JP4887526B2 - Method and system for quantitative supply of workpieces - Google Patents

Description

  The present invention relates to a quantitative supply method and system for quantitatively supplying an object to be treated to a furnace, and more particularly to a quantitative supply method and system for quantitatively supplying an object to be processed composed of components having a large specific gravity difference to the furnace.

  For example, the state of combustion when an object to be treated such as waste is put into a furnace and burned at a high temperature by, for example, dry distillation treatment or the like greatly varies depending on components contained in the object to be treated and its weight. In particular, in the object to be treated from which the metal content or the like is excluded, since most of the components are combustion components, the weight and the combustion calories are almost correlated, and there is a need to sufficiently manage the supplied weight. Conventionally, various techniques for quantitatively supplying an object to be processed into a furnace have been disclosed.

  For example, Patent Document 1 discloses that a processing object dropped and supplied from a hopper for a processing object to a casing is transferred forward while being stirred by a screw, and is gradually compressed in a taper portion at a front end portion of the casing. A workpiece charging device is described which is charged into a furnace while holding the substrate. This processing object charging apparatus can quantitatively supply the processing object whose constituent components are almost uniformly crushed into the furnace.

JP 2000-193220 A

  However, for example, ASR (Automobile Threader Dust) and the like, such as urethane and resin containing crushed metal, have a large difference in the specific gravity of the constituents, and therefore the agitation. If it does, the component with a higher density and the component with a lower density will separate, and the bulk density will become non-uniform | heterogenous. In this way, even if a workpiece having a non-uniform bulk density is quantitatively supplied in terms of volume, the weight varies. That is, in the workpiece charging apparatus described in Patent Document 1, the bulk density of workpieces such as ASR having a large difference in specific gravity of the constituent components becomes nonuniform due to stirring during conveyance and supply. , It is difficult to quantitatively supply the furnace in terms of weight.

  The present invention has been made in view of the above-described problems, and provides a quantitative supply method and system capable of supplying an object to be processed, which is composed of components having a large specific gravity difference, into a furnace in a substantially quantitative manner in terms of both volume and weight. Its purpose is to provide.

In order to solve the above-described problems, according to the present invention, there is provided a quantitative supply method for supplying a processed object made of shredder dust into a furnace in a fixed quantity without using a circle feeder to stir the processed object. A step of dropping a fixed amount onto the upper surface of the transfer conveyor and stacking on the upper surface of the transfer conveyor, and operating the transfer conveyor each time the weight of the stacked work pieces reaches a predetermined value. A method for quantitatively supplying an object to be processed, comprising a step of dropping an object to be processed from a section and depositing the object to be processed below the conveyor , and a step of supplying the deposited object to be processed into a furnace. Is provided.

In order to solve the above problems, according to the present invention, there is provided a quantitative supply system for quantitatively supplying a processing object made of shredder dust into a furnace, comprising a storage unit for storing the processing object, A circle feeder that discharges and drops the workpieces stored in the storage unit from the outlet without stirring, and the weight of the workpiece to be loaded can be measured under the circle feeder outlet. A transport conveyor equipped with a weight measuring mechanism, wherein the workpieces dropped from the discharge port are loaded on the upper surface, and are operated each time the weight of the loaded workpieces reaches a predetermined value, A transport conveyor for dropping the loaded workpieces from its upper end and a valve that opens to the furnace and opens at a predetermined timing are provided at the lower part so that the dropped workpieces are deposited. The above And having a hopper disposed below the bare, dispensing system of the workpiece is provided.

  According to the present invention, an object to be processed composed of components having a large specific gravity difference can be substantially quantitatively supplied into the furnace in terms of both volume and weight. In addition, the combustion of the furnace can be managed stably.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a configuration diagram of a quantitative supply system 1 for waste such as ASR (automobile threader dust) according to an embodiment of the present invention. A supply unit 3 for supplying waste 2 such as ASR as an object to be processed is arranged upstream of the quantitative supply system 1 shown in FIG. A furnace 4 is disposed for subjecting the waste 2 to be quantitatively supplied by the quantitative supply system 1 to a dry distillation process.

  The supply unit 3 includes a raw material hopper 5 into which the waste 2 is previously charged, a mechanism (not shown) for cutting out the waste 2 from the raw material hopper 5, and a transport for transporting the waste 2 cut out from the raw material hopper 5. Consists of a conveyor 6.

  The quantitative supply system 1 accumulates the waste 2, quantitatively discharges the accumulated waste 2 from the discharge port and drops it, and loads the waste 2 dropped from the quantitative supply mechanism 7 The conveyor 8 is operated every time the weight of the loaded waste 2 reaches a predetermined value and drops the loaded waste 2 from the upper end thereof, and the waste dropped from the conveyor 8 And a hopper 9 on which 2 is deposited.

  For example, a circle feeder described in JP-A-6-255794 may be used as the quantitative supply mechanism 7. FIG. 2A is a perspective view of the circle feeder 7. FIG. 2B is a plan view of the vicinity of the circular bottom surface of the circle feeder 7 as viewed from inside the circle feeder 7. As shown in FIG. 2A, the circle feeder 7 (a) has a configuration in which a hopper 11 is provided on the upper portion of the cylindrical container 10. As shown in FIG. As shown in FIGS. 2A and 2B, the cylindrical container 10 includes two inner rotating bodies 12 and an outer rotating body that rotate around the axis concentric with the circular bottom surface in the same direction along the bottom surface. 13. The inner rotating body 12 is a cross-shaped rotating body in which four flat plates protrude from a shaft portion 14 provided at the center of the circular bottom surface. The outer rotating body 13 is an annular rotating body that rotates along the inner peripheral surface of the cylindrical container 10, and a plurality of short wings 15 that protrude in the radial direction toward the center are equally spaced along the inner peripheral surface. In preparation. The inner rotator 12 and the outer rotator 13 are configured not to impede mutual rotation when rotating in the same direction. 2A and 2B, the circular bottom surface of the cylindrical container 10 is provided with a discharge port 16 for discharging the waste 2 accumulated therein.

  As shown in FIG. 3, the transport conveyor 8 is a conventionally known packet-type conveyor disposed inside the housing 17 so that the transport direction is horizontal. The housing 17 is provided with a supply port 18 through which the waste 2 is supplied at the top, and the bottom is open so that the waste 2 can be discharged. One end of the upper surface of the conveyor 8 is disposed below the supply port 18 so as to receive the waste 2. When receiving the waste 2 from the supply port 18, the transport conveyor 8 is provided with skirt portions 19 on both sides along the longitudinal direction so that the waste 2 does not fall to the side of the transport conveyor 8. Further, the other end of the upper surface of the conveyor 8 is disposed in the vicinity of the opened lower portion of the housing 17 so that the waste 2 can be dropped and discharged.

  The conveyor 8 has rotating bodies 20 and 21, a pair of endless chains 22 and 23 that circulate around the rotating bodies 20 and 21, and both ends connected to the pair of endless chains 22 and 23. The plurality of packets 24 are independent from each other. These rotating bodies 20 and 21 are driven by a driving body (not shown), and the conveyor 8 is operated. The plurality of packets 24 can be loaded with the waste 2 inside each of the packets 24 while keeping the longitudinal direction horizontal, and both ends of the packets 24 protrude so as not to drop the waste 2 from the side. The plurality of packets 24 circulate together with the chains 22 and 23, and when the upper surface of the conveyor 8 is moved upward from one end to the other end, the waste 2 is loaded and conveyed therein, and the other end When the direction is changed from upward to downward, the loaded waste 2 can be cut out, dropped, and discharged.

  The conveyor 8 includes a load cell (not shown) that can detect and measure the weight of the loaded waste 2. The load cell can separately measure the weight of the casing 17, the weight of only the transfer conveyor 8, and the weight of only the waste 2. As a result, the measured weight value is not affected by vibrations of the circle feeder 7 and a supply hopper 18 described later. Further, there is no influence when the air pressure in the supply hopper 9 described later fluctuates.

  A monitoring camera (not shown) is provided above the conveyor 8. As a result, the state of the waste 2 can be monitored and the state of the waste 2 can be grasped visually. For example, if the waste 2 contains a lot of sand, it contains a large amount of non-combustible gravel, so the temperature during combustion in the furnace 4 is expected to drop. Thus, for example, it can be used to adjust the internal temperature of the furnace 4.

  A supply hopper 9 is disposed below the conveyor 8 as shown in FIG. In this embodiment, the supply hopper 9 is configured as an integral type connected to the housing 17 via a bellows-like rubber 25. The supply hopper 9 is provided with a rotary valve 26 that communicates with the furnace 4 and is opened at a predetermined timing. The supply hopper 9 can deposit the waste 2 dropped downward by the conveyor 8 and supply the deposited waste 2 to the furnace 4 through a rotary valve 26 opened at a predetermined timing. It is configured. The rotary valve 26 is a rotary valve that is a conventionally known valve that can be opened and closed by rotating a partition plate. When the rotary valve 26 is opened, the waste 2 in the supply hopper 9 is supplied to the furnace 4 due to the negative pressure inside the furnace 4 and a drop. The opening timing of the rotary valve 26 is controlled by the operation status of the furnace 4 and the input status of the waste 2.

  In the present embodiment, a conventionally known rotary kiln type furnace is used for the furnace 4 as shown in FIG. 1, but other types of furnaces may be used.

  Next, a fixed quantity supply method in the fixed quantity supply system 1 configured as described above will be described. First, in the supply unit 3, the waste 2 is cut out from the raw material hopper 5 in which the waste 2 such as ASR is previously input, transferred to the transport conveyor 6, and transported to the circle feeder 7.

  The conveyed waste 2 is put into the hopper 11 of the circle feeder 7. The charged waste 2 is accumulated in the cylindrical container 10 of the circle feeder 7 and is rotated by the inner rotating body 12 and the outer rotating body 13 in the cylindrical container 10. At this time, since the inner rotating body 12 and the outer rotating body 13 rotate in the same direction, the waste 2 is rotated without stirring. Alternatively, the waste 2 is rotated with minimal agitation. As described above, the waste 2 that is almost kept in the state of being charged and whose bulk density is not uniform is discharged from the discharge port 16 by a predetermined amount by the rotation of the circle feeder 7 in the cylindrical container 10. The This discharge amount can be controlled by the rotation speed of the inner rotary body 12 and the outer rotary body 13, the diameter of the discharge port 16, and the like.

  The waste 2 discharged from the circle feeder 7 through the discharge port 16 is dropped through the supply port 18 and loaded on the upper surface of the transport conveyor 8. The weight of the waste 2 is detected and measured by a load cell provided in the transport conveyor 8 while being loaded on the packet 24 of the transport conveyor 8. At this time, the conveyance conveyor 8 supplied from the supply port 18 can be moved and adjusted so that the waste 2 is not concentrated and stacked at a specific position of the conveyance conveyor 8. Each time the weight of the waste 2 measured by the load cell reaches a predetermined value, the transport conveyor 8 is operated, and the waste 2 loaded by the packet 24 is transported to one end of the transport conveyor 8. Therefore, the upward packet 24 loaded with the waste 2 is directed downward, and the waste 2 is dropped into the lower supply hopper 9 and discharged.

  The waste 2 that has been transported and dropped from the transport conveyor 8 is deposited in the supply hopper 9. The waste 2 accumulated in the supply hopper 9 is quantitatively supplied to the furnace 4 by a predetermined volume by opening a rotary valve 26 provided at a lower portion of the supply hopper 9 at a predetermined timing. As described above, the opening timing may be controlled by the operation status of the furnace 4 and the input status of the waste 2.

  When the input amount of the waste 2 is controlled according to the operation state of the furnace 4, the input amount can be controlled more accurately by rotating the conveyor 8 according to the input amount of the waste 2. Further, by temporarily retaining the waste 2 on the conveyor 8, it is possible to respond to the opening degree of the rotary valve 26. For example, when the rotary valve 26 is opened, the conveyor 8 is stopped so that the waste 2 does not fall. As a result, the input amount is more controlled and unexpected equipment failure is prevented. Further, in the supply hopper 9, if the amount of the waste 2 increases excessively, a bridge or the like is generated and free fall is suppressed, so that it is difficult to throw in the waste 2 according to the opening degree of the rotary valve 26. It becomes. This problem can be avoided by controlling the amount of waste 2 dropped by the conveyor 8.

  In the above embodiment, the bulk density of the waste 2 is made non-uniform by transporting the waste 2 to the furnace 4 with a minimum agitation while maintaining the state at the time of charging. As a result, wastes composed of components having a large specific gravity difference can be supplied almost quantitatively in terms of volume and weight. Further, as described above, the weight measurement of the waste 2 by the load cell is not affected by vibrations or the like by the surrounding circle feeder 7 and the supply hopper 18 and the like, so that the weight can be accurately measured.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, this invention is not limited to the example which concerns. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  In the above-described embodiment, the load cell is used for the measuring device for measuring the weight of the waste 2 loaded on the conveyor 8. However, the electromagnetic force balance method, the tuning fork vibration type, the electronic microbalance type, the string vibration are used. Other weight measuring devices such as a formula, a capacitance method, a magnetostriction method, or a gyro method may be used.

  In the embodiment described above, the valve provided at the lower portion of the supply hopper 9 is a rotary valve, but other valves such as a piston type valve may be used.

  The present invention is useful, for example, when waste such as ASR is quantitatively charged into a furnace.

It is a block diagram explaining the structure of the fixed quantity supply system which concerns on embodiment of this invention. They are the perspective view explaining the circle feeder which concerns on embodiment of this invention, and the top view which looked at the bottom face vicinity from the inside of the circle feeder. It is a perspective view explaining the conveyance conveyor and supply hopper which concern on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Quantity supply system 2 Waste 3 Supply part 4 Furnace 5 Raw material hopper 6,8 Conveyor 7 Circle feeder (quantity supply mechanism)
9 Supply hopper

Claims (2)

A quantitative supply method for supplying a material to be processed made of shredder dust into a furnace.
Using a circle feeder , dropping the object to be treated onto the upper surface of the conveyor by a predetermined amount without stirring, and stacking the workpiece on the upper surface of the conveyor;
A step of operating the transport conveyor each time the weight of the stacked objects to be processed reaches a predetermined value, dropping the objects to be processed from an upper end portion of the conveyor, and depositing them below the conveyor;
And a step of supplying the deposited object to be processed into a furnace . A quantitative supply system for supplying a material to be processed made of shredder dust into a furnace.
A circle feeder that includes a storage unit for storing the processing object, and discharges the processing object stored in the storage unit from the discharge port without stirring;
A conveyor that is disposed below the discharge port of the circle feeder and has a weight measuring mechanism capable of measuring the weight of the stacked processing object, and the processing object dropped from the discharging port is stacked on the upper surface. And a conveyor that operates each time the weight of the loaded workpiece reaches a predetermined value and drops the loaded workpiece from an upper end thereof;
A valve that opens to the furnace at a predetermined timing and is provided at a lower portion, and has a hopper disposed below the conveyor so that the dropped objects are deposited. System for quantitative supply of processed materials.

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