JP2016125789A - Waste supply device and operating method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste supply device that crushes waste by a primary crusher and a secondary crusher and that can secure a space for forming a material seal on the secondary crusher while avoiding an increase in overall vertical size of the device.SOLUTION: The present invention relates to a waste supply device 100, which comprises a primary crusher 20, a conveyor 40, a secondary crusher 80, and a seal part 70. The conveyor 40 has a start end and a tail end and is so shaped as to have the start end below the primary crusher 20 and the tail end above the start end, the seal part 70 is so shaped as to extend vertically and also surround a fall passage for waste from the tail end of the conveyor 40 to below, and the secondary crusher 80 is connected to a lower end of the seal part 70 to crush the waste falling through the fall passage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waste supply device and an operation method thereof.

  2. Description of the Related Art Conventionally, a waste supply apparatus that supplies waste to a waste treatment facility (fluidized bed furnace or the like) that processes waste is known. Such a waste supply apparatus generally supplies waste to a waste treatment facility after crushing the waste to a predetermined crushing particle size. An apparatus for crushing waste a plurality of times to obtain a predetermined crushing particle size is also known.

  For example, in Patent Document 1, a conveyor that conveys waste, a multi-shaft primary crusher that crushes the waste conveyed by the conveyor, and further crush the waste crushed by the primary crusher. A waste supply device including a rotating secondary crusher is disclosed. The primary crusher is arrange | positioned under the conveyor, receives the waste which fell from the conveyor, crushes, and drops the waste after crushing. The secondary crusher is disposed below the primary crusher, receives and crushes the waste dropped from the primary crusher, and drops the crushed waste downward. That is, in this waste supply device, the conveyor, the primary crusher, and the secondary crusher are arranged in this order from the top to the bottom with a predetermined interval.

  When this waste supply device is used to supply waste to the fluidized bed furnace, a sealing means is provided on the secondary crusher to suppress the inflow of air from the waste supply device to the fluidized bed furnace. It is often done. As a sealing means, a so-called material seal, that is, a seal formed by waste deposited on a secondary crusher is widely known.

Japanese Patent Laid-Open No. 10-034007

  When waste is supplied to a fluidized bed furnace with a waste supply apparatus as described in Patent Document 1, the size of the entire apparatus in the vertical direction is avoided and the fluidized bed furnace is moved onto the secondary crusher. It is difficult to form a sufficient material seal for suppressing the ingress of air. Specifically, in the waste supply apparatus, since the secondary crusher is connected immediately below the primary crusher, the vertical distance between the primary crusher and the secondary crusher, that is, the secondary crusher. There is not enough space to form a material seal on the crusher. Therefore, it is conceivable to secure a space for forming a material seal on the secondary crusher by increasing the vertical distance between the primary crusher and the secondary crusher. The vertical dimension of the entire device is significantly increased.

  The object of the present invention is to provide a material on the secondary crusher while avoiding an increase in the vertical dimension of the whole device in a waste supply device that crushes waste with a primary crusher and a secondary crusher. It is to provide a device capable of securing a space for forming a seal.

  As a means for solving the above-mentioned problems, the present invention is a waste supply apparatus for supplying the waste to a waste treatment facility for processing the waste, the waste being crushed and after being crushed A primary crusher that drops the waste downward, a conveyor that is disposed downstream of the primary crusher, conveys the waste crushed by the primary crusher, and is conveyed by the conveyor A secondary crusher for further crushing the waste, and a seal portion for sealing the downstream side of the secondary crusher from the upstream side of the secondary crusher, wherein the conveyor is upstream in the conveying direction. A start end portion that is a side end portion and a terminal end portion that is an end portion on the downstream side in the transport direction, wherein the start end portion is located below the primary crusher and the terminal end portion is the start end The seal portion has a shape located above the portion. The secondary crusher is connected to the lower end portion of the seal portion, and has a shape that extends in the vertical direction and surrounds the waste passage of the waste downward from the end portion of the conveyor. A waste supply device that crushes the waste that has fallen through is provided.

  In the present invention, the primary crusher, the conveyor, and the secondary crusher are arranged in this order, and the start end of the conveyor is located below the primary crusher, and the end of the conveyor is from the start end. Is also located above, and a secondary crusher is disposed below the end portion. In other words, the waste crushing path from the primary crusher to the conveyor and from the conveyor to the secondary crusher Since a part of the waste fall passage overlaps in the horizontal direction, the vertical direction of the seal portion disposed between the conveyor and the secondary crusher is avoided while avoiding an increase in the vertical dimension of the entire apparatus. Dimensions (space for forming a material seal on the secondary crusher) can be ensured. Furthermore, the fact that a sufficient material seal can be formed on the secondary crusher enables the installation of a sealing device or the like between the conveyor and the secondary crusher to be omitted. In addition, since the conveyor has a function of storing waste in addition to a function of conveying waste, the secondary crusher is arranged by arranging the conveyor between the primary crusher and the secondary crusher. Stable supply of waste to

  In this case, it is preferable to further include a conveyor control unit that controls the conveyance speed of the conveyor so that the amount of the accumulated waste in the seal unit and on the secondary crusher is equal to or higher than a lower limit value.

  If it does in this way, a material seal will be formed effectively on the secondary crusher in a seal part. Further, since a predetermined amount of waste is secured on the secondary crusher, the waste is supplied to the secondary crusher at a predetermined pressure, so that the crushing particle size of the waste in the secondary crusher is Make uniform.

  Furthermore, in this case, the conveyor control unit is configured so that the amount of waste accumulated in the seal unit and on the secondary crusher is not less than the lower limit and not more than the upper limit greater than the lower limit. It is preferable to control the conveyance speed of the conveyor.

  If it does in this way, in addition to formation of an effective material seal and equalization of the crushing particle size in a secondary crusher, the approach (backflow) of the waste from the upper part of a seal part into a conveyor is controlled. Furthermore, the effect of overload on the secondary crusher is also suppressed.

  Specifically, the detector further includes a detector capable of detecting the amount of waste accumulated in the seal unit and on the secondary crusher, and the conveyor control unit has a detection value of the detector equal to or lower than the lower limit value. In some cases, it is preferable to increase the conveying speed of the conveyor and decrease the conveying speed of the conveyor when the detection value of the detector is equal to or higher than the upper limit value.

  If it does in this way, said effect will be acquired with the simple structure of adjusting the conveyance speed of a conveyor based on the detected value of a detector.

  Moreover, in this invention, it is preferable to further provide the primary crusher control part which controls the rotation speed of the said primary crusher so that the accumulation amount of the said waste on the said conveyor may be settled in a fixed range.

  In this way, since a certain amount of waste is secured on the conveyor, the amount of waste supplied from the conveyor to the secondary crusher located downstream of the conveyor (necessary for forming the material seal) Appropriate amount of waste).

  Specifically, the detector further includes another detector capable of detecting the amount of waste accumulated on the conveyor, and the primary crusher control unit has a detection value of the other detector equal to or lower than the lower limit value. In this case, it is preferable to increase the rotation speed of the primary crusher and decrease the rotation speed of the primary crusher when the detection value of the other detector is equal to or higher than the upper limit value.

  If it does in this way, said effect will be acquired with the simple structure of adjusting the rotation speed of a primary crusher based on the detected value of another detector.

  Further, the present invention is a method for operating a waste supply apparatus that supplies the waste to a waste treatment facility that processes the waste, and the waste supply apparatus is configured to crush the waste and A primary crusher that drops the waste downward, a conveyor that is disposed downstream of the primary crusher, conveys the waste crushed by the primary crusher, and is conveyed by the conveyor A secondary crusher for further crushing the waste, and a seal portion for sealing the downstream side of the secondary crusher from the upstream side of the secondary crusher, wherein the conveyor is upstream in the conveying direction. A start end portion that is a side end portion and a terminal end portion that is an end portion on the downstream side in the transport direction, wherein the start end portion is located below the primary crusher and the terminal end portion is the start end The seal portion has a shape located above the portion. The secondary crusher is connected to the lower end portion of the seal portion, and has a shape that extends in the vertical direction and surrounds the waste passage of the waste downward from the end portion of the conveyor. A conveying step of controlling the conveying speed of the conveyor so that the amount of accumulated waste in the seal portion and on the secondary crusher is equal to or higher than a lower limit value using a material that crushes the waste that has fallen through A method for operating a waste supply apparatus is provided.

  In this method, a material seal is effectively formed on the secondary crusher in the seal portion. Furthermore, since a predetermined amount of waste is secured on the secondary crusher, the waste is supplied to the secondary crusher at a predetermined pressure. Uniformity and quantitative supply of crushed material into the furnace can be performed.

  Moreover, in the said conveyance process, the conveyance of the said conveyor is carried out so that the accumulation amount of the said waste in the said seal part and on the said secondary crusher may become below the upper limit larger than the said lower limit and more than the said lower limit. It is preferable to control the speed.

  Specifically, as the waste supply device, a device that further includes a detector capable of detecting the amount of waste accumulated in the seal portion and on the secondary crusher is used. It is preferable that when the detected value of the container is equal to or lower than the lower limit value, the conveying speed of the conveyor is increased, and when the detected value of the detector is equal to or higher than the upper limit value, the conveying speed of the conveyor is decreased.

  In this case, it is preferable to further include a primary crushing step for controlling the number of revolutions of the primary crusher so that the amount of waste accumulated on the conveyor falls within a certain range.

  Specifically, as the waste supply device, a device further provided with another detector capable of detecting the amount of accumulated waste on the conveyor is used, and in the primary crushing step, the other detector When the detected value is less than or equal to the lower limit value, the rotational speed of the primary crusher is increased, and when the detected value of the other detector is greater than or equal to the upper limit value, the rotational speed of the primary crusher is increased. It is preferable to lower.

  As described above, according to the present invention, in the waste supply device for crushing waste with the primary crusher and the secondary crusher, the secondary size can be avoided while avoiding an increase in the vertical dimension of the entire device. It becomes possible to provide what can ensure the space for forming a material seal on a crusher.

It is a figure showing the outline of the waste disposal system of one embodiment of the present invention. It is a top view of a primary crusher.

  A waste treatment system according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the waste treatment system includes a waste supply apparatus 100, a fluidized bed furnace 200, a combustion chamber 300, a boiler 400, an exhaust gas treatment unit 500, and a chimney 600. .

  The waste supply device 100 is a device that crushes the waste W and supplies the waste W to the fluidized bed furnace 200. Details of the waste supply apparatus 100 will be described later.

  The fluidized bed furnace 200 is a furnace that takes out gas from the waste W by heating the waste W in the fluidized bed 220 formed by the fluidized medium flowing in the furnace body 210. The fluidized bed furnace 200 constitutes a part of the waste treatment facility.

  The combustion chamber 300 is a facility for burning the gas generated in the fluidized bed furnace 200. Exhaust gas generated in the combustion chamber 300 flows into the boiler 400.

  The boiler 400 is a facility for extracting power (electric power, etc.) from the exhaust gas by bringing the exhaust gas discharged from the combustion chamber 300 into contact with a heat exchanger or the like. The exhaust gas discharged from the boiler 400 is appropriately processed by the exhaust gas processing unit 500 and then released from the chimney 600 to the atmosphere.

  Next, the waste supply apparatus 100 will be described in detail.

  The waste supply apparatus 100 includes a primary hopper 10, a primary crusher 20, a secondary hopper 30, a conveyor 40, a seal unit 70, a secondary crusher 80, and a primary crusher control unit 90. , And a conveyor control unit 95.

  The primary hopper 10 stores the waste W input from above and drops the waste W downward.

  The primary crusher 20 is connected to the lower end of the primary hopper 10. The primary crusher 20 crushes the waste W that has fallen from the primary hopper 10 while rotating around a specific rotation center axis. In the present embodiment, a so-called biaxial crusher is employed as the primary crusher 20. Specifically, the primary crusher 20 has the 1st crushing part 21, the 2nd crushing part 22, the housing | casing 24, and the crushing part drive part 26, as FIG. 2 shows.

  The 1st crushing part 21 has the 1st rotating shaft 21a rotated around the 1st rotation central axis O1, and the crushing blade 21b provided around the 1st rotating shaft 21a. The first rotating shaft 21a is arranged in a posture that is parallel to the horizontal.

  The 2nd crushing part 22 has the 2nd rotating shaft 22a rotated around the 2nd rotation central axis O2, and the crushing blade 22b provided in the circumference | surroundings of the 2nd rotating shaft 22a. The second rotating shaft 22a is disposed in a position parallel to the first rotating shaft 21a and spaced apart from the first rotating shaft 21a in the horizontal direction.

  The casing 24 has a substantially rectangular tube shape that opens up and down, and accommodates both crushing portions 21 and 22 inside thereof. The upper end portion of the housing 24 is connected to the lower end portion of the primary hopper 10.

  The crushing part drive unit 26 drives the rotary shafts 21a and 22a so that the rotary shafts 21a and 22a rotate in opposite directions and inward. The crushing part drive part 26 has the 1st gearwheel 27a and the 2nd gearwheel 27b connected to each rotating shaft 21a, 22a, and the motor 28 for primary crushers which rotationally drives these gearwheels 27a, 27b. The number of teeth of each gear 27a, 27b is appropriately adjusted. In the present embodiment, the primary crusher motor 28 is connected to the first gear 27a. According to the increase / decrease of the rotation speed of the motor 28 for the primary crusher, the amount of waste W to be crushed by the crushing units 21 and 22 (discarded from the primary crusher 20 to the secondary hopper 30 and the conveyor 40) The supply amount of the object W) increases or decreases. In FIG. 1, the gears 27a and 27b are not shown.

  The secondary hopper 30 is disposed below the primary crusher 20. The secondary hopper 30 stores the waste W crushed by the primary crusher 20 and drops the waste W downward.

  The conveyor 40 is disposed on the downstream side of the secondary hopper 30. The conveyor 40 includes a conveyor body 50 that transports the waste W, a conveyor motor 58 that drives the conveyor body 50, and a case 60 that houses the conveyor body 50.

  The conveyor main body 50 conveys the waste W dropped from the primary crusher 20 and the secondary hopper 30 upward. Specifically, the conveyor body 50 includes a transport body 52, a driving roller 55, and a driven roller 56.

  The transport body 52 includes a plurality of rectangular aprons 53 arranged in the transport direction, and a plurality of support posts 54 erected on each apron 53. Note that a chain (not shown) is connected to the plurality of aprons 53, and this chain is wound around the driving roller 55 and the driven roller 56. The plurality of support columns 54 are arranged so as to be intermittently arranged along the conveying direction and intermittently arranged along the width direction (direction orthogonal to the conveying direction).

  The driving roller 55 is provided at a terminal end that is an end on the downstream side in the transport direction. The driven roller 56 is provided at the start end that is the upstream end in the transport direction. The driven roller 56 (starting end portion of the conveyance body 52) is disposed below the secondary hopper 30. The driving roller 55 (the end portion of the transport body 52) is disposed at a position higher than the driven roller 56 and higher than the charging port 212 of the fluidized bed furnace 200.

  In the present embodiment, the transport body 52 is formed in a shape that receives the waste W that has dropped from the secondary hopper 30 and transports the waste W in the horizontal direction and then transports it obliquely upward. That is, the conveyor main body 50 has a shape having a horizontal conveyance portion 52a that conveys the waste W in the horizontal direction and an inclined conveyance portion 52b that conveys the waste W obliquely upward from the downstream end of the horizontal conveyance portion 52a. Is formed.

  The conveyor motor 58 is connected to the driving roller 55 and drives the driving roller 55. The conveyor motor 58 gives a driving force to the driving roller 55 so that the driving roller 55 rotates clockwise in FIG. Thereby, the conveyance body 52 is driven in the conveyance direction.

  The case 60 has a horizontal accommodation portion 62 that accommodates the horizontal conveyance portion 52a, and an inclined accommodation portion 64 that accommodates the inclined conveyance portion 52b.

  The horizontal accommodating part 62 has an opening for dropping the waste W from the secondary hopper 30 onto the horizontal conveying part 52a, and has a shape that covers the periphery of the horizontal conveying part 52a except for the opening. The horizontal accommodating part 62 has the upper wall 63 located in the upper part of the boundary 52c of the horizontal conveyance part 52a and the inclination conveyance part 52b. The upper wall 63 is formed in a flat plate shape and is disposed in a posture that is parallel to the horizontal.

  The inclined accommodating part 64 is connected to the downstream end of the horizontal accommodating part 62, and has a shape that covers the entire circumference of the inclined conveying part 52b.

  The seal portion 70 is connected to an end portion of the conveyor 40 on the downstream side of the case 60. The seal part 70 is a part for suppressing the inflow of air from the conveyor 40 to the fluidized bed furnace 200. The seal part 70 has a shape that surrounds a drop passage that allows the waste W to drop downward from the downstream end of the conveyor 40. Specifically, the seal part 70 is configured by a pipe that extends long vertically downward from the downstream end of the case 60 and surrounds the drop passage. As shown in FIG. 1, the waste W is stacked in the seal portion 70, so that a so-called material seal is formed in the seal portion 70, thereby suppressing the inflow of air from the conveyor 40 to the fluidized bed furnace 200. Is done.

  The secondary crusher 80 is connected to the lower end part of the seal part 70. The shape of the secondary crusher 80 is basically the same as that of the primary crusher 20, and the first crushing portion 81, the second crushing portion 82, the housing 84, and the secondary crusher motor 88. And a crushing part driving part (not shown). The upper end portion of the housing 84 is connected to the lower end portion of the seal portion 70. The crushing particle size of the secondary crusher 80 is set to be the same as or smaller than the crushing flow path of the primary crusher 20.

  In this embodiment, the secondary crusher control part 98 which controls the rotation speed of the motor 88 for secondary crushers is provided. The secondary crusher control unit 98 controls the rotation speed of the secondary crusher motor 88 (waste material) so that the flow rate of steam generated by heat exchange with exhaust gas in the heat exchanger of the boiler 400 is within a predetermined range. The amount of waste W supplied from the supply apparatus 100 to the fluidized bed furnace 200 is controlled. The flow rate of the steam is detected by a flow meter 410 provided in the boiler 400. The boiler 400 may be omitted. In this case, the secondary crusher control unit 98 controls the rotation speed of the secondary crusher motor 88 so that the temperature of the combustion chamber 300 or the temperature of the exhaust gas discharged from the combustion chamber 300 falls within a predetermined range. To do.

  The primary crusher control unit 90 controls the number of rotations of the primary crusher 20 (the number of rotations of the motor for primary crusher 28). Specifically, the primary crusher control unit 90 increases or decreases the number of rotations of the primary crusher motor 28 so that the amount of waste W accumulated in the secondary hopper 30 falls within a certain range. The amount of waste W accumulated in the secondary hopper 30 is detected by a detector 91 provided in the secondary hopper 30. In the present embodiment, the detector 91 is disposed above the first level sensor disposed above the horizontal conveyance unit 52a, the second level sensor disposed above the first level sensor, and the second level sensor. A third level sensor. The first level sensor is disposed at a position corresponding to the lower limit value in the certain range, and the third level sensor is disposed at a position corresponding to the upper limit value in the certain range. The level sensor may be a non-contact type sensor (such as an optical sensor having a light emitting element and a light receiving element) or a contact type sensor.

  When the output (detection value) of the detector 91 includes the detection signal of the third level sensor (the primary crusher control unit 90) (horizontal conveyance unit 52a up to a position corresponding to the upper limit value in the certain range). When the waste W is accumulated on the top), the rotation speed of the primary crusher motor 28 is decreased (for example, 20%) in order to reduce the supply amount of the waste W to the secondary hopper 30 or the conveyor 40. And). In the present embodiment, when the output of the detector 91 still includes the detection signal of the third level sensor even after a predetermined time has elapsed after the rotation speed of the motor 28 for the primary crusher is lowered, the primary crusher The control unit 90 performs an operation to stop the primary crusher motor 28. In this operation, the primary crusher motor 28 is not immediately stopped (the rotation speed is set to 0%), but the rotation speed of the primary crusher motor 28 is gradually approached to 0%. Are preferred.

  The primary crusher control unit 90 rotates the primary crusher motor 28 when the output of the detector 91 does not include the detection signal of the third level sensor and does not include the detection signal of the second level sensor. The number is a steady value (for example, 50%).

  When the output of the detector 91 does not include the detection signal of the second level sensor and does not include the detection signal of the first level sensor, the primary crusher control unit 90 supplies the waste W to the conveyor 40. In order to increase the amount, the rotation speed of the primary crusher motor 28 is increased (for example, 80%). In this embodiment, after increasing the number of revolutions of the primary crusher motor 28, the output of the detector 91 still does not include the detection signal of the second level sensor even after a predetermined time has elapsed, or the detector When the output of 91 does not include the detection signal of the first level sensor, in order to further increase the supply amount of the waste W to the conveyor 40, the rotation speed of the primary crusher motor 28 is further increased (for example, 100 %).

  In addition, the primary crusher control unit 90 reduces the rotation speed of the primary crusher motor 28 when the driving load of the conveyor body 50 reaches the reference load regardless of the output of the detector 91 (for example, 20%). In the present embodiment, the current value A of the conveyor motor 58 is adopted as an index of the driving load. That is, the primary crusher control unit 90 determines that the driving load has reached the reference load when the current value A of the conveyor motor 58 exceeds the specified value A0, and the primary crusher motor 28 Reduce the speed. Specifically, when the load acting on the conveyor main body 50 due to the accumulation of the waste W on the conveyor main body 50 increases, the load torque of the conveyor motor 58 increases, thereby driving the conveyor motor 58. The current value required for the current also increases. For this reason, when the current value A of the conveyor motor 58 exceeds the specified value A0, it can be determined that the drive load has reached the reference load. The current value A of the conveyor motor 58 is detected by an ammeter 92 connected to the conveyor motor 58.

  The conveyor control unit 95 is configured so that the accumulation amount of the waste W in the seal unit 70 and on the secondary crusher 80 is within a range (reference range) that is greater than or equal to the lower limit value and less than or equal to the upper limit value. In addition, the number of rotations of the conveyor motor 58 (the amount of waste W supplied from the conveyor main body 50 to the seal unit 70) is controlled. The amount of waste W deposited in the seal unit 70 and on the secondary crusher 80 is detected by a detector 96 provided in the lower part of the seal unit 70 (above the secondary crusher 80). In the present embodiment, the detector 96 includes a first level sensor disposed at a lower portion (above the secondary crusher 80) in the seal portion 70, and a second level sensor disposed above the first level sensor. And a third level sensor disposed above the second level sensor and below the upper end of the seal portion 70. The first level sensor is disposed at a position corresponding to the lower limit value, and the third level sensor is disposed at a position corresponding to the upper limit value.

  When the output of the detector 96 includes the detection signal of the third level sensor (when the waste W has accumulated up to a position corresponding to the upper limit value in the reference range), the conveyor control unit 95 In order to reduce the amount of waste W supplied to the section 70, the rotational speed of the conveyor motor 58 is reduced (for example, 20%).

  If the output of the detector 96 does not include the detection signal of the third level sensor and does not include the detection signal of the second level sensor, the conveyor control unit 95 sets the rotation speed of the conveyor motor 58 to a steady value (for example, , 50%).

  If the output of the detector 96 does not include the detection signal of the second level sensor and does not include the detection signal of the first level sensor, the conveyor control unit 95 determines the supply amount of the waste W to the seal unit 70. In order to increase, the rotation speed of the conveyor motor 58 is increased (for example, 80%). In this embodiment, after increasing the number of rotations of the conveyor motor 58, the output of the detector 96 still does not include the detection signal of the second level sensor even after a predetermined time has elapsed, or the output of the detector 96 Does not include the detection signal of the first level sensor, in order to further increase the supply amount of the waste W to the seal portion 70 (in order to form a sufficient material seal), the number of rotations of the conveyor motor 58 is set. Further increase (for example, 100%).

  Next, the operation of the waste supply apparatus 100 will be described.

  First, the waste W is thrown into the primary hopper 10. This waste W is sent to the primary crusher 20 and is crushed by the primary crusher 20. The waste W crushed by the primary crusher 20 falls and is stored in the secondary hopper 30.

  The waste W deposited in the secondary hopper 30 and cut out by the conveyor 40 is conveyed by the horizontal conveyance unit 52a and then obliquely upward by the inclined conveyance unit 52b, and is disposed downstream of the inclined conveyance unit 52b. It falls from the end part (terminal part) and accumulates in the seal part 70 (on the secondary crusher 80). Thereby, a material seal is formed on the secondary crusher 80. That is, in this embodiment, the primary crusher 20, the conveyor 40, and the secondary crusher 80 are arrange | positioned along with this order, and the start end part of the conveyor 40 is located under the primary crusher 20, Since the end portion of the conveyor 40 is located above the start end portion, and the secondary crusher 80 is disposed below the end portion, in other words, from the primary crusher 20 to the conveyor 40. Since a part of the waste W falling path and the part of the waste W falling path from the conveyor 40 to the secondary crusher 80 overlap in the horizontal direction, it is possible to avoid the increase in the size of the entire apparatus in the vertical direction, and the seal portion A vertical dimension of 70 (a space for forming a material seal on the secondary crusher 80) can be secured. Furthermore, the fact that a sufficient material seal can be formed on the secondary crusher 80 enables omission of installation of a sealing device or the like between the conveyor 40 and the secondary crusher 80.

  Here, during the transport of the waste W on the conveyor 40, the waste W transported to the inclined transport section 52b is a part thereof (exposed from the upper end of each column 54 and not supported by the column 54). ) May fall toward the horizontal conveyance unit 52a in the middle of conveyance, while the horizontal conveyance unit 52a continues to convey the waste W that has fallen from the primary crusher 20 toward the inclined conveyance unit 52b. Waste W is likely to accumulate on the horizontal conveyance unit 52a or in the vicinity of the boundary 52c between the horizontal conveyance unit 52a and the inclined conveyance unit 52b. In other words, the conveyor main body 50 of the present embodiment has a function of quantitatively transporting the waste W by the inclined transport unit 52b and a function of storing the waste W by the horizontal transport unit 52a.

  In the present embodiment, the primary crusher control unit 90 causes the primary crusher 20 so that the detection value of the detector 91 (the amount of waste W deposited on the horizontal transport unit 52a) falls within a certain range. The number of rotations (the amount of waste W supplied from the primary crusher 20 to the conveyor 40) is controlled, so that a certain amount of waste W is deposited on the transport body 52. Therefore, the supply amount of the waste W from the conveyor 40 to the secondary crusher 80 located on the downstream side of the conveyor 40 (the amount of the waste W necessary for forming the material seal) is appropriately ensured.

  In this embodiment, the conveyor control unit 95 controls the conveyance speed of the conveyor 40 (the number of rotations of the conveyor motor 58) so that the amount of waste W accumulated in the seal unit 70 is equal to or greater than the lower limit. The Therefore, a material seal is effectively formed on the secondary crusher 80 in the seal portion 70. In addition, since a predetermined amount of waste W is secured on the secondary crusher 80, the waste W is supplied to the secondary crusher 80 at a predetermined pressure. The crushing particle size of the object W is made uniform. Furthermore, the conveyor control part 95 controls the conveyance speed of the said conveyor so that the accumulation amount of the waste W in the seal | sticker part 70 may become below an upper limit. For this reason, the approach (backflow) of the waste W from the upper part of the seal | sticker part 70 in the conveyor 40 is suppressed, and also the effect | action of the overload to the secondary crusher 80 is also suppressed. In the present embodiment, the above effect can be obtained with a simple configuration in which the rotation speed of the conveyor motor 58 is adjusted based on the detection value of the detector 96.

  And the waste W crushed with the secondary crusher 80 is supplied to the fluidized bed furnace 200, and is suitably processed with the equipment after the fluidized bed furnace 200 concerned.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  The shape of the conveyor body 50 is not limited to the shape of the above-described embodiment as long as the end portion is positioned higher than the start end portion of the conveyor body 50. For example, the shape of the conveyor body 50 may be a shape that gradually goes upward as it goes from the start end to the end.

  Moreover, the primary crusher 20 and the secondary crusher 80 are not restricted to the biaxial crusher illustrated by the said embodiment. For example, a uniaxial crusher or a rotary crusher may be used as each crusher.

  The detector 96 is not limited to having three level sensors. For example, the detector 96 may have two level sensors. In this case, the conveyor control unit 95 increases the number of rotations of the conveyor motor 58 when the output of the detector does not include the detection signal of the level sensor disposed below the two level sensors. When the output includes the detection signal of the level sensor disposed above the two level sensors, an operation of decreasing the rotation speed of the conveyor motor 58 may be performed.

DESCRIPTION OF SYMBOLS 10 Primary hopper 20 Primary crusher 28 Primary crusher motor 30 Secondary hopper 40 Conveyor 50 Conveyor body 52a Horizontal conveyance part 52b Inclination conveyance part 58 Conveyor motor 60 Case 70 Seal part 80 Secondary crusher 90 Primary Crusher control unit 91 Detector 92 Ammeter 95 Conveyor control unit 96 Detector 100 Waste supply device 200 Fluidized bed furnace 300 Combustion chamber 400 Boiler 500 Exhaust gas treatment unit 600 Chimney W Waste

Claims (11)

A waste supply device that supplies the waste to a waste treatment facility that processes the waste,
A primary crusher for crushing the waste and dropping the crushed waste downward;
A conveyor that is disposed on the downstream side of the primary crusher and conveys the waste crushed by the primary crusher;
A secondary crusher for further crushing the waste conveyed by the conveyor;
A seal part for sealing the downstream side of the secondary crusher from the upstream side of the secondary crusher,
The conveyor has a start end that is an upstream end in the transport direction and a terminal end that is a downstream end in the transport direction, and the start end is below the primary crusher. And has a shape in which the terminal portion is positioned above the starting end portion,
The seal portion has a shape extending in the vertical direction and surrounding the waste falling path downward from the end portion of the conveyor,
The secondary crusher is connected to a lower end portion of the seal portion, and is a waste supply device that crushes the waste dropped through the dropping passage. The waste supply apparatus according to claim 1,
A waste supply apparatus, further comprising a conveyor control unit that controls a conveyance speed of the conveyor so that an accumulation amount of the waste on the secondary crusher is equal to or higher than a lower limit value in the seal unit. The waste supply apparatus according to claim 2, wherein
The conveyor control unit is configured to convey the conveyor so that the amount of waste accumulated in the seal unit and on the secondary crusher is not less than the lower limit and not more than an upper limit greater than the lower limit. Controlling the waste supply device. The waste supply apparatus according to claim 3, wherein
A detector capable of detecting the amount of waste accumulated in the seal part and on the secondary crusher;
The conveyor control unit increases the conveyance speed of the conveyor when the detection value of the detector is equal to or lower than the lower limit value, and conveys the conveyor when the detection value of the detector is equal to or higher than the upper limit value. Waste supply device that reduces speed. The waste supply apparatus according to claim 4, wherein
The waste supply apparatus further comprising a primary crusher control unit that controls the number of revolutions of the primary crusher so that the amount of the waste accumulated on the conveyor falls within a certain range. The waste supply apparatus according to claim 5,
Further comprising another detector capable of detecting the amount of waste deposited on the conveyor,
The primary crusher control unit increases the rotation speed of the primary crusher when the detection value of the other detector is equal to or lower than the lower limit value, and the detection value of the other detector is the upper limit value. A waste supply device that reduces the rotational speed of the primary crusher when the value is equal to or greater than the value. An operation method of a waste supply apparatus that supplies the waste to a waste treatment facility that processes the waste,
As the waste supply device,
A primary crusher for crushing the waste and dropping the crushed waste downward;
A conveyor that is disposed on the downstream side of the primary crusher and conveys the waste crushed by the primary crusher;
A secondary crusher for further crushing the waste conveyed by the conveyor;
A seal part for sealing the downstream side of the secondary crusher from the upstream side of the secondary crusher,
The conveyor has a start end that is an upstream end in the transport direction and a terminal end that is a downstream end in the transport direction, and the start end is below the primary crusher. And has a shape in which the terminal portion is positioned above the starting end portion,
The seal portion has a shape extending in the vertical direction and surrounding the waste falling path downward from the end portion of the conveyor,
The secondary crusher is connected to a lower end portion of the seal part, and uses a crushing waste that has fallen through the dropping passage,
A method for operating a waste supply apparatus, comprising a transport step for controlling a transport speed of the conveyor so that the amount of the waste deposited on the secondary crusher is equal to or higher than a lower limit value in the seal portion. In the operation method of the waste supply apparatus according to claim 7,
In the conveyance step, the conveyance speed of the conveyor is set so that the amount of the waste accumulated in the seal portion and on the secondary crusher is equal to or greater than the lower limit value and equal to or less than an upper limit value greater than the lower limit value. The operation method of the waste supply apparatus to be controlled. The operation method of the waste supply apparatus according to claim 8,
As the waste supply device, using a device further equipped with a detector capable of detecting the amount of waste accumulated in the seal part and on the secondary crusher,
In the transporting step, when the detection value of the detector is less than or equal to the lower limit value, the transport speed of the conveyor is increased, and when the detection value of the detector is greater than or equal to the upper limit value, the transport speed of the conveyor To operate the waste supply device. In the operation method of the waste supply apparatus according to claim 9,
An operation method for a waste supply apparatus, further comprising a primary crushing step of controlling a rotation speed of the primary crusher so that an accumulation amount of the waste on the conveyor falls within a certain range. The operation method of the waste supply apparatus according to claim 10,
Utilizing the waste supply device further comprising another detector capable of detecting the amount of waste deposited on the conveyor,
In the primary crushing step, when the detection value of the other detector is equal to or lower than the lower limit value, the rotational speed of the primary crusher is increased, and the detection value of the other detector is equal to or higher than the upper limit value. The operation method of the waste supply apparatus which lowers the rotation speed of the said primary crusher when it is.

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