Multi-station gas monitoring device

Abstract

The embodiment of the utility model discloses a multi-site gas monitoring device, and relates to the technical field of gas monitoring. The multi-site gas monitoring device comprises a plurality of gas sampling pipelines, a sampling pump and an analysis pipeline, and the plurality of gas sampling pipelines are respectively used for receiving gas from different monitoring points. The sampling pump is connected with the plurality of gas sampling pipelines and provides flowing power for gas in the gas sampling pipelines. The analysis pipeline is connected with the sampling pump and used for receiving gas from the gas sampling pipeline, the analysis pipeline comprises a gas analyzer, and the gas analyzer is connected with the gas sampling pipeline through the sampling pump and used for receiving and analyzing the gas. According to the invention, a plurality of sampling pipelines share one gas analyzer, so that the equipment redundancy is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas monitoring, in particular to a multi-site gas monitoring device. BACKGROUND

[0002] In the production process, waste gas needs to be monitored, and the monitoring process at least includes analysis before and after waste gas treatment. At present, factories generally use online monitoring systems to collect and analyze waste gas. Specifically, an online waste gas monitoring system is installed at a monitoring point, and waste gas is continuously introduced into an analysis system, and a built-in analyzer in the system performs cyclic analysis to obtain real-time monitoring data.

[0003] However, in the production process, more than one site will discharge waste gas, which leads to the traditional waste gas monitoring scheme, which requires setting up a waste gas online monitoring system at each site that will discharge waste gas, which is not conducive to cost control. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a multi-site gas monitoring device to improve the problem that one waste gas online monitoring system can only monitor the waste gas of one waste gas discharge site, resulting in increased cost.

[0005] The embodiments of the present application provide a multi-site gas monitoring device, comprising:

[0006] A plurality of gas sampling pipelines are used to receive gas from different monitoring points;

[0007] A sampling pump is connected to the plurality of gas sampling pipelines, and provides power for the flow of gas in the gas sampling pipeline;

[0008] An analysis pipeline is connected to the sampling pump and is used to receive gas from the gas sampling pipeline. The analysis pipeline includes a gas analyzer, which is connected to the gas sampling pipeline through the sampling pump and is used to receive and analyze gas.

[0009] In some embodiments of the present application, the plurality of gas sampling pipelines includes a first sampling pipeline, which is in communication with a heat tracing pipeline of a first monitoring point;

[0010] The multi-site gas monitoring device further includes a first compressed gas source pipeline, which is connected to the first sampling pipeline;

[0011] The first compressed air source pipeline comprises a first electromagnetic valve and a first pipeline, the first sampling pipeline comprises a first air control valve and a second pipeline, the first electromagnetic valve is arranged on the first pipeline to control opening and closing of the first pipeline, the first air control valve is arranged on the second pipeline to control opening and closing of the second pipeline, one end of the first pipeline is connected to a compressed air source, and the other end is connected to the first air control valve, one end of the second pipeline is connected to the heat tracing pipeline of the first monitoring point, and the other end is connected to the sampling pump.

[0012] In some embodiments of the present application, the plurality of gas sampling pipelines comprises a second sampling pipeline, the second sampling pipeline is in communication with a heat tracing pipeline of a second monitoring point;

[0013] The multi-site gas monitoring device further comprises a second compressed air source pipeline, the second compressed air source pipeline is connected to the second sampling pipeline;

[0014] The second compressed air source pipeline comprises a second electromagnetic valve and a third pipeline, the second sampling pipeline comprises a second air control valve and a fourth pipeline, the second electromagnetic valve is arranged on the third pipeline to control opening and closing of the third pipeline, the second air control valve is arranged on the fourth pipeline to control opening and closing of the fourth pipeline, one end of the third pipeline is connected to a compressed air source, and the other end is connected to the second air control valve, one end of the fourth pipeline is connected to the heat tracing pipeline of the second monitoring point, and the other end is connected to the sampling pump.

[0015] In some embodiments of the present application, the first sampling pipeline further comprises a first high-temperature filter, the first high-temperature filter is arranged on the second pipeline to perform high-temperature filtering on the gas in the second pipeline; the second sampling pipeline further comprises a second high-temperature filter, the second high-temperature filter is arranged on the fourth pipeline to perform high-temperature filtering on the gas in the fourth pipeline.

[0016] In some embodiments of the present application, the analysis pipeline comprises a fifth pipeline and a sixth pipeline, one end of the fifth pipeline is connected to the sampling pump, and the other end is connected to the gas analyzer, a third air control valve is arranged on the fifth pipeline to control opening and closing of the fifth pipeline, one end of the sixth pipeline is connected to the third air control valve, and the other end is connected to the compressed air source, a third electromagnetic valve is arranged on the sixth pipeline to control opening and closing of the sixth pipeline.

[0017] In some embodiments of the present application, a third high-temperature filter is arranged on the fifth pipeline, and the third high-temperature filter is located between the third air control valve and the sampling pump.

[0018] In some embodiments of the present application, the multi-site gas monitoring device further comprises a detection pipeline connected to the output end of the sampling pump for detecting the humidity and oxygen content of the gas;

[0019] The detection pipeline comprises a seventh pipeline and a monitoring sensor, one end of the seventh pipeline is connected to the sampling pump, and the other end is connected to a gas collector, and the monitoring sensor is arranged on the seventh pipeline for monitoring the humidity and oxygen content of the gas in the seventh pipeline.

[0020] In some embodiments of the present application, the detection pipeline further comprises a first flow regulating valve arranged on the seventh pipeline for controlling the flow of the seventh pipeline, and the first flow regulating valve is located between the monitoring sensor and the sampling pump; the sampling pump is connected with a second flow regulating valve.

[0021] In some embodiments of the present application, the multi-site gas monitoring device further comprises a gas calibration pipeline connected with the analysis pipeline;

[0022] The gas calibration pipeline comprises a standard gas source, a flow meter, a fourth electromagnetic valve, a one-way valve and an eighth pipeline, one end of the eighth pipeline is in communication with the standard gas source, and the other end is connected with the analysis pipeline, along the direction from the end of the eighth pipeline in communication with the standard gas source to the end of the eighth pipeline connected with the analysis pipeline, the flow meter, the fourth electromagnetic valve and the one-way valve are arranged on the eighth pipeline in sequence.

[0023] In some embodiments of the present application, the multi-site gas monitoring device further comprises a heating box, a part of the gas sampling pipeline is located in the heating box, and the other part extends to the outside of the heating box, the sampling pump is arranged in the heating box, a part of the analysis pipeline is arranged in the heating box, and the gas analyzer in the analysis pipeline is located outside the heating box.

[0024] It can be seen that the multi-site gas monitoring device disclosed by the embodiment of the application is composed of a plurality of sampling pipelines, a sampling pump and an analysis pipeline, and is aimed at realizing gas monitoring of a plurality of monitoring points. By sharing one gas analyzer by the plurality of sampling pipelines, equipment redundancy is reduced. By sharing the sampling pump and the analyzer, the number of independent components of the system is reduced, and the maintenance complexity is reduced. In addition, the sampling points are automatically switched, and the sampling pump and the analysis pipeline are uniformly controlled, so that the problems of low efficiency caused by manual intervention or multi-system management are avoided. In detail, each sampling pipeline is connected with one monitoring point and is responsible for collecting the exhaust sample of the monitoring point. One sampling pump is used to provide negative pressure to drive gas flow. The sampling pump is connected with all the sampling pipelines and is used to maintain stable gas flow when the sampling points are switched. The analysis pipeline includes a gas analyzer, which is used to analyze the composition or concentration of the sample gas. The sampling pump extracts the exhaust gas from the designated monitoring point through the sampling pipeline and transmits it to the analysis pipeline. The gas analyzer analyzes the sample on line and outputs real-time monitoring data. The plurality of sampling pipelines are connected with the analysis pipeline to realize cyclic monitoring of the multi-site. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 A structural schematic diagram of a multi-site gas monitoring device provided by the embodiment of the present application is shown in the figure.

[0027] Figure 2 A structural schematic diagram of another multi-site gas monitoring device provided by the embodiment of the present application is shown in the figure.

[0028] Explanation of reference signs:

[0029] 1, heating box; 2, gas sampling pipeline; 21, first sampling pipeline; 211, first pipeline; 212, second pipeline; 213, first electromagnetic valve; 214, first air control valve; 215, first high-temperature filter; 22, second sampling pipeline; 221, third pipeline; 222, fourth pipeline; 223, second electromagnetic valve; 224, second air control valve; 225, second high-temperature filter; 3, sampling pump; 31, second flow regulating valve; 4, analysis pipeline; 41, fifth pipeline; 411, third air control valve; 412, third high-temperature filter; 42, sixth pipeline; 421, third electromagnetic valve; 43, gas analyzer; 5, detection pipeline; 51, seventh pipeline; 52, monitoring sensor; 53, first flow regulating valve; 54, gas collector; 6, gas calibration pipeline; 61, standard gas pressure source; 62, flow meter; 63, fourth electromagnetic valve; 64, check valve; 65, eighth pipeline; 7, first monitoring point; 8, second monitoring point; 9, compressed air source. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] In the description of the present application, it should be understood that the words "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] Please refer to Figure 1 The embodiments of the present application provide a multi-station gas monitoring device, which comprises a plurality of gas sampling pipelines 2, a sampling pump 3 and an analysis pipeline 4.

[0033] Among them, the plurality of gas sampling pipelines 2 are respectively used to receive gas from different monitoring points. The sampling pump 3 and the plurality of gas sampling pipelines 2 are connected, and provide power for the flow of the gas in the gas sampling pipeline 2. The analysis pipeline 4 is connected with the sampling pump 3, and is used to receive the gas from the gas sampling pipeline 2. The analysis pipeline 4 comprises a gas analyzer 43, which is connected with the gas sampling pipeline 2 through the sampling pump 3, and is used to receive and analyze the gas.

[0034] The technical scheme provided in the application shares one gas analyzer 43 through multiple sampling pipelines, thereby reducing equipment redundancy. By sharing the sampling pump 3 and the analyzer, the number of independent components of the system is reduced, and the maintenance complexity is reduced. In addition, the sampling points are automatically switched, and the sampling pump 3 and the analysis pipeline 4 are uniformly controlled, thereby avoiding the problems of low efficiency caused by manual intervention or multi-system management. In detail, each sampling pipeline is connected with one monitoring point and is responsible for collecting the exhaust gas sample of the monitoring point. One sampling pump 3 is used to provide negative pressure to drive the gas flow. The sampling pump 3 is connected with all the sampling pipelines and is used to maintain stable gas flow when the sampling points are switched. The analysis pipeline 4 includes the gas analyzer 43, which is used to analyze the composition or concentration of the sample gas. The sampling pump 3 draws the exhaust gas from the designated monitoring point through the sampling pipeline and transmits it to the analysis pipeline 4. The gas analyzer 43 performs online analysis on the sample and outputs real-time monitoring data. Multiple sampling pipelines are connected with the analysis pipeline 4 to realize cyclic monitoring of multiple sites.

[0035] It should be noted that the multi-site gas monitoring device can further include a control hub, which is signal connected with the sampling pump 3, the gas sampling pipeline 2 and the analysis pipeline 4, thereby realizing control automation. Specifically, the control hub can control the conduction of different gas sampling pipelines 2 to realize the input of gas from different monitoring points, and can also realize the automatic switching of the sampling pump 3, the conduction and cutoff of the analysis pipeline 4 and the switching of the gas analyzer 43.

[0036] In some embodiments, the multiple gas sampling pipelines 2 include a first sampling pipeline 21 and a second sampling pipeline 22. The first sampling pipeline 21 is in communication with the heat tracing pipeline of the first monitoring point 7, and the second sampling pipeline 22 is in communication with the heat tracing pipeline of the second monitoring point 8. By connecting the first sampling pipeline 21 with the heat tracing pipeline of the first monitoring point 7, the gas from the first monitoring point 7 can enter the first sampling pipeline 21, thereby preparing for subsequent gas sampling and analysis. Similarly, the second sampling pipeline 22 is connected with the heat tracing pipeline of the second monitoring point 8, so that the gas from the second monitoring point 8 can enter the second sampling pipeline 22, thereby preparing for subsequent gas sampling and analysis of the second monitoring point 8. The multi-site gas monitoring device further includes a first compressed gas source pipeline and a second compressed gas source pipeline. The first compressed gas source pipeline is connected with the first sampling pipeline 21, and the second compressed gas source pipeline is connected with the second sampling pipeline 22. The first compressed gas source pipeline and the second compressed gas source pipeline are connected to the same compressed air source 9, thereby reducing the number of equipment and the cost. The compressed air source 9 is mainly used to cooperate with the opening and closing of the first compressed gas source pipeline and the second compressed gas source pipeline.

[0037] Further, the first compressed gas source pipeline comprises a first electromagnetic valve 213 and a first pipeline 211, and the first sampling pipeline 21 comprises a second pipeline 212 and a first air control valve 214. One end of the first pipeline 211 is connected with the compressed air source 9, and the other end is connected with the first air control valve 214. The first electromagnetic valve 213 is arranged in the first pipeline 211 and is used for controlling the opening and closing of the first pipeline 211. One end of the second pipeline 212 is connected with the heat tracing pipeline of the first monitoring point 7, and the other end of the second pipeline 212 away from the first monitoring point 7 is connected with the analysis pipeline 4 through the sampling pump 3. The first air control valve 214 is arranged in the second pipeline 212 and is used for controlling the opening and closing of the second pipeline 212. Specifically, when it is necessary to sample and analyze the gas of the first monitoring point 7, the first electromagnetic valve 213 can be closed so that the compressed gas cannot flow to the first air control valve 214. At this time, the first air control valve 214 is in an open state, and the gas in the heat tracing pipeline of the first monitoring point 7 can flow through the second pipeline 212 smoothly. It should be noted that, for the flow of the gas, the sampling pump 3 can provide directional flow power for the flow channel of the gas because the sampling pump 3 is connected with the second pipeline 212, thereby improving the speed of the flow of the gas. After the gas flows through the sampling pump 3, the gas enters the analysis pipeline 4, and the gas analyzer 43 analyzes the gas. When it is not necessary to sample and analyze the gas of the first sampling pipeline 21, the first electromagnetic valve 213 can be opened, so that the compressed gas flows through the first pipeline 211 and then flows to the first air control valve 214, so that the first air control valve 214 is closed, the second pipeline 212 is cut off, and the gas is prevented from flowing through the second pipeline 212. If other sampling pipelines are opened at this time, the switching of the gas analysis of different monitoring points can be realized.

[0038] Further, the first sampling pipeline 21 further comprises a first high-temperature filter 215, and the first high-temperature filter 215 is arranged in the second pipeline 212 and is used for high-temperature filtering the gas in the second pipeline 212.

[0039] In some embodiments, the second compressed gas source pipeline comprises a second electromagnetic valve 223 and a third pipeline 221, the second sampling pipeline 22 comprises a fourth pipeline 222 and a second air control valve 224, one end of the third pipeline 221 is connected with the compressed air source 9, the other end is connected with the second air control valve 224, the second electromagnetic valve 223 is arranged in the third pipeline 221 for controlling the opening and closing of the third pipeline 221, one end of the fourth pipeline 222 is connected with the heat tracing pipeline of the second monitoring point 8, the end of the fourth pipeline 222 away from the second monitoring point 8 is connected with the analysis pipeline 4 through the sampling pump 3, and the second air control valve 224 is arranged in the fourth pipeline 222 for controlling the opening and closing of the fourth pipeline 222. Specifically, when the gas of the second monitoring point 8 needs to be sampled and analyzed, the second electromagnetic valve 223 can be closed so that the compressed gas cannot flow to the second air control valve 224, at this time, the second air control valve 224 is in an open state, and the gas in the heat tracing pipeline of the second monitoring point 8 can flow through the fourth pipeline 222 smoothly. It should be noted that for the flow of the gas, the sampling pump 3 can provide directional flow power for the flow channel of the gas because it is connected with the fourth pipeline 222, thereby improving the speed of the flow of the gas. After the gas flows through the sampling pump 3, it enters the analysis pipeline 4, and the gas analyzer 43 analyzes the gas. When the gas of the second sampling pipeline 22 does not need to be sampled and analyzed, the second electromagnetic valve 223 can be opened, so that the compressed gas flows through the third pipeline 221 and then flows to the second air control valve 224, so that the second air control valve 224 is closed and the fourth pipeline 222 is cut off, thereby preventing the gas from flowing through the fourth pipeline 222. If other sampling pipelines are opened at this time, the switching of the gas analysis of different monitoring points can be realized.

[0040] Further, the second sampling pipeline 22 further comprises a second high-temperature filter 225, and the second high-temperature filter 225 is arranged in the fourth pipeline 222 for high-temperature filtering of the gas in the fourth pipeline 222.

[0041] In some embodiments, the analysis pipeline 4 comprises a fifth pipeline 41 and a sixth pipeline 42. One end of the fifth pipeline 41 is connected with the sampling pump 3, and the other end is connected with the gas analyzer 43, for receiving the gas drawn by the sampling pump 3 and guiding the gas into the gas analyzer 43 to realize the analysis of the gas. The fifth pipeline 41 is provided with a third air control valve 411 for controlling the opening and closing of the fifth pipeline 41. One end of the sixth pipeline 42 is connected with the third air control valve 411, and the other end is connected with the compressed air source 9. The sixth pipeline 42 is provided with a third electromagnetic valve 421 for controlling the opening and closing of the sixth pipeline 42. When it is needed to open the fifth pipeline 41, the third electromagnetic valve 421 is controlled to be closed, and the third air control valve 411 is opened. At this time, the gas entering the fifth pipeline 41 through the sampling pump 3 can flow into the gas analyzer 43 to realize the analysis of the gas. When it is needed to close the fifth pipeline 41, the third electromagnetic valve 421 is controlled to be opened, and the compressed air flows through the sixth pipeline 42 and flows to the third air control valve 411, so that the third air control valve 411 is closed. At this time, the fifth pipeline 41 is cut off, and the gas is prevented from flowing into the gas analyzer 43.

[0042] Further, the fifth pipeline 41 is provided with a third high-temperature filter 412. The third high-temperature filter 412 is located between the third air control valve 411 and the sampling pump 3, so that the gas entering the fifth pipeline 41 through the sampling pump 3 can be filtered by the third high-temperature filter 412 in time, and the gas without secondary filtering is prevented from entering the gas analyzer 43 through the third air control valve 411 to affect the analysis result of the gas. By arranging the third high-temperature filter 412, the gas can be double-filtered by the third high-temperature filter 412 in cooperation with the second high-temperature filter 225 or the first high-temperature filter 215.

[0043] In some embodiments, the multi-site gas monitoring device further comprises a detection pipeline 5. The detection pipeline 5 is connected to the output end of the sampling pump 3, for detecting the humidity and oxygen content of the gas. By connecting the detection pipeline 5 to the output end of the sampling pump 3, a part of the gas passing through the sampling pump 3 can flow into the detection pipeline 5, and the detection device in the detection pipeline 5 detects the humidity and oxygen content of the gas. At the same time, the analysis pipeline 4 is also connected to the output end of the sampling pump 3, and will not affect the gas analysis of the analysis pipeline 4. In addition, the number of sampling pumps 3 can be reduced, and the cost of the equipment can be reduced.

[0044] Further, the detection pipeline 5 comprises a seventh pipeline 51 and a monitoring sensor 52. The monitoring sensor 52 can detect the humidity and oxygen content of the gas. One end of the seventh pipeline 51 is connected to the sampling pump 3, and the other end is connected to a gas collector 54 to prevent the gas from being directly discharged into the air without treatment. The monitoring sensor 52 is arranged on the seventh pipeline 51, which can be a combination of a humidity sensor and an oxygen content sensor, or a sensor with both functions.

[0045] In some embodiments, the detection pipeline 5 further comprises a first flow regulating valve 53. The first flow regulating valve 53 is arranged on the seventh pipeline 51 for controlling the flow of the seventh pipeline 51. By arranging the first flow regulating valve 53, the flow of the seventh pipeline 51 can be regulated, and indirectly, the flow of the analysis pipeline 4 can be regulated. Specifically, because the fifth pipeline 41 and the seventh pipeline 51 are both connected to the sampling pump 3, if the first flow regulating valve 53 is not arranged, more gas can flow into the seventh pipeline 51, which can affect the gas sampling analysis of the analysis pipeline 4. By regulating the first flow regulating valve 53, the gas flow of the seventh pipeline 51 is regulated to a suitable value, and the remaining gas will flow to the fifth pipeline 41, for example, the flow ratio of the seventh pipeline 51 and the fifth pipeline 41 is adjusted to 1:9, which can ensure that the gas analyzer 43 can obtain sufficient gas samples, and the humidity and oxygen content of the gas can be detected, and only one regulating valve is needed, which can save equipment cost.

[0046] In some embodiments, the sampling pump 3 is connected with a second flow regulating valve 31 for controlling the gas flow at the sampling pump 3.

[0047] In some embodiments, the multi-site gas monitoring device further comprises a gas calibration pipeline 6. The gas calibration pipeline 6 is connected with the analysis pipeline 4. Specifically, the gas calibration pipeline 6 comprises a standard gas source, a flow meter 62, a fourth electromagnetic valve 63, a one-way valve 64 and an eighth pipeline 65. One end of the eighth pipeline 65 is in communication with the standard gas source, and the other end is connected with the analysis pipeline 4. The flow meter 62, the fourth electromagnetic valve 63 and the one-way valve 64 are sequentially arranged on the eighth pipeline 65 in the direction from the one end of the eighth pipeline 65 in communication with the standard gas source to the other end of the eighth pipeline 65 connected with the analysis pipeline 4. By arranging the flow meter 62 and the standard gas source, the flushing of the pipeline and the pressure balance in the pipeline can be achieved. Specifically, when the first electromagnetic valve 213 is opened, the second electromagnetic valve 223 is opened, the third electromagnetic valve 421 is closed, the sampling pump 3 is closed, and the fourth electromagnetic valve 63 is opened, the compressed gas flows to the first gas control valve 214 and the second gas control valve 224, so that the first gas control valve 214 and the second gas control valve 224 are both closed, ensuring that the gas of the monitoring point does not flow to the sampling pump 3. Because the third electromagnetic valve 421 is closed, the third gas control valve 411 is opened, and the fourth electromagnetic valve 63 is opened, so that the standard gas can flow through the eighth pipeline 65 and enter the fifth pipeline 41, so that the gas can be filtered by the third high-temperature filter 412, and the flushing of the fifth pipeline 41 and the eighth pipeline 65 is realized. Finally, the standard gas enters the gas analyzer 43, which can analyze the standard gas and compare the analysis result of the standard gas with the analysis result of the gas of the monitoring point. When the first electromagnetic valve 213 is opened, the second electromagnetic valve 223 is opened, the third electromagnetic valve 421 is opened, the sampling pump 3 is closed, and the fourth electromagnetic valve 63 is closed, the first gas control valve 214 is closed, the second gas control valve 224 is closed, and the third gas control valve 411 is closed. At this time, the standard gas stops entering the eighth pipeline 65, and the pressure balance of each pipeline in the device and the inside of the gas analyzer 43 is realized. For the one-way valve 64 on the eighth pipeline 65, it is used to prevent the backflow of the standard gas, so that the standard gas can only flow from the fifth pipeline 41 to the gas analyzer 43.

[0048] In some embodiments, please refer to Figure 2The multi-site gas monitoring device further comprises a heating box 1. A part of the gas sampling pipeline 2 is located in the heating box 1, and another part extends to the outside of the heating box 1, and the part extending to the outside of the heating box 1 is mainly used for connecting the heat tracing pipeline of the monitoring point to guide the gas to flow into the gas sampling pipeline 2. The sampling pump 3 is arranged in the heating box 1, and a part of the analysis pipeline 4 is arranged in the heating box 1, and the gas analyzer 43 in the analysis pipeline 4 is located outside the heating box 1 to avoid that the analysis result of the gas analyzer 43 is affected by too high temperature and the service life of the gas analyzer 43 is affected by temperature. In this embodiment, the main pipeline through which the gas flows, including the first pipeline 211, the second pipeline 212, the third pipeline 221, the fourth pipeline 222, the fifth pipeline 41, the sixth pipeline 42, the seventh pipeline 51, the eighth pipeline 65 and the sampling pump 3 are arranged in the heating box 1 as much as possible, and by heating the heating box 1, it is beneficial to ensure that the extracted exhaust gas will not cause VOC concentration loss due to temperature change, and improve the accuracy of analysis.

[0049] Further, the heating box 1 comprises a box body, a heating block, a temperature sensor, a temperature controller and thermal insulation cotton. The heating block and the temperature sensor made of cast aluminum with the same size as the cross section of the box body are arranged in the box body; the power supply line of the heating block and the cable of the temperature sensor are connected to the temperature controller, and the heating temperature of the heating box 1 is controlled by the temperature controller. The outer surface of the box body is provided with the thermal insulation cotton installed by the metal panel to insulate the heating box 1.

[0050] The above has described the basic concept, and it is obvious that the above detailed disclosure is only used as an example and does not constitute a limitation on the present application for those skilled in the art. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0051] At the same time, specific words are used in the present application to describe the embodiments of the present application. As "one embodiment", "an embodiment" and / or "some embodiments" mean a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different positions in the specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be properly combined.

[0052] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0053] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent application are incorporated herein by reference, except for historical application documents that are inconsistent with or conflict with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0054] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-site gas monitoring device, characterized by, The utility model relates to a multi-station gas monitoring device, comprising: a plurality of gas sampling pipelines for receiving gas from different monitoring points; a sampling pump connected to the plurality of gas sampling pipelines to provide power for the flow of gas in the gas sampling pipelines; an analysis pipeline connected to the sampling pump for receiving and analyzing gas from the gas sampling pipelines, the analysis pipeline comprising a gas analyzer connected to the gas sampling pipelines through the sampling pump.

2. The multi-site gas monitoring device of claim 1, wherein, The plurality of gas sampling pipelines comprises a first sampling pipeline in communication with a heat tracing pipeline of a first monitoring point. The multi-station gas monitoring device further comprises a first compressed gas source pipeline connected to the first sampling pipeline. The first compressed gas source pipeline comprises a first electromagnetic valve and a first pipeline, and the first sampling pipeline comprises a first gas control valve and a second pipeline.

3. The multi-site gas monitoring device of claim 2, wherein, The first electromagnetic valve is arranged on the first pipeline to control the opening and closing of the first pipeline. The first gas control valve is arranged on the second pipeline to control the opening and closing of the second pipeline. One end of the first pipeline is connected to a compressed air source, and the other end is connected to the first gas control valve.

4. The multi-site gas monitoring device of claim 3, wherein, One end of the second pipeline is connected to the heat tracing pipeline of the first monitoring point, and the other end is connected to the sampling pump.

5. The multi-site gas monitoring device of claim 4, wherein, The plurality of gas sampling pipelines comprises a second sampling pipeline in communication with a heat tracing pipeline of a second monitoring point.

6. The multi-site gas monitoring device of claim 5, wherein, The multi-station gas monitoring device further comprises a second compressed gas source pipeline connected to the second sampling pipeline. The second compressed gas source pipeline comprises a second electromagnetic valve and a third pipeline, and the second sampling pipeline comprises a second gas control valve and a fourth pipeline. The second electromagnetic valve is arranged on the third pipeline to control the opening and closing of the third pipeline. The second gas control valve is arranged on the fourth pipeline to control the opening and closing of the fourth pipeline. One end of the third pipeline is connected to a compressed air source, and the other end is connected to the second gas control valve. One end of the fourth pipeline is connected to the heat tracing pipeline of the second monitoring point, and the other end is connected to the sampling pump. The first sampling pipeline further comprises a first high-temperature filter arranged on the second pipeline to filter gas in the second pipeline at high temperature. The second sampling pipeline further comprises a second high-temperature filter arranged on the fourth pipeline to filter gas in the fourth pipeline at high temperature. The analysis pipeline comprises a fifth pipeline and a sixth pipeline. One end of the fifth pipeline is connected to the sampling pump, and the other end is connected to the gas analyzer. A third gas control valve is arranged on the fifth pipeline to control the opening and closing of the fifth pipeline. One end of the sixth pipeline is connected to the third gas control valve, and the other end is connected to the compressed air source. A third high-temperature filter is arranged on the fifth pipeline between the third gas control valve and the sampling pump.

7. The multi-site gas monitoring device of any one of claims 1 to 6, wherein, The multi-station gas monitoring device further comprises a detection pipeline connected to the output end of the sampling pump for detecting the humidity and oxygen content of the gas; The detection pipeline comprises a seventh pipeline and a monitoring sensor, one end of the seventh pipeline is connected to the sampling pump, the other end is connected to a gas collector, and the monitoring sensor is arranged on the seventh pipeline for monitoring the humidity and oxygen content of the gas in the seventh pipeline.

8. The multi-site gas monitoring device of claim 7, wherein, The detection pipeline further comprises a first flow regulating valve arranged on the seventh pipeline for controlling the flow capacity of the seventh pipeline, and the first flow regulating valve is located between the monitoring sensor and the sampling pump; The sampling pump is connected with a second flow regulating valve.

9. The multi-site gas monitoring device of any one of claims 1 to 6, wherein, The multi-station gas monitoring device further comprises a gas calibration pipeline connected with the analysis pipeline; The gas calibration pipeline comprises a standard gas source, a flow meter, a fourth electromagnetic valve, a one-way valve and an eighth pipeline, one end of the eighth pipeline is in communication with the standard gas source, the other end is connected with the analysis pipeline, along the direction from the end of the eighth pipeline in communication with the standard gas source to the end of the eighth pipeline connected with the analysis pipeline, the flow meter, the fourth electromagnetic valve and the one-way valve are arranged on the eighth pipeline in sequence.

10. The multi-site gas monitoring device of any one of claims 1 to 6, wherein, The multi-station gas monitoring device further comprises a heating box, a part of the gas sampling pipeline is located in the heating box, another part extends to the outside of the heating box, the sampling pump is arranged in the heating box, a part of the analysis pipeline is arranged in the heating box, and the gas analyzer in the analysis pipeline is located outside the heating box.

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