CN217947771U - Novel siphon decanter and SBR reactor - Google Patents

Abstract

The invention discloses a novel siphon decanter and an SBR reactor, comprising an annular space drainage channel, a conical surface converging chamber, a gas valve, a U-shaped pipe and a drainage pipe. The annular space drainage channel comprises an inner cylinder and an outer cylinder, an annular drainage space is formed by the inner cylinder and the outer cylinder, and the top of the annular space drainage channel is connected with the confluence weir; the conical surface confluence chamber comprises a circular confluence weir and a conical structure, the periphery of the circular confluence weir is connected with the inner cylinder, and the bottom of the conical structure is connected with the outer cylinder; the air valve is connected with the top of the conical structure through a vent pipe; one end of the U-shaped pipe is connected with the bottom of the center of the circular confluence weir, and the other end of the U-shaped pipe is connected with the drain pipe. The water decanter has the advantages of small volume, light weight, convenient field installation, uniform and stable water decanting process, and the water decanter is always kept in a horizontal state, so that the activated sludge and sewage which is not biochemically treated cannot flow out of the circular confluence weir in the whole process to influence the quality of effluent water.

Description

Novel siphon decanter and SBR reactor

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a novel hydrocone type decanter and SBR reactor.

Background

The SBR process, which is called sequencing batch activated sludge process, is the initial mode of biological sewage treatment process, and has limited application and development due to complicated water inlet and outlet switching and water level and equipment changing. With the development and application of computer and automatic control technology and related equipment, the SBR method is widely applied to domestic sewage treatment and various organic industrial wastewater treatments. The SBR process is different from the traditional activated sludge process, has the characteristic of space plug flow in the aspects of flow state and organic matter degradation, is a complete mixing type in the flow state, degrades organic matters along with the time in the aspect of organic matter degradation, has stable and reliable treatment effect, and is undoubtedly an ideal process with small occupied area, less investment, low energy consumption and high efficiency particularly for the sewage treatment with small water amount.

The drainage mode of a single reactor in the SBR process is operated in a static precipitation, centralized water decanting or drainage mode, and because the centralized water decanting time is short, the water decanting flow rate is large each time, so that the active sludge of the reactor is not disturbed in a state of large amount of water in a short time, and a special drainage device, namely a water decanter, is required to be installed. In particular, its performance should meet several requirements:

1. the settled sludge is not disturbed, the sludge is not floated upwards, and the water is drained regularly and quantitatively.

2. Anti-scum measures should be taken to prevent scum and foam from flowing out.

3. In the aeration reaction process, the activated sludge and the sewage which is not biochemically treated can not enter a drain pipe of the decanter, so that the quality of the effluent is influenced.

Decanters used in SBR biochemical reactors can be classified into five types: the first type is an electric mechanical rocker arm type decanter, the second type is a sleeve type decanter, the third type is a siphon type decanter, the fourth type is a rotary type decanter, and the fifth type is a float type decanter, wherein the first, the fourth and the fifth types are powered type decanters which are easy to malfunction in use and have higher manufacturing cost because rotating pieces are arranged and need mechanical transmission; the second sleeve type decanter is easy to cause the phenomenon that the pipe sleeve is blocked and can not work normally; the third type of siphon decanter is developed by Australian AAT company in the middle of the 20 th century and the 80 th century and is applied to the SBR process, and is mainly divided into 3 parts, namely a plurality of short drainage pipes, a horizontal weir arm, a U-shaped pipe part and a main drainage pipe, so that the siphon decanter has the advantages of convenience in maintenance, low operation cost and capital construction cost saving, but has high processing precision, adopts a multi-pipe multi-point water inlet mode, and has the defects that the flow of each water inlet is uneven, the water volume close to a main pipe and a water outlet pipe is large, and the water volume is small on the contrary because of different pipeline resistances; in addition, the water inlets are distributed at multiple points on the horizontal plane, the decanter occupies larger space, is high in installation difficulty, is not beneficial to the maintenance of an aeration system at the bottom of the reactor, is less in application in China and is in need of improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a novel siphon decanter and SBR reactor, the decanter has small volume, light weight, convenient field installation, uniform and stable decanting process, and the decanter keeps a horizontal state all the time, thereby improving the stability of the decanting process, and activated sludge and sewage which is not biochemically treated can not enter the decanter in the whole process so as to influence the quality of effluent water.

In order to realize the purpose of the utility model, the following scheme is planned to be adopted:

a novel siphon decanter comprises an annular space drainage channel, a conical surface converging chamber, an air valve, a U-shaped pipe and a drainage pipe.

The annular space drainage channel is vertically arranged and comprises an inner cylinder and an outer cylinder, an annular drainage space is formed by the inner cylinder and the outer cylinder, and the top of the annular space drainage channel is connected with the conical surface confluence chamber;

the conical surface confluence chamber comprises a circular confluence weir and a conical structure positioned at the top of the circular confluence weir, the periphery of the circular confluence weir is connected with the inner cylinder, and the bottom of the conical structure is connected with the outer cylinder;

the air valve is connected with the top of the conical structure through the vent pipe and used for controlling the opening and closing of the vent pipe;

the round weir center bottom that converges is connected to U type pipe one end, and the drain pipe is connected to the other end, and the U type pipe is equipped with the overflow pipe with the junction of drain pipe, and the overflow pipe is used for communicating with each other with the atmosphere and gives U type pipe water injection.

Furthermore, a plurality of connecting strips are arranged between the inner barrel and the outer barrel and used for controlling the concentricity of the inner barrel and the outer barrel.

Furthermore, the conical confluence chamber is provided with an exhaust pipe which penetrates through the circular confluence weir and the conical structure, and the exhaust pipe is used for discharging gas which is aerated and gathered on the inner side of the inner cylinder so as to reduce the buoyancy of the siphon decanter and enhance the stability.

Furthermore, the drain pipe is positioned below 6cm to 9cm of the bottom of the annular space drain channel.

Furthermore, the top of the vent pipe is provided with a horizontal adjusting mechanism, the horizontal adjusting mechanism comprises an adjusting plate, the adjusting plate is connected with the decanter mounting plate through a rotatable adjusting column with threads, the rotatable adjusting column at least comprises three rotatable adjusting columns, and the water inlet of the annular space drainage channel is adjusted to be horizontal through adjusting the rotatable adjusting column.

The top of the adjusting plate is provided with a top cone, and the top of the top cone is tightly attached to the decanter mounting plate.

The utility model provides a novel SBR reactor, includes central controller, SBR reaction tank and is located the aforesaid in the SBR reaction tank novel hydrocone type decanter, level sensor, aeration equipment, level sensor is used for gathering the information of basin level line in the SBR reaction tank to with information transmission to central controller, central controller is used for receiving level sensor's information, and with the information and the default contrast of above-mentioned basin level line, when the basin level line reaches corresponding default, opening and close of central controller control air valve.

Further, the liquid level sensor is arranged as a drop-in liquid level meter.

The beneficial effects of the utility model reside in that:

1. the decanter in the prior art adopts a plurality of short pipes to decant water respectively, the drainage is uneven, the structure is more complicated, the utility model is arranged into an annular gap drainage channel consisting of an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are concentrically arranged, the equal resistance drainage and the drainage are even, the weir mouth load of a confluence weir is small, no disturbance is caused to a mud layer, and the higher decanting height is realized; the decanter in the prior art has moving parts, can not realize higher decanting depth in a small space, has compact structure and small volume, is particularly suitable for small-sized sewage treatment, has light weight and no movable part, and brings great convenience to transportation and field installation;

2. the top of the conical surface converging chamber is provided with a conical structure, sludge can slide down from the inclined surface of the conical surface converging chamber in the precipitation stage, so that sludge accumulation in the precipitation stage is avoided, and the conical surface converging chamber is provided with an exhaust pipe penetrating through the circular converging weir and the conical structure, so that gas accumulated on the inner side of the inner cylinder due to aeration can be discharged through the exhaust pipe, the buoyancy of the siphon decanter is reduced, and the stability is enhanced;

3. the middle vent pipe of the utility model has the functions of an air discharge channel and the function of mounting and supporting; the decanter in the prior art has the problem of instability because the buoy or the air bag floats in water, and the top of the vent pipe is connected with the horizontal adjusting mechanism, so that the decanter has higher stability;

4. the opening and closing control of the air valve is used for completing all processes of water inlet, aeration, sedimentation and water decanting of the SBR reaction tank, the air valve is set to be a normally closed electric or pneumatic valve, in each operation period, the air valve only has two short opening actions, even if power failure occurs suddenly in the operation process, sewage can not be discharged out of the SBR reaction tank, the operation is stable and reliable, the air valve is not in contact with a liquid medium, only in contact with air, and the SBR reaction tank is durable.

Drawings

FIG. 1 is a structural diagram of a decanter according to an embodiment of the present invention;

FIG. 2 is a partial enlarged view of A in FIG. 1;

FIG. 3 is a connection structure diagram of the adjusting plate and the decanter mounting plate according to the embodiment of the present invention;

FIG. 4 is a structural diagram of a connecting strip according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the SBR reactor according to the embodiment of the present invention.

Detailed Description

Example 1

As shown in fig. 1 to 4, the present embodiment provides a novel siphon decanter, which includes an annular gap drainage channel 9, a conical surface converging chamber 5, a gas valve 3, a U-shaped pipe 16, and a drainage pipe 10.

Specifically, the annular space drainage channel 9 is vertically arranged, the annular space drainage channel 9 comprises an inner cylinder 91 and an outer cylinder 92, the inner cylinder 91 and the outer cylinder 92 form an annular drainage space, and the annular space drainage channel has the effects of draining water with equal resistance, enabling the annular space drainage channel 9 to uniformly feed water along the circumference and preventing mud sedimentation through stirring.

More specifically, a plurality of connecting strips 93 are further arranged between the inner cylinder 91 and the outer cylinder 92, and the connecting strips 93 are used for controlling the concentricity of the inner cylinder 91 and the outer cylinder 92 and can also play a supporting role, so that the stability of the inner cylinder 91 and the outer cylinder 92 is improved.

Specifically, the top of the annular gap drainage channel 9 is connected with the conical surface converging chamber 5, the conical surface converging chamber 5 comprises a circular converging weir 51 and a conical structure 52 positioned at the top of the circular converging weir 51, the periphery of the circular converging weir 51 is connected with the inner cylinder 91, the bottom of the conical structure 52 is connected with the outer cylinder 92, and sludge can slide down from the inclined surface of the conical structure 52 in the aeration stage and the sedimentation stage, so that sludge accumulation is avoided.

More specifically, the conical surface converging chamber 5 is provided with the vent pipe 6 penetrating through the circular converging weir 51 and the conical structure 52, and the vent pipe 6 can discharge the gas gathered at the inner side of the inner cylinder 91 due to aeration, so that the buoyancy of the siphon decanter is reduced, and the stability is enhanced.

Specifically, the air valve 3 is set as a normally closed electric or pneumatic valve, the air valve 3 is connected with the top of the conical structure 52 through the vent pipe 31, the air valve 3 is used for controlling the opening and closing of the vent pipe 31, and the vent pipe 31 has the functions of an air release channel and installation and support.

More specifically, the top of the vent pipe 31 is provided with a horizontal adjusting mechanism, the horizontal adjusting mechanism comprises an adjusting plate 2, the adjusting plate 2 is connected to the decanter mounting plate through a rotatable adjusting column 21 with threads, in the embodiment, the rotatable adjusting column 21 is provided with bolts, the adjusting plate 2 is connected to the decanter mounting plate 1 through three bolts, and the three bolts are uniformly distributed.

More specifically, the top of the adjusting plate 2 is provided with a tip cone 22, the tip cone 22 is set to be circular or obtuse angle, the top of the tip cone 22 props against the decanter mounting plate 1, the water inlet of the annular gap drainage channel 9 is always kept in a horizontal state by adjusting three bolts, and the stability of the decanting process is improved.

Specifically, one end of the U-shaped pipe 16 is connected with the bottom of the center of the circular confluence weir 51, the other end of the U-shaped pipe is connected with the water discharge pipe 10, the water discharge pipe 10 is located 10cm below the lowest water level 14, an overflow pipe 4 is arranged at the joint of the U-shaped pipe 16 and the water discharge pipe 10, the overflow pipe 4 is arranged higher than the highest water level 12, and the overflow pipe 4 is used for communicating with the atmosphere and injecting water into the U-shaped pipe 16.

Example 2

As shown in fig. 5, the novel SBR reactor provided in this embodiment includes a central controller, an SBR reaction tank, and the novel siphon decanter, the liquid level sensor 15, and the aeration device 17 described in embodiment 1 located in the SBR reaction tank, wherein the liquid level sensor 15 is configured to collect information of a water level line in the SBR reaction tank and transmit the information to the central controller, the central controller is configured to receive the information of the liquid level sensor 15 and compare the information of the water level line with a preset value, and when the water level line reaches the corresponding preset value, the central controller controls the opening and closing of the air valve 3.

Preferably, the level sensor 15 is provided as a drop-in level gauge.

When the device is installed, the top cone 22 is firstly used for propping against the decanter installation plate 1, and the water inlet of the annular space drainage channel 9 is adjusted to be horizontal by adjusting three bolts, and the control method of the embodiment comprises the following steps:

s1, an idle stage, namely a waiting state after the drainage of the previous period is finished before the sewage begins to flow in, namely a lowest water level line 14, wherein the air valve 3 is in a closed state, and when the device is used for the first time, water is firstly injected into the U-shaped pipe 16 through the overflow pipe 4 until redundant water flows out of the drainage pipe 10;

s2, in a water inlet stage, closing the air valve 3, injecting sewage to be treated into the SBR reactor through the water inlet pipe 11, collecting information of a water level line by the liquid level sensor 15 from a lowest water level line 14 to a highest water level line 12, transmitting the information to the central controller, and stopping water injection of the water inlet pipe 11;

s3, in the aeration stage, the air valve 3 is kept in a closed state, aeration is carried out on the water through the aeration device 17, and after the aeration reaches the set time, the central controller automatically closes the aeration device 17 and stops aeration;

s4, in a sedimentation stage, the air valve 3 is kept closed continuously, the activated sludge begins to sink, after sedimentation time is over, supernatant liquid after solid-liquid separation is obtained on the upper portion of the SBR reaction tank, in a water injection process, liquid in the U-shaped pipe 16 plays a steam seal role due to the fact that the air valve 3 is closed, a steam seal space is formed, along with the fact that the liquid level in the tank rises continuously, the water level in the annular space drainage channel 9 rises under the static pressure of water, due to the fact that air in the sealed space is pushed, the liquid levels at two ends of the U-shaped pipe 16 change, the liquid level at the end close to the annular space drainage channel 9 falls, the liquid level at the end leading to the drainage pipe 10 rises, and surplus water flows away along the drainage pipe 10, due to the existence of the U-shaped pipe 16, the pressure of the air caused by the rising of the liquid level of the annular space drainage channel 9 is balanced by the water level difference caused by the U-shaped pipe 16, and therefore water in the SBR reaction tank cannot flow into the annular space drainage channel 9 continuously, and the purpose that sewage and the activated sludge cannot enter the annular space drainage channel 9 in the whole, the sedimentation process of aeration and sedimentation process is achieved successfully;

s5, in a decanting stage, the central controller opens the air valve 3, air in the steam seal space is partially discharged, supernatant enters the annular space drainage channel 9 to begin decanting, and water flows sequentially pass through the circular confluence weir 51, the U-shaped pipe 16 and the drainage pipe 10; when the water level is reduced to the top of the conical structure 52, the air valve 3 is closed, the siphon state is established, and the water decanting is continued; when the water level is lowered to be within 1cm to 4cm above the water inlet of the annular gap drainage channel 9, namely the lowest water level line, the liquid level sensor 15 transmits the water level line information to the central controller, the air valve 3 is opened, the siphon state is broken, and the decanting is stopped.

In conclusion, compared with the decanter in the prior art, the decanter of the utility model has the advantages of small volume, light weight and no movable part, brings great convenience for transportation and field installation, is particularly suitable for small-sized sewage treatment, and greatly improves the decanting height.

The above embodiments are only used for illustrating the technical ideas and features of the present invention, and do not represent the only or limiting of the present invention. It should be understood by those skilled in the art that various changes and equivalent substitutions made herein may be made without departing from the scope of the invention as defined by the appended claims.

Claims (8)

1. A novel siphon decanter is characterized by comprising an annular space drainage channel (9), a conical surface converging chamber (5), an air valve (3), a U-shaped pipe (16) and a drainage pipe (10);

the annular space drainage channel (9) is vertically arranged, the annular space drainage channel (9) comprises an inner cylinder (91) and an outer cylinder (92), the inner cylinder (91) and the outer cylinder (92) form an annular drainage space, and the top of the annular space drainage channel (9) is connected with the conical surface confluence chamber (5);

the conical surface converging chamber (5) comprises a circular converging weir (51) and a conical structure (52) positioned at the top of the circular converging weir (51), the periphery of the circular converging weir (51) is connected with an inner cylinder (91), and the bottom of the conical structure (52) is connected with an outer cylinder (92);

the air valve (3) is connected with the top of the conical structure (52) through the vent pipe (31), and the air valve (3) is used for controlling the opening and closing of the vent pipe (31);

one end of the U-shaped pipe (16) is connected with the central bottom of the circular confluence weir (51), the other end of the U-shaped pipe is connected with the drain pipe (10), an overflow pipe (4) is arranged at the joint of the U-shaped pipe (16) and the drain pipe (10), and the overflow pipe (4) is used for communicating with the atmosphere and injecting water into the U-shaped pipe (16).

2. The new siphonic decanter according to claim 1, wherein a plurality of connecting strips (93) are provided between the inner barrel (91) and the outer barrel (92), the connecting strips (93) being adapted to control the concentricity of the inner barrel (91) and the outer barrel (92).

3. The novel siphon decanter of claim 1, wherein the conical collection chamber (5) is provided with an exhaust pipe (6) penetrating the circular collection weir (51) and the conical structure (52), the exhaust pipe (6) being used for discharging the gas accumulated inside the inner cylinder (91) by aeration to reduce the buoyancy of the siphon decanter and enhance the stability.

4. A novel siphonic decanter according to claim 1, characterized in that the drain pipe (10) is located at the bottom of the annular drain channel (9) under 6cm to 9 cm.

5. The novel siphonic decanter according to any one of claims 1 to 4, wherein a horizontal adjusting mechanism is arranged at the top of the vent pipe (31), the horizontal adjusting mechanism comprises an adjusting plate (2), the adjusting plate (2) is connected to the decanter mounting plate (1) through a rotatable adjusting column (21) with threads, the number of the rotatable adjusting column (21) is at least three, and the water inlet of the annular drainage channel (9) is adjusted to be horizontal through adjusting the rotatable adjusting column (21).

6. The new siphonic decanter according to claim 5, wherein the adjusting plate (2) is provided at its top with a top cone (22), the top of the top cone (22) abutting against the decanter mounting plate (1).

7. A novel SBR reactor, which is characterized by comprising a central controller, an SBR reaction tank, the novel siphon decanter as claimed in claim 6 positioned in the SBR reaction tank, a liquid level sensor (15) and an aeration device (17), wherein the liquid level sensor (15) is used for collecting information of a water level line in the SBR reaction tank and transmitting the information to the central controller, the central controller is used for receiving the information of the liquid level sensor (15) and comparing the information of the water level line with a preset value, and when the water level line reaches the corresponding preset value, the central controller controls the opening and closing of an air valve (3).

8. A novel SBR reactor according to claim 7, wherein the level sensor (15) is arranged as a drop-in level gauge.

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