the lower seal valve, the protruding direction of the guide plate is obliquely below the first rotation shaft side. The waste charging device according to claim 3, wherein when the extending direction of the guide plate is vertically downward, the lock member is located outside the rotation range of the tip of the lower seal valve.

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