CN212640238U - Sewage treatment device - Google Patents
Sewage treatment device Download PDFInfo
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- CN212640238U CN212640238U CN202021806657.4U CN202021806657U CN212640238U CN 212640238 U CN212640238 U CN 212640238U CN 202021806657 U CN202021806657 U CN 202021806657U CN 212640238 U CN212640238 U CN 212640238U
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Abstract
The utility model discloses a sewage treatment device, which comprises a pre-reaction tank, wherein the pre-reaction tank is used for introducing external sewage and carrying out anaerobic oxidation to obtain pretreated sewage; the main reaction tank comprises a denitrification tank and a biochemical sedimentation tank, the denitrification tank is provided with a liquid inlet and a liquid outlet which are arranged at intervals, and the pre-reaction tank is communicated with the liquid inlet and is used for guiding the pretreated sewage into the denitrification tank for denitrification reaction to obtain the denitrification sewage; the liquid outlet is communicated with the biochemical sedimentation tank and is used for guiding the denitrification sewage into the biochemical sedimentation tank for aerobic biochemical reaction and sedimentation. Namely, the technical scheme of the utility model under the prerequisite that does not increase area, ensured that the total nitrogen content of play water reaches the emission standard that is less than 15 mg/L.
Description
Technical Field
The utility model relates to a sewage treatment technical field, in particular to sewage treatment device.
Background
In the present stage, the development of social economy, science and technology and culture enables people to change their production and living modes greatly, the types and the quantity of pollutants in urban sewage are increased rapidly, and in addition, the deepening of people on the concept of environmental protection promotes the upgrading and reconstruction of sewage treatment plants, so that the realization of better sewage treatment effect becomes the key point of wide social attention. In order to meet stricter emission standards, the sewage treatment plant in China cities and towns is carrying out a new round of upgrading and reconstruction.
However, the organic matter components of the sewage are very complex, especially the content of pollutants such as ammonia nitrogen, total nitrogen and the like is very high, and in order to reach higher discharge standard, the conventional modification method adds an advanced treatment unit such as an aeration biological filter, a denitrification deep bed filter and the like at the tail end of a CASS (Cyclic activated sludge System) tank so as to further reduce the total nitrogen content of the effluent. However, the addition of the advanced processing units will certainly increase the floor space.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a sewage treatment device, aiming at ensuring that the total nitrogen content of effluent reaches the discharge standard less than 15mg/L on the premise of not increasing the occupied area.
In order to achieve the above object, the utility model provides a sewage treatment device, include:
the pre-reaction tank is used for introducing external sewage and carrying out anaerobic oxidation to obtain pretreated sewage;
the main reaction tank comprises a denitrification tank and a biochemical sedimentation tank, the denitrification tank is provided with a water inlet and a water outlet which are arranged at intervals, and the pre-reaction tank is communicated with the water inlet and is used for guiding the pretreated sewage into the denitrification tank for denitrification reaction so as to obtain the denitrification sewage; the water outlet is communicated with the biochemical sedimentation tank and is used for guiding the denitrification sewage into the biochemical sedimentation tank for aerobic biochemical reaction and sedimentation.
Optionally, the biochemical sedimentation tank includes an aerobic tank and a circulation clarifier, the water outlet is communicated with the aerobic tank for guiding the denitrification sewage into the aerobic tank for aerobic biochemical reaction, the circulation clarifier is installed in the aerobic tank, the circulation clarifier has an inflow port and an outflow port which are arranged at intervals, the inflow port is communicated with the aerobic tank for guiding the sewage in the aerobic tank into the circulation clarifier for sedimentation, and the outflow port is communicated with the outside for discharging supernatant after sedimentation by the circulation clarifier.
Optionally, the circulation clarifier includes a housing and a water outlet channel, a liquid storage chamber is formed in the housing, the housing is provided with the inflow port, the inflow port is communicated with the liquid storage chamber and is used for introducing sewage of the aerobic tank into the liquid storage chamber;
the water outlet channel penetrates through the shell, a fluid inlet is formed in one end, extending into the shell, of the water outlet channel and is arranged above the bottom wall of the liquid storage cavity, and the water outlet channel is located at one end, outside the shell, of the water outlet channel and is used for discharging supernatant after precipitation.
Optionally, the side wall of the upper portion of the casing is provided with the inflow port, the circulation clarifier further includes a surrounding plate, a first diaphragm, a second diaphragm and a third diaphragm, the surrounding plate is protruded from the top wall of the liquid storage chamber, is arranged around the liquid storage chamber in the circumferential direction, and is spaced from the side wall of the liquid storage chamber, and a settling space is formed inside the surrounding plate;
the first diaphragm plate, the second diaphragm plate and the third diaphragm plate are sequentially arranged in the settling space at intervals along the height direction of the shell, and divide the settling space into a first settling chamber at the bottom, a clear liquid chamber at the top and a second settling chamber between the first settling chamber and the clear liquid chamber, the second settling chamber is communicated with the first settling chamber and the clear liquid chamber, and the first settling chamber is communicated with the inner space of the shell;
the liquid outlet channel sequentially penetrates through the first transverse clapboard, the second transverse clapboard and the third transverse clapboard, is communicated with the clear liquid chamber and is used for leading out the supernatant liquid from the clear liquid chamber.
Optionally, a plurality of inclined plates are installed in the first settling chamber, and the inclined plates are arranged in an inclined manner along the height direction of the shell.
Optionally, the casing includes barrel and cone, barrel locates on the cone, barrel has seted up the inflow entrance, the water outlet passageway wears to locate barrel, just fluid inlet locates the top of cone, barrel with cone intercommunication, in order to form the stock solution cavity, cone is the reduction trend setting from top to bottom, cone's bottom is equipped with the mud backward flow mouth, the mud backward flow mouth communicate in the stock solution cavity with good oxygen pond for will flow in the mud mixed liquid of stock solution cavity is discharged good oxygen pond.
Optionally, an air blocking member is arranged at the dirt return port, a gap is formed between the air blocking member and the dirt return port, and a projection of the dirt return port on the horizontal plane is located in an area where the projection of the air blocking member on the horizontal plane is located.
Optionally, the cross-sectional area of the air blocking member is gradually increased from top to bottom.
Optionally, the denitrification tank is further provided with a nitrifying liquid return port, and the nitrifying liquid return port is communicated with the aerobic tank so that nitrifying liquid in the aerobic tank flows back to the denitrification tank.
Optionally, the biochemical sedimentation tank includes a plurality of circulation clarifiers, an inflow port of each circulation clarifier is communicated with the aerobic tank, the aerobic tank is provided with a drain pipe, an outflow port of each circulation clarifier is communicated with the drain pipe, and an end of the drain pipe away from the circulation clarifier is arranged outside the aerobic tank.
The technical scheme of the utility model, the embodiment of the utility model provides a main reaction tank includes denitrification tank and biochemical sedimentation tank, the preliminary reaction tank communicates in the water inlet in denitrification tank, so that the leading-in denitrification reaction that carries out of pretreatment sewage that anaerobic oxidation obtained, denitrifying bacteria in the denitrification tank turns into nitrogen gas with the organic matter in the pretreatment sewage as the carbon source and through denitrification reaction with nitrate nitrogen wherein, obtain denitrification sewage, and like this, denitrification sewage is leading-in to biochemical sedimentation tank, denitrification sewage is through good oxygen biochemical reaction and precipitation in biochemical sedimentation tank, and like this, the total nitrogen content of play water has been reduced. And, the utility model provides a main reaction tank is located to the denitrification pond, is not additionally add on the basis in CASS pond to this has avoided area's increase. Namely, the technical proposal of the utility model can lead the total nitrogen content of the effluent to reach the discharge standard less than 15mg/L on the premise of not additionally increasing the occupied area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a front view of a sewage treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of the wastewater treatment plant of FIG. 1;
FIG. 3 is a side view of the main reaction cell of FIG. 1;
FIG. 4 is a front view of the annular flow clarifier of FIG. 1;
the reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 100 | |
531 | |
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| 10 | |
531a | |
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| 10a | |
5311 | |
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| 30 | |
5313 | Taper |
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| 31 | |
533 | |
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| 40 | |
534 | |
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| 41 | |
534a | |
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| 50 | |
535 | |
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| 51 | |
535a | |
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| 51a | |
536 | |
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| | Return canal | 536a | |
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| | Water inlet | 537 | |
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| | Water outlet | 537a | Clear |
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| 511 | |
60 | |
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| 52 | |
70 | |
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| 53 | |
80 | |
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| | Inlet port | 91 | |
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| | Outflow opening | 92 | |
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| 53c | Sludge return port |
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The utility model provides a sewage treatment device, which aims to reduce the nitrogen content of sewage on the premise of not increasing the occupied area.
Referring to fig. 1 to 4, in an embodiment of the present invention, a sewage treatment apparatus includes:
the pre-reaction tank 10 is used for introducing external sewage and carrying out anaerobic oxidation to obtain pretreated sewage;
the main reaction tank 30 comprises a denitrification tank 40 and a biochemical sedimentation tank 50, the denitrification tank 40 is provided with a water inlet and a water outlet which are arranged at intervals, and the pre-reaction tank 10 is communicated with the liquid inlet and is used for guiding the pre-treated sewage into the denitrification tank 40 for denitrification reaction to obtain the denitrification sewage; the water outlet is communicated with the biochemical sedimentation tank 50 and is used for guiding the denitrification sewage into the biochemical sedimentation tank 50 for aerobic biochemical reaction and sedimentation.
The technical scheme of the utility model, the embodiment of the utility model provides a main reaction tank 30 includes denitrification tank 40 and biochemical sedimentation tank 50, the water inlet in denitrification tank 40 is linked together in the preliminary reaction tank 10, so that the leading-in denitrification reaction that carries out in denitrification tank 40 of preliminary treatment sewage that anaerobic oxidation obtained, the denitrifying bacteria in denitrification tank 40 regards as the carbon source with the organic matter in the preliminary treatment sewage and turns into nitrogen gas through denitrification reaction with nitrate nitrogen wherein, obtain denitrification sewage, and like this, denitrification sewage leads to biochemical sedimentation tank 50, denitrification sewage is through aerobic reaction and precipitation at biochemical sedimentation tank 50, so, the total nitrogen content of effluent has been reduced. And, the utility model provides a main reaction tank 30 is located to denitrification pond 40, does not additionally add on the basis of CASS reactor to this has avoided area's increase. Namely, the technical proposal of the utility model can lead the total nitrogen content of the effluent to reach the discharge standard less than 15mg/L on the premise of not additionally increasing the occupied area.
It should be noted that, the utility model discloses can be through setting up baffle 31 in main reaction tank 30 to this separates main reaction tank 30 through baffle 31 and forms denitrification pond 40 and biochemical sedimentation tank 50. The embodiment of the utility model provides a carry out anaerobic oxidation in the preliminary reaction pond 10, in order to realize going on of anaerobic oxidation process, the embodiment of the utility model provides an inoculate the mud bacterial earlier, wherein, include among the mud bacterial denitrification fungus and phosphorus-accumulating fungus etc. denitrification fungus, denitrification fungus carries out the denitrification process in preliminary reaction pond 10, turns into nitrogen gas with the nitrate nitrogen in the sewage to tentatively reduce total nitrogen content in the sewage, obtained preliminary treatment sewage; then leading the pretreated sewage containing the inoculated sludge strains into a denitrification tank 40, and further converting nitrate nitrogen in the pretreated sewage into nitrogen through denitrification reaction by using undecomposed organic matters in the denitrification tank as a carbon source under the anoxic condition so as to further reduce the total nitrogen content in the sewage and obtain the denitrification sewage; then, the denitrification sewage containing inoculated sludge strains is led into a biochemical sedimentation tank 50, easily degradable organic matters in the sewage are degraded under aerobic conditions, meanwhile, phosphorus-accumulating bacteria absorb phosphorus in the denitrification sewage, and the phosphorus enters phosphorus-accumulating microorganisms, so that the content of the phosphorus in the sewage is reduced, and thus, after sedimentation, the biochemical oxygen demand, the total nitrogen content and the total phosphorus content of the effluent are reduced.
Referring to fig. 1 to 4, in an embodiment of the present invention, the biochemical sedimentation tank 50 includes an aerobic tank 51 and a circulation clarifier 53, the liquid outlet is communicated with the aerobic tank 51 and is used for guiding the denitrification sewage into the aerobic tank 51 for aerobic oxidation, the circulation clarifier 53 is installed in the aerobic tank 51, the circulation clarifier 53 has an inflow port 53a and an outflow port 53b which are arranged at intervals, the inflow port 53a is communicated with the aerobic tank 51 and is used for guiding the sewage in the aerobic tank 51 into the circulation clarifier 53 for sedimentation, and the outflow port 53b is used for being communicated with the outside to discharge supernatant after sedimentation by the circulation clarifier 53. Certainly, in order to ensure the dissolved oxygen of the aerobic tank 51, the embodiment of the present invention may be provided with an aeration disc 80 at the bottom of the aerobic tank 51, so as to ensure the sufficient oxidation of the denitrification sewage through the arrangement of the aeration disc 80. The embodiment of the utility model provides a through set up circulation clarifier 53 in good oxygen pond 51 to this makes the sewage after good oxygen oxidation of good oxygen pond 51 flow into circulation clarifier 53, and circulation clarifier 53 separates out the rich phosphorus mud that the phosphorus accumulating fungus formed, with this total phosphorus content in the sewage that has reduced.
Referring to fig. 1 to 4, in an embodiment of the present invention, the circulation clarifier 53 includes a housing 531 and a water outlet channel 533, a liquid storage chamber 531a is formed in the housing 531, the housing 531 is provided with the inflow port 53a, and the inflow port 53a is communicated with the liquid storage chamber 531a and is used for introducing the sewage of the aerobic tank 51 into the liquid storage chamber 531 a; the water outlet channel 533 penetrates through the casing 531, a fluid inlet is formed in one end, extending into the casing 531, of the water outlet channel 533, and is arranged above the bottom wall of the liquid storage chamber 531a, and the outflow port 53b is formed in one end, located outside the casing 531, of the water outlet channel 533 and used for discharging supernatant liquid after precipitation. The embodiment of the utility model provides a through setting up the exhalant canal 533 with stock solution cavity 531a intercommunication to this makes the sewage in the aerobic tank flow to exhalant canal 533 through stock solution cavity 531a by inflow entrance 53a, and exhalant canal 533 purifies the sewage in the aerobic tank that flows in, makes the play water after the separation discharge from egress opening 53b, has reached the effect of purifying sewage.
Referring to fig. 1 to 4, in an embodiment of the present invention, the inflow port 53a is opened on an upper side wall of the casing 531, the circulation clarifier 53 further includes a surrounding plate 534, a first diaphragm 535, a second diaphragm 536 and a third diaphragm 537, the surrounding plate 534 is convexly disposed on a top wall of the liquid storage chamber 531a, and is circumferentially disposed along a circumferential direction of the liquid storage chamber 531a and spaced from a side wall of the liquid storage chamber 531a, and a settling space 534a is formed inside the surrounding plate 534; the first diaphragm 535, the second diaphragm 536 and the third diaphragm 537 are sequentially disposed in the settling space 534a at intervals along the height direction of the housing 531, and divide the settling space 534a into a first settling chamber 535a at the bottom, a clear liquid chamber 537a at the top, and a second settling chamber 536a located between the first settling chamber 535a and the clear liquid chamber 537a, the second settling chamber 536a communicates the first settling chamber 535a and the clear liquid chamber 537a, and the first settling chamber 535a communicates the inner space of the housing 531; the liquid outlet channel 533 is sequentially disposed through the first diaphragm 535, the second diaphragm 536, and the third diaphragm 537, and is communicated with the clear liquid chamber 537a, for leading out a supernatant from the clear liquid chamber 537 a. It should be noted that, in the embodiment of the present invention, the sewage in the aerobic tank flows through the second settling chamber 536a and the clear liquid chamber 537a from the first settling chamber 535a below, and in the flowing process of the sewage in the aerobic tank, the sludge mixed liquid is settled under the action of gravity, so as to achieve the effect of solid-liquid separation, and thus, the supernatant flowing out from the clear liquid chamber 537a does not contain sludge, and the phosphorus-rich sludge is prevented from being discharged from the outflow port 53b, so that the total phosphorus content of the effluent is reduced.
Referring to fig. 1 to 4, a plurality of inclined plates 60 are installed in the first settling chamber 535a, and the plurality of inclined plates 60 are inclined in the height direction of the housing 531. The embodiment of the utility model provides a through the setting of swash plate 60, because the density of mud is greater than the density of supernatant, like this, mud moves towards fluid inlet along swash plate 60 under the action of gravity, and the supernatant moves towards egress opening 53b along swash plate 60 under the action of gravity to this makes and does not contain mud in the supernatant that flows from egress opening 53b, thereby has reduced the total phosphorus content of play water, has reached the effect to sewage purification.
Referring to fig. 1 to 4, in an embodiment of the present invention, the housing 531 includes a cylindrical portion 5311 and a conical portion 5313, the cylindrical portion 5311 is disposed on the conical portion 5313, the cylindrical portion 5311 has the inflow port 53a, the water outlet channel 533 is disposed through the cylindrical portion 5311, the fluid inlet is disposed above the conical portion 5313, the cylindrical portion 5311 is communicated with the conical portion 5313 to form the liquid storage chamber 531a, the conical portion 5313 is disposed in a decreasing trend from top to bottom, the bottom of the conical portion 5313 is provided with a dirt return port 53c, and the dirt return port 53c is communicated with the liquid storage chamber 531a and the aerobic tank 51 for discharging the sludge mixed liquid flowing into the liquid storage chamber 531a into the aerobic tank 51. The embodiment of the utility model provides a barrel portion 5311 is located to inflow port 53a, so, the mud mixed liquid that flows into stock solution cavity 531a from the inflow port 53a of top is deposit downwards under the action of gravity, at the in-process that flows, mud subsides in cone portion 5313, barrel portion 5311 is arranged in to the supernatant, thereby reached the effect to the preliminary purification of effluent, and thus, the supernatant rethread effluent passageway 533 overflow of top is discharged, further purification to sewage has been realized with this, the mud of below flows back to aerobic tank 51, aerobic tank 51 is interior to carry out aerobic oxidation again, thereby further reduce the organic matter in the mud mixed liquid, and absorb phosphorus wherein through gathering the phosphorus bacteria, further reduce the total phosphorus content in the sewage.
Referring to fig. 1 to 4, in an embodiment of the present invention, an air blocking member 70 is disposed at the dirt return opening 53c, a gap is disposed between the air blocking member 70 and the dirt return opening 53c, and a projection of the sludge return opening 53c on a horizontal plane is located in a region where the projection of the air blocking member 70 on the horizontal plane is located. It should be noted that the gas blocking member 70 may have various shapes, and the cross section thereof may be a diamond shape, a trapezoid shape, a triangle shape, etc., and the embodiment of the present invention is not limited thereto, and the above is all within the protection scope of the embodiment of the present invention. The embodiment of the utility model provides a through the setting of keeping off air spare 70 to this has blockked that the air enters into stock solution cavity 531a through mud backward flow mouth 53c in the good oxygen pond 51, thereby has avoided the mixed liquid of mud in the stock solution cavity 531a to overflowing to liquid outlet channel 533 by the gas influence, has guaranteed the normal clear of solid-liquid separation process, has reached the effect to going out water purification.
Referring to fig. 1 to 4, in an embodiment of the present invention, the cross-sectional area of the air blocking member 70 is gradually increased from top to bottom. It should be noted that, in the embodiment of the present invention, by providing the air blocking member 70 with the cross-sectional area gradually increasing from top to bottom, on one hand, the air blocking member 70 is ensured to block the gas in the aerobic tank 51, and the gas in the aerobic tank 51 is prevented from entering the liquid storage chamber 531 a; on the other hand, the sludge mixed liquor deposited in the liquid storage chamber 531a can move towards the aerobic tank 51 along the outer wall of the air blocking member 70, so that the sludge mixed liquor in the liquid storage chamber 531a is ensured to smoothly flow back to the aerobic tank 51.
Referring to fig. 1 to 4, in an embodiment of the present invention, the denitrification tank 40 is further provided with a nitrifying liquid return port, and the nitrifying liquid return port is communicated with the aerobic tank 51, so that the sludge mixed liquid in the aerobic tank 51 flows back to the denitrification tank 40. In the aerobic tank 51, easily degradable organic matters in the denitrification sewage are converted into nitrate nitrogen through metabolism activities of aerobic microorganisms, meanwhile, the organic matters in the denitrification sewage are oxidized and decomposed to supply energy to the phosphorus accumulating bacteria, the phosphorus accumulating bacteria absorb a large amount of phosphorus from the phosphorus accumulating bacteria, the phosphorus is enriched in the phosphorus accumulating bacteria, so as to form sludge mixed liquor in the aerobic tank, thus, the sludge mixed liquor formed by the enrichment of the phosphorus-accumulating bacteria is deposited in the aerobic tank 51, the aerobic tank 51 is communicated with the return port of the denitrification tank 40, thus, the sludge mixed liquid containing a certain amount of oxygen and a large amount of nitrate nitrogen in the aerobic tank 51 flows back to the denitrification tank 40, the part of the sludge mixed liquid is mixed with the sewage flowing in the pre-reaction tank 10 to form an anoxic environment, in an anoxic environment, the denitrifying bacteria denitrify and convert nitrate nitrogen in the denitrifying tank 40 into nitrogen gas, thereby reducing the total nitrogen content of the effluent. Supplementary note, be equipped with return canal 51b in the good oxygen pond 51, return canal 51b adopts steel concrete or stainless steel material, and apopore 51d has been seted up to return canal 51b, and the sewage in the good oxygen pond 51 flows into return canal 51b through apopore 51d, and return canal 51b is close to denitrification pond 40 and installs first reflux pump 511, and with the water inlet intercommunication 51b of first reflux pump 511, with the delivery port intercommunication denitrification pond 40 of first reflux pump 511, the embodiment of the utility model provides a through the setting of first reflux pump 511, so that the mud mixed liquid that flows into return canal 51b can flow to denitrification pond 40 smoothly, so, makes denitrification pond 40 further carry out the denitrification process to the nitrate nitrogen in the mud mixed liquid that flows into denitrification pond 40 to the total nitrogen content of effluent has been reduced. Meanwhile, the water distribution channel 51a is arranged opposite to the return channel 51b, the water distribution channel 51a is made of steel concrete or stainless steel, the water distribution channel 51a is provided with a water distribution hole 51c, and the denitrification sewage flowing into the water distribution channel 51a flows to the aerobic tank 51 through the water distribution hole 51c, so that the denitrification sewage is further oxidized aerobically by the aerobic tank 51, and the organic matter content of the sewage is reduced.
Referring to fig. 1 to 4, in an embodiment of the present invention, the biochemical sedimentation tank 50 includes a plurality of circulation clarifiers 53, an inflow port 53a of each circulation clarifier 53 is connected to the aerobic tank 51, the aerobic tank 51 is installed with a drain pipe 52, an outflow port 53b of each circulation clarifier 53 is connected to the drain pipe 52, and an end of the drain pipe 52 away from the circulation clarifier 53 is disposed outside the aerobic tank 51. The embodiment of the utility model provides a through set up a plurality of circulation clarifiers 53 in good oxygen pond 51, sewage in the good oxygen pond 51 flows into a plurality of circulation clarifiers 53 respectively, and a plurality of circulation clarifiers 53 purify the sewage in the good oxygen pond simultaneously to discharge through fluid-discharge tube 52, with this treatment effeciency that has improved sewage.
Referring to fig. 1 to 4, in an embodiment of the present invention, a first stirrer 91 is installed in the pre-reaction tank 10, and the first stirrer 91 is used for stirring introduced sewage, so that the sewage is fully mixed with inoculated sludge strains, thereby ensuring that the anaerobic oxidation process is fully performed. The embodiment of the utility model provides a can also set up a plurality of first agitators 91 according to actual need to adjust first agitator 91's rotational speed, the embodiment of the utility model provides a not limited to here, all above the utility model discloses a within the protection scope.
Referring to fig. 1 to 4, in an embodiment of the present invention, a second stirrer 92 is installed in the denitrification tank 40, and the second stirrer 92 is used for stirring the introduced pretreated sewage, so that the pretreated sewage is fully mixed with the inoculated sludge strains, thereby ensuring that the anoxic oxidation process is fully performed. The embodiment of the utility model provides a can also set up a plurality of second agitators 92 according to actual need to adjust second agitator 92's rotational speed, the embodiment of the utility model provides a not limited to here, all above the utility model discloses a within the protection scope.
Referring to fig. 1 to 4, in an embodiment of the present invention, a second reflux pump 41 is disposed between the denitrification tank 40 and the anaerobic tank 10, a water inlet of the second reflux pump 41 is communicated with the denitrification tank 40, and a water outlet of the second reflux pump 41 is communicated with the anaerobic tank 10, so as to introduce the sludge-water mixed liquid in the denitrification tank 40 into the anaerobic tank 10. It should be noted that, the embodiment of the present invention provides a through the setting of the second reflux pump 41, so that the muddy water mixed liquid in the denitrification tank 40 can flow back to the anaerobic tank 10, and the muddy water mixed liquid in the denitrification tank 40 is further oxidized by anaerobic oxidation in the anaerobic tank 10, thereby improving the treatment effect on the sewage.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.
Claims (10)
1. A sewage treatment apparatus, comprising:
the pre-reaction tank is used for introducing external sewage and carrying out anaerobic oxidation to obtain pretreated sewage;
the main reaction tank comprises a denitrification tank and a biochemical sedimentation tank, the denitrification tank is provided with a water inlet and a water outlet which are arranged at intervals, and the pre-reaction tank is communicated with the water inlet and is used for guiding the pretreated sewage into the denitrification tank for denitrification reaction so as to obtain the denitrification sewage; the water outlet is communicated with the biochemical sedimentation tank and is used for guiding the denitrification sewage into the biochemical sedimentation tank for aerobic biochemical reaction and sedimentation.
2. The wastewater treatment apparatus according to claim 1, wherein the biochemical sedimentation tank comprises an aerobic tank and a circulation clarifier, the water outlet is communicated with the aerobic tank and is used for introducing the denitrification wastewater into the aerobic tank for aerobic biochemical reaction, the circulation clarifier is installed in the aerobic tank and is provided with an inflow port and an outflow port which are arranged at intervals, the inflow port is communicated with the aerobic tank and is used for introducing the wastewater in the aerobic tank into the circulation clarifier for sedimentation, and the outflow port is used for being communicated with the outside so as to discharge supernatant liquid after sedimentation by the circulation clarifier.
3. The sewage treatment device according to claim 2, wherein the circulation clarifier comprises a housing and a water outlet channel, a liquid storage chamber is formed in the housing, the housing is provided with the inflow port, the inflow port is communicated with the liquid storage chamber and is used for introducing sewage of the aerobic tank into the liquid storage chamber;
the water outlet channel penetrates through the shell, a fluid inlet is formed in one end, extending into the shell, of the water outlet channel and is arranged above the bottom wall of the liquid storage cavity, and the water outlet channel is located at one end, outside the shell, of the water outlet channel and is used for discharging supernatant after precipitation.
4. The sewage treatment device according to claim 3, wherein the upper side wall of the housing is provided with the inflow port, the loop clarifier further comprises a surrounding plate, a first transverse partition plate, a second transverse partition plate and a third transverse partition plate, the surrounding plate is convexly arranged on the top wall of the liquid storage chamber, is arranged around the liquid storage chamber in the circumferential direction and is spaced from the side wall of the liquid storage chamber, and a settling space is formed inside the surrounding plate;
the first diaphragm plate, the second diaphragm plate and the third diaphragm plate are sequentially arranged in the settling space at intervals along the height direction of the shell, and divide the settling space into a first settling chamber at the bottom, a clear liquid chamber at the top and a second settling chamber between the first settling chamber and the clear liquid chamber, the second settling chamber is communicated with the first settling chamber and the clear liquid chamber, and the first settling chamber is communicated with the inner space of the shell;
the water outlet channel sequentially penetrates through the first transverse partition plate, the second transverse partition plate and the third transverse partition plate, is communicated with the clear liquid chamber, and is used for leading out supernatant liquid from the clear liquid chamber.
5. The sewage treatment apparatus of claim 4, wherein a plurality of inclined plates are installed in the first settling chamber, and the plurality of inclined plates are inclined in a height direction of the housing.
6. The sewage treatment device according to claim 3, wherein the housing includes a cylindrical portion and a conical portion, the cylindrical portion is disposed on the conical portion, the cylindrical portion has the inflow opening, the water outlet passage is disposed through the cylindrical portion, the fluid inlet is disposed above the conical portion, the cylindrical portion is communicated with the conical portion to form the liquid storage chamber, the conical portion is disposed in a decreasing trend from top to bottom, a sludge recirculation port is disposed at a bottom of the conical portion, and the sludge recirculation port is communicated with the liquid storage chamber and the aerobic tank for discharging the sludge mixed liquid flowing into the liquid storage chamber into the aerobic tank.
7. The sewage treatment device according to claim 6, wherein an air blocking member is arranged at the sludge return port, a gap is arranged between the air blocking member and the sludge return port, and the projection of the sludge return port on the horizontal plane is positioned in the area of the projection of the air blocking member on the horizontal plane.
8. The sewage treatment apparatus of claim 7 wherein the cross-sectional area of the air baffle member is gradually increased from top to bottom.
9. The sewage treatment device according to claim 6, wherein the denitrification tank is further provided with a nitrifying liquid return port, and the nitrifying liquid return port is communicated with the aerobic tank so that nitrifying liquid in the aerobic tank flows back to the denitrification tank.
10. The wastewater treatment apparatus according to any of claims 2 to 8, wherein the biochemical sedimentation tank comprises a plurality of loop clarifiers, the inflow port of each loop clarifier is communicated with the aerobic tank, the aerobic tank is provided with a drain pipe, the outflow port of each loop clarifier is communicated with the drain pipe, and the end of the drain pipe, which is far away from the loop clarifiers, is arranged outside the aerobic tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021806657.4U CN212640238U (en) | 2020-08-25 | 2020-08-25 | Sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021806657.4U CN212640238U (en) | 2020-08-25 | 2020-08-25 | Sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212640238U true CN212640238U (en) | 2021-03-02 |
Family
ID=74786106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202021806657.4U Active CN212640238U (en) | 2020-08-25 | 2020-08-25 | Sewage treatment device |
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