Return sludge enrichment device of biochemical system

Abstract

The utility model relates to a return sludge enrichment device of a biochemical system, which is applied to the technical field of sewage treatment and comprises a sedimentation area, transition areas are arranged on two sides of the sedimentation area, and water inlet areas are arranged on one sides, far away from the sedimentation area, of the transition areas; a transition outlet communicated with the bottom of the settlement area is formed in the bottom of the transition area; a water passing opening communicated with the transition area is formed in the side, close to the transition area, of the water inlet area. A water inlet is formed in the bottom of the water inlet area; a drain outlet is formed in the bottom of the settling area, and a water outlet is formed in one side of the settling area. When the sewage treatment device is used, sewage is turned over for multiple times from the water inlet areas on the two sides and finally reaches the settling area, and when sludge in water flow reaches the middle settling area from the water inlet areas on the two sides, the sludge continuously settles under the action of gravity due to slow flow speed and prolonged retention time and is discharged from the sewage outlet, so that the effects of improving the effluent quality and the return sludge concentration are achieved; cost is low and efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially is involved in a biochemical system backflow sludge enrichment device. BACKGROUND

[0002] The core process of urban sewage mostly adopts biochemical treatment method, which converts the organic or even inorganic pollutants in dissolved state, colloidal state and some insoluble state in sewage into stable and harmless substances through the metabolic action of microorganisms, so that the sewage is purified. The activated sludge is the main treatment core of biochemical treatment, and its principle is to use the suspended growth of microbial floc to treat organic sewage by an aerobic treatment method. A series of combined processes are extended based on the activated sludge, such as anoxic-aerobic biological denitrification activated sludge method (ANO), anaerobic-aerobic biological phosphorus removal activated sludge method (APO), anaerobic-anoxic-aerobic activated sludge method (A2O), oxidation ditch method, intermittent activated sludge method and the like.

[0003] However, the microbial floc of the activated sludge has small size, light specific gravity and density close to water, which leads to slow settling speed, poor effluent quality and low utilization rate of sludge backflow.

[0004] Therefore, there is an urgent need for a biochemical system backflow sludge enrichment device to solve the above problems. SUMMARY

[0005] In order to help solve the problems in the prior art, the biochemical system backflow sludge enrichment device provided by the utility model adopts the following technical scheme: a settling zone, transition zones are arranged on both sides of the settling zone, and water inlet zones are arranged on the sides of the transition zones away from the settling zone;

[0006] A transition outlet is arranged at the bottom of the transition zone and penetrates the bottom of the settling zone;

[0007] A water passing port is arranged on the side of the water inlet zone close to the transition zone and penetrates the transition zone, and the height of the water passing port is higher than that of the transition outlet;

[0008] A water inlet is arranged at the bottom of the water inlet zone;

[0009] A sewage discharge port is arranged at the bottom of the settling zone, the height of the sewage discharge port is lower than that of the transition outlet, one side of the settling zone is provided with a water outlet, and the height of the water outlet is higher than that of the transition outlet.

[0010] Further features are that,

[0011] A water outlet cofferdam plate is arranged on the side of the settling zone, the water outlet cofferdam plate and the side of the settling zone form a water outlet ring groove with an upward opening, and the water outlet is located in the water outlet ring groove.

[0012] The top end of the water outlet cofferdam plate is sawtooth-shaped.

[0013] A water outlet pipe is arranged at the water outlet, and a water outlet end of the water outlet pipe extends to the outside of the water inlet area.

[0014] The transition area comprises a first vertical section from top to bottom and a second inclined section extending from the first vertical section to one side of the sedimentation area.

[0015] The water inlet area comprises a second vertical section from top to bottom and a second inclined section extending from the second vertical section to one side of the sedimentation area.

[0016] Two shunt plates extending from bottom to top to the side close to each other are arranged at the sewage outlet, and the top ends of the two shunt plates are connected.

[0017] A plurality of mounting screws are arranged at the outside of the sedimentation area.

[0018] A plurality of bolts are arranged on the mounting screws.

[0019] The sedimentation area, the transition area and the water inlet area are surrounded by steel plates.

[0020] The above structure of the utility model can achieve the following beneficial effects:

[0021] The sewage enters the water inlet area from bottom to top through the water inlets on both sides, enters the transition area through the water passage, enters the sedimentation area through the transition outlet, and is discharged through the water outlet, the settled sludge is discharged through the sewage outlet at the bottom, and the sewage passes through the water inlet area on both sides for multiple times, and finally reaches the sedimentation area, the sludge in the water flow reaches the middle sedimentation area from the water inlet area on both sides, the flow rate is slowed down, the residence time is prolonged, and the sludge is continuously settled under the action of gravity and discharged from the sewage outlet, so that the water quality and the concentration of the returned sludge are improved, the cost is low, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Reference signs: 1, sedimentation area; 2, transition area; 3, water inlet area; 4, transition outlet; 5, water passage; 6, water inlet; 7, sewage outlet; 8, water outlet; 9, water outlet cofferdam plate; 10, water outlet pipe; 11, shunt plate; 12, mounting screw; 13, bolt. DETAILED DESCRIPTION

[0024] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0025] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion, for example, a process, method, device, product or equipment comprising a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0026] The above and other embodiments of the present application will be described in detail below in conjunction with the drawings. Figure 1 The present application will be described in further detail.

[0027] Reference Figure 1 A biochemical system backflow sludge enrichment device, comprising: a sedimentation zone 1, transition zones 2 are arranged on both sides of the sedimentation zone 1, water inlet zones 3 are arranged on the sides of the transition zones 2 away from the sedimentation zone 1;

[0028] The bottom of the transition zone 2 is provided with a transition outlet 4 penetrating the bottom of the sedimentation zone 1;

[0029] The side of the water inlet zone 3 close to the transition zone 2 is provided with a water passing port 5 penetrating the transition zone 2, and the height of the water passing port 5 is higher than the height of the transition outlet 4;

[0030] The bottom of the water inlet zone 3 is provided with a water inlet port 6;

[0031] The bottom of the sedimentation zone 1 is provided with a sewage outlet 7, the height of the sewage outlet 7 is lower than the height of the transition outlet 4, one side of the sedimentation zone 1 is provided with a water outlet 8, and the height of the water outlet 8 is higher than the height of the transition outlet 4.

[0032] Based on the above structure, sewage enters the water inlet zone 3 from the water inlet ports 6 on both sides from bottom to top, enters the transition zone 2 through the water passing port 5, and reaches the sedimentation zone 1 through the transition outlet 4, and clear water is discharged through the water outlet 8 Figure 1The direction of the middle arrow is the sewage flow direction), the settled sludge is discharged through the bottom blow-off port 7, and the sewage passes through multiple folds from the two side water inlet areas 3 and finally reaches the settling area 1. When the sludge in the water flow reaches the middle settling area 1 from the two side water inlet areas 3, the flow rate slows down, the residence time is prolonged, and the sludge continuously settles under the action of gravity and is discharged from the blow-off port 7, achieving the effects of improving the effluent water quality and the concentration of the backflow sludge, low cost, and high efficiency.

[0033] As shown in Figure 1 , the ring side of the settling area 1 is provided with a water outlet cofferdam plate 9, and the water outlet cofferdam plate 9 and the ring side of the settling area 1 form a water outlet ring groove with an opening upward. The water outlet 8 is located in the water outlet ring groove, and the water outlet pipe 10 is provided at the water outlet 8. The water outlet end of the water outlet pipe 10 extends to the outside of the water inlet area 3. In this way, the clear water is flipped over the water outlet cofferdam plate 9 into the water outlet ring groove, and finally discharged through the water outlet pipe 10. In order to improve the water outlet efficiency, the top end of the water outlet cofferdam plate 9 is serrated.

[0034] As shown in Figure 1 , in order to improve the enrichment effect of the sludge, the transition area 2 includes a first vertical section from top to bottom and a second inclined section extending from the first vertical section to one side of the settling area 1. Similarly, the water inlet area 3 includes a second vertical section from top to bottom and a second inclined section extending from the second vertical section to one side of the settling area 1. In this way, by providing the inclined sections (the first inclined section and the second inclined section), the flow rate of the sewage is further reduced, and the settling effect of the sludge is improved.

[0035] As shown in Figure 1 , two diverging plates 11 extending from the bottom to the top to the side close to each other are provided at the blow-off port 7, and the top ends of the two diverging plates 11 are connected. In this way, the settled sludge is diverged by the two diverging plates 11.

[0036] As shown in Figure 1 , in order to facilitate the installation of the device, a plurality of mounting screws 12 are provided on the outside of the settling area 1, and a bolt 13 is provided on each of the plurality of mounting screws 12. The device is mounted on the steel on the top of the biochemical tank by the bolt 13 and the mounting screw 12, which is convenient to install.

[0037] Further optimization is that the settling area 1, the transition area 2 and the water inlet area 3 are surrounded by steel plates, which reduces the production cost, improves the durability and prolongs the service life.

[0038] In summary, sewage enters the water inlet area 3 from the two sides, and then enters the transition area 2 through the water inlet 6, and then enters the settling area 1 through the transition outlet 4, and then the clean water is discharged through the water outlet 8, and the settled sludge is discharged through the bottom sludge outlet 7. The sewage from the two sides of the water inlet area 3 is folded several times, and finally reaches the settling area 1. When the sludge in the water flow reaches the middle settling area 1 from the two sides of the water inlet area 3, the flow rate slows down, the residence time is prolonged, and the sludge continuously settles under the action of gravity and is discharged from the sludge outlet 7. The water quality and the concentration of the returned sludge are improved, the cost is low, and the efficiency is high.

[0039] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A biochemical system backflow sludge enrichment device, characterized by, The utility model relates to a sewage treatment device, including: The both sides of the sedimentation zone (1) are provided with transition zones (2), and the side of the transition zone (2) away from the sedimentation zone (1) is provided with a water inlet zone (3); The bottom of the transition zone (2) is provided with a transition outlet (4) through the bottom of the sedimentation zone (1); The side of the water inlet zone (3) close to the transition zone (2) is provided with a water passageway (5) through the transition zone (2), and the height of the water passageway (5) is higher than the height of the transition outlet (4); The bottom of the water inlet zone (3) is provided with a water inlet (6); The bottom of the sedimentation zone (1) is provided with a sewage outlet (7), and the height of the sewage outlet (7) is lower than the height of the transition outlet (4); one side of the sedimentation zone (1) is provided with a water outlet (8), and the height of the water outlet (8) is higher than the height of the transition outlet (4).

2. The biochemical system return sludge enrichment device according to claim 1, characterized in that: The ring side of the sedimentation zone (1) is provided with a water outlet cofferdam plate (9), and the ring side of the sedimentation zone (1) and the water outlet cofferdam plate (9) form an open upward water outlet ring groove, and the water outlet (8) is located in the water outlet ring groove.

3. The biochemical system return sludge enrichment device according to claim 2, characterized in that: The top end of the water outlet cofferdam plate (9) is serrated.

4. The biochemical system return sludge enrichment device of claim 1, wherein: A water outlet pipe (10) is arranged at the water outlet (8), and the water outlet end of the water outlet pipe (10) extends to the outside of the water inlet zone (3).

5. The biochemical system return sludge enrichment device of claim 1, wherein: The transition zone (2) comprises a first vertical section from top to bottom and a second inclined section inclined to one side of the sedimentation zone (1) from the first vertical section.

6. The biochemical system return sludge enrichment device of claim 5, wherein: The water inlet zone (3) comprises a second vertical section from top to bottom and a second inclined section inclined to one side of the sedimentation zone (1) from the second vertical section.

7. The biochemical system return sludge enrichment device of claim 1, wherein: Two shunt plates (11) extending from bottom to top to each other are arranged at the sewage outlet (7), and the top ends of the two shunt plates (11) are connected.

8. The biochemical system return sludge enrichment device of claim 1, wherein: The outer side of the sedimentation zone (1) is provided with a plurality of mounting screws (12).

9. The biochemical system return sludge enrichment device of claim 8, wherein: A bolt (13) is arranged on each of the plurality of mounting screws (12).

10. The biochemical system return sludge enrichment device of claim 1, wherein: The sedimentation zone (1), the transition zone (2) and the water inlet zone (3) are surrounded by steel plates.

Images