CN107608300A - Flue gas automatic monitored control system and its method - Google Patents
Flue gas automatic monitored control system and its method Download PDFInfo
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- CN107608300A CN107608300A CN201710683765.3A CN201710683765A CN107608300A CN 107608300 A CN107608300 A CN 107608300A CN 201710683765 A CN201710683765 A CN 201710683765A CN 107608300 A CN107608300 A CN 107608300A
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- flue gas
- filter
- gas
- controller
- control system
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000003546 flue gas Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000001301 oxygen Substances 0.000 claims abstract description 45
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 45
- 238000004458 analytical method Methods 0.000 claims abstract description 43
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 239000000779 smoke Substances 0.000 claims abstract description 31
- 238000007664 blowing Methods 0.000 claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 238000005070 sampling Methods 0.000 claims description 26
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 18
- 229910001882 dioxygen Inorganic materials 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000010408 sweeping Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- QRSFFHRCBYCWBS-UHFFFAOYSA-N [O].[O] Chemical compound [O].[O] QRSFFHRCBYCWBS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The present invention provides a kind of flue gas automatic monitored control system and its method, for the composition of monitoring analysis flue gas, including smoke inlet pipelines, filter, back-blowing device and controller；The input of smoke inlet pipelines and filter connects, and the output end of back-blowing device and filter connects；Controller controls back-blowing device to filter blowback compressed air.The present invention can start multi-component gas mixture process according to the analysis result of oxygen content in flue, prevent that compressed air is blended in interference multi-component gas mixture result in flue gas in blowback.
Description
Technical field
The invention belongs to flue gas inspection technical field, and in particular to a kind of flue gas automatic monitored control system and its method.
Background technology
Flue gas automatic monitored control system (CEMS) is to carry out concentration to the gaseous contaminant and particulate matter of atmosphere pollution source emission
The device of authorities is real-time transmitted to total emission volumn continuous monitoring and by information, also known as " fume emission continuous monitoring system
System " or " smoke on-line monitoring system ".The exhaust emission of flue gas automatic monitored control system monitoring includes SO2、NQx、HCL、CO、CO2、
And particulate matter.
A most important part is the analytical instrument for smoke components measurement in flue gas automatic monitored control system.Due to cigarette
The analytical instrument of gas composition measurement there are certain requirements to the cleanliness factor of flue gas, therefore the flue gas given off in industrial production has to
It is out of dust by the smoke filter filtering in smoke sampling device, detection of exhaust gas compositions could be carried out.So, in flue gas
Particulate matter is easily accumulated in smoke filter and its neighbouring flue, and the time one is grown, or even can block flue and flue gas mistake
Filter.
In order to recover the filtering function of smoke filter, it is necessary to use compressed air to be opened as wind regime within a certain period of time
Dynamic blowing function, i.e., carry out blowback to smoke filter and neighbouring flue, the compressed air in opposite direction for flow of flue gas
Sweep, take away particulate matter in smoke filter and its front end smoke canal, dust etc., recover the filtering function of smoke filter.But
During blowback and after blowback, compressed air is will be filled with smoke filter and its neighbouring flue.If now, flue gas into
Divide the analytical instrument of measurement to analyze the gas in flue, then can be disturbed by compressed air.Such as in compressed air
The content of oxygen is about 21%, and now measuring oxygen content will drastically become big, cause superscalar data.
Have in the prior art and the software with delay control function is utilized after blowback, the analysis of control smoke components measurement
Instrument postpones to carry out extraction detection to gas in 1 minute after blowback.But this constant time lag, it is difficult to ensure compressed air
Clean, the influence of not compressed air is excluded.In this state, analysis meeting is carried out to the gas componant in flue to go out
Now very big error, measurement effect are highly unstable.
Patent smoke on-line monitoring system and monitoring method (day for announcing 2016.01.13, notification number CN104407161B) are public
Opened a kind of smoke on-line monitoring system and monitoring method, including Pitotmeter, flue gas sampler, particle monitoring instrument,
Pipeline and demarcation pipeline are sampled, Pitotmeter, flue gas sampler and particle monitoring instrument are both provided with blowback sweeping device, respectively
The signal receiving end of blowback sweeping device is connected with central controller respectively, passes through each blowback sweeping device timing of central controller controls
Purged.Flue gas sampler flue gas is acquired after successively by the first refrigerator, pneumatic filter, the second refrigerator and
Membrane filter, each device carry out cooling filtering to collection flue gas, and the remaining flue gas finally obtained is passed through Multi-Component Gas Analyzing
Instrument carries out analysis detection.When being swept in the patent to the progress blowback of flue gas sampler anti-purging system, after being simply turned off flue gas sampler
The cut-off electromagnetic valve of connection is held, avoids compressed air from being blown into sampling pipeline, but do not done to the compressed air in flue gas sampler
Any processing, after blowback terminates, cut-off electromagnetic valve is opened, and the flue gas in flue gas sampler enters with compressed air mixture to be adopted
When sample pipeline carries out analysis detection, smoke components measurement can be caused larger error occur.
Therefore it is simple in construction to be badly in need of one kind, it is reasonable in design, flue compressed air concentration levels can be monitored, and root
According to the flue gas automatic monitored control system and method for monitoring result delay start fume component analysis device.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of flue gas automatic monitored control system and its method, the system and
Method can start multi-component gas mixture process according to the analysis result of oxygen content in flue, prevent from compressing sky in blowback
Gas is blended in interference multi-component gas mixture result in flue gas.
The invention provides following technical scheme：
A kind of flue gas automatic monitored control system, for the composition of monitoring analysis flue gas,
Including smoke inlet pipelines, filter, back-blowing device and controller；
The input of smoke inlet pipelines and filter connects；
The output end of back-blowing device and filter connects；
Controller controls back-blowing device to filter blowback compressed air.
Preferably, flue gas automatic monitored control system also includes pressure sensor, and pressure sensor is arranged in filter, pressure
Pressure information in Sensor monitoring filter；Pressure information is sent to controller by pressure sensor.
Preferably, flue gas automatic monitored control system also includes sampling pump, and sampling pump is connected with filter output end, samples pumping
The flue gas for taking filter output end to export.
Preferably, flue gas automatic monitored control system also includes oxygen gas component analytical equipment, oxygen gas component analytical equipment and sampling
The output end connection of pump, the oxygen content in flue gas that oxygen gas component analytical equipment exports to sampling pump carry out analysis and form oxygen
Oxygen content result is sent to controller by content results, oxygen gas component analytical equipment.
Preferably, flue gas automatic monitored control system also includes more gas composition analysis devices, more gas composition analysis devices with
The output end connection of sampling pump, the multiple gases content in flue gas that more gas composition analysis devices export to sampling pump are divided
Analysis forms more gas content results, and the open and close of more gas composition analysis devices are controlled by the controller.
Preferably, when oxygen content result is less than 100%~130% of oxygen content in former flue gas, controller starts more
Gas composition analysis device.
Preferably, controller is PLC.
Preferably, flue gas automatic monitored control system also includes power supply, and power supply provides electric power for flue gas automatic monitored control system.
A kind of flue gas automatic monitoring method, comprises the following steps：
S1:Filtering, flue gas enter filter, filter filtering flue gas by smoke inlet pipelines；
S2：Pressure acquisition, the pressure information in pressure sensor monitoring filter in filter simultaneously send out pressure information
Give controller；
S3:Air pressure monitor, controller judge to start back-blowing device when the pressure information in filter is excessive；Back-blowing device to
Filter and smoke inlet pipelines blowback compressed air；Controller judges to close when the pressure information in filter reaches desired value
Close back-blowing device；
S4：Gas composition analysis, sampling pump extract the flue gas of filter output, and oxygen gas component analytical equipment is analyzed in flue gas
Oxygen content, generate oxygen content result, and oxygen content result be sent to controller；Controller is until oxygen content knot
Fruit just starts more gas composition analysis devices when being less than 100%~130% of oxygen content in former flue gas, starts more gas componants
Analysis.
The beneficial effects of the invention are as follows：
1st, the present invention is simple in construction, and easy for installation, cost is cheap.
2nd, the present invention is sent to PLC by monitoring the pressure information in filter, and by pressure information, by PLC
Controller judges, starts back-blowing device when pressure information is excessive, to filter blowback compressed air, by filter and flue
Particulate matter, the dust of deposition are blown away, and recover the unimpeded of filter；PLC judges, is closed when pressure information reaches desired value
Close back-blowing device.By the cooperation of pressure sensor and PLC, filter and flue can be carried out at blowback when necessary
Reason, prevent filter and flue from being blocked by particulate matter, dust.
3rd, the oxygen content in the flue gas exported in the present invention by oxygen gas component analytical equipment to filter carries out analysis shape
Into oxygen content result, oxygen content result is sent to controller by oxygen gas component analytical equipment.During blowback, compression
Air is entered in filter and flue, if carrying out more gas composition analysis to the flue gas for being mixed with compressed air, easily
Produce larger error.Due to the content of oxygen in compressed air be it is certain reach 21% or so, and flue gas in industrial production
Oxygen content also compares fixation, so may determine that in flue gas whether mix compressed air by the oxygen content monitored in flue gas
And the substantially content of mixing compressed air.
4th, controller obtains oxygen content result in the present invention, when oxygen content result is less than oxygen content in former flue gas
Just start more gas composition analysis devices when 100%~130%.When oxygen content result is less than oxygen content in former flue gas
100%~130% when, that is to say, that now the oxygen content in flue gas contains with the oxygen in the flue gas of unmixed compressed air
Amount maintains an equal level or substantially maintained an equal level, it can be determined that now the compressed air in flue gas has been drained off or major part empties, and at this time analyzes
More gas componants in flue gas can obtain being more conform with more gas componant results in the raw flue gas of unmixed compressed air.
5th, controller uses PLC in the present invention, facilitates programming Control.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the structured flowchart connected between critical piece of the present invention；
Fig. 2 is the step schematic diagram of flue gas automatic monitoring method in the present invention.
In figure mark for：1st, smoke inlet pipelines；2nd, filter；3rd, back-blowing device；4th, controller；5th, pressure sensor；
6th, oxygen gas component analytical equipment；7th, more gas composition analysis devices；8th, power supply；9 sampling pumps.
Embodiment
The preferred embodiment of the present invention is described below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention provides a kind of flue gas automatic monitored control system, for the composition of monitoring analysis flue gas, including
Smoke inlet pipelines 1, filter 2, back-blowing device 3 and controller 4；Smoke inlet pipelines 1 are connected with the input of filter 2；
Back-blowing device 3 is connected with the output end of filter 2；Controller 4 controls back-blowing device 3 to the blowback compressed air of filter 2.Control
Device 4 is PLC.
Specifically, flue gas automatic monitored control system also includes pressure sensor 5, pressure sensor 5 is arranged in filter 2,
Pressure sensor 5 monitors the pressure information in filter 2；Pressure information is sent to controller 4 by pressure sensor 5.
Specifically, flue gas automatic monitored control system also includes sampling pump 9, sampling pump 9 is connected with the output end of filter 2, sampling
Pump 9 extracts the flue gas of the output end of filter 2 output.
Specifically, flue gas automatic monitored control system also includes oxygen gas component analytical equipment 6, oxygen gas component analytical equipment 6 and mistake
The output end connection of sampling pump 9, the oxygen content in flue gas that oxygen gas component analytical equipment 6 exports to sampling pump 9 are analyzed
Oxygen content result is formed, oxygen content result is sent to controller 4 by oxygen gas component analytical equipment 6.
Specifically, flue gas automatic monitored control system also includes more gas composition analysis devices 7, more gas composition analysis devices 7
It is connected with the output end of sampling pump 9, the multiple gases content in flue gas that more gas composition analysis devices 7 export to sampling pump 9
Carry out analysis and form more gas content results, the controlled device 4 of open and close of more gas composition analysis devices 7 controls.
Specifically, when oxygen content result is less than 100%~130% of oxygen content in former flue gas, controller 4 starts more
Gas composition analysis device 7.
Specifically, flue gas automatic monitored control system also includes power supply 8, power supply 8 provides electric power for flue gas automatic monitored control system.
As shown in Fig. 2 present invention also offers a kind of flue gas automatic monitoring method, it comprises the following steps：
S1:Filtering, flue gas enter filter 2 by smoke inlet pipelines 1, and filter 2 filters flue gas；
S2：Pressure acquisition, the pressure sensor 5 in filter 2 monitor the pressure information in filter 2 and by pressure informations
It is sent to controller 4；
S3:Air pressure monitor, controller 4 judge to start back-blowing device 3 when the pressure information in filter 2 is excessive；Blowback fills
3 are put to filter 2 and the blowback compressed air of smoke inlet pipelines 1；Controller 4 judges that the pressure information in filter 2 reaches
Back-blowing device 3 is closed during desired value；
S4：Gas composition analysis, sampling pump 9 extract the flue gas that filter 2 exports, and oxygen gas component analytical equipment 6 analyzes cigarette
Oxygen content in gas, oxygen content result is generated, and oxygen content result is sent to controller 4；Controller 4 is until oxygen
Content results just start more gas composition analysis devices 7 when being less than 100%~130% of oxygen content in former flue gas, start more
Gas composition analysis.
In another embodiment of the present invention, controller 4 can set the blowback time cycle, and controller 4 controls back-blowing device 3 to exist
Timing periodically carries out blowback to smoke inlet pipelines 1 and filter 2 in each blowback time cycle.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (9)
1. a kind of flue gas automatic monitored control system, the composition for monitoring analysis flue gas, it is characterised in that
Including smoke inlet pipelines, filter, back-blowing device and controller；
The smoke inlet pipelines are connected with the input of the filter；
The back-blowing device is connected with the output end of the filter；
The controller controls the back-blowing device to the filter blowback compressed air.
2. flue gas automatic monitored control system according to claim 1, it is characterised in that also including pressure sensor, the pressure
Force snesor is arranged in the filter, the pressure information described in the pressure sensor monitoring in filter；The pressure
The pressure information is sent to the controller by sensor.
3. flue gas automatic monitored control system according to claim 2, it is characterised in that also including sampling pump, the sampling pump
It is connected with the filter output end, the sampling pump extracts the flue gas of the filter output end output.
4. flue gas automatic monitored control system according to claim 3, it is characterised in that also including oxygen gas component analytical equipment,
The oxygen gas component analytical equipment is connected with the output end of the sampling pump, and the oxygen gas component analytical equipment is to the sampling pump
Oxygen content in the flue gas of output carries out analysis and forms oxygen content result, and the oxygen gas component analytical equipment is by described in
Oxygen content result is sent to the controller.
5. flue gas automatic monitored control system according to claim 4, it is characterised in that also filled including more gas composition analysis
Put, more gas composition analysis devices are connected with the output end of the sampling pump, and more gas composition analysis devices are to institute
State the multiple gases content in the flue gas of sampling pump output and carry out analysis and form more gas content results, more gases into
The open and close of analytical equipment are divided to be controlled by the controller.
6. flue gas automatic monitored control system according to claim 5, it is characterised in that the oxygen content result is less than former cigarette
In gas oxygen content 100%~130% when, the controller starts more gas composition analysis devices.
7. flue gas automatic monitored control system according to claim 6, it is characterised in that the controller is PLC.
8. flue gas automatic monitored control system according to claim 7, it is characterised in that also including power supply, the power supply is institute
State flue gas automatic monitored control system and electric power is provided.
9. a kind of flue gas automatic monitoring method, it is characterised in that comprise the following steps：
S1:Filtering, flue gas enter filter, filter filtering flue gas by smoke inlet pipelines；
S2：Pressure information is simultaneously sent to by pressure acquisition, the pressure information in pressure sensor monitoring filter in filter
Controller；
S3:Air pressure monitor, controller judge to start back-blowing device when the pressure information in filter is excessive；Back-blowing device is to filtering
Device and smoke inlet pipelines blowback compressed air；Controller judges to close anti-when the pressure information in filter reaches desired value
Blowing apparatus；
S4：Gas composition analysis, sampling pump extract the flue gas of filter output, and oxygen gas component analytical equipment analyzes the oxygen in flue gas
Gas content, oxygen content result is generated, and oxygen content result is sent to controller；Controller is low until oxygen content result
In former flue gas oxygen content 100%~130% when just start more gas composition analysis devices, start more gas componants point
Analysis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710683765.3A CN107608300B (en) | 2017-08-11 | 2017-08-11 | Automatic flue gas monitoring system and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710683765.3A CN107608300B (en) | 2017-08-11 | 2017-08-11 | Automatic flue gas monitoring system and method thereof |
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| Publication Number | Publication Date |
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| CN107608300A true CN107608300A (en) | 2018-01-19 |
| CN107608300B CN107608300B (en) | 2023-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116271645A (en) * | 2023-02-20 | 2023-06-23 | 山东龙盾智能技术有限公司 | Fire safety on-line monitoring system |
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