CN219815397U - Automatic back flush V type filtering pond - Google Patents
Automatic back flush V type filtering pond Download PDFInfo
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- CN219815397U CN219815397U CN202320857708.3U CN202320857708U CN219815397U CN 219815397 U CN219815397 U CN 219815397U CN 202320857708 U CN202320857708 U CN 202320857708U CN 219815397 U CN219815397 U CN 219815397U
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- 238000001914 filtration Methods 0.000 title description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 135
- 238000011010 flushing procedure Methods 0.000 claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 230000000737 periodic effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000001932 seasonal effect Effects 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides an automatic back flushing V-shaped filter tank, which comprises a plurality of filter tank bodies and a back flushing system, wherein the filter tank bodies are arranged in parallel, the back flushing system comprises a PLC (programmable logic controller), a valve controller, a clean water tank, a back flushing water pump, a back flushing fan, a back flushing water collecting well and a recovery water tank, a filter tank liquid level meter is arranged in each filter tank body and is connected with the clean water tank through a water outlet regulating valve, and the water outlet regulating valve is used for monitoring the opening degree of the clean water valve of the corresponding filter tank body; the filter tank liquid level meter is used for monitoring the filter tank liquid level corresponding to the filter tank body; and the PLC is used for judging that the corresponding filter body is blocked when the opening of the clear water valve is larger than the blocking threshold value and the liquid level of the filter is larger than the first liquid level threshold value, and sending a control signal to the valve controller to control the start of a back flushing program. The utility model can automatically adjust the backflushing period according to different water quality change systems; the water waste caused by frequent recoil is saved; reduces manual intervention, and can meet the construction requirements of the existing automatic and intelligent water plants.
Description
Technical Field
The utility model relates to the technical field of tap water treatment, in particular to an automatic back flushing V-shaped filter tank.
Background
The V-shaped filter backflushing is an important process link of tap water treatment, and relates to the water quality safety of factory water and the sewage interception capability of the filter. In the operation process of the V-shaped filter, as the filtering time of the filter is increased, impurities stored in the filter bed can cause the porosity of the filter bed to be reduced, the amount of the impurities which can be trapped by the filter bed is continuously reduced, when the opening degree of a clear water valve is larger than the setting of the blocking degree and the liquid level continuously rises, or when the turbidity of filtered water is increased finally due to the penetration of suspended substances, the filter is stopped finally, and the V-shaped filter is required to be backwashed at the moment to remove the impurities trapped in the filter bed, so that the operation capacity of the filter is recovered.
The back flushing of the V-shaped filter tank comprises three stages of single-gas flushing, gas-water combined flushing and single-water flushing. The V-shaped filter back flushing of the water works is mostly carried out by periodic back flushing according to the working period of the filter. The periodic backflushing of the V-shaped filter tank is set by a process engineer of a water plant or experience accumulated for a long time, and frequent regulation of the backflushing period is required in the weather of large water quality fluctuation or heavy rain. However, under the condition of different water quality, the periodic backflushing is difficult to judge the backflushing period of the filter tank manually; when the water quality fluctuates due to seasonal variation, the recoil period needs to be frequently changed manually; frequent backflushing causes water waste; periodic recoil is unfavorable for the whole automatic closed-loop control of the filter tank. Therefore, with the improvement of automation degree of the water works, the simple periodic back flushing mode cannot meet the intelligent water service requirement of the water works.
Based on this, a new solution is needed.
Disclosure of Invention
The utility model aims to solve the problems that the conventional periodic backflushing is difficult to judge the backflushing period of a filter tank manually under different water quality conditions, the backflushing period is required to be changed manually when the water quality fluctuates due to seasonal variation, the water quantity is wasted due to frequent backflushing, and the periodic backflushing is unfavorable for the whole automatic closed-loop control of the filter tank.
According to one aspect of the utility model, an automatic back flushing V-shaped filter tank is provided, the V-shaped filter tank comprises a plurality of filter tank bodies and a back flushing system, the filter tank bodies are arranged in parallel, the back flushing system comprises a PLC (programmable logic controller), a valve controller, a clean water tank, a back flushing fan, a back flushing water pump, a back flushing water collecting well and a recovery water tank, a filter tank liquid level meter is arranged in each filter tank body, each filter tank body is connected with the clean water tank of the back flushing system through a water outlet regulating valve, and the water outlet regulating valve is used for monitoring the opening of the clean water valve of the corresponding filter tank body and transmitting the opening to the PLC; the filter tank liquid level meter is used for monitoring the filter tank liquid level of the corresponding filter tank body and transmitting the filter tank liquid level to the PLC; and the PLC is used for judging that the corresponding filter body is blocked when the opening of the clear water valve is larger than the blocking threshold value and the liquid level of the filter is larger than the first liquid level threshold value, and sending a control signal to the valve controller to control the start of a back flushing program.
In the automatic back flushing V-shaped filter provided by the utility model, the filter liquid level meter is an ultrasonic liquid level meter.
In the automatic back flushing V-shaped filter tank provided by the utility model, the water outlet regulating valve is an electric regulating valve.
In the automatic back flushing V-shaped filter provided by the utility model, each filter body is connected with a back flushing water collecting well of the back flushing system through a back flushing water valve.
In the automatic back flushing V-shaped filter provided by the utility model, the back flushing water pump is arranged between the back flushing water valve and a back flushing water collecting well of the back flushing system.
In the automatic back flushing V-shaped filter provided by the utility model, each filter body is connected with a back flushing fan of the back flushing system through a back flushing air valve.
In the automatic back flushing V-shaped filter provided by the utility model, each filter body is connected with a recovery water tank of the back flushing system through a drain valve.
The automatic back flushing V-shaped filter tank has the following beneficial effects: according to the automatic back flushing V-shaped filter provided by the utility model, the electric regulating valve and the ultrasonic liquid level meter are adopted to carry out the linkage control of the water outlet of the filter, when the opening degree of the clear water valve of the water outlet regulating valve of the filter is larger than a set blocking threshold value and the actual liquid level of the filter is larger than a set liquid level, the filter is judged to be blocked, and a back flushing is carried out by triggering a control program of blocking back flushing at the moment, so that the back flushing period can be automatically regulated according to different water quality change systems according to the blocking degree of the filter as the basis of back flushing triggering, and the filter is ensured to be in a benign operation condition; the water waste caused by frequent back flushing is saved, and the cost is reduced; the traditional manually set recoil period is replaced, manual intervention is reduced, the system is enabled to run more stably and reliably, and the construction requirements of the existing automatic and intelligent water plant can be met.
Drawings
For a clearer description of an embodiment of the utility model or of a technical solution in the prior art, the drawings that are needed in the description of the embodiment or of the prior art will be briefly described, it being obvious that the drawings in the description below are only embodiments of the utility model, and that other drawings can be obtained, without inventive effort, by a person skilled in the art from the drawings provided:
FIG. 1 is a schematic diagram showing connection between a filter body and a backflushing system of an automatic backflushing V-shaped filter according to an embodiment of the present utility model;
FIG. 2 is a flow chart of an automatic backwash control method for an automatic backwash V-shaped filter tank according to an embodiment of the utility model;
fig. 3 shows a partial program control implementation of a PLC controller according to an embodiment of the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Exemplary embodiments of the present utility model are illustrated in the accompanying drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
The general idea of the utility model is as follows: aiming at the problems that the conventional periodic backflushing is difficult to judge the backflushing period of the filter tank manually under different water quality conditions, the backflushing period is required to be changed manually when the water quality fluctuates due to seasonal variation, water is wasted due to frequent backflushing, and the periodic backflushing is unfavorable for the whole automatic closed-loop control of the filter tank, the automatic backflushing V-shaped filter tank is provided, when the opening degree of a clear water valve of a water outlet regulating valve of the filter tank is larger than a set blocking threshold value and the actual liquid level of the filter tank is larger than a set liquid level by adopting an electric regulating valve and an ultrasonic liquid level meter for the linkage control of the water outlet of the filter tank, the filter tank is blocked, and a control program for blocking the backflushing is triggered at the moment to backflush, so that the backflushing period can be automatically regulated according to different water quality change systems by taking the blocking degree of the filter tank as the basis of backflushing triggering, and a benign operation condition of the filter tank is ensured; the water waste caused by frequent back flushing is saved, and the cost is reduced; the traditional manually set recoil period is replaced, manual intervention is reduced, the system is enabled to run more stably and reliably, and the construction requirements of the existing automatic and intelligent water plant can be met.
In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present utility model are detailed descriptions of the technical solutions of the present utility model, and not limit the technical solutions of the present utility model, and the technical features in the embodiments and examples of the present utility model may be combined with each other without conflict.
FIG. 1 is a schematic view showing a connection between a filter body and a backflushing system of a V-shaped filter according to an embodiment of the present utility model. The V-shaped filter provided by the utility model comprises a plurality of filter bodies and a backflushing system, wherein the filter bodies are arranged in parallel, and each filter body in the V-shaped filter is independently backflushed, namely only one filter body is flushed in each backflushing. As shown in fig. 1, the backflushing system comprises a PLC controller (not shown), a valve controller (not shown), a clean water tank 10, a backflushing fan 20, a backflushing water collecting well 30 and a recovery water tank 80, wherein a filter tank liquid level meter 40 is arranged in each filter tank body, each filter tank body is connected with the clean water tank 10 of the backflushing system through a water outlet regulating valve 50, each filter tank body is connected with the backflushing water collecting well 30 of the backflushing system through a backflushing water valve 60, each filter tank body is connected with the backflushing fan 20 of the backflushing system through a backflushing air valve 70, and each filter tank body is connected with the recovery water tank 80 of the backflushing system through a drain valve 90; a water outlet flowmeter 100 is further arranged between the water outlet regulating valve 50 and the clean water tank 10 of the backflushing system; a backwash water flowmeter 110 and a backwash water pump (not shown) are also arranged between the backwash water collection well 30 and the backwash water valve 60; and a valve control signal is sent to the valve controller through the PLC, and then the valve controller controls the opening and closing of the corresponding valve to finish the backwashing process. At the beginning, the default V-shaped filter tank is in a constant water level filtering process, namely, the water outlet regulating valve is in an open state, and constant water level filtering is carried out according to the set liquid level.
Specifically, in one embodiment of the present utility model, the filter liquid level gauge 40 disposed in each filter body is used to monitor the filter liquid level of the filter body where the filter liquid level gauge is located and transmit the monitored liquid level signal to the PLC controller, where the filter liquid level gauge 40 may use an ultrasonic liquid level gauge to convert the monitored liquid level signal into a current signal and send the current signal to the current signal input end of the PLC controller, and if the filtering is performed, the liquid level of the filter body will gradually rise, and the PCL controller compares the liquid level with a comparator disposed therein to determine whether the filter liquid level is greater than a preset value.
Specifically, in an embodiment of the present utility model, the outlet control valve 50 disposed between each filter body and the clean water tank is used to monitor the opening of the clean water valve of the filter body to which it is connected and transmit the opening to the PLC controller, where the outlet control valve 50 may electrically control the valve, and may send the opening of the valve to the PLC controller as an electrical signal, and as filtration proceeds, the greater the clogging degree of the outlet control valve, the PCL controller compares the opening of the clean water valve with a comparator provided therein to determine whether the opening of the clean water valve is greater than the clogging threshold.
Specifically, in an embodiment of the present utility model, the PLC controller is configured to determine that a corresponding filter body is blocked when the opening of the clean water valve is greater than a blocking threshold and the liquid level of the filter is greater than a first liquid level threshold, and send a control signal to the valve controller to control start of a backwash procedure. Further, when the opening of the clear water valve is larger than the blockage threshold value and the duration time that the liquid level of the filter tank is larger than the set liquid level threshold value exceeds the blockage time threshold value, the PLC controller judges that the corresponding filter tank body is blocked, for example, when the opening of the clear water valve is larger than the blockage threshold value and the liquid level of the filter tank is larger than the set threshold value for more than 5 minutes, the condition that the blockage backflushing condition is met is considered, and an automatic backflushing flow is started.
It will be appreciated by those skilled in the art that the PCL controller of the present utility model determines whether a blockage occurs based on the opening degree of the clean water valve and the liquid level and the duration time of the filter tank, which does not require complex program logic, but only uses the functions of the logic circuits in the prior art, and does not perform processing calculation on the opening degree of the clean water valve and the liquid level of the filter tank, but only uses a device for receiving signals and outputting signals, which can be implemented by using a combination of logic circuits such as a comparator, and as shown in fig. 3, part of logic control of the present utility model is shown in (1): filter clogging degree setting (2): occlusion duration setting (3): clogging determination (4): triggering the occlusion control program. The electronic device may be a hardware product with a certain shape and structure, and the application is to combine and connect these triode devices according to a logic relationship, so as to realize the function of a logic module, for example, the electronic device may be realized by a logic circuit that the collector of one triode is connected with the emitter of another triode, which may be regarded as a simple and gate circuit, namely: when the bases of the two triodes are connected with high level, the circuit is conducted, and only one triode is not connected with high level, the circuit is not conducted, namely, the function of the PLC can be realized by configuring the triodes with corresponding quantity and specification, so that the PLC can output corresponding results according to the logic relation according to whether corresponding signals are received or not. Alternatively, the logic circuit may be implemented by a control circuit formed by a relay, the change of an external signal is monitored according to the action characteristic of the relay, the on and off of some control circuits in the logic circuit are controlled by the contacts of the relay, the logic reaction is also the on and off logic of the circuit, the setting is not performed by a computer program, and the function can be implemented only by matching a hardware circuit with a common relay.
FIG. 2 is a flow chart of an automatic backwash control method for a V-shaped filter according to an embodiment of the present utility model. As shown in FIG. 2, the back flushing automatic control method for the V-shaped filter tank provided by the utility model comprises the following steps:
step S1, monitoring the opening degree of a clear water valve corresponding to the filter tank body through the water outlet regulating valve and transmitting the opening degree to a PLC (programmable logic controller);
step S2, monitoring the liquid level of the filter tank corresponding to the filter tank body through the liquid level meter of the filter tank and transmitting the liquid level of the filter tank to a PLC (programmable logic controller);
and S3, judging that the corresponding filter body is blocked when the opening of the clear water valve is larger than a blocking threshold value and the liquid level of the filter is larger than a first liquid level threshold value.
Further, in an embodiment of the present utility model, the PLC controller determines that the corresponding filter body is clogged when the opening of the clean water valve is greater than the clogging threshold value and the duration of time that the filter liquid level is greater than the set liquid level threshold value exceeds the clogging time threshold value, for example, when the opening of the clean water valve is greater than the clogging threshold value and the filter liquid level is greater than the set threshold value for more than 5 minutes, the condition of clogging backflushing is considered to be met, and starts the automatic backflushing flow.
And S4, the PLC controller sends a control signal to the valve controller to control the start of a backwashing program.
Specifically, in one embodiment of the present utility model, the backwash procedure includes:
(1) The preparation stage: when the PLC receives the flushing instruction, back flushing condition inspection is carried out: the water collecting well liquid level is met, the valves of the back flushing fan, the water pump and the filter tank are free from faults, the back flushing of the filter tank is avoided, and the water collecting well is continued for more than half an hour, if the flushing conditions are met, the flushing procedure is carried out. Closing a water inlet valve, and simultaneously adjusting a water outlet regulating valve corresponding to the filter body to the maximum opening; and closing the water outlet regulating valve when the liquid level of the corresponding filter tank body is reduced to a second liquid level threshold value or the time for keeping the maximum opening of the water outlet regulating valve is greater than a preset time threshold value.
(2) And (3) a drainage stage: opening a drain valve, emptying residual water in the filter tank body, and synchronously opening a reverse air flushing valve;
(3) And (3) an air flushing stage: opening an air flushing valve, and starting a blower to perform air flushing after the valve is opened in place for 3min (adjustable);
(4) And (3) a gas-water backflushing stage: opening a reverse water flushing valve after the air flushing is completed;
(5) And a gas-water combined back flushing stage: starting a backwashing water pump, and opening an outlet valve after the water pump is started for 5min (adjustable);
(6) And (3) finishing gas-water combined recoil: closing a fan, and closing a fan outlet valve after the fan is stopped;
(7) And (3) water flushing stage: closing the reverse air flushing valve after the shutdown of the fan is completed;
(8) And (3) water flushing stage: starting a second water pump, synchronously opening an exhaust valve, and flushing for 4min (adjustable);
(9) And (3) ending water flushing: closing the water flushing valve, stopping the water flushing pump after the water flushing valve is closed in place, closing the water pump outlet valve, and synchronously closing the exhaust valve;
(10) And (3) recovering and filtering: and after the back flushing is finished, firstly closing the drain valve, opening the water inlet valve after the drain valve is closed in place, and opening the water outlet regulating valve to perform automatic constant water level filtering after the liquid level of the filter grid is recovered to be normal 1.55 m.
Further, in an embodiment of the utility model, in order to ensure the water quality safety, no matter what faults occur in the backflushing process, the filter tank is restored to a manual mode, namely all valves are controlled to be closed through a PLC controller, all relevant backflushing equipment is stopped, and a popup window alarm is sent.
Taking a V-shaped filter tank comprising 8 filter tank bodies as an example, adopting the periodic backflushing of the traditional method, wherein the backflushing period of one V-shaped filter tank is 36H, and the water quantity required by backflushing one filter tank is about 1500m 3 The required amount of water for one day is (24/36) 1500=1000m 3 . By the automatic backflushing control according to the clogging degree of the utility model, the backflushing period can be prolonged by N hours, and the water required per day is (24/(36+N))/1500 m 3 . In particular, table 1 shows that the cost can be reduced by the method of the utility model.
TABLE 1 comparison of cycle recoil and recoil effects according to the degree of clogging
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed utility model requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this utility model.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the utility model, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The utility model may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
Claims (7)
1. The automatic back flushing V-shaped filter tank is characterized by comprising a plurality of filter tank bodies and a back flushing system, wherein the filter tank bodies are arranged in parallel, the back flushing system comprises a PLC (programmable logic controller), a valve controller, a clean water tank, a back flushing fan, a back flushing water pump, a back flushing water collecting well and a recovery water tank, a filter tank liquid level meter is arranged in each filter tank body, each filter tank body is connected with the clean water tank of the back flushing system through a water outlet regulating valve, and the water outlet regulating valve is used for monitoring the opening of the clean water valve of the corresponding filter tank body and transmitting the opening to the PLC; the filter tank liquid level meter is used for monitoring the filter tank liquid level of the corresponding filter tank body and transmitting the filter tank liquid level to the PLC; and the PLC is used for judging that the corresponding filter body is blocked when the opening of the clear water valve is larger than the blocking threshold value and the liquid level of the filter is larger than the first liquid level threshold value, and sending a control signal to the valve controller to control the start of a back flushing program.
2. The automatic backwash V-bank filter of claim 1 wherein the filter level gauge is an ultrasonic level gauge.
3. The automatic backwash V-bank filter of claim 1 wherein the outlet regulator valve is an electrically operated regulator valve.
4. The automatic backwash V-bank filter of claim 1 wherein each filter body is connected to a backwash water collection well of the backwash system by a backwash water valve.
5. The automatic backwash V-bank filter of claim 4 wherein the backwash pump is disposed between the backwash water valve and a backwash water collection well of the backwash system.
6. The automatic backwash V-bank filter of claim 1 wherein each filter body is connected to a backwash fan of the backwash system by a backwash air valve.
7. The automatic backwash V-bank filter of claim 1 wherein each filter body is connected to the recovery pond of the backwash system by a drain valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320857708.3U CN219815397U (en) | 2023-04-07 | 2023-04-07 | Automatic back flush V type filtering pond |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320857708.3U CN219815397U (en) | 2023-04-07 | 2023-04-07 | Automatic back flush V type filtering pond |
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| Publication Number | Publication Date |
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| CN219815397U true CN219815397U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320857708.3U Active CN219815397U (en) | 2023-04-07 | 2023-04-07 | Automatic back flush V type filtering pond |
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| CN (1) | CN219815397U (en) |
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- 2023-04-07 CN CN202320857708.3U patent/CN219815397U/en active Active
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