CN219608868U - Online multi-gas detection device - Google Patents
Online multi-gas detection device Download PDFInfo
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- CN219608868U CN219608868U CN202223172341.6U CN202223172341U CN219608868U CN 219608868 U CN219608868 U CN 219608868U CN 202223172341 U CN202223172341 U CN 202223172341U CN 219608868 U CN219608868 U CN 219608868U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model provides an online multi-gas detection device which comprises a power unit, a gas pretreatment unit and a gas detection unit, wherein the power unit is connected with the gas pretreatment unit; the gas detection unit comprises N gas filters and N gas detectors which are communicated sequentially through pipelines according to the sequence of the first gas filter, the first gas detector, the … …, the N gas filter and the N gas detector; the target gases detected by the gas detectors are different; the interference degree of each gas detector by other target gases is increased sequentially according to the sequence of the first gas detector, the second gas detector, the … … and the Nth gas detector; the first gas filter is used for removing other gases except the gases detected by the gas detector; the second gas filter is used for removing other gases except the gases detected by the second gas detector and all the gases detected by the second gas detector; the N-th gas filter is used for removing other gases except the gases detected by the N-th gas detector.
Description
Technical Field
The utility model belongs to the field of gas detection, and particularly relates to an online multi-gas detection device.
Background
With the rapid development of society, more occasions need gas detection, more and more complex gas to be detected, and the single gas detection is changed into the simultaneous detection of multiple gases. Such as power plants, chemical plants, etc., often require the simultaneous detection of multiple gases in the factory environment. The detection unit part of the current multiple gases is often used for directly detecting the target gases of the gases to be detected, and the cross interference exists due to the mutual influence between different target detection gases, so that the measurement result is seriously influenced. In addition, because the target gas to be measured often contains dust, water and the like besides the gas to be measured, if the dust, the water and the like cannot be completely removed, the accuracy of the detection result and the service life of the detection device can be seriously affected by the substances.
The utility model discloses a Chinese patent with publication number of CN215833352U, which is named as an online gas detection device for complex working conditions, and the device processes a sample gas to be detected through a gas pretreatment mechanism comprising a dust filter, an alcohol washing unit, a water washing unit and a water-vapor separation unit, so that the problem of removing dust, water, gas and other interference substances is solved, the accuracy of a detection result is improved, and the service life of the detection device is prolonged. However, the power mechanism is arranged before the gas pretreatment, and the alcohol washing unit and the water washing unit are adopted for the gas pretreatment, so that the online gas detection device is suitable for detecting toxic gas environment, and is not suitable for detecting environment in which the alcohol washing and the water washing cannot be carried out when the gas waiting to be detected in a power plant and a chemical plant; in addition, the online gas detection device directly detects target gas of the gas to be detected, and the problem of cross interference caused by the mutual influence of different target detection gases is not considered.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides an online multi-gas detection device.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides an online multi-gas detection device which comprises a power unit, a gas pretreatment unit and a gas detection unit, wherein the power unit is connected with the gas pretreatment unit;
the gas pretreatment unit comprises a water-gas separator, a dust removal coarse filter, a dust removal fine filter and a drying filter which are sequentially communicated through pipelines;
the input end of the power unit is communicated with the output end of the gas pretreatment unit through a pipeline, the output end of the power unit is communicated with the input end of the gas detection unit through a pipeline, and the power unit is used for conveying the sample gas to be detected into the gas pretreatment mechanism for pretreatment and conveying the pretreated sample gas to be detected into the gas detection unit for detection;
the gas detection unit comprises N gas filters and N gas detectors, wherein N is more than or equal to 2;
the N gas filters and the N gas detectors are sequentially communicated through pipelines according to the sequence of the first gas filter, the first gas detector, the second gas filter, the second gas detector, … …, the N gas filter and the N gas detector;
the target gases detected by the gas detectors are different;
the interference degree of each gas detector by other target gases is increased sequentially according to the sequence of the first gas detector, the second gas detector, the … … and the Nth gas detector;
the first gas filter is used for removing other gases except the gases detected by the gas detectors;
the second gas filter is used for removing the second gas detector and other gases except the gases detected by the second gas detector;
and the N gas filter is used for removing other gases except the gas detected by the N gas detector.
Based on the above, the water storage device further comprises a water storage tank and a drain valve, wherein the water inlet of the water storage tank is connected with the water outlet of the water-gas separator through a pipeline, and the water outlet of the water storage tank is connected to one end of the drain valve through a pipeline.
Based on the above, the gas bypass unit is further included; the gas bypass unit comprises a bypass restrictor valve and a bypass adjustable flowmeter arranged in a gas bypass pipeline; the gas bypass pipeline is communicated with the output end of the power unit and the input end of the gas detection unit through a three-way joint.
Based on the above, the bypass restrictor valve and the bypass adjustable flowmeter are both manually adjusted.
Based on the above, the device also comprises a gas marking gas path; the gas marking gas circuit is communicated with the output end of the power unit and the input end of the gas detection unit through the three-way ball valve and is used for introducing gas marking when the gas detector is subjected to verification and calibration operation.
Based on the above, the power unit is a vacuum electric diaphragm pump.
Based on the above, the input end of the gas detection unit is provided with a flowmeter.
Compared with the prior art, the utility model has substantial characteristics and progress, in particular to an online multi-gas detection device which is used for detecting compound gas, and can collect and measure the position gas of a diffusion detector due to inconvenience in use by combining all components; and multiple gases can be measured simultaneously. The gas at the point to be measured is connected to the device through a gas pipe, so that the safety of personnel is protected and the maintenance is convenient; the dust is removed by processing the sample gas to be detected, the humidity of the sample gas to be detected is reduced, the gas detector is prevented from being interfered by other target gas to be detected, the measurement precision and accuracy are improved, the service life of the detection element is prolonged, and the service life of the gas detector is further prolonged; the gas concentration data can be transmitted out in real time, so that information management is facilitated.
Drawings
FIG. 1 is a schematic diagram of an on-line multi-gas detection device according to the present utility model.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Example 1
As shown in fig. 1, an online multi-gas detection device comprises a detection cabinet 26, a threading connector, a power unit, a gas pretreatment unit, a gas detection unit and a gas marking gas path; the power unit, the gas pretreatment unit and the gas detection unit are all arranged in the detection cabinet 26, and the threading connector is arranged on the shell of the detection cabinet 26.
The penetrating plate connector comprises a sample gas inlet penetrating plate connector 1, a water outlet penetrating plate connector 5, a standard gas port penetrating plate connector 25 and a gas outlet penetrating plate connector 24, wherein one end of the penetrating plate connector is arranged in the detection cabinet, is connected with each gas pipeline, and the other end of the penetrating plate connector is reserved in an empty mode; the gas pretreatment unit comprises a water-gas separator 2, a water storage tank 3, a drain valve 4, a dust removal coarse filter 6, a dust removal fine filter 7 and a dry filter 8 which are sequentially communicated through pipelines; the power unit adopts a vacuum electric diaphragm pump 9; the gas marking gas path is communicated with the output end of the power unit and the input end of the gas detection unit through a three-way ball valve 14 and is used for introducing gas marking when the gas detector is subjected to verification and calibration operation; the gas detection unit comprises four gas filters and four gas detectors, and the input end of the gas detection unit is provided with a flow meter 15.
One end of a sample gas inlet through plate joint 1 is reserved in a free mode, the other end of the sample gas inlet through plate joint is connected to one end of a water-gas separator 2, a water outlet is formed in the bottom of the water-gas separator 2, the water outlet is connected to the top of a water storage tank 3, the bottom of the water storage tank 3 is connected to one end of a drain valve 4, the other end of the drain valve is connected to one end of a water outlet through plate joint 5, and the other end of the joint 5 is reserved in a free mode; the other end of the water-gas separator 2 is connected to one end of the coarse dust removal filter 6, the other end of the coarse dust removal filter 6 is connected to one end of the fine dust removal filter 7, the other end of the coarse dust removal filter 6 is connected to one end of the dry filter 8, the other end of the dry filter 8 is connected to one end of the vacuum electric diaphragm pump 9, the other end of the vacuum electric diaphragm pump 9 is connected to the left end of the three-way ball valve 14, the right end of the three-way ball valve 14 is connected to one end of the air port penetrating plate joint 25, and the other end of the air port penetrating plate joint 25 is reserved to be empty; the upper end of the three-way ball valve 14 is connected to one end of a flowmeter 15, and the other end of the flowmeter 15 is connected to the input end of a first gas filter 16;
the four gas filters and the four gas detectors are sequentially communicated through pipelines according to the sequence of the first gas filter 16, the first gas detector 17, the second gas filter 18, the second gas detector 19, the third gas filter 20, the third gas detector 21, the fourth gas filter 22 and the fourth gas detector 23; the output end of the fourth gas detector 23 is connected to the gas outlet plate penetrating connector 24;
the target gases detected by the gas detectors are different;
the interference degree of each gas detector by other target gas increases in order of the first gas detector 17, the second gas detector 19, the third gas detector 21, and the fourth gas detector 23;
a first gas filter 16 filled with a chemical agent for removing other gases than the gas detected by all the gas detectors;
a second gas filter 18 filled with a chemical agent for removing other gases than the gases measured by the second, third and fourth gas detectors;
a third gas filter 20 filled with a chemical agent for removing other gases than the gases measured by the third and fourth gas detectors;
and a fourth gas filter 22 filled with a chemical agent for removing other gases than the gas measured by the fourth gas detector.
In this embodiment, the water-gas separator 2 has a filter element therein, so as to remove liquid drops in the sample gas and reduce the humidity of a part of the sample gas; the dust removing coarse filter 6 and the dust removing fine filter 7 are internally provided with filter cores, wherein the inside of the dust removing coarse filter 6 is provided with a 40um filter core, and the inside of the dust removing fine filter 7 is provided with a 5um filter core, so that the dust removing coarse filter 6 and the dust removing fine filter 7 are used for removing particulate matters in sample gas, and the filter core is convenient to replace; the dry filter 8 is filled with chemical reagent for further reducing the humidity of the sample gas, and the reagent is convenient to replace; the vacuum electric diaphragm pump 9, in particular to an electric vacuum diaphragm pump, can extract negative pressure gas to be tested by using direct current voltage, can continuously work without power off and has long service life. The gas detector is provided with a display screen for displaying the gas concentration value and has 4-20mA analog quantity signal output or RS485 signal output. The three-way ball valve 14, two in and one out, is manually operated, and is used for selecting whether the gas discharged from the gas outlet at the upper end is left-end gas or right-end gas, and is used when the gas detector is calibrated or calibrated. The flow meter 15 is used to fine tune and indicate the flow of gas into the gas detector so that an optimal detection of the gas detector can be achieved.
When the device of the embodiment works, the gas to be detected at the site sampling point is connected to the joint 1 through the sampling gas pipe, and the gas to be detected is pumped into the detection cabinet through the gas pipeline under the action of the vacuum electric diaphragm pump 9. The sample gas to be measured firstly passes through the water-gas separator 2, liquid drops in the sample gas can enter the water storage tank 3, and when the water in the water storage tank is excessive, the drain valve 4 can be opened to drain water; then the sample gas passes through a dust removing coarse filter 6 and a dust removing fine filter 7 to remove particles in the sample gas, so that the particles are prevented from damaging a vacuum electric diaphragm pump 9, and then enter a drying filter 8 to further reduce the humidity of the sample gas; then enters a vacuum electric diaphragm pump 9; the dried sample gas enters a gas detection unit to detect the concentration of target gas; the flow meter 15 is used to indicate the flow value into the gas detector in order to reach the optimal detection flow of the gas detector;
the first gas detector 17, the second gas detector 19, the third gas detector 21 and the fourth gas detector 23 respectively detect different component gases of the dried sample gas; the first gas filter 16, the second gas filter 18, the third gas filter 20, and the fourth gas filter 22 are filled with different chemical reagents, respectively, for removing different gases so that each gas detector can more precisely detect the target gas without being affected by other interfering gases outside the target gas.
Example 2
This embodiment differs from embodiment 1 in that: the gas bypass unit is also included;
the gas bypass unit comprises a bypass restrictor valve 11 and a bypass adjustable flow meter 12 arranged in a gas bypass line; the gas bypass pipeline is communicated with the output end of the power unit and the input end of the gas detection unit through a three-way joint 10.
Specifically, the left end of the three-way joint 10 is connected to the other end of the vacuum electric diaphragm pump 9, the right end of the three-way joint 10 is connected to the left end of the three-way ball valve 14, the lower end of the three-way joint 10 is connected to one end of the bypass flow limiting valve 11, the other end of the bypass flow limiting valve 11 is connected to one end of the bypass adjustable flowmeter 12, the other end of the bypass adjustable flowmeter 12 is connected to one end of the bypass air outlet through plate joint 13, and the other end of the bypass air outlet through plate joint 13 is reserved to be empty.
When the device of the embodiment works, the sample gas dried by the drying filter 8 enters the three-way joint 10 for diversion, and part of the sample gas enters the bypass unit; the bypass adjustable flowmeter 12 is used for indicating the value of the flow of the sample gas to be detected flowing through the bypass, and the bypass restrictor valve 11 is used for adjusting the flow of the bypass gas, so that the flow of the gas entering the gas detection unit is indirectly adjusted.
In actual operation, because the air outlet flow of the vacuum electric diaphragm pump 9 is far greater than the flow required by detection of the gas detector in the gas detection unit, a gas bypass unit is required to be arranged at the air outlet of the vacuum electric diaphragm pump 9 so as to regulate the flow of the gas entering the gas detection unit, and the gas with the redundant flow is discharged, thereby meeting the measurement requirement.
Example 3
This embodiment differs from embodiment 2 in that:
the target detection gas of the first gas detector 17 is hydrogen sulfide, the target detection gas of the second gas detector 19 is ammonia, the target detection gas of the third gas detector 21 is methane, and the target detection gas of the fourth gas detector 23 is oxygen;
the interfering gas filtered by the first gas filter 16 is water vapor and VOC exhaust gas, and the interfering gas filtered by the second gas filter 18 is hydrogen sulfide; since the remaining gases do not interfere with each other, the third gas filter 20 and the fourth gas filter 22 may be used for filtering the gases without filling the chemical agent in consideration of cost.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (6)
1. An online multi-gas detection device, which is characterized in that: comprises a power unit, a gas pretreatment unit and a gas detection unit;
the gas pretreatment unit comprises a water-gas separator, a dust removal coarse filter, a dust removal fine filter and a drying filter which are sequentially communicated through pipelines;
the input end of the power unit is communicated with the output end of the gas pretreatment unit through a pipeline, the output end of the power unit is communicated with the input end of the gas detection unit through a pipeline, and the power unit is used for conveying the sample gas to be detected into the gas pretreatment mechanism for pretreatment and conveying the pretreated sample gas to be detected into the gas detection unit for detection;
the gas detection unit comprises N gas filters and N gas detectors, wherein N is more than or equal to 2;
the N gas filters and the N gas detectors are sequentially communicated through pipelines according to the sequence of the first gas filter, the first gas detector, the second gas filter, the second gas detector, … …, the N gas filter and the N gas detector;
the target gases detected by the gas detectors are different;
the interference degree of each gas detector by other target gases is increased sequentially according to the sequence of the first gas detector, the second gas detector, the … … and the Nth gas detector;
the first gas filter is used for removing other gases except the gases detected by the gas detectors;
the second gas filter is used for removing the second gas detector and other gases except the gases detected by the second gas detector;
the N-th gas filter is used for removing other gases except the gas detected by the N-th gas detector;
the gas bypass unit is also included;
the gas bypass unit comprises a bypass restrictor valve and a bypass adjustable flowmeter arranged in a gas bypass pipeline;
the gas bypass pipeline is communicated with the output end of the power unit and the input end of the gas detection unit through a three-way joint.
2. The on-line multi-gas detection apparatus according to claim 1, wherein: the water storage tank is connected with the water outlet of the water-gas separator through a pipeline, and the water outlet of the water storage tank is connected to one end of the water outlet valve through a pipeline.
3. The on-line multi-gas detection apparatus according to claim 1, wherein: the bypass flow limiting valve and the bypass adjustable flowmeter are manually adjusted.
4. The on-line multi-gas detection apparatus according to claim 1, wherein: the device also comprises a gas marking gas path;
the gas marking gas circuit is communicated with the output end of the power unit and the input end of the gas detection unit through the three-way ball valve and is used for introducing gas marking when the gas detector is subjected to verification and calibration operation.
5. The on-line multi-gas detection apparatus according to claim 1, wherein: the power unit is a vacuum electric diaphragm pump.
6. The on-line multi-gas detection apparatus according to claim 1, wherein: the input end of the gas detection unit is provided with a flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223172341.6U CN219608868U (en) | 2022-11-29 | 2022-11-29 | Online multi-gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223172341.6U CN219608868U (en) | 2022-11-29 | 2022-11-29 | Online multi-gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219608868U true CN219608868U (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223172341.6U Active CN219608868U (en) | 2022-11-29 | 2022-11-29 | Online multi-gas detection device |
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| CN (1) | CN219608868U (en) |
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- 2022-11-29 CN CN202223172341.6U patent/CN219608868U/en active Active
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