CN104808574A - Signal amplification type PLC flue gas desulfurization control system - Google Patents
Signal amplification type PLC flue gas desulfurization control system Download PDFInfo
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- CN104808574A CN104808574A CN201510191783.0A CN201510191783A CN104808574A CN 104808574 A CN104808574 A CN 104808574A CN 201510191783 A CN201510191783 A CN 201510191783A CN 104808574 A CN104808574 A CN 104808574A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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Abstract
The invention discloses a signal amplification type PLC flue gas desulfurization control system. The signal amplification type PLC flue gas desulfurization control system mainly comprises a desulfurization device (1), and is characterized by further comprising a starting and shutdown circuit (7), a PLC (2), an industrial control upper computer (3), a signal processing module (4), a signal acquiring device (5), a displayer (6), a warning circuit (8), a power circuit (9) and a UPS module (10), wherein the starting and shutdown circuit (7) is connected with the desulfurization device (1), the PLC (2) is connected with the starting and shutdown circuit (7), the industrial control upper computer (3) and the signal processing module (4) are connected with the PLC (2), the signal acquiring device (5) is connected with the signal processing module (4), the displayer (6), the warning circuit (8) and the power circuit (9) are connected with the PLC (2), and the UPS module (10) is connected with the power circuit (9). According to the signal amplification type PLC flue gas desulfurization control system, acquired sulfur dioxide concentration signals can be processed, and signals received by the PLC can be more real, so that the PLC conveniently conducts accurate control over the desulfurization device.
Description
Technical field
The present invention relates to flue gas desulfurization field, specifically refer to a kind of signal amplifying type PLC flue gas desulfurization control system.
Background technology
Coal is as the important disposable energy of China, account for more than 70% of AND ENERGY RESOURCES CONSUMPTION IN CHINA amount, but owing to containing a large amount of sulphur in coal, sulphuric dioxide can be generated in burning, and be discharged in air, form large area acid rain, acid rain can make that forest is withered, soil acidification, crop production reduction, many hydrobionts disappear, buildings is corroded, and cause high risks to human being's production, life.Therefore, enter the content of sulphuric dioxide in air when controlling coal burning, be solve Acid Rain Pollution the most at all, the most direct approach.China just starts as far back as 20 century 70s the research carrying out flue gas desulfurization technique, but along with the develop rapidly of China's industry, the discharge capacity of sulphuric dioxide also constantly increases along with increasing progressively of installed capacity, and this has higher requirement to desulfur technology.In order to the develop rapidly of satisfied industry, Desulfurization Control Systems then seems by for important as the electric control system of commander and the operation of management and control sweetener.But traditional Desulfurization Control Systems it is inaccurate to the detection of sulfur dioxide concentration, cause it to control desulphurization system as required, affect desulfurized effect.
Summary of the invention
The object of the invention is to solve current used Desulfurization Control Systems and inaccurate defect is detected to sulfur dioxide concentration, a kind of signal amplifying type PLC flue gas desulfurization control system is provided.
Object of the present invention is by following technical proposals reality: a kind of signal amplifying type PLC flue gas desulfurization control system, mainly comprise sweetener, also comprise the switching on/off circuit be connected with sweetener, the PLC be connected with switching on/off circuit, the industry control host computer be connected with PLC and signal processing module, the signal picker be connected with signal processing module, the display be connected with PLC respectively, warning circuit and power circuit, and the UPS module be connected with power circuit; Described signal processing module is then by transformer T2, be arranged on telefault L3 and the telefault L4 on the former limit of transformer T2, be arranged on the telefault L5 of transformer T2 secondary, the current rectifying and wave filtering circuit be connected with telefault L3, the front end transforming circuit be connected with current rectifying and wave filtering circuit, the driving circuit be connected with telefault L4 and current rectifying and wave filtering circuit, the Sheffer stroke gate trigger circuit be connected with telefault L5, and the two-stage amplifying circuit be connected with Sheffer stroke gate trigger circuit and driving circuit forms.
Further, described front end transforming circuit comprises transformer T1, polar capacitor C1, bi-directional voltage stabilizing diode D1; The positive pole of described polar capacitor C1 is connected with the Same Name of Ends of transformer T1 former limit telefault L1, negative pole is connected with the non-same polarity of transformer T1 secondary inductance coil L2, bi-directional voltage stabilizing diode D1 is then in parallel with polar capacitor C1, and the non-same polarity of described transformer T1 former limit telefault L1 is all connected with current rectifying and wave filtering circuit with the Same Name of Ends of transformer T1 secondary inductance coil L2.
Described current rectifying and wave filtering circuit comprises diode bridge rectifier U, resistance R6, polar capacitor C3, diode D6; The input end of described diode bridge rectifier U respectively with the non-same polarity of transformer T1 former limit telefault L1 and transformer T1 secondary inductance coil L2 Same Name of Ends is connected, its cathode output end is connected with the Same Name of Ends of telefault L3, cathode output end is then connected with the Same Name of Ends of telefault L4; The positive pole of polar capacitor C3 is connected with the cathode output end of diode bridge rectifier U, its negative pole is then connected with the N pole of diode D6, resistance R6 is then in parallel with polar capacitor C3, the P pole of described diode D6 is connected with driving circuit, and the non-same polarity of described telefault L3 is connected with the P pole of diode D6.
Described driving circuit is by driving chip U1, field effect transistor MOS, N pole is connected with the grid of field effect transistor MOS, the diode D2 that P pole is connected with the CS1 pin of driving chip U1, one end is connected with the N pole of diode D2, the resistance R1 that the other end is connected with the GATE pin of driving chip U1, P pole is connected with the Same Name of Ends of transformer T1 secondary inductance coil L2, the diode D3 that N pole is then connected with the VIN pin of driving chip U1 after resistance R2, positive pole is connected with the Same Name of Ends of telefault L4, the polar capacitor C2 that negative pole is connected with two-stage amplifying circuit, one end is connected with the PW pin of driving chip U1, the resistance R4 that the other end is connected with the negative pole of polar capacitor C2, be serially connected in the resistance R3 between the CS2 pin of driving chip U1 and REF pin, and N pole is connected with the non-same polarity of telefault L4, the diode D5 that P pole is then connected with the REF pin of driving chip U1 after voltage stabilizing diode D4 through resistance R5 in turn forms, the drain electrode of described field effect transistor MOS is connected with the P pole of diode D6, source electrode is then connected with the VDD pin of driving chip U1, the GND pin ground connection of described driving chip U1.
Described two-stage amplifying circuit is by amplifier P1, amplifier P2, triode VT1, the resistance R7 that one end is connected with Sheffer stroke gate trigger circuit, the other end is connected with the output terminal of amplifier P1, be serially connected in the resistance R8 between the positive pole of amplifier P1 and output terminal, P pole is connected with Sheffer stroke gate trigger circuit with the negative pole of polar capacitor C2 respectively, diode D7 that N pole is connected with the positive pole of amplifier P2 forms; The emitter of described triode VT1 is connected with Sheffer stroke gate trigger circuit, grounded collector, base stage are then connected with the positive pole of amplifier P1, and the output terminal of described amplifier P2 is connected with the output terminal of amplifier P1, negative pole is connected with the negative pole of amplifier P1 and the P pole of diode D7 respectively.
Described Sheffer stroke gate trigger circuit are by triode VT2, unidirectional thyristor D9, Sheffer stroke gate A1, Sheffer stroke gate A2, positive pole is connected with the non-same polarity of telefault L5, the polar capacitor C4 that negative pole is then connected with the output terminal of amplifier P1 after resistance R7, the resistance R9 be in parallel with polar capacitor C4, negative pole is connected with the negative pole of polar capacitor C4, the polar capacitor C5 that positive pole is connected with the base stage of triode VT2, N pole is connected with the emitter of triode VT1, the diode D8 that P pole is connected with the emitter of triode VT2, be serially connected in the resistance R11 between the positive pole of Sheffer stroke gate A1 and output terminal, one end is connected with the output terminal of Sheffer stroke gate A1, the resistance R10 that the other end is connected with the control pole of unidirectional thyristor D9, and positive pole is connected with the control pole of unidirectional thyristor D9, the polar capacitor C6 that negative pole is connected with the N pole of diode D8 forms, the described collector of triode VT2 is connected with the positive pole of Sheffer stroke gate A1, the N pole of unidirectional thyristor D9 is connected with the output terminal of Sheffer stroke gate A1, P pole is then connected with the N pole of diode D8 with the P pole of diode D7 respectively, minus earth, the positive pole of Sheffer stroke gate A1 are connected with the non-same polarity of telefault L5, its output terminal is connected with the negative pole of Sheffer stroke gate A2, the plus earth of Sheffer stroke gate A2, the Same Name of Ends of described telefault L5 is connected with the N pole of diode D8.
For guaranteeing result of use of the present invention, this driving chip U1 preferentially adopts AT9933 integrated circuit to realize.
The present invention compared with prior art has the following advantages and beneficial effect:
1, the present invention can process the sulfur dioxide concentration signal collected, and makes the signal received by PLC truer, is convenient to PLC and controls accurately sweetener.
2, signal picker of the present invention is highly sensitive, is swift in response, and improves the efficiency of Desulfurization Control Systems.
3, the present invention is easy to operate, and antijamming capability is strong.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is signal processing module electrical block diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes the sweetener 1 for removing sulfur dioxide in flue gas, in order to realize the control to sweetener 1, the present invention is also provided with the switching on/off circuit 7 be connected with sweetener 1, the PLC 2 be connected with switching on/off circuit 7, the industry control host computer 3 be connected with PLC 2 and signal processing module 4, the signal picker 5 be connected with signal processing module 4, the display 6 be connected with PLC 2 respectively, warning circuit 8 and power circuit 9, and the UPS module 10 be connected with power circuit 9.
Wherein, PLC 2 as the control center of Desulfurization Control Systems, signal picker 5 then for gathering the concentration signal of sulfur dioxide in flue gas, and Signal transmissions to signal processing module 4.For guaranteeing actual effect of the present invention, the HCK-600B-SO2 type SO 2 sensor that this signal picker 5 preferentially adopts Kechuang permanent Electronic Science and Technology Co., Ltd. in Shenzhen's to produce realizes, the SO 2 sensor of this model has detection continuity, fast response time, measuring accuracy is high, stability and reproducible feature.The sulfur dioxide concentration signal that signal processing module 4 can collect collector 5 processes, and the signal fidelity after process is higher.Display 6 for carrying out data display to sulfur dioxide concentration, PLC 2 to receive after sulfur dioxide concentration data again data upload to industry control host computer 3, the process being shown by industry control host computer 3 pairs of data, inquire about and reseted.In addition, sulfur dioxide concentration higher limit is also provided with in industry control host computer 3, after detected sulfur dioxide concentration reaches higher limit, industry control host computer 3 sends instruction to PLC 2 and starts switching on/off circuit 7, starts sweetener 1 carry out desulfurization process by switching on/off circuit 7.When running into urgent abnormal conditions in sweetening process, PLC 2 will be given the alarm by warning circuit 8.Power circuit 9 provides power supply for Desulfurization Control Systems.UPS module 10 can as standby power supply, to ensure the integrality of the system data when abnormal power-down.
In the entire system, the sweetener 1 of this sulphuric dioxide, switching on/off circuit 7, industry control host computer 3, signal picker 5, PLC 2, warning circuit 8 and power circuit 9 all adopt traditional circuit or module to realize, signal processing module 4 is then emphasis place of the present invention, and its structure as shown in Figure 2.
As shown in Figure 2, this signal processing module 4 is by transformer T2, be arranged on telefault L3 and the telefault L4 on the former limit of transformer T2, be arranged on the telefault L5 of transformer T2 secondary, the current rectifying and wave filtering circuit 42 be connected with telefault L3, the front end transforming circuit 41 be connected with current rectifying and wave filtering circuit 42, the driving circuit 43 be connected with telefault L4 and current rectifying and wave filtering circuit 42, the Sheffer stroke gate trigger circuit 45 be connected with telefault L5, and form with the two-stage amplifying circuit 44 that Sheffer stroke gate trigger circuit 45 are connected with driving circuit 43.
Wherein, front end transforming circuit comprises transformer T1, polar capacitor C1, bi-directional voltage stabilizing diode D1.During connection, the positive pole of polar capacitor C1 is connected with the Same Name of Ends of transformer T1 former limit telefault L1, negative pole is connected with the non-same polarity of transformer T1 secondary inductance coil L2, bi-directional voltage stabilizing diode D1 is then in parallel with polar capacitor C1, and the non-same polarity of described transformer T1 former limit telefault L1 is all connected with current rectifying and wave filtering circuit 42 with the Same Name of Ends of transformer T1 secondary inductance coil L2.
Current rectifying and wave filtering circuit 42 can carry out rectifying and wave-filtering process to data-signal, and it comprises diode bridge rectifier U, resistance R6, polar capacitor C3, diode D6.During connection, the input end of described diode bridge rectifier U respectively with the non-same polarity of transformer T1 former limit telefault L1 and transformer T1 secondary inductance coil L2 Same Name of Ends is connected, its cathode output end is connected with the Same Name of Ends of telefault L3, cathode output end is then connected with the Same Name of Ends of telefault L4; The positive pole of polar capacitor C3 is connected with the cathode output end of diode bridge rectifier U, its negative pole is then connected with the N pole of diode D6, resistance R6 is then in parallel with polar capacitor C3, the P pole of described diode D6 is connected with driving circuit 43, and the non-same polarity of described telefault L3 is connected with the P pole of diode D6.
Described driving circuit 43 is by driving chip U1, field effect transistor MOS, N pole is connected with the grid of field effect transistor MOS, the diode D2 that P pole is connected with the CS1 pin of driving chip U1, one end is connected with the N pole of diode D2, the resistance R1 that the other end is connected with the GATE pin of driving chip U1, P pole is connected with the Same Name of Ends of transformer T1 secondary inductance coil L2, the diode D3 that N pole is then connected with the VIN pin of driving chip U1 after resistance R2, positive pole is connected with the Same Name of Ends of telefault L4, the polar capacitor C2 that negative pole is connected with two-stage amplifying circuit 44, one end is connected with the PW pin of driving chip U1, the resistance R4 that the other end is connected with the negative pole of polar capacitor C2, be serially connected in the resistance R3 between the CS2 pin of driving chip U1 and REF pin, and N pole is connected with the non-same polarity of telefault L4, the diode D5 that P pole is then connected with the REF pin of driving chip U1 after voltage stabilizing diode D4 through resistance R5 in turn forms.The drain electrode of described field effect transistor MOS is connected with the P pole of diode D6, source electrode is then connected with the VDD pin of driving chip U1, the GND pin ground connection of described driving chip U1.In order to better implement the present invention, described driving chip U1 is preferably AT9933 integrated circuit to realize, and its driving is effective, can continuous working under the operating mode of temperatures as high 125 degrees Celsius.
Described two-stage amplifying circuit 44 is by amplifier P1, amplifier P2, triode VT1, the resistance R7 that one end is connected with Sheffer stroke gate trigger circuit 45, the other end is connected with the output terminal of amplifier P1, be serially connected in the resistance R8 between the positive pole of amplifier P1 and output terminal, P pole is connected with Sheffer stroke gate trigger circuit 45 with the negative pole of polar capacitor C2 respectively, diode D7 that N pole is connected with the positive pole of amplifier P2 forms.The emitter of described triode VT1 is connected with Sheffer stroke gate trigger circuit 45, grounded collector, base stage are then connected with the positive pole of amplifier P1, and the output terminal of described amplifier P2 is connected with the output terminal of amplifier P1, negative pole is connected with the negative pole of amplifier P1 and the P pole of diode D7 respectively.
Described Sheffer stroke gate trigger circuit 45 are by triode VT2, unidirectional thyristor D9, Sheffer stroke gate A1, Sheffer stroke gate A2, positive pole is connected with the non-same polarity of telefault L5, the polar capacitor C4 that negative pole is then connected with the output terminal of amplifier P1 after resistance R7, the resistance R9 be in parallel with polar capacitor C4, negative pole is connected with the negative pole of polar capacitor C4, the polar capacitor C5 that positive pole is connected with the base stage of triode VT2, N pole is connected with the emitter of triode VT1, the diode D8 that P pole is connected with the emitter of triode VT2, be serially connected in the resistance R11 between the positive pole of Sheffer stroke gate A1 and output terminal, one end is connected with the output terminal of Sheffer stroke gate A1, the resistance R10 that the other end is connected with the control pole of unidirectional thyristor D9, and positive pole is connected with the control pole of unidirectional thyristor D9, the polar capacitor C6 that negative pole is connected with the N pole of diode D8 forms, the described collector of triode VT2 is connected with the positive pole of Sheffer stroke gate A1, the N pole of unidirectional thyristor D9 is connected with the output terminal of Sheffer stroke gate A1, P pole is then connected with the N pole of diode D8 with the P pole of diode D7 respectively, minus earth, the positive pole of Sheffer stroke gate A1 are connected with the non-same polarity of telefault L5, its output terminal is connected with the negative pole of Sheffer stroke gate A2, the plus earth of Sheffer stroke gate A2, the Same Name of Ends of described telefault L5 is connected with the N pole of diode D8.The output terminal of Sheffer stroke gate A2 together with the negative pole of polar capacitor C6 as the output terminal of circuit.
As mentioned above, just well the present invention can be realized.
Claims (7)
1. a signal amplifying type PLC flue gas desulfurization control system, mainly comprise sweetener (1), it is characterized in that: also comprise the switching on/off circuit (7) be connected with sweetener (1), the PLC (2) be connected with switching on/off circuit (7), the industry control host computer (3) be connected with PLC (2) and signal processing module (4), the signal picker (5) be connected with signal processing module (4), the display (6) be connected with PLC (2) respectively, warning circuit (8) and power circuit (9), and the UPS module (10) to be connected with power circuit (9), described signal processing module (4) is then by transformer T2, be arranged on telefault L3 and the telefault L4 on the former limit of transformer T2, be arranged on the telefault L5 of transformer T2 secondary, the current rectifying and wave filtering circuit (42) be connected with telefault L3, the front end transforming circuit (41) be connected with current rectifying and wave filtering circuit (42), the driving circuit (43) be connected with telefault L4 and current rectifying and wave filtering circuit (42), the Sheffer stroke gate trigger circuit (45) be connected with telefault L5, and form with the two-stage amplifying circuit (44) that Sheffer stroke gate trigger circuit (45) are connected with driving circuit (43).
2. a kind of signal amplifying type PLC flue gas desulfurization control system according to claim 1, is characterized in that: described front end transforming circuit comprises transformer T1, polar capacitor C1, bi-directional voltage stabilizing diode D1; The positive pole of described polar capacitor C1 is connected with the Same Name of Ends of transformer T1 former limit telefault L1, negative pole is connected with the non-same polarity of transformer T1 secondary inductance coil L2, bi-directional voltage stabilizing diode D1 is then in parallel with polar capacitor C1, and the non-same polarity of described transformer T1 former limit telefault L1 is all connected with current rectifying and wave filtering circuit (42) with the Same Name of Ends of transformer T1 secondary inductance coil L2.
3. a kind of signal amplifying type PLC flue gas desulfurization control system according to claim 2, is characterized in that: described current rectifying and wave filtering circuit (42) comprises diode bridge rectifier U, resistance R6, polar capacitor C3, diode D6; The input end of described diode bridge rectifier U respectively with the non-same polarity of transformer T1 former limit telefault L1 and transformer T1 secondary inductance coil L2 Same Name of Ends is connected, its cathode output end is connected with the Same Name of Ends of telefault L3, cathode output end is then connected with the Same Name of Ends of telefault L4; The positive pole of polar capacitor C3 is connected with the cathode output end of diode bridge rectifier U, its negative pole is then connected with the N pole of diode D6, resistance R6 is then in parallel with polar capacitor C3, the P pole of described diode D6 is connected with driving circuit (43), and the non-same polarity of described telefault L3 is connected with the P pole of diode D6.
4. a kind of signal amplifying type PLC flue gas desulfurization control system according to claim 3, it is characterized in that: described driving circuit (43) is by driving chip U1, field effect transistor MOS, N pole is connected with the grid of field effect transistor MOS, the diode D2 that P pole is connected with the CS1 pin of driving chip U1, one end is connected with the N pole of diode D2, the resistance R1 that the other end is connected with the GATE pin of driving chip U1, P pole is connected with the Same Name of Ends of transformer T1 secondary inductance coil L2, the diode D3 that N pole is then connected with the VIN pin of driving chip U1 after resistance R2, positive pole is connected with the Same Name of Ends of telefault L4, the polar capacitor C2 that negative pole is connected with two-stage amplifying circuit (44), one end is connected with the PW pin of driving chip U1, the resistance R4 that the other end is connected with the negative pole of polar capacitor C2, be serially connected in the resistance R3 between the CS2 pin of driving chip U1 and REF pin, and N pole is connected with the non-same polarity of telefault L4, the diode D5 that P pole is then connected with the REF pin of driving chip U1 after voltage stabilizing diode D4 through resistance R5 in turn forms, the drain electrode of described field effect transistor MOS is connected with the P pole of diode D6, source electrode is then connected with the VDD pin of driving chip U1, the GND pin ground connection of described driving chip U1.
5. a kind of signal amplifying type PLC flue gas desulfurization control system according to claim 4, it is characterized in that: described two-stage amplifying circuit (44) is by amplifier P1, amplifier P2, triode VT1, the resistance R7 that one end is connected with Sheffer stroke gate trigger circuit (45), the other end is connected with the output terminal of amplifier P1, be serially connected in the resistance R8 between the positive pole of amplifier P1 and output terminal, P pole forms with the diode D7 that negative pole is connected with Sheffer stroke gate trigger circuit (45), N pole is connected with the positive pole of amplifier P2 of polar capacitor C2 respectively; The emitter of described triode VT1 is connected with Sheffer stroke gate trigger circuit (45), grounded collector, base stage are then connected with the positive pole of amplifier P1, and the output terminal of described amplifier P2 is connected with the output terminal of amplifier P1, negative pole is connected with the negative pole of amplifier P1 and the P pole of diode D7 respectively.
6. a kind of signal amplifying type PLC flue gas desulfurization control system according to claim 5, it is characterized in that: described Sheffer stroke gate trigger circuit (45) are by triode VT2, unidirectional thyristor D9, Sheffer stroke gate A1, Sheffer stroke gate A2, positive pole is connected with the non-same polarity of telefault L5, the polar capacitor C4 that negative pole is then connected with the output terminal of amplifier P1 after resistance R7, the resistance R9 be in parallel with polar capacitor C4, negative pole is connected with the negative pole of polar capacitor C4, the polar capacitor C5 that positive pole is connected with the base stage of triode VT2, N pole is connected with the emitter of triode VT1, the diode D8 that P pole is connected with the emitter of triode VT2, be serially connected in the resistance R11 between the positive pole of Sheffer stroke gate A1 and output terminal, one end is connected with the output terminal of Sheffer stroke gate A1, the resistance R10 that the other end is connected with the control pole of unidirectional thyristor D9, and positive pole is connected with the control pole of unidirectional thyristor D9, the polar capacitor C6 that negative pole is connected with the N pole of diode D8 forms, the described collector of triode VT2 is connected with the positive pole of Sheffer stroke gate A1, the N pole of unidirectional thyristor D9 is connected with the output terminal of Sheffer stroke gate A1, P pole is then connected with the N pole of diode D8 with the P pole of diode D7 respectively, minus earth, the positive pole of Sheffer stroke gate A1 are connected with the non-same polarity of telefault L5, its output terminal is connected with the negative pole of Sheffer stroke gate A2, the plus earth of Sheffer stroke gate A2, the Same Name of Ends of described telefault L5 is connected with the N pole of diode D8.
7. a kind of signal amplifying type PLC flue gas desulfurization control system according to any one of claim 4 ~ 6, is characterized in that: described driving chip U1 is AT9933 integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510191783.0A CN104808574A (en) | 2015-04-21 | 2015-04-21 | Signal amplification type PLC flue gas desulfurization control system |
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| CN201510191783.0A CN104808574A (en) | 2015-04-21 | 2015-04-21 | Signal amplification type PLC flue gas desulfurization control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106997187A (en) * | 2016-01-22 | 2017-08-01 | 长沙敏瑞自动化设备有限公司 | A kind of flue gas desulfurization host computer control system |
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| CN104467438A (en) * | 2014-11-29 | 2015-03-25 | 成都思茂科技有限公司 | High-power triggering and boosting circuit based on linear driving |
| CN104502115A (en) * | 2014-11-19 | 2015-04-08 | 成都创图科技有限公司 | High precision detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0410196A (en) * | 1990-04-27 | 1992-01-14 | Toshiba Corp | Plant warning monitor |
| CN203573146U (en) * | 2013-10-25 | 2014-04-30 | 万斌 | Flue gas desulphuring control system |
| CN203984389U (en) * | 2014-07-15 | 2014-12-03 | 成都汇众汽车配件制造有限公司 | A kind of detection system of high-sensitivity detection instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106997187A (en) * | 2016-01-22 | 2017-08-01 | 长沙敏瑞自动化设备有限公司 | A kind of flue gas desulfurization host computer control system |
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