JP5734643B2 - Sludge dewatering equipment - Google Patents

Description

  The present invention relates to a sludge dewatering device for separating moisture from sludge.

  The sludge accumulated at the bottom of the septic tank is collected by suction using a suction wheel and transported to the final treatment plant to be processed, but the sucked sludge contains a lot of water. Therefore, it is desirable that the sucked sludge is separated into solid content and moisture, and only the solid content is transported. For example, Patent Document 1 discloses a vehicle equipped with a dehydrator and a sludge treatment apparatus.

  The dehydrator mounted on this vehicle rotates a dehydration basket with an electric motor and separates the solid-liquid mixture supplied into the dehydration basket into solid and liquid by centrifugal force generated by the rotation of the dehydration basket. is there. The sludge is separated into three layers of dewatered cake, unseparated sludge, and moisture in order from the outside in the dewatering basket. Among the separated sludge, the moisture and unseparated sludge are returned to the river etc., and the remaining dehydrated cake Is scraped off the dewatering basket using a sludge scraper.

JP 2000-246144 (paragraphs 0007, 0021, FIG. 8)

  As described above, the conventional dehydrator separates sludge solids and moisture by centrifugal separation using the difference in specific gravity, but the sludge is dehydrated cake, unseparated sludge and moisture in the dehydration basket. The unseparated sludge is returned to the river. Therefore, in the conventional dehydrator, the sludge cannot be separated into solid content and moisture at a time, and it is necessary to repeatedly treat the sludge, which is inefficient.

  Therefore, an object of the present invention is to provide a sludge dewatering device that can efficiently separate sludge into solid content and moisture at a time.

  The sludge dewatering device of the present invention is a sludge dewatering device that separates moisture from sludge, and is a rotating drum into which sludge is charged, and includes a rotating drum having a plurality of through holes in the peripheral wall, and a peripheral wall of the rotating drum. It has a filter that is detachably mounted along the inner surface and allows moisture to pass through without allowing solids to pass through.

  According to the sludge dewatering device of the present invention, the sludge thrown into the rotating drum is pressed against the inner surface of the peripheral wall of the rotating drum by the centrifugal force when the rotating drum rotates. At this time, the water contained in the sludge is squeezed out by the filter, and is swept away from the plurality of through holes provided in the peripheral wall of the rotating drum. Thereby, moisture is separated from the sludge, the solid content remains in the filter, and the solid content can be taken out of the rotating drum together with the filter.

  Here, it is desirable that the rotating drum has a bottom and has an upper end opened, and the upper end of the rotating drum preferably has a flange protruding inward. When the bottomed rotating drum is rotated at high speed, the sludge rises upward along the inner surface of the peripheral wall of the rotating drum, so the sludge rotates by having a flange protruding inward at the upper end of the rotating drum. Blowing out from the opening at the upper end of the drum can be prevented.

  The flange preferably has a fixing portion for fixing the filter. As a result, the removable filter covers up to the flange, so that the solid content of the sludge rising upward along the inner surface of the peripheral wall of the rotating drum can be pressed by the flange through this filter, and the remaining solid sludge It is possible to easily take out the minute together with the filter out of the rotating drum.

  The rotating drum is preferably provided with a plurality of convex portions on the inner surface of the peripheral wall. The plurality of projections provided on the inner surface of the peripheral wall can prevent the movement of the filter and sludge during rotation of the rotary drum, prevent the filter and sludge from being biased, and prevent the sludge thrown into the rotary drum Evenly, it can be separated into solids and moisture.

  The sludge dewatering device of the present invention further includes a casing in which a rotating drum is provided, a drain opening provided in a lower portion of the casing, an inlet for introducing sludge into the rotating drum from the upper portion of the casing, and a rotating drum. It is desirable to have a rotation mechanism.

  Thereby, the sludge is thrown into the rotating drum provided in the casing from the charging port, and by rotating the rotating drum by the rotating mechanism, the moisture separated from the sludge as described above is shaken off in the casing, It is discharged from a drain outlet provided in the lower part of the casing.

(1) A rotating drum into which sludge is charged, and is mounted detachably along a rotating drum having a plurality of through holes formed in the peripheral wall and an inner surface of the peripheral wall of the rotating drum, and allows moisture to pass without passing through solids. With the filter that allows the water to pass through, the moisture contained in the sludge is squeezed out by the filter, separated from the plurality of through holes provided in the peripheral wall of the rotating drum, and separated, and the solid content rotates together with the filter. Since it can be taken out of the drum, it becomes possible to efficiently separate sludge into solid and moisture at a time.

(2) The rotating drum is bottomed and the upper end is opened, and the upper end of the rotating drum has a flange protruding inward to prevent sludge from rising. The sludge can be prevented from being ejected from the opening at the upper end of the rotating drum.

(3) Since the flange has a fixing part for fixing the filter, the solid content of the sludge rising upward along the inner surface of the peripheral wall of the rotating drum is pressed by the flange through the filter, and the remaining sludge The solid content can be easily taken out of the rotating drum together with the filter.

(4) Since the rotating drum is provided with a plurality of convex portions on the inner surface of the peripheral wall, the unevenness of the filter and sludge during rotation of the rotating drum is prevented, and the sludge thrown into the rotating drum is evenly distributed. It can be separated into solids and moisture.

It is a longitudinal cross-sectional view of the sludge dehydration apparatus in embodiment of this invention. It is a top view of the sludge dehydration apparatus of FIG. It is a longitudinal cross-sectional view of the rotating drum of FIG.

  1 is a longitudinal sectional view of a sludge dewatering device according to an embodiment of the present invention, FIG. 2 is a plan view of the sludge dewatering device of FIG. 1, and FIG. 3 is a longitudinal sectional view of a rotating drum of FIG.

  In FIG. 1, a sludge dewatering device 1 according to an embodiment of the present invention separates moisture from sludge, and includes a rotary drum 2 into which sludge is charged and a filter that is detachably mounted in the rotary drum 2. 3 and a rotating mechanism 4 that rotates the rotating drum 2. The rotation mechanism 4 includes a rotation shaft 5 connected to the rotation drum 2, a motor 6 as a drive source for rotating the rotation drum 2, and a V belt 7 as a transmission mechanism that transmits the rotation of the motor 6 to the rotation shaft 5. Have

  As shown in FIG. 3, the rotating drum 2 has a cylindrical peripheral wall 2b formed by a punching plate in which small holes 2a as a large number of through holes are formed, and has a bottom 2c. The upper end of the rotating drum 2 is opened, and the upper end thereof has a flange 2d that protrudes inward. The protrusion width of the flange 2d is about 1 cm to 10 cm, more preferably about 2 cm to 5 cm.

  Further, ribs 8 that form a plurality of convex portions are provided on the inner surface of the peripheral wall 2 b of the rotary drum 2. In the present embodiment, the ribs 8 are provided obliquely with respect to the vertical direction. However, the ribs 8 may be provided in a direction parallel to the vertical direction. Further, the flange 2d of the rotary drum 2 is provided with a plurality of pins 9 that form a fixing portion for fixing the filter 3.

  The rotating drum 2 is provided inside the casing 10 whose upper side is opened. The casing 10 is provided on a movable carriage 11. The motor 6 and the like are accommodated in the carriage 11. Further, the carriage 11 is provided with wheels 12 so as to be able to travel, and the sludge dewatering device 1 is easily transported by being loaded on a suction vehicle (not shown) or the like, and traveled by being lowered. It is possible.

  In addition, an upper cover 13 in which an inlet 14 a for introducing sludge into the rotary drum 2 is formed is detachably provided at the upper portion of the casing 10. On the other hand, a drainage port 14b for discharging moisture separated from the sludge to the outside is provided at the lower portion of the casing 10. An open / close valve 15 is connected to the drain port 14b.

  The filter 3 is formed in a bag shape by allowing moisture to pass therethrough without passing solid content such as cloth or paper. The filter 3 is mounted along the inner surface of the peripheral wall 2b of the rotary drum 2 and is fixed by engaging an upper end portion with a plurality of pins 9 provided on the flange 2d of the rotary drum 2. After separating the water from the sludge, the filter 3 can disengage the pin 9 and take it out from the rotating drum 2 together with the sludge.

  In the sludge dewatering device 1 configured as described above, the rotating drum 2 is rotated at a high speed by the motor 6 via the V-belt 7 and the rotating shaft 5 at about 500 to 1500 rpm, and sludge containing water (sludge water) is supplied from the inlet 14 a of the upper cover 13. ) Is supplied. The sludge charged into the rotating drum 2 is pressed against the inner surface of the peripheral wall 2b of the rotating drum 2 on which the filter 3 is mounted by the centrifugal force when the rotating drum 2 rotates. At this time, the moisture contained in the sludge is squeezed out by the filter 3 and shaken off from the plurality of small holes 2 a provided in the peripheral wall 2 b of the rotating drum 2 into the outer casing 10.

  Thereby, moisture is separated from the sludge, and the separated moisture falls into the casing 10. And the water | moisture content collected in the casing 10 is discharged | emitted suitably outside through the opening-and-closing valve 15 from the drain port 14b provided in the lower part. On the other hand, only the sludge from which moisture has been separated, that is, the solid content, remains in the filter 3. When this solid content is accumulated to some extent, the solid content is taken out of the rotary drum 2 together with the filter 3.

  Further, in the sludge dewatering device 1, the upper end of the rotating drum 2 has a flange 2d protruding inward, so that the sludge that rises upward along the inner surface of the peripheral wall 2b due to high-speed rotation of the rotating drum 2. Is suppressed by the flange 2d, and ejection from the opening at the upper end of the rotating drum 2 is prevented.

  In the sludge dewatering device 1, the filter 3 is fixed by the pin 9 of the flange 2d, and the filter 3 covers up to the flange 2d. Therefore, the solid content of the sludge rising upward along the inner surface of the peripheral wall 2b of the rotary drum 2 is pressed by the flange 2d through the filter 3, so that the remaining solid content of the sludge together with the filter 3 is rotated with the rotary drum. 2 can be easily taken out.

  In the present embodiment, the filter 3 is fixed in the rotating drum 2 only by the upper pin 9, but a plurality of ribs 8 are provided on the inner surface of the peripheral wall 2 b of the rotating drum 2. Therefore, when the rotary drum 2 rotates, the filter 3 is caught by the rib 8 and the movement of the filter 3 is prevented. Therefore, in this sludge dewatering device 1, the movement of the filter 3 and sludge during rotation of the rotary drum 2 is prevented, and the bias of the filter 3 and sludge is prevented, so that the sludge thrown into the rotary drum 2 is uniformly solidified. It is possible to separate into water and moisture.

  The sludge dewatering device of the present invention is useful as a device for separating and concentrating water from sludge collected from the bottom of a septic tank, rivers, lakes, sea bottoms and water channels.

DESCRIPTION OF SYMBOLS 1 Sludge dewatering device 2 Rotating drum 2a Small hole 2b Peripheral wall 2c Bottom 2d Flange 3 Filter 4 Rotating mechanism 5 Rotating shaft 6 Motor 7 V belt 8 Rib 9 Pin 10 Casing 11 Carriage 12 Wheel 13 Upper cover 14a Input port 14b Drain port 15 Open / close valve

Claims (4)

A sludge dewatering device for separating water from sludge,
A rotating drum having a bottom, into which the sludge is charged, having an open upper end, a flange projecting inwardly at the upper end, and a plurality of through holes formed in a peripheral wall; ,
A filter that is detachably mounted along the inner surface of the peripheral wall of the rotating drum, and is formed into a bag shape by cloth or paper that allows moisture to pass without passing through the solid content;
Said flange has a fixed portion for fixing the filter state, and are not covered by the filter,
Furthermore, the sludge dewatering device provided with the some convex part for preventing the movement of the said filter on the inner surface of the surrounding wall of the said rotating drum .   The sludge dewatering device according to claim 1, wherein the fixing portion is a plurality of pins that can engage the filter. The sludge dewatering device according to claim 1 or 2, wherein the convex portion is a rib provided in an oblique direction or a parallel direction with respect to a vertical direction. A casing in which the rotating drum is provided, and
A drain outlet provided in a lower portion of the casing;
An inlet for introducing the sludge into the rotating drum from the upper part of the casing;
The sludge dewatering device according to any one of claims 1 to 3 , further comprising a rotating mechanism that rotates the rotating drum.

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