CN209858488U - Online gas calibration switching device - Google Patents
Online gas calibration switching device Download PDFInfo
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- CN209858488U CN209858488U CN201922016783.3U CN201922016783U CN209858488U CN 209858488 U CN209858488 U CN 209858488U CN 201922016783 U CN201922016783 U CN 201922016783U CN 209858488 U CN209858488 U CN 209858488U
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Abstract
The utility model discloses an online standard gas calibration switching device, which is used for switching the standard gas of a flue gas sampling system, wherein the flue gas sampling system comprises a flue, a sampling probe, a heating box and a rear-end system which are sequentially connected, and the flue gas sampling system comprises a standard gas supply device, a full-stroke standard gas electromagnetic valve, a half-stroke standard gas electromagnetic valve and a half-stroke standard gas stop valve; a primary filter and a secondary filter which are sequentially connected in series and used for filtering the smoke collected by the sampling probe are arranged in the heating box; the half-way air-marking stop valve is connected to a serial pipeline for connecting the primary filter and the secondary filter in series; the standard gas supply device is communicated with the sampling probe through a full-range standard gas electromagnetic valve and is communicated with the part of the series pipeline between the half-range standard gas stop valve and the secondary filter through a half-range standard gas electromagnetic valve. The utility model discloses can make flue gas sampling system switch between flue gas sampling and mark gas mark very conveniently, remove the trouble of artificial change pipeline structure from, conveniently save trouble.
Description
Technical Field
The utility model relates to a auto-change over device is markd to online mark gas.
Background
The VOC is a short name for volatile organic compounds (volatile organic compounds), has many kinds of VOC and wide distribution, is an atmospheric pollutant seriously harming environmental ecology and human health, most of the VOC has toxicity, irritation and even carcinogenicity, and is easy to generate photochemical reaction with nitrogen oxides to form photochemical smog and cause secondary pollution. For VOC detection, a flue gas sampling system is generally adopted to collect flue gas, the flue gas is detected by a gas chromatography method, however, in the using process, standard gas needs to be introduced into the flue gas sampling system and a chromatograph periodically for calibration, and during calibration, the pipeline structure needs to be changed manually, so that the personnel operation is complex, the training cost is high, and the condition of system error caused by gas leakage or wrong connection is easily caused in the dismounting process.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide an online mark gas and mark auto-change over device, it can make flue gas sampling system switch between flue gas sampling and mark gas are markd very conveniently, has removed the trouble of artificial change pipeline structure from, and convenient trouble-saving.
In order to solve the technical problem, the technical scheme of the utility model is that: an on-line standard gas calibration switching device is used for switching standard gas of a flue gas sampling system, the flue gas sampling system comprises a flue, a sampling probe, a heating box and a back-end system which are connected in sequence,
comprises a standard gas supply device, a full-stroke standard gas electromagnetic valve, a half-stroke standard gas electromagnetic valve and a half-stroke standard gas stop valve; wherein the content of the first and second substances,
a primary filter and a secondary filter which are sequentially connected in series and used for filtering the smoke collected by the sampling probe are arranged in the heating box;
the half-way air-marking stop valve is connected to a serial pipeline for connecting the primary filter and the secondary filter in series so as to control the connection and disconnection between the primary filter and the secondary filter;
the standard gas supply device is communicated with the sampling probe through a whole-course standard gas electromagnetic valve and is communicated with the part of the series pipeline between the half-course standard gas stop valve and the secondary filter through a half-course standard gas electromagnetic valve.
Furthermore, in order to facilitate the connection of the standard gas supply device with the full-stroke standard gas electromagnetic valve and the half-stroke standard gas electromagnetic valve, the standard gas supply device is respectively connected with the full-stroke standard gas electromagnetic valve and the half-stroke standard gas electromagnetic valve through a three-way joint, the three-way joint is provided with a first interface, a second interface and a third interface, the first interface is connected with the standard gas supply device, the second interface is connected with the full-stroke standard gas electromagnetic valve, and the third interface is connected with the half-stroke standard gas electromagnetic valve.
Furthermore, in order to prevent the internal gas circuit from being polluted when the standard gas is replaced, the online standard gas calibration switching device further comprises a standard gas switch valve which is connected between the standard gas supply device and the first interface and is used for controlling the on-off of the standard gas supply device and the first interface.
Further, the air-marking switch valve is a manual valve.
Furthermore, the online standard gas calibration switching device also comprises a probe sample injection valve which is arranged in the sampling probe and is respectively connected with the flue, the primary filter and the whole-course standard gas electromagnetic valve; wherein the content of the first and second substances,
the probe sample introduction valve is a two-position three-way electromagnetic valve, a common port of the probe sample introduction valve is communicated with the primary filter, a normally open port of the probe sample introduction valve is communicated with the flue, and a normally closed port of the probe sample introduction valve is connected with the whole-course gas standard electromagnetic valve.
Further, the half-stroke gas-marking stop valve is a normally open electromagnetic valve;
the half-stroke gas-marking electromagnetic valve is a normally closed electromagnetic valve;
the whole-course air-marking electromagnetic valve is a normally closed electromagnetic valve.
Furthermore, in order to conveniently control the switching state of the probe sample injection valve, the half-stroke standard gas stop valve, the half-stroke standard gas electromagnetic valve and the whole-stroke standard gas electromagnetic valve, the online standard gas calibration switching device further comprises a control device which is respectively electrically connected with the probe sample injection valve, the half-stroke standard gas stop valve, the half-stroke standard gas electromagnetic valve and the whole-stroke standard gas electromagnetic valve and is used for controlling the probe sample injection valve, the half-stroke standard gas stop valve, the half-stroke standard gas electromagnetic valve and the whole-stroke standard gas electromagnetic valve to lose power.
Further, the control device is a PLC controller.
Further, the backend system includes a gas chromatograph.
After the technical scheme is adopted, when the flue gas sampling system samples the flue gas, the full-range standard gas electromagnetic valve and the half-range standard gas electromagnetic valve are closed, the half-range standard gas stop valve is opened, and the sample gas collected by the sampling probe from the flue sequentially passes through the primary filter, the half-range standard gas stop valve and the secondary filter and then enters the back-end system, so that a gas chromatograph in the back-end system can conveniently detect the sample gas; when the flue gas sampling system is subjected to half-range calibration, the half-range gas-marking electromagnetic valve is opened, the half-range gas-marking stop valve and the whole-range gas-marking electromagnetic valve are closed, and the marking gas enters the part of the flue gas sampling system behind the half-range gas-marking stop valve through the half-range gas-marking electromagnetic valve, so that the flue gas sampling system can be subjected to half-range calibration; when the full-range calibration is carried out on the flue gas sampling system, the half-range gas-marking electromagnetic valve is closed, the full-range gas-marking electromagnetic valve and the half-range gas-marking stop valve are opened, and the gas-marking sequentially passes through the full-range gas-marking electromagnetic valve, the sampling probe, the primary filter, the half-range gas-marking stop valve, the secondary filter and the rear-end system, so that the full-range calibration can be carried out on the flue gas sampling system; the utility model discloses can also pass through the state of controlling means automatic control probe sampling valve, half journey mark gas stop valve, half journey mark gas solenoid valve and whole journey mark gas solenoid valve, remove manual operation and on duty's trouble from, save the cost of labor, conveniently save trouble.
Drawings
Fig. 1 is the structure diagram of the switching device is calibrated to online gas marker.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in figure 1, the on-line standard gas calibration switching device is used for performing standard gas switching on a flue gas sampling system, the flue gas sampling system comprises a flue 1, a sampling probe, a heating box and a back-end system 2 which are connected in sequence,
comprises a standard gas supply device 3, a full-stroke standard gas electromagnetic valve 4, a half-stroke standard gas electromagnetic valve 5 and a half-stroke standard gas stop valve 6; wherein the content of the first and second substances,
a primary filter 7 and a secondary filter 8 which are sequentially connected in series and used for filtering the smoke collected by the sampling probe are arranged in the heating box;
the half-way air-marking stop valve 6 is connected to a serial pipeline for connecting the primary filter 7 and the secondary filter 8 in series so as to control the connection and disconnection between the primary filter 7 and the secondary filter 8;
the standard gas supply device 3 is communicated with the sampling probe through a whole-course standard gas electromagnetic valve 4 and is communicated with the part of the series pipeline between a half-course standard gas stop valve 6 and a secondary filter 8 through a half-course standard gas electromagnetic valve 5.
In this embodiment, in order to heat the sample gas conveniently, the sampling probe is a heating type sampling probe, and the sampling probe is communicated with the primary filter 7 through a heat tracing pipe.
In this embodiment, the pore size of the filter element of the primary filter 7 is 5 μm, and the pore size of the filter element of the secondary filter 8 is 2 μm.
Specifically, when the flue gas sampling system samples the flue gas, the whole-process standard gas electromagnetic valve 4 and the half-process standard gas electromagnetic valve 5 are closed, the half-process standard gas stop valve 6 is opened, and the sample gas collected by the sampling probe from the flue 1 sequentially passes through the primary filter 7, the half-process standard gas stop valve 6 and the secondary filter 8 and then enters the back-end system 2, so that the sample gas can be conveniently detected by a gas chromatograph in the back-end system 2; when the flue gas sampling system is subjected to half-range calibration, the half-range gas-marking electromagnetic valve 5 is opened, the half-range gas-marking stop valve 6 and the whole-range gas-marking electromagnetic valve 4 are closed, and the marking gas enters the part of the flue gas sampling system behind the half-range gas-marking stop valve 6 through the half-range gas-marking electromagnetic valve 5, so that the flue gas sampling system can be subjected to half-range calibration; carry out full journey to flue gas sampling system and mark the time, close half journey mark gas solenoid valve 5, open whole journey mark gas solenoid valve 4 and half journey mark gas stop valve 6, mark the gas and mark gas solenoid valve 4, sampling probe, primary filter 7, half journey mark gas stop valve 6, secondary filter 8 and rear end system 2 through whole journey in proper order, and then can carry out whole journey to flue gas sampling system and mark, the utility model discloses can make flue gas sampling system very conveniently at flue gas sampling, half journey mark and whole journey mark between switching, removed the trouble of artificial change pipeline and dismouting from, improved switching efficiency.
As shown in fig. 1, in order to facilitate connection of the standard gas supply device 3 with the full-stroke standard gas solenoid valve 4 and the half-stroke standard gas solenoid valve 5, the standard gas supply device 3 is respectively connected with the full-stroke standard gas solenoid valve 4 and the half-stroke standard gas solenoid valve 5 through a three-way joint, the three-way joint has a first interface, a second interface and a third interface, the first interface is connected with the standard gas supply device 3, the second interface is connected with the full-stroke standard gas solenoid valve 4, and the third interface is connected with the half-stroke standard gas solenoid valve 5.
As shown in fig. 1, in order to prevent the internal gas path from being polluted when the standard gas is replaced, the online standard gas calibration switching device further includes a standard gas switch valve 9 connected between the standard gas supply device 3 and the first interface and used for controlling the on-off of the standard gas supply device 3 and the first interface.
As shown in fig. 1, the air-marking switch valve 9 is a manual valve.
In the embodiment, when the on-line standard gas calibration switching device works, the manual valve is normally rotated to the open position.
As shown in fig. 1, the online standard gas calibration switching device further comprises a probe sample injection valve 10 disposed in the sampling probe and used for being connected to the flue 1, the primary filter 7 and the whole-course standard gas solenoid valve 4 respectively; wherein the content of the first and second substances,
the probe sample introduction valve 10 is a two-position three-way electromagnetic valve, a common port of the probe sample introduction valve is communicated with the primary filter 7, a normally open port of the probe sample introduction valve is communicated with the flue 1, and a normally closed port of the probe sample introduction valve is connected with the whole-course gas standard electromagnetic valve 4.
As shown in fig. 1, the half-stroke air-marking stop valve 6 is a normally open electromagnetic valve;
the half-stroke gas-marking electromagnetic valve 5 is a normally closed electromagnetic valve;
the whole-course air-marking electromagnetic valve 4 is a normally closed electromagnetic valve.
In this embodiment, when flue gas sampling system work, need carry out the sample gas collection, probe inlet valve 10 and half way mark gas stop valve 6 are the not on-state, and sample gas is through the normally open mouth and the public mouth of probe inlet valve 10, after the heat tracing pipe that is connected with probe inlet valve 10, after passing through primary filter 7, half way mark gas stop valve 6 and secondary filter 8 in proper order, get into back-end system 2.
When the flue gas sampling system needs half-way calibration, the half-way standard gas electromagnetic valve 5 and the half-way standard gas stop valve 6 are both in an electrified state, and standard gas sequentially passes through the standard gas switch valve 9 and the half-way standard gas electromagnetic valve 5 and then enters the flue gas sampling system, and because the half-way standard gas stop valve 6 is in an electrified closed state, the standard gas can only flow to the secondary filter 8 at the rear end to enter the rear end system 2, and cannot pollute the pipeline at the front end forwards.
When the flue gas sampling system needs to be calibrated in the whole process, the whole-process gas marking electromagnetic valve 4 and the probe sample injection valve 10 are both in an electrified state, and the standard gas sequentially passes through the normal closed port and the common port of the standard gas switch valve 9, the whole-process gas marking electromagnetic valve 4 and the probe sample injection valve 10, and then sequentially passes through the primary filter 7, the half-process gas marking stop valve 6 and the secondary filter 8, and then enters the back-end system 2.
As shown in fig. 1, in order to control the switching state of the probe sample injection valve 10, the half-stroke standard gas stop valve 6, the half-stroke standard gas electromagnetic valve 5 and the whole-stroke standard gas electromagnetic valve 4, the on-line standard gas calibration switching device further comprises a control device 11 which is electrically connected with the probe sample injection valve 10, the half-stroke standard gas stop valve 6, the half-stroke standard gas electromagnetic valve 5 and the whole-stroke standard gas electromagnetic valve 4 respectively and is used for controlling the probe sample injection valve 10, the half-stroke standard gas stop valve 6, the half-stroke standard gas electromagnetic valve 5 and the whole-stroke standard gas electromagnetic valve 4 to lose power.
In this embodiment, the control device 11 is connected to the electromagnetic coils of the probe sample injection valve 10, the half-stroke standard gas stop valve 6, the half-stroke standard gas electromagnetic valve 5 and the full-stroke standard gas electromagnetic valve 4 respectively.
Specifically, the utility model discloses can also remove manual operation and on duty's trouble from through 11 automatic control probe sampling valve 10 of control device, half journey mark gas stop valve 6, half journey mark gas solenoid valve 5 and the whole state of marking gas solenoid valve 4, save the cost of labor, conveniently save trouble.
As shown in fig. 1, the control device 11 is a PLC controller.
In this embodiment, a trigger signal is sent to the PLC controller through the upper computer system to trigger the PLC controller to control the corresponding solenoid valve switching state.
As shown in fig. 1, the backend system 2 comprises a gas chromatograph.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (9)
1. The utility model provides a auto-change over device is markd to online mark gas for carry out mark gas to flue gas sampling system and switch, flue gas sampling system includes consecutive flue (1), sampling probe, heating box and back-end system (2), its characterized in that:
comprises a standard gas supply device (3), a full-stroke standard gas electromagnetic valve (4), a half-stroke standard gas electromagnetic valve (5) and a half-stroke standard gas stop valve (6); wherein the content of the first and second substances,
a primary filter (7) and a secondary filter (8) which are sequentially connected in series and used for filtering the smoke collected by the sampling probe are arranged in the heating box;
the half-way air-marking stop valve (6) is connected to a serial pipeline for connecting the primary filter (7) and the secondary filter (8) in series to control the connection and disconnection between the primary filter (7) and the secondary filter (8);
the standard gas supply device (3) is communicated with the sampling probe through a whole-course standard gas electromagnetic valve (4) and is communicated with a part of the series pipeline between a half-course standard gas stop valve (6) and the secondary filter (8) through a half-course standard gas electromagnetic valve (5).
2. The on-line calibration gas calibration switching device according to claim 1, wherein:
the standard gas supply device (3) is respectively connected with the whole-stroke standard gas electromagnetic valve (4) and the half-stroke standard gas electromagnetic valve (5) through a three-way joint, the three-way joint is provided with a first interface, a second interface and a third interface, the first interface is connected with the standard gas supply device (3), the second interface is connected with the whole-stroke standard gas electromagnetic valve (4), and the third interface is connected with the half-stroke standard gas electromagnetic valve (5).
3. The online standard gas calibration switching device according to claim 2, wherein:
the standard gas switch valve (9) is connected between the standard gas supply device (3) and the first interface and is used for controlling the on-off of the standard gas supply device (3) and the first interface.
4. The on-line calibration gas calibration switching device according to claim 3, wherein:
the air-marking switch valve (9) is a manual valve.
5. The on-line calibration gas calibration switching device according to claim 1, wherein:
the sampling probe also comprises a probe sample injection valve (10) which is arranged in the sampling probe and is respectively connected with the flue (1), the primary filter (7) and the whole-course gas-marking electromagnetic valve (4); wherein the content of the first and second substances,
the probe sample introduction valve (10) is a two-position three-way electromagnetic valve, a common port of the probe sample introduction valve is communicated with the primary filter (7), a normally open port of the probe sample introduction valve is communicated with the flue (1), and a normally closed port of the probe sample introduction valve is connected with the whole-course gas standard electromagnetic valve (4).
6. The on-line calibration gas calibration switching device of claim 5, wherein:
the half-stroke gas-marking stop valve (6) is a normally open electromagnetic valve;
the half-stroke gas-marking electromagnetic valve (5) is a normally closed electromagnetic valve;
the whole-course air-marking electromagnetic valve (4) is a normally closed electromagnetic valve.
7. The on-line calibration gas calibration switching device of claim 6, wherein:
the device also comprises a control device (11) which is respectively electrically connected with the probe sample injection valve (10), the half-stroke standard gas stop valve (6), the half-stroke standard gas electromagnetic valve (5) and the whole-stroke standard gas electromagnetic valve (4) and is used for controlling the probe sample injection valve (10), the half-stroke standard gas stop valve (6), the half-stroke standard gas electromagnetic valve (5) and the whole-stroke standard gas electromagnetic valve (4) to lose power.
8. The on-line calibration gas calibration switching device of claim 7, wherein:
the control device (11) is a PLC controller.
9. The on-line calibration gas calibration switching device according to claim 1, wherein:
the backend system (2) comprises a gas chromatograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922016783.3U CN209858488U (en) | 2019-11-21 | 2019-11-21 | Online gas calibration switching device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922016783.3U CN209858488U (en) | 2019-11-21 | 2019-11-21 | Online gas calibration switching device |
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| CN209858488U true CN209858488U (en) | 2019-12-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111773832A (en) * | 2020-07-14 | 2020-10-16 | 中煤科工集团重庆研究院有限公司 | Gas pretreatment system with anti-turbulence and calibration functions |
| CN113030403A (en) * | 2021-05-28 | 2021-06-25 | 北京万维盈创科技发展有限公司 | Whole-course calibration type remote quality control device and method |
| CN114594217A (en) * | 2022-03-30 | 2022-06-07 | 南京分析仪器厂有限公司 | Calibration method of chemical waste gas monitoring system |
-
2019
- 2019-11-21 CN CN201922016783.3U patent/CN209858488U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111773832A (en) * | 2020-07-14 | 2020-10-16 | 中煤科工集团重庆研究院有限公司 | Gas pretreatment system with anti-turbulence and calibration functions |
| CN113030403A (en) * | 2021-05-28 | 2021-06-25 | 北京万维盈创科技发展有限公司 | Whole-course calibration type remote quality control device and method |
| CN114594217A (en) * | 2022-03-30 | 2022-06-07 | 南京分析仪器厂有限公司 | Calibration method of chemical waste gas monitoring system |
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