CN102863077A - Automatic monitoring system for treatment of papermaking sewage with activated sludge process and control method thereof - Google Patents
Automatic monitoring system for treatment of papermaking sewage with activated sludge process and control method thereof Download PDFInfo
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- CN102863077A CN102863077A CN2012103057873A CN201210305787A CN102863077A CN 102863077 A CN102863077 A CN 102863077A CN 2012103057873 A CN2012103057873 A CN 2012103057873A CN 201210305787 A CN201210305787 A CN 201210305787A CN 102863077 A CN102863077 A CN 102863077A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses an automatic monitoring system for treatment of papermaking sewage with an activated sludge process. The automatic monitoring system comprises an industrial computer, a PLC (Programmable Logic Controller), analog input equipment, analog output equipment, a frequency converter, an air compressor, a pump N, a pump P, a water inlet pump, a sludge pump and a water outlet pump. A control method of the automatic monitoring system comprises the following steps of: (1) running the system, starting the frequency converter and the air compressor if a manual aeration signal is transmitted, aerating the papermaking sewage through the air compressor, stopping aeration if an aeration stop signal is transmitted, and returning and continually aerating if an aeration stop signal is not transmitted; and (2) if a manual aeration signal is not transmitted, starting an automatic aeration control strategy, automatically starting the frequency converter and the air compressor, aerating the papermaking sewage through the air compressor, and stopping aeration after sewage treatment. According to the invention, the reaction start point and end point of the automatic monitoring system for the treatment of the papermaking sewage with the activated sludge process are controlled in a man-machine interaction way through an upper computer, so that a stable and reliable papermaking sewage treatment effect is achieved, and automatic control over a papermaking sewage treatment reaction process is realized.
Description
Technical field
The present invention relates to a kind of automatic monitoring on line system and control method thereof, especially a kind of papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system and control method thereof belong to the automatic control technology field.
Background technology
At present; in paper making process; usually can produce a large amount of waste water; based on environmental protection and energy-conservation consideration; the emphasis that those skilled in the art study with the paper waste recycle how; and the processing of paper-making industrial waste water should focus on the raising cyclic utilization rate, reduces water consumption and wastewater discharge, also should try to explore various reliable, economical and can take full advantage of the processing mode of useful resources in the waste water simultaneously.Therefore, effectively papermaking sewage treatment system seems particularly important.
The major function of papermaking sewage treatment system is the cleaning action of finishing papermaking wastewater, makes treated papermaking wastewater can reach the sewage drainage standard of national regulation.But the problems such as for a long time, the development of sewage disposal technology still far lags behind the needs of Paper Industry Development, and the sewage disposal device operation factor is low, and sewage treating efficiency is poor affect the development of paper industry always.If can reduce the working cost of saving Sewage by effective automatic control technology, will bring considerable economic benefit, therefore, realize the automatization of sewage treatment process, be the inexorable trend of sewage disposal development.
Summary of the invention
Purpose of the present invention is in order to solve the defective of above-mentioned prior art, provide a kind of can on-line monitoring, the automatic papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system of control.
Another object of the present invention is to provide a kind of control method of papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system.
Purpose of the present invention can reach by taking following technical scheme:
Papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system is characterized in that: comprise industrial computer, PLC controller, simulation imput device, simulation output equipment, frequency transformer, the air compressor machine that is connected with frequency transformer, the N pump that is arranged on input channel, P pump and intake pump and be arranged on the sludge pump of output channel and go out water pump; Described industrial computer is connected with the PLC controller signals, described PLC controller is connected with simulation imput device, simulation output equipment signal, described simulation imput device is connected with DO sensor, pH sensor, ORP sensor, liquid level sensor signal, described simulation output equipment with N pump, P pump, intake pump, sludge pump, go out water pump, the frequency transformer signal is connected.
As a kind of preferred version, between input channel and output channel, be provided with the sbr reactor device, be provided with aeration head and agitator in the described sbr reactor device, described frequency transformer, air compressor machine are connected with aeration head and are connected; Described DO sensor, pH sensor, ORP sensor and liquid level sensor are arranged in the sbr reactor device.
As a kind of preferred version, between described aeration head and air compressor machine, be provided with under meter.
As a kind of preferred version, described PLC controller is connected with digital output equipment, described digital output equipment and N pump, P pump, intake pump, sludge pump, goes out water pump, frequency transformer, agitator signal and is connected.
As a kind of preferred version, described sbr reactor device is the place of papermaking wastewater biochemical reaction, and its capacity is 50L.
As a kind of preferred version, described industrial computer model is for grinding magnificent 610L.
As a kind of preferred version, described PLC controller model is siemens S7-200.
As a kind of preferred version, described simulation imput device is siemens EM231.
As a kind of preferred version, described simulation output equipment is comprised of the siemens EM232 of three parallel connections, first EM232 is connected with N pump, P pump signal, and second EM232 is connected with intake pump, sludge pump signal, the 3rd EM232 with go out water pump, the frequency transformer signal is connected.
As a kind of preferred version, described N pump, P pump, intake pump, sludge pump, to go out water pump be peristaltic pump.
The control method of papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system is characterized in that may further comprise the steps:
1) operation papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system has manual aeration signal, performing step 2 if detect); If detect without manual aeration signal, performing step 3);
2) start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, if detect afterwards the aeration stop signal is arranged, then stop aeration; If detect without the aeration stop signal, then return the continuation aeration;
3) start the aeration Automatic Control Strategy, automatically start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, stop aeration after sewage disposal is finished.
As a kind of preferred version, described papermaking wastewater is the synthetic sewage in laboratory or the actual papermaking wastewater that enters the sbr reactor device.
The present invention has following beneficial effect with respect to prior art:
1, the present invention is based on the activated sludge method processing technique of papermaking wastewater, developed papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system, adopt the system layer control texture, grind magnificent 610L industrial computer as upper computer take one, utilize " KingView 6.53 " version software exploitation man-machine interface, with the CPU224 of Siemens S7-200PLC as lower computer, utilize the STEP7-Micro/WIN programming, adopt EM231, EM232 is as analog input module and output module, designed a cover papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system, realized each pump, the DO(dissolved oxygen) value, the pH(potential of hydrogen) value, the ORP(redox potential) value and the isoparametric on-line monitoring of liquid level, automatically control, the functions such as data-base recording enquire, utilize the mode of upper computer human-computer interaction that papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system is carried out reaction starting point and terminal point control, obtain reliable and stable Sewage effect, realize the automatic control of Sewage reaction process.
2, the present invention utilizes common switch-control strategy, and the PLC controller is controlled by DO sensor, frequency transformer and the air compressor machine DO to sewage in the sbr reactor device; Utilize the PID control strategy, the PLC controller is controlled by DO sensor, frequency transformer and the air compressor machine DO to sewage in the sbr reactor device; Utilize fuzzy control strategy, the PLC controller is controlled by DO sensor, frequency transformer and the air compressor machine DO to sewage in the sbr reactor device, wherein, the optimization modification of fuzzy control strategy: the use of subsection fuzzy control strategy and compound fuzzy control strategy, improved stability and the accuracy of control.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is control flow block diagram of the present invention.
Fig. 3 control that to be the present invention adopt compound fuzzy control strategy to synthetic sewage is figure as a result.
Fig. 4 control that to be the present invention adopt the subsection fuzzy control strategy to papermaking wastewater is figure as a result.
Embodiment
Embodiment 1:
As shown in Figure 1, the present embodiment comprises industrial computer, PLC controller, simulation imput device, simulation output equipment, digital output equipment, N pump, P pump, intake pump, sludge pump, goes out water pump, frequency transformer and air compressor machine, described N pump, P pump and intake pump are arranged on the input channel, described sludge pump and go out water pump and be arranged on the output channel, between input channel and output channel, be provided with the sbr reactor device, be provided with aeration head and agitator in the described sbr reactor device; Described industrial computer is connected with the PLC controller signals, described PLC controller is connected with simulation imput device, simulation output equipment, digital output equipment signal, described simulation imput device is connected with DO sensor, pH sensor, ORP sensor, liquid level sensor signal, described simulation output equipment with N pump, P pump, intake pump, sludge pump, go out water pump, the frequency transformer signal is connected, described digital output equipment and N pump, P pump, intake pump, sludge pump, go out water pump, frequency transformer, agitator signal and be connected; Described DO sensor, pH sensor, ORP sensor and liquid level sensor are arranged in the sbr reactor device, and described frequency transformer, air compressor machine are connected with aeration head and are connected, and are provided with under meter between described air compressor machine and aeration head.
In the present embodiment, described sbr reactor device is the place of papermaking wastewater biochemical reaction, and its capacity is 50L.Described industrial computer model is for grinding magnificent 610L.Described PLC controller model is siemens S7-200.Described simulation imput device is siemens EM231.Described simulation output equipment is comprised of the siemens EM232 of three parallel connections, and first EM232 is connected with N pump, P pump signal, and second EM232 is connected with intake pump, sludge pump signal, the 3rd EM232 with go out water pump, the frequency transformer signal is connected.Described N pump, P pump, intake pump, sludge pump, to go out water pump be peristaltic pump.
Processing about sewage and active sludge: startup N pump and P pump add respectively nutritive element N(nitrogen) and P(phosphorus), by pipeline nutritive element N and P are transported to the sbr reactor device, start intake pump, by pipeline papermaking wastewater is transported to the sbr reactor device; Unnecessary active sludge was discharged by sludge pump after the sbr reactor device was finished and processed, and the sewage that the sbr reactor device is handled is discharged by wet-pit.
The control method of the present embodiment is as follows:
As shown in Figure 2, may further comprise the steps: 1) operation papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system has manual aeration signal, performing step 2 if detect); If detect without manual aeration signal, performing step 3); 2) start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, if detect afterwards the aeration stop signal is arranged, then stop aeration; If detect without the aeration stop signal, then return the continuation aeration; 3) start the aeration Automatic Control Strategy, automatically start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, stop aeration after sewage disposal is finished.
Application example 1:
Preparation synthetic sewage in laboratory makes its COD value be in 300～330mg/L, and ammonia nitrogen concentration is 40～45mg/L, and the P concentration of element is 4.5～5.0mg/L, and basicity is 400～450mg/L.
To above-mentioned sewage, utilize the papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system of embodiment 1, the set(ting)value of DO is decided to be 2.0mg/L, manually moment adds the above-mentioned synthetic sewage of 8L; Utilize the human-computer interaction interface Controlling System of upper computer to start, and move continuously 120 minutes, during the DO in the whole reaction process is implemented the various control strategy.Wherein adopt the effect of compound fuzzy control strategy best, its control effect is: the rise time is that 3.5 minutes, overshoot are 5.5%, mean value is that 2.01mg/L, maximum value are that 2.14mg/L, minimum value are that 1.87mg/L, standard variance are 0.05, total aeration rate is 1840L, and the control result as shown in Figure 3.
Application example 2:
Secondary fiber papermaking factory of Guangzhou paper plant sewage treatment plant enter papermaking wastewater in the bilge main before the sbr reactor device.This COD of sewage is 1195mg/L, presses COD:N:P=230:5:1 configuration N, P solution, and with this papermaking wastewater through being cooled to room temperature.
To above-mentioned sewage, utilize the papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system of embodiment 1, the set(ting)value of DO is decided to be 2.0mg/L; Utilize the human-computer interaction interface Controlling System of upper computer to start, and move continuously totally 720 minutes 2 sbr reactor cycles.At a SBR in the cycle, according to the program start order: start first N pump and P pump and add the adequate nutrition element; Add the 3L papermaking wastewater 40 minutes fill phase; During 40 minutes to 220 minutes, control frequency transformer output frequency, thus the aeration rate of control air compressor machine is with control Dissolved Oxygen in Water concentration; During 220 minutes to 230 minutes, the stirring of control agitator makes the mud position even; Be subsidence stage during 230 minutes to 300 minutes, mud sinks, and water quality is gradually limpid; During 295 minutes to 305 minutes, the control sludge pump, the MLSS of water body fluctuates up and down at 2.0g/L during spoil disposal; During 300 minutes to 360 minutes, discharge the water purification 3L through the activated sludge process biochemical treatment.In treating processes, the DO in the whole reaction process is implemented multiple Automatic Control Strategy, wherein adopt the effect of subsection fuzzy control strategy best, its control effect is: the rise time is that 69 minutes, mean value are that 2.001mg/L, maximum value are that 2.06mg/L, minimum value are that 1.9mg/L, standard variance are 0.0233, total aeration rate is 3744L, and the control result as shown in Figure 4.
The above; it only is the preferred embodiment of the invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in scope disclosed in this invention; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all belonged to protection scope of the present invention.
Claims (10)
1. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system is characterized in that: comprise industrial computer, PLC controller, simulation imput device, simulation output equipment, frequency transformer, the air compressor machine that is connected with frequency transformer, the N pump that is arranged on input channel, P pump and intake pump and be arranged on the sludge pump of output channel and go out water pump; Described industrial computer is connected with the PLC controller signals, described PLC controller is connected with simulation imput device, simulation output equipment signal, described simulation imput device is connected with DO sensor, pH sensor, ORP sensor, liquid level sensor signal, described simulation output equipment with N pump, P pump, intake pump, sludge pump, go out water pump, the frequency transformer signal is connected.
2. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 1, it is characterized in that: between input channel and output channel, be provided with the sbr reactor device, be provided with aeration head and agitator in the described sbr reactor device, described frequency transformer, air compressor machine are connected with aeration head and are connected; Described DO sensor, pH sensor, ORP sensor and liquid level sensor are arranged in the sbr reactor device.
3. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 2 is characterized in that: be provided with under meter between described aeration head and air compressor machine.
4. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 2, it is characterized in that: described PLC controller is connected with digital output equipment, described digital output equipment and N pump, P pump, intake pump, sludge pump, goes out water pump, frequency transformer, agitator signal and is connected.
5. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 2, it is characterized in that: described sbr reactor device is the place of papermaking wastewater biochemical reaction, its capacity is 50L.
6. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 1, it is characterized in that: described industrial computer model is for grinding magnificent 610L; Described PLC controller model is siemens S7-200; Described simulation imput device is siemens EM231.
7. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 1, it is characterized in that: described simulation output equipment is comprised of the siemens EM232 of three parallel connections, first EM232 is connected with N pump, P pump signal, second EM232 is connected with intake pump, sludge pump signal, the 3rd EM232 with go out water pump, the frequency transformer signal is connected.
8. papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 1 is characterized in that: described N pump, P pump, intake pump, sludge pump, to go out water pump be peristaltic pump.
9. based on the control method of the described papermaking wastewater Wastewater Treated by Activated Sludge Process of claim 1 automatic monitored control system, it is characterized in that may further comprise the steps:
1) operation papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system has manual aeration signal, performing step 2 if detect); If detect without manual aeration signal, performing step 3);
2) start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, if detect afterwards the aeration stop signal is arranged, then stop aeration; If detect without the aeration stop signal, then return the continuation aeration;
3) start the aeration Automatic Control Strategy, automatically start frequency transformer and air compressor machine, by air compressor machine papermaking wastewater is carried out aeration to obtain enough DO, stop aeration after sewage disposal is finished.
10. the control method of papermaking wastewater Wastewater Treated by Activated Sludge Process automatic monitored control system according to claim 9 is characterized in that: described papermaking wastewater is the synthetic sewage in laboratory or the actual papermaking wastewater that enters the sbr reactor device.
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Cited By (2)
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| CN104045159A (en) * | 2014-07-09 | 2014-09-17 | 南京师范大学 | Pulse aerating and denitrifying method of full mixing aeration tank |
| CN107285460A (en) * | 2017-08-21 | 2017-10-24 | 梧州学院 | Household domestic sewage treating method and its system based on PLC and SBR |
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Application publication date: 20130109 |