JP6789261B2 - Concentrator, belt press type dehydrator, and belt type dehydrator - Google Patents

Description

The present invention includes a belt press type dehydrator for dehydrating an object to be treated such as sludge, a concentrator arranged in front of the belt type dehydrator to concentrate the object to be processed, and a belt press provided with such a concentrator. It relates to a type dehydrator and a belt type dehydrator.

As such a concentrator, for example, in Patent Document 1, a filter cylinder is housed in an outer cylinder, a screw is rotatably housed inside the filter cylinder, and the screw is rotationally driven to drive a sludge coagulation tank. While transporting the agglomerated sludge introduced into the filter tube, the moisture contained in the agglomerated sludge is passed through the filtration surface of the filter tube and discharged as a separation liquid to concentrate the sludge, and the concentrated sludge is concentrated. It describes what is discharged from the inside of the filter tube by the discharge pump.

Further, Patent Document 2 is a concentrator that concentrates by gravity filtering while transporting sludge on the upper surface of the filter, extending in a direction intersecting the sludge transport direction by the filter, and filtering the sludge by its rotation. A screw that moves in a direction intersecting the transport direction by the body and a control unit that controls the rotation speed of the screw according to the amount of sludge transported by the filter body are described.

The object to be treated such as sludge concentrated by such a concentrator is supplied between a pair of dewatering filter cloths wound around a roll and is sandwiched between the dewatering filter cloths. A dehydrator such as a belt type dehydrator that dehydrates the object to be processed supplied on the dehydration filter cloth traveling in the lateral direction by at least one of a gravity dehydration means, a vacuum suction dehydration means, and a pressure dehydration means. Is supplied to and dehydrated.

JP-A-2010-057997 Japanese Unexamined Patent Publication No. 2014-136201

However, in a device such as the concentrator described in Patent Document 1 in which concentrated sludge is discharged from the inside of a filter cylinder by a sludge discharge pump and supplied to a dehydrator, the solid matter concentration of the object to be treated is, for example, TS6. When the sludge is concentrated to a high concentration of about% to 8%, a sludge discharge pump having a high output is required, so that the concentration concentration cannot be increased. In addition, the excessively concentrated sludge may cause blockage of the piping during the transfer to the dehydrator, and the transfer by the piping may change the properties of the concentrated sludge and adversely affect the dehydration.

Further, in the concentrator described in Patent Document 2, the width of the filter cloth crossing the sludge that has been conveyed halfway in the transport direction of the filter body (filter cloth belt) in the transport direction of the filter body by the screw. Since it is moved in the direction, the equipment cost and operating cost of the screw and its driving means will increase. Further, in the concentrator described in Patent Document 2, the sludge is moved to the central portion in the width direction of the filter cloth by a screw, and the sludge thus moved to the central portion cannot be uniformly supplied to the dehydrator. Difficult, for example, in a belt press type dehydrator, if sludge cannot be uniformly supplied in the width direction and the thickness direction of the filter cloth, it causes wrinkling, meandering, and premature breakage of the filter cloth.

Furthermore, in the concentrating device described in Patent Document 2, the upper part of the filter body is open over the entire transport direction, and a wide range in the device becomes a corrosive atmosphere due to sludge scattering and the like. Or the frame is prone to corrosion. In addition, if the concentration of the concentrated sludge is not uniform, side leaks may occur and the water content of the dehydrated sludge may increase.

The present invention has been made under such a background, and it does not require a high-power pump to supply the object to be processed to the dehydrator, there is no risk of pipe blockage, and dehydration is performed. It is possible to supply the object to be treated uniformly in the width direction and the thickness direction of the dehydration filter cloth of the machine, and it is also possible to make the concentration status of the object to be processed uniform, even if the object to be processed is sludge. It is an object of the present invention to provide a concentrator capable of preventing a wide range of the inside from becoming a corrosive atmosphere, and to provide a belt press type dehydrator and a belt type dehydrator equipped with such a concentrator.

In order to solve the above problems and achieve such an object, the concentrator of the present invention has a box-shaped storage tank having an open bottom surface for supplying and storing the object to be processed, and laterally. A concentrator arranged on a traveling concentrated filter cloth, the storage tank has two facing wall portions facing each other at intervals in the traveling direction of the concentrated filter cloth, and the width of the concentrated filter cloth. It is provided with two side wall portions along the traveling direction connecting the side edges of the two facing wall portions in the direction, and the lower end edge of the first facing wall portion on the traveling direction side of the two facing wall portions. The distance between the concentrated filter cloth and the concentrated filter cloth is made larger than the distance between the lower end edge of the second facing wall portion on the opposite side of the traveling direction and the lower end edge of the two side wall portions and the concentrated filter cloth. An opening is formed at the lower end of the first facing wall portion, and the opening of the first facing wall portion extends in the traveling direction and the concentrated filter cloth increases toward the traveling direction side. An inclined plate that is inclined so that the distance between the cloth and the cloth is provided is provided . First, the inclined plate is characterized in that the inclination angle with respect to the concentrated filter cloth becomes smaller toward the traveling direction side. Secondly, the inclined plate is characterized in that the distance between the edge on the traveling direction side and the concentrated filter cloth can be adjusted, and third, the inclined plate is the concentrated filter. The inclination angle with respect to the cloth becomes smaller toward the traveling direction side, and the distance between the edge on the traveling direction side and the concentrated filter cloth can be adjusted .

Further, the belt press type dehydrator of the present invention is a belt press type dehydrator that dehydrates an object to be processed that is supplied and sandwiched between a pair of dehydration filter cloths wound around a dehydration roll, and is to be processed. A concentrator having the above configuration is provided on the supply direction side of the product, and the dehydration filter cloth located on the lower side of the pair of dehydration filter cloths on the supply direction side and the concentrated filter cloth are continuous. To do. Further, in the belt type dehydrator of the present invention, at least one of gravity dehydration means, vacuum suction dehydration means, and pressure dehydration means is used to dehydrate the object to be processed supplied on the dehydration filter cloth traveling in the lateral direction. It is a belt-type dehydrator that dehydrates by a dehydrating means, and is characterized in that the concentrating device having the above configuration is provided on the supply direction side of the object to be processed, and the dehydrated filter cloth and the concentrated filter cloth are continuous.

In the concentrator having the above configuration, an opening is formed at the lower end of the first facing wall portion of the storage tank on the traveling direction side of the concentrated filter cloth, and the object to be processed supplied to and stored in the storage tank is , The object to be processed stored in the lower part of the storage tank is supplied to the upper part and pressed by its own weight of the stored object to give filtration pressure, and while being filtered and concentrated by the concentrated filter cloth, the concentrated filter cloth runs. As a result, the material is discharged from the opening in the traveling direction with a uniform width due to friction with the concentrated filter cloth.

The opening of the first facing wall portion of the storage tank is provided with an inclined plate that extends in the traveling direction and the distance from the concentrated filter cloth becomes smaller toward the traveling direction. The object to be treated discharged from the opening is further pressed and concentrated by the inclination of the inclined plate, so that the concentration state becomes uniform and the thickness thereof becomes uniform.

Therefore, according to the concentrator having the above configuration, the object to be processed can be concentrated to a high concentration by the filtration pressure of the object to be processed stored in the storage tank and the inclination of the inclined plate only by running the concentrating filter cloth. It is possible to prevent leaks and to make the width and thickness of the object to be treated uniform on the concentrated filter cloth.

Further, in the belt press type dehydrator and the belt type dehydrator of the present invention, since the dehydrated filter cloth is continuous with the concentrated filter cloth, the object to be concentrated thus concentrated can be processed without requiring a high output pump. It can be supplied to the dehydrator as it is just by running the dehydration filter cloth, and uniform dehydration can be achieved. There is no risk of pipe blockage, and even if the object to be treated is sludge, the concentration is high. Since it is supplied in the form of a cake, it is possible to prevent the corrosive atmosphere from spreading.

Further, by making the inclination angle of the inclined plate smaller as the inclination angle with respect to the concentrated filter cloth becomes smaller toward the traveling direction side, the material to be processed discharged from the opening of the storage tank becomes closer to the traveling direction side. By gradually increasing the pressing force due to the inclination of the inclined plate toward the direction, the concentration can be further promoted, and a stable concentration state can be continuously obtained.

Further, by making the distance between the edge of the inclined plate on the traveling direction side and the concentrated filter cloth adjustable, the inclined plate can be adjusted according to the liquid level height of the object to be treated stored in the storage tank. By adjusting the distance between the edge of the cloth and the concentrated filter cloth to keep the filtration pressure received by the object to be treated constant in the storage tank, the concentration situation can be further made uniform, and the object to be processed supplied to the dehydrator. The concentration can be adjusted to suit the dehydrator.

When adjusting the distance between the edge of the inclined plate and the concentrated filter cloth in this way, the detection means for detecting the liquid level height of the object to be treated stored in the storage tank in the storage tank. The distance between the edge of the inclined plate on the traveling direction side and the concentrated filter cloth may be adjusted based on the detection result by the detection means.

Similarly, the storage tank is provided with a detection means for detecting the liquid level height of the object to be treated stored in the storage tank, and the concentrated filter cloth is run based on the detection result by the detection means. By making the speed adjustable, the amount of the object to be processed in the storage tank is kept constant, the filtration pressure received by the object to be processed is also constant, and the concentration state can be further made uniform.

Further, the storage tank may be provided with a leveling means for equalizing the liquid level height of the object to be treated stored in the storage tank. By making the liquid level of the object to be treated uniform in the storage tank by such a leveling means, it is possible to prevent a partial variation in the filtration pressure received by the object to be processed, and it is possible to prevent the concentration state. Further uniformity can be achieved. Even if a screw is used as such a leveling means, the object to be treated, which is supplied to the storage tank and forms a liquid level, has a low solid matter concentration, so that a large driving force is not required.

Further, also in this case, the storage tank is provided with a detection means for detecting the liquid level height of the object to be processed stored in the storage tank, and the leveling is performed based on the detection result by the detection means. By driving the means, it is possible to more reliably make the concentration state of the object to be concentrated and discharged uniform.

As described above, according to the present invention, the concentration status of the object to be processed can be made uniform at a high concentration and the width and thickness can be made uniform, and a high-power pump can be used, piping can be blocked, or equipment can be used. The concentrated object to be treated can be supplied to the dehydrator without causing corrosion.

It is a partially broken side view which shows one Embodiment of the concentrator of this invention, and one Embodiment of the belt press type dehydrator provided with the concentrator. It is a side view of one Embodiment of the concentrator shown in FIG. It is a top view of the embodiment shown in FIG. It is a front view seen from the traveling direction side of the concentrated filter cloth of the embodiment shown in FIG. It is a side sectional view of the embodiment shown in FIG. It is a plan sectional view of the embodiment shown in FIG.

FIG. 1 shows an embodiment of the concentrator of the present invention and a belt press type dehydrator provided with the concentrator, and FIGS. 2 to 5 show an embodiment of the concentrator. In the belt press type dehydrator of the present embodiment, a pair of dehydration filter cloths 1 and 2 are wound around a plurality of dehydration rolls 3, and at least one of the dehydration rolls 3 is rotationally driven by a rotation driving means (not shown). As a result, the object W is driven in the traveling direction indicated by the reference numeral F in the drawing, and the object W to be processed such as sludge supplied and sandwiched between the pair of dehydration filter cloths 1 and 2 is pressurized and dehydrated. In FIG. 1, reference numeral 4 indicates a return roll of the dehydrated filter cloths 1 and 2.

The concentrator of the present embodiment is provided on the supply direction side (left side in FIG. 1) of the object to be processed W to the belt press type dehydrator, and is placed on the concentrating filter cloth 5 traveling in the lateral direction. It is arranged. Here, in the present embodiment, of the pair of dehydration filter cloths 1 and 2 of the belt press type dehydrator, the dehydration filter cloth 1 which is located on the lower side in the supply direction side and runs in the horizontal horizontal direction is concentrated. The filter cloth 5 is continuous, that is, the dehydrated filter cloth 1 and the concentrated filter cloth 5 are common, and the object W to be concentrated by the concentrator is the concentrated filter cloth (dehydrated filter cloth 1) as it is. ) Is supplied to the belt press type dehydrator as it travels.

A plurality of support rolls 6 are spaced apart in the traveling direction F under the concentrated filter cloth 5 traveling in the lateral direction on the supply direction side, and the width of the concentrated filter cloth 5 perpendicular to and horizontal to the traveling direction F. It is arranged so as to extend in a direction (direction perpendicular to the drawing in FIGS. 1, 2 and 5; left-right direction in FIGS. 3, 4 and 6), and the concentrated filter cloth 5 is laid over these support rolls 6. ing. Further, in the front stage of the concentrator, a pre-concentrator such as a vertical screw type concentrator that pre-concentrates the object W to be supplied to the concentrator so that the solid matter concentration is about TS3% to 12%. 7 is arranged.

The concentrator has a box-shaped (rectangular parallelepiped) storage tank 11 having an open lower surface in which the pre-concentrated object W to be supplied and stored is stored, that is, the storage tank 11 is a concentrating filter cloth. Along the traveling direction F connecting the two opposing wall portions 11A and 11B facing each other in the traveling direction F of 5 and the side edges of the two opposing wall portions 11A and 11B in the width direction of the concentrated filter cloth 5. It is provided with two side wall portions 11C. The widths of the two facing wall portions 11A and 11B in the width direction of the concentrated filter cloth 5 are sufficiently larger than the widths of the two side wall portions 11C in the traveling direction F.

Further, the upper portion of the storage tank 11 is covered with the lid body 12, and the supply port 12A of the object to be processed W supplied from the pre-concentrator 7 is provided at the central portion of the lid body 12 in the width direction. There is. Further, one or a plurality of detection means 13 such as a photoelectric level meter for detecting the liquid level height of the object to be processed W stored in the storage tank 11 are attached to the lid body 12.

Further, the distance between the lower end edge of the first facing wall portion 11A on the traveling direction F side of the two facing wall portions 11A and 11B and the concentrated filter cloth 5 is the second facing wall on the side opposite to the traveling direction F. The distance between the lower end edge of the portion 11B and the lower end edge of the two side wall portions 11C and the concentration filter cloth 5 is made larger than the distance between the lower end edge of the storage tank 11 and the lower end portion of the first facing wall portion 11A of the storage tank 11 in the width direction. A rectangular opening 11D extending into the shape is formed. The distance between the lower end edge of the second facing wall portion 11B and the two side wall portions 11C and the concentrated filter cloth 5 is such that the concentrated filter cloth 5 has the lower end edge of the second facing wall portion 11B and the two side wall portions 11C. It is said that it can run while sliding with. Further, a rubber plate or the like (not shown) is attached to the second facing wall portion 11B other than the first facing wall portion 11A in which the opening 11D is formed and the lower end portions of the two side wall portions 11C to form the concentrated filter cloth 5. It is in sliding contact so that the object W to be processed does not leak when the concentrated filter cloth 5 is running.

The opening 11D of the first facing wall portion 11A is provided with an inclined plate 14 that extends in the traveling direction F and becomes smaller in distance from the concentrated filter cloth 5 toward the traveling direction F side. .. The inclined plate 14 is attached to a surface of the first facing wall portion 11A above the opening 11D facing the traveling direction F side so as to be rotatable in the vertical direction via a hinge 15 or the like. This traveling is caused by the adjusting means 16 such as an actuator attached to the facing wall portion 11A of 1 and connected to the edge portion on the traveling direction F side of the inclined plate 14 so as to be rotationally movable in the vertical direction around the hinge 15. The distance between the edge on the F side and the concentrated filter cloth 5 can be adjusted in the range of, for example, 5 mm to 30 mm.

Further, the inclination angle of the inclined plate 14 with respect to the concentrated filter cloth 5 becomes smaller toward the traveling direction F side. Specifically, in the present embodiment, the inclined plate 14 has a folded plate shape provided with a plurality of inclined portions in which the inclination angle with respect to the concentrated filter cloth 5 gradually decreases toward the traveling direction F side. The inclined plate 14 may have a curved plate shape in which the inclination angle with respect to the concentrated filter cloth 5 continuously decreases toward the traveling direction F side, or may be a flat plate shape in which the inclination angle does not change in some cases.

At the lower ends of the two side wall portions 11C of the storage tank 11, extension portions 11E are formed to cover the range in which the inclined plate 14 extends toward the traveling direction F side, and the inclined plate 14 has both end edges in the width direction. Can be slidably contacted with the extension portion 11E. As shown in FIGS. 2 and 5, the upper end edges of these extension portions 11E are configured to cover a position higher than the opening 11D on the side opposite to the traveling direction F, and are concentrated toward the traveling direction F side. It has a tapered shape approaching the filter cloth 5 side, and extends beyond the edge of the inclined plate 14 on the traveling direction F side.

Further, the storage tank 11 is provided with a leveling means 17 for equalizing the liquid level height of the object W to be processed and stored in the storage tank 11. In the present embodiment, the leveling means 17 is a screw in which screw blades 17B are attached to the outer periphery of a horizontal screw shaft 17A spanned in the width direction in the storage tank 11, and as shown in FIG. The height is set so that the lower edge portion of the blade 17B or the entire screw blade 17B is immersed in the object W to be processed. Further, the height of the leveling means 17 can be adjusted.

Further, the twisting direction of the screw blade 17B is opposite to that of the central portion of the screw shaft 17A in the longitudinal direction. Such leveling means 17 is provided from a supply port 12A provided at the center in the width direction of the storage tank 11 by rotating the screw shaft 17A by a driving means 17C such as a motor provided outside the storage tank 11. The supplied object W to be processed is moved to both ends in the width direction to make the liquid level height of the object W to be processed uniform.

In the present embodiment, the rotation of the screw shaft 17A by the driving means 17C of the leveling means 17 and the edge of the inclined plate 14 on the traveling direction F side by the adjusting means 16 such as an actuator and the concentrated filter cloth 5 are used. The interval adjustment is performed based on the liquid level height of the object W to be processed in the storage tank 11 detected by the detection means 13. That is, in the leveling means 17, when the detection means 13 detects that the liquid level height of the object to be processed W stored in the storage tank 11 exceeds a predetermined range and is non-uniform, the screw shaft 17A is rotated. The liquid level is leveled, and when the liquid level is within the predetermined range, the rotation of the screw shaft 17A is stopped. Depending on the operating condition, the screw shaft 17A can be constantly rotated for operation without being based on the liquid level height of the object W to be processed in the storage tank 11.

Further, in the adjusting means 16, when the detecting means 13 detects that the liquid level height of the object W to be processed in the storage tank 11 is equal to or higher than a predetermined range, the adjusting means 16 is driven after monitoring the timer. By increasing the distance between the edge of the inclined plate 14 on the traveling direction F side and the concentrated filter cloth 5, the object W to be discharged as the concentrated filter cloth 5 travels is increased, and the timer is monitored. This operation is repeated until the liquid level reaches a predetermined range.

On the contrary, when it is detected that the liquid level height of the object W to be processed in the storage tank 11 is equal to or less than a predetermined range, the adjusting means 16 is driven after the timer is monitored to drive the inclined plate 14 in the traveling direction F. By reducing the distance between the edge on the side and the concentrated filter cloth 5, the object W to be discharged as the concentrated filter cloth 5 runs is reduced, and the timer is monitored to determine the liquid level. This operation is repeated until the range is reached.

Further, when the liquid level height of the object to be processed W in the storage tank 11 does not return to a predetermined range only by adjusting the distance between the edge of the inclined plate 14 on the traveling direction F side and the concentrated filter cloth 5. The traveling speed of the concentrated filter cloth 5, that is, the traveling speed of the pair of dehydrating filter cloths 1 and 2 of the belt press type dehydrator is adjusted within a range that minimizes the influence on the performance of the belt press type dehydrator. You may.

That is, when the detection means 13 detects that the liquid level height of the object W to be processed in the storage tank 11 remains within a predetermined range or higher, the traveling speed is increased and the material W is discharged from the storage tank 11. When it is detected that the liquid level of the object to be processed W in the storage tank 11 remains below a predetermined range by increasing the discharge amount of the object to be processed W, the traveling speed is slowed down and stored. The amount of the object to be processed W discharged from the tank 11 is reduced. It should be noted that these operations may be automatically performed by connecting the detecting means 13, the adjusting means 16, the leveling means 17, and the rotation driving means of the dehydration roll 3 via a control means such as a computer. Alternatively, the operator who has confirmed the detection means 13 may manually perform the detection.

In the concentrator configured as described above and the belt press type dehydrator equipped with the concentrator, the object W to be processed supplied and stored from the pre-concentrator 7 to the storage tank 11 is pressed by its own weight and has a filtration pressure. Is formed on the first facing wall portion 11A of the storage tank 11 by friction with the running concentrated filter cloth 5 while being filtered and concentrated by the concentrated filter cloth 5 located directly below the storage tank 11. It is discharged in the traveling direction F with a uniform width in the width direction from the opening 11D.

The opening 11D is provided with an inclined plate 14 that extends in the traveling direction F and becomes smaller in distance from the concentrated filter cloth 5 toward the traveling direction F, so that the opening 11D is discharged from the opening 11D. The object W to be processed is further pressed and concentrated by the inclination of the inclined plate 14, so that the concentrated state becomes a uniform cake shape and the thickness thereof becomes uniform.

Therefore, in the concentrator having the above configuration, the object W to be processed is concentrated to a high concentration by the filtration pressure of the object W to be processed stored in the storage tank 11 and the inclination of the inclined plate 14, and dehydrated in the belt press type dehydrator. It is possible to prevent side leaks from the filter cloths 1 and 2, and to make the width and thickness of the object to be treated W on the concentrated filter cloth 5 uniform.

For example, when the object W to be processed is sludge and the solid matter concentration of the object W to be processed supplied to the storage tank 11 is TS 3% to 12% as described above, the object W to be processed in the storage tank 11 When the liquid level height is 100 mm to 500 mm, a concentration effect can be obtained by removing 3 wt% to 5 wt% of water with respect to the supplied object W to be treated. When the object W to be processed is sludge, if the concentration of the solid substance W supplied into the storage tank 11 is too low, the object W to be processed leaks from between the storage tank 11 and the concentrated filter cloth 5. If it cannot be stored in the storage tank 11 and the solid matter concentration is too high, uniform and smooth discharge from the opening 11D may not be possible.

Further, in the belt press type dehydrator having the above configuration, since the dehydration filter cloth 1 and the concentrated filter cloth 5 are continuous, the concentrated object W to be processed can be used as it is in the dehydrator without requiring a high output pump. It can be supplied and uniform dehydration can be achieved, and there is no risk of pipe blockage. Moreover, even if the object W to be treated is sludge, it is supplied in the form of a cake, so that it is possible to prevent the corrosive atmosphere from spreading and suppress the corrosion of the equipment.

Further, in the present embodiment, the inclined plate 14 is set so that the inclination angle with respect to the concentrated filter cloth 5 becomes smaller toward the traveling direction F side. Therefore, it is possible to further promote the concentration by gradually increasing the pressing force due to the inclination of the inclined plate 14 toward the traveling direction F side with respect to the object W discharged from the opening 11D of the storage tank 11. It is possible to continuously obtain a stable concentration situation.

Further, in the inclined plate 14, the distance between the edge on the traveling direction F side and the concentrated filter cloth 5 can be adjusted by the adjusting means 16. Therefore, as described above, the liquid level height is adjusted by adjusting the distance between the edge of the inclined plate 14 and the concentrated filter cloth 5 according to the liquid level height of the object W to be processed stored in the storage tank 11. By making it constant, the filtration pressure received by the object W to be processed in the storage tank 11 can also be made constant, and the concentration state can be further made uniform and stable sludge can be concentrated. Further, since the liquid level height of the object to be processed W in the storage tank 11 can be adjusted in this way, the concentration of the object to be processed W discharged from the concentrator is also suitable for dehydration by the belt press type dehydrator in the subsequent stage. It can also be adjusted to a different concentration.

Further, in the present embodiment, the storage tank 11 is provided with a detection means 13 such as a photoelectric level meter for detecting the liquid level height of the object to be processed W stored in the storage tank 11. Based on the detection result of 13, the distance between the edge of the inclined plate 14 on the traveling direction F side and the concentrated filter cloth 5 is adjusted. Therefore, the liquid level height of the object to be processed W in the storage tank 11 can be adjusted more reliably.

Further, in the present embodiment, the traveling speed of the concentrated filter cloth 5 (dehydrated filter cloth 1) can be adjusted based on the detection result by the detection means 13. Therefore, as described above, the liquid level height of the object W to be processed in the storage tank 11 can be kept constant only by adjusting the distance between the edge of the inclined plate 14 on the traveling direction F side and the concentrated filter cloth 5. By adjusting the traveling speed of the concentrated filter cloth 5 (dehydrated filter cloth 1) in this way, the liquid level height of the object to be treated W in the storage tank 11 can be kept constant.

Further, in the present embodiment, the storage tank 11 is provided with a leveling means 17 for equalizing the liquid level height of the object to be processed W stored in the storage tank 11, and the leveling means 17 provides. The liquid level height of the object W to be processed in the storage tank 11 can be made uniform. Therefore, even if the liquid level of the object W to be processed partially varies in the storage tank 11, the leveling means 17 keeps the liquid level constant and the filtration pressure received by the object W to be processed. It is possible to prevent partial variation from occurring. Moreover, even if a screw having a screw shaft 17A and a screw blade 17B is used as the leveling means 17, the object W to be processed, which is supplied to the storage tank 11 and forms a liquid level, is a solid substance. Since the concentration is low, it can be installed above the liquid level and rotated at a low speed, so a large driving force is not required.

Further, in the present embodiment, the leveling means 17 is also driven based on the detection result by the detection means 13 provided in the storage tank 11. Therefore, the liquid level height of the object to be treated W in the storage tank 11 can be made uniform more reliably, and the concentration state of the object to be processed to be concentrated and discharged can be further made constant.

In the present embodiment, in order to dehydrate the object to be processed W concentrated by the concentrator, the object to be processed is supplied and sandwiched between a pair of dehydration filter cloths 1 and 2 wound around the dehydration roll 3. A belt press type dehydrator for dehydrating the object W is used, but instead of this, although not shown, the object W to be processed supplied on the dehydration filter cloth traveling in the lateral direction is subjected to gravity dehydration means. Using a belt-type dehydrator that dehydrates by at least one of the vacuum suction dehydration means and the pressure dehydration means, the concentrator having the above configuration is located on the supply direction side of the object W of the belt-type dehydrator. It may be provided with.

Here, as the gravity dehydration means, a tray for collecting the dehydrated liquid may be laid under a support roll for supporting the dehydration filter cloth, and as the vacuum suction dehydration means, the dehydration filter cloth is supported. A vacuum tray connected to the vacuum suction device may be discharged under the support roll to be used, and as the pressure dehydration means, a pressure plate for supplying compressed air or an object W to be processed is pressed on the dehydration filter cloth. It may be provided with a pressing roll to be used.

Even in such a belt-type dehydrator, by connecting the dehydration filter cloth and the concentration filter cloth 5 continuously, the dehydration is concentrated without requiring a high-power pump or causing clogging of the piping. The object W to be processed can be supplied to the dehydrator as it is, and side leaks from the dehydrated filter cloth and corrosion of the equipment can be prevented.

In addition, instead of the conventional belt press type dehydrator's sludge and other object W supply device, a concentrator having the above configuration can be provided, and in this case, the conventional supply device becomes unnecessary. In this case, since the more concentrated object W to be processed can be supplied to the belt press type dehydrator, the gravity concentration region of the conventional belt press type dehydrator can be significantly shortened, and the belt The press type dehydrator can be made compact.

1, 2 Dewatering filter cloth 3 Dehydrating roll 5 Concentrating filter cloth 7 Pre-concentrator 11 Storage tank 11A First facing wall part 11B Second facing wall part 11C Side wall part 11D Opening 12 Lid body 12A Supply port 13 Detection means 14 Inclined plate 16 Adjusting means 17 Leveling means W Processed object F Running direction of dehydrated filter cloths 1 and 2 and concentrated filter cloth 5

Claims (7)

A concentrator having a box-shaped storage tank with an open lower surface to which the object to be processed is supplied and stored, and is arranged on a concentrating filter cloth running in the lateral direction.
The storage tank is in the traveling direction connecting the two facing wall portions facing each other at intervals in the traveling direction of the concentrated filter cloth and the side edges of the two facing wall portions in the width direction of the concentrated filter cloth. It is provided with two side wall portions along the side wall and a detecting means for detecting the liquid level height of the object to be processed stored in the storage tank.
Of the two facing wall portions, the distance between the lower end edge of the first facing wall portion on the traveling direction side and the concentrated filter cloth is the lower end edge of the second facing wall portion on the opposite side of the traveling direction and the lower end edge. An opening is formed at the lower end of the first facing wall portion so as to be larger than the distance between the lower end edges of the two side wall portions and the concentrated filter cloth.
The opening of the first facing wall portion is provided with an inclined plate that extends in the traveling direction and is inclined so that the distance from the concentrated filter cloth becomes smaller toward the traveling direction side.
A concentrating device characterized in that the distance between the edge of the inclined plate on the traveling direction side and the concentrating filter cloth is adjusted based on the detection result by the detecting means. The concentrator according to claim 1, wherein the inclined plate has a smaller inclination angle with respect to the concentrated filter cloth toward the traveling direction side. The concentrator according to claim 1 or 2, wherein the traveling speed of the concentrated filter cloth can be adjusted based on the detection result by the detection means. One of claims 1 to 3, wherein the storage tank is provided with a leveling means for equalizing the liquid level height of the object to be treated stored in the storage tank. The concentrator according to. The concentrator according to claim 4, wherein the leveling means is driven based on the detection result by the detection means. A belt press type dehydrator that dehydrates the object to be processed that is supplied and sandwiched between a pair of dehydration filter cloths wound around a dehydration roll.
The concentrator according to any one of claims 1 to 5 is provided on the supply direction side of the object to be processed.
A belt press type dehydrator characterized in that the dehydration filter cloth located on the lower side of the pair of dehydration filter cloths on the supply direction side and the concentrated filter cloth are continuous. A belt-type dehydrator that dehydrates the object to be processed supplied on a dehydration filter cloth traveling in the lateral direction by at least one of a gravity dehydration means, a vacuum suction dehydration means, and a pressure dehydration means. hand,
The concentrator according to any one of claims 1 to 5 is provided on the supply direction side of the object to be processed.
A belt-type dehydrator characterized in that the dehydration filter cloth and the concentrated filter cloth are continuous.

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