CN216764443U - Circumferential-in and circumferential-out aerobic reaction tank for BFM-MBBR sewage treatment process - Google Patents
Circumferential-in and circumferential-out aerobic reaction tank for BFM-MBBR sewage treatment process Download PDFInfo
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- CN216764443U CN216764443U CN202220237052.0U CN202220237052U CN216764443U CN 216764443 U CN216764443 U CN 216764443U CN 202220237052 U CN202220237052 U CN 202220237052U CN 216764443 U CN216764443 U CN 216764443U
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a weekly-feeding and weekly-discharging aerobic reaction tank for a BFM-MBBR sewage treatment process, and relates to the technical field of sewage treatment equipment. The reaction tank comprises a reaction tank body, wherein the reaction tank body is cylindrical, a water inlet channel is arranged on the periphery of the top of the reaction tank body and is connected with a water inlet pipe, and the water inlet channel feeds water into the reaction tank body in a multi-point water feeding mode; the inner side of the water inlet channel is provided with a water collecting channel which is connected with a water outlet pipe, and water is discharged from the periphery of the reaction tank body through the water outlet pipe. A water inlet separation cavity is arranged below the water inlet channel, and a water inlet interception screen is arranged between the water inlet separation cavity and the reaction tank body; the reaction tank body is provided with a water outlet interception screen, the upper edge of the reaction tank body is as high as the reaction tank body, and the lower edge of the reaction tank body is as low as the water collecting channel. The reaction tank of the utility model does not need to be provided with a plug flow stirrer, has low investment and operation energy consumption and strong water impact resistance, and has high effluent quality standard based on good fluidization effect.
Description
Technical Field
The utility model relates to the technical field of sewage treatment equipment, in particular to a weekly-entering and weekly-exiting aerobic reaction tank for a BFM-MBBR sewage treatment process.
Background
In recent years, with the continuous increase of sewage treatment capacity and the continuous strictness of discharge standards in China, the requirements of new construction of sewage plants in land saving and standard improvement, capacity expansion and transformation of original pools are continuously increased. The Moving Bed Biofilm Reactor (MBBR) has the advantages of in-situ inlaying and high-efficiency intensive performance, and effectively solves the problem of land shortage in new construction and modification of sewage plants. The core difficulty of the application of the MBBR technology is to maintain good fluidization of the suspended carrier, and in order to achieve the purpose, the MBBR technology mainly starts to solve the problems in terms of MBBR pool type arrangement, equipment arrangement and the like in the prior art. In the traditional mode, plug flow stirring is additionally added on the basis of aeration of an aerobic zone, and although the problem of fluidization can be solved, the project investment and operation and maintenance cost are increased. So the core is to eliminate the impeller stirrer to solve the investment and the operation cost. CN213950724U discloses an aerobic moving bed biofilm reactor, which is characterized in that in equipment installation, although a plug flow stirrer is not added, aeration non-vertical blowing is carried out to replace the traditional plug flow stirrer, and the energy consumption of aeration is indirectly increased.
The fluidization of the suspended carrier in water is influenced by the flow velocity of water flow and the aeration air velocity, and because the water inflow in the traditional mode generally adopts single-point water inflow, the flow velocity of water flow is larger, the aeration air velocity is weakened, the aeration power is influenced, and the fluidization of the suspended carrier is influenced. Therefore, to achieve the same fluidization effect, the aeration rate needs to be increased, and the energy consumption is increased. In addition, the operation of a water plant is greatly influenced by seasonality, and particularly is easily impacted by the amount of inlet water in rainy seasons, the traditional water inlet mode is generally single-point water inlet, and the reactor is easily in a plug flow state under the instantaneous impact state of the amount of water, so that the risk that the treatment effect does not reach the standard exists.
It can be seen that the prior art is subject to further improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a peripheral inflow and outflow aerobic reaction tank for a BFM-MBBR sewage treatment process, which does not need to be provided with a plug flow stirrer, has low investment and operation energy consumption and strong water impact resistance, and is based on good fluidization effect and high effluent quality standard.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a circumference is advanced all around and is gone out aerobic reaction tank for BFM-MBBR sewage treatment process, including the reaction tank body, the shape of the said reaction tank body is a cylinder, there is an inlet channel in the periphery of the top of the said reaction tank body, the said inlet channel connects with the inlet tube, lead in water to the said inlet channel through the said inlet tube;
a water collecting channel is arranged on the inner side of the water inlet channel, the water collecting channel is connected with a water outlet pipe, and water in the reaction tank body is discharged through the water outlet pipe;
a water inlet separation cavity is arranged below the water inlet channel, and a water inlet interception screen is arranged between the water inlet separation cavity and the reaction tank body; the water inlet channel sequentially feeds water into the water inlet separation cavity and the reaction tank body in a multi-point water inlet mode;
the top end of the reaction tank body is provided with a water outlet interception screen, the whole water outlet interception screen is in a circular truncated cone shape, the upper edge of the water outlet interception screen is as high as the reaction tank body, and the lower edge of the water outlet interception screen is as low as the water collecting channel;
a suspended carrier is filled in the reaction tank body except the water inlet separate cavity;
an aeration pipe is arranged at the bottom of the reaction tank body.
In a preferred embodiment of the present invention, the specific gravity of the suspension vehicle is 0.94 to 0.97g/cm3The void ratio is not less than 90 percent,the filling rate is not higher than 67%.
In another preferred embodiment of the present invention, the water inlet intercepting screen is disposed near the bottom of the water inlet compartment and the reaction tank body.
Preferably, a plurality of through holes are uniformly distributed on the water inlet intercepting screen and the water outlet intercepting screen, the through holes are circular or square, the diameter of the circular through holes is smaller than that of the suspended carrier, and the side length of the square through holes is smaller than that of the suspended carrier.
Preferably, the bottom of the water inlet channel is uniformly provided with water inlet holes, and the water inlet channel uniformly distributes water into the water inlet separation cavity through the water inlet holes.
Preferably, the ratio of the height to the diameter of the reaction tank body is 1.0-1.5: 1.
Preferably, the height of the water inlet interception screen is 15-25% of the height of the reaction tank body.
Preferably, the ratio of the diameter of the circular through hole to the diameter of the suspension carrier is 0.70-0.85: 1, the ratio of the side length of the square through hole to the diameter of the suspension carrier is 0.50-0.70: 1.
compared with the prior art, the utility model has the following beneficial technical effects:
(1) the utility model provides a peripheral inlet and outlet aerobic reaction tank for a BFM-MBBR sewage treatment process, which realizes peripheral multi-point water inlet by arranging a reaction tank body into a cylinder and arranging a water inlet channel on the periphery of the reaction tank body, reduces the water inlet flow rate by increasing the water inlet section, weakens the influence of the water inlet flow rate on the air velocity, and further realizes uniform fluidization of a suspended carrier under normal aeration quantity.
(2) The reaction tank has a large water inlet section, and further has strong water impact resistance.
(3) The utility model does not need various plug flow stirrers and has low investment and operation energy consumption.
(4) Based on the good fluidization effect of the suspended carrier, the effluent quality standard of the reaction tank is high, and the effect of less than 0.5mg/L on ammonia nitrogen can be obtained.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a top view of a weekly aerobic reaction tank for BFM-MBBR sewage treatment process of the present invention;
FIG. 2 is a cross-sectional view of a weekly aerobic reaction tank for BFM-MBBR sewage treatment process of the present invention;
in the figure:
1-a reaction tank body, 2-a water inlet pipe, 3-a water inlet channel, 4-a water inlet hole, 5-a baffle, 6-an aeration pipe, 7-a suspension carrier, 8-a water outlet interception screen, 9-a water collecting channel, 10-a water outlet pipe, 11-a water inlet separation cavity and 12-a water inlet interception screen.
Detailed Description
The utility model provides a cycle-in and cycle-out aerobic reaction tank for a BFM-MBBR sewage treatment process, and in order to make the advantages and technical scheme of the utility model clearer and clearer, the utility model is described in detail by combining specific embodiments.
Referring to fig. 1 and 2, the aerobic reaction tank for the BFM-MBBR sewage treatment process comprises a reaction tank body 1, and unlike the prior art, the reaction tank body 1 is designed as a cylinder, and the cylinder is hollow, i.e., the reaction is performed inside the cylinder. Specifically, with reaction tank body complex inlet channel 3, it is located the periphery at reaction tank body top, is equivalent to, and the inner wall at reaction tank body top is around a week, promptly the inlet channel, and the inlet channel is through the inlet tube 2 rather than being connected to wherein intaking, and the inlet opening 4 of inlet channel bottom is intake to intaking in proper order and separate chamber, the reaction tank body.
Because the water inlet channel is matched with the cylindrical reaction tank body, the shape of the reaction tank body is also circular, so that peripheral water inlet can be realized, namely the mode of single-point water inlet in the prior art is changed, and the purpose of multipoint water inlet is as follows: can ensure that the cross section of the water flow is large, the flow velocity of the cross section is low, the water impact resistance is excellent, and the influence of the flow velocity of the water flow on the aeration gas velocity is small. In addition, the water collecting channel positioned on the inner side of the water inlet channel is connected with a water outlet pipe, and water in the reaction tank body is discharged through the water outlet pipe, so that peripheral water outlet is realized.
The inner side of the water inlet channel is provided with a water collecting channel 9 which is connected with a water outlet pipe 10, and the water in the reaction tank body is discharged through the water outlet pipe.
A water inlet separation cavity 11 is arranged below the water inlet channel, the water inlet separation cavity 11 is separated from the reactor body through a baffle 5, water entering through a water inlet hole in the bottom of the water inlet channel firstly enters the water inlet separation cavity, water uniformly enters the reaction tank body through the water inlet separation cavity, and a water inlet interception screen 12 is arranged between the water inlet separation cavity and the reaction tank body; equivalently, the water inlet interception screen 12 is positioned at the bottom of the reaction tank body, a plurality of through holes are uniformly distributed on the water inlet interception screen, the through holes can be circular or square, and when the through holes are circular, the diameter of each through hole is smaller than that of the suspension carrier; when the through holes are square, the side length of each through hole is smaller than the diameter of the suspended carrier, so that the suspended carrier is prevented from being washed out, and preferably, the water inlet interception screen 12 and the baffle 5 share one wall.
The top end of the reaction tank body is provided with a water outlet interception screen mesh 8 which is integrally in a round platform shape, the upper edge of the water outlet interception screen mesh is as high as the reaction tank body, and the lower edge of the water outlet interception screen mesh is as low as the water collecting channel. A plurality of through holes are uniformly distributed on the water outlet interception sieve screen, the shape of each through hole can be circular or square, and when the through holes are circular, the diameter of each through hole is smaller than that of the suspension carrier; when the through holes are square, the side length of each through hole is smaller than the diameter of the suspension carrier, so that the suspension carrier is prevented from being punched out.
The reaction tank body except the water inlet separation cavity is filled with a suspension carrier 7, and the bottom of the reaction tank body is provided with an aeration pipe 6. The structure of the aeration pipe is the same as that of the prior art, and the detailed description is omitted here.
Preferably, the specific gravity of the suspension carrier is 0.94-0.97 g/cm3The void ratio is not less than 90 percent, and the filling ratio is not more than 67 percent.
Preferably, the ratio of the height to the diameter of the reaction tank body is 1.0-1.5: 1, and the limit of the ratio of the height to the diameter of the reaction tank body is selected according to practical use, and the limit aims to avoid the problem of short flow.
Preferably, the height of the water inlet interception screen is 15-25% of the height of the reaction tank body.
Preferably, the ratio of the diameter of the circular through hole to the diameter of the suspension carrier is 0.70-0.85: 1, the ratio of the side length of the square through hole to the diameter of the suspension carrier is 0.50-0.70: 1.
the operation method of the aerobic reaction tank for the BFM-MBBR sewage treatment process is described in detail below.
The method specifically comprises the following steps:
firstly, introducing water to be treated into a water inlet channel through a water inlet pipe;
secondly, water in the water inlet channel enters the water inlet separate cavity through the water inlet hole;
thirdly, water is fed into the reaction tank body from the water inlet separate cavity through the water inlet intercepting screen;
fourthly, in the reaction tank body, the fluidization of the suspended carrier is realized through the aeration effect, and the removal of pollutants is completed at the same time;
fifthly, the sewage enters the water collecting channel through the water outlet interception screen mesh, and the suspension carrier is blocked outside the water outlet interception screen mesh;
and sixthly, discharging the sewage out of the reaction tank body through a water outlet pipe.
In conclusion, the peripheral-inlet and peripheral-outlet aerobic reaction tank for the BFM-MBBR sewage treatment process has the advantages of large water inlet section, low water passing flow rate and high water impact resistance of the reaction tank, and the reaction tank body is cylindrical and discharges water along the periphery of the peripheral inlet water; and the flow velocity of the water passing is small, the influence on the gas velocity is small, and the fluidization of the suspended carrier is more uniform.
Parts which are not described in the utility model can be realized by adopting or referring to the prior art.
Although terms such as reaction cell body 1, inlet conduit 2, inlet channel 3, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
It is further understood that the specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (8)
1. A week advances all around and goes out aerobic reaction pond for BFM-MBBR sewage treatment process, includes the reaction tank body, its characterized in that: the reaction tank body is cylindrical, a water inlet channel is arranged on the periphery of the top of the reaction tank body, the water inlet channel is connected with a water inlet pipe, and water is introduced into the water inlet channel through the water inlet pipe;
a water collecting channel is arranged on the inner side of the water inlet channel, the water collecting channel is connected with a water outlet pipe, and water in the reaction tank body is discharged through the water outlet pipe;
a water inlet separation cavity is arranged below the water inlet channel, and a water inlet interception screen is arranged between the water inlet separation cavity and the reaction tank body; the water inlet channel sequentially feeds water into the water inlet separation cavity and the reaction tank body in a multi-point water inlet mode;
the top end of the reaction tank body is provided with a water outlet interception screen, the whole water outlet interception screen is in a circular truncated cone shape, the upper edge of the water outlet interception screen is as high as the reaction tank body, and the lower edge of the water outlet interception screen is as low as the water collecting channel;
a suspended carrier is filled in the reaction tank body except the water inlet separate cavity;
an aeration pipe is arranged at the bottom of the reaction tank body.
2. The aerobic reaction tank for the BFM-MBBR sewage treatment process, according to claim 1, is characterized in that: the specific gravity of the suspension carrier is 0.94-0.97 g/cm3The void ratio is not less than 90 percent, and the filling ratio is not more than 67 percent.
3. The aerobic reaction tank for the BFM-MBBR sewage treatment process, according to claim 1, is characterized in that: the water inlet interception screen is arranged at the bottom of the reaction tank body close to the water inlet separation cavity.
4. The aerobic weekly-feeding and weekly-discharging reaction tank for BFM-MBBR sewage treatment process according to claim 3, wherein: a plurality of through holes are uniformly distributed on the water inlet intercepting screen and the water outlet intercepting screen, the through holes are circular or square, the diameter of each circular through hole is smaller than that of the suspension carrier, and the side length of each square through hole is smaller than that of the suspension carrier.
5. The aerobic reaction tank for the BFM-MBBR sewage treatment process, according to claim 1, is characterized in that: the bottom of the water inlet channel is uniformly provided with water inlet holes, and the water inlet channel uniformly distributes water into the water inlet separation cavity through the water inlet holes.
6. The aerobic reaction tank for the BFM-MBBR sewage treatment process, according to claim 1, is characterized in that: the ratio of the height to the diameter of the reaction tank body is 1.0-1.5: 1.
7. The aerobic weekly-feeding and weekly-discharging reaction tank for BFM-MBBR sewage treatment process according to claim 3, wherein: the height of the water inlet interception screen is 15-25% of the height of the reaction tank body.
8. The aerobic reaction tank for the BFM-MBBR sewage treatment process according to claim 4, wherein: the ratio of the diameter of the circular through hole to the diameter of the suspension carrier is 0.70-0.85: 1, the ratio of the side length of the square through hole to the diameter of the suspension carrier is 0.50-0.70: 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220237052.0U CN216764443U (en) | 2022-01-28 | 2022-01-28 | Circumferential-in and circumferential-out aerobic reaction tank for BFM-MBBR sewage treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220237052.0U CN216764443U (en) | 2022-01-28 | 2022-01-28 | Circumferential-in and circumferential-out aerobic reaction tank for BFM-MBBR sewage treatment process |
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| Publication Number | Publication Date |
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| CN216764443U true CN216764443U (en) | 2022-06-17 |
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| CN202220237052.0U Active CN216764443U (en) | 2022-01-28 | 2022-01-28 | Circumferential-in and circumferential-out aerobic reaction tank for BFM-MBBR sewage treatment process |
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| CN (1) | CN216764443U (en) |
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- 2022-01-28 CN CN202220237052.0U patent/CN216764443U/en active Active
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