JP5390475B2 - Solid-liquid separation and recovery equipment - Google Patents

Description

  The present invention relates to a solid-liquid separation and recovery device that separates and recovers a solid component from a slurry discharged from a disposer.

  The disposer is an apparatus that pulverizes cocoons to produce a mixture (slurry) of cocoons and water. In general households, the slurry generated by the disposer is directly discharged into public sewers, etc., but in facilities where a large amount of drought occurs such as cooking facilities for lunch, the slurry is passed through a solid-liquid separation and recovery device, Solid components (crushed soot) are separated and recovered from the slurry, and only liquid components (sewage) are discharged to public sewers.

  In Patent Document 1, a screw is provided inside a screen cylinder having a large number of dewatering holes, and the liquid component of the slurry (sewage) is conveyed while the slurry is conveyed from one end to the other end (discharge side) of the screen cylinder. ) Is discharged from the dewatering hole of the screen cylinder. The opening on the discharge side of the screen cylinder has a pressing lid, and the solid component (crushed soot) separated from the slurry pushes up the pressing lid and is discharged from the gap between the opening and the pressing lid.

  Well, for example, if the slurry contains strong fibers such as cabbage or beef bowl, the fiber components get entangled in the screen cylinder of the solid-liquid separation and recovery device, or they get entangled in the dewatering holes of the screen cylinder. As a result, the discharge of the soot may be hindered and the screen tube may be clogged. In addition, when the soot is clogged, an excessive load is applied to the motor that drives the screw, and the motor may be burned out.

  In order to solve this problem, in the solid-liquid separation and recovery apparatus of Patent Document 1, when the load of the motor that drives the screw becomes large, the holding lid is rotated in the direction of rotation of the screw and is placed in the screen cylinder. It encourages the discharge of clogged fiber components.

  Patent Document 2 discloses that a solid-liquid separation and recovery device is provided with a lid opening device that opens a pressing lid, and the lid opening device is operated by an overload signal of a motor that drives a screw.

  Patent Document 3 discloses a solid-liquid separation and recovery device in which the weight is connected to the holding lid so that the weight acts on the closing lid in the closing direction. The solid-liquid separation / recovery device further includes a lifter that lifts the weight from below if necessary, and when the motor that drives the screw is overloaded, the lifter is operated to close the presser lid. I try to reduce my power.

Japanese Patent No. 3628121 JP 2004-276046 A JP 2004-344960 A

  As described above, the solid-liquid separation and recovery devices of Patent Documents 1 to 3 include means for assisting the opening of the presser lid, so that the bag is clogged in the screen cylinder, and the load on the motor that drives the screw increases. In such a case, the means is operated to prompt the discharge of the soot.

  However, even with such a configuration, clogging of the ridges may not be resolved.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a solid-liquid separation and recovery device that can reliably eliminate clogging in a screen cylinder.

In order to solve the above problems, a solid-liquid separation and recovery apparatus of the present invention includes a screen cylinder, a screw that is disposed inside the screen cylinder, and that conveys slurry flowing into the screen cylinder to the discharge side of the screen cylinder, In the solid-liquid separation and recovery device comprising a pressing lid attached to the discharge-side opening of the screen cylinder and a driving means for rotationally driving the screw, a water injection nozzle for injecting water toward the screen cylinder, When the load applied to the driving means exceeds a predetermined threshold value, the control means includes a control means for operating the water injection nozzle and an assisting means for assisting the opening of the pressing lid, and the control means is added to the driving means. When the state where the load exceeds a predetermined threshold continues for a first predetermined time, the water injection nozzle and the assisting means are operated, and The control means stops the operation of the assisting means when a second predetermined time has elapsed from the start of the operation of the water injection nozzle and the assisting means, and a third predetermined time has elapsed from the elapse of the second predetermined time. In this case, the operation of the water injection nozzle is stopped .

  Alternatively, the control means extends the operation of the assisting means when the load applied to the driving means exceeds a predetermined threshold when the second predetermined time elapses, and The operation of the assisting means may be stopped when a fourth predetermined time has elapsed since the elapse of the predetermined time.

  Further, the control means may stop the operation of the solid-liquid separation and recovery device when the load applied to the driving means exceeds a predetermined threshold when the fourth predetermined time has elapsed. Good.

  According to the present invention, water is poured into the bottle filled in the screen cylinder to soften the bottle, so that the bottle jam is easily eliminated and the bottle is discharged.

  Moreover, if the opening is opened by operating the assisting means at the same time that the soot is bathed, the soot is more reliably discharged.

  In addition, if the condition for starting water injection is that the overload state of the drive means continues beyond a predetermined time, water injection for an accidental temporary overload state can be avoided.

  Further, if the overload state is not eliminated even if the opening and water injection are continued, the clogging can be more reliably eliminated by extending the opening time of the opening.

  In addition, if the overload state is not resolved even if the opening time of the opening is extended, if the operation of the solid-liquid separation and recovery device is stopped, fatal damage to the solid-liquid separation and recovery device (for example, motor failure) Burn-in) can be avoided.

It is a notional block diagram of a solid-liquid separation collection device. It is a flowchart which shows the outline | summary of the process by a clogging elimination program.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  The solid-liquid separation and recovery device 1 is an example of an embodiment of the present invention, and includes a dehydrator 3 and a controller 4 inside a housing 2 as shown in FIG.

  The dehydrator 3 includes a screen cylinder 6 inside the outer cylinder 5 and a screw 7 inside the screen cylinder 6. In addition, an electric motor 8 is provided below the dehydrator 3 to drive the screw 7 to rotate.

  A supply port 9 is provided at the lower end of the screen cylinder 6. The supply port 9 is connected to a disposer (not shown), and slurry generated by the disposer flows into the screen cylinder 6 through the supply port 9. The slurry that flows in is pushed up above the screen cylinder 6 by the screw 7.

  The screen cylinder 6 has a number of dewatering holes (not shown). While the slurry passes through the screen cylinder 6, the liquid component (sewage) in the slurry passes through the dewatering holes and passes through the screen cylinder 6. It flows out to the outside (the space between the screen cylinder 6 and the outer cylinder 5). Then, the liquid component (sewage) is discharged to the outside of the dehydrator 2 through the drain port 10 and finally discharged to a public sewer or the like (not shown). Further, the slurry that has lost the liquid component (sewage), that is, the solid content (soot) in the slurry is discharged from the discharge port 11 at the upper end of the screen cylinder 6, passes through the discharge chute 12, and a container (for example, a garbage bucket) not shown. Is housed in.

  Further, inside the discharge chute 12, there is a pressing lid 13 that is attached to the discharge chute 12 via a hinge 14 and covers the discharge port 11. A lever 15 is connected to the presser lid 13, and a spring 16 is stretched between the end of the lever 15 and the housing 2. The spring 16 acts in a direction in which the pressing lid 13 is pressed against the discharge chute 12, that is, in a direction in which the discharge port 11 is closed. Therefore, the solid component (slag) of the slurry pushed up by the screw 7 pushes up the holding lid 13 against the force of the spring 16 and goes out of the discharge port 11. At this time, the solid component (slag) of the slurry is sandwiched between the screw 7 and the pressing lid 13 and compressed, and the remaining liquid component (sewage) is squeezed out.

  Although the basic function of the solid-liquid separation and recovery apparatus 1 is realized by the above-described configuration, the solid-liquid separation and recovery apparatus 1 additionally includes a water injection nozzle 17 in order to eliminate clogging of the screen cylinder 6. And a linear head 18.

  The water injection nozzle 17 is a nozzle that injects water toward the screen cylinder 6 and is fixed to the outer cylinder 5. Moreover, the water injection nozzle 17 is connected to a water supply source (not shown) (for example, water supply) via an electromagnetic valve 19, and the electromagnetic valve 19 is connected to the controller 4 and is opened / closed by a command from the controller 4. That is, the water injection nozzle 17 operates according to a command from the controller 4.

  Although details will be described later, the water injection nozzle 17 operates in response to a command from the controller 4 when the slurry solid component (soot) is clogged in the screen cylinder 6, so that the solid component (soot ) To soften the solid component (soot) and function as a means for promoting discharge from the screen cylinder 6.

  The linear head 18 is a linear motion device that includes a casing 20 and an output shaft 21 and moves the output shaft 21 with respect to the casing 20 with an electric motor and a rack and pinion mechanism (not shown) built in the casing 20. 21 is connected to the lever 15 via a wire 22. The casing 20 of the linear head 18 is fixed to the outer cylinder 5. Since it is comprised in this way, if the linear head 18 is operated and the wire 22 is pulled, the pressing lid 13 will open. The linear head 18 is connected to the controller 4 and operates according to a command from the controller 4. That is, the linear head 18 is a device that operates in response to a command from the controller 4 and assists the opening of the presser lid 13.

  As will be described in detail later, the linear head 18 operates when the solid component (slag) of the slurry is clogged in the screen cylinder 6, in other words, when the pressing lid 13 cannot be pushed open only by the thrust of the screw 7. .

  The controller 4 is a computer that controls not only the linear head 18 and the electromagnetic valve 19 but also the entire solid-liquid separation and recovery device 1 including the electric motor 8. The solid-liquid separation and recovery device 1 is operated by a command from the controller 4. . Alternatively, the controller 4 operates the solid-liquid separation / recovery device 1 in response to a command from a host system (not shown) (for example, a soot processing system that combines the disposer, storage tank, drainage pump, and solid-liquid separation / recovery device 1) To do.

  The controller 4 is installed with a program describing the operation procedure of the solid-liquid separation / recovery device 1, and the controller 4 operates the solid-liquid separation / recovery device 1 according to the program. In addition to a program that describes the procedure of normal operation (operation in which no clogging of the solid component (soot) in the slurry occurs in the screen cylinder 6), the controller 4 has a clogging elimination program as shown in FIG. Is installed. The operation procedure of the water injection nozzle 17 and the linear head 18 described above is described in the clogging elimination program. Hereinafter, the processing by the clog elimination program will be described with reference to FIG.

  The clogging elimination program is an interruption program that is activated when the screen tube 6 is clogged during normal operation. Specifically, when the drive current of the electric motor 8 is monitored by the controller 4 and the drive current exceeds a predetermined threshold (hereinafter, the state where the drive current exceeds the predetermined threshold is referred to as “overload state”), It is activated. That is, in the solid-liquid separation and recovery apparatus 1, when the driving current of the electric motor 8 exceeds a predetermined threshold value, it is considered that clogging has occurred and the clogging elimination program is started.

  When the clogging elimination program is activated, it first stands by for 3 seconds (first predetermined time) (step 01). If the drive current of the electric motor 8 is below a predetermined threshold after the first predetermined time has elapsed, that is, if the overload condition has been eliminated (step 02; NO), the clog elimination program ends. If the drive current of the electric motor 8 exceeds the predetermined threshold even after the first predetermined time has elapsed, that is, if the overload state continues (step 02; YES), the process proceeds to step 03. As described above, when the overload state is resolved within 3 seconds from the occurrence, the processing such as water injection as described below is not performed. This is because, if water is poured every time a temporary or accidental clogging occurs, excess water is added to the culm discharged from the solid-liquid separation and recovery device 1, and the original function of the solid-liquid separation and recovery device 1 is restored. This is in order to avoid water injection for temporary and accidental clogging.

  Now, if the overload state of the electric motor 8 continues for 3 seconds or more (step 02; YES), the linear head 18 is operated and the wire 22 is drawn (step 03). Then, the pressing lid 13 rotates around the hinge 14 and the discharge port 11 is opened. Then, the electromagnetic valve 19 is opened and water is injected from the water injection nozzle 17. That is, water injection is started for the soot stuck in the screen cylinder 6 (step 04).

  In this way, the presser lid 13 that has been holding the soot at the discharge port 11 opens, and the soot that is clogged in the screen tube 6 is softened by receiving water injection, so that the discharge of the soot from the discharge port 11 is promoted. . In other words, elimination of clogging in the screen cylinder 6 is promoted.

  Then, it waits for 5 seconds (second predetermined time) (step 05). Thereafter, if the overload state of the electric motor 8 continues when the second predetermined time has elapsed (step 06; YES), the process proceeds to step 11. If the overload state has been eliminated (step 06; NO), the operation of the linear head 18 is released. That is, the wire 22 that has been attracted is restored (step 07). Then, it waits again for 5 seconds (step 08).

  After waiting for another 20 seconds (step 09), that is, when 25 seconds (third predetermined time) have elapsed since the second predetermined time has elapsed, the solenoid valve 19 is closed and water injection from the water injection nozzle 17 ( Water injection) is stopped (step 10), and the clogging elimination program is terminated. Thereafter, the solid-liquid separation and recovery device 1 returns to the normal operation.

  Now, in step 06, if the overload state of the electric motor 8 continues (step 06; YES), it waits for 5 seconds (step 11). That is, the open state of the presser lid 13 is extended for 5 seconds (fourth predetermined time). After that, that is, when the fourth predetermined time has elapsed, if the overload state of the electric motor 8 has been resolved (step 12; NO), the operation of the linear head 18 is released. That is, the wire 22 that has been attracted is returned to its original state (step 13). Then, the process proceeds to Step 09, and the program as described above is followed to end the clogging elimination program. Thereafter, the solid-liquid separation and recovery device 1 returns to the normal operation.

  On the other hand, also in step 12, if the overload state of the electric motor 8 continues (step 12; YES), the solid-liquid separation and recovery device 1 is urgently stopped (step 14). The emergency stop is performed by stopping all the operations of the solid-liquid separation and recovery device 1. That is, not only the electric motor 8 but also the energization to the linear head 18 and the electromagnetic valve 19 is stopped.

  As described above, the solid-liquid separation and recovery apparatus 1 operates the linear head 18 and the electromagnetic valve 19 when the solid component (slag) of the slurry is clogged in the screen cylinder 6 and the motor 8 is overloaded. Then, the presser lid 13 is opened, and water is injected from the water injection nozzle 17 to the solid component (soot) in the slurry in the screen cylinder 6, so that the clogging of the screen cylinder 6 can be reliably eliminated.

  The solid-liquid separation and recovery apparatus 1 is an example of an embodiment of the present invention, and the technical scope of the present invention is not limited by the solid-liquid separation and recovery apparatus 1. The present invention can be freely applied, modified or improved within the scope of the technical idea described in the claims.

  For example, in the above-described embodiment, the solenoid valve 19 is connected to a water supply source (water supply) and normal temperature water is injected from the water injection nozzle 17. For example, a hot water heater may be provided and hot water may be jetted from the water injection nozzle 17.

  In the above embodiment, the drive current supplied to the electric motor 8 is monitored by the controller 4 and the state where the drive current exceeds a predetermined threshold is determined as an overload state. The means for detecting the size is not limited to this. For example, a torque sensor may be attached to the output shaft of the electric motor 8 to monitor the output torque of the electric motor 8. Alternatively, the rotational speed of the electric motor 8 may be monitored, and a state where the rotational speed of the electric motor 8 is reduced or stopped may be determined as an overload state.

  Moreover, in the said embodiment, in order to prevent drawing becoming complicated, the example which connected the motor 8, the linear head 18, and the electromagnetic valve 19 and the controller 4 directly was shown, but this is a conceptual structure to the last. It is an illustration, and the present invention is not limited to the one in which the computer (controller 4) and the electric motor 8 are directly connected. A current monitoring circuit for monitoring the drive current of the motor 8 may be placed between the computer and the motor 8 so that when the drive current exceeds a predetermined threshold, the current monitoring circuit sends a signal to the computer. . Alternatively, a relay for turning on and off the current for operating the linear head 18 and the electromagnetic valve 19 may be provided, and the relay may be operated by a signal sent from a computer.

  Moreover, in the said embodiment, although the solenoid valve 19 was connected to the water supply source (water supply) and the normal temperature water was injected from the water injection nozzle 17, the heating means (between the water supply source and the water injection nozzle 17 ( For example, a hot water heater may be provided and hot water may be jetted from the water injection nozzle 17.

  Moreover, in the said embodiment, although the holding lid 13 was pivotally supported by the hinge 14, the example which pressed the holding lid 13 against the discharge chute 12 with the spring 16 was shown, these are illustrations, Comprising: Various structures and forms are shown. You can choose. In short, it is sufficient if the presser lid 13 is configured to push back the solid component (厨 芥) of the slurry pushed out from the discharge port 11 by the screw 7 with an appropriate force.

  Moreover, in the said embodiment, although the example which connected the lever 15 and the linear head 18 with the wire 22 was shown as a specific example of an assistance means, these are illustrations and can select various structures and forms. . In short, it is sufficient to assist all or part of the force required to open the pressing lid 13 when the pressing lid 13 cannot be opened only by the thrust of the solid component (成分) of the slurry pushed out from the discharge port 11 by the screw 7. is there. For example, as disclosed in Patent Document 1, the pressing cover may be rotated in the same direction as the screw to assist the opening of the pressing cover, or the pressure cover as disclosed in Patent Document 3. The weight acting in the closing direction may be lifted by a lift to reduce the force for closing the pressing lid. The power for driving the assisting means is not limited to electric power. For example, it may be powered by aerodynamic force or hydraulic pressure.

  In the description of the clogging elimination program, the first to fourth predetermined times have been described with specific numerical values. However, these numerical values are merely examples, and the technical scope of the present invention is based on these numerical values. It goes without saying that it is not limited.

DESCRIPTION OF SYMBOLS 1 Solid-liquid separation and recovery apparatus 2 Case 3 Dehydrator 4 Controller 5 Outer cylinder 6 Screen cylinder 7 Screw 8 Electric motor 9 Supply port 10 Drain port 11 Discharge port 12 Discharge chute 13 Holding lid 14 Hinge 15 Lever 16 Spring 17 Injection nozzle 18 Linear Head 19 Solenoid valve 20 Casing 21 Output shaft 22 Wire

Claims (3)

A screen tube,
A screw that is disposed inside the screen cylinder and conveys the slurry flowing into the screen cylinder to the discharge side of the screen cylinder;
A holding lid attached to the opening on the discharge side of the screen tube;
In the solid-liquid separation and recovery device comprising a driving means for rotationally driving the screw,
A water injection nozzle for injecting water toward the screen tube;
Control means for operating the water injection nozzle when a load applied to the driving means exceeds a predetermined threshold ;
With an assisting means for assisting the opening of the pressing lid,
The control means operates the water injection nozzle and the assisting means when a state in which a load applied to the driving means exceeds a predetermined threshold continues for a first predetermined time,
Further, the control means stops the operation of the assisting means when a second predetermined time has elapsed from the start of operation of the water injection nozzle and the assisting means, and the third predetermined time from the elapse of the second predetermined time. The solid-liquid separation and recovery device is characterized in that the operation of the water injection nozzle is stopped when the time elapses . The control means extends the operation of the assisting means when the load applied to the driving means exceeds a predetermined threshold at the time when the second predetermined time elapses, and the control means extends the second predetermined time. solid-liquid separation and recovery device according to claim 1 of a predetermined time from the course of the fourth is characterized by the operation of the assisting means be stopped when the elapsed. The control means stops the operation of the solid-liquid separation and recovery device when the load applied to the driving means exceeds a predetermined threshold when the fourth predetermined time has elapsed. Item 3. The solid-liquid separation and recovery device according to Item 2 .

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