CN107253759B

CN107253759B - Decanter for urban sewage treatment system

Info

Publication number: CN107253759B
Application number: CN201710691714.5A
Authority: CN
Inventors: 王俊铎
Original assignee: Yatai Pump Valve Co ltd
Current assignee: YATAI PUMP VALVE Co.,Ltd.
Priority date: 2017-08-14
Filing date: 2017-08-14
Publication date: 2020-08-28
Anticipated expiration: 2037-08-14
Also published as: CN107253759A

Abstract

The invention discloses a decanter for an urban sewage treatment system, which comprises a lifting rod, wherein the lifting rod drives a decanting cylinder to move up and down, water inlets are formed in two ends of the decanting cylinder, the middle of the decanting cylinder is communicated with a drain pipe, a rotating shaft is fixed in the water inlets through a mounting frame, blades are mounted on the rotating shaft, an annular slot is formed in the outer side of each water inlet, an annular filter screen is inserted in the annular slot, the blades are in clearance fit with the annular filter screen, and a filter cartridge is arranged at the joint of the decanting cylinder and the drain pipe. The invention can improve the defects of the prior art, and does not influence the normal decanting flow while filtering the silt and the scum.

Description

Decanter for urban sewage treatment system

Technical Field

The invention relates to a municipal sewage treatment device, in particular to a decanter for a municipal sewage treatment system.

Background

SBR is a short name of a sequencing batch activated sludge process, and is an activated sludge sewage treatment technology which operates in an intermittent aeration mode. Its main feature is the orderly and intermittent operation on the operation. The decanter is a core device of the SBR reaction tank, is arranged in the SBR reaction tank, and is adjusted to lift according to the water level change, thereby ensuring that only upper clear water is discharged without carrying sludge and scum in the working process. Chinese patent application CN 105217787 a discloses a rotary decanter that reduces the problems of sludge and sludge running by using filter cloth. However, the decanter reduces the decanting flow rate due to the adhesion of silt and scum on the surface of the filter cloth during the filtering process.

Disclosure of Invention

The invention aims to provide a decanter for an urban sewage treatment system, which can overcome the defects of the prior art and does not influence the normal decanting flow while filtering silt and scum.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The utility model provides a decanter for urban sewage treatment system, includes the lifter, and the lifter drives and strains the water drum and reciprocate, strain the both ends of water drum and be provided with the water inlet, strain the middle part of water drum and communicate with the drain pipe, is fixed with the rotation axis through the mounting bracket in the water inlet, installs the blade on the rotation axis, and the water inlet outside is provided with annular slot, and annular slot interpolation has connect annular filter screen, and blade and annular filter screen clearance fit, strain the junction of water drum and drain pipe and be provided with a section of thick bamboo.

Preferably, the surface of each blade is provided with a guide groove which is parallel to the axial direction of the blade, the edge of each guide groove is connected with the edge of the blade through a torsion spring, and the included angle between each blade and each guide groove is 45 degrees.

Preferably, an inclined plane part inclining downwards is arranged at the interface of the guide groove and the outer side end of the blade, the included angle between the inclined plane part and the guide groove is 55 degrees, the inclined plane part is communicated with the guide groove through a first through hole, and the ratio of the interface diameter of the first through hole and the guide groove to the interface diameter of the first through hole and the inclined plane part is 3: 1.

Preferably, a plurality of grids are uniformly arranged on the annular filter screen, a plurality of parallel partition plates are arranged at the bottoms of the grids in a staggered mode, a metal wire mesh layer is arranged above the partition plates, adjacent grids are communicated through second through holes, a filter plate is arranged above the metal wire mesh layer, a plurality of blind holes are uniformly arranged in the filter plate, the side wall of each blind hole is connected with a third through hole penetrating through the filter plate, the included angle between each blind hole and each partition plate is 60 degrees, and the third through holes are perpendicular to the partition plates.

Preferably, the surface of the filter plate is provided with spiral grooves, the direction of the spiral groove on any one ring filter screen is right-handed, and the direction of the spiral groove on the other ring filter screen is left-handed.

Preferably, the side wall of the filter cylinder is provided with a filter cotton layer, the center of the filter cylinder is provided with a support, the top of the support is hinged with a plurality of baffles, and a first spring body is connected between each baffle and the support.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, two stages of filtering devices are respectively arranged in the water inlet and the water discharge pipe to carry out two-stage filtering on the discharged water, so that the quality of the discharged water is ensured. Annular filter screen is as first order filter equipment, and rivers that intake promote the blade rotation, and the guiding gutter on the blade drives rivers and flows to the annular filter screen of outside to realize that annular filter screen filters the first order of rivers. The inclined plane part at the tail end of the diversion trench can increase the diffusion area of water flow. And part of water flows flow out through the first through holes and meets the water flow flowing out from the inclined plane part, so that the dispersion degree of the water flow on the surface of the annular filter screen can be improved. The blades on the blades can prevent scum from being wound on the blades, and the good flow guiding performance of the blades is maintained. Annular filter screen divide into two-layer filtration, and the baffle of bottom has formed an area that gathers silt, can collect silt, and the wire mesh layer is used for catching the dross and collects, and rivers flow downwards from annular filter screen's top, then flow from the second through-hole, and whole in-process dross and silt can be filtered the interception by annular filter screen. The water flow flowing out of the diversion trench changes the flow direction between the blind hole and the third through hole, so that the bottom of the blind hole can preliminarily filter and collect silt and scum. The spiral grooves on the surface of the filter plate can enable water inflow at two ends to rotate in opposite directions, so that turbulent flow is formed at the outlet of the drain pipe, and the filtering effect of the filter cotton layer is improved. The baffle carries out the recoil to the drainage, improves the contact time of drainage rivers and filter cotton layer. The first spring body can be synchronously deformed according to the strength of the water flow impact baffle, so that the angle of the baffle is changed, the baffle is contracted to ensure the normal water flow when the flow speed is high, and the water flow is small, and the back-flushing effect is ensured by the expansion of the baffle.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a block diagram of a blade in accordance with an embodiment of the present invention.

Fig. 3 is a structural view of a guide groove according to an embodiment of the present invention.

Fig. 4 is a block diagram of an annular screen in an embodiment of the present invention.

Figure 5 is a block diagram of a filter cartridge according to an embodiment of the present invention.

In the figure: 1. a lifting rod; 2. decanting the water cylinder; 3. a water inlet; 4. a drain pipe; 5. a mounting frame; 6. a rotating shaft; 7. a blade; 8. an annular slot; 9. an annular filter screen; 10. a filter cartridge; 11. a diversion trench; 12. a torsion spring; 13. a blade; 14. an inclined plane part; 15. a first through hole; 16. a grid; 17. a partition plate; 18. a second through hole; 19. filtering the plate; 20. blind holes; 21. a third through hole; 22. a spiral groove; 23. a filter cotton layer 24, a bracket 25 and a baffle; 26. a first spring body; 27. a slide bar; 28. a second spring body; 29. a support frame; 30. a cavity; 31. a flow deflector; 32. a wire mesh layer.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1-5, one embodiment of the invention includes a lifting rod 1, the lifting rod 1 drives a decanting cylinder 2 to move up and down, water inlets 3 are arranged at two ends of the decanting cylinder 2, the middle of the decanting cylinder 2 is communicated with a drain pipe 4, a rotating shaft 6 is fixed in the water inlets 3 through a mounting frame 5, blades 7 are mounted on the rotating shaft 6, an annular slot 8 is arranged outside the water inlets 3, an annular filter screen 9 is inserted in the annular slot 8, the blades 7 are in clearance fit with the annular filter screen 9, and a filter cylinder 10 is arranged at the joint of the decanting cylinder 2 and the drain pipe 4. The surface of the blade 7 is provided with a diversion trench 11 which is parallel to the axial direction of the blade, a plurality of blades 13 are connected between the edge of the diversion trench 11 and the edge of the blade 7 through torsion springs 12, and the included angle between each blade 13 and the diversion trench 11 is 45 degrees. An inclined surface part 14 which inclines downwards is arranged at the interface of the guide groove 11 and the outer side end of the blade 7, the included angle between the inclined surface part 14 and the guide groove 11 is 55 degrees, the inclined surface part 14 is communicated with the guide groove 11 through a first through hole 15, and the ratio of the interface diameter of the first through hole 15 and the guide groove 11 to the interface diameter of the first through hole 15 and the inclined surface part 14 is 3: 1. Evenly be provided with a plurality of net 16 on the annular filter screen 9, the crisscross baffle 17 that is parallel to each other that is provided with in net 16 bottom, baffle 17 top is provided with wire mesh layer 32, communicate through second through-hole 18 between the adjacent net 16, wire mesh layer 32 top is provided with filter plate 19, evenly be provided with a plurality of blind hole 20 in the filter plate 19, the blind hole 20 lateral wall is connected with the third through-hole 21 that runs through filter plate 19, the blind hole 20 is 60 with the contained angle of baffle 17, third through-hole 21 and baffle 17 mutually perpendicular. The surface of the filter plate 19 is provided with spiral grooves 22, the direction of the spiral groove 22 on any one annular filter screen 9 is right-handed, and the direction of the spiral groove 22 on the other annular filter screen 9 is left-handed. The side wall of the filter cartridge 10 is provided with a filter cotton layer 23, the center of the filter cartridge 10 is provided with a bracket 24, the top of the bracket 24 is hinged with a plurality of baffles 25, and a first spring body 26 is connected between the baffles 25 and the bracket 24.

In addition, a slide rod 27 is fixed on the rotating shaft 6, the outer side of the slide rod 27 is movably sleeved with the blade 7, and the blade 7 is connected with the slide rod 27 through a second spring body 28. The blades 7 can slide on the sliding rods 17 along with the flow velocity of water flow, so that the distance between the blades 7 and the annular filter screen 9 can be synchronously adjusted according to the flow velocity of water flow, and the uniformity of water flow distribution on the surface of the annular filter screen 9 is improved.

The filtering cotton layer 23 is fixed on the outer side of the supporting frame 29, the supporting frame 29 is of a double-layer structure, a cavity 30 is arranged in the middle of the supporting frame 29, and a plurality of flow deflectors 31 are arranged in the cavity 30. When water flows through the filtering cotton layer 23, the blocking of the flow deflector 31 is received in the cavity 30, turbulent flow is generated in the cavity 30, and the contact filtering effect of the water flow and the filtering cotton layer 23 can be improved.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a decanter for urban sewage treatment system, includes lifter (1), lifter (1) drive decant cylinder (2) and reciprocate, its characterized in that: the water inlet (3) is arranged at two ends of the water decanting cylinder (2), the middle of the water decanting cylinder (2) is communicated with the drain pipe (4), a rotating shaft (6) is fixed in the water inlet (3) through a mounting frame (5), blades (7) are installed on the rotating shaft (6), an annular slot (8) is arranged at the outer side of the water inlet (3), an annular filter screen (9) is inserted in the annular slot (8), the blades (7) are in clearance fit with the annular filter screen (9), and a filter cylinder (10) is arranged at the joint of the water decanting cylinder (2) and the drain pipe (4);

the side wall of the filter cylinder (10) is provided with a filter cotton layer (23), the center of the filter cylinder (10) is provided with a support (24), the top of the support (24) is hinged with a plurality of baffles (25), and a first spring body (26) is connected between the baffles (25) and the support (24);

the surface of the blade (7) is provided with a flow guide groove (11) which is parallel to the axial direction of the blade, a plurality of blades (13) are connected between the edge of the flow guide groove (11) and the edge of the blade (7) through torsion springs (12), and the included angle between each blade (13) and the flow guide groove (11) is 45 degrees;

an inclined plane part (14) which inclines downwards is arranged at the interface of the guide groove (11) and the outer side end of the blade (7), the included angle between the inclined plane part (14) and the guide groove (11) is 55 degrees, the inclined plane part (14) is communicated with the guide groove (11) through a first through hole (15), and the ratio of the interface diameter of the first through hole (15) and the guide groove (11) to the interface diameter of the first through hole (15) and the inclined plane part (14) is 3: 1;

a plurality of grids (16) are uniformly arranged on the annular filter screen (9), a plurality of parallel partition plates (17) are arranged at the bottoms of the grids (16) in a staggered mode, a metal wire mesh layer (32) is arranged above each partition plate (17), adjacent grids (16) are communicated through second through holes (18), a filter plate (19) is arranged above each metal wire mesh layer (32), a plurality of blind holes (20) are uniformly arranged in each filter plate (19), the side wall of each blind hole (20) is connected with a third through hole (21) penetrating through each filter plate (19), the included angle between each blind hole (20) and each partition plate (17) is 60 degrees, and each third through hole (21) is perpendicular to each partition plate (17);

spiral grooves (22) are formed in the surface of the filter plate (19), the direction of the spiral groove (22) on any one annular filter screen (9) is right-handed, and the direction of the spiral groove (22) on the other annular filter screen (9) is left-handed.