CN215781717U - Sludge discharge system of sedimentation tank - Google Patents
Sludge discharge system of sedimentation tank Download PDFInfo
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- CN215781717U CN215781717U CN202121846496.6U CN202121846496U CN215781717U CN 215781717 U CN215781717 U CN 215781717U CN 202121846496 U CN202121846496 U CN 202121846496U CN 215781717 U CN215781717 U CN 215781717U
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Abstract
The utility model provides a sedimentation tank sludge discharge system which comprises a water inlet pipe, a water inlet area, a sludge discharge pipe, an external reflux pump, a flushing pipe, a flushing connecting pipe, a submersible pump and a digital display time relay, wherein the water inlet area is communicated with the sludge area; the inlet tube passes through flange joint with the sedimentation tank, and the inlet tube sets up with intake zone intercommunication, and mud district sets up in the lower part of sedimentation tank, and the sludge discharge pipe sets up in the below in mud district, and the sludge discharge pipe passes through flange joint with outer backwash pump, and the immersible pump is located the clear water district of sedimentation tank, and the immersible pump couples together through washing connecting pipe and flushing pipe, and digital display time relay is connected with the immersible pump, and opening of digital display time relay control immersible pump stops. According to the sedimentation tank sludge discharge system, the water flow is utilized to disturb sludge accumulated on the side wall of the sludge hopper and sludge in the area above the sludge discharge pipe, so that the sludge bridge is prevented from being suspended and a sludge dead zone is prevented from existing in the sedimentation tank; the problems of low concentration of external reflux sludge and serious sludge leakage phenomenon of the sedimentation tank caused by the instability of a sludge discharge system of the sedimentation tank are solved.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a sludge discharge system of a sedimentation tank, and particularly relates to an improved mode of the sludge discharge system of the sedimentation tank.
Background
The sedimentation tank is commonly used at the tail end of the biochemical treatment tank, the mud-water separation of mud-water mixtures of the biochemical treatment unit is mainly realized through the gravity natural sedimentation effect, supernatant after sedimentation can directly enter inferior treatment or directly be disinfected and discharged, and sludge flows back to the previous biochemical treatment tank through a sludge discharge pipe and an external reflux pump arranged in a sludge hopper area. The stability of the sludge discharge system of the sedimentation tank plays an important role in the whole sewage treatment process, and not only can influence the sludge age, but also can influence the stability of the sludge concentration of the biochemical tank. To evaluate the feasibility of a sewage treatment process, a pilot test study is generally carried out, and the daily treatment capacity of the pilot test study is small (generally less than 100 m)3And d), therefore, a vertical flow sedimentation tank with smaller floor space is often used.
The sedimentation tank in the pilot test is difficult to set up the mud scraper because of the scale is less, and the mud phenomenon of running of sedimentation tank that the mud pipe vacuums to lead to often appears serious and outer backward flow concentration is not enough to maintain biochemical section mud concentration's phenomenon. In the test operation process, operation and maintenance personnel are required to frequently observe the mud level, the concentration of externally returned mud, mud leakage and the like of the sedimentation tank, and the bottom of the sedimentation tank is artificially stirred to relieve the phenomenon that a mud pipe is emptied; the labor intensity of operation and maintenance personnel is increased, and randomness and uncertainty factors are more, so that the operation is not favorable for the stable operation of the sedimentation tank and the whole sewage treatment process.
Disclosed in the patent document with publication number CN210751418U a arrange mud system for small-size sedimentation tank, arrange the mud device including sedimentation tank, mud pipe and drive, the sedimentation tank bottom is the slope form, the mud device is arranged in the drive and is connected with the mud pipe, the mud pipe is responsible for, bottom mud pipe and superficial mud pipe including arranging the mud, arrange the mud and be responsible for the setting in the top of sedimentation tank, the one end of bottom mud pipe and the end connection who arranges the mud and be responsible for, the other end sets up in the deepest department of slope form sedimentation tank bottom, the one end and the row mud of superficial mud pipe are responsible for and are connected, and the other end is provided with the superficial mud and collects the funnel.
In view of the above-mentioned related technologies, the inventor believes that there are problems that the sludge discharge system of the sedimentation tank is unstable, which results in a lower concentration of the sludge flowing back from the sedimentation tank and a serious sludge leakage phenomenon from the sedimentation tank, and therefore, there is a need to provide a technical method for improving the above technical problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a sedimentation tank sludge discharge system.
The sludge discharge system of the sedimentation tank comprises a water inlet pipe, a water inlet area, a sludge discharge pipe, an external reflux pump, a flushing pipe, a flushing connecting pipe, a submersible pump and a digital display time relay, wherein the water inlet area is arranged on the bottom of the sedimentation tank;
the inlet tube passes through flange joint with the sedimentation tank, and the inlet tube sets up with intake zone intercommunication, the mud district sets up the lower part at the sedimentation tank, the sludge discharge pipe sets up in the below in mud district, and the sludge discharge pipe passes through flange joint with outer backwash pump, the immersible pump is located the clear water district of sedimentation tank, and the immersible pump couples together through washing connecting pipe and flushing pipe, digital display time relay is connected with the immersible pump, and opening of digital display time relay control immersible pump stops.
Preferably, the water baffle changes the flowing direction of the mud-water mixture, so that mud-water separation is performed on sludge particles and clean water in the sedimentation tank, the sludge particles enter a sludge area, and the clean water moves upwards to form a clean water area; and a water outlet groove is arranged in the clear water area.
Preferably, the upper part of the sedimentation tank is provided with an ultrahigh height.
Preferably, a mud valve is arranged at the bottom of the sedimentation tank, and an emptying valve is arranged below the mud valve.
Preferably, the external reflux pump is a screw pump.
Preferably, the upper part of the sludge discharge pipe is provided with a first opening and a first plug, and the distance between the first opening close to one side of the first plug is larger than that between the first opening far away from one side of the first plug.
Preferably, the first apertures are in two rows and the direction of the first apertures is inclined 45 ° downwards.
Preferably, the flushing pipe is fixed on the side wall of the sludge bucket through a U-shaped pipe clamp.
Preferably, the upper part of the flushing pipe is provided with a second opening and a second plug, and the distance between the second opening close to one side of the second plug is larger than the distance between the second opening far away from one side of the second plug.
Preferably, the second apertures are in three rows, oriented at 0 °, 90 ° and 270 °.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model constructs an improved mode of a sludge discharge system of a sedimentation tank, and disturbs sludge accumulated on the side wall of a sludge hopper and sludge in an area above a sludge discharge pipe by using water flow, so as to prevent a sludge bridge from suspending and prevent a sludge dead zone in the sedimentation tank;
2. the utility model can solve the problems of low concentration of external reflux sludge and serious sludge leakage phenomenon of the sedimentation tank caused by the instability of a sludge discharge system of the sedimentation tank, and improve the stable operation of the system;
3. the utility model has the advantages of easy realization, low cost, automatic operation, great improvement of the operation stability of the sedimentation tank sludge discharge system and the like;
4. the utility model is suitable for the reconstruction of newly processed sedimentation tanks and sedimentation tank devices.
Drawings
Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of the flush tube of the present invention;
FIG. 3 is a schematic view of the mud pipe of the present invention.
Wherein:
Second opening 81 of flange 2
Flushing connecting pipe 9 for side wall 4 of sludge bucket
Sludge zone 5 submersible pump 10
First opening 61 water guard plate 12
The first plug 62 is ultrahigh 13
U-shaped pipe clamp 15
Blow-off valve 16
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.
The utility model constructs an improved mode of a sludge discharge system of a sedimentation tank, and disturbs sludge accumulated on the side wall of a sludge hopper and sludge in an area above a sludge discharge pipe by using water flow, so as to prevent a sludge bridge from suspending and prevent a sludge dead zone in the sedimentation tank; the improved mode can solve the problems of low concentration of external backflow sludge and serious sludge leakage phenomenon of the sedimentation tank caused by instability of a sludge discharge system of the sedimentation tank, and provides stable operation performance of the system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an optimization mode of a sedimentation tank sludge discharge system, which mainly comprises a water inlet pipe 1, a water inlet area 3, a sludge area 5, a sludge discharge pipe 6, an external reflux pump 7, a flushing pipe 8, a flushing connecting pipe 9, a submersible pump 10 and a digital display time relay 11.
The key points of the structure are as follows: the mud-water mixture in the biochemical tank enters a water inlet area 3 of the sedimentation tank through a water inlet pipe 1, and the water inlet pipe and the sedimentation tank are generally connected through a flange 2; under the action of the water baffle 12, the flow mode of the mud-water mixture is changed into upward flow, the mud-water mixture is subjected to mud-water separation due to the action of gravity in the water flow movement process, sludge particles move downwards to enter the sludge area 5, and clear water moves upwards, so that a clear water area appears at the upper part of the sedimentation tank, and the clear water passes through the triangular weir to enter the water outlet groove 14 and is directly discharged or enters a subsequent treatment unit through the water outlet of the sedimentation tank; in order to prevent the overflow of the sedimentation tank, a part of superelevation 13 is arranged at the upper part of the sedimentation tank; under the action of the external reflux pump 7, sludge with a certain flow enters the sludge discharge pipe 6 and then flows back to the biochemical unit pool in front. The submersible pump 10 is positioned in a clear water area of the sedimentation tank, is connected with the flushing pipe 8 through the flushing connecting pipe 9, and controls the start and stop of the submersible pump by using the digital display time relay 11. The sludge age of the whole sewage treatment system can be controlled by the sludge discharge valve 15, and when the sedimentation tank is overhauled or the sedimentation tank is stopped, the sludge-water mixture in the sedimentation tank can be completely discharged by the emptying valve 16.
The sludge discharge pipe 6 and the external reflux pump 7 are generally connected through flanges; because the sludge concentration in the sludge hopper is higher and the medium viscosity is large, the external reflux pump 7 generally adopts a screw pump; the upper part of the sludge discharge pipe 6 is provided with a first opening 61 and a first plug 62, and the distance between the first openings 61 close to one side of the first plug 62 is larger than that between the first openings 61 far away from one side of the first plug 62; the type of the external reflux pump 7 and the diameter of the first opening 61 are selected to meet the requirement of the external reflux flow of the sludge; the first openings 61 are 2 rows, and the direction of the first openings 61 is 45 ° downward.
The flushing pipe 8 is fixed on the side wall 4 of the sludge hopper through a U-shaped pipe clamp 15; the upper part of the flushing pipe 8 is provided with a second opening 81 and a second plug 82, and the distance between the second openings 81 on the side close to the second plug 82 is larger than the distance between the second openings 81 on the side far from the second plug 82. The submersible pump 10 is flow-patterned and the diameter of the second opening 81 is selected to ensure a sufficiently large flow rate of the outlet water, the second opening 81 having 3 rows, i.e. 0 °, 90 ° and 270 ° directions. When the submersible pump operates, the water flow ejected by the second opening 81 disturbs the sludge accumulated on the side wall 4 of the sludge hopper and the sludge in the area above the sludge discharge pipe, so that the sludge bridging is prevented from being suspended and a sludge dead zone is prevented from existing in the sedimentation tank. When the submersible pump stops running, sludge particles enter the sludge hopper under the action of gravity, and then are pumped out of the sedimentation tank by the sludge discharge pipe 6 and flow back to the biochemical tank at the front section.
The utility model provides an improved mode of a sludge discharge system of a sedimentation tank, which disturbs sludge accumulated on the side wall of a sludge hopper and sludge in an area above a sludge discharge pipe by using water flow, and prevents sludge bridging from suspending and sludge dead zones in the sedimentation tank; the improved mode can solve the problems of low concentration of the external reflux sludge and serious sludge leakage phenomenon of the sedimentation tank caused by the instability of the sludge discharge system of the sedimentation tank. The system can be used for newly-processed sedimentation tanks and can also be used for transforming the existing sedimentation tanks, is easy to realize, has low cost and automatic operation, and greatly improves the operation stability of the sludge discharge system of the sedimentation tanks.
The utility model is easy to realize, and has low cost: the structure of the sedimentation tank is not damaged, and only 2 flushing pipes, 2 flushing connecting pipes, 1 submersible pump and 1 time relay are needed to be added; automatic operation: the digital display time relay is used for automatically controlling the starting and stopping of the submersible pump, so that the labor intensity of operation and maintenance personnel is greatly reduced; improve sedimentation tank row mud system operating stability: the water flow jetted by the opening of the flushing pipe disturbs the sludge at variable time, so that a sludge dead zone in the sedimentation tank and sludge floating caused by nitrogen generated by denitrification in an anoxic environment can be avoided; meanwhile, the sludge in the sludge discharge pipe area can be prevented from being pumped out, the sufficiently high concentration of the external reflux sludge is ensured, and the stable operation of the sedimentation tank and the whole sewage treatment process is maintained.
In a specific embodiment of the utility model, the inner diameter of the sludge discharge pipe is 45mm, the effective open pore length is 1000mm, the open pore diameter is 10mm, the open pore distance of 0.5m close to the plug is 20mm, and the open pore distance of 0.5m far away from the plug is 10 mm; rated flow 2m of external reflux pump3/h。
In a specific embodiment of the utility model, the included angle between the side wall of the sludge hopper and the bottom of the sedimentation tank is 60 degrees, the inner diameter of the flushing pipe is 25mm, the effective open pore length is 1000m, the open pore diameter is 5mm, the open pore distance of 0.5m close to the plug is 20mm, and the open pore distance of 0.5 away from the plug is 10 mm; rated flow of the submersible pump is 8m3H is used as the reference value. The flushing connecting pipe is a hose and is connected with the outlet of the submersible pump and the water inlet of the flushing pipe through a metal hoop.
In one embodiment of the utility model, the distance between the water outlet groove of the sedimentation tank and the bottom of the sedimentation tank is 2.1m, the submersible pump is arranged at a position 0.3m below the water outlet groove, the digital display time relay is set to start the submersible pump for 1 minute every 29 minutes, the concentration of the external reflux sludge is basically stable, and the evacuation phenomenon hardly exists.
In the description of the present application, it is to be understood that the terms "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, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A sedimentation tank sludge discharge system is characterized by comprising a water inlet pipe (1), a water inlet area (3), a sludge area (5), a sludge discharge pipe (6), an external reflux pump (7), a flushing pipe (8), a flushing connecting pipe (9), a submersible pump (10) and a digital display time relay (11);
inlet tube (1) is connected through flange (2) with the sedimentation tank, and inlet tube (1) and intake zone (3) intercommunication set up, mud district (5) set up the below at the sedimentation tank, sludge discharge pipe (6) set up the below in mud district (5), and sludge discharge pipe (6) and outer backwash pump (7) are connected through flange (2), immersible pump (10) are located the clear water district of sedimentation tank, and immersible pump (10) are connected through washing connecting pipe (9) and flushing pipe (8), digital display time relay (11) are connected with immersible pump (10), and digital display time relay (11) control immersible pump (10) open and stop.
2. The sedimentation tank sludge discharge system according to claim 1, wherein a water baffle (12) is further arranged in the water inlet area (3), the water baffle (12) changes the flow direction of the sludge-water mixture, sludge particles and clean water are promoted to be subjected to sludge-water separation in the sedimentation tank, the sludge particles enter the sludge area, and the clean water moves upwards to form a clean water area; a water outlet groove (14) is arranged in the clear water area.
3. A sedimentation tank sludge discharge system according to claim 1, wherein the upper part of the sedimentation tank is provided with an ultra-high (13).
4. A sedimentation tank sludge discharge system according to claim 1, wherein a sludge discharge valve (15) is arranged at the bottom of the sedimentation tank, and an air release valve (16) is arranged below the sludge discharge valve (15).
5. The sedimentation tank sludge discharge system according to claim 1, wherein the external reflux pump (7) is a screw pump.
6. A sedimentation tank sludge discharge system according to claim 1, wherein the sludge discharge pipe (6) is provided with a first opening (61) and a first plug (62) at the upper part, and the distance between the first openings (61) at the side close to the first plug (62) is larger than the distance between the first openings (61) at the side far away from the first plug (62).
7. A sedimentation tank sludge discharge system according to claim 6, wherein the first apertures (61) are in two rows and the direction of the first apertures (61) is inclined 45 ° downwards.
8. A sedimentation tank sludge discharge system according to claim 1, wherein the flushing pipe (8) is fixed to the sludge hopper side wall (4) by a U-shaped pipe clamp.
9. A sedimentation tank sludge discharge system according to claim 1, wherein the upper part of the flushing pipe (8) is provided with a second opening (81) and a second plug (82), and the distance between the second openings (81) on the side close to the second plug (82) is larger than the distance between the second openings (81) on the side far from the second plug (82).
10. A sedimentation tank sludge discharge system according to claim 9, wherein the second openings (81) are three rows with directions of 0 °, 90 ° and 270 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121846496.6U CN215781717U (en) | 2021-08-09 | 2021-08-09 | Sludge discharge system of sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121846496.6U CN215781717U (en) | 2021-08-09 | 2021-08-09 | Sludge discharge system of sedimentation tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215781717U true CN215781717U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121846496.6U Active CN215781717U (en) | 2021-08-09 | 2021-08-09 | Sludge discharge system of sedimentation tank |
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| CN (1) | CN215781717U (en) |
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2021
- 2021-08-09 CN CN202121846496.6U patent/CN215781717U/en active Active
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