CN213327186U - Up-flow biological nitrogen and phosphorus removal sewage treatment device - Google Patents
Up-flow biological nitrogen and phosphorus removal sewage treatment device Download PDFInfo
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- CN213327186U CN213327186U CN202021201639.3U CN202021201639U CN213327186U CN 213327186 U CN213327186 U CN 213327186U CN 202021201639 U CN202021201639 U CN 202021201639U CN 213327186 U CN213327186 U CN 213327186U
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Abstract
An up-flow biological nitrogen and phosphorus removal sewage treatment device comprises an anaerobic-anoxic reaction tank, wherein a sewage inlet pipeline is arranged on the side edge of the anaerobic-anoxic reaction tank; the anaerobic-anoxic reaction tank is connected with the aerobic reaction tank through a mixed liquid self-flowing pipeline, an intermediate lift pump is arranged in the aerobic reaction tank, and a mixed liquid reflux pipeline and a mixed liquid pressure output pipeline are connected in parallel at the output end of the intermediate lift pump; the mixed liquid pressure output pipeline conveys water in the aerobic reaction tank to a vertical flow type mud-water separation and precipitation unit; the utility model discloses simple structure, the operation is safe, and the operation level requires lowly and is convenient for maintain. Compared with the prior art, the problems of high arrangement cost, high requirement on the operating environment, difficult maintenance and the like in the prior art are solved; the upflow type design, the single pump body lifting design, the liquid level arrangement and the mechanical valve can greatly reduce the power consumption, save the operation cost, and have small occupied area and low construction cost.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to an upflow biological nitrogen and phosphorus removal sewage treatment plant.
Background
The elevation arrangement of each unit of sewage treatment determines the horizontal elevation difference of each treatment unit in the normal running state, and ensures that reaction fluid in the units flows smoothly. The front-to-back elevation arrangement of each treatment unit of the existing sewage biological treatment device is generally in a gravity flow mode from high to low, namely sewage flows from a high-level liquid level unit to a low-level liquid level unit automatically in sequence under a normal operation state. The method has more defects, wherein the most important is that the arrangement mode needs more power and pressure transmission devices, generally comprises pump devices such as a mixed liquid internal reflux conveying device, a residual sludge discharge conveying device and an external reflux conveying device, and if the sewage biological treatment needs reclaimed water recycling or third-level advanced treatment, a reclaimed water recycling power conveying device or a secondary lifting power conveying device is added to realize system operation. The device has high arrangement cost, high requirement on operating environment, high cost caused by high power consumption and more difficult maintenance. Secondly, the liquid level of the sludge-water precipitation separation unit is the lowest in the arrangement mode, and only the advection type or radial type sludge-water separation and precipitation device which has lower height requirement but larger floor area can be selected. The requirement on the arrangement condition is too high, the occupied area is large, and the construction cost and the maintenance cost are correspondingly improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the prior art weak point, provide a simple structure, the operation is safe, and the operation level requires low and be convenient for an upflow biological nitrogen and phosphorus removal sewage treatment plant who maintains.
The device comprises an anaerobic-anoxic reaction tank, wherein a sewage inlet pipeline is arranged on the side edge of the anaerobic-anoxic reaction tank;
the anaerobic-anoxic reaction tank is connected with the aerobic reaction tank through a mixed liquid self-flowing pipeline, an intermediate lift pump is arranged in the aerobic reaction tank, and a mixed liquid backflow pipeline and a mixed liquid pressure output pipeline are connected in parallel at the output end of the intermediate lift pump. Wherein the mixed liquid backflow pipeline flows water in the aerobic reaction tank back to the anaerobic reaction tank, and the mixed liquid pressure output pipeline conveys the water in the aerobic reaction tank to the vertical-flow type mud-water separation and precipitation unit.
The side wall of the upper part of the vertical type mud-water separation and precipitation unit is provided with a water outlet pipeline, and the bottom of the vertical type mud-water separation and precipitation unit is provided with a sludge treatment pipeline and a sludge return pipeline in parallel. The sludge treatment pipeline discharges sludge into a sludge treatment terminal, and the sludge return pipeline discharges returned sludge to the anaerobic reaction tank.
Furthermore, the anaerobic reaction tank is divided into an anaerobic reaction tank and an anoxic reaction tank by a partition, and water in the anaerobic reaction tank flows into the anoxic reaction tank in an overflow mode.
Further, in the operation process, the water level of the vertical flow type mud-water separation and precipitation unit is higher than that of the anaerobic reaction tank, the water level of the anaerobic reaction tank is higher than that of the anoxic reaction tank, and the water level of the anoxic reaction tank is higher than that of the aerobic reaction tank.
Furthermore, the tail end of the mixed liquid return pipeline and the tail end of the sludge return pipeline are respectively provided with a ball float valve, so that the on-off of the liquid level control pipeline is realized; the mixed liquid pressure output pipeline is provided with a one-way valve to prevent the mixed liquid from flowing back; the sludge treatment pipeline is provided with a throttle valve to control the flow of sludge.
Further, the specific implementation steps of the equipment are as follows: after sewage enters the anaerobic reaction tank for reaction, the sewage enters the anoxic reaction tank in an overflow mode, the sewage in the anoxic reaction tank enters the aerobic reaction tank through a mixed liquid flowing pipeline after the sewage reacts, namely, the pipeline between the anoxic reaction tank and the aerobic reaction tank is communicated, the bottom of the aerobic reaction tank is provided with an intermediate lift pump, the sewage in the aerobic reaction tank is subjected to lifting control, the liquid level of the sewage is always lower than that of the anoxic reaction tank, one part of the mixed liquid lifted by the intermediate lift pump enters the anoxic reaction tank again through a mixed liquid backflow pipeline, and the other part of the mixed liquid enters the vertical flow type mud-water separation and precipitation unit through a mixed liquid pressure output pipeline. The water at the upper part of the vertical flow type mud-water separation and precipitation unit is discharged through a water outlet pipeline, one part of sludge at the bottom of the vertical flow type mud-water separation and precipitation unit flows into a sludge treatment terminal through a sludge treatment pipeline by gravity flow, and the other part of sludge flows into an anaerobic reaction tank again through a sludge return pipeline by gravity flow;
the utility model has the advantages that: the utility model discloses simple structure, the operation is safe, and the operation level requires lowly and is convenient for maintain. Compared with the prior art, the problems of high arrangement cost, high requirement on the operating environment, difficult maintenance and the like in the prior art are solved; the upflow type design, the single pump body lifting design, the liquid level arrangement and the mechanical valve can greatly reduce the power consumption, save the operation cost, and have small occupied area and low construction cost.
Drawings
FIG. 1 is a schematic structural view of an upflow biological denitrification and dephosphorization wastewater treatment device according to the present invention;
reference numerals:
1-sewage inlet pipeline 2-anaerobic reaction tank 3-sludge return pipeline 4-intermediate lift pump 5-sludge treatment terminal 6-sludge treatment pipeline 7-water outlet pipeline 8-vertical type mud-water separation and precipitation unit 9-one-way valve 10-mixed liquid pressure output pipeline 11-aerobic reaction tank 12-mixed liquid return pipeline 13-anoxic reaction tank 14-floating ball valve
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
Referring to fig. 1, the upflow biological nitrogen and phosphorus removal sewage treatment device of the utility model comprises an anaerobic-anoxic reaction tank, wherein a sewage inlet pipeline 1 is arranged at the side of the anaerobic-anoxic reaction tank;
the anaerobic-anoxic reaction tank is connected with the aerobic reaction tank 11 through a mixed liquid self-flowing pipeline, an intermediate lift pump 4 is arranged in the aerobic reaction tank 11, and the output end of the intermediate lift pump 4 is connected with a mixed liquid return pipeline 12 and a mixed liquid pressure output pipeline 11 in parallel. Wherein the mixed liquid reflux pipeline 12 refluxes the water in the aerobic reaction tank 11 to the anaerobic reaction tank, and the mixed liquid pressure output pipeline 10 conveys the water in the aerobic reaction tank 11 to the vertical flow type mud-water separation and precipitation unit 8.
The side wall of the upper part of the vertical type mud-water separation and precipitation unit 8 is provided with a water outlet pipeline 7, and the bottom of the vertical type mud-water separation and precipitation unit is provided with a sludge treatment pipeline 6 and a sludge return pipeline 3 in parallel. The sludge treatment pipeline 6 discharges sludge into the sludge treatment terminal 5, and the sludge return pipeline 3 discharges returned sludge to the anaerobic reaction tank.
Further, the anaerobic-anoxic reaction tank is divided into an anaerobic reaction tank 2 and an anoxic reaction tank 13 by a partition, and water in the anaerobic reaction tank 2 flows into the anoxic reaction tank 13 in an overflow mode.
Further, in the operation process, the water level of the vertical flow type mud-water separation and precipitation unit 8 is higher than the water level of the anaerobic reaction tank 2, the water level of the anaerobic reaction tank 2 is higher than the water level of the anoxic reaction tank 13, and the water level of the anoxic reaction tank 13 is higher than the water level of the aerobic reaction tank 11.
Furthermore, the tail end of the mixed liquid return pipeline 12 and the tail end of the sludge return pipeline 3 are respectively provided with a ball float valve 14, so that the on-off of the liquid level control pipeline is realized; the mixed liquid pressure output pipeline 11 is provided with a one-way valve 9 to prevent the mixed liquid from flowing back; the sludge treatment pipeline 6 is provided with a throttle valve to control the flow of sludge.
Further, the specific implementation steps of the equipment are as follows: after sewage enters the anaerobic reaction tank 2 for reaction, the sewage enters the anoxic reaction tank 13 in an overflow mode, the sewage in the anoxic reaction tank 13 enters the aerobic reaction tank 11 through a mixed liquid self-flowing pipeline after reaction, namely, the pipeline between the anoxic reaction tank 13 and the aerobic reaction tank 11 is communicated, the bottom of the aerobic reaction tank 11 is provided with the intermediate lift pump 4, the sewage in the aerobic reaction tank 11 is lifted and controlled, so that the liquid level of the sewage is always lower than that of the anoxic reaction tank 13, one part of the mixed liquid lifted by the intermediate lift pump 4 reenters the anoxic reaction tank 13 through the mixed liquid backflow pipeline 12, and the other part of the mixed liquid enters the vertical flow type mud-water separation and precipitation unit 8 through the mixed liquid pressure output pipeline 11. The water at the upper part of the vertical flow type mud-water separation and precipitation unit 8 is discharged through a water outlet pipeline 7, one part of sludge at the bottom of the vertical flow type mud-water separation and precipitation unit enters a sludge treatment terminal 5 through a sludge treatment pipeline 6, and the other part of sludge enters the anaerobic reaction tank 2 again through a sludge return pipeline 3;
the liquid level control in the whole operation process of the equipment is realized by the intermediate lift pump 4, the ball float valve 14 at the tail end of the mixed liquid return pipeline 12 and the tail end of the sludge return pipeline 3, the one-way valve 9 on the mixed liquid pressure output pipeline 11 and the throttle valve on the sludge treatment pipeline 6.
The utility model provides an upflow biological nitrogen and phosphorus removal sewage treatment concrete method steps as follows:
1. the sewage flows through the anaerobic reaction tank and the aerobic reaction tank 11 from front to back in sequence by gravity. After aerobic biological reaction, the water phase of the mixed solution is rich in nitrate nitrogen substances, and the mud phase is rich in phosphate radical substances.
2. The mixed liquor after aerobic biological reaction is pressure-conveyed through the middle lift pump 4, part of the mixed liquor is conveyed to the anoxic reaction tank 13 in an internal reflux mode through pressure, the mixed liquor rich in nitrate nitrogen substances is subjected to denitrification reaction in the anoxic reaction tank 13, and the mixed liquor is converted into nitrogen to be dissipated into the air, so that the aim of denitrification is fulfilled.
3. The other part of the mixed liquid after pressure conveying enters a rear end vertical type mud-water separation and precipitation unit 8, and the liquid level is obviously higher than that of the anaerobic reaction tank 2 and the related treatment units.
4. After the vertical mud-water separation and precipitation unit 8 carries out mud-water precipitation separation, most of the sludge subjected to lower precipitation compression flows into the anaerobic reaction tank 2 through the inverted siphon closed flow channel in a gravity flow manner under the action of liquid level pressure difference, namely static pressure, of the anaerobic reaction tank 2, so as to provide reaction microorganisms for the first-step phosphorus release reaction of biological phosphorus removal; the other small part of the sludge is discharged in the form of residual sludge and flows to the sludge treatment terminal 5 through the inverted siphon closed flow channel by gravity for treatment, namely, the phosphorus-rich sludge is discharged from the water treatment system, and finally the purpose of separating and removing phosphorus-containing pollutants from the sewage is achieved.
5. The supernatant effluent after being treated by the vertical mud-water separation and precipitation unit 8 can flow to an advanced treatment unit or a user using secondary treated effluent as reclaimed water by gravity under the condition of higher liquid level, namely a secondary lifting power unit or a reclaimed water recycling and conveying power unit is not designed and arranged, or the supernatant effluent flows to be discharged to an environmental water body by gravity.
6. When the internal and external reflux operation is carried out, each control valve is manually adjusted to totally distribute the proportion of the internal and external reflux and the water yield of the vertical mud-water separation and precipitation unit 8, and the internal and external reflux or one of the internal and external reflux can be completely stopped; then, when the water inlet amount is larger, the internal and external reflux amount is automatically reduced; when the water inflow is small, the internal and external reflux quantities are automatically increased, and the automatic matching of the water inflow and the internal and external reflux quantities is realized.
7. The throttle valve on the sludge treatment pipeline 6 adjusts the discharge amount of the residual sludge, and the purposes of adjusting and controlling the processes of sludge age, sludge settling performance and the like are achieved. The one-way valve 9 is arranged to prevent mixed liquid from flowing backwards to cause the accidents of oxygen deficiency and water overflow of the aerobic reaction tank 11 when the middle lift pump 4 breaks down suddenly.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. An up-flow biological nitrogen and phosphorus removal sewage treatment device comprises an anaerobic-anoxic reaction tank, wherein a sewage inlet pipeline is arranged on the side edge of the anaerobic-anoxic reaction tank; the anaerobic reaction tank is connected with the aerobic reaction tank through a mixed liquid gravity flow pipeline, and is characterized in that: an intermediate lifting pump is arranged in the aerobic reaction tank, and an output end of the intermediate lifting pump is connected with a mixed liquid reflux pipeline and a mixed liquid pressure output pipeline in parallel; the output end of the mixed liquid backflow pipeline is positioned above the anaerobic reaction tank, and the mixed liquid pressure output pipeline is connected with the vertical-flow type mud-water separation and precipitation unit;
the side wall of the upper part of the vertical type mud-water separation and precipitation unit is provided with a water outlet pipeline, and the bottom of the vertical type mud-water separation and precipitation unit is connected with a sludge treatment pipeline and a sludge return pipeline in parallel; the sludge treatment pipeline is connected with the sludge treatment terminal, and the tail end of the sludge return pipeline is positioned at the upper part of the anaerobic reaction tank.
2. The upflow biological nitrogen and phosphorus removal sewage treatment plant as recited in claim 1, wherein the anaerobic/anoxic reaction tank is divided into an anaerobic reaction tank and an anoxic reaction tank by a partition.
3. The upflow biological nitrogen and phosphorus removal sewage treatment plant as recited in claim 1, wherein during operation, the water level of the vertical slurry-water separation and precipitation unit is higher than the water level of the anaerobic reaction tank, the water level of the anaerobic reaction tank is higher than the water level of the anoxic reaction tank, and the water level of the anoxic reaction tank is higher than the water level of the aerobic reaction tank.
4. The upflow biological nitrogen and phosphorus removal sewage treatment plant as recited in claim 1, wherein the mixed liquor return conduit end and the sludge return conduit end are respectively provided with a ball float valve; the mixed liquid pressure output pipeline is provided with a one-way valve; the sludge treatment pipeline is provided with a throttle valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111675441A (en) * | 2020-06-27 | 2020-09-18 | 济宁中山公用水务有限公司 | Upflow biological nitrogen and phosphorus removal sewage treatment method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111675441A (en) * | 2020-06-27 | 2020-09-18 | 济宁中山公用水务有限公司 | Upflow biological nitrogen and phosphorus removal sewage treatment method and device |
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