CN108918789A - A kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas - Google Patents
A kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas Download PDFInfo
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- CN108918789A CN108918789A CN201811046753.0A CN201811046753A CN108918789A CN 108918789 A CN108918789 A CN 108918789A CN 201811046753 A CN201811046753 A CN 201811046753A CN 108918789 A CN108918789 A CN 108918789A
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- 238000010926 purge Methods 0.000 title claims abstract description 74
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000003546 flue gas Substances 0.000 title claims abstract description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 416
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 201
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 claims abstract 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002000 scavenging effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000013618 particulate matter Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002808 molecular sieve Substances 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0029—Cleaning of the detector
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Drying Of Gases (AREA)
Abstract
The present invention proposes a kind of purge gass air supply system of power-plant flue gas on-line continuous monitoring system, purge gass system is made of Nitrogen Generator System and bottled nitrogen air supply system, bailout gas of the bottled nitrogen air supply system as Nitrogen Generator System, when Nitrogen Generator System failure, nitrogen steam line pressure gradually decreases, when being reduced to the low alarm pressure setting value of CEMS instrument purge gass, the low alarm of triggering purging atmospheric pressure simultaneously opens bottled nitrogen air supply system solenoid valve, bottled nitrogen air supply system puts into operation immediately, prevent purge gass from interrupting, can the purge gass of high-quality be provided to analyzer incessantly, ensure the cleaning of analyzer eyeglass and drying so that it is guaranteed that analyzer monitoring data Stability and veracity, efficiently solving the prior art, there are problems.
Description
Technical field
The present invention relates to the flue gas emission monitoring devices more particularly to a kind of electricity of coal-fired power plant or garbage incinerating power plant
The continuous on-line monitoring system of factory's flue gas (Continuous Emission Monitoring System hereinafter referred to as CEMS's) blows
Scavenging air supply system, CEMS system need the moment to provide purge gass to purge the eyeglass of analyzer internal interference instrument when operating normally,
Guarantee the drying of eyeglass and clean.
Background technique
CEMS system needs the moment to guarantee that interferometer eyeglass is clean, dry to interferometer offer purge gass when operating normally,
Guarantee accuracy, the stability of analyzer.Power plant of the country generallys use in factory and makes instrument compressed air by oneself (hereinafter referred to as at present
Compressed air for instrument), two kinds of gases of outsourcing bottled nitrogen as purge gass, but above two purge gass have the defects that it is certain.
Make compressed air for instrument oil-containing, water in factory by oneself：Since power plant's compressed air for instrument usage amount is especially big, power plant
Exhaust end base of oil injection threaded bolt type air compressor machine is generallyd use to produce compressed air, a series of mating air equipment for after-treatments of setting compress to remove
The moisture content of air, oil content reach the quality of instrument gas, and due to air compressor machine attribute question itself, equipment for after-treatment can only be accomplished
99.99% moisture content, oil content in compressed air are removed, does not accomplish 100% removal, use is to CEMS instrumental effects in the short time
It is smaller, but oil, the water of rear compressed air accumulative for a long time will pollute the eyeglass of interferometer, and analyzer is caused to damage.
Compressed air for instrument contains a certain amount of oxygen and other gases, for a long time with analyzer inner core component contact,
It is easy that analyzer core component is allowed to aoxidize.
Outsourcing bottled nitrogen period length, quality cannot be guaranteed：The purity of the purge gass requirement bottled nitrogen of CEMS instrument >=
99.99%, but the purity for the nitrogen oil content and water content and nitrogen for going detection to purchase currently without means, if quality
Bad direct pollution analyzer, there are certain hidden danger；The bottled nitrogen quantity that the power plant big for air consumption purchases every time compared with
More, many large size cities are all producer's production procurements from adjacent cities without the producer for generating special gas, therefore are supplied
Period is longer, in emergency circumstances will appear the case where gas supply interrupts.
CEMS instrument is contaminated, and is directly affected safety, the stability, accuracy of analyzer, often be will appear CEMS
The flue gas data exception of instrumental analysis fluctuates and is easy exceeded, and the requirement with country to environmental protection is higher and higher, and environmentally friendly parameter reaches
Mark discharge not only has relationship with flue gas treating process, and the Stability and veracity of CEMS instrument is also even more important, therefore guarantees
Stability, the accuracy of CEMS instrument are extremely important.
Summary of the invention
In order to solve prior art problem, the present invention proposes a kind of power-plant flue gas on-line continuous monitoring system (CEMS) purging
Gas air supply system, purge gass system are made of Nitrogen Generator System and bottled nitrogen air supply system, bottled nitrogen air supply system
As the bailout gas of Nitrogen Generator System, when Nitrogen Generator System failure, nitrogen steam line pressure is gradually decreased,
When being reduced to the low alarm pressure setting value of CEMS instrument purge gass, bottled nitrogen gas supply is simultaneously opened in the low alarm of triggering purging atmospheric pressure
System solenoid valve, bottled nitrogen air supply system put into operation immediately, prevent purge gass interruption from jeopardizing equipment safety.
The present invention solves technical problem, a kind of power-plant flue gas on-line continuous monitoring system (CEMS) purge gass gas supply system
System, characterized in that the CEMS purge gass air supply system is made of Nitrogen Generator System and bottled nitrogen air supply system, by institute
It states Nitrogen Generator System and the parallel connection of bottled nitrogen air supply system and provides the nitrogen of purging to CEMS analyzer,
The Nitrogen Generator System is by air compressor system, compressed air air supply system, PSA nitrogen generator and nitrogen purification system
System, nitrogen gas supply pipe system composition,
The air compressor system is cut before setting gradually Whole oiless idling press, grade one filter according to compressed air flowing direction
Only shut-off valve before shut-off valve, cooling driers, absorption drier before valve, grade one filter, grade one filter blowdown valve, cooling driers,
Shut-off valve, secondary filter, secondary filter blowdown valve, tertiary filter, three-level mistake before absorption drier, secondary filter
Shut-off valve, compressed air reservoir, compressed air reservoir blowdown valve, compression are empty before filter blowdown valve, compressed air reservoir
Valve of gas reservoir pressure transmitter, compressed air reservoir pressure transmitter.
Since itself contains a small amount of oil, water, particulate matter in atmosphere, increase the by-pass filtration after air compressor machine
Device, secondary filter, tertiary filter are mainly used to remove a small amount of oil, particulate matter, are removed and are compressed by absorption drier
Water in air guarantees cleanliness, the aridity of compressed air.
The compressed air reservoir pressure transmitter signal is introduced into the start-up and shut-down control logic of Whole oiless idling press, works as pressure
When the pressure of contracting air storage tank reaches high alarming value, stop the operation of oilless air compressor, when the pressure of compressed air reservoir
When dropping to low alarming value, start the operation of oilless air compressor, realizes the automatic start-stop of oilless air compressor, accomplish Energy Saving Control.
The compressed air air supply system successively includes compressed air reservoir, compressed air according to the direction that air flows
Shut-off valve and steam line before reservoir outlet shut-off valve, PSA nitrogen generator,
Before the nitrogen making machine and purification system set gradually PSA nitrogen generator, nitrogen purifier according to air-flow direction
Shut-off valve before shut-off valve, nitrogen purifier, nitrogen air accumulator, nitrogen air accumulator, valve of nitrogen air accumulator pressure transmitter,
Nitrogen air accumulator pressure transmitter, nitrogen air accumulator blowdown valve.
PSA nitrogen generator is selectively adsorbed using the dedicated carbon molecular sieve adsorbent loaded in tower falls compressed air CO2, CO
Etc. foreign gases component, the nitrogen gas purity of generation reach 99.99%, the purity of nitrogen can be with after nitrogen purifier is handled
Reach 99.999%.
The nitrogen air accumulator pressure transmitter pressure signal introduces PSA nitrogen generator control logic, when nitrogen air accumulator pressure
When power reaches high alarming value, stop the operation of PSA nitrogen generator, when the pressure of nitrogen air accumulator drops to low alarming value, starting
The operation of PSA nitrogen generator realizes the automatic start-stop of PSA nitrogen generator, accomplishes Energy Saving Control.
The nitrogen gas supply pipe system sets gradually nitrogen reservoir outlet shut-off valve, unidirectional according to nitrogen flow direction
Valve, valve of supply air line nitrogen pressure transmitter, supply air line nitrogen pressure transmitter, CEMS instrument purge gass intake valve.
Bottled nitrogen station, gas supply electromagnetic valve, confession is once arranged according to nitrogen flow direction in the bottled nitrogen air supply system
Pneumoelectric magnet valve bypasses shut-off valve, check valve, valve of supply air line nitrogen pressure transmitter, supply air line nitrogen pressure pick-up
Device, CEMS instrument purge gass intake valve.
The supply air line nitrogen pressure transmitter real time monitoring gas supply pipe system purges atmospheric pressure, when the nitrogen is sent out
When the raw device system failure, instrument purge gass pressure reduction, when pressure reduction to CEMS instrument provides purging atmospheric pressure or less, touching
The low alarm of hair purging atmospheric pressure simultaneously opens bottled nitrogen air supply system solenoid valve, and bottled nitrogen air supply system puts into operation immediately,
Prevent purge gass interruption from jeopardizing equipment safety；When the bottled nitrogen air supply system nitrogen is used up, instrument purge gass pressure reduction,
When pressure reduction alarm setting value low to CEMS instrument purging atmospheric pressure, the low warning reminding maintenance personnel of triggering purging atmospheric pressure
Replacement bottled nitrogen in time.
The pressure setting of the compressed air reservoir pressure transmitter need to meet the requirement of PSA nitrogen generator.
It is low that the low alarm pressure setting value of the supply air line nitrogen pressure transmitter is less than nitrogen air accumulator transmitter pressure
Alarm setting value false alarm and opens by mistake bottled nitrogen air supply system solenoid valve when avoiding pressure set points identical.
When the bottled nitrogen air supply system solenoid valve failure, monitoring system triggers sound-light alarm and reminds maintenance personnel timely
It checks, bottled nitrogen air supply system solenoid valve bypass shut-off valve can be opened when using bottled nitrogen air supply system, does not influence to supply
Gas.
The effect of the check valve be make nitrogen can only one-way flow, avoid nitrogen from flowing backwards.
Beneficial effects of the present invention:The present invention proposes that a kind of power-plant flue gas on-line continuous monitoring system (CEMS) purge gass supply
Gas system, purge gass system are made of Nitrogen Generator System and bottled nitrogen air supply system, bottled nitrogen air supply system conduct
The bailout gas of Nitrogen Generator System, when Nitrogen Generator System failure, nitrogen steam line pressure is gradually decreased, and is reduced
When alarm pressure setting value low to CEMS instrument purge gass, the low alarm of triggering purging atmospheric pressure simultaneously opens bottled nitrogen air supply system
Solenoid valve, bottled nitrogen air supply system put into operation immediately, prevent purge gass from interrupting, and can provide incessantly to analyzer high
The purge gass of quality, it is ensured that the cleaning of analyzer eyeglass and drying so that it is guaranteed that analyzer monitoring data Stability and veracity,
Efficiently solving the prior art, there are problems.
Detailed description of the invention
Fig. 1 is the structural scheme of mechanism of one embodiment of the prior art
Fig. 2 is the structural scheme of mechanism of another embodiment of the prior art
Fig. 3 is the structural scheme of mechanism of one embodiment proposed by the present invention
1. Whole oiless idling press
2. shut-off valve before grade one filter
3. grade one filter
4. grade one filter blowdown valve
5. shut-off valve before cooling driers
6. cooling driers
7. shut-off valve before absorption drier
8. absorption drier
9. shut-off valve before secondary filter
10. secondary filter
11. secondary filter blowdown valve
12. tertiary filter
13. tertiary filter blowdown valve
14. shut-off valve before compressed air reservoir
15. compressed air reservoir
16. compressed air reservoir blowdown valve
17. valve of compressed air reservoir pressure transmitter
18. compressed air reservoir pressure transmitter
19. compressed air reservoir outlet shutoff valve
Shut-off valve before 20.PSA nitrogen making machine
21.PSA nitrogen making machine
22. shut-off valve before nitrogen purifier
23. nitrogen purifier
24. shut-off valve before nitrogen air accumulator
25. nitrogen air accumulator
26. valve of nitrogen air accumulator pressure transmitter
27. nitrogen air accumulator pressure transmitter
28. nitrogen air accumulator blowdown valve
29. nitrogen reservoir outlet shut-off valve
30. check valve
31. bottled nitrogen station
32. gas supply electromagnetic valve
33. gas supply electromagnetic valve bypasses shut-off valve
34. check valve
35. valve of supply air line nitrogen pressure transmitter
36. supply air line nitrogen pressure transmitter
37.CEMS instrument purges intake valve
38. compressed air steam line
Specific embodiment
Fig. 1 is the structure chart of prior art one embodiment.It is shown in Fig. 1, in the prior art CEMS instrument purge gass system
System, including end before shut-off valve 2, grade one filter 3, grade one filter blowdown valve 4, cooling driers before air compressor machine 1, grade one filter
Shut-off valve 9, secondary filtration before shut-off valve 7, absorption drier 8, secondary filter before valve 5, cooling driers 6,7 absorption driers
End before device 10, secondary filter blowdown valve 11, tertiary filter 12, tertiary filter blowdown valve 13, compressed air reservoir
Valve 14, compressed air reservoir 15, compressed air reservoir blowdown valve 16, compressed air reservoir outlet shutoff valve 19, CEMS
Instrument purge gass intake valve 37, this system is using compressed air for instrument in factory as CEMS instrument purge gass.
This technology there are the problem of：Compressed air for instrument oil-containing, water：Since power plant's compressed air for instrument usage amount is special
Greatly, therefore power plant generallys use exhaust end base of oil injection threaded bolt type air compressor machine to produce compressed air, and a series of mating air post-processings of setting are set
Standby moisture content, oil content to remove compressed air, reaches the quality of instrument gas, due to air compressor machine attribute question itself, post-processing
Equipment can only accomplish to remove 99.99% moisture content, oil content in compressed air, not accomplish 100% removal, use pair in the short time
CEMS instrumental effects are smaller, but the lens contamination of interferometer is caused analyzer to be surveyed by the oil of rear compressed air accumulative for a long time, water
Amount results abnormity fluctuation and be easy it is exceeded, seriously affect power plant safety production.
Fig. 2 is that another example structure figure, Fig. 2 are shown in the prior art, the bottled nitrogen air supply system of the prior art
It mainly include bottled nitrogen station 31, gas supply shut-off valve 33, CEMS instrument purge gass intake valve 37.
This technology there are the problem of：Outsourcing bottled nitrogen period length, quality cannot be guaranteed：One CEMS instrument purge gas
Air consumption is 40L/D, and when buying requires purity >=99.99% of bottled nitrogen, but goes detection to purchase currently without means
The purity of nitrogen oil content and water content and nitrogen, if the bad direct pollution analyzer of quality, there are certain hidden danger；It is right
It is more in the bottled nitrogen quantity that the big power plant of air consumption purchases every time, factory of many large size cities all without generating special gas
Family, is all producer's production procurement from adjacent cities, therefore delivery cycle is longer, in fact it could happen that in emergency circumstances gas supply interrupts
Situation.
Fig. 3 is one embodiment proposed by the present invention, and Fig. 3 is shown, in this example, a kind of power-plant flue gas on-line continuous monitoring system
System (CEMS) purge gass air supply system, CEMS purge gass air supply system is by Nitrogen Generator System and bottled nitrogen air supply system group
At providing the nitrogen of purging from the Nitrogen Generator System and the parallel connection of bottled nitrogen air supply system to CEMS analyzer.
Nitrogen Generator System is by air compressor system, compressed air air supply system, nitrogen making machine and nitrogen purifying system, nitrogen
Gas supply pipe system composition.
Air compressor system ends before setting gradually Whole oiless idling press 1, grade one filter according to compressed air flowing direction
End before shut-off valve 5, cooling driers 6,7 absorption driers before valve 2, grade one filter 3, grade one filter blowdown valve 4, cooling driers
Shut-off valve 9, secondary filter 10, secondary filter blowdown valve 11, three-level mistake before valve 7, absorption drier 8, secondary filter
Shut-off valve, compressed air reservoir 15, compressed air storage before filter 12, tertiary filter blowdown valve 13, compressed air reservoir
Gas tank blowdown valve 16, valve 17 of compressed air reservoir pressure transmitter, compressed air reservoir pressure transmitter 18.
Since itself contains a small amount of oil, water, particulate matter in atmosphere, increase the grade one filter after air compressor machine
3, secondary filter 10, tertiary filter 13 are mainly used to remove a small amount of oil, particulate matter, are removed by absorption drier 8
Water in compressed air guarantees the aridity of compressed air.
18 pressure signal of compressed air reservoir pressure transmitter introduces the start-up and shut-down control logic of Whole oiless idling press 1
In, when the pressure of compressed air reservoir 15 reaches high alarming value, stop the operation of oilless air compressor 1, when compressed air is stored up
When the pressure of gas tank 15 drops to low alarming value, starts the operation of oilless air compressor 1, the automatic of oilless air compressor 1 may be implemented
Energy Saving Control is accomplished in start and stop.
The direction that compressed air air supply system is flowed according to air successively includes compressed air reservoir 15, compressed air storage
Shut-off valve 20 and steam line 38 before gas tank outlet shut-off valve 19, PSA nitrogen generator.
Nitrogen making machine and purification system are cut before setting gradually PSA nitrogen generator 21, nitrogen purifier according to nitrogen flow direction
Only shut-off valve 24, nitrogen air accumulator 25, nitrogen air accumulator pressure transmitter before valve 22, nitrogen purifier 23, nitrogen air accumulator
Valve 26, nitrogen air accumulator pressure transmitter 27, nitrogen air accumulator blowdown valve 28.
PSA nitrogen generator selectively adsorbed using the dedicated carbon molecular sieve adsorbent loaded in tower fall CO2 in compressed air,
The foreign gases component such as CO, the nitrogen gas purity of generation reach 99.99%, and the purity of nitrogen can after nitrogen purifier is handled
To reach 99.999%.
27 pressure signal of nitrogen air accumulator pressure transmitter introduces 21 start-up and shut-down control logic of PSA nitrogen generator, the PSA
Nitrogen making machine 21 is selectively adsorbed using the dedicated carbon molecular sieve adsorbent loaded in tower falls the foreign gases component such as O2, CO2, produces
Raw nitrogen gas purity reaches 99.99%, and the purity of nitrogen can achieve 99.999% after the processing of nitrogen purifier 23.
When 25 pressure of nitrogen air accumulator reaches high alarming value, stop the operation of PSA nitrogen generator 21, when nitrogen gas storage
When the pressure of tank 25 drops to low alarming value, start the operation of PSA nitrogen generator 21, opening automatically for PSA nitrogen generator 21 may be implemented
Stop, accomplishes Energy Saving Control.
The nitrogen gas supply pipe system sets gradually nitrogen reservoir outlet shut-off valve 29, list according to nitrogen flow direction
To valve 30, valve 35 of supply air line nitrogen pressure transmitter, supply air line nitrogen pressure transmitter 36, CEMS instrument purge gass
Intake valve 37.
Bottled nitrogen station 31, gas supply electromagnetic valve is once arranged according to nitrogen flow direction in the bottled nitrogen air supply system
32, gas supply electromagnetic valve bypasses shut-off valve 33, check valve 34, valve 35 of supply air line nitrogen pressure transmitter, supply air line nitrogen
Air pressure power transmitter 36, CEMS instrument purge gass intake valve 37.
The supply air line pressure transmitter 36 monitors the purging atmospheric pressure of nitrogen gas supply pipe system in real time, when nitrogen is sent out
When the raw device system failure, instrument purge gass pressure reduction, when pressure reduction to CEMS instrument provides purging atmospheric pressure or less, touching
The low alarm of hair purging atmospheric pressure simultaneously opens bottled nitrogen air supply system solenoid valve 32, and bottled nitrogen air supply system puts into fortune immediately
Row prevents purge gass interruption from jeopardizing equipment safety；When the bottled nitrogen air supply system nitrogen is used up, instrument purge gass pressure drop
It is low, when pressure reduction to CEMS instrument provides purging atmospheric pressure or less, the low warning reminding maintenance personnel of triggering purging atmospheric pressure
Replacement bottled nitrogen in time.
The pressure setting of the compressed air reservoir pressure transmitter 18 need to meet the requirement 21 of PSA nitrogen generator.
The low alarm pressure setting value of the supply air line purge gass pressure transmitter 36 is less than nitrogen air accumulator transmitter 27
Pressure low alarm setting value false alarm and opens by mistake bottled nitrogen air supply system solenoid valve 32 when avoiding pressure set points identical.
When nitrogen air supply system 32 failure of solenoid valve, monitoring system triggering sound-light alarm reminds maintenance personnel to examine in time
It looks into, bottled nitrogen air supply system solenoid valve bypass shut-off valve 33 can be opened when using bottled nitrogen air supply system, does not influence to supply
Gas.
The check valve 30, check valve 34 act on nitrogen can only one-way flow, avoid nitrogen from flowing backwards.
Claims (6)
1. a kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas, characterized in that purge gass gas supply system
System is made of Nitrogen Generator System and bottled nitrogen air supply system, by the Nitrogen Generator System and bottled nitrogen gas supply system
System is in parallel to provide the nitrogen of purging to analyzer,
The Nitrogen Generator System by air compressor system, compressed air air supply system, PSA nitrogen generator and nitrogen purifying system,
Nitrogen gas supply pipe system composition,
The air compressor system is cut before setting gradually Whole oiless idling press (1), grade one filter according to compressed air flowing direction
Only shut-off valve (5), cooling driers (6), absorption type before valve (2), grade one filter (3), grade one filter blowdown valve (4), cooling driers
Shut-off valve (9), secondary filter (10), second level mistake before shut-off valve (7), absorption drier (8), secondary filter before drying machine
Shut-off valve before filter blowdown valve (11), tertiary filter (12), tertiary filter blowdown valve (13), compressed air reservoir
(14), compressed air reservoir (15), compressed air reservoir blowdown valve (16), compressed air reservoir pressure transmitter are primary
Valve (17), compressed air reservoir pressure transmitter (18),
The compressed air air supply system successively includes compressed air reservoir (15), compressed air according to the direction that air flows
Shut-off valve (20) and steam line (38) before reservoir outlet shut-off valve (19), PSA nitrogen generator,
Before the nitrogen making machine and purification system set gradually PSA nitrogen generator (21), nitrogen purifier according to air-flow direction
Shut-off valve (24), nitrogen air accumulator (25), nitrogen air accumulator before shut-off valve (22), nitrogen purifier (23), nitrogen air accumulator
Valve (26) of pressure transmitter, nitrogen air accumulator pressure transmitter (27), nitrogen air accumulator blowdown valve (28),
The nitrogen gas supply pipe system sets gradually nitrogen reservoir outlet shut-off valve (29), unidirectional according to nitrogen flow direction
Valve (30), valve (35) of supply air line nitrogen pressure transmitter, supply air line nitrogen pressure transmitter (36), CEMS instrument are blown
Scavenging intake valve (37).
Bottled nitrogen station (31), gas supply electromagnetic valve is once arranged according to nitrogen flow direction in the bottled nitrogen air supply system
(32), gas supply electromagnetic valve bypass shut-off valve (33), check valve (34), valve (35) of supply air line nitrogen pressure transmitter, confession
Air pipe nitrogen pressure transmitter (36), CEMS instrument purge gass intake valve (37).
2. the purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas according to claim 1, characterized in that institute
It states compressed air reservoir pressure transmitter (18) signal to be introduced into the start-up and shut-down control logic of Whole oiless idling press (1), works as compression
When the pressure of air storage tank (15) reaches high alarming value, stops the operation of Whole oiless idling press (1), work as compressed air reservoir
(15) when pressure drops to low alarming value, start the operation of Whole oiless idling press (1), realize Whole oiless idling press (1) oneself
Dynamic start and stop, accomplish Energy Saving Control.
3. the purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas according to claim 1, characterized in that institute
It states nitrogen air accumulator pressure transmitter (27) pressure signal and introduces PSA nitrogen generator (21) control logic, when nitrogen air accumulator (25)
When pressure reaches high alarming value, stop the operation of PSA nitrogen generator (21), when the pressure of nitrogen air accumulator (25) drops to low alarm
When value, start the operation of PSA nitrogen generator (21), realizes the automatic start-stop of PSA nitrogen generator (21), Energy Saving Control.
4. the purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas according to claim 1, characterized in that institute
Supply air line nitrogen pressure transmitter (36) real time monitoring nitrogen gas supply pipe system purging atmospheric pressure is stated,
When the Nitrogen Generator System failure, instrument purge gass pressure reduction, when pressure reduction is blown to CEMS instrument regulation
When below scavenging pressure, the low alarm of triggering purging atmospheric pressure simultaneously opens bottled nitrogen air supply system solenoid valve (32), bottled nitrogen
Air supply system puts into operation immediately, prevents purge gass interruption from jeopardizing equipment safety；
When the bottled nitrogen air supply system nitrogen is used up, instrument purge gass pressure reduction, when pressure reduction to CEMS instrument
When purging the low alarm setting value of atmospheric pressure, the low warning reminding maintenance personnel of triggering purging atmospheric pressure replaces bottled nitrogen in time.
5. the purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas according to claim 1, characterized in that institute
The low alarm pressure setting value of supply air line nitrogen pressure transmitter (36) is stated less than the low report of nitrogen air accumulator transmitter (27) pressure
Alert setting value.
6. the purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas according to claim 1, characterized in that institute
When stating nitrogen air supply system solenoid valve (32) failure, monitoring system triggering sound-light alarm reminds maintenance personnel to check in time, uses
Bottled nitrogen air supply system solenoid valve bypass shut-off valve (33) can be opened when bottled nitrogen air supply system, do not influence to supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046753.0A CN108918789A (en) | 2018-09-08 | 2018-09-08 | A kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046753.0A CN108918789A (en) | 2018-09-08 | 2018-09-08 | A kind of purge gass air supply system of the continuous on-line monitoring system of power-plant flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111974773A (en) * | 2019-05-23 | 2020-11-24 | 中国科学院大连化学物理研究所 | Method for cleaning air bag for collecting exhaled air |
| CN113567616A (en) * | 2021-06-16 | 2021-10-29 | 上海中船三井造船柴油机有限公司 | Device and method for purging and air-tight test of gas pipeline of LGIP (light emitting diode) host |
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Application publication date: 20181130 |