JP2005145631A - Method for operating pipe conveyor, pipe conveyor device, and working equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a halt of a pipe conveyor due to an overload, to convey an object to be conveyed reliably, and to work on a workpiece stably. <P>SOLUTION: Pipe conveyors 16, 25 are provided with a conveyance pipe 7, blades 8 moving in the pipe 7 with a shape nearly equal to or slightly smaller than the inner diameter of the pipe 7, and an endless link chain 9 connecting a plurality of blades 8 at proper intervals while being circulated and driven by driving sources 18, 26. An object to be conveyed thrown in the pipe 7 by the drive of the endless link chain 9 is conveyed by the pressure of the blades. The driving sources 18, 26 are configured to be operated intermittently by repeating regular operation (conveyance direction) and halts or reverse, and thus the endless link chain 9 is moved intermittently. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  This invention is an operation of a pipe conveyor suitable for transporting sludge, soil, crushed materials (wood pieces, paper pieces, plastic strips, rubber scraps, etc.), or carbides obtained by pyrolyzing these materials. The present invention relates to a method and a pipe conveyor apparatus, and also relates to a processing facility to which the pipe conveyor apparatus is applied, using various substances as raw materials, and removing organic components by drying and pyrolysis to reduce the volume and reduce the volume.

Conventionally, various organic substances, various sludges, soil and earth and sand, which are raw materials for processing, are pyrolyzed in a reducing atmosphere by indirect heating to process drying, carbonization, ashing, purification, etc. ing. And when performing such a process, the technique which uses a pipe conveyor for conveyance of a raw material or a processed material is known by patent documents 1-4 etc., and this kind of pipe conveyor is enclosed in the sealed pipe. Since the loaded transported material is transported, the transported material is not scattered outside the system.
JP-A-7-277464 JP-A-9-250723 Japanese Patent Laid-Open No. 10-279039 Japanese Patent Laid-Open No. 2000-200146

  FIG. 4 shows a schematic configuration diagram of a conventional workpiece recovery apparatus, which is a carbide obtained by drying a raw material such as an organic water-containing substance in a pyrolysis apparatus in a drying furnace and pyrolyzing it in a carbonization furnace. The workpiece discharged from the thermal decomposition apparatus is transferred from the inlet 4a to the pipe conveyor 4 through the opening / closing damper 1, the relay hopper 2, and the opening / closing damper 3. It is thrown. Reference numerals 1a and 3a denote valves for opening and closing the open / close dampers 1 and 3, respectively. At this time, by opening the open / close damper 1, the workpiece is put into the relay hopper 2 and the open / close damper 1 is closed. Next, the open / close damper 3 is opened, and a workpiece is introduced into the pipe conveyor 4 from the input port 4a, and the open / close damper 3 is closed. By repeating such an operation, the workpieces are sequentially put into the pipe conveyor 4, and at this time, the amount of air entering the rotary kiln of the upstream thermal decomposition apparatus is suppressed. In the pipe conveyor 4, a work piece fed by driving a drive source 5 such as a geared motor is conveyed from one end to the other end, discharged from the discharge port 4 b at the other end, and collected as a work piece. The pipe conveyor 4 is continuously operated. A flexible connection 6 is provided between the open / close damper 1 and the relay hopper 2. Reference numeral 4c denotes a corner portion of the pipe conveyor 4, that is, a connecting portion between the horizontal portion and the vertical portion of the pipe conveyor 4.

  FIG. 5 is an enlarged cross-sectional view of the corner portion 4c of the pipe conveyor 4. Reference numeral 7 denotes a conveying pipe. Reference numeral 8 denotes a blade that has a shape substantially equal to or slightly smaller than the inner diameter of the pipe 7 and moves inside the pipe 7. , 9 is an endless link chain in which a plurality of blades 7 are connected at an appropriate interval, and is circulated and driven by a drive source 5. A transported object (workpiece) put into the pipe 7 by driving the endless link chain 9 is provided. ) Is pressed by the blade 8 and conveyed. In the corner portion 4 c, a corner protector 10 for protecting the inner wall of the pipe 7 from the link chain 9 and the blade 8 is provided on the inner side of the pipe 7.

  In the corner portion 4c of the pipe conveyor 4 described above, the fallen transported material easily accumulates as shown by the arrow 11 from the gap between the pipe 7 and the blade 8, and this deposited material 12 is used for the movement of the blade 8 and the link chain 9. In contrast, the resistance of the corner protector 10 also becomes a resistance, so that an overload acts on the drive source 5 of the link chain 9 to stop the drive source 5 and make it difficult to convey the conveyed product. . In addition, when the pipe conveyor 4 of the downstream workpiece collection device stops in this manner, the upstream thermal decomposition device also stops, making it difficult to perform stable processing. Furthermore, when the thermal decomposition apparatus is stopped, the raw material in the middle of the thermal decomposition reaction stops in the apparatus, which causes a bad odor when the apparatus is stopped or restarted. Therefore, the stop of the pipe conveyor 4 on the downstream side is a phenomenon that should be eliminated as much as possible in the operation of the processing equipment, and this phenomenon tended to occur when operating continuously for a long time.

  Therefore, after the drive source 5 was stopped, the pipe conveyor 4 was disassembled and investigated, and as a result, attention was paid to the fact that the link chain 9 was loosened on the pull side. That is, FIG. 6 is an explanatory diagram of a drive device for the link chain 9. The endless link chain 9 is engaged with the chain wheel 13, and the chain wheel 13 is driven by a drive source 5 such as a geared motor. When the chain wheel 13 is rotated clockwise as indicated by an arrow 14 by the drive source 5, the link chain 9 is separated into a pull side 9a and a return side 9b with the chain wheel 13 as a boundary. Although the tension 9a is tense, when the driving source 5 stops, the driving source 5 slightly reversely rotates, the return side 9b moves to the pulling side 9a, and the phenomenon that the pulling side 9a loosens is noticed. In addition, attention is paid to the fact that when the drive source 5 is restarted, the conveyed product can be conveyed normally.

  The present invention has been made to solve the above-described problems, prevents a stop due to an overload of a drive source of a pipe conveyor, can reliably convey a conveyed product, and stably processes a workpiece. It is an object of the present invention to obtain a pipe conveyor operating method, a pipe conveyor device and a processing facility capable of performing the above.

  The inventor does not operate the pipe conveyor continuously for a long time, but instead makes the drive source intermittent operation that repeats operation (forward rotation drive) and stop (including slight reverse rotation drive) or reverse rotation. When the drive source is stopped, attention is paid to the fact that the link chain tension is released, the blade moves in the reverse direction of the traveling direction, the overload state is released, and the stop of the drive source can be eliminated.

  According to a first aspect of the present invention, there is provided a pipe conveyor operating method comprising: a conveying pipe; a blade having a shape substantially equal to or slightly smaller than the inner diameter of the pipe; Of a pipe conveyor that includes a plurality of endless link chains that are connected at intervals of and that are circulated and driven by a drive source, and that transports an object loaded into the pipe by driving the endless link chain by pressing a blade. In the method, the movement of the endless link chain is made intermittent by making the drive source intermittent operation that repeats normal operation (conveyance direction) and stop or reverse rotation.

  A pipe conveyor device according to a second aspect of the present invention comprises a conveying pipe, a blade having a shape substantially equal to or slightly smaller than the inner diameter of the pipe, and a plurality of the blades connected at appropriate intervals. And an endless link chain that is circulated and driven by a drive source, and is a pipe conveyor that conveys a transported material that is thrown into the pipe by driving the endless link chain by pressing a blade. A control device that repeatedly performs forward operation (conveying direction) and stop or reverse rotation of the drive source is provided.

  The processing equipment according to claim 3 includes a thermal decomposition means for thermally decomposing the input raw material by indirect heating, a pipe conveyor for conveying a workpiece processed and discharged by the thermal decomposition means, and the thermal decomposition means In the processing equipment provided with gas combustion means for purifying by purifying the gas generated in the above, the pipe conveyor has a shape of a pipe for conveyance and a diameter substantially equal to or slightly smaller than the inner diameter of the pipe. A blade that moves in the pipe, and a plurality of the blades connected at an appropriate interval, and an endless link chain that is circulated by a drive source, and transported into the pipe by driving the endless link chain A control device that is a pipe conveyor that conveys objects by pressing blades, and repeatedly performs forward operation (conveying direction) and stop or reverse rotation of the drive source of the pipe conveyor It includes those were.

  In the processing equipment according to claim 4, the pipe conveyor is stopped by stopping the driving source or performing a slight reverse rotation.

  As described above, according to the present invention, the operation of the pipe conveyor is an intermittent operation in which the normal operation (conveying direction) and the stop or reverse rotation are repeated. The tension relationship with the deposit and the corner protector is released, and the overload state of the drive source is released. For this reason, a blade etc. move smoothly at the time of a restart, and a conveyed product can be conveyed reliably. In addition, since the pipe conveyor does not stop as described above, the processing equipment does not stop, stable processing can be performed, and the generation of bad odors does not occur.

Best Embodiment 1
The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a raw material charging apparatus according to Embodiment 1 of the present invention. A raw material introduced from outside the system is crushed by a crusher 15, and crushed material is fed into a pipe conveyor 16 from a loading port 16a. Then, it is conveyed to the hopper 17 by the pipe conveyor 16. Reference numeral 18 denotes a drive source for the pipe conveyor 16. The hopper 17 temporarily stores the conveyed crushed material and discharges it from the lower part. The crushed material discharged from the lower part of the hopper 17 is conveyed to the measuring device 20 by the screw conveyor 19. The screw conveyor 19 is driven by a motor 21. The weighing instrument 20 has a load cell 20 a, an open / close damper 22 and a flexible connecting portion 23 are provided between the screw conveyor 19 and the upper end of the weighing instrument 20, and an open / close damper 24 is also provided at the lower end of the weighing instrument 20. . The open / close dampers 22 and 24 are opened and closed by valves 22a and 24a, respectively. The valves 22a and 24a are controlled by the control device 27, and a measurement signal is sent from the load cell 20a to the control device 27. Further, the control device 27 controls the crusher 15 and the motor 21, and a measurement signal from a level sensor 28 that detects the level of the stored matter in the hopper 17 is input to the control device 27.

  In the weighing by the weighing instrument 20, the open / close damper 22 is opened, the crushed material is put into the weighing instrument 20, and the weighing damper 22 is closed to measure. After weighing, the open / close damper 24 is opened, and the crushed material is introduced into the pipe conveyor 25 from the input port 25a, and the open / close damper 24 is closed. Such an operation is repeated. The weighed crushed material is conveyed by the pipe conveyor 25 driven by the drive source 26, and is discharged from the discharge port 25b to the thermal decomposition apparatus. The structure of the pipe conveyors 16 and 25 is the same as that of the conventional one shown in FIGS. 4 to 6, and the drive sources 18 and 26 are driven and controlled by the control device 27.

  While the crusher 15 is operating, the pipe conveyor 16 is continuously operated. However, the crushing operation in the crusher 15 is stopped after the storage in the hopper 17 reaches a certain level, and the operation of the pipe conveyor 16 is an intermittent operation.

  Further, when the crushed material is transported by the pipe conveyor 25 and put into the thermal decomposition apparatus, it is necessary to measure the input mass, and therefore, the crushed material is intermittently charged into the pipe conveyor 25. . Therefore, the operation of the pipe conveyor 25 is intermittently operated (for example, 30 seconds normal operation (conveyance direction), 20 seconds stop) in accordance with the opening and closing of the open / close dampers 22 and 24. Although the shape of the crushed material is subdivided, it has a size of 1 to 3 cm. Therefore, the crushed material is unlikely to fall off the blade 8 during conveyance, and even if the drive sources 18 and 26 are continuously operated, the load is overloaded. There is almost nothing, but intermittent operation is desirable.

  In the first embodiment, since the pipe conveyors 16 and 25 are operated in the normal operation (conveying direction) and intermittent operation by repeating the stop, the pulling side 9a of the link chain 9 is loosened and accumulated in the pipe 7 at the time of the stop. The tension relationship between the deposit 12 and the corner protector 10 of the conveyed product is released, the deposit 12 and the corner protector 10 are no longer resistant to the blade 8 and the like, the overload state can be released, and the link is made at the time of restart. The chain 9 and the blade 8 can move smoothly, the drive sources 18 and 26 do not stop, and the crushed material can be reliably conveyed. In addition, since the upstream raw material charging apparatus does not stop, the downstream thermal decomposition apparatus does not stop, and stable processing can be performed as a whole. Therefore, generation of malodor due to the raw material during the thermal decomposition reaction does not occur. When stopping, it may be slightly reversed or reversed.

Embodiment 2
2 (a) and 2 (b) show a schematic configuration diagram of a workpiece recovery apparatus and an operation pattern diagram of the drive source 5 according to the second embodiment of the present invention. The configuration and operation of the workpiece recovery apparatus are shown in FIGS. The operation pattern of the drive source 5 is different from the conventional example shown in FIG. The workpiece collection device receives and collects a workpiece such as carbide from the pyrolysis device, but the form of the dry matter and carbide generated by the pyrolysis processing may differ from that of the raw material. For example, when sludge or scrap rubber having a fragile skeleton is a raw material, it is powdered or granulated by pyrolysis. For this reason, when the workpiece is conveyed by the pipe conveyor 4, when the workpiece is moved from the horizontal portion to the vertical portion of the pipe conveyor 4, the workpiece dropped from the blade 8 is accumulated in the corner portion 4c and the vertical portion. . Moreover, since the corner protector 10 that protects the inner wall of the pipe 7 exists inside the corner portion 4 c, the deposit 12 and the corner protector 10 may obstruct the movement of the blade 8 and the link chain 9.

  Therefore, the control device 27 controls the drive source 5 to drive the pipe conveyor 4 intermittently so that the movement obstacle is released. That is, when the operation pattern of the drive source 5 is, for example, (A) in FIG. 2B, the 30-second normal operation (conveying direction) and the 20-second stop are repeated in synchronization with the opening and closing of the open / close damper 3 (B In the case of), the intermittent operation is repeated by repeating the normal operation (conveying direction), stop, reverse rotation, stop, and normal operation in synchronization with the open / close timing of the open / close damper 3. As described above, by performing the intermittent operation, the overload state with respect to the drive source 5 can be released as in the first embodiment, and the drive source 5 does not stop and the workpiece can be reliably conveyed. In addition, the thermal decomposition apparatus and the raw material charging apparatus on the upstream side are not stopped, stable processing can be performed as a whole, and no odor is generated. The opening / closing dampers 1 and 3 are opened and closed by controlling the valves 1a and 3a by the control device 27. Further, it may be reversed when stopping.

Embodiment 3
FIG. 3 shows a schematic configuration diagram of a processing facility according to the third embodiment of the present invention, and 29 is a thermal decomposition apparatus that includes a drying furnace 30, a carbonization furnace 31 and the like, and indirectly heat-processes raw materials to obtain carbides. The drying furnace 30 is a means for heating the raw material charged at a heating temperature of 350 to 450 ° C. to evaporate and dry the moisture, and a rotatable first cracking furnace 32 employing a rotary kiln system, and a first cracking furnace 32. A heating jacket 33 as an external heating means for heating the first cracking furnace 32 from the outside by hot air gas introduced through a gas duct (not shown) formed on the outer peripheral side of the gas, and a rotation drive source and the like. . Hot air gas is introduced from a hot air furnace 40 described later. A crushed raw material from a raw material charging apparatus as shown in FIG. 1 is input to one end of the first cracking furnace 32 through a charging duct 34, and the first cracking furnace 32 rotates to move the crushed material to the other end side. Transport.

  The carbonization furnace 31 is a means for heating the crushed material dried in the drying furnace at a heating temperature of 450 to 650 ° C. and pyrolyzing (carbonizing and removing organic components). It comprises a decomposition furnace 35, a heating jacket 37 similar to the heating jacket 33, and a rotational drive source. The discharge side of the first cracking furnace 32 and the supply side of the second cracking furnace 35 are connected by a communication duct 38, and the steam generated in the first cracking furnace 32 and the pyrolysis generated in the second cracking furnace 35 are connected to the communication duct 38. A conduit 39 for transferring gas to the gas combustion furnace 41 is connected.

  The hot air furnace 40 is a means for supplying hot air gas, and includes a combustion burner 42 for generating hot air gas. The generated hot air gas is supplied to the heating jacket 37 of the carbonization furnace 31 to heat the second cracking furnace 35 and then supplied to the heating jacket 33 of the drying furnace 30 to heat the first cracking furnace 32. Thus, the crushed material indirectly heated by the hot air gas in the drying furnace 30 and the carbonization furnace 31 is dried and pyrolyzed, and is also transferred into the second cracking furnace 35 and discharged as carbide from the discharge duct 43, as shown in FIG. ) And is conveyed and collected by the pipe conveyor 4.

  On the other hand, the hot air gas discharged from the heating jacket 33 is exhausted to the outside or the like through the circulation blower 44, and a part of the hot air gas is supplied to the ejector 46 through the blower 45 and is used as ejector driving gas in the gas combustion furnace 41. Used. The gas combustion furnace 41 is supplied with water vapor and pyrolysis gas via a conduit 39 and an ejector 46 to burn and purify them, and includes a combustion burner 47 for combustion. Combustion by the combustion burner 47 is appropriately adjusted by adjusting the fuel supply amount in accordance with the amount of pyrolysis gas generated.

  The gas at about 850 ° C. that has been burned and purified in the gas combustion furnace 41 is cooled to about 150-200 ° C. by the gas-gas heat exchange type heat exchanger 48 using air as a cooling medium, and the bag filter 49, the exhaust blower 50, It is discharged out of the system through the chimney. Cooling air is also introduced before and after the heat exchanger 48 as necessary. In addition, the air heated in the heat exchanger 48 is introduced into the hot air furnace 40 and used to generate hot air gas. In addition, when the moisture content of raw materials such as scrap rubber and plastics is low, the drying furnace 30 may be omitted.

  In the third embodiment, the processed material that has been pyrolyzed by the pyrolyzing device 29 and discharged is transported by the pipe conveyor 4 in the processed material collecting device in the next step. Therefore, by making this pipe conveyor 4 an intermittent operation in which the normal operation (conveying direction) and the stop are repeated, the overload state with respect to the drive source 5 is eliminated, and the workpiece can be reliably conveyed, The thermal decomposition apparatus 29 and the raw material charging apparatus on the side are not stopped, the processing equipment as a whole can be stably processed, and no odor is generated. Also in the third embodiment, the stop during the intermittent operation of the drive source 5 may be slightly reversed or reversed.

1 is a schematic configuration diagram of a raw material charging apparatus according to Embodiment 1 of the present invention. It is a schematic block diagram of the workpiece collection apparatus by Embodiment 2, and the driving | running pattern figure of a drive source. It is a schematic block diagram of the processing equipment by Embodiment 3. It is a schematic block diagram of the conventional workpiece collection apparatus. It is an expanded sectional view of the corner part of a pipe conveyor. It is explanatory drawing of the drive device of an endless link chain.

Explanation of symbols

4, 16, 25 ... pipe conveyor 4c ... corner 5, 18, 26 ... drive source 7 ... pipe 8 ... blade 9 ... endless link chain 10 ... corner protector 12 ... deposit 27 ... control device 29 ... pyrolysis device 39 ... Conduit 40 ... Hot stove 41 ... Gas combustion furnace

Claims (4)

  A conveying pipe, a blade having a shape approximately equal to or slightly smaller than the inner diameter of the pipe and moving in the pipe, a plurality of the blades are connected at appropriate intervals, and are circulated by a drive source An endless link chain, and a driving method of a pipe conveyor that transports an object loaded into a pipe by driving the endless link chain by pressing a blade. An operation method for a pipe conveyor, characterized in that the movement of the endless link chain is made intermittent by performing intermittent operation that repeats reverse rotation.   A conveying pipe, a blade having a shape approximately equal to or slightly smaller than the inner diameter of the pipe and moving in the pipe, a plurality of the blades are connected at appropriate intervals, and are circulated by a drive source An endless link chain, and a pipe conveyor that conveys a material loaded into the pipe by driving the endless link chain by pressing a blade, and a normal operation (conveying direction) of a driving source of the pipe conveyor; A pipe conveyor device comprising a control device that repeatedly performs stop or reverse rotation.   Pyrolysis means that thermally decomposes the input raw material by indirect heating, a pipe conveyor that conveys the processed material that is processed and discharged by the thermal decomposition means, and burns and purifies the gas generated in the thermal decomposition means In the processing equipment comprising the gas combustion means for performing the above, the pipe conveyor has a pipe for transport, a blade having a shape substantially equal to or slightly smaller than the inner diameter of the pipe, and moving in the pipe, A pipe that connects a plurality of blades at appropriate intervals and is endlessly linked by a drive source, and that transports a material loaded into the pipe by driving the endless link chain by pressing the blade. It is a conveyor and is equipped with a control device that repeatedly performs forward operation (conveying direction) and stop or reverse rotation of the drive source of the pipe conveyor. Equipment.   The pipe conveyor operating method, pipe conveyor device, or processing facility according to any one of claims 1 to 3, wherein the pipe conveyor is stopped by stopping or slightly reversing the drive source.

Images