CN112284628A - VOCs reveals on-line measuring system - Google Patents
VOCs reveals on-line measuring system Download PDFInfo
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- CN112284628A CN112284628A CN202011353349.5A CN202011353349A CN112284628A CN 112284628 A CN112284628 A CN 112284628A CN 202011353349 A CN202011353349 A CN 202011353349A CN 112284628 A CN112284628 A CN 112284628A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 52
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007405 data analysis Methods 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 2
- 239000000383 hazardous chemical Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an online detection system for VOCs leakage, which is used for online detection of VOCs leakage of a to-be-detected area, wherein the to-be-detected area consists of a plurality of to-be-detected points; the online detection system comprises: at least one image processing device, a data acquisition device, a data sampling device and a control device; the image processing apparatus includes: the system comprises an image acquisition module and an image processing module; the image acquisition module is used for acquiring image information of the area to be detected in real time; the image processing module is used for processing the image information and determining a point to be detected where VOCs leakage occurs according to the image information; and each point to be detected is provided with at least one data acquisition device and at least one data sampling device. The online detection system can efficiently, timely and accurately detect the leakage of the VOCs.
Description
Technical Field
The invention belongs to the technical field of hazardous article leakage detection, and particularly relates to an online detection system for VOCs leakage.
Background
Various pipelines and equipment in the production process of hazardous chemicals use a large number of connecting modes such as valves, flanges and threads, so that a large number of dynamic and static sealing points exist. Once these parts are leaked, besides great energy loss, the safety accidents such as fire, explosion, poisoning and the like are very easy to cause.
According to the statistical analysis of related leakage detection, the leakage point distribution of the petrochemical production site is mainly based on various valves, and the trace leakage of the valves accounts for 54 percent of the total number of the valves; the average leakage of the pump exceeds that of a valve and a threaded connector, but the leakage equipment is less, and accounts for 13% of trace leakage.
In order to ensure the production safety, the safety monitoring of the whole production process of hazardous chemicals is required. The most important link is to monitor and detect whether each connection point is leaked.
The most common detection method at present adopts electrochemical gas detection (such as various combustible gas alarms and toxic gas analyzers). However, in this way, blind areas or missed judgment are easily caused by objective reasons such as wind direction, point arrangement and the like; and even if gas leakage can be detected, the location of the leak point, the diffusion tendency, etc. cannot be determined. Therefore, the demand of VOCs leakage on-line detection cannot be met.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an online detection system for VOCs leakage.
According to one aspect of the invention, an online detection system for detecting leakage of VOCs is provided, which is used for online detection of leakage of VOCs in a region to be detected, wherein the region to be detected is composed of a plurality of points to be detected;
the online detection system comprises: at least one image processing device, a data acquisition device, a data sampling device and a control device;
the image processing apparatus includes: the system comprises an image acquisition module and an image processing module;
the image acquisition module is used for acquiring image information of the area to be detected in real time;
the image processing module is used for processing the image information and determining a point to be detected where VOCs leakage occurs according to the image information;
each point to be detected is provided with at least one data acquisition device and at least one data sampling device;
the data acquisition device is used for acquiring the VOCs components and concentration data of the point to be detected;
the data sampling device is used for sampling and analyzing the VOCs of the point to be detected;
the control device is used for controlling the opening and closing of the image processing device, the data acquisition device and/or the data sampling device; and receiving data information transmitted by the image processing device, the data acquisition device and/or the data sampling device.
According to a specific embodiment of the present invention, the image acquisition module is an infrared camera; the image processing module comprises a range finder.
According to another embodiment of the present invention, the data acquisition apparatus comprises: gas analyzer, flow analyzer, meteorological parameter analyzer.
According to yet another embodiment of the present invention, the control device includes: the data analysis module is used for analyzing the data;
the data storage module is used for storing the data information transmitted by the image processing device, the data acquisition device and/or the data sampling device;
the data analysis module is used for comprehensively analyzing the data information;
the data transmission module is used for carrying out data transmission with other systems, devices, modules and/or equipment.
According to a further embodiment of the invention, the data sampling device comprises, connected in series: air inlet valve, gas bomb, air outlet valve, flowmeter and filter.
According to yet another embodiment of the present invention, the data sampling apparatus further comprises: an ice bath;
the ice bath groove is arranged between the gas outlet valve and the flowmeter and used for cooling the gas flowing out of the gas outlet valve.
According to yet another embodiment of the invention, the gas cylinder is under vacuum before the data sampling operation begins.
According to a further embodiment of the invention, the inlet valve and/or the outlet valve are provided with a pressure gauge.
The VOCs online detection system provided by the invention is reasonable in layout and clear in structure. The positions of the VOCs leakage points can be accurately determined through an image processing device; the data acquisition device can analyze parameters such as concentration, components and flow of VOCs in the leakage area in detail; the data sampling device can further analyze the exhaust gas. The control device can control the opening and closing of the three devices, and can work simultaneously and work as required. The design can start the required devices according to the needs, and can save energy and protect environment while obtaining the optimal result.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram illustrating an embodiment of an online detection system for detecting leakage of VOCs according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of an image processing apparatus;
FIG. 3 is a schematic structural diagram of an embodiment of a control device;
fig. 4 is a schematic structural diagram of an embodiment of a data sampling apparatus.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
Referring to fig. 1, the invention provides an online detection system for leakage of VOCs. The online detection system is used for online detection of VOCs leakage of a region to be detected, and the region to be detected is composed of a plurality of points to be detected.
The online detection system comprises: at least one image processing device 20, a data acquisition device 30, a data sampling device 40 and a control device 10. The control device 10 is configured to control on and off of the image processing device 20, the data acquisition device 30, and/or the data sampling device 40; and receives data information transmitted by the image processing device 20, the data acquisition device 30 and/or the data sampling device 40. After receiving the data transmitted by the three devices, the control device 10 may perform comprehensive analysis on the data, and send the analysis result to the cloud storage and/or the comprehensive control center.
As shown in fig. 2, the image processing apparatus 20 includes: an image acquisition module 21 and an image processing module 22. The image acquisition module 21 is configured to acquire image information of the to-be-detected region in real time. Because each substance has its own infrared characteristic absorption spectrum, the infrared image acquired by the image acquisition module 21 can be combined with the characteristic absorption spectrum of the VOCs to know whether the VOCs leakage occurs in the area to be detected. Preferably, the image acquisition module 21 is an infrared camera.
The image processing module 22 is configured to process the image information, and determine a point to be detected where the VOCs leak occurs according to the image information. Specifically, the image processing module 22 can obtain the position information of the leak, i.e. at which point or points to be detected the leak is located, by processing the infrared image acquired by the image acquisition module 21. Preferably, the image processing module 22 comprises an infrared range finder.
As can be seen from the above description, the leakage of VOCs can be monitored in real time and the specific locations thereof can be located by providing an image processing apparatus 20 throughout the region to be detected. Of course, in order to increase the detection accuracy, the number of image processing apparatuses 20 of the region to be detected may be increased as appropriate.
At least one data acquisition device 30 and at least one data sampling device 40 are arranged at each point to be detected.
In order to further analyze the leakage condition of the VOCs in detail, after the point to be detected where the leakage point is located is obtained, the data acquisition device 30 of the point to be detected may be started. The data acquisition device 30 is configured to acquire the VOCs components and concentration data of the point to be detected. Preferably, the data acquisition device 30 includes: gas analyzer, flow analyzer and meteorological parameter analyzer.
Since meteorological conditions such as wind speed, wind direction, and temperature have a large influence on the concentration, flow rate, and the like of pollutants, the meteorological parameter analyzer plays a very important role in the data acquisition device 30. The data acquisition device 30 acquires the information of the VOCs components, concentration change rate, meteorological parameters and the like of the point to be detected, and performs comprehensive analysis to obtain detailed VOCs information. Furthermore, the data acquisition device 30 can trace the specific position of the leakage point in the point to be detected through the three-dimensional dynamic model, so as to realize more accurate leakage point positioning.
For further detailed analysis of the leaked VOCs, the data sampling device 40 may be activated, see fig. 4. And the data sampling device 40 is configured to perform sampling analysis on the VOCs at the point to be detected.
As the name implies, the data sampling apparatus 40 needs to perform sampling analysis on the leaked VOCs. Therefore, preferably, the data sampling device 40 includes, connected in sequence: an air inlet valve 41, a gas cylinder 42, an air outlet valve 43, a flow meter 44 and a filter 45.
In order to ensure the accuracy of the sampled data, it is preferable that the gas cylinder 42 is under vacuum before the data sampling operation is started.
When the data sampling device 40 performs a data sampling operation, first, the leaked VOCs are sucked into the gas bomb 42 through the intake valve 41. When the gas in the gas cylinder 42 reaches a proper amount, the gas outlet valve 43 is opened to allow the gas to pass through the flow meter 44. The flow meter 44 measures the flow rate of the VOCs, and analyzes the detailed information such as the concentration and composition of the VOCs. And filtering the analyzed VOCs by a filter and then discharging the VOCs. A data sampling device 40. Thus, the sampling analysis process is completed.
Preferably, a pressure gauge is provided at the inlet valve 41 and/or the outlet valve 43. The setting of the pressure gauge can more accurately acquire information such as the flow rate of the VOCs.
In addition, leakage of VOCs often occurs in production plants and the like, and the temperature of the leaked VOCs is high. Since the variation in temperature has a relatively large influence on the detection result, a temperature reduction device is further included in the data sampling apparatus 40. Preferably, the data sampling apparatus 40 further includes: and an ice bath (not shown in the figure) disposed between the gas outlet valve 43 and the flow meter 44 for cooling the gas flowing out of the gas outlet valve 43. After the gas flowing out of the gas outlet valve 43 passes through the ice bath, the water vapor in the VOCs is liquefied into liquid and is left in the ice bath, and the VOCs which do not contain water vapor and have proper temperature enter the flow meter 44, so that the sampling accuracy is improved.
The image processing device 20, the data acquisition device 30 and the data sampling device 30 can analyze the leakage of the VOCs with different emphasis points according to respective characteristics. The three devices are controlled by the control device 10.
The control device 10 may control the opening and closing of the image processing device 20, the data acquisition device 30, and/or the data sampling device 40. Normally, the image processing apparatus 20 is in continuous operation. After the image processing device 20 finds that the VOCs leaks and determines a point to be detected where the leakage point is located; the control device 10 controls the data acquisition device 30 at the point to be detected to start, and at this time, if detailed sampling data is required, the data sampling device 40 can be started at the same time.
Further, the control device 10 includes: a data storage module 11, a data analysis module 12 and a data transmission module 13, as shown in fig. 3.
The data storage module 11 is configured to store data information transmitted by the image processing apparatus 20, the data acquisition apparatus 30, and/or the data sampling apparatus 40. The data storage module can be a local database, a cloud database or a combination of the local database and the cloud database. And the data analysis module 12 is configured to perform comprehensive analysis on the data information to obtain comprehensive and detailed leakage information of the VOCs. The data transmission module 13 is configured to perform data transmission with other systems, apparatuses, modules and/or devices.
The VOCs online detection system provided by the invention has the advantages of simple structure and clear architecture, and can detect the leakage of VOCs in all directions and at multiple angles; simultaneously, the collaborative work of a plurality of devices has still practiced thrift energy and cost when realizing high-efficient, accurate detection VOCs reveals.
Although the present invention has been described in detail with respect to the exemplary embodiments and advantages thereof, it should be understood that various changes, substitutions, and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. For other examples, one of ordinary skill in the art will readily appreciate that the order of the process steps may be varied while maintaining the scope of the present invention.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (8)
1. The VOCs leakage online detection system is used for online detection of VOCs leakage of a to-be-detected area, wherein the to-be-detected area consists of a plurality of to-be-detected points; it is characterized in that the preparation method is characterized in that,
the online detection system comprises: at least one image processing device, a data acquisition device, a data sampling device and a control device;
the image processing apparatus includes: the system comprises an image acquisition module and an image processing module;
the image acquisition module is used for acquiring image information of the area to be detected in real time;
the image processing module is used for processing the image information and determining a point to be detected where VOCs leakage occurs according to the image information;
each point to be detected is provided with at least one data acquisition device and at least one data sampling device;
the data acquisition device is used for acquiring the VOCs components and concentration data of the point to be detected;
the data sampling device is used for sampling and analyzing the VOCs of the point to be detected;
the control device is used for controlling the opening and closing of the image processing device, the data acquisition device and/or the data sampling device; and receiving data information transmitted by the image processing device, the data acquisition device and/or the data sampling device.
2. The on-line detection system of claim 1, wherein the image acquisition module is an infrared camera; the image processing module comprises a range finder.
3. The on-line detection system of claim 1, wherein the data acquisition device comprises: gas analyzer, flow analyzer, meteorological parameter analyzer.
4. The on-line detection system of claim 1, wherein the control device comprises: the data analysis module is used for analyzing the data;
the data storage module is used for storing the data information transmitted by the image processing device, the data acquisition device and/or the data sampling device;
the data analysis module is used for comprehensively analyzing the data information;
the data transmission module is used for carrying out data transmission with other systems, devices, modules and/or equipment.
5. The on-line detection system of claim 1, wherein the data sampling device comprises, connected in sequence: air inlet valve, gas bomb, air outlet valve, flowmeter and filter.
6. The on-line detection system of claim 5, wherein the data sampling device further comprises: an ice bath;
the ice bath groove is arranged between the gas outlet valve and the flowmeter and used for cooling the gas flowing out of the gas outlet valve.
7. The on-line detection system of claim 5, wherein the cylinder is under vacuum before the data sampling operation begins.
8. The on-line detection system according to claim 5, wherein the inlet valve and/or the outlet valve is provided with a pressure gauge.
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| CN202011353349.5A CN112284628A (en) | 2020-11-27 | 2020-11-27 | VOCs reveals on-line measuring system |
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Citations (6)
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|---|---|---|---|---|
| KR101131095B1 (en) * | 2011-06-10 | 2012-04-02 | 주식회사 창성에이스산업 | Gas Leak Detection System and Method |
| CN109686059A (en) * | 2018-12-29 | 2019-04-26 | 北京维禹特科技发展有限公司 | A kind of VOCs leakage monitoring traceability system and method |
| CN110260169A (en) * | 2019-06-14 | 2019-09-20 | 山东盛隆安全技术有限公司 | A kind of fuel gas pipeline leakage Tube Bundle Monitoring System |
| CN110736808A (en) * | 2018-07-19 | 2020-01-31 | 上海云谱环保科技有限公司 | VOCs on-line monitoring method, monitoring system memory and monitoring device |
| CN111272957A (en) * | 2020-04-27 | 2020-06-12 | 河南弘康环保科技有限公司 | VOCs sampling device for dynamic and static sealing points of equipment and leakage amount measuring method |
| CN111596002A (en) * | 2020-03-29 | 2020-08-28 | 江苏威尔安智能科技有限公司 | LEL and V0C intelligent online analysis and treatment system for detecting waste gas |
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2020
- 2020-11-27 CN CN202011353349.5A patent/CN112284628A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101131095B1 (en) * | 2011-06-10 | 2012-04-02 | 주식회사 창성에이스산업 | Gas Leak Detection System and Method |
| CN110736808A (en) * | 2018-07-19 | 2020-01-31 | 上海云谱环保科技有限公司 | VOCs on-line monitoring method, monitoring system memory and monitoring device |
| CN109686059A (en) * | 2018-12-29 | 2019-04-26 | 北京维禹特科技发展有限公司 | A kind of VOCs leakage monitoring traceability system and method |
| CN110260169A (en) * | 2019-06-14 | 2019-09-20 | 山东盛隆安全技术有限公司 | A kind of fuel gas pipeline leakage Tube Bundle Monitoring System |
| CN111596002A (en) * | 2020-03-29 | 2020-08-28 | 江苏威尔安智能科技有限公司 | LEL and V0C intelligent online analysis and treatment system for detecting waste gas |
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