CN114428523B - Inflow water adjusting and controlling method for decentralized sewage treatment - Google Patents
Inflow water adjusting and controlling method for decentralized sewage treatment Download PDFInfo
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- CN114428523B CN114428523B CN202111679431.1A CN202111679431A CN114428523B CN 114428523 B CN114428523 B CN 114428523B CN 202111679431 A CN202111679431 A CN 202111679431A CN 114428523 B CN114428523 B CN 114428523B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 152
- 239000010865 sewage Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 83
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 230000033228 biological regulation Effects 0.000 claims abstract description 9
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Flow Control (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention discloses a water inflow regulation control method for decentralized sewage treatment. The water inlet pump and the liquid level sensor of the regulating tank are all positioned in the regulating tank; the water inlet pump of the regulating tank is correspondingly connected with the frequency converter of the water inlet pump; the water inlet flowmeter is positioned on a pipeline behind the water inlet pump of the regulating tank. The programmable logic controller can control the operation of the water inlet pump of the regulating tank under the action of operation logic by using the collected liquid level value and water inlet flow value, so as to realize accurate regulation and control of the water inlet amount of the distributed water treatment equipment. The invention can lead the sewage treatment equipment to regulate and control the water inflow amount in real time according to the change of the sewage amount, reduce the adverse effect of the fluctuation of the dispersed sewage amount on the subsequent process, effectively reduce the operation and maintenance strength of the dispersed sewage treatment equipment and improve the operation stability of the dispersed sewage treatment equipment.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a water inflow adjusting and controlling method for distributed sewage treatment.
Background
The sewage treatment equipment in remote decentralized areas such as expressway service areas and rural areas has the characteristics of small construction scale, dispersed geographic positions, long distance from municipal pipe networks, no professional 24h on duty and the like, so that the sewage treatment equipment in the decentralized areas is crucial to ensure the stable operation of the equipment through self-regulation.
The existing technology for treating sewage in the decentralized areas is mostly based on biological methods, and the method has high treatment efficiency, low cost and simple and feasible technology, but needs to ensure relatively small water fluctuation.
Although the sewage in the dispersed areas is small in discharge amount, the sewage amount is influenced by factors such as water habit, holidays, seasons and the like of people, the water amount change is obvious, and the fluctuation of the water amount brings great challenges to the stable operation of sewage treatment equipment.
Compared with the intermittent water inlet operation mode, the continuous water inlet has certain advantages of maintaining the water temperature required by subsequent biochemical treatment, reducing pollution load fluctuation and ensuring the high-efficiency and stable operation of equipment.
The existing sewage treatment in the scattered areas mostly adopts an adjusting tank and a water inlet pump arranged in the adjusting tank as equipment for coping with water fluctuation. However, after the equipment is installed, the water quantity of the water inlet pump cannot be effectively regulated in real time according to the fluctuation condition of the sewage quantity, so that the following condition can occur frequently in the actual operation process, the water inlet quantity cannot be continuously and stably caused, the regulating function of the regulating tank cannot be fully exerted, and the water treatment equipment cannot stably operate for a long time: the water inflow amount of the water inflow pump is too large, sewage in the regulating tank is pumped out in a short time, and subsequent biochemical treatment equipment can treat water in a longer time; the water inflow amount of the water inflow pump is too small, sewage in the regulating tank cannot be treated in time, and the sewage overflows the regulating tank to pollute the surrounding environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a water inlet regulation control method for decentralized wastewater treatment, which organically combines the operation of a water inlet pump with the volume of a regulating tank, fully plays the regulating function of the regulating tank, effectively maintains the characteristic of large fluctuation of water quantity in a decentralized area, relatively stabilizes the treatment load of subsequent equipment and improves the stable operation efficiency of the equipment.
The utility model provides a water inflow regulation control method for decentralized sewage treatment, the governing system that uses includes equalizing basin, equalizing basin water inflow pump, level sensor, water inflow pump converter, water inflow flowmeter and programmable logic controller;
The water inlet pump of the regulating tank and the liquid level sensor are both positioned in the regulating tank, the liquid level sensor is used for reading the real-time liquid level value in the regulating tank, and the water inlet pump of the regulating tank is correspondingly connected with the frequency converter of the water inlet pump; the water inlet flowmeter is positioned on a pipeline behind the water inlet pump of the regulating tank; the liquid level sensor, the water inlet pump frequency converter, the regulating tank water inlet pump and the water inlet flowmeter are all connected with the programmable logic controller, and after the liquid level sensor transmits collected data to the programmable logic controller, the programmable logic controller compares and analyzes the collected data and acts on the water inlet pump frequency converter through operation logic; the regulating tank meets the hydraulic retention time of 18-24 hours;
The operation logic steps of the regulating system are as follows:
Step one: setting a liquid level numerical range of an adjusting tank and an initial water inflow numerical value in the programmable logic controller;
Step two: the programmable logic controller acts signals on the water inlet pump frequency converter according to the water inlet flow set value, and the water inlet pump frequency converter controls the water inlet pump of the regulating tank to feed water to the subsequent processing unit;
Step three: after the equipment runs for a period of time, the liquid level value in the regulating tank is read through the liquid level sensor, the read liquid level value in the regulating tank is fed back to the programmable logic controller, the programmable logic controller compares the liquid level value with the set liquid level value of the regulating tank, signals are acted on the water inlet pump frequency converter according to the comparison result, and the water inlet pump of the regulating tank is controlled to run through the water inlet pump frequency converter.
Step four: when the read liquid level value in the regulating tank is larger than the set liquid level range value of the regulating tank, the programmable logic controller increases the water inlet flow of the water inlet pump to a final value by increasing the frequency of the frequency converter of the water inlet pump; when the read liquid level value in the regulating tank is within the set liquid level range value of the regulating tank, the programmable logic controller maintains the frequency of the existing water inlet pump frequency converter, and the water inlet flow of the water inlet pump is maintained unchanged; when the read liquid level value in the regulating tank is smaller than the set liquid level range value of the regulating tank, the programmable logic controller reduces the frequency of the frequency converter of the water inlet pump, so that the water inlet flow of the water inlet pump is reduced to a final value.
Furthermore, in the fourth step, the initial inflow value and the final inflow value of the increasing or decreasing inflow pump are feedback signals respectively obtained by reading the values of the inflow flowmeter on the rear pipeline of the inflow pump.
Further, in the fourth step, the water inlet flow of the water inlet pump is increased or decreased, and the final flow value is calculated and adjusted by the following formula:
final flow value = present flow + (current level value-initial level value) regulating cell area/24 coefficient.
Preferably, the period of operation is the designed hydraulic residence time of the conditioning tank.
Preferably, the liquid level value of the regulating tank is set to be the liquid level height corresponding to 50% of the effective volume of the regulating tank.
Compared with the prior art, the water inlet adjusting and controlling method for the distributed sewage treatment has the advantages that:
1) The water level of the regulating tank and the water quantity of the water inlet pump are controlled in a linkage way, so that the water quantity regulating function of the regulating tank is fully exerted, and the problem of large change of the dispersed sewage water quantity is effectively solved;
2) The water inflow amount is automatically adjusted in time according to the liquid level change system of the regulating tank, so that the situation that sewage cannot be treated in time or no sewage can be treated is avoided for the distributed sewage treatment unit, the fluctuation of the water amount of the treatment unit is greatly reduced, the timeliness of water amount adjustment is improved, the stable operation of the distributed sewage treatment equipment is facilitated, and the complexity of operation and maintenance of the distributed sewage treatment is reduced;
3) Only the installation and transformation of a frequency converter, a liquid level signal point and a logic program are needed for old equipment, the reconstruction of water treatment equipment is not needed, and the transformation cost is low.
Drawings
Fig. 1 is a schematic diagram of a structure of a water inflow control device for decentralized wastewater treatment.
FIG. 2 is a logic diagram of the operation of a water inflow control method for decentralized wastewater treatment;
Wherein: the device comprises an adjusting tank 1, a programmable logic controller 2, a water inlet pump frequency converter 3, an adjusting tank water inlet pump 4, a liquid level sensor 5 and a water inlet flowmeter 6.
Detailed Description
In order to enable those skilled in the art to better understand the technical scheme of the present invention, the following describes in detail a water inflow regulation control method for decentralized sewage treatment provided by the present invention with reference to examples. The following examples are only illustrative of the present invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the water inflow regulation control system applied to the decentralized sewage treatment comprises a regulating tank 1, a programmable logic controller 2, a water inflow pump frequency converter 3, a regulating tank water inflow pump 4, a liquid level sensor 5 and a water inflow flowmeter 6.
The adjusting tank water inlet pump 4 and the liquid level sensor 5 are both positioned in the adjusting tank 1; the liquid level sensor 5 can read the real-time liquid level value in the regulating tank; the adjusting tank water inlet pump 4 is correspondingly connected with the water inlet pump frequency converter 3; the water inlet flowmeter 6 is positioned on a pipeline behind the water inlet pump 4 of the regulating tank; the water inlet pump frequency converter 3, the liquid level sensor 5 and the water inlet flow meter 6 are all connected with the programmable logic controller 2, and after the liquid level sensor 5 transmits collected data to the programmable logic controller 2, the programmable logic controller 2 performs comparison analysis on the collected data and acts on the water inlet pump frequency converter 3 through operation logic.
In the embodiment, the hydraulic retention time of the regulating tank 1 is 24 hours, the effective height of the regulating tank 1 is 3m, the area of the regulating tank 1 is 19.5 square meters, and the running time of the device in one day is 24 hours.
The above-mentioned water inflow regulation control method applied to decentralized sewage treatment, in this embodiment, the operation logic steps are as follows:
step one: according to the existing water level height and the actual sewage discharge amount, setting the liquid level and the range of an adjusting tank in the programmable logic controller 2 to be (1.5+/-0.3) m and the initial water inflow value of an adjusting tank water inflow pump to be 2.0m 3/h;
step two: the programmable logic controller 2 acts signals on the water inlet pump frequency converter 3 according to the initial water inlet flow value of the water inlet pump of 2.0m 3/h, and the water inlet pump frequency converter 3 controls the water inlet pump of the regulating tank to feed water to the subsequent processing unit at the flow rate of 2.0m 3/h;
Step three: after the equipment operates for 24 hours, the liquid level value in the regulating tank is read through the liquid level sensor 5, the read liquid level value in the regulating tank is fed back to the programmable logic controller 2, the programmable logic controller 2 compares the liquid level value with the set liquid level value of the regulating tank, and a signal acts on the water inlet pump frequency converter 2 according to a comparison result, and the operation of the water inlet pump 4 of the regulating tank is controlled through the water inlet pump frequency converter 3.
Step four: when the liquid level value in the regulating tank read in the step three is 2.5m, the liquid level value is higher than the set liquid level value (1.5+/-0.3) m of the regulating tank, and the programmable logic controller increases the water inlet flow of the water inlet pump to 2.8m 3/h by increasing the frequency of the frequency converter of the water inlet pump; when the read liquid level value in the regulating tank is within the range of the set liquid level value (1.5+/-0.3) m of the regulating tank, the programmable logic controller maintains the frequency of the existing water inlet pump frequency converter, and the water inlet flow of the water inlet pump is maintained unchanged; when the read liquid level value in the regulating tank is 0.5m, the value is lower than the set liquid level (1.5+/-0.3) m range of the regulating tank, and the programmable logic controller reduces the frequency of the frequency converter of the water inlet pump, and reduces the water inlet flow of the water inlet pump to 1.2m 3/h.
In the fourth step, the values read by the water inlet flowmeter 6 on the pipeline behind the water inlet pump 4 are taken as feedback signals for 2m 3/h、2.8m3/h and 1.2m 3/h; in the fourth step, the inflow rate of the water inlet pump is increased or decreased, and the final flow value is calculated and adjusted through the following formula:
amplified final flow value = 2m 3/h+(2.5m-1.5m)×19.5㎡/24h＝2.8m3/h;
The final flow value of the reduction = 2m 3/h+(0.5m-1.5m)×19.5㎡/24h＝1.2m3/h.
The liquid level range (1.5+/-0.3 m) of the regulating tank in the step is a range value set according to the actual water fluctuation condition.
In the step, the liquid level of the regulating tank is 1.5m which is half of the effective volume of the regulating tank 1, and corresponds to the height of the regulating tank.
In the first step, the initial water inflow rate of the water inflow pump is 2.0m 3/h which is set according to the actual daily average water amount.
While the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the present invention shall also be considered as the scope of the present invention.
Claims (1)
1. The water inflow regulation control method for the decentralized sewage treatment is characterized in that an applied regulation system comprises a regulating tank, a regulating tank water inflow pump, a liquid level sensor, a water inflow pump frequency converter, a water inflow flowmeter and a programmable logic controller;
The water inlet pump of the regulating tank and the liquid level sensor are both positioned in the regulating tank, the liquid level sensor is used for reading the real-time liquid level value in the regulating tank, and the water inlet pump of the regulating tank is correspondingly connected with the frequency converter of the water inlet pump; the water inlet flowmeter is positioned on a pipeline behind the water inlet pump of the regulating tank; the liquid level sensor, the water inlet pump frequency converter, the regulating tank water inlet pump and the water inlet flowmeter are all connected with the programmable logic controller, and after the liquid level sensor transmits collected data to the programmable logic controller, the programmable logic controller compares and analyzes the collected data and acts on the water inlet pump frequency converter through operation logic; the regulating tank meets the hydraulic retention time of 18-24 hours;
The operation logic steps of the regulating system are as follows:
Step one: setting a liquid level numerical range of an adjusting tank and an initial water inflow numerical value in the programmable logic controller;
Step two: the programmable logic controller acts signals on the water inlet pump frequency converter according to the water inlet flow set value, and the water inlet pump frequency converter controls the water inlet pump of the regulating tank to feed water to the subsequent processing unit;
Step three: after the equipment runs for a period of time, reading a liquid level value in the regulating tank through the liquid level sensor, reading a current flow value according to the flowmeter, feeding back the read liquid level value in the regulating tank to the programmable logic controller, comparing the value with the set liquid level value of the regulating tank by the programmable logic controller to obtain a final flow value, acting a signal on the water inlet pump frequency converter according to the final flow value, and controlling the water inlet pump of the regulating tank to run through the water inlet pump frequency converter;
the final flow value in the step three is calculated and adjusted through the following formula:
final flow value = current flow value + (current read regulating tank level value-set regulating tank level value) × regulating tank area/24× coefficient;
the initial water inflow value and the final water inflow value for increasing or decreasing the water inflow pump are feedback signals according to the value read by a water inflow flowmeter on a rear pipeline of the water inflow pump;
the operation period is the hydraulic retention time designed by the regulating tank;
the liquid level value of the set regulating tank is the liquid level height corresponding to 50% of the effective volume of the regulating tank.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376554A (en) * | 2008-10-08 | 2009-03-04 | 闫长军 | Dynamic control method and apparatus for sewage disposal |
| CN111573974A (en) * | 2020-05-15 | 2020-08-25 | 浙江开创环保科技股份有限公司 | Self-adaptive distributed sewage treatment device and treatment process |
| CN111994971A (en) * | 2020-08-03 | 2020-11-27 | 优德太湖水务（苏州）有限公司 | Distributed sewage treatment water inlet automatic adjusting device and method |
| CN112645441A (en) * | 2020-11-29 | 2021-04-13 | 山西省交通新技术发展有限公司 | Operation early warning system and method for dispersed micro sewage treatment device |
| CN112666902A (en) * | 2020-12-15 | 2021-04-16 | 广州资源环保科技股份有限公司 | Control method for distributed sewage treatment, terminal equipment and readable storage medium |
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- 2021-12-31 CN CN202111679431.1A patent/CN114428523B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376554A (en) * | 2008-10-08 | 2009-03-04 | 闫长军 | Dynamic control method and apparatus for sewage disposal |
| CN111573974A (en) * | 2020-05-15 | 2020-08-25 | 浙江开创环保科技股份有限公司 | Self-adaptive distributed sewage treatment device and treatment process |
| CN111994971A (en) * | 2020-08-03 | 2020-11-27 | 优德太湖水务（苏州）有限公司 | Distributed sewage treatment water inlet automatic adjusting device and method |
| CN112645441A (en) * | 2020-11-29 | 2021-04-13 | 山西省交通新技术发展有限公司 | Operation early warning system and method for dispersed micro sewage treatment device |
| CN112666902A (en) * | 2020-12-15 | 2021-04-16 | 广州资源环保科技股份有限公司 | Control method for distributed sewage treatment, terminal equipment and readable storage medium |
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Effective date of registration: 20240509 Address after: 030032 No. 27, Wuluo street, Shanxi Demonstration District, Taiyuan City, Shanxi Province Applicant after: Shanxi Communications New Technology Development Co.,Ltd. Country or region after: China Address before: 030032 No.27, Wuluo street, Taiyuan City, Shanxi Province Applicant before: Shanxi Communications New Technology Development Co.,Ltd. Country or region before: China Applicant before: SHANXI JIAOKE ENERGY-SAVING AND ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
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