JP4754282B2 - Bucket type sludge volume reducer and bucket lifting device - Google Patents

Description

The present invention relates to a sludge volume reducer, and more particularly to a bucket type sludge volume reducer that reduces the volume of sludge stored in a bucket.
Furthermore, the present invention relates to a bucket lifting device for lifting and tilting a bucket of a bucket type sludge volume reducing machine.

Conventionally, a bucket type sludge volume reducing machine that reduces the volume of sludge contained in a bucket is known. FIG. 5 is a schematic view showing an example of a conventional bucket sludge volume reducer.
As shown in FIG. 5, the bucket sludge volume reducing machine 100 forms an air circulation path together with a bucket 104 having a lower opening 104 a and an upper opening 104 b for aeration for drying the stored sludge W, and the bucket 104. A duct 106 connected to the lower opening 104a and the upper opening 104b of the bucket, a fan 108 for circulating the air in the air circulation path, and an air in the duct 106 sent to the bucket 104 by the fan 108 Heat pump device 110 and a heat pump chamber 112 for housing the heat pump device.
In the bucket type sludge volume reducing machine 100, the air dried by the heat pump device 110 is sent into the bucket 104 by the blower 108. The dried air takes in the moisture of the sludge W stored in the bucket 104, thereby reducing the volume of the sludge W. The air that has taken in moisture returns to the duct 106, is circulated, and is dried again by the heat pump device 110.
In addition, the bucket type sludge volume reduction machine mentioned above is known, for example, from WATROPE, and volume reduction machines using a heat pump are disclosed in, for example, Patent Documents 1 and 2.

Japanese Unexamined Patent Publication No. 55-8867 JP 2002-361198 A

When the conventional bucket type sludge volume reducing machine 150 is continuously operated, the temperature in the heat pump chamber 112 rises, and the temperature of the refrigerant in the heat pump device 110 may become too high. Thereby, the volume reduction efficiency of the bucket-type sludge volume reduction machine 150 is deteriorated.
Moreover, the bucket type sludge volume reducing machine 150 is often installed outdoors. In this case, when the winter air temperature is low, the temperature of the refrigerant in the heat pump device 110 becomes too low and the gas pressure of the refrigerant does not increase, and as a result, the volume reduction efficiency of the bucket type sludge volume reducing machine 150 becomes very poor. In some cases, the bucket sludge volume reducer 150 itself may not operate.
In addition, it takes time to take out the sludge W after volume reduction from the bucket 104.

Accordingly, a first object of the present invention is to provide a bucket type sludge volume reducing machine capable of improving the volume reduction efficiency.
A second object of the present invention is to provide a bucket lifting device that makes it easy to take out sludge after volume reduction from the bucket.

  In order to achieve the first object, a bucket-type sludge volume reducing machine according to the present invention is a bucket-type sludge volume reducing machine that reduces the volume of sludge stored in a bucket, and has a ventilation mechanism that reduces the volume of stored sludge. A bucket having a lower opening and an upper opening, a duct connected to the upper opening and the lower opening so as to form an air circulation path with the bucket, and a blower for circulating the air in the air circulation path, A heat pump device for drying the air in the duct sent to the bucket by the blower, and a heat pump chamber that houses the heat pump device. The heat pump device includes a refrigerant that is an evaporation unit, a compression unit, a condensation unit, and an expansion unit. The refrigerant circulation path that circulates in order, the evaporating unit cools the air flowing from the bucket into the duct and removes moisture from the air, and the condensing unit removes moisture from the air The temperature was increased to dry the air, further characterized by having a fan provided in the heat pump chamber to cool the refrigerant between the expansion portion and the condensing unit.

In the bucket-type sludge volume reducing machine configured as described above, the air in the air circulation path flows, for example, from the lower opening of the bucket through the bucket to the duct from the upper opening. In this case, when dry air is supplied from the lower opening of the bucket 4 by a blower, the air absorbs moisture in the sludge. Thereby, sludge is reduced. The air that has absorbed the moisture is delivered from the upper opening of the bucket. In the cooling section of the duct, the air that has absorbed moisture is cooled to remove the moisture. Next, the air from which moisture has been removed is heated in the drying section of the duct to become dry air. Dry air is again supplied from the lower opening of the bucket by a blower and circulated.
Moreover, when the temperature of a refrigerant | coolant rises and the volume reduction efficiency of a sludge volume reduction machine falls, the volume reduction efficiency of a sludge reduction container can be improved by lowering | hanging the temperature of a refrigerant | coolant with a fan.

In the embodiment of the present invention, preferably, further, a first temperature sensor for detecting a temperature of the refrigerant between the aggregation portion and the expansion valve, a controller connected to the first temperature sensor and the fan, And the controller operates the fan in accordance with the temperature detected by the first temperature sensor.
In the bucket type sludge volume reducing machine configured in this way, when the temperature of the refrigerant is higher than the desired temperature, the temperature of the refrigerant can be quickly brought close to the desired temperature, so that the volume reduction efficiency can be further improved. Can do.

In the said embodiment, Preferably, a heat pump chamber accommodates a bucket, the whole duct, and an air blower further.
In the bucket-type sludge volume reducing machine configured as described above, not only the heat pump device but also the bucket, the entire duct and the blower are accommodated in the heat pump chamber, so the entire air circulation path is accommodated in the heat pump chamber, and the air circulation path A space is formed between the outside air and the outside air. As a result, the influence of disturbance that causes a temperature change in the air circulation path is reduced, the operation of the heat pump device is stabilized, and the volume reduction efficiency can be further improved.

In the embodiment of the present invention, preferably, the duct has an opening communicating with the heat pump chamber and a damper device for opening and closing the opening in a portion where the air whose temperature has been raised by the condensing unit circulates.
In the bucket type sludge volume reducer configured as described above, at the start of operation when the outside air temperature is low, the temperature of the heat pump chamber and the refrigerant is lowered and the gas pressure of the refrigerant is lowered, but the damper device is operated. By opening the opening, the air whose temperature has been increased by the condensing part flows into the heat pump chamber, and the temperatures of the heat pump chamber and the refrigerant are increased at an early stage. As a result, a decrease in the gas pressure of the refrigerant in the refrigerant circuit is prevented, and the volume reduction efficiency of the bucket sludge volume reducer can be improved.

In the above-described embodiment, preferably, the apparatus further includes a second temperature sensor that detects the temperature in the heat pump chamber, and a controller connected to the second temperature sensor and the damper device. The damper device is operated according to the temperature detected by the temperature sensor.
In the bucket type sludge volume reducing machine configured in this way, when the temperature of the refrigerant is lower than the desired temperature, the temperature of the refrigerant can be quickly brought close to the desired temperature, thereby further improving the volume reduction efficiency. Can do.

In an embodiment of the present invention, preferably the bucket has an arm receiver that is supported by an arm of a lifting device for lifting and tilting the bucket to facilitate removal of sludge therein.
In the bucket type sludge volume reducing machine configured as described above, the bucket is lifted and inclined by the bucket lifting device, so that the sludge can be easily taken out from the bucket.

  In order to achieve the first object of the present invention, a bucket-type sludge volume reducing machine according to the present invention is a bucket-type sludge volume reducing machine that reduces the volume of sludge stored in a bucket, and reduces the stored sludge. A bucket having a lower opening and an upper opening for storing air, a duct connected to the upper opening and the lower opening of the bucket so as to form an air circulation path together with the bucket, and circulating air in the air circulation path , A heat pump device for drying the air in the duct sent to the bucket by the blower, and the heat pump device have a refrigerant circulation path through which the refrigerant circulates in the order of the evaporation unit, the compression unit, the condensation unit, and the expansion unit The evaporating unit cools the air flowing into the duct from the bucket and removes moisture from the air, the condensing unit raises the temperature of the air from which the moisture has been removed, and dries the air. In part the air temperature was increased by condensation section is circulated, the opening communicating with heat pump chamber is characterized by having a damper device for opening and closing the opening.

  In order to achieve the first object of the present invention, a bucket-type sludge volume reducing machine according to the present invention is a bucket-type sludge volume reducing machine that reduces the volume of sludge stored in a bucket, and reduces the stored sludge. A bucket having a lower opening and an upper opening for storing air, a duct connected to the upper opening and the lower opening of the bucket so as to form an air circulation path together with the bucket, and circulating air in the air circulation path , A heat pump device for drying the air in the duct sent to the bucket by the blower, and the heat pump device have a refrigerant circulation path through which the refrigerant circulates in the order of the evaporation unit, the compression unit, the condensation unit, and the expansion unit The evaporating unit cools the air flowing into the duct from the bucket to remove moisture from the air, and the condensing unit raises the temperature of the air from which moisture has been removed to dry the air, Duct, fan and a heat pump apparatus is characterized in that accommodated in the housing.

In order to achieve the second object of the present invention, a bucket lifting device according to the present invention is a bucket lifting device for lifting and tilting a bucket of a bucket-type sludge volume reducing machine. Two struts extending upward, an arm attached to each of the struts so as to be able to rotate between a horizontal position and a vertical position around the pivot axis of the strut, and an arm between the horizontal position and the vertical position An arm driving device for moving the arm driving device, wherein the arm is inserted into a hole extending in a horizontal direction provided in a bucket of the bucket-type sludge volume reducing machine having an upper opening.
In the bucket lifting device configured as described above, the arm is inserted into the hole extending in the horizontal direction of the bucket by moving the bucket toward the arm of the bucket lifting device. When the arm is moved from the horizontal position to the vertical position by the arm driving device, the bucket rotates while being lifted, and the opening of the bucket becomes sideways. Thereby, it becomes easy to take out the sludge after volume reduction from a bucket.

According to the present invention, the volume reduction efficiency of the bucket-type sludge volume reducing machine can be improved.
Further, according to the present invention, it is possible to provide a bucket lifting device that makes it easy to take out sludge after volume reduction from the bucket.

Hereinafter, an embodiment of a sludge volume reducing machine according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional side view of a bucket sludge volume reducer according to the present invention. FIG. 2 is a schematic front view of a bucket-type sludge volume reducing machine according to the present invention.
As shown in FIGS. 1 and 2, the bucket-type sludge volume reducing machine 1 has a housing 2, a lower opening 4 a and an upper opening 4 b for storing the sludge W and for venting to reduce the volume of the stored sludge W. The bucket 4, the duct 6 connected to the lower opening 4a and the upper opening 4b of the bucket 4 so as to form an air circulation path together with the bucket 4, the blower 8 for circulating the air in the air circulation path, and the blower 8 And a heat pump device 10 for drying the air in the duct 6 sent into the bucket 4. The bucket 4, the duct 6, the blower 8, and the heat pump device 10 are accommodated in a space 12 in the housing 2, and this space 12 also functions as a heat pump chamber 12 that accommodates the heat pump device 10. In the present embodiment, the blower 8 constitutes a part of the duct 6, and the air circulation path is constituted by the bucket 4, the duct 6 and the blower 8. The air in the air circulation path circulates in the direction of arrow A, that is, from the lower opening 4a of the bucket 4 through the bucket 4 toward the upper opening 4b, through the duct 6 and the blower 8, It flows again to the lower opening 4a of the bucket 4.

  The bucket 4 has a bucket body 4c, four wheels 4d attached to the bucket body 4c, and a handle 4e, and is movable separately from the duct 6. Further, the housing 2 has a door 2 a for taking in and out the bucket 4 on the handle 4 e side of the bucket 4. Hereinafter, the direction extending from the handle 4e to the opposite side is referred to as the longitudinal direction, the handle 4e side is referred to as the front side, and the opposite side is referred to as the back side. The bucket 4 can be arranged in the housing 2 by pushing it from the near side to the far side.

  The bucket body 4c has a hopper chamber 14 for storing sludge and an air chamber 16 disposed below the hopper chamber 14, and the hopper chamber 14 and the air chamber 16 are partitioned by a sludge receiving plate 18. ing. The upper opening 4b of the bucket 4 is also an opening for receiving the sludge W into the hopper chamber 14, and is constituted by an edge 4f on the upper surface of the bucket. The lower opening 4a of the bucket 4 is formed so as to communicate with the air chamber 16 on the side wall 4g on the back side constituting the hopper body 4c. The rear side wall 4g is preferably inclined so that the hopper chamber 14 expands upward in order to facilitate the removal of the sludge W after volume reduction. The sludge receiving plate 18 has a large number of holes 20 that are large enough to prevent the sludge W from falling in order to ensure ventilation between the air chamber 16 and the hopper chamber 14. Further, the bucket body 4c has holes 4h extending in the longitudinal direction in the side walls 4i on both sides for inserting an arm 88 of a bucket lifting device 80 described later.

  The duct 6 includes a duct body 6a, an inlet connection portion 6b for connecting one end portion of the duct body 6a to the upper opening 4b of the bucket 4, and the other end portion of the duct body 6a at the lower opening 4a of the bucket 4. And an outlet connection part 6c for connecting to the cable. In this embodiment, the duct main body 6 a and the inlet connection portion 6 b are directly connected, and the blower 8 is disposed between the duct main body 6 a and the outlet connection portion 6 c, and the blower 8 constitutes a part of the duct 6. .

  The inlet connecting portion 6b includes a lid 22 that covers the upper opening 4b of the bucket 4, a lid driving device 24 that moves the lid 22 up and down, and an inlet that can be vertically expanded and contracted to connect the lid 22 and the duct body 6a. And a duct 26. The lid 22 can be moved by a lid driving device 24 between a lower position 22a pressed against the edge 4f on the upper surface of the bucket 4 and an upper position 22b that is spaced upward from the lower position 22a. The lid driving device 24 is configured by, for example, air cylinders arranged at the four corners of the lid 22. The inlet duct 26 is made of, for example, a bellows-like member in order to cope with the vertical movement of the lid 22. The lower surface 22c of the lid 22 is preferably provided with a sealing member 28 such as urethane packing in order to improve the sealing performance between the lid 22 and the edge portion 4f of the upper surface of the bucket 4.

  The outlet connection portion 6 c has an outlet duct 30 that is coupled to the lower opening 4 a of the bucket 4. The bucket 4 is pressed by the bucket pressing device 32 toward the back so that the lower opening 4a and the outlet duct 30 of the outlet connecting portion 6c are hermetically connected. The bucket pressing device 32 is movable between a bracket 34 that protrudes downward from the bottom surface 4j of the bucket 4, a pressing position 36a that presses the bracket 34 to the back side, and a relief position 36b that is positioned below the bracket 34. The push member 36 includes a push member 36 and a push member drive unit 38 that moves the push member 36 between a pressing position 36a and a relief position 36b. In this embodiment, the push member 36 has one end that engages with the bracket 34 and the other end that is pivotally attached to the installation surface of the sludge volume reducer 1. Further, the push member driving portion 38 is pivotally attached to one end portion that is pivotably attached to the installation surface on the near side of the push member 36 and the one end portion of the push member 36. An air cylinder having the other end.

  The duct body 6a extends from the upper front side of the bucket 4 to the back side, and then extends downward. The duct main body 6a is located on the downstream side of the duct inlet 6b and has a filter 40 for removing the dust of the sludge W carried by the air flowing into the duct 6 from the upper opening 4b of the bucket 4, and the downstream side of the filter 40 The cooling unit 42 that cools the air flowing into the duct from the bucket 4 and removes moisture from the air, and raises the temperature of the air that is located downstream of the cooling unit 42 and from which moisture has been removed to increase the air And a drying unit 44 for drying the water. The filter 40 is, for example, an air conditioning filter formed of polyester. The cooling unit 42 is provided with a drain 46 for discharging the removed moisture to the outside.

  The heat pump device 10 has a refrigerant circulation path 58 in which the refrigerant circulates in the direction of arrow B in the order of the evaporation unit 50, the compression unit 52, the condensing unit 54 and the expansion unit 56. In the present embodiment, the evaporation unit 50 is configured by a cooling coil for cooling the air in the cooling unit 42 of the duct 6, the compression unit 52 is configured by a compressor, and the condensing unit 54 is a drying unit of the duct 6. 44 is constituted by a condensing coil for warming air, and the expansion part 56 is constituted by an expansion valve. The refrigerant is, for example, HFC (R134, R407C) or HCFC (R22). A portion 58a of the refrigerant circulation path 58 extending from the condensing unit 54 to the expansion unit 56 passes through the vicinity of the housing 2 and includes a first temperature sensor 60 that detects the temperature of the refrigerant. A fan 62 is provided in the housing 2 near the portion 58 a of the refrigerant circulation path 58. The first temperature sensor 60 and the fan 62 are connected to the controller 64. The controller 64 can control, for example, the rotational speed of the fan 62 based on a signal from the first temperature sensor 60.

  At the outlet portion 6c of the duct 6 through which the air whose temperature has been raised by the condensing part 54 of the heat pump device 10 circulates, there is an opening 66 that communicates the inside of the duct 6 with the space 12, and a damper device for opening and closing the opening. 68. The damper device 68 includes a damper 70 and a damper driving device 72, and the damper 70 has an open position 70 a that connects the inside of the duct 6 and the space 12, and a closed position 70 b that blocks the inside of the duct 6 from the space 12. Can be moved by a damper driving device 72. The damper drive device 72 is, for example, an electromagnetic actuator or an air cylinder. Further, a second temperature sensor 74 for detecting the temperature of the air in the space 12 is disposed near the inlet connection portion 6b. The damper driving device 72 and the second temperature sensor 74 are connected to a controller 64, and the controller 64 can operate the damper driving device 72 based on a signal from the second temperature sensor 74.

FIG. 3 is a schematic side view of a bucket lifting device for lifting and tilting the bucket 4 separated from the duct 6.
The bucket lifting device 80 is rotated between a horizontal position 88a and a vertical position 88b around a pivot 86 of each support 84, a base 82 installed on the ground, two supports 84 extending upward from the base 72, and a pivot 86 of each support 84. It has two arms 88 which are attached to the pivot 86 as possible, and a hydraulic cylinder 90 which is an arm driving device for rotating the arms 88 between a horizontal position 88a and a vertical position 88b. In this embodiment, a span 92 is connected between two arms 88, and a hydraulic cylinder 90 is interposed between the span 92 and the base 82. The arm 88 is in a horizontal position 88a extending in the horizontal direction when the hydraulic cylinder 90 is contracted, and is in a vertical position 88b extending upward when the hydraulic cylinder 90 is extended. When the arm 88 is in the horizontal position 88a, the arm 88 can be inserted into the hole 4h of the bucket 4 by moving the bucket 4. The hole 4 h of the bucket 4 constitutes an arm receiving portion supported by the arm 88.

Next, the operation of the sludge volume reducing machine according to the present invention will be described.
Sludge W to be dried is put into the bucket 4, the bucket 4 is put into the housing 2 from the door 2a of the housing 2, and the door 2a is closed. The air cylinder 38 of the bucket pressing device 32 is operated to press the lower opening 4 a of the bucket 4 against the outlet duct 30 of the duct 6. Further, the lid driving device 24 is operated to press the lid 22 against the edge 4 f on the upper surface of the bucket 4. Thereby, the air circulation path comprised by the bucket 4, the duct 6, and the air blower 8 is comprised.
Next, the blower 8 and the heat pump device 10 are operated. When the dried air is supplied from the lower opening 4a of the bucket 4 by the blower 8, the air absorbs the moisture of the sludge W. Thereby, sludge is reduced. The air that has absorbed the moisture is sent out from the upper opening 4 b of the bucket 4. After the dust of the sludge W in the air that has absorbed moisture is removed by the filter 40, the air is cooled in the cooling section 42 of the duct 6 to remove the moisture. The removed moisture is discharged from the drain 46. Next, the air from which moisture has been removed is warmed in the drying section 44 of the duct 6 to obtain dry air. The dried air is supplied again from the lower opening 4 a of the bucket 4 by the blower 8. Since air circulates in the air circulation path, odor generated by sludge is difficult to leak to the outside.

  In the evaporation section 50 of the refrigerant circulation path 58, the refrigerant evaporates by exchanging heat with the air in the cooling section 42 of the duct 6, and the air in the cooling section 42 of the duct 6 is Cooled as it did. The evaporated refrigerant is pressurized by the compressor 52, and the temperature rises. The refrigerant whose temperature has risen is liquefied by exchanging heat with the air in the drying unit 44 of the duct 6 in the condensing unit 54, and the temperature of the air in the drying unit 44 of the duct 6 is as described above. To rise and dry the air. The liquefied refrigerant is decompressed in the expansion part and returns to the evaporation part 50 again.

When the volume reduction of the sludge is completed, the door 2a of the housing 2 is opened and the bucket 4 is pulled out from the housing 2. Specifically, by operating the lid driving device 24, the lid 22 is moved from the lower position 22a to the upper position 22b, and by operating the pushing member driving device 38, the pushing member 36 is moved from the pushing position 36a to the escape position 36b. Then, the bucket 4 is pulled out from the housing 2.
Next, the hole 4h of the bucket 4 and the arm 88 of the bucket lifting device 80 are aligned, the bucket 4 is moved toward the arm 88, and the arm 88 is inserted into the hole 4h of the bucket. Next, the hydraulic cylinder 82 is operated to rotate the arm 78 from the horizontal position 88a to the vertical position 88b. Thereby, the wall 4g on the back side of the bucket 4 comes to be positioned below. The sludge W after volume reduction is transferred from the bucket 4 to a drum can or a flexible container (bag) R (see FIG. 3).

  When the sludge volume reducing machine 1 is continuously operated, the temperature of the space 12 in the housing rises and the temperature of the refrigerant also rises due to the heat generated by the compressor 52 and the blower 8. When the controller 64 detects by the first temperature sensor 60 that the temperature of the refrigerant in the portion 58a of the refrigerant circulation path 58 between the aggregation portion 54 and the expansion portion 56 has risen above a predetermined value, the fan 62 is turned on. Actuated by controller 64. Thereby, the refrigerant in the portion 58a of the refrigerant circulation path 58 is cooled by the outside air. The rotational speed of the fan 62 may be controlled according to the difference between the refrigerant temperature and a predetermined temperature. For example, when the temperature difference is large, the rotation of the fan 62 is accelerated.

  Further, at the start of operation when the outside air temperature is low, the temperature of the space 12 in the housing and the temperature of the refrigerant are low, and the gas pressure of the refrigerant is also low. When the controller 64 detects that the temperature in the space 12 is lower than the predetermined temperature by the temperature sensor 74, the damper device 68 is operated by the controller 64, and the damper 70 is moved from the closed position 70b to the open position 70a. The warmed air flows into the space 12 in the housing 2 by the blower 8, and the inside of the housing is warmed early, and the temperature of the refrigerant also rises. As a result, a decrease in the gas pressure of the refrigerant in the refrigerant circuit 58 is prevented. In order to maintain the thermal cycle in the refrigerant circuit, the damper 70 is preferably opened and closed intermittently.

  In one embodiment, the temperature of the air is 30 to 45 ° C. and the humidity is 100 to 15% before passing through the cooling part 42 of the duct 6, and the temperature of the air is 10 to 20 ° C. after passing through the cooling part 42 of the duct 6. The humidity was 90 to 95%, and the air temperature was 50 ° C. and the humidity was 10% after passing through the drying section 44 of the duct 6.

  FIG. 4 is a graph showing an example of a temporal change in the amount of sludge removed by the bucket sludge volume reducer according to the present invention. The sludge used was a sludge treated with rinsing water after copper was etched using a treatment liquid containing iron chloride, hydrochloric acid, a polymer flocculant, and the like. Sludge used was primarily dehydrated with a filter press. As shown in FIG. 4, water was continuously removed from the sludge, and about 20 kg of sludge at the start became about 10 kg after 10 hours and about 7 kg after 20 hours. Moreover, the moisture content of the sludge which was about 70% before drying became about 25% after volume reduction.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims. Needless to say, these are also included within the scope of the present invention.
In the above embodiment, the blower 8 is disposed between the duct body 6a and the outlet connection portion 6c to reduce the pressure loss of the air sent to the bucket 4 and facilitate the maintenance of the blower 8. As long as the air in the path can be circulated, it may be arranged at any location of the duct 6.
Moreover, in the said embodiment, although the dry air was supplied toward the upper opening 4b from the lower opening 4a of the bucket 4, if the sludge in the bucket 4 is reduced in volume, the upper opening 4b of the bucket 4 will be lower than the lower opening 4a. You may supply the air which dries toward. In this case, it is preferable to change the arrangement position of the opening 66 for communicating the inside of the duct 6 and the space 12 and the damper device 68 for opening and closing the opening in accordance with the air flow in the air circulation path.
In the above embodiment, the space (heat pump chamber) 12 in the housing 2 accommodates all of the bucket 4, the duct 6, the blower 8, and the heat pump device 10, but the heat pump device 10 and the portion of the duct 6 related thereto are included. Other components may be outside the heat pump chamber 12 as long as they are accommodated.

1 is a schematic cross-sectional side view of a bucket sludge volume reducer according to the present invention. It is a schematic front view of the bucket type sludge volume reducing machine by this invention. It is a schematic side view of a bucket lifting device for lifting and tilting a bucket separated from a duct. It is a graph which shows an example of the time change of the dewatering amount of the sludge by the bucket type sludge volume reduction machine by this invention. It is a schematic side view of the bucket type sludge volume reduction machine of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bucket-type sludge volume reduction machine 4 Bucket 4a Lower opening 4b Upper opening 6 Duct 8 Blower 10 Heat pump apparatus 12 Space (heat pump room)
50 Evaporator 52 Compressor 54 Condenser 56 Expander 58 Refrigerant Circulation Path 60 First Temperature Sensor 62 Fan 64 Controller 66 Opening 68 Damper Device 74 Second Temperature Sensor 80 Bucket Lifting Device 82 Base 84 Post 86 Axis 88 Arm 88a Horizontal position 88b Vertical position W Sludge

Claims (1)

A bucket-type sludge volume reduction machine that reduces the volume of sludge contained in a bucket,
A bucket having a lower opening and an upper opening for venting to reduce the volume of stored sludge;
A duct connected to the upper and lower openings of the bucket to form an air circulation path with the bucket;
A blower for circulating air in the air circulation path;
A heat pump device for drying the air in the duct sent to the bucket by the blower;
A heat pump chamber that houses the bucket, the entire duct, the blower, and the heat pump device;
The heat pump device has a refrigerant circulation path in which a refrigerant circulates in the order of an evaporation unit, a compression unit, a condensing unit, and an expansion unit, and the evaporation unit cools air flowing into the duct from the bucket and moisture from the air The condensation unit increases the temperature of the air from which moisture has been removed to dry the air,
The duct has an opening communicating with the heat pump chamber and a damper device for opening and closing the opening in a portion where the air whose temperature has been raised by the condensing unit circulates. Bucket sludge Volume reduction machine.

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