CN113968619B - Self-circulation double-AO biochemical integrated sewage treatment device and water treatment system - Google Patents
Self-circulation double-AO biochemical integrated sewage treatment device and water treatment system Download PDFInfo
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- CN113968619B CN113968619B CN202110713288.7A CN202110713288A CN113968619B CN 113968619 B CN113968619 B CN 113968619B CN 202110713288 A CN202110713288 A CN 202110713288A CN 113968619 B CN113968619 B CN 113968619B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of water treatment equipment, and provides a self-circulation double-AO biochemical integrated sewage treatment device and a water treatment system, wherein the self-circulation double-AO biochemical integrated sewage treatment device comprises: the first water collecting pipe is used for collecting water in the primary pre-anoxic zone; the second-stage pre-anoxic zone is arranged at the downstream of the first-stage pre-anoxic zone, and the other end of the first water collecting pipe enters the second-stage pre-anoxic zone; the water body accelerating device is respectively arranged in the primary pre-anoxic zone and the secondary pre-anoxic zone; the biochemical reaction zone is positioned at the downstream of the secondary pre-anoxic zone, and the sedimentation zone is positioned at the downstream of the biochemical reaction zone. The self-circulation double-AO biochemical integrated sewage processor provided by the invention is stirred by the self-kinetic energy of the water body, and the stirrers are not required to be arranged in the primary pre-anoxic zone and the secondary pre-anoxic zone, so that the power load of the whole self-circulation double-AO biochemical integrated sewage processor is reduced, and the running cost is reduced.
Description
Technical Field
The invention relates to the technical field of water treatment equipment, in particular to a self-circulation double-AO biochemical integrated sewage treatment device and a water treatment system.
Background
The integrated sewage treatment equipment is a complex with stronger sewage treatment capability by effectively integrating the unit bodies with different treatment functions. The integrated equipment is based on biochemical reaction, and integrates pretreatment in the early stage, biological treatment in the middle stage, flocculation sedimentation in the later stage, disinfection and the like, and is assisted with internal reflux, external reflux and the like.
For the integrated equipment in the related art, in order to support the normal progress of biochemical reaction during the pretreatment, a plurality of agitators are usually arranged in the primary pre-anoxic zone and the secondary pre-anoxic zone to enable denitrifying bacteria to fully mix with raw water for reaction, so as to improve the purification effect on sewage. However, the internal anoxic section of the integrated equipment adopts a stirrer for stirring and mixing, so that the power load of the integrated equipment is greatly increased, and the running cost of the integrated equipment is increased. Moreover, as the service time increases, the agitator wears and is consumed, and maintenance or replacement of the agitator increases the overall maintenance burden of the integrated apparatus.
Disclosure of Invention
Therefore, the invention aims to overcome the defects of large power load and high maintenance cost of the sewage treatment device in the related art, thereby providing the self-circulation double-AO biochemical integrated sewage treatment device and the water treatment system.
The invention provides a self-circulation double AO biochemical integrated sewage treatment device, comprising: a first-stage preposed anoxic zone, on which a reactor water inlet is arranged; one end of the first water collecting pipe is arranged in the primary pre-anoxic zone and used for collecting water in the primary pre-anoxic zone; the second-stage pre-anoxic zone is arranged at the downstream of the first-stage pre-anoxic zone, and the other end of the first water collecting pipe enters the second-stage pre-anoxic zone; the water body accelerating device is respectively arranged in the primary pre-anoxic zone and the secondary pre-anoxic zone and comprises: a nozzle adapted to be connected to a water inlet of the reactor or to the other end of the first water collecting pipe, at least a portion of an inner diameter of the nozzle being reduced in a flow direction of the water body; the throat comprises a throat water inlet and a throat water outlet, the throat water inlet mask is arranged above the spray pipe, and an acceleration water channel is formed between the spray pipe and the throat; the biochemical reaction zone is arranged at the downstream of the secondary pre-anoxic zone; the sedimentation zone is arranged at the downstream of the biochemical reaction zone, and a reactor water outlet is arranged on the sedimentation zone.
Further, one end of the first water collecting pipe is arranged above the throat pipe.
Further, a plurality of water inlets are formed in the part of the first water collecting pipe, which enters the primary pre-anoxic zone.
Further, at least a portion of the lance is tapered along the flow direction of the body of water.
Further, at least a part of the area of the throat pipe corresponding to the spray pipe is arranged in a conical shape.
Further, along the width direction of the primary pre-anoxic zone, the primary pre-anoxic zone is divided into a plurality of first chambers, and the bottoms of the first chambers are communicated; the throat pipe in the primary pre-anoxic zone is positioned in the first cavity in the middle; the first chambers positioned on two sides are communicated with the secondary pre-anoxic zone through the first water collecting pipes.
Further, along the width direction of the secondary pre-anoxic zone, the secondary pre-anoxic zone is divided into a plurality of second chambers, and the bottoms of the second chambers are communicated; the throat pipe in the secondary pre-anoxic zone is positioned in the second cavity in the middle; the part of the first water collecting pipe, which is positioned in the secondary pre-anoxic zone, is communicated with the spray pipe in the secondary pre-anoxic zone; the second chambers positioned on two sides are communicated with the biochemical reaction area through second water collecting pipes.
Further, the biochemical reaction zone comprises a primary reaction zone and a secondary reaction zone along the flow direction of the water body; the primary reaction zone comprises a primary aerobic chamber and a primary synchronous anoxic chamber which are communicated with each other; the secondary reaction zone comprises a secondary aerobic chamber and a secondary synchronous anoxic chamber which are communicated with each other; the second water collecting pipe stretches into the primary synchronous anoxic chamber, the primary aerobic chamber is communicated with the secondary synchronous anoxic chamber through a third water collecting pipe, and the secondary aerobic chamber is communicated with the downstream sedimentation zone.
Further, the first-stage aerobic chamber comprises two symmetrically arranged on two sides of the first-stage synchronous anoxic chamber, and the third water collecting pipe comprises a water inlet part connected with the first-stage aerobic chamber and a water outlet part connected with the second-stage synchronous anoxic chamber.
Further, a first guide plate is arranged on the top wall of each primary aerobic chamber; a second guide plate is arranged on the side wall of each primary aerobic chamber, which is close to the secondary reaction zone; and a water body passing area is formed between the bottom of the first guide plate and the plate surface of the second guide plate.
Further, the secondary aerobic chamber is arranged on the outer side of the secondary synchronous anoxic chamber in a surrounding mode.
Further, the bottom of the primary aerobic chamber and the bottom of the secondary aerobic chamber are respectively provided with an aeration disc; the primary aerobic chamber and the secondary aerobic chamber are respectively provided with suspended filler suitable for microorganism growth.
Further, the sedimentation area is divided into a nitrifying liquid reflux chamber, a floc sedimentation compression chamber, a floc sedimentation chamber and a filter chamber along the flowing direction of the water body; the nitrifying liquid reflux chamber is communicated with the primary pre-anoxic zone; the filtering chamber is positioned above the floc sedimentation compression chamber and the floc sedimentation chamber, and is communicated with the water outlet of the reactor.
Further, the nitrifying liquid reflux chamber is communicated with the biochemical reaction zone through an inverted V-shaped channel.
Further, the self-circulation double-AO biochemical integrated sewage treatment device further comprises a nitrifying liquid reflux device, one end of the nitrifying liquid reflux device acts in the nitrifying liquid reflux chamber, and the other end of the nitrifying liquid reflux device is connected with the spray pipe in the primary pre-anoxic zone.
Further, the sedimentation zone also comprises at least one high-density floc collecting hopper which is positioned between the nitrifying liquid reflux chamber and the floc sedimentation compression chamber; one end of the floc circulation device acts in the high-density floc collecting hopper, and the other end of the floc circulation device is connected with the spray pipe in the secondary pre-anoxic zone.
Further, the sedimentation zone further comprises a third guide plate, one end of the third guide plate is connected with the top wall of the sedimentation zone, and the other end of the third guide plate extends to the bottom of the floc sedimentation compression chamber.
Further, the self-circulation double-AO biochemical integrated sewage treatment device also comprises a separation tube group; the separation tube group is arranged above the floc sedimentation compression chamber and the floc sedimentation chamber, and comprises a plurality of guide tubes.
Further, the self-circulation double-AO biochemical integrated sewage treatment device also comprises a clear water collection device which is arranged above the separation tube group and is connected with the water outlet of the reactor.
Further, the tops of the primary pre-anoxic zone and the secondary pre-anoxic zone are arranged in a closed mode.
Further, at least one of the floc settling compression chamber, the floc settling chamber and the high-density floc collecting hopper is provided with a sludge discharge device.
The invention also provides a water treatment system, which comprises the self-circulation double-AO biochemical integrated sewage treatment device; the water inlet system is connected with the water inlet of the reactor; and the water purifying system is connected with the water outlet of the reactor.
Further, the water treatment system further comprises: and the sludge treatment system is connected with the sludge discharge device.
The technical scheme of the invention has the following advantages:
the invention provides a self-circulation double-AO biochemical integrated sewage treatment device, wherein a water body accelerating device is respectively arranged in a primary pre-anoxic zone and a secondary pre-anoxic zone, the water body accelerating device is provided with a spray pipe and a venturi, and a water inlet mask of the venturi is arranged above the spray pipe to form an accelerating water channel. After entering the spray pipe from the water inlet of the reactor, the inner diameter of the spray pipe is reduced at least partially, so that the water body can be accelerated after flowing out of the spray pipe and then passes through an acceleration water channel, and the water body is sprayed out from the top opening of the throat pipe and is dispersed to the periphery. Under the action of gravity, the water body falls down, under the action of low pressure, the water body enters an acceleration water channel through the interval between the throat pipe and the spray pipe, and the water body in the primary pre-anoxic zone is stirred in a hydraulic circulation mode. One end of the first water collecting pipe is communicated with the primary pre-anoxic zone, the other end of the first water collecting pipe is communicated with the spray pipe in the secondary pre-anoxic zone, the spray pipe arranged in the secondary pre-anoxic zone and the venturi are used for stirring water in the secondary pre-anoxic zone in the same hydraulic circulation mode, and the stirred water can flow into the downstream biochemical reaction zone and the sedimentation zone for subsequent purification. In the whole process, the stirring is carried out by depending on the kinetic energy of the water body, the stirrer is not required to be arranged in the primary pre-anoxic zone and the secondary pre-anoxic zone, the power load of the whole self-circulation double-AO biochemical integrated sewage processor is reduced, the running cost is reduced, and meanwhile, the stirrer is not required to be maintained or replaced, so that the integral maintenance burden of the self-circulation double-AO biochemical integrated sewage processor is reduced.
The self-circulation double-AO biochemical integrated sewage treatment device provided by the invention is provided with the nitrifying liquid reflux device, and nitrifying liquid in the nitrifying liquid reflux chamber is conveyed to the primary pre-anoxic zone, and the nitrifying liquid is mixed with raw water to reduce the pollutant concentration of the raw water due to lower pollutant concentration after being treated, so that the subsequent biochemical treatment is facilitated. And the nitrifying liquid can utilize the organic carbon source of the raw water to carry out denitrification reaction, so that the total nitrogen in the raw water is reduced.
The self-circulation double-AO biochemical integrated sewage treatment device provided by the invention has the advantages that the biochemical reaction zone comprises a primary reaction zone and a secondary reaction zone, and in the primary reaction zone and the secondary reaction zone, water body alternately flows in the synchronous anoxic zone and the aerobic zone, so that the water outlet effect is improved; in addition, the air stripping principle drives the water body to flow and disturb, so that the power consumption is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a self-circulating dual AO biochemical integrated wastewater treatment device provided in one embodiment of the present invention;
FIG. 2 is a top view of a self-circulating dual AO biochemical integrated wastewater treatment device provided in one embodiment of the present invention;
fig. 3 is a cross-sectional view taken along A-A in fig. 1.
Reference numerals illustrate:
1-a primary pre-anoxic zone; 2-second-stage pre-anoxic zone; 3-first stage reaction zone;
a 4-secondary reaction zone; 5-nitrifying liquid reflux chamber; 6-floc settling compression chamber;
7-a floc precipitation chamber; 8-filtering chamber; 9-separating the tube group;
10-a clear water collecting device; 11-a high-density floc collection hopper; 12-nitrifying liquid reflux device;
13-a floc circulation device; 14-inverted V-shaped channel; 15-an aeration disc;
16-suspending filler; 17-a first baffle; 18-a second deflector;
19-a third deflector; 20-a mud discharging device; 21-a first chamber;
22-a second chamber; 23-a primary aerobic chamber; 24-a primary synchronous anoxic chamber;
25-a secondary aerobic chamber; 26-a secondary synchronous anoxic chamber; 27-a first water collection pipe;
28-a second water collection pipe; 29-a third water collecting pipe.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a front view of a self-circulation double AO biochemical integrated sewage treatment device provided in an embodiment of the present invention, as shown in fig. 1, this embodiment provides a self-circulation double AO biochemical integrated sewage treatment device, which is a tank body with a rectangular cross-section along an axial direction of the self-circulation double AO biochemical integrated sewage treatment device, that is, a left-to-right direction in fig. 1, a reactor water inlet is provided on one side of the tank body, a reactor water outlet is provided on the other side of the tank body, a water body to be purified enters the tank body through the reactor water inlet, and the purified water body flows out from the water outlet of the reactor. Wherein, inside the tank body, along the flow direction of the water body, a first-stage pre-anoxic zone 1, a second-stage pre-anoxic zone 2, a biochemical reaction zone and a sedimentation zone are sequentially arranged.
The water inlet is suitable for being filled with water to be purified and the medicament, the medicament can be filled into the water through an independent medicament tube, and the medicament can be directly filled into the water through the water inlet after being mixed with the water. For example, the added agent may be a polymeric alumina, a polyacrylamide, a polymeric ferric sulfate, or the like.
For the primary pre-anoxic zone 1, a spray pipe is arranged at the bottom of the primary pre-anoxic zone 1, the flow direction of fluid entering in the water inlet of the reactor in the horizontal direction is converted into the vertical direction by the spray pipe, as shown in fig. 1, the spray pipe sprays water upwards vertically, and the water inlet of the reactor is close to the bottom of the tank body and is communicated with the bottom of the spray pipe.
In this embodiment, in order to accelerate the water body, a water body accelerating device is provided, and the structure of the water body accelerating device itself is not limited as long as the accelerating action can be achieved.
As a preferred embodiment, as shown in FIG. 1, a throat is sleeved at the top water outlet of the spray pipe, the throat is vertically arranged and a certain interval is reserved between the throat and the top of the tank body, and the pipe diameter of the throat is larger than that of the spray pipe.
The pipe diameter of the spray pipe gradually decreases along the direction close to the throat, so that the spray pipe can accelerate the sprayed water body, and the mixing effect is improved. The water body is sprayed out from the spray pipe, then enters the throat pipe and is sprayed out from the top of the throat pipe. The pipe diameter of the throat pipe is gradually increased along the direction close to the top of the tank body, so that the water body is diffused to the periphery to be discharged. Furthermore, in order to improve the utilization rate of the medicament, the water flowing out from the top of the throat pipe flows back into the spray pipe again through the gap between the throat pipe and the spray pipe. Because the water flow in the spray pipe has certain water pressure, the circulating operation of the water body can be realized, and the purifying effect is further effectively improved.
In this embodiment, the top of the primary anoxic zone 1 may be open. Preferably, the top of the primary pre-anoxic zone 1 can be sealed, and at the moment, a closed steel plate is arranged at the top of the primary pre-anoxic zone 1, and water body is impacted with the top of the tank body after being sprayed out through the throat, so that the mixing and stirring effects are improved. Under the action of gravity, the water body falls back downwards, and under the action of low pressure formed by spraying water from the spray pipe, the water body is sucked into the throat pipe from the gap between the throat pipe and the spray pipe, and the circulating stirring is performed again. For the whole primary pre-anoxic zone 1, the stirring and mixing of the water body completely depend on the self kinetic energy of the water body, and an additional stirrer is not required to be arranged for stirring.
FIG. 2 is a top view of a self-circulating dual AO biochemical integrated wastewater treatment device provided in one embodiment of the present invention; as shown in fig. 2, two partition boards are disposed at an inner interval of the primary pre-anoxic zone 1, each partition board is vertically disposed, left and right end portions of each partition board can be respectively welded with left and right inner walls of the primary pre-anoxic zone 1, top portions of the partition boards can be welded with top walls of the primary pre-anoxic zone 1, and bottom portions of each partition board flow out of a certain interval with bottom walls of the primary pre-anoxic zone 1, so that bottoms of three first chambers 21 are mutually communicated. Wherein the throat pipe is positioned in the first chamber 21 in the middle, and the first water collecting pipes 27 are positioned in the first chambers 21 at two sides. Wherein, the mounting holes for mounting the first water collecting pipe 27 are all arranged near the top of the primary pre-anoxic zone 1. The left-right direction of the primary anoxic zone 1 is consistent with the length direction of the tank body.
For the secondary pre-anoxic zone 2, a spray pipe is also arranged at the bottom of the secondary pre-anoxic zone 2, and the spray pipe sprays water upwards vertically. Meanwhile, a first water collecting pipe 27 is arranged between the primary pre-anoxic zone 1 and the secondary pre-anoxic zone 2, the arrangement position of the first water collecting pipe 27 is not limited, and the first water collecting pipe can be arranged at the lower part of the primary pre-anoxic zone 1 or at the middle part of the primary pre-anoxic zone 1, so long as the water injection operation into the secondary pre-anoxic zone 2 can be realized.
The part of the first water collecting pipe 27 positioned in the secondary pre-anoxic zone 2 is directly communicated with the bottom of the spray pipe positioned in the secondary pre-anoxic zone 2. The top water outlet of the spray pipe is also sleeved with a throat pipe, the throat pipe is vertically arranged and a certain interval is reserved between the top of the tank body, and the pipe diameter of the throat pipe is larger than that of the spray pipe.
The pipe diameter of the spray pipe gradually reduces along the direction close to the throat, so that the spray pipe can accelerate the sprayed water body, and the mixing effect is improved. The water body is sprayed out from the spray pipe, then enters the throat pipe and is sprayed out from the top of the throat pipe. The pipe diameter of the throat pipe is gradually increased along the direction close to the top of the tank body, so that the water body is diffused to the periphery to be discharged.
Wherein, the inside interval in second grade front-mounted anoxic zone 2 is provided with two baffles, every baffle all vertically sets up, the left and right sides both ends of baffle can be respectively with two inner wall welded connection about the front-mounted anoxic zone 2 of second grade, as shown in fig. 1, the baffle extends from left to right direction in the figure, the top of baffle can with the roof welded connection in front-mounted anoxic zone 2 of second grade, the bottom of every baffle all leaves certain interval with the diapire in front-mounted anoxic zone 2 of second grade, so that the bottom of three second cavity 22 communicates each other. Wherein the throat is located in the middle second chamber 22, and the water inlet of the second water collecting pipe 28 is located in the second chambers 22 at both sides. Wherein, the mounting holes for mounting the second water collecting pipe 28 are all arranged near the top of the secondary pre-anoxic zone 2. The left-right direction of the secondary pre-anoxic zone 2 is consistent with the length direction of the tank body.
For example, the top of the secondary pre-anoxic zone 2 can be sealed, and water body is ejected out through the throat pipe and then collides with the top of the tank body, so that the mixing and stirring effects can be improved. Under the action of gravity, the water body falls downwards, is sucked into the throat pipe from the gap between the throat pipe and the spray pipe under the action of low pressure, and is circularly stirred again. For the whole secondary pre-anoxic zone 2, the stirring and mixing of the water body completely depend on the self kinetic energy of the water body, and an additional stirrer is not required to be arranged for stirring. The jet pipe in the secondary pre-anoxic zone 2 is sprayed to form a micro low pressure, so that the stirring of the internal circulation is not severe, the integrity of the flocs is ensured, and the breaking of the alum flocs is effectively reduced.
For example, in case of a large amount of water, in order to increase the throughput of the single-seat apparatus, one independent primary pre-anoxic zone 1 may be provided, and then a plurality of secondary pre-anoxic zones 2 may be irradiated.
The self-circulation double-AO biochemical integrated sewage treatment device provided by the embodiment is respectively provided with a water body accelerating device in a primary pre-anoxic zone 1 and a secondary pre-anoxic zone 2, wherein the water body accelerating device is provided with a spray pipe and a throat pipe, and a water inlet mask of the throat pipe is arranged above the spray pipe to form an accelerating water channel. After entering the spray pipe from the water inlet of the reactor, the inner diameter of the spray pipe is reduced at least partially, so that the water body can be accelerated after flowing out of the spray pipe and then passes through an acceleration water channel, and the water body is sprayed out from the top opening of the throat pipe and is dispersed to the periphery. Under the action of gravity, the water body falls down, under the action of low pressure, the water body enters an acceleration water channel through the interval between the throat pipe and the spray pipe, and the water body in the primary pre-anoxic zone 1 is stirred in a hydraulic circulation mode. One end of the first water collecting pipe 27 is communicated with the primary pre-anoxic zone 1, the other end of the first water collecting pipe is communicated with the spray pipe in the secondary pre-anoxic zone 2, and the spray pipe and the venturi pipe arranged in the secondary pre-anoxic zone 2 stir the water body in the secondary pre-anoxic zone 2 in a hydraulic circulation mode, so that the stirred water body can flow into a downstream biochemical reaction zone and a sedimentation zone for subsequent purification. In the whole process, the stirring is carried out by means of the kinetic energy of the water body, the stirrer is not required to be arranged in the primary pre-anoxic zone 1 and the secondary pre-anoxic zone 2, the power load of the whole self-circulation double-AO biochemical integrated sewage processor is reduced, the running cost is reduced, and meanwhile, the stirrer is not required to be maintained or replaced, so that the integral maintenance burden of the self-circulation double-AO biochemical integrated sewage processor is reduced.
The water flowing out of the secondary pre-anoxic zone 2 continuously enters the biochemical reaction zone, and for the biochemical reaction zone, independent structures can be respectively arranged between the secondary pre-anoxic zone 2 and the biochemical reaction zone, and a partition plate can be shared at the adjacent part of the biochemical reaction zone and the secondary pre-anoxic zone 2.
For the biochemical reaction zone, a primary reaction zone 3 and a secondary reaction zone 4 are sequentially arranged along the conveying direction of the water body. Wherein, the first-stage reaction zone 3 is communicated with the second-stage pre-anoxic zone 2 through a second water collecting pipe 28, and the second-stage reaction zone 4 is communicated with the first-stage reaction zone 3 through a third water collecting pipe 29.
Wherein, the first-stage reaction zone 3 can be divided into a first-stage synchronous anoxic chamber 24 and two first-stage aerobic chambers 23 by a baffle plate, the two first-stage aerobic chambers 23 are symmetrically distributed on two sides of the first-stage synchronous anoxic chamber 24, the bottom of the first-stage aerobic chamber 23 is communicated with the bottom of the first-stage synchronous anoxic chamber 24, and a water outlet of the second water collecting pipe 28 in the first-stage reaction zone 3 is communicated with the first-stage synchronous anoxic chamber 24.
Fig. 3 is a cross-sectional view along A-A direction in fig. 1, as shown in fig. 3, an inverted V-shaped plate is mounted on the bottom wall of the primary reaction zone 3, the inverted V-shaped plate is disposed along the length direction of the primary reaction zone 3, and is located in the primary synchronous anoxic chamber 24, a certain interval is left between the inverted V-shaped plate and a partition plate in the primary reaction zone 3, as shown by an arrow in fig. 3, water in the primary synchronous anoxic chamber 24 flows from top to bottom, is separated from the bottom and flows to the primary aerobic chambers 23 on two sides respectively, and then flows back to the inside of the primary synchronous anoxic chamber 24 from the top of the primary synchronous anoxic chamber 24. Wherein, the partition board in the primary reaction zone 3 is provided with a through hole near the top wall, so that the water body in the primary aerobic chambers 23 at two sides can infiltrate into the primary synchronous anoxic chamber 24.
Wherein, an aeration disc 15 is arranged at the bottom of the primary aerobic chamber 23 and is used for providing oxygen required by the reaction. Wherein, the first-stage aerobic chamber 23 is filled with suspended filler 16 as a growth carrier of aerobic microorganisms.
Wherein, the secondary reaction zone 4 can be divided into a secondary synchronous anoxic chamber 26 and a secondary aerobic chamber 25 by a baffle plate, the secondary aerobic chamber 25 is circumferentially distributed on three sides of the secondary synchronous anoxic chamber 26, and the bottom of the secondary aerobic chamber 25 is communicated with the bottom of the secondary synchronous anoxic chamber 26.
As shown in fig. 3, the bottom wall of the secondary reaction zone 4 is provided with an inverted V-shaped plate, the inverted V-shaped plate is arranged along the length direction of the secondary reaction zone 4, and is positioned in the secondary synchronous anoxic chamber 26, a certain interval is reserved between the inverted V-shaped plate and a partition plate in the secondary reaction zone 4, water in the secondary synchronous anoxic chamber 26 flows from top to bottom, and the water is separated from the bottom to the peripheral secondary aerobic chamber 25. Wherein, the baffle plate in the secondary reaction zone 4 is provided with a through hole near the top wall, so that the water in the peripheral secondary aerobic chamber 25 can infiltrate into the secondary synchronous anoxic chamber 26.
Wherein, an aeration disc 15 is arranged at the bottom of the secondary aerobic chamber 25 for supplying oxygen required for the reaction. Wherein, the secondary aerobic chamber 25 is filled with suspended filler 16 as a growth carrier of aerobic microorganisms.
As shown in fig. 1 and fig. 2, the secondary reaction zone 4 is communicated with the primary reaction zone 3 through a third water collecting pipe 29, specifically, a water inlet of the third water collecting pipe 29 is arranged in the primary aerobic chamber 23, and a water outlet of the third water collecting pipe 29 is communicated with the secondary synchronous anoxic chamber 26. The water flowing out through the third water collecting pipe 29 flows out from the top position of the secondary synchronous anoxic chamber 26 and then flows into the secondary aerobic chamber 25 through the separation area between the lower part of the secondary synchronous anoxic chamber 26 and the secondary aerobic chamber 25, thereby realizing circulation.
Wherein, a first deflector 17 can be arranged on the top wall of each primary aerobic chamber 23, and the first deflector 17 can be arranged in parallel with a partition plate between the primary reaction zone 3 and the secondary reaction zone 4. A second deflector 18 may be provided at the side wall of each primary aerobic chamber 23 adjacent to the secondary reaction zone 4, and the second deflector 18 may be a V-shaped plate with its open side provided toward the secondary reaction zone 4. A water body passing area is formed between the bottom of the first deflector 17 and the plate surface of the second deflector 18, and after the water body in the primary aerobic chamber 23 passes through the water body passing area, the water body enters the secondary synchronous anoxic chamber 26 under the guidance of the third water collecting pipe 29.
The sedimentation zone is divided into a nitrifying liquid reflux chamber 5, a floc sedimentation compression chamber 6, a floc sedimentation chamber 7 and a filter chamber 8 along the flow direction of the water body.
Wherein, the nitrifying liquid reflux chamber 5 can be communicated with the upstream secondary aerobic chamber 25 through the inverted V-shaped channel 14. The arrangement ensures that the flocs in the secondary reaction zone 4 are retained to the greatest extent, and the intensity and the floc concentration of internal circulation stirring are satisfied; in addition, the section of the water passing section of the inverted V-shaped channel 14 entering the nitrifying liquid backflow chamber 5 is smaller, a larger flow speed is generated, the pressure difference generated by the speed difference drives the upper mud-water mixture to descend, a large vortex is formed, and the flocs are in a suspended rising state similar to a Brownian motion track.
The water body in the nitrifying liquid reflux chamber 5 rises in an accelerating way, smaller flocs are gathered continuously to form larger flocs, a fluidized bed with continuously increased flocs concentration is formed in the region, and the small colloidal particles passing through the fluidized bed are intercepted, gathered and filtered, so that most suspended colloids of the water body can be removed.
Wherein, the nitrifying liquid reflux chamber 5 can be communicated with the spray pipe in the primary pre-anoxic zone 1 through the nitrifying liquid reflux device 12, for example, the nitrifying liquid reflux device 12 can be an L-shaped pipeline, a vertical section of the L-shaped pipeline is positioned in the nitrifying liquid reflux chamber 5, and a water inlet of the vertical section of the L-shaped pipeline can be arranged close to the top of the nitrifying liquid reflux chamber 5.
Wherein, be provided with high density floc in the sedimentation zone and collect fill 11, this high density floc is collected fill 11 and can be the toper funnel form structure, as shown in fig. 1, is provided with upwards gradually sloping swash plate and vertical board on the right side of nitrifying liquid backward flow room 5 to form the toper funnel form structure. A certain interval is reserved between the top of the high-density floc collecting hopper 11 and the top of the tank body so as to allow water to pass through. When the flocs are gathered to a certain degree, the high-density flocs can fall into the downstream high-density floc collecting hopper 11, and the low-density flocs can pass through the high-density floc collecting hopper 11 and continue to be conveyed downstream along with the water body.
When the water body carries the flocs to flow through, the high-density flocs are preferentially settled into the high-density flocs collecting hopper 11, namely, the high-quality high-density flocs are recycled.
Wherein, a flocculation circulation device 13 can be arranged and connected with the bottom of the high-density flocculation collection bucket 11, the flocculation circulation device 13 can be a pipeline which is directly communicated with a spray pipe in the secondary pre-anoxic zone 2 and the high-density flocculation collection bucket 11, and the high-density flocculation is sucked into the secondary pre-anoxic zone 2 by means of low pressure. Or when the debugging is started or the low-turbidity water is treated, the high-density floccules are pumped out through the pump body and then conveyed to the secondary pre-anoxic zone 2, so that the floccules in the secondary pre-anoxic zone 2 are increased.
Wherein, the inner wall in the high-density floc collecting hopper 11 can be welded with mutually crossed rod bodies for assisting in separating the high-density flocs, and can play a role in resisting turbulence to a certain extent.
Wherein, independent structures can be respectively arranged between the biochemical reaction area and the sedimentation area, and a partition board can be shared at the adjacent part of the sedimentation area and the biochemical reaction area.
The downstream of the high-density floc collecting hopper 11 in the sedimentation area is also provided with a hydraulic channel which is formed by a third guide plate 19 arranged vertically and the side wall of the high-density floc collecting hopper 11, one end of the third guide plate 19 is connected with the top wall of the sedimentation area, and the other end extends to the bottom of the floc sedimentation compression chamber 6.
For example, the floc settling compression chamber 6 may have a funnel-shaped structure, and the third deflector 19 is located at the left side of the center line of the floc settling compression chamber 6 in the vertical direction. The water flowing downwards impacts the left bottom wall of the floc sedimentation compression chamber 6 under the guidance of the hydraulic channel and then enters the downstream filtering chamber 8, thereby being beneficial to improving the mixing effect and the space utilization rate.
Above the floc settling compression chamber 6 is provided a separation tube set 9, which separation tube set 9 comprises a plurality of draft tubes. For example, the draft tube may be disposed vertically or may be disposed obliquely. After entering the floc sedimentation compression chamber 6 through the hydraulic channel, the water flows upwards, the larger flocs are directly sunk into the floc sedimentation compression chamber 6, the other part of the flocs and the water flow into the floc sedimentation compression chamber 6 after passing through the separation tube group 9, and the clear water flows out from the top water outlet of the separation tube group 9.
The clean water collecting device 10 above the separation tube set 9 may be a groove structure, the edge of the opening of the groove wall may be provided with a plurality of tooth-shaped openings, the water body is separated by the separation tube set 9 and then flows into the clean water collecting device 10 through the tooth-shaped openings, and the water outlet of the clean water collecting device 10 is communicated with the water outlet of the reactor. Wherein, the water outlet of the reactor is arranged close to the top of the tank body. Wherein the distance between the separating tube set 9 and the clean water collecting device 10 can be adjusted, so that a small part of flocs is prevented from entering the clean water collecting device 10.
Wherein, the flocculation precipitation chamber 7 is arranged at one side of the flocculation sedimentation compression chamber 6 opposite to the high-density flocculation collection hopper 11, the flocculation precipitation chamber 7 can be in a funnel-shaped structure, the opening faces the separation tube group 9, and tiny flocs can be directly discharged out of the tank body through the mud discharging device 20 after falling into the flocculation precipitation chamber 7.
Wherein, the tops of the first-stage pre-anoxic zone 1 and the second-stage pre-anoxic zone 2 are arranged in a closed mode. For example, a closed steel plate can be arranged at the top of the primary pre-anoxic zone 1, and water body is ejected out through the throat pipe and then collides with the top of the tank body, so that the mixing and stirring effects are improved. For example, a closed steel plate can be arranged at the top of the secondary pre-anoxic zone 2, and water body is ejected out through a throat pipe and then collides with the top of the tank body, so that the mixing and stirring effects are improved.
Wherein at least one of the floc settling compression chamber 6, the floc settling chamber 7 and the high-density floc collecting hopper 11 is provided with a sludge discharge device 20 for discharging sludge.
Wherein, at least one of the first-stage pre-anoxic zone 1, the second-stage pre-anoxic zone 2, the biochemical reaction zone and the sedimentation zone is provided with an exhaust valve, so as to ensure that the internal hydraulic conditions meet the process requirements.
Wherein, the top of this jar body still can set up the manhole to make things convenient for maintainer to get into the jar body.
The embodiment also provides a water treatment system, which comprises the self-circulation double-AO biochemical integrated sewage treatment device; the water inlet system is connected with the water inlet of the reactor; and the water purifying system is connected with the water outlet of the reactor.
In one embodiment, the water treatment system further comprises: the sludge treatment system is connected with the sludge discharge device 20.
In conclusion, the self-circulation double-AO biochemical integrated sewage treatment device provided by the invention does not need external power, can realize self-reflux by utilizing self-power, and saves energy consumption.
It should be noted that the low pressure referred to in this application is a relative concept, and the design of each reflux is based on the bernoulli principle, that is, the pressure at the position where the liquid flow rate is high is smaller than the pressure at the position where the liquid flow rate is low, and the reflux is realized by the pressure difference generated by the two positions.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (18)
1. A self-circulating double AO biochemical integrated sewage treatment device, comprising:
a primary pre-anoxic zone (1) provided with a reactor water inlet;
one end of the first water collecting pipe (27) is arranged in the primary pre-anoxic zone (1) and is used for collecting water in the primary pre-anoxic zone (1);
the second-stage pre-anoxic zone (2) is arranged at the downstream of the first-stage pre-anoxic zone (1), and the other end of the first water collecting pipe (27) enters the second-stage pre-anoxic zone (2);
the water body accelerating device is respectively arranged in the primary pre-anoxic zone (1) and the secondary pre-anoxic zone (2), and comprises:
a nozzle adapted to be connected to the other end of the reactor water inlet or the first water collection pipe (27), at least a portion of the inner diameter of the nozzle being reduced in the direction of flow of the body of water;
the throat comprises a throat water inlet and a throat water outlet, the throat water inlet mask is arranged above the spray pipe, and an acceleration water channel is formed between the spray pipe and the throat;
the biochemical reaction zone is arranged at the downstream of the secondary pre-anoxic zone (2);
the sedimentation zone is arranged at the downstream of the biochemical reaction zone, and a reactor water outlet is arranged on the sedimentation zone;
along the width direction of the primary pre-anoxic zone (1), the primary pre-anoxic zone (1) is divided into a plurality of first chambers (21), and the bottoms of the first chambers (21) are communicated;
the throat pipe in the primary pre-anoxic zone (1) is positioned in the first chamber (21) in the middle;
the first chambers (21) on two sides are communicated with the secondary pre-anoxic zone (2) through the first water collecting pipes (27);
along the width direction of the secondary pre-anoxic zone (2), the secondary pre-anoxic zone (2) is divided into a plurality of second chambers (22), and the bottoms of the second chambers (22) are communicated;
the throat pipe in the secondary pre-anoxic zone (2) is positioned in the second chamber (22) in the middle;
the part of the first water collecting pipe (27) positioned in the secondary pre-anoxic zone (2) is communicated with a spray pipe in the secondary pre-anoxic zone (2);
the second chambers (22) on two sides are communicated with the biochemical reaction zone through second water collecting pipes (28);
the sedimentation area is internally divided into a nitrifying liquid reflux chamber (5), a floc sedimentation compression chamber (6), a floc sedimentation chamber (7) and a filter chamber (8) along the flowing direction of the water body;
the nitrifying liquid reflux chamber (5) is communicated with the primary pre-anoxic zone (1);
the filtering chamber (8) is positioned above the floc sedimentation compression chamber (6) and the floc sedimentation chamber (7), and the filtering chamber (8) is communicated with the water outlet of the reactor;
the nitrifying liquid reflux chamber (5) is communicated with the biochemical reaction zone through an inverted V-shaped channel (14);
the device also comprises a nitrifying liquid reflux device (12), one end of which acts in the nitrifying liquid reflux chamber (5), and the other end of which is connected with the spray pipe in the primary pre-anoxic zone (1);
the water inlet of the nitrifying liquid reflux device (12) extends to the top of the nitrifying liquid reflux chamber (5).
2. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
one end of the first water collecting pipe (27) is arranged above the throat pipe.
3. The self-circulating double-AO biochemical integrated sewage treatment apparatus according to claim 2, wherein,
the part of the first water collecting pipe (27) entering the primary pre-anoxic zone (1) is provided with a plurality of water inlet holes.
4. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
at least one part of the spray pipe is arranged in a conical shape along the flowing direction of the water body.
5. The self-circulating double-AO biochemical integrated sewage treatment apparatus according to claim 4, wherein,
at least a part of the area of the throat pipe corresponding to the spray pipe is arranged in a conical shape.
6. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
the biochemical reaction zone comprises a primary reaction zone (3) and a secondary reaction zone (4) along the flow direction of the water body;
the primary reaction zone (3) comprises a primary aerobic chamber (23) and a primary synchronous anoxic chamber (24) which are communicated with each other;
the secondary reaction zone (4) comprises a secondary aerobic chamber (25) and a secondary synchronous anoxic chamber (26) which are communicated with each other;
the second water collecting pipe (28) stretches into the primary synchronous anoxic chamber (24), the primary aerobic chamber (23) is communicated with the secondary synchronous anoxic chamber (26) through a third water collecting pipe (29), and the secondary aerobic chamber (25) is communicated with the downstream sedimentation zone.
7. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 6, wherein,
the first-stage aerobic chamber (23) comprises two symmetrically arranged on two sides of the first-stage synchronous anoxic chamber (24), and the third water collecting pipe (29) comprises a water inlet part connected with the first-stage aerobic chamber (23) and a water outlet part connected with the second-stage synchronous anoxic chamber (26).
8. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 7, wherein,
the top wall of each primary aerobic chamber (23) is provided with a first guide plate (17);
a second deflector (18) is arranged on the side wall of each primary aerobic chamber (23) close to the secondary reaction zone (4);
a water body passing area is formed between the bottom of the first guide plate (17) and the plate surface of the second guide plate (18).
9. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 6, wherein,
the secondary aerobic chamber (25) is arranged around the outer side of the secondary synchronous anoxic chamber (26).
10. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 6, wherein,
the bottom of the primary aerobic chamber (23) and the bottom of the secondary aerobic chamber (25) are respectively provided with an aeration disc (15);
suspended fillers (16) suitable for microorganism growth are arranged in the primary aerobic chamber (23) and the secondary aerobic chamber (25).
11. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
the sedimentation zone also comprises at least one high-density floc collecting hopper (11) which is positioned between the nitrifying liquid reflux chamber (5) and the floc sedimentation compression chamber (6);
and one end of the flocculation circulation device (13) acts in the high-density flocculation collection hopper (11), and the other end of the flocculation circulation device is connected with the spray pipe in the secondary pre-anoxic zone (2).
12. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
the sedimentation zone further comprises a third guide plate (19), one end of the third guide plate is connected with the top wall of the sedimentation zone, and the other end of the third guide plate extends to the bottom of the floc sedimentation compression chamber (6).
13. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
also comprises a separation tube group (9);
the separation tube group (9) is arranged above the floc sedimentation compression chamber (6) and the floc sedimentation chamber (7), and the separation tube group (9) comprises a plurality of flow guide tubes.
14. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 13, wherein,
the device also comprises a clear water collecting device (10) which is arranged above the separation tube group (9) and is connected with the water outlet of the reactor.
15. The self-circulating double-AO biochemical integrated sewage treatment device according to claim 1, wherein,
the tops of the primary pre-anoxic zone (1) and the secondary pre-anoxic zone (2) are arranged in a closed mode.
16. The self-circulating double AO biochemical integrated sewage treatment apparatus of claim 11, wherein,
at least one of the floc sedimentation compression chamber (6), the floc sedimentation chamber (7) and the high-density floc collection hopper (11) is provided with a sludge discharge device (20).
17. A water treatment system, comprising
The self-circulating dual AO biochemical integrated wastewater treatment plant of any one of claims 1-16;
the water inlet system is connected with the water inlet of the reactor;
and the water purifying system is connected with the water outlet of the reactor.
18. The water treatment system of claim 17, wherein the water treatment system further comprises a water treatment system,
further comprises: the sludge treatment system is connected with the sludge discharge device (20).
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