CN112415144A - Multi-point multi-element gas on-line detection device - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 126
- 239000007789 gas Substances 0.000 claims abstract description 156
- 239000000523 sample Substances 0.000 claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 6
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- 230000001105 regulatory effect Effects 0.000 claims description 4
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- 238000000034 method Methods 0.000 description 7
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- 238000004891 communication Methods 0.000 description 5
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007781 pre-processing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
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- 238000007689 inspection Methods 0.000 description 2
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- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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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
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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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
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
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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
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
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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
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0044—Sulphides, e.g. H2S
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Abstract
The invention relates to a multipoint multielement gas on-line detection device, which comprises: the device comprises a sampling unit, a vacuum pump, a pretreatment unit, a gas detection unit and a sample gas return pipeline; the sampling unit comprises at least two detection probes, two sampling pipelines, a sample gas selection valve and a confluence pipeline, wherein the inlet of each sampling pipeline is connected with the detection probes, the outlets of the sampling pipelines are correspondingly connected with the inlets of the sample gas selection valves one by one, and the outlet of the sample gas selection valve is connected with the input end of the vacuum pump through the confluence pipeline; the output end of the vacuum pump is connected with the input end of the gas detection unit through the pretreatment unit; the output end of the gas detection unit is connected with the sample gas return pipeline, and the gas detection unit at least comprises an oxygen detector and a combustible gas detector. The invention realizes the active on-line detection of a plurality of dangerous points and a plurality of dangerous gases, ensures the personal safety of detection personnel and greatly improves the active protection capability of the safety risk of an operation site.
Description
Technical Field
The invention belongs to the technical field of gas detection, and particularly relates to a multipoint multi-gas online detection device.
Background
In recent years, fire accidents in the industries of petroleum and petrochemical industry and the like frequently occur at home and abroad, which not only causes serious casualties and property loss, but also causes environmental pollution. According to incomplete statistics of related organizations, in recent decades, the global petroleum and petrochemical industry has 700 fires, most of which are caused by objective reasons, so that the occurrence of the fires is extremely difficult to prevent. Such as: leakage of an oil pipeline or a gas pipeline, a valve, a sealing mechanism and the like, overflow or gathering of combustible gas of an oil storage tank, and formation of combustible mixed gas in operation of an oil tank truck or a gas tank truck can be caused, and when open fire or fire light occurs, combustion and explosion are easy to occur, so that fire is caused. For this safety risk, common detection precautions are:
a fixed gas detector is arranged at a position where combustible gas, toxic gas or pipelines are easy to leak for a long time, and the combustible or toxic gas can be detected when the combustible or toxic gas drifts around the fixed gas detector and enters a measuring cabin. The detector can detect single gas such as methane, hydrogen sulfide and the like. However, the space range detectable by the detector is limited (less than 5m around), and the fixed gas detector is not satisfactory for places with complex process areas such as process pipelines and valves, oil pipelines in oil storage tank areas, places with operation of explosion danger areas and other places with more potential danger sources.
The inspection personnel carry the portable gas detector to different inspection points for manual detection. However, the manual detection method can only manually perform single-point detection on the spot, which not only has great labor intensity for operators, but also directly affects the accuracy and credibility of gas detection by the operation level and method, and is easy to cause the risk of fire or personnel poisoning in the operation process.
Disclosure of Invention
In order to solve the problems of limited detection range, high accuracy and low credibility of artificial detection danger in the prior art, the invention provides a multipoint multielement gas online detection device and system, which have the characteristics of safety, convenience, higher accuracy and credibility, reduction of maintenance cost and use cost and the like.
According to the embodiment of the invention, the multipoint multi-gas online detection device comprises: the device comprises a sampling unit, a vacuum pump, a pretreatment unit, a gas detection unit and a sample gas return pipeline;
the sampling unit comprises at least two detection probes, two sampling pipelines, a sample gas selection valve and a confluence pipeline, wherein the inlet of each sampling pipeline is connected with the detection probe, the outlets of the sampling pipelines are correspondingly connected with the inlets of the sample gas selection valves one by one, and the outlet of the sample gas selection valve is connected with the input end of the vacuum pump through the confluence pipeline;
the output end of the vacuum pump is connected with the input end of the gas detection unit through the pretreatment unit;
the output end of the gas detection unit is connected with the sample gas return pipeline, and the gas detection unit at least comprises an oxygen detector and a combustible gas detector.
Further, the sample gas selection valve is an electromagnetic valve or an electrically controlled pneumatic valve electrically connected with the controller.
Further, the vacuum pump is used for conveying the extracted gas at the detection probe to the gas detection unit, and the gas detection unit outputs corresponding alarm information and corresponding detection information.
Further, the preprocessing unit includes: a dust filter element, a drying element, and a flow regulating element.
Further, the detection probe comprises a filter element and a fastening element, wherein the filter element is connected with the sampling pipeline and used for collecting gas; the fastening element is used for mounting the filter element.
Further, the sample gas return pipeline is used for injecting the detected gas back to the detection area.
Further, the multipoint multi-component gas online detection device further comprises a controller, wherein the controller is respectively electrically connected with the sample gas selection valve, the vacuum pump and the gas detection unit and is used for remote monitoring and data transmission.
Further, the multipoint multi-component gas online detection device further comprises a remote monitoring terminal connected with the controller, and the controller and the remote monitoring unit are communicated in a wired or wireless mode.
The invention has the beneficial effects that: the multi-point multi-gas online detection device has the characteristics of multi-point distribution detection and multi-component gas detection, and is movable and portable, when the operation is required for an explosion danger area or a non-explosion area, a plurality of detection probes can be arranged around the operation, the gas around the operation is actively extracted by the vacuum pump and is sent to the gas detection unit for detection, active online analysis is realized, the detection range is wider, the position where operators are inconvenient to go can be safely detected, the operation safety is ensured, the cost is saved, the detection period can be reasonably arranged, and the detection position can be detected. Therefore, active online detection of multiple dangerous points and multiple dangerous gases is realized, the personal safety of detection personnel is guaranteed, and the active protection capability of the safety risk of the operation site is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a multipoint multivariate gas on-line detection device provided in accordance with an exemplary embodiment;
FIG. 2 is a connection diagram of a multipoint multi-component gas online detection device provided in accordance with an exemplary embodiment;
FIG. 3 is another connection diagram of a multipoint multi-component gas online detection device provided in accordance with an exemplary embodiment;
fig. 4 is still another schematic diagram of a multipoint multi-gas online detection device provided according to an exemplary embodiment.
Reference numerals
1-detecting the probe; 2-a sampling pipe; 3-sample gas selector valve; 4-a converging line; 5-a vacuum pump; 6-a pretreatment unit; 7-a gas detection unit; 8-sample gas return line; 9-a controller; 10-remote monitoring terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a multipoint multi-gas online detection apparatus, including: the device comprises a sampling unit, a vacuum pump 5, a pretreatment unit 6, a gas detection unit 7 and a sample gas return pipeline 8;
the sampling unit comprises at least two detection probes 1, two sampling pipelines 2, a sample gas selection valve 3 and a confluence pipeline 4, wherein the inlet of the sampling pipeline 2 is connected with the detection probes 1, the outlets of the sampling pipelines 2 are correspondingly connected with the inlets of the sample gas selection valve 3 one by one, and the outlet of the sample gas selection valve 3 is connected with the input end of a vacuum pump 5 through the confluence pipeline 4;
the output end of the vacuum pump 5 is connected with the input end of a gas detection unit 7 through a preprocessing unit 6, and is used for conveying the extracted gas at the detection probe 1 to the gas detection unit 7, and the gas detection unit 7 outputs corresponding alarm information and corresponding detection information;
the output end of the gas detection unit 7 is connected with a sample gas return pipeline 8 and is used for injecting the detected gas back to the detection area;
specifically, the user may use the device according to actual conditions on site, such as: petrochemical plant areas, petrochemical product storage tanks and tanks areas, chemical plant areas, process pipelines, valves, warehouses and the like; the number of selected test probes in explosion-proof area or non-explosion-proof area, chemical industry operation restricted area etc. test probe 1, conflux pipeline 4, sampling pipeline 2 can fixed mounting also can lay temporarily, satisfy the demand of different operations, and test probe 1 can be for having open-ended suction nozzle, its suction gas's distance is adjustable, suck the gas around the check point through the mode of suction after vacuum pump 5 opens and carry gas detecting element 7 to detect and output alarm information after safe predetermined, and can show relevant data on the display screen. The controller 9 can select the sample gas by controlling the switch of the sample gas selection valve 3, the detected gas variety is various, and the gas analyzer can be replaced at any time according to the detected gas, such as oxygen, nitrogen, methane, carbon monoxide, hydrogen sulfide, gasoline, other carbon oxides, organic volatile gas and the like. The running state of the multipoint multielement gas on-line detection device is monitored in real time through a display screen on site, or detected data and the running state of the multipoint multielement gas on-line detection device are transmitted in real time through a wireless network.
Compared with the prior art, the method can simultaneously meet the use requirements of different working conditions and different limited environments; when the gas concentration monitoring device works in a dangerous area, the mobile multi-point multi-gas online detection device can be moved to a proper position, and gas concentration monitoring is carried out on a working environment. The position of the detection point can be adjusted at any time, the detection probe 1 and the corresponding pipeline can be fixedly installed or temporarily laid, and the use requirements of different operations are met; the distance of the sucked gas is adjustable; the gas analyzer can be replaced at any time according to different sucked gases; the remote transmission of data is realized through a wireless network, and the operation state of the mobile multipoint multielement gas online detection device is convenient to remotely monitor. Only one set of mobile multipoint multielement gas online detection device is needed to be configured for one or more dangerous areas, so that the cost is saved, and the detection period and the detection position can be reasonably arranged.
Referring to fig. 2, in another embodiment of the present invention, the controller 9 is electrically connected to the sample gas selector valve 3, the vacuum pump 5 and the gas detection unit 7 respectively for remote monitoring and data transmission.
The detection probe 1 comprises a filter element and a fastening element, wherein the filter element is connected with the sampling pipeline 2 and is used for collecting and primarily filtering gas; the fastening element is used for mounting the filter element.
The sample gas selection valve is an electromagnetic valve 2 or an electric control pneumatic valve 3 electrically connected with a controller 9, and the electromagnetic valve 2 is connected with the controller 9 and used for access control of each detection probe 1. The pre-processing unit connected between the vacuum pump 3 and the gas detection unit 5 comprises at least: a dust filter element and a drying element for filtering and drying the inhaled gas. And the flow regulating element is used for regulating the flow.
Specifically, when the device is used specifically, the position of the multi-point multi-gas online detection device is adjusted and locked according to the implemented field situation, the detection probes 1 are arranged at different positions, the vacuum pump 5 and the electromagnetic valve group are started to pump the mixed gas of a single detection probe 1, the pumped gas is purified through drying, deslagging and the like by the pretreatment unit, and then enters the gas detection unit group to detect the gas concentration; the gas analyzer unit transmits the detected data to the controller, and the controller 9 compares the uploaded data and outputs alarm information; the detected gas is discharged into the atmosphere through the sample gas return pipeline on site, thereby realizing complete gas detection at one time. And repeating the steps, and automatically switching the electromagnetic valve to circularly detect the mixed gas at each detection point so as to realize the detection of the gas concentration. And in the specific implementation, the controller is connected with at least two gas detection units and the controller and is used for remote transmission and monitoring of analysis data.
That is, the controller 9 can transmit the data detected by 1 or more sets of multi-point multi-gas online detection devices and the operation state thereof to the remote monitoring terminal 10 through the wireless network, so as to realize remote monitoring.
Referring to fig. 3, in some embodiments of the present invention, a solenoid valve is provided in the confluence line for on-off control of the gas connection paths of the confluence line 4 and the vacuum pump 3.
Specifically, the position of the multi-point multi-gas online detection device is adjusted and locked, the vacuum pump 5 and the electromagnetic valve are started, gas at all detection points is sucked at the same time, all the sucked gas is mixed in the collecting and distributing pipe, and then enters the gas detection unit 7 through the pretreatment unit 6 to detect the gas concentration; the gas detection unit 7 transmits the detected data to the controller, and the controller 9 compares the uploaded data and outputs alarm information; the detected gas is discharged into the atmosphere through the sample gas return pipeline on site, thereby realizing complete gas detection at one time. The two gas detection modes shown in fig. 2 and fig. 3 can be selected by those skilled in the art according to the actual application requirements, and the present invention is not limited herein.
In other embodiments of the present invention, gas detection unit 7 includes at least an oxygen detector and a combustible gas detector. Those skilled in the art can select different detectors to analyze the gas according to the requirement, and the present invention is not described herein again.
Referring to fig. 4, the remote monitoring terminal 10 and the controller 9 communicate on a wired or wireless basis for receiving corresponding alarm information and corresponding detection information.
Through adding remote monitoring terminal 10, controller 9 can transmit each data and its running state that 1 set or more sets of many gaseous on-line measuring device of multiple spot detect to remote monitoring terminal 10 through wireless network on, realize remote monitoring, provide convenience for gaseous remote analysis.
The wireless communication mode is one or more of bluetooth communication, wifi communication, Zigbee communication, 4G and 5G, and the wired communication mode may also be an existing common transmission mode, which is not limited herein.
The multipoint multielement gas online detection device and the multipoint multielement gas online detection system provided by the embodiment of the invention have the advantages that the function of remote automatic detection can be realized, and the position where operators do not go conveniently can be safely detected; single-point detection and multi-point detection can be realized, so that the detection range is wider and more complete; when the device works in an explosion dangerous area or a non-explosion area, a plurality of detection points are arranged around the operation, so that the operation safety is ensured; only one set of mobile multipoint multielement gas online detection device is needed to be configured for one or more dangerous areas, so that the cost is saved, and the detection period and the detection position can be reasonably arranged. The active online detection of a plurality of dangerous points and a plurality of dangerous gases is realized, the personal safety of detection personnel is ensured, and the active protection capability of the safety risk of an operation site is greatly improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The utility model provides a gaseous on-line measuring device of multiple spot polybasic which characterized in that includes: the device comprises a sampling unit, a vacuum pump, a pretreatment unit, a gas detection unit and a sample gas return pipeline;
the sampling unit comprises at least two detection probes, two sampling pipelines, a sample gas selection valve and a confluence pipeline, wherein the inlet of each sampling pipeline is connected with the detection probe, the outlets of the sampling pipelines are correspondingly connected with the inlets of the sample gas selection valves one by one, and the outlet of the sample gas selection valve is connected with the input end of the vacuum pump through the confluence pipeline;
the output end of the vacuum pump is connected with the input end of the gas detection unit through the pretreatment unit;
the output end of the gas detection unit is connected with the sample gas return pipeline, and the gas detection unit at least comprises an oxygen detector and a combustible gas detector.
2. The multi-point multi-gas online detection device according to claim 1, wherein the sample gas selection valve is an electromagnetic valve or an electrically controlled pneumatic valve electrically connected to the controller.
3. The multipoint multi-gas online detection device according to claim 2, wherein the vacuum pump is used for conveying the extracted gas at the detection probe to the gas detection unit, and the gas detection unit outputs corresponding alarm information and corresponding detection information.
4. The multipoint multi-gas online detection device according to claim 1, wherein the pretreatment unit comprises: a dust filter element, a drying element, and a flow regulating element.
5. The multipoint multielement gas on-line detection device according to claim 1, wherein the detection probe comprises a filter element and a fastening element, and the filter element is connected with the sampling pipeline and used for collecting gas; the fastening element is used for mounting the filter element.
6. The multi-point multi-gas online detection device according to claim 1, wherein the sample gas return pipeline is used for injecting the detected gas back to the detection area.
7. The multi-point multi-gas online detection device according to any one of claims 1 to 6, further comprising a controller, wherein the controller is electrically connected with the sample gas selection valve, the vacuum pump and the gas detection unit respectively, and is used for remote monitoring and data transmission.
8. The multi-point multi-gas online detection device according to claim 7, further comprising a remote monitoring terminal connected to the controller, wherein the controller and the remote monitoring unit communicate with each other in a wired or wireless manner.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074994A (en) * | 2021-03-17 | 2021-07-06 | 南通大学 | Portable tail gas sampling device and using method thereof |
| CN115235839A (en) * | 2022-09-22 | 2022-10-25 | 国网湖北省电力有限公司中超建设管理公司 | Portable gas monitor |
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