Device for filtering and detecting solid impurities in natural gas and online detection method thereof

Abstract

The invention belongs to the technical field of filtration and detection of solid impurities in natural gas, and relates to a filtration and detection device for solid impurities in natural gas and an online detection method thereof. The filtering detection device comprises a horizontal filtering separator, a detection box, an X-ray fluorescence spectrometer and an Internet of Things module, a glass fiber reinforced plastic pipeline is installed in the detection box in a penetrating mode, a sampling pipe is connected between a cylinder of the horizontal filtering separator and the glass fiber reinforced plastic pipeline, and a first electromagnetic valve is installed at the bottom end of the glass fiber reinforced plastic pipeline. The filtering and detecting device can filter out solid impurities in natural gas, the X-ray fluorescence spectrophotometer can be used for detecting solid impurity components collected in the glass fiber reinforced plastic pipeline on line, and on the basis of an on-line detection result, station yard workers can master the solid impurity components in the natural gas entering a station in time, and an abnormal detection result is fed back to an upstream station yard; an upstream station yard is helped to rectify the defect of insufficient filtration of outbound natural gas in time, and the corrosion of a gas pipeline can be helped to be found in time by detecting the scrap iron component in the solid impurities.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid impurity filtration and detection in natural gas, and particularly relates to a filtration and detection device for solid impurities in natural gas and an on-line detection method for solid impurities in natural gas. Background Technique

[0002] In natural gas transmission and distribution stations, filtration and separation equipment is set up to filter and separate solid impurities and liquid impurities in the incoming natural gas to protect downstream equipment and gas transmission pipelines. For example, horizontal filter separators are commonly used to filter and separate solid impurities and liquid impurities in natural gas. Although the existing horizontal filter separators can filter out solid impurities in the incoming natural gas, they cannot on-line detect the components of solid impurities in natural gas, so that the station staff cannot timely analyze the source of the components of solid impurities and cannot master the transmission and distribution of upstream natural gas; because the accumulation of solid impurities causes the filter element to become blocked, resulting in a large pressure difference between the inlet and outlet of the horizontal filter separator. When the station staff open the quick-opening blind plate to clean the solid impurities blocking the filter element inside the horizontal filter separator during shutdown, they can only manually sample and analyze the components contained in the solid impurities, and there is a serious lag in mastering the components of solid impurities in upstream natural gas. For example, because the upstream natural gas pipeline is corroded, iron filings are present in the solid impurities, and the existing horizontal filter separator cannot on-line detect the components of solid impurities, resulting in the station staff being unable to timely learn about the pipeline corrosion situation. It is not until the solid impurities are cleaned out during shutdown and sampled and analyzed that the iron filings component is detected. At this time, the pipeline corrosion situation may be very serious. Summary of the Invention

[0003] The present invention aims to propose a filtration and detection device for solid impurities in natural gas and its on-line detection method to solve the problem that the existing horizontal filter separator lacks on-line detection of the components of solid impurities when filtering solid impurities in incoming natural gas as mentioned in the above background technique.

[0004] The present invention is achieved through the following technical solutions: A solid impurity filtration and detection device for natural gas, comprising a horizontal filtration separator. The interior of the cylinder body of the horizontal filtration separator is divided into a feed gas distribution chamber and a confluence outlet chamber by an intermediate partition, and a plurality of filter elements are arranged in the feed gas distribution chamber; a detection box is arranged below the cylinder body of the horizontal filtration separator. A fiberglass pipe is installed inside the detection box. A sampling pipe is arranged between the detection box and the cylinder body. The top end of the sampling pipe is welded to the side wall of the cylinder body and communicated with the inner bottom of the feed gas distribution chamber, so that the solid impurities filtered out in the feed gas distribution chamber can fall into the sampling pipe. The bottom end of the sampling pipe is connected to the top end of the fiberglass pipe. The sampling pipe is used to guide the solid impurities filtered out in the feed gas distribution chamber into the fiberglass pipe. A first solenoid valve is installed at the bottom end of the fiberglass pipe, and a discharge pipe is connected to the bottom end of the first solenoid valve. By closing the first solenoid valve, solid impurities can accumulate in the fiberglass pipe for detection; an X-ray fluorescence spectrometer for detecting the composition of the solid impurities collected in the fiberglass pipe and an Internet of Things module for real-time uploading the detection data of the X-ray fluorescence spectrometer to the computer of the station control center are installed inside the detection box. The computer of the station control center can receive and process the detection data transmitted by the X-ray fluorescence spectrometer, so as to analyze the components contained in the solid impurities filtered out by the horizontal filtration separator, enabling the station staff to timely master the composition of the solid impurities in the upstream natural gas entering the station.

[0005] Further, an automatic knocking device for knocking the cylinder body to promote the solid impurities in the feed gas distribution chamber to fall into the sampling pipe is arranged on the outer side wall of the feed gas distribution chamber. Under the knocking action of the automatic knocking device, an impact force is generated on the cylinder body, which can promote the solid impurities attached to the outer surface of the filter element to fall to the inner bottom of the feed gas distribution chamber, and promote the solid impurities at the inner bottom of the feed gas distribution chamber to fall into the fiberglass pipe through the sampling pipe for the X-ray fluorescence spectrometer to detect the composition.

[0006] Further, the top of the sampling pipe is funnel-shaped, having a larger inlet, which can help the solid impurities in the feed gas distribution chamber to more easily fall into the sampling pipe.

[0007] Further, a second solenoid valve is installed on the sampling pipe. The station staff can control the opening and closing of the second solenoid valve at the station control center. After closing the second solenoid valve, it is convenient to maintain the detection box and the component structures installed inside it. After opening the first solenoid valve and the second solenoid valve, the high-pressure natural gas entering the feed gas distribution chamber of the horizontal filtration separator can be used to flush out the solid impurities in the sampling pipe and the fiberglass pipe, which helps the subsequent filtered solid impurities to enter the fiberglass pipe for composition detection, has a certain cleaning effect on the solid impurities filtered out in the feed gas distribution chamber, and can prevent the solid impurities in the feed gas distribution chamber from accumulating and blocking the filter element.

[0008] Furthermore, the detection box is composed of a box body with an open front structure and a box door arranged on the front side of the box body. Both the box body and the box door are made of composite boards, which are composed of double-layer steel plates and a lead plate sandwich arranged between the double-layer steel plates, helping to improve the radiation protection performance of the detection box and reducing the radiation leakage during the operation of the X-ray fluorescence spectrometer.

[0009] The present invention also proposes an on-line detection method for solid impurities in natural gas, using the aforementioned filtering and detection device for on-line detection of solid impurities in natural gas. The operation steps include: S1. Filter solid impurities: Start the horizontal filter separator to filter the solid impurities in the incoming natural gas, and the solid impurities filtered by the filter element remain in the feed gas distribution cavity. S2. Collect solid impurities with a fiberglass pipe: Close the first solenoid valve and open the second solenoid valve. The solid impurities in the feed gas distribution cavity fall into the fiberglass pipe through the sampling pipe for the X-ray fluorescence spectrometer to detect the composition. S3. Detect the composition of solid impurities: Start the X-ray fluorescence spectrometer in the detection box. The X-ray fluorescence spectrometer detects the composition of the solid impurities in the fiberglass pipe. The Internet of Things module uploads the detection data of the X-ray fluorescence spectrometer to the computer of the station control center in real time. The computer of the station control center receives and processes the detection data transmitted by the X-ray fluorescence spectrometer, and analyzes the composition of the solid impurities filtered by the horizontal filter separator.

[0010] Furthermore, the above operation steps also include: S4. Open the first solenoid valve, and use high-pressure natural gas to flush out the solid impurities in the sampling pipe and the fiberglass pipe, making the fiberglass pipe unobstructed again for collecting solid impurities again. This helps the subsequently filtered solid impurities to enter the fiberglass pipe for composition detection. The automatic opening and closing control of the first solenoid valve can be realized by using a PLC controller to regularly discharge the solid impurities collected in the fiberglass pipe for composition detection.

[0011] Furthermore, in the above step S2, start the automatic knocking device. Under the knocking action of the automatic knocking device, an impact force is generated on the cylinder body, which can promote the solid impurities attached to the outer surface of the filter element to fall to the bottom of the feed gas distribution cavity, and promote the solid impurities at the bottom of the feed gas distribution cavity to fall into the fiberglass pipe through the sampling pipe for the X-ray fluorescence spectrometer to detect the composition.

[0012] As can be seen from the above technical solutions, a device for filtering and detecting solid impurities in natural gas and its on-line detection method provided by the present invention have the beneficial effects that: (1) The filtration and detection device can filter solid impurities in the incoming natural gas, guide the solid impurities into the fiberglass pipeline in the detection box, and use the X-ray fluorescence spectrometer installed in the detection box to detect the composition of the solid impurities online. Through the Internet of Things module, the detection data of the X-ray fluorescence spectrometer can be uploaded to the computer of the station control center in real time. On the computer of the station control center, the detection data transmitted by the X-ray fluorescence spectrometer can be received and processed, so as to analyze the components contained in the solid impurities filtered by the horizontal filter separator. (2) Based on the online detection results of the composition of solid impurities by the online detection method of solid impurities in natural gas, it helps the station staff to timely master the composition of solid impurities in the upstream natural gas entering the station, and can feedback the abnormal parts of the detection results to the upstream natural gas transmission station, providing intelligence support for the natural gas filtration and separation of the upstream natural gas transmission station. It helps the upstream natural gas transmission station to timely rectify the deficiencies in the natural gas filtration and separation of the downward transmission. Through the online detection of the iron filings component in the solid impurities, it can also help the station staff to timely discover the corrosion problem of the gas transmission pipeline between the upstream and downstream natural gas stations, and can timely judge whether there is rust in the upstream natural gas transmission pipeline. Description of the Drawings

[0013] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0014] Figure 1 It is a schematic structural diagram of the present invention.

[0015] Figure 2 is Figure 1 the sectional view structural diagram in the A-A direction in

[0016] Figure 3 It is a schematic diagram of the structural principle and online detection principle of the X-ray fluorescence spectrometer in the present invention.

[0017] In the drawings: 1-horizontal filter separator, 1.1-cylinder body, 1.2-middle partition board, 1.3-feed gas distribution chamber, 1.4-confluence discharge chamber, 1.5-filter element, 2-detection box, 2.1-box body, 2.2-box door, 3-automatic knocking device, 4-X-ray fluorescence spectrometer, 5-fiberglass pipeline, 6-sampling pipe, 7-first solenoid valve, 8-discharge pipe, 9-second solenoid valve. Detailed Embodiments

[0018] The embodiments of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] Embodiment 1

[0021] A device for filtering and detecting solid impurities in natural gas, as Figure 1 and Figure 2 shown, mainly consists of a horizontal filter separator 1, a detection box 2, an automatic knocking device 3, an X-ray fluorescence spectrometer 4, and an Internet of Things module; As Figure 1 shown, the inside of the cylinder body 1.1 of the horizontal filter separator 1 is divided into a feed gas distribution chamber 1.3 and a confluence outlet chamber 1.4 by an intermediate partition 1.2. A plurality of filter elements 1.5 are arranged in the feed gas distribution chamber 1.3. Specifically, a plurality of support pipes are installed on the intermediate partition 1.2. The support pipes are located inside the feed gas distribution chamber 1.3. The central axes of the support pipes are parallel to the central axis of the cylinder body 1.1. The right ends of the support pipes are fixed on the intermediate partition 1.2. Through holes for connecting the support pipes and the confluence outlet chamber 1.4 are opened on the intermediate partition 1.2. The left ends of the support pipes are connected to the filter elements 1.5. The support pipes can support the filter elements 1.5, and the inside of the filter elements 1.5 is communicated with the inside of the support pipes. A natural gas inlet is provided on the side wall of the cylinder body 1.1 above the support pipes. A quick-opening blind plate is provided at the left end of the cylinder body 1.1. A natural gas outlet is provided at the right end of the cylinder body 1.1. A mist eliminator is provided in the confluence outlet chamber 1.4. A liquid collection tank is provided below the cylinder body 1.1. The liquid collection tank is provided with connecting pipes to both the feed gas distribution chamber 1.3 and the confluence outlet chamber 1.4. A sewage discharge pipe is provided on the liquid collection tank; the composition structure of the above horizontal filter separator 1 is an existing structure and is recorded in existing product structures. For example, the horizontal filter separator 1 with the model FS202A. In addition, a pressure gauge and the like are also provided on the cylinder body 1.1 of the horizontal filter separator 1. This application does not involve the technical improvement of this part of the structure of the horizontal filter separator 1 and will not be elaborated here; As Figure 1 and Figure 2As shown in the figure, the detection box 2 is arranged below the cylinder body 1.1 of the horizontal filter separator 1. A fiberglass reinforced plastic pipe 5 is installed inside the detection box 2. A sampling pipe 6 is arranged between the detection box 2 and the cylinder body 1.1. The top end of the sampling pipe 6 is welded to the side wall of the cylinder body 1.1 and communicated with the inner bottom of the feed gas distribution chamber 1.3, so that the solid impurities filtered out in the feed gas distribution chamber 1.3 can fall into the sampling pipe 6. The bottom end of the sampling pipe 6 is connected to the top end of the fiberglass reinforced plastic pipe 5. The sampling pipe 6 is used to guide the solid impurities filtered out in the feed gas distribution chamber 1.3 to fall into the fiberglass reinforced plastic pipe 5. A first electromagnetic valve 7 is installed at the bottom end of the fiberglass reinforced plastic pipe 5. The bottom end of the first electromagnetic valve 7 is connected with a discharge pipe 8. When the first electromagnetic valve 7 is closed, solid impurities can accumulate in the fiberglass reinforced plastic pipe 5 for detection; As Figure 2 shown in the figure, there are two automatic knocking devices 3, and the two automatic knocking devices 3 are respectively installed on the front outer wall and the rear outer wall of the feed gas distribution chamber 1.3. It is used to knock the cylinder body 1.1 to promote the solid impurities in the feed gas distribution chamber 1.3 to fall into the sampling pipe 6. Under the knocking action of the automatic knocking device 3, an impact force is generated on the cylinder body 1.1, which can promote the solid impurities attached to the outer surface of the filter element 1.5 to fall to the inner bottom of the feed gas distribution chamber 1.3, and promote the solid impurities at the inner bottom of the feed gas distribution chamber 1.3 to fall into the fiberglass reinforced plastic pipe 5 through the sampling pipe 6 for X-ray fluorescence spectrometer 4 to detect the composition; specifically, the automatic knocking device 3 adopts a pneumatic knocking hammer, such as the on-sale models of QZD-200, SK / AH30 / 40 / 60 / 80 series, FP-U series. The structural improvement of the pneumatic knocking hammer is not involved in this application, and the on-sale products can be directly purchased and installed for use. Its working principle is the prior art and will not be elaborated here; As Figure 1 shown in the figure, the X-ray fluorescence spectrometer 4 is installed inside the detection box 2 and is used to detect the composition of the solid impurities collected in the fiberglass reinforced plastic pipe 5. The Internet of Things module is used to upload the detection data of the X-ray fluorescence spectrometer 4 to the computer of the station control center in real time. It should be noted here that the Internet of Things module and the computer of the station control center are both conventional equipment in the natural gas transmission station. The Internet of Things module can be a wireless network transmission module or a data line transmission module, and the X-ray fluorescence spectrometer 4 can be directly connected. The reason for using the fiberglass reinforced plastic pipe 5 inside the detection box 2 is to reduce the detection interference on the X-ray fluorescence spectrometer 4; specifically, the X-ray fluorescence spectrometer 4 is an existing product, and a portable XRF instrument can be used, such as the on-sale models of S350, K600, etc. The portable XRF instrument can be connected to the computer of the station control center through the Internet of Things module. In addition, as Figure 3As shown, the X-ray fluorescence spectrometer 4 can also adopt an on-line XRF analyzer, which is composed of an X-ray tube, a silicon drift detector, a preamplifier, a pulse shaping amplifier, a multi-channel analyzer, etc. It is connected to the computer of the station control center through an RS485 or TCP / IP communication protocol Internet of Things module. The computer of the station control center can receive and process the detection data transmitted by the X-ray fluorescence spectrometer 4, so as to analyze the components contained in the solid impurities filtered out by the horizontal filter separator 1, enabling the station staff to timely master the solid impurity components in the upstream natural gas and providing feedback information for the upstream natural gas transmission station. The analysis of the solid impurity components by the computer of the station control center belongs to the prior art. For example, a portable XRF instrument can analyze the solid impurity components and output the results. The computer of the station control center can intuitively display the components contained in the solid impurities for the station staff to know. In addition, the analysis system of the existing laboratory XRF equipment also has the ability to analyze the solid impurity components and issue detection results, which will not be elaborated here.

[0022] As a preferred embodiment, in this embodiment, as Figure 1 and Figure 2 shown, the top of the sampling tube 6 is funnel-shaped, having a large inlet, which can help the solid impurities in the feed gas distribution chamber 1.3 to more easily fall into the sampling tube 6.

[0023] As a preferred embodiment, in this embodiment, as Figure 1 and Figure 2 shown, a second solenoid valve 9 is installed on the sampling tube 6. The staff can control the opening and closing of the second solenoid valve 9 at the station control center. After closing the second solenoid valve 9, it is convenient to maintain the detection box 2 and the component structure installed inside it. After opening the first solenoid valve 7 and the second solenoid valve 9, the high-pressure natural gas entering the feed gas distribution chamber 1.3 of the horizontal filter separator 1 can flush out the solid impurities in the sampling tube 6 and the fiberglass pipeline 5, which helps the solid impurities filtered out subsequently to enter the fiberglass pipeline 5 for component detection, has a certain cleaning effect on the solid impurities filtered out in the feed gas distribution chamber 1.3, and can prevent the solid impurities from accumulating and blocking the filter element 1.5 in the feed gas distribution chamber 1.3.

[0024] As a preferred embodiment, in this embodiment, as Figure 2 shown, the detection box 2 is composed of a box body 2.1 with an open front side and a box door 2.2 arranged on the front side of the box body 2.1. Both the box body 2.1 and the box door 2.2 are made of composite plates, and the composite plates are composed of double-layer steel plates and a lead plate sandwich arranged between the double-layer steel plates, which helps to improve the radiation protection performance of the detection box 2 and can reduce the radiation leakage during the operation of the X-ray fluorescence spectrometer 4.

[0025] Embodiment 2

[0026] An online detection method for solid impurities in natural gas, which uses the filtration detection device described in Embodiment 1 to conduct online detection of solid impurities in natural gas. The operation steps include: S1. Filter solid impurities: Start the horizontal filtration separator 1 to filter the solid impurities in the incoming natural gas. The incoming natural gas enters the feed gas distribution chamber 1.3 through the natural gas inlet on the side wall of the cylinder body 1.1. The natural gas passes through the filter element 1.5 and enters it, and then flows into the confluence outlet chamber 1.4 through the inside of the support pipe. The confluence solid impurities in the incoming natural gas cannot pass through the filter element 1.5 and are retained. The solid impurities filtered out by the filter element 1.5 remain in the feed gas distribution chamber 1.3. S2. Collect solid impurities with the fiberglass pipe 5: Close the first solenoid valve 7, open the second solenoid valve 9, and start the automatic knocking device 3. The solid impurities in the feed gas distribution chamber 1.3 fall into the fiberglass pipe 5 through the sampling pipe 6 for the X-ray fluorescence spectrometer 4 to detect the composition. Under the knocking action of the automatic knocking device 3, an impact force is generated on the cylinder body 1.1, which can promote the solid impurities attached to the outer surface of the filter element 1.5 to fall to the bottom of the feed gas distribution chamber 1.3, and promote the solid impurities at the bottom of the feed gas distribution chamber 1.3 to fall into the fiberglass pipe 5 through the sampling pipe 6 for the X-ray fluorescence spectrometer 4 to detect the composition. S3. Detect the composition of solid impurities: Start the X-ray fluorescence spectrometer 4 in the detection box 2. The X-ray fluorescence spectrometer 4 detects the composition of the solid impurities in the fiberglass pipe 5. The Internet of Things module uploads the detection data of the X-ray fluorescence spectrometer 4 to the computer of the station control center in real time. The computer of the station control center receives and processes the detection data transmitted by the X-ray fluorescence spectrometer 4, and analyzes the composition of the solid impurities filtered out by the horizontal filtration separator 1. S4. Open the first solenoid valve 7, and use high-pressure natural gas to flush out the solid impurities in the sampling pipe 6 and the fiberglass pipe 5 to make the fiberglass pipe 5 unblocked for collecting solid impurities again, which helps the solid impurities filtered out subsequently to enter the fiberglass pipe 5 for composition detection. It is particularly emphasized that through the online detection of the iron filings component in the solid impurities in the incoming natural gas filtered by the horizontal filtration separator 1, this online detection method can help the station staff to timely discover the corrosion problem of the gas transmission pipeline between the upstream and downstream natural gas stations, can timely judge whether there is rust in the upstream natural gas transmission pipeline, and helps to take timely and effective measures before the pipeline is severely corroded.

[0027] In addition, the above-mentioned filtration detection device further includes a PLC controller. The X-ray fluorescence spectrometer 4, the first solenoid valve 7, the second solenoid valve 9, and the automatic knocking device 3 are all electrically connected to the PLC controller. By configuring the PLC controller, automatic on-off control of the first solenoid valve 7 and automatic start-stop control of the X-ray fluorescence spectrometer 4 and the automatic knocking device 3 can be achieved. For example, by setting the opening and closing time interval of the first solenoid valve 7 on the PLC controller, the first solenoid valve 7 is closed for a period of time to collect solid impurities. Before the first solenoid valve 7 is opened, the X-ray fluorescence spectrometer 4 is started for on-line detection of the composition of the solid impurities. Then the first solenoid valve 7 is opened, and the solid impurities in the sampling pipe 6 and the fiberglass pipe 5 are flushed out by the high-pressure natural gas flow. At the initial stage when the first solenoid valve 7 is closed and at the initial stage when it is opened, it can be set that the automatic knocking device 3 starts for a period of time and then stops automatically. Under the knocking action of the automatic knocking device 3, an impact force is generated on the cylinder body 1.1, which can promote the solid impurities attached to the outer surface of the filter element 1.5 to fall to the bottom of the feed gas distribution chamber 1.3, and promote the solid impurities at the bottom of the feed gas distribution chamber 1.3 to fall into the fiberglass pipe 5 through the sampling pipe 6. For example, control the first solenoid valve 7 to be closed for two days so that solid impurities are collected in the fiberglass pipe 5 for two days. When the horizontal filtration separator 1 continuously filters the incoming natural gas without stopping, when the first solenoid valve 7 is opened for nearly two days, start the X-ray fluorescence spectrometer 4 to perform on-line detection of the solid impurities collected in the fiberglass pipe 5, and then open the first solenoid valve 7 to discharge the solid impurities in the fiberglass pipe 5. The start-stop time interval of the first solenoid valve 7 can be set according to the amount of the filtered solid impurities. Based on the irradiation of the fiberglass pipe 5 by the X-ray fluorescence spectrometer 4, the height of the solid impurities in the fiberglass pipe 5 can be displayed. If the time interval is two days and the collected height of the solid impurities in the fiberglass pipe 5 is detected to be relatively low, the interval time can be increased. For example, the opening and closing time interval of the first solenoid valve 7 is adjusted to 5 days so that more solid impurities can be collected in the fiberglass pipe 5 for detection. In addition, a level sensor can also be installed on the upper section of the fiberglass pipe 5 to monitor the height of the solid impurities collected in the fiberglass pipe 5. The level sensor is electrically connected to the PLC controller. When the solid impurities collected in the fiberglass pipe 5 reach the preset height, the level sensor is closed and the X-ray fluorescence spectrometer 4 is started for on-line detection of the composition of the solid impurities. The level sensor is an existing product, such as the MSE-SD80A laser level gauge.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A solid impurity filtering and detecting device in natural gas, comprising a horizontal filter separator, wherein the interior of the cylinder of the horizontal filter separator is divided into a feed air chamber and a converging and discharging chamber by a middle partition, and a plurality of filter elements are arranged in the feed air chamber, characterized in that: Also includes: A detection box, wherein the detection box is arranged below the cylinder of the horizontal filter separator, a glass fiber reinforced plastic pipe is installed inside the detection box, a sampling tube is arranged between the detection box and the cylinder, the top end of the sampling tube is welded to the side wall of the cylinder and is connected to the inner bottom of the feed cloth air cavity, the bottom end of the sampling tube is connected to the top end of the glass fiber reinforced plastic pipe, the sampling tube is used to guide the solid impurities filtered out of the feed cloth air cavity to fall into the glass fiber reinforced plastic pipe, a first solenoid valve is installed at the bottom end of the glass fiber reinforced plastic pipe, and the bottom end of the first solenoid valve is connected to a discharge pipe; X-ray fluorescence spectrometer, which is installed inside the detection box and is used to detect the solid impurity components collected in the FRP pipe; Internet of Things module: The Internet of Things module is used to upload the detection data of the X-ray fluorescence spectrometer to the computer of the station control center in real time.

2. The solid impurity filtering and detecting device in natural gas according to claim 1 is characterized in that: The outer side wall of the feed cloth air cavity is provided with an automatic knocking device for knocking the cylinder to promote the solid impurities in the feed cloth air cavity to fall into the sampling tube.

3. The solid impurity filtering and detecting device in natural gas according to claim 1 or 2, characterized in that: The top of the sampling tube is funnel-shaped.

4. The solid impurity filtering and detecting device in natural gas according to claim 2, characterized in that: A second solenoid valve is installed on the sampling tube.

5. The solid impurity filtering and detecting device in natural gas according to claim 1 is characterized in that: The detection box is composed of a box body with an open front structure and a box door arranged on the front side of the box body. The box body and the box door are both made of composite plates, and the composite plates are composed of double-layer steel plates and lead plate interlayers arranged between the double-layer steel plates.

6. An online detection method for solid impurities in natural gas, characterized in that: The filtering detection device according to claim 4 is used to perform online detection of solid impurities in natural gas, and the operation steps include: S1. Filter solid impurities: Start the horizontal filter separator to filter solid impurities in the incoming natural gas; S2. Collect solid impurities in the FRP pipeline: close the first solenoid valve, open the second solenoid valve, and the solid impurities in the feed cloth air cavity fall into the FRP pipeline through the sampling tube to wait for the X-ray fluorescence spectrometer to detect the composition; S3. Detection of solid impurity components: Start the X-ray fluorescence spectrometer in the detection box. The X-ray fluorescence spectrometer detects the components of solid impurities in the FRP pipe. The Internet of Things module uploads the detection data of the X-ray fluorescence spectrometer to the computer of the station control center in real time. The computer of the station control center receives and processes the detection data transmitted by the X-ray fluorescence spectrometer, and analyzes the components contained in the solid impurities filtered out by the horizontal filter separator.

7. The on-line detection method for solid impurities in natural gas according to claim 6, characterized in that: The above operation steps also include: S4, opening the first solenoid valve, and using high-pressure natural gas to flush out solid impurities in the sampling tube and the glass fiber reinforced plastic pipe.

8. The on-line detection method for solid impurities in natural gas according to claim 6, characterized in that: In the above step S2, the automatic knocking device is started to promote the solid impurities in the air cavity of the feed cloth to fall into the glass fiber reinforced plastic pipe through the sampling tube.

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