Separating device for water treatment

Abstract

The utility model relates to a separating device for water treatment, which comprises a shell, a plurality of inclined pipes and an effluent weir, a flow guide inclined plane extending along the vertical direction is formed on the outer wall of the shell, a flow guide channel extending along the vertical direction is arranged in the wall of the shell, the top of the flow guide channel is communicated with the outside, and the bottom of the flow guide channel is communicated with the effluent weir. The bottom of the flow guide channel is communicated with an inner cavity of the shell, the bottom of the shell is provided with a mud return opening communicated with the inner cavity, and the mud return opening is inclined relative to the vertical direction; the inclined pipes are arranged in an inner cavity of the shell side by side. The effluent weir is fixedly arranged in the inner cavity of the shell and is arranged at a position above the plurality of inclined pipes; air separation and mud-water separation do not interfere with each other, sludge return is achieved without power, a sludge scraper and a reflux pump are not needed, and the investment and operation cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a separation device for water treatment. Background Technology

[0002] The activated sludge process is the most commonly used treatment technology for organic wastewater. It involves introducing aerobic microorganisms into an aerobic bioreactor (aeration tank) and introducing air to cause aerobic metabolism, which decomposes organic matter into carbon dioxide and water. To obtain relatively clean water, it is necessary to effectively separate the wastewater, sludge, and air after the aerobic reaction.

[0003] Traditionally, a separate secondary sedimentation tank is set up outside the aerobic bioreactor to separate sludge and wastewater, while air separation is carried out in advance inside the bioreactor. Although this can ensure that air separation and sludge-water separation do not interfere with each other, it also requires the installation of equipment such as sludge scrapers and sludge return pumps, which increases investment and operating costs. Moreover, the separation efficiency is relatively low (the surface load is generally no more than 1.0 m3 / m2·h) and the footprint is large.

[0004] To eliminate the drawbacks of secondary sedimentation tanks, some people have replaced them with three-phase separators installed inside bioreactors to achieve three-phase separation of sewage, sludge, and air. However, because the interference of air on sludge-water separation has not been well addressed, the sludge-water separation effect is poor, and the sludge adheres to the air and floats to the surface, easily being lost with the effluent.

[0005] Existing secondary sedimentation tanks suffer from high investment and operating costs and low separation efficiency. Meanwhile, three-phase separators are affected by upward air interference in mud-water separation. In summary, existing water treatment separation devices are unable to achieve low-cost and efficient separation of mud, water, and air. Utility Model Content

[0006] In view of this, it is necessary to provide a separation device for water treatment to solve the problem that existing water treatment separation devices are unable to achieve low-cost and efficient separation of mud, water and gas.

[0007] This utility model provides a separation device for water treatment, including a shell, multiple inclined tubes, and an outlet weir. The outer wall of the shell has a guide slope extending vertically, and the inner wall of the shell has a guide channel extending vertically. The top of the guide channel is connected to the outside, and the bottom of the guide channel is connected to the internal cavity of the shell. The bottom of the shell has a sludge return port that communicates with the internal cavity, and the orientation of the sludge return port is inclined relative to the vertical direction. The multiple inclined tubes are arranged side by side in the internal cavity of the shell. The outlet weir is fixedly installed in the internal cavity of the shell and positioned above the multiple inclined tubes.

[0008] Furthermore, the guiding slope includes an impact slope and a guiding vertical surface arranged sequentially in a vertically upward direction.

[0009] Furthermore, the flow channel includes a vertical channel and an inclined channel arranged sequentially downwards, with the inclined channel pointing obliquely downwards toward the mud return port.

[0010] Furthermore, the outer shell includes two first vertical plates, two first inclined plates, two second vertical plates, and two second inclined plates. The two first vertical plates are arranged opposite each other and their bottoms are fixedly connected to the two first inclined plates respectively. The distance between the two first inclined plates gradually increases in the vertically upward direction. The two second vertical plates are arranged opposite each other and their bottoms are fixedly connected to the two second inclined plates respectively. The distance between the two second inclined plates gradually increases in the vertically upward direction. The outer walls of the two first vertical plates and the two first inclined plates form a flow guiding slope. A portion of the flow guiding channel is formed between the two first vertical plates and the two second vertical plates. Another portion of the flow guiding channel is formed between a portion of the two first inclined plates and the two second inclined plates. A sludge return surface is formed on the other portion of the two first inclined plates near the internal cavity of the outer shell.

[0011] Furthermore, the length of one of the first inclined plates is greater than the length of the other first inclined plate, so as to form the mud return port at the bottom of the two first inclined plates.

[0012] Furthermore, the two second inclined plates are arranged symmetrically, and the two second inclined plates are respectively set parallel to the first inclined plate on the corresponding side.

[0013] Furthermore, the outer casing also includes a mud guide plate, which includes a vertical mud guide plate and a sloping mud guide plate. The vertical mud guide plate and / or the sloping mud guide plate are connected to the outer casing. The vertical mud guide plate is positioned horizontally opposite the mud return port. The bottom of the vertical mud guide plate is fixedly connected to the sloping mud guide plate. The sloping mud guide plate is inclined downwards along the side closest to the mud return port.

[0014] Furthermore, the housing also includes a flow stabilizer plate, which is fixedly disposed in the internal cavity of the housing. The flow stabilizer plate is vertically disposed with its two sides facing the bottom of the two flow guide channels respectively.

[0015] Furthermore, it also includes two slag-separating screens, which are respectively disposed on the top of the two vertical plates.

[0016] Furthermore, it also includes two skimming troughs, which are respectively disposed on the top of the two guide channels and are respectively fixedly connected to the two second vertical plates.

[0017] Compared with existing technologies, because the sludge return port is tilted relative to the vertical direction, the mixture of sludge, sewage, and air moving upward under the action of airflow does not directly enter the sludge return port. Instead, it impacts the guide slope, achieving initial gas separation. The mixture moves upward along the guide slope until it reaches the top of the guide slope, where the gas in the sewage undergoes secondary separation. The gas rises and escapes from the surface of the pool. The sludge and sewage enter the internal cavity of the outer shell through the guide channel. Since the density of sludge is greater than that of water, most of the sludge is discharged from the sludge return port. The small amount of unseparated sludge in the sewage undergoes secondary separation with the sewage as it passes through the inclined tube and sinks to the bottom of the device. The sewage is discharged through the effluent weir. The above-mentioned air separation and sludge-water separation do not interfere with each other, and sludge return is achieved without power. There is no need for a sludge scraper and a return pump, reducing investment and operating costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the water treatment separation device provided in the embodiment of this utility model. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figure 1 As shown, the present invention provides a water treatment separation device, including a shell 100, a plurality of inclined tubes 200 and an outlet weir 300. The outer wall of the shell 100 forms a guide inclined surface 11a extending in the vertical direction. A guide channel 11b extending in the vertical direction is opened in the wall of the shell 100. The top of the guide channel 11b is connected to the outside, and the bottom of the guide channel 11b is connected to the internal cavity 11c of the shell 100. A sludge return port 11d is opened at the bottom of the shell 100, which is connected to the internal cavity 11c and is inclined relative to the vertical direction. The plurality of inclined tubes 200 are arranged side by side in the internal cavity 11c of the shell 100. The outlet weir 300 is fixedly installed in the internal cavity 11c of the shell 100 and is positioned above the plurality of inclined tubes 200.

[0021] During implementation, because the sludge return port 11d is tilted relative to the vertical direction, the mixture of sludge, sewage, and air moving upward under the action of airflow will not directly enter the sludge return port 11d, but will instead impact the guide slope 11a, achieving initial gas separation. The mixture moves upward along the guide slope 11a until it reaches the top of the guide slope 11a, where the gas in the sewage undergoes secondary separation. The gas rises and escapes from the surface of the pool. The sludge and sewage enter the internal cavity 11c of the outer shell 100 through the guide channel 11b. Since the density of sludge is greater than that of water, most of the sludge is discharged from the sludge return port 11d. A small amount of unseparated sludge in the sewage undergoes secondary separation with the sewage during the process of passing through the inclined tube 200 and sinks to the bottom of the device. The sewage is discharged through the effluent weir 300. The above-mentioned air separation and sludge-water separation do not interfere with each other, and sludge return is achieved without power, eliminating the need for a sludge scraper and a return pump, thus reducing investment and operating costs.

[0022] In this embodiment, the outer wall of the outer shell 100 is formed with a guide slope 11a extending in the vertical direction, and a guide channel 11b extending in the vertical direction is opened inside the wall of the outer shell 100. The top of the guide channel 11b is connected to the outside, and the bottom of the guide channel 11b is connected to the internal cavity 11c of the outer shell 100. The bottom of the outer shell 100 is provided with a mud return port 11d that communicates with the internal cavity 11c, and the orientation of the mud return port 11d is inclined relative to the vertical direction.

[0023] In one embodiment, the guide ramp 11a includes an impact ramp and a guide vertical surface arranged sequentially in a vertically upward direction. The mixture of floating sludge, sewage and air first impacts the impact ramp, achieving initial air separation. The mixture then ascends along the guide vertical surface to the top of the guide vertical surface. Since the mixture tends to overflow into the guide channel 11b at this point, secondary air separation is achieved.

[0024] In one embodiment, the guide channel 11b includes a vertical channel and an inclined channel arranged sequentially downwards, with the inclined channel pointing obliquely downwards toward the sludge return port 11d. The mixture after air separation flows downwards through the vertical channel and is then conveyed out through the inclined channel in an oblique downward direction toward the return port. Because the density of sludge is greater than that of water, the wastewater moves vertically upwards, while the sludge moves obliquely downwards, achieving preliminary separation of sludge and wastewater.

[0025] In one embodiment, the outer casing 100 includes two first vertical plates 110, two first inclined plates 120, two second vertical plates 130, and two second inclined plates 140. The two first vertical plates 110 are arranged opposite each other and their bottoms are fixedly connected to the two first inclined plates 120 respectively. The distance between the two first inclined plates 120 gradually increases in the vertically upward direction. The two second vertical plates 130 are arranged opposite each other and their bottoms are fixedly connected to the two second inclined plates 140 respectively. The distance between the two second inclined plates 140 gradually increases in the vertically upward direction. The outer walls of the two first vertical plates 110 and the two first inclined plates 120 form a flow guiding slope 11a. A portion of the flow guiding channel 11b is formed between the two first vertical plates 110 and the two second vertical plates 130. Another portion of the flow guiding channel 11b is formed between a portion of the two first inclined plates 120 and the two second inclined plates 140. A sludge return surface is formed on the other portion of the two first inclined plates 120 and on the side near the internal cavity 11c of the outer casing 100.

[0026] Of course, in other embodiments, the outer shell 100 can also be implemented using a rotating body structure, as long as it can form the above-mentioned flow guiding slope 11a, flow guiding channel 11b, internal cavity 11c and mud return port 11d.

[0027] In one embodiment, the length of one first inclined plate 120 is greater than the length of the other first inclined plate 120, so as to form a sludge return port 11d at the bottom of the two first inclined plates 120. The main function is to block the upward airflow from disturbing the downward sludge, while simultaneously discharging the sludge.

[0028] In one embodiment, the two second inclined plates 140 are arranged symmetrically, and the two second inclined plates 140 are respectively set parallel to the first inclined plate 120 on the corresponding side.

[0029] In one embodiment, the outer casing 100 further includes a sludge guide plate 150, which comprises a vertical sludge guide plate and a sludge guide inclined plate. The vertical sludge guide plate and / or the sludge guide inclined plate are connected to the outer casing 100. The vertical sludge guide plate is positioned horizontally opposite the sludge return port 11d, and its bottom is fixedly connected to the sludge guide inclined plate. The sludge guide inclined plate is inclined downwards along its side closest to the sludge return port 11d. The sludge guide plate 150 can block the upward airflow from disturbing and impacting the descending sludge, while guiding the sludge to the lower part of the aerobic bioreactor.

[0030] In one embodiment, the housing 100 further includes a flow stabilizer 160, which is fixedly disposed in the internal cavity 11c of the housing 100. The flow stabilizer 160 is vertically disposed with its two sides facing the bottom of the two flow channels 11b respectively. The arrangement of the flow stabilizer 160 can stabilize the convection of fluids on the left and right sides and reduce mutual interference.

[0031] In this embodiment, the multiple inclined tubes 200 utilize the principle of shallow sedimentation to improve the efficiency of mud-water separation. The arrangement of the multiple inclined tubes 200 is a structure that can be conceived by those skilled in the art, and will not be elaborated or described in detail.

[0032] In this embodiment, the top of the outlet weir 300 is set 50-100mm below the water surface, and the outlet weir 300 is connected to an outlet pipe for exporting clean water.

[0033] In addition, sewage often inevitably contains some floating debris such as leaves, plastic bags, paper scraps, and ropes. If these debris cannot be effectively isolated, they will entangle the pump impeller and clog the pipes. Therefore, this implementation plan also includes two debris-separating screens 400, which are respectively installed on the top of the two vertical plates.

[0034] The bottom of the slag screen 400 extends about 300mm below the water surface, and its upper end is 200mm above the water surface. Its main function is to intercept large-sized impurities in the sewage and to evenly distribute the water volume in the guide channel 11b.

[0035] On the other hand, wastewater often contains animal fats (such as slaughterhouse wastewater or food processing wastewater) or petroleum substances (such as machinery processing or petrochemical wastewater). If these substances are not removed in a timely manner, the effluent quality will be affected. To address this, this implementation plan also includes two oil skimming troughs 500, which are respectively located at the top of the two guide channels 11b and are fixedly connected to the two second vertical plates 130.

[0036] The top of the oil skimming trough 500 is 50mm below the water surface. An oil drain pipe is installed inside the oil skimming trough 500 to periodically drain the floating oil accumulated in the pool.

[0037] After secondary separation, the gas in the wastewater rises and escapes from the surface of the pool. The scum in the wastewater is intercepted by the scum-separating screen 400. After passing through the scum-separating screen 400, the oily substances, because they are less dense than water and there is no gas disturbance, float to the surface. Once a certain amount is reached, they are periodically discharged through the skimming trough 500 set on the side of the second vertical plate 130. The water flow changes direction by 180 degrees after passing through the scum-separating screen 400 and enters the guide channel 11b, thereby realizing the separation function of scum phase, oil phase, mud phase, water phase and gas phase. That is, this separation device is a five-phase separator.

[0038] Compared with existing technologies:

[0039] 1) Compared with traditional secondary sedimentation tanks and three-phase separators, this device can effectively separate five types of media at the same time: scum, oil, sludge, sewage and gas, achieving multiple functions in one device;

[0040] 2) The five-phase separator and aerobic bioreactor are built into one unit, replacing the traditional separate secondary sedimentation tank, which effectively saves land area;

[0041] 3) This device adopts an asymmetric structural design, which effectively solves the problem of mutual interference in the air separation and mud-water separation processes;

[0042] 4) This device adopts adaptive peripheral water distribution technology, which automatically distributes the water intake from both sides of the device without the need for manual adjustment and control, and can achieve completely uniform water distribution.

[0043] 5) This device adopts self-flocculation sedimentation technology, in which activated sludge in the device undergoes self-aggregation to form large flocs and settles rapidly, with sludge-water separation efficiency being 3 times that of ordinary secondary sedimentation tanks.

[0044] 6) This device adopts self-circulating sludge return technology. The activated sludge is returned to the bioreactor through a non-powered internal circulation, eliminating the need for a sludge scraper and a return pump, thus reducing investment and operating costs.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A separation device for water treatment, characterized in that, include: The outer shell has a vertically extending guide slope on its outer wall. A vertically extending guide channel is provided inside the wall of the outer shell. The top of the guide channel is connected to the outside, and the bottom of the guide channel is connected to the internal cavity of the outer shell. A mud return port is provided at the bottom of the outer shell, which is connected to the internal cavity. The mud return port is inclined relative to the vertical direction. Multiple inclined tubes are arranged side by side in the internal cavity of the outer shell; The water outlet weir is fixedly installed in the internal cavity of the outer shell and positioned above the plurality of inclined tubes.

2. The water treatment separation device according to claim 1, characterized in that, The guiding slope includes an impact slope and a guiding vertical surface arranged sequentially in a vertically upward direction.

3. The water treatment separation device according to claim 1, characterized in that, The flow channel includes a vertical channel and an inclined channel arranged sequentially downwards, with the inclined channel pointing obliquely downwards toward the mud return port.

4. The water treatment separation device according to claim 1, characterized in that, The outer shell includes two first vertical plates, two first inclined plates, two second vertical plates, and two second inclined plates. The two first vertical plates are arranged opposite each other and their bottoms are fixedly connected to the two first inclined plates respectively. The distance between the two first inclined plates gradually increases in the vertically upward direction. The two second vertical plates are arranged opposite each other and their bottoms are fixedly connected to the two second inclined plates respectively. The distance between the two second inclined plates gradually increases in the vertically upward direction. The outer walls of the two first vertical plates and the two first inclined plates form a flow guiding slope. A portion of the flow guiding channel is formed between the two first vertical plates and the two second vertical plates. Another portion of the flow guiding channel is formed between a portion of the two first inclined plates and the two second inclined plates. A sludge return surface is formed on the other portion of the two first inclined plates near the internal cavity of the outer shell.

5. The water treatment separation device according to claim 4, characterized in that, The length of one of the first inclined plates is greater than the length of the other first inclined plate, so as to form the mud return port at the bottom of the two first inclined plates.

6. The water treatment separation device according to claim 4, characterized in that, The two second inclined plates are arranged symmetrically, and the two second inclined plates are set parallel to the first inclined plate on the corresponding side.

7. The water treatment separation device according to claim 4, characterized in that, The outer casing also includes a mud guide plate, which includes a vertical mud guide plate and a sloping mud guide plate. The vertical mud guide plate and / or the sloping mud guide plate are connected to the outer casing. The vertical mud guide plate is positioned horizontally opposite the mud return port. The bottom of the vertical mud guide plate is fixedly connected to the sloping mud guide plate. The sloping mud guide plate is inclined downwards along the side closest to the mud return port.

8. The water treatment separation device according to claim 4, characterized in that, The housing also includes a flow stabilizer plate, which is fixedly disposed in the internal cavity of the housing. The flow stabilizer plate is vertically disposed with its two sides facing the bottom of the two flow guide channels respectively.

9. The water treatment separation device according to claim 4, characterized in that, It also includes two slag-separating screens, which are respectively disposed on the top of the two vertical plates.

10. The separation device for water treatment according to claim 4, characterized in that, It also includes two skimming grooves, which are respectively disposed on the top of the two guide channels and are respectively fixedly connected to the two second vertical plates.

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