CN213012445U - Sewage treatment system - Google Patents

Abstract

The utility model relates to a sewage treatment technical field provides a sewage treatment system. The system comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially communicated, wherein the side wall of the aerobic tank is provided with a first mounting groove in an inward concave manner, a mixed liquid reflux pump is arranged in the first mounting groove, the mixed liquid reflux pump is connected with a water inlet pipe and a water outlet pipe through a switch valve, a water inlet and a water outlet are formed in the first mounting groove corresponding to the water inlet pipe and the water outlet pipe, the water inlet pipe is connected with the aerobic tank, and the water outlet pipe is connected with the; the side wall of the sedimentation tank is concavely provided with a second mounting groove inwards, a sludge reflux pump is arranged in the second mounting groove, the sludge reflux pump is connected with a sludge inlet pipe and a sludge outlet pipe through a switch valve, a sludge inlet and a sludge outlet are formed in the second mounting groove corresponding to the sludge inlet pipe and the sludge outlet pipe, the sludge inlet pipe is connected with the sedimentation tank, and the sludge outlet pipe is connected with the anaerobic tank or the anoxic tank; the sewage is effectively treated, and the failure rate of the sludge reflux pump and the mixed liquid reflux pump is reduced.

Description

Sewage treatment system

Technical Field

The utility model belongs to the technical field of sewage treatment, in particular to sewage treatment system.

Background

With the improvement of the living standard of people in China, the sewage quantity is also greatly increased. The pollution of sewage to water resources has attracted great attention, and particularly, nitrogen and phosphorus which are important nutrient elements of organisms can cause the problem of water eutrophication after entering water along with sewage. With the further improvement of the environmental protection requirement, the removal of nitrogen and phosphorus in the sewage is more and more emphasized.

In the prior art, a biological reaction tank is arranged for sewage treatment, and in the running process of the biological reaction tank, a submersible pump needs to be adopted to lift and return sewage or sludge, but the submersible pump is located at the bottom of the biological reaction tank for a long time and is easily affected by impurities to break down, so that the submersible pump needs to be maintained regularly. The improvement of the biological reaction tank reduces the failure rate of the submersible pump and the maintenance workload of the equipment, which becomes a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage treatment system, effectual sewage is handled, ensures to reduce the fault rate of mud backwash pump and mixed liquid backwash pump simultaneously.

In order to achieve the purpose, the utility model adopts the following technical scheme: a sewage treatment system comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially communicated, wherein the side wall of the aerobic tank is provided with a first mounting groove which is inwards recessed, a mixed liquid reflux pump is arranged in the first mounting groove, the mixed liquid reflux pump is connected with a water inlet pipe and a water outlet pipe through a switch valve, the first mounting groove is provided with a water inlet and a water outlet corresponding to the water inlet pipe and the water outlet pipe, the water inlet pipe is connected with the aerobic tank, and the water outlet pipe is connected with the anaerobic tank or the anoxic tank;

the lateral wall of sedimentation tank is to the sunken mounting groove two that is provided with of inboard, be provided with the mud backwash pump in the mounting groove two, the mud backwash pump is connected with into mud pipe and play mud pipe through the ooff valve, the mounting groove is two to last to correspond advance mud pipe with it has seted up into mud mouth and play mud mouth to go out the mud pipe, advance mud pipe with the sedimentation tank is connected, go out mud pipe with the anaerobism pond or the oxygen deficiency pond is connected.

Optionally, the anaerobic tank and the bottom of the anoxic tank are correspondingly provided with a first perforated pipe and a second perforated pipe, and the water outlet pipe and the sludge outlet pipe extend and are correspondingly connected with the second perforated pipe and the first perforated pipe.

Optionally, the first mounting groove and the second mounting groove are correspondingly provided with a first opening plate and a second opening plate in a matched manner.

Optionally, the first opening plate and the second opening plate are hinged to the first mounting groove and the second mounting groove correspondingly.

Optionally, a first mounting bracket and a second mounting bracket are correspondingly arranged in the first mounting groove and the second mounting groove.

Optionally, the side walls of the first mounting groove and the second mounting groove are correspondingly provided with a first reinforcing rib and a second reinforcing rib, and the first reinforcing rib and the second reinforcing rib are both provided with pipe clamps.

Optionally, a partition plate is arranged in the sedimentation tank, the partition plate and the bottom wall of the sedimentation tank are arranged in a clearance mode, the partition plate divides the sedimentation tank into a buffer zone and a coagulation zone, the upper portion of the buffer zone is communicated with the aerobic tank, and an inclined pipe is arranged on the upper portion of the coagulation zone.

Optionally, the lower part of sedimentation tank is the back taper, mounting groove two set up in the middle part of sedimentation tank, it extends to advance the mud pipe the lower part of sedimentation tank.

Optionally, the aerobic tank is sequentially provided with two aeration rates in the aerobic tanks, the aeration rates in the aerobic tanks are decreased progressively, and the first mounting groove is arranged on the side wall of the aerobic tank with a lower aeration rate.

Optionally, the front end in anaerobism pond is provided with the sieve filtering pond, the upper portion in sieve filtering pond is provided with the sieve filter screen cage, the sieve filter screen cage includes upper plate and hypoplastron, the upper plate with the week side correspondence of hypoplastron is connected with the support column, be connected with the sieve filter screen between the support column, be provided with the water inlet on the upper plate, the lower part in sieve filtering pond is the back taper, top-down is provided with the multilayer grid in the sieve filter screen cage, and the multilayer that top-down set up the aperture of grid reduces gradually.

Compared with the prior art, the side wall of the aerobic tank and the side wall of the sedimentation tank are concavely and correspondingly provided with the first mounting groove and the second mounting groove towards the inner side, the first mounting groove and the second mounting groove are used for arranging the mixed liquid reflux pump and the sludge reflux pump, and the arrangement mode avoids arranging the reflux pump in the tank body, so that the reflux pump can be prevented from being influenced by dirt and impurities in the tank body, and personnel can conveniently overhaul, disassemble and assemble the reflux pump; the first mounting groove and the second mounting groove are arranged in a concave mode towards the inner side relative to the side wall, so that extra space is avoided, the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank are integrally arranged in a rectangular mode, and the structure is reasonable and compact; wherein the switch valve between inlet tube and outlet pipe and mixed liquid backwash pump is in mounting groove one, and the switch valve between mud pipe and play mud pipe and the mud backwash pump is in mounting groove two, and the personnel of also being convenient for like this adjust the flow through the switch valve.

Drawings

FIG. 1 is a schematic view of a sewage treatment system provided by an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a mixed liquor recirculation pump and a sludge recirculation pump;

FIG. 3 is a top view of a screen filter;

figure 4 is a top view of a screen cage.

Reference numerals:

1. an anaerobic tank; 11. a first perforated pipe; 2. an anoxic tank; 21. a second perforated pipe; 3. an aerobic tank; 31. a first mounting groove; 32. a mixed liquid reflux pump; 33. a water inlet pipe; 34. a water outlet pipe; 35. a first plywood is split; 36. mounting a first support; 37. reinforcing ribs I; 4. a sedimentation tank; 41. a second mounting groove; 42. a sludge reflux pump; 43. a mud inlet pipe; 44. a mud outlet pipe; 45. a second plywood; 46. mounting a second bracket; 47. a second reinforcing rib; 401. a buffer area; 402. a coagulation zone; 403. a partition plate; 404. an inclined tube; 5. screening a filter pool; 51. a water outlet filter screen; 52. mounting grooves; 6. a screen cage; 61. an upper plate; 62. a lower plate; 63. a support pillar; 64. screening a filter screen; 65. a grid; 66. a connecting plate; 67. a pipe joint.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

As shown in fig. 1 and 2, the utility model provides a sewage treatment system, including anaerobic tank 1, oxygen deficiency tank 2, aerobic tank 3 and sedimentation tank 4 that communicate the arrangement in order, the lateral wall of aerobic tank 3 is sunken to the inboard and is provided with mounting groove one 31, be provided with mixed liquid backwash pump 32 in mounting groove one 31, mixed liquid backwash pump 32 is connected with inlet tube 33 and outlet pipe 34 through the ooff valve, the mounting groove one 31 is gone up and is seted up water inlet and delivery port corresponding to inlet tube 33 and outlet pipe 34, inlet tube 33 is connected with aerobic tank 3, outlet pipe 34 is connected with anaerobic tank 1 or oxygen deficiency tank 2; the lateral wall of sedimentation tank 4 is provided with two 41 mounting grooves to the inboard sunken side, is provided with the mud backwash pump 42 in the two 41 mounting grooves, and mud backwash pump 42 is connected with into mud pipe 43 and play mud pipe 44 through the ooff valve, corresponds on two 41 mounting grooves and advances mud pipe 43 and play mud pipe 44 and has seted up into mud mouth and play mud mouth, advances mud pipe 43 and is connected with sedimentation tank 4, goes out mud pipe 44 and is connected with anaerobism pond 1 or oxygen deficiency pond 2.

Compared with the prior art, the installation groove I31 and the installation groove II 41 are correspondingly arranged on the side wall of the aerobic tank 3 and the side wall of the sedimentation tank 4 in a concave mode towards the inner side, the installation groove I31 and the installation groove II 41 are correspondingly used for arranging the mixed liquid reflux pump 32 and the sludge reflux pump 42, and the reflux pump is prevented from being arranged in the tank body in the arrangement mode, so that the reflux pump is prevented from being influenced by dirt and impurities in the tank body, and the reflux pump can be conveniently overhauled, disassembled and assembled by personnel; the first mounting groove 31 and the second mounting groove 41 are arranged in a concave manner towards the inner side relative to the side wall, so that extra space is avoided, the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the sedimentation tank 4 are integrally arranged in a rectangular manner, and the structure is reasonable and compact; wherein, the switch valves between the water inlet pipe 33 and the mixed liquid reflux pump 32, the water outlet pipe 34 and the mixed liquid reflux pump 32 are arranged in the first mounting groove 31, and the switch valves between the sludge inlet pipe 43 and the sludge outlet pipe 44 and the sludge reflux pump 42 are arranged in the second mounting groove 41, thereby being convenient for personnel to adjust the flow through the switch valves.

According to the anaerobic tank, the anoxic tank 2 and the aerobic tank 3, the suspended soft biological filler is arranged in the anaerobic tank 1, the suspended soft biological filler further increases the microbial biomass of the system, and improves the processing capacity of the system. The biological filler has strong adsorption capacity, is easy to attach with microorganisms, is suitable for the growth of rich biological communities, forms an ecosystem with longer food chains such as bacteria, algae, protozoa, metazoan and the like, and can efficiently degrade organic pollutants, denitrify and dephosphorize; the biological membrane is high, and is high in biological activity and mass transfer efficiency.

In some embodiments, as shown in fig. 1, the first perforated pipe 11 and the second perforated pipe 21 are disposed at the bottom of the anaerobic tank 1 and the anoxic tank 2, respectively, and the water outlet pipe 34 and the sludge outlet pipe 44 are extended to connect with the second perforated pipe 21 and the first perforated pipe 11, respectively. The mixed liquid of backward flow and the mud of backward flow correspond through mixed liquid backwash pump 32 and mud backwash pump 42 and carry to the bottom in oxygen deficiency pond 2 and anaerobism pond 1, then mixed liquid and mud that have certain power flow out by perforated pipe two 21 and perforated pipe one 11 can disturb oxygen deficiency pond 2 and anaerobism pond 1, make the sewage in oxygen deficiency pond 2 and the anaerobism pond 1 obtain the homogeneous mixing, promote biological reaction reinforcing sewage treatment effect, avoid having adopted agitating unit simultaneously, further reduction the power consumption.

In some embodiments, as shown in fig. 1 and 2, the notches of the first mounting groove 31 and the second mounting groove 41 are correspondingly provided with a first opening plate 35 and a second opening plate 45 in a matching manner; the first opening plate 35 and the second opening plate 45 are hinged with the side edges of the first mounting groove 31 and the second mounting groove 41 correspondingly. The first opening plate 35 and the second opening plate 45 are arranged to protect the mixed liquid reflux pump 32 and the sludge reflux pump 42 to a certain degree, and the hinged mode is adopted to facilitate the opening of personnel.

In some embodiments, as shown in fig. 1 and 2, the first mounting bracket 36 and the second mounting bracket 46 are disposed in the first mounting groove 31 and the second mounting groove 41, respectively. The first mounting bracket 36 and the second mounting bracket 46 play a certain fixing role in the mixed liquid reflux pump 32 and the sludge reflux pump 42, and are convenient for dismounting and mounting the mixed liquid reflux pump 32 and the sludge reflux pump 42.

In some embodiments, as shown in fig. 1 and 2, the first reinforcing rib 37 and the second reinforcing rib 47 are correspondingly arranged on the side walls of the first mounting groove 31 and the second mounting groove 41, and pipe clamps are arranged on both the first reinforcing rib 37 and the second reinforcing rib 47. The first mounting groove 31 and the second mounting groove 41 are arranged in a relatively inwards recessed mode, the structural stability is poor, the first reinforcing ribs 37 and the second reinforcing ribs 47 are arranged to reinforce the first mounting groove 31 and the second mounting groove 41, pipe clamps are arranged on the reinforcing ribs to fix the pipelines, and normal and stable operation of equipment is guaranteed.

In some embodiments, as shown in fig. 1, a partition 403 is disposed in the sedimentation tank 4, the partition 403 is disposed at a gap with the bottom wall of the sedimentation tank 4, the partition 403 divides the sedimentation tank 4 into a buffer zone 401 and a coagulation zone 402, the upper part of the buffer zone 401 is communicated with the aerobic tank 3, and the upper part of the coagulation zone 402 is provided with an inclined pipe 404. Sewage enters the upper part of the buffer zone 401 from the aerobic tank 3, then flows from top to bottom, then enters the coagulation zone 402 to flow from bottom to top, sludge is prevented by the inclined pipe 404 from precipitating, finally the sludge is precipitated to the bottom of the sedimentation tank 4, and the sewage after biological treatment and filtration flows out from the upper part of the coagulation zone 402.

In some embodiments, as shown in fig. 1, the lower portion of the sedimentation tank 4 is in an inverted cone shape, so that sludge can be conveniently collected, the second installation groove 41 is arranged in the middle of the sedimentation tank 4, does not interfere with the inverted cone structure, and is convenient to arrange, the sludge inlet pipe 43 extends to the lower portion of the sedimentation tank 4, and the bottom precipitated sludge is pumped out and flows back to the anaerobic tank 1 or the anoxic tank 2 to supplement activated sludge for the anaerobic tank 1 or the anoxic tank 2.

In some embodiments, as shown in fig. 1, two aerobic tanks 3 are arranged in sequence, and the aeration amount in the two aerobic tanks 3 is decreased gradually, and the mounting groove one 31 is arranged on the side wall of the aerobic tank 3 with lower aeration amount. The aeration rate in the first aerobic tank 3 is sufficient, sewage is aerobic biological reaction is carried out in the first aerobic tank 3 to decompose organic matters and carry out dephosphorization reaction, the aeration rate in the second aerobic tank 3 is low, the remaining sewage can be further decomposed, and the aeration rate is low to play a certain buffer effect at the same time, because the mixed liquid reflux pump 32 is supposed to directly reflux the mixed liquid from the first aerobic tank 3, the oxygen content of the refluxed mixed liquid is high, which is not beneficial to denitrification reaction in the anoxic tank 2, the mixed liquid with low oxygen content is refluxed from the second aerobic tank 3 to the anoxic tank 2, which is beneficial to denitrification reaction, and the denitrification effect of the sewage treatment system is enhanced.

In some embodiments, as shown in fig. 3 and 4, the front end of the anaerobic tank 1 is provided with a screen filter tank 5, the screen filter tank 5 can screen and filter dirt such as sand, large particles, long fibers and the like in advance, the backflow pump is prevented from being blocked by large dirt, the failure rate of the backflow pump is reduced, the upper part of the screen filter tank 5 is provided with a screen filter cage 6, the screen filter cage 6 comprises an upper plate 61 and a lower plate 62, supporting columns 63 are correspondingly connected to the peripheral sides of the upper plate 61 and the lower plate 62, screen screens 64 are connected between the supporting columns 63, a water inlet is formed in the upper plate 61, the lower part of the screen filter tank 5 is in an inverted cone shape, multiple layers of grids 65 are arranged in the screen filter cage 6 from top to bottom, and the pore diameters of the multiple.

Firstly, connecting the lower ends of four support columns 63 with a lower plate 62, arranging connecting plates 66 on the inner sides of the support columns 63, then correspondingly connecting a plurality of layers of grids 65 with the connecting plates 66 by bolts, then installing a screen filter 64 in a matching manner with grooves on the support columns 63, and finally connecting an upper plate 61 with the upper ends of the four support columns 63; sewage enters the screen mesh cage 6 from the pipe joint 67 and flows from top to bottom, dirt is intercepted by different grids 65 from top to bottom from large to small, the dirt can be dispersed to the multiple layers of grids 65, the dirt cannot be gathered at the bottom of the screen mesh cage 6, the dirt cannot block the screen mesh 64, and the screening effect is prevented from being influenced; when the upper plate 61 and the sieve screen 64 on one side are disassembled, the dirt on different grids 65 can be collected correspondingly, and the dirt is conveniently classified and treated.

A water outlet notch is formed in the whole body of the upper part of the sieve filter 5, a water outlet filter screen 51 is installed on the water outlet notch in a matching mode, the upper end of the water outlet notch is open, mounting grooves 52 are formed in two side edges of the water outlet notch, and the mounting grooves 52 are connected with the water outlet filter screen 51 in a matching mode; the sewage is discharged into the anaerobic tank 1 through the water outlet filter screen 51, and the residual sewage is blocked by the water outlet filter screen 51 to be precipitated in the process and is precipitated and gathered to the bottom of the screen filter tank 5 along the lower part of the inverted cone.

The utility model provides a sieve filtering pond 5, anaerobism pond 1, oxygen deficiency pond 2, good oxygen pond 3 and 4 integrated into one piece of sedimentation tank are a box, and when this application sewage treatment system was used for cold area's outdoor when ground, the equipment box outside should set up the heat preservation insulating layer, and the box is from interior to outer structure for resistant time steel box respectively (containing interior outer anticorrosive coating), heat preservation insulating layer, flat steel sheet shell (containing interior outer anticorrosive coating). The heat insulating layer adopts a polyurethane foaming spraying process, and the spraying density is 40kg/m³The conventional spraying thickness is 50mm, and the maximum design thickness can be 130mm according to the environmental requirements of different regions. The equipment box body provided with the heat insulation layer can effectively reduce the heat loss of the sewage and maintain the higher temperature of the sewage, thereby ensuring the treatment effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. A sewage treatment system is characterized in that: the anaerobic tank (1), the anoxic tank (2), the aerobic tank (3) and the sedimentation tank (4) are sequentially communicated and arranged, a first mounting groove (31) is formed in the side wall of the aerobic tank (3) and is sunken towards the inner side, a mixed liquid reflux pump (32) is arranged in the first mounting groove (31), the mixed liquid reflux pump (32) is connected with a water inlet pipe (33) and a water outlet pipe (34) through a switch valve, a water inlet and a water outlet are formed in the first mounting groove (31) corresponding to the water inlet pipe (33) and the water outlet pipe (34), the water inlet pipe (33) is connected with the aerobic tank (3), and the water outlet pipe (34) is connected with the anaerobic tank (1) or the anoxic tank (2);

the lateral wall of sedimentation tank (4) is to the sunken mounting groove two (41) that is provided with to the inboard, be provided with mud backwash pump (42) in mounting groove two (41), mud backwash pump (42) are connected with into mud pipe (43) and play mud pipe (44) through the ooff valve, correspond on mounting groove two (41) advance mud pipe (43) with play mud pipe (44) have been seted up into mud mouth and play mud mouth, advance mud pipe (43) with sedimentation tank (4) are connected, go out mud pipe (44) with anaerobism pond (1) or oxygen deficiency pond (2) are connected.

2. The wastewater treatment system according to claim 1, wherein: the anaerobic tank (1) and the bottom of the anoxic tank (2) are correspondingly provided with a first perforated pipe (11) and a second perforated pipe (21), and the water outlet pipe (34) and the sludge outlet pipe (44) extend correspondingly to be connected with the second perforated pipe (21) and the first perforated pipe (11).

3. The wastewater treatment system according to claim 1, wherein: the mounting groove I (31) and the notch of the mounting groove II (41) are correspondingly provided with a first opening plate (35) and a second opening plate (45) in a matched mode.

4. The wastewater treatment system according to claim 3, wherein: the first opening plate (35) and the second opening plate (45) correspond to the first mounting groove (31) and the side edge of the second mounting groove (41) are hinged.

5. The wastewater treatment system according to claim 1, wherein: and a first mounting bracket (36) and a second mounting bracket (46) are correspondingly arranged in the first mounting groove (31) and the second mounting groove (41).

6. The wastewater treatment system according to claim 1, wherein: the mounting groove I (31) and the side wall of the mounting groove II (41) are correspondingly provided with a reinforcing rib I (37) and a reinforcing rib II (47), and the reinforcing rib I (37) and the reinforcing rib II (47) are both provided with pipe clamps.

7. The wastewater treatment system according to claim 1, wherein: be provided with baffle (403) in sedimentation tank (4), baffle (403) with the diapire clearance of sedimentation tank (4) sets up, baffle (403) will sedimentation tank (4) are separated for buffer zone (401) and coagulation zone (402), the upper portion of buffer zone (401) with good oxygen pond (3) intercommunication, the upper portion of coagulation zone (402) is provided with pipe chute (404).

8. The wastewater treatment system according to claim 7, wherein: the lower part of sedimentation tank (4) is the back taper, mounting groove two (41) set up in the middle part of sedimentation tank (4), it extends to advance mud pipe (43) the lower part of sedimentation tank (4).

9. The wastewater treatment system according to claim 1, wherein: the aeration rate in the two aerobic tanks (3) is gradually decreased, and the first mounting groove (31) is arranged on the side wall of the aerobic tank (3) with lower aeration rate.

10. The wastewater treatment system according to claim 1, wherein: the front end in anaerobism pond (1) is provided with sieve filtering pond (5), the upper portion in sieve filtering pond (5) is provided with sieve filter screen cage (6), sieve filter screen cage (6) are including upper plate (61) and hypoplastron (62), upper plate (61) with week side correspondence of hypoplastron (62) is connected with support column (63), be connected with sieve filter screen (64) between support column (63), be provided with the water inlet on upper plate (61), the lower part in sieve filtering pond (5) is the back taper, top-down is provided with multilayer grid (65) in sieve filter screen cage (6), and the multilayer that top-down set up the aperture of grid (65) reduces gradually.

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