CN216584257U - A governing system that intakes for distributed sewage treatment - Google Patents
A governing system that intakes for distributed sewage treatment Download PDFInfo
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- CN216584257U CN216584257U CN202123429979.9U CN202123429979U CN216584257U CN 216584257 U CN216584257 U CN 216584257U CN 202123429979 U CN202123429979 U CN 202123429979U CN 216584257 U CN216584257 U CN 216584257U
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Abstract
The utility model discloses a governing system that intakes for distributed sewage treatment, including equalizing basin, equalizing basin intake pump, level sensor, intake pump converter, inflow flowmeter, programmable logic controller. The regulating reservoir water inlet pump and the liquid level sensor are both positioned in the regulating reservoir; the regulating reservoir water inlet pump is correspondingly connected with the water inlet pump frequency converter; and the water inlet flow meter is positioned on a pipeline behind the water inlet pump of the adjusting tank. The programmable logic controller can control the operation of the regulating reservoir water inlet pump under the action of the operation logic according to the acquired liquid level value and the acquired water inlet flow value, so that the accurate regulation and control of the water inlet amount of the distributed water treatment equipment is realized. The utility model discloses can make sewage treatment device can change according to the sewage water yield and carry out real-time regulation and control to the inflow water yield, reduce the undulant adverse effect to follow-up technology of distributed sewage water yield, effectively reduce distributed sewage treatment device's fortune dimension intensity, improve distributed sewage treatment device's operating stability.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, in particular to a governing system that intakes for distributed sewage treatment.
Background
The sewage treatment equipment in remote scattered areas such as expressway service areas and rural areas has the characteristics of small construction scale, scattered geographical positions, long distance from municipal pipe networks, no professional staff on duty at the site of 24h and the like, so that the sewage treatment equipment in the scattered areas is vital to ensure the stable operation of the equipment through self-regulation.
The existing process for sewage treatment in decentralized regions is mainly a biological method, and although the method has high treatment efficiency, low cost and simple and feasible technology, relatively small water fluctuation needs to be ensured.
Although the discharge water volume of sewage in a decentralized area is small, the sewage volume is influenced by factors such as water consumption habits of people, holidays, seasons and the like, the water volume change is obvious, and the fluctuation of the water volume brings great challenges to the stable operation of sewage treatment equipment.
Compared with an intermittent water inlet operation mode, continuous water inlet has certain advantages for maintaining the water temperature required by subsequent biochemical treatment, reducing pollution load fluctuation and ensuring high efficiency and stability of equipment operation.
Most of the existing sewage treatment in the decentralized region adopts an adjusting tank and an internal water inlet pump as equipment for coping with water quantity fluctuation. But because this equipment fixing accomplishes the back, the intake pump water yield can't be effectively adjusted in real time according to the undulant condition of sewage water yield to make the following condition can appear often among the actual motion process, lead to the water yield of intaking to be unable continuous and stable, the regulatory function of equalizing basin can't obtain full play, water treatment facilities can't long-term steady operation: the water inlet amount of the water inlet pump is too large, the sewage in the regulating reservoir is pumped out in a short time, and the subsequent biochemical treatment equipment can be treated without water in a longer time; the water inflow amount of the water inflow pump is too small, the sewage in the regulating reservoir cannot be treated in time, and the sewage overflows the regulating reservoir to pollute the surrounding environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, provide the governing system that intakes for distributed sewage treatment, combine intake pump operation with the equalizing basin volume organically, the regulatory function of full play equalizing basin effectively deals with the undulant characteristics of dispersion area water yield, maintains follow-up equipment treatment load relatively stable, improve equipment steady operation efficiency.
A water inlet regulation control method for distributed sewage treatment is characterized in that an applied regulation system comprises a regulation pool, a regulation pool water inlet pump, a liquid level sensor, a water inlet pump frequency converter, a water inlet flowmeter and a programmable logic controller;
the regulating reservoir water inlet pump and the liquid level sensor are both positioned in the regulating reservoir, the liquid level sensor is used for reading a liquid level real-time numerical value in the regulating reservoir, and the regulating reservoir water inlet pump is correspondingly connected with the water inlet pump frequency converter; the water inlet flow meter is positioned on a pipeline behind the water inlet pump of the regulating reservoir; the liquid level sensor, the water inlet pump frequency converter, the regulating reservoir water inlet pump and the water inlet flowmeter are all connected with the programmable logic controller, after the liquid level sensor transmits the acquired data to the programmable logic controller, the programmable logic controller contrasts and analyzes the acquired data and acts on the water inlet pump frequency converter through operation logic; the adjusting tank meets the hydraulic retention time of 18-24 hours.
The operation logic steps of the regulating system are as follows:
the method comprises the following steps: setting a liquid level numerical range and an initial water inflow flow numerical value of the regulating tank in the programmable logic controller;
step two: the programmable logic controller acts a signal 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 reservoir to feed water to the subsequent treatment unit;
step three: after the equipment runs for a period of time, reading a liquid level value in the regulating reservoir through the liquid level sensor, feeding the read liquid level value in the regulating reservoir back to the programmable logic controller, comparing the value with a set regulating reservoir liquid level value by the programmable logic controller, acting a signal on the water inlet pump frequency converter according to a comparison result, and controlling the operation of the water inlet pump of the regulating reservoir through the water inlet pump frequency converter.
Step four: when the read liquid level value in the regulating reservoir is larger than the set liquid level range value of the regulating reservoir, the programmable logic controller increases the frequency of a frequency converter of the water inlet pump to increase the water inlet flow of the water inlet pump to a final value; when the read liquid level value in the regulating reservoir is within the set liquid level range value of the regulating reservoir, the programmable logic controller maintains the frequency of the existing frequency converter of the water inlet pump, and the water inlet flow of the water inlet pump is maintained unchanged; when the read liquid level value in the regulating reservoir is smaller than the set liquid level range value of the regulating reservoir, 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, the initial water inlet flow value and the final flow value of the water inlet pump which is increased or decreased in the fourth step are all values read by a water inlet flow meter on a pipeline behind the water inlet pump as feedback signals.
Further, in the fourth step, the inflow rate of the intake pump is increased or decreased, and the final flow value is calculated and adjusted by the following formula:
final flow value ═ current flow + (current level value-initial level value) · conditioning cell area/24 × coefficient.
Preferably, the operation period is the designed hydraulic retention time of the regulating reservoir.
Preferably, the set liquid level value of the adjusting tank is the liquid level height corresponding to 50% of the effective volume of the adjusting tank.
Compared with the prior art, a governing system that intakes for distributed sewage treatment's advantage lies in:
1) the liquid level of the regulating tank and the water quantity of the water inlet pump are controlled in a linkage manner, so that the water quantity regulating effect of the regulating tank is fully exerted, and the problem of large variation of distributed sewage quantity is effectively solved;
2) the water inlet amount is automatically adjusted in time according to the adjusting tank liquid level change system, so that the distributed sewage treatment units are prevented from the situation that sewage cannot be treated in time or cannot be treated, the fluctuation of the water amount of the treatment units is greatly reduced, the timeliness of water amount adjustment is improved, the stable operation of distributed sewage treatment equipment is facilitated, and the complexity of operation and maintenance of distributed sewage treatment is reduced;
3) the installation and the reconstruction of a frequency converter, a liquid level signal point and a logic program are only needed to be carried out on the old equipment, the reconstruction of water treatment equipment is not needed, and the reconstruction cost is low.
Drawings
FIG. 1 is a logic diagram of the operation of a method for inlet water regulation control for decentralized wastewater treatment;
wherein: the device comprises a regulating reservoir 1, a programmable logic controller 2, a water inlet pump frequency converter 3, a regulating reservoir water inlet pump 4, a liquid level sensor 5 and a water inlet flow meter 6.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the water inlet adjusting system for decentralized sewage treatment provided by the present invention is described in detail below with reference to the following embodiments. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, a water inlet regulation control system applied to distributed sewage treatment comprises a regulating reservoir 1, a programmable logic controller 2, a water inlet pump frequency converter 3, a regulating reservoir water inlet pump 4, a liquid level sensor 5 and a water inlet flow meter 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 needs to be capable of reading the real-time numerical value of the liquid level in the regulating reservoir; the regulating reservoir water inlet pump 4 is correspondingly connected with the water inlet pump frequency converter 3; the water inlet flow meter 6 is positioned on a pipeline behind the regulating reservoir water inlet pump 4; 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, after the liquid level sensor 5 transmits collected data to the programmable logic controller 2, the programmable logic controller 2 contrasts and analyzes the collected data and acts on the water inlet pump frequency converter 3 through operation logic.
In the embodiment, the adjusting tank 1 can meet the requirement of 24 hours of hydraulic retention time, the effective height of the adjusting tank 1 is 3m, the area of the adjusting tank 1 is 19.5 square meters, and the one-day operation time of the equipment is 24 hours.
The operation logic steps of the water inlet regulating system applied to the distributed sewage treatment are as follows:
the method comprises the following steps: setting the liquid level and the range of the regulating tank to be (1.5 +/-0.3) m and the initial water inlet flow value of the water inlet pump of the regulating tank to be 2.0m in the programmable logic controller 2 according to the existing water level height and the actual sewage discharge amount3/h；
Step two: the programmable logic controller 2 is used for controlling the initial water inlet flow value of 2.0m according to the water inlet pump3The signal is acted on the water inlet pump frequency converter 3, and the water inlet pump of the regulating reservoir is controlled by the water inlet pump frequency converter 3 to be 2.0m3The flow rate of the water/h is used for feeding water to a subsequent treatment unit;
step three: after the equipment runs for 24 hours, reading the liquid level value in the regulating reservoir through the liquid level sensor 5, feeding the read liquid level value in the regulating reservoir back to the programmable logic controller 2, comparing the value with the set liquid level value of the regulating reservoir by the programmable logic controller 2, acting a signal on the water inlet pump frequency converter 2 according to the comparison result, and controlling the operation of the water inlet pump 4 of the regulating reservoir through the water inlet pump frequency converter 3.
Step four: when the liquid level value in the regulating reservoir read in the third step is 2.5m and is higher than the set liquid level value (1.5 +/-0.3) m of the regulating reservoir, the programmable logic controller increases the frequency of the frequency converter of the water inlet pump to increase the water inlet flow of the water inlet pump to 2.8m3H; when the read liquid level value in the regulating reservoir is within the range of the set liquid level value (1.5 +/-0.3) m of the regulating reservoir, the programmable logic controller maintains the frequency of the frequency converter of the existing water inlet pump, and the water inlet flow of the water inlet pump is kept unchanged; when the read liquid level value in the regulating reservoir is 0.5m and is lower than the set liquid level (1.5 +/-0.3) m range of the regulating reservoir, the programmable logic controller reduces the frequency of a frequency converter of the water inlet pump and reduces the water inlet flow of the water inlet pump to 1.2m3/h。
2m in the fourth step3/h、2.8m3H and 1.2m3The feedback signals are the values read by a water inlet flow meter 6 on the pipeline behind the water inlet pump 4; in the fourth step, the inflow of the water inlet pump is increased or decreased, and the final flow value is calculated and adjusted through the following formula:
final flow rate value of 2m3/h+(2.5m-1.5m)×19.5㎡/24h＝2.8m3/h；
Final flow value of 2m3/h+(0.5m-1.5m)×19.5㎡/24h＝1.2m3/h。
In the above steps, the liquid level range (1.5 +/-0.3 m) of the regulating tank is a range value set according to the fluctuation condition of the actual water amount.
In the above steps, the liquid level of the regulating tank is 1.5m, which is the height of the regulating tank corresponding to half of the effective volume of the regulating tank 1.
The initial water inlet flow value of the water inlet pump in the step one is 2.0m3The/h is a set value according to the actual daily average water quantity.
The present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art.
Claims (1)
1. A water inlet regulating system for distributed sewage treatment is characterized by comprising a regulating reservoir, a regulating reservoir water inlet pump, a liquid level sensor, a water inlet pump frequency converter, a water inlet flow meter and a programmable logic controller;
the regulating reservoir water inlet pump and the liquid level sensor are both positioned in the regulating reservoir, the liquid level sensor is used for reading a liquid level real-time numerical value in the regulating reservoir, and the regulating reservoir water inlet pump is correspondingly connected with the water inlet pump frequency converter; the water inlet flow meter is positioned on a pipeline behind the water inlet pump of the regulating reservoir; the liquid level sensor, the water inlet pump frequency converter, the regulating reservoir water inlet pump and the water inlet flow meter are all connected with the programmable logic controller, after the liquid level sensor transmits collected data to the programmable logic controller, the programmable logic controller contrasts and analyzes the collected data and acts on the water inlet pump frequency converter through operation logic.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116375143A (en) * | 2023-05-12 | 2023-07-04 | 安徽臻环生态科技有限公司 | Landfill leachate treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116375143A (en) * | 2023-05-12 | 2023-07-04 | 安徽臻环生态科技有限公司 | Landfill leachate treatment system and method |
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