JP2009297703A - Method and apparatus for transporting organic dewatered sludge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for transporting organic dewatered sludge, capable of improving the suction efficiency of a pressure pump and reducing the pressure loss in pipe transportation during pumping of the dewatered sludge, by applying a shear force efficiently to the whole of the dewatered sludge. <P>SOLUTION: The dewatered sludge is compressed and transported in a state where the pipe friction resistance and flow resistance of the dewatered sludge are reduced by applying a shear force to the dewatered sludge under a compacted state to promote the exudation of water in the dewatered sludge before transferring the dewatered sludge to the transportation process. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and apparatus for transporting organic dehydrated sludge, and in particular, an organic substance composed of aggregates (floc) of a large number of cell groups by dewatering sludge (surplus sludge) after biological treatment such as activated sludge treatment. The present invention relates to a method and apparatus for conveying dehydrated sludge.

  The sewage sludge generated at the sewage treatment plant is treated with activated sludge from organic matter contained in the sewage and fixed in the form of microorganisms, and then these microorganisms, their dead bodies, excrement and other fine suspended particles It is agglomerated and precipitated by a required aggregating agent such as an aggregating agent or a polymer aggregating agent. Therefore, since the sewage sludge contains a large amount of organic matter, it is generally concentrated using gravity separation, flotation separation, etc., and then pressurized dehydration equipment such as a vacuum dehydrator or a belt press, or a centrifugal separator. In many cases, the moisture content is reduced to about 60 to 90% using a dehydrating device such as a separator to form a cake-like dewatered sludge (dehydrated cake), and then sent to an incinerator for incineration.

Thus, when dehydrated sludge is sent to an incinerator for incineration, the dehydrated sludge recovered from the dehydrator has a high viscosity, so that it is pumped through the dehydrated sludge transport pipe using a pump. I have to.
For example, a reciprocating piston-type pump (hereinafter referred to as a piston pump) is used as a pump used for pumping this dewatered sludge. Piston pumps have a configuration in which a conveyed product is sucked into a cylinder in a piston suction process and is press-fitted into a transport pipe in a discharge process, and is widely used because of high discharge pressure and long distance transport.

FIG. 15 shows an example in which a piston pump is applied. As shown in the figure, sludge dehydrated by a dehydrator 01 (such as the dehydrator described above) is supplied to the piston pump 02 to drive the piston pump 02. Thus, it is pumped through the dewatered sludge transport pipe (FIG. 15B).
FIG. 15A shows an example in which the line of the dehydrator 01 and the piston pump 02 is configured via a conveyor 06 such as a belt conveyor. A method of transporting dewatered sludge with a piston pump in such a configuration is conventionally known.

By the way, the viscosity of the dehydrated sludge described above changes when the moisture content fluctuates.
For this reason, there is a concern that the lower the moisture content, the lower the suction efficiency of the conveyed product in the suction stroke, and the increase in required power due to the increase in pressure loss during pumping.
Furthermore, due to differences in the location of dewatered sludge, the dewatering process, etc., pipe friction resistance and fluid property values in transport pipes are often different even at the same moisture content, so this must be addressed. There is a problem.

  Therefore, in order to reduce the decrease in the suction efficiency of the conveyed product during the suction stroke and the increase in pressure loss during the pumping as described above, the piping friction resistance and flow resistance of the dewatered sludge in the sludge transport pipeline are reduced. You can do it. As an invention for reducing the pipe frictional resistance and flow resistance of this dewatered sludge, for example, it is proposed that the dewatered sludge is supplied after being fluidized or liquefied by a shear blade before being supplied to a pressure feed pump as shown in FIG. (Patent Document 1).

As shown in FIG. 16, the cake storage hopper 011 includes a hopper 012, a dehydrated cake (dehydrated sludge) inlet 013 provided on the hopper 012, a scraper 015 as a pulverization blade for roughly pulverizing the dehydrated sludge, a shear The dewatered sludge, which is composed of a plurality of blades as a blade and is temporarily stored in the cake storage hopper 011 and fluidized or liquefied, is sucked into the reciprocating volume pump 02 and into the transport pipe 025. Exhaled. Accordingly, the dewatered sludge is sequentially pumped from the transport pipe 025.
That is, before supplying to the pressure pump 02, the dewatered sludge is fluidized or liquefied by applying a shearing force to the dewatered sludge by the chopper 010 which is a shear blade to reduce the pipe friction resistance and the flow resistance. As well as improving the suction efficiency, the pressure loss during pumping of dewatered sludge is reduced.

JP 2007-820 A

As described above, the problem with transporting organic dewatered sludge using a pressure pump is that the suction efficiency of the transported material decreases during the suction process due to the high viscosity of the dewatered sludge, and the pressure loss during dewatered sludge pumping increases. Is mentioned. As a countermeasure against this, in Patent Document 1, fluidization or liquefaction is performed by a shear blade before being supplied to a pressure pump. As described above, the invention disclosed in Patent Document 1 is considered to be effective as an invention for improving the suction efficiency of the pressure pump and reducing an increase in pressure loss at the time of dewatered sludge pressure feeding. In order to apply a shearing force to the whole, it is necessary to rotate the shearing blade at a high speed, and the stirring power associated therewith increases. Therefore, there is a demand for a more effective method for imparting shear force to the entire dewatered sludge.
Therefore, in view of the above-mentioned problems of the prior art, the present invention efficiently applies a shearing force to the entire dewatered sludge, improves the suction efficiency of the pressure feed pump, and reduces the pressure loss of the pipe transportation when the dewatered sludge is pumped. An object of the present invention is to provide a method and apparatus for transporting organic dehydrated sludge that can be carried out.

Therefore, in order to solve the problem, the present invention provides a method for transporting organic dewatered sludge dehydrated to 60 to 90% by a dehydrator before the dehydrated sludge is transferred to the transport process. By compressing and transporting the dehydrated sludge with reduced pipe frictional resistance and flow resistance by applying a shearing force to the squeezed state to promote the exudation of moisture in the dehydrated sludge. Here, the conveyance process is a process in which dewatered sludge is conveyed by a pressure feed pump such as a piston pump.
Thus, by applying a shearing force before the dehydrated sludge is transferred to the transport process, moisture in the dehydrated sludge oozes out, and the pipe friction resistance and flow resistance of the dehydrated sludge are reduced. For this reason, the suction efficiency of a pressure pump such as a piston pump can be improved, and the pressure loss in the piping can be reduced. Further, since the shear force can be efficiently applied to the entire dehydrated sludge with low power, the agitation power can be reduced, and energy saving in transportation of the dehydrated sludge piping can be achieved.

  The organic dehydrated sludge is an aggregate of a large number of cell groups after biological treatment. Moisture contained in the dehydrated sludge, which is an aggregate (floc) of many cells, is oozed out to the surface by applying a shearing force. Thereby, the moisture oozed out to the surface promotes the action like a lubricant, and the piping frictional resistance of the dewatered sludge is reduced. Furthermore, since the viscosity of the dewatered sludge is lowered, the flow resistance is also reduced. If a high shear force is applied, the cell membrane is partially destroyed, and further reduction of pressure loss can be expected by promoting the exudation of intracellular moisture.

Further, the application of shearing force to the dewatered sludge is performed by rolling between a pair of rollers provided at the outlet of the dehydrator or the belt conveyor and having a minute gap between which the sludge is consolidated. It is characterized by.
In this way, the pipe frictional resistance of the dewatered sludge can be obtained by applying a shearing force using a roller before the dehydrator exit or the belt conveyor outlet side before the transfer process is performed, that is, before supplying the dewatered sludge to the piston pump. In addition, the flow resistance is reduced, the suction efficiency of the piston pump is improved, and the pressure loss in the pipe is reduced.

Furthermore, the application of shearing force to the dewatered sludge is provided on the dehydrator outlet or the belt conveyor outlet side, rolling between the screw pair of the twin screw, rolling of the single screw, rolling of the ribbon screw, It is characterized by being carried out by rolling of a rotor of a single screw pump or kneading motion of a kneader.
Thus, before supplying dewatered sludge to the piston pump, by applying shearing force with a twin screw, uniaxial screw, ribbon screw, uniaxial screw pump, kneader, etc., it is the same as applying shearing force with the roller described above In addition, the pipe friction resistance and flow resistance of the dewatered sludge are reduced, the suction efficiency of the piston pump is improved, and the pressure loss in the pipe is reduced. As a kneader, a kneader, a roll mill, an extruder, an ink roll, a Banbury mixer, or the like is preferably used.

Further, the dewatered sludge is given a shearing force by rolling between the roller pair, and then given a shearing force by at least one of a twin screw, a single screw, a ribbon screw, a single screw pump, or a kneader. It is characterized by that.
Thus, by applying a shear force to the dewatered sludge preliminarily with a roller, for example, even if the sludge has a low water content so that it is difficult to apply the shear force with a single screw pump alone, the shear force is efficiently Can be granted.

As an invention of an apparatus that suitably implements these, an organic dehydrated sludge transporting apparatus that transports organic dehydrated sludge dehydrated to a moisture content of 60 to 90% by a dehydrator through a compacted transport body including a piston pump. In addition, a shearing force is applied to the dewatered sludge under a compacted state between the dewaterer outlet or the belt conveyor outlet side and the compacted transport body including the piston pump to promote the exudation of moisture in the dewatered sludge. Thus, a resistance reducing means for compressing and conveying the dehydrated sludge in a state where the pipe friction resistance and flow resistance are reduced is interposed.
The organic dehydrated sludge is an aggregate of a large number of cell groups after biological treatment.

Further, the resistance reduction means is performed by rolling between a pair of rollers having a minute gap in which sludge is consolidated between the pair of rollers.
Further, the resistance reducing means is provided on the dehydrator outlet or the belt conveyor outlet side, and rolls between a pair of screws of a twin screw, rolling of a single screw, rolling of a ribbon screw, rotor of a single screw pump. It is characterized by being carried out by rolling or kneading movement of a kneader.

Furthermore, the resistance reduction means is formed by providing at least one of a roller, a biaxial screw, a monoaxial screw, a ribbon screw, a monoaxial screw pump, or a kneading machine that applies the shearing force in series. .
Further, at least one of the above-described biaxial screw, monoaxial screw, ribbon screw, monoaxial screw pump or kneader is an apparatus for supplying organic dehydrated sludge to a compacted conveying body including the piston pump. Thereby, while providing a shearing force to dewatered sludge, it is provided as an apparatus which relays the compacting conveyance body containing a dehydrator and a piston pump.
In addition, each apparatus which provides the shearing force described above can be combined with each other without departing from the gist of the present invention.
Thereby, like the above-described method invention, the pipe friction resistance and flow resistance of the dewatered sludge can be reduced, the suction efficiency of the piston pump can be improved, and the pressure loss in the pipe can be reduced.

Moreover, it is preferable that the moisture content of the said dewatered sludge is 65 to 82%.
This is because when the moisture content is less than 65%, the concentration of dehydrated sludge is high, so even if the floc in the dehydrated sludge is partially destroyed, the sludge cells that ooze out on the surface with less water trapped in the flock Since interstitial water is scarcely contained, it is difficult to smoothly operate the resistance reducing means that imparts shearing force. On the other hand, when the moisture content is higher than 82%, the dewatered sludge already has some fluidity. Therefore, since the effect of the present embodiment does not appear remarkably, the resistance reduction means can be stably operated and the resistance reduction means by setting the moisture content of the dewatered sludge to be conveyed to 65 to 82%. By applying a shearing force at, it becomes possible to greatly improve the transport efficiency of dehydrated sludge.

Further, a hopper for receiving the dewatered sludge is provided on the inlet side of the piston pump,
Between the hopper and the piston pump, the dewatering sludge is pushed from the hopper into the piston pump, and the resistance reducing means for applying a shearing force to the dewatered sludge under a compacted state is interposed, and the piston pump and the resistance It is characterized by integrating the reducing means.
Thus, by interposing a resistance reducing means between the hopper and the piston pump and applying a shearing force to the dewatered sludge by the resistance reducing means, the pipe friction resistance and flow resistance of the dewatered sludge are reduced, and the piston pump The suction efficiency is improved and the pressure loss in the piping is reduced. Further, since the resistance reducing means and the piston pump are integrated, the space can be saved.

Further, a screw feeder is disposed at the lower part of the hopper, and the resistance reducing means connected to the terminal end of the screw feeder is a single screw pump,
Pressure detecting means for detecting the pressure in the sludge conveyance space of the single screw pump, a bypass pipe communicating with the sludge conveyance space, and an on-off valve provided in the bypass pipe and closed during normal operation ,
The on-off valve is controlled to be opened when the pressure detected by the pressure detecting means is equal to or higher than a predetermined pressure, and a part of the dewatered sludge in the sludge transport space is allowed to escape from the bypass pipe. It is characterized by.

  Thus, by interposing a uniaxial screw pump between the hopper and the piston pump and applying a shearing force to the dewatered sludge with the uniaxial screw pump, the suction efficiency of the piston pump is improved and the pressure loss in the piping Is reduced. Moreover, since the uniaxial screw pump and the piston pump are integrated, the space can be saved. Further, by adopting a single screw pump, it is possible to give a large shearing action with low power. Furthermore, when the pressure in the sludge conveyance space exceeds a predetermined pressure, excessive pressure rise in the sludge conveyance space can be avoided by letting some of the high-pressure dewatered sludge escape to the bypass piping. It is possible to extend the life of the stator.

Furthermore, a screw feeder is disposed at the lower part of the hopper, and the resistance reducing means is connected to the end of the screw feeder,
The resistance reducing means is a biaxial kneader.
As described above, the biaxial kneader is interposed between the hopper and the piston pump, and the shearing force is applied to the dewatered sludge by the clearance between the casing and the blade of the biaxial kneader, thereby improving the suction efficiency of the piston pump. , Pressure loss in the piping is reduced. Further, since the biaxial kneader and the piston pump are integrated, the space can be saved. Furthermore, since a part of the conventional screw feeder is replaced with a biaxial rotor, the apparatus configuration can be simplified.

The screw feeder includes a rotary shaft that is rotationally driven, and a ribbon screw attached to the rotary shaft or a screw having a plurality of notches on the outer periphery.
Thus, by using a ribbon screw (paddle) or a screw (paddle) having a plurality of notches on the outer peripheral edge, it is possible to improve the shearing action as compared with a conventional screw feeder.

Further, the resistance reducing means is a screw feeder provided at a lower portion of the hopper,
The screw feeder includes a rotary shaft that is rotationally driven, and a ribbon screw attached to the rotary shaft or a screw having a plurality of cutout portions on the outer periphery.
Thus, as a screw feeder interposed between the hopper and the piston pump, a ribbon type screw or a screw having a plurality of notches on the outer peripheral edge is used, thereby improving the shearing action as compared with the conventional screw feeder. This improves the suction efficiency of the piston pump and reduces the pressure loss in the piping. Furthermore, the apparatus configuration can be simplified.

Further, the resistance reducing means is a biaxial kneader provided at a lower portion of the hopper.
Thus, by providing a biaxial kneader at the lower part of the hopper and applying a shearing force to the dewatered sludge with the biaxial kneader, the suction efficiency of the piston pump is improved and the pressure loss in the piping is reduced. Further, since a biaxial kneader provided at the lower part of the hopper and the biaxial kneader for imparting a shearing force to the dewatered sludge and the piston pump are integrated, the space can be saved. Furthermore, the apparatus configuration can be simplified.
Furthermore, it is preferable that the water content of the dewatered sludge is 65 to 82%.

As described above, according to the present invention, by applying a shearing force before the dewatered sludge is transferred to the transport process, moisture in the dewatered sludge oozes out, and the pipe friction resistance and flow resistance of the dehydrated sludge are reduced. . For this reason, the suction efficiency of a pressure pump such as a piston pump can be improved, and the pressure loss in the piping can be reduced. Further, since the shear force can be efficiently applied to the entire dehydrated sludge with low power, the agitation power can be reduced, and energy saving in transportation of the dehydrated sludge piping can be achieved.
Further, by applying a shearing force using a roller before supplying dehydrated sludge to the piston pump, the pipe friction resistance and flow resistance of the dehydrated sludge are reduced, and the suction efficiency of the piston pump is improved. Furthermore, before supplying dewatered sludge to the piston pump, by applying shear force with a twin screw, single screw, ribbon screw, single screw pump, kneader, etc. The piping frictional resistance and flow resistance are reduced, the suction efficiency of the piston pump is improved, and the pressure loss in the piping is reduced. Furthermore, the apparatus for applying the shearing force can be retrofitted and is easy to maintain.
Also, by applying shear force to the dewatered sludge preliminarily with a roller, even in the case of dehydrated sludge with a low water content that is difficult to convey with a single device that applies shear force, the shear force can be efficiently applied. Can be granted.
In addition, by interposing a resistance reduction means between the hopper and the piston pump, and applying a shearing force to the dewatered sludge by the resistance reduction means, the pipe friction resistance and flow resistance of the dewatered sludge are reduced, and the suction efficiency of the piston pump is reduced. And the pressure loss in the piping is reduced. Further, since the resistance reducing means and the piston pump are integrated, the space can be saved.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

1 is a system diagram of an organic dehydrated sludge transport apparatus according to a first embodiment, FIG. 2 is a system diagram of an organic dehydrated sludge transport apparatus according to a second embodiment, and FIG. 3 is an organic dehydrated sludge transport apparatus according to a third embodiment. 4 is a system diagram of an organic dewatered sludge transport device according to Example 4, FIG. 5 is a system diagram of an organic dewatered sludge transport device according to Example 5, and FIG. 6 is an organic system according to Example 6. 7 is a system diagram of an organic dehydrated sludge transport device according to Example 7, FIG. 8 is a block diagram of an organic dewatered sludge transport device according to Example 8-1, and FIG. FIG. 10 is a block diagram of an organic dehydrated sludge transport device according to Example 8-2, FIG. 10 is a block diagram of an organic dehydrated sludge transport device according to Example 8-3, and FIG. 11 is a diagram showing a screw feeder used in Example 8. FIG. 12 is a block diagram of an organic dewatered sludge transfer device according to Example 9, and FIG. 13 is a piston pump Sectional view, FIG. 14 shows experimental data and experimental apparatus diagram showing an orifice outlet pressure of dewatering sludge according to the present invention.
In the present embodiment, as organic dewatered sludge, sludge produced from animal and plant residues, waste products, livestock excrement, etc., produced in the production process, for example, sewage sludge, sludge dewatered from septic tank sludge is used. However, it is not limited to these.

FIG. 1 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 1 of the present invention.
In FIG. 1, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, and 3 is a single screw pump. The dehydrator 1 used here uses a pressure-type dehydrator such as a vacuum dehydrator or a belt press, or a dehydrator such as a centrifugal separator, and reduces the moisture content of sludge to about 60 to 90%.
Although not shown, as a device for supplying dewatered sludge in combination with the piston pump 2, a hopper (for example, a cone shape, a pyramid shape, etc.) suspended from the axial direction of the piston pump 2 or the shaft of the piston pump 2. A screw feeder arranged in parallel with the direction, a screw conveyor for conveyance, or the like is used.

Further, the piston pump 2 is a reciprocating piston type pressure feed pump, and has a transfer cylinder 12 having a water chamber 11 formed at the rear as shown in FIG. 13, and is provided at the front of the transfer cylinder 12. The first and second transfer pistons 15 and 16 sliding in the two cylinder bodies 13 and 14 are connected to the hydraulic pistons 19 and 20 of the first and second hydraulic cylinders 17 and 18 via connecting rods 21 and 22, respectively. Are connected to each other and can be advanced and retracted alternately.
Suction valves 23 and 24 and discharge valves 25 and 26 driven by hydraulic cylinders are provided in front of the first and second transfer pistons 15 and 16, respectively. The first and second transfer pistons 15 and 16 can alternately suck and discharge alternately. As described above, even the high-viscosity dewatered sludge can be conveyed by the high-power first and second hydraulic cylinders 17 and 18.

However, since the suction portion surrounded by the broken line C in FIG. 13 has a narrow flow path, when the pipe friction resistance and flow resistance of the dewatered sludge supplied to the piston pump 2 are large, the valves provided in the suction valves 23 and 24 The dehydrated sludge sucked or discharged comes into contact with a rod (not shown) that supports the main body, and the resistance increases, and the suction efficiency decreases.
Therefore, the shear force is applied to the dewatered sludge as a whole at the front stage of the piston pump 2 to promote the exudation of moisture in the dewatered sludge, and the pipe friction resistance and flow resistance of the dewatered sludge are reduced. FIG. 17 shows the mechanism. The dewatered sludge is agglomerated by a flocculant or the like and exists as a sludge floc 100, and the space between the cells 101 of the sludge is filled with water (intercellular water) 102. When shear force and compressive force are applied to the dewatered sludge composed of the sludge floc 100, the sludge floc is destroyed and intercellular water oozes out from between the cells 101 to the surface. In the figure, reference numeral 103 denotes a destroyed sludge floc, and 102 'denotes exuded intercellular water. This exuded intercellular water 102 'promotes the action of a lubricant to reduce the viscosity of the sludge, thereby reducing the pipe friction resistance and flow resistance of the dewatered sludge.

Here, the effect of applying the shearing force of the dewatered sludge in the present invention will be described with reference to FIG. 14 is an experimental data showing the orifice outflow pressure of the dewatered sludge according to the present invention, and its experimental apparatus diagram. Using the experimental apparatus diagram shown in FIG. 14A, the dewatered sludge in the present invention was used as the test sludge 63, and the orifice outflow pressure when the sample sludge 63 was loaded and flowed out of the orifice 64 was measured. Reference numeral 65 denotes a loading platform.
As shown in the experimental data in FIG. 14B, it can be seen that the sheared and compressed dewatered sludge has a smaller orifice outflow pressure than the dewatered sludge discharged from the dehydrator outlet (blank). From this, it can be seen that by applying a shear force to the dehydrated sludge under a compacted state, the resistance viscosity of the dehydrated sludge is lowered and the flow resistance is reduced.

In the first embodiment, sludge such as sewage sludge generated at the sewage treatment plant is dehydrated to a water content of about 60 to 90% by the dehydrator 1 and supplied to the single screw pump 3 before being supplied to the piston pump 2. Is done. Since the dewatered sludge supplied to the single screw pump 3 is given a shearing force by the clearance between the casing of the single screw pump and the rotor (screw), the floc in the dewatered sludge is partially destroyed and captured by the floc. Moisture exudes to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
The single screw pump 3 is also preferably used as a relay pump between the dehydrator 1 and the piston pump 2.

FIG. 2 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 2 of the present invention.
In FIG. 2, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 4 is a kneading machine, and other configurations are the same as those of the first embodiment shown in FIG.
The kneader 4 used here is a kneader that kneads dehydrated sludge and imparts torsional shearing force, and a pressure kneader is more preferable.

  In the second embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90%, and is supplied to the kneader 4 before being supplied to the piston pump 2. The dewatered sludge supplied to the kneading machine 4 is kneaded and stirred by a kneading blade (blade) in the kneading machine 4 to give a torsional shear force. As a result, the floc in the dewatered sludge is partially destroyed, and the moisture captured by the floc oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.

FIG. 3 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 3 of the present invention.
In FIG. 3, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 5 is a roller, and other configurations are the same as those of the first embodiment shown in FIG.
The roller 5 used here may be one-stage or multi-stage as long as it applies a shearing force to the dewatered sludge. Further, it is sufficient that the roller pair has a minute gap for compacting the dewatered sludge. When the rollers are provided in multiple stages, for example, the distance between the rollers may be gradually narrowed so that the shear load increases as the rollers become downstream. In addition, it is possible to reduce the power by providing between the rollers so as to give an appropriate shearing force that destroys the flocs in the dewatered sludge.

In the third embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90%, and is supplied to the roller 5 before being supplied to the piston pump 2. Since the dewatered sludge supplied to the roller 5 is imparted with a shearing force, the flocs in the dewatered sludge are partially broken, and the water trapped in the floc oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
In addition, unlike the kneader, the roller 5 can operate without problems even if an object such as hair is easily tangled in the sludge.

FIG. 4 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 4 of the present invention.
In FIG. 4, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 5 is a roller, 6 is a conveyor for conveying the dewatered sludge discharged from the dehydrator 1, and the other configuration is the embodiment shown in FIG. 1 is the same as in FIG.
The roller 5 used here may be one or more stages as long as it imparts a suitable shearing force to the dewatered sludge as in Example 3.

  In the fourth embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90%, and is supplied to the roller 5 via the conveyor 6 before being supplied to the piston pump 2. Since the dewatered sludge supplied to the roller 5 is imparted with a shearing force, the flocs in the dewatered sludge are partially broken, and the water trapped in the floc oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.

FIG. 5 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 5 of the present invention.
In FIG. 5, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 7 is a screw conveyor for conveying the dewatered sludge discharged from the dehydrator 1, and the other configurations are the same as those of the first embodiment shown in FIG. Therefore, detailed description is omitted.

In the fifth embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90%, and is supplied to the screw conveyor 7 before being supplied to the piston pump 2. The screw conveyor 7 is provided with a narrower width as the pitch goes downstream, and conveys the dehydrated sludge discharged from the dehydrator 1 to the piston pump 2 while applying a shearing force. Note that the screw conveyor 7 can be suitably used for both two axes and one axis. A ribbon screw can also be used in the same manner.
The dewatered sludge is given a shearing force by the screw conveyor 7 so that the flocs in the dewatered sludge are partially destroyed, and the moisture trapped in the floc oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.

FIG. 6 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 5 of the present invention.
In FIG. 6, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 5 is a roller, 7 is a screw conveyor for conveying the dewatered sludge discharged from the dehydrator 1, and other configurations are shown in FIG. Since it is the same as that of Example 1, detailed description is abbreviate | omitted.
The roller 5 used here may be one stage or multiple stages as long as it imparts a suitable shearing force to the dewatered sludge as in the third embodiment.

In the sixth embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90%, and is supplied to the roller 5 via the screw conveyor 7 before being supplied to the piston pump 2. The screw conveyor 7 used here is a conveyor configured so as to reduce the pipe friction resistance and flow resistance of the dewatered sludge. For example, the screw conveyor 7 is provided with a narrower width as the pitch goes downstream. The dewatered sludge discharged from 1 is conveyed to the roller 5 while applying a shearing force. In addition, the screw conveyor 7 used here may be biaxial or uniaxial, and a ribbon screw is also preferably used.
In the dewatered sludge to which shearing force is applied by the screw conveyor 7 and the roller 5, the flocs in the dewatered sludge are partially broken, and the moisture captured by the flocks oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
In addition, although the roller 5 is provided in the latter part of the screw conveyor 7 here, the screw conveyor 7 may be provided in the latter part of the roller 5, and the same effect can be obtained.

FIG. 7 is a system diagram of an organic dewatered sludge transfer apparatus according to Embodiment 7 of the present invention.
In FIG. 7, 1 is a dehydrator for dewatering sludge, 2 is a piston pump, 5 is a roller, 3 is a uniaxial screw pump, and other configurations are the same as those of the first embodiment shown in FIG. Omitted.
The roller 5 used here may be one stage or multiple stages as long as it imparts a suitable shearing force to the dewatered sludge as in the third embodiment.

  In the seventh embodiment, the sludge is dehydrated by the dehydrator 1 to a moisture content of about 60 to 90% and supplied to the piston pump 2 via the roller 5 and the single screw pump 3. In the roller 5, a preliminary shear force is applied to the dewatered sludge before being supplied to the single screw pump 3. Thereby, even in the case of dehydrated sludge having a low water content and high viscosity that is difficult to convey with a single screw pump 3 alone, a shearing force can be efficiently applied.

  From the above, when transporting the dewatered sludge discharged from the dehydrator 1 using the piston pump 2, a single screw pump, a kneader, a roller, Although conveyors, single screw conveyors, and twin screw conveyors are used as shown in Examples 1 to 7, pipe friction resistance and flow resistance of dewatered sludge are reduced, and the suction efficiency of the piston pump is improved. In order to reduce the pressure loss in the pipe transportation, it may be used alone or in combination regardless of the above-described embodiment.

  FIGS. 8-11 shows the figure of the organic dehydrated sludge conveyance apparatus which concerns on Example 8 of this invention. Example 8 shows a configuration in which a resistance reducing means for applying a shearing force to a dewatered sludge in a compacted state and a piston pump 2 that compresses and conveys the dewatered sludge and an apparatus having a conventional auger type hopper Is applied.

(Example 8-1)
FIG. 8 is a configuration diagram of an organic dewatered sludge transport device according to Example 8-1.
The apparatus shown in FIG. 8 includes a hopper 31 that receives dehydrated sludge from the dehydrator 1 (see FIG. 1), and a screw feeder 33 is provided below the hopper 31. A uniaxial screw pump 40 is connected to the end of the screw feeder 33, and the piston pump 2 is connected to the end of the uniaxial screw pump 40.
The hopper 31 is provided with a stirrer 32 as necessary.
The screw feeder 33 includes a rotating shaft 34 that is rotationally driven by a motor 35 and a screw (paddle) 33 attached to the rotating shaft 34.
The single screw pump 40 has the same configuration as the apparatus described in the first embodiment (see FIG. 8).

  A bypass pipe 42 communicating with the sludge conveyance space 41 of the single screw pump 40 is provided, and a pressure detector 44 for detecting the pressure of the sludge conveyance space 41 is provided on the bypass pipe 42. An on-off valve 43 that forms an open state or a sealed state of the bypass pipe 42 is provided in the bypass pipe 42 on the downstream side of the pressure detector 44. The on-off valve 43 is connected to the hydraulic unit 50 and is driven by the hydraulic unit 50. The opening / closing control of the opening / closing valve 43 is performed by an electromagnetic valve 51 electrically connected to the pressure detector 44. During the normal operation, the on-off valve 43 is kept closed, and the on-off valve 43 is controlled to open when the pressure in the sludge transfer space 41 detected by the pressure detector 44 exceeds a predetermined pressure set in advance. To do.

  In Example 8-1, the dewatered sludge dehydrated to about 60 to 90% by the dehydrator 1 is put into the hopper 31 and sent to the single screw pump 40 by the screw feeder 33. The dewatered sludge supplied to the single screw pump 40 is given a shearing force by the clearance between the casing and the rotor of the single screw pump, so that the flocs in the dewatered sludge are partially broken and the moisture trapped in the floc Exudes to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.

Further, when the piston pump 2 is switched, the suction valves 23 and 24 (see FIG. 13) of the piston pump 2 are fully closed for a moment, so that an excessive pressure is applied to the stator of the single screw pump 40. In order to eliminate this, the pressure detector 44 always detects the pressure in the sludge conveyance space 41, and when the detected pressure exceeds a predetermined pressure, the on-off valve 43 is controlled to be opened, and the bypass pipe 42 allows some of the high pressure dewatered sludge to escape. As a result, an excessive increase in pressure in the sludge transfer space 41 can be avoided, and the life of the stator can be extended.
Furthermore, according to the present embodiment, the uniaxial screw pump 40 that imparts a shearing force in a compacted state to the dewatered sludge and the piston pump 2 that compresses and conveys the dewatered sludge are integrated, so that space saving can be achieved. It becomes possible. Further, by adopting the single screw pump 40, it is possible to give a large shearing action with low power.

(Example 8-2)
FIG. 9 is a diagram showing an organic dehydrated sludge conveying device according to Example 8-2, where (a) is a device configuration diagram, (b) is a plan view of a biaxial kneader, and (c) is a sectional view of (b). It is.
The apparatus shown in FIG. 9A includes a hopper 31 that receives dewatered sludge from the dehydrator 1 (see FIG. 1), and a screw feeder 33 is provided below the hopper 31. A biaxial kneader 45 is connected to the end of the screw feeder 33, and the piston pump 2 is connected to the end of the biaxial kneader 45.
The screw feeder 33 includes a rotating shaft 34 that is rotated by a motor 35 and a screw 33 attached to the rotating shaft 34.

  As shown in FIGS. 9B and 9C, the biaxial kneader 45 has two rotary shafts 34 and 34 arranged in parallel, and the rotary shaft has a predetermined pitch in the axial direction. A plurality of blades 46 are attached. The blades 46 are attached at different angles in the axial direction from adjacent coaxial blades 46. Also, adjacent blades 46 of different axes are attached with different axial circumferential angles. The two rotating shafts 34 and 34 are driven to rotate synchronously by the motor 35, whereby the blade 46 is rotated to convey the dewatered sludge in a predetermined direction.

In Example 8-2, the dewatered sludge dehydrated to a water content of about 60 to 90% by the dehydrator 1 is put into the hopper 31 and sent to the biaxial kneader 45 by the screw feeder 33. Since the dewatered sludge supplied to the biaxial kneader 45 is given a shearing force by the clearance between the casing of the biaxial kneader 45 and the blade 46, the floc in the dewatered sludge is partially broken and captured by the floc. Moisture that had been oozed out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
Furthermore, according to the present embodiment, the biaxial kneader 45 that imparts a shearing force in a compacted state to the dewatered sludge and the piston pump 2 that compresses and conveys the dewatered sludge are integrated, so that space saving can be achieved. It becomes possible. Furthermore, since a part of the conventional screw feeder 33 is replaced with the biaxial rotor 45, the apparatus configuration can be simplified.

(Example 8-3)
FIG. 10 is a configuration diagram of the organic dehydrated sludge conveying device according to Example 8-3, FIG. 11 shows a screw feeder used in Example 8, and (A) is a side view of the ribbon screw of the present example. Sectional drawing, (B) is a side view and a sectional view of a screw having a notch portion of the present embodiment, and (C) is a side view and a sectional view of a conventional screw.
The apparatus shown in FIG. 10 includes a hopper 31 that receives dewatered sludge from the dehydrator 1 (see FIG. 1), and a screw feeder 33 is provided below the hopper 31. The piston pump 2 is connected to the end of the screw feeder 33.

The screw feeder 33 includes a rotating shaft 34 that is rotated by a motor 35 and a screw 33 attached to the rotating shaft 34. As the screw feeder 33, a ribbon screw or a screw having a notch is used.
A screw feeder 33 shown in FIG. 11 (A) has a configuration including a rotating shaft 34 and a ribbon screw 36A attached to the rotating shaft 34. Since the ribbon-type screw 36A is used to have an opening near the rotating shaft 34, the outer dewatered sludge that is directly pushed by the screw 36A and the inner dehydrated sludge that is dragged and conveyed by the dewatered sludge. Since a shearing force is applied between them, it is possible to improve the shearing action as compared with the conventional screw feeder. In addition, a present Example is not limited to the shape of the ribbon type screw shown in the figure, Other shapes, such as double winding and triple winding, can also be used.

  The size of the opening of the ribbon screw 36A is preferably formed so as to have a cross-sectional ratio of 0.1 to 0.3 (cross-sectional area of sludge conveyance space / cross-sectional area of screw). By setting the cross-sectional ratio within the above range, mixing and shearing in the screw axial direction can be promoted by repeating folding and sliding motions.

A screw feeder 33 shown in FIG. 11 (B) includes a rotating shaft 34 and a screw 36B attached to the rotating shaft 34. The screw 36B has a plurality of cutout portions at a predetermined pitch on the outer periphery thereof. 37 is provided. By using the screw 36B having the notch 37, the number of shearing portions increases, and the shearing action given to the dewatered sludge can be improved.
Here, as a comparative example, FIG. 11C shows a diagram of a conventional screw feeder. The conventional screw feeder 33 includes a rotating shaft 34 and a screw 36C attached to the rotating shaft 34. The screw 36C does not have an opening near the rotating shaft 34, and Since the outer peripheral edge has a smooth spiral shape, it is efficient for conveying sludge, but the shearing force that can be applied to the dewatered sludge is not large.

In Example 8-3, the dewatered sludge dehydrated to a water content of about 60 to 90% by the dehydrator 1 is put into the hopper 31 and sent to the screw feeder 33. The dewatered sludge supplied to the screw feeder 33 is given a large shearing force by the ribbon screw 36A or the screw 36B having the notch 37, so that the floc in the dewatered sludge is partially broken and captured by the floc. Moisture exudes to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
Furthermore, according to the present embodiment, the screw feeder 33 that applies the shearing force in the compacted state to the dewatered sludge and the piston pump 2 that compresses and conveys the dewatered sludge are integrated, so that space can be saved. It becomes. Furthermore, since the configuration of the conventional screw feeder 33 is a ribbon type screw 36A or a screw 36B having a notch 37, the configuration of the apparatus can be simplified.

  Further, in this embodiment, it is preferable that the screw feeder 33 is biaxial or multiaxial, and the adjacent screws are configured to rotate in the opposite directions at a constant speed, thereby giving a large shearing action to the dewatered sludge. It is possible. In the case of the biaxial or multiaxial screw feeder 33, the sludge retention amount and residence time in the casing are adjusted by adjusting the screw mounting angle or by making a part of the screw in the sludge transport direction and the reverse feed direction. To do.

  Moreover, the screw feeder 33 shown in FIG. 11 can also be applied to the above-described Example 8-1 and Example 8-2. As described above, by combining the embodiment 8-1 or the embodiment 8-2, and the ribbon screw 36A or the screw 36B having the notch portion 37 shown in the embodiment 8-3, a larger shear is obtained. A force can be applied, and the transfer efficiency in the piston pump 2 can be greatly improved.

FIG. 12: shows the figure of the organic dehydrated sludge conveyance apparatus which concerns on Example 9 of this invention. Example 9 shows a configuration in which resistance reducing means for applying shear force to a dewatered sludge under a compacted state and a piston pump 2 for compressing and conveying the dewatered sludge are integrated, and a device having a conventional conical type hopper Is applied.
The apparatus shown in FIG. 8 includes a hopper 61 that receives dewatered sludge from the dehydrator 1 (see FIG. 1), and a biaxial kneader 70 is provided at the lower portion of the hopper 61. The piston pump 2 is connected to the lower part of the biaxial kneader 70 via a valve 66.

  The hopper 61 is formed in a funnel shape with a reduced diameter downward, and a biaxial kneader 70 is provided at the lower end thereof. A rotary shaft 62 that is driven to rotate by a motor 63 is disposed in the upper part of the hopper 61 in the vertical direction, and a plurality of stirring blades 64 are attached to the rotary shaft 62. A ribbon screw 65 is attached to the rotating shaft 62 below the stirring blade 64. The stirring blades 64 and the ribbon screw 65 are only examples, and are not limited to these as long as they are means for stirring the dewatered sludge in the hopper 61.

The biaxial kneader 70 has the same configuration as that of the apparatus shown in Example 8-2 (see FIG. 9). That is, it has two rotating shafts 71 and 71 arranged in parallel, and a plurality of blades 73 are attached to the rotating shaft at a predetermined pitch in the axial direction. The blade 46 is attached to a coaxial adjacent blade 73 at a different angle in the axial direction. Also, adjacent blades 73 of different axes are attached with different axial circumferential angles. The different-axis blades 73 include an overlap shape in which the rotation trajectories overlap and a tangential shape in which the rotation trajectories do not overlap, but either one may be used.
The two rotating shafts 71 and 71 are driven to rotate synchronously by the motor 72, whereby the blade 73 rotates, and dewatered sludge is conveyed in a predetermined direction. At this time, a difference may be made in the rotational speed of the adjacent blades 73 of different axes, thereby improving the shearing action.

In Example 9, the dewatered sludge dehydrated by the dehydrator 1 to a water content of about 60 to 90% is put into the hopper 61 and stirred by the stirring means. Since the dewatered sludge that has been gravity settled in the hopper 61 is given a shearing force by the lower biaxial kneader 70, the flocs in the dewatered sludge are partially broken, and the water trapped in the flocs oozes out to the surface. Thereby, piping friction resistance and flow resistance of dewatered sludge in the piston pump 2 are reduced, suction efficiency is improved, and pressure loss in piping transportation can be reduced.
Furthermore, according to the present embodiment, the biaxial kneader 70 that imparts a shearing force in a compacted state to the dewatered sludge and the piston pump 2 that compresses and conveys the dewatered sludge are integrated, so that space saving can be achieved. It becomes possible. Furthermore, since the biaxial kneader 70 is attached to the lower part of the conventional hopper 61, the apparatus configuration can be simplified.

  Moreover, in above-mentioned Example 1- Example 9, it is preferable that the dehydration sludge conveyed with an organic dehydration sludge conveyance apparatus is a dehydration sludge with a moisture content of 65 to 82%. This is because if the moisture content is less than 65%, the concentration of dewatered sludge is too high, making it difficult to smoothly operate the resistance reducing means for applying shearing force, while the moisture content is higher than 82%. Since the dehydrated sludge already has a certain degree of fluidity, the effect of this embodiment does not appear remarkably. Therefore, by setting the moisture content of the dehydrated sludge to be transported to 65 to 82%, resistance reduction means It is possible to operate stably, and the transfer efficiency of dewatered sludge can be greatly improved by applying a shearing force by the resistance reducing means.

  According to the present invention, a shear force is efficiently applied to the entire dewatered sludge, the suction efficiency of the pump is improved, and the pressure loss during the dewatered sludge pumping is reduced. This is useful for application to the device.

It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 1. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 2. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 3. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 4. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 5. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 6. FIG. It is a systematic diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 7. FIG. It is a block diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 8-1. It is a figure which shows the organic dehydration sludge conveying apparatus which concerns on Example 8-2, (a) is an apparatus block diagram, (b) is a top view of a biaxial kneader, (c) is sectional drawing of (b). It is a block diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 8-3. The screw feeder used for Example 8 is shown, (A) is the side view and sectional drawing of the ribbon type screw of a present Example, (B) is the side view and sectional view of the screw which has a notch part of a present Example, ( C) is a side view and a cross-sectional view of a conventional screw. It is a block diagram of the organic dehydration sludge conveyance apparatus which concerns on Example 9. FIG. It is sectional drawing of the piston pump which concerns on this invention. It is an experimental data which shows the orifice outflow pressure of the dewatered sludge which concerns on this invention, and its experimental apparatus figure. It is a systematic diagram of the conventional organic dehydration sludge conveyance apparatus. It is a figure which shows the conventional organic dehydrated sludge conveyance apparatus typically. It is a schematic diagram which shows the viscosity reduction mechanism by the shear of dewatered sludge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dehydrator 2 Piston pump 3 Single screw pump 4 Kneading machine 5 Roller 7 Screw conveyor 31, 61 Hopper 33 Screw feeder 34 Rotating shaft 36 Screw 42 Bypass piping 43 On-off valve 44 Pressure detector 40 Single screw pump 45, 70 Twin screw kneader

Claims (19)

In the method of transporting organic dewatered sludge dehydrated to 60-90% water content by a dehydrator,
Before the dewatered sludge is transferred to the conveying step, the dehydrated sludge is subjected to a shearing force under a compacted state and promotes the exudation of moisture in the dehydrated sludge, whereby the pipe friction resistance and flow resistance of the dehydrated sludge are increased. A method for transporting organic dewatered sludge, characterized in that it is compressed and transported in a reduced state.   The method for transporting organic dehydrated sludge according to claim 1, wherein the organic dehydrated sludge is an aggregate of a large number of cells after biological treatment.   The shearing force is imparted to the dewatered sludge by rolling between a pair of rollers provided at the outlet of the dehydrator or the belt conveyor and having a minute gap between which the sludge is compacted. The method for transporting organic dehydrated sludge according to claim 1.   Giving shear force to the dewatered sludge is provided on the dehydrator outlet or the belt conveyor outlet side, rolling between a screw pair of a twin screw, rolling of a single screw, rolling of a ribbon screw, single screw 2. The method for transporting organic dewatered sludge according to claim 1, wherein the method is carried out by rolling a rotor of a pump or kneading motion of a kneader.   The dewatered sludge is given a shearing force by rolling between the pair of rollers, and then given a shearing force by at least one of a twin screw, a single screw, a ribbon screw, a single screw pump, or a kneader. The method for transporting organic dehydrated sludge according to any one of claims 1 to 4.   The method for transporting organic dehydrated sludge according to any one of claims 1 to 5, wherein the moisture content of the dehydrated sludge is 65 to 82%. In the organic dehydrated sludge transporting device for transporting the organic dehydrated sludge dehydrated to a water content of 60 to 90% by a dehydrator through a compacted transport body including a piston pump,
By applying a shearing force to the dewatered sludge in a compacted state between the dewatering machine outlet or the belt conveyor outlet side and the compacted transport body including the piston pump to promote the exudation of moisture in the dewatered sludge. An organic dewatered sludge transporting apparatus comprising a resistance reducing means for compressing and transporting the dewatered sludge in a state where the pipe friction resistance and flow resistance are reduced.   The organic dehydrated sludge conveying apparatus according to claim 7, wherein the organic dehydrated sludge is an aggregate of a large number of cells after biological treatment.   8. The organic dehydrated sludge transport device according to claim 7, wherein the resistance reducing means is performed by rolling between a pair of rollers having a minute gap in which sludge is compacted between the pair of rollers.   The resistance reducing means is provided at the outlet of the dehydrator or the belt conveyor, and rolls between a pair of screws of a twin screw, rolling of a single screw, rolling of a ribbon screw, rolling of a rotor of a single screw pump. The apparatus for transporting organic dewatered sludge according to claim 7, wherein the apparatus is carried out by movement or kneading movement of a kneader.   8. The resistance reduction means is formed by providing at least one of a roller, a twin screw, a single screw, a ribbon screw, a single screw pump, or a kneading machine that applies the shear force in series. The organic dehydrated sludge conveying apparatus according to any one of Items 10 to 10.   At least one of the twin screw, the single screw, the ribbon screw, the single screw pump or the kneading machine according to claim 10 or claim 11 is an apparatus for supplying organic dehydrated sludge to a compacted carrier including the piston pump. Organic dewatered sludge transport device characterized by A hopper for receiving the dewatered sludge is provided on the inlet side of the piston pump,
Between the hopper and the piston pump, the dewatering sludge is pushed from the hopper into the piston pump, and the resistance reducing means for applying a shearing force to the dewatered sludge under a compacted state is interposed, and the piston pump and the resistance 8. The organic dewatered sludge conveying apparatus according to claim 7, wherein the reducing means is integrated. A screw feeder is disposed at the lower part of the hopper, and the resistance reducing means connected to the terminal end of the screw feeder is a single screw pump,
Pressure detecting means for detecting the pressure in the sludge conveyance space of the single screw pump, a bypass pipe communicating with the sludge conveyance space, and an on-off valve provided in the bypass pipe and closed during normal operation ,
The on-off valve is controlled to be opened when the pressure detected by the pressure detecting means is equal to or higher than a predetermined pressure, and a part of the dewatered sludge in the sludge transport space is allowed to escape from the bypass pipe. The organic dehydrated sludge transfer apparatus according to claim 13. A screw feeder is disposed at a lower portion of the hopper, and the resistance reducing means is connected to an end of the screw feeder;
14. The organic dewatered sludge transfer apparatus according to claim 13, wherein the resistance reducing means is a biaxial kneader.   16. The screw feeder includes: a rotary shaft that is rotationally driven; and a ribbon screw attached to the rotary shaft or a screw having a plurality of notches on an outer peripheral edge. Organic dewatered sludge transport device. The resistance reducing means is a screw feeder provided at the lower part of the hopper,
14. The organic material according to claim 13, wherein the screw feeder includes a rotary shaft that is rotationally driven, and a ribbon screw attached to the rotary shaft or a screw having a plurality of notches on the outer periphery. Equipment for dehydrated sludge.   14. The organic dewatered sludge carrying device according to claim 13, wherein the resistance reducing means is a biaxial kneader provided at a lower portion of the hopper.   19. The organic dehydrated sludge carrying device according to claim 7, wherein the moisture content of the dehydrated sludge is 65 to 82%.

Images