Artificial gas closed sampling system and installation method thereof

Abstract

The invention discloses an artificial gas closed sampling system and an installation method thereof.The artificial gas closed sampling system comprises a sampling assembly, a measuring assembly and a sample returning assembly, the sampling assembly comprises a sampling pipe and a sampling valve, part of the sampling pipe is inserted into an artificial gas conveying pipe, the sampling valve is connected with the outlet end of the sampling pipe, and the measuring assembly is connected with the sampling valve; the measuring assembly comprises an artificial gas component absorption device, a gas flowmeter and an anti-explosion sampling pump which are connected in sequence, the artificial gas component absorption device is connected with the sampling valve, the sample returning assembly comprises a sample returning pipe and a sample returning valve, the sample returning pipe is connected with the artificial gas conveying pipe, the sample returning valve is connected with the inlet end of the sample returning pipe, and the sample returning valve is connected with the anti-explosion sampling pump. According to the invention, tail gas after gas sampling is not directly discharged into the atmosphere, pollution to the environment is avoided, meanwhile, the possibility that sampling personnel inhale volatile toxic and harmful substances in a sample is avoided, occupational diseases are reduced, and the life safety and body health of the sampling personnel are protected.

Description

Technical Field

[0001] The invention relates to the technical field of gas phase medium collection, and in particular to an artificial gas closed sampling system and an installation method thereof. Background Art

[0002] The combustible gas produced from coal or heavy oil as the main raw materials through processes such as distillation, gasification or cracking is collectively called artificial gas. According to its production method, it can be divided into coal distillation gas, coal gasification gas and oil gasification gas.

[0003] The production process of artificial gas is generally long. The data of artificial gas composition and content: helps production personnel to better control the production process, ensure product quality and production efficiency; helps to optimize energy utilization plans and improve energy utilization efficiency; helps to evaluate its impact on the environment and take corresponding measures to reduce emissions and protect the environment; helps to evaluate safety risks and take corresponding safety measures to ensure production safety. Therefore, the accuracy of artificial gas composition and content detection data is of great significance to coke oven production, environmental protection, energy utilization and safe production.

[0004] However, in the actual production process, due to reasons such as improper design of the sampling device, improper installation of the sampling device, improper sampling operation process, and improper post-sampling analysis, the samples taken cannot accurately reflect the true composition and properties of the artificial gas, thus affecting subsequent analysis and judgment, causing great trouble to production. Summary of the invention

[0005] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0006] In the related art, the design of the sampling device does not meet the requirements of airtightness, and the exhaust gas after sampling is usually directly discharged, which causes harm and pollution to the health of the sampling personnel and the environment. During the sampling operation, the sampling port on the overhead artificial gas pipeline is connected to the pipeline to the ground for sampling, resulting in a large amount of condensed water in the pipeline during sampling, affecting the measurement results.

[0007] In addition, when determining the content of some media in artificial coal gas (for example, naphthalene content), the gas sample temperature in the sampling tube must be controlled to be 5°C to 10°C higher than the air temperature in the main pipe. Especially in winter, it is not easy to keep the temperature of the sampling tube constant at 5°C to 10°C higher than the air temperature in the main pipe. Operating at outdoor temperature will result in naphthalene not being absorbed in the absorption bottle but crystallizing in the sampling tube in advance, resulting in a low naphthalene content measurement result.

[0008] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0009] To this end, an embodiment of the present invention provides an artificial gas closed sampling system, which has the characteristics of high safety, high environmental protection and high sampling accuracy.

[0010] The artificial gas closed sampling system of the embodiment of the present invention comprises:

[0011] A sampling assembly, the sampling assembly comprising a sampling tube and a sampling valve, a portion of the sampling tube is inserted into the artificial gas delivery pipe along the radial direction of the artificial gas delivery pipe, an inlet end of the sampling tube is located inside the artificial gas delivery pipe, an outlet end of the sampling tube is located outside the artificial gas delivery pipe, and the sampling valve is connected to the outlet end of the sampling tube;

[0012] A measuring assembly, the measuring assembly comprising an artificial gas component absorption device, a gas flow meter and an explosion-proof sampling pump which are sequentially connected via pipelines, the artificial gas component absorption device being connected to the sampling valve via a pipeline;

[0013] A sample return assembly, the sample return assembly includes a sample return tube and a sample return valve, the sample return tube is connected to the artificial gas delivery pipe, the sample return tube is located downstream of the sampling tube along the flow direction of the artificial gas, the sample return valve is connected to the inlet end of the sample return tube, and the sample return valve is connected to the explosion-proof sampling pump via a pipeline.

[0014] The closed artificial gas sampling system of the embodiment of the present invention discharges the exhaust gas after gas sampling back into the artificial gas transmission pipe, ensuring that the exhaust gas after gas sampling is not directly discharged into the atmosphere, avoiding pollution to the environment. At the same time, it eliminates the possibility of sampling personnel inhaling volatile toxic and harmful substances in the sample, reduces the occurrence of occupational diseases, and protects the life safety and physical health of sampling personnel.

[0015] In some embodiments, the length of the portion of the sampling tube located inside the artificial gas transmission pipe accounts for one third of the inner diameter of the artificial gas transmission pipe.

[0016] In some embodiments, the end surface of the inlet end of the sampling tube is an inclined surface, and the top end of the inclined surface is located downstream of the bottom end of the inclined surface in the flow direction of the artificial gas.

[0017] In some embodiments, the sampling assembly further includes a first connecting piece and a first clamp ball valve, the first connecting piece includes a first reinforcing ring, a first reducing straight-through and a first flange connected in sequence, the first reinforcing ring is arc-shaped, the arc-shaped concave surface of the first reinforcing ring is connected to the outer peripheral wall of the artificial gas delivery pipe, and a flange of the first clamp ball valve is connected to the first flange;

[0018] The sampling tube includes a first blind plate and a first tube. The first blind plate has a center hole. The first tube passes through the center hole of the first blind plate and is connected to the first blind plate. The first blind plate is connected to the other flange of the first pair of clamped ball valves. The first tube passes through the first pair of clamped ball valves, the first connecting piece and the peripheral wall of the artificial gas delivery pipe in sequence along the radial direction of the artificial gas delivery pipe, so that part of the first tube is located in the artificial gas delivery pipe. The outlet end of the first tube is provided with an external thread, and the external thread of the outlet end of the first tube is matched and connected with the internal thread of the sampling valve.

[0019] In some embodiments, the sample return assembly further includes a second connecting piece and a second clamp ball valve, the second connecting piece includes a second reinforcing ring, a second reducing straight-through and a second flange connected in sequence, the second reinforcing ring is arc-shaped, the arc-shaped concave surface of the second reinforcing ring is connected to the outer peripheral wall of the artificial gas delivery pipe, and a flange of the second clamp ball valve is connected to the second flange;

[0020] The return sample tube includes a second blind plate and a second tube, the second blind plate has a center hole, the outlet end of the second tube is connected to the second blind plate and corresponds to the center hole of the second blind plate, the second blind plate is connected to the other flange of the second pair of clamped ball valves, the inlet end of the second tube is provided with an external thread, and the external thread of the inlet end of the second tube is matched and connected with the internal thread of the return sample valve.

[0021] In some embodiments, the sampling assembly further includes an explosion-proof electric heating jacket, which is wrapped around the first connector, the first clamped ball valve, the sampling tube, and the sampling valve.

[0022] In some embodiments, the measurement component further includes a sampling cabinet, the height of which is adjustable, and the artificial gas component absorption device, the gas flow meter and the explosion-proof sampling pump are all arranged in the sampling cabinet.

[0023] In some embodiments, the measuring component further includes an explosion-proof electric heating belt, and the explosion-proof electric heating belt is arranged on the inner circumferential wall of the sampling cabinet.

[0024] In some embodiments, an electric control device is also included, and the electric control device is connected to the explosion-proof sampling pump, the explosion-proof electric heating sleeve and the explosion-proof electric heating belt.

[0025] The embodiment of the present invention further provides an installation method of the artificial gas closed sampling system.

[0026] The installation method of the embodiment of the present invention is used for the artificial gas closed sampling system described in any of the above embodiments, and the installation method includes:

[0027] The sampling tube and the sample return tube are installed on the straight pipe section of the artificial gas delivery pipe, and the distance between the installation positions of the two and the curved pipe section and the pipe section with a sharp change in cross-sectional shape of the artificial gas delivery pipe is greater than or equal to 1.5 times the diameter of the artificial gas delivery pipe;

[0028] If the sampling tube and the return sample tube are installed on a horizontally arranged straight pipe section of the artificial gas delivery pipe, the distance between the installation position of the sampling tube and the installation position of the return sample tube is greater than or equal to 1.1m;

[0029] If the sampling tube and the return sample tube are installed on a vertically arranged straight pipe section of the artificial gas delivery pipe, the distance between the installation position of the sampling tube and the installation position of the return sample tube is greater than or equal to 0.8m;

[0030] The measuring assembly is installed between the sampling tube and the sample return tube, and is connected to the sampling tube and the sample return tube through a pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of a closed artificial gas sampling system according to an embodiment of the present invention.

[0032] Figure 2 Schematic diagram of a sampling tube according to an embodiment of the present invention.

[0033] Figure 3 Schematic diagram of a short flange according to an embodiment of the present invention.

[0034] Figure 4 Schematic diagram of the sample return tube according to an embodiment of the present invention.

[0035] Figure 5 Schematic diagram of an electronic control device according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1-Electrical control device; 101-Fixed base; 102-Explosion-proof column; 103-Explosion-proof distribution box; 104-Explosion-proof electrical components;

[0038] 2-sampling port; 3-sampling valve; 4-sampling tube; 41-first tube; 42-first blind plate;

[0039] 5-first clamped ball valve; 6-first connecting piece; 61-first reinforcing ring; 62-first reducing straight-through; 63-first flange;

[0040] 7- Explosion-proof electric heating jacket;

[0041] 8-sampling cabinet; 81-artificial gas component absorption device; 82-gas flow meter; 83-explosion-proof sampling pump; 84-connecting pipe; 85-explosion-proof electric heating belt;

[0042] 9-return sample port; 10-return sample valve; 11-return sample tube; 111-second blind plate; 112-second tube;

[0043] 12-Artificial gas transmission pipe. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0045] It should be noted that before installing the artificial gas closed sampling system of the embodiment of the present invention, an extraction hole and a reflux hole are opened in advance on the artificial gas delivery pipe 12 so that samples in the artificial gas delivery pipe 12 can be extracted through the extraction hole and the exhaust gas after gas extraction can be discharged back into the artificial gas delivery pipe 12 through the reflux hole.

[0046] The hole-drilling process includes the pressure-drilling of the manufactured gas, pressure-relieving purging, and cleaning of debris generated by the hole-drilling. The edge of the hole-drilling is not less than 50 mm from the weld on the manufactured gas delivery pipe 12, and the hole is not drilled in the longitudinal and circumferential welds of the main pipe of the manufactured gas delivery pipe 12, and a square hole is not drilled at any position on the pipe, and a hole is not drilled on a short joint or a pipe fitting.

[0047] The closed artificial gas sampling system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, the artificial gas closed sampling system of the embodiment of the present invention includes: a sampling component, a measuring component and a sample return component.

[0049] The sampling assembly includes a sampling tube 4 and a sampling valve 3. A portion of the sampling tube 4 is inserted into the artificial gas delivery pipe 12 along the radial direction of the artificial gas delivery pipe 12 through the extraction hole of the artificial gas delivery pipe 12. The inlet end of the sampling tube 4 is located inside the artificial gas delivery pipe 12, and the outlet end of the sampling tube 4 is located outside the artificial gas delivery pipe 12, that is, the end of the sampling tube 4 located inside the artificial gas delivery pipe 12 is the inlet end, and the end of the sampling tube 4 located outside the artificial gas delivery pipe 12 is the outlet end. The sampling valve 3 is connected to the outlet end of the sampling tube 4, and the sampling valve 3 is used to control the on-off and flow rate of the sampling tube 4.

[0050] The measuring assembly comprises an artificial gas component absorption device 81 , a gas flow meter 82 and an explosion-proof sampling pump 83 which are sequentially connected via pipelines. The artificial gas component absorption device 81 is connected to the sampling valve 3 via pipelines.

[0051] The sample return assembly includes a sample return pipe 11 and a sample return valve 10. The sample return pipe 11 is connected to the artificial gas delivery pipe 12, and the sample return pipe 11 is connected to the artificial gas delivery pipe 12 through the return hole of the artificial gas delivery pipe 12, that is, the sample return pipe 11 is located downstream of the sampling pipe 4 along the flow direction of the artificial gas. The inlet end of the sample return pipe 11 is farther away from the artificial gas delivery pipe 12 than the outlet end of the sample return pipe 11. The sample return valve 10 is connected to the inlet end of the sample return pipe 11. The sample return valve 10 is used to control the on-off and flow rate of the sample return pipe 11. The sample return valve 10 is connected to the explosion-proof sampling pump 83 via a pipeline.

[0052] It is understandable that, in the process of installing the artificial gas closed sampling system of the embodiment of the present invention, the sampling tube 4 and the return sample tube 11 are first installed on the artificial gas delivery pipe 12, and the sampling valve 3 on the sampling tube 4 and the return sample valve 10 on the return sample tube 11 are closed, that is, after the sampling tube 4 and the return sample tube 11 are installed on the artificial gas delivery pipe 12, the sampling valve 3 and the return sample valve 10 are respectively used as the sampling port 2 and the return sample port 9 of the artificial gas delivery pipe 12. Then, the artificial gas component absorption device 81 and the explosion-proof sampling pump 83 are respectively connected to the sampling valve 3 and the return sample valve 10 through pipelines.

[0053] The pipelines between the artificial gas component absorption device 81 , the gas flowmeter 82 and the explosion-proof sampling pump 83 , between the artificial gas component absorption device 81 and the sampling valve 3 , and between the explosion-proof sampling pump 83 and the return sample valve 10 are collectively referred to as connecting pipes 84 .

[0054] During the sampling process, the sampling valve 3 and the return sample valve 10 are opened, the explosion-proof sampling pump 83 is started, and the artificial gas in the artificial gas delivery pipe 12 is extracted into the artificial gas component absorption device 81 through the sampling tube 4. The artificial gas component absorption device 81 includes an absorption device for measuring the naphthalene content, hydrogen sulfide content, and ammonia content in the artificial gas. Different absorption devices are used for gas extraction when measuring different component contents. The artificial gas component absorption device 81 absorbs the components to be measured in the sample, and the tail gas after absorption is discharged back into the artificial gas delivery pipe 12 through the return sample pipe 11. Among them, the temperature and flow rate of the extracted artificial gas are measured by the gas flow meter 82.

[0055] Therefore, the artificial gas closed sampling system of the embodiment of the present invention discharges the exhaust gas after gas extraction back into the artificial gas delivery pipe 12, ensuring that the exhaust gas after gas extraction is not directly discharged into the atmosphere, avoiding pollution to the environment, and at the same time, eliminating the possibility of sampling personnel inhaling volatile toxic and harmful substances in the sample, reducing the occurrence of occupational diseases, and protecting the life safety and physical health of sampling personnel.

[0056] Moreover, the artificial gas component absorption device 81 is a constant temperature device, and the temperature of the absorption liquid inside it meets the appropriate absorption temperature. For example, the absorption bottle for absorbing naphthalene is placed in a temperature-controllable mobile constant temperature box to form the artificial gas component absorption device 81, ensuring that the temperature of the absorption liquid is not higher than 10°C during the sampling process, thereby avoiding the problem that the component to be measured in the sample is not absorbed sufficiently, resulting in inaccurate measurement results.

[0057] In addition, the sampling pump is explosion-proof to meet the safety requirements of artificial gas sampling and measurement and improve the safety of the system.

[0058] In some embodiments, Figure 1 As shown, the length of the portion of the sampling tube 4 located inside the artificial gas delivery pipe 12 accounts for one third of the inner diameter of the artificial gas delivery pipe 12, so as to ensure that the sampling tube 4 can accurately and effectively extract the artificial gas sample. If the sampling tube 4 is not inserted deep enough or too deep, it will lead to inaccurate sampling or even failure to obtain the sample. In addition, the insertion of the sampling tube 4 to one third of the position also ensures that the pressure in the artificial gas delivery pipe 12 will not be greatly affected during the sampling process.

[0059] Furthermore, if Figure 1 and Figure 2 As shown, the end surface of the inlet end of the sampling tube 4 is an inclined surface, and the top end of the inclined surface is located downstream of the bottom end of the inclined surface in the flow direction of the artificial coal gas.

[0060] Specifically, a 45° groove is cut at the inlet end of the sampling tube 4, and the opening direction is aligned with the flow direction of the artificial gas, so that the artificial gas can flow into the sampling tube 4, thereby improving the effectiveness of sampling.

[0061] In some embodiments, Figures 1 to 3 As shown, the sampling assembly also includes a first connecting piece 6 and a first clamped ball valve 5 .

[0062] Among them, the first connecting member 6 includes a first reinforcement ring 61, a first reducing straight through 62 and a first flange 63 which are connected in sequence. The first reinforcement ring 61 is arc-shaped, and the arc-shaped concave surface of the first reinforcement ring 61 is connected to the outer peripheral wall of the artificial gas transmission pipe 12. A flange of the first pair of clamped ball valves 5 is connected to the first flange 63.

[0063] The sampling tube 4 includes a first blind plate 42 and a first tube 41. The first blind plate 42 has a center hole. The first tube 41 passes through the center hole of the first blind plate 42 and is connected to the first blind plate 42. The first blind plate 42 is connected to the other flange of the first clamp ball valve 5. The first tube 41 passes through the first clamp ball valve 5, the first connecting piece 6 and the peripheral wall of the artificial gas delivery pipe 12 in the radial direction of the artificial gas delivery pipe 12 in sequence, so that part of the first tube 41 is located in the artificial gas delivery pipe 12. The outlet end of the first tube 41 is provided with an external thread, and the external thread of the outlet end of the first tube 41 is matched and connected with the internal thread of the sampling valve 3.

[0064] It can be understood that the sampling tube 4 is welded by a perforated blind plate (first blind plate 42) and a stainless steel externally threaded long tube (first tube 41). A hole is bored in the center of the blind plate, and the hole diameter matches the outer diameter of the stainless steel externally threaded long tube. One end of the stainless steel externally threaded long tube has an external thread, which is welded and fixed through the perforated blind plate. The externally threaded part is connected to the thread of the sampling valve 3 to ensure that the externally threaded part is as close to the outside as possible, thereby shortening the gas flow when sampling from the sampling port 2.

[0065] The first connecting piece 6 can be called a short-section flange, which is composed of a reinforcement ring, a different diameter straight-through and a flange welding. The reinforcement ring of the short-section flange is welded and fixed to the outer cylindrical surface of the artificial gas delivery pipe 12. The reinforcement ring is made of a stainless steel plate with an arc laser cut, and the arc facilitates better fitting and welding with the outer cylindrical surface of the artificial gas delivery pipe 12. The reinforcement ring can increase the pipe wall thickness at the opening of the artificial gas delivery pipe 12, improve the impact of the opening of the artificial gas delivery pipe 12 on the quality of the pipeline, and improve the strength of the pipeline. In addition, the reinforcement ring and the outer cylindrical surface of the artificial gas delivery pipe 12 are fully welded after being fitted, and the weld area is treated with anti-corrosion.

[0066] The first pair of clamp ball valves 5 is a flange type clamp ball valve, and the first pair of clamp ball valves 5 has two flanges, so that the two flanges of the first pair of clamp ball valves 5 are respectively connected to the blind plate of the sampling tube 4 and the flange of the first connecting piece 6 by sealing gaskets and bolts, and the stainless steel external threaded long tube of the sampling tube 4 passes through the central channel of the first pair of clamp ball valves 5, the central channel of the short flange and the extraction hole of the artificial gas delivery pipe 12 in sequence and is placed in the artificial gas delivery pipe 12. That is, the end of the stainless steel external threaded long tube of the sampling tube 4 located in the artificial gas delivery pipe 12 is the inlet end of the above-mentioned sampling tube 4, and the end of the stainless steel external threaded long tube of the sampling tube 4 located on the side of the perforated blind plate of the sampling tube 4 away from the artificial gas delivery pipe 12 is the outlet end of the above-mentioned sampling tube 4.

[0067] Thus, the sampling tube 4 is detachably connected to the artificial gas delivery pipe 12 by using the first clamp ball valve 5 and the first connector 6, so as to facilitate the replacement of the sampling tube 4 that has been inserted into the artificial gas delivery pipe 12 for a long time and is corroded by gas. During the replacement process, the bolts connecting the blind plate of the sampling tube 4 and the flange of the first clamp ball valve 5 are removed, and the sampling tube 4 is pulled out of the artificial gas delivery pipe 12, and the first clamp ball valve 5 is closed at the same time.

[0068] In addition, the first wafer ball valve 5 is an ultra-thin wafer ball valve. Since the thickness of the first wafer ball valve 5 affects the installation length of the stainless steel external threaded long tube of the sampling tube 4, the ultra-thin wafer ball valve is used to further shorten the gas flow during sampling.

[0069] Similarly, if Figures 1 to 4 As shown, the return sample assembly also includes a second connecting piece and a second pair of clamped ball valves. The second connecting piece includes a second reinforcement ring, a second reducing straight-through and a second flange connected in sequence. The second reinforcement ring is arc-shaped, and the arc-shaped concave surface of the second reinforcement ring is connected to the outer peripheral wall of the artificial gas delivery pipe 12. One flange of the second pair of clamped ball valves is connected to the second flange.

[0070] The return sample tube 11 includes a second blind plate 111 and a second tube 112. The second blind plate 111 has a center hole. The outlet end of the second tube 112 is connected to the second blind plate 111 and corresponds to the center hole of the second blind plate 111. The second blind plate 111 is connected to the other flange of the second clamped ball valve. The inlet end of the second tube 112 is provided with an external thread, and the external thread of the inlet end of the second tube 112 is connected to the internal thread of the return sample valve 10.

[0071] It can be understood that the second connecting member and the second wafer ball valve are respectively the same as the above-mentioned first connecting member 6 and the first wafer ball valve 5 in structure, connection process and effect. The second connecting member is also a short-section flange, and the second wafer ball valve is also a flange-type ultra-thin wafer ball valve. Please refer to the above explanation and no further elaboration will be given here.

[0072] The return sample tube 11 is also welded by a perforated blind plate (second blind plate 111) and a stainless steel externally threaded short tube (second tube 112). The blind plate is bored in the center, and the hole diameter matches the outer diameter of the stainless steel externally threaded short tube. One end of the stainless steel externally threaded short tube has an external thread, and the non-threaded end of the stainless steel externally threaded short tube is welded and fixed to the blind plate and coaxial with the center hole of the blind plate, and the externally threaded part is connected to the thread of the return sample valve 10. The two flanges of the second pair of clamped ball valves are respectively connected to the blind plate of the return sample tube 11 and the flange of the second connector through sealing gaskets and bolts.

[0073] In some embodiments, Figure 1 As shown, the sampling assembly further includes an explosion-proof electric heating sleeve 7 , which wraps around the first connecting piece 6 , the first clamped ball valve 5 , the sampling tube 4 and the sampling valve 3 .

[0074] It can be understood that the explosion-proof electric heating jacket 7 is used to heat the temperature of the sample gas taken out through the sampling tube 4 so that it meets the requirement of being 5°C to 10°C higher than the air temperature in the artificial gas delivery pipe 12 in any season, thereby improving the accuracy of the measurement result. In addition, the electric heating jacket is also explosion-proof to meet the safety requirements of artificial gas sampling and measurement and improve the safety of the system.

[0075] In some embodiments, Figure 1 As shown, the measurement assembly also includes a sampling cabinet 8, and the height of the sampling cabinet 8 is adjustable. For example, the sampling cabinet 8 has a support leg or support frame with adjustable height, so that the sampling cabinet 8 can be adjusted to a position convenient for sampling personnel to operate. The artificial gas component absorption device 81, the gas flow meter 82 and the explosion-proof sampling pump 83 are all arranged on a support plate in the sampling cabinet 8, and the height of the support plate is also adjustable to facilitate the placement of absorption devices for measuring the content of different components.

[0076] Furthermore, if Figure 1 As shown, the measuring component also includes an explosion-proof electric heating belt 85, which is arranged on the inner wall of the sampling cabinet 8. The explosion-proof electric heating belt 85 is used to increase the temperature inside the cabinet to ensure that the water in the gas flow meter 82 in the sampling cabinet 8 does not freeze in cold seasons and can be used normally.

[0077] In addition, the electric heating belt is also explosion-proof to meet the safety requirements of artificial gas sampling and measurement and improve the safety of the system.

[0078] like Figure 1 and Figure 5 As shown, the artificial gas closed sampling system of the embodiment of the present invention further includes an electric control device 1, which is connected to an explosion-proof sampling pump 83, an explosion-proof electric heating sleeve 7 and an explosion-proof electric heating belt 85 via electric wires.

[0079] It can be understood that the electric control device 1, as the master control unit of the artificial gas closed sampling system of the embodiment of the present invention, is used to control the start and stop and operating power of the explosion-proof sampling pump 83, and to control the power supply and heating temperature of the explosion-proof electric heating sleeve 7 and the explosion-proof electric heating belt 85. In addition, all connecting lines are sleeved with explosion-proof flexible connecting pipes 84 to meet the safety requirements of artificial gas sampling and measurement and improve the safety of the system.

[0080] Specifically, the electric control device 1 includes a fixed base 101, an explosion-proof column 102, an explosion-proof distribution box 103 and explosion-proof electrical components 104. The fixed base 101 is used to be welded on the operating platform divided by the sampling personnel, and plays a major supporting role. The explosion-proof column 102 is used to protect the safety of the electrical components and the surrounding environment. The explosion-proof distribution box 103 is connected to the main power line to power the artificial gas closed sampling system of the embodiment of the present invention. The explosion-proof electrical component 104 is connected to the explosion-proof sampling pump 83, the explosion-proof electric heating sleeve 7 and the explosion-proof electric heating belt 85 via electric wires to play a control role.

[0081] The following describes the installation method of the artificial gas closed sampling system according to the embodiment of the present invention.

[0082] The installation method of the embodiment of the present invention is used for the artificial gas closed sampling system in any of the above embodiments, and the installation method includes:

[0083] The sampling tube 4 and the sample return tube 11 are installed on the straight pipe section of the artificial gas delivery pipe 12, and the distance between their installation positions and the curved pipe section and the pipe section with a sharp change in cross-sectional shape of the artificial gas delivery pipe 12 is greater than or equal to 1.5 times the diameter of the artificial gas delivery pipe 12, thereby ensuring that sampling is performed from a position where the airflow in the artificial gas delivery pipe 12 is stable, thereby improving the stability and effectiveness of sampling.

[0084] If the sampling tube 4 and the return sample tube 11 are installed on the horizontally arranged straight pipe section of the artificial gas delivery pipe 12, the distance between the installation position of the sampling tube 4 and the installation position of the return sample tube 11 is greater than or equal to 1.1m. That is, the distance between the openings on the artificial gas delivery pipe 12 for installing the sampling tube 4 and the return sample tube 11 is not less than 1.1m.

[0085] If the sampling tube 4 and the return sample tube 11 are installed on the vertically arranged straight pipe section of the artificial gas delivery pipe 12, the distance between the installation position of the sampling tube 4 and the installation position of the return sample tube 11 is greater than or equal to 0.8m. The distance between the openings on the artificial gas delivery pipe 12 for installing the sampling tube 4 and the return sample tube 11 is not less than 0.8m.

[0086] It is understandable that by limiting the distance between the sampling tube 4 and the return sample tube 11, a space is reserved for placing the sampling cabinet 8 therebetween. In addition, the gas discharged back into the artificial gas delivery pipe 12 through the return sample tube 11 is prevented from affecting the smoothness of the flow of the sampled gas at the sampling tube 4.

[0087] The measuring assembly is installed between the sampling tube 4 and the sample return tube 11 and connected to the sampling tube 4 and the sample return tube 11 through a pipeline.

[0088] Therefore, the sampling tube 4 and the return sample tube 11 are installed in a standardized manner to ensure that the sampling in the artificial gas transmission pipe 12 is stable and representative, and the corresponding components in the artificial gas are effectively and fully absorbed in the artificial gas component absorption device 81, providing a reliable sampling process for the determination of the component content.

[0089] Specifically, first, a hole is opened in the artificial gas delivery pipe 12, and the assembled first connecting piece 6 and the first pair of clamped ball valves 5 as well as the second connecting piece and the second pair of clamped ball valves are welded at the corresponding openings, and the assembled sampling tube 4 and the sampling valve 3 as well as the return sample tube 11 and the return sample valve 10 are installed on the corresponding pair of clamped ball valves, and the explosion-proof electric heating sleeve 7 is wrapped around the first connecting piece 6, the first pair of clamped ball valves 5, the sampling tube 4 and the sampling valve 3.

[0090] Then, place the sampling cabinet 8 between the sampling tube 4 and the return sample tube 11, adjust the sampling cabinet 8 to an appropriate height according to the operating height of the sampling personnel, weld the sampling cabinet 8 to the operating platform, place the electric control device 1 near the sampling cabinet 8 at a position convenient for operation, and weld the fixed base 101 of the electric control device 1 to the operating platform.

[0091] Finally, the artificial gas component absorption device 81 and the explosion-proof sampling pump 83 in the sampling cabinet 8 are connected to the sampling tube 4 and the sample return tube 11 through the connecting pipe 84, and the explosion-proof sampling pump 83 and the explosion-proof electric heating belt 85 in the sampling cabinet 8 and the explosion-proof electric heating sleeve 7 outside the sampling tube 4 are connected to the explosion-proof electrical components 104 of the electric control device 1 through wires, and the main power line of the electric control device 1 is connected. Thus, the installation of the entire system is completed.

[0092] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0094] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0096] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0097] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A closed artificial gas sampling system, characterized in that: include: A sampling assembly, the sampling assembly comprising a sampling tube and a sampling valve, a portion of the sampling tube is inserted into the artificial gas delivery pipe along the radial direction of the artificial gas delivery pipe, an inlet end of the sampling tube is located inside the artificial gas delivery pipe, an outlet end of the sampling tube is located outside the artificial gas delivery pipe, and the sampling valve is connected to the outlet end of the sampling tube; A measuring assembly, the measuring assembly comprising an artificial gas component absorption device, a gas flow meter and an explosion-proof sampling pump which are sequentially connected via pipelines, the artificial gas component absorption device being connected to the sampling valve via a pipeline; A sample return assembly, the sample return assembly includes a sample return tube and a sample return valve, the sample return tube is connected to the artificial gas delivery pipe, the sample return tube is located downstream of the sampling tube along the flow direction of the artificial gas, the sample return valve is connected to the inlet end of the sample return tube, and the sample return valve is connected to the explosion-proof sampling pump via a pipeline.

2. The artificial gas closed sampling system according to claim 1, characterized in that: The length of the portion of the sampling tube located inside the artificial gas transmission pipe accounts for one third of the inner diameter of the artificial gas transmission pipe.

3. The artificial gas closed sampling system according to claim 1, characterized in that: The end surface of the inlet end of the sampling tube is an inclined surface, and the top end of the inclined surface is located downstream of the bottom end of the inclined surface in the flow direction of the artificial coal gas.

4. The artificial gas closed sampling system according to any one of claims 1 to 3, characterized in that: The sampling assembly further includes a first connecting piece and a first clamp ball valve, wherein the first connecting piece includes a first reinforcing ring, a first reducing straight-through and a first flange which are connected in sequence, the first reinforcing ring is arc-shaped, the arc-shaped concave surface of the first reinforcing ring is connected to the outer peripheral wall of the artificial gas delivery pipe, and a flange of the first clamp ball valve is connected to the first flange; The sampling tube includes a first blind plate and a first tube. The first blind plate has a center hole. The first tube passes through the center hole of the first blind plate and is connected to the first blind plate. The first blind plate is connected to the other flange of the first pair of clamped ball valves. The first tube passes through the first pair of clamped ball valves, the first connecting piece and the peripheral wall of the artificial gas delivery pipe in sequence along the radial direction of the artificial gas delivery pipe, so that part of the first tube is located in the artificial gas delivery pipe. The outlet end of the first tube is provided with an external thread, and the external thread of the outlet end of the first tube is matched and connected with the internal thread of the sampling valve.

5. The artificial gas closed sampling system according to claim 4, characterized in that: The sample return assembly also includes a second connecting piece and a second clamp ball valve, the second connecting piece includes a second reinforcing ring, a second reducing straight-through and a second flange connected in sequence, the second reinforcing ring is arc-shaped, the arc-shaped concave surface of the second reinforcing ring is connected to the outer peripheral wall of the artificial gas delivery pipe, and a flange of the second clamp ball valve is connected to the second flange; The return sample tube includes a second blind plate and a second tube, the second blind plate has a center hole, the outlet end of the second tube is connected to the second blind plate and corresponds to the center hole of the second blind plate, the second blind plate is connected to the other flange of the second pair of clamped ball valves, the inlet end of the second tube is provided with an external thread, and the external thread of the inlet end of the second tube is matched and connected with the internal thread of the return sample valve.

6. The artificial gas closed sampling system according to claim 4, characterized in that: The sampling assembly further includes an explosion-proof electric heating sleeve, which is wrapped around the first connecting piece, the first clamped ball valve, the sampling tube and the sampling valve.

7. The artificial gas closed sampling system according to claim 6, characterized in that: The measuring assembly also includes a sampling cabinet, the height of which is adjustable, and the artificial gas component absorption device, the gas flow meter and the explosion-proof sampling pump are all arranged in the sampling cabinet.

8. The artificial gas closed sampling system according to claim 7, characterized in that: The measuring component also includes an explosion-proof electric heating belt, which is arranged on the inner peripheral wall of the sampling cabinet.

9. The artificial gas closed sampling system according to claim 8, characterized in that: It also includes an electric control device, which is connected to the explosion-proof sampling pump, the explosion-proof electric heating sleeve and the explosion-proof electric heating belt.

10. A method for installing a closed artificial gas sampling system, characterized in that: The installation method is used for the artificial gas closed sampling system according to any one of claims 1 to 9, and the installation method comprises: The sampling tube and the sample return tube are installed on the straight pipe section of the artificial gas delivery pipe, and the distance between the installation positions of the two and the curved pipe section and the pipe section with a sharp change in cross-sectional shape of the artificial gas delivery pipe is greater than or equal to 1.5 times the diameter of the artificial gas delivery pipe; If the sampling tube and the return sample tube are installed on a horizontally arranged straight pipe section of the artificial gas delivery pipe, the distance between the installation position of the sampling tube and the installation position of the return sample tube is greater than or equal to 1.1m; If the sampling tube and the return sample tube are installed on a vertically arranged straight pipe section of the artificial gas delivery pipe, the distance between the installation position of the sampling tube and the installation position of the return sample tube is greater than or equal to 0.8m; The measuring assembly is installed between the sampling tube and the sample return tube, and is connected to the sampling tube and the sample return tube through a pipeline.

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