CN115677036A - Siphoning type aerobic granular sludge reactor - Google Patents

Abstract

The application discloses good oxygen granule sludge reactor of hydrocone type, including box, water inlet system, mixing system, aeration systems, row's mud system and siphon water outlet system. The water inlet system, the stirring system, the aeration system, the sludge discharge system and the siphon water outlet system are respectively connected with the box body; the stirring system is used for stirring in the box body; the aeration system is used for aeration in the box body; the sludge discharge system is used for discharging sludge in the box body. Along the height direction of the box body, the siphon water outlet system is positioned above the water inlet system. The water inlet system is used for supplying water to the interior of the box body from the lower portion of the box body, and the siphon water outlet system is configured to discharge upper clear water in the box body in a siphon mode. The application provides an aerobic granular sludge reactor has better water treatment effect.

Description

Siphoning type aerobic granular sludge reactor

Technical Field

The application relates to the technical field of water treatment, in particular to a siphon type aerobic granular sludge reactor.

Background

In recent years, the problems of water resource shortage and water pollution are becoming more severe. An activated sludge method is generally adopted in the biochemical treatment of the existing sewage plant in China, and the method has the problems of sludge expansion, poor settling property, large excess sludge amount, large occupied area, high energy consumption, low treatment efficiency and the like, and limits the efficient treatment of sewage under the large background that high-quality treatment is required in China. The aerobic granular sludge treatment technology is a sewage biochemical tank treatment technology which is gradually mature in recent years, and has a great application prospect. The aerobic granular sludge is a granular and compact-structure microorganism aggregation form formed by the self-coagulation of microorganisms under the aerobic condition, and the aerobic granular sludge treatment technology has the advantages of good settling property, high treatment efficiency, low energy consumption, small occupied area and the like. From the technical point of view, compared with the traditional activated sludge, the problems of sludge expansion, effluent quality deterioration and the like of the aerobic granular sludge can not occur, and the aerobic granular sludge can be widely applied to organic matters which are difficult to degrade in industrial wastewater and has wide applicability.

The conventional aerobic granular sludge treatment technology usually adopts a sequencing batch aerobic granular sludge reactor, the reactor periodically operates according to the sequence of water inlet and outlet/water inlet-standing-aeration-precipitation when sewage is treated, water is synchronously drained while water is fed, namely water inlet and outlet are synchronously fed, high-strength disturbance is avoided when water is fed, otherwise, the water is easily penetrated through a water layer of the reactor to cause partial pollutants to be unreacted and to exceed standards along with the water outlet, the control difficulty is high, a complex automatic control system is required to be matched, and the water treatment effect cannot be ensured.

Disclosure of Invention

The application provides an aerobic granular sludge reactor which has a good water treatment effect.

The application provides a siphon aerobic granular sludge reactor, which comprises a tank body, a water inlet system, a stirring system, an aeration system, a sludge discharge system and a siphon water outlet system;

the water inlet system, the stirring system, the aeration system, the sludge discharge system and the siphon water outlet system are respectively connected with the box body; the stirring system is used for stirring in the box body; the aeration system is used for aeration in the box body; the sludge discharge system is used for discharging sludge in the box body;

the siphon water outlet system is positioned above the water inlet system along the height direction of the box body;

wherein, the water inlet system is used for providing water to the inside of the box body from the lower part of the box body, and the siphon water outlet system is configured to discharge upper clear water in the box body in a siphon mode.

In the scheme, the siphon type aerobic granular sludge reactor is a reactor based on an aerobic granular sludge treatment technology, the reactor is different from the operation mode of completely and synchronously feeding and discharging water of the existing reactor, the reactor realizes water discharge by a siphon water discharge system and by utilizing pressure difference and adopting a siphon mode, and further the problem that the quality of discharged water is influenced by the mixing of the fed water and supernatant liquid caused by the fact that the fed water penetrates through the reactor and the fed water and the discharged water are synchronously fed and discharged for a long time is avoided; meanwhile, the traditional operation step can be broken through, stirring or aeration can be realized while high-strength water is fed, pollutants are mixed more uniformly, the mass transfer efficiency is high, the reaction is started in the water feeding stage, the duration of the non-reaction step can be reduced to the greatest extent, and the effective utilization rate of the tank volume (the internal space of the tank body) is improved.

According to some embodiments of the present application, the siphon outlet system comprises a drain tank, a drain cover, a one-way exhaust valve, and an outlet pipe;

the drainage cover and the drainage groove are arranged in the box body, the cover opening of the drainage cover faces downwards, the drainage groove is arranged in the drainage cover, and the notch of the drainage groove faces upwards; the one-way exhaust valve is arranged outside the box body, is connected with the drainage cover through a pipeline and is used for exhausting air in the drainage cover;

the water inlet end of the water outlet pipe is located inside the box body and connected with the water drainage groove, and the water outlet end of the water outlet pipe is located outside the box body.

Among the above-mentioned scheme, the work of water inlet system, when supplying water in to the box, along with the increase of liquid level, the air pressure rises in the drainage cover, the automatic exhaust of opening of one-way discharge valve above that, treat that the liquid level rises to the water drainage tank, along with going out water (upper portion clear water) and get into the water drainage tank, the play water can be discharged through the outlet pipe fast, can produce certain negative pressure in the drainage cover, the siphon forms, the clear water of upper portion discharges fast, treat that the liquid level falls to the lower limb of drainage cover, the air admission drainage cover, the siphon destroys, the play water is ended. Different from the operation mode of synchronous water inlet and outlet, the water outlet in the scheme is unrelated to water inlet, the power of the water outlet is from negative pressure, and the negative pressure can effectively discharge the clean water at the upper part out of the box body through the water outlet pipe.

According to some embodiments of the application, the bottom of the drainage groove is provided with a slope of 1-5%, and the water inlet end of the water outlet pipe is connected with the bottom of the groove.

According to some embodiments of the application, the outlet end of the outlet pipe is provided with a flow regulating valve.

In the above scheme, the controllable flow regulating valve can regulate the water outlet flow, which can be generally far greater than the water inlet flow, so that the drainage time is shortened under the controllable condition.

According to some embodiments of the present application, the tank has a rectangular cross-section, and the drain cover has a rectangular cross-section;

the length of the drainage cover is smaller than that of the box body, and gaps are reserved between two ends of the drainage cover in the length direction and the wall surface of the box body.

Among the above-mentioned scheme, the length of drainage cover than the box is short, so can not be with box inner space partition for two spaces, avoid dividing into two parts and influence the mixed mass transfer on the water upper portion in the box, guarantee water treatment's effect.

According to some embodiments of the present application, the water intake system comprises a water inlet pipe, a water distribution pipeline, a forward and reverse flushing and emptying pipe, and an exhaust pipe;

the water inlet pipe is positioned at the bottom of the box body and is connected with the water distribution pipeline in the box body;

the water distribution pipeline comprises a main water distribution pipe, branch water distribution pipes and bread water distribution pipes, the main water distribution pipe is connected with the water inlet pipe and connected with the plurality of branch water distribution pipes, the plurality of branch water distribution pipes are arranged at intervals, and each branch water distribution pipe is provided with one bread water distribution pipe;

the forward and reverse flushing and emptying pipe is connected with the main water distribution pipe and is provided with a valve;

the air inlet end of the exhaust pipe is connected with each bread water distribution pipe and is close to the main water distribution pipe, and the exhaust end of the exhaust pipe is located outside the box body and is provided with a valve.

In the above scheme, the water inlet system can uniformly supply water into the box body through the plurality of water distribution branch pipes and the surface covering water distribution pipe, so that the stability of the water body in the box body is ensured, and the water treatment effect is ensured. In some embodiments, the valve at the exhaust end of the exhaust pipe may be an electrically operated valve. In some embodiments, the exhaust pipe is higher than the water distribution pipeline to ensure that the air in the water distribution pipeline is effectively exhausted.

According to some embodiments of the application, the mixing system includes the low-speed agitator, the low-speed agitator includes motor and impeller, the motor is fixed in the wall of box, impeller is located the inside of box and is located arrange mud system with between the water intake system.

In the above solution, the stirring system is a side stirring system, i.e. disposed at the side of the reactor, in some other embodiments, the stirring system may be a vertical stirring system, i.e. disposed at the top of the reactor, and a vertical shaft stirrer in a vertical installation form.

According to some embodiments of the present application, the aeration system comprises an aeration main pipe, an aeration branch pipe, an aeration disc and a drain pipe;

the inlet of the main aeration pipe is positioned outside the box body and extends to the bottom of the box body from the top end of the box body along the inner wall of the box body, the outlet of the main aeration pipe is connected with a plurality of branch aeration pipes, the branch aeration pipes are arranged at intervals, and each branch aeration pipe is provided with a plurality of aeration discs; the water inlet of the water drain pipe is connected with the main aeration pipe and is positioned in the box body, and the water outlet of the water drain pipe is positioned above the liquid level of the reactor.

In the scheme, the aeration branch pipes and the aeration discs are positioned below the water inlet system, and outside air (aeration gas) enters each aeration branch pipe from the main aeration pipe and is uniformly distributed in the box body through each aeration disc, so that an aeration process in the aerobic granular sludge treatment technology is realized.

According to some embodiments of the present application, the sludge discharge system comprises a residual sludge discharge pipe and an annular sludge discharge pipe, the annular sludge discharge pipe is arranged in the tank body and is positioned between the siphon water outlet system and the aeration system; the wall of the annular sludge discharge pipe is provided with a plurality of sludge discharge holes;

one end of the excess sludge discharge pipe is connected with the annular sludge discharge pipe, and the other end of the excess sludge discharge pipe is positioned outside the box body.

In the scheme, the part of the residual sludge discharge pipe, which is positioned outside the box body, can be provided with a valve so as to control whether the sludge is discharged from the box body.

According to some embodiments of the application, the siphonic aerobic granular sludge reactor further comprises a matching system, wherein the matching system comprises a ladder stand arranged on the outer wall of the box body and a liquid level meter arranged inside the box body.

Compared with the prior art, the technical scheme provided by the application has the beneficial effects that:

the running mode of completely synchronous water inlet and outlet is cancelled, the clear water is discharged by adopting a siphon mode, the water inlet and the water outlet can be asynchronous, and the water outlet flow is irrelevant to the flow, so that the limitation of the rising flow rate of the water inlet is eliminated, the water inlet flow can be adjusted according to the requirement, and the risk of over standard water outlet caused by overhigh water inlet speed is reduced; the traditional operation step is broken through, stirring or aeration can be realized while high-strength water is fed, pollutants are mixed more uniformly, the mass transfer efficiency is high, the reaction is started in the water feeding stage, and the effect and the efficiency of water treatment can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a top view of a siphonic aerobic granular sludge reactor according to some embodiments of the present application;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a water inlet system and a blending system in accordance with certain embodiments of the present disclosure;

fig. 4 is a schematic view of an aeration system in some embodiments of the present application.

An icon: 10-a box body; 11-a water inlet system; 12-a stirring system; 13-an aeration system; 14-a sludge discharge system; 15-siphon water outlet system;

150-a drainage channel; 151-a drain cover; 152-one-way exhaust valve; 153-a water outlet pipe; 154-flow regulating valve;

110-a water inlet pipe; 111-water distribution pipeline; 112-positive and negative flushing and emptying pipe; 113-exhaust pipe; 1110-main water distribution pipe; 1111-water distribution branch pipe; 1112-bread water distributor;

120-low speed agitator; 121-a motor; 122-a stirring impeller;

130-aeration main pipe; 131-aeration branch pipes; 132-aeration disk; 133-a water drain pipe;

140-residual sludge discharge pipe; 141-ring-shaped mud pipe;

160-ladder stand.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the product of the application will usually place when in use, or the orientations or positional relationships that a person skilled in the art will usually understand, are only used for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and therefore, should not be construed as limiting the present application.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

At present, the main stream operation mode of the aerobic granular sludge technology is still a sequencing batch mode, namely four stages of water inlet, aeration, sedimentation and water outlet are completed in the same reactor. The inventor finds that the conventional sequencing batch aerobic granular sludge reactor has the problem of low treatment efficiency, and researches show that the main reason of low water treatment efficiency and poor effect of the conventional sequencing batch aerobic granular sludge reactor is that the conventional reactor adopts synchronous water inlet and outlet, namely, clean water precipitated at the upper part of the reactor is pushed to be synchronously discharged through a water outlet groove while water is fed. However, this type of reactor has problems in that:

(1) The synchronous water inlet and outlet are adopted, namely, the clear water precipitated at the upper part of the reactor is pushed to be synchronously discharged through the water outlet groove while water is fed. The water inflow needs to avoid high-intensity disturbance, so the rising flow rate of the inflow needs to be controlled, the water inflow time is generally 1-2h, otherwise the inflow easily penetrates through the water layer of the reactor, so that part of pollutants are not reacted and are discharged along with the effluent, so that the standard exceeding is caused, and in order to solve the problems, the effective water depth of the reactor is generally set to be deeper, so the technology cannot be completely suitable for the transformation of the biochemical pool of the current sewage treatment plant; (2) In order to avoid disturbance of a water layer, the water cannot be stirred when entering water, and sewage and sludge cannot be fully mixed in the process, so that the reaction efficiency is low in the water inlet stage. (3) In order to avoid disturbance of a water layer, aeration can not be carried out when water enters, and aeration is carried out only in an aeration stage; (4) After the drainage is finished, in order to prevent part of muddy water mixed liquor from being brought out during aeration, the rapid precipitation with the height of 10-20cm is generally needed, and rapid precipitation equipment is needed to be configured, so that the configuration of system equipment is increased; (5) The uniformity of water distribution needs to be ensured, and the water distribution of inlet water generally adopts high-resistance water distribution, so that the energy consumption is relatively high.

In view of the above, the inventor designs a siphon aerobic granular sludge reactor, which cancels a completely synchronous water inlet and outlet operation mode, and utilizes the siphon principle (pressure difference) to pump out the upper clear water in the reactor, so that the problem that the inlet water easily penetrates through the water layer of the reactor to cause partial pollutants to be discharged along with the outlet water without reaction to cause exceeding standards is avoided, the water inlet time can be shortened, and the stirring and aeration can be carried out while the inlet water is fed, thereby ensuring the treatment efficiency and effect; meanwhile, the limitation of the height of the reactor caused by solving the problem of water penetration is avoided, so that the requirement of water distribution uniformity is lowered.

Some embodiments of the present application providebase:Sub>A siphonic aerobic granular sludge reactor, referring to fig. 1-4, fig. 1 isbase:Sub>A top view of the siphonic aerobic granular sludge reactor in some embodiments of the present application, fig. 2 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1, fig. 3 isbase:Sub>A schematic view ofbase:Sub>A water inlet system and an agitation system in some embodiments of the present application, and fig. 4 isbase:Sub>A schematic view of an aeration system in some embodiments of the present application.

The siphon aerobic granular sludge reactor comprises a box body 10, a water inlet system 11, a stirring system 12, an aeration system 13, a sludge discharge system 14 and a siphon water outlet system 15.

The water inlet system 11, the stirring system 12, the aeration system 13, the sludge discharge system 14 and the siphon water outlet system 15 are respectively connected with the box body 10; the stirring system 12 is used for stirring in the box body 10; the aeration system 13 is used for aeration in the box body 10; the sludge discharge system 14 is used for discharging sludge in the tank 10.

The siphon outlet system 15 is located above the inlet system 11 along the height direction of the tank 10. The water inlet system 11 is used for supplying water from the lower part of the tank 10 to the inside of the tank 10, and the siphon water outlet system 15 is configured to discharge upper clean water in the tank 10 by means of siphon.

The upper clear water refers to water on the upper part of the box body 10 after being treated by the siphon type aerobic granular sludge reactor.

In the scheme, the siphon type aerobic granular sludge reactor is a reactor based on an aerobic granular sludge treatment technology, the reactor is different from the operation mode of completely and synchronously feeding and discharging water in the existing reactor, the reactor realizes water discharge by utilizing pressure difference in a siphon mode through a siphon water discharge system 15, and further the problem that the quality of discharged water is influenced by the mixing of the fed water and supernatant liquid caused by the fact that the fed water penetrates through the reactor and the fed water is synchronously fed and discharged for a long time is avoided; meanwhile, the traditional operation step can be broken through, stirring or aeration can be realized while high-strength water is fed, pollutants are mixed more uniformly, the mass transfer efficiency is high, the reaction is started in the water feeding stage, the duration of the non-reaction step can be reduced to the greatest extent, and the effective utilization rate of the tank volume (the inner space of the tank body 10) is improved.

According to some embodiments of the present application, the siphon outlet system 15 includes a drain tank 150, a drain cover 151, a one-way vent valve 152, and an outlet pipe 153. The drainage cover 151 and the drainage channel 150 are arranged in the box body 10, the cover opening of the drainage cover 151 faces downwards, the drainage channel 150 is arranged in the drainage cover 151, and the notch of the drainage channel 150 faces upwards; the one-way exhaust valve 152 is provided outside the case 10 and connected to the drain cover 151 through a pipe for exhausting air inside the drain cover 151.

The inlet end of the outlet pipe 153 is located inside the tank 10 and connected to the drain tank 150, and the outlet end of the outlet pipe 153 is located outside the tank 10.

Referring to fig. 2, the cover opening of the drain cover 151 is located on a plane flush with the level of the drain water in the tank 10 (the drain water level is denoted by reference numeral B in fig. 2). The plane of the notch of the drain groove 150 is located between the plane of the cover opening of the drain cover 151 and the plane of the drain cover 151. Wherein the level of the opening of the water discharge groove 150 is higher than the aeration operation level (indicated by reference character C in fig. 2) in the tank 10, that is, the water level in the tank 10 is lower than the level of the opening of the water discharge groove 150 when the aeration system 13 is in operation.

In the above scheme, the water inlet system 11 works, when supplying water into the box 10, along with the rising of liquid level, the air pressure in the drainage cover 151 rises, the one-way exhaust valve 152 on it automatically opens the exhaust, when treating that the liquid level rises to the drainage tank 150, along with going out water (upper clear water) and getting into the drainage tank 150, it can discharge through outlet pipe 153 fast to go out water, can produce certain negative pressure in the drainage cover 151, the siphon forms, the clear water in upper portion discharges fast, when treating that the liquid level falls to the lower limb of drainage cover 151, the air gets into the drainage cover 151, the siphon destroys, the play water finishes. Different from the operation mode of synchronous water inlet and outlet, the water outlet in the scheme is unrelated to water inlet, the power of the water outlet comes from negative pressure, and the negative pressure can effectively discharge the upper clean water out of the box body 10 through the water outlet pipe 153.

According to some embodiments of the present application, the bottom of the drainage channel 150 is provided with a slope of 1% -5%, and the water inlet end of the water outlet pipe 153 is connected to the bottom of the channel.

In some embodiments, the bottom of the drainage channel 150 is sloped (the slope may be any value between 1% and 5%), and is sloped along the center of the bottom of the channel, which is connected to the water inlet end of the water outlet pipe 153, so that water will quickly focus on the center of the bottom of the channel under the action of gravity and finally be drained out of the water outlet pipe 153.

According to some embodiments of the present application, the outlet end of the outlet pipe 153 is provided with a flow regulating valve 154.

In the above scheme, the controllable flow control valve 154 can regulate the water outlet flow, which is generally much larger than the water inlet flow, so as to shorten the water discharging time under the controllable condition.

According to some embodiments of the present application, please refer to fig. 1, the cross-section of the box 10 is rectangular, and the cross-section of the drain cover 151 is rectangular; the length of the drain cover 151 is smaller than that of the tank 10, and both ends of the drain cover 151 in the length direction thereof have a gap with the wall surface of the tank 10.

Wherein in some embodiments, the drain channel 150 is correspondingly rectangular.

In the above scheme, the length of the drainage cover 151 is shorter than that of the tank 10, so that the internal space of the tank 10 is not divided into two spaces, the influence on mixed mass transfer caused by dividing the upper part of the water body in the tank 10 into two parts is avoided, and the water treatment effect is ensured.

It should be noted that in other embodiments, the cross section of the box body may be circular.

In other embodiments, the drain cover 151 may have a ring shape, and correspondingly, the drain groove 150 may also have a ring shape. When the drain cover 151 and the drain groove 150 are annular, the inner rings of the two can provide space for a vertical shaft stirrer to be disposed in the box 10, and the vertical shaft stirrer can achieve a stirring effect.

According to some embodiments of the present application, referring to FIG. 3, the water inlet system 11 includes a water inlet pipe 110, a water distribution pipe 111, a forward and reverse flushing and venting pipe 112, and an exhaust pipe 113.

The water inlet pipe 110 is located at the bottom of the tank 10 and is connected to a water distribution pipe 111 in the tank 10. The water distribution pipeline 111 includes a main water distribution pipe 1110, branch water distribution pipes 1111, and bread water distribution pipes 1112, the main water distribution pipe 1110 is connected to the water inlet pipe 110 and connected to the plurality of branch water distribution pipes 1111, the plurality of branch water distribution pipes 1111 are arranged at intervals, and each branch water distribution pipe 1111 is provided with one bread water distribution pipe 1112.

The forward and reverse flushing and venting pipes are connected to the main water distribution pipe 1110 and are provided with valves (not shown). The inlet end of the exhaust pipe 113 is connected to each of the cloth water distribution pipes 1112 and is close to the water distribution main pipe 1110, and the outlet end of the exhaust pipe 113 is located outside the tank 10 and is provided with a valve.

In the above scheme, the water inlet system 11 can uniformly supply water into the tank 10 through the plurality of water distribution branch pipes 1111 and the bread water distribution pipe 1112, so as to ensure the stability of the water in the tank 10 and ensure the water treatment effect. In some embodiments, the valve at the exhaust end of the exhaust pipe 113 may be an electrically actuated valve. In some embodiments, the exhaust pipe 113 is higher than the water distribution pipeline 111 to ensure that the air in the water distribution pipeline 111 is effectively exhausted.

According to some embodiments of the present application, as shown in fig. 3, the stirring system 12 includes a low-speed stirrer 120, the low-speed stirrer 120 includes a motor 121 and a stirring impeller 122, the motor 121 is fixed to the wall surface of the tank 10, and the stirring impeller 122 is located inside the tank 10 and between the sludge discharge system 14 and the water inlet system 11.

In the above solution, the stirring system 12 is a side stirring system, i.e. is disposed at the side of the reactor, in some other embodiments, the stirring system 12 may be a vertical stirring system, i.e. a vertical shaft stirrer disposed at the top of the reactor in a vertical installation manner.

According to some embodiments of the present application, referring to fig. 4, the aeration system 13 includes an aeration main pipe 130, aeration branch pipes 131, aeration disks 132, and a drain pipe 133. The inlet of the main aeration pipe 130 is located outside the tank 10 and extends from the top end of the tank 10 to the bottom of the tank 10 along the inner wall of the tank 10, the outlet of the main aeration pipe 130 is connected with a plurality of branch aeration pipes 131, the plurality of branch aeration pipes 131 are arranged at intervals, and each branch aeration pipe 131 is provided with a plurality of aeration discs 132; the water inlet of the water drain pipe 133 is connected with the main aeration pipe 130 and is positioned in the tank 10, and the water outlet of the water drain pipe 133 is positioned above the liquid level of the reactor.

In the above scheme, the aeration branch pipes 131 and the aeration discs 132 are located below the water inlet system 11, and outside air (aeration gas) enters each aeration branch pipe 131 from the main aeration pipe 130 and is uniformly distributed in the tank 10 through each aeration disc 132, so as to realize an aeration process in the aerobic granular sludge treatment technology.

According to some embodiments of the present application, the sludge discharge system 14 comprises a residual sludge discharge pipe 140 and an annular sludge discharge pipe 141, the annular sludge discharge pipe 141 being provided inside the tank 10 and between the siphon water outlet system 15 and the aeration system 13; the wall of the annular sludge discharge pipe 141 is formed with a plurality of sludge discharge holes.

One end of the surplus sludge discharging pipe 140 is connected with the annular sludge discharging pipe 141, and the other end of the surplus sludge discharging pipe 140 is positioned outside the box body 10.

In the above scheme, a valve (sludge discharge valve) may be disposed at a position of the excess sludge discharge pipe 140 outside the tank 10 to control whether the sludge is discharged from the tank 10.

According to some embodiments of the present application, the siphonic aerobic granular sludge reactor further comprises a matching system, wherein the matching system comprises a ladder stand 160 arranged on the outer wall of the box body 10 and a liquid level meter arranged inside the box body 10. Referring to fig. 1, a ladder stand 160 is provided on an outer wall of a box 10 for maintenance personnel to climb for maintenance. The level gauge is used to monitor the level of the liquid inside the tank 10.

The operation process of the siphonic aerobic granular sludge reactor provided by some embodiments of the application can be as follows:

water inflow and drainage: after the last cycle is finished (the last step of the last cycle is deposition), water starts to enter, low-intensity water inlet can be adopted at the initial stage, the air pressure in the drainage cover rises along with the liquid level rise, the one-way exhaust valve on the drainage cover automatically opens the exhaust, when the liquid level rises to the notch of the drainage groove, the water enters the drainage groove along with the water outlet, the water can be discharged through the water outlet pipe quickly, certain negative pressure can be generated in the drainage cover, siphoning is formed, clear water on the upper portion of the reactor is discharged quickly, when the liquid level falls to the lower edge of the drainage cover, the air enters the drainage cover, siphoning is broken, and the water outlet is finished. The water outlet time can be adjusted by the flow adjusting valve and can be set to be 10-30min, the water inlet strength can be increased after the water outlet is finished, the low-speed stirrer or the aeration system can be started according to the process requirements, the water stored in the reactor is fully mixed with the water inlet, the liquid level rises to the set position of the liquid level meter (namely, the position of the notch of the drainage tank is slightly lower, namely, the liquid level C is operated), the water inlet is stopped, and the water inlet stage is finished. And starting a low-speed stirrer in the water inlet process, wherein reactions such as denitrification, anaerobic phosphorus release, carbon source extracellular adsorption and intracellular transformation mainly occur in the stage. And starting an aeration system in the water inlet process, and carrying out reactions such as nitrification, denitrification, synchronous nitrification and denitrification, aerobic phosphorus absorption, denitrification phosphorus removal, organic matter degradation and the like in the stage.

And (3) an aeration stage: after the water inlet stage is finished or in the high-strength water inlet stage, an aeration system is started for aeration, and reactions such as nitrification, denitrification, synchronous nitrification and denitrification, aerobic phosphorus absorption, organic matter degradation and the like occur in the aeration stage.

A sedimentation sludge discharge stage: stopping aeration, settling sewage statically, precipitating large-particle-size granular sludge quickly, precipitating small-particle-size sludge and flocculent sludge slowly, and opening a sludge discharge valve timely to discharge the small-particle-size flocculent sludge in the sewage so as to enrich the granular sludge. And entering the next period after the precipitation is finished.

Compared with the traditional aerobic granular sludge reactor, the siphon-type aerobic granular sludge reactor provided by some embodiments of the application has the following advantages:

1. the operation mode of completely and synchronously feeding and discharging water is cancelled, the water discharging adopts siphon water discharging, the water discharging flow is irrelevant to the water inlet flow, the water discharging flow can be adjusted according to the flow adjusting valve and can be far larger than the water inlet flow generally, the water discharging time is shortened, and the problem that the quality of the discharged water is influenced by the mixing of the water inlet and the supernatant liquid caused by the penetration of the water inlet into the reactor and the long-time synchronous water feeding and discharging is avoided.

2. The limitation of the rising flow rate of the inlet water is eliminated, and the inlet water flow can be adjusted according to the requirement;

3. the reactor is not limited by height, and the compatibility with the current sewage treatment and transformation project is good;

4. the traditional operation step is broken through, the stirring or aeration can be realized while high-strength water inflow is realized, the pollutants are mixed more uniformly, the mass transfer efficiency is high, and the reaction is started in the water inflow stage. The duration of the non-reaction step sequence can be reduced to the utmost extent, and the effective utilization rate of the tank capacity is improved.

5. The requirement on the water distribution uniformity of a water distribution system is reduced, and the energy consumption can be saved by adopting small-resistance water distribution.

6. And a quick precipitation system is not required to be arranged, and the equipment configuration is simplified.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A siphon aerobic granular sludge reactor is characterized by comprising a tank body, a water inlet system, a stirring system, an aeration system, a sludge discharge system and a siphon water outlet system;

the water inlet system, the stirring system, the aeration system, the sludge discharge system and the siphon water outlet system are respectively connected with the box body; the stirring system is used for stirring in the box body; the aeration system is used for aerating in the box body; the sludge discharge system is used for discharging sludge in the box body;

along the height direction of the box body, the siphon water outlet system is positioned above the water inlet system;

wherein, the water inlet system is used for providing water to the inside of the box body from the lower part of the box body, and the siphon water outlet system is configured to discharge the upper clear water in the box body in a siphon mode.

2. The siphonic aerobic granular sludge reactor according to claim 1,

the siphon water outlet system comprises a water drainage groove, a water drainage cover, a one-way exhaust valve and a water outlet pipe;

the drainage cover and the drainage groove are arranged in the box body, the cover opening of the drainage cover faces downwards, the drainage groove is arranged in the drainage cover, and the notch of the drainage groove faces upwards; the one-way exhaust valve is arranged outside the box body, is connected with the drainage cover through a pipeline and is used for exhausting air in the drainage cover;

the water inlet end of the water outlet pipe is located inside the box body and connected with the water drainage groove, and the water outlet end of the water outlet pipe is located outside the box body.

3. The siphonic aerobic granular sludge reactor according to claim 2,

the bottom of the drainage groove is provided with a slope of 1% -5%, and the water inlet end of the water outlet pipe is connected with the bottom of the drainage groove.

4. The siphonic aerobic granular sludge reactor according to claim 2,

and the water outlet end of the water outlet pipe is provided with a flow regulating valve.

5. The siphonic aerobic granular sludge reactor according to any one of claims 2 to 4,

the cross section of the box body is rectangular, and the cross section of the drainage cover is rectangular;

the length of the drainage cover is smaller than that of the box body, and gaps are reserved between two ends of the drainage cover in the length direction and the wall surface of the box body.

6. The siphonic aerobic granular sludge reactor according to claim 1,

the water inlet system comprises a water inlet pipe, a water distribution pipeline, a positive and negative flushing and emptying pipe and an exhaust pipe;

the water inlet pipe is positioned at the bottom of the box body and is connected with the water distribution pipeline in the box body;

the water distribution pipeline comprises a main water distribution pipe, branch water distribution pipes and bread water distribution pipes, the main water distribution pipe is connected with the water inlet pipe and is connected with the branch water distribution pipes, the branch water distribution pipes are arranged at intervals, and each branch water distribution pipe is provided with one bread water distribution pipe;

the forward and reverse flushing and emptying pipe is connected with the main water distribution pipe and is provided with a valve;

the air inlet end of the exhaust pipe is connected with each bread water distribution pipe and is close to the main water distribution pipe, and the exhaust end of the exhaust pipe is located outside the box body and is provided with a valve.

7. The siphonic aerobic granular sludge reactor according to claim 1,

the stirring system comprises a low-speed stirrer, the low-speed stirrer comprises a motor and a stirring impeller, the motor is fixed on the wall surface of the box body, and the stirring impeller is located in the box body and located between the sludge discharge system and the water inlet system.

8. The siphonic aerobic granular sludge reactor according to claim 1,

the aeration system comprises an aeration main pipe, aeration branch pipes, aeration discs and a water drain pipe;

the inlet of the main aeration pipe is positioned outside the box body and extends to the bottom of the box body from the top end of the box body along the inner wall of the box body, the outlet of the main aeration pipe is connected with a plurality of branch aeration pipes, the branch aeration pipes are arranged at intervals, and each branch aeration pipe is provided with a plurality of aeration discs; the water inlet of the water drain pipe is connected with the main aeration pipe and is positioned in the box body, and the water outlet of the water drain pipe is positioned above the liquid level of the reactor.

9. The siphonic aerobic granular sludge reactor according to claim 1,

the sludge discharge system comprises a residual sludge discharge pipe and an annular sludge discharge pipe, and the annular sludge discharge pipe is arranged in the box body and is positioned between the siphon water outlet system and the aeration system; the wall of the annular sludge discharge pipe is provided with a plurality of sludge discharge holes;

one end of the excess sludge discharge pipe is connected with the annular sludge discharge pipe, and the other end of the excess sludge discharge pipe is positioned outside the box body.

10. The siphonic aerobic granular sludge reactor according to claim 1,

the siphoning type aerobic granular sludge reactor further comprises a matching system, wherein the matching system comprises a ladder stand arranged on the outer wall of the box body and a liquid level meter arranged inside the box body.

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