CN111115797A

CN111115797A - Separation device, sewage treatment system and sewage treatment method

Info

Publication number: CN111115797A
Application number: CN201911346096.6A
Authority: CN
Inventors: 宋岱峰; 叶易春; 文晓庆; 柳杰祥
Original assignee: Sichuan Meifute Environment Treatment Co ltd
Current assignee: Sichuan Meifute Environment Treatment Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-05-08

Abstract

The invention discloses a separation device, a sewage treatment system and a sewage treatment method. The separation device comprises: an outer isolation structure forming an outer container, wherein the top of the outer container is provided with a feed inlet for allowing a mixture at least containing water and activated sludge in the aeration tank to flow in, and the bottom of the outer container is provided with a sludge-water separation zone and an activated sludge discharge outlet; an inner barrier structure located within the outer container and forming an inner container, the spacing between the inner and outer containers forming a passageway below the feed inlet; and the flow guide structure is arranged in the channel and used for enabling at least most of the mixture flowing into the channel from the feed inlet to deviate from a vertical path and then flow to the sludge-water separation area. The diversion structure can prolong the residence time of the mixture in the channel, thereby prolonging the anaerobic reaction time. The flow speed of the mixture can be slowed down, and the impact force is reduced to a greater extent. And also has the function of supporting and reinforcing.

Description

Separation device, sewage treatment system and sewage treatment method

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a separation device, a sewage treatment system and a sewage treatment method.

Background

At present, the main core technologies of sewage treatment are an activated sludge method and a biofilm method. The activated sludge method is carried out in an aeration tank, sewage is introduced into the aeration tank, the sewage and the activated sludge in the aeration tank are fully mixed in the dissolved oxygen aeration process to carry out biological oxidation reaction, then the mixture is subjected to solid-liquid separation, and finally organic matters, total nitrogen and total phosphorus in the sewage are removed.

In the traditional sewage treatment process by an aerobic activated sludge method, dissolved oxygen aeration and biological oxidation reaction are firstly carried out in an aeration tank, and then solid-liquid separation is carried out on a mud-water mixture through a sedimentation tank. In order to ensure that the aeration tank has a certain sludge concentration, all or part of the activated sludge obtained by solid-liquid separation in the sedimentation tank must flow back to the aeration tank to participate in the biological reaction process again. In the process, the activated sludge can continuously flow circularly between the aerobic tank and the sedimentation tank, so that on one hand, a large amount of energy is consumed, and on the other hand, the biological activity of the activated sludge is reduced due to the continuous change of the growth environment of microorganisms, and the biodegradation reaction is not facilitated.

The Chinese invention patent CN205973952U discloses an aerobic three-phase separator, which is directly placed in an aeration tank for use, can carry out solid-liquid separation on a mud-water mixture entering the interior of the three-phase separator, realizes the separation of water and activated sludge, outputs the separated water and returns the separated activated sludge to the aeration tank, and has the advantage of saving a secondary sedimentation tank and the sludge reflux power consumption.

However, the smaller part of the diversion area in the separation device is an anoxic area, which can realize a certain denitrification effect, but the effect is very limited; and, in order to prevent the gas from entering the separation device and influencing the sludge sedimentation effect, a gas baffle is arranged between the bottom end of the separation device and the aeration device, the gas can be prevented from entering by the gas baffle, but the gas baffle also has certain influence on the discharge rate of the sludge, and the sludge is not discharged in time to cause blockage because the sludge concentration at the bottom of the separation device is higher. Meanwhile, the gas baffle is arranged above the sludge outlet, so that part of gas enters the sludge-water separation area through the sludge outlet to influence the sludge settling effect. Furthermore, the separation apparatus cannot be used in series.

Disclosure of Invention

The first object of the present invention is to provide a separation apparatus, a sewage treatment system and a sewage treatment method which are excellent in denitrification effect.

A second object of the present invention is to provide a separation device, a sewage treatment system, and a sewage treatment method in which a sludge outlet is not easily clogged.

The third purpose of the invention is to provide a separation device, a sewage treatment system and a sewage treatment method which can be used in series and have high water outlet speed.

A fourth object of the present invention is to provide a separation apparatus, a sewage treatment system, and a sewage treatment method which have a good gas-retaining effect and in which a sludge outlet is not easily clogged.

In order to achieve the first object, the separation device, the sewage treatment system and the sewage treatment method provided by the invention have the following technical scheme:

the separation device is placed in the aeration tank when in use to realize the separation of water and activated sludge and output the separated water and return the separated activated sludge to the aeration tank, and the separation device specifically comprises:

an outer isolation structure forming an outer container, wherein the top of the outer container is provided with a feed inlet for allowing a mixture at least containing water and activated sludge in the aeration tank to flow in, and the bottom of the outer container is provided with a sludge-water separation zone and an activated sludge discharge outlet;

the inner isolation structure is positioned in the outer container and forms an inner container, the interval between the inner container and the outer container forms a channel positioned below the feed inlet, and the channel is communicated with the inner container through the mud-water separation area;

and the flow guide structure is arranged in the channel and used for enabling at least most of the mixture flowing into the channel from the feed inlet to deviate from a vertical path and then flow to the sludge-water separation area.

At least most of the mixture flowing into the channel from the feed inlet deviates from a vertical path to flow by arranging the flow guide structure, so that the retention time of the mixture in the channel can be prolonged, the anaerobic reaction time is prolonged, and the denitrification effect is improved. In addition, the water conservancy diversion structure can play the cushioning effect to the flow of mixture, slows down mixture flow velocity, reduces the impact strength to great limit to be favorable to the natural sedimentation of mud among the mud-water mixture more, promote the mud-water separation effect. Meanwhile, the diversion structure also has the function of supporting and reinforcing, so that the separating device is not easy to deform under the impact of external force, and has better mechanical strength.

Furthermore, the flow guide structure extends from the lower part of the feed inlet to the upper part of the sludge-water separation area or the sludge-water separation area. Therefore, the flow guide effect is better.

Further, the flow guiding structure is connected and supported between the outside isolation structure and the inside isolation structure. Therefore, the separating device has better flow guide effect and supporting effect.

Furthermore, the flow guide structure divides the channel into a plurality of flow passages which are arranged at intervals in the transverse direction of the channel through flow guide parts which are arranged at intervals. Therefore, the channel is partitioned, so that the buffer effect of the diversion structure on the mixture can be further improved, the flow speed of the mixture is reduced, and the anaerobic reaction time is prolonged.

Further, the flow guide structure specifically comprises at least one row of flow guide columns. From this, not only support and strengthen effectually, moreover because the volume of guide post is less relatively, consequently can produce local torrent effect on the contact surface of guide post, stir local mud and water and mix, make the microorganism in pollutant and the activated sludge can more abundant contact reaction to obtain effectively removing the pollutant in the sewage.

Further, the flow guide structure comprises at least two rows of upper and lower flow guide columns, and one row of the upper and lower flow guide columns is staggered with the other row of the upper and lower flow guide columns. From this, set up multirow water conservancy diversion post and can increase the water conservancy diversion effect, promote the number of times that cushioning effect takes place. When the two rows of the guide columns are arranged in a staggered mode, the flow path of the mixture can be further prolonged, and the guide effect is improved.

Further, the upper part of the flow guide column is an arc surface or an inclined surface. Therefore, the sludge is prevented from settling on the diversion column.

Further, the flow guide structure specifically comprises at least one row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the at least one row of guide plates and all extend from top to bottom in a non-completely vertical direction. Compared with the diversion column, the diversion plate is easier to install and more beneficial to natural sedimentation of sludge in the mixture.

Further, each baffle in the at least one row of baffles is arranged in parallel. Therefore, the mixture state at the outlets of the flow paths is consistent, and the stability of the mud-water separation process is convenient to maintain.

Furthermore, the flow guide structure comprises at least two rows of upper and lower guide plates, and one of the upper and lower guide plates is connected with the other guide plate end to end. Thereby, the sludge is more easily settled.

Further, the at least one row of baffles may be formed with flat plates disposed off-vertical so that at least a majority of the mixture flowing from the inlet into the channel flows in a downwardly inclined path. Thus, the sludge can settle along the surface of the flat plate and flow downward.

Further, the included angle between the flat plate and the horizontal plane is 45-60 degrees. If the included angle between the flat plate and the horizontal plane is larger than the numerical range, the buffering effect is poor; if the angle between the flat plate and the horizontal plane is smaller than the above range, the sludge settled on the flat plate is difficult to move downward, and the clogging may be caused. When the included angle between the flat plate and the horizontal plane is 45-60 degrees, the good buffering effect is guaranteed, and the good fluidity of sludge settled on the flat plate can be guaranteed.

Further, the at least one row of baffles is a profiled plate such that at least a majority of the mixture flowing from the feed inlet into the channel flows in a curved downward path. This can significantly extend the length of the flow path and increase the residence time of the mixture.

Further, the dysmorphism board is the folded sheet, the folded sheet has folding unit, folding unit is including the second buffer board of the first buffer board that connects gradually, the contained angle of first buffer board and horizontal plane with the contained angle inequality of second buffer board and horizontal plane. From this, easily acquire and be convenient for the installation, length is easily controlled to can produce local torrent effect in the dog-ear department that the second buffer board of first buffer board formed, this torrent effect can stir the mixture to local mud and water, makes the microorganism among pollutant and the activated sludge can more abundant contact reaction, thereby obtains effectively getting rid of the pollutant in the sewage.

Further, the folding plate has at least two folding units.

Furthermore, the included angle between the first buffer plate and the horizontal plane is an acute angle; the included angle between the second buffer plate and the horizontal plane is more than or equal to 90 degrees. Furthermore, the included angle between the first buffer plate and the horizontal plane is 45-60 degrees; the second buffer plate is 90 ~ 120 with the contained angle of horizontal plane. Thereby, the buffering effect and the local turbulence effect are the best, and the flow of sludge settled on the profiled sheet is facilitated.

Further, the profiled sheet is a corrugated sheet. The corrugated plate also makes it possible to prolong the residence time of the mixture in the channel and to locally generate turbulence effects.

Further, the longitudinal central axis of the wave-shaped plate is not perpendicular to the horizontal plane. Furthermore, the included angle between the longitudinal central axis of the wave-shaped plate and the horizontal plane is 45-60 degrees. Thereby, the buffering effect and the local turbulence effect are the best, and the flow of sludge settled on the profiled sheet is facilitated.

When the water conservancy diversion structure includes two row at least guide plates from top to bottom, preferred setting is that one row of guide plate above adopts the dysmorphism board, and one row of guide plate below adopts the flat board, and from this, the mud of being convenient for subsides along dull and stereotyped surface, promotes the mud-water separation effect of mud-water separation zone.

Furthermore, the distance between two transversely adjacent flow guide parts is 450-500 mm. Thereby, a reasonable buffering effect and mixture flowability are ensured.

Further, the channel is communicated with the mud-water separation zone through a contracted outlet. Therefore, the cross section area at the outlet of the channel is reduced, so that the flow velocity of the mixture flowing through the area is increased, the sludge of the activated sludge discharge port can be flushed when the mixture flows out of the channel, the sludge is pushed to be rapidly discharged, and blockage is prevented.

Furthermore, a clear liquid separation structure for outputting separated water is arranged in the inner container, and the output end of the clear liquid separation structure is arranged at the upper part of the vertically distributed shell of the outer side isolation structure. Firstly, when a plurality of separating devices are connected in series through output ends, the water outlet speed can be effectively increased, thereby being beneficial to improving the sewage treatment efficiency; secondly, the shell that is vertical distribution of outside isolation structure is as the fitting surface that a plurality of separator are connected, helps reducing the total volume after the integration, promotes integrated intensity. Moreover, the output end is arranged at the upper part of the vertically distributed shell, so that the influence on the mud-water separation effect in the mud-water separation area below can be reduced.

And further, a gas blocking structure is arranged below the activated sludge discharge port, the gas blocking structure is provided with a gas blocking surface which forms a sewage discharge gap of activated sludge between the activated sludge discharge port and the gas blocking structure, and the gas blocking structure is connected with the sludge-water separation zone shell through a transition piece. Therefore, the air blocking structure is arranged below the activated sludge discharge port, so that the air blocking effect can be improved, and the gas in the aeration tank is prevented from entering the sludge-water separation area to disturb sludge-water mixture. The transition piece is connected with the air blocking structure and the muddy water separation area shell, so that the structural stability can be improved, and the pollution discharge gap is prevented from deforming under the extrusion of sludge.

The sewage treatment system comprises a sludge-water separation device arranged in an aeration tank, wherein the aeration tank is internally provided with sewage and activated sludge, and the sludge-water separation device comprises any one of the separation devices.

The sewage treatment method comprises the following steps: the sewage is introduced into an aeration tank containing activated sludge and any one of the separation devices described above, the separation device is caused to separate a mixture containing at least water and activated sludge, and the separated water is output and the separated activated sludge is returned to the aeration tank.

In order to achieve the second object, the separation device, the sewage treatment system and the sewage treatment method provided by the invention have the following technical scheme:

the channel is communicated with the mud-water separation zone through the contracted outlet.

Because the cross sectional area at the passage exit reduces, the velocity of flow will grow when consequently the mixture flows through this region for can wash the mud of activated sludge discharge port when the mixture flows out the passageway, promote the mud and discharge fast, prevent to block up.

Further, the cross-sectional area of the mud-water separation area is gradually reduced from top to bottom. Thereby, the sludge in the mixture can settle on the sludge-water separation area shell and move to the activated sludge discharge port to be discharged.

Further, the inner isolation structure extends downwards into the mud-water separation area in a vertical mode. Therefore, the lower end of the inner side isolation structure is matched with the mud-water separation area shell, and the cross section area of the outlet of the channel can be reduced.

And a first impact plate which extends towards the shell of the mud-water separation area and forms a first included angle with the horizontal plane is arranged at the lower end of the inner side isolation structure. Thereby, the cross-sectional area at the channel outlet is gradually reduced.

Further, the first included angle is 55-65 degrees. When the included angle between the first impact plate and the horizontal plane is larger than the numerical range, the flow velocity change of the mixture at the outlet of the channel is not obvious; when the included angle between the first impact plate and the horizontal plane is smaller than the numerical range, the sludge settled on the first impact plate cannot enter the sludge-water separation area in time to block the outlet of the channel. Therefore, when the included angle between the first impact plate and the horizontal plane is 55-65 degrees, the good outflow speed of the mixture and the flowing smoothness of the mixture can be ensured.

And a second impact plate which extends towards the shell of the mud-water separation area and forms a second included angle with the horizontal plane is arranged at the lower end of the first impact plate. The cross-sectional area at the channel outlet is thereby reduced in a gradient manner.

Further, the second included angle is 90 °.

Further, the width of the outlet of the channel is 50-150 mm. Therefore, the mixture can obtain a larger outflow speed and can smoothly flow into the mud-water separation area.

Further, the distance between the outlet of the channel and the activated sludge discharge port is 400-800 mm. Thereby, the anaerobic reaction space and the settling space of the mixture are equilibrated.

In order to achieve the third object, the separation device, the sewage treatment system and the sewage treatment method provided by the invention have the following technical scheme:

and a clear liquid separation structure for outputting separated water is arranged in the inner container, and the output end of the clear liquid separation structure is arranged at the upper part of the vertically distributed shell of the outer side isolation structure.

Firstly, when the output ends of the plurality of separation devices are connected in series, the water outlet speed can be effectively increased, so that the sewage treatment efficiency is improved; secondly, the shell that is vertical distribution of outside isolation structure is as the fitting surface that a plurality of separator are connected, helps reducing the total volume after the integration, promotes integrated intensity. Moreover, the output end is arranged at the upper part of the vertically distributed shell, so that the influence on the mud-water separation effect in the mud-water separation area below can be reduced.

Furthermore, the output ends are arranged on a group of opposite shells which are vertically distributed on the outer side isolation structure. Therefore, the connection mode of the plurality of separation devices can be changed conveniently according to the shape of the aeration tank.

Furthermore, the clear liquid separation structure comprises an overflow groove transversely arranged along the inner container, water obtained by separation in the mud-water separation area overflows into the overflow groove, and the output end is connected with the bottom or the side of the overflow groove through a liquid conveying pipe penetrating through a channel. This makes it possible to efficiently discharge the clear liquid with a simple structure. When the infusion tube is connected with the bottom of the overflow groove, the clear liquid can be discharged more efficiently. Preferably, a sealing structure is arranged at the joint of the infusion tube and the channel. Thereby, the mixture not processed by the separating means is prevented from entering the inner and outer container.

Further, the clear liquid separation structure also comprises a filtering structure arranged between the mud-water separation area and the output end. Therefore, the filtering structure can prevent sludge or other solid matters from entering the clear liquid separating structure to cause incomplete sludge-water separation and blockage of the infusion tube. The output end is arranged above the filtering structure, so that the filtering effect can be prevented from being influenced by the output of the clear liquid. Preferably, the filter structure is detachably connected with the inner isolation structure, so that the filter structure is convenient to replace and maintain. The filtering structure is preferably at least one of an inclined plate filtering mechanism, an inclined tube filtering mechanism, a quartz sand filtering filler layer or an active carbon filtering filler layer.

Further, the output end is provided with a connecting component; the connecting assembly comprises a flange arranged at the output end, and a bolt and a nut matched with the flange hole. Therefore, the installation and the disassembly are convenient. When in butt joint, a gasket can be arranged between the two flanges to achieve a sealing effect.

Further, the number of the separating devices is at least two, and two adjacent separating devices are in butt joint through output ends. Or the separator also comprises at least two water collecting pipes, and the output ends of the separator are connected with the water collecting pipes. Therefore, the drainage flow and the water treatment efficiency are improved.

Furthermore, the separation devices are distributed on two sides of the water collecting pipe, and the number of the separation devices on each side is at least two; the output end of the separation device is connected with the branch pipe of the water collecting pipe. Therefore, the water treatment efficiency is improved, and the occupied area of the system is reduced. Preferably, the separation device is symmetrically distributed on both sides of the water collecting pipe, which further contributes to reducing the floor space.

Furthermore, the device also comprises a bracket, and a lifting lug matched with the bracket is arranged on the outer side isolation structure. This makes it possible to fix the installation height of the separation device.

Furthermore, the lifting lugs are arranged on a group of oppositely distributed shells without the output ends, and the lifting lugs on two sides are at least two. Therefore, the installation of the separating device is convenient, and the installation stability is improved. The lifting lugs are preferably arranged on the vertically distributed and flat-plate-shaped shell, so that the integration level of the system can be improved, and the space loss is reduced. Preferably, two adjacent groups (two groups on the left and right) in front and back are connected with the same bracket, so that the system integration level can be further improved.

In order to achieve the fourth object, the separation device, the sewage treatment system and the sewage treatment method provided by the invention have the following technical scheme:

the activated sludge discharge port is provided with a gas blocking structure below, the gas blocking structure is provided with a gas blocking surface forming a sewage discharge gap of activated sludge between the activated sludge discharge ports, and the gas blocking structure is connected with the sludge-water separation zone shell through a transition piece.

The air blocking structure is arranged below the activated sludge discharge port, so that the air blocking effect can be improved, and the disturbance of the sludge-water mixture caused by the gas in the aeration tank entering the sludge-water separation area is prevented. The transition piece is connected with the air blocking structure and the muddy water separation area shell, so that the structural stability can be improved, the pollution discharge gap is prevented from deforming under the extrusion of sludge, and the stability of sludge discharge is improved.

Further, the air blocking surface is not parallel to the horizontal plane and is not vertical to the horizontal plane. Therefore, the air blocking effect is good, the settled activated sludge is easy to discharge, and meanwhile, the sludge in the mixture can be further settled on the air blocking surface, so that the sludge-water separation effect is improved.

Further, the gas blocking surface comprises a first gas blocking plane and a second gas blocking plane which are matched with the activated sludge discharge port in length, and the first gas blocking plane and the second gas blocking plane are connected with each other and form an inverted V-shaped shape. Therefore, the width of the pollution discharge gap can be conveniently controlled and kept consistent with the width of the pollution discharge gaps on the two sides of the air blocking surface.

Furthermore, the included angle between the first air blocking plane and the second air blocking plane is 70-100 degrees. When the included angle between the first air blocking plane and the second air blocking plane is larger than the numerical range, the flow of sludge settled on the air blocking plane is not facilitated, and blockage can be caused; when the included angle between the first air blocking plane and the second air blocking plane is smaller than the numerical range, the area of the air blocking structure needs to be enlarged if the air blocking effect is required to be ensured. Therefore, when the included angle between the first air blocking plane and the second air blocking plane is 70-100 degrees, the good sludge flowability and air blocking effect can be kept, and the size of the air blocking structure is reduced.

Furthermore, the air blocking structure further comprises a first reinforcing rib connected with the first air blocking plane and the second air blocking plane. Thereby, the relative positions of the first air blocking plane and the second air blocking plane are further fixed, thereby helping to control the stability of the sewage discharge gap.

Further, the transition piece comprises a second reinforcing rib and a reinforcing plate which are connected with the air blocking surface and the outer portion of the mud-water separation area shell. Thus, the transition piece has a simple structure, and the position of the air blocking structure can be effectively fixed.

Further, the muddy water separation zone has two separation plates that the interval from top to bottom reduces gradually, the second strengthening rib is connected the separation plate with keep off the gas face, the reinforcing plate is connected the tip of separation plate and the tip that keeps off the gas face. Therefore, the structure is symmetrical and stable.

Furthermore, at least two second reinforcing ribs are arranged on two sides of the air blocking surface. Therefore, the fixing effect on the air blocking structure is good.

Further, the width of the activated sludge discharge port is 150-350 mm. Therefore, the sewage discharge amount is appropriate, the blockage can not be caused, and the solid-liquid separation effect can not be influenced due to too large flux.

The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:

fig. 1 is a schematic structural view of a separation apparatus according to embodiment a1 of the present invention.

Fig. 2 is a schematic structural diagram of a separation device in embodiment a2 of the present invention.

Fig. 3 is a schematic structural diagram of a separation device according to embodiment B1 of the present invention.

Fig. 4 is a schematic structural diagram of a separation device according to embodiment B2 of the present invention.

Fig. 5 is a schematic structural diagram of a separation device according to embodiment B3 of the present invention.

Fig. 6 is a schematic structural diagram of a separation device according to embodiment C1 of the present invention.

Fig. 7 is a schematic structural diagram of a separation device according to embodiment C2 of the present invention.

Fig. 8 is a schematic structural diagram of a separation device according to embodiment C3 of the present invention.

Fig. 9 is a schematic structural diagram of a separation device according to embodiment C4 of the present invention.

Fig. 10 is a perspective view of a separating apparatus according to embodiment D1 of the present invention.

FIG. 11 is a side view of a separation device according to example D1 of the present invention.

Fig. 12 is a schematic structural diagram of a separation device according to embodiment D2 of the present invention.

Fig. 13 is a schematic structural diagram of a separation device according to embodiment D3 of the present invention.

Fig. 14 is a schematic structural diagram of a separation device according to embodiment D4 of the present invention.

Fig. 15 is a schematic structural diagram of a separation device according to embodiment D5 of the present invention.

Fig. 16 is a schematic structural diagram of a separation device according to embodiment D6 of the present invention.

Fig. 17 is a schematic structural view of a separation device according to embodiment E1 of the present invention.

Fig. 18 is a schematic structural view of a separation device according to embodiment E2 of the present invention.

FIG. 19 is a schematic structural view of an embodiment of the sewage treatment system of the present invention.

FIG. 20 is a schematic structural view of another embodiment of the sewage treatment system of the present invention.

Fig. 21 is a side view of fig. 20.

The relevant references in the above figures are:

100: an outer isolation structure;

110: an outer container;

120: a mud-water separation zone;

121: a separation plate;

130: a blowdown gap;

140: a feed inlet;

200: an inboard isolation structure;

210: an inner container;

300: a gas blocking structure;

310: a first air blocking plane;

320: a second air retaining plane;

330: a reinforcing plate;

340: a first reinforcing rib;

350: a second reinforcing rib;

410: an overflow trough;

420: a transfusion tube;

430: a connecting assembly;

440: a tee joint;

450: a filter structure;

510: a first impingement plate;

520: a second impingement plate;

610: a flat plate;

620: folding the board;

621: a first buffer plate;

622: a second buffer plate;

640: a wave-shaped plate;

650: a flow guide column;

700: a separation device;

800: an aeration tank;

810: an anaerobic zone;

811: a flow pushing device;

812: water distribution holes;

820: an aerobic zone;

821: an aeration device;

822: a gas reflux device;

830: a water collection pipe;

831: a branch pipe;

840: a support;

900: a control room;

910: a fan;

920: a sterilizing device.

Detailed Description

The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:

the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.

Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.

The terms and units in the description and claims, and the associated parts, are not to be construed as limiting the invention. For example, the terms "comprising," "having," and any variations thereof, are intended to cover non-exclusive inclusions. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The terms "inner," "outer," "upper," "bottom," "front," "back," and the like, as used herein, refer to an orientation or positional relationship, if any, that is based on the orientation or positional relationship shown in the drawings, which is meant only to facilitate describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation. The term "activated sludge" refers to a collective term for populations of microorganisms and the organic and inorganic materials to which they are attached. The term "aeration" refers to the process of forced transfer of oxygen from the air into the liquid, with the aim of obtaining sufficient dissolved oxygen.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The separation apparatus 700 of the present invention is placed in the aeration tank 800 to achieve separation of water from activated sludge and to output the separated water and return the separated activated sludge to the aeration tank 800. The conventional separation apparatus 700 includes:

an outer isolation structure 100, the outer isolation structure 100 forming an outer container 110, the top of the outer container 110 being provided with a feed port 140 into which a mixture containing at least water and activated sludge in an aeration tank 800 flows, and the bottom thereof being provided with a sludge-water separation zone 120 and an activated sludge discharge port;

an inner isolation structure 200, wherein the inner isolation structure 200 is positioned in the outer container 110 and forms an inner container 210, a channel positioned below the feed inlet 140 is formed between the inner container 210 and the outer container 110 at a spacing, and the channel is communicated with the inner container 210 through the mud-water separation area 120;

the present invention improves the separation device 700 in four ways:

1. the channels are provided with flow guide structures which are used for enabling at least most of the mixture flowing into the channels from the feed inlet 140 to deviate from a vertical path and then flow to the sludge-water separation zone 120.

At least most of the mixture flowing into the channel from the feed inlet deviates from a vertical path to flow by arranging the flow guide structure, so that the retention time of the mixture in the channel can be prolonged, the anaerobic reaction time is prolonged, and the denitrification effect is improved. In addition, the diversion structure can play a buffering role in the flowing of the mixture, slow down the flowing speed of the mixture and reduce the impact strength to a greater extent, thereby being more beneficial to the natural sedimentation of the sludge in the mud-water mixture. Meanwhile, the diversion structure also has the function of supporting and reinforcing, so that the separating device is not easy to deform under the impact of external force, and has better mechanical strength.

The best effect can be obtained when the flow guiding structure extends from the lower part of the feeding hole 140 to the upper part of the mud-water separation area 120 or the mud-water separation area 120.

When the flow guide structure is connected and supported between the outer insulation structure 100 and the inner insulation structure 200, an optimal flow guide function and support function can be obtained.

When the flow guide structure divides the channel into a plurality of flow passages which are arranged at intervals in the transverse direction of the channel through the flow guide parts arranged at intervals, the buffer effect can be fully exerted. When the distance between two transversely adjacent guide parts is 450-500 mm, better buffering effect and flowability can be ensured.

The flow guide structure preferably adopts, but is not limited to, the following four embodiments:

A. the flow guide structure specifically comprises at least one row of flow guide columns 650; preferably, the flow guiding structure includes at least two rows of upper and lower flow guiding columns 650, and one row of flow guiding columns 650 of the at least two rows of upper and lower flow guiding columns 650 is staggered with the other row of flow guiding columns 650, so that the flow guiding effect can be improved. Preferably, the upper portion of the guide column 650 is a curved surface or an inclined surface, so that sludge is prevented from being deposited on the guide column 650.

B. The flow guide structure specifically comprises at least one row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the at least one row of guide plates and extend from top to bottom in a non-completely vertical direction. Preferably, each baffle of the at least one row of baffles is arranged in parallel. The flow guide structure preferably comprises at least two rows of guide plates, and one of the guide plates in the at least two rows of guide plates is connected with the other guide plate end to end.

The deflector preferably adopts the following structure:

B1. the at least one row of baffles is configured with flat plates 610 disposed off-vertical so that at least a majority of the mixture flowing from the feed inlet 140 into the channel flows in a downward-angled path. Preferably, the included angle between the flat plate 610 and the horizontal plane is 45-60 degrees.

B2. The at least one row of baffles is a profiled plate such that at least a majority of the mixture flowing from the feed inlet 140 into the channel flows in a curved downward path.

The profiled sheet preferably adopts the following structure:

b2.1 the dysmorphism board is folding board 620, folding board 620 has folding unit, folding unit is including the second buffer board 622 of the first buffer board 621 that connects gradually, the contained angle of first buffer board 621 and horizontal plane with the contained angle inequality of second buffer board 622 and horizontal plane. The included angle between the first buffer plate 621 and the horizontal plane is an acute angle, and the included angle between the second buffer plate 622 and the horizontal plane is not less than 90 °. Further preferably, the included angle between the first buffer plate 621 and the horizontal plane is 45-60 degrees; the included angle between the second buffer plate 622 and the horizontal plane is 90-120 degrees. The folding units are preferably at least two.

B2.2. The special-shaped plate is a wave-shaped plate 640. Preferably, the longitudinal central axis of the wave-shaped plate 640 is not perpendicular to the horizontal plane. Further preferably, the included angle between the longitudinal central axis of the wave-shaped plate 640 and the horizontal plane is 45-60 °.

When the diversion structure adopts at least two rows of upper and lower diversion plates, the flat plate 610 of B1 is preferably combined with two special-shaped plates of B2, and the flat plate 610 is arranged below the special-shaped plates, so that the sludge can be conveniently settled on the flat plate 610, and the sludge-water separation effect of the sludge-water separation zone 120 is improved.

When in use, the diversion structure can be connected and fixed with the outer isolation structure 100 and the inner isolation structure 200 by bolts or rivets, but not limited to.

2. The passageway communicates with the sludge-water separation zone 120 through a constricted outlet.

When the cross-sectional area of the sludge-water separation zone 120 is gradually reduced from top to bottom, the sludge in the mixture can be settled on the shell of the sludge-water separation zone 120 and transported to the activated sludge discharge port to be discharged. At this time, the inner isolation structure 200 is vertically extended downward into the sludge-water separation area 120, so as to form a constricted passage outlet.

And/or, the lower end of the inner isolation structure 200 is provided with a first impact plate 510 which extends towards the shell of the sludge-water separation area 120 and forms a first included angle with the horizontal plane, so that the cross-sectional area at the outlet of the channel can be uniformly reduced. Preferably, the first included angle is 55-65 degrees.

Further, when the lower end of the first impact plate 510 is provided with a second impact plate 520 extending towards the housing of the sludge-water separation zone 120 and forming a second angle with the horizontal plane, the cross-sectional area of the channel can be further reduced, and the residence time of the mixture in the channel can be prolonged. Preferably, the second included angle is 90 °.

When the width of the outlet of the channel is 50-150 mm, the mixture can obtain a larger outflow speed and can smoothly flow into the mud-water separation zone 120.

When the distance between the outlet of the channel and the sewage discharge gap 130 is 400-800 mm, the anaerobic reaction space and the settling space of the mixture can be balanced.

3. A clear liquid separation structure for outputting separated water is arranged in the inner container 210, and an output end of the clear liquid separation structure is arranged at the upper part of the vertically distributed shell of the outer isolation structure 100.

Each separation device can be provided with 1 or 2 output ends, so that the connection mode of the separation device can be designed according to the shape of the aeration tank 800.

In one embodiment, the clear liquid separating structure comprises an overflow groove 410 transversely arranged along the inner container 210, the water separated by the sludge-water separating area 120 overflows into the overflow groove 410, and the output end is connected with the bottom or the side of the overflow groove 410 through a liquid conveying pipe 420 penetrating through the channel. In this case, a seal structure is preferably provided at the connection between the infusion tube 420 and the channel.

To prevent sludge or other solids from entering the clean liquid separation structure, the clean liquid separation structure further includes a filter structure 450 disposed between the sludge-water separation zone 120 and the output end.

To facilitate the use of the separating apparatus, the output end is provided with a connecting assembly 430. In one embodiment, the connection assembly 430 includes a flange disposed on the output end and a bolt and nut that fit into a flange hole.

4. An air blocking structure 300 is arranged below the activated sludge discharge port, the air blocking structure 300 is provided with an air blocking surface which forms a sewage discharge gap 130 of activated sludge between the activated sludge discharge port and the activated sludge discharge port, and the air blocking structure 300 is connected with the shell of the sludge-water separation zone 120 through a transition piece.

The air blocking structure is arranged below the activated sludge discharge port, so that the air blocking effect can be improved, and the gas in the aeration tank 800 is prevented from entering the sludge-water separation area to disturb sludge-water mixture. The transition piece is connected with the air blocking structure and the muddy water separation area shell, so that the structural stability can be improved, and the pollution discharge gap is prevented from deforming under the extrusion of sludge.

The air blocking surface is not parallel to the horizontal plane and is not vertical to the horizontal plane, so that the air blocking effect can be improved, and a flowing surface can be provided for sludge.

When the shape of the activated sludge discharge port is a rectangle, a preferred embodiment of the gas barrier structure 300 is: the gas blocking surface comprises a first gas blocking plane 310 and a second gas blocking plane 320 which are matched with the length of the activated sludge discharge port, and the first gas blocking plane 310 and the second gas blocking plane 320 are connected with each other and form an inverted V shape. Preferably, the included angle between the first air blocking plane 310 and the second air blocking plane 320 is 70-100 °. It is preferable that the first rib 340 is provided between the first air blocking plane 310 and the second air blocking plane 320 to fix the relative positions of the first air blocking plane 310 and the second air blocking plane 320.

In one embodiment, the transition piece includes a second stiffener 350 and a stiffener plate 330 connecting the air baffle face and the exterior of the mud and water separation zone 120 housing. When the mud-water separation area 120 has two separation plates 121 with intervals gradually reduced from top to bottom, the second reinforcing rib 350 is connected with the air blocking surface and the separation plates 121, and the reinforcing plate 330 is connected with the end part of the air blocking surface and the end part of the separation plates 121.

The width of the activated sludge discharge port is preferably 150-350 mm. Preferably, at least two second reinforcing ribs are provided on both sides of the air blocking surface to fix the width of the drainage gap 130.

The advantageous effects of the present invention will be described below with reference to specific examples.

Example A1

The separation device 700 as shown in fig. 1 comprises:

an inner isolation structure 200, wherein the inner isolation structure 200 is positioned in the outer container 110 and forms an inner container 210, a channel positioned below the feed inlet 140 is formed between the inner container 210 and the outer container 110 at a distance, and the channel and the inner container 210 are connected through a mud-water separation area 120;

an air blocking structure 300 is arranged below the activated sludge discharge port, the air blocking structure 300 is provided with an air blocking surface which forms a sewage discharge gap 130 of activated sludge between the activated sludge discharge port and the activated sludge discharge port, and the air blocking structure 300 is connected with the shell of the sludge-water separation zone 120 through a transition piece.

The gas blocking surface is not parallel to the horizontal plane and is not vertical to the horizontal plane, and comprises a first gas blocking plane 310 and a second gas blocking plane 320, the first gas blocking plane 310 and the second gas blocking plane 320 are matched with the activated sludge discharge port in length, the first gas blocking plane 310 and the second gas blocking plane 320 are connected with each other to form an inverted V shape, and the included angle between the first gas blocking plane 310 and the second gas blocking plane 320 is 70-100 degrees.

The transition piece includes second strengthening rib 350 and reinforcing plate 330, mud-water separation zone 120 has two separators 121 that the interval from top to bottom reduces gradually, second strengthening rib 350 keeps off the plane 310 and the plane 320 of second fender gas and the separator 121 external connection that corresponds, the tip of the first plane 310 that keeps off gas and the plane 320 of second fender gas and the tip of two separators 121 are connected to reinforcing plate 330. At least two second ribs 350 are disposed on each of the first air blocking plane 310 and the second air blocking plane 320.

The width of the activated sludge discharge port is 150-350 mm.

Example A2

Compared to the embodiment a1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 2, in order to further fix the relative positions of the first air baffle plane 310 and the second air baffle plane 320, the air baffle structure 300 further includes a first rib 340 disposed on the facing surfaces of the first air baffle plane 310 and the second air baffle plane 320 and connecting the first air baffle plane 310 and the second air baffle plane 320.

Example B1

The separation device 700 as shown in fig. 3 comprises:

a clear liquid separating structure for outputting separated water is provided in the inner container 210; the output end of the clear liquid separation structure is arranged at the upper part of the vertically distributed shell of the outer side isolation structure 100.

The clear liquid separating structure comprises an overflow groove 410 which is transversely arranged along the inner container 210, the water obtained by separation in the mud-water separation area 120 overflows into the overflow groove 410, and the output end is connected with the bottom of the overflow groove 410 through a liquid conveying pipe 420 which penetrates through a channel. And a sealing structure is arranged at the joint of the infusion tube 420 and the channel.

The clear liquid separation structure further comprises a filter structure 450 disposed between the sludge-water separation zone 120 and the output end.

The output end is provided with a connecting assembly 430. The connection assembly 430 includes a flange provided at the output end and a bolt and a nut adapted to the flange hole.

Example B2

Compared to embodiment B1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 4, the output ends are disposed on a set of opposite vertically distributed housings of the outer isolation structure 100. At this time, two infusion tubes 420 connected to the two output ends are connected to the bottom of the overflow tank 410 through a tee 440.

Example B3

Compared to embodiment B1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 5, the infusion tube 420 is connected to the sidewall of the overflow groove 410, and the top of the infusion tube 420 is lower than the bottom of the overflow notch of the overflow groove 410.

Example C1

The separation device 700 as shown in fig. 6 comprises:

the passageway communicates with the slurry separation zone 120 through a constricted outlet and is achieved by: as shown in fig. 6, the cross-sectional area of the sludge-water separation area 120 gradually decreases from top to bottom, and a first impact plate 510 extending toward the housing of the sludge-water separation area 120 and forming a first included angle with the horizontal plane is disposed at the lower end of the inner isolation structure 200. The first included angle is 55-65 degrees.

The width of the outlet of the channel is 50-150 mm. The distance between the outlet of the channel and the activated sludge discharge port is 400-800 mm.

Example C2

Compared to embodiment C1, the separation device 700 of the present embodiment has the following differences: the passageway communicates with the slurry separation zone 120 through a constricted outlet and is achieved by: as shown in fig. 7, the cross-sectional area of the sludge-water separation area 120 gradually decreases from top to bottom, and the inner isolation structure 200 extends downward into the sludge-water separation area 120 in a vertical manner and forms a passage outlet between the casing of the sludge-water separation area 120 and the inner isolation structure 200.

Example C3

Compared to embodiment C1, the separation device 700 of the present embodiment has the following differences: the passageway communicates with the slurry separation zone 120 through a constricted outlet and is achieved by: as shown in fig. 8, the cross-sectional area of the sludge-water separation zone 120 gradually decreases from top to bottom, and the inner isolation structure 200 extends downward into the sludge-water separation zone 120 in a vertical manner; the lower end of the inner isolation structure 200 is provided with a first impact plate 510 which extends towards the shell of the mud-water separation area 120 and forms a first included angle with the horizontal plane, and the first included angle is 55-65 degrees.

Example C4

Compared to embodiment C1, the separation device 700 of the present embodiment has the following differences: the passageway communicates with the slurry separation zone 120 through a constricted outlet and is achieved by: as shown in fig. 9, the cross-sectional area of the sludge-water separation zone 120 is gradually reduced from top to bottom; the lower end of the inner isolation structure 200 is provided with a first impact plate 510 which extends towards the shell of the mud-water separation area 120 and forms a first included angle with the horizontal plane, and the first included angle is 55-65 degrees. The lower end of the first impact plate 510 is provided with a second impact plate 520 which extends towards the shell of the sludge-water separation zone 120 and forms a second included angle with the horizontal plane, and the second included angle is 90 °.

The passage width between the outer and

inner isolation structures

100 and 200 in embodiments C1-C4 can be increased due to the provision of the impingement structures.

Example D1

The separation device 700 as shown in fig. 10-11, comprising:

the channels are provided with flow guide structures which are used for enabling at least most of the mixture flowing into the channels from the feed inlet 140 to deviate from a vertical path and then flow to the sludge-water separation zone 120. The flow guiding structure extends from the lower part of the feed inlet 140 to the upper part of the mud-water separation area 120. The flow guide structure is connected and supported between the outer insulation structure 100 and the inner insulation structure 200.

The flow guide structure divides the channel into a plurality of flow paths which are arranged at intervals in the transverse direction of the channel through flow guide parts which are arranged at intervals. The flow guide structure specifically comprises a row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the row of guide plates and extend from top to bottom in a non-completely vertical direction. All the guide plates in the row of guide plates are arranged in parallel.

The row of baffles is configured with flat plates 610 that are positioned off-vertical so that at least a majority of the mixture flowing from the feed inlet 140 into the channel flows in a downward-angled path. The included angle between the flat plate 610 and the horizontal plane is 45-60 degrees.

The distance between the adjacent flow guide parts is 450-500 mm.

Example D2

Compared to embodiment D1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 12, the row of baffles is a profiled plate so that at least most of the mixture flowing from the inlet 140 into the channel flows in a curved downward path. The dysmorphism board is folding plate 620, folding plate 620 has three folding unit, and every folding unit is including the second buffer board 622 of the first buffer board 621 that connects gradually, first buffer board 621 is 45 ~ 60 with the contained angle of horizontal plane, second buffer board 622 is 90 ~ 120 with the contained angle of horizontal plane.

Example D3

Compared to embodiment D2, the separation device 700 of the present embodiment has the following differences: as shown in fig. 13, the irregular plate is a wave-shaped plate 640, and an included angle between a longitudinal central axis of the wave-shaped plate 640 and a horizontal plane is 45-60 °.

Example D4

Compared to embodiment D1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 14, the flow guiding structure comprises two rows of upper and lower end-to-end flow guiding plates, the upper row of flow guiding plates adopts the folding plate 620 of the embodiment D2, and the lower row of flow guiding plates adopts the flat plate 610 of the embodiment D1.

Example D5

Compared to embodiment D1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 15, the flow guiding structure comprises two rows of upper and lower end-to-end flow guiding plates, the upper row of flow guiding plates adopts the wave-shaped plate 640 of the embodiment D3, and the lower row of flow guiding plates adopts the flat plate 610 of the embodiment D1.

Example D6

Compared to embodiment D1, the separation device 700 of the present embodiment has the following differences: as shown in fig. 16, the flow guiding structure specifically includes three rows of flow guiding columns 650 arranged in a staggered manner, and the upper portions of the flow guiding columns 650 are arc surfaces or inclined surfaces.

Example E1

The separation device 700 as shown in fig. 17 comprises:

an air blocking structure 300 is arranged below the activated sludge discharge port, the air blocking structure 300 is provided with an air blocking surface which forms a sewage discharge gap 130 of activated sludge between the activated sludge discharge port and the activated sludge discharge port, and the air blocking structure 300 is connected with the shell of the sludge-water separation zone 120 through a transition piece. The air blocking surface is not parallel to the horizontal plane and is not vertical to the horizontal plane, and comprises a first air blocking plane 310 and a second air blocking plane 320, the length of the first air blocking plane 310 is matched with that of the activated sludge discharge port, the first air blocking plane 310 and the second air blocking plane 320 are connected with each other to form an inverted V shape, and the included angle between the first air blocking plane 310 and the second air blocking plane 320 is 70-100 degrees; the first rib connecting the first air blocking plane 310 and the second air blocking plane 320 is arranged on the opposite surface of the first air blocking plane 310 and the second air blocking plane 320. The transition piece includes second strengthening rib 350 and reinforcing plate 330, mud-water separation zone 120 has two separators 121 that the interval from top to bottom reduces gradually, second strengthening rib 350 keeps off the plane 310 and the plane 320 of second fender gas and the separator 121 external connection that corresponds, the tip of the first plane 310 that keeps off gas and the plane 320 of second fender gas and the tip of two separators 121 are connected to reinforcing plate 330. At least two second ribs 350 are disposed on each of the first air blocking plane 310 and the second air blocking plane 320.

A clear liquid separating structure for outputting separated water is provided in the inner container 210; the output end of the clear liquid separation structure is arranged at the upper part of the vertically distributed shell of the outer side isolation structure 100. The clear liquid separating structure comprises an overflow groove 410 which is transversely arranged along the inner container 210, the water obtained by separation in the mud-water separation area 120 overflows into the overflow groove 410, and the output end is connected with the bottom of the overflow groove 410 through a liquid conveying pipe 420 which penetrates through a channel. And a sealing structure is arranged at the joint of the infusion tube 420 and the channel. The clear liquid separation structure further comprises a filter structure 450 disposed between the sludge-water separation zone 120 and the output end. The clear liquid separation structure inputs water into the water collection pipe, and the output end and the water collection pipe are connected through a connection assembly 430. The connection assembly 430 includes a flange provided on the output end and the header pipe, and a bolt and a nut adapted to a hole of the flange.

The passageway communicates with the slurry separation zone 120 through a constricted outlet and is achieved by: the cross-sectional area of the mud-water separation area 120 gradually decreases from top to bottom, and the inner isolation structure 200 extends downward into the mud-water separation area 120 in a vertical manner. The lower end of the inner isolation structure 200 is provided with a first impact plate 510 which extends towards the shell of the mud-water separation area 120 and forms a first included angle with the horizontal plane, and the first included angle is 55-65 degrees. The width of the outlet of the channel is 50-150 mm. The distance between the outlet of the channel and the activated sludge discharge port is 400-800 mm.

The channels are provided with flow guide structures which are used for enabling at least most of the mixture flowing into the channels from the feed inlet 140 to deviate from a vertical path and then flow to the sludge-water separation zone 120. The flow guiding structure extends from the lower part of the feed inlet 140 to the upper part of the sludge-water separation area 120 or the sludge-water separation area 120. The flow guide structure is connected and supported between the outer insulation structure 100 and the inner insulation structure 200.

The flow guide structure divides the channel into a plurality of flow paths which are arranged at intervals in the transverse direction of the channel through flow guide parts which are arranged at intervals. The distance between the adjacent flow guide parts is 450-500 mm.

The flow guide structure specifically comprises a row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the row of guide plates and extend from top to bottom in a non-completely vertical direction. All the guide plates in the row of guide plates are arranged in parallel. The row of guide plates adopts a flat plate 610 which is arranged in a way of deviating from the vertical direction, so that at least most of the mixture flowing into the channel from the feed port 140 flows in a downward inclined path, and the included angle between the flat plate 610 and the horizontal plane is 45-60 degrees.

Example E2

The separation device 700 as shown in fig. 18, comprises:

The flow guide structure specifically comprises a row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the row of guide plates and extend from top to bottom in a non-completely vertical direction. All the guide plates in the row of guide plates are arranged in parallel. The row of baffles is a profiled plate so that at least a majority of the mixture flowing from the feed opening 140 into the channel flows in a curved downward path. The dysmorphism board is folding plate 620, folding plate 620 has three folding unit, and every folding unit is including the second buffer board 622 of the first buffer board 621 that connects gradually, first buffer board 621 is 45 ~ 60 with the contained angle of horizontal plane, second buffer board 622 is 90 ~ 120 with the contained angle of horizontal plane.

The results of using the same conditions for example E1 and example E2 are shown in Table 1.

TABLE 1

Contrast item	Example E1	Example E2
			Flow rate of sewage entering aeration tank	0.4-0.8m/s	0.4-0.8m/s
Flow rate of slurry mixture after passing through feed port	0.023-0.046m/s	0.023-0.046m/s
			Average flow velocity of slurry mixture at channel outlet	0.018-0.36m/s	0.015-0.030m/s
Water outlet speed of transfusion tube	0.4-0.5m/s	0.4-0.5m/s

As can be seen from Table 1, the outlet rate of the liquid pipe 420 can be adapted to the flow rate of the sewage into the aeration tank 800, which indicates a fast sewage treatment speed.

As can be seen from Table 1, the muddy water mixture of example E1 has a relatively higher average flow rate through the passageways, indicating that the folding plate 620 of the fold line structure of example E2 has a more excellent buffering action for the muddy water mixture. In specific application, the buffering effect of the example E1 is slightly poor, so the method is more suitable for treating the discharged domestic sewage with conventional pollutant content. The embodiment E2 has good buffer effect and longer anaerobic reaction time, thus being suitable for treating the discharged domestic sewage with relatively higher organic pollutant content, ammonia nitrogen and higher total nitrogen content.

The sewage treatment system of the present invention includes a sludge-water separation apparatus 700, wherein in one embodiment, the sludge-water separation apparatus 700 is any one of the separation apparatuses 700 in the above embodiments, and in another embodiment, the sludge-water separation apparatus 700 is formed by connecting a plurality of the separation apparatuses 700 in the above embodiments in series.

When the mud-water separation device 700 is formed by connecting a plurality of separation devices 700 in series, one embodiment is as follows: as shown in fig. 19, the separation device 700 provided at the head is provided with only one output port, the remaining separation devices 700 are provided with two output ports (the separation device according to embodiment B2), one of the output ports of the separation device 700 provided at the tail outputs the separated water to the aeration tank 800 or to the clear liquid storage tank, and the adjacent two separation devices 700 are directly connected by the connection assembly 430 at the output ports.

When the mud-water separation device 700 is formed by connecting a plurality of separation devices 700 in series, another embodiment is as follows: as shown in fig. 20 to 21, the separation device 700 is at least two and the output ends are connected to the branch pipes 831 of the water collecting pipe 830. Preferably, at least two separation devices 700 are disposed on both sides of the water collecting pipe 830, and the separation devices 700 are symmetrically distributed on both sides of the water collecting pipe 830.

The separation device 700 is mounted by using a bracket 840, and a lifting lug matched with the bracket 840 is arranged on the outer isolation structure 100 of the separation device 700. The lifting lugs are preferably arranged on a group of oppositely distributed shells without the output ends, and the two lifting lugs on the two sides are two. Particularly, when the separation devices 700 are connected in series in the manner shown in fig. 20, the two sets of the lifting lugs arranged in this way can connect two adjacent front and back sets (two sets on the left and right sides) to the same bracket 840, thereby improving the system integration.

The two sewage treatment systems can also have the following structures:

the aeration tank 800, wherein the aeration tank 800 is internally provided with activated sludge and biological fillers; the biological filler comprises anaerobic biological filler;

the aeration device 821 is arranged at the bottom of the aeration tank 800;

the control room 900 is internally provided with a fan 910, the fan 910 is communicated with the aeration device 821 through a gas transmission pipeline, and the oxygen content and the aeration-stop ratio of the sewage in the aeration tank 800 are controlled;

so, control aeration time's the ratio of stopping of exposing to the sun through fan 910 in to the reaction purification pond to when sewage quality of water takes place great fluctuation, can guarantee the effective processing to sewage through the change of the ratio of stopping of exposing to the sun, avoided needing to increase sewage treatment device, enlarge area or the condition of extension treatment time takes place, effectively reduced sewage treatment device's area, improved sewage treatment efficiency.

In another embodiment, the aeration tank 800 has another structure, as shown in fig. 19, the aeration tank 800 includes an anaerobic zone 810 and an aerobic zone 820, a partition wall is provided between the anaerobic zone 810 and the aerobic zone 820, a water distribution hole 812 is provided at the lower part of the partition wall, and the sludge-water mixture in the anaerobic zone 810 enters the aerobic zone 820 through the water distribution hole 812; the aeration device 821 is arranged at the bottom of the aerobic zone 820, and the mud-water separation device 700 is arranged in the aerobic zone 820.

Biological filler and activated sludge are filled in the anaerobic zone 810, and a flow pushing device 811 is arranged at the lower part in the anaerobic zone 810.

Sewage firstly enters an anaerobic zone 810, and under the pushing action of a flow pushing device 811, the sewage in the anaerobic zone 810, activated sludge and biological filler are fully mixed and subjected to anaerobic digestion reaction; the mud-water mixture after anaerobic digestion reaction is pushed by the flow pushing device 811 and finally enters the aerobic zone 820 through the water distribution holes 812 towards the water distribution holes 812. The impeller 811 may be, but is not limited to, a propeller mixer.

Further, the sewage treatment system further comprises a gas reflux device 822 which is arranged in the aerobic zone 820 and is communicated with the fan 910 through a gas transmission pipeline, wherein an inlet of the gas reflux device 822 extends to the bottom of the aerobic zone 820, and an outlet of the gas reflux device 822 is communicated with the anaerobic zone 810. Preferably, the gas pipeline of the gas reflux device 822 and the gas pipeline of the aeration device 821 are the same gas pipeline, so that the gas reflux of the activated sludge is realized while the aeration is performed on the aerobic zone 820, and the activated sludge concentration of the anaerobic zone 810 is ensured, thereby effectively ensuring the continuous treatment of the sewage and improving the sewage treatment efficiency. Preferably, the pipe diameter of the return pipeline of the gas return device 822 is larger than that of the gas pipeline, when the fan 910 operates, the fan 910 injects gas into the return pipeline through the gas pipeline, the mud-water mixture in the aerobic zone 820 enters the return pipeline along with the gas and then returns to the anaerobic zone 810, and at the top of the anaerobic zone 810, a local facultative anaerobic zone is formed at the top of the anaerobic zone 810 due to a small amount of gas in the returned mud-water mixture, so that the anaerobic-facultative anaerobic reaction is effectively ensured.

Further, the sewage treatment system further comprises a disinfection device 920, and the disinfection device 920 is communicated with the second channel to disinfect the sewage. The sterilizing device 920 includes at least one of an ultraviolet sterilizer, an ozone generator, and a chlorine dioxide generator. The output end of the infusion tube 420 is communicated with the disinfection device 920, so that the treated sewage can be directly disinfected, the sewage treatment discharge standard is met, and the continuity of sewage treatment is ensured.

The sewage treatment method of the invention comprises the following steps: the sewage is introduced into an aeration tank 800 containing activated sludge, a sludge-water separation device 700 is placed in the aeration tank 800, the sludge-water separation device 700 is any one of the separation devices 700 described above or a combination of any several of the separation devices 700, then the aeration tank 800 is aerated, the sludge-water separation device 700 separates a mixture at least including water and activated sludge, and the separated water is output and the separated activated sludge is returned to the aeration tank 800.

In the specific implementation mode of the invention, the concentration of the activated sludge is 2000-3000 mg/L, and the SV30 is 20-30%.

In the specific implementation mode of the invention, the aeration-stop time ratio of aeration of the aeration structure is 3: 1-6: 1.

In an embodiment of the present invention, the overflow trough 410 has a plurality of overflow notches in the top. Further, an adjusting baffle may be disposed at the overflow notch, and the adjusting baffle is slidably connected to the sidewall of the overflow chute 410 in the vertical direction; thus, the overflow amount can be controlled by adjusting the height of the adjusting baffle, so that the hydraulic residence time of the mud-water mixture in the inner container 210 is ensured. Effectively ensuring the sedimentation of the activated sludge.

In the embodiment of the present invention, when the overall shape of the separating apparatus 700 is a circular shape, the shape of the overflow groove 410 may be adaptively adjusted, for example, the overflow groove 410 may be disposed along a circumference of the inner wall of the inner barrier structure 200.

In the embodiment of the present invention, a row of feed openings 140 is provided at a certain interval in a horizontal direction at the upper portion of the outer insulation structure 100, and the shape of the feed openings 140 is preferably circular or rectangular.

The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.

Claims

1. The separation device is placed in an aeration tank (800) in use to realize the separation of water and activated sludge and output the separated water and return the separated activated sludge to the aeration tank (800), and specifically comprises:

an outer isolation structure (100), wherein the outer isolation structure (100) forms an outer container (110), the top of the outer container (110) is provided with a feed inlet (140) for allowing a mixture at least containing water and activated sludge in an aeration tank (800) to flow in, and the bottom of the outer container is provided with a sludge-water separation zone (120) and an activated sludge discharge outlet;

an inner isolation structure (200), wherein the inner isolation structure (200) is positioned in the outer container (110) and forms an inner container (210), the interval between the inner container (210) and the outer container (110) forms a channel positioned below the feed opening (140), and the channel is communicated with the inner container (210) through a mud-water separation area (120);

the method is characterized in that: the channel is provided with a flow guide structure which is used for enabling at least most of the mixture flowing into the channel from the feed port (140) to deviate from a vertical path and then flow to the sludge-water separation area (120).

2. The separation device of claim 1, wherein: the flow guide structure extends from the lower part of the feed port (140) to the upper part of the mud-water separation area (120) or the mud-water separation area (120).

3. The separation device of claim 1, wherein: the flow guide structure is connected and supported between the outer isolation structure (100) and the inner isolation structure (200).

4. The separation device of claim 1, wherein: the flow guide structure divides the channel into a plurality of flow paths which are arranged at intervals in the transverse direction of the channel through flow guide parts which are arranged at intervals.

5. The separation device of claim 4, wherein: the flow guide structure specifically comprises at least one row of flow guide columns (650).

6. The separation device of claim 5, wherein: the flow guide structure comprises at least two rows of upper and lower flow guide columns (650), and one row of the upper and lower flow guide columns (650) is arranged in a staggered mode with the other row of the upper and lower flow guide columns (650).

7. The separation device of claim 4, wherein: the flow guide structure specifically comprises at least one row of guide plates, and a plurality of flow paths which are arranged at intervals in the transverse direction of the channel are formed by dividing the at least one row of guide plates and extend from top to bottom in a non-completely vertical direction.

8. The separation device of claim 7, wherein: each guide plate in the at least one row of guide plates is arranged in parallel.

9. The separation device of claim 7, wherein: the flow guide structure comprises at least two rows of upper and lower guide plates, and one of the upper and lower guide plates is connected with the other guide plate end to end.

10. The separation device of claim 7, wherein: the at least one row of baffles is configured with a flat plate (610) disposed off-vertical to allow at least a majority of the mixture flowing from the feed inlet (140) into the channel to flow in a downward-angled path.

11. The separation device of claim 10, wherein: the included angle between the flat plate (610) and the horizontal plane is 45-60 degrees.

12. The separation device of claim 7, wherein: the at least one row of baffles is a profiled plate such that at least a majority of the mixture flowing from the feed opening (140) into the channel flows in a curved downward path.

13. The separation device of claim 12, wherein: the dysmorphism board is folding plate (620), folding plate (620) have folding unit, folding unit is including the second buffer board (622) of the first buffer board (621) that connect gradually, the contained angle of first buffer board (621) and horizontal plane with the contained angle inequality of second buffer board (622) and horizontal plane.

14. The separation device of claim 13, wherein: the folding plate (620) has at least two folding units; the included angle between the first buffer plate (621) and the horizontal plane is an acute angle; the included angle between the second buffer plate (622) and the horizontal plane is more than or equal to 90 degrees.

15. The separation device of claim 14, wherein: the included angle between the first buffer plate (621) and the horizontal plane is 45-60 degrees; the included angle between the second buffer plate (622) and the horizontal plane is 90-120 degrees.

16. The separation device of claim 12, wherein: the special-shaped plate is a wave-shaped plate (640).

17. The separation device of claim 16, wherein: the longitudinal central axis of the wave-shaped plate (640) is not vertical to the horizontal plane.

18. The separation device of claim 17, wherein: the included angle between the longitudinal central axis of the wave-shaped plate (640) and the horizontal plane is 45-60 degrees.

19. The separation device of claim 4, wherein: the distance between two adjacent transverse flow guide components is 450-500 mm.

20. The separation device of claim 1, wherein: the passageway communicates with the slurry separation zone (120) through a constricted outlet.

21. The separation device of claim 1, wherein: a clear liquid separation structure for outputting separated water is arranged in the inner container (210), and the output end of the clear liquid separation structure is arranged on a vertically-distributed shell of the outer side isolation structure (100).

22. The separation device of claim 1, wherein: the activated sludge discharge port is provided with a gas blocking structure (300) below, the gas blocking structure (300) is provided with a gas blocking surface which forms a sewage discharge gap (130) of activated sludge between the activated sludge discharge port, and the gas blocking structure (300) is connected with the shell of the sludge-water separation zone (120) through a transition piece.

23. Sewage treatment system, including locating the mud-water separation equipment in aeration tank (800), have sewage and activated sludge in aeration tank (800), its characterized in that: the mud-water separation device comprising the separation device of any one of claims 1 to 22.

24. The sewage treatment method comprises the following steps: passing the sewage into an aeration tank (800) containing activated sludge and a separation device according to any one of claims 1 to 22, causing the separation device to separate a mixture comprising at least water and activated sludge and outputting the separated water and the separated activated sludge to return to the aeration tank (800).