CN215517104U - Sludge reflux control system based on sludge age - Google Patents
Sludge reflux control system based on sludge age Download PDFInfo
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- CN215517104U CN215517104U CN202122405273.2U CN202122405273U CN215517104U CN 215517104 U CN215517104 U CN 215517104U CN 202122405273 U CN202122405273 U CN 202122405273U CN 215517104 U CN215517104 U CN 215517104U
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Abstract
The utility model relates to a sludge reflux control system based on sludge age, and belongs to the technical field of sewage treatment. It includes: the system comprises a water inlet flowmeter, a sludge flowmeter, a first concentration meter, a second concentration meter, a data transmission module, a cloud platform, an execution module, a sludge reflux pump and a water outlet turbidimeter; the water inlet flowmeter is arranged on a water inlet pipe of the biochemical pool; the sludge flowmeter is arranged on the sludge return pipeline; the first concentration meter is arranged in the biochemical pool; the second concentration meter is arranged in a sludge hopper of the secondary sedimentation tank; the sludge reflux pump is arranged on the sludge reflux pipeline and is positioned between the secondary sedimentation tank and the sludge flowmeter; the effluent turbidimeter is arranged on the drain pipe; the data transmission module collects instrument data and uploads the instrument data to the cloud platform, the cloud platform transmits instructions to the execution module after calculation and analysis, and the execution module controls the sludge reflux pump. The utility model has the effects of saving power consumption, reducing cost, controlling the sludge reflux amount according to the sludge age, controlling data and keeping the biochemical system efficient and stable.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a sludge reflux control system based on sludge age.
Background
At present, the sludge backflow is an important control mode for maintaining the stability of a system in municipal sewage treatment, can ensure the concentration of sludge required in a reactor, maintains the dynamic balance of the sludge amount between a secondary sedimentation tank and the reactor, and has important influences on the effluent quality of a sewage treatment plant, the stable operation of the system and the operation cost. There is no specific way to control the sludge reflux amount, and most sewage treatment plants still adopt the traditional constant sludge reflux ratio or sludge reflux amount control.
Domestic sewage treatment discharge standard is constantly improved, especially to nitrogen phosphorus and other rich nutrient's emission control stricter, and sufficient sludge age can't be guaranteed to traditional mud backward flow control mode, just can't guarantee that denitrogenation efficiency and quality of water are up to standard.
The design of a sewage treatment plant generally adopts a sludge conforming method, and needs a relatively stable water quality condition of inlet water; the actual inflow water quality is unstable, the seasonal variation of the inflow is large, the fluctuation of the inflow per day and per hour is large, and the process control parameters need to be dynamically adjusted in the operation. The sewage plant adopts a control mode of fixed reflux ratio or reflux quantity, which can increase the hydraulic fluctuation of the secondary sedimentation tank and influence the mud-water separation process. When the sludge level of the secondary sedimentation tank is close to the effluent weir, a large amount of sludge can be lost, so that the effluent quality is seriously influenced; when the sludge is expanded, the sludge can be lost due to the small hydraulic fluctuation of the secondary sedimentation tank.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the utility model provides a sludge return control system based on sludge age.
The sludge reflux control system based on the sludge age adopts the following technical scheme: a sludge age-based sludge return control system comprises: the system comprises a water inlet flowmeter, a sludge flowmeter, a first concentration meter, a second concentration meter, a data transmission module, a cloud platform, an execution module, a sludge reflux pump and a water outlet turbidimeter; the water inlet flowmeter is arranged on a water inlet pipe of the biochemical pool; the sludge flowmeter is arranged on the sludge return pipeline; the first concentration meter is arranged in the biochemical pool; the second concentration meter is arranged in a sludge hopper of the secondary sedimentation tank; the sludge reflux pump is arranged on the sludge reflux pipeline and is positioned between the secondary sedimentation tank and the sludge flowmeter; the effluent turbidimeter is arranged on the drain pipe; the outlet of the biochemical tank is connected with the inlet of the secondary sedimentation tank; the outlet of the sludge return pipeline is connected with the water inlet pipe of the biochemical tank, and the inlet of the sludge return pipeline is connected with the bottom of the secondary sedimentation tank; the water discharge pipe is connected with an outlet of the secondary sedimentation tank; the water inlet flow meter, the sludge flow meter, the first concentration meter, the second concentration meter and the effluent turbidity meter are all connected with the input end of the data transmission module, the output end of the data transmission module is connected with the input end of the cloud platform, the output end of the cloud platform is connected with the input end of the execution module, and the execution module controls the sludge reflux pump through signals.
By adopting the technical scheme, the sludge backflow is controlled based on the sludge age, the fluctuation of hydraulic load of the secondary sedimentation tank caused by the traditional sludge backflow control is avoided, the sludge loss is avoided, the high efficiency and stability of a biochemical system are kept, the water quality safety of discharged water is ensured, and the data systematization can be realized by uploading the data to a cloud platform to realize remote and mobile terminal data monitoring.
Preferably, the system also comprises a regulating valve, wherein the regulating valve is arranged on the sludge return pipeline and is positioned between the secondary sedimentation tank and the sludge flowmeter, and the regulating valve is controlled by signals of the execution module. The execution module controls the opening of the valve of the regulating valve and regulates the sludge reflux amount.
Preferably, the system also comprises an excess sludge discharge pump, wherein the excess sludge discharge pump is arranged on a sludge discharge pipeline, and the sludge discharge pipeline is connected to the bottom of the secondary sedimentation tank.
Preferably, the first concentration meter is arranged at a distance of 1m from the bottom of the biochemical pool.
In summary, the utility model has the following beneficial technical effects:
1. according to the water outlet requirement, the data transmission module transmits data acquired by the water inlet flowmeter, the sludge flowmeter, the first concentration meter, the second concentration meter and the water outlet turbidity meter to the cloud platform, the cloud platform performs analysis and operation based on the definition of sludge age, and dynamically controls the operation parameters related to sludge, so that the fluctuation of hydraulic load of a secondary sedimentation tank caused by the traditional sludge backflow control is avoided, the sludge loss is avoided, the high efficiency and stability of a biochemical system are kept, and the water quality safety of outlet water is ensured;
2. the system is in closed-loop control, reduces the experience of manual control, performs analysis and calculation by depending on a cloud platform, controls the adjusting valve and the sludge reflux pump by the execution module to adjust the sludge reflux amount, reduces the labor intensity and improves the treatment efficiency; and the data is systematized, can be uploaded to a cloud platform for storage and analysis, and can realize remote and mobile terminal data monitoring.
Drawings
FIG. 1 is a schematic of the present invention.
Description of reference numerals: 1. a water inlet flow meter; 2. a sludge flow meter; 3. a first concentration meter; 4. a second concentration meter; 5. a biochemical pool; 6. a secondary sedimentation tank; 61. a sludge return line; 62. a sludge discharge pipe; 7. a data transmission module; 8. a cloud platform; 9. an execution module; 10. adjusting a valve; 11. a sludge reflux pump; 12. a surplus sludge discharge pump; 13. a turbidity meter of the effluent; 14. and a water discharge pipe.
Detailed Description
The present invention is described in further detail below with reference to fig. 1.
The embodiment of the utility model discloses a sludge reflux control system based on sludge age. Referring to fig. 1, a sludge-age-based sludge backflow control system comprises a water inlet flowmeter 1, a sludge flowmeter 2, a first concentration meter 3, a second concentration meter 4, a data transmission module 7, a cloud platform 8, an execution module 9, a sludge backflow pump 11 and a water outlet turbidity meter 13; the water inlet flowmeter 1 is arranged on a water inlet pipe of the biochemical pool 5; the sludge flowmeter 2 is arranged on the sludge return pipeline 61; the first concentration meter 3 is arranged in the biochemical pool 5; the second concentration meter 4 is arranged in a sludge hopper of the secondary sedimentation tank 6; the sludge reflux pump 11 is arranged on the sludge reflux pipeline 61 and is positioned between the secondary sedimentation tank 6 and the sludge flowmeter 2; the effluent turbidimeter 13 is arranged on a drain pipe 14; the outlet of the biochemical tank 5 is connected with the inlet of the secondary sedimentation tank 6; the outlet of the sludge return pipeline 61 is connected with the water inlet pipe of the biochemical tank 5, and the inlet is connected with the bottom of the secondary sedimentation tank 6; the water discharge pipe 14 is connected with the outlet of the secondary sedimentation tank 6; the water inlet flowmeter 1, the sludge flowmeter 2, the first concentration meter 3, the second concentration meter 4 and the water outlet turbidimeter 13 are connected with the input end of the data transmission module 7, the output end of the data transmission module 7 is connected with the input end of the cloud platform 8, the output end of the cloud platform 8 is connected with the input end of the execution module 9, and the execution module 9 controls the sludge reflux pump 11 through signals.
The water inlet flowmeter 1 acquires water inlet flow data, and the arrow direction indicating the flow direction on the sensor shell is consistent with the flow direction of sewage in the water inlet pipe; the sludge flowmeter 2 acquires sludge backflow data, and the direction of an arrow indicating the flow direction on the sensor shell is consistent with the sludge backflow direction; when the first concentration meter 3 and the second concentration meter 4 are installed, the sensors adopt an immersion type installation mode, the first concentration meter 3 collects the sludge concentration in the biochemical pool 5, the probe of the sensor is opposite to the sludge flow direction, the second concentration meter 4 collects the backflow sludge concentration, and the probe of the sensor is opposite to the sludge backflow direction; the effluent turbidity meter 13 collects the effluent suspended matter concentration.
The system also comprises an adjusting valve 10, wherein the adjusting valve 10 is installed on a sludge return pipeline 61 and is positioned between the secondary sedimentation tank 6 and the sludge flowmeter 2, an arrow on a valve body is consistent with the sludge return direction when the adjusting valve 10 is installed, and the adjusting valve 10 is controlled by a signal of the execution module 9 to adjust the sludge return quantity.
The system also comprises an excess sludge discharge pump 12 and a sludge discharge pipeline 62, wherein the excess sludge discharge pump 12 is arranged on the sludge discharge pipeline 62, and the sludge discharge pipeline 62 is connected to the bottom of the secondary sedimentation tank 6.
The first concentration meter 3 is arranged at the distance of 1m from the bottom of the biochemical pool 5, so that the detection data is more accurate.
The implementation mode of the sludge reflux control system based on the sludge age in the embodiment of the utility model is as follows: the sewage flows into a biochemical pool 5 from a preorder process through a water inlet pipe, before flowing to the biochemical pool 5, a water inlet flow meter 1 collects water inlet flow data, after flowing into the biochemical pool 5, a first concentration meter 3 records the sludge concentration in the biochemical pool 5, pollutants in the sewage are biodegraded in the biochemical pool 5, the treated sewage enters a secondary sedimentation pool 6, the sewage is subjected to mud-water separation in the secondary sedimentation pool 6, a second concentration meter 4 collects return sludge concentration, the treated supernatant flows to a subsequent process through a water discharge pipe 14, a water outlet turbidity meter 13 records the concentration of suspended matters in water, part of the sludge flows back to a water inlet of the biochemical pool 5 through a sludge return pipe 61, a sludge flow meter 2 positioned in the sludge return pipe 61 collects sludge return flow data, and the rest sludge is discharged through a rest sludge discharge pump 12 and a sludge discharge pipe 62.
Part of the sludge flows back to the water inlet of the biochemical pool 5, and the sludge return flow is controlled by controlling the motor frequency of the regulating valve 10 and the sludge return pump 11. The data transmission module 7 collects data collected by the water inlet flowmeter 1, the sludge flowmeter 2, the first concentration meter 3, the second concentration meter 4 and the water outlet turbidimeter 13, and uploads the data to the cloud platform 8, and the cloud platform 8 has a formula of theta according to the definition of sludge age (the average residence time of sludge in the biochemical pool) and the formula of thetac＝VX÷(QW*XR+(Q-QW)*Xe) V is the volume of the biochemical tank 5, X is the sludge concentration in the biochemical tank 5, Q is the inflow rate, QWFor excess sludge discharge, XRTo return the sludge concentration, XeAnalyzing and calculating the gathered data for the concentration of the suspended matters in the effluent, transmitting the calculation result to the execution module 9, sending a specific instruction to the execution module 9, receiving the instruction sent by the cloud platform 8 by the execution module 9, and controlling the valve of the regulating valve 10 and the motor frequency of the sludge reflux pump 11 to obtain the concentration of the suspended matters in the effluentAnd executing a corresponding instruction, controlling the sludge reflux amount, and transmitting the corresponding instruction to the cloud platform 8 for storage analysis through the data transmission module 7.
After a period of time adjustment, the sludge concentration and the backflow sludge concentration of the biochemical tank 5 are collected through the first concentration meter 3 and the second concentration meter 4, the sludge concentration and the backflow sludge concentration are transmitted to the cloud platform 8 through the data transmission module 7 to be analyzed, the sludge sedimentation performance of the secondary sedimentation tank 6 is judged, the calculation result is transmitted to the execution module 9, the execution module 9 controls the regulating valve 10 and the sludge reflux pump 11 to execute corresponding instructions, and the sludge reflux amount is fed back and regulated. If the mud-water interface of the secondary sedimentation tank 6 is close to the water surface, part of sludge fragments overflow, and the discharge amount of the residual sludge needs to be increased; if the retention time of the sludge in the secondary sedimentation tank 6 is too long, the sludge overflows along with the water flow after being decomposed due to oxygen-poor decomposition, and the sludge reflux quantity needs to be increased.
Through continuous active adjustment and feedback adjustment, the system gradually tends to be stable.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.
Claims (4)
1. A sludge reflux control system based on sludge age is characterized by comprising: the system comprises a water inlet flowmeter (1), a sludge flowmeter (2), a first concentration meter (3), a second concentration meter (4), a data transmission module (7), a cloud platform (8), an execution module (9), a sludge reflux pump (11) and a water outlet turbidity meter (13);
the water inlet flowmeter (1) is arranged on a water inlet pipe of the biochemical pool (5);
the sludge flowmeter (2) is arranged on a sludge return pipeline (61);
the first concentration meter (3) is arranged on the biochemical pool (5);
the second concentration meter (4) is arranged in a sludge hopper of the secondary sedimentation tank (6);
the sludge reflux pump (11) is arranged on a sludge reflux pipeline (61) and is positioned between the secondary sedimentation tank (6) and the sludge flowmeter (2);
the effluent turbidimeter (13) is arranged on a drain pipe (14);
the outlet of the biochemical tank (5) is connected with the inlet of the secondary sedimentation tank (6); the outlet of the sludge return pipeline (61) is connected with the water inlet pipe of the biochemical tank (5), and the inlet is connected with the bottom of the secondary sedimentation tank (6); the drain pipe (14) is connected with an outlet of the secondary sedimentation tank (6);
the water inlet flowmeter (1), the sludge flowmeter (2), the first concentration meter (3), the second concentration meter (4) and the water outlet turbidimeter (13) are all connected with the input end of the data transmission module (7);
the output end of the data transmission module (7) is connected with the input end of the cloud platform (8), the output end of the cloud platform (8) is connected with the input end of the execution module (9), and the execution module (9) controls the sludge reflux pump (11) through signals.
2. The sludge age-based sludge recirculation control system of claim 1, wherein: still include governing valve (10), mud return line (61) is located in governing valve (10), is located between two heavy ponds (6) and mud flowmeter (2), governing valve (10) are by execution module (9) signal control.
3. The sludge age-based sludge recirculation control system of claim 1, wherein: the device also comprises an excess sludge discharge pump (12) and a sludge discharge pipeline (62), wherein the excess sludge discharge pump (12) is arranged on the sludge discharge pipeline (62); the sludge discharge pipeline (62) is connected to the bottom of the secondary sedimentation tank (6).
4. The sludge age-based sludge recirculation control system of claim 1, wherein: the first concentration meter (3) is arranged at a distance of 1m from the biochemical pool (5) to the pool bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122405273.2U CN215517104U (en) | 2021-09-30 | 2021-09-30 | Sludge reflux control system based on sludge age |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122405273.2U CN215517104U (en) | 2021-09-30 | 2021-09-30 | Sludge reflux control system based on sludge age |
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| Publication Number | Publication Date |
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| CN215517104U true CN215517104U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122405273.2U Active CN215517104U (en) | 2021-09-30 | 2021-09-30 | Sludge reflux control system based on sludge age |
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2021
- 2021-09-30 CN CN202122405273.2U patent/CN215517104U/en active Active
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Address after: 250100 room 1013-1016, block B, building 1, Jinan Yaogu, Gangxing Third Road, Jinan area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Patentee after: Shandong Bohou Data Technology Co.,Ltd. Address before: 250100 room 313, building 4, Longao International Plaza, No. 909, Longao North Road, Jinan area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Patentee before: Shandong Bohou Data Technology Co.,Ltd. |