CN109001347A - VOC on-Line Monitor Device and its fault detection method in flue gas - Google Patents
VOC on-Line Monitor Device and its fault detection method in flue gas Download PDFInfo
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- CN109001347A CN109001347A CN201811310833.2A CN201811310833A CN109001347A CN 109001347 A CN109001347 A CN 109001347A CN 201811310833 A CN201811310833 A CN 201811310833A CN 109001347 A CN109001347 A CN 109001347A
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Abstract
The invention discloses VOC on-Line Monitor Device in a kind of flue gas and its fault detection methods, belong to flue gas monitoring technical field.VOC on-Line Monitor Device includes sequentially connected hot type sampling probe, heating box, gas chromatograph, the first aspiration pump, level-one heat tracing pipe is equipped between hot type sampling probe and heating box, the on-Line Monitor Device further includes the second aspiration pump, the exhaust outlet of second aspiration pump is connected to level-one heat tracing pipe, and method includes: the time interval obtained between current time and last self-test time；If time interval reached from the overhaul period, the first valve for controlling hot type sampling probe and flue junction is closed, and the second valve of control heating box, gas chromatograph junction is closed；It controls the pumping of the second aspiration pump and reaches scheduled duration；If the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to predetermined threshold, the first prompt information for prompting sampling line gas leakage is shown；The detection efficiency for improving VOC monitoring device is achieved the effect that.
Description
Technical field
The present invention relates to flue gas monitoring technical field, in particular to VOC on-Line Monitor Device and its event in a kind of flue gas
Hinder detection method.
Background technique
VOC is the abbreviation of volatile organic compounds (volatile organic compounds), and VOC type is more, point
Cloth is wide, is a kind of atmosphere pollution for seriously endangering environmental ecology and human health, and most of VOC has toxicity, irritation, very
It to carcinogenesis, and is easy and photochemical reaction occurs for nitrogen oxides, forms photochemical fog, cause secondary pollution.
VOC monitoring device is when occurring to detect failure, usually by experienced technical staff according to VOC monitoring device table
The fault message revealed determines failure, however the technical staff of experience can not determine the failure of VOC monitoring device, fault detection
Inefficiency.
Summary of the invention
Detection efficiency in order to solve the problems, such as VOC monitoring device in the prior art is low, the embodiment of the invention provides
VOC on-Line Monitor Device and its fault detection method in a kind of flue gas.The technical solution is as follows:
In a first aspect, a kind of fault detection method of VOC on-Line Monitor Device in flue gas is provided, the VOC on-line monitoring dress
It sets including sequentially connected hot type sampling probe, heating box, gas chromatograph, the first aspiration pump, the hot type sampling is visited
Level-one heat tracing pipe, the hot type sampling probe, the heating box and the level-one companion are equipped between head and the heating box
Corresponding probe temperature control device, heating box temperature control device, heat tracing pipe temperature control device, VOC in the flue gas are respectively equipped on heat pipe
On-Line Monitor Device further includes the second aspiration pump, and the exhaust outlet of second aspiration pump is connected to the level-one heat tracing pipe, described
Method includes:
Obtain the time interval between current time and last self-test time；
If the time interval reached from the overhaul period, the first valve of the hot type sampling probe Yu flue junction is controlled
Door is closed, and the second valve of the control heating box, the gas chromatograph junction is closed；
After first valve, second valve are closed, controls the second aspiration pump pumping and reach scheduled duration, Yi Jijian
Whether the increasing value for surveying the level-one heat tracing intraductal atmospheric pressure reaches predetermined threshold；
If the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to the predetermined threshold, show for prompting sampling line gas leakage
The first prompt information.
Optionally, the method also includes: the bleeding point of second aspiration pump is connected to gas storage device, the gas
Body storage device is for storing colored gas.
Optionally, in controlling the second aspiration pump pumping process, the method also includes:
Determine the growth rate of the level-one heat tracing intraductal atmospheric pressure；
If the growth rate of the level-one heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, show for prompting sampling line
Interior the second prompt information blocked.
Optionally, the method also includes:
During the chromatographic, the chromatogram that the gas chromatograph generates is obtained；
If there are tailing peaks in the chromatogram, chromatogram column temperature is improved into a step-length；
If after chromatogram column temperature is improved a step-length, there are still hangovers in the chromatogram that the gas chromatograph generates
Peak then shows the third prompt information for prompting replacement chromatographic column.
Optionally, in controlling the second aspiration pump pumping process, the method also includes:
Determine the growth rate of the level-one heat tracing intraductal atmospheric pressure；
If the growth rate of the level-one heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, controls intended path internal fan and blow
Wind, the intended path are the hot type sampling probe, the level-one heat tracing pipe, any internal path in the heating box；
If during the fan blowing, the air velocity that the intended path interior air-flow sensor detects is lower than default stream
Speed is then shown for prompting the 4th prompt information blocked in the intended path.
Optionally, the method also includes:
During the chromatographic, the chromatogram that the gas chromatograph generates is obtained；
It is described pre- if controlling the blowing of intended path internal fan after this analysis without chromatographic peak in the chromatogram
Access is determined for any internal path in the hot type sampling probe, the level-one heat tracing pipe, the heating box；
If during the fan blowing, the air velocity that the intended path interior air-flow sensor detects is lower than default stream
Speed is then shown for prompting the 4th prompt information blocked in the intended path.
Optionally, second level heat tracing pipe is equipped between the heating box and the gas chromatograph.
Optionally, condenser is equipped between the heating box and the gas chromatograph.
Second aspect provides a kind of computer readable storage medium, is stored in the computer readable storage medium
One or more instruction, one or more than one instruction is by the processing in flue gas in VOC on-Line Monitor Device
VOC on-Line Monitor Device in flue gas involved in first aspect and any optional embodiment of first aspect is realized when device executes
Fault detection method.
The third aspect, provides VOC on-Line Monitor Device in a kind of flue gas, and described device includes:
Memory and processor；
At least one program instruction is stored in the memory；
The processor, by loading and executing at least one program instruction to realize that first aspect and first aspect are appointed
The fault detection method of VOC on-Line Monitor Device in flue gas involved in one optional embodiment.
Technical solution provided in an embodiment of the present invention has the benefit that
By obtaining the time interval between current time and last self-test time；If the time interval reaches self-test week
Phase, then the first valve for controlling hot type sampling probe and flue junction are closed, and control heating box, gas chromatograph connect
The second valve for meeting place is closed；After first valve, the second valve are closed, control the second aspiration pump pumping reaches scheduled duration, with
And whether the increasing value of detection level-one heat tracing intraductal atmospheric pressure reaches predetermined threshold；If the increasing value of level-one heat tracing intraductal atmospheric pressure is not
Reach predetermined threshold, then shows the first prompt information for prompting sampling line gas leakage；Solves VOC monitoring in the related technology
The low problem of the detection efficiency of device；The detection efficiency for improving VOC monitoring device is achieved the effect that.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of VOC on-Line Monitor Device provided by one embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram for VOC on-Line Monitor Device that another embodiment of the present invention provides；
Fig. 3 is the method flow diagram of the fault detection method of the VOC on-Line Monitor Device provided in one embodiment of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to FIG. 1, Fig. 1 show a kind of structural schematic diagram of VOC on-Line Monitor Device provided by one embodiment of the present invention.
As shown in Figure 1, the VOC on-Line Monitor Device include sequentially connected hot type sampling probe 1, heating box 2, gas chromatograph 3,
First aspiration pump 4.Level-one heat tracing pipe 5 is equipped between the hot type sampling probe 1 and the heating box 2.The hot type takes
Sampling probe 11, blowback solenoid valve (not shown), probe sampling valve 12 are equipped in sample probe 1, the blowback solenoid valve can
Periodically to purge to gas circuit, airway blockage is prevented, reduces maintenance times, the hot type sampling probe 1 is equipped with probe
Temperature control device 13 is monitored in real time with the temperature of the fume sample to taking-up, prevents sample gas from condensing, and is based on same mesh
, the level-one heat tracing pipe 5 in the present embodiment also is provided with heat tracing pipe temperature control device 51, is carried out with the temperature to level-one heat tracing pipe 5 real
When monitor, prevent fume sample from condensing.
It is equipped with sequentially connected grade one filter 21, secondary filter 22, half way mark shut-off valve 23 in the heating box 2,
The aperture of 21 inner filter core of grade one filter is 5 μm, and the aperture of the filter core in the secondary filter 22 is 2 μm, successively right
The sample gas of process is filtered, and to remove particulate contaminant, prevents sample gas from chromatographic column is resulted in blockage and being polluted.Institute
Stating half way mark shut-off valve 23 is a kind of high temperature resistant pneumatic operated valve, is in close state in the case where equipment is in improper measuring state, with
Probe sampling valve 12 is simultaneously closed off to prevent pollutant from entering analysis gas circuit, while sample gas is enclosed in level-one heat tracing pipe 5
In, when equipment is restored normally to measure again without waiting for the time swap of too long non-sample gas, enable a device in short-term
It is interior to enter sample gas measuring phases, improve the testing efficiency of equipment.The heating box 2 is equipped with heating box temperature control device 24 to adding
The temperature of hot box 2 is monitored in real time.
At the scene of operating condition complexity, if containing more steam in sample gas, in the heating box 2 and the gas-chromatography
Condenser 7 is added between instrument 3, so that steam is condensed into drop in condenser 7, gas-liquid separation is carried out to sample, after separation
When entering back into gas chromatograph 3 to be tested and analyzed, avoid influence of the steam to gas chromatographic analysis 3, such as avoiding retaining
Between influenced to be easy to produce drift by steam, thus influence on-line monitoring repeatability and stability.
The course of work of VOC on-Line Monitor Device in the present embodiment flue gas: the first aspiration pump 4 works, the gas in flue
By hot type sampling probe 1 to sample be sampled and through level-one heat tracing pipe 5 enter heating box 2 in grade one filter 21,
Secondary filter 22 cleans, after through condenser 7 except after steam, sample gas enters gas chromatograph 3 and carries out analysis survey
Fixed, the present embodiment hot type sampling probe 1, level-one heat tracing pipe 5 are equipped with corresponding temperature control device in heating box 2, control temperature
At 120 DEG C or more, to guarantee the temperature of gaseous sample in sampling and sample transfer process, sample gas is made to enter gas-chromatography
There is no cold spot before instrument 3, improves analysis service life and the accuracy of test of gas chromatograph 3.
The setting of the present embodiment probe sampling valve 12, half way mark shut-off valve 23, so that closing and visiting when equipment breaks down
Head sampling valve 21 and half way mark shut-off valve 23, to prevent pollutant from entering analysis gas circuit, while being enclosed in level-one for sample gas
In heat tracing pipe 5, when equipment is restored normally to measure again without waiting for the time swap of too long non-sample gas, enable the device to
Enter sample gas measuring phases in enough short time, improves the testing efficiency of equipment.
The shape of probe sampling valve 12, half way mark shut-off valve 23 in the embodiment of the present invention is only to illustrate, can be according to specific
Service condition is set to two-way valve, triple valve and multiple-way valve.
Referring to FIG. 2, Fig. 2 show a kind of structural representation of VOC on-Line Monitor Device of another embodiment of the present invention offer
Figure.As shown in Fig. 2, the VOC on-Line Monitor Device includes sequentially connected hot type sampling probe 1, heating box 2, gas-chromatography
Instrument 3, the first aspiration pump 4.Level-one heat tracing pipe 5, the heating are equipped between the hot type sampling probe 1 and the heating box 2
Second level heat tracing pipe 6 is equipped between box 2 and the gas chromatograph 3.The setting of the level-one heat tracing pipe 5 and second level heat tracing pipe 6, can
To prevent the band liquid gas in gas circuit from condensing and then blocking gas circuit, the service life of gas chromatograph 3 is influenced.
Sampling probe 11, blowback solenoid valve (not shown), probe sampling valve are equipped in the hot type sampling probe 1
12, the blowback solenoid valve can periodically purge gas circuit, prevent airway blockage, reduce maintenance times.The hot type
Sampling probe 1 is equipped with probe temperature control device 13, is monitored in real time with the temperature of the fume sample to taking-up, prevents sample gas
Body condensation is based on same purpose, and the level-one heat tracing pipe 5 in the present embodiment also is provided with heat tracing pipe temperature control device 51, to level-one
The temperature of heat tracing pipe 5 is monitored in real time, prevents fume sample from condensing.
It is equipped with sequentially connected grade one filter 21, secondary filter 22, half way mark shut-off valve 23 in the heating box 2,
The aperture of 21 inner filter core of grade one filter is 5 μm, and the aperture of the filter core in the secondary filter 22 is 2 μm, successively right
The sample gas of process is filtered, and to remove particulate contaminant, prevents sample gas from chromatographic column is resulted in blockage and being polluted.
The half way mark shut-off valve 23 is a kind of high temperature resistant pneumatic operated valve, in the case where equipment is in improper measuring state in pass
Closed state simultaneously closes off to prevent pollutant from entering analysis gas circuit with probe sampling valve 12, while sample gas is enclosed in one
In grade heat tracing pipe 5, when equipment is restored normally to measure again without waiting for the time swap of too long non-sample gas, so that equipment
Sample gas measuring phases can be entered in short time, improve the testing efficiency of equipment.The heating box 2 is filled equipped with heating box temperature control
The temperature for setting 24 pairs of heating box 2 monitors in real time.
The course of work of VOC on-Line Monitor Device in the present embodiment flue gas: the first aspiration pump 4 works, the gas in flue
By hot type sampling probe 1 to sample be sampled and through level-one heat tracing pipe 5 enter heating box 2 in grade one filter 21,
Secondary filter 22 cleans, after through second level heat tracing pipe 6 carry out analysis measurement into gas chromatograph 3, the present embodiment adds
Heat type sampling probe 1, level-one heat tracing pipe 5 are equipped with corresponding temperature control device in heating box 2, control temperature at 120 DEG C or more,
To guarantee the temperature of gaseous sample in sampling and sample transfer process, so that it is not had cold spot before entering gas chromatograph 3, mention
The analysis service life of high gas chromatograph 3 and the accuracy of test.
The setting of the present embodiment probe sampling valve 12, half way mark shut-off valve 23, so that closing and visiting when equipment breaks down
Head sampling valve 12 and half way mark shut-off valve 23, to prevent pollutant from entering analysis gas circuit, while being enclosed in level-one for sample gas
In heat tracing pipe 5, when equipment is restored normally to measure again without waiting for the time swap of too long non-sample gas, enable the device to
Enter sample gas measuring phases in enough short time, improves the testing efficiency of equipment.
In addition, VOC on-Line Monitor Device further includes the second aspiration pump (not shown) in flue gas provided by the present application, second is taken out
The exhaust outlet of air pump is connected to level-one heat tracing pipe, and VOC on-Line Monitor Device can whether there is failure inside periodically self-test in flue gas,
It can specifically be realized by the fault detection method of VOC on-Line Monitor Device in flue gas as shown in Figure 3.As shown in figure 3, the VOC
The fault detection method of on-Line Monitor Device may include:
Step 310, the time interval between current time and last self-test time is obtained.
Optionally, the self-test time is recorded after each self-test of VOC on-Line Monitor Device.
The specific implementation of this step can be with are as follows: VOC on-Line Monitor Device executes step 310 when receiving off signal
To step 340；If sampling line gas leakage is not detected, can be shut down according to off signal.Wherein, sampling line refers to
Pipeline between flue and gas chromatograph.
Step 320, if the time interval reached from the overhaul period, hot type sampling probe and flue junction are controlled
First valve is closed, and the second valve of control heating box, gas chromatograph junction is closed.
Wherein, it can be set by system developer from the overhaul period, also be can be customized by users.For example, user can set
It is 30 days from the overhaul period.
In one example, not set other pipelines, heating box and gas chromatograph between heating box and gas chromatograph
Junction be provided with the second valve.Then VOC on-Line Monitor Device is closed by the first valve of control and the second valve, makes cigarette
Sampling access between road, gas chromatograph keeps closed.
In another example, second level heat tracing pipe is connected between heating box and gas chromatograph, then second level heat tracing pipe with
The junction of gas chromatograph is provided with the second valve.Then VOC on-Line Monitor Device passes through the first valve of control and the second valve
Door is closed, and the sampling access between flue, gas chromatograph is made to keep closed.
In another example, condenser is connected between heating box and gas chromatograph, then condenser and gas-chromatography
The junction of instrument is provided with the second valve.Then VOC on-Line Monitor Device is closed by the first valve of control and the second valve, is made
Sampling access between flue, gas chromatograph keeps closed.
Step 330, after the first valve, the second valve are closed, control the second aspiration pump pumping reaches scheduled duration, Yi Jijian
Whether the increasing value for surveying level-one heat tracing intraductal atmospheric pressure reaches predetermined threshold.
Wherein, scheduled duration is usually set by system developer, such as system developer can be according to the first valve,
The pumping velocity setting of the space size and the second aspiration pump in access is sampled between two valves；Predetermined threshold is generally also by being
Unite developer setting, such as system developer can by many experiments determine place the second aspiration pump be evacuated reach scheduled duration
When level-one heat tracing intraductal atmospheric pressure increasing value obtain predetermined threshold.
The realization of this step can be with are as follows: is provided with pressure sensor in level-one heat tracing pipe；It is obtained when the second pumping pump startup
The first pressure value that pressure sensor detects；When the pumping of the second aspiration pump reaches scheduled duration, the pressure sensor is obtained
The second pressure value detected, the difference calculated between second pressure value and first pressure value obtain level-one heat tracing intraductal atmospheric pressure
Increasing value.
Step 340, it if the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to predetermined threshold, shows for prompting sampling
First prompt information of pipeline gas leakage.
If the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to predetermined threshold, show in sampling line there are gas leakage,
The first prompt information for prompting sampling line gas leakage is shown in display screen, alternatively, sending according to preset contact method
First prompt information.Wherein, contact method said here can be mailbox, instant messaging account, cell-phone number etc., this implementation
Example is not especially limited this.
Optionally, after showing first prompt information, alternatively, believing sending the first prompt according to preset contact method
After breath, shut down according to off signal.
In conclusion method provided in an embodiment of the present invention, by obtaining between current time and last self-test time
Time interval；If the time interval reached from the overhaul period, the first of hot type sampling probe and flue junction is controlled
Valve is closed, and the second valve of control heating box, gas chromatograph junction is closed；First valve, the second valve are closed
Afterwards, the pumping of the second aspiration pump of control reaches scheduled duration, and whether the increasing value of detection level-one heat tracing intraductal atmospheric pressure reaches pre-
Determine threshold value；If the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to predetermined threshold, show for prompting sampling line gas leakage
The first prompt information；Solve the problems, such as that the detection efficiency of VOC monitoring device in the related technology is low；Raising VOC is reached
The effect of the detection efficiency of monitoring device.
Optionally, the bleeding point of the second aspiration pump is connected to gas storage device, and the gas storage device is for storing coloured gas
Body, so that technical staff determines Gas leak position according to the colored gas revealed from air-leak section, so that it is determined that the component of gas leakage carries out
Replacement.
Optionally, in controlling the second aspiration pump pumping process, the growth rate of level-one heat tracing intraductal atmospheric pressure is also determined；If one
The growth rate of grade heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, then shows for prompting to block in sampling line
Two prompt informations.Wherein, pre-set velocity threshold value can be set by system developer, such as system developer can be by multiple
Experiment determines that the sampling line the do not revealed level-one heat tracing intraductal atmospheric pressure in the second aspiration pump course of work most increases
Long speed obtains pre-set velocity threshold value.
Optionally, it is provided with chromatographic column temperature control device at chromatographic column, during chromatographic, obtains gas chromatograph
The chromatogram of generation；If whether there is tailing peak in chromatogram, chromatogram column temperature will be mentioned using chromatographic column temperature control device
A high step-length is increased to predetermined temperature；If by chromatogram column temperature improve a step-length or be increased to agreement temperature it
Afterwards, tailing peak is still had in the chromatogram that gas chromatograph generates, then shows the third prompt for prompting replacement chromatographic column
Information.Wherein, step-length is usually set by system developer.
It should be understood that if in chromatogram whether there is tailing peak, there may be chromatogram column temperature it is too low and/or
The problem of chromatographic column fails；If after chromatogram column temperature is improved a step-length or height predetermined temperature, gas chromatograph is raw
At chromatogram in still have tailing peak, then show that chromatographic column is no longer valid, at this point, showing for prompt to replace chromatographic column
Third prompt information.
Optionally, in controlling the second aspiration pump pumping process, the growth rate of level-one heat tracing intraductal atmospheric pressure is determined；If level-one
The growth rate of heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, then controls the blowing of intended path internal fan, intended path can be with
For any internal path in hot type sampling probe, level-one heat tracing pipe, heating box；If during fan blowing, intended path
The air velocity that interior air-flow sensor detects is lower than preset flow rate, then shows for prompting the block in intended path the 4th to mention
Show information.Wherein, preset flow rate is usually set by system developer, such as system developer can test in the intended path
Without under stopping state, and the minimum air flow speed that gas flow transducer detects when fan is dried obtains preset flow rate.
In actual implementation, intended path internal fan may be disposed at the junction of the access and other component, air-flow sensing
Device is set in the access.
Optionally, during chromatographic, the chromatogram that gas chromatograph generates is obtained；If colourless in chromatogram
Spectral peak then controls the blowing of intended path internal fan after this analysis, and intended path can be hot type sampling probe, one
Any internal path in grade heat tracing pipe, heating box；If intended path interior air-flow sensor detects during fan blowing
Air velocity is lower than preset flow rate, then shows for prompting the 4th prompt information blocked in intended path.
A kind of computer readable storage medium that one embodiment of the invention also provides stores in the computer readable storage medium
There is one or more instruction, one or more than one instruction is by the place in flue gas in VOC on-Line Monitor Device
Reason device realizes the fault detection method of VOC on-Line Monitor Device in flue gas involved in any of the above-described embodiment when executing.
VOC on-Line Monitor Device may include processor and memory in flue gas in the present invention, and the processor is for holding
Row computer program instructions are to complete the processors of various processes and method, and the memory is for storing program instruction, the processing
Device can be realized the event of VOC on-Line Monitor Device in flue gas involved in any of the above-described embodiment by executing the program instruction
Hinder detection method.
Term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or hidden
Quantity containing indicated technical characteristic.The feature of " first ", " second " that limit as a result, can express or implicitly include one
A or more this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or two with
On.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. the fault detection method of VOC on-Line Monitor Device in a kind of flue gas, which is characterized in that the VOC on-Line Monitor Device
Including sequentially connected hot type sampling probe, heating box, gas chromatograph, the first aspiration pump, the hot type sampling probe
Level-one heat tracing pipe, the hot type sampling probe, the heating box and the level-one heat tracing are equipped between the heating box
Corresponding probe temperature control device, heating box temperature control device, heat tracing pipe temperature control device are respectively equipped on pipe, VOC exists in the flue gas
Line monitoring device further includes the second aspiration pump, and the exhaust outlet of second aspiration pump is connected to the level-one heat tracing pipe, the side
Method includes:
Obtain the time interval between current time and last self-test time；
If the time interval reached from the overhaul period, the first valve of the hot type sampling probe Yu flue junction is controlled
Door is closed, and the second valve of the control heating box, the gas chromatograph junction is closed；
After first valve, second valve are closed, controls the second aspiration pump pumping and reach scheduled duration, Yi Jijian
Whether the increasing value for surveying the level-one heat tracing intraductal atmospheric pressure reaches predetermined threshold；
If the increasing value of level-one heat tracing intraductal atmospheric pressure is not up to the predetermined threshold, show for prompting sampling line gas leakage
The first prompt information.
2. the method according to claim 1, wherein the method also includes the pumpings of second aspiration pump
Mouth is connected to gas storage device, and the gas storage device is for storing colored gas.
3. described the method according to claim 1, wherein in controlling the second aspiration pump pumping process
Method further include:
Determine the growth rate of the level-one heat tracing intraductal atmospheric pressure；
If the growth rate of the level-one heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, show for prompting sampling line
Interior the second prompt information blocked.
4. the method according to claim 1, wherein the method also includes:
During the chromatographic, the chromatogram that the gas chromatograph generates is obtained；
If there are tailing peaks in the chromatogram, chromatogram column temperature is improved into a step-length；
If after chromatogram column temperature is improved a step-length, there are still hangovers in the chromatogram that the gas chromatograph generates
Peak then shows the third prompt information for prompting replacement chromatographic column.
5. described the method according to claim 1, wherein in controlling the second aspiration pump pumping process
Method further include:
Determine the growth rate of the level-one heat tracing intraductal atmospheric pressure；
If the growth rate of the level-one heat tracing intraductal atmospheric pressure reaches pre-set velocity threshold value, controls intended path internal fan and blow
Wind, the intended path are the hot type sampling probe, the level-one heat tracing pipe, any internal path in the heating box；
If during the fan blowing, the air velocity that the intended path interior air-flow sensor detects is lower than default stream
Speed is then shown for prompting the 4th prompt information blocked in the intended path.
6. the method according to claim 1, wherein the method also includes:
During the chromatographic, the chromatogram that the gas chromatograph generates is obtained；
It is described pre- if controlling the blowing of intended path internal fan after this analysis without chromatographic peak in the chromatogram
Access is determined for any internal path in the hot type sampling probe, the level-one heat tracing pipe, the heating box；
If during the fan blowing, the air velocity that the intended path interior air-flow sensor detects is lower than default stream
Speed is then shown for prompting the 4th prompt information blocked in the intended path.
7. method according to claim 1-6, which is characterized in that the heating box and the gas chromatograph it
Between be equipped with second level heat tracing pipe.
8. method according to claim 1-6, which is characterized in that the heating box and the gas chromatograph it
Between be equipped with condenser.
9. a kind of computer readable storage medium, one or more finger is stored in the computer readable storage medium
It enables, which is characterized in that when one or more than one instruction is executed by the processor in flue gas in VOC on-Line Monitor Device
Realize the fault detection method of VOC on-Line Monitor Device in any flue gas in claim 1 to 8.
10. VOC on-Line Monitor Device in a kind of flue gas, which is characterized in that described device includes:
Memory and processor；
At least one program instruction is stored in the memory；
The processor is realized any described in claim 1 to 8 by loading and executing at least one program instruction
Flue gas in VOC on-Line Monitor Device fault detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310833.2A CN109001347B (en) | 2018-11-06 | 2018-11-06 | VOC on-Line Monitor Device and its fault detection method in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310833.2A CN109001347B (en) | 2018-11-06 | 2018-11-06 | VOC on-Line Monitor Device and its fault detection method in flue gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109001347A true CN109001347A (en) | 2018-12-14 |
| CN109001347B CN109001347B (en) | 2019-02-01 |
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