Aerated grit sand setting deslagging basin and sewage treatment system thereof

[0073] Example one:

[0074] Such as Figure 1a with Figure 2-5 As shown, an aerated sand settling and slag removal tank includes a tank body, an aeration pipe 9, a first slag collecting structure 5, and a slag scraping mechanism 3. The tank body includes a water inlet 1 and a first water outlet 6. The tank The bottom surface of the body includes an arc surface 13, a slope 14 and a sand collection area 7 in sequence from the water inlet end to the water outlet end. The sand collection area is surrounded by slopes that allow sand to collect into the sand collection area. There is a sand suction pipe 8, which is connected to the sand suction pump 31; the first water outlet is a submerged weir.

[0075] It also includes a water distributor, which is combined with the curved surface to realize water distribution; the water distributor spans the width direction of the aeration grit and slag removal tank, and the water distributor is composed of a water distributor plate 11 with the top not lower than the water surface. The water distribution board includes an arc panel 40 arranged vertically and a horizontal cross section of a semi-circular arc, and a bottom plate 41 arranged at the bottom of the arc panel to prevent water from directly flowing down. The bottom plate is a flat plate, and the bottom plate is perpendicular to the arc panel. , The semi-circular arc opening of the cross section of the arc panel faces the pool wall with the water inlet, the height of the arc panel is 1/3 of the depth of the pool body at the water inlet, the bottom plate does not completely seal the bottom of the arc panel, and there is an opening for water to flow out ; The level of the starting end of the arc-shaped surface is not lower than the level of the bottom of the water distribution board, and the end of the arc-shaped surface transitions smoothly with the slope, so that sand particles can slide into the sand collection area without obstacles; the water distribution board of this embodiment is as Figure 5 Shown.

[0076] It also includes a slag retaining wall. The slag retaining wall is composed of slag retaining plates 4 whose top is not lower than the water surface. The slag retaining wall is arranged along the length of the pool body, extending from the position near the water distribution plate to the pool wall, and The body is divided into a slag removal zone 2 and a sand settling zone 10; the width of the water distributor is such that the water distributor spans at least across the aerated sand settling tank sand settling zone and at most across the aerated sand settling tank body; The slag retaining wall can be fixed on the bottom or wall of the pool.

[0077] The scraping mechanism includes a motor 19, a drive chain 20, a driving wheel 21, a scraping chain 23, a driven wheel 24, a chute and a scraping plate 22. The motor transmits power to the driving wheel through the transmission chain to drive the scraping chain to move. , The slag scraper set on the slag scraping chain starts to scrape the slag; the slag scraping mechanism is set above the slag removal area, the first slag collecting structure is set at the end of the slag removal area to receive the oil slag; the slag scraping mechanism is fixed on the water surface by the bracket 34 Above, the slag scraper of the slag scraping mechanism can go deep below the water surface for slag scraping. In order to enable the slag scraping mechanism to smoothly scrape the scum into the first slag collecting structure, a guide slag slope 42 is added at the junction of the slag removal area and the first slag collection structure, and the two wheels closest to the guide slag slope (drive wheel or The angle of the connecting line between the driven wheels is parallel to the guide slag slope. The chute is arranged between every two wheels for supporting the slag scraper chain. In this embodiment, the slag scraping mechanism can also be replaced with an underwater slag scraping mechanism commonly used in the art.

[0078] The position of the water inlet makes the water flow in from the side of the water distribution plate with the bottom plate along the tangent direction of the arc panel; the height of the bottom plate is not higher than the height of the bottom of the water inlet;

[0079] In this embodiment, the width of the water distributor exceeds the width of the grit area, and the water inlet is arranged on the side close to the slag removal area; the width of the bottom plate makes the distance between the inner edge 45 of the bottom plate and the pool wall of the slag removal area greater than the width of the slag removal area. The width of the bottom plate is not less than the width of the water inlet corresponding to the water distribution plate where the bottom plate is located.

[0080] Embodiment two:

[0081] Such as Figure 1b with Figure 2-5 As shown, an aerated sand settling and slag removal tank includes a tank body, an aeration tube, a first slag collecting structure, and a slag scraping mechanism. The tank body includes a water inlet and a first water outlet. The water end to the water outlet includes an arc surface, a slope, and a sand collection area in turn. The sand collection area is surrounded by slopes that allow sand to collect in the sand collection area. The sand collection area is equipped with sand suction pipes and sand suction pipes. Connected to the sand suction pump; the first water outlet is an overflow weir.

[0082] It also includes a water distributor, which is combined with the curved surface to realize water distribution; the water distributor spans the width direction of the aeration, grit and slag removal tank, and the water distributor is composed of a water distributor plate whose top is not lower than the water surface The water distribution plate includes an arc panel arranged vertically and a horizontal cross section of a semi-circular arc, and a bottom plate arranged at the bottom of the arc panel to prevent water from directly flowing down. The bottom plate is a flat plate, and the bottom plate is perpendicular to the arc panel. The semi-circular arc opening of the cross section faces the pool wall with the water inlet. The height of the arc panel is 1/3 of the depth of the pool body at the water inlet. The bottom of the arc panel is not completely closed by the bottom plate, and there is an opening for water supply to flow out; The level of the starting end of the surface is not lower than the level of the bottom of the water distribution board, and the end of the curved surface transitions smoothly with the slope, so that sand particles can slide into the sand collection area without obstacles; the water distribution board of this embodiment is as Figure 5 Shown.

[0083] It also includes a slag retaining wall. The slag retaining wall is made up of slag retaining boards whose tops are not lower than the water surface. The slag retaining walls are arranged along the length of the pool body, extending from a position close to the water distribution board to the pool wall, and connecting the pool body It is divided into a slag removal zone and a sand settling zone; the width of the water distributor is such that the water distributor spans at least across the aerated sand settling and slagging tank sedimentation zone at most across the aerated sand settling and slagging tank body; Can be fixed at the bottom of the pool.

[0084] The slag scraping mechanism includes a motor, a transmission chain, a driving wheel, a slag scraping chain, a driven wheel, a chute, and a slag scraper. The motor transmits power to the driving wheel through the transmission chain to drive the slag scraping chain to move, and is located in the slag scraping chain. The slag scraping board on the upper side starts to scrape the slag; the slag scraping mechanism is set above the slag removal area, and the first slag collecting structure is set at the end of the slag removal area to receive the oil slag; the slag scraping mechanism is fixed above the water surface by a bracket to make the The scraper can go deep below the water surface for scraping. In order to enable the slag scraping mechanism to smoothly scrape the scum into the first slag collection structure, a slag guide slope is added at the junction of the slag removal area and the first slag collection structure, and the two wheels closest to the guide slag slope (drive wheel or slave The angle of the connecting line between the driving wheels is parallel to the guide slag slope. The chute is arranged between every two wheels for supporting the slag scraper chain.

[0085] The position of the water inlet makes the water flow in from the side of the water distribution plate with the bottom plate along the tangent direction of the arc panel; the height of the bottom plate is not higher than the height of the bottom of the water inlet;

[0086] In this embodiment, the width of the water distributor just covers the width of the sand settling area, and the water inlet is arranged on the side of the water distributor near the slag removal area. In other embodiments when the width of the water distributor just covers the width of the sand settling zone, the water inlet can also be provided on the side of the water distributor away from the slag removal zone.

[0087] Embodiment three:

[0088] Such as Figure 6-8 As shown, an aerated sand settling and slag removal tank includes a tank body, an aeration tube, a first slag collecting structure, and a slag scraping mechanism. The tank body includes a water inlet and a first water outlet. The water end to the water outlet includes an arc surface, a slope, and a sand collection area in turn. The sand collection area is surrounded by slopes that allow sand to collect in the sand collection area. The sand collection area is equipped with sand suction pipes and sand suction pipes. Connected to the sand suction pump; the first water outlet can be an overflow weir.

[0089] It also includes a water distributor, which is combined with the curved surface to realize water distribution; the water distributor spans the width direction of the aeration, grit and slag removal tank, and the water distributor is composed of a water distributor plate whose top is not lower than the water surface The water distribution plate includes an arc panel arranged vertically and a horizontal cross section of a semi-circular arc, and a bottom plate arranged at the bottom of the arc panel to prevent water from directly flowing down. The bottom plate of this embodiment is an arc plate, and the arc shape where the bottom plate is located The surface is arranged obliquely downward at an angle of 45° with the horizontal plane. The semi-circular arc opening of the cross section of the arc panel faces the pool wall with the water inlet. The height of the arc panel is 2/3 of the depth of the pool body at the water inlet. The bottom of the arc panel is not completely closed by the bottom plate, and there is an opening for water supply to flow out. The height of the bottom plate is not higher than the height of the bottom of the water inlet. The level of the starting end of the arc-shaped surface is not lower than the level of the bottom of the water distribution plate, and the end of the arc-shaped surface transitions smoothly with the slope, so that sand particles can slide into the sand collection area without obstacles; the water distribution plate of this embodiment is as Figure 4 Shown.

[0090] This embodiment includes two pool bodies. The two pool bodies are located on both sides of the partition wall 12 and are arranged axisymmetrically with respect to the partition wall. Each pool body is divided into a sand settling area and a slag scraping area by a slag wall. , Where both sides of the partition wall are slag removal areas; the width of the water distributor is such that the water distributor spans at least across the aerated grit and slag-removing tank, and at most across the aerated grit-removal and slag tank body; The slag wall is fixed to the pool wall. The two pools share a water inlet, and the water inlet straddles the partition wall to feed water into the two pools at the same time. The position of the water inlet makes the water flow in from the side of the water distribution plate with the bottom plate along the tangent direction of the arc panel.

[0091] The slag scraping mechanism includes a motor, a transmission chain, a driving wheel, a slag scraping chain, a driven wheel, a chute, and a slag scraper. The motor transmits power to the driving wheel through the transmission chain to drive the slag scraping chain to move, and is located in the slag scraping chain. The slag scraping board on the upper side starts to scrape the slag; the slag scraping mechanism is set above the slag removal area, and the first slag collecting structure is set at the end of the slag removal area to receive the oil slag; the slag scraping mechanism is fixed above the water surface by a bracket to make the The scraper can go deep below the water surface for scraping. In order to enable the slag scraping mechanism to smoothly scrape the scum into the first slag collection structure, a slag guide slope is added at the junction of the slag removal area and the first slag collection structure, and the two wheels closest to the guide slag slope (drive wheel or slave The angle of the connecting line between the driving wheels and the guide slag slope is parallel. The chute is arranged between every two wheels for supporting the slag scraper chain. In this embodiment, since there is a partition wall between the two slag removal areas, a gap is also adaptively provided in the middle of the slag scraper.