CN220104935U - Boiler flue gas on-line monitoring system - Google Patents
Boiler flue gas on-line monitoring system Download PDFInfo
- Publication number
- CN220104935U CN220104935U CN202223512065.3U CN202223512065U CN220104935U CN 220104935 U CN220104935 U CN 220104935U CN 202223512065 U CN202223512065 U CN 202223512065U CN 220104935 U CN220104935 U CN 220104935U
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- flue gas
- capacitor
- operational amplifier
- electrochemical sensor
- monitoring system
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000003546 flue gas Substances 0.000 title claims abstract description 43
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 abstract description 5
- 230000009545 invasion Effects 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 description 9
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a boiler flue gas online monitoring system, which comprises a flue gas concentration acquisition module and a data transmission module, wherein the flue gas concentration acquisition module comprises an electrochemical sensor for acquiring the concentration of the boiler flue gas, detection signals of the electrochemical sensor are sequentially processed by an operational amplifier compensator, a amplitude stabilizing filter and an A/D converter and then are sent to a controller, and the controller is used for transmitting the flue gas concentration data to a background monitoring center through the data transmission module; according to the utility model, the detection front-end circuit is arranged in the flue gas concentration acquisition module to process the detection signal of the electrochemical sensor, so that the external clutter interference and the invasion of harmful noise are effectively inhibited, the detection signal output by the electrochemical sensor under the complex environment condition still has good accuracy, the flue gas concentration detection is ensured to be accurate and effective, and the reliability of the operation data of the boiler flue gas online monitoring system is improved.
Description
Technical Field
The utility model relates to the technical field of boiler equipment monitoring, in particular to a boiler flue gas online monitoring system.
Background
The performance characteristics and practical values of various flue gas monitoring technologies are analyzed and compared, an online flue gas component monitoring technology suitable for ultra-low emission modification is provided, and references are provided for the type selection of the flue gas monitoring system of the coal-fired power plant boiler. The existing continuous monitoring system (Continuous Emission Monitoring System, CEMS for short) for flue gas emission mostly adopts 'large system integration', namely, a main analysis component adopts inlet equipment, and a collecting element mainly selects a sensor probe in the detection of NOx concentration in flue gas, but the existing flue gas sensor is easy to be interfered by the outside under the condition of complex environment, so that peak fluctuation and harmful noise exist in the output of a sensor detection signal, and the accuracy of flue gas concentration detection is seriously affected.
The present utility model provides a new solution to this problem.
Disclosure of Invention
Aiming at the situation, the utility model aims to overcome the defects of the prior art and provide an on-line monitoring system for boiler flue gas.
The technical scheme for solving the problems is as follows: the utility model provides a boiler flue gas on-line monitoring system, includes flue gas concentration collection module and data transmission module, flue gas concentration collection module is including the electrochemical sensor that is used for gathering boiler flue gas concentration, electrochemical sensor's detected signal sends into the controller after passing through fortune in proper order and amplifying compensator, steady amplitude wave filter and AD converter processing, the controller is used for passing through flue gas concentration data transmission module transmits background monitoring center.
Preferably, the op-amp compensator includes an op-amp AR1, an inverting input end of the op-amp AR1 is connected to a signal output end of the electrochemical sensor, and is connected to an output end of the op-amp AR1 through a parallel resistor R2 and a capacitor C1, a non-inverting input end of the op-amp AR1 is grounded through the resistor R1, an output end of the op-amp AR1 is grounded through the capacitor C2, and is connected to one end of the varistor RP1 and one end of the capacitor C3 through a resistor R3, and a sliding end of the varistor RP1 is connected to the other end of the capacitor C3 in parallel.
Preferably, the amplitude stabilizing filter comprises a triode VT1, an emitter electrode of the triode VT1 is connected with a resistor R4, one end of a capacitor C4 and an output end of the operational amplifier compensator, a base electrode of the triode VT1 is connected with the resistor R4, the other end of the capacitor C4 and a cathode of a zener diode DZ1, an anode of the zener diode DZ1 is grounded, a collector electrode of the triode VT1 is connected with one end of a capacitor C5 and an inductor L1, the other end of the inductor L1 is connected with one end of a capacitor C6 and the other end of the capacitor C5 and the other end of the capacitor C6 are connected with the ground in parallel.
Preferably, the electrochemical sensor is a NO/NO2-A1 sensor.
Through the technical scheme, the utility model has the beneficial effects that: according to the utility model, the detection front-end circuit is arranged in the flue gas concentration acquisition module to process the detection signal of the electrochemical sensor, so that the external clutter interference and the invasion of harmful noise are effectively inhibited, the detection signal output by the electrochemical sensor under the complex environment condition still has good accuracy, the flue gas concentration detection is ensured to be accurate and effective, and the reliability of the operation data of the boiler flue gas online monitoring system is improved.
Drawings
Fig. 1 is a schematic circuit diagram of an op-amp compensator according to the present utility model.
Fig. 2 is a schematic circuit diagram of the amplitude stabilizing filter of the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The utility model provides a boiler flue gas on-line monitoring system, includes flue gas concentration collection module and data transmission module, and flue gas concentration collection module is including the electrochemical sensor that is used for gathering boiler flue gas concentration, electrochemical sensor's detected signal sends into the controller after passing through fortune amplifier compensator, steady amplitude wave filter and AD converter in proper order to handle, the controller is used for passing through flue gas concentration data transmission module transmits background monitoring center.
As shown in fig. 1, the op-amp compensator includes an op-amp AR1, an inverting input terminal of the op-amp AR1 is connected to a signal output terminal of the electrochemical sensor, and is connected to an output terminal of the op-amp AR1 through a parallel resistor R2 and a capacitor C1, a non-inverting input terminal of the op-amp AR1 is grounded through the resistor R1, an output terminal of the op-amp AR1 is grounded through the capacitor C2, and is connected to one end of a varistor RP1 and one end of a capacitor C3 through a resistor R3, and a sliding terminal of the varistor RP1 is connected to the other end of the capacitor C3 in parallel.
As shown in fig. 2, the amplitude stabilizing filter includes a triode VT1, an emitter of the triode VT1 is connected with a resistor R4, one end of a capacitor C4 and an output end of the op-amp compensator, a base of the triode VT1 is connected with the resistor R4, the other end of the capacitor C4 and a cathode of a zener diode DZ1, an anode of the zener diode DZ1 is grounded, a collector of the triode VT1 is connected with one end of a capacitor C5 and an inductor L1, the other end of the inductor L1 is connected with one end of a capacitor C6 and the a/D converter, and the other ends of the capacitor C5 and the capacitor C6 are connected with the ground in parallel.
When the utility model is specifically used, the electrochemical sensor is a NO/NO2-A1 sensor with the model of alpha sense company, which is mainly used for detecting and analyzing NO in boiler smoke, and the electrochemical sensor is easy to generate detection errors in a complex environment, so that the output signal of the electrochemical sensor is subjected to detection front-end circuit processing, and the specific working principle is as follows: firstly, an operational amplifier compensator performs inverse amplification treatment on a smoke detection signal by adopting an operational amplifier AR1 to improve the intensity of the detection signal, and adds resistance-capacitance phase compensation in the operational amplifier process to ensure the stability of the output waveform of the amplified signal of the detection signal, and then performs preliminary noise reduction in an RC low-pass filter network to eliminate external high-frequency clutter in the smoke detection signal;
further, the amplitude stabilizing filter is used for further processing the output signal of the operational amplifier compensator, firstly, the triode VT1 serves as a regulating tube for carrying out amplitude stabilizing processing on the smoke detection signal, the voltage stabilizing diode DZ1 is used for stabilizing the base conducting voltage of the triode VT1, the capacitor C4 is arranged for buffering the input signal of the triode VT1, therefore, the triode VT1 is guaranteed to have good amplification characteristics, the stability of the output amplitude of the smoke detection signal is improved, then the smoke detection signal is sent into the pi-type LC filter consisting of the capacitors C5 and C6 and the inductor L1 for carrying out accurate noise reduction, peak fluctuation in the detection signal is effectively eliminated, the A/D converter is enabled to accurately and effectively output the detection signal through analog-digital conversion, finally, the concentration value of NOx in the smoke is calculated and analyzed by the controller, and the smoke concentration data is transmitted to a background monitoring center through the data transmission module, and the remote on-line monitoring of the boiler smoke is realized.
According to the utility model, the detection front-end circuit is arranged in the flue gas concentration acquisition module to process the detection signal of the electrochemical sensor, so that the external clutter interference and the invasion of harmful noise are effectively inhibited, the detection signal output by the electrochemical sensor under the complex environment condition still has good accuracy, the flue gas concentration detection is ensured to be accurate and effective, and the reliability of the operation data of the boiler flue gas online monitoring system is improved.
While the utility model has been described in connection with certain embodiments, it is not intended that the utility model be limited thereto; for those skilled in the art to which the present utility model pertains and the related art, on the premise of based on the technical scheme of the present utility model, the expansion, the operation method and the data replacement should all fall within the protection scope of the present utility model.
Claims (4)
1. The utility model provides a boiler flue gas on-line monitoring system, includes flue gas concentration collection module and data transmission module, its characterized in that: the flue gas concentration acquisition module comprises an electrochemical sensor for acquiring the concentration of flue gas of a boiler, detection signals of the electrochemical sensor are sequentially processed by the operational amplifier compensator, the amplitude stabilizing filter and the A/D converter and then are sent to the controller, and the controller is used for transmitting flue gas concentration data to a background monitoring center through the data transmission module.
2. The boiler flue gas online monitoring system of claim 1, wherein: the operational amplifier compensator comprises an operational amplifier AR1, wherein the inverting input end of the operational amplifier AR1 is connected with the signal output end of the electrochemical sensor, the inverting input end of the operational amplifier AR1 is connected with the output end of the operational amplifier AR1 through a resistor R2 which is connected in parallel, the non-inverting input end of the operational amplifier AR1 is grounded through the resistor R1, the output end of the operational amplifier AR1 is grounded through a capacitor C2, one ends of a rheostat RP1 and a capacitor C3 are connected through a resistor R3, and the sliding end of the rheostat RP1 is connected with the other end of the capacitor C3 in parallel.
3. The boiler flue gas online monitoring system of claim 2, wherein: the amplitude stabilizing filter comprises a triode VT1, wherein an emitter electrode of the triode VT1 is connected with a resistor R4, one end of a capacitor C4 and the output end of the operational amplifier compensator, a base electrode of the triode VT1 is connected with the resistor R4, the other end of the capacitor C4 and a cathode of a voltage stabilizing diode DZ1, an anode of the voltage stabilizing diode DZ1 is grounded, a collector electrode of the triode VT1 is connected with one end of a capacitor C5 and one end of an inductor L1, the other end of the inductor L1 is connected with one end of a capacitor C6 and the other end of the capacitor C5 and the other end of the capacitor C6 are connected with the ground in parallel.
4. The boiler flue gas online monitoring system of claim 1, wherein: the electrochemical sensor is a NO/NO2-A1 sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223512065.3U CN220104935U (en) | 2022-12-28 | 2022-12-28 | Boiler flue gas on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223512065.3U CN220104935U (en) | 2022-12-28 | 2022-12-28 | Boiler flue gas on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220104935U true CN220104935U (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223512065.3U Active CN220104935U (en) | 2022-12-28 | 2022-12-28 | Boiler flue gas on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220104935U (en) |
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2022
- 2022-12-28 CN CN202223512065.3U patent/CN220104935U/en active Active
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