CN100593765C - Automatic control system of microwave sewage treating equipment - Google Patents
Automatic control system of microwave sewage treating equipment Download PDFInfo
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- CN100593765C CN100593765C CN200810094570A CN200810094570A CN100593765C CN 100593765 C CN100593765 C CN 100593765C CN 200810094570 A CN200810094570 A CN 200810094570A CN 200810094570 A CN200810094570 A CN 200810094570A CN 100593765 C CN100593765 C CN 100593765C
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Abstract
A system for controlling microwave sewage processing equipment automatically comprises a pH value detecting circuit for detecting the pH value of the sewage, a sewage flowmeter for detecting sewage flux, a programmable logic controller (PLC) which can respectively sends out an additive regulating directive signal and a flux control directive signal by a closed-loop control logic operation according to a detected sewage pH value signal and a sewage flux signal, an additive regulating device used for controlling the added amount of the additive according to the additive adding control directivesignal transmitted by the PLC and a sewage flux regulating device used for controlling the sewage flux according to the flux control directive signal. The system solves the technical problem of unstable matching of the pH value and the sewage flux of the microwave sewage processing system and the output power of the microwave.
Description
Technical field
The present invention relates to a kind of automatic control system of microwave sewage treating equipment.
Background technology
The research that microwave energy is applied to water treatment started from for the 1980's, had proposed multiple relevant technical solution so far.Wherein, one of the applicant just the patented claim in examination procedure define a kind of sewage disposal system, comprise a microwave reactor, its inside is provided with the water pipe of crossing that need dispose of sewage and pass through, and the microwave generator of launched microwave; Be arranged on the downstream of described microwave reactor, by the overanxious device of sedimentation that pipeline is connected with the sewage outlet of described microwave reactor, the overanxious device of described sedimentation is provided with clear water floss hole and mud discharging mouth; In the upstream of described microwave reactor, be provided with sensitizer stirred pot as the sensitizer adding set.Water treatment agent stirred pot as the adding set of the required various water treatment agents of water treatment is arranged between described microwave reactor and the described sensitizer adding set.Described microwave generator is made up of circuit and microwave components two parts.Circuit part comprises funtion parts compositions such as control circuit A4, B-power A5, filament supply A6, magnetic field power supply A3, microwave main line A1.In the microwave processing process of sewage, because influence of various factors usually, needs the output power of adjusting and controlled microwave pipe, satisfy the microwave power requirement in the microwave reaction system, to reach the purpose that sewage purification is handled.
Disclose a kind of magnetron control circuit of micro-wave oven among the Chinese patent literature CN1567115A, wherein on the control of microcomputer signal output part, be provided with the noise monitoring portion that the signal that comprises noise is monitored and prevented noise signal output.By utilizing by transistor, the noise monitoring portion that capacitor and resistance thereof constitute, and cut off the microcomputer control signal that includes noise, and can guarantee the stability of magnetron work, can improve the reliability of micro-wave oven overall performance.In addition, in Chinese patent literature CN1356499A, disclose a kind of micro-wave oven, comprised magnetron, the power unit of AC power is provided, and by the high-tension transformer that produces high pressure from the AC power of power unit; The power controller part is determining that the voltage that power unit provides is lower than under the predetermined permission lower voltage limit situation, and it interrupts the magnetron supply of electrical energy.Adopt this structure, the voltage that can avoid using is lower than the lower voltage limit of permission, can improve the stability of circuit in addition.
Above prior art is primarily aimed at the device that micro-wave oven is controlled the definite relatively object heated condition in position.But for microwave sewage treatment device, the sewage that microwave shone flow state in pipeline wherein.No matter above-mentioned prior art is the reason of having considered noise signal, and still voltage-controlled factor all only is a certain factor at the useful power labile factor that causes microwave action.This normally can meet the demands for the object heating that the position is determined relatively.And, then can not satisfy the requirement that reaches with stable treated effect qualified discharge far away for the microwave treatment of the sewage that is in flow state.
Because the above-mentioned complicacy of microwave wastewater treatment, in the prior art, the control of the output power of the microwave tube in the microwave water treatment facilities all is that on-site manual is regulated, can not guarantee the coupling between microwave power output and the water treatment demand like this, and the technical requirement height of adjusting operation, the manpower waste is big, also influences the stability of equipment simultaneously.In addition, from regulative mode, traditional control mode of past is just regulated microwave power output by controlling magnetic field electric current 1PA2 size.
In production practices, it is the pH value and the flow of sewage in microwave reactor of sewage to the principal element of wastewater treatment efficiency that the applicant finds to influence microwave.Wherein, the working environment influence causes detected pH value instability because the fluctuations in discharge of the pH value difference of sewage itself, sewage and medicine system are originally experienced.
Summary of the invention
For this reason, the problem that technical matters to be solved by this invention is proposes the stable control circuit that mates between a kind of automatic adjusting sewage PH value and the discharge of sewage and the microwave output power.
For solving the problems of the technologies described above, the automatic control system of microwave sewage treating equipment of the present invention comprises
The pH value testing circuit is used for detecting the pH value of the sewage of microwave reactor incoming flow;
Sewage flowmeter is used to detect the discharge of sewage;
Programmable Logic Controller (PLC) receives above-mentioned each detected signal, sends adjuvant regulating command signal according to the detected sewage PH value signal of described pH value testing circuit through the closed-loop control logical operation; And send the flow control command signal through the closed-loop control logical operation according to the detected discharge of sewage signal of described sewage flowmeter;
The adjuvant regulating device according to the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, is controlled the adjuvant addition;
Discharge of sewage regulating device according to the flow control command signal that described reception Programmable Logic Controller (PLC) sends, is controlled the discharge of sewage.
Described pH value testing circuit is made up of probe and transmission circuit, and described probe is used to survey the pH value of sewage, and described transmission circuit is used for the resulting conversion of signals of described probe detection is become to be suitable for the signal that described Programmable Logic Controller (PLC) receives and handles.
Described adjuvant regulating device comprises adjuvant frequency converter and adjuvant dosing pump, described adjuvant frequency converter receives the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, and according to the dose that adds of the described adjuvant dosing pump of described adjuvant regulating command signal controlling;
Described flow regulator comprises flow frequency converter and discharge of sewage pump, described flow frequency converter receives the flow control command signal that described Programmable Logic Controller (PLC) sends, and according to described flow control command signal so that the sewage transport flow of control discharge of sewage pump.
Described pH value testing circuit comprises that a probe is arranged on the sensitizer point of addition, is used for detecting the first pH value testing circuit of sensitizer at sewage content; Be arranged on the water treatment agent point of addition with a probe, be used for detecting the second pH value testing circuit of the water treatment agent content of sewage;
Described adjuvant frequency converter comprises that a sensitizer adds frequency converter, thus the addition of its control sensitizer dosing pump control sensitizer; An and water treatment agent interpolation frequency converter, thereby the addition of its control water treatment agent dosing pump control water treatment agent.
Wherein, the pH value of described sensitizer point of addition is controlled at 10-12, and the pH value of described water treatment agent point of addition is controlled at 6.5-9.
Described discharge of sewage regulating device comprises discharge of sewage frequency converter and discharge of sewage control pump, described discharge of sewage frequency converter receives the discharge of sewage control command signal that described Programmable Logic Controller (PLC) sends, and controls the operational throughput of described discharge of sewage control pump according to described discharge of sewage control command signal.
Described discharge of sewage amplitude of variation be controlled at set flow 5% in.Preferably be controlled in 1%.
Further, above-mentioned automatic control system also comprises the microwave source control circuit, and described microwave source control circuit comprises:
The filament current sensor is used to detect filament current;
The field supply sensor is used to detect field supply;
The anode of magnetron current sensor is used to detect the anode of magnetron electric current;
The anode of magnetron high pressure sensor;
Programmable Logic Controller (PLC) is accepted above-mentioned detection signal, sends regulating command through logical operation;
The magnetron heater adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated filament current automatically;
Magnetron magnetic field adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated field supply automatically.
According to magnetron transmit power curve figure, filament current and field supply are regulated the output power of controlling magnetron simultaneously.
The automatic control system of described microwave sewage treating equipment also comprises:
The automatic/hand switch is used for sending the instruction of automatic operational mode or the instruction of manual mode of operation to described Programmable Logic Controller (PLC).
Be provided with the fault alarm induction installation in each operation unit, described each fault alarm induction installation sends fault-signal to described Programmable Logic Controller (PLC) when experiencing fault, so that described programmable controller (PLC) sends alerting signal.
Described alerting signal control power switch cuts off microwave sewage disposal system power supply, stops the work of microwave sewage disposal system.
Technique scheme of the present invention has the following advantages compared to existing technology:
A. increase by three sensor 1PL1-1PL3 and two module 1TVI, 1TV2, big or small outer knob of microwave amount regulated, convenient and simple, modular design makes mode of operation more easy, processing safety improves greatly, the operator's console that the control mode of equipment is more traditional is simplified greatly, and artificial mode of operation is more directly perceived, and is easy.Simultaneously also shortened electrical connecting wires, both made things convenient for the daily servicing of equipment also to reduce breakdown rate, used more humane.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the structural representation block scheme of the automatic control system of microwave sewage treating equipment of the present invention;
Fig. 2 is the microwave generator main circuit schematic diagram in the automatic control system among Fig. 1;
Fig. 3 is the microwave generator control circuit schematic diagram in the automatic control system among Fig. 1;
Fig. 4 is system's control flow chart of the automatic control system of microwave sewage treating equipment of the present invention;
Fig. 5 is filament current adjustment curve figure;
Fig. 6 is field supply adjustment curve figure.
Embodiment
Referring to Fig. 1 to Fig. 3, the automatic control system of microwave sewage treating equipment of the present invention comprises the pH value testing circuit, is used for detecting the pH value of the sewage of microwave reactor incoming flow; Sewage flowmeter is used to detect the discharge of sewage; Programmable Logic Controller (PLC) receives above-mentioned each detected signal, sends adjuvant regulating command signal according to the detected sewage PH value signal of described pH value testing circuit through the closed-loop control logical operation; And send the flow control command signal through the closed-loop control logical operation according to the detected discharge of sewage signal of described sewage flowmeter; The adjuvant regulating device according to the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, is controlled the adjuvant addition; Discharge of sewage regulating device according to the flow control command signal that described reception Programmable Logic Controller (PLC) sends, is controlled the discharge of sewage.
Wherein, described pH value testing circuit is made up of probe and transmission circuit, described probe is used to survey the pH value of sewage, and described transmission circuit is used for the resulting conversion of signals of described probe detection is become to be suitable for the signal that described Programmable Logic Controller (PLC) receives and handles.Described adjuvant regulating device comprises adjuvant frequency converter and adjuvant dosing pump, described adjuvant frequency converter receives the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, and according to the dose that adds of the described adjuvant dosing pump of described adjuvant regulating command signal controlling; Described flow regulator comprises flow frequency converter and discharge of sewage pump, described flow frequency converter receives the flow control command signal that described Programmable Logic Controller (PLC) sends, and according to described flow control command signal so that the sewage transport flow of control discharge of sewage pump.
Described pH value testing circuit comprises that a probe is arranged on the sensitizer point of addition, is used for detecting the first pH value testing circuit of sensitizer at sewage content; Be arranged on the second pH value testing circuit that the water treatment agent point of addition is used for detecting the water treatment agent content of sewage with a probe; Described adjuvant frequency converter comprises that a sensitizer adds frequency converter, thus the addition of its control sensitizer dosing pump control sensitizer; An and water treatment agent interpolation frequency converter, thereby the addition of its control water treatment agent dosing pump control water treatment agent.Wherein, the pH value of described sensitizer point of addition is controlled at 10-12, and the pH value of described water treatment agent point of addition is controlled at 6.5-9.
Described discharge of sewage regulating device comprises discharge of sewage frequency converter and discharge of sewage control pump, described discharge of sewage frequency converter receives the discharge of sewage control command signal that described Programmable Logic Controller (PLC) sends, and controls the operational throughput of described discharge of sewage control pump according to described discharge of sewage control command signal.Described discharge of sewage amplitude of variation be controlled at set flow 5% in.
The automatic control system of described microwave sewage treating equipment also comprises the microwave source control circuit, and described microwave source control circuit comprises: the filament current sensor is used to detect filament current; The field supply sensor is used to detect field supply; The anode of magnetron current sensor is used to detect the anode of magnetron electric current; The anode of magnetron high pressure sensor; Programmable Logic Controller (PLC) is accepted the detection signal that above-mentioned filament current sensor, field supply sensor, anode of magnetron current sensor send, and sends regulating command through logical operation; The magnetron heater adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated filament current automatically; Magnetron magnetic field adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated field supply automatically.According to magnetron transmit power curve figure, filament current and field supply are regulated the output power of controlling magnetron simultaneously.
The automatic control system of described microwave sewage treating equipment also comprises the automatic/hand switch, is used for sending the instruction of automatic operational mode or the instruction of manual mode of operation to described Programmable Logic Controller (PLC).Be provided with the fault alarm induction installation in each operation unit, described each fault alarm induction installation sends fault-signal to described Programmable Logic Controller (PLC) when experiencing fault, so that described programmable controller (PLC) sends alerting signal.Described alerting signal control power switch cuts off microwave sewage disposal system power supply, stops the work of microwave sewage disposal system.
During work, referring to Fig. 4 to Fig. 6, feed sewage in sewage-treatment plant after, the described sewage flowmeter that is arranged in the described drainage flow pipeline is used for detecting the discharge of sewage of described pipeline, and will detect discharge of sewage signal conveys to described Programmable Logic Controller (PLC); The probe that is arranged on the sensitizer point of addition in the described first pH value testing circuit is used to detect the pH value of the sewage that flows through this position, and will detect the sewage PH value signal, is transported to described Programmable Logic Controller (PLC) after described transmission circuit conversion; And the probe that is arranged on the water treatment agent point of addition of the described second pH value testing circuit is used to detect the pH value of the sewage that flows through this position, and will detect the sewage PH value signal, is transported to described Programmable Logic Controller (PLC) after described transmission circuit conversion.
Described Programmable Logic Controller (PLC) is according to the sewage PH value signal of the discharge of sewage signal that receives and the output of the first pH value testing circuit, adds frequency converter to sensitizer and sends adjuvant regulating command signal at sensitizer; Thereby described sensitizer adds frequency converter according to the addition of controlling sensitizer at the adjuvant regulating command signal controlling sensitizer dosing pump of sensitizer.By such closed-loop control the pH value of described sensitizer point of addition is controlled at 10-12.
Described Programmable Logic Controller (PLC) is according to the sewage PH value signal of discharge of sewage signal that receives and the output of the second pH value testing circuit, add frequency converter to water treatment agent and send adjuvant regulating command signal, thereby described water treatment agent adds frequency converter according to the addition at the adjuvant regulating command signal controlling water treatment agent dosing pump control water treatment agent of water treatment agent at water treatment agent.By such closed-loop control the pH value of described water treatment agent point of addition is controlled at 6.5-9.
Described Programmable Logic Controller (PLC) sends discharge of sewage control command signal according to the described discharge of sewage frequency converter of discharge of sewage direction of signal that receives; Described discharge of sewage frequency converter is controlled the operational throughput of described discharge of sewage control pump according to discharge of sewage control command signal.By such closed-loop control with described discharge of sewage amplitude of variation be controlled at set flow 5% in.
After in sewage-treatment plant, feeding sewage, give the energising earlier of microwave source main line, i.e. L1, L2 on the microwave source connection terminal 1XT2, L3 energising.Then, the described automatic/hand switch on the microwave source control panel is set to automatic mode.At this moment, microwave source connection terminal 2XT1-4 is to described Programmable Logic Controller (PLC) output+24V voltage, and it is the auto state signal that described Programmable Logic Controller (PLC) is discerned this signal.Simultaneously, if microwave source connection terminal 2XT1-8 to described Programmable Logic Controller (PLC) output+24V voltage, it is anhydrous state that then described Programmable Logic Controller (PLC) is discerned this signal indicating microwave source cooling water system.At this moment need to open the microwave source cooling-water pump and feed recirculated water to described microwave source cooling water system.After the microwave source cooling water system fed recirculated water, the output voltage of described connection terminal 2XT1-8 was reduced to 0V, and it is described cooling water system water flowing state that described Programmable Logic Controller this moment (PLC) is discerned this signal.
When described Programmable Logic Controller (PLC) obtains described cooling water system that auto state signal that the described connection terminal 2XT1-4 of microwave source sends and described connection terminal 2XT1-8 send during the water flowing status signal, open low-voltage signal to switching relay output by described Programmable Logic Controller (PLC).Make the closed dry contact of described switching relay, connect connection terminal 2XT1-6 and connection terminal 2XT1-7, at this moment, relay K 2 is charged in the microwave source, and microwave source low pressure is started.At this moment, microwave source connection terminal 2XT1-9 sends low pressure indicating status signal to described Programmable Logic Controller (PLC).
After microwave source low pressure is started, filament current regulation voltage by a predetermined interval magnitude of voltage of described Programmable Logic Controller (PLC) output carries out the filament current adjusting, be sent to magnetron heater adjustment module 1TV1 by connection terminal 2XT1-15 and connection terminal 2XT1-16, the response current that the filament current of a corresponding electric current interval value of the corresponding output of described magnetron heater adjustment module 1TV1 is regulated is elementary to filament transformer, the secondary filament current that is input to magnetron heater of control filament transformer.Filament current sensor 1PL3 detects the changing value of filament current, and should be input to described Programmable Logic Controller (PLC) by microwave source connection terminal 2XT1-27 and connection terminal 2XT1-28 by detected current value signal, described Programmable Logic Controller (PLC) is controlled at described filament current in the predetermined numerical range according to the current signal that described filament current sensor 1PL3 detects, and forms closed-loop control thus.The corresponding relation of three kinds of signals is seen the filament current adjustment curve figure of Fig. 5, shows filament current from be preheating to the course of work, regulation voltage that described Programmable Logic Controller (PLC) sends and the corresponding relation of time.
After filament current is transferred to and is set the preset time (as 5 minutes) of delaying time after the preheat value.Starting field supply this moment regulates, export the field supply regulation voltage of a predetermined interval magnitude of voltage to magnetron magnetic field adjustment module 1TV2 by connection terminal 2XT1-17 and connection terminal 2XT1-18 by described Programmable Logic Controller (PLC), the response current that the field supply of a corresponding electric current interval value of corresponding described magnetron magnetic field adjustment module 1TV2 output is regulated is to the magnetic field primary, and the controlling magnetic field transformer secondary output is input to the field supply of the coil of magnetron external electric magnet.Field supply sensor 1PL2 detects the changing value of field supply value, and should be input to described Programmable Logic Controller (PLC) by microwave source connection terminal 2XT1-29 and connection terminal 2XT1-30 by detected current value signal, the field supply that described Programmable Logic Controller (PLC) detects according to described field supply sensor 1PL2 number is controlled at described field supply in the predetermined numerical range, forms closed-loop control thus.The corresponding relation of three kinds of signals is seen the field supply adjustment curve figure of Fig. 6, and wherein Fig. 6 shows from field supply by reconciling when adjusting back adjustment process regulation voltage that described Programmable Logic Controller (PLC) sends and the corresponding relation of time.
Field supply is transferred to the current value of magnetron by emission, behind the time-delay preset time (as 5 seconds).The coil 1K5 of magnetic field undercurrent relay arrives pickup value, the contact 1K5-2 adhesive of described undercurrent relay, send the voltage signal of the non-undercurrent state of expression magnetron to described Programmable Logic Controller (PLC) by microwave source connection terminal 2XT1-25, this moment, field supply was non-undercurrent state, was one of necessary condition of high voltage startup.
After being full of a certain amount of sewage in the circulating pipe in the described microwave reactor, send a switching value signal by an electromagnetic flowmeter that is arranged on the reactor water delivering orifice to described Programmable Logic Controller (PLC), described Programmable Logic Controller (PLC) receives this signal, according to the program setting, (PLC) sends the electromagnetic flowmeter control signal to described microwave generator by described Programmable Logic Controller.The relay 2K4 of described microwave generator receives this signal, and this moment, described relay 2K4 exported closure signal by its main line terminal 2K4-1 to described Programmable Logic Controller (PLC).This signal is one of necessary condition of high voltage startup.
After the microwave source shield door was closed, door switch/temperature switch was in operate as normal (closure) state.This signal is one of necessary condition of high voltage startup.
When described Programmable Logic Controller (PLC) was received above three high voltage startup conditioned signals simultaneously, opened high-voltage signal by described Programmable Logic Controller (PLC) to switching relay output this moment.Make the closed dry contact of described switching relay, connect connection terminal 2XT1-13 and connection terminal 2XT1-14, at this moment, the loop conducting of whole high voltage control.1K1 is charged for the high-voltage relay coil, causes switch 1K1-1,1K1-2,1K1-3 closure on the high tension power main wires road, makes the conducting of high tension power main wires road, makes magnetron add high pressure, and the microwave source high pressure starts.At this moment, microwave source connection terminal 2XT1-19 sends high pressure indicating status signal to described Programmable Logic Controller (PLC).
At this moment, microwave source main line high-voltage rectifying is open-minded, and the magnetron two ends have added high direct voltage.Anode of magnetron voltage sensor 1PV1 carries out high-pressure sampling to the magnetron two ends, when described magnetron both end voltage was the magnetron voltage range value of being scheduled to, described anode of magnetron voltage sensor 1PV1 was by the voltage signal of microwave source connection terminal 2XT1-33 to the corresponding interval value of described Programmable Logic Controller (PLC) output.When the voltage signal of the corresponding interval value that described programmable controller (PLC) receives reaches between wherein given zone, described programmable controller (PLC) readjustment field supply.Along with the reduction of field supply, anode current begins to occur.The beginning anode current is 0 in this process, by the readjustment field supply, makes anode current be raised to setting value gradually by 0.Described programmable controller this moment (PLC) readjustment filament current is to setting working value.This moment, the start process of microwave source was finished.
The anode current size is to determine the major parameter of microwave power size, needs stable microwave source output power in the microwave source operational process, is stabilized in setting value for making anode current, forms closed-loop control between field supply adjusting and the anode current feedback.This closed-loop control process can be sketched and be: (signal as 10～0V) is given magnetic field module 1TV2 to the field supply regulation voltage of Programmable Logic Controller (PLC) by a predetermined interval magnitude of voltage of terminal 2XT1-17 and terminal 2XT1-18 output, and the magnetic field module is sent the response current that the field supply of a corresponding electric current interval value is regulated accordingly; When field supply arrived setting value, anode current also arrived setting value; At this moment, anode current sensor 1PL1 sends feedback signal by terminal 2XT1-31 and terminal 2XT1-32 to described programmable controller (PLC).That is to say that when anode current is subjected to certain interference, not when setting value, described programmable controller (PLC) makes anode current be returned to setting value by regulating the size of field supply.The anode current adjustment curve is seen Fig. 3
Direct influence is arranged the stable serviceable life to magnetron of filament current working value, in the microwave source operational process, need filament current to be stabilized in working value, for making filament current be stabilized in working value, filament current is regulated and the filament current feedback forms closed-loop control (PID adjusting).
Alerting signal:
1, the alerting signal in the operational process:
(1), during the anode overcurrent, microwave generator by the connection terminal 2XT1-26 in the microwave to described Programmable Logic Controller (PLC) output anode overcurrent alarm voltage signal, described Programmable Logic Controller (PLC) cutoff high output automatically.Simultaneously, microwave generator inside also has interlock, the automatic cutoff high output of equipment.
(2), during lack of water, send the water flowing status signal to described Programmable Logic Controller (PLC), the automatic cutoff low output of equipment by connection terminal 2XT1-8.
2, no matter which kind of situation in service as long as have unusually, all should embody the output of reporting to the police in programming.And be out of order a little in interface display according to the microwave source analyses of Common failure that provides.Illustrated with literal or icon, like this, easy access.This designs for software program.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (13)
1. the automatic control system of a microwave sewage treating equipment is characterized in that: comprise
The pH value testing circuit is used for detecting the pH value of the sewage of microwave reactor incoming flow;
Sewage flowmeter is used to detect the discharge of sewage;
Programmable Logic Controller (PLC) receives above-mentioned each detected signal, sends adjuvant regulating command signal according to the detected sewage PH value signal of described pH value testing circuit through the closed-loop control logical operation; And send the flow control command signal through the closed-loop control logical operation according to the detected discharge of sewage signal of described sewage flowmeter;
The adjuvant regulating device according to the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, is controlled the adjuvant addition;
Discharge of sewage regulating device according to the flow control command signal that described reception Programmable Logic Controller (PLC) sends, is controlled the discharge of sewage.
2. the automatic control system of microwave sewage treating equipment according to claim 1, it is characterized in that: described pH value testing circuit is made up of probe and transmission circuit, described probe is used to survey the pH value of sewage, and described transmission circuit is used for the resulting conversion of signals of described probe detection is become to be suitable for the signal that described Programmable Logic Controller (PLC) receives and handles.
3. the automatic control system of microwave sewage treating equipment according to claim 2 is characterized in that:
Described adjuvant regulating device comprises adjuvant frequency converter and adjuvant dosing pump, described adjuvant frequency converter receives the adjuvant regulating command signal that described Programmable Logic Controller (PLC) sends, and according to the dose that adds of the described adjuvant dosing pump of described adjuvant regulating command signal controlling;
Described flow regulator comprises flow frequency converter and discharge of sewage pump, described flow frequency converter receives the flow control command signal that described Programmable Logic Controller (PLC) sends, and according to described flow control command signal so that the sewage transport flow of control discharge of sewage pump.
4. the automatic control system of microwave sewage treating equipment according to claim 3 is characterized in that:
Described pH value testing circuit comprises that a probe is arranged on the sensitizer point of addition, is used for detecting the first pH value testing circuit of sensitizer at sewage content; Be arranged on the water treatment agent point of addition with a probe, be used for detecting the second pH value testing circuit of the water treatment agent content of sewage;
Described adjuvant frequency converter comprises that a sensitizer adds frequency converter, thus the addition of its control sensitizer dosing pump control sensitizer; An and water treatment agent interpolation frequency converter, thereby the addition of its control water treatment agent dosing pump control water treatment agent.
5. the automatic control system of microwave sewage treating equipment according to claim 4, it is characterized in that: the pH value of described sensitizer point of addition is controlled at 10-12, and the pH value of described water treatment agent point of addition is controlled at 6.5-9.
6. the automatic control system of microwave sewage treating equipment according to claim 1, it is characterized in that: described discharge of sewage regulating device comprises discharge of sewage frequency converter and discharge of sewage control pump, described discharge of sewage frequency converter receives the discharge of sewage control command signal that described Programmable Logic Controller (PLC) sends, and controls the operational throughput of described discharge of sewage control pump according to described discharge of sewage control command signal.
7. the automatic control system of microwave sewage treating equipment according to claim 6 is characterized in that: described discharge of sewage amplitude of variation be controlled at set flow 5% in.
8. the automatic control system of microwave sewage treating equipment according to claim 7 is characterized in that: described discharge of sewage amplitude of variation be controlled at set flow 1% in.
9. the automatic control system of microwave sewage treating equipment according to claim 1, it is characterized in that: also comprise the microwave source control circuit, described microwave source control circuit comprises:
The filament current sensor is used to detect filament current;
The field supply sensor is used to detect field supply;
The anode of magnetron current sensor is used to detect the anode of magnetron electric current;
The anode of magnetron high pressure sensor;
Programmable Logic Controller (PLC) is accepted above-mentioned detection signal, sends regulating command through logical operation;
The magnetron heater adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated filament current automatically;
Magnetron magnetic field adjustment module is accepted the regulating command that Programmable Logic Controller (PLC) sends, and the output control signal is regulated field supply automatically.
10. the automatic control system of microwave sewage treating equipment according to claim 9 is characterized in that: according to magnetron transmit power curve figure, filament current and field supply are regulated the output power of controlling magnetron simultaneously.
11. the automatic control system of microwave sewage treating equipment according to claim 1 is characterized in that: also comprise:
The automatic/hand switch is used for sending the instruction of automatic operational mode or the instruction of manual mode of operation to described Programmable Logic Controller (PLC).
12. the automatic control system of microwave sewage treating equipment according to claim 1, it is characterized in that: be provided with the fault alarm induction installation in each operation unit, described each fault alarm induction installation sends fault-signal to described Programmable Logic Controller (PLC) when experiencing fault, so that described programmable controller (PLC) sends alerting signal.
13. the automatic control system of microwave sewage treating equipment according to claim 12 is characterized in that: described alerting signal control power switch cuts off microwave sewage disposal system power supply, stops the work of microwave sewage disposal system.
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| CN103713664B (en) * | 2013-12-18 | 2016-02-03 | 长沙中联重科环卫机械有限公司 | Sewage treatment control method, device, system and sewage treatment facility |
| CN104062572B (en) * | 2014-06-09 | 2016-09-07 | 青岛东方循环能源有限公司 | A kind of online fault detection method of magnetron |
| CN104571255B (en) * | 2014-12-02 | 2017-05-31 | 北京长峰广播通讯设备有限责任公司 | The power control system and method in a kind of industrial microwave source |
| CN104944644A (en) * | 2015-06-29 | 2015-09-30 | 江西稀有稀土金属钨业集团有限公司 | Comprehensive treatment method for tungsten smelting wastewater |
| CN105236625A (en) * | 2015-11-11 | 2016-01-13 | 苏州市环境保护有限公司 | Fenton printing-dyeing-wastewater deep treatment method |
| CN106007287A (en) * | 2016-07-13 | 2016-10-12 | 无锡派乐科技有限公司 | Microwave-type sludge treatment device |
| CN106227137A (en) * | 2016-07-25 | 2016-12-14 | 成都东创精英科技有限公司 | A kind of linear amplification type sewage treatment control system |
| CN106292756B (en) * | 2016-08-29 | 2019-01-18 | 航天长城节能环保科技有限公司 | Sewage treatment control system for adding drugs |
| CN106378020B (en) * | 2016-11-23 | 2020-02-07 | 沐康源科技（北京）有限公司 | Control method, device and system for preparing mixed liquid |
| CN112794398A (en) * | 2019-10-28 | 2021-05-14 | 陕西青朗万城环保科技有限公司 | Control system of intermittent microwave induced oxidation organic wastewater treatment device |
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2008
- 2008-05-14 CN CN200810094570A patent/CN100593765C/en active Active
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