CN103449555A - Carbon filter water quality advanced processing control method and device thereof based on dynamic PID adjusting technology - Google Patents
Carbon filter water quality advanced processing control method and device thereof based on dynamic PID adjusting technology Download PDFInfo
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Abstract
The invention relates to a carbon filter water quality advanced processing control method and a device thereof based on a dynamic PID adjusting technology. The method comprises following steps: sub PLCs of each filter grid automatically adjust the open degree of clean water valves to carry out constant water level filtration of filter grids; the main PLC automatically detects the filter time of each filter grid, automatically records the reverse washing period, after the reverse washing conditions are established, the main PLC assigns corresponding filter grids to enter the reverse washing process; sub PLCs complete the reverse washing process control under the coordination of the main PLC; and the main PLC completes the communications with a production monitoring computer. The device comprises a production monitoring computer, a main PLC, an exchange board, sub PLCs, controlled equipment, and a water level meter. Compared with the prior art, the device has the advantages that the device can improve the sufficient adsorption capacity of active carbon and improve the performance of a carbon filter and the like.
Description
Technical field
The present invention relates to a kind of carbon filter control method, especially relate to the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology and device.
Background technology
Along with the development of national economy, the raising of living standards of the people and the continuous progress of water technology, people are also more and more higher to the requirement of drinking-water quality.In the face of various organic pollutants, conventional water treatment process can not guarantee the requirement that drinking-water quality stably is up to state standards comprehensively.And the improvement of whole water environment pollution and water correction need long time, the treatment process that therefore improves water purification plant just seems particularly important.
The water quality advanced processing of carbon filter is the state-of-the-art technology of water factory's production technique, and its technique is to adopt " O3 contacted oxidation+biologic active carbon filtration " technological process to reach water quality advanced processing target, has represented the developing direction of city tap-water production technique.Because activated carbon filter still adopts water factory's V-type filter tank structure commonly used, therefore, on the technology controlling and process mode, general still according to the technology controlling and process mode of traditional sand filter.But, on the principle of water conditioning, activated carbon filter and common sand filter have essential difference: sand filter is by the current layer of sand of flowing through to the water conditioning principle, and the impurity in water is intercepted in layer of sand, and therefore, its water conditioning is a physical process.And activated carbon filter is while by current, flowing through active carbon layer, utilize the adsorption of gac, by the impurity absorption in water, to gac, its water conditioning is a chemical process.How making the control of activated carbon filter remain on the optimised process state is problem demanding prompt solution.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of water quality advanced process control method of the carbon filter based on the dynamic PID regulation technology and device that improves the abundant adsorptive power of gac and improve the carbon filter performance in order to overcome the defect that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
The water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology, the method comprises following step:
1) in filter tank, the sub-PLC of each filter grid regulates the purge valve aperture automatically, carries out the filter grid constant water level filtering;
2) main PLC detects the filtration time of each filter grid automatically, automatically records backwashing period, judges whether the back flushing condition is set up, if condition is set up, specifies corresponding filter grid to enter backwash process;
3) the sub-PLC of each filter grid reports real time execution operating mode separately to main PLC, and accepts the back flushing instruction that main PLC assigns, and completes the control of filter grid backwash process under the coordination of main PLC;
4) the sub-PLC of each filter grid carries out failure testing, fault alarm and fault protection to corresponding controlled plant;
5) main PLC monitors, dispatches blower unit, flushing pump group, has coordinated the backwash process of each filter grid;
6) main PLC monitors the pneumatics unit simultaneously, coordinates and starts valve, works in coordination with the valve opening of each filter grid and closes, and completes backwash process;
7) main PLC and production monitoring computer communicate, blower unit, flushing pump group, pneumatics unit and every lattice filter grid real time execution operating mode and production data are transferred to the production monitoring computer, accept steering order that the production monitoring computer assigns and the setting of processing parameter simultaneously, and carried out after judging its exactness, enforceability.
The concrete steps of described filter grid constant water level filtering are as follows:
11) water level gauge and pressure difference transmitter transmit filter grid water level and purge valve aperture signal to the sub-PLC of each filter grid;
12) water level that sub-PLC calculating receives and the deviation between designated water level, and, by after the pid control circuit computing in sub-PLC, output signal is sent to the output Attached Processor in sub-PLC;
13) the output Attached Processor is exported to purge valve after output signal processes, and regulates the purge valve aperture, carries out the filter grid constant water level filtering.
Described back flushing condition is set up and is referred to that filtration time surpasses 24 hours or main PLC receives mandatory requirement back flushing order.
Described step 4) controlled plant in comprises that water intaking valve, purge valve, water rush valve, gas rushes valve, wash water valve and vent valve.
Described backwash process concrete steps are as follows:
Preparatory stage: sub-PLC closes water intaking valve, opens wash water valve after accepting back flushing instruction that main PLC assigns, closes purge valve when the filter tank water surface is reduced to draining face again;
22) gas rushes the stage: main PLC starts a gas blower, and sub-PLC opens gas and rushes valve, and gas rushes 1.5-2.5min;
23) the combined water and air backwash stage: main PLC restarts a gas blower and a flushing pump, and sub-PLC fetches boiling water simultaneously and rushes valve and carry out combined water and air backwash, and the air water associating backwash time is 5.5-6.5min;
24) water rushes the stage: the main PLC unit that turns off the blast, and sub-PLC closes to hold one's breath and rushes valve, opens vent valve, and main PLC restarts a flushing pump and carries out the water flushing, and washing time is 4.5-5.5min;
25) stop the back flushing stage: sub-PLC closes water and rushes valve, and stops the flushing pump group;
26) recover filtration stage: sub-PLC first closes wash water valve and vent valve, then opens purge valve and water intaking valve and carries out automatic filtration.
A kind of device of the water quality advanced process control method of carbon filter based on the dynamic PID regulation technology, comprise production monitoring computer, main PLC, exchange board, sub-PLC, controlled plant and water level gauge, described production monitoring computer is connected with main PLC, described main PLC is connected with sub-PLC by exchange board, and described sub-PLC connects respectively controlled plant and water level gauge.
Also be connected with blower unit, flushing pump group and pneumatics unit on described main PLC.
Described sub-PLC is provided with a plurality of.
Compared with prior art, the present invention utilizes the regulation method of filter tank flowing water Valve, adopt the PID analytical model, the correlation parameter that keeps liquid level by detection of active carbon filtering pool discharge and filter tank, through calculating and contrast, to determine the current residence time of activated carbon filter, thereby reach the control purpose of the optimal adsorption efficiency of gac.The present invention is by the continuous online monitoring of liquid level and control valve opening, can be in time and reflect exactly the filtered water flow velocity in filter tank, determine best backwashing time, and greatly improved the water conditioning efficiency of activated carbon filter.
The accompanying drawing explanation
The schematic flow sheet that Fig. 1 is the inventive method;
The control flow schematic diagram that Fig. 2 is filter grid constant water level filtering of the present invention;
The structural representation that Fig. 3 is apparatus of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 1, the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology, the method comprises following step:
1) in filter tank, the sub-PLC of each filter grid regulates the purge valve aperture automatically, carries out the filter grid constant water level filtering, and as shown in Figure 2, the concrete steps of filter grid constant water level filtering are as follows:
11) water level gauge and pressure difference transmitter transmit filter grid water level and purge valve aperture signal to the sub-PLC of each filter grid;
12) water level that sub-PLC calculating receives and the deviation between designated water level, and, by after the pid control circuit computing in sub-PLC, output signal is sent to the output Attached Processor in sub-PLC;
13) the output Attached Processor is exported to purge valve after output signal processes, and regulates the purge valve aperture, carries out the filter grid constant water level filtering.
2) main PLC detects the filtration time of each filter grid automatically, automatically record backwashing period, judge whether the back flushing condition is set up, if condition is set up, specify corresponding filter grid to enter backwash process, the back flushing condition is set up and is referred to that filtration time surpasses 24 hours or main PLC receives mandatory requirement back flushing order;
3) the sub-PLC of each filter grid reports real time execution operating mode separately to main PLC, and accepts the back flushing instruction that main PLC assigns, and completes the control of filter grid backwash process under the coordination of main PLC;
4) the sub-PLC of each filter grid to corresponding water intaking valve, purge valve, water rush valve, gas rushes the controlled plants such as valve, wash water valve and vent valve and carries out failure testing, fault alarm and fault protection;
5) main PLC monitors, dispatches blower unit, flushing pump group, has coordinated the backwash process of each filter grid;
6) main PLC monitors the pneumatics unit simultaneously, coordinates and starts valve, works in coordination with the valve opening of each filter grid and closes, and completes backwash process;
7) main PLC and production monitoring computer communicate, blower unit, flushing pump group, pneumatics unit and every lattice filter grid real time execution operating mode and production data are transferred to the production monitoring computer, accept steering order that the production monitoring computer assigns and the setting of processing parameter simultaneously, and carried out after judging its exactness, enforceability.
Described backwash process concrete steps are as follows:
Preparatory stage: sub-PLC closes water intaking valve, opens wash water valve after accepting back flushing instruction that main PLC assigns, closes purge valve when the filter tank water surface is reduced to draining face again;
22) gas rushes the stage: main PLC starts a gas blower, and sub-PLC opens gas and rushes valve, and gas rushes 1.5min;
23) the combined water and air backwash stage: main PLC restarts a gas blower and a flushing pump, and sub-PLC fetches boiling water simultaneously and rushes valve and carry out combined water and air backwash, and the air water associating backwash time is 5.5min;
24) water rushes the stage: the main PLC unit that turns off the blast, and sub-PLC closes to hold one's breath and rushes valve, opens vent valve, and main PLC restarts a flushing pump and carries out the water flushing, and washing time is 4.5min;
25) stop the back flushing stage: sub-PLC closes water and rushes valve, and stops the flushing pump group;
26) recover filtration stage: sub-PLC first closes wash water valve and vent valve, then opens purge valve and water intaking valve and carries out automatic filtration.
As shown in Figure 3, a kind of device of implementing the above-mentioned water quality advanced process control method of carbon filter based on the dynamic PID regulation technology, comprise production monitoring computer 1, main PLC2, exchange board 3, some sub-PLC4, controlled plant and water level gauges 5, described production monitoring computer 1 is connected with main PLC2, described main PLC2 is connected with some sub-PLC4 respectively by exchange board 3, and described sub-PLC connects respectively controlled plant and water level gauge 5.Also be connected with blower unit, flushing pump group and pneumatics unit on described main PLC2.
Embodiment 2
Shown in Fig. 3, the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology and device, described method key step and device are with embodiment 1, and difference is, and the backwash process concrete steps in the present embodiment are as follows:
Preparatory stage: sub-PLC closes water intaking valve, opens wash water valve after accepting back flushing instruction that main PLC assigns, closes purge valve when the filter tank water surface is reduced to draining face again;
22) gas rushes the stage: main PLC starts a gas blower, and sub-PLC opens gas and rushes valve, and gas rushes 2.5min;
23) the combined water and air backwash stage: main PLC restarts a gas blower and a flushing pump, and sub-PLC fetches boiling water simultaneously and rushes valve and carry out combined water and air backwash, and the air water associating backwash time is 6.5min;
24) water rushes the stage: the main PLC unit that turns off the blast, and sub-PLC closes to hold one's breath and rushes valve, opens vent valve, and main PLC restarts a flushing pump and carries out the water flushing, and washing time is 5.5min;
25) stop the back flushing stage: sub-PLC closes water and rushes valve, and stops the flushing pump group;
26) recover filtration stage: sub-PLC first closes wash water valve and vent valve, then opens purge valve and water intaking valve and carries out automatic filtration.
Shown in Fig. 3, by the water quality advanced process control method of the carbon filter based on the dynamic PID regulation technology of the present invention and application of installation in source, Shanghai river factory advanced treatment system.
(1) purpose
Source river factory first phase water supply scale is 300,000 ton per days, for further improving effluent water quality, source river factory Water flow-path processed will rely on the effect of the strong adsorption to objectionable impurities of gac by carbon filter, water quality is carried out to advanced treatment, to making effluent water quality, reach the standard of tap water.
(2) system characteristics
Source river factory activated-carbon filter cell system comprises: rinse 6 gas blowers of pump house, 6 cover flushing pumps and 6 cover air compressor machines; 16 lattice V-type filter tanks.
air compression system automatically moves and keeps according to pressure limit;
Claims (8)
1. the water quality advanced process control method of the carbon filter based on the dynamic PID regulation technology, is characterized in that, the method comprises following step:
1) in filter tank, the sub-PLC of each filter grid regulates the purge valve aperture automatically, carries out the filter grid constant water level filtering;
2) main PLC detects the filtration time of each filter grid automatically, automatically records backwashing period, judges whether the back flushing condition is set up, if condition is set up, specifies corresponding filter grid to enter backwash process;
3) the sub-PLC of each filter grid reports real time execution operating mode separately to main PLC, and accepts the back flushing instruction that main PLC assigns, and completes the control of filter grid backwash process under the coordination of main PLC;
4) the sub-PLC of each filter grid carries out failure testing, fault alarm and fault protection to corresponding controlled plant;
5) main PLC monitors, dispatches blower unit, flushing pump group, has coordinated the backwash process of each filter grid;
6) main PLC monitors the pneumatics unit simultaneously, coordinates and starts valve, works in coordination with the valve opening of each filter grid and closes, and automatically completes backwash process;
7) main PLC and production monitoring computer communicate, blower unit, flushing pump group, pneumatics unit and every lattice filter grid real time execution operating mode and production data are transferred to the production monitoring computer, accept steering order that the production monitoring computer assigns and the setting of processing parameter simultaneously, and carried out after judging its exactness, enforceability.
2. the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology according to claim 1, is characterized in that, the concrete steps of described filter grid constant water level filtering are as follows:
11) water level gauge and pressure difference transmitter transmit filter grid water level and purge valve aperture signal to the sub-PLC of each filter grid;
12) water level that sub-PLC calculating receives and the deviation between designated water level, and, by after the pid control circuit computing in sub-PLC, output signal is sent to the output Attached Processor in sub-PLC;
13) the output Attached Processor is exported to purge valve after output signal processes, and regulates the purge valve aperture, carries out the filter grid constant water level filtering.
3. the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology according to claim 1, is characterized in that, described back flushing condition is set up and referred to that filtration time surpasses 24 hours or main PLC receives mandatory requirement back flushing order.
4. the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology according to claim 1, it is characterized in that, the controlled plant in described step 4) comprises that water intaking valve, purge valve, water rush valve, gas rushes valve, wash water valve and vent valve.
5. the water quality advanced process control method of a kind of carbon filter based on the dynamic PID regulation technology according to claim 4, is characterized in that, described backwash process concrete steps are as follows:
21) preparatory stage: sub-PLC closes water intaking valve, opens wash water valve after accepting back flushing instruction that main PLC assigns, closes purge valve when the filter tank water surface is reduced to draining face again;
22) gas rushes the stage: main PLC starts a gas blower, and sub-PLC opens gas and rushes valve, and gas rushes 1.5-2.5min;
23) the combined water and air backwash stage: main PLC restarts a gas blower and a flushing pump, and sub-PLC fetches boiling water simultaneously and rushes valve and carry out combined water and air backwash, and the air water associating backwash time is 5.5-6.5min;
24) water rushes the stage: the main PLC unit that turns off the blast, and sub-PLC closes to hold one's breath and rushes valve, opens vent valve, and main PLC restarts a flushing pump and carries out the water flushing, and washing time is 4.5-5.5min;
25) stop the back flushing stage: sub-PLC closes water and rushes valve, and stops the flushing pump group;
26) recover filtration stage: sub-PLC first closes wash water valve and vent valve, then opens purge valve and water intaking valve and carries out automatic filtration.
6. a device of implementing the water quality advanced process control method of carbon filter based on the dynamic PID regulation technology as claimed in claim 5, it is characterized in that, comprise production monitoring computer, main PLC, exchange board, sub-PLC, controlled plant and water level gauge, described production monitoring computer is connected with main PLC, described main PLC is connected with sub-PLC by exchange board, and described sub-PLC connects respectively controlled plant and water level gauge.
7. the device of a kind of water quality advanced process control method of carbon filter based on the dynamic PID regulation technology according to claim 6, is characterized in that, also is connected with blower unit, flushing pump group and pneumatics unit on described main PLC.
8. the device of a kind of water quality advanced process control method of carbon filter based on the dynamic PID regulation technology according to claim 6, is characterized in that, described sub-PLC is provided with a plurality of.
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| CN111308891A (en) * | 2020-02-28 | 2020-06-19 | 上海交通大学 | A kind of self-adaptive control method of water pressure of filter screen flushing unit of ballast water equipment |
| CN111320272A (en) * | 2020-04-02 | 2020-06-23 | 安徽华骐环保科技股份有限公司 | Multi-condition controlled automatic back-flushing device for denitrification biological filter and operation method thereof |
| CN112783080A (en) * | 2020-12-30 | 2021-05-11 | 上海远动科技有限公司 | Automatic control method for advanced treatment of water plant |
| CN115253484A (en) * | 2022-08-09 | 2022-11-01 | 北控水务(中国)投资有限公司 | Automatic control method of V-shaped filter device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111308891A (en) * | 2020-02-28 | 2020-06-19 | 上海交通大学 | A kind of self-adaptive control method of water pressure of filter screen flushing unit of ballast water equipment |
| CN111320272A (en) * | 2020-04-02 | 2020-06-23 | 安徽华骐环保科技股份有限公司 | Multi-condition controlled automatic back-flushing device for denitrification biological filter and operation method thereof |
| CN111320272B (en) * | 2020-04-02 | 2023-11-03 | 安徽华骐环保科技股份有限公司 | Operation method of automatic backwashing device of multi-condition controlled denitrification biological filter |
| CN112783080A (en) * | 2020-12-30 | 2021-05-11 | 上海远动科技有限公司 | Automatic control method for advanced treatment of water plant |
| CN115253484A (en) * | 2022-08-09 | 2022-11-01 | 北控水务(中国)投资有限公司 | Automatic control method of V-shaped filter device |
| CN115253484B (en) * | 2022-08-09 | 2023-08-11 | 北控水务(中国)投资有限公司 | Automatic control method of V-shaped filter tank device |
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